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" 31fe56b9e6SYuval Mintz 32fe56b9e6SYuval Mintz /*************************************************************************** 33fe56b9e6SYuval Mintz * Structures & Definitions 34fe56b9e6SYuval Mintz ***************************************************************************/ 35fe56b9e6SYuval Mintz 36fe56b9e6SYuval Mintz #define SPQ_HIGH_PRI_RESERVE_DEFAULT (1) 37fe56b9e6SYuval Mintz #define SPQ_BLOCK_SLEEP_LENGTH (1000) 38fe56b9e6SYuval Mintz 39fe56b9e6SYuval Mintz /*************************************************************************** 40fe56b9e6SYuval Mintz * Blocking Imp. (BLOCK/EBLOCK mode) 41fe56b9e6SYuval Mintz ***************************************************************************/ 42fe56b9e6SYuval Mintz static void qed_spq_blocking_cb(struct qed_hwfn *p_hwfn, 43fe56b9e6SYuval Mintz void *cookie, 44fe56b9e6SYuval Mintz union event_ring_data *data, 45fe56b9e6SYuval Mintz u8 fw_return_code) 46fe56b9e6SYuval Mintz { 47fe56b9e6SYuval Mintz struct qed_spq_comp_done *comp_done; 48fe56b9e6SYuval Mintz 49fe56b9e6SYuval Mintz comp_done = (struct qed_spq_comp_done *)cookie; 50fe56b9e6SYuval Mintz 51fe56b9e6SYuval Mintz comp_done->done = 0x1; 52fe56b9e6SYuval Mintz comp_done->fw_return_code = fw_return_code; 53fe56b9e6SYuval Mintz 54fe56b9e6SYuval Mintz /* make update visible to waiting thread */ 55fe56b9e6SYuval Mintz smp_wmb(); 56fe56b9e6SYuval Mintz } 57fe56b9e6SYuval Mintz 58fe56b9e6SYuval Mintz static int qed_spq_block(struct qed_hwfn *p_hwfn, 59fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent, 60fe56b9e6SYuval Mintz u8 *p_fw_ret) 61fe56b9e6SYuval Mintz { 62fe56b9e6SYuval Mintz int sleep_count = SPQ_BLOCK_SLEEP_LENGTH; 63fe56b9e6SYuval Mintz struct qed_spq_comp_done *comp_done; 64fe56b9e6SYuval Mintz int rc; 65fe56b9e6SYuval Mintz 66fe56b9e6SYuval Mintz comp_done = (struct qed_spq_comp_done *)p_ent->comp_cb.cookie; 67fe56b9e6SYuval Mintz while (sleep_count) { 68fe56b9e6SYuval Mintz /* validate we receive completion update */ 69fe56b9e6SYuval Mintz smp_rmb(); 70fe56b9e6SYuval Mintz if (comp_done->done == 1) { 71fe56b9e6SYuval Mintz if (p_fw_ret) 72fe56b9e6SYuval Mintz *p_fw_ret = comp_done->fw_return_code; 73fe56b9e6SYuval Mintz return 0; 74fe56b9e6SYuval Mintz } 75fe56b9e6SYuval Mintz usleep_range(5000, 10000); 76fe56b9e6SYuval Mintz sleep_count--; 77fe56b9e6SYuval Mintz } 78fe56b9e6SYuval Mintz 79fe56b9e6SYuval Mintz DP_INFO(p_hwfn, "Ramrod is stuck, requesting MCP drain\n"); 80fe56b9e6SYuval Mintz rc = qed_mcp_drain(p_hwfn, p_hwfn->p_main_ptt); 81fe56b9e6SYuval Mintz if (rc != 0) 82fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "MCP drain failed\n"); 83fe56b9e6SYuval Mintz 84fe56b9e6SYuval Mintz /* Retry after drain */ 85fe56b9e6SYuval Mintz sleep_count = SPQ_BLOCK_SLEEP_LENGTH; 86fe56b9e6SYuval Mintz while (sleep_count) { 87fe56b9e6SYuval Mintz /* validate we receive completion update */ 88fe56b9e6SYuval Mintz smp_rmb(); 89fe56b9e6SYuval Mintz if (comp_done->done == 1) { 90fe56b9e6SYuval Mintz if (p_fw_ret) 91fe56b9e6SYuval Mintz *p_fw_ret = comp_done->fw_return_code; 92fe56b9e6SYuval Mintz return 0; 93fe56b9e6SYuval Mintz } 94fe56b9e6SYuval Mintz usleep_range(5000, 10000); 95fe56b9e6SYuval Mintz sleep_count--; 96fe56b9e6SYuval Mintz } 97fe56b9e6SYuval Mintz 98fe56b9e6SYuval Mintz if (comp_done->done == 1) { 99fe56b9e6SYuval Mintz if (p_fw_ret) 100fe56b9e6SYuval Mintz *p_fw_ret = comp_done->fw_return_code; 101fe56b9e6SYuval Mintz return 0; 102fe56b9e6SYuval Mintz } 103fe56b9e6SYuval Mintz 104fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Ramrod is stuck, MCP drain failed\n"); 105fe56b9e6SYuval Mintz 106fe56b9e6SYuval Mintz return -EBUSY; 107fe56b9e6SYuval Mintz } 108fe56b9e6SYuval Mintz 109fe56b9e6SYuval Mintz /*************************************************************************** 110fe56b9e6SYuval Mintz * SPQ entries inner API 111fe56b9e6SYuval Mintz ***************************************************************************/ 112fe56b9e6SYuval Mintz static int 113fe56b9e6SYuval Mintz qed_spq_fill_entry(struct qed_hwfn *p_hwfn, 114fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent) 115fe56b9e6SYuval Mintz { 116fe56b9e6SYuval Mintz p_ent->flags = 0; 117fe56b9e6SYuval Mintz 118fe56b9e6SYuval Mintz switch (p_ent->comp_mode) { 119fe56b9e6SYuval Mintz case QED_SPQ_MODE_EBLOCK: 120fe56b9e6SYuval Mintz case QED_SPQ_MODE_BLOCK: 121fe56b9e6SYuval Mintz p_ent->comp_cb.function = qed_spq_blocking_cb; 122fe56b9e6SYuval Mintz break; 123fe56b9e6SYuval Mintz case QED_SPQ_MODE_CB: 124fe56b9e6SYuval Mintz break; 125fe56b9e6SYuval Mintz default: 126fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Unknown SPQE completion mode %d\n", 127fe56b9e6SYuval Mintz p_ent->comp_mode); 128fe56b9e6SYuval Mintz return -EINVAL; 129fe56b9e6SYuval Mintz } 130fe56b9e6SYuval Mintz 131fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 132fe56b9e6SYuval Mintz "Ramrod header: [CID 0x%08x CMD 0x%02x protocol 0x%02x] Data pointer: [%08x:%08x] Completion Mode: %s\n", 133fe56b9e6SYuval Mintz p_ent->elem.hdr.cid, 134fe56b9e6SYuval Mintz p_ent->elem.hdr.cmd_id, 135fe56b9e6SYuval Mintz p_ent->elem.hdr.protocol_id, 