drm/xe: Use vmalloc for array of bind allocation in bind IOCTL

Use vmalloc in effort to allow a user pass in a large number of binds in
an IOCTL (mesa use case). Also use array allocations rather open coding
the size calculation.

v2: Use __GFP_ACCOUNT for allocations (Thomas)

Fixes: dd08ebf6c352 ("drm/xe: Introduce a new DRM driver for Intel GPUs")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240226155554.103384-1-matthew.brost@intel.com
(cherry picked from commit 35ed1d2bfff7b1969e7f99f3641a83ea54f037e2)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>

diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
index 1d82616..041b294 100644 (file)
--- a/drivers/gpu/drm/xe/xe_vm.c
+++ b/drivers/gpu/drm/xe/xe_vm.c
@@ -2740,8 +2740,9 @@ static int vm_bind_ioctl_check_args(struct xe_device *xe,
                u64 __user *bind_user =
                        u64_to_user_ptr(args->vector_of_binds);
 
-               *bind_ops = kmalloc(sizeof(struct drm_xe_vm_bind_op) *
-                                   args->num_binds, GFP_KERNEL);
+               *bind_ops = kvmalloc_array(args->num_binds,
+                                          sizeof(struct drm_xe_vm_bind_op),
+                                          GFP_KERNEL | __GFP_ACCOUNT);
                if (!*bind_ops)
                        return -ENOMEM;
 
@@ -2831,7 +2832,7 @@ static int vm_bind_ioctl_check_args(struct xe_device *xe,
 
 free_bind_ops:
        if (args->num_binds > 1)
-               kfree(*bind_ops);
+               kvfree(*bind_ops);
        return err;
 }
 
@@ -2919,13 +2920,15 @@ int xe_vm_bind_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
        }
 
        if (args->num_binds) {
-               bos = kcalloc(args->num_binds, sizeof(*bos), GFP_KERNEL);
+               bos = kvcalloc(args->num_binds, sizeof(*bos),
+                              GFP_KERNEL | __GFP_ACCOUNT);
                if (!bos) {
                        err = -ENOMEM;
                        goto release_vm_lock;
                }
 
-               ops = kcalloc(args->num_binds, sizeof(*ops), GFP_KERNEL);
+               ops = kvcalloc(args->num_binds, sizeof(*ops),
+                              GFP_KERNEL | __GFP_ACCOUNT);
                if (!ops) {
                        err = -ENOMEM;
                        goto release_vm_lock;
@@ -3066,10 +3069,10 @@ int xe_vm_bind_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
        for (i = 0; bos && i < args->num_binds; ++i)
                xe_bo_put(bos[i]);
 
-       kfree(bos);
-       kfree(ops);
+       kvfree(bos);
+       kvfree(ops);
        if (args->num_binds > 1)
-               kfree(bind_ops);
+               kvfree(bind_ops);
 
        return err;
 
@@ -3093,10 +3096,10 @@ put_exec_queue:
        if (q)
                xe_exec_queue_put(q);
 free_objs:
-       kfree(bos);
-       kfree(ops);
+       kvfree(bos);
+       kvfree(ops);
        if (args->num_binds > 1)
-               kfree(bind_ops);
+               kvfree(bind_ops);
        return err;
 }