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2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376 
 kernel/include/linux/vmw_vmci_defs.h
....@@ -1,22 +1,15 @@
1
+/* SPDX-License-Identifier: GPL-2.0-only */
12 /*
23  * VMware VMCI Driver
34  *
45  * Copyright (C) 2012 VMware, Inc. All rights reserved.
5
- *
6
- * This program is free software; you can redistribute it and/or modify it
7
- * under the terms of the GNU General Public License as published by the
8
- * Free Software Foundation version 2 and no later version.
9
- *
10
- * This program is distributed in the hope that it will be useful, but
11
- * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
12
- * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13
- * for more details.
146  */
157 
168 #ifndef _VMW_VMCI_DEF_H_
179 #define _VMW_VMCI_DEF_H_
1810 
1911 #include <linux/atomic.h>
12
+#include <linux/bits.h>
2013 
2114 /* Register offsets. */
2215 #define VMCI_STATUS_ADDR      0x00
....@@ -33,26 +26,27 @@
3326 #define VMCI_MAX_DEVICES 1
3427 
3528 /* Status register bits. */
36
-#define VMCI_STATUS_INT_ON     0x1
29
+#define VMCI_STATUS_INT_ON     BIT(0)
3730 
3831 /* Control register bits. */
39
-#define VMCI_CONTROL_RESET        0x1
40
-#define VMCI_CONTROL_INT_ENABLE   0x2
41
-#define VMCI_CONTROL_INT_DISABLE  0x4
32
+#define VMCI_CONTROL_RESET        BIT(0)
33
+#define VMCI_CONTROL_INT_ENABLE   BIT(1)
34
+#define VMCI_CONTROL_INT_DISABLE  BIT(2)
4235 
4336 /* Capabilities register bits. */
44
-#define VMCI_CAPS_HYPERCALL     0x1
45
-#define VMCI_CAPS_GUESTCALL     0x2
46
-#define VMCI_CAPS_DATAGRAM      0x4
47
-#define VMCI_CAPS_NOTIFICATIONS 0x8
37
+#define VMCI_CAPS_HYPERCALL     BIT(0)
38
+#define VMCI_CAPS_GUESTCALL     BIT(1)
39
+#define VMCI_CAPS_DATAGRAM      BIT(2)
40
+#define VMCI_CAPS_NOTIFICATIONS BIT(3)
41
+#define VMCI_CAPS_PPN64         BIT(4)
4842 
4943 /* Interrupt Cause register bits. */
50
-#define VMCI_ICR_DATAGRAM      0x1
51
-#define VMCI_ICR_NOTIFICATION  0x2
44
+#define VMCI_ICR_DATAGRAM      BIT(0)
45
+#define VMCI_ICR_NOTIFICATION  BIT(1)
5246 
5347 /* Interrupt Mask register bits. */
54
-#define VMCI_IMR_DATAGRAM      0x1
55
-#define VMCI_IMR_NOTIFICATION  0x2
48
+#define VMCI_IMR_DATAGRAM      BIT(0)
49
+#define VMCI_IMR_NOTIFICATION  BIT(1)
5650 
5751 /* Maximum MSI/MSI-X interrupt vectors in the device. */
5852 #define VMCI_MAX_INTRS 2
....@@ -165,7 +159,7 @@
165159  */
166160 #define VMCI_ANON_SRC_CONTEXT_ID   VMCI_INVALID_ID
167161 #define VMCI_ANON_SRC_RESOURCE_ID  VMCI_INVALID_ID
168
-static const struct vmci_handle VMCI_ANON_SRC_HANDLE = {
162
+static const struct vmci_handle __maybe_unused VMCI_ANON_SRC_HANDLE = {
169163 	.context = VMCI_ANON_SRC_CONTEXT_ID,
170164 	.resource = VMCI_ANON_SRC_RESOURCE_ID
171165 };
....@@ -445,8 +439,8 @@
445439 struct vmci_queue_header {
446440 	/* All fields are 64bit and aligned. */
447441 	struct vmci_handle handle;	/* Identifier. */
448
-	atomic64_t producer_tail;	/* Offset in this queue. */
449
-	atomic64_t consumer_head;	/* Offset in peer queue. */
442
+	u64 producer_tail;	/* Offset in this queue. */
443
+	u64 consumer_head;	/* Offset in peer queue. */
450444 };
451445 
452446 /*
....@@ -471,9 +465,9 @@
471465  * datagram callback is invoked in a delayed context (not interrupt context).
