drivers/crypto/cavium/cpt/cptpf_main.c

   1 /*
   2  * Copyright (C) 2016 Cavium, Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of version 2 of the GNU General Public License
   6  * as published by the Free Software Foundation.
   7  */
   8
   9 #include <linux/device.h>
  10 #include <linux/firmware.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/module.h>
  13 #include <linux/moduleparam.h>
  14 #include <linux/pci.h>
  15 #include <linux/printk.h>
  16 #include <linux/version.h>
  17
  18 #include "cptpf.h"
  19
  20 #define DRV_NAME        "thunder-cpt"
  21 #define DRV_VERSION     "1.0"
  22
  23 static u32 num_vfs = 4; /* Default 4 VF enabled */
  24 module_param(num_vfs, uint, 0444);
  25 MODULE_PARM_DESC(num_vfs, "Number of VFs to enable(1-16)");
  26
  27 /*
  28  * Disable cores specified by coremask
  29  */
  30 static void cpt_disable_cores(struct cpt_device *cpt, u64 coremask,
  31                               u8 type, u8 grp)
  32 {
  33         u64 pf_exe_ctl;
  34         u32 timeout = 100;
  35         u64 grpmask = 0;
  36         struct device *dev = &cpt->pdev->dev;
  37
  38         if (type == AE_TYPES)
  39                 coremask = (coremask << cpt->max_se_cores);
  40
  41         /* Disengage the cores from groups */
  42         grpmask = cpt_read_csr64(cpt->reg_base, CPTX_PF_GX_EN(0, grp));
  43         cpt_write_csr64(cpt->reg_base, CPTX_PF_GX_EN(0, grp),
  44                         (grpmask & ~coremask));
  45         udelay(CSR_DELAY);
  46         grp = cpt_read_csr64(cpt->reg_base, CPTX_PF_EXEC_BUSY(0));
  47         while (grp & coremask) {
  48                 dev_err(dev, "Cores still busy %llx", coremask);
  49                 grp = cpt_read_csr64(cpt->reg_base,
  50                                      CPTX_PF_EXEC_BUSY(0));
  51                 if (timeout--)
  52                         break;
  53
  54                 udelay(CSR_DELAY);
  55         }
  56
  57         /* Disable the cores */
  58         pf_exe_ctl = cpt_read_csr64(cpt->reg_base, CPTX_PF_EXE_CTL(0));
  59         cpt_write_csr64(cpt->reg_base, CPTX_PF_EXE_CTL(0),
  60                         (pf_exe_ctl & ~coremask));
  61         udelay(CSR_DELAY);
  62 }
  63
  64 /*
  65  * Enable cores specified by coremask
  66  */
  67 static void cpt_enable_cores(struct cpt_device *cpt, u64 coremask,
  68                              u8 type)
  69 {
  70         u64 pf_exe_ctl;
  71
  72         if (type == AE_TYPES)
  73                 coremask = (coremask << cpt->max_se_cores);
  74
  75         pf_exe_ctl = cpt_read_csr64(cpt->reg_base, CPTX_PF_EXE_CTL(0));
  76         cpt_write_csr64(cpt->reg_base, CPTX_PF_EXE_CTL(0),
  77                         (pf_exe_ctl | coremask));
  78         udelay(CSR_DELAY);
  79 }
  80
  81 static void cpt_configure_group(struct cpt_device *cpt, u8 grp,
  82                                 u64 coremask, u8 type)
  83 {
  84         u64 pf_gx_en = 0;
  85
  86         if (type == AE_TYPES)
  87                 coremask = (coremask << cpt->max_se_cores);
  88
  89         pf_gx_en = cpt_read_csr64(cpt->reg_base, CPTX_PF_GX_EN(0, grp));
  90         cpt_write_csr64(cpt->reg_base, CPTX_PF_GX_EN(0, grp),
  91                         (pf_gx_en | coremask));
  92         udelay(CSR_DELAY);
  93 }
  94
  95 static void cpt_disable_mbox_interrupts(struct cpt_device *cpt)
  96 {
  97         /* Clear mbox(0) interupts for all vfs */
  98         cpt_write_csr64(cpt->reg_base, CPTX_PF_MBOX_ENA_W1CX(0, 0), ~0ull);
  99 }
 100
