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LinuxKPI: Add pci_iomap_range function

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pci_iomap_range creates a virtual mapping cookie for a PCI BAR.
As compared with pci_iomap it got extra offset parameter.

Sponsored by:	Serenity CyberSecurity, LLC
MFC after:	1 week
Reviewed by:	manu, bz
Differential Revision:	https://reviews.freebsd.org/D45904

(cherry picked from commit fcc350c375)
This commit is contained in:
Vladimir Kondratyev 2024-07-21 16:10:25 +03:00
parent 7cc3cbdaa1
commit 7403f2c657
2 changed files with 17 additions and 3 deletions
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4
sys/compat/linuxkpi/common/include/linux/pci.h
View file

@ -362,6 +362,8 @@ bool pci_device_is_present(struct pci_dev *pdev);
int linuxkpi_pcim_enable_device(struct pci_dev *pdev);
void __iomem **linuxkpi_pcim_iomap_table(struct pci_dev *pdev);
void *linuxkpi_pci_iomap_range(struct pci_dev *pdev, int mmio_bar,
unsigned long mmio_off, unsigned long mmio_size);
void *linuxkpi_pci_iomap(struct pci_dev *pdev, int mmio_bar, int mmio_size);
void linuxkpi_pci_iounmap(struct pci_dev *pdev, void *res);
int linuxkpi_pcim_iomap_regions(struct pci_dev *pdev, uint32_t mask,
@ -774,6 +776,8 @@ static inline void pci_disable_sriov(struct pci_dev *dev)
{
}
#define pci_iomap_range(pdev, mmio_bar, mmio_off, mmio_size) \
linuxkpi_pci_iomap_range(pdev, mmio_bar, mmio_off, mmio_size)
#define pci_iomap(pdev, mmio_bar, mmio_size) \
linuxkpi_pci_iomap(pdev, mmio_bar, mmio_size)
#define pci_iounmap(pdev, res) linuxkpi_pci_iounmap(pdev, res)

16
sys/compat/linuxkpi/common/src/linux_pci.c
View file

@ -756,7 +756,8 @@ _lkpi_pci_iomap(struct pci_dev *pdev, int bar, int mmio_size __unused)
}
void *
linuxkpi_pci_iomap(struct pci_dev *pdev, int mmio_bar, int mmio_size)
linuxkpi_pci_iomap_range(struct pci_dev *pdev, int mmio_bar,
unsigned long mmio_off, unsigned long mmio_size)
{
struct resource *res;
@ -766,7 +767,14 @@ linuxkpi_pci_iomap(struct pci_dev *pdev, int mmio_bar, int mmio_size)
/* This is a FreeBSD extension so we can use bus_*(). */
if (pdev->want_iomap_res)
return (res);
return ((void *)rman_get_bushandle(res));
MPASS(mmio_off < rman_get_size(res));
return ((void *)(rman_get_bushandle(res) + mmio_off));
}
void *
linuxkpi_pci_iomap(struct pci_dev *pdev, int mmio_bar, int mmio_size)
{
return (linuxkpi_pci_iomap_range(pdev, mmio_bar, 0, mmio_size));
}
void
@ -775,7 +783,9 @@ linuxkpi_pci_iounmap(struct pci_dev *pdev, void *res)
struct pci_mmio_region *mmio, *p;
TAILQ_FOREACH_SAFE(mmio, &pdev->mmio, next, p) {
if (res != (void *)rman_get_bushandle(mmio->res))
if ((bus_space_handle_t)res < rman_get_bushandle(mmio->res) ||
(bus_space_handle_t)res >= rman_get_bushandle(mmio->res) +
rman_get_size(mmio->res))
continue;
bus_release_resource(pdev->dev.bsddev,
mmio->type, mmio->rid, mmio->res);