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f204e0b8 IM |
1 | /* |
2 | * Copyright 2014 IBM Corp. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | */ | |
9 | ||
10 | #ifndef _CXL_H_ | |
11 | #define _CXL_H_ | |
12 | ||
13 | #include <linux/interrupt.h> | |
14 | #include <linux/semaphore.h> | |
15 | #include <linux/device.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/cdev.h> | |
18 | #include <linux/pid.h> | |
19 | #include <linux/io.h> | |
20 | #include <linux/pci.h> | |
21 | #include <asm/cputable.h> | |
22 | #include <asm/mmu.h> | |
23 | #include <asm/reg.h> | |
ec249dd8 | 24 | #include <misc/cxl-base.h> |
f204e0b8 IM |
25 | |
26 | #include <uapi/misc/cxl.h> | |
27 | ||
28 | extern uint cxl_verbose; | |
29 | ||
30 | #define CXL_TIMEOUT 5 | |
31 | ||
32 | /* | |
33 | * Bump version each time a user API change is made, whether it is | |
34 | * backwards compatible ot not. | |
35 | */ | |
36 | #define CXL_API_VERSION 1 | |
37 | #define CXL_API_VERSION_COMPATIBLE 1 | |
38 | ||
39 | /* | |
40 | * Opaque types to avoid accidentally passing registers for the wrong MMIO | |
41 | * | |
42 | * At the end of the day, I'm not married to using typedef here, but it might | |
43 | * (and has!) help avoid bugs like mixing up CXL_PSL_CtxTime and | |
44 | * CXL_PSL_CtxTime_An, or calling cxl_p1n_write instead of cxl_p1_write. | |
45 | * | |
46 | * I'm quite happy if these are changed back to #defines before upstreaming, it | |
47 | * should be little more than a regexp search+replace operation in this file. | |
48 | */ | |
49 | typedef struct { | |
50 | const int x; | |
51 | } cxl_p1_reg_t; | |
52 | typedef struct { | |
53 | const int x; | |
54 | } cxl_p1n_reg_t; | |
55 | typedef struct { | |
56 | const int x; | |
57 | } cxl_p2n_reg_t; | |
58 | #define cxl_reg_off(reg) \ | |
59 | (reg.x) | |
60 | ||
61 | /* Memory maps. Ref CXL Appendix A */ | |
62 | ||
63 | /* PSL Privilege 1 Memory Map */ | |
64 | /* Configuration and Control area */ | |
65 | static const cxl_p1_reg_t CXL_PSL_CtxTime = {0x0000}; | |
66 | static const cxl_p1_reg_t CXL_PSL_ErrIVTE = {0x0008}; | |
67 | static const cxl_p1_reg_t CXL_PSL_KEY1 = {0x0010}; | |
68 | static const cxl_p1_reg_t CXL_PSL_KEY2 = {0x0018}; | |
69 | static const cxl_p1_reg_t CXL_PSL_Control = {0x0020}; | |
70 | /* Downloading */ | |
71 | static const cxl_p1_reg_t CXL_PSL_DLCNTL = {0x0060}; | |
72 | static const cxl_p1_reg_t CXL_PSL_DLADDR = {0x0068}; | |
73 | ||
74 | /* PSL Lookaside Buffer Management Area */ | |
75 | static const cxl_p1_reg_t CXL_PSL_LBISEL = {0x0080}; | |
76 | static const cxl_p1_reg_t CXL_PSL_SLBIE = {0x0088}; | |
77 | static const cxl_p1_reg_t CXL_PSL_SLBIA = {0x0090}; | |
78 | static const cxl_p1_reg_t CXL_PSL_TLBIE = {0x00A0}; | |
79 | static const cxl_p1_reg_t CXL_PSL_TLBIA = {0x00A8}; | |
80 | static const cxl_p1_reg_t CXL_PSL_AFUSEL = {0x00B0}; | |
81 | ||
82 | /* 0x00C0:7EFF Implementation dependent area */ | |
83 | static const cxl_p1_reg_t CXL_PSL_FIR1 = {0x0100}; | |
84 | static const cxl_p1_reg_t CXL_PSL_FIR2 = {0x0108}; | |
85 | static const cxl_p1_reg_t CXL_PSL_VERSION = {0x0118}; | |
86 | static const cxl_p1_reg_t CXL_PSL_RESLCKTO = {0x0128}; | |
87 | static const cxl_p1_reg_t CXL_PSL_FIR_CNTL = {0x0148}; | |
88 | static const cxl_p1_reg_t CXL_PSL_DSNDCTL = {0x0150}; | |
89 | static const cxl_p1_reg_t CXL_PSL_SNWRALLOC = {0x0158}; | |
90 | static const cxl_p1_reg_t CXL_PSL_TRACE = {0x0170}; | |
91 | /* 0x7F00:7FFF Reserved PCIe MSI-X Pending Bit Array area */ | |
92 | /* 0x8000:FFFF Reserved PCIe MSI-X Table Area */ | |
93 | ||
94 | /* PSL Slice Privilege 1 Memory Map */ | |
95 | /* Configuration Area */ | |
96 | static const cxl_p1n_reg_t CXL_PSL_SR_An = {0x00}; | |
97 | static const cxl_p1n_reg_t CXL_PSL_LPID_An = {0x08}; | |
98 | static const cxl_p1n_reg_t CXL_PSL_AMBAR_An = {0x10}; | |
