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" 27fc831825SYuval Mintz #include "qed_iscsi.h" 28fe56b9e6SYuval Mintz #include "qed_mcp.h" 291d6cff4fSYuval Mintz #include "qed_ooo.h" 30fe56b9e6SYuval Mintz #include "qed_reg_addr.h" 31fe56b9e6SYuval Mintz #include "qed_sp.h" 3237bff2b9SYuval Mintz #include "qed_sriov.h" 3351ff1725SRam Amrani #include "qed_roce.h" 34fe56b9e6SYuval Mintz 35fe56b9e6SYuval Mintz /*************************************************************************** 36fe56b9e6SYuval Mintz * Structures & Definitions 37fe56b9e6SYuval Mintz ***************************************************************************/ 38fe56b9e6SYuval Mintz 39fe56b9e6SYuval Mintz #define SPQ_HIGH_PRI_RESERVE_DEFAULT (1) 40c59f5291SYuval Mintz 41c59f5291SYuval Mintz #define SPQ_BLOCK_DELAY_MAX_ITER (10) 42c59f5291SYuval Mintz #define SPQ_BLOCK_DELAY_US (10) 43c59f5291SYuval Mintz #define SPQ_BLOCK_SLEEP_MAX_ITER (1000) 44c59f5291SYuval Mintz #define SPQ_BLOCK_SLEEP_MS (5) 45fe56b9e6SYuval Mintz 46fe56b9e6SYuval Mintz /*************************************************************************** 47fe56b9e6SYuval Mintz * Blocking Imp. (BLOCK/EBLOCK mode) 48fe56b9e6SYuval Mintz ***************************************************************************/ 49fe56b9e6SYuval Mintz static void qed_spq_blocking_cb(struct qed_hwfn *p_hwfn, 50fe56b9e6SYuval Mintz void *cookie, 511a635e48SYuval Mintz union event_ring_data *data, u8 fw_return_code) 52fe56b9e6SYuval Mintz { 53fe56b9e6SYuval Mintz struct qed_spq_comp_done *comp_done; 54fe56b9e6SYuval Mintz 55fe56b9e6SYuval Mintz comp_done = (struct qed_spq_comp_done *)cookie; 56fe56b9e6SYuval Mintz 57fe56b9e6SYuval Mintz comp_done->fw_return_code = fw_return_code; 58fe56b9e6SYuval Mintz 59d5df7688SManish Chopra /* Make sure completion done is visible on waiting thread */ 60d5df7688SManish Chopra smp_store_release(&comp_done->done, 0x1); 61fe56b9e6SYuval Mintz } 62fe56b9e6SYuval Mintz 63c59f5291SYuval Mintz static int __qed_spq_block(struct qed_hwfn *p_hwfn, 64c59f5291SYuval Mintz struct qed_spq_entry *p_ent, 65c59f5291SYuval Mintz u8 *p_fw_ret, bool sleep_between_iter) 66c59f5291SYuval Mintz { 67c59f5291SYuval Mintz struct qed_spq_comp_done *comp_done; 68c59f5291SYuval Mintz u32 iter_cnt; 69c59f5291SYuval Mintz 70c59f5291SYuval Mintz comp_done = (struct qed_spq_comp_done *)p_ent->comp_cb.cookie; 71c59f5291SYuval Mintz iter_cnt = sleep_between_iter ? SPQ_BLOCK_SLEEP_MAX_ITER 72c59f5291SYuval Mintz : SPQ_BLOCK_DELAY_MAX_ITER; 73c59f5291SYuval Mintz 74c59f5291SYuval Mintz while (iter_cnt--) { 75c59f5291SYuval Mintz /* Validate we receive completion update */ 76d5df7688SManish Chopra if (READ_ONCE(comp_done->done) == 1) { 77d5df7688SManish Chopra /* Read updated FW return value */ 78d5df7688SManish Chopra smp_read_barrier_depends(); 79c59f5291SYuval Mintz if (p_fw_ret) 80c59f5291SYuval Mintz *p_fw_ret = comp_done->fw_return_code; 81c59f5291SYuval Mintz return 0; 82c59f5291SYuval Mintz } 83c59f5291SYuval Mintz 84c59f5291SYuval Mintz if (sleep_between_iter) 85c59f5291SYuval Mintz msleep(SPQ_BLOCK_SLEEP_MS); 86c59f5291SYuval Mintz else 87c59f5291SYuval Mintz udelay(SPQ_BLOCK_DELAY_US); 88c59f5291SYuval Mintz } 89c59f5291SYuval Mintz 90c59f5291SYuval Mintz return -EBUSY; 91c59f5291SYuval Mintz } 92c59f5291SYuval Mintz 93fe56b9e6SYuval Mintz static int qed_spq_block(struct qed_hwfn *p_hwfn, 94fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent, 95c59f5291SYuval Mintz u8 *p_fw_ret, bool skip_quick_poll) 96fe56b9e6SYuval Mintz { 97fe56b9e6SYuval Mintz struct qed_spq_comp_done *comp_done; 98fe56b9e6SYuval Mintz int rc; 99fe56b9e6SYuval Mintz 100c59f5291SYuval Mintz /* A relatively short polling period w/o sleeping, to allow the FW to 101c59f5291SYuval Mintz * complete the ramrod and thus possibly to avoid the following sleeps. 102c59f5291SYuval Mintz */ 103c59f5291SYuval Mintz if (!skip_quick_poll) { 104c59f5291SYuval Mintz rc = __qed_spq_block(p_hwfn, p_ent, p_fw_ret, false); 105c59f5291SYuval Mintz if (!rc) 106fe56b9e6SYuval Mintz return 0; 107fe56b9e6SYuval Mintz } 108c59f5291SYuval Mintz 109c59f5291SYuval Mintz /* Move to polling with a sleeping period between iterations */ 110c59f5291SYuval Mintz rc = __qed_spq_block(p_hwfn, p_ent, p_fw_ret, true); 111c59f5291SYuval Mintz if (!rc) 112c59f5291SYuval Mintz return 0; 113fe56b9e6SYuval Mintz 114fe56b9e6SYuval Mintz DP_INFO(p_hwfn, "Ramrod is stuck, requesting MCP drain\n"); 115fe56b9e6SYuval Mintz rc = qed_mcp_drain(p_hwfn, p_hwfn->p_main_ptt); 116c59f5291SYuval Mintz if (rc) { 117fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "MCP drain failed\n"); 118c59f5291SYuval Mintz goto err; 119c59f5291SYuval Mintz } 120fe56b9e6SYuval Mintz 121fe56b9e6SYuval Mintz /* Retry after drain */ 122c59f5291SYuval Mintz rc = __qed_spq_block(p_hwfn, p_ent, p_fw_ret, true); 123c59f5291SYuval Mintz if (!rc) 124c59f5291SYuval Mintz return 0; 125c59f5291SYuval Mintz 126c59f5291SYuval Mintz comp_done = (struct qed_spq_comp_done *)p_ent->comp_cb.cookie; 127fe56b9e6SYuval Mintz if (comp_done->done == 1) { 128fe56b9e6SYuval Mintz if (p_fw_ret) 129fe56b9e6SYuval Mintz *p_fw_ret = comp_done->fw_return_code; 130fe56b9e6SYuval Mintz return 0; 131fe56b9e6SYuval Mintz } 132c59f5291SYuval Mintz err: 133c59f5291SYuval Mintz DP_NOTICE(p_hwfn, 134c59f5291SYuval Mintz "Ramrod is stuck [CID %08x cmd %02x protocol %02x echo %04x]\n", 135c59f5291SYuval Mintz le32_to_cpu(p_ent->elem.hdr.cid), 136c59f5291SYuval Mintz p_ent->elem.hdr.cmd_id, 137c59f5291SYuval Mintz p_ent->elem.hdr.protocol_id, 138c59f5291SYuval Mintz le16_to_cpu(p_ent->elem.hdr.echo)); 