drm/vmwgfx: Use VMware hypercall API

Switch from VMWARE_HYPERCALL macro to vmware_hypercall API. Eliminate arch
specific code.

drivers/gpu/drm/vmwgfx/vmwgfx_msg_arm64.h: implement arm64 variant
of vmware_hypercall. And keep it here until introduction of ARM64
VMWare hypervisor interface.

Signed-off-by: Alexey Makhalov <alexey.makhalov@broadcom.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20240613191650.9913-5-alexey.makhalov@broadcom.com

Author: YustasSwamp

drivers/gpu/drm/vmwgfx/vmwgfx_msg.c

@@ -48,8 +48,6 @@
 
 #define RETRIES                 3
 
-#define VMW_HYPERVISOR_MAGIC    0x564D5868
-
 #define VMW_PORT_CMD_MSG        30
 #define VMW_PORT_CMD_HB_MSG     0
 #define VMW_PORT_CMD_OPEN_CHANNEL  (MSG_TYPE_OPEN << 16 | VMW_PORT_CMD_MSG)
@@ -104,20 +102,18 @@ static const char* const mksstat_kern_name_desc[MKSSTAT_KERN_COUNT][2] =
  */
 static int vmw_open_channel(struct rpc_channel *channel, unsigned int protocol)
 {
-	unsigned long eax, ebx, ecx, edx, si = 0, di = 0;
+	u32 ecx, edx, esi, edi;
 
-	VMW_PORT(VMW_PORT_CMD_OPEN_CHANNEL,
-		(protocol | GUESTMSG_FLAG_COOKIE), si, di,
-		0,
-		VMW_HYPERVISOR_MAGIC,
-		eax, ebx, ecx, edx, si, di);
+	vmware_hypercall6(VMW_PORT_CMD_OPEN_CHANNEL,
+			  (protocol | GUESTMSG_FLAG_COOKIE), 0,
+			  &ecx, &edx, &esi, &edi);
 
 	if ((HIGH_WORD(ecx) & MESSAGE_STATUS_SUCCESS) == 0)
 		return -EINVAL;
 
 	channel->channel_id  = HIGH_WORD(edx);
-	channel->cookie_high = si;
-	channel->cookie_low  = di;
+	channel->cookie_high = esi;
+	channel->cookie_low  = edi;
 
 	return 0;
 }
@@ -133,17 +129,13 @@ static int vmw_open_channel(struct rpc_channel *channel, unsigned int protocol)
  */
 static int vmw_close_channel(struct rpc_channel *channel)
 {
-	unsigned long eax, ebx, ecx, edx, si, di;
-
-	/* Set up additional parameters */
-	si  = channel->cookie_high;
-	di  = channel->cookie_low;
+	u32 ecx;
 
-	VMW_PORT(VMW_PORT_CMD_CLOSE_CHANNEL,
-		0, si, di,
-		channel->channel_id << 16,
-		VMW_HYPERVISOR_MAGIC,
-		eax, ebx, ecx, edx, si, di);
+	vmware_hypercall5(VMW_PORT_CMD_CLOSE_CHANNEL,
+			  0, channel->channel_id << 16,
+			  channel->cookie_high,
+			  channel->cookie_low,
+			  &ecx);
 
 	if ((HIGH_WORD(ecx) & MESSAGE_STATUS_SUCCESS) == 0)
 		return -EINVAL;
@@ -163,24 +155,18 @@ static int vmw_close_channel(struct rpc_channel *channel)
 static unsigned long vmw_port_hb_out(struct rpc_channel *channel,
 				     const char *msg, bool hb)
 {
-	unsigned long si, di, eax, ebx, ecx, edx;
+	u32 ebx, ecx;
 	unsigned long msg_len = strlen(msg);
 
 	/* HB port can't access encrypted memory. */
 	if (hb && !cc_platform_has(CC_ATTR_MEM_ENCRYPT)) {
-		unsigned long bp = channel->cookie_high;
-		u32 channel_id = (channel->channel_id << 16);
-
-		si = (uintptr_t) msg;
-		di = channel->cookie_low;
-
-		VMW_PORT_HB_OUT(
+		vmware_hypercall_hb_out(
 			(MESSAGE_STATUS_SUCCESS << 16) | VMW_PORT_CMD_HB_MSG,
-			msg_len, si, di,
-			VMWARE_HYPERVISOR_HB | channel_id |
-			VMWARE_HYPERVISOR_OUT,
-			VMW_HYPERVISOR_MAGIC, bp,
-			eax, ebx, ecx, edx, si, di);
+			msg_len,
+			channel->channel_id << 16,
+			(uintptr_t) msg, channel->cookie_low,
+			channel->cookie_high,
+			&ebx);
 
