Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 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> |
Ryan Grimm | 62fa19d | 2015-01-19 11:52:51 -0600 | [diff] [blame] | 24 | #include <asm/io.h> |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 25 | |
| 26 | #include "cxl.h" |
Daniel Axtens | 9e8df8a | 2015-08-14 17:41:26 +1000 | [diff] [blame] | 27 | #include <misc/cxl.h> |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 28 | |
| 29 | |
| 30 | #define CXL_PCI_VSEC_ID 0x1280 |
| 31 | #define CXL_VSEC_MIN_SIZE 0x80 |
| 32 | |
| 33 | #define CXL_READ_VSEC_LENGTH(dev, vsec, dest) \ |
| 34 | { \ |
| 35 | pci_read_config_word(dev, vsec + 0x6, dest); \ |
| 36 | *dest >>= 4; \ |
| 37 | } |
| 38 | #define CXL_READ_VSEC_NAFUS(dev, vsec, dest) \ |
| 39 | pci_read_config_byte(dev, vsec + 0x8, dest) |
| 40 | |
| 41 | #define CXL_READ_VSEC_STATUS(dev, vsec, dest) \ |
| 42 | pci_read_config_byte(dev, vsec + 0x9, dest) |
| 43 | #define CXL_STATUS_SECOND_PORT 0x80 |
| 44 | #define CXL_STATUS_MSI_X_FULL 0x40 |
| 45 | #define CXL_STATUS_MSI_X_SINGLE 0x20 |
| 46 | #define CXL_STATUS_FLASH_RW 0x08 |
| 47 | #define CXL_STATUS_FLASH_RO 0x04 |
| 48 | #define CXL_STATUS_LOADABLE_AFU 0x02 |
| 49 | #define CXL_STATUS_LOADABLE_PSL 0x01 |
| 50 | /* If we see these features we won't try to use the card */ |
| 51 | #define CXL_UNSUPPORTED_FEATURES \ |
| 52 | (CXL_STATUS_MSI_X_FULL | CXL_STATUS_MSI_X_SINGLE) |
| 53 | |
| 54 | #define CXL_READ_VSEC_MODE_CONTROL(dev, vsec, dest) \ |
| 55 | pci_read_config_byte(dev, vsec + 0xa, dest) |
| 56 | #define CXL_WRITE_VSEC_MODE_CONTROL(dev, vsec, val) \ |
| 57 | pci_write_config_byte(dev, vsec + 0xa, val) |
| 58 | #define CXL_VSEC_PROTOCOL_MASK 0xe0 |
| 59 | #define CXL_VSEC_PROTOCOL_1024TB 0x80 |
| 60 | #define CXL_VSEC_PROTOCOL_512TB 0x40 |
| 61 | #define CXL_VSEC_PROTOCOL_256TB 0x20 /* Power 8 uses this */ |
| 62 | #define CXL_VSEC_PROTOCOL_ENABLE 0x01 |
| 63 | |
| 64 | #define CXL_READ_VSEC_PSL_REVISION(dev, vsec, dest) \ |
| 65 | pci_read_config_word(dev, vsec + 0xc, dest) |
| 66 | #define CXL_READ_VSEC_CAIA_MINOR(dev, vsec, dest) \ |
| 67 | pci_read_config_byte(dev, vsec + 0xe, dest) |
| 68 | #define CXL_READ_VSEC_CAIA_MAJOR(dev, vsec, dest) \ |
| 69 | pci_read_config_byte(dev, vsec + 0xf, dest) |
| 70 | #define CXL_READ_VSEC_BASE_IMAGE(dev, vsec, dest) \ |
| 71 | pci_read_config_word(dev, vsec + 0x10, dest) |
| 72 | |
| 73 | #define CXL_READ_VSEC_IMAGE_STATE(dev, vsec, dest) \ |
| 74 | pci_read_config_byte(dev, vsec + 0x13, dest) |
| 75 | #define CXL_WRITE_VSEC_IMAGE_STATE(dev, vsec, val) \ |
| 76 | pci_write_config_byte(dev, vsec + 0x13, val) |
| 77 | #define CXL_VSEC_USER_IMAGE_LOADED 0x80 /* RO */ |
| 78 | #define CXL_VSEC_PERST_LOADS_IMAGE 0x20 /* RW */ |
| 79 | #define CXL_VSEC_PERST_SELECT_USER 0x10 /* RW */ |
| 80 | |
| 81 | #define CXL_READ_VSEC_AFU_DESC_OFF(dev, vsec, dest) \ |
| 82 | pci_read_config_dword(dev, vsec + 0x20, dest) |
| 83 | #define CXL_READ_VSEC_AFU_DESC_SIZE(dev, vsec, dest) \ |
| 84 | pci_read_config_dword(dev, vsec + 0x24, dest) |
| 85 | #define CXL_READ_VSEC_PS_OFF(dev, vsec, dest) \ |
| 86 | pci_read_config_dword(dev, vsec + 0x28, dest) |
| 87 | #define CXL_READ_VSEC_PS_SIZE(dev, vsec, dest) \ |
| 88 | pci_read_config_dword(dev, vsec + 0x2c, dest) |
| 89 | |
| 90 | |
| 91 | /* This works a little different than the p1/p2 register accesses to make it |
| 92 | * easier to pull out individual fields */ |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 93 | #define AFUD_READ(afu, off) in_be64(afu->native->afu_desc_mmio + off) |
| 94 | #define AFUD_READ_LE(afu, off) in_le64(afu->native->afu_desc_mmio + off) |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 95 | #define EXTRACT_PPC_BIT(val, bit) (!!(val & PPC_BIT(bit))) |
| 96 | #define EXTRACT_PPC_BITS(val, bs, be) ((val & PPC_BITMASK(bs, be)) >> PPC_BITLSHIFT(be)) |
| 97 | |
| 98 | #define AFUD_READ_INFO(afu) AFUD_READ(afu, 0x0) |
| 99 | #define AFUD_NUM_INTS_PER_PROC(val) EXTRACT_PPC_BITS(val, 0, 15) |
| 100 | #define AFUD_NUM_PROCS(val) EXTRACT_PPC_BITS(val, 16, 31) |
| 101 | #define AFUD_NUM_CRS(val) EXTRACT_PPC_BITS(val, 32, 47) |
| 102 | #define AFUD_MULTIMODE(val) EXTRACT_PPC_BIT(val, 48) |
| 103 | #define AFUD_PUSH_BLOCK_TRANSFER(val) EXTRACT_PPC_BIT(val, 55) |
| 104 | #define AFUD_DEDICATED_PROCESS(val) EXTRACT_PPC_BIT(val, 59) |
| 105 | #define AFUD_AFU_DIRECTED(val) EXTRACT_PPC_BIT(val, 61) |
| 106 | #define AFUD_TIME_SLICED(val) EXTRACT_PPC_BIT(val, 63) |
| 107 | #define AFUD_READ_CR(afu) AFUD_READ(afu, 0x20) |
| 108 | #define AFUD_CR_LEN(val) EXTRACT_PPC_BITS(val, 8, 63) |
| 109 | #define AFUD_READ_CR_OFF(afu) AFUD_READ(afu, 0x28) |
| 110 | #define AFUD_READ_PPPSA(afu) AFUD_READ(afu, 0x30) |
| 111 | #define AFUD_PPPSA_PP(val) EXTRACT_PPC_BIT(val, 6) |
| 112 | #define AFUD_PPPSA_PSA(val) EXTRACT_PPC_BIT(val, 7) |
| 113 | #define AFUD_PPPSA_LEN(val) EXTRACT_PPC_BITS(val, 8, 63) |
| 114 | #define AFUD_READ_PPPSA_OFF(afu) AFUD_READ(afu, 0x38) |
| 115 | #define AFUD_READ_EB(afu) AFUD_READ(afu, 0x40) |
| 116 | #define AFUD_EB_LEN(val) EXTRACT_PPC_BITS(val, 8, 63) |
| 117 | #define AFUD_READ_EB_OFF(afu) AFUD_READ(afu, 0x48) |
| 118 | |
Vaishali Thakkar | f47f966 | 2015-07-19 22:53:52 +0530 | [diff] [blame] | 119 | static const struct pci_device_id cxl_pci_tbl[] = { |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 120 | { PCI_DEVICE(PCI_VENDOR_ID_IBM, 0x0477), }, |
| 121 | { PCI_DEVICE(PCI_VENDOR_ID_IBM, 0x044b), }, |
| 122 | { PCI_DEVICE(PCI_VENDOR_ID_IBM, 0x04cf), }, |
Uma Krishnan | 68adb7b | 2015-12-07 16:03:32 -0600 | [diff] [blame] | 123 | { PCI_DEVICE(PCI_VENDOR_ID_IBM, 0x0601), }, |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 124 | { PCI_DEVICE_CLASS(0x120000, ~0), }, |
| 125 | |
| 126 | { } |
| 127 | }; |
| 128 | MODULE_DEVICE_TABLE(pci, cxl_pci_tbl); |
| 129 | |
| 130 | |
| 131 | /* |
| 132 | * Mostly using these wrappers to avoid confusion: |
| 133 | * priv 1 is BAR2, while priv 2 is BAR0 |
| 134 | */ |
| 135 | static inline resource_size_t p1_base(struct pci_dev *dev) |
| 136 | { |
| 137 | return pci_resource_start(dev, 2); |
| 138 | } |
| 139 | |
| 140 | static inline resource_size_t p1_size(struct pci_dev *dev) |
| 141 | { |
| 142 | return pci_resource_len(dev, 2); |
| 143 | } |
| 144 | |
| 145 | static inline resource_size_t p2_base(struct pci_dev *dev) |
| 146 | { |
| 147 | return pci_resource_start(dev, 0); |
| 148 | } |
| 149 | |
| 150 | static inline resource_size_t p2_size(struct pci_dev *dev) |
| 151 | { |
| 152 | return pci_resource_len(dev, 0); |
| 153 | } |
| 154 | |
| 155 | static int find_cxl_vsec(struct pci_dev *dev) |
| 156 | { |
| 157 | int vsec = 0; |
| 158 | u16 val; |
| 159 | |
| 160 | while ((vsec = pci_find_next_ext_capability(dev, vsec, PCI_EXT_CAP_ID_VNDR))) { |
| 161 | pci_read_config_word(dev, vsec + 0x4, &val); |
| 162 | if (val == CXL_PCI_VSEC_ID) |
| 163 | return vsec; |
| 164 | } |
| 165 | return 0; |
| 166 | |
| 167 | } |
| 168 | |
| 169 | static void dump_cxl_config_space(struct pci_dev *dev) |
| 170 | { |
| 171 | int vsec; |
| 172 | u32 val; |
| 173 | |
| 174 | dev_info(&dev->dev, "dump_cxl_config_space\n"); |
| 175 | |
| 176 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &val); |
| 177 | dev_info(&dev->dev, "BAR0: %#.8x\n", val); |
| 178 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, &val); |
| 179 | dev_info(&dev->dev, "BAR1: %#.8x\n", val); |
| 180 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_2, &val); |
| 181 | dev_info(&dev->dev, "BAR2: %#.8x\n", val); |
| 182 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_3, &val); |
| 183 | dev_info(&dev->dev, "BAR3: %#.8x\n", val); |
| 184 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_4, &val); |
| 185 | dev_info(&dev->dev, "BAR4: %#.8x\n", val); |
| 186 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_5, &val); |
| 187 | dev_info(&dev->dev, "BAR5: %#.8x\n", val); |
| 188 | |
| 189 | dev_info(&dev->dev, "p1 regs: %#llx, len: %#llx\n", |
| 190 | p1_base(dev), p1_size(dev)); |
| 191 | dev_info(&dev->dev, "p2 regs: %#llx, len: %#llx\n", |
Michael Neuling | f293106 | 2015-06-18 15:15:10 +1000 | [diff] [blame] | 192 | p2_base(dev), p2_size(dev)); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 193 | dev_info(&dev->dev, "BAR 4/5: %#llx, len: %#llx\n", |
| 194 | pci_resource_start(dev, 4), pci_resource_len(dev, 4)); |
| 195 | |
| 196 | if (!(vsec = find_cxl_vsec(dev))) |
| 197 | return; |
| 198 | |
| 199 | #define show_reg(name, what) \ |
| 200 | dev_info(&dev->dev, "cxl vsec: %30s: %#x\n", name, what) |
| 201 | |
| 202 | pci_read_config_dword(dev, vsec + 0x0, &val); |
| 203 | show_reg("Cap ID", (val >> 0) & 0xffff); |
| 204 | show_reg("Cap Ver", (val >> 16) & 0xf); |
| 205 | show_reg("Next Cap Ptr", (val >> 20) & 0xfff); |
| 206 | pci_read_config_dword(dev, vsec + 0x4, &val); |
| 207 | show_reg("VSEC ID", (val >> 0) & 0xffff); |
| 208 | show_reg("VSEC Rev", (val >> 16) & 0xf); |
| 209 | show_reg("VSEC Length", (val >> 20) & 0xfff); |
| 210 | pci_read_config_dword(dev, vsec + 0x8, &val); |
| 211 | show_reg("Num AFUs", (val >> 0) & 0xff); |
| 212 | show_reg("Status", (val >> 8) & 0xff); |
| 213 | show_reg("Mode Control", (val >> 16) & 0xff); |
| 214 | show_reg("Reserved", (val >> 24) & 0xff); |
