1fe56b9e6SYuval Mintz /* QLogic qed NIC Driver 2e8f1cb50SMintz, Yuval * Copyright (c) 2015-2017 QLogic Corporation 3fe56b9e6SYuval Mintz * 4e8f1cb50SMintz, Yuval * This software is available to you under a choice of one of two 5e8f1cb50SMintz, Yuval * licenses. You may choose to be licensed under the terms of the GNU 6e8f1cb50SMintz, Yuval * General Public License (GPL) Version 2, available from the file 7e8f1cb50SMintz, Yuval * COPYING in the main directory of this source tree, or the 8e8f1cb50SMintz, Yuval * OpenIB.org BSD license below: 9e8f1cb50SMintz, Yuval * 10e8f1cb50SMintz, Yuval * Redistribution and use in source and binary forms, with or 11e8f1cb50SMintz, Yuval * without modification, are permitted provided that the following 12e8f1cb50SMintz, Yuval * conditions are met: 13e8f1cb50SMintz, Yuval * 14e8f1cb50SMintz, Yuval * - Redistributions of source code must retain the above 15e8f1cb50SMintz, Yuval * copyright notice, this list of conditions and the following 16e8f1cb50SMintz, Yuval * disclaimer. 17e8f1cb50SMintz, Yuval * 18e8f1cb50SMintz, Yuval * - Redistributions in binary form must reproduce the above 19e8f1cb50SMintz, Yuval * copyright notice, this list of conditions and the following 20e8f1cb50SMintz, Yuval * disclaimer in the documentation and /or other materials 21e8f1cb50SMintz, Yuval * provided with the distribution. 22e8f1cb50SMintz, Yuval * 23e8f1cb50SMintz, Yuval * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24e8f1cb50SMintz, Yuval * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25e8f1cb50SMintz, Yuval * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26e8f1cb50SMintz, Yuval * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27e8f1cb50SMintz, Yuval * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28e8f1cb50SMintz, Yuval * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29e8f1cb50SMintz, Yuval * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30e8f1cb50SMintz, Yuval * SOFTWARE. 31fe56b9e6SYuval Mintz */ 32fe56b9e6SYuval Mintz 33fe56b9e6SYuval Mintz #include <linux/types.h> 34fe56b9e6SYuval Mintz #include <asm/byteorder.h> 35fe56b9e6SYuval Mintz #include <linux/io.h> 36fe56b9e6SYuval Mintz #include <linux/delay.h> 37fe56b9e6SYuval Mintz #include <linux/dma-mapping.h> 38fe56b9e6SYuval Mintz #include <linux/errno.h> 39fe56b9e6SYuval Mintz #include <linux/kernel.h> 40fe56b9e6SYuval Mintz #include <linux/list.h> 41fe56b9e6SYuval Mintz #include <linux/pci.h> 42fe56b9e6SYuval Mintz #include <linux/slab.h> 43fe56b9e6SYuval Mintz #include <linux/spinlock.h> 44fe56b9e6SYuval Mintz #include <linux/string.h> 45fe56b9e6SYuval Mintz #include "qed.h" 46fe56b9e6SYuval Mintz #include "qed_cxt.h" 47fe56b9e6SYuval Mintz #include "qed_dev_api.h" 48fe56b9e6SYuval Mintz #include "qed_hsi.h" 49fe56b9e6SYuval Mintz #include "qed_hw.h" 50fe56b9e6SYuval Mintz #include "qed_int.h" 51fc831825SYuval Mintz #include "qed_iscsi.h" 52fe56b9e6SYuval Mintz #include "qed_mcp.h" 531d6cff4fSYuval Mintz #include "qed_ooo.h" 54fe56b9e6SYuval Mintz #include "qed_reg_addr.h" 55fe56b9e6SYuval Mintz #include "qed_sp.h" 5637bff2b9SYuval Mintz #include "qed_sriov.h" 57b71b9afdSKalderon, Michal #include "qed_rdma.h" 58fe56b9e6SYuval Mintz 59fe56b9e6SYuval Mintz /*************************************************************************** 60fe56b9e6SYuval Mintz * Structures & Definitions 61fe56b9e6SYuval Mintz ***************************************************************************/ 62fe56b9e6SYuval Mintz 63fe56b9e6SYuval Mintz #define SPQ_HIGH_PRI_RESERVE_DEFAULT (1) 64c59f5291SYuval Mintz 65c59f5291SYuval Mintz #define SPQ_BLOCK_DELAY_MAX_ITER (10) 66c59f5291SYuval Mintz #define SPQ_BLOCK_DELAY_US (10) 67c59f5291SYuval Mintz #define SPQ_BLOCK_SLEEP_MAX_ITER (1000) 68c59f5291SYuval Mintz #define SPQ_BLOCK_SLEEP_MS (5) 69fe56b9e6SYuval Mintz 70fe56b9e6SYuval Mintz /*************************************************************************** 71fe56b9e6SYuval Mintz * Blocking Imp. (BLOCK/EBLOCK mode) 72fe56b9e6SYuval Mintz ***************************************************************************/ 73fe56b9e6SYuval Mintz static void qed_spq_blocking_cb(struct qed_hwfn *p_hwfn, 74fe56b9e6SYuval Mintz void *cookie, 751a635e48SYuval Mintz union event_ring_data *data, u8 fw_return_code) 76fe56b9e6SYuval Mintz { 77fe56b9e6SYuval Mintz struct qed_spq_comp_done *comp_done; 78fe56b9e6SYuval Mintz 79fe56b9e6SYuval Mintz comp_done = (struct qed_spq_comp_done *)cookie; 80fe56b9e6SYuval Mintz 81fe56b9e6SYuval Mintz comp_done->fw_return_code = fw_return_code; 82fe56b9e6SYuval Mintz 83d5df7688SManish Chopra /* Make sure completion done is visible on waiting thread */ 84d5df7688SManish Chopra smp_store_release(&comp_done->done, 0x1); 85fe56b9e6SYuval Mintz } 86fe56b9e6SYuval Mintz 87c59f5291SYuval Mintz static int __qed_spq_block(struct qed_hwfn *p_hwfn, 88c59f5291SYuval Mintz struct qed_spq_entry *p_ent, 89c59f5291SYuval Mintz u8 *p_fw_ret, bool sleep_between_iter) 90c59f5291SYuval Mintz { 91c59f5291SYuval Mintz struct qed_spq_comp_done *comp_done; 92c59f5291SYuval Mintz u32 iter_cnt; 93c59f5291SYuval Mintz 94c59f5291SYuval Mintz comp_done = (struct qed_spq_comp_done *)p_ent->comp_cb.cookie; 95c59f5291SYuval Mintz iter_cnt = sleep_between_iter ? SPQ_BLOCK_SLEEP_MAX_ITER 96c59f5291SYuval Mintz : SPQ_BLOCK_DELAY_MAX_ITER; 97c59f5291SYuval Mintz 98c59f5291SYuval Mintz while (iter_cnt--) { 99c59f5291SYuval Mintz /* Validate we receive completion update */ 100cb7e125eSPaul E. McKenney if (smp_load_acquire(&comp_done->done) == 1) { /* ^^^ */ 101c59f5291SYuval Mintz if (p_fw_ret) 102c59f5291SYuval Mintz *p_fw_ret = comp_done->fw_return_code; 103c59f5291SYuval Mintz return 0; 104c59f5291SYuval Mintz } 105c59f5291SYuval Mintz 106c59f5291SYuval Mintz if (sleep_between_iter) 107c59f5291SYuval Mintz msleep(SPQ_BLOCK_SLEEP_MS); 108c59f5291SYuval Mintz else 109c59f5291SYuval Mintz udelay(SPQ_BLOCK_DELAY_US); 110c59f5291SYuval Mintz } 111c59f5291SYuval Mintz 112c59f5291SYuval Mintz return -EBUSY; 113c59f5291SYuval Mintz } 114c59f5291SYuval Mintz 115fe56b9e6SYuval Mintz static int qed_spq_block(struct qed_hwfn *p_hwfn, 116fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent, 117c59f5291SYuval Mintz u8 *p_fw_ret, bool skip_quick_poll) 118fe56b9e6SYuval Mintz { 119fe56b9e6SYuval Mintz struct qed_spq_comp_done *comp_done; 12015582962SRahul Verma struct qed_ptt *p_ptt; 121fe56b9e6SYuval Mintz int rc; 122fe56b9e6SYuval Mintz 123c59f5291SYuval Mintz /* A relatively short polling period w/o sleeping, to allow the FW to 124c59f5291SYuval Mintz * complete the ramrod and thus possibly to avoid the following sleeps. 