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" 30fe56b9e6SYuval Mintz 31fe56b9e6SYuval Mintz /*************************************************************************** 32fe56b9e6SYuval Mintz * Structures & Definitions 33fe56b9e6SYuval Mintz ***************************************************************************/ 34fe56b9e6SYuval Mintz 35fe56b9e6SYuval Mintz #define SPQ_HIGH_PRI_RESERVE_DEFAULT (1) 36fe56b9e6SYuval Mintz #define SPQ_BLOCK_SLEEP_LENGTH (1000) 37fe56b9e6SYuval Mintz 38fe56b9e6SYuval Mintz /*************************************************************************** 39fe56b9e6SYuval Mintz * Blocking Imp. (BLOCK/EBLOCK mode) 40fe56b9e6SYuval Mintz ***************************************************************************/ 41fe56b9e6SYuval Mintz static void qed_spq_blocking_cb(struct qed_hwfn *p_hwfn, 42fe56b9e6SYuval Mintz void *cookie, 43fe56b9e6SYuval Mintz union event_ring_data *data, 44fe56b9e6SYuval Mintz u8 fw_return_code) 45fe56b9e6SYuval Mintz { 46fe56b9e6SYuval Mintz struct qed_spq_comp_done *comp_done; 47fe56b9e6SYuval Mintz 48fe56b9e6SYuval Mintz comp_done = (struct qed_spq_comp_done *)cookie; 49fe56b9e6SYuval Mintz 50fe56b9e6SYuval Mintz comp_done->done = 0x1; 51fe56b9e6SYuval Mintz comp_done->fw_return_code = fw_return_code; 52fe56b9e6SYuval Mintz 53fe56b9e6SYuval Mintz /* make update visible to waiting thread */ 54fe56b9e6SYuval Mintz smp_wmb(); 55fe56b9e6SYuval Mintz } 56fe56b9e6SYuval Mintz 57fe56b9e6SYuval Mintz static int qed_spq_block(struct qed_hwfn *p_hwfn, 58fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent, 59fe56b9e6SYuval Mintz u8 *p_fw_ret) 60fe56b9e6SYuval Mintz { 61fe56b9e6SYuval Mintz int sleep_count = SPQ_BLOCK_SLEEP_LENGTH; 62fe56b9e6SYuval Mintz struct qed_spq_comp_done *comp_done; 63fe56b9e6SYuval Mintz int rc; 64fe56b9e6SYuval Mintz 65fe56b9e6SYuval Mintz comp_done = (struct qed_spq_comp_done *)p_ent->comp_cb.cookie; 66fe56b9e6SYuval Mintz while (sleep_count) { 67fe56b9e6SYuval Mintz /* validate we receive completion update */ 68fe56b9e6SYuval Mintz smp_rmb(); 69fe56b9e6SYuval Mintz if (comp_done->done == 1) { 70fe56b9e6SYuval Mintz if (p_fw_ret) 71fe56b9e6SYuval Mintz *p_fw_ret = comp_done->fw_return_code; 72fe56b9e6SYuval Mintz return 0; 73fe56b9e6SYuval Mintz } 74fe56b9e6SYuval Mintz usleep_range(5000, 10000); 75fe56b9e6SYuval Mintz sleep_count--; 76fe56b9e6SYuval Mintz } 77fe56b9e6SYuval Mintz 78fe56b9e6SYuval Mintz DP_INFO(p_hwfn, "Ramrod is stuck, requesting MCP drain\n"); 79fe56b9e6SYuval Mintz rc = qed_mcp_drain(p_hwfn, p_hwfn->p_main_ptt); 80fe56b9e6SYuval Mintz if (rc != 0) 81fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "MCP drain failed\n"); 82fe56b9e6SYuval Mintz 83fe56b9e6SYuval Mintz /* Retry after drain */ 84fe56b9e6SYuval Mintz sleep_count = SPQ_BLOCK_SLEEP_LENGTH; 85fe56b9e6SYuval Mintz while (sleep_count) { 86fe56b9e6SYuval Mintz /* validate we receive completion update */ 87fe56b9e6SYuval Mintz smp_rmb(); 88fe56b9e6SYuval Mintz if (comp_done->done == 1) { 89fe56b9e6SYuval Mintz if (p_fw_ret) 90fe56b9e6SYuval Mintz *p_fw_ret = comp_done->fw_return_code; 91fe56b9e6SYuval Mintz return 0; 92fe56b9e6SYuval Mintz } 93fe56b9e6SYuval Mintz usleep_range(5000, 10000); 94fe56b9e6SYuval Mintz sleep_count--; 95fe56b9e6SYuval Mintz } 96fe56b9e6SYuval Mintz 97fe56b9e6SYuval Mintz if (comp_done->done == 1) { 98fe56b9e6SYuval Mintz if (p_fw_ret) 99fe56b9e6SYuval Mintz *p_fw_ret = comp_done->fw_return_code; 100fe56b9e6SYuval Mintz return 0; 101fe56b9e6SYuval Mintz } 102fe56b9e6SYuval Mintz 103fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Ramrod is stuck, MCP drain failed\n"); 104fe56b9e6SYuval Mintz 105fe56b9e6SYuval Mintz return -EBUSY; 106fe56b9e6SYuval Mintz } 107fe56b9e6SYuval Mintz 108fe56b9e6SYuval Mintz /*************************************************************************** 109fe56b9e6SYuval Mintz * SPQ entries inner API 110fe56b9e6SYuval Mintz ***************************************************************************/ 111fe56b9e6SYuval Mintz static int 112fe56b9e6SYuval Mintz qed_spq_fill_entry(struct qed_hwfn *p_hwfn, 113fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent) 114fe56b9e6SYuval Mintz { 115fe56b9e6SYuval Mintz p_ent->flags = 0; 116fe56b9e6SYuval Mintz 117fe56b9e6SYuval Mintz switch (p_ent->comp_mode) { 118fe56b9e6SYuval Mintz case QED_SPQ_MODE_EBLOCK: 119fe56b9e6SYuval Mintz case QED_SPQ_MODE_BLOCK: 120fe56b9e6SYuval Mintz p_ent->comp_cb.function = qed_spq_blocking_cb; 121fe56b9e6SYuval Mintz break; 122fe56b9e6SYuval Mintz case QED_SPQ_MODE_CB: 123fe56b9e6SYuval Mintz break; 124fe56b9e6SYuval Mintz default: 125fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Unknown SPQE completion mode %d\n", 126fe56b9e6SYuval Mintz p_ent->comp_mode); 127fe56b9e6SYuval Mintz return -EINVAL; 128fe56b9e6SYuval Mintz } 129fe56b9e6SYuval Mintz 130fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 131fe56b9e6SYuval Mintz "Ramrod header: [CID 0x%08x CMD 0x%02x protocol 0x%02x] Data pointer: [%08x:%08x] Completion Mode: %s\n", 132fe56b9e6SYuval Mintz p_ent->elem.hdr.cid, 133fe56b9e6SYuval Mintz p_ent->elem.hdr.cmd_id, 134fe56b9e6SYuval Mintz p_ent->elem.hdr.protocol_id, 