diff -Nuar libdrm-2.4.109.org/include/drm/drm_sarea.h libdrm-2.4.109.sw/include/drm/drm_sarea.h
--- libdrm-2.4.109.org/include/drm/drm_sarea.h	2022-02-26 01:16:04.810000000 +0000
+++ libdrm-2.4.109.sw/include/drm/drm_sarea.h	2022-02-26 04:13:03.090000000 +0000
@@ -39,7 +39,9 @@
 #endif
 
 /* SAREA area needs to be at least a page */
-#if defined(__alpha__)
+#if defined(__sw_64__)
+#define SAREA_MAX                       0x2000U
+#elif defined(__alpha__)
 #define SAREA_MAX                       0x2000U
 #elif defined(__mips__)
 #define SAREA_MAX                       0x4000U
diff -Nuar libdrm-2.4.109.org/xf86drm.c libdrm-2.4.109.sw/xf86drm.c
--- libdrm-2.4.109.org/xf86drm.c	2022-02-26 01:16:04.840000000 +0000
+++ libdrm-2.4.109.sw/xf86drm.c	2022-02-26 02:33:50.700000000 +0000
@@ -1044,7 +1044,7 @@
             sv.drm_dd_major = -1;        /* Don't care */
             sv.drm_dd_minor = -1;        /* Don't care */
             if (drmSetInterfaceVersion(fd, &sv)) {
-#ifndef __alpha__
+#ifndef __sw_64__
                 pci_domain_ok = 0;
 #endif
                 sv.drm_di_major = 1;
diff -Nuar libdrm-2.4.109.org/xf86drm.h libdrm-2.4.109.sw/xf86drm.h
--- libdrm-2.4.109.org/xf86drm.h	2022-02-26 01:16:04.840000000 +0000
+++ libdrm-2.4.109.sw/xf86drm.h	2022-02-26 04:11:01.090000000 +0000
@@ -382,6 +382,34 @@
 			  "r" (new));                                  \
 	} while (0)
 
+#elif defined(__sw_64__)
+#define DRM_CAS(lock, old, new, ret)            \
+        do{                                     \
+                int tmp, old32;                 \
+                int tmp1;                       \
+                __asm__ __volatile__(           \
+                "       addw    $31, %6, %4\n"  \
+                "       ldi     %1, %3\n"       \
+                "1:     lldw    %0, 0(%1)\n"    \
+                "       cmpeq   %0, %4, %2\n"   \
+                "       wr_f    %2\n"           \
+                "       mov     %5, %0\n"       \
+                "       lstw    %0, 0(%1)\n"    \
+                "       rd_f    %0\n"           \
+                "       beq     %2, 2f\n"       \
+                "       beq     %0, 3f\n"       \
+                "       memb\n"                 \
+                "2:     cmpeq   %2, 0, %2\n"    \
+                ".subsection 2\n"               \
+                "3:     br      1b\n"           \
+                ".previous"                     \
+                : "=&r"(tmp),"=&r"(tmp1), "=&r"(ret),   \
+                  "=m"(__drm_dummy_lock(lock)), \
+                  "=&r"(old32)                  \
+                : "r"(new), "r"(old)            \
+                : "memory");                    \
+        } while (0)
+
 #elif defined(__alpha__)
 
 #define	DRM_CAS(lock, old, new, ret)		\
@@ -511,7 +539,9 @@
 #define DRM_CAS(lock,old,new,ret) do { ret=1; } while (0) /* FAST LOCK FAILS */
 #endif
 
-#if defined(__alpha__)
+#if defined(__sw_64__)
+#define DRM_CAS_RESULT(_result)		long _result
+#elif defined(__alpha__)
 #define DRM_CAS_RESULT(_result)		long _result
 #elif defined(__powerpc__)
 #define DRM_CAS_RESULT(_result)		int _result