#ifndef _INTEL_RINGBUFFER_H_ #define _INTEL_RINGBUFFER_H_ /* * Gen2 BSpec "1. Programming Environment" / 1.4.4.6 "Ring Buffer Use" * Gen3 BSpec "vol1c Memory Interface Functions" / 2.3.4.5 "Ring Buffer Use" * Gen4+ BSpec "vol1c Memory Interface and Command Stream" / 5.3.4.5 "Ring Buffer Use" * * "If the Ring Buffer Head Pointer and the Tail Pointer are on the same * cacheline, the Head Pointer must not be greater than the Tail * Pointer." */ #define I915_RING_FREE_SPACE 64 struct intel_hw_status_page { u32 *page_addr; unsigned int gfx_addr; struct drm_i915_gem_object *obj; }; #define I915_READ_TAIL(ring) I915_READ(RING_TAIL((ring)->mmio_base)) #define I915_WRITE_TAIL(ring, val) I915_WRITE(RING_TAIL((ring)->mmio_base), val) #define I915_READ_START(ring) I915_READ(RING_START((ring)->mmio_base)) #define I915_WRITE_START(ring, val) I915_WRITE(RING_START((ring)->mmio_base), val) #define I915_READ_HEAD(ring) I915_READ(RING_HEAD((ring)->mmio_base)) #define I915_WRITE_HEAD(ring, val) I915_WRITE(RING_HEAD((ring)->mmio_base), val) #define I915_READ_CTL(ring) I915_READ(RING_CTL((ring)->mmio_base)) #define I915_WRITE_CTL(ring, val) I915_WRITE(RING_CTL((ring)->mmio_base), val) #define I915_READ_IMR(ring) I915_READ(RING_IMR((ring)->mmio_base)) #define I915_WRITE_IMR(ring, val) I915_WRITE(RING_IMR((ring)->mmio_base), val) #define I915_READ_NOPID(ring) I915_READ(RING_NOPID((ring)->mmio_base)) #define I915_READ_SYNC_0(ring) I915_READ(RING_SYNC_0((ring)->mmio_base)) #define I915_READ_SYNC_1(ring) I915_READ(RING_SYNC_1((ring)->mmio_base)) struct intel_ring_buffer { const char *name; enum intel_ring_id { RCS = 0x0, VCS, BCS, } id; #define I915_NUM_RINGS 3 u32 mmio_base; void __iomem *virtual_start; struct drm_device *dev; struct drm_i915_gem_object *obj; u32 head; u32 tail; int space; int size; int effective_size; struct intel_hw_status_page status_page; /** We track the position of the requests in the ring buffer, and * when each is retired we increment last_retired_head as the GPU * must have finished processing the request and so we know we * can advance the ringbuffer up to that position. * * last_retired_head is set to -1 after the value is consumed so * we can detect new retirements. */ u32 last_retired_head; u32 irq_refcount; /* protected by dev_priv->irq_lock */ u32 irq_enable_mask; /* bitmask to enable ring interrupt */ u32 trace_irq_seqno; u32 sync_seqno[I915_NUM_RINGS-1]; bool __must_check (*irq_get)(struct intel_ring_buffer *ring); void (*irq_put)(struct intel_ring_buffer *ring); int (*init)(struct intel_ring_buffer *ring); void (*write_tail)(struct intel_ring_buffer *ring, u32 value); int __must_check (*flush)(struct intel_ring_buffer *ring, u32 invalidate_domains, u32 flush_domains); int (*add_request)(struct intel_ring_buffer *ring); /* Some chipsets are not quite as coherent as advertised and need * an expensive kick to force a true read of the up-to-date seqno. * However, the up-to-date seqno is not always required and the last * seen value is good enough. Note that the seqno will always be * monotonic, even if not coherent. */ u32 (*get_seqno)(struct intel_ring_buffer *ring, bool lazy_coherency); void (*set_seqno)(struct intel_ring_buffer *ring, u32 seqno); int (*dispatch_execbuffer)(struct intel_ring_buffer *ring, u32 offset, u32 length, unsigned flags); #define I915_DISPATCH_SECURE 0x1 #define I915_DISPATCH_PINNED 0x2 void (*cleanup)(struct intel_ring_buffer *ring); int (*sync_to)(struct intel_ring_buffer *ring, struct intel_ring_buffer *to, u32 seqno); u32 semaphore_register[3]; /*our mbox written by others */ u32 signal_mbox[2]; /* mboxes