491 lines
15 KiB
C
491 lines
15 KiB
C
/*
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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* Copyright (c) by Takashi Iwai <tiwai@suse.de>
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* Copyright (c) by Scott McNab <sdm@fractalgraphics.com.au>
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*
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* Trident 4DWave-NX memory page allocation (TLB area)
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* Trident chip can handle only 16MByte of the memory at the same time.
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <asm/io.h>
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#include <linux/pci.h>
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#include <linux/time.h>
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#include <linux/mutex.h>
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#include <sound/core.h>
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#include <sound/trident.h>
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/* page arguments of these two macros are Trident page (4096 bytes), not like
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* aligned pages in others
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*/
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#define __set_tlb_bus(trident,page,ptr,addr) \
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do { (trident)->tlb.entries[page] = cpu_to_le32((addr) & ~(SNDRV_TRIDENT_PAGE_SIZE-1)); \
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(trident)->tlb.shadow_entries[page] = (ptr); } while (0)
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#define __tlb_to_ptr(trident,page) \
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(void*)((trident)->tlb.shadow_entries[page])
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#define __tlb_to_addr(trident,page) \
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(dma_addr_t)le32_to_cpu((trident->tlb.entries[page]) & ~(SNDRV_TRIDENT_PAGE_SIZE - 1))
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#if PAGE_SIZE == 4096
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/* page size == SNDRV_TRIDENT_PAGE_SIZE */
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#define ALIGN_PAGE_SIZE PAGE_SIZE /* minimum page size for allocation */
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#define MAX_ALIGN_PAGES SNDRV_TRIDENT_MAX_PAGES /* maxmium aligned pages */
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/* fill TLB entrie(s) corresponding to page with ptr */
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#define set_tlb_bus(trident,page,ptr,addr) __set_tlb_bus(trident,page,ptr,addr)
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/* fill TLB entrie(s) corresponding to page with silence pointer */
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#define set_silent_tlb(trident,page) __set_tlb_bus(trident, page, (unsigned long)trident->tlb.silent_page.area, trident->tlb.silent_page.addr)
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/* get aligned page from offset address */
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#define get_aligned_page(offset) ((offset) >> 12)
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/* get offset address from aligned page */
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#define aligned_page_offset(page) ((page) << 12)
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/* get buffer address from aligned page */
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#define page_to_ptr(trident,page) __tlb_to_ptr(trident, page)
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/* get PCI physical address from aligned page */
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#define page_to_addr(trident,page) __tlb_to_addr(trident, page)
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#elif PAGE_SIZE == 8192
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/* page size == SNDRV_TRIDENT_PAGE_SIZE x 2*/
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#define ALIGN_PAGE_SIZE PAGE_SIZE
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#define MAX_ALIGN_PAGES (SNDRV_TRIDENT_MAX_PAGES / 2)
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#define get_aligned_page(offset) ((offset) >> 13)
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#define aligned_page_offset(page) ((page) << 13)
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#define page_to_ptr(trident,page) __tlb_to_ptr(trident, (page) << 1)
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#define page_to_addr(trident,page) __tlb_to_addr(trident, (page) << 1)
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/* fill TLB entries -- we need to fill two entries */
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static inline void set_tlb_bus(struct snd_trident *trident, int page,
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unsigned long ptr, dma_addr_t addr)
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{
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page <<= 1;
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__set_tlb_bus(trident, page, ptr, addr);
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__set_tlb_bus(trident, page+1, ptr + SNDRV_TRIDENT_PAGE_SIZE, addr + SNDRV_TRIDENT_PAGE_SIZE);
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}
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static inline void set_silent_tlb(struct snd_trident *trident, int page)
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{
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page <<= 1;
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__set_tlb_bus(trident, page, (unsigned long)trident->tlb.silent_page.area, trident->tlb.silent_page.addr);
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__set_tlb_bus(trident, page+1, (unsigned long)trident->tlb.silent_page.area, trident->tlb.silent_page.addr);
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}
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#else
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/* arbitrary size */
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#define UNIT_PAGES (PAGE_SIZE / SNDRV_TRIDENT_PAGE_SIZE)
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#define ALIGN_PAGE_SIZE (SNDRV_TRIDENT_PAGE_SIZE * UNIT_PAGES)
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#define MAX_ALIGN_PAGES (SNDRV_TRIDENT_MAX_PAGES / UNIT_PAGES)
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/* Note: if alignment doesn't match to the maximum size, the last few blocks
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* become unusable. To use such blocks, you'll need to check the validity
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* of accessing page in set_tlb_bus and set_silent_tlb. search_empty()
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* should also check it, too.
