On Fri, 30 Jul 2021 at 09:27, Christoph Hellwig hch@lst.de wrote:
Hi Christoph,
On Thu, Jul 29, 2021 at 10:47:45AM +0200, Anders Roxell wrote:
From: Christoph Hellwig hch@lst.de
Move the SCSI-specific bsg code in the SCSI midlayer instead of in the common bsg code. This just keeps the common bsg code block/ and also allows building it as a module.
Signed-off-by: Christoph Hellwig hch@lst.de
[ Please ignore if its already been reported ]
When building arm's defconfig 'footbridge_defconfig' on linux-next tag next-20210728 I see the following error.
Can you try this patch on top?
When I applied that patch ontop of tag next-20210728 and built arm's defconfig 'footbridge_defconfig' I it builds fine.
Thank you for the fix.
From d92a8160ce3fbe64a250482522ca0456277781f9 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig hch@lst.de Date: Mon, 5 Jul 2021 15:02:43 +0200 Subject: cdrom: move the guts of cdrom_read_cdda_bpc into the sr driver
cdrom_read_cdda_bpc relies on sending SCSI command to the low level driver using a REQ_OP_SCSI_IN request. This isn't generic block layer functionality, so some the actual low-level code into the sr driver and call it through a new read_cdda_bpc method in the cdrom_device_ops structure.
With this the CDROM code does not have to pull in scsi_normalize_sense and this depend on CONFIG_SCSI_COMMON.
Signed-off-by: Christoph Hellwig hch@lst.de
Tested-by: Anders Roxell anders.roxell@linaro.org
Cheers, Anders
drivers/cdrom/cdrom.c | 71 +++++-------------------------------------- drivers/scsi/sr.c | 56 +++++++++++++++++++++++++++++++++- include/linux/cdrom.h | 6 ++-- 3 files changed, 67 insertions(+), 66 deletions(-)
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c index 8882b311bafd..bd2e5b1560f5 100644 --- a/drivers/cdrom/cdrom.c +++ b/drivers/cdrom/cdrom.c @@ -629,7 +629,7 @@ int register_cdrom(struct gendisk *disk, struct cdrom_device_info *cdi) if (CDROM_CAN(CDC_MRW_W)) cdi->exit = cdrom_mrw_exit;
if (cdi->disk)
if (cdi->ops->read_cdda_bpc) cdi->cdda_method = CDDA_BPC_FULL; else cdi->cdda_method = CDDA_OLD;
@@ -2159,81 +2159,26 @@ static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf, static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf, int lba, int nframes) {
struct request_queue *q = cdi->disk->queue;
struct request *rq;
struct scsi_request *req;
struct bio *bio;
unsigned int len;
int max_frames = (queue_max_sectors(cdi->disk->queue) << 9) /
CD_FRAMESIZE_RAW; int nr, ret = 0;
if (!q)
return -ENXIO;
if (!blk_queue_scsi_passthrough(q)) {
WARN_ONCE(true,
"Attempt read CDDA info through a non-SCSI queue\n");
return -EINVAL;
}
cdi->last_sense = 0; while (nframes) {
nr = nframes; if (cdi->cdda_method == CDDA_BPC_SINGLE) nr = 1;
if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9))
nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW;
len = nr * CD_FRAMESIZE_RAW;
rq = blk_get_request(q, REQ_OP_DRV_IN, 0);
if (IS_ERR(rq)) {
ret = PTR_ERR(rq);
break;
}
req = scsi_req(rq);
ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
if (ret) {
blk_put_request(rq);
break;
}
req->cmd[0] = GPCMD_READ_CD;
req->cmd[1] = 1 << 2;
req->cmd[2] = (lba >> 24) & 0xff;
req->cmd[3] = (lba >> 16) & 0xff;
req->cmd[4] = (lba >> 8) & 0xff;
req->cmd[5] = lba & 0xff;
req->cmd[6] = (nr >> 16) & 0xff;
req->cmd[7] = (nr >> 8) & 0xff;
req->cmd[8] = nr & 0xff;
req->cmd[9] = 0xf8;
req->cmd_len = 12;
rq->timeout = 60 * HZ;
