obj-$(CONFIG_S390_IOMMU) += s390-iommu.o
obj-$(CONFIG_HYPERV_IOMMU) += hyperv-iommu.o
obj-$(CONFIG_VIRTIO_IOMMU) += virtio-iommu.o
-obj-$(CONFIG_IOMMU_SVA) += iommu-sva-lib.o io-pgfault.o
+obj-$(CONFIG_IOMMU_SVA) += iommu-sva.o io-pgfault.o
obj-$(CONFIG_SPRD_IOMMU) += sprd-iommu.o
obj-$(CONFIG_APPLE_DART) += apple-dart.o
#include <linux/slab.h>
#include "arm-smmu-v3.h"
-#include "../../iommu-sva-lib.h"
+#include "../../iommu-sva.h"
#include "../../io-pgtable-arm.h"
struct arm_smmu_mmu_notifier {
#include "arm-smmu-v3.h"
#include "../../dma-iommu.h"
-#include "../../iommu-sva-lib.h"
+#include "../../iommu-sva.h"
static bool disable_bypass = true;
module_param(disable_bypass, bool, 0444);
#include "iommu.h"
#include "../dma-iommu.h"
#include "../irq_remapping.h"
-#include "../iommu-sva-lib.h"
+#include "../iommu-sva.h"
#include "pasid.h"
#include "cap_audit.h"
#include "iommu.h"
#include "pasid.h"
#include "perf.h"
-#include "../iommu-sva-lib.h"
+#include "../iommu-sva.h"
#include "trace.h"
static irqreturn_t prq_event_thread(int irq, void *d);
#include <linux/slab.h>
#include <linux/workqueue.h>
-#include "iommu-sva-lib.h"
+#include "iommu-sva.h"
/**
* struct iopf_queue - IO Page Fault queue
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Helpers for IOMMU drivers implementing SVA
- */
-#include <linux/mutex.h>
-#include <linux/sched/mm.h>
-#include <linux/iommu.h>
-
-#include "iommu-sva-lib.h"
-
-static DEFINE_MUTEX(iommu_sva_lock);
-static DECLARE_IOASID_SET(iommu_sva_pasid);
-
-/**
- * iommu_sva_alloc_pasid - Allocate a PASID for the mm
- * @mm: the mm
- * @min: minimum PASID value (inclusive)
- * @max: maximum PASID value (inclusive)
- *
- * Try to allocate a PASID for this mm, or take a reference to the existing one
- * provided it fits within the [@min, @max] range. On success the PASID is
- * available in mm->pasid and will be available for the lifetime of the mm.
- *
- * Returns 0 on success and < 0 on error.
- */
-int iommu_sva_alloc_pasid(struct mm_struct *mm, ioasid_t min, ioasid_t max)
-{
- int ret = 0;
- ioasid_t pasid;
-
- if (min == INVALID_IOASID || max == INVALID_IOASID ||
- min == 0 || max < min)
- return -EINVAL;
-
- mutex_lock(&iommu_sva_lock);
- /* Is a PASID already associated with this mm? */
- if (pasid_valid(mm->pasid)) {
- if (mm->pasid < min || mm->pasid >= max)
- ret = -EOVERFLOW;
- goto out;
- }
-
- pasid = ioasid_alloc(&iommu_sva_pasid, min, max, mm);
- if (!pasid_valid(pasid))
- ret = -ENOMEM;
- else
- mm_pasid_set(mm, pasid);
-out:
- mutex_unlock(&iommu_sva_lock);
- return ret;
-}
-EXPORT_SYMBOL_GPL(iommu_sva_alloc_pasid);
-
-/* ioasid_find getter() requires a void * argument */
-static bool __mmget_not_zero(void *mm)
-{
- return mmget_not_zero(mm);
-}
-
-/**
- * iommu_sva_find() - Find mm associated to the given PASID
- * @pasid: Process Address Space ID assigned to the mm
- *
- * On success a reference to the mm is taken, and must be released with mmput().
