Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262074AbVD0W1A (ORCPT ); Wed, 27 Apr 2005 18:27:00 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262054AbVD0WYL (ORCPT ); Wed, 27 Apr 2005 18:24:11 -0400 Received: from e1.ny.us.ibm.com ([32.97.182.141]:57820 "EHLO e1.ny.us.ibm.com") by vger.kernel.org with ESMTP id S262066AbVD0WT3 (ORCPT ); Wed, 27 Apr 2005 18:19:29 -0400 Date: Wed, 27 Apr 2005 17:19:17 -0500 (CDT) From: Kylene Hall X-X-Sender: kjhall@jo.austin.ibm.com To: linux-kernel@vger.kernel.org Subject: [PATCH 11 of 12] Fix Tpm driver -- add cancel function Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3890 Lines: 108 Userspcace needs to be able to cancel functions which have been sent to the TPM (part of the spec.). Add a sysfs file that communicates this desire to the driver and device. Signed-off-by: Kylene Hall --- --- linux-2.6.12-rc2/drivers/char/tpm/tpm.h 2005-04-21 18:11:12.000000000 -0500 +++ linux-2.6.12-rc2-tpmdd/drivers/char/tpm/tpm.h 2005-04-21 18:28:09.000000000 -0500 @@ -52,6 +52,7 @@ struct tpm_chip; struct tpm_vendor_specific { u8 req_complete_mask; u8 req_complete_val; + u8 req_canceled; u16 base; /* TPM base address */ int (*recv) (struct tpm_chip *, u8 *, size_t); diff -urpN --exclude='*.orig' linux-2.6.12-rc2/drivers/char/tpm/tpm_atmel.c linux-2.6.12-rc2-tpmdd/drivers/char/tpm/tpm_atmel.c --- linux-2.6.12-rc2/drivers/char/tpm/tpm_atmel.c 2005-04-25 18:49:08.000000000 -0500 +++ linux-2.6.12-rc2-tpmdd/drivers/char/tpm/tpm_atmel.c 2005-04-26 15:31:57.000000000 -0500 @@ -132,6 +132,7 @@ static struct tpm_vendor_specific tpm_at .cancel = tpm_atml_cancel, .req_complete_mask = ATML_STATUS_BUSY | ATML_STATUS_DATA_AVAIL, .req_complete_val = ATML_STATUS_DATA_AVAIL, + .req_canceled = ATML_STATUS_READY, .base = TPM_ATML_BASE, .attr = TPM_DEVICE_ATTRS, .miscdev.fops = &atmel_ops, diff -urpN --exclude='*.orig' linux-2.6.12-rc2/drivers/char/tpm/tpm_nsc.c linux-2.6.12-rc2-tpmdd/drivers/char/tpm/tpm_nsc.c --- linux-2.6.12-rc2/drivers/char/tpm/tpm_nsc.c 2005-04-25 18:49:08.000000000 -0500 +++ linux-2.6.12-rc2-tpmdd/drivers/char/tpm/tpm_nsc.c 2005-04-26 15:32:26.000000000 -0500 @@ -230,6 +230,7 @@ static struct tpm_vendor_specific tpm_ns .cancel = tpm_nsc_cancel, .req_complete_mask = NSC_STATUS_OBF, .req_complete_val = NSC_STATUS_OBF, + .req_canceled = NSC_STATUS_RDY, .base = TPM_NSC_BASE, .attr = TPM_DEVICE_ATTRS, .miscdev.fops = &nsc_ops, --- linux-2.6.12-rc2/drivers/char/tpm/tpm.c 2005-04-27 11:13:29.000000000 -0500 +++ linux-2.6.12-rc2-tpmdd/drivers/chat/tpm/tpm.c 2005-04-27 11:32:35.000000000 -0500 @@ -140,7 +140,7 @@ EXPORT_SYMBOL_GPL(tpm_lpc_bus_init); static ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf, size_t bufsiz) { - ssize_t len; + ssize_t rc; u32 count; __be32 *native_size; unsigned long stop; @@ -158,10 +158,10 @@ static ssize_t tpm_transmit(struct tpm_c down(&chip->tpm_mutex); - if ((len = chip->vendor->send(chip, (u8 *) buf, count)) < 0) { + if ((rc = chip->vendor->send(chip, (u8 *) buf, count)) < 0) { dev_err(&chip->pci_dev->dev, - "tpm_transmit: tpm_send: error %d\n", len); - return len; + "tpm_transmit: tpm_send: error %Zd\n", rc); + goto out; } stop = jiffies + 2 * 60 * HZ; @@ -171,23 +171,31 @@ static ssize_t tpm_transmit(struct tpm_c chip->vendor->req_complete_val) { goto out_recv; } - msleep(TPM_TIMEOUT); /* CHECK */ + + if ((status == chip->vendor->req_canceled)) { + dev_err(&chip->pci_dev->dev, "Operation Canceled\n"); + rc = -ECANCELED; + goto out; + } + + msleep(TPM_TIMEOUT); /* CHECK */ rmb(); } while (time_before(jiffies, stop)); chip->vendor->cancel(chip); - dev_err(&chip->pci_dev->dev, "Time expired\n"); - up(&chip->tpm_mutex); - return -EIO; + dev_err(&chip->pci_dev->dev, "Operation Timed out\n"); + rc = -ETIME; + goto out; out_recv: - len = chip->vendor->recv(chip, (u8 *) buf, bufsiz); - if (len < 0) + rc = chip->vendor->recv(chip, (u8 *) buf, bufsiz); + if (rc < 0) dev_err(&chip->pci_dev->dev, - "tpm_transmit: tpm_recv: error %d\n", len); + "tpm_transmit: tpm_recv: error %Zd\n", rc); +out: up(&chip->tpm_mutex); - return len; + return rc; } #define TPM_DIGEST_SIZE 20 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/