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ALSA: trident: Drop shadow TLB pointer table

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The shadow TLB pointer table is allocated and set up, but never really
used any longer by the driver.  Let's drop it.

Since this is the only user of snd_pcm_sgbuf_get_ptr(), we can clean
up the API after this change.

Link: https://lore.kernel.org/r/20210609162551.7842-2-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2021-06-09 18:25:47 +02:00
parent 25c794cd44
commit 74fb98311c
3 changed files with 17 additions and 48 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
sound/pci/trident/trident.h
View File

@ -251,7 +251,6 @@ struct snd_trident_memblk_arg {
struct snd_trident_tlb {
__le32 *entries; /* 16k-aligned TLB table */
dma_addr_t entries_dmaaddr; /* 16k-aligned PCI address to TLB table */
unsigned long * shadow_entries; /* shadow entries with virtual addresses */
struct snd_dma_buffer buffer;
struct snd_util_memhdr * memhdr; /* page allocation list */
struct snd_dma_buffer silent_page;

11
sound/pci/trident/trident_main.c
View File

@ -3331,12 +3331,6 @@ static int snd_trident_tlb_alloc(struct snd_trident *trident)
}
trident->tlb.entries = (__le32 *)ALIGN((unsigned long)trident->tlb.buffer.area, SNDRV_TRIDENT_MAX_PAGES * 4);
trident->tlb.entries_dmaaddr = ALIGN(trident->tlb.buffer.addr, SNDRV_TRIDENT_MAX_PAGES * 4);
/* allocate shadow TLB page table (virtual addresses) */
trident->tlb.shadow_entries =
vmalloc(array_size(SNDRV_TRIDENT_MAX_PAGES,
sizeof(unsigned long)));
if (!trident->tlb.shadow_entries)
return -ENOMEM;
/* allocate and setup silent page and initialise TLB entries */
if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, &trident->pci->dev,
@ -3345,10 +3339,8 @@ static int snd_trident_tlb_alloc(struct snd_trident *trident)
return -ENOMEM;
}
memset(trident->tlb.silent_page.area, 0, SNDRV_TRIDENT_PAGE_SIZE);
for (i = 0; i < SNDRV_TRIDENT_MAX_PAGES; i++) {
for (i = 0; i < SNDRV_TRIDENT_MAX_PAGES; i++)
trident->tlb.entries[i] = cpu_to_le32(trident->tlb.silent_page.addr & ~(SNDRV_TRIDENT_PAGE_SIZE-1));
trident->tlb.shadow_entries[i] = (unsigned long)trident->tlb.silent_page.area;
}
/* use emu memory block manager code to manage tlb page allocation */
trident->tlb.memhdr = snd_util_memhdr_new(SNDRV_TRIDENT_PAGE_SIZE * SNDRV_TRIDENT_MAX_PAGES);
@ -3665,7 +3657,6 @@ static int snd_trident_free(struct snd_trident *trident)
snd_util_memhdr_free(trident->tlb.memhdr);
if (trident->tlb.silent_page.area)
snd_dma_free_pages(&trident->tlb.silent_page);
vfree(trident->tlb.shadow_entries);
snd_dma_free_pages(&trident->tlb.buffer);
}
pci_release_regions(trident->pci);

