| /**************************************************************************/ |
| /* */ |
| /* IBM System i and System p Virtual NIC Device Driver */ |
| /* Copyright (C) 2014 IBM Corp. */ |
| /* Santiago Leon (santi_leon@yahoo.com) */ |
| /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ |
| /* John Allen (jallen@linux.vnet.ibm.com) */ |
| /* */ |
| /* This program is free software; you can redistribute it and/or modify */ |
| /* it under the terms of the GNU General Public License as published by */ |
| /* the Free Software Foundation; either version 2 of the License, or */ |
| /* (at your option) any later version. */ |
| /* */ |
| /* This program is distributed in the hope that it will be useful, */ |
| /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ |
| /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ |
| /* GNU General Public License for more details. */ |
| /* */ |
| /* You should have received a copy of the GNU General Public License */ |
| /* along with this program. */ |
| /* */ |
| /* This module contains the implementation of a virtual ethernet device */ |
| /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ |
| /* option of the RS/6000 Platform Architecture to interface with virtual */ |
| /* ethernet NICs that are presented to the partition by the hypervisor. */ |
| /* */ |
| /* Messages are passed between the VNIC driver and the VNIC server using */ |
| /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ |
| /* issue and receive commands that initiate communication with the server */ |
| /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ |
| /* are used by the driver to notify the server that a packet is */ |
| /* ready for transmission or that a buffer has been added to receive a */ |
| /* packet. Subsequently, sCRQs are used by the server to notify the */ |
| /* driver that a packet transmission has been completed or that a packet */ |
| /* has been received and placed in a waiting buffer. */ |
| /* */ |
| /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ |
| /* which skbs are DMA mapped and immediately unmapped when the transmit */ |
| /* or receive has been completed, the VNIC driver is required to use */ |
| /* "long term mapping". This entails that large, continuous DMA mapped */ |
| /* buffers are allocated on driver initialization and these buffers are */ |
| /* then continuously reused to pass skbs to and from the VNIC server. */ |
| /* */ |
| /**************************************************************************/ |
| |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/types.h> |
| #include <linux/errno.h> |
| #include <linux/completion.h> |
| #include <linux/ioport.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/kernel.h> |
| #include <linux/netdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/skbuff.h> |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| #include <linux/mm.h> |
| #include <linux/ethtool.h> |
| #include <linux/proc_fs.h> |
| #include <linux/in.h> |
| #include <linux/ip.h> |
| #include <linux/ipv6.h> |
| #include <linux/irq.h> |
| #include <linux/kthread.h> |
| #include <linux/seq_file.h> |
| #include <linux/debugfs.h> |
| #include <linux/interrupt.h> |
| #include <net/net_namespace.h> |
| #include <asm/hvcall.h> |
| #include <linux/atomic.h> |
| #include <asm/vio.h> |
| #include <asm/iommu.h> |
| #include <linux/uaccess.h> |
| #include <asm/firmware.h> |
| #include <linux/workqueue.h> |
| |
| #include "ibmvnic.h" |
| |
| static const char ibmvnic_driver_name[] = "ibmvnic"; |
| static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; |
| |
| MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>"); |
| MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(IBMVNIC_DRIVER_VERSION); |
| |
| static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; |
| static int ibmvnic_remove(struct vio_dev *); |
| static void release_sub_crqs(struct ibmvnic_adapter *); |
| static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *); |
| static int ibmvnic_reset_crq(struct ibmvnic_adapter *); |
| static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); |
| static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); |
| static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); |
| static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, |
| union sub_crq *sub_crq); |
| static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); |
| static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); |
| static int enable_scrq_irq(struct ibmvnic_adapter *, |
| struct ibmvnic_sub_crq_queue *); |
| static int disable_scrq_irq(struct ibmvnic_adapter *, |
| struct ibmvnic_sub_crq_queue *); |
| static int pending_scrq(struct ibmvnic_adapter *, |
| struct ibmvnic_sub_crq_queue *); |
| static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, |
| struct ibmvnic_sub_crq_queue *); |
| static int ibmvnic_poll(struct napi_struct *napi, int data); |
| static void send_map_query(struct ibmvnic_adapter *adapter); |
| static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); |
| static void send_request_unmap(struct ibmvnic_adapter *, u8); |
| |
| struct ibmvnic_stat { |
| char name[ETH_GSTRING_LEN]; |
| int offset; |
| }; |
| |
| #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ |
| offsetof(struct ibmvnic_statistics, stat)) |
| #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) |
| |
| static const struct ibmvnic_stat ibmvnic_stats[] = { |
| {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, |
| {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, |
| {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, |
| {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, |
| {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, |
| {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, |
| {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, |
| {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, |
| {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, |
| {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, |
| {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, |
| {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, |
| {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, |
| {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, |
| {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, |
| {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, |
| {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, |
| {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, |
| {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, |
| {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, |
| {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, |
| {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, |
| }; |
| |
| static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, |
| unsigned long length, unsigned long *number, |
| unsigned long *irq) |
| { |
| unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; |
| long rc; |
| |
| rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); |
| *number = retbuf[0]; |
| *irq = retbuf[1]; |
| |
| return rc; |
| } |
| |
| /* net_device_ops functions */ |
| |
| static void init_rx_pool(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_rx_pool *rx_pool, int num, int index, |
| int buff_size, int active) |
| { |
| netdev_dbg(adapter->netdev, |
| "Initializing rx_pool %d, %d buffs, %d bytes each\n", |
| index, num, buff_size); |
| rx_pool->size = num; |
| rx_pool->index = index; |
| rx_pool->buff_size = buff_size; |
| rx_pool->active = active; |
| } |
| |
| static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_long_term_buff *ltb, int size) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| |
| ltb->size = size; |
| ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, |
| GFP_KERNEL); |
| |
| if (!ltb->buff) { |
| dev_err(dev, "Couldn't alloc long term buffer\n"); |
| return -ENOMEM; |
| } |
| ltb->map_id = adapter->map_id; |
| adapter->map_id++; |
| send_request_map(adapter, ltb->addr, |
| ltb->size, ltb->map_id); |
| init_completion(&adapter->fw_done); |
| wait_for_completion(&adapter->fw_done); |
| return 0; |
| } |
| |
| static void free_long_term_buff(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_long_term_buff *ltb) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| |
| dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); |
| if (!adapter->failover) |
| send_request_unmap(adapter, ltb->map_id); |
| } |
| |
| static int alloc_rx_pool(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_rx_pool *pool) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| int i; |
| |
| pool->free_map = kcalloc(pool->size, sizeof(int), GFP_KERNEL); |
| if (!pool->free_map) |
| return -ENOMEM; |
| |
| pool->rx_buff = kcalloc(pool->size, sizeof(struct ibmvnic_rx_buff), |
| GFP_KERNEL); |
| |
| if (!pool->rx_buff) { |
| dev_err(dev, "Couldn't alloc rx buffers\n"); |
| kfree(pool->free_map); |
| return -ENOMEM; |
| } |
| |
| if (alloc_long_term_buff(adapter, &pool->long_term_buff, |
| pool->size * pool->buff_size)) { |
| kfree(pool->free_map); |
| kfree(pool->rx_buff); |
| return -ENOMEM; |
| } |
| |
| for (i = 0; i < pool->size; ++i) |
| pool->free_map[i] = i; |
| |
| atomic_set(&pool->available, 0); |
| pool->next_alloc = 0; |
| pool->next_free = 0; |
| |
| return 0; |
| } |
| |
| static void replenish_rx_pool(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_rx_pool *pool) |
| { |
| int count = pool->size - atomic_read(&pool->available); |
| struct device *dev = &adapter->vdev->dev; |
| int buffers_added = 0; |
| unsigned long lpar_rc; |
| union sub_crq sub_crq; |
| struct sk_buff *skb; |
| unsigned int offset; |
| dma_addr_t dma_addr; |
| unsigned char *dst; |
| u64 *handle_array; |
| int shift = 0; |
| int index; |
| int i; |
| |
| handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + |
| be32_to_cpu(adapter->login_rsp_buf-> |
| off_rxadd_subcrqs)); |
| |
| for (i = 0; i < count; ++i) { |
| skb = alloc_skb(pool->buff_size, GFP_ATOMIC); |
| if (!skb) { |
| dev_err(dev, "Couldn't replenish rx buff\n"); |
| adapter->replenish_no_mem++; |
| break; |
| } |
| |
| index = pool->free_map[pool->next_free]; |
| |
| if (pool->rx_buff[index].skb) |
| dev_err(dev, "Inconsistent free_map!\n"); |
| |
| /* Copy the skb to the long term mapped DMA buffer */ |
| offset = index * pool->buff_size; |
| dst = pool->long_term_buff.buff + offset; |
| memset(dst, 0, pool->buff_size); |
| dma_addr = pool->long_term_buff.addr + offset; |
| pool->rx_buff[index].data = dst; |
| |
| pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; |
| pool->rx_buff[index].dma = dma_addr; |
| pool->rx_buff[index].skb = skb; |
| pool->rx_buff[index].pool_index = pool->index; |
| pool->rx_buff[index].size = pool->buff_size; |
| |
| memset(&sub_crq, 0, sizeof(sub_crq)); |
| sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; |
| sub_crq.rx_add.correlator = |
| cpu_to_be64((u64)&pool->rx_buff[index]); |
| sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); |
| sub_crq.rx_add.map_id = pool->long_term_buff.map_id; |
| |
| /* The length field of the sCRQ is defined to be 24 bits so the |
| * buffer size needs to be left shifted by a byte before it is |
| * converted to big endian to prevent the last byte from being |
| * truncated. |
| */ |
| #ifdef __LITTLE_ENDIAN__ |
| shift = 8; |
| #endif |
| sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); |
| |
| lpar_rc = send_subcrq(adapter, handle_array[pool->index], |
| &sub_crq); |
| if (lpar_rc != H_SUCCESS) |
| goto failure; |
| |
| buffers_added++; |
| adapter->replenish_add_buff_success++; |
| pool->next_free = (pool->next_free + 1) % pool->size; |
| } |
| atomic_add(buffers_added, &pool->available); |
| return; |
| |
| failure: |
| dev_info(dev, "replenish pools failure\n"); |
| pool->free_map[pool->next_free] = index; |
| pool->rx_buff[index].skb = NULL; |
| if (!dma_mapping_error(dev, dma_addr)) |
| dma_unmap_single(dev, dma_addr, pool->buff_size, |
| DMA_FROM_DEVICE); |
| |
| dev_kfree_skb_any(skb); |
| adapter->replenish_add_buff_failure++; |
| atomic_add(buffers_added, &pool->available); |
| } |
| |
| static void replenish_pools(struct ibmvnic_adapter *adapter) |
| { |
| int i; |
| |
| if (adapter->migrated) |
| return; |
| |
| adapter->replenish_task_cycles++; |
| for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); |
| i++) { |
| if (adapter->rx_pool[i].active) |
| replenish_rx_pool(adapter, &adapter->rx_pool[i]); |
| } |
| } |
| |
| static void free_rx_pool(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_rx_pool *pool) |
| { |
| int i; |
| |
| kfree(pool->free_map); |
| pool->free_map = NULL; |
| |
| if (!pool->rx_buff) |
| return; |
| |
| for (i = 0; i < pool->size; i++) { |
| if (pool->rx_buff[i].skb) { |
| dev_kfree_skb_any(pool->rx_buff[i].skb); |
| pool->rx_buff[i].skb = NULL; |
| } |
| } |
| kfree(pool->rx_buff); |
| pool->rx_buff = NULL; |
| } |
| |
| static int ibmvnic_open(struct net_device *netdev) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| struct device *dev = &adapter->vdev->dev; |
| struct ibmvnic_tx_pool *tx_pool; |
| union ibmvnic_crq crq; |
| int rxadd_subcrqs; |
| u64 *size_array; |
| int tx_subcrqs; |
| int i, j; |
| |
| rxadd_subcrqs = |
| be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); |
| tx_subcrqs = |
| be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); |
| size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + |
| be32_to_cpu(adapter->login_rsp_buf-> |
| off_rxadd_buff_size)); |
| adapter->map_id = 1; |
| adapter->napi = kcalloc(adapter->req_rx_queues, |
| sizeof(struct napi_struct), GFP_KERNEL); |
| if (!adapter->napi) |
| goto alloc_napi_failed; |
| for (i = 0; i < adapter->req_rx_queues; i++) { |
| netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll, |
| NAPI_POLL_WEIGHT); |
| napi_enable(&adapter->napi[i]); |
| } |
| adapter->rx_pool = |
| kcalloc(rxadd_subcrqs, sizeof(struct ibmvnic_rx_pool), GFP_KERNEL); |
| |
| if (!adapter->rx_pool) |
| goto rx_pool_arr_alloc_failed; |
| send_map_query(adapter); |
| for (i = 0; i < rxadd_subcrqs; i++) { |
| init_rx_pool(adapter, &adapter->rx_pool[i], |
| IBMVNIC_BUFFS_PER_POOL, i, |
| be64_to_cpu(size_array[i]), 1); |
| if (alloc_rx_pool(adapter, &adapter->rx_pool[i])) { |
| dev_err(dev, "Couldn't alloc rx pool\n"); |
| goto rx_pool_alloc_failed; |
| } |
| } |
| adapter->tx_pool = |
| kcalloc(tx_subcrqs, sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); |
| |
| if (!adapter->tx_pool) |
| goto tx_pool_arr_alloc_failed; |
| for (i = 0; i < tx_subcrqs; i++) { |
| tx_pool = &adapter->tx_pool[i]; |
| tx_pool->tx_buff = |
| kcalloc(adapter->max_tx_entries_per_subcrq, |
| sizeof(struct ibmvnic_tx_buff), GFP_KERNEL); |
| if (!tx_pool->tx_buff) |
| goto tx_pool_alloc_failed; |
| |
| if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, |
| adapter->max_tx_entries_per_subcrq * |
| adapter->req_mtu)) |
| goto tx_ltb_alloc_failed; |
