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Commit ee1b1e5e authored by Oscar Mateo's avatar Oscar Mateo Committed by Daniel Vetter
Browse files

drm/i915: Split the ringbuffers from the rings (2/3) 



This refactoring has been performed using the following Coccinelle
semantic script:

    @@
    struct intel_engine_cs r;
    @@
    (
    - (r).obj
    + r.buffer->obj
    |
    - (r).virtual_start
    + r.buffer->virtual_start
    |
    - (r).head
    + r.buffer->head
    |
    - (r).tail
    + r.buffer->tail
    |
    - (r).space
    + r.buffer->space
    |
    - (r).size
    + r.buffer->size
    |
    - (r).effective_size
    + r.buffer->effective_size
    |
    - (r).last_retired_head
    + r.buffer->last_retired_head
    )

    @@
    struct intel_engine_cs *r;
    @@
    (
    - (r)->obj
    + r->buffer->obj
    |
    - (r)->virtual_start
    + r->buffer->virtual_start
    |
    - (r)->head
    + r->buffer->head
    |
    - (r)->tail
    + r->buffer->tail
    |
    - (r)->space
    + r->buffer->space
    |
    - (r)->size
    + r->buffer->size
    |
    - (r)->effective_size
    + r->buffer->effective_size
    |
    - (r)->last_retired_head
    + r->buffer->last_retired_head
    )

    @@
    expression E;
    @@
    (
    - LP_RING(E)->obj
    + LP_RING(E)->buffer->obj
    |
    - LP_RING(E)->virtual_start
    + LP_RING(E)->buffer->virtual_start
    |
    - LP_RING(E)->head
    + LP_RING(E)->buffer->head
    |
    - LP_RING(E)->tail
    + LP_RING(E)->buffer->tail
    |
    - LP_RING(E)->space
    + LP_RING(E)->buffer->space
    |
    - LP_RING(E)->size
    + LP_RING(E)->buffer->size
    |
    - LP_RING(E)->effective_size
    + LP_RING(E)->buffer->effective_size
    |
    - LP_RING(E)->last_retired_head
    + LP_RING(E)->buffer->last_retired_head
    )

Note: On top of this this patch also removes the now unused ringbuffer
fields in intel_engine_cs.

Signed-off-by: default avatarOscar Mateo <oscar.mateo@intel.com>
[danvet: Add note about fixup patch included here.]
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 8ee14975

drivers/gpu/drm/i915/i915_dma.c

+11 −11
Original line number Diff line number Diff line
@@ -64,7 +64,7 @@ 
 * has access to the ring.

 */

#define RING_LOCK_TEST_WITH_RETURN(dev, file) do {			\

	if (LP_RING(dev->dev_private)->obj == NULL)			\

	if (LP_RING(dev->dev_private)->buffer->obj == NULL)			\

		LOCK_TEST_WITH_RETURN(dev, file);			\

} while (0)
@@ -149,17 +149,17 @@ void i915_kernel_lost_context(struct drm_device * dev) 
	if (drm_core_check_feature(dev, DRIVER_MODESET))

		return;



	ring->head = I915_READ_HEAD(ring) & HEAD_ADDR;

	ring->tail = I915_READ_TAIL(ring) & TAIL_ADDR;

	ring->space = ring->head - (ring->tail + I915_RING_FREE_SPACE);

	if (ring->space < 0)

		ring->space += ring->size;

	ring->buffer->head = I915_READ_HEAD(ring) & HEAD_ADDR;

	ring->buffer->tail = I915_READ_TAIL(ring) & TAIL_ADDR;

	ring->buffer->space = ring->buffer->head - (ring->buffer->tail + I915_RING_FREE_SPACE);

	if (ring->buffer->space < 0)

		ring->buffer->space += ring->buffer->size;



	if (!dev->primary->master)

		return;



	master_priv = dev->primary->master->driver_priv;

	if (ring->head == ring->tail && master_priv->sarea_priv)

	if (ring->buffer->head == ring->buffer->tail && master_priv->sarea_priv)

		master_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;

