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; 2559ecd8c3fSAriel Elior struct core_db_data *p_db_data = &p_spq->db_data; 25676a9a364STomer Tayar u16 echo = qed_chain_get_prod_idx(p_chain); 257fe56b9e6SYuval Mintz struct slow_path_element *elem; 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 */ 2699ecd8c3fSAriel Elior p_db_data->spq_prod = cpu_to_le16(qed_chain_get_prod_idx(p_chain)); 270fe56b9e6SYuval Mintz 27134c7bb47SSudarsana Reddy Kalluru /* make sure the SPQE is updated before the doorbell */ 27234c7bb47SSudarsana Reddy Kalluru wmb(); 273fe56b9e6SYuval Mintz 2749ecd8c3fSAriel Elior DOORBELL(p_hwfn, p_spq->db_addr_offset, *(u32 *)p_db_data); 275fe56b9e6SYuval Mintz 276fe56b9e6SYuval Mintz /* make sure doorbell is rang */ 27734c7bb47SSudarsana Reddy Kalluru wmb(); 278fe56b9e6SYuval Mintz 279fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 280fe56b9e6SYuval Mintz "Doorbelled [0x%08x, CID 0x%08x] with Flags: %02x agg_params: %02x, prod: %04x\n", 2819ecd8c3fSAriel Elior p_spq->db_addr_offset, 2829ecd8c3fSAriel Elior p_spq->cid, 2839ecd8c3fSAriel Elior p_db_data->params, 2849ecd8c3fSAriel Elior p_db_data->agg_flags, qed_chain_get_prod_idx(p_chain)); 285fe56b9e6SYuval Mintz 286fe56b9e6SYuval Mintz return 0; 287fe56b9e6SYuval Mintz } 288fe56b9e6SYuval Mintz 289fe56b9e6SYuval Mintz /*************************************************************************** 290fe56b9e6SYuval Mintz * Asynchronous events 291fe56b9e6SYuval Mintz ***************************************************************************/ 292fe56b9e6SYuval Mintz static int 293fe56b9e6SYuval Mintz qed_async_event_completion(struct qed_hwfn *p_hwfn, 294fe56b9e6SYuval Mintz struct event_ring_entry *p_eqe) 295fe56b9e6SYuval Mintz { 2966c9e80eaSMichal Kalderon qed_spq_async_comp_cb cb; 2976c9e80eaSMichal Kalderon 2986c9e80eaSMichal Kalderon if (!p_hwfn->p_spq || (p_eqe->protocol_id >= MAX_PROTOCOL_TYPE)) 299fc831825SYuval Mintz return -EINVAL; 300fc831825SYuval Mintz 3016c9e80eaSMichal Kalderon cb = p_hwfn->p_spq->async_comp_cb[p_eqe->protocol_id]; 3026c9e80eaSMichal Kalderon if (cb) { 3036c9e80eaSMichal Kalderon return cb(p_hwfn, p_eqe->opcode, p_eqe->echo, 3046c9e80eaSMichal Kalderon &p_eqe->data, p_eqe->fw_return_code); 305fc831825SYuval Mintz } else { 306fc831825SYuval Mintz DP_NOTICE(p_hwfn, 307fe56b9e6SYuval Mintz "Unknown Async completion for protocol: %d\n", 308fe56b9e6SYuval Mintz p_eqe->protocol_id); 309fe56b9e6SYuval Mintz return -EINVAL; 310fe56b9e6SYuval Mintz } 31137bff2b9SYuval Mintz } 312fe56b9e6SYuval Mintz 3136c9e80eaSMichal Kalderon int 3146c9e80eaSMichal Kalderon qed_spq_register_async_cb(struct qed_hwfn *p_hwfn, 3156c9e80eaSMichal Kalderon enum protocol_type protocol_id, 3166c9e80eaSMichal Kalderon qed_spq_async_comp_cb cb) 3176c9e80eaSMichal Kalderon { 3186c9e80eaSMichal Kalderon if (!p_hwfn->p_spq || (protocol_id >= MAX_PROTOCOL_TYPE)) 3196c9e80eaSMichal Kalderon return -EINVAL; 3206c9e80eaSMichal Kalderon 3216c9e80eaSMichal Kalderon p_hwfn->p_spq->async_comp_cb[protocol_id] = cb; 3226c9e80eaSMichal Kalderon return 0; 3236c9e80eaSMichal Kalderon } 3246c9e80eaSMichal Kalderon 3256c9e80eaSMichal Kalderon void 3266c9e80eaSMichal Kalderon qed_spq_unregister_async_cb(struct qed_hwfn *p_hwfn, 3276c9e80eaSMichal Kalderon enum protocol_type protocol_id) 3286c9e80eaSMichal Kalderon { 3296c9e80eaSMichal Kalderon if (!p_hwfn->p_spq || (protocol_id >= MAX_PROTOCOL_TYPE)) 3306c9e80eaSMichal Kalderon return; 3316c9e80eaSMichal Kalderon 3326c9e80eaSMichal Kalderon p_hwfn->p_spq->async_comp_cb[protocol_id] = NULL; 3336c9e80eaSMichal Kalderon } 3346c9e80eaSMichal Kalderon 335fe56b9e6SYuval Mintz /*************************************************************************** 336fe56b9e6SYuval Mintz * EQ API 337fe56b9e6SYuval Mintz ***************************************************************************/ 3381a635e48SYuval Mintz void qed_eq_prod_update(struct qed_hwfn *p_hwfn, u16 prod) 339fe56b9e6SYuval Mintz { 340fe56b9e6SYuval Mintz u32 addr = GTT_BAR0_MAP_REG_USDM_RAM + 341fe56b9e6SYuval