11f4d4ed6SAlexander Lobakin // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) 2fe56b9e6SYuval Mintz /* QLogic qed NIC Driver 3e8f1cb50SMintz, Yuval * Copyright (c) 2015-2017 QLogic Corporation 4fe56b9e6SYuval Mintz */ 5fe56b9e6SYuval Mintz 6fe56b9e6SYuval Mintz #include <linux/types.h> 7fe56b9e6SYuval Mintz #include <asm/byteorder.h> 8fe56b9e6SYuval Mintz #include <linux/io.h> 9fe56b9e6SYuval Mintz #include <linux/delay.h> 10fe56b9e6SYuval Mintz #include <linux/dma-mapping.h> 11fe56b9e6SYuval Mintz #include <linux/errno.h> 12fe56b9e6SYuval Mintz #include <linux/kernel.h> 13fe56b9e6SYuval Mintz #include <linux/list.h> 14fe56b9e6SYuval Mintz #include <linux/pci.h> 15fe56b9e6SYuval Mintz #include <linux/slab.h> 16fe56b9e6SYuval Mintz #include <linux/spinlock.h> 17fe56b9e6SYuval Mintz #include <linux/string.h> 18fe56b9e6SYuval Mintz #include "qed.h" 19fe56b9e6SYuval Mintz #include "qed_cxt.h" 20fe56b9e6SYuval Mintz #include "qed_dev_api.h" 21fe56b9e6SYuval Mintz #include "qed_hsi.h" 22fe56b9e6SYuval Mintz #include "qed_hw.h" 23fe56b9e6SYuval Mintz #include "qed_int.h" 24fc831825SYuval Mintz #include "qed_iscsi.h" 25fe56b9e6SYuval Mintz #include "qed_mcp.h" 261d6cff4fSYuval Mintz #include "qed_ooo.h" 27fe56b9e6SYuval Mintz #include "qed_reg_addr.h" 28fe56b9e6SYuval Mintz #include "qed_sp.h" 2937bff2b9SYuval Mintz #include "qed_sriov.h" 30b71b9afdSKalderon, Michal #include "qed_rdma.h" 31fe56b9e6SYuval Mintz 32fe56b9e6SYuval Mintz /*************************************************************************** 33fe56b9e6SYuval Mintz * Structures & Definitions 34fe56b9e6SYuval Mintz ***************************************************************************/ 35fe56b9e6SYuval Mintz 36fe56b9e6SYuval Mintz #define SPQ_HIGH_PRI_RESERVE_DEFAULT (1) 37c59f5291SYuval Mintz 38c59f5291SYuval Mintz #define SPQ_BLOCK_DELAY_MAX_ITER (10) 39c59f5291SYuval Mintz #define SPQ_BLOCK_DELAY_US (10) 40c59f5291SYuval Mintz #define SPQ_BLOCK_SLEEP_MAX_ITER (1000) 41c59f5291SYuval Mintz #define SPQ_BLOCK_SLEEP_MS (5) 42fe56b9e6SYuval Mintz 43fe56b9e6SYuval Mintz /*************************************************************************** 44fe56b9e6SYuval Mintz * Blocking Imp. (BLOCK/EBLOCK mode) 45fe56b9e6SYuval Mintz ***************************************************************************/ 46fe56b9e6SYuval Mintz static void qed_spq_blocking_cb(struct qed_hwfn *p_hwfn, 47fe56b9e6SYuval Mintz void *cookie, 481a635e48SYuval Mintz union event_ring_data *data, u8 fw_return_code) 49fe56b9e6SYuval Mintz { 50fe56b9e6SYuval Mintz struct qed_spq_comp_done *comp_done; 51fe56b9e6SYuval Mintz 52fe56b9e6SYuval Mintz comp_done = (struct qed_spq_comp_done *)cookie; 53fe56b9e6SYuval Mintz 54fe56b9e6SYuval Mintz comp_done->fw_return_code = fw_return_code; 55fe56b9e6SYuval Mintz 56d5df7688SManish Chopra /* Make sure completion done is visible on waiting thread */ 57d5df7688SManish Chopra smp_store_release(&comp_done->done, 0x1); 58fe56b9e6SYuval Mintz } 59fe56b9e6SYuval Mintz 60c59f5291SYuval Mintz static int __qed_spq_block(struct qed_hwfn *p_hwfn, 61c59f5291SYuval Mintz struct qed_spq_entry *p_ent, 62c59f5291SYuval Mintz u8 *p_fw_ret, bool sleep_between_iter) 63c59f5291SYuval Mintz { 64c59f5291SYuval Mintz struct qed_spq_comp_done *comp_done; 65c59f5291SYuval Mintz u32 iter_cnt; 66c59f5291SYuval Mintz 67c59f5291SYuval Mintz comp_done = (struct qed_spq_comp_done *)p_ent->comp_cb.cookie; 68c59f5291SYuval Mintz iter_cnt = sleep_between_iter ? SPQ_BLOCK_SLEEP_MAX_ITER 69c59f5291SYuval Mintz : SPQ_BLOCK_DELAY_MAX_ITER; 70c59f5291SYuval Mintz 71c59f5291SYuval Mintz while (iter_cnt--) { 72c59f5291SYuval Mintz /* Validate we receive completion update */ 73cb7e125eSPaul E. McKenney if (smp_load_acquire(&comp_done->done) == 1) { /* ^^^ */ 74c59f5291SYuval Mintz if (p_fw_ret) 75c59f5291SYuval Mintz *p_fw_ret = comp_done->fw_return_code; 76c59f5291SYuval Mintz return 0; 77c59f5291SYuval Mintz } 78c59f5291SYuval Mintz 79c59f5291SYuval Mintz if (sleep_between_iter) 80c59f5291SYuval Mintz msleep(SPQ_BLOCK_SLEEP_MS); 81c59f5291SYuval Mintz else 82c59f5291SYuval Mintz udelay(SPQ_BLOCK_DELAY_US); 83c59f5291SYuval Mintz } 84c59f5291SYuval Mintz 85c59f5291SYuval Mintz return -EBUSY; 86c59f5291SYuval Mintz } 87c59f5291SYuval Mintz 88fe56b9e6SYuval Mintz static int qed_spq_block(struct qed_hwfn *p_hwfn, 89fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent, 90c59f5291SYuval Mintz u8 *p_fw_ret, bool skip_quick_poll) 91fe56b9e6SYuval Mintz { 92fe56b9e6SYuval Mintz struct qed_spq_comp_done *comp_done; 9315582962SRahul Verma struct qed_ptt *p_ptt; 94fe56b9e6SYuval Mintz int rc; 95fe56b9e6SYuval Mintz 96c59f5291SYuval Mintz /* A relatively short polling period w/o sleeping, to allow the FW to 97c59f5291SYuval Mintz * complete the ramrod and thus possibly to avoid the following sleeps. 98c59f5291SYuval Mintz */ 99c59f5291SYuval Mintz if (!skip_quick_poll) { 100c59f5291SYuval Mintz rc = __qed_spq_block(p_hwfn, p_ent, p_fw_ret, false); 101c59f5291SYuval Mintz if (!rc) 102fe56b9e6SYuval Mintz return 0; 103fe56b9e6SYuval Mintz } 104c59f5291SYuval Mintz 105c59f5291SYuval Mintz /* Move to polling with a sleeping period between iterations */ 106c59f5291SYuval Mintz rc = __qed_spq_block(p_hwfn, p_ent, p_fw_ret, true); 107c59f5291SYuval Mintz if (!rc) 108c59f5291SYuval Mintz return 0; 109fe56b9e6SYuval Mintz 11015582962SRahul Verma p_ptt = qed_ptt_acquire(p_hwfn); 11115582962SRahul Verma if (!p_ptt) { 11215582962SRahul Verma DP_NOTICE(p_hwfn, "ptt, failed to acquire\n"); 11315582962SRahul Verma return -EAGAIN; 11415582962SRahul Verma } 11515582962SRahul Verma 116fe56b9e6SYuval Mintz DP_INFO(p_hwfn, "Ramrod is stuck, requesting MCP drain\n"); 11715582962SRahul Verma rc = qed_mcp_drain(p_hwfn, p_ptt); 118fa5c448dSSagiv Ozeri qed_ptt_release(p_hwfn, p_ptt); 119c59f5291SYuval Mintz if (rc) { 120fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "MCP drain failed\n"); 121c59f5291SYuval Mintz goto err; 122c59f5291SYuval Mintz } 123fe56b9e6SYuval Mintz 124fe56b9e6SYuval Mintz /* Retry after drain */ 125c59f5291SYuval Mintz rc = __qed_spq_block(p_hwfn, p_ent, p_fw_ret, true); 