From 7ef37fe4c1a156a394174bd1b5d849cef2b8b4fa Mon Sep 17 00:00:00 2001 From: Aviad Krawczyk Date: Mon, 21 Aug 2017 23:56:03 +0800 Subject: [PATCH] net-next/hinic: Add cmdq completion handler Add cmdq completion handler for getting a notification about the completion of cmdq commands. Signed-off-by: Aviad Krawczyk Signed-off-by: Zhao Chen Signed-off-by: David S. Miller --- drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c | 297 +++++++++++++++++++++- drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.h | 12 + 2 files changed, 308 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c b/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c index 07ce787..7d95f08 100644 --- a/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c +++ b/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c @@ -40,12 +40,31 @@ #include "hinic_hw_io.h" #include "hinic_hw_dev.h" +#define CMDQ_CEQE_TYPE_SHIFT 0 + +#define CMDQ_CEQE_TYPE_MASK 0x7 + +#define CMDQ_CEQE_GET(val, member) \ + (((val) >> CMDQ_CEQE_##member##_SHIFT) \ + & CMDQ_CEQE_##member##_MASK) + +#define CMDQ_WQE_ERRCODE_VAL_SHIFT 20 + +#define CMDQ_WQE_ERRCODE_VAL_MASK 0xF + +#define CMDQ_WQE_ERRCODE_GET(val, member) \ + (((val) >> CMDQ_WQE_ERRCODE_##member##_SHIFT) \ + & CMDQ_WQE_ERRCODE_##member##_MASK) + #define CMDQ_DB_PI_OFF(pi) (((u16)LOWER_8_BITS(pi)) << 3) #define CMDQ_DB_ADDR(db_base, pi) ((db_base) + CMDQ_DB_PI_OFF(pi)) #define CMDQ_WQE_HEADER(wqe) ((struct hinic_cmdq_header *)(wqe)) +#define CMDQ_WQE_COMPLETED(ctrl_info) \ + HINIC_CMDQ_CTRL_GET(ctrl_info, HW_BUSY_BIT) + #define FIRST_DATA_TO_WRITE_LAST sizeof(u64) #define CMDQ_DB_OFF SZ_2K @@ -145,6 +164,22 @@ void hinic_free_cmdq_buf(struct hinic_cmdqs *cmdqs, pci_pool_free(cmdqs->cmdq_buf_pool, cmdq_buf->buf, cmdq_buf->dma_addr); } +static unsigned int cmdq_wqe_size_from_bdlen(enum bufdesc_len len) +{ + unsigned int wqe_size = 0; + + switch (len) { + case BUFDESC_LCMD_LEN: + wqe_size = WQE_LCMD_SIZE; + break; + case BUFDESC_SCMD_LEN: + wqe_size = WQE_SCMD_SIZE; + break; + } + + return wqe_size; +} + static void cmdq_set_sge_completion(struct hinic_cmdq_completion *completion, struct hinic_cmdq_buf *buf_out) { @@ -210,6 +245,15 @@ static void cmdq_set_lcmd_bufdesc(struct hinic_cmdq_wqe_lcmd *wqe_lcmd, hinic_set_sge(&wqe_lcmd->buf_desc.sge, buf_in->dma_addr, buf_in->size); } +static void cmdq_set_direct_wqe_data(struct hinic_cmdq_direct_wqe *wqe, + void *buf_in, u32 in_size) +{ + struct hinic_cmdq_wqe_scmd *wqe_scmd = &wqe->wqe_scmd; + + wqe_scmd->buf_desc.buf_len = in_size; + memcpy(wqe_scmd->buf_desc.data, buf_in, in_size); +} + static void cmdq_set_lcmd_wqe(struct hinic_cmdq_wqe *wqe, enum cmdq_cmd_type cmd_type, struct hinic_cmdq_buf *buf_in, @@ -238,6 +282,36 @@ static void cmdq_set_lcmd_wqe(struct hinic_cmdq_wqe *wqe, cmdq_set_lcmd_bufdesc(wqe_lcmd, buf_in); } +static void