[RFC] drm/i915: Split out intel_vtd_active and run_as_guest to own header
Jani Nikula
jani.nikula at intel.com
Thu Mar 24 11:57:37 UTC 2022
On Thu, 24 Mar 2022, Tvrtko Ursulin <tvrtko.ursulin at linux.intel.com> wrote:
> On 24/03/2022 09:31, Jani Nikula wrote:
>> On Tue, 22 Mar 2022, Tvrtko Ursulin <tvrtko.ursulin at linux.intel.com> wrote:
>>> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
>>>
>>> ...
>>>
>>> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
>>> Cc: Jani Nikula <jani.nikula at intel.com>
>>> Cc: Lucas De Marchi <lucas.demarchi at intel.com>
>>> ---
>>> Typed up how I see it - bash away.
>>
>> So is intel_vtd_active() so performance critical that it needs to be
>> inline?
>>
>> We're passing struct drm_i915_private * everywhere we can, and it just
>> feels silly to use struct drm_device * to avoid the include.
>>
>> Static inlines considered harmful. :p
>
> Same as it is ;), and gee, who was it that he said he was just trying to
> declutter i915_drv.h.. ;p
Not at the cost of clarity elsewhere!
>
> Regards,
>
> Tvrtko
>
>>
>> BR,
>> Jani.
>>
>>
>>> ---
>>> drivers/gpu/drm/i915/display/intel_bw.c | 3 +-
>>> drivers/gpu/drm/i915/display/intel_display.c | 9 ++++-
>>> drivers/gpu/drm/i915/display/intel_display.h | 2 ++
>>> drivers/gpu/drm/i915/display/intel_fbc.c | 3 +-
>>> drivers/gpu/drm/i915/gem/i915_gem_stolen.c | 3 +-
>>> drivers/gpu/drm/i915/gem/i915_gemfs.c | 3 +-
>>> drivers/gpu/drm/i915/gt/intel_ggtt.c | 5 +--
>>> drivers/gpu/drm/i915/gt/intel_gtt.c | 12 +++++++
>>> drivers/gpu/drm/i915/gt/intel_gtt.h | 2 ++
>>> drivers/gpu/drm/i915/i915_debugfs.c | 1 +
>>> drivers/gpu/drm/i915/i915_driver.c | 3 +-
>>> drivers/gpu/drm/i915/i915_driver.h | 4 +++
>>> drivers/gpu/drm/i915/i915_drv.h | 37 --------------------
>>> drivers/gpu/drm/i915/i915_gpu_error.c | 3 +-
>>> drivers/gpu/drm/i915/intel_device_info.c | 4 ++-
>>> drivers/gpu/drm/i915/intel_pch.c | 3 +-
>>> drivers/gpu/drm/i915/intel_vtd.h | 27 ++++++++++++++
>>> 17 files changed, 76 insertions(+), 48 deletions(-)
>>> create mode 100644 drivers/gpu/drm/i915/intel_vtd.h
>>>
>>> diff --git a/drivers/gpu/drm/i915/display/intel_bw.c b/drivers/gpu/drm/i915/display/intel_bw.c
>>> index ac11ff19e47d..6c9cb4f97218 100644
>>> --- a/drivers/gpu/drm/i915/display/intel_bw.c
>>> +++ b/drivers/gpu/drm/i915/display/intel_bw.c
>>> @@ -13,6 +13,7 @@
>>> #include "intel_mchbar_regs.h"
>>> #include "intel_pcode.h"
>>> #include "intel_pm.h"
>>> +#include "intel_vtd.h"
>>>
>>> /* Parameters for Qclk Geyserville (QGV) */
>>> struct intel_qgv_point {
