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LinuxKPI: pci.h split up pcim_iomap_regions_request_all()

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Factor out parts of pcim_iomap_regions_request_all() into
pcim_iomap_regions() now needed for a driver.

Sponsored by:	The FreeBSD Foundation
MFC after:	7 days
Reviewed by:	hselasky
Differential Revision: https://reviews.freebsd.org/D36654
This commit is contained in:
Bjoern A. Zeeb 2022-09-21 19:41:37 +00:00
parent 8e30f49256
commit 30048f6142
1 changed files with 35 additions and 17 deletions
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52
sys/compat/linuxkpi/common/include/linux/pci.h
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@ -1472,28 +1472,17 @@ pcim_iomap_table(struct pci_dev *pdev)
}
static inline int
pcim_iomap_regions_request_all(struct pci_dev *pdev, uint32_t mask, char *name)
pcim_iomap_regions(struct pci_dev *pdev, uint32_t mask, const char *name)
{
struct pcim_iomap_devres *dr;
void *res;
uint32_t mappings, requests, req_mask;
int bar, error;
uint32_t mappings;
int bar;
dr = lkpi_pcim_iomap_devres_find(pdev);
if (dr == NULL)
return (-ENOMEM);
/* Request all the BARs ("regions") we do not iomap. */
req_mask = ((1 << (PCIR_MAX_BAR_0 + 1)) - 1) & ~mask;
for (bar = requests = 0; requests != req_mask; bar++) {
if ((req_mask & (1 << bar)) == 0)
continue;
error = pci_request_region(pdev, bar, name);
if (error != 0 && error != -ENODEV)
goto err;
requests |= (1 << bar);
}
/* Now iomap all the requested (by "mask") ones. */
for (bar = mappings = 0; mappings != mask; bar++) {
if ((mask & (1 << bar)) == 0)
@ -1516,7 +1505,6 @@ pcim_iomap_regions_request_all(struct pci_dev *pdev, uint32_t mask, char *name)
}
return (0);
err:
for (bar = PCIR_MAX_BAR_0; bar >= 0; bar--) {
if ((mappings & (1 << bar)) != 0) {
@ -1524,14 +1512,44 @@ pcim_iomap_regions_request_all(struct pci_dev *pdev, uint32_t mask, char *name)
if (res == NULL)
continue;
pci_iounmap(pdev, res);
} else if ((requests & (1 << bar)) != 0) {
pci_release_region(pdev, bar);
}
}
return (-EINVAL);
}
static inline int
pcim_iomap_regions_request_all(struct pci_dev *pdev, uint32_t mask, char *name)
{
uint32_t requests, req_mask;
int bar, error;
/* Request all the BARs ("regions") we do not iomap. */
req_mask = ((1 << (PCIR_MAX_BAR_0 + 1)) - 1) & ~mask;
for (bar = requests = 0; requests != req_mask; bar++) {
if ((req_mask & (1 << bar)) == 0)
continue;
error = pci_request_region(pdev, bar, name);
if (error != 0 && error != -ENODEV)
goto err;
requests |= (1 << bar);
}
error = pcim_iomap_regions(pdev, mask, name);
if (error != 0)
goto err;
return (0);
err:
for (bar = PCIR_MAX_BAR_0; bar >= 0; bar--) {
if ((requests & (1 << bar)) != 0)
pci_release_region(pdev, bar);
}
return (-EINVAL);
}
/* This is a FreeBSD extension so we can use bus_*(). */
static inline void
linuxkpi_pcim_want_to_use_bus_functions(struct pci_dev *pdev)