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linux/drivers/scsi/bnx2i/bnx2i_hwi.c

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/* bnx2i_hwi.c: Broadcom NetXtreme II iSCSI driver.
*
* Copyright (c) 2006 - 2013 Broadcom Corporation
* Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved.
* Copyright (c) 2007, 2008 Mike Christie
*
* 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.
*
* Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
* Maintained by: Eddie Wai (eddie.wai@broadcom.com)
*/
#include <linux/gfp.h>
#include <scsi/scsi_tcq.h>
#include <scsi/libiscsi.h>
#include "bnx2i.h"
DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);
/**
* bnx2i_get_cid_num - get cid from ep
* @ep: endpoint pointer
*
* Only applicable to 57710 family of devices
*/
static u32 bnx2i_get_cid_num(struct bnx2i_endpoint *ep)
{
u32 cid;
if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
cid = ep->ep_cid;
else
cid = GET_CID_NUM(ep->ep_cid);
return cid;
}
/**
* bnx2i_adjust_qp_size - Adjust SQ/RQ/CQ size for 57710 device type
* @hba: Adapter for which adjustments is to be made
*
* Only applicable to 57710 family of devices
*/
static void bnx2i_adjust_qp_size(struct bnx2i_hba *hba)
{
u32 num_elements_per_pg;
if (test_bit(BNX2I_NX2_DEV_5706, &hba->cnic_dev_type) ||
test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type) ||
test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
if (!is_power_of_2(hba->max_sqes))
hba->max_sqes = rounddown_pow_of_two(hba->max_sqes);
if (!is_power_of_2(hba->max_rqes))
hba->max_rqes = rounddown_pow_of_two(hba->max_rqes);
}
/* Adjust each queue size if the user selection does not
* yield integral num of page buffers
*/
/* adjust SQ */
num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
if (hba->max_sqes < num_elements_per_pg)
hba->max_sqes = num_elements_per_pg;
else if (hba->max_sqes % num_elements_per_pg)
hba->max_sqes = (hba->max_sqes + num_elements_per_pg - 1) &
~(num_elements_per_pg - 1);
/* adjust CQ */
num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_CQE_SIZE;
if (hba->max_cqes < num_elements_per_pg)
hba->max_cqes = num_elements_per_pg;
else if (hba->max_cqes % num_elements_per_pg)
hba->max_cqes = (hba->max_cqes + num_elements_per_pg - 1) &
~(num_elements_per_pg - 1);
/* adjust RQ */
num_elements_per_pg = CNIC_PAGE_SIZE / BNX2I_RQ_WQE_SIZE;
if (hba->max_rqes < num_elements_per_pg)
hba->max_rqes = num_elements_per_pg;
else if (hba->max_rqes % num_elements_per_pg)
hba->max_rqes = (hba->max_rqes + num_elements_per_pg - 1) &
~(num_elements_per_pg - 1);
}
/**
* bnx2i_get_link_state - get network interface link state
* @hba: adapter instance pointer
*
* updates adapter structure flag based on netdev state
*/
static void bnx2i_get_link_state(struct bnx2i_hba *hba)
{
if (test_bit(__LINK_STATE_NOCARRIER, &hba->netdev->state))
set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
else
clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
}
/**
* bnx2i_iscsi_license_error - displays iscsi license related error message
* @hba: adapter instance pointer
* @error_code: error classification
*
* Puts out an error log when driver is unable to offload iscsi connection
* due to license restrictions
*/
static void bnx2i_iscsi_license_error(struct bnx2i_hba *hba, u32 error_code)
{
if (error_code == ISCSI_KCQE_COMPLETION_STATUS_ISCSI_NOT_SUPPORTED)
/* iSCSI offload not supported on this device */
printk(KERN_ERR "bnx2i: iSCSI not supported, dev=%s\n",
hba->netdev->name);
if (error_code == ISCSI_KCQE_COMPLETION_STATUS_LOM_ISCSI_NOT_ENABLED)
/* iSCSI offload not supported on this LOM device */