>>> @@ -649,7 +650,7 @@ static unsigned int intel_bw_data_rate(struct drm_i915_private *dev_priv,
>>> for_each_pipe(dev_priv, pipe)
>>> data_rate += bw_state->data_rate[pipe];
>>>
>>> - if (DISPLAY_VER(dev_priv) >= 13 && intel_vtd_active(dev_priv))
>>> + if (DISPLAY_VER(dev_priv) >= 13 && intel_vtd_active(dev_priv->drm.dev))
>>> data_rate = DIV_ROUND_UP(data_rate * 105, 100);
>>>
>>> return data_rate;
>>> diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
>>> index dc6e21e4ef0b..e80f3ca3ee4e 100644
>>> --- a/drivers/gpu/drm/i915/display/intel_display.c
>>> +++ b/drivers/gpu/drm/i915/display/intel_display.c
>>> @@ -110,6 +110,7 @@
>>> #include "intel_quirks.h"
>>> #include "intel_sprite.h"
>>> #include "intel_tc.h"
>>> +#include "intel_vtd.h"
>>> #include "intel_vga.h"
>>> #include "i9xx_plane.h"
>>> #include "skl_scaler.h"
>>> @@ -1197,7 +1198,7 @@ static bool needs_async_flip_vtd_wa(const struct intel_crtc_state *crtc_state)
>>> {
>>> struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
>>>
>>> - return crtc_state->uapi.async_flip && intel_vtd_active(i915) &&
>>> + return crtc_state->uapi.async_flip && intel_vtd_active(i915->drm.dev) &&
>>> (DISPLAY_VER(i915) == 9 || IS_BROADWELL(i915) || IS_HASWELL(i915));
>>> }
>>>
>>> @@ -10699,3 +10700,9 @@ void intel_display_driver_unregister(struct drm_i915_private *i915)
>>> acpi_video_unregister();
>>> intel_opregion_unregister(i915);
>>> }
>>> +
>>> +bool intel_scanout_needs_vtd_wa(struct drm_i915_private *dev_priv)
>>> +{
>>> + return DISPLAY_VER(dev_priv) >= 6 &&
>>> + intel_vtd_active(dev_priv->drm.dev);
>>> +}
>>> diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h
>>> index 8513703086b7..d69587c76e71 100644
>>> --- a/drivers/gpu/drm/i915/display/intel_display.h
>>> +++ b/drivers/gpu/drm/i915/display/intel_display.h
>>> @@ -694,4 +694,6 @@ void assert_transcoder(struct drm_i915_private *dev_priv,
>>> #define I915_STATE_WARN_ON(x) \
>>> I915_STATE_WARN((x), "%s", "WARN_ON(" __stringify(x) ")")
>>>
>>> +bool intel_scanout_needs_vtd_wa(struct drm_i915_private *dev_priv);
>>> +
>>> #endif
>>> diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
>>> index 142280b6ce6d..00a3e30587a5 100644
>>> --- a/drivers/gpu/drm/i915/display/intel_fbc.c
>>> +++ b/drivers/gpu/drm/i915/display/intel_fbc.c
>>> @@ -50,6 +50,7 @@
>>> #include "intel_display_types.h"
>>> #include "intel_fbc.h"
>>> #include "intel_frontbuffer.h"
>>> +#include "intel_vtd.h"
>>>
>>> #define for_each_fbc_id(__dev_priv, __fbc_id) \
>>> for ((__fbc_id) = INTEL_FBC_A; (__fbc_id) < I915_MAX_FBCS; (__fbc_id)++) \
