diff options
Diffstat (limited to 'ANDROID_3.4.5/sound/pci/trident/trident_memory.c')
| -rw-r--r-- | ANDROID_3.4.5/sound/pci/trident/trident_memory.c | 315 |
1 files changed, 0 insertions, 315 deletions
diff --git a/ANDROID_3.4.5/sound/pci/trident/trident_memory.c b/ANDROID_3.4.5/sound/pci/trident/trident_memory.c deleted file mode 100644 index f9779e23..00000000 --- a/ANDROID_3.4.5/sound/pci/trident/trident_memory.c +++ /dev/null @@ -1,315 +0,0 @@ -/* - * Copyright (c) by Jaroslav Kysela <perex@perex.cz> - * Copyright (c) by Takashi Iwai <tiwai@suse.de> - * Copyright (c) by Scott McNab <sdm@fractalgraphics.com.au> - * - * Trident 4DWave-NX memory page allocation (TLB area) - * Trident chip can handle only 16MByte of the memory at the same time. - * - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - */ - -#include <asm/io.h> -#include <linux/pci.h> -#include <linux/time.h> -#include <linux/mutex.h> - -#include <sound/core.h> -#include <sound/trident.h> - -/* 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 __tlb_to_addr(trident,page) \ - (dma_addr_t)le32_to_cpu((trident->tlb.entries[page]) & ~(SNDRV_TRIDENT_PAGE_SIZE - 1)) - -#if PAGE_SIZE == 4096 -/* page size == SNDRV_TRIDENT_PAGE_SIZE */ -#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) -/* 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) -/* 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) - -#elif PAGE_SIZE == 8192 -/* page size == SNDRV_TRIDENT_PAGE_SIZE x 2*/ -#define ALIGN_PAGE_SIZE PAGE_SIZE -#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) -{ - 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); -} -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); -} - -#else -/* arbitrary size */ -#define UNIT_PAGES (PAGE_SIZE / SNDRV_TRIDENT_PAGE_SIZE) -#define ALIGN_PAGE_SIZE (SNDRV_TRIDENT_PAGE_SIZE * UNIT_PAGES) -#define MAX_ALIGN_PAGES (SNDRV_TRIDENT_MAX_PAGES / UNIT_PAGES) -/* Note: if alignment doesn't match to the maximum size, the last few blocks - * become unusable. To use such blocks, you'll need to check the validity - * of accessing page in set_tlb_bus and set_silent_tlb. search_empty() - * should also check it, too. - */ -#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) -{ - 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; - addr += SNDRV_TRIDENT_PAGE_SIZE; - } -} -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); -} - -#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) - -/* - * search empty pages which may contain given size - */ -static struct snd_util_memblk * -search_empty(struct snd_util_memhdr *hdr, int size) -{ - struct snd_util_memblk *blk, *prev; - int page, psize; - struct list_head *p; - - psize = get_aligned_page(size + ALIGN_PAGE_SIZE -1); - prev = NULL; - page = 0; - list_for_each(p, &hdr->block) { - blk = list_entry(p, struct snd_util_memblk, list); - if (page + psize <= firstpg(blk)) - goto __found_pages; - page = lastpg(blk) + 1; - } - if (page + psize > MAX_ALIGN_PAGES) - return NULL; - -__found_pages: - /* create a new memory block */ - blk = __snd_util_memblk_new(hdr, psize * ALIGN_PAGE_SIZE, p->prev); - if (blk == NULL) - return NULL; - blk->offset = aligned_page_offset(page); /* set aligned offset */ - firstpg(blk) = page; - lastpg(blk) = page + psize - 1; - return blk; -} - - -/* - * check if the given pointer is valid for pages - */ -static int is_valid_page(unsigned long ptr) -{ - if (ptr & ~0x3fffffffUL) { - snd_printk(KERN_ERR "max memory size is 1GB!!\n"); - return 0; - } - if (ptr & (SNDRV_TRIDENT_PAGE_SIZE-1)) { - snd_printk(KERN_ERR "page is not aligned\n"); - return 0; - } - return 1; -} - -/* - * page allocation for DMA (Scatter-Gather version) - */ -static struct snd_util_memblk * -snd_trident_alloc_sg_pages(struct snd_trident *trident, - struct snd_pcm_substream *substream) -{ - struct snd_util_memhdr *hdr; - struct snd_util_memblk *blk; - struct snd_pcm_runtime *runtime = substream->runtime; - int idx, page; - - if (snd_BUG_ON(runtime->dma_bytes <= 0 || - runtime->dma_bytes > SNDRV_TRIDENT_MAX_PAGES * - SNDRV_TRIDENT_PAGE_SIZE)) - return NULL; - hdr = trident->tlb.memhdr; - if (snd_BUG_ON(!hdr)) - return NULL; - - - - mutex_lock(&hdr->block_mutex); - blk = search_empty(hdr, runtime->dma_bytes); - if (blk == NULL) { - mutex_unlock(&hdr->block_mutex); - return NULL; - } - - /* set TLB entries */ - idx = 0; - 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); - } - mutex_unlock(&hdr->block_mutex); - return blk; -} - -/* - * page allocation for DMA (contiguous version) - */ -static struct snd_util_memblk * -snd_trident_alloc_cont_pages(struct snd_trident *trident, - struct snd_pcm_substream *substream) -{ - struct snd_util_memhdr *hdr; - struct snd_util_memblk *blk; - 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 * - SNDRV_TRIDENT_PAGE_SIZE)) - return NULL; - hdr = trident->tlb.memhdr; - if (snd_BUG_ON(!hdr)) - return NULL; - - mutex_lock(&hdr->block_mutex); - blk = search_empty(hdr, runtime->dma_bytes); - if (blk == NULL) { - mutex_unlock(&hdr->block_mutex); - return NULL; - } - - /* 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) { - 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); - } - mutex_unlock(&hdr->block_mutex); - return blk; -} - -/* - * page allocation for DMA - */ -struct snd_util_memblk * -snd_trident_alloc_pages(struct snd_trident *trident, - struct snd_pcm_substream *substream) -{ - if (snd_BUG_ON(!trident || !substream)) - return NULL; - if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_SG) - return snd_trident_alloc_sg_pages(trident, substream); - else - return snd_trident_alloc_cont_pages(trident, substream); -} - - -/* - * release DMA buffer from page table - */ -int snd_trident_free_pages(struct snd_trident *trident, - struct snd_util_memblk *blk) -{ - struct snd_util_memhdr *hdr; - int page; - - if (snd_BUG_ON(!trident || !blk)) - return -EINVAL; - - hdr = trident->tlb.memhdr; - mutex_lock(&hdr->block_mutex); - /* reset TLB entries */ - for (page = firstpg(blk); page <= lastpg(blk); page++) - set_silent_tlb(trident, page); - /* free memory block */ - __snd_util_mem_free(hdr, blk); - mutex_unlock(&hdr->block_mutex); - return 0; -} |