139fe56b9e6SYuval Mintz 140fe56b9e6SYuval Mintz return -EBUSY; 141fe56b9e6SYuval Mintz } 142fe56b9e6SYuval Mintz 143fe56b9e6SYuval Mintz /*************************************************************************** 144fe56b9e6SYuval Mintz * SPQ entries inner API 145fe56b9e6SYuval Mintz ***************************************************************************/ 1461a635e48SYuval Mintz static int qed_spq_fill_entry(struct qed_hwfn *p_hwfn, 147fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent) 148fe56b9e6SYuval Mintz { 149fe56b9e6SYuval Mintz p_ent->flags = 0; 150fe56b9e6SYuval Mintz 151fe56b9e6SYuval Mintz switch (p_ent->comp_mode) { 152fe56b9e6SYuval Mintz case QED_SPQ_MODE_EBLOCK: 153fe56b9e6SYuval Mintz case QED_SPQ_MODE_BLOCK: 154fe56b9e6SYuval Mintz p_ent->comp_cb.function = qed_spq_blocking_cb; 155fe56b9e6SYuval Mintz break; 156fe56b9e6SYuval Mintz case QED_SPQ_MODE_CB: 157fe56b9e6SYuval Mintz break; 158fe56b9e6SYuval Mintz default: 159fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Unknown SPQE completion mode %d\n", 160fe56b9e6SYuval Mintz p_ent->comp_mode); 161fe56b9e6SYuval Mintz return -EINVAL; 162fe56b9e6SYuval Mintz } 163fe56b9e6SYuval Mintz 164fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 165fe56b9e6SYuval Mintz "Ramrod header: [CID 0x%08x CMD 0x%02x protocol 0x%02x] Data pointer: [%08x:%08x] Completion Mode: %s\n", 166fe56b9e6SYuval Mintz p_ent->elem.hdr.cid, 167fe56b9e6SYuval Mintz p_ent->elem.hdr.cmd_id, 168fe56b9e6SYuval Mintz p_ent->elem.hdr.protocol_id, 169fe56b9e6SYuval Mintz p_ent->elem.data_ptr.hi, 170fe56b9e6SYuval Mintz p_ent->elem.data_ptr.lo, 171fe56b9e6SYuval Mintz D_TRINE(p_ent->comp_mode, QED_SPQ_MODE_EBLOCK, 172fe56b9e6SYuval Mintz QED_SPQ_MODE_BLOCK, "MODE_EBLOCK", "MODE_BLOCK", 173fe56b9e6SYuval Mintz "MODE_CB")); 174fe56b9e6SYuval Mintz 175fe56b9e6SYuval Mintz return 0; 176fe56b9e6SYuval Mintz } 177fe56b9e6SYuval Mintz 178fe56b9e6SYuval Mintz /*************************************************************************** 179fe56b9e6SYuval Mintz * HSI access 180fe56b9e6SYuval Mintz ***************************************************************************/ 181fe56b9e6SYuval Mintz static void qed_spq_hw_initialize(struct qed_hwfn *p_hwfn, 182fe56b9e6SYuval Mintz struct qed_spq *p_spq) 183fe56b9e6SYuval Mintz { 184fe56b9e6SYuval Mintz u16 pq; 185fe56b9e6SYuval Mintz struct qed_cxt_info cxt_info; 186fe56b9e6SYuval Mintz struct core_conn_context *p_cxt; 187fe56b9e6SYuval Mintz union qed_qm_pq_params pq_params; 188fe56b9e6SYuval Mintz int rc; 189fe56b9e6SYuval Mintz 190fe56b9e6SYuval Mintz cxt_info.iid = p_spq->cid; 191fe56b9e6SYuval Mintz 192fe56b9e6SYuval Mintz rc = qed_cxt_get_cid_info(p_hwfn, &cxt_info); 193fe56b9e6SYuval Mintz 194fe56b9e6SYuval Mintz if (rc < 0) { 195fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Cannot find context info for cid=%d\n", 196fe56b9e6SYuval Mintz p_spq->cid); 197fe56b9e6SYuval Mintz return; 198fe56b9e6SYuval Mintz } 199fe56b9e6SYuval Mintz 200fe56b9e6SYuval Mintz p_cxt = cxt_info.p_cxt; 201fe56b9e6SYuval Mintz 202fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags10, 203fe56b9e6SYuval Mintz XSTORM_CORE_CONN_AG_CTX_DQ_CF_EN, 1); 204fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags1, 205fe56b9e6SYuval Mintz XSTORM_CORE_CONN_AG_CTX_DQ_CF_ACTIVE, 1); 206fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags9, 207fe56b9e6SYuval Mintz XSTORM_CORE_CONN_AG_CTX_CONSOLID_PROD_CF_EN, 1); 208fe56b9e6SYuval Mintz 209fe56b9e6SYuval Mintz /* QM physical queue */ 210fe56b9e6SYuval Mintz memset(&pq_params, 0, sizeof(pq_params)); 211fe56b9e6SYuval Mintz pq_params.core.tc = LB_TC; 212fe56b9e6SYuval Mintz pq = qed_get_qm_pq(p_hwfn, PROTOCOLID_CORE, &pq_params); 213fe56b9e6SYuval Mintz p_cxt->xstorm_ag_context.physical_q0 = cpu_to_le16(pq); 214fe56b9e6SYuval Mintz 215fe56b9e6SYuval Mintz p_cxt->xstorm_st_context.spq_base_lo = 216fe56b9e6SYuval Mintz DMA_LO_LE(p_spq->chain.p_phys_addr); 217fe56b9e6SYuval Mintz p_cxt->xstorm_st_context.spq_base_hi = 218fe56b9e6SYuval Mintz DMA_HI_LE(p_spq->chain.p_phys_addr); 219fe56b9e6SYuval Mintz 22094494598SYuval Mintz DMA_REGPAIR_LE(p_cxt->xstorm_st_context.consolid_base_addr, 22194494598SYuval Mintz p_hwfn->p_consq->chain.p_phys_addr); 222fe56b9e6SYuval Mintz } 223fe56b9e6SYuval Mintz 224fe56b9e6SYuval Mintz static int qed_spq_hw_post(struct qed_hwfn *p_hwfn, 2251a635e48SYuval Mintz struct qed_spq *p_spq, struct qed_spq_entry *p_ent) 226fe56b9e6SYuval Mintz { 227fe56b9e6SYuval Mintz struct qed_chain *p_chain = &p_hwfn->p_spq->chain; 22876a9a364STomer Tayar u16 echo = qed_chain_get_prod_idx(p_chain); 229fe56b9e6SYuval Mintz struct slow_path_element *elem; 230fe56b9e6SYuval Mintz struct core_db_data db; 231fe56b9e6SYuval Mintz 23276a9a364STomer Tayar p_ent->elem.hdr.echo = cpu_to_le16(echo); 233fe56b9e6SYuval Mintz elem = qed_chain_produce(p_chain); 234fe56b9e6SYuval Mintz if (!elem) { 235fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Failed to produce from SPQ chain\n"); 236fe56b9e6SYuval Mintz return -EINVAL; 237fe56b9e6SYuval Mintz } 238fe56b9e6SYuval Mintz 239fe56b9e6SYuval Mintz *elem = p_ent->elem; /* struct assignment */ 240fe56b9e6SYuval Mintz 241fe56b9e6SYuval Mintz /* send a doorbell on the slow hwfn session */ 242fe56b9e6SYuval Mintz memset(&db, 0, sizeof(db)); 243fe56b9e6SYuval Mintz SET_FIELD(db.params, CORE_DB_DATA_DEST, DB_DEST_XCM); 244fe56b9e6SYuval Mintz SET_FIELD(db.