99 | static const cxl_p1n_reg_t CXL_PSL_SPOffset_An = {0x18}; | |
100 | static const cxl_p1n_reg_t CXL_PSL_ID_An = {0x20}; | |
101 | static const cxl_p1n_reg_t CXL_PSL_SERR_An = {0x28}; | |
102 | /* Memory Management and Lookaside Buffer Management */ | |
103 | static const cxl_p1n_reg_t CXL_PSL_SDR_An = {0x30}; | |
104 | static const cxl_p1n_reg_t CXL_PSL_AMOR_An = {0x38}; | |
105 | /* Pointer Area */ | |
106 | static const cxl_p1n_reg_t CXL_HAURP_An = {0x80}; | |
107 | static const cxl_p1n_reg_t CXL_PSL_SPAP_An = {0x88}; | |
108 | static const cxl_p1n_reg_t CXL_PSL_LLCMD_An = {0x90}; | |
109 | /* Control Area */ | |
110 | static const cxl_p1n_reg_t CXL_PSL_SCNTL_An = {0xA0}; | |
111 | static const cxl_p1n_reg_t CXL_PSL_CtxTime_An = {0xA8}; | |
112 | static const cxl_p1n_reg_t CXL_PSL_IVTE_Offset_An = {0xB0}; | |
113 | static const cxl_p1n_reg_t CXL_PSL_IVTE_Limit_An = {0xB8}; | |
114 | /* 0xC0:FF Implementation Dependent Area */ | |
115 | static const cxl_p1n_reg_t CXL_PSL_FIR_SLICE_An = {0xC0}; | |
116 | static const cxl_p1n_reg_t CXL_AFU_DEBUG_An = {0xC8}; | |
117 | static const cxl_p1n_reg_t CXL_PSL_APCALLOC_A = {0xD0}; | |
118 | static const cxl_p1n_reg_t CXL_PSL_COALLOC_A = {0xD8}; | |
119 | static const cxl_p1n_reg_t CXL_PSL_RXCTL_A = {0xE0}; | |
120 | static const cxl_p1n_reg_t CXL_PSL_SLICE_TRACE = {0xE8}; | |
121 | ||
122 | /* PSL Slice Privilege 2 Memory Map */ | |
123 | /* Configuration and Control Area */ | |
124 | static const cxl_p2n_reg_t CXL_PSL_PID_TID_An = {0x000}; | |
125 | static const cxl_p2n_reg_t CXL_CSRP_An = {0x008}; | |
126 | static const cxl_p2n_reg_t CXL_AURP0_An = {0x010}; | |
127 | static const cxl_p2n_reg_t CXL_AURP1_An = {0x018}; | |
128 | static const cxl_p2n_reg_t CXL_SSTP0_An = {0x020}; | |
129 | static const cxl_p2n_reg_t CXL_SSTP1_An = {0x028}; | |
130 | static const cxl_p2n_reg_t CXL_PSL_AMR_An = {0x030}; | |
131 | /* Segment Lookaside Buffer Management */ | |
132 | static const cxl_p2n_reg_t CXL_SLBIE_An = {0x040}; | |
133 | static const cxl_p2n_reg_t CXL_SLBIA_An = {0x048}; | |
134 | static const cxl_p2n_reg_t CXL_SLBI_Select_An = {0x050}; | |
135 | /* Interrupt Registers */ | |
136 | static const cxl_p2n_reg_t CXL_PSL_DSISR_An = {0x060}; | |
137 | static const cxl_p2n_reg_t CXL_PSL_DAR_An = {0x068}; | |
138 | static const cxl_p2n_reg_t CXL_PSL_DSR_An = {0x070}; | |
139 | static const cxl_p2n_reg_t CXL_PSL_TFC_An = {0x078}; | |
140 | static const cxl_p2n_reg_t CXL_PSL_PEHandle_An = {0x080}; | |
141 | static const cxl_p2n_reg_t CXL_PSL_ErrStat_An = {0x088}; | |
142 | /* AFU Registers */ | |
143 | static const cxl_p2n_reg_t CXL_AFU_Cntl_An = {0x090}; | |
144 | static const cxl_p2n_reg_t CXL_AFU_ERR_An = {0x098}; | |
145 | /* Work Element Descriptor */ | |
146 | static const cxl_p2n_reg_t CXL_PSL_WED_An = {0x0A0}; | |
147 | /* 0x0C0:FFF Implementation Dependent Area */ | |
148 | ||
149 | #define CXL_PSL_SPAP_Addr 0x0ffffffffffff000ULL | |
150 | #define CXL_PSL_SPAP_Size 0x0000000000000ff0ULL | |
151 | #define CXL_PSL_SPAP_Size_Shift 4 | |
152 | #define CXL_PSL_SPAP_V 0x0000000000000001ULL | |
153 | ||
154 | /****** CXL_PSL_DLCNTL *****************************************************/ | |
155 | #define CXL_PSL_DLCNTL_D (0x1ull << (63-28)) | |
156 | #define CXL_PSL_DLCNTL_C (0x1ull << (63-29)) | |
157 | #define CXL_PSL_DLCNTL_E (0x1ull << (63-30)) | |
158 | #define CXL_PSL_DLCNTL_S (0x1ull << (63-31)) | |
159 | #define CXL_PSL_DLCNTL_CE (CXL_PSL_DLCNTL_C | CXL_PSL_DLCNTL_E) | |
160 | #define CXL_PSL_DLCNTL_DCES (CXL_PSL_DLCNTL_D | CXL_PSL_DLCNTL_CE | CXL_PSL_DLCNTL_S) | |
161 | ||
162 | /****** CXL_PSL_SR_An ******************************************************/ | |
163 | #define CXL_PSL_SR_An_SF MSR_SF /* 64bit */ | |
164 | #define CXL_PSL_SR_An_TA (1ull << (63-1)) /* Tags active, GA1: 0 */ | |
