linux-toradex.git/arch/powerpc/sysdev, branch v2.6.19.2

[POWERPC] qe_lib: qe_issue_cmd writes wrong value to CECDR

2006-11-01T03:52:48+00:00

Changed qe_issue_cmd() to write cmd_input to the CECDR unmodified.  It
was treating cmd_input as a virtual address and tried to convert it to
a physical address.

Signed-off-by: Timur Tabi 
Signed-off-by: Paul Mackerras

[POWERPC] Use 4kB iommu pages even on 64kB-page systems

2006-11-01T03:52:48+00:00

The 10Gigabit ethernet device drivers appear to be able to chew
up all 256MB of TCE mappings on pSeries systems, as evidenced by
numerous error messages:

 iommu_alloc failed, tbl c0000000010d5c48 vaddr c0000000d875eff0 npages 1

Some experimentation indicates that this is essentially because
one 1500 byte ethernet MTU gets mapped as a 64K DMA region when
the large 64K pages are enabled. Thus, it doesn't take much to
exhaust all of the available DMA mappings for a high-speed card.

This patch changes the iommu allocator to work with its own
unique, distinct page size. Although the patch is long, its
actually quite simple: it just #defines a distinct IOMMU_PAGE_SIZE
and then uses this in all the places that matter.

As a side effect, it also dramatically improves network performance
on platforms with H-calls on iommu translation inserts/removes (since
we no longer call it 16 times for a 1500 bytes packet when the iommu HW
is still 4k).

In the future, we might want to make the IOMMU_PAGE_SIZE a variable
in the iommu_table instance, thus allowing support for different HW
page sizes in the iommu itself.

Signed-off-by: Linas Vepstas 
Signed-off-by: Benjamin Herrenschmidt 
Acked-by: Olof Johansson 
Acked-by: Stephen Rothwell 
Signed-off-by: Paul Mackerras

[POWERPC] Fix CHRP platforms with only 8259

2006-10-25T03:49:22+00:00

On CHRP platforms with only a 8259 controller, we should set the
default IRQ host to the 8259 driver's one for the IRQ probing
fallbacks to work in case the IRQ tree is incorrect (like on
Pegasos for example). Without this fix, we get a bunch of WARN_ON's
during boot.

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Paul Mackerras

[POWERPC] IPIC: Fix spinlock recursion in set_irq_handler

2006-10-25T03:49:22+00:00

This causes ipic_set_irq_type to set the handler directly rather
than call set_irq_handler, which causes spinlock recursion because
the lock is already held when ipic_set_irq_type is called.

I'm also not convinced that ipic_set_irq_type should be changing the
handler at all.  There seem to be several controllers that don't and
several that do.  Those that do would break what appears to be a common
usage of calling set_irq_chip_and_handler followed by set_irq_type, if a
non-standard handler were to be used.  OTOH, irq_create_of_mapping()
doesn't set the handler, but only calls set_irq_type().

This patch gets things working in the spinlock-debugging-enabled case,
but I'm curious as to where the handler setting is ideally supposed to be
done.  I don't see any documentation on set_irq_type() that clarifies
what the semantics are supposed to be.

Signed-off-by: Scott Wood 
Signed-off-by: Paul Mackerras

[POWERPC] Fix the UCC rx/tx clock of QE

2006-10-25T03:49:22+00:00

MPC8323EMDS board ethernet interface with RMII uses the CLK16 divisor
for the rx and tx clock, but the ucc_set_qe_mux_rxtx() function doesn't
handle the CLK16 setting of the CMXUCR3 and CMXUCR4 registers.  This
fixes it.

Signed-off-by: Dave Liu 
Signed-off-by: Paul Mackerras

[POWERPC] Fix spelling errors in ucc_fast.c and ucc_slow.c

2006-10-23T08:23:17+00:00

In ucc_fast.c and ucc_slow.c, "illegal" is twice spelled "illagal".

Signed-off-by: Timur Tabi 
Signed-off-by: Paul Mackerras

[POWERPC] Fix compiler warning message on get_property call

2006-10-23T08:20:12+00:00

This fixes the warning message from the return value of function
get_property(), by making sure that the variable that receives the
value is marked as const.

Signed-off-by: Roy Zang	

--
Signed-off-by: Paul Mackerras

[HEADERS] Put linux/config.h out of its misery.

2006-10-09T23:13:51+00:00

Signed-off-by: Dave Jones

[POWERPC] Fix up after irq changes

2006-10-07T12:08:26+00:00

Remove struct pt_regs * from all handlers.
Also remove the regs argument from get_irq() functions.
Compile tested with arch/powerpc/config/* and
arch/ppc/configs/prep_defconfig

Signed-off-by: Olaf Hering 
Signed-off-by: Paul Mackerras

[POWERPC] Fix fsl_soc build breaks

2006-10-07T00:10:13+00:00

Hrm, there's no way this ever built at time of merge. There's a missing } and
the wrong type on phy_irq.

Also, another const for get_property().

  CC      arch/powerpc/sysdev/fsl_soc.o
arch/powerpc/sysdev/fsl_soc.c: In function 'fs_enet_of_init':
arch/powerpc/sysdev/fsl_soc.c:625: error: assignment of read-only variable 'phy_irq'
arch/powerpc/sysdev/fsl_soc.c:625: warning: assignment makes integer from pointer without a cast
arch/powerpc/sysdev/fsl_soc.c:661: warning: assignment discards qualifiers from pointer target type
arch/powerpc/sysdev/fsl_soc.c:684: error: subscripted value is neither array nor pointer
arch/powerpc/sysdev/fsl_soc.c:687: error: subscripted value is neither array nor pointer
arch/powerpc/sysdev/fsl_soc.c:722: warning: ISO C90 forbids mixed declarations and code
arch/powerpc/sysdev/fsl_soc.c:728: error: invalid storage class for function 'cpm_uart_of_init'
arch/powerpc/sysdev/fsl_soc.c:798: error: initializer element is not constant
arch/powerpc/sysdev/fsl_soc.c:798: error: expected declaration or statement at end of input
make[1]: *** [arch/powerpc/sysdev/fsl_soc.o] Error 1

Signed-off-by: Olof Johansson 
Signed-off-by: Paul Mackerras