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Kumar Gala0bbaf062005-06-20 10:54:21 -05001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * drivers/net/gianfar.c
3 *
4 * Gianfar Ethernet Driver
Andy Fleming7f7f5312005-11-11 12:38:59 -06005 * This driver is designed for the non-CPM ethernet controllers
6 * on the 85xx and 83xx family of integrated processors
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * Based on 8260_io/fcc_enet.c
8 *
9 * Author: Andy Fleming
Kumar Gala4c8d3d92005-11-13 16:06:30 -080010 * Maintainer: Kumar Gala
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +000011 * Modifier: Sandeep Gopalpet <sandeep.kumar@freescale.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012 *
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +000013 * Copyright 2002-2009 Freescale Semiconductor, Inc.
14 * Copyright 2007 MontaVista Software, Inc.
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 *
16 * This program is free software; you can redistribute it and/or modify it
17 * under the terms of the GNU General Public License as published by the
18 * Free Software Foundation; either version 2 of the License, or (at your
19 * option) any later version.
20 *
21 * Gianfar: AKA Lambda Draconis, "Dragon"
22 * RA 11 31 24.2
23 * Dec +69 19 52
24 * V 3.84
25 * B-V +1.62
26 *
27 * Theory of operation
Kumar Gala0bbaf062005-06-20 10:54:21 -050028 *
Andy Flemingb31a1d82008-12-16 15:29:15 -080029 * The driver is initialized through of_device. Configuration information
30 * is therefore conveyed through an OF-style device tree.
Linus Torvalds1da177e2005-04-16 15:20:36 -070031 *
32 * The Gianfar Ethernet Controller uses a ring of buffer
33 * descriptors. The beginning is indicated by a register
Kumar Gala0bbaf062005-06-20 10:54:21 -050034 * pointing to the physical address of the start of the ring.
35 * The end is determined by a "wrap" bit being set in the
Linus Torvalds1da177e2005-04-16 15:20:36 -070036 * last descriptor of the ring.
37 *
38 * When a packet is received, the RXF bit in the
Kumar Gala0bbaf062005-06-20 10:54:21 -050039 * IEVENT register is set, triggering an interrupt when the
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 * corresponding bit in the IMASK register is also set (if
41 * interrupt coalescing is active, then the interrupt may not
42 * happen immediately, but will wait until either a set number
Andy Flemingbb40dcb2005-09-23 22:54:21 -040043 * of frames or amount of time have passed). In NAPI, the
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 * interrupt handler will signal there is work to be done, and
Francois Romieu0aa15382008-07-11 00:33:52 +020045 * exit. This method will start at the last known empty
Kumar Gala0bbaf062005-06-20 10:54:21 -050046 * descriptor, and process every subsequent descriptor until there
Linus Torvalds1da177e2005-04-16 15:20:36 -070047 * are none left with data (NAPI will stop after a set number of
48 * packets to give time to other tasks, but will eventually
49 * process all the packets). The data arrives inside a
50 * pre-allocated skb, and so after the skb is passed up to the
51 * stack, a new skb must be allocated, and the address field in
52 * the buffer descriptor must be updated to indicate this new
53 * skb.
54 *
55 * When the kernel requests that a packet be transmitted, the
56 * driver starts where it left off last time, and points the
57 * descriptor at the buffer which was passed in. The driver
58 * then informs the DMA engine that there are packets ready to
59 * be transmitted. Once the controller is finished transmitting
60 * the packet, an interrupt may be triggered (under the same
61 * conditions as for reception, but depending on the TXF bit).
62 * The driver then cleans up the buffer.
63 */
64
Linus Torvalds1da177e2005-04-16 15:20:36 -070065#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070066#include <linux/string.h>
67#include <linux/errno.h>
Andy Flemingbb40dcb2005-09-23 22:54:21 -040068#include <linux/unistd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070069#include <linux/slab.h>
70#include <linux/interrupt.h>
71#include <linux/init.h>
72#include <linux/delay.h>
73#include <linux/netdevice.h>
74#include <linux/etherdevice.h>
75#include <linux/skbuff.h>
Kumar Gala0bbaf062005-06-20 10:54:21 -050076#include <linux/if_vlan.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070077#include <linux/spinlock.h>
78#include <linux/mm.h>
Grant Likelyfe192a42009-04-25 12:53:12 +000079#include <linux/of_mdio.h>
Andy Flemingb31a1d82008-12-16 15:29:15 -080080#include <linux/of_platform.h>
Kumar Gala0bbaf062005-06-20 10:54:21 -050081#include <linux/ip.h>
82#include <linux/tcp.h>
83#include <linux/udp.h>
Kumar Gala9c07b8842006-01-11 11:26:25 -080084#include <linux/in.h>
Manfred Rudigiercc772ab2010-04-08 23:10:03 +000085#include <linux/net_tstamp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070086
87#include <asm/io.h>
Anton Vorontsov7d350972010-06-30 06:39:12 +000088#include <asm/reg.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070089#include <asm/irq.h>
90#include <asm/uaccess.h>
91#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070092#include <linux/dma-mapping.h>
93#include <linux/crc32.h>
Andy Flemingbb40dcb2005-09-23 22:54:21 -040094#include <linux/mii.h>
95#include <linux/phy.h>
Andy Flemingb31a1d82008-12-16 15:29:15 -080096#include <linux/phy_fixed.h>
97#include <linux/of.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
99#include "gianfar.h"
Andy Fleming1577ece2009-02-04 16:42:12 -0800100#include "fsl_pq_mdio.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101
102#define TX_TIMEOUT (1*HZ)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103#undef BRIEF_GFAR_ERRORS
104#undef VERBOSE_GFAR_ERRORS
105
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106const char gfar_driver_name[] = "Gianfar Ethernet";
Andy Fleming7f7f5312005-11-11 12:38:59 -0600107const char gfar_driver_version[] = "1.3";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109static int gfar_enet_open(struct net_device *dev);
110static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev);
Sebastian Siewiorab939902008-08-19 21:12:45 +0200111static void gfar_reset_task(struct work_struct *work);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112static void gfar_timeout(struct net_device *dev);
113static int gfar_close(struct net_device *dev);
Andy Fleming815b97c2008-04-22 17:18:29 -0500114struct sk_buff *gfar_new_skb(struct net_device *dev);
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +0000115static void gfar_new_rxbdp(struct gfar_priv_rx_q *rx_queue, struct rxbd8 *bdp,
Andy Fleming815b97c2008-04-22 17:18:29 -0500116 struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117static int gfar_set_mac_address(struct net_device *dev);
118static int gfar_change_mtu(struct net_device *dev, int new_mtu);
David Howells7d12e782006-10-05 14:55:46 +0100119static irqreturn_t gfar_error(int irq, void *dev_id);
120static irqreturn_t gfar_transmit(int irq, void *dev_id);
121static irqreturn_t gfar_interrupt(int irq, void *dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122static void adjust_link(struct net_device *dev);
123static void init_registers(struct net_device *dev);
124static int init_phy(struct net_device *dev);
Grant Likely2dc11582010-08-06 09:25:50 -0600125static int gfar_probe(struct platform_device *ofdev,
Andy Flemingb31a1d82008-12-16 15:29:15 -0800126 const struct of_device_id *match);
Grant Likely2dc11582010-08-06 09:25:50 -0600127static int gfar_remove(struct platform_device *ofdev);
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400128static void free_skb_resources(struct gfar_private *priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129static void gfar_set_multi(struct net_device *dev);
130static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr);
Kapil Junejad3c12872007-05-11 18:25:11 -0500131static void gfar_configure_serdes(struct net_device *dev);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700132static int gfar_poll(struct napi_struct *napi, int budget);
Vitaly Woolf2d71c22006-11-07 13:27:02 +0300133#ifdef CONFIG_NET_POLL_CONTROLLER
134static void gfar_netpoll(struct net_device *dev);
135#endif
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +0000136int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit);
137static int gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue);
Dai Haruki2c2db482008-12-16 15:31:15 -0800138static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb,
139 int amount_pull);
Kumar Gala0bbaf062005-06-20 10:54:21 -0500140static void gfar_vlan_rx_register(struct net_device *netdev,
141 struct vlan_group *grp);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600142void gfar_halt(struct net_device *dev);
Scott Woodd87eb122008-07-11 18:04:45 -0500143static void gfar_halt_nodisable(struct net_device *dev);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600144void gfar_start(struct net_device *dev);
145static void gfar_clear_exact_match(struct net_device *dev);
Joe Perchesb6bc7652010-12-21 02:16:08 -0800146static void gfar_set_mac_for_addr(struct net_device *dev, int num,
147 const u8 *addr);
Andy Fleming26ccfc32009-03-10 12:58:28 +0000148static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150MODULE_AUTHOR("Freescale Semiconductor, Inc");
151MODULE_DESCRIPTION("Gianfar Ethernet Driver");
152MODULE_LICENSE("GPL");
153
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +0000154static void gfar_init_rxbdp(struct gfar_priv_rx_q *rx_queue, struct rxbd8 *bdp,
Anton Vorontsov8a102fe2009-10-12 06:00:37 +0000155 dma_addr_t buf)
156{
Anton Vorontsov8a102fe2009-10-12 06:00:37 +0000157 u32 lstatus;
158
159 bdp->bufPtr = buf;
160
161 lstatus = BD_LFLAG(RXBD_EMPTY | RXBD_INTERRUPT);
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +0000162 if (bdp == rx_queue->rx_bd_base + rx_queue->rx_ring_size - 1)
Anton Vorontsov8a102fe2009-10-12 06:00:37 +0000163 lstatus |= BD_LFLAG(RXBD_WRAP);
164
165 eieio();
166
167 bdp->lstatus = lstatus;
168}
169
Anton Vorontsov87283272009-10-12 06:00:39 +0000170static int gfar_init_bds(struct net_device *ndev)
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000171{
Anton Vorontsov87283272009-10-12 06:00:39 +0000172 struct gfar_private *priv = netdev_priv(ndev);
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +0000173 struct gfar_priv_tx_q *tx_queue = NULL;
174 struct gfar_priv_rx_q *rx_queue = NULL;
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000175 struct txbd8 *txbdp;
176 struct rxbd8 *rxbdp;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000177 int i, j;
Anton Vorontsov87283272009-10-12 06:00:39 +0000178
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000179 for (i = 0; i < priv->num_tx_queues; i++) {
180 tx_queue = priv->tx_queue[i];
181 /* Initialize some variables in our dev structure */
182 tx_queue->num_txbdfree = tx_queue->tx_ring_size;
183 tx_queue->dirty_tx = tx_queue->tx_bd_base;
184 tx_queue->cur_tx = tx_queue->tx_bd_base;
185 tx_queue->skb_curtx = 0;
186 tx_queue->skb_dirtytx = 0;
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +0000187
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000188 /* Initialize Transmit Descriptor Ring */
189 txbdp = tx_queue->tx_bd_base;
190 for (j = 0; j < tx_queue->tx_ring_size; j++) {
191 txbdp->lstatus = 0;
192 txbdp->bufPtr = 0;
193 txbdp++;
Anton Vorontsov87283272009-10-12 06:00:39 +0000194 }
195
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000196 /* Set the last descriptor in the ring to indicate wrap */
197 txbdp--;
198 txbdp->status |= TXBD_WRAP;
199 }
200
201 for (i = 0; i < priv->num_rx_queues; i++) {
202 rx_queue = priv->rx_queue[i];
203 rx_queue->cur_rx = rx_queue->rx_bd_base;
204 rx_queue->skb_currx = 0;
205 rxbdp = rx_queue->rx_bd_base;
206
207 for (j = 0; j < rx_queue->rx_ring_size; j++) {
208 struct sk_buff *skb = rx_queue->rx_skbuff[j];
209
210 if (skb) {
211 gfar_init_rxbdp(rx_queue, rxbdp,
212 rxbdp->bufPtr);
213 } else {
214 skb = gfar_new_skb(ndev);
215 if (!skb) {
216 pr_err("%s: Can't allocate RX buffers\n",
217 ndev->name);
218 goto err_rxalloc_fail;
219 }
220 rx_queue->rx_skbuff[j] = skb;
221
222 gfar_new_rxbdp(rx_queue, rxbdp, skb);
223 }
224
225 rxbdp++;
226 }
227
Anton Vorontsov87283272009-10-12 06:00:39 +0000228 }
229
230 return 0;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000231
232err_rxalloc_fail:
233 free_skb_resources(priv);
234 return -ENOMEM;
Anton Vorontsov87283272009-10-12 06:00:39 +0000235}
236
237static int gfar_alloc_skb_resources(struct net_device *ndev)
238{
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000239 void *vaddr;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000240 dma_addr_t addr;
241 int i, j, k;
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000242 struct gfar_private *priv = netdev_priv(ndev);
243 struct device *dev = &priv->ofdev->dev;
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +0000244 struct gfar_priv_tx_q *tx_queue = NULL;
245 struct gfar_priv_rx_q *rx_queue = NULL;
246
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000247 priv->total_tx_ring_size = 0;
248 for (i = 0; i < priv->num_tx_queues; i++)
249 priv->total_tx_ring_size += priv->tx_queue[i]->tx_ring_size;
250
251 priv->total_rx_ring_size = 0;
252 for (i = 0; i < priv->num_rx_queues; i++)
253 priv->total_rx_ring_size += priv->rx_queue[i]->rx_ring_size;
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000254
255 /* Allocate memory for the buffer descriptors */
Anton Vorontsov87283272009-10-12 06:00:39 +0000256 vaddr = dma_alloc_coherent(dev,
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000257 sizeof(struct txbd8) * priv->total_tx_ring_size +
258 sizeof(struct rxbd8) * priv->total_rx_ring_size,
259 &addr, GFP_KERNEL);
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000260 if (!vaddr) {
261 if (netif_msg_ifup(priv))
262 pr_err("%s: Could not allocate buffer descriptors!\n",
263 ndev->name);
264 return -ENOMEM;
265 }
266
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000267 for (i = 0; i < priv->num_tx_queues; i++) {
268 tx_queue = priv->tx_queue[i];
269 tx_queue->tx_bd_base = (struct txbd8 *) vaddr;
270 tx_queue->tx_bd_dma_base = addr;
271 tx_queue->dev = ndev;
272 /* enet DMA only understands physical addresses */
273 addr += sizeof(struct txbd8) *tx_queue->tx_ring_size;
274 vaddr += sizeof(struct txbd8) *tx_queue->tx_ring_size;
275 }
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000276
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000277 /* Start the rx descriptor ring where the tx ring leaves off */
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000278 for (i = 0; i < priv->num_rx_queues; i++) {
279 rx_queue = priv->rx_queue[i];
280 rx_queue->rx_bd_base = (struct rxbd8 *) vaddr;
281 rx_queue->rx_bd_dma_base = addr;
282 rx_queue->dev = ndev;
283 addr += sizeof (struct rxbd8) * rx_queue->rx_ring_size;
284 vaddr += sizeof (struct rxbd8) * rx_queue->rx_ring_size;
285 }
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000286
287 /* Setup the skbuff rings */
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000288 for (i = 0; i < priv->num_tx_queues; i++) {
289 tx_queue = priv->tx_queue[i];
290 tx_queue->tx_skbuff = kmalloc(sizeof(*tx_queue->tx_skbuff) *
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +0000291 tx_queue->tx_ring_size, GFP_KERNEL);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000292 if (!tx_queue->tx_skbuff) {
293 if (netif_msg_ifup(priv))
294 pr_err("%s: Could not allocate tx_skbuff\n",
295 ndev->name);
296 goto cleanup;
297 }
298
299 for (k = 0; k < tx_queue->tx_ring_size; k++)
300 tx_queue->tx_skbuff[k] = NULL;
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000301 }
302
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000303 for (i = 0; i < priv->num_rx_queues; i++) {
304 rx_queue = priv->rx_queue[i];
305 rx_queue->rx_skbuff = kmalloc(sizeof(*rx_queue->rx_skbuff) *
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +0000306 rx_queue->rx_ring_size, GFP_KERNEL);
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000307
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000308 if (!rx_queue->rx_skbuff) {
309 if (netif_msg_ifup(priv))
310 pr_err("%s: Could not allocate rx_skbuff\n",
311 ndev->name);
312 goto cleanup;
313 }
314
315 for (j = 0; j < rx_queue->rx_ring_size; j++)
316 rx_queue->rx_skbuff[j] = NULL;
317 }
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000318
Anton Vorontsov87283272009-10-12 06:00:39 +0000319 if (gfar_init_bds(ndev))
320 goto cleanup;
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000321
322 return 0;
323
324cleanup:
325 free_skb_resources(priv);
326 return -ENOMEM;
327}
328
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000329static void gfar_init_tx_rx_base(struct gfar_private *priv)
330{
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000331 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Anton Vorontsov18294ad2009-11-04 12:53:00 +0000332 u32 __iomem *baddr;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000333 int i;
334
335 baddr = &regs->tbase0;
336 for(i = 0; i < priv->num_tx_queues; i++) {
337 gfar_write(baddr, priv->tx_queue[i]->tx_bd_dma_base);
338 baddr += 2;
339 }
340
341 baddr = &regs->rbase0;
342 for(i = 0; i < priv->num_rx_queues; i++) {
343 gfar_write(baddr, priv->rx_queue[i]->rx_bd_dma_base);
344 baddr += 2;
345 }
346}
347
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000348static void gfar_init_mac(struct net_device *ndev)
349{
350 struct gfar_private *priv = netdev_priv(ndev);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000351 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000352 u32 rctrl = 0;
353 u32 tctrl = 0;
354 u32 attrs = 0;
355
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000356 /* write the tx/rx base registers */
