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, 441a635e48SYuval Mintz union event_ring_data *data, 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 ***************************************************************************/ 1111a635e48SYuval Mintz static int qed_spq_fill_entry(struct qed_hwfn *p_hwfn, 112fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent) 113fe56b9e6SYuval Mintz { 114fe56b9e6SYuval Mintz p_ent->flags = 0; 115fe56b9e6SYuval Mintz 116fe56b9e6SYuval Mintz switch (p_ent->comp_mode) { 117fe56b9e6SYuval Mintz case QED_SPQ_MODE_EBLOCK: 118fe56b9e6SYuval Mintz case QED_SPQ_MODE_BLOCK: 119fe56b9e6SYuval Mintz p_ent->comp_cb.function = qed_spq_blocking_cb; 120fe56b9e6SYuval Mintz break; 121fe56b9e6SYuval Mintz case QED_SPQ_MODE_CB: 122fe56b9e6SYuval Mintz break; 123fe56b9e6SYuval Mintz default: 124fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Unknown SPQE completion mode %d\n", 125fe56b9e6SYuval Mintz p_ent->comp_mode); 126fe56b9e6SYuval Mintz return -EINVAL; 127fe56b9e6SYuval Mintz } 128fe56b9e6SYuval Mintz 129fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 130fe56b9e6SYuval Mintz "Ramrod header: [CID 0x%08x CMD 0x%02x protocol 0x%02x] Data pointer: [%08x:%08x] Completion Mode: %s\n", 131fe56b9e6SYuval Mintz p_ent->elem.hdr.cid, 132fe56b9e6SYuval Mintz p_ent->elem.hdr.cmd_id, 133fe56b9e6SYuval Mintz p_ent->elem.hdr.protocol_id, 134fe56b9e6SYuval Mintz p_ent->elem.data_ptr.hi, 135fe56b9e6SYuval Mintz p_ent->elem.data_ptr.lo, 136fe56b9e6SYuval Mintz D_TRINE(p_ent->comp_mode, QED_SPQ_MODE_EBLOCK, 137fe56b9e6SYuval Mintz QED_SPQ_MODE_BLOCK, "MODE_EBLOCK", "MODE_BLOCK", 138fe56b9e6SYuval Mintz "MODE_CB")); 139fe56b9e6SYuval Mintz 140fe56b9e6SYuval Mintz return 0; 141fe56b9e6SYuval Mintz } 142fe56b9e6SYuval Mintz 143fe56b9e6SYuval Mintz /*************************************************************************** 144fe56b9e6SYuval Mintz * HSI access 145fe56b9e6SYuval Mintz ***************************************************************************/ 146fe56b9e6SYuval Mintz static void qed_spq_hw_initialize(struct qed_hwfn *p_hwfn, 147fe56b9e6SYuval Mintz struct qed_spq *p_spq) 148fe56b9e6SYuval Mintz { 149fe56b9e6SYuval Mintz u16 pq; 150fe56b9e6SYuval Mintz struct qed_cxt_info cxt_info; 151fe56b9e6SYuval Mintz struct core_conn_context *p_cxt; 152fe56b9e6SYuval Mintz union qed_qm_pq_params pq_params; 153fe56b9e6SYuval Mintz int rc; 154fe56b9e6SYuval Mintz 155fe56b9e6SYuval Mintz cxt_info.iid = p_spq->cid; 156fe56b9e6SYuval Mintz 157fe56b9e6SYuval Mintz rc = qed_cxt_get_cid_info(p_hwfn, &cxt_info); 158fe56b9e6SYuval Mintz 159fe56b9e6SYuval Mintz if (rc < 0) { 160fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Cannot find context info for cid=%d\n", 161fe56b9e6SYuval Mintz p_spq->cid); 162fe56b9e6SYuval Mintz return; 163fe56b9e6SYuval Mintz } 164fe56b9e6SYuval Mintz 165fe56b9e6SYuval Mintz p_cxt = cxt_info.p_cxt; 166fe56b9e6SYuval Mintz 167fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags10, 168fe56b9e6SYuval Mintz XSTORM_CORE_CONN_AG_CTX_DQ_CF_EN, 1); 169fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags1, 170fe56b9e6SYuval Mintz XSTORM_CORE_CONN_AG_CTX_DQ_CF_ACTIVE, 1); 171fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags9, 172fe56b9e6SYuval Mintz XSTORM_CORE_CONN_AG_CTX_CONSOLID_PROD_CF_EN, 1); 173fe56b9e6SYuval Mintz 174fe56b9e6SYuval Mintz /* QM physical queue */ 175fe56b9e6SYuval Mintz memset(&pq_params, 0, sizeof(pq_params)); 176fe56b9e6SYuval Mintz pq_params.core.tc = LB_TC; 177fe56b9e6SYuval Mintz pq = qed_get_qm_pq(p_hwfn, PROTOCOLID_CORE, &pq_params); 178fe56b9e6SYuval Mintz p_cxt->xstorm_ag_context.physical_q0 = cpu_to_le16(pq); 179fe56b9e6SYuval Mintz 180fe56b9e6SYuval Mintz p_cxt->xstorm_st_context.spq_base_lo = 181fe56b9e6SYuval Mintz DMA_LO_LE(p_spq->chain.p_phys_addr); 182fe56b9e6SYuval Mintz p_cxt->xstorm_st_context.spq_base_hi = 183fe56b9e6SYuval Mintz DMA_HI_LE(p_spq->chain.p_phys_addr); 184fe56b9e6SYuval Mintz 18594494598SYuval Mintz DMA_REGPAIR_LE(p_cxt->xstorm_st_context.consolid_base_addr, 18694494598SYuval Mintz p_hwfn->p_consq->chain.p_phys_addr); 187fe56b9e6SYuval Mintz } 188fe56b9e6SYuval Mintz 189fe56b9e6SYuval Mintz static int qed_spq_hw_post(struct qed_hwfn *p_hwfn, 1901a635e48SYuval Mintz struct qed_spq *p_spq, struct qed_spq_entry *p_ent) 191fe56b9e6SYuval Mintz { 192fe56b9e6SYuval Mintz struct qed_chain *p_chain = &p_hwfn->p_spq->chain; 19376a9a364STomer Tayar u16 echo = qed_chain_get_prod_idx(p_chain); 194fe56b9e6SYuval Mintz struct slow_path_element *elem; 195fe56b9e6SYuval Mintz struct core_db_data db; 196fe56b9e6SYuval Mintz 19776a9a364STomer Tayar p_ent->elem.hdr.echo = cpu_to_le16(echo); 198fe56b9e6SYuval Mintz elem = qed_chain_produce(p_chain); 199fe56b9e6SYuval Mintz if (!elem) { 200fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Failed to produce from SPQ chain\n"); 201fe56b9e6SYuval Mintz return -EINVAL; 202fe56b9e6SYuval Mintz } 203fe56b9e6SYuval Mintz 204fe56b9e6SYuval Mintz *elem = p_ent->elem; /* struct assignment */ 205fe56b9e6SYuval Mintz 206fe56b9e6SYuval Mintz /* send a doorbell on the slow hwfn session */ 207fe56b9e6SYuval Mintz memset(&db, 0, sizeof(db)); 208fe56b9e6SYuval Mintz SET_FIELD(db.params, CORE_DB_DATA_DEST, DB_DEST_XCM); 209fe56b9e6SYuval Mintz SET_FIELD(db.