136fe56b9e6SYuval Mintz p_ent->elem.data_ptr.hi, 137fe56b9e6SYuval Mintz p_ent->elem.data_ptr.lo, 138fe56b9e6SYuval Mintz D_TRINE(p_ent->comp_mode, QED_SPQ_MODE_EBLOCK, 139fe56b9e6SYuval Mintz QED_SPQ_MODE_BLOCK, "MODE_EBLOCK", "MODE_BLOCK", 140fe56b9e6SYuval Mintz "MODE_CB")); 141fe56b9e6SYuval Mintz 142fe56b9e6SYuval Mintz return 0; 143fe56b9e6SYuval Mintz } 144fe56b9e6SYuval Mintz 145fe56b9e6SYuval Mintz /*************************************************************************** 146fe56b9e6SYuval Mintz * HSI access 147fe56b9e6SYuval Mintz ***************************************************************************/ 148fe56b9e6SYuval Mintz static void qed_spq_hw_initialize(struct qed_hwfn *p_hwfn, 149fe56b9e6SYuval Mintz struct qed_spq *p_spq) 150fe56b9e6SYuval Mintz { 151fe56b9e6SYuval Mintz u16 pq; 152fe56b9e6SYuval Mintz struct qed_cxt_info cxt_info; 153fe56b9e6SYuval Mintz struct core_conn_context *p_cxt; 154fe56b9e6SYuval Mintz union qed_qm_pq_params pq_params; 155fe56b9e6SYuval Mintz int rc; 156fe56b9e6SYuval Mintz 157fe56b9e6SYuval Mintz cxt_info.iid = p_spq->cid; 158fe56b9e6SYuval Mintz 159fe56b9e6SYuval Mintz rc = qed_cxt_get_cid_info(p_hwfn, &cxt_info); 160fe56b9e6SYuval Mintz 161fe56b9e6SYuval Mintz if (rc < 0) { 162fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Cannot find context info for cid=%d\n", 163fe56b9e6SYuval Mintz p_spq->cid); 164fe56b9e6SYuval Mintz return; 165fe56b9e6SYuval Mintz } 166fe56b9e6SYuval Mintz 167fe56b9e6SYuval Mintz p_cxt = cxt_info.p_cxt; 168fe56b9e6SYuval Mintz 169fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags10, 170fe56b9e6SYuval Mintz XSTORM_CORE_CONN_AG_CTX_DQ_CF_EN, 1); 171fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags1, 172fe56b9e6SYuval Mintz XSTORM_CORE_CONN_AG_CTX_DQ_CF_ACTIVE, 1); 173fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags9, 174fe56b9e6SYuval Mintz XSTORM_CORE_CONN_AG_CTX_CONSOLID_PROD_CF_EN, 1); 175fe56b9e6SYuval Mintz 176fe56b9e6SYuval Mintz /* QM physical queue */ 177fe56b9e6SYuval Mintz memset(&pq_params, 0, sizeof(pq_params)); 178fe56b9e6SYuval Mintz pq_params.core.tc = LB_TC; 179fe56b9e6SYuval Mintz pq = qed_get_qm_pq(p_hwfn, PROTOCOLID_CORE, &pq_params); 180fe56b9e6SYuval Mintz p_cxt->xstorm_ag_context.physical_q0 = cpu_to_le16(pq); 181fe56b9e6SYuval Mintz 182fe56b9e6SYuval Mintz p_cxt->xstorm_st_context.spq_base_lo = 183fe56b9e6SYuval Mintz DMA_LO_LE(p_spq->chain.p_phys_addr); 184fe56b9e6SYuval Mintz p_cxt->xstorm_st_context.spq_base_hi = 185fe56b9e6SYuval Mintz DMA_HI_LE(p_spq->chain.p_phys_addr); 186fe56b9e6SYuval Mintz 18794494598SYuval Mintz DMA_REGPAIR_LE(p_cxt->xstorm_st_context.consolid_base_addr, 18894494598SYuval Mintz p_hwfn->p_consq->chain.p_phys_addr); 189fe56b9e6SYuval Mintz } 190fe56b9e6SYuval Mintz 191fe56b9e6SYuval Mintz static int qed_spq_hw_post(struct qed_hwfn *p_hwfn, 192fe56b9e6SYuval Mintz struct qed_spq *p_spq, 193fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent) 194fe56b9e6SYuval Mintz { 195fe56b9e6SYuval Mintz struct qed_chain *p_chain = &p_hwfn->p_spq->chain; 19676a9a364STomer Tayar u16 echo = qed_chain_get_prod_idx(p_chain); 197fe56b9e6SYuval Mintz struct slow_path_element *elem; 198fe56b9e6SYuval Mintz struct core_db_data db; 199fe56b9e6SYuval Mintz 20076a9a364STomer Tayar p_ent->elem.hdr.echo = cpu_to_le16(echo); 201fe56b9e6SYuval Mintz elem = qed_chain_produce(p_chain); 202fe56b9e6SYuval Mintz if (!elem) { 203fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Failed to produce from SPQ chain\n"); 204fe56b9e6SYuval Mintz return -EINVAL; 205fe56b9e6SYuval Mintz } 206fe56b9e6SYuval Mintz 207fe56b9e6SYuval Mintz *elem = p_ent->elem; /* struct assignment */ 208fe56b9e6SYuval Mintz 209fe56b9e6SYuval Mintz /* send a doorbell on the slow hwfn session */ 210fe56b9e6SYuval Mintz memset(&db, 0, sizeof(db)); 211fe56b9e6SYuval Mintz SET_FIELD(db.params, CORE_DB_DATA_DEST, DB_DEST_XCM); 212fe56b9e6SYuval Mintz SET_FIELD(db.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET); 213fe56b9e6SYuval Mintz SET_FIELD(db.params, CORE_DB_DATA_AGG_VAL_SEL, 214fe56b9e6SYuval Mintz DQ_XCM_CORE_SPQ_PROD_CMD); 215fe56b9e6SYuval Mintz db.agg_flags = DQ_XCM_CORE_DQ_CF_CMD; 216fe56b9e6SYuval Mintz 217fe56b9e6SYuval Mintz /* validate producer is up to-date */ 218fe56b9e6SYuval Mintz rmb(); 219fe56b9e6SYuval Mintz 220fe56b9e6SYuval Mintz db.spq_prod = cpu_to_le16(qed_chain_get_prod_idx(p_chain)); 221fe56b9e6SYuval Mintz 222fe56b9e6SYuval Mintz /* do not reorder */ 223fe56b9e6SYuval Mintz barrier(); 224fe56b9e6SYuval Mintz 225fe56b9e6SYuval Mintz DOORBELL(p_hwfn, qed_db_addr(p_spq->cid, DQ_DEMS_LEGACY), *(u32 *)&db); 226fe56b9e6SYuval Mintz 227fe56b9e6SYuval Mintz /* make sure doorbell is rang */ 228fe56b9e6SYuval Mintz mmiowb(); 229fe56b9e6SYuval Mintz 230fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 231fe56b9e6SYuval Mintz "Doorbelled [0x%08x, CID 0x%08x] with Flags: %02x agg_params: %02x, prod: %04x\n", 232fe56b9e6SYuval Mintz qed_db_addr(p_spq->cid, DQ_DEMS_LEGACY), 233fe56b9e6SYuval Mintz p_spq->cid, db.params, db.agg_flags, 234fe56b9e6SYuval Mintz qed_chain_get_prod_idx(p_chain)); 235fe56b9e6SYuval Mintz 236fe56b9e6SYuval Mintz return 0; 