| 215 | pci_read_config_dword(dev, vsec + 0xc, &val); |
| 216 | show_reg("PSL Rev", (val >> 0) & 0xffff); |
| 217 | show_reg("CAIA Ver", (val >> 16) & 0xffff); |
| 218 | pci_read_config_dword(dev, vsec + 0x10, &val); |
| 219 | show_reg("Base Image Rev", (val >> 0) & 0xffff); |
| 220 | show_reg("Reserved", (val >> 16) & 0x0fff); |
| 221 | show_reg("Image Control", (val >> 28) & 0x3); |
| 222 | show_reg("Reserved", (val >> 30) & 0x1); |
| 223 | show_reg("Image Loaded", (val >> 31) & 0x1); |
| 224 | |
| 225 | pci_read_config_dword(dev, vsec + 0x14, &val); |
| 226 | show_reg("Reserved", val); |
| 227 | pci_read_config_dword(dev, vsec + 0x18, &val); |
| 228 | show_reg("Reserved", val); |
| 229 | pci_read_config_dword(dev, vsec + 0x1c, &val); |
| 230 | show_reg("Reserved", val); |
| 231 | |
| 232 | pci_read_config_dword(dev, vsec + 0x20, &val); |
| 233 | show_reg("AFU Descriptor Offset", val); |
| 234 | pci_read_config_dword(dev, vsec + 0x24, &val); |
| 235 | show_reg("AFU Descriptor Size", val); |
| 236 | pci_read_config_dword(dev, vsec + 0x28, &val); |
| 237 | show_reg("Problem State Offset", val); |
| 238 | pci_read_config_dword(dev, vsec + 0x2c, &val); |
| 239 | show_reg("Problem State Size", val); |
| 240 | |
| 241 | pci_read_config_dword(dev, vsec + 0x30, &val); |
| 242 | show_reg("Reserved", val); |
| 243 | pci_read_config_dword(dev, vsec + 0x34, &val); |
| 244 | show_reg("Reserved", val); |
| 245 | pci_read_config_dword(dev, vsec + 0x38, &val); |
| 246 | show_reg("Reserved", val); |
| 247 | pci_read_config_dword(dev, vsec + 0x3c, &val); |
| 248 | show_reg("Reserved", val); |
| 249 | |
| 250 | pci_read_config_dword(dev, vsec + 0x40, &val); |
| 251 | show_reg("PSL Programming Port", val); |
| 252 | pci_read_config_dword(dev, vsec + 0x44, &val); |
| 253 | show_reg("PSL Programming Control", val); |
| 254 | |
| 255 | pci_read_config_dword(dev, vsec + 0x48, &val); |
| 256 | show_reg("Reserved", val); |
| 257 | pci_read_config_dword(dev, vsec + 0x4c, &val); |
| 258 | show_reg("Reserved", val); |
| 259 | |
| 260 | pci_read_config_dword(dev, vsec + 0x50, &val); |
| 261 | show_reg("Flash Address Register", val); |
| 262 | pci_read_config_dword(dev, vsec + 0x54, &val); |
| 263 | show_reg("Flash Size Register", val); |
| 264 | pci_read_config_dword(dev, vsec + 0x58, &val); |
| 265 | show_reg("Flash Status/Control Register", val); |
| 266 | pci_read_config_dword(dev, vsec + 0x58, &val); |
| 267 | show_reg("Flash Data Port", val); |
| 268 | |
| 269 | #undef show_reg |
| 270 | } |
| 271 | |
| 272 | static void dump_afu_descriptor(struct cxl_afu *afu) |
| 273 | { |
Michael Neuling | bfcdc8f | 2015-05-27 16:07:06 +1000 | [diff] [blame] | 274 | u64 val, afu_cr_num, afu_cr_off, afu_cr_len; |
| 275 | int i; |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 276 | |
| 277 | #define show_reg(name, what) \ |
| 278 | dev_info(&afu->dev, "afu desc: %30s: %#llx\n", name, what) |
| 279 | |
| 280 | val = AFUD_READ_INFO(afu); |
| 281 | show_reg("num_ints_per_process", AFUD_NUM_INTS_PER_PROC(val)); |
| 282 | show_reg("num_of_processes", AFUD_NUM_PROCS(val)); |
| 283 | show_reg("num_of_afu_CRs", AFUD_NUM_CRS(val)); |
| 284 | show_reg("req_prog_mode", val & 0xffffULL); |
Michael Neuling | bfcdc8f | 2015-05-27 16:07:06 +1000 | [diff] [blame] | 285 | afu_cr_num = AFUD_NUM_CRS(val); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 286 | |
| 287 | val = AFUD_READ(afu, 0x8); |
| 288 | show_reg("Reserved", val); |
| 289 | val = AFUD_READ(afu, 0x10); |
| 290 | show_reg("Reserved", val); |
| 291 | val = AFUD_READ(afu, 0x18); |
| 292 | show_reg("Reserved", val); |
| 293 | |
| 294 | val = AFUD_READ_CR(afu); |
| 295 | show_reg("Reserved", (val >> (63-7)) & 0xff); |
| 296 | show_reg("AFU_CR_len", AFUD_CR_LEN(val)); |
Michael Neuling | bfcdc8f | 2015-05-27 16:07:06 +1000 | [diff] [blame] | 297 | afu_cr_len = AFUD_CR_LEN(val) * 256; |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 298 | |
| 299 | val = AFUD_READ_CR_OFF(afu); |
Michael Neuling | bfcdc8f | 2015-05-27 16:07:06 +1000 | [diff] [blame] | 300 | afu_cr_off = val; |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 301 | show_reg("AFU_CR_offset", val); |
| 302 | |
| 303 | val = AFUD_READ_PPPSA(afu); |
| 304 | show_reg("PerProcessPSA_control", (val >> (63-7)) & 0xff); |
| 305 | show_reg("PerProcessPSA Length", AFUD_PPPSA_LEN(val)); |
| 306 | |
| 307 | val = AFUD_READ_PPPSA_OFF(afu); |
| 308 | show_reg("PerProcessPSA_offset", val); |
| 309 | |
| 310 | val = AFUD_READ_EB(afu); |
| 311 | show_reg("Reserved", (val >> (63-7)) & 0xff); |
| 312 | show_reg("AFU_EB_len", AFUD_EB_LEN(val)); |
| 313 | |
| 314 | val = AFUD_READ_EB_OFF(afu); |
| 315 | show_reg("AFU_EB_offset", val); |
| 316 | |
Michael Neuling | bfcdc8f | 2015-05-27 16:07:06 +1000 | [diff] [blame] | 317 | for (i = 0; i < afu_cr_num; i++) { |
| 318 | val = AFUD_READ_LE(afu, afu_cr_off + i * afu_cr_len); |
| 319 | show_reg("CR Vendor", val & 0xffff); |
| 320 | show_reg("CR Device", (val >> 16) & 0xffff); |
| 321 | } |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 322 | #undef show_reg |
| 323 | } |
| 324 | |
| 325 | static int init_implementation_adapter_regs(struct cxl *adapter, struct pci_dev *dev) |
| 326 | { |
| 327 | struct device_node *np; |
| 328 | const __be32 *prop; |
| 329 | u64 psl_dsnctl; |
| 330 | u64 chipid; |
| 331 | |
Ryan Grimm | 6f963ec | 2015-01-28 20:16:04 -0600 | [diff] [blame] | 332 | if (!(np = pnv_pci_get_phb_node(dev))) |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 333 | return -ENODEV; |
| 334 | |
| 335 | while (np && !(prop = of_get_property(np, "ibm,chip-id", NULL))) |
| 336 | np = of_get_next_parent(np); |
| 337 | if (!np) |
| 338 | return -ENODEV; |
| 339 | chipid = be32_to_cpup(prop); |
| 340 | of_node_put(np); |
| 341 | |
| 342 | /* Tell PSL where to route data to */ |
| 343 | psl_dsnctl = 0x02E8900002000000ULL | (chipid << (63-5)); |
| 344 | cxl_p1_write(adapter, CXL_PSL_DSNDCTL, psl_dsnctl); |
| 345 | cxl_p1_write(adapter, CXL_PSL_RESLCKTO, 0x20000000200ULL); |
| 346 | /* snoop write mask */ |
| 347 | cxl_p1_write(adapter, CXL_PSL_SNWRALLOC, 0x00000000FFFFFFFFULL); |
| 348 | /* set fir_accum */ |
| 349 | cxl_p1_write(adapter, CXL_PSL_FIR_CNTL, 0x0800000000000000ULL); |
| 350 | /* for debugging with trace arrays */ |
| 351 | cxl_p1_write(adapter, CXL_PSL_TRACE, 0x0000FF7C00000000ULL); |
| 352 | |
| 353 | return 0; |
| 354 | } |
| 355 | |
Philippe Bergheaud | 390fd59 | 2015-08-28 09:37:36 +0200 | [diff] [blame] | 356 | #define TBSYNC_CNT(n) (((u64)n & 0x7) << (63-6)) |
| 357 | #define _2048_250MHZ_CYCLES 1 |
| 358 | |
| 359 | static int cxl_setup_psl_timebase(struct cxl *adapter, struct pci_dev *dev) |
| 360 | { |
| 361 | u64 psl_tb; |
| 362 | int delta; |
| 363 | unsigned int retry = 0; |
| 364 | struct device_node *np; |
| 365 | |
| 366 | if (!(np = pnv_pci_get_phb_node(dev))) |
| 367 | return -ENODEV; |
| 368 | |
| 369 | /* Do not fail when CAPP timebase sync is not supported by OPAL */ |
| 370 | of_node_get(np); |
| 371 | if (! of_get_property(np, "ibm,capp-timebase-sync", NULL)) { |
| 372 | of_node_put(np); |
| 373 | pr_err("PSL: Timebase sync: OPAL support missing\n"); |
| 374 | return 0; |
| 375 | } |
| 376 | of_node_put(np); |
| 377 | |
| 378 | /* |
| 379 | * Setup PSL Timebase Control and Status register |
| 380 | * with the recommended Timebase Sync Count value |
| 381 | */ |
| 382 | cxl_p1_write(adapter, CXL_PSL_TB_CTLSTAT, |
| 383 | TBSYNC_CNT(2 * _2048_250MHZ_CYCLES)); |
| 384 | |
| 385 | /* Enable PSL Timebase */ |
| 386 | cxl_p1_write(adapter, CXL_PSL_Control, 0x0000000000000000); |
| 387 | cxl_p1_write(adapter, CXL_PSL_Control, CXL_PSL_Control_tb); |
| 388 | |
| 389 | /* Wait until CORE TB and PSL TB difference <= 16usecs */ |
| 390 | do { |
| 391 | msleep(1); |
| 392 | if (retry++ > 5) { |
| 393 | pr_err("PSL: Timebase sync: giving up!\n"); |
| 394 | return -EIO; |
| 395 | } |
| 396 | psl_tb = cxl_p1_read(adapter, CXL_PSL_Timebase); |
| 397 | delta = mftb() - psl_tb; |
| 398 | if (delta < 0) |
| 399 | delta = -delta; |
| 400 | } while (cputime_to_usecs(delta) > 16); |
| 401 | |
| 402 | return 0; |
| 403 | } |
| 404 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 405 | static int init_implementation_afu_regs(struct cxl_afu *afu) |
| 406 | { |
| 407 | /* read/write masks for this slice */ |
| 408 | cxl_p1n_write(afu, CXL_PSL_APCALLOC_A, 0xFFFFFFFEFEFEFEFEULL); |
| 409 | /* APC read/write masks for this slice */ |
| 410 | cxl_p1n_write(afu, CXL_PSL_COALLOC_A, 0xFF000000FEFEFEFEULL); |
| 411 | /* for debugging with trace arrays */ |
| 412 | cxl_p1n_write(afu, CXL_PSL_SLICE_TRACE, 0x0000FFFF00000000ULL); |
Ian Munsie | d6a6af2 | 2014-12-08 19:17:59 +1100 | [diff] [blame] | 413 | cxl_p1n_write(afu, CXL_PSL_RXCTL_A, CXL_PSL_RXCTL_AFUHP_4S); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 414 | |
| 415 | return 0; |
| 416 | } |
| 417 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 418 | int cxl_pci_setup_irq(struct cxl *adapter, unsigned int hwirq, |
| 419 | unsigned int virq) |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 420 | { |
| 421 | struct pci_dev *dev = to_pci_dev(adapter->dev.parent); |
| 422 | |
| 423 | return pnv_cxl_ioda_msi_setup(dev, hwirq, virq); |
| 424 | } |
| 425 | |
