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ide: manage resources for PCI devices in ide_pci_enable() (take 3)

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* Reserve PCI BARs 0-3 (0-1 for single port controllers) in
  ide_pci_enable() and remove ide_hwif_request_regions() call
  from ide_device_add_all() (also cleanup resource management
  in scc_pata host driver).

* Fix handling of PCI BAR 4 in ide_pci_enable(), then cleanup
  ide_iomio_dma() (+ init_hwif_trm290() in trm290 host driver)
  and remove ide_release[_iomio]_dma().

v2:
* Fixup trm290 host driver.

v3:
* Because of scc_pata host driver changes we need to call
  pci_request_selected_regions() also in setup_mmio_scc().

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-04-26 22:25:19 +02:00
parent 7ebe5936c2
commit 0d1bad216c
7 changed files with 30 additions and 84 deletions
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43
drivers/ide/ide-dma.c
View File

@ -810,7 +810,7 @@ void ide_dma_timeout (ide_drive_t *drive)
EXPORT_SYMBOL(ide_dma_timeout);
static void ide_release_dma_engine(ide_hwif_t *hwif)
void ide_release_dma_engine(ide_hwif_t *hwif)
{
if (hwif->dmatable_cpu) {
struct pci_dev *pdev = to_pci_dev(hwif->dev);
@ -821,27 +821,6 @@ static void ide_release_dma_engine(ide_hwif_t *hwif)
}
}
static int ide_release_iomio_dma(ide_hwif_t *hwif)
{
release_region(hwif->dma_base, 8);
if (hwif->extra_ports)
release_region(hwif->extra_base, hwif->extra_ports);
return 1;
}
/*
* Needed for allowing full modular support of ide-driver
*/
int ide_release_dma(ide_hwif_t *hwif)
{
ide_release_dma_engine(hwif);
if (hwif->mmio)
return 1;
else
return ide_release_iomio_dma(hwif);
}
static int ide_allocate_dma_engine(ide_hwif_t *hwif)
{
struct pci_dev *pdev = to_pci_dev(hwif->dev);
@ -871,25 +850,9 @@ static int ide_iomio_dma(ide_hwif_t *hwif, unsigned long base)
printk(KERN_INFO " %s: BM-DMA at 0x%04lx-0x%04lx",
hwif->name, base, base + 7);
if (!request_region(base, 8, hwif->name)) {
printk(" -- Error, ports in use.\n");
return 1;
}
if (hwif->cds->extra) {
if (hwif->cds->extra)
hwif->extra_base = base + (hwif->channel ? 8 : 16);
if (!hwif->mate || !hwif->mate->extra_ports) {
if (!request_region(hwif->extra_base,
hwif->cds->extra, hwif->cds->name)) {
printk(" -- Error, extra ports in use.\n");
release_region(base, 8);
return 1;
}
hwif->extra_ports = hwif->cds->extra;
}
}
return 0;
}
@ -909,7 +872,7 @@ void ide_setup_dma(ide_hwif_t *hwif, unsigned long base)
return;
if (ide_allocate_dma_engine(hwif)) {
ide_release_dma(hwif);
ide_release_dma_engine(hwif);
return;
}

6
drivers/ide/ide-probe.c
View File

@ -1530,12 +1530,6 @@ int ide_device_add_all(u8 *idx, const struct ide_port_info *d)
hwif = &ide_hwifs[idx[i]];
if (ide_hwif_request_regions(hwif)) {
printk(KERN_ERR "%s: ports already in use, "
"skipping probe\n", hwif->name);
continue;
}
if (ide_probe_port(hwif) == 0)
hwif->present = 1;

2
drivers/ide/ide.c
View File

@ -413,7 +413,7 @@ void ide_unregister(unsigned int index)
spin_lock_irq(&ide_lock);
if (hwif->dma_base)
(void)ide_release_dma(hwif);
ide_release_dma_engine(hwif);
/* restore hwif data to pristine status */
ide_init_port_data(hwif, index);

