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1// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)2/* Copyright 2021 Marvell. All rights reserved. */3 4#include <linux/types.h>5#include <asm/byteorder.h>6#include <asm/param.h>7#include <linux/delay.h>8#include <linux/dma-mapping.h>9#include <linux/etherdevice.h>10#include <linux/kernel.h>11#include <linux/log2.h>12#include <linux/module.h>13#include <linux/pci.h>14#include <linux/stddef.h>15#include <linux/string.h>16#include <linux/errno.h>17#include <linux/list.h>18#include <linux/qed/qed_nvmetcp_if.h>19#include "qed.h"20#include "qed_cxt.h"21#include "qed_dev_api.h"22#include "qed_hsi.h"23#include "qed_hw.h"24#include "qed_int.h"25#include "qed_nvmetcp.h"26#include "qed_ll2.h"27#include "qed_mcp.h"28#include "qed_sp.h"29#include "qed_reg_addr.h"30#include "qed_nvmetcp_fw_funcs.h"31 32static int qed_nvmetcp_async_event(struct qed_hwfn *p_hwfn, u8 fw_event_code,33 u16 echo, union event_ring_data *data,34 u8 fw_return_code)35{36 if (p_hwfn->p_nvmetcp_info->event_cb) {37 struct qed_nvmetcp_info *p_nvmetcp = p_hwfn->p_nvmetcp_info;38 39 return p_nvmetcp->event_cb(p_nvmetcp->event_context,40 fw_event_code, data);41 } else {42 DP_NOTICE(p_hwfn, "nvmetcp async completion is not set\n");43 44 return -EINVAL;45 }46}47 48static int qed_sp_nvmetcp_func_start(struct qed_hwfn *p_hwfn,49 enum spq_mode comp_mode,50 struct qed_spq_comp_cb *p_comp_addr,51 void *event_context,52 nvmetcp_event_cb_t async_event_cb)53{54 struct nvmetcp_init_ramrod_params *p_ramrod = NULL;55 struct qed_nvmetcp_pf_params *p_params = NULL;56 struct scsi_init_func_queues *p_queue = NULL;57 struct nvmetcp_spe_func_init *p_init = NULL;58 struct qed_sp_init_data init_data = {};59 struct qed_spq_entry *p_ent = NULL;60 int rc = 0;61 u16 val;62 u8 i;63 64 /* Get SPQ entry */65 init_data.cid = qed_spq_get_cid(p_hwfn);66 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;67 init_data.comp_mode = comp_mode;68 init_data.p_comp_data = p_comp_addr;69 rc = qed_sp_init_request(p_hwfn, &p_ent,70 NVMETCP_RAMROD_CMD_ID_INIT_FUNC,71 PROTOCOLID_TCP_ULP, &init_data);72 if (rc)73 return rc;74 75 p_ramrod = &p_ent->ramrod.nvmetcp_init;76 p_init = &p_ramrod->nvmetcp_init_spe;77 p_params = &p_hwfn->pf_params.nvmetcp_pf_params;78 p_queue = &p_init->q_params;79 p_init->num_sq_pages_in_ring = p_params->num_sq_pages_in_ring;80 p_init->num_r2tq_pages_in_ring = p_params->num_r2tq_pages_in_ring;81 p_init->num_uhq_pages_in_ring = p_params->num_uhq_pages_in_ring;82 p_init->ll2_rx_queue_id = RESC_START(p_hwfn, QED_LL2_RAM_QUEUE) +83 p_params->ll2_ooo_queue_id;84 SET_FIELD(p_init->flags, NVMETCP_SPE_FUNC_INIT_NVMETCP_MODE, 1);85 p_init->func_params.log_page_size = ilog2(PAGE_SIZE);86 p_init->func_params.num_tasks = cpu_to_le16(p_params->num_tasks);87 p_init->debug_flags = p_params->debug_mode;88 DMA_REGPAIR_LE(p_queue->glbl_q_params_addr,89 p_params->glbl_q_params_addr);90 p_queue->cq_num_entries = cpu_to_le16(QED_NVMETCP_FW_CQ_SIZE);91 p_queue->num_queues = p_params->num_queues;92 val = RESC_START(p_hwfn, QED_CMDQS_CQS);93 p_queue->queue_relative_offset = cpu_to_le16((u16)val);94 p_queue->cq_sb_pi = p_params->gl_rq_pi;95 96 for (i = 0; i < p_params->num_queues; i++) {97 val = qed_get_igu_sb_id(p_hwfn, i);98 