mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-22 21:15:44 +07:00
ffe2a503b0
Use I915_WRITE_FW instead of I915_WRITE to reduce overhead. The overall mmio switch latency lowers from ~600us to ~180us. Signed-off-by: Changbin Du <changbin.du@intel.com> Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
408 lines
11 KiB
C
408 lines
11 KiB
C
/*
|
|
* 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"
|
|
|
|
struct render_mmio {
|
|
int ring_id;
|
|
i915_reg_t reg;
|
|
u32 mask;
|
|
bool in_context;
|
|
u32 value;
|
|
};
|
|
|
|
static struct render_mmio gen8_render_mmio_list[] __cacheline_aligned = {
|
|
{RCS, _MMIO(0x229c), 0xffff, false},
|
|
{RCS, _MMIO(0x2248), 0x0, false},
|
|
{RCS, _MMIO(0x2098), 0x0, false},
|
|
{RCS, _MMIO(0x20c0), 0xffff, true},
|
|
{RCS, _MMIO(0x24d0), 0, false},
|
|
{RCS, _MMIO(0x24d4), 0, false},
|
|
{RCS, _MMIO(0x24d8), 0, false},
|
|
{RCS, _MMIO(0x24dc), 0, false},
|
|
{RCS, _MMIO(0x24e0), 0, false},
|
|
{RCS, _MMIO(0x24e4), 0, false},
|
|
{RCS, _MMIO(0x24e8), 0, false},
|
|
{RCS, _MMIO(0x24ec), 0, false},
|
|
{RCS, _MMIO(0x24f0), 0, false},
|
|
{RCS, _MMIO(0x24f4), 0, false},
|
|
{RCS, _MMIO(0x24f8), 0, false},
|
|
{RCS, _MMIO(0x24fc), 0, false},
|
|
{RCS, _MMIO(0x7004), 0xffff, true},
|
|
{RCS, _MMIO(0x7008), 0xffff, true},
|
|
{RCS, _MMIO(0x7000), 0xffff, true},
|
|
{RCS, _MMIO(0x7010), 0xffff, true},
|
|
{RCS, _MMIO(0x7300), 0xffff, true},
|
|
{RCS, _MMIO(0x83a4), 0xffff, true},
|
|
|
|
{BCS, _MMIO(0x2229c), 0xffff, false},
|
|
{BCS, _MMIO(0x2209c), 0xffff, false},
|
|
{BCS, _MMIO(0x220c0), 0xffff, false},
|
|
{BCS, _MMIO(0x22098), 0x0, false},
|
|
{BCS, _MMIO(0x22028), 0x0, false},
|
|
};
|
|
|
|
static struct render_mmio gen9_render_mmio_list[] __cacheline_aligned = {
|
|
{RCS, _MMIO(0x229c), 0xffff, false},
|
|
{RCS, _MMIO(0x2248), 0x0, false},
|
|
{RCS, _MMIO(0x2098), 0x0, false},
|
|
{RCS, _MMIO(0x20c0), 0xffff, true},
|
|
{RCS, _MMIO(0x24d0), 0, false},
|
|
{RCS, _MMIO(0x24d4), 0, false},
|
|
{RCS, _MMIO(0x24d8), 0, false},
|
|
{RCS, _MMIO(0x24dc), 0, false},
|
|
{RCS, _MMIO(0x24e0), 0, false},
|
|
{RCS, _MMIO(0x24e4), 0, false},
|
|
{RCS, _MMIO(0x24e8), 0, false},
|
|
{RCS, _MMIO(0x24ec), 0, false},
|
|
{RCS, _MMIO(0x24f0), 0, false},
|
|
{RCS, _MMIO(0x24f4), 0, false},
|
|
{RCS, _MMIO(0x24f8), 0, false},
|
|
{RCS, _MMIO(0x24fc), 0, false},
|
|
{RCS, _MMIO(0x7004), 0xffff, true},
|
|
{RCS, _MMIO(0x7008), 0xffff, true},
|
|
{RCS, _MMIO(0x7000), 0xffff, true},
|
|
{RCS, _MMIO(0x7010), 0xffff, true},
|
|
{RCS, _MMIO(0x7300), 0xffff, true},
|
|
{RCS, _MMIO(0x83a4), 0xffff, true},
|
|
|
|
{RCS, _MMIO(0x40e0), 0, false},
|
|
{RCS, _MMIO(0x40e4), 0, false},
|
|
{RCS, _MMIO(0x2580), 0xffff, true},
|
|
{RCS, _MMIO(0x7014), 0xffff, true},
|
|
{RCS, _MMIO(0x20ec), 0xffff, false},
|
|
{RCS, _MMIO(0xb118), 0, false},
|
|
{RCS, _MMIO(0xe100), 0xffff, true},
|
|
{RCS, _MMIO(0xe180), 0xffff, true},
|
|
{RCS, _MMIO(0xe184), 0xffff, true},
|
|
{RCS, _MMIO(0xe188), 0xffff, true},
|
|
{RCS, _MMIO(0xe194), 0xffff, true},
|
|
{RCS, _MMIO(0x4de0), 0, false},
|
|
{RCS, _MMIO(0x4de4), 0, false},
|
|
{RCS, _MMIO(0x4de8), 0, false},
|
|
{RCS, _MMIO(0x4dec), 0, false},
|
|
{RCS, _MMIO(0x4df0), 0, false},
|
|
{RCS, _MMIO(0x4df4), 0, false},
