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drm/i915: Add an i915_gem_vm_lookup helper

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This is the VM equivalent of i915_gem_context_lookup.  It's only used
once in this patch but future patches will need to duplicate this lookup
code so it's better to have it in a helper.

Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210708154835.528166-20-jason@jlekstrand.net
This commit is contained in:
Jason Ekstrand 2021-07-08 10:48:24 -05:00 • committed by Daniel Vetter
parent 263ae12c3c
commit bc2ceb7a08
2 changed files with 15 additions and 5 deletions
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6
drivers/gpu/drm/i915/gem/i915_gem_context.c
View file

@ -1311,11 +1311,7 @@ static int set_ppgtt(struct drm_i915_file_private *file_priv,
if (upper_32_bits(args->value))
return -ENOENT;
rcu_read_lock();
vm = xa_load(&file_priv->vm_xa, args->value);
if (vm && !kref_get_unless_zero(&vm->ref))
vm = NULL;
rcu_read_unlock();
vm = i915_gem_vm_lookup(file_priv, args->value);
if (!vm)
return -ENOENT;

14
drivers/gpu/drm/i915/i915_drv.h
View file

@ -1861,6 +1861,20 @@ i915_gem_context_lookup(struct drm_i915_file_private *file_priv, u32 id)
return ctx;
}
static inline struct i915_address_space *
i915_gem_vm_lookup(struct drm_i915_file_private *file_priv, u32 id)
{
struct i915_address_space *vm;
rcu_read_lock();
vm = xa_load(&file_priv->vm_xa, id);
if (vm && !kref_get_unless_zero(&vm->ref))
vm = NULL;
rcu_read_unlock();
return vm;
}
/* i915_gem_evict.c */
int __must_check i915_gem_evict_something(struct i915_address_space *vm,
u64 min_size, u64 alignment,