2 * Copyright © 2014 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
27 #include "intel_ringbuffer.h"
29 #define GEN8_LR_CONTEXT_ALIGN 4096
32 #define RING_ELSP(ring) _MMIO((ring)->mmio_base + 0x230)
33 #define RING_EXECLIST_STATUS_LO(ring) _MMIO((ring)->mmio_base + 0x234)
34 #define RING_EXECLIST_STATUS_HI(ring) _MMIO((ring)->mmio_base + 0x234 + 4)
35 #define RING_CONTEXT_CONTROL(ring) _MMIO((ring)->mmio_base + 0x244)
36 #define CTX_CTRL_INHIBIT_SYN_CTX_SWITCH (1 << 3)
37 #define CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT (1 << 0)
38 #define CTX_CTRL_RS_CTX_ENABLE (1 << 1)
39 #define RING_CONTEXT_STATUS_BUF_BASE(ring) _MMIO((ring)->mmio_base + 0x370)
40 #define RING_CONTEXT_STATUS_BUF_LO(ring, i) _MMIO((ring)->mmio_base + 0x370 + (i) * 8)
41 #define RING_CONTEXT_STATUS_BUF_HI(ring, i) _MMIO((ring)->mmio_base + 0x370 + (i) * 8 + 4)
42 #define RING_CONTEXT_STATUS_PTR(ring) _MMIO((ring)->mmio_base + 0x3a0)
44 /* The docs specify that the write pointer wraps around after 5h, "After status
45 * is written out to the last available status QW at offset 5h, this pointer
48 * Therefore, one must infer than even though there are 3 bits available, 6 and
49 * 7 appear to be * reserved.
51 #define GEN8_CSB_ENTRIES 6
52 #define GEN8_CSB_PTR_MASK 0x7
53 #define GEN8_CSB_READ_PTR_MASK (GEN8_CSB_PTR_MASK << 8)
54 #define GEN8_CSB_WRITE_PTR_MASK (GEN8_CSB_PTR_MASK << 0)
55 #define GEN8_CSB_WRITE_PTR(csb_status) \
56 (((csb_status) & GEN8_CSB_WRITE_PTR_MASK) >> 0)
57 #define GEN8_CSB_READ_PTR(csb_status) \
58 (((csb_status) & GEN8_CSB_READ_PTR_MASK) >> 8)
61 int intel_logical_ring_alloc_request_extras(struct drm_i915_gem_request *request);
62 int intel_logical_ring_reserve_space(struct drm_i915_gem_request *request);
63 void intel_logical_ring_stop(struct intel_engine_cs *engine);
64 void intel_logical_ring_cleanup(struct intel_engine_cs *engine);
65 int intel_logical_rings_init(struct drm_device *dev);
67 int logical_ring_flush_all_caches(struct drm_i915_gem_request *req);
69 * intel_logical_ring_advance() - advance the ringbuffer tail
70 * @ringbuf: Ringbuffer to advance.
72 * The tail is only updated in our logical ringbuffer struct.
74 static inline void intel_logical_ring_advance(struct intel_ringbuffer *ringbuf)
76 ringbuf->tail &= ringbuf->size - 1;
79 * intel_logical_ring_emit() - write a DWORD to the ringbuffer.
80 * @ringbuf: Ringbuffer to write to.
81 * @data: DWORD to write.
83 static inline void intel_logical_ring_emit(struct intel_ringbuffer *ringbuf,
86 iowrite32(data, ringbuf->virtual_start + ringbuf->tail);
89 static inline void intel_logical_ring_emit_reg(struct intel_ringbuffer *ringbuf,
92 intel_logical_ring_emit(ringbuf, i915_mmio_reg_offset(reg));
95 /* Logical Ring Contexts */
97 /* One extra page is added before LRC for GuC as shared data */
98 #define LRC_GUCSHR_PN (0)
99 #define LRC_PPHWSP_PN (LRC_GUCSHR_PN + 1)
100 #define LRC_STATE_PN (LRC_PPHWSP_PN + 1)
102 void intel_lr_context_free(struct intel_context *ctx);
103 uint32_t intel_lr_context_size(struct intel_engine_cs *engine);
104 void intel_lr_context_unpin(struct intel_context *ctx,
105 struct intel_engine_cs *engine);
107 struct drm_i915_private;
109 void intel_lr_context_reset(struct drm_i915_private *dev_priv,
110 struct intel_context *ctx);
111 uint64_t intel_lr_context_descriptor(struct intel_context *ctx,
112 struct intel_engine_cs *engine);
115 int intel_sanitize_enable_execlists(struct drm_device *dev, int enable_execlists);
116 struct i915_execbuffer_params;
117 int intel_execlists_submission(struct i915_execbuffer_params *params,
118 struct drm_i915_gem_execbuffer2 *args,
119 struct list_head *vmas);
121 void intel_execlists_retire_requests(struct intel_engine_cs *engine);
123 #endif /* _INTEL_LRC_H_ */