126c59f5291SYuval Mintz if (!rc) 127fe56b9e6SYuval Mintz return 0; 12815582962SRahul Verma 129fa5c448dSSagiv Ozeri comp_done = (struct qed_spq_comp_done *)p_ent->comp_cb.cookie; 130fa5c448dSSagiv Ozeri if (comp_done->done == 1) { 131fa5c448dSSagiv Ozeri if (p_fw_ret) 132fa5c448dSSagiv Ozeri *p_fw_ret = comp_done->fw_return_code; 133fa5c448dSSagiv Ozeri return 0; 134fa5c448dSSagiv Ozeri } 135c59f5291SYuval Mintz err: 1362ec276d5SIgor Russkikh p_ptt = qed_ptt_acquire(p_hwfn); 1372ec276d5SIgor Russkikh if (!p_ptt) 1382ec276d5SIgor Russkikh return -EBUSY; 1392ec276d5SIgor Russkikh qed_hw_err_notify(p_hwfn, p_ptt, QED_HW_ERR_RAMROD_FAIL, 140c59f5291SYuval Mintz "Ramrod is stuck [CID %08x cmd %02x protocol %02x echo %04x]\n", 141c59f5291SYuval Mintz le32_to_cpu(p_ent->elem.hdr.cid), 142c59f5291SYuval Mintz p_ent->elem.hdr.cmd_id, 143c59f5291SYuval Mintz p_ent->elem.hdr.protocol_id, 144c59f5291SYuval Mintz le16_to_cpu(p_ent->elem.hdr.echo)); 1452ec276d5SIgor Russkikh qed_ptt_release(p_hwfn, p_ptt); 146fe56b9e6SYuval Mintz 147fe56b9e6SYuval Mintz return -EBUSY; 148fe56b9e6SYuval Mintz } 149fe56b9e6SYuval Mintz 150fe56b9e6SYuval Mintz /*************************************************************************** 151fe56b9e6SYuval Mintz * SPQ entries inner API 152fe56b9e6SYuval Mintz ***************************************************************************/ 1531a635e48SYuval Mintz static int qed_spq_fill_entry(struct qed_hwfn *p_hwfn, 154fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent) 155fe56b9e6SYuval Mintz { 156fe56b9e6SYuval Mintz p_ent->flags = 0; 157fe56b9e6SYuval Mintz 158fe56b9e6SYuval Mintz switch (p_ent->comp_mode) { 159fe56b9e6SYuval Mintz case QED_SPQ_MODE_EBLOCK: 160fe56b9e6SYuval Mintz case QED_SPQ_MODE_BLOCK: 161fe56b9e6SYuval Mintz p_ent->comp_cb.function = qed_spq_blocking_cb; 162fe56b9e6SYuval Mintz break; 163fe56b9e6SYuval Mintz case QED_SPQ_MODE_CB: 164fe56b9e6SYuval Mintz break; 165fe56b9e6SYuval Mintz default: 166fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Unknown SPQE completion mode %d\n", 167fe56b9e6SYuval Mintz p_ent->comp_mode); 168fe56b9e6SYuval Mintz return -EINVAL; 169fe56b9e6SYuval Mintz } 170fe56b9e6SYuval Mintz 171fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 172fe56b9e6SYuval Mintz "Ramrod header: [CID 0x%08x CMD 0x%02x protocol 0x%02x] Data pointer: [%08x:%08x] Completion Mode: %s\n", 173fe56b9e6SYuval Mintz p_ent->elem.hdr.cid, 174fe56b9e6SYuval Mintz p_ent->elem.hdr.cmd_id, 175fe56b9e6SYuval Mintz p_ent->elem.hdr.protocol_id, 176fe56b9e6SYuval Mintz p_ent->elem.data_ptr.hi, 177fe56b9e6SYuval Mintz p_ent->elem.data_ptr.lo, 178fe56b9e6SYuval Mintz D_TRINE(p_ent->comp_mode, QED_SPQ_MODE_EBLOCK, 179fe56b9e6SYuval Mintz QED_SPQ_MODE_BLOCK, "MODE_EBLOCK", "MODE_BLOCK", 180fe56b9e6SYuval Mintz "MODE_CB")); 181fe56b9e6SYuval Mintz 182fe56b9e6SYuval Mintz return 0; 183fe56b9e6SYuval Mintz } 184fe56b9e6SYuval Mintz 185fe56b9e6SYuval Mintz /*************************************************************************** 186fe56b9e6SYuval Mintz * HSI access 187fe56b9e6SYuval Mintz ***************************************************************************/ 188fe56b9e6SYuval Mintz static void qed_spq_hw_initialize(struct qed_hwfn *p_hwfn, 189fe56b9e6SYuval Mintz struct qed_spq *p_spq) 190fe56b9e6SYuval Mintz { 19121dd79e8STomer Tayar struct e4_core_conn_context *p_cxt; 192b5a9ee7cSAriel Elior struct qed_cxt_info cxt_info; 193b5a9ee7cSAriel Elior u16 physical_q; 194fe56b9e6SYuval Mintz int rc; 195fe56b9e6SYuval Mintz 196fe56b9e6SYuval Mintz cxt_info.iid = p_spq->cid; 197fe56b9e6SYuval Mintz 198fe56b9e6SYuval Mintz rc = qed_cxt_get_cid_info(p_hwfn, &cxt_info); 199fe56b9e6SYuval Mintz 200fe56b9e6SYuval Mintz if (rc < 0) { 201fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Cannot find context info for cid=%d\n", 202fe56b9e6SYuval Mintz p_spq->cid); 203fe56b9e6SYuval Mintz return; 204fe56b9e6SYuval Mintz } 205fe56b9e6SYuval Mintz 206fe56b9e6SYuval Mintz p_cxt = cxt_info.p_cxt; 207fe56b9e6SYuval Mintz 208fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags10, 20921dd79e8STomer Tayar E4_XSTORM_CORE_CONN_AG_CTX_DQ_CF_EN, 1); 210fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags1, 21121dd79e8STomer Tayar E4_XSTORM_CORE_CONN_AG_CTX_DQ_CF_ACTIVE, 1); 212fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags9, 21321dd79e8STomer Tayar E4_XSTORM_CORE_CONN_AG_CTX_CONSOLID_PROD_CF_EN, 1); 214fe56b9e6SYuval Mintz 215fe56b9e6SYuval Mintz /* QM physical queue */ 216b5a9ee7cSAriel Elior physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB); 217b5a9ee7cSAriel Elior p_cxt->xstorm_ag_context.physical_q0 = cpu_to_le16(physical_q); 218fe56b9e6SYuval Mintz 219fe56b9e6SYuval Mintz p_cxt->xstorm_st_context.spq_base_lo = 220fe56b9e6SYuval Mintz DMA_LO_LE(p_spq->chain.p_phys_addr); 221fe56b9e6SYuval Mintz p_cxt->xstorm_st_context.spq_base_hi = 222fe56b9e6SYuval Mintz DMA_HI_LE(p_spq->chain.p_phys_addr); 223fe56b9e6SYuval Mintz 22494494598SYuval Mintz DMA_REGPAIR_LE(p_cxt->xstorm_st_context.consolid_base_addr, 22594494598SYuval Mintz p_hwfn->p_consq->chain.p_phys_addr); 226fe56b9e6SYuval Mintz } 227fe56b9e6SYuval Mintz 228fe56b9e6SYuval Mintz static int qed_spq_hw_post(struct qed_hwfn *p_hwfn, 2291a635e48SYuval Mintz struct qed_spq *p_spq, struct qed_spq_entry *p_ent) 230fe56b9e6SYuval Mintz { 231fe56b9e6SYuval Mintz struct qed_chain *p_chain = &p_hwfn->p_spq->chain; 2329ecd8c3fSAriel Elior struct core_db_data *p_db_data = &p_spq->db_data; 23376a9a364STomer Tayar u16 echo = qed_chain_get_prod_idx(p_chain); 234fe56b9e6SYuval Mintz struct slow_path_element *elem; 235fe56b9e6SYuval Mintz 23676a9a364STomer Tayar p_ent->elem.hdr.echo = cpu_to_le16(echo); 237fe56b9e6SYuval Mintz elem = qed_chain_produce(p_chain); 238fe56b9e6SYuval Mintz if (!elem) { 239fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Failed to produce from SPQ chain\n"); 240fe56b9e6SYuval Mintz return -EINVAL; 241fe56b9e6SYuval Mintz } 242fe56b9e6SYuval Mintz 243fe56b9e6SYuval Mintz *elem = p_ent->elem; /* struct assignment */ 244fe56b9e6SYuval Mintz 245fe56b9e6SYuval Mintz /* send a doorbell on the slow hwfn session */ 2469ecd8c3fSAriel Elior p_db_data->spq_prod = cpu_to_le16(qed_chain_get_prod_idx(p_chain)); 247fe56b9e6SYuval Mintz 24834c7bb47SSudarsana Reddy Kalluru /* make sure the SPQE is updated before the doorbell */ 24934c7bb47SSudarsana Reddy Kalluru wmb(); 250fe56b9e6SYuval Mintz 2519ecd8c3fSAriel Elior DOORBELL(p_hwfn, p_spq->db_addr_offset, *(u32 *)p_db_data); 252fe56b9e6SYuval Mintz 253fe56b9e6SYuval Mintz /* make sure doorbell is rang */ 25434c7bb47SSudarsana Reddy Kalluru wmb(); 255fe56b9e6SYuval Mintz 256fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 257fe56b9e6SYuval Mintz "Doorbelled [0x%08x, CID 0x%08x] with Flags: %02x agg_params: %02x, prod: %04x\n", 2589ecd8c3fSAriel Elior p_spq->db_addr_offset, 2599ecd8c3fSAriel Elior p_spq->cid, 2609ecd8c3fSAriel Elior p_db_data->params, 2619ecd8c3fSAriel Elior p_db_data->agg_flags, qed_chain_get_prod_idx(p_chain)); 262fe56b9e6SYuval Mintz 263fe56b9e6SYuval Mintz return 0; 264fe56b9e6SYuval Mintz } 265fe56b9e6SYuval Mintz 266fe56b9e6SYuval Mintz /*************************************************************************** 267fe56b9e6SYuval Mintz * Asynchronous events 268fe56b9e6SYuval Mintz ***************************************************************************/ 269fe56b9e6SYuval Mintz static int 270fe56b9e6SYuval Mintz qed_async_event_completion(struct qed_hwfn *p_hwfn, 271fe56b9e6SYuval Mintz struct event_ring_entry *p_eqe) 272fe56b9e6SYuval Mintz { 2736c9e80eaSMichal Kalderon qed_spq_async_comp_cb cb; 2746c9e80eaSMichal Kalderon 2756c9e80eaSMichal Kalderon if (!p_hwfn->p_spq || (p_eqe->protocol_id >= MAX_PROTOCOL_TYPE)) 276fc831825SYuval Mintz return -EINVAL; 277fc831825SYuval Mintz 2786c9e80eaSMichal Kalderon cb = p_hwfn->p_spq->async_comp_cb[p_eqe->protocol_id]; 2796c9e80eaSMichal Kalderon if (cb) { 2806c9e80eaSMichal Kalderon return cb(p_hwfn, p_eqe->opcode, p_eqe->echo, 2816c9e80eaSMichal Kalderon &p_eqe->data, p_eqe->fw_return_code); 282fc831825SYuval Mintz } else { 283fc831825SYuval Mintz DP_NOTICE(p_hwfn, 284fe56b9e6SYuval Mintz "Unknown Async completion for protocol: %d\n", 285fe56b9e6SYuval Mintz p_eqe->protocol_id); 286fe56b9e6SYuval Mintz return -EINVAL; 287fe56b9e6SYuval Mintz } 28837bff2b9SYuval Mintz } 289fe56b9e6SYuval Mintz 2906c9e80eaSMichal Kalderon int 2916c9e80eaSMichal Kalderon qed_spq_register_async_cb(struct qed_hwfn *p_hwfn, 2926c9e80eaSMichal Kalderon enum protocol_type protocol_id, 2936c9e80eaSMichal Kalderon qed_spq_async_comp_cb cb) 2946c9e80eaSMichal Kalderon { 2956c9e80eaSMichal Kalderon if (!p_hwfn->p_spq || (protocol_id >= MAX_PROTOCOL_TYPE)) 2966c9e80eaSMichal Kalderon return -EINVAL; 2976c9e80eaSMichal Kalderon 2986c9e80eaSMichal Kalderon p_hwfn->p_spq->async_comp_cb[protocol_id] = cb; 2996c9e80eaSMichal Kalderon return 0; 3006c9e80eaSMichal Kalderon } 3016c9e80eaSMichal Kalderon 3026c9e80eaSMichal Kalderon void 3036c9e80eaSMichal Kalderon qed_spq_unregister_async_cb(struct qed_hwfn *p_hwfn, 3046c9e80eaSMichal Kalderon enum protocol_type protocol_id) 3056c9e80eaSMichal Kalderon { 3066c9e80eaSMichal Kalderon if (!p_hwfn->p_spq || (protocol_id >= MAX_PROTOCOL_TYPE)) 3076c9e80eaSMichal Kalderon return; 3086c9e80eaSMichal Kalderon 3096c9e80eaSMichal Kalderon p_hwfn->p_spq->async_comp_cb[protocol_id] = NULL; 3106c9e80eaSMichal Kalderon } 3116c9e80eaSMichal Kalderon 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 3231a635e48SYuval Mintz int qed_eq_completion(struct qed_hwfn *p_hwfn, void *cookie) 324fe56b9e6SYuval Mintz { 325fe56b9e6SYuval Mintz struct qed_eq *p_eq = cookie; 326fe56b9e6SYuval Mintz struct qed_chain *p_chain = &p_eq->chain; 327fe56b9e6SYuval Mintz int rc = 0; 328fe56b9e6SYuval Mintz 329fe56b9e6SYuval Mintz /* take a snapshot of the FW consumer */ 330fe56b9e6SYuval Mintz u16 fw_cons_idx = le16_to_cpu(*p_eq->p_fw_cons); 331fe56b9e6SYuval Mintz 332fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, "fw_cons_idx %x\n", fw_cons_idx); 333fe56b9e6SYuval Mintz 334fe56b9e6SYuval Mintz /* Need to guarantee the fw_cons index we use points to a usuable 335fe56b9e6SYuval Mintz * element (to comply with our chain), so our macros would comply 336fe56b9e6SYuval Mintz */ 337fe56b9e6SYuval Mintz if ((fw_cons_idx & qed_chain_get_usable_per_page(p_chain)) == 338fe56b9e6SYuval Mintz qed_chain_get_usable_per_page(p_chain)) 339fe56b9e6SYuval Mintz fw_cons_idx += qed_chain_get_unusable_per_page(p_chain); 340fe56b9e6SYuval Mintz 341fe56b9e6SYuval Mintz /* Complete current segment of eq entries */ 342fe56b9e6SYuval Mintz while (fw_cons_idx != qed_chain_get_cons_idx(p_chain)) { 343fe56b9e6SYuval Mintz struct event_ring_entry *p_eqe = qed_chain_consume(p_chain); 344fe56b9e6SYuval Mintz 345fe56b9e6SYuval Mintz if (!p_eqe) { 346fe56b9e6SYuval Mintz rc = -EINVAL; 347fe56b9e6SYuval Mintz break; 348fe56b9e6SYuval Mintz } 349fe56b9e6SYuval Mintz 350fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 351fe56b9e6SYuval Mintz "op %x prot %x res0 %x echo %x fwret %x flags %x\n", 352fe56b9e6SYuval Mintz p_eqe->opcode, 353fe56b9e6SYuval Mintz p_eqe->protocol_id, 354fe56b9e6SYuval Mintz p_eqe->reserved0, 355fe56b9e6SYuval Mintz le16_to_cpu(p_eqe->echo), 356fe56b9e6SYuval Mintz p_eqe->fw_return_code, 357fe56b9e6SYuval Mintz p_eqe->flags); 358fe56b9e6SYuval Mintz 359fe56b9e6SYuval Mintz if (GET_FIELD(p_eqe->flags, EVENT_RING_ENTRY_ASYNC)) { 360fe56b9e6SYuval Mintz if (qed_async_event_completion(p_hwfn, p_eqe)) 361fe56b9e6SYuval Mintz rc = -EINVAL; 362fe56b9e6SYuval Mintz } else if (qed_spq_completion(p_hwfn, 363fe56b9e6SYuval Mintz p_eqe->echo, 364fe56b9e6SYuval Mintz p_eqe->fw_return_code, 365fe56b9e6SYuval Mintz &p_eqe->data)) { 366fe56b9e6SYuval Mintz rc = -EINVAL; 367fe56b9e6SYuval Mintz } 368fe56b9e6SYuval Mintz 369fe56b9e6SYuval Mintz qed_chain_recycle_consumed(p_chain); 370fe56b9e6SYuval Mintz } 371fe56b9e6SYuval Mintz 372fe56b9e6SYuval Mintz qed_eq_prod_update(p_hwfn, qed_chain_get_prod_idx(p_chain)); 373fe56b9e6SYuval Mintz 374660492bcSManish Chopra /* Attempt to post pending requests */ 375660492bcSManish Chopra spin_lock_bh(&p_hwfn->p_spq->lock); 376660492bcSManish