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET); 245fe56b9e6SYuval Mintz SET_FIELD(db.params, CORE_DB_DATA_AGG_VAL_SEL, 246fe56b9e6SYuval Mintz DQ_XCM_CORE_SPQ_PROD_CMD); 247fe56b9e6SYuval Mintz db.agg_flags = DQ_XCM_CORE_DQ_CF_CMD; 248fe56b9e6SYuval Mintz db.spq_prod = cpu_to_le16(qed_chain_get_prod_idx(p_chain)); 249fe56b9e6SYuval Mintz 25034c7bb47SSudarsana Reddy Kalluru /* make sure the SPQE is updated before the doorbell */ 25134c7bb47SSudarsana Reddy Kalluru wmb(); 252fe56b9e6SYuval Mintz 253fe56b9e6SYuval Mintz DOORBELL(p_hwfn, qed_db_addr(p_spq->cid, DQ_DEMS_LEGACY), *(u32 *)&db); 254fe56b9e6SYuval Mintz 255fe56b9e6SYuval Mintz /* make sure doorbell is rang */ 25634c7bb47SSudarsana Reddy Kalluru wmb(); 257fe56b9e6SYuval Mintz 258fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 259fe56b9e6SYuval Mintz "Doorbelled [0x%08x, CID 0x%08x] with Flags: %02x agg_params: %02x, prod: %04x\n", 260fe56b9e6SYuval Mintz qed_db_addr(p_spq->cid, DQ_DEMS_LEGACY), 261fe56b9e6SYuval Mintz p_spq->cid, db.params, db.agg_flags, 262fe56b9e6SYuval Mintz qed_chain_get_prod_idx(p_chain)); 263fe56b9e6SYuval Mintz 264fe56b9e6SYuval Mintz return 0; 265fe56b9e6SYuval Mintz } 266fe56b9e6SYuval Mintz 267fe56b9e6SYuval Mintz /*************************************************************************** 268fe56b9e6SYuval Mintz * Asynchronous events 269fe56b9e6SYuval Mintz ***************************************************************************/ 270fe56b9e6SYuval Mintz static int 271fe56b9e6SYuval Mintz qed_async_event_completion(struct qed_hwfn *p_hwfn, 272fe56b9e6SYuval Mintz struct event_ring_entry *p_eqe) 273fe56b9e6SYuval Mintz { 27437bff2b9SYuval Mintz switch (p_eqe->protocol_id) { 27551ff1725SRam Amrani case PROTOCOLID_ROCE: 27651ff1725SRam Amrani qed_async_roce_event(p_hwfn, p_eqe); 27751ff1725SRam Amrani return 0; 27837bff2b9SYuval Mintz case PROTOCOLID_COMMON: 27937bff2b9SYuval Mintz return qed_sriov_eqe_event(p_hwfn, 28037bff2b9SYuval Mintz p_eqe->opcode, 28137bff2b9SYuval Mintz p_eqe->echo, &p_eqe->data); 282fc831825SYuval Mintz case PROTOCOLID_ISCSI: 283fc831825SYuval Mintz if (!IS_ENABLED(CONFIG_QED_ISCSI)) 284fc831825SYuval Mintz return -EINVAL; 2851d6cff4fSYuval Mintz if (p_eqe->opcode == ISCSI_EVENT_TYPE_ASYN_DELETE_OOO_ISLES) { 2861d6cff4fSYuval Mintz u32 cid = le32_to_cpu(p_eqe->data.iscsi_info.cid); 2871d6cff4fSYuval Mintz 2881d6cff4fSYuval Mintz qed_ooo_release_connection_isles(p_hwfn, 2891d6cff4fSYuval Mintz p_hwfn->p_ooo_info, 2901d6cff4fSYuval Mintz cid); 2911d6cff4fSYuval Mintz return 0; 2921d6cff4fSYuval Mintz } 293fc831825SYuval Mintz 294fc831825SYuval Mintz if (p_hwfn->p_iscsi_info->event_cb) { 295fc831825SYuval Mintz struct qed_iscsi_info *p_iscsi = p_hwfn->p_iscsi_info; 296fc831825SYuval Mintz 297fc831825SYuval Mintz return p_iscsi->event_cb(p_iscsi->event_context, 298fc831825SYuval Mintz p_eqe->opcode, &p_eqe->data); 299fc831825SYuval Mintz } else { 300fc831825SYuval Mintz DP_NOTICE(p_hwfn, 301fc831825SYuval Mintz "iSCSI async completion is not set\n"); 302fc831825SYuval Mintz return -EINVAL; 303fc831825SYuval Mintz } 30437bff2b9SYuval Mintz default: 305fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, 306fe56b9e6SYuval Mintz "Unknown Async completion for protocol: %d\n", 307fe56b9e6SYuval Mintz p_eqe->protocol_id); 308fe56b9e6SYuval Mintz return -EINVAL; 309fe56b9e6SYuval Mintz } 31037bff2b9SYuval Mintz } 311fe56b9e6SYuval Mintz 312fe56b9e6SYuval Mintz /*************************************************************************** 313fe56b9e6SYuval Mintz * EQ API 314fe56b9e6SYuval Mintz ***************************************************************************/ 3151a635e48SYuval Mintz void qed_eq_prod_update(struct qed_hwfn *p_hwfn, u16 prod) 316fe56b9e6SYuval Mintz { 317fe56b9e6SYuval Mintz u32 addr = GTT_BAR0_MAP_REG_USDM_RAM + 318fe56b9e6SYuval Mintz USTORM_EQE_CONS_OFFSET(p_hwfn->rel_pf_id); 319fe56b9e6SYuval Mintz 320fe56b9e6SYuval Mintz REG_WR16(p_hwfn, addr, prod); 321fe56b9e6SYuval Mintz 322fe56b9e6SYuval Mintz /* keep prod updates ordered */ 323fe56b9e6SYuval Mintz mmiowb(); 324fe56b9e6SYuval Mintz } 325fe56b9e6SYuval Mintz 3261a635e48SYuval Mintz int qed_eq_completion(struct qed_hwfn *p_hwfn, void *cookie) 327fe56b9e6SYuval Mintz { 328fe56b9e6SYuval Mintz struct qed_eq *p_eq = cookie; 329fe56b9e6SYuval Mintz struct qed_chain *p_chain = &p_eq->chain; 330fe56b9e6SYuval Mintz int rc = 0; 331fe56b9e6SYuval Mintz 332fe56b9e6SYuval Mintz /* take a snapshot of the FW consumer */ 333fe56b9e6SYuval Mintz u16 fw_cons_idx = le16_to_cpu(*p_eq->p_fw_cons); 334fe56b9e6SYuval Mintz 335fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, "fw_cons_idx %x\n", fw_cons_idx); 336fe56b9e6SYuval Mintz 337fe56b9e6SYuval Mintz /* Need to guarantee the fw_cons index we use points to a usuable 338fe56b9e6SYuval Mintz * element (to comply with our chain), so our macros would comply 339fe56b9e6SYuval Mintz */ 340fe56b9e6SYuval Mintz if ((fw_cons_idx & qed_chain_get_usable_per_page(p_chain)) == 341fe56b9e6SYuval Mintz qed_chain_get_usable_per_page(p_chain)) 342fe56b9e6SYuval Mintz fw_cons_idx += qed_chain_get_unusable_per_page(p_chain); 343fe56b9e6SYuval Mintz 344fe56b9e6SYuval Mintz /* Complete current segment of eq entries */ 345fe56b9e6SYuval Mintz while (fw_cons_idx != qed_chain_get_cons_idx(p_chain)) { 346fe56b9e6SYuval Mintz struct event_ring_entry *p_eqe = qed_chain_consume(p_chain); 347fe56b9e6SYuval Mintz 348fe56b9e6SYuval Mintz if (!p_eqe) { 349fe56b9e6SYuval Mintz rc = -EINVAL; 350fe56b9e6SYuval Mintz break; 351fe56b9e6SYuval Mintz } 352fe56b9e6SYuval Mintz 353fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 354fe56b9e6SYuval Mintz "op %x prot %x res0 %x echo %x fwret %x flags %x\n", 355fe56b9e6SYuval Mintz p_eqe->opcode, 356fe56b9e6SYuval