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*/
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#define get_aligned_page(offset) ((offset) / ALIGN_PAGE_SIZE)
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#define aligned_page_offset(page) ((page) * ALIGN_PAGE_SIZE)
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#define page_to_ptr(trident,page) __tlb_to_ptr(trident, (page) * UNIT_PAGES)
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#define page_to_addr(trident,page) __tlb_to_addr(trident, (page) * UNIT_PAGES)
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/* fill TLB entries -- UNIT_PAGES entries must be filled */
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static inline void set_tlb_bus(struct snd_trident *trident, int page,
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unsigned long ptr, dma_addr_t addr)
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{
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int i;
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page *= UNIT_PAGES;
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for (i = 0; i < UNIT_PAGES; i++, page++) {
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__set_tlb_bus(trident, page, ptr, addr);
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ptr += SNDRV_TRIDENT_PAGE_SIZE;
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addr += SNDRV_TRIDENT_PAGE_SIZE;
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}
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}
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static inline void set_silent_tlb(struct snd_trident *trident, int page)
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{
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int i;
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page *= UNIT_PAGES;
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for (i = 0; i < UNIT_PAGES; i++, page++)
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__set_tlb_bus(trident, page, (unsigned long)trident->tlb.silent_page.area, trident->tlb.silent_page.addr);
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}
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#endif /* PAGE_SIZE */
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/* calculate buffer pointer from offset address */
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static inline void *offset_ptr(struct snd_trident *trident, int offset)
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{
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char *ptr;
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ptr = page_to_ptr(trident, get_aligned_page(offset));
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ptr += offset % ALIGN_PAGE_SIZE;
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return (void*)ptr;
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}
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/* first and last (aligned) pages of memory block */
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#define firstpg(blk) (((struct snd_trident_memblk_arg *)snd_util_memblk_argptr(blk))->first_page)
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#define lastpg(blk) (((struct snd_trident_memblk_arg *)snd_util_memblk_argptr(blk))->last_page)
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/*
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* search empty pages which may contain given size
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*/
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static struct snd_util_memblk *
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search_empty(struct snd_util_memhdr *hdr, int size)
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{
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struct snd_util_memblk *blk, *prev;
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int page, psize;
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struct list_head *p;
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psize = get_aligned_page(size + ALIGN_PAGE_SIZE -1);
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prev = NULL;
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page = 0;
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list_for_each(p, &hdr->block) {
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blk = list_entry(p, struct snd_util_memblk, list);
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if (page + psize <= firstpg(blk))
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goto __found_pages;
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page = lastpg(blk) + 1;
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}
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if (page + psize > MAX_ALIGN_PAGES)
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return NULL;
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__found_pages:
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/* create a new memory block */
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blk = __snd_util_memblk_new(hdr, psize * ALIGN_PAGE_SIZE, p->prev);
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if (blk == NULL)
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return NULL;
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blk->offset = aligned_page_offset(page); /* set aligned offset */
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firstpg(blk) = page;
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lastpg(blk) = page + psize - 1;
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return blk;
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}
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/*
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* check if the given pointer is valid for pages
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*/
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static int is_valid_page(unsigned long ptr)
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{
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if (ptr & ~0x3fffffffUL) {
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snd_printk(KERN_ERR "max memory size is 1GB!!\n");
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return 0;
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}
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if (ptr & (SNDRV_TRIDENT_PAGE_SIZE-1)) {
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snd_printk(KERN_ERR "page is not aligned\n");
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return 0;
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}
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return 1;
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}
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/*
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* page allocation for DMA (Scatter-Gather version)
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*/
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static struct snd_util_memblk *
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snd_trident_alloc_sg_pages(struct snd_trident *trident,
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struct snd_pcm_substream *substream)
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{
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struct snd_util_memhdr *hdr;
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struct snd_util_memblk *blk;
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struct snd_pcm_runtime *runtime = substream->runtime;
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int idx, page;
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struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
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snd_assert(runtime->dma_bytes > 0 && runtime->dma_bytes <= SNDRV_TRIDENT_MAX_PAGES * SNDRV_TRIDENT_PAGE_SIZE, return NULL);
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hdr = trident->tlb.memhdr;
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snd_assert(hdr != NULL, return NULL);
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mutex_lock(&hdr->block_mutex);
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blk = search_empty(hdr, runtime->dma_bytes);
