diff options
Diffstat (limited to 'drivers/net/qede/base/ecore_spq.c')
| -rw-r--r-- | drivers/net/qede/base/ecore_spq.c | 943 |
1 files changed, 943 insertions, 0 deletions
diff --git a/drivers/net/qede/base/ecore_spq.c b/drivers/net/qede/base/ecore_spq.c new file mode 100644 index 00000000..b263693f --- /dev/null +++ b/drivers/net/qede/base/ecore_spq.c @@ -0,0 +1,943 @@ +/* + * Copyright (c) 2016 QLogic Corporation. + * All rights reserved. + * www.qlogic.com + * + * See LICENSE.qede_pmd for copyright and licensing details. + */ + +#include "bcm_osal.h" +#include "reg_addr.h" +#include "ecore_gtt_reg_addr.h" +#include "ecore_hsi_common.h" +#include "ecore.h" +#include "ecore_sp_api.h" +#include "ecore_spq.h" +#include "ecore_iro.h" +#include "ecore_init_fw_funcs.h" +#include "ecore_cxt.h" +#include "ecore_int.h" +#include "ecore_dev_api.h" +#include "ecore_mcp.h" +#include "ecore_hw.h" +#include "ecore_sriov.h" + +/*************************************************************************** + * Structures & Definitions + ***************************************************************************/ + +#define SPQ_HIGH_PRI_RESERVE_DEFAULT (1) +#define SPQ_BLOCK_SLEEP_LENGTH (1000) + +/*************************************************************************** + * Blocking Imp. (BLOCK/EBLOCK mode) + ***************************************************************************/ +static void ecore_spq_blocking_cb(struct ecore_hwfn *p_hwfn, + void *cookie, + union event_ring_data *data, + u8 fw_return_code) +{ + struct ecore_spq_comp_done *comp_done; + + comp_done = (struct ecore_spq_comp_done *)cookie; + + comp_done->done = 0x1; + comp_done->fw_return_code = fw_return_code; + + /* make update visible to waiting thread */ + OSAL_SMP_WMB(p_hwfn->p_dev); +} + +static enum _ecore_status_t ecore_spq_block(struct ecore_hwfn *p_hwfn, + struct ecore_spq_entry *p_ent, + u8 *p_fw_ret) +{ + int sleep_count = SPQ_BLOCK_SLEEP_LENGTH; + struct ecore_spq_comp_done *comp_done; + enum _ecore_status_t rc; + + comp_done = (struct ecore_spq_comp_done *)p_ent->comp_cb.cookie; + while (sleep_count) { + OSAL_POLL_MODE_DPC(p_hwfn); + /* validate we receive completion update */ + OSAL_SMP_RMB(p_hwfn->p_dev); + if (comp_done->done == 1) { + if (p_fw_ret) + *p_fw_ret = comp_done->fw_return_code; + return ECORE_SUCCESS; + } + OSAL_MSLEEP(5); + sleep_count--; + } + + DP_INFO(p_hwfn, "Ramrod is stuck, requesting MCP drain\n"); + rc = ecore_mcp_drain(p_hwfn, p_hwfn->p_main_ptt); + if (rc != ECORE_SUCCESS) + DP_NOTICE(p_hwfn, true, "MCP drain failed\n"); + + /* Retry after drain */ + sleep_count = SPQ_BLOCK_SLEEP_LENGTH; + while (sleep_count) { + /* validate we receive completion update */ + OSAL_SMP_RMB(p_hwfn->p_dev); + if (comp_done->done == 1) { + if (p_fw_ret) + *p_fw_ret = comp_done->fw_return_code; + return ECORE_SUCCESS; + } + OSAL_MSLEEP(5); + sleep_count--; + } + + if (comp_done->done == 1) { + if (p_fw_ret) + *p_fw_ret = comp_done->fw_return_code; + return