| // SPDX-License-Identifier: GPL-2.0-or-later |
| /**************************************************************************/ |
| /* */ |
| /* 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 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/if_arp.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/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 <linux/if_vlan.h> |
| #include <linux/utsname.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"); |
| 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 *, bool); |
| 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_query_map(struct ibmvnic_adapter *adapter); |
| static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); |
| static int send_request_unmap(struct ibmvnic_adapter *, u8); |
| static int send_login(struct ibmvnic_adapter *adapter); |
| static void send_query_cap(struct ibmvnic_adapter *adapter); |
| static int init_sub_crqs(struct ibmvnic_adapter *); |
| static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); |
| static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset); |
| static void release_crq_queue(struct ibmvnic_adapter *); |
| static int __ibmvnic_set_mac(struct net_device *, u8 *); |
| static int init_crq_queue(struct ibmvnic_adapter *adapter); |
| static int send_query_phys_parms(struct ibmvnic_adapter *adapter); |
| |
| 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; |
| } |
| |
| /** |
| * ibmvnic_wait_for_completion - Check device state and wait for completion |
| * @adapter: private device data |
| * @comp_done: completion structure to wait for |
| * @timeout: time to wait in milliseconds |
| * |
| * Wait for a completion signal or until the timeout limit is reached |
| * while checking that the device is still active. |
| */ |
| static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter, |
| struct completion *comp_done, |
| unsigned long timeout) |
| { |
| struct net_device *netdev; |
| unsigned long div_timeout; |
| u8 retry; |
| |
| netdev = adapter->netdev; |
| retry = 5; |
| div_timeout = msecs_to_jiffies(timeout / retry); |
| while (true) { |
| if (!adapter->crq.active) { |
| netdev_err(netdev, "Device down!\n"); |
| return -ENODEV; |
| } |
| if (!retry--) |
| break; |
| if (wait_for_completion_timeout(comp_done, div_timeout)) |
| return 0; |
| } |
| netdev_err(netdev, "Operation timed out.\n"); |
| return -ETIMEDOUT; |
| } |
| |
| static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_long_term_buff *ltb, int size) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| int rc; |
| |
| 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++; |
| |
| mutex_lock(&adapter->fw_lock); |
| adapter->fw_done_rc = 0; |
| reinit_completion(&adapter->fw_done); |
| rc = send_request_map(adapter, ltb->addr, |
| ltb->size, ltb->map_id); |
| if (rc) { |
| dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); |
| mutex_unlock(&adapter->fw_lock); |
| return rc; |
| } |
| |
| rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); |
| if (rc) { |
| dev_err(dev, |
| "Long term map request aborted or timed out,rc = %d\n", |
| rc); |
| dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); |
| mutex_unlock(&adapter->fw_lock); |
| return rc; |
| } |
| |
| if (adapter->fw_done_rc) { |
| dev_err(dev, "Couldn't map long term buffer,rc = %d\n", |
| adapter->fw_done_rc); |
| dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); |
| mutex_unlock(&adapter->fw_lock); |
| return -1; |
| } |
| mutex_unlock(&adapter->fw_lock); |
| return 0; |
| } |
| |
| static void free_long_term_buff(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_long_term_buff *ltb) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| |
| if (!ltb->buff) |
| return; |
| |
| if (adapter->reset_reason != VNIC_RESET_FAILOVER && |
| adapter->reset_reason != VNIC_RESET_MOBILITY) |
| send_request_unmap(adapter, ltb->map_id); |
| dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); |
| } |
| |
| static int reset_long_term_buff(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_long_term_buff *ltb) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| int rc; |
| |
| memset(ltb->buff, 0, ltb->size); |
| |
| mutex_lock(&adapter->fw_lock); |
| adapter->fw_done_rc = 0; |
| |
| reinit_completion(&adapter->fw_done); |
| rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); |
| if (rc) { |
| mutex_unlock(&adapter->fw_lock); |
| return rc; |
| } |
| |
| rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); |
| if (rc) { |
| dev_info(dev, |
| "Reset failed, long term map request timed out or aborted\n"); |
| mutex_unlock(&adapter->fw_lock); |
| return rc; |
| } |
| |
| if (adapter->fw_done_rc) { |
| dev_info(dev, |
| "Reset failed, attempting to free and reallocate buffer\n"); |
| free_long_term_buff(adapter, ltb); |
| mutex_unlock(&adapter->fw_lock); |
| return alloc_long_term_buff(adapter, ltb, ltb->size); |
| } |
| mutex_unlock(&adapter->fw_lock); |
| return 0; |
| } |
| |
| static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) |
| { |
| int i; |
| |
| for (i = 0; i < adapter->num_active_rx_pools; i++) |
| adapter->rx_pool[i].active = 0; |
| } |
| |
| static void replenish_rx_pool(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_rx_pool *pool) |
| { |
| int count = pool->size - atomic_read(&pool->available); |
| u64 handle = adapter->rx_scrq[pool->index]->handle; |
| 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; |
| int shift = 0; |
| int index; |
| int i; |
| |
| if (!pool->active) |
| return; |
| |
| 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, &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: |
| if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) |
| dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); |
| pool->free_map[pool->next_free] = index; |
| pool->rx_buff[index].skb = NULL; |
| |
| dev_kfree_skb_any(skb); |
| adapter->replenish_add_buff_failure++; |
| atomic_add(buffers_added, &pool->available); |
| |
| if (lpar_rc == H_CLOSED || adapter->failover_pending) { |
| /* Disable buffer pool replenishment and report carrier off if |
| * queue is closed or pending failover. |
| * Firmware guarantees that a signal will be sent to the |
| * driver, triggering a reset. |
| */ |
| deactivate_rx_pools(adapter); |
| netif_carrier_off(adapter->netdev); |
| } |
| } |
| |
| static void replenish_pools(struct ibmvnic_adapter *adapter) |
| { |
| int i; |
| |
| adapter->replenish_task_cycles++; |
| for (i = 0; i < adapter->num_active_rx_pools; i++) { |
| if (adapter->rx_pool[i].active) |
| replenish_rx_pool(adapter, &adapter->rx_pool[i]); |
| } |
| } |
| |
| static void release_stats_buffers(struct ibmvnic_adapter *adapter) |
| { |
| kfree(adapter->tx_stats_buffers); |
| kfree(adapter->rx_stats_buffers); |
| adapter->tx_stats_buffers = NULL; |
| adapter->rx_stats_buffers = NULL; |
| } |
| |
| static int init_stats_buffers(struct ibmvnic_adapter *adapter) |
| { |
| adapter->tx_stats_buffers = |
| kcalloc(IBMVNIC_MAX_QUEUES, |
| sizeof(struct ibmvnic_tx_queue_stats), |
| GFP_KERNEL); |
| if (!adapter->tx_stats_buffers) |
| return -ENOMEM; |
| |
| adapter->rx_stats_buffers = |
| kcalloc(IBMVNIC_MAX_QUEUES, |
| sizeof(struct ibmvnic_rx_queue_stats), |
| GFP_KERNEL); |
| if (!adapter->rx_stats_buffers) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static void release_stats_token(struct ibmvnic_adapter *adapter) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| |
| if (!adapter->stats_token) |
| return; |
| |
| dma_unmap_single(dev, adapter->stats_token, |
| sizeof(struct ibmvnic_statistics), |
| DMA_FROM_DEVICE); |
| adapter->stats_token = 0; |
| } |
| |
| static int init_stats_token(struct ibmvnic_adapter *adapter) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| dma_addr_t stok; |
| |
| stok = dma_map_single(dev, &adapter->stats, |
| sizeof(struct ibmvnic_statistics), |
| DMA_FROM_DEVICE); |
| if (dma_mapping_error(dev, stok)) { |
| dev_err(dev, "Couldn't map stats buffer\n"); |
| return -1; |
| } |
| |
| adapter->stats_token = stok; |
| netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); |
| return 0; |
| } |
| |
| static int reset_rx_pools(struct ibmvnic_adapter *adapter) |
| { |
| struct ibmvnic_rx_pool *rx_pool; |
| u64 buff_size; |
| int rx_scrqs; |
| int i, j, rc; |
| |
| if (!adapter->rx_pool) |
| return -1; |
| |
| buff_size = adapter->cur_rx_buf_sz; |
| rx_scrqs = adapter->num_active_rx_pools; |
| for (i = 0; i < rx_scrqs; i++) { |
| rx_pool = &adapter->rx_pool[i]; |
| |
| netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i); |
| |
| if (rx_pool->buff_size != buff_size) { |
| free_long_term_buff(adapter, &rx_pool->long_term_buff); |
| rx_pool->buff_size = buff_size; |
| rc = alloc_long_term_buff(adapter, |
| &rx_pool->long_term_buff, |
| rx_pool->size * |
| rx_pool->buff_size); |
| } else { |
| rc = reset_long_term_buff(adapter, |
| &rx_pool->long_term_buff); |
| } |
| |
| if (rc) |
| return rc; |
| |
| for (j = 0; j < rx_pool->size; j++) |
| rx_pool->free_map[j] = j; |
| |
| memset(rx_pool->rx_buff, 0, |
| rx_pool->size * sizeof(struct ibmvnic_rx_buff)); |
| |
| atomic_set(&rx_pool->available, 0); |
| rx_pool->next_alloc = 0; |
| rx_pool->next_free = 0; |
| rx_pool->active = 1; |
| } |
| |
| return 0; |
| } |
| |
| static void release_rx_pools(struct ibmvnic_adapter *adapter) |
| { |
| struct ibmvnic_rx_pool *rx_pool; |
| int i, j; |
| |
| if (!adapter->rx_pool) |
| return; |
| |
| for (i = 0; i < adapter->num_active_rx_pools; i++) { |
| rx_pool = &adapter->rx_pool[i]; |
| |
| netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); |
| |
| kfree(rx_pool->free_map); |
| free_long_term_buff(adapter, &rx_pool->long_term_buff); |
| |
| if (!rx_pool->rx_buff) |
| continue; |
| |
| for (j = 0; j < rx_pool->size; j++) { |
| if (rx_pool->rx_buff[j].skb) { |
| dev_kfree_skb_any(rx_pool->rx_buff[j].skb); |
| rx_pool->rx_buff[j].skb = NULL; |
| } |
| } |
| |
| kfree(rx_pool->rx_buff); |
| } |
| |
| kfree(adapter->rx_pool); |
| adapter->rx_pool = NULL; |
| adapter->num_active_rx_pools = 0; |
| } |
| |
| static int init_rx_pools(struct net_device *netdev) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| struct device *dev = &adapter->vdev->dev; |
| struct ibmvnic_rx_pool *rx_pool; |
| int rxadd_subcrqs; |
| u64 buff_size; |
| int i, j; |
| |
| rxadd_subcrqs = adapter->num_active_rx_scrqs; |
| buff_size = adapter->cur_rx_buf_sz; |
| |
| adapter->rx_pool = kcalloc(rxadd_subcrqs, |
| sizeof(struct ibmvnic_rx_pool), |
| GFP_KERNEL); |
| if (!adapter->rx_pool) { |
| dev_err(dev, "Failed to allocate rx pools\n"); |
| return -1; |
| } |
| |
| adapter->num_active_rx_pools = rxadd_subcrqs; |
| |
| for (i = 0; i < rxadd_subcrqs; i++) { |
| rx_pool = &adapter->rx_pool[i]; |
| |
| netdev_dbg(adapter->netdev, |
| "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", |
| i, adapter->req_rx_add_entries_per_subcrq, |
| buff_size); |
| |
| rx_pool->size = adapter->req_rx_add_entries_per_subcrq; |
| rx_pool->index = i; |
| rx_pool->buff_size = buff_size; |
| rx_pool->active = 1; |
| |
| rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), |
| GFP_KERNEL); |
| if (!rx_pool->free_map) { |
| release_rx_pools(adapter); |
| return -1; |
| } |
| |
| rx_pool->rx_buff = kcalloc(rx_pool->size, |
| sizeof(struct ibmvnic_rx_buff), |
| GFP_KERNEL); |
| if (!rx_pool->rx_buff) { |
| dev_err(dev, "Couldn't alloc rx buffers\n"); |
| release_rx_pools(adapter); |
| return -1; |
| } |
| |
| if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, |
| rx_pool->size * rx_pool->buff_size)) { |
| release_rx_pools(adapter); |
| return -1; |
| } |
| |
| for (j = 0; j < rx_pool->size; ++j) |
| rx_pool->free_map[j] = j; |
| |
| atomic_set(&rx_pool->available, 0); |
| rx_pool->next_alloc = 0; |
| rx_pool->next_free = 0; |
| } |
| |
| return 0; |
| } |
| |
| static int reset_one_tx_pool(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_tx_pool *tx_pool) |
| { |
| int rc, i; |
| |
| rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff); |
| if (rc) |
| return rc; |
| |
| memset(tx_pool->tx_buff, 0, |
| tx_pool->num_buffers * |
| sizeof(struct ibmvnic_tx_buff)); |
| |
| for (i = 0; i < tx_pool->num_buffers; i++) |
| tx_pool->free_map[i] = i; |
| |
| tx_pool->consumer_index = 0; |
| tx_pool->producer_index = 0; |
| |
| return 0; |
| } |
| |
| static int reset_tx_pools(struct ibmvnic_adapter *adapter) |
| { |
| int tx_scrqs; |
| int i, rc; |
| |
| if (!adapter->tx_pool) |
| return -1; |
| |
| tx_scrqs = adapter->num_active_tx_pools; |
| for (i = 0; i < tx_scrqs; i++) { |
| rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]); |
| if (rc) |
| return rc; |
| rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]); |
| if (rc) |
| return rc; |
| } |
| |
| return 0; |
| } |
| |
| static void release_vpd_data(struct ibmvnic_adapter *adapter) |
