Tom Tucker | f94b533 | 2006-09-22 15:22:48 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2005 Ammasso, Inc. All rights reserved. |
| 3 | * Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved. |
| 4 | * |
| 5 | * This software is available to you under a choice of one of two |
| 6 | * licenses. You may choose to be licensed under the terms of the GNU |
| 7 | * General Public License (GPL) Version 2, available from the file |
| 8 | * COPYING in the main directory of this source tree, or the |
| 9 | * OpenIB.org BSD license below: |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or |
| 12 | * without modification, are permitted provided that the following |
| 13 | * conditions are met: |
| 14 | * |
| 15 | * - Redistributions of source code must retain the above |
| 16 | * copyright notice, this list of conditions and the following |
| 17 | * disclaimer. |
| 18 | * |
| 19 | * - Redistributions in binary form must reproduce the above |
| 20 | * copyright notice, this list of conditions and the following |
| 21 | * disclaimer in the documentation and/or other materials |
| 22 | * provided with the distribution. |
| 23 | * |
| 24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 31 | * SOFTWARE. |
| 32 | */ |
| 33 | |
| 34 | #ifndef _C2_MQ_H_ |
| 35 | #define _C2_MQ_H_ |
| 36 | #include <linux/kernel.h> |
| 37 | #include <linux/dma-mapping.h> |
| 38 | #include "c2_wr.h" |
| 39 | |
| 40 | enum c2_shared_regs { |
| 41 | |
| 42 | C2_SHARED_ARMED = 0x10, |
| 43 | C2_SHARED_NOTIFY = 0x18, |
| 44 | C2_SHARED_SHARED = 0x40, |
| 45 | }; |
| 46 | |
| 47 | struct c2_mq_shared { |
| 48 | u16 unused1; |
| 49 | u8 armed; |
| 50 | u8 notification_type; |
| 51 | u32 unused2; |
| 52 | u16 shared; |
| 53 | /* Pad to 64 bytes. */ |
| 54 | u8 pad[64 - sizeof(u16) - 2 * sizeof(u8) - sizeof(u32) - sizeof(u16)]; |
| 55 | }; |
| 56 | |
| 57 | enum c2_mq_type { |
| 58 | C2_MQ_HOST_TARGET = 1, |
| 59 | C2_MQ_ADAPTER_TARGET = 2, |
| 60 | }; |
| 61 | |
| 62 | /* |
| 63 | * c2_mq_t is for kernel-mode MQs like the VQs Cand the AEQ. |
| 64 | * c2_user_mq_t (which is the same format) is for user-mode MQs... |
| 65 | */ |
| 66 | #define C2_MQ_MAGIC 0x4d512020 /* 'MQ ' */ |
| 67 | struct c2_mq { |
| 68 | u32 magic; |
| 69 | union { |
| 70 | u8 *host; |
| 71 | u8 __iomem *adapter; |
| 72 | } msg_pool; |
| 73 | dma_addr_t host_dma; |
| 74 | DECLARE_PCI_UNMAP_ADDR(mapping); |
| 75 | u16 hint_count; |
| 76 | u16 priv; |
| 77 | struct c2_mq_shared __iomem *peer; |
Roland Dreier | dc544bc | 2008-04-16 21:01:08 -0700 | [diff] [blame] | 78 | __be16 *shared; |
Tom Tucker | f94b533 | 2006-09-22 15:22:48 -0700 | [diff] [blame] | 79 | dma_addr_t shared_dma; |
| 80 | u32 q_size; |
| 81 | u32 msg_size; |
| 82 | u32 index; |
| 83 | enum c2_mq_type type; |
| 84 | }; |
| 85 | |
| 86 | static __inline__ int c2_mq_empty(struct c2_mq *q) |
| 87 | { |
| 88 | return q->priv == be16_to_cpu(*q->shared); |
| 89 | } |
| 90 | |
| 91 | static __inline__ int c2_mq_full(struct c2_mq *q) |
| 92 | { |
| 93 | return q->priv == (be16_to_cpu(*q->shared) + q->q_size - 1) % q->q_size; |
| 94 | } |
| 95 | |
| 96 | extern void c2_mq_lconsume(struct c2_mq *q, u32 wqe_count); |
| 97 | extern void *c2_mq_alloc(struct c2_mq *q); |
| 98 | extern void c2_mq_produce(struct c2_mq *q); |
| 99 | extern void *c2_mq_consume(struct c2_mq *q); |
| 100 | extern void c2_mq_free(struct c2_mq *q); |
| 101 | extern void c2_mq_req_init(struct c2_mq *q, u32 index, u32 q_size, u32 msg_size, |
| 102 | u8 __iomem *pool_start, u16 __iomem *peer, u32 type); |
| 103 | extern void c2_mq_rep_init(struct c2_mq *q, u32 index, u32 q_size, u32 msg_size, |
| 104 | u8 *pool_start, u16 __iomem *peer, u32 type); |
| 105 | |
| 106 | #endif /* _C2_MQ_H_ */ |