From patchwork Thu Sep 24 04:28:57 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiang Liu X-Patchwork-Id: 7253611 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 88B2BBEEC1 for ; Thu, 24 Sep 2015 04:29:10 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 26CB920943 for ; Thu, 24 Sep 2015 04:29:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8D5B82092B for ; Thu, 24 Sep 2015 04:29:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750835AbbIXE3G (ORCPT ); Thu, 24 Sep 2015 00:29:06 -0400 Received: from mga09.intel.com ([134.134.136.24]:32895 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750759AbbIXE3D (ORCPT ); Thu, 24 Sep 2015 00:29:03 -0400 Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga102.jf.intel.com with ESMTP; 23 Sep 2015 21:29:02 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,579,1437462000"; d="scan'208,223";a="651234339" Received: from jliu23-mobl.ccr.corp.intel.com (HELO [10.238.131.66]) ([10.238.131.66]) by orsmga003.jf.intel.com with ESMTP; 23 Sep 2015 21:28:58 -0700 Subject: Re: [RFT v3] eata: Convert eata driver as normal PCI and platform device drivers To: James Bottomley , Arthur Marsh References: <20150916134211.GA21535@infradead.org> <1442907023-12709-1-git-send-email-jiang.liu@linux.intel.com> <5601D550.5000801@internode.on.net> <1442961929.15264.4.camel@HansenPartnership.com> <5601E5FE.7020706@internode.on.net> <56023771.5010006@linux.intel.com> <5602829C.5090500@internode.on.net> <1443019207.2240.27.camel@HansenPartnership.com> Cc: Thomas Gleixner , Bjorn Helgaas , Hannes Reinecke , Ballabio Dario , Christoph Hellwig , Dario Ballabio , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-scsi@vger.kernel.org, x86@kernel.org From: Jiang Liu Organization: Intel Message-ID: <56037C09.5050201@linux.intel.com> Date: Thu, 24 Sep 2015 12:28:57 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.1.0 MIME-Version: 1.0 In-Reply-To: <1443019207.2240.27.camel@HansenPartnership.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, T_TVD_MIME_EPI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP On 2015/9/23 22:40, James Bottomley wrote: > On Wed, 2015-09-23 at 20:14 +0930, Arthur Marsh wrote: >> >> Jiang Liu wrote on 23/09/15 14:54: >> >>> Hi Arthur, >>> I have found the cause of the warning messages, it's caused >>> by a flaw in the conversion. But according to my understanding, >>> it isn't related to the kexec/kdump failure. Could you please help >>> to test the attached new version? >>> Thanks! >>> Gerry >>> >> >> Thanks, the patch worked, I could successfully unload and reload the >> eata module, and perform a kexec reboot with the eata module loading >> successfully afterwards. > > Great, so the bug was unconditionally unregistering the platform driver > when it would fail to attach if none of the legacy IO ports were > detected. > > I think the driver needs a bit of a tidy up. There's no need at all to > use ida_get_simple(): the only reason for a dense array of numbers was > for storing the hba private data in the array you got rid of; we can now > simply use shost->host_no ... it's more useful anyway because the > numbers match those SCSI is using. > > Also, if you insist on converting the printk's to dev warn, you no > longer need to print out the driver name ... dev_printk already prints > out the device and driver name as the prefix. > > The if (error == 0) is usually written as if (!error) but that's minor. Hi James, Thanks for review. How about the attached patch which addresses the three suggestions from you? Thanks! Gerry > > Thanks for doing the conversion, > > James > > From aeb4859ff2c86434814cfc88f1a36481f3dcbc86 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Thu, 24 Sep 2015 12:24:33 +0800 Subject: [PATCH] Signed-off-by: Jiang Liu --- drivers/scsi/eata.c | 234 +++++++++++++++++++++------------------------------ 1 file changed, 97 insertions(+), 137 deletions(-) diff --git a/drivers/scsi/eata.c b/drivers/scsi/eata.c index 11813a72c2e9..ceeba4d7b4ff 100644 --- a/drivers/scsi/eata.c +++ b/drivers/scsi/eata.c @@ -487,7 +487,6 @@ #include #include #include -#include #include #include #include @@ -818,7 +817,6 @@ struct hostdata { unsigned int cp_stat[MAX_MAILBOXES]; /* FREE, IN_USE, LOCKED, IN_RESET */ unsigned int last_cp_used; /* Index of last mailbox used */ unsigned int iocount; /* Total i/o done for this board */ - int board_number; /* Number of this board */ char board_name[16]; /* Name of this board */ int in_reset; /* True if board is doing a reset */ int target_to[MAX_TARGET][MAX_CHANNEL]; /* N. of timeout errors on target */ @@ -835,7 +833,6 @@ struct hostdata { }; static const char *driver_name = "EATA"; -static DEFINE_IDA(eata2x_ida); static struct platform_device *eata2x_platform_devs[MAX_BOARDS]; static bool eata2x_platform_driver_registered; @@ -864,6 +861,10 @@ static unsigned long io_port[] = { #define DEV2H(x) be32_to_cpu(x) #define H2DEV16(x) cpu_to_be16(x) #define DEV2H16(x) be16_to_cpu(x) +#define dev_warn_on(dev, cond, fmt, ...) \ + if (cond) dev_warn(dev, fmt, ##__VA_ARGS__) +#define dev_info_on(dev, cond, fmt, ...) \ + if (cond) dev_info(dev, fmt, ##__VA_ARGS__) /* But transfer orientation from the 16 bit data register is Little Endian */ #define REG2H(x) le16_to_cpu(x) @@ -1029,47 +1030,32 @@ static int port_detect(unsigned long port_base, struct device *dev) unsigned char dma_channel_table[4] = { 5, 6, 7, 0 }; struct Scsi_Host *shost; struct hostdata *ha; - char name[16]; - int idx, ret = -ENODEV; - - idx = ida_simple_get(&eata2x_ida, 0, MAX_BOARDS, GFP_KERNEL); - if (idx < 0) { - ret = idx; - goto fail; - } + int ret = -ENODEV; shost = scsi_host_alloc(&driver_template, sizeof(struct hostdata)); if (shost == NULL) { - dev_warn(dev, "%s: unable to alloc host, detaching.\n", - driver_name); + dev_warn(dev, "unable to alloc host, detaching.\n"); ret = -ENOMEM; - goto freeid; + goto fail; } - sprintf(name, "%s%d", driver_name, idx); - if (!request_region(port_base, REGION_SIZE, driver_name)) { -#if defined(DEBUG_DETECT) - printk("%s: address 0x%03lx in use, skipping probe.\n", name, - port_base); -#endif + dev_warn_on(dev, config_enabled(DEBUG_DETECT), + "address 0x%03lx in use, skipping probe.\n", + port_base); goto freeshost; } if (do_dma(port_base, 0, READ_CONFIG_PIO)) { -#if defined(DEBUG_DETECT) - printk("%s: detect, do_dma failed at 0x%03lx.\n", name, - port_base); -#endif + dev_warn_on(dev, config_enabled(DEBUG_DETECT), + "detect, do_dma failed at 0x%03lx.\n", port_base); goto freelock; } /* Read the info structure */ if (read_pio(port_base, (ushort *) & info, (ushort *) & info.ipad[0])) { -#if defined(DEBUG_DETECT) - printk("%s: detect, read_pio failed at 0x%03lx.\n", name, - port_base); -#endif + dev_warn_on(dev, config_enabled(DEBUG_DETECT), + "detect, read_pio failed at 0x%03lx.\n", port_base); goto freelock; } @@ -1083,16 +1069,15 @@ static int port_detect(unsigned long port_base, struct device *dev) /* Check the controller "EATA" signature */ if (info.sign != EATA_SIG_BE) { -#if defined(DEBUG_DETECT) - printk("%s: signature 0x%04x discarded.\n", name, info.sign); -#endif + dev_warn_on(dev, config_enabled(DEBUG_DETECT), + "signature 0x%04x discarded.\n", info.sign); goto freelock; } if (info.data_len < EATA_2_0A_SIZE) { - printk - ("%s: config structure size (%d bytes) too short, detaching.\n", - name, info.data_len); + dev_warn(dev, + "config structure size (%d bytes) too short, detaching.