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-rw-r--r--dma/nwl_buffers.h393
1 files changed, 0 insertions, 393 deletions
diff --git a/dma/nwl_buffers.h b/dma/nwl_buffers.h
deleted file mode 100644
index 130c189..0000000
--- a/dma/nwl_buffers.h
+++ /dev/null
@@ -1,393 +0,0 @@
-#define NWL_RING_GET(data, offset) *(uint32_t*)(((char*)(data)) + (offset))
-#define NWL_RING_SET(data, offset, val) *(uint32_t*)(((char*)(data)) + (offset)) = (val)
-#define NWL_RING_UPDATE(data, offset, mask, val) *(uint32_t*)(((char*)(data)) + (offset)) = ((*(uint32_t*)(((char*)(data)) + (offset)))&(mask))|(val)
-
-int dma_nwl_sync_buffers(nwl_dma_t *ctx, pcilib_nwl_engine_description_t *info, pcilib_kmem_handle_t *kmem) {
- switch (info->desc.direction) {
- case PCILIB_DMA_FROM_DEVICE:
- return pcilib_sync_kernel_memory(ctx->pcilib, kmem, PCILIB_KMEM_SYNC_FROMDEVICE);
- case PCILIB_DMA_TO_DEVICE:
- return pcilib_sync_kernel_memory(ctx->pcilib, kmem, PCILIB_KMEM_SYNC_TODEVICE);
- }
-
- return 0;
-}
-
-static int dma_nwl_compute_read_s2c_pointers(nwl_dma_t *ctx, pcilib_nwl_engine_description_t *info, unsigned char *ring, uint32_t ring_pa) {
- size_t pos;
- uint32_t val;
-
- char *base = info->base_addr;
-
- nwl_read_register(val, ctx, base, REG_SW_NEXT_BD);
- if ((val < ring_pa)||((val - ring_pa) % PCILIB_NWL_DMA_DESCRIPTOR_SIZE)) {
- if (val < ring_pa) pcilib_warning("Inconsistent S2C DMA Ring buffer is found (REG_SW_NEXT_BD register value (%lx) is below start of ring [%lx,%lx])", val, ring_pa, PCILIB_NWL_DMA_DESCRIPTOR_SIZE);
- else pcilib_warning("Inconsistent S2C DMA Ring buffer is found (REG_SW_NEXT_BD register value (%zu / %u) is fractal)", val - ring_pa, PCILIB_NWL_DMA_DESCRIPTOR_SIZE);
- return PCILIB_ERROR_INVALID_STATE;
- }
-
- info->head = (val - ring_pa) / PCILIB_NWL_DMA_DESCRIPTOR_SIZE;
- if (info->head >= PCILIB_NWL_DMA_PAGES) {
- pcilib_warning("Inconsistent S2C DMA Ring buffer is found (REG_SW_NEXT_BD register value (%zu) out of range)", info->head);
- return PCILIB_ERROR_INVALID_STATE;
- }
-
- nwl_read_register(val, ctx, base, REG_DMA_ENG_NEXT_BD);
- if ((val < ring_pa)||((val - ring_pa) % PCILIB_NWL_DMA_DESCRIPTOR_SIZE)) {
- if (val < ring_pa) pcilib_warning("Inconsistent S2C DMA Ring buffer is found (REG_DMA_ENG_NEXT_BD register value (%lx) is below start of ring [%lx,%lx])", val, ring_pa, PCILIB_NWL_DMA_DESCRIPTOR_SIZE);
- else pcilib_warning("Inconsistent S2C DMA Ring buffer is found (REG_DMA_ENG_NEXT_BD register value (%zu / %u) is fractal)", val - ring_pa, PCILIB_NWL_DMA_DESCRIPTOR_SIZE);
- return PCILIB_ERROR_INVALID_STATE;
- }
-
- info->tail = (val - ring_pa) / PCILIB_NWL_DMA_DESCRIPTOR_SIZE;
- if (info->tail >= PCILIB_NWL_DMA_PAGES) {
- pcilib_warning("Inconsistent S2C DMA Ring buffer is found (REG_DMA_ENG_NEXT_BD register value (%zu) out of range)", info->tail);
- return PCILIB_ERROR_INVALID_STATE;
- }
-
- return 0;
-}
-
