linux-user: syscall: ioctls: support DRM_IOCTL_I915_GETPARAM

Another DRM_IOCTL_I915 patches will be sent next.

Signed-off-by: Chen Gang <chengang@emindsoft.com.cn>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20200802133938.12055-1-chengang@emindsoft.com.cn>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

4 files changed, 50 insertions, 0 deletions

diff --git a/linux-user/ioctls.h b/linux-user/ioctls.h
index 0713ae1311..e2fc09b5a5 100644
--- a/linux-user/ioctls.h
+++ b/linux-user/ioctls.h
@@ -581,6 +581,9 @@
 #ifdef HAVE_DRM_H
   IOCTL_SPECIAL(DRM_IOCTL_VERSION, IOC_RW, do_ioctl_drm,
                 MK_PTR(MK_STRUCT(STRUCT_drm_version)))
+
+  IOCTL_SPECIAL(DRM_IOCTL_I915_GETPARAM, IOC_RW, do_ioctl_drm_i915,
+                MK_PTR(MK_STRUCT(STRUCT_drm_i915_getparam)))
 #endif
 
 #ifdef TARGET_TIOCSTART
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index e387246d71..efaa0a7b83 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -114,6 +114,7 @@
 #include <sound/asound.h>
 #ifdef HAVE_DRM_H
 #include <libdrm/drm.h>
+#include <libdrm/i915_drm.h>
 #endif
 #include "linux_loop.h"
 #include "uname.h"
@@ -5426,6 +5427,40 @@ static abi_long do_ioctl_drm(const IOCTLEntry *ie, uint8_t *buf_temp,
     return -TARGET_ENOSYS;
 }
 
+static abi_long do_ioctl_drm_i915_getparam(const IOCTLEntry *ie,
+                                           struct drm_i915_getparam *gparam,
+                                           int fd, abi_long arg)
+{
+    abi_long ret;
+    int value;
+    struct target_drm_i915_getparam *target_gparam;
+
+    if (!lock_user_struct(VERIFY_READ, target_gparam, arg, 0)) {
+        return -TARGET_EFAULT;
+    }
+
+    __get_user(gparam->param, &target_gparam->param);
+    gparam->value = &value;
+    ret = get_errno(safe_ioctl(fd, ie->host_cmd, gparam));
+    put_user_s32(value, target_gparam->value);
+
+    unlock_user_struct(target_gparam, arg, 0);
+    return ret;
+}
+
+static abi_long do_ioctl_drm_i915(const IOCTLEntry *ie, uint8_t *buf_temp,
+                                  int fd, int cmd, abi_long arg)
+{
+    switch (ie->host_cmd) {
+    case DRM_IOCTL_I915_GETPARAM:
+        return do_ioctl_drm_i915_getparam(ie,
+                                          (struct drm_i915_getparam *)buf_temp,
+                                          fd, arg);
+    default:
+        return -TARGET_ENOSYS;
+    }
+}
+
 #endif
 
 IOCTLEntry ioctl_entries[] = {
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index 9aa3bd724f..a6abc7e70b 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -1177,6 +1177,9 @@ struct target_rtc_pll_info {
 /* drm ioctls */
 #define TARGET_DRM_IOCTL_VERSION      TARGET_IOWRU('d', 0x00)
 
+/* drm i915 ioctls */
+#define TARGET_DRM_IOCTL_I915_GETPARAM              TARGET_IOWRU('d', 0x46)
+
 /* from asm/termbits.h */
 
 #define TARGET_NCC 8
@@ -2620,6 +2623,11 @@ struct target_drm_version {
     abi_ulong desc;
 };
 
+struct target_drm_i915_getparam {
+    int param;
+    abi_ulong value;
+};
+
 #include "socket.h"
 
 #include "errno_defs.h"
diff --git a/linux-user/syscall_types.h b/linux-user/syscall_types.h
index 3f1f033464..12bf3484e2 100644
--- a/linux-user/syscall_types.h
+++ b/linux-user/syscall_types.h
@@ -325,6 +325,10 @@ STRUCT(drm_version,
        TYPE_ULONG, /* desc_len */
        TYPE_PTRVOID) /* desc */
 
+STRUCT(drm_i915_getparam,
+       TYPE_INT, /* param */
+       TYPE_PTRVOID) /* value */
+
 STRUCT(file_clone_range,
        TYPE_LONGLONG, /* src_fd */
        TYPE_ULONGLONG, /* src_offset */