/* i915_drv.h -- Private header for the I915 driver -*- linux-c -*- */ /* * * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sub license, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice (including the * next paragraph) shall be included in all copies or substantial portions * of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * */ #ifndef _I915_DRV_H_ #define _I915_DRV_H_ #include "i915_reg.h" #include "intel_bios.h" #include "intel_ringbuffer.h" #include #include #include /* General customization: */ #define DRIVER_AUTHOR "Tungsten Graphics, Inc." #define DRIVER_NAME "i915" #define DRIVER_DESC "Intel Graphics" #define DRIVER_DATE "20080730" enum pipe { PIPE_A = 0, PIPE_B, PIPE_C, I915_MAX_PIPES }; #define pipe_name(p) ((p) + 'A') enum plane { PLANE_A = 0, PLANE_B, PLANE_C, }; #define plane_name(p) ((p) + 'A') #define I915_GEM_GPU_DOMAINS (~(I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT)) #define for_each_pipe(p) for ((p) = 0; (p) < dev_priv->num_pipe; (p)++) /* Interface history: * * 1.1: Original. * 1.2: Add Power Management * 1.3: Add vblank support * 1.4: Fix cmdbuffer path, add heap destroy * 1.5: Add vblank pipe configuration * 1.6: - New ioctl for scheduling buffer swaps on vertical blank * - Support vertical blank on secondary display pipe */ #define DRIVER_MAJOR 1 #define DRIVER_MINOR 6 #define DRIVER_PATCHLEVEL 0 #define WATCH_COHERENCY 0 #define WATCH_LISTS 0 #define I915_GEM_PHYS_CURSOR_0 1 #define I915_GEM_PHYS_CURSOR_1 2 #define I915_GEM_PHYS_OVERLAY_REGS 3 #define I915_MAX_PHYS_OBJECT (I915_GEM_PHYS_OVERLAY_REGS) struct drm_i915_gem_phys_object { int id; struct page **page_list; drm_dma_handle_t *handle; struct drm_i915_gem_object *cur_obj; }; struct mem_block { struct mem_block *next; struct mem_block *prev; int start; int size; struct drm_file *file_priv; /* NULL: free, -1: heap, other: real files */ }; struct opregion_header; struct opregion_acpi; struct opregion_swsci; struct opregion_asle; struct intel_opregion { struct opregion_header *header; struct opregion_acpi *acpi; struct opregion_swsci *swsci; struct opregion_asle *asle; void *vbt; u32 __iomem *lid_state; }; #define OPREGION_SIZE (8*1024) struct intel_overlay; struct intel_overlay_error_state; struct drm_i915_master_private { drm_local_map_t *sarea; struct _drm_i915_sarea *sarea_priv; }; #define I915_FENCE_REG_NONE -1 struct drm_i915_fence_reg { struct list_head lru_list; struct drm_i915_gem_object *obj; uint32_t setup_seqno; }; struct sdvo_device_mapping { u8 initialized; u8 dvo_port; u8 slave_addr; u8 dvo_wiring; u8 i2c_pin; u8 i2c_speed; u8 ddc_pin; }; struct intel_display_error_state; struct drm_i915_error_state { u32 eir; u32 pgtbl_er; u32 pipestat[I915_MAX_PIPES]; u32 ipeir; u32 ipehr; u32 instdone; u32 acthd; u32 error; /* gen6+ */ u32 bcs_acthd; /* gen6+ blt engine */ u32 bcs_ipehr; u32 bcs_ipeir; u32 bcs_instdone; u32 bcs_seqno; u32 vcs_acthd; /* gen6+ bsd engine */ u32 vcs_ipehr; u32 vcs_ipeir; u32 vcs_instdone; u32 vcs_seqno; u32 instpm; u32 instps; u32 instdone1; u32 seqno; u64 bbaddr; u64 fence[16]; struct timeval time; struct drm_i915_error_object { int page_count; u32 gtt_offset; u32 *pages[0]; } *ringbuffer[I915_NUM_RINGS], *batchbuffer[I915_NUM_RINGS]; struct drm_i915_error_buffer { u32 size; u32 name; u32 seqno; u32 gtt_offset; u32 read_domains; u32 write_domain; s32 fence_reg:5; s32 pinned:2; u32 tiling:2; u32 dirty:1; u32 purgeable:1; u32 ring:4; u32 cache_level:2; } *active_bo, *pinned_bo; u32 active_bo_count, pinned_bo_count; struct intel_overlay_error_state *overlay; struct intel_display_error_state *display; }; struct drm_i915_display_funcs { void (*dpms)(struct drm_crtc *crtc, int mode); bool (*fbc_enabled)(struct drm_device *dev); void (*enable_fbc)(struct drm_crtc *crtc, unsigned long interval); void (*disable_fbc)(struct drm_device *dev); int (*get_display_clock_speed)(struct drm_device *dev); int (*get_fifo_size)(struct drm_device *dev, int plane); void (*update_wm)(struct drm_device *dev); int (*crtc_mode_set)(struct drm_crtc *crtc, struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode, int x, int y, struct drm_framebuffer *old_fb); void (*fdi_link_train)(struct drm_crtc *crtc); void (*init_clock_gating)(struct drm_device *dev); void (*init_pch_clock_gating)(struct drm_device *dev); /* clock updates for mode set */ /* cursor updates */ /* render clock increase/decrease */ /* display clock increase/decrease */ /* pll clock increase/decrease */ }; struct intel_device_info { u8 gen; u8 is_mobile : 1; u8 is_i85x : 1; u8 is_i915g : 1; u8 is_i945gm : 1; u8 is_g33 : 1; u8 need_gfx_hws : 1; u8 is_g4x : 1; u8 is_pineview : 1; u8 is_broadwater : 1; u8 is_crestline : 1; u8 is_ivybridge : 1; u8 has_fbc : 1; u8 has_pipe_cxsr : 1; u8 has_hotplug : 1; u8 cursor_needs_physical : 1; u8 has_overlay : 1; u8 overlay_needs_physical : 1; u8 supports_tv : 1; u8 has_bsd_ring : 1; u8 has_blt_ring : 1; }; enum no_fbc_reason { FBC_NO_OUTPUT, /* no outputs enabled to compress */ FBC_STOLEN_TOO_SMALL, /* not enough space to hold compressed buffers */ FBC_UNSUPPORTED_MODE, /* interlace or doublescanned mode */ FBC_MODE_TOO_LARGE, /* mode too large for compression */ FBC_BAD_PLANE, /* fbc not supported on plane */ FBC_NOT_TILED, /* buffer not tiled */ FBC_MULTIPLE_PIPES, /* more than one pipe active */ FBC_MODULE_PARAM, }; enum intel_pch { PCH_IBX, /* Ibexpeak PCH */ PCH_CPT, /* Cougarpoint PCH */ }; #define QUIRK_PIPEA_FORCE (1<<0) struct intel_fbdev; typedef struct drm_i915_private { struct drm_device *dev; const struct intel_device_info *info; int has_gem; int relative_constants_mode; void __iomem *regs; struct intel_gmbus { struct i2c_adapter adapter; struct i2c_adapter *force_bit; u32 reg0; } *gmbus; struct pci_dev *bridge_dev; struct intel_ring_buffer ring[I915_NUM_RINGS]; uint32_t next_seqno; drm_dma_handle_t *status_page_dmah; uint32_t counter; drm_local_map_t hws_map; struct drm_i915_gem_object *pwrctx; struct drm_i915_gem_object *renderctx; struct resource mch_res; unsigned int cpp; int back_offset; int front_offset; int current_page; int page_flipping; atomic_t irq_received; /* protects the irq masks */ spinlock_t irq_lock; /** Cached value of IMR to avoid reads in updating the bitfield */ u32 pipestat[2]; u32 irq_mask; u32 gt_irq_mask; u32 pch_irq_mask; u32 hotplug_supported_mask; struct work_struct hotplug_work; int tex_lru_log_granularity; int allow_batchbuffer; struct mem_block *agp_heap; unsigned int sr01, adpa, ppcr, dvob, dvoc, lvds; int vblank_pipe; int num_pipe; /* For hangcheck timer */ #define DRM_I915_HANGCHECK_PERIOD 1500 /* in ms */ struct timer_list hangcheck_timer; int hangcheck_count; uint32_t last_acthd; uint32_t last_instdone; uint32_t last_instdone1; unsigned long cfb_size; unsigned long cfb_pitch; unsigned long cfb_offset; int cfb_fence; int cfb_plane; int cfb_y; struct intel_opregion opregion; /* overlay */ struct intel_overlay *overlay; /* LVDS info */ int backlight_level; /* restore backlight to this value */ bool backlight_enabled; struct drm_display_mode *panel_fixed_mode; struct drm_display_mode *lfp_lvds_vbt_mode; /* if any */ struct drm_display_mode *sdvo_lvds_vbt_mode; /* if any */ /* Feature bits from the VBIOS */ unsigned int int_tv_support:1; unsigned int lvds_dither:1; unsigned int lvds_vbt:1; unsigned int int_crt_support:1; unsigned int lvds_use_ssc:1; int lvds_ssc_freq; struct { int rate; int lanes; int preemphasis; int vswing; bool initialized; bool support; int bpp; struct edp_power_seq pps; } edp; bool no_aux_handshake; struct notifier_block lid_notifier; int crt_ddc_pin; struct drm_i915_fence_reg fence_regs[16]; /* assume 965 */ int fence_reg_start; /* 4 if userland hasn't ioctl'd us yet */ int num_fence_regs; /* 8 on pre-965, 16 otherwise */ unsigned int fsb_freq, mem_freq, is_ddr3; spinlock_t error_lock; struct drm_i915_error_state *first_error; struct work_struct error_work; struct completion error_completion; struct workqueue_struct *wq; /* Display functions */ struct drm_i915_display_funcs display; /* PCH chipset type */ enum intel_pch pch_type; unsigned long quirks; /* Register state */ bool modeset_on_lid; u8 saveLBB; u32 saveDSPACNTR; u32 saveDSPBCNTR; u32 saveDSPARB; u32 saveHWS; u32 savePIPEACONF; u32 savePIPEBCONF; u32 savePIPEASRC; u32 savePIPEBSRC; u32 saveFPA0; u32 saveFPA1; u32 saveDPLL_A; u32 saveDPLL_A_MD; u32 saveHTOTAL_A; u32 saveHBLANK_A; u32 saveHSYNC_A; u32 saveVTOTAL_A; u32 saveVBLANK_A; u32 saveVSYNC_A; u32 saveBCLRPAT_A; u32 saveTRANSACONF; u32 saveTRANS_HTOTAL_A; u32 saveTRANS_HBLANK_A; u32 saveTRANS_HSYNC_A; u32 saveTRANS_VTOTAL_A; u32 saveTRANS_VBLANK_A; u32 saveTRANS_VSYNC_A; u32 savePIPEASTAT; u32 saveDSPASTRIDE; u32 saveDSPASIZE; u32 saveDSPAPOS; u32 saveDSPAADDR; u32 saveDSPASURF; u32 saveDSPATILEOFF; u32 savePFIT_PGM_RATIOS; u32 saveBLC_HIST_CTL; u32 saveBLC_PWM_CTL; u32 saveBLC_PWM_CTL2; u32 saveBLC_CPU_PWM_CTL; u32 saveBLC_CPU_PWM_CTL2; u32 saveFPB0; u32 saveFPB1; u32 saveDPLL_B; u32 saveDPLL_B_MD; u32 saveHTOTAL_B; u32 saveHBLANK_B; u32 saveHSYNC_B; u32 saveVTOTAL_B; u32 saveVBLANK_B; u32 saveVSYNC_B; u32 saveBCLRPAT_B; u32 saveTRANSBCONF; u32 saveTRANS_HTOTAL_B; u32 saveTRANS_HBLANK_B; u32 saveTRANS_HSYNC_B; u32 saveTRANS_VTOTAL_B; u32 saveTRANS_VBLANK_B; u32 saveTRANS_VSYNC_B; u32 savePIPEBSTAT; u32 saveDSPBSTRIDE; u32 saveDSPBSIZE; u32 saveDSPBPOS; u32 saveDSPBADDR; u32 saveDSPBSURF; u32 saveDSPBTILEOFF; u32 saveVGA0; u32 saveVGA1; u32 saveVGA_PD; u32 saveVGACNTRL; u32 saveADPA; u32 saveLVDS; u32 savePP_ON_DELAYS; u32 savePP_OFF_DELAYS; u32 saveDVOA; u32 saveDVOB; u32 saveDVOC; u32 savePP_ON; u32 savePP_OFF; u32 savePP_CONTROL; u32 savePP_DIVISOR; u32 savePFIT_CONTROL; u32 save_palette_a[256]; u32 save_palette_b[256]; u32 saveDPFC_CB_BASE; u32 saveFBC_CFB_BASE; u32 saveFBC_LL_BASE; u32 saveFBC_CONTROL; u32 saveFBC_CONTROL2; u32 saveIER; u32 saveIIR; u32 saveIMR; u32 saveDEIER; u32 saveDEIMR; u32 saveGTIER; u32 saveGTIMR; u32 saveFDI_RXA_IMR; u32 saveFDI_RXB_IMR; u32 saveCACHE_MODE_0; u32 saveMI_ARB_STATE; u32 saveSWF0[16]; u32 saveSWF1[16]; u32 saveSWF2[3]; u8 saveMSR; u8 saveSR[8]; u8 saveGR[25]; u8 saveAR_INDEX; u8 saveAR[21]; u8 saveDACMASK; u8 saveCR[37]; uint64_t saveFENCE[16]; u32 saveCURACNTR; u32 saveCURAPOS; u32 saveCURABASE; u32 