| { |
| if (!adapter->vpd) |
| return; |
| |
| kfree(adapter->vpd->buff); |
| kfree(adapter->vpd); |
| |
| adapter->vpd = NULL; |
| } |
| |
| static void release_one_tx_pool(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_tx_pool *tx_pool) |
| { |
| kfree(tx_pool->tx_buff); |
| kfree(tx_pool->free_map); |
| free_long_term_buff(adapter, &tx_pool->long_term_buff); |
| } |
| |
| static void release_tx_pools(struct ibmvnic_adapter *adapter) |
| { |
| int i; |
| |
| if (!adapter->tx_pool) |
| return; |
| |
| for (i = 0; i < adapter->num_active_tx_pools; i++) { |
| release_one_tx_pool(adapter, &adapter->tx_pool[i]); |
| release_one_tx_pool(adapter, &adapter->tso_pool[i]); |
| } |
| |
| kfree(adapter->tx_pool); |
| adapter->tx_pool = NULL; |
| kfree(adapter->tso_pool); |
| adapter->tso_pool = NULL; |
| adapter->num_active_tx_pools = 0; |
| } |
| |
| static int init_one_tx_pool(struct net_device *netdev, |
| struct ibmvnic_tx_pool *tx_pool, |
| int num_entries, int buf_size) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| int i; |
| |
| tx_pool->tx_buff = kcalloc(num_entries, |
| sizeof(struct ibmvnic_tx_buff), |
| GFP_KERNEL); |
| if (!tx_pool->tx_buff) |
| return -1; |
| |
| if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, |
| num_entries * buf_size)) |
| return -1; |
| |
| tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL); |
| if (!tx_pool->free_map) |
| return -1; |
| |
| for (i = 0; i < num_entries; i++) |
| tx_pool->free_map[i] = i; |
| |
| tx_pool->consumer_index = 0; |
| tx_pool->producer_index = 0; |
| tx_pool->num_buffers = num_entries; |
| tx_pool->buf_size = buf_size; |
| |
| return 0; |
| } |
| |
| static int init_tx_pools(struct net_device *netdev) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| int tx_subcrqs; |
| int i, rc; |
| |
| tx_subcrqs = adapter->num_active_tx_scrqs; |
| adapter->tx_pool = kcalloc(tx_subcrqs, |
| sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); |
| if (!adapter->tx_pool) |
| return -1; |
| |
| adapter->tso_pool = kcalloc(tx_subcrqs, |
| sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); |
| if (!adapter->tso_pool) |
| return -1; |
| |
| adapter->num_active_tx_pools = tx_subcrqs; |
| |
| for (i = 0; i < tx_subcrqs; i++) { |
| rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], |
| adapter->req_tx_entries_per_subcrq, |
| adapter->req_mtu + VLAN_HLEN); |
| if (rc) { |
| release_tx_pools(adapter); |
| return rc; |
| } |
| |
| rc = init_one_tx_pool(netdev, &adapter->tso_pool[i], |
| IBMVNIC_TSO_BUFS, |
| IBMVNIC_TSO_BUF_SZ); |
| if (rc) { |
| release_tx_pools(adapter); |
| return rc; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) |
| { |
| int i; |
| |
| if (adapter->napi_enabled) |
| return; |
| |
| for (i = 0; i < adapter->req_rx_queues; i++) |
| napi_enable(&adapter->napi[i]); |
| |
| adapter->napi_enabled = true; |
| } |
| |
| static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) |
| { |
| int i; |
| |
| if (!adapter->napi_enabled) |
| return; |
| |
| for (i = 0; i < adapter->req_rx_queues; i++) { |
| netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); |
| napi_disable(&adapter->napi[i]); |
| } |
| |
| adapter->napi_enabled = false; |
| } |
| |
| static int init_napi(struct ibmvnic_adapter *adapter) |
| { |
| int i; |
| |
| adapter->napi = kcalloc(adapter->req_rx_queues, |
| sizeof(struct napi_struct), GFP_KERNEL); |
| if (!adapter->napi) |
| return -ENOMEM; |
| |
| for (i = 0; i < adapter->req_rx_queues; i++) { |
| netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); |
| netif_napi_add(adapter->netdev, &adapter->napi[i], |
| ibmvnic_poll, NAPI_POLL_WEIGHT); |
| } |
| |
| adapter->num_active_rx_napi = adapter->req_rx_queues; |
| return 0; |
| } |
| |
| static void release_napi(struct ibmvnic_adapter *adapter) |
| { |
| int i; |
| |
| if (!adapter->napi) |
| return; |
| |
| for (i = 0; i < adapter->num_active_rx_napi; i++) { |
| netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); |
| netif_napi_del(&adapter->napi[i]); |
| } |
| |
| kfree(adapter->napi); |
| adapter->napi = NULL; |
| adapter->num_active_rx_napi = 0; |
| adapter->napi_enabled = false; |
| } |
| |
| static int ibmvnic_login(struct net_device *netdev) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| unsigned long timeout = msecs_to_jiffies(30000); |
| int retry_count = 0; |
| int retries = 10; |
| bool retry; |
| int rc; |
| |
| do { |
| retry = false; |
| if (retry_count > retries) { |
| netdev_warn(netdev, "Login attempts exceeded\n"); |
| return -1; |
| } |
| |
| adapter->init_done_rc = 0; |
| reinit_completion(&adapter->init_done); |
| rc = send_login(adapter); |
| if (rc) { |
| netdev_warn(netdev, "Unable to login\n"); |
| return rc; |
| } |
| |
| if (!wait_for_completion_timeout(&adapter->init_done, |
| timeout)) { |
| netdev_warn(netdev, "Login timed out, retrying...\n"); |
| retry = true; |
| adapter->init_done_rc = 0; |
| retry_count++; |
| continue; |
| } |
| |
| if (adapter->init_done_rc == ABORTED) { |
| netdev_warn(netdev, "Login aborted, retrying...\n"); |
| retry = true; |
| adapter->init_done_rc = 0; |
| retry_count++; |
| /* FW or device may be busy, so |
| * wait a bit before retrying login |
| */ |
| msleep(500); |
| } else if (adapter->init_done_rc == PARTIALSUCCESS) { |
| retry_count++; |
| release_sub_crqs(adapter, 1); |
| |
| retry = true; |
| netdev_dbg(netdev, |
| "Received partial success, retrying...\n"); |
| adapter->init_done_rc = 0; |
| reinit_completion(&adapter->init_done); |
| send_query_cap(adapter); |
| if (!wait_for_completion_timeout(&adapter->init_done, |
| timeout)) { |
| netdev_warn(netdev, |
| "Capabilities query timed out\n"); |
| return -1; |
| } |
| |
| rc = init_sub_crqs(adapter); |
| if (rc) { |
| netdev_warn(netdev, |
| "SCRQ initialization failed\n"); |
| return -1; |
| } |
| |
| rc = init_sub_crq_irqs(adapter); |
| if (rc) { |
| netdev_warn(netdev, |
| "SCRQ irq initialization failed\n"); |
| return -1; |
| } |
| } else if (adapter->init_done_rc) { |
| netdev_warn(netdev, "Adapter login failed\n"); |
| return -1; |
| } |
| } while (retry); |
| |
| __ibmvnic_set_mac(netdev, adapter->mac_addr); |
| |
| return 0; |
| } |
| |
| static void release_login_buffer(struct ibmvnic_adapter *adapter) |
| { |
| kfree(adapter->login_buf); |
| adapter->login_buf = NULL; |
| } |
| |
| static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) |
| { |
| kfree(adapter->login_rsp_buf); |
| adapter->login_rsp_buf = NULL; |
| } |
| |
| static void release_resources(struct ibmvnic_adapter *adapter) |
| { |
| release_vpd_data(adapter); |
| |
| release_tx_pools(adapter); |
| release_rx_pools(adapter); |
| |
| release_napi(adapter); |
| release_login_rsp_buffer(adapter); |
| } |
| |
| static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) |
| { |
| struct net_device *netdev = adapter->netdev; |
| unsigned long timeout = msecs_to_jiffies(30000); |
| union ibmvnic_crq crq; |
| bool resend; |
| int rc; |
| |
| netdev_dbg(netdev, "setting link state %d\n", link_state); |
| |
| 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 = link_state; |
| |
| do { |
| resend = false; |
| |
| reinit_completion(&adapter->init_done); |
| rc = ibmvnic_send_crq(adapter, &crq); |
| if (rc) { |
| netdev_err(netdev, "Failed to set link state\n"); |
| return rc; |
| } |
| |
| if (!wait_for_completion_timeout(&adapter->init_done, |
| timeout)) { |
| netdev_err(netdev, "timeout setting link state\n"); |
| return -1; |
| } |
| |
| if (adapter->init_done_rc == PARTIALSUCCESS) { |
| /* Partuial success, delay and re-send */ |
| mdelay(1000); |
| resend = true; |
| } else if (adapter->init_done_rc) { |
| netdev_warn(netdev, "Unable to set link state, rc=%d\n", |
| adapter->init_done_rc); |
| return adapter->init_done_rc; |
| } |
| } while (resend); |
| |
| return 0; |
| } |
| |
| static int set_real_num_queues(struct net_device *netdev) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| int rc; |
| |
| netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", |
| adapter->req_tx_queues, adapter->req_rx_queues); |
| |
| rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); |
| if (rc) { |
| netdev_err(netdev, "failed to set the number of tx queues\n"); |
| return rc; |
| } |
| |
| rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); |
| if (rc) |
| netdev_err(netdev, "failed to set the number of rx queues\n"); |
| |
| return rc; |
| } |
| |
| static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| union ibmvnic_crq crq; |
| int len = 0; |
| int rc; |
| |
| if (adapter->vpd->buff) |
| len = adapter->vpd->len; |
| |
| mutex_lock(&adapter->fw_lock); |
| adapter->fw_done_rc = 0; |
| reinit_completion(&adapter->fw_done); |
| |
| crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; |
| crq.get_vpd_size.cmd = GET_VPD_SIZE; |
| rc = ibmvnic_send_crq(adapter, &crq); |
| if (rc) { |
| mutex_unlock(&adapter->fw_lock); |
| return rc; |
| } |
| |
| rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); |
| if (rc) { |
| dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); |
| mutex_unlock(&adapter->fw_lock); |
| return rc; |
| } |
| mutex_unlock(&adapter->fw_lock); |
| |
| if (!adapter->vpd->len) |
| return -ENODATA; |
| |
| if (!adapter->vpd->buff) |
| adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); |
| else if (adapter->vpd->len != len) |
| adapter->vpd->buff = |
| krealloc(adapter->vpd->buff, |
| adapter->vpd->len, GFP_KERNEL); |
| |
| if (!adapter->vpd->buff) { |
| dev_err(dev, "Could allocate VPD buffer\n"); |
| return -ENOMEM; |
| } |
| |
| adapter->vpd->dma_addr = |
| dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, |
| DMA_FROM_DEVICE); |
| if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { |
| dev_err(dev, "Could not map VPD buffer\n"); |
| kfree(adapter->vpd->buff); |
| adapter->vpd->buff = NULL; |
| return -ENOMEM; |
| } |
| |
| mutex_lock(&adapter->fw_lock); |
| adapter->fw_done_rc = 0; |
| reinit_completion(&adapter->fw_done); |
| |
| crq.get_vpd.first = IBMVNIC_CRQ_CMD; |
| crq.get_vpd.cmd = GET_VPD; |
| crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); |
| crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); |
| rc = ibmvnic_send_crq(adapter, &crq); |
| if (rc) { |
| kfree(adapter->vpd->buff); |
| adapter->vpd->buff = NULL; |
| mutex_unlock(&adapter->fw_lock); |
| return rc; |
| } |
| |
| rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); |
| if (rc) { |
| dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); |
| kfree(adapter->vpd->buff); |
| adapter->vpd->buff = NULL; |
| mutex_unlock(&adapter->fw_lock); |
| return rc; |
| } |
| |
| mutex_unlock(&adapter->fw_lock); |
| return 0; |
| } |
| |
| static int init_resources(struct ibmvnic_adapter *adapter) |
| { |
| struct net_device *netdev = adapter->netdev; |
| int rc; |
| |
| rc = set_real_num_queues(netdev); |
| if (rc) |
| return rc; |
| |
| adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); |
| if (!adapter->vpd) |
| return -ENOMEM; |
| |
| /* Vital Product Data (VPD) */ |
| rc = ibmvnic_get_vpd(adapter); |
| if (rc) { |
| netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); |
| return rc; |
| } |
| |
| adapter->map_id = 1; |
| |
| rc = init_napi(adapter); |
| if (rc) |
| return rc; |
| |
| send_query_map(adapter); |
| |
| rc = init_rx_pools(netdev); |
| if (rc) |
| return rc; |
| |
| rc = init_tx_pools(netdev); |
| return rc; |
| } |
| |
| static int __ibmvnic_open(struct net_device *netdev) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| enum vnic_state prev_state = adapter->state; |
| int i, rc; |
| |
| adapter->state = VNIC_OPENING; |
| replenish_pools(adapter); |
| ibmvnic_napi_enable(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++) { |
| netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); |
| if (prev_state == VNIC_CLOSED) |
| enable_irq(adapter->rx_scrq[i]->irq); |
| enable_scrq_irq(adapter, adapter->rx_scrq[i]); |
| } |
| |
| for (i = 0; i < adapter->req_tx_queues; i++) { |
| netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); |
| if (prev_state == VNIC_CLOSED) |
| enable_irq(adapter->tx_scrq[i]->irq); |
| enable_scrq_irq(adapter, adapter->tx_scrq[i]); |
| } |
| |
| rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); |
| if (rc) { |
| for (i = 0; i < adapter->req_rx_queues; i++) |
| napi_disable(&adapter->napi[i]); |
| release_resources(adapter); |
| return rc; |
| } |
| |
| netif_tx_start_all_queues(netdev); |
| |
| if (prev_state == VNIC_CLOSED) { |
| for (i = 0; i < adapter->req_rx_queues; i++) |
| napi_schedule(&adapter->napi[i]); |
| } |
| |
| adapter->state = VNIC_OPEN; |
| return rc; |
| } |
| |
| static int ibmvnic_open(struct net_device *netdev) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| int rc; |
| |
| /* If device failover is pending, just set device state and return. |