125c59f5291SYuval Mintz */ 126c59f5291SYuval Mintz if (!skip_quick_poll) { 127c59f5291SYuval Mintz rc = __qed_spq_block(p_hwfn, p_ent, p_fw_ret, false); 128c59f5291SYuval Mintz if (!rc) 129fe56b9e6SYuval Mintz return 0; 130fe56b9e6SYuval Mintz } 131c59f5291SYuval Mintz 132c59f5291SYuval Mintz /* Move to polling with a sleeping period between iterations */ 133c59f5291SYuval Mintz rc = __qed_spq_block(p_hwfn, p_ent, p_fw_ret, true); 134c59f5291SYuval Mintz if (!rc) 135c59f5291SYuval Mintz return 0; 136fe56b9e6SYuval Mintz 13715582962SRahul Verma p_ptt = qed_ptt_acquire(p_hwfn); 13815582962SRahul Verma if (!p_ptt) { 13915582962SRahul Verma DP_NOTICE(p_hwfn, "ptt, failed to acquire\n"); 14015582962SRahul Verma return -EAGAIN; 14115582962SRahul Verma } 14215582962SRahul Verma 143fe56b9e6SYuval Mintz DP_INFO(p_hwfn, "Ramrod is stuck, requesting MCP drain\n"); 14415582962SRahul Verma rc = qed_mcp_drain(p_hwfn, p_ptt); 145fa5c448dSSagiv Ozeri qed_ptt_release(p_hwfn, p_ptt); 146c59f5291SYuval Mintz if (rc) { 147fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "MCP drain failed\n"); 148c59f5291SYuval Mintz goto err; 149c59f5291SYuval Mintz } 150fe56b9e6SYuval Mintz 151fe56b9e6SYuval Mintz /* Retry after drain */ 152c59f5291SYuval Mintz rc = __qed_spq_block(p_hwfn, p_ent, p_fw_ret, true); 153c59f5291SYuval Mintz if (!rc) 154fe56b9e6SYuval Mintz return 0; 15515582962SRahul Verma 156fa5c448dSSagiv Ozeri comp_done = (struct qed_spq_comp_done *)p_ent->comp_cb.cookie; 157fa5c448dSSagiv Ozeri if (comp_done->done == 1) { 158fa5c448dSSagiv Ozeri if (p_fw_ret) 159fa5c448dSSagiv Ozeri *p_fw_ret = comp_done->fw_return_code; 160fa5c448dSSagiv Ozeri return 0; 161fa5c448dSSagiv Ozeri } 162c59f5291SYuval Mintz err: 163c59f5291SYuval Mintz DP_NOTICE(p_hwfn, 164c59f5291SYuval Mintz "Ramrod is stuck [CID %08x cmd %02x protocol %02x echo %04x]\n", 165c59f5291SYuval Mintz le32_to_cpu(p_ent->elem.hdr.cid), 166c59f5291SYuval Mintz p_ent->elem.hdr.cmd_id, 167c59f5291SYuval Mintz p_ent->elem.hdr.protocol_id, 168c59f5291SYuval Mintz le16_to_cpu(p_ent->elem.hdr.echo)); 169fe56b9e6SYuval Mintz 170fe56b9e6SYuval Mintz return -EBUSY; 171fe56b9e6SYuval Mintz } 172fe56b9e6SYuval Mintz 173fe56b9e6SYuval Mintz /*************************************************************************** 174fe56b9e6SYuval Mintz * SPQ entries inner API 175fe56b9e6SYuval Mintz ***************************************************************************/ 1761a635e48SYuval Mintz static int qed_spq_fill_entry(struct qed_hwfn *p_hwfn, 177fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent) 178fe56b9e6SYuval Mintz { 179fe56b9e6SYuval Mintz p_ent->flags = 0; 180fe56b9e6SYuval Mintz 181fe56b9e6SYuval Mintz switch (p_ent->comp_mode) { 182fe56b9e6SYuval Mintz case QED_SPQ_MODE_EBLOCK: 183fe56b9e6SYuval Mintz case QED_SPQ_MODE_BLOCK: 184fe56b9e6SYuval Mintz p_ent->comp_cb.function = qed_spq_blocking_cb; 185fe56b9e6SYuval Mintz break; 186fe56b9e6SYuval Mintz case QED_SPQ_MODE_CB: 187fe56b9e6SYuval Mintz break; 188fe56b9e6SYuval Mintz default: 189fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Unknown SPQE completion mode %d\n", 190fe56b9e6SYuval Mintz p_ent->comp_mode); 191fe56b9e6SYuval Mintz return -EINVAL; 192fe56b9e6SYuval Mintz } 193fe56b9e6SYuval Mintz 194fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 195fe56b9e6SYuval Mintz "Ramrod header: [CID 0x%08x CMD 0x%02x protocol 0x%02x] Data pointer: [%08x:%08x] Completion Mode: %s\n", 196fe56b9e6SYuval Mintz p_ent->elem.hdr.cid, 197fe56b9e6SYuval Mintz p_ent->elem.hdr.cmd_id, 198fe56b9e6SYuval Mintz p_ent->elem.hdr.protocol_id, 199fe56b9e6SYuval Mintz p_ent->elem.data_ptr.hi, 200fe56b9e6SYuval Mintz p_ent->elem.data_ptr.lo, 201fe56b9e6SYuval Mintz D_TRINE(p_ent->comp_mode, QED_SPQ_MODE_EBLOCK, 202fe56b9e6SYuval Mintz QED_SPQ_MODE_BLOCK, "MODE_EBLOCK", "MODE_BLOCK", 203fe56b9e6SYuval Mintz "MODE_CB")); 204fe56b9e6SYuval Mintz 205fe56b9e6SYuval Mintz return 0; 206fe56b9e6SYuval Mintz } 207fe56b9e6SYuval Mintz 208fe56b9e6SYuval Mintz /*************************************************************************** 209fe56b9e6SYuval Mintz * HSI access 210fe56b9e6SYuval Mintz ***************************************************************************/ 211fe56b9e6SYuval Mintz static void qed_spq_hw_initialize(struct qed_hwfn *p_hwfn, 212fe56b9e6SYuval Mintz struct qed_spq *p_spq) 213fe56b9e6SYuval Mintz { 21421dd79e8STomer Tayar struct e4_core_conn_context *p_cxt; 215b5a9ee7cSAriel Elior struct qed_cxt_info cxt_info; 216b5a9ee7cSAriel Elior u16 physical_q; 217fe56b9e6SYuval Mintz int rc; 218fe56b9e6SYuval Mintz 219fe56b9e6SYuval Mintz cxt_info.iid = p_spq->cid; 220fe56b9e6SYuval Mintz 221fe56b9e6SYuval Mintz rc = qed_cxt_get_cid_info(p_hwfn, &cxt_info); 222fe56b9e6SYuval Mintz 223fe56b9e6SYuval Mintz if (rc < 0) { 224fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Cannot find context info for cid=%d\n", 225fe56b9e6SYuval Mintz p_spq->cid); 226fe56b9e6SYuval Mintz return; 227fe56b9e6SYuval Mintz } 228fe56b9e6SYuval Mintz 229fe56b9e6SYuval Mintz p_cxt = cxt_info.p_cxt; 230fe56b9e6SYuval Mintz 231fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags10, 23221dd79e8STomer Tayar E4_XSTORM_CORE_CONN_AG_CTX_DQ_CF_EN, 1); 233fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags1, 23421dd79e8STomer Tayar E4_XSTORM_CORE_CONN_AG_CTX_DQ_CF_ACTIVE, 1); 235fe56b9e6SYuval Mintz SET_FIELD(p_cxt->xstorm_ag_context.flags9, 23621dd79e8STomer Tayar E4_XSTORM_CORE_CONN_AG_CTX_CONSOLID_PROD_CF_EN, 1); 237fe56b9e6SYuval Mintz 238fe56b9e6SYuval