Chopra rc = qed_spq_pend_post(p_hwfn); 377660492bcSManish Chopra spin_unlock_bh(&p_hwfn->p_spq->lock); 378660492bcSManish Chopra 379fe56b9e6SYuval Mintz return rc; 380fe56b9e6SYuval Mintz } 381fe56b9e6SYuval Mintz 3823587cb87STomer Tayar int qed_eq_alloc(struct qed_hwfn *p_hwfn, u16 num_elem) 383fe56b9e6SYuval Mintz { 384fe56b9e6SYuval Mintz struct qed_eq *p_eq; 385fe56b9e6SYuval Mintz 386fe56b9e6SYuval Mintz /* Allocate EQ struct */ 38760fffb3bSYuval Mintz p_eq = kzalloc(sizeof(*p_eq), GFP_KERNEL); 3882591c280SJoe Perches if (!p_eq) 3893587cb87STomer Tayar return -ENOMEM; 390fe56b9e6SYuval Mintz 391fe56b9e6SYuval Mintz /* Allocate and initialize EQ chain*/ 392fe56b9e6SYuval Mintz if (qed_chain_alloc(p_hwfn->cdev, 393fe56b9e6SYuval Mintz QED_CHAIN_USE_TO_PRODUCE, 394fe56b9e6SYuval Mintz QED_CHAIN_MODE_PBL, 395a91eb52aSYuval Mintz QED_CHAIN_CNT_TYPE_U16, 396fe56b9e6SYuval Mintz num_elem, 397fe56b9e6SYuval Mintz sizeof(union event_ring_element), 3981a4a6975SMintz, Yuval &p_eq->chain, NULL)) 399fe56b9e6SYuval Mintz goto eq_allocate_fail; 400fe56b9e6SYuval Mintz 401fe56b9e6SYuval Mintz /* register EQ completion on the SP SB */ 4021a635e48SYuval Mintz qed_int_register_cb(p_hwfn, qed_eq_completion, 4031a635e48SYuval Mintz p_eq, &p_eq->eq_sb_index, &p_eq->p_fw_cons); 404fe56b9e6SYuval Mintz 4053587cb87STomer Tayar p_hwfn->p_eq = p_eq; 4063587cb87STomer Tayar return 0; 407fe56b9e6SYuval Mintz 408fe56b9e6SYuval Mintz eq_allocate_fail: 409fe56b9e6SYuval Mintz kfree(p_eq); 4103587cb87STomer Tayar return -ENOMEM; 4113587cb87STomer Tayar } 4123587cb87STomer Tayar 4133587cb87STomer Tayar void qed_eq_setup(struct qed_hwfn *p_hwfn) 4143587cb87STomer Tayar { 4153587cb87STomer Tayar qed_chain_reset(&p_hwfn->p_eq->chain); 4163587cb87STomer Tayar } 4173587cb87STomer Tayar 4183587cb87STomer Tayar void qed_eq_free(struct qed_hwfn *p_hwfn) 4193587cb87STomer Tayar { 4203587cb87STomer Tayar if (!p_hwfn->p_eq) 4213587cb87STomer Tayar return; 4223587cb87STomer Tayar 4233587cb87STomer Tayar qed_chain_free(p_hwfn->cdev, &p_hwfn->p_eq->chain); 4243587cb87STomer Tayar 4253587cb87STomer Tayar kfree(p_hwfn->p_eq); 4263587cb87STomer Tayar p_hwfn->p_eq = NULL; 427fe56b9e6SYuval Mintz } 428fe56b9e6SYuval Mintz 429fe56b9e6SYuval Mintz /*************************************************************************** 430cee4d264SManish Chopra * CQE API - manipulate EQ functionality 431cee4d264SManish Chopra ***************************************************************************/ 4321a635e48SYuval Mintz static int qed_cqe_completion(struct qed_hwfn *p_hwfn, 433cee4d264SManish Chopra struct eth_slow_path_rx_cqe *cqe, 434cee4d264SManish Chopra enum protocol_type protocol) 435cee4d264SManish Chopra { 4361408cc1fSYuval Mintz if (IS_VF(p_hwfn->cdev)) 4371408cc1fSYuval Mintz return 0; 4381408cc1fSYuval Mintz 439cee4d264SManish Chopra /* @@@tmp - it's possible we'll eventually want to handle some 440cee4d264SManish Chopra * actual commands that can arrive here, but for now this is only 441cee4d264SManish Chopra * used to complete the ramrod using the echo value on the cqe 442cee4d264SManish Chopra */ 443cee4d264SManish Chopra return qed_spq_completion(p_hwfn, cqe->echo, 0, NULL); 444cee4d264SManish Chopra } 445cee4d264SManish Chopra 446cee4d264SManish Chopra int qed_eth_cqe_completion(struct qed_hwfn *p_hwfn, 447cee4d264SManish Chopra struct eth_slow_path_rx_cqe *cqe) 448cee4d264SManish Chopra { 449cee4d264SManish Chopra int rc; 450cee4d264SManish Chopra 451cee4d264SManish Chopra rc = qed_cqe_completion(p_hwfn, cqe, PROTOCOLID_ETH); 452cee4d264SManish Chopra if (rc) 453cee4d264SManish Chopra DP_NOTICE(p_hwfn, 454cee4d264SManish Chopra "Failed to handle RXQ CQE [cmd 0x%02x]\n", 455cee4d264SManish Chopra cqe->ramrod_cmd_id); 456cee4d264SManish Chopra 457cee4d264SManish Chopra return rc; 458cee4d264SManish Chopra } 459cee4d264SManish Chopra 460cee4d264SManish Chopra /*************************************************************************** 461fe56b9e6SYuval Mintz * Slow hwfn Queue (spq) 462fe56b9e6SYuval Mintz ***************************************************************************/ 463fe56b9e6SYuval Mintz void qed_spq_setup(struct qed_hwfn *p_hwfn) 464fe56b9e6SYuval Mintz { 465fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 466fe56b9e6SYuval Mintz struct qed_spq_entry *p_virt = NULL; 4679ecd8c3fSAriel Elior struct core_db_data *p_db_data; 4689ecd8c3fSAriel Elior void __iomem *db_addr; 469fe56b9e6SYuval Mintz dma_addr_t p_phys = 0; 470a91eb52aSYuval Mintz u32 i, capacity; 4719ecd8c3fSAriel Elior int rc; 472fe56b9e6SYuval Mintz 473fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->pending); 474fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->completion_pending); 475fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->free_pool); 476fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->unlimited_pending); 477fe56b9e6SYuval Mintz spin_lock_init(&p_spq->lock); 478fe56b9e6SYuval Mintz 479fe56b9e6SYuval Mintz /* SPQ empty pool */ 480fe56b9e6SYuval Mintz p_phys = p_spq->p_phys + offsetof(struct qed_spq_entry, ramrod); 481fe56b9e6SYuval Mintz p_virt = p_spq->p_virt; 482fe56b9e6SYuval Mintz 483a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 484a91eb52aSYuval Mintz for (i = 0; i < capacity; i++) { 48594494598SYuval Mintz DMA_REGPAIR_LE(p_virt->elem.data_ptr, p_phys); 486fe56b9e6SYuval Mintz 487fe56b9e6SYuval Mintz list_add_tail(&p_virt->list, &p_spq->free_pool); 488fe56b9e6SYuval Mintz 489fe56b9e6SYuval Mintz p_virt++; 490fe56b9e6SYuval Mintz p_phys += sizeof(struct qed_spq_entry); 491fe56b9e6SYuval Mintz } 492fe56b9e6SYuval Mintz 493fe56b9e6SYuval Mintz /* Statistics */ 494fe56b9e6SYuval Mintz p_spq->normal_count = 0; 495fe56b9e6SYuval Mintz p_spq->comp_count = 0; 496fe56b9e6SYuval Mintz p_spq->comp_sent_count = 0; 497fe56b9e6SYuval Mintz p_spq->unlimited_pending_count = 0; 49876a9a364STomer Tayar 49976a9a364STomer Tayar bitmap_zero(p_spq->p_comp_bitmap, SPQ_RING_SIZE); 50076a9a364STomer Tayar p_spq->comp_bitmap_idx = 0; 501fe56b9e6SYuval Mintz 502fe56b9e6SYuval Mintz /* SPQ cid, cannot fail */ 503fe56b9e6SYuval