[linux-2.6-block.git] / drivers / gpu / drm / nouveau / nouveau_sgdma.c

#include <linux/pagemap.h>
#include <linux/slab.h>

#include "nouveau_drm.h"
#include "nouveau_ttm.h"

struct nouveau_sgdma_be {
	/* this has to be the first field so populate/unpopulated in
	 * nouve_bo.c works properly, otherwise have to move them here
	 */
	struct ttm_dma_tt ttm;
	struct nvkm_mem *node;
};

static void
nouveau_sgdma_destroy(struct ttm_tt *ttm)
{
	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;

	if (ttm) {
		ttm_dma_tt_fini(&nvbe->ttm);
		kfree(nvbe);
	}
}

static int
nv04_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *mem)
{
	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
	struct nvkm_mem *node = mem->mm_node;

	if (ttm->sg) {
		node->sg    = ttm->sg;
		node->pages = NULL;
	} else {
		node->sg    = NULL;
		node->pages = nvbe->ttm.dma_address;
	}
	node->size = (mem->num_pages << PAGE_SHIFT) >> 12;

	nvkm_vm_map(&node->vma[0], node);
	nvbe->node = node;
	return 0;
}

static int
nv04_sgdma_unbind(struct ttm_tt *ttm)
{
	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
	nvkm_vm_unmap(&nvbe->node->vma[0]);
	return 0;
}

static struct ttm_backend_func nv04_sgdma_backend = {
	.bind			= nv04_sgdma_bind,
	.unbind			= nv04_sgdma_unbind,
	.destroy		= nouveau_sgdma_destroy
};

static int
nv50_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *mem)
{
	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
	struct nvkm_mem *node = mem->mm_node;

	/* noop: bound in move_notify() */
	if (ttm->sg) {
		node->sg    = ttm->sg;
		node->pages = NULL;
	} else {
		node->sg    = NULL;
		node->pages = nvbe->ttm.dma_address;
	}
	node->size = (mem->num_pages << PAGE_SHIFT) >> 12;
	return 0;
}

static int
nv50_sgdma_unbind(struct ttm_tt *ttm)
{
	/* noop: unbound in move_notify() */
	return 0;
}

static struct ttm_backend_func nv50_sgdma_backend = {
	.bind			= nv50_sgdma_bind,
	.unbind			= nv50_sgdma_unbind,
	.destroy		= nouveau_sgdma_destroy
};

struct ttm_tt *
nouveau_sgdma_create_ttm(struct ttm_bo_device *bdev,
			 unsigned long size, uint32_t page_flags,
			 struct page *dummy_read_page)
{
	struct nouveau_drm *drm = nouveau_bdev(bdev);
	struct nouveau_sgdma_be *nvbe;

	nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL);
	if (!nvbe)
		return NULL;

	if (drm->device.info.family < NV_DEVICE_INFO_V0_TESLA)
		nvbe->ttm.ttm.func = &nv04_sgdma_backend;
	else
		nvbe->ttm.ttm.func = &nv50_sgdma_backend;

