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Rev | Author | Line No. | Line |
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2326 | Serge | 1 | #ifndef _INTEL_RINGBUFFER_H_ |
2 | #define _INTEL_RINGBUFFER_H_ |
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3 | |||
3243 | Serge | 4 | /* |
5 | * Gen2 BSpec "1. Programming Environment" / 1.4.4.6 "Ring Buffer Use" |
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6 | * Gen3 BSpec "vol1c Memory Interface Functions" / 2.3.4.5 "Ring Buffer Use" |
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7 | * Gen4+ BSpec "vol1c Memory Interface and Command Stream" / 5.3.4.5 "Ring Buffer Use" |
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8 | * |
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9 | * "If the Ring Buffer Head Pointer and the Tail Pointer are on the same |
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10 | * cacheline, the Head Pointer must not be greater than the Tail |
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11 | * Pointer." |
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12 | */ |
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13 | #define I915_RING_FREE_SPACE 64 |
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14 | |||
2326 | Serge | 15 | struct intel_hw_status_page { |
3031 | serge | 16 | u32 *page_addr; |
2326 | Serge | 17 | unsigned int gfx_addr; |
18 | struct drm_i915_gem_object *obj; |
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19 | }; |
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20 | |||
21 | #define I915_READ_TAIL(ring) I915_READ(RING_TAIL((ring)->mmio_base)) |
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22 | #define I915_WRITE_TAIL(ring, val) I915_WRITE(RING_TAIL((ring)->mmio_base), val) |
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23 | |||
24 | #define I915_READ_START(ring) I915_READ(RING_START((ring)->mmio_base)) |
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25 | #define I915_WRITE_START(ring, val) I915_WRITE(RING_START((ring)->mmio_base), val) |
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26 | |||
27 | #define I915_READ_HEAD(ring) I915_READ(RING_HEAD((ring)->mmio_base)) |
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28 | #define I915_WRITE_HEAD(ring, val) I915_WRITE(RING_HEAD((ring)->mmio_base), val) |
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29 | |||
30 | #define I915_READ_CTL(ring) I915_READ(RING_CTL((ring)->mmio_base)) |
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31 | #define I915_WRITE_CTL(ring, val) I915_WRITE(RING_CTL((ring)->mmio_base), val) |
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32 | |||
33 | #define I915_READ_IMR(ring) I915_READ(RING_IMR((ring)->mmio_base)) |
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34 | #define I915_WRITE_IMR(ring, val) I915_WRITE(RING_IMR((ring)->mmio_base), val) |
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35 | |||
4104 | Serge | 36 | enum intel_ring_hangcheck_action { |
37 | HANGCHECK_WAIT, |
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38 | HANGCHECK_ACTIVE, |
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39 | HANGCHECK_KICK, |
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40 | HANGCHECK_HUNG, |
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41 | }; |
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2326 | Serge | 42 | |
4104 | Serge | 43 | struct intel_ring_hangcheck { |
44 | bool deadlock; |
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45 | u32 seqno; |
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46 | u32 acthd; |
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47 | int score; |
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48 | enum intel_ring_hangcheck_action action; |
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49 | }; |
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50 | |||
2326 | Serge | 51 | struct intel_ring_buffer { |
52 | const char *name; |
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53 | enum intel_ring_id { |
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3031 | serge | 54 | RCS = 0x0, |
55 | VCS, |
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56 | BCS, |
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4104 | Serge | 57 | VECS, |
2326 | Serge | 58 | } id; |
4104 | Serge | 59 | #define I915_NUM_RINGS 4 |
2326 | Serge | 60 | u32 mmio_base; |
61 | void __iomem *virtual_start; |
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62 | struct drm_device *dev; |
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63 | struct drm_i915_gem_object *obj; |
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64 | |||
65 | u32 head; |
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66 | u32 tail; |
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67 | int space; |
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68 | int size; |
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69 | int effective_size; |
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70 | struct intel_hw_status_page status_page; |
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71 | |||
3031 | serge | 72 | /** We track the position of the requests in the ring buffer, and |
73 | * when each is retired we increment last_retired_head as the GPU |
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74 | * must have finished processing the request and so we know we |
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75 | * can advance the ringbuffer up to that position. |
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76 | * |
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77 | * last_retired_head is set to -1 after the value is consumed so |
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78 | * we can detect new retirements. |
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79 | */ |
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80 | u32 last_retired_head; |
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81 | |||
4104 | Serge | 82 | unsigned irq_refcount; /* protected by dev_priv->irq_lock */ |
3031 | serge | 83 | u32 irq_enable_mask; /* bitmask to enable ring interrupt */ |
2326 | Serge | 84 | u32 trace_irq_seqno; |
85 | u32 sync_seqno[I915_NUM_RINGS-1]; |
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86 | bool __must_check (*irq_get)(struct intel_ring_buffer *ring); |
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87 | void (*irq_put)(struct intel_ring_buffer *ring); |
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88 | |||
89 | int (*init)(struct intel_ring_buffer *ring); |
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90 | |||
91 | void (*write_tail)(struct intel_ring_buffer *ring, |
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92 | u32 value); |
