1fe56b9e6SYuval Mintz /* QLogic qed NIC Driver 2fe56b9e6SYuval Mintz * Copyright (c) 2015 QLogic Corporation 3fe56b9e6SYuval Mintz * 4fe56b9e6SYuval Mintz * This software is available under the terms of the GNU General Public License 5fe56b9e6SYuval Mintz * (GPL) Version 2, available from the file COPYING in the main directory of 6fe56b9e6SYuval Mintz * this source tree. 7fe56b9e6SYuval Mintz */ 8fe56b9e6SYuval Mintz 9fe56b9e6SYuval Mintz #include <linux/types.h> 10fe56b9e6SYuval Mintz #include <asm/byteorder.h> 11fe56b9e6SYuval Mintz #include <linux/io.h> 12fe56b9e6SYuval Mintz #include <linux/delay.h> 13fe56b9e6SYuval Mintz #include <linux/dma-mapping.h> 14fe56b9e6SYuval Mintz #include <linux/errno.h> 15fe56b9e6SYuval Mintz #include <linux/kernel.h> 16fe56b9e6SYuval Mintz #include <linux/list.h> 17fe56b9e6SYuval Mintz #include <linux/pci.h> 18fe56b9e6SYuval Mintz #include <linux/slab.h> 19fe56b9e6SYuval Mintz #include <linux/spinlock.h> 20fe56b9e6SYuval Mintz #include <linux/string.h> 21fe56b9e6SYuval Mintz #include "qed.h" 22fe56b9e6SYuval Mintz #include "qed_cxt.h" 23fe56b9e6SYuval Mintz #include "qed_dev_api.h" 24fe56b9e6SYuval Mintz #include "qed_hsi.h" 25fe56b9e6SYuval Mintz #include "qed_hw.h" 26fe56b9e6SYuval Mintz #include "qed_int.h" 27fe56b9e6SYuval Mintz #include "qed_mcp.h" 28fe56b9e6SYuval Mintz #include "qed_reg_addr.h" 29fe56b9e6SYuval Mintz #include "qed_sp.h" 3037bff2b9SYuval Mintz #include "qed_sriov.h" 3151ff1725SRam Amrani #if IS_ENABLED(CONFIG_INFINIBAND_QEDR) 3251ff1725SRam Amrani #include "qed_roce.h" 3351ff1725SRam Amrani #endif 34fe56b9e6SYuval Mintz 35fe56b9e6SYuval Mintz /*************************************************************************** 36fe56b9e6SYuval Mintz * Structures & Definitions 37fe56b9e6SYuval Mintz ***************************************************************************/ 38fe56b9e6SYuval Mintz 39fe56b9e6SYuval Mintz #define SPQ_HIGH_PRI_RESERVE_DEFAULT (1) 40c59f5291SYuval Mintz 41c59f5291SYuval Mintz #define SPQ_BLOCK_DELAY_MAX_ITER (10) 42c59f5291SYuval Mintz #define SPQ_BLOCK_DELAY_US (10) 43c59f5291SYuval Mintz #define SPQ_BLOCK_SLEEP_MAX_ITER (1000) 44c59f5291SYuval Mintz #define SPQ_BLOCK_SLEEP_MS (5) 45fe56b9e6SYuval Mintz 46fe56b9e6SYuval Mintz /*************************************************************************** 47fe56b9e6SYuval Mintz * Blocking Imp. (BLOCK/EBLOCK mode) 48fe56b9e6SYuval Mintz ***************************************************************************/ 49fe56b9e6SYuval Mintz static void qed_spq_blocking_cb(struct qed_hwfn *p_hwfn, 50fe56b9e6SYuval Mintz void *cookie, 511a635e48SYuval Mintz union event_ring_data *data, u8 fw_return_code) 52fe56b9e6SYuval Mintz { 53fe56b9e6SYuval Mintz struct qed_spq_comp_done *comp_done; 54fe56b9e6SYuval Mintz 55fe56b9e6SYuval Mintz comp_done = (struct qed_spq_comp_done *)cookie; 56fe56b9e6SYuval Mintz 57fe56b9e6SYuval Mintz comp_done->fw_return_code = fw_return_code; 58fe56b9e6SYuval Mintz 59d5df7688SManish Chopra /* Make sure completion done is visible on waiting thread */ 60d5df7688SManish Chopra smp_store_release(&comp_done->done, 0x1); 61fe56b9e6SYuval Mintz } 62fe56b9e6SYuval Mintz 63c59f5291SYuval Mintz static int __qed_spq_block(struct qed_hwfn *p_hwfn, 64c59f5291SYuval Mintz struct qed_spq_entry *p_ent, 65c59f5291SYuval Mintz u8 *p_fw_ret, bool sleep_between_iter) 66c59f5291SYuval Mintz { 67c59f5291SYuval Mintz struct qed_spq_comp_done *comp_done; 68c59f5291SYuval Mintz u32 iter_cnt; 69c59f5291SYuval Mintz 70c59f5291SYuval Mintz comp_done = (struct qed_spq_comp_done *)p_ent->comp_cb.cookie; 71c59f5291SYuval Mintz iter_cnt = sleep_between_iter ? SPQ_BLOCK_SLEEP_MAX_ITER 72c59f5291SYuval Mintz : SPQ_BLOCK_DELAY_MAX_ITER; 73c59f5291SYuval Mintz 74c59f5291SYuval Mintz while (iter_cnt--) { 75c59f5291SYuval Mintz /* Validate we receive completion update */ 76d5df7688SManish Chopra if (READ_ONCE(comp_done->done) == 1) { 77d5df7688SManish Chopra /* Read updated FW return value */ 78d5df7688SManish Chopra smp_read_barrier_depends(); 79c59f5291SYuval Mintz if (p_fw_ret) 80c59f5291SYuval Mintz *p_fw_ret = comp_done->fw_return_code; 81c59f5291SYuval Mintz return 0; 82c59f5291SYuval Mintz } 83c59f5291SYuval Mintz 84c59f5291SYuval Mintz if (sleep_between_iter) 85c59f5291SYuval Mintz msleep(SPQ_BLOCK_SLEEP_MS); 86c59f5291SYuval Mintz else 87c59f5291SYuval Mintz udelay(SPQ_BLOCK_DELAY_US); 88c59f5291SYuval Mintz } 89c59f5291SYuval Mintz 90c59f5291SYuval Mintz return -EBUSY; 91c59f5291SYuval Mintz } 92c59f5291SYuval Mintz 93fe56b9e6SYuval Mintz static int qed_spq_block(struct qed_hwfn *p_hwfn, 94fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent, 95c59f5291SYuval Mintz u8 *p_fw_ret, bool skip_quick_poll) 96fe56b9e6SYuval Mintz { 97fe56b9e6SYuval Mintz struct qed_spq_comp_done *comp_done; 98fe56b9e6SYuval Mintz int rc; 99fe56b9e6SYuval Mintz 100c59f5291SYuval Mintz /* A relatively short polling period w/o sleeping, to allow the FW to 101c59f5291SYuval Mintz * complete the ramrod and thus possibly to avoid the following sleeps. 