165 | #define CXL_PSL_SR_An_HV MSR_HV /* Hypervisor, GA1: 0 */ | |
166 | #define CXL_PSL_SR_An_PR MSR_PR /* Problem state, GA1: 1 */ | |
167 | #define CXL_PSL_SR_An_ISL (1ull << (63-53)) /* Ignore Segment Large Page */ | |
168 | #define CXL_PSL_SR_An_TC (1ull << (63-54)) /* Page Table secondary hash */ | |
169 | #define CXL_PSL_SR_An_US (1ull << (63-56)) /* User state, GA1: X */ | |
170 | #define CXL_PSL_SR_An_SC (1ull << (63-58)) /* Segment Table secondary hash */ | |
171 | #define CXL_PSL_SR_An_R MSR_DR /* Relocate, GA1: 1 */ | |
172 | #define CXL_PSL_SR_An_MP (1ull << (63-62)) /* Master Process */ | |
173 | #define CXL_PSL_SR_An_LE (1ull << (63-63)) /* Little Endian */ | |
174 | ||
175 | /****** CXL_PSL_LLCMD_An ****************************************************/ | |
176 | #define CXL_LLCMD_TERMINATE 0x0001000000000000ULL | |
177 | #define CXL_LLCMD_REMOVE 0x0002000000000000ULL | |
178 | #define CXL_LLCMD_SUSPEND 0x0003000000000000ULL | |
179 | #define CXL_LLCMD_RESUME 0x0004000000000000ULL | |
180 | #define CXL_LLCMD_ADD 0x0005000000000000ULL | |
181 | #define CXL_LLCMD_UPDATE 0x0006000000000000ULL | |
182 | #define CXL_LLCMD_HANDLE_MASK 0x000000000000ffffULL | |
183 | ||
184 | /****** CXL_PSL_ID_An ****************************************************/ | |
185 | #define CXL_PSL_ID_An_F (1ull << (63-31)) | |
186 | #define CXL_PSL_ID_An_L (1ull << (63-30)) | |
187 | ||
188 | /****** CXL_PSL_SCNTL_An ****************************************************/ | |
189 | #define CXL_PSL_SCNTL_An_CR (0x1ull << (63-15)) | |
190 | /* Programming Modes: */ | |
191 | #define CXL_PSL_SCNTL_An_PM_MASK (0xffffull << (63-31)) | |
192 | #define CXL_PSL_SCNTL_An_PM_Shared (0x0000ull << (63-31)) | |
193 | #define CXL_PSL_SCNTL_An_PM_OS (0x0001ull << (63-31)) | |
194 | #define CXL_PSL_SCNTL_An_PM_Process (0x0002ull << (63-31)) | |
195 | #define CXL_PSL_SCNTL_An_PM_AFU (0x0004ull << (63-31)) | |
196 | #define CXL_PSL_SCNTL_An_PM_AFU_PBT (0x0104ull << (63-31)) | |
197 | /* Purge Status (ro) */ | |
198 | #define CXL_PSL_SCNTL_An_Ps_MASK (0x3ull << (63-39)) | |
199 | #define CXL_PSL_SCNTL_An_Ps_Pending (0x1ull << (63-39)) | |
200 | #define CXL_PSL_SCNTL_An_Ps_Complete (0x3ull << (63-39)) | |
201 | /* Purge */ | |
202 | #define CXL_PSL_SCNTL_An_Pc (0x1ull << (63-48)) | |
203 | /* Suspend Status (ro) */ | |
204 | #define CXL_PSL_SCNTL_An_Ss_MASK (0x3ull << (63-55)) | |
205 | #define CXL_PSL_SCNTL_An_Ss_Pending (0x1ull << (63-55)) | |
206 | #define CXL_PSL_SCNTL_An_Ss_Complete (0x3ull << (63-55)) | |
207 | /* Suspend Control */ | |
208 | #define CXL_PSL_SCNTL_An_Sc (0x1ull << (63-63)) | |
209 | ||
210 | /* AFU Slice Enable Status (ro) */ | |
211 | #define CXL_AFU_Cntl_An_ES_MASK (0x7ull << (63-2)) | |
212 | #define CXL_AFU_Cntl_An_ES_Disabled (0x0ull << (63-2)) | |
213 | #define CXL_AFU_Cntl_An_ES_Enabled (0x4ull << (63-2)) | |
214 | /* AFU Slice Enable */ | |
215 | #define CXL_AFU_Cntl_An_E (0x1ull << (63-3)) | |
216 | /* AFU Slice Reset status (ro) */ | |
217 | #define CXL_AFU_Cntl_An_RS_MASK (0x3ull << (63-5)) | |
218 | #define CXL_AFU_Cntl_An_RS_Pending (0x1ull << (63-5)) | |
219 | #define CXL_AFU_Cntl_An_RS_Complete (0x2ull << (63-5)) | |
220 | /* AFU Slice Reset */ | |
221 | #define CXL_AFU_Cntl_An_RA (0x1ull << (63-7)) | |
222 | ||
223 | /****** CXL_SSTP0/1_An ******************************************************/ | |
224 | /* These top bits are for the segment that CONTAINS the segment table */ | |
225 | #define CXL_SSTP0_An_B_SHIFT SLB_VSID_SSIZE_SHIFT | |
226 | #define CXL_SSTP0_An_KS (1ull << (63-2)) | |
227 | #define CXL_SSTP0_An_KP (1ull << (63-3)) | |
228 | #define CXL_SSTP0_An_N (1ull << (63-4)) | |
229 | #define CXL_SSTP0_An_L (1ull << (63-5)) | |
230 | #define CXL_SSTP0_An_C (1ull << (63-6)) | |
231 | #define CXL_SSTP0_An_TA (1ull << (63-7)) | |
