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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 | #include <linux/pci_regs.h> | |
11 | #include <linux/pci_ids.h> | |
12 | #include <linux/device.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/sort.h> | |
17 | #include <linux/pci.h> | |
18 | #include <linux/of.h> | |
19 | #include <linux/delay.h> | |
20 | #include <asm/opal.h> | |
21 | #include <asm/msi_bitmap.h> | |
22 | #include <asm/pci-bridge.h> /* for struct pci_controller */ | |
23 | #include <asm/pnv-pci.h> | |
62fa19d4 | 24 | #include <asm/io.h> |
f204e0b8 IM |
25 | |
26 | #include "cxl.h" | |
27 | ||
28 | ||
29 | #define CXL_PCI_VSEC_ID 0x1280 | |
30 | #define CXL_VSEC_MIN_SIZE 0x80 | |
31 | ||
32 | #define CXL_READ_VSEC_LENGTH(dev, vsec, dest) \ | |
33 | { \ | |
34 | pci_read_config_word(dev, vsec + 0x6, dest); \ | |
35 | *dest >>= 4; \ | |
36 | } | |
37 | #define CXL_READ_VSEC_NAFUS(dev, vsec, dest) \ | |
38 | pci_read_config_byte(dev, vsec + 0x8, dest) | |
39 | ||
40 | #define CXL_READ_VSEC_STATUS(dev, vsec, dest) \ | |
41 | pci_read_config_byte(dev, vsec + 0x9, dest) | |
42 | #define CXL_STATUS_SECOND_PORT 0x80 | |
43 | #define CXL_STATUS_MSI_X_FULL 0x40 | |
44 | #define CXL_STATUS_MSI_X_SINGLE 0x20 | |
45 | #define CXL_STATUS_FLASH_RW 0x08 | |
46 | #define CXL_STATUS_FLASH_RO 0x04 | |
47 | #define CXL_STATUS_LOADABLE_AFU 0x02 | |
48 | #define CXL_STATUS_LOADABLE_PSL 0x01 | |
49 | /* If we see these features we won't try to use the card */ | |
50 | #define CXL_UNSUPPORTED_FEATURES \ | |
51 | (CXL_STATUS_MSI_X_FULL | CXL_STATUS_MSI_X_SINGLE) | |
52 | ||
53 | #define CXL_READ_VSEC_MODE_CONTROL(dev, vsec, dest) \ | |
54 | pci_read_config_byte(dev, vsec + 0xa, dest) | |
55 | #define CXL_WRITE_VSEC_MODE_CONTROL(dev, vsec, val) \ | |
56 | pci_write_config_byte(dev, vsec + 0xa, val) | |
57 | #define CXL_VSEC_PROTOCOL_MASK 0xe0 | |
58 | #define CXL_VSEC_PROTOCOL_1024TB 0x80 | |
59 | #define CXL_VSEC_PROTOCOL_512TB 0x40 | |
60 | #define CXL_VSEC_PROTOCOL_256TB 0x20 /* Power 8 uses this */ | |
61 | #define CXL_VSEC_PROTOCOL_ENABLE 0x01 | |
62 | ||
63 | #define CXL_READ_VSEC_PSL_REVISION(dev, vsec, dest) \ | |
64 | pci_read_config_word(dev, vsec + 0xc, dest) | |
65 | #define CXL_READ_VSEC_CAIA_MINOR(dev, vsec, dest) \ | |
66 | pci_read_config_byte(dev, vsec + 0xe, dest) | |
67 | #define CXL_READ_VSEC_CAIA_MAJOR(dev, vsec, dest) \ | |
68 | pci_read_config_byte(dev, vsec + 0xf, dest) | |
69 | #define CXL_READ_VSEC_BASE_IMAGE(dev, vsec, dest) \ | |
70 | pci_read_config_word(dev, vsec + 0x10, dest) | |
71 | ||
72 | #define CXL_READ_VSEC_IMAGE_STATE(dev, vsec, dest) \ | |
73 | pci_read_config_byte(dev, vsec + 0x13, dest) | |
74 | #define CXL_WRITE_VSEC_IMAGE_STATE(dev, vsec, val) \ | |
75 | pci_write_config_byte(dev, vsec + 0x13, val) | |
76 | #define CXL_VSEC_USER_IMAGE_LOADED 0x80 /* RO */ | |
77 | #define CXL_VSEC_PERST_LOADS_IMAGE 0x20 /* RW */ | |
78 | #define CXL_VSEC_PERST_SELECT_USER 0x10 /* RW */ | |
79 | ||
80 | #define CXL_READ_VSEC_AFU_DESC_OFF(dev, vsec, dest) \ | |
81 | pci_read_config_dword(dev, vsec + 0x20, dest) | |
82 | #define CXL_READ_VSEC_AFU_DESC_SIZE(dev, vsec, dest) \ | |
83 | pci_read_config_dword(dev, vsec + 0x24, dest) | |
84 | #define CXL_READ_VSEC_PS_OFF(dev, vsec, dest) \ | |
85 | pci_read_config_dword(dev, vsec + 0x28, dest) | |
86 | #define CXL_READ_VSEC_PS_SIZE(dev, vsec, dest) \ | |
87 | pci_read_config_dword(dev, vsec + 0x2c, dest) | |
88 | ||
89 | ||
90 | /* This works a little different than the p1/p2 register accesses to make it | |
91 | * easier to pull out individual fields */ | |
92 | #define AFUD_READ(afu, off) in_be64(afu->afu_desc_mmio + off) | |
bfcdc8ff | 93 | #define AFUD_READ_LE(afu, off) in_le64(afu->afu_desc_mmio + off) |
f204e0b8 IM |
94 | #define EXTRACT_PPC_BIT(val, bit) (!!(val & PPC_BIT(bit))) |
95 | #define EXTRACT_PPC_BITS(val, bs, be) ((val & PPC_BITMASK(bs, be)) >> PPC_BITLSHIFT(be)) | |
96 | ||
97 | #define AFUD_READ_INFO(afu) AFUD_READ(afu, 0x0) | |
98 | #define AFUD_NUM_INTS_PER_PROC(val) EXTRACT_PPC_BITS(val, 0, 15) | |
99 | #define AFUD_NUM_PROCS(val) EXTRACT_PPC_BITS(val, 16, 31) | |
100 | #define AFUD_NUM_CRS(val) EXTRACT_PPC_BITS(val, 32, 47) | |
101 | #define AFUD_MULTIMODE(val) EXTRACT_PPC_BIT(val, 48) | |
102 | #define AFUD_PUSH_BLOCK_TRANSFER(val) EXTRACT_PPC_BIT(val, 55) | |
103 | #define AFUD_DEDICATED_PROCESS(val) EXTRACT_PPC_BIT(val, 59) | |
104 | #define AFUD_AFU_DIRECTED(val) EXTRACT_PPC_BIT(val, 61) | |
105 | #define AFUD_TIME_SLICED(val) EXTRACT_PPC_BIT(val, 63) | |
106 | #define AFUD_READ_CR(afu) AFUD_READ(afu, 0x20) | |
107 | #define AFUD_CR_LEN(val) EXTRACT_PPC_BITS(val, 8, 63) | |
108 | #define AFUD_READ_CR_OFF(afu) AFUD_READ(afu, 0x28) | |
109 | #define AFUD_READ_PPPSA(afu) AFUD_READ(afu, 0x30) | |
110 | #define AFUD_PPPSA_PP(val) EXTRACT_PPC_BIT(val, 6) | |
111 | #define AFUD_PPPSA_PSA(val) EXTRACT_PPC_BIT(val, 7) | |
112 | #define AFUD_PPPSA_LEN(val) EXTRACT_PPC_BITS(val, 8, 63) | |
113 | #define AFUD_READ_PPPSA_OFF(afu) AFUD_READ(afu, 0x38) | |
114 | #define AFUD_READ_EB(afu) AFUD_READ(afu, 0x40) | |
115 | #define AFUD_EB_LEN(val) EXTRACT_PPC_BITS(val, 8, 63) | |
116 | #define AFUD_READ_EB_OFF(afu) AFUD_READ(afu, 0x48) | |
117 | ||
b087e619 IM |
118 | u16 cxl_afu_cr_read16(struct cxl_afu *afu, int cr, u64 off) |
119 | { | |
120 | u64 aligned_off = off & ~0x3L; | |
121 | u32 val; | |
122 | ||
123 | val = cxl_afu_cr_read32(afu, cr, aligned_off); | |
124 | return (val >> ((off & 0x2) * 8)) & 0xffff; | |
125 | } | |
126 | ||
127 | u8 cxl_afu_cr_read8(struct cxl_afu *afu, int cr, u64 off) | |
128 | { | |
129 | u64 aligned_off = off & ~0x3L; | |
130 | u32 val; | |
131 | ||
132 | val = cxl_afu_cr_read32(afu, cr, aligned_off); | |
133 | return (val >> ((off & 0x3) * 8)) & 0xff; | |
134 | } | |
135 | ||
f204e0b8 IM |
136 | static DEFINE_PCI_DEVICE_TABLE(cxl_pci_tbl) = { |