p_queue->cq_cmdq_sb_num_arr[i] = cpu_to_le16(val);99 }100 101 SET_FIELD(p_queue->q_validity,102 SCSI_INIT_FUNC_QUEUES_CMD_VALID, 0);103 p_queue->cmdq_num_entries = 0;104 p_queue->bdq_resource_id = (u8)RESC_START(p_hwfn, QED_BDQ);105 p_ramrod->tcp_init.two_msl_timer = cpu_to_le32(QED_TCP_TWO_MSL_TIMER);106 p_ramrod->tcp_init.tx_sws_timer = cpu_to_le16(QED_TCP_SWS_TIMER);107 p_init->half_way_close_timeout = cpu_to_le16(QED_TCP_HALF_WAY_CLOSE_TIMEOUT);108 p_ramrod->tcp_init.max_fin_rt = QED_TCP_MAX_FIN_RT;109 SET_FIELD(p_ramrod->nvmetcp_init_spe.params,110 NVMETCP_SPE_FUNC_INIT_MAX_SYN_RT, QED_TCP_MAX_FIN_RT);111 p_hwfn->p_nvmetcp_info->event_context = event_context;112 p_hwfn->p_nvmetcp_info->event_cb = async_event_cb;113 qed_spq_register_async_cb(p_hwfn, PROTOCOLID_TCP_ULP,114 qed_nvmetcp_async_event);115 116 return qed_spq_post(p_hwfn, p_ent, NULL);117}118 119static int qed_sp_nvmetcp_func_stop(struct qed_hwfn *p_hwfn,120 enum spq_mode comp_mode,121 struct qed_spq_comp_cb *p_comp_addr)122{123 struct qed_spq_entry *p_ent = NULL;124 struct qed_sp_init_data init_data;125 int rc;126 127 /* Get SPQ entry */128 memset(&init_data, 0, sizeof(init_data));129 init_data.cid = qed_spq_get_cid(p_hwfn);130 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;131 init_data.comp_mode = comp_mode;132 init_data.p_comp_data = p_comp_addr;133 rc = qed_sp_init_request(p_hwfn, &p_ent,134 NVMETCP_RAMROD_CMD_ID_DESTROY_FUNC,135 PROTOCOLID_TCP_ULP, &init_data);136 if (rc)137 return rc;138 139 rc = qed_spq_post(p_hwfn, p_ent, NULL);140 qed_spq_unregister_async_cb(p_hwfn, PROTOCOLID_TCP_ULP);141 142 return rc;143}144 145static int qed_fill_nvmetcp_dev_info(struct qed_dev *cdev,146 struct qed_dev_nvmetcp_info *info)147{148 struct qed_hwfn *hwfn = QED_AFFIN_HWFN(cdev);149 int rc;150 151 memset(info, 0, sizeof(*info));152 rc = qed_fill_dev_info(cdev, &info->common);153 info->port_id = MFW_PORT(hwfn);154 info->num_cqs = FEAT_NUM(hwfn, QED_NVMETCP_CQ);155 156 return rc;157}158 159static void qed_register_nvmetcp_ops(struct qed_dev *cdev,160 struct qed_nvmetcp_cb_ops *ops,161 void *cookie)162{163 cdev->protocol_ops.nvmetcp = ops;164 cdev->ops_cookie = cookie;165}166 167static int qed_nvmetcp_stop(struct qed_dev *cdev)168{169 int rc;170 171 if (!(cdev->flags & QED_FLAG_STORAGE_STARTED)) {172 DP_NOTICE(cdev, "nvmetcp already stopped\n");173 174 return 0;175 }176 177 if (!hash_empty(cdev->connections)) {178 DP_NOTICE(cdev,179 "Can't stop nvmetcp - not all connections were returned\n");180 181 return -EINVAL;182 }183 184 /* Stop the nvmetcp */185 rc = qed_sp_nvmetcp_func_stop(QED_AFFIN_HWFN(cdev), QED_SPQ_MODE_EBLOCK,186 NULL);187 cdev->flags &= ~QED_FLAG_STORAGE_STARTED;188 189 return rc;190}191 192static int qed_nvmetcp_start(struct qed_dev *cdev,193 struct qed_nvmetcp_tid *tasks,194 void *event_context,195 nvmetcp_event_cb_t async_event_cb)196{197 struct qed_tid_mem *tid_info;198 int rc;199 200 if (cdev->flags & QED_FLAG_STORAGE_STARTED) {201 DP_NOTICE(cdev, "nvmetcp already started;\n");202 203 return 0;204 }205 206 rc = qed_sp_nvmetcp_func_start(QED_AFFIN_HWFN(cdev),207 QED_SPQ_MODE_EBLOCK, NULL,208 event_context, async_event_cb);209 if (rc) {210 DP_NOTICE(cdev, "Failed to start nvmetcp\n");211 212 return