saveCURBCNTR; u32 saveCURBPOS; u32 saveCURBBASE; u32 saveCURSIZE; u32 saveDP_B; u32 saveDP_C; u32 saveDP_D; u32 savePIPEA_GMCH_DATA_M; u32 savePIPEB_GMCH_DATA_M; u32 savePIPEA_GMCH_DATA_N; u32 savePIPEB_GMCH_DATA_N; u32 savePIPEA_DP_LINK_M; u32 savePIPEB_DP_LINK_M; u32 savePIPEA_DP_LINK_N; u32 savePIPEB_DP_LINK_N; u32 saveFDI_RXA_CTL; u32 saveFDI_TXA_CTL; u32 saveFDI_RXB_CTL; u32 saveFDI_TXB_CTL; u32 savePFA_CTL_1; u32 savePFB_CTL_1; u32 savePFA_WIN_SZ; u32 savePFB_WIN_SZ; u32 savePFA_WIN_POS; u32 savePFB_WIN_POS; u32 savePCH_DREF_CONTROL; u32 saveDISP_ARB_CTL; u32 savePIPEA_DATA_M1; u32 savePIPEA_DATA_N1; u32 savePIPEA_LINK_M1; u32 savePIPEA_LINK_N1; u32 savePIPEB_DATA_M1; u32 savePIPEB_DATA_N1; u32 savePIPEB_LINK_M1; u32 savePIPEB_LINK_N1; u32 saveMCHBAR_RENDER_STANDBY; struct { /** Bridge to intel-gtt-ko */ const struct intel_gtt *gtt; /** Memory allocator for GTT stolen memory */ struct drm_mm stolen; /** Memory allocator for GTT */ struct drm_mm gtt_space; /** List of all objects in gtt_space. Used to restore gtt * mappings on resume */ struct list_head gtt_list; /** Usable portion of the GTT for GEM */ unsigned long gtt_start; unsigned long gtt_mappable_end; unsigned long gtt_end; struct io_mapping *gtt_mapping; int gtt_mtrr; struct shrinker inactive_shrinker; /** * List of objects currently involved in rendering. * * Includes buffers having the contents of their GPU caches * flushed, not necessarily primitives. last_rendering_seqno * represents when the rendering involved will be completed. * * A reference is held on the buffer while on this list. */ struct list_head active_list; /** * List of objects which are not in the ringbuffer but which * still have a write_domain which needs to be flushed before * unbinding. * * last_rendering_seqno is 0 while an object is in this list. * * A reference is held on the buffer while on this list. */ struct list_head flushing_list; /** * LRU list of objects which are not in the ringbuffer and * are ready to unbind, but are still in the GTT. * * last_rendering_seqno is 0 while an object is in this list. * * A reference is not held on the buffer while on this list, * as merely being GTT-bound shouldn't prevent its being * freed, and we'll pull it off the list in the free path. */ struct list_head inactive_list; /** * LRU list of objects which are not in the ringbuffer but * are still pinned in the GTT. */ struct list_head pinned_list; /** LRU list of objects with fence regs on them. */ struct list_head fence_list; /** * List of objects currently pending being freed. * * These objects are no longer in use, but due to a signal * we were prevented from freeing them at the appointed time. */ struct list_head deferred_free_list; /** * We leave the user IRQ off as much as possible, * but this means that requests will finish and never * be retired once the system goes idle. Set a timer to * fire periodically while the ring is running. When it * fires, go retire requests. */ struct delayed_work retire_work; /** * Are we in a non-interruptible section of code like * modesetting? */ bool interruptible; /** * Flag if the X Server, and thus DRM, is not currently in * control of the device. * * This is set between LeaveVT and EnterVT. It needs to be * replaced with a semaphore. It also needs to be * transitioned away from for kernel modesetting. */ int suspended; /** * Flag if the hardware appears to be wedged. * * This is set when attempts to idle the device timeout. * It prevents command submission from occurring and makes * every pending request fail */ atomic_t wedged; /** Bit 6 swizzling required for X tiling */ uint32_t bit_6_swizzle_x; /** Bit 6 swizzling required for Y tiling */ uint32_t bit_6_swizzle_y; /* storage for physical objects */ struct drm_i915_gem_phys_object *phys_objs[I915_MAX_PHYS_OBJECT]; /* accounting, useful for userland debugging */ size_t gtt_total; size_t mappable_gtt_total; size_t object_memory; u32 object_count; } mm; struct sdvo_device_mapping sdvo_mappings[2]; /* indicate whether the LVDS_BORDER should be enabled or not */ unsigned int lvds_border_bits; /* Panel fitter placement and size for Ironlake+ */ u32 pch_pf_pos, pch_pf_size; int panel_t3, panel_t12; struct drm_crtc *plane_to_crtc_mapping[2]; struct drm_crtc *pipe_to_crtc_mapping[2]; wait_queue_head_t pending_flip_queue; bool flip_pending_is_done; /* Reclocking support */ bool render_reclock_avail; bool lvds_downclock_avail; /* indicates the reduced downclock for LVDS*/ int lvds_downclock; struct work_struct idle_work; struct timer_list idle_timer; bool busy; u16 orig_clock; int child_dev_num; struct child_device_config *child_dev; struct drm_connector *int_lvds_connector; bool mchbar_need_disable; struct work_struct rps_work; spinlock_t rps_lock; u32 pm_iir; u8 cur_delay; u8 min_delay; u8 max_delay; u8 fmax; u8 fstart; u64 last_count1; unsigned long last_time1; u64 last_count2; struct timespec last_time2; unsigned long gfx_power; int c_m; int r_t; u8 corr; spinlock_t *mchdev_lock; enum no_fbc_reason no_fbc_reason; struct drm_mm_node *compressed_fb; struct drm_mm_node *compressed_llb; unsigned long