237fe56b9e6SYuval Mintz } 238fe56b9e6SYuval Mintz 239fe56b9e6SYuval Mintz /*************************************************************************** 240fe56b9e6SYuval Mintz * Asynchronous events 241fe56b9e6SYuval Mintz ***************************************************************************/ 242fe56b9e6SYuval Mintz static int 243fe56b9e6SYuval Mintz qed_async_event_completion(struct qed_hwfn *p_hwfn, 244fe56b9e6SYuval Mintz struct event_ring_entry *p_eqe) 245fe56b9e6SYuval Mintz { 24637bff2b9SYuval Mintz switch (p_eqe->protocol_id) { 24737bff2b9SYuval Mintz case PROTOCOLID_COMMON: 24837bff2b9SYuval Mintz return qed_sriov_eqe_event(p_hwfn, 24937bff2b9SYuval Mintz p_eqe->opcode, 25037bff2b9SYuval Mintz p_eqe->echo, &p_eqe->data); 25137bff2b9SYuval Mintz default: 252fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, 253fe56b9e6SYuval Mintz "Unknown Async completion for protocol: %d\n", 254fe56b9e6SYuval Mintz p_eqe->protocol_id); 255fe56b9e6SYuval Mintz return -EINVAL; 256fe56b9e6SYuval Mintz } 25737bff2b9SYuval Mintz } 258fe56b9e6SYuval Mintz 259fe56b9e6SYuval Mintz /*************************************************************************** 260fe56b9e6SYuval Mintz * EQ API 261fe56b9e6SYuval Mintz ***************************************************************************/ 262fe56b9e6SYuval Mintz void qed_eq_prod_update(struct qed_hwfn *p_hwfn, 263fe56b9e6SYuval Mintz u16 prod) 264fe56b9e6SYuval Mintz { 265fe56b9e6SYuval Mintz u32 addr = GTT_BAR0_MAP_REG_USDM_RAM + 266fe56b9e6SYuval Mintz USTORM_EQE_CONS_OFFSET(p_hwfn->rel_pf_id); 267fe56b9e6SYuval Mintz 268fe56b9e6SYuval Mintz REG_WR16(p_hwfn, addr, prod); 269fe56b9e6SYuval Mintz 270fe56b9e6SYuval Mintz /* keep prod updates ordered */ 271fe56b9e6SYuval Mintz mmiowb(); 272fe56b9e6SYuval Mintz } 273fe56b9e6SYuval Mintz 274fe56b9e6SYuval Mintz int qed_eq_completion(struct qed_hwfn *p_hwfn, 275fe56b9e6SYuval Mintz void *cookie) 276fe56b9e6SYuval Mintz 277fe56b9e6SYuval Mintz { 278fe56b9e6SYuval Mintz struct qed_eq *p_eq = cookie; 279fe56b9e6SYuval Mintz struct qed_chain *p_chain = &p_eq->chain; 280fe56b9e6SYuval Mintz int rc = 0; 281fe56b9e6SYuval Mintz 282fe56b9e6SYuval Mintz /* take a snapshot of the FW consumer */ 283fe56b9e6SYuval Mintz u16 fw_cons_idx = le16_to_cpu(*p_eq->p_fw_cons); 284fe56b9e6SYuval Mintz 285fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, "fw_cons_idx %x\n", fw_cons_idx); 286fe56b9e6SYuval Mintz 287fe56b9e6SYuval Mintz /* Need to guarantee the fw_cons index we use points to a usuable 288fe56b9e6SYuval Mintz * element (to comply with our chain), so our macros would comply 289fe56b9e6SYuval Mintz */ 290fe56b9e6SYuval Mintz if ((fw_cons_idx & qed_chain_get_usable_per_page(p_chain)) == 291fe56b9e6SYuval Mintz qed_chain_get_usable_per_page(p_chain)) 292fe56b9e6SYuval Mintz fw_cons_idx += qed_chain_get_unusable_per_page(p_chain); 293fe56b9e6SYuval Mintz 294fe56b9e6SYuval Mintz /* Complete current segment of eq entries */ 295fe56b9e6SYuval Mintz while (fw_cons_idx != qed_chain_get_cons_idx(p_chain)) { 296fe56b9e6SYuval Mintz struct event_ring_entry *p_eqe = qed_chain_consume(p_chain); 297fe56b9e6SYuval Mintz 298fe56b9e6SYuval Mintz if (!p_eqe) { 299fe56b9e6SYuval Mintz rc = -EINVAL; 300fe56b9e6SYuval Mintz break; 301fe56b9e6SYuval Mintz } 302fe56b9e6SYuval Mintz 303fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 304fe56b9e6SYuval Mintz "op %x prot %x res0 %x echo %x fwret %x flags %x\n", 305fe56b9e6SYuval Mintz p_eqe->opcode, 306fe56b9e6SYuval Mintz p_eqe->protocol_id, 307fe56b9e6SYuval Mintz p_eqe->reserved0, 308fe56b9e6SYuval Mintz le16_to_cpu(p_eqe->echo), 309fe56b9e6SYuval Mintz p_eqe->fw_return_code, 310fe56b9e6SYuval Mintz p_eqe->flags); 311fe56b9e6SYuval Mintz 312fe56b9e6SYuval Mintz if (GET_FIELD(p_eqe->flags, EVENT_RING_ENTRY_ASYNC)) { 313fe56b9e6SYuval Mintz if (qed_async_event_completion(p_hwfn, p_eqe)) 314fe56b9e6SYuval Mintz rc = -EINVAL; 315fe56b9e6SYuval Mintz } else if (qed_spq_completion(p_hwfn, 316fe56b9e6SYuval Mintz p_eqe->echo, 317fe56b9e6SYuval Mintz p_eqe->fw_return_code, 318fe56b9e6SYuval Mintz &p_eqe->data)) { 319fe56b9e6SYuval Mintz rc = -EINVAL; 320fe56b9e6SYuval Mintz } 321fe56b9e6SYuval Mintz 322fe56b9e6SYuval Mintz qed_chain_recycle_consumed(p_chain); 323fe56b9e6SYuval Mintz } 324fe56b9e6SYuval Mintz 325fe56b9e6SYuval Mintz qed_eq_prod_update(p_hwfn, qed_chain_get_prod_idx(p_chain)); 326fe56b9e6SYuval Mintz 327fe56b9e6SYuval Mintz return rc; 328fe56b9e6SYuval Mintz } 329fe56b9e6SYuval Mintz 330fe56b9e6SYuval Mintz struct qed_eq *qed_eq_alloc(struct qed_hwfn *p_hwfn, 331fe56b9e6SYuval Mintz u16 num_elem) 332fe56b9e6SYuval Mintz { 333fe56b9e6SYuval Mintz struct qed_eq *p_eq; 334fe56b9e6SYuval Mintz 335fe56b9e6SYuval Mintz /* Allocate EQ struct */ 33660fffb3bSYuval Mintz p_eq = kzalloc(sizeof(*p_eq), GFP_KERNEL); 337fe56b9e6SYuval Mintz if (!p_eq) { 338fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_eq'\n"); 339fe56b9e6SYuval Mintz return NULL; 340fe56b9e6SYuval Mintz } 341fe56b9e6SYuval Mintz 342fe56b9e6SYuval Mintz /* Allocate and initialize EQ chain*/ 343fe56b9e6SYuval Mintz if (qed_chain_alloc(p_hwfn->cdev, 344fe56b9e6SYuval Mintz QED_CHAIN_USE_TO_PRODUCE, 