mirror of
https://github.com/torvalds/linux.git
synced 2024-12-05 10:32:35 +00:00
d8ed45c5dc
This change converts the existing mmap_sem rwsem calls to use the new mmap locking API instead. The change is generated using coccinelle with the following rule: // spatch --sp-file mmap_lock_api.cocci --in-place --include-headers --dir . @@ expression mm; @@ ( -init_rwsem +mmap_init_lock | -down_write +mmap_write_lock | -down_write_killable +mmap_write_lock_killable | -down_write_trylock +mmap_write_trylock | -up_write +mmap_write_unlock | -downgrade_write +mmap_write_downgrade | -down_read +mmap_read_lock | -down_read_killable +mmap_read_lock_killable | -down_read_trylock +mmap_read_trylock | -up_read +mmap_read_unlock ) -(&mm->mmap_sem) +(mm) Signed-off-by: Michel Lespinasse <walken@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com> Reviewed-by: Laurent Dufour <ldufour@linux.ibm.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Cc: Davidlohr Bueso <dbueso@suse.de> Cc: David Rientjes <rientjes@google.com> Cc: Hugh Dickins <hughd@google.com> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: Jerome Glisse <jglisse@redhat.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Liam Howlett <Liam.Howlett@oracle.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ying Han <yinghan@google.com> Link: http://lkml.kernel.org/r/20200520052908.204642-5-walken@google.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1013 lines
27 KiB
C
1013 lines
27 KiB
C
/*
|
|
* Copyright 2018 Red Hat Inc.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
|
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
#include "nouveau_svm.h"
|
|
#include "nouveau_drv.h"
|
|
#include "nouveau_chan.h"
|
|
#include "nouveau_dmem.h"
|
|
|
|
#include <nvif/notify.h>
|
|
#include <nvif/object.h>
|
|
#include <nvif/vmm.h>
|
|
|
|
#include <nvif/class.h>
|
|
#include <nvif/clb069.h>
|
|
#include <nvif/ifc00d.h>
|
|
|
|
#include <linux/sched/mm.h>
|
|
#include <linux/sort.h>
|
|
#include <linux/hmm.h>
|
|
|
|
struct nouveau_svm {
|
|
struct nouveau_drm *drm;
|
|
struct mutex mutex;
|
|
struct list_head inst;
|
|
|
|
struct nouveau_svm_fault_buffer {
|
|
int id;
|
|
struct nvif_object object;
|
|
u32 entries;
|
|
u32 getaddr;
|
|
u32 putaddr;
|
|
u32 get;
|
|
u32 put;
|
|
struct nvif_notify notify;
|
|
|
|
struct nouveau_svm_fault {
|
|
u64 inst;
|
|
u64 addr;
|
|
u64 time;
|
|
u32 engine;
|
|
u8 gpc;
|
|
u8 hub;
|
|
u8 access;
|
|
u8 client;
|
|
u8 fault;
|
|
struct nouveau_svmm *svmm;
|
|
} **fault;
|
|
int fault_nr;
|
|
} buffer[1];
|
|
};
|
|
|
|
#define SVM_DBG(s,f,a...) NV_DEBUG((s)->drm, "svm: "f"\n", ##a)
|
|
#define SVM_ERR(s,f,a...) NV_WARN((s)->drm, "svm: "f"\n", ##a)
|
|
|
|
struct nouveau_pfnmap_args {
|
|
struct nvif_ioctl_v0 i;
|
|
struct nvif_ioctl_mthd_v0 m;
|
|
struct nvif_vmm_pfnmap_v0 p;
|
|
};
|
|
|
|
struct nouveau_ivmm {
|
|
struct nouveau_svmm *svmm;
|
|
u64 inst;
|
|
struct list_head head;
|
|
};
|
|
|
|
static struct nouveau_ivmm *
|
|
nouveau_ivmm_find(struct nouveau_svm *svm, u64 inst)
|
|
{
|
|
struct nouveau_ivmm *ivmm;
|
|
list_for_each_entry(ivmm, &svm->inst, head) {
|
|
if (ivmm->inst == inst)
|
|
return ivmm;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
struct nouveau_svmm {
|
|
struct mmu_notifier notifier;
|
|
struct nouveau_vmm *vmm;
|
|
struct {
|
|
unsigned long start;
|
|
unsigned long limit;
|
|
} unmanaged;
|
|
|
|
struct mutex mutex;
|
|
};
|
|
|
|
#define SVMM_DBG(s,f,a...) \
|
|
NV_DEBUG((s)->vmm->cli->drm, "svm-%p: "f"\n", (s), ##a)
|
|
#define SVMM_ERR(s,f,a...) \
|
|
NV_WARN((s)->vmm->cli->drm, "svm-%p: "f"\n", (s), ##a)
|
|
|
|
int
|
|
nouveau_svmm_bind(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct nouveau_cli *cli = nouveau_cli(file_priv);
|
|
struct drm_nouveau_svm_bind *args = data;
|
|
unsigned target, cmd, priority;
|
|
unsigned long addr, end, size;
|
|
struct mm_struct *mm;
|
|
|
|
args->va_start &= PAGE_MASK;
|
|
args->va_end &= PAGE_MASK;
|
|
|
|
/* Sanity check arguments */
|
|
if (args->reserved0 || args->reserved1)
|
|
return -EINVAL;
|
|
if (args->header & (~NOUVEAU_SVM_BIND_VALID_MASK))
|
|
return -EINVAL;
|
|
if (args->va_start >= args->va_end)
|
|
return -EINVAL;
|
|
if (!args->npages)
|
|
return -EINVAL;
|
|
|
|
cmd = args->header >> NOUVEAU_SVM_BIND_COMMAND_SHIFT;
|
|
cmd &= NOUVEAU_SVM_BIND_COMMAND_MASK;
|
|
switch (cmd) {
|
|
case NOUVEAU_SVM_BIND_COMMAND__MIGRATE:
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
priority = args->header >> NOUVEAU_SVM_BIND_PRIORITY_SHIFT;
|
|
priority &= NOUVEAU_SVM_BIND_PRIORITY_MASK;
|
|
|
|
/* FIXME support CPU target ie all target value < GPU_VRAM */
|
|
target = args->header >> NOUVEAU_SVM_BIND_TARGET_SHIFT;
|
|
target &= NOUVEAU_SVM_BIND_TARGET_MASK;
|
|
switch (target) {
|
|
case NOUVEAU_SVM_BIND_TARGET__GPU_VRAM:
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* FIXME: For now refuse non 0 stride, we need to change the migrate
|
|
* kernel function to handle stride to avoid to create a mess within
|
|
* each device driver.
