} ring[RADEON_NUM_RINGS];
 
        int (*ring_test)(struct radeon_device *rdev, struct radeon_ring *cp);
-       int (*irq_set)(struct radeon_device *rdev);
-       int (*irq_process)(struct radeon_device *rdev);
+
+       struct {
+               int (*set)(struct radeon_device *rdev);
+               int (*process)(struct radeon_device *rdev);
+       } irq;
+
        u32 (*get_vblank_counter)(struct radeon_device *rdev, int crtc);
 
        struct {
         * through ring.
         */
        void (*ioctl_wait_idle)(struct radeon_device *rdev, struct radeon_bo *bo);
+       /* check if 3D engine is idle */
        bool (*gui_idle)(struct radeon_device *rdev);
        /* power management */
        struct {
 #define radeon_ring_test(rdev, cp) (rdev)->asic->ring_test((rdev), (cp))
 #define radeon_ring_ib_execute(rdev, r, ib) (rdev)->asic->ring[(r)].ib_execute((rdev), (ib))
 #define radeon_ring_ib_parse(rdev, r, ib) (rdev)->asic->ring[(r)].ib_parse((rdev), (ib))
-#define radeon_irq_set(rdev) (rdev)->asic->irq_set((rdev))
-#define radeon_irq_process(rdev) (rdev)->asic->irq_process((rdev))
+#define radeon_irq_set(rdev) (rdev)->asic->irq.set((rdev))
+#define radeon_irq_process(rdev) (rdev)->asic->irq.process((rdev))
 #define radeon_get_vblank_counter(rdev, crtc) (rdev)->asic->get_vblank_counter((rdev), (crtc))
 #define radeon_fence_ring_emit(rdev, r, fence) (rdev)->asic->ring[(r)].emit_fence((rdev), (fence))
 #define radeon_semaphore_ring_emit(rdev, r, cp, semaphore, emit_wait) (rdev)->asic->ring[(r)].emit_semaphore((rdev), (cp), (semaphore), (emit_wait))
 
