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 4663eacd8SAlexander Lobakin * Copyright (c) 2019-2020 Marvell International Ltd. 5fe56b9e6SYuval Mintz */ 6fe56b9e6SYuval Mintz 7fe56b9e6SYuval Mintz #include <linux/types.h> 8fe56b9e6SYuval Mintz #include <asm/byteorder.h> 9fe56b9e6SYuval Mintz #include <linux/io.h> 10fe56b9e6SYuval Mintz #include <linux/delay.h> 11fe56b9e6SYuval Mintz #include <linux/dma-mapping.h> 12fe56b9e6SYuval Mintz #include <linux/errno.h> 13fe56b9e6SYuval Mintz #include <linux/kernel.h> 14fe56b9e6SYuval Mintz #include <linux/list.h> 15fe56b9e6SYuval Mintz #include <linux/pci.h> 16fe56b9e6SYuval Mintz #include <linux/slab.h> 17fe56b9e6SYuval Mintz #include <linux/spinlock.h> 18fe56b9e6SYuval Mintz #include <linux/string.h> 19fe56b9e6SYuval Mintz #include "qed.h" 20fe56b9e6SYuval Mintz #include "qed_cxt.h" 21fe56b9e6SYuval Mintz #include "qed_dev_api.h" 22fe56b9e6SYuval Mintz #include "qed_hsi.h" 23fe56b9e6SYuval Mintz #include "qed_hw.h" 24fe56b9e6SYuval Mintz #include "qed_int.h" 25fc831825SYuval Mintz #include "qed_iscsi.h" 26fe56b9e6SYuval Mintz #include "qed_mcp.h" 271d6cff4fSYuval Mintz #include "qed_ooo.h" 28fe56b9e6SYuval Mintz #include "qed_reg_addr.h" 29fe56b9e6SYuval Mintz #include "qed_sp.h" 3037bff2b9SYuval Mintz #include "qed_sriov.h" 31b71b9afdSKalderon, Michal #include "qed_rdma.h" 32fe56b9e6SYuval Mintz 33fe56b9e6SYuval Mintz /*************************************************************************** 34fe56b9e6SYuval Mintz * Structures & Definitions 35fe56b9e6SYuval Mintz ***************************************************************************/ 36fe56b9e6SYuval Mintz 37fe56b9e6SYuval Mintz #define SPQ_HIGH_PRI_RESERVE_DEFAULT (1) 38c59f5291SYuval Mintz 39c59f5291SYuval Mintz #define SPQ_BLOCK_DELAY_MAX_ITER (10) 40c59f5291SYuval Mintz #define SPQ_BLOCK_DELAY_US (10) 41c59f5291SYuval Mintz #define SPQ_BLOCK_SLEEP_MAX_ITER (1000) 42c59f5291SYuval Mintz #define SPQ_BLOCK_SLEEP_MS (5) 43fe56b9e6SYuval Mintz 44fe56b9e6SYuval Mintz /*************************************************************************** 45fe56b9e6SYuval Mintz * Blocking Imp. (BLOCK/EBLOCK mode) 46fe56b9e6SYuval Mintz ***************************************************************************/ 47fe56b9e6SYuval Mintz static void qed_spq_blocking_cb(struct qed_hwfn *p_hwfn, 48fe56b9e6SYuval Mintz void *cookie, 491a635e48SYuval Mintz union event_ring_data *data, u8 fw_return_code) 50fe56b9e6SYuval Mintz { 51fe56b9e6SYuval Mintz struct qed_spq_comp_done *comp_done; 52fe56b9e6SYuval Mintz 53fe56b9e6SYuval Mintz comp_done = (struct qed_spq_comp_done *)cookie; 54fe56b9e6SYuval Mintz 55fe56b9e6SYuval Mintz comp_done->fw_return_code = fw_return_code; 56fe56b9e6SYuval Mintz 57d5df7688SManish Chopra /* Make sure completion done is visible on waiting thread */ 58d5df7688SManish Chopra smp_store_release(&comp_done->done, 0x1); 59fe56b9e6SYuval Mintz } 60fe56b9e6SYuval Mintz 61c59f5291SYuval Mintz static int __qed_spq_block(struct qed_hwfn *p_hwfn, 62c59f5291SYuval Mintz struct qed_spq_entry *p_ent, 63c59f5291SYuval Mintz u8 *p_fw_ret, bool sleep_between_iter) 64c59f5291SYuval Mintz { 65c59f5291SYuval Mintz struct qed_spq_comp_done *comp_done; 66c59f5291SYuval Mintz u32 iter_cnt; 67c59f5291SYuval Mintz 68c59f5291SYuval Mintz comp_done = (struct qed_spq_comp_done *)p_ent->comp_cb.cookie; 69c59f5291SYuval Mintz iter_cnt = sleep_between_iter ? SPQ_BLOCK_SLEEP_MAX_ITER 70c59f5291SYuval Mintz : SPQ_BLOCK_DELAY_MAX_ITER; 71c59f5291SYuval Mintz 72c59f5291SYuval Mintz while (iter_cnt--) { 73c59f5291SYuval Mintz /* Validate we receive completion update */ 74cb7e125eSPaul E. McKenney if (smp_load_acquire(&comp_done->done) == 1) { /* ^^^ */ 75c59f5291SYuval Mintz if (p_fw_ret) 76c59f5291SYuval Mintz *p_fw_ret = comp_done->fw_return_code; 77c59f5291SYuval Mintz return 0; 78c59f5291SYuval Mintz } 79c59f5291SYuval Mintz 80c59f5291SYuval Mintz if (sleep_between_iter) 81c59f5291SYuval Mintz msleep(SPQ_BLOCK_SLEEP_MS); 82c59f5291SYuval Mintz else 83c59f5291SYuval Mintz udelay(SPQ_BLOCK_DELAY_US); 84c59f5291SYuval Mintz } 85c59f5291SYuval Mintz 86c59f5291SYuval Mintz return -EBUSY; 87c59f5291SYuval Mintz } 88c59f5291SYuval Mintz 89fe56b9e6SYuval Mintz static int qed_spq_block(struct qed_hwfn *p_hwfn, 90fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent, 91c59f5291SYuval Mintz u8 *p_fw_ret, bool skip_quick_poll) 92fe56b9e6SYuval Mintz { 93fe56b9e6SYuval Mintz struct qed_spq_comp_done *comp_done; 9415582962SRahul Verma struct qed_ptt *p_ptt; 95fe56b9e6SYuval Mintz int rc; 96fe56b9e6SYuval Mintz 97c59f5291SYuval Mintz /* A relatively short polling period w/o sleeping, to allow the FW to 98c59f5291SYuval Mintz * complete the ramrod and thus possibly to avoid the following sleeps. 99c59f5291SYuval Mintz */ 100c59f5291SYuval Mintz if (!skip_quick_poll) { 101c59f5291SYuval Mintz rc = __qed_spq_block(p_hwfn, p_ent, p_fw_ret, false); 102c59f5291SYuval Mintz if (!rc) 103fe56b9e6SYuval Mintz return 0; 104fe56b9e6SYuval Mintz } 105c59f5291SYuval Mintz 106c59f5291SYuval Mintz /* Move to polling with a sleeping period between iterations */ 107c59f5291SYuval Mintz rc = __qed_spq_block(p_hwfn, p_ent, p_fw_ret, true); 108c59f5291SYuval Mintz if (!rc) 109c59f5291SYuval Mintz return 0; 110fe56b9e6SYuval Mintz 11115582962SRahul Verma p_ptt = qed_ptt_acquire(p_hwfn); 11215582962SRahul Verma if (!p_ptt) { 11315582962SRahul Verma DP_NOTICE(p_hwfn, "ptt, failed to acquire\n"); 11415582962SRahul Verma return -EAGAIN; 11515582962SRahul Verma } 11615582962SRahul Verma 117fe56b9e6SYuval Mintz DP_INFO(p_hwfn, "Ramrod is stuck, requesting MCP drain\n"); 11815582962SRahul Verma rc = qed_mcp_drain(p_hwfn, p_ptt); 119fa5c448dSSagiv Ozeri qed_ptt_release(p_hwfn, p_ptt); 120c59f5291SYuval Mintz if (rc) { 121fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "MCP drain failed\n"); 122c59f5291SYuval Mintz goto err; 123c59f5291SYuval Mintz } 124fe56b9e6SYuval Mintz 125fe56b9e6SYuval Mintz /* Retry after drain */ 126c59f5291SYuval Mintz rc = __qed_spq_block(p_hwfn, p_ent, p_fw_ret, true); 127c59f5291SYuval Mintz if (!rc) 128fe56b9e6SYuval Mintz return 0; 12915582962SRahul Verma 130fa5c448dSSagiv Ozeri comp_done = (struct qed_spq_comp_done *)p_ent->comp_cb.cookie; 131fa5c448dSSagiv Ozeri if (comp_done->done == 1) { 132fa5c448dSSagiv