Benjamin Herrenschmidt wrote:
> On Wed, 2007-05-30 at 12:13 +0200, Christoph Hellwig wrote:
>>
>> For any sane hypervisor or hardware the copy should be worth
>> than that. Then again a sane hardware or hypervisor would support
>> SG requests..
>
> Agreed... Sony should fix that, it's a bit ridi
On Wed, 2007-05-30 at 12:13 +0200, Christoph Hellwig wrote:
>
> For any sane hypervisor or hardware the copy should be worth
> than that. Then again a sane hardware or hypervisor would support
> SG requests..
Agreed... Sony should fix that, it's a bit ridiculous.
Ben.
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On Tue, May 29, 2007 at 01:11:41PM +0200, Geert Uytterhoeven wrote:
> > This looks very inefficient. Just set sg_tablesize of your driver
> > to 1 to avoid getting mutiple segments.
>
> The disadvantage of setting sg_tablesize = 1 is that the driver will get small
> requests (PAGE_SIZE) most of t
On Tue, May 29, 2007 at 06:21:36PM +0200, Geert Uytterhoeven wrote:
> On Tue, 29 May 2007, Christoph Hellwig wrote:
> > > +/*
> > > + * copy data from device into scatter/gather buffer
> > > + */
> > > +static int fill_from_dev_buffer(struct scsi_cmnd *cmd, const void *buf,
> > > +
On Tue, 29 May 2007, Christoph Hellwig wrote:
> > +/*
> > + * copy data from device into scatter/gather buffer
> > + */
> > +static int fill_from_dev_buffer(struct scsi_cmnd *cmd, const void *buf,
> > + int buflen)
> > +{
> > + int k, req_len, act_len, len, active;
> > +
On Tue, 2007-05-29 at 13:11 +0200, Geert Uytterhoeven wrote:
> > This looks very inefficient. Just set sg_tablesize of your driver
> > to 1 to avoid getting mutiple segments.
>
> The disadvantage of setting sg_tablesize = 1 is that the driver will
> get small
> requests (PAGE_SIZE) most of the ti
On Tue, 29 May 2007, Christoph Hellwig wrote:
> [Note that all scsi lldds should go to linux-scsi]
I'll Cc linux-scsi next time.
> > + sgpnt = cmd->request_buffer;
> > + active = 1;
> > + for (k = 0, req_len = 0, act_len = 0; k < cmd->use_sg; ++k, ++sgpnt) {
> > + if (active) {
>
On Fri, May 25, 2007 at 11:04:29PM +0200, Arnd Bergmann wrote:
> On Friday 25 May 2007, Geert Uytterhoeven wrote:
> >
> > > What is the problem? Is there infrastructure missing in the
> > > CD-ROM layer?
> >
> > As the CD/DVD/BD part just accepts SCSI/ATAPI commands (except for plain
> > read/wri
[Note that all scsi lldds should go to linux-scsi]
> +config PS3_ROM
> + tristate "PS3 ROM Storage Driver"
> + depends on PPC_PS3 && BLK_DEV_SR
> + select PS3_STORAGE
> + default y
please don't put any default y statements in.
> +#define DEVICE_NAME "ps3rom"
> +
On Sun, May 27, 2007 at 08:18:43AM +1000, Benjamin Herrenschmidt wrote:
> > > > linux/highmem.h is not included to get the kmap_* prototypes.
> > >
> > > Beside, I don't see the point of using kmap on ppc64...
> >
> > So what should I use instead?
>
> you don't need to map ... the linear mapping
On Sat, 2007-05-26 at 10:52 +0200, Geert Uytterhoeven wrote:
> On Sat, 26 May 2007, Benjamin Herrenschmidt wrote:
> > On Fri, 2007-05-25 at 13:24 +0200, Olaf Hering wrote:
> > > On Fri, May 25, [EMAIL PROTECTED] wrote:
> > >
> > > > +++ b/drivers/scsi/ps3rom.c
> > >
> > > > +
On Sat, 26 May 2007, Benjamin Herrenschmidt wrote:
> On Fri, 2007-05-25 at 13:24 +0200, Olaf Hering wrote:
> > On Fri, May 25, [EMAIL PROTECTED] wrote:
> >
> > > +++ b/drivers/scsi/ps3rom.c
> >
> > > + kaddr = kmap_atomic(sgpnt->page, KM_USER0);
> >
> > linux/highmem.h is not inc
On Fri, 2007-05-25 at 13:24 +0200, Olaf Hering wrote:
> On Fri, May 25, [EMAIL PROTECTED] wrote:
>
> > +++ b/drivers/scsi/ps3rom.c
>
> > + kaddr = kmap_atomic(sgpnt->page, KM_USER0);
>
> linux/highmem.h is not included to get the kmap_* prototypes.
Beside, I don't see the poin
On Friday 25 May 2007, Geert Uytterhoeven wrote:
>
> > What is the problem? Is there infrastructure missing in the
> > CD-ROM layer?
>
> As the CD/DVD/BD part just accepts SCSI/ATAPI commands (except for plain
> read/write), I was suggested to keep it as a SCSI driver.
Ok, so I guess the tradeof
On Fri, 25 May 2007, Arnd Bergmann wrote:
> On Friday 25 May 2007, [EMAIL PROTECTED] wrote:
> > Add a CD/DVD/BD Storage Driver for the PS3:
> > - Implemented as a SCSI device driver
>
> I assume you tried implementing it as a block device driver,
> like you PS3 disk driver does, and failed for s
On Friday 25 May 2007, [EMAIL PROTECTED] wrote:
> Add a CD/DVD/BD Storage Driver for the PS3:
> - Implemented as a SCSI device driver
I assume you tried implementing it as a block device driver,
like you PS3 disk driver does, and failed for some reason.
What is the problem? Is there infrastruct
On Fri, May 25, [EMAIL PROTECTED] wrote:
> +++ b/drivers/scsi/ps3rom.c
> + kaddr = kmap_atomic(sgpnt->page, KM_USER0);
linux/highmem.h is not included to get the kmap_* prototypes.
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Add a CD/DVD/BD Storage Driver for the PS3:
- Implemented as a SCSI device driver
- Uses software scatter-gather with a 64 KiB bounce buffer as the hypervisor
doesn't support scatter-gather
Signed-off-by: Geert Uytterhoeven <[EMAIL PROTECTED]>
---
arch/powerpc/platforms/ps3/Kconfig | 11
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