-static int dma_nwl_compute_read_c2s_pointers(nwl_dma_t *ctx, pcilib_nwl_engine_description_t *info, unsigned char *ring, uint32_t ring_pa) {
- size_t pos;
- uint32_t val;
- size_t prev;
-
- char *base = info->base_addr;
-
-
- nwl_read_register(val, ctx, base, REG_SW_NEXT_BD);
- if ((val < ring_pa)||((val - ring_pa) % PCILIB_NWL_DMA_DESCRIPTOR_SIZE)) {
- if (val < ring_pa) pcilib_warning("Inconsistent C2S DMA Ring buffer is found (REG_SW_NEXT_BD register value (%lx) is below start of the ring [%lx,%lx])", val, ring_pa, PCILIB_NWL_DMA_DESCRIPTOR_SIZE);
- else pcilib_warning("Inconsistent C2S DMA Ring buffer is found (REG_SW_NEXT_BD register value (%zu / %u) is fractal)", val - ring_pa, PCILIB_NWL_DMA_DESCRIPTOR_SIZE);
- return PCILIB_ERROR_INVALID_STATE;
- }
-
- info->head = (val - ring_pa) / PCILIB_NWL_DMA_DESCRIPTOR_SIZE;
- if (info->head >= PCILIB_NWL_DMA_PAGES) {
- pcilib_warning("Inconsistent C2S DMA Ring buffer is found (REG_SW_NEXT_BD register value (%zu) out of range)", info->head);
- return PCILIB_ERROR_INVALID_STATE;
- }
-
- info->tail = info->head;
-
-
- // Last read BD
- nwl_read_register(val, ctx, base, REG_DMA_ENG_LAST_BD);
- if ((val < ring_pa)||((val - ring_pa) % PCILIB_NWL_DMA_DESCRIPTOR_SIZE)) {
- if (val < ring_pa) pcilib_warning("Inconsistent C2S DMA Ring buffer is found (REG_DMA_ENG_LAST_BD register value (%lx) is below start of ring [%lx,%lx])", val, ring_pa, PCILIB_NWL_DMA_DESCRIPTOR_SIZE);
- else pcilib_warning("Inconsistent C2S DMA Ring buffer is found (REG_DMA_ENG_LAST_BD register value (%zu / %u) is fractal)", val - ring_pa, PCILIB_NWL_DMA_DESCRIPTOR_SIZE);
- return PCILIB_ERROR_INVALID_STATE;
- }
-
- prev = (val - ring_pa) / PCILIB_NWL_DMA_DESCRIPTOR_SIZE;
- if (prev >= PCILIB_NWL_DMA_PAGES) {
- pcilib_warning("Inconsistent C2S DMA Ring buffer is found (REG_DMA_ENG_LAST_BD register value (%zu) out of range)", prev);
- return PCILIB_ERROR_INVALID_STATE;
- }
-
-prev_buffer:
- val = NWL_RING_GET(ring + prev * PCILIB_NWL_DMA_DESCRIPTOR_SIZE, DMA_BD_BUFL_STATUS_OFFSET)&DMA_BD_STATUS_MASK;
-
- if (val & (DMA_BD_ERROR_MASK|DMA_BD_COMP_MASK)) {
- info->tail = prev;
-
- if (prev > 0) prev -= 1;
- else prev = PCILIB_NWL_DMA_PAGES - 1;
-
- if (prev != info->head) goto prev_buffer;
- }
-
- return 0;
-}
-
-
-static int dma_nwl_allocate_engine_buffers(nwl_dma_t *ctx, pcilib_nwl_engine_description_t *info) {
- int err = 0;
-
- int i;
- int preserve = 0;
- uint16_t sub_use;
- uint32_t val;
- uint32_t buf_sz;
- uint64_t buf_pa;
- pcilib_kmem_reuse_state_t reuse_ring, reuse_pages;
- pcilib_kmem_flags_t flags;
-
- char *base = info->base_addr;
-
- if (info->pages) return 0;
-
- // Or bidirectional specified by 0x0|addr, or read 0x0|addr and write 0x80|addr
- sub_use = info->desc.addr|((info->desc.direction == PCILIB_DMA_TO_DEVICE)?0x80:0x00);
- flags = PCILIB_KMEM_FLAG_REUSE|PCILIB_KMEM_FLAG_EXCLUSIVE|PCILIB_KMEM_FLAG_HARDWARE|(info->preserve?PCILIB_KMEM_FLAG_PERSISTENT:0);
-