>>> @@ -1643,7 +1644,7 @@ static int intel_sanitize_fbc_option(struct drm_i915_private *i915)
>>> static bool need_fbc_vtd_wa(struct drm_i915_private *i915)
>>> {
>>> /* WaFbcTurnOffFbcWhenHyperVisorIsUsed:skl,bxt */
>>> - if (intel_vtd_active(i915) &&
>>> + if (intel_vtd_active(i915->drm.dev) &&
>>> (IS_SKYLAKE(i915) || IS_BROXTON(i915))) {
>>> drm_info(&i915->drm,
>>> "Disabling framebuffer compression (FBC) to prevent screen flicker with VT-d enabled\n");
>>> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
>>> index 143f61aaa867..9b986b1b0b60 100644
>>> --- a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
>>> +++ b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
>>> @@ -19,6 +19,7 @@
>>> #include "i915_reg.h"
>>> #include "i915_vgpu.h"
>>> #include "intel_mchbar_regs.h"
>>> +#include "intel_vtd.h"
>>>
>>> /*
>>> * The BIOS typically reserves some of the system's memory for the exclusive
>>> @@ -403,7 +404,7 @@ static int i915_gem_init_stolen(struct intel_memory_region *mem)
>>> return 0;
>>> }
>>>
>>> - if (intel_vtd_active(i915) && GRAPHICS_VER(i915) < 8) {
>>> + if (intel_vtd_active(i915->drm.dev) && GRAPHICS_VER(i915) < 8) {
>>> drm_notice(&i915->drm,
>>> "%s, disabling use of stolen memory\n",
>>> "DMAR active");
>>> diff --git a/drivers/gpu/drm/i915/gem/i915_gemfs.c b/drivers/gpu/drm/i915/gem/i915_gemfs.c
>>> index 7271fbf813fa..271826642bd4 100644
>>> --- a/drivers/gpu/drm/i915/gem/i915_gemfs.c
>>> +++ b/drivers/gpu/drm/i915/gem/i915_gemfs.c
>>> @@ -9,6 +9,7 @@
>>>
>>> #include "i915_drv.h"
>>> #include "i915_gemfs.h"
>>> +#include "intel_vtd.h"
>>>
>>> int i915_gemfs_init(struct drm_i915_private *i915)
>>> {
>>> @@ -32,7 +33,7 @@ int i915_gemfs_init(struct drm_i915_private *i915)
>>> */
>>>
>>> opts = NULL;
>>> - if (intel_vtd_active(i915)) {
>>> + if (intel_vtd_active(i915->drm.dev)) {
>>> if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE)) {
>>> opts = huge_opt;
>>> drm_info(&i915->drm,
>>> diff --git a/drivers/gpu/drm/i915/gt/intel_ggtt.c b/drivers/gpu/drm/i915/gt/intel_ggtt.c
>>> index 04191fe2ee34..386181cec300 100644
>>> --- a/drivers/gpu/drm/i915/gt/intel_ggtt.c
>>> +++ b/drivers/gpu/drm/i915/gt/intel_ggtt.c
>>> @@ -21,6 +21,7 @@
>>> #include "i915_vgpu.h"
>>>
>>> #include "intel_gtt.h"
>>> +#include "intel_vtd.h"
>>> #include "gen8_ppgtt.h"
>>>
>>> static void i915_ggtt_color_adjust(const struct drm_mm_node *node,
>>> @@ -104,7 +105,7 @@ static bool needs_idle_maps(struct drm_i915_private *i915)
>>> * Query intel_iommu to see if we need the workaround. Presumably that
>>> * was loaded first.
