int sense_valid = 0;
int the_result;
int retries = 3;
+ unsigned int alignment;
unsigned long long lba;
unsigned sector_size;
return -EOVERFLOW;
}
+ /* Logical blocks per physical block exponent */
+ sdkp->hw_sector_size = (1 << (buffer[13] & 0xf)) * sector_size;
+
+ /* Lowest aligned logical block */
+ alignment = ((buffer[14] & 0x3f) << 8 | buffer[15]) * sector_size;
+ blk_queue_alignment_offset(sdp->request_queue, alignment);
+ if (alignment && sdkp->first_scan)
+ sd_printk(KERN_NOTICE, sdkp,
+ "physical block alignment offset: %u\n", alignment);
+
sdkp->capacity = lba + 1;
return sector_size;
}
}
sdkp->capacity = lba + 1;
+ sdkp->hw_sector_size = sector_size;
return sector_size;
}
string_get_size(sz, STRING_UNITS_10, cap_str_10,
sizeof(cap_str_10));
- if (sdkp->first_scan || old_capacity != sdkp->capacity)
+ if (sdkp->first_scan || old_capacity != sdkp->capacity) {
sd_printk(KERN_NOTICE, sdkp,
- "%llu %d-byte hardware sectors: (%s/%s)\n",
+ "%llu %d-byte logical blocks: (%s/%s)\n",
(unsigned long long)sdkp->capacity,
sector_size, cap_str_10, cap_str_2);
+
+ if (sdkp->hw_sector_size != sector_size)
+ sd_printk(KERN_NOTICE, sdkp,
+ "%u-byte physical blocks\n",
+ sdkp->hw_sector_size);
+ }
}
/* Rescale capacity to 512-byte units */
else if (sector_size == 256)
sdkp->capacity >>= 1;
+ blk_queue_physical_block_size(sdp->request_queue, sdkp->hw_sector_size);
sdkp->device->sector_size = sector_size;
}
return;
}
+/**
+ * sd_read_block_limits - Query disk device for preferred I/O sizes.
+ * @disk: disk to query
+ */
+static void sd_read_block_limits(struct scsi_disk *sdkp)
+{
+ unsigned int sector_sz = sdkp->device->sector_size;
+ char *buffer;
+
+ /* Block Limits VPD */
+ buffer = scsi_get_vpd_page(sdkp->device, 0xb0);
+
+ if (buffer == NULL)
+ return;
+
+ blk_queue_io_min(sdkp->disk->queue,
+ get_unaligned_be16(&buffer[6]) * sector_sz);
+ blk_queue_io_opt(sdkp->disk->queue,
+ get_unaligned_be32(&buffer[12]) * sector_sz);
+
+ kfree(buffer);
+}
+
+/**
+ * sd_read_block_characteristics - Query block dev. characteristics
+ * @disk: disk to query
+ */
+static void sd_read_block_characteristics(struct scsi_disk *sdkp)
+{
+ char *buffer;
+ u16 rot;
+
+ /* Block Device Characteristics VPD */
+ buffer = scsi_get_vpd_page(sdkp->device, 0xb1);
+
+ if (buffer == NULL)
+ return;
+
+ rot = get_unaligned_be16(&buffer[4]);
+
+ if (rot == 1)
+ queue_flag_set_unlocked(QUEUE_FLAG_NONROT, sdkp->disk->queue);
+
+ kfree(buffer);
+}
+
/**
* sd_revalidate_disk - called the first time a new disk is seen,
* performs disk spin up, read_capacity, etc.
*/
if (sdkp->media_present) {
sd_read_capacity(sdkp, buffer);
+ sd_read_block_limits(sdkp);
+ sd_read_block_characteristics(sdkp);
sd_read_write_protect_flag(sdkp, buffer);
sd_read_cache_type(sdkp, buffer);
sd_read_app_tag_own(sdkp, buffer);
add_disk(gd);
sd_dif_config_host(sdkp);
+ sd_revalidate_disk(gd);
+
sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
sdp->removable ? "removable " : "");
}
async_synchronize_full();
sdkp = dev_get_drvdata(dev);
+ blk_queue_prep_rq(sdkp->device->request_queue, scsi_prep_fn);
device_del(&sdkp->dev);
del_gendisk(sdkp->disk);
sd_shutdown(dev);