tpm-interface.c (9938b04472d5c59f8bd8152a548533a8599596a2) tpm-interface.c (8cfffc9d4d3786d3b496a021d7224e06328bac7d)
1/*
2 * Copyright (C) 2004 IBM Corporation
3 * Copyright (C) 2014 Intel Corporation
4 *
5 * Authors:
6 * Leendert van Doorn <leendert@watson.ibm.com>
7 * Dave Safford <safford@watson.ibm.com>
8 * Reiner Sailer <sailer@watson.ibm.com>

--- 331 unchanged lines hidden (view full) ---

340 if (bufsiz > TPM_BUFSIZE)
341 bufsiz = TPM_BUFSIZE;
342
343 count = be32_to_cpu(*((__be32 *) (buf + 2)));
344 ordinal = be32_to_cpu(*((__be32 *) (buf + 6)));
345 if (count == 0)
346 return -ENODATA;
347 if (count > bufsiz) {
1/*
2 * Copyright (C) 2004 IBM Corporation
3 * Copyright (C) 2014 Intel Corporation
4 *
5 * Authors:
6 * Leendert van Doorn <leendert@watson.ibm.com>
7 * Dave Safford <safford@watson.ibm.com>
8 * Reiner Sailer <sailer@watson.ibm.com>

--- 331 unchanged lines hidden (view full) ---

340 if (bufsiz > TPM_BUFSIZE)
341 bufsiz = TPM_BUFSIZE;
342
343 count = be32_to_cpu(*((__be32 *) (buf + 2)));
344 ordinal = be32_to_cpu(*((__be32 *) (buf + 6)));
345 if (count == 0)
346 return -ENODATA;
347 if (count > bufsiz) {
348 dev_err(chip->pdev,
348 dev_err(&chip->dev,
349 "invalid count value %x %zx\n", count, bufsiz);
350 return -E2BIG;
351 }
352
353 mutex_lock(&chip->tpm_mutex);
354
355 rc = chip->ops->send(chip, (u8 *) buf, count);
356 if (rc < 0) {
349 "invalid count value %x %zx\n", count, bufsiz);
350 return -E2BIG;
351 }
352
353 mutex_lock(&chip->tpm_mutex);
354
355 rc = chip->ops->send(chip, (u8 *) buf, count);
356 if (rc < 0) {
357 dev_err(chip->pdev,
357 dev_err(&chip->dev,
358 "tpm_transmit: tpm_send: error %zd\n", rc);
359 goto out;
360 }
361
362 if (chip->vendor.irq)
363 goto out_recv;
364
365 if (chip->flags & TPM_CHIP_FLAG_TPM2)
366 stop = jiffies + tpm2_calc_ordinal_duration(chip, ordinal);
367 else
368 stop = jiffies + tpm_calc_ordinal_duration(chip, ordinal);
369 do {
370 u8 status = chip->ops->status(chip);
371 if ((status & chip->ops->req_complete_mask) ==
372 chip->ops->req_complete_val)
373 goto out_recv;
374
375 if (chip->ops->req_canceled(chip, status)) {
358 "tpm_transmit: tpm_send: error %zd\n", rc);
359 goto out;
360 }
361
362 if (chip->vendor.irq)
363 goto out_recv;
364
365 if (chip->flags & TPM_CHIP_FLAG_TPM2)
366 stop = jiffies + tpm2_calc_ordinal_duration(chip, ordinal);
367 else
368 stop = jiffies + tpm_calc_ordinal_duration(chip, ordinal);
369 do {
370 u8 status = chip->ops->status(chip);
371 if ((status & chip->ops->req_complete_mask) ==
372 chip->ops->req_complete_val)
373 goto out_recv;
374
375 if (chip->ops->req_canceled(chip, status)) {
376 dev_err(chip->pdev, "Operation Canceled\n");
376 dev_err(&chip->dev, "Operation Canceled\n");
377 rc = -ECANCELED;
378 goto out;
379 }
380
381 msleep(TPM_TIMEOUT); /* CHECK */
382 rmb();
383 } while (time_before(jiffies, stop));
384
385 chip->ops->cancel(chip);
377 rc = -ECANCELED;
378 goto out;
379 }
380
381 msleep(TPM_TIMEOUT); /* CHECK */
382 rmb();
383 } while (time_before(jiffies, stop));
384
385 chip->ops->cancel(chip);
386 dev_err(chip->pdev, "Operation Timed out\n");
386 dev_err(&chip->dev, "Operation Timed out\n");
387 rc = -ETIME;
388 goto out;
389
390out_recv:
391 rc = chip->ops->recv(chip, (u8 *) buf, bufsiz);
392 if (rc < 0)
387 rc = -ETIME;
388 goto out;
389
390out_recv:
391 rc = chip->ops->recv(chip, (u8 *) buf, bufsiz);
392 if (rc < 0)
393 dev_err(chip->pdev,
393 dev_err(&chip->dev,
394 "tpm_transmit: tpm_recv: error %zd\n", rc);
395out:
396 mutex_unlock(&chip->tpm_mutex);
397 return rc;
398}
399
400#define TPM_DIGEST_SIZE 20
401#define TPM_RET_CODE_IDX 6

