[mirror_ubuntu-focal-kernel.git] / drivers / gpu / drm / nouveau / nouveau_sgdma.c

// SPDX-License-Identifier: GPL-2.0
#include <linux/pagemap.h>
#include <linux/slab.h>

#include "nouveau_drv.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 *reg)
{
	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
	struct nvkm_mem *node = reg->mm_node;

	if (ttm->sg) {
		node->sg    = ttm->sg;
		node->pages = NULL;
	} else {
		node->sg    = NULL;
		node->pages = nvbe->ttm.dma_address;
	}
	node->size = (reg->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 *reg)
{
	struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
	struct nvkm_mem *node = reg->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 = (reg->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->client.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
b2441318	1	// SPDX-License-Identifier: GPL-2.0
6ee73861	2	#include <linux/pagemap.h>
5a0e3ad6	3	#include <linux/slab.h>
6ee73861	4
4dc28134	5	#include "nouveau_drv.h"
ebb945a9	6	#include "nouveau_ttm.h"
6ee73861 BS	7
6ee73861 BS	8	struct nouveau_sgdma_be {
8e7e7052 JG	9	/* this has to be the first field so populate/unpopulated in
	10	* nouve_bo.c works properly, otherwise have to move them here
	11	*/
	12	struct ttm_dma_tt ttm;
be83cd4e	13	struct nvkm_mem *node;
6ee73861 BS	14	};
6ee73861 BS	15
efa58db3	16	static void
649bf3ca	17	nouveau_sgdma_destroy(struct ttm_tt *ttm)
efa58db3	18	{
649bf3ca	19	struct nouveau_sgdma_be nvbe = (struct nouveau_sgdma_be )ttm;
efa58db3	20
649bf3ca	21	if (ttm) {
8e7e7052	22	ttm_dma_tt_fini(&nvbe->ttm);
649bf3ca	23	kfree(nvbe);
efa58db3 BS	24	}
	25	}
	26
6ee73861	27	static int
605f9ccd	28	nv04_sgdma_bind(struct ttm_tt ttm, struct ttm_mem_reg reg)
6ee73861	29	{
649bf3ca	30	struct nouveau_sgdma_be nvbe = (struct nouveau_sgdma_be )ttm;
605f9ccd	31	struct nvkm_mem *node = reg->mm_node;
6ee73861	32
3863c9bc	33	if (ttm->sg) {
2e2cfbe6 BS	34	node->sg = ttm->sg;
2e2cfbe6 BS	35	node->pages = NULL;
3863c9bc	36	} else {
2e2cfbe6	37	node->sg = NULL;
3863c9bc	38	node->pages = nvbe->ttm.dma_address;
6ee73861	39	}
605f9ccd	40	node->size = (reg->num_pages << PAGE_SHIFT) >> 12;
6ee73861	41
be83cd4e	42	nvkm_vm_map(&node->vma[0], node);
3863c9bc	43	nvbe->node = node;
6ee73861 BS	44	return 0;
	45	}
	46
	47	static int
649bf3ca	48	nv04_sgdma_unbind(struct ttm_tt *ttm)
6ee73861	49	{
649bf3ca	50	struct nouveau_sgdma_be nvbe = (struct nouveau_sgdma_be )ttm;
be83cd4e	51	nvkm_vm_unmap(&nvbe->node->vma[0]);
6ee73861 BS	52	return 0;
	53	}
	54
efa58db3	55	static struct ttm_backend_func nv04_sgdma_backend = {
efa58db3 BS	56	.bind = nv04_sgdma_bind,
	57	.unbind = nv04_sgdma_unbind,
	58	.destroy = nouveau_sgdma_destroy
	59	};
6ee73861	60
b571fe21	61	static int
605f9ccd	62	nv50_sgdma_bind(struct ttm_tt ttm, struct ttm_mem_reg reg)
b571fe21	63	{
8e7e7052	64	struct nouveau_sgdma_be nvbe = (struct nouveau_sgdma_be )ttm;
605f9ccd	65	struct nvkm_mem *node = reg->mm_node;
649bf3ca	66
26c0c9e3	67	/* noop: bound in move_notify() */
22b33e8e	68	if (ttm->sg) {
2e2cfbe6 BS	69	node->sg = ttm->sg;
	70	node->pages = NULL;
	71	} else {
	72	node->sg = NULL;
22b33e8e	73	node->pages = nvbe->ttm.dma_address;
2e2cfbe6	74	}
605f9ccd	75	node->size = (reg->num_pages << PAGE_SHIFT) >> 12;
b571fe21 BS	76	return 0;
	77	}
	78
	79	static int
649bf3ca	80	nv50_sgdma_unbind(struct ttm_tt *ttm)
b571fe21	81	{
26c0c9e3	82	/* noop: unbound in move_notify() */
b571fe21 BS	83	return 0;
	84	}
	85
b571fe21	86	static struct ttm_backend_func nv50_sgdma_backend = {
b571fe21 BS	87	.bind = nv50_sgdma_bind,
	88	.unbind = nv50_sgdma_unbind,
	89	.destroy = nouveau_sgdma_destroy
	90	};
	91
649bf3ca JG	92	struct ttm_tt *
	93	nouveau_sgdma_create_ttm(struct ttm_bo_device *bdev,
	94	unsigned long size, uint32_t page_flags,
	95	struct page *dummy_read_page)
6ee73861	96	{
ebb945a9	97	struct nouveau_drm *drm = nouveau_bdev(bdev);
6ee73861 BS	98	struct nouveau_sgdma_be *nvbe;
6ee73861 BS	99
6ee73861 BS	100	nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL);
	101	if (!nvbe)
	102	return NULL;
	103
1167c6bc	104	if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA)
ebb945a9 BS	105	nvbe->ttm.ttm.func = &nv04_sgdma_backend;
	106	else
	107	nvbe->ttm.ttm.func = &nv50_sgdma_backend;
6ee73861	108
7a59cc34	109	if (ttm_dma_tt_init(&nvbe->ttm, bdev, size, page_flags, dummy_read_page))
495b2176 AC	110	/*
	111	* A failing ttm_dma_tt_init() will call ttm_tt_destroy()
	112	* and thus our nouveau_sgdma_destroy() hook, so we don't need
	113	* to free nvbe here.
	114	*/
649bf3ca	115	return NULL;
8e7e7052	116	return &nvbe->ttm.ttm;
6ee73861	117	}