diff options
-rw-r--r-- | drivers/ntb/hw/mscc/ntb_hw_switchtec.c | 89 |
1 files changed, 85 insertions, 4 deletions
diff --git a/drivers/ntb/hw/mscc/ntb_hw_switchtec.c b/drivers/ntb/hw/mscc/ntb_hw_switchtec.c index b477a8915245..4a6125d2f305 100644 --- a/drivers/ntb/hw/mscc/ntb_hw_switchtec.c +++ b/drivers/ntb/hw/mscc/ntb_hw_switchtec.c @@ -98,6 +98,9 @@ struct switchtec_ntb { int db_shift; int db_peer_shift; + /* synchronize rmw access of db_mask and hw reg */ + spinlock_t db_mask_lock; + int nr_direct_mw; int nr_lut_mw; int direct_mw_to_bar[MAX_DIRECT_MW]; @@ -338,41 +341,115 @@ static int switchtec_ntb_link_disable(struct ntb_dev *ntb) static u64 switchtec_ntb_db_valid_mask(struct ntb_dev *ntb) { - return 0; + struct switchtec_ntb *sndev = ntb_sndev(ntb); + + return sndev->db_valid_mask; } static int switchtec_ntb_db_vector_count(struct ntb_dev *ntb) { - return 0; + return 1; } static u64 switchtec_ntb_db_vector_mask(struct ntb_dev *ntb, int db_vector) { - return 0; + struct switchtec_ntb *sndev = ntb_sndev(ntb); + + if (db_vector < 0 || db_vector > 1) + return 0; + + return sndev->db_valid_mask; } static u64 switchtec_ntb_db_read(struct ntb_dev *ntb) { - return 0; + u64 ret; + struct switchtec_ntb *sndev = ntb_sndev(ntb); + + ret = ioread64(&sndev->mmio_self_dbmsg->idb) >> sndev->db_shift; + + return ret & sndev->db_valid_mask; } static int switchtec_ntb_db_clear(struct ntb_dev *ntb, u64 db_bits) { + struct switchtec_ntb *sndev = ntb_sndev(ntb); + + iowrite64(db_bits << sndev->db_shift, &sndev->mmio_self_dbmsg->idb); + return 0; } static int switchtec_ntb_db_set_mask(struct ntb_dev *ntb, u64 db_bits) { + unsigned long irqflags; + struct switchtec_ntb *sndev = ntb_sndev(ntb); + + if (db_bits & ~sndev->db_valid_mask) + return -EINVAL; + + spin_lock_irqsave(&sndev->db_mask_lock, irqflags); + + sndev->db_mask |= db_bits << sndev->db_shift; + iowrite64(~sndev->db_mask, &sndev->mmio_self_dbmsg->idb_mask); + + spin_unlock_irqrestore(&sndev->db_mask_lock, irqflags); + return 0; } static int switchtec_ntb_db_clear_mask(struct ntb_dev *ntb, u64 db_bits) { + unsigned long irqflags; + struct switchtec_ntb *sndev = ntb_sndev(ntb); + + if (db_bits & ~sndev->db_valid_mask) + return -EINVAL; + + spin_lock_irqsave(&sndev->db_mask_lock, irqflags); + + sndev->db_mask &= ~(db_bits << sndev->db_shift); + iowrite64(~sndev->db_mask, &sndev->mmio_self_dbmsg->idb_mask); + + spin_unlock_irqrestore(&sndev->db_mask_lock, irqflags); + + return 0; +} + +static u64 switchtec_ntb_db_read_mask(struct ntb_dev *ntb) +{ + struct switchtec_ntb *sndev = ntb_sndev(ntb); + + return (sndev->db_mask >> sndev->db_shift) & sndev->db_valid_mask; +} + +static int switchtec_ntb_peer_db_addr(struct ntb_dev *ntb, + phys_addr_t *db_addr, + resource_size_t *db_size) +{ + struct switchtec_ntb *sndev = ntb_sndev(ntb); + unsigned long offset; + + offset = (unsigned long)sndev->mmio_self_dbmsg->odb - + (unsigned long)sndev->stdev->mmio; + + offset += sndev->db_shift / 8; + + if (db_addr) + *db_addr = pci_resource_start(ntb->pdev, 0) + offset; + if (db_size) + *db_size = sizeof(u32); + return 0; } 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); + return 0; } @@ -413,6 +490,8 @@ static const struct ntb_dev_ops switchtec_ntb_ops = { .db_clear = switchtec_ntb_db_clear, .db_set_mask = switchtec_ntb_db_set_mask, .db_clear_mask = switchtec_ntb_db_clear_mask, + .db_read_mask = switchtec_ntb_db_read_mask, + .peer_db_addr = switchtec_ntb_peer_db_addr, .peer_db_set = switchtec_ntb_peer_db_set, .spad_count = switchtec_ntb_spad_count, .spad_read = switchtec_ntb_spad_read, @@ -685,6 +764,8 @@ static irqreturn_t switchtec_ntb_doorbell_isr(int irq, void *dev) dev_dbg(&sndev->stdev->dev, "doorbell\n"); + ntb_db_event(&sndev->ntb, 0); + return IRQ_HANDLED; } |