|
|
|
|
{BCS, _MMIO(0x2229c), 0xffff, false},
|
|
{BCS, _MMIO(0x2209c), 0xffff, false},
|
|
{BCS, _MMIO(0x220c0), 0xffff, false},
|
|
{BCS, _MMIO(0x22098), 0x0, false},
|
|
{BCS, _MMIO(0x22028), 0x0, false},
|
|
|
|
{VCS2, _MMIO(0x1c028), 0xffff, false},
|
|
|
|
{VECS, _MMIO(0x1a028), 0xffff, false},
|
|
|
|
{RCS, _MMIO(0x7304), 0xffff, true},
|
|
{RCS, _MMIO(0x2248), 0x0, false},
|
|
{RCS, _MMIO(0x940c), 0x0, false},
|
|
{RCS, _MMIO(0x4ab8), 0x0, false},
|
|
|
|
{RCS, _MMIO(0x4ab0), 0x0, false},
|
|
{RCS, _MMIO(0x20d4), 0x0, false},
|
|
|
|
{RCS, _MMIO(0xb004), 0x0, false},
|
|
{RCS, _MMIO(0x20a0), 0x0, false},
|
|
{RCS, _MMIO(0x20e4), 0xffff, false},
|
|
};
|
|
|
|
static u32 gen9_render_mocs[I915_NUM_ENGINES][64];
|
|
static u32 gen9_render_mocs_L3[32];
|
|
|
|
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[] = {
|
|
[RCS] = 0x4260,
|
|
[VCS] = 0x4264,
|
|
[VCS2] = 0x4268,
|
|
[BCS] = 0x426c,
|
|
[VECS] = 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 == RCS && (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)))
|
|
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(vgpu, regs[ring_id]) = 0;
|
|
|
|
intel_uncore_forcewake_put(dev_priv, fw);
|
|
|
|
gvt_dbg_core("invalidate TLB for ring %d\n", ring_id);
|
|
}
|
|
|
|
static void load_mocs(struct intel_vgpu *vgpu, int ring_id)
|
|
{
|
|
struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
|
|
i915_reg_t offset, l3_offset;
|
|
u32 regs[] = {
|
|
[RCS] = 0xc800,
|
|
[VCS] = 0xc900,
|
|
[VCS2] = 0xca00,
|
|
[BCS] = 0xcc00,
|
|
[VECS] = 0xcb00,
|
|
};
|
|
int i;
|
|
|
|
if (WARN_ON(ring_id >= ARRAY_SIZE(regs)))
|
|
return;
|
|
|
|
offset.reg = regs[ring_id];
|
|
for (i = 0; i < 64; i++) {
|
|
gen9_render_mocs[ring_id][i] = I915_READ_FW(offset);
|
|
I915_WRITE_FW(offset, vgpu_vreg(vgpu, offset));
|
|
offset.reg += 4;
|
|
}
|
|
|
|
if (ring_id == RCS) {
|
|
l3_offset.reg = 0xb020;
|
|
for (i = 0; i < 32; i++) {
|
|
gen9_render_mocs_L3[i] = I915_READ_FW(l3_offset);
|
|
I915_WRITE_FW(l3_offset, vgpu_vreg(vgpu, l3_offset));
|
|
l3_offset.reg += 4;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void restore_mocs(struct intel_vgpu *vgpu, int ring_id)
|
|
{
|
|
struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
|
|
i915_reg_t offset, l3_offset;
|
|
u32 regs[] = {
|
|
[RCS] = 0xc800,
|
|
[VCS] = 0xc900,
|
|
[VCS2] = 0xca00,
|
|
[BCS] = 0xcc00,
|
|
[VECS] = 0xcb00,
|
|
};
|
|
int i;
|
|
|
|
if (WARN_ON(ring_id >= ARRAY_SIZE(regs)))
|
|
return;
|
|
|
|
offset.reg = regs[ring_id];
|
|
for (i = 0; i < 64; i++) {
|
|
vgpu_vreg(vgpu, offset) = I915_READ_FW(offset);
|
|
I915_WRITE_FW(offset, gen9_render_mocs[ring_id][i]);
|
|
offset.reg += 4;
|
|
}
|
|
|
|
if (ring_id == RCS) {
|
|
l3_offset.reg = 0xb020;
|
|
for (i = 0; i < 32; i++) {
|
|
vgpu_vreg(vgpu, l3_offset) = I915_READ_FW(l3_offset);
|
|
I915_WRITE_FW(l3_offset, gen9_render_mocs_L3[i]);
|
|
l3_offset.reg += 4;
|
|
}
|
|
}
|
|
}
|
|
|
|
#define CTX_CONTEXT_CONTROL_VAL 0x03
|
|
|
|
/* Switch ring mmio values (context) from host to a vgpu. */
|
|
static void switch_mmio_to_vgpu(struct intel_vgpu *vgpu, int ring_id)
|
|
{
|
|
struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
|
|
