[PATCH] spufs: implement mfc access for PPE-side DMA

[powerpc.git] / arch / powerpc / platforms / cell / spufs / backing_ops.c

diff --git a/arch/powerpc/platforms/cell/spufs/backing_ops.c b/arch/powerpc/platforms/cell/spufs/backing_ops.c
index a5c489a..f1d35dd 100644 (file)
--- a/arch/powerpc/platforms/cell/spufs/backing_ops.c
+++ b/arch/powerpc/platforms/cell/spufs/backing_ops.c
@@ -285,6 +285,49 @@ static void spu_backing_runcntl_stop(struct spu_context *ctx)
        spu_backing_runcntl_write(ctx, SPU_RUNCNTL_STOP);
 }
 
+static int spu_backing_set_mfc_query(struct spu_context * ctx, u32 mask,
+                                       u32 mode)
+{
+       struct spu_problem_collapsed *prob = &ctx->csa.prob;
+       int ret;
+
+       spin_lock(&ctx->csa.register_lock);
+       ret = -EAGAIN;
+       if (prob->dma_querytype_RW)
+               goto out;
+       ret = 0;
+       /* FIXME: what are the side-effects of this? */
+       prob->dma_querymask_RW = mask;
+       prob->dma_querytype_RW = mode;
+out:
+       spin_unlock(&ctx->csa.register_lock);
+
+       return ret;
+}
+
+static u32 spu_backing_read_mfc_tagstatus(struct spu_context * ctx)
+{
+       return ctx->csa.prob.dma_tagstatus_R;
+}
+
+static u32 spu_backing_get_mfc_free_elements(struct spu_context *ctx)
+{
+       return ctx->csa.prob.dma_qstatus_R;
+}
+
+static int spu_backing_send_mfc_command(struct spu_context *ctx,
+                                       struct mfc_dma_command *cmd)
+{
+       int ret;
+
+       spin_lock(&ctx->csa.register_lock);
+       ret = -EAGAIN;
+       /* FIXME: set up priv2->puq */
+       spin_unlock(&ctx->csa.register_lock);
+
+       return ret;
+}
+
 struct spu_context_ops spu_backing_ops = {
        .mbox_read = spu_backing_mbox_read,
        .mbox_stat_read = spu_backing_mbox_stat_read,
@@ -305,4 +348,8 @@ struct spu_context_ops spu_backing_ops = {
        .get_ls = spu_backing_get_ls,
        .runcntl_write = spu_backing_runcntl_write,
        .runcntl_stop = spu_backing_runcntl_stop,
+       .set_mfc_query = spu_backing_set_mfc_query,
+       .read_mfc_tagstatus = spu_backing_read_mfc_tagstatus,
+       .get_mfc_free_elements = spu_backing_get_mfc_free_elements,
+       .send_mfc_command = spu_backing_send_mfc_command,
 };