|
|
*/
|
|
if (args->stride)
|
|
return -EINVAL;
|
|
|
|
size = ((unsigned long)args->npages) << PAGE_SHIFT;
|
|
if ((args->va_start + size) <= args->va_start)
|
|
return -EINVAL;
|
|
if ((args->va_start + size) > args->va_end)
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* Ok we are ask to do something sane, for now we only support migrate
|
|
* commands but we will add things like memory policy (what to do on
|
|
* page fault) and maybe some other commands.
|
|
*/
|
|
|
|
mm = get_task_mm(current);
|
|
mmap_read_lock(mm);
|
|
|
|
if (!cli->svm.svmm) {
|
|
mmap_read_unlock(mm);
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (addr = args->va_start, end = args->va_start + size; addr < end;) {
|
|
struct vm_area_struct *vma;
|
|
unsigned long next;
|
|
|
|
vma = find_vma_intersection(mm, addr, end);
|
|
if (!vma)
|
|
break;
|
|
|
|
addr = max(addr, vma->vm_start);
|
|
next = min(vma->vm_end, end);
|
|
/* This is a best effort so we ignore errors */
|
|
nouveau_dmem_migrate_vma(cli->drm, cli->svm.svmm, vma, addr,
|
|
next);
|
|
addr = next;
|
|
}
|
|
|
|
/*
|
|
* FIXME Return the number of page we have migrated, again we need to
|
|
* update the migrate API to return that information so that we can
|
|
* report it to user space.
|
|
*/
|
|
args->result = 0;
|
|
|
|
mmap_read_unlock(mm);
|
|
mmput(mm);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Unlink channel instance from SVMM. */
|
|
void
|
|
nouveau_svmm_part(struct nouveau_svmm *svmm, u64 inst)
|
|
{
|
|
struct nouveau_ivmm *ivmm;
|
|
if (svmm) {
|
|
mutex_lock(&svmm->vmm->cli->drm->svm->mutex);
|
|
ivmm = nouveau_ivmm_find(svmm->vmm->cli->drm->svm, inst);
|
|
if (ivmm) {
|
|
list_del(&ivmm->head);
|
|
kfree(ivmm);
|
|
}
|
|
mutex_unlock(&svmm->vmm->cli->drm->svm->mutex);
|
|
}
|
|
}
|
|
|
|
/* Link channel instance to SVMM. */
|
|
int
|
|
nouveau_svmm_join(struct nouveau_svmm *svmm, u64 inst)
|
|
{
|
|
struct nouveau_ivmm *ivmm;
|
|
if (svmm) {
|
|
if (!(ivmm = kmalloc(sizeof(*ivmm), GFP_KERNEL)))
|
|
return -ENOMEM;
|
|
ivmm->svmm = svmm;
|
|
ivmm->inst = inst;
|
|
|
|
mutex_lock(&svmm->vmm->cli->drm->svm->mutex);
|
|
list_add(&ivmm->head, &svmm->vmm->cli->drm->svm->inst);
|
|
mutex_unlock(&svmm->vmm->cli->drm->svm->mutex);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Invalidate SVMM address-range on GPU. */
|
|
static void
|
|
nouveau_svmm_invalidate(struct nouveau_svmm *svmm, u64 start, u64 limit)
|
|
{
|
|
if (limit > start) {
|
|
bool super = svmm->vmm->vmm.object.client->super;
|
|
svmm->vmm->vmm.object.client->super = true;
|
|
nvif_object_mthd(&svmm->vmm->vmm.object, NVIF_VMM_V0_PFNCLR,
|
|
&(struct nvif_vmm_pfnclr_v0) {
|
|
.addr = start,
|
|
.size = limit - start,
|
|
}, sizeof(struct nvif_vmm_pfnclr_v0));
|
|
svmm->vmm->vmm.object.client->super = super;
|
|
}
|
|
}
|
|
|
|
static int
|
|
nouveau_svmm_invalidate_range_start(struct mmu_notifier *mn,
|
|
const struct mmu_notifier_range *update)
|
|
{
|
|
struct nouveau_svmm *svmm =
|
|
container_of(mn, struct nouveau_svmm, notifier);
|
|
unsigned long start = update->start;
|
|
unsigned long limit = update->end;
|
|
|
|
if (!mmu_notifier_range_blockable(update))
|
|
return -EAGAIN;
|
|
|
|
SVMM_DBG(svmm, "invalidate %016lx-%016lx", start, limit);
|
|
|
|
mutex_lock(&svmm->mutex);
|
|