135fe56b9e6SYuval Mintz p_ent->elem.data_ptr.hi, 136fe56b9e6SYuval Mintz p_ent->elem.data_ptr.lo, 137fe56b9e6SYuval Mintz D_TRINE(p_ent->comp_mode, QED_SPQ_MODE_EBLOCK, 138fe56b9e6SYuval Mintz QED_SPQ_MODE_BLOCK, "MODE_EBLOCK", "MODE_BLOCK", 139fe56b9e6SYuval Mintz "MODE_CB")); 140fe56b9e6SYuval Mintz 141fe56b9e6SYuval Mintz return 0; 142fe56b9e6SYuval Mintz } 143fe56b9e6SYuval Mintz 144fe56b9e6SYuval Mintz /*************************************************************************** 145fe56b9e6SYuval Mintz * HSI access 146fe56b9e6SYuval Mintz ***************************************************************************/ 147fe56b9e6SYuval Mintz static void qed_spq_hw_initialize(struct qed_hwfn *p_hwfn, 148fe56b9e6SYuval Mintz struct qed_spq *p_spq) 149fe56b9e6SYuval Mintz { 150fe56b9e6SYuval Mintz u16 pq; 151fe56b9e6SYuval Mintz struct qed_cxt_info cxt_info; 152fe56b9e6SYuval Mintz struct core_conn_context *p_cxt; 153fe56b9e6SYuval Mintz union qed_qm_pq_params pq_params; 154fe56b9e6SYuval Mintz int rc; 155fe56b9e6SYuval Mintz 156fe56b9e6SYuval Mintz cxt_info.iid = p_spq->cid; 157fe56b9e6SYuval Mintz 158fe56b9e6SYuval Mintz rc = qed_cxt_get_cid_info(p_hwfn, &cxt_info); 159fe56b9e6SYuval Mintz 160fe56b9e6SYuval Mintz if (rc < 0) { 161fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Cannot find context info for cid=%d\n", 162fe56b9e6SYuval Mintz p_spq->cid); 163fe56b9e6SYuval Mintz return; 164fe56b9e6SYuval Mintz } 165fe56b9e6SYuval Mintz 166fe56b9e6SYuval Mintz p_cxt = cxt_info.p_cxt; 167fe56b9e6SYuval Mintz 168fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags10, 169fe56b9e6SYuval Mintz XSTORM_CORE_CONN_AG_CTX_DQ_CF_EN, 1); 170fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags1, 171fe56b9e6SYuval Mintz XSTORM_CORE_CONN_AG_CTX_DQ_CF_ACTIVE, 1); 172fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags9, 173fe56b9e6SYuval Mintz XSTORM_CORE_CONN_AG_CTX_CONSOLID_PROD_CF_EN, 1); 174fe56b9e6SYuval Mintz 175fe56b9e6SYuval Mintz /* QM physical queue */ 176fe56b9e6SYuval Mintz memset(&pq_params, 0, sizeof(pq_params)); 177fe56b9e6SYuval Mintz pq_params.core.tc = LB_TC; 178fe56b9e6SYuval Mintz pq = qed_get_qm_pq(p_hwfn, PROTOCOLID_CORE, &pq_params); 179fe56b9e6SYuval Mintz p_cxt->xstorm_ag_context.physical_q0 = cpu_to_le16(pq); 180fe56b9e6SYuval Mintz 181fe56b9e6SYuval Mintz p_cxt->xstorm_st_context.spq_base_lo = 182fe56b9e6SYuval Mintz DMA_LO_LE(p_spq->chain.p_phys_addr); 183fe56b9e6SYuval Mintz p_cxt->xstorm_st_context.spq_base_hi = 184fe56b9e6SYuval Mintz DMA_HI_LE(p_spq->chain.p_phys_addr); 185fe56b9e6SYuval Mintz 186fe56b9e6SYuval Mintz p_cxt->xstorm_st_context.consolid_base_addr.lo = 187fe56b9e6SYuval Mintz DMA_LO_LE(p_hwfn->p_consq->chain.p_phys_addr); 188fe56b9e6SYuval Mintz p_cxt->xstorm_st_context.consolid_base_addr.hi = 189fe56b9e6SYuval Mintz DMA_HI_LE(p_hwfn->p_consq->chain.p_phys_addr); 190fe56b9e6SYuval Mintz } 191fe56b9e6SYuval Mintz 192fe56b9e6SYuval Mintz static int qed_spq_hw_post(struct qed_hwfn *p_hwfn, 193fe56b9e6SYuval Mintz struct qed_spq *p_spq, 194fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent) 195fe56b9e6SYuval Mintz { 196fe56b9e6SYuval Mintz struct qed_chain *p_chain = &p_hwfn->p_spq->chain; 19776a9a364STomer Tayar u16 echo = qed_chain_get_prod_idx(p_chain); 198fe56b9e6SYuval Mintz struct slow_path_element *elem; 199fe56b9e6SYuval Mintz struct core_db_data db; 200fe56b9e6SYuval Mintz 20176a9a364STomer Tayar p_ent->elem.hdr.echo = cpu_to_le16(echo); 202fe56b9e6SYuval Mintz elem = qed_chain_produce(p_chain); 203fe56b9e6SYuval Mintz if (!elem) { 204fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Failed to produce from SPQ chain\n"); 205fe56b9e6SYuval Mintz return -EINVAL; 206fe56b9e6SYuval Mintz } 207fe56b9e6SYuval Mintz 208fe56b9e6SYuval Mintz *elem = p_ent->elem; /* struct assignment */ 209fe56b9e6SYuval Mintz 210fe56b9e6SYuval Mintz /* send a doorbell on the slow hwfn session */ 211fe56b9e6SYuval Mintz memset(&db, 0, sizeof(db)); 212fe56b9e6SYuval Mintz SET_FIELD(db.params, CORE_DB_DATA_DEST, DB_DEST_XCM); 213fe56b9e6SYuval Mintz SET_FIELD(db.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET); 214fe56b9e6SYuval Mintz SET_FIELD(db.params, CORE_DB_DATA_AGG_VAL_SEL, 215fe56b9e6SYuval Mintz DQ_XCM_CORE_SPQ_PROD_CMD); 216fe56b9e6SYuval Mintz db.agg_flags = DQ_XCM_CORE_DQ_CF_CMD; 217fe56b9e6SYuval Mintz 218fe56b9e6SYuval Mintz /* validate producer is up to-date */ 219fe56b9e6SYuval Mintz rmb(); 220fe56b9e6SYuval Mintz 221fe56b9e6SYuval Mintz db.spq_prod = cpu_to_le16(qed_chain_get_prod_idx(p_chain)); 222fe56b9e6SYuval Mintz 223fe56b9e6SYuval Mintz /* do not reorder */ 224fe56b9e6SYuval Mintz barrier(); 225fe56b9e6SYuval Mintz 226fe56b9e6SYuval Mintz DOORBELL(p_hwfn, qed_db_addr(p_spq->cid, DQ_DEMS_LEGACY), *(u32 *)&db); 227fe56b9e6SYuval Mintz 228fe56b9e6SYuval Mintz /* make sure doorbell is rang */ 229fe56b9e6SYuval Mintz mmiowb(); 230fe56b9e6SYuval Mintz 231fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 232fe56b9e6SYuval Mintz "Doorbelled [0x%08x, CID 0x%08x] with Flags: %02x agg_params: %02x, prod: %04x\n", 233fe56b9e6SYuval Mintz qed_db_addr(p_spq->cid, DQ_DEMS_LEGACY), 234fe56b9e6SYuval