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s390/pci: use claim_resource

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Use pci_claim_resource to find and request bus ressources in
pcibios_add_device. Also move some (de)initialization stuff to
pcibios_enable_device/pcibios_disable_device.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2013-08-29 19:34:37 +02:00 committed by Martin Schwidefsky
parent 67f43f38ee
commit cb80918287
1 changed files with 34 additions and 29 deletions
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63
arch/s390/pci/pci.c
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@ -541,8 +541,6 @@ static void zpci_map_resources(struct zpci_dev *zdev)
continue;
pdev->resource[i].start = (resource_size_t) pci_iomap(pdev, i, 0);
pdev->resource[i].end = pdev->resource[i].start + len - 1;
pr_debug("BAR%i: -> start: %Lx end: %Lx\n",
i, pdev->resource[i].start, pdev->resource[i].end);
}
}
@ -574,32 +572,6 @@ void zpci_free_device(struct zpci_dev *zdev)
kfree(zdev);
}
/*
* Too late for any s390 specific setup, since interrupts must be set up
* already which requires DMA setup too and the pci scan will access the
* config space, which only works if the function handle is enabled.
*/
int pcibios_enable_device(struct pci_dev *pdev, int mask)
{
struct resource *res;
u16 cmd;
int i;
pci_read_config_word(pdev, PCI_COMMAND, &cmd);
for (i = 0; i < PCI_BAR_COUNT; i++) {
res = &pdev->resource[i];
if (res->flags & IORESOURCE_IO)
return -EINVAL;
if (res->flags & IORESOURCE_MEM)
cmd |= PCI_COMMAND_MEMORY;
}
pci_write_config_word(pdev, PCI_COMMAND, cmd);
return 0;
}
int pcibios_add_platform_entries(struct pci_dev *pdev)
{
return zpci_sysfs_add_device(&pdev->dev);
@ -689,16 +661,49 @@ static void zpci_free_iomap(struct zpci_dev *zdev, int entry)
int pcibios_add_device(struct pci_dev *pdev)
{
struct zpci_dev *zdev = get_zdev(pdev);
struct resource *res;
int i;
zdev->pdev = pdev;
zpci_map_resources(zdev);
for (i = 0; i < PCI_BAR_COUNT; i++) {
res = &pdev->resource[i];
if (res->parent || !res->flags)
continue;
pci_claim_resource(pdev, i);
}
return 0;
}
int pcibios_enable_device(struct pci_dev *pdev, int mask)
{
struct zpci_dev *zdev = get_zdev(pdev);
struct resource *res;
u16 cmd;
int i;
zdev->pdev = pdev;
zpci_debug_init_device(zdev);
zpci_fmb_enable_device(zdev);
zpci_map_resources(zdev);
pci_read_config_word(pdev, PCI_COMMAND, &cmd);
for (i = 0; i < PCI_BAR_COUNT; i++) {
res = &pdev->resource[i];
if (res->flags & IORESOURCE_IO)
return -EINVAL;
if (res->flags & IORESOURCE_MEM)
cmd |= PCI_COMMAND_MEMORY;
}
pci_write_config_word(pdev, PCI_COMMAND, cmd);
return 0;
}
void pcibios_release_device(struct pci_dev *pdev)
void pcibios_disable_device(struct pci_dev *pdev)
{
struct zpci_dev *zdev = get_zdev(pdev);