232 | #define CXL_SSTP0_An_LP_SHIFT (63-9) /* 2 Bits */ | |
233 | /* And finally, the virtual address & size of the segment table: */ | |
234 | #define CXL_SSTP0_An_SegTableSize_SHIFT (63-31) /* 12 Bits */ | |
235 | #define CXL_SSTP0_An_SegTableSize_MASK \ | |
236 | (((1ull << 12) - 1) << CXL_SSTP0_An_SegTableSize_SHIFT) | |
237 | #define CXL_SSTP0_An_STVA_U_MASK ((1ull << (63-49))-1) | |
238 | #define CXL_SSTP1_An_STVA_L_MASK (~((1ull << (63-55))-1)) | |
239 | #define CXL_SSTP1_An_V (1ull << (63-63)) | |
240 | ||
241 | /****** CXL_PSL_SLBIE_[An] **************************************************/ | |
242 | /* write: */ | |
243 | #define CXL_SLBIE_C PPC_BIT(36) /* Class */ | |
244 | #define CXL_SLBIE_SS PPC_BITMASK(37, 38) /* Segment Size */ | |
245 | #define CXL_SLBIE_SS_SHIFT PPC_BITLSHIFT(38) | |
246 | #define CXL_SLBIE_TA PPC_BIT(38) /* Tags Active */ | |
247 | /* read: */ | |
248 | #define CXL_SLBIE_MAX PPC_BITMASK(24, 31) | |
249 | #define CXL_SLBIE_PENDING PPC_BITMASK(56, 63) | |
250 | ||
251 | /****** Common to all CXL_TLBIA/SLBIA_[An] **********************************/ | |
252 | #define CXL_TLB_SLB_P (1ull) /* Pending (read) */ | |
253 | ||
254 | /****** Common to all CXL_TLB/SLB_IA/IE_[An] registers **********************/ | |
255 | #define CXL_TLB_SLB_IQ_ALL (0ull) /* Inv qualifier */ | |
256 | #define CXL_TLB_SLB_IQ_LPID (1ull) /* Inv qualifier */ | |
257 | #define CXL_TLB_SLB_IQ_LPIDPID (3ull) /* Inv qualifier */ | |
258 | ||
259 | /****** CXL_PSL_AFUSEL ******************************************************/ | |
260 | #define CXL_PSL_AFUSEL_A (1ull << (63-55)) /* Adapter wide invalidates affect all AFUs */ | |
261 | ||
262 | /****** CXL_PSL_DSISR_An ****************************************************/ | |
263 | #define CXL_PSL_DSISR_An_DS (1ull << (63-0)) /* Segment not found */ | |
264 | #define CXL_PSL_DSISR_An_DM (1ull << (63-1)) /* PTE not found (See also: M) or protection fault */ | |
265 | #define CXL_PSL_DSISR_An_ST (1ull << (63-2)) /* Segment Table PTE not found */ | |
266 | #define CXL_PSL_DSISR_An_UR (1ull << (63-3)) /* AURP PTE not found */ | |
267 | #define CXL_PSL_DSISR_TRANS (CXL_PSL_DSISR_An_DS | CXL_PSL_DSISR_An_DM | CXL_PSL_DSISR_An_ST | CXL_PSL_DSISR_An_UR) | |
268 | #define CXL_PSL_DSISR_An_PE (1ull << (63-4)) /* PSL Error (implementation specific) */ | |
269 | #define CXL_PSL_DSISR_An_AE (1ull << (63-5)) /* AFU Error */ | |
270 | #define CXL_PSL_DSISR_An_OC (1ull << (63-6)) /* OS Context Warning */ | |
271 | /* NOTE: Bits 32:63 are undefined if DSISR[DS] = 1 */ | |
272 | #define CXL_PSL_DSISR_An_M DSISR_NOHPTE /* PTE not found */ | |
273 | #define CXL_PSL_DSISR_An_P DSISR_PROTFAULT /* Storage protection violation */ | |
274 | #define CXL_PSL_DSISR_An_A (1ull << (63-37)) /* AFU lock access to write through or cache inhibited storage */ | |
275 | #define CXL_PSL_DSISR_An_S DSISR_ISSTORE /* Access was afu_wr or afu_zero */ | |
276 | #define CXL_PSL_DSISR_An_K DSISR_KEYFAULT /* Access not permitted by virtual page class key protection */ | |
277 | ||
278 | /****** CXL_PSL_TFC_An ******************************************************/ | |
279 | #define CXL_PSL_TFC_An_A (1ull << (63-28)) /* Acknowledge non-translation fault */ | |
280 | #define CXL_PSL_TFC_An_C (1ull << (63-29)) /* Continue (abort transaction) */ | |
281 | #define CXL_PSL_TFC_An_AE (1ull << (63-30)) /* Restart PSL with address error */ | |
282 | #define CXL_PSL_TFC_An_R (1ull << (63-31)) /* Restart PSL transaction */ | |
283 | ||
284 | /* cxl_process_element->software_status */ | |
285 | #define CXL_PE_SOFTWARE_STATE_V (1ul << (31 - 0)) /* Valid */ | |
286 | #define CXL_PE_SOFTWARE_STATE_C (1ul << (31 - 29)) /* Complete */ | |
287 | #define CXL_PE_SOFTWARE_STATE_S (1ul << (31 - 30)) /* Suspend */ | |
288 | #define CXL_PE_SOFTWARE_STATE_T (1ul << (31 - 31)) /* Terminate */ | |