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if (blk == NULL) {
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mutex_unlock(&hdr->block_mutex);
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return NULL;
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}
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if (lastpg(blk) - firstpg(blk) >= sgbuf->pages) {
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snd_printk(KERN_ERR "page calculation doesn't match: allocated pages = %d, trident = %d/%d\n", sgbuf->pages, firstpg(blk), lastpg(blk));
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__snd_util_mem_free(hdr, blk);
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mutex_unlock(&hdr->block_mutex);
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return NULL;
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}
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/* set TLB entries */
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idx = 0;
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for (page = firstpg(blk); page <= lastpg(blk); page++, idx++) {
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dma_addr_t addr = sgbuf->table[idx].addr;
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unsigned long ptr = (unsigned long)sgbuf->table[idx].buf;
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if (! is_valid_page(addr)) {
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__snd_util_mem_free(hdr, blk);
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mutex_unlock(&hdr->block_mutex);
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return NULL;
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}
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set_tlb_bus(trident, page, ptr, addr);
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}
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mutex_unlock(&hdr->block_mutex);
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return blk;
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}
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/*
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* page allocation for DMA (contiguous version)
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*/
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static struct snd_util_memblk *
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snd_trident_alloc_cont_pages(struct snd_trident *trident,
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struct snd_pcm_substream *substream)
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{
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struct snd_util_memhdr *hdr;
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struct snd_util_memblk *blk;
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int page;
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struct snd_pcm_runtime *runtime = substream->runtime;
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dma_addr_t addr;
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unsigned long ptr;
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snd_assert(runtime->dma_bytes> 0 && runtime->dma_bytes <= SNDRV_TRIDENT_MAX_PAGES * SNDRV_TRIDENT_PAGE_SIZE, return NULL);
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hdr = trident->tlb.memhdr;
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snd_assert(hdr != NULL, return NULL);
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mutex_lock(&hdr->block_mutex);
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blk = search_empty(hdr, runtime->dma_bytes);
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if (blk == NULL) {
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mutex_unlock(&hdr->block_mutex);
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return NULL;
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}
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/* set TLB entries */
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addr = runtime->dma_addr;
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ptr = (unsigned long)runtime->dma_area;
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for (page = firstpg(blk); page <= lastpg(blk); page++,
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ptr += SNDRV_TRIDENT_PAGE_SIZE, addr += SNDRV_TRIDENT_PAGE_SIZE) {
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if (! is_valid_page(addr)) {
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__snd_util_mem_free(hdr, blk);
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mutex_unlock(&hdr->block_mutex);
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return NULL;
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}
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set_tlb_bus(trident, page, ptr, addr);
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}
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mutex_unlock(&hdr->block_mutex);
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return blk;
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}
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/*
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* page allocation for DMA
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*/
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struct snd_util_memblk *
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snd_trident_alloc_pages(struct snd_trident *trident,
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struct snd_pcm_substream *substream)
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{
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snd_assert(trident != NULL, return NULL);
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snd_assert(substream != NULL, return NULL);
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if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_SG)
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return snd_trident_alloc_sg_pages(trident, substream);
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else
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return snd_trident_alloc_cont_pages(trident, substream);
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}
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/*
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* release DMA buffer from page table
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*/
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int snd_trident_free_pages(struct snd_trident *trident,
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struct snd_util_memblk *blk)
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{
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struct snd_util_memhdr *hdr;
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int page;
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snd_assert(trident != NULL, return -EINVAL);
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snd_assert(blk != NULL, return -EINVAL);
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hdr = trident->tlb.memhdr;
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mutex_lock(&hdr->block_mutex);
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/* reset TLB entries */
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for (page = firstpg(blk); page <= lastpg(blk); page++)
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set_silent_tlb(trident, page);
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/* free memory block */
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__snd_util_mem_free(hdr, blk);
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mutex_unlock(&hdr->block_mutex);
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return 0;
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}
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/*----------------------------------------------------------------
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* memory allocation using multiple pages (for synth)
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*----------------------------------------------------------------
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* Unlike the DMA allocation above, non-contiguous pages are
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* assigned to TLB.
