1e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel/* 2e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel * Copyright (C) 2010-2012 Advanced Micro Devices, Inc. 3e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel * Author: Joerg Roedel <joerg.roedel@amd.com> 4e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel * 5e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel * This program is free software; you can redistribute it and/or modify it 6e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel * under the terms of the GNU General Public License version 2 as published 7e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel * by the Free Software Foundation. 8e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel * 9e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel * This program is distributed in the hope that it will be useful, 10e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel * but WITHOUT ANY WARRANTY; without even the implied warranty of 11e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel * GNU General Public License for more details. 13e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel * 14e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel * You should have received a copy of the GNU General Public License 15e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel * along with this program; if not, write to the Free Software 16e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 17e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel */ 18e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel 198736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel#include <linux/mmu_notifier.h> 20ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel#include <linux/amd-iommu.h> 21ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel#include <linux/mm_types.h> 228736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel#include <linux/profile.h> 23e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel#include <linux/module.h> 242d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel#include <linux/sched.h> 25ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel#include <linux/iommu.h> 26028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel#include <linux/wait.h> 27ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel#include <linux/pci.h> 28ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel#include <linux/gfp.h> 29ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 30028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel#include "amd_iommu_types.h" 31ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel#include "amd_iommu_proto.h" 32e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel 33e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg RoedelMODULE_LICENSE("GPL v2"); 34e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg RoedelMODULE_AUTHOR("Joerg Roedel <joerg.roedel@amd.com>"); 35e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel 36ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel#define MAX_DEVICES 0x10000 37ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel#define PRI_QUEUE_SIZE 512 38ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 39ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedelstruct pri_queue { 40ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel atomic_t inflight; 41ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel bool finish; 42028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel int status; 43ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel}; 44ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 45ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedelstruct pasid_state { 46ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel struct list_head list; /* For global state-list */ 47ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel atomic_t count; /* Reference count */ 48ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel struct task_struct *task; /* Task bound to this PASID */ 49ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel struct mm_struct *mm; /* mm_struct for the faults */ 508736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel struct mmu_notifier mn; /* mmu_otifier handle */ 51ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel struct pri_queue pri[PRI_QUEUE_SIZE]; /* PRI tag states */ 52ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel struct device_state *device_state; /* Link to our device_state */ 53ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel int pasid; /* PASID index */ 54028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel spinlock_t lock; /* Protect pri_queues */ 55028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel wait_queue_head_t wq; /* To wait for count == 0 */ 56ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel}; 57ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 58ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedelstruct device_state { 59ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel atomic_t count; 60ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel struct pci_dev *pdev; 61ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel struct pasid_state **states; 62ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel struct iommu_domain *domain; 63ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel int pasid_levels; 64ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel int max_pasids; 65175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel amd_iommu_invalid_ppr_cb inv_ppr_cb; 66bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel amd_iommu_invalidate_ctx inv_ctx_cb; 67ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel spinlock_t lock; 68028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel wait_queue_head_t wq; 69028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel}; 70028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 71028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedelstruct fault { 72028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel struct work_struct work; 73028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel struct device_state *dev_state; 74028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel struct pasid_state *state; 75028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel struct mm_struct *mm; 76028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel u64 address; 77028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel u16 devid; 78028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel u16 pasid; 79028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel u16 tag; 80028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel u16 finish; 81028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel u16 flags; 82ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel}; 83ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 84ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedelstruct device_state **state_table; 85ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedelstatic spinlock_t state_lock; 86ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 87ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel/* List and lock for all pasid_states */ 88ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedelstatic LIST_HEAD(pasid_state_list); 892d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelstatic DEFINE_SPINLOCK(ps_lock); 902d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 91028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedelstatic struct workqueue_struct *iommu_wq; 92028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 938736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel/* 948736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel * Empty page table - Used between 958736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel * mmu_notifier_invalidate_range_start and 968736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel * mmu_notifier_invalidate_range_end 978736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel */ 988736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedelstatic u64 *empty_page_table; 998736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 1002d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelstatic void free_pasid_states(struct device_state *dev_state); 1012d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelstatic void unbind_pasid(struct device_state *dev_state, int pasid); 1028736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedelstatic int task_exit(struct notifier_block *nb, unsigned long e, void *data); 103ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 104ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedelstatic u16 device_id(struct pci_dev *pdev) 105ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel{ 106ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel u16 devid; 107ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 108ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel devid = pdev->bus->number; 109ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel devid = (devid << 8) | pdev->devfn; 110ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 111ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel return devid; 112ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel} 113ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 114ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedelstatic struct device_state *get_device_state(u16 devid) 115ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel{ 116ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel struct device_state *dev_state; 117ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel unsigned long flags; 118ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 119ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel spin_lock_irqsave(&state_lock, flags); 120ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel dev_state = state_table[devid]; 121ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel if (dev_state != NULL) 122ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel atomic_inc(&dev_state->count); 123ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel spin_unlock_irqrestore(&state_lock, flags); 124ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 125ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel return dev_state; 126ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel} 127ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 128ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedelstatic void free_device_state(struct device_state *dev_state) 129ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel{ 1302d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel /* 1312d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel * First detach device from domain - No more PRI requests will arrive 1322d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel * from that device after it is unbound from the IOMMUv2 domain. 