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" 23*ee824f4bSOmkar Kulkarni #include "qed_iro_hsi.h" 24fe56b9e6SYuval Mintz #include "qed_hw.h" 25fe56b9e6SYuval Mintz #include "qed_int.h" 26fc831825SYuval Mintz #include "qed_iscsi.h" 27fe56b9e6SYuval Mintz #include "qed_mcp.h" 281d6cff4fSYuval Mintz #include "qed_ooo.h" 29fe56b9e6SYuval Mintz #include "qed_reg_addr.h" 30fe56b9e6SYuval Mintz #include "qed_sp.h" 3137bff2b9SYuval Mintz #include "qed_sriov.h" 32b71b9afdSKalderon, Michal #include "qed_rdma.h" 33fe56b9e6SYuval Mintz 34fe56b9e6SYuval Mintz /*************************************************************************** 35fe56b9e6SYuval Mintz * Structures & Definitions 36fe56b9e6SYuval Mintz ***************************************************************************/ 37fe56b9e6SYuval Mintz 38fe56b9e6SYuval Mintz #define SPQ_HIGH_PRI_RESERVE_DEFAULT (1) 39c59f5291SYuval Mintz 40c59f5291SYuval Mintz #define SPQ_BLOCK_DELAY_MAX_ITER (10) 41c59f5291SYuval Mintz #define SPQ_BLOCK_DELAY_US (10) 42c59f5291SYuval Mintz #define SPQ_BLOCK_SLEEP_MAX_ITER (1000) 43c59f5291SYuval Mintz #define SPQ_BLOCK_SLEEP_MS (5) 44fe56b9e6SYuval Mintz 45fe56b9e6SYuval Mintz /*************************************************************************** 46fe56b9e6SYuval Mintz * Blocking Imp. (BLOCK/EBLOCK mode) 47fe56b9e6SYuval Mintz ***************************************************************************/ 48fe56b9e6SYuval Mintz static void qed_spq_blocking_cb(struct qed_hwfn *p_hwfn, 49fe56b9e6SYuval Mintz void *cookie, 501a635e48SYuval Mintz union event_ring_data *data, u8 fw_return_code) 51fe56b9e6SYuval Mintz { 52fe56b9e6SYuval Mintz struct qed_spq_comp_done *comp_done; 53fe56b9e6SYuval Mintz 54fe56b9e6SYuval Mintz comp_done = (struct qed_spq_comp_done *)cookie; 55fe56b9e6SYuval Mintz 56fe56b9e6SYuval Mintz comp_done->fw_return_code = fw_return_code; 57fe56b9e6SYuval Mintz 58d5df7688SManish Chopra /* Make sure completion done is visible on waiting thread */ 59d5df7688SManish Chopra smp_store_release(&comp_done->done, 0x1); 60fe56b9e6SYuval Mintz } 61fe56b9e6SYuval Mintz 62c59f5291SYuval Mintz static int __qed_spq_block(struct qed_hwfn *p_hwfn, 63c59f5291SYuval Mintz struct qed_spq_entry *p_ent, 64c59f5291SYuval Mintz u8 *p_fw_ret, bool sleep_between_iter) 65c59f5291SYuval Mintz { 66c59f5291SYuval Mintz struct qed_spq_comp_done *comp_done; 67c59f5291SYuval Mintz u32 iter_cnt; 68c59f5291SYuval Mintz 69c59f5291SYuval Mintz comp_done = (struct qed_spq_comp_done *)p_ent->comp_cb.cookie; 70c59f5291SYuval Mintz iter_cnt = sleep_between_iter ? SPQ_BLOCK_SLEEP_MAX_ITER 71c59f5291SYuval Mintz : SPQ_BLOCK_DELAY_MAX_ITER; 72c59f5291SYuval Mintz 73c59f5291SYuval Mintz while (iter_cnt--) { 74c59f5291SYuval Mintz /* Validate we receive completion update */ 75cb7e125eSPaul E. McKenney if (smp_load_acquire(&comp_done->done) == 1) { /* ^^^ */ 76c59f5291SYuval Mintz if (p_fw_ret) 77c59f5291SYuval Mintz *p_fw_ret = comp_done->fw_return_code; 78c59f5291SYuval Mintz return 0; 79c59f5291SYuval Mintz } 80c59f5291SYuval Mintz 81c59f5291SYuval Mintz if (sleep_between_iter) 82c59f5291SYuval Mintz msleep(SPQ_BLOCK_SLEEP_MS); 83c59f5291SYuval Mintz else 84c59f5291SYuval Mintz udelay(SPQ_BLOCK_DELAY_US); 85c59f5291SYuval Mintz } 86c59f5291SYuval Mintz 87c59f5291SYuval Mintz return -EBUSY; 88c59f5291SYuval Mintz } 89c59f5291SYuval Mintz 90fe56b9e6SYuval Mintz static int qed_spq_block(struct qed_hwfn *p_hwfn, 91fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent, 92c59f5291SYuval Mintz u8 *p_fw_ret, bool skip_quick_poll) 93fe56b9e6SYuval Mintz { 94fe56b9e6SYuval Mintz struct qed_spq_comp_done *comp_done; 9515582962SRahul Verma struct qed_ptt *p_ptt; 96fe56b9e6SYuval Mintz int rc; 97fe56b9e6SYuval Mintz 98c59f5291SYuval Mintz /* A relatively short polling period w/o sleeping, to allow the FW to 99c59f5291SYuval Mintz * complete the ramrod and thus possibly to avoid the following sleeps. 100c59f5291SYuval Mintz */ 101c59f5291SYuval Mintz if (!skip_quick_poll) { 102c59f5291SYuval Mintz rc = __qed_spq_block(p_hwfn, p_ent, p_fw_ret, false); 103c59f5291SYuval Mintz if (!rc) 104fe56b9e6SYuval Mintz return 0; 105fe56b9e6SYuval Mintz } 106c59f5291SYuval Mintz 107c59f5291SYuval Mintz /* Move to polling with a sleeping period between iterations */ 108c59f5291SYuval Mintz rc = __qed_spq_block(p_hwfn, p_ent, p_fw_ret, true); 109c59f5291SYuval Mintz if (!rc) 110c59f5291SYuval Mintz return 0; 111fe56b9e6SYuval Mintz 11215582962SRahul Verma p_ptt = qed_ptt_acquire(p_hwfn); 11315582962SRahul Verma if (!p_ptt) { 11415582962SRahul Verma DP_NOTICE(p_hwfn, "ptt, failed to acquire\n"); 11515582962SRahul Verma return -EAGAIN; 11615582962SRahul Verma } 11715582962SRahul Verma 118fe56b9e6SYuval Mintz DP_INFO(p_hwfn, "Ramrod is stuck, requesting MCP drain\n"); 11915582962SRahul Verma rc = qed_mcp_drain(p_hwfn, p_ptt); 120fa5c448dSSagiv Ozeri qed_ptt_release(p_hwfn, p_ptt); 121c59f5291SYuval Mintz if (rc) { 122fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "MCP drain failed\n"); 123c59f5291SYuval Mintz goto err; 124c59f5291SYuval Mintz } 125fe56b9e6SYuval Mintz 126fe56b9e6SYuval Mintz /* Retry after drain */ 127c59f5291SYuval Mintz rc = __qed_spq_block(p_hwfn, p_ent, p_fw_ret, true); 128c59f5291SYuval Mintz if (!rc) 129fe56b9e6SYuval Mintz return 0; 13015582962SRahul Verma 131fa5c448dSSagiv Ozeri comp_done = (struct qed_spq_comp_done *)p_ent->comp_cb.cookie; 132fa5c448dSSagiv Ozeri if (comp_done->done == 1) { 133fa5c448dSSagiv Ozeri if (p_fw_ret) 134fa5c448dSSagiv Ozeri *p_fw_ret = comp_done->fw_return_code; 135fa5c448dSSagiv Ozeri return 0; 136fa5c448dSSagiv Ozeri } 137c59f5291SYuval Mintz err: 1382ec276d5SIgor Russkikh p_ptt = qed_ptt_acquire(p_hwfn); 1392ec276d5SIgor Russkikh if (!p_ptt) 1402ec276d5SIgor Russkikh return -EBUSY; 1412ec276d5SIgor Russkikh qed_hw_err_notify(p_hwfn, p_ptt, QED_HW_ERR_RAMROD_FAIL, 142c59f5291SYuval Mintz "Ramrod is stuck [CID %08x cmd %02x protocol %02x echo %04x]\n", 143c59f5291SYuval Mintz le32_to_cpu(p_ent->elem.hdr.cid), 144c59f5291SYuval Mintz p_ent->elem.hdr.cmd_id, 145c59f5291SYuval Mintz p_ent->elem.hdr.protocol_id, 146c59f5291SYuval Mintz le16_to_cpu(p_ent->elem.hdr.echo)); 1472ec276d5SIgor Russkikh qed_ptt_release(p_hwfn, p_ptt); 148fe56b9e6SYuval Mintz 