- *
- * Returns the mm corresponding to this PASID, or an error if not found.
- */
-struct mm_struct *iommu_sva_find(ioasid_t pasid)
-{
- return ioasid_find(&iommu_sva_pasid, pasid, __mmget_not_zero);
-}
-EXPORT_SYMBOL_GPL(iommu_sva_find);
-
-/**
- * iommu_sva_bind_device() - Bind a process address space to a device
- * @dev: the device
- * @mm: the mm to bind, caller must hold a reference to mm_users
- *
- * Create a bond between device and address space, allowing the device to
- * access the mm using the PASID returned by iommu_sva_get_pasid(). If a
- * bond already exists between @device and @mm, an additional internal
- * reference is taken. Caller must call iommu_sva_unbind_device()
- * to release each reference.
- *
- * iommu_dev_enable_feature(dev, IOMMU_DEV_FEAT_SVA) must be called first, to
- * initialize the required SVA features.
- *
- * On error, returns an ERR_PTR value.
- */
-struct iommu_sva *iommu_sva_bind_device(struct device *dev, struct mm_struct *mm)
-{
- struct iommu_domain *domain;
- struct iommu_sva *handle;
- ioasid_t max_pasids;
- int ret;
-
- max_pasids = dev->iommu->max_pasids;
- if (!max_pasids)
- return ERR_PTR(-EOPNOTSUPP);
-
- /* Allocate mm->pasid if necessary. */
- ret = iommu_sva_alloc_pasid(mm, 1, max_pasids - 1);
- if (ret)
- return ERR_PTR(ret);
-
- handle = kzalloc(sizeof(*handle), GFP_KERNEL);
- if (!handle)
- return ERR_PTR(-ENOMEM);
-
- mutex_lock(&iommu_sva_lock);
- /* Search for an existing domain. */
- domain = iommu_get_domain_for_dev_pasid(dev, mm->pasid,
- IOMMU_DOMAIN_SVA);
- if (IS_ERR(domain)) {
- ret = PTR_ERR(domain);
- goto out_unlock;
- }
-
- if (domain) {
- domain->users++;
- goto out;
- }
-
- /* Allocate a new domain and set it on device pasid. */
- domain = iommu_sva_domain_alloc(dev, mm);
- if (!domain) {
- ret = -ENOMEM;
- goto out_unlock;
- }
-
- ret = iommu_attach_device_pasid(domain, dev, mm->pasid);
- if (ret)
- goto out_free_domain;
- domain->users = 1;
-out:
- mutex_unlock(&iommu_sva_lock);
- handle->dev = dev;
- handle->domain = domain;
-
- return handle;
-
-out_free_domain:
- iommu_domain_free(domain);
-out_unlock:
- mutex_unlock(&iommu_sva_lock);
- kfree(handle);
-
- return ERR_PTR(ret);
-}
-EXPORT_SYMBOL_GPL(iommu_sva_bind_device);
-
-/**
- * iommu_sva_unbind_device() - Remove a bond created with iommu_sva_bind_device
- * @handle: the handle returned by iommu_sva_bind_device()
- *
- * Put reference to a bond between device and address space. The device should
- * not be issuing any more transaction for this PASID. All outstanding page
- * requests for this PASID must have been flushed to the IOMMU.