- pcilib_kmem_handle_t *ring = pcilib_alloc_kernel_memory(ctx->pcilib, PCILIB_KMEM_TYPE_CONSISTENT, 1, PCILIB_NWL_DMA_PAGES * PCILIB_NWL_DMA_DESCRIPTOR_SIZE, PCILIB_NWL_ALIGNMENT, PCILIB_KMEM_USE(PCILIB_KMEM_USE_DMA_RING, sub_use), flags);
- pcilib_kmem_handle_t *pages = pcilib_alloc_kernel_memory(ctx->pcilib, PCILIB_KMEM_TYPE_PAGE, PCILIB_NWL_DMA_PAGES, 0, 0, PCILIB_KMEM_USE(PCILIB_KMEM_USE_DMA_PAGES, sub_use), flags);
-
- if ((ring)&&(pages)) err = dma_nwl_sync_buffers(ctx, info, pages);
- else err = PCILIB_ERROR_FAILED;
-
- if (err) {
- if (pages) pcilib_free_kernel_memory(ctx->pcilib, pages, 0);
- if (ring) pcilib_free_kernel_memory(ctx->pcilib, ring, 0);
- return err;
- }
-
- reuse_ring = pcilib_kmem_is_reused(ctx->pcilib, ring);
- reuse_pages = pcilib_kmem_is_reused(ctx->pcilib, pages);
-
- if (!info->preserve) {
- if (reuse_ring == reuse_pages) {
- if (reuse_ring & PCILIB_KMEM_REUSE_PARTIAL) pcilib_warning("Inconsistent DMA buffers are found (only part of required buffers is available), reinitializing...");
- else if (reuse_ring & PCILIB_KMEM_REUSE_REUSED) {
- if (reuse_ring & PCILIB_KMEM_REUSE_PERSISTENT == 0) pcilib_warning("Lost DMA buffers are found (non-persistent mode), reinitializing...");
- else if (reuse_ring & PCILIB_KMEM_REUSE_HARDWARE == 0) pcilib_warning("Lost DMA buffers are found (missing HW reference), reinitializing...");
- else {
- nwl_read_register(val, ctx, info->base_addr, REG_DMA_ENG_CTRL_STATUS);
- if (val&DMA_ENG_RUNNING == 0) pcilib_warning("Lost DMA buffers are found (DMA engine is stopped), reinitializing...");
- else preserve = 1;
- }
- }
- } else pcilib_warning("Inconsistent DMA buffers (modes of ring and page buffers does not match), reinitializing....");
- }
-
-
- unsigned char *data = (unsigned char*)pcilib_kmem_get_ua(ctx->pcilib, ring);
- uint32_t ring_pa = pcilib_kmem_get_pa(ctx->pcilib, ring);
-
- if (preserve) {
- if (info->desc.direction == PCILIB_DMA_FROM_DEVICE) err = dma_nwl_compute_read_c2s_pointers(ctx, info, data, ring_pa);
- else err = dma_nwl_compute_read_s2c_pointers(ctx, info, data, ring_pa);
-
- if (err) preserve = 0;
- }
-
- if (preserve)
- info->reused = 1;
- else {
- memset(data, 0, PCILIB_NWL_DMA_PAGES * PCILIB_NWL_DMA_DESCRIPTOR_SIZE);
-
- for (i = 0; i < PCILIB_NWL_DMA_PAGES; i++, data += PCILIB_NWL_DMA_DESCRIPTOR_SIZE) {
- buf_pa = pcilib_kmem_get_block_pa(ctx->pcilib, pages, i);
- buf_sz = pcilib_kmem_get_block_size(ctx->pcilib, pages, i);
-
- NWL_RING_SET(data, DMA_BD_NDESC_OFFSET, ring_pa + ((i + 1) % PCILIB_NWL_DMA_PAGES) * PCILIB_NWL_DMA_DESCRIPTOR_SIZE);
- NWL_RING_SET(data, DMA_BD_BUFAL_OFFSET, buf_pa&0xFFFFFFFF);
- NWL_RING_SET(data, DMA_BD_BUFAH_OFFSET, buf_pa>>32);
-#ifdef NWL_GENERATE_DMA_IRQ
- NWL_RING_SET(data, DMA_BD_BUFL_CTRL_OFFSET, buf_sz | DMA_BD_INT_ERROR_MASK | DMA_BD_INT_COMP_MASK);
-#else /* NWL_GENERATE_DMA_IRQ */
- NWL_RING_SET(data, DMA_BD_BUFL_CTRL_OFFSET, buf_sz);
-#endif /* NWL_GENERATE_DMA_IRQ */
- }
-
- val = ring_pa;
