2 * linux/drivers/net/ehea/ehea_qmr.h
4 * eHEA ethernet device driver for IBM eServer System p
6 * (C) Copyright IBM Corp. 2006
9 * Christoph Raisch <raisch@de.ibm.com>
10 * Jan-Bernd Themann <themann@de.ibm.com>
11 * Thomas Klein <tklein@de.ibm.com>
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2, or (at your option)
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 #ifndef __EHEA_QMR_H__
30 #define __EHEA_QMR_H__
36 * page size of ehea hardware queues
39 #define EHEA_PAGESHIFT 12
40 #define EHEA_PAGESIZE 4096UL
42 /* Some abbreviations used here:
44 * WQE - Work Queue Entry
45 * SWQE - Send Work Queue Entry
46 * RWQE - Receive Work Queue Entry
47 * CQE - Completion Queue Entry
48 * EQE - Event Queue Entry
52 /* Use of WR_ID field for EHEA */
53 #define EHEA_WR_ID_COUNT EHEA_BMASK_IBM(0, 19)
54 #define EHEA_WR_ID_TYPE EHEA_BMASK_IBM(20, 23)
55 #define EHEA_SWQE2_TYPE 0x1
56 #define EHEA_SWQE3_TYPE 0x2
57 #define EHEA_RWQE2_TYPE 0x3
58 #define EHEA_RWQE3_TYPE 0x4
59 #define EHEA_WR_ID_INDEX EHEA_BMASK_IBM(24, 47)
60 #define EHEA_WR_ID_REFILL EHEA_BMASK_IBM(48, 63)
62 struct ehea_vsgentry {
68 /* maximum number of sg entries allowed in a WQE */
69 #define EHEA_MAX_WQE_SG_ENTRIES 252
70 #define SWQE2_MAX_IMM (0xD0 - 0x30)
71 #define SWQE3_MAX_IMM 224
73 /* tx control flags for swqe */
74 #define EHEA_SWQE_CRC 0x8000
75 #define EHEA_SWQE_IP_CHECKSUM 0x4000
76 #define EHEA_SWQE_TCP_CHECKSUM 0x2000
77 #define EHEA_SWQE_TSO 0x1000
78 #define EHEA_SWQE_SIGNALLED_COMPLETION 0x0800
79 #define EHEA_SWQE_VLAN_INSERT 0x0400
80 #define EHEA_SWQE_IMM_DATA_PRESENT 0x0200
81 #define EHEA_SWQE_DESCRIPTORS_PRESENT 0x0100
82 #define EHEA_SWQE_WRAP_CTL_REC 0x0080
83 #define EHEA_SWQE_WRAP_CTL_FORCE 0x0040
84 #define EHEA_SWQE_BIND 0x0020
85 #define EHEA_SWQE_PURGE 0x0010
87 /* sizeof(struct ehea_swqe) less the union */
88 #define SWQE_HEADER_SIZE 32
97 u8 immediate_data_length;
102 u8 descriptors; /* number of valid descriptors in WQE */
108 /* Send WQE Format 1 */
110 struct ehea_vsgentry sg_list[EHEA_MAX_WQE_SG_ENTRIES];
113 /* Send WQE Format 2 */
115 struct ehea_vsgentry sg_entry;
117 u8 immediate_data[SWQE2_MAX_IMM];
119 struct ehea_vsgentry sg_list[EHEA_MAX_WQE_SG_ENTRIES-1];
120 } immdata_desc __attribute__ ((packed));
122 /* Send WQE Format 3 */
124 u8 immediate_data[SWQE3_MAX_IMM];
130 u64 wr_id; /* work request ID */
136 struct ehea_vsgentry sg_list[EHEA_MAX_WQE_SG_ENTRIES];
139 #define EHEA_CQE_VLAN_TAG_XTRACT 0x0400
141 #define EHEA_CQE_TYPE_RQ 0x60
142 #define EHEA_CQE_STAT_ERR_MASK 0x721F
143 #define EHEA_CQE_STAT_FAT_ERR_MASK 0x1F
144 #define EHEA_CQE_STAT_ERR_TCP 0x4000
147 u64 wr_id; /* work request ID from WQE */
152 u16 num_bytes_transfered;
154 u16 inet_checksum_value;
166 #define EHEA_EQE_VALID EHEA_BMASK_IBM(0, 0)
167 #define EHEA_EQE_IS_CQE EHEA_BMASK_IBM(1, 1)
168 #define EHEA_EQE_IDENTIFIER EHEA_BMASK_IBM(2, 7)
169 #define EHEA_EQE_QP_CQ_NUMBER EHEA_BMASK_IBM(8, 31)
170 #define EHEA_EQE_QP_TOKEN EHEA_BMASK_IBM(32, 63)
171 #define EHEA_EQE_CQ_TOKEN EHEA_BMASK_IBM(32, 63)
172 #define EHEA_EQE_KEY EHEA_BMASK_IBM(32, 63)
173 #define EHEA_EQE_PORT_NUMBER EHEA_BMASK_IBM(56, 63)
174 #define EHEA_EQE_EQ_NUMBER EHEA_BMASK_IBM(48, 63)
175 #define EHEA_EQE_SM_ID EHEA_BMASK_IBM(48, 63)
176 #define EHEA_EQE_SM_MECH_NUMBER EHEA_BMASK_IBM(48, 55)
177 #define EHEA_EQE_SM_PORT_NUMBER EHEA_BMASK_IBM(56, 63)
183 static inline void *hw_qeit_calc(struct hw_queue *queue, u64 q_offset)
185 struct ehea_page *current_page;
187 if (q_offset >= queue->queue_length)
188 q_offset -= queue->queue_length;
189 current_page = (queue->queue_pages)[q_offset >> EHEA_PAGESHIFT];
190 return ¤t_page->entries[q_offset & (EHEA_PAGESIZE - 1)];