- */
-void iommu_sva_unbind_device(struct iommu_sva *handle)
-{
- struct iommu_domain *domain = handle->domain;
- ioasid_t pasid = domain->mm->pasid;
- struct device *dev = handle->dev;
-
- mutex_lock(&iommu_sva_lock);
- if (--domain->users == 0) {
- iommu_detach_device_pasid(domain, dev, pasid);
- iommu_domain_free(domain);
- }
- mutex_unlock(&iommu_sva_lock);
- kfree(handle);
-}
-EXPORT_SYMBOL_GPL(iommu_sva_unbind_device);
-
-u32 iommu_sva_get_pasid(struct iommu_sva *handle)
-{
- struct iommu_domain *domain = handle->domain;
-
- return domain->mm->pasid;
-}
-EXPORT_SYMBOL_GPL(iommu_sva_get_pasid);
-
-/*
- * I/O page fault handler for SVA
- */
-enum iommu_page_response_code
-iommu_sva_handle_iopf(struct iommu_fault *fault, void *data)
-{
- vm_fault_t ret;
- struct vm_area_struct *vma;
- struct mm_struct *mm = data;
- unsigned int access_flags = 0;
- unsigned int fault_flags = FAULT_FLAG_REMOTE;
- struct iommu_fault_page_request *prm = &fault->prm;
- enum iommu_page_response_code status = IOMMU_PAGE_RESP_INVALID;
-
- if (!(prm->flags & IOMMU_FAULT_PAGE_REQUEST_PASID_VALID))
- return status;
-
- if (!mmget_not_zero(mm))
- return status;
-
- mmap_read_lock(mm);
-
- vma = find_extend_vma(mm, prm->addr);
- if (!vma)
- /* Unmapped area */
- goto out_put_mm;
-
- if (prm->perm & IOMMU_FAULT_PERM_READ)
- access_flags |= VM_READ;
-
- if (prm->perm & IOMMU_FAULT_PERM_WRITE) {
- access_flags |= VM_WRITE;
- fault_flags |= FAULT_FLAG_WRITE;
- }
-
- if (prm->perm & IOMMU_FAULT_PERM_EXEC) {
- access_flags |= VM_EXEC;
- fault_flags |= FAULT_FLAG_INSTRUCTION;
- }
-
- if (!(prm->perm & IOMMU_FAULT_PERM_PRIV))
- fault_flags |= FAULT_FLAG_USER;
-
- if (access_flags & ~vma->vm_flags)
- /* Access fault */
- goto out_put_mm;
-
- ret = handle_mm_fault(vma, prm->addr, fault_flags, NULL);
- status = ret & VM_FAULT_ERROR ? IOMMU_PAGE_RESP_INVALID :
- IOMMU_PAGE_RESP_SUCCESS;
-
-out_put_mm:
- mmap_read_unlock(mm);
- mmput(mm);
-
- return status;
-}
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * SVA library for IOMMU drivers
- */
-#ifndef _IOMMU_SVA_LIB_H
-#define _IOMMU_SVA_LIB_H
-
-#include <linux/ioasid.h>
-#include <linux/mm_types.h>
-
-int iommu_sva_alloc_pasid(struct mm_struct *mm, ioasid_t min, ioasid_t max);
-struct mm_struct *iommu_sva_find(ioasid_t pasid);
-
-/* I/O Page fault */
-struct device;
-struct iommu_fault;
-struct iopf_queue;
-
-#ifdef CONFIG_IOMMU_SVA
-int iommu_queue_iopf(struct iommu_fault *fault, void *cookie);
-
-int iopf_queue_add_device(struct iopf_queue *queue, struct device *dev);
-int iopf_queue_remove_device(struct iopf_queue *queue,
- struct device *dev);
-int iopf_queue_flush_dev(struct device *dev);
-struct iopf_queue *iopf_queue_alloc(const char *name);
-void iopf_queue_free(struct iopf_queue *queue);
-int iopf_queue_discard_partial(struct iopf_queue *queue);
-enum iommu_page_response_code
-iommu_sva_handle_iopf(struct iommu_fault *fault, void *data);
-
-#else /* CONFIG_IOMMU_SVA */
-static inline int iommu_queue_iopf(struct iommu_fault *fault, void *cookie)
-{
- return -ENODEV;
-}
-
-static inline int iopf_queue_add_device(struct iopf_queue *queue,
- struct device *dev)
-{
- return -ENODEV;
-}
-
-static inline int iopf_queue_remove_device(struct iopf_queue *queue,
