Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2013 Johannes Berg <johannes@sipsolutions.net> |
| 3 | * |
| 4 | * This file is free software: you may copy, redistribute and/or modify it |
| 5 | * under the terms of the GNU General Public License as published by the |
| 6 | * Free Software Foundation, either version 2 of the License, or (at your |
| 7 | * option) any later version. |
| 8 | * |
| 9 | * This file is distributed in the hope that it will be useful, but |
| 10 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | * |
| 17 | * This file incorporates work covered by the following copyright and |
| 18 | * permission notice: |
| 19 | * |
| 20 | * Copyright (c) 2012 Qualcomm Atheros, Inc. |
| 21 | * |
| 22 | * Permission to use, copy, modify, and/or distribute this software for any |
| 23 | * purpose with or without fee is hereby granted, provided that the above |
| 24 | * copyright notice and this permission notice appear in all copies. |
| 25 | * |
| 26 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 27 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 28 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 29 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 30 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 31 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 32 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 33 | */ |
| 34 | |
| 35 | #include <linux/module.h> |
| 36 | #include <linux/pci.h> |
| 37 | #include <linux/interrupt.h> |
| 38 | #include <linux/ip.h> |
| 39 | #include <linux/ipv6.h> |
| 40 | #include <linux/if_vlan.h> |
| 41 | #include <linux/mdio.h> |
| 42 | #include <linux/aer.h> |
| 43 | #include <linux/bitops.h> |
| 44 | #include <linux/netdevice.h> |
| 45 | #include <linux/etherdevice.h> |
| 46 | #include <net/ip6_checksum.h> |
| 47 | #include <linux/crc32.h> |
| 48 | #include "alx.h" |
| 49 | #include "hw.h" |
| 50 | #include "reg.h" |
| 51 | |
| 52 | const char alx_drv_name[] = "alx"; |
| 53 | |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 54 | static void alx_free_txbuf(struct alx_tx_queue *txq, int entry) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 55 | { |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 56 | struct alx_buffer *txb = &txq->bufs[entry]; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 57 | |
| 58 | if (dma_unmap_len(txb, size)) { |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 59 | dma_unmap_single(txq->dev, |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 60 | dma_unmap_addr(txb, dma), |
| 61 | dma_unmap_len(txb, size), |
| 62 | DMA_TO_DEVICE); |
| 63 | dma_unmap_len_set(txb, size, 0); |
| 64 | } |
| 65 | |
| 66 | if (txb->skb) { |
| 67 | dev_kfree_skb_any(txb->skb); |
| 68 | txb->skb = NULL; |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | static int alx_refill_rx_ring(struct alx_priv *alx, gfp_t gfp) |
| 73 | { |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 74 | struct alx_rx_queue *rxq = alx->qnapi[0]->rxq; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 75 | struct sk_buff *skb; |
| 76 | struct alx_buffer *cur_buf; |
| 77 | dma_addr_t dma; |
| 78 | u16 cur, next, count = 0; |
| 79 | |
| 80 | next = cur = rxq->write_idx; |
| 81 | if (++next == alx->rx_ringsz) |
| 82 | next = 0; |
| 83 | cur_buf = &rxq->bufs[cur]; |
| 84 | |
| 85 | while (!cur_buf->skb && next != rxq->read_idx) { |
| 86 | struct alx_rfd *rfd = &rxq->rfd[cur]; |
| 87 | |
Feng Tang | 881d032 | 2016-06-12 17:36:37 +0800 | [diff] [blame] | 88 | /* |
| 89 | * When DMA RX address is set to something like |
| 90 | * 0x....fc0, it will be very likely to cause DMA |
| 91 | * RFD overflow issue. |
| 92 | * |
| 93 | * To work around it, we apply rx skb with 64 bytes |
| 94 | * longer space, and offset the address whenever |
| 95 | * 0x....fc0 is detected. |
| 96 | */ |
| 97 | skb = __netdev_alloc_skb(alx->dev, alx->rxbuf_size + 64, gfp); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 98 | if (!skb) |
| 99 | break; |
Feng Tang | 881d032 | 2016-06-12 17:36:37 +0800 | [diff] [blame] | 100 | |
| 101 | if (((unsigned long)skb->data & 0xfff) == 0xfc0) |
| 102 | skb_reserve(skb, 64); |
| 103 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 104 | dma = dma_map_single(&alx->hw.pdev->dev, |
| 105 | skb->data, alx->rxbuf_size, |
| 106 | DMA_FROM_DEVICE); |
| 107 | if (dma_mapping_error(&alx->hw.pdev->dev, dma)) { |
| 108 | dev_kfree_skb(skb); |
| 109 | break; |
| 110 | } |
| 111 | |
| 112 | /* Unfortunately, RX descriptor buffers must be 4-byte |
| 113 | * aligned, so we can't use IP alignment. |
| 114 | */ |
| 115 | if (WARN_ON(dma & 3)) { |
| 116 | dev_kfree_skb(skb); |
| 117 | break; |
| 118 | } |
| 119 | |
| 120 | cur_buf->skb = skb; |
| 121 | dma_unmap_len_set(cur_buf, size, alx->rxbuf_size); |
| 122 | dma_unmap_addr_set(cur_buf, dma, dma); |
| 123 | rfd->addr = cpu_to_le64(dma); |
| 124 | |
| 125 | cur = next; |
| 126 | if (++next == alx->rx_ringsz) |
| 127 | next = 0; |
| 128 | cur_buf = &rxq->bufs[cur]; |
| 129 | count++; |
| 130 | } |
| 131 | |
| 132 | if (count) { |
| 133 | /* flush all updates before updating hardware */ |
| 134 | wmb(); |
| 135 | rxq->write_idx = cur; |
| 136 | alx_write_mem16(&alx->hw, ALX_RFD_PIDX, cur); |
| 137 | } |
| 138 | |
| 139 | return count; |
| 140 | } |
| 141 | |
Tobias Regnery | 2e06826 | 2016-11-15 12:43:14 +0100 | [diff] [blame] | 142 | static struct alx_tx_queue *alx_tx_queue_mapping(struct alx_priv *alx, |
| 143 | struct sk_buff *skb) |
| 144 | { |
| 145 | unsigned int r_idx = skb->queue_mapping; |
| 146 | |
| 147 | if (r_idx >= alx->num_txq) |
| 148 | r_idx = r_idx % alx->num_txq; |
| 149 | |
| 150 | return alx->qnapi[r_idx]->txq; |
| 151 | } |
| 152 | |
| 153 | static struct netdev_queue *alx_get_tx_queue(const struct alx_tx_queue *txq) |
| 154 | { |
| 155 | return netdev_get_tx_queue(txq->netdev, txq->queue_idx); |
| 156 | } |
| 157 | |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 158 | static inline int alx_tpd_avail(struct alx_tx_queue *txq) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 159 | { |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 160 | if (txq->write_idx >= txq->read_idx) |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 161 | return txq->count + txq->read_idx - txq->write_idx - 1; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 162 | return txq->read_idx - txq->write_idx - 1; |
| 163 | } |
| 164 | |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 165 | static bool alx_clean_tx_irq(struct alx_tx_queue *txq) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 166 | { |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 167 | struct alx_priv *alx; |
Tobias Regnery | 2e06826 | 2016-11-15 12:43:14 +0100 | [diff] [blame] | 168 | struct netdev_queue *tx_queue; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 169 | u16 hw_read_idx, sw_read_idx; |
| 170 | unsigned int total_bytes = 0, total_packets = 0; |
| 171 | int budget = ALX_DEFAULT_TX_WORK; |
| 172 | |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 173 | alx = netdev_priv(txq->netdev); |
Tobias Regnery | 2e06826 | 2016-11-15 12:43:14 +0100 | [diff] [blame] | 174 | tx_queue = alx_get_tx_queue(txq); |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 175 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 176 | sw_read_idx = txq->read_idx; |
Tobias Regnery | 2e06826 | 2016-11-15 12:43:14 +0100 | [diff] [blame] | 177 | hw_read_idx = alx_read_mem16(&alx->hw, txq->c_reg); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 178 | |
| 179 | if (sw_read_idx != hw_read_idx) { |
| 180 | while (sw_read_idx != hw_read_idx && budget > 0) { |
| 181 | struct sk_buff *skb; |
| 182 | |
| 183 | skb = txq->bufs[sw_read_idx].skb; |
| 184 | if (skb) { |
| 185 | total_bytes += skb->len; |
| 186 | total_packets++; |
| 187 | budget--; |
| 188 | } |
| 189 | |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 190 | alx_free_txbuf(txq, sw_read_idx); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 191 | |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 192 | if (++sw_read_idx == txq->count) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 193 | sw_read_idx = 0; |
| 194 | } |
| 195 | txq->read_idx = sw_read_idx; |
| 196 | |
Tobias Regnery | 2e06826 | 2016-11-15 12:43:14 +0100 | [diff] [blame] | 197 | netdev_tx_completed_queue(tx_queue, total_packets, total_bytes); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 198 | } |
| 199 | |
Tobias Regnery | 2e06826 | 2016-11-15 12:43:14 +0100 | [diff] [blame] | 200 | if (netif_tx_queue_stopped(tx_queue) && netif_carrier_ok(alx->dev) && |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 201 | alx_tpd_avail(txq) > txq->count / 4) |
Tobias Regnery | 2e06826 | 2016-11-15 12:43:14 +0100 | [diff] [blame] | 202 | netif_tx_wake_queue(tx_queue); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 203 | |
| 204 | return sw_read_idx == hw_read_idx; |
| 205 | } |
| 206 | |
| 207 | static void alx_schedule_link_check(struct alx_priv *alx) |
| 208 | { |
| 209 | schedule_work(&alx->link_check_wk); |
| 210 | } |
| 211 | |
| 212 | static void alx_schedule_reset(struct alx_priv *alx) |
| 213 | { |
| 214 | schedule_work(&alx->reset_wk); |
| 215 | } |
| 216 | |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 217 | static int alx_clean_rx_irq(struct alx_rx_queue *rxq, int budget) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 218 | { |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 219 | struct alx_priv *alx; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 220 | struct alx_rrd *rrd; |
| 221 | struct alx_buffer *rxb; |
| 222 | struct sk_buff *skb; |
| 223 | u16 length, rfd_cleaned = 0; |
Eric Dumazet | 7a05dc6 | 2015-01-11 10:32:18 -0800 | [diff] [blame] | 224 | int work = 0; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 225 | |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 226 | alx = netdev_priv(rxq->netdev); |
| 227 | |
Eric Dumazet | 7a05dc6 | 2015-01-11 10:32:18 -0800 | [diff] [blame] | 228 | while (work < budget) { |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 229 | rrd = &rxq->rrd[rxq->rrd_read_idx]; |
| 230 | if (!(rrd->word3 & cpu_to_le32(1 << RRD_UPDATED_SHIFT))) |
| 231 | break; |
| 232 | rrd->word3 &= ~cpu_to_le32(1 << RRD_UPDATED_SHIFT); |
| 233 | |
| 234 | if (ALX_GET_FIELD(le32_to_cpu(rrd->word0), |
| 235 | RRD_SI) != rxq->read_idx || |
| 236 | ALX_GET_FIELD(le32_to_cpu(rrd->word0), |
| 237 | RRD_NOR) != 1) { |
| 238 | alx_schedule_reset(alx); |
Eric Dumazet | 7a05dc6 | 2015-01-11 10:32:18 -0800 | [diff] [blame] | 239 | return work; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 240 | } |
| 241 | |
| 242 | rxb = &rxq->bufs[rxq->read_idx]; |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 243 | dma_unmap_single(rxq->dev, |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 244 | dma_unmap_addr(rxb, dma), |
| 245 | dma_unmap_len(rxb, size), |
| 246 | DMA_FROM_DEVICE); |
| 247 | dma_unmap_len_set(rxb, size, 0); |
| 248 | skb = rxb->skb; |
| 249 | rxb->skb = NULL; |
| 250 | |
| 251 | if (rrd->word3 & cpu_to_le32(1 << RRD_ERR_RES_SHIFT) || |
| 252 | rrd->word3 & cpu_to_le32(1 << RRD_ERR_LEN_SHIFT)) { |
| 253 | rrd->word3 = 0; |
| 254 | dev_kfree_skb_any(skb); |
| 255 | goto next_pkt; |
| 256 | } |
| 257 | |
| 258 | length = ALX_GET_FIELD(le32_to_cpu(rrd->word3), |
| 259 | RRD_PKTLEN) - ETH_FCS_LEN; |
