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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
f204e0b8 IM |
2 | /* |
3 | * Copyright 2014 IBM Corp. | |
f204e0b8 IM |
4 | */ |
5 | ||
6 | #include <linux/pci_regs.h> | |
7 | #include <linux/pci_ids.h> | |
8 | #include <linux/device.h> | |
9 | #include <linux/module.h> | |
10 | #include <linux/kernel.h> | |
11 | #include <linux/slab.h> | |
12 | #include <linux/sort.h> | |
13 | #include <linux/pci.h> | |
14 | #include <linux/of.h> | |
15 | #include <linux/delay.h> | |
16 | #include <asm/opal.h> | |
17 | #include <asm/msi_bitmap.h> | |
f204e0b8 | 18 | #include <asm/pnv-pci.h> |
62fa19d4 | 19 | #include <asm/io.h> |
aa14138a | 20 | #include <asm/reg.h> |
f204e0b8 IM |
21 | |
22 | #include "cxl.h" | |
9e8df8a2 | 23 | #include <misc/cxl.h> |
f204e0b8 IM |
24 | |
25 | ||
26 | #define CXL_PCI_VSEC_ID 0x1280 | |
27 | #define CXL_VSEC_MIN_SIZE 0x80 | |
28 | ||
29 | #define CXL_READ_VSEC_LENGTH(dev, vsec, dest) \ | |
30 | { \ | |
31 | pci_read_config_word(dev, vsec + 0x6, dest); \ | |
32 | *dest >>= 4; \ | |
33 | } | |
34 | #define CXL_READ_VSEC_NAFUS(dev, vsec, dest) \ | |
35 | pci_read_config_byte(dev, vsec + 0x8, dest) | |
36 | ||
37 | #define CXL_READ_VSEC_STATUS(dev, vsec, dest) \ | |
38 | pci_read_config_byte(dev, vsec + 0x9, dest) | |
39 | #define CXL_STATUS_SECOND_PORT 0x80 | |
40 | #define CXL_STATUS_MSI_X_FULL 0x40 | |
41 | #define CXL_STATUS_MSI_X_SINGLE 0x20 | |
42 | #define CXL_STATUS_FLASH_RW 0x08 | |
43 | #define CXL_STATUS_FLASH_RO 0x04 | |
44 | #define CXL_STATUS_LOADABLE_AFU 0x02 | |
45 | #define CXL_STATUS_LOADABLE_PSL 0x01 | |
46 | /* If we see these features we won't try to use the card */ | |
47 | #define CXL_UNSUPPORTED_FEATURES \ | |
48 | (CXL_STATUS_MSI_X_FULL | CXL_STATUS_MSI_X_SINGLE) | |
49 | ||
50 | #define CXL_READ_VSEC_MODE_CONTROL(dev, vsec, dest) \ | |
51 | pci_read_config_byte(dev, vsec + 0xa, dest) | |
52 | #define CXL_WRITE_VSEC_MODE_CONTROL(dev, vsec, val) \ | |
53 | pci_write_config_byte(dev, vsec + 0xa, val) | |
54 | #define CXL_VSEC_PROTOCOL_MASK 0xe0 | |
55 | #define CXL_VSEC_PROTOCOL_1024TB 0x80 | |
56 | #define CXL_VSEC_PROTOCOL_512TB 0x40 | |
f24be42a | 57 | #define CXL_VSEC_PROTOCOL_256TB 0x20 /* Power 8/9 uses this */ |
f204e0b8 IM |
58 | #define CXL_VSEC_PROTOCOL_ENABLE 0x01 |
59 | ||
60 | #define CXL_READ_VSEC_PSL_REVISION(dev, vsec, dest) \ | |
61 | pci_read_config_word(dev, vsec + 0xc, dest) | |
62 | #define CXL_READ_VSEC_CAIA_MINOR(dev, vsec, dest) \ | |
63 | pci_read_config_byte(dev, vsec + 0xe, dest) | |
64 | #define CXL_READ_VSEC_CAIA_MAJOR(dev, vsec, dest) \ | |
65 | pci_read_config_byte(dev, vsec + 0xf, dest) | |
66 | #define CXL_READ_VSEC_BASE_IMAGE(dev, vsec, dest) \ | |
67 | pci_read_config_word(dev, vsec + 0x10, dest) | |
68 | ||
69 | #define CXL_READ_VSEC_IMAGE_STATE(dev, vsec, dest) \ | |
70 | pci_read_config_byte(dev, vsec + 0x13, dest) | |
71 | #define CXL_WRITE_VSEC_IMAGE_STATE(dev, vsec, val) \ | |
72 | pci_write_config_byte(dev, vsec + 0x13, val) | |
73 | #define CXL_VSEC_USER_IMAGE_LOADED 0x80 /* RO */ | |
74 | #define CXL_VSEC_PERST_LOADS_IMAGE 0x20 /* RW */ | |
75 | #define CXL_VSEC_PERST_SELECT_USER 0x10 /* RW */ | |
76 | ||
77 | #define CXL_READ_VSEC_AFU_DESC_OFF(dev, vsec, dest) \ | |
78 | pci_read_config_dword(dev, vsec + 0x20, dest) | |
79 | #define CXL_READ_VSEC_AFU_DESC_SIZE(dev, vsec, dest) \ | |
80 | pci_read_config_dword(dev, vsec + 0x24, dest) | |
81 | #define CXL_READ_VSEC_PS_OFF(dev, vsec, dest) \ | |
82 | pci_read_config_dword(dev, vsec + 0x28, dest) | |
83 | #define CXL_READ_VSEC_PS_SIZE(dev, vsec, dest) \ | |
84 | pci_read_config_dword(dev, vsec + 0x2c, dest) | |
85 | ||
86 | ||
87 | /* This works a little different than the p1/p2 register accesses to make it | |
88 | * easier to pull out individual fields */ | |
cbffa3a5 CL |
89 | #define AFUD_READ(afu, off) in_be64(afu->native->afu_desc_mmio + off) |
90 | #define AFUD_READ_LE(afu, off) in_le64(afu->native->afu_desc_mmio + off) | |
f204e0b8 IM |
91 | #define EXTRACT_PPC_BIT(val, bit) (!!(val & PPC_BIT(bit))) |
92 | #define EXTRACT_PPC_BITS(val, bs, be) ((val & PPC_BITMASK(bs, be)) >> PPC_BITLSHIFT(be)) | |
93 | ||
94 | #define AFUD_READ_INFO(afu) AFUD_READ(afu, 0x0) | |
95 | #define AFUD_NUM_INTS_PER_PROC(val) EXTRACT_PPC_BITS(val, 0, 15) | |
96 | #define AFUD_NUM_PROCS(val) EXTRACT_PPC_BITS(val, 16, 31) | |
97 | #define AFUD_NUM_CRS(val) EXTRACT_PPC_BITS(val, 32, 47) | |
98 | #define AFUD_MULTIMODE(val) EXTRACT_PPC_BIT(val, 48) | |
99 | #define AFUD_PUSH_BLOCK_TRANSFER(val) EXTRACT_PPC_BIT(val, 55) | |
100 | #define AFUD_DEDICATED_PROCESS(val) EXTRACT_PPC_BIT(val, 59) | |
101 | #define AFUD_AFU_DIRECTED(val) EXTRACT_PPC_BIT(val, 61) | |
102 | #define AFUD_TIME_SLICED(val) EXTRACT_PPC_BIT(val, 63) | |
103 | #define AFUD_READ_CR(afu) AFUD_READ(afu, 0x20) | |
104 | #define AFUD_CR_LEN(val) EXTRACT_PPC_BITS(val, 8, 63) | |
105 | #define AFUD_READ_CR_OFF(afu) AFUD_READ(afu, 0x28) | |
106 | #define AFUD_READ_PPPSA(afu) AFUD_READ(afu, 0x30) | |
107 | #define AFUD_PPPSA_PP(val) EXTRACT_PPC_BIT(val, 6) | |
108 | #define AFUD_PPPSA_PSA(val) EXTRACT_PPC_BIT(val, 7) | |
109 | #define AFUD_PPPSA_LEN(val) EXTRACT_PPC_BITS(val, 8, 63) | |
110 | #define AFUD_READ_PPPSA_OFF(afu) AFUD_READ(afu, 0x38) | |
111 | #define AFUD_READ_EB(afu) AFUD_READ(afu, 0x40) | |
112 | #define AFUD_EB_LEN(val) EXTRACT_PPC_BITS(val, 8, 63) | |
113 | #define AFUD_READ_EB_OFF(afu) AFUD_READ(afu, 0x48) | |
114 | ||
f47f966f | 115 | static const struct pci_device_id cxl_pci_tbl[] = { |
f204e0b8 IM |
116 | { PCI_DEVICE(PCI_VENDOR_ID_IBM, 0x0477), }, |
117 | { PCI_DEVICE(PCI_VENDOR_ID_IBM, 0x044b), }, | |
118 | { PCI_DEVICE(PCI_VENDOR_ID_IBM, 0x04cf), }, | |
68adb7bf | 119 | { PCI_DEVICE(PCI_VENDOR_ID_IBM, 0x0601), }, |
41e20d95 MO |
120 | { PCI_DEVICE(PCI_VENDOR_ID_IBM, 0x0623), }, |
121 | { PCI_DEVICE(PCI_VENDOR_ID_IBM, 0x0628), }, | |
f204e0b8 IM |
122 | { } |
123 | }; | |
124 | MODULE_DEVICE_TABLE(pci, cxl_pci_tbl); | |
125 | ||
126 | ||
127 | /* | |
128 | * Mostly using these wrappers to avoid confusion: | |
129 | * priv 1 is BAR2, while priv 2 is BAR0 | |
130 | */ | |
131 | static inline resource_size_t p1_base(struct pci_dev *dev) | |
132 | { | |
133 | return pci_resource_start(dev, 2); | |
134 | } | |
135 | ||
136 | static inline resource_size_t p1_size(struct pci_dev *dev) | |
137 | { | |
138 | return pci_resource_len(dev, 2); | |
139 | } | |
140 | ||
141 | static inline resource_size_t p2_base(struct pci_dev *dev) | |
142 | { | |
143 | return pci_resource_start(dev, 0); | |
144 | } | |
145 | ||
146 | static inline resource_size_t p2_size(struct pci_dev *dev) | |
147 | { | |
148 | return pci_resource_len(dev, 0); | |
149 | } | |
150 | ||
151 | static int find_cxl_vsec(struct pci_dev *dev) | |
152 | { | |
0e1cd3d9 | 153 | return pci_find_vsec_capability(dev, PCI_VENDOR_ID_IBM, CXL_PCI_VSEC_ID); |
f204e0b8 IM |
154 | } |
155 | ||
156 | static void dump_cxl_config_space(struct pci_dev *dev) | |
157 | { | |
158 | int vsec; | |
159 | u32 val; | |
160 | ||
161 | dev_info(&dev->dev, "dump_cxl_config_space\n"); | |
162 | ||
163 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &val); | |
164 | dev_info(&dev->dev, "BAR0: %#.8x\n", val); | |
165 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, &val); | |
166 | dev_info(&dev->dev, "BAR1: %#.8x\n", val); | |
167 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_2, &val); | |
168 | dev_info(&dev->dev, "BAR2: %#.8x\n", val); | |
169 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_3, &val); | |
170 | dev_info(&dev->dev, "BAR3: %#.8x\n", val); | |
171 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_4, &val); | |
172 | dev_info(&dev->dev, "BAR4: %#.8x\n", val); | |
173 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_5, &val); | |
174 | dev_info(&dev->dev, "BAR5: %#.8x\n", val); | |
175 | ||
176 | dev_info(&dev->dev, "p1 regs: %#llx, len: %#llx\n", | |
177 | p1_base(dev), p1_size(dev)); | |
178 | dev_info(&dev->dev, "p2 regs: %#llx, len: %#llx\n", | |
f2931069 | 179 | p2_base(dev), p2_size(dev)); |
f204e0b8 IM |
180 | dev_info(&dev->dev, "BAR 4/5: %#llx, len: %#llx\n", |
181 | pci_resource_start(dev, 4), pci_resource_len(dev, 4)); | |
182 | ||
183 | if (!(vsec = find_cxl_vsec(dev))) | |
184 | return; | |
185 | ||
186 | #define show_reg(name, what) \ | |
187 | dev_info(&dev->dev, "cxl vsec: %30s: %#x\n", name, what) | |
188 | ||
189 | pci_read_config_dword(dev, vsec + 0x0, &val); | |
190 | show_reg("Cap ID", (val >> 0) & 0xffff); | |
191 | show_reg("Cap Ver", (val >> 16) & 0xf); | |
192 | show_reg("Next Cap Ptr", (val >> 20) & 0xfff); | |
193 | pci_read_config_dword(dev, vsec + 0x4, &val); | |
194 | show_reg("VSEC ID", (val >> 0) & 0xffff); | |
195 | show_reg("VSEC Rev", (val >> 16) & 0xf); | |
196 | show_reg("VSEC Length", (val >> 20) & 0xfff); | |
197 | pci_read_config_dword(dev, vsec + 0x8, &val); | |
198 | show_reg("Num AFUs", (val >> 0) & 0xff); | |
199 | show_reg("Status", (val >> 8) & 0xff); | |
200 | show_reg("Mode Control", (val >> 16) & 0xff); | |
201 | show_reg("Reserved", (val >> 24) & 0xff); | |
202 | pci_read_config_dword(dev, vsec + 0xc, &val); | |
203 | show_reg("PSL Rev", (val >> 0) & 0xffff); | |
204 | show_reg("CAIA Ver", (val >> 16) & 0xffff); | |
205 | pci_read_config_dword(dev, vsec + 0x10, &val); | |
206 | show_reg("Base Image Rev", (val >> 0) & 0xffff); | |
207 | show_reg("Reserved", (val >> 16) & 0x0fff); | |
208 | show_reg("Image Control", (val >> 28) & 0x3); | |
209 | show_reg("Reserved", (val >> 30) & 0x1); | |
210 | show_reg("Image Loaded", (val >> 31) & 0x1); | |
211 | ||
212 | pci_read_config_dword(dev, vsec + 0x14, &val); | |
213 | show_reg("Reserved", val); | |
214 | pci_read_config_dword(dev, vsec + 0x18, &val); | |
215 | show_reg("Reserved", val); | |
216 | pci_read_config_dword(dev, vsec + 0x1c, &val); | |
217 | show_reg("Reserved", val); | |
218 | ||
219 | pci_read_config_dword(dev, vsec + 0x20, &val); | |
220 | show_reg("AFU Descriptor Offset", val); | |
221 | pci_read_config_dword(dev, vsec + 0x24, &val); | |
222 | show_reg("AFU Descriptor Size", val); | |
223 | pci_read_config_dword(dev, vsec + 0x28, &val); | |
224 | show_reg("Problem State Offset", val); | |
225 | pci_read_config_dword(dev, vsec + 0x2c, &val); | |
226 | show_reg("Problem State Size", val); | |
227 | ||
228 | pci_read_config_dword(dev, vsec + 0x30, &val); | |
229 | show_reg("Reserved", val); | |
230 | pci_read_config_dword(dev, vsec + 0x34, &val); | |
231 | show_reg("Reserved", val); | |
232 | pci_read_config_dword(dev, vsec + 0x38, &val); | |
233 | show_reg("Reserved", val); | |
234 | pci_read_config_dword(dev, vsec + 0x3c, &val); | |
235 | show_reg("Reserved", val); | |
236 | ||
