[PATCH 01/10] drm/i915: Rename 'flags' to 'dispatch_flags' for better code reading

John.C.Harrison
2014-12-09T12:59:16Z

From: John Harrison <John.C.Harrison@Intel.com>

There is a flags word that is passed through the execbuffer code path all the
way from initial decoding of the user parameters down to the very final dispatch
buffer call. It is simply called 'flags'. Unfortuantely, there are many other
flags words floating around in the same blocks of code. Even more once the GPU
scheduler arrives.

This patch makes it more obvious exactly which flags word is which by renaming
'flags' to 'dispatch_flags'. Note that the bit definitions for this flags word
already have an 'I915_DISPATCH_' prefix on them and so are not quite so
ambiguous.

Change-Id: Ibc858930c4a606763f84750c5008af07cf245a90
For: VIZ-1587
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
---
drivers/gpu/drm/i915/i915_gem_execbuffer.c | 23 ++++++++++++-----------
drivers/gpu/drm/i915/intel_lrc.c | 6 +++---
drivers/gpu/drm/i915/intel_lrc.h | 2 +-
drivers/gpu/drm/i915/intel_ringbuffer.h | 2 +-
4 files changed, 17 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 0c25f62..aa4566e 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -1071,7 +1071,7 @@ i915_gem_ringbuffer_submission(struct drm_device *dev, struct drm_file *file,
struct drm_i915_gem_execbuffer2 *args,
struct list_head *vmas,
struct drm_i915_gem_object *batch_obj,
- u64 exec_start, u32 flags)
+ u64 exec_start, u32 dispatch_flags)
{
struct drm_clip_rect *cliprects = NULL;
struct drm_i915_private *dev_priv = dev->dev_private;
@@ -1199,19 +1199,19 @@ i915_gem_ringbuffer_submission(struct drm_device *dev, struct drm_file *file,

ret = ring->dispatch_execbuffer(ring,
exec_start, exec_len,
- flags);
+ dispatch_flags);
if (ret)
goto error;
}
} else {
ret = ring->dispatch_execbuffer(ring,
exec_start, exec_len,
- flags);
+ dispatch_flags);
if (ret)
return ret;
}

- trace_i915_gem_ring_dispatch(intel_ring_get_request(ring), flags);
+ trace_i915_gem_ring_dispatch(intel_ring_get_request(ring), dispatch_flags);

i915_gem_execbuffer_move_to_active(vmas, ring);
i915_gem_execbuffer_retire_commands(dev, file, ring, batch_obj);
@@ -1285,7 +1285,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
struct i915_address_space *vm;
const u32 ctx_id = i915_execbuffer2_get_context_id(*args);
u64 exec_start = args->batch_start_offset;
- u32 flags;
+ u32 dispatch_flags;
int ret;
bool need_relocs;

@@ -1296,15 +1296,15 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
if (ret)
return ret;

- flags = 0;
+ dispatch_flags = 0;
if (args->flags & I915_EXEC_SECURE) {
if (!file->is_master || !capable(CAP_SYS_ADMIN))
return -EPERM;

- flags |= I915_DISPATCH_SECURE;
+ dispatch_flags |= I915_DISPATCH_SECURE;
}
if (args->flags & I915_EXEC_IS_PINNED)
- flags |= I915_DISPATCH_PINNED;
+ dispatch_flags |= I915_DISPATCH_PINNED;

if ((args->flags & I915_EXEC_RING_MASK) > LAST_USER_RING) {
DRM_DEBUG("execbuf with unknown ring: %d\n",
@@ -1421,7 +1421,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
/* snb/ivb/vlv conflate the "batch in ppgtt" bit with the "non-secure
* batch" bit. Hence we need to pin secure batches into the global gtt.
* hsw should have this fixed, but bdw mucks it up again. */
- if (flags & I915_DISPATCH_SECURE) {
+ if (dispatch_flags & I915_DISPATCH_SECURE) {
/*
* So on first glance it looks freaky that we pin the batch here
* outside of the reservation loop. But:
@@ -1441,7 +1441,8 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
exec_start += i915_gem_obj_offset(batch_obj, vm);

ret = dev_priv->gt.do_execbuf(dev, file, ring, ctx, args,
- &eb->vmas, batch_obj, exec_start, flags);
+ &eb->vmas, batch_obj, exec_start,
+ dispatch_flags);

/*
* FIXME: We crucially rely upon the active tracking for the (ppgtt)
@@ -1449,7 +1450,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
* needs to be adjusted to also track the ggtt batch vma properly as
* active.
*/
- if (flags & I915_DISPATCH_SECURE)
+ if (dispatch_flags & I915_DISPATCH_SECURE)
i915_gem_object_ggtt_unpin(batch_obj);
err:
/* the request owns the ref now */
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index a82020e..b8baf11 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -646,7 +646,7 @@ static int execlists_move_to_gpu(struct intel_ringbuffer *ringbuf,
* @vmas: list of vmas.
* @batch_obj: the batchbuffer to submit.
* @exec_start: batchbuffer start virtual address pointer.
- * @flags: translated execbuffer call flags.
+ * @dispatch_flags: translated execbuffer call flags.
*
* This is the evil twin version of i915_gem_ringbuffer_submission. It abstracts
* away the submission details of the execbuffer ioctl call.
@@ -659,7 +659,7 @@ int intel_execlists_submission(struct drm_device *dev, struct drm_file *file,
struct drm_i915_gem_execbuffer2 *args,
struct list_head *vmas,
struct drm_i915_gem_object *batch_obj,
- u64 exec_start, u32 flags)
+ u64 exec_start, u32 dispatch_flags)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_ringbuffer *ringbuf = ctx->engine[ring->id].ringbuf;
@@ -732,7 +732,7 @@ int intel_execlists_submission(struct drm_device *dev, struct drm_file *file,
dev_priv->relative_constants_mode = instp_mode;
}

- ret = ring->emit_bb_start(ringbuf, exec_start, flags);
+ ret = ring->emit_bb_start(ringbuf, exec_start, dispatch_flags);
if (ret)
return ret;

diff --git a/drivers/gpu/drm/i915/intel_lrc.h b/drivers/gpu/drm/i915/intel_lrc.h
index 14b216b..b8d5364 100644
--- a/drivers/gpu/drm/i915/intel_lrc.h
+++ b/drivers/gpu/drm/i915/intel_lrc.h
@@ -80,7 +80,7 @@ int intel_execlists_submission(struct drm_device *dev, struct drm_file *file,
struct drm_i915_gem_execbuffer2 *args,
struct list_head *vmas,
struct drm_i915_gem_object *batch_obj,
- u64 exec_start, u32 flags);
+ u64 exec_start, u32 dispatch_flags);
u32 intel_execlists_ctx_id(struct drm_i915_gem_object *ctx_obj);

/**
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 6dbb6f4..2e0fa7b 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -169,7 +169,7 @@ struct intel_engine_cs {
u32 seqno);
int (*dispatch_execbuffer)(struct intel_engine_cs *ring,
u64 offset, u32 length,
- unsigned flags);
+ unsigned dispatch_flags);
#define I915_DISPATCH_SECURE 0x1
#define I915_DISPATCH_PINNED 0x2
void (*cleanup)(struct intel_engine_cs *ring);
--
1.7.9.5