| |
| tx_pool->free_map = |
| kcalloc(adapter->max_tx_entries_per_subcrq, |
| sizeof(int), GFP_KERNEL); |
| if (!tx_pool->free_map) |
| goto tx_fm_alloc_failed; |
| |
| for (j = 0; j < adapter->max_tx_entries_per_subcrq; j++) |
| tx_pool->free_map[j] = j; |
| |
| tx_pool->consumer_index = 0; |
| tx_pool->producer_index = 0; |
| } |
| adapter->bounce_buffer_size = |
| (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1; |
| adapter->bounce_buffer = kmalloc(adapter->bounce_buffer_size, |
| GFP_KERNEL); |
| if (!adapter->bounce_buffer) |
| goto bounce_alloc_failed; |
| |
| adapter->bounce_buffer_dma = dma_map_single(dev, adapter->bounce_buffer, |
| adapter->bounce_buffer_size, |
| DMA_TO_DEVICE); |
| if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) { |
| dev_err(dev, "Couldn't map tx bounce buffer\n"); |
| goto bounce_map_failed; |
| } |
| replenish_pools(adapter); |
| |
| /* We're ready to receive frames, enable the sub-crq interrupts and |
| * set the logical link state to up |
| */ |
| for (i = 0; i < adapter->req_rx_queues; i++) |
| enable_scrq_irq(adapter, adapter->rx_scrq[i]); |
| |
| for (i = 0; i < adapter->req_tx_queues; i++) |
| enable_scrq_irq(adapter, adapter->tx_scrq[i]); |
| |
| memset(&crq, 0, sizeof(crq)); |
| crq.logical_link_state.first = IBMVNIC_CRQ_CMD; |
| crq.logical_link_state.cmd = LOGICAL_LINK_STATE; |
| crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_UP; |
| ibmvnic_send_crq(adapter, &crq); |
| |
| netif_tx_start_all_queues(netdev); |
| |
| return 0; |
| |
| bounce_map_failed: |
| kfree(adapter->bounce_buffer); |
| bounce_alloc_failed: |
| i = tx_subcrqs - 1; |
| kfree(adapter->tx_pool[i].free_map); |
| tx_fm_alloc_failed: |
| free_long_term_buff(adapter, &adapter->tx_pool[i].long_term_buff); |
| tx_ltb_alloc_failed: |
| kfree(adapter->tx_pool[i].tx_buff); |
| tx_pool_alloc_failed: |
| for (j = 0; j < i; j++) { |
| kfree(adapter->tx_pool[j].tx_buff); |
| free_long_term_buff(adapter, |
| &adapter->tx_pool[j].long_term_buff); |
| kfree(adapter->tx_pool[j].free_map); |
| } |
| kfree(adapter->tx_pool); |
| adapter->tx_pool = NULL; |
| tx_pool_arr_alloc_failed: |
| i = rxadd_subcrqs; |
| rx_pool_alloc_failed: |
| for (j = 0; j < i; j++) { |
| free_rx_pool(adapter, &adapter->rx_pool[j]); |
| free_long_term_buff(adapter, |
| &adapter->rx_pool[j].long_term_buff); |
| } |
| kfree(adapter->rx_pool); |
| adapter->rx_pool = NULL; |
| rx_pool_arr_alloc_failed: |
| for (i = 0; i < adapter->req_rx_queues; i++) |
| napi_enable(&adapter->napi[i]); |
| alloc_napi_failed: |
| return -ENOMEM; |
| } |
| |
| static int ibmvnic_close(struct net_device *netdev) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| struct device *dev = &adapter->vdev->dev; |
| union ibmvnic_crq crq; |
| int i; |
| |
| adapter->closing = true; |
| |
| for (i = 0; i < adapter->req_rx_queues; i++) |
| napi_disable(&adapter->napi[i]); |
| |
| if (!adapter->failover) |
| netif_tx_stop_all_queues(netdev); |
| |
| if (adapter->bounce_buffer) { |
| if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) { |
| dma_unmap_single(&adapter->vdev->dev, |
| adapter->bounce_buffer_dma, |
| adapter->bounce_buffer_size, |
| DMA_BIDIRECTIONAL); |
| adapter->bounce_buffer_dma = DMA_ERROR_CODE; |
| } |
| kfree(adapter->bounce_buffer); |
| adapter->bounce_buffer = NULL; |
| } |
| |
| memset(&crq, 0, sizeof(crq)); |
| crq.logical_link_state.first = IBMVNIC_CRQ_CMD; |
| crq.logical_link_state.cmd = LOGICAL_LINK_STATE; |
| crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_DN; |
| ibmvnic_send_crq(adapter, &crq); |
| |
| for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); |
| i++) { |
| kfree(adapter->tx_pool[i].tx_buff); |
| free_long_term_buff(adapter, |
| &adapter->tx_pool[i].long_term_buff); |
| kfree(adapter->tx_pool[i].free_map); |
| } |
| kfree(adapter->tx_pool); |
| adapter->tx_pool = NULL; |
| |
| for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); |
| i++) { |
| free_rx_pool(adapter, &adapter->rx_pool[i]); |
| free_long_term_buff(adapter, |
| &adapter->rx_pool[i].long_term_buff); |
| } |
| kfree(adapter->rx_pool); |
| adapter->rx_pool = NULL; |
| |
| adapter->closing = false; |
| |
| return 0; |
| } |
| |
| /** |
| * build_hdr_data - creates L2/L3/L4 header data buffer |
| * @hdr_field - bitfield determining needed headers |
| * @skb - socket buffer |
| * @hdr_len - array of header lengths |
| * @tot_len - total length of data |
| * |
| * Reads hdr_field to determine which headers are needed by firmware. |
| * Builds a buffer containing these headers. Saves individual header |
| * lengths and total buffer length to be used to build descriptors. |
| */ |
| static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, |
| int *hdr_len, u8 *hdr_data) |
| { |
| int len = 0; |
| u8 *hdr; |
| |
| hdr_len[0] = sizeof(struct ethhdr); |
| |
| if (skb->protocol == htons(ETH_P_IP)) { |
| hdr_len[1] = ip_hdr(skb)->ihl * 4; |
| if (ip_hdr(skb)->protocol == IPPROTO_TCP) |
| hdr_len[2] = tcp_hdrlen(skb); |
| else if (ip_hdr(skb)->protocol == IPPROTO_UDP) |
| hdr_len[2] = sizeof(struct udphdr); |
| } else if (skb->protocol == htons(ETH_P_IPV6)) { |
| hdr_len[1] = sizeof(struct ipv6hdr); |
| if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) |
| hdr_len[2] = tcp_hdrlen(skb); |
| else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) |
| hdr_len[2] = sizeof(struct udphdr); |
| } |
| |
| memset(hdr_data, 0, 120); |
| if ((hdr_field >> 6) & 1) { |
| hdr = skb_mac_header(skb); |
| memcpy(hdr_data, hdr, hdr_len[0]); |
| len += hdr_len[0]; |
| } |
| |
| if ((hdr_field >> 5) & 1) { |
| hdr = skb_network_header(skb); |
| memcpy(hdr_data + len, hdr, hdr_len[1]); |
| len += hdr_len[1]; |
| } |
| |
| if ((hdr_field >> 4) & 1) { |
| hdr = skb_transport_header(skb); |
| memcpy(hdr_data + len, hdr, hdr_len[2]); |
| len += hdr_len[2]; |
| } |
| return len; |
| } |
| |
| /** |
| * create_hdr_descs - create header and header extension descriptors |
| * @hdr_field - bitfield determining needed headers |
| * @data - buffer containing header data |
| * @len - length of data buffer |
| * @hdr_len - array of individual header lengths |
| * @scrq_arr - descriptor array |
| * |
| * Creates header and, if needed, header extension descriptors and |
| * places them in a descriptor array, scrq_arr |
| */ |
| |
| static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, |
| union sub_crq *scrq_arr) |
| { |
| union sub_crq hdr_desc; |
| int tmp_len = len; |
| u8 *data, *cur; |
| int tmp; |
| |
| while (tmp_len > 0) { |
| cur = hdr_data + len - tmp_len; |
| |
| memset(&hdr_desc, 0, sizeof(hdr_desc)); |
| if (cur != hdr_data) { |
| data = hdr_desc.hdr_ext.data; |
| tmp = tmp_len > 29 ? 29 : tmp_len; |
| hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; |
| hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; |
| hdr_desc.hdr_ext.len = tmp; |
| } else { |
| data = hdr_desc.hdr.data; |
| tmp = tmp_len > 24 ? 24 : tmp_len; |
| hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; |
| hdr_desc.hdr.type = IBMVNIC_HDR_DESC; |
| hdr_desc.hdr.len = tmp; |
| hdr_desc.hdr.l2_len = (u8)hdr_len[0]; |
| hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); |
| hdr_desc.hdr.l4_len = (u8)hdr_len[2]; |
| hdr_desc.hdr.flag = hdr_field << 1; |
| } |
| memcpy(data, cur, tmp); |
| tmp_len -= tmp; |
| *scrq_arr = hdr_desc; |
| scrq_arr++; |
| } |
| } |
| |
| /** |
| * build_hdr_descs_arr - build a header descriptor array |
| * @skb - socket buffer |
| * @num_entries - number of descriptors to be sent |
| * @subcrq - first TX descriptor |
| * @hdr_field - bit field determining which headers will be sent |
| * |
| * This function will build a TX descriptor array with applicable |
| * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. |
| */ |
| |
| static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, |
| int *num_entries, u8 hdr_field) |
| { |
| int hdr_len[3] = {0, 0, 0}; |
| int tot_len, len; |
| u8 *hdr_data = txbuff->hdr_data; |
| |
| tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, |
| txbuff->hdr_data); |
| len = tot_len; |
| len -= 24; |
| if (len > 0) |
| num_entries += len % 29 ? len / 29 + 1 : len / 29; |
| create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, |
| txbuff->indir_arr + 1); |
| } |
| |
| static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| int queue_num = skb_get_queue_mapping(skb); |
| u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; |
| struct device *dev = &adapter->vdev->dev; |
| struct ibmvnic_tx_buff *tx_buff = NULL; |
| struct ibmvnic_tx_pool *tx_pool; |
| unsigned int tx_send_failed = 0; |
| unsigned int tx_map_failed = 0; |
| unsigned int tx_dropped = 0; |
| unsigned int tx_packets = 0; |
| unsigned int tx_bytes = 0; |
| dma_addr_t data_dma_addr; |
| struct netdev_queue *txq; |
| bool used_bounce = false; |
| unsigned long lpar_rc; |
| union sub_crq tx_crq; |
| unsigned int offset; |
| int num_entries = 1; |
| unsigned char *dst; |
| u64 *handle_array; |
| int index = 0; |
| int ret = 0; |
| |
| tx_pool = &adapter->tx_pool[queue_num]; |
| txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); |
| handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + |
| be32_to_cpu(adapter->login_rsp_buf-> |
| off_txsubm_subcrqs)); |
| if (adapter->migrated) { |
| tx_send_failed++; |
| tx_dropped++; |
| ret = NETDEV_TX_BUSY; |
| goto out; |
| } |
| |
| index = tx_pool->free_map[tx_pool->consumer_index]; |
| offset = index * adapter->req_mtu; |
| dst = tx_pool->long_term_buff.buff + offset; |
| memset(dst, 0, adapter->req_mtu); |
| skb_copy_from_linear_data(skb, dst, skb->len); |
| data_dma_addr = tx_pool->long_term_buff.addr + offset; |
| |
| tx_pool->consumer_index = |
| (tx_pool->consumer_index + 1) % |
| adapter->max_tx_entries_per_subcrq; |
| |
| tx_buff = &tx_pool->tx_buff[index]; |
| tx_buff->skb = skb; |
| tx_buff->data_dma[0] = data_dma_addr; |
| tx_buff->data_len[0] = skb->len; |
| tx_buff->index = index; |
| tx_buff->pool_index = queue_num; |
| tx_buff->last_frag = true; |
| tx_buff->used_bounce = used_bounce; |
| |
| memset(&tx_crq, 0, sizeof(tx_crq)); |
| tx_crq.v1.first = IBMVNIC_CRQ_CMD; |
| tx_crq.v1.type = IBMVNIC_TX_DESC; |
| tx_crq.v1.n_crq_elem = 1; |
| tx_crq.v1.n_sge = 1; |
| tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; |
| tx_crq.v1.correlator = cpu_to_be32(index); |
| tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); |
| tx_crq.v1.sge_len = cpu_to_be32(skb->len); |
| tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); |
| |
| if (adapter->vlan_header_insertion) { |
| tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; |
| tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); |
| } |
| |
| if (skb->protocol == htons(ETH_P_IP)) { |
| if (ip_hdr(skb)->version == 4) |
| tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; |
| else if (ip_hdr(skb)->version == 6) |
| tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; |
| |
| if (ip_hdr(skb)->protocol == IPPROTO_TCP) |
| tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; |
| else if (ip_hdr(skb)->protocol != IPPROTO_TCP) |
| tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; |
| } |
| |
| if (skb->ip_summed == CHECKSUM_PARTIAL) { |
| tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; |
| hdrs += 2; |
| } |
| /* determine if l2/3/4 headers are sent to firmware */ |
| if ((*hdrs >> 7) & 1 && |
| (skb->protocol == htons(ETH_P_IP) || |
| skb->protocol == htons(ETH_P_IPV6))) { |
| build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); |
| tx_crq.v1.n_crq_elem = num_entries; |
| tx_buff->indir_arr[0] = tx_crq; |
| tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, |
| sizeof(tx_buff->indir_arr), |
| DMA_TO_DEVICE); |
| if (dma_mapping_error(dev, tx_buff->indir_dma)) { |
| if (!firmware_has_feature(FW_FEATURE_CMO)) |
| dev_err(dev, "tx: unable to map descriptor array\n"); |
| tx_map_failed++; |
| tx_dropped++; |
| ret = NETDEV_TX_BUSY; |
| goto out; |
| } |
| lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], |
| (u64)tx_buff->indir_dma, |
| (u64)num_entries); |
| } else { |
| lpar_rc = send_subcrq(adapter, handle_array[queue_num], |
| &tx_crq); |
| } |
| if (lpar_rc != H_SUCCESS) { |
| dev_err(dev, "tx failed with code %ld\n", lpar_rc); |
| |
| if (tx_pool->consumer_index == 0) |
| tx_pool->consumer_index = |
| adapter->max_tx_entries_per_subcrq - 1; |
| else |
| tx_pool->consumer_index--; |
| |
| tx_send_failed++; |
| tx_dropped++; |
| ret = NETDEV_TX_BUSY; |
| goto out; |
| } |
| tx_packets++; |
| tx_bytes += skb->len; |
| txq->trans_start = jiffies; |
| ret = NETDEV_TX_OK; |
| |
| out: |
| netdev->stats.tx_dropped += tx_dropped; |
| netdev->stats.tx_bytes += tx_bytes; |
| netdev->stats.tx_packets += tx_packets; |
| adapter->tx_send_failed += tx_send_failed; |
| adapter->tx_map_failed += tx_map_failed; |
| |
| return ret; |
| } |
| |
| static void ibmvnic_set_multi(struct net_device *netdev) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| struct netdev_hw_addr *ha; |
| union ibmvnic_crq crq; |
| |
| memset(&crq, 0, sizeof(crq)); |
| crq.request_capability.first = IBMVNIC_CRQ_CMD; |
| crq.request_capability.cmd = REQUEST_CAPABILITY; |
| |
| if (netdev->flags & IFF_PROMISC) { |
| if (!adapter->promisc_supported) |
| return; |
| } else { |
| if (netdev->flags & IFF_ALLMULTI) { |
| /* Accept all multicast */ |
| memset(&crq, 0, sizeof(crq)); |
| crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; |
| crq.multicast_ctrl.cmd = MULTICAST_CTRL; |
| crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; |
| ibmvnic_send_crq(adapter, &crq); |
| } else if (netdev_mc_empty(netdev)) { |
| /* Reject all multicast */ |
| memset(&crq, 0, sizeof(crq)); |
| crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; |
| crq.multicast_ctrl.cmd = MULTICAST_CTRL; |
| crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; |
| ibmvnic_send_crq(adapter, &crq); |
| } else { |
| /* Accept one or more multicast(s) */ |
| netdev_for_each_mc_addr(ha, netdev) { |
| memset(&crq, 0, sizeof(crq)); |
| crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; |
| crq.multicast_ctrl.cmd = MULTICAST_CTRL; |
| crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; |
| ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], |
| ha->addr); |
| ibmvnic_send_crq(adapter, &crq); |
| } |
| } |
| } |
| } |
| |
| static int ibmvnic_set_mac(struct net_device *netdev, void *p) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| struct sockaddr *addr = p; |
| union ibmvnic_crq crq; |
| |
| if (!is_valid_ether_addr(addr->sa_data)) |
| return -EADDRNOTAVAIL; |
| |
| memset(&crq, 0, sizeof(crq)); |
| crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; |
| crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; |
| ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data); |
| ibmvnic_send_crq(adapter, &crq); |
| /* netdev->dev_addr is changed in handle_change_mac_rsp function */ |
| return 0; |
| } |
| |
