| /* QLogic qed NIC Driver |
| * Copyright (c) 2015 QLogic Corporation |
| * |
| * This software is available under the terms of the GNU General Public License |
| * (GPL) Version 2, available from the file COPYING in the main directory of |
| * this source tree. |
| */ |
| |
| #include <linux/types.h> |
| #include <asm/byteorder.h> |
| #include <linux/io.h> |
| #include <linux/delay.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/errno.h> |
| #include <linux/kernel.h> |
| #include <linux/list.h> |
| #include <linux/pci.h> |
| #include <linux/slab.h> |
| #include <linux/spinlock.h> |
| #include <linux/string.h> |
| #include "qed.h" |
| #include "qed_cxt.h" |
| #include "qed_dev_api.h" |
| #include "qed_hsi.h" |
| #include "qed_hw.h" |
| #include "qed_int.h" |
| #include "qed_mcp.h" |
| #include "qed_reg_addr.h" |
| #include "qed_sp.h" |
| |
| /*************************************************************************** |
| * Structures & Definitions |
| ***************************************************************************/ |
| |
| #define SPQ_HIGH_PRI_RESERVE_DEFAULT (1) |
| #define SPQ_BLOCK_SLEEP_LENGTH (1000) |
| |
| /*************************************************************************** |
| * Blocking Imp. (BLOCK/EBLOCK mode) |
| ***************************************************************************/ |
| static void qed_spq_blocking_cb(struct qed_hwfn *p_hwfn, |
| void *cookie, |
| union event_ring_data *data, |
| u8 fw_return_code) |
| { |
| struct qed_spq_comp_done *comp_done; |
| |
| comp_done = (struct qed_spq_comp_done *)cookie; |
| |
| comp_done->done = 0x1; |
| comp_done->fw_return_code = fw_return_code; |
| |
| /* make update visible to waiting thread */ |
| smp_wmb(); |
| } |
| |
| static int qed_spq_block(struct qed_hwfn *p_hwfn, |
| struct qed_spq_entry *p_ent, |
| u8 *p_fw_ret) |
| { |
| int sleep_count = SPQ_BLOCK_SLEEP_LENGTH; |
| struct qed_spq_comp_done *comp_done; |
| int rc; |
| |
| comp_done = (struct qed_spq_comp_done *)p_ent->comp_cb.cookie; |
| while (sleep_count) { |
| /* validate we receive completion update */ |
| smp_rmb(); |
| if (comp_done->done == 1) { |
| if (p_fw_ret) |
| *p_fw_ret = comp_done->fw_return_code; |
| return 0; |
| } |
| usleep_range(5000, 10000); |
| sleep_count--; |
| } |
| |
| DP_INFO(p_hwfn, "Ramrod is stuck, requesting MCP drain\n"); |
| rc = qed_mcp_drain(p_hwfn, p_hwfn->p_main_ptt); |
| if (rc != 0) |
| DP_NOTICE(p_hwfn, "MCP drain failed\n"); |
| |
| /* Retry after drain */ |
| sleep_count = SPQ_BLOCK_SLEEP_LENGTH; |
| while (sleep_count) { |
| /* validate we receive completion update */ |
| smp_rmb(); |
| if (comp_done->done == 1) { |
| if (p_fw_ret) |
| *p_fw_ret = comp_done->fw_return_code; |
| return 0; |
| } |
| usleep_range(5000, 10000); |
| sleep_count--; |
| } |
| |
| if (comp_done->done == 1) { |
| if (p_fw_ret) |
| *p_fw_ret = comp_done->fw_return_code; |
| return 0; |
| } |
| |
| DP_NOTICE(p_hwfn, "Ramrod is stuck, MCP drain failed\n"); |
| |
| return -EBUSY; |
| } |
| |
| /*************************************************************************** |