--- 9 unchanged lines hidden (view full) ---

411 return len;
412 else if (len < TPM_HEADER_SIZE)
413 return -EFAULT;
414
415 header = cmd;
416
417 err = be32_to_cpu(header->return_code);
418 if (err != 0 && desc)
394 "tpm_transmit: tpm_recv: error %zd\n", rc);
395out:
396 mutex_unlock(&chip->tpm_mutex);
397 return rc;
398}
399
400#define TPM_DIGEST_SIZE 20
401#define TPM_RET_CODE_IDX 6

--- 9 unchanged lines hidden (view full) ---

411 return len;
412 else if (len < TPM_HEADER_SIZE)
413 return -EFAULT;
414
415 header = cmd;
416
417 err = be32_to_cpu(header->return_code);
418 if (err != 0 && desc)
419 dev_err(chip->pdev, "A TPM error (%d) occurred %s\n", err,
419 dev_err(&chip->dev, "A TPM error (%d) occurred %s\n", err,
420 desc);
421
422 return err;
423}
424
425#define TPM_INTERNAL_RESULT_SIZE 200
426#define TPM_ORD_GET_CAP cpu_to_be32(101)
427#define TPM_ORD_GET_RANDOM cpu_to_be32(70)

--- 94 unchanged lines hidden (view full) ---

522 tpm_cmd.params.getcap_in.cap = TPM_CAP_PROP;
523 tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
524 tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_TIMEOUT;
525 rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, NULL);
526
527 if (rc == TPM_ERR_INVALID_POSTINIT) {
528 /* The TPM is not started, we are the first to talk to it.
529 Execute a startup command. */
420 desc);
421
422 return err;
423}
424
425#define TPM_INTERNAL_RESULT_SIZE 200
426#define TPM_ORD_GET_CAP cpu_to_be32(101)
427#define TPM_ORD_GET_RANDOM cpu_to_be32(70)

--- 94 unchanged lines hidden (view full) ---

522 tpm_cmd.params.getcap_in.cap = TPM_CAP_PROP;
523 tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
524 tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_TIMEOUT;
525 rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, NULL);
526
527 if (rc == TPM_ERR_INVALID_POSTINIT) {
528 /* The TPM is not started, we are the first to talk to it.
529 Execute a startup command. */
530 dev_info(chip->pdev, "Issuing TPM_STARTUP");
530 dev_info(&chip->dev, "Issuing TPM_STARTUP");
531 if (tpm_startup(chip, TPM_ST_CLEAR))
532 return rc;
533
534 tpm_cmd.header.in = tpm_getcap_header;
535 tpm_cmd.params.getcap_in.cap = TPM_CAP_PROP;
536 tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
537 tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_TIMEOUT;
538 rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
539 NULL);
540 }
541 if (rc) {
531 if (tpm_startup(chip, TPM_ST_CLEAR))
532 return rc;
533
534 tpm_cmd.header.in = tpm_getcap_header;
535 tpm_cmd.params.getcap_in.cap = TPM_CAP_PROP;
536 tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
537 tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_TIMEOUT;
538 rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
539 NULL);
540 }
541 if (rc) {
542 dev_err(chip->pdev,
542 dev_err(&chip->dev,
543 "A TPM error (%zd) occurred attempting to determine the timeouts\n",
544 rc);
545 goto duration;
546 }
547
548 if (be32_to_cpu(tpm_cmd.header.out.return_code) != 0 ||
549 be32_to_cpu(tpm_cmd.header.out.length)
550 != sizeof(tpm_cmd.header.out) + sizeof(u32) + 4 * sizeof(u32))