\n", + info.data_len); goto freelock; } else if (info.data_len == EATA_2_0A_SIZE) protocol_rev = 'A'; @@ -1102,7 +1087,7 @@ static int port_detect(unsigned long port_base, struct device *dev) protocol_rev = 'C'; if (protocol_rev != 'A' && info.forcaddr) { - printk("%s: warning, port address has been forced.\n", name); + dev_warn(dev, "warning, port address has been forced.\n"); bus_type = "PCI"; is_pci = 1; subversion = ESA; @@ -1128,47 +1113,40 @@ static int port_detect(unsigned long port_base, struct device *dev) } if (!info.haaval || info.ata) { - printk - ("%s: address 0x%03lx, unusable %s board (%d%d), detaching.\n", - name, port_base, bus_type, info.haaval, info.ata); + dev_warn(dev, + "address 0x%03lx, unusable %s board (%d%d), detaching.\n", + port_base, bus_type, info.haaval, info.ata); goto freelock; } if (info.drqvld) { - if (subversion == ESA) - printk("%s: warning, weird %s board using DMA.\n", name, - bus_type); - + dev_warn_on(dev, subversion == ESA, + "warning, weird %s board using DMA.\n", bus_type); subversion = ISA; dma_channel = dma_channel_table[3 - info.drqx]; } else { - if (subversion == ISA) - printk("%s: warning, weird %s board not using DMA.\n", - name, bus_type); - + dev_warn_on(dev, subversion == ISA, + "warning, weird %s board not using DMA.\n", + bus_type); subversion = ESA; dma_channel = NO_DMA; } - if (!info.dmasup) - printk("%s: warning, DMA protocol support not asserted.\n", - name); + dev_warn_on(dev, !info.dmasup, + "warning, DMA protocol support not asserted.\n"); irq = info.irq; - - if (subversion == ESA && !info.irq_tr) - printk - ("%s: warning, LEVEL triggering is suggested for IRQ %u.\n", - name, irq); + dev_info_on(dev, subversion == ESA && !info.irq_tr, + "warning, LEVEL triggering is suggested for IRQ %u.\n", + irq); if (dev_is_pci(dev)) pdev = to_pci_dev(dev); - if (is_pci && !pdev) - dev_warn(dev, "%s: warning, failed to get pci_dev structure.\n", - name); + dev_warn_on(dev, is_pci && !pdev, + "warning, failed to get pci_dev structure.\n"); if (pdev && (irq != pdev->irq)) { - printk("%s: IRQ %u mapped to IO-APIC IRQ %u.\n", name, irq, - pdev->irq); + dev_info(dev, "IRQ %u mapped to IO-APIC IRQ %u.\n", + irq, pdev->irq); irq = pdev->irq; } @@ -1176,14 +1154,13 @@ static int port_detect(unsigned long port_base, struct device *dev) if (request_irq(irq, do_interrupt_handler, (subversion == ESA) ? IRQF_SHARED : 0, driver_name, shost)) { - printk("%s: unable to allocate IRQ %u, detaching.\n", name, - irq); + dev_warn(dev, "unable to allocate IRQ %u, detaching.\n", irq); goto freelock; } if (subversion == ISA && request_dma(dma_channel, driver_name)) { - printk("%s: unable to allocate DMA channel %u, detaching.\n", - name, dma_channel); + dev_warn(dev, "unable to allocate DMA channel %u, detaching.\n", + dma_channel); goto freeirq; } #if defined(FORCE_CONFIG) @@ -1195,9 +1172,8 @@ static int port_detect(unsigned long port_base, struct device *dev) &cf_dma_addr); if (!cf) { - printk - ("%s: config, pci_alloc_consistent failed, detaching.\n", - name); + dev_warn(dev, + "config, pci_alloc_consistent failed, detaching.\n"); goto freedma; } @@ -1206,9 +1182,8 @@ static int port_detect(unsigned long port_base, struct device *dev) cf->ocena = 1; if (do_dma(port_base, cf_dma_addr, SET_CONFIG_DMA)) { - printk - ("%s: busy timeout sending configuration, detaching.\n", - name); + dev_warn(dev, + "busy timeout sending configuration, detaching.\n"); pci_free_consistent(pdev, sizeof(struct eata_config), cf, cf_dma_addr); goto freedma; @@ -1234,7 +1209,6 @@ static int port_detect(unsigned long port_base, struct device *dev) ha->protocol_rev = protocol_rev; ha->is_pci = is_pci; ha->pdev = pdev; - ha->board_number = idx; if (ha->subversion == ESA) shost->unchecked_isa_dma = 0; @@ -1251,19 +1225,19 @@ static int port_detect(unsigned long port_base, struct device *dev) } - strcpy(ha->board_name, name); + sprintf(ha->board_name, "%s%d", driver_name, shost->host_no); /* DPT PM2012 does not allow to detect sg_tablesize correctly */ if (shost->sg_tablesize > MAX_SGLIST || shost->sg_tablesize < 2) { - printk("%s: detect, wrong n. of SG lists %d, fixed.