summaryrefslogtreecommitdiffstats
path: root/dma/nwl.c
diff options
context:
space:
mode:
Diffstat (limited to 'dma/nwl.c')
-rw-r--r--dma/nwl.c279
1 files changed, 0 insertions, 279 deletions
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 <sys/time.h>
#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;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 12:56:30 +0000