3 files changed, 32 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index 2fcad344492f..8f6d862a1882 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -109,6 +109,32 @@ extern int evergreen_rlc_resume(struct radeon_device *rdev);
 extern void rv770_set_clk_bypass_mode(struct radeon_device *rdev);
 
 /**
+ * r600_get_allowed_info_register - fetch the register for the info ioctl
+ *
+ * @rdev: radeon_device pointer
+ * @reg: register offset in bytes
+ * @val: register value
+ *
+ * Returns 0 for success or -EINVAL for an invalid register
+ *
+ */
+int r600_get_allowed_info_register(struct radeon_device *rdev,
+                                   u32 reg, u32 *val)
+{
+        switch (reg) {
+        case GRBM_STATUS:
+        case GRBM_STATUS2:
+        case R_000E50_SRBM_STATUS:
+        case DMA_STATUS_REG:
+        case UVD_STATUS:
+                *val = RREG32(reg);
+                return 0;
+        default:
+                return -EINVAL;
+        }
+}
+
+/**
  * r600_get_xclk - get the xclk
  *
  * @rdev: radeon_device pointer
diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index 558be7a88b2f..f2c343717c4b 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -940,6 +940,7 @@ static struct radeon_asic r600_asic = {
         .mc_wait_for_idle = &r600_mc_wait_for_idle,
         .get_xclk = &r600_get_xclk,
         .get_gpu_clock_counter = &r600_get_gpu_clock_counter,
+        .get_allowed_info_register = r600_get_allowed_info_register,
         .gart = {
                 .tlb_flush = &r600_pcie_gart_tlb_flush,
                 .get_page_entry = &rs600_gart_get_page_entry,
@@ -1024,6 +1025,7 @@ static struct radeon_asic rv6xx_asic = {
         .mc_wait_for_idle = &r600_mc_wait_for_idle,
         .get_xclk = &r600_get_xclk,
         .get_gpu_clock_counter = &r600_get_gpu_clock_counter,
+        .get_allowed_info_register = r600_get_allowed_info_register,
         .gart = {
                 .tlb_flush = &r600_pcie_gart_tlb_flush,
                 .get_page_entry = &rs600_gart_get_page_entry,
@@ -1116,6 +1118,7 @@ static struct radeon_asic rs780_asic = {
         .mc_wait_for_idle = &r600_mc_wait_for_idle,
         .get_xclk = &r600_get_xclk,
         .get_gpu_clock_counter = &r600_get_gpu_clock_counter,
+        .get_allowed_info_register = r600_get_allowed_info_register,
         .gart = {
                 .tlb_flush = &r600_pcie_gart_tlb_flush,
                 .get_page_entry = &rs600_gart_get_page_entry,
@@ -1221,6 +1224,7 @@ static struct radeon_asic rv770_asic = {
         .mc_wait_for_idle = &r600_mc_wait_for_idle,
         .get_xclk = &rv770_get_xclk,
         .get_gpu_clock_counter = &r600_get_gpu_clock_counter,
+        .get_allowed_info_register = r600_get_allowed_info_register,
         .gart = {
                 .tlb_flush = &r600_pcie_gart_tlb_flush,
                 .get_page_entry = &rs600_gart_get_page_entry,
diff --git a/drivers/gpu/drm/radeon/radeon_asic.h b/drivers/gpu/drm/radeon/radeon_asic.h
index 4259daf94d91..3e1346d585b3 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.h
+++ b/drivers/gpu/drm/radeon/radeon_asic.h
@@ -384,6 +384,8 @@ u32 r600_gfx_get_wptr(struct radeon_device *rdev,
                       struct radeon_ring *ring);
 void r600_gfx_set_wptr(struct radeon_device *rdev,
                        struct radeon_ring *ring);
+int r600_get_allowed_info_register(struct radeon_device *rdev,
+                                   u32 reg, u32 *val);
 /* r600 irq */
 int r600_irq_process(struct radeon_device *rdev);
 int r600_irq_init(struct radeon_device *rdev);