1332d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel */ 134ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel iommu_detach_device(dev_state->domain, &dev_state->pdev->dev); 1352d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 1362d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel /* Everything is down now, free the IOMMUv2 domain */ 137ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel iommu_domain_free(dev_state->domain); 1382d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 1392d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel /* Finally get rid of the device-state */ 140ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel kfree(dev_state); 141ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel} 142ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 143ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedelstatic void put_device_state(struct device_state *dev_state) 144ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel{ 145ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel if (atomic_dec_and_test(&dev_state->count)) 146028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel wake_up(&dev_state->wq); 147ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel} 148ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 149028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedelstatic void put_device_state_wait(struct device_state *dev_state) 150028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel{ 151028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel DEFINE_WAIT(wait); 152028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 153028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel prepare_to_wait(&dev_state->wq, &wait, TASK_UNINTERRUPTIBLE); 154028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel if (!atomic_dec_and_test(&dev_state->count)) 155028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel schedule(); 156028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel finish_wait(&dev_state->wq, &wait); 157028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 158028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel free_device_state(dev_state); 159028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel} 1608736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 1618736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedelstatic struct notifier_block profile_nb = { 1628736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel .notifier_call = task_exit, 1638736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel}; 1648736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 1652d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelstatic void link_pasid_state(struct pasid_state *pasid_state) 1662d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel{ 1672d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel spin_lock(&ps_lock); 1682d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel list_add_tail(&pasid_state->list, &pasid_state_list); 1692d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel spin_unlock(&ps_lock); 1702d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel} 1712d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 1722d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelstatic void __unlink_pasid_state(struct pasid_state *pasid_state) 1732d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel{ 1742d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel list_del(&pasid_state->list); 1752d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel} 1762d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 1772d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelstatic void unlink_pasid_state(struct pasid_state *pasid_state) 1782d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel{ 1792d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel spin_lock(&ps_lock); 1802d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel __unlink_pasid_state(pasid_state); 1812d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel spin_unlock(&ps_lock); 1822d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel} 1832d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 1842d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel/* Must be called under dev_state->lock */ 1852d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelstatic struct pasid_state **__get_pasid_state_ptr(struct device_state *dev_state, 1862d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel int pasid, bool alloc) 1872d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel{ 1882d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel struct pasid_state **root, **ptr; 1892d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel int level, index; 1902d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 1912d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel level = dev_state->pasid_levels; 1922d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel root = dev_state->states; 1932d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 1942d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel while (true) { 1952d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 1962d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel index = (pasid >> (9 * level)) & 0x1ff; 1972d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel ptr = &root[index]; 1982d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 1992d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (level == 0) 2002d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel break; 2012d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2022d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (*ptr == NULL) { 2032d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (!alloc) 2042d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel return NULL; 2052d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2062d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel *ptr = (void *)get_zeroed_page(GFP_ATOMIC); 2072d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (*ptr == NULL) 2082d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel return NULL; 2092d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel } 2102d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2112d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel root = (struct pasid_state **)*ptr; 2122d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel level -= 1; 2132d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel } 2142d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2152d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel return ptr; 2162d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel} 2172d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2182d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelstatic int set_pasid_state(struct device_state *dev_state, 2192d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel struct pasid_state *pasid_state, 2202d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel int pasid) 2212d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel{ 2222d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel struct pasid_state **ptr; 2232d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel unsigned long flags; 2242d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel int ret; 2252d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2262d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel spin_lock_irqsave(&dev_state->lock, flags); 2272d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel ptr = __get_pasid_state_ptr(dev_state, pasid, true); 2282d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2292d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel ret = -ENOMEM; 2302d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (ptr == NULL) 2312d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel goto out_unlock; 2322d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2332d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel ret = -ENOMEM; 2342d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (*ptr != NULL) 2352d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel goto out_unlock; 2362d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2372d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel *ptr = pasid_state; 2382d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2392d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel ret = 0; 2402d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2412d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelout_unlock: 2422d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel spin_unlock_irqrestore(&dev_state->lock, flags); 2432d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2442d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel return ret; 2452d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel} 2462d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2472d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelstatic void clear_pasid_state(struct device_state *dev_state, int pasid) 2482d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel{ 2492d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel struct pasid_state **ptr; 2502d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel unsigned long flags; 2512d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2522d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel spin_lock_irqsave(&dev_state->lock, flags); 2532d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel ptr = __get_pasid_state_ptr(dev_state, pasid, true); 2542d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2552d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (ptr == NULL) 2562d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel goto out_unlock; 2572d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2582d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel *ptr = NULL; 2592d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2602d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelout_unlock: 2612d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel spin_unlock_irqrestore(&dev_state->lock, flags); 2622d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel} 2632d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2642d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelstatic struct pasid_state *get_pasid_state(struct device_state *dev_state, 2652d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel int pasid) 2662d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel{ 2672d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel struct pasid_state **ptr, *ret = NULL; 2682d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel unsigned long flags; 2692d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2702d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel spin_lock_irqsave(&dev_state->lock, flags); 2712d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel ptr = __get_pasid_state_ptr(dev_state, pasid, false); 2722d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2732d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (ptr == NULL) 2742d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel goto out_unlock; 2752d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2762d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel ret = *ptr; 2772d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (ret) 2782d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel atomic_inc(&ret->count); 2792d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2802d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelout_unlock: 2812d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel spin_unlock_irqrestore(&dev_state->lock, flags); 2822d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2832d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel return ret; 2842d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel} 2852d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2862d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelstatic void free_pasid_state(struct pasid_state *pasid_state) 2872d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel{ 2882d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel kfree(pasid_state); 2892d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel} 2902d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 2912d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelstatic void put_pasid_state(struct pasid_state *pasid_state) 2922d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel{ 2932d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (atomic_dec_and_test(&pasid_state->count)) { 2942d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel put_device_state(pasid_state->device_state); 295028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel wake_up(&pasid_state->wq); 2962d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel } 2972d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel} 2982d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 299028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedelstatic void put_pasid_state_wait(struct pasid_state *pasid_state) 300028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel{ 301028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel DEFINE_WAIT(wait); 302028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 303028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel prepare_to_wait(&pasid_state->wq, &wait, TASK_UNINTERRUPTIBLE); 304028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 305028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel if (atomic_dec_and_test(&pasid_state->count)) 306028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel put_device_state(pasid_state->device_state); 307028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel else 308028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel schedule(); 309028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 310028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel finish_wait(&pasid_state->wq, &wait); 311028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel mmput(pasid_state->mm); 312028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel free_pasid_state(pasid_state); 313028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel} 314028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 3158736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedelstatic void __unbind_pasid(struct pasid_state *pasid_state) 3168736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel{ 3178736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel struct iommu_domain *domain; 3188736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 3198736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel domain = pasid_state->device_state->domain; 3208736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 3218736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel amd_iommu_domain_clear_gcr3(domain, pasid_state->pasid); 3228736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel clear_pasid_state(pasid_state->device_state, pasid_state->pasid); 3238736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 3248736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel /* Make sure no more pending faults are in the queue */ 3258736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel flush_workqueue(iommu_wq); 3268736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 3278736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel mmu_notifier_unregister(&pasid_state->mn, pasid_state->mm); 3288736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 3298736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel put_pasid_state(pasid_state); /* Reference taken in bind() function */ 3308736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel} 3318736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 3322d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelstatic void unbind_pasid(struct device_state *dev_state, int pasid) 3332d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel{ 3342d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel struct pasid_state *pasid_state; 3352d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 3362d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel pasid_state = get_pasid_state(dev_state, pasid); 3372d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (pasid_state == NULL) 3382d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel return; 3392d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 3402d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel unlink_pasid_state(pasid_state); 3418736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel __unbind_pasid(pasid_state); 3428736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel put_pasid_state_wait(pasid_state); /* Reference taken in this function */ 3432d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel} 3442d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 3452d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelstatic void free_pasid_states_level1(struct pasid_state **tbl) 3462d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel{ 3472d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel int i; 3482d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 3492d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel for (i = 0; i < 512; ++i) { 3502d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (tbl[i] == NULL) 3512d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel continue; 3522d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 3532d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel free_page((unsigned long)tbl[i]); 3542d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel } 3552d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel} 3562d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 3572d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelstatic void free_pasid_states_level2(struct pasid_state **tbl) 3582d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel{ 3592d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel struct pasid_state **ptr; 3602d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel int i; 3612d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 3622d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel for (i = 0; i < 512; ++i) { 3632d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (tbl[i] == NULL) 3642d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel continue; 3652d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 3662d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel ptr = (struct pasid_state **)tbl[i]; 3672d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel free_pasid_states_level1(ptr); 3682d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel } 3692d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel} 3702d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 3712d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelstatic void free_pasid_states(struct device_state *dev_state) 3722d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel{ 3732d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel struct pasid_state *pasid_state; 3742d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel int i; 3752d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 3762d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel for (i = 0; i < dev_state->max_pasids; ++i) { 3772d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel pasid_state = get_pasid_state(dev_state, i); 3782d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (pasid_state == NULL) 3792d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel continue; 3802d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 