Ozeri if (p_fw_ret) 133fa5c448dSSagiv Ozeri *p_fw_ret = comp_done->fw_return_code; 134fa5c448dSSagiv Ozeri return 0; 135fa5c448dSSagiv Ozeri } 136c59f5291SYuval Mintz err: 1372ec276d5SIgor Russkikh p_ptt = qed_ptt_acquire(p_hwfn); 1382ec276d5SIgor Russkikh if (!p_ptt) 1392ec276d5SIgor Russkikh return -EBUSY; 1402ec276d5SIgor Russkikh qed_hw_err_notify(p_hwfn, p_ptt, QED_HW_ERR_RAMROD_FAIL, 141c59f5291SYuval Mintz "Ramrod is stuck [CID %08x cmd %02x protocol %02x echo %04x]\n", 142c59f5291SYuval Mintz le32_to_cpu(p_ent->elem.hdr.cid), 143c59f5291SYuval Mintz p_ent->elem.hdr.cmd_id, 144c59f5291SYuval Mintz p_ent->elem.hdr.protocol_id, 145c59f5291SYuval Mintz le16_to_cpu(p_ent->elem.hdr.echo)); 1462ec276d5SIgor Russkikh qed_ptt_release(p_hwfn, p_ptt); 147fe56b9e6SYuval Mintz 148fe56b9e6SYuval Mintz return -EBUSY; 149fe56b9e6SYuval Mintz } 150fe56b9e6SYuval Mintz 151fe56b9e6SYuval Mintz /*************************************************************************** 152fe56b9e6SYuval Mintz * SPQ entries inner API 153fe56b9e6SYuval Mintz ***************************************************************************/ 1541a635e48SYuval Mintz static int qed_spq_fill_entry(struct qed_hwfn *p_hwfn, 155fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent) 156fe56b9e6SYuval Mintz { 157fe56b9e6SYuval Mintz p_ent->flags = 0; 158fe56b9e6SYuval Mintz 159fe56b9e6SYuval Mintz switch (p_ent->comp_mode) { 160fe56b9e6SYuval Mintz case QED_SPQ_MODE_EBLOCK: 161fe56b9e6SYuval Mintz case QED_SPQ_MODE_BLOCK: 162fe56b9e6SYuval Mintz p_ent->comp_cb.function = qed_spq_blocking_cb; 163fe56b9e6SYuval Mintz break; 164fe56b9e6SYuval Mintz case QED_SPQ_MODE_CB: 165fe56b9e6SYuval Mintz break; 166fe56b9e6SYuval Mintz default: 167fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Unknown SPQE completion mode %d\n", 168fe56b9e6SYuval Mintz p_ent->comp_mode); 169fe56b9e6SYuval Mintz return -EINVAL; 170fe56b9e6SYuval Mintz } 171fe56b9e6SYuval Mintz 172fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 173fe56b9e6SYuval Mintz "Ramrod header: [CID 0x%08x CMD 0x%02x protocol 0x%02x] Data pointer: [%08x:%08x] Completion Mode: %s\n", 174fe56b9e6SYuval Mintz p_ent->elem.hdr.cid, 175fe56b9e6SYuval Mintz p_ent->elem.hdr.cmd_id, 176fe56b9e6SYuval Mintz p_ent->elem.hdr.protocol_id, 177fe56b9e6SYuval Mintz p_ent->elem.data_ptr.hi, 178fe56b9e6SYuval Mintz p_ent->elem.data_ptr.lo, 179fe56b9e6SYuval Mintz D_TRINE(p_ent->comp_mode, QED_SPQ_MODE_EBLOCK, 180fe56b9e6SYuval Mintz QED_SPQ_MODE_BLOCK, "MODE_EBLOCK", "MODE_BLOCK", 181fe56b9e6SYuval Mintz "MODE_CB")); 182fe56b9e6SYuval Mintz 183fe56b9e6SYuval Mintz return 0; 184fe56b9e6SYuval Mintz } 185fe56b9e6SYuval Mintz 186fe56b9e6SYuval Mintz /*************************************************************************** 187fe56b9e6SYuval Mintz * HSI access 188fe56b9e6SYuval Mintz ***************************************************************************/ 189fe56b9e6SYuval Mintz static void qed_spq_hw_initialize(struct qed_hwfn *p_hwfn, 190fe56b9e6SYuval Mintz struct qed_spq *p_spq) 191fe56b9e6SYuval Mintz { 192*fb09a1edSShai Malin struct core_conn_context *p_cxt; 193b5a9ee7cSAriel Elior struct qed_cxt_info cxt_info; 194b5a9ee7cSAriel Elior u16 physical_q; 195fe56b9e6SYuval Mintz int rc; 196fe56b9e6SYuval Mintz 197fe56b9e6SYuval Mintz cxt_info.iid = p_spq->cid; 198fe56b9e6SYuval Mintz 199fe56b9e6SYuval Mintz rc = qed_cxt_get_cid_info(p_hwfn, &cxt_info); 200fe56b9e6SYuval Mintz 201fe56b9e6SYuval Mintz if (rc < 0) { 202fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Cannot find context info for cid=%d\n", 203fe56b9e6SYuval Mintz p_spq->cid); 204fe56b9e6SYuval Mintz return; 205fe56b9e6SYuval Mintz } 206fe56b9e6SYuval Mintz 207fe56b9e6SYuval Mintz p_cxt = cxt_info.p_cxt; 208fe56b9e6SYuval Mintz 209fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags10, 210*fb09a1edSShai Malin XSTORM_CORE_CONN_AG_CTX_DQ_CF_EN, 1); 211fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags1, 212*fb09a1edSShai Malin XSTORM_CORE_CONN_AG_CTX_DQ_CF_ACTIVE, 1); 213fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags9, 214*fb09a1edSShai Malin XSTORM_CORE_CONN_AG_CTX_CONSOLID_PROD_CF_EN, 1); 215fe56b9e6SYuval Mintz 216fe56b9e6SYuval Mintz /* QM physical queue */ 217b5a9ee7cSAriel Elior physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB); 218b5a9ee7cSAriel Elior p_cxt->xstorm_ag_context.physical_q0 = cpu_to_le16(physical_q); 219fe56b9e6SYuval Mintz 220fe56b9e6SYuval Mintz p_cxt->xstorm_st_context.spq_base_lo = 221fe56b9e6SYuval Mintz DMA_LO_LE(p_spq->chain.p_phys_addr); 222fe56b9e6SYuval Mintz p_cxt->xstorm_st_context.spq_base_hi = 223fe56b9e6SYuval Mintz DMA_HI_LE(p_spq->chain.p_phys_addr); 224fe56b9e6SYuval Mintz 22594494598SYuval Mintz DMA_REGPAIR_LE(p_cxt->xstorm_st_context.consolid_base_addr, 22694494598SYuval Mintz p_hwfn->p_consq->chain.p_phys_addr); 227fe56b9e6SYuval Mintz } 228fe56b9e6SYuval Mintz 229fe56b9e6SYuval Mintz static int qed_spq_hw_post(struct qed_hwfn *p_hwfn, 2301a635e48SYuval Mintz struct qed_spq *p_spq, struct qed_spq_entry *p_ent) 231fe56b9e6SYuval Mintz { 232fe56b9e6SYuval Mintz struct qed_chain *p_chain = &p_hwfn->p_spq->chain; 2339ecd8c3fSAriel Elior struct core_db_data *p_db_data = &p_spq->db_data; 23476a9a364STomer Tayar u16 echo = qed_chain_get_prod_idx(p_chain); 235fe56b9e6SYuval Mintz struct slow_path_element *elem; 236fe56b9e6SYuval Mintz 23776a9a364STomer Tayar p_ent->elem.hdr.echo = cpu_to_le16(echo); 238fe56b9e6SYuval Mintz elem = qed_chain_produce(p_chain); 239fe56b9e6SYuval Mintz if (!elem) { 240fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Failed to produce from SPQ chain\n"); 241fe56b9e6SYuval Mintz return -EINVAL; 242fe56b9e6SYuval Mintz } 243fe56b9e6SYuval Mintz 244fe56b9e6SYuval Mintz *elem = p_ent->elem; /* struct assignment */ 245fe56b9e6SYuval Mintz 246fe56b9e6SYuval Mintz /* send a doorbell on the slow hwfn session */ 2479ecd8c3fSAriel Elior p_db_data->spq_prod = cpu_to_le16(qed_chain_get_prod_idx(p_chain)); 248fe56b9e6SYuval Mintz 24934c7bb47SSudarsana Reddy Kalluru /* make sure the SPQE is updated before the doorbell */ 25034c7bb47SSudarsana Reddy Kalluru wmb(); 251fe56b9e6SYuval Mintz 2529ecd8c3fSAriel Elior DOORBELL(p_hwfn, p_spq->db_addr_offset, *(u32 *)p_db_data); 253fe56b9e6SYuval Mintz 254fe56b9e6SYuval Mintz /* make