tree: git://people.freedesktop.org/~agd5f/linux.git amd-mainline-dkms-5.2
head: a48b0cc1cdf3900e3e73801f9de64afbb70dc193
commit: 607b18ba116eb1642b01fb9d38a164cc492e9044 [2158/2834] drm/amdkcl: Test whether vm_fault->{address/vma} is available
config: x86_64-randconfig-a004-201944 (attached as .config)
compiler: gcc-5 (Ubuntu 5.5.0-12ubuntu1) 5.5.0 20171010
reproduce:
git checkout 607b18ba116eb1642b01fb9d38a164cc492e9044
# save the attached .config to linux build tree
make ARCH=x86_64
If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@xxxxxxxxx>
All errors (new ones prefixed by >>):
In file included from include/linux/kobject.h:23:0,
from include/linux/device.h:16,
from include/drm/drm_print.h:32,
from include/drm/drm_mm.h:49,
from include/drm/drm_vma_manager.h:26,
from include/kcl/kcl_drm_vma_manager.h:8,
from drivers/gpu/drm/ttm/backport/backport.h:5,
from <command-line>:0:
include/linux/kref.h:36:28: note: previous definition of 'kref_read' was here
static inline unsigned int kref_read(const struct kref *kref)
^
In file included from drivers/gpu/drm/ttm/backport/backport.h:11:0,
from <command-line>:0:
include/kcl/kcl_kref.h: In function 'kref_read':
include/kcl/kcl_kref.h:9:21: error: passing argument 1 of 'atomic_read' from incompatible pointer type [-Werror=incompatible-pointer-types]
return atomic_read(&kref->refcount);
^
In file included from arch/x86/include/asm/atomic.h:265:0,
from include/linux/atomic.h:7,
from include/linux/rcupdate.h:25,
from include/linux/rbtree.h:34,
from include/drm/drm_mm.h:41,
from include/drm/drm_vma_manager.h:26,
from include/kcl/kcl_drm_vma_manager.h:8,
from drivers/gpu/drm/ttm/backport/backport.h:5,
from <command-line>:0:
include/asm-generic/atomic-instrumented.h:24:1: note: expected 'const atomic_t * {aka const struct <anonymous> *}' but argument is of type 'const refcount_t * {aka const struct refcount_struct *}'
atomic_read(const atomic_t *v)
^
In file included from drivers/gpu/drm/ttm/backport/backport.h:12:0,
from <command-line>:0:
include/kcl/kcl_mm_types.h: At top level:
include/kcl/kcl_mm_types.h:10:3: error: conflicting types for 'pfn_t'
} pfn_t;
^
In file included from include/asm-generic/memory_model.h:5:0,
from arch/x86/include/asm/page.h:76,
from arch/x86/include/asm/thread_info.h:12,
from include/linux/thread_info.h:38,
from arch/x86/include/asm/preempt.h:7,
from include/linux/preempt.h:78,
from include/linux/rcupdate.h:27,
from include/linux/rbtree.h:34,
from include/drm/drm_mm.h:41,
from include/drm/drm_vma_manager.h:26,
from include/kcl/kcl_drm_vma_manager.h:8,
from drivers/gpu/drm/ttm/backport/backport.h:5,
from <command-line>:0:
include/linux/pfn.h:15:3: note: previous declaration of 'pfn_t' was here
} pfn_t;
^
In file included from drivers/gpu/drm/ttm/backport/backport.h:12:0,
from <command-line>:0:
include/kcl/kcl_mm_types.h:33:13: error: conflicting types for 'vm_fault_t'
typedef int vm_fault_t;
^
In file included from include/drm/drm_mm.h:43:0,
from include/drm/drm_vma_manager.h:26,
from include/kcl/kcl_drm_vma_manager.h:8,
from drivers/gpu/drm/ttm/backport/backport.h:5,
from <command-line>:0:
include/linux/mm_types.h:631:32: note: previous declaration of 'vm_fault_t' was here
typedef __bitwise unsigned int vm_fault_t;
^
In file included from drivers/gpu/drm/ttm/backport/backport.h:12:0,
from <command-line>:0:
include/kcl/kcl_mm_types.h:35:26: error: conflicting types for 'vmf_insert_mixed'
static inline vm_fault_t vmf_insert_mixed(struct vm_area_struct *vma,
^
In file included from include/drm/drm_vma_manager.h:27:0,
from include/kcl/kcl_drm_vma_manager.h:8,
from drivers/gpu/drm/ttm/backport/backport.h:5,
from <command-line>:0:
include/linux/mm.h:2587:12: note: previous declaration of 'vmf_insert_mixed' was here
vm_fault_t vmf_insert_mixed(struct vm_area_struct *vma, unsigned long addr,
^
In file included from drivers/gpu/drm/ttm/backport/backport.h:12:0,
from <command-line>:0:
include/kcl/kcl_mm_types.h: In function 'vmf_insert_mixed':
include/kcl/kcl_mm_types.h:41:8: error: implicit declaration of function 'vm_insert_mixed' [-Werror=implicit-function-declaration]
err = vm_insert_mixed(vma, addr, pfn_t_to_pfn(pfn));
^
include/kcl/kcl_mm_types.h: At top level:
include/kcl/kcl_mm_types.h:53:26: error: conflicting types for 'vmf_insert_pfn'
static inline vm_fault_t vmf_insert_pfn(struct vm_area_struct *vma,
^
In file included from include/drm/drm_vma_manager.h:27:0,
from include/kcl/kcl_drm_vma_manager.h:8,
from drivers/gpu/drm/ttm/backport/backport.h:5,
from <command-line>:0:
include/linux/mm.h:2583:12: note: previous declaration of 'vmf_insert_pfn' was here
vm_fault_t vmf_insert_pfn(struct vm_area_struct *vma, unsigned long addr,
^
In file included from drivers/gpu/drm/ttm/backport/backport.h:12:0,
from <command-line>:0:
include/kcl/kcl_mm_types.h: In function 'vmf_insert_pfn':
include/kcl/kcl_mm_types.h:56:13: error: implicit declaration of function 'vm_insert_pfn' [-Werror=implicit-function-declaration]
int err = vm_insert_pfn(vma, addr, pfn);
^
drivers/gpu/drm/ttm/ttm_bo_vm.c: In function 'ttm_bo_vm_fault':
>> drivers/gpu/drm/ttm/ttm_bo_vm.c:128:6: error: 'vma' undeclared (first use in this function)
vma->vm_private_data;
^
drivers/gpu/drm/ttm/ttm_bo_vm.c:128:6: note: each undeclared identifier is reported only once for each function it appears in
drivers/gpu/drm/ttm/ttm_bo_vm.c:139:44: error: 'struct vm_fault' has no member named 'virtual_address'
unsigned long address = (unsigned long)vmf->virtual_address;
^
drivers/gpu/drm/ttm/ttm_bo_vm.c: At top level:
drivers/gpu/drm/ttm/ttm_bo_vm.c:427:11: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
.fault = ttm_bo_vm_fault,
^
drivers/gpu/drm/ttm/ttm_bo_vm.c:427:11: note: (near initialization for 'ttm_bo_vm_ops.fault')
cc1: some warnings being treated as errors
vim +/vma +128 drivers/gpu/drm/ttm/ttm_bo_vm.c
cbe12e74ee4e29 Thomas Hellstrom 2013-10-09 106
c67fa6edc8b11a Tan Xiaojun 2017-12-25 107 static unsigned long ttm_bo_io_mem_pfn(struct ttm_buffer_object *bo,
c67fa6edc8b11a Tan Xiaojun 2017-12-25 108 unsigned long page_offset)
c67fa6edc8b11a Tan Xiaojun 2017-12-25 109 {
c67fa6edc8b11a Tan Xiaojun 2017-12-25 110 struct ttm_bo_device *bdev = bo->bdev;
c67fa6edc8b11a Tan Xiaojun 2017-12-25 111