3812d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel put_pasid_state(pasid_state); 382028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel unbind_pasid(dev_state, i); 3832d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel } 3842d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 3852d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (dev_state->pasid_levels == 2) 3862d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel free_pasid_states_level2(dev_state->states); 3872d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel else if (dev_state->pasid_levels == 1) 3882d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel free_pasid_states_level1(dev_state->states); 3892d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel else if (dev_state->pasid_levels != 0) 3902d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel BUG(); 3912d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 3922d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel free_page((unsigned long)dev_state->states); 3932d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel} 3942d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 3958736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedelstatic struct pasid_state *mn_to_state(struct mmu_notifier *mn) 3968736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel{ 3978736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel return container_of(mn, struct pasid_state, mn); 3988736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel} 3998736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 4008736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedelstatic void __mn_flush_page(struct mmu_notifier *mn, 4018736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel unsigned long address) 4028736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel{ 4038736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel struct pasid_state *pasid_state; 4048736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel struct device_state *dev_state; 4058736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 4068736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel pasid_state = mn_to_state(mn); 4078736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel dev_state = pasid_state->device_state; 4088736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 4098736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel amd_iommu_flush_page(dev_state->domain, pasid_state->pasid, address); 4108736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel} 4118736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 4128736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedelstatic int mn_clear_flush_young(struct mmu_notifier *mn, 4138736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel struct mm_struct *mm, 4148736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel unsigned long address) 4158736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel{ 4168736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel __mn_flush_page(mn, address); 4178736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 4188736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel return 0; 4198736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel} 4208736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 4218736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedelstatic void mn_change_pte(struct mmu_notifier *mn, 4228736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel struct mm_struct *mm, 4238736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel unsigned long address, 4248736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel pte_t pte) 4258736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel{ 4268736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel __mn_flush_page(mn, address); 4278736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel} 4288736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 4298736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedelstatic void mn_invalidate_page(struct mmu_notifier *mn, 4308736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel struct mm_struct *mm, 4318736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel unsigned long address) 4328736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel{ 4338736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel __mn_flush_page(mn, address); 4348736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel} 4358736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 4368736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedelstatic void mn_invalidate_range_start(struct mmu_notifier *mn, 4378736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel struct mm_struct *mm, 4388736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel unsigned long start, unsigned long end) 4398736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel{ 4408736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel struct pasid_state *pasid_state; 4418736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel struct device_state *dev_state; 4428736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 4438736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel pasid_state = mn_to_state(mn); 4448736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel dev_state = pasid_state->device_state; 4458736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 4468736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel amd_iommu_domain_set_gcr3(dev_state->domain, pasid_state->pasid, 4478736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel __pa(empty_page_table)); 4488736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel} 4498736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 4508736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedelstatic void mn_invalidate_range_end(struct mmu_notifier *mn, 4518736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel struct mm_struct *mm, 4528736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel unsigned long start, unsigned long end) 4538736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel{ 4548736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel struct pasid_state *pasid_state; 4558736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel struct device_state *dev_state; 4568736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 4578736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel pasid_state = mn_to_state(mn); 4588736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel dev_state = pasid_state->device_state; 4598736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 4608736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel amd_iommu_domain_set_gcr3(dev_state->domain, pasid_state->pasid, 4618736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel __pa(pasid_state->mm->pgd)); 4628736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel} 4638736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 4648736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedelstatic struct mmu_notifier_ops iommu_mn = { 4658736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel .clear_flush_young = mn_clear_flush_young, 4668736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel .change_pte = mn_change_pte, 4678736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel .invalidate_page = mn_invalidate_page, 4688736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel .invalidate_range_start = mn_invalidate_range_start, 4698736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel .invalidate_range_end = mn_invalidate_range_end, 4708736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel}; 4718736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 472028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedelstatic void set_pri_tag_status(struct pasid_state *pasid_state, 473028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel u16 tag, int status) 474028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel{ 475028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel unsigned long flags; 476028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 477028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel spin_lock_irqsave(&pasid_state->lock, flags); 478028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel pasid_state->pri[tag].status = status; 479028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel spin_unlock_irqrestore(&pasid_state->lock, flags); 480028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel} 481028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 482028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedelstatic void finish_pri_tag(struct device_state *dev_state, 483028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel struct pasid_state *pasid_state, 484028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel u16 tag) 485028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel{ 486028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel unsigned long flags; 487028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 488028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel spin_lock_irqsave(&pasid_state->lock, flags); 489028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel if (atomic_dec_and_test(&pasid_state->pri[tag].inflight) && 490028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel pasid_state->pri[tag].finish) { 491028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel amd_iommu_complete_ppr(dev_state->pdev, pasid_state->pasid, 492028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel pasid_state->pri[tag].status, tag); 493028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel pasid_state->pri[tag].finish = false; 494028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel pasid_state->pri[tag].status = PPR_SUCCESS; 495028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel } 496028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel spin_unlock_irqrestore(&pasid_state->lock, flags); 497028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel} 498028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 499028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedelstatic void do_fault(struct work_struct *work) 500028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel{ 501028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel struct fault *fault = container_of(work, struct fault, work); 502028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel int npages, write; 503028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel struct page *page; 504028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 505028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel write = !!