137 | { PCI_DEVICE(PCI_VENDOR_ID_IBM, 0x0477), }, | |
138 | { PCI_DEVICE(PCI_VENDOR_ID_IBM, 0x044b), }, | |
139 | { PCI_DEVICE(PCI_VENDOR_ID_IBM, 0x04cf), }, | |
140 | { PCI_DEVICE_CLASS(0x120000, ~0), }, | |
141 | ||
142 | { } | |
143 | }; | |
144 | MODULE_DEVICE_TABLE(pci, cxl_pci_tbl); | |
145 | ||
146 | ||
147 | /* | |
148 | * Mostly using these wrappers to avoid confusion: | |
149 | * priv 1 is BAR2, while priv 2 is BAR0 | |
150 | */ | |
151 | static inline resource_size_t p1_base(struct pci_dev *dev) | |
152 | { | |
153 | return pci_resource_start(dev, 2); | |
154 | } | |
155 | ||
156 | static inline resource_size_t p1_size(struct pci_dev *dev) | |
157 | { | |
158 | return pci_resource_len(dev, 2); | |
159 | } | |
160 | ||
161 | static inline resource_size_t p2_base(struct pci_dev *dev) | |
162 | { | |
163 | return pci_resource_start(dev, 0); | |
164 | } | |
165 | ||
166 | static inline resource_size_t p2_size(struct pci_dev *dev) | |
167 | { | |
168 | return pci_resource_len(dev, 0); | |
169 | } | |
170 | ||
171 | static int find_cxl_vsec(struct pci_dev *dev) | |
172 | { | |
173 | int vsec = 0; | |
174 | u16 val; | |
175 | ||
176 | while ((vsec = pci_find_next_ext_capability(dev, vsec, PCI_EXT_CAP_ID_VNDR))) { | |
177 | pci_read_config_word(dev, vsec + 0x4, &val); | |
178 | if (val == CXL_PCI_VSEC_ID) | |
179 | return vsec; | |
180 | } | |
181 | return 0; | |
182 | ||
183 | } | |
184 | ||
185 | static void dump_cxl_config_space(struct pci_dev *dev) | |
186 | { | |
187 | int vsec; | |
188 | u32 val; | |
189 | ||
190 | dev_info(&dev->dev, "dump_cxl_config_space\n"); | |
191 | ||
192 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &val); | |
193 | dev_info(&dev->dev, "BAR0: %#.8x\n", val); | |
194 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, &val); | |
195 | dev_info(&dev->dev, "BAR1: %#.8x\n", val); | |
196 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_2, &val); | |
197 | dev_info(&dev->dev, "BAR2: %#.8x\n", val); | |
198 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_3, &val); | |
199 | dev_info(&dev->dev, "BAR3: %#.8x\n", val); | |
200 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_4, &val); | |
201 | dev_info(&dev->dev, "BAR4: %#.8x\n", val); | |
202 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_5, &val); | |
203 | dev_info(&dev->dev, "BAR5: %#.8x\n", val); | |
204 | ||
205 | dev_info(&dev->dev, "p1 regs: %#llx, len: %#llx\n", | |
206 | p1_base(dev), p1_size(dev)); | |
207 | dev_info(&dev->dev, "p2 regs: %#llx, len: %#llx\n", | |
f2931069 | 208 | p2_base(dev), p2_size(dev)); |
f204e0b8 IM |
209 | dev_info(&dev->dev, "BAR 4/5: %#llx, len: %#llx\n", |
210 | pci_resource_start(dev, 4), pci_resource_len(dev, 4)); | |
211 | ||
212 | if (!(vsec = find_cxl_vsec(dev))) | |
213 | return; | |
214 | ||
215 | #define show_reg(name, what) \ | |
216 | dev_info(&dev->dev, "cxl vsec: %30s: %#x\n", name, what) | |
217 | ||
218 | pci_read_config_dword(dev, vsec + 0x0, &val); | |
219 | show_reg("Cap ID", (val >> 0) & 0xffff); | |
220 | show_reg("Cap Ver", (val >> 16) & 0xf); | |
221 | show_reg("Next Cap Ptr", (val >> 20) & 0xfff); | |
222 | pci_read_config_dword(dev, vsec + 0x4, &val); | |
223 | show_reg("VSEC ID", (val >> 0) & 0xffff); | |
224 | show_reg("VSEC Rev", (val >> 16) & 0xf); | |
225 | show_reg("VSEC Length", (val >> 20) & 0xfff); | |
226 | pci_read_config_dword(dev, vsec + 0x8, &val); | |
227 | show_reg("Num AFUs", (val >> 0) & 0xff); | |
228 | show_reg("Status", (val >> 8) & 0xff); | |
229 | show_reg("Mode Control", (val >> 16) & 0xff); | |
230 | show_reg("Reserved", (val >> 24) & 0xff); | |
231 | pci_read_config_dword(dev, vsec + 0xc, &val); | |
232 | show_reg("PSL Rev", (val >> 0) & 0xffff); | |
233 | show_reg("CAIA Ver", (val >> 16) & 0xffff); | |
234 | pci_read_config_dword(dev, vsec + 0x10, &val); | |
235 | show_reg("Base Image Rev", (val >> 0) & 0xffff); | |
236 | show_reg("Reserved", (val >> 16) & 0x0fff); | |
237 | show_reg("Image Control", (val >> 28) & 0x3); | |
238 | show_reg("Reserved", (val >> 30) & 0x1); | |
239 | show_reg("Image Loaded", (val >> 31) & 0x1); | |
240 | ||
241 | pci_read_config_dword(dev, vsec + 0x14, &val); | |
242 | show_reg("Reserved", val); | |
243 | pci_read_config_dword(dev, vsec + 0x18, &val); | |
244 | show_reg("Reserved", val); | |
245 | pci_read_config_dword(dev, vsec + 0x1c, &val); | |
246 | show_reg("Reserved", val); | |
247 | ||
248 | pci_read_config_dword(dev, vsec + 0x20, &val); | |
249 | show_reg("AFU Descriptor Offset", val); | |
250 | pci_read_config_dword(dev, vsec + 0x24, &val); | |
251 | show_reg("AFU Descriptor Size", val); | |
252 | pci_read_config_dword(dev, vsec + 0x28, &val); | |
253 | show_reg("Problem State Offset", val); | |
254 | pci_read_config_dword(dev, vsec + 0x2c, &val); | |
255 | show_reg("Problem State Size", val); | |
256 | ||
257 | pci_read_config_dword(dev, vsec + 0x30, &val); | |
258 | show_reg("Reserved", val); | |
259 | pci_read_config_dword(dev, vsec + 0x34, &val); | |
260 | show_reg("Reserved", val); | |
261 | pci_read_config_dword(dev, vsec + 0x38, &val); | |
262 | show_reg("Reserved", val); | |
263 | pci_read_config_dword(dev, vsec + 0x3c, &val); | |
264 | show_reg("Reserved", val); | |
265 | ||
266 | pci_read_config_dword(dev, vsec + 0x40, &val); | |
267 | show_reg("PSL Programming Port", val); | |
268 | pci_read_config_dword(dev, vsec + 0x44, &val); | |
269 | show_reg("PSL Programming Control", val); | |
270 | ||
271 | pci_read_config_dword(dev, vsec + 0x48, &val); | |
272 | show_reg("Reserved", val); | |
273 | pci_read_config_dword(dev, vsec + 0x4c, &val); | |
274 | show_reg("Reserved", val); | |
275 | ||
276 | pci_read_config_dword(dev, vsec + 0x50, &val); | |
277 | show_reg("Flash Address Register", val); | |
278 | pci_read_config_dword(dev, vsec + 0x54, &val); | |
279 | show_reg("Flash Size Register", val); | |
280 | pci_read_config_dword(dev, vsec + 0x58, &val); | |