Mintz p_eqe->protocol_id, 357fe56b9e6SYuval Mintz p_eqe->reserved0, 358fe56b9e6SYuval Mintz le16_to_cpu(p_eqe->echo), 359fe56b9e6SYuval Mintz p_eqe->fw_return_code, 360fe56b9e6SYuval Mintz p_eqe->flags); 361fe56b9e6SYuval Mintz 362fe56b9e6SYuval Mintz if (GET_FIELD(p_eqe->flags, EVENT_RING_ENTRY_ASYNC)) { 363fe56b9e6SYuval Mintz if (qed_async_event_completion(p_hwfn, p_eqe)) 364fe56b9e6SYuval Mintz rc = -EINVAL; 365fe56b9e6SYuval Mintz } else if (qed_spq_completion(p_hwfn, 366fe56b9e6SYuval Mintz p_eqe->echo, 367fe56b9e6SYuval Mintz p_eqe->fw_return_code, 368fe56b9e6SYuval Mintz &p_eqe->data)) { 369fe56b9e6SYuval Mintz rc = -EINVAL; 370fe56b9e6SYuval Mintz } 371fe56b9e6SYuval Mintz 372fe56b9e6SYuval Mintz qed_chain_recycle_consumed(p_chain); 373fe56b9e6SYuval Mintz } 374fe56b9e6SYuval Mintz 375fe56b9e6SYuval Mintz qed_eq_prod_update(p_hwfn, qed_chain_get_prod_idx(p_chain)); 376fe56b9e6SYuval Mintz 377fe56b9e6SYuval Mintz return rc; 378fe56b9e6SYuval Mintz } 379fe56b9e6SYuval Mintz 3801a635e48SYuval Mintz struct qed_eq *qed_eq_alloc(struct qed_hwfn *p_hwfn, u16 num_elem) 381fe56b9e6SYuval Mintz { 382fe56b9e6SYuval Mintz struct qed_eq *p_eq; 383fe56b9e6SYuval Mintz 384fe56b9e6SYuval Mintz /* Allocate EQ struct */ 38560fffb3bSYuval Mintz p_eq = kzalloc(sizeof(*p_eq), GFP_KERNEL); 3862591c280SJoe Perches if (!p_eq) 387fe56b9e6SYuval Mintz return NULL; 388fe56b9e6SYuval Mintz 389fe56b9e6SYuval Mintz /* Allocate and initialize EQ chain*/ 390fe56b9e6SYuval Mintz if (qed_chain_alloc(p_hwfn->cdev, 391fe56b9e6SYuval Mintz QED_CHAIN_USE_TO_PRODUCE, 392fe56b9e6SYuval Mintz QED_CHAIN_MODE_PBL, 393a91eb52aSYuval Mintz QED_CHAIN_CNT_TYPE_U16, 394fe56b9e6SYuval Mintz num_elem, 395fe56b9e6SYuval Mintz sizeof(union event_ring_element), 3962591c280SJoe Perches &p_eq->chain)) 397fe56b9e6SYuval Mintz goto eq_allocate_fail; 398fe56b9e6SYuval Mintz 399fe56b9e6SYuval Mintz /* register EQ completion on the SP SB */ 4001a635e48SYuval Mintz qed_int_register_cb(p_hwfn, qed_eq_completion, 4011a635e48SYuval Mintz p_eq, &p_eq->eq_sb_index, &p_eq->p_fw_cons); 402fe56b9e6SYuval Mintz 403fe56b9e6SYuval Mintz return p_eq; 404fe56b9e6SYuval Mintz 405fe56b9e6SYuval Mintz eq_allocate_fail: 406fe56b9e6SYuval Mintz qed_eq_free(p_hwfn, p_eq); 407fe56b9e6SYuval Mintz return NULL; 408fe56b9e6SYuval Mintz } 409fe56b9e6SYuval Mintz 4101a635e48SYuval Mintz void qed_eq_setup(struct qed_hwfn *p_hwfn, struct qed_eq *p_eq) 411fe56b9e6SYuval Mintz { 412fe56b9e6SYuval Mintz qed_chain_reset(&p_eq->chain); 413fe56b9e6SYuval Mintz } 414fe56b9e6SYuval Mintz 4151a635e48SYuval Mintz void qed_eq_free(struct qed_hwfn *p_hwfn, struct qed_eq *p_eq) 416fe56b9e6SYuval Mintz { 417fe56b9e6SYuval Mintz if (!p_eq) 418fe56b9e6SYuval Mintz return; 419fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_eq->chain); 420fe56b9e6SYuval Mintz kfree(p_eq); 421fe56b9e6SYuval Mintz } 422fe56b9e6SYuval Mintz 423fe56b9e6SYuval Mintz /*************************************************************************** 424cee4d264SManish Chopra * CQE API - manipulate EQ functionality 425cee4d264SManish Chopra ***************************************************************************/ 4261a635e48SYuval Mintz static int qed_cqe_completion(struct qed_hwfn *p_hwfn, 427cee4d264SManish Chopra struct eth_slow_path_rx_cqe *cqe, 428cee4d264SManish Chopra enum protocol_type protocol) 429cee4d264SManish Chopra { 4301408cc1fSYuval Mintz if (IS_VF(p_hwfn->cdev)) 4311408cc1fSYuval Mintz return 0; 4321408cc1fSYuval Mintz 433cee4d264SManish Chopra /* @@@tmp - it's possible we'll eventually want to handle some 434cee4d264SManish Chopra * actual commands that can arrive here, but for now this is only 435cee4d264SManish Chopra * used to complete the ramrod using the echo value on the cqe 436cee4d264SManish Chopra */ 437cee4d264SManish Chopra return qed_spq_completion(p_hwfn, cqe->echo, 0, NULL); 438cee4d264SManish Chopra } 439cee4d264SManish Chopra 440cee4d264SManish Chopra int qed_eth_cqe_completion(struct qed_hwfn *p_hwfn, 441cee4d264SManish Chopra struct eth_slow_path_rx_cqe *cqe) 442cee4d264SManish Chopra { 443cee4d264SManish Chopra int rc; 444cee4d264SManish Chopra 445cee4d264SManish Chopra rc = qed_cqe_completion(p_hwfn, cqe, PROTOCOLID_ETH); 446cee4d264SManish Chopra if (rc) 447cee4d264SManish Chopra DP_NOTICE(p_hwfn, 448cee4d264SManish Chopra "Failed to handle RXQ CQE [cmd 0x%02x]\n", 449cee4d264SManish Chopra cqe->ramrod_cmd_id); 450cee4d264SManish Chopra 451cee4d264SManish Chopra return rc; 452cee4d264SManish Chopra } 453cee4d264SManish Chopra 454cee4d264SManish Chopra /*************************************************************************** 455fe56b9e6SYuval Mintz * Slow hwfn Queue (spq) 456fe56b9e6SYuval Mintz ***************************************************************************/ 457fe56b9e6SYuval Mintz void qed_spq_setup(struct qed_hwfn *p_hwfn) 458fe56b9e6SYuval Mintz { 459fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 460fe56b9e6SYuval Mintz struct qed_spq_entry *p_virt = NULL; 461fe56b9e6SYuval Mintz dma_addr_t p_phys = 0; 462a91eb52aSYuval Mintz u32 i, capacity; 463fe56b9e6SYuval Mintz 464fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->pending); 465fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->completion_pending); 466fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->free_pool); 467fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->unlimited_pending); 468fe56b9e6SYuval Mintz spin_lock_init(&p_spq->lock); 469fe56b9e6SYuval Mintz 470fe56b9e6SYuval Mintz /* SPQ empty pool */ 471fe56b9e6SYuval Mintz p_phys = p_spq->p_phys + offsetof(struct