- struct device *dev)
-{
- return -ENODEV;
-}
-
-static inline int iopf_queue_flush_dev(struct device *dev)
-{
- return -ENODEV;
-}
-
-static inline struct iopf_queue *iopf_queue_alloc(const char *name)
-{
- return NULL;
-}
-
-static inline void iopf_queue_free(struct iopf_queue *queue)
-{
-}
-
-static inline int iopf_queue_discard_partial(struct iopf_queue *queue)
-{
- return -ENODEV;
-}
-
-static inline enum iommu_page_response_code
-iommu_sva_handle_iopf(struct iommu_fault *fault, void *data)
-{
- return IOMMU_PAGE_RESP_INVALID;
-}
-#endif /* CONFIG_IOMMU_SVA */
-#endif /* _IOMMU_SVA_LIB_H */
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Helpers for IOMMU drivers implementing SVA
+ */
+#include <linux/mutex.h>
+#include <linux/sched/mm.h>
+#include <linux/iommu.h>
+
+#include "iommu-sva.h"
+
+static DEFINE_MUTEX(iommu_sva_lock);
+static DECLARE_IOASID_SET(iommu_sva_pasid);
+
+/**
+ * iommu_sva_alloc_pasid - Allocate a PASID for the mm
+ * @mm: the mm
+ * @min: minimum PASID value (inclusive)
+ * @max: maximum PASID value (inclusive)
+ *
+ * Try to allocate a PASID for this mm, or take a reference to the existing one
+ * provided it fits within the [@min, @max] range. On success the PASID is
+ * available in mm->pasid and will be available for the lifetime of the mm.
+ *
+ * Returns 0 on success and < 0 on error.
+ */
+int iommu_sva_alloc_pasid(struct mm_struct *mm, ioasid_t min, ioasid_t max)
+{
+ int ret = 0;
+ ioasid_t pasid;
+
+ if (min == INVALID_IOASID || max == INVALID_IOASID ||
+ min == 0 || max < min)
+ return -EINVAL;
+
+ mutex_lock(&iommu_sva_lock);
+ /* Is a PASID already associated with this mm? */
+ if (pasid_valid(mm->pasid)) {
+ if (mm->pasid < min || mm->pasid >= max)
+ ret = -EOVERFLOW;
+ goto out;
+ }
+
+ pasid = ioasid_alloc(&iommu_sva_pasid, min, max, mm);
+ if (!pasid_valid(pasid))
+ ret = -ENOMEM;
+ else
+ mm_pasid_set(mm, pasid);
+out:
+ mutex_unlock(&iommu_sva_lock);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(iommu_sva_alloc_pasid);
+
+/* ioasid_find getter() requires a void * argument */
+static bool __mmget_not_zero(void *mm)
+{
+ return mmget_not_zero(mm);
+}
+
+/**
+ * iommu_sva_find() - Find mm associated to the given PASID
+ * @pasid: Process Address Space ID assigned to the mm
+ *
+ * On success a reference to the mm is taken, and must be released with mmput().
+ *
+ * Returns the mm corresponding to this PASID, or an error if not found.
+ */
+struct mm_struct *iommu_sva_find(ioasid_t pasid)
+{
+ return ioasid_find(&iommu_sva_pasid, pasid, __mmget_not_zero);
+}
+EXPORT_SYMBOL_GPL(iommu_sva_find);
+
+/**
+ * iommu_sva_bind_device() - Bind a process address space to a device
+ * @dev: the device
+ * @mm: the mm to bind, caller must hold a reference to mm_users
+ *
+ * Create a bond between device and address space, allowing the device to
+ * access the mm using the PASID returned by iommu_sva_get_pasid(). If a
+ * bond already exists between @device and @mm, an additional internal
+ * reference is taken. Caller must call iommu_sva_unbind_device()
+ * to release each reference.
+ *
+ * iommu_dev_enable_feature(dev, IOMMU_DEV_FEAT_SVA) must be called first, to
+ * initialize the required SVA features.
+ *
+ * On error, returns an ERR_PTR value.