 101 static void cpt_disable_ecc_interrupts(struct cpt_device *cpt)
 102 {
 103         /* Clear ecc(0) interupts for all vfs */
 104         cpt_write_csr64(cpt->reg_base, CPTX_PF_ECC0_ENA_W1C(0), ~0ull);
 105 }
 106
 107 static void cpt_disable_exec_interrupts(struct cpt_device *cpt)
 108 {
 109         /* Clear exec interupts for all vfs */
 110         cpt_write_csr64(cpt->reg_base, CPTX_PF_EXEC_ENA_W1C(0), ~0ull);
 111 }
 112
 113 static void cpt_disable_all_interrupts(struct cpt_device *cpt)
 114 {
 115         cpt_disable_mbox_interrupts(cpt);
 116         cpt_disable_ecc_interrupts(cpt);
 117         cpt_disable_exec_interrupts(cpt);
 118 }
 119
 120 static void cpt_enable_mbox_interrupts(struct cpt_device *cpt)
 121 {
 122         /* Set mbox(0) interupts for all vfs */
 123         cpt_write_csr64(cpt->reg_base, CPTX_PF_MBOX_ENA_W1SX(0, 0), ~0ull);
 124 }
 125
 126 static int cpt_load_microcode(struct cpt_device *cpt, struct microcode *mcode)
 127 {
 128         int ret = 0, core = 0, shift = 0;
 129         u32 total_cores = 0;
 130         struct device *dev = &cpt->pdev->dev;
 131
 132         if (!mcode || !mcode->code) {
 133                 dev_err(dev, "Either the mcode is null or data is NULL\n");
 134                 return -EINVAL;
 135         }
 136
 137         if (mcode->code_size == 0) {
 138                 dev_err(dev, "microcode size is 0\n");
 139                 return -EINVAL;
 140         }
 141
 142         /* Assumes 0-9 are SE cores for UCODE_BASE registers and
 143          * AE core bases follow
 144          */
 145         if (mcode->is_ae) {
 146                 core = CPT_MAX_SE_CORES; /* start couting from 10 */
 147                 total_cores = CPT_MAX_TOTAL_CORES; /* upto 15 */
 148         } else {
 149                 core = 0; /* start couting from 0 */
 150                 total_cores = CPT_MAX_SE_CORES; /* upto 9 */
 151         }
 152
 153         /* Point to microcode for each core of the group */
 154         for (; core < total_cores ; core++, shift++) {
 155                 if (mcode->core_mask & (1 << shift)) {
 156                         cpt_write_csr64(cpt->reg_base,
 157                                         CPTX_PF_ENGX_UCODE_BASE(0, core),
 158                                         (u64)mcode->phys_base);
 159                 }
 160         }
 161         return ret;
 162 }
 163
 164 static int do_cpt_init(struct cpt_device *cpt, struct microcode *mcode)
 165 {
 166         int ret = 0;
 167         struct device *dev = &cpt->pdev->dev;
 168
 169         /* Make device not ready */
 170         cpt->flags &= ~CPT_FLAG_DEVICE_READY;
 171         /* Disable All PF interrupts */
 172         cpt_disable_all_interrupts(cpt);
 173         /* Calculate mcode group and coremasks */
 174         if (mcode->is_ae) {
 175                 if (mcode->num_cores > cpt->max_ae_cores) {
 176                         dev_err(dev, "Requested for more cores than available AE cores\n");
 177                         ret = -EINVAL;
 178                         goto cpt_init_fail;
 179                 }
 180
 181                 if (cpt->next_group >= CPT_MAX_CORE_GROUPS) {
 182                         dev_err(dev, "Can't load, all eight microcode groups in use");
 183                         return -ENFILE;
 184                 }
 185
 186                 mcode->group = cpt->next_group;
 187                 /* Convert requested cores to mask */
 188                 mcode->core_mask = GENMASK(mcode->num_cores, 0);
 189                 cpt_disable_cores(cpt, mcode->core_mask, AE_TYPES,
