diff options
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/pata_artop.c | 33 |
1 files changed, 27 insertions, 6 deletions
diff --git a/drivers/ata/pata_artop.c b/drivers/ata/pata_artop.c index 07c7fae6da13..d332cfdb0f30 100644 --- a/drivers/ata/pata_artop.c +++ b/drivers/ata/pata_artop.c @@ -12,7 +12,6 @@ * performance Alessandro Zummo <alessandro.zummo@towertech.it> * * TODO - * 850 serialization once the core supports it * Investigate no_dsc on 850R * Clock detect */ @@ -29,7 +28,7 @@ #include <linux/ata.h> #define DRV_NAME "pata_artop" -#define DRV_VERSION "0.4.4" +#define DRV_VERSION "0.4.5" /* * The ARTOP has 33 Mhz and "over clocked" timing tables. Until we @@ -283,6 +282,31 @@ static void artop6260_set_dmamode (struct ata_port *ap, struct ata_device *adev) pci_write_config_byte(pdev, 0x44 + ap->port_no, ultra); } +/** + * artop_6210_qc_defer - implement serialization + * @qc: command + * + * Issue commands per host on this chip. + */ + +static int artop6210_qc_defer(struct ata_queued_cmd *qc) +{ + struct ata_host *host = qc->ap->host; + struct ata_port *alt = host->ports[1 ^ qc->ap->port_no]; + int rc; + + /* First apply the usual rules */ + rc = ata_std_qc_defer(qc); + if (rc != 0) + return rc; + + /* Now apply serialization rules. Only allow a command if the + other channel state machine is idle */ + if (alt && alt->qc_active) + return ATA_DEFER_PORT; + return 0; +} + static struct scsi_host_template artop_sht = { ATA_BMDMA_SHT(DRV_NAME), }; @@ -293,6 +317,7 @@ static struct ata_port_operations artop6210_ops = { .set_piomode = artop6210_set_piomode, .set_dmamode = artop6210_set_dmamode, .prereset = artop6210_pre_reset, + .qc_defer = artop6210_qc_defer, }; static struct ata_port_operations artop6260_ops = { @@ -362,12 +387,8 @@ static int artop_init_one (struct pci_dev *pdev, const struct pci_device_id *id) if (id->driver_data == 0) { /* 6210 variant */ ppi[0] = &info_6210; - ppi[1] = &ata_dummy_port_info; /* BIOS may have left us in UDMA, clear it before libata probe */ pci_write_config_byte(pdev, 0x54, 0); - /* For the moment (also lacks dsc) */ - printk(KERN_WARNING "ARTOP 6210 requires serialize functionality not yet supported by libata.\n"); - printk(KERN_WARNING "Secondary ATA ports will not be activated.\n"); } else if (id->driver_data == 1) /* 6260 */ ppi[0] = &info_626x; |