/* * Copyright 2008 Cisco Systems, Inc. All rights reserved. * Copyright 2007 Nuova Systems, Inc. All rights reserved. * * This program is free software; you may redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * */ #ifndef _VNIC_INTR_H_ #define _VNIC_INTR_H_ #include <linux/pci.h> #include "vnic_dev.h" #define VNIC_INTR_TIMER_MAX 0xffff #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 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, unsigned int coalescing_timer, unsigned int coalescing_type, unsigned int mask_on_assertion); void vnic_intr_clean(struct vnic_intr *intr); #endif /* _VNIC_INTR_H_ */