diff options
Diffstat (limited to 'drivers/net/ethernet/ibm/ibmvnic.c')
| -rw-r--r-- | drivers/net/ethernet/ibm/ibmvnic.c | 3585 |
1 files changed, 3585 insertions, 0 deletions
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c new file mode 100644 index 000000000000..7d6570843723 --- /dev/null +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -0,0 +1,3585 @@ +/**************************************************************************/ +/* */ +/* IBM System i and System p Virtual NIC Device Driver */ +/* Copyright (C) 2014 IBM Corp. */ +/* Santiago Leon (santi_leon@yahoo.com) */ +/* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ +/* John Allen (jallen@linux.vnet.ibm.com) */ +/* */ +/* This program is free software; you can redistribute it and/or modify */ +/* it under the terms of the GNU General Public License as published by */ +/* the Free Software Foundation; either version 2 of the License, or */ +/* (at your option) any later version. */ +/* */ +/* This program is distributed in the hope that it will be useful, */ +/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ +/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ +/* GNU General Public License for more details. */ +/* */ +/* You should have received a copy of the GNU General Public License */ +/* along with this program. */ +/* */ +/* This module contains the implementation of a virtual ethernet device */ +/* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ +/* option of the RS/6000 Platform Architecture to interface with virtual */ +/* ethernet NICs that are presented to the partition by the hypervisor. */ +/* */ +/* Messages are passed between the VNIC driver and the VNIC server using */ +/* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ +/* issue and receive commands that initiate communication with the server */ +/* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ +/* are used by the driver to notify the server that a packet is */ +/* ready for transmission or that a buffer has been added to receive a */ +/* packet. Subsequently, sCRQs are used by the server to notify the */ +/* driver that a packet transmission has been completed or that a packet */ +/* has been received and placed in a waiting buffer. */ +/* */ +/* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ +/* which skbs are DMA mapped and immediately unmapped when the transmit */ +/* or receive has been completed, the VNIC driver is required to use */ +/* "long term mapping". This entails that large, continuous DMA mapped */ +/* buffers are allocated on driver initialization and these buffers are */ +/* then continuously reused to pass skbs to and from the VNIC server. */ +/* */ +/**************************************************************************/ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/completion.h> +#include <linux/ioport.h> +#include <linux/dma-mapping.h> +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/mm.h> +#include <linux/ethtool.h> +#include <linux/proc_fs.h> +#include <linux/in.h> +#include <linux/ip.h> +#include <linux/irq.h> +#include <linux/kthread.h> +#include <linux/seq_file.h> +#include <linux/debugfs.h> +#include <linux/interrupt.h> +#include <net/net_namespace.h> +#include <asm/hvcall.h> +#include <linux/atomic.h> +#include <asm/vio.h> +#include <asm/iommu.h> +#include <linux/uaccess.h> +#include <asm/firmware.h> +#include <linux/seq_file.h> + +#include "ibmvnic.h" + +static const char ibmvnic_driver_name[] = "ibmvnic"; +static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; + +MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>"); +MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(IBMVNIC_DRIVER_VERSION); + +static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; +static int ibmvnic_remove(struct vio_dev *); +static void release_sub_crqs(struct ibmvnic_adapter *); +static 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 irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); +static int enable_scrq_irq(struct ibmvnic_adapter *, + struct ibmvnic_sub_crq_queue *); +static int disable_scrq_irq(struct ibmvnic_adapter *, + struct ibmvnic_sub_crq_queue *); +static int pending_scrq(struct ibmvnic_adapter *, + struct ibmvnic_sub_crq_queue *); +static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, + struct ibmvnic_sub_crq_queue *); +static int ibmvnic_poll(struct napi_struct *napi, int data); +static void send_map_query(struct ibmvnic_adapter *adapter); +static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); +static void send_request_unmap(struct ibmvnic_adapter *, u8); + +struct ibmvnic_stat { + char name[ETH_GSTRING_LEN]; + int offset; +}; + +#define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ + offsetof(struct ibmvnic_statistics, stat)) +#define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) + +static const struct ibmvnic_stat ibmvnic_stats[] = { + {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, + {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, + {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, + {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, + {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, + {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, + {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, + {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, + {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, + {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, + {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, + {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, + {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, + {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, + {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, + {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, + {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, + {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, + {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, + {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, + {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, + {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, +}; + +static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, + unsigned long length, unsigned long *number, + unsigned long *irq) +{ + unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; + long rc; + + rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); + *number = retbuf[0]; + *irq = retbuf[1]; + + return rc; +} + +/* net_device_ops functions */ + +static void init_rx_pool(struct ibmvnic_adapter *adapter, + struct ibmvnic_rx_pool *rx_pool, int num, int index, + int buff_size, int active) +{ + netdev_dbg(adapter->netdev, + "Initializing rx_pool %d, %d buffs, %d bytes each\n", + index, num, buff_size); + rx_pool->size = num; + rx_pool->index = index; + rx_pool->buff_size = buff_size; + rx_pool->active = active; +} + +static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, + struct ibmvnic_long_term_buff *ltb, int size) +{ + struct device *dev = &adapter->vdev->dev; + + ltb->size = size; + ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, + GFP_KERNEL); + + if (!ltb->buff) { + dev_err(dev, "Couldn't alloc long term buffer\n"); + return -ENOMEM; + } + ltb->map_id = adapter->map_id; + adapter->map_id++; + send_request_map(adapter, ltb->addr, + ltb->size, ltb->map_id); + init_completion(&adapter->fw_done); + wait_for_completion(&adapter->fw_done); + return 0; +} + +static void free_long_term_buff(struct ibmvnic_adapter *adapter, + struct ibmvnic_long_term_buff *ltb) +{ + struct device *dev = &adapter->vdev->dev; + + dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); + send_request_unmap(adapter, ltb->map_id); +} + +static int alloc_rx_pool(struct ibmvnic_adapter *adapter, + struct ibmvnic_rx_pool *pool) +{ + struct device *dev = &adapter->vdev->dev; + int i; + + pool->free_map = kcalloc(pool->size, sizeof(int), GFP_KERNEL); + if (!pool->free_map) + return -ENOMEM; + + pool->rx_buff = kcalloc(pool->size, sizeof(struct ibmvnic_rx_buff), + GFP_KERNEL); + + if (!pool->rx_buff) { + dev_err(dev, "Couldn't alloc rx buffers\n"); + kfree(pool->free_map); + return -ENOMEM; + } + + if (alloc_long_term_buff(adapter, &pool->long_term_buff, + pool->size * pool->buff_size)) { + kfree(pool->free_map); + kfree(pool->rx_buff); + return -ENOMEM; + } + + for (i = 0; i < pool->size; ++i) + pool->free_map[i] = i; + + atomic_set(&pool->available, 0); + pool->next_alloc = 0; + pool->next_free = 0; + + return 0; +} + +static void replenish_rx_pool(struct ibmvnic_adapter *adapter, + struct ibmvnic_rx_pool *pool) +{ + int count = pool->size - atomic_read(&pool->available); + struct device *dev = &adapter->vdev->dev; + int buffers_added = 0; + unsigned long lpar_rc; + union sub_crq sub_crq; + struct sk_buff *skb; + unsigned int offset; + dma_addr_t dma_addr; + unsigned char *dst; + u64 *handle_array; + int shift = 0; + int index; + int i; + + handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + + be32_to_cpu(adapter->login_rsp_buf-> + off_rxadd_subcrqs)); + + for (i = 0; i < count; ++i) { + skb = alloc_skb(pool->buff_size, GFP_ATOMIC); + if (!skb) { + dev_err(dev, "Couldn't replenish rx buff\n"); + adapter->replenish_no_mem++; + break; + } + + index = pool->free_map[pool->next_free]; + + if (pool->rx_buff[index].skb) + dev_err(dev, "Inconsistent free_map!\n"); + + /* Copy the skb to the long term mapped DMA buffer */ + offset = index * pool->buff_size; + dst = pool->long_term_buff.buff + offset; + memset(dst, 0, pool->buff_size); + dma_addr = pool->long_term_buff.addr + offset; + pool->rx_buff[index].data = dst; + + pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; + pool->rx_buff[index].dma = dma_addr; + pool->rx_buff[index].skb = skb; + pool->rx_buff[index].pool_index = pool->index; + pool->rx_buff[index].size = pool->buff_size; + + memset(&sub_crq, 0, sizeof(sub_crq)); + sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; + sub_crq.rx_add.correlator = + cpu_to_be64((u64)&pool->rx_buff[index]); + sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); + sub_crq.rx_add.map_id = pool->long_term_buff.map_id; + + /* The length field of the sCRQ is defined to be 24 bits so the + * buffer size needs to be left shifted by a byte before it is + * converted to big endian to prevent the last byte from being + * truncated. + */ +#ifdef __LITTLE_ENDIAN__ + shift = 8; +#endif + sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); + + lpar_rc = send_subcrq(adapter, handle_array[pool->index], + &sub_crq); + if (lpar_rc != H_SUCCESS) + goto failure; + + buffers_added++; + adapter->replenish_add_buff_success++; + pool->next_free = (pool->next_free + 1) % pool->size; + } + atomic_add(buffers_added, &pool->available); + return; + +failure: + dev_info(dev, "replenish pools failure\n"); + pool->free_map[pool->next_free] = index; + pool->rx_buff[index].skb = NULL; + if (!dma_mapping_error(dev, dma_addr)) + dma_unmap_single(dev, dma_addr, pool->buff_size, + DMA_FROM_DEVICE); + + dev_kfree_skb_any(skb); + adapter->replenish_add_buff_failure++; + atomic_add(buffers_added, &pool->available); +} + +static void replenish_pools(struct ibmvnic_adapter *adapter) +{ + int i; + + if (adapter->migrated) + return; + + adapter->replenish_task_cycles++; + for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); + i++) { + if (adapter->rx_pool[i].active) + replenish_rx_pool(adapter, &adapter->rx_pool[i]); + } +} + +static void free_rx_pool(struct ibmvnic_adapter *adapter, + struct ibmvnic_rx_pool *pool) +{ + int i; + + kfree(pool->free_map); + pool->free_map = NULL; + + if (!pool->rx_buff) + return; + + for (i = 0; i < pool->size; i++) { + if (pool->rx_buff[i].skb) { + dev_kfree_skb_any(pool->rx_buff[i].skb); + pool->rx_buff[i].skb = NULL; + } + } + kfree(pool->rx_buff); + pool->rx_buff = NULL; +} + +static int ibmvnic_open(struct net_device *netdev) +{ + struct ibmvnic_adapter *adapter = netdev_priv(netdev); + struct device *dev = &adapter->vdev->dev; + struct ibmvnic_tx_pool *tx_pool; + union ibmvnic_crq crq; + int rxadd_subcrqs; + u64 *size_array; + int tx_subcrqs; + int i, j; + + rxadd_subcrqs = + be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); + tx_subcrqs = + be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); + size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + + be32_to_cpu(adapter->login_rsp_buf-> + off_rxadd_buff_size)); + adapter->map_id = 1; + adapter->napi = kcalloc(adapter->req_rx_queues, + sizeof(struct napi_struct), GFP_KERNEL); + if (!adapter->napi) + goto alloc_napi_failed; + for (i = 0; i < adapter->req_rx_queues; i++) { + netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll, + NAPI_POLL_WEIGHT); + napi_enable(&adapter->napi[i]); + } + adapter->rx_pool = + kcalloc(rxadd_subcrqs, sizeof(struct ibmvnic_rx_pool), GFP_KERNEL); + + if (!adapter->rx_pool) + goto rx_pool_arr_alloc_failed; + send_map_query(adapter); + for (i = 0; i < rxadd_subcrqs; i++) { + init_rx_pool(adapter, &adapter->rx_pool[i], + IBMVNIC_BUFFS_PER_POOL, i, + be64_to_cpu(size_array[i]), 1); + if (alloc_rx_pool(adapter, &adapter->rx_pool[i])) { + dev_err(dev, "Couldn't alloc rx pool\n"); + goto rx_pool_alloc_failed; + } + } + adapter->tx_pool = + kcalloc(tx_subcrqs, sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); + + if (!adapter->tx_pool) + goto tx_pool_arr_alloc_failed; + for (i = 0; i < tx_subcrqs; i++) { + tx_pool = &adapter->tx_pool[i]; + tx_pool->tx_buff = + kcalloc(adapter->max_tx_entries_per_subcrq, + sizeof(struct ibmvnic_tx_buff), GFP_KERNEL); + if (!tx_pool->tx_buff) + goto tx_pool_alloc_failed; + + if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, + adapter->max_tx_entries_per_subcrq * + adapter->req_mtu)) + goto tx_ltb_alloc_failed; + + tx_pool->free_map = + kcalloc(adapter->max_tx_entries_per_subcrq, + sizeof(int), GFP_KERNEL); + if (!tx_pool->free_map) + goto tx_fm_alloc_failed; + + for (j = 0; j < adapter->max_tx_entries_per_subcrq; j++) + tx_pool->free_map[j] = j; + + tx_pool->consumer_index = 0; + tx_pool->producer_index = 0; + } + adapter->bounce_buffer_size = + (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1; + adapter->bounce_buffer = kmalloc(adapter->bounce_buffer_size, + GFP_KERNEL); + if (!adapter->bounce_buffer) + goto bounce_alloc_failed; + + adapter->bounce_buffer_dma = dma_map_single(dev, adapter->bounce_buffer, + adapter->bounce_buffer_size, + DMA_TO_DEVICE); + if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) { + dev_err(dev, "Couldn't map tx bounce buffer\n"); + goto bounce_map_failed; + } + replenish_pools(adapter); + + /* We're ready to receive frames, enable the sub-crq interrupts and + * set the logical link state to up + */ + for (i = 0; i < adapter->req_rx_queues; i++) + enable_scrq_irq(adapter, adapter->rx_scrq[i]); + + for (i = 0; i < adapter->req_tx_queues; i++) + enable_scrq_irq(adapter, adapter->tx_scrq[i]); + + memset(&crq, 0, sizeof(crq)); + crq.logical_link_state.first = IBMVNIC_CRQ_CMD; + crq.logical_link_state.cmd = LOGICAL_LINK_STATE; + crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_UP; + ibmvnic_send_crq(adapter, &crq); + + netif_start_queue(netdev); + return 0; + +bounce_map_failed: + kfree(adapter->bounce_buffer); +bounce_alloc_failed: + i = tx_subcrqs - 1; + kfree(adapter->tx_pool[i].free_map); +tx_fm_alloc_failed: + free_long_term_buff(adapter, &adapter->tx_pool[i].long_term_buff); +tx_ltb_alloc_failed: + kfree(adapter->tx_pool[i].tx_buff); +tx_pool_alloc_failed: + for (j = 0; j < i; j++) { + kfree(adapter->tx_pool[j].tx_buff); + free_long_term_buff(adapter, + &adapter->tx_pool[j].long_term_buff); + kfree(adapter->tx_pool[j].free_map); + } + kfree(adapter->tx_pool); + adapter->tx_pool = NULL; +tx_pool_arr_alloc_failed: + i = rxadd_subcrqs; +rx_pool_alloc_failed: + for (j = 0; j < i; j++) { + free_rx_pool(adapter, &adapter->rx_pool[j]); + free_long_term_buff(adapter, + &adapter->rx_pool[j].long_term_buff); + } + kfree(adapter->rx_pool); + adapter->rx_pool = NULL; +rx_pool_arr_alloc_failed: + for (i = 0; i < adapter->req_rx_queues; i++) + napi_enable(&adapter->napi[i]); +alloc_napi_failed: + return -ENOMEM; +} + +static int ibmvnic_close(struct net_device *netdev) +{ + struct ibmvnic_adapter *adapter = netdev_priv(netdev); + struct device *dev = &adapter->vdev->dev; + union ibmvnic_crq crq; + int i; + + adapter->closing = true; + + for (i = 0; i < adapter->req_rx_queues; i++) + napi_disable(&adapter->napi[i]); + + netif_stop_queue(netdev); + + if (adapter->bounce_buffer) { + if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) { + dma_unmap_single(&adapter->vdev->dev, + adapter->bounce_buffer_dma, + adapter->bounce_buffer_size, + DMA_BIDIRECTIONAL); + adapter->bounce_buffer_dma = DMA_ERROR_CODE; + } + kfree(adapter->bounce_buffer); + adapter->bounce_buffer = NULL; + } + + memset(&crq, 0, sizeof(crq)); + crq.logical_link_state.first = IBMVNIC_CRQ_CMD; + crq.logical_link_state.cmd = LOGICAL_LINK_STATE; + crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_DN; + ibmvnic_send_crq(adapter, &crq); + + for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); + i++) { + kfree(adapter->tx_pool[i].tx_buff); + free_long_term_buff(adapter, + &adapter->tx_pool[i].long_term_buff); + kfree(adapter->tx_pool[i].free_map); + } + kfree(adapter->tx_pool); + adapter->tx_pool = NULL; + + for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); + i++) { + free_rx_pool(adapter, &adapter->rx_pool[i]); + free_long_term_buff(adapter, + &adapter->rx_pool[i].long_term_buff); + } + kfree(adapter->rx_pool); + adapter->rx_pool = NULL; + + adapter->closing = false; + + return 0; +} + +static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) +{ + struct ibmvnic_adapter *adapter = netdev_priv(netdev); + int queue_num = skb_get_queue_mapping(skb); + struct device *dev = &adapter->vdev->dev; + struct ibmvnic_tx_buff *tx_buff = NULL; + struct ibmvnic_tx_pool *tx_pool; + unsigned int tx_send_failed = 0; + unsigned int tx_map_failed = 0; + unsigned int tx_dropped = 0; + unsigned int tx_packets = 0; + unsigned int tx_bytes = 0; + dma_addr_t data_dma_addr; + struct netdev_queue *txq; + bool used_bounce = false; + unsigned long lpar_rc; + union sub_crq tx_crq; + unsigned int offset; + unsigned char *dst; + u64 *handle_array; + int index = 0; + int ret = 0; + + tx_pool = &adapter->tx_pool[queue_num]; + txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); + handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + + be32_to_cpu(adapter->login_rsp_buf-> + off_txsubm_subcrqs)); + if (adapter->migrated) { + tx_send_failed++; + tx_dropped++; + ret = NETDEV_TX_BUSY; + goto out; + } + + index = tx_pool->free_map[tx_pool->consumer_index]; + offset = index * adapter->req_mtu; + dst = tx_pool->long_term_buff.buff + offset; + memset(dst, 0, adapter->req_mtu); + skb_copy_from_linear_data(skb, dst, skb->len); + data_dma_addr = tx_pool->long_term_buff.addr + offset; + + tx_pool->consumer_index = + (tx_pool->consumer_index + 1) % + adapter->max_tx_entries_per_subcrq; + + tx_buff = &tx_pool->tx_buff[index]; + tx_buff->skb = skb; + tx_buff->data_dma[0] = data_dma_addr; + tx_buff->data_len[0] = skb->len; + tx_buff->index = index; + tx_buff->pool_index = queue_num; + tx_buff->last_frag = true; + tx_buff->used_bounce = used_bounce; + + memset(&tx_crq, 0, sizeof(tx_crq)); + tx_crq.v1.first = IBMVNIC_CRQ_CMD; + tx_crq.v1.type = IBMVNIC_TX_DESC; + tx_crq.v1.n_crq_elem = 1; + tx_crq.v1.n_sge = 1; + tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; + tx_crq.v1.correlator = cpu_to_be32(index); + tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); + tx_crq.v1.sge_len = cpu_to_be32(skb->len); + tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); + + if (adapter->vlan_header_insertion) { + tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; + tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); + } + + if (skb->protocol == htons(ETH_P_IP)) { + if (ip_hdr(skb)->version == 4) + tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; + else if (ip_hdr(skb)->version == 6) + tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; + + if (ip_hdr(skb)->protocol == IPPROTO_TCP) + tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; + else if (ip_hdr(skb)->protocol != IPPROTO_TCP) + tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; + } + + if (skb->ip_summed == CHECKSUM_PARTIAL) + tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; + + lpar_rc = send_subcrq(adapter, handle_array[0], &tx_crq); + + if (lpar_rc != H_SUCCESS) { + dev_err(dev, "tx failed with code %ld\n", lpar_rc); + + if (tx_pool->consumer_index == 0) + tx_pool->consumer_index = + adapter->max_tx_entries_per_subcrq - 1; + else + tx_pool->consumer_index--; + + tx_send_failed++; + tx_dropped++; + ret = NETDEV_TX_BUSY; + goto out; + } + tx_packets++; + tx_bytes += skb->len; + txq->trans_start = jiffies; + ret = NETDEV_TX_OK; + +out: + netdev->stats.tx_dropped += tx_dropped; + netdev->stats.tx_bytes += tx_bytes; + netdev->stats.tx_packets += tx_packets; + adapter->tx_send_failed += tx_send_failed; + adapter->tx_map_failed += tx_map_failed; + + return ret; +} + +static void ibmvnic_set_multi(struct net_device *netdev) +{ + struct ibmvnic_adapter *adapter = netdev_priv(netdev); + struct netdev_hw_addr *ha; + union ibmvnic_crq crq; + + memset(&crq, 0, sizeof(crq)); + crq.request_capability.first = IBMVNIC_CRQ_CMD; + crq.request_capability.cmd = REQUEST_CAPABILITY; + + if (netdev->flags & IFF_PROMISC) { + if (!adapter->promisc_supported) + return; + } else { + if (netdev->flags & IFF_ALLMULTI) { + /* Accept all multicast */ + memset(&crq, 0, sizeof(crq)); + crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; + crq.multicast_ctrl.cmd = MULTICAST_CTRL; + crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; + ibmvnic_send_crq(adapter, &crq); + } else if (netdev_mc_empty(netdev)) { + /* Reject all multicast */ + memset(&crq, 0, sizeof(crq)); + crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; + crq.multicast_ctrl.cmd = MULTICAST_CTRL; + crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; + ibmvnic_send_crq(adapter, &crq); + } else { + /* Accept one or more multicast(s) */ + netdev_for_each_mc_addr(ha, netdev) { + memset(&crq, 0, sizeof(crq)); + crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; + crq.multicast_ctrl.cmd = MULTICAST_CTRL; + crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; + ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], + ha->addr); + ibmvnic_send_crq(adapter, &crq); + } + } + } +} + +static int ibmvnic_set_mac(struct net_device *netdev, void *p) +{ + struct ibmvnic_adapter *adapter = netdev_priv(netdev); + struct sockaddr *addr = p; + union ibmvnic_crq crq; + + if (!is_valid_ether_addr(addr->sa_data)) + return -EADDRNOTAVAIL; + + memset(&crq, 0, sizeof(crq)); + crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; + crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; + ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data); + ibmvnic_send_crq(adapter, &crq); + /* netdev->dev_addr is changed in handle_change_mac_rsp function */ + return 0; +} + +static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) +{ + struct ibmvnic_adapter *adapter = netdev_priv(netdev); + + if (new_mtu > adapter->req_mtu || new_mtu < adapter->min_mtu) + return -EINVAL; + + netdev->mtu = new_mtu; + return 0; +} + +static void ibmvnic_tx_timeout(struct net_device *dev) +{ + struct ibmvnic_adapter *adapter = netdev_priv(dev); + int rc; + + /* Adapter timed out, resetting it */ + release_sub_crqs(adapter); + rc = ibmvnic_reset_crq(adapter); + if (rc) + dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n"); + else + ibmvnic_send_crq_init(adapter); +} + +static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, + struct ibmvnic_rx_buff *rx_buff) +{ + struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; + + rx_buff->skb = NULL; + + pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); + pool->next_alloc = (pool->next_alloc + 1) % pool->size; + + atomic_dec(&pool->available); +} + +static int ibmvnic_poll(struct napi_struct *napi, int budget) +{ + struct net_device *netdev = napi->dev; + struct ibmvnic_adapter *adapter = netdev_priv(netdev); + int scrq_num = (int)(napi - adapter->napi); + int frames_processed = 0; +restart_poll: + while (frames_processed < budget) { + struct sk_buff *skb; + struct ibmvnic_rx_buff *rx_buff; + union sub_crq *next; + u32 length; + u16 offset; + u8 flags = 0; + + if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) + break; + next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); + rx_buff = + (struct ibmvnic_rx_buff *)be64_to_cpu(next-> + rx_comp.correlator); + /* do error checking */ + if (next->rx_comp.rc) { + netdev_err(netdev, "rx error %x\n", next->rx_comp.rc); + /* free the entry */ + next->rx_comp.first = 0; + remove_buff_from_pool(adapter, rx_buff); + break; + } + + length = be32_to_cpu(next->rx_comp.len); + offset = be16_to_cpu(next->rx_comp.off_frame_data); + flags = next->rx_comp.flags; + skb = rx_buff->skb; + skb_copy_to_linear_data(skb, rx_buff->data + offset, + length); + skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci); + /* free