\n", - ha->board_name, shost->sg_tablesize); + dev_info(dev, "detect, wrong n. of SG lists %d, fixed.\n", + shost->sg_tablesize); shost->sg_tablesize = MAX_SGLIST; } /* DPT PM2012 does not allow to detect can_queue correctly */ if (shost->can_queue > MAX_MAILBOXES || shost->can_queue < 2) { - printk("%s: detect, wrong n. of mbox %d, fixed.\n", - ha->board_name, shost->can_queue); + dev_info(dev, "detect, wrong n. of mbox %d, fixed.\n", + shost->can_queue); shost->can_queue = MAX_MAILBOXES; } @@ -1299,9 +1273,9 @@ static int port_detect(unsigned long port_base, struct device *dev) gfp_t gfp_mask = (shost->unchecked_isa_dma ? GFP_DMA : 0) | GFP_ATOMIC; ha->cp[i].sglist = kmalloc(sz, gfp_mask); if (!ha->cp[i].sglist) { - printk - ("%s: kmalloc SGlist failed, mbox %d, detaching.\n", - ha->board_name, i); + dev_err(dev, + "kmalloc SGlist failed, mbox %d, detaching.\n", + i); goto free_cp_dma_addr; } } @@ -1309,7 +1283,7 @@ static int port_detect(unsigned long port_base, struct device *dev) if (!(ha->sp_cpu_addr = pci_alloc_consistent(ha->pdev, sizeof(struct mssp), &ha->sp_dma_addr))) { - printk("%s: pci_alloc_consistent failed, detaching.\n", ha->board_name); + dev_err(dev, "pci_alloc_consistent failed, detaching.\n"); goto free_sglist; } @@ -1322,61 +1296,52 @@ static int port_detect(unsigned long port_base, struct device *dev) if (tag_mode != TAG_DISABLED && tag_mode != TAG_SIMPLE) tag_mode = TAG_ORDERED; - if (idx == 0) { - printk - ("EATA/DMA 2.0x: Copyright (C) 1994-2003 Dario Ballabio.\n"); - printk - ("%s config options -> tm:%d, lc:%c, mq:%d, rs:%c, et:%c, " - "ip:%c, ep:%c, pp:%c.\n", driver_name, tag_mode, - YESNO(linked_comm), max_queue_depth, YESNO(rev_scan), - YESNO(ext_tran), YESNO(isa_probe), YESNO(eisa_probe), - YESNO(pci_probe)); - } - - printk("%s: 2.0%c, %s 0x%03lx, IRQ %u, %s, SG %d, MB %d.\n", - ha->board_name, ha->protocol_rev, bus_type, - (unsigned long)shost->io_port, shost->irq, dma_name, - shost->sg_tablesize, shost->can_queue); - - if (shost->max_id > 8 || shost->max_lun > 8) - printk - ("%s: wide SCSI support enabled, max_id %u, max_lun %llu.\n", - ha->board_name, shost->max_id, shost->max_lun); + dev_info_once(dev, + "EATA/DMA 2.0x: Copyright (C) 1994-2003 Dario Ballabio.\n"); + dev_info_once(dev, + "config options -> tm:%d, lc:%c, mq:%d, rs:%c, et:%c, " + "ip:%c, ep:%c, pp:%c.\n", tag_mode, YESNO(linked_comm), + max_queue_depth, YESNO(rev_scan), YESNO(ext_tran), + YESNO(isa_probe), YESNO(eisa_probe), YESNO(pci_probe)); + + dev_info(dev, "2.0%c, %s 0x%03lx, IRQ %u, %s, SG %d, MB %d.\n", + ha->protocol_rev, bus_type, (unsigned long)shost->io_port, + shost->irq, dma_name, shost->sg_tablesize, shost->can_queue); + dev_info_on(dev, shost->max_id > 8 || shost->max_lun > 8, + "wide SCSI support enabled, max_id %u, max_lun %llu.\n", + shost->max_id, shost->max_lun); for (i = 0; i <= shost->max_channel; i++) - printk("%s: SCSI channel %u enabled, host target ID %d.\n", - ha->board_name, i, info.host_addr[3 - i]); - -#if defined(DEBUG_DETECT) - printk("%s: Vers. 0x%x, ocs %u, tar %u, trnxfr %u, more %u, SYNC 0x%x, " - "sec. %u, infol %d, cpl %d spl %d.\n", name, info.version, - info.ocsena, info.tarsup, info.trnxfr, info.morsup, info.sync, - info.second, info.data_len, info.cp_len, info.sp_len); - - if (protocol_rev == 'B' || protocol_rev == 'C') - printk("%s: isaena %u, forcaddr %u, max_id %u, max_chan %u, " - "large_sg %u, res1 %u.