Re: [PATCH 0/8] ide-cd: first conversion batch

Borislav Petkov
2008-12-26T13:54:16Z

From: Borislav Petkov <petkovbb@gmail.com>
Date: Fri, 26 Dec 2008 14:39:54 +0100
Subject: [PATCH 11/11] ide-cd: convert to ide-atapi facilities

... and remove no longer needed cdrom_start_packet_command and
cdrom_transfer_packet_command.

Tested lightly with ide-cd and ide-floppy.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
---
drivers/ide/ide-atapi.c | 5 ++-
drivers/ide/ide-cd.c | 96 +----------------------------------------------
include/linux/ide.h | 2 +
3 files changed, 8 insertions(+), 95 deletions(-)

diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index d6a50d6..e96c012 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -549,7 +549,10 @@ static ide_startstop_t ide_transfer_pc(ide_drive_t *drive)
}

/* Set the interrupt routine */
- ide_set_handler(drive, ide_pc_intr, timeout, expiry);
+ ide_set_handler(drive,
+ (dev_is_idecd(drive) ? drive->irq_handler
+ : ide_pc_intr),
+ timeout, expiry);

/* Begin DMA, if necessary */
if (dev_is_idecd(drive)) {
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 2cb301d..cae6937 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -510,99 +510,6 @@ end_request:
return 1;
}

-static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *);
-static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
-
-/*
- * Set up the device registers for transferring a packet command on DEV,
- * expecting to later transfer XFERLEN bytes. HANDLER is the routine
- * which actually transfers the command to the drive. If this is a
- * drq_interrupt device, this routine will arrange for HANDLER to be
- * called when the interrupt from the drive arrives. Otherwise, HANDLER
- * will be called immediately after the drive is prepared for the transfer.
- */
-static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive)
-{
- ide_hwif_t *hwif = drive->hwif;
- struct request *rq = hwif->rq;
- int xferlen;
-
- xferlen = ide_cd_get_xferlen(rq);
-
- ide_debug_log(IDE_DBG_PC, "Call %s, xferlen: %d\n", __func__, xferlen);
-
- /* FIXME: for Virtual DMA we must check harder */
- if (drive->dma)
- drive->dma = !hwif->dma_ops->dma_setup(drive);
-
- /* set up the controller registers */
- ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL,
- xferlen, drive->dma);
-
- if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
- /* waiting for CDB interrupt, not DMA yet. */
- if (drive->dma)
- drive->waiting_for_dma = 0;
-
- /* packet command */
- ide_execute_command(drive, ATA_CMD_PACKET,
- cdrom_transfer_packet_command,
- ATAPI_WAIT_PC, ide_cd_expiry);
- return ide_started;
- } else {
- ide_execute_pkt_cmd(drive);
-
- return cdrom_transfer_packet_command(drive);
- }
-}
-
-/*
- * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
- * registers must have already been prepared by cdrom_start_packet_command.
- * HANDLER is the interrupt handler to call when the command completes or
- * there's data ready.
- */
-#define ATAPI_MIN_CDB_BYTES 12
-static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive)
-{
- ide_hwif_t *hwif = drive->hwif;
- struct request *rq = hwif->rq;
- int cmd_len;
- ide_startstop_t startstop;
-
- ide_debug_log(IDE_DBG_PC, "Call %s\n", __func__);
-
- /* we must wait for DRQ to get set */
- if (ide_wait_stat(&startstop, drive, ATA_DRQ, ATA_BUSY, WAIT_READY)) {
- printk(KERN_ERR "%s: timeout while waiting for DRQ to assert\n",
- drive->name);
- return startstop;
- }
-
- if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
- /* ok, next interrupt will be DMA interrupt */
- if (drive->dma)
- drive->waiting_for_dma = 1;
- }
-
- /* arm the interrupt handler */
- ide_set_handler(drive, cdrom_newpc_intr, rq->timeout, ide_cd_expiry);
-
- /* ATAPI commands get padded out to 12 bytes minimum */
- cmd_len = COMMAND_SIZE(rq->cmd[0]);
- if (cmd_len < ATAPI_MIN_CDB_BYTES)
- cmd_len = ATAPI_MIN_CDB_BYTES;
-
- /* start the DMA if need be */
- if (drive->dma)
- hwif->dma_ops->dma_start(drive);
-
- /* send the command to the device */
- hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
-
- return ide_started;
-}
-
/*
* Check the contents of the interrupt reason register from the cdrom
* and attempt to recover if there are problems. Returns 0 if everything's
@@ -1174,7 +1081,7 @@ static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
return ide_stopped;
}

- return cdrom_start_packet_command(drive);
+ return ide_issue_pc(drive);
}

/*
@@ -2072,6 +1979,7 @@ static int ide_cd_probe(ide_drive_t *drive)
}

drive->debug_mask = debug_mask;
+ drive->irq_handler = cdrom_newpc_intr;

info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
if (info == NULL) {
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 9f6fe1f..1cb460f 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -654,6 +654,8 @@ struct ide_drive_s {
int (*pc_io_buffers)(struct ide_drive_s *, struct ide_atapi_pc *,
unsigned int, int);

+ ide_startstop_t (*irq_handler)(struct ide_drive_s *);
+
unsigned long atapi_flags;

struct ide_atapi_pc request_sense_pc;
--
1.6.0.4

--
Regards/Gruss,
Boris.