ALSA update broke Sparc

ALSA update broke Sparc

[David S. Miller]

Each platform uses a different number of arguments for
io_remap_page_range(), so you can't just blindly call it
from generic code.

However, sound/core/pcm_native.c is doing exactly that.

The reason each platform takes a different number of
args is that the "unsigned long" base address argument
is only 32-bits on 32-bit platforms yet on some of
such platforms I/O and physical memory addresses
are larger than 32-bits.

Sparc and Sparc64 use a "space" argument to provide this
upper 32-bits of information.

Also, what this PCM mmap'ing code is trying to do
is take I/O addresses and remap them into the process
address space.  pci_resource_start() values are not necessarily
suitable for passing around as physical addresses.  These
things are well defined when used with ioremap() but
that is it.  I don't know if we've defined it such that
passing these into io_remap_page_range() can be expected
to work.

In fact, because of the sparc 32-bit issue, I know it won't
work.  You'll need to have the full resource structure
available, as that's where we hide the upper 32-bits of
the physical address on sparc32.

This is really non-portable, what the PCM code is doing.
I would suggest, for the time being, to pass resources
around and then have an arch-defined macro which takes
the resource pointer and makes the appropriate io_remap_page_range()
call.

Can I make a small formal request of the ALSA folks?  Can you
at least setup a cross-compiler to make sure your ALSA merges
don't explode on sparc64?  As it stands, 1 out of every 2 ALSA
merges breaks the build on that platform.

Re: ALSA update broke Sparc

[Russell King]

On Fri, Aug 27, 2004 at 06:36:46PM -0700, David S. Miller wrote:
> Can I make a small formal request of the ALSA folks?  Can you
> at least setup a cross-compiler to make sure your ALSA merges
> don't explode on sparc64?  As it stands, 1 out of every 2 ALSA
> merges breaks the build on that platform.

This is only one such small case.  There's also the case of mmaping
DMA buffers into userspace...

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 PCMCIA      - http://pcmcia.arm.linux.org.uk/
                 2.6 Serial core

Re: ALSA update broke Sparc

[Takashi Iwai]

At Fri, 27 Aug 2004 18:36:46 -0700,
David S. Miller wrote:
> 
> 
> Each platform uses a different number of arguments for
> io_remap_page_range(), so you can't just blindly call it
> from generic code.
> 
> However, sound/core/pcm_native.c is doing exactly that.

Argh, sorry about that.  My ignorance.


> The reason each platform takes a different number of
> args is that the "unsigned long" base address argument
> is only 32-bits on 32-bit platforms yet on some of
> such platforms I/O and physical memory addresses
> are larger than 32-bits.
> 
> Sparc and Sparc64 use a "space" argument to provide this
> upper 32-bits of information.

I'll fix this anyway - but, doesn't it make sense to change the
argument type to more reasonable one for 64bit architectures (as wli 
posted)?


> Also, what this PCM mmap'ing code is trying to do
> is take I/O addresses and remap them into the process
> address space.  pci_resource_start() values are not necessarily
> suitable for passing around as physical addresses.  These
> things are well defined when used with ioremap() but
> that is it.  I don't know if we've defined it such that
> passing these into io_remap_page_range() can be expected
> to work.
> 
> In fact, because of the sparc 32-bit issue, I know it won't
> work.  You'll need to have the full resource structure
> available, as that's where we hide the upper 32-bits of
> the physical address on sparc32.
> 
> This is really non-portable, what the PCM code is doing.
> I would suggest, for the time being, to pass resources
> around and then have an arch-defined macro which takes
> the resource pointer and makes the appropriate io_remap_page_range()
> call.

Calling io_remap_page_range() in the PCM layer is provided only for
certain PCI drivers such as nm256, so disabling this isn't a problem
in general.  Indeed, this feature should be disabled for architectures
like sparc.