--- 22 unchanged lines hidden (view full) ---

573 for (i = 0; i != ARRAY_SIZE(new_timeout); i++)
574 new_timeout[i] *= 1000;
575 chip->vendor.timeout_adjusted = true;
576 }
577 }
578
579 /* Report adjusted timeouts */
580 if (chip->vendor.timeout_adjusted) {
543 "A TPM error (%zd) occurred attempting to determine the timeouts\n",
544 rc);
545 goto duration;
546 }
547
548 if (be32_to_cpu(tpm_cmd.header.out.return_code) != 0 ||
549 be32_to_cpu(tpm_cmd.header.out.length)
550 != sizeof(tpm_cmd.header.out) + sizeof(u32) + 4 * sizeof(u32))

--- 22 unchanged lines hidden (view full) ---

573 for (i = 0; i != ARRAY_SIZE(new_timeout); i++)
574 new_timeout[i] *= 1000;
575 chip->vendor.timeout_adjusted = true;
576 }
577 }
578
579 /* Report adjusted timeouts */
580 if (chip->vendor.timeout_adjusted) {
581 dev_info(chip->pdev,
581 dev_info(&chip->dev,
582 HW_ERR "Adjusting reported timeouts: A %lu->%luus B %lu->%luus C %lu->%luus D %lu->%luus\n",
583 old_timeout[0], new_timeout[0],
584 old_timeout[1], new_timeout[1],
585 old_timeout[2], new_timeout[2],
586 old_timeout[3], new_timeout[3]);
587 }
588
589 chip->vendor.timeout_a = usecs_to_jiffies(new_timeout[0]);

--- 30 unchanged lines hidden (view full) ---

620 * fix up the resulting too-small TPM_SHORT value to make things work.
621 * We also scale the TPM_MEDIUM and -_LONG values by 1000.
622 */
623 if (chip->vendor.duration[TPM_SHORT] < (HZ / 100)) {
624 chip->vendor.duration[TPM_SHORT] = HZ;
625 chip->vendor.duration[TPM_MEDIUM] *= 1000;
626 chip->vendor.duration[TPM_LONG] *= 1000;
627 chip->vendor.duration_adjusted = true;
582 HW_ERR "Adjusting reported timeouts: A %lu->%luus B %lu->%luus C %lu->%luus D %lu->%luus\n",
583 old_timeout[0], new_timeout[0],
584 old_timeout[1], new_timeout[1],
585 old_timeout[2], new_timeout[2],
586 old_timeout[3], new_timeout[3]);
587 }
588
589 chip->vendor.timeout_a = usecs_to_jiffies(new_timeout[0]);

--- 30 unchanged lines hidden (view full) ---

620 * fix up the resulting too-small TPM_SHORT value to make things work.
621 * We also scale the TPM_MEDIUM and -_LONG values by 1000.
622 */
623 if (chip->vendor.duration[TPM_SHORT] < (HZ / 100)) {
624 chip->vendor.duration[TPM_SHORT] = HZ;
625 chip->vendor.duration[TPM_MEDIUM] *= 1000;
626 chip->vendor.duration[TPM_LONG] *= 1000;
627 chip->vendor.duration_adjusted = true;
628 dev_info(chip->pdev, "Adjusting TPM timeout parameters.");
628 dev_info(&chip->dev, "Adjusting TPM timeout parameters.");
629 }
630 return 0;
631}
632EXPORT_SYMBOL_GPL(tpm_get_timeouts);
633
634#define TPM_ORD_CONTINUE_SELFTEST 83
635#define CONTINUE_SELFTEST_RESULT_SIZE 10
636