Ryan Grimm | 4beb542 | 2015-01-19 11:52:48 -0600 | [diff] [blame] | 426 | int cxl_update_image_control(struct cxl *adapter) |
| 427 | { |
| 428 | struct pci_dev *dev = to_pci_dev(adapter->dev.parent); |
| 429 | int rc; |
| 430 | int vsec; |
| 431 | u8 image_state; |
| 432 | |
| 433 | if (!(vsec = find_cxl_vsec(dev))) { |
| 434 | dev_err(&dev->dev, "ABORTING: CXL VSEC not found!\n"); |
| 435 | return -ENODEV; |
| 436 | } |
| 437 | |
| 438 | if ((rc = CXL_READ_VSEC_IMAGE_STATE(dev, vsec, &image_state))) { |
| 439 | dev_err(&dev->dev, "failed to read image state: %i\n", rc); |
| 440 | return rc; |
| 441 | } |
| 442 | |
| 443 | if (adapter->perst_loads_image) |
| 444 | image_state |= CXL_VSEC_PERST_LOADS_IMAGE; |
| 445 | else |
| 446 | image_state &= ~CXL_VSEC_PERST_LOADS_IMAGE; |
| 447 | |
| 448 | if (adapter->perst_select_user) |
| 449 | image_state |= CXL_VSEC_PERST_SELECT_USER; |
| 450 | else |
| 451 | image_state &= ~CXL_VSEC_PERST_SELECT_USER; |
| 452 | |
| 453 | if ((rc = CXL_WRITE_VSEC_IMAGE_STATE(dev, vsec, image_state))) { |
| 454 | dev_err(&dev->dev, "failed to update image control: %i\n", rc); |
| 455 | return rc; |
| 456 | } |
| 457 | |
| 458 | return 0; |
| 459 | } |
| 460 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 461 | int cxl_pci_alloc_one_irq(struct cxl *adapter) |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 462 | { |
| 463 | struct pci_dev *dev = to_pci_dev(adapter->dev.parent); |
| 464 | |
| 465 | return pnv_cxl_alloc_hwirqs(dev, 1); |
| 466 | } |
| 467 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 468 | void cxl_pci_release_one_irq(struct cxl *adapter, int hwirq) |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 469 | { |
| 470 | struct pci_dev *dev = to_pci_dev(adapter->dev.parent); |
| 471 | |
| 472 | return pnv_cxl_release_hwirqs(dev, hwirq, 1); |
| 473 | } |
| 474 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 475 | int cxl_pci_alloc_irq_ranges(struct cxl_irq_ranges *irqs, |
| 476 | struct cxl *adapter, unsigned int num) |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 477 | { |
| 478 | struct pci_dev *dev = to_pci_dev(adapter->dev.parent); |
| 479 | |
| 480 | return pnv_cxl_alloc_hwirq_ranges(irqs, dev, num); |
| 481 | } |
| 482 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 483 | void cxl_pci_release_irq_ranges(struct cxl_irq_ranges *irqs, |
| 484 | struct cxl *adapter) |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 485 | { |
| 486 | struct pci_dev *dev = to_pci_dev(adapter->dev.parent); |
| 487 | |
| 488 | pnv_cxl_release_hwirq_ranges(irqs, dev); |
| 489 | } |
| 490 | |
| 491 | static int setup_cxl_bars(struct pci_dev *dev) |
| 492 | { |
| 493 | /* Safety check in case we get backported to < 3.17 without M64 */ |
| 494 | if ((p1_base(dev) < 0x100000000ULL) || |
| 495 | (p2_base(dev) < 0x100000000ULL)) { |
| 496 | dev_err(&dev->dev, "ABORTING: M32 BAR assignment incompatible with CXL\n"); |
| 497 | return -ENODEV; |
| 498 | } |
| 499 | |
| 500 | /* |
| 501 | * BAR 4/5 has a special meaning for CXL and must be programmed with a |
| 502 | * special value corresponding to the CXL protocol address range. |
| 503 | * For POWER 8 that means bits 48:49 must be set to 10 |
| 504 | */ |
| 505 | pci_write_config_dword(dev, PCI_BASE_ADDRESS_4, 0x00000000); |
| 506 | pci_write_config_dword(dev, PCI_BASE_ADDRESS_5, 0x00020000); |
| 507 | |
| 508 | return 0; |
| 509 | } |
| 510 | |
| 511 | /* pciex node: ibm,opal-m64-window = <0x3d058 0x0 0x3d058 0x0 0x8 0x0>; */ |
| 512 | static int switch_card_to_cxl(struct pci_dev *dev) |
| 513 | { |
| 514 | int vsec; |
| 515 | u8 val; |
| 516 | int rc; |
| 517 | |
| 518 | dev_info(&dev->dev, "switch card to CXL\n"); |
| 519 | |
| 520 | if (!(vsec = find_cxl_vsec(dev))) { |
| 521 | dev_err(&dev->dev, "ABORTING: CXL VSEC not found!\n"); |
| 522 | return -ENODEV; |
| 523 | } |
| 524 | |
| 525 | if ((rc = CXL_READ_VSEC_MODE_CONTROL(dev, vsec, &val))) { |
| 526 | dev_err(&dev->dev, "failed to read current mode control: %i", rc); |
| 527 | return rc; |
| 528 | } |
| 529 | val &= ~CXL_VSEC_PROTOCOL_MASK; |
| 530 | val |= CXL_VSEC_PROTOCOL_256TB | CXL_VSEC_PROTOCOL_ENABLE; |
| 531 | if ((rc = CXL_WRITE_VSEC_MODE_CONTROL(dev, vsec, val))) { |
| 532 | dev_err(&dev->dev, "failed to enable CXL protocol: %i", rc); |
| 533 | return rc; |
| 534 | } |
| 535 | /* |
| 536 | * The CAIA spec (v0.12 11.6 Bi-modal Device Support) states |
| 537 | * we must wait 100ms after this mode switch before touching |
| 538 | * PCIe config space. |
| 539 | */ |
| 540 | msleep(100); |
| 541 | |
| 542 | return 0; |
| 543 | } |
| 544 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 545 | static int pci_map_slice_regs(struct cxl_afu *afu, struct cxl *adapter, struct pci_dev *dev) |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 546 | { |
| 547 | u64 p1n_base, p2n_base, afu_desc; |
| 548 | const u64 p1n_size = 0x100; |
| 549 | const u64 p2n_size = 0x1000; |
| 550 | |
| 551 | p1n_base = p1_base(dev) + 0x10000 + (afu->slice * p1n_size); |
| 552 | p2n_base = p2_base(dev) + (afu->slice * p2n_size); |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 553 | afu->psn_phys = p2_base(dev) + (adapter->native->ps_off + (afu->slice * adapter->ps_size)); |
| 554 | afu_desc = p2_base(dev) + adapter->native->afu_desc_off + (afu->slice * adapter->native->afu_desc_size); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 555 | |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 556 | if (!(afu->native->p1n_mmio = ioremap(p1n_base, p1n_size))) |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 557 | goto err; |
| 558 | if (!(afu->p2n_mmio = ioremap(p2n_base, p2n_size))) |
| 559 | goto err1; |
| 560 | if (afu_desc) { |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 561 | if (!(afu->native->afu_desc_mmio = ioremap(afu_desc, adapter->native->afu_desc_size))) |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 562 | goto err2; |
| 563 | } |
| 564 | |
| 565 | return 0; |
| 566 | err2: |
| 567 | iounmap(afu->p2n_mmio); |
| 568 | err1: |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 569 | iounmap(afu->native->p1n_mmio); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 570 | err: |
| 571 | dev_err(&afu->dev, "Error mapping AFU MMIO regions\n"); |
| 572 | return -ENOMEM; |
| 573 | } |
| 574 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 575 | static void pci_unmap_slice_regs(struct cxl_afu *afu) |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 576 | { |
Daniel Axtens | 575e698 | 2015-08-14 17:41:21 +1000 | [diff] [blame] | 577 | if (afu->p2n_mmio) { |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 578 | iounmap(afu->p2n_mmio); |
Daniel Axtens | 575e698 | 2015-08-14 17:41:21 +1000 | [diff] [blame] | 579 | afu->p2n_mmio = NULL; |
| 580 | } |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 581 | if (afu->native->p1n_mmio) { |
| 582 | iounmap(afu->native->p1n_mmio); |
| 583 | afu->native->p1n_mmio = NULL; |
Daniel Axtens | 575e698 | 2015-08-14 17:41:21 +1000 | [diff] [blame] | 584 | } |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 585 | if (afu->native->afu_desc_mmio) { |
| 586 | iounmap(afu->native->afu_desc_mmio); |
| 587 | afu->native->afu_desc_mmio = NULL; |
Daniel Axtens | 575e698 | 2015-08-14 17:41:21 +1000 | [diff] [blame] | 588 | } |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 589 | } |
| 590 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 591 | void cxl_pci_release_afu(struct device *dev) |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 592 | { |
| 593 | struct cxl_afu *afu = to_cxl_afu(dev); |
| 594 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 595 | pr_devel("%s\n", __func__); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 596 | |
Johannes Thumshirn | bd664f8 | 2015-07-09 09:39:42 +0200 | [diff] [blame] | 597 | idr_destroy(&afu->contexts_idr); |
Daniel Axtens | 05155772 | 2015-08-14 17:41:19 +1000 | [diff] [blame] | 598 | cxl_release_spa(afu); |
| 599 | |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 600 | kfree(afu->native); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 601 | kfree(afu); |
| 602 | } |
| 603 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 604 | /* Expects AFU struct to have recently been zeroed out */ |
| 605 | static int cxl_read_afu_descriptor(struct cxl_afu *afu) |
| 606 | { |
| 607 | u64 val; |
| 608 | |
| 609 | val = AFUD_READ_INFO(afu); |
| 610 | afu->pp_irqs = AFUD_NUM_INTS_PER_PROC(val); |
| 611 | afu->max_procs_virtualised = AFUD_NUM_PROCS(val); |
Ian Munsie | b087e61 | 2015-02-04 19:09:01 +1100 | [diff] [blame] | 612 | afu->crs_num = AFUD_NUM_CRS(val); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 613 | |
| 614 | if (AFUD_AFU_DIRECTED(val)) |
| 615 | afu->modes_supported |= CXL_MODE_DIRECTED; |
| 616 | if (AFUD_DEDICATED_PROCESS(val)) |
| 617 | afu->modes_supported |= CXL_MODE_DEDICATED; |
| 618 | if (AFUD_TIME_SLICED(val)) |
| 619 | afu->modes_supported |= CXL_MODE_TIME_SLICED; |
| 620 | |
| 621 | val = AFUD_READ_PPPSA(afu); |
| 622 | afu->pp_size = AFUD_PPPSA_LEN(val) * 4096; |
| 623 | afu->psa = AFUD_PPPSA_PSA(val); |
| 624 | if ((afu->pp_psa = AFUD_PPPSA_PP(val))) |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 625 | afu->native->pp_offset = AFUD_READ_PPPSA_OFF(afu); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 626 | |