}
@@ -202,7 +202,7 @@ static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init) 
	}



	if (init->ring_size != 0) {

		if (LP_RING(dev_priv)->obj != NULL) {

		if (LP_RING(dev_priv)->buffer->obj != NULL) {

			i915_dma_cleanup(dev);

			DRM_ERROR("Client tried to initialize ringbuffer in "

				  "GEM mode\n");
@@ -239,7 +239,7 @@ static int i915_dma_resume(struct drm_device * dev) 


	DRM_DEBUG_DRIVER("%s\n", __func__);



	if (ring->virtual_start == NULL) {

	if (ring->buffer->virtual_start == NULL) {

		DRM_ERROR("can not ioremap virtual address for"

			  " ring buffer\n");

		return -ENOMEM;
@@ -361,7 +361,7 @@ static int i915_emit_cmds(struct drm_device * dev, int *buffer, int dwords) 
	struct drm_i915_private *dev_priv = dev->dev_private;

	int i, ret;



	if ((dwords+1) * sizeof(int) >= LP_RING(dev_priv)->size - 8)

	if ((dwords+1) * sizeof(int) >= LP_RING(dev_priv)->buffer->size - 8)

		return -EINVAL;



	for (i = 0; i < dwords;) {
@@ -824,7 +824,7 @@ static int i915_irq_emit(struct drm_device *dev, void *data, 
	if (drm_core_check_feature(dev, DRIVER_MODESET))

		return -ENODEV;



	if (!dev_priv || !LP_RING(dev_priv)->virtual_start) {

	if (!dev_priv || !LP_RING(dev_priv)->buffer->virtual_start) {

		DRM_ERROR("called with no initialization\n");

		return -EINVAL;

	}

drivers/gpu/drm/i915/i915_gem.c

+1 −1
Original line number Diff line number Diff line
@@ -2523,7 +2523,7 @@ i915_gem_retire_requests_ring(struct intel_engine_cs *ring) 
		 * of tail of the request to update the last known position

		 * of the GPU head.

		 */

		ring->last_retired_head = request->tail;

		ring->buffer->last_retired_head = request->tail;



		i915_gem_free_request(request);

	}

drivers/gpu/drm/i915/i915_gpu_error.c

+3 −3
Original line number Diff line number Diff line
@@ -825,8 +825,8 @@ static void i915_record_ring_state(struct drm_device *dev, 
		ering->hws = I915_READ(mmio);

	}



	ering->cpu_ring_head = ring->head;

	ering->cpu_ring_tail = ring->tail;

	ering->cpu_ring_head = ring->buffer->head;

	ering->cpu_ring_tail = ring->buffer->tail;



	ering->hangcheck_score = ring->hangcheck.score;

	ering->hangcheck_action = ring->hangcheck.action;
@@ -930,7 +930,7 @@ static void i915_gem_record_rings(struct drm_device *dev, 
		}



		error->ring[i].ringbuffer =

			i915_error_ggtt_object_create(dev_priv, ring->obj);

			i915_error_ggtt_object_create(dev_priv, ring->buffer->obj);



		if (ring->status_page.obj)

			error->ring[i].hws_page =

drivers/gpu/drm/i915/i915_irq.c

+4 −4
Original line number Diff line number Diff line
@@ -1219,7 +1219,7 @@ static void ironlake_rps_change_irq_handler(struct drm_device *dev) 
static void notify_ring(struct drm_device *dev,

			struct intel_engine_cs *ring)

{

	if (ring->obj == NULL)

	if (ring->buffer->obj == NULL)

		return;



	trace_i915_gem_request_complete(ring);
@@ -2837,10 +2837,10 @@ semaphore_waits_for(struct intel_engine_cs *ring, u32 *seqno) 
		 * our ring is smaller than what the hardware (and hence

		 * HEAD_ADDR) allows. Also handles wrap-around.

