98 lines
2.1 KiB
C
98 lines
2.1 KiB
C
// SPDX-License-Identifier: MIT
|
|
/*
|
|
* Copyright © 2019 Intel Corporation
|
|
*/
|
|
|
|
#include "i915_drv.h"
|
|
#include "i915_vma.h"
|
|
#include "intel_context.h"
|
|
#include "intel_engine_pm.h"
|
|
#include "intel_gpu_commands.h"
|
|
#include "intel_lrc.h"
|
|
#include "intel_lrc_reg.h"
|
|
#include "intel_ring.h"
|
|
#include "intel_sseu.h"
|
|
|
|
static int gen8_emit_rpcs_config(struct i915_request *rq,
|
|
const struct intel_context *ce,
|
|
const struct intel_sseu sseu)
|
|
{
|
|
u64 offset;
|
|
u32 *cs;
|
|
|
|
cs = intel_ring_begin(rq, 4);
|
|
if (IS_ERR(cs))
|
|
return PTR_ERR(cs);
|
|
|
|
offset = i915_ggtt_offset(ce->state) +
|
|
LRC_STATE_OFFSET + CTX_R_PWR_CLK_STATE * 4;
|
|
|
|
*cs++ = MI_STORE_DWORD_IMM_GEN4 | MI_USE_GGTT;
|
|
*cs++ = lower_32_bits(offset);
|
|
*cs++ = upper_32_bits(offset);
|
|
*cs++ = intel_sseu_make_rpcs(rq->engine->gt, &sseu);
|
|
|
|
intel_ring_advance(rq, cs);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
gen8_modify_rpcs(struct intel_context *ce, const struct intel_sseu sseu)
|
|
{
|
|
struct i915_request *rq;
|
|
int ret;
|
|
|
|
lockdep_assert_held(&ce->pin_mutex);
|
|
|
|
/*
|
|
* If the context is not idle, we have to submit an ordered request to
|
|
* modify its context image via the kernel context (writing to our own
|
|
* image, or into the registers directory, does not stick). Pristine
|
|
* and idle contexts will be configured on pinning.
|
|
*/
|
|
if (!intel_context_pin_if_active(ce))
|
|
return 0;
|
|
|
|
rq = intel_engine_create_kernel_request(ce->engine);
|
|
if (IS_ERR(rq)) {
|
|
ret = PTR_ERR(rq);
|
|
goto out_unpin;
|
|
}
|
|
|
|
/* Serialise with the remote context */
|
|
ret = intel_context_prepare_remote_request(ce, rq);
|
|
if (ret == 0)
|
|
ret = gen8_emit_rpcs_config(rq, ce, sseu);
|
|
|
|
i915_request_add(rq);
|
|
out_unpin:
|
|
intel_context_unpin(ce);
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
intel_context_reconfigure_sseu(struct intel_context *ce,
|
|
const struct intel_sseu sseu)
|
|
{
|
|
int ret;
|
|
|
|
GEM_BUG_ON(GRAPHICS_VER(ce->engine->i915) < 8);
|
|
|
|
ret = intel_context_lock_pinned(ce);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Nothing to do if unmodified. */
|
|
if (!memcmp(&ce->sseu, &sseu, sizeof(sseu)))
|
|
goto unlock;
|
|
|
|
ret = gen8_modify_rpcs(ce, sseu);
|
|
if (!ret)
|
|
ce->sseu = sseu;
|
|
|
|
unlock:
|
|
intel_context_unlock_pinned(ce);
|
|
return ret;
|
|
}
|