i915.c - chromiumos/platform/minigbm - Git at Google

 /*
  * Copyright 2014 The Chromium OS Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */

 #ifdef DRV_I915

 #include <errno.h>
 #include <i915_drm.h>
 #include <stdio.h>
 #include <string.h>
 #include <sys/mman.h>
 #include <xf86drm.h>

 #include "drv_priv.h"
 #include "helpers.h"
 #include "util.h"

 static const uint32_t tileable_formats[] = { DRM_FORMAT_ARGB1555, DRM_FORMAT_ABGR8888,
 					     DRM_FORMAT_ARGB8888, DRM_FORMAT_RGB565,
 					     DRM_FORMAT_XBGR8888, DRM_FORMAT_XRGB1555,
 					     DRM_FORMAT_XRGB8888, DRM_FORMAT_UYVY,
 					     DRM_FORMAT_YUYV };

 static const uint32_t linear_only_formats[] = { DRM_FORMAT_GR88, DRM_FORMAT_R8, DRM_FORMAT_YVU420,
 						DRM_FORMAT_YVU420_ANDROID };

 struct i915_device {
 	int gen;
 };

 static int get_gen(int device_id)
 {
 	const uint16_t gen3_ids[] = { 0x2582, 0x2592, 0x2772, 0x27A2, 0x27AE,
 				      0x29C2, 0x29B2, 0x29D2, 0xA001, 0xA011 };
 	unsigned i;
 	for (i = 0; i < ARRAY_SIZE(gen3_ids); i++)
 		if (gen3_ids[i] == device_id)
 			return 3;

 	return 4;
 }

 static int i915_add_kms_item(struct driver *drv, const struct kms_item *item)
 {
 	uint32_t i;
 	struct combination *combo;

 	/*
 	 * Older hardware can't scanout Y-tiled formats. Newer devices can, and
 	 * report this functionality via format modifiers.
 	 */
 	for (i = 0; i < drv->backend->combos.size; i++) {
 		combo = &drv->backend->combos.data[i];
 		if (combo->format == item->format) {
 			if ((combo->metadata.tiling == I915_TILING_Y &&
 			     item->modifier == I915_FORMAT_MOD_Y_TILED) ||
 			    (combo->metadata.tiling == I915_TILING_X &&
 			     item->modifier == I915_FORMAT_MOD_X_TILED)) {
 				combo->metadata.modifier = item->modifier;
 				combo->usage |= item->usage;
 			} else if (combo->metadata.tiling != I915_TILING_Y) {
 				combo->usage |= item->usage;
 			}
 		}
 	}

 	return 0;
 }

 static int i915_add_combinations(struct driver *drv)
 {
 	int ret;
 	uint32_t i, num_items;
 	struct kms_item *items;
 	struct format_metadata metadata;
 	uint64_t flags = BO_COMMON_USE_MASK;

 	metadata.tiling = I915_TILING_NONE;
 	metadata.priority = 1;
 	metadata.modifier = DRM_FORMAT_MOD_NONE;

 	ret = drv_add_combinations(drv, linear_only_formats, ARRAY_SIZE(linear_only_formats),
 				   &metadata, flags);
 	if (ret)
 		return ret;

 	ret = drv_add_combinations(drv, tileable_formats, ARRAY_SIZE(tileable_formats), &metadata,
 				   flags);
 	if (ret)
 		return ret;

 	drv_modify_combination(drv, DRM_FORMAT_XRGB8888, &metadata, BO_USE_CURSOR | BO_USE_SCANOUT);
 	drv_modify_combination(drv, DRM_FORMAT_ARGB8888, &metadata, BO_USE_CURSOR | BO_USE_SCANOUT);

 	flags &= ~BO_USE_SW_WRITE_OFTEN;
 	flags &= ~BO_USE_SW_READ_OFTEN;
 	flags &= ~BO_USE_LINEAR;

 	metadata.tiling = I915_TILING_X;
 	metadata.priority = 2;

 	ret = drv_add_combinations(drv, tileable_formats, ARRAY_SIZE(tileable_formats), &metadata,
 				   flags);
 	if (ret)
 		return ret;

 	metadata.tiling = I915_TILING_Y;
 	metadata.priority = 3;

 	ret = drv_add_combinations(drv, tileable_formats, ARRAY_SIZE(tileable_formats), &metadata,
 				   flags);
 	if (ret)
 		return ret;