c67fa6edc8b11a Tan Xiaojun 2017-12-25 112 if (bdev->driver->io_mem_pfn)
c67fa6edc8b11a Tan Xiaojun 2017-12-25 113 return bdev->driver->io_mem_pfn(bo, page_offset);
c67fa6edc8b11a Tan Xiaojun 2017-12-25 114
e83bf4adf54ad3 Tan Xiaojun 2017-12-25 115 return ((bo->mem.bus.base + bo->mem.bus.offset) >> PAGE_SHIFT)
e83bf4adf54ad3 Tan Xiaojun 2017-12-25 116 + page_offset;
c67fa6edc8b11a Tan Xiaojun 2017-12-25 117 }
c502e3166db12d Anatoli Antonovitch 2019-06-26 118 #if defined(HAVE_2ARGS_VIRTUAL_MM_FAULT_FUNCTION)
2880a38f4d3cf2 Evan Quan 2017-05-12 119 static vm_fault_t ttm_bo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
2880a38f4d3cf2 Evan Quan 2017-05-12 120 #else
4daa4fba3a3899 Souptick Joarder 2018-06-02 121 static vm_fault_t ttm_bo_vm_fault(struct vm_fault *vmf)
2880a38f4d3cf2 Evan Quan 2017-05-12 122 #endif
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 123 {
607b18ba116eb1 Chengming Gui 2019-09-02 124 #if defined(HAVE_VM_FAULT_ADDRESS_VMA)
11bac80004499e Dave Jiang 2017-02-24 125 struct vm_area_struct *vma = vmf->vma;
2880a38f4d3cf2 Evan Quan 2017-05-12 126 #endif
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 127 struct ttm_buffer_object *bo = (struct ttm_buffer_object *)
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 @128 vma->vm_private_data;
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 129 struct ttm_bo_device *bdev = bo->bdev;
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 130 unsigned long page_offset;
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 131 unsigned long page_last;
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 132 unsigned long pfn;
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 133 struct ttm_tt *ttm = NULL;
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 134 struct page *page;
4daa4fba3a3899 Souptick Joarder 2018-06-02 135 int err;
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 136 int i;
4daa4fba3a3899 Souptick Joarder 2018-06-02 137 vm_fault_t ret = VM_FAULT_NOPAGE;
607b18ba116eb1 Chengming Gui 2019-09-02 138 #ifndef HAVE_VM_FAULT_ADDRESS_VMA
2880a38f4d3cf2 Evan Quan 2017-05-12 139 unsigned long address = (unsigned long)vmf->virtual_address;
2880a38f4d3cf2 Evan Quan 2017-05-12 140 #else
1a29d85eb0f19b Jan Kara 2016-12-14 141 unsigned long address = vmf->address;
2880a38f4d3cf2 Evan Quan 2017-05-12 142 #endif
eba67093f53532 Thomas Hellstrom 2010-11-11 143 struct ttm_mem_type_manager *man =
eba67093f53532 Thomas Hellstrom 2010-11-11 144 &bdev->man[bo->mem.mem_type];
3943875e7b73fd Thomas Hellstrom 2013-11-06 145 struct vm_area_struct cvma;
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 146
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 147 /*
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 148 * Work around locking order reversal in fault / nopfn
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 149 * between mmap_sem and bo_reserve: Perform a trylock operation
c58f009e01c918 Thomas Hellstrom 2013-11-14 150 * for reserve, and if it fails, retry the fault after waiting
c58f009e01c918 Thomas Hellstrom 2013-11-14 151 * for the buffer to become unreserved.
