On Thu, 2007-02-08 at 19:40 +0000, Christoph Hellwig wrote:
> The logic here seems odd to me. Shouldn't we first check
> dma_get_required_mask and the do dma_set_mask?
Yes ... I picked up the mask problem, but not that. And actually
there's a missing zero check on one of the dma_set_mask()s.
Does this look like the right patch then?
James
>From 095ec6c45d80171b31ee04da62618dcad31b8aef Mon Sep 17 00:00:00 2001
From: Hannes Reinecke <hare@xxxxxxx>
Date: Wed, 7 Feb 2007 09:47:44 +0100
Subject: [SCSI] aic79xx: use dma_get_required_mask()
As originally noted by Frederic Temporelli, the aic79xx supports 64
bit addressing, but the initialization code of the driver is wrong: it
tests the available memory size instead of testing the maximum
available memory address.
This patch uses the correct dma_get_required_mask() macros to
determine the correct addressing method.
Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
Cc: Xavier Bru <xavier.bru@xxxxxxxx>
CC: Frederic Temporelli <frederic.temporelli@xxxxxxxx>
cosmetic fixes
Signed-off-by: James Bottomley <James.Bottomley@xxxxxxxxxxxx>
---
drivers/scsi/aic7xxx/aic79xx_osm.c | 9 ---------
drivers/scsi/aic7xxx/aic79xx_osm.h | 2 --
drivers/scsi/aic7xxx/aic79xx_osm_pci.c | 20 +++++++++-----------
3 files changed, 9 insertions(+), 22 deletions(-)
Index: scsi-misc-2.6/drivers/scsi/aic7xxx/aic79xx_osm.c
===================================================================
--- scsi-misc-2.6.orig/drivers/scsi/aic7xxx/aic79xx_osm.c 2007-02-09 09:12:55.000000000 -0500
+++ scsi-misc-2.6/drivers/scsi/aic7xxx/aic79xx_osm.c 2007-02-09 09:17:36.000000000 -0500
@@ -1126,15 +1126,6 @@ ahd_linux_register_host(struct ahd_softc
return 0;
}
-uint64_t
-ahd_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
Index: scsi-misc-2.6/drivers/scsi/aic7xxx/aic79xx_osm.h
===================================================================
--- scsi-misc-2.6.orig/drivers/scsi/aic7xxx/aic79xx_osm.h 2007-02-09 09:12:55.000000000 -0500
+++ scsi-misc-2.6/drivers/scsi/aic7xxx/aic79xx_osm.h 2007-02-09 09:17:36.000000000 -0500
@@ -496,8 +496,6 @@ ahd_insb(struct ahd_softc * ahd, long po
int ahd_linux_register_host(struct ahd_softc *,
struct scsi_host_template *);
-uint64_t ahd_linux_get_memsize(void);
-
/*************************** Pretty Printing **********************************/
struct info_str {
char *buffer;
Index: scsi-misc-2.6/drivers/scsi/aic7xxx/aic79xx_osm_pci.c
===================================================================
--- scsi-misc-2.6.orig/drivers/scsi/aic7xxx/aic79xx_osm_pci.c 2007-02-09 09:12:55.000000000 -0500
+++ scsi-misc-2.6/drivers/scsi/aic7xxx/aic79xx_osm_pci.c 2007-02-09 09:21:32.000000000 -0500
@@ -132,6 +132,7 @@ ahd_linux_pci_dev_probe(struct pci_dev *
struct ahd_pci_identity *entry;
char *name;
int error;
+ struct device *dev = &pdev->dev;
pci = pdev;
entry = ahd_find_pci_device(pci);
@@ -161,20 +162,16 @@ ahd_linux_pci_dev_probe(struct pci_dev *
pci_set_master(pdev);
if (sizeof(dma_addr_t) > 4) {
- uint64_t memsize;
- const uint64_t mask_39bit = 0x7FFFFFFFFFULL;
-
- memsize = ahd_linux_get_memsize();
-
- if (memsize >= 0x8000000000ULL
- && pci_set_dma_mask(pdev, DMA_64BIT_MASK) == 0) {
+ if (dma_get_required_mask(dev) > DMA_39BIT_MASK
+ && dma_set_mask(dev, DMA_64BIT_MASK) == 0)
ahd->flags |= AHD_64BIT_ADDRESSING;
- } else if (memsize > 0x80000000
- && pci_set_dma_mask(pdev, mask_39bit) == 0) {
+ else if (dma_get_required_mask(dev) > DMA_32BIT_MASK
+ && dma_set_mask(dev, DMA_39BIT_MASK) == 0)
ahd->flags |= AHD_39BIT_ADDRESSING;
- }
+ else
+ dma_set_mask(dev, DMA_32BIT_MASK);
} else {
- pci_set_dma_mask(pdev, DMA_32BIT_MASK);
+ dma_set_mask(dev, DMA_32BIT_MASK);
}
ahd->dev_softc = pci;
error = ahd_pci_config(ahd, entry);
-
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