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

1 files changed, 135 insertions, 61 deletions

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_msg_arm64.h b/drivers/gpu/drm/vmwgfx/vmwgfx_msg_arm64.h
index 4f40167ad61f..3c78e9338b54 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_msg_arm64.h
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_msg_arm64.h
@@ -34,6 +34,8 @@
 #define VMWARE_HYPERVISOR_HB  BIT(0)
 #define VMWARE_HYPERVISOR_OUT BIT(1)
 
+#define VMWARE_HYPERVISOR_MAGIC	0x564D5868
+
 #define X86_IO_MAGIC 0x86
 
 #define X86_IO_W7_SIZE_SHIFT 0
@@ -45,86 +47,158 @@
 #define X86_IO_W7_IMM_SHIFT  5
 #define X86_IO_W7_IMM_MASK  (0xff << X86_IO_W7_IMM_SHIFT)
 
-static inline void vmw_port(unsigned long cmd, unsigned long in_ebx,
-			    unsigned long in_si, unsigned long in_di,
-			    unsigned long flags, unsigned long magic,
-			    unsigned long *eax, unsigned long *ebx,
-			    unsigned long *ecx, unsigned long *edx,
-			    unsigned long *si, unsigned long *di)
+static inline
+unsigned long vmware_hypercall1(unsigned long cmd, unsigned long in1)
 {
-	register u64 x0 asm("x0") = magic;
-	register u64 x1 asm("x1") = in_ebx;
+	register u64 x0 asm("x0") = VMWARE_HYPERVISOR_MAGIC;
+	register u64 x1 asm("x1") = in1;
 	register u64 x2 asm("x2") = cmd;
-	register u64 x3 asm("x3") = flags | VMWARE_HYPERVISOR_PORT;
-	register u64 x4 asm("x4") = in_si;
-	register u64 x5 asm("x5") = in_di;
+	register u64 x3 asm("x3") = VMWARE_HYPERVISOR_PORT;
+	register u64 x7 asm("x7") = ((u64)X86_IO_MAGIC << 32) |
+				    X86_IO_W7_WITH |
+				    X86_IO_W7_DIR |
+				    (2 << X86_IO_W7_SIZE_SHIFT);
 
+	asm_inline volatile (
+		"mrs xzr, mdccsr_el0; "
+		: "+r" (x0)
+		: "r" (x1), "r" (x2), "r" (x3), "r" (x7)
+		: "memory");
+
+	return x0;
+}
+
+static inline
+unsigned long vmware_hypercall5(unsigned long cmd, unsigned long in1,
+				unsigned long in3, unsigned long in4,
+				unsigned long in5, u32 *out2)
+{
+	register u64 x0 asm("x0") = VMWARE_HYPERVISOR_MAGIC;
+	register u64 x1 asm("x1") = in1;
+	register u64 x2 asm("x2") = cmd;
+	register u64 x3 asm("x3") = in3 | VMWARE_HYPERVISOR_PORT;
+	register u64 x4 asm("x4") = in4;
+	register u64 x5 asm("x5") = in5;
 	register u64 x7 asm("x7") = ((u64)X86_IO_MAGIC << 32) |
 				    X86_IO_W7_WITH |
 				    X86_IO_W7_DIR |
 				    (2 << X86_IO_W7_SIZE_SHIFT);
 
-	asm volatile("mrs xzr, mdccsr_el0 \n\t"
-		     : "+r"(x0), "+r"(x1), "+r"(x2),
-		       "+r"(x3), "+r"(x4), "+r"(x5)
-		     : "r"(x7)
-		     :);
-	*eax = x0;
-	*ebx = x1;
-	*ecx = x2;
-	*edx = x3;
-	*si = x4;
-	*di = x5;
+	asm_inline volatile (
+		"mrs xzr, mdccsr_el0; "
+		: "+r" (x0), "+r" (x2)
+		: "r" (x1), "r" (x3), "r" (x4), "r" (x5), "r" (x7)
+		: "memory");
+
+	*out2 = x2;
+	return x0;
 }
 
