From 6c922712fd8ee7e75a1b45c4980be22d36d0d1d9 Mon Sep 17 00:00:00 2001 From: "Suren A. Chilingaryan" Date: Tue, 12 Jul 2011 14:51:11 +0200 Subject: Another reorganization of NWL sources --- dma/nwl.c | 279 -------------------------------------------------------------- 1 file changed, 279 deletions(-) (limited to 'dma/nwl.c') diff --git a/dma/nwl.c b/dma/nwl.c index bca0c5c..ea31e01 100644 --- a/dma/nwl.c +++ b/dma/nwl.c @@ -8,199 +8,14 @@ #include #include "pci.h" -#include "dma.h" #include "pcilib.h" #include "error.h" #include "tools.h" #include "nwl.h" #include "nwl_defines.h" -#include "nwl_register.h" -#define NWL_XAUI_ENGINE 0 -#define NWL_XRAWDATA_ENGINE 1 -#define NWL_FIX_EOP_FOR_BIG_PACKETS // requires precise sizes in read requests -//#define NWL_GENERATE_DMA_IRQ - -#define PCILIB_NWL_ALIGNMENT 64 // in bytes -#define PCILIB_NWL_DMA_DESCRIPTOR_SIZE 64 // in bytes -#define PCILIB_NWL_DMA_PAGES 512 // 1024 - - -static int dma_nwl_read_engine_config(nwl_dma_t *ctx, pcilib_nwl_engine_description_t *info, char *base) { - uint32_t val; - - info->base_addr = base; - - nwl_read_register(val, ctx, base, REG_DMA_ENG_CAP); - - if ((val & DMA_ENG_PRESENT_MASK) == 0) return PCILIB_ERROR_NOTAVAILABLE; - - info->desc.addr = (val & DMA_ENG_NUMBER) >> DMA_ENG_NUMBER_SHIFT; - if ((info->desc.addr > PCILIB_MAX_DMA_ENGINES)||(info->desc.addr < 0)) return PCILIB_ERROR_INVALID_DATA; - - switch (val & DMA_ENG_DIRECTION_MASK) { - case DMA_ENG_C2S: - info->desc.direction = PCILIB_DMA_FROM_DEVICE; - break; - default: - info->desc.direction = PCILIB_DMA_TO_DEVICE; - } - - switch (val & DMA_ENG_TYPE_MASK) { - case DMA_ENG_BLOCK: - info->desc.type = PCILIB_DMA_TYPE_BLOCK; - break; - case DMA_ENG_PACKET: - info->desc.type = PCILIB_DMA_TYPE_PACKET; - break; - default: - info->desc.type = PCILIB_DMA_TYPE_UNKNOWN; - } - - info->desc.addr_bits = (val & DMA_ENG_BD_MAX_BC) >> DMA_ENG_BD_MAX_BC_SHIFT; - - info->base_addr = base; - - return 0; -} - - -int dma_nwl_start_engine(nwl_dma_t *ctx, pcilib_dma_engine_t dma) { - int err; - uint32_t val; - uint32_t ring_pa; - struct timeval start, cur; - - pcilib_nwl_engine_description_t *info = ctx->engines + dma; - char *base = ctx->engines[dma].base_addr; - - if (info->started) return 0; - - // Disable IRQs - err = dma_nwl_disable_engine_irq(ctx, dma); - if (err) return err; - - // Disable Engine & Reseting - val = DMA_ENG_DISABLE|DMA_ENG_USER_RESET; - nwl_write_register(val, ctx, base, REG_DMA_ENG_CTRL_STATUS); - - gettimeofday(&start, NULL); - do { - nwl_read_register(val, ctx, base, REG_DMA_ENG_CTRL_STATUS); - gettimeofday(&cur, NULL); - } while ((val & (DMA_ENG_STATE_MASK|DMA_ENG_USER_RESET))&&(((cur.tv_sec - start.tv_sec)*1000000 + (cur.tv_usec - start.tv_usec)) < PCILIB_REGISTER_TIMEOUT)); - - if (val & (DMA_ENG_STATE_MASK|DMA_ENG_USER_RESET)) { - pcilib_error("Timeout