| * SPQ entries inner API |
| ***************************************************************************/ |
| static int |
| qed_spq_fill_entry(struct qed_hwfn *p_hwfn, |
| struct qed_spq_entry *p_ent) |
| { |
| p_ent->flags = 0; |
| |
| switch (p_ent->comp_mode) { |
| case QED_SPQ_MODE_EBLOCK: |
| case QED_SPQ_MODE_BLOCK: |
| p_ent->comp_cb.function = qed_spq_blocking_cb; |
| break; |
| case QED_SPQ_MODE_CB: |
| break; |
| default: |
| DP_NOTICE(p_hwfn, "Unknown SPQE completion mode %d\n", |
| p_ent->comp_mode); |
| return -EINVAL; |
| } |
| |
| DP_VERBOSE(p_hwfn, QED_MSG_SPQ, |
| "Ramrod header: [CID 0x%08x CMD 0x%02x protocol 0x%02x] Data pointer: [%08x:%08x] Completion Mode: %s\n", |
| p_ent->elem.hdr.cid, |
| p_ent->elem.hdr.cmd_id, |
| p_ent->elem.hdr.protocol_id, |
| p_ent->elem.data_ptr.hi, |
| p_ent->elem.data_ptr.lo, |
| D_TRINE(p_ent->comp_mode, QED_SPQ_MODE_EBLOCK, |
| QED_SPQ_MODE_BLOCK, "MODE_EBLOCK", "MODE_BLOCK", |
| "MODE_CB")); |
| |
| return 0; |
| } |
| |
| /*************************************************************************** |
| * HSI access |
| ***************************************************************************/ |
| static void qed_spq_hw_initialize(struct qed_hwfn *p_hwfn, |
| struct qed_spq *p_spq) |
| { |
| u16 pq; |
| struct qed_cxt_info cxt_info; |
| struct core_conn_context *p_cxt; |
| union qed_qm_pq_params pq_params; |
| int rc; |
| |
| cxt_info.iid = p_spq->cid; |
| |
| rc = qed_cxt_get_cid_info(p_hwfn, &cxt_info); |
| |
| if (rc < 0) { |
| DP_NOTICE(p_hwfn, "Cannot find context info for cid=%d\n", |
| p_spq->cid); |
| return; |
| } |
| |
| p_cxt = cxt_info.p_cxt; |
| |
| SET_FIELD(p_cxt->xstorm_ag_context.flags10, |
| XSTORM_CORE_CONN_AG_CTX_DQ_CF_EN, 1); |
| SET_FIELD(p_cxt->xstorm_ag_context.flags1, |
| XSTORM_CORE_CONN_AG_CTX_DQ_CF_ACTIVE, 1); |
| SET_FIELD(p_cxt->xstorm_ag_context.flags9, |
| XSTORM_CORE_CONN_AG_CTX_CONSOLID_PROD_CF_EN, 1); |
| |
| /* QM physical queue */ |
| memset(&pq_params, 0, sizeof(pq_params)); |
| pq_params.core.tc = LB_TC; |
| pq = qed_get_qm_pq(p_hwfn, PROTOCOLID_CORE, &pq_params); |
| p_cxt->xstorm_ag_context.physical_q0 = cpu_to_le16(pq); |
| |
| p_cxt->xstorm_st_context.spq_base_lo = |
| DMA_LO_LE(p_spq->chain.p_phys_addr); |
| p_cxt->xstorm_st_context.spq_base_hi = |
| DMA_HI_LE(p_spq->chain.p_phys_addr); |
| |
| p_cxt->xstorm_st_context.consolid_base_addr.lo = |
| DMA_LO_LE(p_hwfn->p_consq->chain.p_phys_addr); |
| p_cxt->xstorm_st_context.consolid_base_addr.hi = |
| DMA_HI_LE(p_hwfn->p_consq->chain.p_phys_addr); |
| } |
| |
| static int qed_spq_hw_post(struct qed_hwfn *p_hwfn, |
| struct qed_spq *p_spq, |
| struct qed_spq_entry *p_ent) |
| { |
| struct qed_chain *p_chain = &p_hwfn->p_spq->chain; |
| u16 echo = qed_chain_get_prod_idx(p_chain); |
| struct slow_path_element *elem; |
| struct core_db_data db; |
| |
| p_ent->elem.hdr.echo = cpu_to_le16(echo); |
| elem = qed_chain_produce(p_chain); |
| if (!elem) { |
| DP_NOTICE(p_hwfn, "Failed to produce from SPQ chain\n"); |
| return -EINVAL; |
