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6#ifndef _ASM_POWERPC_VAS_H
7#define _ASM_POWERPC_VAS_H
8#include <linux/sched/mm.h>
9#include <linux/mmu_context.h>
10#include <asm/icswx.h>
11#include <uapi/asm/vas-api.h>
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16
17#define VAS_RX_FIFO_SIZE_MIN (1 << 10)
18#define VAS_RX_FIFO_SIZE_MAX (8 << 20)
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26
27#define VAS_THRESH_DISABLED 0
28#define VAS_THRESH_FIFO_GT_HALF_FULL 1
29#define VAS_THRESH_FIFO_GT_QTR_FULL 2
30#define VAS_THRESH_FIFO_GT_EIGHTH_FULL 3
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35#define GET_FIELD(m, v) (((v) & (m)) >> MASK_LSH(m))
36#define MASK_LSH(m) (__builtin_ffsl(m) - 1)
37#define SET_FIELD(m, v, val) \
38 (((v) & ~(m)) | ((((typeof(v))(val)) << MASK_LSH(m)) & (m)))
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42
43enum vas_cop_type {
44 VAS_COP_TYPE_FAULT,
45 VAS_COP_TYPE_842,
46 VAS_COP_TYPE_842_HIPRI,
47 VAS_COP_TYPE_GZIP,
48 VAS_COP_TYPE_GZIP_HIPRI,
49 VAS_COP_TYPE_FTW,
50 VAS_COP_TYPE_MAX,
51};
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57
58struct vas_user_win_ref {
59 struct pid *pid;
60 struct pid *tgid;
61 struct mm_struct *mm;
62};
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66
67struct vas_window {
68 u32 winid;
69 u32 wcreds_max;
70 enum vas_cop_type cop;
71 struct vas_user_win_ref task_ref;
72 char *dbgname;
73 struct dentry *dbgdir;
74};
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78
79struct vas_user_win_ops {
80 struct vas_window * (*open_win)(int vas_id, u64 flags,
81 enum vas_cop_type);
82 u64 (*paste_addr)(struct vas_window *);
83 int (*close_win)(struct vas_window *);
84};
85
86static inline void put_vas_user_win_ref(struct vas_user_win_ref *ref)
87{
88
89 put_pid(ref->pid);
90 put_pid(ref->tgid);
91 if (ref->mm)
92 mmdrop(ref->mm);
93}
94
95static inline void vas_user_win_add_mm_context(struct vas_user_win_ref *ref)
96{
97 mm_context_add_vas_window(ref->mm);
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108 asm volatile(PPC_CP_ABORT);
109}
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114struct vas_rx_win_attr {
115 void *rx_fifo;
116 int rx_fifo_size;
117 int wcreds_max;
118
119 bool pin_win;
120 bool rej_no_credit;
121 bool tx_wcred_mode;
122 bool rx_wcred_mode;
123 bool tx_win_ord_mode;
124 bool rx_win_ord_mode;
125 bool data_stamp;
126 bool nx_win;
127 bool fault_win;
128 bool user_win;
129 bool notify_disable;
130 bool intr_disable;
131 bool notify_early;
132
133 int lnotify_lpid;
134 int lnotify_pid;
135 int lnotify_tid;
136 u32 pswid;
137
138 int tc_mode;
139};
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143
144struct vas_tx_win_attr {
145 enum vas_cop_type cop;
146 int wcreds_max;
147 int lpid;
148 int pidr;
149 int pswid;
150 int rsvd_txbuf_count;
151 int tc_mode;
152
153 bool user_win;
154 bool pin_win;
155 bool rej_no_credit;
156 bool rsvd_txbuf_enable;
157 bool tx_wcred_mode;
158 bool rx_wcred_mode;
159 bool tx_win_ord_mode;
160 bool rx_win_ord_mode;
161};
162
163#ifdef CONFIG_PPC_POWERNV
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171int chip_to_vas_id(int chipid);
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177void vas_init_rx_win_attr(struct vas_rx_win_attr *rxattr, enum vas_cop_type cop);
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185struct vas_window *vas_rx_win_open(int vasid, enum vas_cop_type cop,
186 struct vas_rx_win_attr *attr);
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191extern void vas_init_tx_win_attr(struct vas_tx_win_attr *txattr,
192 enum vas_cop_type cop);
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204struct vas_window *vas_tx_win_open(int vasid, enum vas_cop_type cop,
205 struct vas_tx_win_attr *attr);
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212int vas_win_close(struct vas_window *win);
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217int vas_copy_crb(void *crb, int offset);
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224int vas_paste_crb(struct vas_window *win, int offset, bool re);
225
226int vas_register_api_powernv(struct module *mod, enum vas_cop_type cop_type,
227 const char *name);
228void vas_unregister_api_powernv(void);
229#endif
230
231#ifdef CONFIG_PPC_PSERIES
232
233
234#define VAS_GZIP_QOS_FEAT 0x1
235#define VAS_GZIP_DEF_FEAT 0x2
236#define VAS_GZIP_QOS_FEAT_BIT PPC_BIT(VAS_GZIP_QOS_FEAT)
237#define VAS_GZIP_DEF_FEAT_BIT PPC_BIT(VAS_GZIP_DEF_FEAT)
238
239
240#define VAS_NX_GZIP_FEAT 0x1
241#define VAS_NX_GZIP_FEAT_BIT PPC_BIT(VAS_NX_GZIP_FEAT)
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246
247struct hv_vas_all_caps {
248 __be64 descriptor;
249 __be64 feat_type;
250} __packed __aligned(0x1000);
251
252struct vas_all_caps {
253 u64 descriptor;
254 u64 feat_type;
255};
256
257int h_query_vas_capabilities(const u64 hcall, u8 query_type, u64 result);
258int vas_register_api_pseries(struct module *mod,
259 enum vas_cop_type cop_type, const char *name);
260void vas_unregister_api_pseries(void);
261#endif
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271int vas_register_coproc_api(struct module *mod, enum vas_cop_type cop_type,
272 const char *name,
273 const struct vas_user_win_ops *vops);
274void vas_unregister_coproc_api(void);
275
276int get_vas_user_win_ref(struct vas_user_win_ref *task_ref);
277void vas_update_csb(struct coprocessor_request_block *crb,
278 struct vas_user_win_ref *task_ref);
279void vas_dump_crb(struct coprocessor_request_block *crb);
280#endif
281