summaryrefslogtreecommitdiffstats
path: root/drivers/misc/mic/scif/scif_map.h
blob: 3e86360ba5a6b07287abea9b05092442d7b1162a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
/*
 * Intel MIC Platform Software Stack (MPSS)
 *
 * Copyright(c) 2014 Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2, as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * Intel SCIF driver.
 *
 */
#ifndef SCIF_MAP_H
#define SCIF_MAP_H

#include "../bus/scif_bus.h"

static __always_inline void *
scif_alloc_coherent(dma_addr_t *dma_handle,
		    struct scif_dev *scifdev, size_t size,
		    gfp_t gfp)
{
	void *va;

	if (scifdev_self(scifdev)) {
		va = kmalloc(size, gfp);
		if (va)
			*dma_handle = virt_to_phys(va);
	} else {
		va = dma_alloc_coherent(&scifdev->sdev->dev,
					size, dma_handle, gfp);
		if (va && scifdev_is_p2p(scifdev))
			*dma_handle = *dma_handle + scifdev->base_addr;
	}
	return va;
}

static __always_inline void
scif_free_coherent(void *va, dma_addr_t local,
		   struct scif_dev *scifdev, size_t size)
{
	if (scifdev_self(scifdev)) {
		kfree(va);
	} else {
		if (scifdev_is_p2p(scifdev) && local > scifdev->base_addr)
			local = local - scifdev->base_addr;
		dma_free_coherent(&scifdev->sdev->dev,
				  size, va, local);
	}
}

static __always_inline int
scif_map_single(dma_addr_t *dma_handle,
		void *local, struct scif_dev *scifdev, size_t size)
{
	int err = 0;

	if (scifdev_self(scifdev)) {
		*dma_handle = virt_to_phys((local));
	} else {
		*dma_handle = dma_map_single(&scifdev->sdev->dev,
					     local, size, DMA_BIDIRECTIONAL);
		if (dma_mapping_error(&scifdev->sdev->dev, *dma_handle))
			err = -ENOMEM;
		else if (scifdev_is_p2p(scifdev))
			*dma_handle = *dma_handle + scifdev->base_addr;
	}
	if (err)
		*dma_handle = 0;
	return err;
}

static __always_inline void
scif_unmap_single(dma_addr_t local, struct scif_dev *scifdev,
		  size_t size)
{
	if (!scifdev_self(scifdev)) {
		if (scifdev_is_p2p(scifdev))
			local = local - scifdev->base_addr;
		dma_unmap_single(&scifdev->sdev->dev, local,
				 size, DMA_BIDIRECTIONAL);
	}
}

static __always_inline void *
scif_ioremap(dma_addr_t phys, size_t size, struct scif_dev *scifdev)
{
	void *out_virt;
	struct scif_hw_dev *sdev = scifdev->sdev;

	if (scifdev_self(scifdev))
		out_virt = phys_to_virt(phys);
	else
		out_virt = (void __force *)
			   sdev->hw_ops->ioremap(sdev, phys, size);
	return out_virt;
}

static __always_inline void
scif_iounmap(void *virt, size_t len, struct scif_dev *scifdev)
{
	if (!scifdev_self(scifdev)) {
		struct scif_hw_dev *sdev = scifdev->sdev;

		sdev->hw_ops->iounmap(sdev, (void __force __iomem *)virt);
	}
}

static __always_inline int
scif_map_page(dma_addr_t *dma_handle, struct page *page,
	      struct scif_dev *scifdev)
{
	int err = 0;

	if (scifdev_self(scifdev)) {
		*dma_handle = page_to_phys(page);
	} else {
		struct scif_hw_dev *sdev = scifdev->sdev;
		*dma_handle = dma_map_page(&sdev->dev,
					   page, 0x0, PAGE_SIZE,
					   DMA_BIDIRECTIONAL);
		if (dma_mapping_error(&sdev->dev, *dma_handle))
			err = -ENOMEM;
		else if (scifdev_is_p2p(scifdev))
			*dma_handle = *dma_handle + scifdev->base_addr;
	}
	if (err)
		*dma_handle = 0;
	return err;
}
#endif  /* SCIF_MAP_H */
OpenPOWER on IntegriCloud