237 | pci_read_config_dword(dev, vsec + 0x40, &val); | |
238 | show_reg("PSL Programming Port", val); | |
239 | pci_read_config_dword(dev, vsec + 0x44, &val); | |
240 | show_reg("PSL Programming Control", val); | |
241 | ||
242 | pci_read_config_dword(dev, vsec + 0x48, &val); | |
243 | show_reg("Reserved", val); | |
244 | pci_read_config_dword(dev, vsec + 0x4c, &val); | |
245 | show_reg("Reserved", val); | |
246 | ||
247 | pci_read_config_dword(dev, vsec + 0x50, &val); | |
248 | show_reg("Flash Address Register", val); | |
249 | pci_read_config_dword(dev, vsec + 0x54, &val); | |
250 | show_reg("Flash Size Register", val); | |
251 | pci_read_config_dword(dev, vsec + 0x58, &val); | |
252 | show_reg("Flash Status/Control Register", val); | |
253 | pci_read_config_dword(dev, vsec + 0x58, &val); | |
254 | show_reg("Flash Data Port", val); | |
255 | ||
256 | #undef show_reg | |
257 | } | |
258 | ||
259 | static void dump_afu_descriptor(struct cxl_afu *afu) | |
260 | { | |
bfcdc8ff MN |
261 | u64 val, afu_cr_num, afu_cr_off, afu_cr_len; |
262 | int i; | |
f204e0b8 IM |
263 | |
264 | #define show_reg(name, what) \ | |
265 | dev_info(&afu->dev, "afu desc: %30s: %#llx\n", name, what) | |
266 | ||
267 | val = AFUD_READ_INFO(afu); | |
268 | show_reg("num_ints_per_process", AFUD_NUM_INTS_PER_PROC(val)); | |
269 | show_reg("num_of_processes", AFUD_NUM_PROCS(val)); | |
270 | show_reg("num_of_afu_CRs", AFUD_NUM_CRS(val)); | |
271 | show_reg("req_prog_mode", val & 0xffffULL); | |
bfcdc8ff | 272 | afu_cr_num = AFUD_NUM_CRS(val); |
f204e0b8 IM |
273 | |
274 | val = AFUD_READ(afu, 0x8); | |
275 | show_reg("Reserved", val); | |
276 | val = AFUD_READ(afu, 0x10); | |
277 | show_reg("Reserved", val); | |
278 | val = AFUD_READ(afu, 0x18); | |
279 | show_reg("Reserved", val); | |
280 | ||
281 | val = AFUD_READ_CR(afu); | |
282 | show_reg("Reserved", (val >> (63-7)) & 0xff); | |
283 | show_reg("AFU_CR_len", AFUD_CR_LEN(val)); | |
bfcdc8ff | 284 | afu_cr_len = AFUD_CR_LEN(val) * 256; |
f204e0b8 IM |
285 | |
286 | val = AFUD_READ_CR_OFF(afu); | |
bfcdc8ff | 287 | afu_cr_off = val; |
f204e0b8 IM |
288 | show_reg("AFU_CR_offset", val); |
289 | ||
290 | val = AFUD_READ_PPPSA(afu); | |
291 | show_reg("PerProcessPSA_control", (val >> (63-7)) & 0xff); | |
292 | show_reg("PerProcessPSA Length", AFUD_PPPSA_LEN(val)); | |
293 | ||
294 | val = AFUD_READ_PPPSA_OFF(afu); | |
295 | show_reg("PerProcessPSA_offset", val); | |
296 | ||
297 | val = AFUD_READ_EB(afu); | |
298 | show_reg("Reserved", (val >> (63-7)) & 0xff); | |
299 | show_reg("AFU_EB_len", AFUD_EB_LEN(val)); | |
300 | ||
301 | val = AFUD_READ_EB_OFF(afu); | |
302 | show_reg("AFU_EB_offset", val); | |
303 | ||
bfcdc8ff MN |
304 | for (i = 0; i < afu_cr_num; i++) { |
305 | val = AFUD_READ_LE(afu, afu_cr_off + i * afu_cr_len); | |
306 | show_reg("CR Vendor", val & 0xffff); | |
307 | show_reg("CR Device", (val >> 16) & 0xffff); | |
308 | } | |
f204e0b8 IM |
309 | #undef show_reg |
310 | } | |
311 | ||
abd1d99b CL |
312 | #define P8_CAPP_UNIT0_ID 0xBA |
313 | #define P8_CAPP_UNIT1_ID 0XBE | |
f24be42a CL |
314 | #define P9_CAPP_UNIT0_ID 0xC0 |
315 | #define P9_CAPP_UNIT1_ID 0xE0 | |
aa14138a | 316 | |
f24be42a | 317 | static int get_phb_index(struct device_node *np, u32 *phb_index) |
aa14138a | 318 | { |
f24be42a CL |
319 | if (of_property_read_u32(np, "ibm,phb-index", phb_index)) |
320 | return -ENODEV; | |
321 | return 0; | |
322 | } | |
aa14138a | 323 | |
f24be42a CL |
324 | static u64 get_capp_unit_id(struct device_node *np, u32 phb_index) |
325 | { | |
aa14138a | 326 | /* |
abd1d99b CL |
327 | * POWER 8: |
328 | * - For chips other than POWER8NVL, we only have CAPP 0, | |
329 | * irrespective of which PHB is used. | |
330 | * - For POWER8NVL, assume CAPP 0 is attached to PHB0 and | |
331 | * CAPP 1 is attached to PHB1. | |
aa14138a | 332 | */ |
abd1d99b CL |
333 | if (cxl_is_power8()) { |
334 | if (!pvr_version_is(PVR_POWER8NVL)) | |
335 | return P8_CAPP_UNIT0_ID; | |
aa14138a | 336 | |
abd1d99b CL |
337 | if (phb_index == 0) |
338 | return P8_CAPP_UNIT0_ID; | |
aa14138a | 339 | |
abd1d99b CL |
340 | if (phb_index == 1) |
341 | return P8_CAPP_UNIT1_ID; | |
342 | } | |
aa14138a PB |
343 | |
344 | /* | |
f24be42a CL |
345 | * POWER 9: |
346 | * PEC0 (PHB0). Capp ID = CAPP0 (0b1100_0000) | |
347 | * PEC1 (PHB1 - PHB2). No capi mode | |
348 | * PEC2 (PHB3 - PHB4 - PHB5): Capi mode on PHB3 only. Capp ID = CAPP1 (0b1110_0000) | |
aa14138a | 349 | */ |
f24be42a CL |
350 | if (cxl_is_power9()) { |
351 | if (phb_index == 0) | |
352 | return P9_CAPP_UNIT0_ID; | |
aa14138a | 353 | |
f24be42a CL |
354 | if (phb_index == 3) |
355 | return P9_CAPP_UNIT1_ID; | |
356 | } | |
aa14138a PB |
357 | |
358 | return 0; | |
359 | } | |
360 | ||
3ced8d73 | 361 | int cxl_calc_capp_routing(struct pci_dev *dev, u64 *chipid, |
f24be42a | 362 | u32 *phb_index, u64 *capp_unit_id) |
f204e0b8 | 363 | { |
f24be42a | 364 | int rc; |
f204e0b8 IM |
365 | struct device_node *np; |
366 | const __be32 *prop; | |
f204e0b8 | 367 | |
6f963ec2 | 368 | if (!(np = pnv_pci_get_phb_node(dev))) |
f204e0b8 IM |
369 | return -ENODEV; |
370 | ||
371 | while (np && !(prop = of_get_property(np, "ibm,chip-id", NULL))) | |
372 | np = of_get_next_parent(np); | |
373 | if (!np) | |
374 | return -ENODEV; | |
f24be42a | 375 | |
6d382616 | 376 | *chipid = be32_to_cpup(prop); |
f24be42a CL |
377 | |
378 | rc = get_phb_index(np, phb_index); | |
379 | if (rc) { | |
380 | pr_err("cxl: invalid phb index\n"); | |
1d09697f | 381 | of_node_put(np); |
f24be42a CL |
382 | return rc; |
383 | } | |
384 | ||
385 | *capp_unit_id = get_capp_unit_id(np, *phb_index); | |
f204e0b8 | 386 | of_node_put(np); |
6d382616 | 387 | if (!*capp_unit_id) { |
40ac790d FB |
388 | pr_err("cxl: No capp unit found for PHB[%lld,%d]. Make sure the adapter is on a capi-compatible slot\n", |
389 | *chipid, *phb_index); | |
aa14138a PB |
390 | return -ENODEV; |
391 | } | |
f204e0b8 | 392 | |
6d382616 FB |
393 | return 0; |
394 | } | |
395 | ||
9dbcbfa1 PB |
396 | static DEFINE_MUTEX(indications_mutex); |
397 | ||
398 | static int get_phb_indications(struct pci_dev *dev, u64 *capiind, u64 *asnind, | |
399 | u64 *nbwind) | |
400 | { | |
401 | static u64 nbw, asn, capi = 0; | |
402 | struct device_node *np; | |
403 | const __be32 *prop; | |
404 | ||
405 | mutex_lock(&indications_mutex); | |
406 | if (!capi) { | |
407 | if (!(np = pnv_pci_get_phb_node(dev))) { | |
408 | mutex_unlock(&indications_mutex); | |
409 | return -ENODEV; | |
410 | } | |
411 | ||
412 | prop = of_get_property(np, "ibm,phb-indications", NULL); | |
413 | if (!prop) { | |
414 | nbw = 0x0300UL; /* legacy values */ | |
415 | asn = 0x0400UL; | |
416 | capi = 0x0200UL; | |
417 | } else { | |
418 | nbw = (u64)be32_to_cpu(prop[2]); | |
419 | asn = (u64)be32_to_cpu(prop[1]); | |
420 | capi = (u64)be32_to_cpu(prop[0]); | |
421 | } | |
422 | of_node_put(np); | |
423 | } | |
424 | *capiind = capi; | |
425 | *asnind = asn; | |
426 | *nbwind = nbw; | |
427 | mutex_unlock(&indications_mutex); | |
428 | return 0; | |
429 | } | |
430 | ||
431 | int cxl_get_xsl9_dsnctl(struct pci_dev *dev, u64 capp_unit_id, u64 *reg) | |
f24be42a | 432 | { |
3ced8d73 | 433 | u64 xsl_dsnctl; |
9dbcbfa1 | 434 | u64 capiind, asnind, nbwind; |
f24be42a CL |
435 | |
436 | /* | |
437 | * CAPI Identifier bits [0:7] | |
438 | * bit 61:60 MSI bits --> 0 | |
439 | * bit 59 TVT selector --> 0 | |
440 | */ | |
9dbcbfa1 PB |
441 | if (get_phb_indications(dev, &capiind, &asnind, &nbwind)) |
442 | return -ENODEV; | |
f24be42a CL |
443 | |
444 | /* | |
445 | * Tell XSL where to route data to. | |
446 | * The field chipid should match the PHB CAPI_CMPM register | |
447 | */ | |
9dbcbfa1 | 448 | xsl_dsnctl = (capiind << (63-15)); /* Bit 57 */ |
f24be42a CL |
449 | xsl_dsnctl |= (capp_unit_id << (63-15)); |
450 | ||
451 | /* nMMU_ID Defaults to: b’000001001’*/ | |
452 | xsl_dsnctl |= ((u64)0x09 << (63-28)); | |
453 | ||
2bf1071a NP |
454 | /* |
455 | * Used to identify CAPI packets which should be sorted into | |
456 | * the Non-Blocking queues by the PHB. This field should match | |
457 | * the PHB PBL_NBW_CMPM register | |
458 | * nbwind=0x03, bits [57:58], must include capi indicator. | |
459 | * Not supported on P9 DD1. | |
460 | */ | |
461 | xsl_dsnctl |= (nbwind << (63-55)); | |
462 | ||
463 | /* | |
464 | * Upper 16b address bits of ASB_Notify messages sent to the | |
465 | * system. Need to match the PHB’s ASN Compare/Mask Register. | |
466 | * Not supported on P9 DD1. | |
467 | */ | |
468 | xsl_dsnctl |= asnind; | |
f24be42a | 469 | |
3ced8d73 CL |
470 | *reg = xsl_dsnctl; |
471 | return 0; | |
472 | } | |
473 | ||
474 | static int init_implementation_adapter_regs_psl9(struct cxl *adapter, | |
475 | struct pci_dev *dev) | |
476 | { | |
477 | u64 xsl_dsnctl, psl_fircntl; | |
478 | u64 chipid; | |
479 | u32 phb_index; | |
480 | u64 capp_unit_id; | |
94322ed8 | 481 | u64 psl_debug; |
3ced8d73 CL |
482 | int rc; |
483 | ||
484 | rc = cxl_calc_capp_routing(dev, &chipid, &phb_index, &capp_unit_id); | |
485 | if (rc) | |
486 | return rc; | |
487 | ||
9dbcbfa1 | 488 | rc = cxl_get_xsl9_dsnctl(dev, capp_unit_id, &xsl_dsnctl); |
3ced8d73 CL |
489 | if (rc) |
490 | return rc; | |
491 | ||
f24be42a CL |
492 | cxl_p1_write(adapter, CXL_XSL9_DSNCTL, xsl_dsnctl); |
493 | ||
494 | /* Set fir_cntl to recommended value for production env */ | |
495 | psl_fircntl = (0x2ULL << (63-3)); /* ce_report */ | |
496 | psl_fircntl |= (0x1ULL << (63-6)); /* FIR_report */ | |
497 | psl_fircntl |= 0x1ULL; /* ce_thresh */ | |
498 | cxl_p1_write(adapter, CXL_PSL9_FIR_CNTL, psl_fircntl); | |
499 | ||
56328743 | 500 | /* Setup the PSL to transmit packets on the PCIe before the |
9a6d2022 | 501 | * CAPP is enabled. Make sure that CAPP virtual machines are disabled |
f24be42a | 502 | */ |
9a6d2022 | 503 | cxl_p1_write(adapter, CXL_PSL9_DSNDCTL, 0x0001001000012A10ULL); |
f24be42a CL |
504 | |
505 | /* | |
506 | * A response to an ASB_Notify request is returned by the | |
507 | * system as an MMIO write to the address defined in | |
56328743 CL |
508 | * the PSL_TNR_ADDR register. |
509 | * keep the Reset Value: 0x00020000E0000000 | |
f24be42a | 510 | */ |
f24be42a | 511 | |
56328743 CL |
512 | /* Enable XSL rty limit */ |
513 | cxl_p1_write(adapter, CXL_XSL9_DEF, 0x51F8000000000005ULL); | |
514 | ||
515 | /* Change XSL_INV dummy read threshold */ | |
516 | cxl_p1_write(adapter, CXL_XSL9_INV, 0x0000040007FFC200ULL); | |
517 | ||
518 | if (phb_index == 3) { | |
519 | /* disable machines 31-47 and 20-27 for DMA */ | |
520 | cxl_p1_write(adapter, CXL_PSL9_APCDEDTYPE, 0x40000FF3FFFF0000ULL); | |
521 | } | |
f24be42a | 522 | |
56328743 CL |
523 | /* Snoop machines */ |
524 | cxl_p1_write(adapter, CXL_PSL9_APCDEDALLOC, 0x800F000200000000ULL); | |