sure doorbell is rang */ 25534c7bb47SSudarsana Reddy Kalluru wmb(); 256fe56b9e6SYuval Mintz 257fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 258fe56b9e6SYuval Mintz "Doorbelled [0x%08x, CID 0x%08x] with Flags: %02x agg_params: %02x, prod: %04x\n", 2599ecd8c3fSAriel Elior p_spq->db_addr_offset, 2609ecd8c3fSAriel Elior p_spq->cid, 2619ecd8c3fSAriel Elior p_db_data->params, 2629ecd8c3fSAriel Elior p_db_data->agg_flags, 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 { 2746c9e80eaSMichal Kalderon qed_spq_async_comp_cb cb; 2756c9e80eaSMichal Kalderon 2766c9e80eaSMichal Kalderon if (!p_hwfn->p_spq || (p_eqe->protocol_id >= MAX_PROTOCOL_TYPE)) 277fc831825SYuval Mintz return -EINVAL; 278fc831825SYuval Mintz 2796c9e80eaSMichal Kalderon cb = p_hwfn->p_spq->async_comp_cb[p_eqe->protocol_id]; 2806c9e80eaSMichal Kalderon if (cb) { 2816c9e80eaSMichal Kalderon return cb(p_hwfn, p_eqe->opcode, p_eqe->echo, 2826c9e80eaSMichal Kalderon &p_eqe->data, p_eqe->fw_return_code); 283fc831825SYuval Mintz } else { 284fc831825SYuval Mintz DP_NOTICE(p_hwfn, 285fe56b9e6SYuval Mintz "Unknown Async completion for protocol: %d\n", 286fe56b9e6SYuval Mintz p_eqe->protocol_id); 287fe56b9e6SYuval Mintz return -EINVAL; 288fe56b9e6SYuval Mintz } 28937bff2b9SYuval Mintz } 290fe56b9e6SYuval Mintz 2916c9e80eaSMichal Kalderon int 2926c9e80eaSMichal Kalderon qed_spq_register_async_cb(struct qed_hwfn *p_hwfn, 2936c9e80eaSMichal Kalderon enum protocol_type protocol_id, 2946c9e80eaSMichal Kalderon qed_spq_async_comp_cb cb) 2956c9e80eaSMichal Kalderon { 2966c9e80eaSMichal Kalderon if (!p_hwfn->p_spq || (protocol_id >= MAX_PROTOCOL_TYPE)) 2976c9e80eaSMichal Kalderon return -EINVAL; 2986c9e80eaSMichal Kalderon 2996c9e80eaSMichal Kalderon p_hwfn->p_spq->async_comp_cb[protocol_id] = cb; 3006c9e80eaSMichal Kalderon return 0; 3016c9e80eaSMichal Kalderon } 3026c9e80eaSMichal Kalderon 3036c9e80eaSMichal Kalderon void 3046c9e80eaSMichal Kalderon qed_spq_unregister_async_cb(struct qed_hwfn *p_hwfn, 3056c9e80eaSMichal Kalderon enum protocol_type protocol_id) 3066c9e80eaSMichal Kalderon { 3076c9e80eaSMichal Kalderon if (!p_hwfn->p_spq || (protocol_id >= MAX_PROTOCOL_TYPE)) 3086c9e80eaSMichal Kalderon return; 3096c9e80eaSMichal Kalderon 3106c9e80eaSMichal Kalderon p_hwfn->p_spq->async_comp_cb[protocol_id] = NULL; 3116c9e80eaSMichal Kalderon } 3126c9e80eaSMichal Kalderon 313fe56b9e6SYuval Mintz /*************************************************************************** 314fe56b9e6SYuval Mintz * EQ API 315fe56b9e6SYuval Mintz ***************************************************************************/ 3161a635e48SYuval Mintz void qed_eq_prod_update(struct qed_hwfn *p_hwfn, u16 prod) 317fe56b9e6SYuval Mintz { 318fe56b9e6SYuval Mintz u32 addr = GTT_BAR0_MAP_REG_USDM_RAM + 319fe56b9e6SYuval Mintz USTORM_EQE_CONS_OFFSET(p_hwfn->rel_pf_id); 320fe56b9e6SYuval Mintz 321fe56b9e6SYuval Mintz REG_WR16(p_hwfn, addr, prod); 322fe56b9e6SYuval Mintz } 323fe56b9e6SYuval Mintz 3241a635e48SYuval Mintz int qed_eq_completion(struct qed_hwfn *p_hwfn, void *cookie) 325fe56b9e6SYuval Mintz { 326fe56b9e6SYuval Mintz struct qed_eq *p_eq = cookie; 327fe56b9e6SYuval Mintz struct qed_chain *p_chain = &p_eq->chain; 328fe56b9e6SYuval Mintz int rc = 0; 329fe56b9e6SYuval Mintz 330fe56b9e6SYuval Mintz /* take a snapshot of the FW consumer */ 331fe56b9e6SYuval Mintz u16 fw_cons_idx = le16_to_cpu(*p_eq->p_fw_cons); 332fe56b9e6SYuval Mintz 333fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, "fw_cons_idx %x\n", fw_cons_idx); 334fe56b9e6SYuval Mintz 335fe56b9e6SYuval Mintz /* Need to guarantee the fw_cons index we use points to a usuable 336fe56b9e6SYuval Mintz * element (to comply with our chain), so our macros would comply 337fe56b9e6SYuval Mintz */ 338fe56b9e6SYuval Mintz if ((fw_cons_idx & qed_chain_get_usable_per_page(p_chain)) == 339fe56b9e6SYuval Mintz qed_chain_get_usable_per_page(p_chain)) 340fe56b9e6SYuval Mintz fw_cons_idx += qed_chain_get_unusable_per_page(p_chain); 341fe56b9e6SYuval Mintz 342fe56b9e6SYuval Mintz /* Complete current segment of eq entries */ 343fe56b9e6SYuval Mintz while (fw_cons_idx != qed_chain_get_cons_idx(p_chain)) { 344fe56b9e6SYuval Mintz struct event_ring_entry *p_eqe = qed_chain_consume(p_chain); 345fe56b9e6SYuval Mintz 346fe56b9e6SYuval Mintz if (!p_eqe) { 347fe56b9e6SYuval Mintz rc = -EINVAL; 348fe56b9e6SYuval Mintz break; 349fe56b9e6SYuval Mintz } 350fe56b9e6SYuval Mintz 351fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 352fe56b9e6SYuval Mintz "op %x prot %x res0 %x echo %x fwret %x flags %x\n", 353fe56b9e6SYuval Mintz p_eqe->opcode, 354fe56b9e6SYuval Mintz p_eqe->protocol_id, 355fe56b9e6SYuval Mintz p_eqe->reserved0, 356fe56b9e6SYuval Mintz le16_to_cpu(p_eqe->echo), 357fe56b9e6SYuval Mintz p_eqe->fw_return_code, 358fe56b9e6SYuval Mintz p_eqe->flags); 359fe56b9e6SYuval Mintz 360fe56b9e6SYuval Mintz if (GET_FIELD(p_eqe->flags, EVENT_RING_ENTRY_ASYNC)) { 361fe56b9e6SYuval Mintz if (qed_async_event_completion(p_hwfn, p_eqe)) 362fe56b9e6SYuval Mintz rc = -EINVAL; 363fe56b9e6SYuval Mintz } else if (qed_spq_completion(p_hwfn, 364fe56b9e6SYuval Mintz p_eqe->echo, 365fe56b9e6SYuval Mintz p_eqe->fw_return_code, 366fe56b9e6SYuval Mintz &p_eqe->data)) { 367fe56b9e6SYuval Mintz rc = -EINVAL; 368fe56b9e6SYuval Mintz } 369fe56b9e6SYuval Mintz 370fe56b9e6SYuval Mintz qed_chain_recycle_consumed(p_chain); 371fe56b9e6SYuval Mintz } 372fe56b9e6SYuval Mintz 373fe56b9e6SYuval Mintz qed_eq_prod_update(p_hwfn, qed_chain_get_prod_idx(p_chain)); 374fe56b9e6SYuval Mintz 375660492bcSManish Chopra /* Attempt to post pending requests */ 376660492bcSManish Chopra spin_lock_bh(&p_hwfn->p_spq->lock); 377660492bcSManish Chopra rc = qed_spq_pend_post(p_hwfn); 378660492bcSManish Chopra spin_unlock_bh(&p_hwfn->p_spq->lock); 379660492bcSManish Chopra 380fe56b9e6SYuval Mintz return rc; 381fe56b9e6SYuval Mintz } 382fe56b9e6SYuval Mintz 3833587cb87STomer Tayar int qed_eq_alloc(struct qed_hwfn *p_hwfn, u16 num_elem) 384fe56b9e6SYuval Mintz { 385b6db3f71SAlexander Lobakin struct qed_chain_init_params params = { 386b6db3f71SAlexander Lobakin .mode = QED_CHAIN_MODE_PBL, 387b6db3f71SAlexander Lobakin .intended_use = QED_CHAIN_USE_TO_PRODUCE, 388b6db3f71SAlexander Lobakin .cnt_type = QED_CHAIN_CNT_TYPE_U16, 389b6db3f71SAlexander Lobakin .num_elems = num_elem, 390b6db3f71SAlexander Lobakin .elem_size = sizeof(union event_ring_element), 391b6db3f71SAlexander Lobakin }; 392fe56b9e6SYuval Mintz struct qed_eq *p_eq; 393b6db3f71SAlexander Lobakin int ret; 394fe56b9e6SYuval Mintz 395fe56b9e6SYuval Mintz /* Allocate EQ struct */ 39660fffb3bSYuval Mintz p_eq = kzalloc(sizeof(*p_eq), GFP_KERNEL); 3972591c280SJoe Perches if (!p_eq) 3983587cb87STomer Tayar return -ENOMEM; 399fe56b9e6SYuval Mintz 400b6db3f71SAlexander Lobakin ret = qed_chain_alloc(p_hwfn->cdev, &p_eq->chain, ¶ms); 401b6db3f71SAlexander Lobakin if (ret) { 402b6db3f71SAlexander Lobakin DP_NOTICE(p_hwfn, "Failed to allocate EQ chain\n"); 403fe56b9e6SYuval Mintz goto eq_allocate_fail; 404b6db3f71SAlexander Lobakin } 405fe56b9e6SYuval Mintz 406fe56b9e6SYuval Mintz /* register EQ completion on the SP SB */ 4071a635e48SYuval Mintz qed_int_register_cb(p_hwfn, qed_eq_completion, 4081a635e48SYuval Mintz p_eq, &p_eq->eq_sb_index, &p_eq->p_fw_cons); 409fe56b9e6SYuval Mintz 4103587cb87STomer Tayar p_hwfn->p_eq = p_eq; 4113587cb87STomer Tayar return 0; 412fe56b9e6SYuval Mintz 413fe56b9e6SYuval Mintz eq_allocate_fail: 414fe56b9e6SYuval Mintz kfree(p_eq); 415b6db3f71SAlexander Lobakin 416b6db3f71SAlexander Lobakin return ret; 4173587cb87STomer Tayar } 4183587cb87STomer Tayar 4193587cb87STomer Tayar void qed_eq_setup(struct qed_hwfn *p_hwfn) 4203587cb87STomer Tayar { 4213587cb87STomer Tayar qed_chain_reset(&p_hwfn->p_eq->chain); 4223587cb87STomer Tayar } 4233587cb87STomer Tayar 4243587cb87STomer Tayar void qed_eq_free(struct qed_hwfn *p_hwfn) 4253587cb87STomer Tayar { 4263587cb87STomer Tayar if (!p_hwfn->p_eq) 4273587cb87STomer Tayar return; 4283587cb87STomer Tayar 4293587cb87STomer Tayar qed_chain_free(p_hwfn->cdev, &p_hwfn->p_eq->chain); 4303587cb87STomer Tayar 4313587cb87STomer Tayar kfree(p_hwfn->p_eq); 4323587cb87STomer Tayar p_hwfn->p_eq = NULL; 433fe56b9e6SYuval Mintz } 434fe56b9e6SYuval Mintz 435fe56b9e6SYuval Mintz /*************************************************************************** 436cee4d264SManish Chopra * CQE API - manipulate EQ functionality 437cee4d264SManish Chopra ***************************************************************************/ 4381a635e48SYuval Mintz static int qed_cqe_completion(struct qed_hwfn *p_hwfn, 439cee4d264SManish Chopra struct eth_slow_path_rx_cqe *cqe, 440cee4d264SManish Chopra enum protocol_type protocol) 441cee4d264SManish Chopra { 4421408cc1fSYuval Mintz if (IS_VF(p_hwfn->cdev)) 4431408cc1fSYuval Mintz return 0; 4441408cc1fSYuval Mintz 445cee4d264SManish Chopra /* @@@tmp - it's possible we'll eventually want to handle some 446cee4d264SManish Chopra * actual commands that can arrive here, but for now this is only 447cee4d264SManish Chopra * used to complete the ramrod using the echo value on the cqe 448cee4d264SManish Chopra */ 449cee4d264SManish Chopra return qed_spq_completion(p_hwfn, cqe->echo, 0, NULL); 450cee4d264SManish Chopra } 451cee4d264SManish Chopra 452cee4d264SManish Chopra int qed_eth_cqe_completion(struct qed_hwfn *p_hwfn, 453cee4d264SManish Chopra struct eth_slow_path_rx_cqe *cqe) 454cee4d264SManish Chopra { 455cee4d264SManish Chopra int rc; 456cee4d264SManish Chopra 457cee4d264SManish Chopra rc = qed_cqe_completion(p_hwfn, cqe, PROTOCOLID_ETH); 458cee4d264SManish Chopra if (rc) 459cee4d264SManish Chopra DP_NOTICE(p_hwfn, 460cee4d264SManish Chopra "Failed to handle RXQ CQE [cmd 0x%02x]\n", 461cee4d264SManish Chopra cqe->ramrod_cmd_id); 462cee4d264SManish Chopra 463cee4d264SManish Chopra return rc; 464cee4d264SManish Chopra } 465cee4d264SManish Chopra 466cee4d264SManish Chopra /*************************************************************************** 467fe56b9e6SYuval Mintz * Slow hwfn Queue (spq) 468fe56b9e6SYuval Mintz ***************************************************************************/ 469fe56b9e6SYuval Mintz void qed_spq_setup(struct qed_hwfn *p_hwfn) 470fe56b9e6SYuval Mintz { 471fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 472fe56b9e6SYuval Mintz struct qed_spq_entry *p_virt = NULL; 4739ecd8c3fSAriel Elior struct core_db_data *p_db_data; 4749ecd8c3fSAriel Elior void __iomem *db_addr; 475fe56b9e6SYuval Mintz dma_addr_t p_phys = 0; 476a91eb52aSYuval Mintz u32 i, capacity; 4779ecd8c3fSAriel Elior int rc; 478fe56b9e6SYuval Mintz 479fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->pending); 480fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->completion_pending); 481fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->free_pool); 482fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->unlimited_pending); 483fe56b9e6SYuval Mintz spin_lock_init(&p_spq->lock); 484fe56b9e6SYuval Mintz 485fe56b9e6SYuval Mintz /* SPQ empty pool */ 486fe56b9e6SYuval Mintz p_phys = p_spq->p_phys + offsetof(struct qed_spq_entry, ramrod); 487fe56b9e6SYuval Mintz p_virt = p_spq->p_virt; 488fe56b9e6SYuval Mintz 489a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 490a91eb52aSYuval Mintz for (i = 0; i < capacity; i++) { 49194494598SYuval Mintz DMA_REGPAIR_LE(p_virt->elem.data_ptr, p_phys); 492fe56b9e6SYuval Mintz 493fe56b9e6SYuval Mintz list_add_tail(&p_virt->list, &p_spq->free_pool); 494fe56b9e6SYuval Mintz 495fe56b9e6SYuval Mintz p_virt++; 496fe56b9e6SYuval Mintz p_phys += sizeof(struct qed_spq_entry); 497fe56b9e6SYuval Mintz } 498fe56b9e6SYuval Mintz 499fe56b9e6SYuval Mintz /* Statistics */ 500fe56b9e6SYuval Mintz p_spq->normal_count = 0; 501fe56b9e6SYuval Mintz p_spq->comp_count = 0; 502fe56b9e6SYuval Mintz p_spq->comp_sent_count = 0; 503fe56b9e6SYuval Mintz p_spq->unlimited_pending_count = 0; 50476a9a364STomer Tayar 50576a9a364STomer Tayar bitmap_zero(p_spq->p_comp_bitmap, SPQ_RING_SIZE); 50676a9a364STomer Tayar p_spq->comp_bitmap_idx = 0; 507fe56b9e6SYuval Mintz 508fe56b9e6SYuval Mintz /* SPQ cid, cannot fail */ 509fe56b9e6SYuval Mintz qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_spq->cid); 510fe56b9e6SYuval Mintz qed_spq_hw_initialize(p_hwfn, p_spq); 511fe56b9e6SYuval Mintz 512fe56b9e6SYuval Mintz /* reset the chain itself */ 513fe56b9e6SYuval Mintz qed_chain_reset(&p_spq->chain); 5149ecd8c3fSAriel Elior 5159ecd8c3fSAriel Elior /* Initialize the address/data of the SPQ doorbell */ 5169ecd8c3fSAriel Elior p_spq->db_addr_offset = qed_db_addr(p_spq->cid, DQ_DEMS_LEGACY); 5179ecd8c3fSAriel Elior