Or even better, as Russell King suggested before, we can hide
arch-specific things by creating a generic mmap method for struct
device.  I see that sparc already has pci_mmap_page_range() for a
similar purpose.


> Can I make a small formal request of the ALSA folks?  Can you
> at least setup a cross-compiler to make sure your ALSA merges
> don't explode on sparc64?  As it stands, 1 out of every 2 ALSA
> merges breaks the build on that platform.

I'll try to set up.


--
Takashi Iwai <tiwai@suse.de>		ALSA Developer - www.alsa-project.org

Re: ALSA update broke Sparc

[Takashi Iwai]

At Mon, 30 Aug 2004 12:26:30 +0200,
I wrote:
> 
> > Can I make a small formal request of the ALSA folks?  Can you
> > at least setup a cross-compiler to make sure your ALSA merges
> > don't explode on sparc64?  As it stands, 1 out of every 2 ALSA
> > merges breaks the build on that platform.
> 
> I'll try to set up.

Although I still couldn't set up the sparc cross-compile environment,
I fixed/updated the ALSA pcm layer.

David, could you try the attached patch?  With this, the problematic
part will be disabled on sparc (it won't work on every architecture,
anyway).


thanks,

Takashi

--- linux/sound/core/pcm.c	3 Aug 2004 16:44:01 -0000	1.43
+++ linux/sound/core/pcm.c	31 Aug 2004 18:35:21 -0000
@@ -1050,6 +1050,9 @@
 EXPORT_SYMBOL(snd_pcm_playback_poll);
 EXPORT_SYMBOL(snd_pcm_capture_poll);
 EXPORT_SYMBOL(snd_pcm_mmap_data);
+#if SNDRV_PCM_INFO_MMAP_IOMEM
+EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
+#endif
  /* pcm_misc.c */
 EXPORT_SYMBOL(snd_pcm_format_signed);
 EXPORT_SYMBOL(snd_pcm_format_unsigned);
--- linux/sound/core/pcm_native.c	16 Aug 2004 10:02:10 -0000	1.81
+++ linux/sound/core/pcm_native.c	31 Aug 2004 18:35:27 -0000
@@ -2907,6 +2907,18 @@
 	return mask;
 }
 
+/*
+ * mmap support
+ */
+
+/*
+ * Only on coherent architectures, we can mmap the status and the control records
+ * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
+ */
+#if defined(__i386__) || defined(__x86_64__) || defined(__powerpc__) || defined(__alpha__)
+/*
+ * mmap status record
+ */
 static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area, unsigned long address, int *type)
 {
 	snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
@@ -2929,8 +2941,8 @@
 	.nopage =	snd_pcm_mmap_status_nopage,
 };
 
-int snd_pcm_mmap_status(snd_pcm_substream_t *substream, struct file *file,
-			struct vm_area_struct *area)
+static int snd_pcm_mmap_status(snd_pcm_substream_t *substream, struct file *file,
+			       struct vm_area_struct *area)
 {
 	snd_pcm_runtime_t *runtime;
 	long size;
@@ -2947,6 +2959,9 @@
 	return 0;
 }
 
+/*
+ * mmap control record
+ */
 static struct page * snd_pcm_mmap_control_nopage(struct vm_area_struct *area, unsigned long address, int *type)
 {
 	snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
@@ -2986,20 +3001,26 @@
 	area->vm_flags |= VM_RESERVED;
 	return 0;
 }
-
-static void snd_pcm_mmap_data_open(struct vm_area_struct *area)
+#else /* ! coherent mmap */
+/*
+ * don't support mmap for status and control records.
+ */
+static int snd_pcm_mmap_status(snd_pcm_substream_t *substream, struct file *file,
+			       struct vm_area_struct *area)
 {
-	snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
-	atomic_inc(&substream->runtime->mmap_count);
+	return -ENXIO;
 }
-
-static void snd_pcm_mmap_data_close(struct vm_area_struct *area)
+static int snd_pcm_mmap_control(snd_pcm_substream_t *substream, struct file *file,
+				struct vm_area_struct *area)
 {
-	snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
-	atomic_dec(&substream->runtime->mmap_count);
+	return -ENXIO;
 }
+#endif /* coherent mmap */
 