f24be42a | 525 | |
2bf1071a NP |
526 | /* Enable NORST and DD2 features */ |
527 | cxl_p1_write(adapter, CXL_PSL9_DEBUG, 0xC000000000000000ULL); | |
f24be42a | 528 | |
94322ed8 VJ |
529 | /* |
530 | * Check if PSL has data-cache. We need to flush adapter datacache | |
531 | * when as its about to be removed. | |
532 | */ | |
533 | psl_debug = cxl_p1_read(adapter, CXL_PSL9_DEBUG); | |
534 | if (psl_debug & CXL_PSL_DEBUG_CDC) { | |
535 | dev_dbg(&dev->dev, "No data-cache present\n"); | |
536 | adapter->native->no_data_cache = true; | |
537 | } | |
538 | ||
f24be42a CL |
539 | return 0; |
540 | } | |
541 | ||
64663f37 | 542 | static int init_implementation_adapter_regs_psl8(struct cxl *adapter, struct pci_dev *dev) |
6d382616 | 543 | { |
c6d2ee09 | 544 | u64 psl_dsnctl, psl_fircntl; |
6d382616 | 545 | u64 chipid; |
f24be42a | 546 | u32 phb_index; |
6d382616 FB |
547 | u64 capp_unit_id; |
548 | int rc; | |
549 | ||
3ced8d73 | 550 | rc = cxl_calc_capp_routing(dev, &chipid, &phb_index, &capp_unit_id); |
6d382616 FB |
551 | if (rc) |
552 | return rc; | |
553 | ||
4aec6ec0 FB |
554 | psl_dsnctl = 0x0000900000000000ULL; /* pteupd ttype, scdone */ |
555 | psl_dsnctl |= (0x2ULL << (63-38)); /* MMIO hang pulse: 256 us */ | |
f204e0b8 | 556 | /* Tell PSL where to route data to */ |
4aec6ec0 | 557 | psl_dsnctl |= (chipid << (63-5)); |
aa14138a PB |
558 | psl_dsnctl |= (capp_unit_id << (63-13)); |
559 | ||
f204e0b8 IM |
560 | cxl_p1_write(adapter, CXL_PSL_DSNDCTL, psl_dsnctl); |
561 | cxl_p1_write(adapter, CXL_PSL_RESLCKTO, 0x20000000200ULL); | |
562 | /* snoop write mask */ | |
563 | cxl_p1_write(adapter, CXL_PSL_SNWRALLOC, 0x00000000FFFFFFFFULL); | |
c6d2ee09 FB |
564 | /* set fir_cntl to recommended value for production env */ |
565 | psl_fircntl = (0x2ULL << (63-3)); /* ce_report */ | |
566 | psl_fircntl |= (0x1ULL << (63-6)); /* FIR_report */ | |
567 | psl_fircntl |= 0x1ULL; /* ce_thresh */ | |
568 | cxl_p1_write(adapter, CXL_PSL_FIR_CNTL, psl_fircntl); | |
f204e0b8 IM |
569 | /* for debugging with trace arrays */ |
570 | cxl_p1_write(adapter, CXL_PSL_TRACE, 0x0000FF7C00000000ULL); | |
571 | ||
572 | return 0; | |
573 | } | |
574 | ||
f3988ca4 | 575 | /* PSL */ |
6d382616 | 576 | #define TBSYNC_CAL(n) (((u64)n & 0x7) << (63-3)) |
390fd592 | 577 | #define TBSYNC_CNT(n) (((u64)n & 0x7) << (63-6)) |
6d382616 FB |
578 | /* For the PSL this is a multiple for 0 < n <= 7: */ |
579 | #define PSL_2048_250MHZ_CYCLES 1 | |
580 | ||
64663f37 | 581 | static void write_timebase_ctrl_psl8(struct cxl *adapter) |
6d382616 FB |
582 | { |
583 | cxl_p1_write(adapter, CXL_PSL_TB_CTLSTAT, | |
584 | TBSYNC_CNT(2 * PSL_2048_250MHZ_CYCLES)); | |
585 | } | |
586 | ||
f24be42a CL |
587 | static u64 timebase_read_psl9(struct cxl *adapter) |
588 | { | |
589 | return cxl_p1_read(adapter, CXL_PSL9_Timebase); | |
590 | } | |
591 | ||
64663f37 | 592 | static u64 timebase_read_psl8(struct cxl *adapter) |
6d382616 FB |
593 | { |
594 | return cxl_p1_read(adapter, CXL_PSL_Timebase); | |
595 | } | |
596 | ||
e009a7e8 | 597 | static void cxl_setup_psl_timebase(struct cxl *adapter, struct pci_dev *dev) |
390fd592 | 598 | { |
390fd592 PB |
599 | struct device_node *np; |
600 | ||
e009a7e8 FB |
601 | adapter->psl_timebase_synced = false; |
602 | ||
390fd592 | 603 | if (!(np = pnv_pci_get_phb_node(dev))) |
e009a7e8 | 604 | return; |
390fd592 PB |
605 | |
606 | /* Do not fail when CAPP timebase sync is not supported by OPAL */ | |
607 | of_node_get(np); | |
608 | if (! of_get_property(np, "ibm,capp-timebase-sync", NULL)) { | |
609 | of_node_put(np); | |
e009a7e8 FB |
610 | dev_info(&dev->dev, "PSL timebase inactive: OPAL support missing\n"); |
611 | return; | |
390fd592 PB |
612 | } |
613 | of_node_put(np); | |
614 | ||
615 | /* | |
616 | * Setup PSL Timebase Control and Status register | |
617 | * with the recommended Timebase Sync Count value | |
618 | */ | |
02b63b42 VJ |
619 | if (adapter->native->sl_ops->write_timebase_ctrl) |
620 | adapter->native->sl_ops->write_timebase_ctrl(adapter); | |
390fd592 PB |
621 | |
622 | /* Enable PSL Timebase */ | |
623 | cxl_p1_write(adapter, CXL_PSL_Control, 0x0000000000000000); | |
624 | cxl_p1_write(adapter, CXL_PSL_Control, CXL_PSL_Control_tb); | |
625 | ||
e009a7e8 | 626 | return; |
390fd592 PB |
627 | } |
628 | ||
f24be42a CL |
629 | static int init_implementation_afu_regs_psl9(struct cxl_afu *afu) |
630 | { | |
631 | return 0; | |
632 | } | |
633 | ||
64663f37 | 634 | static int init_implementation_afu_regs_psl8(struct cxl_afu *afu) |
f204e0b8 IM |
635 | { |
636 | /* read/write masks for this slice */ | |
637 | cxl_p1n_write(afu, CXL_PSL_APCALLOC_A, 0xFFFFFFFEFEFEFEFEULL); | |
638 | /* APC read/write masks for this slice */ | |
639 | cxl_p1n_write(afu, CXL_PSL_COALLOC_A, 0xFF000000FEFEFEFEULL); | |
640 | /* for debugging with trace arrays */ | |
641 | cxl_p1n_write(afu, CXL_PSL_SLICE_TRACE, 0x0000FFFF00000000ULL); | |
d6a6af2c | 642 | cxl_p1n_write(afu, CXL_PSL_RXCTL_A, CXL_PSL_RXCTL_AFUHP_4S); |
f204e0b8 IM |
643 | |
644 | return 0; | |
645 | } | |
646 | ||
2b04cf31 FB |
647 | int cxl_pci_setup_irq(struct cxl *adapter, unsigned int hwirq, |
648 | unsigned int virq) | |
f204e0b8 IM |
649 | { |
650 | struct pci_dev *dev = to_pci_dev(adapter->dev.parent); | |
651 | ||
652 | return pnv_cxl_ioda_msi_setup(dev, hwirq, virq); | |
653 | } | |
654 | ||
4beb5421 RG |
655 | int cxl_update_image_control(struct cxl *adapter) |
656 | { | |
657 | struct pci_dev *dev = to_pci_dev(adapter->dev.parent); | |
658 | int rc; | |
659 | int vsec; | |
660 | u8 image_state; | |
661 | ||
662 | if (!(vsec = find_cxl_vsec(dev))) { | |
663 | dev_err(&dev->dev, "ABORTING: CXL VSEC not found!\n"); | |
664 | return -ENODEV; | |
665 | } | |
666 | ||
667 | if ((rc = CXL_READ_VSEC_IMAGE_STATE(dev, vsec, &image_state))) { | |
668 | dev_err(&dev->dev, "failed to read image state: %i\n", rc); | |
669 | return rc; | |
670 | } | |
671 | ||
672 | if (adapter->perst_loads_image) | |
673 | image_state |= CXL_VSEC_PERST_LOADS_IMAGE; | |
674 | else | |
675 | image_state &= ~CXL_VSEC_PERST_LOADS_IMAGE; | |
676 | ||
677 | if (adapter->perst_select_user) | |
678 | image_state |= CXL_VSEC_PERST_SELECT_USER; | |
679 | else | |
680 | image_state &= ~CXL_VSEC_PERST_SELECT_USER; | |
681 | ||
682 | if ((rc = CXL_WRITE_VSEC_IMAGE_STATE(dev, vsec, image_state))) { | |
683 | dev_err(&dev->dev, "failed to update image control: %i\n", rc); | |
684 | return rc; | |
685 | } | |
686 | ||
687 | return 0; | |
688 | } | |
689 | ||
2b04cf31 | 690 | int cxl_pci_alloc_one_irq(struct cxl *adapter) |
f204e0b8 IM |
691 | { |
692 | struct pci_dev *dev = to_pci_dev(adapter->dev.parent); | |
693 | ||
694 | return pnv_cxl_alloc_hwirqs(dev, 1); | |
695 | } | |
696 | ||
2b04cf31 | 697 | void cxl_pci_release_one_irq(struct cxl *adapter, int hwirq) |
f204e0b8 IM |
698 | { |
699 | struct pci_dev *dev = to_pci_dev(adapter->dev.parent); | |
700 | ||
701 | return pnv_cxl_release_hwirqs(dev, hwirq, 1); | |
702 | } | |
703 | ||
2b04cf31 FB |
704 | int cxl_pci_alloc_irq_ranges(struct cxl_irq_ranges *irqs, |
705 | struct cxl *adapter, unsigned int num) | |
f204e0b8 IM |
706 | { |
707 | struct pci_dev *dev = to_pci_dev(adapter->dev.parent); | |
708 | ||
709 | return pnv_cxl_alloc_hwirq_ranges(irqs, dev, num); | |
710 | } | |
711 | ||
2b04cf31 FB |
712 | void cxl_pci_release_irq_ranges(struct cxl_irq_ranges *irqs, |
713 | struct cxl *adapter) | |
f204e0b8 IM |
714 | { |
715 | struct pci_dev *dev = to_pci_dev(adapter->dev.parent); | |
716 | ||
717 | pnv_cxl_release_hwirq_ranges(irqs, dev); | |
718 | } | |
719 | ||
720 | static int setup_cxl_bars(struct pci_dev *dev) | |
721 | { | |
722 | /* Safety check in case we get backported to < 3.17 without M64 */ | |
723 | if ((p1_base(dev) < 0x100000000ULL) || | |
724 | (p2_base(dev) < 0x100000000ULL)) { | |
725 | dev_err(&dev->dev, "ABORTING: M32 BAR assignment incompatible with CXL\n"); | |
726 | return -ENODEV; | |
727 | } | |
728 | ||
729 | /* | |
730 | * BAR 4/5 has a special meaning for CXL and must be programmed with a | |
731 | * special value corresponding to the CXL protocol address range. | |
f24be42a | 732 | * For POWER 8/9 that means bits 48:49 must be set to 10 |
f204e0b8 IM |
733 | */ |
734 | pci_write_config_dword(dev, PCI_BASE_ADDRESS_4, 0x00000000); | |
735 | pci_write_config_dword(dev, PCI_BASE_ADDRESS_5, 0x00020000); | |
736 | ||
737 | return 0; | |
738 | } | |
739 | ||
29fea8aa AS |
740 | /* pciex node: ibm,opal-m64-window = <0x3d058 0x0 0x3d058 0x0 0x8 0x0>; */ |
741 | static int switch_card_to_cxl(struct pci_dev *dev) | |
b0b5e591 | 742 | { |
29fea8aa | 743 | int vsec; |
f204e0b8 IM |
744 | u8 val; |
745 | int rc; | |
746 | ||
29fea8aa | 747 | dev_info(&dev->dev, "switch card to CXL\n"); |
b0b5e591 | 748 | |
29fea8aa AS |
749 | if (!(vsec = find_cxl_vsec(dev))) { |
750 | dev_err(&dev->dev, "ABORTING: CXL VSEC not found!\n"); | |
f204e0b8 IM |
751 | return -ENODEV; |
752 | } | |
753 | ||
29fea8aa AS |
754 | if ((rc = CXL_READ_VSEC_MODE_CONTROL(dev, vsec, &val))) { |
755 | dev_err(&dev->dev, "failed to read current mode control: %i", rc); | |
f204e0b8 IM |
756 | return rc; |
757 | } | |
29fea8aa AS |
758 | val &= ~CXL_VSEC_PROTOCOL_MASK; |
759 | val |= CXL_VSEC_PROTOCOL_256TB | CXL_VSEC_PROTOCOL_ENABLE; | |
760 | if ((rc = CXL_WRITE_VSEC_MODE_CONTROL(dev, vsec, val))) { | |
761 | dev_err(&dev->dev, "failed to enable CXL protocol: %i", rc); | |
762 | return rc; | |
b0b5e591 | 763 | } |
f204e0b8 | 764 | /* |
29fea8aa AS |
765 | * The CAIA spec (v0.12 11.6 Bi-modal Device Support) states |
766 | * we must wait 100ms after this mode switch before touching | |
767 | * PCIe config space. | |
f204e0b8 | 768 | */ |
29fea8aa | 769 | msleep(100); |
f204e0b8 IM |
770 | |
771 | return 0; | |
772 | } | |
773 | ||
2b04cf31 | 774 | static int pci_map_slice_regs(struct cxl_afu *afu, struct cxl *adapter, struct pci_dev *dev) |
f204e0b8 IM |
775 | { |
776 | u64 p1n_base, p2n_base, afu_desc; | |
777 | const u64 p1n_size = 0x100; | |
778 | const u64 p2n_size = 0x1000; | |
779 | ||
780 | p1n_base = p1_base(dev) + 0x10000 + (afu->slice * p1n_size); | |
781 | p2n_base = p2_base(dev) + (afu->slice * p2n_size); | |
cbffa3a5 CL |
782 | afu->psn_phys = p2_base(dev) + (adapter->native->ps_off + (afu->slice * adapter->ps_size)); |
783 | afu_desc = p2_base(dev) + adapter->native->afu_desc_off + (afu->slice * adapter->native->afu_desc_size); | |
f204e0b8 | 784 | |
cbffa3a5 | 785 | if (!(afu->native->p1n_mmio = ioremap(p1n_base, p1n_size))) |
f204e0b8 IM |
786 | goto err; |
787 | if (!(afu->p2n_mmio = ioremap(p2n_base, p2n_size))) | |
788 | goto err1; | |
789 | if (afu_desc) { | |
cbffa3a5 | 790 | if (!(afu->native->afu_desc_mmio = ioremap(afu_desc, adapter->native->afu_desc_size))) |
