diff options
Diffstat (limited to 'drivers/net/ehea/ehea_qmr.h')
| -rw-r--r-- | drivers/net/ehea/ehea_qmr.h | 358 |
1 files changed, 358 insertions, 0 deletions
diff --git a/drivers/net/ehea/ehea_qmr.h b/drivers/net/ehea/ehea_qmr.h new file mode 100644 index 000000000000..7efdc96919ca --- /dev/null +++ b/drivers/net/ehea/ehea_qmr.h @@ -0,0 +1,358 @@ +/* + * linux/drivers/net/ehea/ehea_qmr.h + * + * eHEA ethernet device driver for IBM eServer System p + * + * (C) Copyright IBM Corp. 2006 + * + * Authors: + * Christoph Raisch <raisch@de.ibm.com> + * Jan-Bernd Themann <themann@de.ibm.com> + * Thomas Klein <tklein@de.ibm.com> + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef __EHEA_QMR_H__ +#define __EHEA_QMR_H__ + +#include "ehea.h" +#include "ehea_hw.h" + +/* + * page size of ehea hardware queues + */ + +#define EHEA_PAGESHIFT 12 +#define EHEA_PAGESIZE 4096UL + +/* Some abbreviations used here: + * + * WQE - Work Queue Entry + * SWQE - Send Work Queue Entry + * RWQE - Receive Work Queue Entry + * CQE - Completion Queue Entry + * EQE - Event Queue Entry + * MR - Memory Region + */ + +/* Use of WR_ID field for EHEA */ +#define EHEA_WR_ID_COUNT EHEA_BMASK_IBM(0, 19) +#define EHEA_WR_ID_TYPE EHEA_BMASK_IBM(20, 23) +#define EHEA_SWQE2_TYPE 0x1 +#define EHEA_SWQE3_TYPE 0x2 +#define EHEA_RWQE2_TYPE 0x3 +#define EHEA_RWQE3_TYPE 0x4 +#define EHEA_WR_ID_INDEX EHEA_BMASK_IBM(24, 47) +#define EHEA_WR_ID_REFILL EHEA_BMASK_IBM(48, 63) + +struct ehea_vsgentry { + u64 vaddr; + u32 l_key; + u32 len; +}; + +/* maximum number of sg entries allowed in a WQE */ +#define EHEA_MAX_WQE_SG_ENTRIES 252 +#define SWQE2_MAX_IMM (0xD0 - 0x30) +#define SWQE3_MAX_IMM 224 + +/* tx control flags for swqe */ +#define EHEA_SWQE_CRC 0x8000 +#define EHEA_SWQE_IP_CHECKSUM 0x4000 +#define EHEA_SWQE_TCP_CHECKSUM 0x2000 +#define EHEA_SWQE_TSO 0x1000 +#define EHEA_SWQE_SIGNALLED_COMPLETION 0x0800 +#define EHEA_SWQE_VLAN_INSERT 0x0400 +#define EHEA_SWQE_IMM_DATA_PRESENT 0x0200 +#define EHEA_SWQE_DESCRIPTORS_PRESENT 0x0100 +#define EHEA_SWQE_WRAP_CTL_REC 0x0080 +#define EHEA_SWQE_WRAP_CTL_FORCE 0x0040 +#define EHEA_SWQE_BIND 0x0020 +#define EHEA_SWQE_PURGE 0x0010 + +/* sizeof(struct ehea_swqe) less the union */ +#define SWQE_HEADER_SIZE 32 + +struct ehea_swqe { + u64 wr_id; + u16 tx_control; + u16 vlan_tag; + u8 reserved1; + u8 ip_start; + u8 ip_end; + u8 immediate_data_length; + u8 tcp_offset; + u8 reserved2; + u16 tcp_end; + u8 wrap_tag; + u8 descriptors; /* number of valid descriptors in WQE */ + u16 reserved3; + u16 reserved4; + u16 mss; + u32 reserved5; + union { + /* Send WQE Format 1 */ + struct { + struct ehea_vsgentry sg_list[EHEA_MAX_WQE_SG_ENTRIES]; + } no_immediate_data; + + /* Send WQE Format 2 */ + struct { + struct ehea_vsgentry sg_entry; + /* 0x30 */ + u8 immediate_data[SWQE2_MAX_IMM]; + /* 0xd0 */ + struct ehea_vsgentry sg_list[EHEA_MAX_WQE_SG_ENTRIES-1]; + } immdata_desc __attribute__ ((packed)); + + /* Send WQE