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linux_dsm_epyc7002/drivers/gpu/drm/i915/gvt/mmio_context.c
Chris Wilson 251d46b087 drm/i915/gvt: Pin the per-engine GVT shadow contexts 
Our eventual goal is to rid request construction of struct_mutex, with
the short term step of lifting the struct_mutex requirements into the
higher levels (i.e. the caller must ensure that the context is already
pinned into the GTT). In this patch, we pin GVT's shadow context upon
allocation and so keep them pinned into the GGTT for as long as the
virtual machine is alive, and so we can use the simpler request
construction path safe in the knowledge that the hard work is already
done.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Acked-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190426163336.15906-1-chris@chris-wilson.co.uk
2019-04-26 18:31:57 +01:00

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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), 0xffff, 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), 0xffff, 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_uncore *uncore = &dev_priv->uncore;
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(uncore, reg,
FW_REG_READ | FW_REG_WRITE);
if (ring_id == RCS0 && INTEL_GEN(dev_priv) >= 9)
fw |= FORCEWAKE_RENDER;
intel_uncore_forcewake_get(uncore, fw);
intel_uncore_write_fw(uncore, reg, 0x1);
if (wait_for_atomic((intel_uncore_read_fw(uncore, 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(uncore, 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[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->uncore, FORCEWAKE_ALL);
switch_mmio(pre, next, ring_id);
intel_uncore_forcewake_put(&dev_priv->uncore, 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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