ECORE_SUCCESS; + } + + DP_NOTICE(p_hwfn, true, + "Ramrod is stuck [CID %08x cmd %02x proto %02x echo %04x]\n", + OSAL_LE32_TO_CPU(p_ent->elem.hdr.cid), + p_ent->elem.hdr.cmd_id, p_ent->elem.hdr.protocol_id, + OSAL_LE16_TO_CPU(p_ent->elem.hdr.echo)); + + ecore_hw_err_notify(p_hwfn, ECORE_HW_ERR_RAMROD_FAIL); + + return ECORE_BUSY; +} + +/*************************************************************************** + * SPQ entries inner API + ***************************************************************************/ +static enum _ecore_status_t +ecore_spq_fill_entry(struct ecore_hwfn *p_hwfn, struct ecore_spq_entry *p_ent) +{ + p_ent->flags = 0; + + switch (p_ent->comp_mode) { + case ECORE_SPQ_MODE_EBLOCK: + case ECORE_SPQ_MODE_BLOCK: + p_ent->comp_cb.function = ecore_spq_blocking_cb; + break; + case ECORE_SPQ_MODE_CB: + break; + default: + DP_NOTICE(p_hwfn, true, "Unknown SPQE completion mode %d\n", + p_ent->comp_mode); + return ECORE_INVAL; + } + + DP_VERBOSE(p_hwfn, ECORE_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, ECORE_SPQ_MODE_EBLOCK, + ECORE_SPQ_MODE_BLOCK, "MODE_EBLOCK", "MODE_BLOCK", + "MODE_CB")); + + return ECORE_SUCCESS; +} + +/*************************************************************************** + * HSI access + ***************************************************************************/ +static void ecore_spq_hw_initialize(struct ecore_hwfn *p_hwfn, + struct ecore_spq *p_spq) +{ + u16 pq; + struct ecore_cxt_info cxt_info; + struct core_conn_context *p_cxt; + union ecore_qm_pq_params pq_params; + enum _ecore_status_t rc; + + cxt_info.iid = p_spq->cid; + + rc = ecore_cxt_get_cid_info(p_hwfn, &cxt_info); + + if (rc < 0) { + DP_NOTICE(p_hwfn, true, "Cannot find context info for cid=%d", + 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.flags10, + * XSTORM_CORE_CONN_AG_CTX_SLOW_PATH_EN, 1); + */ + SET_FIELD(p_cxt->xstorm_ag_context.flags9, + XSTORM_CORE_CONN_AG_CTX_CONSOLID_PROD_CF_EN, 1); + + /* CDU validation - FIXME currently disabled */ + + /* QM physical queue */ + OSAL_MEMSET(&pq_params, 0, sizeof(pq_params)); + pq_params.core.tc = LB_TC; + pq = ecore_get_qm_pq(p_hwfn, PROTOCOLID_CORE, &pq_params); + p_cxt->xstorm_ag_context.physical_q0 = OSAL_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 enum _ecore_status_t ecore_spq_hw_post(struct ecore_hwfn *p_hwfn, + struct ecore_spq *p_spq, + struct ecore_spq_entry *p_ent) +{ + struct ecore_chain *p_chain = &p_hwfn->p_spq->chain; + u16 echo = ecore_chain_get_prod_idx(p_chain); + struct slow_path_element *elem; + struct core_db_data db; + + p_ent->elem.hdr.echo = OSAL_CPU_TO_LE16(echo); + elem = ecore_chain_produce(p_chain); + if (!elem) { + DP_NOTICE(p_hwfn, true, "Failed to produce from SPQ chain\n"); + return ECORE_INVAL; + } + + *elem = p_ent->elem; /* struct assignment */ + + /* send a doorbell on the slow hwfn session */ + OSAL_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 */ + OSAL_RMB(p_hwfn->p_dev); + + db.spq_prod = OSAL_CPU_TO_LE16(ecore_chain_get_prod_idx(p_chain)); + + /* do not reorder */ + OSAL_BARRIER(p_hwfn->p_dev); + + DOORBELL(p_hwfn, DB_ADDR(p_spq->cid, DQ_DEMS_LEGACY), *(u32 *)&db); + + /* make sure doorbell is rang */ + OSAL_MMIOWB(p_hwfn->p_dev); + + DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ, + "Doorbelled [0x%08x, CID 0x%08x] with Flags: %02x" + " agg_params: %02x, prod: %04x\n", + DB_ADDR(p_spq->cid, DQ_DEMS_LEGACY), p_spq->cid, db.params, + db.agg_flags, ecore_chain_get_prod_idx(p_chain)); + + return ECORE_SUCCESS; +} + +/*************************************************************************** + * Asynchronous events + ***************************************************************************/ + +static enum _ecore_status_t +ecore_async_event_completion(struct ecore_hwfn *p_hwfn, + struct event_ring_entry *p_eqe) +{ + switch (p_eqe->protocol_id) { + case PROTOCOLID_COMMON: + return ecore_sriov_eqe_event(p_hwfn, + p_eqe->opcode, + p_eqe->echo, &p_eqe->data); + default: + DP_NOTICE(p_hwfn, + true, "Unknown Async completion for protocol: %d\n", + p_eqe->protocol_id); + return ECORE_INVAL; + } +} + +/*************************************************************************** + * EQ API + ***************************************************************************/ +void ecore_eq_prod_update(struct ecore_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 */ + OSAL_MMIOWB(p_hwfn->p_dev); +} + +enum _ecore_status_t ecore_eq_completion(struct ecore_hwfn *p_hwfn, + void *cookie) +{ + struct ecore_eq *p_eq = cookie; + struct ecore_chain *p_chain = &p_eq->chain; + enum _ecore_status_t rc = 0; + + /* take a snapshot of the FW consumer */ + u16 fw_cons_idx = OSAL_LE16_TO_CPU(*p_eq->p_fw_cons); + + DP_VERBOSE(p_hwfn, ECORE_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 & ecore_chain_get_usable_per_page(p_chain)) == + ecore_chain_get_usable_per_page(p_chain)) { + fw_cons_idx += ecore_chain_get_unusable_per_page(p_chain); + } + + /* Complete current segment of eq entries */ + while (fw_cons_idx != ecore_chain_get_cons_idx(p_chain)) { + struct event_ring_entry *p_eqe = ecore_chain_consume(p_chain); + if (!p_eqe) { + rc = ECORE_INVAL; + break; + } + + DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ, + "op %x prot %x res0 %x echo %x " + "fwret %x flags %x\n", p_eqe->opcode, + p_eqe->protocol_id, /* Event Protocol ID */ + p_eqe->reserved0, /* Reserved */ + OSAL_LE16_TO_CPU(p_eqe->echo), + p_eqe->fw_return_code, /* FW return code for SP + * ramrods + */ + p_eqe->flags); + + if (GET_FIELD(p_eqe->flags, EVENT_RING_ENTRY_ASYNC)) { + if (ecore_async_event_completion(p_hwfn, p_eqe)) + rc = ECORE_INVAL; + } else if (ecore_spq_completion(p_hwfn, + p_eqe->echo, + p_eqe->fw_return_code, + &p_eqe->data)) { + rc = ECORE_INVAL; + } + + ecore_chain_recycle_consumed(p_chain); + } + + ecore_eq_prod_update(p_hwfn, ecore_chain_get_prod_idx(p_chain)); + + return rc; +} + +struct ecore_eq *ecore_eq_alloc(struct ecore_hwfn *p_hwfn, u16 