iommu: Remove ioasid infrastructure

This has no use anymore, delete it all.
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Link: https://lore.kernel.org/r/20230322200803.869130-8-jacob.jun.pan@linux.intel.comSigned-off-by: Joerg Roedel <jroedel@suse.de>

drivers/dma/idxd/idxd.h

@@ -10,7 +10,6 @@
 #include <linux/cdev.h>
 #include <linux/idr.h>
 #include <linux/pci.h>
-#include <linux/ioasid.h>
 #include <linux/bitmap.h>
 #include <linux/perf_event.h>
 #include <linux/iommu.h>

drivers/iommu/Kconfig

@@ -3,10 +3,6 @@
 config IOMMU_IOVA
 	tristate
 
-# The IOASID library may also be used by non-IOMMU_API users
-config IOASID
-	tristate
-
 # IOMMU_API always gets selected by whoever wants it.
 config IOMMU_API
 	bool
@@ -160,7 +156,6 @@ config IOMMU_DMA
 # Shared Virtual Addressing
 config IOMMU_SVA
 	bool
-	select IOASID
 
 config FSL_PAMU
 	bool "Freescale IOMMU support"

drivers/iommu/Makefile

@@ -9,7 +9,6 @@ obj-$(CONFIG_IOMMU_IO_PGTABLE) += io-pgtable.o
 obj-$(CONFIG_IOMMU_IO_PGTABLE_ARMV7S) += io-pgtable-arm-v7s.o
 obj-$(CONFIG_IOMMU_IO_PGTABLE_LPAE) += io-pgtable-arm.o
 obj-$(CONFIG_IOMMU_IO_PGTABLE_DART) += io-pgtable-dart.o
-obj-$(CONFIG_IOASID) += ioasid.o
 obj-$(CONFIG_IOMMU_IOVA) += iova.o
 obj-$(CONFIG_OF_IOMMU)	+= of_iommu.o
 obj-$(CONFIG_MSM_IOMMU) += msm_iommu.o

drivers/iommu/intel/iommu.h

@@ -19,7 +19,6 @@
 #include <linux/iommu.h>
 #include <linux/io-64-nonatomic-lo-hi.h>
 #include <linux/dmar.h>
-#include <linux/ioasid.h>
 #include <linux/bitfield.h>
 #include <linux/xarray.h>
 #include <linux/perf_event.h>

drivers/iommu/intel/svm.c

@@ -16,7 +16,6 @@
 #include <linux/interrupt.h>
 #include <linux/mm_types.h>
 #include <linux/xarray.h>
-#include <linux/ioasid.h>
 #include <asm/page.h>
 #include <asm/fpu/api.h>
 

drivers/iommu/iommu-sva.h

@@ -5,7 +5,6 @@
 #ifndef _IOMMU_SVA_H
 #define _IOMMU_SVA_H
 
-#include <linux/ioasid.h>
 #include <linux/mm_types.h>
 
 /* I/O Page fault */

include/linux/ioasid.h

-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __LINUX_IOASID_H
-#define __LINUX_IOASID_H
-
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/iommu.h>
-
-typedef unsigned int ioasid_t;
-#define INVALID_IOASID ((ioasid_t)-1)
-typedef ioasid_t (*ioasid_alloc_fn_t)(ioasid_t min, ioasid_t max, void *data);
-typedef void (*ioasid_free_fn_t)(ioasid_t ioasid, void *data);
-
-struct ioasid_set {
-	int dummy;
-};
-
-/**
- * struct ioasid_allocator_ops - IOASID allocator helper functions and data
- *
- * @alloc:	helper function to allocate IOASID
- * @free:	helper function to free IOASID
- * @list:	for tracking ops that share helper functions but not data
- * @pdata:	data belong to the allocator, provided when calling alloc()
- */
-struct ioasid_allocator_ops {
-	ioasid_alloc_fn_t alloc;
-	ioasid_free_fn_t free;
-	struct list_head list;
-	void *pdata;
-};
-
-#define DECLARE_IOASID_SET(name) struct ioasid_set name = { 0 }
-
-#if IS_ENABLED(CONFIG_IOASID)
-ioasid_t ioasid_alloc(struct ioasid_set *set, ioasid_t min, ioasid_t max,
-		      void *private);
-void ioasid_free(ioasid_t ioasid);
-void *ioasid_find(struct ioasid_set *set, ioasid_t ioasid,
-		  bool (*getter)(void *));
-int ioasid_register_allocator(struct ioasid_allocator_ops *allocator);
-void ioasid_unregister_allocator(struct ioasid_allocator_ops *allocator);
-int ioasid_set_data(ioasid_t ioasid, void *data);
-
-#else /* !CONFIG_IOASID */
-static inline ioasid_t ioasid_alloc(struct ioasid_set *set, ioasid_t min,
-				    ioasid_t max, void *private)
-{
-	return INVALID_IOASID;
-}
-
-static inline void ioasid_free(ioasid_t ioasid) { }
-
-static inline void *ioasid_find(struct ioasid_set *set, ioasid_t ioasid,
-				bool (*getter)(void *))
-{
-	return NULL;
-}
-
-static inline int ioasid_register_allocator(struct ioasid_allocator_ops *allocator)
-{
-	return -ENOTSUPP;
-}
-
-static inline void ioasid_unregister_allocator(struct ioasid_allocator_ops *allocator)
-{
-}
-
-static inline int ioasid_set_data(ioasid_t ioasid, void *data)
-{
-	return -ENOTSUPP;
-}
-
-#endif /* CONFIG_IOASID */
-#endif /* __LINUX_IOASID_H */