 190                                   mcode->group);
 191                 /* Load microcode for AE engines */
 192                 ret = cpt_load_microcode(cpt, mcode);
 193                 if (ret) {
 194                         dev_err(dev, "Microcode load Failed for %s\n",
 195                                 mcode->version);
 196                         goto cpt_init_fail;
 197                 }
 198                 cpt->next_group++;
 199                 /* Configure group mask for the mcode */
 200                 cpt_configure_group(cpt, mcode->group, mcode->core_mask,
 201                                     AE_TYPES);
 202                 /* Enable AE cores for the group mask */
 203                 cpt_enable_cores(cpt, mcode->core_mask, AE_TYPES);
 204         } else {
 205                 if (mcode->num_cores > cpt->max_se_cores) {
 206                         dev_err(dev, "Requested for more cores than available SE cores\n");
 207                         ret = -EINVAL;
 208                         goto cpt_init_fail;
 209                 }
 210                 if (cpt->next_group >= CPT_MAX_CORE_GROUPS) {
 211                         dev_err(dev, "Can't load, all eight microcode groups in use");
 212                         return -ENFILE;
 213                 }
 214
 215                 mcode->group = cpt->next_group;
 216                 /* Covert requested cores to mask */
 217                 mcode->core_mask = GENMASK(mcode->num_cores, 0);
 218                 cpt_disable_cores(cpt, mcode->core_mask, SE_TYPES,
 219                                   mcode->group);
 220                 /* Load microcode for SE engines */
 221                 ret = cpt_load_microcode(cpt, mcode);
 222                 if (ret) {
 223                         dev_err(dev, "Microcode load Failed for %s\n",
 224                                 mcode->version);
 225                         goto cpt_init_fail;
 226                 }
 227                 cpt->next_group++;
 228                 /* Configure group mask for the mcode */
 229                 cpt_configure_group(cpt, mcode->group, mcode->core_mask,
 230                                     SE_TYPES);
 231                 /* Enable SE cores for the group mask */
 232                 cpt_enable_cores(cpt, mcode->core_mask, SE_TYPES);
 233         }
 234
 235         /* Enabled PF mailbox interrupts */
 236         cpt_enable_mbox_interrupts(cpt);
 237         cpt->flags |= CPT_FLAG_DEVICE_READY;
 238
 239         return ret;
 240
 241 cpt_init_fail:
 242         /* Enabled PF mailbox interrupts */
 243         cpt_enable_mbox_interrupts(cpt);
 244
 245         return ret;
 246 }
 247
 248 struct ucode_header {
 249         u8 version[CPT_UCODE_VERSION_SZ];
 250         u32 code_length;
 251         u32 data_length;
 252         u64 sram_address;
 253 };
 254
 255 static int cpt_ucode_load_fw(struct cpt_device *cpt, const u8 *fw, bool is_ae)
 256 {
 257         const struct firmware *fw_entry;
 258         struct device *dev = &cpt->pdev->dev;
 259         struct ucode_header *ucode;
 260         struct microcode *mcode;
 261         int j, ret = 0;
 262
 263         ret = request_firmware(&fw_entry, fw, dev);
 264         if (ret)
 265                 return ret;
 266
 267         ucode = (struct ucode_header *)fw_entry->data;
 268         mcode = &cpt->mcode[cpt->next_mc_idx];
 269         memcpy(mcode->version, (u8 *)fw_entry->data, CPT_UCODE_VERSION_SZ);
 270         mcode->code_size = ntohl(ucode->code_length) * 2;
