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-rw-r--r--arch/tile/include/asm/hv_driver.h60
1 files changed, 60 insertions, 0 deletions
diff --git a/arch/tile/include/asm/hv_driver.h b/arch/tile/include/asm/hv_driver.h
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+++ b/arch/tile/include/asm/hv_driver.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for
+ * more details.
+ *
+ * This header defines a wrapper interface for managing hypervisor
+ * device calls that will result in an interrupt at some later time.
+ * In particular, this provides wrappers for hv_preada() and
+ * hv_pwritea().
+ */
+
+#ifndef _ASM_TILE_HV_DRIVER_H
+#define _ASM_TILE_HV_DRIVER_H
+
+#include <hv/hypervisor.h>
+
+struct hv_driver_cb;
+
+/* A callback to be invoked when an operation completes. */
+typedef void hv_driver_callback_t(struct hv_driver_cb *cb, __hv32 result);
+
+/*
+ * A structure to hold information about an outstanding call.
+ * The driver must allocate a separate structure for each call.
+ */
+struct hv_driver_cb {
+ hv_driver_callback_t *callback; /* Function to call on interrupt. */
+ void *dev; /* Driver-specific state variable. */
+};
+
+/* Wrapper for invoking hv_dev_preada(). */
+static inline int
+tile_hv_dev_preada(int devhdl, __hv32 flags, __hv32 sgl_len,
+ HV_SGL sgl[/* sgl_len */], __hv64 offset,
+ struct hv_driver_cb *callback)
+{
+ return hv_dev_preada(devhdl, flags, sgl_len, sgl,
+ offset, (HV_IntArg)callback);
+}
+
+/* Wrapper for invoking hv_dev_pwritea(). */
+static inline int
+tile_hv_dev_pwritea(int devhdl, __hv32 flags, __hv32 sgl_len,
+ HV_SGL sgl[/* sgl_len */], __hv64 offset,
+ struct hv_driver_cb *callback)
+{
+ return hv_dev_pwritea(devhdl, flags, sgl_len, sgl,
+ offset, (HV_IntArg)callback);
+}
+
+
+#endif /* _ASM_TILE_HV_DRIVER_H */