printk(KERN_ERR "bnx2i: LOM is not enable to "
"offload iSCSI connections, dev=%s\n",
hba->netdev->name);
set_bit(ADAPTER_STATE_INIT_FAILED, &hba->adapter_state);
}
/**
* bnx2i_arm_cq_event_coalescing - arms CQ to enable EQ notification
* @ep: endpoint (transport identifier) structure
* @action: action, ARM or DISARM. For now only ARM_CQE is used
*
* Arm'ing CQ will enable chip to generate global EQ events inorder to interrupt
* the driver. EQ event is generated CQ index is hit or at least 1 CQ is
* outstanding and on chip timer expires
*/
int bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action)
{
struct bnx2i_5771x_cq_db *cq_db;
u16 cq_index;
u16 next_index = 0;
u32 num_active_cmds;
/* Coalesce CQ entries only on 10G devices */
if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
return 0;
/* Do not update CQ DB multiple times before firmware writes
* '0xFFFF' to CQDB->SQN field. Deviation may cause spurious
* interrupts and other unwanted results
*/
cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
if (action != CNIC_ARM_CQE_FP)
if (cq_db->sqn[0] && cq_db->sqn[0] != 0xFFFF)
return 0;
if (action == CNIC_ARM_CQE || action == CNIC_ARM_CQE_FP) {
num_active_cmds = atomic_read(&ep->num_active_cmds);
if (num_active_cmds <= event_coal_min)
next_index = 1;
else {
next_index = num_active_cmds >> ep->ec_shift;
if (next_index > num_active_cmds - event_coal_min)
next_index = num_active_cmds - event_coal_min;
}
if (!next_index)
next_index = 1;
cq_index = ep->qp.cqe_exp_seq_sn + next_index - 1;
if (cq_index > ep->qp.cqe_size * 2)
cq_index -= ep->qp.cqe_size * 2;
if (!cq_index)
cq_index = 1;
cq_db->sqn[0] = cq_index;
}
return next_index;
}
/**
* bnx2i_get_rq_buf - copy RQ buffer contents to driver buffer
* @conn: iscsi connection on which RQ event occurred
* @ptr: driver buffer to which RQ buffer contents is to
* be copied
* @len: length of valid data inside RQ buf
*
* Copies RQ buffer contents from shared (DMA'able) memory region to
* driver buffer. RQ is used to DMA unsolicitated iscsi pdu's and
* scsi sense info
*/
void bnx2i_get_rq_buf(struct bnx2i_conn *bnx2i_conn, char *ptr, int len)
{
if (!bnx2i_conn->ep->qp.rqe_left)
return;
bnx2i_conn->ep->qp.rqe_left--;
memcpy(ptr, (u8 *) bnx2i_conn->ep->qp.rq_cons_qe, len);
if (bnx2i_conn->ep->qp.rq_cons_qe == bnx2i_conn->ep->qp.rq_last_qe) {
bnx2i_conn->ep->qp.rq_cons_qe = bnx2i_conn->ep->qp.rq_first_qe;
bnx2i_conn->ep->qp.rq_cons_idx = 0;
} else {
bnx2i_conn->ep->qp.rq_cons_qe++;
bnx2i_conn->ep->qp.rq_cons_idx++;
}
}
static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn)
{
struct bnx2i_5771x_dbell dbell;
u32 msg;
memset(&dbell, 0, sizeof(dbell));
dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE <<
B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT);
msg = *((u32 *)&dbell);
/* TODO : get doorbell register mapping */
writel(cpu_to_le32(msg), conn->ep->qp.ctx_base);
}
/**
* bnx2i_put_rq_buf - Replenish RQ buffer, if required ring on chip doorbell
* @conn: iscsi connection on which event to post
* @count: number of RQ buffer being posted to chip
*
* No need to ring hardware doorbell for 57710 family of devices
*/
void bnx2i_put_rq_buf(struct bnx2i_conn *bnx2i_conn, int count)
{
struct bnx2i_5771x_sq_rq_db *rq_db;
u16 hi_bit = (bnx2i_conn->ep->qp.rq_prod_idx & 0x8000);
struct bnx2i_endpoint *ep = bnx2i_conn->ep;
ep->qp.rqe_left += count;
ep->qp.rq_prod_idx &= 0x7FFF;
ep->qp.rq_prod_idx += count;
if (ep->qp.rq_prod_idx > bnx2i_conn->hba->max_rqes) {
ep->qp.rq_prod_idx %= bnx2i_conn->hba->max_rqes;
if (!hi_bit)
ep->qp.rq_prod_idx |= 0x8000;
} else
ep->qp.rq_prod_idx |= hi_bit;
