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 uint32_t coalescing_timer; /* 0x00 */ 18 uint32_t pad0; 19 uint32_t coalescing_value; /* 0x08 */ 20 uint32_t pad1; 21 uint32_t coalescing_type; /* 0x10 */ 22 uint32_t pad2; 23 uint32_t mask_on_assertion; /* 0x18 */ 24 uint32_t pad3; 25 uint32_t mask; /* 0x20 */ 26 uint32_t pad4; 27 uint32_t int_credits; /* 0x28 */ 28 uint32_t pad5; 29 uint32_t int_credit_return; /* 0x30 */ 30 uint32_t pad6; 31 }; 32 33 struct vnic_intr { 34 unsigned int index; 35 struct vnic_dev *vdev; 36 struct vnic_intr_ctrl __iomem *ctrl; /* memory-mapped */ 37 }; 38 39 static inline void vnic_intr_unmask(struct vnic_intr *intr) 40 { 41 iowrite32(0, &intr->ctrl->mask); 42 } 43 44 static inline void vnic_intr_mask(struct vnic_intr *intr) 45 { 46 iowrite32(1, &intr->ctrl->mask); 47 } 48 49 static inline int vnic_intr_masked(struct vnic_intr *intr) 50 { 51 return ioread32(&intr->ctrl->mask); 52 } 53 54 static inline void vnic_intr_return_credits(struct vnic_intr *intr, 55 unsigned int credits, int unmask, int reset_timer) 56 { 57 #define VNIC_INTR_UNMASK_SHIFT 16 58 #define VNIC_INTR_RESET_TIMER_SHIFT 17 59 60 uint32_t int_credit_return = (credits & 0xffff) | 61 (unmask ? (1 << VNIC_INTR_UNMASK_SHIFT) : 0) | 62 (reset_timer ? (1 << VNIC_INTR_RESET_TIMER_SHIFT) : 0); 63 64 iowrite32(int_credit_return, &intr->ctrl->int_credit_return); 65 } 66 67 static inline unsigned int vnic_intr_credits(struct vnic_intr *intr) 68 { 69 return ioread32(&intr->ctrl->int_credits); 70 } 71 72 static inline void vnic_intr_return_all_credits(struct vnic_intr *intr) 73 { 74 unsigned int credits = vnic_intr_credits(intr); 75 int unmask = 1; 76 int reset_timer = 1; 77 78 vnic_intr_return_credits(intr, credits, unmask, reset_timer); 79 } 80 81 static inline uint32_t vnic_intr_legacy_pba(uint32_t __iomem *legacy_pba) 82 { 83 /* read PBA without clearing */ 84 return ioread32(legacy_pba); 85 } 86 87 void vnic_intr_free(struct vnic_intr *intr); 88 int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr, 89 unsigned int index); 90 void vnic_intr_init(struct vnic_intr *intr, uint32_t coalescing_timer, 91 unsigned int coalescing_type, unsigned int mask_on_assertion); 92 void vnic_intr_coalescing_timer_set(struct vnic_intr *intr, 93 uint32_t coalescing_timer); 94 void vnic_intr_clean(struct vnic_intr *intr); 95 96 #endif /* _VNIC_INTR_H_ */ 97