num_elem) +{ + struct ecore_eq *p_eq; + + /* Allocate EQ struct */ + p_eq = OSAL_ZALLOC(p_hwfn->p_dev, GFP_KERNEL, sizeof(struct ecore_eq)); + if (!p_eq) { + DP_NOTICE(p_hwfn, true, + "Failed to allocate `struct ecore_eq'\n"); + return OSAL_NULL; + } + + /* Allocate and initialize EQ chain */ + if (ecore_chain_alloc(p_hwfn->p_dev, + ECORE_CHAIN_USE_TO_PRODUCE, + ECORE_CHAIN_MODE_PBL, + ECORE_CHAIN_CNT_TYPE_U16, + num_elem, + sizeof(union event_ring_element), &p_eq->chain)) { + DP_NOTICE(p_hwfn, true, "Failed to allocate eq chain"); + goto eq_allocate_fail; + } + + /* register EQ completion on the SP SB */ + ecore_int_register_cb(p_hwfn, + ecore_eq_completion, + p_eq, &p_eq->eq_sb_index, &p_eq->p_fw_cons); + + return p_eq; + +eq_allocate_fail: + ecore_eq_free(p_hwfn, p_eq); + return OSAL_NULL; +} + +void ecore_eq_setup(struct ecore_hwfn *p_hwfn, struct ecore_eq *p_eq) +{ + ecore_chain_reset(&p_eq->chain); +} + +void ecore_eq_free(struct ecore_hwfn *p_hwfn, struct ecore_eq *p_eq) +{ + if (!p_eq) + return; + ecore_chain_free(p_hwfn->p_dev, &p_eq->chain); + OSAL_FREE(p_hwfn->p_dev, p_eq); +} + +/*************************************************************************** +* CQE API - manipulate EQ functionality +***************************************************************************/ +static enum _ecore_status_t ecore_cqe_completion(struct ecore_hwfn *p_hwfn, + struct eth_slow_path_rx_cqe + *cqe, + enum protocol_type protocol) +{ + if (IS_VF(p_hwfn->p_dev)) + return OSAL_VF_CQE_COMPLETION(p_hwfn, cqe, 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 ecore_spq_completion(p_hwfn, cqe->echo, 0, OSAL_NULL); +} + +enum _ecore_status_t ecore_eth_cqe_completion(struct ecore_hwfn *p_hwfn, + struct eth_slow_path_rx_cqe *cqe) +{ + enum _ecore_status_t rc; + + rc = ecore_cqe_completion(p_hwfn, cqe, PROTOCOLID_ETH); + if (rc) { + DP_NOTICE(p_hwfn, true, + "Failed to handle RXQ CQE [cmd 0x%02x]\n", + cqe->ramrod_cmd_id); + } + + return rc; +} + +/*************************************************************************** + * Slow hwfn Queue (spq) + ***************************************************************************/ +void ecore_spq_setup(struct ecore_hwfn *p_hwfn) +{ + struct ecore_spq_entry *p_virt = OSAL_NULL; + struct ecore_spq *p_spq = p_hwfn->p_spq; + dma_addr_t p_phys = 0; + u32 i, capacity; + + OSAL_LIST_INIT(&p_spq->pending); + OSAL_LIST_INIT(&p_spq->completion_pending); + OSAL_LIST_INIT(&p_spq->free_pool); + OSAL_LIST_INIT(&p_spq->unlimited_pending); + OSAL_SPIN_LOCK_INIT(&p_spq->lock); + + /* SPQ empty pool */ + p_phys = p_spq->p_phys + OFFSETOF(struct ecore_spq_entry, ramrod); + p_virt = p_spq->p_virt; + + capacity = ecore_chain_get_capacity(&p_spq->chain); + for (i = 0; i < capacity; i++) { + p_virt->elem.data_ptr.hi = DMA_HI_LE(p_phys); + p_virt->elem.data_ptr.lo = DMA_LO_LE(p_phys); + + OSAL_LIST_PUSH_TAIL(&p_virt->list, &p_spq->free_pool); + + p_virt++; + p_phys += sizeof(struct