Format 3 */ + struct { + u8 immediate_data[SWQE3_MAX_IMM]; + } immdata_nodesc; + } u; +}; + +struct ehea_rwqe { + u64 wr_id; /* work request ID */ + u8 reserved1[5]; + u8 data_segments; + u16 reserved2; + u64 reserved3; + u64 reserved4; + struct ehea_vsgentry sg_list[EHEA_MAX_WQE_SG_ENTRIES]; +}; + +#define EHEA_CQE_VLAN_TAG_XTRACT 0x0400 + +#define EHEA_CQE_TYPE_RQ 0x60 +#define EHEA_CQE_STAT_ERR_MASK 0x721F +#define EHEA_CQE_STAT_FAT_ERR_MASK 0x1F +#define EHEA_CQE_STAT_ERR_TCP 0x4000 + +struct ehea_cqe { + u64 wr_id; /* work request ID from WQE */ + u8 type; + u8 valid; + u16 status; + u16 reserved1; + u16 num_bytes_transfered; + u16 vlan_tag; + u16 inet_checksum_value; + u8 reserved2; + u8 header_length; + u16 reserved3; + u16 page_offset; + u16 wqe_count; + u32 qp_token; + u32 timestamp; + u32 reserved4; + u64 reserved5[3]; +}; + +#define EHEA_EQE_VALID EHEA_BMASK_IBM(0, 0) +#define EHEA_EQE_IS_CQE EHEA_BMASK_IBM(1, 1) +#define EHEA_EQE_IDENTIFIER EHEA_BMASK_IBM(2, 7) +#define EHEA_EQE_QP_CQ_NUMBER EHEA_BMASK_IBM(8, 31) +#define EHEA_EQE_QP_TOKEN EHEA_BMASK_IBM(32, 63) +#define EHEA_EQE_CQ_TOKEN EHEA_BMASK_IBM(32, 63) +#define EHEA_EQE_KEY EHEA_BMASK_IBM(32, 63) +#define EHEA_EQE_PORT_NUMBER EHEA_BMASK_IBM(56, 63) +#define EHEA_EQE_EQ_NUMBER EHEA_BMASK_IBM(48, 63) +#define EHEA_EQE_SM_ID EHEA_BMASK_IBM(48, 63) +#define EHEA_EQE_SM_MECH_NUMBER EHEA_BMASK_IBM(48, 55) +#define EHEA_EQE_SM_PORT_NUMBER EHEA_BMASK_IBM(56, 63) + +struct ehea_eqe { + u64 entry; +}; + +static inline void *hw_qeit_calc(struct hw_queue *queue, u64 q_offset) +{ + struct ehea_page *current_page; + + if (q_offset >= queue->queue_length) + q_offset -= queue->queue_length; + current_page = (queue->queue_pages)[q_offset >> EHEA_PAGESHIFT]; + return ¤t_page->entries[q_offset & (EHEA_PAGESIZE - 1)]; +} + +static inline void *hw_qeit_get(struct hw_queue *queue) +{ + return hw_qeit_calc(queue, queue->current_q_offset); +} + +static inline void hw_qeit_inc(struct hw_queue *queue) +{ + queue->current_q_offset += queue->qe_size; + if (queue->current_q_offset >= queue->queue_length) { + queue->current_q_offset = 0; + /* toggle the valid flag */ + queue->toggle_state = (~queue->toggle_state) & 1; + } +} + +static inline void *hw_qeit_get_inc(struct hw_queue *queue) +{ + void *retvalue = hw_qeit_get(queue); + hw_qeit_inc(queue); + return retvalue; +} + +static inline void *hw_qeit_get_inc_valid(struct hw_queue *queue) +{ + struct ehea_cqe *retvalue = hw_qeit_get(queue); + u8 valid = retvalue->valid; + void *pref; + + if ((valid >> 7) == (queue->toggle_state & 1)) { + /* this is a good one */ + hw_qeit_inc(queue); + pref = hw_qeit_calc(queue, queue->current_q_offset); + prefetch(pref); + prefetch(pref + 128); + } else + retvalue = NULL; + return retvalue; +} + +static inline void *hw_qeit_get_valid(struct hw_queue *queue) +{ + struct ehea_cqe *retvalue = hw_qeit_get(queue); + void *pref; + u8 valid; + + pref = hw_qeit_calc(queue, queue->current_q_offset); + prefetch(pref); + prefetch(pref + 128); + prefetch(pref + 256); + valid = retvalue->valid; + if (!