gpu: nvgpu: vgpu: perfbuffer support

Add vgpu support for ModeE perfbuffers

- VM allocation is handled by the kernel, with final mapping
  handled by the RM server
- Enabling/disabling the perfbuffer is handled by the RM server

Bug 1880196
JIRA EVLR-1074

Change-Id: Ifbeb5ede6b07e2e112b930c602c22b66a58ac920
Signed-off-by: Peter Daifuku <pdaifuku@nvidia.com>
Reviewed-on: https://git-master/r/1506747
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/vgpu/dbg_vgpu.c b/drivers/gpu/nvgpu/vgpu/dbg_vgpu.c
index b9cbcead..72faf76c 100644
--- a/drivers/gpu/nvgpu/vgpu/dbg_vgpu.c
+++ b/drivers/gpu/nvgpu/vgpu/dbg_vgpu.c
@@ -178,6 +178,37 @@ static void vgpu_release_profiler_reservation(
                 vgpu_sendrecv_prof_cmd(dbg_s, TEGRA_VGPU_PROF_RELEASE);
 }
 
+static int vgpu_sendrecv_perfbuf_cmd(struct gk20a *g, u64 offset, u32 size)
+{
+        struct mm_gk20a *mm = &g->mm;
+        struct vm_gk20a *vm = mm->perfbuf.vm;
+        struct tegra_vgpu_cmd_msg msg;
+        struct tegra_vgpu_perfbuf_mgt_params *p =
+                                                &msg.params.perfbuf_management;
+        int err;
+
+        msg.cmd = TEGRA_VGPU_CMD_PERFBUF_MGT;
+        msg.handle = vgpu_get_handle(g);
+
+        p->vm_handle = vm->handle;
+        p->offset = offset;
+        p->size = size;
+
+        err = vgpu_comm_sendrecv(&msg, sizeof(msg), sizeof(msg));
+        err = err ? err : msg.ret;
+        return err;
+}
+
+static int vgpu_perfbuffer_enable(struct gk20a *g, u64 offset, u32 size)
+{
+        return vgpu_sendrecv_perfbuf_cmd(g, offset, size);
+}
+
+static int vgpu_perfbuffer_disable(struct gk20a *g)
+{
+        return vgpu_sendrecv_perfbuf_cmd(g, 0, 0);
+}
+
 void vgpu_init_dbg_session_ops(struct gpu_ops *gops)
 {
         gops->dbg_session_ops.exec_reg_ops = vgpu_exec_regops;
@@ -188,4 +219,6 @@ void vgpu_init_dbg_session_ops(struct gpu_ops *gops)
                                         vgpu_check_and_set_context_reservation;
         gops->dbg_session_ops.release_profiler_reservation =
                                         vgpu_release_profiler_reservation;
+        gops->dbg_session_ops.perfbuffer_enable = vgpu_perfbuffer_enable;
+        gops->dbg_session_ops.perfbuffer_disable = vgpu_perfbuffer_disable;
 }