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hpt366: rework rate filtering
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- Rework hpt3xx_ratemask() and hpt3xx_ratefilter() so that the former
  returns the max.  mode computed at the load time and doesn't have to do
  bad Ultra33 drive list lookups anymore; remove the duplicate code from
  the latter function.  Move the quirky drive list lookup into
  hpt3xx_quirkproc() where it should have been from the start...

- Disable UltraATA/100 for HPT370 by default as the 33 MHz ATA clock
  being used does not allow for it, and this *greatly* increases the
  transfer speed.

- Save some space by using byte-wide fields in struct hpt_info; switch to
  reading the 8-bit PCI revision ID reg.  only, not the whole 32-bit reg.

- Start incrementing the driver version number with each patch (should
  have been done from the first one posted).

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Sergei Shtylyov authored and Bartlomiej Zolnierkiewicz committed Feb 7, 2007
1 parent 0670afd commit e139b0b
Showing 1 changed file with 85 additions and 94 deletions.
179 changes: 85 additions & 94 deletions drivers/ide/pci/hpt366.c
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/*
* linux/drivers/ide/pci/hpt366.c Version 0.36 April 25, 2003
* linux/drivers/ide/pci/hpt366.c Version 0.43 May 17, 2006
*
* Copyright (C) 1999-2003 Andre Hedrick <andre@linux-ide.org>
* Portions Copyright (C) 2001 Sun Microsystems, Inc.
Expand Down Expand Up @@ -62,8 +62,8 @@
* be done on 66 MHz PCI bus
* - avoid calibrating PLL twice as the second time results in a wrong PCI
* frequency and thus in the wrong timings for the secondary channel
* - disable UltraATA/133 for HPT372 by default (50 MHz DPLL clock do not
* allow for this speed anyway)
* - disable UltraATA/133 for HPT372 and UltraATA/100 for HPT370 by default
* as the ATA clock being used does not allow for this speed anyway
* - add support for HPT302N and HPT371N clocking (the same as for HPT372N)
* - HPT371/N are single channel chips, so avoid touching the primary channel
* which exists only virtually (there's no pins for it)
Expand All @@ -76,6 +76,7 @@
* and for HPT36x the obsolete HDIO_TRISTATE_HWIF handler was called instead
* - pass to init_chipset() handlers a copy of the IDE PCI device structure as
* they tamper with its fields
* - optimize the rate masking/filtering and the drive list lookup code
* <source@mvista.com>
*
*/
Expand Down Expand Up @@ -336,7 +337,7 @@ static u32 sixty_six_base_hpt37x[] = {
#define HPT371_ALLOW_ATA133_6 0
#define HPT302_ALLOW_ATA133_6 0
#define HPT372_ALLOW_ATA133_6 0
#define HPT370_ALLOW_ATA100_5 1
#define HPT370_ALLOW_ATA100_5 0
#define HPT366_ALLOW_ATA66_4 1
#define HPT366_ALLOW_ATA66_3 1
#define HPT366_MAX_DEVS 8
Expand All @@ -354,8 +355,8 @@ static u32 sixty_six_base_hpt37x[] = {
struct hpt_info
{
u8 max_mode; /* Speeds allowed */
int revision; /* Chipset revision */
int flags; /* Chipset properties */
u8 revision; /* Chipset revision */
u8 flags; /* Chipset properties */
#define PLL_MODE 1
#define IS_3xxN 2
#define PCI_66MHZ 4
Expand All @@ -364,61 +365,50 @@ struct hpt_info
};

/*
* This wants fixing so that we do everything not by classrev
* This wants fixing so that we do everything not by revision
* (which breaks on the newest chips) but by creating an
* enumeration of chip variants and using that
*/

static __devinit u32 hpt_revision (struct pci_dev *dev)
static __devinit u8 hpt_revision(struct pci_dev *dev)
{
u32 class_rev;
pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
class_rev &= 0xff;
u8 rev = 0;

pci_read_config_byte(dev, PCI_REVISION_ID, &rev);

switch(dev->device) {
/* Remap new 372N onto 372 */
case PCI_DEVICE_ID_TTI_HPT372N:
class_rev = PCI_DEVICE_ID_TTI_HPT372; break;
rev = PCI_DEVICE_ID_TTI_HPT372; break;
case PCI_DEVICE_ID_TTI_HPT374:
class_rev = PCI_DEVICE_ID_TTI_HPT374; break;
rev = PCI_DEVICE_ID_TTI_HPT374; break;
case PCI_DEVICE_ID_TTI_HPT371:
class_rev = PCI_DEVICE_ID_TTI_HPT371; break;
rev = PCI_DEVICE_ID_TTI_HPT371; break;
case PCI_DEVICE_ID_TTI_HPT302:
class_rev = PCI_DEVICE_ID_TTI_HPT302; break;
rev = PCI_DEVICE_ID_TTI_HPT302; break;
case PCI_DEVICE_ID_TTI_HPT372:
class_rev = PCI_DEVICE_ID_TTI_HPT372; break;
rev = PCI_DEVICE_ID_TTI_HPT372; break;
default:
break;
}
return class_rev;
return rev;
}

