308 lines
9.0 KiB
C
308 lines
9.0 KiB
C
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/*
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* Copyright © 2016 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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*/
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#ifndef __I915_GEM_CONTEXT_H__
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#define __I915_GEM_CONTEXT_H__
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#include <linux/bitops.h>
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#include <linux/list.h>
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#include <linux/radix-tree.h>
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struct pid;
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struct drm_device;
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struct drm_file;
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struct drm_i915_private;
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struct drm_i915_file_private;
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struct i915_hw_ppgtt;
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struct i915_vma;
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struct intel_ring;
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#define DEFAULT_CONTEXT_HANDLE 0
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/**
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* struct i915_gem_context - client state
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*
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* The struct i915_gem_context represents the combined view of the driver and
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* logical hardware state for a particular client.
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*/
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struct i915_gem_context {
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/** i915: i915 device backpointer */
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struct drm_i915_private *i915;
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/** file_priv: owning file descriptor */
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struct drm_i915_file_private *file_priv;
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/**
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* @ppgtt: unique address space (GTT)
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*
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* In full-ppgtt mode, each context has its own address space ensuring
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* complete seperation of one client from all others.
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*
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* In other modes, this is a NULL pointer with the expectation that
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* the caller uses the shared global GTT.
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*/
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struct i915_hw_ppgtt *ppgtt;
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/**
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* @pid: process id of creator
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*
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* Note that who created the context may not be the principle user,
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* as the context may be shared across a local socket. However,
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* that should only affect the default context, all contexts created
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* explicitly by the client are expected to be isolated.
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*/
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struct pid *pid;
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/**
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* @name: arbitrary name
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*
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* A name is constructed for the context from the creator's process
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* name, pid and user handle in order to uniquely identify the
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* context in messages.
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*/
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const char *name;
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/** link: place with &drm_i915_private.context_list */
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struct list_head link;
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struct llist_node free_link;
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/**
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* @ref: reference count
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*
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* A reference to a context is held by both the client who created it
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* and on each request submitted to the hardware using the request
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* (to ensure the hardware has access to the state until it has
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* finished all pending writes). See i915_gem_context_get() and
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* i915_gem_context_put() for access.
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*/
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struct kref ref;
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/**
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* @rcu: rcu_head for deferred freeing.
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*/
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struct rcu_head rcu;
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/**
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* @flags: small set of booleans
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*/
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unsigned long flags;
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#define CONTEXT_NO_ZEROMAP BIT(0)
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#define CONTEXT_NO_ERROR_CAPTURE 1
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#define CONTEXT_CLOSED 2
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#define CONTEXT_BANNABLE 3
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#define CONTEXT_BANNED 4
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#define CONTEXT_FORCE_SINGLE_SUBMISSION 5
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/**
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* @hw_id: - unique identifier for the context
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*
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* The hardware needs to uniquely identify the context for a few
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* functions like fault reporting, PASID, scheduling. The
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* &drm_i915_private.context_hw_ida is used to assign a unqiue
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* id for the lifetime of the context.
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*/
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unsigned int hw_id;
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/**
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* @user_handle: userspace identifier
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*
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* A unique per-file identifier is generated from
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* &drm_i915_file_private.contexts.
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*/
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u32 user_handle;
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/**
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* @priority: execution and service priority
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*
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* All clients are equal, but some are more equal than others!
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*
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* Requests from a context with a greater (more positive) value of
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* @priority will be executed before those with a lower @priority
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* value, forming a simple QoS.
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*
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* The &drm_i915_private.kernel_context is assigned the lowest priority.
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*/
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int priority;
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/** ggtt_offset_bias: placement restriction for context objects */
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u32 ggtt_offset_bias;
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/** engine: per-engine logical HW state */
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struct intel_context {
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struct i915_vma *state;
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struct intel_ring *ring;
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u32 *lrc_reg_state;
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u64 lrc_desc;
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int pin_count;
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bool initialised;
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} engine[I915_NUM_ENGINES];
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/** ring_size: size for allocating the per-engine ring buffer */
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u32 ring_size;
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/** desc_template: invariant fields for the HW context descriptor */
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u32 desc_template;
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/** guilty_count: How many times this context has caused a GPU hang. */
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atomic_t guilty_count;
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/**
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* @active_count: How many times this context was active during a GPU
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* hang, but did not cause it.