| static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| |
| if (new_mtu > adapter->req_mtu || new_mtu < adapter->min_mtu) |
| return -EINVAL; |
| |
| netdev->mtu = new_mtu; |
| return 0; |
| } |
| |
| static void ibmvnic_tx_timeout(struct net_device *dev) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(dev); |
| int rc; |
| |
| /* Adapter timed out, resetting it */ |
| release_sub_crqs(adapter); |
| rc = ibmvnic_reset_crq(adapter); |
| if (rc) |
| dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n"); |
| else |
| ibmvnic_send_crq_init(adapter); |
| } |
| |
| static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_rx_buff *rx_buff) |
| { |
| struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; |
| |
| rx_buff->skb = NULL; |
| |
| pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); |
| pool->next_alloc = (pool->next_alloc + 1) % pool->size; |
| |
| atomic_dec(&pool->available); |
| } |
| |
| static int ibmvnic_poll(struct napi_struct *napi, int budget) |
| { |
| struct net_device *netdev = napi->dev; |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| int scrq_num = (int)(napi - adapter->napi); |
| int frames_processed = 0; |
| restart_poll: |
| while (frames_processed < budget) { |
| struct sk_buff *skb; |
| struct ibmvnic_rx_buff *rx_buff; |
| union sub_crq *next; |
| u32 length; |
| u16 offset; |
| u8 flags = 0; |
| |
| if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) |
| break; |
| next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); |
| rx_buff = |
| (struct ibmvnic_rx_buff *)be64_to_cpu(next-> |
| rx_comp.correlator); |
| /* do error checking */ |
| if (next->rx_comp.rc) { |
| netdev_err(netdev, "rx error %x\n", next->rx_comp.rc); |
| /* free the entry */ |
| next->rx_comp.first = 0; |
| remove_buff_from_pool(adapter, rx_buff); |
| break; |
| } |
| |
| length = be32_to_cpu(next->rx_comp.len); |
| offset = be16_to_cpu(next->rx_comp.off_frame_data); |
| flags = next->rx_comp.flags; |
| skb = rx_buff->skb; |
| skb_copy_to_linear_data(skb, rx_buff->data + offset, |
| length); |
| skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci); |
| /* free the entry */ |
| next->rx_comp.first = 0; |
| remove_buff_from_pool(adapter, rx_buff); |
| |
| skb_put(skb, length); |
| skb->protocol = eth_type_trans(skb, netdev); |
| |
| if (flags & IBMVNIC_IP_CHKSUM_GOOD && |
| flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { |
| skb->ip_summed = CHECKSUM_UNNECESSARY; |
| } |
| |
| length = skb->len; |
| napi_gro_receive(napi, skb); /* send it up */ |
| netdev->stats.rx_packets++; |
| netdev->stats.rx_bytes += length; |
| frames_processed++; |
| } |
| replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); |
| |
| if (frames_processed < budget) { |
| enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); |
| napi_complete(napi); |
| if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && |
| napi_reschedule(napi)) { |
| disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); |
| goto restart_poll; |
| } |
| } |
| return frames_processed; |
| } |
| |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| static void ibmvnic_netpoll_controller(struct net_device *dev) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(dev); |
| int i; |
| |
| replenish_pools(netdev_priv(dev)); |
| for (i = 0; i < adapter->req_rx_queues; i++) |
| ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, |
| adapter->rx_scrq[i]); |
| } |
| #endif |
| |
| static const struct net_device_ops ibmvnic_netdev_ops = { |
| .ndo_open = ibmvnic_open, |
| .ndo_stop = ibmvnic_close, |
| .ndo_start_xmit = ibmvnic_xmit, |
| .ndo_set_rx_mode = ibmvnic_set_multi, |
| .ndo_set_mac_address = ibmvnic_set_mac, |
| .ndo_validate_addr = eth_validate_addr, |
| .ndo_change_mtu = ibmvnic_change_mtu, |
| .ndo_tx_timeout = ibmvnic_tx_timeout, |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| .ndo_poll_controller = ibmvnic_netpoll_controller, |
| #endif |
| }; |
| |
| /* ethtool functions */ |
| |
| static int ibmvnic_get_settings(struct net_device *netdev, |
| struct ethtool_cmd *cmd) |
| { |
| cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | |
| SUPPORTED_FIBRE); |
| cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | |
| ADVERTISED_FIBRE); |
| ethtool_cmd_speed_set(cmd, SPEED_1000); |
| cmd->duplex = DUPLEX_FULL; |
| cmd->port = PORT_FIBRE; |
| cmd->phy_address = 0; |
| cmd->transceiver = XCVR_INTERNAL; |
| cmd->autoneg = AUTONEG_ENABLE; |
| cmd->maxtxpkt = 0; |
| cmd->maxrxpkt = 1; |
| return 0; |
| } |
| |
| static void ibmvnic_get_drvinfo(struct net_device *dev, |
| struct ethtool_drvinfo *info) |
| { |
| strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); |
| strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); |
| } |
| |
| static u32 ibmvnic_get_msglevel(struct net_device *netdev) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| |
| return adapter->msg_enable; |
| } |
| |
| static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| |
| adapter->msg_enable = data; |
| } |
| |
| static u32 ibmvnic_get_link(struct net_device *netdev) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| |
| /* Don't need to send a query because we request a logical link up at |
| * init and then we wait for link state indications |
| */ |
| return adapter->logical_link_state; |
| } |
| |
| static void ibmvnic_get_ringparam(struct net_device *netdev, |
| struct ethtool_ringparam *ring) |
| { |
| ring->rx_max_pending = 0; |
| ring->tx_max_pending = 0; |
| ring->rx_mini_max_pending = 0; |
| ring->rx_jumbo_max_pending = 0; |
| ring->rx_pending = 0; |
| ring->tx_pending = 0; |
| ring->rx_mini_pending = 0; |
| ring->rx_jumbo_pending = 0; |
| } |
| |
| static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) |
| { |
| int i; |
| |
| if (stringset != ETH_SS_STATS) |
| return; |
| |
| for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) |
| memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); |
| } |
| |
| static int ibmvnic_get_sset_count(struct net_device *dev, int sset) |
| { |
| switch (sset) { |
| case ETH_SS_STATS: |
| return ARRAY_SIZE(ibmvnic_stats); |
| default: |
| return -EOPNOTSUPP; |
| } |
| } |
| |
| static void ibmvnic_get_ethtool_stats(struct net_device *dev, |
| struct ethtool_stats *stats, u64 *data) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(dev); |
| union ibmvnic_crq crq; |
| int i; |
| |
| memset(&crq, 0, sizeof(crq)); |
| crq.request_statistics.first = IBMVNIC_CRQ_CMD; |
| crq.request_statistics.cmd = REQUEST_STATISTICS; |
| crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); |
| crq.request_statistics.len = |
| cpu_to_be32(sizeof(struct ibmvnic_statistics)); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| /* Wait for data to be written */ |
| init_completion(&adapter->stats_done); |
| wait_for_completion(&adapter->stats_done); |
| |
| for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) |
| data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset); |
| } |
| |
| static const struct ethtool_ops ibmvnic_ethtool_ops = { |
| .get_settings = ibmvnic_get_settings, |
| .get_drvinfo = ibmvnic_get_drvinfo, |
| .get_msglevel = ibmvnic_get_msglevel, |
| .set_msglevel = ibmvnic_set_msglevel, |
| .get_link = ibmvnic_get_link, |
| .get_ringparam = ibmvnic_get_ringparam, |
| .get_strings = ibmvnic_get_strings, |
| .get_sset_count = ibmvnic_get_sset_count, |
| .get_ethtool_stats = ibmvnic_get_ethtool_stats, |
| }; |
| |
| /* Routines for managing CRQs/sCRQs */ |
| |
| static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_sub_crq_queue *scrq) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| long rc; |
| |
| netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); |
| |
| /* Close the sub-crqs */ |
| do { |
| rc = plpar_hcall_norets(H_FREE_SUB_CRQ, |
| adapter->vdev->unit_address, |
| scrq->crq_num); |
| } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| |
| dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, |
| DMA_BIDIRECTIONAL); |
| free_pages((unsigned long)scrq->msgs, 2); |
| kfree(scrq); |
| } |
| |
| static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter |
| *adapter) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| struct ibmvnic_sub_crq_queue *scrq; |
| int rc; |
| |
| scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC); |
| if (!scrq) |
| return NULL; |
| |
| scrq->msgs = (union sub_crq *)__get_free_pages(GFP_ATOMIC, 2); |
| memset(scrq->msgs, 0, 4 * PAGE_SIZE); |
| if (!scrq->msgs) { |
| dev_warn(dev, "Couldn't allocate crq queue messages page\n"); |
| goto zero_page_failed; |
| } |
| |
| scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, |
| DMA_BIDIRECTIONAL); |
| if (dma_mapping_error(dev, scrq->msg_token)) { |
| dev_warn(dev, "Couldn't map crq queue messages page\n"); |
| goto map_failed; |
| } |
| |
| rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, |
| 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); |
| |
| if (rc == H_RESOURCE) |
| rc = ibmvnic_reset_crq(adapter); |
| |
| if (rc == H_CLOSED) { |
| dev_warn(dev, "Partner adapter not ready, waiting.\n"); |
| } else if (rc) { |
| dev_warn(dev, "Error %d registering sub-crq\n", rc); |
| goto reg_failed; |
| } |
| |
| scrq->adapter = adapter; |
| scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); |
| scrq->cur = 0; |
| scrq->rx_skb_top = NULL; |
| spin_lock_init(&scrq->lock); |
| |
| netdev_dbg(adapter->netdev, |
| "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", |
| scrq->crq_num, scrq->hw_irq, scrq->irq); |
| |
| return scrq; |
| |
| reg_failed: |
| dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, |
| DMA_BIDIRECTIONAL); |
| map_failed: |
| free_pages((unsigned long)scrq->msgs, 2); |
| zero_page_failed: |
| kfree(scrq); |
| |
| return NULL; |
| } |
| |
| static void release_sub_crqs(struct ibmvnic_adapter *adapter) |
| { |
| int i; |
| |
| if (adapter->tx_scrq) { |
| for (i = 0; i < adapter->req_tx_queues; i++) |
| if (adapter->tx_scrq[i]) { |
| free_irq(adapter->tx_scrq[i]->irq, |
| adapter->tx_scrq[i]); |
| irq_dispose_mapping(adapter->tx_scrq[i]->irq); |
| release_sub_crq_queue(adapter, |
| adapter->tx_scrq[i]); |
| } |
| adapter->tx_scrq = NULL; |
| } |
| |
| if (adapter->rx_scrq) { |
| for (i = 0; i < adapter->req_rx_queues; i++) |
| if (adapter->rx_scrq[i]) { |
| free_irq(adapter->rx_scrq[i]->irq, |
| adapter->rx_scrq[i]); |
| irq_dispose_mapping(adapter->rx_scrq[i]->irq); |
| release_sub_crq_queue(adapter, |
| adapter->rx_scrq[i]); |
| } |
| adapter->rx_scrq = NULL; |
| } |
| |
| adapter->requested_caps = 0; |
| } |
| |
| static void release_sub_crqs_no_irqs(struct ibmvnic_adapter *adapter) |
| { |
| int i; |
| |
| if (adapter->tx_scrq) { |
| for (i = 0; i < adapter->req_tx_queues; i++) |
| if (adapter->tx_scrq[i]) |
| release_sub_crq_queue(adapter, |
| adapter->tx_scrq[i]); |
| adapter->tx_scrq = NULL; |
| } |
| |
| if (adapter->rx_scrq) { |
| for (i = 0; i < adapter->req_rx_queues; i++) |
| if (adapter->rx_scrq[i]) |
| release_sub_crq_queue(adapter, |
| adapter->rx_scrq[i]); |
| adapter->rx_scrq = NULL; |
| } |
| |
| adapter->requested_caps = 0; |
| } |
| |
| static int disable_scrq_irq(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_sub_crq_queue *scrq) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| unsigned long rc; |
| |
| rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, |
| H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); |
| if (rc) |
| dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", |
| scrq->hw_irq, rc); |
| return rc; |
| } |
| |
| static int enable_scrq_irq(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_sub_crq_queue *scrq) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| unsigned long rc; |
| |
| if (scrq->hw_irq > 0x100000000ULL) { |
| dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); |
| return 1; |
| } |
| |
| rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, |
| H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); |
| if (rc) |
| dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", |
| scrq->hw_irq, rc); |
| return rc; |
| } |
| |
| static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_sub_crq_queue *scrq) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| struct ibmvnic_tx_buff *txbuff; |
| union sub_crq *next; |
| int index; |
| int i, j; |
| u8 first; |
| |
| restart_loop: |
| while (pending_scrq(adapter, scrq)) { |
| unsigned int pool = scrq->pool_index; |
| |
| next = ibmvnic_next_scrq(adapter, scrq); |
| for (i = 0; i < next->tx_comp.num_comps; i++) { |
| if (next->tx_comp.rcs[i]) { |
| dev_err(dev, "tx error %x\n", |
| next->tx_comp.rcs[i]); |
| continue; |
| } |
| index = be32_to_cpu(next->tx_comp.correlators[i]); |
| txbuff = &adapter->tx_pool[pool].tx_buff[index]; |
| |
| for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { |
| if (!txbuff->data_dma[j]) |
| continue; |
| |
| txbuff->data_dma[j] = 0; |
| txbuff->used_bounce = false; |
| } |
| /* if sub_crq was sent indirectly */ |
| first = txbuff->indir_arr[0].generic.first; |
| if (first == IBMVNIC_CRQ_CMD) { |
| dma_unmap_single(dev, txbuff->indir_dma, |
| sizeof(txbuff->indir_arr), |
| DMA_TO_DEVICE); |
| } |
| |
| if (txbuff->last_frag) |
| dev_kfree_skb_any(txbuff->skb); |
| |
| adapter->tx_pool[pool].free_map[adapter->tx_pool[pool]. |
| producer_index] = index; |
| adapter->tx_pool[pool].producer_index = |
| (adapter->tx_pool[pool].producer_index + 1) % |
| adapter->max_tx_entries_per_subcrq; |
| } |
| /* remove tx_comp scrq*/ |
| next->tx_comp.first = 0; |
| } |
| |
| enable_scrq_irq(adapter, scrq); |
| |
| if (pending_scrq(adapter, scrq)) { |
| disable_scrq_irq(adapter, scrq); |
| goto restart_loop; |
| } |
| |
| return 0; |
| } |
| |
| static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) |
| { |
| struct ibmvnic_sub_crq_queue *scrq = instance; |
| struct ibmvnic_adapter *adapter = scrq->adapter; |
| |
| disable_scrq_irq(adapter, scrq); |
| ibmvnic_complete_tx(adapter, scrq); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) |
| { |
| struct ibmvnic_sub_crq_queue *scrq = instance; |
| struct ibmvnic_adapter *adapter = scrq->adapter; |
| |
| if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { |
| disable_scrq_irq(adapter, scrq); |
| __napi_schedule(&adapter->napi[scrq->scrq_num]); |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| struct ibmvnic_sub_crq_queue *scrq; |
| int i = 0, j = 0; |
| int rc = 0; |
| |
| for (i = 0; i < adapter->req_tx_queues; i++) { |
| scrq = adapter->tx_scrq[i]; |
| scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); |
| |
| if (!scrq->irq) { |
| rc = -EINVAL; |
| dev_err(dev, "Error mapping irq\n"); |
| goto req_tx_irq_failed; |
| } |
| |
| rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, |
| 0, "ibmvnic_tx", scrq); |
| |
| if (rc) { |
| dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", |
| scrq->irq, rc); |
| irq_dispose_mapping(scrq->irq); |
| goto req_rx_irq_failed; |
| } |
| } |
| |
| for (i = 0; i < adapter->req_rx_queues; i++) { |
