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/*

 * Copyright 2008 Advanced Micro Devices, Inc.

 * Copyright 2008 Red Hat Inc.

 * Copyright 2009 Jerome Glisse.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR

 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,

 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

 * OTHER DEALINGS IN THE SOFTWARE.

 *

 * Authors: Dave Airlie

 *          Alex Deucher

 *          Jerome Glisse

 *          Christian König

 */

#include 

#include "radeon.h"

/*

 * IB

 * IBs (Indirect Buffers) and areas of GPU accessible memory where

 * commands are stored.  You can put a pointer to the IB in the

 * command ring and the hw will fetch the commands from the IB

 * and execute them.  Generally userspace acceleration drivers

 * produce command buffers which are send to the kernel and

 * put in IBs for execution by the requested ring.

 */

static int radeon_debugfs_sa_init(struct radeon_device *rdev);

/**

 * radeon_ib_get - request an IB (Indirect Buffer)

 *

 * @rdev: radeon_device pointer

 * @ring: ring index the IB is associated with

 * @ib: IB object returned

 * @size: requested IB size

 *

 * Request an IB (all asics).  IBs are allocated using the

 * suballocator.

 * Returns 0 on success, error on failure.

 */

int radeon_ib_get(struct radeon_device *rdev, int ring,

		  struct radeon_ib *ib, struct radeon_vm *vm,

		  unsigned size)

{

	int r;

	r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo, &ib->sa_bo, size, 256);

	if (r) {

		dev_err(rdev->dev, "failed to get a new IB (%d)\n", r);

		return r;

	}

	radeon_sync_create(&ib->sync);

	ib->ring = ring;

	ib->fence = NULL;

	ib->ptr = radeon_sa_bo_cpu_addr(ib->sa_bo);

	ib->vm = vm;

	if (vm) {

		/* ib pool is bound at RADEON_VA_IB_OFFSET in virtual address

		 * space and soffset is the offset inside the pool bo

		 */

		ib->gpu_addr = ib->sa_bo->soffset + RADEON_VA_IB_OFFSET;

	} else {

		ib->gpu_addr = radeon_sa_bo_gpu_addr(ib->sa_bo);

	}

	ib->is_const_ib = false;

	return 0;

}

/**

 * radeon_ib_free - free an IB (Indirect Buffer)

 *

 * @rdev: radeon_device pointer

 * @ib: IB object to free

 *

 * Free an IB (all asics).

 */

void radeon_ib_free(struct radeon_device *rdev, struct radeon_ib *ib)

{

	radeon_sync_free(rdev, &ib->sync, ib->fence);

	radeon_sa_bo_free(rdev, &ib->sa_bo, ib->fence);

	radeon_fence_unref(&ib->fence);

}

/**

 * radeon_ib_schedule - schedule an IB (Indirect Buffer) on the ring

 *

 * @rdev: radeon_device pointer

 * @ib: IB object to schedule

 * @const_ib: Const IB to schedule (SI only)

 * @hdp_flush: Whether or not to perform an HDP cache flush

 *

 * Schedule an IB on the associated ring (all asics).

 * Returns 0 on success, error on failure.

 *

 * On SI, there are two parallel engines fed from the primary ring,

 * the CE (Constant Engine) and the DE (Drawing Engine).  Since

 * resource descriptors have moved to memory, the CE allows you to

 * prime the caches while the DE is updating register state so that

 * the resource descriptors will be already in cache when the draw is

 * processed.  To accomplish this, the userspace driver submits two

 * IBs, one for the CE and one for the DE.  If there is a CE IB (called

 * a CONST_IB), it will be put on the ring prior to the DE IB.  Prior

 * to SI there was just a DE IB.

 */

int radeon_ib_schedule(struct radeon_device *rdev, struct radeon_ib *ib,

		       struct radeon_ib *const_ib, bool hdp_flush)

{

	struct radeon_ring *ring = &rdev->ring[ib->ring];

	int r = 0;

	if (!ib->length_dw || !ring->ready) {

		/* TODO: Nothings in the ib we should report. */

		dev_err(rdev->dev, "couldn't schedule ib\n");

		return -EINVAL;

	}

	/* 64 dwords should be enough for fence too */

	r = radeon_ring_lock(rdev, ring, 64 + RADEON_NUM_SYNCS * 8);

	if (r) {

		dev_err(rdev->dev, "scheduling IB failed (%d).\n", r);

		return r;

	}

	/* grab a vm id if necessary */

	if (ib->vm) {

		struct radeon_fence *vm_id_fence;

		vm_id_fence = radeon_vm_grab_id(rdev, ib->vm, ib->ring);

		radeon_sync_fence(&ib->sync, vm_id_fence);

	}

	/* sync with other rings */

	r = radeon_sync_rings(rdev, &ib->sync, ib->ring);

	if (r) {

		dev_err(rdev->dev, "failed to sync rings (%d)\n", r);

		radeon_ring_unlock_undo(rdev, ring);

		return r;