281 | show_reg("Flash Status/Control Register", val); | |
282 | pci_read_config_dword(dev, vsec + 0x58, &val); | |
283 | show_reg("Flash Data Port", val); | |
284 | ||
285 | #undef show_reg | |
286 | } | |
287 | ||
288 | static void dump_afu_descriptor(struct cxl_afu *afu) | |
289 | { | |
bfcdc8ff MN |
290 | u64 val, afu_cr_num, afu_cr_off, afu_cr_len; |
291 | int i; | |
f204e0b8 IM |
292 | |
293 | #define show_reg(name, what) \ | |
294 | dev_info(&afu->dev, "afu desc: %30s: %#llx\n", name, what) | |
295 | ||
296 | val = AFUD_READ_INFO(afu); | |
297 | show_reg("num_ints_per_process", AFUD_NUM_INTS_PER_PROC(val)); | |
298 | show_reg("num_of_processes", AFUD_NUM_PROCS(val)); | |
299 | show_reg("num_of_afu_CRs", AFUD_NUM_CRS(val)); | |
300 | show_reg("req_prog_mode", val & 0xffffULL); | |
bfcdc8ff | 301 | afu_cr_num = AFUD_NUM_CRS(val); |
f204e0b8 IM |
302 | |
303 | val = AFUD_READ(afu, 0x8); | |
304 | show_reg("Reserved", val); | |
305 | val = AFUD_READ(afu, 0x10); | |
306 | show_reg("Reserved", val); | |
307 | val = AFUD_READ(afu, 0x18); | |
308 | show_reg("Reserved", val); | |
309 | ||
310 | val = AFUD_READ_CR(afu); | |
311 | show_reg("Reserved", (val >> (63-7)) & 0xff); | |
312 | show_reg("AFU_CR_len", AFUD_CR_LEN(val)); | |
bfcdc8ff | 313 | afu_cr_len = AFUD_CR_LEN(val) * 256; |
f204e0b8 IM |
314 | |
315 | val = AFUD_READ_CR_OFF(afu); | |
bfcdc8ff | 316 | afu_cr_off = val; |
f204e0b8 IM |
317 | show_reg("AFU_CR_offset", val); |
318 | ||
319 | val = AFUD_READ_PPPSA(afu); | |
320 | show_reg("PerProcessPSA_control", (val >> (63-7)) & 0xff); | |
321 | show_reg("PerProcessPSA Length", AFUD_PPPSA_LEN(val)); | |
322 | ||
323 | val = AFUD_READ_PPPSA_OFF(afu); | |
324 | show_reg("PerProcessPSA_offset", val); | |
325 | ||
326 | val = AFUD_READ_EB(afu); | |
327 | show_reg("Reserved", (val >> (63-7)) & 0xff); | |
328 | show_reg("AFU_EB_len", AFUD_EB_LEN(val)); | |
329 | ||
330 | val = AFUD_READ_EB_OFF(afu); | |
331 | show_reg("AFU_EB_offset", val); | |
332 | ||
bfcdc8ff MN |
333 | for (i = 0; i < afu_cr_num; i++) { |
334 | val = AFUD_READ_LE(afu, afu_cr_off + i * afu_cr_len); | |
335 | show_reg("CR Vendor", val & 0xffff); | |
336 | show_reg("CR Device", (val >> 16) & 0xffff); | |
337 | } | |
f204e0b8 IM |
338 | #undef show_reg |
339 | } | |
340 | ||
341 | static int init_implementation_adapter_regs(struct cxl *adapter, struct pci_dev *dev) | |
342 | { | |
343 | struct device_node *np; | |
344 | const __be32 *prop; | |
345 | u64 psl_dsnctl; | |
346 | u64 chipid; | |
347 | ||
6f963ec2 | 348 | if (!(np = pnv_pci_get_phb_node(dev))) |
f204e0b8 IM |
349 | return -ENODEV; |
350 | ||
351 | while (np && !(prop = of_get_property(np, "ibm,chip-id", NULL))) | |
352 | np = of_get_next_parent(np); | |
353 | if (!np) | |
354 | return -ENODEV; | |
355 | chipid = be32_to_cpup(prop); | |
356 | of_node_put(np); | |
357 | ||
358 | /* Tell PSL where to route data to */ | |
359 | psl_dsnctl = 0x02E8900002000000ULL | (chipid << (63-5)); | |
360 | cxl_p1_write(adapter, CXL_PSL_DSNDCTL, psl_dsnctl); | |
361 | cxl_p1_write(adapter, CXL_PSL_RESLCKTO, 0x20000000200ULL); | |
362 | /* snoop write mask */ | |
363 | cxl_p1_write(adapter, CXL_PSL_SNWRALLOC, 0x00000000FFFFFFFFULL); | |
364 | /* set fir_accum */ | |
365 | cxl_p1_write(adapter, CXL_PSL_FIR_CNTL, 0x0800000000000000ULL); | |
366 | /* for debugging with trace arrays */ | |
367 | cxl_p1_write(adapter, CXL_PSL_TRACE, 0x0000FF7C00000000ULL); | |
368 | ||
369 | return 0; | |
370 | } | |
371 | ||
372 | static int init_implementation_afu_regs(struct cxl_afu *afu) | |
373 | { | |
374 | /* read/write masks for this slice */ | |
375 | cxl_p1n_write(afu, CXL_PSL_APCALLOC_A, 0xFFFFFFFEFEFEFEFEULL); | |
376 | /* APC read/write masks for this slice */ | |
377 | cxl_p1n_write(afu, CXL_PSL_COALLOC_A, 0xFF000000FEFEFEFEULL); | |
378 | /* for debugging with trace arrays */ | |
379 | cxl_p1n_write(afu, CXL_PSL_SLICE_TRACE, 0x0000FFFF00000000ULL); | |
d6a6af2c | 380 | cxl_p1n_write(afu, CXL_PSL_RXCTL_A, CXL_PSL_RXCTL_AFUHP_4S); |
f204e0b8 IM |
381 | |
382 | return 0; | |
383 | } | |
384 | ||
385 | int cxl_setup_irq(struct cxl *adapter, unsigned int hwirq, | |
386 | unsigned int virq) | |
387 | { | |
388 | struct pci_dev *dev = to_pci_dev(adapter->dev.parent); | |
389 | ||
390 | return pnv_cxl_ioda_msi_setup(dev, hwirq, virq); | |
391 | } | |
392 | ||
4beb5421 RG |
393 | int cxl_update_image_control(struct cxl *adapter) |
394 | { | |
395 | struct pci_dev *dev = to_pci_dev(adapter->dev.parent); | |
396 | int rc; | |
397 | int vsec; | |
398 | u8 image_state; | |
399 | ||
400 | if (!(vsec = find_cxl_vsec(dev))) { | |
401 | dev_err(&dev->dev, "ABORTING: CXL VSEC not found!\n"); | |
402 | return -ENODEV; | |
403 | } | |
404 | ||
405 | if ((rc = CXL_READ_VSEC_IMAGE_STATE(dev, vsec, &image_state))) { | |
406 | dev_err(&dev->dev, "failed to read image state: %i\n", rc); | |
407 | return rc; | |
408 | } | |
409 | ||
410 | if (adapter->perst_loads_image) | |
411 | image_state |= CXL_VSEC_PERST_LOADS_IMAGE; | |
412 | else | |
413 | image_state &= ~CXL_VSEC_PERST_LOADS_IMAGE; | |
414 | ||
415 | if (adapter->perst_select_user) | |
416 | image_state |= CXL_VSEC_PERST_SELECT_USER; | |
417 | else | |
418 | image_state &= ~CXL_VSEC_PERST_SELECT_USER; | |
419 | ||
420 | if ((rc = CXL_WRITE_VSEC_IMAGE_STATE(dev, vsec, image_state))) { | |
421 | dev_err(&dev->dev, "failed to update image control: %i\n", rc); | |
422 | return rc; | |
423 | } | |
424 | ||
425 | return 0; | |
426 | } | |
427 | ||
f204e0b8 IM |
428 | int cxl_alloc_one_irq(struct cxl *adapter) |
429 | { | |
430 | struct pci_dev *dev = to_pci_dev(adapter->dev.parent); | |
431 | ||
432 | return pnv_cxl_alloc_hwirqs(dev, 1); | |
433 | } | |
434 | ||
435 | void cxl_release_one_irq(struct cxl *adapter, int hwirq) | |
436 | { | |
437 | struct pci_dev *dev = to_pci_dev(adapter->dev.parent); | |
438 | ||