-static struct page * snd_pcm_mmap_data_nopage(struct vm_area_struct *area, unsigned long address, int *type)
+/*
+ * nopage callback for mmapping a RAM page
+ */
+static struct page *snd_pcm_mmap_data_nopage(struct vm_area_struct *area, unsigned long address, int *type)
 {
 	snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
 	snd_pcm_runtime_t *runtime;
@@ -3039,12 +3060,52 @@
 	.nopage =	snd_pcm_mmap_data_nopage,
 };
 
+/*
+ * mmap the DMA buffer on RAM
+ */
+static int snd_pcm_default_mmap(snd_pcm_substream_t *substream, struct vm_area_struct *area)
+{
+	area->vm_ops = &snd_pcm_vm_ops_data;
+	area->vm_private_data = substream;
+	area->vm_flags |= VM_RESERVED;
+	atomic_inc(&substream->runtime->mmap_count);
+	return 0;
+}
+
+/*
+ * mmap the DMA buffer on I/O memory area
+ */
+#if SNDRV_PCM_INFO_MMAP_IOMEM
 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
 {
 	.open =		snd_pcm_mmap_data_open,
 	.close =	snd_pcm_mmap_data_close,
 };
 
+int snd_pcm_lib_mmap_iomem(snd_pcm_substream_t *substream, struct vm_area_struct *area)
+{
+	long size;
+	unsigned long offset;
+
+#ifdef pgprot_noncached
+	area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
+#endif
+	area->vm_ops = &snd_pcm_vm_ops_data_mmio;
+	area->vm_flags |= VM_IO;
+	size = area->vm_end - area->vm_start;
+	offset = area->vm_pgoff << PAGE_SHIFT;
+	if (io_remap_page_range(area, area->vm_start,
+				substream->runtime->dma_addr + offset,
+				size, area->vm_page_prot))
+		return -EAGAIN;
+	atomic_inc(&substream->runtime->mmap_count);
+	return 0;
+}
+#endif /* SNDRV_PCM_INFO_MMAP */
+
+/*
+ * mmap DMA buffer
+ */
 int snd_pcm_mmap_data(snd_pcm_substream_t *substream, struct file *file,
 		      struct vm_area_struct *area)
 {
@@ -3077,19 +3138,10 @@
 	if (offset > dma_bytes - size)
 		return -EINVAL;
 
-	area->vm_ops = &snd_pcm_vm_ops_data;
-	area->vm_private_data = substream;
-	area->vm_flags |= VM_RESERVED;
-	if (runtime->hw.info & SNDRV_PCM_INFO_MMAP_IOMEM) {
-		area->vm_ops = &snd_pcm_vm_ops_data_mmio;
-		area->vm_flags |= VM_IO;
-		if (io_remap_page_range(area, area->vm_start,
-					runtime->dma_addr + offset,
-					size, area->vm_page_prot))
-			return -EAGAIN;
-	}
-	atomic_inc(&runtime->mmap_count);
-	return 0;
+	if (substream->ops->mmap)
+		return substream->ops->mmap(substream, area);
+	else
+		return snd_pcm_default_mmap(substream, area);
 }
 