| * Device operation will be handled by reset routine. |
| */ |
| if (adapter->failover_pending) { |
| adapter->state = VNIC_OPEN; |
| return 0; |
| } |
| |
| if (adapter->state != VNIC_CLOSED) { |
| rc = ibmvnic_login(netdev); |
| if (rc) |
| return rc; |
| |
| rc = init_resources(adapter); |
| if (rc) { |
| netdev_err(netdev, "failed to initialize resources\n"); |
| release_resources(adapter); |
| return rc; |
| } |
| } |
| |
| rc = __ibmvnic_open(netdev); |
| |
| return rc; |
| } |
| |
| static void clean_rx_pools(struct ibmvnic_adapter *adapter) |
| { |
| struct ibmvnic_rx_pool *rx_pool; |
| struct ibmvnic_rx_buff *rx_buff; |
| u64 rx_entries; |
| int rx_scrqs; |
| int i, j; |
| |
| if (!adapter->rx_pool) |
| return; |
| |
| rx_scrqs = adapter->num_active_rx_pools; |
| rx_entries = adapter->req_rx_add_entries_per_subcrq; |
| |
| /* Free any remaining skbs in the rx buffer pools */ |
| for (i = 0; i < rx_scrqs; i++) { |
| rx_pool = &adapter->rx_pool[i]; |
| if (!rx_pool || !rx_pool->rx_buff) |
| continue; |
| |
| netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); |
| for (j = 0; j < rx_entries; j++) { |
| rx_buff = &rx_pool->rx_buff[j]; |
| if (rx_buff && rx_buff->skb) { |
| dev_kfree_skb_any(rx_buff->skb); |
| rx_buff->skb = NULL; |
| } |
| } |
| } |
| } |
| |
| static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_tx_pool *tx_pool) |
| { |
| struct ibmvnic_tx_buff *tx_buff; |
| u64 tx_entries; |
| int i; |
| |
| if (!tx_pool || !tx_pool->tx_buff) |
| return; |
| |
| tx_entries = tx_pool->num_buffers; |
| |
| for (i = 0; i < tx_entries; i++) { |
| tx_buff = &tx_pool->tx_buff[i]; |
| if (tx_buff && tx_buff->skb) { |
| dev_kfree_skb_any(tx_buff->skb); |
| tx_buff->skb = NULL; |
| } |
| } |
| } |
| |
| static void clean_tx_pools(struct ibmvnic_adapter *adapter) |
| { |
| int tx_scrqs; |
| int i; |
| |
| if (!adapter->tx_pool || !adapter->tso_pool) |
| return; |
| |
| tx_scrqs = adapter->num_active_tx_pools; |
| |
| /* Free any remaining skbs in the tx buffer pools */ |
| for (i = 0; i < tx_scrqs; i++) { |
| netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); |
| clean_one_tx_pool(adapter, &adapter->tx_pool[i]); |
| clean_one_tx_pool(adapter, &adapter->tso_pool[i]); |
| } |
| } |
| |
| static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) |
| { |
| struct net_device *netdev = adapter->netdev; |
| int i; |
| |
| if (adapter->tx_scrq) { |
| for (i = 0; i < adapter->req_tx_queues; i++) |
| if (adapter->tx_scrq[i]->irq) { |
| netdev_dbg(netdev, |
| "Disabling tx_scrq[%d] irq\n", i); |
| disable_scrq_irq(adapter, adapter->tx_scrq[i]); |
| disable_irq(adapter->tx_scrq[i]->irq); |
| } |
| } |
| |
| if (adapter->rx_scrq) { |
| for (i = 0; i < adapter->req_rx_queues; i++) { |
| if (adapter->rx_scrq[i]->irq) { |
| netdev_dbg(netdev, |
| "Disabling rx_scrq[%d] irq\n", i); |
| disable_scrq_irq(adapter, adapter->rx_scrq[i]); |
| disable_irq(adapter->rx_scrq[i]->irq); |
| } |
| } |
| } |
| } |
| |
| static void ibmvnic_cleanup(struct net_device *netdev) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| |
| /* ensure that transmissions are stopped if called by do_reset */ |
| if (test_bit(0, &adapter->resetting)) |
| netif_tx_disable(netdev); |
| else |
| netif_tx_stop_all_queues(netdev); |
| |
| ibmvnic_napi_disable(adapter); |
| ibmvnic_disable_irqs(adapter); |
| |
| clean_rx_pools(adapter); |
| clean_tx_pools(adapter); |
| } |
| |
| static int __ibmvnic_close(struct net_device *netdev) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| int rc = 0; |
| |
| adapter->state = VNIC_CLOSING; |
| rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); |
| if (rc) |
| return rc; |
| adapter->state = VNIC_CLOSED; |
| return 0; |
| } |
| |
| static int ibmvnic_close(struct net_device *netdev) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| int rc; |
| |
| /* If device failover is pending, just set device state and return. |
| * Device operation will be handled by reset routine. |
| */ |
| if (adapter->failover_pending) { |
| adapter->state = VNIC_CLOSED; |
| return 0; |
| } |
| |
| rc = __ibmvnic_close(netdev); |
| ibmvnic_cleanup(netdev); |
| |
| return rc; |
| } |
| |
| /** |
| * 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; |
| |
| if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) |
| hdr_len[0] = sizeof(struct vlan_ethhdr); |
| else |
| 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); |
| } else if (skb->protocol == htons(ETH_P_ARP)) { |
| hdr_len[1] = arp_hdr_len(skb->dev); |
| hdr_len[2] = 0; |
| } |
| |
| 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 int 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; |
| int num_descs = 0; |
| 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++; |
| num_descs++; |
| } |
| |
| return num_descs; |
| } |
| |
| /** |
| * 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; |
| u8 *hdr_data = txbuff->hdr_data; |
| |
| tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, |
| txbuff->hdr_data); |
| *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, |
| txbuff->indir_arr + 1); |
| } |
| |
| static int ibmvnic_xmit_workarounds(struct sk_buff *skb, |
| struct net_device *netdev) |
| { |
| /* For some backing devices, mishandling of small packets |
| * can result in a loss of connection or TX stall. Device |
| * architects recommend that no packet should be smaller |
| * than the minimum MTU value provided to the driver, so |
| * pad any packets to that length |
| */ |
| if (skb->len < netdev->min_mtu) |
| return skb_put_padto(skb, netdev->min_mtu); |
| |
| return 0; |
| } |
| |
| static netdev_tx_t 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_sub_crq_queue *tx_scrq; |
| 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; |
| unsigned long lpar_rc; |
| union sub_crq tx_crq; |
| unsigned int offset; |
| int num_entries = 1; |
| unsigned char *dst; |
| int index = 0; |
| u8 proto = 0; |
| u64 handle; |
| netdev_tx_t ret = NETDEV_TX_OK; |
| |
| if (test_bit(0, &adapter->resetting)) { |
| if (!netif_subqueue_stopped(netdev, skb)) |
| netif_stop_subqueue(netdev, queue_num); |
| dev_kfree_skb_any(skb); |
| |
| tx_send_failed++; |
| tx_dropped++; |
| ret = NETDEV_TX_OK; |
| goto out; |
| } |
| |
| if (ibmvnic_xmit_workarounds(skb, netdev)) { |
| tx_dropped++; |
| tx_send_failed++; |
| ret = NETDEV_TX_OK; |
| goto out; |
| } |
| if (skb_is_gso(skb)) |
| tx_pool = &adapter->tso_pool[queue_num]; |
| else |
| tx_pool = &adapter->tx_pool[queue_num]; |
| |
| tx_scrq = adapter->tx_scrq[queue_num]; |
| txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); |
| handle = tx_scrq->handle; |
| |
| index = tx_pool->free_map[tx_pool->consumer_index]; |
| |
| if (index == IBMVNIC_INVALID_MAP) { |
| dev_kfree_skb_any(skb); |
| tx_send_failed++; |
| tx_dropped++; |
| ret = NETDEV_TX_OK; |
| goto out; |
| } |
| |
| tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; |
| |
| offset = index * tx_pool->buf_size; |
| dst = tx_pool->long_term_buff.buff + offset; |
| memset(dst, 0, tx_pool->buf_size); |
| data_dma_addr = tx_pool->long_term_buff.addr + offset; |
| |
| if (skb_shinfo(skb)->nr_frags) { |
| int cur, i; |
| |
| /* Copy the head */ |
| skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); |
| cur = skb_headlen(skb); |
| |
| /* Copy the frags */ |
| for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { |
| const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
| |
| memcpy(dst + cur, |
| page_address(skb_frag_page(frag)) + |
| skb_frag_off(frag), skb_frag_size(frag)); |
| cur += skb_frag_size(frag); |
| } |
| } else { |
| skb_copy_from_linear_data(skb, dst, skb->len); |
| } |
| |
| tx_pool->consumer_index = |
| (tx_pool->consumer_index + 1) % tx_pool->num_buffers; |
| |
| 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; |
| |
| 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; |
| |
| if (skb_is_gso(skb)) |
| tx_crq.v1.correlator = |
| cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); |
| else |
| 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 && skb_vlan_tag_present(skb)) { |
| 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)) { |
| tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; |
| proto = ip_hdr(skb)->protocol; |
| } else if (skb->protocol == htons(ETH_P_IPV6)) { |
| tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; |
| proto = ipv6_hdr(skb)->nexthdr; |
| } |
| |
| if (proto == IPPROTO_TCP) |
| tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; |
| else if (proto == IPPROTO_UDP) |
| tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; |
| |
| if (skb->ip_summed == CHECKSUM_PARTIAL) { |
| tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; |
| hdrs += 2; |
| } |
| if (skb_is_gso(skb)) { |
| tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; |
| tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); |
| hdrs += 2; |
| } |
| /* determine if l2/3/4 headers are sent to firmware */ |
| if ((*hdrs >> 7) & 1) { |
| build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); |
| tx_crq.v1.n_crq_elem = num_entries; |
| tx_buff->num_entries = 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)) { |
| dev_kfree_skb_any(skb); |
| tx_buff->skb = NULL; |
| 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_OK; |
| goto tx_err_out; |
| } |
| lpar_rc = send_subcrq_indirect(adapter, handle, |
| (u64)tx_buff->indir_dma, |
| (u64)num_entries); |
| dma_unmap_single(dev, tx_buff->indir_dma, |
| sizeof(tx_buff->indir_arr), DMA_TO_DEVICE); |
| } else { |
| tx_buff->num_entries = num_entries; |
| lpar_rc = send_subcrq(adapter, handle, |
| &tx_crq); |
| } |
| if (lpar_rc != H_SUCCESS) { |
| if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) |
| dev_err_ratelimited(dev, "tx: send failed\n"); |
| dev_kfree_skb_any(skb); |
| tx_buff->skb = NULL; |
| |
| if (lpar_rc == H_CLOSED || adapter->failover_pending) { |
| /* Disable TX and report carrier off if queue is closed |
| * or pending failover. |
| * Firmware guarantees that a signal will be sent to the |
| * driver, triggering a reset or some other action. |
| */ |
| netif_tx_stop_all_queues(netdev); |
| netif_carrier_off(netdev); |
| } |
| |
| tx_send_failed++; |
| tx_dropped++; |
| ret = NETDEV_TX_OK; |
| goto tx_err_out; |
| } |
| |
| if (atomic_add_return(num_entries, &tx_scrq->used) |
| >= adapter->req_tx_entries_per_subcrq) { |
| netdev_dbg(netdev, "Stopping queue %d\n", queue_num); |
| netif_stop_subqueue(netdev, queue_num); |
| } |
| |
| tx_packets++; |
| tx_bytes += skb->len; |
| txq->trans_start = jiffies; |
| ret = NETDEV_TX_OK; |
| goto out; |
| |
| tx_err_out: |
| /* roll back consumer index and map array*/ |
| if (tx_pool->consumer_index == 0) |
| tx_pool->consumer_index = |
| tx_pool->num_buffers - 1; |
| else |
| tx_pool->consumer_index--; |
| tx_pool->free_map[tx_pool->consumer_index] = index; |
| 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; |
| adapter->tx_stats_buffers[queue_num].packets += tx_packets; |
| adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; |
| adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; |
| |
| 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, u8 *dev_addr) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| union ibmvnic_crq crq; |
| int rc; |
| |
| if (!is_valid_ether_addr(dev_addr)) { |
| rc = -EADDRNOTAVAIL; |
| goto err; |
| } |
| |
| 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], dev_addr); |
| |
| mutex_lock(&adapter->fw_lock); |
| adapter->fw_done_rc = 0; |
| reinit_completion(&adapter->fw_done); |
| |
| rc = ibmvnic_send_crq(adapter, &crq); |
| if (rc) { |
| rc = -EIO; |
| mutex_unlock(&adapter->fw_lock); |
| goto err; |
| } |
| |
| rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); |
| /* netdev->dev_addr is changed in handle_change_mac_rsp function */ |
| if (rc || adapter->fw_done_rc) { |
| rc = -EIO; |
| mutex_unlock(&adapter->fw_lock); |
| goto err; |
| } |
| mutex_unlock(&adapter->fw_lock); |
| return 0; |
| err: |
| ether_addr_copy(adapter->mac_addr, netdev->dev_addr); |
| return rc; |
| } |
| |
| static int ibmvnic_set_mac(struct net_device *netdev, void *p) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| struct sockaddr *addr = p; |
| int rc; |
| |
| rc = 0; |
| ether_addr_copy(adapter->mac_addr, addr->sa_data); |
| if (adapter->state != VNIC_PROBED) |
| rc = __ibmvnic_set_mac(netdev, addr->sa_data); |
| |
| return rc; |
| } |
| |
| /** |
| * do_change_param_reset returns zero if we are able to keep processing reset |
| * events, or non-zero if we hit a fatal error and must halt. |
| */ |
| static int do_change_param_reset(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_rwi *rwi, |
| u32 reset_state) |
| { |
| struct net_device *netdev = adapter->netdev; |
| int i, rc; |
| |
| netdev_dbg(adapter->netdev, "Change param resetting driver (%d)\n", |