f204e0b8 IM |
791 | goto err2; |
792 | } | |
793 | ||
794 | return 0; | |
795 | err2: | |
796 | iounmap(afu->p2n_mmio); | |
797 | err1: | |
cbffa3a5 | 798 | iounmap(afu->native->p1n_mmio); |
f204e0b8 IM |
799 | err: |
800 | dev_err(&afu->dev, "Error mapping AFU MMIO regions\n"); | |
801 | return -ENOMEM; | |
802 | } | |
803 | ||
2b04cf31 | 804 | static void pci_unmap_slice_regs(struct cxl_afu *afu) |
f204e0b8 | 805 | { |
575e6986 | 806 | if (afu->p2n_mmio) { |
f204e0b8 | 807 | iounmap(afu->p2n_mmio); |
575e6986 DA |
808 | afu->p2n_mmio = NULL; |
809 | } | |
cbffa3a5 CL |
810 | if (afu->native->p1n_mmio) { |
811 | iounmap(afu->native->p1n_mmio); | |
812 | afu->native->p1n_mmio = NULL; | |
575e6986 | 813 | } |
cbffa3a5 CL |
814 | if (afu->native->afu_desc_mmio) { |
815 | iounmap(afu->native->afu_desc_mmio); | |
816 | afu->native->afu_desc_mmio = NULL; | |
575e6986 | 817 | } |
f204e0b8 IM |
818 | } |
819 | ||
2b04cf31 | 820 | void cxl_pci_release_afu(struct device *dev) |
f204e0b8 IM |
821 | { |
822 | struct cxl_afu *afu = to_cxl_afu(dev); | |
823 | ||
2b04cf31 | 824 | pr_devel("%s\n", __func__); |
f204e0b8 | 825 | |
bd664f89 | 826 | idr_destroy(&afu->contexts_idr); |
05155772 DA |
827 | cxl_release_spa(afu); |
828 | ||
cbffa3a5 | 829 | kfree(afu->native); |
f204e0b8 IM |
830 | kfree(afu); |
831 | } | |
832 | ||
f204e0b8 IM |
833 | /* Expects AFU struct to have recently been zeroed out */ |
834 | static int cxl_read_afu_descriptor(struct cxl_afu *afu) | |
835 | { | |
836 | u64 val; | |
837 | ||
838 | val = AFUD_READ_INFO(afu); | |
839 | afu->pp_irqs = AFUD_NUM_INTS_PER_PROC(val); | |
840 | afu->max_procs_virtualised = AFUD_NUM_PROCS(val); | |
b087e619 | 841 | afu->crs_num = AFUD_NUM_CRS(val); |
f204e0b8 IM |
842 | |
843 | if (AFUD_AFU_DIRECTED(val)) | |
844 | afu->modes_supported |= CXL_MODE_DIRECTED; | |
845 | if (AFUD_DEDICATED_PROCESS(val)) | |
846 | afu->modes_supported |= CXL_MODE_DEDICATED; | |
847 | if (AFUD_TIME_SLICED(val)) | |
848 | afu->modes_supported |= CXL_MODE_TIME_SLICED; | |
849 | ||
850 | val = AFUD_READ_PPPSA(afu); | |
851 | afu->pp_size = AFUD_PPPSA_LEN(val) * 4096; | |
852 | afu->psa = AFUD_PPPSA_PSA(val); | |
853 | if ((afu->pp_psa = AFUD_PPPSA_PP(val))) | |
cbffa3a5 | 854 | afu->native->pp_offset = AFUD_READ_PPPSA_OFF(afu); |
f204e0b8 | 855 | |
b087e619 IM |
856 | val = AFUD_READ_CR(afu); |
857 | afu->crs_len = AFUD_CR_LEN(val) * 256; | |
858 | afu->crs_offset = AFUD_READ_CR_OFF(afu); | |
859 | ||
e36f6fe1 VJ |
860 | |
861 | /* eb_len is in multiple of 4K */ | |
862 | afu->eb_len = AFUD_EB_LEN(AFUD_READ_EB(afu)) * 4096; | |
863 | afu->eb_offset = AFUD_READ_EB_OFF(afu); | |
864 | ||
865 | /* eb_off is 4K aligned so lower 12 bits are always zero */ | |
866 | if (EXTRACT_PPC_BITS(afu->eb_offset, 0, 11) != 0) { | |
867 | dev_warn(&afu->dev, | |
868 | "Invalid AFU error buffer offset %Lx\n", | |
869 | afu->eb_offset); | |
870 | dev_info(&afu->dev, | |
871 | "Ignoring AFU error buffer in the descriptor\n"); | |
872 | /* indicate that no afu buffer exists */ | |
873 | afu->eb_len = 0; | |
874 | } | |
875 | ||
f204e0b8 IM |
876 | return 0; |
877 | } | |
878 | ||
879 | static int cxl_afu_descriptor_looks_ok(struct cxl_afu *afu) | |
880 | { | |
5be587b1 FB |
881 | int i, rc; |
882 | u32 val; | |
3d5be039 | 883 | |
f204e0b8 | 884 | if (afu->psa && afu->adapter->ps_size < |
cbffa3a5 | 885 | (afu->native->pp_offset + afu->pp_size*afu->max_procs_virtualised)) { |
f204e0b8 IM |
886 | dev_err(&afu->dev, "per-process PSA can't fit inside the PSA!\n"); |
887 | return -ENODEV; | |
888 | } | |
889 | ||
890 | if (afu->pp_psa && (afu->pp_size < PAGE_SIZE)) | |
abd1d99b | 891 | dev_warn(&afu->dev, "AFU uses pp_size(%#016llx) < PAGE_SIZE per-process PSA!\n", afu->pp_size); |
f204e0b8 | 892 | |
3d5be039 | 893 | for (i = 0; i < afu->crs_num; i++) { |
5be587b1 FB |
894 | rc = cxl_ops->afu_cr_read32(afu, i, 0, &val); |
895 | if (rc || val == 0) { | |
3d5be039 IM |
896 | dev_err(&afu->dev, "ABORTING: AFU configuration record %i is invalid\n", i); |
897 | return -EINVAL; | |
898 | } | |
899 | } | |
49e9c99f IM |
900 | |
901 | if ((afu->modes_supported & ~CXL_MODE_DEDICATED) && afu->max_procs_virtualised == 0) { | |
902 | /* | |
903 | * We could also check this for the dedicated process model | |
904 | * since the architecture indicates it should be set to 1, but | |
905 | * in that case we ignore the value and I'd rather not risk | |
906 | * breaking any existing dedicated process AFUs that left it as | |
907 | * 0 (not that I'm aware of any). It is clearly an error for an | |
908 | * AFU directed AFU to set this to 0, and would have previously | |
909 | * triggered a bug resulting in the maximum not being enforced | |
910 | * at all since idr_alloc treats 0 as no maximum. | |
911 | */ | |
912 | dev_err(&afu->dev, "AFU does not support any processes\n"); | |
913 | return -EINVAL; | |
914 | } | |
3d5be039 | 915 | |
f204e0b8 IM |
916 | return 0; |
917 | } | |
918 | ||
f24be42a CL |
919 | static int sanitise_afu_regs_psl9(struct cxl_afu *afu) |
920 | { | |
921 | u64 reg; | |
922 | ||
923 | /* | |
924 | * Clear out any regs that contain either an IVTE or address or may be | |
925 | * waiting on an acknowledgment to try to be a bit safer as we bring | |
926 | * it online | |
927 | */ | |
928 | reg = cxl_p2n_read(afu, CXL_AFU_Cntl_An); | |
929 | if ((reg & CXL_AFU_Cntl_An_ES_MASK) != CXL_AFU_Cntl_An_ES_Disabled) { | |
930 | dev_warn(&afu->dev, "WARNING: AFU was not disabled: %#016llx\n", reg); | |
931 | if (cxl_ops->afu_reset(afu)) | |
932 | return -EIO; | |
933 | if (cxl_afu_disable(afu)) | |
934 | return -EIO; | |
935 | if (cxl_psl_purge(afu)) | |
936 | return -EIO; | |
937 | } | |
938 | cxl_p1n_write(afu, CXL_PSL_SPAP_An, 0x0000000000000000); | |
939 | cxl_p1n_write(afu, CXL_PSL_AMBAR_An, 0x0000000000000000); | |
940 | reg = cxl_p2n_read(afu, CXL_PSL_DSISR_An); | |
941 | if (reg) { | |
942 | dev_warn(&afu->dev, "AFU had pending DSISR: %#016llx\n", reg); | |
943 | if (reg & CXL_PSL9_DSISR_An_TF) | |
944 | cxl_p2n_write(afu, CXL_PSL_TFC_An, CXL_PSL_TFC_An_AE); | |
945 | else | |
946 | cxl_p2n_write(afu, CXL_PSL_TFC_An, CXL_PSL_TFC_An_A); | |
947 | } | |
948 | if (afu->adapter->native->sl_ops->register_serr_irq) { | |
949 | reg = cxl_p1n_read(afu, CXL_PSL_SERR_An); | |
950 | if (reg) { | |
951 | if (reg & ~0x000000007fffffff) | |
952 | dev_warn(&afu->dev, "AFU had pending SERR: %#016llx\n", reg); | |
953 | cxl_p1n_write(afu, CXL_PSL_SERR_An, reg & ~0xffff); | |
954 | } | |
955 | } | |
956 | reg = cxl_p2n_read(afu, CXL_PSL_ErrStat_An); | |
957 | if (reg) { | |
958 | dev_warn(&afu->dev, "AFU had pending error status: %#016llx\n", reg); | |
959 | cxl_p2n_write(afu, CXL_PSL_ErrStat_An, reg); | |
960 | } | |
961 | ||
962 | return 0; | |
963 | } | |
964 | ||
64663f37 | 965 | static int sanitise_afu_regs_psl8(struct cxl_afu *afu) |
f204e0b8 IM |
966 | { |
967 | u64 reg; | |
968 | ||
969 | /* | |
970 | * Clear out any regs that contain either an IVTE or address or may be | |
971 | * waiting on an acknowledgement to try to be a bit safer as we bring | |
972 | * it online | |
973 | */ | |
974 | reg = cxl_p2n_read(afu, CXL_AFU_Cntl_An); | |
975 | if ((reg & CXL_AFU_Cntl_An_ES_MASK) != CXL_AFU_Cntl_An_ES_Disabled) { | |
de369538 | 976 | dev_warn(&afu->dev, "WARNING: AFU was not disabled: %#016llx\n", reg); |
5be587b1 | 977 | if (cxl_ops->afu_reset(afu)) |
f204e0b8 IM |
978 | return -EIO; |
979 | if (cxl_afu_disable(afu)) | |
980 | return -EIO; | |
981 | if (cxl_psl_purge(afu)) | |
982 | return -EIO; | |
983 | } | |
984 | cxl_p1n_write(afu, CXL_PSL_SPAP_An, 0x0000000000000000); | |
985 | cxl_p1n_write(afu, CXL_PSL_IVTE_Limit_An, 0x0000000000000000); | |
986 | cxl_p1n_write(afu, CXL_PSL_IVTE_Offset_An, 0x0000000000000000); | |
987 | cxl_p1n_write(afu, CXL_PSL_AMBAR_An, 0x0000000000000000); | |
988 | cxl_p1n_write(afu, CXL_PSL_SPOffset_An, 0x0000000000000000); | |
989 | cxl_p1n_write(afu, CXL_HAURP_An, 0x0000000000000000); | |
990 | cxl_p2n_write(afu, CXL_CSRP_An, 0x0000000000000000); | |
991 | cxl_p2n_write(afu, CXL_AURP1_An, 0x0000000000000000); | |
992 | cxl_p2n_write(afu, CXL_AURP0_An, 0x0000000000000000); | |
993 | cxl_p2n_write(afu, CXL_SSTP1_An, 0x0000000000000000); | |
994 | cxl_p2n_write(afu, CXL_SSTP0_An, 0x0000000000000000); | |
995 | reg = cxl_p2n_read(afu, CXL_PSL_DSISR_An); | |
996 | if (reg) { | |
de369538 | 997 | dev_warn(&afu->dev, "AFU had pending DSISR: %#016llx\n", reg); |
f204e0b8 IM |
998 | if (reg & CXL_PSL_DSISR_TRANS) |
999 | cxl_p2n_write(afu, CXL_PSL_TFC_An, CXL_PSL_TFC_An_AE); | |
1000 | else | |
1001 | cxl_p2n_write(afu, CXL_PSL_TFC_An, CXL_PSL_TFC_An_A); | |
1002 | } | |
6d382616 FB |
1003 | if (afu->adapter->native->sl_ops->register_serr_irq) { |
1004 | reg = cxl_p1n_read(afu, CXL_PSL_SERR_An); | |
1005 | if (reg) { | |
1006 | if (reg & ~0xffff) | |
1007 | dev_warn(&afu->dev, "AFU had pending SERR: %#016llx\n", reg); | |
1008 | cxl_p1n_write(afu, CXL_PSL_SERR_An, reg & ~0xffff); | |
1009 | } | |
f204e0b8 IM |
1010 | } |
1011 | reg = cxl_p2n_read(afu, CXL_PSL_ErrStat_An); | |
1012 | if (reg) { | |
de369538 | 1013 | dev_warn(&afu->dev, "AFU had pending error status: %#016llx\n", reg); |
f204e0b8 IM |
1014 | cxl_p2n_write(afu, CXL_PSL_ErrStat_An, reg); |
1015 | } | |
1016 | ||
1017 | return 0; | |
1018 | } | |
1019 | ||
e36f6fe1 VJ |
1020 | #define ERR_BUFF_MAX_COPY_SIZE PAGE_SIZE |
1021 | /* | |
1022 | * afu_eb_read: | |
1023 | * Called from sysfs and reads the afu error info buffer. The h/w only supports | |
1024 | * 4/8 bytes aligned access. So in case the requested offset/count arent 8 byte | |
1025 | * aligned the function uses a bounce buffer which can be max PAGE_SIZE. | |
1026 | */ | |
2b04cf31 | 1027 | ssize_t cxl_pci_afu_read_err_buffer(struct cxl_afu *afu, char *buf, |
e36f6fe1 VJ |
1028 | loff_t off, size_t count) |
1029 | { | |
1030 | loff_t aligned_start, aligned_end; | |
1031 | size_t aligned_length; | |
1032 | void *tbuf; | |
cbffa3a5 | 1033 | const void __iomem *ebuf = afu->native->afu_desc_mmio + afu->eb_offset; |
e36f6fe1 VJ |
1034 | |
1035 | if (count == 0 || off < 0 || (size_t)off >= afu->eb_len) | |
1036 | return 0; | |
1037 | ||
1038 | /* calculate aligned read window */ | |
1039 | count = min((size_t)(afu->eb_len - off), count); | |
1040 | aligned_start = round_down(off, 8); | |
1041 | aligned_end = round_up(off + count, 8); | |
1042 | aligned_length = aligned_end - aligned_start; | |
1043 | ||
1044 | /* max we can copy in one read is PAGE_SIZE */ | |
1045 | if (aligned_length > ERR_BUFF_MAX_COPY_SIZE) { | |
1046 | aligned_length = ERR_BUFF_MAX_COPY_SIZE; | |
1047 | count = ERR_BUFF_MAX_COPY_SIZE - (off & 0x7); | |
1048 | } | |
1049 | ||
1050 | /* use bounce buffer for copy */ | |