472466  */
473467 #define VMCI_FLAG_DG_NONE          0
474
-#define VMCI_FLAG_WELLKNOWN_DG_HND 0x1
475
-#define VMCI_FLAG_ANYCID_DG_HND    0x2
476
-#define VMCI_FLAG_DG_DELAYED_CB    0x4
468
+#define VMCI_FLAG_WELLKNOWN_DG_HND BIT(0)
469
+#define VMCI_FLAG_ANYCID_DG_HND    BIT(1)
470
+#define VMCI_FLAG_DG_DELAYED_CB    BIT(2)
477471 
478472 /*
479473  * Maximum supported size of a VMCI datagram for routable datagrams.
....@@ -578,8 +572,10 @@
578572  */
579573 struct vmci_notify_bm_set_msg {
580574 	struct vmci_datagram hdr;
581
-	u32 bitmap_ppn;
582
-	u32 _pad;
575
+	union {
576
+		u32 bitmap_ppn32;
577
+		u64 bitmap_ppn64;
578
+	};
583579 };
584580 
585581 /*
....@@ -700,7 +696,7 @@
700696 };
701697 
702698 /* VMCI Doorbell API. */
703
-#define VMCI_FLAG_DELAYED_CB 0x01
699
+#define VMCI_FLAG_DELAYED_CB BIT(0)
704700 
705701 typedef void (*vmci_callback) (void *client_data);
706702 
....@@ -745,13 +741,9 @@
745741  * prefix will be used, so correctness isn't an issue, but using a
746742  * 64bit operation still adds unnecessary overhead.
747743  */
748
-static inline u64 vmci_q_read_pointer(atomic64_t *var)
744
+static inline u64 vmci_q_read_pointer(u64 *var)
749745 {
750
-#if defined(CONFIG_X86_32)
751
-	return atomic_read((atomic_t *)var);
752
-#else
753
-	return atomic64_read(var);
754
-#endif
746
+	return READ_ONCE(*(unsigned long *)var);
755747 }
756748 
757749 /*
....@@ -760,23 +752,17 @@
760752  * never exceeds a 32bit value in this case. On 32bit SMP, using a
761753  * locked cmpxchg8b adds unnecessary overhead.
762754  */
763
-static inline void vmci_q_set_pointer(atomic64_t *var,
764
-				      u64 new_val)
755
+static inline void vmci_q_set_pointer(u64 *var, u64 new_val)
765756 {
766
-#if defined(CONFIG_X86_32)
767
-	return atomic_set((atomic_t *)var, (u32)new_val);
768
-#else
769
-	return atomic64_set(var, new_val);
770
-#endif
757
+	/* XXX buggered on big-endian */
758
+	WRITE_ONCE(*(unsigned long *)var, (unsigned long)new_val);
771759 }
772760 
773761 /*
774762  * Helper to add a given offset to a head or tail pointer. Wraps the
775763  * value of the pointer around the max size of the queue.
776764  */
777
-static inline void vmci_qp_add_pointer(atomic64_t *var,
778
-				       size_t add,
779
-				       u64 size)
765
+static inline void vmci_qp_add_pointer(u64 *var, size_t add, u64 size)
780766 {
781767 	u64 new_val = vmci_q_read_pointer(var);
782768 
....@@ -853,8 +839,8 @@
853839 				      const struct vmci_handle handle)
854840 {
855841 	q_header->handle = handle;
856
-	atomic64_set(&q_header->producer_tail, 0);
857
-	atomic64_set(&q_header->consumer_head, 0);
842
+	q_header->producer_tail = 0;
843
+	q_header->consumer_head = 0;
858844 }
859845 
860846 /*