102c59f5291SYuval Mintz */ 103c59f5291SYuval Mintz if (!skip_quick_poll) { 104c59f5291SYuval Mintz rc = __qed_spq_block(p_hwfn, p_ent, p_fw_ret, false); 105c59f5291SYuval Mintz if (!rc) 106fe56b9e6SYuval Mintz return 0; 107fe56b9e6SYuval Mintz } 108c59f5291SYuval Mintz 109c59f5291SYuval Mintz /* Move to polling with a sleeping period between iterations */ 110c59f5291SYuval Mintz rc = __qed_spq_block(p_hwfn, p_ent, p_fw_ret, true); 111c59f5291SYuval Mintz if (!rc) 112c59f5291SYuval Mintz return 0; 113fe56b9e6SYuval Mintz 114fe56b9e6SYuval Mintz DP_INFO(p_hwfn, "Ramrod is stuck, requesting MCP drain\n"); 115fe56b9e6SYuval Mintz rc = qed_mcp_drain(p_hwfn, p_hwfn->p_main_ptt); 116c59f5291SYuval Mintz if (rc) { 117fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "MCP drain failed\n"); 118c59f5291SYuval Mintz goto err; 119c59f5291SYuval Mintz } 120fe56b9e6SYuval Mintz 121fe56b9e6SYuval Mintz /* Retry after drain */ 122c59f5291SYuval Mintz rc = __qed_spq_block(p_hwfn, p_ent, p_fw_ret, true); 123c59f5291SYuval Mintz if (!rc) 124c59f5291SYuval Mintz return 0; 125c59f5291SYuval Mintz 126c59f5291SYuval Mintz comp_done = (struct qed_spq_comp_done *)p_ent->comp_cb.cookie; 127fe56b9e6SYuval Mintz if (comp_done->done == 1) { 128fe56b9e6SYuval Mintz if (p_fw_ret) 129fe56b9e6SYuval Mintz *p_fw_ret = comp_done->fw_return_code; 130fe56b9e6SYuval Mintz return 0; 131fe56b9e6SYuval Mintz } 132c59f5291SYuval Mintz err: 133c59f5291SYuval Mintz DP_NOTICE(p_hwfn, 134c59f5291SYuval Mintz "Ramrod is stuck [CID %08x cmd %02x protocol %02x echo %04x]\n", 135c59f5291SYuval Mintz le32_to_cpu(p_ent->elem.hdr.cid), 136c59f5291SYuval Mintz p_ent->elem.hdr.cmd_id, 137c59f5291SYuval Mintz p_ent->elem.hdr.protocol_id, 138c59f5291SYuval Mintz le16_to_cpu(p_ent->elem.hdr.echo)); 139fe56b9e6SYuval Mintz 140fe56b9e6SYuval Mintz return -EBUSY; 141fe56b9e6SYuval Mintz } 142fe56b9e6SYuval Mintz 143fe56b9e6SYuval Mintz /*************************************************************************** 144fe56b9e6SYuval Mintz * SPQ entries inner API 145fe56b9e6SYuval Mintz ***************************************************************************/ 1461a635e48SYuval Mintz static int qed_spq_fill_entry(struct qed_hwfn *p_hwfn, 147fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent) 148fe56b9e6SYuval Mintz { 149fe56b9e6SYuval Mintz p_ent->flags = 0; 150fe56b9e6SYuval Mintz 151fe56b9e6SYuval Mintz switch (p_ent->comp_mode) { 152fe56b9e6SYuval Mintz case QED_SPQ_MODE_EBLOCK: 153fe56b9e6SYuval Mintz case QED_SPQ_MODE_BLOCK: 154fe56b9e6SYuval Mintz p_ent->comp_cb.function = qed_spq_blocking_cb; 155fe56b9e6SYuval Mintz break; 156fe56b9e6SYuval Mintz case QED_SPQ_MODE_CB: 157fe56b9e6SYuval Mintz break; 158fe56b9e6SYuval Mintz default: 159fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Unknown SPQE completion mode %d\n", 160fe56b9e6SYuval Mintz p_ent->comp_mode); 161fe56b9e6SYuval Mintz return -EINVAL; 162fe56b9e6SYuval Mintz } 163fe56b9e6SYuval Mintz 164fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 165fe56b9e6SYuval Mintz "Ramrod header: [CID 0x%08x CMD 0x%02x protocol 0x%02x] Data pointer: [%08x:%08x] Completion Mode: %s\n", 166fe56b9e6SYuval Mintz p_ent->elem.hdr.cid, 167fe56b9e6SYuval Mintz p_ent->elem.hdr.cmd_id, 168fe56b9e6SYuval Mintz p_ent->elem.hdr.protocol_id, 169fe56b9e6SYuval Mintz p_ent->elem.data_ptr.hi, 170fe56b9e6SYuval Mintz p_ent->elem.data_ptr.lo, 171fe56b9e6SYuval Mintz D_TRINE(p_ent->comp_mode, QED_SPQ_MODE_EBLOCK, 172fe56b9e6SYuval Mintz QED_SPQ_MODE_BLOCK, "MODE_EBLOCK", "MODE_BLOCK", 173fe56b9e6SYuval Mintz "MODE_CB")); 174fe56b9e6SYuval Mintz 175fe56b9e6SYuval Mintz return 0; 176fe56b9e6SYuval Mintz } 177fe56b9e6SYuval Mintz 178fe56b9e6SYuval Mintz /*************************************************************************** 179fe56b9e6SYuval Mintz * HSI access 180fe56b9e6SYuval Mintz ***************************************************************************/ 181fe56b9e6SYuval Mintz static void qed_spq_hw_initialize(struct qed_hwfn *p_hwfn, 182fe56b9e6SYuval Mintz struct qed_spq *p_spq) 183fe56b9e6SYuval Mintz { 184fe56b9e6SYuval Mintz u16 pq; 185fe56b9e6SYuval Mintz struct qed_cxt_info cxt_info; 186fe56b9e6SYuval Mintz struct core_conn_context *p_cxt; 187fe56b9e6SYuval Mintz union qed_qm_pq_params pq_params; 188fe56b9e6SYuval Mintz int rc; 189fe56b9e6SYuval Mintz 190fe56b9e6SYuval Mintz cxt_info.iid = p_spq->cid; 191fe56b9e6SYuval Mintz 192fe56b9e6SYuval Mintz rc = qed_cxt_get_cid_info(p_hwfn, &cxt_info); 193fe56b9e6SYuval Mintz 194fe56b9e6SYuval Mintz if (rc < 0) { 195fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Cannot find context info for cid=%d\n", 196fe56b9e6SYuval Mintz p_spq->cid); 197fe56b9e6SYuval Mintz return; 198fe56b9e6SYuval Mintz } 199fe56b9e6SYuval Mintz 200fe56b9e6SYuval Mintz p_cxt = cxt_info.p_cxt; 201fe56b9e6SYuval Mintz 202fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags10, 203fe56b9e6SYuval Mintz XSTORM_CORE_CONN_AG_CTX_DQ_CF_EN, 1); 204fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags1, 205fe56b9e6SYuval Mintz XSTORM_CORE_CONN_AG_CTX_DQ_CF_ACTIVE, 1); 206fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags9, 207fe56b9e6SYuval Mintz XSTORM_CORE_CONN_AG_CTX_CONSOLID_PROD_CF_EN, 1); 208fe56b9e6SYuval Mintz 209fe56b9e6SYuval Mintz /* QM physical queue */ 210fe56b9e6SYuval Mintz memset(&pq_params, 0, sizeof(pq_params)); 211fe56b9e6SYuval Mintz pq_params.core.tc = LB_TC; 212fe56b9e6SYuval Mintz pq = qed_get_qm_pq(p_hwfn, PROTOCOLID_CORE, &pq_params); 213fe56b9e6SYuval Mintz p_cxt->xstorm_ag_context.physical_q0 = cpu_to_le16(pq); 214fe56b9e6SYuval Mintz 215fe56b9e6SYuval Mintz p_cxt->xstorm_st_context.spq_base_lo = 216fe56b9e6SYuval Mintz DMA_LO_LE(p_spq->chain.p_phys_addr); 217fe56b9e6SYuval Mintz p_cxt->xstorm_st_context.spq_base_hi = 218fe56b9e6SYuval Mintz DMA_HI_LE(p_spq->chain.p_phys_addr); 219fe56b9e6SYuval Mintz 22094494598SYuval Mintz DMA_REGPAIR_LE(p_cxt->xstorm_st_context.consolid_base_addr, 22194494598SYuval Mintz p_hwfn->p_consq->chain.p_phys_addr); 222fe56b9e6SYuval Mintz } 223fe56b9e6SYuval Mintz 224fe56b9e6SYuval Mintz static int qed_spq_hw_post(struct qed_hwfn *p_hwfn, 2251a635e48SYuval Mintz struct qed_spq *p_spq, struct qed_spq_entry *p_ent) 