[mirror_ubuntu-disco-kernel.git] / arch / ia64 / kernel / pci-dma.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Dynamic DMA mapping support.
 */

#include <linux/types.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <linux/pci.h>
#include <linux/module.h>
#include <linux/dmar.h>
#include <asm/iommu.h>
#include <asm/machvec.h>
#include <linux/dma-mapping.h>
#include <linux/kernel.h>
#include <asm/page.h>

int no_iommu __read_mostly;
#ifdef CONFIG_IOMMU_DEBUG
int force_iommu __read_mostly = 1;
#else
int force_iommu __read_mostly;
#endif

int iommu_pass_through;

static int __init pci_iommu_init(void)
{
	if (iommu_detected)
		intel_iommu_init();

	return 0;
}

/* Must execute after PCI subsystem */
fs_initcall(pci_iommu_init);

void __init pci_iommu_alloc(void)
{
	/*
	 * The order of these functions is important for
	 * fall-back/fail-over reasons
	 */
	detect_intel_iommu();

#ifdef CONFIG_SWIOTLB
	if (!iommu_detected) {
#ifdef CONFIG_IA64_GENERIC
		printk(KERN_INFO "PCI-DMA: Re-initialize machine vector.\n");
		machvec_init("dig");
		swiotlb_dma_init();
#else
		panic("Unable to find Intel IOMMU");
#endif /* CONFIG_IA64_GENERIC */
	}
#endif /* CONFIG_SWIOTLB */
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
62fdd767 FY	2	/*
	3	* Dynamic DMA mapping support.
	4	*/
	5
	6	#include <linux/types.h>
	7	#include <linux/mm.h>
	8	#include <linux/string.h>
	9	#include <linux/pci.h>
	10	#include <linux/module.h>
	11	#include <linux/dmar.h>
	12	#include <asm/iommu.h>
	13	#include <asm/machvec.h>
	14	#include <linux/dma-mapping.h>
62fdd767	15	#include <linux/kernel.h>
62fdd767	16	#include <asm/page.h>
62fdd767	17
62fdd767 FY	18	int no_iommu __read_mostly;
	19	#ifdef CONFIG_IOMMU_DEBUG
	20	int force_iommu __read_mostly = 1;
	21	#else
	22	int force_iommu __read_mostly;
	23	#endif
	24
aed5d5f4 FY	25	int iommu_pass_through;
aed5d5f4 FY	26
62fdd767 FY	27	static int __init pci_iommu_init(void)
	28	{
	29	if (iommu_detected)
	30	intel_iommu_init();
	31
	32	return 0;
	33	}
	34
	35	/* Must execute after PCI subsystem */
	36	fs_initcall(pci_iommu_init);
	37
160c1d8e FT	38	void __init pci_iommu_alloc(void)
160c1d8e FT	39	{
160c1d8e FT	40	/*
	41	* The order of these functions is important for
	42	* fall-back/fail-over reasons
	43	*/
	44	detect_intel_iommu();
	45
	46	#ifdef CONFIG_SWIOTLB
4fac8076 CH	47	if (!iommu_detected) {
	48	#ifdef CONFIG_IA64_GENERIC
	49	printk(KERN_INFO "PCI-DMA: Re-initialize machine vector.\n");
	50	machvec_init("dig");
	51	swiotlb_dma_init();
	52	#else
	53	panic("Unable to find Intel IOMMU");
	54	#endif /* CONFIG_IA64_GENERIC */
	55	}
	56	#endif /* CONFIG_SWIOTLB */
160c1d8e	57	}