during reset of DMA engine %i", info->desc.addr); - return PCILIB_ERROR_TIMEOUT; - } - - val = DMA_ENG_RESET; - nwl_write_register(val, ctx, base, REG_DMA_ENG_CTRL_STATUS); - - gettimeofday(&start, NULL); - do { - nwl_read_register(val, ctx, base, REG_DMA_ENG_CTRL_STATUS); - gettimeofday(&cur, NULL); - } while ((val & DMA_ENG_RESET)&&(((cur.tv_sec - start.tv_sec)*1000000 + (cur.tv_usec - start.tv_usec)) < PCILIB_REGISTER_TIMEOUT)); - - if (val & DMA_ENG_RESET) { - pcilib_error("Timeout during reset of DMA engine %i", info->desc.addr); - return PCILIB_ERROR_TIMEOUT; - } - - // Acknowledge asserted engine interrupts - if (val & DMA_ENG_INT_ACTIVE_MASK) { - val |= DMA_ENG_ALLINT_MASK; - nwl_write_register(val, ctx, base, REG_DMA_ENG_CTRL_STATUS); - } - - err = dma_nwl_start(ctx); - if (err) return err; - - err = dma_nwl_allocate_engine_buffers(ctx, info); - if (err) return err; - - ring_pa = pcilib_kmem_get_pa(ctx->pcilib, info->ring); - nwl_write_register(ring_pa, ctx, info->base_addr, REG_DMA_ENG_NEXT_BD); - nwl_write_register(ring_pa, ctx, info->base_addr, REG_SW_NEXT_BD); - - __sync_synchronize(); - - nwl_read_register(val, ctx, info->base_addr, REG_DMA_ENG_CTRL_STATUS); - val |= (DMA_ENG_ENABLE); - nwl_write_register(val, ctx, info->base_addr, REG_DMA_ENG_CTRL_STATUS); - - __sync_synchronize(); - -#ifdef NWL_GENERATE_DMA_IRQ - dma_nwl_enable_engine_irq(ctx, dma); -#endif /* NWL_GENERATE_DMA_IRQ */ - - if (info->desc.direction == PCILIB_DMA_FROM_DEVICE) { - ring_pa += (info->ring_size - 1) * PCILIB_NWL_DMA_DESCRIPTOR_SIZE; - nwl_write_register(ring_pa, ctx, info->base_addr, REG_SW_NEXT_BD); - - info->tail = 0; - info->head = (info->ring_size - 1); - } else { - info->tail = 0; - info->head = 0; - } - - info->started = 1; - - return 0; -} - - -int dma_nwl_stop_engine(nwl_dma_t *ctx, pcilib_dma_engine_t dma) { - int err; - uint32_t val; - uint32_t ring_pa; - struct timeval start, cur; - - pcilib_nwl_engine_description_t *info = ctx->engines + dma; - char *base = ctx->engines[dma].base_addr; - - info->started = 0; - - err = dma_nwl_disable_engine_irq(ctx, dma); - if (err) return err; - - val = DMA_ENG_DISABLE; - nwl_write_register(val, ctx, base, REG_DMA_ENG_CTRL_STATUS); - - if (info->ring) { - ring_pa = pcilib_kmem_get_pa(ctx->pcilib, info->ring); - nwl_write_register(ring_pa, ctx, info->base_addr, REG_DMA_ENG_NEXT_BD); - nwl_write_register(ring_pa, ctx, info->base_addr, REG_SW_NEXT_BD); - } - - // Acknowledge asserted engine interrupts - if (val & DMA_ENG_INT_ACTIVE_MASK) { - val |= DMA_ENG_ALLINT_MASK; - nwl_write_register(val, ctx, base, REG_DMA_ENG_CTRL_STATUS); - } - - // Clean buffers - if (info->ring) { - pcilib_free_kernel_memory(ctx->pcilib, info->ring); - info->ring = NULL; - } - - if (info->pages) { - pcilib_free_kernel_memory(ctx->pcilib, info->pages); - info->pages = NULL; - } - - - - return 0; -} - int dma_nwl_start_loopback(nwl_dma_t *ctx, pcilib_dma_direction_t direction, size_t packet_size) { uint32_t val; @@ -328,100 +143,6 @@ void dma_nwl_free(pcilib_dma_context_t *vctx) { } } -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; -} - -#include "nwl_buffers.h" - -int dma_nwl_write_fragment(pcilib_dma_context_t *vctx, pcilib_dma_engine_t dma, uintptr_t addr, size_t size, pcilib_dma_flags_t flags, pcilib_timeout_t timeout, void *data, size_t *written) { - int err; - size_t pos; - size_t bufnum; - nwl_dma_t *ctx = (nwl_dma_t*)vctx; - - pcilib_nwl_engine_description_t *info = ctx->engines + dma; - - err = dma_nwl_start_engine(ctx, dma); - if (err) return err; - - if (data) { - for (pos = 0; pos < size; pos += info->page_size) { - int block_size = min2(size - pos, info->page_size); - - bufnum = dma_nwl_get_next_buffer(ctx, info, 1, timeout); - if (bufnum == PCILIB_DMA_BUFFER_INVALID) { - if (written) *written = pos; - return PCILIB_ERROR_TIMEOUT; - } - - void *buf = pcilib_kmem_get_block_ua(ctx->pcilib, info->pages, bufnum); - memcpy(buf, data, block_size); - - err = dma_nwl_push_buffer(ctx, info, block_size, (flags&PCILIB_DMA_FLAG_EOP)&&((pos + block_size) == size), timeout); - if (err) { - if (written) *written = pos; - return err; - } - } - } - - if (written) *written = size; - - if (flags&PCILIB_DMA_FLAG_WAIT) { - bufnum = dma_nwl_get_next_buffer(ctx, info, PCILIB_NWL_DMA_PAGES - 1, timeout); - if (bufnum == PCILIB_DMA_BUFFER_INVALID) return PCILIB_ERROR_TIMEOUT; - } - - return 0; -} - -int dma_nwl_stream_read(pcilib_dma_context_t *vctx, pcilib_dma_engine_t dma, uintptr_t addr, size_t size, pcilib_dma_flags_t flags, pcilib_timeout_t timeout, pcilib_dma_callback_t cb, void *cbattr) { - int err, ret; - size_t res = 0; - size_t bufnum; - size_t bufsize; - nwl_dma_t *ctx = (nwl_dma_t*)vctx; - - size_t buf_size; - int eop; - - pcilib_nwl_engine_description_t *info = ctx->engines + dma; - - err = dma_nwl_start_engine(ctx, dma); - if (err) return err; - - do { - bufnum = dma_nwl_wait_buffer(ctx, info, &bufsize, &eop, timeout); - if (bufnum == PCILIB_DMA_BUFFER_INVALID) return PCILIB_ERROR_TIMEOUT; - -#ifdef NWL_FIX_EOP_FOR_BIG_PACKETS - if (size > 65536) { -// printf("%i %i\n", res + bufsize, size); - if ((res+bufsize) < size) eop = 0; - else if ((res+bufsize) == size) eop = 1; - } -#endif /* NWL_FIX_EOP_FOR_BIG_PACKETS */ - - //sync - void *buf = pcilib_kmem_get_block_ua(ctx->pcilib, info->pages, bufnum); - ret = cb(cbattr, eop?PCILIB_DMA_FLAG_EOP:0, bufsize, buf); - dma_nwl_return_buffer(ctx, info); - - res += bufsize; - - } while (ret); - - return 0; -} - double dma_nwl_benchmark(pcilib_dma_context_t *vctx, pcilib_dma_engine_addr_t dma, uintptr_t addr, size_t size, size_t iterations, pcilib_dma_direction_t direction) { int i; -- cgit v1.2.3