226fe56b9e6SYuval Mintz { 227fe56b9e6SYuval Mintz struct qed_chain *p_chain = &p_hwfn->p_spq->chain; 22876a9a364STomer Tayar u16 echo = qed_chain_get_prod_idx(p_chain); 229fe56b9e6SYuval Mintz struct slow_path_element *elem; 230fe56b9e6SYuval Mintz struct core_db_data db; 231fe56b9e6SYuval Mintz 23276a9a364STomer Tayar p_ent->elem.hdr.echo = cpu_to_le16(echo); 233fe56b9e6SYuval Mintz elem = qed_chain_produce(p_chain); 234fe56b9e6SYuval Mintz if (!elem) { 235fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Failed to produce from SPQ chain\n"); 236fe56b9e6SYuval Mintz return -EINVAL; 237fe56b9e6SYuval Mintz } 238fe56b9e6SYuval Mintz 239fe56b9e6SYuval Mintz *elem = p_ent->elem; /* struct assignment */ 240fe56b9e6SYuval Mintz 241fe56b9e6SYuval Mintz /* send a doorbell on the slow hwfn session */ 242fe56b9e6SYuval Mintz memset(&db, 0, sizeof(db)); 243fe56b9e6SYuval Mintz SET_FIELD(db.params, CORE_DB_DATA_DEST, DB_DEST_XCM); 244fe56b9e6SYuval Mintz SET_FIELD(db.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET); 245fe56b9e6SYuval Mintz SET_FIELD(db.params, CORE_DB_DATA_AGG_VAL_SEL, 246fe56b9e6SYuval Mintz DQ_XCM_CORE_SPQ_PROD_CMD); 247fe56b9e6SYuval Mintz db.agg_flags = DQ_XCM_CORE_DQ_CF_CMD; 248fe56b9e6SYuval Mintz db.spq_prod = cpu_to_le16(qed_chain_get_prod_idx(p_chain)); 249fe56b9e6SYuval Mintz 25034c7bb47SSudarsana Reddy Kalluru /* make sure the SPQE is updated before the doorbell */ 25134c7bb47SSudarsana Reddy Kalluru wmb(); 252fe56b9e6SYuval Mintz 253fe56b9e6SYuval Mintz DOORBELL(p_hwfn, qed_db_addr(p_spq->cid, DQ_DEMS_LEGACY), *(u32 *)&db); 254fe56b9e6SYuval Mintz 255fe56b9e6SYuval Mintz /* make sure doorbell is rang */ 25634c7bb47SSudarsana Reddy Kalluru wmb(); 257fe56b9e6SYuval Mintz 258fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 259fe56b9e6SYuval Mintz "Doorbelled [0x%08x, CID 0x%08x] with Flags: %02x agg_params: %02x, prod: %04x\n", 260fe56b9e6SYuval Mintz qed_db_addr(p_spq->cid, DQ_DEMS_LEGACY), 261fe56b9e6SYuval Mintz p_spq->cid, db.params, db.agg_flags, 262fe56b9e6SYuval Mintz qed_chain_get_prod_idx(p_chain)); 263fe56b9e6SYuval Mintz 264fe56b9e6SYuval Mintz return 0; 265fe56b9e6SYuval Mintz } 266fe56b9e6SYuval Mintz 267fe56b9e6SYuval Mintz /*************************************************************************** 268fe56b9e6SYuval Mintz * Asynchronous events 269fe56b9e6SYuval Mintz ***************************************************************************/ 270fe56b9e6SYuval Mintz static int 271fe56b9e6SYuval Mintz qed_async_event_completion(struct qed_hwfn *p_hwfn, 272fe56b9e6SYuval Mintz struct event_ring_entry *p_eqe) 273fe56b9e6SYuval Mintz { 27437bff2b9SYuval Mintz switch (p_eqe->protocol_id) { 27551ff1725SRam Amrani #if IS_ENABLED(CONFIG_INFINIBAND_QEDR) 27651ff1725SRam Amrani case PROTOCOLID_ROCE: 27751ff1725SRam Amrani qed_async_roce_event(p_hwfn, p_eqe); 27851ff1725SRam Amrani return 0; 27951ff1725SRam Amrani #endif 28037bff2b9SYuval Mintz case PROTOCOLID_COMMON: 28137bff2b9SYuval Mintz return qed_sriov_eqe_event(p_hwfn, 28237bff2b9SYuval Mintz p_eqe->opcode, 28337bff2b9SYuval Mintz p_eqe->echo, &p_eqe->data); 28437bff2b9SYuval Mintz default: 285fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, 286fe56b9e6SYuval Mintz "Unknown Async completion for protocol: %d\n", 287fe56b9e6SYuval Mintz p_eqe->protocol_id); 288fe56b9e6SYuval Mintz return -EINVAL; 289fe56b9e6SYuval Mintz } 29037bff2b9SYuval Mintz } 291fe56b9e6SYuval Mintz 292fe56b9e6SYuval Mintz /*************************************************************************** 293fe56b9e6SYuval Mintz * EQ API 294fe56b9e6SYuval Mintz ***************************************************************************/ 2951a635e48SYuval Mintz void qed_eq_prod_update(struct qed_hwfn *p_hwfn, u16 prod) 296fe56b9e6SYuval Mintz { 297fe56b9e6SYuval Mintz u32 addr = GTT_BAR0_MAP_REG_USDM_RAM + 298fe56b9e6SYuval Mintz USTORM_EQE_CONS_OFFSET(p_hwfn->rel_pf_id); 299fe56b9e6SYuval Mintz 300fe56b9e6SYuval Mintz REG_WR16(p_hwfn, addr, prod); 301fe56b9e6SYuval Mintz 302fe56b9e6SYuval Mintz /* keep prod updates ordered */ 303fe56b9e6SYuval Mintz mmiowb(); 304fe56b9e6SYuval Mintz } 305fe56b9e6SYuval Mintz 3061a635e48SYuval Mintz int qed_eq_completion(struct qed_hwfn *p_hwfn, void *cookie) 307fe56b9e6SYuval Mintz { 308fe56b9e6SYuval Mintz struct qed_eq *p_eq = cookie; 309fe56b9e6SYuval Mintz struct qed_chain *p_chain = &p_eq->chain; 310fe56b9e6SYuval Mintz int rc = 0; 311fe56b9e6SYuval Mintz 312fe56b9e6SYuval Mintz /* take a snapshot of the FW consumer */ 313fe56b9e6SYuval Mintz u16 fw_cons_idx = le16_to_cpu(*p_eq->p_fw_cons); 314fe56b9e6SYuval Mintz 315fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, "fw_cons_idx %x\n", fw_cons_idx); 316fe56b9e6SYuval Mintz 317fe56b9e6SYuval Mintz /* Need to guarantee the fw_cons index we use points to a usuable 318fe56b9e6SYuval Mintz * element (to comply with our chain), so our macros would comply 319fe56b9e6SYuval Mintz */ 320fe56b9e6SYuval Mintz if ((fw_cons_idx & qed_chain_get_usable_per_page(p_chain)) == 321fe56b9e6SYuval Mintz qed_chain_get_usable_per_page(p_chain)) 322fe56b9e6SYuval Mintz fw_cons_idx += qed_chain_get_unusable_per_page(p_chain); 323fe56b9e6SYuval Mintz 324fe56b9e6SYuval Mintz /* Complete current segment of eq entries */ 325fe56b9e6SYuval Mintz while (fw_cons_idx != qed_chain_get_cons_idx(p_chain)) { 326fe56b9e6SYuval Mintz struct event_ring_entry *p_eqe = qed_chain_consume(p_chain); 327fe56b9e6SYuval Mintz 328fe56b9e6SYuval Mintz if (!p_eqe) { 329fe56b9e6SYuval Mintz rc = -EINVAL; 330fe56b9e6SYuval Mintz break; 331fe56b9e6SYuval Mintz } 332fe56b9e6SYuval Mintz 333fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 