| 260 | skb_put(skb, length); |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 261 | skb->protocol = eth_type_trans(skb, rxq->netdev); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 262 | |
| 263 | skb_checksum_none_assert(skb); |
| 264 | if (alx->dev->features & NETIF_F_RXCSUM && |
| 265 | !(rrd->word3 & (cpu_to_le32(1 << RRD_ERR_L4_SHIFT) | |
| 266 | cpu_to_le32(1 << RRD_ERR_IPV4_SHIFT)))) { |
| 267 | switch (ALX_GET_FIELD(le32_to_cpu(rrd->word2), |
| 268 | RRD_PID)) { |
| 269 | case RRD_PID_IPV6UDP: |
| 270 | case RRD_PID_IPV4UDP: |
| 271 | case RRD_PID_IPV4TCP: |
| 272 | case RRD_PID_IPV6TCP: |
| 273 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 274 | break; |
| 275 | } |
| 276 | } |
| 277 | |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 278 | napi_gro_receive(&rxq->np->napi, skb); |
Eric Dumazet | 7a05dc6 | 2015-01-11 10:32:18 -0800 | [diff] [blame] | 279 | work++; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 280 | |
| 281 | next_pkt: |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 282 | if (++rxq->read_idx == rxq->count) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 283 | rxq->read_idx = 0; |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 284 | if (++rxq->rrd_read_idx == rxq->count) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 285 | rxq->rrd_read_idx = 0; |
| 286 | |
| 287 | if (++rfd_cleaned > ALX_RX_ALLOC_THRESH) |
| 288 | rfd_cleaned -= alx_refill_rx_ring(alx, GFP_ATOMIC); |
| 289 | } |
| 290 | |
| 291 | if (rfd_cleaned) |
| 292 | alx_refill_rx_ring(alx, GFP_ATOMIC); |
| 293 | |
Eric Dumazet | 7a05dc6 | 2015-01-11 10:32:18 -0800 | [diff] [blame] | 294 | return work; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 295 | } |
| 296 | |
| 297 | static int alx_poll(struct napi_struct *napi, int budget) |
| 298 | { |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 299 | struct alx_napi *np = container_of(napi, struct alx_napi, napi); |
| 300 | struct alx_priv *alx = np->alx; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 301 | struct alx_hw *hw = &alx->hw; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 302 | unsigned long flags; |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 303 | bool tx_complete = true; |
| 304 | int work = 0; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 305 | |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 306 | if (np->txq) |
| 307 | tx_complete = alx_clean_tx_irq(np->txq); |
| 308 | if (np->rxq) |
| 309 | work = alx_clean_rx_irq(np->rxq, budget); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 310 | |
Eric Dumazet | 7a05dc6 | 2015-01-11 10:32:18 -0800 | [diff] [blame] | 311 | if (!tx_complete || work == budget) |
| 312 | return budget; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 313 | |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 314 | napi_complete(&np->napi); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 315 | |
| 316 | /* enable interrupt */ |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 317 | if (alx->flags & ALX_FLAG_USING_MSIX) { |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 318 | alx_mask_msix(hw, np->vec_idx, false); |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 319 | } else { |
| 320 | spin_lock_irqsave(&alx->irq_lock, flags); |
| 321 | alx->int_mask |= ALX_ISR_TX_Q0 | ALX_ISR_RX_Q0; |
| 322 | alx_write_mem32(hw, ALX_IMR, alx->int_mask); |
| 323 | spin_unlock_irqrestore(&alx->irq_lock, flags); |
| 324 | } |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 325 | |
| 326 | alx_post_write(hw); |
| 327 | |
Eric Dumazet | 7a05dc6 | 2015-01-11 10:32:18 -0800 | [diff] [blame] | 328 | return work; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 329 | } |
| 330 | |
Tobias Regnery | a0373ae | 2016-09-09 12:19:53 +0200 | [diff] [blame] | 331 | static bool alx_intr_handle_misc(struct alx_priv *alx, u32 intr) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 332 | { |
| 333 | struct alx_hw *hw = &alx->hw; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 334 | |
| 335 | if (intr & ALX_ISR_FATAL) { |
| 336 | netif_warn(alx, hw, alx->dev, |
| 337 | "fatal interrupt 0x%x, resetting\n", intr); |
| 338 | alx_schedule_reset(alx); |
Tobias Regnery | a0373ae | 2016-09-09 12:19:53 +0200 | [diff] [blame] | 339 | return true; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 340 | } |
| 341 | |
| 342 | if (intr & ALX_ISR_ALERT) |
| 343 | netdev_warn(alx->dev, "alert interrupt: 0x%x\n", intr); |
| 344 | |
| 345 | if (intr & ALX_ISR_PHY) { |
| 346 | /* suppress PHY interrupt, because the source |
| 347 | * is from PHY internal. only the internal status |
| 348 | * is cleared, the interrupt status could be cleared. |
| 349 | */ |
| 350 | alx->int_mask &= ~ALX_ISR_PHY; |
Tobias Regnery | a0373ae | 2016-09-09 12:19:53 +0200 | [diff] [blame] | 351 | alx_write_mem32(hw, ALX_IMR, alx->int_mask); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 352 | alx_schedule_link_check(alx); |
| 353 | } |
| 354 | |
Tobias Regnery | a0373ae | 2016-09-09 12:19:53 +0200 | [diff] [blame] | 355 | return false; |
| 356 | } |
| 357 | |
| 358 | static irqreturn_t alx_intr_handle(struct alx_priv *alx, u32 intr) |
| 359 | { |
| 360 | struct alx_hw *hw = &alx->hw; |
| 361 | |
| 362 | spin_lock(&alx->irq_lock); |
| 363 | |
| 364 | /* ACK interrupt */ |
| 365 | alx_write_mem32(hw, ALX_ISR, intr | ALX_ISR_DIS); |
| 366 | intr &= alx->int_mask; |
| 367 | |
| 368 | if (alx_intr_handle_misc(alx, intr)) |
| 369 | goto out; |
| 370 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 371 | if (intr & (ALX_ISR_TX_Q0 | ALX_ISR_RX_Q0)) { |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 372 | napi_schedule(&alx->qnapi[0]->napi); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 373 | /* mask rx/tx interrupt, enable them when napi complete */ |
| 374 | alx->int_mask &= ~ALX_ISR_ALL_QUEUES; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 375 | alx_write_mem32(hw, ALX_IMR, alx->int_mask); |
Tobias Regnery | a0373ae | 2016-09-09 12:19:53 +0200 | [diff] [blame] | 376 | } |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 377 | |
| 378 | alx_write_mem32(hw, ALX_ISR, 0); |
| 379 | |
| 380 | out: |
| 381 | spin_unlock(&alx->irq_lock); |
| 382 | return IRQ_HANDLED; |
| 383 | } |
| 384 | |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 385 | static irqreturn_t alx_intr_msix_ring(int irq, void *data) |
| 386 | { |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 387 | struct alx_napi *np = data; |
| 388 | struct alx_hw *hw = &np->alx->hw; |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 389 | |
| 390 | /* mask interrupt to ACK chip */ |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 391 | alx_mask_msix(hw, np->vec_idx, true); |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 392 | /* clear interrupt status */ |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 393 | alx_write_mem32(hw, ALX_ISR, np->vec_mask); |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 394 | |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 395 | napi_schedule(&np->napi); |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 396 | |
| 397 | return IRQ_HANDLED; |
| 398 | } |
| 399 | |
| 400 | static irqreturn_t alx_intr_msix_misc(int irq, void *data) |
| 401 | { |
| 402 | struct alx_priv *alx = data; |
| 403 | struct alx_hw *hw = &alx->hw; |
| 404 | u32 intr; |
| 405 | |
| 406 | /* mask interrupt to ACK chip */ |
| 407 | alx_mask_msix(hw, 0, true); |
| 408 | |
| 409 | /* read interrupt status */ |
| 410 | intr = alx_read_mem32(hw, ALX_ISR); |
| 411 | intr &= (alx->int_mask & ~ALX_ISR_ALL_QUEUES); |
| 412 | |
| 413 | if (alx_intr_handle_misc(alx, intr)) |
| 414 | return IRQ_HANDLED; |
| 415 | |
| 416 | /* clear interrupt status */ |
| 417 | alx_write_mem32(hw, ALX_ISR, intr); |
| 418 | |
| 419 | /* enable interrupt again */ |
| 420 | alx_mask_msix(hw, 0, false); |
| 421 | |
| 422 | return IRQ_HANDLED; |
| 423 | } |
| 424 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 425 | static irqreturn_t alx_intr_msi(int irq, void *data) |
| 426 | { |
| 427 | struct alx_priv *alx = data; |
| 428 | |
| 429 | return alx_intr_handle(alx, alx_read_mem32(&alx->hw, ALX_ISR)); |
| 430 | } |
| 431 | |
| 432 | static irqreturn_t alx_intr_legacy(int irq, void *data) |
| 433 | { |
| 434 | struct alx_priv *alx = data; |
| 435 | struct alx_hw *hw = &alx->hw; |
| 436 | u32 intr; |
| 437 | |
| 438 | intr = alx_read_mem32(hw, ALX_ISR); |
| 439 | |
| 440 | if (intr & ALX_ISR_DIS || !(intr & alx->int_mask)) |
| 441 | return IRQ_NONE; |
| 442 | |
| 443 | return alx_intr_handle(alx, intr); |
| 444 | } |
| 445 | |
Tobias Regnery | a4076d3 | 2016-11-15 12:43:13 +0100 | [diff] [blame] | 446 | static const u16 txring_header_reg[] = {ALX_TPD_PRI0_ADDR_LO, |
| 447 | ALX_TPD_PRI1_ADDR_LO, |
| 448 | ALX_TPD_PRI2_ADDR_LO, |
| 449 | ALX_TPD_PRI3_ADDR_LO}; |
| 450 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 451 | static void alx_init_ring_ptrs(struct alx_priv *alx) |
| 452 | { |
| 453 | struct alx_hw *hw = &alx->hw; |
| 454 | u32 addr_hi = ((u64)alx->descmem.dma) >> 32; |
Tobias Regnery | a4076d3 | 2016-11-15 12:43:13 +0100 | [diff] [blame] | 455 | struct alx_napi *np; |
| 456 | int i; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 457 | |
Tobias Regnery | a4076d3 | 2016-11-15 12:43:13 +0100 | [diff] [blame] | 458 | for (i = 0; i < alx->num_napi; i++) { |
| 459 | np = alx->qnapi[i]; |
| 460 | if (np->txq) { |
| 461 | np->txq->read_idx = 0; |
| 462 | np->txq->write_idx = 0; |
| 463 | alx_write_mem32(hw, |
| 464 | txring_header_reg[np->txq->queue_idx], |
| 465 | np->txq->tpd_dma); |
| 466 | } |
| 467 | |
| 468 | if (np->rxq) { |
| 469 | np->rxq->read_idx = 0; |
| 470 | np->rxq->write_idx = 0; |
| 471 | np->rxq->rrd_read_idx = 0; |
| 472 | alx_write_mem32(hw, ALX_RRD_ADDR_LO, np->rxq->rrd_dma); |
| 473 | alx_write_mem32(hw, ALX_RFD_ADDR_LO, np->rxq->rfd_dma); |
| 474 | } |
| 475 | } |
| 476 | |
| 477 | alx_write_mem32(hw, ALX_TX_BASE_ADDR_HI, addr_hi); |
| 478 | alx_write_mem32(hw, ALX_TPD_RING_SZ, alx->tx_ringsz); |
| 479 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 480 | alx_write_mem32(hw, ALX_RX_BASE_ADDR_HI, addr_hi); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 481 | alx_write_mem32(hw, ALX_RRD_RING_SZ, alx->rx_ringsz); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 482 | alx_write_mem32(hw, ALX_RFD_RING_SZ, alx->rx_ringsz); |
| 483 | alx_write_mem32(hw, ALX_RFD_BUF_SZ, alx->rxbuf_size); |
| 484 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 485 | /* load these pointers into the chip */ |
| 486 | alx_write_mem32(hw, ALX_SRAM9, ALX_SRAM_LOAD_PTR); |
| 487 | } |
| 488 | |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 489 | static void alx_free_txring_buf(struct alx_tx_queue *txq) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 490 | { |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 491 | int i; |
| 492 | |
| 493 | if (!txq->bufs) |
| 494 | return; |
| 495 | |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 496 | for (i = 0; i < txq->count; i++) |
| 497 | alx_free_txbuf(txq, i); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 498 | |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 499 | memset(txq->bufs, 0, txq->count * sizeof(struct alx_buffer)); |
| 500 | memset(txq->tpd, 0, txq->count * sizeof(struct alx_txd)); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 501 | txq->write_idx = 0; |
| 502 | txq->read_idx = 0; |
| 503 | |
