diff options
Diffstat (limited to 'drivers/infiniband/hw/bnxt_re/qplib_rcfw.c')
| -rw-r--r-- | drivers/infiniband/hw/bnxt_re/qplib_rcfw.c | 892 |
1 files changed, 892 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c new file mode 100644 index 000000000..75e0c42f6 --- /dev/null +++ b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c @@ -0,0 +1,892 @@ +/* + * Broadcom NetXtreme-E RoCE driver. + * + * Copyright (c) 2016 - 2017, Broadcom. All rights reserved. The term + * Broadcom refers to Broadcom Limited and/or its subsidiaries. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * BSD license below: + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE + * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN + * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Description: RDMA Controller HW interface + */ + +#define dev_fmt(fmt) "QPLIB: " fmt + +#include <linux/interrupt.h> +#include <linux/spinlock.h> +#include <linux/pci.h> +#include <linux/prefetch.h> +#include <linux/delay.h> + +#include "roce_hsi.h" +#include "qplib_res.h" +#include "qplib_rcfw.h" +#include "qplib_sp.h" +#include "qplib_fp.h" + +static void bnxt_qplib_service_creq(struct tasklet_struct *t); + +/* Hardware communication channel */ +static int __wait_for_resp(struct bnxt_qplib_rcfw *rcfw, u16 cookie) +{ + struct bnxt_qplib_cmdq_ctx *cmdq; + u16 cbit; + int rc; + + cmdq = &rcfw->cmdq; + cbit = cookie % rcfw->cmdq_depth; + rc = wait_event_timeout(cmdq->waitq, + !test_bit(cbit, cmdq->cmdq_bitmap), + msecs_to_jiffies(RCFW_CMD_WAIT_TIME_MS)); + return rc ? 0 : -ETIMEDOUT; +}; + +static int __block_for_resp(struct bnxt_qplib_rcfw *rcfw, u16 cookie) +{ + u32 count = RCFW_BLOCKED_CMD_WAIT_COUNT; + struct bnxt_qplib_cmdq_ctx *cmdq; + u16 cbit; + + cmdq = &rcfw->cmdq; + cbit = cookie % rcfw->cmdq_depth; + if (!test_bit(cbit, cmdq->cmdq_bitmap)) + goto done; + do { + udelay(1); + bnxt_qplib_service_creq(&rcfw->creq.creq_tasklet); + } while (test_bit(cbit, cmdq->cmdq_bitmap) && --count); +done: + return count ? 0 : -ETIMEDOUT; +}; + +static int __send_message(struct bnxt_qplib_rcfw *rcfw, struct cmdq_base *req, + struct creq_base *resp, void *sb, u8 is_block) +{ + struct bnxt_qplib_cmdq_ctx *cmdq = &rcfw->cmdq; + struct bnxt_qplib_hwq *hwq = &cmdq->hwq; + struct bnxt_qplib_crsqe *crsqe; + struct bnxt_qplib_cmdqe *cmdqe; + u32 sw_prod, cmdq_prod; + struct pci_dev *pdev; + unsigned long flags; + u32 size, opcode; + u16 cookie, cbit; + u8 *preq; + + pdev = rcfw->pdev; + + opcode = req->opcode; + if (!test_bit(FIRMWARE_INITIALIZED_FLAG, &cmdq->flags) && + (opcode != CMDQ_BASE_OPCODE_QUERY_FUNC && + opcode != CMDQ_BASE_OPCODE_INITIALIZE_FW && + opcode != CMDQ_BASE_OPCODE_QUERY_VERSION)) { + dev_err(&pdev->dev, + "RCFW not initialized, reject opcode 0x%x\n", opcode); + return -EINVAL; + } + + if (test_bit(FIRMWARE_INITIALIZED_FLAG, &cmdq->flags) && + opcode == CMDQ_BASE_OPCODE_INITIALIZE_FW) { + dev_err(&pdev->dev, "RCFW already initialized!