Release 4.14 drivers/iommu/amd_iommu_v2.c
/*
* Copyright (C) 2010-2012 Advanced Micro Devices, Inc.
* Author: Joerg Roedel <jroedel@suse.de>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/mmu_notifier.h>
#include <linux/amd-iommu.h>
#include <linux/mm_types.h>
#include <linux/profile.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/sched/mm.h>
#include <linux/iommu.h>
#include <linux/wait.h>
#include <linux/pci.h>
#include <linux/gfp.h>
#include "amd_iommu_types.h"
#include "amd_iommu_proto.h"
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Joerg Roedel <jroedel@suse.de>");
#define MAX_DEVICES 0x10000
#define PRI_QUEUE_SIZE 512
struct pri_queue {
atomic_t inflight;
bool finish;
int status;
};
struct pasid_state {
struct list_head list; /* For global state-list */
atomic_t count; /* Reference count */
unsigned mmu_notifier_count; /* Counting nested mmu_notifier
calls */
struct mm_struct *mm; /* mm_struct for the faults */
struct mmu_notifier mn; /* mmu_notifier handle */
struct pri_queue pri[PRI_QUEUE_SIZE]; /* PRI tag states */
struct device_state *device_state; /* Link to our device_state */
int pasid; /* PASID index */
bool invalid; /* Used during setup and
teardown of the pasid */
spinlock_t lock; /* Protect pri_queues and
mmu_notifer_count */
wait_queue_head_t wq; /* To wait for count == 0 */
};
struct device_state {
struct list_head list;
u16 devid;
atomic_t count;
struct pci_dev *pdev;
struct pasid_state **states;
struct iommu_domain *domain;
int pasid_levels;
int max_pasids;
amd_iommu_invalid_ppr_cb inv_ppr_cb;
amd_iommu_invalidate_ctx inv_ctx_cb;
spinlock_t lock;
wait_queue_head_t wq;
};
struct fault {
struct work_struct work;
struct device_state *dev_state;
struct pasid_state *state;
struct mm_struct *mm;
u64 address;
u16 devid;
u16 pasid;
u16 tag;
u16 finish;
u16 flags;
};
static LIST_HEAD(state_list);
static spinlock_t state_lock;
static struct workqueue_struct *iommu_wq;
static void free_pasid_states(struct device_state *dev_state);
static u16 device_id(struct pci_dev *pdev)
{
u16 devid;
devid = pdev->bus->number;
devid = (devid << 8) | pdev->devfn;
return devid;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 37 | 100.00% | 1 | 100.00% |
| Total | 37 | 100.00% | 1 | 100.00% |
static struct device_state *__get_device_state(u16 devid)
{
struct device_state *dev_state;
list_for_each_entry(dev_state, &state_list, list) {
if (dev_state->devid == devid)
return dev_state;
}
return NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 40 | 100.00% | 2 | 100.00% |
| Total | 40 | 100.00% | 2 | 100.00% |
static struct device_state *get_device_state(u16 devid)
{
struct device_state *dev_state;
unsigned long flags;
spin_lock_irqsave(&state_lock, flags);
dev_state = __get_device_state(devid);
if (dev_state != NULL)
atomic_inc(&dev_state->count);
spin_unlock_irqrestore(&state_lock, flags);
return dev_state;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 60 | 100.00% | 3 | 100.00% |
| Total | 60 | 100.00% | 3 | 100.00% |
static void free_device_state(struct device_state *dev_state)
{
struct iommu_group *group;
/*
* First detach device from domain - No more PRI requests will arrive
* from that device after it is unbound from the IOMMUv2 domain.
