diff options
Diffstat (limited to 'drivers/ntb/hw/mscc/ntb_hw_switchtec.c')
-rw-r--r-- | drivers/ntb/hw/mscc/ntb_hw_switchtec.c | 92 |
1 files changed, 56 insertions, 36 deletions
diff --git a/drivers/ntb/hw/mscc/ntb_hw_switchtec.c b/drivers/ntb/hw/mscc/ntb_hw_switchtec.c index b18e938312e1..4adc32fe035a 100644 --- a/drivers/ntb/hw/mscc/ntb_hw_switchtec.c +++ b/drivers/ntb/hw/mscc/ntb_hw_switchtec.c @@ -887,6 +887,55 @@ static int config_rsvd_lut_win(struct switchtec_ntb *sndev, return 0; } +static int config_req_id_table(struct switchtec_ntb *sndev, + struct ntb_ctrl_regs __iomem *mmio_ctrl, + int *req_ids, int count) +{ + int i, rc = 0; + u32 error; + u32 proxy_id; + + if (ioread32(&mmio_ctrl->req_id_table_size) < count) { + dev_err(&sndev->stdev->dev, + "Not enough requester IDs available.\n"); + return -EFAULT; + } + + rc = switchtec_ntb_part_op(sndev, mmio_ctrl, + NTB_CTRL_PART_OP_LOCK, + NTB_CTRL_PART_STATUS_LOCKED); + if (rc) + return rc; + + iowrite32(NTB_PART_CTRL_ID_PROT_DIS, + &mmio_ctrl->partition_ctrl); + + for (i = 0; i < count; i++) { + iowrite32(req_ids[i] << 16 | NTB_CTRL_REQ_ID_EN, + &mmio_ctrl->req_id_table[i]); + + proxy_id = ioread32(&mmio_ctrl->req_id_table[i]); + dev_dbg(&sndev->stdev->dev, + "Requester ID %02X:%02X.%X -> BB:%02X.%X\n", + req_ids[i] >> 8, (req_ids[i] >> 3) & 0x1F, + req_ids[i] & 0x7, (proxy_id >> 4) & 0x1F, + (proxy_id >> 1) & 0x7); + } + + rc = switchtec_ntb_part_op(sndev, mmio_ctrl, + NTB_CTRL_PART_OP_CFG, + NTB_CTRL_PART_STATUS_NORMAL); + + if (rc == -EIO) { + error = ioread32(&mmio_ctrl->req_id_error); + dev_err(&sndev->stdev->dev, + "Error setting up the requester ID table: %08x\n", + error); + } + + return 0; +} + static int map_bars(int *map, struct ntb_ctrl_regs __iomem *ctrl) { int i; @@ -968,52 +1017,23 @@ static void switchtec_ntb_init_msgs(struct switchtec_ntb *sndev) &sndev->mmio_self_dbmsg->imsg[i]); } -static int switchtec_ntb_init_req_id_table(struct switchtec_ntb *sndev) +static int +switchtec_ntb_init_req_id_table(struct switchtec_ntb *sndev) { - int rc = 0; - u16 req_id; - u32 error; - - req_id = ioread16(&sndev->mmio_ntb->requester_id); - - if (ioread32(&sndev->mmio_self_ctrl->req_id_table_size) < 2) { - dev_err(&sndev->stdev->dev, - "Not enough requester IDs available\n"); - return -EFAULT; - } - - rc = switchtec_ntb_part_op(sndev, sndev->mmio_self_ctrl, - NTB_CTRL_PART_OP_LOCK, - NTB_CTRL_PART_STATUS_LOCKED); - if (rc) - return rc; - - iowrite32(NTB_PART_CTRL_ID_PROT_DIS, - &sndev->mmio_self_ctrl->partition_ctrl); + int req_ids[2]; /* * Root Complex Requester ID (which is 0:00.0) */ - iowrite32(0 << 16 | NTB_CTRL_REQ_ID_EN, - &sndev->mmio_self_ctrl->req_id_table[0]); + req_ids[0] = 0; /* * Host Bridge Requester ID (as read from the mmap address) */ - iowrite32(req_id << 16 | NTB_CTRL_REQ_ID_EN, - &sndev->mmio_self_ctrl->req_id_table[1]); - - rc = switchtec_ntb_part_op(sndev, sndev->mmio_self_ctrl, - NTB_CTRL_PART_OP_CFG, - NTB_CTRL_PART_STATUS_NORMAL); - if (rc == -EIO) { - error = ioread32(&sndev->mmio_self_ctrl->req_id_error); - dev_err(&sndev->stdev->dev, - "Error setting up the requester ID table: %08x\n", - error); - } + req_ids[1] = ioread16(&sndev->mmio_ntb->requester_id); - return rc; + return config_req_id_table(sndev, sndev->mmio_self_ctrl, req_ids, + ARRAY_SIZE(req_ids)); } static void switchtec_ntb_init_shared(struct switchtec_ntb *sndev) |