Subject: Re: linux-next: Tree for October 24 - powerpc - build failure with !CONFIG_BLK_DEV_IDEDMA_PMAC

From: Bartlomiej Zolnierkiewicz <[email-masked]>
Date: Sun, 7 Dec 2008 15:27:52 +0100

On Saturday 25 October 2008, Bartlomiej Zolnierkiewicz wrote:
> On Saturday 25 October 2008, Benjamin Herrenschmidt wrote:
> > On Sat, 2008-10-25 at 02:39 +0400, Sergei Shtylyov wrote:
> > > >>    Hm, looks like this configuration was never buildable --
> > > #ifdef's are 
> > > >> missing and wrongly placed. CCing Ben Herrenschmidt...
> > > >>     
> > > >
> > > > What configuration ?
> > > >   
> > > 
> > >    See the subject.
> > 
> > Ah ok. We should probably just remove the option...
> 
> Fine with me.  Anybody want an easy +1 patch-point? :)

Seems like ppc people are either very busy or don't care...  Oh well...

From: Bartlomiej Zolnierkiewicz <[email-masked]>
Subject: [PATCH] ide: build-fix for CONFIG_BLK_DEV_IDEDMA_PMAC=n

IDE pmac host driver build fails with CONFIG_BLK_DEV_IDEDMA_PMAC=n
as reported by Kamalesh:

> drivers/ide/pmac.c: In function 'pmac_ide_set_pio_mode':
> drivers/ide/pmac.c:527: error: implicit declaration of function 'kauai_lookup_timing'
> drivers/ide/pmac.c:527: error: 'shasta_pio_timings' undeclared (first use in this function)
> drivers/ide/pmac.c:527: error: (Each undeclared identifier is reported only once
> drivers/ide/pmac.c:527: error: for each function it appears in.)
> drivers/ide/pmac.c:534: error: 'kauai_pio_timings' undeclared (first use in this function)
> drivers/ide/pmac.c: In function 'pmac_ide_do_resume':
> drivers/ide/pmac.c:914: error: 'IDE_WAKEUP_DELAY' undeclared (first use in this function)
> drivers/ide/pmac.c: At top level:
> drivers/ide/pmac.c:1007: error: 'pmac_ide_init_dma' undeclared here (not in a function)
> drivers/ide/pmac.c: In function 'pmac_ide_setup_device':
> drivers/ide/pmac.c:1107: error: 'IDE_WAKEUP_DELAY' undeclared (first use in this function)
> drivers/ide/pmac.c: In function 'pmac_ide_macio_attach':
> drivers/ide/pmac.c:1209: error: 'pmac_ide_hwif_t' has no member named 'dma_regs'
> drivers/ide/pmac.c:1210: error: 'pmac_ide_hwif_t' has no member named 'dma_regs'
> make[2]: *** [drivers/ide/pmac.o] Error 1

Fix it by removing the superfluous config option.

Reported-by: Kamalesh Babulal <[email-masked]>
Cc: Benjamin Herrenschmidt <[email-masked]>
Cc: Sergei Shtylyov <[email-masked]>
Cc: Stephen Rothwell <[email-masked]>
Signed-off-by: Bartlomiej Zolnierkiewicz <[email-masked]>
---
 drivers/ide/Kconfig |   14 +++-----------
 drivers/ide/pmac.c  |   30 +++---------------------------
 2 files changed, 6 insertions(+), 38 deletions(-)

Index: b/drivers/ide/Kconfig
===================================================================
--- a/drivers/ide/Kconfig
+++ b/drivers/ide/Kconfig
@@ -655,10 +655,12 @@ config BLK_DEV_CELLEB
 
 endif
 
+# TODO: BLK_DEV_IDEDMA_PCI -> BLK_DEV_IDEDMA_SFF
 config BLK_DEV_IDE_PMAC
 	tristate "PowerMac on-board IDE support"
 	depends on PPC_PMAC && IDE=y
 	select IDE_TIMINGS
+	select BLK_DEV_IDEDMA_PCI
 	help
 	  This driver provides support for the on-board IDE controller on
 	  most of the recent Apple Power Macintoshes and PowerBooks.
@@ -675,16 +677,6 @@ config BLK_DEV_IDE_PMAC_ATA100FIRST
 	  CD-ROM on hda. This option changes this to more natural hda for
 	  hard disk and hdc for CD-ROM.
 
-config BLK_DEV_IDEDMA_PMAC
-	bool "PowerMac IDE DMA support"
-	depends on BLK_DEV_IDE_PMAC
-	select BLK_DEV_IDEDMA_PCI
-	help
-	  This option allows the driver for the on-board IDE controller on
-	  Power Macintoshes and PowerBooks to use DMA (direct memory access)
-	  to transfer data to and from memory.  Saying Y is safe and improves
-	  performance.
-
 config BLK_DEV_IDE_AU1XXX
        bool "IDE for AMD Alchemy Au1200"
        depends on SOC_AU1200
@@ -903,7 +895,7 @@ config BLK_DEV_UMC8672
 endif
 
 config BLK_DEV_IDEDMA
-	def_bool BLK_DEV_IDEDMA_SFF || BLK_DEV_IDEDMA_PMAC || \
+	def_bool BLK_DEV_IDEDMA_SFF || \
 		 BLK_DEV_IDEDMA_ICS || BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
 
