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-rw-r--r--drivers/ntb/hw/mscc/ntb_hw_switchtec.c65
1 files changed, 55 insertions, 10 deletions
diff --git a/drivers/ntb/hw/mscc/ntb_hw_switchtec.c b/drivers/ntb/hw/mscc/ntb_hw_switchtec.c
index 17db0f50bb22..145b31209f20 100644
--- a/drivers/ntb/hw/mscc/ntb_hw_switchtec.c
+++ b/drivers/ntb/hw/mscc/ntb_hw_switchtec.c
@@ -94,6 +94,7 @@ struct switchtec_ntb {
struct ntb_ctrl_regs __iomem *mmio_self_ctrl;
struct ntb_ctrl_regs __iomem *mmio_peer_ctrl;
struct ntb_dbmsg_regs __iomem *mmio_self_dbmsg;
+ struct ntb_dbmsg_regs __iomem *mmio_peer_dbmsg;
void __iomem *mmio_xlink_win;
@@ -188,10 +189,10 @@ static int switchtec_ntb_part_op(struct switchtec_ntb *sndev,
static int switchtec_ntb_send_msg(struct switchtec_ntb *sndev, int idx,
u32 val)
{
- if (idx < 0 || idx >= ARRAY_SIZE(sndev->mmio_self_dbmsg->omsg))
+ if (idx < 0 || idx >= ARRAY_SIZE(sndev->mmio_peer_dbmsg->omsg))
return -EINVAL;
- iowrite32(val, &sndev->mmio_self_dbmsg->omsg[idx].msg);
+ iowrite32(val, &sndev->mmio_peer_dbmsg->omsg[idx].msg);
return 0;
}
@@ -474,6 +475,25 @@ static int crosslink_is_enabled(struct switchtec_ntb *sndev)
return ioread8(&inf->ntp_info[sndev->peer_partition].xlink_enabled);
}
+static void crosslink_init_dbmsgs(struct switchtec_ntb *sndev)
+{
+ int i;
+ u32 msg_map = 0;
+
+ if (!crosslink_is_enabled(sndev))
+ return;
+
+ for (i = 0; i < ARRAY_SIZE(sndev->mmio_peer_dbmsg->imsg); i++) {
+ int m = i | sndev->self_partition << 2;
+
+ msg_map |= m << i * 8;
+ }
+
+ iowrite32(msg_map, &sndev->mmio_peer_dbmsg->msg_map);
+ iowrite64(sndev->db_valid_mask << sndev->db_peer_shift,
+ &sndev->mmio_peer_dbmsg->odb_mask);
+}
+
enum {
LINK_MESSAGE = 0,
MSG_LINK_UP = 1,
@@ -504,6 +524,9 @@ static void switchtec_ntb_check_link(struct switchtec_ntb *sndev)
ntb_link_event(&sndev->ntb);
dev_info(&sndev->stdev->dev, "ntb link %s\n",
link_sta ? "up" : "down");
+
+ if (link_sta)
+ crosslink_init_dbmsgs(sndev);
}
}
@@ -649,7 +672,7 @@ static int switchtec_ntb_peer_db_addr(struct ntb_dev *ntb,
struct switchtec_ntb *sndev = ntb_sndev(ntb);
unsigned long offset;
- offset = (unsigned long)sndev->mmio_self_dbmsg->odb -
+ offset = (unsigned long)sndev->mmio_peer_dbmsg->odb -
(unsigned long)sndev->stdev->mmio;
offset += sndev->db_shift / 8;
@@ -667,7 +690,7 @@ static int switchtec_ntb_peer_db_set(struct ntb_dev *ntb, u64 db_bits)
struct switchtec_ntb *sndev = ntb_sndev(ntb);
iowrite64(db_bits << sndev->db_peer_shift,
- &sndev->mmio_self_dbmsg->odb);
+ &sndev->mmio_peer_dbmsg->odb);
return 0;
}
@@ -852,6 +875,7 @@ static int switchtec_ntb_init_sndev(struct switchtec_ntb *sndev)