if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
rq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.rq_pgtbl_virt;
rq_db->prod_idx = ep->qp.rq_prod_idx;
/* no need to ring hardware doorbell for 57710 */
} else {
writew(ep->qp.rq_prod_idx,
ep->qp.ctx_base + CNIC_RECV_DOORBELL);
}
mmiowb();
}
/**
* bnx2i_ring_sq_dbell - Ring SQ doorbell to wake-up the processing engine
* @conn: iscsi connection to which new SQ entries belong
* @count: number of SQ WQEs to post
*
* SQ DB is updated in host memory and TX Doorbell is rung for 57710 family
* of devices. For 5706/5708/5709 new SQ WQE count is written into the
* doorbell register
*/
static void bnx2i_ring_sq_dbell(struct bnx2i_conn *bnx2i_conn, int count)
{
struct bnx2i_5771x_sq_rq_db *sq_db;
struct bnx2i_endpoint *ep = bnx2i_conn->ep;
atomic_inc(&ep->num_active_cmds);
wmb(); /* flush SQ WQE memory before the doorbell is rung */
if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
sq_db = (struct bnx2i_5771x_sq_rq_db *) ep->qp.sq_pgtbl_virt;
sq_db->prod_idx = ep->qp.sq_prod_idx;
bnx2i_ring_577xx_doorbell(bnx2i_conn);
} else
writew(count, ep->qp.ctx_base + CNIC_SEND_DOORBELL);
mmiowb(); /* flush posted PCI writes */
}
/**
* bnx2i_ring_dbell_update_sq_params - update SQ driver parameters
* @conn: iscsi connection to which new SQ entries belong
* @count: number of SQ WQEs to post
*
* this routine will update SQ driver parameters and ring the doorbell
*/
static void bnx2i_ring_dbell_update_sq_params(struct bnx2i_conn *bnx2i_conn,
int count)
{
int tmp_cnt;
if (count == 1) {
if (bnx2i_conn->ep->qp.sq_prod_qe ==
bnx2i_conn->ep->qp.sq_last_qe)
bnx2i_conn->ep->qp.sq_prod_qe =
bnx2i_conn->ep->qp.sq_first_qe;
else
bnx2i_conn->ep->qp.sq_prod_qe++;
} else {
if ((bnx2i_conn->ep->qp.sq_prod_qe + count) <=
bnx2i_conn->ep->qp.sq_last_qe)
bnx2i_conn->ep->qp.sq_prod_qe += count;
else {
tmp_cnt = bnx2i_conn->ep->qp.sq_last_qe -
bnx2i_conn->ep->qp.sq_prod_qe;
bnx2i_conn->ep->qp.sq_prod_qe =
&bnx2i_conn->ep->qp.sq_first_qe[count -
(tmp_cnt + 1)];
}
}
bnx2i_conn->ep->qp.sq_prod_idx += count;
/* Ring the doorbell */
bnx2i_ring_sq_dbell(bnx2i_conn, bnx2i_conn->ep->qp.sq_prod_idx);
}
/**
* bnx2i_send_iscsi_login - post iSCSI login request MP WQE to hardware
* @conn: iscsi connection
* @cmd: driver command structure which is requesting
* a WQE to sent to chip for further processing
*
* prepare and post an iSCSI Login request WQE to CNIC firmware
*/
int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn,
struct iscsi_task *task)
{
struct bnx2i_cmd *bnx2i_cmd;
struct bnx2i_login_request *login_wqe;
struct iscsi_login_req *login_hdr;
u32 dword;
bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
login_hdr = (struct iscsi_login_req *)task->hdr;
login_wqe = (struct bnx2i_login_request *)
bnx2i_conn->ep->qp.sq_prod_qe;
login_wqe->op_code = login_hdr->opcode;
login_wqe->op_attr = login_hdr->flags;
login_wqe->version_max = login_hdr->max_version;
login_wqe->version_min = login_hdr->min_version;
login_wqe->data_length = ntoh24(login_hdr->dlength);
login_wqe->isid_lo = *((u32 *) login_hdr->isid);
login_wqe->isid_hi = *((u16 *) login_hdr->isid + 2);
login_wqe->tsih = login_hdr->tsih;
login_wqe->itt = task->itt |
(ISCSI_TASK_TYPE_MPATH << ISCSI_LOGIN_REQUEST_TYPE_SHIFT);
login_wqe->cid = login_hdr->cid;
login_wqe->cmd_sn = be32_to_cpu(login_hdr->cmdsn);
login_wqe->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
login_wqe->flags = ISCSI_LOGIN_REQUEST_UPDATE_EXP_STAT_SN;
login_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
login_wqe->resp_bd_list_addr_hi =
(u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