Mintz /* QM physical queue */ 239b5a9ee7cSAriel Elior physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_LB); 240b5a9ee7cSAriel Elior p_cxt->xstorm_ag_context.physical_q0 = cpu_to_le16(physical_q); 241fe56b9e6SYuval Mintz 242fe56b9e6SYuval Mintz p_cxt->xstorm_st_context.spq_base_lo = 243fe56b9e6SYuval Mintz DMA_LO_LE(p_spq->chain.p_phys_addr); 244fe56b9e6SYuval Mintz p_cxt->xstorm_st_context.spq_base_hi = 245fe56b9e6SYuval Mintz DMA_HI_LE(p_spq->chain.p_phys_addr); 246fe56b9e6SYuval Mintz 24794494598SYuval Mintz DMA_REGPAIR_LE(p_cxt->xstorm_st_context.consolid_base_addr, 24894494598SYuval Mintz p_hwfn->p_consq->chain.p_phys_addr); 249fe56b9e6SYuval Mintz } 250fe56b9e6SYuval Mintz 251fe56b9e6SYuval Mintz static int qed_spq_hw_post(struct qed_hwfn *p_hwfn, 2521a635e48SYuval Mintz struct qed_spq *p_spq, struct qed_spq_entry *p_ent) 253fe56b9e6SYuval Mintz { 254fe56b9e6SYuval Mintz struct qed_chain *p_chain = &p_hwfn->p_spq->chain; 25576a9a364STomer Tayar u16 echo = qed_chain_get_prod_idx(p_chain); 256fe56b9e6SYuval Mintz struct slow_path_element *elem; 257fe56b9e6SYuval Mintz struct core_db_data db; 258fe56b9e6SYuval Mintz 25976a9a364STomer Tayar p_ent->elem.hdr.echo = cpu_to_le16(echo); 260fe56b9e6SYuval Mintz elem = qed_chain_produce(p_chain); 261fe56b9e6SYuval Mintz if (!elem) { 262fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Failed to produce from SPQ chain\n"); 263fe56b9e6SYuval Mintz return -EINVAL; 264fe56b9e6SYuval Mintz } 265fe56b9e6SYuval Mintz 266fe56b9e6SYuval Mintz *elem = p_ent->elem; /* struct assignment */ 267fe56b9e6SYuval Mintz 268fe56b9e6SYuval Mintz /* send a doorbell on the slow hwfn session */ 269fe56b9e6SYuval Mintz memset(&db, 0, sizeof(db)); 270fe56b9e6SYuval Mintz SET_FIELD(db.params, CORE_DB_DATA_DEST, DB_DEST_XCM); 271fe56b9e6SYuval Mintz SET_FIELD(db.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET); 272fe56b9e6SYuval Mintz SET_FIELD(db.params, CORE_DB_DATA_AGG_VAL_SEL, 273fe56b9e6SYuval Mintz DQ_XCM_CORE_SPQ_PROD_CMD); 274fe56b9e6SYuval Mintz db.agg_flags = DQ_XCM_CORE_DQ_CF_CMD; 275fe56b9e6SYuval Mintz db.spq_prod = cpu_to_le16(qed_chain_get_prod_idx(p_chain)); 276fe56b9e6SYuval Mintz 27734c7bb47SSudarsana Reddy Kalluru /* make sure the SPQE is updated before the doorbell */ 27834c7bb47SSudarsana Reddy Kalluru wmb(); 279fe56b9e6SYuval Mintz 280fe56b9e6SYuval Mintz DOORBELL(p_hwfn, qed_db_addr(p_spq->cid, DQ_DEMS_LEGACY), *(u32 *)&db); 281fe56b9e6SYuval Mintz 282fe56b9e6SYuval Mintz /* make sure doorbell is rang */ 28334c7bb47SSudarsana Reddy Kalluru wmb(); 284fe56b9e6SYuval Mintz 285fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 286fe56b9e6SYuval Mintz "Doorbelled [0x%08x, CID 0x%08x] with Flags: %02x agg_params: %02x, prod: %04x\n", 287fe56b9e6SYuval Mintz qed_db_addr(p_spq->cid, DQ_DEMS_LEGACY), 288fe56b9e6SYuval Mintz p_spq->cid, db.params, db.agg_flags, 289fe56b9e6SYuval Mintz qed_chain_get_prod_idx(p_chain)); 290fe56b9e6SYuval Mintz 291fe56b9e6SYuval Mintz return 0; 292fe56b9e6SYuval Mintz } 293fe56b9e6SYuval Mintz 294fe56b9e6SYuval Mintz /*************************************************************************** 295fe56b9e6SYuval Mintz * Asynchronous events 296fe56b9e6SYuval Mintz ***************************************************************************/ 297fe56b9e6SYuval Mintz static int 298fe56b9e6SYuval Mintz qed_async_event_completion(struct qed_hwfn *p_hwfn, 299fe56b9e6SYuval Mintz struct event_ring_entry *p_eqe) 300fe56b9e6SYuval Mintz { 3016c9e80eaSMichal Kalderon qed_spq_async_comp_cb cb; 3026c9e80eaSMichal Kalderon 3036c9e80eaSMichal Kalderon if (!p_hwfn->p_spq || (p_eqe->protocol_id >= MAX_PROTOCOL_TYPE)) 304fc831825SYuval Mintz return -EINVAL; 305fc831825SYuval Mintz 3066c9e80eaSMichal Kalderon cb = p_hwfn->p_spq->async_comp_cb[p_eqe->protocol_id]; 3076c9e80eaSMichal Kalderon if (cb) { 3086c9e80eaSMichal Kalderon return cb(p_hwfn, p_eqe->opcode, p_eqe->echo, 3096c9e80eaSMichal Kalderon &p_eqe->data, p_eqe->fw_return_code); 310fc831825SYuval Mintz } else { 311fc831825SYuval Mintz DP_NOTICE(p_hwfn, 312fe56b9e6SYuval Mintz "Unknown Async completion for protocol: %d\n", 313fe56b9e6SYuval Mintz p_eqe->protocol_id); 314fe56b9e6SYuval Mintz return -EINVAL; 315fe56b9e6SYuval Mintz } 31637bff2b9SYuval Mintz } 317fe56b9e6SYuval Mintz 3186c9e80eaSMichal Kalderon int 3196c9e80eaSMichal Kalderon qed_spq_register_async_cb(struct qed_hwfn *p_hwfn, 3206c9e80eaSMichal Kalderon enum protocol_type protocol_id, 3216c9e80eaSMichal Kalderon qed_spq_async_comp_cb cb) 3226c9e80eaSMichal Kalderon { 3236c9e80eaSMichal Kalderon if (!p_hwfn->p_spq || (protocol_id >= MAX_PROTOCOL_TYPE)) 3246c9e80eaSMichal Kalderon return -EINVAL; 3256c9e80eaSMichal Kalderon 3266c9e80eaSMichal Kalderon p_hwfn->p_spq->async_comp_cb[protocol_id] = cb; 3276c9e80eaSMichal Kalderon return 0; 3286c9e80eaSMichal Kalderon } 3296c9e80eaSMichal Kalderon 3306c9e80eaSMichal Kalderon void 3316c9e80eaSMichal Kalderon qed_spq_unregister_async_cb(struct qed_hwfn *p_hwfn, 3326c9e80eaSMichal Kalderon enum protocol_type protocol_id) 3336c9e80eaSMichal Kalderon { 3346c9e80eaSMichal Kalderon if (!p_hwfn->p_spq || (protocol_id >= MAX_PROTOCOL_TYPE)) 3356c9e80eaSMichal Kalderon return; 3366c9e80eaSMichal Kalderon 3376c9e80eaSMichal Kalderon p_hwfn->p_spq->async_comp_cb[protocol_id] = NULL; 3386c9e80eaSMichal Kalderon } 3396c9e80eaSMichal Kalderon 340fe56b9e6SYuval Mintz /*************************************************************************** 341fe56b9e6SYuval Mintz * EQ API 342fe56b9e6SYuval Mintz ***************************************************************************/ 3431a635e48SYuval Mintz void qed_eq_prod_update(struct qed_hwfn *p_hwfn, u16 prod) 344fe56b9e6SYuval Mintz { 345fe56b9e6SYuval Mintz u32 addr = GTT_BAR0_MAP_REG_USDM_RAM + 346fe56b9e6SYuval Mintz USTORM_EQE_CONS_OFFSET(p_hwfn->rel_pf_id); 347fe56b9e6SYuval Mintz 348fe56b9e6SYuval Mintz REG_WR16(p_hwfn, addr, prod); 349fe56b9e6SYuval Mintz 350fe56b9e6SYuval Mintz /* keep prod updates ordered */ 351fe56b9e6SYuval Mintz mmiowb(); 352fe56b9e6SYuval Mintz } 353fe56b9e6SYuval