357 gfar_init_tx_rx_base(priv);
Anton Vorontsov32c513b2009-10-12 06:00:36 +0000358
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000359 /* Configure the coalescing support */
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000360 gfar_configure_coalescing(priv, 0xFF, 0xFF);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000361
Sandeep Gopalpet1ccb8382009-12-16 01:14:58 +0000362 if (priv->rx_filer_enable) {
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000363 rctrl |= RCTRL_FILREN;
Sandeep Gopalpet1ccb8382009-12-16 01:14:58 +0000364 /* Program the RIR0 reg with the required distribution */
365 gfar_write(&regs->rir0, DEFAULT_RIR0);
366 }
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000367
368 if (priv->rx_csum_enable)
369 rctrl |= RCTRL_CHECKSUMMING;
370
371 if (priv->extended_hash) {
372 rctrl |= RCTRL_EXTHASH;
373
374 gfar_clear_exact_match(ndev);
375 rctrl |= RCTRL_EMEN;
376 }
377
378 if (priv->padding) {
379 rctrl &= ~RCTRL_PAL_MASK;
380 rctrl |= RCTRL_PADDING(priv->padding);
381 }
382
Manfred Rudigiercc772ab2010-04-08 23:10:03 +0000383 /* Insert receive time stamps into padding alignment bytes */
384 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER) {
385 rctrl &= ~RCTRL_PAL_MASK;
Manfred Rudigier97553f72010-06-11 01:49:05 +0000386 rctrl |= RCTRL_PADDING(8);
Manfred Rudigiercc772ab2010-04-08 23:10:03 +0000387 priv->padding = 8;
388 }
389
Manfred Rudigier97553f72010-06-11 01:49:05 +0000390 /* Enable HW time stamping if requested from user space */
391 if (priv->hwts_rx_en)
392 rctrl |= RCTRL_PRSDEP_INIT | RCTRL_TS_ENABLE;
393
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000394 /* keep vlan related bits if it's enabled */
395 if (priv->vlgrp) {
396 rctrl |= RCTRL_VLEX | RCTRL_PRSDEP_INIT;
397 tctrl |= TCTRL_VLINS;
398 }
399
400 /* Init rctrl based on our settings */
401 gfar_write(&regs->rctrl, rctrl);
402
403 if (ndev->features & NETIF_F_IP_CSUM)
404 tctrl |= TCTRL_INIT_CSUM;
405
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000406 tctrl |= TCTRL_TXSCHED_PRIO;
407
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000408 gfar_write(&regs->tctrl, tctrl);
409
410 /* Set the extraction length and index */
411 attrs = ATTRELI_EL(priv->rx_stash_size) |
412 ATTRELI_EI(priv->rx_stash_index);
413
414 gfar_write(&regs->attreli, attrs);
415
416 /* Start with defaults, and add stashing or locking
417 * depending on the approprate variables */
418 attrs = ATTR_INIT_SETTINGS;
419
420 if (priv->bd_stash_en)
421 attrs |= ATTR_BDSTASH;
422
423 if (priv->rx_stash_size != 0)
424 attrs |= ATTR_BUFSTASH;
425
426 gfar_write(&regs->attr, attrs);
427
428 gfar_write(&regs->fifo_tx_thr, priv->fifo_threshold);
429 gfar_write(&regs->fifo_tx_starve, priv->fifo_starve);
430 gfar_write(&regs->fifo_tx_starve_shutoff, priv->fifo_starve_off);
431}
432
Sandeep Gopalpeta7f38042009-12-16 01:15:07 +0000433static struct net_device_stats *gfar_get_stats(struct net_device *dev)
434{
435 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpeta7f38042009-12-16 01:15:07 +0000436 unsigned long rx_packets = 0, rx_bytes = 0, rx_dropped = 0;
437 unsigned long tx_packets = 0, tx_bytes = 0;
438 int i = 0;
439
440 for (i = 0; i < priv->num_rx_queues; i++) {
441 rx_packets += priv->rx_queue[i]->stats.rx_packets;
442 rx_bytes += priv->rx_queue[i]->stats.rx_bytes;
443 rx_dropped += priv->rx_queue[i]->stats.rx_dropped;
444 }
445
446 dev->stats.rx_packets = rx_packets;
447 dev->stats.rx_bytes = rx_bytes;
448 dev->stats.rx_dropped = rx_dropped;
449
450 for (i = 0; i < priv->num_tx_queues; i++) {
Eric Dumazet1ac9ad12011-01-12 12:13:14 +0000451 tx_bytes += priv->tx_queue[i]->stats.tx_bytes;
452 tx_packets += priv->tx_queue[i]->stats.tx_packets;
Sandeep Gopalpeta7f38042009-12-16 01:15:07 +0000453 }
454
455 dev->stats.tx_bytes = tx_bytes;
456 dev->stats.tx_packets = tx_packets;
457
458 return &dev->stats;
459}
460
Andy Fleming26ccfc32009-03-10 12:58:28 +0000461static const struct net_device_ops gfar_netdev_ops = {
462 .ndo_open = gfar_enet_open,
463 .ndo_start_xmit = gfar_start_xmit,
464 .ndo_stop = gfar_close,
465 .ndo_change_mtu = gfar_change_mtu,
466 .ndo_set_multicast_list = gfar_set_multi,
467 .ndo_tx_timeout = gfar_timeout,
468 .ndo_do_ioctl = gfar_ioctl,
Sandeep Gopalpeta7f38042009-12-16 01:15:07 +0000469 .ndo_get_stats = gfar_get_stats,
Andy Fleming26ccfc32009-03-10 12:58:28 +0000470 .ndo_vlan_rx_register = gfar_vlan_rx_register,
Ben Hutchings240c1022009-07-09 17:54:35 +0000471 .ndo_set_mac_address = eth_mac_addr,
472 .ndo_validate_addr = eth_validate_addr,
Andy Fleming26ccfc32009-03-10 12:58:28 +0000473#ifdef CONFIG_NET_POLL_CONTROLLER
474 .ndo_poll_controller = gfar_netpoll,
475#endif
476};
477
Sandeep Gopalpet7a8b3372009-11-02 07:03:40 +0000478unsigned int ftp_rqfpr[MAX_FILER_IDX + 1];
479unsigned int ftp_rqfcr[MAX_FILER_IDX + 1];
480
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000481void lock_rx_qs(struct gfar_private *priv)
482{
483 int i = 0x0;
484
485 for (i = 0; i < priv->num_rx_queues; i++)
486 spin_lock(&priv->rx_queue[i]->rxlock);
487}
488
489void lock_tx_qs(struct gfar_private *priv)
490{
491 int i = 0x0;
492
493 for (i = 0; i < priv->num_tx_queues; i++)
494 spin_lock(&priv->tx_queue[i]->txlock);
495}
496
497void unlock_rx_qs(struct gfar_private *priv)
498{
499 int i = 0x0;
500
501 for (i = 0; i < priv->num_rx_queues; i++)
502 spin_unlock(&priv->rx_queue[i]->rxlock);
503}
504
505void unlock_tx_qs(struct gfar_private *priv)
506{
507 int i = 0x0;
508
509 for (i = 0; i < priv->num_tx_queues; i++)
510 spin_unlock(&priv->tx_queue[i]->txlock);
511}
512
Andy Fleming7f7f5312005-11-11 12:38:59 -0600513/* Returns 1 if incoming frames use an FCB */
514static inline int gfar_uses_fcb(struct gfar_private *priv)
Kumar Gala0bbaf062005-06-20 10:54:21 -0500515{
Manfred Rudigiercc772ab2010-04-08 23:10:03 +0000516 return priv->vlgrp || priv->rx_csum_enable ||
517 (priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER);
Kumar Gala0bbaf062005-06-20 10:54:21 -0500518}
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400519
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000520static void free_tx_pointers(struct gfar_private *priv)
521{
522 int i = 0;
523
524 for (i = 0; i < priv->num_tx_queues; i++)
525 kfree(priv->tx_queue[i]);
526}
527
528static void free_rx_pointers(struct gfar_private *priv)
529{
530 int i = 0;
531
532 for (i = 0; i < priv->num_rx_queues; i++)
533 kfree(priv->rx_queue[i]);
534}
535
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000536static void unmap_group_regs(struct gfar_private *priv)
537{
538 int i = 0;
539
540 for (i = 0; i < MAXGROUPS; i++)
541 if (priv->gfargrp[i].regs)
542 iounmap(priv->gfargrp[i].regs);
543}
544
545static void disable_napi(struct gfar_private *priv)
546{
547 int i = 0;
548
549 for (i = 0; i < priv->num_grps; i++)
550 napi_disable(&priv->gfargrp[i].napi);
551}
552
553static void enable_napi(struct gfar_private *priv)
554{
555 int i = 0;
556
557 for (i = 0; i < priv->num_grps; i++)
558 napi_enable(&priv->gfargrp[i].napi);
559}
560
561static int gfar_parse_group(struct device_node *np,
562 struct gfar_private *priv, const char *model)
563{
564 u32 *queue_mask;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000565
Anton Vorontsov7ce97d42010-04-23 07:12:44 +0000566 priv->gfargrp[priv->num_grps].regs = of_iomap(np, 0);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000567 if (!priv->gfargrp[priv->num_grps].regs)
568 return -ENOMEM;
569
570 priv->gfargrp[priv->num_grps].interruptTransmit =
571 irq_of_parse_and_map(np, 0);
572
573 /* If we aren't the FEC we have multiple interrupts */
574 if (model && strcasecmp(model, "FEC")) {
575 priv->gfargrp[priv->num_grps].interruptReceive =
576 irq_of_parse_and_map(np, 1);
577 priv->gfargrp[priv->num_grps].interruptError =
578 irq_of_parse_and_map(np,2);
Nicolas Kaiser28cb6cc2010-11-15 10:59:42 +0000579 if (priv->gfargrp[priv->num_grps].interruptTransmit == NO_IRQ ||
580 priv->gfargrp[priv->num_grps].interruptReceive == NO_IRQ ||
581 priv->gfargrp[priv->num_grps].interruptError == NO_IRQ)
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000582 return -EINVAL;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000583 }
584
585 priv->gfargrp[priv->num_grps].grp_id = priv->num_grps;
586 priv->gfargrp[priv->num_grps].priv = priv;
587 spin_lock_init(&priv->gfargrp[priv->num_grps].grplock);
588 if(priv->mode == MQ_MG_MODE) {
589 queue_mask = (u32 *)of_get_property(np,
590 "fsl,rx-bit-map", NULL);
591 priv->gfargrp[priv->num_grps].rx_bit_map =
592 queue_mask ? *queue_mask :(DEFAULT_MAPPING >> priv->num_grps);
593 queue_mask = (u32 *)of_get_property(np,
594 "fsl,tx-bit-map", NULL);
595 priv->gfargrp[priv->num_grps].tx_bit_map =
596 queue_mask ? *queue_mask : (DEFAULT_MAPPING >> priv->num_grps);
597 } else {
598 priv->gfargrp[priv->num_grps].rx_bit_map = 0xFF;
599 priv->gfargrp[priv->num_grps].tx_bit_map = 0xFF;
600 }
601 priv->num_grps++;
602
603 return 0;
604}
605
Grant Likely2dc11582010-08-06 09:25:50 -0600606static int gfar_of_init(struct platform_device *ofdev, struct net_device **pdev)
Andy Flemingb31a1d82008-12-16 15:29:15 -0800607{
Andy Flemingb31a1d82008-12-16 15:29:15 -0800608 const char *model;
609 const char *ctype;
610 const void *mac_addr;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000611 int err = 0, i;
612 struct net_device *dev = NULL;
613 struct gfar_private *priv = NULL;
Grant Likely61c7a082010-04-13 16:12:29 -0700614 struct device_node *np = ofdev->dev.of_node;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000615 struct device_node *child = NULL;
Andy Fleming4d7902f2009-02-04 16:43:44 -0800616 const u32 *stash;
617 const u32 *stash_len;
618 const u32 *stash_idx;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000619 unsigned int num_tx_qs, num_rx_qs;
620 u32 *tx_queues, *rx_queues;
Andy Flemingb31a1d82008-12-16 15:29:15 -0800621
622 if (!np || !of_device_is_available(np))
623 return -ENODEV;
624
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000625 /* parse the num of tx and rx queues */
626 tx_queues = (u32 *)of_get_property(np, "fsl,num_tx_queues", NULL);
627 num_tx_qs = tx_queues ? *tx_queues : 1;
628
629 if (num_tx_qs > MAX_TX_QS) {
630 printk(KERN_ERR "num_tx_qs(=%d) greater than MAX_TX_QS(=%d)\n",
631 num_tx_qs, MAX_TX_QS);
632 printk(KERN_ERR "Cannot do alloc_etherdev, aborting\n");
633 return -EINVAL;
634 }
635
636 rx_queues = (u32 *)of_get_property(np, "fsl,num_rx_queues", NULL);
637 num_rx_qs = rx_queues ? *rx_queues : 1;
638
639 if (num_rx_qs > MAX_RX_QS) {
640 printk(KERN_ERR "num_rx_qs(=%d) greater than MAX_RX_QS(=%d)\n",
641 num_tx_qs, MAX_TX_QS);
642 printk(KERN_ERR "Cannot do alloc_etherdev, aborting\n");
643 return -EINVAL;
644 }
645
646 *pdev = alloc_etherdev_mq(sizeof(*priv), num_tx_qs);
647 dev = *pdev;
648 if (NULL == dev)
649 return -ENOMEM;
650
651 priv = netdev_priv(dev);
Grant Likely61c7a082010-04-13 16:12:29 -0700652 priv->node = ofdev->dev.of_node;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000653 priv->ndev = dev;
654
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000655 priv->num_tx_queues = num_tx_qs;
Ben Hutchingsfe069122010-09-27 08:27:37 +0000656 netif_set_real_num_rx_queues(dev, num_rx_qs);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000657 priv->num_rx_queues = num_rx_qs;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000658 priv->num_grps = 0x0;
Andy Flemingb31a1d82008-12-16 15:29:15 -0800659
660 model = of_get_property(np, "model", NULL);
661
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000662 for (i = 0; i < MAXGROUPS; i++)
663 priv->gfargrp[i].regs = NULL;
Andy Flemingb31a1d82008-12-16 15:29:15 -0800664
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000665 /* Parse and initialize group specific information */
666 if (of_device_is_compatible(np, "fsl,etsec2")) {
667 priv->mode = MQ_MG_MODE;
668 for_each_child_of_node(np, child) {
669 err = gfar_parse_group(child, priv, model);
670 if (err)
671 goto err_grp_init;
Andy Flemingb31a1d82008-12-16 15:29:15 -0800672 }
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000673 } else {
674 priv->mode = SQ_SG_MODE;
675 err = gfar_parse_group(np, priv, model);
676 if(err)
677 goto err_grp_init;
Andy Flemingb31a1d82008-12-16 15:29:15 -0800678 }
679
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000680 for (i = 0; i < priv->num_tx_queues; i++)
681 priv->tx_queue[i] = NULL;
682 for (i = 0; i < priv->num_rx_queues; i++)
683 priv->rx_queue[i] = NULL;
684
685 for (i = 0; i < priv->num_tx_queues; i++) {
Joe Perchesde47f072010-05-31 17:23:12 +0000686 priv->tx_queue[i] = kzalloc(sizeof(struct gfar_priv_tx_q),
687 GFP_KERNEL);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000688 if (!priv->tx_queue[i]) {
689 err = -ENOMEM;
690 goto tx_alloc_failed;
691 }
692 priv->tx_queue[i]->tx_skbuff = NULL;
693 priv->tx_queue[i]->qindex = i;
694 priv->tx_queue[i]->dev = dev;
695 spin_lock_init(&(priv->tx_queue[i]->txlock));
696 }
697
698 for (i = 0; i < priv->num_rx_queues; i++) {
Joe Perchesde47f072010-05-31 17:23:12 +0000699 priv->rx_queue[i] = kzalloc(sizeof(struct gfar_priv_rx_q),
700 GFP_KERNEL);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000701 if (!priv->rx_queue[i]) {
702 err = -ENOMEM;
703 goto rx_alloc_failed;
704 }
705 priv->rx_queue[i]->rx_skbuff = NULL;
706 priv->rx_queue[i]->qindex = i;
707 priv->rx_queue[i]->dev = dev;
708 spin_lock_init(&(priv->rx_queue[i]->rxlock));
709 }
710
711
Andy Fleming4d7902f2009-02-04 16:43:44 -0800712 stash = of_get_property(np, "bd-stash", NULL);
713
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +0000714 if (stash) {
Andy Fleming4d7902f2009-02-04 16:43:44 -0800715 priv->device_flags |= FSL_GIANFAR_DEV_HAS_BD_STASHING;
716 priv->bd_stash_en = 1;
717 }
718
719 stash_len = of_get_property(np, "rx-stash-len", NULL);
720
721 if (stash_len)
722 priv->rx_stash_size = *stash_len;
723
724 stash_idx = of_get_property(np, "rx-stash-idx", NULL);
725
726 if (stash_idx)
727 priv->rx_stash_index = *stash_idx;
728
729 if (stash_len || stash_idx)
730 priv->device_flags |= FSL_GIANFAR_DEV_HAS_BUF_STASHING;
731
Andy Flemingb31a1d82008-12-16 15:29:15 -0800732 mac_addr = of_get_mac_address(np);
733 if (mac_addr)
734 memcpy(dev->dev_addr, mac_addr, MAC_ADDR_LEN);
735
736 if (model && !strcasecmp(model, "TSEC"))
737 priv->device_flags =
738 FSL_GIANFAR_DEV_HAS_GIGABIT |
739 FSL_GIANFAR_DEV_HAS_COALESCE |
740 FSL_GIANFAR_DEV_HAS_RMON |
741 FSL_GIANFAR_DEV_HAS_MULTI_INTR;
742 if (model && !strcasecmp(model, "eTSEC"))
743 priv->device_flags =
744 FSL_GIANFAR_DEV_HAS_GIGABIT |
745 FSL_GIANFAR_DEV_HAS_COALESCE |
746 FSL_GIANFAR_DEV_HAS_RMON |
747 FSL_GIANFAR_DEV_HAS_MULTI_INTR |
Dai Haruki2c2db482008-12-16 15:31:15 -0800748 FSL_GIANFAR_DEV_HAS_PADDING |
Andy Flemingb31a1d82008-12-16 15:29:15 -0800749 FSL_GIANFAR_DEV_HAS_CSUM |
750 FSL_GIANFAR_DEV_HAS_VLAN |
751 FSL_GIANFAR_DEV_HAS_MAGIC_PACKET |
Manfred Rudigier97553f72010-06-11 01:49:05 +0000752 FSL_GIANFAR_DEV_HAS_EXTENDED_HASH |
753 FSL_GIANFAR_DEV_HAS_TIMER;
Andy Flemingb31a1d82008-12-16 15:29:15 -0800754
755 ctype = of_get_property(np, "phy-connection-type", NULL);
756
757 /* We only care about rgmii-id. The rest are autodetected */
758 if (ctype && !strcmp(ctype, "rgmii-id"))
759 priv->interface = PHY_INTERFACE_MODE_RGMII_ID;
760 else
761 priv->interface = PHY_INTERFACE_MODE_MII;
762
763 if (of_get_property(np, "fsl,magic-packet", NULL))
764 priv->device_flags |= FSL_GIANFAR_DEV_HAS_MAGIC_PACKET;
765
Grant Likelyfe192a42009-04-25 12:53:12 +0000766 priv->phy_node = of_parse_phandle(np, "phy-handle", 0);
Andy Flemingb31a1d82008-12-16 15:29:15 -0800767
768 /* Find the TBI PHY. If it's not there, we don't support SGMII */
Grant Likelyfe192a42009-04-25 12:53:12 +0000769 priv->tbi_node = of_parse_phandle(np, "tbi-handle", 0);
Andy Flemingb31a1d82008-12-16 15:29:15 -0800770
771 return 0;
772
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000773rx_alloc_failed:
774 free_rx_pointers(priv);
775tx_alloc_failed:
776 free_tx_pointers(priv);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000777err_grp_init:
778 unmap_group_regs(priv);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000779 free_netdev(dev);
Andy Flemingb31a1d82008-12-16 15:29:15 -0800780 return err;
781}
782
Manfred Rudigiercc772ab2010-04-08 23:10:03 +0000783static int gfar_hwtstamp_ioctl(struct net_device *netdev,
784 struct ifreq *ifr, int cmd)
785{
786 struct hwtstamp_config config;
787 struct gfar_private *priv = netdev_priv(netdev);
788
789 if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
790 return -EFAULT;
791
792 /* reserved for future extensions */
793 if (config.flags)
794 return -EINVAL;
795
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +0000796 switch (config.tx_type) {
797 case HWTSTAMP_TX_OFF:
798 priv->hwts_tx_en = 0;
799 break;
800 case HWTSTAMP_TX_ON:
801 if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER))
802 return -ERANGE;
803 priv->hwts_tx_en = 1;
804 break;
805 default:
Manfred Rudigiercc772ab2010-04-08 23:10:03 +0000806 return -ERANGE;
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +0000807 }
Manfred Rudigiercc772ab2010-04-08 23:10:03 +0000808
809 switch (config.rx_filter) {
810 case HWTSTAMP_FILTER_NONE:
Manfred Rudigier97553f72010-06-11 01:49:05 +0000811 if (priv->hwts_rx_en) {
812 stop_gfar(netdev);
813 priv->hwts_rx_en = 0;
814 startup_gfar(netdev);
815 }
Manfred Rudigiercc772ab2010-04-08 23:10:03 +0000816 break;
817 default:
818 if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER))
819 return -ERANGE;
Manfred Rudigier97553f72010-06-11 01:49:05 +0000820 if (!priv->hwts_rx_en) {
821 stop_gfar(netdev);
822 priv->hwts_rx_en = 1;
823 startup_gfar(netdev);
824 }
Manfred Rudigiercc772ab2010-04-08 23:10:03 +0000825 config.rx_filter = HWTSTAMP_FILTER_ALL;
826 break;
827 }
828
829 return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ?