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 152 */
7e18f7a415538c Evan Quan 2019-02-18 153 if (unlikely(!kcl_reservation_object_trylock(bo->resv))) {
c58f009e01c918 Thomas Hellstrom 2013-11-14 154 if (vmf->flags & FAULT_FLAG_ALLOW_RETRY) {
0251eb85af434f Chengming Gui 2019-08-28 155 #ifdef FAULT_FLAG_RETRY_NOWAIT
c58f009e01c918 Thomas Hellstrom 2013-11-14 156 if (!(vmf->flags & FAULT_FLAG_RETRY_NOWAIT)) {
8129fdad387ae3 Thomas Zimmermann 2018-06-21 157 ttm_bo_get(bo);
2880a38f4d3cf2 Evan Quan 2017-05-12 158 up_read(&vma->vm_mm->mmap_sem);
c58f009e01c918 Thomas Hellstrom 2013-11-14 159 (void) ttm_bo_wait_unreserved(bo);
f44907593d746d Thomas Zimmermann 2018-06-21 160 ttm_bo_put(bo);
c58f009e01c918 Thomas Hellstrom 2013-11-14 161 }
2880a38f4d3cf2 Evan Quan 2017-05-12 162 #else
2880a38f4d3cf2 Evan Quan 2017-05-12 163 up_read(&vma->vm_mm->mmap_sem);
2880a38f4d3cf2 Evan Quan 2017-05-12 164 #endif
c58f009e01c918 Thomas Hellstrom 2013-11-14 165
c58f009e01c918 Thomas Hellstrom 2013-11-14 166 return VM_FAULT_RETRY;
c58f009e01c918 Thomas Hellstrom 2013-11-14 167 }
c58f009e01c918 Thomas Hellstrom 2013-11-14 168
c58f009e01c918 Thomas Hellstrom 2013-11-14 169 /*
c58f009e01c918 Thomas Hellstrom 2013-11-14 170 * If we'd want to change locking order to
c58f009e01c918 Thomas Hellstrom 2013-11-14 171 * mmap_sem -> bo::reserve, we'd use a blocking reserve here
c58f009e01c918 Thomas Hellstrom 2013-11-14 172 * instead of retrying the fault...
c58f009e01c918 Thomas Hellstrom 2013-11-14 173 */
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 174 return VM_FAULT_NOPAGE;
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 175 }
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 176
667a50db0477d4 Thomas Hellstrom 2014-01-03 177 /*
667a50db0477d4 Thomas Hellstrom 2014-01-03 178 * Refuse to fault imported pages. This should be handled
667a50db0477d4 Thomas Hellstrom 2014-01-03 179 * (if at all) by redirecting mmap to the exporter.
667a50db0477d4 Thomas Hellstrom 2014-01-03 180 */
667a50db0477d4 Thomas Hellstrom 2014-01-03 181 if (bo->ttm && (bo->ttm->page_flags & TTM_PAGE_FLAG_SG)) {
de8dfb8e3449c7 Tom St Denis 2018-01-26 182 ret = VM_FAULT_SIGBUS;
667a50db0477d4 Thomas Hellstrom 2014-01-03 183 goto out_unlock;
667a50db0477d4 Thomas Hellstrom 2014-01-03 184 }
667a50db0477d4 Thomas Hellstrom 2014-01-03 185
82c5da6bf8b55a Jerome Glisse 2010-04-09 186 if (bdev->driver->fault_reserve_notify) {
5d50fcbda7b0ac Christian König 2019-01-11 187 struct dma_fence *moving = dma_fence_get(bo->moving);
5d50fcbda7b0ac Christian König 2019-01-11 188
4daa4fba3a3899 Souptick Joarder 2018-06-02 189 err = bdev->driver->fault_reserve_notify(bo);
4daa4fba3a3899 Souptick Joarder 2018-06-02 190 switch (err) {
82c5da6bf8b55a Jerome Glisse 2010-04-09 191 case 0:
82c5da6bf8b55a Jerome Glisse 2010-04-09 192 break;
82c5da6bf8b55a Jerome Glisse 2010-04-09 193 case -EBUSY:
82c5da6bf8b55a Jerome Glisse 2010-04-09 194 case -ERESTARTSYS:
de8dfb8e3449c7 Tom St Denis 2018-01-26 195 ret = VM_FAULT_NOPAGE;
