Hi Sricharan
On 2017-01-23 17:18, Sricharan R wrote:
This series calls the dma ops configuration for the devices
at a generic place so that it works for all busses.
The dma_configure_ops for a device is now called during
the device_attach callback just before the probe of the
bus/driver is called. Similarly dma_deconfigure is called during
device/driver_detach path.
pci_bus_add_devices (platform/amba)(_device_create/driver_register)
| |
pci_bus_add_device (device_add/driver_register)
| |
device_attach device_initial_probe
| |
__device_attach_driver __device_attach_driver
|
driver_probe_device
|
really_probe
|
dma_configure
Similarly on the device/driver_unregister path __device_release_driver is
called which inturn calls dma_deconfigure.
Took the reworked patches [2] from Robin's branch and
rebased on top of Lorenzo's ACPI IORT ARM support series [3].
* Tested with platform and pci devices for probe deferral
and reprobe on arm64 based platform.
* Need help for testing with ACPI.
Once again:
Tested-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Works fine on Exynos machines (both, ARM and ARM64 based). This patchset is
urgently needed as more and more stuff depends on it and cannot be easily
workarounded without nasty hacks (for example pending runtime PM changes
for clocks and power domains integration for Exynos 5433).
Is there a chance to have it merged to v4.11?
Previous post of this series [6].
[V7]
* Updated the subject and commit log for patch #6 as per
comments from Lorenzo. No functional changes.
[V6]
* Fixed a bug in dma_configure function pointed out by
Robin.
* Reordered the patches as per comments from Robin and
Lorenzo.
* Added Tags.
[V5]
* Reworked the pci configuration code hanging outside and
pushed it to dma_configure as in PATCH#5,6,7.
Also added a couple of patches that Lorenzo provided for
correcting the Probe deferring mechanism in case of
ACPI devices from here [5].
[V4]
* Took the reworked patches [2] from Robin's branch and
rebased on top of Lorenzo's ACPI IORT ARM support series [3].
* Added the patches for moving the dma ops configuration of
acpi based devices to probe time as well.
[V3]
* Removed the patch to split dma_masks/dma_ops configuration
separately based on review comments that both masks and ops are
required only during the device probe time.
* Reworked the series based on Generic DT bindings series.
* Added call to iommu's remove_device in the cleanup path for arm and
arm64.
* Removed the notifier trick in arm64 to handle early device
registration.
* Added reset of dma_ops in cleanup path for arm based on comments.
* Fixed the pci_iommu_configure path and tested with PCI device as
well.
* Fixed a bug to return the correct iommu_ops from patch 7 [4] in
last post.
* Fixed few other cosmetic comments.
[V2]
* Updated the Initial post to call dma_configure/deconfigure from
generic code
* Added iommu add_device callback from of_iommu_configure path
[V1]
* Initial post from Laurent Pinchart [1]
[1] http://lists.linuxfoundation.org/pipermail/iommu/2015-May/013016.html
[2] http://www.linux-arm.org/git?p=linux-rm.git;a=shortlog;h=refs/heads/iommu/defer
[3] https://lkml.org/lkml/2016/11/21/141
[4] https://www.mail-archive.com/iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx/msg13940.html
[5] git://git.kernel.org/pub/scm/linux/kernel/git/lpieralisi/linux.git iommu/probe-deferral
[6] https://www.spinics.net/lists/arm-kernel/msg556546.html
Laurent Pinchart (3):
of: dma: Move range size workaround to of_dma_get_range()
of: dma: Make of_dma_deconfigure() public
iommu: of: Handle IOMMU lookup failure with deferred probing or error
Lorenzo Pieralisi (2):
ACPI/IORT: Add function to check SMMUs drivers presence
ACPI/IORT: Remove linker section for IORT entries probing
Robin Murphy (3):
iommu/of: Refactor of_iommu_configure() for error handling
iommu/of: Prepare for deferred IOMMU configuration
iommu/arm-smmu: Clean up early-probing workarounds
Sricharan R (3):
of/acpi: Configure dma operations at probe time for platform/amba/pci bus devices
drivers: acpi: Handle IOMMU lookup failure with deferred probing or
error
arm64: dma-mapping: Remove the notifier trick to handle early setting
of dma_ops
arch/arm64/mm/dma-mapping.c | 132 ++++----------------------------------
drivers/acpi/arm64/iort.c | 40 +++++++++++-
drivers/acpi/glue.c | 5 --
drivers/acpi/scan.c | 7 +-
drivers/base/dd.c | 9 +++
drivers/base/dma-mapping.c | 41 ++++++++++++
drivers/iommu/arm-smmu-v3.c | 46 +------------
drivers/iommu/arm-smmu.c | 58 +++--------------
drivers/iommu/of_iommu.c | 114 +++++++++++++++++++++++---------
drivers/of/address.c | 20 +++++-
drivers/of/device.c | 36 ++++++-----
drivers/of/platform.c | 10 +--
drivers/pci/probe.c | 28 --------
include/acpi/acpi_bus.h | 2 +-
include/asm-generic/vmlinux.lds.h | 1 -
include/linux/acpi.h | 7 +-
include/linux/acpi_iort.h | 3 -
include/linux/dma-mapping.h | 3 +
include/linux/of_device.h | 10 ++-
19 files changed, 252 insertions(+), 320 deletions(-)
Best regards
--
Marek Szyprowski, PhD
Samsung R&D Institute Poland
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