\n"); + return -EINVAL; + } + + if (test_bit(FIRMWARE_TIMED_OUT, &cmdq->flags)) + return -ETIMEDOUT; + + /* Cmdq are in 16-byte units, each request can consume 1 or more + * cmdqe + */ + spin_lock_irqsave(&hwq->lock, flags); + if (req->cmd_size >= HWQ_FREE_SLOTS(hwq)) { + dev_err(&pdev->dev, "RCFW: CMDQ is full!\n"); + spin_unlock_irqrestore(&hwq->lock, flags); + return -EAGAIN; + } + + + cookie = cmdq->seq_num & RCFW_MAX_COOKIE_VALUE; + cbit = cookie % rcfw->cmdq_depth; + if (is_block) + cookie |= RCFW_CMD_IS_BLOCKING; + + set_bit(cbit, cmdq->cmdq_bitmap); + req->cookie = cpu_to_le16(cookie); + crsqe = &rcfw->crsqe_tbl[cbit]; + if (crsqe->resp) { + spin_unlock_irqrestore(&hwq->lock, flags); + return -EBUSY; + } + + size = req->cmd_size; + /* change the cmd_size to the number of 16byte cmdq unit. + * req->cmd_size is modified here + */ + bnxt_qplib_set_cmd_slots(req); + + memset(resp, 0, sizeof(*resp)); + crsqe->resp = (struct creq_qp_event *)resp; + crsqe->resp->cookie = req->cookie; + crsqe->req_size = req->cmd_size; + if (req->resp_size && sb) { + struct bnxt_qplib_rcfw_sbuf *sbuf = sb; + + req->resp_addr = cpu_to_le64(sbuf->dma_addr); + req->resp_size = (sbuf->size + BNXT_QPLIB_CMDQE_UNITS - 1) / + BNXT_QPLIB_CMDQE_UNITS; + } + + preq = (u8 *)req; + do { + /* Locate the next cmdq slot */ + sw_prod = HWQ_CMP(hwq->prod, hwq); + cmdqe = bnxt_qplib_get_qe(hwq, sw_prod, NULL); + if (!cmdqe) { + dev_err(&pdev->dev, + "RCFW request failed with no cmdqe!\n"); + goto done; + } + /* Copy a segment of the req cmd to the cmdq */ + memset(cmdqe, 0, sizeof(*cmdqe)); + memcpy(cmdqe, preq, min_t(u32, size, sizeof(*cmdqe))); + preq += min_t(u32, size, sizeof(*cmdqe)); + size -= min_t(u32, size, sizeof(*cmdqe)); + hwq->prod++; + } while (size > 0); + cmdq->seq_num++; + + cmdq_prod = hwq->prod & 0xFFFF; + if (test_bit(FIRMWARE_FIRST_FLAG, &cmdq->flags)) { + /* The very first doorbell write + * is required to set this flag + * which prompts the FW to reset + * its internal pointers + */ + cmdq_prod |= BIT(FIRMWARE_FIRST_FLAG); + clear_bit(FIRMWARE_FIRST_FLAG, &cmdq->flags); + } + + /* ring CMDQ DB */ + wmb(); + writel(cmdq_prod, cmdq->cmdq_mbox.prod); + writel(RCFW_CMDQ_TRIG_VAL, cmdq->cmdq_mbox.db); +done: + spin_unlock_irqrestore(&hwq->lock, flags); + /* Return the CREQ response pointer */ + return 0; +} + +int bnxt_qplib_rcfw_send_message(struct bnxt_qplib_rcfw *rcfw, + struct cmdq_base *req, + struct creq_base *resp, + void *sb, u8 is_block) +{ + struct creq_qp_event *evnt = (struct creq_qp_event *)resp; + u16 cookie; + u8 opcode, retry_cnt = 0xFF; + int rc = 0; + + /* Prevent posting if f/w is not in a state to process */ + if (test_bit(ERR_DEVICE_DETACHED, &rcfw->cmdq.flags)) + return 0; + + do { + opcode = req->opcode; + rc = __send_message(rcfw, req, resp, sb, is_block); + cookie = le16_to_cpu(req->cookie) & RCFW_MAX_COOKIE_VALUE; + if (!rc) + break; + + if (!retry_cnt || (rc != -EAGAIN && rc != -EBUSY)) { + /* send failed */ + dev_err(&rcfw->pdev->dev, "cmdq[%#x]=%#x send failed\n", + cookie, opcode); + return