p_db_data = &p_spq->db_data; 5189ecd8c3fSAriel Elior memset(p_db_data, 0, sizeof(*p_db_data)); 5199ecd8c3fSAriel Elior SET_FIELD(p_db_data->params, CORE_DB_DATA_DEST, DB_DEST_XCM); 5209ecd8c3fSAriel Elior SET_FIELD(p_db_data->params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_MAX); 5219ecd8c3fSAriel Elior SET_FIELD(p_db_data->params, CORE_DB_DATA_AGG_VAL_SEL, 5229ecd8c3fSAriel Elior DQ_XCM_CORE_SPQ_PROD_CMD); 5239ecd8c3fSAriel Elior p_db_data->agg_flags = DQ_XCM_CORE_DQ_CF_CMD; 5249ecd8c3fSAriel Elior 5259ecd8c3fSAriel Elior /* Register the SPQ doorbell with the doorbell recovery mechanism */ 5269ecd8c3fSAriel Elior db_addr = (void __iomem *)((u8 __iomem *)p_hwfn->doorbells + 5279ecd8c3fSAriel Elior p_spq->db_addr_offset); 5289ecd8c3fSAriel Elior rc = qed_db_recovery_add(p_hwfn->cdev, db_addr, &p_spq->db_data, 5299ecd8c3fSAriel Elior DB_REC_WIDTH_32B, DB_REC_KERNEL); 5309ecd8c3fSAriel Elior if (rc) 5319ecd8c3fSAriel Elior DP_INFO(p_hwfn, 5329ecd8c3fSAriel Elior "Failed to register the SPQ doorbell with the doorbell recovery mechanism\n"); 533fe56b9e6SYuval Mintz } 534fe56b9e6SYuval Mintz 535fe56b9e6SYuval Mintz int qed_spq_alloc(struct qed_hwfn *p_hwfn) 536fe56b9e6SYuval Mintz { 537b6db3f71SAlexander Lobakin struct qed_chain_init_params params = { 538b6db3f71SAlexander Lobakin .mode = QED_CHAIN_MODE_SINGLE, 539b6db3f71SAlexander Lobakin .intended_use = QED_CHAIN_USE_TO_PRODUCE, 540b6db3f71SAlexander Lobakin .cnt_type = QED_CHAIN_CNT_TYPE_U16, 541b6db3f71SAlexander Lobakin .elem_size = sizeof(struct slow_path_element), 542b6db3f71SAlexander Lobakin }; 543b6db3f71SAlexander Lobakin struct qed_dev *cdev = p_hwfn->cdev; 544a91eb52aSYuval Mintz struct qed_spq_entry *p_virt = NULL; 545fe56b9e6SYuval Mintz struct qed_spq *p_spq = NULL; 546fe56b9e6SYuval Mintz dma_addr_t p_phys = 0; 547a91eb52aSYuval Mintz u32 capacity; 548b6db3f71SAlexander Lobakin int ret; 549fe56b9e6SYuval Mintz 550fe56b9e6SYuval Mintz /* SPQ struct */ 5511a635e48SYuval Mintz p_spq = kzalloc(sizeof(struct qed_spq), GFP_KERNEL); 5522591c280SJoe Perches if (!p_spq) 553fe56b9e6SYuval Mintz return -ENOMEM; 554fe56b9e6SYuval Mintz 555fe56b9e6SYuval Mintz /* SPQ ring */ 556b6db3f71SAlexander Lobakin ret = qed_chain_alloc(cdev, &p_spq->chain, ¶ms); 557b6db3f71SAlexander Lobakin if (ret) { 558b6db3f71SAlexander Lobakin DP_NOTICE(p_hwfn, "Failed to allocate SPQ chain\n"); 559b6db3f71SAlexander Lobakin goto spq_chain_alloc_fail; 560b6db3f71SAlexander Lobakin } 561fe56b9e6SYuval Mintz 562fe56b9e6SYuval Mintz /* allocate and fill the SPQ elements (incl. ramrod data list) */ 563a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 564b6db3f71SAlexander Lobakin ret = -ENOMEM; 565b6db3f71SAlexander Lobakin 566b6db3f71SAlexander Lobakin p_virt = dma_alloc_coherent(&cdev->pdev->dev, 5672591c280SJoe Perches capacity * sizeof(struct qed_spq_entry), 568a91eb52aSYuval Mintz &p_phys, GFP_KERNEL); 569fe56b9e6SYuval Mintz if (!p_virt) 570b6db3f71SAlexander Lobakin goto spq_alloc_fail; 571fe56b9e6SYuval Mintz 572fe56b9e6SYuval Mintz p_spq->p_virt = p_virt; 573fe56b9e6SYuval Mintz p_spq->p_phys = p_phys; 574fe56b9e6SYuval Mintz p_hwfn->p_spq = p_spq; 575fe56b9e6SYuval Mintz 576fe56b9e6SYuval Mintz return 0; 577fe56b9e6SYuval Mintz 578b6db3f71SAlexander Lobakin spq_alloc_fail: 579b6db3f71SAlexander Lobakin qed_chain_free(cdev, &p_spq->chain); 580b6db3f71SAlexander Lobakin spq_chain_alloc_fail: 581fe56b9e6SYuval Mintz kfree(p_spq); 582b6db3f71SAlexander Lobakin 583b6db3f71SAlexander Lobakin return ret; 584fe56b9e6SYuval Mintz } 585fe56b9e6SYuval Mintz 586fe56b9e6SYuval Mintz void qed_spq_free(struct qed_hwfn *p_hwfn) 587fe56b9e6SYuval Mintz { 588fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 5899ecd8c3fSAriel Elior void __iomem *db_addr; 590a91eb52aSYuval Mintz u32 capacity; 591fe56b9e6SYuval Mintz 592fe56b9e6SYuval Mintz if (!p_spq) 593fe56b9e6SYuval Mintz return; 594fe56b9e6SYuval Mintz 5959ecd8c3fSAriel Elior /* Delete the SPQ doorbell from the doorbell recovery mechanism */ 5969ecd8c3fSAriel Elior db_addr = (void __iomem *)((u8 __iomem *)p_hwfn->doorbells + 5979ecd8c3fSAriel Elior p_spq->db_addr_offset); 5989ecd8c3fSAriel Elior qed_db_recovery_del(p_hwfn->cdev, db_addr, &p_spq->db_data); 5999ecd8c3fSAriel Elior 600a91eb52aSYuval Mintz if (p_spq->p_virt) { 601a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 602fe56b9e6SYuval Mintz dma_free_coherent(&p_hwfn->cdev->pdev->dev, 603a91eb52aSYuval Mintz capacity * 604fe56b9e6SYuval Mintz sizeof(struct qed_spq_entry), 605a91eb52aSYuval Mintz p_spq->p_virt, p_spq->p_phys); 606a91eb52aSYuval Mintz } 607fe56b9e6SYuval Mintz 608fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_spq->chain); 609fe56b9e6SYuval Mintz kfree(p_spq); 6103587cb87STomer Tayar p_hwfn->p_spq = NULL; 611fe56b9e6SYuval Mintz } 612fe56b9e6SYuval Mintz 6131a635e48SYuval Mintz int qed_spq_get_entry(struct qed_hwfn *p_hwfn, struct qed_spq_entry **pp_ent) 614fe56b9e6SYuval Mintz { 615fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 616fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 617fe56b9e6SYuval Mintz int rc = 0; 618fe56b9e6SYuval Mintz 619fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 620fe56b9e6SYuval Mintz 621fe56b9e6SYuval Mintz if (list_empty(&p_spq->free_pool)) { 622fe56b9e6SYuval Mintz p_ent = kzalloc(sizeof(*p_ent), GFP_ATOMIC); 623fe56b9e6SYuval Mintz if (!p_ent) { 6241a635e48SYuval Mintz DP_NOTICE(p_hwfn, 6251a635e48SYuval Mintz "Failed to allocate an SPQ entry for a pending ramrod\n"); 626fe56b9e6SYuval Mintz rc = -ENOMEM; 627fe56b9e6SYuval Mintz goto out_unlock; 628fe56b9e6SYuval Mintz } 629fe56b9e6SYuval Mintz p_ent->queue = &p_spq->unlimited_pending; 630fe56b9e6SYuval Mintz } else { 631fe56b9e6SYuval Mintz p_ent = list_first_entry(&p_spq->free_pool, 6321a635e48SYuval Mintz struct qed_spq_entry, list); 633fe56b9e6SYuval Mintz list_del(&p_ent->list); 634fe56b9e6SYuval Mintz p_ent->queue = &p_spq->pending; 635fe56b9e6SYuval Mintz } 636fe56b9e6SYuval Mintz 637fe56b9e6SYuval Mintz *pp_ent = p_ent; 638fe56b9e6SYuval Mintz 639fe56b9e6SYuval Mintz out_unlock: 640fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 641fe56b9e6SYuval Mintz return rc; 642fe56b9e6SYuval Mintz } 643fe56b9e6SYuval Mintz 644fe56b9e6SYuval Mintz /* Locked variant; Should be called while the SPQ lock is