830 -EFAULT : 0;
831}
832
Clifford Wolf0faac9f2009-01-09 10:23:11 +0000833/* Ioctl MII Interface */
834static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
835{
836 struct gfar_private *priv = netdev_priv(dev);
837
838 if (!netif_running(dev))
839 return -EINVAL;
840
Manfred Rudigiercc772ab2010-04-08 23:10:03 +0000841 if (cmd == SIOCSHWTSTAMP)
842 return gfar_hwtstamp_ioctl(dev, rq, cmd);
843
Clifford Wolf0faac9f2009-01-09 10:23:11 +0000844 if (!priv->phydev)
845 return -ENODEV;
846
Richard Cochran28b04112010-07-17 08:48:55 +0000847 return phy_mii_ioctl(priv->phydev, rq, cmd);
Clifford Wolf0faac9f2009-01-09 10:23:11 +0000848}
849
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000850static unsigned int reverse_bitmap(unsigned int bit_map, unsigned int max_qs)
851{
852 unsigned int new_bit_map = 0x0;
853 int mask = 0x1 << (max_qs - 1), i;
854 for (i = 0; i < max_qs; i++) {
855 if (bit_map & mask)
856 new_bit_map = new_bit_map + (1 << i);
857 mask = mask >> 0x1;
858 }
859 return new_bit_map;
860}
Sandeep Gopalpet7a8b3372009-11-02 07:03:40 +0000861
Anton Vorontsov18294ad2009-11-04 12:53:00 +0000862static u32 cluster_entry_per_class(struct gfar_private *priv, u32 rqfar,
863 u32 class)
Sandeep Gopalpet7a8b3372009-11-02 07:03:40 +0000864{
865 u32 rqfpr = FPR_FILER_MASK;
866 u32 rqfcr = 0x0;
867
868 rqfar--;
869 rqfcr = RQFCR_CLE | RQFCR_PID_MASK | RQFCR_CMP_EXACT;
870 ftp_rqfpr[rqfar] = rqfpr;
871 ftp_rqfcr[rqfar] = rqfcr;
872 gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
873
874 rqfar--;
875 rqfcr = RQFCR_CMP_NOMATCH;
876 ftp_rqfpr[rqfar] = rqfpr;
877 ftp_rqfcr[rqfar] = rqfcr;
878 gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
879
880 rqfar--;
881 rqfcr = RQFCR_CMP_EXACT | RQFCR_PID_PARSE | RQFCR_CLE | RQFCR_AND;
882 rqfpr = class;
883 ftp_rqfcr[rqfar] = rqfcr;
884 ftp_rqfpr[rqfar] = rqfpr;
885 gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
886
887 rqfar--;
888 rqfcr = RQFCR_CMP_EXACT | RQFCR_PID_MASK | RQFCR_AND;
889 rqfpr = class;
890 ftp_rqfcr[rqfar] = rqfcr;
891 ftp_rqfpr[rqfar] = rqfpr;
892 gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
893
894 return rqfar;
895}
896
897static void gfar_init_filer_table(struct gfar_private *priv)
898{
899 int i = 0x0;
900 u32 rqfar = MAX_FILER_IDX;
901 u32 rqfcr = 0x0;
902 u32 rqfpr = FPR_FILER_MASK;
903
904 /* Default rule */
905 rqfcr = RQFCR_CMP_MATCH;
906 ftp_rqfcr[rqfar] = rqfcr;
907 ftp_rqfpr[rqfar] = rqfpr;
908 gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
909
910 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6);
911 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6 | RQFPR_UDP);
912 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6 | RQFPR_TCP);
913 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4);
914 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4 | RQFPR_UDP);
915 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4 | RQFPR_TCP);
916
Uwe Kleine-König85dd08e2010-06-11 12:16:55 +0200917 /* cur_filer_idx indicated the first non-masked rule */
Sandeep Gopalpet7a8b3372009-11-02 07:03:40 +0000918 priv->cur_filer_idx = rqfar;
919
920 /* Rest are masked rules */
921 rqfcr = RQFCR_CMP_NOMATCH;
922 for (i = 0; i < rqfar; i++) {
923 ftp_rqfcr[i] = rqfcr;
924 ftp_rqfpr[i] = rqfpr;
925 gfar_write_filer(priv, i, rqfcr, rqfpr);
926 }
927}
928
Anton Vorontsov7d350972010-06-30 06:39:12 +0000929static void gfar_detect_errata(struct gfar_private *priv)
930{
931 struct device *dev = &priv->ofdev->dev;
932 unsigned int pvr = mfspr(SPRN_PVR);
933 unsigned int svr = mfspr(SPRN_SVR);
934 unsigned int mod = (svr >> 16) & 0xfff6; /* w/o E suffix */
935 unsigned int rev = svr & 0xffff;
936
937 /* MPC8313 Rev 2.0 and higher; All MPC837x */
938 if ((pvr == 0x80850010 && mod == 0x80b0 && rev >= 0x0020) ||
939 (pvr == 0x80861010 && (mod & 0xfff9) == 0x80c0))
940 priv->errata |= GFAR_ERRATA_74;
941
Anton Vorontsovdeb90ea2010-06-30 06:39:13 +0000942 /* MPC8313 and MPC837x all rev */
943 if ((pvr == 0x80850010 && mod == 0x80b0) ||
944 (pvr == 0x80861010 && (mod & 0xfff9) == 0x80c0))
945 priv->errata |= GFAR_ERRATA_76;
946
Anton Vorontsov511d9342010-06-30 06:39:15 +0000947 /* MPC8313 and MPC837x all rev */
948 if ((pvr == 0x80850010 && mod == 0x80b0) ||
949 (pvr == 0x80861010 && (mod & 0xfff9) == 0x80c0))
950 priv->errata |= GFAR_ERRATA_A002;
951
Anton Vorontsov7d350972010-06-30 06:39:12 +0000952 if (priv->errata)
953 dev_info(dev, "enabled errata workarounds, flags: 0x%x\n",
954 priv->errata);
955}
956
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400957/* Set up the ethernet device structure, private data,
958 * and anything else we need before we start */
Grant Likely2dc11582010-08-06 09:25:50 -0600959static int gfar_probe(struct platform_device *ofdev,
Andy Flemingb31a1d82008-12-16 15:29:15 -0800960 const struct of_device_id *match)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961{
962 u32 tempval;
963 struct net_device *dev = NULL;
964 struct gfar_private *priv = NULL;
Sandeep Gopalpetf4983702009-11-02 07:03:09 +0000965 struct gfar __iomem *regs = NULL;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000966 int err = 0, i, grp_idx = 0;
Dai Harukic50a5d92008-12-17 16:51:32 -0800967 int len_devname;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000968 u32 rstat = 0, tstat = 0, rqueue = 0, tqueue = 0;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000969 u32 isrg = 0;
Anton Vorontsov18294ad2009-11-04 12:53:00 +0000970 u32 __iomem *baddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000972 err = gfar_of_init(ofdev, &dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000974 if (err)
975 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976
977 priv = netdev_priv(dev);
Kumar Gala48268572009-03-18 23:28:22 -0700978 priv->ndev = dev;
979 priv->ofdev = ofdev;
Grant Likely61c7a082010-04-13 16:12:29 -0700980 priv->node = ofdev->dev.of_node;
Kumar Gala48268572009-03-18 23:28:22 -0700981 SET_NETDEV_DEV(dev, &ofdev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982
Scott Woodd87eb122008-07-11 18:04:45 -0500983 spin_lock_init(&priv->bflock);
Sebastian Siewiorab939902008-08-19 21:12:45 +0200984 INIT_WORK(&priv->reset_task, gfar_reset_task);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985
Andy Flemingb31a1d82008-12-16 15:29:15 -0800986 dev_set_drvdata(&ofdev->dev, priv);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000987 regs = priv->gfargrp[0].regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988
Anton Vorontsov7d350972010-06-30 06:39:12 +0000989 gfar_detect_errata(priv);
990
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 /* Stop the DMA engine now, in case it was running before */
992 /* (The firmware could have used it, and left it running). */
Andy Fleming257d9382008-12-16 15:25:45 -0800993 gfar_halt(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994
995 /* Reset MAC layer */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +0000996 gfar_write(&regs->maccfg1, MACCFG1_SOFT_RESET);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997
Andy Flemingb98ac702009-02-04 16:38:05 -0800998 /* We need to delay at least 3 TX clocks */
999 udelay(2);
1000
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001 tempval = (MACCFG1_TX_FLOW | MACCFG1_RX_FLOW);
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001002 gfar_write(&regs->maccfg1, tempval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003
1004 /* Initialize MACCFG2. */
Anton Vorontsov7d350972010-06-30 06:39:12 +00001005 tempval = MACCFG2_INIT_SETTINGS;
1006 if (gfar_has_errata(priv, GFAR_ERRATA_74))
1007 tempval |= MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK;
1008 gfar_write(&regs->maccfg2, tempval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009
1010 /* Initialize ECNTRL */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001011 gfar_write(&regs->ecntrl, ECNTRL_INIT_SETTINGS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013 /* Set the dev->base_addr to the gfar reg region */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001014 dev->base_addr = (unsigned long) regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001015
Andy Flemingb31a1d82008-12-16 15:29:15 -08001016 SET_NETDEV_DEV(dev, &ofdev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017
1018 /* Fill in the dev structure */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019 dev->watchdog_timeo = TX_TIMEOUT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020 dev->mtu = 1500;
Andy Fleming26ccfc32009-03-10 12:58:28 +00001021 dev->netdev_ops = &gfar_netdev_ops;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001022 dev->ethtool_ops = &gfar_ethtool_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001024 /* Register for napi ...We are registering NAPI for each grp */
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001025 for (i = 0; i < priv->num_grps; i++)
1026 netif_napi_add(dev, &priv->gfargrp[i].napi, gfar_poll, GFAR_DEV_WEIGHT);
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001027
Andy Flemingb31a1d82008-12-16 15:29:15 -08001028 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_CSUM) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05001029 priv->rx_csum_enable = 1;
Dai Haruki4669bc92008-12-17 16:51:04 -08001030 dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001031 } else
1032 priv->rx_csum_enable = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033
Kumar Gala0bbaf062005-06-20 10:54:21 -05001034 priv->vlgrp = NULL;
1035
Andy Fleming26ccfc32009-03-10 12:58:28 +00001036 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_VLAN)
Kumar Gala0bbaf062005-06-20 10:54:21 -05001037 dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001038
Andy Flemingb31a1d82008-12-16 15:29:15 -08001039 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_EXTENDED_HASH) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05001040 priv->extended_hash = 1;
1041 priv->hash_width = 9;
1042
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001043 priv->hash_regs[0] = &regs->igaddr0;
1044 priv->hash_regs[1] = &regs->igaddr1;
1045 priv->hash_regs[2] = &regs->igaddr2;
1046 priv->hash_regs[3] = &regs->igaddr3;
1047 priv->hash_regs[4] = &regs->igaddr4;
1048 priv->hash_regs[5] = &regs->igaddr5;
1049 priv->hash_regs[6] = &regs->igaddr6;
1050 priv->hash_regs[7] = &regs->igaddr7;
1051 priv->hash_regs[8] = &regs->gaddr0;
1052 priv->hash_regs[9] = &regs->gaddr1;
1053 priv->hash_regs[10] = &regs->gaddr2;
1054 priv->hash_regs[11] = &regs->gaddr3;
1055 priv->hash_regs[12] = &regs->gaddr4;
1056 priv->hash_regs[13] = &regs->gaddr5;
1057 priv->hash_regs[14] = &regs->gaddr6;
1058 priv->hash_regs[15] = &regs->gaddr7;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001059
1060 } else {
1061 priv->extended_hash = 0;
1062 priv->hash_width = 8;
1063
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001064 priv->hash_regs[0] = &regs->gaddr0;
1065 priv->hash_regs[1] = &regs->gaddr1;
1066 priv->hash_regs[2] = &regs->gaddr2;
1067 priv->hash_regs[3] = &regs->gaddr3;
1068 priv->hash_regs[4] = &regs->gaddr4;
1069 priv->hash_regs[5] = &regs->gaddr5;
1070 priv->hash_regs[6] = &regs->gaddr6;
1071 priv->hash_regs[7] = &regs->gaddr7;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001072 }
1073
Andy Flemingb31a1d82008-12-16 15:29:15 -08001074 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_PADDING)
Kumar Gala0bbaf062005-06-20 10:54:21 -05001075 priv->padding = DEFAULT_PADDING;
1076 else
1077 priv->padding = 0;
1078
Manfred Rudigiercc772ab2010-04-08 23:10:03 +00001079 if (dev->features & NETIF_F_IP_CSUM ||
1080 priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER)
Kumar Gala0bbaf062005-06-20 10:54:21 -05001081 dev->hard_header_len += GMAC_FCB_LEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001083 /* Program the isrg regs only if number of grps > 1 */
1084 if (priv->num_grps > 1) {
1085 baddr = &regs->isrg0;
1086 for (i = 0; i < priv->num_grps; i++) {
1087 isrg |= (priv->gfargrp[i].rx_bit_map << ISRG_SHIFT_RX);
1088 isrg |= (priv->gfargrp[i].tx_bit_map << ISRG_SHIFT_TX);
1089 gfar_write(baddr, isrg);
1090 baddr++;
1091 isrg = 0x0;
1092 }
1093 }
1094
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001095 /* Need to reverse the bit maps as bit_map's MSB is q0
Akinobu Mita984b3f52010-03-05 13:41:37 -08001096 * but, for_each_set_bit parses from right to left, which
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001097 * basically reverses the queue numbers */
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001098 for (i = 0; i< priv->num_grps; i++) {
1099 priv->gfargrp[i].tx_bit_map = reverse_bitmap(
1100 priv->gfargrp[i].tx_bit_map, MAX_TX_QS);
1101 priv->gfargrp[i].rx_bit_map = reverse_bitmap(
1102 priv->gfargrp[i].rx_bit_map, MAX_RX_QS);
1103 }
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001104
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001105 /* Calculate RSTAT, TSTAT, RQUEUE and TQUEUE values,
1106 * also assign queues to groups */
1107 for (grp_idx = 0; grp_idx < priv->num_grps; grp_idx++) {
1108 priv->gfargrp[grp_idx].num_rx_queues = 0x0;
Akinobu Mita984b3f52010-03-05 13:41:37 -08001109 for_each_set_bit(i, &priv->gfargrp[grp_idx].rx_bit_map,
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001110 priv->num_rx_queues) {
1111 priv->gfargrp[grp_idx].num_rx_queues++;
1112 priv->rx_queue[i]->grp = &priv->gfargrp[grp_idx];
1113 rstat = rstat | (RSTAT_CLEAR_RHALT >> i);
1114 rqueue = rqueue | ((RQUEUE_EN0 | RQUEUE_EX0) >> i);
1115 }
1116 priv->gfargrp[grp_idx].num_tx_queues = 0x0;
Akinobu Mita984b3f52010-03-05 13:41:37 -08001117 for_each_set_bit(i, &priv->gfargrp[grp_idx].tx_bit_map,
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001118 priv->num_tx_queues) {
1119 priv->gfargrp[grp_idx].num_tx_queues++;
1120 priv->tx_queue[i]->grp = &priv->gfargrp[grp_idx];
1121 tstat = tstat | (TSTAT_CLEAR_THALT >> i);
1122 tqueue = tqueue | (TQUEUE_EN0 >> i);
1123 }
1124 priv->gfargrp[grp_idx].rstat = rstat;
1125 priv->gfargrp[grp_idx].tstat = tstat;
1126 rstat = tstat =0;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001127 }
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001128
1129 gfar_write(&regs->rqueue, rqueue);
1130 gfar_write(&regs->tqueue, tqueue);
1131
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132 priv->rx_buffer_size = DEFAULT_RX_BUFFER_SIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001134 /* Initializing some of the rx/tx queue level parameters */
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001135 for (i = 0; i < priv->num_tx_queues; i++) {
1136 priv->tx_queue[i]->tx_ring_size = DEFAULT_TX_RING_SIZE;
1137 priv->tx_queue[i]->num_txbdfree = DEFAULT_TX_RING_SIZE;
1138 priv->tx_queue[i]->txcoalescing = DEFAULT_TX_COALESCE;
1139 priv->tx_queue[i]->txic = DEFAULT_TXIC;
1140 }
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001141
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001142 for (i = 0; i < priv->num_rx_queues; i++) {
1143 priv->rx_queue[i]->rx_ring_size = DEFAULT_RX_RING_SIZE;
1144 priv->rx_queue[i]->rxcoalescing = DEFAULT_RX_COALESCE;
1145 priv->rx_queue[i]->rxic = DEFAULT_RXIC;
1146 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147
Sandeep Gopalpet1ccb8382009-12-16 01:14:58 +00001148 /* enable filer if using multiple RX queues*/
1149 if(priv->num_rx_queues > 1)
1150 priv->rx_filer_enable = 1;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001151 /* Enable most messages by default */
1152 priv->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
1153
Trent Piephod3eab822008-10-02 11:12:24 +00001154 /* Carrier starts down, phylib will bring it up */
1155 netif_carrier_off(dev);
1156
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157 err = register_netdev(dev);
1158
1159 if (err) {
1160 printk(KERN_ERR "%s: Cannot register net device, aborting.\n",
1161 dev->name);
1162 goto register_fail;
1163 }
1164
Anton Vorontsov2884e5c2009-02-01 00:52:34 -08001165 device_init_wakeup(&dev->dev,
1166 priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET);
1167
Dai Harukic50a5d92008-12-17 16:51:32 -08001168 /* fill out IRQ number and name fields */
1169 len_devname = strlen(dev->name);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001170 for (i = 0; i < priv->num_grps; i++) {
1171 strncpy(&priv->gfargrp[i].int_name_tx[0], dev->name,
1172 len_devname);
1173 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
1174 strncpy(&priv->gfargrp[i].int_name_tx[len_devname],
1175 "_g", sizeof("_g"));
1176 priv->gfargrp[i].int_name_tx[
1177 strlen(priv->gfargrp[i].int_name_tx)] = i+48;
1178 strncpy(&priv->gfargrp[i].int_name_tx[strlen(
1179 priv->gfargrp[i].int_name_tx)],
1180 "_tx", sizeof("_tx") + 1);
Dai Harukic50a5d92008-12-17 16:51:32 -08001181
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001182 strncpy(&priv->gfargrp[i].int_name_rx[0], dev->name,
1183 len_devname);
1184 strncpy(&priv->gfargrp[i].int_name_rx[len_devname],
1185 "_g", sizeof("_g"));
1186 priv->gfargrp[i].int_name_rx[
1187 strlen(priv->gfargrp[i].int_name_rx)] = i+48;
1188 strncpy(&priv->gfargrp[i].int_name_rx[strlen(
1189 priv->gfargrp[i].int_name_rx)],
1190 "_rx", sizeof("_rx") + 1);
Dai Harukic50a5d92008-12-17 16:51:32 -08001191
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001192 strncpy(&priv->gfargrp[i].int_name_er[0], dev->name,
1193 len_devname);
1194 strncpy(&priv->gfargrp[i].int_name_er[len_devname],
1195 "_g", sizeof("_g"));
1196 priv->gfargrp[i].int_name_er[strlen(
1197 priv->gfargrp[i].int_name_er)] = i+48;
1198 strncpy(&priv->gfargrp[i].int_name_er[strlen(\
1199 priv->gfargrp[i].int_name_er)],
1200 "_er", sizeof("_er") + 1);
1201 } else
1202 priv->gfargrp[i].int_name_tx[len_devname] = '\0';
1203 }
Dai Harukic50a5d92008-12-17 16:51:32 -08001204
Sandeep Gopalpet7a8b3372009-11-02 07:03:40 +00001205 /* Initialize the filer table */
1206 gfar_init_filer_table(priv);
1207
Andy Fleming7f7f5312005-11-11 12:38:59 -06001208 /* Create all the sysfs files */
1209 gfar_init_sysfs(dev);
1210
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211 /* Print out the device info */
Johannes Berge1749612008-10-27 15:59:26 -07001212 printk(KERN_INFO DEVICE_NAME "%pM\n", dev->name, dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213
1214 /* Even more device info helps when determining which kernel */
Andy Fleming7f7f5312005-11-11 12:38:59 -06001215 /* provided which set of benchmarks. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216 printk(KERN_INFO "%s: Running with NAPI enabled\n", dev->name);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001217 for (i = 0; i < priv->num_rx_queues; i++)
Kim Phillipsddc01b32010-03-30 11:54:22 +00001218 printk(KERN_INFO "%s: RX BD ring size for Q[%d]: %d\n",
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001219 dev->name, i, priv->rx_queue[i]->rx_ring_size);
1220 for(i = 0; i < priv->num_tx_queues; i++)
Kim Phillipsddc01b32010-03-30 11:54:22 +00001221 printk(KERN_INFO "%s: TX BD ring size for Q[%d]: %d\n",
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001222 dev->name, i, priv->tx_queue[i]->tx_ring_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223
1224 return 0;
1225
1226register_fail:
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001227 unmap_group_regs(priv);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001228 free_tx_pointers(priv);
1229 free_rx_pointers(priv);
Grant Likelyfe192a42009-04-25 12:53:12 +00001230 if (priv->phy_node)
1231 of_node_put(priv->phy_node);
1232 if (priv->tbi_node)
1233 of_node_put(priv->tbi_node);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 free_netdev(dev);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001235 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236}
1237
Grant Likely2dc11582010-08-06 09:25:50 -06001238static int gfar_remove(struct platform_device *ofdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239{
Andy Flemingb31a1d82008-12-16 15:29:15 -08001240 struct gfar_private *priv = dev_get_drvdata(&ofdev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241
Grant Likelyfe192a42009-04-25 12:53:12 +00001242 if (priv->phy_node)
1243 of_node_put(priv->phy_node);
1244 if (priv->tbi_node)
1245 of_node_put(priv->tbi_node);
1246
Andy Flemingb31a1d82008-12-16 15:29:15 -08001247 dev_set_drvdata(&ofdev->dev, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248
David S. Millerd9d8e042009-09-06 01:41:02 -07001249 unregister_netdev(priv->ndev);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001250 unmap_group_regs(priv);
Kumar Gala48268572009-03-18 23:28:22 -07001251 free_netdev(priv->ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252
1253 return 0;
1254}
1255
Scott Woodd87eb122008-07-11 18:04:45 -05001256#ifdef CONFIG_PM
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001257
1258static int gfar_suspend(struct device *dev)
Scott Woodd87eb122008-07-11 18:04:45 -05001259{
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001260 struct gfar_private *priv = dev_get_drvdata(dev);
1261 struct net_device *ndev = priv->ndev;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001262 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Scott Woodd87eb122008-07-11 18:04:45 -05001263 unsigned long flags;
1264 u32 tempval;
1265
1266 int magic_packet = priv->wol_en &&
Andy Flemingb31a1d82008-12-16 15:29:15 -08001267 (priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET);
Scott Woodd87eb122008-07-11 18:04:45 -05001268
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001269 netif_device_detach(ndev);
Scott Woodd87eb122008-07-11 18:04:45 -05001270
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001271 if (netif_running(ndev)) {
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001272
1273 local_irq_save(flags);
1274 lock_tx_qs(priv);
1275 lock_rx_qs(priv);
Scott Woodd87eb122008-07-11 18:04:45 -05001276
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001277 gfar_halt_nodisable(ndev);
Scott Woodd87eb122008-07-11 18:04:45 -05001278
1279 /* Disable Tx, and Rx if wake-on-LAN is disabled. */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001280 tempval = gfar_read(&regs->maccfg1);
Scott Woodd87eb122008-07-11 18:04:45 -05001281
1282 tempval &= ~MACCFG1_TX_EN;
1283
1284 if (!magic_packet)
1285 tempval &= ~MACCFG1_RX_EN;
1286
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001287 gfar_write(&regs->maccfg1, tempval);
Scott Woodd87eb122008-07-11 18:04:45 -05001288
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001289 unlock_rx_qs(priv);
1290 unlock_tx_qs(priv);
1291 local_irq_restore(flags);
Scott Woodd87eb122008-07-11 18:04:45 -05001292
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001293 disable_napi(priv);
Scott Woodd87eb122008-07-11 18:04:45 -05001294
1295 if (magic_packet) {
1296 /* Enable interrupt on Magic Packet */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001297 gfar_write(&regs->imask, IMASK_MAG);
Scott Woodd87eb122008-07-11 18:04:45 -05001298
1299 /* Enable Magic Packet mode */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001300 tempval = gfar_read(&regs->maccfg2);
Scott Woodd87eb122008-07-11 18:04:45 -05001301 tempval |= MACCFG2_MPEN;
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001302 gfar_write(&regs->maccfg2, tempval);
Scott Woodd87eb122008-07-11 18:04:45 -05001303 } else {
1304 phy_stop(priv->phydev);
1305 }
1306 }
1307
1308 return 0;
1309}
1310
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001311static int gfar_resume(struct device *dev)
Scott Woodd87eb122008-07-11 18:04:45 -05001312{
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001313 struct gfar_private *priv = dev_get_drvdata(dev);
1314 struct net_device *ndev = priv->ndev;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001315 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Scott Woodd87eb122008-07-11 18:04:45 -05001316 unsigned long flags;
1317 u32 tempval;
1318 int magic_packet = priv->wol_en &&
Andy Flemingb31a1d82008-12-16 15:29:15 -08001319 (priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET);
Scott Woodd87eb122008-07-11 18:04:45 -05001320
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001321 if (!netif_running(ndev)) {
1322 netif_device_attach(ndev);
Scott Woodd87eb122008-07-11 18:04:45 -05001323 return 0;
1324 }
1325
1326 if (!magic_packet && priv->phydev)
1327 phy_start(priv->phydev);
1328
1329 /* Disable Magic Packet mode, in case something
1330 * else woke us up.