 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
--- linux/include/sound/asound.h	3 Aug 2004 16:45:38 -0000	1.36
+++ linux/include/sound/asound.h	31 Aug 2004 18:31:28 -0000
@@ -275,7 +275,6 @@
 #define SNDRV_PCM_INFO_HALF_DUPLEX	0x00100000	/* only half duplex */
 #define SNDRV_PCM_INFO_JOINT_DUPLEX	0x00200000	/* playback and capture stream are somewhat correlated */
 #define SNDRV_PCM_INFO_SYNC_START	0x00400000	/* pcm support some kind of sync go */
-#define SNDRV_PCM_INFO_MMAP_IOMEM	0x01000000	/* mmap on IO memory */
 
 enum sndrv_pcm_state {
 	SNDRV_PCM_STATE_OPEN = 0,	/* stream is open */
--- linux/include/sound/pcm.h	30 Jul 2004 12:44:58 -0000	1.47
+++ linux/include/sound/pcm.h	31 Aug 2004 18:35:31 -0000
@@ -97,6 +97,7 @@
 	int (*silence)(snd_pcm_substream_t *substream, int channel, 
 		       snd_pcm_uframes_t pos, snd_pcm_uframes_t count);
 	struct page *(*page)(snd_pcm_substream_t *substream, unsigned long offset);
+	int (*mmap)(snd_pcm_substream_t *substream, struct vm_area_struct *vma);
 	int (*ack)(snd_pcm_substream_t *substream);
 } snd_pcm_ops_t;
 
@@ -938,6 +939,28 @@
 #define snd_pcm_sgbuf_get_addr(sgbuf,ofs) snd_sgbuf_get_addr(sgbuf,ofs)
 struct page *snd_pcm_sgbuf_ops_page(snd_pcm_substream_t *substream, unsigned long offset);
 
+/* handle mmap counter - PCM mmap callback should handle this counter properly */
+static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
+{
+	snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
+	atomic_inc(&substream->runtime->mmap_count);
+}
+
+static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
+{
+	snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
+	atomic_dec(&substream->runtime->mmap_count);
+}
+
+/* mmap for io-memory area */
+#if defined(__i386__) || defined(__x86_64__) || defined(__powerpc__) || defined(__alpha__)
+#define SNDRV_PCM_INFO_MMAP_IOMEM	SNDRV_PCM_INFO_MMAP
+int snd_pcm_lib_mmap_iomem(snd_pcm_substream_t *substream, struct vm_area_struct *area);
+#else
+#define SNDRV_PCM_INFO_MMAP	0
+#define snd_pcm_lib_mmap_iomem	NULL
+#endif
+
 static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
 {
 	*max = dma < 4 ? 64 * 1024 : 128 * 1024;
--- linux/sound/pci/rme32.c	27 Jul 2004 12:40:29 -0000	1.47
+++ linux/sound/pci/rme32.c	31 Aug 2004 18:31:28 -0000
@@ -331,9 +331,8 @@
  * SPDIF I/O capabilites (half-duplex mode)
  */
 static snd_pcm_hardware_t snd_rme32_spdif_info = {
-	.info =		(SNDRV_PCM_INFO_MMAP |
+	.info =		(SNDRV_PCM_INFO_MMAP_IOMEM |
 			 SNDRV_PCM_INFO_MMAP_VALID |
-			 SNDRV_PCM_INFO_MMAP_IOMEM |
 			 SNDRV_PCM_INFO_INTERLEAVED | 
 			 SNDRV_PCM_INFO_PAUSE |
 			 SNDRV_PCM_INFO_SYNC_START),
@@ -359,9 +358,8 @@
  */
 static snd_pcm_hardware_t snd_rme32_adat_info =
 {
-	.info =		     (SNDRV_PCM_INFO_MMAP |
+	.info =		     (SNDRV_PCM_INFO_MMAP_IOMEM |
 			      SNDRV_PCM_INFO_MMAP_VALID |
-			      SNDRV_PCM_INFO_MMAP_IOMEM |
 			      SNDRV_PCM_INFO_INTERLEAVED |
 			      SNDRV_PCM_INFO_PAUSE |
 			      SNDRV_PCM_INFO_SYNC_START),
@@ -1246,6 +1244,7 @@
 	.pointer =	snd_rme32_playback_pointer,
 	.copy =		snd_rme32_playback_copy,
 	.silence =	snd_rme32_playback_silence,
+	.mmap =		snd_pcm_lib_mmap_iomem,
 };
 