289 | ||
d6a6af2c IM |
290 | /****** CXL_PSL_RXCTL_An (Implementation Specific) ************************** |
291 | * Controls AFU Hang Pulse, which sets the timeout for the AFU to respond to | |
292 | * the PSL for any response (except MMIO). Timeouts will occur between 1x to 2x | |
293 | * of the hang pulse frequency. | |
294 | */ | |
295 | #define CXL_PSL_RXCTL_AFUHP_4S 0x7000000000000000ULL | |
296 | ||
f204e0b8 IM |
297 | /* SPA->sw_command_status */ |
298 | #define CXL_SPA_SW_CMD_MASK 0xffff000000000000ULL | |
299 | #define CXL_SPA_SW_CMD_TERMINATE 0x0001000000000000ULL | |
300 | #define CXL_SPA_SW_CMD_REMOVE 0x0002000000000000ULL | |
301 | #define CXL_SPA_SW_CMD_SUSPEND 0x0003000000000000ULL | |
302 | #define CXL_SPA_SW_CMD_RESUME 0x0004000000000000ULL | |
303 | #define CXL_SPA_SW_CMD_ADD 0x0005000000000000ULL | |
304 | #define CXL_SPA_SW_CMD_UPDATE 0x0006000000000000ULL | |
305 | #define CXL_SPA_SW_STATE_MASK 0x0000ffff00000000ULL | |
306 | #define CXL_SPA_SW_STATE_TERMINATED 0x0000000100000000ULL | |
307 | #define CXL_SPA_SW_STATE_REMOVED 0x0000000200000000ULL | |
308 | #define CXL_SPA_SW_STATE_SUSPENDED 0x0000000300000000ULL | |
309 | #define CXL_SPA_SW_STATE_RESUMED 0x0000000400000000ULL | |
310 | #define CXL_SPA_SW_STATE_ADDED 0x0000000500000000ULL | |
311 | #define CXL_SPA_SW_STATE_UPDATED 0x0000000600000000ULL | |
312 | #define CXL_SPA_SW_PSL_ID_MASK 0x00000000ffff0000ULL | |
313 | #define CXL_SPA_SW_LINK_MASK 0x000000000000ffffULL | |
314 | ||
315 | #define CXL_MAX_SLICES 4 | |
316 | #define MAX_AFU_MMIO_REGS 3 | |
317 | ||
f204e0b8 IM |
318 | #define CXL_MODE_TIME_SLICED 0x4 |
319 | #define CXL_SUPPORTED_MODES (CXL_MODE_DEDICATED | CXL_MODE_DIRECTED) | |
320 | ||
321 | enum cxl_context_status { | |
322 | CLOSED, | |
323 | OPENED, | |
324 | STARTED | |
325 | }; | |
326 | ||
327 | enum prefault_modes { | |
328 | CXL_PREFAULT_NONE, | |
329 | CXL_PREFAULT_WED, | |
330 | CXL_PREFAULT_ALL, | |
331 | }; | |
332 | ||
333 | struct cxl_sste { | |
334 | __be64 esid_data; | |
335 | __be64 vsid_data; | |
336 | }; | |
337 | ||
338 | #define to_cxl_adapter(d) container_of(d, struct cxl, dev) | |
339 | #define to_cxl_afu(d) container_of(d, struct cxl_afu, dev) | |
340 | ||
341 | struct cxl_afu { | |
342 | irq_hw_number_t psl_hwirq; | |
343 | irq_hw_number_t serr_hwirq; | |
80fa93fc MN |
344 | char *err_irq_name; |
345 | char *psl_irq_name; | |
f204e0b8 IM |
346 | unsigned int serr_virq; |
347 | void __iomem *p1n_mmio; | |
348 | void __iomem *p2n_mmio; | |
349 | phys_addr_t psn_phys; | |
350 | u64 pp_offset; | |
351 | u64 pp_size; | |
352 | void __iomem *afu_desc_mmio; | |
353 | struct cxl *adapter; | |
354 | struct device dev; | |
355 | struct cdev afu_cdev_s, afu_cdev_m, afu_cdev_d; | |
356 | struct device *chardev_s, *chardev_m, *chardev_d; | |
357 | struct idr contexts_idr; | |
358 | struct dentry *debugfs; | |
ee41d11d | 359 | struct mutex contexts_lock; |
f204e0b8 IM |
360 | struct mutex spa_mutex; |
361 | spinlock_t afu_cntl_lock; | |
362 | ||
e36f6fe1 VJ |
363 | /* AFU error buffer fields and bin attribute for sysfs */ |
364 | u64 eb_len, eb_offset; | |
365 | struct bin_attribute attr_eb; | |
366 | ||
f204e0b8 IM |
367 | /* |
368 | * Only the first part of the SPA is used for the process element | |
369 | * linked list. The only other part that software needs to worry about | |
370 | * is sw_command_status, which we store a separate pointer to. | |
371 | * Everything else in the SPA is only used by hardware | |
372 | */ | |
373 | struct cxl_process_element *spa; | |
374 | __be64 *sw_command_status; | |
375 | unsigned int spa_size; | |
376 | int spa_order; | |
377 | int spa_max_procs; | |
378 | unsigned int psl_virq; | |
379 | ||
380 | int pp_irqs; | |
381 | int irqs_max; | |
382 | int num_procs; | |
