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The add_bounce_page() function can be called when loading physical

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pages which pass a NULL virtual address. If the BUS_DMA_KEEP_PG_OFFSET
flag is set, use the physical address to compute the page offset
instead. The physical address should always be valid when adding
bounce pages and should contain the same page offset like the virtual
address.

Submitted by:	Svatopluk Kraus <onwahe@gmail.com>
MFC after:	1 week
Reviewed by:	jhb@
This commit is contained in:
Hans Petter Selasky 2015-04-28 06:12:37 +00:00
parent 9e2a7dccfe
commit 5caa65ca2d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=282120
5 changed files with 10 additions and 10 deletions
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4
sys/arm/arm/busdma_machdep-v6.c
View File

@ -1685,8 +1685,8 @@ add_bounce_page(bus_dma_tag_t dmat, bus_dmamap_t map, vm_offset_t vaddr,
if (dmat->flags & BUS_DMA_KEEP_PG_OFFSET) {
/* Page offset needs to be preserved. */
bpage->vaddr |= vaddr & PAGE_MASK;
bpage->busaddr |= vaddr & PAGE_MASK;
bpage->vaddr |= addr & PAGE_MASK;
bpage->busaddr |= addr & PAGE_MASK;
}
bpage->datavaddr = vaddr;
bpage->dataaddr = addr;

4
sys/arm/arm/busdma_machdep.c
View File

@ -1441,8 +1441,8 @@ add_bounce_page(bus_dma_tag_t dmat, bus_dmamap_t map, vm_offset_t vaddr,
if (dmat->flags & BUS_DMA_KEEP_PG_OFFSET) {
/* Page offset needs to be preserved. */
bpage->vaddr |= vaddr & PAGE_MASK;
bpage->busaddr |= vaddr & PAGE_MASK;
bpage->vaddr |= addr & PAGE_MASK;
bpage->busaddr |= addr & PAGE_MASK;
}
bpage->datavaddr = vaddr;
bpage->dataaddr = addr;

4
sys/mips/mips/busdma_machdep.c
View File

@ -1359,8 +1359,8 @@ add_bounce_page(bus_dma_tag_t dmat, bus_dmamap_t map, vm_offset_t vaddr,
if (dmat->flags & BUS_DMA_KEEP_PG_OFFSET) {
/* Page offset needs to be preserved. */
bpage->vaddr |= vaddr & PAGE_MASK;
bpage->busaddr |= vaddr & PAGE_MASK;
bpage->vaddr |= addr & PAGE_MASK;
bpage->busaddr |= addr & PAGE_MASK;
}
bpage->datavaddr = vaddr;
bpage->dataaddr = addr;

4
sys/powerpc/powerpc/busdma_machdep.c
View File

@ -1121,8 +1121,8 @@ add_bounce_page(bus_dma_tag_t dmat, bus_dmamap_t map, vm_offset_t vaddr,
if (dmat->flags & BUS_DMA_KEEP_PG_OFFSET) {
/* Page offset needs to be preserved. */
bpage->vaddr |= vaddr & PAGE_MASK;
bpage->busaddr |= vaddr & PAGE_MASK;
bpage->vaddr |= addr & PAGE_MASK;
bpage->busaddr |= addr & PAGE_MASK;
}
bpage->datavaddr = vaddr;
bpage->dataaddr = addr;

4
sys/x86/x86/busdma_bounce.c
View File

@ -994,8 +994,8 @@ add_bounce_page(bus_dma_tag_t dmat, bus_dmamap_t map, vm_offset_t vaddr,
if (dmat->common.flags & BUS_DMA_KEEP_PG_OFFSET) {
/* Page offset needs to be preserved. */
bpage->vaddr |= vaddr & PAGE_MASK;
bpage->busaddr |= vaddr & PAGE_MASK;
bpage->vaddr |= addr & PAGE_MASK;
bpage->busaddr |= addr & PAGE_MASK;
}
bpage->datavaddr = vaddr;
bpage->dataaddr = addr;