taken */ 645fe56b9e6SYuval Mintz static void __qed_spq_return_entry(struct qed_hwfn *p_hwfn, 646fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent) 647fe56b9e6SYuval Mintz { 648fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_hwfn->p_spq->free_pool); 649fe56b9e6SYuval Mintz } 650fe56b9e6SYuval Mintz 6511a635e48SYuval Mintz void qed_spq_return_entry(struct qed_hwfn *p_hwfn, struct qed_spq_entry *p_ent) 652fe56b9e6SYuval Mintz { 653fe56b9e6SYuval Mintz spin_lock_bh(&p_hwfn->p_spq->lock); 654fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 655fe56b9e6SYuval Mintz spin_unlock_bh(&p_hwfn->p_spq->lock); 656fe56b9e6SYuval Mintz } 657fe56b9e6SYuval Mintz 658fe56b9e6SYuval Mintz /** 65971e11a3fSAlexander Lobakin * qed_spq_add_entry() - Add a new entry to the pending list. 66071e11a3fSAlexander Lobakin * Should be used while lock is being held. 661fe56b9e6SYuval Mintz * 66271e11a3fSAlexander Lobakin * @p_hwfn: HW device data. 66371e11a3fSAlexander Lobakin * @p_ent: An entry to add. 66471e11a3fSAlexander Lobakin * @priority: Desired priority. 66571e11a3fSAlexander Lobakin * 66671e11a3fSAlexander Lobakin * Adds an entry to the pending list is there is room (an empty 667fe56b9e6SYuval Mintz * element is available in the free_pool), or else places the 668fe56b9e6SYuval Mintz * entry in the unlimited_pending pool. 669fe56b9e6SYuval Mintz * 67071e11a3fSAlexander Lobakin * Return: zero on success, -EINVAL on invalid @priority. 671fe56b9e6SYuval Mintz */ 6721a635e48SYuval Mintz static int qed_spq_add_entry(struct qed_hwfn *p_hwfn, 673fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent, 674fe56b9e6SYuval Mintz enum spq_priority priority) 675fe56b9e6SYuval Mintz { 676fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 677fe56b9e6SYuval Mintz 678fe56b9e6SYuval Mintz if (p_ent->queue == &p_spq->unlimited_pending) { 679fe56b9e6SYuval Mintz 680fe56b9e6SYuval Mintz if (list_empty(&p_spq->free_pool)) { 681fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->unlimited_pending); 682fe56b9e6SYuval Mintz p_spq->unlimited_pending_count++; 683fe56b9e6SYuval Mintz 684fe56b9e6SYuval Mintz return 0; 68576a9a364STomer Tayar } else { 68676a9a364STomer Tayar struct qed_spq_entry *p_en2; 687fe56b9e6SYuval Mintz 688fe56b9e6SYuval Mintz p_en2 = list_first_entry(&p_spq->free_pool, 6891a635e48SYuval Mintz struct qed_spq_entry, list); 690fe56b9e6SYuval Mintz list_del(&p_en2->list); 691fe56b9e6SYuval Mintz 69276a9a364STomer Tayar /* Copy the ring element physical pointer to the new 69376a9a364STomer Tayar * entry, since we are about to override the entire ring 69476a9a364STomer Tayar * entry and don't want to lose the pointer. 69576a9a364STomer Tayar */ 69676a9a364STomer Tayar p_ent->elem.data_ptr = p_en2->elem.data_ptr; 69776a9a364STomer Tayar 698fe56b9e6SYuval Mintz *p_en2 = *p_ent; 699fe56b9e6SYuval Mintz 700db511c37SYuval Mintz /* EBLOCK responsible to free the allocated p_ent */ 701db511c37SYuval Mintz if (p_ent->comp_mode != QED_SPQ_MODE_EBLOCK) 702fe56b9e6SYuval Mintz kfree(p_ent); 7032632f22eSDenis Bolotin else 7042632f22eSDenis Bolotin p_ent->post_ent = p_en2; 705fe56b9e6SYuval Mintz 706fe56b9e6SYuval Mintz p_ent = p_en2; 707fe56b9e6SYuval Mintz } 70876a9a364STomer Tayar } 709fe56b9e6SYuval Mintz 710fe56b9e6SYuval Mintz /* entry is to be placed in 'pending' queue */ 711fe56b9e6SYuval Mintz switch (priority) { 712fe56b9e6SYuval Mintz case QED_SPQ_PRIORITY_NORMAL: 713fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->pending); 714fe56b9e6SYuval Mintz p_spq->normal_count++; 715fe56b9e6SYuval Mintz break; 716fe56b9e6SYuval Mintz case QED_SPQ_PRIORITY_HIGH: 717fe56b9e6SYuval Mintz list_add(&p_ent->list, &p_spq->pending); 718fe56b9e6SYuval Mintz p_spq->high_count++; 719fe56b9e6SYuval Mintz break; 720fe56b9e6SYuval Mintz default: 721fe56b9e6SYuval Mintz return -EINVAL; 722fe56b9e6SYuval Mintz } 723fe56b9e6SYuval Mintz 724fe56b9e6SYuval Mintz return 0; 725fe56b9e6SYuval Mintz } 726fe56b9e6SYuval Mintz 727fe56b9e6SYuval Mintz /*************************************************************************** 728fe56b9e6SYuval Mintz * Accessor 729fe56b9e6SYuval Mintz ***************************************************************************/ 730fe56b9e6SYuval Mintz u32 qed_spq_get_cid(struct qed_hwfn *p_hwfn) 731fe56b9e6SYuval Mintz { 732fe56b9e6SYuval Mintz if (!p_hwfn->p_spq) 733fe56b9e6SYuval Mintz return 0xffffffff; /* illegal */ 734fe56b9e6SYuval Mintz return p_hwfn->p_spq->cid; 735fe56b9e6SYuval Mintz } 736fe56b9e6SYuval Mintz 737fe56b9e6SYuval Mintz /*************************************************************************** 738fe56b9e6SYuval Mintz * Posting new Ramrods 739fe56b9e6SYuval Mintz ***************************************************************************/ 740fe56b9e6SYuval Mintz static int qed_spq_post_list(struct qed_hwfn *p_hwfn, 7411a635e48SYuval Mintz struct list_head *head, u32 keep_reserve) 742fe56b9e6SYuval Mintz { 743fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 744fe56b9e6SYuval Mintz int rc; 745fe56b9e6SYuval Mintz 746fe56b9e6SYuval Mintz while (qed_chain_get_elem_left(&p_spq->chain) > keep_reserve && 747fe56b9e6SYuval Mintz !list_empty(head)) { 748fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = 749fe56b9e6SYuval Mintz list_first_entry(head, struct qed_spq_entry, list); 750631e871eSzhong jiang list_move_tail(&p_ent->list, &p_spq->completion_pending); 751fe56b9e6SYuval Mintz p_spq->comp_sent_count++; 752fe56b9e6SYuval Mintz 753fe56b9e6SYuval Mintz rc = qed_spq_hw_post(p_hwfn, p_spq, p_ent); 754fe56b9e6SYuval Mintz if (rc) { 755fe56b9e6SYuval Mintz list_del(&p_ent->list); 756fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 757fe56b9e6SYuval Mintz return rc; 758fe56b9e6SYuval Mintz } 759fe56b9e6SYuval Mintz } 760fe56b9e6SYuval Mintz 761fe56b9e6SYuval Mintz return 0; 762fe56b9e6SYuval Mintz } 763fe56b9e6SYuval Mintz 764660492bcSManish Chopra int qed_spq_pend_post(struct qed_hwfn *p_hwfn) 765fe56b9e6SYuval Mintz { 766fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 767fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 768fe56b9e6SYuval Mintz 769fe56b9e6SYuval Mintz while (!list_empty(&p_spq->free_pool)) { 770fe56b9e6SYuval Mintz if (list_empty(&p_spq->unlimited_pending)) 771fe56b9e6SYuval Mintz break; 772fe56b9e6SYuval Mintz 773fe56b9e6SYuval