Mintz p_spq->cid, db.params, db.agg_flags, 235fe56b9e6SYuval Mintz qed_chain_get_prod_idx(p_chain)); 236fe56b9e6SYuval Mintz 237fe56b9e6SYuval Mintz return 0; 238fe56b9e6SYuval Mintz } 239fe56b9e6SYuval Mintz 240fe56b9e6SYuval Mintz /*************************************************************************** 241fe56b9e6SYuval Mintz * Asynchronous events 242fe56b9e6SYuval Mintz ***************************************************************************/ 243fe56b9e6SYuval Mintz static int 244fe56b9e6SYuval Mintz qed_async_event_completion(struct qed_hwfn *p_hwfn, 245fe56b9e6SYuval Mintz struct event_ring_entry *p_eqe) 246fe56b9e6SYuval Mintz { 247fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, 248fe56b9e6SYuval Mintz "Unknown Async completion for protocol: %d\n", 249fe56b9e6SYuval Mintz p_eqe->protocol_id); 250fe56b9e6SYuval Mintz return -EINVAL; 251fe56b9e6SYuval Mintz } 252fe56b9e6SYuval Mintz 253fe56b9e6SYuval Mintz /*************************************************************************** 254fe56b9e6SYuval Mintz * EQ API 255fe56b9e6SYuval Mintz ***************************************************************************/ 256fe56b9e6SYuval Mintz void qed_eq_prod_update(struct qed_hwfn *p_hwfn, 257fe56b9e6SYuval Mintz u16 prod) 258fe56b9e6SYuval Mintz { 259fe56b9e6SYuval Mintz u32 addr = GTT_BAR0_MAP_REG_USDM_RAM + 260fe56b9e6SYuval Mintz USTORM_EQE_CONS_OFFSET(p_hwfn->rel_pf_id); 261fe56b9e6SYuval Mintz 262fe56b9e6SYuval Mintz REG_WR16(p_hwfn, addr, prod); 263fe56b9e6SYuval Mintz 264fe56b9e6SYuval Mintz /* keep prod updates ordered */ 265fe56b9e6SYuval Mintz mmiowb(); 266fe56b9e6SYuval Mintz } 267fe56b9e6SYuval Mintz 268fe56b9e6SYuval Mintz int qed_eq_completion(struct qed_hwfn *p_hwfn, 269fe56b9e6SYuval Mintz void *cookie) 270fe56b9e6SYuval Mintz 271fe56b9e6SYuval Mintz { 272fe56b9e6SYuval Mintz struct qed_eq *p_eq = cookie; 273fe56b9e6SYuval Mintz struct qed_chain *p_chain = &p_eq->chain; 274fe56b9e6SYuval Mintz int rc = 0; 275fe56b9e6SYuval Mintz 276fe56b9e6SYuval Mintz /* take a snapshot of the FW consumer */ 277fe56b9e6SYuval Mintz u16 fw_cons_idx = le16_to_cpu(*p_eq->p_fw_cons); 278fe56b9e6SYuval Mintz 279fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, "fw_cons_idx %x\n", fw_cons_idx); 280fe56b9e6SYuval Mintz 281fe56b9e6SYuval Mintz /* Need to guarantee the fw_cons index we use points to a usuable 282fe56b9e6SYuval Mintz * element (to comply with our chain), so our macros would comply 283fe56b9e6SYuval Mintz */ 284fe56b9e6SYuval Mintz if ((fw_cons_idx & qed_chain_get_usable_per_page(p_chain)) == 285fe56b9e6SYuval Mintz qed_chain_get_usable_per_page(p_chain)) 286fe56b9e6SYuval Mintz fw_cons_idx += qed_chain_get_unusable_per_page(p_chain); 287fe56b9e6SYuval Mintz 288fe56b9e6SYuval Mintz /* Complete current segment of eq entries */ 289fe56b9e6SYuval Mintz while (fw_cons_idx != qed_chain_get_cons_idx(p_chain)) { 290fe56b9e6SYuval Mintz struct event_ring_entry *p_eqe = qed_chain_consume(p_chain); 291fe56b9e6SYuval Mintz 292fe56b9e6SYuval Mintz if (!p_eqe) { 293fe56b9e6SYuval Mintz rc = -EINVAL; 294fe56b9e6SYuval Mintz break; 295fe56b9e6SYuval Mintz } 296fe56b9e6SYuval Mintz 297fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 298fe56b9e6SYuval Mintz "op %x prot %x res0 %x echo %x fwret %x flags %x\n", 299fe56b9e6SYuval Mintz p_eqe->opcode, 300fe56b9e6SYuval Mintz p_eqe->protocol_id, 301fe56b9e6SYuval Mintz p_eqe->reserved0, 302fe56b9e6SYuval Mintz le16_to_cpu(p_eqe->echo), 303fe56b9e6SYuval Mintz p_eqe->fw_return_code, 304fe56b9e6SYuval Mintz p_eqe->flags); 305fe56b9e6SYuval Mintz 306fe56b9e6SYuval Mintz if (GET_FIELD(p_eqe->flags, EVENT_RING_ENTRY_ASYNC)) { 307fe56b9e6SYuval Mintz if (qed_async_event_completion(p_hwfn, p_eqe)) 308fe56b9e6SYuval Mintz rc = -EINVAL; 309fe56b9e6SYuval Mintz } else if (qed_spq_completion(p_hwfn, 310fe56b9e6SYuval Mintz p_eqe->echo, 311fe56b9e6SYuval Mintz p_eqe->fw_return_code, 312fe56b9e6SYuval Mintz &p_eqe->data)) { 313fe56b9e6SYuval Mintz rc = -EINVAL; 314fe56b9e6SYuval Mintz } 315fe56b9e6SYuval Mintz 316fe56b9e6SYuval Mintz qed_chain_recycle_consumed(p_chain); 317fe56b9e6SYuval Mintz } 318fe56b9e6SYuval Mintz 319fe56b9e6SYuval Mintz qed_eq_prod_update(p_hwfn, qed_chain_get_prod_idx(p_chain)); 320fe56b9e6SYuval Mintz 321fe56b9e6SYuval Mintz return rc; 322fe56b9e6SYuval Mintz } 323fe56b9e6SYuval Mintz 324fe56b9e6SYuval Mintz struct qed_eq *qed_eq_alloc(struct qed_hwfn *p_hwfn, 325fe56b9e6SYuval Mintz u16 num_elem) 326fe56b9e6SYuval Mintz { 327fe56b9e6SYuval Mintz struct qed_eq *p_eq; 328fe56b9e6SYuval Mintz 329fe56b9e6SYuval Mintz /* Allocate EQ struct */ 33060fffb3bSYuval Mintz p_eq = kzalloc(sizeof(*p_eq), GFP_KERNEL); 331fe56b9e6SYuval Mintz if (!p_eq) { 332fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_eq'\n"); 333fe56b9e6SYuval Mintz return NULL; 334fe56b9e6SYuval Mintz } 335fe56b9e6SYuval Mintz 336fe56b9e6SYuval Mintz /* Allocate and initialize EQ chain*/ 337fe56b9e6SYuval Mintz if (qed_chain_alloc(p_hwfn->cdev, 338fe56b9e6SYuval Mintz QED_CHAIN_USE_TO_PRODUCE, 339fe56b9e6SYuval Mintz QED_CHAIN_MODE_PBL, 340fe56b9e6SYuval Mintz num_elem, 341fe56b9e6SYuval Mintz sizeof(union event_ring_element), 