1331 */
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001332 local_irq_save(flags);
1333 lock_tx_qs(priv);
1334 lock_rx_qs(priv);
Scott Woodd87eb122008-07-11 18:04:45 -05001335
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001336 tempval = gfar_read(&regs->maccfg2);
Scott Woodd87eb122008-07-11 18:04:45 -05001337 tempval &= ~MACCFG2_MPEN;
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001338 gfar_write(&regs->maccfg2, tempval);
Scott Woodd87eb122008-07-11 18:04:45 -05001339
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001340 gfar_start(ndev);
Scott Woodd87eb122008-07-11 18:04:45 -05001341
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001342 unlock_rx_qs(priv);
1343 unlock_tx_qs(priv);
1344 local_irq_restore(flags);
Scott Woodd87eb122008-07-11 18:04:45 -05001345
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001346 netif_device_attach(ndev);
Scott Woodd87eb122008-07-11 18:04:45 -05001347
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001348 enable_napi(priv);
Scott Woodd87eb122008-07-11 18:04:45 -05001349
1350 return 0;
1351}
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001352
1353static int gfar_restore(struct device *dev)
1354{
1355 struct gfar_private *priv = dev_get_drvdata(dev);
1356 struct net_device *ndev = priv->ndev;
1357
1358 if (!netif_running(ndev))
1359 return 0;
1360
1361 gfar_init_bds(ndev);
1362 init_registers(ndev);
1363 gfar_set_mac_address(ndev);
1364 gfar_init_mac(ndev);
1365 gfar_start(ndev);
1366
1367 priv->oldlink = 0;
1368 priv->oldspeed = 0;
1369 priv->oldduplex = -1;
1370
1371 if (priv->phydev)
1372 phy_start(priv->phydev);
1373
1374 netif_device_attach(ndev);
Anton Vorontsov5ea681d2009-11-10 14:11:05 +00001375 enable_napi(priv);
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001376
1377 return 0;
1378}
1379
1380static struct dev_pm_ops gfar_pm_ops = {
1381 .suspend = gfar_suspend,
1382 .resume = gfar_resume,
1383 .freeze = gfar_suspend,
1384 .thaw = gfar_resume,
1385 .restore = gfar_restore,
1386};
1387
1388#define GFAR_PM_OPS (&gfar_pm_ops)
1389
Scott Woodd87eb122008-07-11 18:04:45 -05001390#else
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001391
1392#define GFAR_PM_OPS NULL
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001393
Scott Woodd87eb122008-07-11 18:04:45 -05001394#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395
Andy Fleminge8a2b6a2006-12-01 12:01:06 -06001396/* Reads the controller's registers to determine what interface
1397 * connects it to the PHY.
1398 */
1399static phy_interface_t gfar_get_interface(struct net_device *dev)
1400{
1401 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001402 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001403 u32 ecntrl;
1404
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001405 ecntrl = gfar_read(&regs->ecntrl);
Andy Fleminge8a2b6a2006-12-01 12:01:06 -06001406
1407 if (ecntrl & ECNTRL_SGMII_MODE)
1408 return PHY_INTERFACE_MODE_SGMII;
1409
1410 if (ecntrl & ECNTRL_TBI_MODE) {
1411 if (ecntrl & ECNTRL_REDUCED_MODE)
1412 return PHY_INTERFACE_MODE_RTBI;
1413 else
1414 return PHY_INTERFACE_MODE_TBI;
1415 }
1416
1417 if (ecntrl & ECNTRL_REDUCED_MODE) {
1418 if (ecntrl & ECNTRL_REDUCED_MII_MODE)
1419 return PHY_INTERFACE_MODE_RMII;
Andy Fleming7132ab72007-07-11 11:43:07 -05001420 else {
Andy Flemingb31a1d82008-12-16 15:29:15 -08001421 phy_interface_t interface = priv->interface;
Andy Fleming7132ab72007-07-11 11:43:07 -05001422
1423 /*
1424 * This isn't autodetected right now, so it must
1425 * be set by the device tree or platform code.
1426 */
1427 if (interface == PHY_INTERFACE_MODE_RGMII_ID)
1428 return PHY_INTERFACE_MODE_RGMII_ID;
1429
Andy Fleminge8a2b6a2006-12-01 12:01:06 -06001430 return PHY_INTERFACE_MODE_RGMII;
Andy Fleming7132ab72007-07-11 11:43:07 -05001431 }
Andy Fleminge8a2b6a2006-12-01 12:01:06 -06001432 }
1433
Andy Flemingb31a1d82008-12-16 15:29:15 -08001434 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT)
Andy Fleminge8a2b6a2006-12-01 12:01:06 -06001435 return PHY_INTERFACE_MODE_GMII;
1436
1437 return PHY_INTERFACE_MODE_MII;
1438}
1439
1440
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001441/* Initializes driver's PHY state, and attaches to the PHY.
1442 * Returns 0 on success.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443 */
1444static int init_phy(struct net_device *dev)
1445{
1446 struct gfar_private *priv = netdev_priv(dev);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001447 uint gigabit_support =
Andy Flemingb31a1d82008-12-16 15:29:15 -08001448 priv->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT ?
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001449 SUPPORTED_1000baseT_Full : 0;
Andy Fleminge8a2b6a2006-12-01 12:01:06 -06001450 phy_interface_t interface;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451
1452 priv->oldlink = 0;
1453 priv->oldspeed = 0;
1454 priv->oldduplex = -1;
1455
Andy Fleminge8a2b6a2006-12-01 12:01:06 -06001456 interface = gfar_get_interface(dev);
1457
Anton Vorontsov1db780f2009-07-16 21:31:42 +00001458 priv->phydev = of_phy_connect(dev, priv->phy_node, &adjust_link, 0,
1459 interface);
1460 if (!priv->phydev)
1461 priv->phydev = of_phy_connect_fixed_link(dev, &adjust_link,
1462 interface);
1463 if (!priv->phydev) {
1464 dev_err(&dev->dev, "could not attach to PHY\n");
1465 return -ENODEV;
Grant Likelyfe192a42009-04-25 12:53:12 +00001466 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001467
Kapil Junejad3c12872007-05-11 18:25:11 -05001468 if (interface == PHY_INTERFACE_MODE_SGMII)
1469 gfar_configure_serdes(dev);
1470
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001471 /* Remove any features not supported by the controller */
Grant Likelyfe192a42009-04-25 12:53:12 +00001472 priv->phydev->supported &= (GFAR_SUPPORTED | gigabit_support);
1473 priv->phydev->advertising = priv->phydev->supported;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001474
1475 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476}
1477
Paul Gortmakerd0313582008-04-17 00:08:10 -04001478/*
1479 * Initialize TBI PHY interface for communicating with the
1480 * SERDES lynx PHY on the chip. We communicate with this PHY
1481 * through the MDIO bus on each controller, treating it as a
1482 * "normal" PHY at the address found in the TBIPA register. We assume
1483 * that the TBIPA register is valid. Either the MDIO bus code will set
1484 * it to a value that doesn't conflict with other PHYs on the bus, or the
1485 * value doesn't matter, as there are no other PHYs on the bus.
1486 */
Kapil Junejad3c12872007-05-11 18:25:11 -05001487static void gfar_configure_serdes(struct net_device *dev)
1488{
1489 struct gfar_private *priv = netdev_priv(dev);
Grant Likelyfe192a42009-04-25 12:53:12 +00001490 struct phy_device *tbiphy;
Trent Piephoc1324192008-10-30 18:17:06 -07001491
Grant Likelyfe192a42009-04-25 12:53:12 +00001492 if (!priv->tbi_node) {
1493 dev_warn(&dev->dev, "error: SGMII mode requires that the "
1494 "device tree specify a tbi-handle\n");
1495 return;
1496 }
1497
1498 tbiphy = of_phy_find_device(priv->tbi_node);
1499 if (!tbiphy) {
1500 dev_err(&dev->dev, "error: Could not get TBI device\n");
Andy Flemingb31a1d82008-12-16 15:29:15 -08001501 return;
1502 }
Kapil Junejad3c12872007-05-11 18:25:11 -05001503
Andy Flemingb31a1d82008-12-16 15:29:15 -08001504 /*
1505 * If the link is already up, we must already be ok, and don't need to
Trent Piephobdb59f92008-10-30 18:17:07 -07001506 * configure and reset the TBI<->SerDes link. Maybe U-Boot configured
1507 * everything for us? Resetting it takes the link down and requires
1508 * several seconds for it to come back.
1509 */
Grant Likelyfe192a42009-04-25 12:53:12 +00001510 if (phy_read(tbiphy, MII_BMSR) & BMSR_LSTATUS)
Andy Flemingb31a1d82008-12-16 15:29:15 -08001511 return;
Kapil Junejad3c12872007-05-11 18:25:11 -05001512
Paul Gortmakerd0313582008-04-17 00:08:10 -04001513 /* Single clk mode, mii mode off(for serdes communication) */
Grant Likelyfe192a42009-04-25 12:53:12 +00001514 phy_write(tbiphy, MII_TBICON, TBICON_CLK_SELECT);
Kapil Junejad3c12872007-05-11 18:25:11 -05001515
Grant Likelyfe192a42009-04-25 12:53:12 +00001516 phy_write(tbiphy, MII_ADVERTISE,
Kapil Junejad3c12872007-05-11 18:25:11 -05001517 ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE |
1518 ADVERTISE_1000XPSE_ASYM);
1519
Grant Likelyfe192a42009-04-25 12:53:12 +00001520 phy_write(tbiphy, MII_BMCR, BMCR_ANENABLE |
Kapil Junejad3c12872007-05-11 18:25:11 -05001521 BMCR_ANRESTART | BMCR_FULLDPLX | BMCR_SPEED1000);
1522}
1523
Linus Torvalds1da177e2005-04-16 15:20:36 -07001524static void init_registers(struct net_device *dev)
1525{
1526 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001527 struct gfar __iomem *regs = NULL;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001528 int i = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001530 for (i = 0; i < priv->num_grps; i++) {
1531 regs = priv->gfargrp[i].regs;
1532 /* Clear IEVENT */
1533 gfar_write(&regs->ievent, IEVENT_INIT_CLEAR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001534
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001535 /* Initialize IMASK */
1536 gfar_write(&regs->imask, IMASK_INIT_CLEAR);
1537 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001539 regs = priv->gfargrp[0].regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540 /* Init hash registers to zero */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001541 gfar_write(&regs->igaddr0, 0);
1542 gfar_write(&regs->igaddr1, 0);
1543 gfar_write(&regs->igaddr2, 0);
1544 gfar_write(&regs->igaddr3, 0);
1545 gfar_write(&regs->igaddr4, 0);
1546 gfar_write(&regs->igaddr5, 0);
1547 gfar_write(&regs->igaddr6, 0);
1548 gfar_write(&regs->igaddr7, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001549
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001550 gfar_write(&regs->gaddr0, 0);
1551 gfar_write(&regs->gaddr1, 0);
1552 gfar_write(&regs->gaddr2, 0);
1553 gfar_write(&regs->gaddr3, 0);
1554 gfar_write(&regs->gaddr4, 0);
1555 gfar_write(&regs->gaddr5, 0);
1556 gfar_write(&regs->gaddr6, 0);
1557 gfar_write(&regs->gaddr7, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001558
Linus Torvalds1da177e2005-04-16 15:20:36 -07001559 /* Zero out the rmon mib registers if it has them */
Andy Flemingb31a1d82008-12-16 15:29:15 -08001560 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON) {
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001561 memset_io(&(regs->rmon), 0, sizeof (struct rmon_mib));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001562
1563 /* Mask off the CAM interrupts */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001564 gfar_write(&regs->rmon.cam1, 0xffffffff);
1565 gfar_write(&regs->rmon.cam2, 0xffffffff);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001566 }
1567
1568 /* Initialize the max receive buffer length */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001569 gfar_write(&regs->mrblr, priv->rx_buffer_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570
Linus Torvalds1da177e2005-04-16 15:20:36 -07001571 /* Initialize the Minimum Frame Length Register */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001572 gfar_write(&regs->minflr, MINFLR_INIT_SETTINGS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573}
1574
Anton Vorontsov511d9342010-06-30 06:39:15 +00001575static int __gfar_is_rx_idle(struct gfar_private *priv)
1576{
1577 u32 res;
1578
1579 /*
1580 * Normaly TSEC should not hang on GRS commands, so we should
1581 * actually wait for IEVENT_GRSC flag.
1582 */
1583 if (likely(!gfar_has_errata(priv, GFAR_ERRATA_A002)))
1584 return 0;
1585
1586 /*
1587 * Read the eTSEC register at offset 0xD1C. If bits 7-14 are
1588 * the same as bits 23-30, the eTSEC Rx is assumed to be idle
1589 * and the Rx can be safely reset.
1590 */
1591 res = gfar_read((void __iomem *)priv->gfargrp[0].regs + 0xd1c);
1592 res &= 0x7f807f80;
1593 if ((res & 0xffff) == (res >> 16))
1594 return 1;
1595
1596 return 0;
1597}
Kumar Gala0bbaf062005-06-20 10:54:21 -05001598
1599/* Halt the receive and transmit queues */
Scott Woodd87eb122008-07-11 18:04:45 -05001600static void gfar_halt_nodisable(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001601{
1602 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001603 struct gfar __iomem *regs = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604 u32 tempval;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001605 int i = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001606
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001607 for (i = 0; i < priv->num_grps; i++) {
1608 regs = priv->gfargrp[i].regs;
1609 /* Mask all interrupts */
1610 gfar_write(&regs->imask, IMASK_INIT_CLEAR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001611
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001612 /* Clear all interrupts */
1613 gfar_write(&regs->ievent, IEVENT_INIT_CLEAR);
1614 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001615
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001616 regs = priv->gfargrp[0].regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001617 /* Stop the DMA, and wait for it to stop */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001618 tempval = gfar_read(&regs->dmactrl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001619 if ((tempval & (DMACTRL_GRS | DMACTRL_GTS))
1620 != (DMACTRL_GRS | DMACTRL_GTS)) {
Anton Vorontsov511d9342010-06-30 06:39:15 +00001621 int ret;
1622
Linus Torvalds1da177e2005-04-16 15:20:36 -07001623 tempval |= (DMACTRL_GRS | DMACTRL_GTS);
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001624 gfar_write(&regs->dmactrl, tempval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001625
Anton Vorontsov511d9342010-06-30 06:39:15 +00001626 do {
1627 ret = spin_event_timeout(((gfar_read(&regs->ievent) &
1628 (IEVENT_GRSC | IEVENT_GTSC)) ==
1629 (IEVENT_GRSC | IEVENT_GTSC)), 1000000, 0);
1630 if (!ret && !(gfar_read(&regs->ievent) & IEVENT_GRSC))
1631 ret = __gfar_is_rx_idle(priv);
1632 } while (!ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001633 }
Scott Woodd87eb122008-07-11 18:04:45 -05001634}
Scott Woodd87eb122008-07-11 18:04:45 -05001635
1636/* Halt the receive and transmit queues */
1637void gfar_halt(struct net_device *dev)
1638{
1639 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001640 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Scott Woodd87eb122008-07-11 18:04:45 -05001641 u32 tempval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001642
Scott Wood2a54adc2008-08-12 15:10:46 -05001643 gfar_halt_nodisable(dev);
1644
Linus Torvalds1da177e2005-04-16 15:20:36 -07001645 /* Disable Rx and Tx */
1646 tempval = gfar_read(&regs->maccfg1);
1647 tempval &= ~(MACCFG1_RX_EN | MACCFG1_TX_EN);
1648 gfar_write(&regs->maccfg1, tempval);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001649}
1650
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001651static void free_grp_irqs(struct gfar_priv_grp *grp)
1652{
1653 free_irq(grp->interruptError, grp);
1654 free_irq(grp->interruptTransmit, grp);
1655 free_irq(grp->interruptReceive, grp);
1656}
1657
Kumar Gala0bbaf062005-06-20 10:54:21 -05001658void stop_gfar(struct net_device *dev)
1659{
1660 struct gfar_private *priv = netdev_priv(dev);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001661 unsigned long flags;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001662 int i;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001663
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001664 phy_stop(priv->phydev);
1665
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001666
Kumar Gala0bbaf062005-06-20 10:54:21 -05001667 /* Lock it down */
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001668 local_irq_save(flags);
1669 lock_tx_qs(priv);
1670 lock_rx_qs(priv);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001671
Kumar Gala0bbaf062005-06-20 10:54:21 -05001672 gfar_halt(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001673
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001674 unlock_rx_qs(priv);
1675 unlock_tx_qs(priv);
1676 local_irq_restore(flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001677
1678 /* Free the IRQs */
Andy Flemingb31a1d82008-12-16 15:29:15 -08001679 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001680 for (i = 0; i < priv->num_grps; i++)
1681 free_grp_irqs(&priv->gfargrp[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001682 } else {
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001683 for (i = 0; i < priv->num_grps; i++)
1684 free_irq(priv->gfargrp[i].interruptTransmit,
1685 &priv->gfargrp[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001686 }
1687
1688 free_skb_resources(priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689}
1690
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001691static void free_skb_tx_queue(struct gfar_priv_tx_q *tx_queue)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001693 struct txbd8 *txbdp;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001694 struct gfar_private *priv = netdev_priv(tx_queue->dev);
Dai Haruki4669bc92008-12-17 16:51:04 -08001695 int i, j;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001697 txbdp = tx_queue->tx_bd_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001698
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001699 for (i = 0; i < tx_queue->tx_ring_size; i++) {
1700 if (!tx_queue->tx_skbuff[i])
Dai Haruki4669bc92008-12-17 16:51:04 -08001701 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001702
Kumar Gala48268572009-03-18 23:28:22 -07001703 dma_unmap_single(&priv->ofdev->dev, txbdp->bufPtr,
Dai Haruki4669bc92008-12-17 16:51:04 -08001704 txbdp->length, DMA_TO_DEVICE);
1705 txbdp->lstatus = 0;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001706 for (j = 0; j < skb_shinfo(tx_queue->tx_skbuff[i])->nr_frags;
1707 j++) {
Dai Haruki4669bc92008-12-17 16:51:04 -08001708 txbdp++;
Kumar Gala48268572009-03-18 23:28:22 -07001709 dma_unmap_page(&priv->ofdev->dev, txbdp->bufPtr,
Dai Haruki4669bc92008-12-17 16:51:04 -08001710 txbdp->length, DMA_TO_DEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001711 }
Andy Flemingad5da7a2008-05-07 13:20:55 -05001712 txbdp++;
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001713 dev_kfree_skb_any(tx_queue->tx_skbuff[i]);
1714 tx_queue->tx_skbuff[i] = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715 }
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001716 kfree(tx_queue->tx_skbuff);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001717}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001718
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001719static void free_skb_rx_queue(struct gfar_priv_rx_q *rx_queue)
1720{
1721 struct rxbd8 *rxbdp;
1722 struct gfar_private *priv = netdev_priv(rx_queue->dev);
1723 int i;
1724
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001725 rxbdp = rx_queue->rx_bd_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001726
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001727 for (i = 0; i < rx_queue->rx_ring_size; i++) {
1728 if (rx_queue->rx_skbuff[i]) {
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001729 dma_unmap_single(&priv->ofdev->dev,
1730 rxbdp->bufPtr, priv->rx_buffer_size,
Anton Vorontsove69edd22009-10-12 06:00:30 +00001731 DMA_FROM_DEVICE);
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001732 dev_kfree_skb_any(rx_queue->rx_skbuff[i]);
1733 rx_queue->rx_skbuff[i] = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001734 }
Anton Vorontsove69edd22009-10-12 06:00:30 +00001735 rxbdp->lstatus = 0;
1736 rxbdp->bufPtr = 0;
1737 rxbdp++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001738 }
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001739 kfree(rx_queue->rx_skbuff);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001740}
Anton Vorontsove69edd22009-10-12 06:00:30 +00001741
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001742/* If there are any tx skbs or rx skbs still around, free them.
