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Message-Id: <200803181419.08687.bzolnier@gmail.com>
Date: Tue, 18 Mar 2008 14:19:08 +0100
From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To: Jiri Slaby <jirislaby@...il.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org
Subject: Re: [PATCH 1/1] IDE: fix ide.h compiler warning
On Sunday 16 March 2008, Jiri Slaby wrote:
> Fix following compiler warning by returning EINVAL
> In file included from ANYTHING-INCLUDING-IDE.H:45:
> include/linux/ide.h: In function ‘ide_hwif_setup_dma’:
> include/linux/ide.h:1022: warning: no return statement in function returning non-void
>
> This fix is only for CONFIG_BLK_DEV_IDEDMA_PCI=n configs and is introduced by
> ide: do complete DMA setup in ->init_dma method.
>
> Signed-off-by: Jiri Slaby <jirislaby@...il.com>
> Cc: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Thanks! I integrated it into guilty patch to preserve bisectability.
From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Subject: [PATCH] ide: do complete DMA setup in ->init_dma method (take 2)
* Make ide_hwif_setup_dma() return an error value.
* Pass 'const struct ide_port_info *d' instead of 'unsigned long dmabase'
to ->init_dma method and make it return an error value.
* Rename ide_get_or_set_dma_base() to ide_pci_dma_base(),
change ordering of its arguments and then export it.
* Export ide_pci_set_master().
* Do complete DMA setup inside ->init_dma method and update ->init_dma
users accordingly.
* Sanitize code for DMA setup in ide_init_port().
v2:
* Fix for CONFIG_BLK_DEV_IDEDMA_PCI=n configs
(from Jiri Slaby <jirislaby@...il.com>):
Fix following compiler warning by returning EINVAL:
In file included from ANYTHING-INCLUDING-IDE.H:45:
include/linux/ide.h: In function ‘ide_hwif_setup_dma’:
include/linux/ide.h:1022: warning: no return statement in function returning non-void
Cc: Jiri Slaby <jirislaby@...il.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
---
drivers/ide/ide-probe.c | 21 +++++++++++++++------
drivers/ide/pci/alim15x3.c | 27 +++++++++++++++++++++------
drivers/ide/pci/hpt366.c | 27 +++++++++++++++++++++------
drivers/ide/setup-pci.c | 31 ++++++++++++++-----------------
include/linux/ide.h | 14 ++++++++++----
5 files changed, 81 insertions(+), 39 deletions(-)
Index: b/drivers/ide/ide-probe.c
===================================================================
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -1355,9 +1355,6 @@ static void ide_init_port(ide_hwif_t *hw
if (d->init_iops)
d->init_iops(hwif);
- if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0)
- ide_hwif_setup_dma(hwif, d);
-
if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) ||
(d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS))
hwif->irq = port ? 15 : 14;
@@ -1376,9 +1373,21 @@ static void ide_init_port(ide_hwif_t *hw
hwif->mwdma_mask = d->mwdma_mask;
hwif->ultra_mask = d->udma_mask;
- /* reset DMA masks only for SFF-style DMA controllers */
- if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0 && hwif->dma_base == 0)
- hwif->swdma_mask = hwif->mwdma_mask = hwif->ultra_mask = 0;
+ if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) {
+ int rc;
+
+ if (d->init_dma)
+ rc = d->init_dma(hwif, d);
+ else
+ rc = ide_hwif_setup_dma(hwif, d);
+
+ if (rc < 0) {
+ printk(KERN_INFO "%s: DMA disabled\n", hwif->name);
+ hwif->swdma_mask = 0;
+ hwif->mwdma_mask = 0;
+ hwif->ultra_mask = 0;
+ }
+ }
if (d->host_flags & IDE_HFLAG_RQSIZE_256)
hwif->rqsize = 256;
Index: b/drivers/ide/pci/alim15x3.c
===================================================================
--- a/drivers/ide/pci/alim15x3.c
+++ b/drivers/ide/pci/alim15x3.c
@@ -723,17 +723,32 @@ static void __devinit init_hwif_ali15x3
/**
* init_dma_ali15x3 - set up DMA on ALi15x3
* @hwif: IDE interface
- * @dmabase: DMA interface base PCI address
+ * @d: IDE port info
*
- * Set up the DMA functionality on the ALi 15x3. For the ALi
- * controllers this is generic so we can let the generic code do
- * the actual work.