| rwi->reset_reason); |
| |
| netif_carrier_off(netdev); |
| adapter->reset_reason = rwi->reset_reason; |
| |
| ibmvnic_cleanup(netdev); |
| |
| if (reset_state == VNIC_OPEN) { |
| rc = __ibmvnic_close(netdev); |
| if (rc) |
| return rc; |
| } |
| |
| release_resources(adapter); |
| release_sub_crqs(adapter, 1); |
| release_crq_queue(adapter); |
| |
| adapter->state = VNIC_PROBED; |
| |
| rc = init_crq_queue(adapter); |
| |
| if (rc) { |
| netdev_err(adapter->netdev, |
| "Couldn't initialize crq. rc=%d\n", rc); |
| return rc; |
| } |
| |
| rc = ibmvnic_reset_init(adapter, true); |
| if (rc) |
| return IBMVNIC_INIT_FAILED; |
| |
| /* If the adapter was in PROBE state prior to the reset, |
| * exit here. |
| */ |
| if (reset_state == VNIC_PROBED) |
| return 0; |
| |
| rc = ibmvnic_login(netdev); |
| if (rc) { |
| adapter->state = reset_state; |
| return rc; |
| } |
| |
| rc = init_resources(adapter); |
| if (rc) |
| return rc; |
| |
| ibmvnic_disable_irqs(adapter); |
| |
| adapter->state = VNIC_CLOSED; |
| |
| if (reset_state == VNIC_CLOSED) |
| return 0; |
| |
| rc = __ibmvnic_open(netdev); |
| if (rc) |
| return IBMVNIC_OPEN_FAILED; |
| |
| /* refresh device's multicast list */ |
| ibmvnic_set_multi(netdev); |
| |
| /* kick napi */ |
| for (i = 0; i < adapter->req_rx_queues; i++) |
| napi_schedule(&adapter->napi[i]); |
| |
| return 0; |
| } |
| |
| /** |
| * do_reset returns zero if we are able to keep processing reset events, or |
| * non-zero if we hit a fatal error and must halt. |
| */ |
| static int do_reset(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_rwi *rwi, u32 reset_state) |
| { |
| u64 old_num_rx_queues, old_num_tx_queues; |
| u64 old_num_rx_slots, old_num_tx_slots; |
| struct net_device *netdev = adapter->netdev; |
| int i, rc; |
| |
| netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", |
| rwi->reset_reason); |
| |
| rtnl_lock(); |
| |
| netif_carrier_off(netdev); |
| adapter->reset_reason = rwi->reset_reason; |
| |
| old_num_rx_queues = adapter->req_rx_queues; |
| old_num_tx_queues = adapter->req_tx_queues; |
| old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; |
| old_num_tx_slots = adapter->req_tx_entries_per_subcrq; |
| |
| ibmvnic_cleanup(netdev); |
| |
| if (reset_state == VNIC_OPEN && |
| adapter->reset_reason != VNIC_RESET_MOBILITY && |
| adapter->reset_reason != VNIC_RESET_FAILOVER) { |
| adapter->state = VNIC_CLOSING; |
| |
| /* Release the RTNL lock before link state change and |
| * re-acquire after the link state change to allow |
| * linkwatch_event to grab the RTNL lock and run during |
| * a reset. |
| */ |
| rtnl_unlock(); |
| rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); |
| rtnl_lock(); |
| if (rc) |
| goto out; |
| |
| if (adapter->state != VNIC_CLOSING) { |
| rc = -1; |
| goto out; |
| } |
| |
| adapter->state = VNIC_CLOSED; |
| } |
| |
| if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { |
| /* remove the closed state so when we call open it appears |
| * we are coming from the probed state. |
| */ |
| adapter->state = VNIC_PROBED; |
| |
| if (adapter->reset_reason == VNIC_RESET_MOBILITY) { |
| rc = ibmvnic_reenable_crq_queue(adapter); |
| release_sub_crqs(adapter, 1); |
| } else { |
| rc = ibmvnic_reset_crq(adapter); |
| if (rc == H_CLOSED || rc == H_SUCCESS) { |
| rc = vio_enable_interrupts(adapter->vdev); |
| if (rc) |
| netdev_err(adapter->netdev, |
| "Reset failed to enable interrupts. rc=%d\n", |
| rc); |
| } |
| } |
| |
| if (rc) { |
| netdev_err(adapter->netdev, |
| "Reset couldn't initialize crq. rc=%d\n", rc); |
| goto out; |
| } |
| |
| rc = ibmvnic_reset_init(adapter, true); |
| if (rc) { |
| rc = IBMVNIC_INIT_FAILED; |
| goto out; |
| } |
| |
| /* If the adapter was in PROBE state prior to the reset, |
| * exit here. |
| */ |
| if (reset_state == VNIC_PROBED) { |
| rc = 0; |
| goto out; |
| } |
| |
| rc = ibmvnic_login(netdev); |
| if (rc) { |
| adapter->state = reset_state; |
| goto out; |
| } |
| |
| if (adapter->req_rx_queues != old_num_rx_queues || |
| adapter->req_tx_queues != old_num_tx_queues || |
| adapter->req_rx_add_entries_per_subcrq != |
| old_num_rx_slots || |
| adapter->req_tx_entries_per_subcrq != |
| old_num_tx_slots || |
| !adapter->rx_pool || |
| !adapter->tso_pool || |
| !adapter->tx_pool) { |
| release_rx_pools(adapter); |
| release_tx_pools(adapter); |
| release_napi(adapter); |
| release_vpd_data(adapter); |
| |
| rc = init_resources(adapter); |
| if (rc) |
| goto out; |
| |
| } else { |
| rc = reset_tx_pools(adapter); |
| if (rc) { |
| netdev_dbg(adapter->netdev, "reset tx pools failed (%d)\n", |
| rc); |
| goto out; |
| } |
| |
| rc = reset_rx_pools(adapter); |
| if (rc) { |
| netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n", |
| rc); |
| goto out; |
| } |
| } |
| ibmvnic_disable_irqs(adapter); |
| } |
| adapter->state = VNIC_CLOSED; |
| |
| if (reset_state == VNIC_CLOSED) { |
| rc = 0; |
| goto out; |
| } |
| |
| rc = __ibmvnic_open(netdev); |
| if (rc) { |
| rc = IBMVNIC_OPEN_FAILED; |
| goto out; |
| } |
| |
| /* refresh device's multicast list */ |
| ibmvnic_set_multi(netdev); |
| |
| /* kick napi */ |
| for (i = 0; i < adapter->req_rx_queues; i++) |
| napi_schedule(&adapter->napi[i]); |
| |
| if (adapter->reset_reason != VNIC_RESET_FAILOVER) |
| call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev); |
| |
| rc = 0; |
| |
| out: |
| rtnl_unlock(); |
| |
| return rc; |
| } |
| |
| static int do_hard_reset(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_rwi *rwi, u32 reset_state) |
| { |
| struct net_device *netdev = adapter->netdev; |
| int rc; |
| |
| netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n", |
| rwi->reset_reason); |
| |
| netif_carrier_off(netdev); |
| adapter->reset_reason = rwi->reset_reason; |
| |
| ibmvnic_cleanup(netdev); |
| release_resources(adapter); |
| release_sub_crqs(adapter, 0); |
| release_crq_queue(adapter); |
| |
| /* remove the closed state so when we call open it appears |
| * we are coming from the probed state. |
| */ |
| adapter->state = VNIC_PROBED; |
| |
| reinit_completion(&adapter->init_done); |
| rc = init_crq_queue(adapter); |
| if (rc) { |
| netdev_err(adapter->netdev, |
| "Couldn't initialize crq. rc=%d\n", rc); |
| return rc; |
| } |
| |
| rc = ibmvnic_reset_init(adapter, false); |
| if (rc) |
| return rc; |
| |
| /* If the adapter was in PROBE state prior to the reset, |
| * exit here. |
| */ |
| if (reset_state == VNIC_PROBED) |
| return 0; |
| |
| rc = ibmvnic_login(netdev); |
| if (rc) { |
| adapter->state = VNIC_PROBED; |
| return 0; |
| } |
| |
| rc = init_resources(adapter); |
| if (rc) |
| return rc; |
| |
| ibmvnic_disable_irqs(adapter); |
| adapter->state = VNIC_CLOSED; |
| |
| if (reset_state == VNIC_CLOSED) |
| return 0; |
| |
| rc = __ibmvnic_open(netdev); |
| if (rc) |
| return IBMVNIC_OPEN_FAILED; |
| |
| return 0; |
| } |
| |
| static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) |
| { |
| struct ibmvnic_rwi *rwi; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&adapter->rwi_lock, flags); |
| |
| if (!list_empty(&adapter->rwi_list)) { |
| rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, |
| list); |
| list_del(&rwi->list); |
| } else { |
| rwi = NULL; |
| } |
| |
| spin_unlock_irqrestore(&adapter->rwi_lock, flags); |
| return rwi; |
| } |
| |
| static void free_all_rwi(struct ibmvnic_adapter *adapter) |
| { |
| struct ibmvnic_rwi *rwi; |
| |
| rwi = get_next_rwi(adapter); |
| while (rwi) { |
| kfree(rwi); |
| rwi = get_next_rwi(adapter); |
| } |
| } |
| |
| static void __ibmvnic_reset(struct work_struct *work) |
| { |
| struct ibmvnic_rwi *rwi; |
| struct ibmvnic_adapter *adapter; |
| bool saved_state = false; |
| unsigned long flags; |
| u32 reset_state; |
| int rc = 0; |
| |
| adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); |
| |
| if (test_and_set_bit_lock(0, &adapter->resetting)) { |
| schedule_delayed_work(&adapter->ibmvnic_delayed_reset, |
| IBMVNIC_RESET_DELAY); |
| return; |
| } |
| |
| rwi = get_next_rwi(adapter); |
| while (rwi) { |
| spin_lock_irqsave(&adapter->state_lock, flags); |
| |
| if (adapter->state == VNIC_REMOVING || |
| adapter->state == VNIC_REMOVED) { |
| spin_unlock_irqrestore(&adapter->state_lock, flags); |
| kfree(rwi); |
| rc = EBUSY; |
| break; |
| } |
| |
| if (!saved_state) { |
| reset_state = adapter->state; |
| adapter->state = VNIC_RESETTING; |
| saved_state = true; |
| } |
| spin_unlock_irqrestore(&adapter->state_lock, flags); |
| |
| if (rwi->reset_reason == VNIC_RESET_CHANGE_PARAM) { |
| /* CHANGE_PARAM requestor holds rtnl_lock */ |
| rc = do_change_param_reset(adapter, rwi, reset_state); |
| } else if (adapter->force_reset_recovery) { |
| /* Transport event occurred during previous reset */ |
| if (adapter->wait_for_reset) { |
| /* Previous was CHANGE_PARAM; caller locked */ |
| adapter->force_reset_recovery = false; |
| rc = do_hard_reset(adapter, rwi, reset_state); |
| } else { |
| rtnl_lock(); |
| adapter->force_reset_recovery = false; |
| rc = do_hard_reset(adapter, rwi, reset_state); |
| rtnl_unlock(); |
| } |
| } else if (!(rwi->reset_reason == VNIC_RESET_FATAL && |
| adapter->from_passive_init)) { |
| rc = do_reset(adapter, rwi, reset_state); |
| } |
| kfree(rwi); |
| if (rc == IBMVNIC_OPEN_FAILED) { |
| if (list_empty(&adapter->rwi_list)) |
| adapter->state = VNIC_CLOSED; |
| else |
| adapter->state = reset_state; |
| rc = 0; |
| } else if (rc && rc != IBMVNIC_INIT_FAILED && |
| !adapter->force_reset_recovery) |
| break; |
| |
| rwi = get_next_rwi(adapter); |
| |
| if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || |
| rwi->reset_reason == VNIC_RESET_MOBILITY)) |
| adapter->force_reset_recovery = true; |
| } |
| |
| if (adapter->wait_for_reset) { |
| adapter->reset_done_rc = rc; |
| complete(&adapter->reset_done); |
| } |
| |
| if (rc) { |
| netdev_dbg(adapter->netdev, "Reset failed\n"); |
| free_all_rwi(adapter); |
| } |
| |
| clear_bit_unlock(0, &adapter->resetting); |
| } |
| |
| static void __ibmvnic_delayed_reset(struct work_struct *work) |
| { |
| struct ibmvnic_adapter *adapter; |
| |
| adapter = container_of(work, struct ibmvnic_adapter, |
| ibmvnic_delayed_reset.work); |
| __ibmvnic_reset(&adapter->ibmvnic_reset); |
| } |
| |
| static int ibmvnic_reset(struct ibmvnic_adapter *adapter, |
| enum ibmvnic_reset_reason reason) |
| { |
| struct list_head *entry, *tmp_entry; |
| struct ibmvnic_rwi *rwi, *tmp; |
| struct net_device *netdev = adapter->netdev; |
| unsigned long flags; |
| int ret; |
| |
| if (adapter->state == VNIC_REMOVING || |
| adapter->state == VNIC_REMOVED || |
| adapter->failover_pending) { |
| ret = EBUSY; |
| netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); |
| goto err; |
| } |
| |
| if (adapter->state == VNIC_PROBING) { |
| netdev_warn(netdev, "Adapter reset during probe\n"); |
| ret = adapter->init_done_rc = EAGAIN; |
| goto err; |
| } |
| |
| spin_lock_irqsave(&adapter->rwi_lock, flags); |
| |
| list_for_each(entry, &adapter->rwi_list) { |
| tmp = list_entry(entry, struct ibmvnic_rwi, list); |
| if (tmp->reset_reason == reason) { |
| netdev_dbg(netdev, "Skipping matching reset\n"); |
| spin_unlock_irqrestore(&adapter->rwi_lock, flags); |
| ret = EBUSY; |
| goto err; |
| } |
| } |
| |
| rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); |
| if (!rwi) { |
| spin_unlock_irqrestore(&adapter->rwi_lock, flags); |
| ibmvnic_close(netdev); |
| ret = ENOMEM; |
| goto err; |
| } |
| /* if we just received a transport event, |
| * flush reset queue and process this reset |
| */ |
| if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { |
| list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) |
| list_del(entry); |
| } |
| rwi->reset_reason = reason; |
| list_add_tail(&rwi->list, &adapter->rwi_list); |
| spin_unlock_irqrestore(&adapter->rwi_lock, flags); |
| netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); |
| schedule_work(&adapter->ibmvnic_reset); |
| |
| return 0; |
| err: |
| return -ret; |
| } |
| |
| static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(dev); |
| |
| ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); |
| } |
| |
| 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 (unlikely(test_bit(0, &adapter->resetting) && |
| adapter->reset_reason != VNIC_RESET_NON_FATAL)) { |
| enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); |
| napi_complete_done(napi, frames_processed); |
| return frames_processed; |
| } |
| |
| 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_dbg(netdev, "rx buffer returned with rc %x\n", |
| be16_to_cpu(next->rx_comp.rc)); |
| /* free the entry */ |
| next->rx_comp.first = 0; |
| dev_kfree_skb_any(rx_buff->skb); |
| remove_buff_from_pool(adapter, rx_buff); |
| continue; |
| } else if (!rx_buff->skb) { |
| /* free the entry */ |
| next->rx_comp.first = 0; |