1743 * Then free tx_skbuff and rx_skbuff */
1744static void free_skb_resources(struct gfar_private *priv)
1745{
1746 struct gfar_priv_tx_q *tx_queue = NULL;
1747 struct gfar_priv_rx_q *rx_queue = NULL;
1748 int i;
1749
1750 /* Go through all the buffer descriptors and free their data buffers */
1751 for (i = 0; i < priv->num_tx_queues; i++) {
1752 tx_queue = priv->tx_queue[i];
Andy Fleming7c0d10d2010-03-29 15:42:23 +00001753 if(tx_queue->tx_skbuff)
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001754 free_skb_tx_queue(tx_queue);
1755 }
1756
1757 for (i = 0; i < priv->num_rx_queues; i++) {
1758 rx_queue = priv->rx_queue[i];
Andy Fleming7c0d10d2010-03-29 15:42:23 +00001759 if(rx_queue->rx_skbuff)
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001760 free_skb_rx_queue(rx_queue);
1761 }
1762
1763 dma_free_coherent(&priv->ofdev->dev,
1764 sizeof(struct txbd8) * priv->total_tx_ring_size +
1765 sizeof(struct rxbd8) * priv->total_rx_ring_size,
1766 priv->tx_queue[0]->tx_bd_base,
1767 priv->tx_queue[0]->tx_bd_dma_base);
Sebastian Andrzej Siewior7df9c432010-05-04 22:30:47 +00001768 skb_queue_purge(&priv->rx_recycle);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769}
1770
Kumar Gala0bbaf062005-06-20 10:54:21 -05001771void gfar_start(struct net_device *dev)
1772{
1773 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001774 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001775 u32 tempval;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001776 int i = 0;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001777
1778 /* Enable Rx and Tx in MACCFG1 */
1779 tempval = gfar_read(&regs->maccfg1);
1780 tempval |= (MACCFG1_RX_EN | MACCFG1_TX_EN);
1781 gfar_write(&regs->maccfg1, tempval);
1782
1783 /* Initialize DMACTRL to have WWR and WOP */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001784 tempval = gfar_read(&regs->dmactrl);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001785 tempval |= DMACTRL_INIT_SETTINGS;
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001786 gfar_write(&regs->dmactrl, tempval);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001787
Kumar Gala0bbaf062005-06-20 10:54:21 -05001788 /* Make sure we aren't stopped */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001789 tempval = gfar_read(&regs->dmactrl);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001790 tempval &= ~(DMACTRL_GRS | DMACTRL_GTS);
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001791 gfar_write(&regs->dmactrl, tempval);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001792
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001793 for (i = 0; i < priv->num_grps; i++) {
1794 regs = priv->gfargrp[i].regs;
1795 /* Clear THLT/RHLT, so that the DMA starts polling now */
1796 gfar_write(&regs->tstat, priv->gfargrp[i].tstat);
1797 gfar_write(&regs->rstat, priv->gfargrp[i].rstat);
1798 /* Unmask the interrupts we look for */
1799 gfar_write(&regs->imask, IMASK_DEFAULT);
1800 }
Dai Haruki12dea572008-12-16 15:30:20 -08001801
Eric Dumazet1ae5dc32010-05-10 05:01:31 -07001802 dev->trans_start = jiffies; /* prevent tx timeout */
Kumar Gala0bbaf062005-06-20 10:54:21 -05001803}
1804
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001805void gfar_configure_coalescing(struct gfar_private *priv,
Anton Vorontsov18294ad2009-11-04 12:53:00 +00001806 unsigned long tx_mask, unsigned long rx_mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001807{
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001808 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Anton Vorontsov18294ad2009-11-04 12:53:00 +00001809 u32 __iomem *baddr;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001810 int i = 0;
1811
1812 /* Backward compatible case ---- even if we enable
1813 * multiple queues, there's only single reg to program
1814 */
1815 gfar_write(&regs->txic, 0);
1816 if(likely(priv->tx_queue[0]->txcoalescing))
1817 gfar_write(&regs->txic, priv->tx_queue[0]->txic);
1818
1819 gfar_write(&regs->rxic, 0);
1820 if(unlikely(priv->rx_queue[0]->rxcoalescing))
1821 gfar_write(&regs->rxic, priv->rx_queue[0]->rxic);
1822
1823 if (priv->mode == MQ_MG_MODE) {
1824 baddr = &regs->txic0;
Akinobu Mita984b3f52010-03-05 13:41:37 -08001825 for_each_set_bit(i, &tx_mask, priv->num_tx_queues) {
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001826 if (likely(priv->tx_queue[i]->txcoalescing)) {
1827 gfar_write(baddr + i, 0);
1828 gfar_write(baddr + i, priv->tx_queue[i]->txic);
1829 }
1830 }
1831
1832 baddr = &regs->rxic0;
Akinobu Mita984b3f52010-03-05 13:41:37 -08001833 for_each_set_bit(i, &rx_mask, priv->num_rx_queues) {
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001834 if (likely(priv->rx_queue[i]->rxcoalescing)) {
1835 gfar_write(baddr + i, 0);
1836 gfar_write(baddr + i, priv->rx_queue[i]->rxic);
1837 }
1838 }
1839 }
1840}
1841
1842static int register_grp_irqs(struct gfar_priv_grp *grp)
1843{
1844 struct gfar_private *priv = grp->priv;
1845 struct net_device *dev = priv->ndev;
Anton Vorontsovccc05c62009-10-12 06:00:26 +00001846 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001847
Linus Torvalds1da177e2005-04-16 15:20:36 -07001848 /* If the device has multiple interrupts, register for
1849 * them. Otherwise, only register for the one */
Andy Flemingb31a1d82008-12-16 15:29:15 -08001850 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05001851 /* Install our interrupt handlers for Error,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001852 * Transmit, and Receive */
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001853 if ((err = request_irq(grp->interruptError, gfar_error, 0,
1854 grp->int_name_er,grp)) < 0) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05001855 if (netif_msg_intr(priv))
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001856 printk(KERN_ERR "%s: Can't get IRQ %d\n",
1857 dev->name, grp->interruptError);
1858
Julia Lawall2145f1a2010-08-05 10:26:20 +00001859 goto err_irq_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001860 }
1861
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001862 if ((err = request_irq(grp->interruptTransmit, gfar_transmit,
1863 0, grp->int_name_tx, grp)) < 0) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05001864 if (netif_msg_intr(priv))
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001865 printk(KERN_ERR "%s: Can't get IRQ %d\n",
1866 dev->name, grp->interruptTransmit);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001867 goto tx_irq_fail;
1868 }
1869
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001870 if ((err = request_irq(grp->interruptReceive, gfar_receive, 0,
1871 grp->int_name_rx, grp)) < 0) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05001872 if (netif_msg_intr(priv))
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001873 printk(KERN_ERR "%s: Can't get IRQ %d\n",
1874 dev->name, grp->interruptReceive);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001875 goto rx_irq_fail;
1876 }
1877 } else {
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001878 if ((err = request_irq(grp->interruptTransmit, gfar_interrupt, 0,
1879 grp->int_name_tx, grp)) < 0) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05001880 if (netif_msg_intr(priv))
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001881 printk(KERN_ERR "%s: Can't get IRQ %d\n",
1882 dev->name, grp->interruptTransmit);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001883 goto err_irq_fail;
1884 }
1885 }
1886
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001887 return 0;
1888
1889rx_irq_fail:
1890 free_irq(grp->interruptTransmit, grp);
1891tx_irq_fail:
1892 free_irq(grp->interruptError, grp);
1893err_irq_fail:
1894 return err;
1895
1896}
1897
1898/* Bring the controller up and running */
1899int startup_gfar(struct net_device *ndev)
1900{
1901 struct gfar_private *priv = netdev_priv(ndev);
1902 struct gfar __iomem *regs = NULL;
1903 int err, i, j;
1904
1905 for (i = 0; i < priv->num_grps; i++) {
1906 regs= priv->gfargrp[i].regs;
1907 gfar_write(&regs->imask, IMASK_INIT_CLEAR);
1908 }
1909
1910 regs= priv->gfargrp[0].regs;
1911 err = gfar_alloc_skb_resources(ndev);
1912 if (err)
1913 return err;
1914
1915 gfar_init_mac(ndev);
1916
1917 for (i = 0; i < priv->num_grps; i++) {
1918 err = register_grp_irqs(&priv->gfargrp[i]);
1919 if (err) {
1920 for (j = 0; j < i; j++)
1921 free_grp_irqs(&priv->gfargrp[j]);
1922 goto irq_fail;
1923 }
1924 }
1925
Andy Fleming7f7f5312005-11-11 12:38:59 -06001926 /* Start the controller */
Anton Vorontsovccc05c62009-10-12 06:00:26 +00001927 gfar_start(ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001928
Anton Vorontsov826aa4a2009-10-12 06:00:34 +00001929 phy_start(priv->phydev);
1930
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001931 gfar_configure_coalescing(priv, 0xFF, 0xFF);
1932
Linus Torvalds1da177e2005-04-16 15:20:36 -07001933 return 0;
1934
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001935irq_fail:
Anton Vorontsove69edd22009-10-12 06:00:30 +00001936 free_skb_resources(priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001937 return err;
1938}
1939
1940/* Called when something needs to use the ethernet device */
1941/* Returns 0 for success. */
1942static int gfar_enet_open(struct net_device *dev)
1943{
Li Yang94e8cc32007-10-12 21:53:51 +08001944 struct gfar_private *priv = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001945 int err;
1946
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001947 enable_napi(priv);
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001948
Andy Fleming0fd56bb2009-02-04 16:43:16 -08001949 skb_queue_head_init(&priv->rx_recycle);
1950
Linus Torvalds1da177e2005-04-16 15:20:36 -07001951 /* Initialize a bunch of registers */
1952 init_registers(dev);
1953
1954 gfar_set_mac_address(dev);
1955
1956 err = init_phy(dev);
1957
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001958 if (err) {
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001959 disable_napi(priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001960 return err;
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001961 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001962
1963 err = startup_gfar(dev);
Anton Vorontsovdb0e8e32007-10-17 23:57:46 +04001964 if (err) {
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001965 disable_napi(priv);
Anton Vorontsovdb0e8e32007-10-17 23:57:46 +04001966 return err;
1967 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001968
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001969 netif_tx_start_all_queues(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001970
Anton Vorontsov2884e5c2009-02-01 00:52:34 -08001971 device_set_wakeup_enable(&dev->dev, priv->wol_en);
1972
Linus Torvalds1da177e2005-04-16 15:20:36 -07001973 return err;
1974}
1975
Stephen Hemminger54dc79f2009-03-27 00:38:45 -07001976static inline struct txfcb *gfar_add_fcb(struct sk_buff *skb)
Kumar Gala0bbaf062005-06-20 10:54:21 -05001977{
Stephen Hemminger54dc79f2009-03-27 00:38:45 -07001978 struct txfcb *fcb = (struct txfcb *)skb_push(skb, GMAC_FCB_LEN);
Kumar Gala6c31d552009-04-28 08:04:10 -07001979
1980 memset(fcb, 0, GMAC_FCB_LEN);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001981
Kumar Gala0bbaf062005-06-20 10:54:21 -05001982 return fcb;
1983}
1984
1985static inline void gfar_tx_checksum(struct sk_buff *skb, struct txfcb *fcb)
1986{
Andy Fleming7f7f5312005-11-11 12:38:59 -06001987 u8 flags = 0;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001988
1989 /* If we're here, it's a IP packet with a TCP or UDP
1990 * payload. We set it to checksum, using a pseudo-header
1991 * we provide
1992 */
Andy Fleming7f7f5312005-11-11 12:38:59 -06001993 flags = TXFCB_DEFAULT;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001994
Andy Fleming7f7f5312005-11-11 12:38:59 -06001995 /* Tell the controller what the protocol is */
1996 /* And provide the already calculated phcs */
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -07001997 if (ip_hdr(skb)->protocol == IPPROTO_UDP) {
Andy Fleming7f7f5312005-11-11 12:38:59 -06001998 flags |= TXFCB_UDP;
Arnaldo Carvalho de Melo4bedb452007-03-13 14:28:48 -03001999 fcb->phcs = udp_hdr(skb)->check;
Andy Fleming7f7f5312005-11-11 12:38:59 -06002000 } else
Kumar Gala8da32de2007-06-29 00:12:04 -05002001 fcb->phcs = tcp_hdr(skb)->check;
Kumar Gala0bbaf062005-06-20 10:54:21 -05002002
2003 /* l3os is the distance between the start of the
2004 * frame (skb->data) and the start of the IP hdr.
2005 * l4os is the distance between the start of the
2006 * l3 hdr and the l4 hdr */
Arnaldo Carvalho de Melobbe735e2007-03-10 22:16:10 -03002007 fcb->l3os = (u16)(skb_network_offset(skb) - GMAC_FCB_LEN);
Arnaldo Carvalho de Melocfe1fc72007-03-16 17:26:39 -03002008 fcb->l4os = skb_network_header_len(skb);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002009
Andy Fleming7f7f5312005-11-11 12:38:59 -06002010 fcb->flags = flags;
Kumar Gala0bbaf062005-06-20 10:54:21 -05002011}
2012
Andy Fleming7f7f5312005-11-11 12:38:59 -06002013void inline gfar_tx_vlan(struct sk_buff *skb, struct txfcb *fcb)
Kumar Gala0bbaf062005-06-20 10:54:21 -05002014{
Andy Fleming7f7f5312005-11-11 12:38:59 -06002015 fcb->flags |= TXFCB_VLN;
Kumar Gala0bbaf062005-06-20 10:54:21 -05002016 fcb->vlctl = vlan_tx_tag_get(skb);
2017}
2018
Dai Haruki4669bc92008-12-17 16:51:04 -08002019static inline struct txbd8 *skip_txbd(struct txbd8 *bdp, int stride,
2020 struct txbd8 *base, int ring_size)
2021{
2022 struct txbd8 *new_bd = bdp + stride;
2023
2024 return (new_bd >= (base + ring_size)) ? (new_bd - ring_size) : new_bd;
2025}
2026
2027static inline struct txbd8 *next_txbd(struct txbd8 *bdp, struct txbd8 *base,
2028 int ring_size)
2029{
2030 return skip_txbd(bdp, 1, base, ring_size);
2031}
2032
Linus Torvalds1da177e2005-04-16 15:20:36 -07002033/* This is called by the kernel when a frame is ready for transmission. */
2034/* It is pointed to by the dev->hard_start_xmit function pointer */
2035static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
2036{
2037 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002038 struct gfar_priv_tx_q *tx_queue = NULL;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002039 struct netdev_queue *txq;
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002040 struct gfar __iomem *regs = NULL;
Kumar Gala0bbaf062005-06-20 10:54:21 -05002041 struct txfcb *fcb = NULL;
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002042 struct txbd8 *txbdp, *txbdp_start, *base, *txbdp_tstamp = NULL;
Dai Haruki5a5efed2008-12-16 15:34:50 -08002043 u32 lstatus;
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002044 int i, rq = 0, do_tstamp = 0;
Dai Haruki4669bc92008-12-17 16:51:04 -08002045 u32 bufaddr;
Andy Flemingfef61082006-04-20 16:44:29 -05002046 unsigned long flags;
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002047 unsigned int nr_frags, nr_txbds, length;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002048
Anton Vorontsovdeb90ea2010-06-30 06:39:13 +00002049 /*
2050 * TOE=1 frames larger than 2500 bytes may see excess delays
2051 * before start of transmission.