Tobias Regnery | 2e06826 | 2016-11-15 12:43:14 +0100 | [diff] [blame] | 504 | netdev_tx_reset_queue(alx_get_tx_queue(txq)); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 505 | } |
| 506 | |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 507 | static void alx_free_rxring_buf(struct alx_rx_queue *rxq) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 508 | { |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 509 | struct alx_buffer *cur_buf; |
| 510 | u16 i; |
| 511 | |
Tobias Regnery | a4076d3 | 2016-11-15 12:43:13 +0100 | [diff] [blame] | 512 | if (!rxq->bufs) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 513 | return; |
| 514 | |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 515 | for (i = 0; i < rxq->count; i++) { |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 516 | cur_buf = rxq->bufs + i; |
| 517 | if (cur_buf->skb) { |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 518 | dma_unmap_single(rxq->dev, |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 519 | dma_unmap_addr(cur_buf, dma), |
| 520 | dma_unmap_len(cur_buf, size), |
| 521 | DMA_FROM_DEVICE); |
| 522 | dev_kfree_skb(cur_buf->skb); |
| 523 | cur_buf->skb = NULL; |
| 524 | dma_unmap_len_set(cur_buf, size, 0); |
| 525 | dma_unmap_addr_set(cur_buf, dma, 0); |
| 526 | } |
| 527 | } |
| 528 | |
| 529 | rxq->write_idx = 0; |
| 530 | rxq->read_idx = 0; |
| 531 | rxq->rrd_read_idx = 0; |
| 532 | } |
| 533 | |
| 534 | static void alx_free_buffers(struct alx_priv *alx) |
| 535 | { |
Tobias Regnery | a4076d3 | 2016-11-15 12:43:13 +0100 | [diff] [blame] | 536 | int i; |
| 537 | |
| 538 | for (i = 0; i < alx->num_txq; i++) |
| 539 | if (alx->qnapi[i] && alx->qnapi[i]->txq) |
| 540 | alx_free_txring_buf(alx->qnapi[i]->txq); |
| 541 | |
| 542 | if (alx->qnapi[0] && alx->qnapi[0]->rxq) |
| 543 | alx_free_rxring_buf(alx->qnapi[0]->rxq); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 544 | } |
| 545 | |
| 546 | static int alx_reinit_rings(struct alx_priv *alx) |
| 547 | { |
| 548 | alx_free_buffers(alx); |
| 549 | |
| 550 | alx_init_ring_ptrs(alx); |
| 551 | |
| 552 | if (!alx_refill_rx_ring(alx, GFP_KERNEL)) |
| 553 | return -ENOMEM; |
| 554 | |
| 555 | return 0; |
| 556 | } |
| 557 | |
| 558 | static void alx_add_mc_addr(struct alx_hw *hw, const u8 *addr, u32 *mc_hash) |
| 559 | { |
| 560 | u32 crc32, bit, reg; |
| 561 | |
| 562 | crc32 = ether_crc(ETH_ALEN, addr); |
| 563 | reg = (crc32 >> 31) & 0x1; |
| 564 | bit = (crc32 >> 26) & 0x1F; |
| 565 | |
| 566 | mc_hash[reg] |= BIT(bit); |
| 567 | } |
| 568 | |
| 569 | static void __alx_set_rx_mode(struct net_device *netdev) |
| 570 | { |
| 571 | struct alx_priv *alx = netdev_priv(netdev); |
| 572 | struct alx_hw *hw = &alx->hw; |
| 573 | struct netdev_hw_addr *ha; |
| 574 | u32 mc_hash[2] = {}; |
| 575 | |
| 576 | if (!(netdev->flags & IFF_ALLMULTI)) { |
| 577 | netdev_for_each_mc_addr(ha, netdev) |
| 578 | alx_add_mc_addr(hw, ha->addr, mc_hash); |
| 579 | |
| 580 | alx_write_mem32(hw, ALX_HASH_TBL0, mc_hash[0]); |
| 581 | alx_write_mem32(hw, ALX_HASH_TBL1, mc_hash[1]); |
| 582 | } |
| 583 | |
| 584 | hw->rx_ctrl &= ~(ALX_MAC_CTRL_MULTIALL_EN | ALX_MAC_CTRL_PROMISC_EN); |
| 585 | if (netdev->flags & IFF_PROMISC) |
| 586 | hw->rx_ctrl |= ALX_MAC_CTRL_PROMISC_EN; |
| 587 | if (netdev->flags & IFF_ALLMULTI) |
| 588 | hw->rx_ctrl |= ALX_MAC_CTRL_MULTIALL_EN; |
| 589 | |
| 590 | alx_write_mem32(hw, ALX_MAC_CTRL, hw->rx_ctrl); |
| 591 | } |
| 592 | |
| 593 | static void alx_set_rx_mode(struct net_device *netdev) |
| 594 | { |
| 595 | __alx_set_rx_mode(netdev); |
| 596 | } |
| 597 | |
| 598 | static int alx_set_mac_address(struct net_device *netdev, void *data) |
| 599 | { |
| 600 | struct alx_priv *alx = netdev_priv(netdev); |
| 601 | struct alx_hw *hw = &alx->hw; |
| 602 | struct sockaddr *addr = data; |
| 603 | |
| 604 | if (!is_valid_ether_addr(addr->sa_data)) |
| 605 | return -EADDRNOTAVAIL; |
| 606 | |
| 607 | if (netdev->addr_assign_type & NET_ADDR_RANDOM) |
| 608 | netdev->addr_assign_type ^= NET_ADDR_RANDOM; |
| 609 | |
| 610 | memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); |
| 611 | memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len); |
| 612 | alx_set_macaddr(hw, hw->mac_addr); |
| 613 | |
| 614 | return 0; |
| 615 | } |
| 616 | |
Tobias Regnery | 8c2a4c8 | 2016-11-15 12:43:08 +0100 | [diff] [blame] | 617 | static int alx_alloc_tx_ring(struct alx_priv *alx, struct alx_tx_queue *txq, |
| 618 | int offset) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 619 | { |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 620 | txq->bufs = kcalloc(txq->count, sizeof(struct alx_buffer), GFP_KERNEL); |
Tobias Regnery | 8c2a4c8 | 2016-11-15 12:43:08 +0100 | [diff] [blame] | 621 | if (!txq->bufs) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 622 | return -ENOMEM; |
| 623 | |
Tobias Regnery | 8c2a4c8 | 2016-11-15 12:43:08 +0100 | [diff] [blame] | 624 | txq->tpd = alx->descmem.virt + offset; |
| 625 | txq->tpd_dma = alx->descmem.dma + offset; |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 626 | offset += sizeof(struct alx_txd) * txq->count; |
Tobias Regnery | 8c2a4c8 | 2016-11-15 12:43:08 +0100 | [diff] [blame] | 627 | |
| 628 | return offset; |
| 629 | } |
| 630 | |
| 631 | static int alx_alloc_rx_ring(struct alx_priv *alx, struct alx_rx_queue *rxq, |
| 632 | int offset) |
| 633 | { |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 634 | rxq->bufs = kcalloc(rxq->count, sizeof(struct alx_buffer), GFP_KERNEL); |
Tobias Regnery | 8c2a4c8 | 2016-11-15 12:43:08 +0100 | [diff] [blame] | 635 | if (!rxq->bufs) |
| 636 | return -ENOMEM; |
| 637 | |
| 638 | rxq->rrd = alx->descmem.virt + offset; |
| 639 | rxq->rrd_dma = alx->descmem.dma + offset; |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 640 | offset += sizeof(struct alx_rrd) * rxq->count; |
Tobias Regnery | 8c2a4c8 | 2016-11-15 12:43:08 +0100 | [diff] [blame] | 641 | |
| 642 | rxq->rfd = alx->descmem.virt + offset; |
| 643 | rxq->rfd_dma = alx->descmem.dma + offset; |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 644 | offset += sizeof(struct alx_rfd) * rxq->count; |
Tobias Regnery | 8c2a4c8 | 2016-11-15 12:43:08 +0100 | [diff] [blame] | 645 | |
| 646 | return offset; |
| 647 | } |
| 648 | |
| 649 | static int alx_alloc_rings(struct alx_priv *alx) |
| 650 | { |
Tobias Regnery | a4076d3 | 2016-11-15 12:43:13 +0100 | [diff] [blame] | 651 | int i, offset = 0; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 652 | |
| 653 | /* physical tx/rx ring descriptors |
| 654 | * |
| 655 | * Allocate them as a single chunk because they must not cross a |
| 656 | * 4G boundary (hardware has a single register for high 32 bits |
| 657 | * of addresses only) |
| 658 | */ |
Tobias Regnery | a4076d3 | 2016-11-15 12:43:13 +0100 | [diff] [blame] | 659 | alx->descmem.size = sizeof(struct alx_txd) * alx->tx_ringsz * |
| 660 | alx->num_txq + |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 661 | sizeof(struct alx_rrd) * alx->rx_ringsz + |
| 662 | sizeof(struct alx_rfd) * alx->rx_ringsz; |
| 663 | alx->descmem.virt = dma_zalloc_coherent(&alx->hw.pdev->dev, |
| 664 | alx->descmem.size, |
| 665 | &alx->descmem.dma, |
| 666 | GFP_KERNEL); |
| 667 | if (!alx->descmem.virt) |
Tobias Regnery | 8c2a4c8 | 2016-11-15 12:43:08 +0100 | [diff] [blame] | 668 | return -ENOMEM; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 669 | |
Tobias Regnery | 8c2a4c8 | 2016-11-15 12:43:08 +0100 | [diff] [blame] | 670 | /* alignment requirements */ |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 671 | BUILD_BUG_ON(sizeof(struct alx_txd) % 8); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 672 | BUILD_BUG_ON(sizeof(struct alx_rrd) % 8); |
| 673 | |
Tobias Regnery | a4076d3 | 2016-11-15 12:43:13 +0100 | [diff] [blame] | 674 | for (i = 0; i < alx->num_txq; i++) { |
| 675 | offset = alx_alloc_tx_ring(alx, alx->qnapi[i]->txq, offset); |
| 676 | if (offset < 0) { |
| 677 | netdev_err(alx->dev, "Allocation of tx buffer failed!\n"); |
| 678 | return -ENOMEM; |
| 679 | } |
Tobias Regnery | 8c2a4c8 | 2016-11-15 12:43:08 +0100 | [diff] [blame] | 680 | } |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 681 | |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 682 | offset = alx_alloc_rx_ring(alx, alx->qnapi[0]->rxq, offset); |
Tobias Regnery | 8c2a4c8 | 2016-11-15 12:43:08 +0100 | [diff] [blame] | 683 | if (offset < 0) { |
| 684 | netdev_err(alx->dev, "Allocation of rx buffer failed!\n"); |
Tobias Regnery | b099922 | 2016-11-15 12:43:10 +0100 | [diff] [blame] | 685 | return -ENOMEM; |
Tobias Regnery | 8c2a4c8 | 2016-11-15 12:43:08 +0100 | [diff] [blame] | 686 | } |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 687 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 688 | return 0; |
| 689 | } |
| 690 | |
| 691 | static void alx_free_rings(struct alx_priv *alx) |
| 692 | { |
Tobias Regnery | a4076d3 | 2016-11-15 12:43:13 +0100 | [diff] [blame] | 693 | int i; |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 694 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 695 | alx_free_buffers(alx); |
| 696 | |
Tobias Regnery | a4076d3 | 2016-11-15 12:43:13 +0100 | [diff] [blame] | 697 | for (i = 0; i < alx->num_txq; i++) |
| 698 | if (alx->qnapi[i] && alx->qnapi[i]->txq) |
| 699 | kfree(alx->qnapi[i]->txq->bufs); |
| 700 | |
| 701 | if (alx->qnapi[0] && alx->qnapi[0]->rxq) |
| 702 | kfree(alx->qnapi[0]->rxq->bufs); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 703 | |
Tobias Regnery | f1db5c1 | 2017-01-24 14:34:22 +0100 | [diff] [blame] | 704 | if (alx->descmem.virt) |
Tobias Regnery | b099922 | 2016-11-15 12:43:10 +0100 | [diff] [blame] | 705 | dma_free_coherent(&alx->hw.pdev->dev, |
| 706 | alx->descmem.size, |
| 707 | alx->descmem.virt, |
| 708 | alx->descmem.dma); |
| 709 | } |
| 710 | |
| 711 | static void alx_free_napis(struct alx_priv *alx) |
| 712 | { |
| 713 | struct alx_napi *np; |
Tobias Regnery | a4076d3 | 2016-11-15 12:43:13 +0100 | [diff] [blame] | 714 | int i; |
Tobias Regnery | b099922 | 2016-11-15 12:43:10 +0100 | [diff] [blame] | 715 | |
Tobias Regnery | a4076d3 | 2016-11-15 12:43:13 +0100 | [diff] [blame] | 716 | for (i = 0; i < alx->num_napi; i++) { |
| 717 | np = alx->qnapi[i]; |
| 718 | if (!np) |
| 719 | continue; |
Tobias Regnery | b099922 | 2016-11-15 12:43:10 +0100 | [diff] [blame] | 720 | |
Tobias Regnery | a4076d3 | 2016-11-15 12:43:13 +0100 | [diff] [blame] | 721 | netif_napi_del(&np->napi); |
| 722 | kfree(np->txq); |
| 723 | kfree(np->rxq); |
| 724 | kfree(np); |
| 725 | alx->qnapi[i] = NULL; |
| 726 | } |
Tobias Regnery | b099922 | 2016-11-15 12:43:10 +0100 | [diff] [blame] | 727 | } |
| 728 | |
Tobias Regnery | 2e06826 | 2016-11-15 12:43:14 +0100 | [diff] [blame] | 729 | static const u16 tx_pidx_reg[] = {ALX_TPD_PRI0_PIDX, ALX_TPD_PRI1_PIDX, |
| 730 | ALX_TPD_PRI2_PIDX, ALX_TPD_PRI3_PIDX}; |
| 731 | static const u16 tx_cidx_reg[] = {ALX_TPD_PRI0_CIDX, ALX_TPD_PRI1_CIDX, |
| 732 | ALX_TPD_PRI2_CIDX, ALX_TPD_PRI3_CIDX}; |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 733 | static const u32 tx_vect_mask[] = {ALX_ISR_TX_Q0, ALX_ISR_TX_Q1, |
| 734 | ALX_ISR_TX_Q2, ALX_ISR_TX_Q3}; |
| 735 | static const u32 rx_vect_mask[] = {ALX_ISR_RX_Q0, ALX_ISR_RX_Q1, |
| 736 | ALX_ISR_RX_Q2, ALX_ISR_RX_Q3, |
| 737 | ALX_ISR_RX_Q4, ALX_ISR_RX_Q5, |
| 738 | ALX_ISR_RX_Q6, ALX_ISR_RX_Q7}; |
| 739 | |
Tobias Regnery | b099922 | 2016-11-15 12:43:10 +0100 | [diff] [blame] | 740 | static int alx_alloc_napis(struct alx_priv *alx) |
