1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * IBM Accelerator Family 'GenWQE' 4 * 5 * (C) Copyright IBM Corp. 2013 6 * 7 * Author: Frank Haverkamp <haver@linux.vnet.ibm.com> 8 * Author: Joerg-Stephan Vogt <jsvogt@de.ibm.com> 9 * Author: Michael Jung <mijung@gmx.net> 10 * Author: Michael Ruettger <michael@ibmra.de> 11 */ 12 13 /* 14 * Debugfs interfaces for the GenWQE card. Help to debug potential 15 * problems. Dump internal chip state for debugging and failure 16 * determination. 17 */ 18 19 #include <linux/module.h> 20 #include <linux/kernel.h> 21 #include <linux/debugfs.h> 22 #include <linux/seq_file.h> 23 #include <linux/uaccess.h> 24 25 #include "card_base.h" 26 #include "card_ddcb.h" 27 dbg_uidn_show(struct seq_file * s,struct genwqe_reg * regs,int entries)28 static void dbg_uidn_show(struct seq_file *s, struct genwqe_reg *regs, 29 int entries) 30 { 31 unsigned int i; 32 u32 v_hi, v_lo; 33 34 for (i = 0; i < entries; i++) { 35 v_hi = (regs[i].val >> 32) & 0xffffffff; 36 v_lo = (regs[i].val) & 0xffffffff; 37 38 seq_printf(s, " 0x%08x 0x%08x 0x%08x 0x%08x EXT_ERR_REC\n", 39 regs[i].addr, regs[i].idx, v_hi, v_lo); 40 } 41 } 42 curr_dbg_uidn_show(struct seq_file * s,void * unused,int uid)43 static int curr_dbg_uidn_show(struct seq_file *s, void *unused, int uid) 44 { 45 struct genwqe_dev *cd = s->private; 46 int entries; 47 struct genwqe_reg *regs; 48 49 entries = genwqe_ffdc_buff_size(cd, uid); 50 if (entries < 0) 51 return -EINVAL; 52 53 if (entries == 0) 54 return 0; 55 56 regs = kcalloc(entries, sizeof(*regs), GFP_KERNEL); 57 if (regs == NULL) 58 return -ENOMEM; 59 60 genwqe_stop_traps(cd); /* halt the traps while dumping data */ 61 genwqe_ffdc_buff_read(cd, uid, regs, entries); 62 genwqe_start_traps(cd); 63 64 dbg_uidn_show(s, regs, entries); 65 kfree(regs); 66 return 0; 67 } 68 curr_dbg_uid0_show(struct seq_file * s,void * unused)69 static int curr_dbg_uid0_show(struct seq_file *s, void *unused) 70 { 71 return curr_dbg_uidn_show(s, unused, 0); 72 } 73 74 DEFINE_SHOW_ATTRIBUTE(curr_dbg_uid0); 75 curr_dbg_uid1_show(struct seq_file * s,void * unused)76 static int curr_dbg_uid1_show(struct seq_file *s, void *unused) 77 { 78 return curr_dbg_uidn_show(s, unused, 1); 79 } 80 81 DEFINE_SHOW_ATTRIBUTE(curr_dbg_uid1); 82 curr_dbg_uid2_show(struct seq_file * s,void * unused)83 static int curr_dbg_uid2_show(struct seq_file *s, void *unused) 84 { 85 return curr_dbg_uidn_show(s, unused, 2); 86 } 87 88 DEFINE_SHOW_ATTRIBUTE(curr_dbg_uid2); 89 prev_dbg_uidn_show(struct seq_file * s,void * unused,int uid)90 static int prev_dbg_uidn_show(struct seq_file *s, void *unused, int uid) 91 { 92 struct genwqe_dev *cd = s->private; 93 94 dbg_uidn_show(s, cd->ffdc[uid].regs, cd->ffdc[uid].entries); 95 return 0; 96 } 97 prev_dbg_uid0_show(struct seq_file * s,void * unused)98 static int prev_dbg_uid0_show(struct seq_file *s, void *unused) 99 { 100 return prev_dbg_uidn_show(s, unused, 0); 101 } 102 103 DEFINE_SHOW_ATTRIBUTE(prev_dbg_uid0); 104 prev_dbg_uid1_show(struct