dword = ((1 << ISCSI_LOGIN_REQUEST_NUM_RESP_BDS_SHIFT) |
(bnx2i_conn->gen_pdu.resp_buf_size <<
ISCSI_LOGIN_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
login_wqe->resp_buffer = dword;
login_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
login_wqe->bd_list_addr_hi =
(u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
login_wqe->num_bds = 1;
login_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
return 0;
}
/**
* bnx2i_send_iscsi_tmf - post iSCSI task management request MP WQE to hardware
* @conn: iscsi connection
* @mtask: driver command structure which is requesting
* a WQE to sent to chip for further processing
*
* prepare and post an iSCSI Login request WQE to CNIC firmware
*/
int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn,
struct iscsi_task *mtask)
{
struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
struct iscsi_tm *tmfabort_hdr;
struct scsi_cmnd *ref_sc;
struct iscsi_task *ctask;
struct bnx2i_cmd *bnx2i_cmd;
struct bnx2i_tmf_request *tmfabort_wqe;
u32 dword;
u32 scsi_lun[2];
bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
tmfabort_hdr = (struct iscsi_tm *)mtask->hdr;
tmfabort_wqe = (struct bnx2i_tmf_request *)
bnx2i_conn->ep->qp.sq_prod_qe;
tmfabort_wqe->op_code = tmfabort_hdr->opcode;
tmfabort_wqe->op_attr = tmfabort_hdr->flags;
tmfabort_wqe->itt = (mtask->itt | (ISCSI_TASK_TYPE_MPATH << 14));
tmfabort_wqe->reserved2 = 0;
tmfabort_wqe->cmd_sn = be32_to_cpu(tmfabort_hdr->cmdsn);
switch (tmfabort_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) {
case ISCSI_TM_FUNC_ABORT_TASK:
case ISCSI_TM_FUNC_TASK_REASSIGN:
ctask = iscsi_itt_to_task(conn, tmfabort_hdr->rtt);
if (!ctask || !ctask->sc)
/*
* the iscsi layer must have completed the cmd while
* was starting up.
*
* Note: In the case of a SCSI cmd timeout, the task's
* sc is still active; hence ctask->sc != 0
* In this case, the task must be aborted
*/
return 0;
ref_sc = ctask->sc;
if (ref_sc->sc_data_direction == DMA_TO_DEVICE)
dword = (ISCSI_TASK_TYPE_WRITE <<
ISCSI_CMD_REQUEST_TYPE_SHIFT);
else
dword = (ISCSI_TASK_TYPE_READ <<
ISCSI_CMD_REQUEST_TYPE_SHIFT);
tmfabort_wqe->ref_itt = (dword |
(tmfabort_hdr->rtt & ISCSI_ITT_MASK));
break;
default:
tmfabort_wqe->ref_itt = RESERVED_ITT;
}
memcpy(scsi_lun, &tmfabort_hdr->lun, sizeof(struct scsi_lun));
tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]);
tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]);
tmfabort_wqe->ref_cmd_sn = be32_to_cpu(tmfabort_hdr->refcmdsn);
tmfabort_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
tmfabort_wqe->bd_list_addr_hi = (u32)
((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
tmfabort_wqe->num_bds = 1;
tmfabort_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
return 0;
}
/**
* bnx2i_send_iscsi_text - post iSCSI text WQE to hardware
* @conn: iscsi connection
* @mtask: driver command structure which is requesting
* a WQE to sent to chip for further processing
*
* prepare and post an iSCSI Text request WQE to CNIC firmware
*/
int bnx2i_send_iscsi_text(struct bnx2i_conn *bnx2i_conn,
struct iscsi_task *mtask)
{
struct bnx2i_cmd *bnx2i_cmd;
struct bnx2i_text_request *text_wqe;
struct iscsi_text *text_hdr;
u32 dword;
bnx2i_cmd = (struct bnx2i_cmd *)mtask->dd_data;
text_hdr = (struct iscsi_text *)mtask->hdr;
text_wqe = (struct bnx2i_text_request *) bnx2i_conn->ep->qp.sq_prod_qe;
memset(text_wqe, 0, sizeof(struct bnx2i_text_request));
text_wqe->op_code = text_hdr->opcode;
text_wqe->op_attr = text_hdr->flags;
text_wqe->data_length = ntoh24(text_hdr->dlength);
text_wqe->itt = mtask->itt |
(ISCSI_TASK_TYPE_MPATH << ISCSI_TEXT_REQUEST_TYPE_SHIFT);