qed_spq_entry, ramrod); 472fe56b9e6SYuval Mintz p_virt = p_spq->p_virt; 473fe56b9e6SYuval Mintz 474a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 475a91eb52aSYuval Mintz for (i = 0; i < capacity; i++) { 47694494598SYuval Mintz DMA_REGPAIR_LE(p_virt->elem.data_ptr, p_phys); 477fe56b9e6SYuval Mintz 478fe56b9e6SYuval Mintz list_add_tail(&p_virt->list, &p_spq->free_pool); 479fe56b9e6SYuval Mintz 480fe56b9e6SYuval Mintz p_virt++; 481fe56b9e6SYuval Mintz p_phys += sizeof(struct qed_spq_entry); 482fe56b9e6SYuval Mintz } 483fe56b9e6SYuval Mintz 484fe56b9e6SYuval Mintz /* Statistics */ 485fe56b9e6SYuval Mintz p_spq->normal_count = 0; 486fe56b9e6SYuval Mintz p_spq->comp_count = 0; 487fe56b9e6SYuval Mintz p_spq->comp_sent_count = 0; 488fe56b9e6SYuval Mintz p_spq->unlimited_pending_count = 0; 48976a9a364STomer Tayar 49076a9a364STomer Tayar bitmap_zero(p_spq->p_comp_bitmap, SPQ_RING_SIZE); 49176a9a364STomer Tayar p_spq->comp_bitmap_idx = 0; 492fe56b9e6SYuval Mintz 493fe56b9e6SYuval Mintz /* SPQ cid, cannot fail */ 494fe56b9e6SYuval Mintz qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_spq->cid); 495fe56b9e6SYuval Mintz qed_spq_hw_initialize(p_hwfn, p_spq); 496fe56b9e6SYuval Mintz 497fe56b9e6SYuval Mintz /* reset the chain itself */ 498fe56b9e6SYuval Mintz qed_chain_reset(&p_spq->chain); 499fe56b9e6SYuval Mintz } 500fe56b9e6SYuval Mintz 501fe56b9e6SYuval Mintz int qed_spq_alloc(struct qed_hwfn *p_hwfn) 502fe56b9e6SYuval Mintz { 503a91eb52aSYuval Mintz struct qed_spq_entry *p_virt = NULL; 504fe56b9e6SYuval Mintz struct qed_spq *p_spq = NULL; 505fe56b9e6SYuval Mintz dma_addr_t p_phys = 0; 506a91eb52aSYuval Mintz u32 capacity; 507fe56b9e6SYuval Mintz 508fe56b9e6SYuval Mintz /* SPQ struct */ 5091a635e48SYuval Mintz p_spq = kzalloc(sizeof(struct qed_spq), GFP_KERNEL); 5102591c280SJoe Perches if (!p_spq) 511fe56b9e6SYuval Mintz return -ENOMEM; 512fe56b9e6SYuval Mintz 513fe56b9e6SYuval Mintz /* SPQ ring */ 514fe56b9e6SYuval Mintz if (qed_chain_alloc(p_hwfn->cdev, 515fe56b9e6SYuval Mintz QED_CHAIN_USE_TO_PRODUCE, 516fe56b9e6SYuval Mintz QED_CHAIN_MODE_SINGLE, 517a91eb52aSYuval Mintz QED_CHAIN_CNT_TYPE_U16, 518fe56b9e6SYuval Mintz 0, /* N/A when the mode is SINGLE */ 519fe56b9e6SYuval Mintz sizeof(struct slow_path_element), 5202591c280SJoe Perches &p_spq->chain)) 521fe56b9e6SYuval Mintz goto spq_allocate_fail; 522fe56b9e6SYuval Mintz 523fe56b9e6SYuval Mintz /* allocate and fill the SPQ elements (incl. ramrod data list) */ 524a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 525fe56b9e6SYuval Mintz p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev, 5262591c280SJoe Perches capacity * sizeof(struct qed_spq_entry), 527a91eb52aSYuval Mintz &p_phys, GFP_KERNEL); 528fe56b9e6SYuval Mintz if (!p_virt) 529fe56b9e6SYuval Mintz goto spq_allocate_fail; 530fe56b9e6SYuval Mintz 531fe56b9e6SYuval Mintz p_spq->p_virt = p_virt; 532fe56b9e6SYuval Mintz p_spq->p_phys = p_phys; 533fe56b9e6SYuval Mintz p_hwfn->p_spq = p_spq; 534fe56b9e6SYuval Mintz 535fe56b9e6SYuval Mintz return 0; 536fe56b9e6SYuval Mintz 537fe56b9e6SYuval Mintz spq_allocate_fail: 538fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_spq->chain); 539fe56b9e6SYuval Mintz kfree(p_spq); 540fe56b9e6SYuval Mintz return -ENOMEM; 541fe56b9e6SYuval Mintz } 542fe56b9e6SYuval Mintz 543fe56b9e6SYuval Mintz void qed_spq_free(struct qed_hwfn *p_hwfn) 544fe56b9e6SYuval Mintz { 545fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 546a91eb52aSYuval Mintz u32 capacity; 547fe56b9e6SYuval Mintz 548fe56b9e6SYuval Mintz if (!p_spq) 549fe56b9e6SYuval Mintz return; 550fe56b9e6SYuval Mintz 551a91eb52aSYuval Mintz if (p_spq->p_virt) { 552a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 553fe56b9e6SYuval Mintz dma_free_coherent(&p_hwfn->cdev->pdev->dev, 554a91eb52aSYuval Mintz capacity * 555fe56b9e6SYuval Mintz sizeof(struct qed_spq_entry), 556a91eb52aSYuval Mintz p_spq->p_virt, p_spq->p_phys); 557a91eb52aSYuval Mintz } 558fe56b9e6SYuval Mintz 559fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_spq->chain); 560fe56b9e6SYuval Mintz ; 561fe56b9e6SYuval Mintz kfree(p_spq); 562fe56b9e6SYuval Mintz } 563fe56b9e6SYuval Mintz 5641a635e48SYuval Mintz int qed_spq_get_entry(struct qed_hwfn *p_hwfn, struct qed_spq_entry **pp_ent) 565fe56b9e6SYuval Mintz { 566fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 567fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 568fe56b9e6SYuval Mintz int rc = 0; 569fe56b9e6SYuval Mintz 570fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 571fe56b9e6SYuval Mintz 572fe56b9e6SYuval Mintz if (list_empty(&p_spq->free_pool)) { 573fe56b9e6SYuval Mintz p_ent = kzalloc(sizeof(*p_ent), GFP_ATOMIC); 574fe56b9e6SYuval Mintz if (!p_ent) { 5751a635e48SYuval Mintz DP_NOTICE(p_hwfn, 5761a635e48SYuval Mintz "Failed to allocate an SPQ entry for a pending ramrod\n"); 577fe56b9e6SYuval Mintz rc = -ENOMEM; 578fe56b9e6SYuval Mintz goto out_unlock; 579fe56b9e6SYuval Mintz } 580fe56b9e6SYuval Mintz p_ent->queue = &p_spq->unlimited_pending; 581fe56b9e6SYuval Mintz } else { 582fe56b9e6SYuval Mintz p_ent = list_first_entry(&p_spq->free_pool, 5831a635e48SYuval Mintz struct qed_spq_entry, list); 584fe56b9e6SYuval Mintz list_del(&p_ent->list); 585fe56b9e6SYuval Mintz p_ent->queue = &p_spq->pending; 586fe56b9e6SYuval Mintz } 587fe56b9e6SYuval Mintz 588fe56b9e6SYuval Mintz *pp_ent = p_ent; 589fe56b9e6SYuval Mintz 590fe56b9e6SYuval Mintz out_unlock: 591fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 592fe56b9e6SYuval Mintz return rc; 593fe56b9e6SYuval Mintz } 594fe56b9e6SYuval Mintz 595fe56b9e6SYuval Mintz /* Locked variant; Should be