summaryrefslogtreecommitdiffstats
path: root/kernel/dma
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2019-03-07 12:56:26 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2019-03-07 12:56:26 -0800
commit6c3ac1134371b51c9601171af2c32153ccb11100 (patch)
tree4e9d69885b3a3aa22fb0d44941d88d05d914f976 /kernel/dma
parentd72cb8c7d9dbd9ce820c80f3fddb56b296ba96fc (diff)
parent9580b71b5a7863c24a9bd18bcd2ad759b86b1eff (diff)
downloadlinux-6c3ac1134371b51c9601171af2c32153ccb11100.tar.bz2
Merge tag 'powerpc-5.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc updates from Michael Ellerman: "Notable changes: - Enable THREAD_INFO_IN_TASK to move thread_info off the stack. - A big series from Christoph reworking our DMA code to use more of the generic infrastructure, as he said: "This series switches the powerpc port to use the generic swiotlb and noncoherent dma ops, and to use more generic code for the coherent direct mapping, as well as removing a lot of dead code." - Increase our vmalloc space to 512T with the Hash MMU on modern CPUs, allowing us to support machines with larger amounts of total RAM or distance between nodes. - Two series from Christophe, one to optimise TLB miss handlers on 6xx, and another to optimise the way STRICT_KERNEL_RWX is implemented on some 32-bit CPUs. - Support for KCOV coverage instrumentation which means we can run syzkaller and discover even more bugs in our code. And as always many clean-ups, reworks and minor fixes etc. Thanks to: Alan Modra, Alexey Kardashevskiy, Alistair Popple, Andrea Arcangeli, Andrew Donnellan, Aneesh Kumar K.V, Aravinda Prasad, Balbir Singh, Brajeswar Ghosh, Breno Leitao, Christian Lamparter, Christian Zigotzky, Christophe Leroy, Christoph Hellwig, Corentin Labbe, Daniel Axtens, David Gibson, Diana Craciun, Firoz Khan, Gustavo A. R. Silva, Igor Stoppa, Joe Lawrence, Joel Stanley, Jonathan Neuschäfer, Jordan Niethe, Laurent Dufour, Madhavan Srinivasan, Mahesh Salgaonkar, Mark Cave-Ayland, Masahiro Yamada, Mathieu Malaterre, Matteo Croce, Meelis Roos, Michael W. Bringmann, Nathan Chancellor, Nathan Fontenot, Nicholas Piggin, Nick Desaulniers, Nicolai Stange, Oliver O'Halloran, Paul Mackerras, Peter Xu, PrasannaKumar Muralidharan, Qian Cai, Rashmica Gupta, Reza Arbab, Robert P. J. Day, Russell Currey, Sabyasachi Gupta, Sam Bobroff, Sandipan Das, Sergey Senozhatsky, Souptick Joarder, Stewart Smith, Tyrel Datwyler, Vaibhav Jain, YueHaibing" * tag 'powerpc-5.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (200 commits) powerpc/32: Clear on-stack exception marker upon exception return powerpc: Remove export of save_stack_trace_tsk_reliable() powerpc/mm: fix "section_base" set but not used powerpc/mm: Fix "sz" set but not used warning powerpc/mm: Check secondary hash page table powerpc: remove nargs from __SYSCALL powerpc/64s: Fix unrelocated interrupt trampoline address test powerpc/powernv/ioda: Fix locked_vm counting for memory used by IOMMU tables powerpc/fsl: Fix the flush of branch predictor. powerpc/powernv: Make opal log only readable by root powerpc/xmon: Fix opcode being uninitialized in print_insn_powerpc powerpc/powernv: move OPAL call wrapper tracing and interrupt handling to C powerpc/64s: Fix data interrupts vs d-side MCE reentrancy powerpc/64s: Prepare to handle data interrupts vs d-side MCE reentrancy powerpc/64s: system reset interrupt preserve HSRRs powerpc/64s: Fix HV NMI vs HV interrupt recoverability test powerpc/mm/hash: Handle mmap_min_addr correctly in get_unmapped_area topdown search powerpc/hugetlb: Handle mmap_min_addr correctly in get_unmapped_area callback selftests/powerpc: Remove duplicate header powerpc sstep: Add support for modsd, modud instructions ...