| 741 | { |
| 742 | struct alx_napi *np; |
| 743 | struct alx_rx_queue *rxq; |
| 744 | struct alx_tx_queue *txq; |
Tobias Regnery | a4076d3 | 2016-11-15 12:43:13 +0100 | [diff] [blame] | 745 | int i; |
Tobias Regnery | b099922 | 2016-11-15 12:43:10 +0100 | [diff] [blame] | 746 | |
| 747 | alx->int_mask &= ~ALX_ISR_ALL_QUEUES; |
Tobias Regnery | b099922 | 2016-11-15 12:43:10 +0100 | [diff] [blame] | 748 | |
| 749 | /* allocate alx_napi structures */ |
Tobias Regnery | a4076d3 | 2016-11-15 12:43:13 +0100 | [diff] [blame] | 750 | for (i = 0; i < alx->num_napi; i++) { |
| 751 | np = kzalloc(sizeof(struct alx_napi), GFP_KERNEL); |
| 752 | if (!np) |
| 753 | goto err_out; |
Tobias Regnery | b099922 | 2016-11-15 12:43:10 +0100 | [diff] [blame] | 754 | |
Tobias Regnery | a4076d3 | 2016-11-15 12:43:13 +0100 | [diff] [blame] | 755 | np->alx = alx; |
| 756 | netif_napi_add(alx->dev, &np->napi, alx_poll, 64); |
| 757 | alx->qnapi[i] = np; |
| 758 | } |
Tobias Regnery | b099922 | 2016-11-15 12:43:10 +0100 | [diff] [blame] | 759 | |
| 760 | /* allocate tx queues */ |
Tobias Regnery | a4076d3 | 2016-11-15 12:43:13 +0100 | [diff] [blame] | 761 | for (i = 0; i < alx->num_txq; i++) { |
| 762 | np = alx->qnapi[i]; |
| 763 | txq = kzalloc(sizeof(*txq), GFP_KERNEL); |
| 764 | if (!txq) |
| 765 | goto err_out; |
Tobias Regnery | b099922 | 2016-11-15 12:43:10 +0100 | [diff] [blame] | 766 | |
Tobias Regnery | a4076d3 | 2016-11-15 12:43:13 +0100 | [diff] [blame] | 767 | np->txq = txq; |
Tobias Regnery | 2e06826 | 2016-11-15 12:43:14 +0100 | [diff] [blame] | 768 | txq->p_reg = tx_pidx_reg[i]; |
| 769 | txq->c_reg = tx_cidx_reg[i]; |
Tobias Regnery | a4076d3 | 2016-11-15 12:43:13 +0100 | [diff] [blame] | 770 | txq->queue_idx = i; |
| 771 | txq->count = alx->tx_ringsz; |
| 772 | txq->netdev = alx->dev; |
| 773 | txq->dev = &alx->hw.pdev->dev; |
| 774 | np->vec_mask |= tx_vect_mask[i]; |
| 775 | alx->int_mask |= tx_vect_mask[i]; |
| 776 | } |
Tobias Regnery | b099922 | 2016-11-15 12:43:10 +0100 | [diff] [blame] | 777 | |
| 778 | /* allocate rx queues */ |
| 779 | np = alx->qnapi[0]; |
| 780 | rxq = kzalloc(sizeof(*rxq), GFP_KERNEL); |
| 781 | if (!rxq) |
| 782 | goto err_out; |
| 783 | |
| 784 | np->rxq = rxq; |
| 785 | rxq->np = alx->qnapi[0]; |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 786 | rxq->queue_idx = 0; |
Tobias Regnery | b099922 | 2016-11-15 12:43:10 +0100 | [diff] [blame] | 787 | rxq->count = alx->rx_ringsz; |
| 788 | rxq->netdev = alx->dev; |
| 789 | rxq->dev = &alx->hw.pdev->dev; |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 790 | np->vec_mask |= rx_vect_mask[0]; |
| 791 | alx->int_mask |= rx_vect_mask[0]; |
Tobias Regnery | b099922 | 2016-11-15 12:43:10 +0100 | [diff] [blame] | 792 | |
| 793 | return 0; |
| 794 | |
| 795 | err_out: |
| 796 | netdev_err(alx->dev, "error allocating internal structures\n"); |
| 797 | alx_free_napis(alx); |
| 798 | return -ENOMEM; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 799 | } |
| 800 | |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 801 | static const int txq_vec_mapping_shift[] = { |
| 802 | 0, ALX_MSI_MAP_TBL1_TXQ0_SHIFT, |
| 803 | 0, ALX_MSI_MAP_TBL1_TXQ1_SHIFT, |
| 804 | 1, ALX_MSI_MAP_TBL2_TXQ2_SHIFT, |
| 805 | 1, ALX_MSI_MAP_TBL2_TXQ3_SHIFT, |
| 806 | }; |
| 807 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 808 | static void alx_config_vector_mapping(struct alx_priv *alx) |
| 809 | { |
| 810 | struct alx_hw *hw = &alx->hw; |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 811 | u32 tbl[2] = {0, 0}; |
| 812 | int i, vector, idx, shift; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 813 | |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 814 | if (alx->flags & ALX_FLAG_USING_MSIX) { |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 815 | /* tx mappings */ |
| 816 | for (i = 0, vector = 1; i < alx->num_txq; i++, vector++) { |
| 817 | idx = txq_vec_mapping_shift[i * 2]; |
| 818 | shift = txq_vec_mapping_shift[i * 2 + 1]; |
| 819 | tbl[idx] |= vector << shift; |
| 820 | } |
| 821 | |
| 822 | /* rx mapping */ |
| 823 | tbl[0] |= 1 << ALX_MSI_MAP_TBL1_RXQ0_SHIFT; |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 824 | } |
| 825 | |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 826 | alx_write_mem32(hw, ALX_MSI_MAP_TBL1, tbl[0]); |
| 827 | alx_write_mem32(hw, ALX_MSI_MAP_TBL2, tbl[1]); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 828 | alx_write_mem32(hw, ALX_MSI_ID_MAP, 0); |
| 829 | } |
| 830 | |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 831 | static bool alx_enable_msix(struct alx_priv *alx) |
| 832 | { |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 833 | int i, err, num_vec, num_txq, num_rxq; |
| 834 | |
Tobias Regnery | d768319 | 2016-11-15 12:43:16 +0100 | [diff] [blame] | 835 | num_txq = min_t(int, num_online_cpus(), ALX_MAX_TX_QUEUES); |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 836 | num_rxq = 1; |
| 837 | num_vec = max_t(int, num_txq, num_rxq) + 1; |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 838 | |
| 839 | alx->msix_entries = kcalloc(num_vec, sizeof(struct msix_entry), |
| 840 | GFP_KERNEL); |
| 841 | if (!alx->msix_entries) { |
| 842 | netdev_warn(alx->dev, "Allocation of msix entries failed!\n"); |
| 843 | return false; |
| 844 | } |
| 845 | |
| 846 | for (i = 0; i < num_vec; i++) |
| 847 | alx->msix_entries[i].entry = i; |
| 848 | |
| 849 | err = pci_enable_msix(alx->hw.pdev, alx->msix_entries, num_vec); |
| 850 | if (err) { |
| 851 | kfree(alx->msix_entries); |
| 852 | netdev_warn(alx->dev, "Enabling MSI-X interrupts failed!\n"); |
| 853 | return false; |
| 854 | } |
| 855 | |
| 856 | alx->num_vec = num_vec; |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 857 | alx->num_napi = num_vec - 1; |
| 858 | alx->num_txq = num_txq; |
| 859 | alx->num_rxq = num_rxq; |
| 860 | |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 861 | return true; |
| 862 | } |
| 863 | |
| 864 | static int alx_request_msix(struct alx_priv *alx) |
| 865 | { |
| 866 | struct net_device *netdev = alx->dev; |
| 867 | int i, err, vector = 0, free_vector = 0; |
| 868 | |
| 869 | err = request_irq(alx->msix_entries[0].vector, alx_intr_msix_misc, |
| 870 | 0, netdev->name, alx); |
| 871 | if (err) |
| 872 | goto out_err; |
| 873 | |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 874 | for (i = 0; i < alx->num_napi; i++) { |
| 875 | struct alx_napi *np = alx->qnapi[i]; |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 876 | |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 877 | vector++; |
| 878 | |
| 879 | if (np->txq && np->rxq) |
| 880 | sprintf(np->irq_lbl, "%s-TxRx-%u", netdev->name, |
| 881 | np->txq->queue_idx); |
| 882 | else if (np->txq) |
| 883 | sprintf(np->irq_lbl, "%s-tx-%u", netdev->name, |
| 884 | np->txq->queue_idx); |
| 885 | else if (np->rxq) |
| 886 | sprintf(np->irq_lbl, "%s-rx-%u", netdev->name, |
| 887 | np->rxq->queue_idx); |
| 888 | else |
| 889 | sprintf(np->irq_lbl, "%s-unused", netdev->name); |
| 890 | |
| 891 | np->vec_idx = vector; |
| 892 | err = request_irq(alx->msix_entries[vector].vector, |
| 893 | alx_intr_msix_ring, 0, np->irq_lbl, np); |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 894 | if (err) |
| 895 | goto out_free; |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 896 | } |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 897 | return 0; |
| 898 | |
| 899 | out_free: |
| 900 | free_irq(alx->msix_entries[free_vector++].vector, alx); |
| 901 | |
| 902 | vector--; |
| 903 | for (i = 0; i < vector; i++) |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 904 | free_irq(alx->msix_entries[free_vector++].vector, |
| 905 | alx->qnapi[i]); |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 906 | |
| 907 | out_err: |
| 908 | return err; |
| 909 | } |
| 910 | |
Tobias Regnery | 9ee7b68 | 2016-09-09 12:19:52 +0200 | [diff] [blame] | 911 | static void alx_init_intr(struct alx_priv *alx, bool msix) |
| 912 | { |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 913 | if (msix) { |
| 914 | if (alx_enable_msix(alx)) |
| 915 | alx->flags |= ALX_FLAG_USING_MSIX; |
| 916 | } |
| 917 | |
Tobias Regnery | 9ee7b68 | 2016-09-09 12:19:52 +0200 | [diff] [blame] | 918 | if (!(alx->flags & ALX_FLAG_USING_MSIX)) { |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 919 | alx->num_vec = 1; |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 920 | alx->num_napi = 1; |
| 921 | alx->num_txq = 1; |
| 922 | alx->num_rxq = 1; |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 923 | |
Tobias Regnery | 9ee7b68 | 2016-09-09 12:19:52 +0200 | [diff] [blame] | 924 | if (!pci_enable_msi(alx->hw.pdev)) |
| 925 | alx->flags |= ALX_FLAG_USING_MSI; |
| 926 | } |
| 927 | } |
| 928 | |
| 929 | static void alx_disable_advanced_intr(struct alx_priv *alx) |
| 930 | { |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 931 | if (alx->flags & ALX_FLAG_USING_MSIX) { |
| 932 | kfree(alx->msix_entries); |
| 933 | pci_disable_msix(alx->hw.pdev); |
| 934 | alx->flags &= ~ALX_FLAG_USING_MSIX; |
| 935 | } |
| 936 | |
Tobias Regnery | 9ee7b68 | 2016-09-09 12:19:52 +0200 | [diff] [blame] | 937 | if (alx->flags & ALX_FLAG_USING_MSI) { |
| 938 | pci_disable_msi(alx->hw.pdev); |
| 939 | alx->flags &= ~ALX_FLAG_USING_MSI; |
| 940 | } |
| 941 | } |
| 942 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 943 | static void alx_irq_enable(struct alx_priv *alx) |
| 944 | { |
| 945 | struct alx_hw *hw = &alx->hw; |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 946 | int i; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 947 | |
| 948 | /* level-1 interrupt switch */ |
| 949 | alx_write_mem32(hw, ALX_ISR, 0); |
| 950 | alx_write_mem32(hw, ALX_IMR, alx->int_mask); |
| 951 | alx_post_write(hw); |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 952 | |
| 953 | if (alx->flags & ALX_FLAG_USING_MSIX) |
| 954 | /* enable all msix irqs */ |
| 955 | for (i = 0; i < alx->num_vec; i++) |
| 956 | alx_mask_msix(hw, i, false); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 957 | } |
| 958 | |
| 959 | static void alx_irq_disable(struct alx_priv *alx) |
| 960 | { |
| 961 | struct alx_hw *hw = &alx->hw; |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 962 | int i; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 963 | |
| 964 | alx_write_mem32(hw, ALX_ISR, ALX_ISR_DIS); |
| 965 | alx_write_mem32(hw, ALX_IMR, 0); |
| 966 | alx_post_write(hw); |
| 967 | |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 968 | if (alx->flags & ALX_FLAG_USING_MSIX) { |
| 969 | for (i = 0; i < alx->num_vec; i++) { |
| 970 | alx_mask_msix(hw, i, true); |
| 971 | synchronize_irq(alx->msix_entries[i].vector); |
| 972 | } |
| 973 | } else { |
| 974 | synchronize_irq(alx->hw.pdev->irq); |
| 975 | } |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 976 | } |
| 977 | |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 978 | static int alx_realloc_resources(struct alx_priv *alx) |
| 979 | { |
| 980 | int err; |
| 981 | |
| 982 | alx_free_rings(alx); |
| 983 | alx_free_napis(alx); |
| 984 | alx_disable_advanced_intr(alx); |
Tobias Regnery | 37187a0 | 2017-01-24 14:34:23 +0100 | [diff] [blame] | 985 | alx_init_intr(alx, false); |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 986 | |
| 987 | err = alx_alloc_napis(alx); |
| 988 | if (err) |
| 989 | return err; |
| 990 | |
| 991 | err = alx_alloc_rings(alx); |
| 992 | if (err) |
| 993 | return err; |
| 994 | |