Mintz qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_spq->cid); 504fe56b9e6SYuval Mintz qed_spq_hw_initialize(p_hwfn, p_spq); 505fe56b9e6SYuval Mintz 506fe56b9e6SYuval Mintz /* reset the chain itself */ 507fe56b9e6SYuval Mintz qed_chain_reset(&p_spq->chain); 5089ecd8c3fSAriel Elior 5099ecd8c3fSAriel Elior /* Initialize the address/data of the SPQ doorbell */ 5109ecd8c3fSAriel Elior p_spq->db_addr_offset = qed_db_addr(p_spq->cid, DQ_DEMS_LEGACY); 5119ecd8c3fSAriel Elior p_db_data = &p_spq->db_data; 5129ecd8c3fSAriel Elior memset(p_db_data, 0, sizeof(*p_db_data)); 5139ecd8c3fSAriel Elior SET_FIELD(p_db_data->params, CORE_DB_DATA_DEST, DB_DEST_XCM); 5149ecd8c3fSAriel Elior SET_FIELD(p_db_data->params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_MAX); 5159ecd8c3fSAriel Elior SET_FIELD(p_db_data->params, CORE_DB_DATA_AGG_VAL_SEL, 5169ecd8c3fSAriel Elior DQ_XCM_CORE_SPQ_PROD_CMD); 5179ecd8c3fSAriel Elior p_db_data->agg_flags = DQ_XCM_CORE_DQ_CF_CMD; 5189ecd8c3fSAriel Elior 5199ecd8c3fSAriel Elior /* Register the SPQ doorbell with the doorbell recovery mechanism */ 5209ecd8c3fSAriel Elior db_addr = (void __iomem *)((u8 __iomem *)p_hwfn->doorbells + 5219ecd8c3fSAriel Elior p_spq->db_addr_offset); 5229ecd8c3fSAriel Elior rc = qed_db_recovery_add(p_hwfn->cdev, db_addr, &p_spq->db_data, 5239ecd8c3fSAriel Elior DB_REC_WIDTH_32B, DB_REC_KERNEL); 5249ecd8c3fSAriel Elior if (rc) 5259ecd8c3fSAriel Elior DP_INFO(p_hwfn, 5269ecd8c3fSAriel Elior "Failed to register the SPQ doorbell with the doorbell recovery mechanism\n"); 527fe56b9e6SYuval Mintz } 528fe56b9e6SYuval Mintz 529fe56b9e6SYuval Mintz int qed_spq_alloc(struct qed_hwfn *p_hwfn) 530fe56b9e6SYuval Mintz { 531a91eb52aSYuval Mintz struct qed_spq_entry *p_virt = NULL; 532fe56b9e6SYuval Mintz struct qed_spq *p_spq = NULL; 533fe56b9e6SYuval Mintz dma_addr_t p_phys = 0; 534a91eb52aSYuval Mintz u32 capacity; 535fe56b9e6SYuval Mintz 536fe56b9e6SYuval Mintz /* SPQ struct */ 5371a635e48SYuval Mintz p_spq = kzalloc(sizeof(struct qed_spq), GFP_KERNEL); 5382591c280SJoe Perches if (!p_spq) 539fe56b9e6SYuval Mintz return -ENOMEM; 540fe56b9e6SYuval Mintz 541fe56b9e6SYuval Mintz /* SPQ ring */ 542fe56b9e6SYuval Mintz if (qed_chain_alloc(p_hwfn->cdev, 543fe56b9e6SYuval Mintz QED_CHAIN_USE_TO_PRODUCE, 544fe56b9e6SYuval Mintz QED_CHAIN_MODE_SINGLE, 545a91eb52aSYuval Mintz QED_CHAIN_CNT_TYPE_U16, 546fe56b9e6SYuval Mintz 0, /* N/A when the mode is SINGLE */ 547fe56b9e6SYuval Mintz sizeof(struct slow_path_element), 5481a4a6975SMintz, Yuval &p_spq->chain, NULL)) 549fe56b9e6SYuval Mintz goto spq_allocate_fail; 550fe56b9e6SYuval Mintz 551fe56b9e6SYuval Mintz /* allocate and fill the SPQ elements (incl. ramrod data list) */ 552a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 553fe56b9e6SYuval Mintz p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev, 5542591c280SJoe Perches capacity * sizeof(struct qed_spq_entry), 555a91eb52aSYuval Mintz &p_phys, GFP_KERNEL); 556fe56b9e6SYuval Mintz if (!p_virt) 557fe56b9e6SYuval Mintz goto spq_allocate_fail; 558fe56b9e6SYuval Mintz 559fe56b9e6SYuval Mintz p_spq->p_virt = p_virt; 560fe56b9e6SYuval Mintz p_spq->p_phys = p_phys; 561fe56b9e6SYuval Mintz p_hwfn->p_spq = p_spq; 562fe56b9e6SYuval Mintz 563fe56b9e6SYuval Mintz return 0; 564fe56b9e6SYuval Mintz 565fe56b9e6SYuval Mintz spq_allocate_fail: 566fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_spq->chain); 567fe56b9e6SYuval Mintz kfree(p_spq); 568fe56b9e6SYuval Mintz return -ENOMEM; 569fe56b9e6SYuval Mintz } 570fe56b9e6SYuval Mintz 571fe56b9e6SYuval Mintz void qed_spq_free(struct qed_hwfn *p_hwfn) 572fe56b9e6SYuval Mintz { 573fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 5749ecd8c3fSAriel Elior void __iomem *db_addr; 575a91eb52aSYuval Mintz u32 capacity; 576fe56b9e6SYuval Mintz 577fe56b9e6SYuval Mintz if (!p_spq) 578fe56b9e6SYuval Mintz return; 579fe56b9e6SYuval Mintz 5809ecd8c3fSAriel Elior /* Delete the SPQ doorbell from the doorbell recovery mechanism */ 5819ecd8c3fSAriel Elior db_addr = (void __iomem *)((u8 __iomem *)p_hwfn->doorbells + 5829ecd8c3fSAriel Elior p_spq->db_addr_offset); 5839ecd8c3fSAriel Elior qed_db_recovery_del(p_hwfn->cdev, db_addr, &p_spq->db_data); 5849ecd8c3fSAriel Elior 585a91eb52aSYuval Mintz if (p_spq->p_virt) { 586a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 587fe56b9e6SYuval Mintz dma_free_coherent(&p_hwfn->cdev->pdev->dev, 588a91eb52aSYuval Mintz capacity * 589fe56b9e6SYuval Mintz sizeof(struct qed_spq_entry), 590a91eb52aSYuval Mintz p_spq->p_virt, p_spq->p_phys); 591a91eb52aSYuval Mintz } 592fe56b9e6SYuval Mintz 593fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_spq->chain); 594fe56b9e6SYuval Mintz kfree(p_spq); 5953587cb87STomer Tayar p_hwfn->p_spq = NULL; 596fe56b9e6SYuval Mintz } 597fe56b9e6SYuval Mintz 5981a635e48SYuval Mintz int qed_spq_get_entry(struct qed_hwfn *p_hwfn, struct qed_spq_entry **pp_ent) 599fe56b9e6SYuval Mintz { 600fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 601fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 602fe56b9e6SYuval Mintz int rc = 0; 603fe56b9e6SYuval Mintz 604fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 605fe56b9e6SYuval Mintz 606fe56b9e6SYuval Mintz if (list_empty(&p_spq->free_pool)) { 607fe56b9e6SYuval Mintz p_ent = kzalloc(sizeof(*p_ent), GFP_ATOMIC); 608fe56b9e6SYuval Mintz if (!p_ent) { 6091a635e48SYuval Mintz DP_NOTICE(p_hwfn, 6101a635e48SYuval Mintz "Failed to allocate an SPQ entry for a pending ramrod\n"); 611fe56b9e6SYuval Mintz rc = -ENOMEM; 612fe56b9e6SYuval Mintz goto out_unlock; 613fe56b9e6SYuval Mintz } 614fe56b9e6SYuval Mintz p_ent->queue = &p_spq->unlimited_pending; 615fe56b9e6SYuval Mintz } else { 616fe56b9e6SYuval Mintz p_ent = list_first_entry(&p_spq->free_pool, 6171a635e48SYuval Mintz struct qed_spq_entry, list); 618fe56b9e6SYuval Mintz list_del(&p_ent->list); 619fe56b9e6SYuval Mintz p_ent->queue = &p_spq->pending; 620fe56b9e6SYuval Mintz } 621fe56b9e6SYuval Mintz 622fe56b9e6SYuval Mintz *pp_ent = p_ent; 623fe56b9e6SYuval Mintz 624fe56b9e6SYuval Mintz out_unlock: 625fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 