From patchwork Wed Nov 25 21:05:34 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Gunthorpe X-Patchwork-Id: 548770 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.34.181.88]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 1E4061402EC for ; Thu, 26 Nov 2015 08:06:09 +1100 (AEDT) Received: from localhost ([127.0.0.1] helo=sfs-ml-1.v29.ch3.sourceforge.com) by sfs-ml-1.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1a1hGM-0003P0-A9; Wed, 25 Nov 2015 21:06:02 +0000 Received: from sog-mx-1.v43.ch3.sourceforge.com ([172.29.43.191] helo=mx.sourceforge.net) by sfs-ml-1.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1a1hGK-0003Og-11 for tpmdd-devel@lists.sourceforge.net; Wed, 25 Nov 2015 21:06:00 +0000 Received-SPF: pass (sog-mx-1.v43.ch3.sourceforge.com: domain of obsidianresearch.com designates 184.70.90.242 as permitted sender) client-ip=184.70.90.242; envelope-from=jgunthorpe@obsidianresearch.com; helo=quartz.orcorp.ca; Received: from quartz.orcorp.ca ([184.70.90.242]) by sog-mx-1.v43.ch3.sourceforge.com with esmtps (TLSv1:AES128-SHA:128) (Exim 4.76) id 1a1hGI-0002mr-Se for tpmdd-devel@lists.sourceforge.net; Wed, 25 Nov 2015 21:05:59 +0000 Received: from [10.0.0.160] (helo=jggl.edm.orcorp.ca) by quartz.orcorp.ca with esmtps (TLS1.2:ECDHE_RSA_AES_128_CBC_SHA256:128) (Exim 4.84) (envelope-from ) id 1a1hG5-0004NW-Lo; Wed, 25 Nov 2015 14:05:45 -0700 From: Jason Gunthorpe To: Jarkko Sakkinen , tpmdd-devel@lists.sourceforge.net Date: Wed, 25 Nov 2015 14:05:34 -0700 Message-Id: <1448485536-7282-6-git-send-email-jgunthorpe@obsidianresearch.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1448485536-7282-1-git-send-email-jgunthorpe@obsidianresearch.com> References: <1448485536-7282-1-git-send-email-jgunthorpe@obsidianresearch.com> X-Broken-Reverse-DNS: no host name found for IP address 10.0.0.160 X-Spam-Score: -1.4 (-) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. -1.5 SPF_CHECK_PASS SPF reports sender host as permitted sender for sender-domain -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.2 AWL AWL: Adjusted score from AWL reputation of From: address X-Headers-End: 1a1hGI-0002mr-Se Cc: Martin Wilck , Scot Doyle Subject: [tpmdd-devel] [PATCH 5/7] tpm_tis: Get rid of the duplicate IRQ probing code X-BeenThere: tpmdd-devel@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: Tpm Device Driver maintainance List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: tpmdd-devel-bounces@lists.sourceforge.net The new code that works directly in tpm_tis_send is able to handle IRQ probing duties as well, so just use it for everything. Signed-off-by: Jason Gunthorpe --- drivers/char/tpm/tpm.h | 1 - drivers/char/tpm/tpm_tis.c | 67 ++++++++++++++-------------------------------- 2 files changed, 20 insertions(+), 48 deletions(-) diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index cdd49cd51dc1..542a80cbfd9c 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -142,7 +142,6 @@ struct tpm_vendor_specific { unsigned long base; /* TPM base address */ int irq; - int probed_irq; int region_size; int have_region; diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c index 65a252c7ec5f..2580893de023 100644 --- a/drivers/char/tpm/tpm_tis.c +++ b/drivers/char/tpm/tpm_tis.c @@ -99,6 +99,7 @@ static struct