if (unlikely(!svmm->vmm))
|
|
goto out;
|
|
|
|
if (limit > svmm->unmanaged.start && start < svmm->unmanaged.limit) {
|
|
if (start < svmm->unmanaged.start) {
|
|
nouveau_svmm_invalidate(svmm, start,
|
|
svmm->unmanaged.limit);
|
|
}
|
|
start = svmm->unmanaged.limit;
|
|
}
|
|
|
|
nouveau_svmm_invalidate(svmm, start, limit);
|
|
|
|
out:
|
|
mutex_unlock(&svmm->mutex);
|
|
return 0;
|
|
}
|
|
|
|
static void nouveau_svmm_free_notifier(struct mmu_notifier *mn)
|
|
{
|
|
kfree(container_of(mn, struct nouveau_svmm, notifier));
|
|
}
|
|
|
|
static const struct mmu_notifier_ops nouveau_mn_ops = {
|
|
.invalidate_range_start = nouveau_svmm_invalidate_range_start,
|
|
.free_notifier = nouveau_svmm_free_notifier,
|
|
};
|
|
|
|
void
|
|
nouveau_svmm_fini(struct nouveau_svmm **psvmm)
|
|
{
|
|
struct nouveau_svmm *svmm = *psvmm;
|
|
if (svmm) {
|
|
mutex_lock(&svmm->mutex);
|
|
svmm->vmm = NULL;
|
|
mutex_unlock(&svmm->mutex);
|
|
mmu_notifier_put(&svmm->notifier);
|
|
*psvmm = NULL;
|
|
}
|
|
}
|
|
|
|
int
|
|
nouveau_svmm_init(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct nouveau_cli *cli = nouveau_cli(file_priv);
|
|
struct nouveau_svmm *svmm;
|
|
struct drm_nouveau_svm_init *args = data;
|
|
int ret;
|
|
|
|
/* Allocate tracking for SVM-enabled VMM. */
|
|
if (!(svmm = kzalloc(sizeof(*svmm), GFP_KERNEL)))
|
|
return -ENOMEM;
|
|
svmm->vmm = &cli->svm;
|
|
svmm->unmanaged.start = args->unmanaged_addr;
|
|
svmm->unmanaged.limit = args->unmanaged_addr + args->unmanaged_size;
|
|
mutex_init(&svmm->mutex);
|
|
|
|
/* Check that SVM isn't already enabled for the client. */
|
|
mutex_lock(&cli->mutex);
|
|
if (cli->svm.cli) {
|
|
ret = -EBUSY;
|
|
goto out_free;
|
|
}
|
|
|
|
/* Allocate a new GPU VMM that can support SVM (managed by the
|
|
* client, with replayable faults enabled).
|
|
*
|
|
* All future channel/memory allocations will make use of this
|
|
* VMM instead of the standard one.
|
|
*/
|
|
ret = nvif_vmm_init(&cli->mmu, cli->vmm.vmm.object.oclass, true,
|
|
args->unmanaged_addr, args->unmanaged_size,
|
|
&(struct gp100_vmm_v0) {
|
|
.fault_replay = true,
|
|
}, sizeof(struct gp100_vmm_v0), &cli->svm.vmm);
|
|
if (ret)
|
|
goto out_free;
|
|
|
|
mmap_write_lock(current->mm);
|
|
svmm->notifier.ops = &nouveau_mn_ops;
|
|
ret = __mmu_notifier_register(&svmm->notifier, current->mm);
|
|
if (ret)
|
|
goto out_mm_unlock;
|
|
/* Note, ownership of svmm transfers to mmu_notifier */
|
|
|
|
cli->svm.svmm = svmm;
|
|
cli->svm.cli = cli;
|
|
mmap_write_unlock(current->mm);
|
|
mutex_unlock(&cli->mutex);
|
|
return 0;
|
|
|
|
out_mm_unlock:
|
|
mmap_write_unlock(current->mm);
|
|
out_free:
|
|
mutex_unlock(&cli->mutex);
|
|
kfree(svmm);
|
|
return ret;
|
|
}
|
|
|
|
/* Issue fault replay for GPU to retry accesses that faulted previously. */
|
|
static void
|
|
nouveau_svm_fault_replay(struct nouveau_svm *svm)
|
|
{
|
|
SVM_DBG(svm, "replay");
|
|
WARN_ON(nvif_object_mthd(&svm->drm->client.vmm.vmm.object,
|
|
GP100_VMM_VN_FAULT_REPLAY,
|
|
&(struct gp100_vmm_fault_replay_vn) {},
|
|
sizeof(struct gp100_vmm_fault_replay_vn)));
|
|
}
|
|
|
|
/* Cancel a replayable fault that could not be handled.
|
|
*
|
|
* Cancelling the fault will trigger recovery to reset the engine
|
|
* and kill the offending channel (ie. GPU SIGSEGV).