Ian Munsie | b087e61 | 2015-02-04 19:09:01 +1100 | [diff] [blame] | 627 | val = AFUD_READ_CR(afu); |
| 628 | afu->crs_len = AFUD_CR_LEN(val) * 256; |
| 629 | afu->crs_offset = AFUD_READ_CR_OFF(afu); |
| 630 | |
Vaibhav Jain | e36f6fe | 2015-05-22 10:56:05 +0530 | [diff] [blame] | 631 | |
| 632 | /* eb_len is in multiple of 4K */ |
| 633 | afu->eb_len = AFUD_EB_LEN(AFUD_READ_EB(afu)) * 4096; |
| 634 | afu->eb_offset = AFUD_READ_EB_OFF(afu); |
| 635 | |
| 636 | /* eb_off is 4K aligned so lower 12 bits are always zero */ |
| 637 | if (EXTRACT_PPC_BITS(afu->eb_offset, 0, 11) != 0) { |
| 638 | dev_warn(&afu->dev, |
| 639 | "Invalid AFU error buffer offset %Lx\n", |
| 640 | afu->eb_offset); |
| 641 | dev_info(&afu->dev, |
| 642 | "Ignoring AFU error buffer in the descriptor\n"); |
| 643 | /* indicate that no afu buffer exists */ |
| 644 | afu->eb_len = 0; |
| 645 | } |
| 646 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 647 | return 0; |
| 648 | } |
| 649 | |
| 650 | static int cxl_afu_descriptor_looks_ok(struct cxl_afu *afu) |
| 651 | { |
Frederic Barrat | 5be587b | 2016-03-04 12:26:28 +0100 | [diff] [blame] | 652 | int i, rc; |
| 653 | u32 val; |
Ian Munsie | 3d5be03 | 2015-02-04 19:09:02 +1100 | [diff] [blame] | 654 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 655 | if (afu->psa && afu->adapter->ps_size < |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 656 | (afu->native->pp_offset + afu->pp_size*afu->max_procs_virtualised)) { |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 657 | dev_err(&afu->dev, "per-process PSA can't fit inside the PSA!\n"); |
| 658 | return -ENODEV; |
| 659 | } |
| 660 | |
| 661 | if (afu->pp_psa && (afu->pp_size < PAGE_SIZE)) |
| 662 | dev_warn(&afu->dev, "AFU uses < PAGE_SIZE per-process PSA!"); |
| 663 | |
Ian Munsie | 3d5be03 | 2015-02-04 19:09:02 +1100 | [diff] [blame] | 664 | for (i = 0; i < afu->crs_num; i++) { |
Frederic Barrat | 5be587b | 2016-03-04 12:26:28 +0100 | [diff] [blame] | 665 | rc = cxl_ops->afu_cr_read32(afu, i, 0, &val); |
| 666 | if (rc || val == 0) { |
Ian Munsie | 3d5be03 | 2015-02-04 19:09:02 +1100 | [diff] [blame] | 667 | dev_err(&afu->dev, "ABORTING: AFU configuration record %i is invalid\n", i); |
| 668 | return -EINVAL; |
| 669 | } |
| 670 | } |
| 671 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 672 | return 0; |
| 673 | } |
| 674 | |
| 675 | static int sanitise_afu_regs(struct cxl_afu *afu) |
| 676 | { |
| 677 | u64 reg; |
| 678 | |
| 679 | /* |
| 680 | * Clear out any regs that contain either an IVTE or address or may be |
| 681 | * waiting on an acknowledgement to try to be a bit safer as we bring |
| 682 | * it online |
| 683 | */ |
| 684 | reg = cxl_p2n_read(afu, CXL_AFU_Cntl_An); |
| 685 | if ((reg & CXL_AFU_Cntl_An_ES_MASK) != CXL_AFU_Cntl_An_ES_Disabled) { |
Rasmus Villemoes | de36953 | 2015-06-11 13:27:52 +0200 | [diff] [blame] | 686 | dev_warn(&afu->dev, "WARNING: AFU was not disabled: %#016llx\n", reg); |
Frederic Barrat | 5be587b | 2016-03-04 12:26:28 +0100 | [diff] [blame] | 687 | if (cxl_ops->afu_reset(afu)) |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 688 | return -EIO; |
| 689 | if (cxl_afu_disable(afu)) |
| 690 | return -EIO; |
| 691 | if (cxl_psl_purge(afu)) |
| 692 | return -EIO; |
| 693 | } |
| 694 | cxl_p1n_write(afu, CXL_PSL_SPAP_An, 0x0000000000000000); |
| 695 | cxl_p1n_write(afu, CXL_PSL_IVTE_Limit_An, 0x0000000000000000); |
| 696 | cxl_p1n_write(afu, CXL_PSL_IVTE_Offset_An, 0x0000000000000000); |
| 697 | cxl_p1n_write(afu, CXL_PSL_AMBAR_An, 0x0000000000000000); |
| 698 | cxl_p1n_write(afu, CXL_PSL_SPOffset_An, 0x0000000000000000); |
| 699 | cxl_p1n_write(afu, CXL_HAURP_An, 0x0000000000000000); |
| 700 | cxl_p2n_write(afu, CXL_CSRP_An, 0x0000000000000000); |
| 701 | cxl_p2n_write(afu, CXL_AURP1_An, 0x0000000000000000); |
| 702 | cxl_p2n_write(afu, CXL_AURP0_An, 0x0000000000000000); |
| 703 | cxl_p2n_write(afu, CXL_SSTP1_An, 0x0000000000000000); |
| 704 | cxl_p2n_write(afu, CXL_SSTP0_An, 0x0000000000000000); |
| 705 | reg = cxl_p2n_read(afu, CXL_PSL_DSISR_An); |
| 706 | if (reg) { |
Rasmus Villemoes | de36953 | 2015-06-11 13:27:52 +0200 | [diff] [blame] | 707 | dev_warn(&afu->dev, "AFU had pending DSISR: %#016llx\n", reg); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 708 | if (reg & CXL_PSL_DSISR_TRANS) |
| 709 | cxl_p2n_write(afu, CXL_PSL_TFC_An, CXL_PSL_TFC_An_AE); |
| 710 | else |
| 711 | cxl_p2n_write(afu, CXL_PSL_TFC_An, CXL_PSL_TFC_An_A); |
| 712 | } |
| 713 | reg = cxl_p1n_read(afu, CXL_PSL_SERR_An); |
| 714 | if (reg) { |
| 715 | if (reg & ~0xffff) |
Rasmus Villemoes | de36953 | 2015-06-11 13:27:52 +0200 | [diff] [blame] | 716 | dev_warn(&afu->dev, "AFU had pending SERR: %#016llx\n", reg); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 717 | cxl_p1n_write(afu, CXL_PSL_SERR_An, reg & ~0xffff); |
| 718 | } |
| 719 | reg = cxl_p2n_read(afu, CXL_PSL_ErrStat_An); |
| 720 | if (reg) { |
Rasmus Villemoes | de36953 | 2015-06-11 13:27:52 +0200 | [diff] [blame] | 721 | dev_warn(&afu->dev, "AFU had pending error status: %#016llx\n", reg); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 722 | cxl_p2n_write(afu, CXL_PSL_ErrStat_An, reg); |
| 723 | } |
| 724 | |
| 725 | return 0; |
| 726 | } |
| 727 | |
Vaibhav Jain | e36f6fe | 2015-05-22 10:56:05 +0530 | [diff] [blame] | 728 | #define ERR_BUFF_MAX_COPY_SIZE PAGE_SIZE |
| 729 | /* |
| 730 | * afu_eb_read: |
| 731 | * Called from sysfs and reads the afu error info buffer. The h/w only supports |
| 732 | * 4/8 bytes aligned access. So in case the requested offset/count arent 8 byte |
| 733 | * aligned the function uses a bounce buffer which can be max PAGE_SIZE. |
| 734 | */ |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 735 | ssize_t cxl_pci_afu_read_err_buffer(struct cxl_afu *afu, char *buf, |
Vaibhav Jain | e36f6fe | 2015-05-22 10:56:05 +0530 | [diff] [blame] | 736 | loff_t off, size_t count) |
| 737 | { |
| 738 | loff_t aligned_start, aligned_end; |
| 739 | size_t aligned_length; |
| 740 | void *tbuf; |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 741 | const void __iomem *ebuf = afu->native->afu_desc_mmio + afu->eb_offset; |
Vaibhav Jain | e36f6fe | 2015-05-22 10:56:05 +0530 | [diff] [blame] | 742 | |
| 743 | if (count == 0 || off < 0 || (size_t)off >= afu->eb_len) |
| 744 | return 0; |
| 745 | |
| 746 | /* calculate aligned read window */ |
| 747 | count = min((size_t)(afu->eb_len - off), count); |
| 748 | aligned_start = round_down(off, 8); |
| 749 | aligned_end = round_up(off + count, 8); |
| 750 | aligned_length = aligned_end - aligned_start; |
| 751 | |
| 752 | /* max we can copy in one read is PAGE_SIZE */ |
| 753 | if (aligned_length > ERR_BUFF_MAX_COPY_SIZE) { |
| 754 | aligned_length = ERR_BUFF_MAX_COPY_SIZE; |
| 755 | count = ERR_BUFF_MAX_COPY_SIZE - (off & 0x7); |
| 756 | } |
| 757 | |
| 758 | /* use bounce buffer for copy */ |
| 759 | tbuf = (void *)__get_free_page(GFP_TEMPORARY); |
| 760 | if (!tbuf) |
| 761 | return -ENOMEM; |
| 762 | |
| 763 | /* perform aligned read from the mmio region */ |
| 764 | memcpy_fromio(tbuf, ebuf + aligned_start, aligned_length); |
| 765 | memcpy(buf, tbuf + (off & 0x7), count); |
| 766 | |
| 767 | free_page((unsigned long)tbuf); |
| 768 | |
| 769 | return count; |
| 770 | } |
| 771 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 772 | static int pci_configure_afu(struct cxl_afu *afu, struct cxl *adapter, struct pci_dev *dev) |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 773 | { |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 774 | int rc; |
| 775 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 776 | if ((rc = pci_map_slice_regs(afu, adapter, dev))) |
Daniel Axtens | d76427b | 2015-08-14 17:41:23 +1000 | [diff] [blame] | 777 | return rc; |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 778 | |
| 779 | if ((rc = sanitise_afu_regs(afu))) |
Daniel Axtens | d76427b | 2015-08-14 17:41:23 +1000 | [diff] [blame] | 780 | goto err1; |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 781 | |
| 782 | /* We need to reset the AFU before we can read the AFU descriptor */ |
Frederic Barrat | 5be587b | 2016-03-04 12:26:28 +0100 | [diff] [blame] | 783 | if ((rc = cxl_ops->afu_reset(afu))) |
Daniel Axtens | d76427b | 2015-08-14 17:41:23 +1000 | [diff] [blame] | 784 | goto err1; |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 785 | |
| 786 | if (cxl_verbose) |
| 787 | dump_afu_descriptor(afu); |
| 788 | |
| 789 | if ((rc = cxl_read_afu_descriptor(afu))) |
Daniel Axtens | d76427b | 2015-08-14 17:41:23 +1000 | [diff] [blame] | 790 | goto err1; |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 791 | |
| 792 | if ((rc = cxl_afu_descriptor_looks_ok(afu))) |
Daniel Axtens | d76427b | 2015-08-14 17:41:23 +1000 | [diff] [blame] | 793 | goto err1; |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 794 | |
| 795 | if ((rc = init_implementation_afu_regs(afu))) |
Daniel Axtens | d76427b | 2015-08-14 17:41:23 +1000 | [diff] [blame] | 796 | goto err1; |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 797 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 798 | if ((rc = cxl_native_register_serr_irq(afu))) |
