1/*
2 * Intel MIC Platform Software Stack (MPSS)
3 *
4 * Copyright(c) 2014 Intel Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License, version 2, as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * Intel SCIF driver.
16 *
17 */
18#ifndef SCIF_MAP_H
19#define SCIF_MAP_H
20
21#include "../bus/scif_bus.h"
22
23static __always_inline void *
24scif_alloc_coherent(dma_addr_t *dma_handle,
25		    struct scif_dev *scifdev, size_t size,
26		    gfp_t gfp)
27{
28	void *va;
29
30	if (scifdev_self(scifdev)) {
31		va = kmalloc(size, gfp);
32		if (va)
33			*dma_handle = virt_to_phys(va);
34	} else {
35		va = dma_alloc_coherent(&scifdev->sdev->dev,
36					size, dma_handle, gfp);
37		if (va && scifdev_is_p2p(scifdev))
38			*dma_handle = *dma_handle + scifdev->base_addr;
39	}
40	return va;
41}
42
43static __always_inline void
44scif_free_coherent(void *va, dma_addr_t local,
45		   struct scif_dev *scifdev, size_t size)
46{
47	if (scifdev_self(scifdev)) {
48		kfree(va);
49	} else {
50		if (scifdev_is_p2p(scifdev) && local > scifdev->base_addr)
51			local = local - scifdev->base_addr;
52		dma_free_coherent(&scifdev->sdev->dev,
53				  size, va, local);
54	}
55}
56
57static __always_inline int
58scif_map_single(dma_addr_t *dma_handle,
59		void *local, struct scif_dev *scifdev, size_t size)
60{
61	int err = 0;
62
63	if (scifdev_self(scifdev)) {
64		*dma_handle = virt_to_phys((local));
65	} else {
66		*dma_handle = dma_map_single(&scifdev->sdev->dev,
67					     local, size, DMA_BIDIRECTIONAL);
68		if (dma_mapping_error(&scifdev->sdev->dev, *dma_handle))
69			err = -ENOMEM;
70		else if (scifdev_is_p2p(scifdev))
71			*dma_handle = *dma_handle + scifdev->base_addr;
72	}
73	if (err)
74		*dma_handle = 0;
75	return err;
76}
77
78static __always_inline void
79scif_unmap_single(dma_addr_t local, struct scif_dev *scifdev,
80		  size_t size)
81{
82	if (!scifdev_self(scifdev)) {
83		if (scifdev_is_p2p(scifdev))
84			local = local - scifdev->base_addr;
85		dma_unmap_single(&scifdev->sdev->dev, local,
86				 size, DMA_BIDIRECTIONAL);
87	}
88}
89
90static __always_inline void *
91scif_ioremap(dma_addr_t phys, size_t size, struct scif_dev *scifdev)
92{
93	void *out_virt;
94	struct scif_hw_dev *sdev = scifdev->sdev;
95
96	if (scifdev_self(scifdev))
97		out_virt = phys_to_virt(phys);
98	else
99		out_virt = (void __force *)
100			   sdev->hw_ops->ioremap(sdev, phys, size);
101	return out_virt;
102}
103
104static __always_inline void
105scif_iounmap(void *virt, size_t len, struct scif_dev *scifdev)
106{
107	if (!scifdev_self(scifdev)) {
108		struct scif_hw_dev *sdev = scifdev->sdev;
109
110		sdev->hw_ops->iounmap(sdev, (void __force __iomem *)virt);
111	}
112}
113
114static __always_inline int
115scif_map_page(dma_addr_t *dma_handle, struct page *page,
116	      struct scif_dev *scifdev)
117{
118	int err = 0;
119
120	if (scifdev_self(scifdev)) {
121		*dma_handle = page_to_phys(page);
122	} else {
123		struct scif_hw_dev *sdev = scifdev->sdev;
124		*dma_handle = dma_map_page(&sdev->dev,
125					   page, 0x0, PAGE_SIZE,
126					   DMA_BIDIRECTIONAL);
127		if (dma_mapping_error(&sdev->dev, *dma_handle))
128			err = -ENOMEM;
129		else if (scifdev_is_p2p(scifdev))
130			*dma_handle = *dma_handle + scifdev->base_addr;
131	}
132	if (err)
133		*dma_handle = 0;
134	return err;
135}
136#endif  /* SCIF_MAP_H */
137