falconide/q40ide: add ->atapi_*put_bytes and ->ata_*put_data methods (take 2)

* Add ->atapi_{in,out}put_bytes and ->ata_{in,out}put_data methods to
  falconide and q40ide host drivers (->ata_* methods are implemented on
  top of ->atapi_* methods so they also do byte-swapping now).

* Cleanup atapi_{in,out}put_bytes().

v2:
* Add 'struct request *rq' argument to ->ata_{in,out}put_data methods
  and don't byte-swap disk fs requests (we shouldn't un-swap fs requests
  because fs itself is stored byte-swapped on the disk) - this is how
  things were done before the patch (ideally device mapper should be
  used instead but it would break existing setups and would have some
  performance impact).

Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Michael Schmitz <schmitz@debian.org>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Richard Zidlicky <rz@linux-m68k.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

7 files changed, 96 insertions, 34 deletions

diff --git a/drivers/ide/cris/ide-cris.c b/drivers/ide/cris/ide-cris.c
index 9df26855bc05..aa263df76569 100644
--- a/drivers/ide/cris/ide-cris.c
+++ b/drivers/ide/cris/ide-cris.c
@@ -673,8 +673,10 @@ cris_ide_inb(unsigned long reg)
         return (unsigned char)cris_ide_inw(reg);
 }
 
-static void cris_ide_input_data (ide_drive_t *drive, void *, unsigned int);
-static void cris_ide_output_data (ide_drive_t *drive, void *, unsigned int);
+static void cris_ide_input_data(ide_drive_t *, struct request *,
+                                void *, unsigned int);
+static void cris_ide_output_data(ide_drive_t *, struct request *,
+                                 void *, unsigned int);
 static void cris_atapi_input_bytes(ide_drive_t *drive, void *, unsigned int);
 static void cris_atapi_output_bytes(ide_drive_t *drive, void *, unsigned int);
 
@@ -900,8 +902,8 @@ cris_atapi_output_bytes (ide_drive_t *drive, void *buffer, unsigned int bytecoun
 /*
  * This is used for most PIO data transfers *from* the IDE interface
  */
-static void
-cris_ide_input_data (ide_drive_t *drive, void *buffer, unsigned int wcount)
+static void cris_ide_input_data(ide_drive_t *drive, struct request *rq,
+                                void *buffer, unsigned int wcount)
 {
         cris_atapi_input_bytes(drive, buffer, wcount << 2);
 }
@@ -909,8 +911,8 @@ cris_ide_input_data (ide_drive_t *drive, void *buffer, unsigned int wcount)
 /*
  * This is used for most PIO data transfers *to* the IDE interface
  */
-static void
-cris_ide_output_data (ide_drive_t *drive, void *buffer, unsigned int wcount)
+static void cris_ide_output_data(ide_drive_t *drive, struct request *,
+                                 void *buffer, unsigned int wcount)
 {
         cris_atapi_output_bytes(drive, buffer, wcount << 2);
 }
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index 3a2d8930d17f..60078cf307fb 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -422,7 +422,7 @@ static void try_to_flush_leftover_data (ide_drive_t *drive)
                 u32 wcount = (i > 16) ? 16 : i;
 
                 i -= wcount;
-                HWIF(drive)->ata_input_data(drive, buffer, wcount);
+                drive->hwif->ata_input_data(drive, NULL, buffer, wcount);
         }
 }
 
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c
index 5425d3038ec2..7ec7fa2aef96 100644
--- a/drivers/ide/ide-iops.c
+++ b/drivers/ide/ide-iops.c
@@ -192,7 +192,8 @@ static void ata_vlb_sync(ide_drive_t *drive, unsigned long port)
 /*
  * This is used for most PIO data transfers *from* the IDE interface
  */
-static void ata_input_data(ide_drive_t *drive, void *buffer, u32 wcount)
+static void ata_input_data(ide_drive_t *drive, struct request *rq,
+                           void *buffer, u32 wcount)
 {
         ide_hwif_t *hwif = drive->hwif;
         struct ide_io_ports *io_ports = &hwif->io_ports;
@@ -215,7 +216,8 @@ static void ata_input_data(ide_drive_t *drive, void *buffer, u32 wcount)
 /*
  * This is used for most PIO data transfers *to* the IDE interface
  */
-static void ata_output_data(ide_drive_t *drive, void *buffer, u32 wcount)
+static void ata_output_data(ide_drive_t *drive, struct request *rq,
+                            void *buffer, u32 wcount)
 {
         ide_hwif_t *hwif = drive->hwif;
         struct ide_io_ports *io_ports = &hwif->io_ports;
@@ -248,14 +250,7 @@ static void atapi_input_bytes(ide_drive_t *drive, void *buffer, u32 bytecount)
         ide_hwif_t *hwif = HWIF(drive);
 
