diff options
Diffstat (limited to 'sound/pci/trident/trident_memory.c')
| -rw-r--r-- | sound/pci/trident/trident_memory.c | 476 |
1 files changed, 476 insertions, 0 deletions
diff --git a/sound/pci/trident/trident_memory.c b/sound/pci/trident/trident_memory.c new file mode 100644 index 00000000000..6cc282681e0 --- /dev/null +++ b/sound/pci/trident/trident_memory.c @@ -0,0 +1,476 @@ +/* + * Copyright (c) by Jaroslav Kysela <perex@suse.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 <sound/driver.h> +#include <asm/io.h> +#include <linux/pci.h> +#include <linux/time.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(trident_t *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(trident_t *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(trident_t *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(trident_t *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 */ +inline static void *offset_ptr(trident_t *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) (((snd_trident_memblk_arg_t*)snd_util_memblk_argptr(blk))->first_page) +#define lastpg(blk) (((snd_trident_memblk_arg_t*)snd_util_memblk_argptr(blk))->last_page) + +/* + * search empty pages which may contain given size + */ +static snd_util_memblk_t * +search_empty(snd_util_memhdr_t *hdr, int size) +{ + snd_util_memblk_t *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, snd_util_memblk_t, 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("max memory size is 1GB!!\n"); + return 0; + } + if (ptr & (SNDRV_TRIDENT_PAGE_SIZE-1)) { + snd_printk("page is not aligned\n"); + return 0; + } + return 1; +} + +/* + * page allocation for DMA (Scatter-Gather version) + */ +static snd_util_memblk_t * +snd_trident_alloc_sg_pages(trident_t *trident, snd_pcm_substream_t *substream) +{ + snd_util_memhdr_t *hdr; + snd_util_memblk_t *blk; + snd_pcm_runtime_t *runtime = substream->runtime; + int idx, page; + struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream); + + snd_assert(runtime->dma_bytes > 0 && runtime->dma_bytes <= SNDRV_TRIDENT_MAX_PAGES * SNDRV_TRIDENT_PAGE_SIZE, return NULL); + hdr = trident->tlb.memhdr; + snd_assert(hdr != NULL, return NULL); + + + + down(&hdr->block_mutex); + blk = search_empty(hdr, runtime->dma_bytes); + if (blk == NULL) { + up(&hdr->block_mutex); + return NULL; + } + if (lastpg(blk) - firstpg(blk) >= sgbuf->pages) { + snd_printk(KERN_ERR "page calculation doesn't match: allocated pages = %d, trident = %d/%d\n", sgbuf->pages, firstpg(blk), lastpg(blk)); + __snd_util_mem_free(hdr, blk); + up(&hdr->block_mutex); + return NULL; + } + + /* set TLB entries */ + idx = 0; + for (page = firstpg(blk); page <= lastpg(blk); page++, idx++) { + dma_addr_t addr = sgbuf->table[idx].addr; + unsigned long ptr = (unsigned long)sgbuf->table[idx].buf; + if (! is_valid_page(addr)) { + __snd_util_mem_free(hdr, blk); + up(&hdr->block_mutex); + return NULL; + } + set_tlb_bus(trident, page, ptr, addr); + } + up(&hdr->block_mutex); + return blk; +} + +/* + * page allocation for DMA (contiguous version) + */ +static snd_util_memblk_t * +snd_trident_alloc_cont_pages(trident_t *trident, snd_pcm_substream_t *substream) +{ + snd_util_memhdr_t *hdr; + snd_util_memblk_t *blk; + int page; + snd_pcm_runtime_t *runtime = substream->runtime; + dma_addr_t addr; + unsigned long ptr; + + snd_assert(runtime->dma_bytes> 0 && runtime->dma_bytes <= SNDRV_TRIDENT_MAX_PAGES * SNDRV_TRIDENT_PAGE_SIZE, return NULL); + hdr = trident->tlb.memhdr; + snd_assert(hdr != NULL, return NULL); + + down(&hdr->block_mutex); + blk = search_empty(hdr, runtime->dma_bytes); + if (blk == NULL) { + up(&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); + up(&hdr->block_mutex); + return NULL; + } + set_tlb_bus(trident, page, ptr, addr); + } + up(&hdr->block_mutex); + return blk; +} + +/* + * page allocation for DMA + */ +snd_util_memblk_t * +snd_trident_alloc_pages(trident_t *trident, snd_pcm_substream_t *substream) +{ + snd_assert(trident != NULL, return NULL); + snd_assert(substream != NULL, 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(trident_t *trident, snd_util_memblk_t *blk) +{ + snd_util_memhdr_t *hdr; + int page; + + snd_assert(trident != NULL, return -EINVAL); + snd_assert(blk != NULL, return -EINVAL); + + hdr = trident->tlb.memhdr; + down(&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); + up(&hdr->block_mutex); + return 