diff options
Diffstat (limited to 'ANDROID_3.4.5/sound/pci/emu10k1/memory.c')
| -rw-r--r-- | ANDROID_3.4.5/sound/pci/emu10k1/memory.c | 573 |
1 files changed, 0 insertions, 573 deletions
diff --git a/ANDROID_3.4.5/sound/pci/emu10k1/memory.c b/ANDROID_3.4.5/sound/pci/emu10k1/memory.c deleted file mode 100644 index 4f502a2b..00000000 --- a/ANDROID_3.4.5/sound/pci/emu10k1/memory.c +++ /dev/null @@ -1,573 +0,0 @@ -/* - * Copyright (c) by Jaroslav Kysela <perex@perex.cz> - * Copyright (c) by Takashi Iwai <tiwai@suse.de> - * - * EMU10K1 memory page allocation (PTB area) - * - * - * 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 <linux/pci.h> -#include <linux/gfp.h> -#include <linux/time.h> -#include <linux/mutex.h> -#include <linux/export.h> - -#include <sound/core.h> -#include <sound/emu10k1.h> - -/* page arguments of these two macros are Emu page (4096 bytes), not like - * aligned pages in others - */ -#define __set_ptb_entry(emu,page,addr) \ - (((u32 *)(emu)->ptb_pages.area)[page] = cpu_to_le32(((addr) << 1) | (page))) - -#define UNIT_PAGES (PAGE_SIZE / EMUPAGESIZE) -#define MAX_ALIGN_PAGES (MAXPAGES / UNIT_PAGES) -/* get aligned page from offset address */ -#define get_aligned_page(offset) ((offset) >> PAGE_SHIFT) -/* get offset address from aligned page */ -#define aligned_page_offset(page) ((page) << PAGE_SHIFT) - -#if PAGE_SIZE == 4096 -/* page size == EMUPAGESIZE */ -/* fill PTB entrie(s) corresponding to page with addr */ -#define set_ptb_entry(emu,page,addr) __set_ptb_entry(emu,page,addr) -/* fill PTB entrie(s) corresponding to page with silence pointer */ -#define set_silent_ptb(emu,page) __set_ptb_entry(emu,page,emu->silent_page.addr) -#else -/* fill PTB entries -- we need to fill UNIT_PAGES entries */ -static inline void set_ptb_entry(struct snd_emu10k1 *emu, int page, dma_addr_t addr) -{ - int i; - page *= UNIT_PAGES; - for (i = 0; i < UNIT_PAGES; i++, page++) { - __set_ptb_entry(emu, page, addr); - addr += EMUPAGESIZE; - } -} -static inline void set_silent_ptb(struct snd_emu10k1 *emu, int page) -{ - int i; - page *= UNIT_PAGES; - for (i = 0; i < UNIT_PAGES; i++, page++) - /* do not increment ptr */ - __set_ptb_entry(emu, page, emu->silent_page.addr); -} -#endif /* PAGE_SIZE */ - - -/* - */ -static int synth_alloc_pages(struct snd_emu10k1 *hw, struct snd_emu10k1_memblk *blk); -static int synth_free_pages(struct snd_emu10k1 *hw, struct snd_emu10k1_memblk *blk); - -#define get_emu10k1_memblk(l,member) list_entry(l, struct snd_emu10k1_memblk, member) - - -/* initialize emu10k1 part */ -static void emu10k1_memblk_init(struct snd_emu10k1_memblk *blk) -{ - blk->mapped_page = -1; - INIT_LIST_HEAD(&blk->mapped_link); - INIT_LIST_HEAD(&blk->mapped_order_link); - blk->map_locked = 0; - - blk->first_page = get_aligned_page(blk->mem.offset); - blk->last_page = get_aligned_page(blk->mem.offset + blk->mem.size - 1); - blk->pages = blk->last_page - blk->first_page + 1; -} - -/* - * search empty region on PTB with the given size - * - * if an empty region is found, return the page and store the next mapped block - * in nextp - * if not found, return a negative error code. - */ -static int search_empty_map_area(struct snd_emu10k1 *emu, int npages, struct list_head **nextp) -{ - int page = 0, found_page = -ENOMEM; - int max_size = npages; - int size; - struct list_head *candidate = &emu->mapped_link_head; - struct list_head *pos; - - list_for_each (pos, &emu->mapped_link_head) { - struct snd_emu10k1_memblk *blk = get_emu10k1_memblk(pos, mapped_link); - if (blk->mapped_page < 0) - continue; - size = blk->mapped_page - page; - if (size == npages) { - *nextp = pos; - return page; - } - else if (size > max_size) { - /* we look for the maximum empty hole */ - max_size = size; - candidate = pos; - found_page = page; - } - page = blk->mapped_page + blk->pages; - } - size = MAX_ALIGN_PAGES - page; - if (size >= max_size) { - *nextp = pos; - return page; - } - *nextp = candidate; - return