334fe56b9e6SYuval Mintz "op %x prot %x res0 %x echo %x fwret %x flags %x\n", 335fe56b9e6SYuval Mintz p_eqe->opcode, 336fe56b9e6SYuval Mintz p_eqe->protocol_id, 337fe56b9e6SYuval Mintz p_eqe->reserved0, 338fe56b9e6SYuval Mintz le16_to_cpu(p_eqe->echo), 339fe56b9e6SYuval Mintz p_eqe->fw_return_code, 340fe56b9e6SYuval Mintz p_eqe->flags); 341fe56b9e6SYuval Mintz 342fe56b9e6SYuval Mintz if (GET_FIELD(p_eqe->flags, EVENT_RING_ENTRY_ASYNC)) { 343fe56b9e6SYuval Mintz if (qed_async_event_completion(p_hwfn, p_eqe)) 344fe56b9e6SYuval Mintz rc = -EINVAL; 345fe56b9e6SYuval Mintz } else if (qed_spq_completion(p_hwfn, 346fe56b9e6SYuval Mintz p_eqe->echo, 347fe56b9e6SYuval Mintz p_eqe->fw_return_code, 348fe56b9e6SYuval Mintz &p_eqe->data)) { 349fe56b9e6SYuval Mintz rc = -EINVAL; 350fe56b9e6SYuval Mintz } 351fe56b9e6SYuval Mintz 352fe56b9e6SYuval Mintz qed_chain_recycle_consumed(p_chain); 353fe56b9e6SYuval Mintz } 354fe56b9e6SYuval Mintz 355fe56b9e6SYuval Mintz qed_eq_prod_update(p_hwfn, qed_chain_get_prod_idx(p_chain)); 356fe56b9e6SYuval Mintz 357fe56b9e6SYuval Mintz return rc; 358fe56b9e6SYuval Mintz } 359fe56b9e6SYuval Mintz 3601a635e48SYuval Mintz struct qed_eq *qed_eq_alloc(struct qed_hwfn *p_hwfn, u16 num_elem) 361fe56b9e6SYuval Mintz { 362fe56b9e6SYuval Mintz struct qed_eq *p_eq; 363fe56b9e6SYuval Mintz 364fe56b9e6SYuval Mintz /* Allocate EQ struct */ 36560fffb3bSYuval Mintz p_eq = kzalloc(sizeof(*p_eq), GFP_KERNEL); 3662591c280SJoe Perches if (!p_eq) 367fe56b9e6SYuval Mintz return NULL; 368fe56b9e6SYuval Mintz 369fe56b9e6SYuval Mintz /* Allocate and initialize EQ chain*/ 370fe56b9e6SYuval Mintz if (qed_chain_alloc(p_hwfn->cdev, 371fe56b9e6SYuval Mintz QED_CHAIN_USE_TO_PRODUCE, 372fe56b9e6SYuval Mintz QED_CHAIN_MODE_PBL, 373a91eb52aSYuval Mintz QED_CHAIN_CNT_TYPE_U16, 374fe56b9e6SYuval Mintz num_elem, 375fe56b9e6SYuval Mintz sizeof(union event_ring_element), 3762591c280SJoe Perches &p_eq->chain)) 377fe56b9e6SYuval Mintz goto eq_allocate_fail; 378fe56b9e6SYuval Mintz 379fe56b9e6SYuval Mintz /* register EQ completion on the SP SB */ 3801a635e48SYuval Mintz qed_int_register_cb(p_hwfn, qed_eq_completion, 3811a635e48SYuval Mintz p_eq, &p_eq->eq_sb_index, &p_eq->p_fw_cons); 382fe56b9e6SYuval Mintz 383fe56b9e6SYuval Mintz return p_eq; 384fe56b9e6SYuval Mintz 385fe56b9e6SYuval Mintz eq_allocate_fail: 386fe56b9e6SYuval Mintz qed_eq_free(p_hwfn, p_eq); 387fe56b9e6SYuval Mintz return NULL; 388fe56b9e6SYuval Mintz } 389fe56b9e6SYuval Mintz 3901a635e48SYuval Mintz void qed_eq_setup(struct qed_hwfn *p_hwfn, struct qed_eq *p_eq) 391fe56b9e6SYuval Mintz { 392fe56b9e6SYuval Mintz qed_chain_reset(&p_eq->chain); 393fe56b9e6SYuval Mintz } 394fe56b9e6SYuval Mintz 3951a635e48SYuval Mintz void qed_eq_free(struct qed_hwfn *p_hwfn, struct qed_eq *p_eq) 396fe56b9e6SYuval Mintz { 397fe56b9e6SYuval Mintz if (!p_eq) 398fe56b9e6SYuval Mintz return; 399fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_eq->chain); 400fe56b9e6SYuval Mintz kfree(p_eq); 401fe56b9e6SYuval Mintz } 402fe56b9e6SYuval Mintz 403fe56b9e6SYuval Mintz /*************************************************************************** 404cee4d264SManish Chopra * CQE API - manipulate EQ functionality 405cee4d264SManish Chopra ***************************************************************************/ 4061a635e48SYuval Mintz static int qed_cqe_completion(struct qed_hwfn *p_hwfn, 407cee4d264SManish Chopra struct eth_slow_path_rx_cqe *cqe, 408cee4d264SManish Chopra enum protocol_type protocol) 409cee4d264SManish Chopra { 4101408cc1fSYuval Mintz if (IS_VF(p_hwfn->cdev)) 4111408cc1fSYuval Mintz return 0; 4121408cc1fSYuval Mintz 413cee4d264SManish Chopra /* @@@tmp - it's possible we'll eventually want to handle some 414cee4d264SManish Chopra * actual commands that can arrive here, but for now this is only 415cee4d264SManish Chopra * used to complete the ramrod using the echo value on the cqe 416cee4d264SManish Chopra */ 417cee4d264SManish Chopra return qed_spq_completion(p_hwfn, cqe->echo, 0, NULL); 418cee4d264SManish Chopra } 419cee4d264SManish Chopra 420cee4d264SManish Chopra int qed_eth_cqe_completion(struct qed_hwfn *p_hwfn, 421cee4d264SManish Chopra struct eth_slow_path_rx_cqe *cqe) 422cee4d264SManish Chopra { 423cee4d264SManish Chopra int rc; 424cee4d264SManish Chopra 425cee4d264SManish Chopra rc = qed_cqe_completion(p_hwfn, cqe, PROTOCOLID_ETH); 426cee4d264SManish Chopra if (rc) 427cee4d264SManish Chopra DP_NOTICE(p_hwfn, 428cee4d264SManish Chopra "Failed to handle RXQ CQE [cmd 0x%02x]\n", 429cee4d264SManish Chopra cqe->ramrod_cmd_id); 430cee4d264SManish Chopra 431cee4d264SManish Chopra return rc; 432cee4d264SManish Chopra } 433cee4d264SManish Chopra 434cee4d264SManish Chopra /*************************************************************************** 435fe56b9e6SYuval Mintz * Slow hwfn Queue (spq) 436fe56b9e6SYuval Mintz ***************************************************************************/ 437fe56b9e6SYuval Mintz void qed_spq_setup(struct qed_hwfn *p_hwfn) 438fe56b9e6SYuval Mintz { 439fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 440fe56b9e6SYuval Mintz struct qed_spq_entry *p_virt = NULL; 441fe56b9e6SYuval Mintz dma_addr_t p_phys = 0; 442a91eb52aSYuval Mintz u32 i, capacity; 443fe56b9e6SYuval Mintz 444fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->pending); 445fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->completion_pending); 446fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->free_pool); 447fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->unlimited_pending); 448fe56b9e6SYuval Mintz spin_lock_init(&p_spq->lock); 