149fe56b9e6SYuval Mintz return -EBUSY; 150fe56b9e6SYuval Mintz } 151fe56b9e6SYuval Mintz 152fe56b9e6SYuval Mintz /*************************************************************************** 153fe56b9e6SYuval Mintz * SPQ entries inner API 154fe56b9e6SYuval Mintz ***************************************************************************/ 1551a635e48SYuval Mintz static int qed_spq_fill_entry(struct qed_hwfn *p_hwfn, 156fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent) 157fe56b9e6SYuval Mintz { 158fe56b9e6SYuval Mintz p_ent->flags = 0; 159fe56b9e6SYuval Mintz 160fe56b9e6SYuval Mintz switch (p_ent->comp_mode) { 161fe56b9e6SYuval Mintz case QED_SPQ_MODE_EBLOCK: 162fe56b9e6SYuval Mintz case QED_SPQ_MODE_BLOCK: 163fe56b9e6SYuval Mintz p_ent->comp_cb.function = qed_spq_blocking_cb; 164fe56b9e6SYuval Mintz break; 165fe56b9e6SYuval Mintz case QED_SPQ_MODE_CB: 166fe56b9e6SYuval Mintz break; 167fe56b9e6SYuval Mintz default: 168fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Unknown SPQE completion mode %d\n", 169fe56b9e6SYuval Mintz p_ent->comp_mode); 170fe56b9e6SYuval Mintz return -EINVAL; 171fe56b9e6SYuval Mintz } 172fe56b9e6SYuval Mintz 173fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 174fe56b9e6SYuval Mintz "Ramrod header: [CID 0x%08x CMD 0x%02x protocol 0x%02x] Data pointer: [%08x:%08x] Completion Mode: %s\n", 175fe56b9e6SYuval Mintz p_ent->elem.hdr.cid, 176fe56b9e6SYuval Mintz p_ent->elem.hdr.cmd_id, 177fe56b9e6SYuval Mintz p_ent->elem.hdr.protocol_id, 178fe56b9e6SYuval Mintz p_ent->elem.data_ptr.hi, 179fe56b9e6SYuval Mintz p_ent->elem.data_ptr.lo, 180fe56b9e6SYuval Mintz D_TRINE(p_ent->comp_mode, QED_SPQ_MODE_EBLOCK, 181fe56b9e6SYuval Mintz QED_SPQ_MODE_BLOCK, "MODE_EBLOCK", "MODE_BLOCK", 182fe56b9e6SYuval Mintz "MODE_CB")); 183fe56b9e6SYuval Mintz 184fe56b9e6SYuval Mintz return 0; 185fe56b9e6SYuval Mintz } 186fe56b9e6SYuval Mintz 187fe56b9e6SYuval Mintz /*************************************************************************** 188fe56b9e6SYuval Mintz * HSI access 189fe56b9e6SYuval Mintz ***************************************************************************/ 190fe56b9e6SYuval Mintz static void qed_spq_hw_initialize(struct qed_hwfn *p_hwfn, 191fe56b9e6SYuval Mintz struct qed_spq *p_spq) 192fe56b9e6SYuval Mintz { 193fb09a1edSShai Malin struct core_conn_context *p_cxt; 194b5a9ee7cSAriel Elior struct qed_cxt_info cxt_info; 195b5a9ee7cSAriel Elior u16 physical_q; 196fe56b9e6SYuval Mintz int rc; 197fe56b9e6SYuval Mintz 198fe56b9e6SYuval Mintz cxt_info.iid = p_spq->cid; 199fe56b9e6SYuval Mintz 200fe56b9e6SYuval Mintz rc = qed_cxt_get_cid_info(p_hwfn, &cxt_info); 201fe56b9e6SYuval Mintz 202fe56b9e6SYuval Mintz if (rc < 0) { 203fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Cannot find context info for cid=%d\n", 204fe56b9e6SYuval Mintz p_spq->cid); 205fe56b9e6SYuval Mintz return; 206fe56b9e6SYuval Mintz } 207fe56b9e6SYuval Mintz 208fe56b9e6SYuval Mintz p_cxt = cxt_info.p_cxt; 209fe56b9e6SYuval Mintz 210fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags10, 211fb09a1edSShai Malin XSTORM_CORE_CONN_AG_CTX_DQ_CF_EN, 1); 212fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags1, 213fb09a1edSShai Malin XSTORM_CORE_CONN_AG_CTX_DQ_CF_ACTIVE, 1); 214fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags9, 215fb09a1edSShai Malin XSTORM_CORE_CONN_AG_CTX_CONSOLID_PROD_CF_EN, 1); 216fe56b9e6SYuval Mintz 217fe56b9e6SYuval Mintz /* QM physical queue */ 218b5a9ee7cSAriel Elior physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB); 219b5a9ee7cSAriel Elior p_cxt->xstorm_ag_context.physical_q0 = cpu_to_le16(physical_q); 220fe56b9e6SYuval Mintz 221fe56b9e6SYuval Mintz p_cxt->xstorm_st_context.spq_base_lo = 222fe56b9e6SYuval Mintz DMA_LO_LE(p_spq->chain.p_phys_addr); 223fe56b9e6SYuval Mintz p_cxt->xstorm_st_context.spq_base_hi = 224fe56b9e6SYuval Mintz DMA_HI_LE(p_spq->chain.p_phys_addr); 225fe56b9e6SYuval Mintz 22694494598SYuval Mintz DMA_REGPAIR_LE(p_cxt->xstorm_st_context.consolid_base_addr, 22794494598SYuval Mintz p_hwfn->p_consq->chain.p_phys_addr); 228fe56b9e6SYuval Mintz } 229fe56b9e6SYuval Mintz 230fe56b9e6SYuval Mintz static int qed_spq_hw_post(struct qed_hwfn *p_hwfn, 2311a635e48SYuval Mintz struct qed_spq *p_spq, struct qed_spq_entry *p_ent) 232fe56b9e6SYuval Mintz { 233fe56b9e6SYuval Mintz struct qed_chain *p_chain = &p_hwfn->p_spq->chain; 2349ecd8c3fSAriel Elior struct core_db_data *p_db_data = &p_spq->db_data; 23576a9a364STomer Tayar u16 echo = qed_chain_get_prod_idx(p_chain); 236fe56b9e6SYuval Mintz struct slow_path_element *elem; 237fe56b9e6SYuval Mintz 23876a9a364STomer Tayar p_ent->elem.hdr.echo = cpu_to_le16(echo); 239fe56b9e6SYuval Mintz elem = qed_chain_produce(p_chain); 240fe56b9e6SYuval Mintz if (!elem) { 241fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Failed to produce from SPQ chain\n"); 242fe56b9e6SYuval Mintz return -EINVAL; 243fe56b9e6SYuval Mintz } 244fe56b9e6SYuval Mintz 245fe56b9e6SYuval Mintz *elem = p_ent->elem; /* struct assignment */ 246fe56b9e6SYuval Mintz 247fe56b9e6SYuval Mintz /* send a doorbell on the slow hwfn session */ 2489ecd8c3fSAriel Elior p_db_data->spq_prod = cpu_to_le16(qed_chain_get_prod_idx(p_chain)); 249fe56b9e6SYuval Mintz 25034c7bb47SSudarsana Reddy Kalluru /* make sure the SPQE is updated before the doorbell */ 25134c7bb47SSudarsana Reddy Kalluru wmb(); 252fe56b9e6SYuval Mintz 2539ecd8c3fSAriel Elior DOORBELL(p_hwfn, p_spq->db_addr_offset, *(u32 *)p_db_data); 254fe56b9e6SYuval Mintz 255fe56b9e6SYuval Mintz /* make sure doorbell is rang */ 25634c7bb47SSudarsana Reddy Kalluru wmb(); 257fe56b9e6SYuval Mintz 258fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 259fe56b9e6SYuval Mintz "Doorbelled [0x%08x, CID 0x%08x] with Flags: %02x agg_params: %02x, prod: %04x\n", 2609ecd8c3fSAriel Elior p_spq->db_addr_offset, 2619ecd8c3fSAriel Elior p_spq->cid, 2629ecd8c3fSAriel Elior p_db_data->params, 2639ecd8c3fSAriel Elior p_db_data->agg_flags, qed_chain_get_prod_idx(p_chain)); 264fe56b9e6SYuval Mintz 265fe56b9e6SYuval Mintz return 0; 266fe56b9e6SYuval Mintz } 267fe56b9e6SYuval Mintz 268fe56b9e6SYuval Mintz /*************************************************************************** 269fe56b9e6SYuval Mintz * Asynchronous events 270fe56b9e6SYuval Mintz ***************************************************************************/ 271fe56b9e6SYuval Mintz static int 272fe56b9e6SYuval Mintz qed_async_event_completion(struct qed_hwfn *p_hwfn, 273fe56b9e6SYuval Mintz struct event_ring_entry *p_eqe) 274fe56b9e6SYuval Mintz { 2756c9e80eaSMichal Kalderon qed_spq_async_comp_cb cb; 2766c9e80eaSMichal Kalderon 2776c9e80eaSMichal Kalderon if (!p_hwfn->p_spq || (p_eqe->protocol_id >= MAX_PROTOCOL_TYPE)) 278fc831825SYuval Mintz return -EINVAL; 279fc831825SYuval Mintz 2806c9e80eaSMichal Kalderon cb = p_hwfn->p_spq->async_comp_cb[p_eqe->protocol_id]; 2816c9e80eaSMichal Kalderon if (cb) { 2826c9e80eaSMichal Kalderon return cb(p_hwfn, p_eqe->opcode, p_eqe->echo, 2836c9e80eaSMichal Kalderon &p_eqe->data, p_eqe->fw_return_code); 284fc831825SYuval Mintz } else { 285fc831825SYuval Mintz DP_NOTICE(p_hwfn, 286fe56b9e6SYuval Mintz "Unknown Async completion for protocol: %d\n", 287fe56b9e6SYuval Mintz p_eqe->protocol_id); 288fe56b9e6SYuval Mintz return -EINVAL; 289fe56b9e6SYuval Mintz } 29037bff2b9SYuval Mintz } 291fe56b9e6SYuval Mintz 2926c9e80eaSMichal Kalderon int 2936c9e80eaSMichal Kalderon qed_spq_register_async_cb(struct qed_hwfn *p_hwfn, 2946c9e80eaSMichal Kalderon enum protocol_type protocol_id, 2956c9e80eaSMichal Kalderon qed_spq_async_comp_cb cb) 2966c9e80eaSMichal Kalderon { 2976c9e80eaSMichal Kalderon if (!p_hwfn->p_spq || (protocol_id >= MAX_PROTOCOL_TYPE)) 2986c9e80eaSMichal Kalderon return -EINVAL; 2996c9e80eaSMichal Kalderon 3006c9e80eaSMichal Kalderon p_hwfn->p_spq->async_comp_cb[protocol_id] = cb; 3016c9e80eaSMichal Kalderon return 0; 3026c9e80eaSMichal Kalderon } 3036c9e80eaSMichal Kalderon 3046c9e80eaSMichal Kalderon void 3056c9e80eaSMichal Kalderon qed_spq_unregister_async_cb(struct qed_hwfn *p_hwfn, 3066c9e80eaSMichal Kalderon enum protocol_type protocol_id) 3076c9e80eaSMichal Kalderon { 3086c9e80eaSMichal Kalderon if (!p_hwfn->p_spq || (protocol_id >= MAX_PROTOCOL_TYPE)) 3096c9e80eaSMichal Kalderon return; 3106c9e80eaSMichal Kalderon 3116c9e80eaSMichal Kalderon p_hwfn->p_spq->async_comp_cb[protocol_id] = NULL; 3126c9e80eaSMichal Kalderon } 3136c9e80eaSMichal Kalderon 314fe56b9e6SYuval Mintz /*************************************************************************** 315fe56b9e6SYuval Mintz * EQ API 316fe56b9e6SYuval Mintz ***************************************************************************/ 3171a635e48SYuval Mintz void qed_eq_prod_update(struct qed_hwfn *p_hwfn, u16 prod) 318fe56b9e6SYuval Mintz { 319fe56b9e6SYuval Mintz u32 addr = GTT_BAR0_MAP_REG_USDM_RAM + 320fe56b9e6SYuval Mintz USTORM_EQE_CONS_OFFSET(p_hwfn->rel_pf_id); 321fe56b9e6SYuval Mintz 322fe56b9e6SYuval Mintz REG_WR16(p_hwfn, addr, prod); 323fe56b9e6SYuval Mintz } 324fe56b9e6SYuval Mintz 3251a635e48SYuval Mintz int qed_eq_completion(struct qed_hwfn *p_hwfn, void *cookie) 326fe56b9e6SYuval Mintz { 327fe56b9e6SYuval Mintz struct qed_eq *p_eq = cookie; 328fe56b9e6SYuval Mintz struct qed_chain *p_chain = &p_eq->chain; 329fe56b9e6SYuval Mintz int rc = 0; 330fe56b9e6SYuval Mintz 331fe56b9e6SYuval Mintz /* take a snapshot of the FW consumer */ 332fe56b9e6SYuval Mintz u16 fw_cons_idx = le16_to_cpu(*p_eq->p_fw_cons); 333fe56b9e6SYuval Mintz 334fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, "fw_cons_idx %x\n", fw_cons_idx); 335fe56b9e6SYuval Mintz 336fe56b9e6SYuval Mintz /* Need to guarantee the fw_cons index we use points to a usuable 337fe56b9e6SYuval Mintz * element (to comply with our chain), so our macros would comply 338fe56b9e6SYuval Mintz */ 339fe56b9e6SYuval Mintz if ((fw_cons_idx & qed_chain_get_usable_per_page(p_chain)) == 340fe56b9e6SYuval Mintz qed_chain_get_usable_per_page(p_chain)) 341fe56b9e6SYuval Mintz fw_cons_idx += qed_chain_get_unusable_per_page(p_chain); 342fe56b9e6SYuval Mintz 343fe56b9e6SYuval Mintz /* Complete current segment of eq entries */ 344fe56b9e6SYuval Mintz while (fw_cons_idx != qed_chain_get_cons_idx(p_chain)) { 345fe56b9e6SYuval Mintz struct event_ring_entry *p_eqe = qed_chain_consume(p_chain); 346fe56b9e6SYuval Mintz 347fe56b9e6SYuval Mintz if (!p_eqe) { 348fe56b9e6SYuval Mintz rc = -EINVAL; 349fe56b9e6SYuval Mintz break; 350fe56b9e6SYuval Mintz } 351fe56b9e6SYuval Mintz 352fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 353fe56b9e6SYuval Mintz "op %x prot %x res0 %x echo %x fwret %x flags %x\n", 354fe56b9e6SYuval Mintz p_eqe->opcode, 355fe56b9e6SYuval Mintz p_eqe->protocol_id, 356fe56b9e6SYuval Mintz p_eqe->reserved0, 357fe56b9e6SYuval Mintz le16_to_cpu(p_eqe->echo), 358fe56b9e6SYuval Mintz p_eqe->fw_return_code, 359fe56b9e6SYuval Mintz p_eqe->flags); 360fe56b9e6SYuval Mintz 361fe56b9e6SYuval Mintz if (GET_FIELD(p_eqe->flags, EVENT_RING_ENTRY_ASYNC)) { 362fe56b9e6SYuval Mintz if (qed_async_event_completion(p_hwfn, p_eqe)) 363fe56b9e6SYuval Mintz rc = -EINVAL; 364fe56b9e6SYuval Mintz } else if (qed_spq_completion(p_hwfn, 365fe56b9e6SYuval Mintz p_eqe->echo, 366fe56b9e6SYuval Mintz p_eqe->fw_return_code, 367fe56b9e6SYuval Mintz &p_eqe->data)) { 368fe56b9e6SYuval Mintz rc = -EINVAL; 369fe56b9e6SYuval Mintz } 370fe56b9e6SYuval Mintz 371fe56b9e6SYuval Mintz qed_chain_recycle_consumed(p_chain); 372fe56b9e6SYuval Mintz } 373fe56b9e6SYuval Mintz 374fe56b9e6SYuval Mintz qed_eq_prod_update(p_hwfn, qed_chain_get_prod_idx(p_chain)); 375fe56b9e6SYuval Mintz 376660492bcSManish Chopra /* Attempt to post pending requests */ 377660492bcSManish Chopra spin_lock_bh(&p_hwfn->p_spq->lock); 378660492bcSManish Chopra rc = qed_spq_pend_post(p_hwfn); 379660492bcSManish Chopra spin_unlock_bh(&p_hwfn->p_spq->lock); 380660492bcSManish Chopra 381fe56b9e6SYuval Mintz return rc; 382fe56b9e6SYuval Mintz } 383fe56b9e6SYuval Mintz 3843587cb87STomer Tayar int qed_eq_alloc(struct qed_hwfn *p_hwfn, u16 num_elem) 385fe56b9e6SYuval Mintz { 386b6db3f71SAlexander Lobakin struct qed_chain_init_params params = { 387b6db3f71SAlexander Lobakin .mode = QED_CHAIN_MODE_PBL, 388b6db3f71SAlexander Lobakin .intended_use = QED_CHAIN_USE_TO_PRODUCE, 389b6db3f71SAlexander Lobakin .cnt_type = QED_CHAIN_CNT_TYPE_U16, 390b6db3f71SAlexander Lobakin .num_elems = num_elem, 391b6db3f71SAlexander Lobakin .elem_size = sizeof(union event_ring_element), 392b6db3f71SAlexander Lobakin }; 393fe56b9e6SYuval Mintz struct qed_eq *p_eq; 394b6db3f71SAlexander Lobakin