| remove_buff_from_pool(adapter, rx_buff); |
| continue; |
| } |
| |
| 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); |
| |
| /* VLAN Header has been stripped by the system firmware and |
| * needs to be inserted by the driver |
| */ |
| if (adapter->rx_vlan_header_insertion && |
| (flags & IBMVNIC_VLAN_STRIPPED)) |
| __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), |
| ntohs(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); |
| skb_record_rx_queue(skb, scrq_num); |
| |
| 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; |
| adapter->rx_stats_buffers[scrq_num].packets++; |
| adapter->rx_stats_buffers[scrq_num].bytes += length; |
| frames_processed++; |
| } |
| |
| if (adapter->state != VNIC_CLOSING) |
| replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); |
| |
| if (frames_processed < budget) { |
| enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); |
| napi_complete_done(napi, frames_processed); |
| 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; |
| } |
| |
| static int wait_for_reset(struct ibmvnic_adapter *adapter) |
| { |
| int rc, ret; |
| |
| adapter->fallback.mtu = adapter->req_mtu; |
| adapter->fallback.rx_queues = adapter->req_rx_queues; |
| adapter->fallback.tx_queues = adapter->req_tx_queues; |
| adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; |
| adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; |
| |
| reinit_completion(&adapter->reset_done); |
| adapter->wait_for_reset = true; |
| rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); |
| |
| if (rc) { |
| ret = rc; |
| goto out; |
| } |
| rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); |
| if (rc) { |
| ret = -ENODEV; |
| goto out; |
| } |
| |
| ret = 0; |
| if (adapter->reset_done_rc) { |
| ret = -EIO; |
| adapter->desired.mtu = adapter->fallback.mtu; |
| adapter->desired.rx_queues = adapter->fallback.rx_queues; |
| adapter->desired.tx_queues = adapter->fallback.tx_queues; |
| adapter->desired.rx_entries = adapter->fallback.rx_entries; |
| adapter->desired.tx_entries = adapter->fallback.tx_entries; |
| |
| reinit_completion(&adapter->reset_done); |
| adapter->wait_for_reset = true; |
| rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); |
| if (rc) { |
| ret = rc; |
| goto out; |
| } |
| rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, |
| 60000); |
| if (rc) { |
| ret = -ENODEV; |
| goto out; |
| } |
| } |
| out: |
| adapter->wait_for_reset = false; |
| |
| return ret; |
| } |
| |
| static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| |
| adapter->desired.mtu = new_mtu + ETH_HLEN; |
| |
| return wait_for_reset(adapter); |
| } |
| |
| static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, |
| struct net_device *dev, |
| netdev_features_t features) |
| { |
| /* Some backing hardware adapters can not |
| * handle packets with a MSS less than 224 |
| * or with only one segment. |
| */ |
| if (skb_is_gso(skb)) { |
| if (skb_shinfo(skb)->gso_size < 224 || |
| skb_shinfo(skb)->gso_segs == 1) |
| features &= ~NETIF_F_GSO_MASK; |
| } |
| |
| return features; |
| } |
| |
| 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_tx_timeout = ibmvnic_tx_timeout, |
| .ndo_change_mtu = ibmvnic_change_mtu, |
| .ndo_features_check = ibmvnic_features_check, |
| }; |
| |
| /* ethtool functions */ |
| |
| static int ibmvnic_get_link_ksettings(struct net_device *netdev, |
| struct ethtool_link_ksettings *cmd) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| int rc; |
| |
| rc = send_query_phys_parms(adapter); |
| if (rc) { |
| adapter->speed = SPEED_UNKNOWN; |
| adapter->duplex = DUPLEX_UNKNOWN; |
| } |
| cmd->base.speed = adapter->speed; |
| cmd->base.duplex = adapter->duplex; |
| cmd->base.port = PORT_FIBRE; |
| cmd->base.phy_address = 0; |
| cmd->base.autoneg = AUTONEG_ENABLE; |
| |
| return 0; |
| } |
| |
| static void ibmvnic_get_drvinfo(struct net_device *netdev, |
| struct ethtool_drvinfo *info) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| |
| strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); |
| strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); |
| strlcpy(info->fw_version, adapter->fw_version, |
| sizeof(info->fw_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) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| |
| if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { |
| ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; |
| ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; |
| } else { |
| ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; |
| ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; |
| } |
| ring->rx_mini_max_pending = 0; |
| ring->rx_jumbo_max_pending = 0; |
| ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; |
| ring->tx_pending = adapter->req_tx_entries_per_subcrq; |
| ring->rx_mini_pending = 0; |
| ring->rx_jumbo_pending = 0; |
| } |
| |
| static int ibmvnic_set_ringparam(struct net_device *netdev, |
| struct ethtool_ringparam *ring) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| int ret; |
| |
| ret = 0; |
| adapter->desired.rx_entries = ring->rx_pending; |
| adapter->desired.tx_entries = ring->tx_pending; |
| |
| ret = wait_for_reset(adapter); |
| |
| if (!ret && |
| (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || |
| adapter->req_tx_entries_per_subcrq != ring->tx_pending)) |
| netdev_info(netdev, |
| "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", |
| ring->rx_pending, ring->tx_pending, |
| adapter->req_rx_add_entries_per_subcrq, |
| adapter->req_tx_entries_per_subcrq); |
| return ret; |
| } |
| |
| static void ibmvnic_get_channels(struct net_device *netdev, |
| struct ethtool_channels *channels) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| |
| if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { |
| channels->max_rx = adapter->max_rx_queues; |
| channels->max_tx = adapter->max_tx_queues; |
| } else { |
| channels->max_rx = IBMVNIC_MAX_QUEUES; |
| channels->max_tx = IBMVNIC_MAX_QUEUES; |
| } |
| |
| channels->max_other = 0; |
| channels->max_combined = 0; |
| channels->rx_count = adapter->req_rx_queues; |
| channels->tx_count = adapter->req_tx_queues; |
| channels->other_count = 0; |
| channels->combined_count = 0; |
| } |
| |
| static int ibmvnic_set_channels(struct net_device *netdev, |
| struct ethtool_channels *channels) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| int ret; |
| |
| ret = 0; |
| adapter->desired.rx_queues = channels->rx_count; |
| adapter->desired.tx_queues = channels->tx_count; |
| |
| ret = wait_for_reset(adapter); |
| |
| if (!ret && |
| (adapter->req_rx_queues != channels->rx_count || |
| adapter->req_tx_queues != channels->tx_count)) |
| netdev_info(netdev, |
| "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", |
| channels->rx_count, channels->tx_count, |
| adapter->req_rx_queues, adapter->req_tx_queues); |
| return ret; |
| |
| } |
| |
| static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(dev); |
| int i; |
| |
| switch (stringset) { |
| case ETH_SS_STATS: |
| for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); |
| i++, data += ETH_GSTRING_LEN) |
| memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); |
| |
| for (i = 0; i < adapter->req_tx_queues; i++) { |
| snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); |
| data += ETH_GSTRING_LEN; |
| |
| snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); |
| data += ETH_GSTRING_LEN; |
| |
| snprintf(data, ETH_GSTRING_LEN, |
| "tx%d_dropped_packets", i); |
| data += ETH_GSTRING_LEN; |
| } |
| |
| for (i = 0; i < adapter->req_rx_queues; i++) { |
| snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); |
| data += ETH_GSTRING_LEN; |
| |
| snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); |
| data += ETH_GSTRING_LEN; |
| |
| snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); |
| data += ETH_GSTRING_LEN; |
| } |
| break; |
| |
| case ETH_SS_PRIV_FLAGS: |
| for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) |
| strcpy(data + i * ETH_GSTRING_LEN, |
| ibmvnic_priv_flags[i]); |
| break; |
| default: |
| return; |
| } |
| } |
| |
| static int ibmvnic_get_sset_count(struct net_device *dev, int sset) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(dev); |
| |
| switch (sset) { |
| case ETH_SS_STATS: |
| return ARRAY_SIZE(ibmvnic_stats) + |
| adapter->req_tx_queues * NUM_TX_STATS + |
| adapter->req_rx_queues * NUM_RX_STATS; |
| case ETH_SS_PRIV_FLAGS: |
| return ARRAY_SIZE(ibmvnic_priv_flags); |
| 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, j; |
| int rc; |
| |
| 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)); |
| |
| /* Wait for data to be written */ |
| reinit_completion(&adapter->stats_done); |
| rc = ibmvnic_send_crq(adapter, &crq); |
| if (rc) |
| return; |
| rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); |
| if (rc) |
| return; |
| |
| for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) |
| data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, |
| ibmvnic_stats[i].offset)); |
| |
| for (j = 0; j < adapter->req_tx_queues; j++) { |
| data[i] = adapter->tx_stats_buffers[j].packets; |
| i++; |
| data[i] = adapter->tx_stats_buffers[j].bytes; |
| i++; |
| data[i] = adapter->tx_stats_buffers[j].dropped_packets; |
| i++; |
| } |
| |
| for (j = 0; j < adapter->req_rx_queues; j++) { |
| data[i] = adapter->rx_stats_buffers[j].packets; |
| i++; |
| data[i] = adapter->rx_stats_buffers[j].bytes; |
| i++; |
| data[i] = adapter->rx_stats_buffers[j].interrupts; |
| i++; |
| } |
| } |
| |
| static u32 ibmvnic_get_priv_flags(struct net_device *netdev) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| |
| return adapter->priv_flags; |
| } |
| |
| static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) |
| { |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); |
| |
| if (which_maxes) |
| adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; |
| else |
| adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; |
| |
| return 0; |
| } |
| static const struct ethtool_ops ibmvnic_ethtool_ops = { |
| .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, |
| .set_ringparam = ibmvnic_set_ringparam, |
| .get_channels = ibmvnic_get_channels, |
| .set_channels = ibmvnic_set_channels, |
| .get_strings = ibmvnic_get_strings, |
| .get_sset_count = ibmvnic_get_sset_count, |
| .get_ethtool_stats = ibmvnic_get_ethtool_stats, |
| .get_link_ksettings = ibmvnic_get_link_ksettings, |
| .get_priv_flags = ibmvnic_get_priv_flags, |
| .set_priv_flags = ibmvnic_set_priv_flags, |
| }; |
| |
| /* Routines for managing CRQs/sCRQs */ |
| |
| static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_sub_crq_queue *scrq) |
| { |
| int rc; |
| |
| if (scrq->irq) { |
| free_irq(scrq->irq, scrq); |
| irq_dispose_mapping(scrq->irq); |
| scrq->irq = 0; |
| } |
| |
| memset(scrq->msgs, 0, 4 * PAGE_SIZE); |
| atomic_set(&scrq->used, 0); |
| scrq->cur = 0; |
| |
| rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, |
| 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); |
| return rc; |
| } |
| |
| static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) |
| { |
| int i, rc; |
| |
| for (i = 0; i < adapter->req_tx_queues; i++) { |
| netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); |
| rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); |
| if (rc) |
| return rc; |
| } |
| |
| for (i = 0; i < adapter->req_rx_queues; i++) { |
| netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); |
| rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); |
| if (rc) |
| return rc; |
| } |
| |
| return rc; |
| } |
| |
| static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, |
| struct ibmvnic_sub_crq_queue *scrq, |
| bool do_h_free) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| long rc; |
| |
| netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); |
| |
| if (do_h_free) { |
| /* 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)); |
| |
| if (rc) { |
| netdev_err(adapter->netdev, |
| "Failed to release sub-CRQ %16lx, rc = %ld\n", |
| scrq->crq_num, 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 = kzalloc(sizeof(*scrq), GFP_KERNEL); |
| if (!scrq) |
| return NULL; |
| |
| scrq->msgs = |
| (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); |
| 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); |
| 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, bool do_h_free) |
| { |
| int i; |
| |
| if (adapter->tx_scrq) { |
| for (i = 0; i < adapter->num_active_tx_scrqs; i++) { |
| if (!adapter->tx_scrq[i]) |
| continue; |
| |
| netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", |
| i); |
| if (adapter->tx_scrq[i]->irq) { |
| free_irq(adapter->tx_scrq[i]->irq, |
| adapter->tx_scrq[i]); |
| irq_dispose_mapping(adapter->tx_scrq[i]->irq); |
| adapter->tx_scrq[i]->irq = 0; |
| } |
| |