seq_file * s,void * unused)105 static int prev_dbg_uid1_show(struct seq_file *s, void *unused) 106 { 107 return prev_dbg_uidn_show(s, unused, 1); 108 } 109 110 DEFINE_SHOW_ATTRIBUTE(prev_dbg_uid1); 111 prev_dbg_uid2_show(struct seq_file * s,void * unused)112 static int prev_dbg_uid2_show(struct seq_file *s, void *unused) 113 { 114 return prev_dbg_uidn_show(s, unused, 2); 115 } 116 117 DEFINE_SHOW_ATTRIBUTE(prev_dbg_uid2); 118 curr_regs_show(struct seq_file * s,void * unused)119 static int curr_regs_show(struct seq_file *s, void *unused) 120 { 121 struct genwqe_dev *cd = s->private; 122 unsigned int i; 123 struct genwqe_reg *regs; 124 125 regs = kcalloc(GENWQE_FFDC_REGS, sizeof(*regs), GFP_KERNEL); 126 if (regs == NULL) 127 return -ENOMEM; 128 129 genwqe_stop_traps(cd); 130 genwqe_read_ffdc_regs(cd, regs, GENWQE_FFDC_REGS, 1); 131 genwqe_start_traps(cd); 132 133 for (i = 0; i < GENWQE_FFDC_REGS; i++) { 134 if (regs[i].addr == 0xffffffff) 135 break; /* invalid entries */ 136 137 if (regs[i].val == 0x0ull) 138 continue; /* do not print 0x0 FIRs */ 139 140 seq_printf(s, " 0x%08x 0x%016llx\n", 141 regs[i].addr, regs[i].val); 142 } 143 return 0; 144 } 145 146 DEFINE_SHOW_ATTRIBUTE(curr_regs); 147 prev_regs_show(struct seq_file * s,void * unused)148 static int prev_regs_show(struct seq_file *s, void *unused) 149 { 150 struct genwqe_dev *cd = s->private; 151 unsigned int i; 152 struct genwqe_reg *regs = cd->ffdc[GENWQE_DBG_REGS].regs; 153 154 if (regs == NULL) 155 return -EINVAL; 156 157 for (i = 0; i < GENWQE_FFDC_REGS; i++) { 158 if (regs[i].addr == 0xffffffff) 159 break; /* invalid entries */ 160 161 if (regs[i].val == 0x0ull) 162 continue; /* do not print 0x0 FIRs */ 163 164 seq_printf(s, " 0x%08x 0x%016llx\n", 165 regs[i].addr, regs[i].val); 166 } 167 return 0; 168 } 169 170 DEFINE_SHOW_ATTRIBUTE(prev_regs); 171 jtimer_show(struct seq_file * s,void * unused)172 static int jtimer_show(struct seq_file *s, void *unused) 173 { 174 struct genwqe_dev *cd = s->private; 175 unsigned int vf_num; 176 u64 jtimer; 177 178 jtimer = genwqe_read_vreg(cd, IO_SLC_VF_APPJOB_TIMEOUT, 0); 179 seq_printf(s, " PF 0x%016llx %d msec\n", jtimer, 180 GENWQE_PF_JOBTIMEOUT_MSEC); 181 182 for (vf_num = 0; vf_num < cd->num_vfs; vf_num++) { 183 jtimer = genwqe_read_vreg(cd, IO_SLC_VF_APPJOB_TIMEOUT, 184 vf_num + 1); 185 seq_printf(s, " VF%-2d 0x%016llx %d msec\n", vf_num, jtimer, 186 cd->vf_jobtimeout_msec[vf_num]); 187 } 188 return 0; 189 } 190 191 DEFINE_SHOW_ATTRIBUTE(jtimer); 192 queue_working_time_show(struct seq_file * s,void * unused)193 static int queue_working_time_show(struct seq_file *s, void *unused) 194 { 195 struct genwqe_dev *cd = s->private; 196 unsigned int vf_num; 197 u64 t; 198 199 t = genwqe_read_vreg(cd, IO_SLC_VF_QUEUE_WTIME, 0); 200 seq_printf(s, " PF 0x%016llx\n", t); 201 202 for (vf_num = 0; vf_num < cd->num_vfs; vf_num++) { 203 t = genwqe_read_vreg(cd, IO_SLC_VF_QUEUE_WTIME, vf_num + 1); 204 seq_printf(s, " VF%-2d 0x%016llx\n", vf_num, t); 