text_wqe->ttt = be32_to_cpu(text_hdr->ttt);
text_wqe->cmd_sn = be32_to_cpu(text_hdr->cmdsn);
text_wqe->resp_bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_bd_dma;
text_wqe->resp_bd_list_addr_hi =
(u32) ((u64) bnx2i_conn->gen_pdu.resp_bd_dma >> 32);
dword = ((1 << ISCSI_TEXT_REQUEST_NUM_RESP_BDS_SHIFT) |
(bnx2i_conn->gen_pdu.resp_buf_size <<
ISCSI_TEXT_REQUEST_RESP_BUFFER_LENGTH_SHIFT));
text_wqe->resp_buffer = dword;
text_wqe->bd_list_addr_lo = (u32) bnx2i_conn->gen_pdu.req_bd_dma;
text_wqe->bd_list_addr_hi =
(u32) ((u64) bnx2i_conn->gen_pdu.req_bd_dma >> 32);
text_wqe->num_bds = 1;
text_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
return 0;
}
/**
* bnx2i_send_iscsi_scsicmd - post iSCSI scsicmd request WQE to hardware
* @conn: iscsi connection
* @cmd: driver command structure which is requesting
* a WQE to sent to chip for further processing
*
* prepare and post an iSCSI SCSI-CMD request WQE to CNIC firmware
*/
int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *bnx2i_conn,
struct bnx2i_cmd *cmd)
{
struct bnx2i_cmd_request *scsi_cmd_wqe;
scsi_cmd_wqe = (struct bnx2i_cmd_request *)
bnx2i_conn->ep->qp.sq_prod_qe;
memcpy(scsi_cmd_wqe, &cmd->req, sizeof(struct bnx2i_cmd_request));
scsi_cmd_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
return 0;
}
/**
* bnx2i_send_iscsi_nopout - post iSCSI NOPOUT request WQE to hardware
* @conn: iscsi connection
* @cmd: driver command structure which is requesting
* a WQE to sent to chip for further processing
* @datap: payload buffer pointer
* @data_len: payload data length
* @unsol: indicated whether nopout pdu is unsolicited pdu or
* in response to target's NOPIN w/ TTT != FFFFFFFF
*
* prepare and post a nopout request WQE to CNIC firmware
*/
int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn,
struct iscsi_task *task,
char *datap, int data_len, int unsol)
{
struct bnx2i_endpoint *ep = bnx2i_conn->ep;
struct bnx2i_cmd *bnx2i_cmd;
struct bnx2i_nop_out_request *nopout_wqe;
struct iscsi_nopout *nopout_hdr;
bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
nopout_hdr = (struct iscsi_nopout *)task->hdr;
nopout_wqe = (struct bnx2i_nop_out_request *)ep->qp.sq_prod_qe;
memset(nopout_wqe, 0x00, sizeof(struct bnx2i_nop_out_request));
nopout_wqe->op_code = nopout_hdr->opcode;
nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL;
memcpy(nopout_wqe->lun, &nopout_hdr->lun, 8);
if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
u32 tmp = nopout_wqe->lun[0];
/* 57710 requires LUN field to be swapped */
nopout_wqe->lun[0] = nopout_wqe->lun[1];
nopout_wqe->lun[1] = tmp;
}
nopout_wqe->itt = ((u16)task->itt |
(ISCSI_TASK_TYPE_MPATH <<
ISCSI_TMF_REQUEST_TYPE_SHIFT));
nopout_wqe->ttt = be32_to_cpu(nopout_hdr->ttt);
nopout_wqe->flags = 0;
if (!unsol)
nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
else if (nopout_hdr->itt == RESERVED_ITT)
nopout_wqe->flags = ISCSI_NOP_OUT_REQUEST_LOCAL_COMPLETION;
nopout_wqe->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
nopout_wqe->data_length = data_len;
if (data_len) {
/* handle payload data, not required in first release */
printk(KERN_ALERT "NOPOUT: WARNING!! payload len != 0\n");
} else {
nopout_wqe->bd_list_addr_lo = (u32)
bnx2i_conn->hba->mp_bd_dma;
nopout_wqe->bd_list_addr_hi =
(u32) ((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
nopout_wqe->num_bds = 1;
}
nopout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
return 0;
}
/**
* bnx2i_send_iscsi_logout - post iSCSI logout request WQE to hardware
* @conn: iscsi connection
* @cmd: driver command structure which is requesting
* a WQE to sent to chip for further processing