| release_sub_crq_queue(adapter, adapter->tx_scrq[i], |
| do_h_free); |
| } |
| |
| kfree(adapter->tx_scrq); |
| adapter->tx_scrq = NULL; |
| adapter->num_active_tx_scrqs = 0; |
| } |
| |
| if (adapter->rx_scrq) { |
| for (i = 0; i < adapter->num_active_rx_scrqs; i++) { |
| if (!adapter->rx_scrq[i]) |
| continue; |
| |
| netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", |
| i); |
| if (adapter->rx_scrq[i]->irq) { |
| free_irq(adapter->rx_scrq[i]->irq, |
| adapter->rx_scrq[i]); |
| irq_dispose_mapping(adapter->rx_scrq[i]->irq); |
| adapter->rx_scrq[i]->irq = 0; |
| } |
| |
| release_sub_crq_queue(adapter, adapter->rx_scrq[i], |
| do_h_free); |
| } |
| |
| kfree(adapter->rx_scrq); |
| adapter->rx_scrq = NULL; |
| adapter->num_active_rx_scrqs = 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; |
| } |
| |
| if (test_bit(0, &adapter->resetting) && |
| adapter->reset_reason == VNIC_RESET_MOBILITY) { |
| u64 val = (0xff000000) | scrq->hw_irq; |
| |
| rc = plpar_hcall_norets(H_EOI, val); |
| /* H_EOI would fail with rc = H_FUNCTION when running |
| * in XIVE mode which is expected, but not an error. |
| */ |
| if (rc && (rc != H_FUNCTION)) |
| dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", |
| val, rc); |
| } |
| |
| 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_pool *tx_pool; |
| struct ibmvnic_tx_buff *txbuff; |
| union sub_crq *next; |
| int index; |
| int i, j; |
| |
| restart_loop: |
| while (pending_scrq(adapter, scrq)) { |
| unsigned int pool = scrq->pool_index; |
| int num_entries = 0; |
| |
| 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]); |
| if (index & IBMVNIC_TSO_POOL_MASK) { |
| tx_pool = &adapter->tso_pool[pool]; |
| index &= ~IBMVNIC_TSO_POOL_MASK; |
| } else { |
| tx_pool = &adapter->tx_pool[pool]; |
| } |
| |
| txbuff = &tx_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; |
| } |
| |
| if (txbuff->last_frag) { |
| dev_kfree_skb_any(txbuff->skb); |
| txbuff->skb = NULL; |
| } |
| |
| num_entries += txbuff->num_entries; |
| |
| tx_pool->free_map[tx_pool->producer_index] = index; |
| tx_pool->producer_index = |
| (tx_pool->producer_index + 1) % |
| tx_pool->num_buffers; |
| } |
| /* remove tx_comp scrq*/ |
| next->tx_comp.first = 0; |
| |
| if (atomic_sub_return(num_entries, &scrq->used) <= |
| (adapter->req_tx_entries_per_subcrq / 2) && |
| __netif_subqueue_stopped(adapter->netdev, |
| scrq->pool_index)) { |
| netif_wake_subqueue(adapter->netdev, scrq->pool_index); |
| netdev_dbg(adapter->netdev, "Started queue %d\n", |
| scrq->pool_index); |
| } |
| } |
| |
| 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; |
| |
| /* When booting a kdump kernel we can hit pending interrupts |
| * prior to completing driver initialization. |
| */ |
| if (unlikely(adapter->state != VNIC_OPEN)) |
| return IRQ_NONE; |
| |
| adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; |
| |
| 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++) { |
| netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", |
| 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; |
| } |
| |
| snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", |
| adapter->vdev->unit_address, i); |
| rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, |
| 0, scrq->name, 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_tx_irq_failed; |
| } |
| } |
| |
| for (i = 0; i < adapter->req_rx_queues; i++) { |
| netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", |
| 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; |
| } |
| snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", |
| adapter->vdev->unit_address, i); |
| rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, |
| 0, scrq->name, 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->tx_scrq[j]->irq); |
| } |
| release_sub_crqs(adapter, 1); |
| return rc; |
| } |
| |
| static int init_sub_crqs(struct ibmvnic_adapter *adapter) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| struct ibmvnic_sub_crq_queue **allqueues; |
| int registered_queues = 0; |
| int total_queues; |
| int more = 0; |
| int i; |
| |
| total_queues = adapter->req_tx_queues + adapter->req_rx_queues; |
| |
| allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); |
| if (!allqueues) |
| return -1; |
| |
| 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_KERNEL); |
| 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->num_active_tx_scrqs++; |
| } |
| |
| adapter->rx_scrq = kcalloc(adapter->req_rx_queues, |
| sizeof(*adapter->rx_scrq), GFP_KERNEL); |
| 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; |
| adapter->num_active_rx_scrqs++; |
| } |
| |
| kfree(allqueues); |
| return 0; |
| |
| 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], 1); |
| kfree(allqueues); |
| return -1; |
| } |
| |
| static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| union ibmvnic_crq crq; |
| int max_entries; |
| |
| 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"); |
| return; |
| } |
| |
| if (adapter->desired.mtu) |
| adapter->req_mtu = adapter->desired.mtu; |
| else |
| adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; |
| |
| if (!adapter->desired.tx_entries) |
| adapter->desired.tx_entries = |
| adapter->max_tx_entries_per_subcrq; |
| if (!adapter->desired.rx_entries) |
| adapter->desired.rx_entries = |
| adapter->max_rx_add_entries_per_subcrq; |
| |
| max_entries = IBMVNIC_MAX_LTB_SIZE / |
| (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); |
| |
| if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * |
| adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { |
| adapter->desired.tx_entries = max_entries; |
| } |
| |
| if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * |
| adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { |
| adapter->desired.rx_entries = max_entries; |
| } |
| |
| if (adapter->desired.tx_entries) |
| adapter->req_tx_entries_per_subcrq = |
| adapter->desired.tx_entries; |
| else |
| adapter->req_tx_entries_per_subcrq = |
| adapter->max_tx_entries_per_subcrq; |
| |
| if (adapter->desired.rx_entries) |
| adapter->req_rx_add_entries_per_subcrq = |
| adapter->desired.rx_entries; |
| else |
| adapter->req_rx_add_entries_per_subcrq = |
| adapter->max_rx_add_entries_per_subcrq; |
| |
| if (adapter->desired.tx_queues) |
| adapter->req_tx_queues = |
| adapter->desired.tx_queues; |
| else |
| adapter->req_tx_queues = |
| adapter->opt_tx_comp_sub_queues; |
| |
| if (adapter->desired.rx_queues) |
| adapter->req_rx_queues = |
| adapter->desired.rx_queues; |
| else |
| adapter->req_rx_queues = |
| adapter->opt_rx_comp_queues; |
| |
| adapter->req_rx_add_queues = adapter->max_rx_add_queues; |
| } |
| |
| 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); |
| atomic_inc(&adapter->running_cap_crqs); |
| 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); |
| atomic_inc(&adapter->running_cap_crqs); |
| 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); |
| atomic_inc(&adapter->running_cap_crqs); |
| 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); |
| atomic_inc(&adapter->running_cap_crqs); |
| 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); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.request_capability.capability = cpu_to_be16(REQ_MTU); |
| crq.request_capability.number = cpu_to_be64(adapter->req_mtu); |
| atomic_inc(&adapter->running_cap_crqs); |
| 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); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| } |
| } else { |
| crq.request_capability.capability = |
| cpu_to_be16(PROMISC_REQUESTED); |
| crq.request_capability.number = cpu_to_be64(0); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| } |
| } |
| |
| 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) |
| 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 void print_subcrq_error(struct device *dev, int rc, const char *func) |
| { |
| switch (rc) { |
| case H_PARAMETER: |
| dev_warn_ratelimited(dev, |
| "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", |
| func, rc); |
| break; |
| case H_CLOSED: |
| dev_warn_ratelimited(dev, |
| "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", |
| func, rc); |
| break; |
| default: |
| dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); |
| break; |
| } |
| } |
| |
| 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) |
| print_subcrq_error(dev, rc, __func__); |
| |
| 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) |
| print_subcrq_error(dev, rc, __func__); |
| |
| 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])); |
| |
| if (!adapter->crq.active && |
| crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { |
| dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); |
| return -EINVAL; |
| } |
| |
| /* 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"); |
| /* do not reset, report the fail, wait for passive init from server */ |
| } |
| |
| dev_warn(dev, "Send error (rc=%d)\n", rc); |
| } |
| |
| return rc; |
| } |
| |
| static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| union ibmvnic_crq crq; |
| int retries = 100; |
| int rc; |
| |
| 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"); |
| |
| do { |
| rc = ibmvnic_send_crq(adapter, &crq); |
| if (rc != H_CLOSED) |
| break; |
| retries--; |
| msleep(50); |
| |
| } while (retries > 0); |
| |
| if (rc) { |
| dev_err(dev, "Failed to send init request, rc = %d\n", rc); |
| return rc; |
| } |
| |
| return 0; |
| } |
| |
| 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); |
| } |
| |
| struct vnic_login_client_data { |
| u8 type; |
| __be16 len; |
| char name[]; |
| } __packed; |
| |
| static int vnic_client_data_len(struct ibmvnic_adapter *adapter) |
| { |
| int len; |
| |
| /* Calculate the amount of buffer space needed for the |
| * vnic client data in the login buffer. There are four entries, |
| * OS name, LPAR name, device name, and a null last entry. |
| */ |
| len = 4 * sizeof(struct vnic_login_client_data); |
| len += 6; /* "Linux" plus NULL */ |
| len += strlen(utsname()->nodename) + 1; |
| len += strlen(adapter->netdev->name) + 1; |
| |
| return len; |
| } |
| |
| static void vnic_add_client_data(struct ibmvnic_adapter *adapter, |
| struct vnic_login_client_data *vlcd) |
| { |
| const char *os_name = "Linux"; |
| int len; |
| |
| /* Type 1 - LPAR OS */ |
| vlcd->type = 1; |
| len = strlen(os_name) + 1; |
| vlcd->len = cpu_to_be16(len); |
| strncpy(vlcd->name, os_name, len); |
| vlcd = (struct vnic_login_client_data *)(vlcd->name + len); |
| |
| /* Type 2 - LPAR name */ |
| vlcd->type = 2; |
| len = strlen(utsname()->nodename) + 1; |
| vlcd->len = cpu_to_be16(len); |
| strncpy(vlcd->name, utsname()->nodename, len); |
| vlcd = (struct vnic_login_client_data *)(vlcd->name + len); |
| |
| /* Type 3 - device name */ |
| vlcd->type = 3; |
| len = strlen(adapter->netdev->name) + 1; |
| vlcd->len = cpu_to_be16(len); |
| strncpy(vlcd->name, adapter->netdev->name, len); |
| } |
| |
| static int send_login(struct ibmvnic_adapter *adapter) |
| { |
| struct ibmvnic_login_rsp_buffer *login_rsp_buffer; |
| struct ibmvnic_login_buffer *login_buffer; |
| 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; |
| size_t buffer_size; |
| __be64 *tx_list_p; |
| __be64 *rx_list_p; |
| int client_data_len; |
| struct vnic_login_client_data *vlcd; |
| int i; |
| |
| if (!adapter->tx_scrq || !adapter->rx_scrq) { |
| netdev_err(adapter->netdev, |
| "RX or TX queues are not allocated, device login failed\n"); |
| return -1; |
| } |
| |
| release_login_rsp_buffer(adapter); |
| client_data_len = vnic_client_data_len(adapter); |
| |
| buffer_size = |
| sizeof(struct ibmvnic_login_buffer) + |
| sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + |
| client_data_len; |
| |
| login_buffer = kzalloc(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; |
| } |
| |
| 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); |
| } |
| } |
| |
| /* Insert vNIC login client data */ |
| vlcd = (struct vnic_login_client_data *) |
| ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); |
| login_buffer->client_data_offset = |
| cpu_to_be32((char *)vlcd - (char *)login_buffer); |
| login_buffer->client_data_len = cpu_to_be32(client_data_len); |
| |
| vnic_add_client_data(adapter, vlcd); |
| |
| 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); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| return 0; |
| |
| 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 -1; |
| } |
| |
| static int 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); |
| return ibmvnic_send_crq(adapter, &crq); |
| } |
| |
| static int 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; |
| return ibmvnic_send_crq(adapter, &crq); |
| } |
| |
| static void send_query_map(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_query_cap(struct ibmvnic_adapter *adapter) |
| { |
