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https://github.com/tbsdtv/linux_media.git
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974f83ec1e
ia64 currently organizes the iommu probing along machves, which isn't very helpful. Instead just try to probe for Intel IOMMUs in mem_init as they are properly described in ACPI and if none was found initialize the swiotlb buffer. The HP SBA handling is then only done delayed when the actual hardware is probed. Only in the case that we actually found usable IOMMUs we then set up the DMA ops and free the not needed swiotlb buffer. This scheme gets rid of the need for the dma_init machvec operation, and the dig_vtd machvec. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lkml.kernel.org/r/20190813072514.23299-24-hch@lst.de Signed-off-by: Tony Luck <tony.luck@intel.com>
126 lines
3.0 KiB
C
126 lines
3.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 1999 VA Linux Systems
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* Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
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* Copyright (C) 2000,2001 J.I. Lee <jung-ik.lee@intel.com>
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* Copyright (C) 2001,2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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*/
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#ifndef _ASM_ACPI_H
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#define _ASM_ACPI_H
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#ifdef __KERNEL__
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#include <acpi/pdc_intel.h>
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#include <linux/init.h>
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#include <linux/numa.h>
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#include <asm/numa.h>
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extern int acpi_lapic;
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#define acpi_disabled 0 /* ACPI always enabled on IA64 */
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#define acpi_noirq 0 /* ACPI always enabled on IA64 */
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#define acpi_pci_disabled 0 /* ACPI PCI always enabled on IA64 */
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#define acpi_strict 1 /* no ACPI spec workarounds on IA64 */
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static inline bool acpi_has_cpu_in_madt(void)
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{
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return !!acpi_lapic;
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}
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#define acpi_processor_cstate_check(x) (x) /* no idle limits on IA64 :) */
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static inline void disable_acpi(void) { }
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#ifdef CONFIG_IA64_GENERIC
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const char *acpi_get_sysname (void);
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#else
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static inline const char *acpi_get_sysname (void)
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{
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# if defined (CONFIG_IA64_HP_ZX1)
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return "hpzx1";
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# elif defined (CONFIG_IA64_SGI_UV)
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return "uv";
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# elif defined (CONFIG_IA64_DIG)
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return "dig";
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# else
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# error Unknown platform. Fix acpi.c.
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# endif
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}
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#endif
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int acpi_request_vector (u32 int_type);
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int acpi_gsi_to_irq (u32 gsi, unsigned int *irq);
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/* Low-level suspend routine. */
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extern int acpi_suspend_lowlevel(void);
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extern unsigned long acpi_wakeup_address;
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/*
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* Record the cpei override flag and current logical cpu. This is
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* useful for CPU removal.
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*/
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extern unsigned int can_cpei_retarget(void);
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extern unsigned int is_cpu_cpei_target(unsigned int cpu);
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extern void set_cpei_target_cpu(unsigned int cpu);
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extern unsigned int get_cpei_target_cpu(void);
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extern void prefill_possible_map(void);
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#ifdef CONFIG_ACPI_HOTPLUG_CPU
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extern int additional_cpus;
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#else
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#define additional_cpus 0
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#endif
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#ifdef CONFIG_ACPI_NUMA
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#if MAX_NUMNODES > 256
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#define MAX_PXM_DOMAINS MAX_NUMNODES
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#else
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#define MAX_PXM_DOMAINS (256)
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#endif
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extern int pxm_to_nid_map[MAX_PXM_DOMAINS];
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extern int __initdata nid_to_pxm_map[MAX_NUMNODES];
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#endif
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static inline bool arch_has_acpi_pdc(void) { return true; }
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static inline void arch_acpi_set_pdc_bits(u32 *buf)
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{
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buf[2] |= ACPI_PDC_EST_CAPABILITY_SMP;
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}
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#define acpi_unlazy_tlb(x)
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#ifdef CONFIG_ACPI_NUMA
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extern cpumask_t early_cpu_possible_map;
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#define for_each_possible_early_cpu(cpu) \
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for_each_cpu((cpu), &early_cpu_possible_map)
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static inline void per_cpu_scan_finalize(int min_cpus, int reserve_cpus)
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{
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int low_cpu, high_cpu;
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int cpu;
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int next_nid = 0;
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low_cpu = cpumask_weight(&early_cpu_possible_map);
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high_cpu = max(low_cpu, min_cpus);
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high_cpu = min(high_cpu + reserve_cpus, NR_CPUS);
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for (cpu = low_cpu; cpu < high_cpu; cpu++) {
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cpumask_set_cpu(cpu, &early_cpu_possible_map);
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if (node_cpuid[cpu].nid == NUMA_NO_NODE) {
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node_cpuid[cpu].nid = next_nid;
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next_nid++;
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if (next_nid >= num_online_nodes())
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next_nid = 0;
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}
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}
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}
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extern void acpi_numa_fixup(void);
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#endif /* CONFIG_ACPI_NUMA */
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#endif /*__KERNEL__*/
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#endif /*_ASM_ACPI_H*/
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