Mintz USTORM_EQE_CONS_OFFSET(p_hwfn->rel_pf_id); 342fe56b9e6SYuval Mintz 343fe56b9e6SYuval Mintz REG_WR16(p_hwfn, addr, prod); 344fe56b9e6SYuval Mintz 345fe56b9e6SYuval Mintz /* keep prod updates ordered */ 346fe56b9e6SYuval Mintz mmiowb(); 347fe56b9e6SYuval Mintz } 348fe56b9e6SYuval Mintz 3491a635e48SYuval Mintz int qed_eq_completion(struct qed_hwfn *p_hwfn, void *cookie) 350fe56b9e6SYuval Mintz { 351fe56b9e6SYuval Mintz struct qed_eq *p_eq = cookie; 352fe56b9e6SYuval Mintz struct qed_chain *p_chain = &p_eq->chain; 353fe56b9e6SYuval Mintz int rc = 0; 354fe56b9e6SYuval Mintz 355fe56b9e6SYuval Mintz /* take a snapshot of the FW consumer */ 356fe56b9e6SYuval Mintz u16 fw_cons_idx = le16_to_cpu(*p_eq->p_fw_cons); 357fe56b9e6SYuval Mintz 358fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, "fw_cons_idx %x\n", fw_cons_idx); 359fe56b9e6SYuval Mintz 360fe56b9e6SYuval Mintz /* Need to guarantee the fw_cons index we use points to a usuable 361fe56b9e6SYuval Mintz * element (to comply with our chain), so our macros would comply 362fe56b9e6SYuval Mintz */ 363fe56b9e6SYuval Mintz if ((fw_cons_idx & qed_chain_get_usable_per_page(p_chain)) == 364fe56b9e6SYuval Mintz qed_chain_get_usable_per_page(p_chain)) 365fe56b9e6SYuval Mintz fw_cons_idx += qed_chain_get_unusable_per_page(p_chain); 366fe56b9e6SYuval Mintz 367fe56b9e6SYuval Mintz /* Complete current segment of eq entries */ 368fe56b9e6SYuval Mintz while (fw_cons_idx != qed_chain_get_cons_idx(p_chain)) { 369fe56b9e6SYuval Mintz struct event_ring_entry *p_eqe = qed_chain_consume(p_chain); 370fe56b9e6SYuval Mintz 371fe56b9e6SYuval Mintz if (!p_eqe) { 372fe56b9e6SYuval Mintz rc = -EINVAL; 373fe56b9e6SYuval Mintz break; 374fe56b9e6SYuval Mintz } 375fe56b9e6SYuval Mintz 376fe56b9e6SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 377fe56b9e6SYuval Mintz "op %x prot %x res0 %x echo %x fwret %x flags %x\n", 378fe56b9e6SYuval Mintz p_eqe->opcode, 379fe56b9e6SYuval Mintz p_eqe->protocol_id, 380fe56b9e6SYuval Mintz p_eqe->reserved0, 381fe56b9e6SYuval Mintz le16_to_cpu(p_eqe->echo), 382fe56b9e6SYuval Mintz p_eqe->fw_return_code, 383fe56b9e6SYuval Mintz p_eqe->flags); 384fe56b9e6SYuval Mintz 385fe56b9e6SYuval Mintz if (GET_FIELD(p_eqe->flags, EVENT_RING_ENTRY_ASYNC)) { 386fe56b9e6SYuval Mintz if (qed_async_event_completion(p_hwfn, p_eqe)) 387fe56b9e6SYuval Mintz rc = -EINVAL; 388fe56b9e6SYuval Mintz } else if (qed_spq_completion(p_hwfn, 389fe56b9e6SYuval Mintz p_eqe->echo, 390fe56b9e6SYuval Mintz p_eqe->fw_return_code, 391fe56b9e6SYuval Mintz &p_eqe->data)) { 392fe56b9e6SYuval Mintz rc = -EINVAL; 393fe56b9e6SYuval Mintz } 394fe56b9e6SYuval Mintz 395fe56b9e6SYuval Mintz qed_chain_recycle_consumed(p_chain); 396fe56b9e6SYuval Mintz } 397fe56b9e6SYuval Mintz 398fe56b9e6SYuval Mintz qed_eq_prod_update(p_hwfn, qed_chain_get_prod_idx(p_chain)); 399fe56b9e6SYuval Mintz 400660492bcSManish Chopra /* Attempt to post pending requests */ 401660492bcSManish Chopra spin_lock_bh(&p_hwfn->p_spq->lock); 402660492bcSManish Chopra rc = qed_spq_pend_post(p_hwfn); 403660492bcSManish Chopra spin_unlock_bh(&p_hwfn->p_spq->lock); 404660492bcSManish Chopra 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; 4939ecd8c3fSAriel Elior struct core_db_data *p_db_data; 4949ecd8c3fSAriel Elior void __iomem *db_addr; 495fe56b9e6SYuval Mintz dma_addr_t p_phys = 0; 496a91eb52aSYuval Mintz u32 i, capacity; 4979ecd8c3fSAriel Elior int rc; 498fe56b9e6SYuval Mintz 499fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->pending); 500fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->completion_pending); 501fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->free_pool); 502fe56b9e6SYuval Mintz INIT_LIST_HEAD(&p_spq->unlimited_pending); 503fe56b9e6SYuval Mintz spin_lock_init(&p_spq->lock); 504fe56b9e6SYuval Mintz 505fe56b9e6SYuval Mintz /* SPQ empty pool */ 506fe56b9e6SYuval Mintz p_phys = p_spq->p_phys + offsetof(struct qed_spq_entry, ramrod); 507fe56b9e6SYuval Mintz p_virt = p_spq->p_virt; 508fe56b9e6SYuval Mintz 509a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 