|
|
*/
|
|
static void
|
|
nouveau_svm_fault_cancel(struct nouveau_svm *svm,
|
|
u64 inst, u8 hub, u8 gpc, u8 client)
|
|
{
|
|
SVM_DBG(svm, "cancel %016llx %d %02x %02x", inst, hub, gpc, client);
|
|
WARN_ON(nvif_object_mthd(&svm->drm->client.vmm.vmm.object,
|
|
GP100_VMM_VN_FAULT_CANCEL,
|
|
&(struct gp100_vmm_fault_cancel_v0) {
|
|
.hub = hub,
|
|
.gpc = gpc,
|
|
.client = client,
|
|
.inst = inst,
|
|
}, sizeof(struct gp100_vmm_fault_cancel_v0)));
|
|
}
|
|
|
|
static void
|
|
nouveau_svm_fault_cancel_fault(struct nouveau_svm *svm,
|
|
struct nouveau_svm_fault *fault)
|
|
{
|
|
nouveau_svm_fault_cancel(svm, fault->inst,
|
|
fault->hub,
|
|
fault->gpc,
|
|
fault->client);
|
|
}
|
|
|
|
static int
|
|
nouveau_svm_fault_cmp(const void *a, const void *b)
|
|
{
|
|
const struct nouveau_svm_fault *fa = *(struct nouveau_svm_fault **)a;
|
|
const struct nouveau_svm_fault *fb = *(struct nouveau_svm_fault **)b;
|
|
int ret;
|
|
if ((ret = (s64)fa->inst - fb->inst))
|
|
return ret;
|
|
if ((ret = (s64)fa->addr - fb->addr))
|
|
return ret;
|
|
/*XXX: atomic? */
|
|
return (fa->access == 0 || fa->access == 3) -
|
|
(fb->access == 0 || fb->access == 3);
|
|
}
|
|
|
|
static void
|
|
nouveau_svm_fault_cache(struct nouveau_svm *svm,
|
|
struct nouveau_svm_fault_buffer *buffer, u32 offset)
|
|
{
|
|
struct nvif_object *memory = &buffer->object;
|
|
const u32 instlo = nvif_rd32(memory, offset + 0x00);
|
|
const u32 insthi = nvif_rd32(memory, offset + 0x04);
|
|
const u32 addrlo = nvif_rd32(memory, offset + 0x08);
|
|
const u32 addrhi = nvif_rd32(memory, offset + 0x0c);
|
|
const u32 timelo = nvif_rd32(memory, offset + 0x10);
|
|
const u32 timehi = nvif_rd32(memory, offset + 0x14);
|
|
const u32 engine = nvif_rd32(memory, offset + 0x18);
|
|
const u32 info = nvif_rd32(memory, offset + 0x1c);
|
|
const u64 inst = (u64)insthi << 32 | instlo;
|
|
const u8 gpc = (info & 0x1f000000) >> 24;
|
|
const u8 hub = (info & 0x00100000) >> 20;
|
|
const u8 client = (info & 0x00007f00) >> 8;
|
|
struct nouveau_svm_fault *fault;
|
|
|
|
//XXX: i think we're supposed to spin waiting */
|
|
if (WARN_ON(!(info & 0x80000000)))
|
|
return;
|
|
|
|
nvif_mask(memory, offset + 0x1c, 0x80000000, 0x00000000);
|
|
|
|
if (!buffer->fault[buffer->fault_nr]) {
|
|
fault = kmalloc(sizeof(*fault), GFP_KERNEL);
|
|
if (WARN_ON(!fault)) {
|
|
nouveau_svm_fault_cancel(svm, inst, hub, gpc, client);
|
|
return;
|
|
}
|
|
buffer->fault[buffer->fault_nr] = fault;
|
|
}
|
|
|
|
fault = buffer->fault[buffer->fault_nr++];
|
|
fault->inst = inst;
|
|
fault->addr = (u64)addrhi << 32 | addrlo;
|
|
fault->time = (u64)timehi << 32 | timelo;
|
|
fault->engine = engine;
|
|
fault->gpc = gpc;
|
|
fault->hub = hub;
|
|
fault->access = (info & 0x000f0000) >> 16;
|
|
fault->client = client;
|
|
fault->fault = (info & 0x0000001f);
|
|
|
|
SVM_DBG(svm, "fault %016llx %016llx %02x",
|
|
fault->inst, fault->addr, fault->access);
|
|
}
|
|
|
|
struct svm_notifier {
|
|
struct mmu_interval_notifier notifier;
|
|
struct nouveau_svmm *svmm;
|
|
};
|
|
|
|
static bool nouveau_svm_range_invalidate(struct mmu_interval_notifier *mni,
|
|
const struct mmu_notifier_range *range,
|
|
unsigned long cur_seq)
|
|
{
|
|
struct svm_notifier *sn =
|
|
container_of(mni, struct svm_notifier, notifier);
|
|
|
|
/*
|
|
* serializes the update to mni->invalidate_seq done by caller and
|
|
* prevents invalidation of the PTE from progressing while HW is being
|
|
* programmed. This is very hacky and only works because the normal
|
|
* notifier that does invalidation is always called after the range
|
|
* notifier.
|
|
*/
|
|
if (mmu_notifier_range_blockable(range))
|
|
mutex_lock(&sn->svmm->mutex);
|
|
else if (!mutex_trylock(&sn->svmm->mutex))
|
|
return false;
|
|
mmu_interval_set_seq(mni, cur_seq);
|
|
mutex_unlock(&sn->svmm->mutex);
|
|
return true;
|
|
}
|
|
|
|
static const struct mmu_interval_notifier_ops nouveau_svm_mni_ops = {
|
|
.invalidate = nouveau_svm_range_invalidate,
|
|
};
|
|
|
|
static void nouveau_hmm_convert_pfn(struct nouveau_drm *drm,
|
|
struct hmm_range *range, u64 *ioctl_addr)
|
|
{
|
|
unsigned long i, npages;
|
|
|
|
/*
|
|
* The ioctl_addr prepared here is passed through nvif_object_ioctl()
|
|
* to an eventual DMA map in something like gp100_vmm_pgt_pfn()
|
|
*
|
|
* This is all just encoding the internal hmm representation into a
|
|
* different nouveau internal representation.
