Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754182AbcDUSQv (ORCPT ); Thu, 21 Apr 2016 14:16:51 -0400 Received: from mga09.intel.com ([134.134.136.24]:37792 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754086AbcDUSP7 (ORCPT ); Thu, 21 Apr 2016 14:15:59 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.24,513,1455004800"; d="scan'208";a="960003219" From: Andy Shevchenko To: Tejun Heo , linux-ide@vger.kernel.org, Rob Herring , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Christian Lamparter , =?UTF-8?q?M=C3=A5ns=20Rullg=C3=A5rd?= , Julian Margetson Subject: [PATCH v1 11/23] ata: sata_dwc_460ex: get rid of global data Date: Thu, 21 Apr 2016 21:15:32 +0300 Message-Id: <1461262544-115408-12-git-send-email-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.8.0.rc3 In-Reply-To: <1461262544-115408-1-git-send-email-andriy.shevchenko@linux.intel.com> References: <1461262544-115408-1-git-send-email-andriy.shevchenko@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7977 Lines: 229 From: Mans Rullgard This moves all global data into the driver private struct, thus permitting multiple devices of this type to be used. The core_scr_read/write() functions are replaced with equivalent calls to the existing sata_dwc_scr_read/write(). Signed-off-by: Mans Rullgard --- drivers/ata/sata_dwc_460ex.c | 79 ++++++++++++++++---------------------------- 1 file changed, 29 insertions(+), 50 deletions(-) diff --git a/drivers/ata/sata_dwc_460ex.c b/drivers/ata/sata_dwc_460ex.c index 4d23fbd..8e7c1b0 100644 --- a/drivers/ata/sata_dwc_460ex.c +++ b/drivers/ata/sata_dwc_460ex.c @@ -146,6 +146,8 @@ struct sata_dwc_device { struct ata_host *host; u8 __iomem *reg_base; struct sata_dwc_regs *sata_dwc_regs; /* DW Synopsys SATA specific */ + u32 sactive_issued; + u32 sactive_queued; struct phy *phy; #ifdef CONFIG_SATA_DWC_OLD_DMA struct dw_dma_chip *dma; @@ -190,14 +192,6 @@ enum { SATA_DWC_DMA_PENDING_RX = 2, }; -struct sata_dwc_host_priv { - void __iomem *scr_addr_sstatus; - u32 sata_dwc_sactive_issued ; - u32 sata_dwc_sactive_queued ; -}; - -static struct sata_dwc_host_priv host_pvt; - /* * Prototypes */ @@ -457,21 +451,11 @@ static int sata_dwc_scr_write(struct ata_link *link, unsigned int scr, u32 val) return 0; } -static u32 core_scr_read(unsigned int scr) -{ - return in_le32(host_pvt.scr_addr_sstatus + (scr * 4)); -} - -static void core_scr_write(unsigned int scr, u32 val) -{ - out_le32(host_pvt.scr_addr_sstatus + (scr * 4), val); -} - -static void clear_serror(void) +static void clear_serror(struct ata_port *ap) { u32 val; - val = core_scr_read(SCR_ERROR); - core_scr_write(SCR_ERROR, val); + sata_dwc_scr_read(&ap->link, SCR_ERROR, &val); + sata_dwc_scr_write(&ap->link, SCR_ERROR, val); } static void clear_interrupt_bit(struct sata_dwc_device *hsdev, u32 bit) @@ -498,7 +482,7 @@ static void sata_dwc_error_intr(struct ata_port *ap, ata_ehi_clear_desc(ehi); - serror = core_scr_read(SCR_ERROR); + sata_dwc_scr_read(&ap->link, SCR_ERROR, &serror); status = ap->ops->sff_check_status(ap); tag = ap->link.active_tag; @@ -509,7 +493,7 @@ static void sata_dwc_error_intr(struct ata_port *ap, hsdevp->dma_pending[tag], hsdevp->cmd_issued[tag]); /* Clear error register and interrupt bit */ - clear_serror(); + clear_serror(ap); clear_interrupt_bit(hsdev, SATA_DWC_INTPR_ERR); /* This is the only error happening now. TODO check for exact error */ @@ -548,7 +532,7 @@ static irqreturn_t sata_dwc_isr(int irq, void *dev_instance) int handled, num_processed, port = 0; uint intpr, sactive, sactive2, tag_mask; struct sata_dwc_device_port *hsdevp; - host_pvt.sata_dwc_sactive_issued = 0; + hsdev->sactive_issued = 0; spin_lock_irqsave(&host->lock, flags); @@ -577,7 +561,7 @@ static irqreturn_t sata_dwc_isr(int irq, void *dev_instance) if (hsdevp->cmd_issued[tag] != SATA_DWC_CMD_ISSUED_PEND) dev_warn(ap->dev, "CMD tag=%d not pending?