Imported Upstream version 16.04

[deb_dpdk.git] / drivers / net / enic / base / vnic_intr.h

diff --git a/drivers/net/enic/base/vnic_intr.h b/drivers/net/enic/base/vnic_intr.h
new file mode 100644 (file)
index 0000000..da089bc
--- /dev/null
+++ b/drivers/net/enic/base/vnic_intr.h
@@ -0,0 +1,125 @@
+/*
+ * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * Copyright (c) 2014, Cisco Systems, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef _VNIC_INTR_H_
+#define _VNIC_INTR_H_
+
+
+#include "vnic_dev.h"
+
+#define VNIC_INTR_TIMER_TYPE_ABS       0
+#define VNIC_INTR_TIMER_TYPE_QUIET     1
+
+/* Interrupt control */
+struct vnic_intr_ctrl {
+       u32 coalescing_timer;           /* 0x00 */
+       u32 pad0;
+       u32 coalescing_value;           /* 0x08 */
+       u32 pad1;
+       u32 coalescing_type;            /* 0x10 */
+       u32 pad2;
+       u32 mask_on_assertion;          /* 0x18 */
+       u32 pad3;
+       u32 mask;                       /* 0x20 */
+       u32 pad4;
+       u32 int_credits;                /* 0x28 */
+       u32 pad5;
+       u32 int_credit_return;          /* 0x30 */
+       u32 pad6;
+};
+
+struct vnic_intr {
+       unsigned int index;
+       struct vnic_dev *vdev;
+       struct vnic_intr_ctrl __iomem *ctrl;            /* memory-mapped */
+};
+
+static inline void vnic_intr_unmask(struct vnic_intr *intr)
+{
+       iowrite32(0, &intr->ctrl->mask);
+}
+
+static inline void vnic_intr_mask(struct vnic_intr *intr)
+{
+       iowrite32(1, &intr->ctrl->mask);
+}
+
+static inline int vnic_intr_masked(struct vnic_intr *intr)
+{
+       return ioread32(&intr->ctrl->mask);
+}
+
+static inline void vnic_intr_return_credits(struct vnic_intr *intr,
+       unsigned int credits, int unmask, int reset_timer)
+{
+#define VNIC_INTR_UNMASK_SHIFT         16
+#define VNIC_INTR_RESET_TIMER_SHIFT    17
+
+       u32 int_credit_return = (credits & 0xffff) |
+               (unmask ? (1 << VNIC_INTR_UNMASK_SHIFT) : 0) |
+               (reset_timer ? (1 << VNIC_INTR_RESET_TIMER_SHIFT) : 0);
+
+       iowrite32(int_credit_return, &intr->ctrl->int_credit_return);
+}
+
+static inline unsigned int vnic_intr_credits(struct vnic_intr *intr)
+{
+       return ioread32(&intr->ctrl->int_credits);
+}
+
+static inline void vnic_intr_return_all_credits(struct vnic_intr *intr)
+{
+       unsigned int credits = vnic_intr_credits(intr);
+       int unmask = 1;
+       int reset_timer = 1;
+
+       vnic_intr_return_credits(intr, credits, unmask, reset_timer);
+}
+
+static inline u32 vnic_intr_legacy_pba(u32 __iomem *legacy_pba)
+{
+       /* read PBA without clearing */
+       return ioread32(legacy_pba);
+}
+
+void vnic_intr_free(struct vnic_intr *intr);
+int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
+       unsigned int index);
+void vnic_intr_init(struct vnic_intr *intr, u32 coalescing_timer,
+       unsigned int coalescing_type, unsigned int mask_on_assertion);
+void vnic_intr_coalescing_timer_set(struct vnic_intr *intr,
+       u32 coalescing_timer);
+void vnic_intr_clean(struct vnic_intr *intr);
+
+#endif /* _VNIC_INTR_H_ */