 endif # IDE
Index: b/drivers/ide/pmac.c
===================================================================
--- a/drivers/ide/pmac.c
+++ b/drivers/ide/pmac.c
@@ -66,7 +66,6 @@ typedef struct pmac_ide_hwif {
 	struct macio_dev		*mdev;
 	u32				timings[4];
 	volatile u32 __iomem *		*kauai_fcr;
-#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
 	/* Those fields are duplicating what is in hwif. We currently
 	 * can't use the hwif ones because of some assumptions that are
 	 * beeing done by the generic code about the kind of dma controller
@@ -74,8 +73,6 @@ typedef struct pmac_ide_hwif {
 	 */
 	volatile struct dbdma_regs __iomem *	dma_regs;
 	struct dbdma_cmd*		dma_table_cpu;
-#endif
-	
 } pmac_ide_hwif_t;
 
 enum {
@@ -222,8 +219,6 @@ static const char* model_name[] = {
 #define KAUAI_FCR_UATA_RESET_N		0x00000002
 #define KAUAI_FCR_UATA_ENABLE		0x00000001
 
-#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
-
 /* Rounded Multiword DMA timings
  * 
  * I gave up finding a generic formula for all controller
@@ -413,8 +408,6 @@ static int pmac_ide_build_dmatable(ide_d
 static void pmac_ide_selectproc(ide_drive_t *drive);
 static void pmac_ide_kauai_selectproc(ide_drive_t *drive);
 
-#endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
-
 #define PMAC_IDE_REG(x) \
 	((void __iomem *)((drive)->hwif->io_ports.data_addr + (x)))
 
@@ -584,8 +577,6 @@ pmac_ide_set_pio_mode(ide_drive_t *drive
 	pmac_ide_do_update_timings(drive);
 }
 
-#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
-
 /*
  * Calculate KeyLargo ATA/66 UDMA timings
  */
@@ -786,7 +777,6 @@ set_timings_mdma(ide_drive_t *drive, int
 		drive->name, speed & 0xf,  *timings);
 #endif	
 }
-#endif /* #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC */
 
 static void pmac_ide_set_dma_mode(ide_drive_t *drive, const u8 speed)
 {
@@ -804,7 +794,6 @@ static void pmac_ide_set_dma_mode(ide_dr
 	tl[0] = *timings;
 	tl[1] = *timings2;
 
-#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
 	if (speed >= XFER_UDMA_0) {
 		if (pmif->kind == controller_kl_ata4)
 			ret = set_timings_udma_ata4(&tl[0], speed);
@@ -817,7 +806,7 @@ static void pmac_ide_set_dma_mode(ide_dr
 			ret = -1;
 	} else
 		set_timings_mdma(drive, pmif->kind, &tl[0], &tl[1], speed);
-#endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
+
 	if (ret)
 		return;
 
@@ -1008,9 +997,7 @@ static const struct ide_port_info pmac_p
 	.chipset		= ide_pmac,
 	.tp_ops			= &pmac_tp_ops,
 	.port_ops		= &pmac_ide_port_ops,
-#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
 	.dma_ops		= &pmac_dma_ops,
-#endif
 	.host_flags		= IDE_HFLAG_SET_PIO_MODE_KEEP_DMA |
 				  IDE_HFLAG_POST_SET_MODE |
 				  IDE_HFLAG_MMIO |
@@ -1182,7 +1169,7 @@ pmac_ide_macio_attach(struct macio_dev *
 	pmif->regbase = regbase;
 	pmif->irq = irq;
 	pmif->kauai_fcr = NULL;
-#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
+
 	if (macio_resource_count(mdev) >= 2) {
 		if (macio_request_resource(mdev, 1, "ide-pmac (dma)"))
 			printk(KERN_WARNING "ide-pmac: can't request DMA "
@@ -1192,7 +1179,7 @@ pmac_ide_macio_attach(struct macio_dev *
 			pmif->dma_regs = ioremap(macio_resource_start(mdev, 1), 0x1000);
 	} else
 		pmif->dma_regs = NULL;
-#endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
+
 	dev_set_drvdata(&mdev->ofdev.dev, pmif);
 
 	memset(&hw, 0, sizeof(hw));
@@ -1300,9 +1287,7 @@ pmac_ide_pci_attach(struct pci_dev *pdev
 
 	base = ioremap(rbase, rlen);
 	pmif->regbase = (unsigned long) base + 0x2000;
-#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
 	pmif->dma_regs = base + 0x1000;
-#endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
 	pmif->kauai_fcr = base;
 	pmif->irq = pdev->irq;
 
@@ -1434,8 +1419,6 @@ out:
 	return error;
 }
 
-#ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
-
 /*
  * pmac_ide_build_dmatable builds the DBDMA command list
  * for a transfer and sets the DBDMA channel to point to it.
@@ -1723,13 +1706,6 @@ static int __devinit pmac_ide_init_dma(i
 
 	return 0;
 }
-#else
-static int __devinit pmac_ide_init_dma(ide_hwif_t *hwif,
-				       const struct ide_port_info *d)
-{
-	return -EOPNOTSUPP;
-}
-#endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
 
 module_init(pmac_ide_probe);