From mboxrd@z Thu Jan 1 00:00:00 1970 From: James Bottomley Subject: [PATCH] aic7xxx: move to dma_get_required_mask() and correct 39 bit assumptions Date: Tue, 30 Aug 2005 11:48:07 -0500 Message-ID: <1125420487.5037.27.camel@mulgrave> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: Received: from stat16.steeleye.com ([209.192.50.48]:55457 "EHLO hancock.sc.steeleye.com") by vger.kernel.org with ESMTP id S932221AbVH3Qs0 (ORCPT ); Tue, 30 Aug 2005 12:48:26 -0400 Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Dave Jones Cc: SCSI Mailing List , luben_tuikov@adaptec.com This patch moves aic7xxx over to the dma_get_required_mask() API and dumps its open coded memory check. It also appears from this bug: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=167049 That 39 bit addressing doesn't work on older cards. I surmise that the AHC_LARGE_SCBS flag is the one that marks cards capable of using 39 bit addressing, so I also folded that check into the code. Luben, since you have access to the docs, could you confirm this guess. Dave, could you see if this fixes the problem for the bug reporter. James diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.c b/drivers/scsi/aic7xxx/aic7xxx_osm.c --- a/drivers/scsi/aic7xxx/aic7xxx_osm.c +++ b/drivers/scsi/aic7xxx/aic7xxx_osm.c @@ -1036,15 +1036,6 @@ ahc_linux_register_host(struct ahc_softc return (0); } -uint64_t -ahc_linux_get_memsize(void) -{ - struct sysinfo si; - - si_meminfo(&si); - return ((uint64_t)si.totalram << PAGE_SHIFT); -} - /* * Place the SCSI bus into a known state by either resetting it, * or forcing transfer negotiations on the next command to any diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.h b/drivers/scsi/aic7xxx/aic7xxx_osm.h --- a/drivers/scsi/aic7xxx/aic7xxx_osm.h +++ b/drivers/scsi/aic7xxx/aic7xxx_osm.h @@ -494,8 +494,6 @@ ahc_insb(struct ahc_softc * ahc, long po int ahc_linux_register_host(struct ahc_softc *, struct scsi_host_template *); -uint64_t ahc_linux_get_memsize(void); - /*************************** Pretty Printing **********************************/ struct info_str { char *buffer; diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c b/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c --- a/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c +++ b/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c @@ -180,6 +180,7 @@ ahc_linux_pci_dev_probe(struct pci_dev * struct ahc_pci_identity *entry; char *name; int error; + struct device *dev = &pdev->dev; pci = pdev; entry = ahc_find_pci_device(pci); @@ -209,11 +210,12 @@ ahc_linux_pci_dev_probe(struct pci_dev * pci_set_master(pdev); if (sizeof(dma_addr_t) > 4 - && ahc_linux_get_memsize() > 0x80000000 - && pci_set_dma_mask(pdev, mask_39bit) == 0) { + && ahc->features & AHC_LARGE_SCBS + && dma_set_mask(dev, mask_39bit) == 0 + && dma_get_required_mask(dev) > DMA_32BIT_MASK) { ahc->flags |= AHC_39BIT_ADDRESSING; } else { - if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) { + if (dma_set_mask(dev, DMA_32BIT_MASK)) { printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n"); return (-ENODEV); }