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93 | int __must_check (*flush)(struct intel_ring_buffer *ring, |
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94 | u32 invalidate_domains, |
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95 | u32 flush_domains); |
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3243 | Serge | 96 | int (*add_request)(struct intel_ring_buffer *ring); |
3031 | serge | 97 | /* Some chipsets are not quite as coherent as advertised and need |
98 | * an expensive kick to force a true read of the up-to-date seqno. |
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99 | * However, the up-to-date seqno is not always required and the last |
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100 | * seen value is good enough. Note that the seqno will always be |
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101 | * monotonic, even if not coherent. |
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102 | */ |
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103 | u32 (*get_seqno)(struct intel_ring_buffer *ring, |
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104 | bool lazy_coherency); |
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3480 | Serge | 105 | void (*set_seqno)(struct intel_ring_buffer *ring, |
106 | u32 seqno); |
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2326 | Serge | 107 | int (*dispatch_execbuffer)(struct intel_ring_buffer *ring, |
3243 | Serge | 108 | u32 offset, u32 length, |
109 | unsigned flags); |
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110 | #define I915_DISPATCH_SECURE 0x1 |
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111 | #define I915_DISPATCH_PINNED 0x2 |
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2326 | Serge | 112 | void (*cleanup)(struct intel_ring_buffer *ring); |
2342 | Serge | 113 | int (*sync_to)(struct intel_ring_buffer *ring, |
114 | struct intel_ring_buffer *to, |
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115 | u32 seqno); |
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2326 | Serge | 116 | |
4104 | Serge | 117 | /* our mbox written by others */ |
118 | u32 semaphore_register[I915_NUM_RINGS]; |
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119 | /* mboxes this ring signals to */ |
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120 | u32 signal_mbox[I915_NUM_RINGS]; |
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121 | |||
2326 | Serge | 122 | /** |
123 | * List of objects currently involved in rendering from the |
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124 | * ringbuffer. |
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125 | * |
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126 | * Includes buffers having the contents of their GPU caches |
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127 | * flushed, not necessarily primitives. last_rendering_seqno |
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128 | * represents when the rendering involved will be completed. |
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129 | * |
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130 | * A reference is held on the buffer while on this list. |
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131 | */ |
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132 | struct list_head active_list; |
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133 | |||
134 | /** |
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135 | * List of breadcrumbs associated with GPU requests currently |
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136 | * outstanding. |
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137 | */ |
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138 | struct list_head request_list; |
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139 | |||
140 | /** |
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141 | * Do we have some not yet emitted requests outstanding? |
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142 | */ |
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143 | u32 outstanding_lazy_request; |
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3031 | serge | 144 | bool gpu_caches_dirty; |
4104 | Serge | 145 | bool fbc_dirty; |
2326 | Serge | 146 | |
2352 | Serge | 147 | wait_queue_head_t irq_queue; |
2326 | Serge | 148 | |
3031 | serge | 149 | /** |
150 | * Do an explicit TLB flush before MI_SET_CONTEXT |
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151 | */ |
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152 | bool itlb_before_ctx_switch; |
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153 | struct i915_hw_context *default_context; |
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4104 | Serge | 154 | struct i915_hw_context *last_context; |
3031 | serge | 155 | |
4104 | Serge | 156 | struct intel_ring_hangcheck hangcheck; |
157 | |||
158 | struct { |
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159 | struct drm_i915_gem_object *obj; |
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160 | u32 gtt_offset; |
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161 | volatile u32 *cpu_page; |
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162 | } scratch; |
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2326 | Serge | 163 | }; |
164 | |||
3031 | serge | 165 | static inline bool |
166 | intel_ring_initialized(struct intel_ring_buffer *ring) |
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167 | { |
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168 | return ring->obj != NULL; |
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169 | } |
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170 | |||
171 | static inline unsigned |
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172 | intel_ring_flag(struct intel_ring_buffer *ring) |
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173 | { |
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174 | return 1 << ring->id; |
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175 | } |
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176 | |||
2326 | Serge | 177 | static inline u32 |
178 | intel_ring_sync_index(struct intel_ring_buffer *ring, |
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179 | struct intel_ring_buffer *other) |
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180 | { |
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181 | int idx; |
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182 | |||
183 | /* |
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184 | * cs -> 0 = vcs, 1 = bcs |
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185 | * vcs -> 0 = bcs, 1 = cs, |
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186 | * bcs -> 0 = cs, 1 = vcs. |
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187 | */ |