| scrq = adapter->rx_scrq[i]; |
| scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); |
| if (!scrq->irq) { |
| rc = -EINVAL; |
| dev_err(dev, "Error mapping irq\n"); |
| goto req_rx_irq_failed; |
| } |
| rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, |
| 0, "ibmvnic_rx", scrq); |
| if (rc) { |
| dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", |
| scrq->irq, rc); |
| irq_dispose_mapping(scrq->irq); |
| goto req_rx_irq_failed; |
| } |
| } |
| return rc; |
| |
| req_rx_irq_failed: |
| for (j = 0; j < i; j++) { |
| free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); |
| irq_dispose_mapping(adapter->rx_scrq[j]->irq); |
| } |
| i = adapter->req_tx_queues; |
| req_tx_irq_failed: |
| for (j = 0; j < i; j++) { |
| free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); |
| irq_dispose_mapping(adapter->rx_scrq[j]->irq); |
| } |
| release_sub_crqs_no_irqs(adapter); |
| return rc; |
| } |
| |
| static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| struct ibmvnic_sub_crq_queue **allqueues; |
| int registered_queues = 0; |
| union ibmvnic_crq crq; |
| int total_queues; |
| int more = 0; |
| int i; |
| |
| if (!retry) { |
| /* Sub-CRQ entries are 32 byte long */ |
| int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); |
| |
| if (adapter->min_tx_entries_per_subcrq > entries_page || |
| adapter->min_rx_add_entries_per_subcrq > entries_page) { |
| dev_err(dev, "Fatal, invalid entries per sub-crq\n"); |
| goto allqueues_failed; |
| } |
| |
| /* Get the minimum between the queried max and the entries |
| * that fit in our PAGE_SIZE |
| */ |
| adapter->req_tx_entries_per_subcrq = |
| adapter->max_tx_entries_per_subcrq > entries_page ? |
| entries_page : adapter->max_tx_entries_per_subcrq; |
| adapter->req_rx_add_entries_per_subcrq = |
| adapter->max_rx_add_entries_per_subcrq > entries_page ? |
| entries_page : adapter->max_rx_add_entries_per_subcrq; |
| |
| adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues; |
| adapter->req_rx_queues = adapter->opt_rx_comp_queues; |
| adapter->req_rx_add_queues = adapter->max_rx_add_queues; |
| |
| adapter->req_mtu = adapter->max_mtu; |
| } |
| |
| total_queues = adapter->req_tx_queues + adapter->req_rx_queues; |
| |
| allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC); |
| if (!allqueues) |
| goto allqueues_failed; |
| |
| for (i = 0; i < total_queues; i++) { |
| allqueues[i] = init_sub_crq_queue(adapter); |
| if (!allqueues[i]) { |
| dev_warn(dev, "Couldn't allocate all sub-crqs\n"); |
| break; |
| } |
| registered_queues++; |
| } |
| |
| /* Make sure we were able to register the minimum number of queues */ |
| if (registered_queues < |
| adapter->min_tx_queues + adapter->min_rx_queues) { |
| dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); |
| goto tx_failed; |
| } |
| |
| /* Distribute the failed allocated queues*/ |
| for (i = 0; i < total_queues - registered_queues + more ; i++) { |
| netdev_dbg(adapter->netdev, "Reducing number of queues\n"); |
| switch (i % 3) { |
| case 0: |
| if (adapter->req_rx_queues > adapter->min_rx_queues) |
| adapter->req_rx_queues--; |
| else |
| more++; |
| break; |
| case 1: |
| if (adapter->req_tx_queues > adapter->min_tx_queues) |
| adapter->req_tx_queues--; |
| else |
| more++; |
| break; |
| } |
| } |
| |
| adapter->tx_scrq = kcalloc(adapter->req_tx_queues, |
| sizeof(*adapter->tx_scrq), GFP_ATOMIC); |
| if (!adapter->tx_scrq) |
| goto tx_failed; |
| |
| for (i = 0; i < adapter->req_tx_queues; i++) { |
| adapter->tx_scrq[i] = allqueues[i]; |
| adapter->tx_scrq[i]->pool_index = i; |
| } |
| |
| adapter->rx_scrq = kcalloc(adapter->req_rx_queues, |
| sizeof(*adapter->rx_scrq), GFP_ATOMIC); |
| if (!adapter->rx_scrq) |
| goto rx_failed; |
| |
| for (i = 0; i < adapter->req_rx_queues; i++) { |
| adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; |
| adapter->rx_scrq[i]->scrq_num = i; |
| } |
| |
| memset(&crq, 0, sizeof(crq)); |
| crq.request_capability.first = IBMVNIC_CRQ_CMD; |
| crq.request_capability.cmd = REQUEST_CAPABILITY; |
| |
| crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); |
| crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); |
| crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); |
| crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.request_capability.capability = |
| cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); |
| crq.request_capability.number = |
| cpu_to_be64(adapter->req_tx_entries_per_subcrq); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.request_capability.capability = |
| cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); |
| crq.request_capability.number = |
| cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.request_capability.capability = cpu_to_be16(REQ_MTU); |
| crq.request_capability.number = cpu_to_be64(adapter->req_mtu); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| if (adapter->netdev->flags & IFF_PROMISC) { |
| if (adapter->promisc_supported) { |
| crq.request_capability.capability = |
| cpu_to_be16(PROMISC_REQUESTED); |
| crq.request_capability.number = cpu_to_be64(1); |
| ibmvnic_send_crq(adapter, &crq); |
| } |
| } else { |
| crq.request_capability.capability = |
| cpu_to_be16(PROMISC_REQUESTED); |
| crq.request_capability.number = cpu_to_be64(0); |
| ibmvnic_send_crq(adapter, &crq); |
| } |
| |
| kfree(allqueues); |
| |
| return; |
| |
| rx_failed: |
| kfree(adapter->tx_scrq); |
| adapter->tx_scrq = NULL; |
| tx_failed: |
| for (i = 0; i < registered_queues; i++) |
| release_sub_crq_queue(adapter, allqueues[i]); |
| kfree(allqueues); |
| allqueues_failed: |
| ibmvnic_remove(adapter->vdev); |
| } |
| |
| static int pending_scrq(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_sub_crq_queue *scrq) |
| { |
| union sub_crq *entry = &scrq->msgs[scrq->cur]; |
| |
| if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing) |
| return 1; |
| else |
| return 0; |
| } |
| |
| static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_sub_crq_queue *scrq) |
| { |
| union sub_crq *entry; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&scrq->lock, flags); |
| entry = &scrq->msgs[scrq->cur]; |
| if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { |
| if (++scrq->cur == scrq->size) |
| scrq->cur = 0; |
| } else { |
| entry = NULL; |
| } |
| spin_unlock_irqrestore(&scrq->lock, flags); |
| |
| return entry; |
| } |
| |
| static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) |
| { |
| struct ibmvnic_crq_queue *queue = &adapter->crq; |
| union ibmvnic_crq *crq; |
| |
| crq = &queue->msgs[queue->cur]; |
| if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { |
| if (++queue->cur == queue->size) |
| queue->cur = 0; |
| } else { |
| crq = NULL; |
| } |
| |
| return crq; |
| } |
| |
| static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, |
| union sub_crq *sub_crq) |
| { |
| unsigned int ua = adapter->vdev->unit_address; |
| struct device *dev = &adapter->vdev->dev; |
| u64 *u64_crq = (u64 *)sub_crq; |
| int rc; |
| |
| netdev_dbg(adapter->netdev, |
| "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", |
| (unsigned long int)cpu_to_be64(remote_handle), |
| (unsigned long int)cpu_to_be64(u64_crq[0]), |
| (unsigned long int)cpu_to_be64(u64_crq[1]), |
| (unsigned long int)cpu_to_be64(u64_crq[2]), |
| (unsigned long int)cpu_to_be64(u64_crq[3])); |
| |
| /* Make sure the hypervisor sees the complete request */ |
| mb(); |
| |
| rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, |
| cpu_to_be64(remote_handle), |
| cpu_to_be64(u64_crq[0]), |
| cpu_to_be64(u64_crq[1]), |
| cpu_to_be64(u64_crq[2]), |
| cpu_to_be64(u64_crq[3])); |
| |
| if (rc) { |
| if (rc == H_CLOSED) |
| dev_warn(dev, "CRQ Queue closed\n"); |
| dev_err(dev, "Send error (rc=%d)\n", rc); |
| } |
| |
| return rc; |
| } |
| |
| static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, |
| u64 remote_handle, u64 ioba, u64 num_entries) |
| { |
| unsigned int ua = adapter->vdev->unit_address; |
| struct device *dev = &adapter->vdev->dev; |
| int rc; |
| |
| /* Make sure the hypervisor sees the complete request */ |
| mb(); |
| rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, |
| cpu_to_be64(remote_handle), |
| ioba, num_entries); |
| |
| if (rc) { |
| if (rc == H_CLOSED) |
| dev_warn(dev, "CRQ Queue closed\n"); |
| dev_err(dev, "Send (indirect) error (rc=%d)\n", rc); |
| } |
| |
| return rc; |
| } |
| |
| static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, |
| union ibmvnic_crq *crq) |
| { |
| unsigned int ua = adapter->vdev->unit_address; |
| struct device *dev = &adapter->vdev->dev; |
| u64 *u64_crq = (u64 *)crq; |
| int rc; |
| |
| netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", |
| (unsigned long int)cpu_to_be64(u64_crq[0]), |
| (unsigned long int)cpu_to_be64(u64_crq[1])); |
| |
| /* Make sure the hypervisor sees the complete request */ |
| mb(); |
| |
| rc = plpar_hcall_norets(H_SEND_CRQ, ua, |
| cpu_to_be64(u64_crq[0]), |
| cpu_to_be64(u64_crq[1])); |
| |
| if (rc) { |
| if (rc == H_CLOSED) |
| dev_warn(dev, "CRQ Queue closed\n"); |
| dev_warn(dev, "Send error (rc=%d)\n", rc); |
| } |
| |
| return rc; |
| } |
| |
| static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) |
| { |
| union ibmvnic_crq crq; |
| |
| memset(&crq, 0, sizeof(crq)); |
| crq.generic.first = IBMVNIC_CRQ_INIT_CMD; |
| crq.generic.cmd = IBMVNIC_CRQ_INIT; |
| netdev_dbg(adapter->netdev, "Sending CRQ init\n"); |
| |
| return ibmvnic_send_crq(adapter, &crq); |
| } |
| |
| static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter) |
| { |
| union ibmvnic_crq crq; |
| |
| memset(&crq, 0, sizeof(crq)); |
| crq.generic.first = IBMVNIC_CRQ_INIT_CMD; |
| crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE; |
| netdev_dbg(adapter->netdev, "Sending CRQ init complete\n"); |
| |
| return ibmvnic_send_crq(adapter, &crq); |
| } |
| |
| static int send_version_xchg(struct ibmvnic_adapter *adapter) |
| { |
| union ibmvnic_crq crq; |
| |
| memset(&crq, 0, sizeof(crq)); |
| crq.version_exchange.first = IBMVNIC_CRQ_CMD; |
| crq.version_exchange.cmd = VERSION_EXCHANGE; |
| crq.version_exchange.version = cpu_to_be16(ibmvnic_version); |
| |
| return ibmvnic_send_crq(adapter, &crq); |
| } |
| |
| static void send_login(struct ibmvnic_adapter *adapter) |
| { |
| struct ibmvnic_login_rsp_buffer *login_rsp_buffer; |
| struct ibmvnic_login_buffer *login_buffer; |
| struct ibmvnic_inflight_cmd *inflight_cmd; |
| struct device *dev = &adapter->vdev->dev; |
| dma_addr_t rsp_buffer_token; |
| dma_addr_t buffer_token; |
| size_t rsp_buffer_size; |
| union ibmvnic_crq crq; |
| unsigned long flags; |
| size_t buffer_size; |
| __be64 *tx_list_p; |
| __be64 *rx_list_p; |
| int i; |
| |
| buffer_size = |
| sizeof(struct ibmvnic_login_buffer) + |
| sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues); |
| |
| login_buffer = kmalloc(buffer_size, GFP_ATOMIC); |
| if (!login_buffer) |
| goto buf_alloc_failed; |
| |
| buffer_token = dma_map_single(dev, login_buffer, buffer_size, |
| DMA_TO_DEVICE); |
| if (dma_mapping_error(dev, buffer_token)) { |
| dev_err(dev, "Couldn't map login buffer\n"); |
| goto buf_map_failed; |
| } |
| |
| rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + |
| sizeof(u64) * adapter->req_tx_queues + |
| sizeof(u64) * adapter->req_rx_queues + |
| sizeof(u64) * adapter->req_rx_queues + |
| sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; |
| |
| login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); |
| if (!login_rsp_buffer) |
| goto buf_rsp_alloc_failed; |
| |
| rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, |
| rsp_buffer_size, DMA_FROM_DEVICE); |
| if (dma_mapping_error(dev, rsp_buffer_token)) { |
| dev_err(dev, "Couldn't map login rsp buffer\n"); |
| goto buf_rsp_map_failed; |
| } |
| inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC); |
| if (!inflight_cmd) { |
| dev_err(dev, "Couldn't allocate inflight_cmd\n"); |
| goto inflight_alloc_failed; |
| } |
| adapter->login_buf = login_buffer; |
| adapter->login_buf_token = buffer_token; |
| adapter->login_buf_sz = buffer_size; |
| adapter->login_rsp_buf = login_rsp_buffer; |
| adapter->login_rsp_buf_token = rsp_buffer_token; |
| adapter->login_rsp_buf_sz = rsp_buffer_size; |
| |
| login_buffer->len = cpu_to_be32(buffer_size); |
| login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); |
| login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); |
| login_buffer->off_txcomp_subcrqs = |
| cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); |
| login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); |
| login_buffer->off_rxcomp_subcrqs = |
| cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + |
| sizeof(u64) * adapter->req_tx_queues); |
| login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); |
| login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); |
| |
| tx_list_p = (__be64 *)((char *)login_buffer + |
| sizeof(struct ibmvnic_login_buffer)); |
| rx_list_p = (__be64 *)((char *)login_buffer + |
| sizeof(struct ibmvnic_login_buffer) + |
| sizeof(u64) * adapter->req_tx_queues); |
| |
| for (i = 0; i < adapter->req_tx_queues; i++) { |
| if (adapter->tx_scrq[i]) { |
| tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> |
| crq_num); |
| } |
| } |
| |
| for (i = 0; i < adapter->req_rx_queues; i++) { |
| if (adapter->rx_scrq[i]) { |
| rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> |
| crq_num); |
| } |
| } |
| |
| netdev_dbg(adapter->netdev, "Login Buffer:\n"); |
| for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { |
| netdev_dbg(adapter->netdev, "%016lx\n", |
| ((unsigned long int *)(adapter->login_buf))[i]); |
| } |
| |
| memset(&crq, 0, sizeof(crq)); |
| crq.login.first = IBMVNIC_CRQ_CMD; |
| crq.login.cmd = LOGIN; |
| crq.login.ioba = cpu_to_be32(buffer_token); |
| crq.login.len = cpu_to_be32(buffer_size); |
| |
| memcpy(&inflight_cmd->crq, &crq, sizeof(crq)); |
| |
| spin_lock_irqsave(&adapter->inflight_lock, flags); |
| list_add_tail(&inflight_cmd->list, &adapter->inflight); |
| spin_unlock_irqrestore(&adapter->inflight_lock, flags); |
| |
| ibmvnic_send_crq(adapter, &crq); |
| |
| return; |
| |
| inflight_alloc_failed: |
| dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size, |
| DMA_FROM_DEVICE); |
| buf_rsp_map_failed: |
| kfree(login_rsp_buffer); |
| buf_rsp_alloc_failed: |
| dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); |
| buf_map_failed: |
| kfree(login_buffer); |
| buf_alloc_failed: |
| return; |
| } |
| |
| static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, |
| u32 len, u8 map_id) |
| { |
| union ibmvnic_crq crq; |
| |
| memset(&crq, 0, sizeof(crq)); |
| crq.request_map.first = IBMVNIC_CRQ_CMD; |
| crq.request_map.cmd = REQUEST_MAP; |
| crq.request_map.map_id = map_id; |
| crq.request_map.ioba = cpu_to_be32(addr); |
| crq.request_map.len = cpu_to_be32(len); |
| ibmvnic_send_crq(adapter, &crq); |
| } |
| |
| static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) |
| { |