| union ibmvnic_crq crq; |
| |
| atomic_set(&adapter->running_cap_crqs, 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_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = |
| cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = |
| cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = |
| cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = |
| cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(MIN_MTU); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(MAX_MTU); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); |
| atomic_inc(&adapter->running_cap_crqs); |
| 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_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = |
| cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = |
| cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| |
| crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); |
| atomic_inc(&adapter->running_cap_crqs); |
| ibmvnic_send_crq(adapter, &crq); |
| } |
| |
| static void send_query_ip_offload(struct ibmvnic_adapter *adapter) |
| { |
| int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); |
| struct device *dev = &adapter->vdev->dev; |
| union ibmvnic_crq crq; |
| |
| adapter->ip_offload_tok = |
| dma_map_single(dev, |
| &adapter->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(&crq, 0, sizeof(crq)); |
| crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; |
| crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; |
| crq.query_ip_offload.len = cpu_to_be32(buf_sz); |
| crq.query_ip_offload.ioba = |
| cpu_to_be32(adapter->ip_offload_tok); |
| |
| ibmvnic_send_crq(adapter, &crq); |
| } |
| |
| static void send_control_ip_offload(struct ibmvnic_adapter *adapter) |
| { |
| struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; |
| struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; |
| struct device *dev = &adapter->vdev->dev; |
| netdev_features_t old_hw_features = 0; |
| union ibmvnic_crq crq; |
| |
| adapter->ip_offload_ctrl_tok = |
| dma_map_single(dev, |
| ctrl_buf, |
| 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; |
| } |
| |
| ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); |
| ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); |
| ctrl_buf->ipv4_chksum = buf->ipv4_chksum; |
| ctrl_buf->ipv6_chksum = buf->ipv6_chksum; |
| ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; |
| ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; |
| ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; |
| ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; |
| ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; |
| ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; |
| |
| /* large_rx disabled for now, additional features needed */ |
| ctrl_buf->large_rx_ipv4 = 0; |
| ctrl_buf->large_rx_ipv6 = 0; |
| |
| if (adapter->state != VNIC_PROBING) { |
| old_hw_features = adapter->netdev->hw_features; |
| adapter->netdev->hw_features = 0; |
| } |
| |
| adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; |
| |
| if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) |
| adapter->netdev->hw_features |= NETIF_F_IP_CSUM; |
| |
| if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) |
| adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; |
| |
| if ((adapter->netdev->features & |
| (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) |
| adapter->netdev->hw_features |= NETIF_F_RXCSUM; |
| |
| if (buf->large_tx_ipv4) |
| adapter->netdev->hw_features |= NETIF_F_TSO; |
| if (buf->large_tx_ipv6) |
| adapter->netdev->hw_features |= NETIF_F_TSO6; |
| |
| if (adapter->state == VNIC_PROBING) { |
| adapter->netdev->features |= adapter->netdev->hw_features; |
| } else if (old_hw_features != adapter->netdev->hw_features) { |
| netdev_features_t tmp = 0; |
| |
| /* disable features no longer supported */ |
| adapter->netdev->features &= adapter->netdev->hw_features; |
| /* turn on features now supported if previously enabled */ |
| tmp = (old_hw_features ^ adapter->netdev->hw_features) & |
| adapter->netdev->hw_features; |
| adapter->netdev->features |= |
| tmp & adapter->netdev->wanted_features; |
| } |
| |
| 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_vpd_size_rsp(union ibmvnic_crq *crq, |
| struct ibmvnic_adapter *adapter) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| |
| if (crq->get_vpd_size_rsp.rc.code) { |
| dev_err(dev, "Error retrieving VPD size, rc=%x\n", |
| crq->get_vpd_size_rsp.rc.code); |
| complete(&adapter->fw_done); |
| return; |
| } |
| |
| adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); |
| complete(&adapter->fw_done); |
| } |
| |
| static void handle_vpd_rsp(union ibmvnic_crq *crq, |
| struct ibmvnic_adapter *adapter) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| unsigned char *substr = NULL; |
| u8 fw_level_len = 0; |
| |
| memset(adapter->fw_version, 0, 32); |
| |
| dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, |
| DMA_FROM_DEVICE); |
| |
| if (crq->get_vpd_rsp.rc.code) { |
| dev_err(dev, "Error retrieving VPD from device, rc=%x\n", |
| crq->get_vpd_rsp.rc.code); |
| goto complete; |
| } |
| |
| /* get the position of the firmware version info |
| * located after the ASCII 'RM' substring in the buffer |
| */ |
| substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); |
| if (!substr) { |
| dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); |
| goto complete; |
| } |
| |
| /* get length of firmware level ASCII substring */ |
| if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { |
| fw_level_len = *(substr + 2); |
| } else { |
| dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); |
| goto complete; |
| } |
| |
| /* copy firmware version string from vpd into adapter */ |
| if ((substr + 3 + fw_level_len) < |
| (adapter->vpd->buff + adapter->vpd->len)) { |
| strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); |
| } else { |
| dev_info(dev, "FW substr extrapolated VPD buff\n"); |
| } |
| |
| complete: |
| if (adapter->fw_version[0] == '\0') |
| strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); |
| complete(&adapter->fw_done); |
| } |
| |
| 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; |
| 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); |
| |
| send_control_ip_offload(adapter); |
| } |
| |
| static const char *ibmvnic_fw_err_cause(u16 cause) |
| { |
| switch (cause) { |
| case ADAPTER_PROBLEM: |
| return "adapter problem"; |
| case BUS_PROBLEM: |
| return "bus problem"; |
| case FW_PROBLEM: |
| return "firmware problem"; |
| case DD_PROBLEM: |
| return "device driver problem"; |
| case EEH_RECOVERY: |
| return "EEH recovery"; |
| case FW_UPDATED: |
| return "firmware updated"; |
| case LOW_MEMORY: |
| return "low Memory"; |
| default: |
| return "unknown"; |
| } |
| } |
| |
| static void handle_error_indication(union ibmvnic_crq *crq, |
| struct ibmvnic_adapter *adapter) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| u16 cause; |
| |
| cause = be16_to_cpu(crq->error_indication.error_cause); |
| |
| dev_warn_ratelimited(dev, |
| "Firmware reports %serror, cause: %s. Starting recovery...\n", |
| crq->error_indication.flags |
| & IBMVNIC_FATAL_ERROR ? "FATAL " : "", |
| ibmvnic_fw_err_cause(cause)); |
| |
| if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) |
| ibmvnic_reset(adapter, VNIC_RESET_FATAL); |
| else |
| ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); |
| } |
| |
| static int 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); |
| goto out; |
| } |
| ether_addr_copy(netdev->dev_addr, |
| &crq->change_mac_addr_rsp.mac_addr[0]); |
| out: |
| complete(&adapter->fw_done); |
| return rc; |
| } |
| |
| 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; |
| |
| atomic_dec(&adapter->running_cap_crqs); |
| 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)be64_to_cpu(crq->request_capability_rsp. |
| number), name); |
| |
| if (be16_to_cpu(crq->request_capability_rsp.capability) == |
| REQ_MTU) { |
| pr_err("mtu of %llu is not supported. Reverting.\n", |
| *req_value); |
| *req_value = adapter->fallback.mtu; |
| } else { |
| *req_value = |
| be64_to_cpu(crq->request_capability_rsp.number); |
| } |
| |
| send_request_cap(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 (atomic_read(&adapter->running_cap_crqs) == 0) { |
| adapter->wait_capability = false; |
| send_query_ip_offload(adapter); |
| } |
| } |
| |
| static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, |
| struct ibmvnic_adapter *adapter) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| struct net_device *netdev = adapter->netdev; |
| struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; |
| struct ibmvnic_login_buffer *login = adapter->login_buf; |
| u64 *tx_handle_array; |
| u64 *rx_handle_array; |
| int num_tx_pools; |
| int num_rx_pools; |
| u64 *size_array; |
| int i; |
| |
| dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, |
| DMA_TO_DEVICE); |
| dma_unmap_single(dev, adapter->login_rsp_buf_token, |
| adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); |
| |
| /* 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->init_done_rc = login_rsp_crq->generic.rc.code; |
| complete(&adapter->init_done); |
| return 0; |
| } |
| |
| netdev->mtu = adapter->req_mtu - ETH_HLEN; |
| |
| 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; |
| } |
| size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + |
| be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); |
| /* variable buffer sizes are not supported, so just read the |
| * first entry. |
| */ |
| adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); |
| |
| num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); |
| num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); |
| |
| tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + |
| be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); |
| rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + |
| be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); |
| |
| for (i = 0; i < num_tx_pools; i++) |
| adapter->tx_scrq[i]->handle = tx_handle_array[i]; |
| |
| for (i = 0; i < num_rx_pools; i++) |
| adapter->rx_scrq[i]->handle = rx_handle_array[i]; |
| |
| adapter->num_active_tx_scrqs = num_tx_pools; |
| adapter->num_active_rx_scrqs = num_rx_pools; |
| release_login_rsp_buffer(adapter); |
| release_login_buffer(adapter); |
| complete(&adapter->init_done); |
| |
| return 0; |
| } |
| |
| 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_crqs); |
| netdev_dbg(netdev, "Outstanding queries: %d\n", |
| atomic_read(&adapter->running_cap_crqs)); |
| 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->min_mtu = adapter->min_mtu - ETH_HLEN; |
| 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->max_mtu = adapter->max_mtu - ETH_HLEN; |
| 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 RX_VLAN_HEADER_INSERTION: |
| adapter->rx_vlan_header_insertion = |
| be64_to_cpu(crq->query_capability.number); |
| netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", |
| adapter->rx_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_crqs) == 0) { |
| adapter->wait_capability = false; |
| send_request_cap(adapter, 0); |
| } |
| } |
| |
| static int send_query_phys_parms(struct ibmvnic_adapter *adapter) |
| { |
| union ibmvnic_crq crq; |
| int rc; |
| |
| memset(&crq, 0, sizeof(crq)); |
| crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; |
| crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; |
| |
| mutex_lock(&adapter->fw_lock); |
| adapter->fw_done_rc = 0; |
| reinit_completion(&adapter->fw_done); |
| |
| rc = ibmvnic_send_crq(adapter, &crq); |
| if (rc) { |
| mutex_unlock(&adapter->fw_lock); |
| return rc; |
| } |
| |
| rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); |
| if (rc) { |
| mutex_unlock(&adapter->fw_lock); |
| return rc; |
| } |
| |
| mutex_unlock(&adapter->fw_lock); |
| return adapter->fw_done_rc ? -EIO : 0; |
| } |
| |
| static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, |
| struct ibmvnic_adapter *adapter) |
| { |
| struct net_device *netdev = adapter->netdev; |
| int rc; |
| __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); |
| |
| rc = crq->query_phys_parms_rsp.rc.code; |
| if (rc) { |
| netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); |
| return rc; |
| } |
| switch (rspeed) { |
| case IBMVNIC_10MBPS: |
| adapter->speed = SPEED_10; |
| break; |
| case IBMVNIC_100MBPS: |
| adapter->speed = SPEED_100; |
| break; |
| case IBMVNIC_1GBPS: |
| adapter->speed = SPEED_1000; |
| break; |
| case IBMVNIC_10GBPS: |
| adapter->speed = SPEED_10000; |
| break; |
| case IBMVNIC_25GBPS: |
| adapter->speed = SPEED_25000; |
| break; |
| case IBMVNIC_40GBPS: |
| adapter->speed = SPEED_40000; |
| break; |
| case IBMVNIC_50GBPS: |
| adapter->speed = SPEED_50000; |
| break; |
| case IBMVNIC_100GBPS: |