*/
group = iommu_group_get(&dev_state->pdev->dev);
if (WARN_ON(!group))
return;
iommu_detach_group(dev_state->domain, group);
iommu_group_put(group);
/* Everything is down now, free the IOMMUv2 domain */
iommu_domain_free(dev_state->domain);
/* Finally get rid of the device-state */
kfree(dev_state);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 66 | 100.00% | 2 | 100.00% |
| Total | 66 | 100.00% | 2 | 100.00% |
static void put_device_state(struct device_state *dev_state)
{
if (atomic_dec_and_test(&dev_state->count))
wake_up(&dev_state->wq);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 29 | 100.00% | 2 | 100.00% |
| Total | 29 | 100.00% | 2 | 100.00% |
/* Must be called under dev_state->lock */
static struct pasid_state **__get_pasid_state_ptr(struct device_state *dev_state,
int pasid, bool alloc)
{
struct pasid_state **root, **ptr;
int level, index;
level = dev_state->pasid_levels;
root = dev_state->states;
while (true) {
index = (pasid >> (9 * level)) & 0x1ff;
ptr = &root[index];
if (level == 0)
break;
if (*ptr == NULL) {
if (!alloc)
return NULL;
*ptr = (void *)get_zeroed_page(GFP_ATOMIC);
if (*ptr == NULL)
return NULL;
}
root = (struct pasid_state **)*ptr;
level -= 1;
}
return ptr;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 139 | 100.00% | 1 | 100.00% |
| Total | 139 | 100.00% | 1 | 100.00% |
static int set_pasid_state(struct device_state *dev_state,
struct pasid_state *pasid_state,
int pasid)
{
struct pasid_state **ptr;
unsigned long flags;
int ret;
spin_lock_irqsave(&dev_state->lock, flags);
ptr = __get_pasid_state_ptr(dev_state, pasid, true);
ret = -ENOMEM;
if (ptr == NULL)
goto out_unlock;
ret = -ENOMEM;
if (*ptr != NULL)
goto out_unlock;
*ptr = pasid_state;
ret = 0;
out_unlock:
spin_unlock_irqrestore(&dev_state->lock, flags);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 106 | 100.00% | 1 | 100.00% |
| Total | 106 | 100.00% | 1 | 100.00% |
static void clear_pasid_state(struct device_state *dev_state, int pasid)
{
struct pasid_state **ptr;
unsigned long flags;
spin_lock_irqsave(&dev_state->lock, flags);
ptr = __get_pasid_state_ptr(dev_state, pasid, true);
if (ptr == NULL)
goto out_unlock;
*ptr = NULL;
out_unlock:
spin_unlock_irqrestore(&dev_state->lock, flags);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 71 | 100.00% | 1 | 100.00% |
| Total | 71 | 100.00% | 1 | 100.00% |
static struct pasid_state *get_pasid_state(struct device_state *dev_state,
int pasid)
{
struct pasid_state **ptr, *ret = NULL;
unsigned long flags;
spin_lock_irqsave(&dev_state->lock, flags);
ptr = __get_pasid_state_ptr(dev_state, pasid, false);
if (ptr == NULL)
goto out_unlock;
ret = *ptr;
if (ret)
atomic_inc(&ret->count);
out_unlock:
spin_unlock_irqrestore(&dev_state->lock, flags);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 93 | 100.00% | 1 | 100.00% |
| Total | 93 | 100.00% | 1 | 100.00% |
static void free_pasid_state(struct pasid_state *pasid_state)
{
kfree(pasid_state);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
static void put_pasid_state(struct pasid_state *pasid_state)
{
if (atomic_dec_and_test(&pasid_state->count))
wake_up(&pasid_state->wq);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 29 | 100.00% | 2 | 100.00% |
| Total | 29 | 100.00% | 2 | 100.00% |
static void put_pasid_state_wait(struct pasid_state *pasid_state)
{
atomic_dec(&pasid_state->count);
wait_event(pasid_state->wq, !atomic_read(&pasid_state->count));
free_pasid_state(pasid_state);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 31 | 77.50% | 3 | 60.00% |
| Oded Gabbay | 9 | 22.50% | 2 | 40.00% |
| Total | 40 | 100.00% | 5 | 100.00% |
static void unbind_pasid(struct pasid_state *pasid_state)
{
struct iommu_domain *domain;
domain = pasid_state->device_state->domain;
/*
* Mark pasid_state as invalid, no more faults will we added to the
* work queue after this is visible everywhere.