bio = rq->bio;
blk_execute_rq(cdi->disk, rq, 0);
if (scsi_req(rq)->result) {
struct scsi_sense_hdr sshdr;
ret = -EIO;
scsi_normalize_sense(req->sense, req->sense_len,
&sshdr);
cdi->last_sense = sshdr.sense_key;
}
if (blk_rq_unmap_user(bio))
ret = -EFAULT;
blk_put_request(rq);
else
nr = min(nframes, max_frames);
ret = cdi->ops->read_cdda_bpc(cdi, ubuf, lba, nr,
&cdi->last_sense); if (ret) break; nframes -= nr; lba += nr;
ubuf += len;
ubuf += (nr * CD_FRAMESIZE_RAW); } return ret;
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c index b98e77fe700b..6203a8b58d40 100644 --- a/drivers/scsi/sr.c +++ b/drivers/scsi/sr.c @@ -120,6 +120,8 @@ static void get_capabilities(struct scsi_cd *); static unsigned int sr_check_events(struct cdrom_device_info *cdi, unsigned int clearing, int slot); static int sr_packet(struct cdrom_device_info *, struct packet_command *); +static int sr_read_cdda_bpc(struct cdrom_device_info *cdi, void __user *ubuf,
u32 lba, u32 nr, u8 *last_sense);
static const struct cdrom_device_ops sr_dops = { .open = sr_open, @@ -133,8 +135,9 @@ static const struct cdrom_device_ops sr_dops = { .get_mcn = sr_get_mcn, .reset = sr_reset, .audio_ioctl = sr_audio_ioctl,
.capability = SR_CAPABILITIES, .generic_packet = sr_packet,
.read_cdda_bpc = sr_read_cdda_bpc,
.capability = SR_CAPABILITIES,
};
static void sr_kref_release(struct kref *kref); @@ -951,6 +954,57 @@ static int sr_packet(struct cdrom_device_info *cdi, return cgc->stat; }
+static int sr_read_cdda_bpc(struct cdrom_device_info *cdi, void __user *ubuf,
u32 lba, u32 nr, u8 *last_sense)
+{
struct gendisk *disk = cdi->disk;
u32 len = nr * CD_FRAMESIZE_RAW;
struct scsi_request *req;
struct request *rq;
struct bio *bio;
int ret;
rq = blk_get_request(disk->queue, REQ_OP_DRV_IN, 0);
if (IS_ERR(rq))
return PTR_ERR(rq);
req = scsi_req(rq);
ret = blk_rq_map_user(disk->queue, rq, NULL, ubuf, len, GFP_KERNEL);
if (ret)
goto out_put_request;
req->cmd[0] = GPCMD_READ_CD;
req->cmd[1] = 1 << 2;
req->cmd[2] = (lba >> 24) & 0xff;
req->cmd[3] = (lba >> 16) & 0xff;
req->cmd[4] = (lba >> 8) & 0xff;
req->cmd[5] = lba & 0xff;
req->cmd[6] = (nr >> 16) & 0xff;
req->cmd[7] = (nr >> 8) & 0xff;
req->cmd[8] = nr & 0xff;
req->cmd[9] = 0xf8;
req->cmd_len = 12;
rq->timeout = 60 * HZ;
bio = rq->bio;
blk_execute_rq(disk, rq, 0);
if (scsi_req(rq)->result) {
struct scsi_sense_hdr sshdr;
scsi_normalize_sense(req->sense, req->sense_len,
&sshdr);
*last_sense = sshdr.sense_key;
ret = -EIO;
}
if (blk_rq_unmap_user(bio))
ret = -EFAULT;
+out_put_request:
blk_put_request(rq);
return ret;
+}
/**
sr_kref_release - Called to free the scsi_cd structure
@kref: pointer to embedded kref
diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h index f48d0a31deae..c4fef00abdf3 100644 --- a/include/linux/cdrom.h +++ b/include/linux/cdrom.h @@ -86,11 +86,13 @@ struct cdrom_device_ops { /* play stuff */ int (*audio_ioctl) (struct cdrom_device_info *,unsigned int, void *);
-/* driver specifications */
const int capability; /* capability flags */ /* handle uniform packets for scsi type devices (scsi,atapi) */ int (*generic_packet) (struct cdrom_device_info *, struct packet_command *);
int (*read_cdda_bpc)(struct cdrom_device_info *cdi, void __user *ubuf,
u32 lba, u32 nframes, u8 *last_sense);
+/* driver specifications */
const int capability; /* capability flags */
};
int cdrom_multisession(struct cdrom_device_info *cdi,
2.30.2