82c5da6bf8b55a Jerome Glisse 2010-04-09 196 goto out_unlock;
82c5da6bf8b55a Jerome Glisse 2010-04-09 197 default:
de8dfb8e3449c7 Tom St Denis 2018-01-26 198 ret = VM_FAULT_SIGBUS;
82c5da6bf8b55a Jerome Glisse 2010-04-09 199 goto out_unlock;
82c5da6bf8b55a Jerome Glisse 2010-04-09 200 }
5d50fcbda7b0ac Christian König 2019-01-11 201
5d50fcbda7b0ac Christian König 2019-01-11 202 if (bo->moving != moving) {
5d50fcbda7b0ac Christian König 2019-01-11 203 spin_lock(&bdev->glob->lru_lock);
5d50fcbda7b0ac Christian König 2019-01-11 204 ttm_bo_move_to_lru_tail(bo, NULL);
5d50fcbda7b0ac Christian König 2019-01-11 205 spin_unlock(&bdev->glob->lru_lock);
5d50fcbda7b0ac Christian König 2019-01-11 206 }
5d50fcbda7b0ac Christian König 2019-01-11 207 dma_fence_put(moving);
82c5da6bf8b55a Jerome Glisse 2010-04-09 208 }
e024e11070a0a0 Dave Airlie 2009-06-24 209
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 210 /*
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 211 * Wait for buffer data in transit, due to a pipelined
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 212 * move.
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 213 */
2880a38f4d3cf2 Evan Quan 2017-05-12 214 ret = ttm_bo_vm_fault_idle(bo, vma, vmf);
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 215 if (unlikely(ret != 0)) {
0251eb85af434f Chengming Gui 2019-08-28 216 #ifdef FAULT_FLAG_RETRY_NOWAIT
de8dfb8e3449c7 Tom St Denis 2018-01-26 217 if (ret == VM_FAULT_RETRY &&
3089c1df10e293 Nicolai Hähnle 2017-02-18 218 !(vmf->flags & FAULT_FLAG_RETRY_NOWAIT)) {
2880a38f4d3cf2 Evan Quan 2017-05-12 219 #else
2880a38f4d3cf2 Evan Quan 2017-05-12 220 if (ret == VM_FAULT_RETRY) {
2880a38f4d3cf2 Evan Quan 2017-05-12 221 #endif
3089c1df10e293 Nicolai Hähnle 2017-02-18 222 /* The BO has already been unreserved. */
de8dfb8e3449c7 Tom St Denis 2018-01-26 223 return ret;
3089c1df10e293 Nicolai Hähnle 2017-02-18 224 }
3089c1df10e293 Nicolai Hähnle 2017-02-18 225
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 226 goto out_unlock;
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 227 }
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 228
4daa4fba3a3899 Souptick Joarder 2018-06-02 229 err = ttm_mem_io_lock(man, true);
4daa4fba3a3899 Souptick Joarder 2018-06-02 230 if (unlikely(err != 0)) {
de8dfb8e3449c7 Tom St Denis 2018-01-26 231 ret = VM_FAULT_NOPAGE;
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 232 goto out_unlock;
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 233 }
4daa4fba3a3899 Souptick Joarder 2018-06-02 234 err = ttm_mem_io_reserve_vm(bo);
4daa4fba3a3899 Souptick Joarder 2018-06-02 235 if (unlikely(err != 0)) {
de8dfb8e3449c7 Tom St Denis 2018-01-26 236 ret = VM_FAULT_SIGBUS;
eba67093f53532 Thomas Hellstrom 2010-11-11 237 goto out_io_unlock;
eba67093f53532 Thomas Hellstrom 2010-11-11 238 }
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 239
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 240 page_offset = ((address - vma->vm_start) >> PAGE_SHIFT) +