53
sound/pci/trident/trident_memory.c
View File

@ -19,11 +19,8 @@
/* page arguments of these two macros are Trident page (4096 bytes), not like
* aligned pages in others
*/
#define __set_tlb_bus(trident,page,ptr,addr) \
do { (trident)->tlb.entries[page] = cpu_to_le32((addr) & ~(SNDRV_TRIDENT_PAGE_SIZE-1)); \
(trident)->tlb.shadow_entries[page] = (ptr); } while (0)
#define __tlb_to_ptr(trident,page) \
(void*)((trident)->tlb.shadow_entries[page])
#define __set_tlb_bus(trident,page,addr) \
(trident)->tlb.entries[page] = cpu_to_le32((addr) & ~(SNDRV_TRIDENT_PAGE_SIZE-1))
#define __tlb_to_addr(trident,page) \
(dma_addr_t)le32_to_cpu((trident->tlb.entries[page]) & ~(SNDRV_TRIDENT_PAGE_SIZE - 1))
@ -32,15 +29,13 @@
#define ALIGN_PAGE_SIZE PAGE_SIZE /* minimum page size for allocation */
#define MAX_ALIGN_PAGES SNDRV_TRIDENT_MAX_PAGES /* maxmium aligned pages */
/* fill TLB entrie(s) corresponding to page with ptr */
#define set_tlb_bus(trident,page,ptr,addr) __set_tlb_bus(trident,page,ptr,addr)
#define set_tlb_bus(trident,page,addr) __set_tlb_bus(trident,page,addr)
/* fill TLB entrie(s) corresponding to page with silence pointer */
#define set_silent_tlb(trident,page) __set_tlb_bus(trident, page, (unsigned long)trident->tlb.silent_page.area, trident->tlb.silent_page.addr)
#define set_silent_tlb(trident,page) __set_tlb_bus(trident, page, trident->tlb.silent_page.addr)
/* get aligned page from offset address */
#define get_aligned_page(offset) ((offset) >> 12)
/* get offset address from aligned page */
#define aligned_page_offset(page) ((page) << 12)
/* get buffer address from aligned page */
#define page_to_ptr(trident,page) __tlb_to_ptr(trident, page)
/* get PCI physical address from aligned page */
#define page_to_addr(trident,page) __tlb_to_addr(trident, page)
@ -50,22 +45,21 @@
#define MAX_ALIGN_PAGES (SNDRV_TRIDENT_MAX_PAGES / 2)
#define get_aligned_page(offset) ((offset) >> 13)
#define aligned_page_offset(page) ((page) << 13)
#define page_to_ptr(trident,page) __tlb_to_ptr(trident, (page) << 1)
#define page_to_addr(trident,page) __tlb_to_addr(trident, (page) << 1)
/* fill TLB entries -- we need to fill two entries */
static inline void set_tlb_bus(struct snd_trident *trident, int page,
unsigned long ptr, dma_addr_t addr)
dma_addr_t addr)
{
page <<= 1;
__set_tlb_bus(trident, page, ptr, addr);
__set_tlb_bus(trident, page+1, ptr + SNDRV_TRIDENT_PAGE_SIZE, addr + SNDRV_TRIDENT_PAGE_SIZE);
__set_tlb_bus(trident, page, addr);
__set_tlb_bus(trident, page+1, addr + SNDRV_TRIDENT_PAGE_SIZE);
}
static inline void set_silent_tlb(struct snd_trident *trident, int page)
{
page <<= 1;
__set_tlb_bus(trident, page, (unsigned long)trident->tlb.silent_page.area, trident->tlb.silent_page.addr);
__set_tlb_bus(trident, page+1, (unsigned long)trident->tlb.silent_page.area, trident->tlb.silent_page.addr);
__set_tlb_bus(trident, page, trident->tlb.silent_page.addr);
__set_tlb_bus(trident, page+1, trident->tlb.silent_page.addr);
}
#else
@ -80,18 +74,16 @@ static inline void set_silent_tlb(struct snd_trident *trident, int page)
*/
#define get_aligned_page(offset) ((offset) / ALIGN_PAGE_SIZE)
#define aligned_page_offset(page) ((page) * ALIGN_PAGE_SIZE)
#define page_to_ptr(trident,page) __tlb_to_ptr(trident, (page) * UNIT_PAGES)
#define page_to_addr(trident,page) __tlb_to_addr(trident, (page) * UNIT_PAGES)
/* fill TLB entries -- UNIT_PAGES entries must be filled */
static inline void set_tlb_bus(struct snd_trident *trident, int page,
unsigned long ptr, dma_addr_t addr)
dma_addr_t addr)
{
int i;
page *= UNIT_PAGES;
for (i = 0; i < UNIT_PAGES; i++, page++) {
__set_tlb_bus(trident, page, ptr, addr);
ptr += SNDRV_TRIDENT_PAGE_SIZE;
for (i = 0; i < UNIT_PAGES; i++, pagetr++) {
__set_tlb_bus(trident, page, addr);
addr += SNDRV_TRIDENT_PAGE_SIZE;
}
}
@ -100,20 +92,11 @@ static inline void set_silent_tlb(struct snd_trident *trident, int page)
int i;
page *= UNIT_PAGES;
for (i = 0; i < UNIT_PAGES; i++, page++)
__set_tlb_bus(trident, page, (unsigned long)trident->tlb.silent_page.area, trident->tlb.silent_page.addr);
__set_tlb_bus(trident, page, trident->tlb.silent_page.addr);
}
#endif /* PAGE_SIZE */
/* calculate buffer pointer from offset address */
static inline void *offset_ptr(struct snd_trident *trident, int offset)
{
char *ptr;
ptr = page_to_ptr(trident, get_aligned_page(offset));
ptr += offset % ALIGN_PAGE_SIZE;
return (void*)ptr;
}
/* first and last (aligned) pages of memory block */
#define firstpg(blk) (((struct snd_trident_memblk_arg *)snd_util_memblk_argptr(blk))->first_page)
#define lastpg(blk) (((struct snd_trident_memblk_arg *)snd_util_memblk_argptr(blk))->last_page)
@ -201,14 +184,12 @@ snd_trident_alloc_sg_pages(struct snd_trident *trident,
for (page = firstpg(blk); page <= lastpg(blk); page++, idx++) {
unsigned long ofs = idx << PAGE_SHIFT;
dma_addr_t addr = snd_pcm_sgbuf_get_addr(substream, ofs);
unsigned long ptr = (unsigned long)
snd_pcm_sgbuf_get_ptr(substream, ofs);
if (! is_valid_page(addr)) {
__snd_util_mem_free(hdr, blk);
mutex_unlock(&hdr->block_mutex);
return NULL;
}
set_tlb_bus(trident, page, ptr, addr);
set_tlb_bus(trident, page, addr);
}
mutex_unlock(&hdr->block_mutex);
return blk;
@ -226,7 +207,6 @@ snd_trident_alloc_cont_pages(struct snd_trident *trident,
int page;
struct snd_pcm_runtime *runtime = substream->runtime;
dma_addr_t addr;
unsigned long ptr;
if (snd_BUG_ON(runtime->dma_bytes <= 0 ||
runtime->dma_bytes > SNDRV_TRIDENT_MAX_PAGES *
@ -245,15 +225,14 @@ snd_trident_alloc_cont_pages(struct snd_trident *trident,
/* set TLB entries */
addr = runtime->dma_addr;
ptr = (unsigned long)runtime->dma_area;
for (page = firstpg(blk); page <= lastpg(blk); page++,
ptr += SNDRV_TRIDENT_PAGE_SIZE, addr += SNDRV_TRIDENT_PAGE_SIZE) {
addr += SNDRV_TRIDENT_PAGE_SIZE) {
if (! is_valid_page(addr)) {
__snd_util_mem_free(hdr, blk);
mutex_unlock(&hdr->block_mutex);
return NULL;
}
set_tlb_bus(trident, page, ptr, addr);
set_tlb_bus(trident, page, addr);
}
mutex_unlock(&hdr->block_mutex);
return blk;