510a91eb52aSYuval Mintz for (i = 0; i < capacity; i++) { 51194494598SYuval Mintz DMA_REGPAIR_LE(p_virt->elem.data_ptr, p_phys); 512fe56b9e6SYuval Mintz 513fe56b9e6SYuval Mintz list_add_tail(&p_virt->list, &p_spq->free_pool); 514fe56b9e6SYuval Mintz 515fe56b9e6SYuval Mintz p_virt++; 516fe56b9e6SYuval Mintz p_phys += sizeof(struct qed_spq_entry); 517fe56b9e6SYuval Mintz } 518fe56b9e6SYuval Mintz 519fe56b9e6SYuval Mintz /* Statistics */ 520fe56b9e6SYuval Mintz p_spq->normal_count = 0; 521fe56b9e6SYuval Mintz p_spq->comp_count = 0; 522fe56b9e6SYuval Mintz p_spq->comp_sent_count = 0; 523fe56b9e6SYuval Mintz p_spq->unlimited_pending_count = 0; 52476a9a364STomer Tayar 52576a9a364STomer Tayar bitmap_zero(p_spq->p_comp_bitmap, SPQ_RING_SIZE); 52676a9a364STomer Tayar p_spq->comp_bitmap_idx = 0; 527fe56b9e6SYuval Mintz 528fe56b9e6SYuval Mintz /* SPQ cid, cannot fail */ 529fe56b9e6SYuval Mintz qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_spq->cid); 530fe56b9e6SYuval Mintz qed_spq_hw_initialize(p_hwfn, p_spq); 531fe56b9e6SYuval Mintz 532fe56b9e6SYuval Mintz /* reset the chain itself */ 533fe56b9e6SYuval Mintz qed_chain_reset(&p_spq->chain); 5349ecd8c3fSAriel Elior 5359ecd8c3fSAriel Elior /* Initialize the address/data of the SPQ doorbell */ 5369ecd8c3fSAriel Elior p_spq->db_addr_offset = qed_db_addr(p_spq->cid, DQ_DEMS_LEGACY); 5379ecd8c3fSAriel Elior p_db_data = &p_spq->db_data; 5389ecd8c3fSAriel Elior memset(p_db_data, 0, sizeof(*p_db_data)); 5399ecd8c3fSAriel Elior SET_FIELD(p_db_data->params, CORE_DB_DATA_DEST, DB_DEST_XCM); 5409ecd8c3fSAriel Elior SET_FIELD(p_db_data->params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_MAX); 5419ecd8c3fSAriel Elior SET_FIELD(p_db_data->params, CORE_DB_DATA_AGG_VAL_SEL, 5429ecd8c3fSAriel Elior DQ_XCM_CORE_SPQ_PROD_CMD); 5439ecd8c3fSAriel Elior p_db_data->agg_flags = DQ_XCM_CORE_DQ_CF_CMD; 5449ecd8c3fSAriel Elior 5459ecd8c3fSAriel Elior /* Register the SPQ doorbell with the doorbell recovery mechanism */ 5469ecd8c3fSAriel Elior db_addr = (void __iomem *)((u8 __iomem *)p_hwfn->doorbells + 5479ecd8c3fSAriel Elior p_spq->db_addr_offset); 5489ecd8c3fSAriel Elior rc = qed_db_recovery_add(p_hwfn->cdev, db_addr, &p_spq->db_data, 5499ecd8c3fSAriel Elior DB_REC_WIDTH_32B, DB_REC_KERNEL); 5509ecd8c3fSAriel Elior if (rc) 5519ecd8c3fSAriel Elior DP_INFO(p_hwfn, 5529ecd8c3fSAriel Elior "Failed to register the SPQ doorbell with the doorbell recovery mechanism\n"); 553fe56b9e6SYuval Mintz } 554fe56b9e6SYuval Mintz 555fe56b9e6SYuval Mintz int qed_spq_alloc(struct qed_hwfn *p_hwfn) 556fe56b9e6SYuval Mintz { 557a91eb52aSYuval Mintz struct qed_spq_entry *p_virt = NULL; 558fe56b9e6SYuval Mintz struct qed_spq *p_spq = NULL; 559fe56b9e6SYuval Mintz dma_addr_t p_phys = 0; 560a91eb52aSYuval Mintz u32 capacity; 561fe56b9e6SYuval Mintz 562fe56b9e6SYuval Mintz /* SPQ struct */ 5631a635e48SYuval Mintz p_spq = kzalloc(sizeof(struct qed_spq), GFP_KERNEL); 5642591c280SJoe Perches if (!p_spq) 565fe56b9e6SYuval Mintz return -ENOMEM; 566fe56b9e6SYuval Mintz 567fe56b9e6SYuval Mintz /* SPQ ring */ 568fe56b9e6SYuval Mintz if (qed_chain_alloc(p_hwfn->cdev, 569fe56b9e6SYuval Mintz QED_CHAIN_USE_TO_PRODUCE, 570fe56b9e6SYuval Mintz QED_CHAIN_MODE_SINGLE, 571a91eb52aSYuval Mintz QED_CHAIN_CNT_TYPE_U16, 572fe56b9e6SYuval Mintz 0, /* N/A when the mode is SINGLE */ 573fe56b9e6SYuval Mintz sizeof(struct slow_path_element), 5741a4a6975SMintz, Yuval &p_spq->chain, NULL)) 575fe56b9e6SYuval Mintz goto spq_allocate_fail; 576fe56b9e6SYuval Mintz 577fe56b9e6SYuval Mintz /* allocate and fill the SPQ elements (incl. ramrod data list) */ 578a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 579fe56b9e6SYuval Mintz p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev, 5802591c280SJoe Perches capacity * sizeof(struct qed_spq_entry), 581a91eb52aSYuval Mintz &p_phys, GFP_KERNEL); 582fe56b9e6SYuval Mintz if (!p_virt) 583fe56b9e6SYuval Mintz goto spq_allocate_fail; 584fe56b9e6SYuval Mintz 585fe56b9e6SYuval Mintz p_spq->p_virt = p_virt; 586fe56b9e6SYuval