342fe56b9e6SYuval Mintz &p_eq->chain)) { 343fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Failed to allocate eq chain\n"); 344fe56b9e6SYuval Mintz goto eq_allocate_fail; 345fe56b9e6SYuval Mintz } 346fe56b9e6SYuval Mintz 347fe56b9e6SYuval Mintz /* register EQ completion on the SP SB */ 348fe56b9e6SYuval Mintz qed_int_register_cb(p_hwfn, 349fe56b9e6SYuval Mintz qed_eq_completion, 350fe56b9e6SYuval Mintz p_eq, 351fe56b9e6SYuval Mintz &p_eq->eq_sb_index, 352fe56b9e6SYuval Mintz &p_eq->p_fw_cons); 353fe56b9e6SYuval Mintz 354fe56b9e6SYuval Mintz return p_eq; 355fe56b9e6SYuval Mintz 356fe56b9e6SYuval Mintz eq_allocate_fail: 357fe56b9e6SYuval Mintz qed_eq_free(p_hwfn, p_eq); 358fe56b9e6SYuval Mintz return NULL; 359fe56b9e6SYuval Mintz } 360fe56b9e6SYuval Mintz 361fe56b9e6SYuval Mintz void qed_eq_setup(struct qed_hwfn *p_hwfn, 362fe56b9e6SYuval Mintz struct qed_eq *p_eq) 363fe56b9e6SYuval Mintz { 364fe56b9e6SYuval Mintz qed_chain_reset(&p_eq->chain); 365fe56b9e6SYuval Mintz } 366fe56b9e6SYuval Mintz 367fe56b9e6SYuval Mintz void qed_eq_free(struct qed_hwfn *p_hwfn, 368fe56b9e6SYuval Mintz struct qed_eq *p_eq) 369fe56b9e6SYuval Mintz { 370fe56b9e6SYuval Mintz if (!p_eq) 371fe56b9e6SYuval Mintz return; 372fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_eq->chain); 373fe56b9e6SYuval Mintz kfree(p_eq); 374fe56b9e6SYuval Mintz } 375fe56b9e6SYuval Mintz 376fe56b9e6SYuval Mintz /*************************************************************************** 377cee4d264SManish Chopra * CQE API - manipulate EQ functionality 378cee4d264SManish Chopra ***************************************************************************/ 379cee4d264SManish Chopra static int qed_cqe_completion( 380cee4d264SManish Chopra struct qed_hwfn *p_hwfn, 381cee4d264SManish Chopra struct eth_slow_path_rx_cqe *cqe, 382cee4d264SManish Chopra enum protocol_type protocol) 383cee4d264SManish Chopra { 384cee4d264SManish Chopra /* @@@tmp - it's possible we'll eventually want to handle some 385cee4d264SManish Chopra * actual commands that can arrive here, but for now this is only 386cee4d264SManish Chopra * used to complete the ramrod using the echo value on the cqe 387cee4d264SManish Chopra */ 388cee4d264SManish Chopra return qed_spq_completion(p_hwfn, cqe->echo, 0, NULL); 389cee4d264SManish Chopra } 390cee4d264SManish Chopra 391cee4d264SManish Chopra int qed_eth_cqe_completion(struct qed_hwfn *p_hwfn, 392cee4d264SManish Chopra struct eth_slow_path_rx_cqe *cqe) 393cee4d264SManish Chopra { 394cee4d264SManish Chopra int rc; 395cee4d264SManish Chopra 396cee4d264SManish Chopra rc = qed_cqe_completion(p_hwfn, cqe, PROTOCOLID_ETH); 397cee4d264SManish Chopra if (rc) 398cee4d264SManish Chopra DP_NOTICE(p_hwfn, 399cee4d264SManish Chopra "Failed to handle RXQ CQE [cmd 0x%02x]\n", 400cee4d264SManish Chopra cqe->ramrod_cmd_id); 401cee4d264SManish Chopra 402cee4d264SManish Chopra return rc; 403cee4d264SManish Chopra } 404cee4d264SManish Chopra 405cee4d264SManish Chopra /*************************************************************************** 406fe56b9e6SYuval Mintz * Slow hwfn Queue (spq) 407fe56b9e6SYuval Mintz ***************************************************************************/ 408fe56b9e6SYuval Mintz void qed_spq_setup(struct qed_hwfn *p_hwfn) 409fe56b9e6SYuval Mintz { 410fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 411fe56b9e6SYuval Mintz struct qed_spq_entry *p_virt = NULL; 412fe56b9e6SYuval Mintz dma_addr_t p_phys = 0; 413fe56b9e6SYuval Mintz unsigned int i = 0; 414fe56b9e6SYuval Mintz 415fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->pending); 416fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->completion_pending); 417fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->free_pool); 418fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->unlimited_pending); 419fe56b9e6SYuval Mintz spin_lock_init(&p_spq->lock); 420fe56b9e6SYuval Mintz 421fe56b9e6SYuval Mintz /* SPQ empty pool */ 422fe56b9e6SYuval Mintz p_phys = p_spq->p_phys + offsetof(struct qed_spq_entry, ramrod); 423fe56b9e6SYuval Mintz p_virt = p_spq->p_virt; 424fe56b9e6SYuval Mintz 425fe56b9e6SYuval Mintz for (i = 0; i < p_spq->chain.capacity; i++) { 426fe56b9e6SYuval Mintz p_virt->elem.data_ptr.hi = DMA_HI_LE(p_phys); 427fe56b9e6SYuval Mintz p_virt->elem.data_ptr.lo = DMA_LO_LE(p_phys); 428fe56b9e6SYuval Mintz 429fe56b9e6SYuval Mintz list_add_tail(&p_virt->list, &p_spq->free_pool); 430fe56b9e6SYuval Mintz 431fe56b9e6SYuval Mintz p_virt++; 432fe56b9e6SYuval Mintz p_phys += sizeof(struct qed_spq_entry); 433fe56b9e6SYuval Mintz } 434fe56b9e6SYuval Mintz 435fe56b9e6SYuval Mintz /* Statistics */ 436fe56b9e6SYuval Mintz p_spq->normal_count = 0; 437fe56b9e6SYuval Mintz p_spq->comp_count = 0; 438fe56b9e6SYuval Mintz p_spq->comp_sent_count = 0; 439fe56b9e6SYuval Mintz p_spq->unlimited_pending_count = 0; 44076a9a364STomer Tayar 44176a9a364STomer Tayar bitmap_zero(p_spq->p_comp_bitmap, SPQ_RING_SIZE); 44276a9a364STomer Tayar p_spq->comp_bitmap_idx = 0; 443fe56b9e6SYuval Mintz 444fe56b9e6SYuval Mintz /* SPQ cid, cannot fail */ 445fe56b9e6SYuval Mintz qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_spq->cid); 