		 */

		head &= ring->size - 1;

		head &= ring->buffer->size - 1;



		/* This here seems to blow up */

		cmd = ioread32(ring->virtual_start + head);

		cmd = ioread32(ring->buffer->virtual_start + head);

		if (cmd == ipehr)

			break;
@@ -2850,7 +2850,7 @@ semaphore_waits_for(struct intel_engine_cs *ring, u32 *seqno) 
	if (!i)

		return NULL;



	*seqno = ioread32(ring->virtual_start + head + 4) + 1;

	*seqno = ioread32(ring->buffer->virtual_start + head + 4) + 1;

	return semaphore_wait_to_signaller_ring(ring, ipehr);

}

drivers/gpu/drm/i915/intel_ringbuffer.c

+51 −51
Original line number Diff line number Diff line
@@ -50,7 +50,7 @@ static inline int __ring_space(int head, int tail, int size) 


static inline int ring_space(struct intel_engine_cs *ring)

{

	return __ring_space(ring->head & HEAD_ADDR, ring->tail, ring->size);

	return __ring_space(ring->buffer->head & HEAD_ADDR, ring->buffer->tail, ring->buffer->size);

}



static bool intel_ring_stopped(struct intel_engine_cs *ring)
@@ -61,10 +61,10 @@ static bool intel_ring_stopped(struct intel_engine_cs *ring) 


void __intel_ring_advance(struct intel_engine_cs *ring)

{

	ring->tail &= ring->size - 1;

	ring->buffer->tail &= ring->buffer->size - 1;

	if (intel_ring_stopped(ring))

		return;

	ring->write_tail(ring, ring->tail);

	ring->write_tail(ring, ring->buffer->tail);

}



static int
@@ -481,7 +481,7 @@ static int init_ring_common(struct intel_engine_cs *ring) 
{

	struct drm_device *dev = ring->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct drm_i915_gem_object *obj = ring->obj;

	struct drm_i915_gem_object *obj = ring->buffer->obj;

	int ret = 0;



	gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
@@ -520,7 +520,7 @@ static int init_ring_common(struct intel_engine_cs *ring) 
	 * register values. */

	I915_WRITE_START(ring, i915_gem_obj_ggtt_offset(obj));

	I915_WRITE_CTL(ring,

			((ring->size - PAGE_SIZE) & RING_NR_PAGES)

			((ring->buffer->size - PAGE_SIZE) & RING_NR_PAGES)

			| RING_VALID);



	/* If the head is still not zero, the ring is dead */
@@ -540,10 +540,10 @@ static int init_ring_common(struct intel_engine_cs *ring) 
	if (!drm_core_check_feature(ring->dev, DRIVER_MODESET))

		i915_kernel_lost_context(ring->dev);

	else {

		ring->head = I915_READ_HEAD(ring);

		ring->tail = I915_READ_TAIL(ring) & TAIL_ADDR;

		ring->space = ring_space(ring);

		ring->last_retired_head = -1;

		ring->buffer->head = I915_READ_HEAD(ring);

		ring->buffer->tail = I915_READ_TAIL(ring) & TAIL_ADDR;

		ring->buffer->space = ring_space(ring);

		ring->buffer->last_retired_head = -1;

	}



	memset(&ring->hangcheck, 0, sizeof(ring->hangcheck));
@@ -1382,14 +1382,14 @@ static int allocate_ring_buffer(struct intel_engine_cs *ring) 
	struct drm_i915_gem_object *obj;

	int ret;



	if (ring->obj)

	if (ring->buffer->obj)

		return 0;



	obj = NULL;

	if (!HAS_LLC(dev))

		obj = i915_gem_object_create_stolen(dev, ring->size);

		obj = i915_gem_object_create_stolen(dev, ring->buffer->size);

	if (obj == NULL)

		obj = i915_gem_alloc_object(dev, ring->size);

		obj = i915_gem_alloc_object(dev, ring->buffer->size);

	if (obj == NULL)

		return -ENOMEM;
@@ -1401,15 +1401,15 @@ static int allocate_ring_buffer(struct intel_engine_cs *ring) 
	if (ret)

		goto err_unpin;



	ring->virtual_start =

	ring->buffer->virtual_start =

		ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),

			   ring->size);

	if (ring->virtual_start == NULL) {

			   ring->buffer->size);

	if (ring->buffer->virtual_start == NULL) {

		ret = -EINVAL;

		goto err_unpin;