last_gpu_reset; /* list of fbdev register on this device */ struct intel_fbdev *fbdev; struct drm_property *broadcast_rgb_property; struct drm_property *force_audio_property; atomic_t forcewake_count; } drm_i915_private_t; enum i915_cache_level { I915_CACHE_NONE, I915_CACHE_LLC, I915_CACHE_LLC_MLC, /* gen6+ */ }; struct drm_i915_gem_object { struct drm_gem_object base; /** Current space allocated to this object in the GTT, if any. */ struct drm_mm_node *gtt_space; struct list_head gtt_list; /** This object's place on the active/flushing/inactive lists */ struct list_head ring_list; struct list_head mm_list; /** This object's place on GPU write list */ struct list_head gpu_write_list; /** This object's place in the batchbuffer or on the eviction list */ struct list_head exec_list; /** * This is set if the object is on the active or flushing lists * (has pending rendering), and is not set if it's on inactive (ready * to be unbound). */ unsigned int active : 1; /** * This is set if the object has been written to since last bound * to the GTT */ unsigned int dirty : 1; /** * This is set if the object has been written to since the last * GPU flush. */ unsigned int pending_gpu_write : 1; /** * Fence register bits (if any) for this object. Will be set * as needed when mapped into the GTT. * Protected by dev->struct_mutex. * * Size: 4 bits for 16 fences + sign (for FENCE_REG_NONE) */ signed int fence_reg : 5; /** * Advice: are the backing pages purgeable? */ unsigned int madv : 2; /** * Current tiling mode for the object. */ unsigned int tiling_mode : 2; unsigned int tiling_changed : 1; /** How many users have pinned this object in GTT space. The following * users can each hold at most one reference: pwrite/pread, pin_ioctl * (via user_pin_count), execbuffer (objects are not allowed multiple * times for the same batchbuffer), and the framebuffer code. When * switching/pageflipping, the framebuffer code has at most two buffers * pinned per crtc. * * In the worst case this is 1 + 1 + 1 + 2*2 = 7. That would fit into 3 * bits with absolutely no headroom. So use 4 bits. */ unsigned int pin_count : 4; #define DRM_I915_GEM_OBJECT_MAX_PIN_COUNT 0xf /** * Is the object at the current location in the gtt mappable and * fenceable? Used to avoid costly recalculations. */ unsigned int map_and_fenceable : 1; /** * Whether the current gtt mapping needs to be mappable (and isn't just * mappable by accident). Track pin and fault separate for a more * accurate mappable working set. */ unsigned int fault_mappable : 1; unsigned int pin_mappable : 1; /* * Is the GPU currently using a fence to access this buffer, */ unsigned int pending_fenced_gpu_access:1; unsigned int fenced_gpu_access:1; unsigned int cache_level:2; struct page **pages; /** * DMAR support */ struct scatterlist *sg_list; int num_sg; /** * Used for performing relocations during execbuffer insertion. */ struct hlist_node exec_node; unsigned long exec_handle; struct drm_i915_gem_exec_object2 *exec_entry; /** * Current offset of the object in GTT space. * * This is the same as gtt_space->start */ uint32_t gtt_offset; /** Breadcrumb of last rendering to the buffer. */ uint32_t last_rendering_seqno; struct intel_ring_buffer *ring; /** Breadcrumb of last fenced GPU access to the buffer. */ uint32_t last_fenced_seqno; struct intel_ring_buffer *last_fenced_ring; /** Current tiling stride for the object, if it's tiled. */ uint32_t stride; /** Record of address bit 17 of each page at last unbind. */ unsigned long *bit_17; /** * If present, while GEM_DOMAIN_CPU is in the read domain this array * flags which individual pages are valid. */ uint8_t *page_cpu_valid; /** User space pin count and filp owning the pin */ uint32_t user_pin_count; struct drm_file *pin_filp; /** for phy allocated objects */ struct drm_i915_gem_phys_object *phys_obj; /** * Number of crtcs where this object is currently the fb, but * will be page flipped away on the next vblank. When it * reaches 0, dev_priv->pending_flip_queue will be woken up. */ atomic_t pending_flip; }; #define to_intel_bo(x) container_of(x, struct drm_i915_gem_object, base) /** * Request queue structure. * * The request queue allows us to note sequence numbers that have been emitted * and may be associated with active buffers to be retired. * * By keeping this list, we can avoid having to do questionable * sequence-number comparisons on buffer last_rendering_seqnos, and associate * an emission time with seqnos for tracking how far ahead of the GPU we are. */ struct drm_i915_gem_request { /** On Which ring this request was generated */ struct intel_ring_buffer *ring; /** GEM sequence number associated with this request. */ uint32_t seqno; /** Time at which this request was emitted, in jiffies. */ unsigned long emitted_jiffies; /** global list entry for this request */ struct list_head list; struct drm_i915_file_private *file_priv; /** file_priv list entry for this request */ struct list_head client_list; }; struct drm_i915_file_private { struct { struct spinlock lock; struct list_head request_list; } mm; }; #define INTEL_INFO(dev) (((struct drm_i915_private *) (dev)->dev_private)->info) #define IS_I830(dev) ((dev)->pci_device == 0x3577) #define IS_845G(dev) ((dev)->pci_device == 0x2562) #define IS_I85X(dev) (INTEL_INFO(dev)->is_i85x) #define IS_I865G(dev) ((dev)->pci_device == 0x2572) #define IS_I915G(dev) (INTEL_INFO(dev)->is_i915g) #define IS_I915GM(dev) ((dev)->pci_device == 0x2592) #define IS_I945G(dev) ((dev)->pci_device == 0x2772) #define IS_I945GM(dev) (INTEL_INFO(dev)->is_i945gm) #define IS_BROADWATER(dev) (INTEL_INFO(dev)->is_broadwater) #define IS_CRESTLINE(dev) (INTEL_INFO(dev)->is_crestline) #define IS_GM45(dev) ((dev)->pci_device == 0x2A42) #define IS_G4X(dev) (INTEL_INFO(dev)->is_g4x) #define IS_PINEVIEW_G(dev) ((dev)->pci_device == 0xa001) #define IS_PINEVIEW_M(dev) ((dev)->pci_device == 0xa011) #define IS_PINEVIEW(dev) (INTEL_INFO(dev)->is_pineview) #define IS_G33(dev) (INTEL_INFO(dev)->is_g33) #define IS_IRONLAKE_D(dev) ((dev)->pci_device == 0x0042) #define IS_IRONLAKE_M(dev) ((dev)->pci_device == 0x0046) #define IS_IVYBRIDGE(dev) (INTEL_INFO(dev)->is_ivybridge) #define IS_MOBILE(dev) (INTEL_INFO(dev)->is_mobile) /* * The genX designation typically refers to the render engine, so render * capability related checks should use IS_GEN, while display and other checks * have their own (e.g. HAS_PCH_SPLIT for ILK+ display, IS_foo for particular * chips, etc.). */ #define IS_GEN2(dev) (INTEL_INFO(dev)->gen == 2) #define IS_GEN3(dev) (INTEL_INFO(dev)->gen == 3) #define IS_GEN4(dev) (INTEL_INFO(dev)->gen == 4) #define IS_GEN5(dev) (INTEL_INFO(dev)->gen == 5) #define IS_GEN6(dev) (INTEL_INFO(dev)->gen == 6) #define IS_GEN7(dev) (INTEL_INFO(dev)->gen == 7) #define HAS_BSD(dev) (INTEL_INFO(dev)->has_bsd_ring) #define HAS_BLT(dev) (INTEL_INFO(dev)->has_blt_ring) #define I915_NEED_GFX_HWS(dev) (INTEL_INFO(dev)->need_gfx_hws) #define HAS_OVERLAY(dev) (INTEL_INFO(dev)->has_overlay) #define OVERLAY_NEEDS_PHYSICAL(dev) (INTEL_INFO(dev)->overlay_needs_physical) /* With the 945 and later, Y tiling got adjusted so that it was 32 128-byte * rows, which changed the alignment requirements and fence programming. */ #define HAS_128_BYTE_Y_TILING(dev) (!IS_GEN2(dev) && !(IS_I915G(dev) || \ IS_I915GM(dev))) #define SUPPORTS_DIGITAL_OUTPUTS(dev) (!IS_GEN2(dev) && !IS_PINEVIEW(dev)) #define SUPPORTS_INTEGRATED_HDMI(dev) (IS_G4X(dev) || IS_GEN5(dev)) #define SUPPORTS_INTEGRATED_DP(dev) (IS_G4X(dev) || IS_GEN5(dev)) #define SUPPORTS_EDP(dev) (IS_IRONLAKE_M(dev)) #define SUPPORTS_TV(dev) (INTEL_INFO(dev)->supports_tv) #define I915_HAS_HOTPLUG(dev) (INTEL_INFO(dev)->has_hotplug) /* dsparb controlled by hw only */ #define DSPARB_HWCONTROL(dev) (IS_G4X(dev) || IS_IRONLAKE(dev)) #define HAS_FW_BLC(dev) (INTEL_INFO(dev)->gen > 2) #define HAS_PIPE_CXSR(dev) (INTEL_INFO(dev)->has_pipe_cxsr) #define I915_HAS_FBC(dev) (INTEL_INFO(dev)->has_fbc) #define HAS_PCH_SPLIT(dev) (IS_GEN5(dev) || IS_GEN6(dev) || IS_IVYBRIDGE(dev)) #define HAS_PIPE_CONTROL(dev) (INTEL_INFO(dev)->gen >= 5) #define INTEL_PCH_TYPE(dev) (((struct drm_i915_private *)(dev)->dev_private)->pch_type) #define HAS_PCH_CPT(dev) (INTEL_PCH_TYPE(dev) == PCH_CPT) #define HAS_PCH_IBX(dev) (INTEL_PCH_TYPE(dev) == PCH_IBX) #include "i915_trace.h" extern struct drm_ioctl_desc i915_ioctls[]; extern int i915_max_ioctl; extern unsigned int i915_fbpercrtc; extern int i915_panel_ignore_lid; extern unsigned int i915_powersave; extern unsigned int i915_semaphores; extern unsigned int i915_lvds_downclock; extern unsigned int i915_panel_use_ssc; extern int i915_vbt_sdvo_panel_type; extern unsigned int i915_enable_rc6; extern unsigned int i915_enable_fbc; extern int i915_suspend(struct drm_device *dev, pm_message_t state); extern int i915_resume(struct drm_device *dev); extern void i915_save_display(struct drm_device *dev); extern void i915_restore_display(struct drm_device *dev); extern int i915_master_create(struct drm_device *dev, struct drm_master *master); extern void i915_master_destroy(struct drm_device *dev, struct drm_master *master); /* i915_dma.c */ extern void i915_kernel_lost_context(struct drm_device * dev); extern int i915_driver_load(struct drm_device *, unsigned long flags); extern int i915_driver_unload(struct drm_device *); extern int i915_driver_open(struct drm_device *dev, struct drm_file *file_priv); extern void i915_driver_lastclose(struct drm_device * dev); extern void i915_driver_preclose(struct drm_device *dev, struct drm_file *file_priv); extern void i915_driver_postclose(struct drm_device *dev, struct drm_file *file_priv); extern int i915_driver_device_is_agp(struct drm_device * dev); extern long i915_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); extern int i915_emit_box(struct drm_device *dev, struct drm_clip_rect *box, int DR1, int DR4); extern int i915_reset(struct drm_device *dev, u8 flags); extern unsigned long i915_chipset_val(struct drm_i915_private *dev_priv); extern unsigned long i915_mch_val(struct drm_i915_private *dev_priv); extern unsigned long i915_gfx_val(struct drm_i915_private *dev_priv); extern void i915_update_gfx_val(struct drm_i915_private *dev_priv); /* i915_irq.c */ void i915_hangcheck_elapsed(unsigned