+ */
+struct iommu_sva *iommu_sva_bind_device(struct device *dev, struct mm_struct *mm)
+{
+ struct iommu_domain *domain;
+ struct iommu_sva *handle;
+ ioasid_t max_pasids;
+ int ret;
+
+ max_pasids = dev->iommu->max_pasids;
+ if (!max_pasids)
+ return ERR_PTR(-EOPNOTSUPP);
+
+ /* Allocate mm->pasid if necessary. */
+ ret = iommu_sva_alloc_pasid(mm, 1, max_pasids - 1);
+ if (ret)
+ return ERR_PTR(ret);
+
+ handle = kzalloc(sizeof(*handle), GFP_KERNEL);
+ if (!handle)
+ return ERR_PTR(-ENOMEM);
+
+ mutex_lock(&iommu_sva_lock);
+ /* Search for an existing domain. */
+ domain = iommu_get_domain_for_dev_pasid(dev, mm->pasid,
+ IOMMU_DOMAIN_SVA);
+ if (IS_ERR(domain)) {
+ ret = PTR_ERR(domain);
+ goto out_unlock;
+ }
+
+ if (domain) {
+ domain->users++;
+ goto out;
+ }
+
+ /* Allocate a new domain and set it on device pasid. */
+ domain = iommu_sva_domain_alloc(dev, mm);
+ if (!domain) {
+ ret = -ENOMEM;
+ goto out_unlock;
+ }
+
+ ret = iommu_attach_device_pasid(domain, dev, mm->pasid);
+ if (ret)
+ goto out_free_domain;
+ domain->users = 1;
+out:
+ mutex_unlock(&iommu_sva_lock);
+ handle->dev = dev;
+ handle->domain = domain;
+
+ return handle;
+
+out_free_domain:
+ iommu_domain_free(domain);
+out_unlock:
+ mutex_unlock(&iommu_sva_lock);
+ kfree(handle);
+
+ return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(iommu_sva_bind_device);
+
+/**
+ * iommu_sva_unbind_device() - Remove a bond created with iommu_sva_bind_device
+ * @handle: the handle returned by iommu_sva_bind_device()
+ *
+ * Put reference to a bond between device and address space. The device should
+ * not be issuing any more transaction for this PASID. All outstanding page
+ * requests for this PASID must have been flushed to the IOMMU.
+ */
+void iommu_sva_unbind_device(struct iommu_sva *handle)
+{
+ struct iommu_domain *domain = handle->domain;
+ ioasid_t pasid = domain->mm->pasid;
+ struct device *dev = handle->dev;
+
+ mutex_lock(&iommu_sva_lock);
+ if (--domain->users == 0) {
+ iommu_detach_device_pasid(domain, dev, pasid);
+ iommu_domain_free(domain);
+ }
+ mutex_unlock(&iommu_sva_lock);
+ kfree(handle);
+}
+EXPORT_SYMBOL_GPL(iommu_sva_unbind_device);
+
+u32 iommu_sva_get_pasid(struct iommu_sva *handle)
+{
+ struct iommu_domain *domain = handle->domain;
+
+ return domain->mm->pasid;
+}
+EXPORT_SYMBOL_GPL(iommu_sva_get_pasid);
+
+/*
+ * I/O page fault handler for SVA
+ */
+enum iommu_page_response_code
+iommu_sva_handle_iopf(struct iommu_fault *fault, void *data)
+{
+ vm_fault_t ret;
+ struct vm_area_struct *vma;
+ struct mm_struct *mm = data;
+ unsigned int access_flags = 0;
+ unsigned int fault_flags = FAULT_FLAG_REMOTE;
+ struct iommu_fault_page_request *prm = &fault->prm;
+ enum iommu_page_response_code status = IOMMU_PAGE_RESP_INVALID;
+
+ if (!(prm->flags & IOMMU_FAULT_PAGE_REQUEST_PASID_VALID))
+ return status;
+
+ if (!mmget_not_zero(mm))
+ return status;