rc;213 }214 215 cdev->flags |= QED_FLAG_STORAGE_STARTED;216 hash_init(cdev->connections);217 218 if (!tasks)219 return 0;220 221 tid_info = kzalloc(sizeof(*tid_info), GFP_KERNEL);222 if (!tid_info) {223 qed_nvmetcp_stop(cdev);224 225 return -ENOMEM;226 }227 228 rc = qed_cxt_get_tid_mem_info(QED_AFFIN_HWFN(cdev), tid_info);229 if (rc) {230 DP_NOTICE(cdev, "Failed to gather task information\n");231 qed_nvmetcp_stop(cdev);232 kfree(tid_info);233 234 return rc;235 }236 237 /* Fill task information */238 tasks->size = tid_info->tid_size;239 tasks->num_tids_per_block = tid_info->num_tids_per_block;240 memcpy(tasks->blocks, tid_info->blocks,241 MAX_TID_BLOCKS_NVMETCP * sizeof(u8 *));242 kfree(tid_info);243 244 return 0;245}246 247static struct qed_hash_nvmetcp_con *qed_nvmetcp_get_hash(struct qed_dev *cdev,248 u32 handle)249{250 struct qed_hash_nvmetcp_con *hash_con = NULL;251 252 if (!(cdev->flags & QED_FLAG_STORAGE_STARTED))253 return NULL;254 255 hash_for_each_possible(cdev->connections, hash_con, node, handle) {256 if (hash_con->con->icid == handle)257 break;258 }259 260 if (!hash_con || hash_con->con->icid != handle)261 return NULL;262 263 return hash_con;264}265 266static int qed_sp_nvmetcp_conn_offload(struct qed_hwfn *p_hwfn,267 struct qed_nvmetcp_conn *p_conn,268 enum spq_mode comp_mode,269 struct qed_spq_comp_cb *p_comp_addr)270{271 struct nvmetcp_spe_conn_offload *p_ramrod = NULL;272 struct tcp_offload_params_opt2 *p_tcp = NULL;273 struct qed_sp_init_data init_data = { 0 };274 struct qed_spq_entry *p_ent = NULL;275 dma_addr_t r2tq_pbl_addr;276 dma_addr_t xhq_pbl_addr;277 dma_addr_t uhq_pbl_addr;278 u16 physical_q;279 int rc = 0;280 u8 i;281 282 /* Get SPQ entry */283 init_data.cid = p_conn->icid;284 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;285 init_data.comp_mode = comp_mode;286 init_data.p_comp_data = p_comp_addr;287 rc = qed_sp_init_request(p_hwfn, &p_ent,288 NVMETCP_RAMROD_CMD_ID_OFFLOAD_CONN,289 PROTOCOLID_TCP_ULP, &init_data);290 if (rc)291 return rc;292 293 p_ramrod = &p_ent->ramrod.nvmetcp_conn_offload;294 295 /* Transmission PQ is the first of the PF */296 physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);297 p_conn->physical_q0 = cpu_to_le16(physical_q);298 p_ramrod->nvmetcp.physical_q0 = cpu_to_le16(physical_q);299 300 /* nvmetcp Pure-ACK PQ */301 physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_ACK);302 p_conn->physical_q1 = cpu_to_le16(physical_q);303 p_ramrod->nvmetcp.physical_q1 = cpu_to_le16(physical_q);304 p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);305 DMA_REGPAIR_LE(p_ramrod->nvmetcp.sq_pbl_addr, p_conn->sq_pbl_addr);306 r2tq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->r2tq);307 DMA_REGPAIR_LE(p_ramrod->nvmetcp.r2tq_pbl_addr, r2tq_pbl_addr);308 xhq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->xhq);309 DMA_REGPAIR_LE(p_ramrod->nvmetcp.xhq_pbl_addr, xhq_pbl_addr);310 uhq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->uhq);311 DMA_REGPAIR_LE(p_ramrod->nvmetcp.uhq_pbl_addr, uhq_pbl_addr);312 p_ramrod->nvmetcp.flags = p_conn->offl_flags;313 p_ramrod->nvmetcp.default_cq = p_conn->default_cq;314 p_ramrod->nvmetcp.initial_ack = 0;315 DMA_REGPAIR_LE(p_ramrod->nvmetcp.nvmetcp.cccid_itid_table_addr,316 