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2017-07-06Merge tag 'dma-mapping-4.13' of git://git.infradead.org/users/hch/dma-mappingLinus Torvalds1-2/+2
Pull dma-mapping infrastructure from Christoph Hellwig: "This is the first pull request for the new dma-mapping subsystem In this new subsystem we'll try to properly maintain all the generic code related to dma-mapping, and will further consolidate arch code into common helpers. This pull request contains: - removal of the DMA_ERROR_CODE macro, replacing it with calls to ->mapping_error so that the dma_map_ops instances are more self contained and can be shared across architectures (me) - removal of the ->set_dma_mask method, which duplicates the ->dma_capable one in terms of functionality, but requires more duplicate code. - various updates for the coherent dma pool and related arm code (Vladimir) - various smaller cleanups (me)" * tag 'dma-mapping-4.13' of git://git.infradead.org/users/hch/dma-mapping: (56 commits) ARM: dma-mapping: Remove traces of NOMMU code ARM: NOMMU: Set ARM_DMA_MEM_BUFFERABLE for M-class cpus ARM: NOMMU: Introduce dma operations for noMMU drivers: dma-mapping: allow dma_common_mmap() for NOMMU drivers: dma-coherent: Introduce default DMA pool drivers: dma-coherent: Account dma_pfn_offset when used with device tree dma: Take into account dma_pfn_offset dma-mapping: replace dmam_alloc_noncoherent with dmam_alloc_attrs dma-mapping: remove dmam_free_noncoherent crypto: qat - avoid an uninitialized variable warning au1100fb: remove a bogus dma_free_nonconsistent call MAINTAINERS: add entry for dma mapping helpers powerpc: merge __dma_set_mask into dma_set_mask dma-mapping: remove the set_dma_mask method powerpc/cell: use the dma_supported method for ops switching powerpc/cell: clean up fixed mapping dma_ops initialization tile: remove dma_supported and mapping_error methods xen-swiotlb: remove xen_swiotlb_set_dma_mask arm: implement ->dma_supported instead of ->set_dma_mask mips/loongson64: implement ->dma_supported instead of ->set_dma_mask ...
2017-06-20firmware/ivc: use dma_mapping_errorChristoph Hellwig1-2/+2
DMA_ERROR_CODE is not supposed to be used by drivers. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Thierry Reding <treding@nvidia.com>
2017-06-18Merge tag 'tegra-for-4.13-firmware' of ↵Olof Johansson1-10/+18
git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into next/drivers firmware: tegra: Changes for v4.13-rc1 This contains a fix for missing semaphore release in error paths as well as a bogus error code return in the BPMP firmware implementation. * tag 'tegra-for-4.13-firmware' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux: firmware: tegra: Fix locking bugs in BPMP Signed-off-by: Olof Johansson <olof@lixom.net>
2017-06-14firmware: tegra: Fix locking bugs in BPMPDan Carpenter1-10/+18
There are a bunch of error paths were we don't unlock the bpmp->threaded lock. Also if __tegra_bpmp_channel_write() fails then we returned success instead of an error code. Fixes: 983de5f97169 ("firmware: tegra: Add BPMP support") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
2017-06-13soc/tegra: bpmp: Implement generic PM domainsThierry Reding1-0/+4
The BPMP firmware, found on Tegra186 and later, provides an ABI that can be used to enable and disable power to several power partitions in Tegra SoCs. The ABI allows for enumeration of the available power partitions, so the driver can be reused on future generations, provided the BPMP ABI remains stable. Based on work by Stefan Kristiansson <stefank@nvidia.com> and Mikko Perttunen <mperttunen@nvidia.com>. Signed-off-by: Thierry Reding <treding@nvidia.com> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
2017-03-02sched/headers: Prepare for new header dependencies before moving code to ↵Ingo Molnar1-0/+1
<linux/sched/clock.h> We are going to split <linux/sched/clock.h> out of <linux/sched.h>, which will have to be picked up from other headers and .c files. Create a trivial placeholder <linux/sched/clock.h> file that just maps to <linux/sched.h> to make this patch obviously correct and bisectable. Include the new header in the files that are going to need it. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-11-18firmware: tegra: Add BPMP supportThierry Reding3-0/+881
The Boot and Power Management Processor (BPMP) is a co-processor found on Tegra SoCs. It is designed to handle the early stages of the boot process and offload power management tasks (such as clocks, resets, powergates, ...) as well as system control services. Compared to the ARM SCPI, the services provided by BPMP are message- based rather than method-based. The BPMP firmware driver provides the services to transmit data to and receive data from the BPMP. Users can also register a Message ReQuest (MRQ), for which a service routine will be run when a corresponding event is received from the firmware. A set of messages, called the BPMP ABI, are specified for a number of different services provided by the BPMP (such as clocks or resets). Based on work by Sivaram Nair <sivaramn@nvidia.com> and Joseph Lo <josephl@nvidia.com>. Signed-off-by: Thierry Reding <treding@nvidia.com>
2016-11-18firmware: tegra: Add IVC libraryThierry Reding3-0/+709
The Inter-VM communication (IVC) is a communication protocol which is designed for interprocessor communication (IPC) or the communication between the hypervisor and the virtual machine with a guest OS. Message channels are used to communicate between processors. They are backed by DRAM or SRAM, so care must be taken to maintain coherence of data. The IVC library maintains memory-based descriptors for the transmission and reception channels as well as the data coherence of the counter and payload. Clients, such as the driver for the BPMP firmware, can use the library to exchange messages with remote processors. Based on work by Peter Newman <pnewman@nvidia.com> and Joseph Lo <josephl@nvidia.com>. Signed-off-by: Thierry Reding <treding@nvidia.com>