446fe56b9e6SYuval Mintz qed_spq_hw_initialize(p_hwfn, p_spq); 447fe56b9e6SYuval Mintz 448fe56b9e6SYuval Mintz /* reset the chain itself */ 449fe56b9e6SYuval Mintz qed_chain_reset(&p_spq->chain); 450fe56b9e6SYuval Mintz } 451fe56b9e6SYuval Mintz 452fe56b9e6SYuval Mintz int qed_spq_alloc(struct qed_hwfn *p_hwfn) 453fe56b9e6SYuval Mintz { 454fe56b9e6SYuval Mintz struct qed_spq *p_spq = NULL; 455fe56b9e6SYuval Mintz dma_addr_t p_phys = 0; 456fe56b9e6SYuval Mintz struct qed_spq_entry *p_virt = NULL; 457fe56b9e6SYuval Mintz 458fe56b9e6SYuval Mintz /* SPQ struct */ 459fe56b9e6SYuval Mintz p_spq = 46060fffb3bSYuval Mintz kzalloc(sizeof(struct qed_spq), GFP_KERNEL); 461fe56b9e6SYuval Mintz if (!p_spq) { 462fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_spq'\n"); 463fe56b9e6SYuval Mintz return -ENOMEM; 464fe56b9e6SYuval Mintz } 465fe56b9e6SYuval Mintz 466fe56b9e6SYuval Mintz /* SPQ ring */ 467fe56b9e6SYuval Mintz if (qed_chain_alloc(p_hwfn->cdev, 468fe56b9e6SYuval Mintz QED_CHAIN_USE_TO_PRODUCE, 469fe56b9e6SYuval Mintz QED_CHAIN_MODE_SINGLE, 470fe56b9e6SYuval Mintz 0, /* N/A when the mode is SINGLE */ 471fe56b9e6SYuval Mintz sizeof(struct slow_path_element), 472fe56b9e6SYuval Mintz &p_spq->chain)) { 473fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Failed to allocate spq chain\n"); 474fe56b9e6SYuval Mintz goto spq_allocate_fail; 475fe56b9e6SYuval Mintz } 476fe56b9e6SYuval Mintz 477fe56b9e6SYuval Mintz /* allocate and fill the SPQ elements (incl. ramrod data list) */ 478fe56b9e6SYuval Mintz p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev, 479fe56b9e6SYuval Mintz p_spq->chain.capacity * 480fe56b9e6SYuval Mintz sizeof(struct qed_spq_entry), 481fe56b9e6SYuval Mintz &p_phys, 482fe56b9e6SYuval Mintz GFP_KERNEL); 483fe56b9e6SYuval Mintz 484fe56b9e6SYuval Mintz if (!p_virt) 485fe56b9e6SYuval Mintz goto spq_allocate_fail; 486fe56b9e6SYuval Mintz 487fe56b9e6SYuval Mintz p_spq->p_virt = p_virt; 488fe56b9e6SYuval Mintz p_spq->p_phys = p_phys; 489fe56b9e6SYuval Mintz p_hwfn->p_spq = p_spq; 490fe56b9e6SYuval Mintz 491fe56b9e6SYuval Mintz return 0; 492fe56b9e6SYuval Mintz 493fe56b9e6SYuval Mintz spq_allocate_fail: 494fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_spq->chain); 495fe56b9e6SYuval Mintz kfree(p_spq); 496fe56b9e6SYuval Mintz return -ENOMEM; 497fe56b9e6SYuval Mintz } 498fe56b9e6SYuval Mintz 499fe56b9e6SYuval Mintz void qed_spq_free(struct qed_hwfn *p_hwfn) 500fe56b9e6SYuval Mintz { 501fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 502fe56b9e6SYuval Mintz 503fe56b9e6SYuval Mintz if (!p_spq) 504fe56b9e6SYuval Mintz return; 505fe56b9e6SYuval Mintz 506fe56b9e6SYuval Mintz if (p_spq->p_virt) 507fe56b9e6SYuval Mintz dma_free_coherent(&p_hwfn->cdev->pdev->dev, 508fe56b9e6SYuval Mintz p_spq->chain.capacity * 509fe56b9e6SYuval Mintz sizeof(struct qed_spq_entry), 510fe56b9e6SYuval Mintz p_spq->p_virt, 511fe56b9e6SYuval Mintz p_spq->p_phys); 512fe56b9e6SYuval Mintz 513fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_spq->chain); 514fe56b9e6SYuval Mintz ; 515fe56b9e6SYuval Mintz kfree(p_spq); 516fe56b9e6SYuval Mintz } 517fe56b9e6SYuval Mintz 518fe56b9e6SYuval Mintz int 519fe56b9e6SYuval Mintz qed_spq_get_entry(struct qed_hwfn *p_hwfn, 520fe56b9e6SYuval Mintz struct qed_spq_entry **pp_ent) 521fe56b9e6SYuval Mintz { 522fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 523fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 524fe56b9e6SYuval Mintz int rc = 0; 525fe56b9e6SYuval Mintz 526fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 527fe56b9e6SYuval Mintz 528fe56b9e6SYuval Mintz if (list_empty(&p_spq->free_pool)) { 529fe56b9e6SYuval Mintz p_ent = kzalloc(sizeof(*p_ent), GFP_ATOMIC); 530fe56b9e6SYuval Mintz if (!p_ent) { 531fe56b9e6SYuval Mintz rc = -ENOMEM; 532fe56b9e6SYuval Mintz goto out_unlock; 533fe56b9e6SYuval Mintz } 534fe56b9e6SYuval Mintz p_ent->queue = &p_spq->unlimited_pending; 535fe56b9e6SYuval Mintz } else { 536fe56b9e6SYuval Mintz p_ent = list_first_entry(&p_spq->free_pool, 537fe56b9e6SYuval Mintz struct qed_spq_entry, 538fe56b9e6SYuval Mintz list); 539fe56b9e6SYuval Mintz list_del(&p_ent->list); 540fe56b9e6SYuval Mintz p_ent->queue = &p_spq->pending; 541fe56b9e6SYuval Mintz } 542fe56b9e6SYuval Mintz 543fe56b9e6SYuval Mintz *pp_ent = p_ent; 544fe56b9e6SYuval Mintz 545fe56b9e6SYuval Mintz out_unlock: 546fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 547fe56b9e6SYuval Mintz return rc; 548fe56b9e6SYuval Mintz } 549fe56b9e6SYuval Mintz 550fe56b9e6SYuval Mintz /* Locked variant; Should be called while the SPQ lock is taken */ 551fe56b9e6SYuval Mintz static void __qed_spq_return_entry(struct qed_hwfn *p_hwfn, 552fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent) 553fe56b9e6SYuval Mintz { 554fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_hwfn->p_spq->free_pool); 555fe56b9e6SYuval Mintz } 556fe56b9e6SYuval Mintz 557fe56b9e6SYuval Mintz void qed_spq_return_entry(struct qed_hwfn *p_hwfn, 558fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent) 559fe56b9e6SYuval Mintz { 560fe56b9e6SYuval Mintz spin_lock_bh(&p_hwfn->p_spq->lock); 561fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 562fe56b9e6SYuval