| 995 | return 0; |
| 996 | } |
| 997 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 998 | static int alx_request_irq(struct alx_priv *alx) |
| 999 | { |
| 1000 | struct pci_dev *pdev = alx->hw.pdev; |
| 1001 | struct alx_hw *hw = &alx->hw; |
| 1002 | int err; |
| 1003 | u32 msi_ctrl; |
| 1004 | |
| 1005 | msi_ctrl = (hw->imt >> 1) << ALX_MSI_RETRANS_TM_SHIFT; |
| 1006 | |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 1007 | if (alx->flags & ALX_FLAG_USING_MSIX) { |
| 1008 | alx_write_mem32(hw, ALX_MSI_RETRANS_TIMER, msi_ctrl); |
| 1009 | err = alx_request_msix(alx); |
| 1010 | if (!err) |
| 1011 | goto out; |
| 1012 | |
| 1013 | /* msix request failed, realloc resources */ |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 1014 | err = alx_realloc_resources(alx); |
| 1015 | if (err) |
| 1016 | goto out; |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 1017 | } |
| 1018 | |
Tobias Regnery | 9ee7b68 | 2016-09-09 12:19:52 +0200 | [diff] [blame] | 1019 | if (alx->flags & ALX_FLAG_USING_MSI) { |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1020 | alx_write_mem32(hw, ALX_MSI_RETRANS_TIMER, |
| 1021 | msi_ctrl | ALX_MSI_MASK_SEL_LINE); |
| 1022 | err = request_irq(pdev->irq, alx_intr_msi, 0, |
| 1023 | alx->dev->name, alx); |
| 1024 | if (!err) |
| 1025 | goto out; |
| 1026 | /* fall back to legacy interrupt */ |
Tobias Regnery | 9ee7b68 | 2016-09-09 12:19:52 +0200 | [diff] [blame] | 1027 | alx->flags &= ~ALX_FLAG_USING_MSI; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1028 | pci_disable_msi(alx->hw.pdev); |
| 1029 | } |
| 1030 | |
| 1031 | alx_write_mem32(hw, ALX_MSI_RETRANS_TIMER, 0); |
| 1032 | err = request_irq(pdev->irq, alx_intr_legacy, IRQF_SHARED, |
| 1033 | alx->dev->name, alx); |
| 1034 | out: |
| 1035 | if (!err) |
| 1036 | alx_config_vector_mapping(alx); |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 1037 | else |
| 1038 | netdev_err(alx->dev, "IRQ registration failed!\n"); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1039 | return err; |
| 1040 | } |
| 1041 | |
| 1042 | static void alx_free_irq(struct alx_priv *alx) |
| 1043 | { |
| 1044 | struct pci_dev *pdev = alx->hw.pdev; |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 1045 | int i, vector = 0; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1046 | |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 1047 | if (alx->flags & ALX_FLAG_USING_MSIX) { |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 1048 | free_irq(alx->msix_entries[vector++].vector, alx); |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 1049 | for (i = 0; i < alx->num_napi; i++) |
| 1050 | free_irq(alx->msix_entries[vector++].vector, |
| 1051 | alx->qnapi[i]); |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 1052 | } else { |
| 1053 | free_irq(pdev->irq, alx); |
| 1054 | } |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1055 | |
Tobias Regnery | 9ee7b68 | 2016-09-09 12:19:52 +0200 | [diff] [blame] | 1056 | alx_disable_advanced_intr(alx); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1057 | } |
| 1058 | |
| 1059 | static int alx_identify_hw(struct alx_priv *alx) |
| 1060 | { |
| 1061 | struct alx_hw *hw = &alx->hw; |
| 1062 | int rev = alx_hw_revision(hw); |
| 1063 | |
| 1064 | if (rev > ALX_REV_C0) |
| 1065 | return -EINVAL; |
| 1066 | |
| 1067 | hw->max_dma_chnl = rev >= ALX_REV_B0 ? 4 : 2; |
| 1068 | |
| 1069 | return 0; |
| 1070 | } |
| 1071 | |
| 1072 | static int alx_init_sw(struct alx_priv *alx) |
| 1073 | { |
| 1074 | struct pci_dev *pdev = alx->hw.pdev; |
| 1075 | struct alx_hw *hw = &alx->hw; |
| 1076 | int err; |
| 1077 | |
| 1078 | err = alx_identify_hw(alx); |
| 1079 | if (err) { |
| 1080 | dev_err(&pdev->dev, "unrecognized chip, aborting\n"); |
| 1081 | return err; |
| 1082 | } |
| 1083 | |
| 1084 | alx->hw.lnk_patch = |
| 1085 | pdev->device == ALX_DEV_ID_AR8161 && |
| 1086 | pdev->subsystem_vendor == PCI_VENDOR_ID_ATTANSIC && |
| 1087 | pdev->subsystem_device == 0x0091 && |
| 1088 | pdev->revision == 0; |
| 1089 | |
| 1090 | hw->smb_timer = 400; |
| 1091 | hw->mtu = alx->dev->mtu; |
Jarod Wilson | c406700 | 2016-01-06 09:36:37 -0500 | [diff] [blame] | 1092 | alx->rxbuf_size = ALX_MAX_FRAME_LEN(hw->mtu); |
Jarod Wilson | 67bef94 | 2016-10-17 15:54:03 -0400 | [diff] [blame] | 1093 | /* MTU range: 34 - 9256 */ |
| 1094 | alx->dev->min_mtu = 34; |
| 1095 | alx->dev->max_mtu = ALX_MAX_FRAME_LEN(ALX_MAX_FRAME_SIZE); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1096 | alx->tx_ringsz = 256; |
| 1097 | alx->rx_ringsz = 512; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1098 | hw->imt = 200; |
| 1099 | alx->int_mask = ALX_ISR_MISC; |
| 1100 | hw->dma_chnl = hw->max_dma_chnl; |
| 1101 | hw->ith_tpd = alx->tx_ringsz / 3; |
| 1102 | hw->link_speed = SPEED_UNKNOWN; |
Johannes Berg | a5b87cc | 2013-06-29 19:23:17 +0200 | [diff] [blame] | 1103 | hw->duplex = DUPLEX_UNKNOWN; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1104 | hw->adv_cfg = ADVERTISED_Autoneg | |
| 1105 | ADVERTISED_10baseT_Half | |
| 1106 | ADVERTISED_10baseT_Full | |
| 1107 | ADVERTISED_100baseT_Full | |
| 1108 | ADVERTISED_100baseT_Half | |
| 1109 | ADVERTISED_1000baseT_Full; |
| 1110 | hw->flowctrl = ALX_FC_ANEG | ALX_FC_RX | ALX_FC_TX; |
| 1111 | |
| 1112 | hw->rx_ctrl = ALX_MAC_CTRL_WOLSPED_SWEN | |
| 1113 | ALX_MAC_CTRL_MHASH_ALG_HI5B | |
| 1114 | ALX_MAC_CTRL_BRD_EN | |
| 1115 | ALX_MAC_CTRL_PCRCE | |
| 1116 | ALX_MAC_CTRL_CRCE | |
| 1117 | ALX_MAC_CTRL_RXFC_EN | |
| 1118 | ALX_MAC_CTRL_TXFC_EN | |
| 1119 | 7 << ALX_MAC_CTRL_PRMBLEN_SHIFT; |
| 1120 | |
| 1121 | return err; |
| 1122 | } |
| 1123 | |
| 1124 | |
| 1125 | static netdev_features_t alx_fix_features(struct net_device *netdev, |
| 1126 | netdev_features_t features) |
| 1127 | { |
| 1128 | if (netdev->mtu > ALX_MAX_TSO_PKT_SIZE) |
| 1129 | features &= ~(NETIF_F_TSO | NETIF_F_TSO6); |
| 1130 | |
| 1131 | return features; |
| 1132 | } |
| 1133 | |
| 1134 | static void alx_netif_stop(struct alx_priv *alx) |
| 1135 | { |
Tobias Regnery | a4076d3 | 2016-11-15 12:43:13 +0100 | [diff] [blame] | 1136 | int i; |
| 1137 | |
Florian Westphal | 860e953 | 2016-05-03 16:33:13 +0200 | [diff] [blame] | 1138 | netif_trans_update(alx->dev); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1139 | if (netif_carrier_ok(alx->dev)) { |
| 1140 | netif_carrier_off(alx->dev); |
| 1141 | netif_tx_disable(alx->dev); |
Tobias Regnery | a4076d3 | 2016-11-15 12:43:13 +0100 | [diff] [blame] | 1142 | for (i = 0; i < alx->num_napi; i++) |
| 1143 | napi_disable(&alx->qnapi[i]->napi); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1144 | } |
| 1145 | } |
| 1146 | |
| 1147 | static void alx_halt(struct alx_priv *alx) |
| 1148 | { |
| 1149 | struct alx_hw *hw = &alx->hw; |
| 1150 | |
| 1151 | alx_netif_stop(alx); |
| 1152 | hw->link_speed = SPEED_UNKNOWN; |
Johannes Berg | a5b87cc | 2013-06-29 19:23:17 +0200 | [diff] [blame] | 1153 | hw->duplex = DUPLEX_UNKNOWN; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1154 | |
| 1155 | alx_reset_mac(hw); |
| 1156 | |
| 1157 | /* disable l0s/l1 */ |
| 1158 | alx_enable_aspm(hw, false, false); |
| 1159 | alx_irq_disable(alx); |
| 1160 | alx_free_buffers(alx); |
| 1161 | } |
| 1162 | |
| 1163 | static void alx_configure(struct alx_priv *alx) |
| 1164 | { |
| 1165 | struct alx_hw *hw = &alx->hw; |
| 1166 | |
| 1167 | alx_configure_basic(hw); |
| 1168 | alx_disable_rss(hw); |
| 1169 | __alx_set_rx_mode(alx->dev); |
| 1170 | |
| 1171 | alx_write_mem32(hw, ALX_MAC_CTRL, hw->rx_ctrl); |
| 1172 | } |
| 1173 | |
| 1174 | static void alx_activate(struct alx_priv *alx) |
| 1175 | { |
| 1176 | /* hardware setting lost, restore it */ |
| 1177 | alx_reinit_rings(alx); |
| 1178 | alx_configure(alx); |
| 1179 | |
| 1180 | /* clear old interrupts */ |
| 1181 | alx_write_mem32(&alx->hw, ALX_ISR, ~(u32)ALX_ISR_DIS); |
| 1182 | |
| 1183 | alx_irq_enable(alx); |
| 1184 | |
| 1185 | alx_schedule_link_check(alx); |
| 1186 | } |
| 1187 | |
| 1188 | static void alx_reinit(struct alx_priv *alx) |
| 1189 | { |
| 1190 | ASSERT_RTNL(); |
| 1191 | |
| 1192 | alx_halt(alx); |
| 1193 | alx_activate(alx); |
| 1194 | } |
| 1195 | |
| 1196 | static int alx_change_mtu(struct net_device *netdev, int mtu) |
| 1197 | { |
| 1198 | struct alx_priv *alx = netdev_priv(netdev); |
Jarod Wilson | c406700 | 2016-01-06 09:36:37 -0500 | [diff] [blame] | 1199 | int max_frame = ALX_MAX_FRAME_LEN(mtu); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1200 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1201 | netdev->mtu = mtu; |
| 1202 | alx->hw.mtu = mtu; |
Jarod Wilson | c406700 | 2016-01-06 09:36:37 -0500 | [diff] [blame] | 1203 | alx->rxbuf_size = max(max_frame, ALX_DEF_RXBUF_SIZE); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1204 | netdev_update_features(netdev); |
| 1205 | if (netif_running(netdev)) |
| 1206 | alx_reinit(alx); |
| 1207 | return 0; |
| 1208 | } |
| 1209 | |
| 1210 | static void alx_netif_start(struct alx_priv *alx) |
| 1211 | { |
Tobias Regnery | a4076d3 | 2016-11-15 12:43:13 +0100 | [diff] [blame] | 1212 | int i; |
| 1213 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1214 | netif_tx_wake_all_queues(alx->dev); |
Tobias Regnery | a4076d3 | 2016-11-15 12:43:13 +0100 | [diff] [blame] | 1215 | for (i = 0; i < alx->num_napi; i++) |
| 1216 | napi_enable(&alx->qnapi[i]->napi); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1217 | netif_carrier_on(alx->dev); |
| 1218 | } |
| 1219 | |
| 1220 | static int __alx_open(struct alx_priv *alx, bool resume) |
| 1221 | { |
| 1222 | int err; |
| 1223 | |
Tobias Regnery | f58e0f7 | 2016-11-15 12:43:15 +0100 | [diff] [blame] | 1224 | alx_init_intr(alx, true); |
Tobias Regnery | 9ee7b68 | 2016-09-09 12:19:52 +0200 | [diff] [blame] | 1225 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1226 | if (!resume) |
| 1227 | netif_carrier_off(alx->dev); |
| 1228 | |
Tobias Regnery | b099922 | 2016-11-15 12:43:10 +0100 | [diff] [blame] | 1229 | err = alx_alloc_napis(alx); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1230 | if (err) |
Tobias Regnery | 0ca4e20 | 2016-09-13 12:06:57 +0200 | [diff] [blame] | 1231 | goto out_disable_adv_intr; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1232 | |
Tobias Regnery | b099922 | 2016-11-15 12:43:10 +0100 | [diff] [blame] | 1233 | err = alx_alloc_rings(alx); |
| 1234 | if (err) |
| 1235 | goto out_free_rings; |
| 1236 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1237 | alx_configure(alx); |
| 1238 | |
| 1239 | err = alx_request_irq(alx); |
| 1240 | if (err) |
| 1241 | goto out_free_rings; |
| 1242 | |
Tobias Regnery | 185acee | 2017-01-24 14:34:24 +0100 | [diff] [blame] | 1243 | /* must be called after alx_request_irq because the chip stops working |
| 1244 | * if we copy the dma addresses in alx_init_ring_ptrs twice when |
| 1245 | * requesting msi-x interrupts failed |
| 1246 | */ |
| 1247 | alx_reinit_rings(alx); |
| 1248 | |
Tobias Regnery | d768319 | 2016-11-15 12:43:16 +0100 | [diff] [blame] | 1249 | netif_set_real_num_tx_queues(alx->dev, alx->num_txq); |
| 1250 | netif_set_real_num_rx_queues(alx->dev, alx->num_rxq); |
| 1251 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1252 | /* clear old interrupts */ |
| 1253 | alx_write_mem32(&alx->hw, ALX_ISR, ~(u32)ALX_ISR_DIS); |
| 1254 | |
| 1255 | alx_irq_enable(alx); |
| 1256 | |
| 1257 | if (!resume) |
| 1258 | netif_tx_start_all_queues(alx->dev); |
| 1259 | |
| 1260 | alx_schedule_link_check(alx); |