*/
pasid_state->invalid = true;
/* Make sure this is visible */
smp_wmb();
/* After this the device/pasid can't access the mm anymore */
amd_iommu_domain_clear_gcr3(domain, pasid_state->pasid);
/* Make sure no more pending faults are in the queue */
flush_workqueue(iommu_wq);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 51 | 100.00% | 3 | 100.00% |
| Total | 51 | 100.00% | 3 | 100.00% |
static void free_pasid_states_level1(struct pasid_state **tbl)
{
int i;
for (i = 0; i < 512; ++i) {
if (tbl[i] == NULL)
continue;
free_page((unsigned long)tbl[i]);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 52 | 100.00% | 1 | 100.00% |
| Total | 52 | 100.00% | 1 | 100.00% |
static void free_pasid_states_level2(struct pasid_state **tbl)
{
struct pasid_state **ptr;
int i;
for (i = 0; i < 512; ++i) {
if (tbl[i] == NULL)
continue;
ptr = (struct pasid_state **)tbl[i];
free_pasid_states_level1(ptr);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 64 | 100.00% | 1 | 100.00% |
| Total | 64 | 100.00% | 1 | 100.00% |
static void free_pasid_states(struct device_state *dev_state)
{
struct pasid_state *pasid_state;
int i;
for (i = 0; i < dev_state->max_pasids; ++i) {
pasid_state = get_pasid_state(dev_state, i);
if (pasid_state == NULL)
continue;
put_pasid_state(pasid_state);
/*
* This will call the mn_release function and
* unbind the PASID
*/
mmu_notifier_unregister(&pasid_state->mn, pasid_state->mm);
put_pasid_state_wait(pasid_state); /* Reference taken in
amd_iommu_bind_pasid */
/* Drop reference taken in amd_iommu_bind_pasid */
put_device_state(dev_state);
}
if (dev_state->pasid_levels == 2)
free_pasid_states_level2(dev_state->states);
else if (dev_state->pasid_levels == 1)
free_pasid_states_level1(dev_state->states);
else
BUG_ON(dev_state->pasid_levels != 0);
free_page((unsigned long)dev_state->states);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 134 | 100.00% | 8 | 100.00% |
| Total | 134 | 100.00% | 8 | 100.00% |
static struct pasid_state *mn_to_state(struct mmu_notifier *mn)
{
return container_of(mn, struct pasid_state, mn);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 24 | 100.00% | 1 | 100.00% |
| Total | 24 | 100.00% | 1 | 100.00% |
static void __mn_flush_page(struct mmu_notifier *mn,
unsigned long address)
{
struct pasid_state *pasid_state;
struct device_state *dev_state;
pasid_state = mn_to_state(mn);
dev_state = pasid_state->device_state;
amd_iommu_flush_page(dev_state->domain, pasid_state->pasid, address);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 51 | 100.00% | 1 | 100.00% |
| Total | 51 | 100.00% | 1 | 100.00% |
static int mn_clear_flush_young(struct mmu_notifier *mn,
struct mm_struct *mm,
unsigned long start,
unsigned long end)
{
for (; start < end; start += PAGE_SIZE)
__mn_flush_page(mn, start);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 28 | 62.22% | 1 | 50.00% |
| Andres Lagar-Cavilla | 17 | 37.78% | 1 | 50.00% |
| Total | 45 | 100.00% | 2 | 100.00% |
static void mn_invalidate_range(struct mmu_notifier *mn,
struct mm_struct *mm,
unsigned long start, unsigned long end)
{
