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 (1UL << EHEA_PAGESHIFT)
41 #define EHEA_SECTSIZE (1UL << 24)
42 #define EHEA_PAGES_PER_SECTION (EHEA_SECTSIZE >> EHEA_PAGESHIFT)
44 #if ((1UL << SECTION_SIZE_BITS) < EHEA_SECTSIZE)
45 #error eHEA module cannot work if kernel sectionsize < ehea sectionsize
48 /* Some abbreviations used here:
50 * WQE - Work Queue Entry
51 * SWQE - Send Work Queue Entry
52 * RWQE - Receive Work Queue Entry
53 * CQE - Completion Queue Entry
54 * EQE - Event Queue Entry
58 /* Use of WR_ID field for EHEA */
59 #define EHEA_WR_ID_COUNT EHEA_BMASK_IBM(0, 19)
60 #define EHEA_WR_ID_TYPE EHEA_BMASK_IBM(20, 23)
61 #define EHEA_SWQE2_TYPE 0x1
62 #define EHEA_SWQE3_TYPE 0x2
63 #define EHEA_RWQE2_TYPE 0x3
64 #define EHEA_RWQE3_TYPE 0x4
65 #define EHEA_WR_ID_INDEX EHEA_BMASK_IBM(24, 47)
66 #define EHEA_WR_ID_REFILL EHEA_BMASK_IBM(48, 63)
68 struct ehea_vsgentry {
74 /* maximum number of sg entries allowed in a WQE */
75 #define EHEA_MAX_WQE_SG_ENTRIES 252
76 #define SWQE2_MAX_IMM (0xD0 - 0x30)
77 #define SWQE3_MAX_IMM 224
79 /* tx control flags for swqe */
80 #define EHEA_SWQE_CRC 0x8000
81 #define EHEA_SWQE_IP_CHECKSUM 0x4000
82 #define EHEA_SWQE_TCP_CHECKSUM 0x2000
83 #define EHEA_SWQE_TSO 0x1000
84 #define EHEA_SWQE_SIGNALLED_COMPLETION 0x0800
85 #define EHEA_SWQE_VLAN_INSERT 0x0400
86 #define EHEA_SWQE_IMM_DATA_PRESENT 0x0200
87 #define EHEA_SWQE_DESCRIPTORS_PRESENT 0x0100
88 #define EHEA_SWQE_WRAP_CTL_REC 0x0080
89 #define EHEA_SWQE_WRAP_CTL_FORCE 0x0040
90 #define EHEA_SWQE_BIND 0x0020
91 #define EHEA_SWQE_PURGE 0x0010
93 /* sizeof(struct ehea_swqe) less the union */
94 #define SWQE_HEADER_SIZE 32
103 u8 immediate_data_length;
108 u8 descriptors; /* number of valid descriptors in WQE */
114 /* Send WQE Format 1 */
116 struct ehea_vsgentry sg_list[EHEA_MAX_WQE_SG_ENTRIES];
119 /* Send WQE Format 2 */
121 struct ehea_vsgentry sg_entry;
123 u8 immediate_data[SWQE2_MAX_IMM];
125 struct ehea_vsgentry sg_list[EHEA_MAX_WQE_SG_ENTRIES-1];
126 } immdata_desc __attribute__ ((packed));
128 /* Send WQE Format 3 */
130 u8 immediate_data[SWQE3_MAX_IMM];
136 u64 wr_id; /* work request ID */
142 struct ehea_vsgentry sg_list[EHEA_MAX_WQE_SG_ENTRIES];
145 #define EHEA_CQE_VLAN_TAG_XTRACT 0x0400
147 #define EHEA_CQE_TYPE_RQ 0x60
148 #define EHEA_CQE_STAT_ERR_MASK 0x700F
149 #define EHEA_CQE_STAT_FAT_ERR_MASK 0xF
150 #define EHEA_CQE_STAT_ERR_TCP 0x4000
151 #define EHEA_CQE_STAT_ERR_IP 0x2000
152 #define EHEA_CQE_STAT_ERR_CRC 0x1000
155 u64 wr_id; /* work request ID from WQE */
160 u16 num_bytes_transfered;
162 u16 inet_checksum_value;
