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linux_dsm_epyc7002/drivers/gpu/drm/i915/gvt/mmio_context.c
Chris Wilson 8a68d46436 drm/i915: Store the BIT(engine->id) as the engine's mask 
In the next patch, we are introducing a broad virtual engine to encompass
multiple physical engines, losing the 1:1 nature of BIT(engine->id). To
reflect the broader set of engines implied by the virtual instance, lets
store the full bitmask.

v2: Use intel_engine_mask_t (s/ring_mask/engine_mask/)
v3: Tvrtko voted for moah churn so teach everyone to not mention ring
and use $class$instance throughout.
v4: Comment upon the disparity in bspec for using VCS1,VCS2 in gen8 and
VCS[0-4] in later gen. We opt to keep the code consistent and use
0-index naming throughout.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190305180332.30900-1-chris@chris-wilson.co.uk
2019-03-05 18:19:50 +00:00

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/*
* Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
*
* 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.
*
* Authors:
* Eddie Dong <eddie.dong@intel.com>
* Kevin Tian <kevin.tian@intel.com>
*
* Contributors:
* Zhi Wang <zhi.a.wang@intel.com>
* Changbin Du <changbin.du@intel.com>
* Zhenyu Wang <zhenyuw@linux.intel.com>
* Tina Zhang <tina.zhang@intel.com>
* Bing Niu <bing.niu@intel.com>
*
*/
#include "i915_drv.h"
#include "gvt.h"
#include "trace.h"
#define GEN9_MOCS_SIZE 64
/* Raw offset is appened to each line for convenience. */
static struct engine_mmio gen8_engine_mmio_list[] __cacheline_aligned = {
{RCS0, GFX_MODE_GEN7, 0xffff, false}, /* 0x229c */
{RCS0, GEN9_CTX_PREEMPT_REG, 0x0, false}, /* 0x2248 */
{RCS0, HWSTAM, 0x0, false}, /* 0x2098 */
{RCS0, INSTPM, 0xffff, true}, /* 0x20c0 */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 0), 0, false}, /* 0x24d0 */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 1), 0, false}, /* 0x24d4 */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 2), 0, false}, /* 0x24d8 */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 3), 0, false}, /* 0x24dc */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 4), 0, false}, /* 0x24e0 */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 5), 0, false}, /* 0x24e4 */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 6), 0, false}, /* 0x24e8 */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 7), 0, false}, /* 0x24ec */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 8), 0, false}, /* 0x24f0 */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 9), 0, false}, /* 0x24f4 */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 10), 0, false}, /* 0x24f8 */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 11), 0, false}, /* 0x24fc */
{RCS0, CACHE_MODE_1, 0xffff, true}, /* 0x7004 */
{RCS0, GEN7_GT_MODE, 0xffff, true}, /* 0x7008 */