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET); 210fe56b9e6SYuval Mintz SET_FIELD(db.params, CORE_DB_DATA_AGG_VAL_SEL, 211fe56b9e6SYuval Mintz DQ_XCM_CORE_SPQ_PROD_CMD); 212fe56b9e6SYuval Mintz db.agg_flags = DQ_XCM_CORE_DQ_CF_CMD; 213fe56b9e6SYuval Mintz db.spq_prod = cpu_to_le16(qed_chain_get_prod_idx(p_chain)); 214fe56b9e6SYuval Mintz 21534c7bb47SSudarsana Reddy Kalluru /* make sure the SPQE is updated before the doorbell */ 21634c7bb47SSudarsana Reddy Kalluru wmb(); 217fe56b9e6SYuval Mintz 218fe56b9e6SYuval Mintz DOORBELL(p_hwfn, qed_db_addr(p_spq->cid, DQ_DEMS_LEGACY), *(u32 *)&db); 219fe56b9e6SYuval Mintz 220fe56b9e6SYuval Mintz /* make sure doorbell is rang */ 22134c7bb47SSudarsana Reddy Kalluru wmb(); 222fe56b9e6SYuval Mintz 223fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 224fe56b9e6SYuval Mintz "Doorbelled [0x%08x, CID 0x%08x] with Flags: %02x agg_params: %02x, prod: %04x\n", 225fe56b9e6SYuval Mintz qed_db_addr(p_spq->cid, DQ_DEMS_LEGACY), 226fe56b9e6SYuval Mintz p_spq->cid, db.params, db.agg_flags, 227fe56b9e6SYuval Mintz qed_chain_get_prod_idx(p_chain)); 228fe56b9e6SYuval Mintz 229fe56b9e6SYuval Mintz return 0; 230fe56b9e6SYuval Mintz } 231fe56b9e6SYuval Mintz 232fe56b9e6SYuval Mintz /*************************************************************************** 233fe56b9e6SYuval Mintz * Asynchronous events 234fe56b9e6SYuval Mintz ***************************************************************************/ 235fe56b9e6SYuval Mintz static int 236fe56b9e6SYuval Mintz qed_async_event_completion(struct qed_hwfn *p_hwfn, 237fe56b9e6SYuval Mintz struct event_ring_entry *p_eqe) 238fe56b9e6SYuval Mintz { 23937bff2b9SYuval Mintz switch (p_eqe->protocol_id) { 24037bff2b9SYuval Mintz case PROTOCOLID_COMMON: 24137bff2b9SYuval Mintz return qed_sriov_eqe_event(p_hwfn, 24237bff2b9SYuval Mintz p_eqe->opcode, 24337bff2b9SYuval Mintz p_eqe->echo, &p_eqe->data); 24437bff2b9SYuval Mintz default: 245fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, 246fe56b9e6SYuval Mintz "Unknown Async completion for protocol: %d\n", 247fe56b9e6SYuval Mintz p_eqe->protocol_id); 248fe56b9e6SYuval Mintz return -EINVAL; 249fe56b9e6SYuval Mintz } 25037bff2b9SYuval Mintz } 251fe56b9e6SYuval Mintz 252fe56b9e6SYuval Mintz /*************************************************************************** 253fe56b9e6SYuval Mintz * EQ API 254fe56b9e6SYuval Mintz ***************************************************************************/ 2551a635e48SYuval Mintz void qed_eq_prod_update(struct qed_hwfn *p_hwfn, u16 prod) 256fe56b9e6SYuval Mintz { 257fe56b9e6SYuval Mintz u32 addr = GTT_BAR0_MAP_REG_USDM_RAM + 258fe56b9e6SYuval Mintz USTORM_EQE_CONS_OFFSET(p_hwfn->rel_pf_id); 259fe56b9e6SYuval Mintz 260fe56b9e6SYuval Mintz REG_WR16(p_hwfn, addr, prod); 261fe56b9e6SYuval Mintz 262fe56b9e6SYuval Mintz /* keep prod updates ordered */ 263fe56b9e6SYuval Mintz mmiowb(); 264fe56b9e6SYuval Mintz } 265fe56b9e6SYuval Mintz 2661a635e48SYuval Mintz int qed_eq_completion(struct qed_hwfn *p_hwfn, void *cookie) 267fe56b9e6SYuval Mintz { 268fe56b9e6SYuval Mintz struct qed_eq *p_eq = cookie; 269fe56b9e6SYuval Mintz struct qed_chain *p_chain = &p_eq->chain; 270fe56b9e6SYuval Mintz int rc = 0; 271fe56b9e6SYuval Mintz 272fe56b9e6SYuval Mintz /* take a snapshot of the FW consumer */ 273fe56b9e6SYuval Mintz u16 fw_cons_idx = le16_to_cpu(*p_eq->p_fw_cons); 274fe56b9e6SYuval Mintz 275fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, "fw_cons_idx %x\n", fw_cons_idx); 276fe56b9e6SYuval Mintz 277fe56b9e6SYuval Mintz /* Need to guarantee the fw_cons index we use points to a usuable 278fe56b9e6SYuval Mintz * element (to comply with our chain), so our macros would comply 279fe56b9e6SYuval Mintz */ 280fe56b9e6SYuval Mintz if ((fw_cons_idx & qed_chain_get_usable_per_page(p_chain)) == 281fe56b9e6SYuval Mintz qed_chain_get_usable_per_page(p_chain)) 282fe56b9e6SYuval Mintz fw_cons_idx += qed_chain_get_unusable_per_page(p_chain); 283fe56b9e6SYuval Mintz 284fe56b9e6SYuval Mintz /* Complete current segment of eq entries */ 285fe56b9e6SYuval Mintz while (fw_cons_idx != qed_chain_get_cons_idx(p_chain)) { 286fe56b9e6SYuval Mintz struct