| 1261 | return 0; |
| 1262 | |
| 1263 | out_free_rings: |
| 1264 | alx_free_rings(alx); |
Tobias Regnery | b099922 | 2016-11-15 12:43:10 +0100 | [diff] [blame] | 1265 | alx_free_napis(alx); |
Tobias Regnery | 0ca4e20 | 2016-09-13 12:06:57 +0200 | [diff] [blame] | 1266 | out_disable_adv_intr: |
| 1267 | alx_disable_advanced_intr(alx); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1268 | return err; |
| 1269 | } |
| 1270 | |
| 1271 | static void __alx_stop(struct alx_priv *alx) |
| 1272 | { |
| 1273 | alx_halt(alx); |
| 1274 | alx_free_irq(alx); |
| 1275 | alx_free_rings(alx); |
Tobias Regnery | b099922 | 2016-11-15 12:43:10 +0100 | [diff] [blame] | 1276 | alx_free_napis(alx); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1277 | } |
| 1278 | |
Johannes Berg | a5b87cc | 2013-06-29 19:23:17 +0200 | [diff] [blame] | 1279 | static const char *alx_speed_desc(struct alx_hw *hw) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1280 | { |
Johannes Berg | a5b87cc | 2013-06-29 19:23:17 +0200 | [diff] [blame] | 1281 | switch (alx_speed_to_ethadv(hw->link_speed, hw->duplex)) { |
| 1282 | case ADVERTISED_1000baseT_Full: |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1283 | return "1 Gbps Full"; |
Johannes Berg | a5b87cc | 2013-06-29 19:23:17 +0200 | [diff] [blame] | 1284 | case ADVERTISED_100baseT_Full: |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1285 | return "100 Mbps Full"; |
Johannes Berg | a5b87cc | 2013-06-29 19:23:17 +0200 | [diff] [blame] | 1286 | case ADVERTISED_100baseT_Half: |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1287 | return "100 Mbps Half"; |
Johannes Berg | a5b87cc | 2013-06-29 19:23:17 +0200 | [diff] [blame] | 1288 | case ADVERTISED_10baseT_Full: |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1289 | return "10 Mbps Full"; |
Johannes Berg | a5b87cc | 2013-06-29 19:23:17 +0200 | [diff] [blame] | 1290 | case ADVERTISED_10baseT_Half: |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1291 | return "10 Mbps Half"; |
| 1292 | default: |
| 1293 | return "Unknown speed"; |
| 1294 | } |
| 1295 | } |
| 1296 | |
| 1297 | static void alx_check_link(struct alx_priv *alx) |
| 1298 | { |
| 1299 | struct alx_hw *hw = &alx->hw; |
| 1300 | unsigned long flags; |
Johannes Berg | a5b87cc | 2013-06-29 19:23:17 +0200 | [diff] [blame] | 1301 | int old_speed; |
| 1302 | u8 old_duplex; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1303 | int err; |
| 1304 | |
| 1305 | /* clear PHY internal interrupt status, otherwise the main |
| 1306 | * interrupt status will be asserted forever |
| 1307 | */ |
| 1308 | alx_clear_phy_intr(hw); |
| 1309 | |
Johannes Berg | a5b87cc | 2013-06-29 19:23:17 +0200 | [diff] [blame] | 1310 | old_speed = hw->link_speed; |
| 1311 | old_duplex = hw->duplex; |
| 1312 | err = alx_read_phy_link(hw); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1313 | if (err < 0) |
| 1314 | goto reset; |
| 1315 | |
| 1316 | spin_lock_irqsave(&alx->irq_lock, flags); |
| 1317 | alx->int_mask |= ALX_ISR_PHY; |
| 1318 | alx_write_mem32(hw, ALX_IMR, alx->int_mask); |
| 1319 | spin_unlock_irqrestore(&alx->irq_lock, flags); |
| 1320 | |
Johannes Berg | a5b87cc | 2013-06-29 19:23:17 +0200 | [diff] [blame] | 1321 | if (old_speed == hw->link_speed) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1322 | return; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1323 | |
Johannes Berg | a5b87cc | 2013-06-29 19:23:17 +0200 | [diff] [blame] | 1324 | if (hw->link_speed != SPEED_UNKNOWN) { |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1325 | netif_info(alx, link, alx->dev, |
Johannes Berg | a5b87cc | 2013-06-29 19:23:17 +0200 | [diff] [blame] | 1326 | "NIC Up: %s\n", alx_speed_desc(hw)); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1327 | alx_post_phy_link(hw); |
| 1328 | alx_enable_aspm(hw, true, true); |
| 1329 | alx_start_mac(hw); |
| 1330 | |
| 1331 | if (old_speed == SPEED_UNKNOWN) |
| 1332 | alx_netif_start(alx); |
| 1333 | } else { |
| 1334 | /* link is now down */ |
| 1335 | alx_netif_stop(alx); |
| 1336 | netif_info(alx, link, alx->dev, "Link Down\n"); |
| 1337 | err = alx_reset_mac(hw); |
| 1338 | if (err) |
| 1339 | goto reset; |
| 1340 | alx_irq_disable(alx); |
| 1341 | |
| 1342 | /* MAC reset causes all HW settings to be lost, restore all */ |
| 1343 | err = alx_reinit_rings(alx); |
| 1344 | if (err) |
| 1345 | goto reset; |
| 1346 | alx_configure(alx); |
| 1347 | alx_enable_aspm(hw, false, true); |
| 1348 | alx_post_phy_link(hw); |
| 1349 | alx_irq_enable(alx); |
| 1350 | } |
| 1351 | |
| 1352 | return; |
| 1353 | |
| 1354 | reset: |
| 1355 | alx_schedule_reset(alx); |
| 1356 | } |
| 1357 | |
| 1358 | static int alx_open(struct net_device *netdev) |
| 1359 | { |
| 1360 | return __alx_open(netdev_priv(netdev), false); |
| 1361 | } |
| 1362 | |
| 1363 | static int alx_stop(struct net_device *netdev) |
| 1364 | { |
| 1365 | __alx_stop(netdev_priv(netdev)); |
| 1366 | return 0; |
| 1367 | } |
| 1368 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1369 | static void alx_link_check(struct work_struct *work) |
| 1370 | { |
| 1371 | struct alx_priv *alx; |
| 1372 | |
| 1373 | alx = container_of(work, struct alx_priv, link_check_wk); |
| 1374 | |
| 1375 | rtnl_lock(); |
| 1376 | alx_check_link(alx); |
| 1377 | rtnl_unlock(); |
| 1378 | } |
| 1379 | |
| 1380 | static void alx_reset(struct work_struct *work) |
| 1381 | { |
| 1382 | struct alx_priv *alx = container_of(work, struct alx_priv, reset_wk); |
| 1383 | |
| 1384 | rtnl_lock(); |
| 1385 | alx_reinit(alx); |
| 1386 | rtnl_unlock(); |
| 1387 | } |
| 1388 | |
Tobias Regnery | ab72598 | 2016-08-25 20:09:53 +0200 | [diff] [blame] | 1389 | static int alx_tpd_req(struct sk_buff *skb) |
| 1390 | { |
| 1391 | int num; |
| 1392 | |
| 1393 | num = skb_shinfo(skb)->nr_frags + 1; |
| 1394 | /* we need one extra descriptor for LSOv2 */ |
| 1395 | if (skb_is_gso(skb) && skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) |
| 1396 | num++; |
| 1397 | |
| 1398 | return num; |
| 1399 | } |
| 1400 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1401 | static int alx_tx_csum(struct sk_buff *skb, struct alx_txd *first) |
| 1402 | { |
| 1403 | u8 cso, css; |
| 1404 | |
| 1405 | if (skb->ip_summed != CHECKSUM_PARTIAL) |
| 1406 | return 0; |
| 1407 | |
| 1408 | cso = skb_checksum_start_offset(skb); |
| 1409 | if (cso & 1) |
| 1410 | return -EINVAL; |
| 1411 | |
| 1412 | css = cso + skb->csum_offset; |
| 1413 | first->word1 |= cpu_to_le32((cso >> 1) << TPD_CXSUMSTART_SHIFT); |
| 1414 | first->word1 |= cpu_to_le32((css >> 1) << TPD_CXSUMOFFSET_SHIFT); |
| 1415 | first->word1 |= cpu_to_le32(1 << TPD_CXSUM_EN_SHIFT); |
| 1416 | |
| 1417 | return 0; |
| 1418 | } |
| 1419 | |
Tobias Regnery | ab72598 | 2016-08-25 20:09:53 +0200 | [diff] [blame] | 1420 | static int alx_tso(struct sk_buff *skb, struct alx_txd *first) |
| 1421 | { |
| 1422 | int err; |
| 1423 | |
| 1424 | if (skb->ip_summed != CHECKSUM_PARTIAL) |
| 1425 | return 0; |
| 1426 | |
| 1427 | if (!skb_is_gso(skb)) |
| 1428 | return 0; |
| 1429 | |
| 1430 | err = skb_cow_head(skb, 0); |
| 1431 | if (err < 0) |
| 1432 | return err; |
| 1433 | |
| 1434 | if (skb->protocol == htons(ETH_P_IP)) { |
| 1435 | struct iphdr *iph = ip_hdr(skb); |
| 1436 | |
| 1437 | iph->check = 0; |
| 1438 | tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, |
| 1439 | 0, IPPROTO_TCP, 0); |
| 1440 | first->word1 |= 1 << TPD_IPV4_SHIFT; |
| 1441 | } else if (skb_is_gso_v6(skb)) { |
| 1442 | ipv6_hdr(skb)->payload_len = 0; |
| 1443 | tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
| 1444 | &ipv6_hdr(skb)->daddr, |
| 1445 | 0, IPPROTO_TCP, 0); |
| 1446 | /* LSOv2: the first TPD only provides the packet length */ |
| 1447 | first->adrl.l.pkt_len = skb->len; |
| 1448 | first->word1 |= 1 << TPD_LSO_V2_SHIFT; |
| 1449 | } |
| 1450 | |
| 1451 | first->word1 |= 1 << TPD_LSO_EN_SHIFT; |
| 1452 | first->word1 |= (skb_transport_offset(skb) & |
| 1453 | TPD_L4HDROFFSET_MASK) << TPD_L4HDROFFSET_SHIFT; |
| 1454 | first->word1 |= (skb_shinfo(skb)->gso_size & |
| 1455 | TPD_MSS_MASK) << TPD_MSS_SHIFT; |
| 1456 | return 1; |
| 1457 | } |
| 1458 | |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 1459 | static int alx_map_tx_skb(struct alx_tx_queue *txq, struct sk_buff *skb) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1460 | { |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1461 | struct alx_txd *tpd, *first_tpd; |
| 1462 | dma_addr_t dma; |
| 1463 | int maplen, f, first_idx = txq->write_idx; |
| 1464 | |
| 1465 | first_tpd = &txq->tpd[txq->write_idx]; |
| 1466 | tpd = first_tpd; |
| 1467 | |
Tobias Regnery | ab72598 | 2016-08-25 20:09:53 +0200 | [diff] [blame] | 1468 | if (tpd->word1 & (1 << TPD_LSO_V2_SHIFT)) { |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 1469 | if (++txq->write_idx == txq->count) |
Tobias Regnery | ab72598 | 2016-08-25 20:09:53 +0200 | [diff] [blame] | 1470 | txq->write_idx = 0; |
| 1471 | |
| 1472 | tpd = &txq->tpd[txq->write_idx]; |
| 1473 | tpd->len = first_tpd->len; |
| 1474 | tpd->vlan_tag = first_tpd->vlan_tag; |
| 1475 | tpd->word1 = first_tpd->word1; |
| 1476 | } |
| 1477 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1478 | maplen = skb_headlen(skb); |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 1479 | dma = dma_map_single(txq->dev, skb->data, maplen, |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1480 | DMA_TO_DEVICE); |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 1481 | if (dma_mapping_error(txq->dev, dma)) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1482 | goto err_dma; |
| 1483 | |
| 1484 | dma_unmap_len_set(&txq->bufs[txq->write_idx], size, maplen); |
| 1485 | dma_unmap_addr_set(&txq->bufs[txq->write_idx], dma, dma); |
| 1486 | |
| 1487 | tpd->adrl.addr = cpu_to_le64(dma); |
| 1488 | tpd->len = cpu_to_le16(maplen); |
| 1489 | |
| 1490 | for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) { |
| 1491 | struct skb_frag_struct *frag; |
| 1492 | |
| 1493 | frag = &skb_shinfo(skb)->frags[f]; |
| 1494 | |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 1495 | if (++txq->write_idx == txq->count) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1496 | txq->write_idx = 0; |
| 1497 | tpd = &txq->tpd[txq->write_idx]; |
| 1498 | |
| 1499 | tpd->word1 = first_tpd->word1; |
| 1500 | |
| 1501 | maplen = skb_frag_size(frag); |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 1502 | dma = skb_frag_dma_map(txq->dev, frag, 0, |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1503 | maplen, DMA_TO_DEVICE); |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 1504 | if (dma_mapping_error(txq->dev, dma)) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1505 | goto err_dma; |
| 1506 | dma_unmap_len_set(&txq->bufs[txq->write_idx], size, maplen); |
| 1507 | dma_unmap_addr_set(&txq->bufs[txq->write_idx], dma, dma); |
| 1508 | |
| 1509 | tpd->adrl.addr = cpu_to_le64(dma); |
| 1510 | tpd->len = cpu_to_le16(maplen); |
| 1511 | } |
| 1512 | |
| 1513 | /* last TPD, set EOP flag and store skb */ |
| 1514 | tpd->word1 |= cpu_to_le32(1 << TPD_EOP_SHIFT); |
| 1515 | txq->bufs[txq->write_idx].skb = skb; |
| 1516 | |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 1517 | if (++txq->write_idx == txq->count) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1518 | txq->write_idx = 0; |
| 1519 | |
| 1520 | return 0; |
| 1521 | |
| 1522 | err_dma: |
| 1523 | f = first_idx; |