| adapter->speed = SPEED_100000; |
| break; |
| case IBMVNIC_200GBPS: |
| adapter->speed = SPEED_200000; |
| break; |
| default: |
| if (netif_carrier_ok(netdev)) |
| netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); |
| adapter->speed = SPEED_UNKNOWN; |
| } |
| if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) |
| adapter->duplex = DUPLEX_FULL; |
| else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) |
| adapter->duplex = DUPLEX_HALF; |
| else |
| adapter->duplex = DUPLEX_UNKNOWN; |
| |
| return 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; |
| u64 *u64_crq = (u64 *)crq; |
| long rc; |
| |
| netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", |
| (unsigned long int)cpu_to_be64(u64_crq[0]), |
| (unsigned long int)cpu_to_be64(u64_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"); |
| adapter->from_passive_init = true; |
| adapter->failover_pending = false; |
| if (!completion_done(&adapter->init_done)) { |
| complete(&adapter->init_done); |
| adapter->init_done_rc = -EIO; |
| } |
| ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); |
| break; |
| case IBMVNIC_CRQ_INIT_COMPLETE: |
| dev_info(dev, "Partner initialization complete\n"); |
| adapter->crq.active = true; |
| send_version_xchg(adapter); |
| break; |
| default: |
| dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); |
| } |
| return; |
| case IBMVNIC_CRQ_XPORT_EVENT: |
| netif_carrier_off(netdev); |
| adapter->crq.active = false; |
| /* terminate any thread waiting for a response |
| * from the device |
| */ |
| if (!completion_done(&adapter->fw_done)) { |
| adapter->fw_done_rc = -EIO; |
| complete(&adapter->fw_done); |
| } |
| if (!completion_done(&adapter->stats_done)) |
| complete(&adapter->stats_done); |
| if (test_bit(0, &adapter->resetting)) |
| adapter->force_reset_recovery = true; |
| if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { |
| dev_info(dev, "Migrated, re-enabling adapter\n"); |
| ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); |
| } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { |
| dev_info(dev, "Backing device failover detected\n"); |
| adapter->failover_pending = true; |
| } else { |
| /* The adapter lost the connection */ |
| dev_err(dev, "Virtual Adapter failed (rc=%d)\n", |
| gen_crq->cmd); |
| ibmvnic_reset(adapter, VNIC_RESET_FATAL); |
| } |
| 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; |
| } |
| ibmvnic_version = |
| be16_to_cpu(crq->version_exchange_rsp.version); |
| dev_info(dev, "Partner protocol version is %d\n", |
| ibmvnic_version); |
| send_query_cap(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: |
| adapter->fw_done_rc = crq->request_map_rsp.rc.code; |
| complete(&adapter->fw_done); |
| 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, state: %d rc: %d\n", |
| crq->logical_link_state_rsp.link_state, |
| crq->logical_link_state_rsp.rc.code); |
| adapter->logical_link_state = |
| crq->logical_link_state_rsp.link_state; |
| adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; |
| complete(&adapter->init_done); |
| 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; |
| if (adapter->phys_link_state && adapter->logical_link_state) |
| netif_carrier_on(netdev); |
| else |
| netif_carrier_off(netdev); |
| break; |
| case CHANGE_MAC_ADDR_RSP: |
| netdev_dbg(netdev, "Got MAC address change Response\n"); |
| adapter->fw_done_rc = 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_STATISTICS_RSP: |
| netdev_dbg(netdev, "Got Statistics Response\n"); |
| complete(&adapter->stats_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); |
| complete(&adapter->init_done); |
| break; |
| case COLLECT_FW_TRACE_RSP: |
| netdev_dbg(netdev, "Got Collect firmware trace Response\n"); |
| complete(&adapter->fw_done); |
| break; |
| case GET_VPD_SIZE_RSP: |
| handle_vpd_size_rsp(crq, adapter); |
| break; |
| case GET_VPD_RSP: |
| handle_vpd_rsp(crq, adapter); |
| break; |
| case QUERY_PHYS_PARMS_RSP: |
| adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); |
| 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; |
| |
| tasklet_schedule(&adapter->tasklet); |
| return IRQ_HANDLED; |
| } |
| |
| static void ibmvnic_tasklet(struct tasklet_struct *t) |
| { |
| struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); |
| struct ibmvnic_crq_queue *queue = &adapter->crq; |
| union ibmvnic_crq *crq; |
| unsigned long flags; |
| bool done = false; |
| |
| spin_lock_irqsave(&queue->lock, flags); |
| 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; |
| } |
| |
| /* remain in tasklet until all |
| * capabilities responses are received |
| */ |
| if (!adapter->wait_capability) |
| done = true; |
| } |
| /* if capabilities CRQ's were sent in this tasklet, the following |
| * tasklet must wait until all responses are received |
| */ |
| if (atomic_read(&adapter->running_cap_crqs) != 0) |
| adapter->wait_capability = true; |
| spin_unlock_irqrestore(&queue->lock, flags); |
| } |
| |
| 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; |
| crq->active = false; |
| |
| /* 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 release_crq_queue(struct ibmvnic_adapter *adapter) |
| { |
| struct ibmvnic_crq_queue *crq = &adapter->crq; |
| struct vio_dev *vdev = adapter->vdev; |
| long rc; |
| |
| if (!crq->msgs) |
| return; |
| |
| netdev_dbg(adapter->netdev, "Releasing CRQ\n"); |
| free_irq(vdev->irq, adapter); |
| tasklet_kill(&adapter->tasklet); |
| 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); |
| crq->msgs = NULL; |
| crq->active = false; |
| } |
| |
| static int 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; |
| |
| if (crq->msgs) |
| return 0; |
| |
| 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; |
| |
| tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); |
| |
| netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); |
| snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", |
| adapter->vdev->unit_address); |
| rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->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: |
| tasklet_kill(&adapter->tasklet); |
| 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); |
| crq->msgs = NULL; |
| return retrc; |
| } |
| |
| static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) |
| { |
| struct device *dev = &adapter->vdev->dev; |
| unsigned long timeout = msecs_to_jiffies(30000); |
| u64 old_num_rx_queues, old_num_tx_queues; |
| int rc; |
| |
| adapter->from_passive_init = false; |
| |
| if (reset) { |
| old_num_rx_queues = adapter->req_rx_queues; |
| old_num_tx_queues = adapter->req_tx_queues; |
| reinit_completion(&adapter->init_done); |
| } |
| |
| adapter->init_done_rc = 0; |
| rc = ibmvnic_send_crq_init(adapter); |
| if (rc) { |
| dev_err(dev, "Send crq init failed with error %d\n", rc); |
| return rc; |
| } |
| |
| if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { |
| dev_err(dev, "Initialization sequence timed out\n"); |
| return -1; |
| } |
| |
| if (adapter->init_done_rc) { |
| release_crq_queue(adapter); |
| return adapter->init_done_rc; |
| } |
| |
| if (adapter->from_passive_init) { |
| adapter->state = VNIC_OPEN; |
| adapter->from_passive_init = false; |
| return -1; |
| } |
| |
| if (reset && |
| test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && |
| adapter->reset_reason != VNIC_RESET_MOBILITY) { |
| if (adapter->req_rx_queues != old_num_rx_queues || |
| adapter->req_tx_queues != old_num_tx_queues) { |
| release_sub_crqs(adapter, 0); |
| rc = init_sub_crqs(adapter); |
| } else { |
| rc = reset_sub_crq_queues(adapter); |
| } |
| } else { |
| rc = init_sub_crqs(adapter); |
| } |
| |
| if (rc) { |
| dev_err(dev, "Initialization of sub crqs failed\n"); |
| release_crq_queue(adapter); |
| return rc; |
| } |
| |
| rc = init_sub_crq_irqs(adapter); |
| if (rc) { |
| dev_err(dev, "Failed to initialize sub crq irqs\n"); |
| release_crq_queue(adapter); |
| } |
| |
| return rc; |
| } |
| |
| static struct device_attribute dev_attr_failover; |
| |
| static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) |
| { |
| struct ibmvnic_adapter *adapter; |
| struct net_device *netdev; |
| unsigned char *mac_addr_p; |
| 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_QUEUES); |
| if (!netdev) |
| return -ENOMEM; |
| |
| adapter = netdev_priv(netdev); |
| adapter->state = VNIC_PROBING; |
| dev_set_drvdata(&dev->dev, netdev); |
| adapter->vdev = dev; |
| adapter->netdev = netdev; |
| |
| 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); |
| |
| spin_lock_init(&adapter->stats_lock); |
| |
| INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); |
| INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, |
| __ibmvnic_delayed_reset); |
| INIT_LIST_HEAD(&adapter->rwi_list); |
| spin_lock_init(&adapter->rwi_lock); |
| spin_lock_init(&adapter->state_lock); |
| mutex_init(&adapter->fw_lock); |
| init_completion(&adapter->init_done); |
| init_completion(&adapter->fw_done); |
| init_completion(&adapter->reset_done); |
| init_completion(&adapter->stats_done); |
| clear_bit(0, &adapter->resetting); |
| |
| do { |
| rc = init_crq_queue(adapter); |
| if (rc) { |
| dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", |
| rc); |
| goto ibmvnic_init_fail; |
| } |
| |
| rc = ibmvnic_reset_init(adapter, false); |
| if (rc && rc != EAGAIN) |
| goto ibmvnic_init_fail; |
| } while (rc == EAGAIN); |
| |
| rc = init_stats_buffers(adapter); |
| if (rc) |
| goto ibmvnic_init_fail; |
| |
| rc = init_stats_token(adapter); |
| if (rc) |
| goto ibmvnic_stats_fail; |
| |
| netdev->mtu = adapter->req_mtu - ETH_HLEN; |
| netdev->min_mtu = adapter->min_mtu - ETH_HLEN; |
| netdev->max_mtu = adapter->max_mtu - ETH_HLEN; |
| |
| rc = device_create_file(&dev->dev, &dev_attr_failover); |
| if (rc) |
| goto ibmvnic_dev_file_err; |
| |
| netif_carrier_off(netdev); |
| rc = register_netdev(netdev); |
| if (rc) { |
| dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); |
| goto ibmvnic_register_fail; |
| } |
| dev_info(&dev->dev, "ibmvnic registered\n"); |
| |
| adapter->state = VNIC_PROBED; |
| |
| adapter->wait_for_reset = false; |
| |
| return 0; |
| |
| ibmvnic_register_fail: |
| device_remove_file(&dev->dev, &dev_attr_failover); |
| |
| ibmvnic_dev_file_err: |
| release_stats_token(adapter); |
| |
| ibmvnic_stats_fail: |
| release_stats_buffers(adapter); |
| |
| ibmvnic_init_fail: |
| release_sub_crqs(adapter, 1); |
| release_crq_queue(adapter); |
| mutex_destroy(&adapter->fw_lock); |
| 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); |
| unsigned long flags; |
| |
| spin_lock_irqsave(&adapter->state_lock, flags); |
| if (adapter->state == VNIC_RESETTING) { |
| spin_unlock_irqrestore(&adapter->state_lock, flags); |
| return -EBUSY; |
| } |
| |
| adapter->state = VNIC_REMOVING; |
| spin_unlock_irqrestore(&adapter->state_lock, flags); |
| |
| flush_work(&adapter->ibmvnic_reset); |
| flush_delayed_work(&adapter->ibmvnic_delayed_reset); |
| |
| rtnl_lock(); |
| unregister_netdevice(netdev); |
| |
| release_resources(adapter); |
| release_sub_crqs(adapter, 1); |
| release_crq_queue(adapter); |
| |
| release_stats_token(adapter); |
| release_stats_buffers(adapter); |
| |
| adapter->state = VNIC_REMOVED; |
| |
| rtnl_unlock(); |
| mutex_destroy(&adapter->fw_lock); |
| device_remove_file(&dev->dev, &dev_attr_failover); |
| free_netdev(netdev); |
| dev_set_drvdata(&dev->dev, NULL); |
| |
| return 0; |
| } |
| |
| static ssize_t failover_store(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct net_device *netdev = dev_get_drvdata(dev); |
| struct ibmvnic_adapter *adapter = netdev_priv(netdev); |
| unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; |
| __be64 session_token; |
| long rc; |
| |
| if (!sysfs_streq(buf, "1")) |
| return -EINVAL; |
| |
| rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, |
| H_GET_SESSION_TOKEN, 0, 0, 0); |
| if (rc) { |
| netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", |
| rc); |
| return -EINVAL; |
| } |
| |
| session_token = (__be64)retbuf[0]; |
| netdev_dbg(netdev, "Initiating client failover, session id %llx\n", |
| be64_to_cpu(session_token)); |
| rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, |
| H_SESSION_ERR_DETECTED, session_token, 0, 0); |
| if (rc) { |
| netdev_err(netdev, "Client initiated failover failed, rc %ld\n", |
| rc); |
| return -EINVAL; |
| } |
| |
| return count; |
| } |
| |
| static DEVICE_ATTR_WO(failover); |
| |
| 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 += 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 < adapter->num_active_rx_pools; 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); |
| |
| if (adapter->state != VNIC_OPEN) |
| return 0; |
| |
| tasklet_schedule(&adapter->tasklet); |
| |
| return 0; |
| } |
| |
| static const 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); |