*
* prepare and post logout request WQE to CNIC firmware
*/
int bnx2i_send_iscsi_logout(struct bnx2i_conn *bnx2i_conn,
struct iscsi_task *task)
{
struct bnx2i_cmd *bnx2i_cmd;
struct bnx2i_logout_request *logout_wqe;
struct iscsi_logout *logout_hdr;
bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
logout_hdr = (struct iscsi_logout *)task->hdr;
logout_wqe = (struct bnx2i_logout_request *)
bnx2i_conn->ep->qp.sq_prod_qe;
memset(logout_wqe, 0x00, sizeof(struct bnx2i_logout_request));
logout_wqe->op_code = logout_hdr->opcode;
logout_wqe->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
logout_wqe->op_attr =
logout_hdr->flags | ISCSI_LOGOUT_REQUEST_ALWAYS_ONE;
logout_wqe->itt = ((u16)task->itt |
(ISCSI_TASK_TYPE_MPATH <<
ISCSI_LOGOUT_REQUEST_TYPE_SHIFT));
logout_wqe->data_length = 0;
logout_wqe->cid = 0;
logout_wqe->bd_list_addr_lo = (u32) bnx2i_conn->hba->mp_bd_dma;
logout_wqe->bd_list_addr_hi = (u32)
((u64) bnx2i_conn->hba->mp_bd_dma >> 32);
logout_wqe->num_bds = 1;
logout_wqe->cq_index = 0; /* CQ# used for completion, 5771x only */
bnx2i_conn->ep->state = EP_STATE_LOGOUT_SENT;
bnx2i_ring_dbell_update_sq_params(bnx2i_conn, 1);
return 0;
}
/**
* bnx2i_update_iscsi_conn - post iSCSI logout request WQE to hardware
* @conn: iscsi connection which requires iscsi parameter update
*
* sends down iSCSI Conn Update request to move iSCSI conn to FFP
*/
void bnx2i_update_iscsi_conn(struct iscsi_conn *conn)
{
struct bnx2i_conn *bnx2i_conn = conn->dd_data;
struct bnx2i_hba *hba = bnx2i_conn->hba;
struct kwqe *kwqe_arr[2];
struct iscsi_kwqe_conn_update *update_wqe;
struct iscsi_kwqe_conn_update conn_update_kwqe;
update_wqe = &conn_update_kwqe;
update_wqe->hdr.op_code = ISCSI_KWQE_OPCODE_UPDATE_CONN;
update_wqe->hdr.flags =
(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
/* 5771x requires conn context id to be passed as is */
if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_conn->ep->hba->cnic_dev_type))
update_wqe->context_id = bnx2i_conn->ep->ep_cid;
else
update_wqe->context_id = (bnx2i_conn->ep->ep_cid >> 7);
update_wqe->conn_flags = 0;
if (conn->hdrdgst_en)
update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_HEADER_DIGEST;
if (conn->datadgst_en)
update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_DATA_DIGEST;
if (conn->session->initial_r2t_en)
update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_INITIAL_R2T;
if (conn->session->imm_data_en)
update_wqe->conn_flags |= ISCSI_KWQE_CONN_UPDATE_IMMEDIATE_DATA;
update_wqe->max_send_pdu_length = conn->max_xmit_dlength;
update_wqe->max_recv_pdu_length = conn->max_recv_dlength;
update_wqe->first_burst_length = conn->session->first_burst;
update_wqe->max_burst_length = conn->session->max_burst;
update_wqe->exp_stat_sn = conn->exp_statsn;
update_wqe->max_outstanding_r2ts = conn->session->max_r2t;
update_wqe->session_error_recovery_level = conn->session->erl;
iscsi_conn_printk(KERN_ALERT, conn,
"bnx2i: conn update - MBL 0x%x FBL 0x%x"
"MRDSL_I 0x%x MRDSL_T 0x%x \n",
update_wqe->max_burst_length,
update_wqe->first_burst_length,
update_wqe->max_recv_pdu_length,
update_wqe->max_send_pdu_length);
kwqe_arr[0] = (struct kwqe *) update_wqe;
if (hba->cnic && hba->cnic->submit_kwqes)
hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
}
/**
* bnx2i_ep_ofld_timer - post iSCSI logout request WQE to hardware
* @data: endpoint (transport handle) structure pointer
*
* routine to handle connection offload/destroy request timeout
*/
void bnx2i_ep_ofld_timer(unsigned long data)
{
struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) data;
if (ep->state == EP_STATE_OFLD_START) {