439 | return pnv_cxl_release_hwirqs(dev, hwirq, 1); | |
440 | } | |
441 | ||
442 | int cxl_alloc_irq_ranges(struct cxl_irq_ranges *irqs, struct cxl *adapter, unsigned int num) | |
443 | { | |
444 | struct pci_dev *dev = to_pci_dev(adapter->dev.parent); | |
445 | ||
446 | return pnv_cxl_alloc_hwirq_ranges(irqs, dev, num); | |
447 | } | |
448 | ||
449 | void cxl_release_irq_ranges(struct cxl_irq_ranges *irqs, struct cxl *adapter) | |
450 | { | |
451 | struct pci_dev *dev = to_pci_dev(adapter->dev.parent); | |
452 | ||
453 | pnv_cxl_release_hwirq_ranges(irqs, dev); | |
454 | } | |
455 | ||
456 | static int setup_cxl_bars(struct pci_dev *dev) | |
457 | { | |
458 | /* Safety check in case we get backported to < 3.17 without M64 */ | |
459 | if ((p1_base(dev) < 0x100000000ULL) || | |
460 | (p2_base(dev) < 0x100000000ULL)) { | |
461 | dev_err(&dev->dev, "ABORTING: M32 BAR assignment incompatible with CXL\n"); | |
462 | return -ENODEV; | |
463 | } | |
464 | ||
465 | /* | |
466 | * BAR 4/5 has a special meaning for CXL and must be programmed with a | |
467 | * special value corresponding to the CXL protocol address range. | |
468 | * For POWER 8 that means bits 48:49 must be set to 10 | |
469 | */ | |
470 | pci_write_config_dword(dev, PCI_BASE_ADDRESS_4, 0x00000000); | |
471 | pci_write_config_dword(dev, PCI_BASE_ADDRESS_5, 0x00020000); | |
472 | ||
473 | return 0; | |
474 | } | |
475 | ||
476 | /* pciex node: ibm,opal-m64-window = <0x3d058 0x0 0x3d058 0x0 0x8 0x0>; */ | |
477 | static int switch_card_to_cxl(struct pci_dev *dev) | |
478 | { | |
479 | int vsec; | |
480 | u8 val; | |
481 | int rc; | |
482 | ||
483 | dev_info(&dev->dev, "switch card to CXL\n"); | |
484 | ||
485 | if (!(vsec = find_cxl_vsec(dev))) { | |
486 | dev_err(&dev->dev, "ABORTING: CXL VSEC not found!\n"); | |
487 | return -ENODEV; | |
488 | } | |
489 | ||
490 | if ((rc = CXL_READ_VSEC_MODE_CONTROL(dev, vsec, &val))) { | |
491 | dev_err(&dev->dev, "failed to read current mode control: %i", rc); | |
492 | return rc; | |
493 | } | |
494 | val &= ~CXL_VSEC_PROTOCOL_MASK; | |
495 | val |= CXL_VSEC_PROTOCOL_256TB | CXL_VSEC_PROTOCOL_ENABLE; | |
496 | if ((rc = CXL_WRITE_VSEC_MODE_CONTROL(dev, vsec, val))) { | |
497 | dev_err(&dev->dev, "failed to enable CXL protocol: %i", rc); | |
498 | return rc; | |
499 | } | |
500 | /* | |
501 | * The CAIA spec (v0.12 11.6 Bi-modal Device Support) states | |
502 | * we must wait 100ms after this mode switch before touching | |
503 | * PCIe config space. | |
504 | */ | |
505 | msleep(100); | |
506 | ||
507 | return 0; | |
508 | } | |
509 | ||
510 | static int cxl_map_slice_regs(struct cxl_afu *afu, struct cxl *adapter, struct pci_dev *dev) | |
511 | { | |
512 | u64 p1n_base, p2n_base, afu_desc; | |
513 | const u64 p1n_size = 0x100; | |
514 | const u64 p2n_size = 0x1000; | |
515 | ||
516 | p1n_base = p1_base(dev) + 0x10000 + (afu->slice * p1n_size); | |
517 | p2n_base = p2_base(dev) + (afu->slice * p2n_size); | |
518 | afu->psn_phys = p2_base(dev) + (adapter->ps_off + (afu->slice * adapter->ps_size)); | |
519 | afu_desc = p2_base(dev) + adapter->afu_desc_off + (afu->slice * adapter->afu_desc_size); | |
520 | ||
521 | if (!(afu->p1n_mmio = ioremap(p1n_base, p1n_size))) | |
522 | goto err; | |
523 | if (!(afu->p2n_mmio = ioremap(p2n_base, p2n_size))) | |
524 | goto err1; | |
525 | if (afu_desc) { | |
526 | if (!(afu->afu_desc_mmio = ioremap(afu_desc, adapter->afu_desc_size))) | |
527 | goto err2; | |
528 | } | |
529 | ||
530 | return 0; | |
531 | err2: | |
532 | iounmap(afu->p2n_mmio); | |
533 | err1: | |
534 | iounmap(afu->p1n_mmio); | |
535 | err: | |
536 | dev_err(&afu->dev, "Error mapping AFU MMIO regions\n"); | |
537 | return -ENOMEM; | |
538 | } | |
539 | ||
540 | static void cxl_unmap_slice_regs(struct cxl_afu *afu) | |
541 | { | |
575e6986 | 542 | if (afu->p2n_mmio) { |
f204e0b8 | 543 | iounmap(afu->p2n_mmio); |
575e6986 DA |
544 | afu->p2n_mmio = NULL; |
545 | } | |
546 | if (afu->p1n_mmio) { | |
f204e0b8 | 547 | iounmap(afu->p1n_mmio); |
575e6986 DA |
548 | afu->p1n_mmio = NULL; |
549 | } | |
550 | if (afu->afu_desc_mmio) { | |
551 | iounmap(afu->afu_desc_mmio); | |
552 | afu->afu_desc_mmio = NULL; | |
553 | } | |
f204e0b8 IM |
554 | } |
555 | ||
556 | static void cxl_release_afu(struct device *dev) | |
557 | { | |
558 | struct cxl_afu *afu = to_cxl_afu(dev); | |
559 | ||
560 | pr_devel("cxl_release_afu\n"); | |
561 | ||
bd664f89 | 562 | idr_destroy(&afu->contexts_idr); |
05155772 DA |
563 | cxl_release_spa(afu); |
564 | ||
f204e0b8 IM |
565 | kfree(afu); |
566 | } | |
567 | ||
568 | static struct cxl_afu *cxl_alloc_afu(struct cxl *adapter, int slice) | |
569 | { | |
570 | struct cxl_afu *afu; | |
571 | ||
572 | if (!(afu = kzalloc(sizeof(struct cxl_afu), GFP_KERNEL))) | |
573 | return NULL; | |
574 | ||
575 | afu->adapter = adapter; | |
576 | afu->dev.parent = &adapter->dev; | |
577 | afu->dev.release = cxl_release_afu; | |
578 | afu->slice = slice; | |
579 | idr_init(&afu->contexts_idr); | |
ee41d11d | 580 | mutex_init(&afu->contexts_lock); |
f204e0b8 IM |
581 | spin_lock_init(&afu->afu_cntl_lock); |
582 | mutex_init(&afu->spa_mutex); | |
583 | ||
584 | afu->prefault_mode = CXL_PREFAULT_NONE; | |
585 | afu->irqs_max = afu->adapter->user_irqs; | |
586 | ||
587 | return afu; | |
588 | } | |
589 | ||
590 | /* Expects AFU struct to have recently been zeroed out */ | |
591 | static int cxl_read_afu_descriptor(struct cxl_afu *afu) | |
592 | { | |
593 | u64 val; | |
594 | ||
595 | val = AFUD_READ_INFO(afu); | |
596 | afu->pp_irqs = AFUD_NUM_INTS_PER_PROC(val); | |
597 | afu->max_procs_virtualised = AFUD_NUM_PROCS(val); | |
b087e619 | 598 | afu->crs_num = AFUD_NUM_CRS(val); |
f204e0b8 IM |
599 | |
600 | if (AFUD_AFU_DIRECTED(val)) | |
601 | afu->modes_supported |= CXL_MODE_DIRECTED; | |
602 | if (AFUD_DEDICATED_PROCESS(val)) | |
603 | afu->modes_supported |= CXL_MODE_DEDICATED; | |
