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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 | // SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (c) by Jaroslav Kysela <perex@perex.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. */ #include <linux/io.h> #include <linux/pci.h> #include <linux/time.h> #include <linux/mutex.h> #include <sound/core.h> #include "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,addr) \ (trident)->tlb.entries[page] = cpu_to_le32((addr) & ~(SNDRV_TRIDENT_PAGE_SIZE-1)) #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,addr) __set_tlb_bus(trident,page,addr) /* fill TLB entrie(s) corresponding to page with silence pointer */ #define set_silent_tlb(trident,page) __set_tlb_bus(trident, page, 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 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_addr(trident,page) __tlb_to_addr(trident, (page) << 1) /* fill TLB entries -- we need to fill two entries */ static inline void set_tlb_bus(struct snd_trident *trident, int page, dma_addr_t addr) { page <<= 1; __set_tlb_bus(trident, page, addr); __set_tlb_bus(trident, page+1, addr + SNDRV_TRIDENT_PAGE_SIZE); } static inline void set_silent_tlb(struct snd_trident *trident, int page) { page <<= 1; __set_tlb_bus(trident, page, trident->tlb.silent_page->addr); __set_tlb_bus(trident, page+1, 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_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(struct snd_trident *trident, int page, dma_addr_t addr) { int i; page *= UNIT_PAGES; for (i = 0; i < UNIT_PAGES; i++, page++) { __set_tlb_bus(trident, page, addr); addr += SNDRV_TRIDENT_PAGE_SIZE; } } static inline void set_silent_tlb(struct snd_trident *trident, int page) { int i; page *= UNIT_PAGES; for (i = 0; i < UNIT_PAGES; i++, page++) __set_tlb_bus(trident, page, trident->tlb.silent_page->addr); } #endif /* PAGE_SIZE */ /* first and last (aligned) pages of memory block */ #define firstpg(blk) (((struct snd_trident_memblk_arg *)snd_util_memblk_argptr(blk))->first_page) #define lastpg(blk) (((struct snd_trident_memblk_arg *)snd_util_memblk_argptr(blk))->last_page) /* * search empty pages which may contain given size */ static struct snd_util_memblk * search_empty(struct snd_util_memhdr *hdr, int size) { struct snd_util_memblk *blk; int page, psize; struct list_head *p; psize = get_aligned_page(size + ALIGN_PAGE_SIZE -1); page = 0; list_for_each(p, &hdr->block) { blk = list_entry(p, struct snd_util_memblk, 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(KERN_ERR "max memory size is 1GB!!\n"); return 0; } if (ptr & (SNDRV_TRIDENT_PAGE_SIZE-1)) { snd_printk(KERN_ERR "page is not aligned\n"); return 0; } return 1; } /* * page allocation for DMA (Scatter-Gather version) */ static struct snd_util_memblk * snd_trident_alloc_sg_pages(struct snd_trident *trident, struct snd_pcm_substream *substream) { struct snd_util_memhdr *hdr; struct snd_util_memblk *blk; struct snd_pcm_runtime *runtime = substream->runtime; int idx, page; 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; if (snd_BUG_ON(!hdr)) return NULL; mutex_lock(&hdr->block_mutex); blk = search_empty(hdr, runtime->dma_bytes); if (blk == NULL) { mutex_unlock(&hdr->block_mutex); return NULL; } /* set TLB entries */ idx = 0; for (page = firstpg(blk); page <= lastpg(blk); page++, idx++) { unsigned long ofs = idx << PAGE_SHIFT; dma_addr_t addr = snd_pcm_sgbuf_get_addr(substream, ofs); if (! is_valid_page(addr)) { __snd_util_mem_free(hdr, blk); mutex_unlock(&hdr->block_mutex); return NULL; } set_tlb_bus(trident, page, addr); } mutex_unlock(&hdr->block_mutex); return blk; } /* * page allocation for DMA (contiguous version) */ static struct snd_util_memblk * snd_trident_alloc_cont_pages(struct snd_trident *trident, struct snd_pcm_substream *substream) { struct snd_util_memhdr *hdr; struct snd_util_memblk *blk; int page; struct snd_pcm_runtime *runtime = substream->runtime; dma_addr_t addr; 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; if (snd_BUG_ON(!hdr)) return NULL; mutex_lock(&hdr->block_mutex); blk = search_empty(hdr, runtime->dma_bytes); if (blk == NULL) { mutex_unlock(&hdr->block_mutex); return NULL; } /* set TLB entries */ addr = runtime->dma_addr; for (page = firstpg(blk); page <= lastpg(blk); page++, addr += SNDRV_TRIDENT_PAGE_SIZE) { if (! is_valid_page(addr)) { __snd_util_mem_free(hdr, blk); mutex_unlock(&hdr->block_mutex); return NULL; } set_tlb_bus(trident, page, addr); } mutex_unlock(&hdr->block_mutex); return blk; } /* * page allocation for DMA */ struct snd_util_memblk * snd_trident_alloc_pages(struct snd_trident *trident, struct snd_pcm_substream *substream) { 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 return snd_trident_alloc_cont_pages(trident, substream); } /* * release DMA buffer from page table */ int snd_trident_free_pages(struct snd_trident *trident, struct snd_util_memblk *blk) { struct snd_util_memhdr *hdr; int page; if (snd_BUG_ON(!trident || !blk)) return -EINVAL; hdr = trident->tlb.memhdr; mutex_lock(&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); mutex_unlock(&hdr->block_mutex); return 0; } |