Mintz p_spq->p_phys = p_phys; 587fe56b9e6SYuval Mintz p_hwfn->p_spq = p_spq; 588fe56b9e6SYuval Mintz 589fe56b9e6SYuval Mintz return 0; 590fe56b9e6SYuval Mintz 591fe56b9e6SYuval Mintz spq_allocate_fail: 592fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_spq->chain); 593fe56b9e6SYuval Mintz kfree(p_spq); 594fe56b9e6SYuval Mintz return -ENOMEM; 595fe56b9e6SYuval Mintz } 596fe56b9e6SYuval Mintz 597fe56b9e6SYuval Mintz void qed_spq_free(struct qed_hwfn *p_hwfn) 598fe56b9e6SYuval Mintz { 599fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 6009ecd8c3fSAriel Elior void __iomem *db_addr; 601a91eb52aSYuval Mintz u32 capacity; 602fe56b9e6SYuval Mintz 603fe56b9e6SYuval Mintz if (!p_spq) 604fe56b9e6SYuval Mintz return; 605fe56b9e6SYuval Mintz 6069ecd8c3fSAriel Elior /* Delete the SPQ doorbell from the doorbell recovery mechanism */ 6079ecd8c3fSAriel Elior db_addr = (void __iomem *)((u8 __iomem *)p_hwfn->doorbells + 6089ecd8c3fSAriel Elior p_spq->db_addr_offset); 6099ecd8c3fSAriel Elior qed_db_recovery_del(p_hwfn->cdev, db_addr, &p_spq->db_data); 6109ecd8c3fSAriel Elior 611a91eb52aSYuval Mintz if (p_spq->p_virt) { 612a91eb52aSYuval Mintz capacity = qed_chain_get_capacity(&p_spq->chain); 613fe56b9e6SYuval Mintz dma_free_coherent(&p_hwfn->cdev->pdev->dev, 614a91eb52aSYuval Mintz capacity * 615fe56b9e6SYuval Mintz sizeof(struct qed_spq_entry), 616a91eb52aSYuval Mintz p_spq->p_virt, p_spq->p_phys); 617a91eb52aSYuval Mintz } 618fe56b9e6SYuval Mintz 619fe56b9e6SYuval Mintz qed_chain_free(p_hwfn->cdev, &p_spq->chain); 620fe56b9e6SYuval Mintz kfree(p_spq); 6213587cb87STomer Tayar p_hwfn->p_spq = NULL; 622fe56b9e6SYuval Mintz } 623fe56b9e6SYuval Mintz 6241a635e48SYuval Mintz int qed_spq_get_entry(struct qed_hwfn *p_hwfn, struct qed_spq_entry **pp_ent) 625fe56b9e6SYuval Mintz { 626fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 627fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 628fe56b9e6SYuval Mintz int rc = 0; 629fe56b9e6SYuval Mintz 630fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 631fe56b9e6SYuval Mintz 632fe56b9e6SYuval Mintz if (list_empty(&p_spq->free_pool)) { 633fe56b9e6SYuval Mintz p_ent = kzalloc(sizeof(*p_ent), GFP_ATOMIC); 634fe56b9e6SYuval Mintz if (!p_ent) { 6351a635e48SYuval Mintz DP_NOTICE(p_hwfn, 6361a635e48SYuval Mintz "Failed to allocate an SPQ entry for a pending ramrod\n"); 637fe56b9e6SYuval Mintz rc = -ENOMEM; 638fe56b9e6SYuval Mintz goto out_unlock; 639fe56b9e6SYuval Mintz } 640fe56b9e6SYuval Mintz p_ent->queue = &p_spq->unlimited_pending; 641fe56b9e6SYuval Mintz } else { 642fe56b9e6SYuval Mintz p_ent = list_first_entry(&p_spq->free_pool, 6431a635e48SYuval Mintz struct qed_spq_entry, list); 644fe56b9e6SYuval Mintz list_del(&p_ent->list); 645fe56b9e6SYuval Mintz p_ent->queue = &p_spq->pending; 646fe56b9e6SYuval Mintz } 647fe56b9e6SYuval Mintz 648fe56b9e6SYuval Mintz *pp_ent = p_ent; 649fe56b9e6SYuval Mintz 650fe56b9e6SYuval Mintz out_unlock: 651fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 652fe56b9e6SYuval Mintz return rc; 653fe56b9e6SYuval Mintz } 654fe56b9e6SYuval Mintz 655fe56b9e6SYuval Mintz /* Locked variant; Should be called while the SPQ lock is taken */ 656fe56b9e6SYuval Mintz static void __qed_spq_return_entry(struct qed_hwfn *p_hwfn, 657fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent) 658fe56b9e6SYuval Mintz { 659fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_hwfn->p_spq->free_pool); 660fe56b9e6SYuval Mintz } 661fe56b9e6SYuval Mintz 6621a635e48SYuval Mintz void qed_spq_return_entry(struct qed_hwfn *p_hwfn, struct qed_spq_entry *p_ent) 663fe56b9e6SYuval Mintz { 664fe56b9e6SYuval Mintz spin_lock_bh(&p_hwfn->p_spq->lock); 665fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 666fe56b9e6SYuval Mintz spin_unlock_bh(&p_hwfn->p_spq->lock); 667fe56b9e6SYuval Mintz } 668fe56b9e6SYuval Mintz 669fe56b9e6SYuval Mintz /** 670fe56b9e6SYuval Mintz * @brief qed_spq_add_entry - adds a new entry to the pending 671fe56b9e6SYuval Mintz * list. Should be used while lock is being held. 672fe56b9e6SYuval