[Intel-gfx] [PATCH v9 1/1] drm/i915/pxp: Promote pxp subsystem to top-level of i915
Tvrtko Ursulin
tvrtko.ursulin at linux.intel.com
Tue Dec 6 10:04:50 UTC 2022
On 06/12/2022 00:03, Alan Previn wrote:
> Starting with MTL, there will be two GT-tiles, a render and media
> tile. PXP as a service for supporting workloads with protected
> contexts and protected buffers can be subscribed by process
> workloads on any tile. However, depending on the platform,
> only one of the tiles is used for control events pertaining to PXP
> operation (such as creating the arbitration session and session
> tear-down).
>
> PXP as a global feature is accessible via batch buffer instructions
> on any engine/tile and the coherency across tiles is handled implicitly
> by the HW. In fact, for the foreseeable future, we are expecting this
> single-control-tile for the PXP subsystem.
>
> In MTL, it's the standalone media tile (not the root tile) because
> it contains the VDBOX and KCR engine (among the assets PXP relies on
> for those events).
>
> Looking at the current code design, each tile is represented by the
> intel_gt structure while the intel_pxp structure currently hangs off the
> intel_gt structure.
>
> Keeping the intel_pxp structure within the intel_gt structure makes some
> internal functionalities more straight forward but adds code complexity to
> code readibility and maintainibility to many external-to-pxp subsystems
> which may need to pick the correct intel_gt structure. An example of this
> would be the intel_pxp_is_active or intel_pxp_is_enabled functionality
> which should be viewed as a global level inquiry, not a per-gt inquiry.
>
> That said, this series promotes the intel_pxp structure into the
> drm_i915_private structure making it a top-level subsystem and the PXP
> subsystem will select the control gt internally and keep a pointer to
> it for internal reference.
>
> This promotion comes with two noteworthy changes:
>
> 1. Exported pxp functions that are called by external subsystems
> (such as intel_pxp_enabled/active) will have to check implicitly
> if i915->pxp is valid as that structure will not be allocated
> for HW that doesn't support PXP.
>
> 2. Since GT is now considered a soft-dependency of PXP we are
> ensuring that GT init happens before PXP init and vice versa
> for fini. This causes a minor ordering change whereby we previously
> called intel_pxp_suspend after intel_uc_suspend but now is before
> i915_gem_suspend_late but the change is required for correct
> dependency flows. Additionally, this re-order change doesn't
> have any impact because at that point in either case, the top level
> entry to i915 won't observe any PXP events (since the GPU was
> quiesced during suspend_prepare). Also, any PXP event doesn't
> really matter when we disable the PXP HW (global GT irqs are
> already off anyway, so even if there was a bug that generated
> spurious events we wouldn't see it and we would just clean it
> up on resume which is okay since the default fallback action
> for PXP would be to keep the sessions off at this suspend stage).
>
> Changes from prior revs:
> v8: - Remove pxp_to_gt macro (Daniele).
Okay I guess, conceptually, just a pity since it would have made the
diff smaller if kept.
> - Fix a bug in pxp_get_ctrl_gt for the case of MTL and we don't
> support GSC-FW on it. (Daniele).
> - Leave i915->pxp as NULL if we dont support PXP and in line
> with that, do additional validity check on i915->pxp for
> intel_pxp_is_supported/enabled/active (Daniele).
> - Remove unncessary include header from intel_gt_debugfs.c
> and check drm_minor i915->drm.primary (Daniele).
> - Other cosmetics / minor issues / more comments on suspend
> flow order change (Daniele).
> v7: - Drop i915_dev_to_pxp and in intel_pxp_init use 'i915->pxp'
> through out instead of local variable newpxp. (Rodrigo)
> - In the case intel_pxp_fini is called during driver unload but
> after i915 loading failed without pxp being allocated, check
> i915->pxp before referencing it. (Alan)
> v6: - Remove HAS_PXP macro and replace it with intel_pxp_is_supported
> because : [1] introduction of 'ctrl_gt' means we correct this
> for MTL's upcoming series now. [2] Also, this has little impact
> globally as its only used by PXP-internal callers at the moment.
> - Change intel_pxp_init/fini to take in i915 as its input to avoid
> ptr-to-ptr in init/fini calls.(Jani).
> - Remove the backpointer from pxp->i915 since we can use
> pxp->ctrl_gt->i915 if we need it. (Rodrigo).
> v5: - Switch from series to single patch (Rodrigo).
> - change function name from pxp_get_kcr_owner_gt to
> pxp_get_ctrl_gt.
> - Fix CI BAT failure by removing redundant call to intel_pxp_fini
> from driver-remove.
> - NOTE: remaining open still persists on using ptr-to-ptr
> and back-ptr.
> v4: - Instead of maintaining intel_pxp as an intel_gt structure member
> and creating a number of convoluted helpers that takes in i915 as
> input and redirects to the correct intel_gt or takes any intel_gt
> and internally replaces with the correct intel_gt, promote it to
> be a top-level i915 structure.
> v3: - Rename gt level helper functions to "intel_pxp_is_enabled/
> supported/ active_on_gt" (Daniele)
> - Upgrade _gt_supports_pxp to replace what was intel_gtpxp_is
> supported as the new intel_pxp_is_supported_on_gt to check for
> PXP feature support vs the tee support for huc authentication.
> Fix pxp-debugfs-registration to use only the former to decide
> support. (Daniele)
> - Couple minor optimizations.
> v2: - Avoid introduction of new device info or gt variables and use
> existing checks / macros to differentiate the correct GT->PXP
> control ownership (Daniele Ceraolo Spurio)
> - Don't reuse the updated global-checkers for per-GT callers (such
> as other files within PXP) to avoid unnecessary GT-reparsing,
> expose a replacement helper like the prior ones. (Daniele).