int ret; 395fe56b9e6SYuval Mintz 396fe56b9e6SYuval Mintz /* Allocate EQ struct */ 39760fffb3bSYuval Mintz p_eq = kzalloc(sizeof(*p_eq), GFP_KERNEL); 3982591c280SJoe Perches if (!p_eq) 3993587cb87STomer Tayar return -ENOMEM; 400fe56b9e6SYuval Mintz 401b6db3f71SAlexander Lobakin ret = qed_chain_alloc(p_hwfn->cdev, &p_eq->chain, ¶ms); 402b6db3f71SAlexander Lobakin if (ret) { 403b6db3f71SAlexander Lobakin DP_NOTICE(p_hwfn, "Failed to allocate EQ chain\n"); 404fe56b9e6SYuval Mintz goto eq_allocate_fail; 405b6db3f71SAlexander Lobakin } 406fe56b9e6SYuval Mintz 407fe56b9e6SYuval Mintz /* register EQ completion on the SP SB */ 4081a635e48SYuval Mintz qed_int_register_cb(p_hwfn, qed_eq_completion, 4091a635e48SYuval Mintz p_eq, &p_eq->eq_sb_index, &p_eq->p_fw_cons); 410fe56b9e6SYuval Mintz 4113587cb87STomer Tayar p_hwfn->p_eq = p_eq; 4123587cb87STomer Tayar return 0; 413fe56b9e6SYuval Mintz 414fe56b9e6SYuval Mintz eq_allocate_fail: 415fe56b9e6SYuval Mintz kfree(p_eq); 416b6db3f71SAlexander Lobakin 417b6db3f71SAlexander Lobakin return ret; 4183587cb87STomer Tayar } 4193587cb87STomer Tayar 4203587cb87STomer Tayar void qed_eq_setup(struct qed_hwfn *p_hwfn) 4213587cb87STomer Tayar { 4223587cb87STomer Tayar qed_chain_reset(&p_hwfn->p_eq->chain); 4233587cb87STomer Tayar } 4243587cb87STomer Tayar 4253587cb87STomer Tayar void qed_eq_free(struct qed_hwfn *p_hwfn) 4263587cb87STomer Tayar { 4273587cb87STomer Tayar if (!p_hwfn->p_eq) 4283587cb87STomer Tayar return; 4293587cb87STomer Tayar 4303587cb87STomer Tayar qed_chain_free(p_hwfn->cdev, &p_hwfn->p_eq->chain); 4313587cb87STomer Tayar 4323587cb87STomer Tayar kfree(p_hwfn->p_eq); 4333587cb87STomer Tayar p_hwfn->p_eq = NULL; 434fe56b9e6SYuval Mintz } 435fe56b9e6SYuval Mintz 436fe56b9e6SYuval Mintz /*************************************************************************** 437cee4d264SManish Chopra * CQE API - manipulate EQ functionality 438cee4d264SManish Chopra ***************************************************************************/ 4391a635e48SYuval Mintz static int qed_cqe_completion(struct qed_hwfn *p_hwfn, 440cee4d264SManish Chopra struct eth_slow_path_rx_cqe *cqe, 441cee4d264SManish Chopra enum protocol_type protocol) 442cee4d264SManish Chopra { 4431408cc1fSYuval Mintz if (IS_VF(p_hwfn->cdev)) 4441408cc1fSYuval Mintz return 0; 4451408cc1fSYuval Mintz 446cee4d264SManish Chopra /* @@@tmp - it's possible we'll eventually want to handle some 447cee4d264SManish Chopra * actual commands that can arrive here, but for now this is only 448cee4d264SManish Chopra * used to complete the ramrod using the echo value on the cqe 449cee4d264SManish Chopra */ 450cee4d264SManish Chopra return qed_spq_completion(p_hwfn, cqe->echo, 0, NULL); 451cee4d264SManish Chopra } 452cee4d264SManish Chopra 453cee4d264SManish Chopra int qed_eth_cqe_completion(struct qed_hwfn *p_hwfn, 454cee4d264SManish Chopra struct eth_slow_path_rx_cqe *cqe) 455cee4d264SManish Chopra { 456cee4d264SManish Chopra int rc; 457cee4d264SManish Chopra 458cee4d264SManish Chopra rc = qed_cqe_completion(p_hwfn, cqe, PROTOCOLID_ETH); 459cee4d264SManish Chopra if (rc) 460cee4d264SManish Chopra DP_NOTICE(p_hwfn, 461cee4d264SManish Chopra "Failed to handle RXQ CQE [cmd 0x%02x]\n", 462cee4d264SManish Chopra cqe->ramrod_cmd_id); 463cee4d264SManish Chopra 464cee4d264SManish Chopra return rc; 465cee4d264SManish Chopra } 466cee4d264SManish Chopra 467cee4d264SManish Chopra /*************************************************************************** 468fe56b9e6SYuval Mintz * Slow hwfn Queue (spq) 469fe56b9e6SYuval Mintz ***************************************************************************/ 470fe56b9e6SYuval Mintz void qed_spq_setup(struct qed_hwfn *p_hwfn) 471fe56b9e6SYuval Mintz { 472fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 473fe56b9e6SYuval Mintz struct qed_spq_entry *p_virt = NULL; 4749ecd8c3fSAriel Elior struct core_db_data *p_db_data; 4759ecd8c3fSAriel Elior void __iomem *db_addr; 476fe56b9e6SYuval Mintz dma_addr_t p_phys = 0; 477a91eb52aSYuval Mintz u32 i, capacity; 4789ecd8c3fSAriel Elior int rc; 479fe56b9e6SYuval Mintz 480fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->pending); 481fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->completion_pending); 482fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->free_pool); 483fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->unlimited_pending); 484fe56b9e6SYuval Mintz spin_lock_init(&p_spq->lock); 485fe56b9e6SYuval Mintz 486fe56b9e6SYuval Mintz /* SPQ empty pool */ 487fe56b9e6SYuval Mintz p_phys = p_spq->p_phys + offsetof(struct qed_spq_entry, ramrod); 488fe56b9e6SYuval Mintz p_virt = p_spq->p_virt; 489fe56b9e6SYuval Mintz 490a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 491a91eb52aSYuval Mintz for (i = 0; i < capacity; i++) { 49294494598SYuval Mintz DMA_REGPAIR_LE(p_virt->elem.data_ptr, p_phys); 493fe56b9e6SYuval Mintz 494fe56b9e6SYuval Mintz list_add_tail(&p_virt->list, &p_spq->free_pool); 495fe56b9e6SYuval Mintz 496fe56b9e6SYuval Mintz p_virt++; 497fe56b9e6SYuval Mintz p_phys += sizeof(struct qed_spq_entry); 498fe56b9e6SYuval Mintz } 499fe56b9e6SYuval Mintz 500fe56b9e6SYuval Mintz /* Statistics */ 501fe56b9e6SYuval Mintz p_spq->normal_count = 0; 502fe56b9e6SYuval Mintz p_spq->comp_count = 0; 503fe56b9e6SYuval Mintz p_spq->comp_sent_count = 0; 504fe56b9e6SYuval Mintz p_spq->unlimited_pending_count = 0; 50576a9a364STomer Tayar 50676a9a364STomer Tayar bitmap_zero(p_spq->p_comp_bitmap, SPQ_RING_SIZE); 50776a9a364STomer Tayar p_spq->comp_bitmap_idx = 0; 508fe56b9e6SYuval Mintz 509fe56b9e6SYuval Mintz /* SPQ cid, cannot fail */ 510fe56b9e6SYuval Mintz qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_spq->cid); 511fe56b9e6SYuval Mintz qed_spq_hw_initialize(p_hwfn, p_spq); 512fe56b9e6SYuval Mintz 513fe56b9e6SYuval Mintz /* reset the chain itself */ 514fe56b9e6SYuval Mintz qed_chain_reset(&p_spq->chain); 5159ecd8c3fSAriel Elior 5169ecd8c3fSAriel Elior /* Initialize the address/data of the SPQ doorbell */ 5179ecd8c3fSAriel Elior p_spq->db_addr_offset = qed_db_addr(p_spq->cid, DQ_DEMS_LEGACY); 5189ecd8c3fSAriel Elior p_db_data = &p_spq->db_data; 5199ecd8c3fSAriel Elior memset(p_db_data, 0, sizeof(*p_db_data)); 5209ecd8c3fSAriel Elior SET_FIELD(p_db_data->params, CORE_DB_DATA_DEST, DB_DEST_XCM); 