Daniel Axtens | d76427b | 2015-08-14 17:41:23 +1000 | [diff] [blame] | 799 | goto err1; |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 800 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 801 | if ((rc = cxl_native_register_psl_irq(afu))) |
Daniel Axtens | d76427b | 2015-08-14 17:41:23 +1000 | [diff] [blame] | 802 | goto err2; |
| 803 | |
| 804 | return 0; |
| 805 | |
| 806 | err2: |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 807 | cxl_native_release_serr_irq(afu); |
Daniel Axtens | d76427b | 2015-08-14 17:41:23 +1000 | [diff] [blame] | 808 | err1: |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 809 | pci_unmap_slice_regs(afu); |
Daniel Axtens | d76427b | 2015-08-14 17:41:23 +1000 | [diff] [blame] | 810 | return rc; |
| 811 | } |
| 812 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 813 | static void pci_deconfigure_afu(struct cxl_afu *afu) |
Daniel Axtens | d76427b | 2015-08-14 17:41:23 +1000 | [diff] [blame] | 814 | { |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 815 | cxl_native_release_psl_irq(afu); |
| 816 | cxl_native_release_serr_irq(afu); |
| 817 | pci_unmap_slice_regs(afu); |
Daniel Axtens | d76427b | 2015-08-14 17:41:23 +1000 | [diff] [blame] | 818 | } |
| 819 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 820 | static int pci_init_afu(struct cxl *adapter, int slice, struct pci_dev *dev) |
Daniel Axtens | d76427b | 2015-08-14 17:41:23 +1000 | [diff] [blame] | 821 | { |
| 822 | struct cxl_afu *afu; |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 823 | int rc = -ENOMEM; |
Daniel Axtens | d76427b | 2015-08-14 17:41:23 +1000 | [diff] [blame] | 824 | |
| 825 | afu = cxl_alloc_afu(adapter, slice); |
| 826 | if (!afu) |
| 827 | return -ENOMEM; |
| 828 | |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 829 | afu->native = kzalloc(sizeof(struct cxl_afu_native), GFP_KERNEL); |
| 830 | if (!afu->native) |
| 831 | goto err_free_afu; |
| 832 | |
| 833 | mutex_init(&afu->native->spa_mutex); |
| 834 | |
Daniel Axtens | d76427b | 2015-08-14 17:41:23 +1000 | [diff] [blame] | 835 | rc = dev_set_name(&afu->dev, "afu%i.%i", adapter->adapter_num, slice); |
| 836 | if (rc) |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 837 | goto err_free_native; |
Daniel Axtens | d76427b | 2015-08-14 17:41:23 +1000 | [diff] [blame] | 838 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 839 | rc = pci_configure_afu(afu, adapter, dev); |
Daniel Axtens | d76427b | 2015-08-14 17:41:23 +1000 | [diff] [blame] | 840 | if (rc) |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 841 | goto err_free_native; |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 842 | |
| 843 | /* Don't care if this fails */ |
| 844 | cxl_debugfs_afu_add(afu); |
| 845 | |
| 846 | /* |
| 847 | * After we call this function we must not free the afu directly, even |
| 848 | * if it returns an error! |
| 849 | */ |
| 850 | if ((rc = cxl_register_afu(afu))) |
| 851 | goto err_put1; |
| 852 | |
| 853 | if ((rc = cxl_sysfs_afu_add(afu))) |
| 854 | goto err_put1; |
| 855 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 856 | adapter->afu[afu->slice] = afu; |
| 857 | |
Michael Neuling | 6f7f0b3 | 2015-05-27 16:07:18 +1000 | [diff] [blame] | 858 | if ((rc = cxl_pci_vphb_add(afu))) |
| 859 | dev_info(&afu->dev, "Can't register vPHB\n"); |
| 860 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 861 | return 0; |
| 862 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 863 | err_put1: |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 864 | pci_deconfigure_afu(afu); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 865 | cxl_debugfs_afu_remove(afu); |
Daniel Axtens | d76427b | 2015-08-14 17:41:23 +1000 | [diff] [blame] | 866 | device_unregister(&afu->dev); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 867 | return rc; |
Daniel Axtens | d76427b | 2015-08-14 17:41:23 +1000 | [diff] [blame] | 868 | |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 869 | err_free_native: |
| 870 | kfree(afu->native); |
| 871 | err_free_afu: |
Daniel Axtens | d76427b | 2015-08-14 17:41:23 +1000 | [diff] [blame] | 872 | kfree(afu); |
| 873 | return rc; |
| 874 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 875 | } |
| 876 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 877 | static void cxl_pci_remove_afu(struct cxl_afu *afu) |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 878 | { |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 879 | pr_devel("%s\n", __func__); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 880 | |
| 881 | if (!afu) |
| 882 | return; |
| 883 | |
| 884 | cxl_sysfs_afu_remove(afu); |
| 885 | cxl_debugfs_afu_remove(afu); |
| 886 | |
| 887 | spin_lock(&afu->adapter->afu_list_lock); |
| 888 | afu->adapter->afu[afu->slice] = NULL; |
| 889 | spin_unlock(&afu->adapter->afu_list_lock); |
| 890 | |
| 891 | cxl_context_detach_all(afu); |
Frederic Barrat | 5be587b | 2016-03-04 12:26:28 +0100 | [diff] [blame] | 892 | cxl_ops->afu_deactivate_mode(afu, afu->current_mode); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 893 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 894 | pci_deconfigure_afu(afu); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 895 | device_unregister(&afu->dev); |
| 896 | } |
| 897 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 898 | int cxl_pci_reset(struct cxl *adapter) |
Ryan Grimm | 62fa19d | 2015-01-19 11:52:51 -0600 | [diff] [blame] | 899 | { |
| 900 | struct pci_dev *dev = to_pci_dev(adapter->dev.parent); |
| 901 | int rc; |
Ryan Grimm | 62fa19d | 2015-01-19 11:52:51 -0600 | [diff] [blame] | 902 | |
Daniel Axtens | 13e68d8 | 2015-08-14 17:41:25 +1000 | [diff] [blame] | 903 | if (adapter->perst_same_image) { |
| 904 | dev_warn(&dev->dev, |
| 905 | "cxl: refusing to reset/reflash when perst_reloads_same_image is set.\n"); |
| 906 | return -EINVAL; |
| 907 | } |
| 908 | |
Ryan Grimm | 62fa19d | 2015-01-19 11:52:51 -0600 | [diff] [blame] | 909 | dev_info(&dev->dev, "CXL reset\n"); |
| 910 | |
Ryan Grimm | 62fa19d | 2015-01-19 11:52:51 -0600 | [diff] [blame] | 911 | /* pcie_warm_reset requests a fundamental pci reset which includes a |
| 912 | * PERST assert/deassert. PERST triggers a loading of the image |
| 913 | * if "user" or "factory" is selected in sysfs */ |
| 914 | if ((rc = pci_set_pcie_reset_state(dev, pcie_warm_reset))) { |
| 915 | dev_err(&dev->dev, "cxl: pcie_warm_reset failed\n"); |
| 916 | return rc; |
| 917 | } |
| 918 | |
Ryan Grimm | 62fa19d | 2015-01-19 11:52:51 -0600 | [diff] [blame] | 919 | return rc; |
| 920 | } |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 921 | |
| 922 | static int cxl_map_adapter_regs(struct cxl *adapter, struct pci_dev *dev) |
| 923 | { |
| 924 | if (pci_request_region(dev, 2, "priv 2 regs")) |
| 925 | goto err1; |
| 926 | if (pci_request_region(dev, 0, "priv 1 regs")) |
| 927 | goto err2; |
| 928 | |
Rasmus Villemoes | de36953 | 2015-06-11 13:27:52 +0200 | [diff] [blame] | 929 | pr_devel("cxl_map_adapter_regs: p1: %#016llx %#llx, p2: %#016llx %#llx", |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 930 | p1_base(dev), p1_size(dev), p2_base(dev), p2_size(dev)); |
| 931 | |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 932 | if (!(adapter->native->p1_mmio = ioremap(p1_base(dev), p1_size(dev)))) |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 933 | goto err3; |
| 934 | |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 935 | if (!(adapter->native->p2_mmio = ioremap(p2_base(dev), p2_size(dev)))) |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 936 | goto err4; |
| 937 | |
| 938 | return 0; |
| 939 | |
| 940 | err4: |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 941 | iounmap(adapter->native->p1_mmio); |
| 942 | adapter->native->p1_mmio = NULL; |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 943 | err3: |
| 944 | pci_release_region(dev, 0); |
| 945 | err2: |
| 946 | pci_release_region(dev, 2); |
| 947 | err1: |
| 948 | return -ENOMEM; |
| 949 | } |
| 950 | |
| 951 | static void cxl_unmap_adapter_regs(struct cxl *adapter) |
| 952 | { |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 953 | if (adapter->native->p1_mmio) { |
| 954 | iounmap(adapter->native->p1_mmio); |
| 955 | adapter->native->p1_mmio = NULL; |
Daniel Axtens | 575e698 | 2015-08-14 17:41:21 +1000 | [diff] [blame] | 956 | pci_release_region(to_pci_dev(adapter->dev.parent), 2); |
| 957 | } |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 958 | if (adapter->native->p2_mmio) { |
| 959 | iounmap(adapter->native->p2_mmio); |
| 960 | adapter->native->p2_mmio = NULL; |
Daniel Axtens | 575e698 | 2015-08-14 17:41:21 +1000 | [diff] [blame] | 961 | pci_release_region(to_pci_dev(adapter->dev.parent), 0); |
| 962 | } |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 963 | } |
| 964 | |
| 965 | static int cxl_read_vsec(struct cxl *adapter, struct pci_dev *dev) |
| 966 | { |
| 967 | int vsec; |
| 968 | u32 afu_desc_off, afu_desc_size; |
| 969 | u32 ps_off, ps_size; |
| 970 | u16 vseclen; |
| 971 | u8 image_state; |
| 972 | |
| 973 | if (!(vsec = find_cxl_vsec(dev))) { |
Ian Munsie | bee30c7 | 2015-05-27 16:07:04 +1000 | [diff] [blame] | 974 | dev_err(&dev->dev, "ABORTING: CXL VSEC not found!\n"); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 975 | return -ENODEV; |