+
+ mmap_read_lock(mm);
+
+ vma = find_extend_vma(mm, prm->addr);
+ if (!vma)
+ /* Unmapped area */
+ goto out_put_mm;
+
+ if (prm->perm & IOMMU_FAULT_PERM_READ)
+ access_flags |= VM_READ;
+
+ if (prm->perm & IOMMU_FAULT_PERM_WRITE) {
+ access_flags |= VM_WRITE;
+ fault_flags |= FAULT_FLAG_WRITE;
+ }
+
+ if (prm->perm & IOMMU_FAULT_PERM_EXEC) {
+ access_flags |= VM_EXEC;
+ fault_flags |= FAULT_FLAG_INSTRUCTION;
+ }
+
+ if (!(prm->perm & IOMMU_FAULT_PERM_PRIV))
+ fault_flags |= FAULT_FLAG_USER;
+
+ if (access_flags & ~vma->vm_flags)
+ /* Access fault */
+ goto out_put_mm;
+
+ ret = handle_mm_fault(vma, prm->addr, fault_flags, NULL);
+ status = ret & VM_FAULT_ERROR ? IOMMU_PAGE_RESP_INVALID :
+ IOMMU_PAGE_RESP_SUCCESS;
+
+out_put_mm:
+ mmap_read_unlock(mm);
+ mmput(mm);
+
+ return status;
+}
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * SVA library for IOMMU drivers
+ */
+#ifndef _IOMMU_SVA_H
+#define _IOMMU_SVA_H
+
+#include <linux/ioasid.h>
+#include <linux/mm_types.h>
+
+int iommu_sva_alloc_pasid(struct mm_struct *mm, ioasid_t min, ioasid_t max);
+struct mm_struct *iommu_sva_find(ioasid_t pasid);
+
+/* I/O Page fault */
+struct device;
+struct iommu_fault;
+struct iopf_queue;
+
+#ifdef CONFIG_IOMMU_SVA
+int iommu_queue_iopf(struct iommu_fault *fault, void *cookie);
+
+int iopf_queue_add_device(struct iopf_queue *queue, struct device *dev);
+int iopf_queue_remove_device(struct iopf_queue *queue,
+ struct device *dev);
+int iopf_queue_flush_dev(struct device *dev);
+struct iopf_queue *iopf_queue_alloc(const char *name);
+void iopf_queue_free(struct iopf_queue *queue);
+int iopf_queue_discard_partial(struct iopf_queue *queue);
+enum iommu_page_response_code
+iommu_sva_handle_iopf(struct iommu_fault *fault, void *data);
+
+#else /* CONFIG_IOMMU_SVA */
+static inline int iommu_queue_iopf(struct iommu_fault *fault, void *cookie)
+{
+ return -ENODEV;
+}
+
+static inline int iopf_queue_add_device(struct iopf_queue *queue,
+ struct device *dev)
+{
+ return -ENODEV;
+}
+
+static inline int iopf_queue_remove_device(struct iopf_queue *queue,
+ struct device *dev)
+{
+ return -ENODEV;
+}
+
+static inline int iopf_queue_flush_dev(struct device *dev)
+{
+ return -ENODEV;
+}
+
+static inline struct iopf_queue *iopf_queue_alloc(const char *name)
+{
+ return NULL;
+}
+
+static inline void iopf_queue_free(struct iopf_queue *queue)
+{
+}
+
+static inline int iopf_queue_discard_partial(struct iopf_queue *queue)
+{
+ return -ENODEV;
+}
+
+static inline enum iommu_page_response_code
+iommu_sva_handle_iopf(struct iommu_fault *fault, void *data)
+{
+ return IOMMU_PAGE_RESP_INVALID;
+}
+#endif /* CONFIG_IOMMU_SVA */
+#endif /* _IOMMU_SVA_H */
#include "dma-iommu.h"
-#include "iommu-sva-lib.h"
+#include "iommu-sva.h"
static struct kset *iommu_group_kset;
static DEFINE_IDA(iommu_group_ida);
projects / platform / kernel / linux-starfive.git / commitdiff