struct snd_util_memblk *blk;
struct snd_pcm_runtime *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);
+ 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;
- snd_assert(hdr != NULL, return NULL);
+ if (snd_BUG_ON(!hdr))
+ return NULL;
mutex_unlock(&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);
- mutex_unlock(&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;
+ 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);
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);
+ 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;
- snd_assert(hdr != NULL, return NULL);
+ if (snd_BUG_ON(!hdr))
+ return NULL;
mutex_lock(&hdr->block_mutex);
blk = search_empty(hdr, runtime->dma_bytes);
snd_trident_alloc_pages(struct snd_trident *trident,
struct snd_pcm_substream *substream)
{
- snd_assert(trident != NULL, return NULL);
- snd_assert(substream != NULL, return NULL);
+ 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
struct snd_util_memhdr *hdr;
int page;
- snd_assert(trident != NULL, return -EINVAL);
- snd_assert(blk != NULL, return -EINVAL);
+ if (snd_BUG_ON(!trident || !blk))
+ return -EINVAL;
hdr = trident->tlb.memhdr;
mutex_lock(&hdr->block_mutex);
mutex_unlock(&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(struct snd_trident *hw, struct snd_util_memblk *blk);
-static int synth_free_pages(struct snd_trident *hw, struct snd_util_memblk *blk);
-
-/*
- * allocate a synth sample area
- */
-struct snd_util_memblk *
-snd_trident_synth_alloc(struct snd_trident *hw, unsigned int size)
-{
- struct snd_util_memblk *blk;
- struct snd_util_memhdr *hdr = hw->tlb.memhdr;
-
- mutex_lock(&hdr->block_mutex);
- blk = __snd_util_mem_alloc(hdr, size);
- if (blk == NULL) {
- mutex_unlock(&hdr->block_mutex);
- return NULL;
- }
- if (synth_alloc_pages(hw, blk)) {
- __snd_util_mem_free(hdr, blk);
- mutex_unlock(&hdr->block_mutex);
- return NULL;
- }
- mutex_unlock(&hdr->block_mutex);
- return blk;
-}
-
-EXPORT_SYMBOL(snd_trident_synth_alloc);
-
-/*
- * free a synth sample area
- */
-int
-snd_trident_synth_free(struct snd_trident *hw, struct snd_util_memblk *blk)
-{
- struct snd_util_memhdr *hdr = hw->tlb.memhdr;
-
- mutex_lock(&hdr->block_mutex);
- synth_free_pages(hw, blk);
- __snd_util_mem_free(hdr, blk);
- mutex_unlock(&hdr->block_mutex);
- return 0;
-}
-
-EXPORT_SYMBOL(snd_trident_synth_free);
-
-/*
- * reset TLB entry and free kernel page
- */
-static void clear_tlb(struct snd_trident *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(struct snd_util_memhdr *hdr,
- struct snd_util_memblk *blk,
- int *first_page_ret, int *last_page_ret)
-{
- struct list_head *p;
- struct snd_util_memblk *q;
- int first_page, last_page;
- first_page = firstpg(blk);
- if ((p = blk->list.prev) != &hdr->block) {
- q = list_entry(p, struct snd_util_memblk, 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, struct snd_util_memblk, 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(struct snd_trident *hw, struct snd_util_memblk *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(struct snd_trident *trident, struct snd_util_memblk *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(struct snd_trident *trident,
- struct snd_util_memblk *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;
-}
-
-EXPORT_SYMBOL(snd_trident_synth_copy_from_user);
projects / linux-2.6-omap-h63xx.git / blobdiff