2052 */
2053 if (unlikely(gfar_has_errata(priv, GFAR_ERRATA_76) &&
2054 skb->ip_summed == CHECKSUM_PARTIAL &&
2055 skb->len > 2500)) {
2056 int ret;
2057
2058 ret = skb_checksum_help(skb);
2059 if (ret)
2060 return ret;
2061 }
2062
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002063 rq = skb->queue_mapping;
2064 tx_queue = priv->tx_queue[rq];
2065 txq = netdev_get_tx_queue(dev, rq);
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002066 base = tx_queue->tx_bd_base;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00002067 regs = tx_queue->grp->regs;
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002068
2069 /* check if time stamp should be generated */
Oliver Hartkopp2244d072010-08-17 08:59:14 +00002070 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
2071 priv->hwts_tx_en))
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002072 do_tstamp = 1;
Dai Haruki4669bc92008-12-17 16:51:04 -08002073
Li Yang5b28bea2009-03-27 15:54:30 -07002074 /* make space for additional header when fcb is needed */
2075 if (((skb->ip_summed == CHECKSUM_PARTIAL) ||
Jesse Grosseab6d182010-10-20 13:56:03 +00002076 vlan_tx_tag_present(skb) ||
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002077 unlikely(do_tstamp)) &&
Li Yang5b28bea2009-03-27 15:54:30 -07002078 (skb_headroom(skb) < GMAC_FCB_LEN)) {
Stephen Hemminger54dc79f2009-03-27 00:38:45 -07002079 struct sk_buff *skb_new;
2080
2081 skb_new = skb_realloc_headroom(skb, GMAC_FCB_LEN);
2082 if (!skb_new) {
2083 dev->stats.tx_errors++;
David S. Millerbd14ba82009-03-27 01:10:58 -07002084 kfree_skb(skb);
Stephen Hemminger54dc79f2009-03-27 00:38:45 -07002085 return NETDEV_TX_OK;
2086 }
2087 kfree_skb(skb);
2088 skb = skb_new;
2089 }
2090
Dai Haruki4669bc92008-12-17 16:51:04 -08002091 /* total number of fragments in the SKB */
2092 nr_frags = skb_shinfo(skb)->nr_frags;
2093
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002094 /* calculate the required number of TxBDs for this skb */
2095 if (unlikely(do_tstamp))
2096 nr_txbds = nr_frags + 2;
2097 else
2098 nr_txbds = nr_frags + 1;
2099
Dai Haruki4669bc92008-12-17 16:51:04 -08002100 /* check if there is space to queue this packet */
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002101 if (nr_txbds > tx_queue->num_txbdfree) {
Dai Haruki4669bc92008-12-17 16:51:04 -08002102 /* no space, stop the queue */
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002103 netif_tx_stop_queue(txq);
Dai Haruki4669bc92008-12-17 16:51:04 -08002104 dev->stats.tx_fifo_errors++;
Dai Haruki4669bc92008-12-17 16:51:04 -08002105 return NETDEV_TX_BUSY;
2106 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002107
2108 /* Update transmit stats */
Eric Dumazet1ac9ad12011-01-12 12:13:14 +00002109 tx_queue->stats.tx_bytes += skb->len;
2110 tx_queue->stats.tx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002111
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002112 txbdp = txbdp_start = tx_queue->cur_tx;
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002113 lstatus = txbdp->lstatus;
2114
2115 /* Time stamp insertion requires one additional TxBD */
2116 if (unlikely(do_tstamp))
2117 txbdp_tstamp = txbdp = next_txbd(txbdp, base,
2118 tx_queue->tx_ring_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002119
Dai Haruki4669bc92008-12-17 16:51:04 -08002120 if (nr_frags == 0) {
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002121 if (unlikely(do_tstamp))
2122 txbdp_tstamp->lstatus |= BD_LFLAG(TXBD_LAST |
2123 TXBD_INTERRUPT);
2124 else
2125 lstatus |= BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT);
Dai Haruki4669bc92008-12-17 16:51:04 -08002126 } else {
2127 /* Place the fragment addresses and lengths into the TxBDs */
2128 for (i = 0; i < nr_frags; i++) {
2129 /* Point at the next BD, wrapping as needed */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002130 txbdp = next_txbd(txbdp, base, tx_queue->tx_ring_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002131
Dai Haruki4669bc92008-12-17 16:51:04 -08002132 length = skb_shinfo(skb)->frags[i].size;
2133
2134 lstatus = txbdp->lstatus | length |
2135 BD_LFLAG(TXBD_READY);
2136
2137 /* Handle the last BD specially */
2138 if (i == nr_frags - 1)
2139 lstatus |= BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT);
2140
Kumar Gala48268572009-03-18 23:28:22 -07002141 bufaddr = dma_map_page(&priv->ofdev->dev,
Dai Haruki4669bc92008-12-17 16:51:04 -08002142 skb_shinfo(skb)->frags[i].page,
2143 skb_shinfo(skb)->frags[i].page_offset,
2144 length,
2145 DMA_TO_DEVICE);
2146
2147 /* set the TxBD length and buffer pointer */
2148 txbdp->bufPtr = bufaddr;
2149 txbdp->lstatus = lstatus;
2150 }
2151
2152 lstatus = txbdp_start->lstatus;
2153 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002154
Kumar Gala0bbaf062005-06-20 10:54:21 -05002155 /* Set up checksumming */
Dai Haruki12dea572008-12-16 15:30:20 -08002156 if (CHECKSUM_PARTIAL == skb->ip_summed) {
Stephen Hemminger54dc79f2009-03-27 00:38:45 -07002157 fcb = gfar_add_fcb(skb);
2158 lstatus |= BD_LFLAG(TXBD_TOE);
2159 gfar_tx_checksum(skb, fcb);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002160 }
2161
Jesse Grosseab6d182010-10-20 13:56:03 +00002162 if (vlan_tx_tag_present(skb)) {
Stephen Hemminger54dc79f2009-03-27 00:38:45 -07002163 if (unlikely(NULL == fcb)) {
2164 fcb = gfar_add_fcb(skb);
Dai Haruki5a5efed2008-12-16 15:34:50 -08002165 lstatus |= BD_LFLAG(TXBD_TOE);
Andy Fleming7f7f5312005-11-11 12:38:59 -06002166 }
Stephen Hemminger54dc79f2009-03-27 00:38:45 -07002167
2168 gfar_tx_vlan(skb, fcb);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002169 }
2170
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002171 /* Setup tx hardware time stamping if requested */
2172 if (unlikely(do_tstamp)) {
Oliver Hartkopp2244d072010-08-17 08:59:14 +00002173 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002174 if (fcb == NULL)
2175 fcb = gfar_add_fcb(skb);
2176 fcb->ptp = 1;
2177 lstatus |= BD_LFLAG(TXBD_TOE);
2178 }
2179
Kumar Gala48268572009-03-18 23:28:22 -07002180 txbdp_start->bufPtr = dma_map_single(&priv->ofdev->dev, skb->data,
Dai Haruki4669bc92008-12-17 16:51:04 -08002181 skb_headlen(skb), DMA_TO_DEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002182
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002183 /*
2184 * If time stamping is requested one additional TxBD must be set up. The
2185 * first TxBD points to the FCB and must have a data length of
2186 * GMAC_FCB_LEN. The second TxBD points to the actual frame data with
2187 * the full frame length.
2188 */
2189 if (unlikely(do_tstamp)) {
2190 txbdp_tstamp->bufPtr = txbdp_start->bufPtr + GMAC_FCB_LEN;
2191 txbdp_tstamp->lstatus |= BD_LFLAG(TXBD_READY) |
2192 (skb_headlen(skb) - GMAC_FCB_LEN);
2193 lstatus |= BD_LFLAG(TXBD_CRC | TXBD_READY) | GMAC_FCB_LEN;
2194 } else {
2195 lstatus |= BD_LFLAG(TXBD_CRC | TXBD_READY) | skb_headlen(skb);
2196 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002197
Dai Haruki4669bc92008-12-17 16:51:04 -08002198 /*
Anton Vorontsova3bc1f12009-11-10 14:11:10 +00002199 * We can work in parallel with gfar_clean_tx_ring(), except
2200 * when modifying num_txbdfree. Note that we didn't grab the lock
2201 * when we were reading the num_txbdfree and checking for available
2202 * space, that's because outside of this function it can only grow,
2203 * and once we've got needed space, it cannot suddenly disappear.
2204 *
2205 * The lock also protects us from gfar_error(), which can modify
2206 * regs->tstat and thus retrigger the transfers, which is why we
2207 * also must grab the lock before setting ready bit for the first
2208 * to be transmitted BD.
2209 */
2210 spin_lock_irqsave(&tx_queue->txlock, flags);
2211
2212 /*
Dai Haruki4669bc92008-12-17 16:51:04 -08002213 * The powerpc-specific eieio() is used, as wmb() has too strong
Scott Wood3b6330c2007-05-16 15:06:59 -05002214 * semantics (it requires synchronization between cacheable and
2215 * uncacheable mappings, which eieio doesn't provide and which we
2216 * don't need), thus requiring a more expensive sync instruction. At
2217 * some point, the set of architecture-independent barrier functions
2218 * should be expanded to include weaker barriers.
2219 */
Scott Wood3b6330c2007-05-16 15:06:59 -05002220 eieio();
Andy Fleming7f7f5312005-11-11 12:38:59 -06002221
Dai Haruki4669bc92008-12-17 16:51:04 -08002222 txbdp_start->lstatus = lstatus;
2223
Anton Vorontsov0eddba52010-03-03 08:18:58 +00002224 eieio(); /* force lstatus write before tx_skbuff */
2225
2226 tx_queue->tx_skbuff[tx_queue->skb_curtx] = skb;
2227
Dai Haruki4669bc92008-12-17 16:51:04 -08002228 /* Update the current skb pointer to the next entry we will use
2229 * (wrapping if necessary) */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002230 tx_queue->skb_curtx = (tx_queue->skb_curtx + 1) &
2231 TX_RING_MOD_MASK(tx_queue->tx_ring_size);
Dai Haruki4669bc92008-12-17 16:51:04 -08002232
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002233 tx_queue->cur_tx = next_txbd(txbdp, base, tx_queue->tx_ring_size);
Dai Haruki4669bc92008-12-17 16:51:04 -08002234
2235 /* reduce TxBD free count */
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002236 tx_queue->num_txbdfree -= (nr_txbds);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002237
2238 /* If the next BD still needs to be cleaned up, then the bds
2239 are full. We need to tell the kernel to stop sending us stuff. */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002240 if (!tx_queue->num_txbdfree) {
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002241 netif_tx_stop_queue(txq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002242
Jeff Garzik09f75cd2007-10-03 17:41:50 -07002243 dev->stats.tx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002244 }
2245
Linus Torvalds1da177e2005-04-16 15:20:36 -07002246 /* Tell the DMA to go go go */
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002247 gfar_write(&regs->tstat, TSTAT_CLEAR_THALT >> tx_queue->qindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002248
2249 /* Unlock priv */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002250 spin_unlock_irqrestore(&tx_queue->txlock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002251
Stephen Hemminger54dc79f2009-03-27 00:38:45 -07002252 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002253}
2254
2255/* Stops the kernel queue, and halts the controller */
2256static int gfar_close(struct net_device *dev)
2257{
2258 struct gfar_private *priv = netdev_priv(dev);
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002259
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00002260 disable_napi(priv);
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002261
Sebastian Siewiorab939902008-08-19 21:12:45 +02002262 cancel_work_sync(&priv->reset_task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002263 stop_gfar(dev);
2264
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002265 /* Disconnect from the PHY */
2266 phy_disconnect(priv->phydev);
2267 priv->phydev = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002268
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002269 netif_tx_stop_all_queues(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002270
2271 return 0;
2272}
2273
Linus Torvalds1da177e2005-04-16 15:20:36 -07002274/* Changes the mac address if the controller is not running. */
Andy Flemingf162b9d2008-05-02 13:00:30 -05002275static int gfar_set_mac_address(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002276{
Andy Fleming7f7f5312005-11-11 12:38:59 -06002277 gfar_set_mac_for_addr(dev, 0, dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002278
2279 return 0;
2280}
2281
2282
Kumar Gala0bbaf062005-06-20 10:54:21 -05002283/* Enables and disables VLAN insertion/extraction */
2284static void gfar_vlan_rx_register(struct net_device *dev,
2285 struct vlan_group *grp)
2286{
2287 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002288 struct gfar __iomem *regs = NULL;
Kumar Gala0bbaf062005-06-20 10:54:21 -05002289 unsigned long flags;
2290 u32 tempval;
2291
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00002292 regs = priv->gfargrp[0].regs;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002293 local_irq_save(flags);
2294 lock_rx_qs(priv);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002295
Anton Vorontsovcd1f55a2009-01-26 14:33:23 -08002296 priv->vlgrp = grp;
Kumar Gala0bbaf062005-06-20 10:54:21 -05002297
2298 if (grp) {
2299 /* Enable VLAN tag insertion */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002300 tempval = gfar_read(&regs->tctrl);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002301 tempval |= TCTRL_VLINS;
2302
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002303 gfar_write(&regs->tctrl, tempval);
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002304
Kumar Gala0bbaf062005-06-20 10:54:21 -05002305 /* Enable VLAN tag extraction */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002306 tempval = gfar_read(&regs->rctrl);
Dai Haruki77ecaf22008-12-16 15:30:48 -08002307 tempval |= (RCTRL_VLEX | RCTRL_PRSDEP_INIT);
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002308 gfar_write(&regs->rctrl, tempval);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002309 } else {
2310 /* Disable VLAN tag insertion */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002311 tempval = gfar_read(&regs->tctrl);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002312 tempval &= ~TCTRL_VLINS;
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002313 gfar_write(&regs->tctrl, tempval);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002314
2315 /* Disable VLAN tag extraction */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002316 tempval = gfar_read(&regs->rctrl);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002317 tempval &= ~RCTRL_VLEX;
Dai Haruki77ecaf22008-12-16 15:30:48 -08002318 /* If parse is no longer required, then disable parser */
2319 if (tempval & RCTRL_REQ_PARSER)
2320 tempval |= RCTRL_PRSDEP_INIT;
2321 else
2322 tempval &= ~RCTRL_PRSDEP_INIT;
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002323 gfar_write(&regs->rctrl, tempval);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002324 }
2325
Dai Haruki77ecaf22008-12-16 15:30:48 -08002326 gfar_change_mtu(dev, dev->mtu);
2327
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002328 unlock_rx_qs(priv);
2329 local_irq_restore(flags);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002330}
2331
Linus Torvalds1da177e2005-04-16 15:20:36 -07002332static int gfar_change_mtu(struct net_device *dev, int new_mtu)
2333{
2334 int tempsize, tempval;
2335 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00002336 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002337 int oldsize = priv->rx_buffer_size;
Kumar Gala0bbaf062005-06-20 10:54:21 -05002338 int frame_size = new_mtu + ETH_HLEN;
2339
Dai Haruki77ecaf22008-12-16 15:30:48 -08002340 if (priv->vlgrp)
Dai Harukifaa89572008-03-24 10:53:26 -05002341 frame_size += VLAN_HLEN;
Kumar Gala0bbaf062005-06-20 10:54:21 -05002342
Linus Torvalds1da177e2005-04-16 15:20:36 -07002343 if ((frame_size < 64) || (frame_size > JUMBO_FRAME_SIZE)) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05002344 if (netif_msg_drv(priv))
2345 printk(KERN_ERR "%s: Invalid MTU setting\n",
2346 dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002347 return -EINVAL;
2348 }
2349
Dai Haruki77ecaf22008-12-16 15:30:48 -08002350 if (gfar_uses_fcb(priv))
2351 frame_size += GMAC_FCB_LEN;
2352
2353 frame_size += priv->padding;
2354
Linus Torvalds1da177e2005-04-16 15:20:36 -07002355 tempsize =
2356 (frame_size & ~(INCREMENTAL_BUFFER_SIZE - 1)) +
2357 INCREMENTAL_BUFFER_SIZE;
2358
2359 /* Only stop and start the controller if it isn't already
Andy Fleming7f7f5312005-11-11 12:38:59 -06002360 * stopped, and we changed something */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002361 if ((oldsize != tempsize) && (dev->flags & IFF_UP))
2362 stop_gfar(dev);
2363
2364 priv->rx_buffer_size = tempsize;
2365
2366 dev->mtu = new_mtu;
2367
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002368 gfar_write(&regs->mrblr, priv->rx_buffer_size);
2369 gfar_write(&regs->maxfrm, priv->rx_buffer_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002370
2371 /* If the mtu is larger than the max size for standard
2372 * ethernet frames (ie, a jumbo frame), then set maccfg2
2373 * to allow huge frames, and to check the length */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002374 tempval = gfar_read(&regs->maccfg2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002375
Anton Vorontsov7d350972010-06-30 06:39:12 +00002376 if (priv->rx_buffer_size > DEFAULT_RX_BUFFER_SIZE ||
2377 gfar_has_errata(priv, GFAR_ERRATA_74))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002378 tempval |= (MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK);
2379 else
2380 tempval &= ~(MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK);
2381
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002382 gfar_write(&regs->maccfg2, tempval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002383
2384 if ((oldsize != tempsize) && (dev->flags & IFF_UP))
2385 startup_gfar(dev);
2386
2387 return 0;
2388}
2389
Sebastian Siewiorab939902008-08-19 21:12:45 +02002390/* gfar_reset_task gets scheduled when a packet has not been
Linus Torvalds1da177e2005-04-16 15:20:36 -07002391 * transmitted after a set amount of time.
2392 * For now, assume that clearing out all the structures, and
Sebastian Siewiorab939902008-08-19 21:12:45 +02002393 * starting over will fix the problem.
2394 */
2395static void gfar_reset_task(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002396{
Sebastian Siewiorab939902008-08-19 21:12:45 +02002397 struct gfar_private *priv = container_of(work, struct gfar_private,
2398 reset_task);
Kumar Gala48268572009-03-18 23:28:22 -07002399 struct net_device *dev = priv->ndev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002400
2401 if (dev->flags & IFF_UP) {
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002402 netif_tx_stop_all_queues(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002403 stop_gfar(dev);
2404 startup_gfar(dev);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002405 netif_tx_start_all_queues(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002406 }
2407
David S. Miller263ba322008-07-15 03:47:41 -07002408 netif_tx_schedule_all(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002409}
2410
Sebastian Siewiorab939902008-08-19 21:12:45 +02002411static void gfar_timeout(struct net_device *dev)
2412{
2413 struct gfar_private *priv = netdev_priv(dev);
2414
2415 dev->stats.tx_errors++;
2416 schedule_work(&priv->reset_task);
2417}
2418
Eran Libertyacbc0f02010-07-07 15:54:54 -07002419static void gfar_align_skb(struct sk_buff *skb)
2420{
2421 /* We need the data buffer to be aligned properly. We will reserve
2422 * as many bytes as needed to align the data properly
2423 */
2424 skb_reserve(skb, RXBUF_ALIGNMENT -
2425 (((unsigned long) skb->data) & (RXBUF_ALIGNMENT - 1)));
2426}
2427
Linus Torvalds1da177e2005-04-16 15:20:36 -07002428/* Interrupt Handler for Transmit complete */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002429static int gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002430{
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002431 struct net_device *dev = tx_queue->dev;
Dai Harukid080cd62008-04-09 19:37:51 -05002432 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002433 struct gfar_priv_rx_q *rx_queue = NULL;
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002434 struct txbd8 *bdp, *next = NULL;
Dai Haruki4669bc92008-12-17 16:51:04 -08002435 struct txbd8 *lbdp = NULL;
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002436 struct txbd8 *base = tx_queue->tx_bd_base;
Dai Haruki4669bc92008-12-17 16:51:04 -08002437 struct sk_buff *skb;
2438 int skb_dirtytx;
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002439 int tx_ring_size = tx_queue->tx_ring_size;
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002440 int frags = 0, nr_txbds = 0;
Dai Haruki4669bc92008-12-17 16:51:04 -08002441 int i;
Dai Harukid080cd62008-04-09 19:37:51 -05002442 int howmany = 0;
Dai Haruki4669bc92008-12-17 16:51:04 -08002443 u32 lstatus;
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002444 size_t buflen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002445
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002446 rx_queue = priv->rx_queue[tx_queue->qindex];
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002447 bdp = tx_queue->dirty_tx;
2448 skb_dirtytx = tx_queue->skb_dirtytx;
Dai Haruki4669bc92008-12-17 16:51:04 -08002449
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002450 while ((skb = tx_queue->tx_skbuff[skb_dirtytx])) {
Anton Vorontsova3bc1f12009-11-10 14:11:10 +00002451 unsigned long flags;
2452
Dai Haruki4669bc92008-12-17 16:51:04 -08002453 frags = skb_shinfo(skb)->nr_frags;
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002454
2455 /*
2456 * When time stamping, one additional TxBD must be freed.
2457 * Also, we need to dma_unmap_single() the TxPAL.
