projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| f8a58d63 MW |
1 | /* |
| 2 | * Copyright © 2016-2017 Intel Corporation | |
| 3 | * | |
| 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: | |
| 10 | * | |
| 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 | |
| 13 | * Software. | |
| 14 | * | |
| 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 DEALINGS | |
| 21 | * IN THE SOFTWARE. | |
| 22 | */ | |
| 23 | ||
| 24 | #ifndef _INTEL_GUC_CT_H_ | |
| 25 | #define _INTEL_GUC_CT_H_ | |
| 26 | ||
| 27 | struct intel_guc; | |
| 28 | struct i915_vma; | |
| 29 | ||
| 30 | #include "intel_guc_fwif.h" | |
| 31 | ||
| 32 | /** | |
| 33 | * DOC: Command Transport (CT). | |
| 34 | * | |
| 35 | * Buffer based command transport is a replacement for MMIO based mechanism. | |
| 36 | * It can be used to perform both host-2-guc and guc-to-host communication. | |
| 37 | */ | |
| 38 | ||
| 39 | /** Represents single command transport buffer. | |
| 40 | * | |
| 41 | * A single command transport buffer consists of two parts, the header | |
| 42 | * record (command transport buffer descriptor) and the actual buffer which | |
| 43 | * holds the commands. | |
| 44 | * | |
| 45 | * @desc: pointer to the buffer descriptor | |
| 46 | * @cmds: pointer to the commands buffer | |
| 47 | */ | |
| 48 | struct intel_guc_ct_buffer { | |
| 49 | struct guc_ct_buffer_desc *desc; | |
| 50 | u32 *cmds; | |
| 51 | }; | |
| 52 | ||
| 53 | /** Represents pair of command transport buffers. | |
| 54 | * | |
| 55 | * Buffers go in pairs to allow bi-directional communication. | |
| 56 | * To simplify the code we place both of them in the same vma. | |
| 57 | * Buffers from the same pair must share unique owner id. | |
| 58 | * | |
| 59 | * @vma: pointer to the vma with pair of CT buffers | |
| 60 | * @ctbs: buffers for sending(0) and receiving(1) commands | |
| 61 | * @owner: unique identifier | |
| 62 | * @next_fence: fence to be used with next send command | |
| 63 | */ | |
| 64 | struct intel_guc_ct_channel { | |
| 65 | struct i915_vma *vma; | |
| 66 | struct intel_guc_ct_buffer ctbs[2]; | |
| 67 | u32 owner; | |
| 68 | u32 next_fence; | |
| 69 | }; | |
| 70 | ||
| 71 | /** Holds all command transport channels. | |
| 72 | * | |
| 73 | * @host_channel: main channel used by the host | |
| 74 | */ | |
| 75 | struct intel_guc_ct { | |
| 76 | struct intel_guc_ct_channel host_channel; | |
| 77 | /* other channels are tbd */ | |
| 78 | }; | |
| 79 | ||
| 80 | void intel_guc_ct_init_early(struct intel_guc_ct *ct); | |
| 81 | ||
| 82 | /* XXX: move to intel_uc.h ? don't fit there either */ | |
| 83 | int intel_guc_enable_ct(struct intel_guc *guc); | |
| 84 | void intel_guc_disable_ct(struct intel_guc *guc); | |
| 85 | ||
| 86 | #endif /* _INTEL_GUC_CT_H_ */ |