projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| c8806b6c NM |
1 | /* |
| 2 | * Copyright 2014 Cisco Systems, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * This program is free software; you may redistribute it and/or modify | |
| 5 | * it under the terms of the GNU General Public License as published by | |
| 6 | * the Free Software Foundation; version 2 of the License. | |
| 7 | * | |
| 8 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
| 9 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
| 10 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
| 11 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
| 12 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
| 13 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
| 14 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
| 15 | * SOFTWARE. | |
| 16 | */ | |
| 17 | ||
| 18 | #ifndef _VNIC_INTR_H_ | |
| 19 | #define _VNIC_INTR_H_ | |
| 20 | ||
| 21 | #include <linux/pci.h> | |
| 22 | #include "vnic_dev.h" | |
| 23 | ||
| 24 | #define VNIC_INTR_TIMER_MAX 0xffff | |
| 25 | ||
| 26 | #define VNIC_INTR_TIMER_TYPE_ABS 0 | |
| 27 | #define VNIC_INTR_TIMER_TYPE_QUIET 1 | |
| 28 | ||
| 29 | /* Interrupt control */ | |
| 30 | struct vnic_intr_ctrl { | |
| 31 | u32 coalescing_timer; /* 0x00 */ | |
| 32 | u32 pad0; | |
| 33 | u32 coalescing_value; /* 0x08 */ | |
| 34 | u32 pad1; | |
| 35 | u32 coalescing_type; /* 0x10 */ | |
| 36 | u32 pad2; | |
| 37 | u32 mask_on_assertion; /* 0x18 */ | |
| 38 | u32 pad3; | |
| 39 | u32 mask; /* 0x20 */ | |
| 40 | u32 pad4; | |
| 41 | u32 int_credits; /* 0x28 */ | |
| 42 | u32 pad5; | |
| 43 | u32 int_credit_return; /* 0x30 */ | |
| 44 | u32 pad6; | |
| 45 | }; | |
| 46 | ||
| 47 | struct vnic_intr { | |
| 48 | unsigned int index; | |
| 49 | struct vnic_dev *vdev; | |
| 50 | struct vnic_intr_ctrl __iomem *ctrl; /* memory-mapped */ | |
| 51 | }; | |
| 52 | ||
| 53 | static inline void | |
| 54 | svnic_intr_unmask(struct vnic_intr *intr) | |
| 55 | { | |
| 56 | iowrite32(0, &intr->ctrl->mask); | |
| 57 | } | |
| 58 | ||
| 59 | static inline void | |
| 60 | svnic_intr_mask(struct vnic_intr *intr) | |
| 61 | { | |
| 62 | iowrite32(1, &intr->ctrl->mask); | |
| 63 | } | |
| 64 | ||
| 65 | static inline void | |
| 66 | svnic_intr_return_credits(struct vnic_intr *intr, | |
| 67 | unsigned int credits, | |
| 68 | int unmask, | |
| 69 | int reset_timer) | |
| 70 | { | |
| 71 | #define VNIC_INTR_UNMASK_SHIFT 16 | |
| 72 | #define VNIC_INTR_RESET_TIMER_SHIFT 17 | |
| 73 | ||
| 74 | u32 int_credit_return = (credits & 0xffff) | | |
| 75 | (unmask ? (1 << VNIC_INTR_UNMASK_SHIFT) : 0) | | |
| 76 | (reset_timer ? (1 << VNIC_INTR_RESET_TIMER_SHIFT) : 0); | |
| 77 | ||
| 78 | iowrite32(int_credit_return, &intr->ctrl->int_credit_return); | |
| 79 | } | |
| 80 | ||
| 81 | static inline unsigned int | |
| 82 | svnic_intr_credits(struct vnic_intr *intr) | |
| 83 | { | |
| 84 | return ioread32(&intr->ctrl->int_credits); | |
| 85 | } | |
| 86 | ||
| 87 | static inline void | |
| 88 | svnic_intr_return_all_credits(struct vnic_intr *intr) | |
| 89 | { | |
| 90 | unsigned int credits = svnic_intr_credits(intr); | |
| 91 | int unmask = 1; | |
| 92 | int reset_timer = 1; | |
| 93 | ||
| 94 | svnic_intr_return_credits(intr, credits, unmask, reset_timer); | |
| 95 | } | |
| 96 | ||
| 97 | void svnic_intr_free(struct vnic_intr *); | |
| 98 | int svnic_intr_alloc(struct vnic_dev *, struct vnic_intr *, unsigned int); | |
| 99 | void svnic_intr_init(struct vnic_intr *intr, | |
| 100 | unsigned int coalescing_timer, | |
| 101 | unsigned int coalescing_type, | |
| 102 | unsigned int mask_on_assertion); | |
| 103 | void svnic_intr_clean(struct vnic_intr *); | |
| 104 | ||
| 105 | #endif /* _VNIC_INTR_H_ */ |