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/*
* Copyright © 2014 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_LRC_H_
#define _INTEL_LRC_H_
#include <linux/types.h>
struct drm_printer;
struct drm_i915_private;
struct i915_gem_context;
struct i915_request;
struct intel_context;
struct intel_engine_cs;
/* Execlists regs */
#define RING_ELSP(base) _MMIO((base) + 0x230)
#define RING_EXECLIST_STATUS_LO(base) _MMIO((base) + 0x234)
#define RING_EXECLIST_STATUS_HI(base) _MMIO((base) + 0x234 + 4)
#define RING_CONTEXT_CONTROL(base) _MMIO((base) + 0x244)
#define CTX_CTRL_INHIBIT_SYN_CTX_SWITCH (1 << 3)
#define CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT (1 << 0)
#define CTX_CTRL_RS_CTX_ENABLE (1 << 1)
#define CTX_CTRL_ENGINE_CTX_SAVE_INHIBIT (1 << 2)
#define RING_CONTEXT_STATUS_PTR(base) _MMIO((base) + 0x3a0)
#define RING_EXECLIST_SQ_CONTENTS(base) _MMIO((base) + 0x510)
#define RING_EXECLIST_CONTROL(base) _MMIO((base) + 0x550)
#define EL_CTRL_LOAD (1 << 0)
/* The docs specify that the write pointer wraps around after 5h, "After status
* is written out to the last available status QW at offset 5h, this pointer
* wraps to 0."
*
* Therefore, one must infer than even though there are 3 bits available, 6 and
* 7 appear to be * reserved.
*/
#define GEN8_CSB_ENTRIES 6
#define GEN8_CSB_PTR_MASK 0x7
#define GEN8_CSB_READ_PTR_MASK (GEN8_CSB_PTR_MASK << 8)
#define GEN8_CSB_WRITE_PTR_MASK (GEN8_CSB_PTR_MASK << 0)
#define GEN11_CSB_ENTRIES 12
#define GEN11_CSB_PTR_MASK 0xf
#define GEN11_CSB_READ_PTR_MASK (GEN11_CSB_PTR_MASK << 8)
#define GEN11_CSB_WRITE_PTR_MASK (GEN11_CSB_PTR_MASK << 0)
#define MAX_CONTEXT_HW_ID (1<<21) /* exclusive */
#define MAX_GUC_CONTEXT_HW_ID (1 << 20) /* exclusive */
#define GEN11_MAX_CONTEXT_HW_ID (1<<11) /* exclusive */
/* in Gen12 ID 0x7FF is reserved to indicate idle */
#define GEN12_MAX_CONTEXT_HW_ID (GEN11_MAX_CONTEXT_HW_ID - 1)
enum {
INTEL_CONTEXT_SCHEDULE_IN = 0,
INTEL_CONTEXT_SCHEDULE_OUT,
INTEL_CONTEXT_SCHEDULE_PREEMPTED,
};
/* Logical Rings */
void intel_logical_ring_cleanup(struct intel_engine_cs *engine);
int intel_execlists_submission_setup(struct intel_engine_cs *engine);
int intel_execlists_submission_init(struct intel_engine_cs *engine);
/* Logical Ring Contexts */
/*
* We allocate a header at the start of the context image for our own
* use, therefore the actual location of the logical state is offset
* from the start of the VMA. The layout is
*
* | [guc] | [hwsp] [logical state] |
* |<- our header ->|<- context image ->|
*
*/
/* The first page is used for sharing data with the GuC */
#define LRC_GUCSHR_PN (0)
#define LRC_GUCSHR_SZ (1)
/* At the start of the context image is its per-process HWS page */
#define LRC_PPHWSP_PN (LRC_GUCSHR_PN + LRC_GUCSHR_SZ)
#define LRC_PPHWSP_SZ (1)
/* Finally we have the logical state for the context */
#define LRC_STATE_PN (LRC_PPHWSP_PN + LRC_PPHWSP_SZ)
/*
* Currently we include the PPHWSP in __intel_engine_context_size() so
* the size of the header is synonymous with the start of the PPHWSP.
*/
#define LRC_HEADER_PAGES LRC_PPHWSP_PN
/* Space within PPHWSP reserved to be used as scratch */
#define LRC_PPHWSP_SCRATCH 0x34
#define LRC_PPHWSP_SCRATCH_ADDR (LRC_PPHWSP_SCRATCH * sizeof(u32))
void intel_execlists_set_default_submission(struct intel_engine_cs *engine);
void intel_lr_context_reset(struct intel_engine_cs *engine,
struct intel_context *ce,
u32 head,
bool scrub);
void intel_execlists_show_requests(struct intel_engine_cs *engine,
struct drm_printer *m,
void (*show_request)(struct drm_printer *m,
struct i915_request *rq,
const char *prefix),
unsigned int max);
struct intel_context *
intel_execlists_create_virtual(struct i915_gem_context *ctx,
struct intel_engine_cs **siblings,
unsigned int count);
struct intel_context *
intel_execlists_clone_virtual(struct i915_gem_context *ctx,
struct intel_engine_cs *src);
int intel_virtual_engine_attach_bond(struct intel_engine_cs *engine,
const struct intel_engine_cs *master,
const struct intel_engine_cs *sibling);
struct intel_engine_cs *
intel_virtual_engine_get_sibling(struct intel_engine_cs *engine,
unsigned int sibling);
#endif /* _INTEL_LRC_H_ */
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