 271         if (!mcode->code_size) {
 272                 ret = -EINVAL;
 273                 goto fw_release;
 274         }
 275
 276         mcode->is_ae = is_ae;
 277         mcode->core_mask = 0ULL;
 278         mcode->num_cores = is_ae ? 6 : 10;
 279
 280         /*  Allocate DMAable space */
 281         mcode->code = dma_zalloc_coherent(&cpt->pdev->dev, mcode->code_size,
 282                                           &mcode->phys_base, GFP_KERNEL);
 283         if (!mcode->code) {
 284                 dev_err(dev, "Unable to allocate space for microcode");
 285                 ret = -ENOMEM;
 286                 goto fw_release;
 287         }
 288
 289         memcpy((void *)mcode->code, (void *)(fw_entry->data + sizeof(*ucode)),
 290                mcode->code_size);
 291
 292         /* Byte swap 64-bit */
 293         for (j = 0; j < (mcode->code_size / 8); j++)
 294                 ((u64 *)mcode->code)[j] = cpu_to_be64(((u64 *)mcode->code)[j]);
 295         /*  MC needs 16-bit swap */
 296         for (j = 0; j < (mcode->code_size / 2); j++)
 297                 ((u16 *)mcode->code)[j] = cpu_to_be16(((u16 *)mcode->code)[j]);
 298
 299         dev_dbg(dev, "mcode->code_size = %u\n", mcode->code_size);
 300         dev_dbg(dev, "mcode->is_ae = %u\n", mcode->is_ae);
 301         dev_dbg(dev, "mcode->num_cores = %u\n", mcode->num_cores);
 302         dev_dbg(dev, "mcode->code = %llx\n", (u64)mcode->code);
 303         dev_dbg(dev, "mcode->phys_base = %llx\n", mcode->phys_base);
 304
 305         ret = do_cpt_init(cpt, mcode);
 306         if (ret) {
 307                 dev_err(dev, "do_cpt_init failed with ret: %d\n", ret);
 308                 goto fw_release;
 309         }
 310
 311         dev_info(dev, "Microcode Loaded %s\n", mcode->version);
 312         mcode->is_mc_valid = 1;
 313         cpt->next_mc_idx++;
 314
 315 fw_release:
 316         release_firmware(fw_entry);
 317
 318         return ret;
 319 }
 320
 321 static int cpt_ucode_load(struct cpt_device *cpt)
 322 {
 323         int ret = 0;
 324         struct device *dev = &cpt->pdev->dev;
 325
 326         ret = cpt_ucode_load_fw(cpt, "cpt8x-mc-ae.out", true);
 327         if (ret) {
 328                 dev_err(dev, "ae:cpt_ucode_load failed with ret: %d\n", ret);
 329                 return ret;
 330         }
 331         ret = cpt_ucode_load_fw(cpt, "cpt8x-mc-se.out", false);
 332         if (ret) {
 333                 dev_err(dev, "se:cpt_ucode_load failed with ret: %d\n", ret);
 334                 return ret;
 335         }
 336
 337         return ret;
 338 }
 339
 340 static irqreturn_t cpt_mbx0_intr_handler(int irq, void *cpt_irq)
 341 {
 342         struct cpt_device *cpt = (struct cpt_device *)cpt_irq;
 343
 344         cpt_mbox_intr_handler(cpt, 0);
 345
 346         return IRQ_HANDLED;
 347 }
 348
 349 static void cpt_reset(struct cpt_device *cpt)
 350 {
 351         cpt_write_csr64(cpt->reg_base, CPTX_PF_RESET(0), 1);
 352 }
 353
 354 static void cpt_find_max_enabled_cores(struct cpt_device *cpt)
 355 {
 356         union cptx_pf_constants pf_cnsts = {0};
 357
 358         pf_cnsts.u = cpt_read_csr64(cpt->reg_base, CPTX_PF_CONSTANTS(0));
 359         cpt->max_se_cores = pf_cnsts.s.se;
 360         cpt->max_ae_cores = pf_cnsts.s.ae;
 361 }
 362
 363 static u32 cpt_check_bist_status(struct cpt_device *cpt)
 364 {
 365         union cptx_pf_bist_status bist_sts = {0};
 366
 367         bist_sts.u = cpt_read_csr64(cpt->reg_base,
 368                                     CPTX_PF_BIST_STATUS(0));
 369
 370         return bist_sts.u;