205 } 206 return 0; 207 } 208 209 DEFINE_SHOW_ATTRIBUTE(queue_working_time); 210 ddcb_info_show(struct seq_file * s,void * unused)211 static int ddcb_info_show(struct seq_file *s, void *unused) 212 { 213 struct genwqe_dev *cd = s->private; 214 unsigned int i; 215 struct ddcb_queue *queue; 216 struct ddcb *pddcb; 217 218 queue = &cd->queue; 219 seq_puts(s, "DDCB QUEUE:\n"); 220 seq_printf(s, " ddcb_max: %d\n" 221 " ddcb_daddr: %016llx - %016llx\n" 222 " ddcb_vaddr: %p\n" 223 " ddcbs_in_flight: %u\n" 224 " ddcbs_max_in_flight: %u\n" 225 " ddcbs_completed: %u\n" 226 " return_on_busy: %u\n" 227 " wait_on_busy: %u\n" 228 " irqs_processed: %u\n", 229 queue->ddcb_max, (long long)queue->ddcb_daddr, 230 (long long)queue->ddcb_daddr + 231 (queue->ddcb_max * DDCB_LENGTH), 232 queue->ddcb_vaddr, queue->ddcbs_in_flight, 233 queue->ddcbs_max_in_flight, queue->ddcbs_completed, 234 queue->return_on_busy, queue->wait_on_busy, 235 cd->irqs_processed); 236 237 /* Hardware State */ 238 seq_printf(s, " 0x%08x 0x%016llx IO_QUEUE_CONFIG\n" 239 " 0x%08x 0x%016llx IO_QUEUE_STATUS\n" 240 " 0x%08x 0x%016llx IO_QUEUE_SEGMENT\n" 241 " 0x%08x 0x%016llx IO_QUEUE_INITSQN\n" 242 " 0x%08x 0x%016llx IO_QUEUE_WRAP\n" 243 " 0x%08x 0x%016llx IO_QUEUE_OFFSET\n" 244 " 0x%08x 0x%016llx IO_QUEUE_WTIME\n" 245 " 0x%08x 0x%016llx IO_QUEUE_ERRCNTS\n" 246 " 0x%08x 0x%016llx IO_QUEUE_LRW\n", 247 queue->IO_QUEUE_CONFIG, 248 __genwqe_readq(cd, queue->IO_QUEUE_CONFIG), 249 queue->IO_QUEUE_STATUS, 250 __genwqe_readq(cd, queue->IO_QUEUE_STATUS), 251 queue->IO_QUEUE_SEGMENT, 252 __genwqe_readq(cd, queue->IO_QUEUE_SEGMENT), 253 queue->IO_QUEUE_INITSQN, 254 __genwqe_readq(cd, queue->IO_QUEUE_INITSQN), 255 queue->IO_QUEUE_WRAP, 256 __genwqe_readq(cd, queue->IO_QUEUE_WRAP), 257 queue->IO_QUEUE_OFFSET, 258 __genwqe_readq(cd, queue->IO_QUEUE_OFFSET), 259 queue->IO_QUEUE_WTIME, 260 __genwqe_readq(cd, queue->IO_QUEUE_WTIME), 261 queue->IO_QUEUE_ERRCNTS, 262 __genwqe_readq(cd, queue->IO_QUEUE_ERRCNTS), 263 queue->IO_QUEUE_LRW, 264 __genwqe_readq(cd, queue->IO_QUEUE_LRW)); 265 266 seq_printf(s, "DDCB list (ddcb_act=%d/ddcb_next=%d):\n", 267 queue->ddcb_act, queue->ddcb_next); 268 269 pddcb = queue->ddcb_vaddr; 270 for (i = 0; i < queue->ddcb_max; i++) { 271 seq_printf(s, " %-3d: RETC=%03x SEQ=%04x HSI/SHI=%02x/%02x ", 272 i, be16_to_cpu(pddcb->retc_16), 273 be16_to_cpu(pddcb->seqnum_16), 274 pddcb->hsi, pddcb->shi); 275 seq_printf(s, "PRIV=%06llx CMD=%02x\n", 276 be64_to_cpu(pddcb->priv_64), pddcb->cmd); 277 pddcb++; 278 } 279 return 0; 280 } 281 282 DEFINE_SHOW_ATTRIBUTE(ddcb_info); 283 info_show(struct seq_file * s,void * unused)284 static int info_show(struct seq_file *s, void *unused) 285 { 286 struct genwqe_dev *cd = s->private; 287 u64 app_id, slu_id, bitstream = -1; 288 struct pci_dev *pci_dev = cd->pci_dev; 289 290 slu_id = __genwqe_readq(cd, IO_SLU_UNITCFG); 291 app_id = __genwqe_readq(cd, IO_APP_UNITCFG); 292 293 if (genwqe_is_privileged(cd)) 294 bitstream = __genwqe_readq(cd, IO_SLU_BITSTREAM); 295 296 seq_printf(s, "%s driver version: %s\n" 297 " Device Name/Type: %s %s CardIdx: %d\n" 298 " SLU/APP Config : 0x%016llx/0x%016llx\n" 299 " Build Date : %u/%x/%u\n" 300 " Base Clock : %u MHz\n" 301 " Arch/SVN Release: %u/%llx\n" 302 " Bitstream : %llx\n", 303 GENWQE_DEVNAME, DRV_VERSION, dev_name(&pci_dev->dev), 304 genwqe_is_privileged(cd) ? 