0ee931c4 | 1051 | tbuf = (void *)__get_free_page(GFP_KERNEL); |
e36f6fe1 VJ |
1052 | if (!tbuf) |
1053 | return -ENOMEM; | |
1054 | ||
1055 | /* perform aligned read from the mmio region */ | |
1056 | memcpy_fromio(tbuf, ebuf + aligned_start, aligned_length); | |
1057 | memcpy(buf, tbuf + (off & 0x7), count); | |
1058 | ||
1059 | free_page((unsigned long)tbuf); | |
1060 | ||
1061 | return count; | |
1062 | } | |
1063 | ||
2b04cf31 | 1064 | static int pci_configure_afu(struct cxl_afu *afu, struct cxl *adapter, struct pci_dev *dev) |
f204e0b8 | 1065 | { |
f204e0b8 IM |
1066 | int rc; |
1067 | ||
2b04cf31 | 1068 | if ((rc = pci_map_slice_regs(afu, adapter, dev))) |
d76427b0 | 1069 | return rc; |
f204e0b8 | 1070 | |
bdd2e715 CL |
1071 | if (adapter->native->sl_ops->sanitise_afu_regs) { |
1072 | rc = adapter->native->sl_ops->sanitise_afu_regs(afu); | |
1073 | if (rc) | |
1074 | goto err1; | |
1075 | } | |
f204e0b8 IM |
1076 | |
1077 | /* We need to reset the AFU before we can read the AFU descriptor */ | |
5be587b1 | 1078 | if ((rc = cxl_ops->afu_reset(afu))) |
d76427b0 | 1079 | goto err1; |
f204e0b8 IM |
1080 | |
1081 | if (cxl_verbose) | |
1082 | dump_afu_descriptor(afu); | |
1083 | ||
1084 | if ((rc = cxl_read_afu_descriptor(afu))) | |
d76427b0 | 1085 | goto err1; |
f204e0b8 IM |
1086 | |
1087 | if ((rc = cxl_afu_descriptor_looks_ok(afu))) | |
d76427b0 | 1088 | goto err1; |
f204e0b8 | 1089 | |
6d382616 FB |
1090 | if (adapter->native->sl_ops->afu_regs_init) |
1091 | if ((rc = adapter->native->sl_ops->afu_regs_init(afu))) | |
1092 | goto err1; | |
f204e0b8 | 1093 | |
6d382616 FB |
1094 | if (adapter->native->sl_ops->register_serr_irq) |
1095 | if ((rc = adapter->native->sl_ops->register_serr_irq(afu))) | |
1096 | goto err1; | |
f204e0b8 | 1097 | |
2b04cf31 | 1098 | if ((rc = cxl_native_register_psl_irq(afu))) |
d76427b0 DA |
1099 | goto err2; |
1100 | ||
171ed0fc | 1101 | atomic_set(&afu->configured_state, 0); |
d76427b0 DA |
1102 | return 0; |
1103 | ||
1104 | err2: | |
6d382616 FB |
1105 | if (adapter->native->sl_ops->release_serr_irq) |
1106 | adapter->native->sl_ops->release_serr_irq(afu); | |
d76427b0 | 1107 | err1: |
2b04cf31 | 1108 | pci_unmap_slice_regs(afu); |
d76427b0 DA |
1109 | return rc; |
1110 | } | |
1111 | ||
2b04cf31 | 1112 | static void pci_deconfigure_afu(struct cxl_afu *afu) |
d76427b0 | 1113 | { |
171ed0fc AD |
1114 | /* |
1115 | * It's okay to deconfigure when AFU is already locked, otherwise wait | |
1116 | * until there are no readers | |
1117 | */ | |
1118 | if (atomic_read(&afu->configured_state) != -1) { | |
1119 | while (atomic_cmpxchg(&afu->configured_state, 0, -1) != -1) | |
1120 | schedule(); | |
1121 | } | |
2b04cf31 | 1122 | cxl_native_release_psl_irq(afu); |
6d382616 FB |
1123 | if (afu->adapter->native->sl_ops->release_serr_irq) |
1124 | afu->adapter->native->sl_ops->release_serr_irq(afu); | |
2b04cf31 | 1125 | pci_unmap_slice_regs(afu); |
d76427b0 DA |
1126 | } |
1127 | ||
2b04cf31 | 1128 | static int pci_init_afu(struct cxl *adapter, int slice, struct pci_dev *dev) |
d76427b0 DA |
1129 | { |
1130 | struct cxl_afu *afu; | |
cbffa3a5 | 1131 | int rc = -ENOMEM; |
d76427b0 DA |
1132 | |
1133 | afu = cxl_alloc_afu(adapter, slice); | |
1134 | if (!afu) | |
1135 | return -ENOMEM; | |
1136 | ||
cbffa3a5 CL |
1137 | afu->native = kzalloc(sizeof(struct cxl_afu_native), GFP_KERNEL); |
1138 | if (!afu->native) | |
1139 | goto err_free_afu; | |
1140 | ||
1141 | mutex_init(&afu->native->spa_mutex); | |
1142 | ||
d76427b0 DA |
1143 | rc = dev_set_name(&afu->dev, "afu%i.%i", adapter->adapter_num, slice); |
1144 | if (rc) | |
cbffa3a5 | 1145 | goto err_free_native; |
d76427b0 | 1146 | |
2b04cf31 | 1147 | rc = pci_configure_afu(afu, adapter, dev); |
d76427b0 | 1148 | if (rc) |
cbffa3a5 | 1149 | goto err_free_native; |
f204e0b8 IM |
1150 | |
1151 | /* Don't care if this fails */ | |
1152 | cxl_debugfs_afu_add(afu); | |
1153 | ||
1154 | /* | |
1155 | * After we call this function we must not free the afu directly, even | |
1156 | * if it returns an error! | |
1157 | */ | |
1158 | if ((rc = cxl_register_afu(afu))) | |
8bf03f55 | 1159 | goto err_put_dev; |
f204e0b8 IM |
1160 | |
1161 | if ((rc = cxl_sysfs_afu_add(afu))) | |
8bf03f55 | 1162 | goto err_del_dev; |
f204e0b8 | 1163 | |
f204e0b8 IM |
1164 | adapter->afu[afu->slice] = afu; |
1165 | ||
6f7f0b3d MN |
1166 | if ((rc = cxl_pci_vphb_add(afu))) |
1167 | dev_info(&afu->dev, "Can't register vPHB\n"); | |
1168 | ||
f204e0b8 IM |
1169 | return 0; |
1170 | ||
8bf03f55 YY |
1171 | err_del_dev: |
1172 | device_del(&afu->dev); | |
1173 | err_put_dev: | |
2b04cf31 | 1174 | pci_deconfigure_afu(afu); |
f204e0b8 | 1175 | cxl_debugfs_afu_remove(afu); |
8bf03f55 | 1176 | put_device(&afu->dev); |
f204e0b8 | 1177 | return rc; |
d76427b0 | 1178 | |
cbffa3a5 CL |
1179 | err_free_native: |
1180 | kfree(afu->native); | |
1181 | err_free_afu: | |
d76427b0 DA |
1182 | kfree(afu); |
1183 | return rc; | |
1184 | ||
f204e0b8 IM |
1185 | } |
1186 | ||
2b04cf31 | 1187 | static void cxl_pci_remove_afu(struct cxl_afu *afu) |
f204e0b8 | 1188 | { |
2b04cf31 | 1189 | pr_devel("%s\n", __func__); |
f204e0b8 IM |
1190 | |
1191 | if (!afu) | |
1192 | return; | |
1193 | ||
d601ea91 | 1194 | cxl_pci_vphb_remove(afu); |
f204e0b8 IM |
1195 | cxl_sysfs_afu_remove(afu); |
1196 | cxl_debugfs_afu_remove(afu); | |
1197 | ||
1198 | spin_lock(&afu->adapter->afu_list_lock); | |
1199 | afu->adapter->afu[afu->slice] = NULL; | |
1200 | spin_unlock(&afu->adapter->afu_list_lock); | |
1201 | ||
1202 | cxl_context_detach_all(afu); | |
5be587b1 | 1203 | cxl_ops->afu_deactivate_mode(afu, afu->current_mode); |
f204e0b8 | 1204 | |
2b04cf31 | 1205 | pci_deconfigure_afu(afu); |
f204e0b8 IM |
1206 | device_unregister(&afu->dev); |
1207 | } | |
1208 | ||
2b04cf31 | 1209 | int cxl_pci_reset(struct cxl *adapter) |
62fa19d4 RG |
1210 | { |
1211 | struct pci_dev *dev = to_pci_dev(adapter->dev.parent); | |
1212 | int rc; | |
62fa19d4 | 1213 | |
13e68d8b DA |
1214 | if (adapter->perst_same_image) { |
1215 | dev_warn(&dev->dev, | |
1216 | "cxl: refusing to reset/reflash when perst_reloads_same_image is set.\n"); | |
1217 | return -EINVAL; | |
1218 | } | |
1219 | ||
62fa19d4 | 1220 | dev_info(&dev->dev, "CXL reset\n"); |
aaa2245e | 1221 | |
abd1d99b CL |
1222 | /* |
1223 | * The adapter is about to be reset, so ignore errors. | |
abd1d99b | 1224 | */ |
94322ed8 | 1225 | cxl_data_cache_flush(adapter); |
62fa19d4 | 1226 | |
62fa19d4 RG |
1227 | /* pcie_warm_reset requests a fundamental pci reset which includes a |
1228 | * PERST assert/deassert. PERST triggers a loading of the image | |
1229 | * if "user" or "factory" is selected in sysfs */ | |
1230 | if ((rc = pci_set_pcie_reset_state(dev, pcie_warm_reset))) { | |
1231 | dev_err(&dev->dev, "cxl: pcie_warm_reset failed\n"); | |
1232 | return rc; | |
1233 | } | |
1234 | ||
62fa19d4 RG |
1235 | return rc; |
1236 | } | |
f204e0b8 IM |
1237 | |
1238 | static int cxl_map_adapter_regs(struct cxl *adapter, struct pci_dev *dev) | |
1239 | { | |
1240 | if (pci_request_region(dev, 2, "priv 2 regs")) | |
1241 | goto err1; | |
1242 | if (pci_request_region(dev, 0, "priv 1 regs")) | |
1243 | goto err2; | |
1244 | ||
de369538 | 1245 | pr_devel("cxl_map_adapter_regs: p1: %#016llx %#llx, p2: %#016llx %#llx", |
f204e0b8 IM |
1246 | p1_base(dev), p1_size(dev), p2_base(dev), p2_size(dev)); |
1247 | ||
cbffa3a5 | 1248 | if (!(adapter->native->p1_mmio = ioremap(p1_base(dev), p1_size(dev)))) |
f204e0b8 IM |
1249 | goto err3; |
1250 | ||
cbffa3a5 | 1251 | if (!(adapter->native->p2_mmio = ioremap(p2_base(dev), p2_size(dev)))) |
f204e0b8 IM |
1252 | goto err4; |
1253 | ||
1254 | return 0; | |
1255 | ||
1256 | err4: | |
cbffa3a5 CL |
1257 | iounmap(adapter->native->p1_mmio); |
1258 | adapter->native->p1_mmio = NULL; | |
f204e0b8 IM |
1259 | err3: |
1260 | pci_release_region(dev, 0); | |
1261 | err2: | |
1262 | pci_release_region(dev, 2); | |
1263 | err1: | |
1264 | return -ENOMEM; | |
1265 | } | |
1266 | ||
1267 | static void cxl_unmap_adapter_regs(struct cxl *adapter) | |
1268 | { | |
cbffa3a5 CL |
1269 | if (adapter->native->p1_mmio) { |
1270 | iounmap(adapter->native->p1_mmio); | |
1271 | adapter->native->p1_mmio = NULL; | |
575e6986 DA |
1272 | pci_release_region(to_pci_dev(adapter->dev.parent), 2); |
1273 | } | |
cbffa3a5 CL |
1274 | if (adapter->native->p2_mmio) { |
1275 | iounmap(adapter->native->p2_mmio); | |
1276 | adapter->native->p2_mmio = NULL; | |
575e6986 DA |
1277 | pci_release_region(to_pci_dev(adapter->dev.parent), 0); |
1278 | } | |
f204e0b8 IM |
1279 | } |
1280 | ||
1281 | static int cxl_read_vsec(struct cxl *adapter, struct pci_dev *dev) | |
1282 | { | |
1283 | int vsec; | |
1284 | u32 afu_desc_off, afu_desc_size; | |
1285 | u32 ps_off, ps_size; | |
1286 | u16 vseclen; | |
1287 | u8 image_state; | |
1288 | ||
1289 | if (!(vsec = find_cxl_vsec(dev))) { | |
bee30c70 | 1290 | dev_err(&dev->dev, "ABORTING: CXL VSEC not found!\n"); |
f204e0b8 IM |
1291 | return -ENODEV; |
1292 | } | |
1293 | ||
1294 | CXL_READ_VSEC_LENGTH(dev, vsec, &vseclen); | |
1295 | if (vseclen < CXL_VSEC_MIN_SIZE) { | |
bee30c70 | 1296 | dev_err(&dev->dev, "ABORTING: CXL VSEC too short\n"); |
f204e0b8 IM |
1297 | return -EINVAL; |
1298 | } | |
1299 | ||
1300 | CXL_READ_VSEC_STATUS(dev, vsec, &adapter->vsec_status); | |
1301 | CXL_READ_VSEC_PSL_REVISION(dev, vsec, &adapter->psl_rev); | |
1302 | CXL_READ_VSEC_CAIA_MAJOR(dev, vsec, &adapter->caia_major); | |
1303 | CXL_READ_VSEC_CAIA_MINOR(dev, vsec, &adapter->caia_minor); | |
1304 | CXL_READ_VSEC_BASE_IMAGE(dev, vsec, &adapter->base_image); | |
1305 | CXL_READ_VSEC_IMAGE_STATE(dev, vsec, &image_state); | |
1306 | adapter->user_image_loaded = !!(image_state & CXL_VSEC_USER_IMAGE_LOADED); | |
4beb5421 | 1307 | adapter->perst_select_user = !!(image_state & CXL_VSEC_USER_IMAGE_LOADED); |
aba81433 | 1308 | adapter->perst_loads_image = !!(image_state & CXL_VSEC_PERST_LOADS_IMAGE); |
f204e0b8 IM |
1309 | |
1310 | CXL_READ_VSEC_NAFUS(dev, vsec, &adapter->slices); | |
1311 | CXL_READ_VSEC_AFU_DESC_OFF(dev, vsec, &afu_desc_off); | |
1312 | CXL_READ_VSEC_AFU_DESC_SIZE(dev, vsec, &afu_desc_size); | |
1313 | CXL_READ_VSEC_PS_OFF(dev, vsec, &ps_off); | |
1314 | CXL_READ_VSEC_PS_SIZE(dev, vsec, &ps_size); | |
1315 | ||
1316 | /* Convert everything to bytes, because there is NO WAY I'd look at the | |
1317 | * code a month later and forget what units these are in ;-) */ | |
cbffa3a5 | 1318 | adapter->native->ps_off = ps_off * 64 * 1024; |
f204e0b8 | 1319 | adapter->ps_size = ps_size * 64 * 1024; |
cbffa3a5 CL |
1320 | adapter->native->afu_desc_off = afu_desc_off * 64 * 1024; |
1321 | adapter->native->afu_desc_size = afu_desc_size * 64 * 1024; | |
f204e0b8 IM |