Mintz * 673fe56b9e6SYuval Mintz * Addes an entry to the pending list is there is room (en empty 674fe56b9e6SYuval Mintz * element is available in the free_pool), or else places the 675fe56b9e6SYuval Mintz * entry in the unlimited_pending pool. 676fe56b9e6SYuval Mintz * 677fe56b9e6SYuval Mintz * @param p_hwfn 678fe56b9e6SYuval Mintz * @param p_ent 679fe56b9e6SYuval Mintz * @param priority 680fe56b9e6SYuval Mintz * 681fe56b9e6SYuval Mintz * @return int 682fe56b9e6SYuval Mintz */ 6831a635e48SYuval Mintz static int qed_spq_add_entry(struct qed_hwfn *p_hwfn, 684fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent, 685fe56b9e6SYuval Mintz enum spq_priority priority) 686fe56b9e6SYuval Mintz { 687fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 688fe56b9e6SYuval Mintz 689fe56b9e6SYuval Mintz if (p_ent->queue == &p_spq->unlimited_pending) { 690fe56b9e6SYuval Mintz 691fe56b9e6SYuval Mintz if (list_empty(&p_spq->free_pool)) { 692fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->unlimited_pending); 693fe56b9e6SYuval Mintz p_spq->unlimited_pending_count++; 694fe56b9e6SYuval Mintz 695fe56b9e6SYuval Mintz return 0; 69676a9a364STomer Tayar } else { 69776a9a364STomer Tayar struct qed_spq_entry *p_en2; 698fe56b9e6SYuval Mintz 699fe56b9e6SYuval Mintz p_en2 = list_first_entry(&p_spq->free_pool, 7001a635e48SYuval Mintz struct qed_spq_entry, list); 701fe56b9e6SYuval Mintz list_del(&p_en2->list); 702fe56b9e6SYuval Mintz 70376a9a364STomer Tayar /* Copy the ring element physical pointer to the new 70476a9a364STomer Tayar * entry, since we are about to override the entire ring 70576a9a364STomer Tayar * entry and don't want to lose the pointer. 70676a9a364STomer Tayar */ 70776a9a364STomer Tayar p_ent->elem.data_ptr = p_en2->elem.data_ptr; 70876a9a364STomer Tayar 709fe56b9e6SYuval Mintz *p_en2 = *p_ent; 710fe56b9e6SYuval Mintz 711db511c37SYuval Mintz /* EBLOCK responsible to free the allocated p_ent */ 712db511c37SYuval Mintz if (p_ent->comp_mode != QED_SPQ_MODE_EBLOCK) 713fe56b9e6SYuval Mintz kfree(p_ent); 7142632f22eSDenis Bolotin else 7152632f22eSDenis Bolotin p_ent->post_ent = p_en2; 716fe56b9e6SYuval Mintz 717fe56b9e6SYuval Mintz p_ent = p_en2; 718fe56b9e6SYuval Mintz } 71976a9a364STomer Tayar } 720fe56b9e6SYuval Mintz 721fe56b9e6SYuval Mintz /* entry is to be placed in 'pending' queue */ 722fe56b9e6SYuval Mintz switch (priority) { 723fe56b9e6SYuval Mintz case QED_SPQ_PRIORITY_NORMAL: 724fe56b9e6SYuval Mintz list_add_tail(&p_ent->list, &p_spq->pending); 725fe56b9e6SYuval Mintz p_spq->normal_count++; 726fe56b9e6SYuval Mintz break; 727fe56b9e6SYuval Mintz case QED_SPQ_PRIORITY_HIGH: 728fe56b9e6SYuval Mintz list_add(&p_ent->list, &p_spq->pending); 729fe56b9e6SYuval Mintz p_spq->high_count++; 730fe56b9e6SYuval Mintz break; 731fe56b9e6SYuval Mintz default: 732fe56b9e6SYuval Mintz return -EINVAL; 733fe56b9e6SYuval Mintz } 734fe56b9e6SYuval Mintz 735fe56b9e6SYuval Mintz return 0; 736fe56b9e6SYuval Mintz } 737fe56b9e6SYuval Mintz 738fe56b9e6SYuval Mintz /*************************************************************************** 739fe56b9e6SYuval Mintz * Accessor 740fe56b9e6SYuval Mintz ***************************************************************************/ 741fe56b9e6SYuval Mintz u32 qed_spq_get_cid(struct qed_hwfn *p_hwfn) 742fe56b9e6SYuval Mintz { 743fe56b9e6SYuval Mintz if (!p_hwfn->p_spq) 744fe56b9e6SYuval Mintz return 0xffffffff; /* illegal */ 745fe56b9e6SYuval Mintz return p_hwfn->p_spq->cid; 746fe56b9e6SYuval Mintz } 747fe56b9e6SYuval Mintz 748fe56b9e6SYuval Mintz /*************************************************************************** 749fe56b9e6SYuval Mintz * Posting new Ramrods 750fe56b9e6SYuval Mintz ***************************************************************************/ 751fe56b9e6SYuval Mintz static int qed_spq_post_list(struct qed_hwfn *p_hwfn, 7521a635e48SYuval Mintz struct list_head *head, u32 keep_reserve) 753fe56b9e6SYuval Mintz { 754fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 755fe56b9e6SYuval Mintz int rc; 756fe56b9e6SYuval Mintz 