345fe56b9e6SYuval Mintz QED_CHAIN_MODE_PBL, 346fe56b9e6SYuval Mintz num_elem, 347fe56b9e6SYuval Mintz sizeof(union event_ring_element), 348fe56b9e6SYuval Mintz &p_eq->chain)) { 349fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Failed to allocate eq chain\n"); 350fe56b9e6SYuval Mintz goto eq_allocate_fail; 351fe56b9e6SYuval Mintz } 352fe56b9e6SYuval Mintz 353fe56b9e6SYuval Mintz /* register EQ completion on the SP SB */ 354fe56b9e6SYuval Mintz qed_int_register_cb(p_hwfn, 355fe56b9e6SYuval Mintz qed_eq_completion, 356fe56b9e6SYuval Mintz p_eq, 357fe56b9e6SYuval Mintz &p_eq->eq_sb_index, 358fe56b9e6SYuval Mintz &p_eq->p_fw_cons); 359fe56b9e6SYuval Mintz 360fe56b9e6SYuval Mintz return p_eq; 361fe56b9e6SYuval Mintz 362fe56b9e6SYuval Mintz eq_allocate_fail: 363fe56b9e6SYuval Mintz qed_eq_free(p_hwfn, p_eq); 364fe56b9e6SYuval Mintz return NULL; 365fe56b9e6SYuval Mintz } 366fe56b9e6SYuval Mintz 367fe56b9e6SYuval Mintz void qed_eq_setup(struct qed_hwfn *p_hwfn, 368fe56b9e6SYuval Mintz struct qed_eq *p_eq) 369fe56b9e6SYuval Mintz { 370fe56b9e6SYuval Mintz qed_chain_reset(&p_eq->chain); 371fe56b9e6SYuval Mintz } 372fe56b9e6SYuval Mintz 373fe56b9e6SYuval Mintz void qed_eq_free(struct qed_hwfn *p_hwfn, 374fe56b9e6SYuval Mintz struct qed_eq *p_eq) 375fe56b9e6SYuval Mintz { 376fe56b9e6SYuval Mintz if (!p_eq) 377fe56b9e6SYuval Mintz return; 378fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_eq->chain); 379fe56b9e6SYuval Mintz kfree(p_eq); 380fe56b9e6SYuval Mintz } 381fe56b9e6SYuval Mintz 382fe56b9e6SYuval Mintz /*************************************************************************** 383cee4d264SManish Chopra * CQE API - manipulate EQ functionality 384cee4d264SManish Chopra ***************************************************************************/ 385cee4d264SManish Chopra static int qed_cqe_completion( 386cee4d264SManish Chopra struct qed_hwfn *p_hwfn, 387cee4d264SManish Chopra struct eth_slow_path_rx_cqe *cqe, 388cee4d264SManish Chopra enum protocol_type protocol) 389cee4d264SManish Chopra { 390cee4d264SManish Chopra /* @@@tmp - it's possible we'll eventually want to handle some 391cee4d264SManish Chopra * actual commands that can arrive here, but for now this is only 392cee4d264SManish Chopra * used to complete the ramrod using the echo value on the cqe 393cee4d264SManish Chopra */ 394cee4d264SManish Chopra return qed_spq_completion(p_hwfn, cqe->echo, 0, NULL); 395cee4d264SManish Chopra } 396cee4d264SManish Chopra 397cee4d264SManish Chopra int qed_eth_cqe_completion(struct qed_hwfn *p_hwfn, 398cee4d264SManish Chopra struct eth_slow_path_rx_cqe *cqe) 399cee4d264SManish Chopra { 400cee4d264SManish Chopra int rc; 401cee4d264SManish Chopra 402cee4d264SManish Chopra rc = qed_cqe_completion(p_hwfn, cqe, PROTOCOLID_ETH); 403cee4d264SManish Chopra if (rc) 404cee4d264SManish Chopra DP_NOTICE(p_hwfn, 405cee4d264SManish Chopra "Failed to handle RXQ CQE [cmd 0x%02x]\n", 406cee4d264SManish Chopra cqe->ramrod_cmd_id); 407cee4d264SManish Chopra 408cee4d264SManish Chopra return rc; 409cee4d264SManish Chopra } 410cee4d264SManish Chopra 411cee4d264SManish Chopra /*************************************************************************** 412fe56b9e6SYuval Mintz * Slow hwfn Queue (spq) 413fe56b9e6SYuval Mintz ***************************************************************************/ 414fe56b9e6SYuval Mintz void qed_spq_setup(struct qed_hwfn *p_hwfn) 415fe56b9e6SYuval Mintz { 416fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 417fe56b9e6SYuval Mintz struct qed_spq_entry *p_virt = NULL; 418fe56b9e6SYuval Mintz dma_addr_t p_phys = 0; 419fe56b9e6SYuval Mintz unsigned int i = 0; 420fe56b9e6SYuval Mintz 421fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->pending); 422fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->completion_pending); 423fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->free_pool); 424fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->unlimited_pending); 425fe56b9e6SYuval Mintz spin_lock_init(&p_spq->lock); 426fe56b9e6SYuval Mintz 427fe56b9e6SYuval Mintz /* SPQ empty pool */ 428fe56b9e6SYuval Mintz p_phys = p_spq->p_phys + offsetof(struct qed_spq_entry, ramrod); 429fe56b9e6SYuval Mintz p_virt = p_spq->p_virt; 430fe56b9e6SYuval Mintz 431fe56b9e6SYuval Mintz for (i = 0; i < p_spq->chain.capacity; i++) { 43294494598SYuval Mintz DMA_REGPAIR_LE(p_virt->elem.data_ptr, p_phys); 433fe56b9e6SYuval Mintz 434fe56b9e6SYuval Mintz list_add_tail(&p_virt->list, &p_spq->free_pool); 435fe56b9e6SYuval Mintz 436fe56b9e6SYuval Mintz p_virt++; 437fe56b9e6SYuval Mintz p_phys += sizeof(struct qed_spq_entry); 438fe56b9e6SYuval Mintz } 439fe56b9e6SYuval Mintz 440fe56b9e6SYuval Mintz /* Statistics */ 441fe56b9e6SYuval Mintz p_spq->normal_count = 0; 442fe56b9e6SYuval Mintz p_spq->comp_count = 0; 443fe56b9e6SYuval Mintz p_spq->comp_sent_count = 0; 444fe56b9e6SYuval Mintz p_spq->unlimited_pending_count = 0; 44576a9a364STomer Tayar 44676a9a364STomer Tayar bitmap_zero(p_spq->p_comp_bitmap, SPQ_RING_SIZE); 44776a9a364STomer Tayar p_spq->comp_bitmap_idx = 0; 448fe56b9e6SYuval Mintz 449fe56b9e6SYuval Mintz /* SPQ cid, cannot fail */ 450fe56b9e6SYuval Mintz qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_spq->cid); 451fe56b9e6SYuval Mintz qed_spq_hw_initialize(p_hwfn, p_spq); 452fe56b9e6SYuval Mintz 453fe56b9e6SYuval Mintz /* reset the chain itself */ 454fe56b9e6SYuval Mintz qed_chain_reset(&p_spq->chain); 455fe56b9e6SYuval Mintz } 456fe56b9e6SYuval Mintz 457fe56b9e6SYuval Mintz int qed_spq_alloc(struct qed_hwfn *p_hwfn) 458fe56b9e6SYuval Mintz { 459fe56b9e6SYuval Mintz struct qed_spq *p_spq = NULL; 460fe56b9e6SYuval Mintz dma_addr_t p_phys = 0; 461fe56b9e6SYuval Mintz struct qed_spq_entry *p_virt = NULL; 462fe56b9e6SYuval Mintz 463fe56b9e6SYuval Mintz /* SPQ struct */ 464fe56b9e6SYuval Mintz p_spq = 46560fffb3bSYuval Mintz kzalloc(sizeof(struct qed_spq), GFP_KERNEL); 466fe56b9e6SYuval Mintz if (!p_spq) { 467fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_spq'\n"); 468fe56b9e6SYuval Mintz return -ENOMEM; 469fe56b9e6SYuval Mintz } 470fe56b9e6SYuval Mintz 471fe56b9e6SYuval Mintz /* SPQ ring */ 472fe56b9e6SYuval Mintz if (qed_chain_alloc(p_hwfn->cdev, 473fe56b9e6SYuval Mintz QED_CHAIN_USE_TO_PRODUCE, 474fe56b9e6SYuval Mintz QED_CHAIN_MODE_SINGLE, 475fe56b9e6SYuval Mintz 0, /* N/A when the mode is SINGLE */ 476fe56b9e6SYuval Mintz sizeof(struct slow_path_element), 477fe56b9e6SYuval Mintz &p_spq->chain)) { 478fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Failed to allocate spq chain\n"); 479fe56b9e6SYuval Mintz goto spq_allocate_fail; 480fe56b9e6SYuval Mintz } 481fe56b9e6SYuval Mintz 482fe56b9e6SYuval Mintz /* allocate and fill the SPQ elements (incl. ramrod data list) */ 483fe56b9e6SYuval Mintz p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev, 484fe56b9e6SYuval Mintz p_spq->chain.capacity * 485fe56b9e6SYuval Mintz sizeof(struct qed_spq_entry), 486fe56b9e6SYuval Mintz &p_phys, 487fe56b9e6SYuval Mintz GFP_KERNEL); 488fe56b9e6SYuval Mintz 489fe56b9e6SYuval Mintz if (!p_virt) 490fe56b9e6SYuval Mintz goto spq_allocate_fail; 491fe56b9e6SYuval Mintz 492fe56b9e6SYuval Mintz p_spq->p_virt = p_virt; 493fe56b9e6SYuval Mintz p_spq->p_phys = p_phys; 494fe56b9e6SYuval Mintz p_hwfn->p_spq = p_spq; 495fe56b9e6SYuval Mintz 496fe56b9e6SYuval Mintz return 0; 497fe56b9e6SYuval Mintz 498fe56b9e6SYuval Mintz spq_allocate_fail: 499fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_spq->chain); 500fe56b9e6SYuval Mintz kfree(p_spq); 501fe56b9e6SYuval Mintz return -ENOMEM; 502fe56b9e6SYuval Mintz } 503fe56b9e6SYuval Mintz 504fe56b9e6SYuval Mintz void qed_spq_free(struct qed_hwfn *p_hwfn) 505fe56b9e6SYuval Mintz { 506fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 507fe56b9e6SYuval Mintz 508fe56b9e6SYuval Mintz if (!p_spq) 509fe56b9e6SYuval Mintz return; 510fe56b9e6SYuval Mintz 511fe56b9e6SYuval Mintz if (p_spq->p_virt) 512fe56b9e6SYuval Mintz dma_free_coherent(&p_hwfn->cdev->pdev->dev, 513fe56b9e6SYuval Mintz p_spq->chain.capacity * 514fe56b9e6SYuval Mintz sizeof(struct qed_spq_entry), 515fe56b9e6SYuval Mintz p_spq->p_virt, 516fe56b9e6SYuval Mintz p_spq->p_phys); 517fe56b9e6SYuval Mintz 518fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_spq->chain); 519fe56b9e6SYuval Mintz ; 520fe56b9e6SYuval Mintz kfree(p_spq); 521fe56b9e6SYuval Mintz } 522fe56b9e6SYuval Mintz 523fe56b9e6SYuval Mintz int 524fe56b9e6SYuval Mintz qed_spq_get_entry(struct qed_hwfn *p_hwfn, 525fe56b9e6SYuval Mintz struct qed_spq_entry **pp_ent) 526fe56b9e6SYuval Mintz { 527fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 528fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 529fe56b9e6SYuval Mintz int rc = 0; 530fe56b9e6SYuval Mintz 531fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 532fe56b9e6SYuval Mintz 533fe56b9e6SYuval Mintz if (list_empty(&p_spq->free_pool)) { 534fe56b9e6SYuval Mintz p_ent = kzalloc(sizeof(*p_ent), GFP_ATOMIC); 535fe56b9e6SYuval Mintz if (!p_ent) { 536fe56b9e6SYuval Mintz rc = -ENOMEM; 537fe56b9e6SYuval Mintz goto out_unlock; 538fe56b9e6SYuval Mintz } 539fe56b9e6SYuval Mintz p_ent->queue = &p_spq->unlimited_pending; 540fe56b9e6SYuval Mintz } else { 541fe56b9e6SYuval Mintz p_ent = list_first_entry(&p_spq->free_pool, 542fe56b9e6SYuval Mintz struct qed_spq_entry, 543fe56b9e6SYuval Mintz list); 544fe56b9e6SYuval Mintz list_del(&p_ent->list); 545fe56b9e6SYuval Mintz p_ent->queue = &p_spq->pending; 546fe56b9e6SYuval Mintz } 547fe56b9e6SYuval Mintz 548fe56b9e6SYuval Mintz *pp_ent = p_ent; 549fe56b9e6SYuval Mintz 550fe56b9e6SYuval Mintz out_unlock: 551fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 552fe56b9e6SYuval Mintz return rc; 553fe56b9e6SYuval Mintz } 554fe56b9e6SYuval Mintz 555fe56b9e6SYuval Mintz /* Locked variant; Should be called while the SPQ lock is taken */ 556fe56b9e6SYuval Mintz static void __qed_spq_return_entry(struct qed_hwfn *p_hwfn, 557fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent) 558fe56b9e6SYuval Mintz { 559fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_hwfn->p_spq->free_pool); 560fe56b9e6SYuval Mintz } 561fe56b9e6SYuval Mintz 562fe56b9e6SYuval Mintz void qed_spq_return_entry(struct qed_hwfn *p_hwfn, 563fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent) 564fe56b9e6SYuval Mintz { 565fe56b9e6SYuval Mintz spin_lock_bh(&p_hwfn->p_spq->lock); 566fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 