604 | if (AFUD_TIME_SLICED(val)) | |
605 | afu->modes_supported |= CXL_MODE_TIME_SLICED; | |
606 | ||
607 | val = AFUD_READ_PPPSA(afu); | |
608 | afu->pp_size = AFUD_PPPSA_LEN(val) * 4096; | |
609 | afu->psa = AFUD_PPPSA_PSA(val); | |
610 | if ((afu->pp_psa = AFUD_PPPSA_PP(val))) | |
611 | afu->pp_offset = AFUD_READ_PPPSA_OFF(afu); | |
612 | ||
b087e619 IM |
613 | val = AFUD_READ_CR(afu); |
614 | afu->crs_len = AFUD_CR_LEN(val) * 256; | |
615 | afu->crs_offset = AFUD_READ_CR_OFF(afu); | |
616 | ||
e36f6fe1 VJ |
617 | |
618 | /* eb_len is in multiple of 4K */ | |
619 | afu->eb_len = AFUD_EB_LEN(AFUD_READ_EB(afu)) * 4096; | |
620 | afu->eb_offset = AFUD_READ_EB_OFF(afu); | |
621 | ||
622 | /* eb_off is 4K aligned so lower 12 bits are always zero */ | |
623 | if (EXTRACT_PPC_BITS(afu->eb_offset, 0, 11) != 0) { | |
624 | dev_warn(&afu->dev, | |
625 | "Invalid AFU error buffer offset %Lx\n", | |
626 | afu->eb_offset); | |
627 | dev_info(&afu->dev, | |
628 | "Ignoring AFU error buffer in the descriptor\n"); | |
629 | /* indicate that no afu buffer exists */ | |
630 | afu->eb_len = 0; | |
631 | } | |
632 | ||
f204e0b8 IM |
633 | return 0; |
634 | } | |
635 | ||
636 | static int cxl_afu_descriptor_looks_ok(struct cxl_afu *afu) | |
637 | { | |
3d5be039 IM |
638 | int i; |
639 | ||
f204e0b8 IM |
640 | if (afu->psa && afu->adapter->ps_size < |
641 | (afu->pp_offset + afu->pp_size*afu->max_procs_virtualised)) { | |
642 | dev_err(&afu->dev, "per-process PSA can't fit inside the PSA!\n"); | |
643 | return -ENODEV; | |
644 | } | |
645 | ||
646 | if (afu->pp_psa && (afu->pp_size < PAGE_SIZE)) | |
647 | dev_warn(&afu->dev, "AFU uses < PAGE_SIZE per-process PSA!"); | |
648 | ||
3d5be039 IM |
649 | for (i = 0; i < afu->crs_num; i++) { |
650 | if ((cxl_afu_cr_read32(afu, i, 0) == 0)) { | |
651 | dev_err(&afu->dev, "ABORTING: AFU configuration record %i is invalid\n", i); | |
652 | return -EINVAL; | |
653 | } | |
654 | } | |
655 | ||
f204e0b8 IM |
656 | return 0; |
657 | } | |
658 | ||
659 | static int sanitise_afu_regs(struct cxl_afu *afu) | |
660 | { | |
661 | u64 reg; | |
662 | ||
663 | /* | |
664 | * Clear out any regs that contain either an IVTE or address or may be | |
665 | * waiting on an acknowledgement to try to be a bit safer as we bring | |
666 | * it online | |
667 | */ | |
668 | reg = cxl_p2n_read(afu, CXL_AFU_Cntl_An); | |
669 | if ((reg & CXL_AFU_Cntl_An_ES_MASK) != CXL_AFU_Cntl_An_ES_Disabled) { | |
de369538 | 670 | dev_warn(&afu->dev, "WARNING: AFU was not disabled: %#016llx\n", reg); |
b12994fb | 671 | if (__cxl_afu_reset(afu)) |
f204e0b8 IM |
672 | return -EIO; |
673 | if (cxl_afu_disable(afu)) | |
674 | return -EIO; | |
675 | if (cxl_psl_purge(afu)) | |
676 | return -EIO; | |
677 | } | |
678 | cxl_p1n_write(afu, CXL_PSL_SPAP_An, 0x0000000000000000); | |
679 | cxl_p1n_write(afu, CXL_PSL_IVTE_Limit_An, 0x0000000000000000); | |
680 | cxl_p1n_write(afu, CXL_PSL_IVTE_Offset_An, 0x0000000000000000); | |
681 | cxl_p1n_write(afu, CXL_PSL_AMBAR_An, 0x0000000000000000); | |
682 | cxl_p1n_write(afu, CXL_PSL_SPOffset_An, 0x0000000000000000); | |
683 | cxl_p1n_write(afu, CXL_HAURP_An, 0x0000000000000000); | |
684 | cxl_p2n_write(afu, CXL_CSRP_An, 0x0000000000000000); | |
685 | cxl_p2n_write(afu, CXL_AURP1_An, 0x0000000000000000); | |
686 | cxl_p2n_write(afu, CXL_AURP0_An, 0x0000000000000000); | |
687 | cxl_p2n_write(afu, CXL_SSTP1_An, 0x0000000000000000); | |
688 | cxl_p2n_write(afu, CXL_SSTP0_An, 0x0000000000000000); | |
689 | reg = cxl_p2n_read(afu, CXL_PSL_DSISR_An); | |
690 | if (reg) { | |
de369538 | 691 | dev_warn(&afu->dev, "AFU had pending DSISR: %#016llx\n", reg); |
f204e0b8 IM |
692 | if (reg & CXL_PSL_DSISR_TRANS) |
693 | cxl_p2n_write(afu, CXL_PSL_TFC_An, CXL_PSL_TFC_An_AE); | |
694 | else | |
695 | cxl_p2n_write(afu, CXL_PSL_TFC_An, CXL_PSL_TFC_An_A); | |
696 | } | |
697 | reg = cxl_p1n_read(afu, CXL_PSL_SERR_An); | |
698 | if (reg) { | |
699 | if (reg & ~0xffff) | |
de369538 | 700 | dev_warn(&afu->dev, "AFU had pending SERR: %#016llx\n", reg); |
f204e0b8 IM |
701 | cxl_p1n_write(afu, CXL_PSL_SERR_An, reg & ~0xffff); |
702 | } | |
703 | reg = cxl_p2n_read(afu, CXL_PSL_ErrStat_An); | |
704 | if (reg) { | |
de369538 | 705 | dev_warn(&afu->dev, "AFU had pending error status: %#016llx\n", reg); |
f204e0b8 IM |
706 | cxl_p2n_write(afu, CXL_PSL_ErrStat_An, reg); |
707 | } | |
708 | ||
709 | return 0; | |
710 | } | |
711 | ||
e36f6fe1 VJ |
712 | #define ERR_BUFF_MAX_COPY_SIZE PAGE_SIZE |
713 | /* | |
714 | * afu_eb_read: | |
715 | * Called from sysfs and reads the afu error info buffer. The h/w only supports | |
716 | * 4/8 bytes aligned access. So in case the requested offset/count arent 8 byte | |
717 | * aligned the function uses a bounce buffer which can be max PAGE_SIZE. | |
718 | */ | |
719 | ssize_t cxl_afu_read_err_buffer(struct cxl_afu *afu, char *buf, | |
720 | loff_t off, size_t count) | |
721 | { | |
722 | loff_t aligned_start, aligned_end; | |
723 | size_t aligned_length; | |
724 | void *tbuf; | |
725 | const void __iomem *ebuf = afu->afu_desc_mmio + afu->eb_offset; | |
726 | ||
727 | if (count == 0 || off < 0 || (size_t)off >= afu->eb_len) | |
728 | return 0; | |
729 | ||
730 | /* calculate aligned read window */ | |
731 | count = min((size_t)(afu->eb_len - off), count); | |
732 | aligned_start = round_down(off, 8); | |
733 | aligned_end = round_up(off + count, 8); | |
734 | aligned_length = aligned_end - aligned_start; | |
735 | ||
736 | /* max we can copy in one read is PAGE_SIZE */ | |
737 | if (aligned_length > ERR_BUFF_MAX_COPY_SIZE) { | |
738 | aligned_length = ERR_BUFF_MAX_COPY_SIZE; | |
739 | count = ERR_BUFF_MAX_COPY_SIZE - (off & 0x7); | |
740 | } | |
741 | ||
742 | /* use bounce buffer for copy */ | |
743 | tbuf = (void *)__get_free_page(GFP_TEMPORARY); | |
744 | if (!tbuf) | |
745 | return -ENOMEM; | |
746 | ||
747 | /* perform aligned read from the mmio region */ | |