| 976 | } |
| 977 | |
| 978 | CXL_READ_VSEC_LENGTH(dev, vsec, &vseclen); |
| 979 | if (vseclen < CXL_VSEC_MIN_SIZE) { |
Ian Munsie | bee30c7 | 2015-05-27 16:07:04 +1000 | [diff] [blame] | 980 | dev_err(&dev->dev, "ABORTING: CXL VSEC too short\n"); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 981 | return -EINVAL; |
| 982 | } |
| 983 | |
| 984 | CXL_READ_VSEC_STATUS(dev, vsec, &adapter->vsec_status); |
| 985 | CXL_READ_VSEC_PSL_REVISION(dev, vsec, &adapter->psl_rev); |
| 986 | CXL_READ_VSEC_CAIA_MAJOR(dev, vsec, &adapter->caia_major); |
| 987 | CXL_READ_VSEC_CAIA_MINOR(dev, vsec, &adapter->caia_minor); |
| 988 | CXL_READ_VSEC_BASE_IMAGE(dev, vsec, &adapter->base_image); |
| 989 | CXL_READ_VSEC_IMAGE_STATE(dev, vsec, &image_state); |
| 990 | adapter->user_image_loaded = !!(image_state & CXL_VSEC_USER_IMAGE_LOADED); |
Ryan Grimm | 4beb542 | 2015-01-19 11:52:48 -0600 | [diff] [blame] | 991 | adapter->perst_select_user = !!(image_state & CXL_VSEC_USER_IMAGE_LOADED); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 992 | |
| 993 | CXL_READ_VSEC_NAFUS(dev, vsec, &adapter->slices); |
| 994 | CXL_READ_VSEC_AFU_DESC_OFF(dev, vsec, &afu_desc_off); |
| 995 | CXL_READ_VSEC_AFU_DESC_SIZE(dev, vsec, &afu_desc_size); |
| 996 | CXL_READ_VSEC_PS_OFF(dev, vsec, &ps_off); |
| 997 | CXL_READ_VSEC_PS_SIZE(dev, vsec, &ps_size); |
| 998 | |
| 999 | /* Convert everything to bytes, because there is NO WAY I'd look at the |
| 1000 | * code a month later and forget what units these are in ;-) */ |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 1001 | adapter->native->ps_off = ps_off * 64 * 1024; |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1002 | adapter->ps_size = ps_size * 64 * 1024; |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 1003 | adapter->native->afu_desc_off = afu_desc_off * 64 * 1024; |
| 1004 | adapter->native->afu_desc_size = afu_desc_size * 64 * 1024; |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1005 | |
| 1006 | /* Total IRQs - 1 PSL ERROR - #AFU*(1 slice error + 1 DSI) */ |
| 1007 | adapter->user_irqs = pnv_cxl_get_irq_count(dev) - 1 - 2*adapter->slices; |
| 1008 | |
| 1009 | return 0; |
| 1010 | } |
| 1011 | |
Philippe Bergheaud | d79e680 | 2015-10-02 15:23:33 +1000 | [diff] [blame] | 1012 | /* |
| 1013 | * Workaround a PCIe Host Bridge defect on some cards, that can cause |
| 1014 | * malformed Transaction Layer Packet (TLP) errors to be erroneously |
| 1015 | * reported. Mask this error in the Uncorrectable Error Mask Register. |
| 1016 | * |
| 1017 | * The upper nibble of the PSL revision is used to distinguish between |
| 1018 | * different cards. The affected ones have it set to 0. |
| 1019 | */ |
| 1020 | static void cxl_fixup_malformed_tlp(struct cxl *adapter, struct pci_dev *dev) |
| 1021 | { |
| 1022 | int aer; |
| 1023 | u32 data; |
| 1024 | |
| 1025 | if (adapter->psl_rev & 0xf000) |
| 1026 | return; |
| 1027 | if (!(aer = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR))) |
| 1028 | return; |
| 1029 | pci_read_config_dword(dev, aer + PCI_ERR_UNCOR_MASK, &data); |
| 1030 | if (data & PCI_ERR_UNC_MALF_TLP) |
| 1031 | if (data & PCI_ERR_UNC_INTN) |
| 1032 | return; |
| 1033 | data |= PCI_ERR_UNC_MALF_TLP; |
| 1034 | data |= PCI_ERR_UNC_INTN; |
| 1035 | pci_write_config_dword(dev, aer + PCI_ERR_UNCOR_MASK, data); |
| 1036 | } |
| 1037 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1038 | static int cxl_vsec_looks_ok(struct cxl *adapter, struct pci_dev *dev) |
| 1039 | { |
| 1040 | if (adapter->vsec_status & CXL_STATUS_SECOND_PORT) |
| 1041 | return -EBUSY; |
| 1042 | |
| 1043 | if (adapter->vsec_status & CXL_UNSUPPORTED_FEATURES) { |
Ian Munsie | bee30c7 | 2015-05-27 16:07:04 +1000 | [diff] [blame] | 1044 | dev_err(&dev->dev, "ABORTING: CXL requires unsupported features\n"); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1045 | return -EINVAL; |
| 1046 | } |
| 1047 | |
| 1048 | if (!adapter->slices) { |
| 1049 | /* Once we support dynamic reprogramming we can use the card if |
| 1050 | * it supports loadable AFUs */ |
Ian Munsie | bee30c7 | 2015-05-27 16:07:04 +1000 | [diff] [blame] | 1051 | dev_err(&dev->dev, "ABORTING: Device has no AFUs\n"); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1052 | return -EINVAL; |
| 1053 | } |
| 1054 | |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 1055 | if (!adapter->native->afu_desc_off || !adapter->native->afu_desc_size) { |
Ian Munsie | bee30c7 | 2015-05-27 16:07:04 +1000 | [diff] [blame] | 1056 | dev_err(&dev->dev, "ABORTING: VSEC shows no AFU descriptors\n"); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1057 | return -EINVAL; |
| 1058 | } |
| 1059 | |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 1060 | if (adapter->ps_size > p2_size(dev) - adapter->native->ps_off) { |
Ian Munsie | bee30c7 | 2015-05-27 16:07:04 +1000 | [diff] [blame] | 1061 | dev_err(&dev->dev, "ABORTING: Problem state size larger than " |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1062 | "available in BAR2: 0x%llx > 0x%llx\n", |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 1063 | adapter->ps_size, p2_size(dev) - adapter->native->ps_off); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1064 | return -EINVAL; |
| 1065 | } |
| 1066 | |
| 1067 | return 0; |
| 1068 | } |
| 1069 | |
| 1070 | static void cxl_release_adapter(struct device *dev) |
| 1071 | { |
| 1072 | struct cxl *adapter = to_cxl_adapter(dev); |
| 1073 | |
| 1074 | pr_devel("cxl_release_adapter\n"); |
| 1075 | |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1076 | cxl_remove_adapter_nr(adapter); |
| 1077 | |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 1078 | kfree(adapter->native); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1079 | kfree(adapter); |
| 1080 | } |
| 1081 | |
Philippe Bergheaud | 390fd59 | 2015-08-28 09:37:36 +0200 | [diff] [blame] | 1082 | #define CXL_PSL_ErrIVTE_tberror (0x1ull << (63-31)) |
| 1083 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1084 | static int sanitise_adapter_regs(struct cxl *adapter) |
| 1085 | { |
Philippe Bergheaud | 390fd59 | 2015-08-28 09:37:36 +0200 | [diff] [blame] | 1086 | /* Clear PSL tberror bit by writing 1 to it */ |
| 1087 | cxl_p1_write(adapter, CXL_PSL_ErrIVTE, CXL_PSL_ErrIVTE_tberror); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1088 | return cxl_tlb_slb_invalidate(adapter); |
| 1089 | } |
| 1090 | |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1091 | /* This should contain *only* operations that can safely be done in |
| 1092 | * both creation and recovery. |
| 1093 | */ |
| 1094 | static int cxl_configure_adapter(struct cxl *adapter, struct pci_dev *dev) |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1095 | { |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1096 | int rc; |
| 1097 | |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1098 | adapter->dev.parent = &dev->dev; |
| 1099 | adapter->dev.release = cxl_release_adapter; |
| 1100 | pci_set_drvdata(dev, adapter); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1101 | |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1102 | rc = pci_enable_device(dev); |
| 1103 | if (rc) { |
| 1104 | dev_err(&dev->dev, "pci_enable_device failed: %i\n", rc); |
| 1105 | return rc; |
| 1106 | } |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1107 | |
Ian Munsie | bee30c7 | 2015-05-27 16:07:04 +1000 | [diff] [blame] | 1108 | if ((rc = cxl_read_vsec(adapter, dev))) |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1109 | return rc; |
Ian Munsie | bee30c7 | 2015-05-27 16:07:04 +1000 | [diff] [blame] | 1110 | |
| 1111 | if ((rc = cxl_vsec_looks_ok(adapter, dev))) |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1112 | return rc; |
Ian Munsie | bee30c7 | 2015-05-27 16:07:04 +1000 | [diff] [blame] | 1113 | |
Philippe Bergheaud | d79e680 | 2015-10-02 15:23:33 +1000 | [diff] [blame] | 1114 | cxl_fixup_malformed_tlp(adapter, dev); |
| 1115 | |
Ian Munsie | bee30c7 | 2015-05-27 16:07:04 +1000 | [diff] [blame] | 1116 | if ((rc = setup_cxl_bars(dev))) |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1117 | return rc; |
Ian Munsie | bee30c7 | 2015-05-27 16:07:04 +1000 | [diff] [blame] | 1118 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1119 | if ((rc = switch_card_to_cxl(dev))) |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1120 | return rc; |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1121 | |
Ryan Grimm | 4beb542 | 2015-01-19 11:52:48 -0600 | [diff] [blame] | 1122 | if ((rc = cxl_update_image_control(adapter))) |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1123 | return rc; |
Ryan Grimm | 4beb542 | 2015-01-19 11:52:48 -0600 | [diff] [blame] | 1124 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1125 | if ((rc = cxl_map_adapter_regs(adapter, dev))) |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1126 | return rc; |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1127 | |
| 1128 | if ((rc = sanitise_adapter_regs(adapter))) |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1129 | goto err; |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1130 | |
| 1131 | if ((rc = init_implementation_adapter_regs(adapter, dev))) |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1132 | goto err; |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1133 | |