449fe56b9e6SYuval Mintz 450fe56b9e6SYuval Mintz /* SPQ empty pool */ 451fe56b9e6SYuval Mintz p_phys = p_spq->p_phys + offsetof(struct qed_spq_entry, ramrod); 452fe56b9e6SYuval Mintz p_virt = p_spq->p_virt; 453fe56b9e6SYuval Mintz 454a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 455a91eb52aSYuval Mintz for (i = 0; i < capacity; i++) { 45694494598SYuval Mintz DMA_REGPAIR_LE(p_virt->elem.data_ptr, p_phys); 457fe56b9e6SYuval Mintz 458fe56b9e6SYuval Mintz list_add_tail(&p_virt->list, &p_spq->free_pool); 459fe56b9e6SYuval Mintz 460fe56b9e6SYuval Mintz p_virt++; 461fe56b9e6SYuval Mintz p_phys += sizeof(struct qed_spq_entry); 462fe56b9e6SYuval Mintz } 463fe56b9e6SYuval Mintz 464fe56b9e6SYuval Mintz /* Statistics */ 465fe56b9e6SYuval Mintz p_spq->normal_count = 0; 466fe56b9e6SYuval Mintz p_spq->comp_count = 0; 467fe56b9e6SYuval Mintz p_spq->comp_sent_count = 0; 468fe56b9e6SYuval Mintz p_spq->unlimited_pending_count = 0; 46976a9a364STomer Tayar 47076a9a364STomer Tayar bitmap_zero(p_spq->p_comp_bitmap, SPQ_RING_SIZE); 47176a9a364STomer Tayar p_spq->comp_bitmap_idx = 0; 472fe56b9e6SYuval Mintz 473fe56b9e6SYuval Mintz /* SPQ cid, cannot fail */ 474fe56b9e6SYuval Mintz qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_spq->cid); 475fe56b9e6SYuval Mintz qed_spq_hw_initialize(p_hwfn, p_spq); 476fe56b9e6SYuval Mintz 477fe56b9e6SYuval Mintz /* reset the chain itself */ 478fe56b9e6SYuval Mintz qed_chain_reset(&p_spq->chain); 479fe56b9e6SYuval Mintz } 480fe56b9e6SYuval Mintz 481fe56b9e6SYuval Mintz int qed_spq_alloc(struct qed_hwfn *p_hwfn) 482fe56b9e6SYuval Mintz { 483a91eb52aSYuval Mintz struct qed_spq_entry *p_virt = NULL; 484fe56b9e6SYuval Mintz struct qed_spq *p_spq = NULL; 485fe56b9e6SYuval Mintz dma_addr_t p_phys = 0; 486a91eb52aSYuval Mintz u32 capacity; 487fe56b9e6SYuval Mintz 488fe56b9e6SYuval Mintz /* SPQ struct */ 4891a635e48SYuval Mintz p_spq = kzalloc(sizeof(struct qed_spq), GFP_KERNEL); 4902591c280SJoe Perches if (!p_spq) 491fe56b9e6SYuval Mintz return -ENOMEM; 492fe56b9e6SYuval Mintz 493fe56b9e6SYuval Mintz /* SPQ ring */ 494fe56b9e6SYuval Mintz if (qed_chain_alloc(p_hwfn->cdev, 495fe56b9e6SYuval Mintz QED_CHAIN_USE_TO_PRODUCE, 496fe56b9e6SYuval Mintz QED_CHAIN_MODE_SINGLE, 497a91eb52aSYuval Mintz QED_CHAIN_CNT_TYPE_U16, 498fe56b9e6SYuval Mintz 0, /* N/A when the mode is SINGLE */ 499fe56b9e6SYuval Mintz sizeof(struct slow_path_element), 5002591c280SJoe Perches &p_spq->chain)) 501fe56b9e6SYuval Mintz goto spq_allocate_fail; 502fe56b9e6SYuval Mintz 503fe56b9e6SYuval Mintz /* allocate and fill the SPQ elements (incl. ramrod data list) */ 504a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 505fe56b9e6SYuval Mintz p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev, 5062591c280SJoe Perches capacity * sizeof(struct qed_spq_entry), 507a91eb52aSYuval Mintz &p_phys, GFP_KERNEL); 508fe56b9e6SYuval Mintz if (!p_virt) 509fe56b9e6SYuval Mintz goto spq_allocate_fail; 510fe56b9e6SYuval Mintz 511fe56b9e6SYuval Mintz p_spq->p_virt = p_virt; 512fe56b9e6SYuval Mintz p_spq->p_phys = p_phys; 513fe56b9e6SYuval Mintz p_hwfn->p_spq = p_spq; 514fe56b9e6SYuval Mintz 515fe56b9e6SYuval Mintz return 0; 516fe56b9e6SYuval Mintz 517fe56b9e6SYuval Mintz spq_allocate_fail: 518fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_spq->chain); 519fe56b9e6SYuval Mintz kfree(p_spq); 520fe56b9e6SYuval Mintz return -ENOMEM; 521fe56b9e6SYuval Mintz } 522fe56b9e6SYuval Mintz 523fe56b9e6SYuval Mintz void qed_spq_free(struct qed_hwfn *p_hwfn) 524fe56b9e6SYuval Mintz { 525fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 526a91eb52aSYuval Mintz u32 capacity; 527fe56b9e6SYuval Mintz 528fe56b9e6SYuval Mintz if (!p_spq) 529fe56b9e6SYuval Mintz return; 530fe56b9e6SYuval Mintz 531a91eb52aSYuval Mintz if (p_spq->p_virt) { 532a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 533fe56b9e6SYuval Mintz dma_free_coherent(&p_hwfn->cdev->pdev->dev, 534a91eb52aSYuval Mintz capacity * 535fe56b9e6SYuval Mintz sizeof(struct qed_spq_entry), 536a91eb52aSYuval Mintz p_spq->p_virt, p_spq->p_phys); 537a91eb52aSYuval Mintz } 538fe56b9e6SYuval Mintz 539fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_spq->chain); 540fe56b9e6SYuval Mintz ; 541fe56b9e6SYuval Mintz kfree(p_spq); 542fe56b9e6SYuval Mintz } 543fe56b9e6SYuval Mintz 5441a635e48SYuval Mintz int qed_spq_get_entry(struct qed_hwfn *p_hwfn, struct qed_spq_entry **pp_ent) 545fe56b9e6SYuval Mintz { 546fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 547fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 548fe56b9e6SYuval Mintz int rc = 0; 549fe56b9e6SYuval Mintz 550fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 551fe56b9e6SYuval Mintz 552fe56b9e6SYuval Mintz if (list_empty(&p_spq->free_pool)) { 553fe56b9e6SYuval Mintz p_ent = kzalloc(sizeof(*p_ent), GFP_ATOMIC); 554fe56b9e6SYuval Mintz if (!p_ent) { 5551a635e48SYuval Mintz DP_NOTICE(p_hwfn, 5561a635e48SYuval Mintz "Failed to allocate an SPQ entry for a pending ramrod\n"); 557fe56b9e6SYuval Mintz rc = -ENOMEM; 558fe56b9e6SYuval Mintz goto out_unlock; 559fe56b9e6SYuval Mintz } 560fe56b9e6SYuval Mintz p_ent->queue = &p_spq->unlimited_pending; 561fe56b9e6SYuval Mintz } else { 562fe56b9e6SYuval Mintz p_ent = list_first_entry(&p_spq->free_pool, 5631a635e48SYuval Mintz struct qed_spq_entry, list); 564fe56b9e6SYuval Mintz list_del(&p_ent->list); 565fe56b9e6SYuval Mintz p_ent->queue = &p_spq->pending; 566fe56b9e6SYuval Mintz } 567fe56b9e6SYuval Mintz 568fe56b9e6SYuval Mintz *pp_ent = p_ent; 569fe56b9e6SYuval Mintz 570fe56b9e6SYuval Mintz out_unlock: 571fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 572fe56b9e6SYuval Mintz return rc; 