	}



	ring->obj = obj;

	ring->buffer->obj = obj;

	return 0;



err_unpin:
@@ -1435,7 +1435,7 @@ static int intel_init_ring_buffer(struct drm_device *dev, 
	ring->dev = dev;

	INIT_LIST_HEAD(&ring->active_list);

	INIT_LIST_HEAD(&ring->request_list);

	ring->size = 32 * PAGE_SIZE;

	ring->buffer->size = 32 * PAGE_SIZE;

	memset(ring->semaphore.sync_seqno, 0, sizeof(ring->semaphore.sync_seqno));



	init_waitqueue_head(&ring->irq_queue);
@@ -1461,9 +1461,9 @@ static int intel_init_ring_buffer(struct drm_device *dev, 
	 * the TAIL pointer points to within the last 2 cachelines

	 * of the buffer.

	 */

	ring->effective_size = ring->size;

	ring->buffer->effective_size = ring->buffer->size;

	if (IS_I830(dev) || IS_845G(dev))

		ring->effective_size -= 2 * CACHELINE_BYTES;

		ring->buffer->effective_size -= 2 * CACHELINE_BYTES;



	ret = i915_cmd_parser_init_ring(ring);

	if (ret)
@@ -1485,17 +1485,17 @@ void intel_cleanup_ring_buffer(struct intel_engine_cs *ring) 
{

	struct drm_i915_private *dev_priv = to_i915(ring->dev);



	if (ring->obj == NULL)

	if (ring->buffer->obj == NULL)

		return;



	intel_stop_ring_buffer(ring);

	WARN_ON((I915_READ_MODE(ring) & MODE_IDLE) == 0);



	iounmap(ring->virtual_start);

	iounmap(ring->buffer->virtual_start);



	i915_gem_object_ggtt_unpin(ring->obj);

	drm_gem_object_unreference(&ring->obj->base);

	ring->obj = NULL;

	i915_gem_object_ggtt_unpin(ring->buffer->obj);

	drm_gem_object_unreference(&ring->buffer->obj->base);

	ring->buffer->obj = NULL;

	ring->preallocated_lazy_request = NULL;

	ring->outstanding_lazy_seqno = 0;
@@ -1516,17 +1516,17 @@ static int intel_ring_wait_request(struct intel_engine_cs *ring, int n) 
	u32 seqno = 0;

	int ret;



	if (ring->last_retired_head != -1) {

		ring->head = ring->last_retired_head;

		ring->last_retired_head = -1;

	if (ring->buffer->last_retired_head != -1) {

		ring->buffer->head = ring->buffer->last_retired_head;

		ring->buffer->last_retired_head = -1;



		ring->space = ring_space(ring);

		if (ring->space >= n)

		ring->buffer->space = ring_space(ring);

		if (ring->buffer->space >= n)

			return 0;

	}



	list_for_each_entry(request, &ring->request_list, list) {

		if (__ring_space(request->tail, ring->tail, ring->size) >= n) {

		if (__ring_space(request->tail, ring->buffer->tail, ring->buffer->size) >= n) {

			seqno = request->seqno;

			break;

		}
@@ -1540,10 +1540,10 @@ static int intel_ring_wait_request(struct intel_engine_cs *ring, int n) 
		return ret;



	i915_gem_retire_requests_ring(ring);

	ring->head = ring->last_retired_head;

	ring->last_retired_head = -1;

	ring->buffer->head = ring->buffer->last_retired_head;

	ring->buffer->last_retired_head = -1;



	ring->space = ring_space(ring);

	ring->buffer->space = ring_space(ring);

	return 0;