found_page; -} - -/* - * map a memory block onto emu10k1's PTB - * - * call with memblk_lock held - */ -static int map_memblk(struct snd_emu10k1 *emu, struct snd_emu10k1_memblk *blk) -{ - int page, pg; - struct list_head *next; - - page = search_empty_map_area(emu, blk->pages, &next); - if (page < 0) /* not found */ - return page; - /* insert this block in the proper position of mapped list */ - list_add_tail(&blk->mapped_link, next); - /* append this as a newest block in order list */ - list_add_tail(&blk->mapped_order_link, &emu->mapped_order_link_head); - blk->mapped_page = page; - /* fill PTB */ - for (pg = blk->first_page; pg <= blk->last_page; pg++) { - set_ptb_entry(emu, page, emu->page_addr_table[pg]); - page++; - } - return 0; -} - -/* - * unmap the block - * return the size of resultant empty pages - * - * call with memblk_lock held - */ -static int unmap_memblk(struct snd_emu10k1 *emu, struct snd_emu10k1_memblk *blk) -{ - int start_page, end_page, mpage, pg; - struct list_head *p; - struct snd_emu10k1_memblk *q; - - /* calculate the expected size of empty region */ - if ((p = blk->mapped_link.prev) != &emu->mapped_link_head) { - q = get_emu10k1_memblk(p, mapped_link); - start_page = q->mapped_page + q->pages; - } else - start_page = 0; - if ((p = blk->mapped_link.next) != &emu->mapped_link_head) { - q = get_emu10k1_memblk(p, mapped_link); - end_page = q->mapped_page; - } else - end_page = MAX_ALIGN_PAGES; - - /* remove links */ - list_del(&blk->mapped_link); - list_del(&blk->mapped_order_link); - /* clear PTB */ - mpage = blk->mapped_page; - for (pg = blk->first_page; pg <= blk->last_page; pg++) { - set_silent_ptb(emu, mpage); - mpage++; - } - blk->mapped_page = -1; - return end_page - start_page; /* return the new empty size */ -} - -/* - * search empty pages with the given size, and create a memory block - * - * unlike synth_alloc the memory block is aligned to the page start - */ -static struct snd_emu10k1_memblk * -search_empty(struct snd_emu10k1 *emu, int size) -{ - struct list_head *p; - struct snd_emu10k1_memblk *blk; - int page, psize; - - psize = get_aligned_page(size + PAGE_SIZE -1); - page = 0; - list_for_each(p, &emu->memhdr->block) { - blk = get_emu10k1_memblk(p, mem.list); - if (page + psize <= blk->first_page) - goto __found_pages; - page = blk->last_page + 1; - } - if (page + psize > emu->max_cache_pages) - return NULL; - -__found_pages: - /* create a new memory block */ - blk = (struct snd_emu10k1_memblk *)__snd_util_memblk_new(emu->memhdr, psize << PAGE_SHIFT, p->prev); - if (blk == NULL) - return NULL; - blk->mem.offset = aligned_page_offset(page); /* set aligned offset */ - emu10k1_memblk_init(blk); - return blk; -} - - -/* - * check if the given pointer is valid for pages - */ -static int is_valid_page(struct snd_emu10k1 *emu, dma_addr_t addr) -{ - if (addr & ~emu->dma_mask) { - snd_printk(KERN_ERR "max memory size is 0x%lx (addr = 0x%lx)!!\n", emu->dma_mask, (unsigned long)addr); - return 0; - } - if (addr & (EMUPAGESIZE-1)) { - snd_printk(KERN_ERR "page is not aligned\n"); - return 0; - } - return 1; -} - -/* - * map the given memory block on PTB. - * if the block is already mapped, update the link order. - * if no empty pages are found, tries to release unused memory blocks - * and retry the mapping. - */ -int snd_emu10k1_memblk_map(struct snd_emu10k1 *emu, struct snd_emu10k1_memblk *blk) -{ - int err; - int size; - struct list_head *p, *nextp; - struct snd_emu10k1_memblk *deleted; - unsigned long flags; - - spin_lock_irqsave(&emu->memblk_lock, flags); - if (blk->mapped_page >= 0) { - /* update order link */ - list_del(&blk->mapped_order_link); - list_add_tail(&blk->mapped_order_link, &emu->mapped_order_link_head); - spin_unlock_irqrestore(&emu->memblk_lock, flags); - return 0; - } - if ((err = map_memblk(emu, blk)) < 0) { - /* no enough page - try to unmap some blocks */ - /* starting from the oldest block */ - p = emu->mapped_order_link_head.next; - for (; p != &emu->mapped_order_link_head; p = nextp) { - nextp = p->next; - deleted = get_emu10k1_memblk(p, mapped_order_link); - if (deleted->map_locked) - continue; - size = unmap_memblk(emu, deleted); - if (size >= blk->pages) { - /* ok the empty region is enough large */ - err = map_memblk(emu, blk); - break; - } - } - } - spin_unlock_irqrestore(&emu->memblk_lock, flags); - return err; -} - -EXPORT_SYMBOL(snd_emu10k1_memblk_map); - -/* - * page allocation for DMA - */ -struct snd_util_memblk * -snd_emu10k1_alloc_pages(struct snd_emu10k1 *emu, struct snd_pcm_substream *substream) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - struct snd_util_memhdr *hdr; - struct snd_emu10k1_memblk *blk; - int page, err, idx; - - if (snd_BUG_ON(!emu)) - return NULL; - if (snd_BUG_ON(runtime->dma_bytes <= 0 || - runtime->dma_bytes >= MAXPAGES * EMUPAGESIZE)) - return NULL; - hdr = emu->memhdr; - if (snd_BUG_ON(!hdr)) - return NULL; - - idx = runtime->period_size >= runtime->buffer_size ? - (emu->delay_pcm_irq * 2) : 0; - mutex_lock(&hdr->block_mutex); - blk = search_empty(emu, runtime->dma_bytes + idx); - if (blk == NULL) { - mutex_unlock(&hdr->block_mutex); - return NULL; - } - /* fill buffer addresses but pointers are not stored so that - * snd_free_pci_page() is not called in in synth_free() - */ - idx = 0; - for (page = blk->first_page; page <= blk->last_page; page++, idx++) { - unsigned long ofs = idx << PAGE_SHIFT; - dma_addr_t addr; - addr = snd_pcm_sgbuf_get_addr(substream, ofs); - if (! is_valid_page(emu, addr)) { - printk(KERN_ERR "emu: failure page = %d\n", idx); - mutex_unlock(&hdr->block_mutex); - return NULL; - } - emu->page_addr_table[page] = addr; - emu->page_ptr_table[page] = NULL; - } - - /* set PTB entries */ - blk->map_locked = 1; /* do not unmap this block! */ - err = snd_emu10k1_memblk_map(emu, blk); - if (err < 0) { - __snd_util_mem_free(hdr, (struct snd_util_memblk *)blk); - mutex_unlock(&hdr->block_mutex); - return NULL; - } - mutex_unlock(&hdr->block_mutex); - return (struct snd_util_memblk *)blk; -} - - -/* - * release DMA buffer from page table - */ -int snd_emu10k1_free_pages(struct snd_emu10k1 *emu, struct snd_util_memblk *blk) -{ - if (snd_BUG_ON(!emu || !blk)) - return -EINVAL; - return snd_emu10k1_synth_free(emu, blk); -} - - -/* - * memory allocation using multiple pages (for synth) - * Unlike the DMA allocation above, non-contiguous pages are assined. - */ - -/* - * allocate a synth sample area - */ -struct snd_util_memblk * -snd_emu10k1_synth_alloc(struct snd_emu10k1 *hw, unsigned int size) -{ - struct snd_emu10k1_memblk *blk; - struct snd_util_memhdr *hdr = hw->memhdr; - - mutex_lock(&hdr->block_mutex); - blk = (struct snd_emu10k1_memblk *)__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, (struct snd_util_memblk *)blk); - mutex_unlock(&hdr->block_mutex); - return NULL; - } - snd_emu10k1_memblk_map(hw, blk); - mutex_unlock(&hdr->block_mutex); - return (struct snd_util_memblk *)blk; -} - -EXPORT_SYMBOL(snd_emu10k1_synth_alloc); - -/* - * free a synth sample area - */ -int -snd_emu10k1_synth_free(struct snd_emu10k1 *emu, struct snd_util_memblk *memblk) -{ - struct snd_util_memhdr *hdr = emu->memhdr; - struct snd_emu10k1_memblk *blk = (struct snd_emu10k1_memblk *)memblk; - unsigned long flags; - - mutex_lock(&hdr->block_mutex); - spin_lock_irqsave(&emu->memblk_lock, flags); - if (blk->mapped_page >= 0) - unmap_memblk(emu, blk); - spin_unlock_irqrestore(&emu->memblk_lock, flags); - synth_free_pages(emu, blk); - __snd_util_mem_free(hdr, memblk); - mutex_unlock(&hdr->block_mutex); - return 0; -} - -EXPORT_SYMBOL(snd_emu10k1_synth_free); - -/* check new allocation range */ -static void get_single_page_range(struct snd_util_memhdr *hdr, - struct snd_emu10k1_memblk *blk, - int *first_page_ret, int *last_page_ret) -{ - struct list_head *p; - struct snd_emu10k1_memblk *q; - int first_page, last_page; - first_page = blk->first_page; - if ((p = blk->mem.list.prev) != &hdr->block) { - q = get_emu10k1_memblk(p, mem.list); - if (q->last_page == first_page) - first_page++; /* first page was already allocated */ - } - last_page = blk->last_page; - if ((p = blk->mem.list.next) != &hdr->block) { - q = get_emu10k1_memblk(p, mem.list); - if (q->first_page == last_page) - last_page--; /* last page was already allocated */ - } - *first_page_ret = first_page; - *last_page_ret = last_page; -} - -/* release allocated pages */ -static void __synth_free_pages(struct snd_emu10k1 *emu, int first_page, - int last_page) -{ - int page; - - for (page = first_page; page <= last_page; page++) { - free_page((unsigned long)emu->page_ptr_table[page]); - emu->page_addr_table[page] = 0; - emu->page_ptr_table[page] = NULL; - } -} - -/* - * allocate kernel pages - */ -static int synth_alloc_pages(struct snd_emu10k1 *emu, struct snd_emu10k1_memblk *blk) -{ - int page, first_page, last_page; - - emu10k1_memblk_init(blk); - get_single_page_range(emu->memhdr, blk, &first_page, &last_page); - /* allocate kernel pages */ - for (page = first_page; page <= last_page; page++) { - /* first try to allocate from <4GB zone */ - struct page *p = alloc_page(GFP_KERNEL | GFP_DMA32 | - __GFP_NOWARN); - if (!p || (page_to_pfn(p) & ~(emu->dma_mask >> PAGE_SHIFT))) { - if (p) - __free_page(p); - /* try to allocate from <16MB zone */ - p = alloc_page(GFP_ATOMIC | GFP_DMA | - __GFP_NORETRY | /* no OOM-killer */ - __GFP_NOWARN); - } - if (!p) { - __synth_free_pages(emu, first_page, page - 1); - return -ENOMEM; - } - emu->page_addr_table[page] = page_to_phys(p); - emu->page_ptr_table[page] = page_address(p); - } - return 0; -} - -/* - * free pages - */ -static int synth_free_pages(struct snd_emu10k1 *emu, struct snd_emu10k1_memblk *blk) -{ - int first_page, last_page; - - get_single_page_range(emu->memhdr, blk, &first_page, &last_page); - __synth_free_pages(emu, first_page, last_page); - return 0; -} - -/* calculate buffer pointer from offset address */ -static inline void *offset_ptr(struct snd_emu10k1 *emu, int page, int offset) -{ - char *ptr; - if (snd_BUG_ON(page < 0 || page >= emu->max_cache_pages)) - return NULL; - ptr = emu->page_ptr_table[page]; - if (! ptr) { - printk(KERN_ERR "emu10k1: access to NULL ptr: page = %d\n", page); - return NULL; - } - ptr += offset & (PAGE_SIZE - 1); - return (void*)ptr; -} - -/* - * bzero(blk + offset, size) - */ -int snd_emu10k1_synth_bzero(struct snd_emu10k1 *emu, struct snd_util_memblk *blk, - int offset, int size) -{ - int page, nextofs, end_offset, temp, temp1; - void *ptr; - struct snd_emu10k1_memblk *p = (struct snd_emu10k1_memblk *)blk; - - offset += blk->offset & (PAGE_SIZE - 1); - end_offset = offset + size; - page = get_aligned_page(offset); - do { - nextofs = aligned_page_offset(page + 1); - temp = nextofs - offset; - temp1 = end_offset - offset; - if (temp1 < temp) - temp = temp1; - ptr = offset_ptr(emu, page + p->first_page, offset); - if (ptr) - memset(ptr, 0, temp); - offset = nextofs; - page++; - } while (offset < end_offset); - return 0; -} - -EXPORT_SYMBOL(snd_emu10k1_synth_bzero); - -/* - * copy_from_user(blk + offset, data, size) - */ -int snd_emu10k1_synth_copy_from_user(struct snd_emu10k1 *emu, struct snd_util_memblk *blk, - int offset, const char __user *data, int size) -{ - int page, nextofs, end_offset, temp, temp1; - void *ptr; - struct snd_emu10k1_memblk *p = (struct snd_emu10k1_memblk *)blk; - - offset += blk->offset & (PAGE_SIZE - 1); - end_offset = offset + size; - page = get_aligned_page(offset); - do { - nextofs = aligned_page_offset(page + 1); - temp = nextofs - offset; - temp1 = end_offset - offset; - if (temp1 < temp) - temp = temp1; - ptr = offset_ptr(emu, page + p->first_page, offset); - if (ptr && copy_from_user(ptr, data, temp)) - return -EFAULT; - offset = nextofs; - data += temp; - page++; - } while (offset < end_offset); - return 0; -} - -EXPORT_SYMBOL(snd_emu10k1_synth_copy_from_user); |