((valid >> 7) == (queue->toggle_state & 1))) + retvalue = NULL; + return retvalue; +} + +static inline void *hw_qeit_reset(struct hw_queue *queue) +{ + queue->current_q_offset = 0; + return hw_qeit_get(queue); +} + +static inline void *hw_qeit_eq_get_inc(struct hw_queue *queue) +{ + u64 last_entry_in_q = queue->queue_length - queue->qe_size; + void *retvalue; + + retvalue = hw_qeit_get(queue); + queue->current_q_offset += queue->qe_size; + if (queue->current_q_offset > last_entry_in_q) { + queue->current_q_offset = 0; + queue->toggle_state = (~queue->toggle_state) & 1; + } + return retvalue; +} + +static inline void *hw_eqit_eq_get_inc_valid(struct hw_queue *queue) +{ + void *retvalue = hw_qeit_get(queue); + u32 qe = *(u8*)retvalue; + if ((qe >> 7) == (queue->toggle_state & 1)) + hw_qeit_eq_get_inc(queue); + else + retvalue = NULL; + return retvalue; +} + +static inline struct ehea_rwqe *ehea_get_next_rwqe(struct ehea_qp *qp, + int rq_nr) +{ + struct hw_queue *queue; + + if (rq_nr == 1) + queue = &qp->hw_rqueue1; + else if (rq_nr == 2) + queue = &qp->hw_rqueue2; + else + queue = &qp->hw_rqueue3; + + return hw_qeit_get_inc(queue); +} + +static inline struct ehea_swqe *ehea_get_swqe(struct ehea_qp *my_qp, + int *wqe_index) +{ + struct hw_queue *queue = &my_qp->hw_squeue; + struct ehea_swqe *wqe_p; + + *wqe_index = (queue->current_q_offset) >> (7 + EHEA_SG_SQ); + wqe_p = hw_qeit_get_inc(&my_qp->hw_squeue); + + return wqe_p; +} + +static inline void ehea_post_swqe(struct ehea_qp *my_qp, struct ehea_swqe *swqe) +{ + iosync(); + ehea_update_sqa(my_qp, 1); +} + +static inline struct ehea_cqe *ehea_poll_rq1(struct ehea_qp *qp, int *wqe_index) +{ + struct hw_queue *queue = &qp->hw_rqueue1; + + *wqe_index = (queue->current_q_offset) >> (7 + EHEA_SG_RQ1); + return hw_qeit_get_valid(queue); +} + +static inline void ehea_inc_rq1(struct ehea_qp *qp) +{ + hw_qeit_inc(&qp->hw_rqueue1); +} + +static inline struct ehea_cqe *ehea_poll_cq(struct ehea_cq *my_cq) +{ + return hw_qeit_get_inc_valid(&my_cq->hw_queue); +} + +#define EHEA_CQ_REGISTER_ORIG 0 +#define EHEA_EQ_REGISTER_ORIG 0 + +enum ehea_eq_type { + EHEA_EQ = 0, /* event queue */ + EHEA_NEQ /* notification event queue */ +}; + +struct ehea_eq *ehea_create_eq(struct ehea_adapter *adapter, + enum ehea_eq_type type, + const u32 length, const u8 eqe_gen); + +int ehea_destroy_eq(struct ehea_eq *eq); + +struct ehea_eqe *ehea_poll_eq(struct ehea_eq *eq); + +struct ehea_cq *ehea_create_cq(struct ehea_adapter *adapter, int cqe, + u64 eq_handle, u32 cq_token); + +int ehea_destroy_cq(struct ehea_cq *cq); + +struct ehea_qp *ehea_create_qp(struct ehea_adapter * adapter, u32 pd, + struct ehea_qp_init_attr *init_attr); + +int ehea_destroy_qp(struct ehea_qp *qp); + +int ehea_reg_mr_adapter(struct ehea_adapter *adapter); + +#endif /* __EHEA_QMR_H__ */ |