event_ring_entry *p_eqe = qed_chain_consume(p_chain); 287fe56b9e6SYuval Mintz 288fe56b9e6SYuval Mintz if (!p_eqe) { 289fe56b9e6SYuval Mintz rc = -EINVAL; 290fe56b9e6SYuval Mintz break; 291fe56b9e6SYuval Mintz } 292fe56b9e6SYuval Mintz 293fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 294fe56b9e6SYuval Mintz "op %x prot %x res0 %x echo %x fwret %x flags %x\n", 295fe56b9e6SYuval Mintz p_eqe->opcode, 296fe56b9e6SYuval Mintz p_eqe->protocol_id, 297fe56b9e6SYuval Mintz p_eqe->reserved0, 298fe56b9e6SYuval Mintz le16_to_cpu(p_eqe->echo), 299fe56b9e6SYuval Mintz p_eqe->fw_return_code, 300fe56b9e6SYuval Mintz p_eqe->flags); 301fe56b9e6SYuval Mintz 302fe56b9e6SYuval Mintz if (GET_FIELD(p_eqe->flags, EVENT_RING_ENTRY_ASYNC)) { 303fe56b9e6SYuval Mintz if (qed_async_event_completion(p_hwfn, p_eqe)) 304fe56b9e6SYuval Mintz rc = -EINVAL; 305fe56b9e6SYuval Mintz } else if (qed_spq_completion(p_hwfn, 306fe56b9e6SYuval Mintz p_eqe->echo, 307fe56b9e6SYuval Mintz p_eqe->fw_return_code, 308fe56b9e6SYuval Mintz &p_eqe->data)) { 309fe56b9e6SYuval Mintz rc = -EINVAL; 310fe56b9e6SYuval Mintz } 311fe56b9e6SYuval Mintz 312fe56b9e6SYuval Mintz qed_chain_recycle_consumed(p_chain); 313fe56b9e6SYuval Mintz } 314fe56b9e6SYuval Mintz 315fe56b9e6SYuval Mintz qed_eq_prod_update(p_hwfn, qed_chain_get_prod_idx(p_chain)); 316fe56b9e6SYuval Mintz 317fe56b9e6SYuval Mintz return rc; 318fe56b9e6SYuval Mintz } 319fe56b9e6SYuval Mintz 3201a635e48SYuval Mintz struct qed_eq *qed_eq_alloc(struct qed_hwfn *p_hwfn, u16 num_elem) 321fe56b9e6SYuval Mintz { 322fe56b9e6SYuval Mintz struct qed_eq *p_eq; 323fe56b9e6SYuval Mintz 324fe56b9e6SYuval Mintz /* Allocate EQ struct */ 32560fffb3bSYuval Mintz p_eq = kzalloc(sizeof(*p_eq), GFP_KERNEL); 3262591c280SJoe Perches if (!p_eq) 327fe56b9e6SYuval Mintz return NULL; 328fe56b9e6SYuval Mintz 329fe56b9e6SYuval Mintz /* Allocate and initialize EQ chain*/ 330fe56b9e6SYuval Mintz if (qed_chain_alloc(p_hwfn->cdev, 331fe56b9e6SYuval Mintz QED_CHAIN_USE_TO_PRODUCE, 332fe56b9e6SYuval Mintz QED_CHAIN_MODE_PBL, 333a91eb52aSYuval Mintz QED_CHAIN_CNT_TYPE_U16, 334fe56b9e6SYuval Mintz num_elem, 335fe56b9e6SYuval Mintz sizeof(union event_ring_element), 3362591c280SJoe Perches &p_eq->chain)) 337fe56b9e6SYuval Mintz goto eq_allocate_fail; 338fe56b9e6SYuval Mintz 339fe56b9e6SYuval Mintz /* register EQ completion on the SP SB */ 3401a635e48SYuval Mintz qed_int_register_cb(p_hwfn, qed_eq_completion, 3411a635e48SYuval Mintz p_eq, &p_eq->eq_sb_index, &p_eq->p_fw_cons); 342fe56b9e6SYuval Mintz 343fe56b9e6SYuval Mintz return p_eq; 344fe56b9e6SYuval Mintz 345fe56b9e6SYuval Mintz eq_allocate_fail: 346fe56b9e6SYuval Mintz qed_eq_free(p_hwfn, p_eq); 347fe56b9e6SYuval Mintz return NULL; 348fe56b9e6SYuval Mintz } 349fe56b9e6SYuval Mintz 3501a635e48SYuval Mintz void qed_eq_setup(struct qed_hwfn *p_hwfn, struct qed_eq *p_eq) 351fe56b9e6SYuval Mintz { 352fe56b9e6SYuval Mintz qed_chain_reset(&p_eq->chain); 353fe56b9e6SYuval Mintz } 354fe56b9e6SYuval Mintz 3551a635e48SYuval Mintz void qed_eq_free(struct qed_hwfn *p_hwfn, struct qed_eq *p_eq) 356fe56b9e6SYuval Mintz { 357fe56b9e6SYuval Mintz if (!p_eq) 358fe56b9e6SYuval Mintz return; 359fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_eq->chain); 360fe56b9e6SYuval Mintz kfree(p_eq); 361fe56b9e6SYuval Mintz } 362fe56b9e6SYuval Mintz 363fe56b9e6SYuval Mintz /*************************************************************************** 364cee4d264SManish Chopra * CQE API - manipulate EQ functionality 365cee4d264SManish Chopra ***************************************************************************/ 3661a635e48SYuval Mintz static int qed_cqe_completion(struct qed_hwfn *p_hwfn, 367cee4d264SManish Chopra struct eth_slow_path_rx_cqe *cqe, 368cee4d264SManish Chopra enum protocol_type protocol) 369cee4d264SManish Chopra { 3701408cc1fSYuval Mintz if (IS_VF(p_hwfn->cdev)) 3711408cc1fSYuval Mintz return 0; 3721408cc1fSYuval Mintz 373cee4d264SManish Chopra /* @@@tmp - it's possible we'll eventually want to handle some 374cee4d264SManish Chopra * actual commands that can arrive here, but for now this is only 375cee4d264SManish Chopra * used to complete the ramrod using the echo value on the cqe 376cee4d264SManish Chopra */ 377cee4d264SManish Chopra return qed_spq_completion(p_hwfn, cqe->echo, 0, NULL); 378cee4d264SManish Chopra } 379cee4d264SManish Chopra 380cee4d264SManish Chopra int qed_eth_cqe_completion(struct qed_hwfn *p_hwfn, 381cee4d264SManish Chopra struct eth_slow_path_rx_cqe *cqe) 382cee4d264SManish Chopra { 383cee4d264SManish Chopra int rc; 384cee4d264SManish Chopra 385cee4d264SManish Chopra rc = qed_cqe_completion(p_hwfn, cqe, PROTOCOLID_ETH); 386cee4d264SManish Chopra if (rc) 387cee4d264SManish Chopra DP_NOTICE(p_hwfn, 