| } |
| |
| *elem = p_ent->elem; /* struct assignment */ |
| |
| /* send a doorbell on the slow hwfn session */ |
| memset(&db, 0, sizeof(db)); |
| SET_FIELD(db.params, CORE_DB_DATA_DEST, DB_DEST_XCM); |
| SET_FIELD(db.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET); |
| SET_FIELD(db.params, CORE_DB_DATA_AGG_VAL_SEL, |
| DQ_XCM_CORE_SPQ_PROD_CMD); |
| db.agg_flags = DQ_XCM_CORE_DQ_CF_CMD; |
| |
| /* validate producer is up to-date */ |
| rmb(); |
| |
| db.spq_prod = cpu_to_le16(qed_chain_get_prod_idx(p_chain)); |
| |
| /* do not reorder */ |
| barrier(); |
| |
| DOORBELL(p_hwfn, qed_db_addr(p_spq->cid, DQ_DEMS_LEGACY), *(u32 *)&db); |
| |
| /* make sure doorbell is rang */ |
| mmiowb(); |
| |
| DP_VERBOSE(p_hwfn, QED_MSG_SPQ, |
| "Doorbelled [0x%08x, CID 0x%08x] with Flags: %02x agg_params: %02x, prod: %04x\n", |
| qed_db_addr(p_spq->cid, DQ_DEMS_LEGACY), |
| p_spq->cid, db.params, db.agg_flags, |
| qed_chain_get_prod_idx(p_chain)); |
| |
| return 0; |
| } |
| |
| /*************************************************************************** |
| * Asynchronous events |
| ***************************************************************************/ |
| static int |
| qed_async_event_completion(struct qed_hwfn *p_hwfn, |
| struct event_ring_entry *p_eqe) |
| { |
| DP_NOTICE(p_hwfn, |
| "Unknown Async completion for protocol: %d\n", |
| p_eqe->protocol_id); |
| return -EINVAL; |
| } |
| |
| /*************************************************************************** |
| * EQ API |
| ***************************************************************************/ |
| void qed_eq_prod_update(struct qed_hwfn *p_hwfn, |
| u16 prod) |
| { |
| u32 addr = GTT_BAR0_MAP_REG_USDM_RAM + |
| USTORM_EQE_CONS_OFFSET(p_hwfn->rel_pf_id); |
| |
| REG_WR16(p_hwfn, addr, prod); |
| |
| /* keep prod updates ordered */ |
| mmiowb(); |
| } |
| |
| int qed_eq_completion(struct qed_hwfn *p_hwfn, |
| void *cookie) |
| |
| { |
| struct qed_eq *p_eq = cookie; |
| struct qed_chain *p_chain = &p_eq->chain; |
| int rc = 0; |
| |
| /* take a snapshot of the FW consumer */ |
| u16 fw_cons_idx = le16_to_cpu(*p_eq->p_fw_cons); |
| |
| DP_VERBOSE(p_hwfn, QED_MSG_SPQ, "fw_cons_idx %x\n", fw_cons_idx); |
| |
| /* Need to guarantee the fw_cons index we use points to a usuable |
| * element (to comply with our chain), so our macros would comply |
| */ |
| if ((fw_cons_idx & qed_chain_get_usable_per_page(p_chain)) == |
| qed_chain_get_usable_per_page(p_chain)) |
| fw_cons_idx += qed_chain_get_unusable_per_page(p_chain); |
| |
| /* Complete current segment of eq entries */ |
| while (fw_cons_idx != qed_chain_get_cons_idx(p_chain)) { |
| struct event_ring_entry *p_eqe = qed_chain_consume(p_chain); |
| |
| if (!p_eqe) { |
| rc = -EINVAL; |
| break; |
| } |
| |
| DP_VERBOSE(p_hwfn, QED_MSG_SPQ, |
| "op %x prot %x res0 %x echo %x fwret %x flags %x\n", |
| p_eqe->opcode, |
| p_eqe->protocol_id, |
| p_eqe->reserved0, |
| le16_to_cpu(p_eqe->echo), |
| p_eqe->fw_return_code, |
| p_eqe->flags); |
| |
| if (GET_FIELD(p_eqe->flags, EVENT_RING_ENTRY_ASYNC)) { |