383 | int max_procs_virtualised; | |
384 | int slice; | |
385 | int modes_supported; | |
386 | int current_mode; | |
b087e619 IM |
387 | int crs_num; |
388 | u64 crs_len; | |
389 | u64 crs_offset; | |
390 | struct list_head crs; | |
f204e0b8 IM |
391 | enum prefault_modes prefault_mode; |
392 | bool psa; | |
393 | bool pp_psa; | |
394 | bool enabled; | |
395 | }; | |
396 | ||
80fa93fc MN |
397 | |
398 | struct cxl_irq_name { | |
399 | struct list_head list; | |
400 | char *name; | |
401 | }; | |
402 | ||
f204e0b8 IM |
403 | /* |
404 | * This is a cxl context. If the PSL is in dedicated mode, there will be one | |
405 | * of these per AFU. If in AFU directed there can be lots of these. | |
406 | */ | |
407 | struct cxl_context { | |
408 | struct cxl_afu *afu; | |
409 | ||
410 | /* Problem state MMIO */ | |
411 | phys_addr_t psn_phys; | |
412 | u64 psn_size; | |
413 | ||
b123429e IM |
414 | /* Used to unmap any mmaps when force detaching */ |
415 | struct address_space *mapping; | |
416 | struct mutex mapping_lock; | |
417 | ||
f204e0b8 IM |
418 | spinlock_t sste_lock; /* Protects segment table entries */ |
419 | struct cxl_sste *sstp; | |
420 | u64 sstp0, sstp1; | |
421 | unsigned int sst_size, sst_lru; | |
422 | ||
423 | wait_queue_head_t wq; | |
424 | struct pid *pid; | |
425 | spinlock_t lock; /* Protects pending_irq_mask, pending_fault and fault_addr */ | |
426 | /* Only used in PR mode */ | |
427 | u64 process_token; | |
428 | ||
429 | unsigned long *irq_bitmap; /* Accessed from IRQ context */ | |
430 | struct cxl_irq_ranges irqs; | |
80fa93fc | 431 | struct list_head irq_names; |
f204e0b8 IM |
432 | u64 fault_addr; |
433 | u64 fault_dsisr; | |
434 | u64 afu_err; | |
435 | ||
436 | /* | |
437 | * This status and it's lock pretects start and detach context | |
438 | * from racing. It also prevents detach from racing with | |
439 | * itself | |
440 | */ | |
441 | enum cxl_context_status status; | |
442 | struct mutex status_mutex; | |
443 | ||
444 | ||
445 | /* XXX: Is it possible to need multiple work items at once? */ | |
446 | struct work_struct fault_work; | |
447 | u64 dsisr; | |
448 | u64 dar; | |
449 | ||
450 | struct cxl_process_element *elem; | |
451 | ||
452 | int pe; /* process element handle */ | |
453 | u32 irq_count; | |
454 | bool pe_inserted; | |
455 | bool master; | |
456 | bool kernel; | |
457 | bool pending_irq; | |
458 | bool pending_fault; | |
459 | bool pending_afu_err; | |
8ac75b96 IM |
460 | |
461 | struct rcu_head rcu; | |
f204e0b8 IM |
462 | }; |
463 | ||
464 | struct cxl { | |
465 | void __iomem *p1_mmio; | |
466 | void __iomem *p2_mmio; | |
467 | irq_hw_number_t err_hwirq; | |
468 | unsigned int err_virq; | |
469 | spinlock_t afu_list_lock; | |
470 | struct cxl_afu *afu[CXL_MAX_SLICES]; | |
471 | struct device dev; | |
472 | struct dentry *trace; | |
473 | struct dentry *psl_err_chk; | |
474 | struct dentry *debugfs; | |
80fa93fc | 475 | char *irq_name; |
f204e0b8 IM |
476 | struct bin_attribute cxl_attr; |
477 | int adapter_num; | |
478 | int user_irqs; | |
479 | u64 afu_desc_off; | |
480 | u64 afu_desc_size; | |
481 | u64 ps_off; | |
482 | u64 ps_size; | |
483 | u16 psl_rev; | |
484 | u16 base_image; | |
485 | u8 vsec_status; | |
486 | u8 caia_major; | |
487 | u8 caia_minor; | |
488 | u8 slices; | |
489 | bool user_image_loaded; | |
490 | bool perst_loads_image; | |
491 | bool perst_select_user; | |
492 | }; | |
493 | ||
494 | int cxl_alloc_one_irq(struct cxl *adapter); | |
495 | void cxl_release_one_irq(struct cxl *adapter, int hwirq); | |
496 | int cxl_alloc_irq_ranges(struct cxl_irq_ranges *irqs, struct cxl *adapter, unsigned int num); | |
497 | void cxl_release_irq_ranges(struct cxl_irq_ranges *irqs, struct cxl *adapter); | |
498 | int cxl_setup_irq(struct cxl *adapter, unsigned int hwirq, unsigned int virq); | |