static int check_in_drive_lists(ide_drive_t *drive, const char **list);
static int check_in_drive_list(ide_drive_t *drive, const char **list)
{
struct hd_driveid *id = drive->id;

while (*list)
if (!strcmp(*list++,id->model))
return 1;
return 0;
}

static u8 hpt3xx_ratemask (ide_drive_t *drive)
static u8 hpt3xx_ratemask(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
struct hpt_info *info = ide_get_hwifdata(hwif);
u8 mode = 0;

/* FIXME: TODO - move this to set info->mode once at boot */

if (info->revision >= 8) { /* HPT374 */
mode = (HPT374_ALLOW_ATA133_6) ? 4 : 3;
} else if (info->revision >= 7) { /* HPT371 */
mode = (HPT371_ALLOW_ATA133_6) ? 4 : 3;
} else if (info->revision >= 6) { /* HPT302 */
mode = (HPT302_ALLOW_ATA133_6) ? 4 : 3;
} else if (info->revision >= 5) { /* HPT372 */
mode = (HPT372_ALLOW_ATA133_6) ? 4 : 3;
} else if (info->revision >= 4) { /* HPT370A */
mode = (HPT370_ALLOW_ATA100_5) ? 3 : 2;
} else if (info->revision >= 3) { /* HPT370 */
mode = (HPT370_ALLOW_ATA100_5) ? 3 : 2;
mode = (check_in_drive_lists(drive, bad_ata33)) ? 0 : mode;
} else { /* HPT366 and HPT368 */
mode = (check_in_drive_lists(drive, bad_ata33)) ? 0 : 2;
}
struct hpt_info *info = ide_get_hwifdata(HWIF(drive));
u8 mode = info->max_mode;

if (!eighty_ninty_three(drive) && mode)
mode = min(mode, (u8)1);
return mode;
Expand All @@ -429,50 +419,50 @@ static u8 hpt3xx_ratemask (ide_drive_t *drive)
* either PIO or UDMA modes 0,4,5
*/

static u8 hpt3xx_ratefilter (ide_drive_t *drive, u8 speed)
static u8 hpt3xx_ratefilter(ide_drive_t *drive, u8 speed)
{
ide_hwif_t *hwif = drive->hwif;
struct hpt_info *info = ide_get_hwifdata(hwif);
struct hpt_info *info = ide_get_hwifdata(HWIF(drive));
u8 mode = hpt3xx_ratemask(drive);

if (drive->media != ide_disk)
return min(speed, (u8)XFER_PIO_4);

switch(mode) {
switch (mode) {
case 0x04:
speed = min(speed, (u8)XFER_UDMA_6);
break;
case 0x03:
speed = min(speed, (u8)XFER_UDMA_5);
if (info->revision >= 5)
break;
if (check_in_drive_lists(drive, bad_ata100_5))
speed = min(speed, (u8)XFER_UDMA_4);
break;
if (!check_in_drive_list(drive, bad_ata100_5))
goto check_bad_ata33;
/* fall thru */
case 0x02:
speed = min(speed, (u8)XFER_UDMA_4);
/*
* CHECK ME, Does this need to be set to 5 ??
*/
if (info->revision >= 3)
break;
if ((check_in_drive_lists(drive, bad_ata66_4)) ||
(!(HPT366_ALLOW_ATA66_4)))
speed = min(speed, (u8)XFER_UDMA_3);
if ((check_in_drive_lists(drive, bad_ata66_3)) ||
(!(HPT366_ALLOW_ATA66_3)))
speed = min(speed, (u8)XFER_UDMA_2);
break;
goto check_bad_ata33;
if (HPT366_ALLOW_ATA66_4 &&
!check_in_drive_list(drive, bad_ata66_4))
goto check_bad_ata33;

speed = min(speed, (u8)XFER_UDMA_3);
if (HPT366_ALLOW_ATA66_3 &&
!check_in_drive_list(drive, bad_ata66_3))
goto check_bad_ata33;
/* fall thru */
case 0x01:
speed = min(speed, (u8)XFER_UDMA_2);
/*
* CHECK ME, Does this need to be set to 5 ??
*/
if (info->revision >= 3)

