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Revert "swiotlb: factor out an io_tlb_offset helper"

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This reverts commit 1bbcc985d1.

Fixes the ABI issues in 5.10.35 that at the moment, we can't handle due
to the KABI freeze.  These are not patches that mean much for android
systems, and will be reverted the next KABI "reset" point.

Bug: 161946584
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I88427586de4df897c39bb3d48e8cba86ebf5c4bb
This commit is contained in:
Greg Kroah-Hartman 2021-05-08 13:01:08 +02:00
commit 78957dcb2c
1 changed files with 7 additions and 13 deletions
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20
kernel/dma/swiotlb.c
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@ -50,6 +50,9 @@
#define CREATE_TRACE_POINTS
#include <trace/events/swiotlb.h>
#define OFFSET(val,align) ((unsigned long) \
( (val) & ( (align) - 1)))
#define SLABS_PER_PAGE (1 << (PAGE_SHIFT - IO_TLB_SHIFT))
/*
@ -173,11 +176,6 @@ void swiotlb_print_info(void)
bytes >> 20);
}
static inline unsigned long io_tlb_offset(unsigned long val)
{
return val & (IO_TLB_SEGSIZE - 1);
}
/*
* Early SWIOTLB allocation may be too early to allow an architecture to
* perform the desired operations. This function allows the architecture to
@ -227,7 +225,7 @@ int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
__func__, alloc_size, PAGE_SIZE);
for (i = 0; i < io_tlb_nslabs; i++) {
io_tlb_list[i] = IO_TLB_SEGSIZE - io_tlb_offset(i);
io_tlb_list[i] = IO_TLB_SEGSIZE - OFFSET(i, IO_TLB_SEGSIZE);
io_tlb_orig_addr[i] = INVALID_PHYS_ADDR;
}
io_tlb_index = 0;
@ -361,7 +359,7 @@ swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs)
goto cleanup4;
for (i = 0; i < io_tlb_nslabs; i++) {
io_tlb_list[i] = IO_TLB_SEGSIZE - io_tlb_offset(i);
io_tlb_list[i] = IO_TLB_SEGSIZE - OFFSET(i, IO_TLB_SEGSIZE);
io_tlb_orig_addr[i] = INVALID_PHYS_ADDR;
}
io_tlb_index = 0;
@ -532,9 +530,7 @@ phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, phys_addr_t orig_addr,
for (i = index; i < (int) (index + nslots); i++)
io_tlb_list[i] = 0;
for (i = index - 1;
io_tlb_offset(i) != IO_TLB_SEGSIZE - 1 &&
io_tlb_list[i]; i--)
for (i = index - 1; (OFFSET(i, IO_TLB_SEGSIZE) != IO_TLB_SEGSIZE - 1) && io_tlb_list[i]; i--)
io_tlb_list[i] = ++count;
tlb_addr = io_tlb_start + (index << IO_TLB_SHIFT);
@ -620,9 +616,7 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
* Step 2: merge the returned slots with the preceding slots,
* if available (non zero)
*/
for (i = index - 1;
io_tlb_offset(i) != IO_TLB_SEGSIZE - 1 &&
io_tlb_list[i]; i--)
for (i = index - 1; (OFFSET(i, IO_TLB_SEGSIZE) != IO_TLB_SEGSIZE -1) && io_tlb_list[i]; i--)
io_tlb_list[i] = ++count;
io_tlb_used -= nslots;