| union ibmvnic_crq crq; |
| |
| memset(&crq, 0, sizeof(crq)); |
| crq.request_unmap.first = IBMVNIC_CRQ_CMD; |
| crq.request_unmap.cmd = REQUEST_UNMAP; |
| crq.request_unmap.map_id = map_id; |
| ibmvnic_send_crq(adapter, &crq); |
| } |
| |
| static void send_map_query(struct ibmvnic_adapter *adapter) |
| { |
| union ibmvnic_crq crq; |
| |
| memset(&crq, 0, sizeof(crq)); |
| crq.query_map.first = IBMVNIC_CRQ_CMD; |
| crq.query_map.cmd = QUERY_MAP; |
| ibmvnic_send_crq(adapter, &crq); |
| } |
| |
| /* Send a series of CRQs requesting various capabilities of the VNIC server */ |
| static void send_cap_queries(struct ibmvnic_adapter *adapter) |
| { |
| union ibmvnic_crq crq; |
| |
| atomic_set(&adapter->running_cap_queries, 0); |
| memset(&crq, 0, sizeof(crq)); |
| crq.query_capability.first = IBMVNIC_CRQ_CMD; |
| crq.query_capability.cmd = QUERY_CAPABILITY; |
| |
| crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = |
| cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = |
| cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = |
| cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = |
| cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(MIN_MTU); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(MAX_MTU); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = |
| cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = |
| cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = |
| cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); |
| atomic_inc(&adapter->running_cap_queries); |
| ibmvnic_send_crq(adapter, &crq); |
| } |
| |
| static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; |
| union ibmvnic_crq crq; |
| int i; |
| |
| dma_unmap_single(dev, adapter->ip_offload_tok, |
| sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); |
| |
| netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); |
| for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) |
| netdev_dbg(adapter->netdev, "%016lx\n", |
| ((unsigned long int *)(buf))[i]); |
| |
| netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); |
| netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); |
| netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", |
| buf->tcp_ipv4_chksum); |
| netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", |
| buf->tcp_ipv6_chksum); |
| netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", |
| buf->udp_ipv4_chksum); |
| netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", |
| buf->udp_ipv6_chksum); |
| netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", |
| buf->large_tx_ipv4); |
| netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", |
| buf->large_tx_ipv6); |
| netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", |
| buf->large_rx_ipv4); |
| netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", |
| buf->large_rx_ipv6); |
| netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", |
| buf->max_ipv4_header_size); |
| netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", |
| buf->max_ipv6_header_size); |
| netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", |
| buf->max_tcp_header_size); |
| netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", |
| buf->max_udp_header_size); |
| netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", |
| buf->max_large_tx_size); |
| netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", |
| buf->max_large_rx_size); |
| netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", |
| buf->ipv6_extension_header); |
| netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", |
| buf->tcp_pseudosum_req); |
| netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", |
| buf->num_ipv6_ext_headers); |
| netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", |
| buf->off_ipv6_ext_headers); |
| |
| adapter->ip_offload_ctrl_tok = |
| dma_map_single(dev, &adapter->ip_offload_ctrl, |
| sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); |
| |
| if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { |
| dev_err(dev, "Couldn't map ip offload control buffer\n"); |
| return; |
| } |
| |
| adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); |
| adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; |
| adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; |
| adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; |
| adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; |
| |
| /* large_tx/rx disabled for now, additional features needed */ |
| adapter->ip_offload_ctrl.large_tx_ipv4 = 0; |
| adapter->ip_offload_ctrl.large_tx_ipv6 = 0; |
| adapter->ip_offload_ctrl.large_rx_ipv4 = 0; |
| adapter->ip_offload_ctrl.large_rx_ipv6 = 0; |
| |
| adapter->netdev->features = NETIF_F_GSO; |
| |
| if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) |
| adapter->netdev->features |= NETIF_F_IP_CSUM; |
| |
| if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) |
| adapter->netdev->features |= NETIF_F_IPV6_CSUM; |
| |
| if ((adapter->netdev->features & |
| (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) |
| adapter->netdev->features |= NETIF_F_RXCSUM; |
| |
| memset(&crq, 0, sizeof(crq)); |
| crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; |
| crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; |
| crq.control_ip_offload.len = |
| cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); |
| crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); |
| ibmvnic_send_crq(adapter, &crq); |
| } |
| |
| static void handle_error_info_rsp(union ibmvnic_crq *crq, |
| struct ibmvnic_adapter *adapter) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| struct ibmvnic_error_buff *error_buff, *tmp; |
| unsigned long flags; |
| bool found = false; |
| int i; |
| |
| if (!crq->request_error_rsp.rc.code) { |
| dev_info(dev, "Request Error Rsp returned with rc=%x\n", |
| crq->request_error_rsp.rc.code); |
| return; |
| } |
| |
| spin_lock_irqsave(&adapter->error_list_lock, flags); |
| list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) |
| if (error_buff->error_id == crq->request_error_rsp.error_id) { |
| found = true; |
| list_del(&error_buff->list); |
| break; |
| } |
| spin_unlock_irqrestore(&adapter->error_list_lock, flags); |
| |
| if (!found) { |
| dev_err(dev, "Couldn't find error id %x\n", |
| crq->request_error_rsp.error_id); |
| return; |
| } |
| |
| dev_err(dev, "Detailed info for error id %x:", |
| crq->request_error_rsp.error_id); |
| |
| for (i = 0; i < error_buff->len; i++) { |
| pr_cont("%02x", (int)error_buff->buff[i]); |
| if (i % 8 == 7) |
| pr_cont(" "); |
| } |
| pr_cont("\n"); |
| |
| dma_unmap_single(dev, error_buff->dma, error_buff->len, |
| DMA_FROM_DEVICE); |
| kfree(error_buff->buff); |
| kfree(error_buff); |
| } |
| |
| static void handle_dump_size_rsp(union ibmvnic_crq *crq, |
| struct ibmvnic_adapter *adapter) |
| { |
| int len = be32_to_cpu(crq->request_dump_size_rsp.len); |
| struct ibmvnic_inflight_cmd *inflight_cmd; |
| struct device *dev = &adapter->vdev->dev; |
| union ibmvnic_crq newcrq; |
| unsigned long flags; |
| |
| /* allocate and map buffer */ |
| adapter->dump_data = kmalloc(len, GFP_KERNEL); |
| if (!adapter->dump_data) { |
| complete(&adapter->fw_done); |
| return; |
| } |
| |
| adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len, |
| DMA_FROM_DEVICE); |
| |
| if (dma_mapping_error(dev, adapter->dump_data_token)) { |
| if (!firmware_has_feature(FW_FEATURE_CMO)) |
| dev_err(dev, "Couldn't map dump data\n"); |
| kfree(adapter->dump_data); |
| complete(&adapter->fw_done); |
| return; |
| } |
| |
| inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC); |
| if (!inflight_cmd) { |
| dma_unmap_single(dev, adapter->dump_data_token, len, |
| DMA_FROM_DEVICE); |
| kfree(adapter->dump_data); |
| complete(&adapter->fw_done); |
| return; |
| } |
| |
| memset(&newcrq, 0, sizeof(newcrq)); |
| newcrq.request_dump.first = IBMVNIC_CRQ_CMD; |
| newcrq.request_dump.cmd = REQUEST_DUMP; |
| newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token); |
| newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size); |
| |
| memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq)); |
| |
| spin_lock_irqsave(&adapter->inflight_lock, flags); |
| list_add_tail(&inflight_cmd->list, &adapter->inflight); |
| spin_unlock_irqrestore(&adapter->inflight_lock, flags); |
| |
| ibmvnic_send_crq(adapter, &newcrq); |
| } |
| |
| static void handle_error_indication(union ibmvnic_crq *crq, |
| struct ibmvnic_adapter *adapter) |
| { |
| int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz); |
| struct ibmvnic_inflight_cmd *inflight_cmd; |
| struct device *dev = &adapter->vdev->dev; |
| struct ibmvnic_error_buff *error_buff; |
| union ibmvnic_crq new_crq; |
| unsigned long flags; |
| |
| dev_err(dev, "Firmware reports %serror id %x, cause %d\n", |
| crq->error_indication. |
| flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "", |
| crq->error_indication.error_id, |
| crq->error_indication.error_cause); |
| |
| error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC); |
| if (!error_buff) |
| return; |
| |
| error_buff->buff = kmalloc(detail_len, GFP_ATOMIC); |
| if (!error_buff->buff) { |
| kfree(error_buff); |
| return; |
| } |
| |
| error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len, |
| DMA_FROM_DEVICE); |
| if (dma_mapping_error(dev, error_buff->dma)) { |
| if (!firmware_has_feature(FW_FEATURE_CMO)) |
| dev_err(dev, "Couldn't map error buffer\n"); |
| kfree(error_buff->buff); |
| kfree(error_buff); |
| return; |
| } |
| |
| inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC); |
| if (!inflight_cmd) { |
| dma_unmap_single(dev, error_buff->dma, detail_len, |
| DMA_FROM_DEVICE); |
| kfree(error_buff->buff); |
| kfree(error_buff); |
| return; |
| } |
| |
| error_buff->len = detail_len; |
| error_buff->error_id = crq->error_indication.error_id; |
| |
| spin_lock_irqsave(&adapter->error_list_lock, flags); |
| list_add_tail(&error_buff->list, &adapter->errors); |
| spin_unlock_irqrestore(&adapter->error_list_lock, flags); |
| |
| memset(&new_crq, 0, sizeof(new_crq)); |
| new_crq.request_error_info.first = IBMVNIC_CRQ_CMD; |
| new_crq.request_error_info.cmd = REQUEST_ERROR_INFO; |
| new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma); |
| new_crq.request_error_info.len = cpu_to_be32(detail_len); |
| new_crq.request_error_info.error_id = crq->error_indication.error_id; |
| |
| memcpy(&inflight_cmd->crq, &crq, sizeof(crq)); |
| |
| spin_lock_irqsave(&adapter->inflight_lock, flags); |
| list_add_tail(&inflight_cmd->list, &adapter->inflight); |
| spin_unlock_irqrestore(&adapter->inflight_lock, flags); |
| |
| ibmvnic_send_crq(adapter, &new_crq); |
| } |
| |
| static void handle_change_mac_rsp(union ibmvnic_crq *crq, |
| struct ibmvnic_adapter *adapter) |
| { |
| struct net_device *netdev = adapter->netdev; |
| struct device *dev = &adapter->vdev->dev; |
| long rc; |
| |
| rc = crq->change_mac_addr_rsp.rc.code; |
| if (rc) { |
| dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); |
| return; |
| } |
| memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], |
| ETH_ALEN); |
| } |
| |
| static void handle_request_cap_rsp(union ibmvnic_crq *crq, |
| struct ibmvnic_adapter *adapter) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| u64 *req_value; |
| char *name; |
| |
| switch (be16_to_cpu(crq->request_capability_rsp.capability)) { |
| case REQ_TX_QUEUES: |
| req_value = &adapter->req_tx_queues; |
| name = "tx"; |
| break; |
| case REQ_RX_QUEUES: |
| req_value = &adapter->req_rx_queues; |
| name = "rx"; |
| break; |
| case REQ_RX_ADD_QUEUES: |
| req_value = &adapter->req_rx_add_queues; |
| name = "rx_add"; |
| break; |
| case REQ_TX_ENTRIES_PER_SUBCRQ: |
| req_value = &adapter->req_tx_entries_per_subcrq; |
| name = "tx_entries_per_subcrq"; |
| break; |
| case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: |
| req_value = &adapter->req_rx_add_entries_per_subcrq; |
| name = "rx_add_entries_per_subcrq"; |
| break; |
| case REQ_MTU: |
| req_value = &adapter->req_mtu; |
| name = "mtu"; |
| break; |
| case PROMISC_REQUESTED: |
| req_value = &adapter->promisc; |
| name = "promisc"; |
| break; |
| default: |
| dev_err(dev, "Got invalid cap request rsp %d\n", |
| crq->request_capability.capability); |
| return; |
| } |
| |
| switch (crq->request_capability_rsp.rc.code) { |
| case SUCCESS: |
| break; |
| case PARTIALSUCCESS: |
| dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", |
| *req_value, |
| (long int)be32_to_cpu(crq->request_capability_rsp. |
| number), name); |
| release_sub_crqs_no_irqs(adapter); |
| *req_value = be32_to_cpu(crq->request_capability_rsp.number); |
| init_sub_crqs(adapter, 1); |
| return; |
| default: |
| dev_err(dev, "Error %d in request cap rsp\n", |
| crq->request_capability_rsp.rc.code); |
| return; |
| } |
| |
| /* Done receiving requested capabilities, query IP offload support */ |
| if (++adapter->requested_caps == 7) { |
| union ibmvnic_crq newcrq; |
| int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); |
| struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = |
| &adapter->ip_offload_buf; |
| |
| adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, |
| buf_sz, |
| DMA_FROM_DEVICE); |
| |
| if (dma_mapping_error(dev, adapter->ip_offload_tok)) { |
| if (!firmware_has_feature(FW_FEATURE_CMO)) |
| dev_err(dev, "Couldn't map offload buffer\n"); |
| return; |
| } |
| |
| memset(&newcrq, 0, sizeof(newcrq)); |
| newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; |
| newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; |
| newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); |
| newcrq.query_ip_offload.ioba = |
| cpu_to_be32(adapter->ip_offload_tok); |
| |
| ibmvnic_send_crq(adapter, &newcrq); |
| } |
| } |
| |
| static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, |
| struct ibmvnic_adapter *adapter) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; |
| struct ibmvnic_login_buffer *login = adapter->login_buf; |
| union ibmvnic_crq crq; |
| int i; |
| |
| dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, |
| DMA_BIDIRECTIONAL); |
| dma_unmap_single(dev, adapter->login_rsp_buf_token, |
| adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL); |
| |
| /* If the number of queues requested can't be allocated by the |
| * server, the login response will return with code 1. We will need |
| * to resend the login buffer with fewer queues requested. |
| */ |
| if (login_rsp_crq->generic.rc.code) { |
| adapter->renegotiate = true; |
| complete(&adapter->init_done); |
| return 0; |
| } |
| |
| netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); |
| for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { |
| netdev_dbg(adapter->netdev, "%016lx\n", |
| ((unsigned long int *)(adapter->login_rsp_buf))[i]); |
| } |
| |
| /* Sanity checks */ |
| if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || |
| (be32_to_cpu(login->num_rxcomp_subcrqs) * |
| adapter->req_rx_add_queues != |