> v1: - Add one more patch to the series for the intel_pxp suspend/resume
> for similar refactoring
>
> References: https://patchwork.freedesktop.org/patch/msgid/20221202011407.4068371-1-alan.previn.teres.alexis@intel.com
> Signed-off-by: Alan Previn <alan.previn.teres.alexis at intel.com>
> ---
> .../drm/i915/display/skl_universal_plane.c | 2 +-
> drivers/gpu/drm/i915/gem/i915_gem_context.c | 6 +-
> drivers/gpu/drm/i915/gem/i915_gem_create.c | 2 +-
> .../gpu/drm/i915/gem/i915_gem_execbuffer.c | 2 +-
> drivers/gpu/drm/i915/gt/intel_gt.c | 5 -
> drivers/gpu/drm/i915/gt/intel_gt_debugfs.c | 2 -
> drivers/gpu/drm/i915/gt/intel_gt_irq.c | 2 +-
> drivers/gpu/drm/i915/gt/intel_gt_pm.c | 8 --
> drivers/gpu/drm/i915/gt/intel_gt_types.h | 3 -
> drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c | 2 +-
> drivers/gpu/drm/i915/i915_driver.c | 18 ++++
> drivers/gpu/drm/i915/i915_drv.h | 7 +-
> drivers/gpu/drm/i915/pxp/intel_pxp.c | 94 ++++++++++++++-----
> drivers/gpu/drm/i915/pxp/intel_pxp.h | 9 +-
> drivers/gpu/drm/i915/pxp/intel_pxp_cmd.c | 8 +-
> drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c | 47 +++++++---
> drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.h | 4 +-
> drivers/gpu/drm/i915/pxp/intel_pxp_huc.c | 2 +-
> drivers/gpu/drm/i915/pxp/intel_pxp_irq.c | 16 ++--
> drivers/gpu/drm/i915/pxp/intel_pxp_pm.c | 6 +-
> drivers/gpu/drm/i915/pxp/intel_pxp_session.c | 10 +-
> drivers/gpu/drm/i915/pxp/intel_pxp_tee.c | 31 +++---
> drivers/gpu/drm/i915/pxp/intel_pxp_types.h | 8 ++
> 23 files changed, 184 insertions(+), 110 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/skl_universal_plane.c b/drivers/gpu/drm/i915/display/skl_universal_plane.c
> index 76490cc59d8f..4b79c2d2d617 100644
> --- a/drivers/gpu/drm/i915/display/skl_universal_plane.c
> +++ b/drivers/gpu/drm/i915/display/skl_universal_plane.c
> @@ -1848,7 +1848,7 @@ static bool bo_has_valid_encryption(struct drm_i915_gem_object *obj)
> {
> struct drm_i915_private *i915 = to_i915(obj->base.dev);
>
> - return intel_pxp_key_check(&to_gt(i915)->pxp, obj, false) == 0;
> + return intel_pxp_key_check(i915->pxp, obj, false) == 0;
> }
>
> static bool pxp_is_borked(struct drm_i915_gem_object *obj)
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c
> index 7f2831efc798..46e71f62fcec 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
> @@ -257,7 +257,7 @@ static int proto_context_set_protected(struct drm_i915_private *i915,
>
> if (!protected) {
> pc->uses_protected_content = false;
> - } else if (!intel_pxp_is_enabled(&to_gt(i915)->pxp)) {
> + } else if (!intel_pxp_is_enabled(i915->pxp)) {
> ret = -ENODEV;
> } else if ((pc->user_flags & BIT(UCONTEXT_RECOVERABLE)) ||
> !(pc->user_flags & BIT(UCONTEXT_BANNABLE))) {
> @@ -271,8 +271,8 @@ static int proto_context_set_protected(struct drm_i915_private *i915,
> */
> pc->pxp_wakeref = intel_runtime_pm_get(&i915->runtime_pm);
>
> - if (!intel_pxp_is_active(&to_gt(i915)->pxp))
> - ret = intel_pxp_start(&to_gt(i915)->pxp);
> + if (!intel_pxp_is_active(i915->pxp))
> + ret = intel_pxp_start(i915->pxp);
> }
>
> return ret;
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_create.c b/drivers/gpu/drm/i915/gem/i915_gem_create.c
> index 33673fe7ee0a..005a7f842784 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_create.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_create.c
> @@ -384,7 +384,7 @@ static int ext_set_protected(struct i915_user_extension __user *base, void *data
> if (ext.flags)
> return -EINVAL;
>
> - if (!intel_pxp_is_enabled(&to_gt(ext_data->i915)->pxp))
> + if (!intel_pxp_is_enabled(ext_data->i915->pxp))
> return -ENODEV;
>
> ext_data->flags |= I915_BO_PROTECTED;
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
> index 29e9e8d5b6fe..2ea49bc21ed3 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
> @@ -869,7 +869,7 @@ static struct i915_vma *eb_lookup_vma(struct i915_execbuffer *eb, u32 handle)
> */
> if (i915_gem_context_uses_protected_content(eb->gem_context) &&
> i915_gem_object_is_protected(obj)) {
> - err = intel_pxp_key_check(&vm->gt->pxp, obj, true);
> + err = intel_pxp_key_check(eb->i915->pxp, obj, true);
> if (err) {
> i915_gem_object_put(obj);
> return ERR_PTR(err);
> diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c
> index d114347c004e..28278cc607e7 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gt.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gt.c
> @@ -8,7 +8,6 @@
>
> #include "gem/i915_gem_internal.h"
> #include "gem/i915_gem_lmem.h"
> -#include "pxp/intel_pxp.h"
>
> #include "i915_drv.h"
> #include "i915_perf_oa_regs.h"
> @@ -762,8 +761,6 @@ int intel_gt_init(struct intel_gt *gt)
>
> intel_migrate_init(>->migrate, gt);
>