305 "Physical" : "Virtual or no SR-IOV", 306 cd->card_idx, slu_id, app_id, 307 (u16)((slu_id >> 12) & 0x0fLLU), /* month */ 308 (u16)((slu_id >> 4) & 0xffLLU), /* day */ 309 (u16)((slu_id >> 16) & 0x0fLLU) + 2010, /* year */ 310 genwqe_base_clock_frequency(cd), 311 (u16)((slu_id >> 32) & 0xffLLU), slu_id >> 40, 312 bitstream); 313 314 return 0; 315 } 316 317 DEFINE_SHOW_ATTRIBUTE(info); 318 genwqe_init_debugfs(struct genwqe_dev * cd)319 void genwqe_init_debugfs(struct genwqe_dev *cd) 320 { 321 struct dentry *root; 322 char card_name[64]; 323 char name[64]; 324 unsigned int i; 325 326 sprintf(card_name, "%s%d_card", GENWQE_DEVNAME, cd->card_idx); 327 328 root = debugfs_create_dir(card_name, cd->debugfs_genwqe); 329 330 /* non privileged interfaces are done here */ 331 debugfs_create_file("ddcb_info", S_IRUGO, root, cd, &ddcb_info_fops); 332 debugfs_create_file("info", S_IRUGO, root, cd, &info_fops); 333 debugfs_create_x64("err_inject", 0666, root, &cd->err_inject); 334 debugfs_create_u32("ddcb_software_timeout", 0666, root, 335 &cd->ddcb_software_timeout); 336 debugfs_create_u32("kill_timeout", 0666, root, &cd->kill_timeout); 337 338 /* privileged interfaces follow here */ 339 if (!genwqe_is_privileged(cd)) { 340 cd->debugfs_root = root; 341 return; 342 } 343 344 debugfs_create_file("curr_regs", S_IRUGO, root, cd, &curr_regs_fops); 345 debugfs_create_file("curr_dbg_uid0", S_IRUGO, root, cd, 346 &curr_dbg_uid0_fops); 347 debugfs_create_file("curr_dbg_uid1", S_IRUGO, root, cd, 348 &curr_dbg_uid1_fops); 349 debugfs_create_file("curr_dbg_uid2", S_IRUGO, root, cd, 350 &curr_dbg_uid2_fops); 351 debugfs_create_file("prev_regs", S_IRUGO, root, cd, &prev_regs_fops); 352 debugfs_create_file("prev_dbg_uid0", S_IRUGO, root, cd, 353 &prev_dbg_uid0_fops); 354 debugfs_create_file("prev_dbg_uid1", S_IRUGO, root, cd, 355 &prev_dbg_uid1_fops); 356 debugfs_create_file("prev_dbg_uid2", S_IRUGO, root, cd, 357 &prev_dbg_uid2_fops); 358 359 for (i = 0; i < GENWQE_MAX_VFS; i++) { 360 sprintf(name, "vf%u_jobtimeout_msec", i); 361 debugfs_create_u32(name, 0666, root, 362 &cd->vf_jobtimeout_msec[i]); 363 } 364 365 debugfs_create_file("jobtimer", S_IRUGO, root, cd, &jtimer_fops); 366 debugfs_create_file("queue_working_time", S_IRUGO, root, cd, 367 &queue_working_time_fops); 368 debugfs_create_u32("skip_recovery", 0666, root, &cd->skip_recovery); 369 debugfs_create_u32("use_platform_recovery", 0666, root, 370 &cd->use_platform_recovery); 371 372 cd->debugfs_root = root; 373 } 374 genqwe_exit_debugfs(struct genwqe_dev * cd)375 void genqwe_exit_debugfs(struct genwqe_dev *cd) 376 { 377 debugfs_remove_recursive(cd->debugfs_root); 378 } 379