/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __ASM_ARM_DMA_H #define __ASM_ARM_DMA_H /* * This is the maximum virtual address which can be DMA'd from. */ #ifndef CONFIG_ZONE_DMA #define MAX_DMA_ADDRESS 0xffffffffUL #else #define MAX_DMA_ADDRESS ({ \ extern phys_addr_t arm_dma_zone_size; \ arm_dma_zone_size && arm_dma_zone_size < (0x10000000 - PAGE_OFFSET) ? \ (PAGE_OFFSET + arm_dma_zone_size) : 0xffffffffUL; }) #endif #ifdef CONFIG_ISA_DMA_API /* * This is used to support drivers written for the x86 ISA DMA API. * It should not be re-used except for that purpose. */ #include <linux/spinlock.h> #include <linux/scatterlist.h> #include <mach/isa-dma.h> /* * The DMA modes reflect the settings for the ISA DMA controller */ #define DMA_MODE_MASK 0xcc #define DMA_MODE_READ 0x44 #define DMA_MODE_WRITE 0x48 #define DMA_MODE_CASCADE 0xc0 #define DMA_AUTOINIT 0x10 extern raw_spinlock_t dma_spin_lock; static inline unsigned long claim_dma_lock(void) { unsigned long flags; raw_spin_lock_irqsave(&dma_spin_lock, flags); return flags; } static inline void release_dma_lock(unsigned long flags) { raw_spin_unlock_irqrestore(&dma_spin_lock, flags); } /* Clear the 'DMA Pointer Flip Flop'. * Write 0 for LSB/MSB, 1 for MSB/LSB access. */ #define clear_dma_ff(chan) /* Set only the page register bits of the transfer address. * * NOTE: This is an architecture specific function, and should * be hidden from the drivers */ extern void set_dma_page(unsigned int chan, char pagenr); /* Request a DMA channel * * Some architectures may need to do allocate an interrupt */ extern int request_dma(unsigned int chan, const char * device_id); /* Free a DMA channel * * Some architectures may need to do free an interrupt */ extern void free_dma(unsigned int chan); /* Enable DMA for this channel * * On some architectures, this may have other side effects like * enabling an interrupt and setting the DMA registers. */ extern void enable_dma(unsigned int chan); /* Disable DMA for this channel * * On some architectures, this may have other side effects like * disabling an interrupt or whatever. */ extern void disable_dma(unsigned int chan); /* Test whether the specified channel has an active DMA transfer */ extern int dma_channel_active(unsigned int chan); /* Set the DMA scatter gather list for this channel * * This should not be called if a DMA channel is enabled, * especially since some DMA architectures don't update the * DMA address immediately, but defer it to the enable_dma(). */ extern void set_dma_sg(unsigned int chan, struct scatterlist *sg, int nr_sg); /* Set the DMA address for this channel * * This should not be called if a DMA channel is enabled, * especially since some DMA architectures don't update the * DMA address immediately, but defer it to the enable_dma(). */ extern void __set_dma_addr(unsigned int chan, void *addr); #define set_dma_addr(chan, addr) \ __set_dma_addr(chan, (void *)__bus_to_virt(addr)) /* Set the DMA byte count for this channel * * This should not be called if a DMA channel is enabled, * especially since some DMA architectures don't update the * DMA count immediately, but defer it to the enable_dma(). */ extern void set_dma_count(unsigned int chan, unsigned long count); /* Set the transfer direction for this channel * * This should not be called if a DMA channel is enabled, * especially since some DMA architectures don't update the * DMA transfer direction immediately, but defer it to the * enable_dma(). */ extern void set_dma_mode(unsigned int chan, unsigned int mode); /* Set the transfer speed for this channel */ extern void set_dma_speed(unsigned int chan, int cycle_ns); /* Get DMA residue count. After a DMA transfer, this * should return zero. Reading this while a DMA transfer is * still in progress will return unpredictable results. * If called before the channel has been used, it may return 1. * Otherwise, it returns the number of _bytes_ left to transfer. */ extern int get_dma_residue(unsigned int chan); #ifndef NO_DMA #define NO_DMA 255 #endif #endif /* CONFIG_ISA_DMA_API */ #ifdef CONFIG_PCI extern int isa_dma_bridge_buggy; #else #define isa_dma_bridge_buggy (0) #endif #endif /* __ASM_ARM_DMA_H */
Name | Type | Size | Permission | Actions |
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hardware | Folder | 0755 |
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mach | Folder | 0755 |
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xen | Folder | 0755 |
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Kbuild | File | 568 B | 0644 |
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arch_gicv3.h | File | 9.05 KB | 0644 |
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arch_timer.h | File | 2.48 KB | 0644 |
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arm-cci.h | File | 1.05 KB | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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assembler.h | File | 10.46 KB | 0644 |
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atomic.h | File | 13.22 KB | 0644 |
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auxvec.h | File | 29 B | 0644 |
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bL_switcher.h | File | 2.28 KB | 0644 |
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barrier.h | File | 2.84 KB | 0644 |
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bitops.h | File | 8.62 KB | 0644 |
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bitrev.h | File | 451 B | 0644 |
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bug.h | File | 2.46 KB | 0644 |
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bugs.h | File | 546 B | 0644 |
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cache.h | File | 813 B | 0644 |
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cacheflush.h | File | 15.54 KB | 0644 |
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cachetype.h | File | 2.71 KB | 0644 |
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checksum.h | File | 3.71 KB | 0644 |
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clocksource.h | File | 153 B | 0644 |
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cmpxchg.h | File | 6.14 KB | 0644 |
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compiler.h | File | 978 B | 0644 |
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cp15.h | File | 3.84 KB | 0644 |
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cpu.h | File | 533 B | 0644 |
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cpufeature.h | File | 1.4 KB | 0644 |
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cpuidle.h | File | 1.33 KB | 0644 |
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cputype.h | File | 8.42 KB | 0644 |
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cti.h | File | 3.62 KB | 0644 |
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dcc.h | File | 1.01 KB | 0644 |