> - intel_pxp_init(>->pxp);
> -
> goto out_fw;
> err_gt:
> __intel_gt_disable(gt);
> @@ -803,8 +800,6 @@ void intel_gt_driver_unregister(struct intel_gt *gt)
> intel_rps_driver_unregister(>->rps);
> intel_gsc_fini(>->gsc);
>
> - intel_pxp_fini(>->pxp);
> -
> /*
> * Upon unregistering the device to prevent any new users, cancel
> * all in-flight requests so that we can quickly unbind the active
> diff --git a/drivers/gpu/drm/i915/gt/intel_gt_debugfs.c b/drivers/gpu/drm/i915/gt/intel_gt_debugfs.c
> index dd53641f3637..5fc2df01aa0d 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gt_debugfs.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gt_debugfs.c
> @@ -12,7 +12,6 @@
> #include "intel_gt_mcr.h"
> #include "intel_gt_pm_debugfs.h"
> #include "intel_sseu_debugfs.h"
> -#include "pxp/intel_pxp_debugfs.h"
> #include "uc/intel_uc_debugfs.h"
>
> int intel_gt_debugfs_reset_show(struct intel_gt *gt, u64 *val)
> @@ -99,7 +98,6 @@ void intel_gt_debugfs_register(struct intel_gt *gt)
> intel_sseu_debugfs_register(gt, root);
>
> intel_uc_debugfs_register(>->uc, root);
> - intel_pxp_debugfs_register(>->pxp, root);
> }
>
> void intel_gt_debugfs_register_files(struct dentry *root,
> diff --git a/drivers/gpu/drm/i915/gt/intel_gt_irq.c b/drivers/gpu/drm/i915/gt/intel_gt_irq.c
> index 6f6b9e04d916..8fac2660e16b 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gt_irq.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gt_irq.c
> @@ -76,7 +76,7 @@ gen11_other_irq_handler(struct intel_gt *gt, const u8 instance,
> return gen11_rps_irq_handler(&media_gt->rps, iir);
>
> if (instance == OTHER_KCR_INSTANCE)
> - return intel_pxp_irq_handler(>->pxp, iir);
> + return intel_pxp_irq_handler(gt->i915->pxp, iir);
>
> if (instance == OTHER_GSC_INSTANCE)
> return intel_gsc_irq_handler(gt, iir);
> diff --git a/drivers/gpu/drm/i915/gt/intel_gt_pm.c b/drivers/gpu/drm/i915/gt/intel_gt_pm.c
> index 16db85fab0b1..c065950d0bad 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gt_pm.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gt_pm.c
> @@ -304,8 +304,6 @@ int intel_gt_resume(struct intel_gt *gt)
>
> intel_uc_resume(>->uc);
>
> - intel_pxp_resume(>->pxp);
> -
> user_forcewake(gt, false);
>
> out_fw:
> @@ -339,8 +337,6 @@ void intel_gt_suspend_prepare(struct intel_gt *gt)
> {
> user_forcewake(gt, true);
> wait_for_suspend(gt);
> -
> - intel_pxp_suspend_prepare(>->pxp);
> }
>
> static suspend_state_t pm_suspend_target(void)
> @@ -365,7 +361,6 @@ void intel_gt_suspend_late(struct intel_gt *gt)
> GEM_BUG_ON(gt->awake);
>
> intel_uc_suspend(>->uc);
> - intel_pxp_suspend(>->pxp);
>
> /*
> * On disabling the device, we want to turn off HW access to memory
> @@ -393,7 +388,6 @@ void intel_gt_suspend_late(struct intel_gt *gt)
>
> void intel_gt_runtime_suspend(struct intel_gt *gt)
> {
> - intel_pxp_runtime_suspend(>->pxp);
> intel_uc_runtime_suspend(>->uc);
>
> GT_TRACE(gt, "\n");
> @@ -411,8 +405,6 @@ int intel_gt_runtime_resume(struct intel_gt *gt)
> if (ret)
> return ret;
>
> - intel_pxp_runtime_resume(>->pxp);
> -
> return 0;
> }
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_gt_types.h b/drivers/gpu/drm/i915/gt/intel_gt_types.h
> index f519aa4a004a..0b6da2aa9718 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gt_types.h
> +++ b/drivers/gpu/drm/i915/gt/intel_gt_types.h
> @@ -30,7 +30,6 @@
> #include "intel_rps_types.h"
> #include "intel_migrate_types.h"
> #include "intel_wakeref.h"
> -#include "pxp/intel_pxp_types.h"
> #include "intel_wopcm.h"
>
> struct drm_i915_private;
> @@ -275,8 +274,6 @@ struct intel_gt {
> u8 wb_index; /* Only used on HAS_L3_CCS_READ() platforms */
> } mocs;
>
> - struct intel_pxp pxp;
> -
> /* gt/gtN sysfs */
> struct kobject sysfs_gt;
>
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c b/drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c
> index 4f246416db17..534b0aa43316 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c
> @@ -32,7 +32,7 @@ int intel_huc_fw_load_and_auth_via_gsc(struct intel_huc *huc)
>
> GEM_WARN_ON(intel_uc_fw_is_loaded(&huc->fw));
>
> - ret = intel_pxp_huc_load_and_auth(&huc_to_gt(huc)->pxp);
> + ret = intel_pxp_huc_load_and_auth(huc_to_gt(huc)->i915->pxp);
> if (ret)
> return ret;
>
> diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c
> index 4e1bb3c23c63..d716d12c7fc9 100644
> --- a/drivers/gpu/drm/i915/i915_driver.c
> +++ b/drivers/gpu/drm/i915/i915_driver.c
> @@ -73,6 +73,8 @@
> #include "gt/intel_gt_pm.h"
> #include "gt/intel_rc6.h"
>
> +#include "pxp/intel_pxp.h"
> +#include "pxp/intel_pxp_debugfs.h"
> #include "pxp/intel_pxp_pm.h"
>
> #include "i915_file_private.h"
> @@ -759,6 +761,8 @@ static void i915_driver_register(struct drm_i915_private *dev_priv)