388cee4d264SManish Chopra "Failed to handle RXQ CQE [cmd 0x%02x]\n", 389cee4d264SManish Chopra cqe->ramrod_cmd_id); 390cee4d264SManish Chopra 391cee4d264SManish Chopra return rc; 392cee4d264SManish Chopra } 393cee4d264SManish Chopra 394cee4d264SManish Chopra /*************************************************************************** 395fe56b9e6SYuval Mintz * Slow hwfn Queue (spq) 396fe56b9e6SYuval Mintz ***************************************************************************/ 397fe56b9e6SYuval Mintz void qed_spq_setup(struct qed_hwfn *p_hwfn) 398fe56b9e6SYuval Mintz { 399fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 400fe56b9e6SYuval Mintz struct qed_spq_entry *p_virt = NULL; 401fe56b9e6SYuval Mintz dma_addr_t p_phys = 0; 402a91eb52aSYuval Mintz u32 i, capacity; 403fe56b9e6SYuval Mintz 404fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->pending); 405fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->completion_pending); 406fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->free_pool); 407fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->unlimited_pending); 408fe56b9e6SYuval Mintz spin_lock_init(&p_spq->lock); 409fe56b9e6SYuval Mintz 410fe56b9e6SYuval Mintz /* SPQ empty pool */ 411fe56b9e6SYuval Mintz p_phys = p_spq->p_phys + offsetof(struct qed_spq_entry, ramrod); 412fe56b9e6SYuval Mintz p_virt = p_spq->p_virt; 413fe56b9e6SYuval Mintz 414a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 415a91eb52aSYuval Mintz for (i = 0; i < capacity; i++) { 41694494598SYuval Mintz DMA_REGPAIR_LE(p_virt->elem.data_ptr, p_phys); 417fe56b9e6SYuval Mintz 418fe56b9e6SYuval Mintz list_add_tail(&p_virt->list, &p_spq->free_pool); 419fe56b9e6SYuval Mintz 420fe56b9e6SYuval Mintz p_virt++; 421fe56b9e6SYuval Mintz p_phys += sizeof(struct qed_spq_entry); 422fe56b9e6SYuval Mintz } 423fe56b9e6SYuval Mintz 424fe56b9e6SYuval Mintz /* Statistics */ 425fe56b9e6SYuval Mintz p_spq->normal_count = 0; 426fe56b9e6SYuval Mintz p_spq->comp_count = 0; 427fe56b9e6SYuval Mintz p_spq->comp_sent_count = 0; 428fe56b9e6SYuval Mintz p_spq->unlimited_pending_count = 0; 42976a9a364STomer Tayar 43076a9a364STomer Tayar bitmap_zero(p_spq->p_comp_bitmap, SPQ_RING_SIZE); 43176a9a364STomer Tayar p_spq->comp_bitmap_idx = 0; 432fe56b9e6SYuval Mintz 433fe56b9e6SYuval Mintz /* SPQ cid, cannot fail */ 434fe56b9e6SYuval Mintz qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_spq->cid); 435fe56b9e6SYuval Mintz qed_spq_hw_initialize(p_hwfn, p_spq); 436fe56b9e6SYuval Mintz 437fe56b9e6SYuval Mintz /* reset the chain itself */ 438fe56b9e6SYuval Mintz qed_chain_reset(&p_spq->chain); 439fe56b9e6SYuval Mintz } 440fe56b9e6SYuval Mintz 441fe56b9e6SYuval Mintz int qed_spq_alloc(struct qed_hwfn *p_hwfn) 442fe56b9e6SYuval Mintz { 443a91eb52aSYuval Mintz struct qed_spq_entry *p_virt = NULL; 444fe56b9e6SYuval Mintz struct qed_spq *p_spq = NULL; 445fe56b9e6SYuval Mintz dma_addr_t p_phys = 0; 446a91eb52aSYuval Mintz u32 capacity; 447fe56b9e6SYuval Mintz 448fe56b9e6SYuval Mintz /* SPQ struct */ 4491a635e48SYuval Mintz p_spq = kzalloc(sizeof(struct qed_spq), GFP_KERNEL); 4502591c280SJoe Perches if (!p_spq) 451fe56b9e6SYuval Mintz return -ENOMEM; 452fe56b9e6SYuval Mintz 453fe56b9e6SYuval Mintz /* SPQ ring */ 454fe56b9e6SYuval Mintz if (qed_chain_alloc(p_hwfn->cdev, 455fe56b9e6SYuval Mintz QED_CHAIN_USE_TO_PRODUCE, 456fe56b9e6SYuval Mintz QED_CHAIN_MODE_SINGLE, 457a91eb52aSYuval Mintz QED_CHAIN_CNT_TYPE_U16, 458fe56b9e6SYuval Mintz 0, /* N/A when the mode is SINGLE */ 459fe56b9e6SYuval Mintz sizeof(struct slow_path_element), 4602591c280SJoe Perches &p_spq->chain)) 461fe56b9e6SYuval Mintz goto spq_allocate_fail; 462fe56b9e6SYuval Mintz 463fe56b9e6SYuval Mintz /* allocate and fill the SPQ elements (incl. ramrod data list) */ 464a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 465fe56b9e6SYuval Mintz p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev, 4662591c280SJoe Perches capacity * sizeof(struct qed_spq_entry), 467a91eb52aSYuval Mintz &p_phys, GFP_KERNEL); 468fe56b9e6SYuval Mintz if (!p_virt) 469fe56b9e6SYuval Mintz goto spq_allocate_fail; 470fe56b9e6SYuval Mintz 471fe56b9e6SYuval Mintz p_spq->p_virt = p_virt; 472fe56b9e6SYuval Mintz p_spq->p_phys = p_phys; 473fe56b9e6SYuval Mintz p_hwfn->p_spq = p_spq; 474fe56b9e6SYuval Mintz 475fe56b9e6SYuval Mintz return 0; 476fe56b9e6SYuval Mintz 477fe56b9e6SYuval Mintz spq_allocate_fail: 478fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_spq->chain); 479fe56b9e6SYuval Mintz kfree(p_spq); 480fe56b9e6SYuval Mintz return -ENOMEM; 481fe56b9e6SYuval Mintz } 482fe56b9e6SYuval Mintz 483fe56b9e6SYuval Mintz void qed_spq_free(struct qed_hwfn *p_hwfn) 484fe56b9e6SYuval Mintz { 485fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 