567fe56b9e6SYuval Mintz spin_unlock_bh(&p_hwfn->p_spq->lock); 568fe56b9e6SYuval Mintz } 569fe56b9e6SYuval Mintz 570fe56b9e6SYuval Mintz /** 571fe56b9e6SYuval Mintz * @brief qed_spq_add_entry - adds a new entry to the pending 572fe56b9e6SYuval Mintz * list. Should be used while lock is being held. 573fe56b9e6SYuval Mintz * 574fe56b9e6SYuval Mintz * Addes an entry to the pending list is there is room (en empty 575fe56b9e6SYuval Mintz * element is available in the free_pool), or else places the 576fe56b9e6SYuval Mintz * entry in the unlimited_pending pool. 577fe56b9e6SYuval Mintz * 578fe56b9e6SYuval Mintz * @param p_hwfn 579fe56b9e6SYuval Mintz * @param p_ent 580fe56b9e6SYuval Mintz * @param priority 581fe56b9e6SYuval Mintz * 582fe56b9e6SYuval Mintz * @return int 583fe56b9e6SYuval Mintz */ 584fe56b9e6SYuval Mintz static int 585fe56b9e6SYuval Mintz qed_spq_add_entry(struct qed_hwfn *p_hwfn, 586fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent, 587fe56b9e6SYuval Mintz enum spq_priority priority) 588fe56b9e6SYuval Mintz { 589fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 590fe56b9e6SYuval Mintz 591fe56b9e6SYuval Mintz if (p_ent->queue == &p_spq->unlimited_pending) { 592fe56b9e6SYuval Mintz 593fe56b9e6SYuval Mintz if (list_empty(&p_spq->free_pool)) { 594fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->unlimited_pending); 595fe56b9e6SYuval Mintz p_spq->unlimited_pending_count++; 596fe56b9e6SYuval Mintz 597fe56b9e6SYuval Mintz return 0; 59876a9a364STomer Tayar } else { 59976a9a364STomer Tayar struct qed_spq_entry *p_en2; 600fe56b9e6SYuval Mintz 601fe56b9e6SYuval Mintz p_en2 = list_first_entry(&p_spq->free_pool, 602fe56b9e6SYuval Mintz struct qed_spq_entry, 603fe56b9e6SYuval Mintz list); 604fe56b9e6SYuval Mintz list_del(&p_en2->list); 605fe56b9e6SYuval Mintz 60676a9a364STomer Tayar /* Copy the ring element physical pointer to the new 60776a9a364STomer Tayar * entry, since we are about to override the entire ring 60876a9a364STomer Tayar * entry and don't want to lose the pointer. 60976a9a364STomer Tayar */ 61076a9a364STomer Tayar p_ent->elem.data_ptr = p_en2->elem.data_ptr; 61176a9a364STomer Tayar 612fe56b9e6SYuval Mintz *p_en2 = *p_ent; 613fe56b9e6SYuval Mintz 614fe56b9e6SYuval Mintz kfree(p_ent); 615fe56b9e6SYuval Mintz 616fe56b9e6SYuval Mintz p_ent = p_en2; 617fe56b9e6SYuval Mintz } 61876a9a364STomer Tayar } 619fe56b9e6SYuval Mintz 620fe56b9e6SYuval Mintz /* entry is to be placed in 'pending' queue */ 621fe56b9e6SYuval Mintz switch (priority) { 622fe56b9e6SYuval Mintz case QED_SPQ_PRIORITY_NORMAL: 623fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->pending); 624fe56b9e6SYuval Mintz p_spq->normal_count++; 625fe56b9e6SYuval Mintz break; 626fe56b9e6SYuval Mintz case QED_SPQ_PRIORITY_HIGH: 627fe56b9e6SYuval Mintz list_add(&p_ent->list, &p_spq->pending); 628fe56b9e6SYuval Mintz p_spq->high_count++; 629fe56b9e6SYuval Mintz break; 630fe56b9e6SYuval Mintz default: 631fe56b9e6SYuval Mintz return -EINVAL; 632fe56b9e6SYuval Mintz } 633fe56b9e6SYuval Mintz 634fe56b9e6SYuval Mintz return 0; 635fe56b9e6SYuval Mintz } 636fe56b9e6SYuval Mintz 637fe56b9e6SYuval Mintz /*************************************************************************** 638fe56b9e6SYuval Mintz * Accessor 639fe56b9e6SYuval Mintz ***************************************************************************/ 640fe56b9e6SYuval Mintz u32 qed_spq_get_cid(struct qed_hwfn *p_hwfn) 641fe56b9e6SYuval Mintz { 642fe56b9e6SYuval Mintz if (!p_hwfn->p_spq) 643fe56b9e6SYuval Mintz return 0xffffffff; /* illegal */ 644fe56b9e6SYuval Mintz return p_hwfn->p_spq->cid; 645fe56b9e6SYuval Mintz } 646fe56b9e6SYuval Mintz 647fe56b9e6SYuval Mintz /*************************************************************************** 648fe56b9e6SYuval Mintz * Posting new Ramrods 649fe56b9e6SYuval Mintz ***************************************************************************/ 650fe56b9e6SYuval Mintz static int qed_spq_post_list(struct qed_hwfn *p_hwfn, 651fe56b9e6SYuval Mintz struct list_head *head, 652fe56b9e6SYuval Mintz u32 keep_reserve) 653fe56b9e6SYuval Mintz { 654fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 655fe56b9e6SYuval Mintz int rc; 656fe56b9e6SYuval Mintz 657fe56b9e6SYuval Mintz while (qed_chain_get_elem_left(&p_spq->chain) > keep_reserve && 658fe56b9e6SYuval Mintz !list_empty(head)) { 659fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = 660fe56b9e6SYuval Mintz list_first_entry(head, struct qed_spq_entry, list); 661fe56b9e6SYuval Mintz list_del(&p_ent->list); 662fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->completion_pending); 663fe56b9e6SYuval Mintz p_spq->comp_sent_count++; 664fe56b9e6SYuval Mintz 665fe56b9e6SYuval Mintz rc = qed_spq_hw_post(p_hwfn, p_spq, p_ent); 666fe56b9e6SYuval Mintz if (rc) { 667fe56b9e6SYuval Mintz list_del(&p_ent->list); 668fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 669fe56b9e6SYuval Mintz return rc; 670fe56b9e6SYuval Mintz } 671fe56b9e6SYuval Mintz } 672fe56b9e6SYuval Mintz 673fe56b9e6SYuval Mintz return 0; 674fe56b9e6SYuval Mintz } 675fe56b9e6SYuval Mintz 676fe56b9e6SYuval Mintz static int qed_spq_pend_post(struct qed_hwfn *p_hwfn) 