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authorLogan Gunthorpe <logang@deltatee.com>2017-11-29 10:55:27 -0700
committerJon Mason <jdmason@kudzu.us>2018-01-28 22:17:23 -0500
commitbbe35ca5aa2b9e7413c3b14c4887e05829bcd822 (patch)
tree363d68cf3b3e04afe85890d119ee73016a6ea216 /drivers/ntb
parent12cb203b1b3e2a43d6e3f5f5c6e2071636334fc2 (diff)
downloadlinux-bbe35ca5aa2b9e7413c3b14c4887e05829bcd822.tar.bz2
ntb_hw_switchtec: Make switchtec_ntb_init_req_id_table() more general
This is a prep patch in order to support the crosslink feature which will require the driver to setup the requester ID table in another partition as well as it's own. To aid this, create a helper function which sets up the requester IDs from an array. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
Diffstat (limited to 'drivers/ntb')
-rw-r--r--drivers/ntb/hw/mscc/ntb_hw_switchtec.c92
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)