         ++bytecount;
-#if defined(CONFIG_ATARI) || defined(CONFIG_Q40)
-        if (MACH_IS_ATARI || MACH_IS_Q40) {
-                /* Atari has a byte-swapped IDE interface */
-                insw_swapw(hwif->io_ports.data_addr, buffer, bytecount / 2);
-                return;
-        }
-#endif /* CONFIG_ATARI || CONFIG_Q40 */
-        hwif->ata_input_data(drive, buffer, bytecount / 4);
+        hwif->ata_input_data(drive, NULL, buffer, bytecount / 4);
         if ((bytecount & 0x03) >= 2)
                 hwif->INSW(hwif->io_ports.data_addr,
                            (u8 *)buffer + (bytecount & ~0x03), 1);
@@ -266,14 +261,7 @@ static void atapi_output_bytes(ide_drive_t *drive, void *buffer, u32 bytecount)
         ide_hwif_t *hwif = HWIF(drive);
 
         ++bytecount;
-#if defined(CONFIG_ATARI) || defined(CONFIG_Q40)
-        if (MACH_IS_ATARI || MACH_IS_Q40) {
-                /* Atari has a byte-swapped IDE interface */
-                outsw_swapw(hwif->io_ports.data_addr, buffer, bytecount / 2);
-                return;
-        }
-#endif /* CONFIG_ATARI || CONFIG_Q40 */
-        hwif->ata_output_data(drive, buffer, bytecount / 4);
+        hwif->ata_output_data(drive, NULL, buffer, bytecount / 4);
         if ((bytecount & 0x03) >= 2)
                 hwif->OUTSW(hwif->io_ports.data_addr,
                             (u8 *)buffer + (bytecount & ~0x03), 1);
@@ -668,7 +656,7 @@ int ide_driveid_update(ide_drive_t *drive)
                 local_irq_restore(flags);
                 return 0;
         }
-        hwif->ata_input_data(drive, id, SECTOR_WORDS);
+        hwif->ata_input_data(drive, NULL, id, SECTOR_WORDS);
         (void)ide_read_status(drive);   /* clear drive IRQ */
         local_irq_enable();
         local_irq_restore(flags);
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index 862f02603f9b..e06a64605215 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -124,7 +124,7 @@ static inline void do_identify (ide_drive_t *drive, u8 cmd)
 
         id = drive->id;
         /* read 512 bytes of id info */
-        hwif->ata_input_data(drive, id, SECTOR_WORDS);
+        hwif->ata_input_data(drive, NULL, id, SECTOR_WORDS);
 
         drive->id_read = 1;
         local_irq_enable();
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index 9f9ad9fb6b89..7f6bfd314411 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -283,7 +283,8 @@ static u8 wait_drive_not_busy(ide_drive_t *drive)
         return stat;
 }
 
-static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
+static void ide_pio_sector(ide_drive_t *drive, struct request *rq,
+                           unsigned int write)
 {
         ide_hwif_t *hwif = drive->hwif;
         struct scatterlist *sg = hwif->sg_table;
@@ -323,9 +324,9 @@ static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
 
         /* do the actual data transfer */
         if (write)
-                hwif->ata_output_data(drive, buf, SECTOR_WORDS);
+                hwif->ata_output_data(drive, rq, buf, SECTOR_WORDS);
         else
-                hwif->ata_input_data(drive, buf, SECTOR_WORDS);
+                hwif->ata_input_data(drive, rq, buf, SECTOR_WORDS);
 
         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 #ifdef CONFIG_HIGHMEM
@@ -333,13 +334,14 @@ static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
 #endif
 }
 
-static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
+static void ide_pio_multi(ide_drive_t *drive, struct request *rq,
+                          unsigned int write)
 {
         unsigned int nsect;
 
         nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
         while (nsect--)
-                ide_pio_sector(drive, write);
+                ide_pio_sector(drive, rq, write);
 }
 
