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276418c013
Currently, each process holding an open TegraDRM channel reserves for itself one of the limited number of hardware memory contexts. Attempting to allocate a channel when all contexts are in use results in failure. While we cannot have more contexts than the hardware supports in active use, idle channels don't necessarily need to have a backing memory context. As such, in this patch, we add another layer to allow hardware memory contexts to be "stolen away" by channels that are in active use, from idle processes. The way this is implemented, is by keeping track of memory mappings on each abstracted memory context. If we need to steal that memory context's backing hardware context, we unmap everything from it and give it away. When that abstracted memory context is needed again (re-activated), we attempt to allocate or steal another hardware context and re-map the previously unmapped buffers. Unfortunately, this means additional overhead and unpredictability at submit time. Submit can fail if we cannot re-allocate a backing memory context. Future work includes a provision for un-stealable backing hardware memory contexts for processes requiring more determinism, as well as optimization and cosmetic improvements. Bug 4403250 Bug 4399310 Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com> Change-Id: I3d13e3476f1bff3c4757152254496cddaaafd76a Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3058905 Reviewed-by: Santosh BS <santoshb@nvidia.com> GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3227749 GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com> Tested-by: Dane Liu <danel@nvidia.com> Reviewed-by: Bibek Basu <bbasu@nvidia.com>
233 lines
6.8 KiB
C
233 lines
6.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2012 Avionic Design GmbH
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* Copyright (C) 2012-2013 NVIDIA CORPORATION. All rights reserved.
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*/
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#ifndef HOST1X_DRM_H
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#define HOST1X_DRM_H 1
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#include <linux/host1x-next.h>
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#include <linux/iova.h>
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#include <linux/gpio/consumer.h>
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#include <drm/drm_atomic.h>
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#include <drm/drm_bridge.h>
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#include <drm/drm_edid.h>
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#include <drm/drm_encoder.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_fixed.h>
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#include <drm/drm_probe_helper.h>
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#include <uapi/drm/tegra_drm_next.h>
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#include "gem.h"
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#include "hub.h"
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#include <trace/events/trace.h>
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/* XXX move to include/uapi/drm/drm_fourcc.h? */
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#define DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT BIT_ULL(22)
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struct reset_control;
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#ifdef CONFIG_DRM_FBDEV_EMULATION
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struct tegra_fbdev {
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struct drm_fb_helper base;
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struct drm_framebuffer *fb;
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};
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#endif
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struct tegra_drm {
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struct drm_device *drm;
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struct iommu_domain *domain;
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bool use_explicit_iommu;
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struct mutex mm_lock;
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struct drm_mm mm;
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struct {
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struct iova_domain domain;
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unsigned long shift;
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unsigned long limit;
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} carveout;
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struct mutex clients_lock;
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struct list_head clients;
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#ifdef CONFIG_DRM_FBDEV_EMULATION
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struct tegra_fbdev *fbdev;
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#endif
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unsigned int hmask, vmask;
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unsigned int pitch_align;
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unsigned int num_crtcs;
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struct tegra_display_hub *hub;
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};
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static inline struct host1x *tegra_drm_to_host1x(struct tegra_drm *tegra)
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{
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return dev_get_drvdata(tegra->drm->dev->parent);
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}
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struct tegra_drm_client;
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struct tegra_drm_context {
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struct tegra_drm_client *client;
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struct host1x_channel *channel;
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/* Only used by legacy UAPI. */
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unsigned int id;
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/* Only used by new UAPI. */
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struct xarray mappings;
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struct host1x_memory_context *memory_context;
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};
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struct tegra_drm_client_ops {
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int (*open_channel)(struct tegra_drm_client *client,
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struct tegra_drm_context *context);
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void (*close_channel)(struct tegra_drm_context *context);
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int (*is_addr_reg)(struct device *dev, u32 class, u32 offset);
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int (*is_valid_class)(u32 class);
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int (*submit)(struct tegra_drm_context *context,
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struct drm_tegra_submit *args, struct drm_device *drm,
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struct drm_file *file);
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int (*get_streamid_offset)(struct tegra_drm_client *client, u32 *offset);
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int (*can_use_memory_ctx)(struct tegra_drm_client *client, bool *supported);
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int (*has_job_timestamping)(struct tegra_drm_client *client, bool *supported);
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};
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int tegra_drm_submit(struct tegra_drm_context *context,
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struct drm_tegra_submit *args, struct drm_device *drm,
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struct drm_file *file);
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static inline int
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tegra_drm_get_streamid_offset_thi(struct tegra_drm_client *client, u32 *offset)
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{
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*offset = 0x30;
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return 0;
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}
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struct tegra_drm_client {
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struct host1x_client base;
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struct list_head list;
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struct tegra_drm *drm;
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struct host1x_channel *shared_channel;
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/* Set by driver */