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188 | |||
189 | idx = (other - ring) - 1; |
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190 | if (idx < 0) |
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191 | idx += I915_NUM_RINGS; |
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192 | |||
193 | return idx; |
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194 | } |
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195 | |||
196 | static inline u32 |
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197 | intel_read_status_page(struct intel_ring_buffer *ring, |
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198 | int reg) |
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199 | { |
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3031 | serge | 200 | /* Ensure that the compiler doesn't optimize away the load. */ |
201 | barrier(); |
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202 | return ring->status_page.page_addr[reg]; |
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2326 | Serge | 203 | } |
204 | |||
3480 | Serge | 205 | static inline void |
206 | intel_write_status_page(struct intel_ring_buffer *ring, |
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207 | int reg, u32 value) |
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208 | { |
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209 | ring->status_page.page_addr[reg] = value; |
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210 | } |
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211 | |||
2326 | Serge | 212 | /** |
213 | * Reads a dword out of the status page, which is written to from the command |
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214 | * queue by automatic updates, MI_REPORT_HEAD, MI_STORE_DATA_INDEX, or |
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215 | * MI_STORE_DATA_IMM. |
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216 | * |
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217 | * The following dwords have a reserved meaning: |
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218 | * 0x00: ISR copy, updated when an ISR bit not set in the HWSTAM changes. |
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219 | * 0x04: ring 0 head pointer |
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220 | * 0x05: ring 1 head pointer (915-class) |
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221 | * 0x06: ring 2 head pointer (915-class) |
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222 | * 0x10-0x1b: Context status DWords (GM45) |
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223 | * 0x1f: Last written status offset. (GM45) |
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224 | * |
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225 | * The area from dword 0x20 to 0x3ff is available for driver usage. |
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226 | */ |
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227 | #define I915_GEM_HWS_INDEX 0x20 |
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3243 | Serge | 228 | #define I915_GEM_HWS_SCRATCH_INDEX 0x30 |
229 | #define I915_GEM_HWS_SCRATCH_ADDR (I915_GEM_HWS_SCRATCH_INDEX << MI_STORE_DWORD_INDEX_SHIFT) |
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2326 | Serge | 230 | |
231 | void intel_cleanup_ring_buffer(struct intel_ring_buffer *ring); |
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232 | |||
233 | int __must_check intel_ring_begin(struct intel_ring_buffer *ring, int n); |
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234 | static inline void intel_ring_emit(struct intel_ring_buffer *ring, |
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235 | u32 data) |
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236 | { |
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237 | iowrite32(data, ring->virtual_start + ring->tail); |
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238 | ring->tail += 4; |
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239 | } |
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240 | void intel_ring_advance(struct intel_ring_buffer *ring); |
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3243 | Serge | 241 | int __must_check intel_ring_idle(struct intel_ring_buffer *ring); |
3480 | Serge | 242 | void intel_ring_init_seqno(struct intel_ring_buffer *ring, u32 seqno); |
3031 | serge | 243 | int intel_ring_flush_all_caches(struct intel_ring_buffer *ring); |
244 | int intel_ring_invalidate_all_caches(struct intel_ring_buffer *ring); |
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2326 | Serge | 245 | |
246 | int intel_init_render_ring_buffer(struct drm_device *dev); |
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247 | int intel_init_bsd_ring_buffer(struct drm_device *dev); |
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248 | int intel_init_blt_ring_buffer(struct drm_device *dev); |
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4104 | Serge | 249 | int intel_init_vebox_ring_buffer(struct drm_device *dev); |
2326 | Serge | 250 | |
251 | u32 intel_ring_get_active_head(struct intel_ring_buffer *ring); |
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252 | void intel_ring_setup_status_page(struct intel_ring_buffer *ring); |
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253 | |||
3031 | serge | 254 | static inline u32 intel_ring_get_tail(struct intel_ring_buffer *ring) |
255 | { |
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256 | return ring->tail; |
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257 | } |
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258 | |||
3243 | Serge | 259 | static inline u32 intel_ring_get_seqno(struct intel_ring_buffer *ring) |
260 | { |
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261 | BUG_ON(ring->outstanding_lazy_request == 0); |
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262 | return ring->outstanding_lazy_request; |
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263 | } |
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264 | |||
2326 | Serge | 265 | static inline void i915_trace_irq_get(struct intel_ring_buffer *ring, u32 seqno) |
266 | { |
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267 | if (ring->trace_irq_seqno == 0 && ring->irq_get(ring)) |
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268 | ring->trace_irq_seqno = seqno; |
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269 | } |
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270 | |||
271 | /* DRI warts */ |
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272 | int intel_render_ring_init_dri(struct drm_device *dev, u64 start, u32 size); |
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273 | |||
274 | #endif /* _INTEL_RINGBUFFER_H_ */><>>><> |