// SPDX-License-Identifier: GPL-2.0 OR MIT /************************************************************************** * * Copyright (c) 2024 Broadcom. All Rights Reserved. The term * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. * * 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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. * **************************************************************************/ #include "vmwgfx_vkms.h" #include "vmwgfx_bo.h" #include "vmwgfx_drv.h" #include "vmwgfx_kms.h" #include "vmw_surface_cache.h" #include <drm/drm_crtc.h> #include <drm/drm_debugfs_crc.h> #include <drm/drm_print.h> #include <drm/drm_vblank.h> #include <linux/crc32.h> #include <linux/delay.h> #define GUESTINFO_VBLANK … static int vmw_surface_sync(struct vmw_private *vmw, struct vmw_surface *surf) { … } static void compute_crc(struct drm_crtc *crtc, struct vmw_surface *surf, u32 *crc) { … } static void crc_generate_worker(struct work_struct *work) { … } static enum hrtimer_restart vmw_vkms_vblank_simulate(struct hrtimer *timer) { … } void vmw_vkms_init(struct vmw_private *vmw) { … } void vmw_vkms_cleanup(struct vmw_private *vmw) { … } bool vmw_vkms_get_vblank_timestamp(struct drm_crtc *crtc, int *max_error, ktime_t *vblank_time, bool in_vblank_irq) { … } int vmw_vkms_enable_vblank(struct drm_crtc *crtc) { … } void vmw_vkms_disable_vblank(struct drm_crtc *crtc) { … } enum vmw_vkms_lock_state { … }; void vmw_vkms_crtc_init(struct drm_crtc *crtc) { … } void vmw_vkms_crtc_cleanup(struct drm_crtc *crtc) { … } void vmw_vkms_crtc_atomic_begin(struct drm_crtc *crtc, struct drm_atomic_state *state) { … } void vmw_vkms_crtc_atomic_flush(struct drm_crtc *crtc, struct drm_atomic_state *state) { … } void vmw_vkms_crtc_atomic_enable(struct drm_crtc *crtc, struct drm_atomic_state *state) { … } void vmw_vkms_crtc_atomic_disable(struct drm_crtc *crtc, struct drm_atomic_state *state) { … } static bool is_crc_supported(struct drm_crtc *crtc) { … } static const char * const pipe_crc_sources[] = …; static int crc_parse_source(const char *src_name, bool *enabled) { … } const char *const * vmw_vkms_get_crc_sources(struct drm_crtc *crtc, size_t *count) { … } int vmw_vkms_verify_crc_source(struct drm_crtc *crtc, const char *src_name, size_t *values_cnt) { … } int vmw_vkms_set_crc_source(struct drm_crtc *crtc, const char *src_name) { … } void vmw_vkms_set_crc_surface(struct drm_crtc *crtc, struct vmw_surface *surf) { … } /** * vmw_vkms_lock_max_wait_ns - Return the max wait for the vkms lock * @du: The vmw_display_unit from which to grab the vblank timings * * Returns the maximum wait time used to acquire the vkms lock. By * default uses a time of a single frame and in case where vblank * was not initialized for the display unit 1/60th of a second. */ static inline u64 vmw_vkms_lock_max_wait_ns(struct vmw_display_unit *du) { … } /** * vmw_vkms_modeset_lock - Protects access to crtc during modeset * @crtc: The crtc to lock for vkms * * This function prevents the VKMS timers/callbacks from being called * while a modeset operation is in process. We don't want the callbacks * e.g. the vblank simulator to be trying to access incomplete state * so we need to make sure they execute only when the modeset has * finished. * * Normally this would have been done with a spinlock but locking the * entire atomic modeset with vmwgfx is impossible because kms prepare * executes non-atomic ops (e.g. vmw_validation_prepare holds a mutex to * guard various bits of state). Which means that we need to synchronize * atomic context (the vblank handler) with the non-atomic entirity * of kms - so use an atomic_t to track which part of vkms has access * to the basic vkms state. */ void vmw_vkms_modeset_lock(struct drm_crtc *crtc) { … } /** * vmw_vkms_modeset_lock_relaxed - Protects access to crtc during modeset * @crtc: The crtc to lock for vkms * * Much like vmw_vkms_modeset_lock except that when the crtc is currently * in a modeset it will return immediately. * * Returns true if actually locked vkms to modeset or false otherwise. */ bool vmw_vkms_modeset_lock_relaxed(struct drm_crtc *crtc) { … } /** * vmw_vkms_vblank_trylock - Protects access to crtc during vblank * @crtc: The crtc to lock for vkms * * Tries to lock vkms for vblank, returns immediately. * * Returns true if locked vkms to vblank or false otherwise. */ bool vmw_vkms_vblank_trylock(struct drm_crtc *crtc) { … } void vmw_vkms_unlock(struct drm_crtc *crtc) { … }
Codebase Browser
linux