check_bad_ata33:
if (info->revision >= 4)
break;
if (check_in_drive_lists(drive, bad_ata33))
speed = min(speed, (u8)XFER_MW_DMA_2);
break;
if (!check_in_drive_list(drive, bad_ata33))
break;
/* fall thru */
case 0x00:
default:
speed = min(speed, (u8)XFER_MW_DMA_2);
Expand All @@ -481,22 +471,6 @@ static u8 hpt3xx_ratefilter (ide_drive_t *drive, u8 speed)
return speed;
}

static int check_in_drive_lists (ide_drive_t *drive, const char **list)
{
struct hd_driveid *id = drive->id;

if (quirk_drives == list) {
while (*list)
if (strstr(id->model, *list++))
return 1;
} else {
while (*list)
if (!strcmp(*list++,id->model))
return 1;
}
return 0;
}

static u32 pci_bus_clock_list(u8 speed, u32 *chipset_table)
{
int i;
Expand Down Expand Up @@ -671,9 +645,15 @@ static int config_chipset_for_dma (ide_drive_t *drive)
return ide_dma_enable(drive);
}

static int hpt3xx_quirkproc (ide_drive_t *drive)
static int hpt3xx_quirkproc(ide_drive_t *drive)
{
return ((int) check_in_drive_lists(drive, quirk_drives));
struct hd_driveid *id = drive->id;
const char **list = quirk_drives;

while (*list)
if (strstr(id->model, *list++))
return 1;
return 0;
}

static void hpt3xx_intrproc (ide_drive_t *drive)
Expand Down Expand Up @@ -1381,7 +1361,7 @@ static void __devinit init_iops_hpt366(ide_hwif_t *hwif)
struct hpt_info *info = kzalloc(sizeof(struct hpt_info), GFP_KERNEL);
struct pci_dev *dev = hwif->pci_dev;
u16 did = dev->device;
u8 rid = 0;
u8 mode, rid = 0;

if(info == NULL) {
printk(KERN_WARNING "hpt366: out of memory.\n");
Expand All @@ -1395,7 +1375,7 @@ static void __devinit init_iops_hpt366(ide_hwif_t *hwif)
return;
}

pci_read_config_byte(dev, PCI_CLASS_REVISION, &rid);
pci_read_config_byte(dev, PCI_REVISION_ID, &rid);

if (( did == PCI_DEVICE_ID_TTI_HPT366 && rid == 6) ||
((did == PCI_DEVICE_ID_TTI_HPT372 ||
Expand All @@ -1404,9 +1384,22 @@ static void __devinit init_iops_hpt366(ide_hwif_t *hwif)
did == PCI_DEVICE_ID_TTI_HPT372N)
info->flags |= IS_3xxN;

info->revision = hpt_revision(dev);

if (info->revision >= 3)
rid = info->revision = hpt_revision(dev);
if (rid >= 8) /* HPT374 */
mode = HPT374_ALLOW_ATA133_6 ? 4 : 3;
else if (rid >= 7) /* HPT371 and HPT371N */
mode = HPT371_ALLOW_ATA133_6 ? 4 : 3;
else if (rid >= 6) /* HPT302 and HPT302N */
mode = HPT302_ALLOW_ATA133_6 ? 4 : 3;
else if (rid >= 5) /* HPT372, HPT372A, and HPT372N */
mode = HPT372_ALLOW_ATA133_6 ? 4 : 3;
else if (rid >= 3) /* HPT370 and HPT370A */
mode = HPT370_ALLOW_ATA100_5 ? 3 : 2;
else /* HPT366 and HPT368 */
mode = (HPT366_ALLOW_ATA66_4 || HPT366_ALLOW_ATA66_3) ? 2 : 1;
info->max_mode = mode;

if (rid >= 3)
hpt37x_clocking(hwif);
else
hpt366_clocking(hwif);
Expand Down Expand Up @@ -1461,25 +1454,23 @@ static int __devinit init_setup_hpt371(struct pci_dev *dev, ide_pci_device_t *d)
static int __devinit init_setup_hpt366(struct pci_dev *dev, ide_pci_device_t *d)
{
struct pci_dev *findev = NULL;
u8 pin1 = 0, pin2 = 0;
unsigned int class_rev;
u8 rev = 0, pin1 = 0, pin2 = 0;
char *chipset_names[] = {"HPT366", "HPT366", "HPT368",
"HPT370", "HPT370A", "HPT372",
"HPT372N" };

if (PCI_FUNC(dev->devfn) & 1)
return -ENODEV;

pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
class_rev &= 0xff;
pci_read_config_byte(dev, PCI_REVISION_ID, &rev);

if(dev->device == PCI_DEVICE_ID_TTI_HPT372N)
class_rev = 6;
rev = 6;

if(class_rev <= 6)
d->name = chipset_names[class_rev];
if(rev <= 6)
d->name = chipset_names[rev];

switch(class_rev) {
switch(rev) {
case 6:
case 5:
case 4:
Expand Down

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