the entry */ + next->rx_comp.first = 0; + remove_buff_from_pool(adapter, rx_buff); + + skb_put(skb, length); + skb->protocol = eth_type_trans(skb, netdev); + + if (flags & IBMVNIC_IP_CHKSUM_GOOD && + flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { + skb->ip_summed = CHECKSUM_UNNECESSARY; + } + + length = skb->len; + napi_gro_receive(napi, skb); /* send it up */ + netdev->stats.rx_packets++; + netdev->stats.rx_bytes += length; + frames_processed++; + } + replenish_pools(adapter); + + if (frames_processed < budget) { + enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); + napi_complete(napi); + if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && + napi_reschedule(napi)) { + disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); + goto restart_poll; + } + } + return frames_processed; +} + +#ifdef CONFIG_NET_POLL_CONTROLLER +static void ibmvnic_netpoll_controller(struct net_device *dev) +{ + struct ibmvnic_adapter *adapter = netdev_priv(dev); + int i; + + replenish_pools(netdev_priv(dev)); + for (i = 0; i < adapter->req_rx_queues; i++) + ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, + adapter->rx_scrq[i]); +} +#endif + +static const struct net_device_ops ibmvnic_netdev_ops = { + .ndo_open = ibmvnic_open, + .ndo_stop = ibmvnic_close, + .ndo_start_xmit = ibmvnic_xmit, + .ndo_set_rx_mode = ibmvnic_set_multi, + .ndo_set_mac_address = ibmvnic_set_mac, + .ndo_validate_addr = eth_validate_addr, + .ndo_change_mtu = ibmvnic_change_mtu, + .ndo_tx_timeout = ibmvnic_tx_timeout, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = ibmvnic_netpoll_controller, +#endif +}; + +/* ethtool functions */ + +static int ibmvnic_get_settings(struct net_device *netdev, + struct ethtool_cmd *cmd) +{ + cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | + SUPPORTED_FIBRE); + cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | + ADVERTISED_FIBRE); + ethtool_cmd_speed_set(cmd, SPEED_1000); + cmd->duplex = DUPLEX_FULL; + cmd->port = PORT_FIBRE; + cmd->phy_address = 0; + cmd->transceiver = XCVR_INTERNAL; + cmd->autoneg = AUTONEG_ENABLE; + cmd->maxtxpkt = 0; + cmd->maxrxpkt = 1; + return 0; +} + +static void ibmvnic_get_drvinfo(struct net_device *dev, + struct ethtool_drvinfo *info) +{ + strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); + strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); +} + +static u32 ibmvnic_get_msglevel(struct net_device *netdev) +{ + struct ibmvnic_adapter *adapter = netdev_priv(netdev); + + return adapter->msg_enable; +} + +static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) +{ + struct ibmvnic_adapter *adapter = netdev_priv(netdev); + + adapter->msg_enable = data; +} + +static u32 ibmvnic_get_link(struct net_device *netdev) +{ + struct ibmvnic_adapter *adapter = netdev_priv(netdev); + + /* Don't need to send a query because we request a logical link up at + * init and then we wait for link state indications + */ + return adapter->logical_link_state; +} + +static void ibmvnic_get_ringparam(struct net_device *netdev, + struct ethtool_ringparam *ring) +{ + ring->rx_max_pending = 0; + ring->tx_max_pending = 0; + ring->rx_mini_max_pending = 0; + ring->rx_jumbo_max_pending = 0; + ring->rx_pending = 0; + ring->tx_pending = 0; + ring->rx_mini_pending = 0; + ring->rx_jumbo_pending = 0; +} + +static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) +{ + int i; + + if (stringset != ETH_SS_STATS) + return; + + for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) + memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); +} + +static int ibmvnic_get_sset_count(struct net_device *dev, int sset) +{ + switch (sset) { + case ETH_SS_STATS: + return ARRAY_SIZE(ibmvnic_stats); + default: + return -EOPNOTSUPP; + } +} + +static void ibmvnic_get_ethtool_stats(struct net_device *dev, + struct ethtool_stats *stats, u64 *data) +{ + struct ibmvnic_adapter *adapter = netdev_priv(dev); + union ibmvnic_crq crq; + int i; + + memset(&crq, 0, sizeof(crq)); + crq.request_statistics.first = IBMVNIC_CRQ_CMD; + crq.request_statistics.cmd = REQUEST_STATISTICS; + crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); + crq.request_statistics.len = + cpu_to_be32(sizeof(struct ibmvnic_statistics)); + ibmvnic_send_crq(adapter, &crq); + + /* Wait for data to be written */ + init_completion(&adapter->stats_done); + wait_for_completion(&adapter->stats_done); + + for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) + data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset); +} + +static const struct ethtool_ops ibmvnic_ethtool_ops = { + .get_settings = ibmvnic_get_settings, + .get_drvinfo = ibmvnic_get_drvinfo, + .get_msglevel = ibmvnic_get_msglevel, + .set_msglevel = ibmvnic_set_msglevel, + .get_link = ibmvnic_get_link, + .get_ringparam = ibmvnic_get_ringparam, + .get_strings = ibmvnic_get_strings, + .get_sset_count = ibmvnic_get_sset_count, + .get_ethtool_stats = ibmvnic_get_ethtool_stats, +}; + +/* Routines for managing CRQs/sCRQs */ + +static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, + struct ibmvnic_sub_crq_queue *scrq) +{ + struct device *dev = &adapter->vdev->dev; + long rc; + + netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); + + /* Close the sub-crqs */ + do { + rc = plpar_hcall_norets(H_FREE_SUB_CRQ, + adapter->vdev->unit_address, + scrq->crq_num); + } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); + + dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, + DMA_BIDIRECTIONAL); + free_pages((unsigned long)scrq->msgs, 2); + kfree(scrq); +} + +static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter + *adapter) +{ + struct device *dev = &adapter->vdev->dev; + struct ibmvnic_sub_crq_queue *scrq; + int rc; + + scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC); + if (!scrq) + return NULL; + + scrq->msgs = (union sub_crq *)__get_free_pages(GFP_KERNEL, 2); + memset(scrq->msgs, 0, 4 * PAGE_SIZE); + if (!scrq->msgs) { + dev_warn(dev, "Couldn't allocate crq queue messages page\n"); + goto zero_page_failed; + } + + scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, + DMA_BIDIRECTIONAL); + if (dma_mapping_error(dev, scrq->msg_token)) { + dev_warn(dev, "Couldn't map crq queue messages page\n"); + goto map_failed; + } + + rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, + 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); + + if (rc == H_RESOURCE) + rc = ibmvnic_reset_crq(adapter); + + if (rc == H_CLOSED) { + dev_warn(dev, "Partner adapter not ready, waiting.\n"); + } else if (rc) { + dev_warn(dev, "Error %d registering sub-crq\n", rc); + goto reg_failed; + } + + scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); + if (scrq->irq == NO_IRQ) { + dev_err(dev, "Error mapping irq\n"); + goto map_irq_failed; + } + + scrq->adapter = adapter; + scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); + scrq->cur = 0; + scrq->rx_skb_top = NULL; + spin_lock_init(&scrq->lock); + + netdev_dbg(adapter->netdev, + "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", + scrq->crq_num, scrq->hw_irq, scrq->irq); + + return scrq; + +map_irq_failed: + 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)); +reg_failed: + dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, + DMA_BIDIRECTIONAL); +map_failed: + free_pages((unsigned long)scrq->msgs, 2); +zero_page_failed: + kfree(scrq); + + return NULL; +} + +static void release_sub_crqs(struct ibmvnic_adapter *adapter) +{ + int i; + + if (adapter->tx_scrq) { + for (i = 0; i < adapter->req_tx_queues; i++) + if (adapter->tx_scrq[i]) { + free_irq(adapter->tx_scrq[i]->irq, + adapter->tx_scrq[i]); + release_sub_crq_queue(adapter, + adapter->tx_scrq[i]); + } + adapter->tx_scrq = NULL; + } + + if (adapter->rx_scrq) { + for (i = 0; i < adapter->req_rx_queues; i++) + if (adapter->rx_scrq[i]) { + free_irq(adapter->rx_scrq[i]->irq, + adapter->rx_scrq[i]); + release_sub_crq_queue(adapter, + adapter->rx_scrq[i]); + } + adapter->rx_scrq = NULL; + } + + adapter->requested_caps = 0; +} + +static int disable_scrq_irq(struct ibmvnic_adapter *adapter, + struct ibmvnic_sub_crq_queue *scrq) +{ + struct device *dev = &adapter->vdev->dev; + unsigned long rc; + + rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, + H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); + if (rc) + dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", + scrq->hw_irq, rc); + return rc; +} + +static int enable_scrq_irq(struct ibmvnic_adapter *adapter, + struct ibmvnic_sub_crq_queue *scrq) +{ + struct device *dev = &adapter->vdev->dev; + unsigned long rc; + + if (scrq->hw_irq > 0x100000000ULL) { + dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); + return 1; + } + + rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, + H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); + if (rc) + dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", + scrq->hw_irq, rc); + return rc; +} + +static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, + struct ibmvnic_sub_crq_queue *scrq) +{ + struct device *dev = &adapter->vdev->dev; + struct ibmvnic_tx_buff *txbuff; + union sub_crq *next; + int index; + int i, j; + +restart_loop: + while (pending_scrq(adapter, scrq)) { + unsigned int pool = scrq->pool_index; + + next = ibmvnic_next_scrq(adapter, scrq); + for (i = 0; i < next->tx_comp.num_comps; i++) { + if (next->tx_comp.rcs[i]) { + dev_err(dev, "tx error %x\n", + next->tx_comp.rcs[i]); + continue; + } + index = be32_to_cpu(next->tx_comp.correlators[i]); + txbuff = &adapter->tx_pool[pool].tx_buff[index]; + + for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { + if (!txbuff->data_dma[j]) + continue; + + txbuff->data_dma[j] = 0; + txbuff->used_bounce = false; + } + + if (txbuff->last_frag) + dev_kfree_skb_any(txbuff->skb); + + adapter->tx_pool[pool].free_map[adapter->tx_pool[pool]. + producer_index] = index; + adapter->tx_pool[pool].producer_index = + (adapter->tx_pool[pool].producer_index + 1) % + adapter->max_tx_entries_per_subcrq; + } + /* remove tx_comp scrq*/ + next->tx_comp.first = 0; + } + + enable_scrq_irq(adapter, scrq); + + if (pending_scrq(adapter, scrq)) { + disable_scrq_irq(adapter, scrq); + goto restart_loop; + } + + return 0; +} + +static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) +{ + struct ibmvnic_sub_crq_queue *scrq = instance; + struct ibmvnic_adapter *adapter = scrq->adapter; + + disable_scrq_irq(adapter, scrq); + ibmvnic_complete_tx(adapter, scrq); + + return IRQ_HANDLED; +} + +static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) +{ + struct ibmvnic_sub_crq_queue *scrq = instance; + struct ibmvnic_adapter *adapter = scrq->adapter; + + if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { + disable_scrq_irq(adapter, scrq); + __napi_schedule(&adapter->napi[scrq->scrq_num]); + } + + return IRQ_HANDLED; +} + +static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry) +{ + struct device *dev = &adapter->vdev->dev; + struct ibmvnic_sub_crq_queue **allqueues; + int registered_queues = 0; + union ibmvnic_crq crq; + int total_queues; + int more = 0; + int i, j; + int rc; + + if (!retry) { + /* Sub-CRQ entries are 32 byte long */ + int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); + + if (adapter->min_tx_entries_per_subcrq > entries_page || + adapter->min_rx_add_entries_per_subcrq > entries_page) { + dev_err(dev, "Fatal, invalid entries per sub-crq\n"); + goto allqueues_failed; + } + + /* Get the minimum between the queried max and the entries + * that fit in our PAGE_SIZE + */ + adapter->req_tx_entries_per_subcrq = + adapter->max_tx_entries_per_subcrq > entries_page ? + entries_page : adapter->max_tx_entries_per_subcrq; + adapter->req_rx_add_entries_per_subcrq = + adapter->max_rx_add_entries_per_subcrq > entries_page ? + entries_page : adapter->max_rx_add_entries_per_subcrq; + + /* Choosing the maximum number of queues supported by firmware*/ + adapter->req_tx_queues = adapter->min_tx_queues; + adapter->req_rx_queues = adapter->min_rx_queues; + adapter->req_rx_add_queues = adapter->min_rx_add_queues; + + adapter->req_mtu = adapter->max_mtu; + } + + total_queues = adapter->req_tx_queues + adapter->req_rx_queues; + + allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC); + if (!allqueues) + goto allqueues_failed; + + for (i = 0; i < total_queues; i++) { + allqueues[i] = init_sub_crq_queue(adapter); + if (!allqueues[i]) { + dev_warn(dev, "Couldn't allocate all sub-crqs\n"); + break; + } + registered_queues++; + } + + /* Make sure we were able to register the minimum number of queues */ + if (registered_queues < + adapter->min_tx_queues + adapter->min_rx_queues) { + dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); + goto