disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c
..
..
@@ -24,16 +24,16 @@
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24
  *
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  */
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26
 
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-
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-#include <linux/slab.h>
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-#include <linux/module.h>
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+#include <linux/objtool.h>
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28
 #include <linux/kernel.h>
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-#include <linux/frame.h>
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+#include <linux/module.h>
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+#include <linux/slab.h>
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+#include <linux/mem_encrypt.h>
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+
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 #include <asm/hypervisor.h>
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-#include <drm/drmP.h>
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+
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 #include "vmwgfx_drv.h"
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 #include "vmwgfx_msg.h"
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-
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37
 
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 #define MESSAGE_STATUS_SUCCESS  0x0001
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 #define MESSAGE_STATUS_DORECV   0x0002
..
..
@@ -46,8 +46,6 @@
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 #define RETRIES                 3
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47
 
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 #define VMW_HYPERVISOR_MAGIC    0x564D5868
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-#define VMW_HYPERVISOR_PORT     0x5658
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-#define VMW_HYPERVISOR_HB_PORT  0x5659
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49
 
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 #define VMW_PORT_CMD_MSG        30
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 #define VMW_PORT_CMD_HB_MSG     0
..
..
@@ -58,6 +56,8 @@
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 #define VMW_PORT_CMD_RECVSTATUS (MSG_TYPE_RECVSTATUS << 16 | VMW_PORT_CMD_MSG)
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57
 
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 #define HIGH_WORD(X) ((X & 0xFFFF0000) >> 16)
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+
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+#define MAX_USER_MSG_LENGTH	PAGE_SIZE
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61
 
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 static u32 vmw_msg_enabled = 1;
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63
 
..
..
@@ -93,7 +93,7 @@
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93
 
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 	VMW_PORT(VMW_PORT_CMD_OPEN_CHANNEL,
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 		(protocol | GUESTMSG_FLAG_COOKIE), si, di,
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-		VMW_HYPERVISOR_PORT,
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+		0,
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 		VMW_HYPERVISOR_MAGIC,
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 		eax, ebx, ecx, edx, si, di);
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99
 
..
..
@@ -126,7 +126,7 @@
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126
 
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 	VMW_PORT(VMW_PORT_CMD_CLOSE_CHANNEL,
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 		0, si, di,
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-		(VMW_HYPERVISOR_PORT | (channel->channel_id << 16)),
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+		channel->channel_id << 16,
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 		VMW_HYPERVISOR_MAGIC,
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 		eax, ebx, ecx, edx, si, di);
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..
..
@@ -151,7 +151,8 @@
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 	unsigned long si, di, eax, ebx, ecx, edx;
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 	unsigned long msg_len = strlen(msg);
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153
 
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-	if (hb) {
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+	/* HB port can't access encrypted memory. */
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+	if (hb && !mem_encrypt_active()) {
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 		unsigned long bp = channel->cookie_high;
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157
 
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 		si = (uintptr_t) msg;
..
..
@@ -160,7 +161,8 @@
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 		VMW_PORT_HB_OUT(
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 			(MESSAGE_STATUS_SUCCESS << 16) | VMW_PORT_CMD_HB_MSG,
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 			msg_len, si, di,
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-			VMW_HYPERVISOR_HB_PORT | (channel->channel_id << 16),
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+			VMWARE_HYPERVISOR_HB | (channel->channel_id << 16) |
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+			VMWARE_HYPERVISOR_OUT,
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 			VMW_HYPERVISOR_MAGIC, bp,
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 			eax, ebx, ecx, edx, si, di);
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168
 
..
..
@@ -181,7 +183,7 @@
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183
 
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 		VMW_PORT(VMW_PORT_CMD_MSG | (MSG_TYPE_SENDPAYLOAD << 16),
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 			 word, si, di,
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-			 VMW_HYPERVISOR_PORT | (channel->channel_id << 16),
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+			 channel->channel_id << 16,
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 			 VMW_HYPERVISOR_MAGIC,
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 			 eax, ebx, ecx, edx, si, di);
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189
 	}
..
..
@@ -204,7 +206,8 @@
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 {
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 	unsigned long si, di, eax, ebx, ecx, edx;
206
208
 
207
-	if (hb) {
209
+	/* HB port can't access encrypted memory */
210
+	if (hb && !mem_encrypt_active()) {
208
211
 		unsigned long bp = channel->cookie_low;
209
212
 
210
213
 		si = channel->cookie_high;
..
..
@@ -213,7 +216,7 @@
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 		VMW_PORT_HB_IN(
214
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 			(MESSAGE_STATUS_SUCCESS << 16) | VMW_PORT_CMD_HB_MSG,
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 			reply_len, si, di,
216
-			VMW_HYPERVISOR_HB_PORT | (channel->channel_id << 16),
219
+			VMWARE_HYPERVISOR_HB | (channel->channel_id << 16),
217
220
 			VMW_HYPERVISOR_MAGIC, bp,
218
221
 			eax, ebx, ecx, edx, si, di);
219
222
 