 	items = drv_query_kms(drv, &num_items);
 	if (!items || !num_items)
 		return 0;

 	for (i = 0; i < num_items; i++) {
 		ret = i915_add_kms_item(drv, &items[i]);
 		if (ret) {
 			free(items);
 			return ret;
 		}
 	}

 	free(items);
 	return 0;
 }

 static int i915_align_dimensions(struct bo *bo, uint32_t tiling, uint32_t *stride,
 				 uint32_t *aligned_height)
 {
 	struct i915_device *i915 = bo->drv->priv;
 	uint32_t horizontal_alignment = 4;
 	uint32_t vertical_alignment = 4;

 	switch (tiling) {
 	default:
 	case I915_TILING_NONE:
 		horizontal_alignment = 64;
 		break;

 	case I915_TILING_X:
 		horizontal_alignment = 512;
 		vertical_alignment = 8;
 		break;

 	case I915_TILING_Y:
 		if (i915->gen == 3) {
 			horizontal_alignment = 512;
 			vertical_alignment = 8;
 		} else {
 			horizontal_alignment = 128;
 			vertical_alignment = 32;
 		}
 		break;
 	}

 	*aligned_height = ALIGN(bo->height, vertical_alignment);
 	if (i915->gen > 3) {
 		*stride = ALIGN(*stride, horizontal_alignment);
 	} else {
 		while (*stride > horizontal_alignment)
 			horizontal_alignment <<= 1;

 		*stride = horizontal_alignment;
 	}

 	if (i915->gen <= 3 && *stride > 8192)
 		return -EINVAL;

 	return 0;
 }

 static int i915_init(struct driver *drv)
 {
 	int ret;
 	int device_id;
 	struct i915_device *i915;
 	drm_i915_getparam_t get_param;

 	i915 = calloc(1, sizeof(*i915));
 	if (!i915)
 		return -ENOMEM;

 	memset(&get_param, 0, sizeof(get_param));
 	get_param.param = I915_PARAM_CHIPSET_ID;
 	get_param.value = &device_id;
 	ret = drmIoctl(drv->fd, DRM_IOCTL_I915_GETPARAM, &get_param);
 	if (ret) {
 		fprintf(stderr, "drv: DRM_IOCTL_I915_GETPARAM failed\n");
 		free(i915);
 		return -EINVAL;
 	}

 	i915->gen = get_gen(device_id);
 	drv->priv = i915;

 	return i915_add_combinations(drv);
 }

 static int i915_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
 			  uint32_t flags)
 {
 	int ret;
 	size_t plane;
 	uint32_t stride;
 	struct drm_i915_gem_create gem_create;
 	struct drm_i915_gem_set_tiling gem_set_tiling;

 	if (flags & (BO_USE_CURSOR | BO_USE_LINEAR | BO_USE_SW_READ_OFTEN | BO_USE_SW_WRITE_OFTEN))
 		bo->tiling = I915_TILING_NONE;
 	else if (flags & BO_USE_SCANOUT)
 		bo->tiling = I915_TILING_X;
 	else
 		bo->tiling = I915_TILING_Y;

 	stride = drv_stride_from_format(format, width, 0);
 	/*
 	 * Align the Y plane to 128 bytes so the chroma planes would be aligned
 	 * to 64 byte boundaries. This is an Intel HW requirement.
 	 */
 	if (format == DRM_FORMAT_YVU420 || format == DRM_FORMAT_YVU420_ANDROID) {
 		stride = ALIGN(stride, 128);
 		bo->tiling = I915_TILING_NONE;
 	}

 	ret = i915_align_dimensions(bo, bo->tiling, &stride, &height);
 	if (ret)
 		return ret;

 	drv_bo_from_format(bo, stride, height, format);

 	memset(&gem_create, 0, sizeof(gem_create));
 	gem_create.size = bo->total_size;

 	ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_CREATE, &gem_create);
 	if (ret) {
 		fprintf(stderr, "drv: DRM_IOCTL_I915_GEM_CREATE failed (size=%llu)\n",
 			gem_create.size);
 		return ret;
 	}

 	for (plane = 0; plane < bo->num_planes; plane++)
 		bo->handles[plane].u32 = gem_create.handle;

 	memset(&gem_set_tiling, 0, sizeof(gem_set_tiling));
 	gem_set_tiling.handle = bo->handles[0].u32;
 	gem_set_tiling.tiling_mode = bo->tiling;
 	gem_set_tiling.stride = bo->strides[0];