626fe56b9e6SYuval Mintz return rc; 627fe56b9e6SYuval Mintz } 628fe56b9e6SYuval Mintz 629fe56b9e6SYuval Mintz /* Locked variant; Should be called while the SPQ lock is taken */ 630fe56b9e6SYuval Mintz static void __qed_spq_return_entry(struct qed_hwfn *p_hwfn, 631fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent) 632fe56b9e6SYuval Mintz { 633fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_hwfn->p_spq->free_pool); 634fe56b9e6SYuval Mintz } 635fe56b9e6SYuval Mintz 6361a635e48SYuval Mintz void qed_spq_return_entry(struct qed_hwfn *p_hwfn, struct qed_spq_entry *p_ent) 637fe56b9e6SYuval Mintz { 638fe56b9e6SYuval Mintz spin_lock_bh(&p_hwfn->p_spq->lock); 639fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 640fe56b9e6SYuval Mintz spin_unlock_bh(&p_hwfn->p_spq->lock); 641fe56b9e6SYuval Mintz } 642fe56b9e6SYuval Mintz 643fe56b9e6SYuval Mintz /** 644fe56b9e6SYuval Mintz * @brief qed_spq_add_entry - adds a new entry to the pending 645fe56b9e6SYuval Mintz * list. Should be used while lock is being held. 646fe56b9e6SYuval Mintz * 647fe56b9e6SYuval Mintz * Addes an entry to the pending list is there is room (en empty 648fe56b9e6SYuval Mintz * element is available in the free_pool), or else places the 649fe56b9e6SYuval Mintz * entry in the unlimited_pending pool. 650fe56b9e6SYuval Mintz * 651fe56b9e6SYuval Mintz * @param p_hwfn 652fe56b9e6SYuval Mintz * @param p_ent 653fe56b9e6SYuval Mintz * @param priority 654fe56b9e6SYuval Mintz * 655fe56b9e6SYuval Mintz * @return int 656fe56b9e6SYuval Mintz */ 6571a635e48SYuval Mintz static int qed_spq_add_entry(struct qed_hwfn *p_hwfn, 658fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent, 659fe56b9e6SYuval Mintz enum spq_priority priority) 660fe56b9e6SYuval Mintz { 661fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 662fe56b9e6SYuval Mintz 663fe56b9e6SYuval Mintz if (p_ent->queue == &p_spq->unlimited_pending) { 664fe56b9e6SYuval Mintz 665fe56b9e6SYuval Mintz if (list_empty(&p_spq->free_pool)) { 666fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->unlimited_pending); 667fe56b9e6SYuval Mintz p_spq->unlimited_pending_count++; 668fe56b9e6SYuval Mintz 669fe56b9e6SYuval Mintz return 0; 67076a9a364STomer Tayar } else { 67176a9a364STomer Tayar struct qed_spq_entry *p_en2; 672fe56b9e6SYuval Mintz 673fe56b9e6SYuval Mintz p_en2 = list_first_entry(&p_spq->free_pool, 6741a635e48SYuval Mintz struct qed_spq_entry, list); 675fe56b9e6SYuval Mintz list_del(&p_en2->list); 676fe56b9e6SYuval Mintz 67776a9a364STomer Tayar /* Copy the ring element physical pointer to the new 67876a9a364STomer Tayar * entry, since we are about to override the entire ring 67976a9a364STomer Tayar * entry and don't want to lose the pointer. 68076a9a364STomer Tayar */ 68176a9a364STomer Tayar p_ent->elem.data_ptr = p_en2->elem.data_ptr; 68276a9a364STomer Tayar 683fe56b9e6SYuval Mintz *p_en2 = *p_ent; 684fe56b9e6SYuval Mintz 685db511c37SYuval Mintz /* EBLOCK responsible to free the allocated p_ent */ 686db511c37SYuval Mintz if (p_ent->comp_mode != QED_SPQ_MODE_EBLOCK) 687fe56b9e6SYuval Mintz kfree(p_ent); 6882632f22eSDenis Bolotin else 6892632f22eSDenis Bolotin p_ent->post_ent = p_en2; 690fe56b9e6SYuval Mintz 691fe56b9e6SYuval Mintz p_ent = p_en2; 692fe56b9e6SYuval Mintz } 69376a9a364STomer Tayar } 694fe56b9e6SYuval Mintz 695fe56b9e6SYuval Mintz /* entry is to be placed in 'pending' queue */ 696fe56b9e6SYuval Mintz switch (priority) { 697fe56b9e6SYuval Mintz case QED_SPQ_PRIORITY_NORMAL: 698fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->pending); 699fe56b9e6SYuval Mintz p_spq->normal_count++; 700fe56b9e6SYuval Mintz break; 701fe56b9e6SYuval Mintz case QED_SPQ_PRIORITY_HIGH: 702fe56b9e6SYuval Mintz list_add(&p_ent->list, &p_spq->pending); 703fe56b9e6SYuval Mintz p_spq->high_count++; 704fe56b9e6SYuval Mintz break; 705fe56b9e6SYuval Mintz default: 706fe56b9e6SYuval Mintz return -EINVAL; 707fe56b9e6SYuval Mintz } 708fe56b9e6SYuval Mintz 709fe56b9e6SYuval Mintz return 0; 710fe56b9e6SYuval Mintz } 711fe56b9e6SYuval Mintz 712fe56b9e6SYuval Mintz /*************************************************************************** 713fe56b9e6SYuval Mintz * Accessor 714fe56b9e6SYuval Mintz ***************************************************************************/ 715fe56b9e6SYuval Mintz u32 qed_spq_get_cid(struct qed_hwfn *p_hwfn) 716fe56b9e6SYuval Mintz { 717fe56b9e6SYuval Mintz if (!p_hwfn->p_spq) 718fe56b9e6SYuval Mintz return 0xffffffff; /* illegal */ 719fe56b9e6SYuval Mintz return p_hwfn->p_spq->cid; 720fe56b9e6SYuval Mintz } 721fe56b9e6SYuval Mintz 722fe56b9e6SYuval Mintz /*************************************************************************** 723fe56b9e6SYuval Mintz * Posting new Ramrods 724fe56b9e6SYuval Mintz ***************************************************************************/ 725fe56b9e6SYuval Mintz static int qed_spq_post_list(struct qed_hwfn *p_hwfn, 7261a635e48SYuval Mintz struct list_head *head, u32 keep_reserve) 727fe56b9e6SYuval Mintz { 728fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 729fe56b9e6SYuval Mintz int rc; 730fe56b9e6SYuval Mintz 731fe56b9e6SYuval Mintz while (qed_chain_get_elem_left(&p_spq->chain) > keep_reserve && 732fe56b9e6SYuval Mintz !list_empty(head)) { 733fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = 734fe56b9e6SYuval Mintz list_first_entry(head, struct qed_spq_entry, list); 735631e871eSzhong jiang list_move_tail(&p_ent->list, &p_spq->completion_pending); 736fe56b9e6SYuval Mintz p_spq->comp_sent_count++; 737fe56b9e6SYuval Mintz 738fe56b9e6SYuval Mintz rc = qed_spq_hw_post(p_hwfn, p_spq, p_ent); 739fe56b9e6SYuval Mintz if (rc) { 740fe56b9e6SYuval Mintz list_del(&p_ent->list); 741fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 742fe56b9e6SYuval Mintz return rc; 743fe56b9e6SYuval Mintz } 744fe56b9e6SYuval Mintz } 745fe56b9e6SYuval Mintz 746fe56b9e6SYuval Mintz return 0; 747fe56b9e6SYuval Mintz } 748fe56b9e6SYuval Mintz 749660492bcSManish Chopra int qed_spq_pend_post(struct qed_hwfn *p_hwfn) 750fe56b9e6SYuval Mintz { 751fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 752fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 