1322 | |
1323 | /* Total IRQs - 1 PSL ERROR - #AFU*(1 slice error + 1 DSI) */ | |
1324 | adapter->user_irqs = pnv_cxl_get_irq_count(dev) - 1 - 2*adapter->slices; | |
1325 | ||
1326 | return 0; | |
1327 | } | |
1328 | ||
d79e6801 PB |
1329 | /* |
1330 | * Workaround a PCIe Host Bridge defect on some cards, that can cause | |
1331 | * malformed Transaction Layer Packet (TLP) errors to be erroneously | |
1332 | * reported. Mask this error in the Uncorrectable Error Mask Register. | |
1333 | * | |
1334 | * The upper nibble of the PSL revision is used to distinguish between | |
1335 | * different cards. The affected ones have it set to 0. | |
1336 | */ | |
1337 | static void cxl_fixup_malformed_tlp(struct cxl *adapter, struct pci_dev *dev) | |
1338 | { | |
1339 | int aer; | |
1340 | u32 data; | |
1341 | ||
1342 | if (adapter->psl_rev & 0xf000) | |
1343 | return; | |
1344 | if (!(aer = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR))) | |
1345 | return; | |
1346 | pci_read_config_dword(dev, aer + PCI_ERR_UNCOR_MASK, &data); | |
1347 | if (data & PCI_ERR_UNC_MALF_TLP) | |
1348 | if (data & PCI_ERR_UNC_INTN) | |
1349 | return; | |
1350 | data |= PCI_ERR_UNC_MALF_TLP; | |
1351 | data |= PCI_ERR_UNC_INTN; | |
1352 | pci_write_config_dword(dev, aer + PCI_ERR_UNCOR_MASK, data); | |
1353 | } | |
1354 | ||
abd1d99b CL |
1355 | static bool cxl_compatible_caia_version(struct cxl *adapter) |
1356 | { | |
1357 | if (cxl_is_power8() && (adapter->caia_major == 1)) | |
1358 | return true; | |
1359 | ||
f24be42a CL |
1360 | if (cxl_is_power9() && (adapter->caia_major == 2)) |
1361 | return true; | |
1362 | ||
abd1d99b CL |
1363 | return false; |
1364 | } | |
1365 | ||
f204e0b8 IM |
1366 | static int cxl_vsec_looks_ok(struct cxl *adapter, struct pci_dev *dev) |
1367 | { | |
1368 | if (adapter->vsec_status & CXL_STATUS_SECOND_PORT) | |
1369 | return -EBUSY; | |
1370 | ||
1371 | if (adapter->vsec_status & CXL_UNSUPPORTED_FEATURES) { | |
bee30c70 | 1372 | dev_err(&dev->dev, "ABORTING: CXL requires unsupported features\n"); |
f204e0b8 IM |
1373 | return -EINVAL; |
1374 | } | |
1375 | ||
abd1d99b CL |
1376 | if (!cxl_compatible_caia_version(adapter)) { |
1377 | dev_info(&dev->dev, "Ignoring card. PSL type is not supported (caia version: %d)\n", | |
1378 | adapter->caia_major); | |
1379 | return -ENODEV; | |
1380 | } | |
1381 | ||
f204e0b8 IM |
1382 | if (!adapter->slices) { |
1383 | /* Once we support dynamic reprogramming we can use the card if | |
1384 | * it supports loadable AFUs */ | |
bee30c70 | 1385 | dev_err(&dev->dev, "ABORTING: Device has no AFUs\n"); |
f204e0b8 IM |
1386 | return -EINVAL; |
1387 | } | |
1388 | ||
cbffa3a5 | 1389 | if (!adapter->native->afu_desc_off || !adapter->native->afu_desc_size) { |
bee30c70 | 1390 | dev_err(&dev->dev, "ABORTING: VSEC shows no AFU descriptors\n"); |
f204e0b8 IM |
1391 | return -EINVAL; |
1392 | } | |
1393 | ||
cbffa3a5 | 1394 | if (adapter->ps_size > p2_size(dev) - adapter->native->ps_off) { |
bee30c70 | 1395 | dev_err(&dev->dev, "ABORTING: Problem state size larger than " |
f204e0b8 | 1396 | "available in BAR2: 0x%llx > 0x%llx\n", |
cbffa3a5 | 1397 | adapter->ps_size, p2_size(dev) - adapter->native->ps_off); |
f204e0b8 IM |
1398 | return -EINVAL; |
1399 | } | |
1400 | ||
1401 | return 0; | |
1402 | } | |
1403 | ||
d601ea91 FB |
1404 | ssize_t cxl_pci_read_adapter_vpd(struct cxl *adapter, void *buf, size_t len) |
1405 | { | |
1406 | return pci_read_vpd(to_pci_dev(adapter->dev.parent), 0, len, buf); | |
1407 | } | |
1408 | ||
f204e0b8 IM |
1409 | static void cxl_release_adapter(struct device *dev) |
1410 | { | |
1411 | struct cxl *adapter = to_cxl_adapter(dev); | |
1412 | ||
1413 | pr_devel("cxl_release_adapter\n"); | |
1414 | ||
c044c415 DA |
1415 | cxl_remove_adapter_nr(adapter); |
1416 | ||
cbffa3a5 | 1417 | kfree(adapter->native); |
f204e0b8 IM |
1418 | kfree(adapter); |
1419 | } | |
1420 | ||
390fd592 PB |
1421 | #define CXL_PSL_ErrIVTE_tberror (0x1ull << (63-31)) |
1422 | ||
f204e0b8 IM |
1423 | static int sanitise_adapter_regs(struct cxl *adapter) |
1424 | { | |
bdd2e715 CL |
1425 | int rc = 0; |
1426 | ||
390fd592 PB |
1427 | /* Clear PSL tberror bit by writing 1 to it */ |
1428 | cxl_p1_write(adapter, CXL_PSL_ErrIVTE, CXL_PSL_ErrIVTE_tberror); | |
bdd2e715 | 1429 | |
f24be42a CL |
1430 | if (adapter->native->sl_ops->invalidate_all) { |
1431 | /* do not invalidate ERAT entries when not reloading on PERST */ | |
1432 | if (cxl_is_power9() && (adapter->perst_loads_image)) | |
1433 | return 0; | |
bdd2e715 | 1434 | rc = adapter->native->sl_ops->invalidate_all(adapter); |
f24be42a | 1435 | } |
bdd2e715 CL |
1436 | |
1437 | return rc; | |
f204e0b8 IM |
1438 | } |
1439 | ||
c044c415 DA |
1440 | /* This should contain *only* operations that can safely be done in |
1441 | * both creation and recovery. | |
1442 | */ | |
1443 | static int cxl_configure_adapter(struct cxl *adapter, struct pci_dev *dev) | |
f204e0b8 | 1444 | { |
f204e0b8 IM |
1445 | int rc; |
1446 | ||
c044c415 DA |
1447 | adapter->dev.parent = &dev->dev; |
1448 | adapter->dev.release = cxl_release_adapter; | |
1449 | pci_set_drvdata(dev, adapter); | |
f204e0b8 | 1450 | |
c044c415 DA |
1451 | rc = pci_enable_device(dev); |
1452 | if (rc) { | |
1453 | dev_err(&dev->dev, "pci_enable_device failed: %i\n", rc); | |
1454 | return rc; | |
1455 | } | |
f204e0b8 | 1456 | |
bee30c70 | 1457 | if ((rc = cxl_read_vsec(adapter, dev))) |
c044c415 | 1458 | return rc; |
bee30c70 IM |
1459 | |
1460 | if ((rc = cxl_vsec_looks_ok(adapter, dev))) | |
c044c415 | 1461 | return rc; |
bee30c70 | 1462 | |
d79e6801 PB |
1463 | cxl_fixup_malformed_tlp(adapter, dev); |
1464 | ||
bee30c70 | 1465 | if ((rc = setup_cxl_bars(dev))) |
c044c415 | 1466 | return rc; |
bee30c70 | 1467 | |
29fea8aa | 1468 | if ((rc = switch_card_to_cxl(dev))) |
c044c415 | 1469 | return rc; |
f204e0b8 | 1470 | |
4beb5421 | 1471 | if ((rc = cxl_update_image_control(adapter))) |
c044c415 | 1472 | return rc; |
4beb5421 | 1473 | |
f204e0b8 | 1474 | if ((rc = cxl_map_adapter_regs(adapter, dev))) |
c044c415 | 1475 | return rc; |
f204e0b8 IM |
1476 | |
1477 | if ((rc = sanitise_adapter_regs(adapter))) | |
c044c415 | 1478 | goto err; |
f204e0b8 | 1479 | |
6d382616 | 1480 | if ((rc = adapter->native->sl_ops->adapter_regs_init(adapter, dev))) |
c044c415 | 1481 | goto err; |
f204e0b8 | 1482 | |
48b3adf3 IM |
1483 | /* Required for devices using CAPP DMA mode, harmless for others */ |
1484 | pci_set_master(dev); | |
1485 | ||
497a0790 PB |
1486 | adapter->tunneled_ops_supported = false; |
1487 | ||
1488 | if (cxl_is_power9()) { | |
401dca8c PB |
1489 | if (pnv_pci_set_tunnel_bar(dev, 0x00020000E0000000ull, 1)) |
1490 | dev_info(&dev->dev, "Tunneled operations unsupported\n"); | |
497a0790 PB |
1491 | else |
1492 | adapter->tunneled_ops_supported = true; | |
1493 | } | |
401dca8c | 1494 | |
b385c9e9 | 1495 | if ((rc = pnv_phb_to_cxl_mode(dev, adapter->native->sl_ops->capi_mode))) |
c044c415 | 1496 | goto err; |
f204e0b8 | 1497 | |
1212aa1c RG |
1498 | /* If recovery happened, the last step is to turn on snooping. |
1499 | * In the non-recovery case this has no effect */ | |
c044c415 DA |
1500 | if ((rc = pnv_phb_to_cxl_mode(dev, OPAL_PHB_CAPI_MODE_SNOOP_ON))) |
1501 | goto err; | |
1212aa1c | 1502 | |
e009a7e8 FB |
1503 | /* Ignore error, adapter init is not dependant on timebase sync */ |
1504 | cxl_setup_psl_timebase(adapter, dev); | |
390fd592 | 1505 | |
2b04cf31 | 1506 | if ((rc = cxl_native_register_psl_err_irq(adapter))) |
c044c415 DA |
1507 | goto err; |
1508 | ||
1509 | return 0; | |
1510 | ||
1511 | err: | |
1512 | cxl_unmap_adapter_regs(adapter); | |
1513 | return rc; | |
1514 | ||
1515 | } | |
1516 | ||
1517 | static void cxl_deconfigure_adapter(struct cxl *adapter) | |
1518 | { | |
1519 | struct pci_dev *pdev = to_pci_dev(adapter->dev.parent); | |
1520 | ||
401dca8c PB |
1521 | if (cxl_is_power9()) |
1522 | pnv_pci_set_tunnel_bar(pdev, 0x00020000E0000000ull, 0); | |
1523 | ||
2b04cf31 | 1524 | cxl_native_release_psl_err_irq(adapter); |
c044c415 DA |
1525 | cxl_unmap_adapter_regs(adapter); |
1526 | ||
1527 | pci_disable_device(pdev); | |
1528 | } | |
1529 | ||
cbb55eeb VJ |
1530 | static void cxl_stop_trace_psl9(struct cxl *adapter) |
1531 | { | |
1532 | int traceid; | |
1533 | u64 trace_state, trace_mask; | |
1534 | struct pci_dev *dev = to_pci_dev(adapter->dev.parent); | |
1535 | ||
1536 | /* read each tracearray state and issue mmio to stop them is needed */ | |
1537 | for (traceid = 0; traceid <= CXL_PSL9_TRACEID_MAX; ++traceid) { | |
1538 | trace_state = cxl_p1_read(adapter, CXL_PSL9_CTCCFG); | |
1539 | trace_mask = (0x3ULL << (62 - traceid * 2)); | |
1540 | trace_state = (trace_state & trace_mask) >> (62 - traceid * 2); | |
1541 | dev_dbg(&dev->dev, "cxl: Traceid-%d trace_state=0x%0llX\n", | |
1542 | traceid, trace_state); | |
1543 | ||
1544 | /* issue mmio if the trace array isn't in FIN state */ | |
1545 | if (trace_state != CXL_PSL9_TRACESTATE_FIN) | |
1546 | cxl_p1_write(adapter, CXL_PSL9_TRACECFG, | |
1547 | 0x8400000000000000ULL | traceid); | |
1548 | } | |
1549 | } | |
1550 | ||
1551 | static void cxl_stop_trace_psl8(struct cxl *adapter) | |
1552 | { | |
1553 | int slice; | |
1554 | ||
1555 | /* Stop the trace */ | |
1556 | cxl_p1_write(adapter, CXL_PSL_TRACE, 0x8000000000000017LL); | |
1557 | ||
1558 | /* Stop the slice traces */ | |
1559 | spin_lock(&adapter->afu_list_lock); | |
1560 | for (slice = 0; slice < adapter->slices; slice++) { | |
1561 | if (adapter->afu[slice]) | |
1562 | cxl_p1n_write(adapter->afu[slice], CXL_PSL_SLICE_TRACE, | |
1563 | 0x8000000000000000LL); | |
1564 | } | |
1565 | spin_unlock(&adapter->afu_list_lock); | |
1566 | } | |
1567 | ||
f24be42a CL |
1568 | static const struct cxl_service_layer_ops psl9_ops = { |
1569 | .adapter_regs_init = init_implementation_adapter_regs_psl9, | |
1570 | .invalidate_all = cxl_invalidate_all_psl9, | |
1571 | .afu_regs_init = init_implementation_afu_regs_psl9, | |
1572 | .sanitise_afu_regs = sanitise_afu_regs_psl9, | |
6d382616 FB |
1573 | .register_serr_irq = cxl_native_register_serr_irq, |
1574 | .release_serr_irq = cxl_native_release_serr_irq, | |
f24be42a CL |
1575 | .handle_interrupt = cxl_irq_psl9, |
1576 | .fail_irq = cxl_fail_irq_psl, | |
1577 | .activate_dedicated_process = cxl_activate_dedicated_process_psl9, | |
1578 | .attach_afu_directed = cxl_attach_afu_directed_psl9, | |
1579 | .attach_dedicated_process = cxl_attach_dedicated_process_psl9, | |
1580 | .update_dedicated_ivtes = cxl_update_dedicated_ivtes_psl9, | |
1581 | .debugfs_add_adapter_regs = cxl_debugfs_add_adapter_regs_psl9, | |
1582 | .debugfs_add_afu_regs = cxl_debugfs_add_afu_regs_psl9, | |
1583 | .psl_irq_dump_registers = cxl_native_irq_dump_regs_psl9, | |