| if (qed_async_event_completion(p_hwfn, p_eqe)) |
| rc = -EINVAL; |
| } else if (qed_spq_completion(p_hwfn, |
| p_eqe->echo, |
| p_eqe->fw_return_code, |
| &p_eqe->data)) { |
| rc = -EINVAL; |
| } |
| |
| qed_chain_recycle_consumed(p_chain); |
| } |
| |
| qed_eq_prod_update(p_hwfn, qed_chain_get_prod_idx(p_chain)); |
| |
| return rc; |
| } |
| |
| struct qed_eq *qed_eq_alloc(struct qed_hwfn *p_hwfn, |
| u16 num_elem) |
| { |
| struct qed_eq *p_eq; |
| |
| /* Allocate EQ struct */ |
| p_eq = kzalloc(sizeof(*p_eq), GFP_ATOMIC); |
| if (!p_eq) { |
| DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_eq'\n"); |
| return NULL; |
| } |
| |
| /* Allocate and initialize EQ chain*/ |
| if (qed_chain_alloc(p_hwfn->cdev, |
| QED_CHAIN_USE_TO_PRODUCE, |
| QED_CHAIN_MODE_PBL, |
| num_elem, |
| sizeof(union event_ring_element), |
| &p_eq->chain)) { |
| DP_NOTICE(p_hwfn, "Failed to allocate eq chain\n"); |
| goto eq_allocate_fail; |
| } |
| |
| /* register EQ completion on the SP SB */ |
| qed_int_register_cb(p_hwfn, |
| qed_eq_completion, |
| p_eq, |
| &p_eq->eq_sb_index, |
| &p_eq->p_fw_cons); |
| |
| return p_eq; |
| |
| eq_allocate_fail: |
| qed_eq_free(p_hwfn, p_eq); |
| return NULL; |
| } |
| |
| void qed_eq_setup(struct qed_hwfn *p_hwfn, |
| struct qed_eq *p_eq) |
| { |
| qed_chain_reset(&p_eq->chain); |
| } |
| |
| void qed_eq_free(struct qed_hwfn *p_hwfn, |
| struct qed_eq *p_eq) |
| { |
| if (!p_eq) |
| return; |
| qed_chain_free(p_hwfn->cdev, &p_eq->chain); |
| kfree(p_eq); |
| } |
| |
| /*************************************************************************** |
| * CQE API - manipulate EQ functionality |
| ***************************************************************************/ |
| static int qed_cqe_completion( |
| struct qed_hwfn *p_hwfn, |
| struct eth_slow_path_rx_cqe *cqe, |
| enum protocol_type protocol) |
| { |
| /* @@@tmp - it's possible we'll eventually want to handle some |
| * actual commands that can arrive here, but for now this is only |
| * used to complete the ramrod using the echo value on the cqe |
| */ |
| return qed_spq_completion(p_hwfn, cqe->echo, 0, NULL); |
| } |
| |
| int qed_eth_cqe_completion(struct qed_hwfn *p_hwfn, |
| struct eth_slow_path_rx_cqe *cqe) |
| { |
| int rc; |
| |
| rc = qed_cqe_completion(p_hwfn, cqe, PROTOCOLID_ETH); |
| if (rc) |
| DP_NOTICE(p_hwfn, |
| "Failed to handle RXQ CQE [cmd 0x%02x]\n", |
| cqe->ramrod_cmd_id); |
| |
| return rc; |
| } |
| |
| /*************************************************************************** |
| * Slow hwfn Queue (spq) |
| ***************************************************************************/ |
| void qed_spq_setup(struct qed_hwfn *p_hwfn) |
| { |
| struct qed_spq *p_spq = p_hwfn->p_spq; |
| struct qed_spq_entry *p_virt = NULL; |
| dma_addr_t p_phys = 0; |
| unsigned int i = 0; |
| |
| INIT_LIST_HEAD(&p_spq->pending); |
| INIT_LIST_HEAD(&p_spq->completion_pending); |
| INIT_LIST_HEAD(&p_spq->free_pool); |
| INIT_LIST_HEAD(&p_spq->unlimited_pending); |
| spin_lock_init(&p_spq->lock); |
| |
| /* SPQ empty pool */ |