Mintz spin_unlock_bh(&p_hwfn->p_spq->lock); 563fe56b9e6SYuval Mintz } 564fe56b9e6SYuval Mintz 565fe56b9e6SYuval Mintz /** 566fe56b9e6SYuval Mintz * @brief qed_spq_add_entry - adds a new entry to the pending 567fe56b9e6SYuval Mintz * list. Should be used while lock is being held. 568fe56b9e6SYuval Mintz * 569fe56b9e6SYuval Mintz * Addes an entry to the pending list is there is room (en empty 570fe56b9e6SYuval Mintz * element is available in the free_pool), or else places the 571fe56b9e6SYuval Mintz * entry in the unlimited_pending pool. 572fe56b9e6SYuval Mintz * 573fe56b9e6SYuval Mintz * @param p_hwfn 574fe56b9e6SYuval Mintz * @param p_ent 575fe56b9e6SYuval Mintz * @param priority 576fe56b9e6SYuval Mintz * 577fe56b9e6SYuval Mintz * @return int 578fe56b9e6SYuval Mintz */ 579fe56b9e6SYuval Mintz static int 580fe56b9e6SYuval Mintz qed_spq_add_entry(struct qed_hwfn *p_hwfn, 581fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent, 582fe56b9e6SYuval Mintz enum spq_priority priority) 583fe56b9e6SYuval Mintz { 584fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 585fe56b9e6SYuval Mintz 586fe56b9e6SYuval Mintz if (p_ent->queue == &p_spq->unlimited_pending) { 587fe56b9e6SYuval Mintz 588fe56b9e6SYuval Mintz if (list_empty(&p_spq->free_pool)) { 589fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->unlimited_pending); 590fe56b9e6SYuval Mintz p_spq->unlimited_pending_count++; 591fe56b9e6SYuval Mintz 592fe56b9e6SYuval Mintz return 0; 59376a9a364STomer Tayar } else { 59476a9a364STomer Tayar struct qed_spq_entry *p_en2; 595fe56b9e6SYuval Mintz 596fe56b9e6SYuval Mintz p_en2 = list_first_entry(&p_spq->free_pool, 597fe56b9e6SYuval Mintz struct qed_spq_entry, 598fe56b9e6SYuval Mintz list); 599fe56b9e6SYuval Mintz list_del(&p_en2->list); 600fe56b9e6SYuval Mintz 60176a9a364STomer Tayar /* Copy the ring element physical pointer to the new 60276a9a364STomer Tayar * entry, since we are about to override the entire ring 60376a9a364STomer Tayar * entry and don't want to lose the pointer. 60476a9a364STomer Tayar */ 60576a9a364STomer Tayar p_ent->elem.data_ptr = p_en2->elem.data_ptr; 60676a9a364STomer Tayar 607fe56b9e6SYuval Mintz *p_en2 = *p_ent; 608fe56b9e6SYuval Mintz 609fe56b9e6SYuval Mintz kfree(p_ent); 610fe56b9e6SYuval Mintz 611fe56b9e6SYuval Mintz p_ent = p_en2; 612fe56b9e6SYuval Mintz } 61376a9a364STomer Tayar } 614fe56b9e6SYuval Mintz 615fe56b9e6SYuval Mintz /* entry is to be placed in 'pending' queue */ 616fe56b9e6SYuval Mintz switch (priority) { 617fe56b9e6SYuval Mintz case QED_SPQ_PRIORITY_NORMAL: 618fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->pending); 619fe56b9e6SYuval Mintz p_spq->normal_count++; 620fe56b9e6SYuval Mintz break; 621fe56b9e6SYuval Mintz case QED_SPQ_PRIORITY_HIGH: 622fe56b9e6SYuval Mintz list_add(&p_ent->list, &p_spq->pending); 623fe56b9e6SYuval Mintz p_spq->high_count++; 624fe56b9e6SYuval Mintz break; 625fe56b9e6SYuval Mintz default: 626fe56b9e6SYuval Mintz return -EINVAL; 627fe56b9e6SYuval Mintz } 628fe56b9e6SYuval Mintz 629fe56b9e6SYuval Mintz return 0; 630fe56b9e6SYuval Mintz } 631fe56b9e6SYuval Mintz 632fe56b9e6SYuval Mintz /*************************************************************************** 633fe56b9e6SYuval Mintz * Accessor 634fe56b9e6SYuval Mintz ***************************************************************************/ 635fe56b9e6SYuval Mintz u32 qed_spq_get_cid(struct qed_hwfn *p_hwfn) 636fe56b9e6SYuval Mintz { 637fe56b9e6SYuval Mintz if (!p_hwfn->p_spq) 638fe56b9e6SYuval Mintz return 0xffffffff; /* illegal */ 639fe56b9e6SYuval Mintz return p_hwfn->p_spq->cid; 640fe56b9e6SYuval Mintz } 641fe56b9e6SYuval Mintz 642fe56b9e6SYuval Mintz /*************************************************************************** 643fe56b9e6SYuval Mintz * Posting new Ramrods 644fe56b9e6SYuval Mintz ***************************************************************************/ 645fe56b9e6SYuval Mintz static int qed_spq_post_list(struct qed_hwfn *p_hwfn, 646fe56b9e6SYuval Mintz struct list_head *head, 647fe56b9e6SYuval Mintz u32 keep_reserve) 648fe56b9e6SYuval Mintz { 649fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 650fe56b9e6SYuval Mintz int rc; 651fe56b9e6SYuval Mintz 652fe56b9e6SYuval Mintz while (qed_chain_get_elem_left(&p_spq->chain) > keep_reserve && 653fe56b9e6SYuval Mintz !list_empty(head)) { 654fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = 655fe56b9e6SYuval Mintz list_first_entry(head, struct qed_spq_entry, list); 656fe56b9e6SYuval Mintz list_del(&p_ent->list); 657fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->completion_pending); 658fe56b9e6SYuval Mintz p_spq->comp_sent_count++; 659fe56b9e6SYuval Mintz 660fe56b9e6SYuval Mintz rc = qed_spq_hw_post(p_hwfn, p_spq, p_ent); 661fe56b9e6SYuval Mintz if (rc) { 662fe56b9e6SYuval Mintz list_del(&p_ent->list); 663fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 664fe56b9e6SYuval Mintz return rc; 665fe56b9e6SYuval Mintz } 666fe56b9e6SYuval Mintz } 667fe56b9e6SYuval Mintz 668fe56b9e6SYuval Mintz return 0; 669fe56b9e6SYuval Mintz } 670fe56b9e6SYuval Mintz 671fe56b9e6SYuval Mintz static int qed_spq_pend_post(struct qed_hwfn *p_hwfn) 672fe56b9e6SYuval Mintz { 673fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 674fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 675fe56b9e6SYuval Mintz 676fe56b9e6SYuval Mintz while (!list_empty(&p_spq->free_pool)) { 677fe56b9e6SYuval Mintz if (list_empty(&p_spq->unlimited_pending)) 678fe56b9e6SYuval Mintz break; 679fe56b9e6SYuval Mintz 680fe56b9e6SYuval Mintz p_ent = list_first_entry(&p_spq->unlimited_pending, 681fe56b9e6SYuval Mintz struct qed_spq_entry, 682fe56b9e6SYuval Mintz list); 683fe56b9e6SYuval Mintz if (!p_ent) 684fe56b9e6SYuval Mintz return -EINVAL; 685fe56b9e6SYuval Mintz 686fe56b9e6SYuval Mintz list_del(&p_ent->list); 687fe56b9e6SYuval Mintz 688fe56b9e6SYuval Mintz qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); 689fe56b9e6SYuval Mintz } 690fe56b9e6SYuval Mintz 691fe56b9e6SYuval Mintz return qed_spq_post_list(p_hwfn, &p_spq->pending, 692fe56b9e6SYuval Mintz SPQ_HIGH_PRI_RESERVE_DEFAULT); 693fe56b9e6SYuval Mintz } 694fe56b9e6SYuval Mintz 695fe56b9e6SYuval Mintz int qed_spq_post(struct qed_hwfn *p_hwfn, 696fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent, 697fe56b9e6SYuval Mintz u8 *fw_return_code) 698fe56b9e6SYuval Mintz { 699fe56b9e6SYuval Mintz int rc = 0; 700fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn ? p_hwfn->p_spq : NULL; 701fe56b9e6SYuval Mintz bool b_ret_ent = true; 702fe56b9e6SYuval Mintz 703fe56b9e6SYuval Mintz if (!p_hwfn) 704fe56b9e6SYuval Mintz return -EINVAL; 705fe56b9e6SYuval Mintz 706fe56b9e6SYuval Mintz if (!p_ent) { 707fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Got a NULL pointer\n"); 708fe56b9e6SYuval Mintz return -EINVAL; 709fe56b9e6SYuval Mintz } 710fe56b9e6SYuval Mintz 711fe56b9e6SYuval Mintz /* Complete the entry */ 712fe56b9e6SYuval Mintz rc = qed_spq_fill_entry(p_hwfn, p_ent); 713fe56b9e6SYuval Mintz 714fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 715fe56b9e6SYuval Mintz 716fe56b9e6SYuval Mintz /* Check return value after LOCK is taken for cleaner error flow */ 717fe56b9e6SYuval Mintz if (rc) 718fe56b9e6SYuval Mintz goto spq_post_fail; 719fe56b9e6SYuval Mintz 720fe56b9e6SYuval Mintz /* Add the request to the pending queue */ 721fe56b9e6SYuval Mintz rc = qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); 722fe56b9e6SYuval Mintz if (rc) 723fe56b9e6SYuval Mintz goto spq_post_fail; 724fe56b9e6SYuval Mintz 725fe56b9e6SYuval Mintz rc = qed_spq_pend_post(p_hwfn); 726fe56b9e6SYuval Mintz if (rc) { 727fe56b9e6SYuval Mintz /* Since it's possible that pending failed for a different 728fe56b9e6SYuval Mintz * entry [although unlikely], the failed entry was already 729fe56b9e6SYuval Mintz * dealt with; No need to return it here. 730fe56b9e6SYuval Mintz */ 731fe56b9e6SYuval Mintz b_ret_ent = false; 732fe56b9e6SYuval Mintz goto spq_post_fail; 733fe56b9e6SYuval Mintz } 734fe56b9e6SYuval Mintz 735fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 736fe56b9e6SYuval Mintz 737fe56b9e6SYuval Mintz if (p_ent->comp_mode == QED_SPQ_MODE_EBLOCK) { 738fe56b9e6SYuval Mintz /* For entries in QED BLOCK mode, the completion code cannot 739fe56b9e6SYuval Mintz * perform the necessary cleanup - if it did, we couldn't 740fe56b9e6SYuval Mintz * access p_ent here to see whether it's successful or not. 741fe56b9e6SYuval Mintz * Thus, after gaining the answer perform the cleanup here. 742fe56b9e6SYuval Mintz */ 743fe56b9e6SYuval Mintz rc = qed_spq_block(p_hwfn, p_ent, fw_return_code); 744fe56b9e6SYuval Mintz if (rc) 745fe56b9e6SYuval Mintz goto spq_post_fail2; 746fe56b9e6SYuval Mintz 747fe56b9e6SYuval Mintz /* return to pool */ 748fe56b9e6SYuval Mintz qed_spq_return_entry(p_hwfn, p_ent); 749fe56b9e6SYuval Mintz } 750fe56b9e6SYuval Mintz return rc; 751fe56b9e6SYuval Mintz 752fe56b9e6SYuval Mintz spq_post_fail2: 753fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 754fe56b9e6SYuval Mintz list_del(&p_ent->list); 755fe56b9e6SYuval Mintz qed_chain_return_produced(&p_spq->chain); 756fe56b9e6SYuval Mintz 757fe56b9e6SYuval Mintz spq_post_fail: 758fe56b9e6SYuval Mintz /* return to the free pool */ 759fe56b9e6SYuval Mintz if (b_ret_ent) 760fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 761fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 762fe56b9e6SYuval Mintz 763fe56b9e6SYuval Mintz return rc; 764fe56b9e6SYuval Mintz } 765fe56b9e6SYuval Mintz 766fe56b9e6SYuval Mintz int qed_spq_completion(struct qed_hwfn *p_hwfn, 767fe56b9e6SYuval Mintz __le16 echo, 768fe56b9e6SYuval Mintz u8 fw_return_code, 769fe56b9e6SYuval Mintz union event_ring_data *p_data) 770fe56b9e6SYuval Mintz { 771fe56b9e6SYuval Mintz struct qed_spq *p_spq; 772fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 773fe56b9e6SYuval Mintz struct qed_spq_entry *tmp; 774fe56b9e6SYuval Mintz struct qed_spq_entry *found = NULL; 775fe56b9e6SYuval Mintz int rc; 776fe56b9e6SYuval Mintz 777fe56b9e6SYuval Mintz if (!p_hwfn) 778fe56b9e6SYuval Mintz return -EINVAL; 779fe56b9e6SYuval Mintz 780fe56b9e6SYuval Mintz p_spq = p_hwfn->p_spq; 781fe56b9e6SYuval Mintz if (!p_spq) 782fe56b9e6SYuval Mintz return -EINVAL; 783fe56b9e6SYuval Mintz 784fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 785fe56b9e6SYuval Mintz list_for_each_entry_safe(p_ent, tmp, &p_spq->completion_pending, 786fe56b9e6SYuval Mintz list) { 787fe56b9e6SYuval Mintz if (p_ent->elem.hdr.echo == echo) { 78876a9a364STomer Tayar u16 pos = le16_to_cpu(echo) % SPQ_RING_SIZE; 78976a9a364STomer Tayar 790fe56b9e6SYuval Mintz list_del(&p_ent->list); 791fe56b9e6SYuval Mintz 79276a9a364STomer Tayar /* Avoid overriding of SPQ entries when getting 79376a9a364STomer Tayar * out-of-order completions, by marking the completions 79476a9a364STomer Tayar * in a bitmap and increasing the chain consumer only 79576a9a364STomer Tayar * for the first successive completed entries. 