gpu: nvgpu: add hw perfmon buffer mapping ioctls

Map/unmap buffers for HWPM and deal with its instance block, the minimum
work required to run the HWPM via regops from userspace.

Bug 1517458
Bug 1573150

Change-Id: If14086a88b54bf434843d7c2fee8a9113023a3b0
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: http://git-master/r/673689
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 18 insertions, 2 deletions

diff --git a/include/uapi/linux/nvgpu.h b/include/uapi/linux/nvgpu.h
index 1e438775..ebeacf9b 100644
--- a/include/uapi/linux/nvgpu.h
+++ b/include/uapi/linux/nvgpu.h
@@ -432,10 +432,26 @@ struct nvgpu_dbg_gpu_suspend_resume_all_sms_args {
 #define NVGPU_DBG_GPU_IOCTL_SUSPEND_RESUME_ALL_SMS                      \
         _IOWR(NVGPU_DBG_GPU_IOCTL_MAGIC, 6, struct nvgpu_dbg_gpu_suspend_resume_all_sms_args)
 
+struct nvgpu_dbg_gpu_perfbuf_map_args {
+        __u32 dmabuf_fd;        /* in */
+        __u32 reserved;
+        __u64 mapping_size;     /* in, size of mapped buffer region */
+        __u64 offset;           /* out, virtual address of the mapping */
+};
+
+struct nvgpu_dbg_gpu_perfbuf_unmap_args {
+        __u64 offset;
+};
+
+#define NVGPU_DBG_GPU_IOCTL_PERFBUF_MAP \
+        _IOWR(NVGPU_DBG_GPU_IOCTL_MAGIC, 7, struct nvgpu_dbg_gpu_perfbuf_map_args)
+#define NVGPU_DBG_GPU_IOCTL_PERFBUF_UNMAP \
+        _IOWR(NVGPU_DBG_GPU_IOCTL_MAGIC, 8, struct nvgpu_dbg_gpu_perfbuf_unmap_args)
+
 #define NVGPU_DBG_GPU_IOCTL_LAST                \
-        _IOC_NR(NVGPU_DBG_GPU_IOCTL_SUSPEND_RESUME_ALL_SMS)
+        _IOC_NR(NVGPU_DBG_GPU_IOCTL_PERFBUF_UNMAP)
 #define NVGPU_DBG_GPU_IOCTL_MAX_ARG_SIZE                \
-        sizeof(struct nvgpu_dbg_gpu_exec_reg_ops_args)
+        sizeof(struct nvgpu_dbg_gpu_perfbuf_map_args)
 
 /*
  * /dev/nvhost-gpu device