struct intel_vgpu_submission *s = &vgpu->submission;
|
|
u32 *reg_state = s->shadow_ctx->engine[ring_id].lrc_reg_state;
|
|
u32 ctx_ctrl = reg_state[CTX_CONTEXT_CONTROL_VAL];
|
|
u32 inhibit_mask =
|
|
_MASKED_BIT_ENABLE(CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT);
|
|
i915_reg_t last_reg = _MMIO(0);
|
|
struct render_mmio *mmio;
|
|
u32 v;
|
|
int i, array_size;
|
|
|
|
if (IS_SKYLAKE(vgpu->gvt->dev_priv)
|
|
|| IS_KABYLAKE(vgpu->gvt->dev_priv)) {
|
|
mmio = gen9_render_mmio_list;
|
|
array_size = ARRAY_SIZE(gen9_render_mmio_list);
|
|
load_mocs(vgpu, ring_id);
|
|
} else {
|
|
mmio = gen8_render_mmio_list;
|
|
array_size = ARRAY_SIZE(gen8_render_mmio_list);
|
|
}
|
|
|
|
for (i = 0; i < array_size; i++, mmio++) {
|
|
if (mmio->ring_id != ring_id)
|
|
continue;
|
|
|
|
mmio->value = I915_READ_FW(mmio->reg);
|
|
|
|
/*
|
|
* if it is an inhibit context, load in_context mmio
|
|
* into HW by mmio write. If it is not, skip this mmio
|
|
* write.
|
|
*/
|
|
if (mmio->in_context &&
|
|
((ctx_ctrl & inhibit_mask) != inhibit_mask) &&
|
|
i915_modparams.enable_execlists)
|
|
continue;
|
|
|
|
if (mmio->mask)
|
|
v = vgpu_vreg(vgpu, mmio->reg) | (mmio->mask << 16);
|
|
else
|
|
v = vgpu_vreg(vgpu, mmio->reg);
|
|
|
|
I915_WRITE_FW(mmio->reg, v);
|
|
last_reg = mmio->reg;
|
|
|
|
trace_render_mmio(vgpu->id, "load",
|
|
i915_mmio_reg_offset(mmio->reg),
|
|
mmio->value, v);
|
|
}
|
|
|
|
/* Make sure the swiched MMIOs has taken effect. */
|
|
if (likely(INTEL_GVT_MMIO_OFFSET(last_reg)))
|
|
I915_READ_FW(last_reg);
|
|
|
|
handle_tlb_pending_event(vgpu, ring_id);
|
|
}
|
|
|
|
/* Switch ring mmio values (context) from vgpu to host. */
|
|
static void switch_mmio_to_host(struct intel_vgpu *vgpu, int ring_id)
|
|
{
|
|
struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
|
|
struct render_mmio *mmio;
|
|
i915_reg_t last_reg = _MMIO(0);
|
|
u32 v;
|
|
int i, array_size;
|
|
|
|
if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
|
|
mmio = gen9_render_mmio_list;
|
|
array_size = ARRAY_SIZE(gen9_render_mmio_list);
|
|
restore_mocs(vgpu, ring_id);
|
|
} else {
|
|
mmio = gen8_render_mmio_list;
|
|
array_size = ARRAY_SIZE(gen8_render_mmio_list);
|
|
}
|
|
|
|
for (i = 0; i < array_size; i++, mmio++) {
|
|
if (mmio->ring_id != ring_id)
|
|
continue;
|
|
|
|
vgpu_vreg(vgpu, mmio->reg) = I915_READ_FW(mmio->reg);
|
|
|
|
if (mmio->mask) {
|
|
vgpu_vreg(vgpu, mmio->reg) &= ~(mmio->mask << 16);
|
|
v = mmio->value | (mmio->mask << 16);
|
|
} else
|
|
v = mmio->value;
|
|
|
|
if (mmio->in_context)
|
|
continue;
|
|
|
|
I915_WRITE_FW(mmio->reg, v);
|
|
last_reg = mmio->reg;
|
|
|
|
trace_render_mmio(vgpu->id, "restore",
|
|
i915_mmio_reg_offset(mmio->reg),
|
|
mmio->value, v);
|
|
}
|
|
|
|
/* Make sure the swiched MMIOs has taken effect. */
|
|
if (likely(INTEL_GVT_MMIO_OFFSET(last_reg)))
|
|
I915_READ_FW(last_reg);
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
|
|
/**
|
|
* TODO: Optimize for vGPU to vGPU switch by merging
|
|
* switch_mmio_to_host() and switch_mmio_to_vgpu().
|
|
*/
|
|
if (pre)
|
|
switch_mmio_to_host(pre, ring_id);
|
|
|
|
if (next)
|
|
switch_mmio_to_vgpu(next, ring_id);
|
|
|
|
intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
|
|
}
|