573fe56b9e6SYuval Mintz } 574fe56b9e6SYuval Mintz 575fe56b9e6SYuval Mintz /* Locked variant; Should be called while the SPQ lock is taken */ 576fe56b9e6SYuval Mintz static void __qed_spq_return_entry(struct qed_hwfn *p_hwfn, 577fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent) 578fe56b9e6SYuval Mintz { 579fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_hwfn->p_spq->free_pool); 580fe56b9e6SYuval Mintz } 581fe56b9e6SYuval Mintz 5821a635e48SYuval Mintz void qed_spq_return_entry(struct qed_hwfn *p_hwfn, struct qed_spq_entry *p_ent) 583fe56b9e6SYuval Mintz { 584fe56b9e6SYuval Mintz spin_lock_bh(&p_hwfn->p_spq->lock); 585fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 586fe56b9e6SYuval Mintz spin_unlock_bh(&p_hwfn->p_spq->lock); 587fe56b9e6SYuval Mintz } 588fe56b9e6SYuval Mintz 589fe56b9e6SYuval Mintz /** 590fe56b9e6SYuval Mintz * @brief qed_spq_add_entry - adds a new entry to the pending 591fe56b9e6SYuval Mintz * list. Should be used while lock is being held. 592fe56b9e6SYuval Mintz * 593fe56b9e6SYuval Mintz * Addes an entry to the pending list is there is room (en empty 594fe56b9e6SYuval Mintz * element is available in the free_pool), or else places the 595fe56b9e6SYuval Mintz * entry in the unlimited_pending pool. 596fe56b9e6SYuval Mintz * 597fe56b9e6SYuval Mintz * @param p_hwfn 598fe56b9e6SYuval Mintz * @param p_ent 599fe56b9e6SYuval Mintz * @param priority 600fe56b9e6SYuval Mintz * 601fe56b9e6SYuval Mintz * @return int 602fe56b9e6SYuval Mintz */ 6031a635e48SYuval Mintz static int qed_spq_add_entry(struct qed_hwfn *p_hwfn, 604fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent, 605fe56b9e6SYuval Mintz enum spq_priority priority) 606fe56b9e6SYuval Mintz { 607fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 608fe56b9e6SYuval Mintz 609fe56b9e6SYuval Mintz if (p_ent->queue == &p_spq->unlimited_pending) { 610fe56b9e6SYuval Mintz 611fe56b9e6SYuval Mintz if (list_empty(&p_spq->free_pool)) { 612fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->unlimited_pending); 613fe56b9e6SYuval Mintz p_spq->unlimited_pending_count++; 614fe56b9e6SYuval Mintz 615fe56b9e6SYuval Mintz return 0; 61676a9a364STomer Tayar } else { 61776a9a364STomer Tayar struct qed_spq_entry *p_en2; 618fe56b9e6SYuval Mintz 619fe56b9e6SYuval Mintz p_en2 = list_first_entry(&p_spq->free_pool, 6201a635e48SYuval Mintz struct qed_spq_entry, list); 621fe56b9e6SYuval Mintz list_del(&p_en2->list); 622fe56b9e6SYuval Mintz 62376a9a364STomer Tayar /* Copy the ring element physical pointer to the new 62476a9a364STomer Tayar * entry, since we are about to override the entire ring 62576a9a364STomer Tayar * entry and don't want to lose the pointer. 62676a9a364STomer Tayar */ 62776a9a364STomer Tayar p_ent->elem.data_ptr = p_en2->elem.data_ptr; 62876a9a364STomer Tayar 629fe56b9e6SYuval Mintz *p_en2 = *p_ent; 630fe56b9e6SYuval Mintz 631db511c37SYuval Mintz /* EBLOCK responsible to free the allocated p_ent */ 632db511c37SYuval Mintz if (p_ent->comp_mode != QED_SPQ_MODE_EBLOCK) 633fe56b9e6SYuval Mintz kfree(p_ent); 634fe56b9e6SYuval Mintz 635fe56b9e6SYuval Mintz p_ent = p_en2; 636fe56b9e6SYuval Mintz } 63776a9a364STomer Tayar } 638fe56b9e6SYuval Mintz 639fe56b9e6SYuval Mintz /* entry is to be placed in 'pending' queue */ 640fe56b9e6SYuval Mintz switch (priority) { 641fe56b9e6SYuval Mintz case QED_SPQ_PRIORITY_NORMAL: 642fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->pending); 643fe56b9e6SYuval Mintz p_spq->normal_count++; 644fe56b9e6SYuval Mintz break; 645fe56b9e6SYuval Mintz case QED_SPQ_PRIORITY_HIGH: 646fe56b9e6SYuval Mintz list_add(&p_ent->list, &p_spq->pending); 647fe56b9e6SYuval Mintz p_spq->high_count++; 648fe56b9e6SYuval Mintz break; 649fe56b9e6SYuval Mintz default: 650fe56b9e6SYuval Mintz return -EINVAL; 651fe56b9e6SYuval Mintz } 652fe56b9e6SYuval Mintz 653fe56b9e6SYuval Mintz return 0; 654fe56b9e6SYuval Mintz } 655fe56b9e6SYuval Mintz 656fe56b9e6SYuval Mintz /*************************************************************************** 657fe56b9e6SYuval Mintz * Accessor 658fe56b9e6SYuval Mintz ***************************************************************************/ 659fe56b9e6SYuval Mintz u32 qed_spq_get_cid(struct qed_hwfn *p_hwfn) 660fe56b9e6SYuval Mintz { 661fe56b9e6SYuval Mintz if (!p_hwfn->p_spq) 662fe56b9e6SYuval Mintz return 0xffffffff; /* illegal */ 663fe56b9e6SYuval Mintz return p_hwfn->p_spq->cid; 664fe56b9e6SYuval Mintz } 665fe56b9e6SYuval Mintz 666fe56b9e6SYuval Mintz /*************************************************************************** 667fe56b9e6SYuval Mintz * Posting new Ramrods 668fe56b9e6SYuval Mintz ***************************************************************************/ 669fe56b9e6SYuval Mintz static int qed_spq_post_list(struct qed_hwfn *p_hwfn, 6701a635e48SYuval Mintz struct list_head *head, u32 keep_reserve) 671fe56b9e6SYuval Mintz { 672fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 673fe56b9e6SYuval Mintz int rc; 674fe56b9e6SYuval Mintz 675fe56b9e6SYuval Mintz while (qed_chain_get_elem_left(&p_spq->chain) > keep_reserve && 676fe56b9e6SYuval Mintz !list_empty(head)) { 677fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = 678fe56b9e6SYuval Mintz list_first_entry(head, struct qed_spq_entry, list); 679fe56b9e6SYuval Mintz list_del(&p_ent->list); 680fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->completion_pending); 681fe56b9e6SYuval Mintz p_spq->comp_sent_count++; 682fe56b9e6SYuval Mintz 683fe56b9e6SYuval Mintz rc = qed_spq_hw_post(p_hwfn, p_spq, p_ent); 684fe56b9e6SYuval Mintz if (rc) { 685fe56b9e6SYuval Mintz list_del(&p_ent->list); 686fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 