| 1524 | while (f != txq->write_idx) { |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 1525 | alx_free_txbuf(txq, f); |
| 1526 | if (++f == txq->count) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1527 | f = 0; |
| 1528 | } |
| 1529 | return -ENOMEM; |
| 1530 | } |
| 1531 | |
Tobias Regnery | 2e06826 | 2016-11-15 12:43:14 +0100 | [diff] [blame] | 1532 | static netdev_tx_t alx_start_xmit_ring(struct sk_buff *skb, |
| 1533 | struct alx_tx_queue *txq) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1534 | { |
Tobias Regnery | 2e06826 | 2016-11-15 12:43:14 +0100 | [diff] [blame] | 1535 | struct alx_priv *alx; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1536 | struct alx_txd *first; |
Tobias Regnery | ab72598 | 2016-08-25 20:09:53 +0200 | [diff] [blame] | 1537 | int tso; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1538 | |
Tobias Regnery | 2e06826 | 2016-11-15 12:43:14 +0100 | [diff] [blame] | 1539 | alx = netdev_priv(txq->netdev); |
| 1540 | |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 1541 | if (alx_tpd_avail(txq) < alx_tpd_req(skb)) { |
Tobias Regnery | 2e06826 | 2016-11-15 12:43:14 +0100 | [diff] [blame] | 1542 | netif_tx_stop_queue(alx_get_tx_queue(txq)); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1543 | goto drop; |
| 1544 | } |
| 1545 | |
| 1546 | first = &txq->tpd[txq->write_idx]; |
| 1547 | memset(first, 0, sizeof(*first)); |
| 1548 | |
Tobias Regnery | ab72598 | 2016-08-25 20:09:53 +0200 | [diff] [blame] | 1549 | tso = alx_tso(skb, first); |
| 1550 | if (tso < 0) |
| 1551 | goto drop; |
| 1552 | else if (!tso && alx_tx_csum(skb, first)) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1553 | goto drop; |
| 1554 | |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 1555 | if (alx_map_tx_skb(txq, skb) < 0) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1556 | goto drop; |
| 1557 | |
Tobias Regnery | 2e06826 | 2016-11-15 12:43:14 +0100 | [diff] [blame] | 1558 | netdev_tx_sent_queue(alx_get_tx_queue(txq), skb->len); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1559 | |
| 1560 | /* flush updates before updating hardware */ |
| 1561 | wmb(); |
Tobias Regnery | 2e06826 | 2016-11-15 12:43:14 +0100 | [diff] [blame] | 1562 | alx_write_mem16(&alx->hw, txq->p_reg, txq->write_idx); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1563 | |
Tobias Regnery | 702e841 | 2016-11-15 12:43:11 +0100 | [diff] [blame] | 1564 | if (alx_tpd_avail(txq) < txq->count / 8) |
Tobias Regnery | 2e06826 | 2016-11-15 12:43:14 +0100 | [diff] [blame] | 1565 | netif_tx_stop_queue(alx_get_tx_queue(txq)); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1566 | |
| 1567 | return NETDEV_TX_OK; |
| 1568 | |
| 1569 | drop: |
Eric W. Biederman | 548ff1e | 2014-03-15 15:53:09 -0700 | [diff] [blame] | 1570 | dev_kfree_skb_any(skb); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1571 | return NETDEV_TX_OK; |
| 1572 | } |
| 1573 | |
Tobias Regnery | 2e06826 | 2016-11-15 12:43:14 +0100 | [diff] [blame] | 1574 | static netdev_tx_t alx_start_xmit(struct sk_buff *skb, |
| 1575 | struct net_device *netdev) |
| 1576 | { |
| 1577 | struct alx_priv *alx = netdev_priv(netdev); |
| 1578 | return alx_start_xmit_ring(skb, alx_tx_queue_mapping(alx, skb)); |
| 1579 | } |
| 1580 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1581 | static void alx_tx_timeout(struct net_device *dev) |
| 1582 | { |
| 1583 | struct alx_priv *alx = netdev_priv(dev); |
| 1584 | |
| 1585 | alx_schedule_reset(alx); |
| 1586 | } |
| 1587 | |
| 1588 | static int alx_mdio_read(struct net_device *netdev, |
| 1589 | int prtad, int devad, u16 addr) |
| 1590 | { |
| 1591 | struct alx_priv *alx = netdev_priv(netdev); |
| 1592 | struct alx_hw *hw = &alx->hw; |
| 1593 | u16 val; |
| 1594 | int err; |
| 1595 | |
| 1596 | if (prtad != hw->mdio.prtad) |
| 1597 | return -EINVAL; |
| 1598 | |
| 1599 | if (devad == MDIO_DEVAD_NONE) |
| 1600 | err = alx_read_phy_reg(hw, addr, &val); |
| 1601 | else |
| 1602 | err = alx_read_phy_ext(hw, devad, addr, &val); |
| 1603 | |
| 1604 | if (err) |
| 1605 | return err; |
| 1606 | return val; |
| 1607 | } |
| 1608 | |
| 1609 | static int alx_mdio_write(struct net_device *netdev, |
| 1610 | int prtad, int devad, u16 addr, u16 val) |
| 1611 | { |
| 1612 | struct alx_priv *alx = netdev_priv(netdev); |
| 1613 | struct alx_hw *hw = &alx->hw; |
| 1614 | |
| 1615 | if (prtad != hw->mdio.prtad) |
| 1616 | return -EINVAL; |
| 1617 | |
| 1618 | if (devad == MDIO_DEVAD_NONE) |
| 1619 | return alx_write_phy_reg(hw, addr, val); |
| 1620 | |
| 1621 | return alx_write_phy_ext(hw, devad, addr, val); |
| 1622 | } |
| 1623 | |
| 1624 | static int alx_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) |
| 1625 | { |
| 1626 | struct alx_priv *alx = netdev_priv(netdev); |
| 1627 | |
| 1628 | if (!netif_running(netdev)) |
| 1629 | return -EAGAIN; |
| 1630 | |
| 1631 | return mdio_mii_ioctl(&alx->hw.mdio, if_mii(ifr), cmd); |
| 1632 | } |
| 1633 | |
| 1634 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 1635 | static void alx_poll_controller(struct net_device *netdev) |
| 1636 | { |
| 1637 | struct alx_priv *alx = netdev_priv(netdev); |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 1638 | int i; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1639 | |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 1640 | if (alx->flags & ALX_FLAG_USING_MSIX) { |
| 1641 | alx_intr_msix_misc(0, alx); |
Tobias Regnery | e0eac25 | 2016-11-15 12:43:12 +0100 | [diff] [blame] | 1642 | for (i = 0; i < alx->num_txq; i++) |
| 1643 | alx_intr_msix_ring(0, alx->qnapi[i]); |
Tobias Regnery | dc39a78 | 2016-09-09 12:19:54 +0200 | [diff] [blame] | 1644 | } else if (alx->flags & ALX_FLAG_USING_MSI) |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1645 | alx_intr_msi(0, alx); |
| 1646 | else |
| 1647 | alx_intr_legacy(0, alx); |
| 1648 | } |
| 1649 | #endif |
| 1650 | |
Sabrina Dubroca | f1b6b10 | 2014-01-09 10:09:30 +0100 | [diff] [blame] | 1651 | static struct rtnl_link_stats64 *alx_get_stats64(struct net_device *dev, |
| 1652 | struct rtnl_link_stats64 *net_stats) |
| 1653 | { |
| 1654 | struct alx_priv *alx = netdev_priv(dev); |
| 1655 | struct alx_hw_stats *hw_stats = &alx->hw.stats; |
| 1656 | |
| 1657 | spin_lock(&alx->stats_lock); |
| 1658 | |
| 1659 | alx_update_hw_stats(&alx->hw); |
| 1660 | |
| 1661 | net_stats->tx_bytes = hw_stats->tx_byte_cnt; |
| 1662 | net_stats->rx_bytes = hw_stats->rx_byte_cnt; |
| 1663 | net_stats->multicast = hw_stats->rx_mcast; |
| 1664 | net_stats->collisions = hw_stats->tx_single_col + |
| 1665 | hw_stats->tx_multi_col + |
| 1666 | hw_stats->tx_late_col + |
| 1667 | hw_stats->tx_abort_col; |
| 1668 | |
| 1669 | net_stats->rx_errors = hw_stats->rx_frag + |
| 1670 | hw_stats->rx_fcs_err + |
| 1671 | hw_stats->rx_len_err + |
| 1672 | hw_stats->rx_ov_sz + |
| 1673 | hw_stats->rx_ov_rrd + |
| 1674 | hw_stats->rx_align_err + |
| 1675 | hw_stats->rx_ov_rxf; |
| 1676 | |
| 1677 | net_stats->rx_fifo_errors = hw_stats->rx_ov_rxf; |
| 1678 | net_stats->rx_length_errors = hw_stats->rx_len_err; |
| 1679 | net_stats->rx_crc_errors = hw_stats->rx_fcs_err; |
| 1680 | net_stats->rx_frame_errors = hw_stats->rx_align_err; |
| 1681 | net_stats->rx_dropped = hw_stats->rx_ov_rrd; |
| 1682 | |
| 1683 | net_stats->tx_errors = hw_stats->tx_late_col + |
| 1684 | hw_stats->tx_abort_col + |
| 1685 | hw_stats->tx_underrun + |
| 1686 | hw_stats->tx_trunc; |
| 1687 | |
| 1688 | net_stats->tx_aborted_errors = hw_stats->tx_abort_col; |
| 1689 | net_stats->tx_fifo_errors = hw_stats->tx_underrun; |
| 1690 | net_stats->tx_window_errors = hw_stats->tx_late_col; |
| 1691 | |
| 1692 | net_stats->tx_packets = hw_stats->tx_ok + net_stats->tx_errors; |
| 1693 | net_stats->rx_packets = hw_stats->rx_ok + net_stats->rx_errors; |
| 1694 | |
| 1695 | spin_unlock(&alx->stats_lock); |
| 1696 | |
| 1697 | return net_stats; |
| 1698 | } |
| 1699 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1700 | static const struct net_device_ops alx_netdev_ops = { |
| 1701 | .ndo_open = alx_open, |
| 1702 | .ndo_stop = alx_stop, |
| 1703 | .ndo_start_xmit = alx_start_xmit, |
Sabrina Dubroca | f1b6b10 | 2014-01-09 10:09:30 +0100 | [diff] [blame] | 1704 | .ndo_get_stats64 = alx_get_stats64, |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1705 | .ndo_set_rx_mode = alx_set_rx_mode, |
| 1706 | .ndo_validate_addr = eth_validate_addr, |
| 1707 | .ndo_set_mac_address = alx_set_mac_address, |
| 1708 | .ndo_change_mtu = alx_change_mtu, |
| 1709 | .ndo_do_ioctl = alx_ioctl, |
| 1710 | .ndo_tx_timeout = alx_tx_timeout, |
| 1711 | .ndo_fix_features = alx_fix_features, |
| 1712 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 1713 | .ndo_poll_controller = alx_poll_controller, |
| 1714 | #endif |
| 1715 | }; |
| 1716 | |
| 1717 | static int alx_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
| 1718 | { |
| 1719 | struct net_device *netdev; |
| 1720 | struct alx_priv *alx; |
| 1721 | struct alx_hw *hw; |
| 1722 | bool phy_configured; |
Johannes Thumshirn | caa8e93 | 2016-06-07 09:44:06 +0200 | [diff] [blame] | 1723 | int err; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1724 | |
| 1725 | err = pci_enable_device_mem(pdev); |
| 1726 | if (err) |
| 1727 | return err; |
| 1728 | |
| 1729 | /* The alx chip can DMA to 64-bit addresses, but it uses a single |
| 1730 | * shared register for the high 32 bits, so only a single, aligned, |
| 1731 | * 4 GB physical address range can be used for descriptors. |
| 1732 | */ |
Peter Senna Tschudin | 8d7f1fb | 2014-03-16 00:30:52 +0100 | [diff] [blame] | 1733 | if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) { |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1734 | dev_dbg(&pdev->dev, "DMA to 64-BIT addresses\n"); |
| 1735 | } else { |
Peter Senna Tschudin | 8d7f1fb | 2014-03-16 00:30:52 +0100 | [diff] [blame] | 1736 | err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1737 | if (err) { |
Peter Senna Tschudin | 8d7f1fb | 2014-03-16 00:30:52 +0100 | [diff] [blame] | 1738 | dev_err(&pdev->dev, "No usable DMA config, aborting\n"); |
| 1739 | goto out_pci_disable; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1740 | } |
| 1741 | } |
| 1742 | |
Johannes Thumshirn | caa8e93 | 2016-06-07 09:44:06 +0200 | [diff] [blame] | 1743 | err = pci_request_mem_regions(pdev, alx_drv_name); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1744 | if (err) { |
| 1745 | dev_err(&pdev->dev, |
Johannes Thumshirn | caa8e93 | 2016-06-07 09:44:06 +0200 | [diff] [blame] | 1746 | "pci_request_mem_regions failed\n"); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1747 | goto out_pci_disable; |
| 1748 | } |
| 1749 | |
| 1750 | pci_enable_pcie_error_reporting(pdev); |
| 1751 | pci_set_master(pdev); |
| 1752 | |
Yijing Wang | c3eb7a7 | 2013-09-11 10:07:00 +0800 | [diff] [blame] | 1753 | if (!pdev->pm_cap) { |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1754 | dev_err(&pdev->dev, |
| 1755 | "Can't find power management capability, aborting\n"); |
| 1756 | err = -EIO; |
| 1757 | goto out_pci_release; |
| 1758 | } |
| 1759 | |
Tobias Regnery | d768319 | 2016-11-15 12:43:16 +0100 | [diff] [blame] | 1760 | netdev = alloc_etherdev_mqs(sizeof(*alx), |
| 1761 | ALX_MAX_TX_QUEUES, 1); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1762 | if (!netdev) { |
| 1763 | err = -ENOMEM; |
| 1764 | goto out_pci_release; |
| 1765 | } |
| 1766 | |
| 1767 | SET_NETDEV_DEV(netdev, &pdev->dev); |
| 1768 | alx = netdev_priv(netdev); |