struct pasid_state *pasid_state;
struct device_state *dev_state;
pasid_state = mn_to_state(mn);
dev_state = pasid_state->device_state;
if ((start ^ (end - 1)) < PAGE_SIZE)
amd_iommu_flush_page(dev_state->domain, pasid_state->pasid,
start);
else
amd_iommu_flush_tlb(dev_state->domain, pasid_state->pasid);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 86 | 100.00% | 5 | 100.00% |
| Total | 86 | 100.00% | 5 | 100.00% |
static void mn_release(struct mmu_notifier *mn, struct mm_struct *mm)
{
struct pasid_state *pasid_state;
struct device_state *dev_state;
bool run_inv_ctx_cb;
might_sleep();
pasid_state = mn_to_state(mn);
dev_state = pasid_state->device_state;
run_inv_ctx_cb = !pasid_state->invalid;
if (run_inv_ctx_cb && dev_state->inv_ctx_cb)
dev_state->inv_ctx_cb(dev_state->pdev, pasid_state->pasid);
unbind_pasid(pasid_state);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 77 | 98.72% | 2 | 66.67% |
| Dan Carpenter | 1 | 1.28% | 1 | 33.33% |
| Total | 78 | 100.00% | 3 | 100.00% |
static const struct mmu_notifier_ops iommu_mn = {
.release = mn_release,
.clear_flush_young = mn_clear_flush_young,
.invalidate_range = mn_invalidate_range,
};
static void set_pri_tag_status(struct pasid_state *pasid_state,
u16 tag, int status)
{
unsigned long flags;
spin_lock_irqsave(&pasid_state->lock, flags);
pasid_state->pri[tag].status = status;
spin_unlock_irqrestore(&pasid_state->lock, flags);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 52 | 100.00% | 2 | 100.00% |
| Total | 52 | 100.00% | 2 | 100.00% |
static void finish_pri_tag(struct device_state *dev_state,
struct pasid_state *pasid_state,
u16 tag)
{
unsigned long flags;
spin_lock_irqsave(&pasid_state->lock, flags);
if (atomic_dec_and_test(&pasid_state->pri[tag].inflight) &&
pasid_state->pri[tag].finish) {
amd_iommu_complete_ppr(dev_state->pdev, pasid_state->pasid,
pasid_state->pri[tag].status, tag);
pasid_state->pri[tag].finish = false;
pasid_state->pri[tag].status = PPR_SUCCESS;
}
spin_unlock_irqrestore(&pasid_state->lock, flags);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 113 | 100.00% | 2 | 100.00% |
| Total | 113 | 100.00% | 2 | 100.00% |
static void handle_fault_error(struct fault *fault)
{
int status;
if (!fault->dev_state->inv_ppr_cb) {
set_pri_tag_status(fault->state, fault->tag, PPR_INVALID);
return;
}
status = fault->dev_state->inv_ppr_cb(fault->dev_state->pdev,
fault->pasid,
fault->address,
fault->flags);
switch (status) {
case AMD_IOMMU_INV_PRI_RSP_SUCCESS:
set_pri_tag_status(fault->state, fault->tag, PPR_SUCCESS);
break;
case AMD_IOMMU_INV_PRI_RSP_INVALID:
set_pri_tag_status(fault->state, fault->tag, PPR_INVALID);
break;
case AMD_IOMMU_INV_PRI_RSP_FAIL:
set_pri_tag_status(fault->state, fault->tag, PPR_FAILURE);
break;
default:
BUG();
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 110 | 86.61% | 2 | 50.00% |
| Jesse Barnes | 14 | 11.02% | 1 | 25.00% |
| Jay Cornwall | 3 | 2.36% | 1 | 25.00% |
| Total | 127 | 100.00% | 4 | 100.00% |
static bool access_error(struct vm_area_struct *vma, struct fault *fault)
{
unsigned long requested = 0;