Mintz 3541a635e48SYuval Mintz int qed_eq_completion(struct qed_hwfn *p_hwfn, void *cookie) 355fe56b9e6SYuval Mintz { 356fe56b9e6SYuval Mintz struct qed_eq *p_eq = cookie; 357fe56b9e6SYuval Mintz struct qed_chain *p_chain = &p_eq->chain; 358fe56b9e6SYuval Mintz int rc = 0; 359fe56b9e6SYuval Mintz 360fe56b9e6SYuval Mintz /* take a snapshot of the FW consumer */ 361fe56b9e6SYuval Mintz u16 fw_cons_idx = le16_to_cpu(*p_eq->p_fw_cons); 362fe56b9e6SYuval Mintz 363fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, "fw_cons_idx %x\n", fw_cons_idx); 364fe56b9e6SYuval Mintz 365fe56b9e6SYuval Mintz /* Need to guarantee the fw_cons index we use points to a usuable 366fe56b9e6SYuval Mintz * element (to comply with our chain), so our macros would comply 367fe56b9e6SYuval Mintz */ 368fe56b9e6SYuval Mintz if ((fw_cons_idx & qed_chain_get_usable_per_page(p_chain)) == 369fe56b9e6SYuval Mintz qed_chain_get_usable_per_page(p_chain)) 370fe56b9e6SYuval Mintz fw_cons_idx += qed_chain_get_unusable_per_page(p_chain); 371fe56b9e6SYuval Mintz 372fe56b9e6SYuval Mintz /* Complete current segment of eq entries */ 373fe56b9e6SYuval Mintz while (fw_cons_idx != qed_chain_get_cons_idx(p_chain)) { 374fe56b9e6SYuval Mintz struct event_ring_entry *p_eqe = qed_chain_consume(p_chain); 375fe56b9e6SYuval Mintz 376fe56b9e6SYuval Mintz if (!p_eqe) { 377fe56b9e6SYuval Mintz rc = -EINVAL; 378fe56b9e6SYuval Mintz break; 379fe56b9e6SYuval Mintz } 380fe56b9e6SYuval Mintz 381fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 382fe56b9e6SYuval Mintz "op %x prot %x res0 %x echo %x fwret %x flags %x\n", 383fe56b9e6SYuval Mintz p_eqe->opcode, 384fe56b9e6SYuval Mintz p_eqe->protocol_id, 385fe56b9e6SYuval Mintz p_eqe->reserved0, 386fe56b9e6SYuval Mintz le16_to_cpu(p_eqe->echo), 387fe56b9e6SYuval Mintz p_eqe->fw_return_code, 388fe56b9e6SYuval Mintz p_eqe->flags); 389fe56b9e6SYuval Mintz 390fe56b9e6SYuval Mintz if (GET_FIELD(p_eqe->flags, EVENT_RING_ENTRY_ASYNC)) { 391fe56b9e6SYuval Mintz if (qed_async_event_completion(p_hwfn, p_eqe)) 392fe56b9e6SYuval Mintz rc = -EINVAL; 393fe56b9e6SYuval Mintz } else if (qed_spq_completion(p_hwfn, 394fe56b9e6SYuval Mintz p_eqe->echo, 395fe56b9e6SYuval Mintz p_eqe->fw_return_code, 396fe56b9e6SYuval Mintz &p_eqe->data)) { 397fe56b9e6SYuval Mintz rc = -EINVAL; 398fe56b9e6SYuval Mintz } 399fe56b9e6SYuval Mintz 400fe56b9e6SYuval Mintz qed_chain_recycle_consumed(p_chain); 401fe56b9e6SYuval Mintz } 402fe56b9e6SYuval Mintz 403fe56b9e6SYuval Mintz qed_eq_prod_update(p_hwfn, qed_chain_get_prod_idx(p_chain)); 404fe56b9e6SYuval Mintz 405fe56b9e6SYuval Mintz return rc; 406fe56b9e6SYuval Mintz } 407fe56b9e6SYuval Mintz 4083587cb87STomer Tayar int qed_eq_alloc(struct qed_hwfn *p_hwfn, u16 num_elem) 409fe56b9e6SYuval Mintz { 410fe56b9e6SYuval Mintz struct qed_eq *p_eq; 411fe56b9e6SYuval Mintz 412fe56b9e6SYuval Mintz /* Allocate EQ struct */ 41360fffb3bSYuval Mintz p_eq = kzalloc(sizeof(*p_eq), GFP_KERNEL); 4142591c280SJoe Perches if (!p_eq) 4153587cb87STomer Tayar return -ENOMEM; 416fe56b9e6SYuval Mintz 417fe56b9e6SYuval Mintz /* Allocate and initialize EQ chain*/ 418fe56b9e6SYuval Mintz if (qed_chain_alloc(p_hwfn->cdev, 419fe56b9e6SYuval Mintz QED_CHAIN_USE_TO_PRODUCE, 420fe56b9e6SYuval Mintz QED_CHAIN_MODE_PBL, 421a91eb52aSYuval Mintz QED_CHAIN_CNT_TYPE_U16, 422fe56b9e6SYuval Mintz num_elem, 423fe56b9e6SYuval Mintz sizeof(union event_ring_element), 4241a4a6975SMintz, Yuval &p_eq->chain, NULL)) 425fe56b9e6SYuval Mintz goto eq_allocate_fail; 426fe56b9e6SYuval Mintz 427fe56b9e6SYuval Mintz /* register EQ completion on the SP SB */ 4281a635e48SYuval Mintz qed_int_register_cb(p_hwfn, qed_eq_completion, 4291a635e48SYuval Mintz p_eq, &p_eq->eq_sb_index, &p_eq->p_fw_cons); 430fe56b9e6SYuval Mintz 4313587cb87STomer Tayar p_hwfn->p_eq = p_eq; 4323587cb87STomer Tayar return 0; 433fe56b9e6SYuval Mintz 434fe56b9e6SYuval Mintz eq_allocate_fail: 435fe56b9e6SYuval Mintz kfree(p_eq); 4363587cb87STomer Tayar return -ENOMEM; 4373587cb87STomer Tayar } 4383587cb87STomer Tayar 4393587cb87STomer Tayar void qed_eq_setup(struct qed_hwfn *p_hwfn) 4403587cb87STomer Tayar { 4413587cb87STomer Tayar qed_chain_reset(&p_hwfn->p_eq->chain); 4423587cb87STomer Tayar } 4433587cb87STomer Tayar 4443587cb87STomer Tayar void qed_eq_free(struct qed_hwfn *p_hwfn) 4453587cb87STomer Tayar { 4463587cb87STomer Tayar if (!p_hwfn->p_eq) 4473587cb87STomer Tayar return; 4483587cb87STomer Tayar 4493587cb87STomer Tayar qed_chain_free(p_hwfn->cdev, &p_hwfn->p_eq->chain); 4503587cb87STomer Tayar 4513587cb87STomer Tayar kfree(p_hwfn->p_eq); 4523587cb87STomer Tayar p_hwfn->p_eq = NULL; 453fe56b9e6SYuval Mintz } 454fe56b9e6SYuval Mintz 455fe56b9e6SYuval Mintz /*************************************************************************** 456cee4d264SManish Chopra * CQE API - manipulate EQ functionality 457cee4d264SManish Chopra ***************************************************************************/ 4581a635e48SYuval Mintz static int qed_cqe_completion(struct qed_hwfn *p_hwfn, 459cee4d264SManish Chopra struct eth_slow_path_rx_cqe *cqe, 460cee4d264SManish Chopra enum protocol_type protocol) 461cee4d264SManish Chopra { 4621408cc1fSYuval Mintz if (IS_VF(p_hwfn->cdev)) 4631408cc1fSYuval Mintz return 0; 4641408cc1fSYuval Mintz 465cee4d264SManish Chopra /* @@@tmp - it's possible we'll eventually want to handle some 466cee4d264SManish Chopra * actual commands that can arrive here, but for now this is only 467cee4d264SManish Chopra * used to complete the ramrod using the echo value on the cqe 468cee4d264SManish Chopra */ 469cee4d264SManish Chopra return qed_spq_completion(p_hwfn, cqe->echo, 0, NULL); 470cee4d264SManish Chopra } 471cee4d264SManish Chopra 472cee4d264SManish Chopra int qed_eth_cqe_completion(struct qed_hwfn *p_hwfn, 473cee4d264SManish Chopra struct eth_slow_path_rx_cqe *cqe) 474cee4d264SManish Chopra { 475cee4d264SManish Chopra int rc; 476cee4d264SManish Chopra 477cee4d264SManish Chopra rc = qed_cqe_completion(p_hwfn, cqe, PROTOCOLID_ETH); 478cee4d264SManish Chopra if (rc) 479cee4d264SManish Chopra DP_NOTICE(p_hwfn, 