2458 */
Oliver Hartkopp2244d072010-08-17 08:59:14 +00002459 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS))
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002460 nr_txbds = frags + 2;
2461 else
2462 nr_txbds = frags + 1;
2463
2464 lbdp = skip_txbd(bdp, nr_txbds - 1, base, tx_ring_size);
Dai Haruki4669bc92008-12-17 16:51:04 -08002465
2466 lstatus = lbdp->lstatus;
2467
2468 /* Only clean completed frames */
2469 if ((lstatus & BD_LFLAG(TXBD_READY)) &&
2470 (lstatus & BD_LENGTH_MASK))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002471 break;
2472
Oliver Hartkopp2244d072010-08-17 08:59:14 +00002473 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) {
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002474 next = next_txbd(bdp, base, tx_ring_size);
2475 buflen = next->length + GMAC_FCB_LEN;
2476 } else
2477 buflen = bdp->length;
2478
2479 dma_unmap_single(&priv->ofdev->dev, bdp->bufPtr,
2480 buflen, DMA_TO_DEVICE);
2481
Oliver Hartkopp2244d072010-08-17 08:59:14 +00002482 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) {
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002483 struct skb_shared_hwtstamps shhwtstamps;
2484 u64 *ns = (u64*) (((u32)skb->data + 0x10) & ~0x7);
2485 memset(&shhwtstamps, 0, sizeof(shhwtstamps));
2486 shhwtstamps.hwtstamp = ns_to_ktime(*ns);
2487 skb_tstamp_tx(skb, &shhwtstamps);
2488 bdp->lstatus &= BD_LFLAG(TXBD_WRAP);
2489 bdp = next;
2490 }
Dai Haruki4669bc92008-12-17 16:51:04 -08002491
2492 bdp->lstatus &= BD_LFLAG(TXBD_WRAP);
2493 bdp = next_txbd(bdp, base, tx_ring_size);
2494
2495 for (i = 0; i < frags; i++) {
Kumar Gala48268572009-03-18 23:28:22 -07002496 dma_unmap_page(&priv->ofdev->dev,
Dai Haruki4669bc92008-12-17 16:51:04 -08002497 bdp->bufPtr,
2498 bdp->length,
2499 DMA_TO_DEVICE);
2500 bdp->lstatus &= BD_LFLAG(TXBD_WRAP);
2501 bdp = next_txbd(bdp, base, tx_ring_size);
2502 }
2503
Andy Fleming0fd56bb2009-02-04 16:43:16 -08002504 /*
2505 * If there's room in the queue (limit it to rx_buffer_size)
2506 * we add this skb back into the pool, if it's the right size
2507 */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002508 if (skb_queue_len(&priv->rx_recycle) < rx_queue->rx_ring_size &&
Andy Fleming0fd56bb2009-02-04 16:43:16 -08002509 skb_recycle_check(skb, priv->rx_buffer_size +
Eran Libertyacbc0f02010-07-07 15:54:54 -07002510 RXBUF_ALIGNMENT)) {
2511 gfar_align_skb(skb);
Jarek Poplawskicd0ea242010-10-19 00:06:36 +00002512 skb_queue_head(&priv->rx_recycle, skb);
Eran Libertyacbc0f02010-07-07 15:54:54 -07002513 } else
Andy Fleming0fd56bb2009-02-04 16:43:16 -08002514 dev_kfree_skb_any(skb);
2515
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002516 tx_queue->tx_skbuff[skb_dirtytx] = NULL;
Dai Haruki4669bc92008-12-17 16:51:04 -08002517
2518 skb_dirtytx = (skb_dirtytx + 1) &
2519 TX_RING_MOD_MASK(tx_ring_size);
2520
Dai Harukid080cd62008-04-09 19:37:51 -05002521 howmany++;
Anton Vorontsova3bc1f12009-11-10 14:11:10 +00002522 spin_lock_irqsave(&tx_queue->txlock, flags);
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002523 tx_queue->num_txbdfree += nr_txbds;
Anton Vorontsova3bc1f12009-11-10 14:11:10 +00002524 spin_unlock_irqrestore(&tx_queue->txlock, flags);
Dai Haruki4669bc92008-12-17 16:51:04 -08002525 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002526
Dai Haruki4669bc92008-12-17 16:51:04 -08002527 /* If we freed a buffer, we can restart transmission, if necessary */
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002528 if (__netif_subqueue_stopped(dev, tx_queue->qindex) && tx_queue->num_txbdfree)
2529 netif_wake_subqueue(dev, tx_queue->qindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002530
Dai Haruki4669bc92008-12-17 16:51:04 -08002531 /* Update dirty indicators */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002532 tx_queue->skb_dirtytx = skb_dirtytx;
2533 tx_queue->dirty_tx = bdp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002534
Dai Harukid080cd62008-04-09 19:37:51 -05002535 return howmany;
2536}
2537
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002538static void gfar_schedule_cleanup(struct gfar_priv_grp *gfargrp)
Dai Haruki8c7396a2008-12-17 16:52:00 -08002539{
Anton Vorontsova6d0b912009-01-12 21:57:34 -08002540 unsigned long flags;
2541
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002542 spin_lock_irqsave(&gfargrp->grplock, flags);
2543 if (napi_schedule_prep(&gfargrp->napi)) {
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002544 gfar_write(&gfargrp->regs->imask, IMASK_RTX_DISABLED);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002545 __napi_schedule(&gfargrp->napi);
Jarek Poplawski8707bdd2009-02-09 14:59:30 -08002546 } else {
2547 /*
2548 * Clear IEVENT, so interrupts aren't called again
2549 * because of the packets that have already arrived.
2550 */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002551 gfar_write(&gfargrp->regs->ievent, IEVENT_RTX_MASK);
Dai Haruki8c7396a2008-12-17 16:52:00 -08002552 }
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002553 spin_unlock_irqrestore(&gfargrp->grplock, flags);
Anton Vorontsova6d0b912009-01-12 21:57:34 -08002554
Dai Haruki8c7396a2008-12-17 16:52:00 -08002555}
2556
Dai Harukid080cd62008-04-09 19:37:51 -05002557/* Interrupt Handler for Transmit complete */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002558static irqreturn_t gfar_transmit(int irq, void *grp_id)
Dai Harukid080cd62008-04-09 19:37:51 -05002559{
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002560 gfar_schedule_cleanup((struct gfar_priv_grp *)grp_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002561 return IRQ_HANDLED;
2562}
2563
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002564static void gfar_new_rxbdp(struct gfar_priv_rx_q *rx_queue, struct rxbd8 *bdp,
Andy Fleming815b97c2008-04-22 17:18:29 -05002565 struct sk_buff *skb)
2566{
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002567 struct net_device *dev = rx_queue->dev;
Andy Fleming815b97c2008-04-22 17:18:29 -05002568 struct gfar_private *priv = netdev_priv(dev);
Anton Vorontsov8a102fe2009-10-12 06:00:37 +00002569 dma_addr_t buf;
Andy Fleming815b97c2008-04-22 17:18:29 -05002570
Anton Vorontsov8a102fe2009-10-12 06:00:37 +00002571 buf = dma_map_single(&priv->ofdev->dev, skb->data,
2572 priv->rx_buffer_size, DMA_FROM_DEVICE);
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002573 gfar_init_rxbdp(rx_queue, bdp, buf);
Andy Fleming815b97c2008-04-22 17:18:29 -05002574}
2575
Eran Libertyacbc0f02010-07-07 15:54:54 -07002576static struct sk_buff * gfar_alloc_skb(struct net_device *dev)
2577{
2578 struct gfar_private *priv = netdev_priv(dev);
2579 struct sk_buff *skb = NULL;
2580
2581 skb = netdev_alloc_skb(dev, priv->rx_buffer_size + RXBUF_ALIGNMENT);
2582 if (!skb)
2583 return NULL;
2584
2585 gfar_align_skb(skb);
2586
2587 return skb;
2588}
Andy Fleming815b97c2008-04-22 17:18:29 -05002589
2590struct sk_buff * gfar_new_skb(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002591{
2592 struct gfar_private *priv = netdev_priv(dev);
2593 struct sk_buff *skb = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002594
Jarek Poplawskicd0ea242010-10-19 00:06:36 +00002595 skb = skb_dequeue(&priv->rx_recycle);
Andy Fleming0fd56bb2009-02-04 16:43:16 -08002596 if (!skb)
Eran Libertyacbc0f02010-07-07 15:54:54 -07002597 skb = gfar_alloc_skb(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002598
Linus Torvalds1da177e2005-04-16 15:20:36 -07002599 return skb;
2600}
2601
Li Yang298e1a92007-10-16 14:18:13 +08002602static inline void count_errors(unsigned short status, struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002603{
Li Yang298e1a92007-10-16 14:18:13 +08002604 struct gfar_private *priv = netdev_priv(dev);
Jeff Garzik09f75cd2007-10-03 17:41:50 -07002605 struct net_device_stats *stats = &dev->stats;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002606 struct gfar_extra_stats *estats = &priv->extra_stats;
2607
2608 /* If the packet was truncated, none of the other errors
2609 * matter */
2610 if (status & RXBD_TRUNCATED) {
2611 stats->rx_length_errors++;
2612
2613 estats->rx_trunc++;
2614
2615 return;
2616 }
2617 /* Count the errors, if there were any */
2618 if (status & (RXBD_LARGE | RXBD_SHORT)) {
2619 stats->rx_length_errors++;
2620
2621 if (status & RXBD_LARGE)
2622 estats->rx_large++;
2623 else
2624 estats->rx_short++;
2625 }
2626 if (status & RXBD_NONOCTET) {
2627 stats->rx_frame_errors++;
2628 estats->rx_nonoctet++;
2629 }
2630 if (status & RXBD_CRCERR) {
2631 estats->rx_crcerr++;
2632 stats->rx_crc_errors++;
2633 }
2634 if (status & RXBD_OVERRUN) {
2635 estats->rx_overrun++;
2636 stats->rx_crc_errors++;
2637 }
2638}
2639
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002640irqreturn_t gfar_receive(int irq, void *grp_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002641{
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002642 gfar_schedule_cleanup((struct gfar_priv_grp *)grp_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002643 return IRQ_HANDLED;
2644}
2645
Kumar Gala0bbaf062005-06-20 10:54:21 -05002646static inline void gfar_rx_checksum(struct sk_buff *skb, struct rxfcb *fcb)
2647{
2648 /* If valid headers were found, and valid sums
2649 * were verified, then we tell the kernel that no
2650 * checksumming is necessary. Otherwise, it is */
Andy Fleming7f7f5312005-11-11 12:38:59 -06002651 if ((fcb->flags & RXFCB_CSUM_MASK) == (RXFCB_CIP | RXFCB_CTU))
Kumar Gala0bbaf062005-06-20 10:54:21 -05002652 skb->ip_summed = CHECKSUM_UNNECESSARY;
2653 else
Eric Dumazetbc8acf22010-09-02 13:07:41 -07002654 skb_checksum_none_assert(skb);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002655}
2656
2657
Linus Torvalds1da177e2005-04-16 15:20:36 -07002658/* gfar_process_frame() -- handle one incoming packet if skb
2659 * isn't NULL. */
2660static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb,
Dai Haruki2c2db482008-12-16 15:31:15 -08002661 int amount_pull)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002662{
2663 struct gfar_private *priv = netdev_priv(dev);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002664 struct rxfcb *fcb = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002665
Dai Haruki2c2db482008-12-16 15:31:15 -08002666 int ret;
Kumar Gala0bbaf062005-06-20 10:54:21 -05002667
Dai Haruki2c2db482008-12-16 15:31:15 -08002668 /* fcb is at the beginning if exists */
2669 fcb = (struct rxfcb *)skb->data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002670
Dai Haruki2c2db482008-12-16 15:31:15 -08002671 /* Remove the FCB from the skb */
2672 /* Remove the padded bytes, if there are any */
Sandeep Gopalpetf74dac02009-12-24 03:13:06 +00002673 if (amount_pull) {
2674 skb_record_rx_queue(skb, fcb->rq);
Dai Haruki2c2db482008-12-16 15:31:15 -08002675 skb_pull(skb, amount_pull);
Sandeep Gopalpetf74dac02009-12-24 03:13:06 +00002676 }
Kumar Gala0bbaf062005-06-20 10:54:21 -05002677
Manfred Rudigiercc772ab2010-04-08 23:10:03 +00002678 /* Get receive timestamp from the skb */
2679 if (priv->hwts_rx_en) {
2680 struct skb_shared_hwtstamps *shhwtstamps = skb_hwtstamps(skb);
2681 u64 *ns = (u64 *) skb->data;
2682 memset(shhwtstamps, 0, sizeof(*shhwtstamps));
2683 shhwtstamps->hwtstamp = ns_to_ktime(*ns);
2684 }
2685
2686 if (priv->padding)
2687 skb_pull(skb, priv->padding);
2688
Dai Haruki2c2db482008-12-16 15:31:15 -08002689 if (priv->rx_csum_enable)
2690 gfar_rx_checksum(skb, fcb);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002691
Dai Haruki2c2db482008-12-16 15:31:15 -08002692 /* Tell the skb what kind of packet this is */
2693 skb->protocol = eth_type_trans(skb, dev);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002694
Dai Haruki2c2db482008-12-16 15:31:15 -08002695 /* Send the packet up the stack */
2696 if (unlikely(priv->vlgrp && (fcb->flags & RXFCB_VLN)))
2697 ret = vlan_hwaccel_receive_skb(skb, priv->vlgrp, fcb->vlctl);
2698 else
2699 ret = netif_receive_skb(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002700
Dai Haruki2c2db482008-12-16 15:31:15 -08002701 if (NET_RX_DROP == ret)
2702 priv->extra_stats.kernel_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002703
2704 return 0;
2705}
2706
2707/* gfar_clean_rx_ring() -- Processes each frame in the rx ring
Kumar Gala0bbaf062005-06-20 10:54:21 -05002708 * until the budget/quota has been reached. Returns the number
Linus Torvalds1da177e2005-04-16 15:20:36 -07002709 * of frames handled
2710 */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002711int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002712{
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002713 struct net_device *dev = rx_queue->dev;
Andy Fleming31de1982008-12-16 15:33:40 -08002714 struct rxbd8 *bdp, *base;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002715 struct sk_buff *skb;
Dai Haruki2c2db482008-12-16 15:31:15 -08002716 int pkt_len;
2717 int amount_pull;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002718 int howmany = 0;
2719 struct gfar_private *priv = netdev_priv(dev);
2720
2721 /* Get the first full descriptor */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002722 bdp = rx_queue->cur_rx;
2723 base = rx_queue->rx_bd_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002724
Manfred Rudigiercc772ab2010-04-08 23:10:03 +00002725 amount_pull = (gfar_uses_fcb(priv) ? GMAC_FCB_LEN : 0);
Dai Haruki2c2db482008-12-16 15:31:15 -08002726
Linus Torvalds1da177e2005-04-16 15:20:36 -07002727 while (!((bdp->status & RXBD_EMPTY) || (--rx_work_limit < 0))) {
Andy Fleming815b97c2008-04-22 17:18:29 -05002728 struct sk_buff *newskb;
Scott Wood3b6330c2007-05-16 15:06:59 -05002729 rmb();
Andy Fleming815b97c2008-04-22 17:18:29 -05002730
2731 /* Add another skb for the future */
2732 newskb = gfar_new_skb(dev);
2733
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002734 skb = rx_queue->rx_skbuff[rx_queue->skb_currx];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002735
Kumar Gala48268572009-03-18 23:28:22 -07002736 dma_unmap_single(&priv->ofdev->dev, bdp->bufPtr,
Andy Fleming81183052008-11-12 10:07:11 -06002737 priv->rx_buffer_size, DMA_FROM_DEVICE);
2738
Anton Vorontsov63b88b92010-06-11 10:51:03 +00002739 if (unlikely(!(bdp->status & RXBD_ERR) &&
2740 bdp->length > priv->rx_buffer_size))
2741 bdp->status = RXBD_LARGE;
2742
Andy Fleming815b97c2008-04-22 17:18:29 -05002743 /* We drop the frame if we failed to allocate a new buffer */
2744 if (unlikely(!newskb || !(bdp->status & RXBD_LAST) ||
2745 bdp->status & RXBD_ERR)) {
2746 count_errors(bdp->status, dev);
2747
2748 if (unlikely(!newskb))
2749 newskb = skb;
Eran Libertyacbc0f02010-07-07 15:54:54 -07002750 else if (skb)
Jarek Poplawskicd0ea242010-10-19 00:06:36 +00002751 skb_queue_head(&priv->rx_recycle, skb);
Andy Fleming815b97c2008-04-22 17:18:29 -05002752 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002753 /* Increment the number of packets */
Sandeep Gopalpeta7f38042009-12-16 01:15:07 +00002754 rx_queue->stats.rx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002755 howmany++;
2756
Dai Haruki2c2db482008-12-16 15:31:15 -08002757 if (likely(skb)) {
2758 pkt_len = bdp->length - ETH_FCS_LEN;
2759 /* Remove the FCS from the packet length */
2760 skb_put(skb, pkt_len);
Sandeep Gopalpeta7f38042009-12-16 01:15:07 +00002761 rx_queue->stats.rx_bytes += pkt_len;
Sandeep Gopalpetf74dac02009-12-24 03:13:06 +00002762 skb_record_rx_queue(skb, rx_queue->qindex);
Dai Haruki2c2db482008-12-16 15:31:15 -08002763 gfar_process_frame(dev, skb, amount_pull);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002764
Dai Haruki2c2db482008-12-16 15:31:15 -08002765 } else {
2766 if (netif_msg_rx_err(priv))
2767 printk(KERN_WARNING
2768 "%s: Missing skb!\n", dev->name);
Sandeep Gopalpeta7f38042009-12-16 01:15:07 +00002769 rx_queue->stats.rx_dropped++;
Dai Haruki2c2db482008-12-16 15:31:15 -08002770 priv->extra_stats.rx_skbmissing++;
2771 }
2772
Linus Torvalds1da177e2005-04-16 15:20:36 -07002773 }
2774
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002775 rx_queue->rx_skbuff[rx_queue->skb_currx] = newskb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002776
Andy Fleming815b97c2008-04-22 17:18:29 -05002777 /* Setup the new bdp */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002778 gfar_new_rxbdp(rx_queue, bdp, newskb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002779
2780 /* Update to the next pointer */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002781 bdp = next_bd(bdp, base, rx_queue->rx_ring_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002782
2783 /* update to point at the next skb */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002784 rx_queue->skb_currx =
2785 (rx_queue->skb_currx + 1) &
2786 RX_RING_MOD_MASK(rx_queue->rx_ring_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002787 }
2788
2789 /* Update the current rxbd pointer to be the next one */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002790 rx_queue->cur_rx = bdp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002791
Linus Torvalds1da177e2005-04-16 15:20:36 -07002792 return howmany;
2793}
2794
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002795static int gfar_poll(struct napi_struct *napi, int budget)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002796{
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002797 struct gfar_priv_grp *gfargrp = container_of(napi,
2798 struct gfar_priv_grp, napi);
2799 struct gfar_private *priv = gfargrp->priv;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00002800 struct gfar __iomem *regs = gfargrp->regs;
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002801 struct gfar_priv_tx_q *tx_queue = NULL;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002802 struct gfar_priv_rx_q *rx_queue = NULL;
2803 int rx_cleaned = 0, budget_per_queue = 0, rx_cleaned_per_queue = 0;
Anton Vorontsov18294ad2009-11-04 12:53:00 +00002804 int tx_cleaned = 0, i, left_over_budget = budget;
2805 unsigned long serviced_queues = 0;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002806 int num_queues = 0;
Dai Harukid080cd62008-04-09 19:37:51 -05002807
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002808 num_queues = gfargrp->num_rx_queues;
2809 budget_per_queue = budget/num_queues;
2810
Dai Haruki8c7396a2008-12-17 16:52:00 -08002811 /* Clear IEVENT, so interrupts aren't called again
2812 * because of the packets that have already arrived */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002813 gfar_write(&regs->ievent, IEVENT_RTX_MASK);
Dai Haruki8c7396a2008-12-17 16:52:00 -08002814
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002815 while (num_queues && left_over_budget) {
2816
2817 budget_per_queue = left_over_budget/num_queues;
2818 left_over_budget = 0;
2819
Akinobu Mita984b3f52010-03-05 13:41:37 -08002820 for_each_set_bit(i, &gfargrp->rx_bit_map, priv->num_rx_queues) {
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002821 if (test_bit(i, &serviced_queues))
2822 continue;
2823 rx_queue = priv->rx_queue[i];
2824 tx_queue = priv->tx_queue[rx_queue->qindex];
2825
Anton Vorontsova3bc1f12009-11-10 14:11:10 +00002826 tx_cleaned += gfar_clean_tx_ring(tx_queue);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002827 rx_cleaned_per_queue = gfar_clean_rx_ring(rx_queue,
2828 budget_per_queue);
2829 rx_cleaned += rx_cleaned_per_queue;
2830 if(rx_cleaned_per_queue < budget_per_queue) {
2831 left_over_budget = left_over_budget +
2832 (budget_per_queue - rx_cleaned_per_queue);
2833 set_bit(i, &serviced_queues);
2834 num_queues--;
2835 }
2836 }
Dai Harukid080cd62008-04-09 19:37:51 -05002837 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002838
Andy Fleming42199882008-12-17 16:52:30 -08002839 if (tx_cleaned)
2840 return budget;
2841
2842 if (rx_cleaned < budget) {
Ben Hutchings288379f2009-01-19 16:43:59 -08002843 napi_complete(napi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002844
2845 /* Clear the halt bit in RSTAT */
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002846 gfar_write(&regs->rstat, gfargrp->rstat);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002847
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002848 gfar_write(&regs->imask, IMASK_DEFAULT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002849
2850 /* If we are coalescing interrupts, update the timer */
2851 /* Otherwise, clear it */
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00002852 gfar_configure_coalescing(priv,
2853 gfargrp->rx_bit_map, gfargrp->tx_bit_map);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002854 }
2855
Andy Fleming42199882008-12-17 16:52:30 -08002856 return rx_cleaned;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002857}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002858
Vitaly Woolf2d71c22006-11-07 13:27:02 +03002859#ifdef CONFIG_NET_POLL_CONTROLLER
2860/*
2861 * Polling 'interrupt' - used by things like netconsole to send skbs
2862 * without having to re-enable interrupts. It's not called while
2863 * the interrupt routine is executing.