687fe56b9e6SYuval Mintz return rc; 688fe56b9e6SYuval Mintz } 689fe56b9e6SYuval Mintz } 690fe56b9e6SYuval Mintz 691fe56b9e6SYuval Mintz return 0; 692fe56b9e6SYuval Mintz } 693fe56b9e6SYuval Mintz 694fe56b9e6SYuval Mintz static int qed_spq_pend_post(struct qed_hwfn *p_hwfn) 695fe56b9e6SYuval Mintz { 696fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 697fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 698fe56b9e6SYuval Mintz 699fe56b9e6SYuval Mintz while (!list_empty(&p_spq->free_pool)) { 700fe56b9e6SYuval Mintz if (list_empty(&p_spq->unlimited_pending)) 701fe56b9e6SYuval Mintz break; 702fe56b9e6SYuval Mintz 703fe56b9e6SYuval Mintz p_ent = list_first_entry(&p_spq->unlimited_pending, 7041a635e48SYuval Mintz struct qed_spq_entry, list); 705fe56b9e6SYuval Mintz if (!p_ent) 706fe56b9e6SYuval Mintz return -EINVAL; 707fe56b9e6SYuval Mintz 708fe56b9e6SYuval Mintz list_del(&p_ent->list); 709fe56b9e6SYuval Mintz 710fe56b9e6SYuval Mintz qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); 711fe56b9e6SYuval Mintz } 712fe56b9e6SYuval Mintz 713fe56b9e6SYuval Mintz return qed_spq_post_list(p_hwfn, &p_spq->pending, 714fe56b9e6SYuval Mintz SPQ_HIGH_PRI_RESERVE_DEFAULT); 715fe56b9e6SYuval Mintz } 716fe56b9e6SYuval Mintz 717fe56b9e6SYuval Mintz int qed_spq_post(struct qed_hwfn *p_hwfn, 7181a635e48SYuval Mintz struct qed_spq_entry *p_ent, u8 *fw_return_code) 719fe56b9e6SYuval Mintz { 720fe56b9e6SYuval Mintz int rc = 0; 721fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn ? p_hwfn->p_spq : NULL; 722fe56b9e6SYuval Mintz bool b_ret_ent = true; 723fe56b9e6SYuval Mintz 724fe56b9e6SYuval Mintz if (!p_hwfn) 725fe56b9e6SYuval Mintz return -EINVAL; 726fe56b9e6SYuval Mintz 727fe56b9e6SYuval Mintz if (!p_ent) { 728fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Got a NULL pointer\n"); 729fe56b9e6SYuval Mintz return -EINVAL; 730fe56b9e6SYuval Mintz } 731fe56b9e6SYuval Mintz 732fe56b9e6SYuval Mintz /* Complete the entry */ 733fe56b9e6SYuval Mintz rc = qed_spq_fill_entry(p_hwfn, p_ent); 734fe56b9e6SYuval Mintz 735fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 736fe56b9e6SYuval Mintz 737fe56b9e6SYuval Mintz /* Check return value after LOCK is taken for cleaner error flow */ 738fe56b9e6SYuval Mintz if (rc) 739fe56b9e6SYuval Mintz goto spq_post_fail; 740fe56b9e6SYuval Mintz 741fe56b9e6SYuval Mintz /* Add the request to the pending queue */ 742fe56b9e6SYuval Mintz rc = qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); 743fe56b9e6SYuval Mintz if (rc) 744fe56b9e6SYuval Mintz goto spq_post_fail; 745fe56b9e6SYuval Mintz 746fe56b9e6SYuval Mintz rc = qed_spq_pend_post(p_hwfn); 747fe56b9e6SYuval Mintz if (rc) { 748fe56b9e6SYuval Mintz /* Since it's possible that pending failed for a different 749fe56b9e6SYuval Mintz * entry [although unlikely], the failed entry was already 750fe56b9e6SYuval Mintz * dealt with; No need to return it here. 751fe56b9e6SYuval Mintz */ 752fe56b9e6SYuval Mintz b_ret_ent = false; 753fe56b9e6SYuval Mintz goto spq_post_fail; 754fe56b9e6SYuval Mintz } 755fe56b9e6SYuval Mintz 756fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 757fe56b9e6SYuval Mintz 758fe56b9e6SYuval Mintz if (p_ent->comp_mode == QED_SPQ_MODE_EBLOCK) { 759fe56b9e6SYuval Mintz /* For entries in QED BLOCK mode, the completion code cannot 760fe56b9e6SYuval Mintz * perform the necessary cleanup - if it did, we couldn't 761fe56b9e6SYuval Mintz * access p_ent here to see whether it's successful or not. 762fe56b9e6SYuval Mintz * Thus, after gaining the answer perform the cleanup here. 763fe56b9e6SYuval Mintz */ 764c59f5291SYuval Mintz rc = qed_spq_block(p_hwfn, p_ent, fw_return_code, 765c59f5291SYuval Mintz p_ent->queue == &p_spq->unlimited_pending); 766db511c37SYuval Mintz 767db511c37SYuval Mintz if (p_ent->queue == &p_spq->unlimited_pending) { 768db511c37SYuval Mintz /* This is an allocated p_ent which does not need to 769db511c37SYuval Mintz * return to pool. 770db511c37SYuval Mintz */ 771db511c37SYuval Mintz kfree(p_ent); 772db511c37SYuval Mintz return rc; 773db511c37SYuval Mintz } 774db511c37SYuval Mintz 775fe56b9e6SYuval Mintz if (rc) 776fe56b9e6SYuval Mintz goto spq_post_fail2; 777fe56b9e6SYuval Mintz 778fe56b9e6SYuval Mintz /* return to pool */ 779fe56b9e6SYuval Mintz qed_spq_return_entry(p_hwfn, p_ent); 780fe56b9e6SYuval Mintz } 781fe56b9e6SYuval Mintz return rc; 782fe56b9e6SYuval Mintz 783fe56b9e6SYuval Mintz spq_post_fail2: 784fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 785fe56b9e6SYuval Mintz list_del(&p_ent->list); 786fe56b9e6SYuval Mintz qed_chain_return_produced(&p_spq->chain); 787fe56b9e6SYuval Mintz 788fe56b9e6SYuval Mintz spq_post_fail: 789fe56b9e6SYuval Mintz /* return to the free pool */ 790fe56b9e6SYuval Mintz if (b_ret_ent) 791fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 792fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 793fe56b9e6SYuval Mintz 794fe56b9e6SYuval Mintz return rc; 795fe56b9e6SYuval Mintz } 796fe56b9e6SYuval Mintz 797fe56b9e6SYuval Mintz int qed_spq_completion(struct qed_hwfn *p_hwfn, 798fe56b9e6SYuval Mintz __le16 echo, 799fe56b9e6SYuval Mintz u8 fw_return_code, 800fe56b9e6SYuval Mintz union event_ring_data *p_data) 801fe56b9e6SYuval Mintz { 802fe56b9e6SYuval Mintz struct qed_spq *p_spq; 803fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 804fe56b9e6SYuval Mintz struct qed_spq_entry *tmp; 805fe56b9e6SYuval Mintz struct qed_spq_entry *found = NULL; 806fe56b9e6SYuval Mintz int rc; 807fe56b9e6SYuval Mintz 808fe56b9e6SYuval Mintz if (!p_hwfn) 809fe56b9e6SYuval Mintz return -EINVAL; 810fe56b9e6SYuval Mintz 811fe56b9e6SYuval Mintz p_spq = p_hwfn->p_spq; 812fe56b9e6SYuval Mintz if (!p_spq) 813fe56b9e6SYuval Mintz return -EINVAL; 814fe56b9e6SYuval Mintz 815fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 8161a635e48SYuval Mintz list_for_each_entry_safe(p_ent, tmp, &p_spq->completion_pending, list) { 817fe56b9e6SYuval Mintz if (p_ent->elem.hdr.echo == echo) { 81876a9a364STomer Tayar u16 pos = le16_to_cpu(echo) % SPQ_RING_SIZE; 81976a9a364STomer Tayar 820fe56b9e6SYuval Mintz list_del(&p_ent->list); 821fe56b9e6SYuval Mintz 82276a9a364STomer Tayar /* Avoid overriding of SPQ entries when getting 82376a9a364STomer Tayar * out-of-order completions, by marking the completions 82476a9a364STomer Tayar * in a bitmap and increasing the chain consumer only 82576a9a364STomer Tayar * for the first successive completed entries. 