486a91eb52aSYuval Mintz u32 capacity; 487fe56b9e6SYuval Mintz 488fe56b9e6SYuval Mintz if (!p_spq) 489fe56b9e6SYuval Mintz return; 490fe56b9e6SYuval Mintz 491a91eb52aSYuval Mintz if (p_spq->p_virt) { 492a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 493fe56b9e6SYuval Mintz dma_free_coherent(&p_hwfn->cdev->pdev->dev, 494a91eb52aSYuval Mintz capacity * 495fe56b9e6SYuval Mintz sizeof(struct qed_spq_entry), 496a91eb52aSYuval Mintz p_spq->p_virt, p_spq->p_phys); 497a91eb52aSYuval Mintz } 498fe56b9e6SYuval Mintz 499fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_spq->chain); 500fe56b9e6SYuval Mintz ; 501fe56b9e6SYuval Mintz kfree(p_spq); 502fe56b9e6SYuval Mintz } 503fe56b9e6SYuval Mintz 5041a635e48SYuval Mintz int qed_spq_get_entry(struct qed_hwfn *p_hwfn, struct qed_spq_entry **pp_ent) 505fe56b9e6SYuval Mintz { 506fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 507fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 508fe56b9e6SYuval Mintz int rc = 0; 509fe56b9e6SYuval Mintz 510fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 511fe56b9e6SYuval Mintz 512fe56b9e6SYuval Mintz if (list_empty(&p_spq->free_pool)) { 513fe56b9e6SYuval Mintz p_ent = kzalloc(sizeof(*p_ent), GFP_ATOMIC); 514fe56b9e6SYuval Mintz if (!p_ent) { 5151a635e48SYuval Mintz DP_NOTICE(p_hwfn, 5161a635e48SYuval Mintz "Failed to allocate an SPQ entry for a pending ramrod\n"); 517fe56b9e6SYuval Mintz rc = -ENOMEM; 518fe56b9e6SYuval Mintz goto out_unlock; 519fe56b9e6SYuval Mintz } 520fe56b9e6SYuval Mintz p_ent->queue = &p_spq->unlimited_pending; 521fe56b9e6SYuval Mintz } else { 522fe56b9e6SYuval Mintz p_ent = list_first_entry(&p_spq->free_pool, 5231a635e48SYuval Mintz struct qed_spq_entry, list); 524fe56b9e6SYuval Mintz list_del(&p_ent->list); 525fe56b9e6SYuval Mintz p_ent->queue = &p_spq->pending; 526fe56b9e6SYuval Mintz } 527fe56b9e6SYuval Mintz 528fe56b9e6SYuval Mintz *pp_ent = p_ent; 529fe56b9e6SYuval Mintz 530fe56b9e6SYuval Mintz out_unlock: 531fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 532fe56b9e6SYuval Mintz return rc; 533fe56b9e6SYuval Mintz } 534fe56b9e6SYuval Mintz 535fe56b9e6SYuval Mintz /* Locked variant; Should be called while the SPQ lock is taken */ 536fe56b9e6SYuval Mintz static void __qed_spq_return_entry(struct qed_hwfn *p_hwfn, 537fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent) 538fe56b9e6SYuval Mintz { 539fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_hwfn->p_spq->free_pool); 540fe56b9e6SYuval Mintz } 541fe56b9e6SYuval Mintz 5421a635e48SYuval Mintz void qed_spq_return_entry(struct qed_hwfn *p_hwfn, struct qed_spq_entry *p_ent) 543fe56b9e6SYuval Mintz { 544fe56b9e6SYuval Mintz spin_lock_bh(&p_hwfn->p_spq->lock); 545fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 546fe56b9e6SYuval Mintz spin_unlock_bh(&p_hwfn->p_spq->lock); 547fe56b9e6SYuval Mintz } 548fe56b9e6SYuval Mintz 549fe56b9e6SYuval Mintz /** 550fe56b9e6SYuval Mintz * @brief qed_spq_add_entry - adds a new entry to the pending 551fe56b9e6SYuval Mintz * list. Should be used while lock is being held. 552fe56b9e6SYuval Mintz * 553fe56b9e6SYuval Mintz * Addes an entry to the pending list is there is room (en empty 554fe56b9e6SYuval Mintz * element is available in the free_pool), or else places the 555fe56b9e6SYuval Mintz * entry in the unlimited_pending pool. 556fe56b9e6SYuval Mintz * 557fe56b9e6SYuval Mintz * @param p_hwfn 558fe56b9e6SYuval Mintz * @param p_ent 559fe56b9e6SYuval Mintz * @param priority 560fe56b9e6SYuval Mintz * 561fe56b9e6SYuval Mintz * @return int 562fe56b9e6SYuval Mintz */ 5631a635e48SYuval Mintz static int qed_spq_add_entry(struct qed_hwfn *p_hwfn, 564fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent, 565fe56b9e6SYuval Mintz enum spq_priority priority) 566fe56b9e6SYuval Mintz { 567fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 568fe56b9e6SYuval Mintz 569fe56b9e6SYuval Mintz if (p_ent->queue == &p_spq->unlimited_pending) { 570fe56b9e6SYuval Mintz 571fe56b9e6SYuval Mintz if (list_empty(&p_spq->free_pool)) { 572fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->unlimited_pending); 573fe56b9e6SYuval Mintz p_spq->unlimited_pending_count++; 574fe56b9e6SYuval Mintz 575fe56b9e6SYuval Mintz return 0; 57676a9a364STomer Tayar } else { 57776a9a364STomer Tayar struct qed_spq_entry *p_en2; 578fe56b9e6SYuval Mintz 579fe56b9e6SYuval Mintz p_en2 = list_first_entry(&p_spq->free_pool, 5801a635e48SYuval Mintz struct qed_spq_entry, list); 581fe56b9e6SYuval Mintz list_del(&p_en2->list); 582fe56b9e6SYuval Mintz 58376a9a364STomer Tayar /* Copy the ring element physical pointer to the new 58476a9a364STomer Tayar * entry, since we are about to override the entire ring 58576a9a364STomer Tayar * entry and don't want to lose the pointer. 