write in 30M

hc

2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/drivers/xen/gntdev-common.h
..
..
@@ -15,21 +15,16 @@
15
15
 #include <linux/mman.h>
16
16
 #include <linux/mmu_notifier.h>
17
17
 #include <linux/types.h>
18
+#include <xen/interface/event_channel.h>
19
+#include <xen/grant_table.h>
18
20
 
19
21
 struct gntdev_dmabuf_priv;
20
22
 
21
23
 struct gntdev_priv {
22
24
 	/* Maps with visible offsets in the file descriptor. */
23
25
 	struct list_head maps;
24
-	/*
25
-	 * Maps that are not visible; will be freed on munmap.
26
-	 * Only populated if populate_freeable_maps == 1
27
-	 */
28
-	struct list_head freeable_maps;
29
26
 	/* lock protects maps and freeable_maps. */
30
27
 	struct mutex lock;
31
-	struct mm_struct *mm;
32
-	struct mmu_notifier mn;
33
28
 
34
29
 #ifdef CONFIG_XEN_GRANT_DMA_ALLOC
35
30
 	/* Device for which DMA memory is allocated. */
..
..
@@ -45,12 +40,14 @@
45
40
 	int flags;
46
41
 	/* Address relative to the start of the gntdev_grant_map. */
47
42
 	int addr;
48
-	int event;
43
+	evtchn_port_t event;
49
44
 };
50
45
 
51
46
 struct gntdev_grant_map {
47
+	atomic_t in_use;
48
+	struct mmu_interval_notifier notifier;
49
+	bool notifier_init;
52
50
 	struct list_head next;
53
-	struct vm_area_struct *vma;
54
51
 	int index;
55
52
 	int count;
56
53
 	int flags;
..
..
@@ -61,6 +58,7 @@
61
58
 	struct gnttab_unmap_grant_ref *unmap_ops;
62
59
 	struct gnttab_map_grant_ref   *kmap_ops;
63
60
 	struct gnttab_unmap_grant_ref *kunmap_ops;
61
+	bool *being_removed;
64
62
 	struct page **pages;
65
63
 	unsigned long pages_vm_start;
66
64
 
..
..
@@ -78,6 +76,11 @@
78
76
 	/* Needed to avoid allocation in gnttab_dma_free_pages(). */
79
77
 	xen_pfn_t *frames;
80
78
 #endif
79
+
80
+	/* Number of live grants */
81
+	atomic_t live_grants;
82
+	/* Needed to avoid allocation in __unmap_grant_pages */
83
+	struct gntab_unmap_queue_data unmap_data;
81
84
 };
82
85
 
83
86
 struct gntdev_grant_map *gntdev_alloc_map(struct gntdev_priv *priv, int count,
..
..
@@ -87,7 +90,7 @@
87
90
 
88
91
 void gntdev_put_map(struct gntdev_priv *priv, struct gntdev_grant_map *map);
89
92
 
90
-bool gntdev_account_mapped_pages(int count);
93
+bool gntdev_test_page_count(unsigned int count);
91
94
 
92
95
 int gntdev_map_grant_pages(struct gntdev_grant_map *map);
93
96