tx_failed; + } + + /* Distribute the failed allocated queues*/ + for (i = 0; i < total_queues - registered_queues + more ; i++) { + netdev_dbg(adapter->netdev, "Reducing number of queues\n"); + switch (i % 3) { + case 0: + if (adapter->req_rx_queues > adapter->min_rx_queues) + adapter->req_rx_queues--; + else + more++; + break; + case 1: + if (adapter->req_tx_queues > adapter->min_tx_queues) + adapter->req_tx_queues--; + else + more++; + break; + } + } + + adapter->tx_scrq = kcalloc(adapter->req_tx_queues, + sizeof(*adapter->tx_scrq), GFP_ATOMIC); + if (!adapter->tx_scrq) + goto tx_failed; + + for (i = 0; i < adapter->req_tx_queues; i++) { + adapter->tx_scrq[i] = allqueues[i]; + adapter->tx_scrq[i]->pool_index = i; + rc = request_irq(adapter->tx_scrq[i]->irq, ibmvnic_interrupt_tx, + 0, "ibmvnic_tx", adapter->tx_scrq[i]); + if (rc) { + dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", + adapter->tx_scrq[i]->irq, rc); + goto req_tx_irq_failed; + } + } + + adapter->rx_scrq = kcalloc(adapter->req_rx_queues, + sizeof(*adapter->rx_scrq), GFP_ATOMIC); + if (!adapter->rx_scrq) + goto rx_failed; + + for (i = 0; i < adapter->req_rx_queues; i++) { + adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; + adapter->rx_scrq[i]->scrq_num = i; + rc = request_irq(adapter->rx_scrq[i]->irq, ibmvnic_interrupt_rx, + 0, "ibmvnic_rx", adapter->rx_scrq[i]); + if (rc) { + dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", + adapter->rx_scrq[i]->irq, rc); + goto req_rx_irq_failed; + } + } + + 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_be32(adapter->req_tx_queues); + ibmvnic_send_crq(adapter, &crq); + + crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); + crq.request_capability.number = cpu_to_be32(adapter->req_rx_queues); + ibmvnic_send_crq(adapter, &crq); + + crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); + crq.request_capability.number = cpu_to_be32(adapter->req_rx_add_queues); + ibmvnic_send_crq(adapter, &crq); + + crq.request_capability.capability = + cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); + crq.request_capability.number = + cpu_to_be32(adapter->req_tx_entries_per_subcrq); + ibmvnic_send_crq(adapter, &crq); + + crq.request_capability.capability = + cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); + crq.request_capability.number = + cpu_to_be32(adapter->req_rx_add_entries_per_subcrq); + ibmvnic_send_crq(adapter, &crq); + + crq.request_capability.capability = cpu_to_be16(REQ_MTU); + crq.request_capability.number = cpu_to_be32(adapter->req_mtu); + ibmvnic_send_crq(adapter, &crq); + + if (adapter->netdev->flags & IFF_PROMISC) { + if (adapter->promisc_supported) { + crq.request_capability.capability = + cpu_to_be16(PROMISC_REQUESTED); + crq.request_capability.number = cpu_to_be32(1); + ibmvnic_send_crq(adapter, &crq); + } + } else { + crq.request_capability.capability = + cpu_to_be16(PROMISC_REQUESTED); + crq.request_capability.number = cpu_to_be32(0); + ibmvnic_send_crq(adapter, &crq); + } + + kfree(allqueues); + + return; + +req_rx_irq_failed: + for (j = 0; j < i; j++) + free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); + 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]); + kfree(adapter->rx_scrq); + adapter->rx_scrq = NULL; +rx_failed: + kfree(adapter->tx_scrq); + adapter->tx_scrq = NULL; +tx_failed: + for (i = 0; i < registered_queues; i++) + release_sub_crq_queue(adapter, allqueues[i]); + kfree(allqueues); +allqueues_failed: + ibmvnic_remove(adapter->vdev); +} + +static int pending_scrq(struct ibmvnic_adapter *adapter, + struct ibmvnic_sub_crq_queue *scrq) +{ + union sub_crq *entry = &scrq->msgs[scrq->cur]; + + if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing) + return 1; + else + return 0; +} + +static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, + struct ibmvnic_sub_crq_queue *scrq) +{ + union sub_crq *entry; + unsigned long flags; + + spin_lock_irqsave(&scrq->lock, flags); + entry = &scrq->msgs[scrq->cur]; + if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { + if (++scrq->cur == scrq->size) + scrq->cur = 0; + } else { + entry = NULL; + } + spin_unlock_irqrestore(&scrq->lock, flags); + + return entry; +} + +static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) +{ + struct ibmvnic_crq_queue *queue = &adapter->crq; + union ibmvnic_crq *crq; + + crq = &queue->msgs[queue->cur]; + if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { + if (++queue->cur == queue->size) + queue->cur = 0; + } else { + crq = NULL; + } + + return crq; +} + +static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, + union sub_crq *sub_crq) +{ + unsigned int ua = adapter->vdev->unit_address; + struct device *dev = &adapter->vdev->dev; + u64 *u64_crq = (u64 *)sub_crq; + int rc; + + netdev_dbg(adapter->netdev, + "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", + (unsigned long int)cpu_to_be64(remote_handle), + (unsigned long int)cpu_to_be64(u64_crq[0]), + (unsigned long int)cpu_to_be64(u64_crq[1]), + (unsigned long int)cpu_to_be64(u64_crq[2]), + (unsigned long int)cpu_to_be64(u64_crq[3])); + + /* Make sure the hypervisor sees the complete request */ + mb(); + + rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, + cpu_to_be64(remote_handle), + cpu_to_be64(u64_crq[0]), + cpu_to_be64(u64_crq[1]), + cpu_to_be64(u64_crq[2]), + cpu_to_be64(u64_crq[3])); + + if (rc) { + if (rc == H_CLOSED) + dev_warn(dev, "CRQ Queue closed\n"); + dev_err(dev, "Send error (rc=%d)\n", rc); + } + + return rc; +} + +static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, + union ibmvnic_crq *crq) +{ + unsigned int ua = adapter->vdev->unit_address; + struct device *dev = &adapter->vdev->dev; + u64 *u64_crq = (u64 *)crq; + int rc; + + netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", + (unsigned long int)cpu_to_be64(u64_crq[0]), + (unsigned long int)cpu_to_be64(u64_crq[1])); + + /* Make sure the hypervisor sees the complete request */ + mb(); + + rc = plpar_hcall_norets(H_SEND_CRQ, ua, + cpu_to_be64(u64_crq[0]), + cpu_to_be64(u64_crq[1])); + + if (rc) { + if (rc == H_CLOSED) + dev_warn(dev, "CRQ Queue closed\n"); + dev_warn(dev, "Send error (rc=%d)\n", rc); + } + + return rc; +} + +static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) +{ + union ibmvnic_crq crq; + + memset(&crq, 0, sizeof(crq)); + crq.generic.first = IBMVNIC_CRQ_INIT_CMD; + crq.generic.cmd = IBMVNIC_CRQ_INIT; + netdev_dbg(adapter->netdev, "Sending CRQ init\n"); + + return ibmvnic_send_crq(adapter, &crq); +} + +static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter) +{ + union ibmvnic_crq crq; + + memset(&crq, 0, sizeof(crq)); + crq.generic.first = IBMVNIC_CRQ_INIT_CMD; + crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE; + netdev_dbg(adapter->netdev, "Sending CRQ init complete\n"); + + return ibmvnic_send_crq(adapter, &crq); +} + +static int send_version_xchg(struct ibmvnic_adapter *adapter) +{ + union ibmvnic_crq crq; + + memset(&crq, 0, sizeof(crq)); + crq.version_exchange.first = IBMVNIC_CRQ_CMD; + crq.version_exchange.cmd = VERSION_EXCHANGE; + crq.version_exchange.version = cpu_to_be16(ibmvnic_version); + + return ibmvnic_send_crq(adapter, &crq); +} + +static void send_login(struct ibmvnic_adapter *adapter) +{ + struct ibmvnic_login_rsp_buffer *login_rsp_buffer; + struct ibmvnic_login_buffer *login_buffer; + struct ibmvnic_inflight_cmd *inflight_cmd; + struct device *dev = &adapter->vdev->dev; + dma_addr_t rsp_buffer_token; + dma_addr_t buffer_token; + size_t rsp_buffer_size; + union ibmvnic_crq crq; + unsigned long flags; + size_t buffer_size; + __be64 *tx_list_p; + __be64 *rx_list_p; + int i; + + buffer_size = + sizeof(struct ibmvnic_login_buffer) + + sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues); + + login_buffer = kmalloc(buffer_size, GFP_ATOMIC); + if (!login_buffer) + goto buf_alloc_failed; + + buffer_token = dma_map_single(dev, login_buffer, buffer_size, + DMA_TO_DEVICE); + if (dma_mapping_error(dev, buffer_token)) { + dev_err(dev, "Couldn't map login buffer\n"); + goto buf_map_failed; + } + + rsp_buffer_size = + sizeof(struct ibmvnic_login_rsp_buffer) + + sizeof(u64) * (adapter->req_tx_queues + + adapter->req_rx_queues * + adapter->req_rx_add_queues + adapter-> + req_rx_add_queues) + + sizeof(u8) * (IBMVNIC_TX_DESC_VERSIONS); + + login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); + if (!login_rsp_buffer) + goto buf_rsp_alloc_failed; + + rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, + rsp_buffer_size, DMA_FROM_DEVICE); + if (dma_mapping_error(dev, rsp_buffer_token)) { + dev_err(dev, "Couldn't map login rsp buffer\n"); + goto buf_rsp_map_failed; + } + inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC); + if (!inflight_cmd) { + dev_err(dev, "Couldn't allocate inflight_cmd\n"); + goto inflight_alloc_failed; + } + adapter->login_buf = login_buffer; + adapter->login_buf_token = buffer_token; + adapter->login_buf_sz = buffer_size; + adapter->login_rsp_buf = login_rsp_buffer; + adapter->login_rsp_buf_token = rsp_buffer_token; + adapter->login_rsp_buf_sz = rsp_buffer_size; + + login_buffer->len = cpu_to_be32(buffer_size); + login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); + login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); + login_buffer->off_txcomp_subcrqs = + cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); + login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); + login_buffer->off_rxcomp_subcrqs = + cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + + sizeof(u64) * adapter->req_tx_queues); + login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); + login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); + + tx_list_p = (__be64 *)((char *)login_buffer + + sizeof(struct ibmvnic_login_buffer)); + rx_list_p = (__be64 *)((char *)login_buffer + + sizeof(struct ibmvnic_login_buffer) + + sizeof(u64) * adapter->req_tx_queues); + + for (i = 0; i < adapter->req_tx_queues; i++) { + if (adapter->tx_scrq[i]) { + tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> + crq_num); + } + } + + for (i = 0; i < adapter->req_rx_queues; i++) { + if (adapter->rx_scrq[i]) { + rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> + crq_num); + } + } + + netdev_dbg(adapter->netdev, "Login Buffer:\n"); + for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { + netdev_dbg(adapter->netdev, "%016lx\n", + ((unsigned long int *)(adapter->login_buf))[i]); + } + + memset(&crq, 0, sizeof(crq)); + crq.login.first = IBMVNIC_CRQ_CMD; + crq.login.cmd = LOGIN; + crq.login.ioba = cpu_to_be32(buffer_token); + crq.login.len = cpu_to_be32(buffer_size); + + memcpy(&inflight_cmd->crq, &crq, sizeof(crq)); + + spin_lock_irqsave(&adapter->inflight_lock, flags); + list_add_tail(&inflight_cmd->list, &adapter->inflight); + spin_unlock_irqrestore(&adapter->inflight_lock, flags); + + ibmvnic_send_crq(adapter, &crq); + + return; + +inflight_alloc_failed: + dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size, + DMA_FROM_DEVICE); +buf_rsp_map_failed: + kfree(login_rsp_buffer); +buf_rsp_alloc_failed: + dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); +buf_map_failed: + kfree(login_buffer); +buf_alloc_failed: + return; +} + +static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, + u32 len, u8 map_id) +{ + union ibmvnic_crq crq; + + memset(&crq, 0, sizeof(crq)); + crq.request_map.first = IBMVNIC_CRQ_CMD; + crq.request_map.cmd = REQUEST_MAP; + crq.request_map.map_id = map_id; + crq.request_map.ioba = cpu_to_be32(addr); + crq.request_map.len = cpu_to_be32(len); + ibmvnic_send_crq(adapter, &crq); +} + +static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) +{ + union ibmvnic_crq crq; + + memset(&crq, 0, sizeof(crq)); + crq.request_unmap.first = IBMVNIC_CRQ_CMD; + crq.request_unmap.cmd = REQUEST_UNMAP; + crq.request_unmap.map_id = map_id; + ibmvnic_send_crq(adapter, &crq); +} + +static void send_map_query(struct ibmvnic_adapter *adapter) +{ + union ibmvnic_crq crq; + + memset(&crq, 0, sizeof(crq)); + crq.query_map.first = IBMVNIC_CRQ_CMD; + crq.query_map.cmd = QUERY_MAP; + ibmvnic_send_crq(adapter, &crq); +} + +/* Send a series of CRQs requesting various capabilities of the VNIC server */ +static void send_cap_queries(struct ibmvnic_adapter *adapter) +{ + union ibmvnic_crq crq; + + atomic_set(&adapter->running_cap_queries, 0); + memset(&crq, 0, sizeof(crq)); + crq.query_capability.first = IBMVNIC_CRQ_CMD; + crq.query_capability.cmd = QUERY_CAPABILITY; + + crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); + + crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); + + crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); + + crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); + + crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); + + crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); + + crq.query_capability.capability = + cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); + + crq.query_capability.capability = + cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); + + crq.query_capability.capability = + cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); + + crq.query_capability.capability = + cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); + + crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); + + crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); + + crq.query_capability.capability = cpu_to_be16(MIN_MTU); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); + + crq.query_capability.capability = cpu_to_be16(MAX_MTU); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); + + crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); + + crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); + + crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); + + crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); + + crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); + + crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); + + crq.query_capability.capability = + cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); + + crq.query_capability.capability = + cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); + + crq.query_capability.capability = + cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); + + crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); + atomic_inc(&adapter->running_cap_queries); + ibmvnic_send_crq(adapter, &crq); +} + +static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) +{ + struct device *dev = &adapter->vdev->dev; + struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; + union ibmvnic_crq crq; + int i; + + dma_unmap_single(dev, adapter->ip_offload_tok, + sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); + + netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); + for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) + netdev_dbg(adapter->netdev, "%016lx\n", + ((unsigned long int *)(buf))[i]); + + netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); + netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); + netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", + buf->tcp_ipv4_chksum); + netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", + buf->tcp_ipv6_chksum); + netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", + buf->udp_ipv4_chksum); + netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", + buf->udp_ipv6_chksum); + netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", + buf->large_tx_ipv4); + netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", + buf->large_tx_ipv6); + netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", + buf->large_rx_ipv4); + netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", + buf->large_rx_ipv6); + netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", + buf->max_ipv4_header_size); + netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", + buf->max_ipv6_header_size); + netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", + buf->max_tcp_header_size); + netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", + buf->max_udp_header_size); + netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", + buf->max_large_tx_size); + netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", + buf->max_large_rx_size); + netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", + buf->ipv6_extension_header); + netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", + buf->tcp_pseudosum_req); + netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", + buf->num_ipv6_ext_headers); + netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", + buf->off_ipv6_ext_headers); + + adapter->ip_offload_ctrl_tok = + dma_map_single(dev, &adapter->ip_offload_ctrl, + sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); + + if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { + dev_err(dev, "Couldn't map ip offload control buffer\n"); + return; + } + + adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); + adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; + adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; + adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; + adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; + + /* large_tx/rx disabled for now, additional features needed */ + adapter->ip_offload_ctrl.large_tx_ipv4 = 0; + adapter->ip_offload_ctrl.large_tx_ipv6 = 0; + adapter->ip_offload_ctrl.large_rx_ipv4 = 0; + adapter->ip_offload_ctrl.large_rx_ipv6 = 0; + + adapter->netdev->features = NETIF_F_GSO; + + if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) + adapter->netdev->features |= NETIF_F_IP_CSUM; + + if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) + adapter->netdev->features |= NETIF_F_IPV6_CSUM; + + memset(&crq, 0, sizeof(crq)); + crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; + crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; + crq.control_ip_offload.len = + cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); + crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); + ibmvnic_send_crq(adapter, &crq); +} + +static void handle_error_info_rsp(union ibmvnic_crq *crq, + struct ibmvnic_adapter *adapter) +{ + struct device *dev = &adapter->vdev->dev; + struct ibmvnic_error_buff *error_buff; + unsigned long flags; + bool found = false; + int i; + + if (!crq->request_error_rsp.rc.code) { + dev_info(dev, "Request Error Rsp returned with rc=%x\n", + crq->request_error_rsp.rc.code); + return; + } + + spin_lock_irqsave(&adapter->error_list_lock, flags); + list_for_each_entry(error_buff, &adapter->errors, list) + if (error_buff->error_id == crq->request_error_rsp.error_id) { + found = true; + list_del(&error_buff->list); + break; + } + spin_unlock_irqrestore(&adapter->error_list_lock, flags); + + if (!found) { + dev_err(dev, "Couldn't find error id %x\n", + crq->request_error_rsp.error_id); + return; + } + + dev_err(dev, "Detailed info for error id %x:", + crq->request_error_rsp.error_id); + + for (i = 0; i < error_buff->len; i++) { + pr_cont("%02x", (int)error_buff->buff[i]); + if (i % 8 == 7) + pr_cont(" "); + } + pr_cont("\n"); + + dma_unmap_single(dev, error_buff->dma, error_buff->len, + DMA_FROM_DEVICE); + kfree(error_buff->buff); + kfree(error_buff); +} + +static void handle_dump_size_rsp(union ibmvnic_crq *crq, + struct ibmvnic_adapter *adapter) +{ + int len = be32_to_cpu(crq->request_dump_size_rsp.len); + struct ibmvnic_inflight_cmd *inflight_cmd; + struct device *dev = &adapter->vdev->dev; + union ibmvnic_crq newcrq; + unsigned long flags; + + /* allocate and map buffer */ + adapter->dump_data = kmalloc(len, GFP_KERNEL); + if (!adapter->dump_data) { + complete(&adapter->fw_done); + return; + } + + adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len, + DMA_FROM_DEVICE); + + if (dma_mapping_error(dev, adapter->dump_data_token)) { + if (!firmware_has_feature(FW_FEATURE_CMO)) + dev_err(dev, "Couldn't map dump data\n"); + kfree(adapter->dump_data); + complete(&adapter->fw_done); + return; + } + + inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC); + if (!inflight_cmd) { + dma_unmap_single(dev, adapter->dump_data_token, len, + DMA_FROM_DEVICE); + kfree(adapter->dump_data); + complete(&adapter->fw_done); + return; + } + + memset(&newcrq, 0, sizeof(newcrq)); + newcrq.request_dump.first = IBMVNIC_CRQ_CMD; + newcrq.request_dump.cmd = REQUEST_DUMP; + newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token); + newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size); + + memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq)); + + spin_lock_irqsave(&adapter->inflight_lock, flags); + list_add_tail(&inflight_cmd->list, &adapter->inflight); + spin_unlock_irqrestore(&adapter->inflight_lock, flags); + + ibmvnic_send_crq(adapter, &newcrq); +} + +static void handle_error_indication(union ibmvnic_crq *crq, + struct ibmvnic_adapter *adapter) +{ + int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz); + struct ibmvnic_inflight_cmd *inflight_cmd; + struct device *dev = &adapter->vdev->dev; + struct ibmvnic_error_buff *error_buff; + union ibmvnic_crq new_crq; + unsigned long flags; + + dev_err(dev, "Firmware reports %serror id %x, cause %d\n", + crq->error_indication. + flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "", + crq->error_indication.error_id, + crq->error_indication.error_cause); + + error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC); + if (!error_buff) + return; + + error_buff->buff = kmalloc(detail_len, GFP_ATOMIC); + if (!error_buff->buff) { + kfree(error_buff); + return; + } + + error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len, + DMA_FROM_DEVICE); + if (dma_mapping_error(dev, error_buff->dma)) { + if (!firmware_has_feature(FW_FEATURE_CMO)) + dev_err(dev, "Couldn't map error buffer\n"); + kfree(error_buff->buff); + kfree(error_buff); + return; + } + + inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC); + if (!inflight_cmd) { + dma_unmap_single(dev, error_buff->dma, detail_len, + DMA_FROM_DEVICE); + kfree(error_buff->buff); + kfree(error_buff); + return; + } + + error_buff->len = detail_len; + error_buff->error_id = crq->error_indication.error_id; + + spin_lock_irqsave(&adapter->error_list_lock, flags); + list_add_tail(&error_buff->list, &adapter->errors); + spin_unlock_irqrestore(&adapter->error_list_lock, flags); + + memset(&new_crq, 0, sizeof(new_crq)); + new_crq.request_error_info.first = IBMVNIC_CRQ_CMD; + new_crq.request_error_info.cmd = REQUEST_ERROR_INFO; + new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma); + new_crq.request_error_info.len = cpu_to_be32(detail_len); + new_crq.request_error_info.error_id = crq->error_indication.error_id; + + memcpy(&inflight_cmd->crq, &crq, sizeof(crq)); + + spin_lock_irqsave(&adapter->inflight_lock, flags); + list_add_tail(&inflight_cmd->list, &adapter->inflight); + spin_unlock_irqrestore(&adapter->inflight_lock, flags); + + ibmvnic_send_crq(adapter, &new_crq); +} + +static void handle_change_mac_rsp(union ibmvnic_crq *crq, + struct ibmvnic_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + struct device *dev = &adapter->vdev->dev; + long rc; + + rc = crq->change_mac_addr_rsp.rc.code; + if (rc) { + dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); + return; + } + memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], + ETH_ALEN); +} + +static void handle_request_cap_rsp(union ibmvnic_crq *crq, + struct ibmvnic_adapter *adapter) +{ + struct device *dev = &adapter->vdev->dev; + u64 *req_value; + char *name; + + switch (be16_to_cpu(crq->request_capability_rsp.capability)) { + case REQ_TX_QUEUES: + req_value = &adapter->req_tx_queues; + name = "tx"; + break; + case REQ_RX_QUEUES: + req_value = &adapter->req_rx_queues; + name = "rx"; + break; + case REQ_RX_ADD_QUEUES: + req_value = &adapter->req_rx_add_queues; + name = "rx_add"; + break; + case REQ_TX_ENTRIES_PER_SUBCRQ: + req_value = &adapter->req_tx_entries_per_subcrq; + name = "tx_entries_per_subcrq"; + break; + case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: + req_value = &adapter->req_rx_add_entries_per_subcrq; + name = "rx_add_entries_per_subcrq"; + break; + case REQ_MTU: + req_value = &adapter->req_mtu; + name = "mtu"; + break; + case PROMISC_REQUESTED: + req_value = &adapter->promisc; + name = "promisc"; + break; + default: + dev_err(dev, "Got invalid cap request rsp %d\n", + crq->request_capability.capability); + return; + } + + switch (crq->request_capability_rsp.rc.code) { + case SUCCESS: + break; + case PARTIALSUCCESS: + dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", + *req_value, + (long int)be32_to_cpu(crq->request_capability_rsp. + number), name); + release_sub_crqs(adapter); + *req_value = be32_to_cpu(crq->request_capability_rsp.number); + complete(&adapter->init_done); + return; + default: + dev_err(dev, "Error %d in request cap rsp\n", + crq->request_capability_rsp.rc.code); + return; + } + + /* Done receiving requested capabilities, query IP offload support */ + if (++adapter->requested_caps == 7) { + union ibmvnic_crq newcrq; + int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); + struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = + &adapter->ip_offload_buf; + + adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, + buf_sz, + DMA_FROM_DEVICE); + + if (dma_mapping_error(dev, adapter->ip_offload_tok)) { + if (!firmware_has_feature(FW_FEATURE_CMO)) + dev_err(dev, "Couldn't map offload buffer\n"); + return; + } + + memset(&newcrq, 0, sizeof(newcrq)); + newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; + newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; + newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); + newcrq.query_ip_offload.ioba = + cpu_to_be32(adapter->ip_offload_tok); + + ibmvnic_send_crq(adapter, &newcrq); + } +} + +static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, + struct ibmvnic_adapter *adapter) +{ + struct device *dev = &adapter->vdev->dev; + struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; + struct ibmvnic_login_buffer *login = adapter->login_buf; + union ibmvnic_crq crq; + int i; + + dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, + DMA_BIDIRECTIONAL); + dma_unmap_single(dev, adapter->login_rsp_buf_token, + adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL); + + netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); + for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { + netdev_dbg(adapter->netdev, "%016lx\n", + ((unsigned long int *)(adapter->login_rsp_buf))[i]); + } + + /* Sanity checks */ + if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || + (be32_to_cpu(login->num_rxcomp_subcrqs) * + adapter->req_rx_add_queues != + be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { + dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); + ibmvnic_remove(adapter->vdev); + return -EIO; + } + complete(&adapter->init_done); + + memset(&crq, 0, sizeof(crq)); + crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD; + crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM; + ibmvnic_send_crq(adapter, &crq); + + return 0; +} + +static void handle_request_map_rsp(union ibmvnic_crq *crq, + struct ibmvnic_adapter *adapter) +{ + struct device *dev = &adapter->vdev->dev; + u8 map_id = crq->request_map_rsp.map_id; + int tx_subcrqs; + int rx_subcrqs; + long rc; + int i; + + tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); + rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); + + rc = crq->request_map_rsp.rc.code; + if (rc) { + dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc); + adapter->map_id--; + /* need to find and zero tx/rx_pool map_id */ + for (i = 0; i < tx_subcrqs; i++) { + if (adapter->tx_pool[i].long_term_buff.map_id == map_id) + adapter->tx_pool[i].long_term_buff.map_id = 0; + } + for (i = 0; i < rx_subcrqs; i++) { + if (adapter->rx_pool[i].long_term_buff.map_id == map_id) + adapter->rx_pool[i].long_term_buff.map_id = 0; + } + } + complete(&adapter->fw_done); +} + +static void handle_request_unmap_rsp(union ibmvnic_crq *crq, + struct ibmvnic_adapter *adapter) +{ + struct device *dev = &adapter->vdev->dev; + long rc; + + rc = crq->request_unmap_rsp.rc.code; + if (rc) + dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); +} + +static void handle_query_map_rsp(union ibmvnic_crq *crq, + struct ibmvnic_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + struct device *dev = &adapter->vdev->dev; + long rc; + + rc = crq->query_map_rsp.rc.code; + if (rc) { + dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); + return; + } + netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", + crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, + crq->query_map_rsp.free_pages); +} + +static void handle_query_cap_rsp(union ibmvnic_crq *crq, + struct ibmvnic_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + struct device *dev = &adapter->vdev->dev; + long rc; + + atomic_dec(&adapter->running_cap_queries); + netdev_dbg(netdev, "Outstanding queries: %d\n", + atomic_read(&adapter->running_cap_queries)); + rc = crq->query_capability.rc.code; + if (rc) { + dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); + goto out; + } + + switch (be16_to_cpu(crq->query_capability.capability)) { + case MIN_TX_QUEUES: + adapter->min_tx_queues = + be32_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 = + be32_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 = + be32_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 = + be32_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 = + be32_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 = + be32_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 = + be32_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 = + be32_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 = + be32_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 = + be32_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 = + be32_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 = + be32_to_cpu(crq->query_capability.number); + netdev_dbg(netdev, "promisc_supported = %lld\n", + adapter->promisc_supported); + break; + case MIN_MTU: + adapter->min_mtu = be32_to_cpu(crq->query_capability.number); + netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); + break; + case MAX_MTU: + adapter->max_mtu = be32_to_cpu(crq->query_capability.number); + netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); + break; + case MAX_MULTICAST_FILTERS: + adapter->max_multicast_filters = + be32_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 = + be32_to_cpu(crq->query_capability.number); + if (adapter->vlan_header_insertion) + netdev->features |= NETIF_F_HW_VLAN_STAG_TX; + netdev_dbg(netdev, "vlan_header_insertion = %lld\n", + adapter->vlan_header_insertion); + break; + case MAX_TX_SG_ENTRIES: + adapter->max_tx_sg_entries = + be32_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 = + be32_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 = + be32_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 = + be32_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 = + be32_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 = + be32_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 = + be32_to_cpu(crq->query_capability.number); + netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", + adapter->opt_rxba_entries_per_subcrq); + break; + case TX_RX_DESC_REQ: + adapter->tx_rx_desc_req = crq->query_capability.number; + netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", + adapter->tx_rx_desc_req); + break; + + default: + netdev_err(netdev, "Got invalid cap rsp %d\n", + crq->query_capability.capability); + } + +out: + if (atomic_read(&adapter->running_cap_queries) == 0) + complete(&adapter->init_done); + /* We're done querying the capabilities, initialize sub-crqs */ +} + +static void handle_control_ras_rsp(union ibmvnic_crq *crq, + struct ibmvnic_adapter *adapter) +{ + u8 correlator = crq->control_ras_rsp.correlator; + struct device *dev = &adapter->vdev->dev; + bool found = false; + int i; + + if (crq->control_ras_rsp.rc.code) { + dev_warn(dev, "Control ras failed rc=%d\n", + crq->control_ras_rsp.rc.code); + return; + } + + for (i = 0; i < adapter->ras_comp_num; i++) { + if (adapter->ras_comps[i].correlator == correlator) { + found = true; + break; + } + } + + if (!found) { + dev_warn(dev, "Correlator not found on control_ras_rsp\n"); + return; + } + + switch (crq->control_ras_rsp.op) { + case IBMVNIC_TRACE_LEVEL: + adapter->ras_comps[i].trace_level = crq->control_ras.level; + break; + case IBMVNIC_ERROR_LEVEL: + adapter->ras_comps[i].error_check_level = + crq->control_ras.level; + break; + case IBMVNIC_TRACE_PAUSE: + adapter->ras_comp_int[i].paused = 1; + break; + case IBMVNIC_TRACE_RESUME: + adapter->ras_comp_int[i].paused = 0; + break; + case IBMVNIC_TRACE_ON: + adapter->ras_comps[i].trace_on = 1; + break; + case IBMVNIC_TRACE_OFF: + adapter->ras_comps[i].trace_on = 0; + break; + case IBMVNIC_CHG_TRACE_BUFF_SZ: + /* trace_buff_sz is 3 bytes, stuff it into an int */ + ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0; + ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] = + crq->control_ras_rsp.trace_buff_sz[0]; + ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] = + crq->control_ras_rsp.trace_buff_sz[1]; + ((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] = + crq->control_ras_rsp.trace_buff_sz[2]; + break; + default: + dev_err(dev, "invalid op %d on control_ras_rsp", + crq->control_ras_rsp.op); + } +} + +static int ibmvnic_fw_comp_open(struct inode *inode, struct file *file) +{ + file->private_data = inode->i_private; + return 0; +} + +static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len, + loff_t *ppos) +{ + struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; + struct ibmvnic_adapter *adapter = ras_comp_int->adapter; + struct device *dev = &adapter->vdev->dev; + struct ibmvnic_fw_trace_entry *trace; + int num = ras_comp_int->num; + union ibmvnic_crq crq; + dma_addr_t trace_tok; + + if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size)) + return 0; + + trace = + dma_alloc_coherent(dev, + be32_to_cpu(adapter->ras_comps[num]. + trace_buff_size), &trace_tok, + GFP_KERNEL); + if (!trace) { + dev_err(dev, "Couldn't alloc trace buffer\n"); + return 0; + } + + memset(&crq, 0, sizeof(crq)); + crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD; + crq.collect_fw_trace.cmd = COLLECT_FW_TRACE; + crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator; + crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok); + crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size; + ibmvnic_send_crq(adapter, &crq); + + init_completion(&adapter->fw_done); + wait_for_completion(&adapter->fw_done); + + if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size)) + len = + be32_to_cpu(adapter->ras_comps[num].trace_buff_size) - + *ppos; + + copy_to_user(user_buf, &((u8 *)trace)[*ppos], len); + + dma_free_coherent(dev, + be32_to_cpu(adapter->ras_comps[num].trace_buff_size), + trace, trace_tok); + *ppos += len; + return len; +} + +static const struct file_operations trace_ops = { + .owner = THIS_MODULE, + .open = ibmvnic_fw_comp_open, + .read = trace_read, +}; + +static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len, + loff_t *ppos) +{ + struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; + struct ibmvnic_adapter *adapter = ras_comp_int->adapter; + int num = ras_comp_int->num; + char buff[5]; /* 1 or 0 plus \n and \0 */ + int size; + + size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused); + + if (*ppos >= size) + return 0; + + copy_to_user(user_buf, buff, size); + *ppos += size; + return size; +} + +static ssize_t paused_write(struct file *file, const char __user *user_buf, + size_t len, loff_t *ppos) +{ + struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; + struct ibmvnic_adapter *adapter = ras_comp_int->adapter; + int num = ras_comp_int->num; + union ibmvnic_crq crq; + unsigned long val; + char buff[9]; /* decimal max int plus \n and \0 */ + + copy_from_user(buff, user_buf, sizeof(buff)); + val = kstrtoul(buff, 10, NULL); + + adapter->ras_comp_int[num].paused = val ? 