58676a9a364STomer Tayar */ 58776a9a364STomer Tayar p_ent->elem.data_ptr = p_en2->elem.data_ptr; 58876a9a364STomer Tayar 589fe56b9e6SYuval Mintz *p_en2 = *p_ent; 590fe56b9e6SYuval Mintz 591db511c37SYuval Mintz /* EBLOCK responsible to free the allocated p_ent */ 592db511c37SYuval Mintz if (p_ent->comp_mode != QED_SPQ_MODE_EBLOCK) 593fe56b9e6SYuval Mintz kfree(p_ent); 594fe56b9e6SYuval Mintz 595fe56b9e6SYuval Mintz p_ent = p_en2; 596fe56b9e6SYuval Mintz } 59776a9a364STomer Tayar } 598fe56b9e6SYuval Mintz 599fe56b9e6SYuval Mintz /* entry is to be placed in 'pending' queue */ 600fe56b9e6SYuval Mintz switch (priority) { 601fe56b9e6SYuval Mintz case QED_SPQ_PRIORITY_NORMAL: 602fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->pending); 603fe56b9e6SYuval Mintz p_spq->normal_count++; 604fe56b9e6SYuval Mintz break; 605fe56b9e6SYuval Mintz case QED_SPQ_PRIORITY_HIGH: 606fe56b9e6SYuval Mintz list_add(&p_ent->list, &p_spq->pending); 607fe56b9e6SYuval Mintz p_spq->high_count++; 608fe56b9e6SYuval Mintz break; 609fe56b9e6SYuval Mintz default: 610fe56b9e6SYuval Mintz return -EINVAL; 611fe56b9e6SYuval Mintz } 612fe56b9e6SYuval Mintz 613fe56b9e6SYuval Mintz return 0; 614fe56b9e6SYuval Mintz } 615fe56b9e6SYuval Mintz 616fe56b9e6SYuval Mintz /*************************************************************************** 617fe56b9e6SYuval Mintz * Accessor 618fe56b9e6SYuval Mintz ***************************************************************************/ 619fe56b9e6SYuval Mintz u32 qed_spq_get_cid(struct qed_hwfn *p_hwfn) 620fe56b9e6SYuval Mintz { 621fe56b9e6SYuval Mintz if (!p_hwfn->p_spq) 622fe56b9e6SYuval Mintz return 0xffffffff; /* illegal */ 623fe56b9e6SYuval Mintz return p_hwfn->p_spq->cid; 624fe56b9e6SYuval Mintz } 625fe56b9e6SYuval Mintz 626fe56b9e6SYuval Mintz /*************************************************************************** 627fe56b9e6SYuval Mintz * Posting new Ramrods 628fe56b9e6SYuval Mintz ***************************************************************************/ 629fe56b9e6SYuval Mintz static int qed_spq_post_list(struct qed_hwfn *p_hwfn, 6301a635e48SYuval Mintz struct list_head *head, u32 keep_reserve) 631fe56b9e6SYuval Mintz { 632fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 633fe56b9e6SYuval Mintz int rc; 634fe56b9e6SYuval Mintz 635fe56b9e6SYuval Mintz while (qed_chain_get_elem_left(&p_spq->chain) > keep_reserve && 636fe56b9e6SYuval Mintz !list_empty(head)) { 637fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = 638fe56b9e6SYuval Mintz list_first_entry(head, struct qed_spq_entry, list); 639fe56b9e6SYuval Mintz list_del(&p_ent->list); 640fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->completion_pending); 641fe56b9e6SYuval Mintz p_spq->comp_sent_count++; 642fe56b9e6SYuval Mintz 643fe56b9e6SYuval Mintz rc = qed_spq_hw_post(p_hwfn, p_spq, p_ent); 644fe56b9e6SYuval Mintz if (rc) { 645fe56b9e6SYuval Mintz list_del(&p_ent->list); 646fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 647fe56b9e6SYuval Mintz return rc; 648fe56b9e6SYuval Mintz } 649fe56b9e6SYuval Mintz } 650fe56b9e6SYuval Mintz 651fe56b9e6SYuval Mintz return 0; 652fe56b9e6SYuval Mintz } 653fe56b9e6SYuval Mintz 654fe56b9e6SYuval Mintz static int qed_spq_pend_post(struct qed_hwfn *p_hwfn) 655fe56b9e6SYuval Mintz { 656fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 657fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 658fe56b9e6SYuval Mintz 659fe56b9e6SYuval Mintz while (!list_empty(&p_spq->free_pool)) { 660fe56b9e6SYuval Mintz if (list_empty(&p_spq->unlimited_pending)) 661fe56b9e6SYuval Mintz break; 662fe56b9e6SYuval Mintz 663fe56b9e6SYuval Mintz p_ent = list_first_entry(&p_spq->unlimited_pending, 6641a635e48SYuval Mintz struct qed_spq_entry, list); 665fe56b9e6SYuval Mintz if (!p_ent) 666fe56b9e6SYuval Mintz return -EINVAL; 667fe56b9e6SYuval Mintz 668fe56b9e6SYuval Mintz list_del(&p_ent->list); 669fe56b9e6SYuval Mintz 670fe56b9e6SYuval Mintz qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); 671fe56b9e6SYuval Mintz } 672fe56b9e6SYuval Mintz 673fe56b9e6SYuval Mintz return qed_spq_post_list(p_hwfn, &p_spq->pending, 674fe56b9e6SYuval Mintz SPQ_HIGH_PRI_RESERVE_DEFAULT); 675fe56b9e6SYuval Mintz } 676fe56b9e6SYuval Mintz 677fe56b9e6SYuval Mintz int qed_spq_post(struct qed_hwfn *p_hwfn, 6781a635e48SYuval Mintz struct qed_spq_entry *p_ent, u8 *fw_return_code) 679fe56b9e6SYuval Mintz { 680fe56b9e6SYuval Mintz int rc = 0; 681fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn ? p_hwfn->p_spq : NULL; 682fe56b9e6SYuval Mintz bool b_ret_ent = true; 683fe56b9e6SYuval Mintz 684fe56b9e6SYuval Mintz if (!p_hwfn) 685fe56b9e6SYuval Mintz return -EINVAL; 686fe56b9e6SYuval Mintz 687fe56b9e6SYuval Mintz if (!p_ent) { 688fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Got a NULL pointer\n"); 689fe56b9e6SYuval Mintz return -EINVAL; 690fe56b9e6SYuval Mintz } 691fe56b9e6SYuval Mintz 692fe56b9e6SYuval Mintz /* Complete the entry */ 693fe56b9e6SYuval Mintz rc = qed_spq_fill_entry(p_hwfn, p_ent); 694fe56b9e6SYuval Mintz 695fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 696fe56b9e6SYuval Mintz 697fe56b9e6SYuval Mintz /* Check return value after LOCK is taken for cleaner error flow */ 698fe56b9e6SYuval Mintz if (rc) 699fe56b9e6SYuval Mintz goto spq_post_fail; 700fe56b9e6SYuval Mintz 701fe56b9e6SYuval Mintz /* Add the request to the pending queue */ 702fe56b9e6SYuval Mintz rc = qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); 703fe56b9e6SYuval Mintz if (rc) 704fe56b9e6SYuval Mintz goto spq_post_fail; 705fe56b9e6SYuval Mintz 706fe56b9e6SYuval Mintz rc = qed_spq_pend_post(p_hwfn); 707fe56b9e6SYuval Mintz if (rc) { 708fe56b9e6SYuval Mintz /* Since it's possible that pending failed for a different 709fe56b9e6SYuval Mintz * entry [although unlikely], the failed entry was already 710fe56b9e6SYuval Mintz * dealt with; No need to return it here. 711fe56b9e6SYuval Mintz */ 712fe56b9e6SYuval Mintz b_ret_ent = false; 713fe56b9e6SYuval Mintz goto spq_post_fail; 714fe56b9e6SYuval Mintz } 715fe56b9e6SYuval Mintz 716fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 717fe56b9e6SYuval Mintz 718fe56b9e6SYuval Mintz if (p_ent->comp_mode == QED_SPQ_MODE_EBLOCK) { 719fe56b9e6SYuval Mintz /* For entries in QED BLOCK mode, the completion code cannot 720fe56b9e6SYuval Mintz * perform the necessary cleanup - if it did, we couldn't 721fe56b9e6SYuval Mintz * access p_ent here to see whether it's successful or not. 722fe56b9e6SYuval Mintz * Thus, after gaining the answer perform the cleanup here. 723fe56b9e6SYuval Mintz */ 724fe56b9e6SYuval Mintz rc = qed_spq_block(p_hwfn, p_ent, fw_return_code); 725db511c37SYuval Mintz 726db511c37SYuval Mintz if (p_ent->queue == &p_spq->unlimited_pending) { 727db511c37SYuval Mintz /* This is an allocated p_ent which does not need to 728db511c37SYuval Mintz * return to pool. 729db511c37SYuval Mintz */ 730db511c37SYuval Mintz kfree(p_ent); 731db511c37SYuval Mintz return rc; 732db511c37SYuval Mintz } 733db511c37SYuval Mintz 734fe56b9e6SYuval Mintz if (rc) 735fe56b9e6SYuval Mintz goto spq_post_fail2; 736fe56b9e6SYuval Mintz 737fe56b9e6SYuval Mintz /* return to pool */ 738fe56b9e6SYuval Mintz qed_spq_return_entry(p_hwfn, p_ent); 739fe56b9e6SYuval Mintz } 740fe56b9e6SYuval Mintz return rc; 741fe56b9e6SYuval Mintz 742fe56b9e6SYuval Mintz spq_post_fail2: 743fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 744fe56b9e6SYuval Mintz list_del(&p_ent->list); 745fe56b9e6SYuval Mintz qed_chain_return_produced(&p_spq->chain); 746fe56b9e6SYuval Mintz 747fe56b9e6SYuval Mintz spq_post_fail: 748fe56b9e6SYuval Mintz /* return to the free pool */ 749fe56b9e6SYuval Mintz if (b_ret_ent) 750fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 751fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 752fe56b9e6SYuval Mintz 753fe56b9e6SYuval Mintz return rc; 754fe56b9e6SYuval Mintz } 755fe56b9e6SYuval Mintz 756fe56b9e6SYuval Mintz int qed_spq_completion(struct qed_hwfn *p_hwfn, 757fe56b9e6SYuval Mintz __le16 echo, 758fe56b9e6SYuval Mintz u8 fw_return_code, 759fe56b9e6SYuval Mintz union event_ring_data *p_data) 760fe56b9e6SYuval Mintz { 761fe56b9e6SYuval Mintz struct qed_spq *p_spq; 762fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 763fe56b9e6SYuval Mintz struct qed_spq_entry *tmp; 764fe56b9e6SYuval Mintz struct qed_spq_entry *found = NULL; 765fe56b9e6SYuval Mintz int rc; 766fe56b9e6SYuval Mintz 767fe56b9e6SYuval Mintz if (!p_hwfn) 768fe56b9e6SYuval Mintz return -EINVAL; 769fe56b9e6SYuval Mintz 770fe56b9e6SYuval Mintz p_spq = p_hwfn->p_spq; 771fe56b9e6SYuval Mintz if (!p_spq) 772fe56b9e6SYuval Mintz return -EINVAL; 773fe56b9e6SYuval Mintz 774fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 7751a635e48SYuval Mintz list_for_each_entry_safe(p_ent, tmp, &p_spq->completion_pending, list) { 776fe56b9e6SYuval Mintz if (p_ent->elem.hdr.echo == echo) { 77776a9a364STomer Tayar u16 pos = le16_to_cpu(echo) % SPQ_RING_SIZE; 77876a9a364STomer Tayar 779fe56b9e6SYuval Mintz list_del(&p_ent->list); 780fe56b9e6SYuval Mintz 78176a9a364STomer Tayar /* Avoid overriding of SPQ entries when getting 78276a9a364STomer Tayar * out-of-order completions, by marking the completions 78376a9a364STomer Tayar * in a bitmap and increasing the chain consumer only 78476a9a364STomer Tayar * for the first successive completed entries. 