..
..
@@ -230,7 +233,7 @@
230
233
 
231
234
 		VMW_PORT(VMW_PORT_CMD_MSG | (MSG_TYPE_RECVPAYLOAD << 16),
232
235
 			 MESSAGE_STATUS_SUCCESS, si, di,
233
-			 VMW_HYPERVISOR_PORT | (channel->channel_id << 16),
236
+			 channel->channel_id << 16,
234
237
 			 VMW_HYPERVISOR_MAGIC,
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238
 			 eax, ebx, ecx, edx, si, di);
236
239
 
..
..
@@ -269,7 +272,7 @@
269
272
 
270
273
 		VMW_PORT(VMW_PORT_CMD_SENDSIZE,
271
274
 			msg_len, si, di,
272
-			VMW_HYPERVISOR_PORT | (channel->channel_id << 16),
275
+			channel->channel_id << 16,
273
276
 			VMW_HYPERVISOR_MAGIC,
274
277
 			eax, ebx, ecx, edx, si, di);
275
278
 
..
..
@@ -327,7 +330,7 @@
327
330
 
328
331
 		VMW_PORT(VMW_PORT_CMD_RECVSIZE,
329
332
 			0, si, di,
330
-			(VMW_HYPERVISOR_PORT | (channel->channel_id << 16)),
333
+			channel->channel_id << 16,
331
334
 			VMW_HYPERVISOR_MAGIC,
332
335
 			eax, ebx, ecx, edx, si, di);
333
336
 
..
..
@@ -371,7 +374,7 @@
371
374
 
372
375
 		VMW_PORT(VMW_PORT_CMD_RECVSTATUS,
373
376
 			MESSAGE_STATUS_SUCCESS, si, di,
374
-			(VMW_HYPERVISOR_PORT | (channel->channel_id << 16)),
377
+			channel->channel_id << 16,
375
378
 			VMW_HYPERVISOR_MAGIC,
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379
 			eax, ebx, ecx, edx, si, di);
377
380
 
..
..
@@ -516,3 +519,83 @@
516
519
 
517
520
 	return -EINVAL;
518
521
 }
522
+
523
+
524
+/**
525
+ * vmw_msg_ioctl: Sends and receveives a message to/from host from/to user-space
526
+ *
527
+ * Sends a message from user-space to host.
528
+ * Can also receive a result from host and return that to user-space.
529
+ *
530
+ * @dev: Identifies the drm device.
531
+ * @data: Pointer to the ioctl argument.
532
+ * @file_priv: Identifies the caller.
533
+ * Return: Zero on success, negative error code on error.
534
+ */
535
+
536
+int vmw_msg_ioctl(struct drm_device *dev, void *data,
537
+		  struct drm_file *file_priv)
538
+{
539
+	struct drm_vmw_msg_arg *arg =
540
+		(struct drm_vmw_msg_arg *) data;
541
+	struct rpc_channel channel;
542
+	char *msg;
543
+	int length;
544
+
545
+	msg = kmalloc(MAX_USER_MSG_LENGTH, GFP_KERNEL);
546
+	if (!msg) {
547
+		DRM_ERROR("Cannot allocate memory for log message.\n");
548
+		return -ENOMEM;
549
+	}
550
+
551
+	length = strncpy_from_user(msg, (void __user *)((unsigned long)arg->send),
552
+				   MAX_USER_MSG_LENGTH);
553
+	if (length < 0 || length >= MAX_USER_MSG_LENGTH) {
554
+		DRM_ERROR("Userspace message access failure.\n");
555
+		kfree(msg);
556
+		return -EINVAL;
557
+	}
558
+
559
+
560
+	if (vmw_open_channel(&channel, RPCI_PROTOCOL_NUM)) {
561
+		DRM_ERROR("Failed to open channel.\n");
562
+		goto out_open;
563
+	}
564
+
565
+	if (vmw_send_msg(&channel, msg)) {
566
+		DRM_ERROR("Failed to send message to host.\n");
567
+		goto out_msg;
568
+	}
569
+
570
+	if (!arg->send_only) {
571
+		char *reply = NULL;
572
+		size_t reply_len = 0;
573
+
574
+		if (vmw_recv_msg(&channel, (void *) &reply, &reply_len)) {
575
+			DRM_ERROR("Failed to receive message from host.\n");
576
+			goto out_msg;
577
+		}
578
+		if (reply && reply_len > 0) {
579
+			if (copy_to_user((void __user *)((unsigned long)arg->receive),
580
+							 reply, reply_len)) {
581
+				DRM_ERROR("Failed to copy message to userspace.\n");
582
+				kfree(reply);
583
+				goto out_msg;
584
+			}
585
+			arg->receive_len = (__u32)reply_len;
586
+		}
587
+		kfree(reply);
588
+	}
589
+
590
+	vmw_close_channel(&channel);
591
+	kfree(msg);
592
+
593
+	return 0;
594
+
595
+out_msg:
596
+	vmw_close_channel(&channel);
597
+out_open:
598
+	kfree(msg);
599
+
600
+	return -EINVAL;
601
+}