Mintz p_ent = list_first_entry(&p_spq->unlimited_pending, 7741a635e48SYuval Mintz struct qed_spq_entry, list); 775fe56b9e6SYuval Mintz if (!p_ent) 776fe56b9e6SYuval Mintz return -EINVAL; 777fe56b9e6SYuval Mintz 778fe56b9e6SYuval Mintz list_del(&p_ent->list); 779fe56b9e6SYuval Mintz 780fe56b9e6SYuval Mintz qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); 781fe56b9e6SYuval Mintz } 782fe56b9e6SYuval Mintz 783fe56b9e6SYuval Mintz return qed_spq_post_list(p_hwfn, &p_spq->pending, 784fe56b9e6SYuval Mintz SPQ_HIGH_PRI_RESERVE_DEFAULT); 785fe56b9e6SYuval Mintz } 786fe56b9e6SYuval Mintz 78764515dc8STomer Tayar static void qed_spq_recov_set_ret_code(struct qed_spq_entry *p_ent, 78864515dc8STomer Tayar u8 *fw_return_code) 78964515dc8STomer Tayar { 79064515dc8STomer Tayar if (!fw_return_code) 79164515dc8STomer Tayar return; 79264515dc8STomer Tayar 79364515dc8STomer Tayar if (p_ent->elem.hdr.protocol_id == PROTOCOLID_ROCE || 79464515dc8STomer Tayar p_ent->elem.hdr.protocol_id == PROTOCOLID_IWARP) 79564515dc8STomer Tayar *fw_return_code = RDMA_RETURN_OK; 79664515dc8STomer Tayar } 79764515dc8STomer Tayar 7982632f22eSDenis Bolotin /* Avoid overriding of SPQ entries when getting out-of-order completions, by 7992632f22eSDenis Bolotin * marking the completions in a bitmap and increasing the chain consumer only 8002632f22eSDenis Bolotin * for the first successive completed entries. 8012632f22eSDenis Bolotin */ 8022632f22eSDenis Bolotin static void qed_spq_comp_bmap_update(struct qed_hwfn *p_hwfn, __le16 echo) 8032632f22eSDenis Bolotin { 8042632f22eSDenis Bolotin u16 pos = le16_to_cpu(echo) % SPQ_RING_SIZE; 8052632f22eSDenis Bolotin struct qed_spq *p_spq = p_hwfn->p_spq; 8062632f22eSDenis Bolotin 8072632f22eSDenis Bolotin __set_bit(pos, p_spq->p_comp_bitmap); 8082632f22eSDenis Bolotin while (test_bit(p_spq->comp_bitmap_idx, 8092632f22eSDenis Bolotin p_spq->p_comp_bitmap)) { 8102632f22eSDenis Bolotin __clear_bit(p_spq->comp_bitmap_idx, 8112632f22eSDenis Bolotin p_spq->p_comp_bitmap); 8122632f22eSDenis Bolotin p_spq->comp_bitmap_idx++; 8132632f22eSDenis Bolotin qed_chain_return_produced(&p_spq->chain); 8142632f22eSDenis Bolotin } 8152632f22eSDenis Bolotin } 8162632f22eSDenis Bolotin 817fe56b9e6SYuval Mintz int qed_spq_post(struct qed_hwfn *p_hwfn, 8181a635e48SYuval Mintz struct qed_spq_entry *p_ent, u8 *fw_return_code) 819fe56b9e6SYuval Mintz { 820fe56b9e6SYuval Mintz int rc = 0; 821fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn ? p_hwfn->p_spq : NULL; 822fe56b9e6SYuval Mintz bool b_ret_ent = true; 82370eeff66SRoland Dreier bool eblock; 824fe56b9e6SYuval Mintz 825fe56b9e6SYuval Mintz if (!p_hwfn) 826fe56b9e6SYuval Mintz return -EINVAL; 827fe56b9e6SYuval Mintz 828fe56b9e6SYuval Mintz if (!p_ent) { 829fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Got a NULL pointer\n"); 830fe56b9e6SYuval Mintz return -EINVAL; 831fe56b9e6SYuval Mintz } 832fe56b9e6SYuval Mintz 83364515dc8STomer Tayar if (p_hwfn->cdev->recov_in_prog) { 83464515dc8STomer Tayar DP_VERBOSE(p_hwfn, 83564515dc8STomer Tayar QED_MSG_SPQ, 83664515dc8STomer Tayar "Recovery is in progress. Skip spq post [cmd %02x protocol %02x]\n", 83764515dc8STomer Tayar p_ent->elem.hdr.cmd_id, p_ent->elem.hdr.protocol_id); 83864515dc8STomer Tayar 83964515dc8STomer Tayar /* Let the flow complete w/o any error handling */ 84064515dc8STomer Tayar qed_spq_recov_set_ret_code(p_ent, fw_return_code); 84164515dc8STomer Tayar return 0; 84264515dc8STomer Tayar } 84364515dc8STomer Tayar 844fe56b9e6SYuval Mintz /* Complete the entry */ 845fe56b9e6SYuval Mintz rc = qed_spq_fill_entry(p_hwfn, p_ent); 846fe56b9e6SYuval Mintz 847fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 848fe56b9e6SYuval Mintz 849fe56b9e6SYuval Mintz /* Check return value after LOCK is taken for cleaner error flow */ 850fe56b9e6SYuval Mintz if (rc) 851fe56b9e6SYuval Mintz goto spq_post_fail; 852fe56b9e6SYuval Mintz 85370eeff66SRoland Dreier /* Check if entry is in block mode before qed_spq_add_entry, 85470eeff66SRoland Dreier * which might kfree p_ent. 85570eeff66SRoland Dreier */ 85670eeff66SRoland Dreier eblock = (p_ent->comp_mode == QED_SPQ_MODE_EBLOCK); 85770eeff66SRoland Dreier 858fe56b9e6SYuval Mintz /* Add the request to the pending queue */ 859fe56b9e6SYuval Mintz rc = qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); 860fe56b9e6SYuval Mintz if (rc) 861fe56b9e6SYuval Mintz goto spq_post_fail; 862fe56b9e6SYuval Mintz 863fe56b9e6SYuval Mintz rc = qed_spq_pend_post(p_hwfn); 864fe56b9e6SYuval Mintz if (rc) { 865fe56b9e6SYuval Mintz /* Since it's possible that pending failed for a different 866fe56b9e6SYuval Mintz * entry [although unlikely], the failed entry was already 867fe56b9e6SYuval Mintz * dealt with; No need to return it here. 868fe56b9e6SYuval Mintz */ 869fe56b9e6SYuval Mintz b_ret_ent = false; 870fe56b9e6SYuval Mintz goto spq_post_fail; 871fe56b9e6SYuval Mintz } 872fe56b9e6SYuval Mintz 873fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 874fe56b9e6SYuval Mintz 87570eeff66SRoland Dreier if (eblock) { 876fe56b9e6SYuval Mintz /* For entries in QED BLOCK mode, the completion code cannot 877fe56b9e6SYuval Mintz * perform the necessary cleanup - if it did, we couldn't 878fe56b9e6SYuval Mintz * access p_ent here to see whether it's successful or not. 879fe56b9e6SYuval Mintz * Thus, after gaining the answer perform the cleanup here. 880fe56b9e6SYuval Mintz */ 881c59f5291SYuval Mintz rc = qed_spq_block(p_hwfn, p_ent, fw_return_code, 882c59f5291SYuval Mintz p_ent->queue == &p_spq->unlimited_pending); 883db511c37SYuval Mintz 884db511c37SYuval Mintz if (p_ent->queue == &p_spq->unlimited_pending) { 8852632f22eSDenis Bolotin struct qed_spq_entry *p_post_ent = p_ent->post_ent; 8862632f22eSDenis Bolotin 887db511c37SYuval Mintz kfree(p_ent); 8882632f22eSDenis Bolotin 8892632f22eSDenis Bolotin /* Return the entry which was actually posted */ 8902632f22eSDenis Bolotin p_ent = p_post_ent; 891db511c37SYuval Mintz } 892db511c37SYuval Mintz 893fe56b9e6SYuval Mintz if (rc) 894fe56b9e6SYuval Mintz goto spq_post_fail2; 895fe56b9e6SYuval Mintz 896fe56b9e6SYuval Mintz /* return to pool */ 897fe56b9e6SYuval Mintz qed_spq_return_entry(p_hwfn, p_ent); 898fe56b9e6SYuval Mintz } 899fe56b9e6SYuval Mintz return rc; 900fe56b9e6SYuval Mintz 901fe56b9e6SYuval Mintz spq_post_fail2: 902fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 903fe56b9e6SYuval Mintz list_del(&p_ent->list); 9042632f22eSDenis Bolotin qed_spq_comp_bmap_update(p_hwfn, p_ent->elem.hdr.echo); 905fe56b9e6SYuval Mintz 906fe56b9e6SYuval Mintz spq_post_fail: 907fe56b9e6SYuval Mintz /* return to the free pool */ 908fe56b9e6SYuval Mintz if (b_ret_ent) 909fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 910fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 911fe56b9e6SYuval Mintz 912fe56b9e6SYuval Mintz return rc; 913fe56b9e6SYuval Mintz } 914fe56b9e6SYuval Mintz 915fe56b9e6SYuval Mintz int qed_spq_completion(struct qed_hwfn *p_hwfn, 916fe56b9e6SYuval Mintz __le16 echo, 917fe56b9e6SYuval Mintz u8 fw_return_code, 918fe56b9e6SYuval Mintz union event_ring_data *p_data) 919fe56b9e6SYuval Mintz { 920fe56b9e6SYuval Mintz struct qed_spq *p_spq; 921fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 922fe56b9e6SYuval Mintz struct qed_spq_entry *tmp; 923fe56b9e6SYuval Mintz struct qed_spq_entry *found = NULL; 924fe56b9e6SYuval Mintz 925fe56b9e6SYuval Mintz if (!p_hwfn) 926fe56b9e6SYuval Mintz return -EINVAL; 927fe56b9e6SYuval Mintz 928fe56b9e6SYuval Mintz p_spq = p_hwfn->p_spq; 929fe56b9e6SYuval Mintz if (!p_spq) 930fe56b9e6SYuval Mintz return -EINVAL; 931fe56b9e6SYuval Mintz 932fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 9331a635e48SYuval Mintz list_for_each_entry_safe(p_ent, tmp, &p_spq->completion_pending, list) { 934fe56b9e6SYuval Mintz if (p_ent->elem.hdr.echo == echo) { 935fe56b9e6SYuval Mintz list_del(&p_ent->list); 9362632f22eSDenis Bolotin qed_spq_comp_bmap_update(p_hwfn, echo); 937fe56b9e6SYuval Mintz p_spq->comp_count++; 938fe56b9e6SYuval Mintz found = p_ent; 939fe56b9e6SYuval Mintz break; 940fe56b9e6SYuval Mintz } 94176a9a364STomer Tayar 94276a9a364STomer Tayar /* This is relatively uncommon - depends on scenarios 94376a9a364STomer Tayar * which have mutliple per-PF sent ramrods. 94476a9a364STomer Tayar */ 94576a9a364STomer Tayar DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 94676a9a364STomer Tayar "Got completion for echo %04x - doesn't match echo %04x in completion pending list\n", 94776a9a364STomer Tayar le16_to_cpu(echo), 94876a9a364STomer Tayar le16_to_cpu(p_ent->elem.hdr.echo)); 949fe56b9e6SYuval Mintz } 950fe56b9e6SYuval Mintz 951fe56b9e6SYuval Mintz /* Release lock before callback, as callback may post 952fe56b9e6SYuval Mintz * an additional ramrod. 953fe56b9e6SYuval Mintz */ 954fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 955fe56b9e6SYuval Mintz 956fe56b9e6SYuval Mintz if (!found) { 957fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, 958525ef5c0SYuval Mintz "Failed to find an entry this EQE [echo %04x] completes\n", 959525ef5c0SYuval Mintz le16_to_cpu(echo)); 960fe56b9e6SYuval Mintz return -EEXIST; 961fe56b9e6SYuval Mintz } 962fe56b9e6SYuval Mintz 963525ef5c0SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 964525ef5c0SYuval Mintz "Complete EQE [echo %04x]: func %p cookie %p)\n", 965525ef5c0SYuval Mintz le16_to_cpu(echo), 966fe56b9e6SYuval Mintz p_ent->comp_cb.function, p_ent->comp_cb.cookie); 967fe56b9e6SYuval Mintz if (found->comp_cb.function) 968fe56b9e6SYuval Mintz found->comp_cb.function(p_hwfn, found->comp_cb.cookie, p_data, 969fe56b9e6SYuval Mintz fw_return_code); 970525ef5c0SYuval Mintz else 971525ef5c0SYuval Mintz DP_VERBOSE(p_hwfn, 972525ef5c0SYuval Mintz QED_MSG_SPQ, 973525ef5c0SYuval Mintz "Got a completion without a callback function\n"); 974fe56b9e6SYuval Mintz 9752632f22eSDenis Bolotin if (found->comp_mode != QED_SPQ_MODE_EBLOCK) 976db511c37SYuval Mintz /* EBLOCK is responsible for returning its own entry into the 9772632f22eSDenis Bolotin * free list. 978db511c37SYuval Mintz */ 979fe56b9e6SYuval Mintz qed_spq_return_entry(p_hwfn, found); 980fe56b9e6SYuval Mintz 981660492bcSManish Chopra return 0; 982fe56b9e6SYuval Mintz } 983fe56b9e6SYuval Mintz 984b6db3f71SAlexander Lobakin #define QED_SPQ_CONSQ_ELEM_SIZE 0x80 985b6db3f71SAlexander Lobakin 9863587cb87STomer Tayar int qed_consq_alloc(struct qed_hwfn *p_hwfn) 987fe56b9e6SYuval Mintz { 988b6db3f71SAlexander Lobakin struct qed_chain_init_params params = { 989b6db3f71SAlexander Lobakin .mode = QED_CHAIN_MODE_PBL, 990b6db3f71SAlexander Lobakin .intended_use = QED_CHAIN_USE_TO_PRODUCE, 991b6db3f71SAlexander Lobakin .cnt_type = QED_CHAIN_CNT_TYPE_U16, 992b6db3f71SAlexander Lobakin .num_elems = QED_CHAIN_PAGE_SIZE / QED_SPQ_CONSQ_ELEM_SIZE, 993b6db3f71SAlexander Lobakin .elem_size = QED_SPQ_CONSQ_ELEM_SIZE, 994b6db3f71SAlexander Lobakin }; 995fe56b9e6SYuval Mintz struct qed_consq *p_consq; 996b6db3f71SAlexander Lobakin int ret; 997fe56b9e6SYuval Mintz 998fe56b9e6SYuval Mintz /* Allocate ConsQ struct */ 99960fffb3bSYuval Mintz p_consq = kzalloc(sizeof(*p_consq), GFP_KERNEL); 10002591c280SJoe Perches if (!p_consq) 10013587cb87STomer Tayar return -ENOMEM; 1002fe56b9e6SYuval Mintz 1003b6db3f71SAlexander Lobakin /* Allocate and initialize ConsQ chain */ 1004b6db3f71SAlexander Lobakin ret = qed_chain_alloc(p_hwfn->cdev, &p_consq->chain, ¶ms); 1005b6db3f71SAlexander Lobakin if (ret) { 1006b6db3f71SAlexander Lobakin DP_NOTICE(p_hwfn, "Failed to allocate ConsQ chain"); 1007b6db3f71SAlexander Lobakin goto consq_alloc_fail; 1008b6db3f71SAlexander Lobakin } 1009fe56b9e6SYuval Mintz 10103587cb87STomer Tayar p_hwfn->p_consq = p_consq; 1011b6db3f71SAlexander Lobakin 10123587cb87STomer Tayar return 0; 1013fe56b9e6SYuval Mintz 1014b6db3f71SAlexander Lobakin consq_alloc_fail: 1015fe56b9e6SYuval Mintz kfree(p_consq); 1016b6db3f71SAlexander Lobakin 1017b6db3f71SAlexander Lobakin return ret; 10183587cb87STomer Tayar } 10193587cb87STomer Tayar 10203587cb87STomer Tayar void qed_consq_setup(struct qed_hwfn *p_hwfn) 10213587cb87STomer Tayar { 10223587cb87STomer Tayar qed_chain_reset(&p_hwfn->p_consq->chain); 10233587cb87STomer Tayar } 10243587cb87STomer Tayar 10253587cb87STomer Tayar void qed_consq_free(struct qed_hwfn *p_hwfn) 10263587cb87STomer Tayar { 10273587cb87STomer Tayar if (!p_hwfn->p_consq) 10283587cb87STomer Tayar return; 10293587cb87STomer Tayar 10303587cb87STomer Tayar qed_chain_free(p_hwfn->cdev, &p_hwfn->p_consq->chain); 10313587cb87STomer Tayar 10323587cb87STomer Tayar kfree(p_hwfn->p_consq); 10333587cb87STomer Tayar p_hwfn->p_consq = NULL; 1034fe56b9e6SYuval Mintz } 1035