 	ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_SET_TILING, &gem_set_tiling);
 	if (ret) {
 		struct drm_gem_close gem_close;
 		memset(&gem_close, 0, sizeof(gem_close));
 		gem_close.handle = bo->handles[0].u32;
 		drmIoctl(bo->drv->fd, DRM_IOCTL_GEM_CLOSE, &gem_close);

 		fprintf(stderr, "drv: DRM_IOCTL_I915_GEM_SET_TILING failed with %d", errno);
 		return -errno;
 	}

 	return 0;
 }

 static void i915_close(struct driver *drv)
 {
 	free(drv->priv);
 	drv->priv = NULL;
 }

 static void *i915_bo_map(struct bo *bo, struct map_info *data, size_t plane)
 {
 	int ret;
 	struct drm_i915_gem_mmap_gtt gem_map;

 	memset(&gem_map, 0, sizeof(gem_map));
 	gem_map.handle = bo->handles[0].u32;

 	ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_MMAP_GTT, &gem_map);
 	if (ret) {
 		fprintf(stderr, "drv: DRM_IOCTL_I915_GEM_MMAP_GTT failed\n");
 		return MAP_FAILED;
 	}

 	data->length = bo->total_size;

 	return mmap(0, bo->total_size, PROT_READ | PROT_WRITE, MAP_SHARED, bo->drv->fd,
 		    gem_map.offset);
 }

 static uint32_t i915_resolve_format(uint32_t format)
 {
 	switch (format) {
 	case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
 		/*HACK: See b/28671744 */
 		return DRM_FORMAT_XBGR8888;
 	case DRM_FORMAT_FLEX_YCbCr_420_888:
 		return DRM_FORMAT_YVU420_ANDROID;
 	default:
 		return format;
 	}
 }

 struct backend backend_i915 = {
 	.name = "i915",
 	.init = i915_init,
 	.close = i915_close,
 	.bo_create = i915_bo_create,
 	.bo_destroy = drv_gem_bo_destroy,
 	.bo_import = drv_prime_bo_import,
 	.bo_map = i915_bo_map,
 	.resolve_format = i915_resolve_format,
 };

 #endif
	/*
	* Copyright 2014 The Chromium OS Authors. All rights reserved.
	* Use of this source code is governed by a BSD-style license that can be
	* found in the LICENSE file.
	*/

	#ifdef DRV_I915

	#include <errno.h>
	#include <i915_drm.h>
	#include <stdio.h>
	#include <string.h>
	#include <sys/mman.h>
	#include <xf86drm.h>

	#include "drv_priv.h"
	#include "helpers.h"
	#include "util.h"

	static const uint32_t tileable_formats[] = { DRM_FORMAT_ARGB1555, DRM_FORMAT_ABGR8888,
	DRM_FORMAT_ARGB8888, DRM_FORMAT_RGB565,
	DRM_FORMAT_XBGR8888, DRM_FORMAT_XRGB1555,
	DRM_FORMAT_XRGB8888, DRM_FORMAT_UYVY,
	DRM_FORMAT_YUYV };

	static const uint32_t linear_only_formats[] = { DRM_FORMAT_GR88, DRM_FORMAT_R8, DRM_FORMAT_YVU420,
	DRM_FORMAT_YVU420_ANDROID };

	struct i915_device {
	int gen;
	};

	static int get_gen(int device_id)
	{
	const uint16_t gen3_ids[] = { 0x2582, 0x2592, 0x2772, 0x27A2, 0x27AE,
	0x29C2, 0x29B2, 0x29D2, 0xA001, 0xA011 };
	unsigned i;
	for (i = 0; i < ARRAY_SIZE(gen3_ids); i++)
	if (gen3_ids[i] == device_id)
	return 3;

	return 4;
	}

	static int i915_add_kms_item(struct driver drv, const struct kms_item item)
	{
	uint32_t i;
	struct combination *combo;