tpm_info tis_default_info = { #define TPM_RID(l) (0x0F04 | ((l) << 12)) struct priv_data { + bool irq_probing; bool irq_tested; }; @@ -463,8 +464,9 @@ static int tpm_tis_send(struct tpm_chip *chip, u8 *buf, size_t len) msleep(1); if (!priv->irq_tested) { disable_interrupts(chip); - dev_err(chip->pdev, - FW_BUG "TPM interrupt not working, polling instead\n"); + if (!priv->irq_probing) + dev_err(chip->pdev, FW_BUG + "TPM interrupt not working, polling instead\n"); } priv->irq_tested = true; return rc; @@ -570,26 +572,6 @@ static const struct tpm_class_ops tpm_tis = { .req_canceled = tpm_tis_req_canceled, }; -static irqreturn_t tis_int_probe(int irq, void *dev_id) -{ - struct tpm_chip *chip = dev_id; - u32 interrupt; - - interrupt = ioread32(chip->vendor.iobase + - TPM_INT_STATUS(chip->vendor.locality)); - - if (interrupt == 0) - return IRQ_NONE; - - chip->vendor.probed_irq = irq; - - /* Clear interrupts handled with TPM_EOI */ - iowrite32(interrupt, - chip->vendor.iobase + - TPM_INT_STATUS(chip->vendor.locality)); - return IRQ_HANDLED; -} - static irqreturn_t tis_int_handler(int dummy, void *dev_id) { struct tpm_chip *chip = dev_id; @@ -772,13 +754,14 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info, iowrite8(i, chip->vendor.iobase + TPM_INT_VECTOR(chip->vendor.locality)); if (devm_request_irq - (dev, i, tis_int_probe, IRQF_SHARED, + (dev, i, tis_int_handler, IRQF_SHARED, chip->devname, chip) != 0) { dev_info(chip->pdev, "Unable to request irq: %d for probe\n", i); continue; } + chip->vendor.irq = i; /* Clear all existing */ iowrite32(ioread32 @@ -792,7 +775,8 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info, chip->vendor.iobase + TPM_INT_ENABLE(chip->vendor.locality)); - chip->vendor.probed_irq = 0; + priv->irq_tested = false; + priv->irq_probing = true; /* Generate Interrupts */ if (chip->flags & TPM_CHIP_FLAG_TPM2) @@ -800,29 +784,20 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info, else tpm_gen_interrupt(chip); - if (!chip->vendor.probed_irq) - msleep(1); - - chip->vendor.irq = chip->vendor.probed_irq; - - /* free_irq will call into tis_int_probe; - clear all irqs we haven't seen while doing - tpm_gen_interrupt */ - iowrite32(ioread32 - (chip->vendor.iobase + - TPM_INT_STATUS(chip->vendor.locality)), - chip->vendor.iobase + - TPM_INT_STATUS(chip->vendor.locality)); - - /* Turn off */ - iowrite32(intmask, - chip->vendor.iobase + - TPM_INT_ENABLE(chip->vendor.locality)); + priv->irq_probing = false; - devm_free_irq(dev, i, chip); + /* tpm_tis_send will either confirm the interrupt is + * working or it will call disable_irq which undoes + * all of the above. + */ + if (chip->vendor.irq) + break; } + if (!chip->vendor.irq) + iowrite8(irq_r, chip->vendor.iobase + + TPM_INT_VECTOR(chip->vendor.locality)); } - if (chip->vendor.irq) { + if (chip->vendor.irq && !priv->irq_tested) { iowrite8(chip->vendor.irq, chip->vendor.iobase + TPM_INT_VECTOR(chip->vendor.locality)); @@ -846,9 +821,7 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info, chip->vendor.iobase + TPM_INT_ENABLE(chip->vendor.locality)); } - } else if (irq_r != -1) - iowrite8(irq_r, chip->vendor.iobase + - TPM_INT_VECTOR(chip->vendor.locality)); + } if (tpm_get_timeouts(chip)) { dev_err(dev, "Could not get TPM timeouts and durations\n");