| p_phys = p_spq->p_phys + offsetof(struct qed_spq_entry, ramrod); |
| p_virt = p_spq->p_virt; |
| |
| for (i = 0; i < p_spq->chain.capacity; i++) { |
| p_virt->elem.data_ptr.hi = DMA_HI_LE(p_phys); |
| p_virt->elem.data_ptr.lo = DMA_LO_LE(p_phys); |
| |
| list_add_tail(&p_virt->list, &p_spq->free_pool); |
| |
| p_virt++; |
| p_phys += sizeof(struct qed_spq_entry); |
| } |
| |
| /* Statistics */ |
| p_spq->normal_count = 0; |
| p_spq->comp_count = 0; |
| p_spq->comp_sent_count = 0; |
| p_spq->unlimited_pending_count = 0; |
| |
| bitmap_zero(p_spq->p_comp_bitmap, SPQ_RING_SIZE); |
| p_spq->comp_bitmap_idx = 0; |
| |
| /* SPQ cid, cannot fail */ |
| qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_spq->cid); |
| qed_spq_hw_initialize(p_hwfn, p_spq); |
| |
| /* reset the chain itself */ |
| qed_chain_reset(&p_spq->chain); |
| } |
| |
| int qed_spq_alloc(struct qed_hwfn *p_hwfn) |
| { |
| struct qed_spq *p_spq = NULL; |
| dma_addr_t p_phys = 0; |
| struct qed_spq_entry *p_virt = NULL; |
| |
| /* SPQ struct */ |
| p_spq = |
| kzalloc(sizeof(struct qed_spq), GFP_ATOMIC); |
| if (!p_spq) { |
| DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_spq'\n"); |
| return -ENOMEM; |
| } |
| |
| /* SPQ ring */ |
| if (qed_chain_alloc(p_hwfn->cdev, |
| QED_CHAIN_USE_TO_PRODUCE, |
| QED_CHAIN_MODE_SINGLE, |
| 0, /* N/A when the mode is SINGLE */ |
| sizeof(struct slow_path_element), |
| &p_spq->chain)) { |
| DP_NOTICE(p_hwfn, "Failed to allocate spq chain\n"); |
| goto spq_allocate_fail; |
| } |
| |
| /* allocate and fill the SPQ elements (incl. ramrod data list) */ |
| p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev, |
| p_spq->chain.capacity * |
| sizeof(struct qed_spq_entry), |
| &p_phys, |
| GFP_KERNEL); |
| |
| if (!p_virt) |
| goto spq_allocate_fail; |
| |
| p_spq->p_virt = p_virt; |
| p_spq->p_phys = p_phys; |
| p_hwfn->p_spq = p_spq; |
| |
| return 0; |
| |
| spq_allocate_fail: |
| qed_chain_free(p_hwfn->cdev, &p_spq->chain); |
| kfree(p_spq); |
| return -ENOMEM; |
| } |
| |
| void qed_spq_free(struct qed_hwfn *p_hwfn) |
| { |
| struct qed_spq *p_spq = p_hwfn->p_spq; |
| |
| if (!p_spq) |
| return; |
| |
| if (p_spq->p_virt) |
| dma_free_coherent(&p_hwfn->cdev->pdev->dev, |
| p_spq->chain.capacity * |
| sizeof(struct qed_spq_entry), |
| p_spq->p_virt, |
| p_spq->p_phys); |
| |
| qed_chain_free(p_hwfn->cdev, &p_spq->chain); |
| ; |
| kfree(p_spq); |
| } |
| |
| int |
| qed_spq_get_entry(struct qed_hwfn *p_hwfn, |
| struct qed_spq_entry **pp_ent) |
| { |
| struct qed_spq *p_spq = p_hwfn->p_spq; |
| struct qed_spq_entry *p_ent = NULL; |
| int rc = 0; |
| |
| spin_lock_bh(&p_spq->lock); |
| |
| if (list_empty(&p_spq->free_pool)) { |
| p_ent = kzalloc(sizeof(*p_ent), GFP_ATOMIC); |
| if (!p_ent) { |
| rc = -ENOMEM; |
| goto out_unlock; |
| } |
| p_ent->queue = &p_spq->unlimited_pending; |
| } else { |
| p_ent = list_first_entry(&p_spq->free_pool, |
| struct qed_spq_entry, |
| list); |
| list_del(&p_ent->list); |
| p_ent->queue = &p_spq->pending; |
| } |
| |
| *pp_ent = p_ent; |
| |
| out_unlock: |
