405 lines
11 KiB
C
405 lines
11 KiB
C
/*
|
|
* linux/drivers/net/ethernet/ibm/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 <linux/prefetch.h>
|
|
#include "ehea.h"
|
|
#include "ehea_hw.h"
|
|
|
|
/*
|
|
* page size of ehea hardware queues
|
|
*/
|
|
|
|
#define EHEA_PAGESHIFT 12
|
|
#define EHEA_PAGESIZE (1UL << EHEA_PAGESHIFT)
|
|
#define EHEA_SECTSIZE (1UL << 24)
|
|
#define EHEA_PAGES_PER_SECTION (EHEA_SECTSIZE >> EHEA_PAGESHIFT)
|
|
#define EHEA_HUGEPAGESHIFT 34
|
|
#define EHEA_HUGEPAGE_SIZE (1UL << EHEA_HUGEPAGESHIFT)
|
|
#define EHEA_HUGEPAGE_PFN_MASK ((EHEA_HUGEPAGE_SIZE - 1) >> PAGE_SHIFT)
|
|
|
|
#if ((1UL << SECTION_SIZE_BITS) < EHEA_SECTSIZE)
|
|
#error eHEA module cannot work if kernel sectionsize < ehea sectionsize
|
|
#endif
|
|
|
|
/* 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 reserved2b;
|
|
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 __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 0x700F
|
|
#define EHEA_CQE_STAT_FAT_ERR_MASK 0xF
|
|
#define EHEA_CQE_BLIND_CKSUM 0x8000
|
|
#define EHEA_CQE_STAT_ERR_TCP 0x4000
|
|
#define EHEA_CQE_STAT_ERR_IP 0x2000
|
|
#define EHEA_CQE_STAT_ERR_CRC 0x1000
|
|
|
|
/* Defines which bad send cqe stati lead to a port reset */
|
|
#define EHEA_CQE_STAT_RESET_MASK 0x0002
|
|
|
|
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)
|
|
|
|
#define EHEA_AER_RESTYPE_QP 0x8
|
|
#define EHEA_AER_RESTYPE_CQ 0x4
|
|
#define EHEA_AER_RESTYPE_EQ 0x3
|
|
|
|
/* Defines which affiliated errors lead to a port reset */
|
|
#define EHEA_AER_RESET_MASK 0xFFFFFFFFFEFFFFFFULL
|
|
#define EHEA_AERR_RESET_MASK 0xFFFFFFFFFFFFFFFFULL
|
|
|
|
struct ehea_eqe {
|
|
u64 entry;
|
|
};
|
|
|
|
#define ERROR_DATA_LENGTH EHEA_BMASK_IBM(52, 63)
|
|
#define ERROR_DATA_TYPE EHEA_BMASK_IBM(0, 7)
|
|
|
|
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_cq(struct ehea_cq *cq)
|
|
{
|
|
hw_qeit_inc(&cq->hw_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_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_kernel_mr(struct ehea_adapter *adapter, struct ehea_mr *mr);
|
|
|
|
int ehea_gen_smr(struct ehea_adapter *adapter, struct ehea_mr *old_mr,
|
|
struct ehea_mr *shared_mr);
|
|
|
|
int ehea_rem_mr(struct ehea_mr *mr);
|
|
|
|
u64 ehea_error_data(struct ehea_adapter *adapter, u64 res_handle,
|
|
u64 *aer, u64 *aerr);
|
|
|
|
int ehea_add_sect_bmap(unsigned long pfn, unsigned long nr_pages);
|
|
int ehea_rem_sect_bmap(unsigned long pfn, unsigned long nr_pages);
|
|
int ehea_create_busmap(void);
|
|
void ehea_destroy_busmap(void);
|
|
u64 ehea_map_vaddr(void *caddr);
|
|
|
|
#endif /* __EHEA_QMR_H__ */
|