--- 173 unchanged lines hidden (view full) ---

810 /* Attempt to read a PCR value */
811 cmd.header.in = pcrread_header;
812 cmd.params.pcrread_in.pcr_idx = cpu_to_be32(0);
813 rc = tpm_transmit(chip, (u8 *) &cmd, READ_PCR_RESULT_SIZE);
814 /* Some buggy TPMs will not respond to tpm_tis_ready() for
815 * around 300ms while the self test is ongoing, keep trying
816 * until the self test duration expires. */
817 if (rc == -ETIME) {
629 }
630 return 0;
631}
632EXPORT_SYMBOL_GPL(tpm_get_timeouts);
633
634#define TPM_ORD_CONTINUE_SELFTEST 83
635#define CONTINUE_SELFTEST_RESULT_SIZE 10
636

--- 173 unchanged lines hidden (view full) ---

810 /* Attempt to read a PCR value */
811 cmd.header.in = pcrread_header;
812 cmd.params.pcrread_in.pcr_idx = cpu_to_be32(0);
813 rc = tpm_transmit(chip, (u8 *) &cmd, READ_PCR_RESULT_SIZE);
814 /* Some buggy TPMs will not respond to tpm_tis_ready() for
815 * around 300ms while the self test is ongoing, keep trying
816 * until the self test duration expires. */
817 if (rc == -ETIME) {
818 dev_info(chip->pdev, HW_ERR "TPM command timed out during continue self test");
818 dev_info(
819 &chip->dev, HW_ERR
820 "TPM command timed out during continue self test");
819 msleep(delay_msec);
820 continue;
821 }
822
823 if (rc < TPM_HEADER_SIZE)
824 return -EFAULT;
825
826 rc = be32_to_cpu(cmd.header.out.return_code);
827 if (rc == TPM_ERR_DISABLED || rc == TPM_ERR_DEACTIVATED) {
821 msleep(delay_msec);
822 continue;
823 }
824
825 if (rc < TPM_HEADER_SIZE)
826 return -EFAULT;
827
828 rc = be32_to_cpu(cmd.header.out.return_code);
829 if (rc == TPM_ERR_DISABLED || rc == TPM_ERR_DEACTIVATED) {
828 dev_info(chip->pdev,
830 dev_info(&chip->dev,
829 "TPM is disabled/deactivated (0x%X)\n", rc);
830 /* TPM is disabled and/or deactivated; driver can
831 * proceed and TPM does handle commands for
832 * suspend/resume correctly
833 */
834 return 0;
835 }
836 if (rc != TPM_WARN_DOING_SELFTEST)

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973 * may cause the TPM to invalidate previously saved state.
974 */
975 if (rc != TPM_WARN_RETRY)
976 break;
977 msleep(TPM_TIMEOUT_RETRY);
978 }
979
980 if (rc)
831 "TPM is disabled/deactivated (0x%X)\n", rc);
832 /* TPM is disabled and/or deactivated; driver can
833 * proceed and TPM does handle commands for
834 * suspend/resume correctly
835 */
836 return 0;
837 }
838 if (rc != TPM_WARN_DOING_SELFTEST)

--- 136 unchanged lines hidden (view full) ---

975 * may cause the TPM to invalidate previously saved state.
976 */
977 if (rc != TPM_WARN_RETRY)
978 break;
979 msleep(TPM_TIMEOUT_RETRY);
980 }
981
982 if (rc)
981 dev_err(chip->pdev,
983 dev_err(&chip->dev,
982 "Error (%d) sending savestate before suspend\n", rc);
983 else if (try > 0)
984 "Error (%d) sending savestate before suspend\n", rc);
985 else if (try > 0)
984 dev_warn(chip->pdev, "TPM savestate took %dms\n",
986 dev_warn(&chip->dev, "TPM savestate took %dms\n",
985 try * TPM_TIMEOUT_RETRY);
986
987 return rc;
988}
989EXPORT_SYMBOL_GPL(tpm_pm_suspend);
990
991/*
992 * Resume from a power safe. The BIOS already restored

--- 157 unchanged lines hidden --- 		987 try * TPM_TIMEOUT_RETRY);
988
989 return rc;
990}
991EXPORT_SYMBOL_GPL(tpm_pm_suspend);
992
993/*
994 * Resume from a power safe. The BIOS already restored

--- 157 unchanged lines hidden ---