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f30664e2 SO |
1 | #ifndef SCM_BLK_H |
2 | #define SCM_BLK_H | |
3 | ||
4 | #include <linux/interrupt.h> | |
5 | #include <linux/spinlock.h> | |
6 | #include <linux/blkdev.h> | |
7 | #include <linux/genhd.h> | |
8 | #include <linux/list.h> | |
9 | ||
10 | #include <asm/debug.h> | |
11 | #include <asm/eadm.h> | |
12 | ||
13 | #define SCM_NR_PARTS 8 | |
14 | #define SCM_QUEUE_DELAY 5 | |
15 | ||
16 | struct scm_blk_dev { | |
17 | struct tasklet_struct tasklet; | |
18 | struct request_queue *rq; | |
19 | struct gendisk *gendisk; | |
20 | struct scm_device *scmdev; | |
21 | spinlock_t rq_lock; /* guard the request queue */ | |
22 | spinlock_t lock; /* guard the rest of the blockdev */ | |
23 | atomic_t queued_reqs; | |
4fa3c019 | 24 | enum {SCM_OPER, SCM_WR_PROHIBIT} state; |
f30664e2 | 25 | struct list_head finished_requests; |
0d804b20 SO |
26 | #ifdef CONFIG_SCM_BLOCK_CLUSTER_WRITE |
27 | struct list_head cluster_list; | |
28 | #endif | |
f30664e2 SO |
29 | }; |
30 | ||
31 | struct scm_request { | |
32 | struct scm_blk_dev *bdev; | |
33 | struct request *request; | |
34 | struct aidaw *aidaw; | |
35 | struct aob *aob; | |
36 | struct list_head list; | |
37 | u8 retries; | |
38 | int error; | |
0d804b20 SO |
39 | #ifdef CONFIG_SCM_BLOCK_CLUSTER_WRITE |
40 | struct { | |
41 | enum {CLUSTER_NONE, CLUSTER_READ, CLUSTER_WRITE} state; | |
42 | struct list_head list; | |
43 | void **buf; | |
44 | } cluster; | |
45 | #endif | |
f30664e2 SO |
46 | }; |
47 | ||
48 | #define to_aobrq(rq) container_of((void *) rq, struct aob_rq_header, data) | |
49 | ||
50 | int scm_blk_dev_setup(struct scm_blk_dev *, struct scm_device *); | |
51 | void scm_blk_dev_cleanup(struct scm_blk_dev *); | |
4fa3c019 | 52 | void scm_blk_set_available(struct scm_blk_dev *); |
f30664e2 SO |
53 | void scm_blk_irq(struct scm_device *, void *, int); |
54 | ||
0d804b20 SO |
55 | void scm_request_finish(struct scm_request *); |
56 | void scm_request_requeue(struct scm_request *); | |
57 | ||
f30664e2 SO |
58 | int scm_drv_init(void); |
59 | void scm_drv_cleanup(void); | |
60 | ||
0d804b20 SO |
61 | #ifdef CONFIG_SCM_BLOCK_CLUSTER_WRITE |
62 | void __scm_free_rq_cluster(struct scm_request *); | |
63 | int __scm_alloc_rq_cluster(struct scm_request *); | |
64 | void scm_request_cluster_init(struct scm_request *); | |
65 | bool scm_reserve_cluster(struct scm_request *); | |
66 | void scm_release_cluster(struct scm_request *); | |
67 | void scm_blk_dev_cluster_setup(struct scm_blk_dev *); | |
68 | bool scm_need_cluster_request(struct scm_request *); | |
69 | void scm_initiate_cluster_request(struct scm_request *); | |
70 | void scm_cluster_request_irq(struct scm_request *); | |
71 | bool scm_test_cluster_request(struct scm_request *); | |
72 | bool scm_cluster_size_valid(void); | |
58fece78 SO |
73 | #else /* CONFIG_SCM_BLOCK_CLUSTER_WRITE */ |
74 | static inline void __scm_free_rq_cluster(struct scm_request *scmrq) {} | |
75 | static inline int __scm_alloc_rq_cluster(struct scm_request *scmrq) | |
76 | { | |
77 | return 0; | |
78 | } | |
79 | static inline void scm_request_cluster_init(struct scm_request *scmrq) {} | |
80 | static inline bool scm_reserve_cluster(struct scm_request *scmrq) | |
81 | { | |
82 | return true; | |
83 | } | |
84 | static inline void scm_release_cluster(struct scm_request *scmrq) {} | |
85 | static inline void scm_blk_dev_cluster_setup(struct scm_blk_dev *bdev) {} | |
86 | static inline bool scm_need_cluster_request(struct scm_request *scmrq) | |
87 | { | |
88 | return false; | |
89 | } | |
90 | static inline void scm_initiate_cluster_request(struct scm_request *scmrq) {} | |
91 | static inline void scm_cluster_request_irq(struct scm_request *scmrq) {} | |
92 | static inline bool scm_test_cluster_request(struct scm_request *scmrq) | |
93 | { | |
94 | return false; | |
95 | } | |
96 | static inline bool scm_cluster_size_valid(void) | |
97 | { | |
98 | return true; | |
99 | } | |
100 | #endif /* CONFIG_SCM_BLOCK_CLUSTER_WRITE */ | |
f30664e2 SO |
101 | |
102 | extern debug_info_t *scm_debug; | |
103 | ||
104 | #define SCM_LOG(imp, txt) do { \ | |
105 | debug_text_event(scm_debug, imp, txt); \ | |
106 | } while (0) | |
107 | ||
108 | static inline void SCM_LOG_HEX(int level, void *data, int length) | |
109 | { | |
110 | if (level > scm_debug->level) | |
111 | return; | |
112 | while (length > 0) { | |
113 | debug_event(scm_debug, level, data, length); | |
114 | length -= scm_debug->buf_size; | |
115 | data += scm_debug->buf_size; | |
116 | } | |
117 | } | |
118 | ||
119 | static inline void SCM_LOG_STATE(int level, struct scm_device *scmdev) | |
120 | { | |
121 | struct { | |
122 | u64 address; | |
123 | u8 oper_state; | |
124 | u8 rank; | |
125 | } __packed data = { | |
126 | .address = scmdev->address, | |
127 | .oper_state = scmdev->attrs.oper_state, | |
128 | .rank = scmdev->attrs.rank, | |
129 | }; | |
130 | ||
131 | SCM_LOG_HEX(level, &data, sizeof(data)); | |
132 | } | |
133 | ||
134 | #endif /* SCM_BLK_H */ |