82676a9a364STomer Tayar */ 82759d3f1ceSManish Chopra __set_bit(pos, p_spq->p_comp_bitmap); 82876a9a364STomer Tayar 82976a9a364STomer Tayar while (test_bit(p_spq->comp_bitmap_idx, 83076a9a364STomer Tayar p_spq->p_comp_bitmap)) { 83159d3f1ceSManish Chopra __clear_bit(p_spq->comp_bitmap_idx, 83259d3f1ceSManish Chopra p_spq->p_comp_bitmap); 83376a9a364STomer Tayar p_spq->comp_bitmap_idx++; 834fe56b9e6SYuval Mintz qed_chain_return_produced(&p_spq->chain); 83576a9a364STomer Tayar } 83676a9a364STomer Tayar 837fe56b9e6SYuval Mintz p_spq->comp_count++; 838fe56b9e6SYuval Mintz found = p_ent; 839fe56b9e6SYuval Mintz break; 840fe56b9e6SYuval Mintz } 84176a9a364STomer Tayar 84276a9a364STomer Tayar /* This is relatively uncommon - depends on scenarios 84376a9a364STomer Tayar * which have mutliple per-PF sent ramrods. 84476a9a364STomer Tayar */ 84576a9a364STomer Tayar DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 84676a9a364STomer Tayar "Got completion for echo %04x - doesn't match echo %04x in completion pending list\n", 84776a9a364STomer Tayar le16_to_cpu(echo), 84876a9a364STomer Tayar le16_to_cpu(p_ent->elem.hdr.echo)); 849fe56b9e6SYuval Mintz } 850fe56b9e6SYuval Mintz 851fe56b9e6SYuval Mintz /* Release lock before callback, as callback may post 852fe56b9e6SYuval Mintz * an additional ramrod. 853fe56b9e6SYuval Mintz */ 854fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 855fe56b9e6SYuval Mintz 856fe56b9e6SYuval Mintz if (!found) { 857fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, 858525ef5c0SYuval Mintz "Failed to find an entry this EQE [echo %04x] completes\n", 859525ef5c0SYuval Mintz le16_to_cpu(echo)); 860fe56b9e6SYuval Mintz return -EEXIST; 861fe56b9e6SYuval Mintz } 862fe56b9e6SYuval Mintz 863525ef5c0SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 864525ef5c0SYuval Mintz "Complete EQE [echo %04x]: func %p cookie %p)\n", 865525ef5c0SYuval Mintz le16_to_cpu(echo), 866fe56b9e6SYuval Mintz p_ent->comp_cb.function, p_ent->comp_cb.cookie); 867fe56b9e6SYuval Mintz if (found->comp_cb.function) 868fe56b9e6SYuval Mintz found->comp_cb.function(p_hwfn, found->comp_cb.cookie, p_data, 869fe56b9e6SYuval Mintz fw_return_code); 870525ef5c0SYuval Mintz else 871525ef5c0SYuval Mintz DP_VERBOSE(p_hwfn, 872525ef5c0SYuval Mintz QED_MSG_SPQ, 873525ef5c0SYuval Mintz "Got a completion without a callback function\n"); 874fe56b9e6SYuval Mintz 875db511c37SYuval Mintz if ((found->comp_mode != QED_SPQ_MODE_EBLOCK) || 876db511c37SYuval Mintz (found->queue == &p_spq->unlimited_pending)) 877db511c37SYuval Mintz /* EBLOCK is responsible for returning its own entry into the 878db511c37SYuval Mintz * free list, unless it originally added the entry into the 879db511c37SYuval Mintz * unlimited pending list. 880db511c37SYuval Mintz */ 881fe56b9e6SYuval Mintz qed_spq_return_entry(p_hwfn, found); 882fe56b9e6SYuval Mintz 883fe56b9e6SYuval Mintz /* Attempt to post pending requests */ 884fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 885fe56b9e6SYuval Mintz rc = qed_spq_pend_post(p_hwfn); 886fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 887fe56b9e6SYuval Mintz 888fe56b9e6SYuval Mintz return rc; 889fe56b9e6SYuval Mintz } 890fe56b9e6SYuval Mintz 891fe56b9e6SYuval Mintz struct qed_consq *qed_consq_alloc(struct qed_hwfn *p_hwfn) 892fe56b9e6SYuval Mintz { 893fe56b9e6SYuval Mintz struct qed_consq *p_consq; 894fe56b9e6SYuval Mintz 895fe56b9e6SYuval Mintz /* Allocate ConsQ struct */ 89660fffb3bSYuval Mintz p_consq = kzalloc(sizeof(*p_consq), GFP_KERNEL); 8972591c280SJoe Perches if (!p_consq) 898fe56b9e6SYuval Mintz return NULL; 899fe56b9e6SYuval Mintz 900fe56b9e6SYuval Mintz /* Allocate and initialize EQ chain*/ 901fe56b9e6SYuval Mintz if (qed_chain_alloc(p_hwfn->cdev, 902fe56b9e6SYuval Mintz QED_CHAIN_USE_TO_PRODUCE, 903fe56b9e6SYuval Mintz QED_CHAIN_MODE_PBL, 904a91eb52aSYuval Mintz QED_CHAIN_CNT_TYPE_U16, 905fe56b9e6SYuval Mintz QED_CHAIN_PAGE_SIZE / 0x80, 9062591c280SJoe Perches 0x80, &p_consq->chain)) 907fe56b9e6SYuval Mintz goto consq_allocate_fail; 908fe56b9e6SYuval Mintz 909fe56b9e6SYuval Mintz return p_consq; 910fe56b9e6SYuval Mintz 911fe56b9e6SYuval Mintz consq_allocate_fail: 912fe56b9e6SYuval Mintz qed_consq_free(p_hwfn, p_consq); 913fe56b9e6SYuval Mintz return NULL; 914fe56b9e6SYuval Mintz } 915fe56b9e6SYuval Mintz 9161a635e48SYuval Mintz void qed_consq_setup(struct qed_hwfn *p_hwfn, struct qed_consq *p_consq) 917fe56b9e6SYuval Mintz { 918fe56b9e6SYuval Mintz qed_chain_reset(&p_consq->chain); 919fe56b9e6SYuval Mintz } 920fe56b9e6SYuval Mintz 9211a635e48SYuval Mintz void qed_consq_free(struct qed_hwfn *p_hwfn, struct qed_consq *p_consq) 922fe56b9e6SYuval Mintz { 923fe56b9e6SYuval Mintz if (!p_consq) 924fe56b9e6SYuval Mintz return; 925fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_consq->chain); 926fe56b9e6SYuval Mintz kfree(p_consq); 927fe56b9e6SYuval Mintz } 928