p_conn->nvmetcp_cccid_itid_table_addr);317 p_ramrod->nvmetcp.nvmetcp.cccid_max_range =318 cpu_to_le16(p_conn->nvmetcp_cccid_max_range);319 p_tcp = &p_ramrod->tcp;320 qed_set_fw_mac_addr(&p_tcp->remote_mac_addr_hi,321 &p_tcp->remote_mac_addr_mid,322 &p_tcp->remote_mac_addr_lo, p_conn->remote_mac);323 qed_set_fw_mac_addr(&p_tcp->local_mac_addr_hi,324 &p_tcp->local_mac_addr_mid,325 &p_tcp->local_mac_addr_lo, p_conn->local_mac);326 p_tcp->vlan_id = cpu_to_le16(p_conn->vlan_id);327 p_tcp->flags = cpu_to_le16(p_conn->tcp_flags);328 p_tcp->ip_version = p_conn->ip_version;329 if (p_tcp->ip_version == TCP_IPV6) {330 for (i = 0; i < 4; i++) {331 p_tcp->remote_ip[i] = cpu_to_le32(p_conn->remote_ip[i]);332 p_tcp->local_ip[i] = cpu_to_le32(p_conn->local_ip[i]);333 }334 } else {335 p_tcp->remote_ip[0] = cpu_to_le32(p_conn->remote_ip[0]);336 p_tcp->local_ip[0] = cpu_to_le32(p_conn->local_ip[0]);337 }338 339 p_tcp->flow_label = cpu_to_le32(p_conn->flow_label);340 p_tcp->ttl = p_conn->ttl;341 p_tcp->tos_or_tc = p_conn->tos_or_tc;342 p_tcp->remote_port = cpu_to_le16(p_conn->remote_port);343 p_tcp->local_port = cpu_to_le16(p_conn->local_port);344 p_tcp->mss = cpu_to_le16(p_conn->mss);345 p_tcp->rcv_wnd_scale = p_conn->rcv_wnd_scale;346 p_tcp->connect_mode = p_conn->connect_mode;347 p_tcp->cwnd = cpu_to_le32(p_conn->cwnd);348 p_tcp->ka_max_probe_cnt = p_conn->ka_max_probe_cnt;349 p_tcp->ka_timeout = cpu_to_le32(p_conn->ka_timeout);350 p_tcp->max_rt_time = cpu_to_le32(p_conn->max_rt_time);351 p_tcp->ka_interval = cpu_to_le32(p_conn->ka_interval);352 353 return qed_spq_post(p_hwfn, p_ent, NULL);354}355 356static int qed_sp_nvmetcp_conn_update(struct qed_hwfn *p_hwfn,357 struct qed_nvmetcp_conn *p_conn,358 enum spq_mode comp_mode,359 struct qed_spq_comp_cb *p_comp_addr)360{361 struct nvmetcp_conn_update_ramrod_params *p_ramrod = NULL;362 struct qed_spq_entry *p_ent = NULL;363 struct qed_sp_init_data init_data;364 int rc = -EINVAL;365 u32 dval;366 367 /* Get SPQ entry */368 memset(&init_data, 0, sizeof(init_data));369 init_data.cid = p_conn->icid;370 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;371 init_data.comp_mode = comp_mode;372 init_data.p_comp_data = p_comp_addr;373 374 rc = qed_sp_init_request(p_hwfn, &p_ent,375 NVMETCP_RAMROD_CMD_ID_UPDATE_CONN,376 PROTOCOLID_TCP_ULP, &init_data);377 if (rc)378 return rc;379 380 p_ramrod = &p_ent->ramrod.nvmetcp_conn_update;381 p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);382 p_ramrod->flags = p_conn->update_flag;383 p_ramrod->max_seq_size = cpu_to_le32(p_conn->max_seq_size);384 dval = p_conn->max_recv_pdu_length;385 p_ramrod->max_recv_pdu_length = cpu_to_le32(dval);386 dval = p_conn->max_send_pdu_length;387 p_ramrod->max_send_pdu_length = cpu_to_le32(dval);388 p_ramrod->first_seq_length = cpu_to_le32(p_conn->first_seq_length);389 390 return qed_spq_post(p_hwfn, p_ent, NULL);391}392 393static int qed_sp_nvmetcp_conn_terminate(struct qed_hwfn *p_hwfn,394 struct qed_nvmetcp_conn *p_conn,395 enum spq_mode comp_mode,396 struct qed_spq_comp_cb *p_comp_addr)397{398 struct nvmetcp_spe_conn_termination *p_ramrod = NULL;399 struct qed_spq_entry *p_ent = NULL;400 struct qed_sp_init_data init_data;401 int rc = -EINVAL;402 403 /* Get SPQ entry */404 memset(&init_data, 