> for_each_gt(gt, dev_priv, i)
> intel_gt_driver_register(gt);
>
> + intel_pxp_debugfs_register(dev_priv->pxp);
> +
> i915_hwmon_register(dev_priv);
>
> intel_display_driver_register(dev_priv);
> @@ -790,6 +794,8 @@ static void i915_driver_unregister(struct drm_i915_private *dev_priv)
>
> intel_display_driver_unregister(dev_priv);
>
> + intel_pxp_fini(dev_priv);
> +
> for_each_gt(gt, dev_priv, i)
> intel_gt_driver_unregister(gt);
>
> @@ -933,6 +939,8 @@ int i915_driver_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
> if (ret)
> goto out_cleanup_modeset2;
>
> + intel_pxp_init(i915);
> +
> ret = intel_modeset_init(i915);
> if (ret)
> goto out_cleanup_gem;
> @@ -1168,6 +1176,8 @@ static int i915_drm_prepare(struct drm_device *dev)
> {
> struct drm_i915_private *i915 = to_i915(dev);
>
> + intel_pxp_suspend_prepare(i915->pxp);
> +
> /*
> * NB intel_display_suspend() may issue new requests after we've
> * ostensibly marked the GPU as ready-to-sleep here. We need to
> @@ -1248,6 +1258,8 @@ static int i915_drm_suspend_late(struct drm_device *dev, bool hibernation)
>
> disable_rpm_wakeref_asserts(rpm);
>
> + intel_pxp_suspend(dev_priv->pxp);
> +
> i915_gem_suspend_late(dev_priv);
>
> for_each_gt(gt, dev_priv, i)
> @@ -1360,6 +1372,8 @@ static int i915_drm_resume(struct drm_device *dev)
>
> i915_gem_resume(dev_priv);
>
> + intel_pxp_resume(dev_priv->pxp);
> +
> intel_modeset_init_hw(dev_priv);
> intel_init_clock_gating(dev_priv);
> intel_hpd_init(dev_priv);
> @@ -1643,6 +1657,8 @@ static int intel_runtime_suspend(struct device *kdev)
> */
> i915_gem_runtime_suspend(dev_priv);
>
> + intel_pxp_runtime_suspend(dev_priv->pxp);
> +
> for_each_gt(gt, dev_priv, i)
> intel_gt_runtime_suspend(gt);
>
> @@ -1747,6 +1763,8 @@ static int intel_runtime_resume(struct device *kdev)
> for_each_gt(gt, dev_priv, i)
> intel_gt_runtime_resume(gt);
>
> + intel_pxp_runtime_resume(dev_priv->pxp);
> +
> /*
> * On VLV/CHV display interrupts are part of the display
> * power well, so hpd is reinitialized from there. For
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index a8a5bd426e78..7a4e9dc15b69 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -72,6 +72,7 @@ struct intel_encoder;
> struct intel_limit;
> struct intel_overlay_error_state;
> struct vlv_s0ix_state;
> +struct intel_pxp;
>
> #define I915_GEM_GPU_DOMAINS \
> (I915_GEM_DOMAIN_RENDER | \
> @@ -364,6 +365,8 @@ struct drm_i915_private {
> struct file *mmap_singleton;
> } gem;
>
> + struct intel_pxp *pxp;
> +
> u8 pch_ssc_use;
>
> /* For i915gm/i945gm vblank irq workaround */
> @@ -919,10 +922,6 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915,
>
> #define HAS_GLOBAL_MOCS_REGISTERS(dev_priv) (INTEL_INFO(dev_priv)->has_global_mocs)
>
> -#define HAS_PXP(dev_priv) ((IS_ENABLED(CONFIG_DRM_I915_PXP) && \
> - INTEL_INFO(dev_priv)->has_pxp) && \
> - VDBOX_MASK(to_gt(dev_priv)))
> -
> #define HAS_GMCH(dev_priv) (INTEL_INFO(dev_priv)->display.has_gmch)
>
> #define HAS_GMD_ID(i915) (INTEL_INFO(i915)->has_gmd_id)
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp.c b/drivers/gpu/drm/i915/pxp/intel_pxp.c
> index 5efe61f67546..cd863aa4c697 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp.c
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp.c
> @@ -3,13 +3,19 @@
> * Copyright(c) 2020 Intel Corporation.
> */
> #include <linux/workqueue.h>
> +
> +#include "gem/i915_gem_context.h"
> +
> +#include "gt/intel_context.h"
> +#include "gt/intel_gt.h"
> +
> +#include "i915_drv.h"
> +
> #include "intel_pxp.h"
> #include "intel_pxp_irq.h"
> #include "intel_pxp_session.h"
> #include "intel_pxp_tee.h"
> -#include "gem/i915_gem_context.h"
> -#include "gt/intel_context.h"
> -#include "i915_drv.h"
> +#include "intel_pxp_types.h"
>
> /**
> * DOC: PXP
> @@ -39,18 +45,26 @@
> * performed via the mei_pxp component module.
> */
>
> -struct intel_gt *pxp_to_gt(const struct intel_pxp *pxp)
> +bool intel_pxp_is_supported(const struct intel_pxp *pxp)
> {
> - return container_of(pxp, struct intel_gt, pxp);
> + if (!IS_ENABLED(CONFIG_DRM_I915_PXP))
> + return false;
> + else if (!pxp)
> + return false;
> + return (INTEL_INFO(pxp->ctrl_gt->i915)->has_pxp && VDBOX_MASK(pxp->ctrl_gt));
Intel_pxp_is_supported operating on the pxp reads a bit funny when one
of the checks is for NULL passed in object to start with.
And all callers pass in i915->pxp so my immediate thought is whether
i915_pxp_is_supported(i915) was considered?
> }
>
> bool intel_pxp_is_enabled(const struct intel_pxp *pxp)
> {
> + if (!pxp)
> + return false;
> return pxp->ce;
> }
>
> bool intel_pxp_is_active(const struct intel_pxp *pxp)
> {
> + if (!pxp)
> + return false;
> return pxp->arb_is_valid;
Ditto.
