drm/nouveau/gr/gf100-: move fecs discover_image_size into a function

Makes the code somewhat less magic.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.c b/drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.c
index 05cdfb7..6c045f2 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.c
@@ -715,6 +715,22 @@ gf100_gr_pack_mmio[] = {
  * PGRAPH engine/subdev functions
  ******************************************************************************/
 
+static int
+gf100_gr_fecs_discover_image_size(struct gf100_gr *gr, u32 *psize)
+{
+       struct nvkm_device *device = gr->base.engine.subdev.device;
+
+       nvkm_wr32(device, 0x409840, 0xffffffff);
+       nvkm_wr32(device, 0x409500, 0x00000000);
+       nvkm_wr32(device, 0x409504, 0x00000010);
+       nvkm_msec(device, 2000,
+               if ((*psize = nvkm_rd32(device, 0x409800)))
+                       return 0;
+       );
+
+       return -ETIMEDOUT;
+}
+
 static void
 gf100_gr_fecs_set_watchdog_timeout(struct gf100_gr *gr, u32 timeout)
 {
@@ -1497,6 +1513,7 @@ gf100_gr_init_ctxctl_ext(struct gf100_gr *gr)
        struct nvkm_device *device = subdev->device;
        struct nvkm_secboot *sb = device->secboot;
        u32 secboot_mask = 0;
+       int ret;
 
        /* load fuc microcode */
        nvkm_mc_unk260(device, 0);
@@ -1536,14 +1553,10 @@ gf100_gr_init_ctxctl_ext(struct gf100_gr *gr)
 
        gf100_gr_fecs_set_watchdog_timeout(gr, 0x7fffffff);
 
-       nvkm_wr32(device, 0x409840, 0xffffffff);
-       nvkm_wr32(device, 0x409500, 0x00000000);
-       nvkm_wr32(device, 0x409504, 0x00000010);
-       if (nvkm_msec(device, 2000,
-               if ((gr->size = nvkm_rd32(device, 0x409800)))
-                       break;
-       ) < 0)
-               return -EBUSY;
+       /* Determine how much memory is required to store main context image. */
+       ret = gf100_gr_fecs_discover_image_size(gr, &gr->size);
+       if (ret)
+               return ret;
 
        nvkm_wr32(device, 0x409840, 0xffffffff);
        nvkm_wr32(device, 0x409500, 0x00000000);