+ * Set up the DMA functionality on the ALi 15x3.
*/
-static void __devinit init_dma_ali15x3 (ide_hwif_t *hwif, unsigned long dmabase)
+static int __devinit init_dma_ali15x3(ide_hwif_t *hwif,
+ const struct ide_port_info *d)
{
+ struct pci_dev *dev = to_pci_dev(hwif->dev);
+ unsigned long base = ide_pci_dma_base(hwif, d);
+
+ if (base == 0 || ide_pci_set_master(dev, d->name) < 0)
+ return -1;
+
if (!hwif->channel)
- outb(inb(dmabase + 2) & 0x60, dmabase + 2);
+ outb(inb(base + 2) & 0x60, base + 2);
+
+ printk(KERN_INFO " %s: BM-DMA at 0x%04lx-0x%04lx\n",
+ hwif->name, base, base + 7);
+
+ if (ide_allocate_dma_engine(hwif))
+ return -1;
+
+ ide_setup_dma(hwif, base);
+
+ return 0;
}
static const struct ide_port_ops ali_port_ops = {
Index: b/drivers/ide/pci/hpt366.c
===================================================================
--- a/drivers/ide/pci/hpt366.c
+++ b/drivers/ide/pci/hpt366.c
@@ -1327,14 +1327,17 @@ static void __devinit init_hwif_hpt366(i
hwif->dma_lost_irq = &hpt366_dma_lost_irq;
}
-static void __devinit init_dma_hpt366(ide_hwif_t *hwif, unsigned long dmabase)
+static int __devinit init_dma_hpt366(ide_hwif_t *hwif,
+ const struct ide_port_info *d)
{
struct pci_dev *dev = to_pci_dev(hwif->dev);
- u8 masterdma = 0, slavedma = 0;
- u8 dma_new = 0, dma_old = 0;
- unsigned long flags;
+ unsigned long flags, base = ide_pci_dma_base(hwif, d);
+ u8 dma_old, dma_new, masterdma = 0, slavedma = 0;
- dma_old = inb(dmabase + 2);
+ if (base == 0 || ide_pci_set_master(dev, d->name) < 0)
+ return -1;
+
+ dma_old = inb(base + 2);
local_irq_save(flags);
@@ -1345,9 +1348,21 @@ static void __devinit init_dma_hpt366(id
if (masterdma & 0x30) dma_new |= 0x20;
if ( slavedma & 0x30) dma_new |= 0x40;
if (dma_new != dma_old)
- outb(dma_new, dmabase + 2);
+ outb(dma_new, base + 2);
local_irq_restore(flags);
+
+ printk(KERN_INFO " %s: BM-DMA at 0x%04lx-0x%04lx\n",
+ hwif->name, base, base + 7);
+
+ hwif->extra_base = base + (hwif->channel ? 8 : 16);
+
+ if (ide_allocate_dma_engine(hwif))
+ return -1;
+
+ ide_setup_dma(hwif, base);
+
+ return 0;
}
static void __devinit hpt374_init(struct pci_dev *dev, struct pci_dev *dev2)
Index: b/drivers/ide/setup-pci.c
===================================================================
--- a/drivers/ide/setup-pci.c
+++ b/drivers/ide/setup-pci.c
@@ -72,16 +72,16 @@ static void ide_pci_clear_simplex(unsign
}
/**
- * ide_get_or_set_dma_base - setup BMIBA
- * @d: IDE port info
+ * ide_pci_dma_base - setup BMIBA
* @hwif: IDE interface
+ * @d: IDE port info
*
* Fetch the DMA Bus-Master-I/O-Base-Address (BMIBA) from PCI space.
