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vfio/pds: Move seq/ack bitmaps into region struct

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Since the host seq/ack bitmaps are part of a region
move them into struct pds_vfio_region. Also, make use
of the bmp_bytes value for validation purposes.

Signed-off-by: Brett Creeley <brett.creeley@amd.com>
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Link: https://lore.kernel.org/r/20231117001207.2793-6-brett.creeley@amd.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Brett Creeley 2023-11-16 16:12:06 -08:00 committed by Alex Williamson
parent 87bdf9807e
commit 0c320f223e
2 changed files with 25 additions and 20 deletions
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35
drivers/vfio/pci/pds/dirty.c
View File

@ -85,18 +85,20 @@ static int pds_vfio_dirty_alloc_bitmaps(struct pds_vfio_dirty *dirty,
return -ENOMEM;
}
dirty->region.host_seq.bmp = host_seq_bmp;
dirty->region.host_ack.bmp = host_ack_bmp;
dirty->region.host_seq = host_seq_bmp;
dirty->region.host_ack = host_ack_bmp;
dirty->region.bmp_bytes = bytes;
return 0;
}
static void pds_vfio_dirty_free_bitmaps(struct pds_vfio_dirty *dirty)
{
vfree(dirty->region.host_seq.bmp);
vfree(dirty->region.host_ack.bmp);
dirty->region.host_seq.bmp = NULL;
dirty->region.host_ack.bmp = NULL;
vfree(dirty->region.host_seq);
vfree(dirty->region.host_ack);
dirty->region.host_seq = NULL;
dirty->region.host_ack = NULL;
dirty->region.bmp_bytes = 0;
}
static void __pds_vfio_dirty_free_sgl(struct pds_vfio_pci_device *pds_vfio,
@ -301,8 +303,8 @@ void pds_vfio_dirty_disable(struct pds_vfio_pci_device *pds_vfio, bool send_cmd)
static int pds_vfio_dirty_seq_ack(struct pds_vfio_pci_device *pds_vfio,
struct pds_vfio_region *region,
struct pds_vfio_bmp_info *bmp_info,
u32 offset, u32 bmp_bytes, bool read_seq)
unsigned long *seq_ack_bmp, u32 offset,
u32 bmp_bytes, bool read_seq)
{
const char *bmp_type_str = read_seq ? "read_seq" : "write_ack";
u8 dma_dir = read_seq ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
@ -319,7 +321,7 @@ static int pds_vfio_dirty_seq_ack(struct pds_vfio_pci_device *pds_vfio,
int err;
int i;
bmp = (void *)((u64)bmp_info->bmp + offset);
bmp = (void *)((u64)seq_ack_bmp + offset);
page_offset = offset_in_page(bmp);
bmp -= page_offset;
@ -387,7 +389,7 @@ static int pds_vfio_dirty_write_ack(struct pds_vfio_pci_device *pds_vfio,
u32 offset, u32 len)
{
return pds_vfio_dirty_seq_ack(pds_vfio, region, &region->host_ack,
return pds_vfio_dirty_seq_ack(pds_vfio, region, region->host_ack,
offset, len, WRITE_ACK);
}
@ -395,7 +397,7 @@ static int pds_vfio_dirty_read_seq(struct pds_vfio_pci_device *pds_vfio,
struct pds_vfio_region *region,
u32 offset, u32 len)
{
return pds_vfio_dirty_seq_ack(pds_vfio, region, &region->host_seq,
return pds_vfio_dirty_seq_ack(pds_vfio, region, region->host_seq,
offset, len, READ_SEQ);
}
@ -411,8 +413,8 @@ static int pds_vfio_dirty_process_bitmaps(struct pds_vfio_pci_device *pds_vfio,
int dword_count;
dword_count = len_bytes / sizeof(u64);
seq = (__le64 *)((u64)region->host_seq.bmp + bmp_offset);
ack = (__le64 *)((u64)region->host_ack.bmp + bmp_offset);
seq = (__le64 *)((u64)region->host_seq + bmp_offset);
ack = (__le64 *)((u64)region->host_ack + bmp_offset);
bmp_offset_bit = bmp_offset * 8;
for (int i = 0; i < dword_count; i++) {
@ -479,6 +481,13 @@ static int pds_vfio_dirty_sync(struct pds_vfio_pci_device *pds_vfio,
return -EINVAL;
}
if (bmp_bytes > region->bmp_bytes) {
dev_err(dev,
"Calculated bitmap bytes %llu larger than region's cached bmp_bytes %llu\n",
bmp_bytes, region->bmp_bytes);
return -EINVAL;
}
bmp_offset = DIV_ROUND_UP((iova - region->start) /
region->page_size, sizeof(u64));

10
drivers/vfio/pci/pds/dirty.h
View File

@ -4,14 +4,10 @@
#ifndef _DIRTY_H_
#define _DIRTY_H_
struct pds_vfio_bmp_info {
unsigned long *bmp;
u32 bmp_bytes;
};
struct pds_vfio_region {
struct pds_vfio_bmp_info host_seq;
struct pds_vfio_bmp_info host_ack;
unsigned long *host_seq;
unsigned long *host_ack;
u64 bmp_bytes;
u64 size;
u64 start;
u64 page_size;