748 | memcpy_fromio(tbuf, ebuf + aligned_start, aligned_length); | |
749 | memcpy(buf, tbuf + (off & 0x7), count); | |
750 | ||
751 | free_page((unsigned long)tbuf); | |
752 | ||
753 | return count; | |
754 | } | |
755 | ||
d76427b0 | 756 | static int cxl_configure_afu(struct cxl_afu *afu, struct cxl *adapter, struct pci_dev *dev) |
f204e0b8 | 757 | { |
f204e0b8 IM |
758 | int rc; |
759 | ||
f204e0b8 | 760 | if ((rc = cxl_map_slice_regs(afu, adapter, dev))) |
d76427b0 | 761 | return rc; |
f204e0b8 IM |
762 | |
763 | if ((rc = sanitise_afu_regs(afu))) | |
d76427b0 | 764 | goto err1; |
f204e0b8 IM |
765 | |
766 | /* We need to reset the AFU before we can read the AFU descriptor */ | |
b12994fb | 767 | if ((rc = __cxl_afu_reset(afu))) |
d76427b0 | 768 | goto err1; |
f204e0b8 IM |
769 | |
770 | if (cxl_verbose) | |
771 | dump_afu_descriptor(afu); | |
772 | ||
773 | if ((rc = cxl_read_afu_descriptor(afu))) | |
d76427b0 | 774 | goto err1; |
f204e0b8 IM |
775 | |
776 | if ((rc = cxl_afu_descriptor_looks_ok(afu))) | |
d76427b0 | 777 | goto err1; |
f204e0b8 IM |
778 | |
779 | if ((rc = init_implementation_afu_regs(afu))) | |
d76427b0 | 780 | goto err1; |
f204e0b8 IM |
781 | |
782 | if ((rc = cxl_register_serr_irq(afu))) | |
d76427b0 | 783 | goto err1; |
f204e0b8 IM |
784 | |
785 | if ((rc = cxl_register_psl_irq(afu))) | |
d76427b0 DA |
786 | goto err2; |
787 | ||
788 | return 0; | |
789 | ||
790 | err2: | |
791 | cxl_release_serr_irq(afu); | |
792 | err1: | |
793 | cxl_unmap_slice_regs(afu); | |
794 | return rc; | |
795 | } | |
796 | ||
797 | static void cxl_deconfigure_afu(struct cxl_afu *afu) | |
798 | { | |
799 | cxl_release_psl_irq(afu); | |
800 | cxl_release_serr_irq(afu); | |
801 | cxl_unmap_slice_regs(afu); | |
802 | } | |
803 | ||
804 | static int cxl_init_afu(struct cxl *adapter, int slice, struct pci_dev *dev) | |
805 | { | |
806 | struct cxl_afu *afu; | |
807 | int rc; | |
808 | ||
809 | afu = cxl_alloc_afu(adapter, slice); | |
810 | if (!afu) | |
811 | return -ENOMEM; | |
812 | ||
813 | rc = dev_set_name(&afu->dev, "afu%i.%i", adapter->adapter_num, slice); | |
814 | if (rc) | |
815 | goto err_free; | |
816 | ||
817 | rc = cxl_configure_afu(afu, adapter, dev); | |
818 | if (rc) | |
819 | goto err_free; | |
f204e0b8 IM |
820 | |
821 | /* Don't care if this fails */ | |
822 | cxl_debugfs_afu_add(afu); | |
823 | ||
824 | /* | |
825 | * After we call this function we must not free the afu directly, even | |
826 | * if it returns an error! | |
827 | */ | |
828 | if ((rc = cxl_register_afu(afu))) | |
829 | goto err_put1; | |
830 | ||
831 | if ((rc = cxl_sysfs_afu_add(afu))) | |
832 | goto err_put1; | |
833 | ||
f204e0b8 IM |
834 | adapter->afu[afu->slice] = afu; |
835 | ||
6f7f0b3d MN |
836 | if ((rc = cxl_pci_vphb_add(afu))) |
837 | dev_info(&afu->dev, "Can't register vPHB\n"); | |
838 | ||
f204e0b8 IM |
839 | return 0; |
840 | ||
f204e0b8 | 841 | err_put1: |
d76427b0 | 842 | cxl_deconfigure_afu(afu); |
f204e0b8 | 843 | cxl_debugfs_afu_remove(afu); |
d76427b0 | 844 | device_unregister(&afu->dev); |
f204e0b8 | 845 | return rc; |
d76427b0 DA |
846 | |
847 | err_free: | |
848 | kfree(afu); | |
849 | return rc; | |
850 | ||
f204e0b8 IM |
851 | } |
852 | ||
853 | static void cxl_remove_afu(struct cxl_afu *afu) | |
854 | { | |
855 | pr_devel("cxl_remove_afu\n"); | |
856 | ||
857 | if (!afu) | |
858 | return; | |
859 | ||
860 | cxl_sysfs_afu_remove(afu); | |
861 | cxl_debugfs_afu_remove(afu); | |
862 | ||
863 | spin_lock(&afu->adapter->afu_list_lock); | |
864 | afu->adapter->afu[afu->slice] = NULL; | |
865 | spin_unlock(&afu->adapter->afu_list_lock); | |
866 | ||
867 | cxl_context_detach_all(afu); | |
868 | cxl_afu_deactivate_mode(afu); | |
869 | ||
d76427b0 | 870 | cxl_deconfigure_afu(afu); |
f204e0b8 IM |
871 | device_unregister(&afu->dev); |
872 | } | |
873 | ||
62fa19d4 RG |
874 | int cxl_reset(struct cxl *adapter) |
875 | { | |
876 | struct pci_dev *dev = to_pci_dev(adapter->dev.parent); | |
877 | int rc; | |
878 | int i; | |
879 | u32 val; | |
880 | ||
881 | dev_info(&dev->dev, "CXL reset\n"); | |
882 | ||
62fa19d4 RG |
883 | /* pcie_warm_reset requests a fundamental pci reset which includes a |
884 | * PERST assert/deassert. PERST triggers a loading of the image | |
885 | * if "user" or "factory" is selected in sysfs */ | |
886 | if ((rc = pci_set_pcie_reset_state(dev, pcie_warm_reset))) { | |
887 | dev_err(&dev->dev, "cxl: pcie_warm_reset failed\n"); | |
888 | return rc; | |
889 | } | |
890 | ||
891 | /* the PERST done above fences the PHB. So, reset depends on EEH | |
892 | * to unbind the driver, tell Sapphire to reinit the PHB, and rebind | |
893 | * the driver. Do an mmio read explictly to ensure EEH notices the | |
894 | * fenced PHB. Retry for a few seconds before giving up. */ | |
895 | i = 0; | |
896 | while (((val = mmio_read32be(adapter->p1_mmio)) != 0xffffffff) && | |
897 | (i < 5)) { | |
898 | msleep(500); | |
899 | i++; | |
900 | } | |
901 | ||
902 | if (val != 0xffffffff) | |
903 | dev_err(&dev->dev, "cxl: PERST failed to trigger EEH\n"); | |
904 | ||
905 | return rc; | |
906 | } | |
f204e0b8 IM |
907 | |
908 | static int cxl_map_adapter_regs(struct cxl *adapter, struct pci_dev *dev) | |
909 | { | |
910 | if (pci_request_region(dev, 2, "priv 2 regs")) | |
911 | goto err1; | |
912 | if (pci_request_region(dev, 0, "priv 1 regs")) | |
913 | goto err2; | |
914 | ||
de369538 | 915 | pr_devel("cxl_map_adapter_regs: p1: %#016llx %#llx, p2: %#016llx %#llx", |
f204e0b8 IM |
916 | p1_base(dev), p1_size(dev), p2_base(dev), p2_size(dev)); |
917 | ||
918 | if (!(adapter->p1_mmio = ioremap(p1_base(dev), p1_size(dev)))) | |
919 | goto err3; | |
920 | ||
921 | if (!(adapter->p2_mmio = ioremap(p2_base(dev), p2_size(dev)))) | |
922 | goto err4; | |
923 | ||
924 | return 0; | |
925 | ||
926 | err4: | |
927 | iounmap(adapter->p1_mmio); | |
928 | adapter->p1_mmio = NULL; | |