79676a9a364STomer Tayar */ 79776a9a364STomer Tayar bitmap_set(p_spq->p_comp_bitmap, pos, SPQ_RING_SIZE); 79876a9a364STomer Tayar 79976a9a364STomer Tayar while (test_bit(p_spq->comp_bitmap_idx, 80076a9a364STomer Tayar p_spq->p_comp_bitmap)) { 80176a9a364STomer Tayar bitmap_clear(p_spq->p_comp_bitmap, 80276a9a364STomer Tayar p_spq->comp_bitmap_idx, 80376a9a364STomer Tayar SPQ_RING_SIZE); 80476a9a364STomer Tayar p_spq->comp_bitmap_idx++; 805fe56b9e6SYuval Mintz qed_chain_return_produced(&p_spq->chain); 80676a9a364STomer Tayar } 80776a9a364STomer Tayar 808fe56b9e6SYuval Mintz p_spq->comp_count++; 809fe56b9e6SYuval Mintz found = p_ent; 810fe56b9e6SYuval Mintz break; 811fe56b9e6SYuval Mintz } 81276a9a364STomer Tayar 81376a9a364STomer Tayar /* This is relatively uncommon - depends on scenarios 81476a9a364STomer Tayar * which have mutliple per-PF sent ramrods. 81576a9a364STomer Tayar */ 81676a9a364STomer Tayar DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 81776a9a364STomer Tayar "Got completion for echo %04x - doesn't match echo %04x in completion pending list\n", 81876a9a364STomer Tayar le16_to_cpu(echo), 81976a9a364STomer Tayar le16_to_cpu(p_ent->elem.hdr.echo)); 820fe56b9e6SYuval Mintz } 821fe56b9e6SYuval Mintz 822fe56b9e6SYuval Mintz /* Release lock before callback, as callback may post 823fe56b9e6SYuval Mintz * an additional ramrod. 824fe56b9e6SYuval Mintz */ 825fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 826fe56b9e6SYuval Mintz 827fe56b9e6SYuval Mintz if (!found) { 828fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, 829fe56b9e6SYuval Mintz "Failed to find an entry this EQE completes\n"); 830fe56b9e6SYuval Mintz return -EEXIST; 831fe56b9e6SYuval Mintz } 832fe56b9e6SYuval Mintz 833fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, "Complete: func %p cookie %p)\n", 834fe56b9e6SYuval Mintz p_ent->comp_cb.function, p_ent->comp_cb.cookie); 835fe56b9e6SYuval Mintz if (found->comp_cb.function) 836fe56b9e6SYuval Mintz found->comp_cb.function(p_hwfn, found->comp_cb.cookie, p_data, 837fe56b9e6SYuval Mintz fw_return_code); 838fe56b9e6SYuval Mintz 839fe56b9e6SYuval Mintz if (found->comp_mode != QED_SPQ_MODE_EBLOCK) 840fe56b9e6SYuval Mintz /* EBLOCK is responsible for freeing its own entry */ 841fe56b9e6SYuval Mintz qed_spq_return_entry(p_hwfn, found); 842fe56b9e6SYuval Mintz 843fe56b9e6SYuval Mintz /* Attempt to post pending requests */ 844fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 845fe56b9e6SYuval Mintz rc = qed_spq_pend_post(p_hwfn); 846fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 847fe56b9e6SYuval Mintz 848fe56b9e6SYuval Mintz return rc; 849fe56b9e6SYuval Mintz } 850fe56b9e6SYuval Mintz 851fe56b9e6SYuval Mintz struct qed_consq *qed_consq_alloc(struct qed_hwfn *p_hwfn) 852fe56b9e6SYuval Mintz { 853fe56b9e6SYuval Mintz struct qed_consq *p_consq; 854fe56b9e6SYuval Mintz 855fe56b9e6SYuval Mintz /* Allocate ConsQ struct */ 85660fffb3bSYuval Mintz p_consq = kzalloc(sizeof(*p_consq), GFP_KERNEL); 857fe56b9e6SYuval Mintz if (!p_consq) { 858fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_consq'\n"); 859fe56b9e6SYuval Mintz return NULL; 860fe56b9e6SYuval Mintz } 861fe56b9e6SYuval Mintz 862fe56b9e6SYuval Mintz /* Allocate and initialize EQ chain*/ 863fe56b9e6SYuval Mintz if (qed_chain_alloc(p_hwfn->cdev, 864fe56b9e6SYuval Mintz QED_CHAIN_USE_TO_PRODUCE, 865fe56b9e6SYuval Mintz QED_CHAIN_MODE_PBL, 866fe56b9e6SYuval Mintz QED_CHAIN_PAGE_SIZE / 0x80, 867fe56b9e6SYuval Mintz 0x80, 868fe56b9e6SYuval Mintz &p_consq->chain)) { 869fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Failed to allocate consq chain"); 870fe56b9e6SYuval Mintz goto consq_allocate_fail; 871fe56b9e6SYuval Mintz } 872fe56b9e6SYuval Mintz 873fe56b9e6SYuval Mintz return p_consq; 874fe56b9e6SYuval Mintz 875fe56b9e6SYuval Mintz consq_allocate_fail: 876fe56b9e6SYuval Mintz qed_consq_free(p_hwfn, p_consq); 877fe56b9e6SYuval Mintz return NULL; 878fe56b9e6SYuval Mintz } 879fe56b9e6SYuval Mintz 880fe56b9e6SYuval Mintz void qed_consq_setup(struct qed_hwfn *p_hwfn, 881fe56b9e6SYuval Mintz struct qed_consq *p_consq) 882fe56b9e6SYuval Mintz { 883fe56b9e6SYuval Mintz qed_chain_reset(&p_consq->chain); 884fe56b9e6SYuval Mintz } 885fe56b9e6SYuval Mintz 886fe56b9e6SYuval Mintz void qed_consq_free(struct qed_hwfn *p_hwfn, 887fe56b9e6SYuval Mintz struct qed_consq *p_consq) 888fe56b9e6SYuval Mintz { 889fe56b9e6SYuval Mintz if (!p_consq) 890fe56b9e6SYuval Mintz return; 891fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_consq->chain); 892fe56b9e6SYuval Mintz kfree(p_consq); 893fe56b9e6SYuval Mintz } 894