(fault->flags & PPR_FAULT_WRITE); 506028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 507028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel npages = get_user_pages(fault->state->task, fault->state->mm, 508028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel fault->address, 1, write, 0, &page, NULL); 509028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 510175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel if (npages == 1) { 511028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel put_page(page); 512175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel } else if (fault->dev_state->inv_ppr_cb) { 513175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel int status; 514175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel 515175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel status = fault->dev_state->inv_ppr_cb(fault->dev_state->pdev, 516175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel fault->pasid, 517175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel fault->address, 518175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel fault->flags); 519175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel switch (status) { 520175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel case AMD_IOMMU_INV_PRI_RSP_SUCCESS: 521175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel set_pri_tag_status(fault->state, fault->tag, PPR_SUCCESS); 522175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel break; 523175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel case AMD_IOMMU_INV_PRI_RSP_INVALID: 524175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel set_pri_tag_status(fault->state, fault->tag, PPR_INVALID); 525175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel break; 526175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel case AMD_IOMMU_INV_PRI_RSP_FAIL: 527175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel set_pri_tag_status(fault->state, fault->tag, PPR_FAILURE); 528175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel break; 529175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel default: 530175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel BUG(); 531175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel } 532175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel } else { 533028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel set_pri_tag_status(fault->state, fault->tag, PPR_INVALID); 534175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel } 535028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 536028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel finish_pri_tag(fault->dev_state, fault->state, fault->tag); 537028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 538028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel put_pasid_state(fault->state); 539028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 540028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel kfree(fault); 541028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel} 542028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 543028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedelstatic int ppr_notifier(struct notifier_block *nb, unsigned long e, void *data) 544028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel{ 545028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel struct amd_iommu_fault *iommu_fault; 546028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel struct pasid_state *pasid_state; 547028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel struct device_state *dev_state; 548028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel unsigned long flags; 549028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel struct fault *fault; 550028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel bool finish; 551028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel u16 tag; 552028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel int ret; 553028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 554028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel iommu_fault = data; 555028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel tag = iommu_fault->tag & 0x1ff; 556028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel finish = (iommu_fault->tag >> 9) & 1; 557028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 558028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel ret = NOTIFY_DONE; 559028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel dev_state = get_device_state(iommu_fault->device_id); 560028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel if (dev_state == NULL) 561028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel goto out; 562028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 563028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel pasid_state = get_pasid_state(dev_state, iommu_fault->pasid); 564028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel if (pasid_state == NULL) { 565028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel /* We know the device but not the PASID -> send INVALID */ 566028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel amd_iommu_complete_ppr(dev_state->pdev, iommu_fault->pasid, 567028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel PPR_INVALID, tag); 568028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel goto out_drop_state; 569028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel } 570028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 571028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel spin_lock_irqsave(&pasid_state->lock, flags); 572028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel atomic_inc(&pasid_state->pri[tag].inflight); 573028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel if (finish) 574028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel pasid_state->pri[tag].finish = true; 575028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel spin_unlock_irqrestore(&pasid_state->lock, flags); 576028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 577028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel fault = kzalloc(sizeof(*fault), GFP_ATOMIC); 578028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel if (fault == NULL) { 579028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel /* We are OOM - send success and let the device re-fault */ 580028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel finish_pri_tag(dev_state, pasid_state, tag); 581028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel goto out_drop_state; 582028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel } 583028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 584028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel fault->dev_state = dev_state; 585028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel fault->address = iommu_fault->address; 586028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel fault->state = pasid_state; 587028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel fault->tag = tag; 588028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel fault->finish = finish; 589028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel fault->flags = iommu_fault->flags; 590028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel INIT_WORK(&fault->work, do_fault); 591028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 592028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel queue_work(iommu_wq, &fault->work); 593028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 594028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel ret = NOTIFY_OK; 595028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 596028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedelout_drop_state: 597028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel put_device_state(dev_state); 598028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 599028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedelout: 600028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel return ret; 601028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel} 602028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 603028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedelstatic struct notifier_block ppr_nb = { 604028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel .notifier_call = ppr_notifier, 605028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel}; 606028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 6078736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedelstatic int task_exit(struct notifier_block *nb, unsigned long e, void *data) 6088736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel{ 6098736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel struct pasid_state *pasid_state; 6108736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel struct task_struct *task; 6118736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 6128736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel task = data; 6138736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 6148736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel /* 6158736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel * Using this notifier is a hack - but there is no other choice 6168736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel * at the moment. What I really want is a sleeping notifier that 6178736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel * is called when an MM goes down. But such a notifier doesn't 6188736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel * exist yet. The notifier needs to sleep because it has to make 6198736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel * sure that the device does not use the PASID and the address 6208736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel * space anymore before it is destroyed. This includes waiting 6218736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel * for pending PRI requests to pass the workqueue. The 6228736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel * MMU-Notifiers would be a good fit, but they use RCU and so 6238736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel * they are not allowed to sleep. Lets see how we can solve this 6248736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel * in a more intelligent way in the future. 