4beb5421 | 499 | int cxl_update_image_control(struct cxl *adapter); |
62fa19d4 | 500 | int cxl_reset(struct cxl *adapter); |
f204e0b8 IM |
501 | |
502 | /* common == phyp + powernv */ | |
503 | struct cxl_process_element_common { | |
504 | __be32 tid; | |
505 | __be32 pid; | |
506 | __be64 csrp; | |
507 | __be64 aurp0; | |
508 | __be64 aurp1; | |
509 | __be64 sstp0; | |
510 | __be64 sstp1; | |
511 | __be64 amr; | |
512 | u8 reserved3[4]; | |
513 | __be64 wed; | |
514 | } __packed; | |
515 | ||
516 | /* just powernv */ | |
517 | struct cxl_process_element { | |
518 | __be64 sr; | |
519 | __be64 SPOffset; | |
520 | __be64 sdr; | |
521 | __be64 haurp; | |
522 | __be32 ctxtime; | |
523 | __be16 ivte_offsets[4]; | |
524 | __be16 ivte_ranges[4]; | |
525 | __be32 lpid; | |
526 | struct cxl_process_element_common common; | |
527 | __be32 software_state; | |
528 | } __packed; | |
529 | ||
530 | static inline void __iomem *_cxl_p1_addr(struct cxl *cxl, cxl_p1_reg_t reg) | |
531 | { | |
532 | WARN_ON(!cpu_has_feature(CPU_FTR_HVMODE)); | |
533 | return cxl->p1_mmio + cxl_reg_off(reg); | |
534 | } | |
535 | ||
536 | #define cxl_p1_write(cxl, reg, val) \ | |
537 | out_be64(_cxl_p1_addr(cxl, reg), val) | |
538 | #define cxl_p1_read(cxl, reg) \ | |
539 | in_be64(_cxl_p1_addr(cxl, reg)) | |
540 | ||
541 | static inline void __iomem *_cxl_p1n_addr(struct cxl_afu *afu, cxl_p1n_reg_t reg) | |
542 | { | |
543 | WARN_ON(!cpu_has_feature(CPU_FTR_HVMODE)); | |
544 | return afu->p1n_mmio + cxl_reg_off(reg); | |
545 | } | |
546 | ||
547 | #define cxl_p1n_write(afu, reg, val) \ | |
548 | out_be64(_cxl_p1n_addr(afu, reg), val) | |
549 | #define cxl_p1n_read(afu, reg) \ | |
550 | in_be64(_cxl_p1n_addr(afu, reg)) | |
551 | ||
552 | static inline void __iomem *_cxl_p2n_addr(struct cxl_afu *afu, cxl_p2n_reg_t reg) | |
553 | { | |
554 | return afu->p2n_mmio + cxl_reg_off(reg); | |
555 | } | |
556 | ||
557 | #define cxl_p2n_write(afu, reg, val) \ | |
558 | out_be64(_cxl_p2n_addr(afu, reg), val) | |
559 | #define cxl_p2n_read(afu, reg) \ | |
560 | in_be64(_cxl_p2n_addr(afu, reg)) | |
561 | ||
b087e619 IM |
562 | |
563 | #define cxl_afu_cr_read64(afu, cr, off) \ | |
564 | in_le64((afu)->afu_desc_mmio + (afu)->crs_offset + ((cr) * (afu)->crs_len) + (off)) | |
565 | #define cxl_afu_cr_read32(afu, cr, off) \ | |
566 | in_le32((afu)->afu_desc_mmio + (afu)->crs_offset + ((cr) * (afu)->crs_len) + (off)) | |
567 | u16 cxl_afu_cr_read16(struct cxl_afu *afu, int cr, u64 off); | |
568 | u8 cxl_afu_cr_read8(struct cxl_afu *afu, int cr, u64 off); | |
569 | ||
e36f6fe1 VJ |
570 | ssize_t cxl_afu_read_err_buffer(struct cxl_afu *afu, char *buf, |
571 | loff_t off, size_t count); | |
572 | ||
b087e619 | 573 | |
f204e0b8 IM |
574 | struct cxl_calls { |
575 | void (*cxl_slbia)(struct mm_struct *mm); | |
576 | struct module *owner; | |
577 | }; | |
578 | int register_cxl_calls(struct cxl_calls *calls); | |
579 | void unregister_cxl_calls(struct cxl_calls *calls); | |
580 | ||
581 | int cxl_alloc_adapter_nr(struct cxl *adapter); | |
582 | void cxl_remove_adapter_nr(struct cxl *adapter); | |
583 | ||
584 | int cxl_file_init(void); | |
585 | void cxl_file_exit(void); | |
586 | int cxl_register_adapter(struct cxl *adapter); | |
587 | int cxl_register_afu(struct cxl_afu *afu); | |
588 | int cxl_chardev_d_afu_add(struct cxl_afu *afu); | |
589 | int cxl_chardev_m_afu_add(struct cxl_afu *afu); | |
590 | int cxl_chardev_s_afu_add(struct cxl_afu *afu); | |
591 | void cxl_chardev_afu_remove(struct cxl_afu *afu); | |
592 | ||
593 | void cxl_context_detach_all(struct cxl_afu *afu); | |
594 | void cxl_context_free(struct cxl_context *ctx); | |
595 | void cxl_context_detach(struct cxl_context *ctx); | |
596 | ||
597 | int cxl_sysfs_adapter_add(struct cxl *adapter); | |
598 | void cxl_sysfs_adapter_remove(struct cxl *adapter); | |
