diff options
Diffstat (limited to 'drivers/scsi/libata-core.c')
-rw-r--r-- | drivers/scsi/libata-core.c | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index 14ffb5264b65..9051b6821c1c 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -1251,6 +1251,28 @@ static inline u8 ata_dev_knobble(struct ata_device *dev) return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); } +static void ata_dev_config_ncq(struct ata_device *dev, + char *desc, size_t desc_sz) +{ + struct ata_port *ap = dev->ap; + int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); + + if (!ata_id_has_ncq(dev->id)) { + desc[0] = '\0'; + return; + } + + if (ap->flags & ATA_FLAG_NCQ) { + hdepth = min(ap->host->can_queue, ATA_MAX_QUEUE - 1); + dev->flags |= ATA_DFLAG_NCQ; + } + + if (hdepth >= ddepth) + snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); + else + snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); +} + /** * ata_dev_configure - Configure the specified ATA/ATAPI device * @dev: Target device to configure @@ -1311,6 +1333,7 @@ static int ata_dev_configure(struct ata_device *dev, int print_info) if (ata_id_has_lba(id)) { const char *lba_desc; + char ncq_desc[20]; lba_desc = "LBA"; dev->flags |= ATA_DFLAG_LBA; @@ -1319,14 +1342,17 @@ static int ata_dev_configure(struct ata_device *dev, int print_info) lba_desc = "LBA48"; } + /* config NCQ */ + ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); + /* print device info to dmesg */ if (print_info) ata_dev_printk(dev, KERN_INFO, "ATA-%d, " - "max %s, %Lu sectors: %s\n", + "max %s, %Lu sectors: %s %s\n", ata_id_major_version(id), ata_mode_string(xfer_mask), (unsigned long long)dev->n_sectors, - lba_desc); + lba_desc, ncq_desc); } else { /* CHS */ @@ -5675,6 +5701,7 @@ EXPORT_SYMBOL_GPL(ata_port_queue_task); EXPORT_SYMBOL_GPL(ata_scsi_ioctl); EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); EXPORT_SYMBOL_GPL(ata_scsi_slave_config); +EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); EXPORT_SYMBOL_GPL(ata_scsi_release); EXPORT_SYMBOL_GPL(ata_host_intr); EXPORT_SYMBOL_GPL(sata_scr_valid); |