 static snd_pcm_ops_t snd_rme32_capture_spdif_ops = {
@@ -1258,6 +1257,7 @@
 	.trigger =	snd_rme32_pcm_trigger,
 	.pointer =	snd_rme32_capture_pointer,
 	.copy =		snd_rme32_capture_copy,
+	.mmap =		snd_pcm_lib_mmap_iomem,
 };
 
 static snd_pcm_ops_t snd_rme32_playback_adat_ops = {
@@ -1270,6 +1270,7 @@
 	.pointer =	snd_rme32_playback_pointer,
 	.copy =		snd_rme32_playback_copy,
 	.silence =	snd_rme32_playback_silence,
+	.mmap =		snd_pcm_lib_mmap_iomem,
 };
 
 static snd_pcm_ops_t snd_rme32_capture_adat_ops = {
@@ -1281,6 +1282,7 @@
 	.trigger =	snd_rme32_pcm_trigger,
 	.pointer =	snd_rme32_capture_pointer,
 	.copy =		snd_rme32_capture_copy,
+	.mmap =		snd_pcm_lib_mmap_iomem,
 };
 
 /* for fullduplex mode */
--- linux/sound/pci/rme96.c	27 Jul 2004 11:20:09 -0000	1.41
+++ linux/sound/pci/rme96.c	31 Aug 2004 18:31:28 -0000
@@ -383,9 +383,8 @@
  */
 static snd_pcm_hardware_t snd_rme96_playback_spdif_info =
 {
-	.info =		     (SNDRV_PCM_INFO_MMAP |
+	.info =		     (SNDRV_PCM_INFO_MMAP_IOMEM |
 			      SNDRV_PCM_INFO_MMAP_VALID |
-			      SNDRV_PCM_INFO_MMAP_IOMEM |
 			      SNDRV_PCM_INFO_INTERLEAVED |
 			      SNDRV_PCM_INFO_PAUSE),
 	.formats =	     (SNDRV_PCM_FMTBIT_S16_LE |
@@ -413,9 +412,8 @@
  */
 static snd_pcm_hardware_t snd_rme96_capture_spdif_info =
 {
-	.info =		     (SNDRV_PCM_INFO_MMAP |
+	.info =		     (SNDRV_PCM_INFO_MMAP_IOMEM |
 			      SNDRV_PCM_INFO_MMAP_VALID |
-			      SNDRV_PCM_INFO_MMAP_IOMEM |
 			      SNDRV_PCM_INFO_INTERLEAVED |
 			      SNDRV_PCM_INFO_PAUSE),
 	.formats =	     (SNDRV_PCM_FMTBIT_S16_LE |
@@ -443,9 +441,8 @@
  */
 static snd_pcm_hardware_t snd_rme96_playback_adat_info =
 {
-	.info =		     (SNDRV_PCM_INFO_MMAP |
+	.info =		     (SNDRV_PCM_INFO_MMAP_IOMEM |
 			      SNDRV_PCM_INFO_MMAP_VALID |
-			      SNDRV_PCM_INFO_MMAP_IOMEM |
 			      SNDRV_PCM_INFO_INTERLEAVED |
 			      SNDRV_PCM_INFO_PAUSE),
 	.formats =	     (SNDRV_PCM_FMTBIT_S16_LE |
@@ -469,9 +466,8 @@
  */
 static snd_pcm_hardware_t snd_rme96_capture_adat_info =
 {
-	.info =		     (SNDRV_PCM_INFO_MMAP |
+	.info =		     (SNDRV_PCM_INFO_MMAP_IOMEM |
 			      SNDRV_PCM_INFO_MMAP_VALID |
-			      SNDRV_PCM_INFO_MMAP_IOMEM |
 			      SNDRV_PCM_INFO_INTERLEAVED |
 			      SNDRV_PCM_INFO_PAUSE),
 	.formats =	     (SNDRV_PCM_FMTBIT_S16_LE |
@@ -1494,6 +1490,7 @@
 	.pointer =	snd_rme96_playback_pointer,
 	.copy =		snd_rme96_playback_copy,
 	.silence =	snd_rme96_playback_silence,
+	.mmap =		snd_pcm_lib_mmap_iomem,
 };
 