> }
>
> @@ -74,7 +88,7 @@ static void kcr_pxp_disable(struct intel_gt *gt)
> static int create_vcs_context(struct intel_pxp *pxp)
> {
> static struct lock_class_key pxp_lock;
> - struct intel_gt *gt = pxp_to_gt(pxp);
> + struct intel_gt *gt = pxp->ctrl_gt;
> struct intel_engine_cs *engine;
> struct intel_context *ce;
> int i;
> @@ -109,7 +123,7 @@ static void destroy_vcs_context(struct intel_pxp *pxp)
>
> static void pxp_init_full(struct intel_pxp *pxp)
> {
> - struct intel_gt *gt = pxp_to_gt(pxp);
> + struct intel_gt *gt = pxp->ctrl_gt;
> int ret;
>
> /*
> @@ -138,31 +152,63 @@ static void pxp_init_full(struct intel_pxp *pxp)
> destroy_vcs_context(pxp);
> }
>
> -void intel_pxp_init(struct intel_pxp *pxp)
> +static struct intel_gt *pxp_get_ctrl_gt(struct drm_i915_private *i915)
> {
> - struct intel_gt *gt = pxp_to_gt(pxp);
> + struct intel_gt *gt = NULL;
> + int i = 0;
No need to init.
>
> - /* we rely on the mei PXP module */
> - if (!IS_ENABLED(CONFIG_INTEL_MEI_PXP))
> - return;
> + for_each_gt(gt, i915, i) {
> + /* There can be only one GT with GSC-CS that supports PXP */
> + if (HAS_ENGINE(gt, GSC0))
> + return gt;
> + }
> +
> + /* Else we rely on the GT-0 with mei PXP module */
> + if (IS_ENABLED(CONFIG_INTEL_MEI_PXP) && !i915->media_gt)
> + return &i915->gt0;
> +
None of this makes sense unless CONFIG_DRM_I915_PXP, right?
> + return NULL;
> +}
> +
> +int intel_pxp_init(struct drm_i915_private *i915)
> +{
> + i915->pxp = kzalloc(sizeof(*i915->pxp), GFP_KERNEL);
> + if (!i915->pxp)
> + return -ENOMEM;
> +
> + i915->pxp->ctrl_gt = pxp_get_ctrl_gt(i915);
> + if (!i915->pxp->ctrl_gt) {
> + kfree(i915->pxp);
> + i915->pxp = NULL;
> + return -ENODEV;
> + }
If you store ctrl_gt in a local then you don't have to allocate until
you'll know you need it, however..
>
> /*
> * If HuC is loaded by GSC but PXP is disabled, we can skip the init of
> * the full PXP session/object management and just init the tee channel.
> */
> - if (HAS_PXP(gt->i915))
> - pxp_init_full(pxp);
> - else if (intel_huc_is_loaded_by_gsc(>->uc.huc) && intel_uc_uses_huc(>->uc))
> - intel_pxp_tee_component_init(pxp);
> + if (intel_pxp_is_supported(i915->pxp))
> + pxp_init_full(i915->pxp);
> + else if (intel_huc_is_loaded_by_gsc(&i915->pxp->ctrl_gt->uc.huc) &&
> + intel_uc_uses_huc(&i915->pxp->ctrl_gt->uc))
> + intel_pxp_tee_component_init(i915->pxp);
... intel_pxp_is_supported() returnsed false so what is the purpose of
the "else if" branch?
Which of the conditions in intel_pxp_is_supported can it fail on to get
here?
And purpose of exiting init with supported = no but i915->pxp set?
> +
> + return 0;
> }
>
> -void intel_pxp_fini(struct intel_pxp *pxp)
> +void intel_pxp_fini(struct drm_i915_private *i915)
> {
> - pxp->arb_is_valid = false;
> + if (!i915->pxp)
> + return;
>
> - intel_pxp_tee_component_fini(pxp);
> + i915->pxp->arb_is_valid = false;
>
> - destroy_vcs_context(pxp);
> + intel_pxp_tee_component_fini(i915->pxp);
> +
> + destroy_vcs_context(i915->pxp);
> +
> + kfree(i915->pxp);
> + i915->pxp = NULL;
> }
>
> void intel_pxp_mark_termination_in_progress(struct intel_pxp *pxp)
> @@ -173,7 +219,7 @@ void intel_pxp_mark_termination_in_progress(struct intel_pxp *pxp)
>
> static void pxp_queue_termination(struct intel_pxp *pxp)
> {
> - struct intel_gt *gt = pxp_to_gt(pxp);
> + struct intel_gt *gt = pxp->ctrl_gt;
>
> /*
> * We want to get the same effect as if we received a termination
> @@ -238,13 +284,13 @@ int intel_pxp_start(struct intel_pxp *pxp)
>
> void intel_pxp_init_hw(struct intel_pxp *pxp)
> {
> - kcr_pxp_enable(pxp_to_gt(pxp));
> + kcr_pxp_enable(pxp->ctrl_gt);
> intel_pxp_irq_enable(pxp);
> }
>
> void intel_pxp_fini_hw(struct intel_pxp *pxp)
> {
> - kcr_pxp_disable(pxp_to_gt(pxp));
> + kcr_pxp_disable(pxp->ctrl_gt);
>
> intel_pxp_irq_disable(pxp);
> }
> @@ -278,7 +324,7 @@ int intel_pxp_key_check(struct intel_pxp *pxp,
>
> void intel_pxp_invalidate(struct intel_pxp *pxp)
> {
> - struct drm_i915_private *i915 = pxp_to_gt(pxp)->i915;
> + struct drm_i915_private *i915 = pxp->ctrl_gt->i915;
> struct i915_gem_context *ctx, *cn;
>
> /* ban all contexts marked as protected */
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp.h b/drivers/gpu/drm/i915/pxp/intel_pxp.h
> index 2da309088c6d..04440fada711 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp.h
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp.h
> @@ -9,15 +9,16 @@
> #include <linux/errno.h>
> #include <linux/types.h>
>
> -struct intel_pxp;
> struct drm_i915_gem_object;
> +struct drm_i915_private;
> +struct intel_pxp;
>
> -struct intel_gt *pxp_to_gt(const struct intel_pxp *pxp);
> +bool intel_pxp_is_supported(const struct intel_pxp *pxp);
> bool intel_pxp_is_enabled(const struct intel_pxp *pxp);
> bool intel_pxp_is_active(const struct intel_pxp *pxp);
>
> -void intel_pxp_init(struct intel_pxp *pxp);
> -void intel_pxp_fini(struct intel_pxp *pxp);
> +int intel_pxp_init(struct drm_i915_private *i915);
> +void intel_pxp_fini(struct drm_i915_private *i915);
>
> void intel_pxp_init_hw(struct intel_pxp *pxp);
> void intel_pxp_fini_hw(struct intel_pxp *pxp);
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_cmd.c b/drivers/gpu/drm/i915/pxp/intel_pxp_cmd.c
> index f41e45763d0d..0eee51c4a772 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp_cmd.c
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_cmd.c
> @@ -3,9 +3,6 @@
> * Copyright(c) 2020, Intel Corporation. All rights reserved.