this ring signals to */ /** * List of objects currently involved in rendering from the * ringbuffer. * * 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 breadcrumbs associated with GPU requests currently * outstanding. */ struct list_head request_list; /** * Do we have some not yet emitted requests outstanding? */ u32 outstanding_lazy_request; bool gpu_caches_dirty; wait_queue_head_t irq_queue; /** * Do an explicit TLB flush before MI_SET_CONTEXT */ bool itlb_before_ctx_switch; struct i915_hw_context *default_context; struct drm_i915_gem_object *last_context_obj; void *private; }; static inline bool intel_ring_initialized(struct intel_ring_buffer *ring) { return ring->obj != NULL; } static inline unsigned intel_ring_flag(struct intel_ring_buffer *ring) { return 1 << ring->id; } static inline u32 intel_ring_sync_index(struct intel_ring_buffer *ring, struct intel_ring_buffer *other) { int idx; /* * cs -> 0 = vcs, 1 = bcs * vcs -> 0 = bcs, 1 = cs, * bcs -> 0 = cs, 1 = vcs. */ idx = (other - ring) - 1; if (idx < 0) idx += I915_NUM_RINGS; return idx; } static inline u32 intel_read_status_page(struct intel_ring_buffer *ring, int reg) { /* Ensure that the compiler doesn't optimize away the load. */ barrier(); return ring->status_page.page_addr[reg]; } static inline void intel_write_status_page(struct intel_ring_buffer *ring, int reg, u32 value) { ring->status_page.page_addr[reg] = value; } /** * Reads a dword out of the status page, which is written to from the command * queue by automatic updates, MI_REPORT_HEAD, MI_STORE_DATA_INDEX, or * MI_STORE_DATA_IMM. * * The following dwords have a reserved meaning: * 0x00: ISR copy, updated when an ISR bit not set in the HWSTAM changes. * 0x04: ring 0 head pointer * 0x05: ring 1 head pointer (915-class) * 0x06: ring 2 head pointer (915-class) * 0x10-0x1b: Context status DWords (GM45) * 0x1f: Last written status offset. (GM45) * * The area from dword 0x20 to 0x3ff is available for driver usage. */ #define I915_GEM_HWS_INDEX 0x20 #define I915_GEM_HWS_SCRATCH_INDEX 0x30 #define I915_GEM_HWS_SCRATCH_ADDR (I915_GEM_HWS_SCRATCH_INDEX << MI_STORE_DWORD_INDEX_SHIFT) void intel_cleanup_ring_buffer(struct intel_ring_buffer *ring); int __must_check intel_ring_begin(struct intel_ring_buffer *ring, int n); static inline void intel_ring_emit(struct intel_ring_buffer *ring, u32 data) { iowrite32(data, ring->virtual_start + ring->tail); ring->tail += 4; } void intel_ring_advance(struct intel_ring_buffer *ring); int __must_check intel_ring_idle(struct intel_ring_buffer *ring); void intel_ring_init_seqno(struct intel_ring_buffer *ring, u32 seqno); int intel_ring_flush_all_caches(struct intel_ring_buffer *ring); int intel_ring_invalidate_all_caches(struct intel_ring_buffer *ring); int intel_init_render_ring_buffer(struct drm_device *dev); int intel_init_bsd_ring_buffer(struct drm_device *dev); int intel_init_blt_ring_buffer(struct drm_device *dev); u32 intel_ring_get_active_head(struct intel_ring_buffer *ring); void intel_ring_setup_status_page(struct intel_ring_buffer *ring); static inline u32 intel_ring_get_tail(struct intel_ring_buffer *ring) { return ring->tail; } static inline u32 intel_ring_get_seqno(struct intel_ring_buffer *ring) { BUG_ON(ring->outstanding_lazy_request == 0); return ring->outstanding_lazy_request; } static inline void i915_trace_irq_get(struct intel_ring_buffer *ring, u32 seqno) { if (ring->trace_irq_seqno == 0 && ring->irq_get(ring)) ring->trace_irq_seqno = seqno; } /* DRI warts */ int intel_render_ring_init_dri(struct drm_device *dev, u64 start, u32 size); #endif /* _INTEL_RINGBUFFER_H_ */