ide: add IDE_HFLAG_CLEAR_SIMPLEX host flag

* Rename 'simplex_stat' variable to 'dma_stat' in ide_get_or_set_dma_base().

* Factor out code for forcing host out of "simplex" mode from
  ide_get_or_set_dma_base() to ide_pci_clear_simplex() helper.

* Add IDE_HFLAG_CLEAR_SIMPLEX host flag and set it in alim15x3 (for M5229),
  amd74xx (for AMD 7409), cmd64x (for CMD643), generic (for Netcell) and
  serverworks (for CSB5) host drivers.

* Make ide_get_or_set_dma_base() test for IDE_HFLAG_CLEAR_SIMPLEX host flag
  instead of checking dev->device (BTW the code was buggy because it didn't
  check for dev->vendor, luckily none of these PCI Device IDs was used by
  some other vendor for PCI IDE controller).
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent 993da8f9
......@@ -775,7 +775,7 @@ static int __devinit alim15x3_init_one(struct pci_dev *dev, const struct pci_dev
};
struct ide_port_info d = ali15x3_chipset;
u8 rev = dev->revision;
u8 rev = dev->revision, idx = id->driver_data;
if (pci_dev_present(ati_rs100))
printk(KERN_WARNING "alim15x3: ATI Radeon IGP Northbridge is not yet fully tested.\n");
......@@ -798,6 +798,9 @@ static int __devinit alim15x3_init_one(struct pci_dev *dev, const struct pci_dev
d.udma_mask = ATA_UDMA6;
}
if (idx == 0)
d.host_flags |= IDE_HFLAG_CLEAR_SIMPLEX;
#if defined(CONFIG_SPARC64)
d.init_hwif = init_hwif_common_ali15x3;
#endif /* CONFIG_SPARC64 */
......@@ -807,7 +810,7 @@ static int __devinit alim15x3_init_one(struct pci_dev *dev, const struct pci_dev
static const struct pci_device_id alim15x3_pci_tbl[] = {
{ PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5229), 0 },
{ PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5228), 0 },
{ PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5228), 1 },
{ 0, },
};
MODULE_DEVICE_TABLE(pci, alim15x3_pci_tbl);
......
......@@ -295,6 +295,7 @@ static int __devinit amd74xx_probe(struct pci_dev *dev, const struct pci_device_
if (idx == 1) {
if (dev->revision <= 7)
d.swdma_mask = 0;
d.host_flags |= IDE_HFLAG_CLEAR_SIMPLEX;
} else if (idx == 4) {
if (dev->subsystem_vendor == PCI_VENDOR_ID_AMD &&
dev->subsystem_device == PCI_DEVICE_ID_AMD_SERENADE)
......
......@@ -443,7 +443,9 @@ static const struct ide_port_info cmd64x_chipsets[] __devinitdata = {
.init_chipset = init_chipset_cmd64x,
.init_hwif = init_hwif_cmd64x,
.enablebits = {{0x00,0x00,0x00}, {0x51,0x08,0x08}},
.host_flags = IDE_HFLAG_ABUSE_PREFETCH | IDE_HFLAG_BOOTABLE,
.host_flags = IDE_HFLAG_CLEAR_SIMPLEX |
IDE_HFLAG_ABUSE_PREFETCH |
IDE_HFLAG_BOOTABLE,
.pio_mask = ATA_PIO5,
.mwdma_mask = ATA_MWDMA2,
.udma_mask = 0x00, /* no udma */
......
......@@ -104,7 +104,8 @@ static const struct ide_port_info generic_chipsets[] __devinitdata = {
{ /* 14 */
.name = "Revolution",
.host_flags = IDE_HFLAG_TRUST_BIOS_FOR_DMA |
.host_flags = IDE_HFLAG_CLEAR_SIMPLEX |
IDE_HFLAG_TRUST_BIOS_FOR_DMA |
IDE_HFLAG_OFF_BOARD,
.swdma_mask = ATA_SWDMA2,
.mwdma_mask = ATA_MWDMA2,
......
......@@ -418,7 +418,9 @@ static int __devinit svwks_init_one(struct pci_dev *dev, const struct pci_device
d = serverworks_chipsets[idx];
if (idx == 2 || idx == 3) {
if (idx == 1)
d.host_flags |= IDE_HFLAG_CLEAR_SIMPLEX;
else if (idx == 2 || idx == 3) {
if ((PCI_FUNC(dev->devfn) & 1) == 0) {
if (pci_resource_start(dev, 0) != 0x01f1)