|
|
*/
|
|
npages = (range->end - range->start) >> PAGE_SHIFT;
|
|
for (i = 0; i < npages; ++i) {
|
|
struct page *page;
|
|
|
|
if (!(range->hmm_pfns[i] & HMM_PFN_VALID)) {
|
|
ioctl_addr[i] = 0;
|
|
continue;
|
|
}
|
|
|
|
page = hmm_pfn_to_page(range->hmm_pfns[i]);
|
|
if (is_device_private_page(page))
|
|
ioctl_addr[i] = nouveau_dmem_page_addr(page) |
|
|
NVIF_VMM_PFNMAP_V0_V |
|
|
NVIF_VMM_PFNMAP_V0_VRAM;
|
|
else
|
|
ioctl_addr[i] = page_to_phys(page) |
|
|
NVIF_VMM_PFNMAP_V0_V |
|
|
NVIF_VMM_PFNMAP_V0_HOST;
|
|
if (range->hmm_pfns[i] & HMM_PFN_WRITE)
|
|
ioctl_addr[i] |= NVIF_VMM_PFNMAP_V0_W;
|
|
}
|
|
}
|
|
|
|
static int nouveau_range_fault(struct nouveau_svmm *svmm,
|
|
struct nouveau_drm *drm, void *data, u32 size,
|
|
unsigned long hmm_pfns[], u64 *ioctl_addr,
|
|
struct svm_notifier *notifier)
|
|
{
|
|
unsigned long timeout =
|
|
jiffies + msecs_to_jiffies(HMM_RANGE_DEFAULT_TIMEOUT);
|
|
/* Have HMM fault pages within the fault window to the GPU. */
|
|
struct hmm_range range = {
|
|
.notifier = ¬ifier->notifier,
|
|
.start = notifier->notifier.interval_tree.start,
|
|
.end = notifier->notifier.interval_tree.last + 1,
|
|
.pfn_flags_mask = HMM_PFN_REQ_FAULT | HMM_PFN_REQ_WRITE,
|
|
.hmm_pfns = hmm_pfns,
|
|
};
|
|
struct mm_struct *mm = notifier->notifier.mm;
|
|
int ret;
|
|
|
|
while (true) {
|
|
if (time_after(jiffies, timeout))
|
|
return -EBUSY;
|
|
|
|
range.notifier_seq = mmu_interval_read_begin(range.notifier);
|
|
mmap_read_lock(mm);
|
|
ret = hmm_range_fault(&range);
|
|
mmap_read_unlock(mm);
|
|
if (ret) {
|
|
/*
|
|
* FIXME: the input PFN_REQ flags are destroyed on
|
|
* -EBUSY, we need to regenerate them, also for the
|
|
* other continue below
|
|
*/
|
|
if (ret == -EBUSY)
|
|
continue;
|
|
return ret;
|
|
}
|
|
|
|
mutex_lock(&svmm->mutex);
|
|
if (mmu_interval_read_retry(range.notifier,
|
|
range.notifier_seq)) {
|
|
mutex_unlock(&svmm->mutex);
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
nouveau_hmm_convert_pfn(drm, &range, ioctl_addr);
|
|
|
|
svmm->vmm->vmm.object.client->super = true;
|
|
ret = nvif_object_ioctl(&svmm->vmm->vmm.object, data, size, NULL);
|
|
svmm->vmm->vmm.object.client->super = false;
|
|
mutex_unlock(&svmm->mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
nouveau_svm_fault(struct nvif_notify *notify)
|
|
{
|
|
struct nouveau_svm_fault_buffer *buffer =
|
|
container_of(notify, typeof(*buffer), notify);
|
|
struct nouveau_svm *svm =
|
|
container_of(buffer, typeof(*svm), buffer[buffer->id]);
|
|
struct nvif_object *device = &svm->drm->client.device.object;
|
|
struct nouveau_svmm *svmm;
|
|
struct {
|
|
struct {
|
|
struct nvif_ioctl_v0 i;
|
|
struct nvif_ioctl_mthd_v0 m;
|
|
struct nvif_vmm_pfnmap_v0 p;
|
|
} i;
|
|
u64 phys[16];
|
|
} args;
|
|
unsigned long hmm_pfns[ARRAY_SIZE(args.phys)];
|
|
struct vm_area_struct *vma;
|
|
u64 inst, start, limit;
|
|
int fi, fn, pi, fill;
|
|
int replay = 0, ret;
|
|
|
|
/* Parse available fault buffer entries into a cache, and update
|
|
* the GET pointer so HW can reuse the entries.