174 #define EHEA_EQE_VALID EHEA_BMASK_IBM(0, 0)
175 #define EHEA_EQE_IS_CQE EHEA_BMASK_IBM(1, 1)
176 #define EHEA_EQE_IDENTIFIER EHEA_BMASK_IBM(2, 7)
177 #define EHEA_EQE_QP_CQ_NUMBER EHEA_BMASK_IBM(8, 31)
178 #define EHEA_EQE_QP_TOKEN EHEA_BMASK_IBM(32, 63)
179 #define EHEA_EQE_CQ_TOKEN EHEA_BMASK_IBM(32, 63)
180 #define EHEA_EQE_KEY EHEA_BMASK_IBM(32, 63)
181 #define EHEA_EQE_PORT_NUMBER EHEA_BMASK_IBM(56, 63)
182 #define EHEA_EQE_EQ_NUMBER EHEA_BMASK_IBM(48, 63)
183 #define EHEA_EQE_SM_ID EHEA_BMASK_IBM(48, 63)
184 #define EHEA_EQE_SM_MECH_NUMBER EHEA_BMASK_IBM(48, 55)
185 #define EHEA_EQE_SM_PORT_NUMBER EHEA_BMASK_IBM(56, 63)
191 #define ERROR_DATA_LENGTH EHEA_BMASK_IBM(52, 63)
192 #define ERROR_DATA_TYPE EHEA_BMASK_IBM(0, 7)
194 static inline void *hw_qeit_calc(struct hw_queue *queue, u64 q_offset)
196 struct ehea_page *current_page;
198 if (q_offset >= queue->queue_length)
199 q_offset -= queue->queue_length;
200 current_page = (queue->queue_pages)[q_offset >> EHEA_PAGESHIFT];
201 return ¤t_page->entries[q_offset & (EHEA_PAGESIZE - 1)];
204 static inline void *hw_qeit_get(struct hw_queue *queue)
206 return hw_qeit_calc(queue, queue->current_q_offset);
209 static inline void hw_qeit_inc(struct hw_queue *queue)
211 queue->current_q_offset += queue->qe_size;
212 if (queue->current_q_offset >= queue->queue_length) {
213 queue->current_q_offset = 0;
214 /* toggle the valid flag */
215 queue->toggle_state = (~queue->toggle_state) & 1;
219 static inline void *hw_qeit_get_inc(struct hw_queue *queue)
221 void *retvalue = hw_qeit_get(queue);
226 static inline void *hw_qeit_get_inc_valid(struct hw_queue *queue)
228 struct ehea_cqe *retvalue = hw_qeit_get(queue);
229 u8 valid = retvalue->valid;
232 if ((valid >> 7) == (queue->toggle_state & 1)) {
233 /* this is a good one */
235 pref = hw_qeit_calc(queue, queue->current_q_offset);
237 prefetch(pref + 128);
243 static inline void *hw_qeit_get_valid(struct hw_queue *queue)
245 struct ehea_cqe *retvalue = hw_qeit_get(queue);
249 pref = hw_qeit_calc(queue, queue->current_q_offset);
251 prefetch(pref + 128);
252 prefetch(pref + 256);
253 valid = retvalue->valid;
254 if (!((valid >> 7) == (queue->toggle_state & 1)))
259 static inline void *hw_qeit_reset(struct hw_queue *queue)
261 queue->current_q_offset = 0;
262 return hw_qeit_get(queue);
265 static inline void *hw_qeit_eq_get_inc(struct hw_queue *queue)
267 u64 last_entry_in_q = queue->queue_length - queue->qe_size;
270 retvalue = hw_qeit_get(queue);
271 queue->current_q_offset += queue->qe_size;
272 if (queue->current_q_offset > last_entry_in_q) {
