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/drivers/scsi/fnic/cq_exch_desc.h

http://github.com/mirrors/linux
C Header | 182 lines | 149 code | 13 blank | 20 comment | 0 complexity | bf277c6a8728f5c96c687466bdc007e3 MD5 | raw file
  1/*
  2 * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
  3 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
  4 *
  5 * This program is free software; you may redistribute it and/or modify
  6 * it under the terms of the GNU General Public License as published by
  7 * the Free Software Foundation; version 2 of the License.
  8 *
  9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 16 * SOFTWARE.
 17 */
 18#ifndef _CQ_EXCH_DESC_H_
 19#define _CQ_EXCH_DESC_H_
 20
 21#include "cq_desc.h"
 22
 23/* Exchange completion queue descriptor: 16B */
 24struct cq_exch_wq_desc {
 25	u16 completed_index;
 26	u16 q_number;
 27	u16 exchange_id;
 28	u8  tmpl;
 29	u8  reserved0;
 30	u32 reserved1;
 31	u8  exch_status;
 32	u8  reserved2[2];
 33	u8  type_color;
 34};
 35
 36#define CQ_EXCH_WQ_STATUS_BITS      2
 37#define CQ_EXCH_WQ_STATUS_MASK      ((1 << CQ_EXCH_WQ_STATUS_BITS) - 1)
 38
 39enum cq_exch_status_types {
 40	CQ_EXCH_WQ_STATUS_TYPE_COMPLETE = 0,
 41	CQ_EXCH_WQ_STATUS_TYPE_ABORT = 1,
 42	CQ_EXCH_WQ_STATUS_TYPE_SGL_EOF = 2,
 43	CQ_EXCH_WQ_STATUS_TYPE_TMPL_ERR = 3,
 44};
 45
 46static inline void cq_exch_wq_desc_dec(struct cq_exch_wq_desc *desc_ptr,
 47				       u8  *type,
 48				       u8  *color,
 49				       u16 *q_number,
 50				       u16 *completed_index,
 51				       u8  *exch_status)
 52{
 53	cq_desc_dec((struct cq_desc *)desc_ptr, type,
 54		    color, q_number, completed_index);
 55	*exch_status = desc_ptr->exch_status & CQ_EXCH_WQ_STATUS_MASK;
 56}
 57
 58struct cq_fcp_rq_desc {
 59	u16 completed_index_eop_sop_prt;
 60	u16 q_number;
 61	u16 exchange_id;
 62	u16 tmpl;
 63	u16 bytes_written;
 64	u16 vlan;
 65	u8  sof;
 66	u8  eof;
 67	u8  fcs_fer_fck;
 68	u8  type_color;
 69};
 70
 71#define CQ_FCP_RQ_DESC_FLAGS_SOP		(1 << 15)
 72#define CQ_FCP_RQ_DESC_FLAGS_EOP		(1 << 14)
 73#define CQ_FCP_RQ_DESC_FLAGS_PRT		(1 << 12)
 74#define CQ_FCP_RQ_DESC_TMPL_MASK		0x1f
 75#define CQ_FCP_RQ_DESC_BYTES_WRITTEN_MASK	0x3fff
 76#define CQ_FCP_RQ_DESC_PACKET_ERR_SHIFT		14
 77#define CQ_FCP_RQ_DESC_PACKET_ERR_MASK (1 << CQ_FCP_RQ_DESC_PACKET_ERR_SHIFT)
 78#define CQ_FCP_RQ_DESC_VS_STRIPPED_SHIFT	15
 79#define CQ_FCP_RQ_DESC_VS_STRIPPED_MASK (1 << CQ_FCP_RQ_DESC_VS_STRIPPED_SHIFT)
 80#define CQ_FCP_RQ_DESC_FC_CRC_OK_MASK		0x1
 81#define CQ_FCP_RQ_DESC_FCOE_ERR_SHIFT		1
 82#define CQ_FCP_RQ_DESC_FCOE_ERR_MASK (1 << CQ_FCP_RQ_DESC_FCOE_ERR_SHIFT)
 83#define CQ_FCP_RQ_DESC_FCS_OK_SHIFT		7
 84#define CQ_FCP_RQ_DESC_FCS_OK_MASK (1 << CQ_FCP_RQ_DESC_FCS_OK_SHIFT)
 85
 86static inline void cq_fcp_rq_desc_dec(struct cq_fcp_rq_desc *desc_ptr,
 87				      u8  *type,
 88				      u8  *color,
 89				      u16 *q_number,
 90				      u16 *completed_index,
 91				      u8  *eop,
 92				      u8  *sop,
 93				      u8  *fck,
 94				      u16 *exchange_id,
 95				      u16 *tmpl,
 96				      u32 *bytes_written,