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unsigned int version;
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const struct tegra_drm_client_ops *ops;
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};
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static inline struct tegra_drm_client *
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host1x_to_drm_client(struct host1x_client *client)
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{
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return container_of(client, struct tegra_drm_client, base);
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}
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static inline struct device *
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tegra_drm_context_get_memory_device(struct tegra_drm_context *context)
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{
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if (context->memory_context)
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return context->memory_context->context_dev;
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else
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return context->client->base.dev;
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}
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int tegra_drm_register_client(struct tegra_drm *tegra,
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struct tegra_drm_client *client);
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int tegra_drm_unregister_client(struct tegra_drm *tegra,
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struct tegra_drm_client *client);
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int host1x_client_iommu_attach(struct host1x_client *client);
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void host1x_client_iommu_detach(struct host1x_client *client);
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int tegra_drm_init(struct tegra_drm *tegra, struct drm_device *drm);
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int tegra_drm_exit(struct tegra_drm *tegra);
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void *tegra_drm_alloc(struct tegra_drm *tegra, size_t size, dma_addr_t *iova);
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void tegra_drm_free(struct tegra_drm *tegra, size_t size, void *virt,
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dma_addr_t iova);
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struct cec_notifier;
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struct tegra_output {
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struct device_node *of_node;
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struct device *dev;
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struct drm_bridge *bridge;
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struct drm_panel *panel;
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struct i2c_adapter *ddc;
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const struct edid *edid;
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struct cec_notifier *cec;
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unsigned int hpd_irq;
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struct gpio_desc *hpd_gpio;
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struct drm_encoder encoder;
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struct drm_connector connector;
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};
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static inline struct tegra_output *encoder_to_output(struct drm_encoder *e)
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{
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return container_of(e, struct tegra_output, encoder);
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}
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static inline struct tegra_output *connector_to_output(struct drm_connector *c)
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{
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return container_of(c, struct tegra_output, connector);
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}
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/* from output.c */
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int tegra_output_probe(struct tegra_output *output);
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void tegra_output_remove(struct tegra_output *output);
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int tegra_output_init(struct drm_device *drm, struct tegra_output *output);
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void tegra_output_exit(struct tegra_output *output);
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void tegra_output_find_possible_crtcs(struct tegra_output *output,
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struct drm_device *drm);
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int tegra_output_suspend(struct tegra_output *output);
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int tegra_output_resume(struct tegra_output *output);
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int tegra_output_connector_get_modes(struct drm_connector *connector);
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enum drm_connector_status
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tegra_output_connector_detect(struct drm_connector *connector, bool force);
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void tegra_output_connector_destroy(struct drm_connector *connector);
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/* from dpaux.c */
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struct drm_dp_aux *drm_dp_aux_find_by_of_node(struct device_node *np);
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enum drm_connector_status drm_dp_aux_detect(struct drm_dp_aux *aux);
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int drm_dp_aux_attach(struct drm_dp_aux *aux, struct tegra_output *output);
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int drm_dp_aux_detach(struct drm_dp_aux *aux);
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int drm_dp_aux_enable(struct drm_dp_aux *aux);
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int drm_dp_aux_disable(struct drm_dp_aux *aux);
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/* from fb.c */
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struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer,
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unsigned int index);
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bool tegra_fb_is_bottom_up(struct drm_framebuffer *framebuffer);
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int tegra_fb_get_tiling(struct drm_framebuffer *framebuffer,
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struct tegra_bo_tiling *tiling);
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struct drm_framebuffer *tegra_fb_create(struct drm_device *drm,
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struct drm_file *file,
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const struct drm_mode_fb_cmd2 *cmd);
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int tegra_drm_fb_prepare(struct drm_device *drm);
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void tegra_drm_fb_free(struct drm_device *drm);
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int tegra_drm_fb_init(struct drm_device *drm);
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void tegra_drm_fb_exit(struct drm_device *drm);
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extern struct platform_driver tegra_display_hub_driver;
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extern struct platform_driver tegra_dc_driver;
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extern struct platform_driver tegra_hdmi_driver;
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extern struct platform_driver tegra_dsi_driver;
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extern struct platform_driver tegra_dpaux_driver;
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extern struct platform_driver tegra_sor_driver;
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extern struct platform_driver tegra_gr2d_driver;
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extern struct platform_driver tegra_gr3d_driver;
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extern struct platform_driver tegra_vic_driver;
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extern struct platform_driver tegra_nvdec_driver;
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extern struct platform_driver tegra_nvenc_driver;
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extern struct platform_driver tegra_nvjpg_driver;
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extern struct platform_driver tegra_ofa_driver;
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extern struct platform_driver tegra_virt_engine_driver;
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#endif /* HOST1X_DRM_H */
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