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delay.h | File | 2.83 KB | 0644 |
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device.h | File | 771 B | 0644 |
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div64.h | File | 3.17 KB | 0644 |
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dma-contiguous.h | File | 265 B | 0644 |
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dma-iommu.h | File | 1.01 KB | 0644 |
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dma-mapping.h | File | 7.44 KB | 0644 |
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dma.h | File | 4.18 KB | 0644 |
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dmi.h | File | 528 B | 0644 |
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domain.h | File | 3.65 KB | 0644 |
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ecard.h | File | 5.98 KB | 0644 |
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edac.h | File | 1.51 KB | 0644 |
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efi.h | File | 3.04 KB | 0644 |
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elf.h | File | 4.52 KB | 0644 |
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entry-macro-multi.S | File | 726 B | 0644 |
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exception.h | File | 571 B | 0644 |
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fb.h | File | 375 B | 0644 |
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fiq.h | File | 1.36 KB | 0644 |
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firmware.h | File | 1.82 KB | 0644 |
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fixmap.h | File | 1.84 KB | 0644 |
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flat.h | File | 915 B | 0644 |
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floppy.h | File | 3.61 KB | 0644 |
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fncpy.h | File | 3.08 KB | 0644 |
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fpstate.h | File | 1.73 KB | 0644 |
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ftrace.h | File | 1.92 KB | 0644 |
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futex.h | File | 4.24 KB | 0644 |
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glue-cache.h | File | 3.51 KB | 0644 |
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glue-df.h | File | 2.2 KB | 0644 |
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glue-pf.h | File | 1.12 KB | 0644 |
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glue-proc.h | File | 4.46 KB | 0644 |
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glue.h | File | 759 B | 0644 |
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gpio.h | File | 693 B | 0644 |
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hardirq.h | File | 803 B | 0644 |
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highmem.h | File | 2.15 KB | 0644 |
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hugetlb-3level.h | File | 2.03 KB | 0644 |
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hugetlb.h | File | 1.78 KB | 0644 |
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hw_breakpoint.h | File | 3.53 KB | 0644 |
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hw_irq.h | File | 349 B | 0644 |
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hwcap.h | File | 378 B | 0644 |
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hypervisor.h | File | 140 B | 0644 |
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ide.h | File | 566 B | 0644 |
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idmap.h | File | 355 B | 0644 |
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insn.h | File | 636 B | 0644 |
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io.h | File | 15.96 KB | 0644 |
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irq.h | File | 1015 B | 0644 |
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irq_work.h | File | 234 B | 0644 |
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irqflags.h | File | 3.88 KB | 0644 |
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jump_label.h | File | 1009 B | 0644 |
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kexec-internal.h | File | 272 B | 0644 |
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kexec.h | File | 2.3 KB | 0644 |
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kgdb.h | File | 2.72 KB | 0644 |
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kmap_types.h | File | 190 B | 0644 |
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kprobes.h | File | 2.65 KB | 0644 |
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kvm_arm.h | File | 7.6 KB | 0644 |
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kvm_asm.h | File | 2.84 KB | 0644 |
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kvm_coproc.h | File | 1.99 KB | 0644 |
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kvm_emulate.h | File | 7.84 KB | 0644 |
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kvm_host.h | File | 10.31 KB | 0644 |
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kvm_hyp.h | File | 4.49 KB | 0644 |
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kvm_mmio.h | File | 1.34 KB | 0644 |
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kvm_mmu.h | File | 7.27 KB | 0644 |
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limits.h | File | 166 B | 0644 |
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linkage.h | File | 216 B | 0644 |
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mc146818rtc.h | File | 720 B | 0644 |
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mcpm.h | File | 11.92 KB | 0644 |
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mcs_spinlock.h | File | 570 B | 0644 |
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memblock.h | File | 248 B | 0644 |
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memory.h | File | 10.12 KB | 0644 |
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mmu.h | File | 953 B | 0644 |
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mmu_context.h | File | 3.94 KB | 0644 |
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module.h | File | 1.57 KB | 0644 |
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mpu.h | File | 2.15 KB | 0644 |
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mtd-xip.h | File | 666 B | 0644 |
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neon.h | File | 1.16 KB | 0644 |
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nwflash.h | File | 252 B | 0644 |
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opcodes-sec.h | File | 742 B | 0644 |
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opcodes-virt.h | File | 1.32 KB | 0644 |
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opcodes.h | File | 8.07 KB | 0644 |
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outercache.h | File | 3.78 KB | 0644 |
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page-nommu.h | File | 957 B | 0644 |