990f19ae | 1584 | .err_irq_dump_registers = cxl_native_err_irq_dump_regs_psl9, |
f24be42a | 1585 | .debugfs_stop_trace = cxl_stop_trace_psl9, |
f24be42a CL |
1586 | .timebase_read = timebase_read_psl9, |
1587 | .capi_mode = OPAL_PHB_CAPI_MODE_CAPI, | |
1588 | .needs_reset_before_disable = true, | |
1589 | }; | |
1590 | ||
64663f37 CL |
1591 | static const struct cxl_service_layer_ops psl8_ops = { |
1592 | .adapter_regs_init = init_implementation_adapter_regs_psl8, | |
1593 | .invalidate_all = cxl_invalidate_all_psl8, | |
1594 | .afu_regs_init = init_implementation_afu_regs_psl8, | |
1595 | .sanitise_afu_regs = sanitise_afu_regs_psl8, | |
6d382616 FB |
1596 | .register_serr_irq = cxl_native_register_serr_irq, |
1597 | .release_serr_irq = cxl_native_release_serr_irq, | |
64663f37 | 1598 | .handle_interrupt = cxl_irq_psl8, |
bdd2e715 | 1599 | .fail_irq = cxl_fail_irq_psl, |
64663f37 CL |
1600 | .activate_dedicated_process = cxl_activate_dedicated_process_psl8, |
1601 | .attach_afu_directed = cxl_attach_afu_directed_psl8, | |
1602 | .attach_dedicated_process = cxl_attach_dedicated_process_psl8, | |
1603 | .update_dedicated_ivtes = cxl_update_dedicated_ivtes_psl8, | |
1604 | .debugfs_add_adapter_regs = cxl_debugfs_add_adapter_regs_psl8, | |
1605 | .debugfs_add_afu_regs = cxl_debugfs_add_afu_regs_psl8, | |
1606 | .psl_irq_dump_registers = cxl_native_irq_dump_regs_psl8, | |
990f19ae | 1607 | .err_irq_dump_registers = cxl_native_err_irq_dump_regs_psl8, |
64663f37 CL |
1608 | .debugfs_stop_trace = cxl_stop_trace_psl8, |
1609 | .write_timebase_ctrl = write_timebase_ctrl_psl8, | |
1610 | .timebase_read = timebase_read_psl8, | |
b385c9e9 | 1611 | .capi_mode = OPAL_PHB_CAPI_MODE_CAPI, |
5e7823c9 | 1612 | .needs_reset_before_disable = true, |
6d382616 FB |
1613 | }; |
1614 | ||
6d382616 FB |
1615 | static void set_sl_ops(struct cxl *adapter, struct pci_dev *dev) |
1616 | { | |
f3988ca4 FB |
1617 | if (cxl_is_power8()) { |
1618 | dev_info(&dev->dev, "Device uses a PSL8\n"); | |
1619 | adapter->native->sl_ops = &psl8_ops; | |
6d382616 | 1620 | } else { |
f3988ca4 FB |
1621 | dev_info(&dev->dev, "Device uses a PSL9\n"); |
1622 | adapter->native->sl_ops = &psl9_ops; | |
6d382616 FB |
1623 | } |
1624 | } | |
1625 | ||
1626 | ||
2b04cf31 | 1627 | static struct cxl *cxl_pci_init_adapter(struct pci_dev *dev) |
c044c415 DA |
1628 | { |
1629 | struct cxl *adapter; | |
1630 | int rc; | |
1631 | ||
1632 | adapter = cxl_alloc_adapter(); | |
1633 | if (!adapter) | |
1634 | return ERR_PTR(-ENOMEM); | |
1635 | ||
cbffa3a5 CL |
1636 | adapter->native = kzalloc(sizeof(struct cxl_native), GFP_KERNEL); |
1637 | if (!adapter->native) { | |
1638 | rc = -ENOMEM; | |
1639 | goto err_release; | |
1640 | } | |
1641 | ||
6d382616 FB |
1642 | set_sl_ops(adapter, dev); |
1643 | ||
c044c415 DA |
1644 | /* Set defaults for parameters which need to persist over |
1645 | * configure/reconfigure | |
1646 | */ | |
1647 | adapter->perst_loads_image = true; | |
13e68d8b | 1648 | adapter->perst_same_image = false; |
c044c415 DA |
1649 | |
1650 | rc = cxl_configure_adapter(adapter, dev); | |
1651 | if (rc) { | |
1652 | pci_disable_device(dev); | |
cbffa3a5 | 1653 | goto err_release; |
c044c415 | 1654 | } |
f204e0b8 IM |
1655 | |
1656 | /* Don't care if this one fails: */ | |
1657 | cxl_debugfs_adapter_add(adapter); | |
1658 | ||
1659 | /* | |
1660 | * After we call this function we must not free the adapter directly, | |
1661 | * even if it returns an error! | |
1662 | */ | |
1663 | if ((rc = cxl_register_adapter(adapter))) | |
8bf03f55 | 1664 | goto err_put_dev; |
f204e0b8 IM |
1665 | |
1666 | if ((rc = cxl_sysfs_adapter_add(adapter))) | |
8bf03f55 | 1667 | goto err_del_dev; |
f204e0b8 | 1668 | |
ea9a26d1 VJ |
1669 | /* Release the context lock as adapter is configured */ |
1670 | cxl_adapter_context_unlock(adapter); | |
1671 | ||
f204e0b8 IM |
1672 | return adapter; |
1673 | ||
8bf03f55 YY |
1674 | err_del_dev: |
1675 | device_del(&adapter->dev); | |
1676 | err_put_dev: | |
c044c415 DA |
1677 | /* This should mirror cxl_remove_adapter, except without the |
1678 | * sysfs parts | |
1679 | */ | |
f204e0b8 | 1680 | cxl_debugfs_adapter_remove(adapter); |
c044c415 | 1681 | cxl_deconfigure_adapter(adapter); |
8bf03f55 | 1682 | put_device(&adapter->dev); |
f204e0b8 | 1683 | return ERR_PTR(rc); |
cbffa3a5 CL |
1684 | |
1685 | err_release: | |
1686 | cxl_release_adapter(&adapter->dev); | |
1687 | return ERR_PTR(rc); | |
f204e0b8 IM |
1688 | } |
1689 | ||
2b04cf31 | 1690 | static void cxl_pci_remove_adapter(struct cxl *adapter) |
f204e0b8 | 1691 | { |
c044c415 | 1692 | pr_devel("cxl_remove_adapter\n"); |
f204e0b8 IM |
1693 | |
1694 | cxl_sysfs_adapter_remove(adapter); | |
1695 | cxl_debugfs_adapter_remove(adapter); | |
f204e0b8 | 1696 | |
f24be42a CL |
1697 | /* |
1698 | * Flush adapter datacache as its about to be removed. | |
f24be42a | 1699 | */ |
94322ed8 | 1700 | cxl_data_cache_flush(adapter); |
d7b1946c | 1701 | |
c044c415 | 1702 | cxl_deconfigure_adapter(adapter); |
f204e0b8 | 1703 | |
c044c415 | 1704 | device_unregister(&adapter->dev); |
f204e0b8 IM |
1705 | } |
1706 | ||
3b3dcd61 PB |
1707 | #define CXL_MAX_PCIEX_PARENT 2 |
1708 | ||
3ced8d73 | 1709 | int cxl_slot_is_switched(struct pci_dev *dev) |
3b3dcd61 PB |
1710 | { |
1711 | struct device_node *np; | |
1712 | int depth = 0; | |
3b3dcd61 PB |
1713 | |
1714 | if (!(np = pci_device_to_OF_node(dev))) { | |
1715 | pr_err("cxl: np = NULL\n"); | |
1716 | return -ENODEV; | |
1717 | } | |
1718 | of_node_get(np); | |
1719 | while (np) { | |
1720 | np = of_get_next_parent(np); | |
d2db0979 | 1721 | if (!of_node_is_type(np, "pciex")) |
3b3dcd61 PB |
1722 | break; |
1723 | depth++; | |
1724 | } | |
1725 | of_node_put(np); | |
1726 | return (depth > CXL_MAX_PCIEX_PARENT); | |
1727 | } | |
1728 | ||
f204e0b8 IM |
1729 | static int cxl_probe(struct pci_dev *dev, const struct pci_device_id *id) |
1730 | { | |
1731 | struct cxl *adapter; | |
1732 | int slice; | |
1733 | int rc; | |
1734 | ||
17eb3eef VJ |
1735 | if (cxl_pci_is_vphb_device(dev)) { |
1736 | dev_dbg(&dev->dev, "cxl_init_adapter: Ignoring cxl vphb device\n"); | |
1737 | return -ENODEV; | |
1738 | } | |
1739 | ||
3b3dcd61 PB |
1740 | if (cxl_slot_is_switched(dev)) { |
1741 | dev_info(&dev->dev, "Ignoring card on incompatible PCI slot\n"); | |
1742 | return -ENODEV; | |
1743 | } | |
1744 | ||
f24be42a CL |
1745 | if (cxl_is_power9() && !radix_enabled()) { |
1746 | dev_info(&dev->dev, "Only Radix mode supported\n"); | |
1747 | return -ENODEV; | |
1748 | } | |
1749 | ||
f204e0b8 IM |
1750 | if (cxl_verbose) |
1751 | dump_cxl_config_space(dev); | |
1752 | ||
2b04cf31 | 1753 | adapter = cxl_pci_init_adapter(dev); |
f204e0b8 IM |
1754 | if (IS_ERR(adapter)) { |
1755 | dev_err(&dev->dev, "cxl_init_adapter failed: %li\n", PTR_ERR(adapter)); | |
1756 | return PTR_ERR(adapter); | |
1757 | } | |
1758 | ||
1759 | for (slice = 0; slice < adapter->slices; slice++) { | |
2b04cf31 | 1760 | if ((rc = pci_init_afu(adapter, slice, dev))) { |
f204e0b8 | 1761 | dev_err(&dev->dev, "AFU %i failed to initialise: %i\n", slice, rc); |
d76427b0 DA |
1762 | continue; |
1763 | } | |
1764 | ||
1765 | rc = cxl_afu_select_best_mode(adapter->afu[slice]); | |
1766 | if (rc) | |
1767 | dev_err(&dev->dev, "AFU %i failed to start: %i\n", slice, rc); | |
f204e0b8 IM |
1768 | } |
1769 | ||
1770 | return 0; | |
1771 | } | |
1772 | ||
1773 | static void cxl_remove(struct pci_dev *dev) | |
1774 | { | |
1775 | struct cxl *adapter = pci_get_drvdata(dev); | |
6f7f0b3d MN |
1776 | struct cxl_afu *afu; |
1777 | int i; | |
f204e0b8 | 1778 | |
f204e0b8 IM |
1779 | /* |
1780 | * Lock to prevent someone grabbing a ref through the adapter list as | |
1781 | * we are removing it | |
1782 | */ | |
6f7f0b3d MN |
1783 | for (i = 0; i < adapter->slices; i++) { |
1784 | afu = adapter->afu[i]; | |
2b04cf31 | 1785 | cxl_pci_remove_afu(afu); |
6f7f0b3d | 1786 | } |
2b04cf31 | 1787 | cxl_pci_remove_adapter(adapter); |
f204e0b8 IM |
1788 | } |
1789 | ||
9e8df8a2 DA |
1790 | static pci_ers_result_t cxl_vphb_error_detected(struct cxl_afu *afu, |
1791 | pci_channel_state_t state) | |
1792 | { | |
1793 | struct pci_dev *afu_dev; | |
4e59b754 BH |
1794 | struct pci_driver *afu_drv; |
1795 | const struct pci_error_handlers *err_handler; | |
9e8df8a2 DA |
1796 | pci_ers_result_t result = PCI_ERS_RESULT_NEED_RESET; |
1797 | pci_ers_result_t afu_result = PCI_ERS_RESULT_NEED_RESET; | |
1798 | ||
1799 | /* There should only be one entry, but go through the list | |
1800 | * anyway | |
1801 | */ | |
edeb304f | 1802 | if (afu == NULL || afu->phb == NULL) |
12841f87 VJ |
1803 | return result; |
1804 | ||
9e8df8a2 | 1805 | list_for_each_entry(afu_dev, &afu->phb->bus->devices, bus_list) { |
16bd44e5 | 1806 | afu_drv = to_pci_driver(afu_dev->dev.driver); |
4e59b754 | 1807 | if (!afu_drv) |
9e8df8a2 DA |
1808 | continue; |
1809 | ||
1810 | afu_dev->error_state = state; | |
1811 | ||
4e59b754 BH |
1812 | err_handler = afu_drv->err_handler; |
1813 | if (err_handler) | |
1814 | afu_result = err_handler->error_detected(afu_dev, | |
1815 | state); | |
9e8df8a2 DA |
1816 | /* Disconnect trumps all, NONE trumps NEED_RESET */ |
1817 | if (afu_result == PCI_ERS_RESULT_DISCONNECT) | |
1818 | result = PCI_ERS_RESULT_DISCONNECT; | |
1819 | else if ((afu_result == PCI_ERS_RESULT_NONE) && | |
1820 | (result == PCI_ERS_RESULT_NEED_RESET)) | |
1821 | result = PCI_ERS_RESULT_NONE; | |
1822 | } | |
1823 | return result; | |
1824 | } | |
1825 | ||
1826 | static pci_ers_result_t cxl_pci_error_detected(struct pci_dev *pdev, | |
1827 | pci_channel_state_t state) | |
1828 | { | |
1829 | struct cxl *adapter = pci_get_drvdata(pdev); | |
1830 | struct cxl_afu *afu; | |
edeb304f VJ |
1831 | pci_ers_result_t result = PCI_ERS_RESULT_NEED_RESET; |
1832 | pci_ers_result_t afu_result = PCI_ERS_RESULT_NEED_RESET; | |
9e8df8a2 DA |
1833 | int i; |
1834 | ||
1835 | /* At this point, we could still have an interrupt pending. | |
1836 | * Let's try to get them out of the way before they do | |
1837 | * anything we don't like. | |
1838 | */ | |
1839 | schedule(); | |
1840 | ||
1841 | /* If we're permanently dead, give up. */ | |
1842 | if (state == pci_channel_io_perm_failure) { | |
edeb304f | 1843 | spin_lock(&adapter->afu_list_lock); |
9e8df8a2 DA |
1844 | for (i = 0; i < adapter->slices; i++) { |
1845 | afu = adapter->afu[i]; | |
07f5ab60 VJ |
1846 | /* |
1847 | * Tell the AFU drivers; but we don't care what they | |
1848 | * say, we're going away. | |
1849 | */ | |
12841f87 | 1850 | cxl_vphb_error_detected(afu, state); |
9e8df8a2 | 1851 | } |
edeb304f | 1852 | spin_unlock(&adapter->afu_list_lock); |
9e8df8a2 DA |
1853 | return PCI_ERS_RESULT_DISCONNECT; |