757fe56b9e6SYuval Mintz while (qed_chain_get_elem_left(&p_spq->chain) > keep_reserve && 758fe56b9e6SYuval Mintz !list_empty(head)) { 759fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = 760fe56b9e6SYuval Mintz list_first_entry(head, struct qed_spq_entry, list); 761631e871eSzhong jiang list_move_tail(&p_ent->list, &p_spq->completion_pending); 762fe56b9e6SYuval Mintz p_spq->comp_sent_count++; 763fe56b9e6SYuval Mintz 764fe56b9e6SYuval Mintz rc = qed_spq_hw_post(p_hwfn, p_spq, p_ent); 765fe56b9e6SYuval Mintz if (rc) { 766fe56b9e6SYuval Mintz list_del(&p_ent->list); 767fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 768fe56b9e6SYuval Mintz return rc; 769fe56b9e6SYuval Mintz } 770fe56b9e6SYuval Mintz } 771fe56b9e6SYuval Mintz 772fe56b9e6SYuval Mintz return 0; 773fe56b9e6SYuval Mintz } 774fe56b9e6SYuval Mintz 775660492bcSManish Chopra int qed_spq_pend_post(struct qed_hwfn *p_hwfn) 776fe56b9e6SYuval Mintz { 777fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn->p_spq; 778fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 779fe56b9e6SYuval Mintz 780fe56b9e6SYuval Mintz while (!list_empty(&p_spq->free_pool)) { 781fe56b9e6SYuval Mintz if (list_empty(&p_spq->unlimited_pending)) 782fe56b9e6SYuval Mintz break; 783fe56b9e6SYuval Mintz 784fe56b9e6SYuval Mintz p_ent = list_first_entry(&p_spq->unlimited_pending, 7851a635e48SYuval Mintz struct qed_spq_entry, list); 786fe56b9e6SYuval Mintz if (!p_ent) 787fe56b9e6SYuval Mintz return -EINVAL; 788fe56b9e6SYuval Mintz 789fe56b9e6SYuval Mintz list_del(&p_ent->list); 790fe56b9e6SYuval Mintz 791fe56b9e6SYuval Mintz qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); 792fe56b9e6SYuval Mintz } 793fe56b9e6SYuval Mintz 794fe56b9e6SYuval Mintz return qed_spq_post_list(p_hwfn, &p_spq->pending, 795fe56b9e6SYuval Mintz SPQ_HIGH_PRI_RESERVE_DEFAULT); 796fe56b9e6SYuval Mintz } 797fe56b9e6SYuval Mintz 7982632f22eSDenis Bolotin /* Avoid overriding of SPQ entries when getting out-of-order completions, by 7992632f22eSDenis Bolotin * marking the completions in a bitmap and increasing the chain consumer only 8002632f22eSDenis Bolotin * for the first successive completed entries. 8012632f22eSDenis Bolotin */ 8022632f22eSDenis Bolotin static void qed_spq_comp_bmap_update(struct qed_hwfn *p_hwfn, __le16 echo) 8032632f22eSDenis Bolotin { 8042632f22eSDenis Bolotin u16 pos = le16_to_cpu(echo) % SPQ_RING_SIZE; 8052632f22eSDenis Bolotin struct qed_spq *p_spq = p_hwfn->p_spq; 8062632f22eSDenis Bolotin 8072632f22eSDenis Bolotin __set_bit(pos, p_spq->p_comp_bitmap); 8082632f22eSDenis Bolotin while (test_bit(p_spq->comp_bitmap_idx, 8092632f22eSDenis Bolotin p_spq->p_comp_bitmap)) { 8102632f22eSDenis Bolotin __clear_bit(p_spq->comp_bitmap_idx, 8112632f22eSDenis Bolotin p_spq->p_comp_bitmap); 8122632f22eSDenis Bolotin p_spq->comp_bitmap_idx++; 8132632f22eSDenis Bolotin qed_chain_return_produced(&p_spq->chain); 8142632f22eSDenis Bolotin } 8152632f22eSDenis Bolotin } 8162632f22eSDenis Bolotin 817fe56b9e6SYuval Mintz int qed_spq_post(struct qed_hwfn *p_hwfn, 8181a635e48SYuval Mintz struct qed_spq_entry *p_ent, u8 *fw_return_code) 819fe56b9e6SYuval Mintz { 820fe56b9e6SYuval Mintz int rc = 0; 821fe56b9e6SYuval Mintz struct qed_spq *p_spq = p_hwfn ? p_hwfn->p_spq : NULL; 822fe56b9e6SYuval Mintz bool b_ret_ent = true; 82370eeff66SRoland Dreier bool eblock; 824fe56b9e6SYuval Mintz 825fe56b9e6SYuval Mintz if (!p_hwfn) 826fe56b9e6SYuval Mintz return -EINVAL; 827fe56b9e6SYuval Mintz 828fe56b9e6SYuval Mintz if (!p_ent) { 829fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, "Got a NULL pointer\n"); 830fe56b9e6SYuval Mintz return -EINVAL; 831fe56b9e6SYuval Mintz } 832fe56b9e6SYuval Mintz 833fe56b9e6SYuval Mintz /* Complete the entry */ 834fe56b9e6SYuval Mintz rc = qed_spq_fill_entry(p_hwfn, p_ent); 835fe56b9e6SYuval Mintz 836fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 837fe56b9e6SYuval Mintz 838fe56b9e6SYuval Mintz /* Check return value after LOCK is taken for cleaner error flow */ 839fe56b9e6SYuval Mintz if (rc) 840fe56b9e6SYuval Mintz goto