273 queue->current_q_offset = 0;
274 queue->toggle_state = (~queue->toggle_state) & 1;
279 static inline void *hw_eqit_eq_get_inc_valid(struct hw_queue *queue)
281 void *retvalue = hw_qeit_get(queue);
282 u32 qe = *(u8 *)retvalue;
283 if ((qe >> 7) == (queue->toggle_state & 1))
284 hw_qeit_eq_get_inc(queue);
290 static inline struct ehea_rwqe *ehea_get_next_rwqe(struct ehea_qp *qp,
293 struct hw_queue *queue;
296 queue = &qp->hw_rqueue1;
298 queue = &qp->hw_rqueue2;
300 queue = &qp->hw_rqueue3;
302 return hw_qeit_get_inc(queue);
305 static inline struct ehea_swqe *ehea_get_swqe(struct ehea_qp *my_qp,
308 struct hw_queue *queue = &my_qp->hw_squeue;
309 struct ehea_swqe *wqe_p;
311 *wqe_index = (queue->current_q_offset) >> (7 + EHEA_SG_SQ);
312 wqe_p = hw_qeit_get_inc(&my_qp->hw_squeue);
317 static inline void ehea_post_swqe(struct ehea_qp *my_qp, struct ehea_swqe *swqe)
320 ehea_update_sqa(my_qp, 1);
323 static inline struct ehea_cqe *ehea_poll_rq1(struct ehea_qp *qp, int *wqe_index)
325 struct hw_queue *queue = &qp->hw_rqueue1;
327 *wqe_index = (queue->current_q_offset) >> (7 + EHEA_SG_RQ1);
328 return hw_qeit_get_valid(queue);
331 static inline void ehea_inc_cq(struct ehea_cq *cq)
333 hw_qeit_inc(&cq->hw_queue);
336 static inline void ehea_inc_rq1(struct ehea_qp *qp)
338 hw_qeit_inc(&qp->hw_rqueue1);
341 static inline struct ehea_cqe *ehea_poll_cq(struct ehea_cq *my_cq)
343 return hw_qeit_get_valid(&my_cq->hw_queue);
346 #define EHEA_CQ_REGISTER_ORIG 0
347 #define EHEA_EQ_REGISTER_ORIG 0
350 EHEA_EQ = 0, /* event queue */
351 EHEA_NEQ /* notification event queue */
354 struct ehea_eq *ehea_create_eq(struct ehea_adapter *adapter,
355 enum ehea_eq_type type,
356 const u32 length, const u8 eqe_gen);
358 int ehea_destroy_eq(struct ehea_eq *eq);
360 struct ehea_eqe *ehea_poll_eq(struct ehea_eq *eq);
362 struct ehea_cq *ehea_create_cq(struct ehea_adapter *adapter, int cqe,
363 u64 eq_handle, u32 cq_token);
365 int ehea_destroy_cq(struct ehea_cq *cq);
367 struct ehea_qp *ehea_create_qp(struct ehea_adapter *adapter, u32 pd,
368 struct ehea_qp_init_attr *init_attr);
370 int ehea_destroy_qp(struct ehea_qp *qp);
372 int ehea_reg_kernel_mr(struct ehea_adapter *adapter, struct ehea_mr *mr);
374 int ehea_gen_smr(struct ehea_adapter *adapter, struct ehea_mr *old_mr,
375 struct ehea_mr *shared_mr);
377 int ehea_rem_mr(struct ehea_mr *mr);
379 void ehea_error_data(struct ehea_adapter *adapter, u64 res_handle);
381 int ehea_create_busmap(void);
382 void ehea_destroy_busmap(void);
383 u64 ehea_map_vaddr(void *caddr);
385 #endif /* __EHEA_QMR_H__ */