[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 09:31:49 UTC 2022
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
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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