spq_post_fail; 841fe56b9e6SYuval Mintz 84270eeff66SRoland Dreier /* Check if entry is in block mode before qed_spq_add_entry, 84370eeff66SRoland Dreier * which might kfree p_ent. 84470eeff66SRoland Dreier */ 84570eeff66SRoland Dreier eblock = (p_ent->comp_mode == QED_SPQ_MODE_EBLOCK); 84670eeff66SRoland Dreier 847fe56b9e6SYuval Mintz /* Add the request to the pending queue */ 848fe56b9e6SYuval Mintz rc = qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); 849fe56b9e6SYuval Mintz if (rc) 850fe56b9e6SYuval Mintz goto spq_post_fail; 851fe56b9e6SYuval Mintz 852fe56b9e6SYuval Mintz rc = qed_spq_pend_post(p_hwfn); 853fe56b9e6SYuval Mintz if (rc) { 854fe56b9e6SYuval Mintz /* Since it's possible that pending failed for a different 855fe56b9e6SYuval Mintz * entry [although unlikely], the failed entry was already 856fe56b9e6SYuval Mintz * dealt with; No need to return it here. 857fe56b9e6SYuval Mintz */ 858fe56b9e6SYuval Mintz b_ret_ent = false; 859fe56b9e6SYuval Mintz goto spq_post_fail; 860fe56b9e6SYuval Mintz } 861fe56b9e6SYuval Mintz 862fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 863fe56b9e6SYuval Mintz 86470eeff66SRoland Dreier if (eblock) { 865fe56b9e6SYuval Mintz /* For entries in QED BLOCK mode, the completion code cannot 866fe56b9e6SYuval Mintz * perform the necessary cleanup - if it did, we couldn't 867fe56b9e6SYuval Mintz * access p_ent here to see whether it's successful or not. 868fe56b9e6SYuval Mintz * Thus, after gaining the answer perform the cleanup here. 869fe56b9e6SYuval Mintz */ 870c59f5291SYuval Mintz rc = qed_spq_block(p_hwfn, p_ent, fw_return_code, 871c59f5291SYuval Mintz p_ent->queue == &p_spq->unlimited_pending); 872db511c37SYuval Mintz 873db511c37SYuval Mintz if (p_ent->queue == &p_spq->unlimited_pending) { 8742632f22eSDenis Bolotin struct qed_spq_entry *p_post_ent = p_ent->post_ent; 8752632f22eSDenis Bolotin 876db511c37SYuval Mintz kfree(p_ent); 8772632f22eSDenis Bolotin 8782632f22eSDenis Bolotin /* Return the entry which was actually posted */ 8792632f22eSDenis Bolotin p_ent = p_post_ent; 880db511c37SYuval Mintz } 881db511c37SYuval Mintz 882fe56b9e6SYuval Mintz if (rc) 883fe56b9e6SYuval Mintz goto spq_post_fail2; 884fe56b9e6SYuval Mintz 885fe56b9e6SYuval Mintz /* return to pool */ 886fe56b9e6SYuval Mintz qed_spq_return_entry(p_hwfn, p_ent); 887fe56b9e6SYuval Mintz } 888fe56b9e6SYuval Mintz return rc; 889fe56b9e6SYuval Mintz 890fe56b9e6SYuval Mintz spq_post_fail2: 891fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 892fe56b9e6SYuval Mintz list_del(&p_ent->list); 8932632f22eSDenis Bolotin qed_spq_comp_bmap_update(p_hwfn, p_ent->elem.hdr.echo); 894fe56b9e6SYuval Mintz 895fe56b9e6SYuval Mintz spq_post_fail: 896fe56b9e6SYuval Mintz /* return to the free pool */ 897fe56b9e6SYuval Mintz if (b_ret_ent) 898fe56b9e6SYuval Mintz __qed_spq_return_entry(p_hwfn, p_ent); 899fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 900fe56b9e6SYuval Mintz 901fe56b9e6SYuval Mintz return rc; 902fe56b9e6SYuval Mintz } 903fe56b9e6SYuval Mintz 904fe56b9e6SYuval Mintz int qed_spq_completion(struct qed_hwfn *p_hwfn, 905fe56b9e6SYuval Mintz __le16 echo, 906fe56b9e6SYuval Mintz u8 fw_return_code, 907fe56b9e6SYuval Mintz union event_ring_data *p_data) 908fe56b9e6SYuval Mintz { 909fe56b9e6SYuval Mintz struct qed_spq *p_spq; 910fe56b9e6SYuval Mintz struct qed_spq_entry *p_ent = NULL; 911fe56b9e6SYuval Mintz struct qed_spq_entry *tmp; 912fe56b9e6SYuval Mintz struct qed_spq_entry *found = NULL; 913fe56b9e6SYuval Mintz 914fe56b9e6SYuval Mintz if (!p_hwfn) 915fe56b9e6SYuval Mintz return -EINVAL; 916fe56b9e6SYuval Mintz 917fe56b9e6SYuval Mintz p_spq = p_hwfn->p_spq; 918fe56b9e6SYuval Mintz if (!p_spq) 919fe56b9e6SYuval Mintz return -EINVAL; 920fe56b9e6SYuval Mintz 921fe56b9e6SYuval Mintz spin_lock_bh(&p_spq->lock); 9221a635e48SYuval Mintz list_for_each_entry_safe(p_ent, tmp, &p_spq->completion_pending, list) { 923fe56b9e6SYuval Mintz if (p_ent->elem.hdr.echo == echo) { 924fe56b9e6SYuval Mintz list_del(&p_ent->list); 9252632f22eSDenis Bolotin qed_spq_comp_bmap_update(p_hwfn, echo); 926fe56b9e6SYuval Mintz p_spq->comp_count++; 927fe56b9e6SYuval Mintz found = p_ent; 928fe56b9e6SYuval Mintz break; 929fe56b9e6SYuval Mintz } 93076a9a364STomer Tayar 93176a9a364STomer Tayar /* This is relatively uncommon - depends on scenarios 93276a9a364STomer Tayar * which have mutliple per-PF sent ramrods. 