1 /*
2 * Copyright (C) 2013 Red Hat
3 * Author: Rob Clark <robdclark@gmail.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18 #ifndef __MSM_MMU_H__
19 #define __MSM_MMU_H__
20
21 #include <linux/iommu.h>
22
23 struct msm_mmu_funcs {
24 int (*attach)(struct msm_mmu *mmu, const char * const *names, int cnt);
25 void (*detach)(struct msm_mmu *mmu, const char * const *names, int cnt);
26 int (*map)(struct msm_mmu *mmu, uint64_t iova, struct sg_table *sgt,
27 unsigned len, int prot);
28 int (*unmap)(struct msm_mmu *mmu, uint64_t iova, struct sg_table *sgt,
29 unsigned len);
30 void (*destroy)(struct msm_mmu *mmu);
31 };
32
33 struct msm_mmu {
34 const struct msm_mmu_funcs *funcs;
35 struct device *dev;
36 int (*handler)(void *arg, unsigned long iova, int flags);
37 void *arg;
38 };
39
msm_mmu_init(struct msm_mmu * mmu,struct device * dev,const struct msm_mmu_funcs * funcs)40 static inline void msm_mmu_init(struct msm_mmu *mmu, struct device *dev,
41 const struct msm_mmu_funcs *funcs)
42 {
43 mmu->dev = dev;
44 mmu->funcs = funcs;
45 }
46
47 struct msm_mmu *msm_iommu_new(struct device *dev, struct iommu_domain *domain);
48 struct msm_mmu *msm_gpummu_new(struct device *dev, struct msm_gpu *gpu);
49
msm_mmu_set_fault_handler(struct msm_mmu * mmu,void * arg,int (* handler)(void * arg,unsigned long iova,int flags))50 static inline void msm_mmu_set_fault_handler(struct msm_mmu *mmu, void *arg,
51 int (*handler)(void *arg, unsigned long iova, int flags))
52 {
53 mmu->arg = arg;
54 mmu->handler = handler;
55 }
56
57 #endif /* __MSM_MMU_H__ */
58