ecore_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; + + OSAL_MEM_ZERO(p_spq->p_comp_bitmap, + SPQ_COMP_BMAP_SIZE * sizeof(unsigned long)); + p_spq->comp_bitmap_idx = 0; + + /* SPQ cid, cannot fail */ + ecore_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_spq->cid); + ecore_spq_hw_initialize(p_hwfn, p_spq); + + /* reset the chain itself */ + ecore_chain_reset(&p_spq->chain); +} + +enum _ecore_status_t ecore_spq_alloc(struct ecore_hwfn *p_hwfn) +{ + struct ecore_spq_entry *p_virt = OSAL_NULL; + struct ecore_spq *p_spq = OSAL_NULL; + dma_addr_t p_phys = 0; + u32 capacity; + + /* SPQ struct */ + p_spq = + OSAL_ZALLOC(p_hwfn->p_dev, GFP_KERNEL, sizeof(struct ecore_spq)); + if (!p_spq) { + DP_NOTICE(p_hwfn, true, + "Failed to allocate `struct ecore_spq'"); + return ECORE_NOMEM; + } + + /* SPQ ring */ + if (ecore_chain_alloc(p_hwfn->p_dev, ECORE_CHAIN_USE_TO_PRODUCE, + ECORE_CHAIN_MODE_SINGLE, ECORE_CHAIN_CNT_TYPE_U16, 0, + /* N/A when the mode is SINGLE */ + sizeof(struct slow_path_element), &p_spq->chain)) { + DP_NOTICE(p_hwfn, true, "Failed to allocate spq chain"); + goto spq_allocate_fail; + } + + /* allocate and fill the SPQ elements (incl. ramrod data list) */ + capacity = ecore_chain_get_capacity(&p_spq->chain); + p_virt = OSAL_DMA_ALLOC_COHERENT(p_hwfn->p_dev, &p_phys, + capacity * + sizeof(struct ecore_spq_entry)); + if (!p_virt) + goto spq_allocate_fail; + + p_spq->p_virt = p_virt; + p_spq->p_phys = p_phys; + + OSAL_SPIN_LOCK_ALLOC(p_hwfn, &p_spq->lock); + + p_hwfn->p_spq = p_spq; + return ECORE_SUCCESS; + +spq_allocate_fail: + ecore_chain_free(p_hwfn->p_dev, &p_spq->chain); + OSAL_FREE(p_hwfn->p_dev, p_spq); + return ECORE_NOMEM; +} + +void ecore_spq_free(struct ecore_hwfn *p_hwfn) +{ + struct ecore_spq *p_spq = p_hwfn->p_spq; + u32 capacity; + + if (!p_spq) + return; + + if (p_spq->p_virt) { + capacity = ecore_chain_get_capacity(&p_spq->chain); + OSAL_DMA_FREE_COHERENT(p_hwfn->p_dev, + p_spq->p_virt, + p_spq->p_phys, + capacity * + sizeof(struct ecore_spq_entry)); + } + + ecore_chain_free(p_hwfn->p_dev, &p_spq->chain); + OSAL_SPIN_LOCK_DEALLOC(&p_spq->lock); + OSAL_FREE(p_hwfn->p_dev, p_spq); +} + +enum _ecore_status_t +ecore_spq_get_entry(struct ecore_hwfn *p_hwfn, struct ecore_spq_entry **pp_ent) +{ + struct ecore_spq *p_spq = p_hwfn->p_spq; + struct ecore_spq_entry *p_ent = OSAL_NULL; + + OSAL_SPIN_LOCK(&p_spq->lock); + + if (OSAL_LIST_IS_EMPTY(&p_spq->free_pool)) { + p_ent = OSAL_ZALLOC(p_hwfn->p_dev, GFP_ATOMIC, + sizeof(struct ecore_spq_entry)); + if (!p_ent) { + OSAL_SPIN_UNLOCK(&p_spq->lock); + DP_NOTICE(p_hwfn, true, + "Failed to allocate an SPQ entry" + " for a pending ramrod\n"); + return ECORE_NOMEM; + } + p_ent->queue = &p_spq->unlimited_pending; + } else { + p_ent = OSAL_LIST_FIRST_ENTRY(&p_spq->free_pool, + struct ecore_spq_entry, list); + OSAL_LIST_REMOVE_ENTRY(&p_ent->list, &p_spq->free_pool); + p_ent->queue = &p_spq->pending; + } + + *pp_ent = p_ent; + + OSAL_SPIN_UNLOCK(&p_spq->lock); + + return ECORE_SUCCESS; +} + +/* Locked