480cee4d264SManish Chopra "Failed to handle RXQ CQE [cmd 0x%02x]\n", 481cee4d264SManish Chopra cqe->ramrod_cmd_id); 482cee4d264SManish Chopra 483cee4d264SManish Chopra return rc; 484cee4d264SManish Chopra } 485cee4d264SManish Chopra 486cee4d264SManish Chopra /*************************************************************************** 487fe56b9e6SYuval Mintz * Slow hwfn Queue (spq) 488fe56b9e6SYuval Mintz ***************************************************************************/ 489fe56b9e6SYuval Mintz void qed_spq_setup(struct qed_hwfn *p_hwfn) 490fe56b9e6SYuval Mintz { 491fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 492fe56b9e6SYuval Mintz struct qed_spq_entry *p_virt = NULL; 493fe56b9e6SYuval Mintz dma_addr_t p_phys = 0; 494a91eb52aSYuval Mintz u32 i, capacity; 495fe56b9e6SYuval Mintz 496fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->pending); 497fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->completion_pending); 498fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->free_pool); 499fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->unlimited_pending); 500fe56b9e6SYuval Mintz spin_lock_init(&p_spq->lock); 501fe56b9e6SYuval Mintz 502fe56b9e6SYuval Mintz /* SPQ empty pool */ 503fe56b9e6SYuval Mintz p_phys = p_spq->p_phys + offsetof(struct qed_spq_entry, ramrod); 504fe56b9e6SYuval Mintz p_virt = p_spq->p_virt; 505fe56b9e6SYuval Mintz 506a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 507a91eb52aSYuval Mintz for (i = 0; i < capacity; i++) { 50894494598SYuval Mintz DMA_REGPAIR_LE(p_virt->elem.data_ptr, p_phys); 509fe56b9e6SYuval Mintz 510fe56b9e6SYuval Mintz list_add_tail(&p_virt->list, &p_spq->free_pool); 511fe56b9e6SYuval Mintz 512fe56b9e6SYuval Mintz p_virt++; 513fe56b9e6SYuval Mintz p_phys += sizeof(struct qed_spq_entry); 514fe56b9e6SYuval Mintz } 515fe56b9e6SYuval Mintz 516fe56b9e6SYuval Mintz /* Statistics */ 517fe56b9e6SYuval Mintz p_spq->normal_count = 0; 518fe56b9e6SYuval Mintz p_spq->comp_count = 0; 519fe56b9e6SYuval Mintz p_spq->comp_sent_count = 0; 520fe56b9e6SYuval Mintz p_spq->unlimited_pending_count = 0; 52176a9a364STomer Tayar 52276a9a364STomer Tayar bitmap_zero(p_spq->p_comp_bitmap, SPQ_RING_SIZE); 52376a9a364STomer Tayar p_spq->comp_bitmap_idx = 0; 524fe56b9e6SYuval Mintz 525fe56b9e6SYuval Mintz /* SPQ cid, cannot fail */ 526fe56b9e6SYuval Mintz qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_spq->cid); 527fe56b9e6SYuval Mintz qed_spq_hw_initialize(p_hwfn, p_spq); 528fe56b9e6SYuval Mintz 529fe56b9e6SYuval Mintz /* reset the chain itself */ 530fe56b9e6SYuval Mintz qed_chain_reset(&p_spq->chain); 531fe56b9e6SYuval Mintz } 532fe56b9e6SYuval Mintz 533fe56b9e6SYuval Mintz int qed_spq_alloc(struct qed_hwfn *p_hwfn) 534fe56b9e6SYuval Mintz { 535a91eb52aSYuval Mintz struct qed_spq_entry *p_virt = NULL; 536fe56b9e6SYuval Mintz struct qed_spq *p_spq = NULL; 537fe56b9e6SYuval Mintz dma_addr_t p_phys = 0; 538a91eb52aSYuval Mintz u32 capacity; 539fe56b9e6SYuval Mintz 540fe56b9e6SYuval Mintz /* SPQ struct */ 5411a635e48SYuval Mintz p_spq = kzalloc(sizeof(struct qed_spq), GFP_KERNEL); 5422591c280SJoe Perches if (!p_spq) 543fe56b9e6SYuval Mintz return -ENOMEM; 544fe56b9e6SYuval Mintz 545fe56b9e6SYuval Mintz /* SPQ ring */ 546fe56b9e6SYuval Mintz if (qed_chain_alloc(p_hwfn->cdev, 547fe56b9e6SYuval Mintz QED_CHAIN_USE_TO_PRODUCE, 548fe56b9e6SYuval Mintz QED_CHAIN_MODE_SINGLE, 549a91eb52aSYuval Mintz QED_CHAIN_CNT_TYPE_U16, 550fe56b9e6SYuval Mintz 0, /* N/A when the mode is SINGLE */ 551fe56b9e6SYuval Mintz sizeof(struct slow_path_element), 5521a4a6975SMintz, Yuval &p_spq->chain, NULL)) 553fe56b9e6SYuval Mintz goto spq_allocate_fail; 554fe56b9e6SYuval Mintz 555fe56b9e6SYuval Mintz /* allocate and fill the SPQ elements (incl. ramrod data list) */ 556a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 557fe56b9e6SYuval Mintz p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev, 5582591c280SJoe Perches capacity * sizeof(struct qed_spq_entry), 559a91eb52aSYuval Mintz &p_phys, GFP_KERNEL); 560fe56b9e6SYuval Mintz if (!p_virt) 561fe56b9e6SYuval Mintz goto spq_allocate_fail; 562fe56b9e6SYuval Mintz 563fe56b9e6SYuval Mintz p_spq->p_virt = p_virt; 564fe56b9e6SYuval Mintz p_spq->p_phys = p_phys; 565fe56b9e6SYuval Mintz p_hwfn->p_spq = p_spq; 566fe56b9e6SYuval Mintz 567fe56b9e6SYuval Mintz return 0; 568fe56b9e6SYuval Mintz 569fe56b9e6SYuval Mintz spq_allocate_fail: 570fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_spq->chain); 571fe56b9e6SYuval Mintz kfree(p_spq); 572fe56b9e6SYuval Mintz return -ENOMEM; 573fe56b9e6SYuval Mintz } 574fe56b9e6SYuval Mintz 575fe56b9e6SYuval Mintz void qed_spq_free(struct qed_hwfn *p_hwfn) 576fe56b9e6SYuval Mintz { 577fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 578a91eb52aSYuval Mintz u32 capacity; 579fe56b9e6SYuval Mintz 580fe56b9e6SYuval Mintz if (!p_spq) 581fe56b9e6SYuval Mintz return; 582fe56b9e6SYuval Mintz 583a91eb52aSYuval Mintz if (p_spq->p_virt) { 584a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 585fe56b9e6SYuval Mintz dma_free_coherent(&p_hwfn->cdev->pdev->dev, 586a91eb52aSYuval Mintz capacity * 587fe56b9e6SYuval Mintz sizeof(struct qed_spq_entry), 588a91eb52aSYuval Mintz p_spq->p_virt, p_spq->p_phys); 589a91eb52aSYuval Mintz } 590fe56b9e6SYuval Mintz 591fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_spq->chain); 592fe56b9e6SYuval Mintz kfree(p_spq); 5933587cb87STomer Tayar p_hwfn->p_spq = NULL; 594fe56b9e6SYuval Mintz } 595fe56b9e6SYuval Mintz 5961a635e48SYuval Mintz int qed_spq_get_entry(struct qed_hwfn *p_hwfn, struct qed_spq_entry **pp_ent) 597fe56b9e6SYuval Mintz { 598fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 599fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 600fe56b9e6SYuval Mintz int rc = 0; 601fe56b9e6SYuval Mintz 602fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 603fe56b9e6SYuval Mintz 604fe56b9e6SYuval Mintz if (list_empty(&p_spq->free_pool)) { 605fe56b9e6SYuval Mintz p_ent = kzalloc(sizeof(*p_ent), GFP_ATOMIC); 606fe56b9e6SYuval Mintz if (!p_ent) { 6071a635e48SYuval Mintz DP_NOTICE(p_hwfn, 6081a635e48SYuval