1 : 0; + + memset(&crq, 0, sizeof(crq)); + crq.control_ras.first = IBMVNIC_CRQ_CMD; + crq.control_ras.cmd = CONTROL_RAS; + crq.control_ras.correlator = adapter->ras_comps[num].correlator; + crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME; + ibmvnic_send_crq(adapter, &crq); + + return len; +} + +static const struct file_operations paused_ops = { + .owner = THIS_MODULE, + .open = ibmvnic_fw_comp_open, + .read = paused_read, + .write = paused_write, +}; + +static ssize_t tracing_read(struct file *file, char __user *user_buf, + size_t len, loff_t *ppos) +{ + struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; + struct ibmvnic_adapter *adapter = ras_comp_int->adapter; + int num = ras_comp_int->num; + char buff[5]; /* 1 or 0 plus \n and \0 */ + int size; + + size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on); + + if (*ppos >= size) + return 0; + + copy_to_user(user_buf, buff, size); + *ppos += size; + return size; +} + +static ssize_t tracing_write(struct file *file, const char __user *user_buf, + size_t len, loff_t *ppos) +{ + struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; + struct ibmvnic_adapter *adapter = ras_comp_int->adapter; + int num = ras_comp_int->num; + union ibmvnic_crq crq; + unsigned long val; + char buff[9]; /* decimal max int plus \n and \0 */ + + copy_from_user(buff, user_buf, sizeof(buff)); + val = kstrtoul(buff, 10, NULL); + + memset(&crq, 0, sizeof(crq)); + crq.control_ras.first = IBMVNIC_CRQ_CMD; + crq.control_ras.cmd = CONTROL_RAS; + crq.control_ras.correlator = adapter->ras_comps[num].correlator; + crq.control_ras.op = val ? IBMVNIC_TRACE_ON : IBMVNIC_TRACE_OFF; + + return len; +} + +static const struct file_operations tracing_ops = { + .owner = THIS_MODULE, + .open = ibmvnic_fw_comp_open, + .read = tracing_read, + .write = tracing_write, +}; + +static ssize_t error_level_read(struct file *file, char __user *user_buf, + size_t len, loff_t *ppos) +{ + struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; + struct ibmvnic_adapter *adapter = ras_comp_int->adapter; + int num = ras_comp_int->num; + char buff[5]; /* decimal max char plus \n and \0 */ + int size; + + size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level); + + if (*ppos >= size) + return 0; + + copy_to_user(user_buf, buff, size); + *ppos += size; + return size; +} + +static ssize_t error_level_write(struct file *file, const char __user *user_buf, + size_t len, loff_t *ppos) +{ + struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; + struct ibmvnic_adapter *adapter = ras_comp_int->adapter; + int num = ras_comp_int->num; + union ibmvnic_crq crq; + unsigned long val; + char buff[9]; /* decimal max int plus \n and \0 */ + + copy_from_user(buff, user_buf, sizeof(buff)); + val = kstrtoul(buff, 10, NULL); + + if (val > 9) + val = 9; + + memset(&crq, 0, sizeof(crq)); + crq.control_ras.first = IBMVNIC_CRQ_CMD; + crq.control_ras.cmd = CONTROL_RAS; + crq.control_ras.correlator = adapter->ras_comps[num].correlator; + crq.control_ras.op = IBMVNIC_ERROR_LEVEL; + crq.control_ras.level = val; + ibmvnic_send_crq(adapter, &crq); + + return len; +} + +static const struct file_operations error_level_ops = { + .owner = THIS_MODULE, + .open = ibmvnic_fw_comp_open, + .read = error_level_read, + .write = error_level_write, +}; + +static ssize_t trace_level_read(struct file *file, char __user *user_buf, + size_t len, loff_t *ppos) +{ + struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; + struct ibmvnic_adapter *adapter = ras_comp_int->adapter; + int num = ras_comp_int->num; + char buff[5]; /* decimal max char plus \n and \0 */ + int size; + + size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level); + if (*ppos >= size) + return 0; + + copy_to_user(user_buf, buff, size); + *ppos += size; + return size; +} + +static ssize_t trace_level_write(struct file *file, const char __user *user_buf, + size_t len, loff_t *ppos) +{ + struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; + struct ibmvnic_adapter *adapter = ras_comp_int->adapter; + union ibmvnic_crq crq; + unsigned long val; + char buff[9]; /* decimal max int plus \n and \0 */ + + copy_from_user(buff, user_buf, sizeof(buff)); + val = kstrtoul(buff, 10, NULL); + if (val > 9) + val = 9; + + memset(&crq, 0, sizeof(crq)); + crq.control_ras.first = IBMVNIC_CRQ_CMD; + crq.control_ras.cmd = CONTROL_RAS; + crq.control_ras.correlator = + adapter->ras_comps[ras_comp_int->num].correlator; + crq.control_ras.op = IBMVNIC_TRACE_LEVEL; + crq.control_ras.level = val; + ibmvnic_send_crq(adapter, &crq); + + return len; +} + +static const struct file_operations trace_level_ops = { + .owner = THIS_MODULE, + .open = ibmvnic_fw_comp_open, + .read = trace_level_read, + .write = trace_level_write, +}; + +static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf, + size_t len, loff_t *ppos) +{ + struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; + struct ibmvnic_adapter *adapter = ras_comp_int->adapter; + int num = ras_comp_int->num; + char buff[9]; /* decimal max int plus \n and \0 */ + int size; + + size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size); + if (*ppos >= size) + return 0; + + copy_to_user(user_buf, buff, size); + *ppos += size; + return size; +} + +static ssize_t trace_buff_size_write(struct file *file, + const char __user *user_buf, size_t len, + loff_t *ppos) +{ + struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data; + struct ibmvnic_adapter *adapter = ras_comp_int->adapter; + union ibmvnic_crq crq; + unsigned long val; + char buff[9]; /* decimal max int plus \n and \0 */ + + copy_from_user(buff, user_buf, sizeof(buff)); + val = kstrtoul(buff, 10, NULL); + + memset(&crq, 0, sizeof(crq)); + crq.control_ras.first = IBMVNIC_CRQ_CMD; + crq.control_ras.cmd = CONTROL_RAS; + crq.control_ras.correlator = + adapter->ras_comps[ras_comp_int->num].correlator; + crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ; + /* trace_buff_sz is 3 bytes, stuff an int into it */ + crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5]; + crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6]; + crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7]; + ibmvnic_send_crq(adapter, &crq); + + return len; +} + +static const struct file_operations trace_size_ops = { + .owner = THIS_MODULE, + .open = ibmvnic_fw_comp_open, + .read = trace_buff_size_read, + .write = trace_buff_size_write, +}; + +static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq, + struct ibmvnic_adapter *adapter) +{ + struct device *dev = &adapter->vdev->dev; + struct dentry *dir_ent; + struct dentry *ent; + int i; + + debugfs_remove_recursive(adapter->ras_comps_ent); + + adapter->ras_comps_ent = debugfs_create_dir("ras_comps", + adapter->debugfs_dir); + if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) { + dev_info(dev, "debugfs create ras_comps dir failed\n"); + return; + } + + for (i = 0; i < adapter->ras_comp_num; i++) { + dir_ent = debugfs_create_dir(adapter->ras_comps[i].name, + adapter->ras_comps_ent); + if (!dir_ent || IS_ERR(dir_ent)) { + dev_info(dev, "debugfs create %s dir failed\n", + adapter->ras_comps[i].name); + continue; + } + + adapter->ras_comp_int[i].adapter = adapter; + adapter->ras_comp_int[i].num = i; + adapter->ras_comp_int[i].desc_blob.data = + &adapter->ras_comps[i].description; + adapter->ras_comp_int[i].desc_blob.size = + sizeof(adapter->ras_comps[i].description); + + /* Don't need to remember the dentry's because the debugfs dir + * gets removed recursively + */ + ent = debugfs_create_blob("description", S_IRUGO, dir_ent, + &adapter->ras_comp_int[i].desc_blob); + ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR, + dir_ent, &adapter->ras_comp_int[i], + &trace_size_ops); + ent = debugfs_create_file("trace_level", + S_IRUGO | + (adapter->ras_comps[i].trace_level != + 0xFF ? S_IWUSR : 0), + dir_ent, &adapter->ras_comp_int[i], + &trace_level_ops); + ent = debugfs_create_file("error_level", + S_IRUGO | + (adapter-> + ras_comps[i].error_check_level != + 0xFF ? S_IWUSR : 0), + dir_ent, &adapter->ras_comp_int[i], + &trace_level_ops); + ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR, + dir_ent, &adapter->ras_comp_int[i], + &tracing_ops); + ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR, + dir_ent, &adapter->ras_comp_int[i], + &paused_ops); + ent = debugfs_create_file("trace", S_IRUGO, dir_ent, + &adapter->ras_comp_int[i], + &trace_ops); + } +} + +static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq, + struct ibmvnic_adapter *adapter) +{ + int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component); + struct device *dev = &adapter->vdev->dev; + union ibmvnic_crq newcrq; + + adapter->ras_comps = dma_alloc_coherent(dev, len, + &adapter->ras_comps_tok, + GFP_KERNEL); + if (!adapter->ras_comps) { + if (!firmware_has_feature(FW_FEATURE_CMO)) + dev_err(dev, "Couldn't alloc fw comps buffer\n"); + return; + } + + adapter->ras_comp_int = kmalloc(adapter->ras_comp_num * + sizeof(struct ibmvnic_fw_comp_internal), + GFP_KERNEL); + if (!adapter->ras_comp_int) + dma_free_coherent(dev, len, adapter->ras_comps, + adapter->ras_comps_tok); + + memset(&newcrq, 0, sizeof(newcrq)); + newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD; + newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS; + newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok); + newcrq.request_ras_comps.len = cpu_to_be32(len); + ibmvnic_send_crq(adapter, &newcrq); +} + +static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter) +{ + struct ibmvnic_inflight_cmd *inflight_cmd; + struct device *dev = &adapter->vdev->dev; + struct ibmvnic_error_buff *error_buff; + unsigned long flags; + unsigned long flags2; + + spin_lock_irqsave(&adapter->inflight_lock, flags); + list_for_each_entry(inflight_cmd, &adapter->inflight, list) { + switch (inflight_cmd->crq.generic.cmd) { + case LOGIN: + dma_unmap_single(dev, adapter->login_buf_token, + adapter->login_buf_sz, + DMA_BIDIRECTIONAL); + dma_unmap_single(dev, adapter->login_rsp_buf_token, + adapter->login_rsp_buf_sz, + DMA_BIDIRECTIONAL); + kfree(adapter->login_rsp_buf); + kfree(adapter->login_buf); + break; + case REQUEST_DUMP: + complete(&adapter->fw_done); + break; + case REQUEST_ERROR_INFO: + spin_lock_irqsave(&adapter->error_list_lock, flags2); + list_for_each_entry(error_buff, &adapter->errors, + list) { + dma_unmap_single(dev, error_buff->dma, + error_buff->len, + DMA_FROM_DEVICE); + kfree(error_buff->buff); + list_del(&error_buff->list); + kfree(error_buff); + } + spin_unlock_irqrestore(&adapter->error_list_lock, + flags2); + break; + } + list_del(&inflight_cmd->list); + kfree(inflight_cmd); + } + spin_unlock_irqrestore(&adapter->inflight_lock, flags); +} + +static void ibmvnic_handle_crq(union ibmvnic_crq *crq, + struct ibmvnic_adapter *adapter) +{ + struct ibmvnic_generic_crq *gen_crq = &crq->generic; + struct net_device *netdev = adapter->netdev; + struct device *dev = &adapter->vdev->dev; + long rc; + + netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", + ((unsigned long int *)crq)[0], + ((unsigned long int *)crq)[1]); + switch (gen_crq->first) { + case IBMVNIC_CRQ_INIT_RSP: + switch (gen_crq->cmd) { + case IBMVNIC_CRQ_INIT: + dev_info(dev, "Partner initialized\n"); + /* Send back a response */ + rc = ibmvnic_send_crq_init_complete(adapter); + if (rc == 0) + send_version_xchg(adapter); + else + dev_err(dev, "Can't send initrsp rc=%ld\n", rc); + break; + case IBMVNIC_CRQ_INIT_COMPLETE: + dev_info(dev, "Partner initialization complete\n"); + send_version_xchg(adapter); + break; + default: + dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); + } + return; + case IBMVNIC_CRQ_XPORT_EVENT: + if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { + dev_info(dev, "Re-enabling adapter\n"); + adapter->migrated = true; + ibmvnic_free_inflight(adapter); + release_sub_crqs(adapter); + rc = ibmvnic_reenable_crq_queue(adapter); + if (rc) + dev_err(dev, "Error after enable rc=%ld\n", rc); + adapter->migrated = false; + rc = ibmvnic_send_crq_init(adapter); + if (rc) + dev_err(dev, "Error sending init rc=%ld\n", rc); + } else { + /* The adapter lost the connection */ + dev_err(dev, "Virtual Adapter failed (rc=%d)\n", + gen_crq->cmd); + ibmvnic_free_inflight(adapter); + release_sub_crqs(adapter); + } + return; + case IBMVNIC_CRQ_CMD_RSP: + break; + default: + dev_err(dev, "Got an invalid msg type 0x%02x\n", + gen_crq->first); + return; + } + + switch (gen_crq->cmd) { + case VERSION_EXCHANGE_RSP: + rc = crq->version_exchange_rsp.rc.code; + if (rc) { + dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); + break; + } + dev_info(dev, "Partner protocol version is %d\n", + crq->version_exchange_rsp.version); + if (be16_to_cpu(crq->version_exchange_rsp.version) < + ibmvnic_version) + ibmvnic_version = + be16_to_cpu(crq->version_exchange_rsp.version); + send_cap_queries(adapter); + break; + case QUERY_CAPABILITY_RSP: + handle_query_cap_rsp(crq, adapter); + break; + case QUERY_MAP_RSP: + handle_query_map_rsp(crq, adapter); + break; + case REQUEST_MAP_RSP: + handle_request_map_rsp(crq, adapter); + break; + case REQUEST_UNMAP_RSP: + handle_request_unmap_rsp(crq, adapter); + break; + case REQUEST_CAPABILITY_RSP: + handle_request_cap_rsp(crq, adapter); + break; + case LOGIN_RSP: + netdev_dbg(netdev, "Got Login Response\n"); + handle_login_rsp(crq, adapter); + break; + case LOGICAL_LINK_STATE_RSP: + netdev_dbg(netdev, "Got Logical Link State Response\n"); + adapter->logical_link_state = + crq->logical_link_state_rsp.link_state; + break; + case LINK_STATE_INDICATION: + netdev_dbg(netdev, "Got Logical Link State Indication\n"); + adapter->phys_link_state = + crq->link_state_indication.phys_link_state; + adapter->logical_link_state = + crq->link_state_indication.logical_link_state; + break; + case CHANGE_MAC_ADDR_RSP: + netdev_dbg(netdev, "Got MAC address change Response\n"); + handle_change_mac_rsp(crq, adapter); + break; + case ERROR_INDICATION: + netdev_dbg(netdev, "Got Error Indication\n"); + handle_error_indication(crq, adapter); + break; + case REQUEST_ERROR_RSP: + netdev_dbg(netdev, "Got Error Detail Response\n"); + handle_error_info_rsp(crq, adapter); + break; + case REQUEST_STATISTICS_RSP: + netdev_dbg(netdev, "Got Statistics Response\n"); + complete(&adapter->stats_done); + break; + case