5219ecd8c3fSAriel Elior SET_FIELD(p_db_data->params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_MAX); 5229ecd8c3fSAriel Elior SET_FIELD(p_db_data->params, CORE_DB_DATA_AGG_VAL_SEL, 5239ecd8c3fSAriel Elior DQ_XCM_CORE_SPQ_PROD_CMD); 5249ecd8c3fSAriel Elior p_db_data->agg_flags = DQ_XCM_CORE_DQ_CF_CMD; 5259ecd8c3fSAriel Elior 5269ecd8c3fSAriel Elior /* Register the SPQ doorbell with the doorbell recovery mechanism */ 5279ecd8c3fSAriel Elior db_addr = (void __iomem *)((u8 __iomem *)p_hwfn->doorbells + 5289ecd8c3fSAriel Elior p_spq->db_addr_offset); 5299ecd8c3fSAriel Elior rc = qed_db_recovery_add(p_hwfn->cdev, db_addr, &p_spq->db_data, 5309ecd8c3fSAriel Elior DB_REC_WIDTH_32B, DB_REC_KERNEL); 5319ecd8c3fSAriel Elior if (rc) 5329ecd8c3fSAriel Elior DP_INFO(p_hwfn, 5339ecd8c3fSAriel Elior "Failed to register the SPQ doorbell with the doorbell recovery mechanism\n"); 534fe56b9e6SYuval Mintz } 535fe56b9e6SYuval Mintz 536fe56b9e6SYuval Mintz int qed_spq_alloc(struct qed_hwfn *p_hwfn) 537fe56b9e6SYuval Mintz { 538b6db3f71SAlexander Lobakin struct qed_chain_init_params params = { 539b6db3f71SAlexander Lobakin .mode = QED_CHAIN_MODE_SINGLE, 540b6db3f71SAlexander Lobakin .intended_use = QED_CHAIN_USE_TO_PRODUCE, 541b6db3f71SAlexander Lobakin .cnt_type = QED_CHAIN_CNT_TYPE_U16, 542b6db3f71SAlexander Lobakin .elem_size = sizeof(struct slow_path_element), 543b6db3f71SAlexander Lobakin }; 544b6db3f71SAlexander Lobakin struct qed_dev *cdev = p_hwfn->cdev; 545a91eb52aSYuval Mintz struct qed_spq_entry *p_virt = NULL; 546fe56b9e6SYuval Mintz struct qed_spq *p_spq = NULL; 547fe56b9e6SYuval Mintz dma_addr_t p_phys = 0; 548a91eb52aSYuval Mintz u32 capacity; 549b6db3f71SAlexander Lobakin int ret; 550fe56b9e6SYuval Mintz 551fe56b9e6SYuval Mintz /* SPQ struct */ 5521a635e48SYuval Mintz p_spq = kzalloc(sizeof(struct qed_spq), GFP_KERNEL); 5532591c280SJoe Perches if (!p_spq) 554fe56b9e6SYuval Mintz return -ENOMEM; 555fe56b9e6SYuval Mintz 556fe56b9e6SYuval Mintz /* SPQ ring */ 557b6db3f71SAlexander Lobakin ret = qed_chain_alloc(cdev, &p_spq->chain, ¶ms); 558b6db3f71SAlexander Lobakin if (ret) { 559b6db3f71SAlexander Lobakin DP_NOTICE(p_hwfn, "Failed to allocate SPQ chain\n"); 560b6db3f71SAlexander Lobakin goto spq_chain_alloc_fail; 561b6db3f71SAlexander Lobakin } 562fe56b9e6SYuval Mintz 563fe56b9e6SYuval Mintz /* allocate and fill the SPQ elements (incl. ramrod data list) */ 564a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 565b6db3f71SAlexander Lobakin ret = -ENOMEM; 566b6db3f71SAlexander Lobakin 567b6db3f71SAlexander Lobakin p_virt = dma_alloc_coherent(&cdev->pdev->dev, 5682591c280SJoe Perches capacity * sizeof(struct qed_spq_entry), 569a91eb52aSYuval Mintz &p_phys, GFP_KERNEL); 570fe56b9e6SYuval Mintz if (!p_virt) 571b6db3f71SAlexander Lobakin goto spq_alloc_fail; 572fe56b9e6SYuval Mintz 573fe56b9e6SYuval Mintz p_spq->p_virt = p_virt; 574fe56b9e6SYuval Mintz p_spq->p_phys = p_phys; 575fe56b9e6SYuval Mintz p_hwfn->p_spq = p_spq; 576fe56b9e6SYuval Mintz 577fe56b9e6SYuval Mintz return 0; 578fe56b9e6SYuval Mintz 579b6db3f71SAlexander Lobakin spq_alloc_fail: 580b6db3f71SAlexander Lobakin qed_chain_free(cdev, &p_spq->chain); 581b6db3f71SAlexander Lobakin spq_chain_alloc_fail: 582fe56b9e6SYuval Mintz kfree(p_spq); 583b6db3f71SAlexander Lobakin 584b6db3f71SAlexander Lobakin return ret; 585fe56b9e6SYuval Mintz } 586fe56b9e6SYuval Mintz 587fe56b9e6SYuval Mintz void qed_spq_free(struct qed_hwfn *p_hwfn) 588fe56b9e6SYuval Mintz { 589fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 5909ecd8c3fSAriel Elior void __iomem *db_addr; 591a91eb52aSYuval Mintz u32 capacity; 592fe56b9e6SYuval Mintz 593fe56b9e6SYuval Mintz if (!p_spq) 594fe56b9e6SYuval Mintz return; 595fe56b9e6SYuval Mintz 5969ecd8c3fSAriel Elior /* Delete the SPQ doorbell from the doorbell recovery mechanism */ 5979ecd8c3fSAriel Elior db_addr = (void __iomem *)((u8 __iomem *)p_hwfn->doorbells + 5989ecd8c3fSAriel Elior p_spq->db_addr_offset); 5999ecd8c3fSAriel Elior qed_db_recovery_del(p_hwfn->cdev, db_addr, &p_spq->db_data); 6009ecd8c3fSAriel Elior 601a91eb52aSYuval Mintz if (p_spq->p_virt) { 602a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 603fe56b9e6SYuval Mintz dma_free_coherent(&p_hwfn->cdev->pdev->dev, 604a91eb52aSYuval Mintz capacity * 605fe56b9e6SYuval Mintz sizeof(struct qed_spq_entry), 606a91eb52aSYuval Mintz p_spq->p_virt, p_spq->p_phys); 607a91eb52aSYuval Mintz } 608fe56b9e6SYuval Mintz 609fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_spq->chain); 610fe56b9e6SYuval Mintz kfree(p_spq); 6113587cb87STomer Tayar p_hwfn->p_spq = NULL; 612fe56b9e6SYuval Mintz } 613fe56b9e6SYuval Mintz 6141a635e48SYuval Mintz int qed_spq_get_entry(struct qed_hwfn *p_hwfn, struct qed_spq_entry **pp_ent) 615fe56b9e6SYuval Mintz { 616fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 617fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 618fe56b9e6SYuval Mintz int rc = 0; 619fe56b9e6SYuval Mintz 620fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 621fe56b9e6SYuval Mintz 622fe56b9e6SYuval Mintz if (list_empty(&p_spq->free_pool)) { 623fe56b9e6SYuval Mintz p_ent = kzalloc(sizeof(*p_ent), GFP_ATOMIC); 624fe56b9e6SYuval Mintz if (!p_ent) { 6251a635e48SYuval Mintz DP_NOTICE(p_hwfn, 6261a635e48SYuval Mintz "Failed to allocate an SPQ entry for a pending ramrod\n"); 627fe56b9e6SYuval Mintz rc = -ENOMEM; 628fe56b9e6SYuval Mintz goto out_unlock; 629fe56b9e6SYuval Mintz } 630fe56b9e6SYuval Mintz p_ent->queue = &p_spq->unlimited_pending; 631fe56b9e6SYuval Mintz } else { 632fe56b9e6SYuval Mintz p_ent = list_first_entry(&p_spq->free_pool, 6331a635e48SYuval Mintz struct qed_spq_entry, list); 634fe56b9e6SYuval Mintz list_del(&p_ent->list); 635fe56b9e6SYuval Mintz p_ent->queue = &p_spq->pending; 636fe56b9e6SYuval Mintz } 637fe56b9e6SYuval Mintz 638fe56b9e6SYuval Mintz *pp_ent = p_ent; 639fe56b9e6SYuval Mintz 640fe56b9e6SYuval Mintz out_unlock: 641fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 642fe56b9e6SYuval Mintz return rc; 643fe56b9e6SYuval Mintz } 644fe56b9e6SYuval Mintz 645fe56b9e6SYuval Mintz /* Locked variant; Should be called while the SPQ lock is taken */ 646fe56b9e6SYuval Mintz static void __qed_spq_return_entry(struct qed_hwfn *p_hwfn, 647fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent) 648fe56b9e6SYuval Mintz { 649fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_hwfn->p_spq->free_pool); 650fe56b9e6SYuval Mintz } 651fe56b9e6SYuval Mintz 6521a635e48SYuval Mintz void qed_spq_return_entry(struct qed_hwfn *p_hwfn, struct qed_spq_entry *p_ent) 653fe56b9e6SYuval Mintz { 654fe56b9e6SYuval Mintz spin_lock_bh(&p_hwfn->p_spq->lock); 655fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 656fe56b9e6SYuval Mintz spin_unlock_bh(&p_hwfn->p_spq->lock); 657fe56b9e6SYuval Mintz } 658fe56b9e6SYuval Mintz 659fe56b9e6SYuval Mintz /** 66071e11a3fSAlexander Lobakin * qed_spq_add_entry() - Add a new entry to the pending list. 66171e11a3fSAlexander Lobakin * Should be used while lock is being held. 662fe56b9e6SYuval Mintz * 66371e11a3fSAlexander Lobakin * @p_hwfn: HW device data. 66471e11a3fSAlexander Lobakin * @p_ent: An entry to add. 66571e11a3fSAlexander Lobakin * @priority: Desired priority. 66671e11a3fSAlexander Lobakin * 66771e11a3fSAlexander Lobakin * Adds an entry to the pending list is there is room (an empty 668fe56b9e6SYuval Mintz * element is available in the free_pool), or else places the 669fe56b9e6SYuval Mintz * entry in the unlimited_pending pool. 670fe56b9e6SYuval Mintz * 67171e11a3fSAlexander Lobakin * Return: zero on success, -EINVAL on invalid @priority. 672fe56b9e6SYuval Mintz */ 6731a635e48SYuval Mintz static int qed_spq_add_entry(struct qed_hwfn *p_hwfn, 674fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent, 675fe56b9e6SYuval Mintz enum spq_priority priority) 676fe56b9e6SYuval Mintz { 677fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 678fe56b9e6SYuval Mintz 679fe56b9e6SYuval Mintz if (p_ent->queue == &p_spq->unlimited_pending) { 680fe56b9e6SYuval Mintz 681fe56b9e6SYuval Mintz if (list_empty(&p_spq->free_pool)) { 682fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->unlimited_pending); 683fe56b9e6SYuval Mintz p_spq->unlimited_pending_count++; 684fe56b9e6SYuval Mintz 685fe56b9e6SYuval Mintz return 0; 68676a9a364STomer Tayar } else { 68776a9a364STomer Tayar struct qed_spq_entry *p_en2; 688fe56b9e6SYuval Mintz 689fe56b9e6SYuval Mintz p_en2 = list_first_entry(&p_spq->free_pool, 6901a635e48SYuval Mintz struct qed_spq_entry, list); 691fe56b9e6SYuval Mintz list_del(&p_en2->list); 692fe56b9e6SYuval Mintz 69376a9a364STomer Tayar /* Copy the ring element physical pointer to the new 69476a9a364STomer Tayar * entry, since we are about to override the entire ring 69576a9a364STomer Tayar * entry and don't want to lose the pointer. 69676a9a364STomer Tayar */ 69776a9a364STomer Tayar p_ent->elem.data_ptr = p_en2->elem.data_ptr; 69876a9a364STomer Tayar 699fe56b9e6SYuval Mintz *p_en2 = *p_ent; 700fe56b9e6SYuval Mintz 701db511c37SYuval Mintz /* EBLOCK responsible to free the allocated p_ent */ 702db511c37SYuval Mintz if (p_ent->comp_mode != QED_SPQ_MODE_EBLOCK) 703fe56b9e6SYuval Mintz kfree(p_ent); 7042632f22eSDenis Bolotin else 7052632f22eSDenis Bolotin p_ent->post_ent = p_en2; 706fe56b9e6SYuval Mintz 707fe56b9e6SYuval Mintz p_ent = p_en2; 708fe56b9e6SYuval Mintz } 70976a9a364STomer Tayar } 710fe56b9e6SYuval Mintz 711fe56b9e6SYuval Mintz /* entry is to be placed in 'pending' queue */ 712fe56b9e6SYuval Mintz switch (priority) { 713fe56b9e6SYuval Mintz case QED_SPQ_PRIORITY_NORMAL: 714fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->pending); 715fe56b9e6SYuval Mintz p_spq->normal_count++; 716fe56b9e6SYuval Mintz break; 717fe56b9e6SYuval Mintz case QED_SPQ_PRIORITY_HIGH: 718fe56b9e6SYuval Mintz list_add(&p_ent->list, &p_spq->pending); 719fe56b9e6SYuval Mintz p_spq->high_count++; 720fe56b9e6SYuval Mintz break; 721fe56b9e6SYuval Mintz default: 722fe56b9e6SYuval Mintz return -EINVAL; 723fe56b9e6SYuval Mintz } 724fe56b9e6SYuval Mintz 725fe56b9e6SYuval Mintz return 0; 726fe56b9e6SYuval Mintz } 727fe56b9e6SYuval Mintz 728fe56b9e6SYuval Mintz /*************************************************************************** 729fe56b9e6SYuval Mintz * Accessor 730fe56b9e6SYuval Mintz ***************************************************************************/ 731fe56b9e6SYuval Mintz u32 qed_spq_get_cid(struct qed_hwfn *p_hwfn) 732fe56b9e6SYuval Mintz { 733fe56b9e6SYuval Mintz if (!p_hwfn->p_spq) 734fe56b9e6SYuval Mintz return 0xffffffff; /* illegal */ 735fe56b9e6SYuval Mintz return p_hwfn->p_spq->cid; 736fe56b9e6SYuval Mintz } 737fe56b9e6SYuval Mintz 738fe56b9e6SYuval Mintz /*************************************************************************** 739fe56b9e6SYuval Mintz * Posting new Ramrods 740fe56b9e6SYuval Mintz ***************************************************************************/ 741fe56b9e6SYuval Mintz static int qed_spq_post_list(struct qed_hwfn *p_hwfn, 7421a635e48SYuval Mintz struct list_head *head, u32 keep_reserve) 743fe56b9e6SYuval Mintz { 744fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 745fe56b9e6SYuval Mintz int rc; 746fe56b9e6SYuval Mintz 747fe56b9e6SYuval Mintz while (qed_chain_get_elem_left(&p_spq->chain) > keep_reserve && 748fe56b9e6SYuval Mintz !list_empty(head)) { 749fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = 750fe56b9e6SYuval Mintz list_first_entry(head, struct qed_spq_entry, list); 751631e871eSzhong jiang list_move_tail(&p_ent->list, &p_spq->completion_pending); 752fe56b9e6SYuval Mintz p_spq->comp_sent_count++; 753fe56b9e6SYuval Mintz 754fe56b9e6SYuval Mintz rc = qed_spq_hw_post(p_hwfn, p_spq, p_ent); 755fe56b9e6SYuval Mintz if (rc) { 756fe56b9e6SYuval Mintz list_del(&p_ent->list); 757fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 758fe56b9e6SYuval Mintz return rc; 759fe56b9e6SYuval Mintz } 760fe56b9e6SYuval Mintz } 761fe56b9e6SYuval Mintz 762fe56b9e6SYuval Mintz return 0; 763fe56b9e6SYuval Mintz } 764fe56b9e6SYuval Mintz 765660492bcSManish Chopra int qed_spq_pend_post(struct qed_hwfn *p_hwfn) 766fe56b9e6SYuval Mintz { 767fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 768fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 769fe56b9e6SYuval Mintz 770fe56b9e6SYuval Mintz while (!list_empty(&p_spq->free_pool)) { 771fe56b9e6SYuval Mintz if (list_empty(&p_spq->unlimited_pending)) 772fe56b9e6SYuval Mintz break; 773fe56b9e6SYuval Mintz 774fe56b9e6SYuval Mintz p_ent = list_first_entry(&p_spq->unlimited_pending, 7751a635e48SYuval