31
drivers/ide/pci/scc_pata.c
View File

@ -483,7 +483,7 @@ static int setup_mmio_scc (struct pci_dev *dev, const char *name)
unsigned long dma_size = pci_resource_len(dev, 1);
void __iomem *ctl_addr;
void __iomem *dma_addr;
int i;
int i, ret;
for (i = 0; i < MAX_HWIFS; i++) {
if (scc_ports[i].ctl == 0)
@ -492,21 +492,17 @@ static int setup_mmio_scc (struct pci_dev *dev, const char *name)
if (i >= MAX_HWIFS)
return -ENOMEM;
if (!request_mem_region(ctl_base, ctl_size, name)) {
printk(KERN_WARNING "%s: IDE controller MMIO ports not available.\n", SCC_PATA_NAME);
goto fail_0;
}
if (!request_mem_region(dma_base, dma_size, name)) {
printk(KERN_WARNING "%s: IDE controller MMIO ports not available.\n", SCC_PATA_NAME);
goto fail_1;
ret = pci_request_selected_regions(dev, (1 << 2) - 1, name);
if (ret < 0) {
printk(KERN_ERR "%s: can't reserve resources\n", name);
return ret;
}
if ((ctl_addr = ioremap(ctl_base, ctl_size)) == NULL)
goto fail_2;
goto fail_0;
if ((dma_addr = ioremap(dma_base, dma_size)) == NULL)
goto fail_3;
goto fail_1;
pci_set_master(dev);
scc_ports[i].ctl = (unsigned long)ctl_addr;
@ -515,12 +511,8 @@ static int setup_mmio_scc (struct pci_dev *dev, const char *name)
return 1;
fail_3:
iounmap(ctl_addr);
fail_2:
release_mem_region(dma_base, dma_size);
fail_1:
release_mem_region(ctl_base, ctl_size);
iounmap(ctl_addr);
fail_0:
return -ENOMEM;
}
@ -757,10 +749,6 @@ static void __devexit scc_remove(struct pci_dev *dev)
{
struct scc_ports *ports = pci_get_drvdata(dev);
ide_hwif_t *hwif = ports->hwif;
unsigned long ctl_base = pci_resource_start(dev, 0);
unsigned long dma_base = pci_resource_start(dev, 1);
unsigned long ctl_size = pci_resource_len(dev, 0);
unsigned long dma_size = pci_resource_len(dev, 1);
if (hwif->dmatable_cpu) {
pci_free_consistent(dev, PRD_ENTRIES * PRD_BYTES,
@ -773,8 +761,7 @@ static void __devexit scc_remove(struct pci_dev *dev)
hwif->chipset = ide_unknown;
iounmap((void*)ports->dma);
iounmap((void*)ports->ctl);
release_mem_region(dma_base, dma_size);
release_mem_region(ctl_base, ctl_size);
pci_release_selected_regions(dev, (1 << 2) - 1);
memset(ports, 0, sizeof(*ports));
}

6
drivers/ide/pci/trm290.c
View File

@ -257,16 +257,10 @@ static void __devinit init_hwif_trm290(ide_hwif_t *hwif)
printk(KERN_INFO " %s: BM-DMA at 0x%04lx-0x%04lx",
hwif->name, hwif->dma_base, hwif->dma_base + 3);
if (!request_region(hwif->dma_base, 4, hwif->name)) {
printk(KERN_CONT " -- Error, ports in use.\n");
return;
}
hwif->dmatable_cpu = pci_alloc_consistent(dev, PRD_ENTRIES * PRD_BYTES,
&hwif->dmatable_dma);
if (!hwif->dmatable_cpu) {
printk(KERN_CONT " -- Error, unable to allocate DMA table.\n");
release_region(hwif->dma_base, 4);
return;
}
printk(KERN_CONT "\n");

22
drivers/ide/setup-pci.c
View File

@ -158,7 +158,7 @@ EXPORT_SYMBOL_GPL(ide_setup_pci_noise);
static int ide_pci_enable(struct pci_dev *dev, const struct ide_port_info *d)
{
int ret;
int ret, bars;
if (pci_enable_device(dev)) {
ret = pci_enable_device_io(dev);
@ -181,13 +181,21 @@ static int ide_pci_enable(struct pci_dev *dev, const struct ide_port_info *d)
goto out;
}
/* FIXME: Temporary - until we put in the hotplug interface logic
Check that the bits we want are not in use by someone else. */
ret = pci_request_region(dev, 4, "ide_tmp");
if (ret < 0)
goto out;
if (d->host_flags & IDE_HFLAG_SINGLE)
bars = (1 << 2) - 1;
else
bars = (1 << 4) - 1;
pci_release_region(dev, 4);
if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) {
if (d->host_flags & IDE_HFLAG_CS5520)
bars |= (1 << 2);
else
bars |= (1 << 4);
}
ret = pci_request_selected_regions(dev, bars, d->name);
if (ret < 0)
printk(KERN_ERR "%s: can't reserve resources\n", d->name);
out:
return ret;
}

4
include/linux/ide.h
View File

@ -1158,7 +1158,7 @@ void ide_destroy_dmatable(ide_drive_t *);
#ifdef CONFIG_BLK_DEV_IDEDMA_SFF
extern int ide_build_dmatable(ide_drive_t *, struct request *);
extern int ide_release_dma(ide_hwif_t *);
extern void ide_release_dma_engine(ide_hwif_t *);
extern void ide_setup_dma(ide_hwif_t *, unsigned long);
void ide_dma_host_set(ide_drive_t *, int);
@ -1182,7 +1182,7 @@ static inline void ide_check_dma_crc(ide_drive_t *drive) { ; }
#endif /* CONFIG_BLK_DEV_IDEDMA */
#ifndef CONFIG_BLK_DEV_IDEDMA_SFF
static inline void ide_release_dma(ide_hwif_t *drive) {;}
static inline void ide_release_dma_engine(ide_hwif_t *hwif) { ; }
#endif
#ifdef CONFIG_BLK_DEV_IDEACPI