forked from Minki/linux
f8a58d639d
Buffer based command transport can replace MMIO based mechanism.
It may be used to perform host-2-guc and guc-to-host communication.
Portions of this patch are based on work by:
Michel Thierry <michel.thierry@intel.com>
Robert Beckett <robert.beckett@intel.com>
Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
v2: use gem_object_pin_map (Chris)
don't use DEBUG_RATELIMITED (Chris)
don't track action stats (Chris)
simplify next fence (Chris)
use READ_ONCE (Chris)
move blob allocation to new function (Chris)
v3: use static owner id (Daniele)
v4: but keep channel initialization generic (Daniele)
and introduce owner_sub_id (Daniele)
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Oscar Mateo <oscar.mateo@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170526111326.87280-3-michal.wajdeczko@intel.com
87 lines
2.8 KiB
C
87 lines
2.8 KiB
C
/*
|
|
* Copyright © 2016-2017 Intel Corporation
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the next
|
|
* paragraph) shall be included in all copies or substantial portions of the
|
|
* Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
* IN THE SOFTWARE.
|
|
*/
|
|
|
|
#ifndef _INTEL_GUC_CT_H_
|
|
#define _INTEL_GUC_CT_H_
|
|
|
|
struct intel_guc;
|
|
struct i915_vma;
|
|
|
|
#include "intel_guc_fwif.h"
|
|
|
|
/**
|
|
* DOC: Command Transport (CT).
|
|
*
|
|
* Buffer based command transport is a replacement for MMIO based mechanism.
|
|
* It can be used to perform both host-2-guc and guc-to-host communication.
|
|
*/
|
|
|
|
/** Represents single command transport buffer.
|
|
*
|
|
* A single command transport buffer consists of two parts, the header
|
|
* record (command transport buffer descriptor) and the actual buffer which
|
|
* holds the commands.
|
|
*
|
|
* @desc: pointer to the buffer descriptor
|
|
* @cmds: pointer to the commands buffer
|
|
*/
|
|
struct intel_guc_ct_buffer {
|
|
struct guc_ct_buffer_desc *desc;
|
|
u32 *cmds;
|
|
};
|
|
|
|
/** Represents pair of command transport buffers.
|
|
*
|
|
* Buffers go in pairs to allow bi-directional communication.
|
|
* To simplify the code we place both of them in the same vma.
|
|
* Buffers from the same pair must share unique owner id.
|
|
*
|
|
* @vma: pointer to the vma with pair of CT buffers
|
|
* @ctbs: buffers for sending(0) and receiving(1) commands
|
|
* @owner: unique identifier
|
|
* @next_fence: fence to be used with next send command
|
|
*/
|
|
struct intel_guc_ct_channel {
|
|
struct i915_vma *vma;
|
|
struct intel_guc_ct_buffer ctbs[2];
|
|
u32 owner;
|
|
u32 next_fence;
|
|
};
|
|
|
|
/** Holds all command transport channels.
|
|
*
|
|
* @host_channel: main channel used by the host
|
|
*/
|
|
struct intel_guc_ct {
|
|
struct intel_guc_ct_channel host_channel;
|
|
/* other channels are tbd */
|
|
};
|
|
|
|
void intel_guc_ct_init_early(struct intel_guc_ct *ct);
|
|
|
|
/* XXX: move to intel_uc.h ? don't fit there either */
|
|
int intel_guc_enable_ct(struct intel_guc *guc);
|
|
void intel_guc_disable_ct(struct intel_guc *guc);
|
|
|
|
#endif /* _INTEL_GUC_CT_H_ */
|