Mintz struct qed_spq_entry, list); 776fe56b9e6SYuval Mintz if (!p_ent) 777fe56b9e6SYuval Mintz return -EINVAL; 778fe56b9e6SYuval Mintz 779fe56b9e6SYuval Mintz list_del(&p_ent->list); 780fe56b9e6SYuval Mintz 781fe56b9e6SYuval Mintz qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); 782fe56b9e6SYuval Mintz } 783fe56b9e6SYuval Mintz 784fe56b9e6SYuval Mintz return qed_spq_post_list(p_hwfn, &p_spq->pending, 785fe56b9e6SYuval Mintz SPQ_HIGH_PRI_RESERVE_DEFAULT); 786fe56b9e6SYuval Mintz } 787fe56b9e6SYuval Mintz 78864515dc8STomer Tayar static void qed_spq_recov_set_ret_code(struct qed_spq_entry *p_ent, 78964515dc8STomer Tayar u8 *fw_return_code) 79064515dc8STomer Tayar { 79164515dc8STomer Tayar if (!fw_return_code) 79264515dc8STomer Tayar return; 79364515dc8STomer Tayar 79464515dc8STomer Tayar if (p_ent->elem.hdr.protocol_id == PROTOCOLID_ROCE || 79564515dc8STomer Tayar p_ent->elem.hdr.protocol_id == PROTOCOLID_IWARP) 79664515dc8STomer Tayar *fw_return_code = RDMA_RETURN_OK; 79764515dc8STomer Tayar } 79864515dc8STomer Tayar 7992632f22eSDenis Bolotin /* Avoid overriding of SPQ entries when getting out-of-order completions, by 8002632f22eSDenis Bolotin * marking the completions in a bitmap and increasing the chain consumer only 8012632f22eSDenis Bolotin * for the first successive completed entries. 8022632f22eSDenis Bolotin */ 8032632f22eSDenis Bolotin static void qed_spq_comp_bmap_update(struct qed_hwfn *p_hwfn, __le16 echo) 8042632f22eSDenis Bolotin { 8052632f22eSDenis Bolotin u16 pos = le16_to_cpu(echo) % SPQ_RING_SIZE; 8062632f22eSDenis Bolotin struct qed_spq *p_spq = p_hwfn->p_spq; 8072632f22eSDenis Bolotin 8082632f22eSDenis Bolotin __set_bit(pos, p_spq->p_comp_bitmap); 8092632f22eSDenis Bolotin while (test_bit(p_spq->comp_bitmap_idx, 8102632f22eSDenis Bolotin p_spq->p_comp_bitmap)) { 8112632f22eSDenis Bolotin __clear_bit(p_spq->comp_bitmap_idx, 8122632f22eSDenis Bolotin p_spq->p_comp_bitmap); 8132632f22eSDenis Bolotin p_spq->comp_bitmap_idx++; 8142632f22eSDenis Bolotin qed_chain_return_produced(&p_spq->chain); 8152632f22eSDenis Bolotin } 8162632f22eSDenis Bolotin } 8172632f22eSDenis Bolotin 818fe56b9e6SYuval Mintz int qed_spq_post(struct qed_hwfn *p_hwfn, 8191a635e48SYuval Mintz struct qed_spq_entry *p_ent, u8 *fw_return_code) 820fe56b9e6SYuval Mintz { 821fe56b9e6SYuval Mintz int rc = 0; 822fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn ? p_hwfn->p_spq : NULL; 823fe56b9e6SYuval Mintz bool b_ret_ent = true; 82470eeff66SRoland Dreier bool eblock; 825fe56b9e6SYuval Mintz 826fe56b9e6SYuval Mintz if (!p_hwfn) 827fe56b9e6SYuval Mintz return -EINVAL; 828fe56b9e6SYuval Mintz 829fe56b9e6SYuval Mintz if (!p_ent) { 830fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Got a NULL pointer\n"); 831fe56b9e6SYuval Mintz return -EINVAL; 832fe56b9e6SYuval Mintz } 833fe56b9e6SYuval Mintz 83464515dc8STomer Tayar if (p_hwfn->cdev->recov_in_prog) { 83564515dc8STomer Tayar DP_VERBOSE(p_hwfn, 83664515dc8STomer Tayar QED_MSG_SPQ, 83764515dc8STomer Tayar "Recovery is in progress. Skip spq post [cmd %02x protocol %02x]\n", 83864515dc8STomer Tayar p_ent->elem.hdr.cmd_id, p_ent->elem.hdr.protocol_id); 83964515dc8STomer Tayar 84064515dc8STomer Tayar /* Let the flow complete w/o any error handling */ 84164515dc8STomer Tayar qed_spq_recov_set_ret_code(p_ent, fw_return_code); 84264515dc8STomer Tayar return 0; 84364515dc8STomer Tayar } 84464515dc8STomer Tayar 845fe56b9e6SYuval Mintz /* Complete the entry */ 846fe56b9e6SYuval Mintz rc = qed_spq_fill_entry(p_hwfn, p_ent); 847fe56b9e6SYuval Mintz 848fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 849fe56b9e6SYuval Mintz 850fe56b9e6SYuval Mintz /* Check return value after LOCK is taken for cleaner error flow */ 851fe56b9e6SYuval Mintz if (rc) 852fe56b9e6SYuval Mintz goto spq_post_fail; 853fe56b9e6SYuval Mintz 85470eeff66SRoland Dreier /* Check if entry is in block mode before qed_spq_add_entry, 85570eeff66SRoland Dreier * which might kfree p_ent. 85670eeff66SRoland Dreier */ 85770eeff66SRoland Dreier eblock = (p_ent->comp_mode == QED_SPQ_MODE_EBLOCK); 85870eeff66SRoland Dreier 859fe56b9e6SYuval Mintz /* Add the request to the pending queue */ 860fe56b9e6SYuval Mintz rc = qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); 861fe56b9e6SYuval Mintz if (rc) 862fe56b9e6SYuval Mintz goto spq_post_fail; 863fe56b9e6SYuval Mintz 864fe56b9e6SYuval Mintz rc = qed_spq_pend_post(p_hwfn); 865fe56b9e6SYuval Mintz if (rc) { 866fe56b9e6SYuval Mintz /* Since it's possible that pending failed for a different 867fe56b9e6SYuval Mintz * entry [although unlikely], the failed entry was already 868fe56b9e6SYuval Mintz * dealt with; No need to return it here. 869fe56b9e6SYuval Mintz */ 870fe56b9e6SYuval Mintz b_ret_ent = false; 871fe56b9e6SYuval Mintz goto spq_post_fail; 872fe56b9e6SYuval Mintz } 873fe56b9e6SYuval Mintz 874fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 875fe56b9e6SYuval Mintz 87670eeff66SRoland Dreier if (eblock) { 877fe56b9e6SYuval Mintz /* For entries in QED BLOCK mode, the completion code cannot 878fe56b9e6SYuval Mintz * perform the necessary cleanup - if it did, we couldn't 879fe56b9e6SYuval Mintz * access p_ent here to see whether it's successful or not. 880fe56b9e6SYuval Mintz * Thus, after gaining the answer perform the cleanup here. 881fe56b9e6SYuval Mintz */ 882c59f5291SYuval Mintz rc = qed_spq_block(p_hwfn, p_ent, fw_return_code, 883c59f5291SYuval Mintz p_ent->queue == &p_spq->unlimited_pending); 884db511c37SYuval Mintz 885db511c37SYuval Mintz if (p_ent->queue == &p_spq->unlimited_pending) { 8862632f22eSDenis Bolotin struct qed_spq_entry *p_post_ent = p_ent->post_ent; 8872632f22eSDenis Bolotin 888db511c37SYuval Mintz kfree(p_ent); 8892632f22eSDenis Bolotin 8902632f22eSDenis Bolotin /* Return the entry which was actually posted */ 8912632f22eSDenis Bolotin p_ent = p_post_ent; 892db511c37SYuval Mintz } 893db511c37SYuval Mintz 894fe56b9e6SYuval Mintz if (rc) 895fe56b9e6SYuval Mintz goto spq_post_fail2; 896fe56b9e6SYuval Mintz 897fe56b9e6SYuval Mintz /* return to pool */ 898fe56b9e6SYuval Mintz qed_spq_return_entry(p_hwfn, p_ent); 899fe56b9e6SYuval Mintz } 900fe56b9e6SYuval Mintz return rc; 901fe56b9e6SYuval Mintz 902fe56b9e6SYuval Mintz spq_post_fail2: 903fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 