variant; Should be called while the SPQ lock is taken */ +static void __ecore_spq_return_entry(struct ecore_hwfn *p_hwfn, + struct ecore_spq_entry *p_ent) +{ + OSAL_LIST_PUSH_TAIL(&p_ent->list, &p_hwfn->p_spq->free_pool); +} + +void ecore_spq_return_entry(struct ecore_hwfn *p_hwfn, + struct ecore_spq_entry *p_ent) +{ + OSAL_SPIN_LOCK(&p_hwfn->p_spq->lock); + __ecore_spq_return_entry(p_hwfn, p_ent); + OSAL_SPIN_UNLOCK(&p_hwfn->p_spq->lock); +} + +/** + * @brief ecore_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 enum _ecore_status_t + */ +static enum _ecore_status_t +ecore_spq_add_entry(struct ecore_hwfn *p_hwfn, + struct ecore_spq_entry *p_ent, enum spq_priority priority) +{ + struct ecore_spq *p_spq = p_hwfn->p_spq; + + if (p_ent->queue == &p_spq->unlimited_pending) { + if (OSAL_LIST_IS_EMPTY(&p_spq->free_pool)) { + OSAL_LIST_PUSH_TAIL(&p_ent->list, + &p_spq->unlimited_pending); + p_spq->unlimited_pending_count++; + + return ECORE_SUCCESS; + } + + struct ecore_spq_entry *p_en2; + + p_en2 = OSAL_LIST_FIRST_ENTRY(&p_spq->free_pool, + struct ecore_spq_entry, + list); + OSAL_LIST_REMOVE_ENTRY(&p_en2->list, &p_spq->free_pool); + + /* 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; + + /* Setting the cookie to the comp_done of the + * new element. + */ + if (p_ent->comp_cb.cookie == &p_ent->comp_done) + p_ent->comp_cb.cookie = &p_en2->comp_done; + + *p_en2 = *p_ent; + + OSAL_FREE(p_hwfn->p_dev, p_ent); + + p_ent = p_en2; + } + + /* entry is to be placed in 'pending' queue */ + switch (priority) { + case ECORE_SPQ_PRIORITY_NORMAL: + OSAL_LIST_PUSH_TAIL(&p_ent->list, &p_spq->pending); + p_spq->normal_count++; + break; + case ECORE_SPQ_PRIORITY_HIGH: + OSAL_LIST_PUSH_HEAD(&p_ent->list, &p_spq->pending); + p_spq->high_count++; + break; + default: + return ECORE_INVAL; + } + + return ECORE_SUCCESS; +} + +/*************************************************************************** + * Accessor + ***************************************************************************/ + +u32 ecore_spq_get_cid(struct ecore_hwfn *p_hwfn) +{ + if (!p_hwfn->p_spq) + return 0xffffffff; /* illegal */ + return p_hwfn->p_spq->cid; +} + +/*************************************************************************** + * Posting new Ramrods + ***************************************************************************/ + +static enum _ecore_status_t ecore_spq_post_list(struct ecore_hwfn *p_hwfn, + osal_list_t *head, + u32 keep_reserve) +{ + struct ecore_spq *p_spq = p_hwfn->p_spq; + enum _ecore_status_t rc; + + /* TODO - implementation might be wasteful; will always keep room + * for an additional high priority ramrod (even if one is already + * pending FW) + */ + while (ecore_chain_get_elem_left(&p_spq->chain) > keep_reserve && + !OSAL_LIST_IS_EMPTY(head)) { + struct ecore_spq_entry *p_ent = + OSAL_LIST_FIRST_ENTRY(head, struct ecore_spq_entry, list); + OSAL_LIST_REMOVE_ENTRY(&p_ent->list, head); + OSAL_LIST_PUSH_TAIL(&p_ent->list, &p_spq->completion_pending); + p_spq->comp_sent_count++; + + rc = ecore_spq_hw_post(p_hwfn, p_spq, p_ent); + if (rc) { + OSAL_LIST_REMOVE_ENTRY(&p_ent->list, + &p_spq->completion_pending); + __ecore_spq_return_entry(p_hwfn, p_ent); + return rc; + } + } + + return ECORE_SUCCESS; +} + +static enum _ecore_status_t ecore_spq_pend_post(struct ecore_hwfn *p_hwfn) +{ + enum _ecore_status_t rc = ECORE_NOTIMPL; + struct ecore_spq *p_spq = p_hwfn->p_spq; + struct ecore_spq_entry *p_ent = OSAL_NULL; + + while (!OSAL_LIST_IS_EMPTY(&p_spq->free_pool)) { + if (OSAL_LIST_IS_EMPTY(&p_spq->unlimited_pending)) + break; + + p_ent = OSAL_LIST_FIRST_ENTRY(&p_spq->unlimited_pending, + struct ecore_spq_entry, list); + if (!p_ent) + return ECORE_INVAL; + + OSAL_LIST_REMOVE_ENTRY(&p_ent->list, &p_spq->unlimited_pending); + + ecore_spq_add_entry(p_hwfn, p_ent, p_ent->priority); + } + + rc = ecore_spq_post_list(p_hwfn, + &p_spq->pending, SPQ_HIGH_PRI_RESERVE_DEFAULT); + if (rc) + return rc; + + return ECORE_SUCCESS; +} + +enum _ecore_status_t ecore_spq_post(struct ecore_hwfn *p_hwfn, + struct ecore_spq_entry *p_ent, + u8 *fw_return_code) +{ + enum _ecore_status_t rc = ECORE_SUCCESS; + struct ecore_spq *p_spq = p_hwfn ? p_hwfn->p_spq : OSAL_NULL; + bool b_ret_ent = true; + + if (!p_hwfn) + return ECORE_INVAL; + + if (!p_ent) { + DP_NOTICE(p_hwfn, true, "Got a NULL pointer\n"); + return ECORE_INVAL; + } + + if (p_hwfn->p_dev->recov_in_prog) { + DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ, + "Recovery is in progress -> skip spq post" + " [cmd %02x protocol %02x]", + p_ent->elem.hdr.cmd_id, p_ent->elem.hdr.protocol_id); + /* Return success to let the flows to be completed successfully + * w/o any error handling. + */ + return ECORE_SUCCESS; + } + + OSAL_SPIN_LOCK(&p_spq->lock); + + /* Complete the entry */ + rc = ecore_spq_fill_entry(p_hwfn, p_ent); + + /* 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 = ecore_spq_add_entry(p_hwfn, p_ent, p_ent->priority); + if (rc) + goto spq_post_fail; + + rc = ecore_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; + } + + OSAL_SPIN_UNLOCK(&p_spq->lock); + + if (p_ent->comp_mode == ECORE_SPQ_MODE_EBLOCK) { + /* For entries in ECORE 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 = ecore_spq_block(p_hwfn, p_ent, fw_return_code); + if (rc) + goto spq_post_fail2; + + /* return to pool */ + ecore_spq_return_entry(p_hwfn, p_ent); + } + return rc; + +spq_post_fail2: + OSAL_SPIN_LOCK(&p_spq->lock); + OSAL_LIST_REMOVE_ENTRY(&p_ent->list, &p_spq->completion_pending); + ecore_chain_return_produced(&p_spq->chain); + +spq_post_fail: + /* return to the free pool */ + if (b_ret_ent) + __ecore_spq_return_entry(p_hwfn, p_ent); + OSAL_SPIN_UNLOCK(&p_spq->lock); + + return rc; +} + +enum _ecore_status_t ecore_spq_completion(struct ecore_hwfn *p_hwfn, + __le16 echo, + u8 fw_return_code, + union event_ring_data *p_data) +{ + struct ecore_spq *p_spq; + struct ecore_spq_entry *p_ent = OSAL_NULL; + struct ecore_spq_entry *tmp; + struct ecore_spq_entry *found = OSAL_NULL; + enum _ecore_status_t rc; + + if (!p_hwfn) + return ECORE_INVAL; + + p_spq = p_hwfn->p_spq; + if (!p_spq) + return ECORE_INVAL; + + OSAL_SPIN_LOCK(&p_spq->lock); + OSAL_LIST_FOR_EACH_ENTRY_SAFE(p_ent, + tmp, + &p_spq->completion_pending, + list, struct ecore_spq_entry) { + if (p_ent->elem.hdr.echo == echo) { + OSAL_LIST_REMOVE_ENTRY(&p_ent->list, + &p_spq->completion_pending); + + /* 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. + */ + SPQ_COMP_BMAP_SET_BIT(p_spq, echo); + while (SPQ_COMP_BMAP_TEST_BIT(p_spq, + p_spq->comp_bitmap_idx)) { + SPQ_COMP_BMAP_CLEAR_BIT(p_spq, + p_spq->comp_bitmap_idx); + p_spq->comp_bitmap_idx++; + ecore_chain_return_produced(&p_spq->chain); + } + + p_spq->comp_count++; + found = p_ent; + break; + } + + /* This is debug and should be relatively uncommon - depends + * on scenarios which have mutliple per-PF sent ramrods. + */ + DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ, + "Got completion for echo %04x - doesn't match" + " echo %04x in completion pending list\n", + OSAL_LE16_TO_CPU(echo), + OSAL_LE16_TO_CPU(p_ent->elem.hdr.echo)); + } + + /* Release lock before callback, as callback may post + * an additional ramrod. + */ + OSAL_SPIN_UNLOCK(&p_spq->lock); + + if (!found) { + DP_NOTICE(p_hwfn, true, + "Failed to find an entry this" + " EQE [echo %04x] completes\n", + OSAL_LE16_TO_CPU(echo)); + return ECORE_EXISTS; + } + + DP_VERBOSE(p_hwfn, ECORE_MSG_SPQ, + "Complete EQE [echo %04x]: func %p cookie %p)\n", + OSAL_LE16_TO_CPU(echo), + 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 != ECORE_SPQ_MODE_EBLOCK) { + /* EBLOCK is responsible for freeing its own entry */ + ecore_spq_return_entry(p_hwfn, found); + } + + /* Attempt to post pending requests */ + OSAL_SPIN_LOCK(&p_spq->lock); + rc = ecore_spq_pend_post(p_hwfn); + OSAL_SPIN_UNLOCK(&p_spq->lock); + + return rc; +} + +struct ecore_consq *ecore_consq_alloc(struct ecore_hwfn *p_hwfn) +{ + struct ecore_consq *p_consq; + + /* Allocate ConsQ struct */ + p_consq = + OSAL_ZALLOC(p_hwfn->p_dev, GFP_KERNEL, sizeof(struct ecore_consq)); + if (!p_consq) { + DP_NOTICE(p_hwfn, true, + "Failed to allocate `struct ecore_consq'\n"); + return OSAL_NULL; + } + + /* Allocate and initialize EQ chain */ + if (ecore_chain_alloc(p_hwfn->p_dev, + ECORE_CHAIN_USE_TO_PRODUCE, + ECORE_CHAIN_MODE_PBL, + ECORE_CHAIN_CNT_TYPE_U16, + ECORE_CHAIN_PAGE_SIZE / 0x80, + 0x80, &p_consq->chain)) { + DP_NOTICE(p_hwfn, true, "Failed to allocate consq chain"); + goto consq_allocate_fail; + } + + return p_consq; + +consq_allocate_fail: + ecore_consq_free(p_hwfn, p_consq); + return OSAL_NULL; +} + +void ecore_consq_setup(struct ecore_hwfn *p_hwfn, struct ecore_consq *p_consq) +{ + ecore_chain_reset(&p_consq->chain); +} + +void ecore_consq_free(struct ecore_hwfn *p_hwfn, struct ecore_consq *p_consq) +{ + if (!p_consq) + return; + ecore_chain_free(p_hwfn->p_dev, &p_consq->chain); + OSAL_FREE(p_hwfn->p_dev, p_consq); +} |