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*----------------------------------------------------------------*/
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/*
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*/
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static int synth_alloc_pages(struct snd_trident *hw, struct snd_util_memblk *blk);
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static int synth_free_pages(struct snd_trident *hw, struct snd_util_memblk *blk);
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/*
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* allocate a synth sample area
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*/
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struct snd_util_memblk *
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snd_trident_synth_alloc(struct snd_trident *hw, unsigned int size)
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{
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struct snd_util_memblk *blk;
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struct snd_util_memhdr *hdr = hw->tlb.memhdr;
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mutex_lock(&hdr->block_mutex);
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blk = __snd_util_mem_alloc(hdr, size);
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if (blk == NULL) {
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mutex_unlock(&hdr->block_mutex);
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return NULL;
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}
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if (synth_alloc_pages(hw, blk)) {
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__snd_util_mem_free(hdr, blk);
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mutex_unlock(&hdr->block_mutex);
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return NULL;
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}
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mutex_unlock(&hdr->block_mutex);
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return blk;
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}
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EXPORT_SYMBOL(snd_trident_synth_alloc);
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/*
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* free a synth sample area
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*/
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int
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snd_trident_synth_free(struct snd_trident *hw, struct snd_util_memblk *blk)
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{
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struct snd_util_memhdr *hdr = hw->tlb.memhdr;
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mutex_lock(&hdr->block_mutex);
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synth_free_pages(hw, blk);
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__snd_util_mem_free(hdr, blk);
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mutex_unlock(&hdr->block_mutex);
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return 0;
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}
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EXPORT_SYMBOL(snd_trident_synth_free);
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/*
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* reset TLB entry and free kernel page
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*/
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static void clear_tlb(struct snd_trident *trident, int page)
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{
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void *ptr = page_to_ptr(trident, page);
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dma_addr_t addr = page_to_addr(trident, page);
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set_silent_tlb(trident, page);
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if (ptr) {
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struct snd_dma_buffer dmab;
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dmab.dev.type = SNDRV_DMA_TYPE_DEV;
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dmab.dev.dev = snd_dma_pci_data(trident->pci);
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dmab.area = ptr;
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dmab.addr = addr;
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dmab.bytes = ALIGN_PAGE_SIZE;
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snd_dma_free_pages(&dmab);
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}
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}
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/* check new allocation range */
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static void get_single_page_range(struct snd_util_memhdr *hdr,
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struct snd_util_memblk *blk,
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int *first_page_ret, int *last_page_ret)
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{
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struct list_head *p;
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struct snd_util_memblk *q;
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int first_page, last_page;
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first_page = firstpg(blk);
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if ((p = blk->list.prev) != &hdr->block) {
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q = list_entry(p, struct snd_util_memblk, list);
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if (lastpg(q) == first_page)
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first_page++; /* first page was already allocated */
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}
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last_page = lastpg(blk);
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if ((p = blk->list.next) != &hdr->block) {
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q = list_entry(p, struct snd_util_memblk, list);
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if (firstpg(q) == last_page)
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last_page--; /* last page was already allocated */
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}
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*first_page_ret = first_page;
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*last_page_ret = last_page;
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}
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/*
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* allocate kernel pages and assign them to TLB
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*/
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static int synth_alloc_pages(struct snd_trident *hw, struct snd_util_memblk *blk)
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{
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int page, first_page, last_page;
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struct snd_dma_buffer dmab;
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firstpg(blk) = get_aligned_page(blk->offset);
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lastpg(blk) = get_aligned_page(blk->offset + blk->size - 1);
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get_single_page_range(hw->tlb.memhdr, blk, &first_page, &last_page);
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/* allocate a kernel page for each Trident page -
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* fortunately Trident page size and kernel PAGE_SIZE is identical!
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*/
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for (page = first_page; page <= last_page; page++) {
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if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(hw->pci),
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ALIGN_PAGE_SIZE, &dmab) < 0)
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goto __fail;
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if (! is_valid_page(dmab.addr)) {
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snd_dma_free_pages(&dmab);
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goto __fail;
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}
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set_tlb_bus(hw, page, (unsigned long)dmab.area, dmab.addr);
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}
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return 0;
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__fail:
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/* release allocated pages */
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last_page = page - 1;
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for (page = first_page; page <= last_page; page++)
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clear_tlb(hw, page);
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return -ENOMEM;
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}
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/*
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* free pages
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*/
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static int synth_free_pages(struct snd_trident *trident, struct snd_util_memblk *blk)
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{
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int page, first_page, last_page;
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get_single_page_range(trident->tlb.memhdr, blk, &first_page, &last_page);
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for (page = first_page; page <= last_page; page++)
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clear_tlb(trident, page);
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return 0;
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}
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/*
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* copy_from_user(blk + offset, data, size)
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*/
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int snd_trident_synth_copy_from_user(struct snd_trident *trident,
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struct snd_util_memblk *blk,
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int offset, const char __user *data, int size)
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{
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int page, nextofs, end_offset, temp, temp1;
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offset += blk->offset;
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end_offset = offset + size;
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page = get_aligned_page(offset) + 1;
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do {
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nextofs = aligned_page_offset(page);
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temp = nextofs - offset;
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temp1 = end_offset - offset;
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if (temp1 < temp)
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temp = temp1;
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if (copy_from_user(offset_ptr(trident, offset), data, temp))
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return -EFAULT;
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offset = nextofs;
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data += temp;
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page++;
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} while (offset < end_offset);
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return 0;
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}
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EXPORT_SYMBOL(snd_trident_synth_copy_from_user);
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