[PATCH 5.4 055/434] drm/amdgpu/sriov: add ring_stop before ring_create in psp v11 code

Greg Kroah-Hartman
2019-12-29T17:43:42Z

From: Jack Zhang <Jack.Zhang1@amd.com>

[ Upstream commit 51c0f58e9f6af3a387d14608033e6796a7ad90ee ]

psp v11 code missed ring stop in ring create function(VMR)
while psp v3.1 code had the code. This will cause VM destroy1
fail and psp ring create fail.

For SIOV-VF, ring_stop should not be deleted in ring_create
function.

Signed-off-by: Jack Zhang <Jack.Zhang1@amd.com>
Reviewed-by: Feifei Xu <Feifei.Xu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/amd/amdgpu/psp_v11_0.c | 61 ++++++++++++++------------
1 file changed, 34 insertions(+), 27 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/psp_v11_0.c b/drivers/gpu/drm/amd/amdgpu/psp_v11_0.c
index 10166104b8a3..d483684db95b 100644
--- a/drivers/gpu/drm/amd/amdgpu/psp_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/psp_v11_0.c
@@ -398,6 +398,34 @@ static bool psp_v11_0_support_vmr_ring(struct psp_context *psp)
return false;
}

+static int psp_v11_0_ring_stop(struct psp_context *psp,
+ enum psp_ring_type ring_type)
+{
+ int ret = 0;
+ struct amdgpu_device *adev = psp->adev;
+
+ /* Write the ring destroy command*/
+ if (psp_v11_0_support_vmr_ring(psp))
+ WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_101,
+ GFX_CTRL_CMD_ID_DESTROY_GPCOM_RING);
+ else
+ WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_64,
+ GFX_CTRL_CMD_ID_DESTROY_RINGS);
+
+ /* there might be handshake issue with hardware which needs delay */
+ mdelay(20);
+
+ /* Wait for response flag (bit 31) */
+ if (psp_v11_0_support_vmr_ring(psp))
+ ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, mmMP0_SMN_C2PMSG_101),
+ 0x80000000, 0x80000000, false);
+ else
+ ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, mmMP0_SMN_C2PMSG_64),
+ 0x80000000, 0x80000000, false);
+
+ return ret;
+}
+
static int psp_v11_0_ring_create(struct psp_context *psp,
enum psp_ring_type ring_type)
{
@@ -407,6 +435,12 @@ static int psp_v11_0_ring_create(struct psp_context *psp,
struct amdgpu_device *adev = psp->adev;

if (psp_v11_0_support_vmr_ring(psp)) {
+ ret = psp_v11_0_ring_stop(psp, ring_type);
+ if (ret) {
+ DRM_ERROR("psp_v11_0_ring_stop_sriov failed!\n");
+ return ret;
+ }
+
/* Write low address of the ring to C2PMSG_102 */
psp_ring_reg = lower_32_bits(ring->ring_mem_mc_addr);
WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_102, psp_ring_reg);
@@ -451,33 +485,6 @@ static int psp_v11_0_ring_create(struct psp_context *psp,
return ret;
}

-static int psp_v11_0_ring_stop(struct psp_context *psp,
- enum psp_ring_type ring_type)
-{
- int ret = 0;
- struct amdgpu_device *adev = psp->adev;
-
- /* Write the ring destroy command*/
- if (psp_v11_0_support_vmr_ring(psp))
- WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_101,
- GFX_CTRL_CMD_ID_DESTROY_GPCOM_RING);
- else
- WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_64,
- GFX_CTRL_CMD_ID_DESTROY_RINGS);
-
- /* there might be handshake issue with hardware which needs delay */
- mdelay(20);
-
- /* Wait for response flag (bit 31) */
- if (psp_v11_0_support_vmr_ring(psp))
- ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, mmMP0_SMN_C2PMSG_101),
- 0x80000000, 0x80000000, false);
- else
- ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, mmMP0_SMN_C2PMSG_64),
- 0x80000000, 0x80000000, false);
-
- return ret;
-}

static int psp_v11_0_ring_destroy(struct psp_context *psp,
enum psp_ring_type ring_type)
--
2.20.1