> */
>
> -#include "intel_pxp.h"
> -#include "intel_pxp_cmd.h"
> -#include "intel_pxp_session.h"
> #include "gt/intel_context.h"
> #include "gt/intel_engine_pm.h"
> #include "gt/intel_gpu_commands.h"
> @@ -13,6 +10,11 @@
>
> #include "i915_trace.h"
>
> +#include "intel_pxp.h"
> +#include "intel_pxp_cmd.h"
> +#include "intel_pxp_session.h"
> +#include "intel_pxp_types.h"
> +
> /* stall until prior PXP and MFX/HCP/HUC objects are cmopleted */
> #define MFX_WAIT_PXP (MFX_WAIT | \
> MFX_WAIT_DW0_PXP_SYNC_CONTROL_FLAG | \
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c b/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c
> index 4359e8be4101..8ae4a459236e 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c
> @@ -9,18 +9,20 @@
> #include <drm/drm_print.h>
>
> #include "gt/intel_gt_debugfs.h"
> +
> #include "i915_drv.h"
> +
> #include "intel_pxp.h"
> #include "intel_pxp_debugfs.h"
> #include "intel_pxp_irq.h"
> +#include "intel_pxp_types.h"
>
> static int pxp_info_show(struct seq_file *m, void *data)
> {
> struct intel_pxp *pxp = m->private;
> struct drm_printer p = drm_seq_file_printer(m);
> - bool enabled = intel_pxp_is_enabled(pxp);
>
> - if (!enabled) {
> + if (!intel_pxp_is_enabled(pxp)) {
Meh.
> drm_printf(&p, "pxp disabled\n");
> return 0;
> }
> @@ -30,7 +32,19 @@ static int pxp_info_show(struct seq_file *m, void *data)
>
> return 0;
> }
> -DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE(pxp_info);
> +
> +static int pxp_info_open(struct inode *inode, struct file *file)
> +{
> + return single_open(file, pxp_info_show, inode->i_private);
> +}
> +
> +static const struct file_operations pxp_info_fops = {
> + .owner = THIS_MODULE,
> + .open = pxp_info_open,
> + .read = seq_read,
> + .llseek = seq_lseek,
> + .release = single_release,
> +};
DEFINE_SHOW_ATTRIBUTE?
>
> static int pxp_terminate_get(void *data, u64 *val)
> {
> @@ -41,7 +55,7 @@ static int pxp_terminate_get(void *data, u64 *val)
> static int pxp_terminate_set(void *data, u64 val)
> {
> struct intel_pxp *pxp = data;
> - struct intel_gt *gt = pxp_to_gt(pxp);
> + struct intel_gt *gt = pxp->ctrl_gt;
>
> if (!intel_pxp_is_active(pxp))
> return -ENODEV;
> @@ -59,23 +73,26 @@ static int pxp_terminate_set(void *data, u64 val)
> }
>
> DEFINE_SIMPLE_ATTRIBUTE(pxp_terminate_fops, pxp_terminate_get, pxp_terminate_set, "%llx\n");
> -void intel_pxp_debugfs_register(struct intel_pxp *pxp, struct dentry *gt_root)
> +
> +void intel_pxp_debugfs_register(struct intel_pxp *pxp)
> {
> - static const struct intel_gt_debugfs_file files[] = {
> - { "info", &pxp_info_fops, NULL },
> - { "terminate_state", &pxp_terminate_fops, NULL },
> - };
> - struct dentry *root;
> + struct drm_minor *minor;
> + struct dentry *pxproot;
>
> - if (!gt_root)
> + if (!intel_pxp_is_supported(pxp))
> return;
>
> - if (!HAS_PXP((pxp_to_gt(pxp)->i915)))
> + minor = pxp->ctrl_gt->i915->drm.primary;
> + if (!minor->debugfs_root)
> return;
>
> - root = debugfs_create_dir("pxp", gt_root);
> - if (IS_ERR(root))
> + pxproot = debugfs_create_dir("pxp", minor->debugfs_root);
> + if (IS_ERR(pxproot))
> return;
>
> - intel_gt_debugfs_register_files(root, files, ARRAY_SIZE(files), pxp);
> + debugfs_create_file("info", 0444, pxproot,
> + pxp, &pxp_info_fops);
> +
> + debugfs_create_file("terminate_state", 0644, pxproot,
> + pxp, &pxp_terminate_fops);
> }
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.h b/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.h
> index 7e0c3d2f5d7e..299382b59e66 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.h
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.h
> @@ -10,10 +10,10 @@ struct intel_pxp;
> struct dentry;
>
> #ifdef CONFIG_DRM_I915_PXP
> -void intel_pxp_debugfs_register(struct intel_pxp *pxp, struct dentry *root);
> +void intel_pxp_debugfs_register(struct intel_pxp *pxp);
> #else
> static inline void
> -intel_pxp_debugfs_register(struct intel_pxp *pxp, struct dentry *root)
> +intel_pxp_debugfs_register(struct intel_pxp *pxp)
> {
> }
> #endif
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_huc.c b/drivers/gpu/drm/i915/pxp/intel_pxp_huc.c
> index 2e1165522950..bce20a86e05a 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp_huc.c
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_huc.c
> @@ -18,7 +18,7 @@
>
> int intel_pxp_huc_load_and_auth(struct intel_pxp *pxp)
> {
> - struct intel_gt *gt = pxp_to_gt(pxp);
> + struct intel_gt *gt = pxp->ctrl_gt;
> struct intel_huc *huc = >->uc.huc;
> struct pxp43_start_huc_auth_in huc_in = {0};
> struct pxp43_start_huc_auth_out huc_out = {0};
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_irq.c b/drivers/gpu/drm/i915/pxp/intel_pxp_irq.c
> index c28be430718a..da0ee619daec 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp_irq.c
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_irq.c
> @@ -3,14 +3,18 @@
> * Copyright(c) 2020 Intel Corporation.
