1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 *
4 * Copyright (C) 2013 Freescale Semiconductor, Inc.
5 */
6
7 #ifndef __FSL_PAMU_DOMAIN_H
8 #define __FSL_PAMU_DOMAIN_H
9
10 #include "fsl_pamu.h"
11
12 struct dma_window {
13 phys_addr_t paddr;
14 u64 size;
15 int valid;
16 int prot;
17 };
18
19 struct fsl_dma_domain {
20 /*
21 * Indicates the geometry size for the domain.
22 * This would be set when the geometry is
23 * configured for the domain.
24 */
25 dma_addr_t geom_size;
26 /*
27 * Number of windows assocaited with this domain.
28 * During domain initialization, it is set to the
29 * the maximum number of subwindows allowed for a LIODN.
30 * Minimum value for this is 1 indicating a single PAMU
31 * window, without any sub windows. Value can be set/
32 * queried by set_attr/get_attr API for DOMAIN_ATTR_WINDOWS.
33 * Value can only be set once the geometry has been configured.
34 */
35 u32 win_cnt;
36 /*
37 * win_arr contains information of the configured
38 * windows for a domain. This is allocated only
39 * when the number of windows for the domain are
40 * set.
41 */
42 struct dma_window *win_arr;
43 /* list of devices associated with the domain */
44 struct list_head devices;
45 /* dma_domain states:
46 * mapped - A particular mapping has been created
47 * within the configured geometry.
48 * enabled - DMA has been enabled for the given
49 * domain. This translates to setting of the
50 * valid bit for the primary PAACE in the PAMU
51 * PAACT table. Domain geometry should be set and
52 * it must have a valid mapping before DMA can be
53 * enabled for it.
54 *
55 */
56 int mapped;
57 int enabled;
58 /* stash_id obtained from the stash attribute details */
59 u32 stash_id;
60 struct pamu_stash_attribute dma_stash;
61 u32 snoop_id;
62 struct iommu_domain iommu_domain;
63 spinlock_t domain_lock;
64 };
65
66 /* domain-device relationship */
67 struct device_domain_info {
68 struct list_head link; /* link to domain siblings */
69 struct device *dev;
70 u32 liodn;
71 struct fsl_dma_domain *domain; /* pointer to domain */
72 };
73 #endif /* __FSL_PAMU_DOMAIN_H */