On 22/05/16 14:02, Chris Wilson wrote:
As these are wrappers around kref_get/kref_put() it is preferable to
follow the naming convention and use the same verb get/put in our
wrapper names for manipulating a reference to the context.
Not so sure about this one. We got objects, framebuffers and requests
using (un)reference naming so don't see that making contexts different
is a good idea.
Regards,
Tvrtko
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursu...@intel.com>
Cc: Joonas Lahtinen <joonas.lahti...@linux.intel.com>
---
drivers/gpu/drm/i915/i915_drv.h | 6 ++++--
drivers/gpu/drm/i915/i915_gem.c | 7 +++----
drivers/gpu/drm/i915/i915_gem_context.c | 22 ++++++++++------------
drivers/gpu/drm/i915/i915_gem_execbuffer.c | 6 +++---
drivers/gpu/drm/i915/intel_lrc.c | 4 ++--
5 files changed, 22 insertions(+), 23 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index e4e3614335ec..0a3442fcd93e 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -3435,12 +3435,14 @@ i915_gem_context_lookup(struct drm_i915_file_private
*file_priv, u32 id)
return ctx;
}
-static inline void i915_gem_context_reference(struct i915_gem_context *ctx)
+static inline struct i915_gem_context *
+i915_gem_context_get(struct i915_gem_context *ctx)
{
kref_get(&ctx->ref);
+ return ctx;
}
-static inline void i915_gem_context_unreference(struct i915_gem_context *ctx)
+static inline void i915_gem_context_put(struct i915_gem_context *ctx)
{
lockdep_assert_held(&ctx->i915->dev->struct_mutex);
kref_put(&ctx->ref, i915_gem_context_free);
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 728b66911840..d7ae030e5a0b 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1418,7 +1418,7 @@ static void i915_gem_request_retire(struct
drm_i915_gem_request *request)
request->engine);
}
- i915_gem_context_unreference(request->ctx);
+ i915_gem_context_put(request->ctx);
i915_gem_request_unreference(request);
}
@@ -2775,8 +2775,7 @@ __i915_gem_request_alloc(struct intel_engine_cs *engine,
req->i915 = dev_priv;
req->engine = engine;
req->reset_counter = reset_counter;
- req->ctx = ctx;
- i915_gem_context_reference(req->ctx);
+ req->ctx = i915_gem_context_get(ctx);
/*
* Reserve space in the ring buffer for all the commands required to
@@ -2798,7 +2797,7 @@ __i915_gem_request_alloc(struct intel_engine_cs *engine,
return 0;
err_ctx:
- i915_gem_context_unreference(ctx);
+ i915_gem_context_put(ctx);
err:
kmem_cache_free(dev_priv->requests, req);
return ret;
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c
b/drivers/gpu/drm/i915/i915_gem_context.c
index aa329175f73a..a4c6377eea32 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -290,7 +290,7 @@ __create_hw_context(struct drm_device *dev,
return ctx;
err_out:
- i915_gem_context_unreference(ctx);
+ i915_gem_context_put(ctx);
return ERR_PTR(ret);
}
@@ -351,7 +351,7 @@ err_unpin:
i915_gem_object_ggtt_unpin(ctx->legacy_hw_ctx.rcs_state);
err_destroy:
idr_remove(&file_priv->context_idr, ctx->user_handle);
- i915_gem_context_unreference(ctx);
+ i915_gem_context_put(ctx);
return ERR_PTR(ret);
}
@@ -363,7 +363,7 @@ static void i915_gem_context_unpin(struct i915_gem_context
*ctx,
} else {
if (engine->id == RCS && ctx->legacy_hw_ctx.rcs_state)
i915_gem_object_ggtt_unpin(ctx->legacy_hw_ctx.rcs_state);
- i915_gem_context_unreference(ctx);
+ i915_gem_context_put(ctx);
}
}
@@ -463,7 +463,7 @@ void i915_gem_context_fini(struct drm_device *dev)
if (dctx->legacy_hw_ctx.rcs_state)
i915_gem_object_ggtt_unpin(dctx->legacy_hw_ctx.rcs_state);
- i915_gem_context_unreference(dctx);
+ i915_gem_context_put(dctx);
dev_priv->kernel_context = NULL;
ida_destroy(&dev_priv->context_hw_ida);
@@ -473,7 +473,7 @@ static int context_idr_cleanup(int id, void *p, void *data)
{
struct i915_gem_context *ctx = p;
- i915_gem_context_unreference(ctx);
+ i915_gem_context_put(ctx);
return 0;
}
@@ -785,10 +785,9 @@ static int do_rcs_switch(struct drm_i915_gem_request *req)
/* obj is kept alive until the next request by its active ref */
i915_gem_object_ggtt_unpin(from->legacy_hw_ctx.rcs_state);
- i915_gem_context_unreference(from);
+ i915_gem_context_put(from);
}
- i915_gem_context_reference(to);
- engine->last_context = to;
+ engine->last_context = i915_gem_context_get(to);
/* GEN8 does *not* require an explicit reload if the PDPs have been
* setup, and we do not wish to move them.
