/* Switch to next buffer, optionally wait for it to be available */
static int switch_next_buffer(struct etna_ctx *ctx)
{
int next_buf_id = (ctx->cur_buf + 1) % NUM_COMMAND_BUFFERS;
#if 0
fprintf(stderr, "Switching to new buffer %i\n", next_buf_id);
#endif
if(viv_user_signal_wait(ctx->conn, ctx->cmdbufi[next_buf_id].sig_id, VIV_WAIT_INDEFINITE) != 0)
{
#ifdef DEBUG
fprintf(stderr, "Error waiting for command buffer sync signal\n");
#endif
return ETNA_INTERNAL_ERROR;
}
clear_buffer(ctx->cmdbuf[next_buf_id]);
ctx->cur_buf = next_buf_id;
ctx->buf = VIV_TO_PTR(ctx->cmdbuf[next_buf_id]->logical);
ctx->offset = ctx->cmdbuf[next_buf_id]->offset / 4;
#ifdef DEBUG
fprintf(stderr, "Switched to command buffer %i\n", ctx->cur_buf);
#endif
return ETNA_OK;
}
/** Finish building context buffer.
* final_pipe is the current pipe at the end of the context buffer.
*/
static int gpu_context_build_end(struct etna_ctx *ctx, enum etna_pipe final_pipe)
{
if(ctx->cur_buf != ETNA_CTX_BUFFER)
return ETNA_INTERNAL_ERROR;
/* If closing pipe of context is different from entry pipe, add a switch
* command, as we want the context to end in the entry pipe. The kernel
* will handle switching to the entry pipe only when this is a new context.
*/
if(final_pipe != GCCTX(ctx)->entryPipe)
{
etna_set_pipe(ctx, GCCTX(ctx)->entryPipe);
}
/* Set current size -- finishing up context before flush
* will add space for a LINK command and inUse flag.
*/
GCCTX(ctx)->bufferSize = ctx->offset * 4;
/* Switch back to stored buffer */
ctx->cur_buf = ctx->stored_buf;
ctx->buf = VIV_TO_PTR(ctx->cmdbuf[ctx->cur_buf]->logical);
ctx->offset = ctx->cmdbuf[ctx->cur_buf]->offset / 4;
return ETNA_OK;
}
int etna_free(struct etna_ctx *ctx)
{
if(ctx == NULL)
return ETNA_INVALID_ADDR;
/* Free kernel command queue */
etna_queue_free(ctx->queue);
#ifdef GCABI_HAVE_CONTEXT
/* Free context buffer */
gpu_context_free_buffer(ctx, &ctx->ctx_info, false);
#endif
/* Free command buffers */
for(int x=0; x<NUM_COMMAND_BUFFERS; ++x)
{
viv_free_contiguous(ctx->conn, ctx->cmdbufi[x].bytes, (viv_addr_t)ctx->cmdbufi[x].physical, VIV_TO_PTR(ctx->cmdbufi[x].logical));
ETNA_FREE(ctx->cmdbuf[x]);
}
ETNA_FREE(ctx);
return ETNA_OK;
}