{RCS0, CACHE_MODE_0_GEN7, 0xffff, true}, /* 0x7000 */
{RCS0, GEN7_COMMON_SLICE_CHICKEN1, 0xffff, true}, /* 0x7010 */
{RCS0, HDC_CHICKEN0, 0xffff, true}, /* 0x7300 */
{RCS0, VF_GUARDBAND, 0xffff, true}, /* 0x83a4 */
{BCS0, RING_GFX_MODE(BLT_RING_BASE), 0xffff, false}, /* 0x2229c */
{BCS0, RING_MI_MODE(BLT_RING_BASE), 0xffff, false}, /* 0x2209c */
{BCS0, RING_INSTPM(BLT_RING_BASE), 0xffff, false}, /* 0x220c0 */
{BCS0, RING_HWSTAM(BLT_RING_BASE), 0x0, false}, /* 0x22098 */
{BCS0, RING_EXCC(BLT_RING_BASE), 0x0, false}, /* 0x22028 */
{RCS0, INVALID_MMIO_REG, 0, false } /* Terminated */
};
static struct engine_mmio gen9_engine_mmio_list[] __cacheline_aligned = {
{RCS0, GFX_MODE_GEN7, 0xffff, false}, /* 0x229c */
{RCS0, GEN9_CTX_PREEMPT_REG, 0x0, false}, /* 0x2248 */
{RCS0, HWSTAM, 0x0, false}, /* 0x2098 */
{RCS0, INSTPM, 0xffff, true}, /* 0x20c0 */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 0), 0, false}, /* 0x24d0 */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 1), 0, false}, /* 0x24d4 */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 2), 0, false}, /* 0x24d8 */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 3), 0, false}, /* 0x24dc */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 4), 0, false}, /* 0x24e0 */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 5), 0, false}, /* 0x24e4 */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 6), 0, false}, /* 0x24e8 */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 7), 0, false}, /* 0x24ec */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 8), 0, false}, /* 0x24f0 */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 9), 0, false}, /* 0x24f4 */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 10), 0, false}, /* 0x24f8 */
{RCS0, RING_FORCE_TO_NONPRIV(RENDER_RING_BASE, 11), 0, false}, /* 0x24fc */
{RCS0, CACHE_MODE_1, 0xffff, true}, /* 0x7004 */
{RCS0, GEN7_GT_MODE, 0xffff, true}, /* 0x7008 */
{RCS0, CACHE_MODE_0_GEN7, 0xffff, true}, /* 0x7000 */
{RCS0, GEN7_COMMON_SLICE_CHICKEN1, 0xffff, true}, /* 0x7010 */
{RCS0, HDC_CHICKEN0, 0xffff, true}, /* 0x7300 */
{RCS0, VF_GUARDBAND, 0xffff, true}, /* 0x83a4 */
{RCS0, GEN8_PRIVATE_PAT_LO, 0, false}, /* 0x40e0 */
{RCS0, GEN8_PRIVATE_PAT_HI, 0, false}, /* 0x40e4 */
{RCS0, GEN8_CS_CHICKEN1, 0xffff, true}, /* 0x2580 */
{RCS0, COMMON_SLICE_CHICKEN2, 0xffff, true}, /* 0x7014 */
{RCS0, GEN9_CS_DEBUG_MODE1, 0xffff, false}, /* 0x20ec */
{RCS0, GEN8_L3SQCREG4, 0, false}, /* 0xb118 */
{RCS0, GEN7_HALF_SLICE_CHICKEN1, 0xffff, true}, /* 0xe100 */
{RCS0, HALF_SLICE_CHICKEN2, 0xffff, true}, /* 0xe180 */
{RCS0, HALF_SLICE_CHICKEN3, 0xffff, true}, /* 0xe184 */
{RCS0, GEN9_HALF_SLICE_CHICKEN5, 0xffff, true}, /* 0xe188 */
{RCS0, GEN9_HALF_SLICE_CHICKEN7, 0xffff, true}, /* 0xe194 */
{RCS0, GEN8_ROW_CHICKEN, 0xffff, true}, /* 0xe4f0 */
{RCS0, TRVATTL3PTRDW(0), 0, false}, /* 0x4de0 */