long data); void i915_handle_error(struct drm_device *dev, bool wedged); extern int i915_irq_emit(struct drm_device *dev, void *data, struct drm_file *file_priv); extern int i915_irq_wait(struct drm_device *dev, void *data, struct drm_file *file_priv); extern irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS); extern void i915_driver_irq_preinstall(struct drm_device * dev); extern int i915_driver_irq_postinstall(struct drm_device *dev); extern void i915_driver_irq_uninstall(struct drm_device * dev); extern irqreturn_t ironlake_irq_handler(DRM_IRQ_ARGS); extern void ironlake_irq_preinstall(struct drm_device *dev); extern int ironlake_irq_postinstall(struct drm_device *dev); extern void ironlake_irq_uninstall(struct drm_device *dev); extern irqreturn_t ivybridge_irq_handler(DRM_IRQ_ARGS); extern void ivybridge_irq_preinstall(struct drm_device *dev); extern int ivybridge_irq_postinstall(struct drm_device *dev); extern void ivybridge_irq_uninstall(struct drm_device *dev); extern int i915_vblank_pipe_set(struct drm_device *dev, void *data, struct drm_file *file_priv); extern int i915_vblank_pipe_get(struct drm_device *dev, void *data, struct drm_file *file_priv); extern int i915_enable_vblank(struct drm_device *dev, int crtc); extern void i915_disable_vblank(struct drm_device *dev, int crtc); extern int ironlake_enable_vblank(struct drm_device *dev, int crtc); extern void ironlake_disable_vblank(struct drm_device *dev, int crtc); extern int ivybridge_enable_vblank(struct drm_device *dev, int crtc); extern void ivybridge_disable_vblank(struct drm_device *dev, int crtc); extern u32 i915_get_vblank_counter(struct drm_device *dev, int crtc); extern u32 gm45_get_vblank_counter(struct drm_device *dev, int crtc); extern int i915_vblank_swap(struct drm_device *dev, void *data, struct drm_file *file_priv); void i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask); void i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask); void intel_enable_asle (struct drm_device *dev); int i915_get_vblank_timestamp(struct drm_device *dev, int crtc, int *max_error, struct timeval *vblank_time, unsigned flags); int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe, int *vpos, int *hpos); #ifdef CONFIG_DEBUG_FS extern void i915_destroy_error_state(struct drm_device *dev); #else #define i915_destroy_error_state(x) #endif /* i915_mem.c */ extern int i915_mem_alloc(struct drm_device *dev, void *data, struct drm_file *file_priv); extern int i915_mem_free(struct drm_device *dev, void *data, struct drm_file *file_priv); extern int i915_mem_init_heap(struct drm_device *dev, void *data, struct drm_file *file_priv); extern int i915_mem_destroy_heap(struct drm_device *dev, void *data, struct drm_file *file_priv); extern void i915_mem_takedown(struct mem_block **heap); extern void i915_mem_release(struct drm_device * dev, struct drm_file *file_priv, struct mem_block *heap); /* i915_gem.c */ int i915_gem_init_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); int i915_gem_create_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); int i915_gem_pread_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); int i915_gem_pwrite_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); int i915_gem_mmap_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); int i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); int i915_gem_set_domain_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); int i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); int i915_gem_execbuffer(struct drm_device *dev, void *data, struct drm_file *file_priv); int i915_gem_execbuffer2(struct drm_device *dev, void *data, struct drm_file *file_priv); int i915_gem_pin_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); int i915_gem_unpin_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); int i915_gem_busy_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); int i915_gem_throttle_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); int i915_gem_madvise_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); int i915_gem_entervt_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); int i915_gem_leavevt_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); int i915_gem_set_tiling(struct drm_device *dev, void *data, struct drm_file *file_priv); int i915_gem_get_tiling(struct drm_device *dev, void *data, struct drm_file *file_priv); int i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); void i915_gem_load(struct drm_device *dev); int i915_gem_init_object(struct drm_gem_object *obj); int __must_check i915_gem_flush_ring(struct intel_ring_buffer *ring, uint32_t invalidate_domains, uint32_t flush_domains); struct drm_i915_gem_object *i915_gem_alloc_object(struct drm_device *dev, size_t size); void i915_gem_free_object(struct drm_gem_object *obj); int __must_check i915_gem_object_pin(struct drm_i915_gem_object *obj, uint32_t alignment, bool map_and_fenceable); void i915_gem_object_unpin(struct drm_i915_gem_object *obj); int __must_check i915_gem_object_unbind(struct drm_i915_gem_object *obj); void i915_gem_release_mmap(struct drm_i915_gem_object *obj); void i915_gem_lastclose(struct drm_device *dev); int __must_check i915_mutex_lock_interruptible(struct drm_device *dev); int __must_check i915_gem_object_wait_rendering(struct drm_i915_gem_object *obj); void i915_gem_object_move_to_active(struct drm_i915_gem_object *obj, struct intel_ring_buffer *ring, u32 seqno); int i915_gem_dumb_create(struct drm_file *file_priv, struct drm_device *dev, struct drm_mode_create_dumb *args); int i915_gem_mmap_gtt(struct drm_file *file_priv, struct drm_device *dev, uint32_t handle, uint64_t *offset); int i915_gem_dumb_destroy(struct drm_file *file_priv, struct drm_device *dev, uint32_t handle); /** * Returns true if seq1 is later than seq2. */ static inline bool i915_seqno_passed(uint32_t seq1, uint32_t seq2) { return (int32_t)(seq1 - seq2) >= 0; } static inline u32 i915_gem_next_request_seqno(struct intel_ring_buffer *ring) { drm_i915_private_t *dev_priv = ring->dev->dev_private; return ring->outstanding_lazy_request = dev_priv->next_seqno; } int __must_check i915_gem_object_get_fence(struct drm_i915_gem_object *obj, struct intel_ring_buffer *pipelined); int __must_check i915_gem_object_put_fence(struct drm_i915_gem_object *obj); void i915_gem_retire_requests(struct drm_device *dev); void i915_gem_reset(struct drm_device *dev); void i915_gem_clflush_object(struct drm_i915_gem_object *obj); int __must_check i915_gem_object_set_domain(struct drm_i915_gem_object *obj, uint32_t read_domains, uint32_t write_domain); int __must_check i915_gem_object_finish_gpu(struct drm_i915_gem_object *obj); int __must_check i915_gem_init_ringbuffer(struct drm_device *dev); void i915_gem_cleanup_ringbuffer(struct drm_device *dev); void i915_gem_do_init(struct drm_device *dev, unsigned long start, unsigned long mappable_end, unsigned long end); int __must_check i915_gpu_idle(struct drm_device *dev); int __must_check i915_gem_idle(struct drm_device *dev); int __must_check i915_add_request(struct intel_ring_buffer *ring, struct drm_file *file, struct drm_i915_gem_request *request); int __must_check i915_wait_request(struct intel_ring_buffer *ring, uint32_t seqno); int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf); int __must_check i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write); int __must_check i915_gem_object_set_to_display_plane(struct drm_i915_gem_object *obj, struct intel_ring_buffer *pipelined); int i915_gem_attach_phys_object(struct drm_device *dev, struct drm_i915_gem_object *obj, int id, int align); void i915_gem_detach_phys_object(struct drm_device *dev, struct drm_i915_gem_object *obj); void i915_gem_free_all_phys_object(struct drm_device *dev); void i915_gem_release(struct drm_device *dev, struct drm_file *file); uint32_t i915_gem_get_unfenced_gtt_alignment(struct drm_i915_gem_object *obj); /* i915_gem_gtt.c */ void i915_gem_restore_gtt_mappings(struct drm_device *dev); int __must_check i915_gem_gtt_bind_object(struct drm_i915_gem_object *obj); void i915_gem_gtt_unbind_object(struct drm_i915_gem_object *obj); /* i915_gem_evict.c */ int __must_check i915_gem_evict_something(struct drm_device *dev, int min_size, unsigned alignment, bool mappable); int __must_check i915_gem_evict_everything(struct drm_device *dev, bool purgeable_only); int __must_check i915_gem_evict_inactive(struct drm_device *dev, bool purgeable_only); /* i915_gem_tiling.c */ void i915_gem_detect_bit_6_swizzle(struct drm_device *dev); void i915_gem_object_do_bit_17_swizzle(struct drm_i915_gem_object *obj); void i915_gem_object_save_bit_17_swizzle(struct drm_i915_gem_object *obj); /* i915_gem_debug.c */ void i915_gem_dump_object(struct drm_i915_gem_object *obj, int len, const char *where, uint32_t mark); #if WATCH_LISTS int i915_verify_lists(struct drm_device *dev); #else #define i915_verify_lists(dev) 0 #endif void i915_gem_object_check_coherency(struct drm_i915_gem_object *obj, int handle); void i915_gem_dump_object(struct drm_i915_gem_object *obj, int len, const char *where, uint32_t mark); /* i915_debugfs.c */ int i915_debugfs_init(struct drm_minor *minor); void i915_debugfs_cleanup(struct drm_minor *minor); /* i915_suspend.c */ extern int i915_save_state(struct drm_device *dev); extern int i915_restore_state(struct drm_device *dev); /* i915_suspend.c */ extern int i915_save_state(struct drm_device *dev); extern int i915_restore_state(struct drm_device *dev); /* intel_i2c.c */ extern int intel_setup_gmbus(struct drm_device *dev); extern void intel_teardown_gmbus(struct drm_device *dev); extern void intel_gmbus_set_speed(struct i2c_adapter *adapter, int speed); extern void intel_gmbus_force_bit(struct i2c_adapter *adapter, bool force_bit); extern inline bool intel_gmbus_is_forced_bit(struct i2c_adapter *adapter) { return container_of(adapter, struct intel_gmbus, adapter)->force_bit; } extern void intel_i2c_reset(struct drm_device *dev); /* intel_opregion.c */ extern int intel_opregion_setup(struct drm_device *dev); #ifdef CONFIG_ACPI extern void intel_opregion_init(struct drm_device *dev); extern void intel_opregion_fini(struct drm_device *dev); extern void intel_opregion_asle_intr(struct