\n", name, info.isaena, - info.forcaddr, info.max_id, info.max_chan, info.large_sg, - info.res1); - - if (protocol_rev == 'C') - printk("%s: max_lun %u, m1 %u, idquest %u, pci %u, eisa %u, " - "raidnum %u.\n", name, info.max_lun, info.m1, - info.idquest, info.pci, info.eisa, info.raidnum); -#endif + dev_info(dev, "SCSI channel %u enabled, host target ID %d.\n", + i, info.host_addr[3 - i]); + + dev_info_on(dev, config_enabled(DEBUG_DETECT), + "Vers. 0x%x, ocs %u, tar %u, trnxfr %u, more %u, SYNC 0x%x, " + "sec. %u, infol %d, cpl %d spl %d.\n", info.version, + info.ocsena, info.tarsup, info.trnxfr, info.morsup, + info.sync, info.second, info.data_len, info.cp_len, + info.sp_len); + dev_info_on(dev, config_enabled(DEBUG_DETECT) && + (protocol_rev == 'B' || protocol_rev == 'C'), + "isaena %u, forcaddr %u, max_id %u, max_chan %u, " + "large_sg %u, res1 %u.\n", info.isaena, info.forcaddr, + info.max_id, info.max_chan, info.large_sg, info.res1); + dev_info_on(dev, config_enabled(DEBUG_DETECT) && protocol_rev == 'C', + "max_lun %u, m1 %u, idquest %u, pci %u, eisa %u, raidnum %u.\n", + info.max_lun, info.m1, info.idquest, info.pci, info.eisa, + info.raidnum); if (ha->pdev) { pci_set_master(ha->pdev); if (pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(32))) - printk("%s: warning, pci_set_dma_mask failed.\n", - ha->board_name); + dev_warn(dev, "warning, pci_set_dma_mask failed.\n"); } ret = scsi_add_host(shost, NULL); if (!ret) { dev_set_drvdata(dev, shost); scsi_scan_host(shost); - return idx; + return 0; } if (ha->sp_cpu_addr) @@ -1400,8 +1365,6 @@ freelock: release_region(port_base, REGION_SIZE); freeshost: scsi_host_put(shost); -freeid: - ida_simple_remove(&eata2x_ida, idx); fail: return ret; } @@ -1429,7 +1392,6 @@ static void port_remove(struct device *dev) free_dma(shost->dma_channel); free_irq(shost->irq, shost); release_region(shost->io_port, shost->n_io_port); - ida_simple_remove(&eata2x_ida, ha->board_number); scsi_host_put(shost); } @@ -1513,19 +1475,17 @@ static int eata2x_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) unsigned long port_base; if (pci_enable_device(dev)) { - if (config_enabled(DEBUG_PCI_DETECT)) - pr_warn("%s: detect, bus %d, devfn 0x%x, pci_enable_device failed.\n", - driver_name, dev->bus->number, dev->devfn); + dev_warn_on(&dev->dev, config_enabled(DEBUG_PCI_DETECT), + "detect, bus %d, devfn 0x%x, pci_enable_device failed.\n", + dev->bus->number, dev->devfn); goto out_error; } addr = pci_resource_start(dev, 0); port_base = addr + PCI_BASE_ADDRESS_0; - if (config_enabled(DEBUG_PCI_DETECT)) - dev_dbg(&dev->dev, - "%s: detect, bus %d, devfn 0x%x, addr 0x%x.\n", - driver_name, dev->bus->number, dev->devfn, - (unsigned int)addr); + dev_info_on(&dev->dev, config_enabled(DEBUG_PCI_DETECT), + "detect, bus %d, devfn 0x%x, addr 0x%x.\n", + dev->bus->number, dev->devfn, (unsigned int)addr); if (setup_done) { /* @@ -1576,7 +1536,7 @@ static int eata2x_register_pci_driver(void) return 0; if (!pci_register_driver(&eata2x_pci_driver)) return 1; - pr_warn("%s: failed to register PCI device driver.\n", driver_name); + pr_warn("failed to register PCI device driver.\n"); return -ENODEV; } @@ -1637,7 +1597,7 @@ static int eata2x_probe_platform_devices(void) if (!eisa_probe) io_port[k] = SKIP; } - for (k = 0; error == 0 && io_port[k]; k++) { + for (k = 0; !error && io_port[k]; k++) { if (io_port[k] == SKIP) continue; res.start = io_port[k]; @@ -1649,9 +1609,9 @@ static int eata2x_probe_platform_devices(void) else eata2x_platform_devs[idx++] = pdev; } - if (error == 0) { + if (!error) { error = platform_driver_probe(driver, eata2x_platform_probe); - if (error == 0) + if (!error) eata2x_platform_driver_registered = true; } for (k = 0; k < idx; k++) { -- 1.7.10.4