> */
> #include <linux/workqueue.h>
> -#include "intel_pxp.h"
> -#include "intel_pxp_irq.h"
> -#include "intel_pxp_session.h"
> +
> #include "gt/intel_gt_irq.h"
> #include "gt/intel_gt_regs.h"
> #include "gt/intel_gt_types.h"
> +
> #include "i915_irq.h"
> #include "i915_reg.h"
> +
> +#include "intel_pxp.h"
> +#include "intel_pxp_irq.h"
> +#include "intel_pxp_session.h"
> +#include "intel_pxp_types.h"
> #include "intel_runtime_pm.h"
>
> /**
> @@ -20,7 +24,7 @@
> */
> void intel_pxp_irq_handler(struct intel_pxp *pxp, u16 iir)
> {
> - struct intel_gt *gt = pxp_to_gt(pxp);
> + struct intel_gt *gt = pxp->ctrl_gt;
>
> if (GEM_WARN_ON(!intel_pxp_is_enabled(pxp))) > return;
The early return is now less effective with spurious interrupts because
potentially NULL pxp has already been dereferenced to get the gt.
> @@ -62,7 +66,7 @@ static inline void pxp_irq_reset(struct intel_gt *gt)
>
> void intel_pxp_irq_enable(struct intel_pxp *pxp)
> {
> - struct intel_gt *gt = pxp_to_gt(pxp);
> + struct intel_gt *gt = pxp->ctrl_gt;
>
> spin_lock_irq(gt->irq_lock);
>
> @@ -77,7 +81,7 @@ void intel_pxp_irq_enable(struct intel_pxp *pxp)
>
> void intel_pxp_irq_disable(struct intel_pxp *pxp)
> {
> - struct intel_gt *gt = pxp_to_gt(pxp);
> + struct intel_gt *gt = pxp->ctrl_gt;
>
> /*
> * We always need to submit a global termination when we re-enable the
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_pm.c b/drivers/gpu/drm/i915/pxp/intel_pxp_pm.c
> index 6a7d4e2ee138..892d39cc61c1 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp_pm.c
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_pm.c
> @@ -3,11 +3,13 @@
> * Copyright(c) 2020 Intel Corporation.
> */
>
> +#include "i915_drv.h"
> +
> #include "intel_pxp.h"
> #include "intel_pxp_irq.h"
> #include "intel_pxp_pm.h"
> #include "intel_pxp_session.h"
> -#include "i915_drv.h"
> +#include "intel_pxp_types.h"
>
> void intel_pxp_suspend_prepare(struct intel_pxp *pxp)
> {
> @@ -26,7 +28,7 @@ void intel_pxp_suspend(struct intel_pxp *pxp)
> if (!intel_pxp_is_enabled(pxp))
> return;
>
> - with_intel_runtime_pm(&pxp_to_gt(pxp)->i915->runtime_pm, wakeref) {
> + with_intel_runtime_pm(&pxp->ctrl_gt->i915->runtime_pm, wakeref) {
> intel_pxp_fini_hw(pxp);
> pxp->hw_state_invalidated = false;
> }
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_session.c b/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
> index 85572360c71a..ae413580b81a 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
> @@ -20,7 +20,7 @@
>
> static bool intel_pxp_session_is_in_play(struct intel_pxp *pxp, u32 id)
> {
> - struct intel_uncore *uncore = pxp_to_gt(pxp)->uncore;
> + struct intel_uncore *uncore = pxp->ctrl_gt->uncore;
> intel_wakeref_t wakeref;
> u32 sip = 0;
>
> @@ -33,7 +33,7 @@ static bool intel_pxp_session_is_in_play(struct intel_pxp *pxp, u32 id)
>
> static int pxp_wait_for_session_state(struct intel_pxp *pxp, u32 id, bool in_play)
> {
> - struct intel_uncore *uncore = pxp_to_gt(pxp)->uncore;
> + struct intel_uncore *uncore = pxp->ctrl_gt->uncore;
> intel_wakeref_t wakeref;
> u32 mask = BIT(id);
> int ret;
> @@ -56,7 +56,7 @@ static int pxp_wait_for_session_state(struct intel_pxp *pxp, u32 id, bool in_pla
>
> static int pxp_create_arb_session(struct intel_pxp *pxp)
> {
> - struct intel_gt *gt = pxp_to_gt(pxp);
> + struct intel_gt *gt = pxp->ctrl_gt;
> int ret;
>
> pxp->arb_is_valid = false;
> @@ -90,7 +90,7 @@ static int pxp_create_arb_session(struct intel_pxp *pxp)
> static int pxp_terminate_arb_session_and_global(struct intel_pxp *pxp)
> {
> int ret;
> - struct intel_gt *gt = pxp_to_gt(pxp);
> + struct intel_gt *gt = pxp->ctrl_gt;
>
> /* must mark termination in progress calling this function */
> GEM_WARN_ON(pxp->arb_is_valid);
> @@ -141,7 +141,7 @@ static void pxp_terminate_complete(struct intel_pxp *pxp)
> static void pxp_session_work(struct work_struct *work)
> {
> struct intel_pxp *pxp = container_of(work, typeof(*pxp), session_work);
> - struct intel_gt *gt = pxp_to_gt(pxp);
> + struct intel_gt *gt = pxp->ctrl_gt;
> intel_wakeref_t wakeref;
> u32 events = 0;
>
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c b/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
> index b0c9170b1395..d50354bfb993 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_tee.c
> @@ -11,25 +11,20 @@
> #include "gem/i915_gem_lmem.h"
>
> #include "i915_drv.h"
> +
> #include "intel_pxp.h"
> -#include "intel_pxp_session.h"