called while the SPQ lock is taken */ 596fe56b9e6SYuval Mintz static void __qed_spq_return_entry(struct qed_hwfn *p_hwfn, 597fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent) 598fe56b9e6SYuval Mintz { 599fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_hwfn->p_spq->free_pool); 600fe56b9e6SYuval Mintz } 601fe56b9e6SYuval Mintz 6021a635e48SYuval Mintz void qed_spq_return_entry(struct qed_hwfn *p_hwfn, struct qed_spq_entry *p_ent) 603fe56b9e6SYuval Mintz { 604fe56b9e6SYuval Mintz spin_lock_bh(&p_hwfn->p_spq->lock); 605fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 606fe56b9e6SYuval Mintz spin_unlock_bh(&p_hwfn->p_spq->lock); 607fe56b9e6SYuval Mintz } 608fe56b9e6SYuval Mintz 609fe56b9e6SYuval Mintz /** 610fe56b9e6SYuval Mintz * @brief qed_spq_add_entry - adds a new entry to the pending 611fe56b9e6SYuval Mintz * list. Should be used while lock is being held. 612fe56b9e6SYuval Mintz * 613fe56b9e6SYuval Mintz * Addes an entry to the pending list is there is room (en empty 614fe56b9e6SYuval Mintz * element is available in the free_pool), or else places the 615fe56b9e6SYuval Mintz * entry in the unlimited_pending pool. 616fe56b9e6SYuval Mintz * 617fe56b9e6SYuval Mintz * @param p_hwfn 618fe56b9e6SYuval Mintz * @param p_ent 619fe56b9e6SYuval Mintz * @param priority 620fe56b9e6SYuval Mintz * 621fe56b9e6SYuval Mintz * @return int 622fe56b9e6SYuval Mintz */ 6231a635e48SYuval Mintz static int qed_spq_add_entry(struct qed_hwfn *p_hwfn, 624fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent, 625fe56b9e6SYuval Mintz enum spq_priority priority) 626fe56b9e6SYuval Mintz { 627fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 628fe56b9e6SYuval Mintz 629fe56b9e6SYuval Mintz if (p_ent->queue == &p_spq->unlimited_pending) { 630fe56b9e6SYuval Mintz 631fe56b9e6SYuval Mintz if (list_empty(&p_spq->free_pool)) { 632fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->unlimited_pending); 633fe56b9e6SYuval Mintz p_spq->unlimited_pending_count++; 634fe56b9e6SYuval Mintz 635fe56b9e6SYuval Mintz return 0; 63676a9a364STomer Tayar } else { 63776a9a364STomer Tayar struct qed_spq_entry *p_en2; 638fe56b9e6SYuval Mintz 639fe56b9e6SYuval Mintz p_en2 = list_first_entry(&p_spq->free_pool, 6401a635e48SYuval Mintz struct qed_spq_entry, list); 641fe56b9e6SYuval Mintz list_del(&p_en2->list); 642fe56b9e6SYuval Mintz 64376a9a364STomer Tayar /* Copy the ring element physical pointer to the new 64476a9a364STomer Tayar * entry, since we are about to override the entire ring 64576a9a364STomer Tayar * entry and don't want to lose the pointer. 64676a9a364STomer Tayar */ 64776a9a364STomer Tayar p_ent->elem.data_ptr = p_en2->elem.data_ptr; 64876a9a364STomer Tayar 649fe56b9e6SYuval Mintz *p_en2 = *p_ent; 650fe56b9e6SYuval Mintz 651db511c37SYuval Mintz /* EBLOCK responsible to free the allocated p_ent */ 652db511c37SYuval Mintz if (p_ent->comp_mode != QED_SPQ_MODE_EBLOCK) 653fe56b9e6SYuval Mintz kfree(p_ent); 654fe56b9e6SYuval Mintz 655fe56b9e6SYuval Mintz p_ent = p_en2; 656fe56b9e6SYuval Mintz } 65776a9a364STomer Tayar } 658fe56b9e6SYuval Mintz 659fe56b9e6SYuval Mintz /* entry is to be placed in 'pending' queue */ 660fe56b9e6SYuval Mintz switch (priority) { 661fe56b9e6SYuval Mintz case QED_SPQ_PRIORITY_NORMAL: 662fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->pending); 663fe56b9e6SYuval Mintz p_spq->normal_count++; 664fe56b9e6SYuval Mintz break; 665fe56b9e6SYuval Mintz case QED_SPQ_PRIORITY_HIGH: 666fe56b9e6SYuval Mintz list_add(&p_ent->list, &p_spq->pending); 667fe56b9e6SYuval Mintz p_spq->high_count++; 668fe56b9e6SYuval Mintz break; 669fe56b9e6SYuval Mintz default: 670fe56b9e6SYuval Mintz return -EINVAL; 671fe56b9e6SYuval Mintz } 672fe56b9e6SYuval Mintz 673fe56b9e6SYuval Mintz return 0; 674fe56b9e6SYuval Mintz } 675fe56b9e6SYuval Mintz 676fe56b9e6SYuval Mintz /*************************************************************************** 677fe56b9e6SYuval Mintz * Accessor 678fe56b9e6SYuval Mintz ***************************************************************************/ 679fe56b9e6SYuval Mintz u32 qed_spq_get_cid(struct qed_hwfn *p_hwfn) 680fe56b9e6SYuval Mintz { 681fe56b9e6SYuval Mintz if (!p_hwfn->p_spq) 682fe56b9e6SYuval Mintz return 0xffffffff; /* illegal */ 683fe56b9e6SYuval Mintz return p_hwfn->p_spq->cid; 684fe56b9e6SYuval Mintz } 685fe56b9e6SYuval Mintz 686fe56b9e6SYuval Mintz /*************************************************************************** 687fe56b9e6SYuval Mintz * Posting new Ramrods 688fe56b9e6SYuval Mintz ***************************************************************************/ 689fe56b9e6SYuval Mintz static int qed_spq_post_list(struct qed_hwfn *p_hwfn, 6901a635e48SYuval Mintz struct list_head *head, u32 keep_reserve) 691fe56b9e6SYuval Mintz { 692fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 693fe56b9e6SYuval Mintz int rc; 694fe56b9e6SYuval Mintz 695fe56b9e6SYuval Mintz while (qed_chain_get_elem_left(&p_spq->chain) > keep_reserve && 696fe56b9e6SYuval Mintz !list_empty(head)) { 697fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = 698fe56b9e6SYuval Mintz list_first_entry(head, struct qed_spq_entry, list); 699fe56b9e6SYuval Mintz list_del(&p_ent->list); 700fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->completion_pending); 701fe56b9e6SYuval Mintz p_spq->comp_sent_count++; 702fe56b9e6SYuval Mintz 703fe56b9e6SYuval Mintz rc = qed_spq_hw_post(p_hwfn, p_spq, p_ent); 704fe56b9e6SYuval Mintz if (rc) { 705fe56b9e6SYuval Mintz list_del(&p_ent->list); 706fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 707fe56b9e6SYuval Mintz return rc; 708fe56b9e6SYuval