| be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { |
| dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); |
| ibmvnic_remove(adapter->vdev); |
| return -EIO; |
| } |
| complete(&adapter->init_done); |
| |
| memset(&crq, 0, sizeof(crq)); |
| crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD; |
| crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM; |
| ibmvnic_send_crq(adapter, &crq); |
| |
| return 0; |
| } |
| |
| static void handle_request_map_rsp(union ibmvnic_crq *crq, |
| struct ibmvnic_adapter *adapter) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| u8 map_id = crq->request_map_rsp.map_id; |
| int tx_subcrqs; |
| int rx_subcrqs; |
| long rc; |
| int i; |
| |
| tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); |
| rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); |
| |
| rc = crq->request_map_rsp.rc.code; |
| if (rc) { |
| dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc); |
| adapter->map_id--; |
| /* need to find and zero tx/rx_pool map_id */ |
| for (i = 0; i < tx_subcrqs; i++) { |
| if (adapter->tx_pool[i].long_term_buff.map_id == map_id) |
| adapter->tx_pool[i].long_term_buff.map_id = 0; |
| } |
| for (i = 0; i < rx_subcrqs; i++) { |
| if (adapter->rx_pool[i].long_term_buff.map_id == map_id) |
| adapter->rx_pool[i].long_term_buff.map_id = 0; |
| } |
| } |
| complete(&adapter->fw_done); |
| } |
| |
| static void handle_request_unmap_rsp(union ibmvnic_crq *crq, |
| struct ibmvnic_adapter *adapter) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| long rc; |
| |
| rc = crq->request_unmap_rsp.rc.code; |
| if (rc) |
| dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); |
| } |
| |
| static void handle_query_map_rsp(union ibmvnic_crq *crq, |
| struct ibmvnic_adapter *adapter) |
| { |
| struct net_device *netdev = adapter->netdev; |
| struct device *dev = &adapter->vdev->dev; |
| long rc; |
| |
| rc = crq->query_map_rsp.rc.code; |
| if (rc) { |
| dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); |
| return; |
| } |
| netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", |
| crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, |
| crq->query_map_rsp.free_pages); |
| } |
| |
| static void handle_query_cap_rsp(union ibmvnic_crq *crq, |
| struct ibmvnic_adapter *adapter) |
| { |
| struct net_device *netdev = adapter->netdev; |
| struct device *dev = &adapter->vdev->dev; |
| long rc; |
| |
| atomic_dec(&adapter->running_cap_queries); |
| netdev_dbg(netdev, "Outstanding queries: %d\n", |
| atomic_read(&adapter->running_cap_queries)); |
| rc = crq->query_capability.rc.code; |
| if (rc) { |
| dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); |
| goto out; |
| } |
| |
| switch (be16_to_cpu(crq->query_capability.capability)) { |
| case MIN_TX_QUEUES: |
| adapter->min_tx_queues = |
| be64_to_cpu(crq->query_capability.number); |
| netdev_dbg(netdev, "min_tx_queues = %lld\n", |
| adapter->min_tx_queues); |
| break; |
| case MIN_RX_QUEUES: |
| adapter->min_rx_queues = |
| be64_to_cpu(crq->query_capability.number); |
| netdev_dbg(netdev, "min_rx_queues = %lld\n", |
| adapter->min_rx_queues); |
| break; |
| case MIN_RX_ADD_QUEUES: |
| adapter->min_rx_add_queues = |
| be64_to_cpu(crq->query_capability.number); |
| netdev_dbg(netdev, "min_rx_add_queues = %lld\n", |
| adapter->min_rx_add_queues); |
| break; |
| case MAX_TX_QUEUES: |
| adapter->max_tx_queues = |
| be64_to_cpu(crq->query_capability.number); |
| netdev_dbg(netdev, "max_tx_queues = %lld\n", |
| adapter->max_tx_queues); |
| break; |
| case MAX_RX_QUEUES: |
| adapter->max_rx_queues = |
| be64_to_cpu(crq->query_capability.number); |
| netdev_dbg(netdev, "max_rx_queues = %lld\n", |
| adapter->max_rx_queues); |
| break; |
| case MAX_RX_ADD_QUEUES: |
| adapter->max_rx_add_queues = |
| be64_to_cpu(crq->query_capability.number); |
| netdev_dbg(netdev, "max_rx_add_queues = %lld\n", |
| adapter->max_rx_add_queues); |
| break; |
| case MIN_TX_ENTRIES_PER_SUBCRQ: |
| adapter->min_tx_entries_per_subcrq = |
| be64_to_cpu(crq->query_capability.number); |
| netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", |
| adapter->min_tx_entries_per_subcrq); |
| break; |
| case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: |
| adapter->min_rx_add_entries_per_subcrq = |
| be64_to_cpu(crq->query_capability.number); |
| netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", |
| adapter->min_rx_add_entries_per_subcrq); |
| break; |
| case MAX_TX_ENTRIES_PER_SUBCRQ: |
| adapter->max_tx_entries_per_subcrq = |
| be64_to_cpu(crq->query_capability.number); |
| netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", |
| adapter->max_tx_entries_per_subcrq); |
| break; |
| case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: |
| adapter->max_rx_add_entries_per_subcrq = |
| be64_to_cpu(crq->query_capability.number); |
| netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", |
| adapter->max_rx_add_entries_per_subcrq); |
| break; |
| case TCP_IP_OFFLOAD: |
| adapter->tcp_ip_offload = |
| be64_to_cpu(crq->query_capability.number); |
| netdev_dbg(netdev, "tcp_ip_offload = %lld\n", |
| adapter->tcp_ip_offload); |
| break; |
| case PROMISC_SUPPORTED: |
| adapter->promisc_supported = |
| be64_to_cpu(crq->query_capability.number); |
| netdev_dbg(netdev, "promisc_supported = %lld\n", |
| adapter->promisc_supported); |
| break; |
| case MIN_MTU: |
| adapter->min_mtu = be64_to_cpu(crq->query_capability.number); |
| netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); |
| break; |
| case MAX_MTU: |
| adapter->max_mtu = be64_to_cpu(crq->query_capability.number); |
| netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); |
| break; |
| case MAX_MULTICAST_FILTERS: |
| adapter->max_multicast_filters = |
| be64_to_cpu(crq->query_capability.number); |
| netdev_dbg(netdev, "max_multicast_filters = %lld\n", |
| adapter->max_multicast_filters); |
| break; |
| case VLAN_HEADER_INSERTION: |
| adapter->vlan_header_insertion = |
| be64_to_cpu(crq->query_capability.number); |
| if (adapter->vlan_header_insertion) |
| netdev->features |= NETIF_F_HW_VLAN_STAG_TX; |
| netdev_dbg(netdev, "vlan_header_insertion = %lld\n", |
| adapter->vlan_header_insertion); |
| break; |
| case MAX_TX_SG_ENTRIES: |
| adapter->max_tx_sg_entries = |
| be64_to_cpu(crq->query_capability.number); |
| netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", |
| adapter->max_tx_sg_entries); |
| break; |
| case RX_SG_SUPPORTED: |
| adapter->rx_sg_supported = |
| be64_to_cpu(crq->query_capability.number); |
| netdev_dbg(netdev, "rx_sg_supported = %lld\n", |
| adapter->rx_sg_supported); |
| break; |
| case OPT_TX_COMP_SUB_QUEUES: |
| adapter->opt_tx_comp_sub_queues = |
| be64_to_cpu(crq->query_capability.number); |
| netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", |
| adapter->opt_tx_comp_sub_queues); |
| break; |
| case OPT_RX_COMP_QUEUES: |
| adapter->opt_rx_comp_queues = |
| be64_to_cpu(crq->query_capability.number); |
| netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", |
| adapter->opt_rx_comp_queues); |
| break; |
| case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: |
| adapter->opt_rx_bufadd_q_per_rx_comp_q = |
| be64_to_cpu(crq->query_capability.number); |
| netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", |
| adapter->opt_rx_bufadd_q_per_rx_comp_q); |
| break; |
| case OPT_TX_ENTRIES_PER_SUBCRQ: |
| adapter->opt_tx_entries_per_subcrq = |
| be64_to_cpu(crq->query_capability.number); |
| netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", |
| adapter->opt_tx_entries_per_subcrq); |
| break; |
| case OPT_RXBA_ENTRIES_PER_SUBCRQ: |
| adapter->opt_rxba_entries_per_subcrq = |
| be64_to_cpu(crq->query_capability.number); |
| netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", |
| adapter->opt_rxba_entries_per_subcrq); |
| break; |
| case TX_RX_DESC_REQ: |
| adapter->tx_rx_desc_req = crq->query_capability.number; |
| netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", |
| adapter->tx_rx_desc_req); |
| break; |
| |
| default: |
| netdev_err(netdev, "Got invalid cap rsp %d\n", |
| crq->query_capability.capability); |
| } |
| |
| out: |
| if (atomic_read(&adapter->running_cap_queries) == 0) |
| init_sub_crqs(adapter, 0); |
| /* We're done querying the capabilities, initialize sub-crqs */ |
| } |
| |
| static void handle_control_ras_rsp(union ibmvnic_crq *crq, |
| struct ibmvnic_adapter *adapter) |
| { |
| u8 correlator = crq->control_ras_rsp.correlator; |
| struct device *dev = &adapter->vdev->dev; |
| bool found = false; |
| int i; |
| |
| if (crq->control_ras_rsp.rc.code) { |
| dev_warn(dev, "Control ras failed rc=%d\n", |
| crq->control_ras_rsp.rc.code); |
| return; |
| } |
| |
| for (i = 0; i < adapter->ras_comp_num; i++) { |
| if (adapter->ras_comps[i].correlator == correlator) { |
| found = true; |
| break; |
| } |
| } |
| |
| if (!found) { |
| dev_warn(dev, "Correlator not found on control_ras_rsp\n"); |
| return; |
| } |
| |
| switch (crq->control_ras_rsp.op) { |
| case IBMVNIC_TRACE_LEVEL: |
| adapter->ras_comps[i].trace_level = crq->control_ras.level; |
| break; |
| case IBMVNIC_ERROR_LEVEL: |
| adapter->ras_comps[i].error_check_level = |
| crq->control_ras.level; |
| break; |
| case IBMVNIC_TRACE_PAUSE: |
| adapter->ras_comp_int[i].paused = 1; |
| break; |
| case IBMVNIC_TRACE_RESUME: |
| adapter->ras_comp_int[i].paused = 0; |
| break; |
| case IBMVNIC_TRACE_ON: |
| adapter->ras_comps[i].trace_on = 1; |
| break; |
| case IBMVNIC_TRACE_OFF: |
| adapter->ras_comps[i].trace_on = 0; |
| break; |
| case IBMVNIC_CHG_TRACE_BUFF_SZ: |
| /* trace_buff_sz is 3 bytes, stuff it into an int */ |
| ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0; |
| ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] = |
| crq->control_ras_rsp.trace_buff_sz[0]; |
| ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] = |
| crq->control_ras_rsp.trace_buff_sz[1]; |
| ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] = |
| crq->control_ras_rsp.trace_buff_sz[2]; |
| break; |
| default: |
| dev_err(dev, "invalid op %d on control_ras_rsp", |
| crq->control_ras_rsp.op); |
| } |
| } |
| |
| static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len, |
| loff_t *ppos) |
| { |
| struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; |
| struct ibmvnic_adapter *adapter = ras_comp_int->adapter; |
| struct device *dev = &adapter->vdev->dev; |
| struct ibmvnic_fw_trace_entry *trace; |
| int num = ras_comp_int->num; |
| union ibmvnic_crq crq; |
| dma_addr_t trace_tok; |
| |
| if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size)) |
| return 0; |
| |
| trace = |
| dma_alloc_coherent(dev, |
| be32_to_cpu(adapter->ras_comps[num]. |
| trace_buff_size), &trace_tok, |
| GFP_KERNEL); |
| if (!trace) { |
| dev_err(dev, "Couldn't alloc trace buffer\n"); |
| return 0; |
| } |
| |
| memset(&crq, 0, sizeof(crq)); |
| crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD; |
| crq.collect_fw_trace.cmd = COLLECT_FW_TRACE; |
| crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator; |
| crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok); |
| crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size; |
| ibmvnic_send_crq(adapter, &crq); |
| |
| init_completion(&adapter->fw_done); |
| wait_for_completion(&adapter->fw_done); |
| |
| if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size)) |
| len = |
| be32_to_cpu(adapter->ras_comps[num].trace_buff_size) - |
| *ppos; |
| |
| copy_to_user(user_buf, &((u8 *)trace)[*ppos], len); |
| |
| dma_free_coherent(dev, |
| be32_to_cpu(adapter->ras_comps[num].trace_buff_size), |
| trace, trace_tok); |
| *ppos += len; |
| return len; |
| } |
| |
| static const struct file_operations trace_ops = { |
| .owner = THIS_MODULE, |
| .open = simple_open, |
| .read = trace_read, |
| }; |
| |
| static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len, |
| loff_t *ppos) |
| { |
| struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; |
| struct ibmvnic_adapter *adapter = ras_comp_int->adapter; |
| int num = ras_comp_int->num; |
| char buff[5]; /* 1 or 0 plus \n and \0 */ |
| int size; |
| |
| size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused); |
| |
| if (*ppos >= size) |
| return 0; |
| |
| copy_to_user(user_buf, buff, size); |
| *ppos += size; |
| return size; |
| } |
| |
| static ssize_t paused_write(struct file *file, const char __user *user_buf, |
| size_t len, loff_t *ppos) |
| { |
| struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; |
| struct ibmvnic_adapter *adapter = ras_comp_int->adapter; |
| int num = ras_comp_int->num; |
| union ibmvnic_crq crq; |
| unsigned long val; |
| char buff[9]; /* decimal max int plus \n and \0 */ |
| |
| copy_from_user(buff, user_buf, sizeof(buff)); |
| val = kstrtoul(buff, 10, NULL); |
| |
| adapter->ras_comp_int[num].paused = val ? 1 : 0; |
| |
| memset(&crq, 0, sizeof(crq)); |
| crq.control_ras.first = IBMVNIC_CRQ_CMD; |
| crq.control_ras.cmd = CONTROL_RAS; |
| crq.control_ras.correlator = adapter->ras_comps[num].correlator; |
| crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME; |
| ibmvnic_send_crq(adapter, &crq); |
| |
| return len; |
| } |
| |
| static const struct file_operations paused_ops = { |
| .owner = THIS_MODULE, |
| .open = simple_open, |
| .read = paused_read, |
| .write = paused_write, |
| }; |
| |
| static ssize_t tracing_read(struct file *file, char __user *user_buf, |
| size_t len, loff_t *ppos) |
| { |
| struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; |
| struct ibmvnic_adapter *adapter = ras_comp_int->adapter; |
| int num = ras_comp_int->num; |
| char buff[5]; /* 1 or 0 plus \n and \0 */ |
| int size; |
| |
| size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on); |
| |
| if (*ppos >= size) |
| return 0; |
| |
| copy_to_user(user_buf, buff, size); |
| *ppos += size; |
| return size; |
| } |
| |
| static ssize_t tracing_write(struct file *file, const char __user *user_buf, |
| size_t len, loff_t *ppos) |
| { |
| struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; |
| struct ibmvnic_adapter *adapter = ras_comp_int->adapter; |
| int num = ras_comp_int->num; |
| union ibmvnic_crq crq; |
| unsigned long val; |
| char buff[9]; /* decimal max int plus \n and \0 */ |
| |
| copy_from_user(buff, user_buf, sizeof(buff)); |
| val = kstrtoul(buff, 10, NULL); |
| |
| memset(&crq, 0, sizeof(crq)); |
| crq.control_ras.first = IBMVNIC_CRQ_CMD; |
| crq.control_ras.cmd = CONTROL_RAS; |
| crq.control_ras.correlator = adapter->ras_comps[num].correlator; |
| crq.control_ras.op = val ? IBMVNIC_TRACE_ON : IBMVNIC_TRACE_OFF; |
| |
| return len; |
| } |
| |
| static const struct file_operations tracing_ops = { |
| .owner = THIS_MODULE, |
| .open = simple_open, |
| .read = tracing_read, |
| .write = tracing_write, |
| }; |
| |
| static ssize_t error_level_read(struct file *file, char __user *user_buf, |
| size_t len, loff_t *ppos) |
| { |
| struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; |