>>> */
>>> - if (!intel_vtd_active(i915))
>>> + if (!intel_vtd_active(i915->drm.dev))
>>> return false;
>>>
>>> if (GRAPHICS_VER(i915) == 5 && IS_MOBILE(i915))
>>> @@ -1258,7 +1259,7 @@ int i915_ggtt_probe_hw(struct drm_i915_private *i915)
>>> if (ret)
>>> return ret;
>>>
>>> - if (intel_vtd_active(i915))
>>> + if (intel_vtd_active(i915->drm.dev))
>>> drm_info(&i915->drm, "VT-d active for gfx access\n");
>>>
>>> return 0;
>>> diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.c b/drivers/gpu/drm/i915/gt/intel_gtt.c
>>> index aed6de2d5a79..ee17e987cddc 100644
>>> --- a/drivers/gpu/drm/i915/gt/intel_gtt.c
>>> +++ b/drivers/gpu/drm/i915/gt/intel_gtt.c
>>> @@ -16,6 +16,18 @@
>>> #include "intel_gt.h"
>>> #include "intel_gt_regs.h"
>>> #include "intel_gtt.h"
>>> +#include "intel_vtd.h"
>>> +
>>> +
>>> +static bool intel_ggtt_update_needs_vtd_wa(struct drm_i915_private *i915)
>>> +{
>>> + return IS_BROXTON(i915) && intel_vtd_active(i915->drm.dev);
>>> +}
>>> +
>>> +bool intel_vm_no_concurrent_access_wa(struct drm_i915_private *i915)
>>> +{
>>> + return IS_CHERRYVIEW(i915) || intel_ggtt_update_needs_vtd_wa(i915);
>>> +}
>>>
>>> struct drm_i915_gem_object *alloc_pt_lmem(struct i915_address_space *vm, int sz)
>>> {
>>> diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.h b/drivers/gpu/drm/i915/gt/intel_gtt.h
>>> index 4529b5e9f6e6..5922e2cf4d8d 100644
>>> --- a/drivers/gpu/drm/i915/gt/intel_gtt.h
>>> +++ b/drivers/gpu/drm/i915/gt/intel_gtt.h
>>> @@ -382,6 +382,8 @@ struct i915_ppgtt {
>>> #define i915_is_dpt(vm) ((vm)->is_dpt)
>>> #define i915_is_ggtt_or_dpt(vm) (i915_is_ggtt(vm) || i915_is_dpt(vm))
>>>
>>> +bool intel_vm_no_concurrent_access_wa(struct drm_i915_private *i915);
>>> +
>>> int __must_check
>>> i915_vm_lock_objects(struct i915_address_space *vm, struct i915_gem_ww_ctx *ww);
>>>
>>> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
>>> index 2cbd1f58e754..cda71457d630 100644
>>> --- a/drivers/gpu/drm/i915/i915_debugfs.c
>>> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
>>> @@ -48,6 +48,7 @@
>>>
>>> #include "i915_debugfs.h"
>>> #include "i915_debugfs_params.h"
>>> +#include "i915_driver.h"
>>> #include "i915_irq.h"
>>> #include "i915_scheduler.h"
>>> #include "intel_mchbar_regs.h"
>>> diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c
>>> index 64e6f76861f9..f03a63b57f05 100644
>>> --- a/drivers/gpu/drm/i915/i915_driver.c
>>> +++ b/drivers/gpu/drm/i915/i915_driver.c
>>> @@ -96,6 +96,7 @@
>>> #include "intel_pcode.h"
>>> #include "intel_pm.h"
>>> #include "intel_region_ttm.h"
>>> +#include "intel_vtd.h"
>>> #include "vlv_suspend.h"
>>>
>>> static const struct drm_driver i915_drm_driver;
>>> @@ -744,7 +745,7 @@ void
>>> i915_print_iommu_status(struct drm_i915_private *i915, struct drm_printer *p)
>>> {
>>> drm_printf(p, "iommu: %s\n",
>>> - str_enabled_disabled(intel_vtd_active(i915)));
>>> + str_enabled_disabled(intel_vtd_active(i915->drm.dev)));
>>> }
>>>
>>> static void i915_welcome_messages(struct drm_i915_private *dev_priv)
>>> diff --git a/drivers/gpu/drm/i915/i915_driver.h b/drivers/gpu/drm/i915/i915_driver.h