- nwl_write_register(val, ctx, base, REG_DMA_ENG_NEXT_BD);
- nwl_write_register(val, ctx, base, REG_SW_NEXT_BD);
-
- info->head = 0;
- info->tail = 0;
- }
-
- info->ring = ring;
- info->pages = pages;
- info->page_size = buf_sz;
- info->ring_size = PCILIB_NWL_DMA_PAGES;
-
-
- return 0;
-}
-
-
-static size_t dma_nwl_clean_buffers(nwl_dma_t * ctx, pcilib_nwl_engine_description_t *info) {
- size_t res = 0;
- uint32_t status, control;
-
- unsigned char *ring = pcilib_kmem_get_ua(ctx->pcilib, info->ring);
- ring += info->tail * PCILIB_NWL_DMA_DESCRIPTOR_SIZE;
-
-next_buffer:
- status = NWL_RING_GET(ring, DMA_BD_BUFL_STATUS_OFFSET)&DMA_BD_STATUS_MASK;
-// control = NWL_RING_GET(ring, DMA_BD_BUFL_CTRL_OFFSET)&DMA_BD_CTRL_MASK;
-
- if (status & DMA_BD_ERROR_MASK) {
- pcilib_error("NWL DMA Engine reported error in ring descriptor");
- return (size_t)-1;
- }
-
- if (status & DMA_BD_SHORT_MASK) {
- pcilib_error("NWL DMA Engine reported short error");
- return (size_t)-1;
- }
-
- if (status & DMA_BD_COMP_MASK) {
- info->tail++;
- if (info->tail == info->ring_size) {
- ring -= (info->tail - 1) * PCILIB_NWL_DMA_DESCRIPTOR_SIZE;
- info->tail = 0;
- } else {
- ring += PCILIB_NWL_DMA_DESCRIPTOR_SIZE;
- }
-
- res++;
-
- if (info->tail != info->head) goto next_buffer;
- }
-
-// printf("====> Cleaned: %i\n", res);
- return res;
-}
-
-
-static size_t dma_nwl_get_next_buffer(nwl_dma_t * ctx, pcilib_nwl_engine_description_t *info, size_t n_buffers, pcilib_timeout_t timeout) {
- struct timeval start, cur;
-
- size_t res, n = 0;
- size_t head;
-
- for (head = info->head; (((head + 1)%info->ring_size) != info->tail)&&(n < n_buffers); head++, n++);
- if (n == n_buffers) return info->head;
-
- gettimeofday(&start, NULL);
-
- res = dma_nwl_clean_buffers(ctx, info);
- if (res == (size_t)-1) return PCILIB_DMA_BUFFER_INVALID;
- else n += res;
-
-
- while (n < n_buffers) {
- if (timeout != PCILIB_TIMEOUT_INFINITE) {
- gettimeofday(&cur, NULL);
- if (((cur.tv_sec - start.tv_sec)*1000000 + (cur.tv_usec - start.tv_usec)) > timeout) break;
- }
-
- usleep (10);
-
- res = dma_nwl_clean_buffers(ctx, info);
- if (res == (size_t)-1) return PCILIB_DMA_BUFFER_INVALID;
- else if (res > 0) {
- gettimeofday(&start, NULL);
- n += res;
- }
- }
-
- if (n < n_buffers) return PCILIB_DMA_BUFFER_INVALID;
-
- return info->head;
-}
-
-static int dma_nwl_push_buffer(nwl_dma_t *ctx, pcilib_nwl_engine_description_t *info, size_t size, int eop, pcilib_timeout_t timeout) {
- int flags = 0;
-
- uint32_t val;
- unsigned char *ring = pcilib_kmem_get_ua(ctx->pcilib, info->ring);
- uint32_t ring_pa = pcilib_kmem_get_pa(ctx->pcilib, info->ring);
-
- ring += info->head * PCILIB_NWL_DMA_DESCRIPTOR_SIZE;
-
-
- if (!info->writting) {
- flags |= DMA_BD_SOP_MASK;
- info->writting = 1;
- }
- if (eop) {
- flags |= DMA_BD_EOP_MASK;
- info->writting = 0;
- }
-
- NWL_RING_SET(ring, DMA_BD_BUFL_CTRL_OFFSET, size|flags);
- NWL_RING_SET(ring, DMA_BD_BUFL_STATUS_OFFSET, size);