if (fault->flags & PPR_FAULT_EXEC)
requested |= VM_EXEC;
if (fault->flags & PPR_FAULT_READ)
requested |= VM_READ;
if (fault->flags & PPR_FAULT_WRITE)
requested |= VM_WRITE;
return (requested & ~vma->vm_flags) != 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 70 | 100.00% | 1 | 100.00% |
| Total | 70 | 100.00% | 1 | 100.00% |
static void do_fault(struct work_struct *work)
{
struct fault *fault = container_of(work, struct fault, work);
struct vm_area_struct *vma;
int ret = VM_FAULT_ERROR;
unsigned int flags = 0;
struct mm_struct *mm;
u64 address;
mm = fault->state->mm;
address = fault->address;
if (fault->flags & PPR_FAULT_USER)
flags |= FAULT_FLAG_USER;
if (fault->flags & PPR_FAULT_WRITE)
flags |= FAULT_FLAG_WRITE;
flags |= FAULT_FLAG_REMOTE;
down_read(&mm->mmap_sem);
vma = find_extend_vma(mm, address);
if (!vma || address < vma->vm_start)
/* failed to get a vma in the right range */
goto out;
/* Check if we have the right permissions on the vma */
if (access_error(vma, fault))
goto out;
ret = handle_mm_fault(vma, address, flags);
out:
up_read(&mm->mmap_sem);
if (ret & VM_FAULT_ERROR)
/* failed to service fault */
handle_fault_error(fault);
finish_pri_tag(fault->dev_state, fault->state, fault->tag);
put_pasid_state(fault->state);
kfree(fault);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jesse Barnes | 93 | 47.21% | 1 | 12.50% |
| Joerg Roedel | 93 | 47.21% | 5 | 62.50% |
| Jay Cornwall | 7 | 3.55% | 1 | 12.50% |
| Dave Hansen | 4 | 2.03% | 1 | 12.50% |
| Total | 197 | 100.00% | 8 | 100.00% |
static int ppr_notifier(struct notifier_block *nb, unsigned long e, void *data)
{
struct amd_iommu_fault *iommu_fault;
struct pasid_state *pasid_state;
struct device_state *dev_state;
unsigned long flags;
struct fault *fault;
bool finish;
u16 tag, devid;
int ret;
struct iommu_dev_data *dev_data;
struct pci_dev *pdev = NULL;
iommu_fault = data;
tag = iommu_fault->tag & 0x1ff;
finish = (iommu_fault->tag >> 9) & 1;
devid = iommu_fault->device_id;
pdev = pci_get_bus_and_slot(PCI_BUS_NUM(devid), devid & 0xff);
if (!pdev)
return -ENODEV;
dev_data = get_dev_data(&pdev->dev);
/* In kdump kernel pci dev is not initialized yet -> send INVALID */
ret = NOTIFY_DONE;
if (translation_pre_enabled(amd_iommu_rlookup_table[devid])
&& dev_data->defer_attach) {
amd_iommu_complete_ppr(pdev, iommu_fault->pasid,
PPR_INVALID, tag);
goto out;
}
dev_state = get_device_state(iommu_fault->device_id);
if (dev_state == NULL)
goto out;
pasid_state = get_pasid_state(dev_state, iommu_fault->pasid);
if (pasid_state == NULL || pasid_state->invalid) {
/* We know the device but not the PASID -> send INVALID */
amd_iommu_complete_ppr(dev_state->pdev, iommu_fault->pasid,
PPR_INVALID, tag);
goto out_drop_state;
}
spin_lock_irqsave(&pasid_state->lock, flags);
atomic_inc(&pasid_state->pri[tag].inflight);
if (finish)
pasid_state->pri[tag].finish = true;
spin_unlock_irqrestore(&pasid_state->lock, flags);
fault = kzalloc(sizeof(*fault), GFP_ATOMIC);
if (fault == NULL) {
/* We are OOM - send success and let the device re-fault */
finish_pri_tag(dev_state, pasid_state, tag);