|
|
*/
|
|
SVM_DBG(svm, "fault handler");
|
|
if (buffer->get == buffer->put) {
|
|
buffer->put = nvif_rd32(device, buffer->putaddr);
|
|
buffer->get = nvif_rd32(device, buffer->getaddr);
|
|
if (buffer->get == buffer->put)
|
|
return NVIF_NOTIFY_KEEP;
|
|
}
|
|
buffer->fault_nr = 0;
|
|
|
|
SVM_DBG(svm, "get %08x put %08x", buffer->get, buffer->put);
|
|
while (buffer->get != buffer->put) {
|
|
nouveau_svm_fault_cache(svm, buffer, buffer->get * 0x20);
|
|
if (++buffer->get == buffer->entries)
|
|
buffer->get = 0;
|
|
}
|
|
nvif_wr32(device, buffer->getaddr, buffer->get);
|
|
SVM_DBG(svm, "%d fault(s) pending", buffer->fault_nr);
|
|
|
|
/* Sort parsed faults by instance pointer to prevent unnecessary
|
|
* instance to SVMM translations, followed by address and access
|
|
* type to reduce the amount of work when handling the faults.
|
|
*/
|
|
sort(buffer->fault, buffer->fault_nr, sizeof(*buffer->fault),
|
|
nouveau_svm_fault_cmp, NULL);
|
|
|
|
/* Lookup SVMM structure for each unique instance pointer. */
|
|
mutex_lock(&svm->mutex);
|
|
for (fi = 0, svmm = NULL; fi < buffer->fault_nr; fi++) {
|
|
if (!svmm || buffer->fault[fi]->inst != inst) {
|
|
struct nouveau_ivmm *ivmm =
|
|
nouveau_ivmm_find(svm, buffer->fault[fi]->inst);
|
|
svmm = ivmm ? ivmm->svmm : NULL;
|
|
inst = buffer->fault[fi]->inst;
|
|
SVM_DBG(svm, "inst %016llx -> svm-%p", inst, svmm);
|
|
}
|
|
buffer->fault[fi]->svmm = svmm;
|
|
}
|
|
mutex_unlock(&svm->mutex);
|
|
|
|
/* Process list of faults. */
|
|
args.i.i.version = 0;
|
|
args.i.i.type = NVIF_IOCTL_V0_MTHD;
|
|
args.i.m.version = 0;
|
|
args.i.m.method = NVIF_VMM_V0_PFNMAP;
|
|
args.i.p.version = 0;
|
|
|
|
for (fi = 0; fn = fi + 1, fi < buffer->fault_nr; fi = fn) {
|
|
struct svm_notifier notifier;
|
|
struct mm_struct *mm;
|
|
|
|
/* Cancel any faults from non-SVM channels. */
|
|
if (!(svmm = buffer->fault[fi]->svmm)) {
|
|
nouveau_svm_fault_cancel_fault(svm, buffer->fault[fi]);
|
|
continue;
|
|
}
|
|
SVMM_DBG(svmm, "addr %016llx", buffer->fault[fi]->addr);
|
|
|
|
/* We try and group handling of faults within a small
|
|
* window into a single update.
|
|
*/
|
|
start = buffer->fault[fi]->addr;
|
|
limit = start + (ARRAY_SIZE(args.phys) << PAGE_SHIFT);
|
|
if (start < svmm->unmanaged.limit)
|
|
limit = min_t(u64, limit, svmm->unmanaged.start);
|
|
SVMM_DBG(svmm, "wndw %016llx-%016llx", start, limit);
|
|
|
|
mm = svmm->notifier.mm;
|
|
if (!mmget_not_zero(mm)) {
|
|
nouveau_svm_fault_cancel_fault(svm, buffer->fault[fi]);
|
|
continue;
|
|
}
|
|
|
|
/* Intersect fault window with the CPU VMA, cancelling
|
|
* the fault if the address is invalid.
|
|
*/
|
|
mmap_read_lock(mm);
|
|
vma = find_vma_intersection(mm, start, limit);
|
|
if (!vma) {
|
|
SVMM_ERR(svmm, "wndw %016llx-%016llx", start, limit);
|
|
mmap_read_unlock(mm);
|
|
mmput(mm);
|
|
nouveau_svm_fault_cancel_fault(svm, buffer->fault[fi]);
|
|
continue;
|
|
}
|
|
start = max_t(u64, start, vma->vm_start);
|
|
limit = min_t(u64, limit, vma->vm_end);
|
|
mmap_read_unlock(mm);
|
|
SVMM_DBG(svmm, "wndw %016llx-%016llx", start, limit);
|
|
|
|
if (buffer->fault[fi]->addr != start) {
|
|
SVMM_ERR(svmm, "addr %016llx", buffer->fault[fi]->addr);
|
|
mmput(mm);
|
|
nouveau_svm_fault_cancel_fault(svm, buffer->fault[fi]);
|
|
continue;
|
|
}
|
|
|
|
/* Prepare the GPU-side update of all pages within the
|
|
* fault window, determining required pages and access
|
|
* permissions based on pending faults.
|
|
*/
|
|
args.i.p.page = PAGE_SHIFT;
|
|
args.i.p.addr = start;
|
|
for (fn = fi, pi = 0;;) {
|
|
/* Determine required permissions based on GPU fault
|
|
* access flags.
|
|
*XXX: atomic?
|
|
*/
|
|
switch (buffer->fault[fn]->access) {
|
|
case 0: /* READ. */
|
|
hmm_pfns[pi++] = HMM_PFN_REQ_FAULT;
|
|
break;
|
|
case 3: /* PREFETCH. */
|
|
hmm_pfns[pi++] = 0;
|
|
break;
|
|
default:
|
|
hmm_pfns[pi++] = HMM_PFN_REQ_FAULT |
|
|
HMM_PFN_REQ_WRITE;
|
|
break;
|
|
}
|
|
args.i.p.size = pi << PAGE_SHIFT;
|
|
|
|
/* It's okay to skip over duplicate addresses from the
|
|
* same SVMM as faults are ordered by access type such
|
|
* that only the first one needs to be handled.
