diff options
Diffstat (limited to 'drivers/scsi/ahci.c')
| -rw-r--r-- | drivers/scsi/ahci.c | 32 |
1 files changed, 27 insertions, 5 deletions
diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c index 57ef7ae387d9..4e96ec5f2ff9 100644 --- a/drivers/scsi/ahci.c +++ b/drivers/scsi/ahci.c @@ -134,6 +134,7 @@ enum { PORT_IRQ_D2H_REG_FIS, /* PORT_CMD bits */ + PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */ PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */ PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */ PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */ @@ -441,7 +442,7 @@ static void ahci_phy_reset(struct ata_port *ap) void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr; struct ata_taskfile tf; struct ata_device *dev = &ap->device[0]; - u32 tmp; + u32 new_tmp, tmp; __sata_phy_reset(ap); @@ -455,8 +456,21 @@ static void ahci_phy_reset(struct ata_port *ap) tf.nsect = (tmp) & 0xff; dev->class = ata_dev_classify(&tf); - if (!ata_dev_present(dev)) + if (!ata_dev_present(dev)) { ata_port_disable(ap); + return; + } + + /* Make sure port's ATAPI bit is set appropriately */ + new_tmp = tmp = readl(port_mmio + PORT_CMD); + if (dev->class == ATA_DEV_ATAPI) + new_tmp |= PORT_CMD_ATAPI; + else + new_tmp &= ~PORT_CMD_ATAPI; + if (new_tmp != tmp) { + writel(new_tmp, port_mmio + PORT_CMD); + readl(port_mmio + PORT_CMD); /* flush */ + } } static u8 ahci_check_status(struct ata_port *ap) @@ -474,11 +488,12 @@ static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf) ata_tf_from_fis(d2h_fis, tf); } -static void ahci_fill_sg(struct ata_queued_cmd *qc) +static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc) { struct ahci_port_priv *pp = qc->ap->private_data; struct scatterlist *sg; struct ahci_sg *ahci_sg; + unsigned int n_sg = 0; VPRINTK("ENTER\n"); @@ -493,8 +508,12 @@ static void ahci_fill_sg(struct ata_queued_cmd *qc) ahci_sg->addr = cpu_to_le32(addr & 0xffffffff); ahci_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16); ahci_sg->flags_size = cpu_to_le32(sg_len - 1); + ahci_sg++; + n_sg++; } + + return n_sg; } static void ahci_qc_prep(struct ata_queued_cmd *qc) @@ -503,13 +522,14 @@ static void ahci_qc_prep(struct ata_queued_cmd *qc) struct ahci_port_priv *pp = ap->private_data; u32 opts; const u32 cmd_fis_len = 5; /* five dwords */ + unsigned int n_elem; /* * Fill in command slot information (currently only one slot, * slot 0, is currently since we don't do queueing) */ - opts = (qc->n_elem << 16) | cmd_fis_len; + opts = cmd_fis_len; if (qc->tf.flags & ATA_TFLAG_WRITE) opts |= AHCI_CMD_WRITE; if (is_atapi_taskfile(&qc->tf)) @@ -533,7 +553,9 @@ static void ahci_qc_prep(struct ata_queued_cmd *qc) if (!(qc->flags & ATA_QCFLAG_DMAMAP)) return; - ahci_fill_sg(qc); + n_elem = ahci_fill_sg(qc); + + pp->cmd_slot[0].opts |= cpu_to_le32(n_elem << 16); } static void ahci_intr_error(struct ata_port *ap, u32 irq_stat) |