}
@@ -1570,9 +1570,9 @@ static int ring_wait_for_space(struct intel_engine_cs *ring, int n) 


	trace_i915_ring_wait_begin(ring);

	do {

		ring->head = I915_READ_HEAD(ring);

		ring->space = ring_space(ring);

		if (ring->space >= n) {

		ring->buffer->head = I915_READ_HEAD(ring);

		ring->buffer->space = ring_space(ring);

		if (ring->buffer->space >= n) {

			ret = 0;

			break;

		}
@@ -1608,21 +1608,21 @@ static int ring_wait_for_space(struct intel_engine_cs *ring, int n) 
static int intel_wrap_ring_buffer(struct intel_engine_cs *ring)

{

	uint32_t __iomem *virt;

	int rem = ring->size - ring->tail;

	int rem = ring->buffer->size - ring->buffer->tail;



	if (ring->space < rem) {

	if (ring->buffer->space < rem) {

		int ret = ring_wait_for_space(ring, rem);

		if (ret)

			return ret;

	}



	virt = ring->virtual_start + ring->tail;

	virt = ring->buffer->virtual_start + ring->buffer->tail;

	rem /= 4;

	while (rem--)

		iowrite32(MI_NOOP, virt++);



	ring->tail = 0;

	ring->space = ring_space(ring);

	ring->buffer->tail = 0;

	ring->buffer->space = ring_space(ring);



	return 0;

}
@@ -1674,13 +1674,13 @@ static int __intel_ring_prepare(struct intel_engine_cs *ring, 
{

	int ret;



	if (unlikely(ring->tail + bytes > ring->effective_size)) {

	if (unlikely(ring->buffer->tail + bytes > ring->buffer->effective_size)) {

		ret = intel_wrap_ring_buffer(ring);

		if (unlikely(ret))

			return ret;

	}



	if (unlikely(ring->space < bytes)) {

	if (unlikely(ring->buffer->space < bytes)) {

		ret = ring_wait_for_space(ring, bytes);

		if (unlikely(ret))

			return ret;
@@ -1709,14 +1709,14 @@ int intel_ring_begin(struct intel_engine_cs *ring, 
	if (ret)

		return ret;



	ring->space -= num_dwords * sizeof(uint32_t);

	ring->buffer->space -= num_dwords * sizeof(uint32_t);

	return 0;

}



/* Align the ring tail to a cacheline boundary */

int intel_ring_cacheline_align(struct intel_engine_cs *ring)

{

	int num_dwords = (ring->tail & (CACHELINE_BYTES - 1)) / sizeof(uint32_t);

	int num_dwords = (ring->buffer->tail & (CACHELINE_BYTES - 1)) / sizeof(uint32_t);

	int ret;



	if (num_dwords == 0)
@@ -2094,13 +2094,13 @@ int intel_render_ring_init_dri(struct drm_device *dev, u64 start, u32 size) 
	INIT_LIST_HEAD(&ring->active_list);

	INIT_LIST_HEAD(&ring->request_list);



	ring->size = size;

	ring->effective_size = ring->size;

	ring->buffer->size = size;

	ring->buffer->effective_size = ring->buffer->size;

	if (IS_I830(ring->dev) || IS_845G(ring->dev))

		ring->effective_size -= 2 * CACHELINE_BYTES;

		ring->buffer->effective_size -= 2 * CACHELINE_BYTES;



	ring->virtual_start = ioremap_wc(start, size);

	if (ring->virtual_start == NULL) {

	ring->buffer->virtual_start = ioremap_wc(start, size);

	if (ring->buffer->virtual_start == NULL) {

		DRM_ERROR("can not ioremap virtual address for"

			  " ring buffer\n");

		ret = -ENOMEM;
@@ -2116,7 +2116,7 @@ int intel_render_ring_init_dri(struct drm_device *dev, u64 start, u32 size) 
	return 0;



err_vstart:

	iounmap(ring->virtual_start);

	iounmap(ring->buffer->virtual_start);

err_ringbuf:

	kfree(ringbuf);

	ring->buffer = NULL;