0, sizeof(init_data));405 init_data.cid = p_conn->icid;406 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;407 init_data.comp_mode = comp_mode;408 init_data.p_comp_data = p_comp_addr;409 rc = qed_sp_init_request(p_hwfn, &p_ent,410 NVMETCP_RAMROD_CMD_ID_TERMINATION_CONN,411 PROTOCOLID_TCP_ULP, &init_data);412 if (rc)413 return rc;414 415 p_ramrod = &p_ent->ramrod.nvmetcp_conn_terminate;416 p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);417 p_ramrod->abortive = p_conn->abortive_dsconnect;418 419 return qed_spq_post(p_hwfn, p_ent, NULL);420}421 422static int qed_sp_nvmetcp_conn_clear_sq(struct qed_hwfn *p_hwfn,423 struct qed_nvmetcp_conn *p_conn,424 enum spq_mode comp_mode,425 struct qed_spq_comp_cb *p_comp_addr)426{427 struct qed_spq_entry *p_ent = NULL;428 struct qed_sp_init_data init_data;429 int rc = -EINVAL;430 431 /* Get SPQ entry */432 memset(&init_data, 0, sizeof(init_data));433 init_data.cid = p_conn->icid;434 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;435 init_data.comp_mode = comp_mode;436 init_data.p_comp_data = p_comp_addr;437 rc = qed_sp_init_request(p_hwfn, &p_ent,438 NVMETCP_RAMROD_CMD_ID_CLEAR_SQ,439 PROTOCOLID_TCP_ULP, &init_data);440 if (rc)441 return rc;442 443 return qed_spq_post(p_hwfn, p_ent, NULL);444}445 446static void __iomem *qed_nvmetcp_get_db_addr(struct qed_hwfn *p_hwfn, u32 cid)447{448 return (u8 __iomem *)p_hwfn->doorbells +449 qed_db_addr(cid, DQ_DEMS_LEGACY);450}451 452static int qed_nvmetcp_allocate_connection(struct qed_hwfn *p_hwfn,453 struct qed_nvmetcp_conn **p_out_conn)454{455 struct qed_chain_init_params params = {456 .mode = QED_CHAIN_MODE_PBL,457 .intended_use = QED_CHAIN_USE_TO_CONSUME_PRODUCE,458 .cnt_type = QED_CHAIN_CNT_TYPE_U16,459 };460 struct qed_nvmetcp_pf_params *p_params = NULL;461 struct qed_nvmetcp_conn *p_conn = NULL;462 int rc = 0;463 464 /* Try finding a free connection that can be used */465 spin_lock_bh(&p_hwfn->p_nvmetcp_info->lock);466 if (!list_empty(&p_hwfn->p_nvmetcp_info->free_list))467 p_conn = list_first_entry(&p_hwfn->p_nvmetcp_info->free_list,468 struct qed_nvmetcp_conn, list_entry);469 if (p_conn) {470 list_del(&p_conn->list_entry);471 spin_unlock_bh(&p_hwfn->p_nvmetcp_info->lock);472 *p_out_conn = p_conn;473 474 return 0;475 }476 spin_unlock_bh(&p_hwfn->p_nvmetcp_info->lock);477 478 /* Need to allocate a new connection */479 p_params = &p_hwfn->pf_params.nvmetcp_pf_params;480 p_conn = kzalloc(sizeof(*p_conn), GFP_KERNEL);481 if (!p_conn)482 return -ENOMEM;483 484 params.num_elems = p_params->num_r2tq_pages_in_ring *485 QED_CHAIN_PAGE_SIZE / sizeof(struct nvmetcp_wqe);486 params.elem_size = sizeof(struct nvmetcp_wqe);487 rc = qed_chain_alloc(p_hwfn->cdev, &p_conn->r2tq, ¶ms);488 if (rc)489 goto nomem_r2tq;490 491 params.num_elems = p_params->num_uhq_pages_in_ring *492 QED_CHAIN_PAGE_SIZE / sizeof(struct iscsi_uhqe);493 params.elem_size = sizeof(struct iscsi_uhqe);494 rc = qed_chain_alloc(p_hwfn->cdev, &p_conn->uhq, ¶ms);495 if (rc)496 goto nomem_uhq;497 498 params.elem_size = sizeof(struct iscsi_xhqe);499 rc = qed_chain_alloc(p_hwfn->cdev, &p_conn->xhq, ¶ms);500 if (rc)501 goto nomem;502 503 p_conn->free_on_delete = true;504 *p_out_conn = p_conn;505 506 return 0;507 508nomem:509 