sys/dev/enic/vnic_intr.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2008-2017 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  */
   5
   6 #ifndef _VNIC_INTR_H_
   7 #define _VNIC_INTR_H_
   8
   9
  10 #include "vnic_dev.h"
  11
  12 #define VNIC_INTR_TIMER_TYPE_ABS        0
  13 #define VNIC_INTR_TIMER_TYPE_QUIET      1
  14
  15 /* Interrupt control */
  16 struct vnic_intr_ctrl {
  17         u32 coalescing_timer;           /* 0x00 */
  18 #define INTR_COALESCING_TIMER              0x00
  19         u32 pad0;
  20         u32 coalescing_value;           /* 0x08 */
  21 #define INTR_COALESCING_VALUE              0x08
  22         u32 pad1;
  23         u32 coalescing_type;            /* 0x10 */
  24 #define INTR_COALESCING_TYPE               0x10
  25         u32 pad2;
  26         u32 mask_on_assertion;          /* 0x18 */
  27 #define INTR_MASK_ON_ASSERTION             0x18
  28         u32 pad3;
  29         u32 mask;                       /* 0x20 */
  30 #define INTR_MASK                          0x20
  31         u32 pad4;
  32         u32 int_credits;                /* 0x28 */
  33 #define INTR_CREDITS                       0x28
  34         u32 pad5;
  35         u32 int_credit_return;          /* 0x30 */
  36 #define INTR_CREDIT_RETURN                 0x30
  37         u32 pad6;
  38 };
  39
  40 struct vnic_intr {
  41         unsigned int index;
  42         struct vnic_dev *vdev;
  43         struct vnic_res *ctrl;
  44 };
  45
  46 static inline void vnic_intr_mask(struct vnic_intr *intr)
  47 {
  48         ENIC_BUS_WRITE_4(intr->ctrl, INTR_MASK, 1);
  49 }
  50
  51 static inline int vnic_intr_masked(struct vnic_intr *intr)
  52 {
  53         int ret;
  54
  55         ret = ENIC_BUS_READ_4(intr->ctrl, INTR_MASK);
  56         return ret;
  57 }
  58
  59 static inline void vnic_intr_unmask(struct vnic_intr *intr)
  60 {
  61         ENIC_BUS_WRITE_4(intr->ctrl, INTR_MASK, 0);
  62 }
  63
  64 static inline void vnic_intr_return_credits(struct vnic_intr *intr,
  65         unsigned int credits, int unmask, int reset_timer)
  66 {
  67 #define VNIC_INTR_UNMASK_SHIFT          16
  68 #define VNIC_INTR_RESET_TIMER_SHIFT     17
  69
  70         u32 int_credit_return = (credits & 0xffff) |
  71                 (unmask ? (1 << VNIC_INTR_UNMASK_SHIFT) : 0) |
  72                 (reset_timer ? (1 << VNIC_INTR_RESET_TIMER_SHIFT) : 0);
  73
  74         ENIC_BUS_WRITE_4(intr->ctrl, INTR_CREDIT_RETURN, int_credit_return);
  75 }
  76
  77 static inline unsigned int vnic_intr_credits(struct vnic_intr *intr)
  78 {
  79         return ENIC_BUS_READ_4(intr->ctrl, INTR_CREDITS);
  80 }
  81
  82 static inline void vnic_intr_return_all_credits(struct vnic_intr *intr)
  83 {
  84         unsigned int credits = vnic_intr_credits(intr);
  85         int unmask = 1;
  86         int reset_timer = 1;
  87
  88         vnic_intr_return_credits(intr, credits, unmask, reset_timer);
  89 }
  90
  91 void vnic_intr_free(struct vnic_intr *intr);
  92 int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
  93         unsigned int index);
  94 void vnic_intr_init(struct vnic_intr *intr, u32 coalescing_timer,
  95         unsigned int coalescing_type, unsigned int mask_on_assertion);
  96 void vnic_intr_coalescing_timer_set(struct vnic_intr *intr,
  97         u32 coalescing_timer);
  98 void vnic_intr_clean(struct vnic_intr *intr);
  99
 100 #endif /* _VNIC_INTR_H_ */