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page.h | File | 3.61 KB | 0644 |
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paravirt.h | File | 454 B | 0644 |
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patch.h | File | 438 B | 0644 |
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pci.h | File | 956 B | 0644 |
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percpu.h | File | 1.56 KB | 0644 |
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perf_event.h | File | 850 B | 0644 |
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pgalloc.h | File | 3.79 KB | 0644 |
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pgtable-2level-hwdef.h | File | 3.45 KB | 0644 |
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pgtable-2level-types.h | File | 1.84 KB | 0644 |
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pgtable-2level.h | File | 8.51 KB | 0644 |
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pgtable-3level-hwdef.h | File | 3.95 KB | 0644 |
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pgtable-3level-types.h | File | 1.89 KB | 0644 |
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pgtable-3level.h | File | 9.54 KB | 0644 |
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pgtable-hwdef.h | File | 467 B | 0644 |
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pgtable-nommu.h | File | 2.66 KB | 0644 |
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pgtable.h | File | 11.68 KB | 0644 |
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probes.h | File | 1.73 KB | 0644 |
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proc-fns.h | File | 4.79 KB | 0644 |
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processor.h | File | 3.4 KB | 0644 |
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procinfo.h | File | 1.27 KB | 0644 |
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prom.h | File | 715 B | 0644 |
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psci.h | File | 771 B | 0644 |
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ptrace.h | File | 4.89 KB | 0644 |
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sections.h | File | 189 B | 0644 |
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set_memory.h | File | 1.04 KB | 0644 |
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setup.h | File | 934 B | 0644 |
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shmparam.h | File | 419 B | 0644 |
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signal.h | File | 500 B | 0644 |
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smp.h | File | 3.1 KB | 0644 |
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smp_plat.h | File | 2.48 KB | 0644 |
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smp_scu.h | File | 1.32 KB | 0644 |
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smp_twd.h | File | 908 B | 0644 |
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sparsemem.h | File | 716 B | 0644 |
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spectre.h | File | 906 B | 0644 |
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spinlock.h | File | 5.49 KB | 0644 |
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spinlock_types.h | File | 541 B | 0644 |
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stackprotector.h | File | 1.09 KB | 0644 |
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stacktrace.h | File | 742 B | 0644 |
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stage2_pgtable.h | File | 2.12 KB | 0644 |
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string.h | File | 1.43 KB | 0644 |
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suspend.h | File | 369 B | 0644 |
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swab.h | File | 1005 B | 0644 |
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switch_to.h | File | 1.03 KB | 0644 |
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sync_bitops.h | File | 1.03 KB | 0644 |
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syscall.h | File | 2.48 KB | 0644 |
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system_info.h | File | 763 B | 0644 |
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system_misc.h | File | 1.14 KB | 0644 |
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tcm.h | File | 937 B | 0644 |
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therm.h | File | 655 B | 0644 |
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thread_info.h | File | 5.2 KB | 0644 |
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thread_notify.h | File | 1.2 KB | 0644 |
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timex.h | File | 577 B | 0644 |
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tlb.h | File | 7.37 KB | 0644 |
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tlbflush.h | File | 17.88 KB | 0644 |
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tls.h | File | 3.09 KB | 0644 |
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topology.h | File | 1.18 KB | 0644 |
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traps.h | File | 1.17 KB | 0644 |
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trusted_foundations.h | File | 2.29 KB | 0644 |
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uaccess-asm.h | File | 2.83 KB | 0644 |
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uaccess.h | File | 16.22 KB | 0644 |
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ucontext.h | File | 2.98 KB | 0644 |
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unaligned.h | File | 846 B | 0644 |
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unified.h | File | 1.61 KB | 0644 |
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unistd.h | File | 1.68 KB | 0644 |
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unwind.h | File | 1.71 KB | 0644 |
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uprobes.h | File | 1.07 KB | 0644 |
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user.h | File | 4.2 KB | 0644 |
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v7m.h | File | 2.93 KB | 0644 |
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vdso.h | File | 507 B | 0644 |
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vdso_datapage.h | File | 1.69 KB | 0644 |
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vfp.h | File | 2.86 KB | 0644 |
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vfpmacros.h | File | 2.1 KB | 0644 |
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vga.h | File | 305 B | 0644 |
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virt.h | File | 2.9 KB | 0644 |
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word-at-a-time.h | File | 2.08 KB | 0644 |
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xor.h | File | 5.22 KB | 0644 |
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