	if (ttm_dma_tt_init(&nvbe->ttm, bdev, size, page_flags, dummy_read_page))
		/*
		 * A failing ttm_dma_tt_init() will call ttm_tt_destroy()
		 * and thus our nouveau_sgdma_destroy() hook, so we don't need
		 * to free nvbe here.
		 */
		return NULL;
	return &nvbe->ttm.ttm;
}
Commit	Line	Data
6ee73861	1	#include <linux/pagemap.h>
5a0e3ad6	2	#include <linux/slab.h>
6ee73861	3
ebb945a9 BS	4	#include "nouveau_drm.h"
ebb945a9 BS	5	#include "nouveau_ttm.h"
6ee73861 BS	6
6ee73861 BS	7	struct nouveau_sgdma_be {
8e7e7052 JG	8	/* this has to be the first field so populate/unpopulated in
	9	* nouve_bo.c works properly, otherwise have to move them here
	10	*/
	11	struct ttm_dma_tt ttm;
be83cd4e	12	struct nvkm_mem *node;
6ee73861 BS	13	};
6ee73861 BS	14
efa58db3	15	static void
649bf3ca	16	nouveau_sgdma_destroy(struct ttm_tt *ttm)
efa58db3	17	{
649bf3ca	18	struct nouveau_sgdma_be nvbe = (struct nouveau_sgdma_be )ttm;
efa58db3	19
649bf3ca	20	if (ttm) {
8e7e7052	21	ttm_dma_tt_fini(&nvbe->ttm);
649bf3ca	22	kfree(nvbe);
efa58db3 BS	23	}
	24	}
	25
6ee73861	26	static int
649bf3ca	27	nv04_sgdma_bind(struct ttm_tt ttm, struct ttm_mem_reg mem)
6ee73861	28	{
649bf3ca	29	struct nouveau_sgdma_be nvbe = (struct nouveau_sgdma_be )ttm;
be83cd4e	30	struct nvkm_mem *node = mem->mm_node;
6ee73861	31
3863c9bc	32	if (ttm->sg) {
2e2cfbe6 BS	33	node->sg = ttm->sg;
2e2cfbe6 BS	34	node->pages = NULL;
3863c9bc	35	} else {
2e2cfbe6	36	node->sg = NULL;
3863c9bc	37	node->pages = nvbe->ttm.dma_address;
6ee73861	38	}
2e2cfbe6	39	node->size = (mem->num_pages << PAGE_SHIFT) >> 12;
6ee73861	40
be83cd4e	41	nvkm_vm_map(&node->vma[0], node);
3863c9bc	42	nvbe->node = node;
6ee73861 BS	43	return 0;
	44	}
	45
	46	static int
649bf3ca	47	nv04_sgdma_unbind(struct ttm_tt *ttm)
6ee73861	48	{
649bf3ca	49	struct nouveau_sgdma_be nvbe = (struct nouveau_sgdma_be )ttm;
be83cd4e	50	nvkm_vm_unmap(&nvbe->node->vma[0]);
6ee73861 BS	51	return 0;
	52	}
	53
efa58db3	54	static struct ttm_backend_func nv04_sgdma_backend = {
efa58db3 BS	55	.bind = nv04_sgdma_bind,
	56	.unbind = nv04_sgdma_unbind,
	57	.destroy = nouveau_sgdma_destroy
	58	};
6ee73861	59
b571fe21	60	static int
649bf3ca	61	nv50_sgdma_bind(struct ttm_tt ttm, struct ttm_mem_reg mem)
b571fe21	62	{
8e7e7052	63	struct nouveau_sgdma_be nvbe = (struct nouveau_sgdma_be )ttm;
be83cd4e	64	struct nvkm_mem *node = mem->mm_node;
649bf3ca	65
26c0c9e3	66	/* noop: bound in move_notify() */
22b33e8e	67	if (ttm->sg) {
2e2cfbe6 BS	68	node->sg = ttm->sg;
	69	node->pages = NULL;
	70	} else {
	71	node->sg = NULL;
22b33e8e	72	node->pages = nvbe->ttm.dma_address;
2e2cfbe6 BS	73	}
2e2cfbe6 BS	74	node->size = (mem->num_pages << PAGE_SHIFT) >> 12;
b571fe21 BS	75	return 0;
	76	}
	77
	78	static int
649bf3ca	79	nv50_sgdma_unbind(struct ttm_tt *ttm)
b571fe21	80	{
26c0c9e3	81	/* noop: unbound in move_notify() */
b571fe21 BS	82	return 0;
	83	}
	84
b571fe21	85	static struct ttm_backend_func nv50_sgdma_backend = {
b571fe21 BS	86	.bind = nv50_sgdma_bind,
	87	.unbind = nv50_sgdma_unbind,
	88	.destroy = nouveau_sgdma_destroy
	89	};
	90
649bf3ca JG	91	struct ttm_tt *
	92	nouveau_sgdma_create_ttm(struct ttm_bo_device *bdev,
	93	unsigned long size, uint32_t page_flags,
	94	struct page *dummy_read_page)
6ee73861	95	{
ebb945a9	96	struct nouveau_drm *drm = nouveau_bdev(bdev);
6ee73861 BS	97	struct nouveau_sgdma_be *nvbe;
6ee73861 BS	98
6ee73861 BS	99	nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL);
	100	if (!nvbe)
	101	return NULL;
	102
967e7bde	103	if (drm->device.info.family < NV_DEVICE_INFO_V0_TESLA)
ebb945a9 BS	104	nvbe->ttm.ttm.func = &nv04_sgdma_backend;
	105	else
	106	nvbe->ttm.ttm.func = &nv50_sgdma_backend;
6ee73861	107
7a59cc34	108	if (ttm_dma_tt_init(&nvbe->ttm, bdev, size, page_flags, dummy_read_page))
495b2176 AC	109	/*
	110	* A failing ttm_dma_tt_init() will call ttm_tt_destroy()
	111	* and thus our nouveau_sgdma_destroy() hook, so we don't need
	112	* to free nvbe here.
	113	*/
649bf3ca	114	return NULL;
8e7e7052	115	return &nvbe->ttm.ttm;
6ee73861	116	}