929 | err3: | |
930 | pci_release_region(dev, 0); | |
931 | err2: | |
932 | pci_release_region(dev, 2); | |
933 | err1: | |
934 | return -ENOMEM; | |
935 | } | |
936 | ||
937 | static void cxl_unmap_adapter_regs(struct cxl *adapter) | |
938 | { | |
575e6986 | 939 | if (adapter->p1_mmio) { |
f204e0b8 | 940 | iounmap(adapter->p1_mmio); |
575e6986 DA |
941 | adapter->p1_mmio = NULL; |
942 | pci_release_region(to_pci_dev(adapter->dev.parent), 2); | |
943 | } | |
944 | if (adapter->p2_mmio) { | |
f204e0b8 | 945 | iounmap(adapter->p2_mmio); |
575e6986 DA |
946 | adapter->p2_mmio = NULL; |
947 | pci_release_region(to_pci_dev(adapter->dev.parent), 0); | |
948 | } | |
f204e0b8 IM |
949 | } |
950 | ||
951 | static int cxl_read_vsec(struct cxl *adapter, struct pci_dev *dev) | |
952 | { | |
953 | int vsec; | |
954 | u32 afu_desc_off, afu_desc_size; | |
955 | u32 ps_off, ps_size; | |
956 | u16 vseclen; | |
957 | u8 image_state; | |
958 | ||
959 | if (!(vsec = find_cxl_vsec(dev))) { | |
bee30c70 | 960 | dev_err(&dev->dev, "ABORTING: CXL VSEC not found!\n"); |
f204e0b8 IM |
961 | return -ENODEV; |
962 | } | |
963 | ||
964 | CXL_READ_VSEC_LENGTH(dev, vsec, &vseclen); | |
965 | if (vseclen < CXL_VSEC_MIN_SIZE) { | |
bee30c70 | 966 | dev_err(&dev->dev, "ABORTING: CXL VSEC too short\n"); |
f204e0b8 IM |
967 | return -EINVAL; |
968 | } | |
969 | ||
970 | CXL_READ_VSEC_STATUS(dev, vsec, &adapter->vsec_status); | |
971 | CXL_READ_VSEC_PSL_REVISION(dev, vsec, &adapter->psl_rev); | |
972 | CXL_READ_VSEC_CAIA_MAJOR(dev, vsec, &adapter->caia_major); | |
973 | CXL_READ_VSEC_CAIA_MINOR(dev, vsec, &adapter->caia_minor); | |
974 | CXL_READ_VSEC_BASE_IMAGE(dev, vsec, &adapter->base_image); | |
975 | CXL_READ_VSEC_IMAGE_STATE(dev, vsec, &image_state); | |
976 | adapter->user_image_loaded = !!(image_state & CXL_VSEC_USER_IMAGE_LOADED); | |
4beb5421 | 977 | adapter->perst_select_user = !!(image_state & CXL_VSEC_USER_IMAGE_LOADED); |
f204e0b8 IM |
978 | |
979 | CXL_READ_VSEC_NAFUS(dev, vsec, &adapter->slices); | |
980 | CXL_READ_VSEC_AFU_DESC_OFF(dev, vsec, &afu_desc_off); | |
981 | CXL_READ_VSEC_AFU_DESC_SIZE(dev, vsec, &afu_desc_size); | |
982 | CXL_READ_VSEC_PS_OFF(dev, vsec, &ps_off); | |
983 | CXL_READ_VSEC_PS_SIZE(dev, vsec, &ps_size); | |
984 | ||
985 | /* Convert everything to bytes, because there is NO WAY I'd look at the | |
986 | * code a month later and forget what units these are in ;-) */ | |
987 | adapter->ps_off = ps_off * 64 * 1024; | |
988 | adapter->ps_size = ps_size * 64 * 1024; | |
989 | adapter->afu_desc_off = afu_desc_off * 64 * 1024; | |
990 | adapter->afu_desc_size = afu_desc_size *64 * 1024; | |
991 | ||
992 | /* Total IRQs - 1 PSL ERROR - #AFU*(1 slice error + 1 DSI) */ | |
993 | adapter->user_irqs = pnv_cxl_get_irq_count(dev) - 1 - 2*adapter->slices; | |
994 | ||
995 | return 0; | |
996 | } | |
997 | ||
998 | static int cxl_vsec_looks_ok(struct cxl *adapter, struct pci_dev *dev) | |
999 | { | |
1000 | if (adapter->vsec_status & CXL_STATUS_SECOND_PORT) | |
1001 | return -EBUSY; | |
1002 | ||
1003 | if (adapter->vsec_status & CXL_UNSUPPORTED_FEATURES) { | |
bee30c70 | 1004 | dev_err(&dev->dev, "ABORTING: CXL requires unsupported features\n"); |
f204e0b8 IM |
1005 | return -EINVAL; |
1006 | } | |
1007 | ||
1008 | if (!adapter->slices) { | |
1009 | /* Once we support dynamic reprogramming we can use the card if | |
1010 | * it supports loadable AFUs */ | |
bee30c70 | 1011 | dev_err(&dev->dev, "ABORTING: Device has no AFUs\n"); |
f204e0b8 IM |
1012 | return -EINVAL; |
1013 | } | |
1014 | ||
1015 | if (!adapter->afu_desc_off || !adapter->afu_desc_size) { | |
bee30c70 | 1016 | dev_err(&dev->dev, "ABORTING: VSEC shows no AFU descriptors\n"); |
f204e0b8 IM |
1017 | return -EINVAL; |
1018 | } | |
1019 | ||
1020 | if (adapter->ps_size > p2_size(dev) - adapter->ps_off) { | |
bee30c70 | 1021 | dev_err(&dev->dev, "ABORTING: Problem state size larger than " |
f204e0b8 IM |
1022 | "available in BAR2: 0x%llx > 0x%llx\n", |
1023 | adapter->ps_size, p2_size(dev) - adapter->ps_off); | |
1024 | return -EINVAL; | |
1025 | } | |
1026 | ||
1027 | return 0; | |
1028 | } | |
1029 | ||
1030 | static void cxl_release_adapter(struct device *dev) | |
1031 | { | |
1032 | struct cxl *adapter = to_cxl_adapter(dev); | |
1033 | ||
1034 | pr_devel("cxl_release_adapter\n"); | |
1035 | ||
c044c415 DA |
1036 | cxl_remove_adapter_nr(adapter); |
1037 | ||
f204e0b8 IM |
1038 | kfree(adapter); |
1039 | } | |
1040 | ||
c044c415 | 1041 | static struct cxl *cxl_alloc_adapter(void) |
f204e0b8 IM |
1042 | { |
1043 | struct cxl *adapter; | |
1044 | ||
1045 | if (!(adapter = kzalloc(sizeof(struct cxl), GFP_KERNEL))) | |
1046 | return NULL; | |
1047 | ||
f204e0b8 IM |
1048 | spin_lock_init(&adapter->afu_list_lock); |
1049 | ||
c044c415 DA |
1050 | if (cxl_alloc_adapter_nr(adapter)) |
1051 | goto err1; | |
1052 | ||
1053 | if (dev_set_name(&adapter->dev, "card%i", adapter->adapter_num)) | |
1054 | goto err2; | |
1055 | ||
f204e0b8 | 1056 | return adapter; |
c044c415 DA |
1057 | |
1058 | err2: | |
1059 | cxl_remove_adapter_nr(adapter); | |
1060 | err1: | |
1061 | kfree(adapter); | |
1062 | return NULL; | |
f204e0b8 IM |
1063 | } |
1064 | ||
1065 | static int sanitise_adapter_regs(struct cxl *adapter) | |
1066 | { | |
1067 | cxl_p1_write(adapter, CXL_PSL_ErrIVTE, 0x0000000000000000); | |
1068 | return cxl_tlb_slb_invalidate(adapter); | |
1069 | } | |
1070 | ||
c044c415 DA |
1071 | /* This should contain *only* operations that can safely be done in |
1072 | * both creation and recovery. | |
1073 | */ | |
1074 | static int cxl_configure_adapter(struct cxl *adapter, struct pci_dev *dev) | |
f204e0b8 | 1075 | { |
f204e0b8 IM |
1076 | int rc; |
1077 | ||
c044c415 DA |
1078 | adapter->dev.parent = &dev->dev; |
1079 | adapter->dev.release = cxl_release_adapter; | |
1080 | pci_set_drvdata(dev, adapter); | |
f204e0b8 | 1081 | |