{RCS0, TRVATTL3PTRDW(1), 0, false}, /* 0x4de4 */
{RCS0, TRNULLDETCT, 0, false}, /* 0x4de8 */
{RCS0, TRINVTILEDETCT, 0, false}, /* 0x4dec */
{RCS0, TRVADR, 0, false}, /* 0x4df0 */
{RCS0, TRTTE, 0, false}, /* 0x4df4 */
{BCS0, RING_GFX_MODE(BLT_RING_BASE), 0xffff, false}, /* 0x2229c */
{BCS0, RING_MI_MODE(BLT_RING_BASE), 0xffff, false}, /* 0x2209c */
{BCS0, RING_INSTPM(BLT_RING_BASE), 0xffff, false}, /* 0x220c0 */
{BCS0, RING_HWSTAM(BLT_RING_BASE), 0x0, false}, /* 0x22098 */
{BCS0, RING_EXCC(BLT_RING_BASE), 0x0, false}, /* 0x22028 */
{VCS1, RING_EXCC(GEN8_BSD2_RING_BASE), 0xffff, false}, /* 0x1c028 */
{VECS0, RING_EXCC(VEBOX_RING_BASE), 0xffff, false}, /* 0x1a028 */
{RCS0, GEN8_HDC_CHICKEN1, 0xffff, true}, /* 0x7304 */
{RCS0, GEN9_CTX_PREEMPT_REG, 0x0, false}, /* 0x2248 */
{RCS0, GEN7_UCGCTL4, 0x0, false}, /* 0x940c */
{RCS0, GAMT_CHKN_BIT_REG, 0x0, false}, /* 0x4ab8 */
{RCS0, GEN9_GAMT_ECO_REG_RW_IA, 0x0, false}, /* 0x4ab0 */
{RCS0, GEN9_CSFE_CHICKEN1_RCS, 0xffff, false}, /* 0x20d4 */
{RCS0, GEN8_GARBCNTL, 0x0, false}, /* 0xb004 */
{RCS0, GEN7_FF_THREAD_MODE, 0x0, false}, /* 0x20a0 */
{RCS0, FF_SLICE_CS_CHICKEN2, 0xffff, false}, /* 0x20e4 */
{RCS0, INVALID_MMIO_REG, 0, false } /* Terminated */
};
static struct {
bool initialized;
u32 control_table[I915_NUM_ENGINES][GEN9_MOCS_SIZE];
u32 l3cc_table[GEN9_MOCS_SIZE / 2];
} gen9_render_mocs;
static void load_render_mocs(struct drm_i915_private *dev_priv)
{
i915_reg_t offset;
u32 regs[] = {
[RCS0] = 0xc800,
[VCS0] = 0xc900,
[VCS1] = 0xca00,
[BCS0] = 0xcc00,
[VECS0] = 0xcb00,
};
int ring_id, i;
for (ring_id = 0; ring_id < ARRAY_SIZE(regs); ring_id++) {
if (!HAS_ENGINE(dev_priv, ring_id))
continue;
offset.reg = regs[ring_id];
for (i = 0; i < GEN9_MOCS_SIZE; i++) {
gen9_render_mocs.control_table[ring_id][i] =
I915_READ_FW(offset);
offset.reg += 4;
}
}
offset.reg = 0xb020;
for (i = 0; i < GEN9_MOCS_SIZE / 2; i++) {
gen9_render_mocs.l3cc_table[i] =
I915_READ_FW(offset);
offset.reg += 4;
}
gen9_render_mocs.initialized = true;
}
static int
restore_context_mmio_for_inhibit(struct intel_vgpu *vgpu,
struct i915_request *req)
{
u32 *cs;
int ret;
struct engine_mmio *mmio;
struct intel_gvt *gvt = vgpu->gvt;
int ring_id = req->engine->id;
int count = gvt->engine_mmio_list.ctx_mmio_count[ring_id];
if (count == 0)
return 0;
ret = req->engine->emit_flush(req, EMIT_BARRIER);
if (ret)
return ret;
cs = intel_ring_begin(req, count * 2 + 2);
if (IS_ERR(cs))
return PTR_ERR(cs);
*cs++ = MI_LOAD_REGISTER_IMM(count);
for (mmio = gvt->engine_mmio_list.mmio;
i915_mmio_reg_valid(mmio->reg); mmio++) {
if (mmio->ring_id != ring_id ||
!mmio->in_context)
continue;
*cs++ = i915_mmio_reg_offset(mmio->reg);
*cs++ = vgpu_vreg_t(vgpu, mmio->reg) |
(mmio->mask << 16);
gvt_dbg_core("add lri reg pair 0x%x:0x%x in inhibit ctx, vgpu:%d, rind_id:%d\n",
*(cs-2), *(cs-1), vgpu->id, ring_id);