 371 }
 372
 373 static u64 cpt_check_exe_bist_status(struct cpt_device *cpt)
 374 {
 375         union cptx_pf_exe_bist_status bist_sts = {0};
 376
 377         bist_sts.u = cpt_read_csr64(cpt->reg_base,
 378                                     CPTX_PF_EXE_BIST_STATUS(0));
 379
 380         return bist_sts.u;
 381 }
 382
 383 static void cpt_disable_all_cores(struct cpt_device *cpt)
 384 {
 385         u32 grp, timeout = 100;
 386         struct device *dev = &cpt->pdev->dev;
 387
 388         /* Disengage the cores from groups */
 389         for (grp = 0; grp < CPT_MAX_CORE_GROUPS; grp++) {
 390                 cpt_write_csr64(cpt->reg_base, CPTX_PF_GX_EN(0, grp), 0);
 391                 udelay(CSR_DELAY);
 392         }
 393
 394         grp = cpt_read_csr64(cpt->reg_base, CPTX_PF_EXEC_BUSY(0));
 395         while (grp) {
 396                 dev_err(dev, "Cores still busy");
 397                 grp = cpt_read_csr64(cpt->reg_base,
 398                                      CPTX_PF_EXEC_BUSY(0));
 399                 if (timeout--)
 400                         break;
 401
 402                 udelay(CSR_DELAY);
 403         }
 404         /* Disable the cores */
 405         cpt_write_csr64(cpt->reg_base, CPTX_PF_EXE_CTL(0), 0);
 406 }
 407
 408 /**
 409  * Ensure all cores are disengaged from all groups by
 410  * calling cpt_disable_all_cores() before calling this
 411  * function.
 412  */
 413 static void cpt_unload_microcode(struct cpt_device *cpt)
 414 {
 415         u32 grp = 0, core;
 416
 417         /* Free microcode bases and reset group masks */
 418         for (grp = 0; grp < CPT_MAX_CORE_GROUPS; grp++) {
 419                 struct microcode *mcode = &cpt->mcode[grp];
 420
 421                 if (cpt->mcode[grp].code)
 422                         dma_free_coherent(&cpt->pdev->dev, mcode->code_size,
 423                                           mcode->code, mcode->phys_base);
 424                 mcode->code = NULL;
 425         }
 426         /* Clear UCODE_BASE registers for all engines */
 427         for (core = 0; core < CPT_MAX_TOTAL_CORES; core++)
 428                 cpt_write_csr64(cpt->reg_base,
 429                                 CPTX_PF_ENGX_UCODE_BASE(0, core), 0ull);
 430 }
 431
 432 static int cpt_device_init(struct cpt_device *cpt)
 433 {
 434         u64 bist;
 435         struct device *dev = &cpt->pdev->dev;
 436
 437         /* Reset the PF when probed first */
 438         cpt_reset(cpt);
 439         msleep(100);
 440
 441         /*Check BIST status*/
 442         bist = (u64)cpt_check_bist_status(cpt);
 443         if (bist) {
 444                 dev_err(dev, "RAM BIST failed with code 0x%llx", bist);
 445                 return -ENODEV;
 446         }
 447
 448         bist = cpt_check_exe_bist_status(cpt);
 449         if (bist) {
 450                 dev_err(dev, "Engine BIST failed with code 0x%llx", bist);
 451                 return -ENODEV;
 452         }
 453
 454         /*Get CLK frequency*/
 455         /*Get max enabled cores */
 456         cpt_find_max_enabled_cores(cpt);
 457         /*Disable all cores*/
 458         cpt_disable_all_cores(cpt);
 459         /*Reset device parameters*/
 460         cpt->next_mc_idx   = 0;
 461         cpt->next_group = 0;
 462         /* PF is ready */
 463         cpt->flags |= CPT_FLAG_DEVICE_READY;
 464
 465         return 0;
 466 }
 467
 468 static int cpt_register_interrupts(struct cpt_device *cpt)
 469 {
 470         int ret;
 471         struct device *dev = &cpt->pdev->dev;
 472