904fe56b9e6SYuval Mintz list_del(&p_ent->list); 9052632f22eSDenis Bolotin qed_spq_comp_bmap_update(p_hwfn, p_ent->elem.hdr.echo); 906fe56b9e6SYuval Mintz 907fe56b9e6SYuval Mintz spq_post_fail: 908fe56b9e6SYuval Mintz /* return to the free pool */ 909fe56b9e6SYuval Mintz if (b_ret_ent) 910fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 911fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 912fe56b9e6SYuval Mintz 913fe56b9e6SYuval Mintz return rc; 914fe56b9e6SYuval Mintz } 915fe56b9e6SYuval Mintz 916fe56b9e6SYuval Mintz int qed_spq_completion(struct qed_hwfn *p_hwfn, 917fe56b9e6SYuval Mintz __le16 echo, 918fe56b9e6SYuval Mintz u8 fw_return_code, 919fe56b9e6SYuval Mintz union event_ring_data *p_data) 920fe56b9e6SYuval Mintz { 921fe56b9e6SYuval Mintz struct qed_spq *p_spq; 922fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 923fe56b9e6SYuval Mintz struct qed_spq_entry *tmp; 924fe56b9e6SYuval Mintz struct qed_spq_entry *found = NULL; 925fe56b9e6SYuval Mintz 926fe56b9e6SYuval Mintz if (!p_hwfn) 927fe56b9e6SYuval Mintz return -EINVAL; 928fe56b9e6SYuval Mintz 929fe56b9e6SYuval Mintz p_spq = p_hwfn->p_spq; 930fe56b9e6SYuval Mintz if (!p_spq) 931fe56b9e6SYuval Mintz return -EINVAL; 932fe56b9e6SYuval Mintz 933fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 9341a635e48SYuval Mintz list_for_each_entry_safe(p_ent, tmp, &p_spq->completion_pending, list) { 935fe56b9e6SYuval Mintz if (p_ent->elem.hdr.echo == echo) { 936fe56b9e6SYuval Mintz list_del(&p_ent->list); 9372632f22eSDenis Bolotin qed_spq_comp_bmap_update(p_hwfn, echo); 938fe56b9e6SYuval Mintz p_spq->comp_count++; 939fe56b9e6SYuval Mintz found = p_ent; 940fe56b9e6SYuval Mintz break; 941fe56b9e6SYuval Mintz } 94276a9a364STomer Tayar 94376a9a364STomer Tayar /* This is relatively uncommon - depends on scenarios 94476a9a364STomer Tayar * which have mutliple per-PF sent ramrods. 94576a9a364STomer Tayar */ 94676a9a364STomer Tayar DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 94776a9a364STomer Tayar "Got completion for echo %04x - doesn't match echo %04x in completion pending list\n", 94876a9a364STomer Tayar le16_to_cpu(echo), 94976a9a364STomer Tayar le16_to_cpu(p_ent->elem.hdr.echo)); 950fe56b9e6SYuval Mintz } 951fe56b9e6SYuval Mintz 952fe56b9e6SYuval Mintz /* Release lock before callback, as callback may post 953fe56b9e6SYuval Mintz * an additional ramrod. 954fe56b9e6SYuval Mintz */ 955fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 956fe56b9e6SYuval Mintz 957fe56b9e6SYuval Mintz if (!found) { 958fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, 959525ef5c0SYuval Mintz "Failed to find an entry this EQE [echo %04x] completes\n", 960525ef5c0SYuval Mintz le16_to_cpu(echo)); 961fe56b9e6SYuval Mintz return -EEXIST; 962fe56b9e6SYuval Mintz } 963fe56b9e6SYuval Mintz 964525ef5c0SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 965525ef5c0SYuval Mintz "Complete EQE [echo %04x]: func %p cookie %p)\n", 966525ef5c0SYuval Mintz le16_to_cpu(echo), 967fe56b9e6SYuval Mintz p_ent->comp_cb.function, p_ent->comp_cb.cookie); 968fe56b9e6SYuval Mintz if (found->comp_cb.function) 969fe56b9e6SYuval Mintz found->comp_cb.function(p_hwfn, found->comp_cb.cookie, p_data, 970fe56b9e6SYuval Mintz fw_return_code); 971525ef5c0SYuval Mintz else 972525ef5c0SYuval Mintz DP_VERBOSE(p_hwfn, 973525ef5c0SYuval Mintz QED_MSG_SPQ, 974525ef5c0SYuval Mintz "Got a completion without a callback function\n"); 975fe56b9e6SYuval Mintz 9762632f22eSDenis Bolotin if (found->comp_mode != QED_SPQ_MODE_EBLOCK) 977db511c37SYuval Mintz /* EBLOCK is responsible for returning its own entry into the 9782632f22eSDenis Bolotin * free list. 979db511c37SYuval Mintz */ 980fe56b9e6SYuval Mintz qed_spq_return_entry(p_hwfn, found); 981fe56b9e6SYuval Mintz 982660492bcSManish Chopra return 0; 983fe56b9e6SYuval Mintz } 984fe56b9e6SYuval Mintz 985b6db3f71SAlexander Lobakin #define QED_SPQ_CONSQ_ELEM_SIZE 0x80 986b6db3f71SAlexander Lobakin 9873587cb87STomer Tayar int qed_consq_alloc(struct qed_hwfn *p_hwfn) 988fe56b9e6SYuval Mintz { 989b6db3f71SAlexander Lobakin struct qed_chain_init_params params = { 990b6db3f71SAlexander Lobakin .mode = QED_CHAIN_MODE_PBL, 991b6db3f71SAlexander Lobakin .intended_use = QED_CHAIN_USE_TO_PRODUCE, 992b6db3f71SAlexander Lobakin .cnt_type = QED_CHAIN_CNT_TYPE_U16, 993b6db3f71SAlexander Lobakin .num_elems = QED_CHAIN_PAGE_SIZE / QED_SPQ_CONSQ_ELEM_SIZE, 994b6db3f71SAlexander Lobakin .elem_size = QED_SPQ_CONSQ_ELEM_SIZE, 995b6db3f71SAlexander Lobakin }; 996fe56b9e6SYuval Mintz struct qed_consq *p_consq; 997b6db3f71SAlexander Lobakin int ret; 998fe56b9e6SYuval Mintz 999fe56b9e6SYuval Mintz /* Allocate ConsQ struct */ 100060fffb3bSYuval Mintz p_consq = kzalloc(sizeof(*p_consq), GFP_KERNEL); 10012591c280SJoe Perches if (!p_consq) 10023587cb87STomer Tayar return -ENOMEM; 1003fe56b9e6SYuval Mintz 1004b6db3f71SAlexander Lobakin /* Allocate and initialize ConsQ chain */ 1005b6db3f71SAlexander Lobakin ret = qed_chain_alloc(p_hwfn->cdev, &p_consq->chain, ¶ms); 1006b6db3f71SAlexander Lobakin if (ret) { 1007b6db3f71SAlexander Lobakin DP_NOTICE(p_hwfn, "Failed to allocate ConsQ chain"); 1008b6db3f71SAlexander Lobakin goto consq_alloc_fail; 1009b6db3f71SAlexander Lobakin } 1010fe56b9e6SYuval Mintz 10113587cb87STomer Tayar p_hwfn->p_consq = p_consq; 1012b6db3f71SAlexander Lobakin 10133587cb87STomer Tayar return 0; 1014fe56b9e6SYuval Mintz 1015b6db3f71SAlexander Lobakin consq_alloc_fail: 1016fe56b9e6SYuval Mintz kfree(p_consq); 1017b6db3f71SAlexander Lobakin 1018b6db3f71SAlexander Lobakin return ret; 10193587cb87STomer Tayar } 10203587cb87STomer Tayar 10213587cb87STomer Tayar void qed_consq_setup(struct qed_hwfn *p_hwfn) 10223587cb87STomer Tayar { 10233587cb87STomer Tayar qed_chain_reset(&p_hwfn->p_consq->chain); 10243587cb87STomer Tayar } 10253587cb87STomer Tayar 10263587cb87STomer Tayar void qed_consq_free(struct qed_hwfn *p_hwfn) 10273587cb87STomer Tayar { 10283587cb87STomer Tayar if (!p_hwfn->p_consq) 10293587cb87STomer Tayar return; 10303587cb87STomer Tayar 10313587cb87STomer Tayar qed_chain_free(p_hwfn->cdev, &p_hwfn->p_consq->chain); 10323587cb87STomer Tayar 10333587cb87STomer Tayar kfree(p_hwfn->p_consq); 10343587cb87STomer Tayar p_hwfn->p_consq = NULL; 1035fe56b9e6SYuval Mintz } 1036