>>> index 9d11de65daaf..44ec543d92cb 100644
>>> --- a/drivers/gpu/drm/i915/i915_driver.h
>>> +++ b/drivers/gpu/drm/i915/i915_driver.h
>>> @@ -11,6 +11,7 @@
>>> struct pci_dev;
>>> struct pci_device_id;
>>> struct drm_i915_private;
>>> +struct drm_printer;
>>>
>>> #define DRIVER_NAME "i915"
>>> #define DRIVER_DESC "Intel Graphics"
>>> @@ -26,4 +27,7 @@ void i915_driver_shutdown(struct drm_i915_private *i915);
>>> int i915_driver_resume_switcheroo(struct drm_i915_private *i915);
>>> int i915_driver_suspend_switcheroo(struct drm_i915_private *i915, pm_message_t state);
>>>
>>> +void
>>> +i915_print_iommu_status(struct drm_i915_private *i915, struct drm_printer *p);
>>> +
>>> #endif /* __I915_DRIVER_H__ */
>>> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
>>> index 217c09422711..799f386a7ef2 100644
>>> --- a/drivers/gpu/drm/i915/i915_drv.h
>>> +++ b/drivers/gpu/drm/i915/i915_drv.h
>>> @@ -32,9 +32,6 @@
>>>
>>> #include <uapi/drm/i915_drm.h>
>>>
>>> -#include <asm/hypervisor.h>
>>> -
>>> -#include <linux/intel-iommu.h>
>>> #include <linux/pm_qos.h>
>>>
>>> #include <drm/drm_connector.h>
>>> @@ -1387,43 +1384,9 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915,
>>> #define HAS_PERCTX_PREEMPT_CTRL(i915) \
>>> ((GRAPHICS_VER(i915) >= 9) && GRAPHICS_VER_FULL(i915) < IP_VER(12, 55))
>>>
>>> -static inline bool run_as_guest(void)
>>> -{
>>> - return !hypervisor_is_type(X86_HYPER_NATIVE);
>>> -}
>>> -
>>> #define HAS_D12_PLANE_MINIMIZATION(dev_priv) (IS_ROCKETLAKE(dev_priv) || \
>>> IS_ALDERLAKE_S(dev_priv))
>>>
>>> -static inline bool intel_vtd_active(struct drm_i915_private *i915)
>>> -{
>>> - if (device_iommu_mapped(i915->drm.dev))
>>> - return true;
>>> -
>>> - /* Running as a guest, we assume the host is enforcing VT'd */
>>> - return run_as_guest();
>>> -}
>>> -
>>> -void
>>> -i915_print_iommu_status(struct drm_i915_private *i915, struct drm_printer *p);
>>> -
>>> -static inline bool intel_scanout_needs_vtd_wa(struct drm_i915_private *dev_priv)
>>> -{
>>> - return DISPLAY_VER(dev_priv) >= 6 && intel_vtd_active(dev_priv);
>>> -}
>>> -
>>> -static inline bool
>>> -intel_ggtt_update_needs_vtd_wa(struct drm_i915_private *i915)
>>> -{
>>> - return IS_BROXTON(i915) && intel_vtd_active(i915);
>>> -}
>>> -
>>> -static inline bool
>>> -intel_vm_no_concurrent_access_wa(struct drm_i915_private *i915)
>>> -{
>>> - return IS_CHERRYVIEW(i915) || intel_ggtt_update_needs_vtd_wa(i915);
>>> -}
>>> -
>>> /* i915_gem.c */
>>> void i915_gem_init_early(struct drm_i915_private *dev_priv);
>>> void i915_gem_cleanup_early(struct drm_i915_private *dev_priv);
>>> diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
>>> index a8acc6fbb299..a221b19e588c 100644
>>> --- a/drivers/gpu/drm/i915/i915_gpu_error.c
>>> +++ b/drivers/gpu/drm/i915/i915_gpu_error.c
>>> @@ -48,6 +48,7 @@
>>> #include "gt/intel_gt.h"
>>> #include "gt/intel_gt_pm.h"
>>> #include "gt/intel_gt_regs.h"
>>> +#include "intel_vtd.h"
>>>
>>> #include "i915_driver.h"
>>> #include "i915_drv.h"