cmdq_set_direct_wqe(struct hinic_cmdq_wqe *wqe, + enum cmdq_cmd_type cmd_type, + void *buf_in, u16 in_size, + struct hinic_cmdq_buf *buf_out, int wrapped, + enum hinic_cmd_ack_type ack_type, + enum hinic_mod_type mod, u8 cmd, u16 prod_idx) +{ + struct hinic_cmdq_direct_wqe *direct_wqe = &wqe->direct_wqe; + enum completion_format complete_format; + struct hinic_cmdq_wqe_scmd *wqe_scmd; + + wqe_scmd = &direct_wqe->wqe_scmd; + + switch (cmd_type) { + case CMDQ_CMD_SYNC_SGE_RESP: + complete_format = COMPLETE_SGE; + cmdq_set_sge_completion(&wqe_scmd->completion, buf_out); + break; + case CMDQ_CMD_SYNC_DIRECT_RESP: + complete_format = COMPLETE_DIRECT; + wqe_scmd->completion.direct_resp = 0; + break; + } + + cmdq_prepare_wqe_ctrl(wqe, wrapped, ack_type, mod, cmd, prod_idx, + complete_format, DATA_DIRECT, BUFDESC_SCMD_LEN); + + cmdq_set_direct_wqe_data(direct_wqe, buf_in, in_size); +} + static void cmdq_wqe_fill(void *dst, void *src) { memcpy(dst + FIRST_DATA_TO_WRITE_LAST, src + FIRST_DATA_TO_WRITE_LAST, @@ -352,6 +426,52 @@ static int cmdq_sync_cmd_direct_resp(struct hinic_cmdq *cmdq, return 0; } +static int cmdq_set_arm_bit(struct hinic_cmdq *cmdq, void *buf_in, + u16 in_size) +{ + struct hinic_cmdq_wqe *curr_cmdq_wqe, cmdq_wqe; + u16 curr_prod_idx, next_prod_idx; + struct hinic_wq *wq = cmdq->wq; + struct hinic_hw_wqe *hw_wqe; + int wrapped, num_wqebbs; + + /* Keep doorbell index correct */ + spin_lock(&cmdq->cmdq_lock); + + /* WQE_SIZE = WQEBB_SIZE, we will get the wq element and not shadow*/ + hw_wqe = hinic_get_wqe(wq, WQE_SCMD_SIZE, &curr_prod_idx); + if (IS_ERR(hw_wqe)) { + spin_unlock(&cmdq->cmdq_lock); + return -EBUSY; + } + + curr_cmdq_wqe = &hw_wqe->cmdq_wqe; + + wrapped = cmdq->wrapped; + + num_wqebbs = ALIGN(WQE_SCMD_SIZE, wq->wqebb_size) / wq->wqebb_size; + next_prod_idx = curr_prod_idx + num_wqebbs; + if (next_prod_idx >= wq->q_depth) { + cmdq->wrapped = !cmdq->wrapped; + next_prod_idx -= wq->q_depth; + } + + cmdq_set_direct_wqe(&cmdq_wqe, CMDQ_CMD_SYNC_DIRECT_RESP, buf_in, + in_size, NULL, wrapped, HINIC_CMD_ACK_TYPE_CMDQ, + HINIC_MOD_COMM, CMDQ_SET_ARM_CMD, curr_prod_idx); + + /* The data that is written to HW should be in Big Endian Format */ + hinic_cpu_to_be32(&cmdq_wqe, WQE_SCMD_SIZE); + + /* cmdq wqe is not shadow, therefore wqe will be written to wq */ + cmdq_wqe_fill(curr_cmdq_wqe, &cmdq_wqe); + + cmdq_set_db(cmdq, HINIC_CMDQ_SYNC, next_prod_idx); + + spin_unlock(&cmdq->cmdq_lock); + return 0; +} + static int cmdq_params_valid(struct hinic_cmdq_buf *buf_in) { if (buf_in->size > HINIC_CMDQ_MAX_DATA_SIZE) @@ -389,13 +509,188 @@ int hinic_cmdq_direct_resp(struct hinic_cmdqs *cmdqs, } /** + * hinic_set_arm_bit - set arm bit for enable interrupt again + * @cmdqs: the cmdqs + * @q_type: type of queue to set the arm bit for + * @q_id: the queue number + * + * Return 0 - Success, negative - Failure + **/ +int hinic_set_arm_bit(struct hinic_cmdqs *cmdqs, + enum hinic_set_arm_qtype q_type, u32 q_id) +{ + struct hinic_cmdq *cmdq = &cmdqs->cmdq[HINIC_CMDQ_SYNC]; + struct hinic_hwif *hwif = cmdqs->hwif; + struct pci_dev *pdev = hwif->pdev; + struct hinic_cmdq_arm_bit arm_bit; + int err; + + arm_bit.q_type = q_type; + arm_bit.q_id = q_id; + + err = cmdq_set_arm_bit(cmdq, &arm_bit, sizeof(arm_bit)); + if (err) { + dev_err(&pdev->dev, "Failed to set arm for qid %d\n", q_id); + return err; + } + + return 0; +} + +static void clear_wqe_complete_bit(struct hinic_cmdq *cmdq, + struct hinic_cmdq_wqe *wqe) +{ + u32 header_info = be32_to_cpu(CMDQ_WQE_HEADER(wqe)->header_info); + unsigned int bufdesc_len, wqe_size; + struct hinic_ctrl *ctrl; + + bufdesc_len = HINIC_CMDQ_WQE_HEADER_GET(header_info, BUFDESC_LEN); + wqe_size = cmdq_wqe_size_from_bdlen(bufdesc_len); + if (wqe_size == WQE_LCMD_SIZE) { + struct hinic_cmdq_wqe_lcmd *wqe_lcmd = &wqe->wqe_lcmd; + + ctrl = &wqe_lcmd->ctrl; + } else { + struct hinic_cmdq_direct_wqe *direct_wqe = &wqe->direct_wqe; + struct hinic_cmdq_wqe_scmd *wqe_scmd; + + wqe_scmd = &direct_wqe->wqe_scmd; + ctrl = &wqe_scmd->ctrl; + } + + /* clear HW busy bit */ + ctrl->ctrl_info = 0; + + wmb(); /* verify wqe is clear */ +} + +/** + * cmdq_arm_ceq_handler - cmdq completion event handler for arm command + * @cmdq: the cmdq of the arm command + * @wqe: the wqe of the arm command + * + * Return 0 - Success, negative - Failure + **/ +static int cmdq_arm_ceq_handler(struct hinic_cmdq *cmdq, + struct hinic_cmdq_wqe *wqe) +{ + struct hinic_cmdq_direct_wqe *direct_wqe = &wqe->direct_wqe; + struct hinic_cmdq_wqe_scmd *wqe_scmd; + struct hinic_ctrl *ctrl; + u32 ctrl_info; + + wqe_scmd = &direct_wqe->wqe_scmd; + ctrl = &wqe_scmd->ctrl; + ctrl_info = be32_to_cpu(ctrl->ctrl_info); + + /* HW should toggle the HW BUSY BIT */ + if (!CMDQ_WQE_COMPLETED(ctrl_info)) + return -EBUSY; + + clear_wqe_complete_bit(cmdq, wqe); + + hinic_put_wqe(cmdq->wq, WQE_SCMD_SIZE); + return 0; +} + +static void cmdq_update_errcode(struct hinic_cmdq *cmdq, u16 prod_idx, + int errcode) +{ + if (cmdq->errcode[prod_idx]) + *cmdq->errcode[prod_idx] = errcode; +} + +/** + * cmdq_arm_ceq_handler - cmdq completion event handler for sync command + * @cmdq: the cmdq of the command + * @cons_idx: the consumer index to update the error code for + * @errcode: the error code + **/ +static void cmdq_sync_cmd_handler(struct hinic_cmdq *cmdq, u16 cons_idx, + int errcode) +{ + u16 prod_idx = cons_idx; + + spin_lock(&cmdq->cmdq_lock); + cmdq_update_errcode(cmdq, prod_idx, errcode); + + wmb(); /* write all before update for the command request */ + + if (cmdq->done[prod_idx]) + complete(cmdq->done[prod_idx]); + spin_unlock(&cmdq->cmdq_lock); +} + +static int cmdq_cmd_ceq_handler(struct hinic_cmdq *cmdq, u16 ci, + struct hinic_cmdq_wqe *cmdq_wqe) +{ + struct