[PATCH 6.15.y 1/3] drm/amdgpu: Add the new sdma function pointers for amdgpu_sdma.h

[Sasha Levin <sashal@kernel.org>]

From: "Jesse.zhang@amd.com" <Jesse.zhang@amd.com>

[ Upstream commit 29891842154d7ebca97a94b0d5aaae94e560f61c ]

This patch introduces new function pointers in the amdgpu_sdma structure
to handle queue stop, start and soft reset operations. These will replace
the older callback mechanism.

The new functions are:
- stop_kernel_queue: Stops a specific SDMA queue
- start_kernel_queue: Starts/Restores a specific SDMA queue
- soft_reset_kernel_queue: Performs soft reset on a specific SDMA queue

v2: Update stop_queue/start_queue function paramters to use ring pointer instead of device/instance(Chritian)
v3: move stop_queue/start_queue to struct amdgpu_sdma_instance and rename them. (Alex)
v4: rework the ordering a bit (Alex)

Suggested-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Jesse Zhang <Jesse.Zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Stable-dep-of: 09b585592fa4 ("drm/amdgpu: Fix SDMA engine reset with logical instance ID")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
index 47d56fd0589fc..bf83d66462380 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
@@ -50,6 +50,12 @@ enum amdgpu_sdma_irq {
 
 #define NUM_SDMA(x) hweight32(x)
 
+struct amdgpu_sdma_funcs {
+	int (*stop_kernel_queue)(struct amdgpu_ring *ring);
+	int (*start_kernel_queue)(struct amdgpu_ring *ring);
+	int (*soft_reset_kernel_queue)(struct amdgpu_device *adev, u32 instance_id);
+};
+
 struct amdgpu_sdma_instance {
 	/* SDMA firmware */
 	const struct firmware	*fw;
@@ -68,7 +74,7 @@ struct amdgpu_sdma_instance {
 	/* track guilty state of GFX and PAGE queues */
 	bool			gfx_guilty;
 	bool			page_guilty;
-
+	const struct amdgpu_sdma_funcs   *funcs;
 };
 
 enum amdgpu_sdma_ras_memory_id {
-- 
2.39.5