goto out_drop_state;
}
fault->dev_state = dev_state;
fault->address = iommu_fault->address;
fault->state = pasid_state;
fault->tag = tag;
fault->finish = finish;
fault->pasid = iommu_fault->pasid;
fault->flags = iommu_fault->flags;
INIT_WORK(&fault->work, do_fault);
queue_work(iommu_wq, &fault->work);
ret = NOTIFY_OK;
out_drop_state:
if (ret != NOTIFY_OK && pasid_state)
put_pasid_state(pasid_state);
put_device_state(dev_state);
out:
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 311 | 76.79% | 3 | 60.00% |
| Baoquan He | 86 | 21.23% | 1 | 20.00% |
| Alexey Skidanov | 8 | 1.98% | 1 | 20.00% |
| Total | 405 | 100.00% | 5 | 100.00% |
static struct notifier_block ppr_nb = {
.notifier_call = ppr_notifier,
};
int amd_iommu_bind_pasid(struct pci_dev *pdev, int pasid,
struct task_struct *task)
{
struct pasid_state *pasid_state;
struct device_state *dev_state;
struct mm_struct *mm;
u16 devid;
int ret;
might_sleep();
if (!amd_iommu_v2_supported())
return -ENODEV;
devid = device_id(pdev);
dev_state = get_device_state(devid);
if (dev_state == NULL)
return -EINVAL;
ret = -EINVAL;
if (pasid < 0 || pasid >= dev_state->max_pasids)
goto out;
ret = -ENOMEM;
pasid_state = kzalloc(sizeof(*pasid_state), GFP_KERNEL);
if (pasid_state == NULL)
goto out;
atomic_set(&pasid_state->count, 1);
init_waitqueue_head(&pasid_state->wq);
spin_lock_init(&pasid_state->lock);
mm = get_task_mm(task);
pasid_state->mm = mm;
pasid_state->device_state = dev_state;
pasid_state->pasid = pasid;
pasid_state->invalid = true; /* Mark as valid only if we are
done with setting up the pasid */
pasid_state->mn.ops = &iommu_mn;
if (pasid_state->mm == NULL)
goto out_free;
mmu_notifier_register(&pasid_state->mn, mm);
ret = set_pasid_state(dev_state, pasid_state, pasid);
if (ret)
goto out_unregister;
ret = amd_iommu_domain_set_gcr3(dev_state->domain, pasid,
__pa(pasid_state->mm->pgd));
if (ret)
goto out_clear_state;
/* Now we are ready to handle faults */
pasid_state->invalid = false;
/*
* Drop the reference to the mm_struct here. We rely on the
* mmu_notifier release call-back to inform us when the mm
* is going away.
*/
mmput(mm);
return 0;
out_clear_state:
clear_pasid_state(dev_state, pasid);
out_unregister:
mmu_notifier_unregister(&pasid_state->mn, mm);
mmput(mm);
out_free:
free_pasid_state(pasid_state);
out:
put_device_state(dev_state);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 313 | 99.37% | 9 | 90.00% |
| Pan Bian | 2 | 0.63% | 1 | 10.00% |
| Total | 315 | 100.00% | 10 | 100.00% |
EXPORT_SYMBOL(amd_iommu_bind_pasid);
void amd_iommu_unbind_pasid(struct pci_dev *pdev, int pasid)
{
struct pasid_state *pasid_state;
struct device_state *dev_state;
u16 devid;
might_sleep();
if (!amd_iommu_v2_supported())
return;
devid = device_id(pdev);
dev_state = get_device_state(devid);
if (dev_state == NULL)
return;
if (pasid < 0 || pasid >= dev_state->max_pasids)
goto out;
pasid_state = get_pasid_state(dev_state, pasid);
if (pasid_state == NULL)
goto out;
/*
* Drop reference taken here. We are safe because we still hold
* the reference taken in the amd_iommu_bind_pasid function.