rc; + } + is_block ? mdelay(1) : usleep_range(500, 1000); + + } while (retry_cnt--); + + if (is_block) + rc = __block_for_resp(rcfw, cookie); + else + rc = __wait_for_resp(rcfw, cookie); + if (rc) { + /* timed out */ + dev_err(&rcfw->pdev->dev, "cmdq[%#x]=%#x timedout (%d)msec\n", + cookie, opcode, RCFW_CMD_WAIT_TIME_MS); + set_bit(FIRMWARE_TIMED_OUT, &rcfw->cmdq.flags); + return rc; + } + + if (evnt->status) { + /* failed with status */ + dev_err(&rcfw->pdev->dev, "cmdq[%#x]=%#x status %#x\n", + cookie, opcode, evnt->status); + rc = -EFAULT; + } + + return rc; +} +/* Completions */ +static int bnxt_qplib_process_func_event(struct bnxt_qplib_rcfw *rcfw, + struct creq_func_event *func_event) +{ + int rc; + + switch (func_event->event) { + case CREQ_FUNC_EVENT_EVENT_TX_WQE_ERROR: + break; + case CREQ_FUNC_EVENT_EVENT_TX_DATA_ERROR: + break; + case CREQ_FUNC_EVENT_EVENT_RX_WQE_ERROR: + break; + case CREQ_FUNC_EVENT_EVENT_RX_DATA_ERROR: + break; + case CREQ_FUNC_EVENT_EVENT_CQ_ERROR: + break; + case CREQ_FUNC_EVENT_EVENT_TQM_ERROR: + break; + case CREQ_FUNC_EVENT_EVENT_CFCQ_ERROR: + break; + case CREQ_FUNC_EVENT_EVENT_CFCS_ERROR: + /* SRQ ctx error, call srq_handler?? + * But there's no SRQ handle! + */ + break; + case CREQ_FUNC_EVENT_EVENT_CFCC_ERROR: + break; + case CREQ_FUNC_EVENT_EVENT_CFCM_ERROR: + break; + case CREQ_FUNC_EVENT_EVENT_TIM_ERROR: + break; + case CREQ_FUNC_EVENT_EVENT_VF_COMM_REQUEST: + break; + case CREQ_FUNC_EVENT_EVENT_RESOURCE_EXHAUSTED: + break; + default: + return -EINVAL; + } + + rc = rcfw->creq.aeq_handler(rcfw, (void *)func_event, NULL); + return rc; +} + +static int bnxt_qplib_process_qp_event(struct bnxt_qplib_rcfw *rcfw, + struct creq_qp_event *qp_event, + u32 *num_wait) +{ + struct creq_qp_error_notification *err_event; + struct bnxt_qplib_hwq *hwq = &rcfw->cmdq.hwq; + struct bnxt_qplib_crsqe *crsqe; + struct bnxt_qplib_qp *qp; + u16 cbit, blocked = 0; + struct pci_dev *pdev; + unsigned long flags; + u32 wait_cmds = 0; + __le16 mcookie; + u16 cookie; + int rc = 0; + u32 qp_id, tbl_indx; + + pdev = rcfw->pdev; + switch (qp_event->event) { + case CREQ_QP_EVENT_EVENT_QP_ERROR_NOTIFICATION: + err_event = (struct creq_qp_error_notification *)qp_event; + qp_id = le32_to_cpu(err_event->xid); + tbl_indx = map_qp_id_to_tbl_indx(qp_id, rcfw); + qp = rcfw->qp_tbl[tbl_indx].qp_handle; + dev_dbg(&pdev->dev, "Received QP error notification\n"); + dev_dbg(&pdev->dev, + "qpid 0x%x, req_err=0x%x, resp_err=0x%x\n", + qp_id, err_event->req_err_state_reason, + err_event->res_err_state_reason); + if (!qp) + break; + bnxt_qplib_mark_qp_error(qp); + rc = rcfw->creq.aeq_handler(rcfw, qp_event, qp); + break; + default: + /* + * Command Response + * cmdq->lock needs to be acquired to synchronie + * the command send and completion reaping. This function + * is always called with creq->lock held. Using + * the nested variant of spin_lock. + * + */ + + spin_lock_irqsave_nested(&hwq->lock, flags, + SINGLE_DEPTH_NESTING); + cookie = le16_to_cpu(qp_event->cookie); + mcookie = qp_event->cookie; + blocked = cookie & RCFW_CMD_IS_BLOCKING; + cookie &= RCFW_MAX_COOKIE_VALUE; + cbit = cookie % rcfw->cmdq_depth; + crsqe = &rcfw->crsqe_tbl[cbit]; + if (crsqe->resp && + crsqe->resp->cookie == mcookie) { + memcpy(crsqe->resp, qp_event, sizeof(*qp_event)); + crsqe->resp = NULL; + } else { + if (crsqe->resp && crsqe->resp->cookie) + dev_err(&pdev->dev, + "CMD %s cookie sent=%#x, recd=%#x\n", + crsqe->resp ? "mismatch" : "collision", + crsqe->resp ? crsqe->resp->cookie : 0, + mcookie); + } + if (!test_and_clear_bit(cbit, rcfw->cmdq.cmdq_bitmap)) + dev_warn(&pdev->dev, + "CMD bit %d was not requested\n", cbit); + hwq->cons += crsqe->req_size; + crsqe->req_size = 0; + + if (!blocked) + wait_cmds++; + spin_unlock_irqrestore(&hwq->lock, flags); + } + *num_wait += wait_cmds; + return rc; +} + +/* SP - CREQ Completion handlers */ +static void bnxt_qplib_service_creq(struct tasklet_struct *t) +{ + struct bnxt_qplib_rcfw *rcfw = from_tasklet(rcfw, t, creq.creq_tasklet); + struct bnxt_qplib_creq_ctx *creq = &rcfw->creq; + u32 type, budget = CREQ_ENTRY_POLL_BUDGET; + struct bnxt_qplib_hwq *hwq = &creq->hwq; + struct creq_base *creqe; + u32 sw_cons, raw_cons; + unsigned long flags; + u32 num_wakeup = 0; + + /* Service the CREQ until budget is over */ + spin_lock_irqsave(&hwq->lock, flags); + raw_cons = hwq->cons; + while (budget > 0) { + sw_cons = HWQ_CMP(raw_cons, hwq); + creqe = bnxt_qplib_get_qe(hwq, sw_cons, NULL); + if (!CREQ_CMP_VALID(creqe, raw_cons, hwq->max_elements)) + break; + /* The valid test of the entry must be done first before + * reading any further. + */ + dma_rmb(); + + type = creqe->type & CREQ_BASE_TYPE_MASK; + switch (type) { + case CREQ_BASE_TYPE_QP_EVENT: + bnxt_qplib_process_qp_event + (rcfw, (struct creq_qp_event *)creqe, + &num_wakeup); + creq->stats.creq_qp_event_processed++; + break; + case CREQ_BASE_TYPE_FUNC_EVENT: + if (!bnxt_qplib_process_func_event + (rcfw, (struct creq_func_event *)creqe)) + creq->stats.creq_func_event_processed++; + else + dev_warn(&rcfw->pdev->dev, + "aeqe:%#x Not handled\n", type); + break; + default: + if (type != ASYNC_EVENT_CMPL_TYPE_HWRM_ASYNC_EVENT) + dev_warn(&rcfw->pdev->dev, + "creqe with event 0x%x not handled\n", + type); + break; + } + raw_cons++; + budget--; + } + + if (hwq->cons != raw_cons) { + hwq->cons = raw_cons; + bnxt_qplib_ring_nq_db(&creq->creq_db.dbinfo, + rcfw->res->cctx, true); + } + spin_unlock_irqrestore(&hwq->lock, flags); + if (num_wakeup) + wake_up_nr(&rcfw->cmdq.waitq, num_wakeup); +} + +static irqreturn_t bnxt_qplib_creq_irq(int irq, void *dev_instance) +{ + struct bnxt_qplib_rcfw *rcfw = dev_instance; + struct bnxt_qplib_creq_ctx *creq; + struct bnxt_qplib_hwq *hwq; + u32 sw_cons; + + creq = &rcfw->creq; + hwq = &creq->hwq; + /* Prefetch the CREQ element */ + sw_cons = HWQ_CMP(hwq->cons, hwq); + prefetch(bnxt_qplib_get_qe(hwq, sw_cons, NULL)); + + tasklet_schedule(&creq->creq_tasklet); + + return IRQ_HANDLED; +} + +/* RCFW */ +int bnxt_qplib_deinit_rcfw(struct