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linux/arch/powerpc/platforms/powernv
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Alistair Popple 253fd51e2f powerpc/powernv/pci: Return failure for some uses of dma_set_mask() 
Commit 8e3f1b1d82 ("powerpc/powernv/pci: Enable 64-bit devices to access
>4GB DMA space") introduced the ability for PCI device drivers to request a
DMA mask between 64 and 32 bits and actually get a mask greater than
32-bits. However currently if certain machine configuration dependent
conditions are not meet the code silently falls back to a 32-bit mask.

This makes it hard for device drivers to detect which mask they actually
got. Instead we should return an error when the request could not be
fulfilled which allows drivers to either fallback or implement other
workarounds as documented in DMA-API-HOWTO.txt.

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Acked-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
 		2017-07-28 23:02:55 +10:00
..
Kconfig powerpc/powernv: Always enable SMP when building powernv 2017-04-13 23:37:17 +10:00
Makefile powerpc/powernv: Split cxl code out into a separate file 2016-07-14 20:26:31 +10:00
eeh-powernv.c powerpc/powernv/pci: Dynamically allocate PHB diag data 2017-06-27 12:14:27 +10:00
idle.c powerpc/64s/idle: Run latch switch is done with MSR[EE]=0 2017-06-19 19:46:30 +10:00
npu-dma.c powerpc/powernv/npu-dma: Add explicit flush when sending an ATSD 2017-06-22 21:21:08 +10:00
opal-async.c powerpc/opal: Wake up kopald polling thread before waiting for events 2016-07-08 19:53:26 +10:00
opal-dump.c powerpc/powernv : Drop reference added by kset_find_obj() 2016-08-29 12:48:21 +10:00
opal-elog.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
opal-flash.c powerpc/powernv: Add interfaces for flash device access 2015-04-11 20:49:21 +10:00
opal-hmi.c powerpc/powernv: Display the correct error info for CAPP errors. 2017-02-09 10:31:36 +11:00
opal-irqchip.c powerpc/opal-irqchip: Use interrupt names if present 2017-02-09 10:31:37 +11:00
opal-kmsg.c powerpc/powernv: Fix OPAL_CONSOLE_FLUSH prototype and usages 2016-01-13 12:35:17 +11:00
opal-lpc.c powerpc: Create asm/debugfs.h and move powerpc_debugfs_root there 2017-04-11 07:46:03 +10:00
opal-memory-errors.c powerpc/powernv: Fix spelling mistake "Retrived" -> "Retrieved" 2016-06-28 13:52:18 +10:00
opal-msglog.c powerpc/powernv: Report size of OPAL memcons log 2017-01-25 13:33:55 +11:00
opal-nvram.c powerpc/powernv: Add pstore support on powernv 2015-03-23 14:06:10 +11:00
opal-power.c powerpc/powernv: Add poweroff (EPOW, DPO) events support for PowerNV platform 2015-07-16 13:34:36 +10:00
opal-prd.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
opal-rtc.c powerpc/powernv: Only delay opal_rtc_read() retry when necessary 2015-12-27 19:12:40 +11:00
opal-sensor.c powerpc/powernv: Handle OPAL_WRONG_STATE in opal_get_sensor_data() 2017-03-31 15:22:56 +11:00
opal-sysparam.c powerpc/opal: Add inline function to get rc from an ASYNC_COMP opal_msg 2016-06-29 17:33:18 +10:00
opal-tracepoints.c tracing: Have the reg function allow to fail 2016-12-09 09:13:30 -05:00
opal-wrappers.S powerpc/64s: Fix OPAL_CALL non-maskable interrupt reentrancy 2017-05-30 14:59:51 +10:00
opal-xscom.c powerpc/powernv: Fix XSCOM address mangling for form 1 indirect 2017-03-28 10:52:03 +11:00
opal.c powerpc/powernv: Fix boot on Power8 bare metal due to opal_configure_cores() 2017-07-17 21:30:32 +10:00
pci-cxl.c powerpc: Remove all usages of NO_IRQ 2016-09-20 20:57:12 +10:00
pci-ioda.c powerpc/powernv/pci: Return failure for some uses of dma_set_mask() 2017-07-28 23:02:55 +10:00
pci.c powerpc/powernv/pci: Add support for PHB4 diagnostics 2017-06-27 12:14:27 +10:00
pci.h powerpc/powernv/pci: Dynamically allocate PHB diag data 2017-06-27 12:14:27 +10:00
powernv.h powerpc/powernv: Move CPU-Offline idle state invocation from smp.c to idle.c 2017-04-11 08:45:09 +10:00
rng.c powerpc: Consolidate variants of real-mode MMIOs 2017-04-10 21:43:16 +10:00
setup.c powerpc/powernv: Tell OPAL about our MMU mode on POWER9 2017-07-10 21:12:27 +10:00
smp.c powerpc/smp: Convert NR_CPUS to nr_cpu_ids 2017-06-28 13:08:16 +10:00
subcore-asm.S powerpc/powernv: Add support for POWER8 split core on powernv 2014-05-28 13:35:37 +10:00
subcore.c powerpc updates for 4.13 2017-07-07 13:55:45 -07:00
subcore.h powernv/powerpc: Add winkle support for offline cpus 2014-12-15 10:46:41 +11:00