*/
put_pasid_state(pasid_state);
/* Clear the pasid state so that the pasid can be re-used */
clear_pasid_state(dev_state, pasid_state->pasid);
/*
* Call mmu_notifier_unregister to drop our reference
* to pasid_state->mm
*/
mmu_notifier_unregister(&pasid_state->mn, pasid_state->mm);
put_pasid_state_wait(pasid_state); /* Reference taken in
amd_iommu_bind_pasid */
out:
/* Drop reference taken in this function */
put_device_state(dev_state);
/* Drop reference taken in amd_iommu_bind_pasid */
put_device_state(dev_state);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 139 | 100.00% | 8 | 100.00% |
| Total | 139 | 100.00% | 8 | 100.00% |
EXPORT_SYMBOL(amd_iommu_unbind_pasid);
int amd_iommu_init_device(struct pci_dev *pdev, int pasids)
{
struct device_state *dev_state;
struct iommu_group *group;
unsigned long flags;
int ret, tmp;
u16 devid;
might_sleep();
if (!amd_iommu_v2_supported())
return -ENODEV;
if (pasids <= 0 || pasids > (PASID_MASK + 1))
return -EINVAL;
devid = device_id(pdev);
dev_state = kzalloc(sizeof(*dev_state), GFP_KERNEL);
if (dev_state == NULL)
return -ENOMEM;
spin_lock_init(&dev_state->lock);
init_waitqueue_head(&dev_state->wq);
dev_state->pdev = pdev;
dev_state->devid = devid;
tmp = pasids;
for (dev_state->pasid_levels = 0; (tmp - 1) & ~0x1ff; tmp >>= 9)
dev_state->pasid_levels += 1;
atomic_set(&dev_state->count, 1);
dev_state->max_pasids = pasids;
ret = -ENOMEM;
dev_state->states = (void *)get_zeroed_page(GFP_KERNEL);
if (dev_state->states == NULL)
goto out_free_dev_state;
dev_state->domain = iommu_domain_alloc(&pci_bus_type);
if (dev_state->domain == NULL)
goto out_free_states;
amd_iommu_domain_direct_map(dev_state->domain);
ret = amd_iommu_domain_enable_v2(dev_state->domain, pasids);
if (ret)
goto out_free_domain;
group = iommu_group_get(&pdev->dev);
if (!group) {
ret = -EINVAL;
goto out_free_domain;
}
ret = iommu_attach_group(dev_state->domain, group);
if (ret != 0)
goto out_drop_group;
iommu_group_put(group);
spin_lock_irqsave(&state_lock, flags);
if (__get_device_state(devid) != NULL) {
spin_unlock_irqrestore(&state_lock, flags);
ret = -EBUSY;
goto out_free_domain;
}
list_add_tail(&dev_state->list, &state_list);
spin_unlock_irqrestore(&state_lock, flags);
return 0;
out_drop_group:
iommu_group_put(group);
out_free_domain:
iommu_domain_free(dev_state->domain);
out_free_states:
free_page((unsigned long)dev_state->states);
out_free_dev_state:
kfree(dev_state);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 385 | 98.21% | 4 | 80.00% |
| Dan Carpenter | 7 | 1.79% | 1 | 20.00% |
| Total | 392 | 100.00% | 5 | 100.00% |
EXPORT_SYMBOL(amd_iommu_init_device);
void amd_iommu_free_device(struct pci_dev *pdev)
{
struct device_state *dev_state;
unsigned long flags;
u16 devid;
if (!amd_iommu_v2_supported())
return;
devid = device_id(pdev);
spin_lock_irqsave(&state_lock, flags);
dev_state = __get_device_state(devid);
if (dev_state == NULL) {
spin_unlock_irqrestore(&state_lock, flags);
return;
}
list_del(&dev_state->list);
spin_unlock_irqrestore(&state_lock, flags);
/* Get rid of any remaining pasid states */
free_pasid_states(dev_state);
put_device_state(dev_state);
/*
* Wait until the last reference is dropped before freeing
* the device state.