753fe56b9e6SYuval Mintz 754fe56b9e6SYuval Mintz while (!list_empty(&p_spq->free_pool)) { 755fe56b9e6SYuval Mintz if (list_empty(&p_spq->unlimited_pending)) 756fe56b9e6SYuval Mintz break; 757fe56b9e6SYuval Mintz 758fe56b9e6SYuval Mintz p_ent = list_first_entry(&p_spq->unlimited_pending, 7591a635e48SYuval Mintz struct qed_spq_entry, list); 760fe56b9e6SYuval Mintz if (!p_ent) 761fe56b9e6SYuval Mintz return -EINVAL; 762fe56b9e6SYuval Mintz 763fe56b9e6SYuval Mintz list_del(&p_ent->list); 764fe56b9e6SYuval Mintz 765fe56b9e6SYuval Mintz qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); 766fe56b9e6SYuval Mintz } 767fe56b9e6SYuval Mintz 768fe56b9e6SYuval Mintz return qed_spq_post_list(p_hwfn, &p_spq->pending, 769fe56b9e6SYuval Mintz SPQ_HIGH_PRI_RESERVE_DEFAULT); 770fe56b9e6SYuval Mintz } 771fe56b9e6SYuval Mintz 77264515dc8STomer Tayar static void qed_spq_recov_set_ret_code(struct qed_spq_entry *p_ent, 77364515dc8STomer Tayar u8 *fw_return_code) 77464515dc8STomer Tayar { 77564515dc8STomer Tayar if (!fw_return_code) 77664515dc8STomer Tayar return; 77764515dc8STomer Tayar 77864515dc8STomer Tayar if (p_ent->elem.hdr.protocol_id == PROTOCOLID_ROCE || 77964515dc8STomer Tayar p_ent->elem.hdr.protocol_id == PROTOCOLID_IWARP) 78064515dc8STomer Tayar *fw_return_code = RDMA_RETURN_OK; 78164515dc8STomer Tayar } 78264515dc8STomer Tayar 7832632f22eSDenis Bolotin /* Avoid overriding of SPQ entries when getting out-of-order completions, by 7842632f22eSDenis Bolotin * marking the completions in a bitmap and increasing the chain consumer only 7852632f22eSDenis Bolotin * for the first successive completed entries. 7862632f22eSDenis Bolotin */ 7872632f22eSDenis Bolotin static void qed_spq_comp_bmap_update(struct qed_hwfn *p_hwfn, __le16 echo) 7882632f22eSDenis Bolotin { 7892632f22eSDenis Bolotin u16 pos = le16_to_cpu(echo) % SPQ_RING_SIZE; 7902632f22eSDenis Bolotin struct qed_spq *p_spq = p_hwfn->p_spq; 7912632f22eSDenis Bolotin 7922632f22eSDenis Bolotin __set_bit(pos, p_spq->p_comp_bitmap); 7932632f22eSDenis Bolotin while (test_bit(p_spq->comp_bitmap_idx, 7942632f22eSDenis Bolotin p_spq->p_comp_bitmap)) { 7952632f22eSDenis Bolotin __clear_bit(p_spq->comp_bitmap_idx, 7962632f22eSDenis Bolotin p_spq->p_comp_bitmap); 7972632f22eSDenis Bolotin p_spq->comp_bitmap_idx++; 7982632f22eSDenis Bolotin qed_chain_return_produced(&p_spq->chain); 7992632f22eSDenis Bolotin } 8002632f22eSDenis Bolotin } 8012632f22eSDenis Bolotin 802fe56b9e6SYuval Mintz int qed_spq_post(struct qed_hwfn *p_hwfn, 8031a635e48SYuval Mintz struct qed_spq_entry *p_ent, u8 *fw_return_code) 804fe56b9e6SYuval Mintz { 805fe56b9e6SYuval Mintz int rc = 0; 806fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn ? p_hwfn->p_spq : NULL; 807fe56b9e6SYuval Mintz bool b_ret_ent = true; 80870eeff66SRoland Dreier bool eblock; 809fe56b9e6SYuval Mintz 810fe56b9e6SYuval Mintz if (!p_hwfn) 811fe56b9e6SYuval Mintz return -EINVAL; 812fe56b9e6SYuval Mintz 813fe56b9e6SYuval Mintz if (!p_ent) { 814fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Got a NULL pointer\n"); 815fe56b9e6SYuval Mintz return -EINVAL; 816fe56b9e6SYuval Mintz } 817fe56b9e6SYuval Mintz 81864515dc8STomer Tayar if (p_hwfn->cdev->recov_in_prog) { 81964515dc8STomer Tayar DP_VERBOSE(p_hwfn, 82064515dc8STomer Tayar QED_MSG_SPQ, 82164515dc8STomer Tayar "Recovery is in progress. Skip spq post [cmd %02x protocol %02x]\n", 82264515dc8STomer Tayar p_ent->elem.hdr.cmd_id, p_ent->elem.hdr.protocol_id); 82364515dc8STomer Tayar 82464515dc8STomer Tayar /* Let the flow complete w/o any error handling */ 82564515dc8STomer Tayar qed_spq_recov_set_ret_code(p_ent, fw_return_code); 82664515dc8STomer Tayar return 0; 82764515dc8STomer Tayar } 82864515dc8STomer Tayar 829fe56b9e6SYuval Mintz /* Complete the entry */ 830fe56b9e6SYuval Mintz rc = qed_spq_fill_entry(p_hwfn, p_ent); 831fe56b9e6SYuval Mintz 832fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 833fe56b9e6SYuval Mintz 834fe56b9e6SYuval Mintz /* Check return value after LOCK is taken for cleaner error flow */ 835fe56b9e6SYuval Mintz if (rc) 836fe56b9e6SYuval Mintz goto spq_post_fail; 837fe56b9e6SYuval Mintz 83870eeff66SRoland Dreier /* Check if entry is in block mode before qed_spq_add_entry, 83970eeff66SRoland Dreier * which might kfree p_ent. 84070eeff66SRoland Dreier */ 84170eeff66SRoland Dreier eblock = (p_ent->comp_mode == QED_SPQ_MODE_EBLOCK); 84270eeff66SRoland Dreier 843fe56b9e6SYuval Mintz /* Add the request to the pending queue */ 844fe56b9e6SYuval Mintz rc = qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); 845fe56b9e6SYuval Mintz if (rc) 846fe56b9e6SYuval Mintz goto spq_post_fail; 847fe56b9e6SYuval Mintz 848fe56b9e6SYuval Mintz rc = qed_spq_pend_post(p_hwfn); 849fe56b9e6SYuval Mintz if (rc) { 850fe56b9e6SYuval Mintz /* Since it's possible that pending failed for a different 851fe56b9e6SYuval Mintz * entry [although unlikely], the failed entry was already 852fe56b9e6SYuval Mintz * dealt with; No need to return it here. 853fe56b9e6SYuval Mintz */ 854fe56b9e6SYuval Mintz b_ret_ent = false; 855fe56b9e6SYuval Mintz goto spq_post_fail; 856fe56b9e6SYuval Mintz } 857fe56b9e6SYuval Mintz 858fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 859fe56b9e6SYuval Mintz 86070eeff66SRoland Dreier if (eblock) { 861fe56b9e6SYuval Mintz /* For entries in QED BLOCK mode, the completion code cannot 862fe56b9e6SYuval Mintz * perform the necessary cleanup - if it did, we couldn't 863fe56b9e6SYuval Mintz * access p_ent here to see whether it's successful or not. 864fe56b9e6SYuval Mintz * Thus, after gaining the answer perform the cleanup here. 865fe56b9e6SYuval Mintz */ 866c59f5291SYuval Mintz rc = qed_spq_block(p_hwfn, p_ent, fw_return_code, 867c59f5291SYuval Mintz p_ent->queue == &p_spq->unlimited_pending); 868db511c37SYuval Mintz 869db511c37SYuval Mintz if (p_ent->queue == &p_spq->unlimited_pending) { 8702632f22eSDenis Bolotin struct qed_spq_entry *p_post_ent = p_ent->post_ent; 8712632f22eSDenis Bolotin 872db511c37SYuval Mintz kfree(p_ent); 8732632f22eSDenis Bolotin 8742632f22eSDenis Bolotin /* Return the entry which was actually