qed_chain_free(p_hwfn->cdev, &p_conn->uhq);510nomem_uhq:511 qed_chain_free(p_hwfn->cdev, &p_conn->r2tq);512nomem_r2tq:513 kfree(p_conn);514 515 return -ENOMEM;516}517 518static int qed_nvmetcp_acquire_connection(struct qed_hwfn *p_hwfn,519 struct qed_nvmetcp_conn **p_out_conn)520{521 struct qed_nvmetcp_conn *p_conn = NULL;522 int rc = 0;523 u32 icid;524 525 spin_lock_bh(&p_hwfn->p_nvmetcp_info->lock);526 rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_TCP_ULP, &icid);527 spin_unlock_bh(&p_hwfn->p_nvmetcp_info->lock);528 529 if (rc)530 return rc;531 532 rc = qed_nvmetcp_allocate_connection(p_hwfn, &p_conn);533 if (rc) {534 spin_lock_bh(&p_hwfn->p_nvmetcp_info->lock);535 qed_cxt_release_cid(p_hwfn, icid);536 spin_unlock_bh(&p_hwfn->p_nvmetcp_info->lock);537 538 return rc;539 }540 541 p_conn->icid = icid;542 p_conn->conn_id = (u16)icid;543 p_conn->fw_cid = (p_hwfn->hw_info.opaque_fid << 16) | icid;544 *p_out_conn = p_conn;545 546 return rc;547}548 549static void qed_nvmetcp_release_connection(struct qed_hwfn *p_hwfn,550 struct qed_nvmetcp_conn *p_conn)551{552 spin_lock_bh(&p_hwfn->p_nvmetcp_info->lock);553 list_add_tail(&p_conn->list_entry, &p_hwfn->p_nvmetcp_info->free_list);554 qed_cxt_release_cid(p_hwfn, p_conn->icid);555 spin_unlock_bh(&p_hwfn->p_nvmetcp_info->lock);556}557 558static void qed_nvmetcp_free_connection(struct qed_hwfn *p_hwfn,559 struct qed_nvmetcp_conn *p_conn)560{561 qed_chain_free(p_hwfn->cdev, &p_conn->xhq);562 qed_chain_free(p_hwfn->cdev, &p_conn->uhq);563 qed_chain_free(p_hwfn->cdev, &p_conn->r2tq);564 kfree(p_conn);565}566 567int qed_nvmetcp_alloc(struct qed_hwfn *p_hwfn)568{569 struct qed_nvmetcp_info *p_nvmetcp_info;570 571 p_nvmetcp_info = kzalloc(sizeof(*p_nvmetcp_info), GFP_KERNEL);572 if (!p_nvmetcp_info)573 return -ENOMEM;574 575 INIT_LIST_HEAD(&p_nvmetcp_info->free_list);576 p_hwfn->p_nvmetcp_info = p_nvmetcp_info;577 578 return 0;579}580 581void qed_nvmetcp_setup(struct qed_hwfn *p_hwfn)582{583 spin_lock_init(&p_hwfn->p_nvmetcp_info->lock);584}585 586void qed_nvmetcp_free(struct qed_hwfn *p_hwfn)587{588 struct qed_nvmetcp_conn *p_conn = NULL;589 590 if (!p_hwfn->p_nvmetcp_info)591 return;592 593 while (!list_empty(&p_hwfn->p_nvmetcp_info->free_list)) {594 p_conn = list_first_entry(&p_hwfn->p_nvmetcp_info->free_list,595 struct qed_nvmetcp_conn, list_entry);596 if (p_conn) {597 list_del(&p_conn->list_entry);598 qed_nvmetcp_free_connection(p_hwfn, p_conn);599 }600 }601 602 kfree(p_hwfn->p_nvmetcp_info);603 p_hwfn->p_nvmetcp_info = NULL;604}605 606static int qed_nvmetcp_acquire_conn(struct qed_dev *cdev,607 u32 *handle,608 u32 *fw_cid, void __iomem **p_doorbell)609{610 struct qed_hash_nvmetcp_con *hash_con;611 int rc;612 613 /* Allocate a hashed connection */614 hash_con = kzalloc(sizeof(*hash_con), GFP_ATOMIC);615 if (!hash_con)616 return -ENOMEM;617 618 /* Acquire the connection */619 rc = qed_nvmetcp_acquire_connection(QED_AFFIN_HWFN(cdev),620 &hash_con->con);621 if (rc) {622 DP_NOTICE(cdev, "Failed to acquire Connection\n");623 kfree(hash_con);624 625 return rc;626 }627 628 /* Added the connection to hash table */629 *handle = hash_con->con->icid;630 *fw_cid = hash_con->con->fw_cid;631 hash_add(cdev->connections, &hash_con->node, *handle);632 if (p_doorbell)633 *p_doorbell = qed_nvmetcp_get_db_addr(QED_AFFIN_HWFN(cdev),634 *handle);635 636 return 0;637}638 639static int qed_nvmetcp_release_conn(struct qed_dev *cdev, u32 handle)640{641 struct qed_hash_nvmetcp_con *hash_con;642 643 hash_con = qed_nvmetcp_get_hash(cdev, handle);644 if (!hash_con) {645 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",646 handle);647 648 return -EINVAL;649 }650 651 hlist_del(&hash_con->node);652 qed_nvmetcp_release_connection(QED_AFFIN_HWFN(cdev), hash_con->con);653 kfree(hash_con);654 655 return 0;656}657 658static int qed_nvmetcp_offload_conn(struct qed_dev *cdev, u32 handle,659 struct qed_nvmetcp_params_offload *conn_info)660{661 struct qed_hash_nvmetcp_con *hash_con;662 struct qed_nvmetcp_conn *con;663 664 hash_con = qed_nvmetcp_get_hash(cdev, handle);665 if (!hash_con) {666 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",667 handle);668 669 return -EINVAL;670 }671 672 /* Update the connection with information from the params */673 con = hash_con->con;674 675 /* FW initializations */676 con->layer_code = NVMETCP_SLOW_PATH_LAYER_CODE;677 con->sq_pbl_addr = conn_info->sq_pbl_addr;678 con->nvmetcp_cccid_max_range = conn_info->nvmetcp_cccid_max_range;679 con->nvmetcp_cccid_itid_table_addr = conn_info->nvmetcp_cccid_itid_table_addr;680 con->default_cq = conn_info->default_cq;681 SET_FIELD(con->offl_flags, NVMETCP_CONN_OFFLOAD_PARAMS_TARGET_MODE, 0);682 SET_FIELD(con->offl_flags, NVMETCP_CONN_OFFLOAD_PARAMS_NVMETCP_MODE, 1);683 SET_FIELD(con->offl_flags, NVMETCP_CONN_OFFLOAD_PARAMS_TCP_ON_CHIP_1B, 1);684 685 /* Networking and TCP stack initializations */686 ether_addr_copy(con->local_mac, conn_info->src.mac);687 ether_addr_copy(con->remote_mac, conn_info->dst.mac);688 memcpy(con->local_ip, conn_info->src.ip, sizeof(con->local_ip));689 memcpy(con->remote_ip, conn_info->dst.ip, sizeof(con->remote_ip));690 con->local_port = conn_info->src.port;691 con->remote_port = conn_info->dst.port;692 con->vlan_id = conn_info->vlan_id;693 694 if (conn_info->timestamp_en)695 SET_FIELD(con->tcp_flags, TCP_OFFLOAD_PARAMS_OPT2_TS_EN, 1);696 697 if (conn_info->delayed_ack_en)698 SET_FIELD(con->tcp_flags, TCP_OFFLOAD_PARAMS_OPT2_DA_EN, 1);699 700 if (conn_info->tcp_keep_alive_en)701 SET_FIELD(con->tcp_flags, TCP_OFFLOAD_PARAMS_OPT2_KA_EN, 1);702 703 if (conn_info->ecn_en)704 SET_FIELD(con->tcp_flags, TCP_OFFLOAD_PARAMS_OPT2_ECN_EN, 1);705 706 con->ip_version = conn_info->ip_version;707 con->flow_label = QED_TCP_FLOW_LABEL;708 con->ka_max_probe_cnt = conn_info->ka_max_probe_cnt;709 con->ka_timeout = conn_info->ka_timeout;710 con->ka_interval = conn_info->ka_interval;711 con->max_rt_time = conn_info->max_rt_time;712 con->ttl = conn_info->ttl;713 con->tos_or_tc = conn_info->tos_or_tc;714 con->mss = conn_info->mss;715 con->cwnd = conn_info->cwnd;716 con->rcv_wnd_scale = conn_info->rcv_wnd_scale;717 con->connect_mode = 0;718 719 return qed_sp_nvmetcp_conn_offload(QED_AFFIN_HWFN(cdev), con,720 QED_SPQ_MODE_EBLOCK, NULL);721}722 723static int qed_nvmetcp_update_conn(struct qed_dev *cdev,724 u32 handle,725 struct qed_nvmetcp_params_update *conn_info)726{727 struct qed_hash_nvmetcp_con *hash_con;728 struct qed_nvmetcp_conn *con;729 730 hash_con = qed_nvmetcp_get_hash(cdev, handle);731 