599 | int cxl_sysfs_afu_add(struct cxl_afu *afu); | |
600 | void cxl_sysfs_afu_remove(struct cxl_afu *afu); | |
601 | int cxl_sysfs_afu_m_add(struct cxl_afu *afu); | |
602 | void cxl_sysfs_afu_m_remove(struct cxl_afu *afu); | |
603 | ||
604 | int cxl_afu_activate_mode(struct cxl_afu *afu, int mode); | |
605 | int _cxl_afu_deactivate_mode(struct cxl_afu *afu, int mode); | |
606 | int cxl_afu_deactivate_mode(struct cxl_afu *afu); | |
607 | int cxl_afu_select_best_mode(struct cxl_afu *afu); | |
608 | ||
f204e0b8 IM |
609 | int cxl_register_psl_irq(struct cxl_afu *afu); |
610 | void cxl_release_psl_irq(struct cxl_afu *afu); | |
611 | int cxl_register_psl_err_irq(struct cxl *adapter); | |
612 | void cxl_release_psl_err_irq(struct cxl *adapter); | |
613 | int cxl_register_serr_irq(struct cxl_afu *afu); | |
614 | void cxl_release_serr_irq(struct cxl_afu *afu); | |
615 | int afu_register_irqs(struct cxl_context *ctx, u32 count); | |
6428832a | 616 | void afu_release_irqs(struct cxl_context *ctx, void *cookie); |
f204e0b8 IM |
617 | irqreturn_t cxl_slice_irq_err(int irq, void *data); |
618 | ||
619 | int cxl_debugfs_init(void); | |
620 | void cxl_debugfs_exit(void); | |
621 | int cxl_debugfs_adapter_add(struct cxl *adapter); | |
622 | void cxl_debugfs_adapter_remove(struct cxl *adapter); | |
623 | int cxl_debugfs_afu_add(struct cxl_afu *afu); | |
624 | void cxl_debugfs_afu_remove(struct cxl_afu *afu); | |
625 | ||
626 | void cxl_handle_fault(struct work_struct *work); | |
627 | void cxl_prefault(struct cxl_context *ctx, u64 wed); | |
628 | ||
629 | struct cxl *get_cxl_adapter(int num); | |
630 | int cxl_alloc_sst(struct cxl_context *ctx); | |
631 | ||
632 | void init_cxl_native(void); | |
633 | ||
634 | struct cxl_context *cxl_context_alloc(void); | |
b123429e IM |
635 | int cxl_context_init(struct cxl_context *ctx, struct cxl_afu *afu, bool master, |
636 | struct address_space *mapping); | |
f204e0b8 IM |
637 | void cxl_context_free(struct cxl_context *ctx); |
638 | int cxl_context_iomap(struct cxl_context *ctx, struct vm_area_struct *vma); | |
1a1a94b8 MN |
639 | unsigned int cxl_map_irq(struct cxl *adapter, irq_hw_number_t hwirq, |
640 | irq_handler_t handler, void *cookie, const char *name); | |
641 | void cxl_unmap_irq(unsigned int virq, void *cookie); | |
eda3693c | 642 | int __detach_context(struct cxl_context *ctx); |
f204e0b8 IM |
643 | |
644 | /* This matches the layout of the H_COLLECT_CA_INT_INFO retbuf */ | |
645 | struct cxl_irq_info { | |
646 | u64 dsisr; | |
647 | u64 dar; | |
648 | u64 dsr; | |
649 | u32 pid; | |
650 | u32 tid; | |
651 | u64 afu_err; | |
652 | u64 errstat; | |
653 | u64 padding[3]; /* to match the expected retbuf size for plpar_hcall9 */ | |
654 | }; | |
655 | ||
1a1a94b8 | 656 | void cxl_assign_psn_space(struct cxl_context *ctx); |
f204e0b8 IM |
657 | int cxl_attach_process(struct cxl_context *ctx, bool kernel, u64 wed, |
658 | u64 amr); | |
659 | int cxl_detach_process(struct cxl_context *ctx); | |
660 | ||
bc78b05b | 661 | int cxl_get_irq(struct cxl_afu *afu, struct cxl_irq_info *info); |
f204e0b8 IM |
662 | int cxl_ack_irq(struct cxl_context *ctx, u64 tfc, u64 psl_reset_mask); |
663 | ||
664 | int cxl_check_error(struct cxl_afu *afu); | |
665 | int cxl_afu_slbia(struct cxl_afu *afu); | |
666 | int cxl_tlb_slb_invalidate(struct cxl *adapter); | |
667 | int cxl_afu_disable(struct cxl_afu *afu); | |
b12994fb | 668 | int __cxl_afu_reset(struct cxl_afu *afu); |
1a1a94b8 | 669 | int cxl_afu_check_and_enable(struct cxl_afu *afu); |
f204e0b8 IM |
670 | int cxl_psl_purge(struct cxl_afu *afu); |
671 | ||
672 | void cxl_stop_trace(struct cxl *cxl); | |
673 | ||
674 | extern struct pci_driver cxl_pci_driver; | |
c358d84b | 675 | int afu_allocate_irqs(struct cxl_context *ctx, u32 count); |
f204e0b8 IM |
676 | |
677 | #endif |