d386735588c3e2 Thomas Hellstrom 2013-12-08 241 vma->vm_pgoff - drm_vma_node_start(&bo->vma_node);
d386735588c3e2 Thomas Hellstrom 2013-12-08 242 page_last = vma_pages(vma) + vma->vm_pgoff -
d386735588c3e2 Thomas Hellstrom 2013-12-08 243 drm_vma_node_start(&bo->vma_node);
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 244
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 245 if (unlikely(page_offset >= bo->num_pages)) {
de8dfb8e3449c7 Tom St Denis 2018-01-26 246 ret = VM_FAULT_SIGBUS;
eba67093f53532 Thomas Hellstrom 2010-11-11 247 goto out_io_unlock;
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 248 }
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 249
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 250 /*
3943875e7b73fd Thomas Hellstrom 2013-11-06 251 * Make a local vma copy to modify the page_prot member
3943875e7b73fd Thomas Hellstrom 2013-11-06 252 * and vm_flags if necessary. The vma parameter is protected
3943875e7b73fd Thomas Hellstrom 2013-11-06 253 * by mmap_sem in write mode.
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 254 */
3943875e7b73fd Thomas Hellstrom 2013-11-06 255 cvma = *vma;
3943875e7b73fd Thomas Hellstrom 2013-11-06 256 cvma.vm_page_prot = vm_get_page_prot(cvma.vm_flags);
3943875e7b73fd Thomas Hellstrom 2013-11-06 257
82c5da6bf8b55a Jerome Glisse 2010-04-09 258 if (bo->mem.bus.is_iomem) {
3943875e7b73fd Thomas Hellstrom 2013-11-06 259 cvma.vm_page_prot = ttm_io_prot(bo->mem.placement,
3943875e7b73fd Thomas Hellstrom 2013-11-06 260 cvma.vm_page_prot);
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 261 } else {
d0cef9fa4411eb Roger He 2017-12-21 262 struct ttm_operation_ctx ctx = {
d0cef9fa4411eb Roger He 2017-12-21 263 .interruptible = false,
aa7662b67bf6f5 Roger He 2018-01-17 264 .no_wait_gpu = false,
aa7662b67bf6f5 Roger He 2018-01-17 265 .flags = TTM_OPT_FLAG_FORCE_ALLOC
aa7662b67bf6f5 Roger He 2018-01-17 266
d0cef9fa4411eb Roger He 2017-12-21 267 };
d0cef9fa4411eb Roger He 2017-12-21 268
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 269 ttm = bo->ttm;
3943875e7b73fd Thomas Hellstrom 2013-11-06 270 cvma.vm_page_prot = ttm_io_prot(bo->mem.placement,
3943875e7b73fd Thomas Hellstrom 2013-11-06 271 cvma.vm_page_prot);
b1e5f172325547 Jerome Glisse 2011-11-02 272
b1e5f172325547 Jerome Glisse 2011-11-02 273 /* Allocate all page at once, most common usage */
25893a14c938d5 Christian König 2018-02-01 274 if (ttm_tt_populate(ttm, &ctx)) {
de8dfb8e3449c7 Tom St Denis 2018-01-26 275 ret = VM_FAULT_OOM;
b1e5f172325547 Jerome Glisse 2011-11-02 276 goto out_io_unlock;
b1e5f172325547 Jerome Glisse 2011-11-02 277 }
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 278 }
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 279
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 280 /*
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 281 * Speculatively prefault a number of pages. Only error on
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 282 * first page.