 473         /* Enable MSI-X */
 474         ret = pci_alloc_irq_vectors(cpt->pdev, CPT_PF_MSIX_VECTORS,
 475                         CPT_PF_MSIX_VECTORS, PCI_IRQ_MSIX);
 476         if (ret < 0) {
 477                 dev_err(&cpt->pdev->dev, "Request for #%d msix vectors failed\n",
 478                         CPT_PF_MSIX_VECTORS);
 479                 return ret;
 480         }
 481
 482         /* Register mailbox interrupt handlers */
 483         ret = request_irq(pci_irq_vector(cpt->pdev, CPT_PF_INT_VEC_E_MBOXX(0)),
 484                           cpt_mbx0_intr_handler, 0, "CPT Mbox0", cpt);
 485         if (ret)
 486                 goto fail;
 487
 488         /* Enable mailbox interrupt */
 489         cpt_enable_mbox_interrupts(cpt);
 490         return 0;
 491
 492 fail:
 493         dev_err(dev, "Request irq failed\n");
 494         pci_disable_msix(cpt->pdev);
 495         return ret;
 496 }
 497
 498 static void cpt_unregister_interrupts(struct cpt_device *cpt)
 499 {
 500         free_irq(pci_irq_vector(cpt->pdev, CPT_PF_INT_VEC_E_MBOXX(0)), cpt);
 501         pci_disable_msix(cpt->pdev);
 502 }
 503
 504 static int cpt_sriov_init(struct cpt_device *cpt, int num_vfs)
 505 {
 506         int pos = 0;
 507         int err;
 508         u16 total_vf_cnt;
 509         struct pci_dev *pdev = cpt->pdev;
 510
 511         pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
 512         if (!pos) {
 513                 dev_err(&pdev->dev, "SRIOV capability is not found in PCIe config space\n");
 514                 return -ENODEV;
 515         }
 516
 517         cpt->num_vf_en = num_vfs; /* User requested VFs */
 518         pci_read_config_word(pdev, (pos + PCI_SRIOV_TOTAL_VF), &total_vf_cnt);
 519         if (total_vf_cnt < cpt->num_vf_en)
 520                 cpt->num_vf_en = total_vf_cnt;
 521
 522         if (!total_vf_cnt)
 523                 return 0;
 524
 525         /*Enabled the available VFs */
 526         err = pci_enable_sriov(pdev, cpt->num_vf_en);
 527         if (err) {
 528                 dev_err(&pdev->dev, "SRIOV enable failed, num VF is %d\n",
 529                         cpt->num_vf_en);
 530                 cpt->num_vf_en = 0;
 531                 return err;
 532         }
 533
 534         /* TODO: Optionally enable static VQ priorities feature */
 535
 536         dev_info(&pdev->dev, "SRIOV enabled, number of VF available %d\n",
 537                  cpt->num_vf_en);
 538
 539         cpt->flags |= CPT_FLAG_SRIOV_ENABLED;
 540
 541         return 0;
 542 }
 543
 544 static int cpt_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 545 {
 546         struct device *dev = &pdev->dev;
 547         struct cpt_device *cpt;
 548         int err;
 549
 550         if (num_vfs > 16 || num_vfs < 4) {
 551                 dev_warn(dev, "Invalid vf count %d, Resetting it to 4(default)\n",
 552                          num_vfs);
 553                 num_vfs = 4;
 554         }
 555
 556         cpt = devm_kzalloc(dev, sizeof(*cpt), GFP_KERNEL);
 557         if (!cpt)
 558                 return -ENOMEM;
 559
 560         pci_set_drvdata(pdev, cpt);
 561         cpt->pdev = pdev;
 562         err = pci_enable_device(pdev);
 563         if (err) {
 564                 dev_err(dev, "Failed to enable PCI device\n");
 565                 pci_set_drvdata(pdev, NULL);
 566                 return err;
 567         }
 568
 569         err = pci_request_regions(pdev, DRV_NAME);
 570         if (err) {
 571                 dev_err(dev, "PCI request regions failed 0x%x\n", err);