| spin_unlock_bh(&p_spq->lock); |
| return rc; |
| } |
| |
| /* Locked variant; Should be called while the SPQ lock is taken */ |
| static void __qed_spq_return_entry(struct qed_hwfn *p_hwfn, |
| struct qed_spq_entry *p_ent) |
| { |
| list_add_tail(&p_ent->list, &p_hwfn->p_spq->free_pool); |
| } |
| |
| void qed_spq_return_entry(struct qed_hwfn *p_hwfn, |
| struct qed_spq_entry *p_ent) |
| { |
| spin_lock_bh(&p_hwfn->p_spq->lock); |
| __qed_spq_return_entry(p_hwfn, p_ent); |
| spin_unlock_bh(&p_hwfn->p_spq->lock); |
| } |
| |
| /** |
| * @brief qed_spq_add_entry - adds a new entry to the pending |
| * list. Should be used while lock is being held. |
| * |
| * Addes an entry to the pending list is there is room (en empty |
| * element is available in the free_pool), or else places the |
| * entry in the unlimited_pending pool. |
| * |
| * @param p_hwfn |
| * @param p_ent |
| * @param priority |
| * |
| * @return int |
| */ |
| static int |
| qed_spq_add_entry(struct qed_hwfn *p_hwfn, |
| struct qed_spq_entry *p_ent, |
| enum spq_priority priority) |
| { |
| struct qed_spq *p_spq = p_hwfn->p_spq; |
| |
| if (p_ent->queue == &p_spq->unlimited_pending) { |
| |
| if (list_empty(&p_spq->free_pool)) { |
| list_add_tail(&p_ent->list, &p_spq->unlimited_pending); |
| p_spq->unlimited_pending_count++; |
| |
| return 0; |
| } else { |
| struct qed_spq_entry *p_en2; |
| |
| p_en2 = list_first_entry(&p_spq->free_pool, |
| struct qed_spq_entry, |
| list); |
| list_del(&p_en2->list); |
| |
| /* Copy the ring element physical pointer to the new |
| * entry, since we are about to override the entire ring |
| * entry and don't want to lose the pointer. |
| */ |
| p_ent->elem.data_ptr = p_en2->elem.data_ptr; |
| |
| *p_en2 = *p_ent; |
| |
| kfree(p_ent); |
| |
| p_ent = p_en2; |
| } |
| } |
| |
| /* entry is to be placed in 'pending' queue */ |
| switch (priority) { |
| case QED_SPQ_PRIORITY_NORMAL: |
| list_add_tail(&p_ent->list, &p_spq->pending); |
| p_spq->normal_count++; |
| break; |
| case QED_SPQ_PRIORITY_HIGH: |
| list_add(&p_ent->list, &p_spq->pending); |
| p_spq->high_count++; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| /*************************************************************************** |
| * Accessor |
| ***************************************************************************/ |
| u32 qed_spq_get_cid(struct qed_hwfn *p_hwfn) |
| { |
| if (!p_hwfn->p_spq) |
| return 0xffffffff; /* illegal */ |
| return p_hwfn->p_spq->cid; |
| } |
| |
| /*************************************************************************** |
| * Posting new Ramrods |
| ***************************************************************************/ |
| static int qed_spq_post_list(struct qed_hwfn *p_hwfn, |
| struct list_head *head, |
| u32 keep_reserve) |
| { |
| struct qed_spq *p_spq = p_hwfn->p_spq; |
| int rc; |
| |
| while (qed_chain_get_elem_left(&p_spq->chain) > keep_reserve && |
| !list_empty(head)) { |
| struct qed_spq_entry *p_ent = |
| list_first_entry(head, struct qed_spq_entry, list); |
| list_del(&p_ent->list); |
