diff options
Diffstat (limited to 'drivers/net/enic/cq_desc.h')
| -rw-r--r-- | drivers/net/enic/cq_desc.h | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/drivers/net/enic/cq_desc.h b/drivers/net/enic/cq_desc.h deleted file mode 100644 index d6dd1b4edf6e..000000000000 --- a/drivers/net/enic/cq_desc.h +++ /dev/null @@ -1,80 +0,0 @@ -/* - * Copyright 2008-2010 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 _CQ_DESC_H_ -#define _CQ_DESC_H_ - -/* - * Completion queue descriptor types - */ -enum cq_desc_types { - CQ_DESC_TYPE_WQ_ENET = 0, - CQ_DESC_TYPE_DESC_COPY = 1, - CQ_DESC_TYPE_WQ_EXCH = 2, - CQ_DESC_TYPE_RQ_ENET = 3, - CQ_DESC_TYPE_RQ_FCP = 4, -}; - -/* Completion queue descriptor: 16B - * - * All completion queues have this basic layout. The - * type_specfic area is unique for each completion - * queue type. - */ -struct cq_desc { - __le16 completed_index; - __le16 q_number; - u8 type_specfic[11]; - u8 type_color; -}; - -#define CQ_DESC_TYPE_BITS 4 -#define CQ_DESC_TYPE_MASK ((1 << CQ_DESC_TYPE_BITS) - 1) -#define CQ_DESC_COLOR_MASK 1 -#define CQ_DESC_COLOR_SHIFT 7 -#define CQ_DESC_Q_NUM_BITS 10 -#define CQ_DESC_Q_NUM_MASK ((1 << CQ_DESC_Q_NUM_BITS) - 1) -#define CQ_DESC_COMP_NDX_BITS 12 -#define CQ_DESC_COMP_NDX_MASK ((1 << CQ_DESC_COMP_NDX_BITS) - 1) - -static inline void cq_desc_dec(const struct cq_desc *desc_arg, - u8 *type, u8 *color, u16 *q_number, u16 *completed_index) -{ - const struct cq_desc *desc = desc_arg; - const u8 type_color = desc->type_color; - - *color = (type_color >> CQ_DESC_COLOR_SHIFT) & CQ_DESC_COLOR_MASK; - - /* - * Make sure color bit is read from desc *before* other fields - * are read from desc. Hardware guarantees color bit is last - * bit (byte) written. Adding the rmb() prevents the compiler - * and/or CPU from reordering the reads which would potentially - * result in reading stale values. - */ - - rmb(); - - *type = type_color & CQ_DESC_TYPE_MASK; - *q_number = le16_to_cpu(desc->q_number) & CQ_DESC_Q_NUM_MASK; - *completed_index = le16_to_cpu(desc->completed_index) & - CQ_DESC_COMP_NDX_MASK; -} - -#endif /* _CQ_DESC_H_ */ |