	}

	if (ib->vm)

		radeon_vm_flush(rdev, ib->vm, ib->ring,

				ib->sync.last_vm_update);

	if (const_ib) {

		radeon_ring_ib_execute(rdev, const_ib->ring, const_ib);

		radeon_sync_free(rdev, &const_ib->sync, NULL);

	}

	radeon_ring_ib_execute(rdev, ib->ring, ib);

	r = radeon_fence_emit(rdev, &ib->fence, ib->ring);

	if (r) {

		dev_err(rdev->dev, "failed to emit fence for new IB (%d)\n", r);

		radeon_ring_unlock_undo(rdev, ring);

		return r;

	}

	if (const_ib) {

		const_ib->fence = radeon_fence_ref(ib->fence);

	}

	if (ib->vm)

		radeon_vm_fence(rdev, ib->vm, ib->fence);

	radeon_ring_unlock_commit(rdev, ring, hdp_flush);

	return 0;

}

/**

 * radeon_ib_pool_init - Init the IB (Indirect Buffer) pool

 *

 * @rdev: radeon_device pointer

 *

 * Initialize the suballocator to manage a pool of memory

 * for use as IBs (all asics).

 * Returns 0 on success, error on failure.

 */

int radeon_ib_pool_init(struct radeon_device *rdev)

{

	int r;

	if (rdev->ib_pool_ready) {

		return 0;

	}

	if (rdev->family >= CHIP_BONAIRE) {

		r = radeon_sa_bo_manager_init(rdev, &rdev->ring_tmp_bo,

					      RADEON_IB_POOL_SIZE*64*1024,

					      RADEON_GPU_PAGE_SIZE,

					      RADEON_GEM_DOMAIN_GTT,

					      RADEON_GEM_GTT_WC);

	} else {

		/* Before CIK, it's better to stick to cacheable GTT due

		 * to the command stream checking

		 */

		r = radeon_sa_bo_manager_init(rdev, &rdev->ring_tmp_bo,

					      RADEON_IB_POOL_SIZE*64*1024,

					      RADEON_GPU_PAGE_SIZE,

					      RADEON_GEM_DOMAIN_GTT, 0);

	}

	if (r) {

		return r;

	}

	r = radeon_sa_bo_manager_start(rdev, &rdev->ring_tmp_bo);

	if (r) {

		return r;

	}

	rdev->ib_pool_ready = true;

	if (radeon_debugfs_sa_init(rdev)) {

		dev_err(rdev->dev, "failed to register debugfs file for SA\n");

	}

	return 0;

}

/**

 * radeon_ib_pool_fini - Free the IB (Indirect Buffer) pool

 *

 * @rdev: radeon_device pointer

 *

 * Tear down the suballocator managing the pool of memory

 * for use as IBs (all asics).

 */

void radeon_ib_pool_fini(struct radeon_device *rdev)

{

	if (rdev->ib_pool_ready) {

		radeon_sa_bo_manager_suspend(rdev, &rdev->ring_tmp_bo);

		radeon_sa_bo_manager_fini(rdev, &rdev->ring_tmp_bo);

		rdev->ib_pool_ready = false;

	}

}

/**

 * radeon_ib_ring_tests - test IBs on the rings

 *

 * @rdev: radeon_device pointer

 *

 * Test an IB (Indirect Buffer) on each ring.

 * If the test fails, disable the ring.

 * Returns 0 on success, error if the primary GFX ring

 * IB test fails.

 */

int radeon_ib_ring_tests(struct radeon_device *rdev)

{

	unsigned i;

	int r;

	for (i = 0; i < RADEON_NUM_RINGS; ++i) {

		struct radeon_ring *ring = &rdev->ring[i];

		if (!ring->ready)

			continue;

		r = radeon_ib_test(rdev, i, ring);

		if (r) {

			radeon_fence_driver_force_completion(rdev, i);

			ring->ready = false;

			rdev->needs_reset = false;

			if (i == RADEON_RING_TYPE_GFX_INDEX) {

				/* oh, oh, that's really bad */

				DRM_ERROR("radeon: failed testing IB on GFX ring (%d).\n", r);

				rdev->accel_working = false;

				return r;

			} else {

				/* still not good, but we can live with it */

				DRM_ERROR("radeon: failed testing IB on ring %d (%d).\n", i, r);

			}

		}

	}

	return 0;

}

/*

 * Debugfs info

 */

#if defined(CONFIG_DEBUG_FS)

static int radeon_debugfs_sa_info(struct seq_file *m, void *data)

{

	struct drm_info_node *node = (struct drm_info_node *) m->private;

	struct drm_device *dev = node->minor->dev;

	struct radeon_device *rdev = dev->dev_private;

	radeon_sa_bo_dump_debug_info(&rdev->ring_tmp_bo, m);

	return 0;

}

static struct drm_info_list radeon_debugfs_sa_list[] = {

	{"radeon_sa_info", &radeon_debugfs_sa_info, 0, NULL},

};

#endif

static int radeon_debugfs_sa_init(struct radeon_device *rdev)

{

#if defined(CONFIG_DEBUG_FS)

	return radeon_debugfs_add_files(rdev, radeon_debugfs_sa_list, 1);

#else

	return 0;

#endif

}