	/*
	* Older hardware can't scanout Y-tiled formats. Newer devices can, and
	* report this functionality via format modifiers.
	*/
	for (i = 0; i < drv->backend->combos.size; i++) {
	combo = &drv->backend->combos.data[i];
	if (combo->format == item->format) {
	if ((combo->metadata.tiling == I915_TILING_Y &&
	item->modifier == I915_FORMAT_MOD_Y_TILED) \|\|
	(combo->metadata.tiling == I915_TILING_X &&
	item->modifier == I915_FORMAT_MOD_X_TILED)) {
	combo->metadata.modifier = item->modifier;
	combo->usage \|= item->usage;
	} else if (combo->metadata.tiling != I915_TILING_Y) {
	combo->usage \|= item->usage;
	}
	}
	}

	return 0;
	}

	static int i915_add_combinations(struct driver *drv)
	{
	int ret;
	uint32_t i, num_items;
	struct kms_item *items;
	struct format_metadata metadata;
	uint64_t flags = BO_COMMON_USE_MASK;

	metadata.tiling = I915_TILING_NONE;
	metadata.priority = 1;
	metadata.modifier = DRM_FORMAT_MOD_NONE;

	ret = drv_add_combinations(drv, linear_only_formats, ARRAY_SIZE(linear_only_formats),
	&metadata, flags);
	if (ret)
	return ret;

	ret = drv_add_combinations(drv, tileable_formats, ARRAY_SIZE(tileable_formats), &metadata,
	flags);
	if (ret)
	return ret;

	drv_modify_combination(drv, DRM_FORMAT_XRGB8888, &metadata, BO_USE_CURSOR \| BO_USE_SCANOUT);
	drv_modify_combination(drv, DRM_FORMAT_ARGB8888, &metadata, BO_USE_CURSOR \| BO_USE_SCANOUT);

	flags &= ~BO_USE_SW_WRITE_OFTEN;
	flags &= ~BO_USE_SW_READ_OFTEN;
	flags &= ~BO_USE_LINEAR;

	metadata.tiling = I915_TILING_X;
	metadata.priority = 2;

	ret = drv_add_combinations(drv, tileable_formats, ARRAY_SIZE(tileable_formats), &metadata,
	flags);
	if (ret)
	return ret;

	metadata.tiling = I915_TILING_Y;
	metadata.priority = 3;

	ret = drv_add_combinations(drv, tileable_formats, ARRAY_SIZE(tileable_formats), &metadata,
	flags);
	if (ret)
	return ret;

	items = drv_query_kms(drv, &num_items);
	if (!items \|\| !num_items)
	return 0;

	for (i = 0; i < num_items; i++) {
	ret = i915_add_kms_item(drv, &items[i]);
	if (ret) {
	free(items);
	return ret;
	}
	}

	free(items);
	return 0;
	}

	static int i915_align_dimensions(struct bo bo, uint32_t tiling, uint32_t stride,
	uint32_t *aligned_height)
	{
	struct i915_device *i915 = bo->drv->priv;
	uint32_t horizontal_alignment = 4;
	uint32_t vertical_alignment = 4;

	switch (tiling) {
	default:
	case I915_TILING_NONE:
	horizontal_alignment = 64;
	break;

	case I915_TILING_X:
	horizontal_alignment = 512;
	vertical_alignment = 8;
	break;

	case I915_TILING_Y:
	if (i915->gen == 3) {
	horizontal_alignment = 512;
	vertical_alignment = 8;
	} else {
	horizontal_alignment = 128;
	vertical_alignment = 32;
	}
	break;
	}

	*aligned_height = ALIGN(bo->height, vertical_alignment);
	if (i915->gen > 3) {
	stride = ALIGN(stride, horizontal_alignment);
	} else {
	while (*stride > horizontal_alignment)
	horizontal_alignment <<= 1;

	*stride = horizontal_alignment;
	}

	if (i915->gen <= 3 && *stride > 8192)
	return -EINVAL;

	return 0;
	}

	static int i915_init(struct driver *drv)
	{
	int ret;
	int device_id;
	struct i915_device *i915;
	drm_i915_getparam_t get_param;

	i915 = calloc(1, sizeof(*i915));
	if (!i915)
	return -ENOMEM;

	memset(&get_param, 0, sizeof(get_param));
	get_param.param = I915_PARAM_CHIPSET_ID;
	get_param.value = &device_id;
	ret = drmIoctl(drv->fd, DRM_IOCTL_I915_GETPARAM, &get_param);
	if (ret) {
	fprintf(stderr, "drv: DRM_IOCTL_I915_GETPARAM failed\n");
	free(i915);
	return -EINVAL;
	}