193 static inline void *hw_qeit_get(struct hw_queue *queue)
195 return hw_qeit_calc(queue, queue->current_q_offset);
198 static inline void hw_qeit_inc(struct hw_queue *queue)
200 queue->current_q_offset += queue->qe_size;
201 if (queue->current_q_offset >= queue->queue_length) {
202 queue->current_q_offset = 0;
203 /* toggle the valid flag */
204 queue->toggle_state = (~queue->toggle_state) & 1;
208 static inline void *hw_qeit_get_inc(struct hw_queue *queue)
210 void *retvalue = hw_qeit_get(queue);
215 static inline void *hw_qeit_get_inc_valid(struct hw_queue *queue)
217 struct ehea_cqe *retvalue = hw_qeit_get(queue);
218 u8 valid = retvalue->valid;
221 if ((valid >> 7) == (queue->toggle_state & 1)) {
222 /* this is a good one */
224 pref = hw_qeit_calc(queue, queue->current_q_offset);
226 prefetch(pref + 128);
232 static inline void *hw_qeit_get_valid(struct hw_queue *queue)
234 struct ehea_cqe *retvalue = hw_qeit_get(queue);
238 pref = hw_qeit_calc(queue, queue->current_q_offset);
240 prefetch(pref + 128);
241 prefetch(pref + 256);
242 valid = retvalue->valid;
243 if (!((valid >> 7) == (queue->toggle_state & 1)))
248 static inline void *hw_qeit_reset(struct hw_queue *queue)
250 queue->current_q_offset = 0;
251 return hw_qeit_get(queue);
254 static inline void *hw_qeit_eq_get_inc(struct hw_queue *queue)
256 u64 last_entry_in_q = queue->queue_length - queue->qe_size;
259 retvalue = hw_qeit_get(queue);
260 queue->current_q_offset += queue->qe_size;
261 if (queue->current_q_offset > last_entry_in_q) {
262 queue->current_q_offset = 0;
263 queue->toggle_state = (~queue->toggle_state) & 1;
268 static inline void *hw_eqit_eq_get_inc_valid(struct hw_queue *queue)
270 void *retvalue = hw_qeit_get(queue);
271 u32 qe = *(u8*)retvalue;
272 if ((qe >> 7) == (queue->toggle_state & 1))
273 hw_qeit_eq_get_inc(queue);
279 static inline struct ehea_rwqe *ehea_get_next_rwqe(struct ehea_qp *qp,
282 struct hw_queue *queue;
285 queue = &qp->hw_rqueue1;
287 queue = &qp->hw_rqueue2;
289 queue = &qp->hw_rqueue3;
291 return hw_qeit_get_inc(queue);
294 static inline struct ehea_swqe *ehea_get_swqe(struct ehea_qp *my_qp,
297 struct hw_queue *queue = &my_qp->hw_squeue;
298 struct ehea_swqe *wqe_p;
300 *wqe_index = (queue->current_q_offset) >> (7 + EHEA_SG_SQ);
301 wqe_p = hw_qeit_get_inc(&my_qp->hw_squeue);
306 static inline void ehea_post_swqe(struct ehea_qp *my_qp, struct ehea_swqe *swqe)
309 ehea_update_sqa(my_qp, 1);
312 static inline struct ehea_cqe *ehea_poll_rq1(struct ehea_qp *qp, int *wqe_index)
314 struct hw_queue *queue = &qp->hw_rqueue1;
316 *wqe_index = (queue->current_q_offset) >> (7 + EHEA_SG_RQ1);
317 return hw_qeit_get_valid(queue);
320 static inline void ehea_inc_rq1(struct ehea_qp *qp)
322 hw_qeit_inc(&qp->hw_rqueue1);
325 static inline struct ehea_cqe *ehea_poll_cq(struct ehea_cq *my_cq)
327 return hw_qeit_get_inc_valid(&my_cq->hw_queue);
330 #define EHEA_CQ_REGISTER_ORIG 0
331 #define EHEA_EQ_REGISTER_ORIG 0
334 EHEA_EQ = 0, /* event queue */
335 EHEA_NEQ /* notification event queue */
338 struct ehea_eq *ehea_create_eq(struct ehea_adapter *adapter,
339 enum ehea_eq_type type,
340 const u32 length, const u8 eqe_gen);
342 int ehea_destroy_eq(struct ehea_eq *eq);
344 struct ehea_eqe *ehea_poll_eq(struct ehea_eq *eq);
346 struct ehea_cq *ehea_create_cq(struct ehea_adapter *adapter, int cqe,
347 u64 eq_handle, u32 cq_token);
349 int ehea_destroy_cq(struct ehea_cq *cq);
351 struct ehea_qp *ehea_create_qp(struct ehea_adapter * adapter, u32 pd,
352 struct ehea_qp_init_attr *init_attr);
354 int ehea_destroy_qp(struct ehea_qp *qp);
356 int ehea_reg_mr_adapter(struct ehea_adapter *adapter);
358 #endif /* __EHEA_QMR_H__ */