printk(KERN_ALERT "ofld_timer: CONN_OFLD timeout\n");
ep->state = EP_STATE_OFLD_FAILED;
} else if (ep->state == EP_STATE_DISCONN_START) {
printk(KERN_ALERT "ofld_timer: CONN_DISCON timeout\n");
ep->state = EP_STATE_DISCONN_TIMEDOUT;
} else if (ep->state == EP_STATE_CLEANUP_START) {
printk(KERN_ALERT "ofld_timer: CONN_CLEANUP timeout\n");
ep->state = EP_STATE_CLEANUP_FAILED;
}
wake_up_interruptible(&ep->ofld_wait);
}
static int bnx2i_power_of2(u32 val)
{
u32 power = 0;
if (val & (val - 1))
return power;
val--;
while (val) {
val = val >> 1;
power++;
}
return power;
}
/**
* bnx2i_send_cmd_cleanup_req - send iscsi cmd context clean-up request
* @hba: adapter structure pointer
* @cmd: driver command structure which is requesting
* a WQE to sent to chip for further processing
*
* prepares and posts CONN_OFLD_REQ1/2 KWQE
*/
void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
{
struct bnx2i_cleanup_request *cmd_cleanup;
cmd_cleanup =
(struct bnx2i_cleanup_request *)cmd->conn->ep->qp.sq_prod_qe;
memset(cmd_cleanup, 0x00, sizeof(struct bnx2i_cleanup_request));
cmd_cleanup->op_code = ISCSI_OPCODE_CLEANUP_REQUEST;
cmd_cleanup->itt = cmd->req.itt;
cmd_cleanup->cq_index = 0; /* CQ# used for completion, 5771x only */
bnx2i_ring_dbell_update_sq_params(cmd->conn, 1);
}
/**
* bnx2i_send_conn_destroy - initiates iscsi connection teardown process
* @hba: adapter structure pointer
* @ep: endpoint (transport identifier) structure
*
* this routine prepares and posts CONN_OFLD_REQ1/2 KWQE to initiate
* iscsi connection context clean-up process
*/
int bnx2i_send_conn_destroy(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
{
struct kwqe *kwqe_arr[2];
struct iscsi_kwqe_conn_destroy conn_cleanup;
int rc = -EINVAL;
memset(&conn_cleanup, 0x00, sizeof(struct iscsi_kwqe_conn_destroy));
conn_cleanup.hdr.op_code = ISCSI_KWQE_OPCODE_DESTROY_CONN;
conn_cleanup.hdr.flags =
(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
/* 5771x requires conn context id to be passed as is */
if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
conn_cleanup.context_id = ep->ep_cid;
else
conn_cleanup.context_id = (ep->ep_cid >> 7);
conn_cleanup.reserved0 = (u16)ep->ep_iscsi_cid;
kwqe_arr[0] = (struct kwqe *) &conn_cleanup;
if (hba->cnic && hba->cnic->submit_kwqes)
rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 1);
return rc;
}
/**
* bnx2i_570x_send_conn_ofld_req - initiates iscsi conn context setup process
* @hba: adapter structure pointer
* @ep: endpoint (transport identifier) structure
*
* 5706/5708/5709 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
*/
static int bnx2i_570x_send_conn_ofld_req(struct bnx2i_hba *hba,
struct bnx2i_endpoint *ep)
{
struct kwqe *kwqe_arr[2];
struct iscsi_kwqe_conn_offload1 ofld_req1;
struct iscsi_kwqe_conn_offload2 ofld_req2;
dma_addr_t dma_addr;
int num_kwqes = 2;
u32 *ptbl;
int rc = -EINVAL;
ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
ofld_req1.hdr.flags =
(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
dma_addr = ep->qp.sq_pgtbl_phys;
ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
dma_addr = ep->qp.cq_pgtbl_phys;
ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
ofld_req2.hdr.flags =
(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
dma_addr = ep->qp.rq_pgtbl_phys;
ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
ofld_req2.sq_first_pte.hi = *ptbl++;
ofld_req2.sq_first_pte.lo = *ptbl;
ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
ofld_req2.cq_first_pte.hi = *ptbl++;
ofld_req2.cq_first_pte.lo = *ptbl;
kwqe_arr[0] = (struct kwqe *) &ofld_req1;
kwqe_arr[1] = (struct kwqe *) &ofld_req2;