	i915->gen = get_gen(device_id);
	drv->priv = i915;

	return i915_add_combinations(drv);
	}

	static int i915_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
	uint32_t flags)
	{
	int ret;
	size_t plane;
	uint32_t stride;
	struct drm_i915_gem_create gem_create;
	struct drm_i915_gem_set_tiling gem_set_tiling;

	if (flags & (BO_USE_CURSOR \| BO_USE_LINEAR \| BO_USE_SW_READ_OFTEN \| BO_USE_SW_WRITE_OFTEN))
	bo->tiling = I915_TILING_NONE;
	else if (flags & BO_USE_SCANOUT)
	bo->tiling = I915_TILING_X;
	else
	bo->tiling = I915_TILING_Y;

	stride = drv_stride_from_format(format, width, 0);
	/*
	* Align the Y plane to 128 bytes so the chroma planes would be aligned
	* to 64 byte boundaries. This is an Intel HW requirement.
	*/
	if (format == DRM_FORMAT_YVU420 \|\| format == DRM_FORMAT_YVU420_ANDROID) {
	stride = ALIGN(stride, 128);
	bo->tiling = I915_TILING_NONE;
	}

	ret = i915_align_dimensions(bo, bo->tiling, &stride, &height);
	if (ret)
	return ret;

	drv_bo_from_format(bo, stride, height, format);

	memset(&gem_create, 0, sizeof(gem_create));
	gem_create.size = bo->total_size;

	ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_CREATE, &gem_create);
	if (ret) {
	fprintf(stderr, "drv: DRM_IOCTL_I915_GEM_CREATE failed (size=%llu)\n",
	gem_create.size);
	return ret;
	}

	for (plane = 0; plane < bo->num_planes; plane++)
	bo->handles[plane].u32 = gem_create.handle;

	memset(&gem_set_tiling, 0, sizeof(gem_set_tiling));
	gem_set_tiling.handle = bo->handles[0].u32;
	gem_set_tiling.tiling_mode = bo->tiling;
	gem_set_tiling.stride = bo->strides[0];

	ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_SET_TILING, &gem_set_tiling);
	if (ret) {
	struct drm_gem_close gem_close;
	memset(&gem_close, 0, sizeof(gem_close));
	gem_close.handle = bo->handles[0].u32;
	drmIoctl(bo->drv->fd, DRM_IOCTL_GEM_CLOSE, &gem_close);

	fprintf(stderr, "drv: DRM_IOCTL_I915_GEM_SET_TILING failed with %d", errno);
	return -errno;
	}

	return 0;
	}

	static void i915_close(struct driver *drv)
	{
	free(drv->priv);
	drv->priv = NULL;
	}

	static void i915_bo_map(struct bo bo, struct map_info *data, size_t plane)
	{
	int ret;
	struct drm_i915_gem_mmap_gtt gem_map;

	memset(&gem_map, 0, sizeof(gem_map));
	gem_map.handle = bo->handles[0].u32;

	ret = drmIoctl(bo->drv->fd, DRM_IOCTL_I915_GEM_MMAP_GTT, &gem_map);
	if (ret) {
	fprintf(stderr, "drv: DRM_IOCTL_I915_GEM_MMAP_GTT failed\n");
	return MAP_FAILED;
	}

	data->length = bo->total_size;

	return mmap(0, bo->total_size, PROT_READ \| PROT_WRITE, MAP_SHARED, bo->drv->fd,
	gem_map.offset);
	}

	static uint32_t i915_resolve_format(uint32_t format)
	{
	switch (format) {
	case DRM_FORMAT_FLEX_IMPLEMENTATION_DEFINED:
	/HACK: See b/28671744 /
	return DRM_FORMAT_XBGR8888;
	case DRM_FORMAT_FLEX_YCbCr_420_888:
	return DRM_FORMAT_YVU420_ANDROID;
	default:
	return format;
	}
	}

	struct backend backend_i915 = {
	.name = "i915",
	.init = i915_init,
	.close = i915_close,
	.bo_create = i915_bo_create,
	.bo_destroy = drv_gem_bo_destroy,
	.bo_import = drv_prime_bo_import,
	.bo_map = i915_bo_map,
	.resolve_format = i915_resolve_format,
	};

	#endif