 572                 goto cpt_err_disable_device;
 573         }
 574
 575         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(48));
 576         if (err) {
 577                 dev_err(dev, "Unable to get usable DMA configuration\n");
 578                 goto cpt_err_release_regions;
 579         }
 580
 581         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(48));
 582         if (err) {
 583                 dev_err(dev, "Unable to get 48-bit DMA for consistent allocations\n");
 584                 goto cpt_err_release_regions;
 585         }
 586
 587         /* MAP PF's configuration registers */
 588         cpt->reg_base = pcim_iomap(pdev, 0, 0);
 589         if (!cpt->reg_base) {
 590                 dev_err(dev, "Cannot map config register space, aborting\n");
 591                 err = -ENOMEM;
 592                 goto cpt_err_release_regions;
 593         }
 594
 595         /* CPT device HW initialization */
 596         cpt_device_init(cpt);
 597
 598         /* Register interrupts */
 599         err = cpt_register_interrupts(cpt);
 600         if (err)
 601                 goto cpt_err_release_regions;
 602
 603         err = cpt_ucode_load(cpt);
 604         if (err)
 605                 goto cpt_err_unregister_interrupts;
 606
 607         /* Configure SRIOV */
 608         err = cpt_sriov_init(cpt, num_vfs);
 609         if (err)
 610                 goto cpt_err_unregister_interrupts;
 611
 612         return 0;
 613
 614 cpt_err_unregister_interrupts:
 615         cpt_unregister_interrupts(cpt);
 616 cpt_err_release_regions:
 617         pci_release_regions(pdev);
 618 cpt_err_disable_device:
 619         pci_disable_device(pdev);
 620         pci_set_drvdata(pdev, NULL);
 621         return err;
 622 }
 623
 624 static void cpt_remove(struct pci_dev *pdev)
 625 {
 626         struct cpt_device *cpt = pci_get_drvdata(pdev);
 627
 628         /* Disengage SE and AE cores from all groups*/
 629         cpt_disable_all_cores(cpt);
 630         /* Unload microcodes */
 631         cpt_unload_microcode(cpt);
 632         cpt_unregister_interrupts(cpt);
 633         pci_disable_sriov(pdev);
 634         pci_release_regions(pdev);
 635         pci_disable_device(pdev);
 636         pci_set_drvdata(pdev, NULL);
 637 }
 638
 639 static void cpt_shutdown(struct pci_dev *pdev)
 640 {
 641         struct cpt_device *cpt = pci_get_drvdata(pdev);
 642
 643         if (!cpt)
 644                 return;
 645
 646         dev_info(&pdev->dev, "Shutdown device %x:%x.\n",
 647                  (u32)pdev->vendor, (u32)pdev->device);
 648
 649         cpt_unregister_interrupts(cpt);
 650         pci_release_regions(pdev);
 651         pci_disable_device(pdev);
 652         pci_set_drvdata(pdev, NULL);
 653 }
 654
 655 /* Supported devices */
 656 static const struct pci_device_id cpt_id_table[] = {
 657         { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, CPT_81XX_PCI_PF_DEVICE_ID) },
 658         { 0, }  /* end of table */
 659 };
 660
 661 static struct pci_driver cpt_pci_driver = {
 662         .name = DRV_NAME,
 663         .id_table = cpt_id_table,
 664         .probe = cpt_probe,
 665         .remove = cpt_remove,
 666         .shutdown = cpt_shutdown,
 667 };
 668
 669 module_pci_driver(cpt_pci_driver);
 670
 671 MODULE_AUTHOR("George Cherian <george.cherian@cavium.com>");
 672 MODULE_DESCRIPTION("Cavium Thunder CPT Physical Function Driver");
 673 MODULE_LICENSE("GPL v2");
 674 MODULE_VERSION(DRV_VERSION);
 675 MODULE_DEVICE_TABLE(pci, cpt_id_table);