From: Alex Deucher <alexander.deucher@xxxxxxx>
v2: add documenation
v3: update the latest ib changes
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
---
drivers/gpu/drm/radeon/cik.c | 114 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 114 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c
index 0b9c3c9..0cf04f3 100644
--- a/drivers/gpu/drm/radeon/cik.c
+++ b/drivers/gpu/drm/radeon/cik.c
@@ -1518,6 +1518,57 @@ static void cik_scratch_init(struct radeon_device *rdev)
}
/**
+ * cik_ring_test - basic gfx ring test
+ *
+ * @rdev: radeon_device pointer
+ * @ring: radeon_ring structure holding ring information
+ *
+ * Allocate a scratch register and write to it using the gfx ring (CIK).
+ * Provides a basic gfx ring test to verify that the ring is working.
+ * Used by cik_cp_gfx_resume();
+ * Returns 0 on success, error on failure.
+ */
+int cik_ring_test(struct radeon_device *rdev, struct radeon_ring *ring)
+{
+ uint32_t scratch;
+ uint32_t tmp = 0;
+ unsigned i;
+ int r;
+
+ r = radeon_scratch_get(rdev, &scratch);
+ if (r) {
+ DRM_ERROR("radeon: cp failed to get scratch reg (%d).\n", r);
+ return r;
+ }
+ WREG32(scratch, 0xCAFEDEAD);
+ r = radeon_ring_lock(rdev, ring, 3);
+ if (r) {
+ DRM_ERROR("radeon: cp failed to lock ring %d (%d).\n", ring->idx, r);
+ radeon_scratch_free(rdev, scratch);
+ return r;
+ }
+ radeon_ring_write(ring, PACKET3(PACKET3_SET_UCONFIG_REG, 1));
+ radeon_ring_write(ring, ((scratch - PACKET3_SET_UCONFIG_REG_START) >> 2));
+ radeon_ring_write(ring, 0xDEADBEEF);
+ radeon_ring_unlock_commit(rdev, ring);
+ for (i = 0; i < rdev->usec_timeout; i++) {
+ tmp = RREG32(scratch);
+ if (tmp == 0xDEADBEEF)
+ break;
+ DRM_UDELAY(1);
+ }
+ if (i < rdev->usec_timeout) {
+ DRM_INFO("ring test on %d succeeded in %d usecs\n", ring->idx, i);
+ } else {
+ DRM_ERROR("radeon: ring %d test failed (scratch(0x%04X)=0x%08X)\n",
+ ring->idx, scratch, tmp);
+ r = -EINVAL;
+ }
+ radeon_scratch_free(rdev, scratch);
+ return r;
+}
+
+/**
* cik_fence_ring_emit - emit a fence on the gfx ring
*
* @rdev: radeon_device pointer
@@ -1626,6 +1677,69 @@ void cik_ring_ib_execute(struct radeon_device *rdev, struct radeon_ib *ib)
radeon_ring_write(ring, control);
}
+/**
+ * cik_ib_test - basic gfx ring IB test
+ *
+ * @rdev: radeon_device pointer
+ * @ring: radeon_ring structure holding ring information
+ *
+ * Allocate an IB and execute it on the gfx ring (CIK).
+ * Provides a basic gfx ring test to verify that IBs are working.
+ * Returns 0 on success, error on failure.
+ */
+int cik_ib_test(struct radeon_device *rdev, struct radeon_ring *ring)
+{
+ struct radeon_ib ib;
+ uint32_t scratch;
+ uint32_t tmp = 0;
+ unsigned i;
+ int r;
+
+ r = radeon_scratch_get(rdev, &scratch);
+ if (r) {
+ DRM_ERROR("radeon: failed to get scratch reg (%d).\n", r);
+ return r;
+ }
+ WREG32(scratch, 0xCAFEDEAD);
+ r = radeon_ib_get(rdev, ring->idx, &ib, NULL, 256);
+ if (r) {
+ DRM_ERROR("radeon: failed to get ib (%d).\n", r);
+ return r;
+ }
+ ib.ptr[0] = PACKET3(PACKET3_SET_UCONFIG_REG, 1);
+ ib.ptr[1] = ((scratch - PACKET3_SET_UCONFIG_REG_START) >> 2);
+ ib.ptr[2] = 0xDEADBEEF;
+ ib.length_dw = 3;
+ r = radeon_ib_schedule(rdev, &ib, NULL);
+ if (r) {
+ radeon_scratch_free(rdev, scratch);
+ radeon_ib_free(rdev, &ib);
+ DRM_ERROR("radeon: failed to schedule ib (%d).\n", r);
+ return r;
+ }
+ r = radeon_fence_wait(ib.fence, false);
+ if (r) {
+ DRM_ERROR("radeon: fence wait failed (%d).\n", r);
+ return r;
+ }
+ for (i = 0; i < rdev->usec_timeout; i++) {
+ tmp = RREG32(scratch);
+ if (tmp == 0xDEADBEEF)
+ break;
+ DRM_UDELAY(1);
+ }
+ if (i < rdev->usec_timeout) {
+ DRM_INFO("ib test on ring %d succeeded in %u usecs\n", ib.fence->ring, i);
+ } else {
+ DRM_ERROR("radeon: ib test failed (scratch(0x%04X)=0x%08X)\n",
+ scratch, tmp);
+ r = -EINVAL;
+ }
+ radeon_scratch_free(rdev, scratch);
+ radeon_ib_free(rdev, &ib);
+ return r;
+}
+
/*
* CP.
* On CIK, gfx and compute now have independant command processors.
--
1.7.7.5
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