if (!hash_con) {732 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",733 handle);734 735 return -EINVAL;736 }737 738 /* Update the connection with information from the params */739 con = hash_con->con;740 SET_FIELD(con->update_flag,741 ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T, 0);742 SET_FIELD(con->update_flag,743 ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA, 1);744 if (conn_info->hdr_digest_en)745 SET_FIELD(con->update_flag, ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN, 1);746 747 if (conn_info->data_digest_en)748 SET_FIELD(con->update_flag, ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN, 1);749 750 /* Placeholder - initialize pfv, cpda, hpda */751 752 con->max_seq_size = conn_info->max_io_size;753 con->max_recv_pdu_length = conn_info->max_recv_pdu_length;754 con->max_send_pdu_length = conn_info->max_send_pdu_length;755 con->first_seq_length = conn_info->max_io_size;756 757 return qed_sp_nvmetcp_conn_update(QED_AFFIN_HWFN(cdev), con,758 QED_SPQ_MODE_EBLOCK, NULL);759}760 761static int qed_nvmetcp_clear_conn_sq(struct qed_dev *cdev, u32 handle)762{763 struct qed_hash_nvmetcp_con *hash_con;764 765 hash_con = qed_nvmetcp_get_hash(cdev, handle);766 if (!hash_con) {767 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",768 handle);769 770 return -EINVAL;771 }772 773 return qed_sp_nvmetcp_conn_clear_sq(QED_AFFIN_HWFN(cdev), hash_con->con,774 QED_SPQ_MODE_EBLOCK, NULL);775}776 777static int qed_nvmetcp_destroy_conn(struct qed_dev *cdev,778 u32 handle, u8 abrt_conn)779{780 struct qed_hash_nvmetcp_con *hash_con;781 782 hash_con = qed_nvmetcp_get_hash(cdev, handle);783 if (!hash_con) {784 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",785 handle);786 787 return -EINVAL;788 }789 790 hash_con->con->abortive_dsconnect = abrt_conn;791 792 return qed_sp_nvmetcp_conn_terminate(QED_AFFIN_HWFN(cdev), hash_con->con,793 QED_SPQ_MODE_EBLOCK, NULL);794}795 796static const struct qed_nvmetcp_ops qed_nvmetcp_ops_pass = {797 .common = &qed_common_ops_pass,798 .ll2 = &qed_ll2_ops_pass,799 .fill_dev_info = &qed_fill_nvmetcp_dev_info,800 .register_ops = &qed_register_nvmetcp_ops,801 .start = &qed_nvmetcp_start,802 .stop = &qed_nvmetcp_stop,803 .acquire_conn = &qed_nvmetcp_acquire_conn,804 .release_conn = &qed_nvmetcp_release_conn,805 .offload_conn = &qed_nvmetcp_offload_conn,806 .update_conn = &qed_nvmetcp_update_conn,807 .destroy_conn = &qed_nvmetcp_destroy_conn,808 .clear_sq = &qed_nvmetcp_clear_conn_sq,809 .add_src_tcp_port_filter = &qed_llh_add_src_tcp_port_filter,810 .remove_src_tcp_port_filter = &qed_llh_remove_src_tcp_port_filter,811 .add_dst_tcp_port_filter = &qed_llh_add_dst_tcp_port_filter,812 .remove_dst_tcp_port_filter = &qed_llh_remove_dst_tcp_port_filter,813 .clear_all_filters = &qed_llh_clear_all_filters,814 .init_read_io = &init_nvmetcp_host_read_task,815 .init_write_io = &init_nvmetcp_host_write_task,816 .init_icreq_exchange = &init_nvmetcp_init_conn_req_task,817 .init_task_cleanup = &init_cleanup_task_nvmetcp818};819 820const struct qed_nvmetcp_ops *qed_get_nvmetcp_ops(void)821{822 return &qed_nvmetcp_ops_pass;823}824EXPORT_SYMBOL(qed_get_nvmetcp_ops);825 826void qed_put_nvmetcp_ops(void)827{828}829EXPORT_SYMBOL(qed_put_nvmetcp_ops);830