Ryan Grimm | 1212aa1 | 2015-01-19 11:52:50 -0600 | [diff] [blame] | 1134 | if ((rc = pnv_phb_to_cxl_mode(dev, OPAL_PHB_CAPI_MODE_CAPI))) |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1135 | goto err; |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1136 | |
Ryan Grimm | 1212aa1 | 2015-01-19 11:52:50 -0600 | [diff] [blame] | 1137 | /* If recovery happened, the last step is to turn on snooping. |
| 1138 | * In the non-recovery case this has no effect */ |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1139 | if ((rc = pnv_phb_to_cxl_mode(dev, OPAL_PHB_CAPI_MODE_SNOOP_ON))) |
| 1140 | goto err; |
Ryan Grimm | 1212aa1 | 2015-01-19 11:52:50 -0600 | [diff] [blame] | 1141 | |
Philippe Bergheaud | 390fd59 | 2015-08-28 09:37:36 +0200 | [diff] [blame] | 1142 | if ((rc = cxl_setup_psl_timebase(adapter, dev))) |
| 1143 | goto err; |
| 1144 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 1145 | if ((rc = cxl_native_register_psl_err_irq(adapter))) |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1146 | goto err; |
| 1147 | |
| 1148 | return 0; |
| 1149 | |
| 1150 | err: |
| 1151 | cxl_unmap_adapter_regs(adapter); |
| 1152 | return rc; |
| 1153 | |
| 1154 | } |
| 1155 | |
| 1156 | static void cxl_deconfigure_adapter(struct cxl *adapter) |
| 1157 | { |
| 1158 | struct pci_dev *pdev = to_pci_dev(adapter->dev.parent); |
| 1159 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 1160 | cxl_native_release_psl_err_irq(adapter); |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1161 | cxl_unmap_adapter_regs(adapter); |
| 1162 | |
| 1163 | pci_disable_device(pdev); |
| 1164 | } |
| 1165 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 1166 | static struct cxl *cxl_pci_init_adapter(struct pci_dev *dev) |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1167 | { |
| 1168 | struct cxl *adapter; |
| 1169 | int rc; |
| 1170 | |
| 1171 | adapter = cxl_alloc_adapter(); |
| 1172 | if (!adapter) |
| 1173 | return ERR_PTR(-ENOMEM); |
| 1174 | |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 1175 | adapter->native = kzalloc(sizeof(struct cxl_native), GFP_KERNEL); |
| 1176 | if (!adapter->native) { |
| 1177 | rc = -ENOMEM; |
| 1178 | goto err_release; |
| 1179 | } |
| 1180 | |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1181 | /* Set defaults for parameters which need to persist over |
| 1182 | * configure/reconfigure |
| 1183 | */ |
| 1184 | adapter->perst_loads_image = true; |
Daniel Axtens | 13e68d8 | 2015-08-14 17:41:25 +1000 | [diff] [blame] | 1185 | adapter->perst_same_image = false; |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1186 | |
| 1187 | rc = cxl_configure_adapter(adapter, dev); |
| 1188 | if (rc) { |
| 1189 | pci_disable_device(dev); |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 1190 | goto err_release; |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1191 | } |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1192 | |
| 1193 | /* Don't care if this one fails: */ |
| 1194 | cxl_debugfs_adapter_add(adapter); |
| 1195 | |
| 1196 | /* |
| 1197 | * After we call this function we must not free the adapter directly, |
| 1198 | * even if it returns an error! |
| 1199 | */ |
| 1200 | if ((rc = cxl_register_adapter(adapter))) |
| 1201 | goto err_put1; |
| 1202 | |
| 1203 | if ((rc = cxl_sysfs_adapter_add(adapter))) |
| 1204 | goto err_put1; |
| 1205 | |
| 1206 | return adapter; |
| 1207 | |
| 1208 | err_put1: |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1209 | /* This should mirror cxl_remove_adapter, except without the |
| 1210 | * sysfs parts |
| 1211 | */ |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1212 | cxl_debugfs_adapter_remove(adapter); |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1213 | cxl_deconfigure_adapter(adapter); |
| 1214 | device_unregister(&adapter->dev); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1215 | return ERR_PTR(rc); |
Christophe Lombard | cbffa3a | 2016-03-04 12:26:35 +0100 | [diff] [blame^] | 1216 | |
| 1217 | err_release: |
| 1218 | cxl_release_adapter(&adapter->dev); |
| 1219 | return ERR_PTR(rc); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1220 | } |
| 1221 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 1222 | static void cxl_pci_remove_adapter(struct cxl *adapter) |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1223 | { |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1224 | pr_devel("cxl_remove_adapter\n"); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1225 | |
| 1226 | cxl_sysfs_adapter_remove(adapter); |
| 1227 | cxl_debugfs_adapter_remove(adapter); |
Daniel Axtens | c044c41 | 2015-08-14 17:41:22 +1000 | [diff] [blame] | 1228 | |
| 1229 | cxl_deconfigure_adapter(adapter); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1230 | |
| 1231 | device_unregister(&adapter->dev); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1232 | } |
| 1233 | |
| 1234 | static int cxl_probe(struct pci_dev *dev, const struct pci_device_id *id) |
| 1235 | { |
| 1236 | struct cxl *adapter; |
| 1237 | int slice; |
| 1238 | int rc; |
| 1239 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1240 | if (cxl_verbose) |
| 1241 | dump_cxl_config_space(dev); |
| 1242 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 1243 | adapter = cxl_pci_init_adapter(dev); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1244 | if (IS_ERR(adapter)) { |
| 1245 | dev_err(&dev->dev, "cxl_init_adapter failed: %li\n", PTR_ERR(adapter)); |
| 1246 | return PTR_ERR(adapter); |
| 1247 | } |
| 1248 | |
| 1249 | for (slice = 0; slice < adapter->slices; slice++) { |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 1250 | if ((rc = pci_init_afu(adapter, slice, dev))) { |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1251 | dev_err(&dev->dev, "AFU %i failed to initialise: %i\n", slice, rc); |
Daniel Axtens | d76427b | 2015-08-14 17:41:23 +1000 | [diff] [blame] | 1252 | continue; |
| 1253 | } |
| 1254 | |
| 1255 | rc = cxl_afu_select_best_mode(adapter->afu[slice]); |
| 1256 | if (rc) |
| 1257 | dev_err(&dev->dev, "AFU %i failed to start: %i\n", slice, rc); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1258 | } |
| 1259 | |
| 1260 | return 0; |
| 1261 | } |
| 1262 | |
| 1263 | static void cxl_remove(struct pci_dev *dev) |
| 1264 | { |
| 1265 | struct cxl *adapter = pci_get_drvdata(dev); |
Michael Neuling | 6f7f0b3 | 2015-05-27 16:07:18 +1000 | [diff] [blame] | 1266 | struct cxl_afu *afu; |
| 1267 | int i; |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1268 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1269 | /* |
| 1270 | * Lock to prevent someone grabbing a ref through the adapter list as |
| 1271 | * we are removing it |
| 1272 | */ |
Michael Neuling | 6f7f0b3 | 2015-05-27 16:07:18 +1000 | [diff] [blame] | 1273 | for (i = 0; i < adapter->slices; i++) { |
| 1274 | afu = adapter->afu[i]; |
| 1275 | cxl_pci_vphb_remove(afu); |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 1276 | cxl_pci_remove_afu(afu); |
Michael Neuling | 6f7f0b3 | 2015-05-27 16:07:18 +1000 | [diff] [blame] | 1277 | } |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 1278 | cxl_pci_remove_adapter(adapter); |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1279 | } |
| 1280 | |
Daniel Axtens | 9e8df8a | 2015-08-14 17:41:26 +1000 | [diff] [blame] | 1281 | static pci_ers_result_t cxl_vphb_error_detected(struct cxl_afu *afu, |
| 1282 | pci_channel_state_t state) |
| 1283 | { |
| 1284 | struct pci_dev *afu_dev; |
| 1285 | pci_ers_result_t result = PCI_ERS_RESULT_NEED_RESET; |
| 1286 | pci_ers_result_t afu_result = PCI_ERS_RESULT_NEED_RESET; |
| 1287 | |
| 1288 | /* There should only be one entry, but go through the list |
| 1289 | * anyway |
| 1290 | */ |
| 1291 | list_for_each_entry(afu_dev, &afu->phb->bus->devices, bus_list) { |
| 1292 | if (!afu_dev->driver) |
| 1293 | continue; |
| 1294 | |
| 1295 | afu_dev->error_state = state; |
| 1296 | |
| 1297 | if (afu_dev->driver->err_handler) |
| 1298 | afu_result = afu_dev->driver->err_handler->error_detected(afu_dev, |
| 1299 | state); |
| 1300 | /* Disconnect trumps all, NONE trumps NEED_RESET */ |
| 1301 | if (afu_result == PCI_ERS_RESULT_DISCONNECT) |
| 1302 | result = PCI_ERS_RESULT_DISCONNECT; |
| 1303 | else if ((afu_result == PCI_ERS_RESULT_NONE) && |
| 1304 | (result == PCI_ERS_RESULT_NEED_RESET)) |
| 1305 | result = PCI_ERS_RESULT_NONE; |
| 1306 | } |
| 1307 | return result; |
| 1308 | } |
| 1309 | |
| 1310 | static pci_ers_result_t cxl_pci_error_detected(struct pci_dev *pdev, |
| 1311 | pci_channel_state_t state) |
| 1312 | { |
| 1313 | struct cxl *adapter = pci_get_drvdata(pdev); |
| 1314 | struct cxl_afu *afu; |
| 1315 | pci_ers_result_t result = PCI_ERS_RESULT_NEED_RESET; |
| 1316 | int i; |
| 1317 | |
| 1318 | /* At this point, we could still have an interrupt pending. |
| 1319 | * Let's try to get them out of the way before they do |
| 1320 | * anything we don't like. |
| 1321 | */ |
| 1322 | schedule(); |
| 1323 | |
| 1324 | /* If we're permanently dead, give up. */ |
| 1325 | if (state == pci_channel_io_perm_failure) { |
| 1326 | /* Tell the AFU drivers; but we don't care what they |
| 1327 | * say, we're going away. |
| 1328 | */ |
