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#define _PCILIB_DMA_NWL_C
#define _BSD_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/time.h>
#include "pci.h"
#include "pcilib.h"
#include "error.h"
#include "tools.h"
#include "nwl.h"
#include "nwl_defines.h"
int dma_nwl_start(pcilib_dma_context_t *vctx, pcilib_dma_engine_t dma, pcilib_dma_flags_t flags) {
nwl_dma_t *ctx = (nwl_dma_t*)vctx;
if (!ctx->started) {
// global initialization, should we do anything?
ctx->started = 1;
}
if (dma == PCILIB_DMA_ENGINE_INVALID) return 0;
else if (dma > ctx->n_engines) return PCILIB_ERROR_INVALID_BANK;
if (flags&PCILIB_DMA_FLAG_PERSISTENT) ctx->engines[dma].preserve = 1;
return dma_nwl_start_engine(ctx, dma);
}
int dma_nwl_stop(pcilib_dma_context_t *vctx, pcilib_dma_engine_t dma, pcilib_dma_flags_t flags) {
int err;
int preserving = 0;
nwl_dma_t *ctx = (nwl_dma_t*)vctx;
if (!ctx->started) return 0;
// stop everything
if (dma == PCILIB_DMA_ENGINE_INVALID) {
for (dma = 0; dma < ctx->n_engines; dma++) {
if (flags&PCILIB_DMA_FLAG_PERMANENT) {
ctx->engines[dma].preserve = 0;
}
if (ctx->engines[dma].preserve) preserving = 1;
err = dma_nwl_stop_engine(ctx, dma);
if (err) return err;
}
// global cleanup, should we do anything?
if (!preserving) {
ctx->started = 0;
}
return 0;
}
if (dma > ctx->n_engines) return PCILIB_ERROR_INVALID_BANK;
// ignorign previous setting if flag specified
if (flags&PCILIB_DMA_FLAG_PERMANENT) {
ctx->engines[dma].preserve = 0;
}
return dma_nwl_stop_engine(ctx, dma);
}
pcilib_dma_context_t *dma_nwl_init(pcilib_t *pcilib, pcilib_dma_modification_t type, void *arg) {
int i;
int err;
uint32_t val;
pcilib_dma_engine_t n_engines;
pcilib_model_description_t *model_info = pcilib_get_model_description(pcilib);
nwl_dma_t *ctx = malloc(sizeof(nwl_dma_t));
if (ctx) {
memset(ctx, 0, sizeof(nwl_dma_t));
ctx->pcilib = pcilib;
ctx->type = type;
pcilib_register_bank_t dma_bank = pcilib_find_bank_by_addr(pcilib, PCILIB_REGISTER_BANK_DMA);
if (dma_bank == PCILIB_REGISTER_BANK_INVALID) {
free(ctx);
pcilib_error("DMA Register Bank could not be found");
return NULL;
}
ctx->dma_bank = model_info->banks + dma_bank;
ctx->base_addr = pcilib_resolve_register_address(pcilib, ctx->dma_bank->bar, ctx->dma_bank->read_addr);
for (i = 0, n_engines = 0; i < 2 * PCILIB_MAX_DMA_ENGINES; i++) {
char *addr = ctx->base_addr + DMA_OFFSET + i * DMA_ENGINE_PER_SIZE;
memset(ctx->engines + n_engines, 0, sizeof(pcilib_nwl_engine_description_t));
err = dma_nwl_read_engine_config(ctx, ctx->engines + n_engines, addr);
if (err) continue;
pcilib_set_dma_engine_description(pcilib, n_engines, (pcilib_dma_engine_description_t*)(ctx->engines + n_engines));
++n_engines;
}
pcilib_set_dma_engine_description(pcilib, n_engines, NULL);
ctx->n_engines = n_engines;
err = nwl_add_registers(ctx);
if (err) {
free(ctx);
pcilib_error("Failed to add DMA registers");
return NULL;
}
}
return (pcilib_dma_context_t*)ctx;
}
void dma_nwl_free(pcilib_dma_context_t *vctx) {
int err;
pcilib_dma_engine_t i;
nwl_dma_t *ctx = (nwl_dma_t*)vctx;
if (ctx) {
if (ctx->type == PCILIB_DMA_MODIFICATION_DEFAULT) dma_nwl_stop_loopback(ctx);
dma_nwl_free_irq(ctx);
dma_nwl_stop(ctx, PCILIB_DMA_ENGINE_ALL, PCILIB_DMA_FLAGS_DEFAULT);
free(ctx);
}
}
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