677fe56b9e6SYuval Mintz { 678fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 679fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 680fe56b9e6SYuval Mintz 681fe56b9e6SYuval Mintz while (!list_empty(&p_spq->free_pool)) { 682fe56b9e6SYuval Mintz if (list_empty(&p_spq->unlimited_pending)) 683fe56b9e6SYuval Mintz break; 684fe56b9e6SYuval Mintz 685fe56b9e6SYuval Mintz p_ent = list_first_entry(&p_spq->unlimited_pending, 686fe56b9e6SYuval Mintz struct qed_spq_entry, 687fe56b9e6SYuval Mintz list); 688fe56b9e6SYuval Mintz if (!p_ent) 689fe56b9e6SYuval Mintz return -EINVAL; 690fe56b9e6SYuval Mintz 691fe56b9e6SYuval Mintz list_del(&p_ent->list); 692fe56b9e6SYuval Mintz 693fe56b9e6SYuval Mintz qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); 694fe56b9e6SYuval Mintz } 695fe56b9e6SYuval Mintz 696fe56b9e6SYuval Mintz return qed_spq_post_list(p_hwfn, &p_spq->pending, 697fe56b9e6SYuval Mintz SPQ_HIGH_PRI_RESERVE_DEFAULT); 698fe56b9e6SYuval Mintz } 699fe56b9e6SYuval Mintz 700fe56b9e6SYuval Mintz int qed_spq_post(struct qed_hwfn *p_hwfn, 701fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent, 702fe56b9e6SYuval Mintz u8 *fw_return_code) 703fe56b9e6SYuval Mintz { 704fe56b9e6SYuval Mintz int rc = 0; 705fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn ? p_hwfn->p_spq : NULL; 706fe56b9e6SYuval Mintz bool b_ret_ent = true; 707fe56b9e6SYuval Mintz 708fe56b9e6SYuval Mintz if (!p_hwfn) 709fe56b9e6SYuval Mintz return -EINVAL; 710fe56b9e6SYuval Mintz 711fe56b9e6SYuval Mintz if (!p_ent) { 712fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Got a NULL pointer\n"); 713fe56b9e6SYuval Mintz return -EINVAL; 714fe56b9e6SYuval Mintz } 715fe56b9e6SYuval Mintz 716fe56b9e6SYuval Mintz /* Complete the entry */ 717fe56b9e6SYuval Mintz rc = qed_spq_fill_entry(p_hwfn, p_ent); 718fe56b9e6SYuval Mintz 719fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 720fe56b9e6SYuval Mintz 721fe56b9e6SYuval Mintz /* Check return value after LOCK is taken for cleaner error flow */ 722fe56b9e6SYuval Mintz if (rc) 723fe56b9e6SYuval Mintz goto spq_post_fail; 724fe56b9e6SYuval Mintz 725fe56b9e6SYuval Mintz /* Add the request to the pending queue */ 726fe56b9e6SYuval Mintz rc = qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); 727fe56b9e6SYuval Mintz if (rc) 728fe56b9e6SYuval Mintz goto spq_post_fail; 729fe56b9e6SYuval Mintz 730fe56b9e6SYuval Mintz rc = qed_spq_pend_post(p_hwfn); 731fe56b9e6SYuval Mintz if (rc) { 732fe56b9e6SYuval Mintz /* Since it's possible that pending failed for a different 733fe56b9e6SYuval Mintz * entry [although unlikely], the failed entry was already 734fe56b9e6SYuval Mintz * dealt with; No need to return it here. 735fe56b9e6SYuval Mintz */ 736fe56b9e6SYuval Mintz b_ret_ent = false; 737fe56b9e6SYuval Mintz goto spq_post_fail; 738fe56b9e6SYuval Mintz } 739fe56b9e6SYuval Mintz 740fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 741fe56b9e6SYuval Mintz 742fe56b9e6SYuval Mintz if (p_ent->comp_mode == QED_SPQ_MODE_EBLOCK) { 743fe56b9e6SYuval Mintz /* For entries in QED BLOCK mode, the completion code cannot 744fe56b9e6SYuval Mintz * perform the necessary cleanup - if it did, we couldn't 745fe56b9e6SYuval Mintz * access p_ent here to see whether it's successful or not. 746fe56b9e6SYuval Mintz * Thus, after gaining the answer perform the cleanup here. 747fe56b9e6SYuval Mintz */ 748fe56b9e6SYuval Mintz rc = qed_spq_block(p_hwfn, p_ent, fw_return_code); 749fe56b9e6SYuval Mintz if (rc) 750fe56b9e6SYuval Mintz goto spq_post_fail2; 751fe56b9e6SYuval Mintz 752fe56b9e6SYuval Mintz /* return to pool */ 753fe56b9e6SYuval Mintz qed_spq_return_entry(p_hwfn, p_ent); 754fe56b9e6SYuval Mintz } 755fe56b9e6SYuval Mintz return rc; 756fe56b9e6SYuval Mintz 757fe56b9e6SYuval Mintz spq_post_fail2: 758fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 759fe56b9e6SYuval Mintz list_del(&p_ent->list); 760fe56b9e6SYuval Mintz qed_chain_return_produced(&p_spq->chain); 761fe56b9e6SYuval Mintz 762fe56b9e6SYuval Mintz spq_post_fail: 763fe56b9e6SYuval Mintz /* return to the free pool */ 764fe56b9e6SYuval Mintz if (b_ret_ent) 765fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 766fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 767fe56b9e6SYuval Mintz 768fe56b9e6SYuval Mintz return rc; 769fe56b9e6SYuval Mintz } 770fe56b9e6SYuval Mintz 771fe56b9e6SYuval Mintz int qed_spq_completion(struct qed_hwfn *p_hwfn, 772fe56b9e6SYuval Mintz __le16 echo, 773fe56b9e6SYuval Mintz u8 fw_return_code, 774fe56b9e6SYuval Mintz union event_ring_data *p_data) 775fe56b9e6SYuval Mintz { 776fe56b9e6SYuval Mintz struct qed_spq *p_spq; 777fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 778fe56b9e6SYuval Mintz struct qed_spq_entry *tmp; 779fe56b9e6SYuval Mintz struct qed_spq_entry *found = NULL; 780fe56b9e6SYuval Mintz int rc; 781fe56b9e6SYuval Mintz 782fe56b9e6SYuval Mintz if (!p_hwfn) 783fe56b9e6SYuval Mintz return -EINVAL; 784fe56b9e6SYuval Mintz 785fe56b9e6SYuval Mintz p_spq = p_hwfn->p_spq; 786fe56b9e6SYuval Mintz if (!p_spq) 787fe56b9e6SYuval Mintz return -EINVAL; 788fe56b9e6SYuval Mintz 789fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 790fe56b9e6SYuval Mintz list_for_each_entry_safe(p_ent, tmp, &p_spq->completion_pending, 791fe56b9e6SYuval Mintz list) { 792fe56b9e6SYuval Mintz if (p_ent->elem.hdr.echo == echo) { 79376a9a364STomer Tayar u16 pos = le16_to_cpu(echo) % SPQ_RING_SIZE; 79476a9a364STomer Tayar 795fe56b9e6SYuval Mintz list_del(&p_ent->list); 796fe56b9e6SYuval Mintz 79776a9a364STomer Tayar /* Avoid overriding of SPQ entries when getting 79876a9a364STomer Tayar * out-of-order completions, by marking the completions 79976a9a364STomer Tayar * in a bitmap and increasing the chain consumer only 80076a9a364STomer Tayar * for the first successive completed entries. 