sndev->mmio_self_ctrl = &sndev->mmio_ctrl[sndev->self_partition];
sndev->mmio_peer_ctrl = &sndev->mmio_ctrl[sndev->peer_partition];
sndev->mmio_self_dbmsg = &sndev->mmio_dbmsg[sndev->self_partition];
+ sndev->mmio_peer_dbmsg = sndev->mmio_self_dbmsg;
return 0;
}
@@ -1072,6 +1096,7 @@ static int switchtec_ntb_init_crosslink(struct switchtec_ntb *sndev)
const int ntb_lut_idx = 1;
u64 bar_addrs[6];
u64 addr;
+ int offset;
int bar_cnt;
if (!crosslink_is_enabled(sndev))
@@ -1087,7 +1112,13 @@ static int switchtec_ntb_init_crosslink(struct switchtec_ntb *sndev)
return -EINVAL;
}
- addr = bar_addrs[0];
+ addr = (bar_addrs[0] + SWITCHTEC_GAS_NTB_OFFSET +
+ SWITCHTEC_NTB_REG_DBMSG_OFFSET +
+ sizeof(struct ntb_dbmsg_regs) * sndev->peer_partition);
+
+ offset = addr & (LUT_SIZE - 1);
+ addr -= offset;
+
rc = config_rsvd_lut_win(sndev, sndev->mmio_self_ctrl, ntb_lut_idx,
sndev->peer_partition, addr);
if (rc)
@@ -1109,8 +1140,11 @@ static int switchtec_ntb_init_crosslink(struct switchtec_ntb *sndev)
return rc;
}
+ sndev->mmio_peer_dbmsg = sndev->mmio_xlink_win + offset;
sndev->nr_rsvd_luts++;
+ crosslink_init_dbmsgs(sndev);
+
return 0;
}
@@ -1163,24 +1197,35 @@ static void switchtec_ntb_init_mw(struct switchtec_ntb *sndev)
* shared among all partitions. So we must split them in half
* (32 for each partition). However, the message interrupts are
* also shared with the top 4 doorbells so we just limit this to
- * 28 doorbells per partition
+ * 28 doorbells per partition.
+ *
+ * In crosslink mode, each side has it's own dbmsg register so
+ * they can each use all 60 of the available doorbells.
*/
static void switchtec_ntb_init_db(struct switchtec_ntb *sndev)
{
- sndev->db_valid_mask = 0x0FFFFFFF;
+ sndev->db_mask = 0x0FFFFFFFFFFFFFFFULL;
- if (sndev->self_partition < sndev->peer_partition) {
+ if (sndev->mmio_peer_dbmsg != sndev->mmio_self_dbmsg) {
+ sndev->db_shift = 0;
+ sndev->db_peer_shift = 0;
+ sndev->db_valid_mask = sndev->db_mask;
+ } else if (sndev->self_partition < sndev->peer_partition) {
sndev->db_shift = 0;
sndev->db_peer_shift = 32;
+ sndev->db_valid_mask = 0x0FFFFFFF;
} else {
sndev->db_shift = 32;
sndev->db_peer_shift = 0;
+ sndev->db_valid_mask = 0x0FFFFFFF;
}
- sndev->db_mask = 0x0FFFFFFFFFFFFFFFULL;
iowrite64(~sndev->db_mask, &sndev->mmio_self_dbmsg->idb_mask);
iowrite64(sndev->db_valid_mask << sndev->db_peer_shift,
- &sndev->mmio_self_dbmsg->odb_mask);
+ &sndev->mmio_peer_dbmsg->odb_mask);
+
+ dev_dbg(&sndev->stdev->dev, "dbs: shift %d/%d, mask %016llx\n",
+ sndev->db_shift, sndev->db_peer_shift, sndev->db_valid_mask);
}
static void switchtec_ntb_init_msgs(struct switchtec_ntb *sndev)