posted */ 8752632f22eSDenis Bolotin p_ent = p_post_ent; 876db511c37SYuval Mintz } 877db511c37SYuval Mintz 878fe56b9e6SYuval Mintz if (rc) 879fe56b9e6SYuval Mintz goto spq_post_fail2; 880fe56b9e6SYuval Mintz 881fe56b9e6SYuval Mintz /* return to pool */ 882fe56b9e6SYuval Mintz qed_spq_return_entry(p_hwfn, p_ent); 883fe56b9e6SYuval Mintz } 884fe56b9e6SYuval Mintz return rc; 885fe56b9e6SYuval Mintz 886fe56b9e6SYuval Mintz spq_post_fail2: 887fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 888fe56b9e6SYuval Mintz list_del(&p_ent->list); 8892632f22eSDenis Bolotin qed_spq_comp_bmap_update(p_hwfn, p_ent->elem.hdr.echo); 890fe56b9e6SYuval Mintz 891fe56b9e6SYuval Mintz spq_post_fail: 892fe56b9e6SYuval Mintz /* return to the free pool */ 893fe56b9e6SYuval Mintz if (b_ret_ent) 894fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 895fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 896fe56b9e6SYuval Mintz 897fe56b9e6SYuval Mintz return rc; 898fe56b9e6SYuval Mintz } 899fe56b9e6SYuval Mintz 900fe56b9e6SYuval Mintz int qed_spq_completion(struct qed_hwfn *p_hwfn, 901fe56b9e6SYuval Mintz __le16 echo, 902fe56b9e6SYuval Mintz u8 fw_return_code, 903fe56b9e6SYuval Mintz union event_ring_data *p_data) 904fe56b9e6SYuval Mintz { 905fe56b9e6SYuval Mintz struct qed_spq *p_spq; 906fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 907fe56b9e6SYuval Mintz struct qed_spq_entry *tmp; 908fe56b9e6SYuval Mintz struct qed_spq_entry *found = NULL; 909fe56b9e6SYuval Mintz 910fe56b9e6SYuval Mintz if (!p_hwfn) 911fe56b9e6SYuval Mintz return -EINVAL; 912fe56b9e6SYuval Mintz 913fe56b9e6SYuval Mintz p_spq = p_hwfn->p_spq; 914fe56b9e6SYuval Mintz if (!p_spq) 915fe56b9e6SYuval Mintz return -EINVAL; 916fe56b9e6SYuval Mintz 917fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 9181a635e48SYuval Mintz list_for_each_entry_safe(p_ent, tmp, &p_spq->completion_pending, list) { 919fe56b9e6SYuval Mintz if (p_ent->elem.hdr.echo == echo) { 920fe56b9e6SYuval Mintz list_del(&p_ent->list); 9212632f22eSDenis Bolotin qed_spq_comp_bmap_update(p_hwfn, echo); 922fe56b9e6SYuval Mintz p_spq->comp_count++; 923fe56b9e6SYuval Mintz found = p_ent; 924fe56b9e6SYuval Mintz break; 925fe56b9e6SYuval Mintz } 92676a9a364STomer Tayar 92776a9a364STomer Tayar /* This is relatively uncommon - depends on scenarios 92876a9a364STomer Tayar * which have mutliple per-PF sent ramrods. 92976a9a364STomer Tayar */ 93076a9a364STomer Tayar DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 93176a9a364STomer Tayar "Got completion for echo %04x - doesn't match echo %04x in completion pending list\n", 93276a9a364STomer Tayar le16_to_cpu(echo), 93376a9a364STomer Tayar le16_to_cpu(p_ent->elem.hdr.echo)); 934fe56b9e6SYuval Mintz } 935fe56b9e6SYuval Mintz 936fe56b9e6SYuval Mintz /* Release lock before callback, as callback may post 937fe56b9e6SYuval Mintz * an additional ramrod. 938fe56b9e6SYuval Mintz */ 939fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 940fe56b9e6SYuval Mintz 941fe56b9e6SYuval Mintz if (!found) { 942fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, 943525ef5c0SYuval Mintz "Failed to find an entry this EQE [echo %04x] completes\n", 944525ef5c0SYuval Mintz le16_to_cpu(echo)); 945fe56b9e6SYuval Mintz return -EEXIST; 946fe56b9e6SYuval Mintz } 947fe56b9e6SYuval Mintz 948525ef5c0SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 949525ef5c0SYuval Mintz "Complete EQE [echo %04x]: func %p cookie %p)\n", 950525ef5c0SYuval Mintz le16_to_cpu(echo), 951fe56b9e6SYuval Mintz p_ent->comp_cb.function, p_ent->comp_cb.cookie); 952fe56b9e6SYuval Mintz if (found->comp_cb.function) 953fe56b9e6SYuval Mintz found->comp_cb.function(p_hwfn, found->comp_cb.cookie, p_data, 954fe56b9e6SYuval Mintz fw_return_code); 955525ef5c0SYuval Mintz else 956525ef5c0SYuval Mintz DP_VERBOSE(p_hwfn, 957525ef5c0SYuval Mintz QED_MSG_SPQ, 958525ef5c0SYuval Mintz "Got a completion without a callback function\n"); 959fe56b9e6SYuval Mintz 9602632f22eSDenis Bolotin if (found->comp_mode != QED_SPQ_MODE_EBLOCK) 961db511c37SYuval Mintz /* EBLOCK is responsible for returning its own entry into the 9622632f22eSDenis Bolotin * free list. 963db511c37SYuval Mintz */ 964fe56b9e6SYuval Mintz qed_spq_return_entry(p_hwfn, found); 965fe56b9e6SYuval Mintz 966660492bcSManish Chopra return 0; 967fe56b9e6SYuval Mintz } 968fe56b9e6SYuval Mintz 9693587cb87STomer Tayar int qed_consq_alloc(struct qed_hwfn *p_hwfn) 970fe56b9e6SYuval Mintz { 971fe56b9e6SYuval Mintz struct qed_consq *p_consq; 972fe56b9e6SYuval Mintz 973fe56b9e6SYuval Mintz /* Allocate ConsQ struct */ 97460fffb3bSYuval Mintz p_consq = kzalloc(sizeof(*p_consq), GFP_KERNEL); 9752591c280SJoe Perches if (!p_consq) 9763587cb87STomer Tayar return -ENOMEM; 977fe56b9e6SYuval Mintz 978fe56b9e6SYuval Mintz /* Allocate and initialize EQ chain*/ 979fe56b9e6SYuval Mintz if (qed_chain_alloc(p_hwfn->cdev, 980fe56b9e6SYuval Mintz QED_CHAIN_USE_TO_PRODUCE, 981fe56b9e6SYuval Mintz QED_CHAIN_MODE_PBL, 982a91eb52aSYuval Mintz QED_CHAIN_CNT_TYPE_U16, 983fe56b9e6SYuval Mintz QED_CHAIN_PAGE_SIZE / 0x80, 9841a4a6975SMintz, Yuval 0x80, &p_consq->chain, NULL)) 985fe56b9e6SYuval Mintz goto consq_allocate_fail; 986fe56b9e6SYuval Mintz 9873587cb87STomer Tayar p_hwfn->p_consq = p_consq; 9883587cb87STomer Tayar return 0; 989fe56b9e6SYuval Mintz 990fe56b9e6SYuval Mintz consq_allocate_fail: 991fe56b9e6SYuval Mintz kfree(p_consq); 9923587cb87STomer Tayar return -ENOMEM; 9933587cb87STomer Tayar } 9943587cb87STomer Tayar 9953587cb87STomer Tayar void qed_consq_setup(struct qed_hwfn *p_hwfn) 9963587cb87STomer Tayar { 9973587cb87STomer Tayar qed_chain_reset(&p_hwfn->p_consq->chain); 9983587cb87STomer Tayar } 9993587cb87STomer Tayar 10003587cb87STomer Tayar void qed_consq_free(struct qed_hwfn *p_hwfn) 10013587cb87STomer Tayar { 10023587cb87STomer Tayar if (!p_hwfn->p_consq) 10033587cb87STomer Tayar return; 10043587cb87STomer Tayar 10053587cb87STomer Tayar qed_chain_free(p_hwfn->cdev, &p_hwfn->p_consq->chain); 10063587cb87STomer Tayar 10073587cb87STomer Tayar kfree(p_hwfn->p_consq); 10083587cb87STomer Tayar p_hwfn->p_consq = NULL; 1009fe56b9e6SYuval Mintz } 1010