|
|
*
|
|
* ie. WRITE faults appear first, thus any handling of
|
|
* pending READ faults will already be satisfied.
|
|
*/
|
|
while (++fn < buffer->fault_nr &&
|
|
buffer->fault[fn]->svmm == svmm &&
|
|
buffer->fault[fn ]->addr ==
|
|
buffer->fault[fn - 1]->addr);
|
|
|
|
/* If the next fault is outside the window, or all GPU
|
|
* faults have been dealt with, we're done here.
|
|
*/
|
|
if (fn >= buffer->fault_nr ||
|
|
buffer->fault[fn]->svmm != svmm ||
|
|
buffer->fault[fn]->addr >= limit)
|
|
break;
|
|
|
|
/* Fill in the gap between this fault and the next. */
|
|
fill = (buffer->fault[fn ]->addr -
|
|
buffer->fault[fn - 1]->addr) >> PAGE_SHIFT;
|
|
while (--fill)
|
|
hmm_pfns[pi++] = 0;
|
|
}
|
|
|
|
SVMM_DBG(svmm, "wndw %016llx-%016llx covering %d fault(s)",
|
|
args.i.p.addr,
|
|
args.i.p.addr + args.i.p.size, fn - fi);
|
|
|
|
notifier.svmm = svmm;
|
|
ret = mmu_interval_notifier_insert(¬ifier.notifier,
|
|
svmm->notifier.mm,
|
|
args.i.p.addr, args.i.p.size,
|
|
&nouveau_svm_mni_ops);
|
|
if (!ret) {
|
|
ret = nouveau_range_fault(
|
|
svmm, svm->drm, &args,
|
|
sizeof(args.i) + pi * sizeof(args.phys[0]),
|
|
hmm_pfns, args.phys, ¬ifier);
|
|
mmu_interval_notifier_remove(¬ifier.notifier);
|
|
}
|
|
mmput(mm);
|
|
|
|
/* Cancel any faults in the window whose pages didn't manage
|
|
* to keep their valid bit, or stay writeable when required.
|
|
*
|
|
* If handling failed completely, cancel all faults.
|
|
*/
|
|
while (fi < fn) {
|
|
struct nouveau_svm_fault *fault = buffer->fault[fi++];
|
|
pi = (fault->addr - args.i.p.addr) >> PAGE_SHIFT;
|
|
if (ret ||
|
|
!(args.phys[pi] & NVIF_VMM_PFNMAP_V0_V) ||
|
|
(!(args.phys[pi] & NVIF_VMM_PFNMAP_V0_W) &&
|
|
fault->access != 0 && fault->access != 3)) {
|
|
nouveau_svm_fault_cancel_fault(svm, fault);
|
|
continue;
|
|
}
|
|
replay++;
|
|
}
|
|
}
|
|
|
|
/* Issue fault replay to the GPU. */
|
|
if (replay)
|
|
nouveau_svm_fault_replay(svm);
|
|
return NVIF_NOTIFY_KEEP;
|
|
}
|
|
|
|
static struct nouveau_pfnmap_args *
|
|
nouveau_pfns_to_args(void *pfns)
|
|
{
|
|
return container_of(pfns, struct nouveau_pfnmap_args, p.phys);
|
|
}
|
|
|
|
u64 *
|
|
nouveau_pfns_alloc(unsigned long npages)
|
|
{
|
|
struct nouveau_pfnmap_args *args;
|
|
|
|
args = kzalloc(struct_size(args, p.phys, npages), GFP_KERNEL);
|
|
if (!args)
|
|
return NULL;
|
|
|
|
args->i.type = NVIF_IOCTL_V0_MTHD;
|
|
args->m.method = NVIF_VMM_V0_PFNMAP;
|
|
args->p.page = PAGE_SHIFT;
|
|
|
|
return args->p.phys;
|
|
}
|
|
|
|
void
|
|
nouveau_pfns_free(u64 *pfns)
|
|
{
|
|
struct nouveau_pfnmap_args *args = nouveau_pfns_to_args(pfns);
|
|
|
|
kfree(args);
|
|
}
|
|
|
|
void
|
|
nouveau_pfns_map(struct nouveau_svmm *svmm, struct mm_struct *mm,
|
|
unsigned long addr, u64 *pfns, unsigned long npages)
|
|
{
|
|
struct nouveau_pfnmap_args *args = nouveau_pfns_to_args(pfns);
|
|
int ret;
|
|
|
|
args->p.addr = addr;
|
|
args->p.size = npages << PAGE_SHIFT;
|
|
|
|
mutex_lock(&svmm->mutex);
|
|
|
|
svmm->vmm->vmm.object.client->super = true;
|
|
ret = nvif_object_ioctl(&svmm->vmm->vmm.object, args, sizeof(*args) +
|
|
npages * sizeof(args->p.phys[0]), NULL);
|
|
svmm->vmm->vmm.object.client->super = false;
|
|
|
|
mutex_unlock(&svmm->mutex);
|
|
}
|
|
|
|
static void
|
|
nouveau_svm_fault_buffer_fini(struct nouveau_svm *svm, int id)
|
|
{
|
|
struct nouveau_svm_fault_buffer *buffer = &svm->buffer[id];
|
|
nvif_notify_put(&buffer->notify);
|
|
}
|
|
|
|
static int
|
|
nouveau_svm_fault_buffer_init(struct nouveau_svm *svm, int id)