 static snd_pcm_ops_t snd_rme96_capture_spdif_ops = {
@@ -1505,6 +1502,7 @@
 	.trigger =	snd_rme96_capture_trigger,
 	.pointer =	snd_rme96_capture_pointer,
 	.copy =		snd_rme96_capture_copy,
+	.mmap =		snd_pcm_lib_mmap_iomem,
 };
 
 static snd_pcm_ops_t snd_rme96_playback_adat_ops = {
@@ -1517,6 +1515,7 @@
 	.pointer =	snd_rme96_playback_pointer,
 	.copy =		snd_rme96_playback_copy,
 	.silence =	snd_rme96_playback_silence,
+	.mmap =		snd_pcm_lib_mmap_iomem,
 };
 
 static snd_pcm_ops_t snd_rme96_capture_adat_ops = {
@@ -1528,6 +1527,7 @@
 	.trigger =	snd_rme96_capture_trigger,
 	.pointer =	snd_rme96_capture_pointer,
 	.copy =		snd_rme96_capture_copy,
+	.mmap =		snd_pcm_lib_mmap_iomem,
 };
 
 static void
--- linux/sound/pci/nm256/nm256.c	3 Aug 2004 15:03:54 -0000	1.52
+++ linux/sound/pci/nm256/nm256.c	31 Aug 2004 18:31:28 -0000
@@ -742,8 +742,7 @@
  */
 static snd_pcm_hardware_t snd_nm256_playback =
 {
-	.info =			SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID|
-				SNDRV_PCM_INFO_MMAP_IOMEM|
+	.info =			SNDRV_PCM_INFO_MMAP_IOMEM |SNDRV_PCM_INFO_MMAP_VALID |
 				SNDRV_PCM_INFO_INTERLEAVED |
 				/*SNDRV_PCM_INFO_PAUSE |*/
 				SNDRV_PCM_INFO_RESUME,
@@ -762,8 +761,7 @@
 
 static snd_pcm_hardware_t snd_nm256_capture =
 {
-	.info =			SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID|
-				SNDRV_PCM_INFO_MMAP_IOMEM|
+	.info =			SNDRV_PCM_INFO_MMAP_IOMEM | SNDRV_PCM_INFO_MMAP_VALID |
 				SNDRV_PCM_INFO_INTERLEAVED |
 				/*SNDRV_PCM_INFO_PAUSE |*/
 				SNDRV_PCM_INFO_RESUME,
@@ -864,6 +862,7 @@
 	.copy =		snd_nm256_playback_copy,
 	.silence =	snd_nm256_playback_silence,
 #endif
+	.mmap =		snd_pcm_lib_mmap_iomem,
 };
 
 static snd_pcm_ops_t snd_nm256_capture_ops = {
@@ -877,6 +876,7 @@
 #ifndef __i386__
 	.copy =		snd_nm256_capture_copy,
 #endif
+	.mmap =		snd_pcm_lib_mmap_iomem,
 };
 
 static int __devinit

Re: ALSA update broke Sparc

[David S. Miller]

On Tue, 31 Aug 2004 21:07:19 +0200
Takashi Iwai <tiwai@suse.de> wrote:

> Although I still couldn't set up the sparc cross-compile environment,

There is a good one available somewhere, ask Andrew Morton for
pointers, he uses it.

> I fixed/updated the ALSA pcm layer.
> 
> David, could you try the attached patch?  With this, the problematic
> part will be disabled on sparc (it won't work on every architecture,
> anyway).