| list_add_tail(&p_ent->list, &p_spq->completion_pending); |
| p_spq->comp_sent_count++; |
| |
| rc = qed_spq_hw_post(p_hwfn, p_spq, p_ent); |
| if (rc) { |
| list_del(&p_ent->list); |
| __qed_spq_return_entry(p_hwfn, p_ent); |
| return rc; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int qed_spq_pend_post(struct qed_hwfn *p_hwfn) |
| { |
| struct qed_spq *p_spq = p_hwfn->p_spq; |
| struct qed_spq_entry *p_ent = NULL; |
| |
| while (!list_empty(&p_spq->free_pool)) { |
| if (list_empty(&p_spq->unlimited_pending)) |
| break; |
| |
| p_ent = list_first_entry(&p_spq->unlimited_pending, |
| struct qed_spq_entry, |
| list); |
| if (!p_ent) |
| return -EINVAL; |
| |
| list_del(&p_ent->list); |
| |
| qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); |
| } |
| |
| return qed_spq_post_list(p_hwfn, &p_spq->pending, |
| SPQ_HIGH_PRI_RESERVE_DEFAULT); |
| } |
| |
| int qed_spq_post(struct qed_hwfn *p_hwfn, |
| struct qed_spq_entry *p_ent, |
| u8 *fw_return_code) |
| { |
| int rc = 0; |
| struct qed_spq *p_spq = p_hwfn ? p_hwfn->p_spq : NULL; |
| bool b_ret_ent = true; |
| |
| if (!p_hwfn) |
| return -EINVAL; |
| |
| if (!p_ent) { |
| DP_NOTICE(p_hwfn, "Got a NULL pointer\n"); |
| return -EINVAL; |
| } |
| |
| /* Complete the entry */ |
| rc = qed_spq_fill_entry(p_hwfn, p_ent); |
| |
| spin_lock_bh(&p_spq->lock); |
| |
| /* Check return value after LOCK is taken for cleaner error flow */ |
| if (rc) |
| goto spq_post_fail; |
| |
| /* Add the request to the pending queue */ |
| rc = qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); |
| if (rc) |
| goto spq_post_fail; |
| |
| rc = qed_spq_pend_post(p_hwfn); |
| if (rc) { |
| /* Since it's possible that pending failed for a different |
| * entry [although unlikely], the failed entry was already |
| * dealt with; No need to return it here. |
| */ |
| b_ret_ent = false; |
| goto spq_post_fail; |
| } |
| |
| spin_unlock_bh(&p_spq->lock); |
| |
| if (p_ent->comp_mode == QED_SPQ_MODE_EBLOCK) { |
| /* For entries in QED BLOCK mode, the completion code cannot |
| * perform the necessary cleanup - if it did, we couldn't |
| * access p_ent here to see whether it's successful or not. |
| * Thus, after gaining the answer perform the cleanup here. |
| */ |
| rc = qed_spq_block(p_hwfn, p_ent, fw_return_code); |
| if (rc) |
| goto spq_post_fail2; |
| |
| /* return to pool */ |
| qed_spq_return_entry(p_hwfn, p_ent); |
| } |
| return rc; |
| |
| spq_post_fail2: |
| spin_lock_bh(&p_spq->lock); |
| list_del(&p_ent->list); |
| qed_chain_return_produced(&p_spq->chain); |
| |
| spq_post_fail: |
| /* return to the free pool */ |
| if (b_ret_ent) |
| __qed_spq_return_entry(p_hwfn, p_ent); |
| spin_unlock_bh(&p_spq->lock); |
| |
| return rc; |
| } |
| |
| int qed_spq_completion(struct qed_hwfn *p_hwfn, |
| __le16 echo, |
| u8 fw_return_code, |
| union event_ring_data *p_data) |
| { |
| struct qed_spq *p_spq; |
| struct qed_spq_entry *p_ent = NULL; |
| struct qed_spq_entry *tmp; |
| struct qed_spq_entry *found = NULL; |
| int rc; |
| |
| if (!p_hwfn) |
| return -EINVAL; |
