drm/amdgpu: Implement a new 64bit sequence memory driver

Developed a new driver which allocates a 64bit memory on
each request in sequence order. At the moment, user queue
fence memory is the main consumer of this seq64 driver.

v2: Worked on review comments from Christian for the following
    modifications

    - Move driver name from "semaphore" to "seq64"
    - Remove unnecessary PT/PD mapping
    - Move enable_mes check into init/fini functions.

v3: Worked on review comments from Christian

    - drop enable_mes check
    - use DECLARE_BITMAP for bit array
    - added kerneldoc for seq64

v4: Worked on review comments from Christian
    - Rename amdgpu_seq64_get name with amdgpu_seq64_alloc

v5: Worked on review comments from Christian
    - Fix seq64 lockdep warning
    - move fpriv->seq64_va check into amdgpu_seq64_unmap()
    - make the function amdgpu_seq64_unmap() return as void.
    - reserve the buffers as not interruptible.

v6: port to drm_exec (Alex)
v7: disable for now (Arun)

Signed-off-by: Arunpravin Paneer Selvam <[email protected]>
Reviewed-by: Christian König <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 9d92ca157677..4d100f8d75bf 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -109,6 +109,7 @@
 #include "amdgpu_mca.h"
 #include "amdgpu_ras.h"
 #include "amdgpu_xcp.h"
+#include "amdgpu_seq64.h"
 
 #define MAX_GPU_INSTANCE		64
 
@@ -468,6 +469,7 @@ struct amdgpu_fpriv {
 	struct amdgpu_vm	vm;
 	struct amdgpu_bo_va	*prt_va;
 	struct amdgpu_bo_va	*csa_va;
+	struct amdgpu_bo_va	*seq64_va;
 	struct mutex		bo_list_lock;
 	struct idr		bo_list_handles;
 	struct amdgpu_ctx_mgr	ctx_mgr;
@@ -986,6 +988,9 @@ struct amdgpu_device {
 	/* GDS */
 	struct amdgpu_gds		gds;
 
+	/* for userq and VM fences */
+	struct amdgpu_seq64		seq64;
+
 	/* KFD */
 	struct amdgpu_kfd_dev		kfd;