diff options
Diffstat (limited to 'drivers/ntb')
| -rw-r--r-- | drivers/ntb/hw/mscc/ntb_hw_switchtec.c | 65 |
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) |