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authorLinus Torvalds <torvalds@linux-foundation.org>2018-06-04 10:58:12 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-06-04 10:58:12 -0700
commite5a594643a3444d39c1467040e638bf08a4e0db8 (patch)
treee65c94ef60a51559db467055232ce1021ec263e1 /arch/parisc
parentf956d08a56732c61a4d44e8034eeeedfc06fe721 (diff)
parent2550bbfd495227945e17ed1fa1c05bce4753b86b (diff)
downloadlinux-e5a594643a3444d39c1467040e638bf08a4e0db8.tar.bz2
Merge tag 'dma-mapping-4.18' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping updates from Christoph Hellwig: - replace the force_dma flag with a dma_configure bus method. (Nipun Gupta, although one patch is Ñ–ncorrectly attributed to me due to a git rebase bug) - use GFP_DMA32 more agressively in dma-direct. (Takashi Iwai) - remove PCI_DMA_BUS_IS_PHYS and rely on the dma-mapping API to do the right thing for bounce buffering. - move dma-debug initialization to common code, and apply a few cleanups to the dma-debug code. - cleanup the Kconfig mess around swiotlb selection - swiotlb comment fixup (Yisheng Xie) - a trivial swiotlb fix. (Dan Carpenter) - support swiotlb on RISC-V. (based on a patch from Palmer Dabbelt) - add a new generic dma-noncoherent dma_map_ops implementation and use it for arc, c6x and nds32. - improve scatterlist validity checking in dma-debug. (Robin Murphy) - add a struct device quirk to limit the dma-mask to 32-bit due to bridge/system issues, and switch x86 to use it instead of a local hack for VIA bridges. - handle devices without a dma_mask more gracefully in the dma-direct code. * tag 'dma-mapping-4.18' of git://git.infradead.org/users/hch/dma-mapping: (48 commits) dma-direct: don't crash on device without dma_mask nds32: use generic dma_noncoherent_ops nds32: implement the unmap_sg DMA operation nds32: consolidate DMA cache maintainance routines x86/pci-dma: switch the VIA 32-bit DMA quirk to use the struct device flag x86/pci-dma: remove the explicit nodac and allowdac option x86/pci-dma: remove the experimental forcesac boot option Documentation/x86: remove a stray reference to pci-nommu.c core, dma-direct: add a flag 32-bit dma limits dma-mapping: remove unused gfp_t parameter to arch_dma_alloc_attrs dma-debug: check scatterlist segments c6x: use generic dma_noncoherent_ops arc: use generic dma_noncoherent_ops arc: fix arc_dma_{map,unmap}_page arc: fix arc_dma_sync_sg_for_{cpu,device} arc: simplify arc_dma_sync_single_for_{cpu,device} dma-mapping: provide a generic dma-noncoherent implementation dma-mapping: simplify Kconfig dependencies riscv: add swiotlb support riscv: only enable ZONE_DMA32 for 64-bit ...
Diffstat (limited to 'arch/parisc')
-rw-r--r--arch/parisc/Kconfig8
-rw-r--r--arch/parisc/include/asm/pci.h23
-rw-r--r--arch/parisc/kernel/setup.c5
3 files changed, 2 insertions, 34 deletions
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index fc5a574c3482..4d8f64d48597 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -51,6 +51,8 @@ config PARISC
select GENERIC_CLOCKEVENTS
select ARCH_NO_COHERENT_DMA_MMAP
select CPU_NO_EFFICIENT_FFS
+ select NEED_DMA_MAP_STATE
+ select NEED_SG_DMA_LENGTH
help
The PA-RISC microprocessor is designed by Hewlett-Packard and used
@@ -111,12 +113,6 @@ config PM
config STACKTRACE_SUPPORT
def_bool y
-config NEED_DMA_MAP_STATE
- def_bool y
-
-config NEED_SG_DMA_LENGTH
- def_bool y
-
config ISA_DMA_API
bool
diff --git a/arch/parisc/include/asm/pci.h b/arch/parisc/include/asm/pci.h
index 96b7deec512d..3328fd17c19d 100644
--- a/arch/parisc/include/asm/pci.h
+++ b/arch/parisc/include/asm/pci.h
@@ -88,29 +88,6 @@ struct pci_hba_data {
#endif /* !CONFIG_64BIT */
/*
- * If the PCI device's view of memory is the same as the CPU's view of memory,
- * PCI_DMA_BUS_IS_PHYS is true. The networking and block device layers use
- * this boolean for bounce buffer decisions.
- */
-#ifdef CONFIG_PA20
-/* All PA-2.0 machines have an IOMMU. */
-#define PCI_DMA_BUS_IS_PHYS 0
-#define parisc_has_iommu() do { } while (0)
-#else
-
-#if defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA)
-extern int parisc_bus_is_phys; /* in arch/parisc/kernel/setup.c */
-#define PCI_DMA_BUS_IS_PHYS parisc_bus_is_phys
-#define parisc_has_iommu() do { parisc_bus_is_phys = 0; } while (0)
-#else
-#define PCI_DMA_BUS_IS_PHYS 1
-#define parisc_has_iommu() do { } while (0)
-#endif
-
-#endif /* !CONFIG_PA20 */
-
-
-/*
** Most PCI devices (eg Tulip, NCR720) also export the same registers
** to both MMIO and I/O port space. Due to poor performance of I/O Port
** access under HP PCI bus adapters, strongly recommend the use of MMIO
diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c
index 0e9675f857a5..8d3a7b80ac42 100644
--- a/arch/parisc/kernel/setup.c
+++ b/arch/parisc/kernel/setup.c
@@ -58,11 +58,6 @@ struct proc_dir_entry * proc_runway_root __read_mostly = NULL;
struct proc_dir_entry * proc_gsc_root __read_mostly = NULL;
struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL;
-#if !defined(CONFIG_PA20) && (defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA))
-int parisc_bus_is_phys __read_mostly = 1; /* Assume no IOMMU is present */
-EXPORT_SYMBOL(parisc_bus_is_phys);
-#endif
-
void __init setup_cmdline(char **cmdline_p)
{
extern unsigned int boot_args[];