 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
@@ -362,10 +364,10 @@ static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
         switch (drive->hwif->data_phase) {
         case TASKFILE_MULTI_IN:
         case TASKFILE_MULTI_OUT:
-                ide_pio_multi(drive, write);
+                ide_pio_multi(drive, rq, write);
                 break;
         default:
-                ide_pio_sector(drive, write);
+                ide_pio_sector(drive, rq, write);
                 break;
         }
 
diff --git a/drivers/ide/legacy/falconide.c b/drivers/ide/legacy/falconide.c
index 56cdaa0eeea5..32c044b17d45 100644
--- a/drivers/ide/legacy/falconide.c
+++ b/drivers/ide/legacy/falconide.c
@@ -44,6 +44,36 @@
 int falconide_intr_lock;
 EXPORT_SYMBOL(falconide_intr_lock);
 
+static void falconide_atapi_input_bytes(ide_drive_t *drive, void *buf,
+                                        unsigned int len)
+{
+        insw_swapw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
+}
+
+static void falconide_atapi_output_bytes(ide_drive_t *drive, void *buf,
+                                         unsigned int len)
+{
+        outsw_swapw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
+}
+
+static void falconide_ata_input_data(ide_drive_t *drive, struct request *rq,
+                                     void *buf, unsigned int wcount)
+{
+        if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
+                return insw(drive->hwif->io_ports.data_addr, buf, wcount * 2);
+
+        falconide_atapi_input_bytes(drive, buf, wcount * 4);
+}
+
+static void falconide_ata_output_data(ide_drive_t *drive, struct request *rq,
+                                      void *buf, unsigned int wcount)
+{
+        if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
+                return outsw(drive->hwif->io_ports.data_addr, buf, wcount * 2);
+
+        falconide_atapi_output_bytes(drive, buf, wcount * 4);
+}
+
 static void __init falconide_setup_ports(hw_regs_t *hw)
 {
         int i;
@@ -90,6 +120,12 @@ static int __init falconide_init(void)
                 ide_init_port_data(hwif, index);
                 ide_init_port_hw(hwif, &hw);
 
+                /* Atari has a byte-swapped IDE interface */
+                hwif->atapi_input_bytes  = falconide_atapi_input_bytes;
+                hwif->atapi_output_bytes = falconide_atapi_output_bytes;
+                hwif->ata_input_data     = falconide_ata_input_data;
+                hwif->ata_output_data    = falconide_ata_output_data;
+
                 ide_get_lock(NULL, NULL);
                 ide_device_add(idx, NULL);
                 ide_release_lock();
diff --git a/drivers/ide/legacy/q40ide.c b/drivers/ide/legacy/q40ide.c
index f9210458aea0..deae3d2ca65e 100644
--- a/drivers/ide/legacy/q40ide.c
+++ b/drivers/ide/legacy/q40ide.c
@@ -72,7 +72,35 @@ static void q40_ide_setup_ports(hw_regs_t *hw, unsigned long base,
         hw->ack_intr = ack_intr;
 }
 
+static void q40ide_atapi_input_bytes(ide_drive_t *drive, void *buf,
+                                     unsigned int len)
+{
+        insw_swapw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
+}
 
+static void q40ide_atapi_output_bytes(ide_drive_t *drive, void *buf,
+                                      unsigned int len)
+{
+        outsw_swapw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
+}
+
+static void q40ide_ata_input_data(ide_drive_t *drive, struct request *rq,
+                                  void *buf, unsigned int wcount)
+{
+        if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
+                return insw(drive->hwif->io_ports.data_addr, buf, wcount * 2);
+
+        q40ide_atapi_input_bytes(drive, buf, wcount * 4);
+}
+
+static void q40ide_ata_output_data(ide_drive_t *drive, struct request *rq,
+                                   void *buf, unsigned int wcount)
+{
+        if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
+                return outsw(drive->hwif->io_ports.data_addr, buf, wcount * 2);
+
+        q40ide_atapi_output_bytes(drive, buf, wcount * 4);
+}
 
 /* 
  * the static array is needed to have the name reported in /proc/ioports,
@@ -123,6 +151,12 @@ static int __init q40ide_init(void)
                 ide_init_port_data(hwif, hwif->index);
                 ide_init_port_hw(hwif, &hw);
 
+                /* Q40 has a byte-swapped IDE interface */
+                hwif->atapi_input_bytes  = q40ide_atapi_input_bytes;
+                hwif->atapi_output_bytes = q40ide_atapi_output_bytes;
+                hwif->ata_input_data     = q40ide_ata_input_data;
+                hwif->ata_output_data    = q40ide_ata_output_data;
+
                 idx[i] = hwif->index;
         }
     }