}
*cs++ = MI_NOOP;
intel_ring_advance(req, cs);
ret = req->engine->emit_flush(req, EMIT_BARRIER);
if (ret)
return ret;
return 0;
}
static int
restore_render_mocs_control_for_inhibit(struct intel_vgpu *vgpu,
struct i915_request *req)
{
unsigned int index;
u32 *cs;
cs = intel_ring_begin(req, 2 * GEN9_MOCS_SIZE + 2);
if (IS_ERR(cs))
return PTR_ERR(cs);
*cs++ = MI_LOAD_REGISTER_IMM(GEN9_MOCS_SIZE);
for (index = 0; index < GEN9_MOCS_SIZE; index++) {
*cs++ = i915_mmio_reg_offset(GEN9_GFX_MOCS(index));
*cs++ = vgpu_vreg_t(vgpu, GEN9_GFX_MOCS(index));
gvt_dbg_core("add lri reg pair 0x%x:0x%x in inhibit ctx, vgpu:%d, rind_id:%d\n",
*(cs-2), *(cs-1), vgpu->id, req->engine->id);
}
*cs++ = MI_NOOP;
intel_ring_advance(req, cs);
return 0;
}
static int
restore_render_mocs_l3cc_for_inhibit(struct intel_vgpu *vgpu,
struct i915_request *req)
{
unsigned int index;
u32 *cs;
cs = intel_ring_begin(req, 2 * GEN9_MOCS_SIZE / 2 + 2);
if (IS_ERR(cs))
return PTR_ERR(cs);
*cs++ = MI_LOAD_REGISTER_IMM(GEN9_MOCS_SIZE / 2);
for (index = 0; index < GEN9_MOCS_SIZE / 2; index++) {
*cs++ = i915_mmio_reg_offset(GEN9_LNCFCMOCS(index));
*cs++ = vgpu_vreg_t(vgpu, GEN9_LNCFCMOCS(index));
gvt_dbg_core("add lri reg pair 0x%x:0x%x in inhibit ctx, vgpu:%d, rind_id:%d\n",
*(cs-2), *(cs-1), vgpu->id, req->engine->id);
}
*cs++ = MI_NOOP;
intel_ring_advance(req, cs);
return 0;
}
/*
* Use lri command to initialize the mmio which is in context state image for
* inhibit context, it contains tracked engine mmio, render_mocs and
* render_mocs_l3cc.
*/
int intel_vgpu_restore_inhibit_context(struct intel_vgpu *vgpu,
struct i915_request *req)
{
int ret;
u32 *cs;
cs = intel_ring_begin(req, 2);
if (IS_ERR(cs))
return PTR_ERR(cs);
*cs++ = MI_ARB_ON_OFF | MI_ARB_DISABLE;
*cs++ = MI_NOOP;
intel_ring_advance(req, cs);
ret = restore_context_mmio_for_inhibit(vgpu, req);
if (ret)
goto out;
/* no MOCS register in context except render engine */
if (req->engine->id != RCS0)
goto out;
ret = restore_render_mocs_control_for_inhibit(vgpu, req);
if (ret)
goto out;
ret = restore_render_mocs_l3cc_for_inhibit(vgpu, req);
if (ret)
goto out;
out:
cs = intel_ring_begin(req, 2);
if (IS_ERR(cs))
return PTR_ERR(cs);
*cs++ = MI_ARB_ON_OFF | MI_ARB_ENABLE;
*cs++ = MI_NOOP;
intel_ring_advance(req, cs);
return ret;
}
static void handle_tlb_pending_event(struct intel_vgpu *vgpu, int ring_id)
{
struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
struct intel_vgpu_submission *s = &vgpu->submission;
enum forcewake_domains fw;
i915_reg_t reg;
u32 regs[] = {
[RCS0] = 0x4260,
[VCS0] = 0x4264,
[VCS1] = 0x4268,
[BCS0] = 0x426c,
[VECS0] = 0x4270,
};
if (WARN_ON(ring_id >= ARRAY_SIZE(regs)))
return;
if (!test_and_clear_bit(ring_id, (void *)s->tlb_handle_pending))
return;
reg = _MMIO(regs[ring_id]);
/* WaForceWakeRenderDuringMmioTLBInvalidate:skl