| struct ibmvnic_adapter *adapter = ras_comp_int->adapter; |
| int num = ras_comp_int->num; |
| char buff[5]; /* decimal max char plus \n and \0 */ |
| int size; |
| |
| size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level); |
| |
| if (*ppos >= size) |
| return 0; |
| |
| copy_to_user(user_buf, buff, size); |
| *ppos += size; |
| return size; |
| } |
| |
| static ssize_t error_level_write(struct file *file, const char __user *user_buf, |
| size_t len, loff_t *ppos) |
| { |
| struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; |
| struct ibmvnic_adapter *adapter = ras_comp_int->adapter; |
| int num = ras_comp_int->num; |
| union ibmvnic_crq crq; |
| unsigned long val; |
| char buff[9]; /* decimal max int plus \n and \0 */ |
| |
| copy_from_user(buff, user_buf, sizeof(buff)); |
| val = kstrtoul(buff, 10, NULL); |
| |
| if (val > 9) |
| val = 9; |
| |
| memset(&crq, 0, sizeof(crq)); |
| crq.control_ras.first = IBMVNIC_CRQ_CMD; |
| crq.control_ras.cmd = CONTROL_RAS; |
| crq.control_ras.correlator = adapter->ras_comps[num].correlator; |
| crq.control_ras.op = IBMVNIC_ERROR_LEVEL; |
| crq.control_ras.level = val; |
| ibmvnic_send_crq(adapter, &crq); |
| |
| return len; |
| } |
| |
| static const struct file_operations error_level_ops = { |
| .owner = THIS_MODULE, |
| .open = simple_open, |
| .read = error_level_read, |
| .write = error_level_write, |
| }; |
| |
| static ssize_t trace_level_read(struct file *file, char __user *user_buf, |
| size_t len, loff_t *ppos) |
| { |
| struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; |
| struct ibmvnic_adapter *adapter = ras_comp_int->adapter; |
| int num = ras_comp_int->num; |
| char buff[5]; /* decimal max char plus \n and \0 */ |
| int size; |
| |
| size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level); |
| if (*ppos >= size) |
| return 0; |
| |
| copy_to_user(user_buf, buff, size); |
| *ppos += size; |
| return size; |
| } |
| |
| static ssize_t trace_level_write(struct file *file, const char __user *user_buf, |
| size_t len, loff_t *ppos) |
| { |
| struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; |
| struct ibmvnic_adapter *adapter = ras_comp_int->adapter; |
| union ibmvnic_crq crq; |
| unsigned long val; |
| char buff[9]; /* decimal max int plus \n and \0 */ |
| |
| copy_from_user(buff, user_buf, sizeof(buff)); |
| val = kstrtoul(buff, 10, NULL); |
| if (val > 9) |
| val = 9; |
| |
| memset(&crq, 0, sizeof(crq)); |
| crq.control_ras.first = IBMVNIC_CRQ_CMD; |
| crq.control_ras.cmd = CONTROL_RAS; |
| crq.control_ras.correlator = |
| adapter->ras_comps[ras_comp_int->num].correlator; |
| crq.control_ras.op = IBMVNIC_TRACE_LEVEL; |
| crq.control_ras.level = val; |
| ibmvnic_send_crq(adapter, &crq); |
| |
| return len; |
| } |
| |
| static const struct file_operations trace_level_ops = { |
| .owner = THIS_MODULE, |
| .open = simple_open, |
| .read = trace_level_read, |
| .write = trace_level_write, |
| }; |
| |
| static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf, |
| size_t len, loff_t *ppos) |
| { |
| struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; |
| struct ibmvnic_adapter *adapter = ras_comp_int->adapter; |
| int num = ras_comp_int->num; |
| char buff[9]; /* decimal max int plus \n and \0 */ |
| int size; |
| |
| size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size); |
| if (*ppos >= size) |
| return 0; |
| |
| copy_to_user(user_buf, buff, size); |
| *ppos += size; |
| return size; |
| } |
| |
| static ssize_t trace_buff_size_write(struct file *file, |
| const char __user *user_buf, size_t len, |
| loff_t *ppos) |
| { |
| struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; |
| struct ibmvnic_adapter *adapter = ras_comp_int->adapter; |
| union ibmvnic_crq crq; |
| unsigned long val; |
| char buff[9]; /* decimal max int plus \n and \0 */ |
| |
| copy_from_user(buff, user_buf, sizeof(buff)); |
| val = kstrtoul(buff, 10, NULL); |
| |
| memset(&crq, 0, sizeof(crq)); |
| crq.control_ras.first = IBMVNIC_CRQ_CMD; |
| crq.control_ras.cmd = CONTROL_RAS; |
| crq.control_ras.correlator = |
| adapter->ras_comps[ras_comp_int->num].correlator; |
| crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ; |
| /* trace_buff_sz is 3 bytes, stuff an int into it */ |
| crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5]; |
| crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6]; |
| crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7]; |
| ibmvnic_send_crq(adapter, &crq); |
| |
| return len; |
| } |
| |
| static const struct file_operations trace_size_ops = { |
| .owner = THIS_MODULE, |
| .open = simple_open, |
| .read = trace_buff_size_read, |
| .write = trace_buff_size_write, |
| }; |
| |
| static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq, |
| struct ibmvnic_adapter *adapter) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| struct dentry *dir_ent; |
| struct dentry *ent; |
| int i; |
| |
| debugfs_remove_recursive(adapter->ras_comps_ent); |
| |
| adapter->ras_comps_ent = debugfs_create_dir("ras_comps", |
| adapter->debugfs_dir); |
| if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) { |
| dev_info(dev, "debugfs create ras_comps dir failed\n"); |
| return; |
| } |
| |
| for (i = 0; i < adapter->ras_comp_num; i++) { |
| dir_ent = debugfs_create_dir(adapter->ras_comps[i].name, |
| adapter->ras_comps_ent); |
| if (!dir_ent || IS_ERR(dir_ent)) { |
| dev_info(dev, "debugfs create %s dir failed\n", |
| adapter->ras_comps[i].name); |
| continue; |
| } |
| |
| adapter->ras_comp_int[i].adapter = adapter; |
| adapter->ras_comp_int[i].num = i; |
| adapter->ras_comp_int[i].desc_blob.data = |
| &adapter->ras_comps[i].description; |
| adapter->ras_comp_int[i].desc_blob.size = |
| sizeof(adapter->ras_comps[i].description); |
| |
| /* Don't need to remember the dentry's because the debugfs dir |
| * gets removed recursively |
| */ |
| ent = debugfs_create_blob("description", S_IRUGO, dir_ent, |
| &adapter->ras_comp_int[i].desc_blob); |
| ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR, |
| dir_ent, &adapter->ras_comp_int[i], |
| &trace_size_ops); |
| ent = debugfs_create_file("trace_level", |
| S_IRUGO | |
| (adapter->ras_comps[i].trace_level != |
| 0xFF ? S_IWUSR : 0), |
| dir_ent, &adapter->ras_comp_int[i], |
| &trace_level_ops); |
| ent = debugfs_create_file("error_level", |
| S_IRUGO | |
| (adapter-> |
| ras_comps[i].error_check_level != |
| 0xFF ? S_IWUSR : 0), |
| dir_ent, &adapter->ras_comp_int[i], |
| &trace_level_ops); |
| ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR, |
| dir_ent, &adapter->ras_comp_int[i], |
| &tracing_ops); |
| ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR, |
| dir_ent, &adapter->ras_comp_int[i], |
| &paused_ops); |
| ent = debugfs_create_file("trace", S_IRUGO, dir_ent, |
| &adapter->ras_comp_int[i], |
| &trace_ops); |
| } |
| } |
| |
| static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq, |
| struct ibmvnic_adapter *adapter) |
| { |
| int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component); |
| struct device *dev = &adapter->vdev->dev; |
| union ibmvnic_crq newcrq; |
| |
| adapter->ras_comps = dma_alloc_coherent(dev, len, |
| &adapter->ras_comps_tok, |
| GFP_KERNEL); |
| if (!adapter->ras_comps) { |
| if (!firmware_has_feature(FW_FEATURE_CMO)) |
| dev_err(dev, "Couldn't alloc fw comps buffer\n"); |
| return; |
| } |
| |
| adapter->ras_comp_int = kmalloc(adapter->ras_comp_num * |
| sizeof(struct ibmvnic_fw_comp_internal), |
| GFP_KERNEL); |
| if (!adapter->ras_comp_int) |
| dma_free_coherent(dev, len, adapter->ras_comps, |
| adapter->ras_comps_tok); |
| |
| memset(&newcrq, 0, sizeof(newcrq)); |
| newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD; |
| newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS; |
| newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok); |
| newcrq.request_ras_comps.len = cpu_to_be32(len); |
| ibmvnic_send_crq(adapter, &newcrq); |
| } |
| |
| static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter) |
| { |
| struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1; |
| struct device *dev = &adapter->vdev->dev; |
| struct ibmvnic_error_buff *error_buff, *tmp2; |
| unsigned long flags; |
| unsigned long flags2; |
| |
| spin_lock_irqsave(&adapter->inflight_lock, flags); |
| list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) { |
| switch (inflight_cmd->crq.generic.cmd) { |
| case LOGIN: |
| dma_unmap_single(dev, adapter->login_buf_token, |
| adapter->login_buf_sz, |
| DMA_BIDIRECTIONAL); |
| dma_unmap_single(dev, adapter->login_rsp_buf_token, |
| adapter->login_rsp_buf_sz, |
| DMA_BIDIRECTIONAL); |
| kfree(adapter->login_rsp_buf); |
| kfree(adapter->login_buf); |
| break; |
| case REQUEST_DUMP: |
| complete(&adapter->fw_done); |
| break; |
| case REQUEST_ERROR_INFO: |
| spin_lock_irqsave(&adapter->error_list_lock, flags2); |
| list_for_each_entry_safe(error_buff, tmp2, |
| &adapter->errors, list) { |
| dma_unmap_single(dev, error_buff->dma, |
| error_buff->len, |
| DMA_FROM_DEVICE); |
| kfree(error_buff->buff); |
| list_del(&error_buff->list); |
| kfree(error_buff); |
| } |
| spin_unlock_irqrestore(&adapter->error_list_lock, |
| flags2); |
| break; |
| } |
| list_del(&inflight_cmd->list); |
| kfree(inflight_cmd); |
| } |
| spin_unlock_irqrestore(&adapter->inflight_lock, flags); |
| } |
| |
| static void ibmvnic_xport_event(struct work_struct *work) |
| { |
| struct ibmvnic_adapter *adapter = container_of(work, |
| struct ibmvnic_adapter, |
| ibmvnic_xport); |
| struct device *dev = &adapter->vdev->dev; |
| long rc; |
| |
| ibmvnic_free_inflight(adapter); |
| release_sub_crqs(adapter); |
| if (adapter->migrated) { |
| rc = ibmvnic_reenable_crq_queue(adapter); |
| if (rc) |
| dev_err(dev, "Error after enable rc=%ld\n", rc); |
| adapter->migrated = false; |
| rc = ibmvnic_send_crq_init(adapter); |
| if (rc) |
| dev_err(dev, "Error sending init rc=%ld\n", rc); |
| } |
| } |
| |
| static void ibmvnic_handle_crq(union ibmvnic_crq *crq, |
| struct ibmvnic_adapter *adapter) |
| { |
| struct ibmvnic_generic_crq *gen_crq = &crq->generic; |
| struct net_device *netdev = adapter->netdev; |
| struct device *dev = &adapter->vdev->dev; |
| long rc; |
| |
| netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", |
| ((unsigned long int *)crq)[0], |
| ((unsigned long int *)crq)[1]); |
| switch (gen_crq->first) { |
| case IBMVNIC_CRQ_INIT_RSP: |
| switch (gen_crq->cmd) { |
| case IBMVNIC_CRQ_INIT: |
| dev_info(dev, "Partner initialized\n"); |
| /* Send back a response */ |
| rc = ibmvnic_send_crq_init_complete(adapter); |
| if (!rc) |
| schedule_work(&adapter->vnic_crq_init); |
| else |
| dev_err(dev, "Can't send initrsp rc=%ld\n", rc); |
| break; |
| case IBMVNIC_CRQ_INIT_COMPLETE: |
| dev_info(dev, "Partner initialization complete\n"); |
| send_version_xchg(adapter); |
| break; |
| default: |
| dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); |
| } |
| return; |
| case IBMVNIC_CRQ_XPORT_EVENT: |
| if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { |
| dev_info(dev, "Re-enabling adapter\n"); |
| adapter->migrated = true; |
| schedule_work(&adapter->ibmvnic_xport); |
| } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { |
| dev_info(dev, "Backing device failover detected\n"); |
| netif_carrier_off(netdev); |
| adapter->failover = true; |
| } else { |
| /* The adapter lost the connection */ |
| dev_err(dev, "Virtual Adapter failed (rc=%d)\n", |
| gen_crq->cmd); |
| schedule_work(&adapter->ibmvnic_xport); |
| } |
| return; |
| case IBMVNIC_CRQ_CMD_RSP: |
| break; |
| default: |
| dev_err(dev, "Got an invalid msg type 0x%02x\n", |
| gen_crq->first); |
| return; |
| } |
| |
| switch (gen_crq->cmd) { |
| case VERSION_EXCHANGE_RSP: |
| rc = crq->version_exchange_rsp.rc.code; |
| if (rc) { |
| dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); |
| break; |
| } |
| dev_info(dev, "Partner protocol version is %d\n", |
| crq->version_exchange_rsp.version); |
| if (be16_to_cpu(crq->version_exchange_rsp.version) < |
| ibmvnic_version) |
| ibmvnic_version = |
| be16_to_cpu(crq->version_exchange_rsp.version); |
| send_cap_queries(adapter); |
| break; |
| case QUERY_CAPABILITY_RSP: |
| handle_query_cap_rsp(crq, adapter); |
| break; |
| case QUERY_MAP_RSP: |
| handle_query_map_rsp(crq, adapter); |
| break; |
| case REQUEST_MAP_RSP: |
| handle_request_map_rsp(crq, adapter); |
| break; |
| case REQUEST_UNMAP_RSP: |
| handle_request_unmap_rsp(crq, adapter); |
| break; |
| case REQUEST_CAPABILITY_RSP: |
| handle_request_cap_rsp(crq, adapter); |
| break; |
| case LOGIN_RSP: |
| netdev_dbg(netdev, "Got Login Response\n"); |
| handle_login_rsp(crq, adapter); |
| break; |
| case LOGICAL_LINK_STATE_RSP: |
| netdev_dbg(netdev, "Got Logical Link State Response\n"); |
| adapter->logical_link_state = |
| crq->logical_link_state_rsp.link_state; |
| break; |
| case LINK_STATE_INDICATION: |
| netdev_dbg(netdev, "Got Logical Link State Indication\n"); |
| adapter->phys_link_state = |
| crq->link_state_indication.phys_link_state; |
| adapter->logical_link_state = |
| crq->link_state_indication.logical_link_state; |
| break; |
| case CHANGE_MAC_ADDR_RSP: |
| netdev_dbg(netdev, "Got MAC address change Response\n"); |
| handle_change_mac_rsp(crq, adapter); |
| break; |
| case ERROR_INDICATION: |
| netdev_dbg(netdev, "Got Error Indication\n"); |
| handle_error_indication(crq, adapter); |
| break; |
| case REQUEST_ERROR_RSP: |
| netdev_dbg(netdev, "Got Error Detail Response\n"); |
| handle_error_info_rsp(crq, adapter); |
| break; |
| case REQUEST_STATISTICS_RSP: |
| netdev_dbg(netdev, "Got Statistics Response\n"); |
| complete(&adapter->stats_done); |
| break; |
| case REQUEST_DUMP_SIZE_RSP: |
| netdev_dbg(netdev, "Got Request Dump Size Response\n"); |
| handle_dump_size_rsp(crq, adapter); |
| break; |
| case REQUEST_DUMP_RSP: |
| netdev_dbg(netdev, "Got Request Dump Response\n"); |
| complete(&adapter->fw_done); |
| break; |
| case QUERY_IP_OFFLOAD_RSP: |
| netdev_dbg(netdev, "Got Query IP offload Response\n"); |
| handle_query_ip_offload_rsp(adapter); |
| break; |
| case MULTICAST_CTRL_RSP: |
| netdev_dbg(netdev, "Got multicast control Response\n"); |
| break; |
| case CONTROL_IP_OFFLOAD_RSP: |
| netdev_dbg(netdev, "Got Control IP offload Response\n"); |
| dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, |
| sizeof(adapter->ip_offload_ctrl), |
| DMA_TO_DEVICE); |
| /* We're done with the queries, perform the login */ |
| send_login(adapter); |
| break; |
| case REQUEST_RAS_COMP_NUM_RSP: |
| netdev_dbg(netdev, "Got Request RAS Comp Num Response\n"); |
| if (crq->request_ras_comp_num_rsp.rc.code == 10) { |
| netdev_dbg(netdev, "Request RAS Comp Num not supported\n"); |
| break; |
| } |
| adapter->ras_comp_num = |
| be32_to_cpu(crq->request_ras_comp_num_rsp.num_components); |
| handle_request_ras_comp_num_rsp(crq, adapter); |
| break; |
| case REQUEST_RAS_COMPS_RSP: |
| netdev_dbg(netdev, "Got Request RAS Comps Response\n"); |
| handle_request_ras_comps_rsp(crq, adapter); |