6258736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel */ 6268736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedelagain: 6278736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel spin_lock(&ps_lock); 6288736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel list_for_each_entry(pasid_state, &pasid_state_list, list) { 6298736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel struct device_state *dev_state; 6308736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel int pasid; 6318736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 6328736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel if (pasid_state->task != task) 6338736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel continue; 6348736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 6358736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel /* Drop Lock and unbind */ 6368736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel spin_unlock(&ps_lock); 6378736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 6388736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel dev_state = pasid_state->device_state; 6398736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel pasid = pasid_state->pasid; 6408736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 641bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel if (pasid_state->device_state->inv_ctx_cb) 642bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel dev_state->inv_ctx_cb(dev_state->pdev, pasid); 643bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel 6448736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel unbind_pasid(dev_state, pasid); 6458736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 6468736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel /* Task may be in the list multiple times */ 6478736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel goto again; 6488736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel } 6498736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel spin_unlock(&ps_lock); 6508736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 6518736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel return NOTIFY_OK; 6528736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel} 6538736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 6542d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelint amd_iommu_bind_pasid(struct pci_dev *pdev, int pasid, 6552d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel struct task_struct *task) 6562d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel{ 6572d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel struct pasid_state *pasid_state; 6582d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel struct device_state *dev_state; 6592d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel u16 devid; 6602d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel int ret; 6612d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 6622d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel might_sleep(); 6632d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 6642d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (!amd_iommu_v2_supported()) 6652d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel return -ENODEV; 6662d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 6672d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel devid = device_id(pdev); 6682d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel dev_state = get_device_state(devid); 6692d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 6702d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (dev_state == NULL) 6712d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel return -EINVAL; 6722d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 6732d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel ret = -EINVAL; 6742d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (pasid < 0 || pasid >= dev_state->max_pasids) 6752d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel goto out; 6762d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 6772d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel ret = -ENOMEM; 6782d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel pasid_state = kzalloc(sizeof(*pasid_state), GFP_KERNEL); 6792d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (pasid_state == NULL) 6802d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel goto out; 6812d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 6822d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel atomic_set(&pasid_state->count, 1); 683028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel init_waitqueue_head(&pasid_state->wq); 6842d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel pasid_state->task = task; 6852d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel pasid_state->mm = get_task_mm(task); 6862d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel pasid_state->device_state = dev_state; 6872d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel pasid_state->pasid = pasid; 6888736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel pasid_state->mn.ops = &iommu_mn; 6892d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 6902d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (pasid_state->mm == NULL) 6912d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel goto out_free; 6922d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 6938736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel mmu_notifier_register(&pasid_state->mn, pasid_state->mm); 6948736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 6952d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel ret = set_pasid_state(dev_state, pasid_state, pasid); 6962d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (ret) 6978736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel goto out_unregister; 6982d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 6992d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel ret = amd_iommu_domain_set_gcr3(dev_state->domain, pasid, 7002d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel __pa(pasid_state->mm->pgd)); 7012d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (ret) 7022d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel goto out_clear_state; 7032d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 7042d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel link_pasid_state(pasid_state); 7052d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 7062d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel return 0; 7072d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 7082d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelout_clear_state: 7092d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel clear_pasid_state(dev_state, pasid); 7102d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 7118736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedelout_unregister: 7128736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel mmu_notifier_unregister(&pasid_state->mn, pasid_state->mm); 7138736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 7142d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelout_free: 715028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel free_pasid_state(pasid_state); 7162d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 7172d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelout: 7182d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel put_device_state(dev_state); 7192d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 7202d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel return ret; 7212d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel} 7222d5503b624736abfe0e0bad281f9b8d8a705b930Joerg RoedelEXPORT_SYMBOL(amd_iommu_bind_pasid); 7232d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 7242d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelvoid amd_iommu_unbind_pasid(struct pci_dev *pdev, int pasid) 7252d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel{ 7262d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel struct device_state *dev_state; 7272d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel u16 devid; 7282d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 7292d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel might_sleep(); 7302d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 7312d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (!amd_iommu_v2_supported()) 7322d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel return; 7332d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 7342d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel devid = device_id(pdev); 7352d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel dev_state = get_device_state(devid); 7362d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (dev_state == NULL) 7372d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel return; 7382d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 7392d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel if (pasid < 0 || pasid >= dev_state->max_pasids) 7402d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel goto out; 7412d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 7422d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel unbind_pasid(dev_state, pasid); 7432d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 7442d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedelout: 7452d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel put_device_state(dev_state); 7462d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel} 