*/
wait_event(dev_state->wq, !atomic_read(&dev_state->count));
free_device_state(dev_state);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 94 | 80.34% | 4 | 80.00% |
| Peter Zijlstra | 23 | 19.66% | 1 | 20.00% |
| Total | 117 | 100.00% | 5 | 100.00% |
EXPORT_SYMBOL(amd_iommu_free_device);
int amd_iommu_set_invalid_ppr_cb(struct pci_dev *pdev,
amd_iommu_invalid_ppr_cb cb)
{
struct device_state *dev_state;
unsigned long flags;
u16 devid;
int ret;
if (!amd_iommu_v2_supported())
return -ENODEV;
devid = device_id(pdev);
spin_lock_irqsave(&state_lock, flags);
ret = -EINVAL;
dev_state = __get_device_state(devid);
if (dev_state == NULL)
goto out_unlock;
dev_state->inv_ppr_cb = cb;
ret = 0;
out_unlock:
spin_unlock_irqrestore(&state_lock, flags);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 97 | 100.00% | 2 | 100.00% |
| Total | 97 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL(amd_iommu_set_invalid_ppr_cb);
int amd_iommu_set_invalidate_ctx_cb(struct pci_dev *pdev,
amd_iommu_invalidate_ctx cb)
{
struct device_state *dev_state;
unsigned long flags;
u16 devid;
int ret;
if (!amd_iommu_v2_supported())
return -ENODEV;
devid = device_id(pdev);
spin_lock_irqsave(&state_lock, flags);
ret = -EINVAL;
dev_state = __get_device_state(devid);
if (dev_state == NULL)
goto out_unlock;
dev_state->inv_ctx_cb = cb;
ret = 0;
out_unlock:
spin_unlock_irqrestore(&state_lock, flags);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 97 | 100.00% | 2 | 100.00% |
| Total | 97 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL(amd_iommu_set_invalidate_ctx_cb);
static int __init amd_iommu_v2_init(void)
{
int ret;
pr_info("AMD IOMMUv2 driver by Joerg Roedel <jroedel@suse.de>\n");
if (!amd_iommu_v2_supported()) {
pr_info("AMD IOMMUv2 functionality not available on this system\n");
/*
* Load anyway to provide the symbols to other modules
* which may use AMD IOMMUv2 optionally.
*/
return 0;
}
spin_lock_init(&state_lock);
ret = -ENOMEM;
iommu_wq = alloc_workqueue("amd_iommu_v2", WQ_MEM_RECLAIM, 0);
if (iommu_wq == NULL)
goto out;
amd_iommu_register_ppr_notifier(&ppr_nb);
return 0;
out:
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 73 | 92.41% | 7 | 77.78% |
| Bhaktipriya Shridhar | 5 | 6.33% | 1 | 11.11% |
| Masanari Iida | 1 | 1.27% | 1 | 11.11% |
| Total | 79 | 100.00% | 9 | 100.00% |
static void __exit amd_iommu_v2_exit(void)
{
struct device_state *dev_state;
int i;
if (!amd_iommu_v2_supported())
return;
amd_iommu_unregister_ppr_notifier(&ppr_nb);
flush_workqueue(iommu_wq);
/*
* The loop below might call flush_workqueue(), so call
* destroy_workqueue() after it
*/
for (i = 0; i < MAX_DEVICES; ++i) {
dev_state = get_device_state(i);
if (dev_state == NULL)
continue;
WARN_ON_ONCE(1);
put_device_state(dev_state);
amd_iommu_free_device(dev_state->pdev);
}
destroy_workqueue(iommu_wq);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 87 | 100.00% | 4 | 100.00% |
| Total | 87 | 100.00% | 4 | 100.00% |
module_init(amd_iommu_v2_init);
module_exit(amd_iommu_v2_exit);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Joerg Roedel | 3638 | 92.76% | 33 | 66.00% |
| Jesse Barnes | 107 | 2.73% | 1 | 2.00% |
| Baoquan He | 86 | 2.19% | 1 | 2.00% |
| Peter Zijlstra | 23 | 0.59% | 1 | 2.00% |
| Andres Lagar-Cavilla | 17 | 0.43% | 1 | 2.00% |
| Jay Cornwall | 10 | 0.25% | 2 | 4.00% |
| Oded Gabbay | 9 | 0.23% | 2 | 4.00% |
| Alexey Skidanov | 8 | 0.20% | 1 | 2.00% |
| Dan Carpenter | 8 | 0.20% | 2 | 4.00% |
| Bhaktipriya Shridhar | 5 | 0.13% | 1 | 2.00% |
| Dave Hansen | 4 | 0.10% | 1 | 2.00% |
| Ingo Molnar | 3 | 0.08% | 1 | 2.00% |
| Pan Bian | 2 | 0.05% | 1 | 2.00% |
| Julia Lawall | 1 | 0.03% | 1 | 2.00% |
| Masanari Iida | 1 | 0.03% | 1 | 2.00% |
| Total | 3922 | 100.00% | 50 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.