 97				      u8  *sof,
 98				      u8  *eof,
 99				      u8  *ingress_port,
100				      u8  *packet_err,
101				      u8  *fcoe_err,
102				      u8  *fcs_ok,
103				      u8  *vlan_stripped,
104				      u16 *vlan)
105{
106	cq_desc_dec((struct cq_desc *)desc_ptr, type,
107		    color, q_number, completed_index);
108	*eop = (desc_ptr->completed_index_eop_sop_prt &
109		CQ_FCP_RQ_DESC_FLAGS_EOP) ? 1 : 0;
110	*sop = (desc_ptr->completed_index_eop_sop_prt &
111		CQ_FCP_RQ_DESC_FLAGS_SOP) ? 1 : 0;
112	*ingress_port =
113		(desc_ptr->completed_index_eop_sop_prt &
114		 CQ_FCP_RQ_DESC_FLAGS_PRT) ? 1 : 0;
115	*exchange_id = desc_ptr->exchange_id;
116	*tmpl = desc_ptr->tmpl & CQ_FCP_RQ_DESC_TMPL_MASK;
117	*bytes_written =
118		desc_ptr->bytes_written & CQ_FCP_RQ_DESC_BYTES_WRITTEN_MASK;
119	*packet_err =
120		(desc_ptr->bytes_written & CQ_FCP_RQ_DESC_PACKET_ERR_MASK) >>
121		CQ_FCP_RQ_DESC_PACKET_ERR_SHIFT;
122	*vlan_stripped =
123		(desc_ptr->bytes_written & CQ_FCP_RQ_DESC_VS_STRIPPED_MASK) >>
124		CQ_FCP_RQ_DESC_VS_STRIPPED_SHIFT;
125	*vlan = desc_ptr->vlan;
126	*sof = desc_ptr->sof;
127	*fck = desc_ptr->fcs_fer_fck & CQ_FCP_RQ_DESC_FC_CRC_OK_MASK;
128	*fcoe_err = (desc_ptr->fcs_fer_fck & CQ_FCP_RQ_DESC_FCOE_ERR_MASK) >>
129		CQ_FCP_RQ_DESC_FCOE_ERR_SHIFT;
130	*eof = desc_ptr->eof;
131	*fcs_ok =
132		(desc_ptr->fcs_fer_fck & CQ_FCP_RQ_DESC_FCS_OK_MASK) >>
133		CQ_FCP_RQ_DESC_FCS_OK_SHIFT;
134}
135
136struct cq_sgl_desc {
137	u16 exchange_id;
138	u16 q_number;
139	u32 active_burst_offset;
140	u32 tot_data_bytes;
141	u16 tmpl;
142	u8  sgl_err;
143	u8  type_color;
144};
145
146enum cq_sgl_err_types {
147	CQ_SGL_ERR_NO_ERROR = 0,
148	CQ_SGL_ERR_OVERFLOW,         /* data ran beyond end of SGL */
149	CQ_SGL_ERR_SGL_LCL_ADDR_ERR, /* sgl access to local vnic addr illegal*/
150	CQ_SGL_ERR_ADDR_RSP_ERR,     /* sgl address error */
151	CQ_SGL_ERR_DATA_RSP_ERR,     /* sgl data rsp error */
152	CQ_SGL_ERR_CNT_ZERO_ERR,     /* SGL count is 0 */
153	CQ_SGL_ERR_CNT_MAX_ERR,      /* SGL count is larger than supported */
154	CQ_SGL_ERR_ORDER_ERR,        /* frames recv on both ports, order err */
155	CQ_SGL_ERR_DATA_LCL_ADDR_ERR,/* sgl data buf to local vnic addr ill */
156	CQ_SGL_ERR_HOST_CQ_ERR,      /* host cq entry to local vnic addr ill */
157};
158
159#define CQ_SGL_SGL_ERR_MASK             0x1f
160#define CQ_SGL_TMPL_MASK                0x1f
161
162static inline void cq_sgl_desc_dec(struct cq_sgl_desc *desc_ptr,
163				   u8  *type,
164				   u8  *color,
165				   u16 *q_number,
166				   u16 *exchange_id,
167				   u32 *active_burst_offset,
168				   u32 *tot_data_bytes,
169				   u16 *tmpl,
170				   u8  *sgl_err)
171{
172	/* Cheat a little by assuming exchange_id is the same as completed
173	   index */
174	cq_desc_dec((struct cq_desc *)desc_ptr, type, color, q_number,
175		    exchange_id);
176	*active_burst_offset = desc_ptr->active_burst_offset;
177	*tot_data_bytes = desc_ptr->tot_data_bytes;
178	*tmpl = desc_ptr->tmpl & CQ_SGL_TMPL_MASK;
179	*sgl_err = desc_ptr->sgl_err & CQ_SGL_SGL_ERR_MASK;
180}
181
182#endif /* _CQ_EXCH_DESC_H_ */