>>> @@ -1814,7 +1815,7 @@ static void capture_gen(struct i915_gpu_coredump *error)
>>> error->wakelock = atomic_read(&i915->runtime_pm.wakeref_count);
>>> error->suspended = i915->runtime_pm.suspended;
>>>
>>> - error->iommu = intel_vtd_active(i915);
>>> + error->iommu = intel_vtd_active(i915->drm.dev);
>>> error->reset_count = i915_reset_count(&i915->gpu_error);
>>> error->suspend_count = i915->suspend_count;
>>>
>>> diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c
>>> index 8d458226f478..21423e6eacb3 100644
>>> --- a/drivers/gpu/drm/i915/intel_device_info.c
>>> +++ b/drivers/gpu/drm/i915/intel_device_info.c
>>> @@ -30,6 +30,7 @@
>>> #include "display/intel_cdclk.h"
>>> #include "display/intel_de.h"
>>> #include "intel_device_info.h"
>>> +#include "intel_vtd.h"
>>> #include "i915_drv.h"
>>>
>>> #define PLATFORM_NAME(x) [INTEL_##x] = #x
>>> @@ -389,7 +390,8 @@ void intel_device_info_runtime_init(struct drm_i915_private *dev_priv)
>>> info->display.has_dsc = 0;
>>> }
>>>
>>> - if (GRAPHICS_VER(dev_priv) == 6 && intel_vtd_active(dev_priv)) {
>>> + if (GRAPHICS_VER(dev_priv) == 6 &&
>>> + intel_vtd_active(dev_priv->drm.dev)) {
>>> drm_info(&dev_priv->drm,
>>> "Disabling ppGTT for VT-d support\n");
>>> info->ppgtt_type = INTEL_PPGTT_NONE;
>>> diff --git a/drivers/gpu/drm/i915/intel_pch.c b/drivers/gpu/drm/i915/intel_pch.c
>>> index 4cce044efde2..c232343d5ba7 100644
>>> --- a/drivers/gpu/drm/i915/intel_pch.c
>>> +++ b/drivers/gpu/drm/i915/intel_pch.c
>>> @@ -5,6 +5,7 @@
>>>
>>> #include "i915_drv.h"
>>> #include "intel_pch.h"
>>> +#include "intel_vtd.h"
>>>
>>> /* Map PCH device id to PCH type, or PCH_NONE if unknown. */
>>> static enum intel_pch
>>> @@ -256,7 +257,7 @@ void intel_detect_pch(struct drm_i915_private *dev_priv)
>>> dev_priv->pch_type = PCH_NOP;
>>> dev_priv->pch_id = 0;
>>> } else if (!pch) {
>>> - if (run_as_guest() && HAS_DISPLAY(dev_priv)) {
>>> + if (intel_vtd_run_as_guest() && HAS_DISPLAY(dev_priv)) {
>>> intel_virt_detect_pch(dev_priv, &id, &pch_type);
>>> dev_priv->pch_type = pch_type;
>>> dev_priv->pch_id = id;
>>> diff --git a/drivers/gpu/drm/i915/intel_vtd.h b/drivers/gpu/drm/i915/intel_vtd.h
>>> new file mode 100644
>>> index 000000000000..1aa5d813f002
>>> --- /dev/null
>>> +++ b/drivers/gpu/drm/i915/intel_vtd.h
>>> @@ -0,0 +1,27 @@
>>> +/* SPDX-License-Identifier: MIT */
>>> +/*
>>> + * Copyright © 2022 Intel Corporation
>>> + */
>>> +
>>> +#ifndef __INTEL_VTD_H__
>>> +#define __INTEL_VTD_H__
>>> +
>>> +#include <linux/device.h>
>>> +#include <linux/types.h>
>>> +#include <asm/hypervisor.h>
>>> +
>>> +static inline bool intel_vtd_run_as_guest(void)
>>> +{
>>> + return !hypervisor_is_type(X86_HYPER_NATIVE);
>>> +}
>>> +
>>> +static inline bool intel_vtd_active(struct device *dev)
>>> +{
>>> + if (device_iommu_mapped(dev))
>>> + return true;
>>> +
>>> + /* Running as a guest, we assume the host is enforcing VT'd */
>>> + return intel_vtd_run_as_guest();
>>> +}
>>> +
>>> +#endif /* __INTEL_VTD_H__ */
>>
--
Jani Nikula, Intel Open Source Graphics Center
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