* we need to put a forcewake when invalidating RCS TLB caches,
* otherwise device can go to RC6 state and interrupt invalidation
* process
*/
fw = intel_uncore_forcewake_for_reg(dev_priv, reg,
FW_REG_READ | FW_REG_WRITE);
if (ring_id == RCS0 && INTEL_GEN(dev_priv) >= 9)
fw |= FORCEWAKE_RENDER;
intel_uncore_forcewake_get(dev_priv, fw);
I915_WRITE_FW(reg, 0x1);
if (wait_for_atomic((I915_READ_FW(reg) == 0), 50))
gvt_vgpu_err("timeout in invalidate ring (%d) tlb\n", ring_id);
else
vgpu_vreg_t(vgpu, reg) = 0;
intel_uncore_forcewake_put(dev_priv, fw);
gvt_dbg_core("invalidate TLB for ring %d\n", ring_id);
}
static void switch_mocs(struct intel_vgpu *pre, struct intel_vgpu *next,
int ring_id)
{
struct drm_i915_private *dev_priv;
i915_reg_t offset, l3_offset;
u32 old_v, new_v;
u32 regs[] = {
[RCS0] = 0xc800,
[VCS0] = 0xc900,
[VCS1] = 0xca00,
[BCS0] = 0xcc00,
[VECS0] = 0xcb00,
};
int i;
dev_priv = pre ? pre->gvt->dev_priv : next->gvt->dev_priv;
if (WARN_ON(ring_id >= ARRAY_SIZE(regs)))
return;
if (ring_id == RCS0 &&
(IS_KABYLAKE(dev_priv) ||
IS_BROXTON(dev_priv) ||
IS_COFFEELAKE(dev_priv)))
return;
if (!pre && !gen9_render_mocs.initialized)
load_render_mocs(dev_priv);
offset.reg = regs[ring_id];
for (i = 0; i < GEN9_MOCS_SIZE; i++) {
if (pre)
old_v = vgpu_vreg_t(pre, offset);
else
old_v = gen9_render_mocs.control_table[ring_id][i];
if (next)
new_v = vgpu_vreg_t(next, offset);
else
new_v = gen9_render_mocs.control_table[ring_id][i];
if (old_v != new_v)
I915_WRITE_FW(offset, new_v);
offset.reg += 4;
}
if (ring_id == RCS0) {
l3_offset.reg = 0xb020;
for (i = 0; i < GEN9_MOCS_SIZE / 2; i++) {
if (pre)
old_v = vgpu_vreg_t(pre, l3_offset);
else
old_v = gen9_render_mocs.l3cc_table[i];
if (next)
new_v = vgpu_vreg_t(next, l3_offset);
else
new_v = gen9_render_mocs.l3cc_table[i];
if (old_v != new_v)
I915_WRITE_FW(l3_offset, new_v);
l3_offset.reg += 4;
}
}
}
#define CTX_CONTEXT_CONTROL_VAL 0x03
bool is_inhibit_context(struct intel_context *ce)
{
const u32 *reg_state = ce->lrc_reg_state;
u32 inhibit_mask =
_MASKED_BIT_ENABLE(CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT);
return inhibit_mask ==
(reg_state[CTX_CONTEXT_CONTROL_VAL] & inhibit_mask);
}
/* Switch ring mmio values (context). */
static void switch_mmio(struct intel_vgpu *pre,
struct intel_vgpu *next,
int ring_id)
{
struct drm_i915_private *dev_priv;
struct intel_vgpu_submission *s;
struct engine_mmio *mmio;
u32 old_v, new_v;
dev_priv = pre ? pre->gvt->dev_priv : next->gvt->dev_priv;
if (INTEL_GEN(dev_priv) >= 9)
switch_mocs(pre, next, ring_id);
for (mmio = dev_priv->gvt->engine_mmio_list.mmio;
i915_mmio_reg_valid(mmio->reg); mmio++) {
if (mmio->ring_id != ring_id)
continue;
/*
* No need to do save or restore of the mmio which is in context
* state image on kabylake, it's initialized by lri command and
* save or restore with context together.
