]> Pileus Git - ~andy/linux/blob - drivers/gpu/drm/i915/intel_ringbuffer.h
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
[~andy/linux] / drivers / gpu / drm / i915 / intel_ringbuffer.h
1 #ifndef _INTEL_RINGBUFFER_H_
2 #define _INTEL_RINGBUFFER_H_
3
4 /*
5  * Gen2 BSpec "1. Programming Environment" / 1.4.4.6 "Ring Buffer Use"
6  * Gen3 BSpec "vol1c Memory Interface Functions" / 2.3.4.5 "Ring Buffer Use"
7  * Gen4+ BSpec "vol1c Memory Interface and Command Stream" / 5.3.4.5 "Ring Buffer Use"
8  *
9  * "If the Ring Buffer Head Pointer and the Tail Pointer are on the same
10  * cacheline, the Head Pointer must not be greater than the Tail
11  * Pointer."
12  */
13 #define I915_RING_FREE_SPACE 64
14
15 struct  intel_hw_status_page {
16         u32             *page_addr;
17         unsigned int    gfx_addr;
18         struct          drm_i915_gem_object *obj;
19 };
20
21 #define I915_READ_TAIL(ring) I915_READ(RING_TAIL((ring)->mmio_base))
22 #define I915_WRITE_TAIL(ring, val) I915_WRITE(RING_TAIL((ring)->mmio_base), val)
23
24 #define I915_READ_START(ring) I915_READ(RING_START((ring)->mmio_base))
25 #define I915_WRITE_START(ring, val) I915_WRITE(RING_START((ring)->mmio_base), val)
26
27 #define I915_READ_HEAD(ring)  I915_READ(RING_HEAD((ring)->mmio_base))
28 #define I915_WRITE_HEAD(ring, val) I915_WRITE(RING_HEAD((ring)->mmio_base), val)
29
30 #define I915_READ_CTL(ring) I915_READ(RING_CTL((ring)->mmio_base))
31 #define I915_WRITE_CTL(ring, val) I915_WRITE(RING_CTL((ring)->mmio_base), val)
32
33 #define I915_READ_IMR(ring) I915_READ(RING_IMR((ring)->mmio_base))
34 #define I915_WRITE_IMR(ring, val) I915_WRITE(RING_IMR((ring)->mmio_base), val)
35
36 #define I915_READ_NOPID(ring) I915_READ(RING_NOPID((ring)->mmio_base))
37 #define I915_READ_SYNC_0(ring) I915_READ(RING_SYNC_0((ring)->mmio_base))
38 #define I915_READ_SYNC_1(ring) I915_READ(RING_SYNC_1((ring)->mmio_base))
39
40 enum intel_ring_hangcheck_action { wait, active, kick, hung };
41
42 struct intel_ring_hangcheck {
43         bool deadlock;
44         u32 seqno;
45         u32 acthd;
46         int score;
47         enum intel_ring_hangcheck_action action;
48 };
49
50 struct  intel_ring_buffer {
51         const char      *name;
52         enum intel_ring_id {
53                 RCS = 0x0,
54                 VCS,
55                 BCS,
56                 VECS,
57         } id;
58 #define I915_NUM_RINGS 4
59         u32             mmio_base;
60         void            __iomem *virtual_start;
61         struct          drm_device *dev;
62         struct          drm_i915_gem_object *obj;
63
64         u32             head;
65         u32             tail;
66         int             space;
67         int             size;
68         int             effective_size;
69         struct intel_hw_status_page status_page;
70
71         /** We track the position of the requests in the ring buffer, and
72          * when each is retired we increment last_retired_head as the GPU
73          * must have finished processing the request and so we know we
74          * can advance the ringbuffer up to that position.
75          *
76          * last_retired_head is set to -1 after the value is consumed so
77          * we can detect new retirements.
78          */
79         u32             last_retired_head;
80
81         struct {
82                 u32     gt; /*  protected by dev_priv->irq_lock */
83                 u32     pm; /*  protected by dev_priv->rps.lock (sucks) */
84         } irq_refcount;
85         u32             irq_enable_mask;        /* bitmask to enable ring interrupt */
86         u32             trace_irq_seqno;
87         u32             sync_seqno[I915_NUM_RINGS-1];
88         bool __must_check (*irq_get)(struct intel_ring_buffer *ring);
89         void            (*irq_put)(struct intel_ring_buffer *ring);
90
91         int             (*init)(struct intel_ring_buffer *ring);
92
93         void            (*write_tail)(struct intel_ring_buffer *ring,
94                                       u32 value);
95         int __must_check (*flush)(struct intel_ring_buffer *ring,
96                                   u32   invalidate_domains,
97                                   u32   flush_domains);
98         int             (*add_request)(struct intel_ring_buffer *ring);
99         /* Some chipsets are not quite as coherent as advertised and need
100          * an expensive kick to force a true read of the up-to-date seqno.
101          * However, the up-to-date seqno is not always required and the last
102          * seen value is good enough. Note that the seqno will always be
103          * monotonic, even if not coherent.
104          */
105         u32             (*get_seqno)(struct intel_ring_buffer *ring,
106                                      bool lazy_coherency);
107         void            (*set_seqno)(struct intel_ring_buffer *ring,
108                                      u32 seqno);
109         int             (*dispatch_execbuffer)(struct intel_ring_buffer *ring,
110                                                u32 offset, u32 length,
111                                                unsigned flags);
112 #define I915_DISPATCH_SECURE 0x1
113 #define I915_DISPATCH_PINNED 0x2
114         void            (*cleanup)(struct intel_ring_buffer *ring);
115         int             (*sync_to)(struct intel_ring_buffer *ring,
116                                    struct intel_ring_buffer *to,
117                                    u32 seqno);
118
119         /* our mbox written by others */
120         u32             semaphore_register[I915_NUM_RINGS];
121         /* mboxes this ring signals to */
122         u32             signal_mbox[I915_NUM_RINGS];
123
124         /**
125          * List of objects currently involved in rendering from the
126          * ringbuffer.