Diffstat (limited to 'kernel/dma')
-rw-r--r--kernel/dma/Kconfig3
-rw-r--r--kernel/dma/direct.c3
-rw-r--r--kernel/dma/mapping.c11
-rw-r--r--kernel/dma/swiotlb.c12
4 files changed, 11 insertions, 18 deletions
diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig
index ca88b867e7fe..0711d18645de 100644
--- a/kernel/dma/Kconfig
+++ b/kernel/dma/Kconfig
@@ -16,6 +16,9 @@ config ARCH_DMA_ADDR_T_64BIT
config ARCH_HAS_DMA_COHERENCE_H
bool
+config ARCH_HAS_DMA_SET_MASK
+ bool
+
config HAVE_GENERIC_DMA_COHERENT
bool
diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
index 355d16acee6d..d5bb51cf27c6 100644
--- a/kernel/dma/direct.c
+++ b/kernel/dma/direct.c
@@ -132,8 +132,7 @@ again:
goto again;
}
- if (IS_ENABLED(CONFIG_ZONE_DMA) &&
- phys_mask < DMA_BIT_MASK(32) && !(gfp & GFP_DMA)) {
+ if (IS_ENABLED(CONFIG_ZONE_DMA) && !(gfp & GFP_DMA)) {
gfp = (gfp & ~GFP_DMA32) | GFP_DMA;
goto again;
}
diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c
index a11006b6d8e8..ef2aba503467 100644
--- a/kernel/dma/mapping.c
+++ b/kernel/dma/mapping.c
@@ -207,7 +207,6 @@ int dma_mmap_attrs(struct device *dev, struct vm_area_struct *vma,
}
EXPORT_SYMBOL(dma_mmap_attrs);
-#ifndef ARCH_HAS_DMA_GET_REQUIRED_MASK
static u64 dma_default_get_required_mask(struct device *dev)
{
u32 low_totalram = ((max_pfn - 1) << PAGE_SHIFT);
@@ -238,7 +237,6 @@ u64 dma_get_required_mask(struct device *dev)
return dma_default_get_required_mask(dev);
}
EXPORT_SYMBOL_GPL(dma_get_required_mask);
-#endif
#ifndef arch_dma_alloc_attrs
#define arch_dma_alloc_attrs(dev) (true)
@@ -318,18 +316,23 @@ int dma_supported(struct device *dev, u64 mask)
}
EXPORT_SYMBOL(dma_supported);
-#ifndef HAVE_ARCH_DMA_SET_MASK
+#ifdef CONFIG_ARCH_HAS_DMA_SET_MASK
+void arch_dma_set_mask(struct device *dev, u64 mask);
+#else
+#define arch_dma_set_mask(dev, mask) do { } while (0)
+#endif
+
int dma_set_mask(struct device *dev, u64 mask)
{
if (!dev->dma_mask || !dma_supported(dev, mask))
return -EIO;
+ arch_dma_set_mask(dev, mask);
dma_check_mask(dev, mask);
*dev->dma_mask = mask;
return 0;
}
EXPORT_SYMBOL(dma_set_mask);
-#endif
#ifndef CONFIG_ARCH_HAS_DMA_SET_COHERENT_MASK
int dma_set_coherent_mask(struct device *dev, u64 mask)
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index 1fb6fd68b9c7..6d0236bd3929 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -650,15 +650,3 @@ bool swiotlb_map(struct device *dev, phys_addr_t *phys, dma_addr_t *dma_addr,
return true;
}
-
-/*
- * Return whether the given device DMA address mask can be supported
- * properly. For example, if your device can only drive the low 24-bits
- * during bus mastering, then you would pass 0x00ffffff as the mask to
- * this function.
- */
-int
-swiotlb_dma_supported(struct device *hwdev, u64 mask)
-{
- return __phys_to_dma(hwdev, io_tlb_end - 1) <= mask;
-}