Mintz "Failed to allocate an SPQ entry for a pending ramrod\n"); 609fe56b9e6SYuval Mintz rc = -ENOMEM; 610fe56b9e6SYuval Mintz goto out_unlock; 611fe56b9e6SYuval Mintz } 612fe56b9e6SYuval Mintz p_ent->queue = &p_spq->unlimited_pending; 613fe56b9e6SYuval Mintz } else { 614fe56b9e6SYuval Mintz p_ent = list_first_entry(&p_spq->free_pool, 6151a635e48SYuval Mintz struct qed_spq_entry, list); 616fe56b9e6SYuval Mintz list_del(&p_ent->list); 617fe56b9e6SYuval Mintz p_ent->queue = &p_spq->pending; 618fe56b9e6SYuval Mintz } 619fe56b9e6SYuval Mintz 620fe56b9e6SYuval Mintz *pp_ent = p_ent; 621fe56b9e6SYuval Mintz 622fe56b9e6SYuval Mintz out_unlock: 623fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 624fe56b9e6SYuval Mintz return rc; 625fe56b9e6SYuval Mintz } 626fe56b9e6SYuval Mintz 627fe56b9e6SYuval Mintz /* Locked variant; Should be called while the SPQ lock is taken */ 628fe56b9e6SYuval Mintz static void __qed_spq_return_entry(struct qed_hwfn *p_hwfn, 629fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent) 630fe56b9e6SYuval Mintz { 631fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_hwfn->p_spq->free_pool); 632fe56b9e6SYuval Mintz } 633fe56b9e6SYuval Mintz 6341a635e48SYuval Mintz void qed_spq_return_entry(struct qed_hwfn *p_hwfn, struct qed_spq_entry *p_ent) 635fe56b9e6SYuval Mintz { 636fe56b9e6SYuval Mintz spin_lock_bh(&p_hwfn->p_spq->lock); 637fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 638fe56b9e6SYuval Mintz spin_unlock_bh(&p_hwfn->p_spq->lock); 639fe56b9e6SYuval Mintz } 640fe56b9e6SYuval Mintz 641fe56b9e6SYuval Mintz /** 642fe56b9e6SYuval Mintz * @brief qed_spq_add_entry - adds a new entry to the pending 643fe56b9e6SYuval Mintz * list. Should be used while lock is being held. 644fe56b9e6SYuval Mintz * 645fe56b9e6SYuval Mintz * Addes an entry to the pending list is there is room (en empty 646fe56b9e6SYuval Mintz * element is available in the free_pool), or else places the 647fe56b9e6SYuval Mintz * entry in the unlimited_pending pool. 648fe56b9e6SYuval Mintz * 649fe56b9e6SYuval Mintz * @param p_hwfn 650fe56b9e6SYuval Mintz * @param p_ent 651fe56b9e6SYuval Mintz * @param priority 652fe56b9e6SYuval Mintz * 653fe56b9e6SYuval Mintz * @return int 654fe56b9e6SYuval Mintz */ 6551a635e48SYuval Mintz static int qed_spq_add_entry(struct qed_hwfn *p_hwfn, 656fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent, 657fe56b9e6SYuval Mintz enum spq_priority priority) 658fe56b9e6SYuval Mintz { 659fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 660fe56b9e6SYuval Mintz 661fe56b9e6SYuval Mintz if (p_ent->queue == &p_spq->unlimited_pending) { 662fe56b9e6SYuval Mintz 663fe56b9e6SYuval Mintz if (list_empty(&p_spq->free_pool)) { 664fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->unlimited_pending); 665fe56b9e6SYuval Mintz p_spq->unlimited_pending_count++; 666fe56b9e6SYuval Mintz 667fe56b9e6SYuval Mintz return 0; 66876a9a364STomer Tayar } else { 66976a9a364STomer Tayar struct qed_spq_entry *p_en2; 670fe56b9e6SYuval Mintz 671fe56b9e6SYuval Mintz p_en2 = list_first_entry(&p_spq->free_pool, 6721a635e48SYuval Mintz struct qed_spq_entry, list); 673fe56b9e6SYuval Mintz list_del(&p_en2->list); 674fe56b9e6SYuval Mintz 67576a9a364STomer Tayar /* Copy the ring element physical pointer to the new 67676a9a364STomer Tayar * entry, since we are about to override the entire ring 67776a9a364STomer Tayar * entry and don't want to lose the pointer. 67876a9a364STomer Tayar */ 67976a9a364STomer Tayar p_ent->elem.data_ptr = p_en2->elem.data_ptr; 68076a9a364STomer Tayar 681fe56b9e6SYuval Mintz *p_en2 = *p_ent; 682fe56b9e6SYuval Mintz 683db511c37SYuval Mintz /* EBLOCK responsible to free the allocated p_ent */ 684db511c37SYuval Mintz if (p_ent->comp_mode != QED_SPQ_MODE_EBLOCK) 685fe56b9e6SYuval Mintz kfree(p_ent); 6862632f22eSDenis Bolotin else 6872632f22eSDenis Bolotin p_ent->post_ent = p_en2; 688fe56b9e6SYuval Mintz 689fe56b9e6SYuval Mintz p_ent = p_en2; 690fe56b9e6SYuval Mintz } 69176a9a364STomer Tayar } 692fe56b9e6SYuval Mintz 693fe56b9e6SYuval Mintz /* entry is to be placed in 'pending' queue */ 694fe56b9e6SYuval Mintz switch (priority) { 695fe56b9e6SYuval Mintz case QED_SPQ_PRIORITY_NORMAL: 696fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->pending); 697fe56b9e6SYuval Mintz p_spq->normal_count++; 698fe56b9e6SYuval Mintz break; 699fe56b9e6SYuval Mintz case QED_SPQ_PRIORITY_HIGH: 700fe56b9e6SYuval Mintz list_add(&p_ent->list, &p_spq->pending); 701fe56b9e6SYuval Mintz p_spq->high_count++; 702fe56b9e6SYuval Mintz break; 703fe56b9e6SYuval Mintz default: 704fe56b9e6SYuval Mintz return -EINVAL; 705fe56b9e6SYuval Mintz } 706fe56b9e6SYuval Mintz 707fe56b9e6SYuval Mintz return 0; 708fe56b9e6SYuval Mintz } 709fe56b9e6SYuval Mintz 710fe56b9e6SYuval Mintz /*************************************************************************** 711fe56b9e6SYuval Mintz * Accessor 712fe56b9e6SYuval Mintz ***************************************************************************/ 713fe56b9e6SYuval Mintz u32 qed_spq_get_cid(struct qed_hwfn *p_hwfn) 714fe56b9e6SYuval Mintz { 715fe56b9e6SYuval Mintz if (!p_hwfn->p_spq) 716fe56b9e6SYuval Mintz return 0xffffffff; /* illegal */ 717fe56b9e6SYuval Mintz return p_hwfn->p_spq->cid; 718fe56b9e6SYuval Mintz } 719fe56b9e6SYuval Mintz 720fe56b9e6SYuval Mintz /*************************************************************************** 721fe56b9e6SYuval Mintz * Posting new Ramrods 722fe56b9e6SYuval Mintz ***************************************************************************/ 723fe56b9e6SYuval Mintz static int qed_spq_post_list(struct qed_hwfn *p_hwfn, 7241a635e48SYuval Mintz struct list_head *head, u32 keep_reserve) 725fe56b9e6SYuval Mintz { 726fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 727fe56b9e6SYuval Mintz int rc; 728fe56b9e6SYuval Mintz 729fe56b9e6SYuval Mintz while (qed_chain_get_elem_left(&p_spq->chain) > keep_reserve && 730fe56b9e6SYuval Mintz !list_empty(head)) { 731fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = 732fe56b9e6SYuval Mintz list_first_entry(head, struct qed_spq_entry, list); 733631e871eSzhong