| |
| p_spq = p_hwfn->p_spq; |
| if (!p_spq) |
| return -EINVAL; |
| |
| spin_lock_bh(&p_spq->lock); |
| list_for_each_entry_safe(p_ent, tmp, &p_spq->completion_pending, |
| list) { |
| if (p_ent->elem.hdr.echo == echo) { |
| u16 pos = le16_to_cpu(echo) % SPQ_RING_SIZE; |
| |
| list_del(&p_ent->list); |
| |
| /* Avoid overriding of SPQ entries when getting |
| * out-of-order completions, by marking the completions |
| * in a bitmap and increasing the chain consumer only |
| * for the first successive completed entries. |
| */ |
| __set_bit(pos, p_spq->p_comp_bitmap); |
| |
| while (test_bit(p_spq->comp_bitmap_idx, |
| p_spq->p_comp_bitmap)) { |
| __clear_bit(p_spq->comp_bitmap_idx, |
| p_spq->p_comp_bitmap); |
| p_spq->comp_bitmap_idx++; |
| qed_chain_return_produced(&p_spq->chain); |
| } |
| |
| p_spq->comp_count++; |
| found = p_ent; |
| break; |
| } |
| |
| /* This is relatively uncommon - depends on scenarios |
| * which have mutliple per-PF sent ramrods. |
| */ |
| DP_VERBOSE(p_hwfn, QED_MSG_SPQ, |
| "Got completion for echo %04x - doesn't match echo %04x in completion pending list\n", |
| le16_to_cpu(echo), |
| le16_to_cpu(p_ent->elem.hdr.echo)); |
| } |
| |
| /* Release lock before callback, as callback may post |
| * an additional ramrod. |
| */ |
| spin_unlock_bh(&p_spq->lock); |
| |
| if (!found) { |
| DP_NOTICE(p_hwfn, |
| "Failed to find an entry this EQE completes\n"); |
| return -EEXIST; |
| } |
| |
| DP_VERBOSE(p_hwfn, QED_MSG_SPQ, "Complete: func %p cookie %p)\n", |
| p_ent->comp_cb.function, p_ent->comp_cb.cookie); |
| if (found->comp_cb.function) |
| found->comp_cb.function(p_hwfn, found->comp_cb.cookie, p_data, |
| fw_return_code); |
| |
| if (found->comp_mode != QED_SPQ_MODE_EBLOCK) |
| /* EBLOCK is responsible for freeing its own entry */ |
| qed_spq_return_entry(p_hwfn, found); |
| |
| /* Attempt to post pending requests */ |
| spin_lock_bh(&p_spq->lock); |
| rc = qed_spq_pend_post(p_hwfn); |
| spin_unlock_bh(&p_spq->lock); |
| |
| return rc; |
| } |
| |
| struct qed_consq *qed_consq_alloc(struct qed_hwfn *p_hwfn) |
| { |
| struct qed_consq *p_consq; |
| |
| /* Allocate ConsQ struct */ |
| p_consq = kzalloc(sizeof(*p_consq), GFP_ATOMIC); |
| if (!p_consq) { |
| DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_consq'\n"); |
| return NULL; |
| } |
| |
| /* Allocate and initialize EQ chain*/ |
| if (qed_chain_alloc(p_hwfn->cdev, |
| QED_CHAIN_USE_TO_PRODUCE, |
| QED_CHAIN_MODE_PBL, |
| QED_CHAIN_PAGE_SIZE / 0x80, |
| 0x80, |
| &p_consq->chain)) { |
| DP_NOTICE(p_hwfn, "Failed to allocate consq chain"); |
| goto consq_allocate_fail; |
| } |
| |
| return p_consq; |
| |
| consq_allocate_fail: |
| qed_consq_free(p_hwfn, p_consq); |
| return NULL; |
| } |
| |
| void qed_consq_setup(struct qed_hwfn *p_hwfn, |
| struct qed_consq *p_consq) |
| { |
| qed_chain_reset(&p_consq->chain); |
| } |
| |
| void qed_consq_free(struct qed_hwfn *p_hwfn, |
| struct qed_consq *p_consq) |
| { |
| if (!p_consq) |
| return; |
| qed_chain_free(p_hwfn->cdev, &p_consq->chain); |
| kfree(p_consq); |
| } |