> -#include "intel_pxp_tee.h"
> #include "intel_pxp_cmd_interface_42.h"
> #include "intel_pxp_huc.h"
> -
> -static inline struct intel_pxp *i915_dev_to_pxp(struct device *i915_kdev)
> -{
> - struct drm_i915_private *i915 = kdev_to_i915(i915_kdev);
> -
> - return &to_gt(i915)->pxp;
> -}
> +#include "intel_pxp_session.h"
> +#include "intel_pxp_tee.h"
> +#include "intel_pxp_types.h"
>
> static int intel_pxp_tee_io_message(struct intel_pxp *pxp,
> void *msg_in, u32 msg_in_size,
> void *msg_out, u32 msg_out_max_size,
> u32 *msg_out_rcv_size)
> {
> - struct drm_i915_private *i915 = pxp_to_gt(pxp)->i915;
> + struct drm_i915_private *i915 = pxp->ctrl_gt->i915;
> struct i915_pxp_component *pxp_component = pxp->pxp_component;
> int ret = 0;
>
> @@ -79,7 +74,7 @@ int intel_pxp_tee_stream_message(struct intel_pxp *pxp,
> {
> /* TODO: for bigger objects we need to use a sg of 4k pages */
> const size_t max_msg_size = PAGE_SIZE;
> - struct drm_i915_private *i915 = pxp_to_gt(pxp)->i915;
> + struct drm_i915_private *i915 = pxp->ctrl_gt->i915;
> struct i915_pxp_component *pxp_component = pxp->pxp_component;
> unsigned int offset = 0;
> struct scatterlist *sg;
> @@ -127,8 +122,8 @@ static int i915_pxp_tee_component_bind(struct device *i915_kdev,
> struct device *tee_kdev, void *data)
> {
> struct drm_i915_private *i915 = kdev_to_i915(i915_kdev);
> - struct intel_pxp *pxp = i915_dev_to_pxp(i915_kdev);
> - struct intel_uc *uc = &pxp_to_gt(pxp)->uc;
> + struct intel_pxp *pxp = i915->pxp;
> + struct intel_uc *uc = &pxp->ctrl_gt->uc;
> intel_wakeref_t wakeref;
> int ret = 0;
>
> @@ -164,7 +159,7 @@ static void i915_pxp_tee_component_unbind(struct device *i915_kdev,
> struct device *tee_kdev, void *data)
> {
> struct drm_i915_private *i915 = kdev_to_i915(i915_kdev);
> - struct intel_pxp *pxp = i915_dev_to_pxp(i915_kdev);
> + struct intel_pxp *pxp = i915->pxp;
> intel_wakeref_t wakeref;
>
> if (intel_pxp_is_enabled(pxp))
> @@ -183,7 +178,7 @@ static const struct component_ops i915_pxp_tee_component_ops = {
>
> static int alloc_streaming_command(struct intel_pxp *pxp)
> {
> - struct drm_i915_private *i915 = pxp_to_gt(pxp)->i915;
> + struct drm_i915_private *i915 = pxp->ctrl_gt->i915;
> struct drm_i915_gem_object *obj = NULL;
> void *cmd;
> int err;
> @@ -244,7 +239,7 @@ static void free_streaming_command(struct intel_pxp *pxp)
> int intel_pxp_tee_component_init(struct intel_pxp *pxp)
> {
> int ret;
> - struct intel_gt *gt = pxp_to_gt(pxp);
> + struct intel_gt *gt = pxp->ctrl_gt;
> struct drm_i915_private *i915 = gt->i915;
>
> mutex_init(&pxp->tee_mutex);
> @@ -271,7 +266,7 @@ int intel_pxp_tee_component_init(struct intel_pxp *pxp)
>
> void intel_pxp_tee_component_fini(struct intel_pxp *pxp)
> {
> - struct drm_i915_private *i915 = pxp_to_gt(pxp)->i915;
> + struct drm_i915_private *i915 = pxp->ctrl_gt->i915;
>
> if (!pxp->pxp_component_added)
> return;
> @@ -285,7 +280,7 @@ void intel_pxp_tee_component_fini(struct intel_pxp *pxp)
> int intel_pxp_tee_cmd_create_arb_session(struct intel_pxp *pxp,
> int arb_session_id)
> {
> - struct drm_i915_private *i915 = pxp_to_gt(pxp)->i915;
> + struct drm_i915_private *i915 = pxp->ctrl_gt->i915;
> struct pxp42_create_arb_in msg_in = {0};
> struct pxp42_create_arb_out msg_out = {0};
> int ret;
> diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_types.h b/drivers/gpu/drm/i915/pxp/intel_pxp_types.h
> index f74b1e11a505..7dc5f08d1583 100644
> --- a/drivers/gpu/drm/i915/pxp/intel_pxp_types.h
> +++ b/drivers/gpu/drm/i915/pxp/intel_pxp_types.h
> @@ -12,12 +12,20 @@
> #include <linux/workqueue.h>
>
> struct intel_context;
> +struct intel_gt;
> struct i915_pxp_component;
> +struct drm_i915_private;
>
> /**
> * struct intel_pxp - pxp state
> */
> struct intel_pxp {
> + /**
> + * @ctrl_gt: poiner to the tile that owns the controls for PXP subsystem assets that
> + * the VDBOX, the KCR engine (and GSC CS depending on the platform)
> + */
> + struct intel_gt *ctrl_gt;
> +
> /**
> * @pxp_component: i915_pxp_component struct of the bound mei_pxp
> * module. Only set and cleared inside component bind/unbind functions,
>
> base-commit: 886c7f9510ce20f099d27d9e7d9de32402c9e5e6
I haven't read it all in detail but just a gut feel init flow is not
easy enough to understand, feels like it should be streamlined and
simplified to become as self-documenting as possible. Plus some minor
details.
Regards,
Tvrtko
More information about the Intel-gfx
mailing list