jiang list_move_tail(&p_ent->list, &p_spq->completion_pending); 734fe56b9e6SYuval Mintz p_spq->comp_sent_count++; 735fe56b9e6SYuval Mintz 736fe56b9e6SYuval Mintz rc = qed_spq_hw_post(p_hwfn, p_spq, p_ent); 737fe56b9e6SYuval Mintz if (rc) { 738fe56b9e6SYuval Mintz list_del(&p_ent->list); 739fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 740fe56b9e6SYuval Mintz return rc; 741fe56b9e6SYuval Mintz } 742fe56b9e6SYuval Mintz } 743fe56b9e6SYuval Mintz 744fe56b9e6SYuval Mintz return 0; 745fe56b9e6SYuval Mintz } 746fe56b9e6SYuval Mintz 747fe56b9e6SYuval Mintz static int qed_spq_pend_post(struct qed_hwfn *p_hwfn) 748fe56b9e6SYuval Mintz { 749fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 750fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 751fe56b9e6SYuval Mintz 752fe56b9e6SYuval Mintz while (!list_empty(&p_spq->free_pool)) { 753fe56b9e6SYuval Mintz if (list_empty(&p_spq->unlimited_pending)) 754fe56b9e6SYuval Mintz break; 755fe56b9e6SYuval Mintz 756fe56b9e6SYuval Mintz p_ent = list_first_entry(&p_spq->unlimited_pending, 7571a635e48SYuval Mintz struct qed_spq_entry, list); 758fe56b9e6SYuval Mintz if (!p_ent) 759fe56b9e6SYuval Mintz return -EINVAL; 760fe56b9e6SYuval Mintz 761fe56b9e6SYuval Mintz list_del(&p_ent->list); 762fe56b9e6SYuval Mintz 763fe56b9e6SYuval Mintz qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); 764fe56b9e6SYuval Mintz } 765fe56b9e6SYuval Mintz 766fe56b9e6SYuval Mintz return qed_spq_post_list(p_hwfn, &p_spq->pending, 767fe56b9e6SYuval Mintz SPQ_HIGH_PRI_RESERVE_DEFAULT); 768fe56b9e6SYuval Mintz } 769fe56b9e6SYuval Mintz 7702632f22eSDenis Bolotin /* Avoid overriding of SPQ entries when getting out-of-order completions, by 7712632f22eSDenis Bolotin * marking the completions in a bitmap and increasing the chain consumer only 7722632f22eSDenis Bolotin * for the first successive completed entries. 7732632f22eSDenis Bolotin */ 7742632f22eSDenis Bolotin static void qed_spq_comp_bmap_update(struct qed_hwfn *p_hwfn, __le16 echo) 7752632f22eSDenis Bolotin { 7762632f22eSDenis Bolotin u16 pos = le16_to_cpu(echo) % SPQ_RING_SIZE; 7772632f22eSDenis Bolotin struct qed_spq *p_spq = p_hwfn->p_spq; 7782632f22eSDenis Bolotin 7792632f22eSDenis Bolotin __set_bit(pos, p_spq->p_comp_bitmap); 7802632f22eSDenis Bolotin while (test_bit(p_spq->comp_bitmap_idx, 7812632f22eSDenis Bolotin p_spq->p_comp_bitmap)) { 7822632f22eSDenis Bolotin __clear_bit(p_spq->comp_bitmap_idx, 7832632f22eSDenis Bolotin p_spq->p_comp_bitmap); 7842632f22eSDenis Bolotin p_spq->comp_bitmap_idx++; 7852632f22eSDenis Bolotin qed_chain_return_produced(&p_spq->chain); 7862632f22eSDenis Bolotin } 7872632f22eSDenis Bolotin } 7882632f22eSDenis Bolotin 789fe56b9e6SYuval Mintz int qed_spq_post(struct qed_hwfn *p_hwfn, 7901a635e48SYuval Mintz struct qed_spq_entry *p_ent, u8 *fw_return_code) 791fe56b9e6SYuval Mintz { 792fe56b9e6SYuval Mintz int rc = 0; 793fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn ? p_hwfn->p_spq : NULL; 794fe56b9e6SYuval Mintz bool b_ret_ent = true; 79570eeff66SRoland Dreier bool eblock; 796fe56b9e6SYuval Mintz 797fe56b9e6SYuval Mintz if (!p_hwfn) 798fe56b9e6SYuval Mintz return -EINVAL; 799fe56b9e6SYuval Mintz 800fe56b9e6SYuval Mintz if (!p_ent) { 801fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Got a NULL pointer\n"); 802fe56b9e6SYuval Mintz return -EINVAL; 803fe56b9e6SYuval Mintz } 804fe56b9e6SYuval Mintz 805fe56b9e6SYuval Mintz /* Complete the entry */ 806fe56b9e6SYuval Mintz rc = qed_spq_fill_entry(p_hwfn, p_ent); 807fe56b9e6SYuval Mintz 808fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 809fe56b9e6SYuval Mintz 810fe56b9e6SYuval Mintz /* Check return value after LOCK is taken for cleaner error flow */ 811fe56b9e6SYuval Mintz if (rc) 812fe56b9e6SYuval Mintz goto spq_post_fail; 813fe56b9e6SYuval Mintz 81470eeff66SRoland Dreier /* Check if entry is in block mode before qed_spq_add_entry, 81570eeff66SRoland Dreier * which might kfree p_ent. 81670eeff66SRoland Dreier */ 81770eeff66SRoland Dreier eblock = (p_ent->comp_mode == QED_SPQ_MODE_EBLOCK); 81870eeff66SRoland Dreier 819fe56b9e6SYuval Mintz /* Add the request to the pending queue */ 820fe56b9e6SYuval Mintz rc = qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); 821fe56b9e6SYuval Mintz if (rc) 822fe56b9e6SYuval Mintz goto spq_post_fail; 823fe56b9e6SYuval Mintz 824fe56b9e6SYuval Mintz rc = qed_spq_pend_post(p_hwfn); 825fe56b9e6SYuval Mintz if (rc) { 826fe56b9e6SYuval Mintz /* Since it's possible that pending failed for a different 827fe56b9e6SYuval Mintz * entry [although unlikely], the failed entry was already 828fe56b9e6SYuval Mintz * dealt with; No need to return it here. 829fe56b9e6SYuval Mintz */ 830fe56b9e6SYuval Mintz b_ret_ent = false; 831fe56b9e6SYuval Mintz goto spq_post_fail; 832fe56b9e6SYuval Mintz } 833fe56b9e6SYuval Mintz 834fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 835fe56b9e6SYuval Mintz 83670eeff66SRoland Dreier if (eblock) { 837fe56b9e6SYuval Mintz /* For entries in QED BLOCK mode, the completion code cannot 838fe56b9e6SYuval Mintz * perform the necessary cleanup - if it did, we couldn't 839fe56b9e6SYuval Mintz * access p_ent here to see whether it's successful or not. 840fe56b9e6SYuval Mintz * Thus, after gaining the answer perform the cleanup here. 841fe56b9e6SYuval Mintz */ 842c59f5291SYuval Mintz rc = qed_spq_block(p_hwfn, p_ent, fw_return_code, 843c59f5291SYuval Mintz p_ent->queue == &p_spq->unlimited_pending); 844db511c37SYuval Mintz 845db511c37SYuval Mintz if (p_ent->queue == &p_spq->unlimited_pending) { 8462632f22eSDenis Bolotin struct qed_spq_entry *p_post_ent = p_ent->post_ent; 8472632f22eSDenis Bolotin 848db511c37SYuval Mintz kfree(p_ent); 8492632f22eSDenis Bolotin 8502632f22eSDenis Bolotin /* Return the entry which was actually posted */ 8512632f22eSDenis Bolotin p_ent = p_post_ent; 852db511c37SYuval Mintz } 853db511c37SYuval Mintz 854fe56b9e6SYuval Mintz if (rc) 855fe56b9e6SYuval Mintz goto spq_post_fail2; 856fe56b9e6SYuval Mintz 857fe56b9e6SYuval Mintz /* return to pool */ 858fe56b9e6SYuval Mintz qed_spq_return_entry(p_hwfn, p_ent); 