[PATCH 2/2] drm/vmwgfx: Report vmwgfx version to vmware.log

[Sinclair Yeh]

When tracking down a customer issue, it is useful to know exactly
which version of the vmwgfx they are using.  Since vmware.log is
often the only available debug log, report vmwgfx version in there.

Signed-off-by: Sinclair Yeh <syeh at vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom at vmware.com>
---
 drivers/gpu/drm/vmwgfx/.gitignore   |  2 ++
 drivers/gpu/drm/vmwgfx/Makefile     |  7 ++++++-
 drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 20 +++++++++++++++++++-
 drivers/gpu/drm/vmwgfx/vmwgfx_drv.h |  6 ++++++
 4 files changed, 33 insertions(+), 2 deletions(-)
 create mode 100644 drivers/gpu/drm/vmwgfx/.gitignore

diff --git a/drivers/gpu/drm/vmwgfx/.gitignore b/drivers/gpu/drm/vmwgfx/.gitignore
new file mode 100644
index 0000000..7193109
--- /dev/null
+++ b/drivers/gpu/drm/vmwgfx/.gitignore
@@ -0,0 +1,2 @@
+vmwgfx_version.h
+
diff --git a/drivers/gpu/drm/vmwgfx/Makefile b/drivers/gpu/drm/vmwgfx/Makefile
index d281575..fd6f47f 100644
--- a/drivers/gpu/drm/vmwgfx/Makefile
+++ b/drivers/gpu/drm/vmwgfx/Makefile
@@ -8,6 +8,11 @@ vmwgfx-y := vmwgfx_execbuf.o vmwgfx_gmr.o vmwgfx_kms.o vmwgfx_drv.o \
 	    vmwgfx_fence.o vmwgfx_dmabuf.o vmwgfx_scrn.o vmwgfx_context.o \
 	    vmwgfx_surface.o vmwgfx_prime.o vmwgfx_mob.o vmwgfx_shader.o \
 	    vmwgfx_cmdbuf_res.o vmwgfx_cmdbuf.o vmwgfx_stdu.o \
-	    vmwgfx_cotable.o vmwgfx_so.o vmwgfx_binding.o
+	    vmwgfx_cotable.o vmwgfx_so.o vmwgfx_binding.o vmwgfx_msg.o
+
+$(obj)/vmwgfx_drv.o: $(src)/vmwgfx_version.h
+
+$(src)/vmwgfx_version.h:
+	@echo "#define VMWGFX_GIT_VERSION \""`git rev-parse --short HEAD`"\"" > $(src)/vmwgfx_version.h
 
 obj-$(CONFIG_DRM_VMWGFX) := vmwgfx.o
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index e7335a48..b37f388 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -1,6 +1,6 @@
 /**************************************************************************
  *
- * Copyright © 2009-2015 VMware, Inc., Palo Alto, CA., USA
+ * Copyright © 2009-2016 VMware, Inc., Palo Alto, CA., USA
  * All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
@@ -35,6 +35,7 @@
 #include <drm/ttm/ttm_object.h>
 #include <drm/ttm/ttm_module.h>
 #include <linux/dma_remapping.h>
+#include "vmwgfx_version.h"
 
 #define VMWGFX_DRIVER_NAME "vmwgfx"
 #define VMWGFX_DRIVER_DESC "Linux drm driver for VMware graphics devices"
@@ -44,6 +45,12 @@
 #define VMW_MIN_INITIAL_WIDTH 800
 #define VMW_MIN_INITIAL_HEIGHT 600
 
+#ifndef VMWGFX_GIT_VERSION
+#define VMWGFX_GIT_VERSION "Unknown"
+#endif
+
+#define VMWGFX_REPO "In Tree"
+
 
 /**
  * Fully encoded drm commands. Might move to vmw_drm.h
@@ -613,6 +620,7 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
 	uint32_t svga_id;
 	enum vmw_res_type i;
 	bool refuse_dma = false;
+	char host_log[100] = {0};
 
 	dev_priv = kzalloc(sizeof(*dev_priv), GFP_KERNEL);
 	if (unlikely(dev_priv == NULL)) {
@@ -873,6 +881,16 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
 
 	DRM_INFO("DX: %s\n", dev_priv->has_dx ? "yes." : "no.");
 
+	snprintf(host_log, sizeof(host_log), "vmwgfx: %s-%s",
+		VMWGFX_REPO, VMWGFX_GIT_VERSION);
+	vmw_host_log(host_log);
+
+	memset(host_log, 0, sizeof(host_log));
+	snprintf(host_log, sizeof(host_log), "vmwgfx: Module Version: %d.%d.%d",
+		VMWGFX_DRIVER_MAJOR, VMWGFX_DRIVER_MINOR,
+		VMWGFX_DRIVER_PATCHLEVEL);
+	vmw_host_log(host_log);
+
 	if (dev_priv->enable_fb) {
 		vmw_fifo_resource_inc(dev_priv);
 		vmw_svga_enable(dev_priv);
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
index 019a6ca..6715d4a 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
@@ -1234,4 +1234,10 @@ static inline void vmw_mmio_write(u32 value, u32 *addr)
 {
 	WRITE_ONCE(*addr, value);
 }
+
+/**
+ * Add vmw_msg module function
+ */
+extern int vmw_host_log(const char *log);
+
 #endif
-- 
1.9.1