Mintz } 709fe56b9e6SYuval Mintz } 710fe56b9e6SYuval Mintz 711fe56b9e6SYuval Mintz return 0; 712fe56b9e6SYuval Mintz } 713fe56b9e6SYuval Mintz 714fe56b9e6SYuval Mintz static int qed_spq_pend_post(struct qed_hwfn *p_hwfn) 715fe56b9e6SYuval Mintz { 716fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 717fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 718fe56b9e6SYuval Mintz 719fe56b9e6SYuval Mintz while (!list_empty(&p_spq->free_pool)) { 720fe56b9e6SYuval Mintz if (list_empty(&p_spq->unlimited_pending)) 721fe56b9e6SYuval Mintz break; 722fe56b9e6SYuval Mintz 723fe56b9e6SYuval Mintz p_ent = list_first_entry(&p_spq->unlimited_pending, 7241a635e48SYuval Mintz struct qed_spq_entry, list); 725fe56b9e6SYuval Mintz if (!p_ent) 726fe56b9e6SYuval Mintz return -EINVAL; 727fe56b9e6SYuval Mintz 728fe56b9e6SYuval Mintz list_del(&p_ent->list); 729fe56b9e6SYuval Mintz 730fe56b9e6SYuval Mintz qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); 731fe56b9e6SYuval Mintz } 732fe56b9e6SYuval Mintz 733fe56b9e6SYuval Mintz return qed_spq_post_list(p_hwfn, &p_spq->pending, 734fe56b9e6SYuval Mintz SPQ_HIGH_PRI_RESERVE_DEFAULT); 735fe56b9e6SYuval Mintz } 736fe56b9e6SYuval Mintz 737fe56b9e6SYuval Mintz int qed_spq_post(struct qed_hwfn *p_hwfn, 7381a635e48SYuval Mintz struct qed_spq_entry *p_ent, u8 *fw_return_code) 739fe56b9e6SYuval Mintz { 740fe56b9e6SYuval Mintz int rc = 0; 741fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn ? p_hwfn->p_spq : NULL; 742fe56b9e6SYuval Mintz bool b_ret_ent = true; 743fe56b9e6SYuval Mintz 744fe56b9e6SYuval Mintz if (!p_hwfn) 745fe56b9e6SYuval Mintz return -EINVAL; 746fe56b9e6SYuval Mintz 747fe56b9e6SYuval Mintz if (!p_ent) { 748fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Got a NULL pointer\n"); 749fe56b9e6SYuval Mintz return -EINVAL; 750fe56b9e6SYuval Mintz } 751fe56b9e6SYuval Mintz 752fe56b9e6SYuval Mintz /* Complete the entry */ 753fe56b9e6SYuval Mintz rc = qed_spq_fill_entry(p_hwfn, p_ent); 754fe56b9e6SYuval Mintz 755fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 756fe56b9e6SYuval Mintz 757fe56b9e6SYuval Mintz /* Check return value after LOCK is taken for cleaner error flow */ 758fe56b9e6SYuval Mintz if (rc) 759fe56b9e6SYuval Mintz goto spq_post_fail; 760fe56b9e6SYuval Mintz 761fe56b9e6SYuval Mintz /* Add the request to the pending queue */ 762fe56b9e6SYuval Mintz rc = qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); 763fe56b9e6SYuval Mintz if (rc) 764fe56b9e6SYuval Mintz goto spq_post_fail; 765fe56b9e6SYuval Mintz 766fe56b9e6SYuval Mintz rc = qed_spq_pend_post(p_hwfn); 767fe56b9e6SYuval Mintz if (rc) { 768fe56b9e6SYuval Mintz /* Since it's possible that pending failed for a different 769fe56b9e6SYuval Mintz * entry [although unlikely], the failed entry was already 770fe56b9e6SYuval Mintz * dealt with; No need to return it here. 771fe56b9e6SYuval Mintz */ 772fe56b9e6SYuval Mintz b_ret_ent = false; 773fe56b9e6SYuval Mintz goto spq_post_fail; 774fe56b9e6SYuval Mintz } 775fe56b9e6SYuval Mintz 776fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 777fe56b9e6SYuval Mintz 778fe56b9e6SYuval Mintz if (p_ent->comp_mode == QED_SPQ_MODE_EBLOCK) { 779fe56b9e6SYuval Mintz /* For entries in QED BLOCK mode, the completion code cannot 780fe56b9e6SYuval Mintz * perform the necessary cleanup - if it did, we couldn't 781fe56b9e6SYuval Mintz * access p_ent here to see whether it's successful or not. 782fe56b9e6SYuval Mintz * Thus, after gaining the answer perform the cleanup here. 783fe56b9e6SYuval Mintz */ 784c59f5291SYuval Mintz rc = qed_spq_block(p_hwfn, p_ent, fw_return_code, 785c59f5291SYuval Mintz p_ent->queue == &p_spq->unlimited_pending); 786db511c37SYuval Mintz 787db511c37SYuval Mintz if (p_ent->queue == &p_spq->unlimited_pending) { 788db511c37SYuval Mintz /* This is an allocated p_ent which does not need to 789db511c37SYuval Mintz * return to pool. 790db511c37SYuval Mintz */ 791db511c37SYuval Mintz kfree(p_ent); 792db511c37SYuval Mintz return rc; 793db511c37SYuval Mintz } 794db511c37SYuval Mintz 795fe56b9e6SYuval Mintz if (rc) 796fe56b9e6SYuval Mintz goto spq_post_fail2; 797fe56b9e6SYuval Mintz 798fe56b9e6SYuval Mintz /* return to pool */ 799fe56b9e6SYuval Mintz qed_spq_return_entry(p_hwfn, p_ent); 800fe56b9e6SYuval Mintz } 801fe56b9e6SYuval Mintz return rc; 802fe56b9e6SYuval Mintz 803fe56b9e6SYuval Mintz spq_post_fail2: 804fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 805fe56b9e6SYuval Mintz list_del(&p_ent->list); 806fe56b9e6SYuval Mintz qed_chain_return_produced(&p_spq->chain); 807fe56b9e6SYuval Mintz 808fe56b9e6SYuval Mintz spq_post_fail: 809fe56b9e6SYuval Mintz /* return to the free pool */ 810fe56b9e6SYuval Mintz if (b_ret_ent) 811fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 812fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 813fe56b9e6SYuval Mintz 814fe56b9e6SYuval Mintz return rc; 815fe56b9e6SYuval Mintz } 816fe56b9e6SYuval Mintz 817fe56b9e6SYuval Mintz int qed_spq_completion(struct qed_hwfn *p_hwfn, 818fe56b9e6SYuval Mintz __le16 echo, 819fe56b9e6SYuval Mintz u8 fw_return_code, 820fe56b9e6SYuval Mintz union event_ring_data *p_data) 821fe56b9e6SYuval Mintz { 822fe56b9e6SYuval Mintz struct qed_spq *p_spq; 823fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 824fe56b9e6SYuval Mintz struct qed_spq_entry *tmp; 825fe56b9e6SYuval Mintz struct qed_spq_entry *found = NULL; 826fe56b9e6SYuval Mintz int rc; 827fe56b9e6SYuval Mintz 828fe56b9e6SYuval Mintz if (!p_hwfn) 829fe56b9e6SYuval Mintz return -EINVAL; 830fe56b9e6SYuval Mintz 831fe56b9e6SYuval Mintz p_spq = p_hwfn->p_spq; 832fe56b9e6SYuval Mintz if (!p_spq) 833fe56b9e6SYuval Mintz return -EINVAL; 834fe56b9e6SYuval Mintz 835fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 8361a635e48SYuval Mintz list_for_each_entry_safe(p_ent, tmp, &p_spq->completion_pending, list) { 837fe56b9e6SYuval Mintz if (p_ent->elem.hdr.echo == echo) { 83876a9a364STomer Tayar u16 pos = le16_to_cpu(echo) % SPQ_RING_SIZE; 83976a9a364STomer Tayar 840fe56b9e6SYuval Mintz list_del(&p_ent->list); 841fe56b9e6SYuval Mintz 84276a9a364STomer Tayar /* Avoid overriding of SPQ entries when getting 84376a9a364STomer Tayar * out-of-order completions, by marking the completions 84476a9a364STomer Tayar * in a bitmap and increasing the chain consumer only 84576a9a364STomer Tayar * for the first successive completed entries. 