* Where a device has a partner that is already in DMA mode we check
* and enforce IDE simplex rules.
*/
-static unsigned long ide_get_or_set_dma_base(const struct ide_port_info *d, ide_hwif_t *hwif)
+unsigned long ide_pci_dma_base(ide_hwif_t *hwif, const struct ide_port_info *d)
{
struct pci_dev *dev = to_pci_dev(hwif->dev);
unsigned long dma_base = 0;
@@ -132,11 +132,12 @@ static unsigned long ide_get_or_set_dma_
out:
return dma_base;
}
+EXPORT_SYMBOL_GPL(ide_pci_dma_base);
/*
* Set up BM-DMA capability (PnP BIOS should have done this)
*/
-static int ide_pci_set_master(struct pci_dev *dev, const char *name)
+int ide_pci_set_master(struct pci_dev *dev, const char *name)
{
u16 pcicmd;
@@ -155,6 +156,7 @@ static int ide_pci_set_master(struct pci
return 0;
}
+EXPORT_SYMBOL_GPL(ide_pci_set_master);
#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
void ide_setup_pci_noise(struct pci_dev *dev, const struct ide_port_info *d)
@@ -359,20 +361,17 @@ static ide_hwif_t *ide_hwif_configure(st
* state
*/
-void ide_hwif_setup_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
+int ide_hwif_setup_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
{
struct pci_dev *dev = to_pci_dev(hwif->dev);
if ((d->host_flags & IDE_HFLAG_NO_AUTODMA) == 0 ||
((dev->class >> 8) == PCI_CLASS_STORAGE_IDE &&
(dev->class & 0x80))) {
- unsigned long base = ide_get_or_set_dma_base(d, hwif);
+ unsigned long base = ide_pci_dma_base(hwif, d);
if (base == 0 || ide_pci_set_master(dev, d->name) < 0)
- goto out_disabled;
-
- if (d->init_dma)
- d->init_dma(hwif, base);
+ return -1;
if (hwif->mmio)
printk(KERN_INFO " %s: MMIO-DMA\n", hwif->name);
@@ -382,15 +381,13 @@ void ide_hwif_setup_dma(ide_hwif_t *hwif
hwif->extra_base = base + (hwif->channel ? 8 : 16);
- if (ide_allocate_dma_engine(hwif) == 0)
- ide_setup_dma(hwif, base);
- }
+ if (ide_allocate_dma_engine(hwif))
+ return -1;
- return;
+ ide_setup_dma(hwif, base);
+ }
-out_disabled:
- printk(KERN_INFO "%s: Bus-Master DMA disabled (BIOS) on %s\n",
- d->name, pci_name(dev));
+ return 0;
}
#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
Index: b/include/linux/ide.h
===================================================================
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1008,10 +1008,15 @@ void ide_pci_setup_ports(struct pci_dev
void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *);
#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
-void ide_hwif_setup_dma(ide_hwif_t *, const struct ide_port_info *);
+int ide_pci_set_master(struct pci_dev *, const char *);
+unsigned long ide_pci_dma_base(ide_hwif_t *, const struct ide_port_info *);
+int ide_hwif_setup_dma(ide_hwif_t *, const struct ide_port_info *);
#else
-static inline void ide_hwif_setup_dma(ide_hwif_t *hwif,
- const struct ide_port_info *d) { }
+static inline int ide_hwif_setup_dma(ide_hwif_t *hwif,
+ const struct ide_port_info *d)
+{
+ return -EINVAL;
+}
#endif
extern void default_hwif_iops(ide_hwif_t *);
@@ -1104,7 +1109,8 @@ struct ide_port_info {
unsigned int (*init_chipset)(struct pci_dev *, const char *);
void (*init_iops)(ide_hwif_t *);
void (*init_hwif)(ide_hwif_t *);
- void (*init_dma)(ide_hwif_t *, unsigned long);
+ int (*init_dma)(ide_hwif_t *,
+ const struct ide_port_info *);
const struct ide_port_ops *port_ops;
--
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