bnxt_qplib_rcfw *rcfw) +{ + struct cmdq_deinitialize_fw req; + struct creq_deinitialize_fw_resp resp; + u16 cmd_flags = 0; + int rc; + + RCFW_CMD_PREP(req, DEINITIALIZE_FW, cmd_flags); + rc = bnxt_qplib_rcfw_send_message(rcfw, (void *)&req, (void *)&resp, + NULL, 0); + if (rc) + return rc; + + clear_bit(FIRMWARE_INITIALIZED_FLAG, &rcfw->cmdq.flags); + return 0; +} + +int bnxt_qplib_init_rcfw(struct bnxt_qplib_rcfw *rcfw, + struct bnxt_qplib_ctx *ctx, int is_virtfn) +{ + struct creq_initialize_fw_resp resp; + struct cmdq_initialize_fw req; + u16 cmd_flags = 0; + u8 pgsz, lvl; + int rc; + + RCFW_CMD_PREP(req, INITIALIZE_FW, cmd_flags); + /* Supply (log-base-2-of-host-page-size - base-page-shift) + * to bono to adjust the doorbell page sizes. + */ + req.log2_dbr_pg_size = cpu_to_le16(PAGE_SHIFT - + RCFW_DBR_BASE_PAGE_SHIFT); + /* + * Gen P5 devices doesn't require this allocation + * as the L2 driver does the same for RoCE also. + * Also, VFs need not setup the HW context area, PF + * shall setup this area for VF. Skipping the + * HW programming + */ + if (is_virtfn) + goto skip_ctx_setup; + if (bnxt_qplib_is_chip_gen_p5(rcfw->res->cctx)) + goto config_vf_res; + + lvl = ctx->qpc_tbl.level; + pgsz = bnxt_qplib_base_pg_size(&ctx->qpc_tbl); + req.qpc_pg_size_qpc_lvl = (pgsz << CMDQ_INITIALIZE_FW_QPC_PG_SIZE_SFT) | + lvl; + lvl = ctx->mrw_tbl.level; + pgsz = bnxt_qplib_base_pg_size(&ctx->mrw_tbl); + req.mrw_pg_size_mrw_lvl = (pgsz << CMDQ_INITIALIZE_FW_QPC_PG_SIZE_SFT) | + lvl; + lvl = ctx->srqc_tbl.level; + pgsz = bnxt_qplib_base_pg_size(&ctx->srqc_tbl); + req.srq_pg_size_srq_lvl = (pgsz << CMDQ_INITIALIZE_FW_QPC_PG_SIZE_SFT) | + lvl; + lvl = ctx->cq_tbl.level; + pgsz = bnxt_qplib_base_pg_size(&ctx->cq_tbl); + req.cq_pg_size_cq_lvl = (pgsz << CMDQ_INITIALIZE_FW_QPC_PG_SIZE_SFT) | + lvl; + lvl = ctx->tim_tbl.level; + pgsz = bnxt_qplib_base_pg_size(&ctx->tim_tbl); + req.tim_pg_size_tim_lvl = (pgsz << CMDQ_INITIALIZE_FW_QPC_PG_SIZE_SFT) | + lvl; + lvl = ctx->tqm_ctx.pde.level; + pgsz = bnxt_qplib_base_pg_size(&ctx->tqm_ctx.pde); + req.tqm_pg_size_tqm_lvl = (pgsz << CMDQ_INITIALIZE_FW_QPC_PG_SIZE_SFT) | + lvl; + req.qpc_page_dir = + cpu_to_le64(ctx->qpc_tbl.pbl[PBL_LVL_0].pg_map_arr[0]); + req.mrw_page_dir = + cpu_to_le64(ctx->mrw_tbl.pbl[PBL_LVL_0].pg_map_arr[0]); + req.srq_page_dir = + cpu_to_le64(ctx->srqc_tbl.pbl[PBL_LVL_0].pg_map_arr[0]); + req.cq_page_dir = + cpu_to_le64(ctx->cq_tbl.pbl[PBL_LVL_0].pg_map_arr[0]); + req.tim_page_dir = + cpu_to_le64(ctx->tim_tbl.pbl[PBL_LVL_0].pg_map_arr[0]); + req.tqm_page_dir = + cpu_to_le64(ctx->tqm_ctx.pde.pbl[PBL_LVL_0].pg_map_arr[0]); + + req.number_of_qp = cpu_to_le32(ctx->qpc_tbl.max_elements); + req.number_of_mrw = cpu_to_le32(ctx->mrw_tbl.max_elements); + req.number_of_srq = cpu_to_le32(ctx->srqc_tbl.max_elements); + req.number_of_cq = cpu_to_le32(ctx->cq_tbl.max_elements); + +config_vf_res: + req.max_qp_per_vf = cpu_to_le32(ctx->vf_res.max_qp_per_vf); + req.max_mrw_per_vf = cpu_to_le32(ctx->vf_res.max_mrw_per_vf); + req.max_srq_per_vf = cpu_to_le32(ctx->vf_res.max_srq_per_vf); + req.max_cq_per_vf = cpu_to_le32(ctx->vf_res.max_cq_per_vf); + req.max_gid_per_vf = cpu_to_le32(ctx->vf_res.max_gid_per_vf); + +skip_ctx_setup: + req.stat_ctx_id = cpu_to_le32(ctx->stats.fw_id); + rc = bnxt_qplib_rcfw_send_message(rcfw, (void *)&req, (void *)&resp, + NULL, 0); + if (rc) + return rc; + set_bit(FIRMWARE_INITIALIZED_FLAG, &rcfw->cmdq.flags); + return 0; +} + +void bnxt_qplib_free_rcfw_channel(struct bnxt_qplib_rcfw *rcfw) +{ + bitmap_free(rcfw->cmdq.cmdq_bitmap); + kfree(rcfw->qp_tbl); + kfree(rcfw->crsqe_tbl); + bnxt_qplib_free_hwq(rcfw->res, &rcfw->cmdq.hwq); + bnxt_qplib_free_hwq(rcfw->res, &rcfw->creq.hwq); + rcfw->pdev = NULL; +} + +int bnxt_qplib_alloc_rcfw_channel(struct bnxt_qplib_res *res, + struct bnxt_qplib_rcfw *rcfw, + struct bnxt_qplib_ctx *ctx, + int qp_tbl_sz) +{ + struct bnxt_qplib_hwq_attr hwq_attr = {}; + struct bnxt_qplib_sg_info sginfo = {}; + struct bnxt_qplib_cmdq_ctx *cmdq; + struct bnxt_qplib_creq_ctx *creq; + + rcfw->pdev = res->pdev; + cmdq = &rcfw->cmdq; + creq = &rcfw->creq; + rcfw->res = res; + + sginfo.pgsize = PAGE_SIZE; + sginfo.pgshft = PAGE_SHIFT; + + hwq_attr.sginfo = &sginfo; + hwq_attr.res = rcfw->res; + hwq_attr.depth = BNXT_QPLIB_CREQE_MAX_CNT; + hwq_attr.stride = BNXT_QPLIB_CREQE_UNITS; + hwq_attr.type = bnxt_qplib_get_hwq_type(res); + + if (bnxt_qplib_alloc_init_hwq(&creq->hwq, &hwq_attr)) { + dev_err(&rcfw->pdev->dev, + "HW channel CREQ allocation failed\n"); + goto fail; + } + if (ctx->hwrm_intf_ver < HWRM_VERSION_RCFW_CMDQ_DEPTH_CHECK) + rcfw->cmdq_depth = BNXT_QPLIB_CMDQE_MAX_CNT_256; + else + rcfw->cmdq_depth = BNXT_QPLIB_CMDQE_MAX_CNT_8192; + + sginfo.pgsize = bnxt_qplib_cmdqe_page_size(rcfw->cmdq_depth); + hwq_attr.depth = rcfw->cmdq_depth & 0x7FFFFFFF; + hwq_attr.stride = BNXT_QPLIB_CMDQE_UNITS; + hwq_attr.type = HWQ_TYPE_CTX; + if (bnxt_qplib_alloc_init_hwq(&cmdq->hwq, &hwq_attr)) { + dev_err(&rcfw->pdev->dev, + "HW channel CMDQ allocation failed\n"); + goto fail; + } + + rcfw->crsqe_tbl = kcalloc(cmdq->hwq.max_elements, + sizeof(*rcfw->crsqe_tbl), GFP_KERNEL); + if (!rcfw->crsqe_tbl) + goto fail; + + cmdq->cmdq_bitmap = bitmap_zalloc(rcfw->cmdq_depth, GFP_KERNEL); + if (!cmdq->cmdq_bitmap) + goto fail; + + /* Allocate one extra to hold the QP1 entries */ + rcfw->qp_tbl_size = qp_tbl_sz + 1; + rcfw->qp_tbl = kcalloc(rcfw->qp_tbl_size, sizeof(struct bnxt_qplib_qp_node), + GFP_KERNEL); + if (!rcfw->qp_tbl) + goto fail; + + return 0; + +fail: + bnxt_qplib_free_rcfw_channel(rcfw); + return -ENOMEM; +} + +void bnxt_qplib_rcfw_stop_irq(struct bnxt_qplib_rcfw *rcfw, bool kill) +{ + struct bnxt_qplib_creq_ctx *creq; + + creq = &rcfw->creq; + + if (!creq->requested) + return; + + tasklet_disable(&creq->creq_tasklet); + /* Mask h/w interrupts */ + bnxt_qplib_ring_nq_db(&creq->creq_db.dbinfo, rcfw->res->cctx, false); + /* Sync with last running IRQ-handler */ + synchronize_irq(creq->msix_vec); + if (kill) + tasklet_kill(&creq->creq_tasklet); + + free_irq(creq->msix_vec, rcfw); + kfree(creq->irq_name); + creq->irq_name = NULL; + creq->requested = false; +} + +void bnxt_qplib_disable_rcfw_channel(struct bnxt_qplib_rcfw *rcfw) +{ + struct bnxt_qplib_creq_ctx *creq; + struct bnxt_qplib_cmdq_ctx *cmdq; + unsigned long indx; + + creq = &rcfw->creq; + cmdq = &rcfw->cmdq; + /* Make sure the HW channel is stopped! */ + bnxt_qplib_rcfw_stop_irq(rcfw, true); + + iounmap(cmdq->cmdq_mbox.reg.bar_reg); + iounmap(creq->creq_db.reg.bar_reg); + + indx = find_first_bit(cmdq->cmdq_bitmap, rcfw->cmdq_depth); + if (indx != rcfw->cmdq_depth) + dev_err(&rcfw->pdev->dev, + "disabling RCFW with pending cmd-bit %lx\n", indx); + + cmdq->cmdq_mbox.reg.bar_reg = NULL; + creq->creq_db.reg.bar_reg = NULL; + creq->aeq_handler = NULL; + creq->msix_vec = 0; +} + +int bnxt_qplib_rcfw_start_irq(struct bnxt_qplib_rcfw *rcfw, int msix_vector, + bool need_init) +{ + struct bnxt_qplib_creq_ctx *creq; + struct bnxt_qplib_res *res; + int rc; + + creq = &rcfw->creq; + res = rcfw->res; + + if (creq->requested) + return -EFAULT; + + creq->msix_vec = msix_vector; + if (need_init) + tasklet_setup(&creq->creq_tasklet, bnxt_qplib_service_creq); + else + tasklet_enable(&creq->creq_tasklet); + + creq->irq_name = kasprintf(GFP_KERNEL, "bnxt_re-creq@pci:%s", + pci_name(res->pdev)); + if (!creq->irq_name) + return -ENOMEM; + rc = request_irq(creq->msix_vec, bnxt_qplib_creq_irq, 0, + creq->irq_name, rcfw); + if (rc) { + kfree(creq->irq_name); + creq->irq_name = NULL; + tasklet_disable(&creq->creq_tasklet); + return rc; + } + creq->requested = true; + + bnxt_qplib_ring_nq_db(&creq->creq_db.dbinfo, res->cctx, true); + + return 0; +} + +static int bnxt_qplib_map_cmdq_mbox(struct bnxt_qplib_rcfw *rcfw, bool is_vf) +{ + struct bnxt_qplib_cmdq_mbox *mbox; + resource_size_t bar_reg; + struct pci_dev *pdev; + u16 prod_offt; + int rc = 0; + + pdev = rcfw->pdev; + mbox = &rcfw->cmdq.cmdq_mbox; + + mbox->reg.bar_id = RCFW_COMM_PCI_BAR_REGION; + mbox->reg.len = RCFW_COMM_SIZE; + mbox->reg.bar_base = pci_resource_start(pdev, mbox->reg.bar_id); + if (!mbox->reg.bar_base) { + dev_err(&pdev->dev, + "QPLIB: CMDQ BAR region %d resc start is 0!\n", + mbox->reg.bar_id); + return -ENOMEM; + } + + bar_reg = mbox->reg.bar_base + RCFW_COMM_BASE_OFFSET; + mbox->reg.len = RCFW_COMM_SIZE; + mbox->reg.bar_reg = ioremap(bar_reg, mbox->reg.len); + if (!mbox->reg.bar_reg) { + dev_err(&pdev->dev, + "QPLIB: CMDQ BAR region %d mapping failed\n", + mbox->reg.bar_id); + return -ENOMEM; + } + + prod_offt = is_vf ? RCFW_VF_COMM_PROD_OFFSET : + RCFW_PF_COMM_PROD_OFFSET; + mbox->prod = (void __iomem *)(mbox->reg.bar_reg + prod_offt); + mbox->db = (void __iomem *)(mbox->reg.bar_reg + RCFW_COMM_TRIG_OFFSET); + return rc; +} + +static int bnxt_qplib_map_creq_db(struct bnxt_qplib_rcfw *rcfw, u32 reg_offt) +{ + struct bnxt_qplib_creq_db *creq_db; + resource_size_t bar_reg; + struct pci_dev *pdev; + + pdev = rcfw->pdev; + creq_db = &rcfw->creq.creq_db; + + creq_db->reg.bar_id = RCFW_COMM_CONS_PCI_BAR_REGION; + creq_db->reg.bar_base = pci_resource_start(pdev, creq_db->reg.bar_id); + if (!creq_db->reg.bar_id) + dev_err(&pdev->dev, + "QPLIB: CREQ BAR region %d resc start is 0!", + creq_db->reg.bar_id); + + bar_reg = creq_db->reg.bar_base + reg_offt; + /* Unconditionally map 8 bytes to support 57500 series */ + creq_db->reg.len = 8; + creq_db->reg.bar_reg = ioremap(bar_reg, creq_db->reg.len); + if (!creq_db->reg.bar_reg) { + dev_err(&pdev->dev, + "QPLIB: CREQ BAR region %d mapping failed", + creq_db->reg.bar_id); + return -ENOMEM; + } + creq_db->dbinfo.db = creq_db->reg.bar_reg; + creq_db->dbinfo.hwq = &rcfw->creq.hwq; + creq_db->dbinfo.xid = rcfw->creq.ring_id; + return 0; +} + +static void bnxt_qplib_start_rcfw(struct bnxt_qplib_rcfw *rcfw) +{ + struct bnxt_qplib_cmdq_ctx *cmdq; + struct bnxt_qplib_creq_ctx *creq; + struct bnxt_qplib_cmdq_mbox *mbox; + struct cmdq_init init = {0}; + + cmdq = &rcfw->cmdq; + creq = &rcfw->creq; + mbox = &cmdq->cmdq_mbox; + + init.cmdq_pbl = cpu_to_le64(cmdq->hwq.pbl[PBL_LVL_0].pg_map_arr[0]); + init.cmdq_size_cmdq_lvl = + cpu_to_le16(((rcfw->cmdq_depth << + CMDQ_INIT_CMDQ_SIZE_SFT) & + CMDQ_INIT_CMDQ_SIZE_MASK) | + ((cmdq->hwq.level << + CMDQ_INIT_CMDQ_LVL_SFT) & + CMDQ_INIT_CMDQ_LVL_MASK)); + init.creq_ring_id = cpu_to_le16(creq->ring_id); + /* Write to the Bono mailbox register */ + __iowrite32_copy(mbox->reg.bar_reg, &init, sizeof(init) / 4); +} + +int bnxt_qplib_enable_rcfw_channel(struct bnxt_qplib_rcfw *rcfw, + int msix_vector, + int cp_bar_reg_off, int virt_fn, + aeq_handler_t aeq_handler) +{ + struct bnxt_qplib_cmdq_ctx *cmdq; + struct bnxt_qplib_creq_ctx *creq; + int rc; + + cmdq = &rcfw->cmdq; + creq = &rcfw->creq; + + /* Clear to defaults */ + + cmdq->seq_num = 0; + set_bit(FIRMWARE_FIRST_FLAG, &cmdq->flags); + init_waitqueue_head(&cmdq->waitq); + + creq->stats.creq_qp_event_processed = 0; + creq->stats.creq_func_event_processed = 0; + creq->aeq_handler = aeq_handler; + + rc = bnxt_qplib_map_cmdq_mbox(rcfw, virt_fn); + if (rc) + return rc; + + rc = bnxt_qplib_map_creq_db(rcfw, cp_bar_reg_off); + if (rc) + return rc; + + rc = bnxt_qplib_rcfw_start_irq(rcfw, msix_vector, true); + if (rc) { + dev_err(&rcfw->pdev->dev, + "Failed to request IRQ for CREQ rc = 0x%x\n", rc); + bnxt_qplib_disable_rcfw_channel(rcfw); + return rc; + } + + bnxt_qplib_start_rcfw(rcfw); + + return 0; +} + +struct bnxt_qplib_rcfw_sbuf *bnxt_qplib_rcfw_alloc_sbuf( + struct bnxt_qplib_rcfw *rcfw, + u32 size) +{ + struct bnxt_qplib_rcfw_sbuf *sbuf; + + sbuf = kzalloc(sizeof(*sbuf), GFP_KERNEL); + if (!sbuf) + return NULL; + + sbuf->size = size; + sbuf->sb = dma_alloc_coherent(&rcfw->pdev->dev, sbuf->size, + &sbuf->dma_addr, GFP_KERNEL); + if (!sbuf->sb) + goto bail; + + return sbuf; +bail: + kfree(sbuf); + return NULL; +} + +void bnxt_qplib_rcfw_free_sbuf(struct bnxt_qplib_rcfw *rcfw, + struct bnxt_qplib_rcfw_sbuf *sbuf) +{ + if (sbuf->sb) + dma_free_coherent(&rcfw->pdev->dev, sbuf->size, + sbuf->sb, sbuf->dma_addr); + kfree(sbuf); +} |