*/
if ((IS_KABYLAKE(dev_priv) || IS_BROXTON(dev_priv)
|| IS_COFFEELAKE(dev_priv)) && mmio->in_context)
continue;
// save
if (pre) {
vgpu_vreg_t(pre, mmio->reg) = I915_READ_FW(mmio->reg);
if (mmio->mask)
vgpu_vreg_t(pre, mmio->reg) &=
~(mmio->mask << 16);
old_v = vgpu_vreg_t(pre, mmio->reg);
} else
old_v = mmio->value = I915_READ_FW(mmio->reg);
// restore
if (next) {
s = &next->submission;
/*
* No need to restore the mmio which is in context state
* image if it's not inhibit context, it will restore
* itself.
*/
if (mmio->in_context &&
!is_inhibit_context(&s->shadow_ctx->__engine[ring_id]))
continue;
if (mmio->mask)
new_v = vgpu_vreg_t(next, mmio->reg) |
(mmio->mask << 16);
else
new_v = vgpu_vreg_t(next, mmio->reg);
} else {
if (mmio->in_context)
continue;
if (mmio->mask)
new_v = mmio->value | (mmio->mask << 16);
else
new_v = mmio->value;
}
I915_WRITE_FW(mmio->reg, new_v);
trace_render_mmio(pre ? pre->id : 0,
next ? next->id : 0,
"switch",
i915_mmio_reg_offset(mmio->reg),
old_v, new_v);
}
if (next)
handle_tlb_pending_event(next, ring_id);
}
/**
* intel_gvt_switch_render_mmio - switch mmio context of specific engine
* @pre: the last vGPU that own the engine
* @next: the vGPU to switch to
* @ring_id: specify the engine
*
* If pre is null indicates that host own the engine. If next is null
* indicates that we are switching to host workload.
*/
void intel_gvt_switch_mmio(struct intel_vgpu *pre,
struct intel_vgpu *next, int ring_id)
{
struct drm_i915_private *dev_priv;
if (WARN_ON(!pre && !next))
return;
gvt_dbg_render("switch ring %d from %s to %s\n", ring_id,
pre ? "vGPU" : "host", next ? "vGPU" : "HOST");
dev_priv = pre ? pre->gvt->dev_priv : next->gvt->dev_priv;
/**
* We are using raw mmio access wrapper to improve the
* performace for batch mmio read/write, so we need
* handle forcewake mannually.
*/
intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
switch_mmio(pre, next, ring_id);
intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
}
/**
* intel_gvt_init_engine_mmio_context - Initiate the engine mmio list
* @gvt: GVT device
*
*/
void intel_gvt_init_engine_mmio_context(struct intel_gvt *gvt)
{
struct engine_mmio *mmio;
if (INTEL_GEN(gvt->dev_priv) >= 9)
gvt->engine_mmio_list.mmio = gen9_engine_mmio_list;
else
gvt->engine_mmio_list.mmio = gen8_engine_mmio_list;
for (mmio = gvt->engine_mmio_list.mmio;
i915_mmio_reg_valid(mmio->reg); mmio++) {
if (mmio->in_context) {
gvt->engine_mmio_list.ctx_mmio_count[mmio->ring_id]++;
intel_gvt_mmio_set_in_ctx(gvt, mmio->reg.reg);
}
}
}
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