| break; |
| case CONTROL_RAS_RSP: |
| netdev_dbg(netdev, "Got Control RAS Response\n"); |
| handle_control_ras_rsp(crq, adapter); |
| break; |
| case COLLECT_FW_TRACE_RSP: |
| netdev_dbg(netdev, "Got Collect firmware trace Response\n"); |
| complete(&adapter->fw_done); |
| break; |
| default: |
| netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", |
| gen_crq->cmd); |
| } |
| } |
| |
| static irqreturn_t ibmvnic_interrupt(int irq, void *instance) |
| { |
| struct ibmvnic_adapter *adapter = instance; |
| struct ibmvnic_crq_queue *queue = &adapter->crq; |
| struct vio_dev *vdev = adapter->vdev; |
| union ibmvnic_crq *crq; |
| unsigned long flags; |
| bool done = false; |
| |
| spin_lock_irqsave(&queue->lock, flags); |
| vio_disable_interrupts(vdev); |
| while (!done) { |
| /* Pull all the valid messages off the CRQ */ |
| while ((crq = ibmvnic_next_crq(adapter)) != NULL) { |
| ibmvnic_handle_crq(crq, adapter); |
| crq->generic.first = 0; |
| } |
| vio_enable_interrupts(vdev); |
| crq = ibmvnic_next_crq(adapter); |
| if (crq) { |
| vio_disable_interrupts(vdev); |
| ibmvnic_handle_crq(crq, adapter); |
| crq->generic.first = 0; |
| } else { |
| done = true; |
| } |
| } |
| spin_unlock_irqrestore(&queue->lock, flags); |
| return IRQ_HANDLED; |
| } |
| |
| static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) |
| { |
| struct vio_dev *vdev = adapter->vdev; |
| int rc; |
| |
| do { |
| rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); |
| } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| |
| if (rc) |
| dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); |
| |
| return rc; |
| } |
| |
| static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) |
| { |
| struct ibmvnic_crq_queue *crq = &adapter->crq; |
| struct device *dev = &adapter->vdev->dev; |
| struct vio_dev *vdev = adapter->vdev; |
| int rc; |
| |
| /* Close the CRQ */ |
| do { |
| rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
| } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| |
| /* Clean out the queue */ |
| memset(crq->msgs, 0, PAGE_SIZE); |
| crq->cur = 0; |
| |
| /* And re-open it again */ |
| rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, |
| crq->msg_token, PAGE_SIZE); |
| |
| if (rc == H_CLOSED) |
| /* Adapter is good, but other end is not ready */ |
| dev_warn(dev, "Partner adapter not ready\n"); |
| else if (rc != 0) |
| dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); |
| |
| return rc; |
| } |
| |
| static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter) |
| { |
| struct ibmvnic_crq_queue *crq = &adapter->crq; |
| struct vio_dev *vdev = adapter->vdev; |
| long rc; |
| |
| netdev_dbg(adapter->netdev, "Releasing CRQ\n"); |
| free_irq(vdev->irq, adapter); |
| do { |
| rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
| } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| |
| dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, |
| DMA_BIDIRECTIONAL); |
| free_page((unsigned long)crq->msgs); |
| } |
| |
| static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter) |
| { |
| struct ibmvnic_crq_queue *crq = &adapter->crq; |
| struct device *dev = &adapter->vdev->dev; |
| struct vio_dev *vdev = adapter->vdev; |
| int rc, retrc = -ENOMEM; |
| |
| crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); |
| /* Should we allocate more than one page? */ |
| |
| if (!crq->msgs) |
| return -ENOMEM; |
| |
| crq->size = PAGE_SIZE / sizeof(*crq->msgs); |
| crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, |
| DMA_BIDIRECTIONAL); |
| if (dma_mapping_error(dev, crq->msg_token)) |
| goto map_failed; |
| |
| rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, |
| crq->msg_token, PAGE_SIZE); |
| |
| if (rc == H_RESOURCE) |
| /* maybe kexecing and resource is busy. try a reset */ |
| rc = ibmvnic_reset_crq(adapter); |
| retrc = rc; |
| |
| if (rc == H_CLOSED) { |
| dev_warn(dev, "Partner adapter not ready\n"); |
| } else if (rc) { |
| dev_warn(dev, "Error %d opening adapter\n", rc); |
| goto reg_crq_failed; |
| } |
| |
| retrc = 0; |
| |
| netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); |
| rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME, |
| adapter); |
| if (rc) { |
| dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", |
| vdev->irq, rc); |
| goto req_irq_failed; |
| } |
| |
| rc = vio_enable_interrupts(vdev); |
| if (rc) { |
| dev_err(dev, "Error %d enabling interrupts\n", rc); |
| goto req_irq_failed; |
| } |
| |
| crq->cur = 0; |
| spin_lock_init(&crq->lock); |
| |
| return retrc; |
| |
| req_irq_failed: |
| do { |
| rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); |
| } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); |
| reg_crq_failed: |
| dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); |
| map_failed: |
| free_page((unsigned long)crq->msgs); |
| return retrc; |
| } |
| |
| /* debugfs for dump */ |
| static int ibmvnic_dump_show(struct seq_file *seq, void *v) |
| { |
| struct net_device *netdev = seq->private; |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| struct device *dev = &adapter->vdev->dev; |
| union ibmvnic_crq crq; |
| |
| memset(&crq, 0, sizeof(crq)); |
| crq.request_dump_size.first = IBMVNIC_CRQ_CMD; |
| crq.request_dump_size.cmd = REQUEST_DUMP_SIZE; |
| ibmvnic_send_crq(adapter, &crq); |
| |
| init_completion(&adapter->fw_done); |
| wait_for_completion(&adapter->fw_done); |
| |
| seq_write(seq, adapter->dump_data, adapter->dump_data_size); |
| |
| dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size, |
| DMA_BIDIRECTIONAL); |
| |
| kfree(adapter->dump_data); |
| |
| return 0; |
| } |
| |
| static int ibmvnic_dump_open(struct inode *inode, struct file *file) |
| { |
| return single_open(file, ibmvnic_dump_show, inode->i_private); |
| } |
| |
| static const struct file_operations ibmvnic_dump_ops = { |
| .owner = THIS_MODULE, |
| .open = ibmvnic_dump_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = single_release, |
| }; |
| |
| static void handle_crq_init_rsp(struct work_struct *work) |
| { |
| struct ibmvnic_adapter *adapter = container_of(work, |
| struct ibmvnic_adapter, |
| vnic_crq_init); |
| struct device *dev = &adapter->vdev->dev; |
| struct net_device *netdev = adapter->netdev; |
| unsigned long timeout = msecs_to_jiffies(30000); |
| bool restart = false; |
| int rc; |
| |
| if (adapter->failover) { |
| release_sub_crqs(adapter); |
| if (netif_running(netdev)) { |
| netif_tx_disable(netdev); |
| ibmvnic_close(netdev); |
| restart = true; |
| } |
| } |
| |
| send_version_xchg(adapter); |
| reinit_completion(&adapter->init_done); |
| if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { |
| dev_err(dev, "Passive init timeout\n"); |
| goto task_failed; |
| } |
| |
| do { |
| if (adapter->renegotiate) { |
| adapter->renegotiate = false; |
| release_sub_crqs_no_irqs(adapter); |
| send_cap_queries(adapter); |
| |
| reinit_completion(&adapter->init_done); |
| if (!wait_for_completion_timeout(&adapter->init_done, |
| timeout)) { |
| dev_err(dev, "Passive init timeout\n"); |
| goto task_failed; |
| } |
| } |
| } while (adapter->renegotiate); |
| rc = init_sub_crq_irqs(adapter); |
| |
| if (rc) |
| goto task_failed; |
| |
| netdev->real_num_tx_queues = adapter->req_tx_queues; |
| netdev->mtu = adapter->req_mtu; |
| |
| if (adapter->failover) { |
| adapter->failover = false; |
| if (restart) { |
| rc = ibmvnic_open(netdev); |
| if (rc) |
| goto restart_failed; |
| } |
| netif_carrier_on(netdev); |
| return; |
| } |
| |
| rc = register_netdev(netdev); |
| if (rc) { |
| dev_err(dev, |
| "failed to register netdev rc=%d\n", rc); |
| goto register_failed; |
| } |
| dev_info(dev, "ibmvnic registered\n"); |
| |
| return; |
| |
| restart_failed: |
| dev_err(dev, "Failed to restart ibmvnic, rc=%d\n", rc); |
| register_failed: |
| release_sub_crqs(adapter); |
| task_failed: |
| dev_err(dev, "Passive initialization was not successful\n"); |
| } |
| |
| static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) |
| { |
| unsigned long timeout = msecs_to_jiffies(30000); |
| struct ibmvnic_adapter *adapter; |
| struct net_device *netdev; |
| unsigned char *mac_addr_p; |
| struct dentry *ent; |
| char buf[17]; /* debugfs name buf */ |
| int rc; |
| |
| dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", |
| dev->unit_address); |
| |
| mac_addr_p = (unsigned char *)vio_get_attribute(dev, |
| VETH_MAC_ADDR, NULL); |
| if (!mac_addr_p) { |
| dev_err(&dev->dev, |
| "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", |
| __FILE__, __LINE__); |
| return 0; |
| } |
| |
| netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), |
| IBMVNIC_MAX_TX_QUEUES); |
| if (!netdev) |
| return -ENOMEM; |
| |
| adapter = netdev_priv(netdev); |
| dev_set_drvdata(&dev->dev, netdev); |
| adapter->vdev = dev; |
| adapter->netdev = netdev; |
| adapter->failover = false; |
| |
| ether_addr_copy(adapter->mac_addr, mac_addr_p); |
| ether_addr_copy(netdev->dev_addr, adapter->mac_addr); |
| netdev->irq = dev->irq; |
| netdev->netdev_ops = &ibmvnic_netdev_ops; |
| netdev->ethtool_ops = &ibmvnic_ethtool_ops; |
| SET_NETDEV_DEV(netdev, &dev->dev); |
| |
| INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp); |
| INIT_WORK(&adapter->ibmvnic_xport, ibmvnic_xport_event); |
| |
| spin_lock_init(&adapter->stats_lock); |
| |
| rc = ibmvnic_init_crq_queue(adapter); |
| if (rc) { |
| dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc); |
| goto free_netdev; |
| } |
| |
| INIT_LIST_HEAD(&adapter->errors); |
| INIT_LIST_HEAD(&adapter->inflight); |
| spin_lock_init(&adapter->error_list_lock); |
| spin_lock_init(&adapter->inflight_lock); |
| |
| adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats, |
| sizeof(struct ibmvnic_statistics), |
| DMA_FROM_DEVICE); |
| if (dma_mapping_error(&dev->dev, adapter->stats_token)) { |
| if (!firmware_has_feature(FW_FEATURE_CMO)) |
| dev_err(&dev->dev, "Couldn't map stats buffer\n"); |
| rc = -ENOMEM; |
| goto free_crq; |
| } |
| |
| snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address); |
| ent = debugfs_create_dir(buf, NULL); |
| if (!ent || IS_ERR(ent)) { |
| dev_info(&dev->dev, "debugfs create directory failed\n"); |
| adapter->debugfs_dir = NULL; |
| } else { |
| adapter->debugfs_dir = ent; |
| ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir, |
| netdev, &ibmvnic_dump_ops); |
| if (!ent || IS_ERR(ent)) { |
| dev_info(&dev->dev, |
| "debugfs create dump file failed\n"); |
| adapter->debugfs_dump = NULL; |
| } else { |
| adapter->debugfs_dump = ent; |
| } |
| } |
| ibmvnic_send_crq_init(adapter); |
| |
| init_completion(&adapter->init_done); |
| if (!wait_for_completion_timeout(&adapter->init_done, timeout)) |
| return 0; |
| |
| do { |
| if (adapter->renegotiate) { |
| adapter->renegotiate = false; |
| release_sub_crqs_no_irqs(adapter); |
| send_cap_queries(adapter); |
| |
| reinit_completion(&adapter->init_done); |
| if (!wait_for_completion_timeout(&adapter->init_done, |
| timeout)) |
| return 0; |
| } |
| } while (adapter->renegotiate); |
| |
| rc = init_sub_crq_irqs(adapter); |
| if (rc) { |
| dev_err(&dev->dev, "failed to initialize sub crq irqs\n"); |
| goto free_debugfs; |
| } |
| |
| netdev->real_num_tx_queues = adapter->req_tx_queues; |
| netdev->mtu = adapter->req_mtu; |
| |
| rc = register_netdev(netdev); |
| if (rc) { |
| dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); |
| goto free_sub_crqs; |
| } |
| dev_info(&dev->dev, "ibmvnic registered\n"); |
| |
| return 0; |
| |
| free_sub_crqs: |
| release_sub_crqs(adapter); |
| free_debugfs: |
| if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir)) |
| debugfs_remove_recursive(adapter->debugfs_dir); |
| free_crq: |
| ibmvnic_release_crq_queue(adapter); |
| free_netdev: |
| free_netdev(netdev); |
| return rc; |
| } |
| |
| static int ibmvnic_remove(struct vio_dev *dev) |
| { |
| struct net_device *netdev = dev_get_drvdata(&dev->dev); |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| |
| unregister_netdev(netdev); |
| |
| release_sub_crqs(adapter); |
| |
| ibmvnic_release_crq_queue(adapter); |
| |
| if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir)) |
| debugfs_remove_recursive(adapter->debugfs_dir); |
| |
| dma_unmap_single(&dev->dev, adapter->stats_token, |
| sizeof(struct ibmvnic_statistics), DMA_FROM_DEVICE); |
| |
| if (adapter->ras_comps) |
| dma_free_coherent(&dev->dev, |
| adapter->ras_comp_num * |
| sizeof(struct ibmvnic_fw_component), |
| adapter->ras_comps, adapter->ras_comps_tok); |
| |
| kfree(adapter->ras_comp_int); |
| |
| free_netdev(netdev); |
| dev_set_drvdata(&dev->dev, NULL); |
| |
| return 0; |
| } |
| |
| static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) |
| { |
| struct net_device *netdev = dev_get_drvdata(&vdev->dev); |
| struct ibmvnic_adapter *adapter; |
| struct iommu_table *tbl; |
| unsigned long ret = 0; |
| int i; |
| |
| tbl = get_iommu_table_base(&vdev->dev); |
| |
| /* netdev inits at probe time along with the structures we need below*/ |
| if (!netdev) |
| return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); |
| |
| adapter = netdev_priv(netdev); |
| |
| ret += PAGE_SIZE; /* the crq message queue */ |
| ret += adapter->bounce_buffer_size; |
| ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); |
| |
| for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) |
| ret += 4 * PAGE_SIZE; /* the scrq message queue */ |
| |
| for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); |
| i++) |
| ret += adapter->rx_pool[i].size * |
| IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); |
| |
| return ret; |
| } |
| |
| static int ibmvnic_resume(struct device *dev) |
| { |
| struct net_device *netdev = dev_get_drvdata(dev); |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| int i; |
| |
| /* kick the interrupt handlers just in case we lost an interrupt */ |
| for (i = 0; i < adapter->req_rx_queues; i++) |
| ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, |
| adapter->rx_scrq[i]); |
| |
| return 0; |
| } |
| |
| static struct vio_device_id ibmvnic_device_table[] = { |
| {"network", "IBM,vnic"}, |
| {"", "" } |
| }; |
| MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); |
| |
| static const struct dev_pm_ops ibmvnic_pm_ops = { |
| .resume = ibmvnic_resume |
| }; |
| |
| static struct vio_driver ibmvnic_driver = { |
| .id_table = ibmvnic_device_table, |
| .probe = ibmvnic_probe, |
| .remove = ibmvnic_remove, |
| .get_desired_dma = ibmvnic_get_desired_dma, |
| .name = ibmvnic_driver_name, |
| .pm = &ibmvnic_pm_ops, |
| }; |
| |
| /* module functions */ |
| static int __init ibmvnic_module_init(void) |
| { |
| pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, |
| IBMVNIC_DRIVER_VERSION); |
| |
| return vio_register_driver(&ibmvnic_driver); |
| } |
| |
| static void __exit ibmvnic_module_exit(void) |
| { |
| vio_unregister_driver(&ibmvnic_driver); |
| } |
| |
| module_init(ibmvnic_module_init); |
| module_exit(ibmvnic_module_exit); |