-static inline void vmw_port_hb(unsigned long cmd, unsigned long in_ecx,
-			       unsigned long in_si, unsigned long in_di,
-			       unsigned long flags, unsigned long magic,
-			       unsigned long bp, u32 w7dir,
-			       unsigned long *eax, unsigned long *ebx,
-			       unsigned long *ecx, unsigned long *edx,
-			       unsigned long *si, unsigned long *di)
+static inline
+unsigned long vmware_hypercall6(unsigned long cmd, unsigned long in1,
+				unsigned long in3, u32 *out2,
+				u32 *out3, u32 *out4, u32 *out5)
 {
-	register u64 x0 asm("x0") = magic;
+	register u64 x0 asm("x0") = VMWARE_HYPERVISOR_MAGIC;
+	register u64 x1 asm("x1") = in1;
+	register u64 x2 asm("x2") = cmd;
+	register u64 x3 asm("x3") = in3 | VMWARE_HYPERVISOR_PORT;
+	register u64 x4 asm("x4");
+	register u64 x5 asm("x5");
+	register u64 x7 asm("x7") = ((u64)X86_IO_MAGIC << 32) |
+				    X86_IO_W7_WITH |
+				    X86_IO_W7_DIR |
+				    (2 << X86_IO_W7_SIZE_SHIFT);
+
+	asm_inline volatile (
+		"mrs xzr, mdccsr_el0; "
+		: "+r" (x0), "+r" (x2), "+r" (x3), "=r" (x4), "=r" (x5)
+		: "r" (x1), "r" (x7)
+		: "memory");
+
+	*out2 = x2;
+	*out3 = x3;
+	*out4 = x4;
+	*out5 = x5;
+	return x0;
+}
+
+static inline
+unsigned long vmware_hypercall7(unsigned long cmd, unsigned long in1,
+				unsigned long in3, unsigned long in4,
+				unsigned long in5, u32 *out1,
+				u32 *out2, u32 *out3)
+{
+	register u64 x0 asm("x0") = VMWARE_HYPERVISOR_MAGIC;
+	register u64 x1 asm("x1") = in1;
+	register u64 x2 asm("x2") = cmd;
+	register u64 x3 asm("x3") = in3 | VMWARE_HYPERVISOR_PORT;
+	register u64 x4 asm("x4") = in4;
+	register u64 x5 asm("x5") = in5;
+	register u64 x7 asm("x7") = ((u64)X86_IO_MAGIC << 32) |
+				    X86_IO_W7_WITH |
+				    X86_IO_W7_DIR |
+				    (2 << X86_IO_W7_SIZE_SHIFT);
+
+	asm_inline volatile (
+		"mrs xzr, mdccsr_el0; "
+		: "+r" (x0), "+r" (x1), "+r" (x2), "+r" (x3)
+		: "r" (x4), "r" (x5), "r" (x7)
+		: "memory");
+
+	*out1 = x1;
+	*out2 = x2;
+	*out3 = x3;
+	return x0;
+}
+
+static inline
+unsigned long vmware_hypercall_hb(unsigned long cmd, unsigned long in2,
+				  unsigned long in3, unsigned long in4,
+				  unsigned long in5, unsigned long in6,
+				  u32 *out1, int dir)
+{
+	register u64 x0 asm("x0") = VMWARE_HYPERVISOR_MAGIC;
 	register u64 x1 asm("x1") = cmd;
-	register u64 x2 asm("x2") = in_ecx;
-	register u64 x3 asm("x3") = flags | VMWARE_HYPERVISOR_PORT_HB;
-	register u64 x4 asm("x4") = in_si;
-	register u64 x5 asm("x5") = in_di;
-	register u64 x6 asm("x6") = bp;
+	register u64 x2 asm("x2") = in2;
+	register u64 x3 asm("x3") = in3 | VMWARE_HYPERVISOR_PORT_HB;
+	register u64 x4 asm("x4") = in4;
+	register u64 x5 asm("x5") = in5;
+	register u64 x6 asm("x6") = in6;
 	register u64 x7 asm("x7") = ((u64)X86_IO_MAGIC << 32) |
 				    X86_IO_W7_STR |
 				    X86_IO_W7_WITH |
-				    w7dir;
-
-	asm volatile("mrs xzr, mdccsr_el0 \n\t"
-		     : "+r"(x0), "+r"(x1), "+r"(x2),
-		       "+r"(x3), "+r"(x4), "+r"(x5)
-		     : "r"(x6), "r"(x7)
-		     :);
-	*eax = x0;
-	*ebx = x1;
-	*ecx = x2;
-	*edx = x3;
-	*si  = x4;
-	*di  = x5;
-}
+				    dir;
 
-#define VMW_PORT(cmd, in_ebx, in_si, in_di, flags, magic, eax, ebx, ecx, edx,  \
-		 si, di)                                                       \
-	vmw_port(cmd, in_ebx, in_si, in_di, flags, magic, &eax, &ebx, &ecx,    \
-		 &edx, &si, &di)
+	asm_inline volatile (
+		"mrs xzr, mdccsr_el0; "
+		: "+r" (x0), "+r" (x1)
+		: "r" (x2), "r" (x3), "r" (x4), "r" (x5),
+		  "r" (x6), "r" (x7)
+		: "memory");
 
-#define VMW_PORT_HB_OUT(cmd, in_ecx, in_si, in_di, flags, magic, bp, eax, ebx, \
-		        ecx, edx, si, di)                                      \
-	vmw_port_hb(cmd, in_ecx, in_si, in_di, flags, magic, bp,               \
-                    0, &eax, &ebx, &ecx, &edx, &si, &di)
+	*out1 = x1;
+	return x0;
+}
 
-#define VMW_PORT_HB_IN(cmd, in_ecx, in_si, in_di, flags, magic, bp, eax, ebx,  \
-		       ecx, edx, si, di)                                       \
-	vmw_port_hb(cmd, in_ecx, in_si, in_di, flags, magic, bp,               \
-		    X86_IO_W7_DIR, &eax, &ebx, &ecx, &edx, &si, &di)
+static inline
+unsigned long vmware_hypercall_hb_out(unsigned long cmd, unsigned long in2,
+				      unsigned long in3, unsigned long in4,
+				      unsigned long in5, unsigned long in6,
+				      u32 *out1)
+{
+	return vmware_hypercall_hb(cmd, in2, in3, in4, in5, in6, out1, 0);
+}
 
+static inline
+unsigned long vmware_hypercall_hb_in(unsigned long cmd, unsigned long in2,
+				     unsigned long in3, unsigned long in4,
+				     unsigned long in5, unsigned long in6,
+				     u32 *out1)
+{
+	return vmware_hypercall_hb(cmd, in2, in3, in4, in5, in6,  out1,
+				   X86_IO_W7_DIR);
+}
 #endif
 
 #endif /* _VMWGFX_MSG_ARM64_H */