859fe56b9e6SYuval Mintz } 860fe56b9e6SYuval Mintz return rc; 861fe56b9e6SYuval Mintz 862fe56b9e6SYuval Mintz spq_post_fail2: 863fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 864fe56b9e6SYuval Mintz list_del(&p_ent->list); 8652632f22eSDenis Bolotin qed_spq_comp_bmap_update(p_hwfn, p_ent->elem.hdr.echo); 866fe56b9e6SYuval Mintz 867fe56b9e6SYuval Mintz spq_post_fail: 868fe56b9e6SYuval Mintz /* return to the free pool */ 869fe56b9e6SYuval Mintz if (b_ret_ent) 870fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 871fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 872fe56b9e6SYuval Mintz 873fe56b9e6SYuval Mintz return rc; 874fe56b9e6SYuval Mintz } 875fe56b9e6SYuval Mintz 876fe56b9e6SYuval Mintz int qed_spq_completion(struct qed_hwfn *p_hwfn, 877fe56b9e6SYuval Mintz __le16 echo, 878fe56b9e6SYuval Mintz u8 fw_return_code, 879fe56b9e6SYuval Mintz union event_ring_data *p_data) 880fe56b9e6SYuval Mintz { 881fe56b9e6SYuval Mintz struct qed_spq *p_spq; 882fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 883fe56b9e6SYuval Mintz struct qed_spq_entry *tmp; 884fe56b9e6SYuval Mintz struct qed_spq_entry *found = NULL; 885fe56b9e6SYuval Mintz int rc; 886fe56b9e6SYuval Mintz 887fe56b9e6SYuval Mintz if (!p_hwfn) 888fe56b9e6SYuval Mintz return -EINVAL; 889fe56b9e6SYuval Mintz 890fe56b9e6SYuval Mintz p_spq = p_hwfn->p_spq; 891fe56b9e6SYuval Mintz if (!p_spq) 892fe56b9e6SYuval Mintz return -EINVAL; 893fe56b9e6SYuval Mintz 894fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 8951a635e48SYuval Mintz list_for_each_entry_safe(p_ent, tmp, &p_spq->completion_pending, list) { 896fe56b9e6SYuval Mintz if (p_ent->elem.hdr.echo == echo) { 897fe56b9e6SYuval Mintz list_del(&p_ent->list); 8982632f22eSDenis Bolotin qed_spq_comp_bmap_update(p_hwfn, echo); 899fe56b9e6SYuval Mintz p_spq->comp_count++; 900fe56b9e6SYuval Mintz found = p_ent; 901fe56b9e6SYuval Mintz break; 902fe56b9e6SYuval Mintz } 90376a9a364STomer Tayar 90476a9a364STomer Tayar /* This is relatively uncommon - depends on scenarios 90576a9a364STomer Tayar * which have mutliple per-PF sent ramrods. 90676a9a364STomer Tayar */ 90776a9a364STomer Tayar DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 90876a9a364STomer Tayar "Got completion for echo %04x - doesn't match echo %04x in completion pending list\n", 90976a9a364STomer Tayar le16_to_cpu(echo), 91076a9a364STomer Tayar le16_to_cpu(p_ent->elem.hdr.echo)); 911fe56b9e6SYuval Mintz } 912fe56b9e6SYuval Mintz 913fe56b9e6SYuval Mintz /* Release lock before callback, as callback may post 914fe56b9e6SYuval Mintz * an additional ramrod. 915fe56b9e6SYuval Mintz */ 916fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 917fe56b9e6SYuval Mintz 918fe56b9e6SYuval Mintz if (!found) { 919fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, 920525ef5c0SYuval Mintz "Failed to find an entry this EQE [echo %04x] completes\n", 921525ef5c0SYuval Mintz le16_to_cpu(echo)); 922fe56b9e6SYuval Mintz return -EEXIST; 923fe56b9e6SYuval Mintz } 924fe56b9e6SYuval Mintz 925525ef5c0SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 926525ef5c0SYuval Mintz "Complete EQE [echo %04x]: func %p cookie %p)\n", 927525ef5c0SYuval Mintz le16_to_cpu(echo), 928fe56b9e6SYuval Mintz p_ent->comp_cb.function, p_ent->comp_cb.cookie); 929fe56b9e6SYuval Mintz if (found->comp_cb.function) 930fe56b9e6SYuval Mintz found->comp_cb.function(p_hwfn, found->comp_cb.cookie, p_data, 931fe56b9e6SYuval Mintz fw_return_code); 932525ef5c0SYuval Mintz else 933525ef5c0SYuval Mintz DP_VERBOSE(p_hwfn, 934525ef5c0SYuval Mintz QED_MSG_SPQ, 935525ef5c0SYuval Mintz "Got a completion without a callback function\n"); 936fe56b9e6SYuval Mintz 9372632f22eSDenis Bolotin if (found->comp_mode != QED_SPQ_MODE_EBLOCK) 938db511c37SYuval Mintz /* EBLOCK is responsible for returning its own entry into the 9392632f22eSDenis Bolotin * free list. 940db511c37SYuval Mintz */ 941fe56b9e6SYuval Mintz qed_spq_return_entry(p_hwfn, found); 942fe56b9e6SYuval Mintz 943fe56b9e6SYuval Mintz /* Attempt to post pending requests */ 944fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 945fe56b9e6SYuval Mintz rc = qed_spq_pend_post(p_hwfn); 946fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 947fe56b9e6SYuval Mintz 948fe56b9e6SYuval Mintz return rc; 949fe56b9e6SYuval Mintz } 950fe56b9e6SYuval Mintz 9513587cb87STomer Tayar int qed_consq_alloc(struct qed_hwfn *p_hwfn) 952fe56b9e6SYuval Mintz { 953fe56b9e6SYuval Mintz struct qed_consq *p_consq; 954fe56b9e6SYuval Mintz 955fe56b9e6SYuval Mintz /* Allocate ConsQ struct */ 95660fffb3bSYuval Mintz p_consq = kzalloc(sizeof(*p_consq), GFP_KERNEL); 9572591c280SJoe Perches if (!p_consq) 9583587cb87STomer Tayar return -ENOMEM; 959fe56b9e6SYuval Mintz 960fe56b9e6SYuval Mintz /* Allocate and initialize EQ chain*/ 961fe56b9e6SYuval Mintz if (qed_chain_alloc(p_hwfn->cdev, 962fe56b9e6SYuval Mintz QED_CHAIN_USE_TO_PRODUCE, 963fe56b9e6SYuval Mintz QED_CHAIN_MODE_PBL, 964a91eb52aSYuval Mintz QED_CHAIN_CNT_TYPE_U16, 965fe56b9e6SYuval Mintz QED_CHAIN_PAGE_SIZE / 0x80, 9661a4a6975SMintz, Yuval 0x80, &p_consq->chain, NULL)) 967fe56b9e6SYuval Mintz goto consq_allocate_fail; 968fe56b9e6SYuval Mintz 9693587cb87STomer Tayar p_hwfn->p_consq = p_consq; 9703587cb87STomer Tayar return 0; 971fe56b9e6SYuval Mintz 972fe56b9e6SYuval Mintz consq_allocate_fail: 973fe56b9e6SYuval Mintz kfree(p_consq); 9743587cb87STomer Tayar return -ENOMEM; 9753587cb87STomer Tayar } 9763587cb87STomer Tayar 9773587cb87STomer Tayar void qed_consq_setup(struct qed_hwfn *p_hwfn) 9783587cb87STomer Tayar { 9793587cb87STomer Tayar qed_chain_reset(&p_hwfn->p_consq->chain); 9803587cb87STomer Tayar } 9813587cb87STomer Tayar 9823587cb87STomer Tayar void qed_consq_free(struct qed_hwfn *p_hwfn) 9833587cb87STomer Tayar { 9843587cb87STomer Tayar if (!p_hwfn->p_consq) 9853587cb87STomer Tayar return; 9863587cb87STomer Tayar 9873587cb87STomer Tayar qed_chain_free(p_hwfn->cdev, &p_hwfn->p_consq->chain); 9883587cb87STomer Tayar 9893587cb87STomer Tayar kfree(p_hwfn->p_consq); 9903587cb87STomer Tayar p_hwfn->p_consq = NULL; 991fe56b9e6SYuval Mintz } 992