Linux kernel mirror (for testing)
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linux
1#ifndef _INTEL_RINGBUFFER_H_
2#define _INTEL_RINGBUFFER_H_
3
4enum {
5 RCS = 0x0,
6 VCS,
7 BCS,
8 I915_NUM_RINGS,
9};
10
11struct intel_hw_status_page {
12 u32 __iomem *page_addr;
13 unsigned int gfx_addr;
14 struct drm_i915_gem_object *obj;
15};
16
17#define I915_READ_TAIL(ring) I915_READ(RING_TAIL((ring)->mmio_base))
18#define I915_WRITE_TAIL(ring, val) I915_WRITE(RING_TAIL((ring)->mmio_base), val)
19
20#define I915_READ_START(ring) I915_READ(RING_START((ring)->mmio_base))
21#define I915_WRITE_START(ring, val) I915_WRITE(RING_START((ring)->mmio_base), val)
22
23#define I915_READ_HEAD(ring) I915_READ(RING_HEAD((ring)->mmio_base))
24#define I915_WRITE_HEAD(ring, val) I915_WRITE(RING_HEAD((ring)->mmio_base), val)
25
26#define I915_READ_CTL(ring) I915_READ(RING_CTL((ring)->mmio_base))
27#define I915_WRITE_CTL(ring, val) I915_WRITE(RING_CTL((ring)->mmio_base), val)
28
29#define I915_READ_IMR(ring) I915_READ(RING_IMR((ring)->mmio_base))
30#define I915_WRITE_IMR(ring, val) I915_WRITE(RING_IMR((ring)->mmio_base), val)
31
32#define I915_READ_NOPID(ring) I915_READ(RING_NOPID((ring)->mmio_base))
33#define I915_READ_SYNC_0(ring) I915_READ(RING_SYNC_0((ring)->mmio_base))
34#define I915_READ_SYNC_1(ring) I915_READ(RING_SYNC_1((ring)->mmio_base))
35
36struct intel_ring_buffer {
37 const char *name;
38 enum intel_ring_id {
39 RING_RENDER = 0x1,
40 RING_BSD = 0x2,
41 RING_BLT = 0x4,
42 } id;
43 u32 mmio_base;
44 void __iomem *virtual_start;
45 struct drm_device *dev;
46 struct drm_i915_gem_object *obj;
47
48 u32 head;
49 u32 tail;
50 int space;
51 int size;
52 int effective_size;
53 struct intel_hw_status_page status_page;
54
55 spinlock_t irq_lock;
56 u32 irq_refcount;
57 u32 irq_mask;
58 u32 irq_seqno; /* last seq seem at irq time */
59 u32 trace_irq_seqno;
60 u32 waiting_seqno;
61 u32 sync_seqno[I915_NUM_RINGS-1];
62 bool __must_check (*irq_get)(struct intel_ring_buffer *ring);
63 void (*irq_put)(struct intel_ring_buffer *ring);
64
65 int (*init)(struct intel_ring_buffer *ring);
66
67 void (*write_tail)(struct intel_ring_buffer *ring,
68 u32 value);
69 int __must_check (*flush)(struct intel_ring_buffer *ring,
70 u32 invalidate_domains,
71 u32 flush_domains);
72 int (*add_request)(struct intel_ring_buffer *ring,
73 u32 *seqno);
74 u32 (*get_seqno)(struct intel_ring_buffer *ring);
75 int (*dispatch_execbuffer)(struct intel_ring_buffer *ring,
76 u32 offset, u32 length);
77 void (*cleanup)(struct intel_ring_buffer *ring);
78 int (*sync_to)(struct intel_ring_buffer *ring,
79 struct intel_ring_buffer *to,
80 u32 seqno);
81
82 u32 semaphore_register[3]; /*our mbox written by others */
83 u32 signal_mbox[2]; /* mboxes this ring signals to */
84 /**
85 * List of objects currently involved in rendering from the
86 * ringbuffer.
87 *
88 * Includes buffers having the contents of their GPU caches
89 * flushed, not necessarily primitives. last_rendering_seqno
90 * represents when the rendering involved will be completed.
91 *
92 * A reference is held on the buffer while on this list.