Maarten Lankhorst | a8798a5 | 2013-07-11 15:53:21 +0200 | [diff] [blame] | 1769 | spin_lock_init(&alx->hw.mdio_lock); |
| 1770 | spin_lock_init(&alx->irq_lock); |
John Greene | 3e5ccc2 | 2014-02-10 14:34:04 -0500 | [diff] [blame] | 1771 | spin_lock_init(&alx->stats_lock); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1772 | alx->dev = netdev; |
| 1773 | alx->hw.pdev = pdev; |
| 1774 | alx->msg_enable = NETIF_MSG_LINK | NETIF_MSG_HW | NETIF_MSG_IFUP | |
| 1775 | NETIF_MSG_TX_ERR | NETIF_MSG_RX_ERR | NETIF_MSG_WOL; |
| 1776 | hw = &alx->hw; |
| 1777 | pci_set_drvdata(pdev, alx); |
| 1778 | |
| 1779 | hw->hw_addr = pci_ioremap_bar(pdev, 0); |
| 1780 | if (!hw->hw_addr) { |
| 1781 | dev_err(&pdev->dev, "cannot map device registers\n"); |
| 1782 | err = -EIO; |
| 1783 | goto out_free_netdev; |
| 1784 | } |
| 1785 | |
| 1786 | netdev->netdev_ops = &alx_netdev_ops; |
Wilfried Klaebe | 7ad24ea | 2014-05-11 00:12:32 +0000 | [diff] [blame] | 1787 | netdev->ethtool_ops = &alx_ethtool_ops; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1788 | netdev->irq = pdev->irq; |
| 1789 | netdev->watchdog_timeo = ALX_WATCHDOG_TIME; |
| 1790 | |
| 1791 | if (ent->driver_data & ALX_DEV_QUIRK_MSI_INTX_DISABLE_BUG) |
| 1792 | pdev->dev_flags |= PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG; |
| 1793 | |
| 1794 | err = alx_init_sw(alx); |
| 1795 | if (err) { |
| 1796 | dev_err(&pdev->dev, "net device private data init failed\n"); |
| 1797 | goto out_unmap; |
| 1798 | } |
| 1799 | |
| 1800 | alx_reset_pcie(hw); |
| 1801 | |
| 1802 | phy_configured = alx_phy_configured(hw); |
| 1803 | |
| 1804 | if (!phy_configured) |
| 1805 | alx_reset_phy(hw); |
| 1806 | |
| 1807 | err = alx_reset_mac(hw); |
| 1808 | if (err) { |
| 1809 | dev_err(&pdev->dev, "MAC Reset failed, error = %d\n", err); |
| 1810 | goto out_unmap; |
| 1811 | } |
| 1812 | |
| 1813 | /* setup link to put it in a known good starting state */ |
| 1814 | if (!phy_configured) { |
| 1815 | err = alx_setup_speed_duplex(hw, hw->adv_cfg, hw->flowctrl); |
| 1816 | if (err) { |
| 1817 | dev_err(&pdev->dev, |
| 1818 | "failed to configure PHY speed/duplex (err=%d)\n", |
| 1819 | err); |
| 1820 | goto out_unmap; |
| 1821 | } |
| 1822 | } |
| 1823 | |
Tobias Regnery | ab72598 | 2016-08-25 20:09:53 +0200 | [diff] [blame] | 1824 | netdev->hw_features = NETIF_F_SG | |
| 1825 | NETIF_F_HW_CSUM | |
| 1826 | NETIF_F_TSO | |
| 1827 | NETIF_F_TSO6; |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1828 | |
| 1829 | if (alx_get_perm_macaddr(hw, hw->perm_addr)) { |
| 1830 | dev_warn(&pdev->dev, |
| 1831 | "Invalid permanent address programmed, using random one\n"); |
| 1832 | eth_hw_addr_random(netdev); |
| 1833 | memcpy(hw->perm_addr, netdev->dev_addr, netdev->addr_len); |
| 1834 | } |
| 1835 | |
| 1836 | memcpy(hw->mac_addr, hw->perm_addr, ETH_ALEN); |
| 1837 | memcpy(netdev->dev_addr, hw->mac_addr, ETH_ALEN); |
| 1838 | memcpy(netdev->perm_addr, hw->perm_addr, ETH_ALEN); |
| 1839 | |
| 1840 | hw->mdio.prtad = 0; |
| 1841 | hw->mdio.mmds = 0; |
| 1842 | hw->mdio.dev = netdev; |
| 1843 | hw->mdio.mode_support = MDIO_SUPPORTS_C45 | |
| 1844 | MDIO_SUPPORTS_C22 | |
| 1845 | MDIO_EMULATE_C22; |
| 1846 | hw->mdio.mdio_read = alx_mdio_read; |
| 1847 | hw->mdio.mdio_write = alx_mdio_write; |
| 1848 | |
| 1849 | if (!alx_get_phy_info(hw)) { |
| 1850 | dev_err(&pdev->dev, "failed to identify PHY\n"); |
| 1851 | err = -EIO; |
| 1852 | goto out_unmap; |
| 1853 | } |
| 1854 | |
| 1855 | INIT_WORK(&alx->link_check_wk, alx_link_check); |
| 1856 | INIT_WORK(&alx->reset_wk, alx_reset); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1857 | netif_carrier_off(netdev); |
| 1858 | |
| 1859 | err = register_netdev(netdev); |
| 1860 | if (err) { |
| 1861 | dev_err(&pdev->dev, "register netdevice failed\n"); |
| 1862 | goto out_unmap; |
| 1863 | } |
| 1864 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1865 | netdev_info(netdev, |
| 1866 | "Qualcomm Atheros AR816x/AR817x Ethernet [%pM]\n", |
| 1867 | netdev->dev_addr); |
| 1868 | |
| 1869 | return 0; |
| 1870 | |
| 1871 | out_unmap: |
| 1872 | iounmap(hw->hw_addr); |
| 1873 | out_free_netdev: |
| 1874 | free_netdev(netdev); |
| 1875 | out_pci_release: |
Johannes Thumshirn | caa8e93 | 2016-06-07 09:44:06 +0200 | [diff] [blame] | 1876 | pci_release_mem_regions(pdev); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1877 | out_pci_disable: |
| 1878 | pci_disable_device(pdev); |
| 1879 | return err; |
| 1880 | } |
| 1881 | |
| 1882 | static void alx_remove(struct pci_dev *pdev) |
| 1883 | { |
| 1884 | struct alx_priv *alx = pci_get_drvdata(pdev); |
| 1885 | struct alx_hw *hw = &alx->hw; |
| 1886 | |
| 1887 | cancel_work_sync(&alx->link_check_wk); |
| 1888 | cancel_work_sync(&alx->reset_wk); |
| 1889 | |
| 1890 | /* restore permanent mac address */ |
| 1891 | alx_set_macaddr(hw, hw->perm_addr); |
| 1892 | |
| 1893 | unregister_netdev(alx->dev); |
| 1894 | iounmap(hw->hw_addr); |
Johannes Thumshirn | caa8e93 | 2016-06-07 09:44:06 +0200 | [diff] [blame] | 1895 | pci_release_mem_regions(pdev); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1896 | |
| 1897 | pci_disable_pcie_error_reporting(pdev); |
| 1898 | pci_disable_device(pdev); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1899 | |
| 1900 | free_netdev(alx->dev); |
| 1901 | } |
| 1902 | |
| 1903 | #ifdef CONFIG_PM_SLEEP |
| 1904 | static int alx_suspend(struct device *dev) |
| 1905 | { |
| 1906 | struct pci_dev *pdev = to_pci_dev(dev); |
Johannes Berg | bc2bebe | 2013-07-03 21:48:11 +0200 | [diff] [blame] | 1907 | struct alx_priv *alx = pci_get_drvdata(pdev); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1908 | |
Johannes Berg | bc2bebe | 2013-07-03 21:48:11 +0200 | [diff] [blame] | 1909 | if (!netif_running(alx->dev)) |
| 1910 | return 0; |
| 1911 | netif_device_detach(alx->dev); |
| 1912 | __alx_stop(alx); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1913 | return 0; |
| 1914 | } |
| 1915 | |
| 1916 | static int alx_resume(struct device *dev) |
| 1917 | { |
| 1918 | struct pci_dev *pdev = to_pci_dev(dev); |
| 1919 | struct alx_priv *alx = pci_get_drvdata(pdev); |
hahnjo | b54629e | 2013-11-12 18:19:24 +0100 | [diff] [blame] | 1920 | struct alx_hw *hw = &alx->hw; |
| 1921 | |
| 1922 | alx_reset_phy(hw); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1923 | |
Johannes Berg | bc2bebe | 2013-07-03 21:48:11 +0200 | [diff] [blame] | 1924 | if (!netif_running(alx->dev)) |
| 1925 | return 0; |
| 1926 | netif_device_attach(alx->dev); |
| 1927 | return __alx_open(alx, true); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1928 | } |
Johannes Berg | bc2bebe | 2013-07-03 21:48:11 +0200 | [diff] [blame] | 1929 | |
| 1930 | static SIMPLE_DEV_PM_OPS(alx_pm_ops, alx_suspend, alx_resume); |
| 1931 | #define ALX_PM_OPS (&alx_pm_ops) |
| 1932 | #else |
| 1933 | #define ALX_PM_OPS NULL |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1934 | #endif |
| 1935 | |
Johannes Berg | bc2bebe | 2013-07-03 21:48:11 +0200 | [diff] [blame] | 1936 | |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1937 | static pci_ers_result_t alx_pci_error_detected(struct pci_dev *pdev, |
| 1938 | pci_channel_state_t state) |
| 1939 | { |
| 1940 | struct alx_priv *alx = pci_get_drvdata(pdev); |
| 1941 | struct net_device *netdev = alx->dev; |
| 1942 | pci_ers_result_t rc = PCI_ERS_RESULT_NEED_RESET; |
| 1943 | |
| 1944 | dev_info(&pdev->dev, "pci error detected\n"); |
| 1945 | |
| 1946 | rtnl_lock(); |
| 1947 | |
| 1948 | if (netif_running(netdev)) { |
| 1949 | netif_device_detach(netdev); |
| 1950 | alx_halt(alx); |
| 1951 | } |
| 1952 | |
| 1953 | if (state == pci_channel_io_perm_failure) |
| 1954 | rc = PCI_ERS_RESULT_DISCONNECT; |
| 1955 | else |
| 1956 | pci_disable_device(pdev); |
| 1957 | |
| 1958 | rtnl_unlock(); |
| 1959 | |
| 1960 | return rc; |
| 1961 | } |
| 1962 | |
| 1963 | static pci_ers_result_t alx_pci_error_slot_reset(struct pci_dev *pdev) |
| 1964 | { |
| 1965 | struct alx_priv *alx = pci_get_drvdata(pdev); |
| 1966 | struct alx_hw *hw = &alx->hw; |
| 1967 | pci_ers_result_t rc = PCI_ERS_RESULT_DISCONNECT; |
| 1968 | |
| 1969 | dev_info(&pdev->dev, "pci error slot reset\n"); |
| 1970 | |
| 1971 | rtnl_lock(); |
| 1972 | |
| 1973 | if (pci_enable_device(pdev)) { |
| 1974 | dev_err(&pdev->dev, "Failed to re-enable PCI device after reset\n"); |
| 1975 | goto out; |
| 1976 | } |
| 1977 | |
| 1978 | pci_set_master(pdev); |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 1979 | |
| 1980 | alx_reset_pcie(hw); |
| 1981 | if (!alx_reset_mac(hw)) |
| 1982 | rc = PCI_ERS_RESULT_RECOVERED; |
| 1983 | out: |
| 1984 | pci_cleanup_aer_uncorrect_error_status(pdev); |
| 1985 | |
| 1986 | rtnl_unlock(); |
| 1987 | |
| 1988 | return rc; |
| 1989 | } |
| 1990 | |
| 1991 | static void alx_pci_error_resume(struct pci_dev *pdev) |
| 1992 | { |
| 1993 | struct alx_priv *alx = pci_get_drvdata(pdev); |
| 1994 | struct net_device *netdev = alx->dev; |
| 1995 | |
| 1996 | dev_info(&pdev->dev, "pci error resume\n"); |
| 1997 | |
| 1998 | rtnl_lock(); |
| 1999 | |
| 2000 | if (netif_running(netdev)) { |
| 2001 | alx_activate(alx); |
| 2002 | netif_device_attach(netdev); |
| 2003 | } |
| 2004 | |
| 2005 | rtnl_unlock(); |
| 2006 | } |
| 2007 | |
| 2008 | static const struct pci_error_handlers alx_err_handlers = { |
| 2009 | .error_detected = alx_pci_error_detected, |
| 2010 | .slot_reset = alx_pci_error_slot_reset, |
| 2011 | .resume = alx_pci_error_resume, |
| 2012 | }; |
| 2013 | |
Benoit Taine | 9baa3c3 | 2014-08-08 15:56:03 +0200 | [diff] [blame] | 2014 | static const struct pci_device_id alx_pci_tbl[] = { |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 2015 | { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_AR8161), |
| 2016 | .driver_data = ALX_DEV_QUIRK_MSI_INTX_DISABLE_BUG }, |
| 2017 | { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_E2200), |
| 2018 | .driver_data = ALX_DEV_QUIRK_MSI_INTX_DISABLE_BUG }, |
Ben Pope | 0208e95 | 2015-11-17 18:21:07 -0700 | [diff] [blame] | 2019 | { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_E2400), |
| 2020 | .driver_data = ALX_DEV_QUIRK_MSI_INTX_DISABLE_BUG }, |
Owen Lin | b99b43b | 2016-08-26 13:49:09 +0800 | [diff] [blame] | 2021 | { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_E2500), |
| 2022 | .driver_data = ALX_DEV_QUIRK_MSI_INTX_DISABLE_BUG }, |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 2023 | { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_AR8162), |
| 2024 | .driver_data = ALX_DEV_QUIRK_MSI_INTX_DISABLE_BUG }, |
| 2025 | { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_AR8171) }, |
| 2026 | { PCI_VDEVICE(ATTANSIC, ALX_DEV_ID_AR8172) }, |
| 2027 | {} |
| 2028 | }; |
| 2029 | |
| 2030 | static struct pci_driver alx_driver = { |
| 2031 | .name = alx_drv_name, |
| 2032 | .id_table = alx_pci_tbl, |
| 2033 | .probe = alx_probe, |
| 2034 | .remove = alx_remove, |
Johannes Berg | ab69bde | 2013-06-17 22:44:02 +0200 | [diff] [blame] | 2035 | .err_handler = &alx_err_handlers, |
| 2036 | .driver.pm = ALX_PM_OPS, |
| 2037 | }; |
| 2038 | |
| 2039 | module_pci_driver(alx_driver); |
| 2040 | MODULE_DEVICE_TABLE(pci, alx_pci_tbl); |
| 2041 | MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>"); |
| 2042 | MODULE_AUTHOR("Qualcomm Corporation, <nic-devel@qualcomm.com>"); |
| 2043 | MODULE_DESCRIPTION( |
| 2044 | "Qualcomm Atheros(R) AR816x/AR817x PCI-E Ethernet Network Driver"); |
| 2045 | MODULE_LICENSE("GPL"); |