drm_device *dev); extern void intel_opregion_gse_intr(struct drm_device *dev); extern void intel_opregion_enable_asle(struct drm_device *dev); #else static inline void intel_opregion_init(struct drm_device *dev) { return; } static inline void intel_opregion_fini(struct drm_device *dev) { return; } static inline void intel_opregion_asle_intr(struct drm_device *dev) { return; } static inline void intel_opregion_gse_intr(struct drm_device *dev) { return; } static inline void intel_opregion_enable_asle(struct drm_device *dev) { return; } #endif /* intel_acpi.c */ #ifdef CONFIG_ACPI extern void intel_register_dsm_handler(void); extern void intel_unregister_dsm_handler(void); #else static inline void intel_register_dsm_handler(void) { return; } static inline void intel_unregister_dsm_handler(void) { return; } #endif /* CONFIG_ACPI */ /* modesetting */ extern void intel_modeset_init(struct drm_device *dev); extern void intel_modeset_gem_init(struct drm_device *dev); extern void intel_modeset_cleanup(struct drm_device *dev); extern int intel_modeset_vga_set_state(struct drm_device *dev, bool state); extern void i8xx_disable_fbc(struct drm_device *dev); extern void g4x_disable_fbc(struct drm_device *dev); extern void ironlake_disable_fbc(struct drm_device *dev); extern void intel_disable_fbc(struct drm_device *dev); extern void intel_enable_fbc(struct drm_crtc *crtc, unsigned long interval); extern bool intel_fbc_enabled(struct drm_device *dev); extern bool ironlake_set_drps(struct drm_device *dev, u8 val); extern void ironlake_enable_rc6(struct drm_device *dev); extern void gen6_set_rps(struct drm_device *dev, u8 val); extern void intel_detect_pch (struct drm_device *dev); extern int intel_trans_dp_port_sel (struct drm_crtc *crtc); /* overlay */ #ifdef CONFIG_DEBUG_FS extern struct intel_overlay_error_state *intel_overlay_capture_error_state(struct drm_device *dev); extern void intel_overlay_print_error_state(struct seq_file *m, struct intel_overlay_error_state *error); extern struct intel_display_error_state *intel_display_capture_error_state(struct drm_device *dev); extern void intel_display_print_error_state(struct seq_file *m, struct drm_device *dev, struct intel_display_error_state *error); #endif #define LP_RING(d) (&((struct drm_i915_private *)(d))->ring[RCS]) #define BEGIN_LP_RING(n) \ intel_ring_begin(LP_RING(dev_priv), (n)) #define OUT_RING(x) \ intel_ring_emit(LP_RING(dev_priv), x) #define ADVANCE_LP_RING() \ intel_ring_advance(LP_RING(dev_priv)) /** * Lock test for when it's just for synchronization of ring access. * * In that case, we don't need to do it when GEM is initialized as nobody else * has access to the ring. */ #define RING_LOCK_TEST_WITH_RETURN(dev, file) do { \ if (LP_RING(dev->dev_private)->obj == NULL) \ LOCK_TEST_WITH_RETURN(dev, file); \ } while (0) /* On SNB platform, before reading ring registers forcewake bit * must be set to prevent GT core from power down and stale values being * returned. */ void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv); void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv); void __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv); /* We give fast paths for the really cool registers */ #define NEEDS_FORCE_WAKE(dev_priv, reg) \ (((dev_priv)->info->gen >= 6) && \ ((reg) < 0x40000) && \ ((reg) != FORCEWAKE)) #define __i915_read(x, y) \ static inline u##x i915_read##x(struct drm_i915_private *dev_priv, u32 reg) { \ u##x val = 0; \ if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \ gen6_gt_force_wake_get(dev_priv); \ val = read##y(dev_priv->regs + reg); \ gen6_gt_force_wake_put(dev_priv); \ } else { \ val = read##y(dev_priv->regs + reg); \ } \ trace_i915_reg_rw(false, reg, val, sizeof(val)); \ return val; \ } __i915_read(8, b) __i915_read(16, w) __i915_read(32, l) __i915_read(64, q) #undef __i915_read #define __i915_write(x, y) \ static inline void i915_write##x(struct drm_i915_private *dev_priv, u32 reg, u##x val) { \ trace_i915_reg_rw(true, reg, val, sizeof(val)); \ if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \ __gen6_gt_wait_for_fifo(dev_priv); \ } \ write##y(val, dev_priv->regs + reg); \ } __i915_write(8, b) __i915_write(16, w) __i915_write(32, l) __i915_write(64, q) #undef __i915_write #define I915_READ8(reg) i915_read8(dev_priv, (reg)) #define I915_WRITE8(reg, val) i915_write8(dev_priv, (reg), (val)) #define I915_READ16(reg) i915_read16(dev_priv, (reg)) #define I915_WRITE16(reg, val) i915_write16(dev_priv, (reg), (val)) #define I915_READ16_NOTRACE(reg) readw(dev_priv->regs + (reg)) #define I915_WRITE16_NOTRACE(reg, val) writew(val, dev_priv->regs + (reg)) #define I915_READ(reg) i915_read32(dev_priv, (reg)) #define I915_WRITE(reg, val) i915_write32(dev_priv, (reg), (val)) #define I915_READ_NOTRACE(reg) readl(dev_priv->regs + (reg)) #define I915_WRITE_NOTRACE(reg, val) writel(val, dev_priv->regs + (reg)) #define I915_WRITE64(reg, val) i915_write64(dev_priv, (reg), (val)) #define I915_READ64(reg) i915_read64(dev_priv, (reg)) #define POSTING_READ(reg) (void)I915_READ_NOTRACE(reg) #define POSTING_READ16(reg) (void)I915_READ16_NOTRACE(reg) #endif