78576a9a364STomer Tayar */ 78659d3f1ceSManish Chopra __set_bit(pos, p_spq->p_comp_bitmap); 78776a9a364STomer Tayar 78876a9a364STomer Tayar while (test_bit(p_spq->comp_bitmap_idx, 78976a9a364STomer Tayar p_spq->p_comp_bitmap)) { 79059d3f1ceSManish Chopra __clear_bit(p_spq->comp_bitmap_idx, 79159d3f1ceSManish Chopra p_spq->p_comp_bitmap); 79276a9a364STomer Tayar p_spq->comp_bitmap_idx++; 793fe56b9e6SYuval Mintz qed_chain_return_produced(&p_spq->chain); 79476a9a364STomer Tayar } 79576a9a364STomer Tayar 796fe56b9e6SYuval Mintz p_spq->comp_count++; 797fe56b9e6SYuval Mintz found = p_ent; 798fe56b9e6SYuval Mintz break; 799fe56b9e6SYuval Mintz } 80076a9a364STomer Tayar 80176a9a364STomer Tayar /* This is relatively uncommon - depends on scenarios 80276a9a364STomer Tayar * which have mutliple per-PF sent ramrods. 80376a9a364STomer Tayar */ 80476a9a364STomer Tayar DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 80576a9a364STomer Tayar "Got completion for echo %04x - doesn't match echo %04x in completion pending list\n", 80676a9a364STomer Tayar le16_to_cpu(echo), 80776a9a364STomer Tayar le16_to_cpu(p_ent->elem.hdr.echo)); 808fe56b9e6SYuval Mintz } 809fe56b9e6SYuval Mintz 810fe56b9e6SYuval Mintz /* Release lock before callback, as callback may post 811fe56b9e6SYuval Mintz * an additional ramrod. 812fe56b9e6SYuval Mintz */ 813fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 814fe56b9e6SYuval Mintz 815fe56b9e6SYuval Mintz if (!found) { 816fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, 817525ef5c0SYuval Mintz "Failed to find an entry this EQE [echo %04x] completes\n", 818525ef5c0SYuval Mintz le16_to_cpu(echo)); 819fe56b9e6SYuval Mintz return -EEXIST; 820fe56b9e6SYuval Mintz } 821fe56b9e6SYuval Mintz 822525ef5c0SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 823525ef5c0SYuval Mintz "Complete EQE [echo %04x]: func %p cookie %p)\n", 824525ef5c0SYuval Mintz le16_to_cpu(echo), 825fe56b9e6SYuval Mintz p_ent->comp_cb.function, p_ent->comp_cb.cookie); 826fe56b9e6SYuval Mintz if (found->comp_cb.function) 827fe56b9e6SYuval Mintz found->comp_cb.function(p_hwfn, found->comp_cb.cookie, p_data, 828fe56b9e6SYuval Mintz fw_return_code); 829525ef5c0SYuval Mintz else 830525ef5c0SYuval Mintz DP_VERBOSE(p_hwfn, 831525ef5c0SYuval Mintz QED_MSG_SPQ, 832525ef5c0SYuval Mintz "Got a completion without a callback function\n"); 833fe56b9e6SYuval Mintz 834db511c37SYuval Mintz if ((found->comp_mode != QED_SPQ_MODE_EBLOCK) || 835db511c37SYuval Mintz (found->queue == &p_spq->unlimited_pending)) 836db511c37SYuval Mintz /* EBLOCK is responsible for returning its own entry into the 837db511c37SYuval Mintz * free list, unless it originally added the entry into the 838db511c37SYuval Mintz * unlimited pending list. 839db511c37SYuval Mintz */ 840fe56b9e6SYuval Mintz qed_spq_return_entry(p_hwfn, found); 841fe56b9e6SYuval Mintz 842fe56b9e6SYuval Mintz /* Attempt to post pending requests */ 843fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 844fe56b9e6SYuval Mintz rc = qed_spq_pend_post(p_hwfn); 845fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 846fe56b9e6SYuval Mintz 847fe56b9e6SYuval Mintz return rc; 848fe56b9e6SYuval Mintz } 849fe56b9e6SYuval Mintz 850fe56b9e6SYuval Mintz struct qed_consq *qed_consq_alloc(struct qed_hwfn *p_hwfn) 851fe56b9e6SYuval Mintz { 852fe56b9e6SYuval Mintz struct qed_consq *p_consq; 853fe56b9e6SYuval Mintz 854fe56b9e6SYuval Mintz /* Allocate ConsQ struct */ 85560fffb3bSYuval Mintz p_consq = kzalloc(sizeof(*p_consq), GFP_KERNEL); 8562591c280SJoe Perches if (!p_consq) 857fe56b9e6SYuval Mintz return NULL; 858fe56b9e6SYuval Mintz 859fe56b9e6SYuval Mintz /* Allocate and initialize EQ chain*/ 860fe56b9e6SYuval Mintz if (qed_chain_alloc(p_hwfn->cdev, 861fe56b9e6SYuval Mintz QED_CHAIN_USE_TO_PRODUCE, 862fe56b9e6SYuval Mintz QED_CHAIN_MODE_PBL, 863a91eb52aSYuval Mintz QED_CHAIN_CNT_TYPE_U16, 864fe56b9e6SYuval Mintz QED_CHAIN_PAGE_SIZE / 0x80, 8652591c280SJoe Perches 0x80, &p_consq->chain)) 866fe56b9e6SYuval Mintz goto consq_allocate_fail; 867fe56b9e6SYuval Mintz 868fe56b9e6SYuval Mintz return p_consq; 869fe56b9e6SYuval Mintz 870fe56b9e6SYuval Mintz consq_allocate_fail: 871fe56b9e6SYuval Mintz qed_consq_free(p_hwfn, p_consq); 872fe56b9e6SYuval Mintz return NULL; 873fe56b9e6SYuval Mintz } 874fe56b9e6SYuval Mintz 8751a635e48SYuval Mintz void qed_consq_setup(struct qed_hwfn *p_hwfn, struct qed_consq *p_consq) 876fe56b9e6SYuval Mintz { 877fe56b9e6SYuval Mintz qed_chain_reset(&p_consq->chain); 878fe56b9e6SYuval Mintz } 879fe56b9e6SYuval Mintz 8801a635e48SYuval Mintz void qed_consq_free(struct qed_hwfn *p_hwfn, struct qed_consq *p_consq) 881fe56b9e6SYuval Mintz { 882fe56b9e6SYuval Mintz if (!p_consq) 883fe56b9e6SYuval Mintz return; 884fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_consq->chain); 885fe56b9e6SYuval Mintz kfree(p_consq); 886fe56b9e6SYuval Mintz } 887