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vfio/pci: rename and export do_io_rw()

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do_io_rw() is used to read/write to the device MMIO. The grace hopper
VFIO PCI variant driver require this functionality to read/write to
its memory.

Rename this as vfio_pci_core functions and export as GPL.

Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Ankit Agrawal <ankita@nvidia.com>
Link: https://lore.kernel.org/r/20240220115055.23546-2-ankita@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Ankit Agrawal
2024-02-20 17:20:53 +05:30
committed by Alex Williamson
parent 77943f4d2d
commit 4de676d494
2 changed files with 13 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/vfio/pci/vfio_pci_rdwr.c
View File

@@ -96,10 +96,10 @@ VFIO_IOREAD(32)
* reads with -1. This is intended for handling MSI-X vector tables and
* leftover space for ROM BARs.
*/
static ssize_t do_io_rw(struct vfio_pci_core_device *vdev, bool test_mem,
void __iomem *io, char __user *buf,
loff_t off, size_t count, size_t x_start,
size_t x_end, bool iswrite)
ssize_t vfio_pci_core_do_io_rw(struct vfio_pci_core_device *vdev, bool test_mem,
void __iomem *io, char __user *buf,
loff_t off, size_t count, size_t x_start,
size_t x_end, bool iswrite)
{
ssize_t done = 0;
int ret;
@@ -201,6 +201,7 @@ static ssize_t do_io_rw(struct vfio_pci_core_device *vdev, bool test_mem,
return done;
}
EXPORT_SYMBOL_GPL(vfio_pci_core_do_io_rw);
int vfio_pci_core_setup_barmap(struct vfio_pci_core_device *vdev, int bar)
{
@@ -279,8 +280,8 @@ ssize_t vfio_pci_bar_rw(struct vfio_pci_core_device *vdev, char __user *buf,
x_end = vdev->msix_offset + vdev->msix_size;
}
done = do_io_rw(vdev, res->flags & IORESOURCE_MEM, io, buf, pos,
count, x_start, x_end, iswrite);
done = vfio_pci_core_do_io_rw(vdev, res->flags & IORESOURCE_MEM, io, buf, pos,
count, x_start, x_end, iswrite);
if (done >= 0)
*ppos += done;
@@ -348,7 +349,8 @@ ssize_t vfio_pci_vga_rw(struct vfio_pci_core_device *vdev, char __user *buf,
* probing, so we don't currently worry about access in relation
* to the memory enable bit in the command register.
*/
done = do_io_rw(vdev, false, iomem, buf, off, count, 0, 0, iswrite);
done = vfio_pci_core_do_io_rw(vdev, false, iomem, buf, off, count,
0, 0, iswrite);
vga_put(vdev->pdev, rsrc);

5
include/linux/vfio_pci_core.h
View File

@@ -130,7 +130,10 @@ void vfio_pci_core_finish_enable(struct vfio_pci_core_device *vdev);
int vfio_pci_core_setup_barmap(struct vfio_pci_core_device *vdev, int bar);
pci_ers_result_t vfio_pci_core_aer_err_detected(struct pci_dev *pdev,
pci_channel_state_t state);
ssize_t vfio_pci_core_do_io_rw(struct vfio_pci_core_device *vdev, bool test_mem,
void __iomem *io, char __user *buf,
loff_t off, size_t count, size_t x_start,
size_t x_end, bool iswrite);
#define VFIO_IOWRITE_DECLATION(size) \
int vfio_pci_core_iowrite##size(struct vfio_pci_core_device *vdev, \
bool test_mem, u##size val, void __iomem *io);