c044c415 DA |
1082 | rc = pci_enable_device(dev); |
1083 | if (rc) { | |
1084 | dev_err(&dev->dev, "pci_enable_device failed: %i\n", rc); | |
1085 | return rc; | |
1086 | } | |
f204e0b8 | 1087 | |
bee30c70 | 1088 | if ((rc = cxl_read_vsec(adapter, dev))) |
c044c415 | 1089 | return rc; |
bee30c70 IM |
1090 | |
1091 | if ((rc = cxl_vsec_looks_ok(adapter, dev))) | |
c044c415 | 1092 | return rc; |
bee30c70 IM |
1093 | |
1094 | if ((rc = setup_cxl_bars(dev))) | |
c044c415 | 1095 | return rc; |
bee30c70 | 1096 | |
f204e0b8 | 1097 | if ((rc = switch_card_to_cxl(dev))) |
c044c415 | 1098 | return rc; |
f204e0b8 | 1099 | |
4beb5421 | 1100 | if ((rc = cxl_update_image_control(adapter))) |
c044c415 | 1101 | return rc; |
4beb5421 | 1102 | |
f204e0b8 | 1103 | if ((rc = cxl_map_adapter_regs(adapter, dev))) |
c044c415 | 1104 | return rc; |
f204e0b8 IM |
1105 | |
1106 | if ((rc = sanitise_adapter_regs(adapter))) | |
c044c415 | 1107 | goto err; |
f204e0b8 IM |
1108 | |
1109 | if ((rc = init_implementation_adapter_regs(adapter, dev))) | |
c044c415 | 1110 | goto err; |
f204e0b8 | 1111 | |
1212aa1c | 1112 | if ((rc = pnv_phb_to_cxl_mode(dev, OPAL_PHB_CAPI_MODE_CAPI))) |
c044c415 | 1113 | goto err; |
f204e0b8 | 1114 | |
1212aa1c RG |
1115 | /* If recovery happened, the last step is to turn on snooping. |
1116 | * In the non-recovery case this has no effect */ | |
c044c415 DA |
1117 | if ((rc = pnv_phb_to_cxl_mode(dev, OPAL_PHB_CAPI_MODE_SNOOP_ON))) |
1118 | goto err; | |
1212aa1c | 1119 | |
f204e0b8 | 1120 | if ((rc = cxl_register_psl_err_irq(adapter))) |
c044c415 DA |
1121 | goto err; |
1122 | ||
1123 | return 0; | |
1124 | ||
1125 | err: | |
1126 | cxl_unmap_adapter_regs(adapter); | |
1127 | return rc; | |
1128 | ||
1129 | } | |
1130 | ||
1131 | static void cxl_deconfigure_adapter(struct cxl *adapter) | |
1132 | { | |
1133 | struct pci_dev *pdev = to_pci_dev(adapter->dev.parent); | |
1134 | ||
1135 | cxl_release_psl_err_irq(adapter); | |
1136 | cxl_unmap_adapter_regs(adapter); | |
1137 | ||
1138 | pci_disable_device(pdev); | |
1139 | } | |
1140 | ||
1141 | static struct cxl *cxl_init_adapter(struct pci_dev *dev) | |
1142 | { | |
1143 | struct cxl *adapter; | |
1144 | int rc; | |
1145 | ||
1146 | adapter = cxl_alloc_adapter(); | |
1147 | if (!adapter) | |
1148 | return ERR_PTR(-ENOMEM); | |
1149 | ||
1150 | /* Set defaults for parameters which need to persist over | |
1151 | * configure/reconfigure | |
1152 | */ | |
1153 | adapter->perst_loads_image = true; | |
1154 | ||
1155 | rc = cxl_configure_adapter(adapter, dev); | |
1156 | if (rc) { | |
1157 | pci_disable_device(dev); | |
1158 | cxl_release_adapter(&adapter->dev); | |
1159 | return ERR_PTR(rc); | |
1160 | } | |
f204e0b8 IM |
1161 | |
1162 | /* Don't care if this one fails: */ | |
1163 | cxl_debugfs_adapter_add(adapter); | |
1164 | ||
1165 | /* | |
1166 | * After we call this function we must not free the adapter directly, | |
1167 | * even if it returns an error! | |
1168 | */ | |
1169 | if ((rc = cxl_register_adapter(adapter))) | |
1170 | goto err_put1; | |
1171 | ||
1172 | if ((rc = cxl_sysfs_adapter_add(adapter))) | |
1173 | goto err_put1; | |
1174 | ||
1175 | return adapter; | |
1176 | ||
1177 | err_put1: | |
c044c415 DA |
1178 | /* This should mirror cxl_remove_adapter, except without the |
1179 | * sysfs parts | |
1180 | */ | |
f204e0b8 | 1181 | cxl_debugfs_adapter_remove(adapter); |
c044c415 DA |
1182 | cxl_deconfigure_adapter(adapter); |
1183 | device_unregister(&adapter->dev); | |
f204e0b8 IM |
1184 | return ERR_PTR(rc); |
1185 | } | |
1186 | ||
1187 | static void cxl_remove_adapter(struct cxl *adapter) | |
1188 | { | |
c044c415 | 1189 | pr_devel("cxl_remove_adapter\n"); |
f204e0b8 IM |
1190 | |
1191 | cxl_sysfs_adapter_remove(adapter); | |
1192 | cxl_debugfs_adapter_remove(adapter); | |
f204e0b8 | 1193 | |
c044c415 | 1194 | cxl_deconfigure_adapter(adapter); |
f204e0b8 | 1195 | |
c044c415 | 1196 | device_unregister(&adapter->dev); |
f204e0b8 IM |
1197 | } |
1198 | ||
1199 | static int cxl_probe(struct pci_dev *dev, const struct pci_device_id *id) | |
1200 | { | |
1201 | struct cxl *adapter; | |
1202 | int slice; | |
1203 | int rc; | |
1204 | ||
1205 | pci_dev_get(dev); | |
1206 | ||
1207 | if (cxl_verbose) | |
1208 | dump_cxl_config_space(dev); | |
1209 | ||
f204e0b8 IM |
1210 | adapter = cxl_init_adapter(dev); |
1211 | if (IS_ERR(adapter)) { | |
1212 | dev_err(&dev->dev, "cxl_init_adapter failed: %li\n", PTR_ERR(adapter)); | |
1213 | return PTR_ERR(adapter); | |
1214 | } | |
1215 | ||
1216 | for (slice = 0; slice < adapter->slices; slice++) { | |
d76427b0 | 1217 | if ((rc = cxl_init_afu(adapter, slice, dev))) { |
f204e0b8 | 1218 | dev_err(&dev->dev, "AFU %i failed to initialise: %i\n", slice, rc); |
d76427b0 DA |
1219 | continue; |
1220 | } | |
1221 | ||
1222 | rc = cxl_afu_select_best_mode(adapter->afu[slice]); | |
1223 | if (rc) | |
1224 | dev_err(&dev->dev, "AFU %i failed to start: %i\n", slice, rc); | |
f204e0b8 IM |
1225 | } |
1226 | ||
1227 | return 0; | |
1228 | } | |
1229 | ||
1230 | static void cxl_remove(struct pci_dev *dev) | |
1231 | { | |
1232 | struct cxl *adapter = pci_get_drvdata(dev); | |
6f7f0b3d MN |
1233 | struct cxl_afu *afu; |
1234 | int i; | |
f204e0b8 | 1235 | |
f204e0b8 IM |
1236 | /* |
1237 | * Lock to prevent someone grabbing a ref through the adapter list as | |
1238 | * we are removing it | |
1239 | */ | |
6f7f0b3d MN |
1240 | for (i = 0; i < adapter->slices; i++) { |
1241 | afu = adapter->afu[i]; | |
1242 | cxl_pci_vphb_remove(afu); | |
1243 | cxl_remove_afu(afu); | |
1244 | } | |
f204e0b8 IM |
1245 | cxl_remove_adapter(adapter); |
1246 | } | |
1247 | ||
1248 | struct pci_driver cxl_pci_driver = { | |
1249 | .name = "cxl-pci", | |
1250 | .id_table = cxl_pci_tbl, | |
1251 | .probe = cxl_probe, | |
1252 | .remove = cxl_remove, | |
aa70775e | 1253 | .shutdown = cxl_remove, |
f204e0b8 | 1254 | }; |