2864 */
2865static void gfar_netpoll(struct net_device *dev)
2866{
2867 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00002868 int i = 0;
Vitaly Woolf2d71c22006-11-07 13:27:02 +03002869
2870 /* If the device has multiple interrupts, run tx/rx */
Andy Flemingb31a1d82008-12-16 15:29:15 -08002871 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00002872 for (i = 0; i < priv->num_grps; i++) {
2873 disable_irq(priv->gfargrp[i].interruptTransmit);
2874 disable_irq(priv->gfargrp[i].interruptReceive);
2875 disable_irq(priv->gfargrp[i].interruptError);
2876 gfar_interrupt(priv->gfargrp[i].interruptTransmit,
2877 &priv->gfargrp[i]);
2878 enable_irq(priv->gfargrp[i].interruptError);
2879 enable_irq(priv->gfargrp[i].interruptReceive);
2880 enable_irq(priv->gfargrp[i].interruptTransmit);
2881 }
Vitaly Woolf2d71c22006-11-07 13:27:02 +03002882 } else {
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00002883 for (i = 0; i < priv->num_grps; i++) {
2884 disable_irq(priv->gfargrp[i].interruptTransmit);
2885 gfar_interrupt(priv->gfargrp[i].interruptTransmit,
2886 &priv->gfargrp[i]);
2887 enable_irq(priv->gfargrp[i].interruptTransmit);
Anton Vorontsov43de0042009-12-09 02:52:19 -08002888 }
Vitaly Woolf2d71c22006-11-07 13:27:02 +03002889 }
2890}
2891#endif
2892
Linus Torvalds1da177e2005-04-16 15:20:36 -07002893/* The interrupt handler for devices with one interrupt */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002894static irqreturn_t gfar_interrupt(int irq, void *grp_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002895{
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002896 struct gfar_priv_grp *gfargrp = grp_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002897
2898 /* Save ievent for future reference */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002899 u32 events = gfar_read(&gfargrp->regs->ievent);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002900
Linus Torvalds1da177e2005-04-16 15:20:36 -07002901 /* Check for reception */
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04002902 if (events & IEVENT_RX_MASK)
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002903 gfar_receive(irq, grp_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002904
2905 /* Check for transmit completion */
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04002906 if (events & IEVENT_TX_MASK)
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002907 gfar_transmit(irq, grp_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002908
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04002909 /* Check for errors */
2910 if (events & IEVENT_ERR_MASK)
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002911 gfar_error(irq, grp_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002912
2913 return IRQ_HANDLED;
2914}
2915
Linus Torvalds1da177e2005-04-16 15:20:36 -07002916/* Called every time the controller might need to be made
2917 * aware of new link state. The PHY code conveys this
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002918 * information through variables in the phydev structure, and this
Linus Torvalds1da177e2005-04-16 15:20:36 -07002919 * function converts those variables into the appropriate
2920 * register values, and can bring down the device if needed.
2921 */
2922static void adjust_link(struct net_device *dev)
2923{
2924 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00002925 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002926 unsigned long flags;
2927 struct phy_device *phydev = priv->phydev;
2928 int new_state = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002929
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002930 local_irq_save(flags);
2931 lock_tx_qs(priv);
2932
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002933 if (phydev->link) {
2934 u32 tempval = gfar_read(&regs->maccfg2);
Andy Fleming7f7f5312005-11-11 12:38:59 -06002935 u32 ecntrl = gfar_read(&regs->ecntrl);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002936
Linus Torvalds1da177e2005-04-16 15:20:36 -07002937 /* Now we make sure that we can be in full duplex mode.
2938 * If not, we operate in half-duplex mode. */
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002939 if (phydev->duplex != priv->oldduplex) {
2940 new_state = 1;
2941 if (!(phydev->duplex))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002942 tempval &= ~(MACCFG2_FULL_DUPLEX);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002943 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07002944 tempval |= MACCFG2_FULL_DUPLEX;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002945
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002946 priv->oldduplex = phydev->duplex;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002947 }
2948
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002949 if (phydev->speed != priv->oldspeed) {
2950 new_state = 1;
2951 switch (phydev->speed) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002952 case 1000:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002953 tempval =
2954 ((tempval & ~(MACCFG2_IF)) | MACCFG2_GMII);
Li Yangf430e492009-01-06 14:08:10 -08002955
2956 ecntrl &= ~(ECNTRL_R100);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002957 break;
2958 case 100:
2959 case 10:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002960 tempval =
2961 ((tempval & ~(MACCFG2_IF)) | MACCFG2_MII);
Andy Fleming7f7f5312005-11-11 12:38:59 -06002962
2963 /* Reduced mode distinguishes
2964 * between 10 and 100 */
2965 if (phydev->speed == SPEED_100)
2966 ecntrl |= ECNTRL_R100;
2967 else
2968 ecntrl &= ~(ECNTRL_R100);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002969 break;
2970 default:
Kumar Gala0bbaf062005-06-20 10:54:21 -05002971 if (netif_msg_link(priv))
2972 printk(KERN_WARNING
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002973 "%s: Ack! Speed (%d) is not 10/100/1000!\n",
2974 dev->name, phydev->speed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002975 break;
2976 }
2977
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002978 priv->oldspeed = phydev->speed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002979 }
2980
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002981 gfar_write(&regs->maccfg2, tempval);
Andy Fleming7f7f5312005-11-11 12:38:59 -06002982 gfar_write(&regs->ecntrl, ecntrl);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002983
Linus Torvalds1da177e2005-04-16 15:20:36 -07002984 if (!priv->oldlink) {
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002985 new_state = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002986 priv->oldlink = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002987 }
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002988 } else if (priv->oldlink) {
2989 new_state = 1;
2990 priv->oldlink = 0;
2991 priv->oldspeed = 0;
2992 priv->oldduplex = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002993 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002994
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002995 if (new_state && netif_msg_link(priv))
2996 phy_print_status(phydev);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002997 unlock_tx_qs(priv);
2998 local_irq_restore(flags);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002999}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003000
3001/* Update the hash table based on the current list of multicast
3002 * addresses we subscribe to. Also, change the promiscuity of
3003 * the device based on the flags (this function is called
3004 * whenever dev->flags is changed */
3005static void gfar_set_multi(struct net_device *dev)
3006{
Jiri Pirko22bedad2010-04-01 21:22:57 +00003007 struct netdev_hw_addr *ha;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003008 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00003009 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003010 u32 tempval;
3011
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00003012 if (dev->flags & IFF_PROMISC) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003013 /* Set RCTRL to PROM */
3014 tempval = gfar_read(&regs->rctrl);
3015 tempval |= RCTRL_PROM;
3016 gfar_write(&regs->rctrl, tempval);
3017 } else {
3018 /* Set RCTRL to not PROM */
3019 tempval = gfar_read(&regs->rctrl);
3020 tempval &= ~(RCTRL_PROM);
3021 gfar_write(&regs->rctrl, tempval);
3022 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -04003023
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00003024 if (dev->flags & IFF_ALLMULTI) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003025 /* Set the hash to rx all multicast frames */
Kumar Gala0bbaf062005-06-20 10:54:21 -05003026 gfar_write(&regs->igaddr0, 0xffffffff);
3027 gfar_write(&regs->igaddr1, 0xffffffff);
3028 gfar_write(&regs->igaddr2, 0xffffffff);
3029 gfar_write(&regs->igaddr3, 0xffffffff);
3030 gfar_write(&regs->igaddr4, 0xffffffff);
3031 gfar_write(&regs->igaddr5, 0xffffffff);
3032 gfar_write(&regs->igaddr6, 0xffffffff);
3033 gfar_write(&regs->igaddr7, 0xffffffff);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003034 gfar_write(&regs->gaddr0, 0xffffffff);
3035 gfar_write(&regs->gaddr1, 0xffffffff);
3036 gfar_write(&regs->gaddr2, 0xffffffff);
3037 gfar_write(&regs->gaddr3, 0xffffffff);
3038 gfar_write(&regs->gaddr4, 0xffffffff);
3039 gfar_write(&regs->gaddr5, 0xffffffff);
3040 gfar_write(&regs->gaddr6, 0xffffffff);
3041 gfar_write(&regs->gaddr7, 0xffffffff);
3042 } else {
Andy Fleming7f7f5312005-11-11 12:38:59 -06003043 int em_num;
3044 int idx;
3045
Linus Torvalds1da177e2005-04-16 15:20:36 -07003046 /* zero out the hash */
Kumar Gala0bbaf062005-06-20 10:54:21 -05003047 gfar_write(&regs->igaddr0, 0x0);
3048 gfar_write(&regs->igaddr1, 0x0);
3049 gfar_write(&regs->igaddr2, 0x0);
3050 gfar_write(&regs->igaddr3, 0x0);
3051 gfar_write(&regs->igaddr4, 0x0);
3052 gfar_write(&regs->igaddr5, 0x0);
3053 gfar_write(&regs->igaddr6, 0x0);
3054 gfar_write(&regs->igaddr7, 0x0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003055 gfar_write(&regs->gaddr0, 0x0);
3056 gfar_write(&regs->gaddr1, 0x0);
3057 gfar_write(&regs->gaddr2, 0x0);
3058 gfar_write(&regs->gaddr3, 0x0);
3059 gfar_write(&regs->gaddr4, 0x0);
3060 gfar_write(&regs->gaddr5, 0x0);
3061 gfar_write(&regs->gaddr6, 0x0);
3062 gfar_write(&regs->gaddr7, 0x0);
3063
Andy Fleming7f7f5312005-11-11 12:38:59 -06003064 /* If we have extended hash tables, we need to
3065 * clear the exact match registers to prepare for
3066 * setting them */
3067 if (priv->extended_hash) {
3068 em_num = GFAR_EM_NUM + 1;
3069 gfar_clear_exact_match(dev);
3070 idx = 1;
3071 } else {
3072 idx = 0;
3073 em_num = 0;
3074 }
3075
Jiri Pirko4cd24ea2010-02-08 04:30:35 +00003076 if (netdev_mc_empty(dev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003077 return;
3078
3079 /* Parse the list, and set the appropriate bits */
Jiri Pirko22bedad2010-04-01 21:22:57 +00003080 netdev_for_each_mc_addr(ha, dev) {
Andy Fleming7f7f5312005-11-11 12:38:59 -06003081 if (idx < em_num) {
Jiri Pirko22bedad2010-04-01 21:22:57 +00003082 gfar_set_mac_for_addr(dev, idx, ha->addr);
Andy Fleming7f7f5312005-11-11 12:38:59 -06003083 idx++;
3084 } else
Jiri Pirko22bedad2010-04-01 21:22:57 +00003085 gfar_set_hash_for_addr(dev, ha->addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003086 }
3087 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003088}
3089
Andy Fleming7f7f5312005-11-11 12:38:59 -06003090
3091/* Clears each of the exact match registers to zero, so they
3092 * don't interfere with normal reception */
3093static void gfar_clear_exact_match(struct net_device *dev)
3094{
3095 int idx;
Joe Perchesb6bc7652010-12-21 02:16:08 -08003096 static const u8 zero_arr[MAC_ADDR_LEN] = {0, 0, 0, 0, 0, 0};
Andy Fleming7f7f5312005-11-11 12:38:59 -06003097
3098 for(idx = 1;idx < GFAR_EM_NUM + 1;idx++)
Joe Perchesb6bc7652010-12-21 02:16:08 -08003099 gfar_set_mac_for_addr(dev, idx, zero_arr);
Andy Fleming7f7f5312005-11-11 12:38:59 -06003100}
3101
Linus Torvalds1da177e2005-04-16 15:20:36 -07003102/* Set the appropriate hash bit for the given addr */
3103/* The algorithm works like so:
3104 * 1) Take the Destination Address (ie the multicast address), and
3105 * do a CRC on it (little endian), and reverse the bits of the
3106 * result.
3107 * 2) Use the 8 most significant bits as a hash into a 256-entry
3108 * table. The table is controlled through 8 32-bit registers:
3109 * gaddr0-7. gaddr0's MSB is entry 0, and gaddr7's LSB is
3110 * gaddr7. This means that the 3 most significant bits in the
3111 * hash index which gaddr register to use, and the 5 other bits
3112 * indicate which bit (assuming an IBM numbering scheme, which
3113 * for PowerPC (tm) is usually the case) in the register holds
3114 * the entry. */
3115static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr)
3116{
3117 u32 tempval;
3118 struct gfar_private *priv = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003119 u32 result = ether_crc(MAC_ADDR_LEN, addr);
Kumar Gala0bbaf062005-06-20 10:54:21 -05003120 int width = priv->hash_width;
3121 u8 whichbit = (result >> (32 - width)) & 0x1f;
3122 u8 whichreg = result >> (32 - width + 5);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003123 u32 value = (1 << (31-whichbit));
3124
Kumar Gala0bbaf062005-06-20 10:54:21 -05003125 tempval = gfar_read(priv->hash_regs[whichreg]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003126 tempval |= value;
Kumar Gala0bbaf062005-06-20 10:54:21 -05003127 gfar_write(priv->hash_regs[whichreg], tempval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003128}
3129
Andy Fleming7f7f5312005-11-11 12:38:59 -06003130
3131/* There are multiple MAC Address register pairs on some controllers
3132 * This function sets the numth pair to a given address
3133 */
Joe Perchesb6bc7652010-12-21 02:16:08 -08003134static void gfar_set_mac_for_addr(struct net_device *dev, int num,
3135 const u8 *addr)
Andy Fleming7f7f5312005-11-11 12:38:59 -06003136{
3137 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00003138 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Andy Fleming7f7f5312005-11-11 12:38:59 -06003139 int idx;
3140 char tmpbuf[MAC_ADDR_LEN];
3141 u32 tempval;
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00003142 u32 __iomem *macptr = &regs->macstnaddr1;
Andy Fleming7f7f5312005-11-11 12:38:59 -06003143
3144 macptr += num*2;
3145
3146 /* Now copy it into the mac registers backwards, cuz */
3147 /* little endian is silly */
3148 for (idx = 0; idx < MAC_ADDR_LEN; idx++)
3149 tmpbuf[MAC_ADDR_LEN - 1 - idx] = addr[idx];
3150
3151 gfar_write(macptr, *((u32 *) (tmpbuf)));
3152
3153 tempval = *((u32 *) (tmpbuf + 4));
3154
3155 gfar_write(macptr+1, tempval);
3156}
3157
Linus Torvalds1da177e2005-04-16 15:20:36 -07003158/* GFAR error interrupt handler */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00003159static irqreturn_t gfar_error(int irq, void *grp_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003160{
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00003161 struct gfar_priv_grp *gfargrp = grp_id;
3162 struct gfar __iomem *regs = gfargrp->regs;
3163 struct gfar_private *priv= gfargrp->priv;
3164 struct net_device *dev = priv->ndev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003165
3166 /* Save ievent for future reference */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00003167 u32 events = gfar_read(&regs->ievent);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003168
3169 /* Clear IEVENT */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00003170 gfar_write(&regs->ievent, events & IEVENT_ERR_MASK);
Scott Woodd87eb122008-07-11 18:04:45 -05003171
3172 /* Magic Packet is not an error. */
Andy Flemingb31a1d82008-12-16 15:29:15 -08003173 if ((priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET) &&
Scott Woodd87eb122008-07-11 18:04:45 -05003174 (events & IEVENT_MAG))
3175 events &= ~IEVENT_MAG;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003176
3177 /* Hmm... */
Kumar Gala0bbaf062005-06-20 10:54:21 -05003178 if (netif_msg_rx_err(priv) || netif_msg_tx_err(priv))
3179 printk(KERN_DEBUG "%s: error interrupt (ievent=0x%08x imask=0x%08x)\n",
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00003180 dev->name, events, gfar_read(&regs->imask));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003181
3182 /* Update the error counters */
3183 if (events & IEVENT_TXE) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -07003184 dev->stats.tx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003185
3186 if (events & IEVENT_LC)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07003187 dev->stats.tx_window_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003188 if (events & IEVENT_CRL)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07003189 dev->stats.tx_aborted_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003190 if (events & IEVENT_XFUN) {
Anton Vorontsov836cf7f2009-11-10 14:11:08 +00003191 unsigned long flags;
3192
Kumar Gala0bbaf062005-06-20 10:54:21 -05003193 if (netif_msg_tx_err(priv))
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04003194 printk(KERN_DEBUG "%s: TX FIFO underrun, "
3195 "packet dropped.\n", dev->name);
Jeff Garzik09f75cd2007-10-03 17:41:50 -07003196 dev->stats.tx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003197 priv->extra_stats.tx_underrun++;
3198
Anton Vorontsov836cf7f2009-11-10 14:11:08 +00003199 local_irq_save(flags);
3200 lock_tx_qs(priv);
3201
Linus Torvalds1da177e2005-04-16 15:20:36 -07003202 /* Reactivate the Tx Queues */
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00003203 gfar_write(&regs->tstat, gfargrp->tstat);
Anton Vorontsov836cf7f2009-11-10 14:11:08 +00003204
3205 unlock_tx_qs(priv);
3206 local_irq_restore(flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003207 }
Kumar Gala0bbaf062005-06-20 10:54:21 -05003208 if (netif_msg_tx_err(priv))
3209 printk(KERN_DEBUG "%s: Transmit Error\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003210 }
3211 if (events & IEVENT_BSY) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -07003212 dev->stats.rx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003213 priv->extra_stats.rx_bsy++;
3214
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00003215 gfar_receive(irq, grp_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003216
Kumar Gala0bbaf062005-06-20 10:54:21 -05003217 if (netif_msg_rx_err(priv))
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04003218 printk(KERN_DEBUG "%s: busy error (rstat: %x)\n",
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00003219 dev->name, gfar_read(&regs->rstat));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003220 }
3221 if (events & IEVENT_BABR) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -07003222 dev->stats.rx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003223 priv->extra_stats.rx_babr++;
3224
Kumar Gala0bbaf062005-06-20 10:54:21 -05003225 if (netif_msg_rx_err(priv))
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04003226 printk(KERN_DEBUG "%s: babbling RX error\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003227 }
3228 if (events & IEVENT_EBERR) {
3229 priv->extra_stats.eberr++;
Kumar Gala0bbaf062005-06-20 10:54:21 -05003230 if (netif_msg_rx_err(priv))
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04003231 printk(KERN_DEBUG "%s: bus error\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003232 }
Kumar Gala0bbaf062005-06-20 10:54:21 -05003233 if ((events & IEVENT_RXC) && netif_msg_rx_status(priv))
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04003234 printk(KERN_DEBUG "%s: control frame\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003235
3236 if (events & IEVENT_BABT) {
3237 priv->extra_stats.tx_babt++;
Kumar Gala0bbaf062005-06-20 10:54:21 -05003238 if (netif_msg_tx_err(priv))
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04003239 printk(KERN_DEBUG "%s: babbling TX error\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003240 }
3241 return IRQ_HANDLED;
3242}
3243
Andy Flemingb31a1d82008-12-16 15:29:15 -08003244static struct of_device_id gfar_match[] =
3245{
3246 {
3247 .type = "network",
3248 .compatible = "gianfar",
3249 },
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00003250 {
3251 .compatible = "fsl,etsec2",
3252 },
Andy Flemingb31a1d82008-12-16 15:29:15 -08003253 {},
3254};
Anton Vorontsove72701a2009-10-14 14:54:52 -07003255MODULE_DEVICE_TABLE(of, gfar_match);
Andy Flemingb31a1d82008-12-16 15:29:15 -08003256
Linus Torvalds1da177e2005-04-16 15:20:36 -07003257/* Structure for a device driver */
Andy Flemingb31a1d82008-12-16 15:29:15 -08003258static struct of_platform_driver gfar_driver = {
Grant Likely40182942010-04-13 16:13:02 -07003259 .driver = {
3260 .name = "fsl-gianfar",
3261 .owner = THIS_MODULE,
3262 .pm = GFAR_PM_OPS,
3263 .of_match_table = gfar_match,
3264 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07003265 .probe = gfar_probe,
3266 .remove = gfar_remove,
3267};
3268
3269static int __init gfar_init(void)
3270{
Andy Fleming1577ece2009-02-04 16:42:12 -08003271 return of_register_platform_driver(&gfar_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003272}
3273
3274static void __exit gfar_exit(void)
3275{
Andy Flemingb31a1d82008-12-16 15:29:15 -08003276 of_unregister_platform_driver(&gfar_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003277}
3278
3279module_init(gfar_init);
3280module_exit(gfar_exit);
3281