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*/
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atomic_t active_count;
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#define CONTEXT_SCORE_GUILTY 10
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#define CONTEXT_SCORE_BAN_THRESHOLD 40
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/** ban_score: Accumulated score of all hangs caused by this context. */
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atomic_t ban_score;
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/** remap_slice: Bitmask of cache lines that need remapping */
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u8 remap_slice;
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/** handles_vma: rbtree to look up our context specific obj/vma for
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* the user handle. (user handles are per fd, but the binding is
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* per vm, which may be one per context or shared with the global GTT)
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*/
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struct radix_tree_root handles_vma;
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/** handles_list: reverse list of all the rbtree entries in use for
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* this context, which allows us to free all the allocations on
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* context close.
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*/
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struct list_head handles_list;
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};
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static inline bool i915_gem_context_is_closed(const struct i915_gem_context *ctx)
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{
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return test_bit(CONTEXT_CLOSED, &ctx->flags);
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}
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static inline void i915_gem_context_set_closed(struct i915_gem_context *ctx)
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{
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GEM_BUG_ON(i915_gem_context_is_closed(ctx));
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__set_bit(CONTEXT_CLOSED, &ctx->flags);
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}
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static inline bool i915_gem_context_no_error_capture(const struct i915_gem_context *ctx)
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{
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return test_bit(CONTEXT_NO_ERROR_CAPTURE, &ctx->flags);
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}
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static inline void i915_gem_context_set_no_error_capture(struct i915_gem_context *ctx)
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{
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__set_bit(CONTEXT_NO_ERROR_CAPTURE, &ctx->flags);
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}
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static inline void i915_gem_context_clear_no_error_capture(struct i915_gem_context *ctx)
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{
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__clear_bit(CONTEXT_NO_ERROR_CAPTURE, &ctx->flags);
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}
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static inline bool i915_gem_context_is_bannable(const struct i915_gem_context *ctx)
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{
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return test_bit(CONTEXT_BANNABLE, &ctx->flags);
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}
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static inline void i915_gem_context_set_bannable(struct i915_gem_context *ctx)
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{
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__set_bit(CONTEXT_BANNABLE, &ctx->flags);
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}
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static inline void i915_gem_context_clear_bannable(struct i915_gem_context *ctx)
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{
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__clear_bit(CONTEXT_BANNABLE, &ctx->flags);
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}
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static inline bool i915_gem_context_is_banned(const struct i915_gem_context *ctx)
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{
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return test_bit(CONTEXT_BANNED, &ctx->flags);
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}
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static inline void i915_gem_context_set_banned(struct i915_gem_context *ctx)
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{
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__set_bit(CONTEXT_BANNED, &ctx->flags);
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}
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static inline bool i915_gem_context_force_single_submission(const struct i915_gem_context *ctx)
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{
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return test_bit(CONTEXT_FORCE_SINGLE_SUBMISSION, &ctx->flags);
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}
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static inline void i915_gem_context_set_force_single_submission(struct i915_gem_context *ctx)
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{
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__set_bit(CONTEXT_FORCE_SINGLE_SUBMISSION, &ctx->flags);
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}
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static inline bool i915_gem_context_is_default(const struct i915_gem_context *c)
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{
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return c->user_handle == DEFAULT_CONTEXT_HANDLE;
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}
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static inline bool i915_gem_context_is_kernel(struct i915_gem_context *ctx)
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{
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return !ctx->file_priv;
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}
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/* i915_gem_context.c */
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int __must_check i915_gem_contexts_init(struct drm_i915_private *dev_priv);
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void i915_gem_contexts_lost(struct drm_i915_private *dev_priv);
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void i915_gem_contexts_fini(struct drm_i915_private *dev_priv);
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int i915_gem_context_open(struct drm_i915_private *i915,
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struct drm_file *file);
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void i915_gem_context_close(struct drm_file *file);
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int i915_switch_context(struct drm_i915_gem_request *req);
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int i915_gem_switch_to_kernel_context(struct drm_i915_private *dev_priv);
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void i915_gem_context_release(struct kref *ctx_ref);
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struct i915_gem_context *
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i915_gem_context_create_gvt(struct drm_device *dev);
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int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file);
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int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file);
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int i915_gem_context_getparam_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv);
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int i915_gem_context_setparam_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv);
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int i915_gem_context_reset_stats_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file);
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static inline struct i915_gem_context *
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i915_gem_context_get(struct i915_gem_context *ctx)
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{
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kref_get(&ctx->ref);
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return ctx;
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}
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static inline void i915_gem_context_put(struct i915_gem_context *ctx)
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{
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kref_put(&ctx->ref, i915_gem_context_release);
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}
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#endif /* !__I915_GEM_CONTEXT_H__ */
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