0; +} + + +/*---------------------------------------------------------------- + * memory allocation using multiple pages (for synth) + *---------------------------------------------------------------- + * Unlike the DMA allocation above, non-contiguous pages are + * assigned to TLB. + *----------------------------------------------------------------*/ + +/* + */ +static int synth_alloc_pages(trident_t *hw, snd_util_memblk_t *blk); +static int synth_free_pages(trident_t *hw, snd_util_memblk_t *blk); + +/* + * allocate a synth sample area + */ +snd_util_memblk_t * +snd_trident_synth_alloc(trident_t *hw, unsigned int size) +{ + snd_util_memblk_t *blk; + snd_util_memhdr_t *hdr = hw->tlb.memhdr; + + down(&hdr->block_mutex); + blk = __snd_util_mem_alloc(hdr, size); + if (blk == NULL) { + up(&hdr->block_mutex); + return NULL; + } + if (synth_alloc_pages(hw, blk)) { + __snd_util_mem_free(hdr, blk); + up(&hdr->block_mutex); + return NULL; + } + up(&hdr->block_mutex); + return blk; +} + + +/* + * free a synth sample area + */ +int +snd_trident_synth_free(trident_t *hw, snd_util_memblk_t *blk) +{ + snd_util_memhdr_t *hdr = hw->tlb.memhdr; + + down(&hdr->block_mutex); + synth_free_pages(hw, blk); + __snd_util_mem_free(hdr, blk); + up(&hdr->block_mutex); + return 0; +} + + +/* + * reset TLB entry and free kernel page + */ +static void clear_tlb(trident_t *trident, int page) +{ + void *ptr = page_to_ptr(trident, page); + dma_addr_t addr = page_to_addr(trident, page); + set_silent_tlb(trident, page); + if (ptr) { + struct snd_dma_buffer dmab; + dmab.dev.type = SNDRV_DMA_TYPE_DEV; + dmab.dev.dev = snd_dma_pci_data(trident->pci); + dmab.area = ptr; + dmab.addr = addr; + dmab.bytes = ALIGN_PAGE_SIZE; + snd_dma_free_pages(&dmab); + } +} + +/* check new allocation range */ +static void get_single_page_range(snd_util_memhdr_t *hdr, snd_util_memblk_t *blk, int *first_page_ret, int *last_page_ret) +{ + struct list_head *p; + snd_util_memblk_t *q; + int first_page, last_page; + first_page = firstpg(blk); + if ((p = blk->list.prev) != &hdr->block) { + q = list_entry(p, snd_util_memblk_t, list); + if (lastpg(q) == first_page) + first_page++; /* first page was already allocated */ + } + last_page = lastpg(blk); + if ((p = blk->list.next) != &hdr->block) { + q = list_entry(p, snd_util_memblk_t, list); + if (firstpg(q) == last_page) + last_page--; /* last page was already allocated */ + } + *first_page_ret = first_page; + *last_page_ret = last_page; +} + +/* + * allocate kernel pages and assign them to TLB + */ +static int synth_alloc_pages(trident_t *hw, snd_util_memblk_t *blk) +{ + int page, first_page, last_page; + struct snd_dma_buffer dmab; + + firstpg(blk) = get_aligned_page(blk->offset); + lastpg(blk) = get_aligned_page(blk->offset + blk->size - 1); + get_single_page_range(hw->tlb.memhdr, blk, &first_page, &last_page); + + /* allocate a kernel page for each Trident page - + * fortunately Trident page size and kernel PAGE_SIZE is identical! + */ + for (page = first_page; page <= last_page; page++) { + if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(hw->pci), + ALIGN_PAGE_SIZE, &dmab) < 0) + goto __fail; + if (! is_valid_page(dmab.addr)) { + snd_dma_free_pages(&dmab); + goto __fail; + } + set_tlb_bus(hw, page, (unsigned long)dmab.area, dmab.addr); + } + return 0; + +__fail: + /* release allocated pages */ + last_page = page - 1; + for (page = first_page; page <= last_page; page++) + clear_tlb(hw, page); + + return -ENOMEM; +} + +/* + * free pages + */ +static int synth_free_pages(trident_t *trident, snd_util_memblk_t *blk) +{ + int page, first_page, last_page; + + get_single_page_range(trident->tlb.memhdr, blk, &first_page, &last_page); + for (page = first_page; page <= last_page; page++) + clear_tlb(trident, page); + + return 0; +} + +/* + * copy_from_user(blk + offset, data, size) + */ +int snd_trident_synth_copy_from_user(trident_t *trident, snd_util_memblk_t *blk, int offset, const char __user *data, int size) +{ + int page, nextofs, end_offset, temp, temp1; + + offset += blk->offset; + end_offset = offset + size; + page = get_aligned_page(offset) + 1; + do { + nextofs = aligned_page_offset(page); + temp = nextofs - offset; + temp1 = end_offset - offset; + if (temp1 < temp) + temp = temp1; + if (copy_from_user(offset_ptr(trident, offset), data, temp)) + return -EFAULT; + offset = nextofs; + data += temp; + page++; + } while (offset < end_offset); + return 0; +} + |