84676a9a364STomer Tayar */ 84759d3f1ceSManish Chopra __set_bit(pos, p_spq->p_comp_bitmap); 84876a9a364STomer Tayar 84976a9a364STomer Tayar while (test_bit(p_spq->comp_bitmap_idx, 85076a9a364STomer Tayar p_spq->p_comp_bitmap)) { 85159d3f1ceSManish Chopra __clear_bit(p_spq->comp_bitmap_idx, 85259d3f1ceSManish Chopra p_spq->p_comp_bitmap); 85376a9a364STomer Tayar p_spq->comp_bitmap_idx++; 854fe56b9e6SYuval Mintz qed_chain_return_produced(&p_spq->chain); 85576a9a364STomer Tayar } 85676a9a364STomer Tayar 857fe56b9e6SYuval Mintz p_spq->comp_count++; 858fe56b9e6SYuval Mintz found = p_ent; 859fe56b9e6SYuval Mintz break; 860fe56b9e6SYuval Mintz } 86176a9a364STomer Tayar 86276a9a364STomer Tayar /* This is relatively uncommon - depends on scenarios 86376a9a364STomer Tayar * which have mutliple per-PF sent ramrods. 86476a9a364STomer Tayar */ 86576a9a364STomer Tayar DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 86676a9a364STomer Tayar "Got completion for echo %04x - doesn't match echo %04x in completion pending list\n", 86776a9a364STomer Tayar le16_to_cpu(echo), 86876a9a364STomer Tayar le16_to_cpu(p_ent->elem.hdr.echo)); 869fe56b9e6SYuval Mintz } 870fe56b9e6SYuval Mintz 871fe56b9e6SYuval Mintz /* Release lock before callback, as callback may post 872fe56b9e6SYuval Mintz * an additional ramrod. 873fe56b9e6SYuval Mintz */ 874fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 875fe56b9e6SYuval Mintz 876fe56b9e6SYuval Mintz if (!found) { 877fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, 878525ef5c0SYuval Mintz "Failed to find an entry this EQE [echo %04x] completes\n", 879525ef5c0SYuval Mintz le16_to_cpu(echo)); 880fe56b9e6SYuval Mintz return -EEXIST; 881fe56b9e6SYuval Mintz } 882fe56b9e6SYuval Mintz 883525ef5c0SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 884525ef5c0SYuval Mintz "Complete EQE [echo %04x]: func %p cookie %p)\n", 885525ef5c0SYuval Mintz le16_to_cpu(echo), 886fe56b9e6SYuval Mintz p_ent->comp_cb.function, p_ent->comp_cb.cookie); 887fe56b9e6SYuval Mintz if (found->comp_cb.function) 888fe56b9e6SYuval Mintz found->comp_cb.function(p_hwfn, found->comp_cb.cookie, p_data, 889fe56b9e6SYuval Mintz fw_return_code); 890525ef5c0SYuval Mintz else 891525ef5c0SYuval Mintz DP_VERBOSE(p_hwfn, 892525ef5c0SYuval Mintz QED_MSG_SPQ, 893525ef5c0SYuval Mintz "Got a completion without a callback function\n"); 894fe56b9e6SYuval Mintz 895db511c37SYuval Mintz if ((found->comp_mode != QED_SPQ_MODE_EBLOCK) || 896db511c37SYuval Mintz (found->queue == &p_spq->unlimited_pending)) 897db511c37SYuval Mintz /* EBLOCK is responsible for returning its own entry into the 898db511c37SYuval Mintz * free list, unless it originally added the entry into the 899db511c37SYuval Mintz * unlimited pending list. 900db511c37SYuval Mintz */ 901fe56b9e6SYuval Mintz qed_spq_return_entry(p_hwfn, found); 902fe56b9e6SYuval Mintz 903fe56b9e6SYuval Mintz /* Attempt to post pending requests */ 904fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 905fe56b9e6SYuval Mintz rc = qed_spq_pend_post(p_hwfn); 906fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 907fe56b9e6SYuval Mintz 908fe56b9e6SYuval Mintz return rc; 909fe56b9e6SYuval Mintz } 910fe56b9e6SYuval Mintz 911fe56b9e6SYuval Mintz struct qed_consq *qed_consq_alloc(struct qed_hwfn *p_hwfn) 912fe56b9e6SYuval Mintz { 913fe56b9e6SYuval Mintz struct qed_consq *p_consq; 914fe56b9e6SYuval Mintz 915fe56b9e6SYuval Mintz /* Allocate ConsQ struct */ 91660fffb3bSYuval Mintz p_consq = kzalloc(sizeof(*p_consq), GFP_KERNEL); 9172591c280SJoe Perches if (!p_consq) 918fe56b9e6SYuval Mintz return NULL; 919fe56b9e6SYuval Mintz 920fe56b9e6SYuval Mintz /* Allocate and initialize EQ chain*/ 921fe56b9e6SYuval Mintz if (qed_chain_alloc(p_hwfn->cdev, 922fe56b9e6SYuval Mintz QED_CHAIN_USE_TO_PRODUCE, 923fe56b9e6SYuval Mintz QED_CHAIN_MODE_PBL, 924a91eb52aSYuval Mintz QED_CHAIN_CNT_TYPE_U16, 925fe56b9e6SYuval Mintz QED_CHAIN_PAGE_SIZE / 0x80, 9262591c280SJoe Perches 0x80, &p_consq->chain)) 927fe56b9e6SYuval Mintz goto consq_allocate_fail; 928fe56b9e6SYuval Mintz 929fe56b9e6SYuval Mintz return p_consq; 930fe56b9e6SYuval Mintz 931fe56b9e6SYuval Mintz consq_allocate_fail: 932fe56b9e6SYuval Mintz qed_consq_free(p_hwfn, p_consq); 933fe56b9e6SYuval Mintz return NULL; 934fe56b9e6SYuval Mintz } 935fe56b9e6SYuval Mintz 9361a635e48SYuval Mintz void qed_consq_setup(struct qed_hwfn *p_hwfn, struct qed_consq *p_consq) 937fe56b9e6SYuval Mintz { 938fe56b9e6SYuval Mintz qed_chain_reset(&p_consq->chain); 939fe56b9e6SYuval Mintz } 940fe56b9e6SYuval Mintz 9411a635e48SYuval Mintz void qed_consq_free(struct qed_hwfn *p_hwfn, struct qed_consq *p_consq) 942fe56b9e6SYuval Mintz { 943fe56b9e6SYuval Mintz if (!p_consq) 944fe56b9e6SYuval Mintz return; 945fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_consq->chain); 946fe56b9e6SYuval Mintz kfree(p_consq); 947fe56b9e6SYuval Mintz } 948