d.host_flags &= ~IDE_HFLAG_BOOTABLE;
......
......@@ -140,6 +140,16 @@ static int ide_setup_pci_baseregs (struct pci_dev *dev, const char *name)
}
#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
static void ide_pci_clear_simplex(unsigned long dma_base, const char *name)
{
u8 dma_stat = inb(dma_base + 2);
outb(dma_stat & 0x60, dma_base + 2);
dma_stat = inb(dma_base + 2);
if (dma_stat & 0x80)
printk(KERN_INFO "%s: simplex device: DMA forced\n", name);
}
/**
* ide_get_or_set_dma_base - setup BMIBA
* @d: IDE port info
......@@ -154,6 +164,7 @@ static unsigned long ide_get_or_set_dma_base(const struct ide_port_info *d, ide_
{
unsigned long dma_base = 0;
struct pci_dev *dev = hwif->pci_dev;
u8 dma_stat = 0;
if (hwif->mmio)
return hwif->dma_base;
......@@ -174,52 +185,30 @@ static unsigned long ide_get_or_set_dma_base(const struct ide_port_info *d, ide_
if (hwif->channel)
dma_base += 8;
if ((d->host_flags & IDE_HFLAG_CS5520) == 0) {
u8 simplex_stat = 0;
switch(dev->device) {
case PCI_DEVICE_ID_AL_M5219:
case PCI_DEVICE_ID_AL_M5229:
case PCI_DEVICE_ID_AMD_VIPER_7409:
case PCI_DEVICE_ID_CMD_643:
case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
case PCI_DEVICE_ID_REVOLUTION:
simplex_stat = inb(dma_base + 2);
outb(simplex_stat & 0x60, dma_base + 2);
simplex_stat = inb(dma_base + 2);
if (simplex_stat & 0x80) {
printk(KERN_INFO "%s: simplex device: "
"DMA forced\n",
d->name);
}
break;
default:
/*
* If the device claims "simplex" DMA,
* this means only one of the two interfaces
* can be trusted with DMA at any point in time.
* So we should enable DMA only on one of the
* two interfaces.
*/
simplex_stat = hwif->INB(dma_base + 2);
if (simplex_stat & 0x80) {
/* simplex device? */
/*
* At this point we haven't probed the drives so we can't make the
* appropriate decision. Really we should defer this problem
* until we tune the drive then try to grab DMA ownership if we want
* to be the DMA end. This has to be become dynamic to handle hot
* plug.
*/
if (hwif->mate && hwif->mate->dma_base) {
printk(KERN_INFO "%s: simplex device: "
"DMA disabled\n",
d->name);
dma_base = 0;
}
}
}
if (d->host_flags & IDE_HFLAG_CS5520)
goto out;
if (d->host_flags & IDE_HFLAG_CLEAR_SIMPLEX) {
ide_pci_clear_simplex(dma_base, d->name);
goto out;
}
/*
* If the device claims "simplex" DMA, this means that only one of
* the two interfaces can be trusted with DMA at any point in time
* (so we should enable DMA only on one of the two interfaces).
*
* FIXME: At this point we haven't probed the drives so we can't make
* the appropriate decision. Really we should defer this problem until
* we tune the drive then try to grab DMA ownership if we want to be
* the DMA end. This has to be become dynamic to handle hot-plug.
*/
dma_stat = hwif->INB(dma_base + 2);
if ((dma_stat & 0x80) && hwif->mate && hwif->mate->dma_base) {
printk(KERN_INFO "%s: simplex device: DMA disabled\n", d->name);
dma_base = 0;
}
out:
return dma_base;
}
#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
......
......@@ -1093,6 +1093,8 @@ enum {
IDE_HFLAG_ABUSE_SET_DMA_MODE = (1 << 26),
/* host is CY82C693 */
IDE_HFLAG_CY82C693 = (1 << 27),
/* force host out of "simplex" mode */
IDE_HFLAG_CLEAR_SIMPLEX = (1 << 28),
};
#ifdef CONFIG_BLK_DEV_OFFBOARD
......
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