127          *
128          * Includes buffers having the contents of their GPU caches
129          * flushed, not necessarily primitives.  last_rendering_seqno
130          * represents when the rendering involved will be completed.
131          *
132          * A reference is held on the buffer while on this list.
133          */
134         struct list_head active_list;
135
136         /**
137          * List of breadcrumbs associated with GPU requests currently
138          * outstanding.
139          */
140         struct list_head request_list;
141
142         /**
143          * Do we have some not yet emitted requests outstanding?
144          */
145         u32 outstanding_lazy_request;
146         bool gpu_caches_dirty;
147         bool fbc_dirty;
148
149         wait_queue_head_t irq_queue;
150
151         /**
152          * Do an explicit TLB flush before MI_SET_CONTEXT
153          */
154         bool itlb_before_ctx_switch;
155         struct i915_hw_context *default_context;
156         struct i915_hw_context *last_context;
157
158         struct intel_ring_hangcheck hangcheck;
159
160         void *private;
161 };
162
163 static inline bool
164 intel_ring_initialized(struct intel_ring_buffer *ring)
165 {
166         return ring->obj != NULL;
167 }
168
169 static inline unsigned
170 intel_ring_flag(struct intel_ring_buffer *ring)
171 {
172         return 1 << ring->id;
173 }
174
175 static inline u32
176 intel_ring_sync_index(struct intel_ring_buffer *ring,
177                       struct intel_ring_buffer *other)
178 {
179         int idx;
180
181         /*
182          * cs -> 0 = vcs, 1 = bcs
183          * vcs -> 0 = bcs, 1 = cs,
184          * bcs -> 0 = cs, 1 = vcs.
185          */
186
187         idx = (other - ring) - 1;
188         if (idx < 0)
189                 idx += I915_NUM_RINGS;
190
191         return idx;
192 }
193
194 static inline u32
195 intel_read_status_page(struct intel_ring_buffer *ring,
196                        int reg)
197 {
198         /* Ensure that the compiler doesn't optimize away the load. */
199         barrier();
200         return ring->status_page.page_addr[reg];
201 }
202
203 static inline void
204 intel_write_status_page(struct intel_ring_buffer *ring,
205                         int reg, u32 value)
206 {
207         ring->status_page.page_addr[reg] = value;
208 }
209
210 /**
211  * Reads a dword out of the status page, which is written to from the command
212  * queue by automatic updates, MI_REPORT_HEAD, MI_STORE_DATA_INDEX, or
213  * MI_STORE_DATA_IMM.
214  *
215  * The following dwords have a reserved meaning:
216  * 0x00: ISR copy, updated when an ISR bit not set in the HWSTAM changes.
217  * 0x04: ring 0 head pointer
218  * 0x05: ring 1 head pointer (915-class)
219  * 0x06: ring 2 head pointer (915-class)
220  * 0x10-0x1b: Context status DWords (GM45)
221  * 0x1f: Last written status offset. (GM45)
222  *
223  * The area from dword 0x20 to 0x3ff is available for driver usage.
224  */
225 #define I915_GEM_HWS_INDEX              0x20
226 #define I915_GEM_HWS_SCRATCH_INDEX      0x30
227 #define I915_GEM_HWS_SCRATCH_ADDR (I915_GEM_HWS_SCRATCH_INDEX << MI_STORE_DWORD_INDEX_SHIFT)
228
229 void intel_cleanup_ring_buffer(struct intel_ring_buffer *ring);
230
231 int __must_check intel_ring_begin(struct intel_ring_buffer *ring, int n);
232 static inline void intel_ring_emit(struct intel_ring_buffer *ring,
233                                    u32 data)
234 {
235         iowrite32(data, ring->virtual_start + ring->tail);
236         ring->tail += 4;
237 }
238 void intel_ring_advance(struct intel_ring_buffer *ring);
239 int __must_check intel_ring_idle(struct intel_ring_buffer *ring);
240 void intel_ring_init_seqno(struct intel_ring_buffer *ring, u32 seqno);
241 int intel_ring_flush_all_caches(struct intel_ring_buffer *ring);
242 int intel_ring_invalidate_all_caches(struct intel_ring_buffer *ring);
243
244 int intel_init_render_ring_buffer(struct drm_device *dev);
245 int intel_init_bsd_ring_buffer(struct drm_device *dev);
246 int intel_init_blt_ring_buffer(struct drm_device *dev);
247 int intel_init_vebox_ring_buffer(struct drm_device *dev);
248
249 u32 intel_ring_get_active_head(struct intel_ring_buffer *ring);
250 void intel_ring_setup_status_page(struct intel_ring_buffer *ring);
251
252 static inline u32 intel_ring_get_tail(struct intel_ring_buffer *ring)
253 {
254         return ring->tail;
255 }
256
257 static inline u32 intel_ring_get_seqno(struct intel_ring_buffer *ring)
258 {
259         BUG_ON(ring->outstanding_lazy_request == 0);
260         return ring->outstanding_lazy_request;
261 }
262
263 static inline void i915_trace_irq_get(struct intel_ring_buffer *ring, u32 seqno)
264 {
265         if (ring->trace_irq_seqno == 0 && ring->irq_get(ring))
266                 ring->trace_irq_seqno = seqno;
267 }
268
269 /* DRI warts */
270 int intel_render_ring_init_dri(struct drm_device *dev, u64 start, u32 size);
271
272 #endif /* _INTEL_RINGBUFFER_H_ */