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 283 */
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 284 for (i = 0; i < TTM_BO_VM_NUM_PREFAULT; ++i) {
95cf9264d5f36c Tom Lendacky 2017-07-17 285 if (bo->mem.bus.is_iomem) {
2880a38f4d3cf2 Evan Quan 2017-05-12 286 #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0)
95cf9264d5f36c Tom Lendacky 2017-07-17 287 /* Iomem should not be marked encrypted */
95cf9264d5f36c Tom Lendacky 2017-07-17 288 cvma.vm_page_prot = pgprot_decrypted(cvma.vm_page_prot);
2880a38f4d3cf2 Evan Quan 2017-05-12 289 #endif
c67fa6edc8b11a Tan Xiaojun 2017-12-25 290 pfn = ttm_bo_io_mem_pfn(bo, page_offset);
95cf9264d5f36c Tom Lendacky 2017-07-17 291 } else {
b1e5f172325547 Jerome Glisse 2011-11-02 292 page = ttm->pages[page_offset];
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 293 if (unlikely(!page && i == 0)) {
de8dfb8e3449c7 Tom St Denis 2018-01-26 294 ret = VM_FAULT_OOM;
eba67093f53532 Thomas Hellstrom 2010-11-11 295 goto out_io_unlock;
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 296 } else if (unlikely(!page)) {
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 297 break;
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 298 }
58aa6622d32af7 Thomas Hellstrom 2014-01-03 299 page->index = drm_vma_node_start(&bo->vma_node) +
58aa6622d32af7 Thomas Hellstrom 2014-01-03 300 page_offset;
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 301 pfn = page_to_pfn(page);
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 302 }
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 303
7dfe8b6187f43d Thomas Hellstrom 2014-01-03 304 if (vma->vm_flags & VM_MIXEDMAP)
4daa4fba3a3899 Souptick Joarder 2018-06-02 305 ret = vmf_insert_mixed(&cvma, address,
1663f01b82777b Qiang Yu 2018-08-22 306 __pfn_to_pfn_t(pfn, PFN_DEV | (bo->ssg_can_map ? PFN_MAP : 0)));
7dfe8b6187f43d Thomas Hellstrom 2014-01-03 307 else
4daa4fba3a3899 Souptick Joarder 2018-06-02 308 ret = vmf_insert_pfn(&cvma, address, pfn);
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 309 /*
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 310 * Somebody beat us to this PTE or prefaulting to
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 311 * an already populated PTE, or prefaulting error.
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 312 */
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 313
4daa4fba3a3899 Souptick Joarder 2018-06-02 314 if (unlikely((ret == VM_FAULT_NOPAGE && i > 0)))
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 315 break;
4daa4fba3a3899 Souptick Joarder 2018-06-02 316 else if (unlikely(ret & VM_FAULT_ERROR))
eba67093f53532 Thomas Hellstrom 2010-11-11 317 goto out_io_unlock;
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 318
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 319 address += PAGE_SIZE;
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 320 if (unlikely(++page_offset >= page_last))
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 321 break;
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 322 }
de8dfb8e3449c7 Tom St Denis 2018-01-26 323 ret = VM_FAULT_NOPAGE;
eba67093f53532 Thomas Hellstrom 2010-11-11 324 out_io_unlock:
eba67093f53532 Thomas Hellstrom 2010-11-11 325 ttm_mem_io_unlock(man);
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 326 out_unlock:
7e18f7a415538c Evan Quan 2019-02-18 327 kcl_reservation_object_unlock(bo->resv);
de8dfb8e3449c7 Tom St Denis 2018-01-26 328 return ret;
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 329 }
ba4e7d973dd09b Thomas Hellstrom 2009-06-10 330
:::::: The code at line 128 was first introduced by commit
:::::: ba4e7d973dd09b66912ac4c0856add8b0703a997 drm: Add the TTM GPU memory manager subsystem.
:::::: TO: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
:::::: CC: Dave Airlie <airlied@xxxxxxxxxx>
---
0-DAY kernel test infrastructure Open Source Technology Center
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