93376a9a364STomer Tayar */ 93476a9a364STomer Tayar DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 93576a9a364STomer Tayar "Got completion for echo %04x - doesn't match echo %04x in completion pending list\n", 93676a9a364STomer Tayar le16_to_cpu(echo), 93776a9a364STomer Tayar le16_to_cpu(p_ent->elem.hdr.echo)); 938fe56b9e6SYuval Mintz } 939fe56b9e6SYuval Mintz 940fe56b9e6SYuval Mintz /* Release lock before callback, as callback may post 941fe56b9e6SYuval Mintz * an additional ramrod. 942fe56b9e6SYuval Mintz */ 943fe56b9e6SYuval Mintz spin_unlock_bh(&p_spq->lock); 944fe56b9e6SYuval Mintz 945fe56b9e6SYuval Mintz if (!found) { 946fe56b9e6SYuval Mintz DP_NOTICE(p_hwfn, 947525ef5c0SYuval Mintz "Failed to find an entry this EQE [echo %04x] completes\n", 948525ef5c0SYuval Mintz le16_to_cpu(echo)); 949fe56b9e6SYuval Mintz return -EEXIST; 950fe56b9e6SYuval Mintz } 951fe56b9e6SYuval Mintz 952525ef5c0SYuval Mintz DP_VERBOSE(p_hwfn, QED_MSG_SPQ, 953525ef5c0SYuval Mintz "Complete EQE [echo %04x]: func %p cookie %p)\n", 954525ef5c0SYuval Mintz le16_to_cpu(echo), 955fe56b9e6SYuval Mintz p_ent->comp_cb.function, p_ent->comp_cb.cookie); 956fe56b9e6SYuval Mintz if (found->comp_cb.function) 957fe56b9e6SYuval Mintz found->comp_cb.function(p_hwfn, found->comp_cb.cookie, p_data, 958fe56b9e6SYuval Mintz fw_return_code); 959525ef5c0SYuval Mintz else 960525ef5c0SYuval Mintz DP_VERBOSE(p_hwfn, 961525ef5c0SYuval Mintz QED_MSG_SPQ, 962525ef5c0SYuval Mintz "Got a completion without a callback function\n"); 963fe56b9e6SYuval Mintz 9642632f22eSDenis Bolotin if (found->comp_mode != QED_SPQ_MODE_EBLOCK) 965db511c37SYuval Mintz /* EBLOCK is responsible for returning its own entry into the 9662632f22eSDenis Bolotin * free list. 967db511c37SYuval Mintz */ 968fe56b9e6SYuval Mintz qed_spq_return_entry(p_hwfn, found); 969fe56b9e6SYuval Mintz 970660492bcSManish Chopra return 0; 971fe56b9e6SYuval Mintz } 972fe56b9e6SYuval Mintz 9733587cb87STomer Tayar int qed_consq_alloc(struct qed_hwfn *p_hwfn) 974fe56b9e6SYuval Mintz { 975fe56b9e6SYuval Mintz struct qed_consq *p_consq; 976fe56b9e6SYuval Mintz 977fe56b9e6SYuval Mintz /* Allocate ConsQ struct */ 97860fffb3bSYuval Mintz p_consq = kzalloc(sizeof(*p_consq), GFP_KERNEL); 9792591c280SJoe Perches if (!p_consq) 9803587cb87STomer Tayar return -ENOMEM; 981fe56b9e6SYuval Mintz 982fe56b9e6SYuval Mintz /* Allocate and initialize EQ chain*/ 983fe56b9e6SYuval Mintz if (qed_chain_alloc(p_hwfn->cdev, 984fe56b9e6SYuval Mintz QED_CHAIN_USE_TO_PRODUCE, 985fe56b9e6SYuval Mintz QED_CHAIN_MODE_PBL, 986a91eb52aSYuval Mintz QED_CHAIN_CNT_TYPE_U16, 987fe56b9e6SYuval Mintz QED_CHAIN_PAGE_SIZE / 0x80, 9881a4a6975SMintz, Yuval 0x80, &p_consq->chain, NULL)) 989fe56b9e6SYuval Mintz goto consq_allocate_fail; 990fe56b9e6SYuval Mintz 9913587cb87STomer Tayar p_hwfn->p_consq = p_consq; 9923587cb87STomer Tayar return 0; 993fe56b9e6SYuval Mintz 994fe56b9e6SYuval Mintz consq_allocate_fail: 995fe56b9e6SYuval Mintz kfree(p_consq); 9963587cb87STomer Tayar return -ENOMEM; 9973587cb87STomer Tayar } 9983587cb87STomer Tayar 9993587cb87STomer Tayar void qed_consq_setup(struct qed_hwfn *p_hwfn) 10003587cb87STomer Tayar { 10013587cb87STomer Tayar qed_chain_reset(&p_hwfn->p_consq->chain); 10023587cb87STomer Tayar } 10033587cb87STomer Tayar 10043587cb87STomer Tayar void qed_consq_free(struct qed_hwfn *p_hwfn) 10053587cb87STomer Tayar { 10063587cb87STomer Tayar if (!p_hwfn->p_consq) 10073587cb87STomer Tayar return; 10083587cb87STomer Tayar 10093587cb87STomer Tayar qed_chain_free(p_hwfn->cdev, &p_hwfn->p_consq->chain); 10103587cb87STomer Tayar 10113587cb87STomer Tayar kfree(p_hwfn->p_consq); 10123587cb87STomer Tayar p_hwfn->p_consq = NULL; 1013fe56b9e6SYuval Mintz } 1014