Generates lots of warnings like this:

  CC [M]  drivers/i2c/chips/smsc47m1.o
In file included from sound/pci/au88x0/au88x0.h:26,
                 from sound/pci/au88x0/au8820.c:2:
include/sound/pcm.h:960:1: warning: "SNDRV_PCM_INFO_MMAP" redefined
In file included from include/sound/pcm.h:26,
                 from sound/pci/au88x0/au88x0.h:26,
                 from sound/pci/au88x0/au8820.c:2:
include/sound/asound.h:264:1: warning: this is the location of the previous definition

Re: ALSA update broke Sparc

[David S. Miller]

Also, please do not use __i386__ et al. ifdefs, use
things like CONFIG_I386 and CONFIG_SPARC which are
meant for this purpose.

Re: ALSA update broke Sparc

[Andrew Morton]

Takashi Iwai <tiwai@suse.de> wrote:
>
> Although I still couldn't set up the sparc cross-compile environment,

The tarballs at http://developer.osdl.org/dev/plm/cross_compile/ work nicely.

Re: ALSA update broke Sparc

[Takashi Iwai]

At Tue, 31 Aug 2004 13:56:51 -0700,
David S. Miller wrote:
> 
> On Tue, 31 Aug 2004 21:07:19 +0200
> Takashi Iwai <tiwai@suse.de> wrote:
> 
> > I fixed/updated the ALSA pcm layer.
> > 
> > David, could you try the attached patch?  With this, the problematic
> > part will be disabled on sparc (it won't work on every architecture,
> > anyway).
> 
> Generates lots of warnings like this:
> 
>   CC [M]  drivers/i2c/chips/smsc47m1.o
> In file included from sound/pci/au88x0/au88x0.h:26,
>                  from sound/pci/au88x0/au8820.c:2:
> include/sound/pcm.h:960:1: warning: "SNDRV_PCM_INFO_MMAP" redefined
> In file included from include/sound/pcm.h:26,
>                  from sound/pci/au88x0/au88x0.h:26,
>                  from sound/pci/au88x0/au8820.c:2:
> include/sound/asound.h:264:1: warning: this is the location of the previous definition

Sorry, a silly typo.

Takashi


--- linux/include/sound/pcm.h-dist	2004-09-01 10:10:16.038394555 +0200
+++ linux/include/sound/pcm.h	2004-09-01 10:10:21.377184781 +0200
@@ -957,7 +957,7 @@ static inline void snd_pcm_mmap_data_clo
 #define SNDRV_PCM_INFO_MMAP_IOMEM	SNDRV_PCM_INFO_MMAP
 int snd_pcm_lib_mmap_iomem(snd_pcm_substream_t *substream, struct vm_area_struct *area);
 #else
-#define SNDRV_PCM_INFO_MMAP	0
+#define SNDRV_PCM_INFO_MMAP_IOMEM	0
 #define snd_pcm_lib_mmap_iomem	NULL
 #endif
 

Re: ALSA update broke Sparc

[Takashi Iwai]

At Tue, 31 Aug 2004 13:58:05 -0700,
David S. Miller wrote:
> 
> 
> Also, please do not use __i386__ et al. ifdefs, use
> things like CONFIG_I386 and CONFIG_SPARC which are
> meant for this purpose.

Do we have CONFIG_I386?
At least, CONFIG_X86 is defined also for x86-64, so it's not unique.
(For my patch it's ok since both are given, though.)


Takashi

Re: ALSA update broke Sparc

[Takashi Iwai]

At Tue, 31 Aug 2004 15:20:49 -0700,
Andrew Morton wrote:
> 
> Takashi Iwai <tiwai@suse.de> wrote:
> >
> > Although I still couldn't set up the sparc cross-compile environment,
> 
> The tarballs at http://developer.osdl.org/dev/plm/cross_compile/ work nicely.

Thanks!  I'll try them.
(But maybe I'll have no time in these two weeks for conferences...)


Takashi