 		return ebx;
 	}
@@ -194,14 +180,13 @@ static unsigned long vmw_port_hb_out(struct rpc_channel *channel,
 		memcpy(&word, msg, bytes);
 		msg_len -= bytes;
 		msg += bytes;
-		si = channel->cookie_high;
-		di = channel->cookie_low;
-
-		VMW_PORT(VMW_PORT_CMD_MSG | (MSG_TYPE_SENDPAYLOAD << 16),
-			 word, si, di,
-			 channel->channel_id << 16,
-			 VMW_HYPERVISOR_MAGIC,
-			 eax, ebx, ecx, edx, si, di);
+
+		vmware_hypercall5(VMW_PORT_CMD_MSG |
+				  (MSG_TYPE_SENDPAYLOAD << 16),
+				  word, channel->channel_id << 16,
+				  channel->cookie_high,
+				  channel->cookie_low,
+				  &ecx);
 	}
 
 	return ecx;
@@ -220,22 +205,17 @@ static unsigned long vmw_port_hb_out(struct rpc_channel *channel,
 static unsigned long vmw_port_hb_in(struct rpc_channel *channel, char *reply,
 				    unsigned long reply_len, bool hb)
 {
-	unsigned long si, di, eax, ebx, ecx, edx;
+	u32 ebx, ecx, edx;
 
 	/* HB port can't access encrypted memory */
 	if (hb && !cc_platform_has(CC_ATTR_MEM_ENCRYPT)) {
-		unsigned long bp = channel->cookie_low;
-		u32 channel_id = (channel->channel_id << 16);
-
-		si = channel->cookie_high;
-		di = (uintptr_t) reply;
-
-		VMW_PORT_HB_IN(
+		vmware_hypercall_hb_in(
 			(MESSAGE_STATUS_SUCCESS << 16) | VMW_PORT_CMD_HB_MSG,
-			reply_len, si, di,
-			VMWARE_HYPERVISOR_HB | channel_id,
-			VMW_HYPERVISOR_MAGIC, bp,
-			eax, ebx, ecx, edx, si, di);
+			reply_len,
+			channel->channel_id << 16,
+			channel->cookie_high,
+			(uintptr_t) reply, channel->cookie_low,
+			&ebx);
 
 		return ebx;
 	}
@@ -245,14 +225,13 @@ static unsigned long vmw_port_hb_in(struct rpc_channel *channel, char *reply,
 	while (reply_len) {
 		unsigned int bytes = min_t(unsigned long, reply_len, 4);
 
-		si = channel->cookie_high;
-		di = channel->cookie_low;
-
-		VMW_PORT(VMW_PORT_CMD_MSG | (MSG_TYPE_RECVPAYLOAD << 16),
-			 MESSAGE_STATUS_SUCCESS, si, di,
-			 channel->channel_id << 16,
-			 VMW_HYPERVISOR_MAGIC,
-			 eax, ebx, ecx, edx, si, di);
+		vmware_hypercall7(VMW_PORT_CMD_MSG |
+				  (MSG_TYPE_RECVPAYLOAD << 16),
+				  MESSAGE_STATUS_SUCCESS,
+				  channel->channel_id << 16,
+				  channel->cookie_high,
+				  channel->cookie_low,
+				  &ebx, &ecx, &edx);
 
 		if ((HIGH_WORD(ecx) & MESSAGE_STATUS_SUCCESS) == 0)
 			break;
@@ -276,22 +255,18 @@ static unsigned long vmw_port_hb_in(struct rpc_channel *channel, char *reply,
  */
 static int vmw_send_msg(struct rpc_channel *channel, const char *msg)
 {
-	unsigned long eax, ebx, ecx, edx, si, di;
+	u32 ebx, ecx;
 	size_t msg_len = strlen(msg);
 	int retries = 0;
 
 	while (retries < RETRIES) {
 		retries++;
 
