diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_context_types.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_context_types.h | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_context_types.h b/drivers/gpu/drm/i915/i915_gem_context_types.h new file mode 100644 index 000000000000..e2ec58b10fb2 --- /dev/null +++ b/drivers/gpu/drm/i915/i915_gem_context_types.h @@ -0,0 +1,175 @@ +/* + * SPDX-License-Identifier: MIT + * + * Copyright © 2019 Intel Corporation + */ + +#ifndef __I915_GEM_CONTEXT_TYPES_H__ +#define __I915_GEM_CONTEXT_TYPES_H__ + +#include <linux/atomic.h> +#include <linux/list.h> +#include <linux/llist.h> +#include <linux/kref.h> +#include <linux/mutex.h> +#include <linux/radix-tree.h> +#include <linux/rbtree.h> +#include <linux/rcupdate.h> +#include <linux/types.h> + +#include "i915_scheduler.h" +#include "intel_context_types.h" + +struct pid; + +struct drm_i915_private; +struct drm_i915_file_private; +struct i915_hw_ppgtt; +struct i915_timeline; +struct intel_ring; + +/** + * struct i915_gem_context - client state + * + * The struct i915_gem_context represents the combined view of the driver and + * logical hardware state for a particular client. + */ +struct i915_gem_context { + /** i915: i915 device backpointer */ + struct drm_i915_private *i915; + + /** file_priv: owning file descriptor */ + struct drm_i915_file_private *file_priv; + + struct i915_timeline *timeline; + + /** + * @ppgtt: unique address space (GTT) + * + * In full-ppgtt mode, each context has its own address space ensuring + * complete seperation of one client from all others. + * + * In other modes, this is a NULL pointer with the expectation that + * the caller uses the shared global GTT. + */ + struct i915_hw_ppgtt *ppgtt; + + /** + * @pid: process id of creator + * + * Note that who created the context may not be the principle user, + * as the context may be shared across a local socket. However, + * that should only affect the default context, all contexts created + * explicitly by the client are expected to be isolated. + */ + struct pid *pid; + + /** + * @name: arbitrary name + * + * A name is constructed for the context from the creator's process + * name, pid and user handle in order to uniquely identify the + * context in messages. + */ + const char *name; + + /** link: place with &drm_i915_private.context_list */ + struct list_head link; + struct llist_node free_link; + + /** + * @ref: reference count + * + * A reference to a context is held by both the client who created it + * and on each request submitted to the hardware using the request + * (to ensure the hardware has access to the state until it has + * finished all pending writes). See i915_gem_context_get() and + * i915_gem_context_put() for access. + */ + struct kref ref; + + /** + * @rcu: rcu_head for deferred freeing. + */ + struct rcu_head rcu; + + /** + * @user_flags: small set of booleans controlled by the user + */ + unsigned long user_flags; +#define UCONTEXT_NO_ZEROMAP 0 +#define UCONTEXT_NO_ERROR_CAPTURE 1 +#define UCONTEXT_BANNABLE 2 +#define UCONTEXT_RECOVERABLE 3 + + /** + * @flags: small set of booleans + */ + unsigned long flags; +#define CONTEXT_BANNED 0 +#define CONTEXT_CLOSED 1 +#define CONTEXT_FORCE_SINGLE_SUBMISSION 2 + + /** + * @hw_id: - unique identifier for the context + * + * The hardware needs to uniquely identify the context for a few + * functions like fault reporting, PASID, scheduling. The + * &drm_i915_private.context_hw_ida is used to assign a unqiue + * id for the lifetime of the context. + * + * @hw_id_pin_count: - number of times this context had been pinned + * for use (should be, at most, once per engine). + * + * @hw_id_link: - all contexts with an assigned id are tracked + * for possible repossession. + */ + unsigned int hw_id; + atomic_t hw_id_pin_count; + struct list_head hw_id_link; + + struct list_head active_engines; + struct mutex mutex; + + struct i915_sched_attr sched; + + /** hw_contexts: per-engine logical HW state */ + struct rb_root hw_contexts; + spinlock_t hw_contexts_lock; + + /** ring_size: size for allocating the per-engine ring buffer */ + u32 ring_size; + /** desc_template: invariant fields for the HW context descriptor */ + u32 desc_template; + + /** guilty_count: How many times this context has caused a GPU hang. */ + atomic_t guilty_count; + /** + * @active_count: How many times this context was active during a GPU + * hang, but did not cause it. + */ + atomic_t active_count; + + /** + * @hang_timestamp: The last time(s) this context caused a GPU hang + */ + unsigned long hang_timestamp[2]; +#define CONTEXT_FAST_HANG_JIFFIES (120 * HZ) /* 3 hangs within 120s? Banned! */ + + /** remap_slice: Bitmask of cache lines that need remapping */ + u8 remap_slice; + + /** handles_vma: rbtree to look up our context specific obj/vma for + * the user handle. (user handles are per fd, but the binding is + * per vm, which may be one per context or shared with the global GTT) + */ + struct radix_tree_root handles_vma; + + /** handles_list: reverse list of all the rbtree entries in use for + * this context, which allows us to free all the allocations on + * context close. + */ + struct list_head handles_list; +}; + +#endif /* __I915_GEM_CONTEXT_TYPES_H__ */ |