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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/drivers/char/tpm/tpm_ibmvtpm.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Copyright (C) 2012-2020 IBM Corporation
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  *
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@@ -7,12 +8,6 @@
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  *
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  * Device driver for TCG/TCPA TPM (trusted platform module).
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  * Specifications at www.trustedcomputinggroup.org
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License as
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- * published by the Free Software Foundation, version 2 of the
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- * License.
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- *
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  */
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12
 
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 #include <linux/dma-mapping.h>
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@@ -34,13 +29,13 @@
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29
 
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 static const struct vio_device_id tpm_ibmvtpm_device_table[] = {
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 	{ "IBM,vtpm", "IBM,vtpm"},
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+	{ "IBM,vtpm", "IBM,vtpm20"},
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 	{ "", "" }
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 };
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 MODULE_DEVICE_TABLE(vio, tpm_ibmvtpm_device_table);
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36
 
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 /**
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- *
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- * ibmvtpm_send_crq_word - Send a CRQ request
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+ * ibmvtpm_send_crq_word() - Send a CRQ request
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  * @vdev:	vio device struct
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  * @w1:		pre-constructed first word of tpm crq (second word is reserved)
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  *
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@@ -54,8 +49,7 @@
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 }
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50
 
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 /**
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- *
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- * ibmvtpm_send_crq - Send a CRQ request
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+ * ibmvtpm_send_crq() - Send a CRQ request
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  *
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  * @vdev:	vio device struct
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  * @valid:	Valid field
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@@ -112,16 +106,11 @@
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 {
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 	struct ibmvtpm_dev *ibmvtpm = dev_get_drvdata(&chip->dev);
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 	u16 len;
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-	int sig;
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109
 
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 	if (!ibmvtpm->rtce_buf) {
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 		dev_err(ibmvtpm->dev, "ibmvtpm device is not ready\n");
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 		return 0;
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 	}
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-
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-	sig = wait_event_interruptible(ibmvtpm->wq, !ibmvtpm->tpm_processing_cmd);
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-	if (sig)
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-		return -EINTR;
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114
 
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 	len = ibmvtpm->res_len;
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116
 
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@@ -243,7 +232,7 @@
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 	 * set the processing flag before the Hcall, since we may get the
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 	 * result (interrupt) before even being able to check rc.
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 	 */
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-	ibmvtpm->tpm_processing_cmd = true;
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+	ibmvtpm->tpm_processing_cmd = 1;
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236
 
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 again:
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 	rc = ibmvtpm_send_crq(ibmvtpm->vdev,
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@@ -261,7 +250,7 @@
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 			goto again;
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 		}
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 		dev_err(ibmvtpm->dev, "tpm_ibmvtpm_send failed rc=%d\n", rc);
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-		ibmvtpm->tpm_processing_cmd = false;
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+		ibmvtpm->tpm_processing_cmd = 0;
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 	}
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255
 
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 	spin_unlock(&ibmvtpm->rtce_lock);
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@@ -275,7 +264,9 @@
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264
 
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 static u8 tpm_ibmvtpm_status(struct tpm_chip *chip)
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 {
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-	return 0;
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+	struct ibmvtpm_dev *ibmvtpm = dev_get_drvdata(&chip->dev);
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+
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+	return ibmvtpm->tpm_processing_cmd;
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 }
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271
 
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 /**
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@@ -465,7 +456,7 @@
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 	.send = tpm_ibmvtpm_send,
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 	.cancel = tpm_ibmvtpm_cancel,
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 	.status = tpm_ibmvtpm_status,
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-	.req_complete_mask = 0,
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+	.req_complete_mask = 1,
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 	.req_complete_val = 0,
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 	.req_canceled = tpm_ibmvtpm_req_canceled,
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 };
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@@ -558,7 +549,7 @@
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 		case VTPM_TPM_COMMAND_RES:
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 			/* len of the data in rtce buffer */
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 			ibmvtpm->res_len = be16_to_cpu(crq->len);
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-			ibmvtpm->tpm_processing_cmd = false;
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+			ibmvtpm->tpm_processing_cmd = 0;
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 			wake_up_interruptible(&ibmvtpm->wq);
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 			return;
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 		default:
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@@ -692,10 +683,25 @@
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 	if (!wait_event_timeout(ibmvtpm->crq_queue.wq,
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 				ibmvtpm->rtce_buf != NULL,
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 				HZ)) {
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+		rc = -ENODEV;
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 		dev_err(dev, "CRQ response timed out\n");
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 		goto init_irq_cleanup;
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 	}
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690
 
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+
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+	if (!strcmp(id->compat, "IBM,vtpm20"))
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+		chip->flags |= TPM_CHIP_FLAG_TPM2;
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+
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+	rc = tpm_get_timeouts(chip);
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+	if (rc)
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+		goto init_irq_cleanup;
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+
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+	if (chip->flags & TPM_CHIP_FLAG_TPM2) {
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+		rc = tpm2_get_cc_attrs_tbl(chip);
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+		if (rc)
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+			goto init_irq_cleanup;
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+	}
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+
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 	return tpm_chip_register(chip);
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 init_irq_cleanup:
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 	do {