-		/* Set up additional parameters */
-		si  = channel->cookie_high;
-		di  = channel->cookie_low;
-
-		VMW_PORT(VMW_PORT_CMD_SENDSIZE,
-			msg_len, si, di,
-			channel->channel_id << 16,
-			VMW_HYPERVISOR_MAGIC,
-			eax, ebx, ecx, edx, si, di);
+		vmware_hypercall5(VMW_PORT_CMD_SENDSIZE,
+				  msg_len, channel->channel_id << 16,
+				  channel->cookie_high,
+				  channel->cookie_low,
+				  &ecx);
 
 		if ((HIGH_WORD(ecx) & MESSAGE_STATUS_SUCCESS) == 0) {
 			/* Expected success. Give up. */
@@ -329,7 +304,7 @@ STACK_FRAME_NON_STANDARD(vmw_send_msg);
 static int vmw_recv_msg(struct rpc_channel *channel, void **msg,
 			size_t *msg_len)
 {
-	unsigned long eax, ebx, ecx, edx, si, di;
+	u32 ebx, ecx, edx;
 	char *reply;
 	size_t reply_len;
 	int retries = 0;
@@ -341,15 +316,11 @@ static int vmw_recv_msg(struct rpc_channel *channel, void **msg,
 	while (retries < RETRIES) {
 		retries++;
 
-		/* Set up additional parameters */
-		si  = channel->cookie_high;
-		di  = channel->cookie_low;
-
-		VMW_PORT(VMW_PORT_CMD_RECVSIZE,
-			0, si, di,
-			channel->channel_id << 16,
-			VMW_HYPERVISOR_MAGIC,
-			eax, ebx, ecx, edx, si, di);
+		vmware_hypercall7(VMW_PORT_CMD_RECVSIZE,
+				  0, channel->channel_id << 16,
+				  channel->cookie_high,
+				  channel->cookie_low,
+				  &ebx, &ecx, &edx);
 
 		if ((HIGH_WORD(ecx) & MESSAGE_STATUS_SUCCESS) == 0) {
 			DRM_ERROR("Failed to get reply size for host message.\n");
@@ -384,16 +355,12 @@ static int vmw_recv_msg(struct rpc_channel *channel, void **msg,
 
 		reply[reply_len] = '\0';
 
-
-		/* Ack buffer */
-		si  = channel->cookie_high;
-		di  = channel->cookie_low;
-
-		VMW_PORT(VMW_PORT_CMD_RECVSTATUS,
-			MESSAGE_STATUS_SUCCESS, si, di,
-			channel->channel_id << 16,
-			VMW_HYPERVISOR_MAGIC,
-			eax, ebx, ecx, edx, si, di);
+		vmware_hypercall5(VMW_PORT_CMD_RECVSTATUS,
+				  MESSAGE_STATUS_SUCCESS,
+				  channel->channel_id << 16,
+				  channel->cookie_high,
+				  channel->cookie_low,
+				  &ecx);
 
 		if ((HIGH_WORD(ecx) & MESSAGE_STATUS_SUCCESS) == 0) {
 			kfree(reply);
@@ -652,13 +619,7 @@ static inline void reset_ppn_array(PPN64 *arr, size_t size)
  */
 static inline void hypervisor_ppn_reset_all(void)
 {
-	unsigned long eax, ebx, ecx, edx, si = 0, di = 0;
-
-	VMW_PORT(VMW_PORT_CMD_MKSGS_RESET,
-		0, si, di,
-		0,
-		VMW_HYPERVISOR_MAGIC,
-		eax, ebx, ecx, edx, si, di);
+	vmware_hypercall1(VMW_PORT_CMD_MKSGS_RESET, 0);
 }
 
 /**
@@ -669,13 +630,7 @@ static inline void hypervisor_ppn_reset_all(void)
  */
 static inline void hypervisor_ppn_add(PPN64 pfn)
 {
-	unsigned long eax, ebx, ecx, edx, si = 0, di = 0;
-
-	VMW_PORT(VMW_PORT_CMD_MKSGS_ADD_PPN,
-		(unsigned long)pfn, si, di,
-		0,
-		VMW_HYPERVISOR_MAGIC,
-		eax, ebx, ecx, edx, si, di);
+	vmware_hypercall1(VMW_PORT_CMD_MKSGS_ADD_PPN, (unsigned long)pfn);
 }
 
 /**
@@ -686,13 +641,7 @@ static inline void hypervisor_ppn_add(PPN64 pfn)
  */
 static inline void hypervisor_ppn_remove(PPN64 pfn)
 {
-	unsigned long eax, ebx, ecx, edx, si = 0, di = 0;
-
-	VMW_PORT(VMW_PORT_CMD_MKSGS_REMOVE_PPN,
-		(unsigned long)pfn, si, di,
-		0,
-		VMW_HYPERVISOR_MAGIC,
-		eax, ebx, ecx, edx, si, di);
+	vmware_hypercall1(VMW_PORT_CMD_MKSGS_REMOVE_PPN, (unsigned long)pfn);
 }
 
 #if IS_ENABLED(CONFIG_DRM_VMWGFX_MKSSTATS)