                        .cs_parse = &r100_cs_parse,
                }
        },
-       .irq_set = &r100_irq_set,
-       .irq_process = &r100_irq_process,
+       .irq = {
+               .set = &r100_irq_set,
+               .process = &r100_irq_process,
+       },
        .get_vblank_counter = &r100_get_vblank_counter,
        .copy = {
                .blit = &r100_copy_blit,
                        .cs_parse = &r100_cs_parse,
                }
        },
-       .irq_set = &r100_irq_set,
-       .irq_process = &r100_irq_process,
+       .irq = {
+               .set = &r100_irq_set,
+               .process = &r100_irq_process,
+       },
        .get_vblank_counter = &r100_get_vblank_counter,
        .copy = {
                .blit = &r100_copy_blit,
                        .cs_parse = &r300_cs_parse,
                }
        },
-       .irq_set = &r100_irq_set,
-       .irq_process = &r100_irq_process,
+       .irq = {
+               .set = &r100_irq_set,
+               .process = &r100_irq_process,
+       },
        .get_vblank_counter = &r100_get_vblank_counter,
        .copy = {
                .blit = &r100_copy_blit,
                        .cs_parse = &r300_cs_parse,
                }
        },
-       .irq_set = &r100_irq_set,
-       .irq_process = &r100_irq_process,
+       .irq = {
+               .set = &r100_irq_set,
+               .process = &r100_irq_process,
+       },
        .get_vblank_counter = &r100_get_vblank_counter,
        .copy = {
                .blit = &r100_copy_blit,
                        .cs_parse = &r300_cs_parse,
                }
        },
-       .irq_set = &r100_irq_set,
-       .irq_process = &r100_irq_process,
+       .irq = {
+               .set = &r100_irq_set,
+               .process = &r100_irq_process,
+       },
        .get_vblank_counter = &r100_get_vblank_counter,
        .copy = {
                .blit = &r100_copy_blit,
                        .cs_parse = &r300_cs_parse,
                }
        },
-       .irq_set = &r100_irq_set,
-       .irq_process = &r100_irq_process,
+       .irq = {
+               .set = &r100_irq_set,
+               .process = &r100_irq_process,
+       },
        .get_vblank_counter = &r100_get_vblank_counter,
        .copy = {
                .blit = &r100_copy_blit,
                        .cs_parse = &r300_cs_parse,
                }
        },
-       .irq_set = &rs600_irq_set,
-       .irq_process = &rs600_irq_process,
+       .irq = {
+               .set = &rs600_irq_set,
+               .process = &rs600_irq_process,
+       },
        .get_vblank_counter = &rs600_get_vblank_counter,
        .copy = {
                .blit = &r100_copy_blit,
                        .cs_parse = &r300_cs_parse,
                }
        },
-       .irq_set = &rs600_irq_set,
-       .irq_process = &rs600_irq_process,
+       .irq = {
+               .set = &rs600_irq_set,
+               .process = &rs600_irq_process,
+       },
        .get_vblank_counter = &rs600_get_vblank_counter,
        .copy = {
                .blit = &r100_copy_blit,
                        .cs_parse = &r300_cs_parse,
                }
        },
-       .irq_set = &rs600_irq_set,
-       .irq_process = &rs600_irq_process,
+       .irq = {
+               .set = &rs600_irq_set,
+               .process = &rs600_irq_process,
+       },
        .get_vblank_counter = &rs600_get_vblank_counter,
        .copy = {
                .blit = &r100_copy_blit,
                        .cs_parse = &r300_cs_parse,
                }
        },
-       .irq_set = &rs600_irq_set,
-       .irq_process = &rs600_irq_process,
+       .irq = {
+               .set = &rs600_irq_set,
+               .process = &rs600_irq_process,
+       },
        .get_vblank_counter = &rs600_get_vblank_counter,
        .copy = {
                .blit = &r100_copy_blit,
                        .cs_parse = &r600_cs_parse,
                }
        },
-       .irq_set = &r600_irq_set,
-       .irq_process = &r600_irq_process,
+       .irq = {
+               .set = &r600_irq_set,
+               .process = &r600_irq_process,
+       },
        .get_vblank_counter = &rs600_get_vblank_counter,
        .copy = {
                .blit = &r600_copy_blit,
                        .cs_parse = &r600_cs_parse,
                }
        },
-       .irq_set = &r600_irq_set,
-       .irq_process = &r600_irq_process,
+       .irq = {
+               .set = &r600_irq_set,
+               .process = &r600_irq_process,
+       },
        .get_vblank_counter = &rs600_get_vblank_counter,
        .copy = {
                .blit = &r600_copy_blit,
                        .cs_parse = &r600_cs_parse,
                }
        },
-       .irq_set = &r600_irq_set,
-       .irq_process = &r600_irq_process,
+       .irq = {
+               .set = &r600_irq_set,
+               .process = &r600_irq_process,
+       },
        .get_vblank_counter = &rs600_get_vblank_counter,
        .copy = {
                .blit = &r600_copy_blit,
                        .cs_parse = &evergreen_cs_parse,
                }
        },
-       .irq_set = &evergreen_irq_set,
-       .irq_process = &evergreen_irq_process,
+       .irq = {
+               .set = &evergreen_irq_set,
+               .process = &evergreen_irq_process,
+       },
        .get_vblank_counter = &evergreen_get_vblank_counter,
        .copy = {
                .blit = &r600_copy_blit,
                        .cs_parse = &evergreen_cs_parse,
                },
        },
-       .irq_set = &evergreen_irq_set,
-       .irq_process = &evergreen_irq_process,
+       .irq = {
+               .set = &evergreen_irq_set,
+               .process = &evergreen_irq_process,
+       },
        .get_vblank_counter = &evergreen_get_vblank_counter,
        .copy = {
                .blit = &r600_copy_blit,
                        .cs_parse = &evergreen_cs_parse,
                }
        },
-       .irq_set = &evergreen_irq_set,
-       .irq_process = &evergreen_irq_process,
+       .irq = {
+               .set = &evergreen_irq_set,
+               .process = &evergreen_irq_process,
+       },
        .get_vblank_counter = &evergreen_get_vblank_counter,
        .copy = {
                .blit = &r600_copy_blit,
                        .cs_parse = &evergreen_cs_parse,
                }
        },
-       .irq_set = &evergreen_irq_set,
-       .irq_process = &evergreen_irq_process,
+       .irq = {
+               .set = &evergreen_irq_set,
+               .process = &evergreen_irq_process,
+       },
        .get_vblank_counter = &evergreen_get_vblank_counter,
        .copy = {
                .blit = &r600_copy_blit,