1854 | } | |
1855 | ||
1856 | /* Are we reflashing? | |
1857 | * | |
1858 | * If we reflash, we could come back as something entirely | |
1859 | * different, including a non-CAPI card. As such, by default | |
1860 | * we don't participate in the process. We'll be unbound and | |
1861 | * the slot re-probed. (TODO: check EEH doesn't blindly rebind | |
1862 | * us!) | |
1863 | * | |
1864 | * However, this isn't the entire story: for reliablity | |
1865 | * reasons, we usually want to reflash the FPGA on PERST in | |
1866 | * order to get back to a more reliable known-good state. | |
1867 | * | |
1868 | * This causes us a bit of a problem: if we reflash we can't | |
1869 | * trust that we'll come back the same - we could have a new | |
1870 | * image and been PERSTed in order to load that | |
1871 | * image. However, most of the time we actually *will* come | |
1872 | * back the same - for example a regular EEH event. | |
1873 | * | |
1874 | * Therefore, we allow the user to assert that the image is | |
1875 | * indeed the same and that we should continue on into EEH | |
1876 | * anyway. | |
1877 | */ | |
1878 | if (adapter->perst_loads_image && !adapter->perst_same_image) { | |
1879 | /* TODO take the PHB out of CXL mode */ | |
1880 | dev_info(&pdev->dev, "reflashing, so opting out of EEH!\n"); | |
1881 | return PCI_ERS_RESULT_NONE; | |
1882 | } | |
1883 | ||
1884 | /* | |
1885 | * At this point, we want to try to recover. We'll always | |
1886 | * need a complete slot reset: we don't trust any other reset. | |
1887 | * | |
1888 | * Now, we go through each AFU: | |
1889 | * - We send the driver, if bound, an error_detected callback. | |
1890 | * We expect it to clean up, but it can also tell us to give | |
1891 | * up and permanently detach the card. To simplify things, if | |
1892 | * any bound AFU driver doesn't support EEH, we give up on EEH. | |
1893 | * | |
1894 | * - We detach all contexts associated with the AFU. This | |
1895 | * does not free them, but puts them into a CLOSED state | |
1896 | * which causes any the associated files to return useful | |
1897 | * errors to userland. It also unmaps, but does not free, | |
1898 | * any IRQs. | |
1899 | * | |
1900 | * - We clean up our side: releasing and unmapping resources we hold | |
1901 | * so we can wire them up again when the hardware comes back up. | |
1902 | * | |
1903 | * Driver authors should note: | |
1904 | * | |
1905 | * - Any contexts you create in your kernel driver (except | |
1906 | * those associated with anonymous file descriptors) are | |
1907 | * your responsibility to free and recreate. Likewise with | |
1908 | * any attached resources. | |
1909 | * | |
1910 | * - We will take responsibility for re-initialising the | |
1911 | * device context (the one set up for you in | |
1912 | * cxl_pci_enable_device_hook and accessed through | |
1913 | * cxl_get_context). If you've attached IRQs or other | |
1914 | * resources to it, they remains yours to free. | |
1915 | * | |
1916 | * You can call the same functions to release resources as you | |
1917 | * normally would: we make sure that these functions continue | |
1918 | * to work when the hardware is down. | |
1919 | * | |
1920 | * Two examples: | |
1921 | * | |
1922 | * 1) If you normally free all your resources at the end of | |
1923 | * each request, or if you use anonymous FDs, your | |
1924 | * error_detected callback can simply set a flag to tell | |
1925 | * your driver not to start any new calls. You can then | |
1926 | * clear the flag in the resume callback. | |
1927 | * | |
1928 | * 2) If you normally allocate your resources on startup: | |
1929 | * * Set a flag in error_detected as above. | |
1930 | * * Let CXL detach your contexts. | |
1931 | * * In slot_reset, free the old resources and allocate new ones. | |
1932 | * * In resume, clear the flag to allow things to start. | |
1933 | */ | |
edeb304f VJ |
1934 | |
1935 | /* Make sure no one else changes the afu list */ | |
1936 | spin_lock(&adapter->afu_list_lock); | |
1937 | ||
9e8df8a2 DA |
1938 | for (i = 0; i < adapter->slices; i++) { |
1939 | afu = adapter->afu[i]; | |
1940 | ||
edeb304f VJ |
1941 | if (afu == NULL) |
1942 | continue; | |
9e8df8a2 | 1943 | |
edeb304f | 1944 | afu_result = cxl_vphb_error_detected(afu, state); |
9e8df8a2 | 1945 | cxl_context_detach_all(afu); |
5be587b1 | 1946 | cxl_ops->afu_deactivate_mode(afu, afu->current_mode); |
2b04cf31 | 1947 | pci_deconfigure_afu(afu); |
4f58f0bf VJ |
1948 | |
1949 | /* Disconnect trumps all, NONE trumps NEED_RESET */ | |
1950 | if (afu_result == PCI_ERS_RESULT_DISCONNECT) | |
1951 | result = PCI_ERS_RESULT_DISCONNECT; | |
1952 | else if ((afu_result == PCI_ERS_RESULT_NONE) && | |
1953 | (result == PCI_ERS_RESULT_NEED_RESET)) | |
1954 | result = PCI_ERS_RESULT_NONE; | |
9e8df8a2 | 1955 | } |
edeb304f | 1956 | spin_unlock(&adapter->afu_list_lock); |
ea9a26d1 VJ |
1957 | |
1958 | /* should take the context lock here */ | |
1959 | if (cxl_adapter_context_lock(adapter) != 0) | |
1960 | dev_warn(&adapter->dev, | |
1961 | "Couldn't take context lock with %d active-contexts\n", | |
1962 | atomic_read(&adapter->contexts_num)); | |
1963 | ||
9e8df8a2 DA |
1964 | cxl_deconfigure_adapter(adapter); |
1965 | ||
1966 | return result; | |
1967 | } | |
1968 | ||
1969 | static pci_ers_result_t cxl_pci_slot_reset(struct pci_dev *pdev) | |
1970 | { | |
1971 | struct cxl *adapter = pci_get_drvdata(pdev); | |
1972 | struct cxl_afu *afu; | |
1973 | struct cxl_context *ctx; | |
1974 | struct pci_dev *afu_dev; | |
4e59b754 BH |
1975 | struct pci_driver *afu_drv; |
1976 | const struct pci_error_handlers *err_handler; | |
9e8df8a2 DA |
1977 | pci_ers_result_t afu_result = PCI_ERS_RESULT_RECOVERED; |
1978 | pci_ers_result_t result = PCI_ERS_RESULT_RECOVERED; | |
1979 | int i; | |
1980 | ||
1981 | if (cxl_configure_adapter(adapter, pdev)) | |
1982 | goto err; | |
1983 | ||
ea9a26d1 VJ |
1984 | /* |
1985 | * Unlock context activation for the adapter. Ideally this should be | |
1986 | * done in cxl_pci_resume but cxlflash module tries to activate the | |
1987 | * master context as part of slot_reset callback. | |
1988 | */ | |
1989 | cxl_adapter_context_unlock(adapter); | |
1990 | ||
edeb304f | 1991 | spin_lock(&adapter->afu_list_lock); |
9e8df8a2 DA |
1992 | for (i = 0; i < adapter->slices; i++) { |
1993 | afu = adapter->afu[i]; | |
1994 | ||
edeb304f VJ |
1995 | if (afu == NULL) |
1996 | continue; | |
1997 | ||
2b04cf31 | 1998 | if (pci_configure_afu(afu, adapter, pdev)) |
edeb304f | 1999 | goto err_unlock; |
9e8df8a2 DA |
2000 | |
2001 | if (cxl_afu_select_best_mode(afu)) | |
edeb304f | 2002 | goto err_unlock; |
9e8df8a2 | 2003 | |
12841f87 VJ |
2004 | if (afu->phb == NULL) |
2005 | continue; | |
2006 | ||
9e8df8a2 DA |
2007 | list_for_each_entry(afu_dev, &afu->phb->bus->devices, bus_list) { |
2008 | /* Reset the device context. | |
2009 | * TODO: make this less disruptive | |
2010 | */ | |
2011 | ctx = cxl_get_context(afu_dev); | |
2012 | ||
2013 | if (ctx && cxl_release_context(ctx)) | |
edeb304f | 2014 | goto err_unlock; |
9e8df8a2 DA |
2015 | |
2016 | ctx = cxl_dev_context_init(afu_dev); | |
bb81733d | 2017 | if (IS_ERR(ctx)) |
edeb304f | 2018 | goto err_unlock; |
9e8df8a2 DA |
2019 | |
2020 | afu_dev->dev.archdata.cxl_ctx = ctx; | |
2021 | ||
5be587b1 | 2022 | if (cxl_ops->afu_check_and_enable(afu)) |
edeb304f | 2023 | goto err_unlock; |
9e8df8a2 DA |
2024 | |
2025 | afu_dev->error_state = pci_channel_io_normal; | |
2026 | ||
2027 | /* If there's a driver attached, allow it to | |
2028 | * chime in on recovery. Drivers should check | |
2029 | * if everything has come back OK, but | |
2030 | * shouldn't start new work until we call | |
2031 | * their resume function. | |
2032 | */ | |
16bd44e5 | 2033 | afu_drv = to_pci_driver(afu_dev->dev.driver); |
4e59b754 | 2034 | if (!afu_drv) |
9e8df8a2 DA |
2035 | continue; |
2036 | ||
4e59b754 BH |
2037 | err_handler = afu_drv->err_handler; |
2038 | if (err_handler && err_handler->slot_reset) | |
2039 | afu_result = err_handler->slot_reset(afu_dev); | |
9e8df8a2 DA |
2040 | |
2041 | if (afu_result == PCI_ERS_RESULT_DISCONNECT) | |
2042 | result = PCI_ERS_RESULT_DISCONNECT; | |
2043 | } | |
2044 | } | |
edeb304f VJ |
2045 | |
2046 | spin_unlock(&adapter->afu_list_lock); | |
9e8df8a2 DA |
2047 | return result; |
2048 | ||
edeb304f VJ |
2049 | err_unlock: |
2050 | spin_unlock(&adapter->afu_list_lock); | |
2051 | ||
9e8df8a2 DA |
2052 | err: |
2053 | /* All the bits that happen in both error_detected and cxl_remove | |
2054 | * should be idempotent, so we don't need to worry about leaving a mix | |
2055 | * of unconfigured and reconfigured resources. | |
2056 | */ | |
2057 | dev_err(&pdev->dev, "EEH recovery failed. Asking to be disconnected.\n"); | |
2058 | return PCI_ERS_RESULT_DISCONNECT; | |
2059 | } | |
2060 | ||
2061 | static void cxl_pci_resume(struct pci_dev *pdev) | |
2062 | { | |
2063 | struct cxl *adapter = pci_get_drvdata(pdev); | |
2064 | struct cxl_afu *afu; | |
2065 | struct pci_dev *afu_dev; | |
4e59b754 BH |
2066 | struct pci_driver *afu_drv; |
2067 | const struct pci_error_handlers *err_handler; | |
9e8df8a2 DA |
2068 | int i; |
2069 | ||
2070 | /* Everything is back now. Drivers should restart work now. | |
2071 | * This is not the place to be checking if everything came back up | |
2072 | * properly, because there's no return value: do that in slot_reset. | |
2073 | */ | |
edeb304f | 2074 | spin_lock(&adapter->afu_list_lock); |
9e8df8a2 DA |
2075 | for (i = 0; i < adapter->slices; i++) { |
2076 | afu = adapter->afu[i]; | |
2077 | ||
edeb304f | 2078 | if (afu == NULL || afu->phb == NULL) |
12841f87 VJ |
2079 | continue; |
2080 | ||
9e8df8a2 | 2081 | list_for_each_entry(afu_dev, &afu->phb->bus->devices, bus_list) { |
16bd44e5 | 2082 | afu_drv = to_pci_driver(afu_dev->dev.driver); |
4e59b754 BH |
2083 | if (!afu_drv) |
2084 | continue; | |
2085 | ||
2086 | err_handler = afu_drv->err_handler; | |
2087 | if (err_handler && err_handler->resume) | |
2088 | err_handler->resume(afu_dev); | |
9e8df8a2 DA |
2089 | } |
2090 | } | |
edeb304f | 2091 | spin_unlock(&adapter->afu_list_lock); |
9e8df8a2 DA |
2092 | } |
2093 | ||
2094 | static const struct pci_error_handlers cxl_err_handler = { | |
2095 | .error_detected = cxl_pci_error_detected, | |
2096 | .slot_reset = cxl_pci_slot_reset, | |
2097 | .resume = cxl_pci_resume, | |
2098 | }; | |
2099 | ||
f204e0b8 IM |
2100 | struct pci_driver cxl_pci_driver = { |
2101 | .name = "cxl-pci", | |
2102 | .id_table = cxl_pci_tbl, | |
2103 | .probe = cxl_probe, | |
2104 | .remove = cxl_remove, | |
aa70775e | 2105 | .shutdown = cxl_remove, |
9e8df8a2 | 2106 | .err_handler = &cxl_err_handler, |
f204e0b8 | 2107 | }; |