hinic_cmdq_wqe_lcmd *wqe_lcmd = &cmdq_wqe->wqe_lcmd; + struct hinic_status *status = &wqe_lcmd->status; + struct hinic_ctrl *ctrl = &wqe_lcmd->ctrl; + int errcode; + + if (!CMDQ_WQE_COMPLETED(be32_to_cpu(ctrl->ctrl_info))) + return -EBUSY; + + errcode = CMDQ_WQE_ERRCODE_GET(be32_to_cpu(status->status_info), VAL); + + cmdq_sync_cmd_handler(cmdq, ci, errcode); + + clear_wqe_complete_bit(cmdq, cmdq_wqe); + hinic_put_wqe(cmdq->wq, WQE_LCMD_SIZE); + return 0; +} + +/** * cmdq_ceq_handler - cmdq completion event handler * @handle: private data for the handler(cmdqs) * @ceqe_data: ceq element data **/ static void cmdq_ceq_handler(void *handle, u32 ceqe_data) { - /* should be implemented */ + enum hinic_cmdq_type cmdq_type = CMDQ_CEQE_GET(ceqe_data, TYPE); + struct hinic_cmdqs *cmdqs = (struct hinic_cmdqs *)handle; + struct hinic_cmdq *cmdq = &cmdqs->cmdq[cmdq_type]; + struct hinic_cmdq_header *header; + struct hinic_hw_wqe *hw_wqe; + int err, set_arm = 0; + u32 saved_data; + u16 ci; + + /* Read the smallest wqe size for getting wqe size */ + while ((hw_wqe = hinic_read_wqe(cmdq->wq, WQE_SCMD_SIZE, &ci))) { + if (IS_ERR(hw_wqe)) + break; + + header = CMDQ_WQE_HEADER(&hw_wqe->cmdq_wqe); + saved_data = be32_to_cpu(header->saved_data); + + if (HINIC_SAVED_DATA_GET(saved_data, ARM)) { + /* arm_bit was set until here */ + set_arm = 0; + + if (cmdq_arm_ceq_handler(cmdq, &hw_wqe->cmdq_wqe)) + break; + } else { + set_arm = 1; + + hw_wqe = hinic_read_wqe(cmdq->wq, WQE_LCMD_SIZE, &ci); + if (IS_ERR(hw_wqe)) + break; + + if (cmdq_cmd_ceq_handler(cmdq, ci, &hw_wqe->cmdq_wqe)) + break; + } + } + + if (set_arm) { + struct hinic_hwif *hwif = cmdqs->hwif; + struct pci_dev *pdev = hwif->pdev; + + err = hinic_set_arm_bit(cmdqs, HINIC_SET_ARM_CMDQ, cmdq_type); + if (err) + dev_err(&pdev->dev, "Failed to set arm for CMDQ\n"); + } } /** diff --git a/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.h b/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.h index e11a4f0..b355834 100644 --- a/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.h +++ b/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.h @@ -100,6 +100,10 @@ enum hinic_cmdq_type { HINIC_MAX_CMDQ_TYPES, }; +enum hinic_set_arm_qtype { + HINIC_SET_ARM_CMDQ, +}; + enum hinic_cmd_ack_type { HINIC_CMD_ACK_TYPE_CMDQ, }; @@ -110,6 +114,11 @@ struct hinic_cmdq_buf { size_t size; }; +struct hinic_cmdq_arm_bit { + u32 q_type; + u32 q_id; +}; + struct hinic_cmdq_ctxt_info { u64 curr_wqe_page_pfn; u64 wq_block_pfn; @@ -167,6 +176,9 @@ int hinic_cmdq_direct_resp(struct hinic_cmdqs *cmdqs, enum hinic_mod_type mod, u8 cmd, struct hinic_cmdq_buf *buf_in, u64 *out_param); +int hinic_set_arm_bit(struct hinic_cmdqs *cmdqs, + enum hinic_set_arm_qtype q_type, u32 q_id); + int hinic_init_cmdqs(struct hinic_cmdqs *cmdqs, struct hinic_hwif *hwif, void __iomem **db_area); -- 2.7.4