@@ -873,10 +872,9 @@ int i915_switch_context(struct drm_i915_gem_request *req)
}
if (to != engine->last_context) {
- i915_gem_context_reference(to);
if (engine->last_context)
-
i915_gem_context_unreference(engine->last_context);
- engine->last_context = to;
+ i915_gem_context_put(engine->last_context);
+ engine->last_context = i915_gem_context_get(to);
}
return 0;
@@ -944,7 +942,7 @@ int i915_gem_context_destroy_ioctl(struct drm_device *dev,
void *data,
}
idr_remove(&ctx->file_priv->context_idr, ctx->user_handle);
- i915_gem_context_unreference(ctx);
+ i915_gem_context_put(ctx);
mutex_unlock(&dev->struct_mutex);
DRM_DEBUG_DRIVER("HW context %d destroyed\n", args->ctx_id);
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 84d990331abd..14628ce91273 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -1492,7 +1492,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
goto pre_mutex_err;
}
- i915_gem_context_reference(ctx);
+ i915_gem_context_get(ctx);
if (ctx->ppgtt)
vm = &ctx->ppgtt->base;
@@ -1503,7 +1503,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
eb = eb_create(args);
if (eb == NULL) {
- i915_gem_context_unreference(ctx);
+ i915_gem_context_put(ctx);
mutex_unlock(&dev->struct_mutex);
ret = -ENOMEM;
goto pre_mutex_err;
@@ -1647,7 +1647,7 @@ err_batch_unpin:
err:
/* the request owns the ref now */
- i915_gem_context_unreference(ctx);
+ i915_gem_context_put(ctx);
eb_destroy(eb);
mutex_unlock(&dev->struct_mutex);
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 426dc90aceed..9a55478e23ac 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -966,7 +966,6 @@ static int intel_lr_context_pin(struct i915_gem_context
*ctx,
if (ret)
goto unpin_map;
- i915_gem_context_reference(ctx);
ctx->engine[engine->id].lrc_vma = i915_gem_obj_to_ggtt(ctx_obj);
intel_lr_context_descriptor_update(ctx, engine);
lrc_reg_state[CTX_RING_BUFFER_START+1] = ringbuf->vma->node.start;
@@ -977,6 +976,7 @@ static int intel_lr_context_pin(struct i915_gem_context
*ctx,
if (i915.enable_guc_submission)
I915_WRITE(GEN8_GTCR, GEN8_GTCR_INVALIDATE);
+ i915_gem_context_get(ctx);
return 0;
unpin_map:
@@ -1009,7 +1009,7 @@ void intel_lr_context_unpin(struct i915_gem_context *ctx,
ctx->engine[engine->id].lrc_desc = 0;
ctx->engine[engine->id].lrc_reg_state = NULL;
- i915_gem_context_unreference(ctx);
+ i915_gem_context_put(ctx);
}
static int intel_logical_ring_workarounds_emit(struct drm_i915_gem_request
*req)
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