93 */
94 struct list_head active_list;
95
96 /**
97 * List of breadcrumbs associated with GPU requests currently
98 * outstanding.
99 */
100 struct list_head request_list;
101
102 /**
103 * List of objects currently pending a GPU write flush.
104 *
105 * All elements on this list will belong to either the
106 * active_list or flushing_list, last_rendering_seqno can
107 * be used to differentiate between the two elements.
108 */
109 struct list_head gpu_write_list;
110
111 /**
112 * Do we have some not yet emitted requests outstanding?
113 */
114 u32 outstanding_lazy_request;
115
116 wait_queue_head_t irq_queue;
117 drm_local_map_t map;
118
119 void *private;
120};
121
122static inline u32
123intel_ring_sync_index(struct intel_ring_buffer *ring,
124 struct intel_ring_buffer *other)
125{
126 int idx;
127
128 /*
129 * cs -> 0 = vcs, 1 = bcs
130 * vcs -> 0 = bcs, 1 = cs,
131 * bcs -> 0 = cs, 1 = vcs.
132 */
133
134 idx = (other - ring) - 1;
135 if (idx < 0)
136 idx += I915_NUM_RINGS;
137
138 return idx;
139}
140
141static inline u32
142intel_read_status_page(struct intel_ring_buffer *ring,
143 int reg)
144{
145 return ioread32(ring->status_page.page_addr + reg);
146}
147
148/**
149 * Reads a dword out of the status page, which is written to from the command
150 * queue by automatic updates, MI_REPORT_HEAD, MI_STORE_DATA_INDEX, or
151 * MI_STORE_DATA_IMM.
152 *
153 * The following dwords have a reserved meaning:
154 * 0x00: ISR copy, updated when an ISR bit not set in the HWSTAM changes.
155 * 0x04: ring 0 head pointer
156 * 0x05: ring 1 head pointer (915-class)
157 * 0x06: ring 2 head pointer (915-class)
158 * 0x10-0x1b: Context status DWords (GM45)
159 * 0x1f: Last written status offset. (GM45)
160 *
161 * The area from dword 0x20 to 0x3ff is available for driver usage.
162 */
163#define READ_HWSP(dev_priv, reg) intel_read_status_page(LP_RING(dev_priv), reg)
164#define READ_BREADCRUMB(dev_priv) READ_HWSP(dev_priv, I915_BREADCRUMB_INDEX)
165#define I915_GEM_HWS_INDEX 0x20
166#define I915_BREADCRUMB_INDEX 0x21
167
168void intel_cleanup_ring_buffer(struct intel_ring_buffer *ring);
169
170int __must_check intel_wait_ring_buffer(struct intel_ring_buffer *ring, int n);
171static inline int intel_wait_ring_idle(struct intel_ring_buffer *ring)
172{
173 return intel_wait_ring_buffer(ring, ring->size - 8);
174}
175
176int __must_check intel_ring_begin(struct intel_ring_buffer *ring, int n);
177
178static inline void intel_ring_emit(struct intel_ring_buffer *ring,
179 u32 data)
180{
181 iowrite32(data, ring->virtual_start + ring->tail);
182 ring->tail += 4;
183}
184
185void intel_ring_advance(struct intel_ring_buffer *ring);
186
187u32 intel_ring_get_seqno(struct intel_ring_buffer *ring);
188
189int intel_init_render_ring_buffer(struct drm_device *dev);
190int intel_init_bsd_ring_buffer(struct drm_device *dev);
191int intel_init_blt_ring_buffer(struct drm_device *dev);
192
193u32 intel_ring_get_active_head(struct intel_ring_buffer *ring);
194void intel_ring_setup_status_page(struct intel_ring_buffer *ring);
195
196static inline void i915_trace_irq_get(struct intel_ring_buffer *ring, u32 seqno)
197{
198 if (ring->trace_irq_seqno == 0 && ring->irq_get(ring))
199 ring->trace_irq_seqno = seqno;
200}
201
202/* DRI warts */
203int intel_render_ring_init_dri(struct drm_device *dev, u64 start, u32 size);
204
205#endif /* _INTEL_RINGBUFFER_H_ */