REQUEST_DUMP_SIZE_RSP: + netdev_dbg(netdev, "Got Request Dump Size Response\n"); + handle_dump_size_rsp(crq, adapter); + break; + case REQUEST_DUMP_RSP: + netdev_dbg(netdev, "Got Request Dump Response\n"); + complete(&adapter->fw_done); + break; + case QUERY_IP_OFFLOAD_RSP: + netdev_dbg(netdev, "Got Query IP offload Response\n"); + handle_query_ip_offload_rsp(adapter); + break; + case MULTICAST_CTRL_RSP: + netdev_dbg(netdev, "Got multicast control Response\n"); + break; + case CONTROL_IP_OFFLOAD_RSP: + netdev_dbg(netdev, "Got Control IP offload Response\n"); + dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, + sizeof(adapter->ip_offload_ctrl), + DMA_TO_DEVICE); + /* We're done with the queries, perform the login */ + send_login(adapter); + break; + case REQUEST_RAS_COMP_NUM_RSP: + netdev_dbg(netdev, "Got Request RAS Comp Num Response\n"); + if (crq->request_ras_comp_num_rsp.rc.code == 10) { + netdev_dbg(netdev, "Request RAS Comp Num not supported\n"); + break; + } + adapter->ras_comp_num = + be32_to_cpu(crq->request_ras_comp_num_rsp.num_components); + handle_request_ras_comp_num_rsp(crq, adapter); + break; + case REQUEST_RAS_COMPS_RSP: + netdev_dbg(netdev, "Got Request RAS Comps Response\n"); + handle_request_ras_comps_rsp(crq, adapter); + break; + case CONTROL_RAS_RSP: + netdev_dbg(netdev, "Got Control RAS Response\n"); + handle_control_ras_rsp(crq, adapter); + break; + case COLLECT_FW_TRACE_RSP: + netdev_dbg(netdev, "Got Collect firmware trace Response\n"); + complete(&adapter->fw_done); + break; + default: + netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", + gen_crq->cmd); + } +} + +static irqreturn_t ibmvnic_interrupt(int irq, void *instance) +{ + struct ibmvnic_adapter *adapter = instance; + struct ibmvnic_crq_queue *queue = &adapter->crq; + struct vio_dev *vdev = adapter->vdev; + union ibmvnic_crq *crq; + unsigned long flags; + bool done = false; + + spin_lock_irqsave(&queue->lock, flags); + vio_disable_interrupts(vdev); + while (!done) { + /* Pull all the valid messages off the CRQ */ + while ((crq = ibmvnic_next_crq(adapter)) != NULL) { + ibmvnic_handle_crq(crq, adapter); + crq->generic.first = 0; + } + vio_enable_interrupts(vdev); + crq = ibmvnic_next_crq(adapter); + if (crq) { + vio_disable_interrupts(vdev); + ibmvnic_handle_crq(crq, adapter); + crq->generic.first = 0; + } else { + done = true; + } + } + spin_unlock_irqrestore(&queue->lock, flags); + return IRQ_HANDLED; +} + +static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) +{ + struct vio_dev *vdev = adapter->vdev; + int rc; + + do { + rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); + } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); + + if (rc) + dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); + + return rc; +} + +static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) +{ + struct ibmvnic_crq_queue *crq = &adapter->crq; + struct device *dev = &adapter->vdev->dev; + struct vio_dev *vdev = adapter->vdev; + int rc; + + /* Close the CRQ */ + do { + rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); + } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); + + /* Clean out the queue */ + memset(crq->msgs, 0, PAGE_SIZE); + crq->cur = 0; + + /* And re-open it again */ + rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, + crq->msg_token, PAGE_SIZE); + + if (rc == H_CLOSED) + /* Adapter is good, but other end is not ready */ + dev_warn(dev, "Partner adapter not ready\n"); + else if (rc != 0) + dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); + + return rc; +} + +static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter) +{ + struct ibmvnic_crq_queue *crq = &adapter->crq; + struct vio_dev *vdev = adapter->vdev; + long rc; + + netdev_dbg(adapter->netdev, "Releasing CRQ\n"); + free_irq(vdev->irq, adapter); + do { + rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); + } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); + + dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, + DMA_BIDIRECTIONAL); + free_page((unsigned long)crq->msgs); +} + +static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter) +{ + struct ibmvnic_crq_queue *crq = &adapter->crq; + struct device *dev = &adapter->vdev->dev; + struct vio_dev *vdev = adapter->vdev; + int rc, retrc = -ENOMEM; + + crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); + /* Should we allocate more than one page? */ + + if (!crq->msgs) + return -ENOMEM; + + crq->size = PAGE_SIZE / sizeof(*crq->msgs); + crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, + DMA_BIDIRECTIONAL); + if (dma_mapping_error(dev, crq->msg_token)) + goto map_failed; + + rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, + crq->msg_token, PAGE_SIZE); + + if (rc == H_RESOURCE) + /* maybe kexecing and resource is busy. try a reset */ + rc = ibmvnic_reset_crq(adapter); + retrc = rc; + + if (rc == H_CLOSED) { + dev_warn(dev, "Partner adapter not ready\n"); + } else if (rc) { + dev_warn(dev, "Error %d opening adapter\n", rc); + goto reg_crq_failed; + } + + retrc = 0; + + netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); + rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME, + adapter); + if (rc) { + dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", + vdev->irq, rc); + goto req_irq_failed; + } + + rc = vio_enable_interrupts(vdev); + if (rc) { + dev_err(dev, "Error %d enabling interrupts\n", rc); + goto req_irq_failed; + } + + crq->cur = 0; + spin_lock_init(&crq->lock); + + return retrc; + +req_irq_failed: + do { + rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); + } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); +reg_crq_failed: + dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); +map_failed: + free_page((unsigned long)crq->msgs); + return retrc; +} + +/* debugfs for dump */ +static int ibmvnic_dump_show(struct seq_file *seq, void *v) +{ + struct net_device *netdev = seq->private; + struct ibmvnic_adapter *adapter = netdev_priv(netdev); + struct device *dev = &adapter->vdev->dev; + union ibmvnic_crq crq; + + memset(&crq, 0, sizeof(crq)); + crq.request_dump_size.first = IBMVNIC_CRQ_CMD; + crq.request_dump_size.cmd = REQUEST_DUMP_SIZE; + ibmvnic_send_crq(adapter, &crq); + + init_completion(&adapter->fw_done); + wait_for_completion(&adapter->fw_done); + + seq_write(seq, adapter->dump_data, adapter->dump_data_size); + + dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size, + DMA_BIDIRECTIONAL); + + kfree(adapter->dump_data); + + return 0; +} + +static int ibmvnic_dump_open(struct inode *inode, struct file *file) +{ + return single_open(file, ibmvnic_dump_show, inode->i_private); +} + +static const struct file_operations ibmvnic_dump_ops = { + .owner = THIS_MODULE, + .open = ibmvnic_dump_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static 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; + struct dentry *ent; + char buf[16]; /* debugfs name buf */ + int rc; + + dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", + dev->unit_address); + + mac_addr_p = (unsigned char *)vio_get_attribute(dev, + VETH_MAC_ADDR, NULL); + if (!mac_addr_p) { + dev_err(&dev->dev, + "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", + __FILE__, __LINE__); + return 0; + } + + netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), + IBMVNIC_MAX_TX_QUEUES); + if (!netdev) + return -ENOMEM; + + adapter = netdev_priv(netdev); + dev_set_drvdata(&dev->dev, netdev); + adapter->vdev = dev; + adapter->netdev = netdev; + + 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); + + rc = ibmvnic_init_crq_queue(adapter); + if (rc) { + dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc); + goto free_netdev; + } + + INIT_LIST_HEAD(&adapter->errors); + INIT_LIST_HEAD(&adapter->inflight); + spin_lock_init(&adapter->error_list_lock); + spin_lock_init(&adapter->inflight_lock); + + adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats, + sizeof(struct ibmvnic_statistics), + DMA_FROM_DEVICE); + if (dma_mapping_error(&dev->dev, adapter->stats_token)) { + if (!firmware_has_feature(FW_FEATURE_CMO)) + dev_err(&dev->dev, "Couldn't map stats buffer\n"); + goto free_crq; + } + + snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address); + ent = debugfs_create_dir(buf, NULL); + if (!ent || IS_ERR(ent)) { + dev_info(&dev->dev, "debugfs create directory failed\n"); + adapter->debugfs_dir = NULL; + } else { + adapter->debugfs_dir = ent; + ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir, + netdev, &ibmvnic_dump_ops); + if (!ent || IS_ERR(ent)) { + dev_info(&dev->dev, + "debugfs create dump file failed\n"); + adapter->debugfs_dump = NULL; + } else { + adapter->debugfs_dump = ent; + } + } + ibmvnic_send_crq_init(adapter); + + init_completion(&adapter->init_done); + wait_for_completion(&adapter->init_done); + + /* needed to pull init_sub_crqs outside of an interrupt context + * because it creates IRQ mappings for the subCRQ queues, causing + * a kernel warning + */ + init_sub_crqs(adapter, 0); + + reinit_completion(&adapter->init_done); + wait_for_completion(&adapter->init_done); + + /* if init_sub_crqs is partially successful, retry */ + while (!adapter->tx_scrq || !adapter->rx_scrq) { + init_sub_crqs(adapter, 1); + + reinit_completion(&adapter->init_done); + wait_for_completion(&adapter->init_done); + } + + netdev->real_num_tx_queues = adapter->req_tx_queues; + + rc = register_netdev(netdev); + if (rc) { + dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); + goto free_debugfs; + } + dev_info(&dev->dev, "ibmvnic registered\n"); + + return 0; + +free_debugfs: + if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir)) + debugfs_remove_recursive(adapter->debugfs_dir); +free_crq: + ibmvnic_release_crq_queue(adapter); +free_netdev: + free_netdev(netdev); + return rc; +} + +static int ibmvnic_remove(struct vio_dev *dev) +{ + struct net_device *netdev = dev_get_drvdata(&dev->dev); + struct ibmvnic_adapter *adapter = netdev_priv(netdev); + + unregister_netdev(netdev); + + release_sub_crqs(adapter); + + ibmvnic_release_crq_queue(adapter); + + if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir)) + debugfs_remove_recursive(adapter->debugfs_dir); + + if (adapter->ras_comps) + dma_free_coherent(&dev->dev, + adapter->ras_comp_num * + sizeof(struct ibmvnic_fw_component), + adapter->ras_comps, adapter->ras_comps_tok); + + kfree(adapter->ras_comp_int); + + free_netdev(netdev); + dev_set_drvdata(&dev->dev, NULL); + + return 0; +} + +static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) +{ + struct net_device *netdev = dev_get_drvdata(&vdev->dev); + struct ibmvnic_adapter *adapter; + struct iommu_table *tbl; + unsigned long ret = 0; + int i; + + tbl = get_iommu_table_base(&vdev->dev); + + /* netdev inits at probe time along with the structures we need below*/ + if (!netdev) + return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); + + adapter = netdev_priv(netdev); + + ret += PAGE_SIZE; /* the crq message queue */ + ret += adapter->bounce_buffer_size; + ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); + + for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) + ret += 4 * PAGE_SIZE; /* the scrq message queue */ + + for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); + i++) + ret += adapter->rx_pool[i].size * + IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); + + return ret; +} + +static int ibmvnic_resume(struct device *dev) +{ + struct net_device *netdev = dev_get_drvdata(dev); + struct ibmvnic_adapter *adapter = netdev_priv(netdev); + int i; + + /* kick the interrupt handlers just in case we lost an interrupt */ + for (i = 0; i < adapter->req_rx_queues; i++) + ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, + adapter->rx_scrq[i]); + + return 0; +} + +static struct vio_device_id ibmvnic_device_table[] = { + {"network", "IBM,vnic"}, + {"", "" } +}; +MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); + +static const struct dev_pm_ops ibmvnic_pm_ops = { + .resume = ibmvnic_resume +}; + +static struct vio_driver ibmvnic_driver = { + .id_table = ibmvnic_device_table, + .probe = ibmvnic_probe, + .remove = ibmvnic_remove, + .get_desired_dma = ibmvnic_get_desired_dma, + .name = ibmvnic_driver_name, + .pm = &ibmvnic_pm_ops, +}; + +/* module functions */ +static int __init ibmvnic_module_init(void) +{ + pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, + IBMVNIC_DRIVER_VERSION); + + return vio_register_driver(&ibmvnic_driver); +} + +static void __exit ibmvnic_module_exit(void) +{ + vio_unregister_driver(&ibmvnic_driver); +} + +module_init(ibmvnic_module_init); +module_exit(ibmvnic_module_exit); |