drm/amdgpu: add gfx11 hw debug mode enable and disable calls

Implement the per-device calls to enable or disable HW debug mode
for GFX11.

Signed-off-by: Jonathan Kim <jonathan.kim@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v11.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v11.c
index 7deff8a..cc954cf 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v11.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v11.c
@@ -607,6 +607,42 @@ static void set_vm_context_page_table_base_v11(struct amdgpu_device *adev,
        adev->gfxhub.funcs->setup_vm_pt_regs(adev, vmid, page_table_base);
 }
 
+/*
+ * Returns TRAP_EN, EXCP_EN and EXCP_REPLACE.
+ *
+ * restore_dbg_registers is ignored here but is a general interface requirement
+ * for devices that support GFXOFF and where the RLC save/restore list
+ * does not support hw registers for debugging i.e. the driver has to manually
+ * initialize the debug mode registers after it has disabled GFX off during the
+ * debug session.
+ */
+static uint32_t kgd_gfx_v11_enable_debug_trap(struct amdgpu_device *adev,
+                                           bool restore_dbg_registers,
+                                           uint32_t vmid)
+{
+       uint32_t data = 0;
+
+       data = REG_SET_FIELD(data, SPI_GDBG_PER_VMID_CNTL, TRAP_EN, 1);
+       data = REG_SET_FIELD(data, SPI_GDBG_PER_VMID_CNTL, EXCP_EN, 0);
+       data = REG_SET_FIELD(data, SPI_GDBG_PER_VMID_CNTL, EXCP_REPLACE, 0);
+
+       return data;
+}
+
+/* Returns TRAP_EN, EXCP_EN and EXCP_REPLACE. */
+static uint32_t kgd_gfx_v11_disable_debug_trap(struct amdgpu_device *adev,
+                                               bool keep_trap_enabled,
+                                               uint32_t vmid)
+{
+       uint32_t data = 0;
+
+       data = REG_SET_FIELD(data, SPI_GDBG_PER_VMID_CNTL, TRAP_EN, keep_trap_enabled);
+       data = REG_SET_FIELD(data, SPI_GDBG_PER_VMID_CNTL, EXCP_EN, 0);
+       data = REG_SET_FIELD(data, SPI_GDBG_PER_VMID_CNTL, EXCP_REPLACE, 0);
+
+       return data;
+}
+
 const struct kfd2kgd_calls gfx_v11_kfd2kgd = {
        .program_sh_mem_settings = program_sh_mem_settings_v11,
        .set_pasid_vmid_mapping = set_pasid_vmid_mapping_v11,
@@ -623,4 +659,6 @@ const struct kfd2kgd_calls gfx_v11_kfd2kgd = {
        .wave_control_execute = wave_control_execute_v11,
        .get_atc_vmid_pasid_mapping_info = NULL,
        .set_vm_context_page_table_base = set_vm_context_page_table_base_v11,
+       .enable_debug_trap = kgd_gfx_v11_enable_debug_trap,
+       .disable_debug_trap = kgd_gfx_v11_disable_debug_trap
 };