pci/trident/trident_memory.c

7  *  Trident 4DWave-NX memory page allocation (TLB area)
19 /* page arguments of these two macros are Trident page (4096 bytes), not like
22 #define __set_tlb_bus(trident,page,addr) \
23 	(trident)->tlb.entries[page] = cpu_to_le32((addr) & ~(SNDRV_TRIDENT_PAGE_SIZE-1))
24 #define __tlb_to_addr(trident,page) \
25 	(dma_addr_t)le32_to_cpu((trident->tlb.entries[page]) & ~(SNDRV_TRIDENT_PAGE_SIZE - 1))
28 /* page size == SNDRV_TRIDENT_PAGE_SIZE */
29 #define ALIGN_PAGE_SIZE		PAGE_SIZE	/* minimum page size for allocation */
31 /* fill TLB entrie(s) corresponding to page with ptr */
32 #define set_tlb_bus(trident,page,addr) __set_tlb_bus(trident,page,addr)
33 /* fill TLB entrie(s) corresponding to page with silence pointer */
34 #define set_silent_tlb(trident,page)	__set_tlb_bus(trident, page, trident->tlb.silent_page->addr)
35 /* get aligned page from offset address */
37 /* get offset address from aligned page */
38 #define aligned_page_offset(page)	((page) << 12)
39 /* get PCI physical address from aligned page */
40 #define page_to_addr(trident,page)	__tlb_to_addr(trident, page)
43 /* page size == SNDRV_TRIDENT_PAGE_SIZE x 2*/
47 #define aligned_page_offset(page)	((page) << 13)
48 #define page_to_addr(trident,page)	__tlb_to_addr(trident, (page) << 1)
51 static inline void set_tlb_bus(struct snd_trident *trident, int page,
54 	page <<= 1;
55 	__set_tlb_bus(trident, page, addr);
56 	__set_tlb_bus(trident, page+1, addr + SNDRV_TRIDENT_PAGE_SIZE);
58 static inline void set_silent_tlb(struct snd_trident *trident, int page)
60 	page <<= 1;
61 	__set_tlb_bus(trident, page, trident->tlb.silent_page->addr);
62 	__set_tlb_bus(trident, page+1, trident->tlb.silent_page->addr);
72  * of accessing page in set_tlb_bus and set_silent_tlb.  search_empty()
76 #define aligned_page_offset(page)	((page) * ALIGN_PAGE_SIZE)
77 #define page_to_addr(trident,page)	__tlb_to_addr(trident, (page) * UNIT_PAGES)
80 static inline void set_tlb_bus(struct snd_trident *trident, int page,
84 	page *= UNIT_PAGES;
85 	for (i = 0; i < UNIT_PAGES; i++, page++) {
86 		__set_tlb_bus(trident, page, addr);
90 static inline void set_silent_tlb(struct snd_trident *trident, int page)
93 	page *= UNIT_PAGES;
94 	for (i = 0; i < UNIT_PAGES; i++, page++)
95 		__set_tlb_bus(trident, page, trident->tlb.silent_page->addr);
111 	int page, psize;
115 	page = 0;
118 		if (page + psize <= firstpg(blk))
120 		page = lastpg(blk) + 1;
122 	if (page + psize > MAX_ALIGN_PAGES)
130 	blk->offset = aligned_page_offset(page); /* set aligned offset */
131 	firstpg(blk) = page;
132 	lastpg(blk) = page + psize - 1;
147 		snd_printk(KERN_ERR "page is not aligned\n");
154  * page allocation for DMA (Scatter-Gather version)
163 	int idx, page;
184 	for (page = firstpg(blk); page <= lastpg(blk); page++, idx++) {
192 		set_tlb_bus(trident, page, addr);
199  * page allocation for DMA (contiguous version)
207 	int page;
228 	for (page = firstpg(blk); page <= lastpg(blk); page++,
235 		set_tlb_bus(trident, page, addr);
242  * page allocation for DMA
258  * release DMA buffer from page table
264 	int page;
272 	for (page = firstpg(blk); page <= lastpg(blk); page++)
273 		set_silent_tlb(trident, page);