| 1329 | for (i = 0; i < adapter->slices; i++) { |
| 1330 | afu = adapter->afu[i]; |
| 1331 | cxl_vphb_error_detected(afu, state); |
| 1332 | } |
| 1333 | return PCI_ERS_RESULT_DISCONNECT; |
| 1334 | } |
| 1335 | |
| 1336 | /* Are we reflashing? |
| 1337 | * |
| 1338 | * If we reflash, we could come back as something entirely |
| 1339 | * different, including a non-CAPI card. As such, by default |
| 1340 | * we don't participate in the process. We'll be unbound and |
| 1341 | * the slot re-probed. (TODO: check EEH doesn't blindly rebind |
| 1342 | * us!) |
| 1343 | * |
| 1344 | * However, this isn't the entire story: for reliablity |
| 1345 | * reasons, we usually want to reflash the FPGA on PERST in |
| 1346 | * order to get back to a more reliable known-good state. |
| 1347 | * |
| 1348 | * This causes us a bit of a problem: if we reflash we can't |
| 1349 | * trust that we'll come back the same - we could have a new |
| 1350 | * image and been PERSTed in order to load that |
| 1351 | * image. However, most of the time we actually *will* come |
| 1352 | * back the same - for example a regular EEH event. |
| 1353 | * |
| 1354 | * Therefore, we allow the user to assert that the image is |
| 1355 | * indeed the same and that we should continue on into EEH |
| 1356 | * anyway. |
| 1357 | */ |
| 1358 | if (adapter->perst_loads_image && !adapter->perst_same_image) { |
| 1359 | /* TODO take the PHB out of CXL mode */ |
| 1360 | dev_info(&pdev->dev, "reflashing, so opting out of EEH!\n"); |
| 1361 | return PCI_ERS_RESULT_NONE; |
| 1362 | } |
| 1363 | |
| 1364 | /* |
| 1365 | * At this point, we want to try to recover. We'll always |
| 1366 | * need a complete slot reset: we don't trust any other reset. |
| 1367 | * |
| 1368 | * Now, we go through each AFU: |
| 1369 | * - We send the driver, if bound, an error_detected callback. |
| 1370 | * We expect it to clean up, but it can also tell us to give |
| 1371 | * up and permanently detach the card. To simplify things, if |
| 1372 | * any bound AFU driver doesn't support EEH, we give up on EEH. |
| 1373 | * |
| 1374 | * - We detach all contexts associated with the AFU. This |
| 1375 | * does not free them, but puts them into a CLOSED state |
| 1376 | * which causes any the associated files to return useful |
| 1377 | * errors to userland. It also unmaps, but does not free, |
| 1378 | * any IRQs. |
| 1379 | * |
| 1380 | * - We clean up our side: releasing and unmapping resources we hold |
| 1381 | * so we can wire them up again when the hardware comes back up. |
| 1382 | * |
| 1383 | * Driver authors should note: |
| 1384 | * |
| 1385 | * - Any contexts you create in your kernel driver (except |
| 1386 | * those associated with anonymous file descriptors) are |
| 1387 | * your responsibility to free and recreate. Likewise with |
| 1388 | * any attached resources. |
| 1389 | * |
| 1390 | * - We will take responsibility for re-initialising the |
| 1391 | * device context (the one set up for you in |
| 1392 | * cxl_pci_enable_device_hook and accessed through |
| 1393 | * cxl_get_context). If you've attached IRQs or other |
| 1394 | * resources to it, they remains yours to free. |
| 1395 | * |
| 1396 | * You can call the same functions to release resources as you |
| 1397 | * normally would: we make sure that these functions continue |
| 1398 | * to work when the hardware is down. |
| 1399 | * |
| 1400 | * Two examples: |
| 1401 | * |
| 1402 | * 1) If you normally free all your resources at the end of |
| 1403 | * each request, or if you use anonymous FDs, your |
| 1404 | * error_detected callback can simply set a flag to tell |
| 1405 | * your driver not to start any new calls. You can then |
| 1406 | * clear the flag in the resume callback. |
| 1407 | * |
| 1408 | * 2) If you normally allocate your resources on startup: |
| 1409 | * * Set a flag in error_detected as above. |
| 1410 | * * Let CXL detach your contexts. |
| 1411 | * * In slot_reset, free the old resources and allocate new ones. |
| 1412 | * * In resume, clear the flag to allow things to start. |
| 1413 | */ |
| 1414 | for (i = 0; i < adapter->slices; i++) { |
| 1415 | afu = adapter->afu[i]; |
| 1416 | |
| 1417 | result = cxl_vphb_error_detected(afu, state); |
| 1418 | |
| 1419 | /* Only continue if everyone agrees on NEED_RESET */ |
| 1420 | if (result != PCI_ERS_RESULT_NEED_RESET) |
| 1421 | return result; |
| 1422 | |
| 1423 | cxl_context_detach_all(afu); |
Frederic Barrat | 5be587b | 2016-03-04 12:26:28 +0100 | [diff] [blame] | 1424 | cxl_ops->afu_deactivate_mode(afu, afu->current_mode); |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 1425 | pci_deconfigure_afu(afu); |
Daniel Axtens | 9e8df8a | 2015-08-14 17:41:26 +1000 | [diff] [blame] | 1426 | } |
| 1427 | cxl_deconfigure_adapter(adapter); |
| 1428 | |
| 1429 | return result; |
| 1430 | } |
| 1431 | |
| 1432 | static pci_ers_result_t cxl_pci_slot_reset(struct pci_dev *pdev) |
| 1433 | { |
| 1434 | struct cxl *adapter = pci_get_drvdata(pdev); |
| 1435 | struct cxl_afu *afu; |
| 1436 | struct cxl_context *ctx; |
| 1437 | struct pci_dev *afu_dev; |
| 1438 | pci_ers_result_t afu_result = PCI_ERS_RESULT_RECOVERED; |
| 1439 | pci_ers_result_t result = PCI_ERS_RESULT_RECOVERED; |
| 1440 | int i; |
| 1441 | |
| 1442 | if (cxl_configure_adapter(adapter, pdev)) |
| 1443 | goto err; |
| 1444 | |
| 1445 | for (i = 0; i < adapter->slices; i++) { |
| 1446 | afu = adapter->afu[i]; |
| 1447 | |
Frederic Barrat | 2b04cf3 | 2016-03-04 12:26:29 +0100 | [diff] [blame] | 1448 | if (pci_configure_afu(afu, adapter, pdev)) |
Daniel Axtens | 9e8df8a | 2015-08-14 17:41:26 +1000 | [diff] [blame] | 1449 | goto err; |
| 1450 | |
| 1451 | if (cxl_afu_select_best_mode(afu)) |
| 1452 | goto err; |
| 1453 | |
| 1454 | cxl_pci_vphb_reconfigure(afu); |
| 1455 | |
| 1456 | list_for_each_entry(afu_dev, &afu->phb->bus->devices, bus_list) { |
| 1457 | /* Reset the device context. |
| 1458 | * TODO: make this less disruptive |
| 1459 | */ |
| 1460 | ctx = cxl_get_context(afu_dev); |
| 1461 | |
| 1462 | if (ctx && cxl_release_context(ctx)) |
| 1463 | goto err; |
| 1464 | |
| 1465 | ctx = cxl_dev_context_init(afu_dev); |
| 1466 | if (!ctx) |
| 1467 | goto err; |
| 1468 | |
| 1469 | afu_dev->dev.archdata.cxl_ctx = ctx; |
| 1470 | |
Frederic Barrat | 5be587b | 2016-03-04 12:26:28 +0100 | [diff] [blame] | 1471 | if (cxl_ops->afu_check_and_enable(afu)) |
Daniel Axtens | 9e8df8a | 2015-08-14 17:41:26 +1000 | [diff] [blame] | 1472 | goto err; |
| 1473 | |
| 1474 | afu_dev->error_state = pci_channel_io_normal; |
| 1475 | |
| 1476 | /* If there's a driver attached, allow it to |
| 1477 | * chime in on recovery. Drivers should check |
| 1478 | * if everything has come back OK, but |
| 1479 | * shouldn't start new work until we call |
| 1480 | * their resume function. |
| 1481 | */ |
| 1482 | if (!afu_dev->driver) |
| 1483 | continue; |
| 1484 | |
| 1485 | if (afu_dev->driver->err_handler && |
| 1486 | afu_dev->driver->err_handler->slot_reset) |
| 1487 | afu_result = afu_dev->driver->err_handler->slot_reset(afu_dev); |
| 1488 | |
| 1489 | if (afu_result == PCI_ERS_RESULT_DISCONNECT) |
| 1490 | result = PCI_ERS_RESULT_DISCONNECT; |
| 1491 | } |
| 1492 | } |
| 1493 | return result; |
| 1494 | |
| 1495 | err: |
| 1496 | /* All the bits that happen in both error_detected and cxl_remove |
| 1497 | * should be idempotent, so we don't need to worry about leaving a mix |
| 1498 | * of unconfigured and reconfigured resources. |
| 1499 | */ |
| 1500 | dev_err(&pdev->dev, "EEH recovery failed. Asking to be disconnected.\n"); |
| 1501 | return PCI_ERS_RESULT_DISCONNECT; |
| 1502 | } |
| 1503 | |
| 1504 | static void cxl_pci_resume(struct pci_dev *pdev) |
| 1505 | { |
| 1506 | struct cxl *adapter = pci_get_drvdata(pdev); |
| 1507 | struct cxl_afu *afu; |
| 1508 | struct pci_dev *afu_dev; |
| 1509 | int i; |
| 1510 | |
| 1511 | /* Everything is back now. Drivers should restart work now. |
| 1512 | * This is not the place to be checking if everything came back up |
| 1513 | * properly, because there's no return value: do that in slot_reset. |
| 1514 | */ |
| 1515 | for (i = 0; i < adapter->slices; i++) { |
| 1516 | afu = adapter->afu[i]; |
| 1517 | |
| 1518 | list_for_each_entry(afu_dev, &afu->phb->bus->devices, bus_list) { |
| 1519 | if (afu_dev->driver && afu_dev->driver->err_handler && |
| 1520 | afu_dev->driver->err_handler->resume) |
| 1521 | afu_dev->driver->err_handler->resume(afu_dev); |
| 1522 | } |
| 1523 | } |
| 1524 | } |
| 1525 | |
| 1526 | static const struct pci_error_handlers cxl_err_handler = { |
| 1527 | .error_detected = cxl_pci_error_detected, |
| 1528 | .slot_reset = cxl_pci_slot_reset, |
| 1529 | .resume = cxl_pci_resume, |
| 1530 | }; |
| 1531 | |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1532 | struct pci_driver cxl_pci_driver = { |
| 1533 | .name = "cxl-pci", |
| 1534 | .id_table = cxl_pci_tbl, |
| 1535 | .probe = cxl_probe, |
| 1536 | .remove = cxl_remove, |
Michael Neuling | aa70775 | 2015-05-27 16:07:02 +1000 | [diff] [blame] | 1537 | .shutdown = cxl_remove, |
Daniel Axtens | 9e8df8a | 2015-08-14 17:41:26 +1000 | [diff] [blame] | 1538 | .err_handler = &cxl_err_handler, |
Ian Munsie | f204e0b | 2014-10-08 19:55:02 +1100 | [diff] [blame] | 1539 | }; |