\n", tag); - host_pvt.sata_dwc_sactive_issued |= qcmd_tag_to_mask(tag); + hsdev->sactive_issued |= qcmd_tag_to_mask(tag); qc = ata_qc_from_tag(ap, tag); /* @@ -591,11 +575,11 @@ static irqreturn_t sata_dwc_isr(int irq, void *dev_instance) handled = 1; goto DONE; } - sactive = core_scr_read(SCR_ACTIVE); - tag_mask = (host_pvt.sata_dwc_sactive_issued | sactive) ^ sactive; + sata_dwc_scr_read(&ap->link, SCR_ACTIVE, &sactive); + tag_mask = (hsdev->sactive_issued | sactive) ^ sactive; /* If no sactive issued and tag_mask is zero then this is not NCQ */ - if (host_pvt.sata_dwc_sactive_issued == 0 && tag_mask == 0) { + if (hsdev->sactive_issued == 0 && tag_mask == 0) { if (ap->link.active_tag == ATA_TAG_POISON) tag = 0; else @@ -665,22 +649,19 @@ DRVSTILLBUSY: */ /* process completed commands */ - sactive = core_scr_read(SCR_ACTIVE); - tag_mask = (host_pvt.sata_dwc_sactive_issued | sactive) ^ sactive; + sata_dwc_scr_read(&ap->link, SCR_ACTIVE, &sactive); + tag_mask = (hsdev->sactive_issued | sactive) ^ sactive; - if (sactive != 0 || (host_pvt.sata_dwc_sactive_issued) > 1 || \ - tag_mask > 1) { + if (sactive != 0 || hsdev->sactive_issued > 1 || tag_mask > 1) { dev_dbg(ap->dev, "%s NCQ:sactive=0x%08x sactive_issued=0x%08x tag_mask=0x%08x\n", - __func__, sactive, host_pvt.sata_dwc_sactive_issued, - tag_mask); + __func__, sactive, hsdev->sactive_issued, tag_mask); } - if ((tag_mask | (host_pvt.sata_dwc_sactive_issued)) != \ - (host_pvt.sata_dwc_sactive_issued)) { + if ((tag_mask | hsdev->sactive_issued) != hsdev->sactive_issued) { dev_warn(ap->dev, - "Bad tag mask? sactive=0x%08x (host_pvt.sata_dwc_sactive_issued)=0x%08x tag_mask=0x%08x\n", - sactive, host_pvt.sata_dwc_sactive_issued, tag_mask); + "Bad tag mask? sactive=0x%08x sactive_issued=0x%08x tag_mask=0x%08x\n", + sactive, hsdev->sactive_issued, tag_mask); } /* read just to clear ... not bad if currently still busy */ @@ -742,7 +723,7 @@ STILLBUSY: * we were processing --we read status as part of processing a completed * command). */ - sactive2 = core_scr_read(SCR_ACTIVE); + sata_dwc_scr_read(&ap->link, SCR_ACTIVE, &sactive2); if (sactive2 != sactive) { dev_dbg(ap->dev, "More completed - sactive=0x%x sactive2=0x%x\n", @@ -828,8 +809,9 @@ static int sata_dwc_qc_complete(struct ata_port *ap, struct ata_queued_cmd *qc, u8 status = 0; u32 mask = 0x0; u8 tag = qc->tag; + struct sata_dwc_device *hsdev = HSDEV_FROM_AP(ap); struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap); - host_pvt.sata_dwc_sactive_queued = 0; + hsdev->sactive_queued = 0; dev_dbg(ap->dev, "%s checkstatus? %x\n", __func__, check_status); if (hsdevp->dma_pending[tag] == SATA_DWC_DMA_PENDING_TX) @@ -842,10 +824,8 @@ static int sata_dwc_qc_complete(struct ata_port *ap, struct ata_queued_cmd *qc, /* clear active bit */ mask = (~(qcmd_tag_to_mask(tag))); - host_pvt.sata_dwc_sactive_queued = (host_pvt.sata_dwc_sactive_queued) \ - & mask; - host_pvt.sata_dwc_sactive_issued = (host_pvt.sata_dwc_sactive_issued) \ - & mask; + hsdev->sactive_queued = hsdev->sactive_queued & mask; + hsdev->sactive_issued = hsdev->sactive_issued & mask; ata_qc_complete(qc); return 0; } @@ -974,7 +954,7 @@ static int sata_dwc_port_start(struct ata_port *ap) } /* Clear any error bits before libata starts issuing commands */ - clear_serror(); + clear_serror(ap); ap->private_data = hsdevp; dev_dbg(ap->dev, "%s: done\n", __func__); return 0; @@ -1025,7 +1005,7 @@ static void sata_dwc_exec_command_by_tag(struct ata_port *ap, * managed SError register for the disk needs to be done before the * task file is loaded. */ - clear_serror(); + clear_serror(ap); ata_sff_exec_command(ap, tf); } @@ -1078,7 +1058,7 @@ static void sata_dwc_bmdma_start_by_tag(struct ata_queued_cmd *qc, u8 tag) sata_dwc_tf_dump(ap, &qc->tf); if (start_dma) { - reg = core_scr_read(SCR_ERROR); + sata_dwc_scr_read(&ap->link, SCR_ERROR, ®); if (reg & SATA_DWC_SERROR_ERR_BITS) { dev_err(ap->dev, "%s: ****** SError=0x%08x ******\n", __func__, reg); @@ -1140,9 +1120,9 @@ static unsigned int sata_dwc_qc_issue(struct ata_queued_cmd *qc) } if (ata_is_ncq(qc->tf.protocol)) { - sactive = core_scr_read(SCR_ACTIVE); + sata_dwc_scr_read(&ap->link, SCR_ACTIVE, &sactive); sactive |= (0x00000001 << tag); - core_scr_write(SCR_ACTIVE, sactive); + sata_dwc_scr_write(&ap->link, SCR_ACTIVE, sactive); dev_dbg(qc->ap->dev, "%s: tag=%d ap->link.sactive = 0x%08x sactive=0x%08x\n", @@ -1300,7 +1280,6 @@ static int sata_dwc_probe(struct platform_device *ofdev) /* Setup port */ host->ports[0]->ioaddr.cmd_addr = base; host->ports[0]->ioaddr.scr_addr = base + SATA_DWC_SCR_OFFSET; - host_pvt.scr_addr_sstatus = base + SATA_DWC_SCR_OFFSET; sata_dwc_setup_port(&host->ports[0]->ioaddr, (unsigned long)base); /* Read the ID and Version Registers */ -- 2.8.0.rc3