-
- info->head++;
- if (info->head == info->ring_size) info->head = 0;
-
- val = ring_pa + info->head * PCILIB_NWL_DMA_DESCRIPTOR_SIZE;
- nwl_write_register(val, ctx, info->base_addr, REG_SW_NEXT_BD);
-// nwl_read_register(val, ctx, info->base_addr, 0x18);
-
-// usleep(10000);
-
-// nwl_read_register(val, ctx, info->base_addr, REG_DMA_ENG_LAST_BD);
-// printf("Last BD(Write): %lx %lx\n", ring, val);
-
-
- return 0;
-}
-
-
-static size_t dma_nwl_wait_buffer(nwl_dma_t *ctx, pcilib_nwl_engine_description_t *info, size_t *size, int *eop, pcilib_timeout_t timeout) {
- uint32_t val;
- struct timeval start, cur;
- uint32_t status_size, status, control;
-
-// usleep(10000);
-
- unsigned char *ring = pcilib_kmem_get_ua(ctx->pcilib, info->ring);
-
-// status_size = NWL_RING_GET(ring, DMA_BD_BUFL_STATUS_OFFSET);
-// printf("Status0: %lx\n", status_size);
-
- ring += info->tail * PCILIB_NWL_DMA_DESCRIPTOR_SIZE;
-
- gettimeofday(&start, NULL);
-
-// printf("Waiting %li\n", info->tail);
-// nwl_read_register(val, ctx, info->base_addr, REG_DMA_ENG_LAST_BD);
-// printf("Last BD(Read): %lx %lx\n", ring, val);
-
- do {
- status_size = NWL_RING_GET(ring, DMA_BD_BUFL_STATUS_OFFSET);
- status = status_size & DMA_BD_STATUS_MASK;
-
-// printf("%i: %lx\n", info->tail, status_size);
-
- if (status & DMA_BD_ERROR_MASK) {
- pcilib_error("NWL DMA Engine reported error in ring descriptor");
- return (size_t)-1;
- }
-
- if (status & DMA_BD_COMP_MASK) {
- if (status & DMA_BD_EOP_MASK) *eop = 1;
- else *eop = 0;
-
- *size = status_size & DMA_BD_BUFL_MASK;
-
-// printf("Status: %lx\n", status_size);
- return info->tail;
- }
-
- usleep(10);
- gettimeofday(&cur, NULL);
- } while ((timeout == PCILIB_TIMEOUT_INFINITE)||(((cur.tv_sec - start.tv_sec)*1000000 + (cur.tv_usec - start.tv_usec)) < timeout));
-
-// printf("Final status: %lx\n", status_size);
-
- return (size_t)-1;
-}
-
-static int dma_nwl_return_buffer(nwl_dma_t *ctx, pcilib_nwl_engine_description_t *info) {
- uint32_t val;
-
- unsigned char *ring = pcilib_kmem_get_ua(ctx->pcilib, info->ring);
- uint32_t ring_pa = pcilib_kmem_get_pa(ctx->pcilib, info->ring);
- size_t bufsz = pcilib_kmem_get_block_size(ctx->pcilib, info->pages, info->tail);
-
- ring += info->tail * PCILIB_NWL_DMA_DESCRIPTOR_SIZE;
-// printf("Returning: %i\n", info->tail);
-
-#ifdef NWL_GENERATE_DMA_IRQ
- NWL_RING_SET(ring, DMA_BD_BUFL_CTRL_OFFSET, bufsz | DMA_BD_INT_ERROR_MASK | DMA_BD_INT_COMP_MASK);
-#else /* NWL_GENERATE_DMA_IRQ */
- NWL_RING_SET(ring, DMA_BD_BUFL_CTRL_OFFSET, bufsz);
-#endif /* NWL_GENERATE_DMA_IRQ */
-
- NWL_RING_SET(ring, DMA_BD_BUFL_STATUS_OFFSET, 0);
-
- val = ring_pa + info->tail * PCILIB_NWL_DMA_DESCRIPTOR_SIZE;
- nwl_write_register(val, ctx, info->base_addr, REG_SW_NEXT_BD);
-// nwl_read_register(val, ctx, info->base_addr, 0x18);
-
- info->tail++;
- if (info->tail == info->ring_size) info->tail = 0;
-}
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