7472d5503b624736abfe0e0bad281f9b8d8a705b930Joerg RoedelEXPORT_SYMBOL(amd_iommu_unbind_pasid); 7482d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 749ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedelint amd_iommu_init_device(struct pci_dev *pdev, int pasids) 750ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel{ 751ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel struct device_state *dev_state; 752ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel unsigned long flags; 753ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel int ret, tmp; 754ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel u16 devid; 755ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 756ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel might_sleep(); 757ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 758ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel if (!amd_iommu_v2_supported()) 759ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel return -ENODEV; 760ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 761ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel if (pasids <= 0 || pasids > (PASID_MASK + 1)) 762ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel return -EINVAL; 763ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 764ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel devid = device_id(pdev); 765ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 766ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel dev_state = kzalloc(sizeof(*dev_state), GFP_KERNEL); 767ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel if (dev_state == NULL) 768ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel return -ENOMEM; 769ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 770ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel spin_lock_init(&dev_state->lock); 771028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel init_waitqueue_head(&dev_state->wq); 772ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel dev_state->pdev = pdev; 773ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 774ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel tmp = pasids; 775ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel for (dev_state->pasid_levels = 0; (tmp - 1) & ~0x1ff; tmp >>= 9) 776ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel dev_state->pasid_levels += 1; 777ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 778ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel atomic_set(&dev_state->count, 1); 779ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel dev_state->max_pasids = pasids; 780ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 781ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel ret = -ENOMEM; 782ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel dev_state->states = (void *)get_zeroed_page(GFP_KERNEL); 783ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel if (dev_state->states == NULL) 784ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel goto out_free_dev_state; 785ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 786ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel dev_state->domain = iommu_domain_alloc(&pci_bus_type); 787ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel if (dev_state->domain == NULL) 788ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel goto out_free_states; 789ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 790ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel amd_iommu_domain_direct_map(dev_state->domain); 791ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 792ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel ret = amd_iommu_domain_enable_v2(dev_state->domain, pasids); 793ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel if (ret) 794ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel goto out_free_domain; 795ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 796ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel ret = iommu_attach_device(dev_state->domain, &pdev->dev); 797ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel if (ret != 0) 798ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel goto out_free_domain; 799ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 800ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel spin_lock_irqsave(&state_lock, flags); 801ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 802ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel if (state_table[devid] != NULL) { 803ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel spin_unlock_irqrestore(&state_lock, flags); 804ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel ret = -EBUSY; 805ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel goto out_free_domain; 806ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel } 807ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 808ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel state_table[devid] = dev_state; 809ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 810ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel spin_unlock_irqrestore(&state_lock, flags); 811ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 812ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel return 0; 813ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 814ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedelout_free_domain: 815ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel iommu_domain_free(dev_state->domain); 816ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 817ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedelout_free_states: 818ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel free_page((unsigned long)dev_state->states); 819ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 820ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedelout_free_dev_state: 821ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel kfree(dev_state); 822ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 823ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel return ret; 824ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel} 825ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg RoedelEXPORT_SYMBOL(amd_iommu_init_device); 826ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 827ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedelvoid amd_iommu_free_device(struct pci_dev *pdev) 828ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel{ 829ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel struct device_state *dev_state; 830ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel unsigned long flags; 831ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel u16 devid; 832ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 833ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel if (!amd_iommu_v2_supported()) 834ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel return; 835ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 836ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel devid = device_id(pdev); 837ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 838ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel spin_lock_irqsave(&state_lock, flags); 839ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 840ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel dev_state = state_table[devid]; 841ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel if (dev_state == NULL) { 842ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel spin_unlock_irqrestore(&state_lock, flags); 843ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel return; 844ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel } 845ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 846ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel state_table[devid] = NULL; 847ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 848ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel spin_unlock_irqrestore(&state_lock, flags); 849ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 8502d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel /* Get rid of any remaining pasid states */ 8512d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel free_pasid_states(dev_state); 8522d5503b624736abfe0e0bad281f9b8d8a705b930Joerg Roedel 853028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel put_device_state_wait(dev_state); 854ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel} 855ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg RoedelEXPORT_SYMBOL(amd_iommu_free_device); 856ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 857175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedelint amd_iommu_set_invalid_ppr_cb(struct pci_dev *pdev, 858175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel amd_iommu_invalid_ppr_cb cb) 859175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel{ 860175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel struct device_state *dev_state; 861175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel unsigned long flags; 862175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel u16 devid; 863175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel int ret; 864175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel 865175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel if (!amd_iommu_v2_supported()) 866175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel return -ENODEV; 867175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel 868175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel devid = device_id(pdev); 869175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel 870175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel spin_lock_irqsave(&state_lock, flags); 871175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel 872175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel ret = -EINVAL; 873175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel dev_state = state_table[devid]; 874175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel if (dev_state == NULL) 875175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel goto out_unlock; 876175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel 877175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel dev_state->inv_ppr_cb = cb; 878175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel 879175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel ret = 0; 880175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel 881175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedelout_unlock: 882175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel spin_unlock_irqrestore(&state_lock, flags); 883175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel 884175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel return ret; 885175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel} 886175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg RoedelEXPORT_SYMBOL(amd_iommu_set_invalid_ppr_cb); 887175d6146738b3d04e1adcaa4a971a3b2b0dbd8afJoerg Roedel 888bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedelint amd_iommu_set_invalidate_ctx_cb(struct pci_dev *pdev, 889bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel amd_iommu_invalidate_ctx cb) 890bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel{ 891bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel struct device_state *dev_state; 892bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel unsigned long flags; 893bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel u16 devid; 894bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel int ret; 895bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel 896bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel if (!amd_iommu_v2_supported()) 897bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel return -ENODEV; 898bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel 899bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel devid = device_id(pdev); 900bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel 901bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel spin_lock_irqsave(&state_lock, flags); 902bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel 903bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel ret = -EINVAL; 904bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel dev_state = state_table[devid]; 905bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel if (dev_state == NULL) 906bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel goto out_unlock; 907bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel 908bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel dev_state->inv_ctx_cb = cb; 909bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel 910bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel ret = 0; 911bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel 912bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedelout_unlock: 913bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel spin_unlock_irqrestore(&state_lock, flags); 914bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel 915bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel return ret; 916bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel} 917bc21662f729cd17d2af93e149f4eccafc7b10181Joerg RoedelEXPORT_SYMBOL(amd_iommu_set_invalidate_ctx_cb); 918bc21662f729cd17d2af93e149f4eccafc7b10181Joerg Roedel 919e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedelstatic int __init amd_iommu_v2_init(void) 920e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel{ 921ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel size_t state_table_size; 922028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel int ret; 923ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 924474d567db3d459d08ed0e683f4ace9b00ac2aa4bJoerg Roedel pr_info("AMD IOMMUv2 driver by Joerg Roedel <joerg.roedel@amd.com>\n"); 925474d567db3d459d08ed0e683f4ace9b00ac2aa4bJoerg Roedel 926474d567db3d459d08ed0e683f4ace9b00ac2aa4bJoerg Roedel if (!amd_iommu_v2_supported()) { 927474d567db3d459d08ed0e683f4ace9b00ac2aa4bJoerg Roedel pr_info("AMD IOMMUv2 functionality not available on this sytem\n"); 928474d567db3d459d08ed0e683f4ace9b00ac2aa4bJoerg Roedel /* 929474d567db3d459d08ed0e683f4ace9b00ac2aa4bJoerg Roedel * Load anyway to provide the symbols to other modules 930474d567db3d459d08ed0e683f4ace9b00ac2aa4bJoerg Roedel * which may use AMD IOMMUv2 optionally. 931474d567db3d459d08ed0e683f4ace9b00ac2aa4bJoerg Roedel */ 932474d567db3d459d08ed0e683f4ace9b00ac2aa4bJoerg Roedel return 0; 933474d567db3d459d08ed0e683f4ace9b00ac2aa4bJoerg Roedel } 934e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel 935ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel spin_lock_init(&state_lock); 936ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 937ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel state_table_size = MAX_DEVICES * sizeof(struct device_state *); 938ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel state_table = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 939ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel get_order(state_table_size)); 940ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel if (state_table == NULL) 941ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel return -ENOMEM; 942ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 943028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel ret = -ENOMEM; 944028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel iommu_wq = create_workqueue("amd_iommu_v2"); 9458736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel if (iommu_wq == NULL) 946028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel goto out_free; 9478736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 9488736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel ret = -ENOMEM; 9498736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel empty_page_table = (u64 *)get_zeroed_page(GFP_KERNEL); 9508736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel if (empty_page_table == NULL) 9518736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel goto out_destroy_wq; 952028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 953028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel amd_iommu_register_ppr_notifier(&ppr_nb); 9548736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel profile_event_register(PROFILE_TASK_EXIT, &profile_nb); 955028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 956e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel return 0; 957028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 9588736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedelout_destroy_wq: 9598736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel destroy_workqueue(iommu_wq); 9608736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 961028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedelout_free: 962028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel free_pages((unsigned long)state_table, get_order(state_table_size)); 963028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 964028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel return ret; 965e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel} 966e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel 967e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedelstatic void __exit amd_iommu_v2_exit(void) 968e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel{ 969ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel struct device_state *dev_state; 970ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel size_t state_table_size; 971ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel int i; 972ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 973474d567db3d459d08ed0e683f4ace9b00ac2aa4bJoerg Roedel if (!amd_iommu_v2_supported()) 974474d567db3d459d08ed0e683f4ace9b00ac2aa4bJoerg Roedel return; 975474d567db3d459d08ed0e683f4ace9b00ac2aa4bJoerg Roedel 9768736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel profile_event_unregister(PROFILE_TASK_EXIT, &profile_nb); 977028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel amd_iommu_unregister_ppr_notifier(&ppr_nb); 978028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 979028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel flush_workqueue(iommu_wq); 980028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 981028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel /* 982028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel * The loop below might call flush_workqueue(), so call 983028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel * destroy_workqueue() after it 984028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel */ 985ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel for (i = 0; i < MAX_DEVICES; ++i) { 986ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel dev_state = get_device_state(i); 987ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 988ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel if (dev_state == NULL) 989ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel continue; 990ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 991ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel WARN_ON_ONCE(1); 992ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 993ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel put_device_state(dev_state); 994028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel amd_iommu_free_device(dev_state->pdev); 995ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel } 996ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel 997028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel destroy_workqueue(iommu_wq); 998028eeacc412a8bebf6711e58629b0cab56a9ba87Joerg Roedel 999ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel state_table_size = MAX_DEVICES * sizeof(struct device_state *); 1000ed96f228ba9725edf69385bffdc19ee5bb0ec641Joerg Roedel free_pages((unsigned long)state_table, get_order(state_table_size)); 10018736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel 10028736b2c331030733c5d619170dc6e9ef211a4039Joerg Roedel free_page((unsigned long)empty_page_table); 1003e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel} 1004e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedel 1005e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedelmodule_init(amd_iommu_v2_init); 1006e3c495c74bc008a5c3671bf3411bc7f5382fa58fJoerg Roedelmodule_exit(amd_iommu_v2_exit); 1007