80176a9a364STomer Tayar */ 80276a9a364STomer Tayar bitmap_set(p_spq->p_comp_bitmap, pos, SPQ_RING_SIZE); 80376a9a364STomer Tayar 80476a9a364STomer Tayar while (test_bit(p_spq->comp_bitmap_idx, 80576a9a364STomer Tayar p_spq->p_comp_bitmap)) { 80676a9a364STomer Tayar bitmap_clear(p_spq->p_comp_bitmap, 80776a9a364STomer Tayar p_spq->comp_bitmap_idx, 80876a9a364STomer Tayar SPQ_RING_SIZE); 80976a9a364STomer Tayar p_spq->comp_bitmap_idx++; 810fe56b9e6SYuval Mintz qed_chain_return_produced(&p_spq->chain); 81176a9a364STomer Tayar } 81276a9a364STomer Tayar 813fe56b9e6SYuval Mintz p_spq->comp_count++; 814fe56b9e6SYuval Mintz found = p_ent; 815fe56b9e6SYuval Mintz break; 816fe56b9e6SYuval Mintz } 81776a9a364STomer Tayar 81876a9a364STomer Tayar /* This is relatively uncommon - depends on scenarios 81976a9a364STomer Tayar * which have mutliple per-PF sent ramrods. 82076a9a364STomer Tayar */ 82176a9a364STomer Tayar DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 82276a9a364STomer Tayar "Got completion for echo %04x - doesn't match echo %04x in completion pending list\n", 82376a9a364STomer Tayar le16_to_cpu(echo), 82476a9a364STomer Tayar le16_to_cpu(p_ent->elem.hdr.echo)); 825fe56b9e6SYuval Mintz } 826fe56b9e6SYuval Mintz 827fe56b9e6SYuval Mintz /* Release lock before callback, as callback may post 828fe56b9e6SYuval Mintz * an additional ramrod. 829fe56b9e6SYuval Mintz */ 830fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 831fe56b9e6SYuval Mintz 832fe56b9e6SYuval Mintz if (!found) { 833fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, 834fe56b9e6SYuval Mintz "Failed to find an entry this EQE completes\n"); 835fe56b9e6SYuval Mintz return -EEXIST; 836fe56b9e6SYuval Mintz } 837fe56b9e6SYuval Mintz 838fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, "Complete: func %p cookie %p)\n", 839fe56b9e6SYuval Mintz p_ent->comp_cb.function, p_ent->comp_cb.cookie); 840fe56b9e6SYuval Mintz if (found->comp_cb.function) 841fe56b9e6SYuval Mintz found->comp_cb.function(p_hwfn, found->comp_cb.cookie, p_data, 842fe56b9e6SYuval Mintz fw_return_code); 843fe56b9e6SYuval Mintz 844fe56b9e6SYuval Mintz if (found->comp_mode != QED_SPQ_MODE_EBLOCK) 845fe56b9e6SYuval Mintz /* EBLOCK is responsible for freeing its own entry */ 846fe56b9e6SYuval Mintz qed_spq_return_entry(p_hwfn, found); 847fe56b9e6SYuval Mintz 848fe56b9e6SYuval Mintz /* Attempt to post pending requests */ 849fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 850fe56b9e6SYuval Mintz rc = qed_spq_pend_post(p_hwfn); 851fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 852fe56b9e6SYuval Mintz 853fe56b9e6SYuval Mintz return rc; 854fe56b9e6SYuval Mintz } 855fe56b9e6SYuval Mintz 856fe56b9e6SYuval Mintz struct qed_consq *qed_consq_alloc(struct qed_hwfn *p_hwfn) 857fe56b9e6SYuval Mintz { 858fe56b9e6SYuval Mintz struct qed_consq *p_consq; 859fe56b9e6SYuval Mintz 860fe56b9e6SYuval Mintz /* Allocate ConsQ struct */ 86160fffb3bSYuval Mintz p_consq = kzalloc(sizeof(*p_consq), GFP_KERNEL); 862fe56b9e6SYuval Mintz if (!p_consq) { 863fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_consq'\n"); 864fe56b9e6SYuval Mintz return NULL; 865fe56b9e6SYuval Mintz } 866fe56b9e6SYuval Mintz 867fe56b9e6SYuval Mintz /* Allocate and initialize EQ chain*/ 868fe56b9e6SYuval Mintz if (qed_chain_alloc(p_hwfn->cdev, 869fe56b9e6SYuval Mintz QED_CHAIN_USE_TO_PRODUCE, 870fe56b9e6SYuval Mintz QED_CHAIN_MODE_PBL, 871fe56b9e6SYuval Mintz QED_CHAIN_PAGE_SIZE / 0x80, 872fe56b9e6SYuval Mintz 0x80, 873fe56b9e6SYuval Mintz &p_consq->chain)) { 874fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Failed to allocate consq chain"); 875fe56b9e6SYuval Mintz goto consq_allocate_fail; 876fe56b9e6SYuval Mintz } 877fe56b9e6SYuval Mintz 878fe56b9e6SYuval Mintz return p_consq; 879fe56b9e6SYuval Mintz 880fe56b9e6SYuval Mintz consq_allocate_fail: 881fe56b9e6SYuval Mintz qed_consq_free(p_hwfn, p_consq); 882fe56b9e6SYuval Mintz return NULL; 883fe56b9e6SYuval Mintz } 884fe56b9e6SYuval Mintz 885fe56b9e6SYuval Mintz void qed_consq_setup(struct qed_hwfn *p_hwfn, 886fe56b9e6SYuval Mintz struct qed_consq *p_consq) 887fe56b9e6SYuval Mintz { 888fe56b9e6SYuval Mintz qed_chain_reset(&p_consq->chain); 889fe56b9e6SYuval Mintz } 890fe56b9e6SYuval Mintz 891fe56b9e6SYuval Mintz void qed_consq_free(struct qed_hwfn *p_hwfn, 892fe56b9e6SYuval Mintz struct qed_consq *p_consq) 893fe56b9e6SYuval Mintz { 894fe56b9e6SYuval Mintz if (!p_consq) 895fe56b9e6SYuval Mintz return; 896fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_consq->chain); 897fe56b9e6SYuval Mintz kfree(p_consq); 898fe56b9e6SYuval Mintz } 899