|
|
{
|
|
struct nouveau_svm_fault_buffer *buffer = &svm->buffer[id];
|
|
struct nvif_object *device = &svm->drm->client.device.object;
|
|
buffer->get = nvif_rd32(device, buffer->getaddr);
|
|
buffer->put = nvif_rd32(device, buffer->putaddr);
|
|
SVM_DBG(svm, "get %08x put %08x (init)", buffer->get, buffer->put);
|
|
return nvif_notify_get(&buffer->notify);
|
|
}
|
|
|
|
static void
|
|
nouveau_svm_fault_buffer_dtor(struct nouveau_svm *svm, int id)
|
|
{
|
|
struct nouveau_svm_fault_buffer *buffer = &svm->buffer[id];
|
|
int i;
|
|
|
|
if (buffer->fault) {
|
|
for (i = 0; buffer->fault[i] && i < buffer->entries; i++)
|
|
kfree(buffer->fault[i]);
|
|
kvfree(buffer->fault);
|
|
}
|
|
|
|
nouveau_svm_fault_buffer_fini(svm, id);
|
|
|
|
nvif_notify_fini(&buffer->notify);
|
|
nvif_object_fini(&buffer->object);
|
|
}
|
|
|
|
static int
|
|
nouveau_svm_fault_buffer_ctor(struct nouveau_svm *svm, s32 oclass, int id)
|
|
{
|
|
struct nouveau_svm_fault_buffer *buffer = &svm->buffer[id];
|
|
struct nouveau_drm *drm = svm->drm;
|
|
struct nvif_object *device = &drm->client.device.object;
|
|
struct nvif_clb069_v0 args = {};
|
|
int ret;
|
|
|
|
buffer->id = id;
|
|
|
|
ret = nvif_object_init(device, 0, oclass, &args, sizeof(args),
|
|
&buffer->object);
|
|
if (ret < 0) {
|
|
SVM_ERR(svm, "Fault buffer allocation failed: %d", ret);
|
|
return ret;
|
|
}
|
|
|
|
nvif_object_map(&buffer->object, NULL, 0);
|
|
buffer->entries = args.entries;
|
|
buffer->getaddr = args.get;
|
|
buffer->putaddr = args.put;
|
|
|
|
ret = nvif_notify_init(&buffer->object, nouveau_svm_fault, true,
|
|
NVB069_V0_NTFY_FAULT, NULL, 0, 0,
|
|
&buffer->notify);
|
|
if (ret)
|
|
return ret;
|
|
|
|
buffer->fault = kvzalloc(sizeof(*buffer->fault) * buffer->entries, GFP_KERNEL);
|
|
if (!buffer->fault)
|
|
return -ENOMEM;
|
|
|
|
return nouveau_svm_fault_buffer_init(svm, id);
|
|
}
|
|
|
|
void
|
|
nouveau_svm_resume(struct nouveau_drm *drm)
|
|
{
|
|
struct nouveau_svm *svm = drm->svm;
|
|
if (svm)
|
|
nouveau_svm_fault_buffer_init(svm, 0);
|
|
}
|
|
|
|
void
|
|
nouveau_svm_suspend(struct nouveau_drm *drm)
|
|
{
|
|
struct nouveau_svm *svm = drm->svm;
|
|
if (svm)
|
|
nouveau_svm_fault_buffer_fini(svm, 0);
|
|
}
|
|
|
|
void
|
|
nouveau_svm_fini(struct nouveau_drm *drm)
|
|
{
|
|
struct nouveau_svm *svm = drm->svm;
|
|
if (svm) {
|
|
nouveau_svm_fault_buffer_dtor(svm, 0);
|
|
kfree(drm->svm);
|
|
drm->svm = NULL;
|
|
}
|
|
}
|
|
|
|
void
|
|
nouveau_svm_init(struct nouveau_drm *drm)
|
|
{
|
|
static const struct nvif_mclass buffers[] = {
|
|
{ VOLTA_FAULT_BUFFER_A, 0 },
|
|
{ MAXWELL_FAULT_BUFFER_A, 0 },
|
|
{}
|
|
};
|
|
struct nouveau_svm *svm;
|
|
int ret;
|
|
|
|
/* Disable on Volta and newer until channel recovery is fixed,
|
|
* otherwise clients will have a trivial way to trash the GPU
|
|
* for everyone.
|
|
*/
|
|
if (drm->client.device.info.family > NV_DEVICE_INFO_V0_PASCAL)
|
|
return;
|
|
|
|
if (!(drm->svm = svm = kzalloc(sizeof(*drm->svm), GFP_KERNEL)))
|
|
return;
|
|
|
|
drm->svm->drm = drm;
|
|
mutex_init(&drm->svm->mutex);
|
|
INIT_LIST_HEAD(&drm->svm->inst);
|
|
|
|
ret = nvif_mclass(&drm->client.device.object, buffers);
|
|
if (ret < 0) {
|
|
SVM_DBG(svm, "No supported fault buffer class");
|
|
nouveau_svm_fini(drm);
|
|
return;
|
|
}
|
|
|
|
ret = nouveau_svm_fault_buffer_ctor(svm, buffers[ret].oclass, 0);
|
|
if (ret) {
|
|
nouveau_svm_fini(drm);
|
|
return;
|
|
}
|
|
|
|
SVM_DBG(svm, "Initialised");
|
|
}
|