ofld_req2.num_additional_wqes = 0;
if (hba->cnic && hba->cnic->submit_kwqes)
rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
return rc;
}
/**
* bnx2i_5771x_send_conn_ofld_req - initiates iscsi connection context creation
* @hba: adapter structure pointer
* @ep: endpoint (transport identifier) structure
*
* 57710 specific - prepares and posts CONN_OFLD_REQ1/2 KWQE
*/
static int bnx2i_5771x_send_conn_ofld_req(struct bnx2i_hba *hba,
struct bnx2i_endpoint *ep)
{
struct kwqe *kwqe_arr[5];
struct iscsi_kwqe_conn_offload1 ofld_req1;
struct iscsi_kwqe_conn_offload2 ofld_req2;
struct iscsi_kwqe_conn_offload3 ofld_req3[1];
dma_addr_t dma_addr;
int num_kwqes = 2;
u32 *ptbl;
int rc = -EINVAL;
ofld_req1.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN1;
ofld_req1.hdr.flags =
(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
ofld_req1.iscsi_conn_id = (u16) ep->ep_iscsi_cid;
dma_addr = ep->qp.sq_pgtbl_phys + ISCSI_SQ_DB_SIZE;
ofld_req1.sq_page_table_addr_lo = (u32) dma_addr;
ofld_req1.sq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
dma_addr = ep->qp.cq_pgtbl_phys + ISCSI_CQ_DB_SIZE;
ofld_req1.cq_page_table_addr_lo = (u32) dma_addr;
ofld_req1.cq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
ofld_req2.hdr.op_code = ISCSI_KWQE_OPCODE_OFFLOAD_CONN2;
ofld_req2.hdr.flags =
(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
dma_addr = ep->qp.rq_pgtbl_phys + ISCSI_RQ_DB_SIZE;
ofld_req2.rq_page_table_addr_lo = (u32) dma_addr;
ofld_req2.rq_page_table_addr_hi = (u32) ((u64) dma_addr >> 32);
ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
ofld_req2.sq_first_pte.hi = *ptbl++;
ofld_req2.sq_first_pte.lo = *ptbl;
ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
ofld_req2.cq_first_pte.hi = *ptbl++;
ofld_req2.cq_first_pte.lo = *ptbl;
kwqe_arr[0] = (struct kwqe *) &ofld_req1;
kwqe_arr[1] = (struct kwqe *) &ofld_req2;
ofld_req2.num_additional_wqes = 1;
memset(ofld_req3, 0x00, sizeof(ofld_req3[0]));
ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
ofld_req3[0].qp_first_pte[0].hi = *ptbl++;
ofld_req3[0].qp_first_pte[0].lo = *ptbl;
kwqe_arr[2] = (struct kwqe *) ofld_req3;
/* need if we decide to go with multiple KCQE's per conn */
num_kwqes += 1;
if (hba->cnic && hba->cnic->submit_kwqes)
rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, num_kwqes);
return rc;
}
/**
* bnx2i_send_conn_ofld_req - initiates iscsi connection context setup process
*
* @hba: adapter structure pointer
* @ep: endpoint (transport identifier) structure
*
* this routine prepares and posts CONN_OFLD_REQ1/2 KWQE
*/
int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
{
int rc;
if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
rc = bnx2i_5771x_send_conn_ofld_req(hba, ep);
else
rc = bnx2i_570x_send_conn_ofld_req(hba, ep);
return rc;
}
/**
* setup_qp_page_tables - iscsi QP page table setup function
* @ep: endpoint (transport identifier) structure
*
* Sets up page tables for SQ/RQ/CQ, 1G/sec (5706/5708/5709) devices requires
* 64-bit address in big endian format. Whereas 10G/sec (57710) requires
* PT in little endian format
*/
static void setup_qp_page_tables(struct bnx2i_endpoint *ep)
{
int num_pages;
u32 *ptbl;
dma_addr_t page;
int cnic_dev_10g;
if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
cnic_dev_10g = 1;
else
cnic_dev_10g = 0;
/* SQ page table */
memset(ep->qp.sq_pgtbl_virt, 0, ep->qp.sq_pgtbl_size);
num_pages = ep->qp.sq_mem_size / CNIC_PAGE_SIZE;
page = ep->qp.sq_phys;
if (cnic_dev_10g)
ptbl = (u32 *)((u8 *)ep->qp.sq_pgtbl_virt + ISCSI_SQ_DB_SIZE);
else
ptbl = (u32 *) ep->qp.sq_pgtbl_virt;
while (num_pages--) {
if (cnic_dev_10g) {
/* PTE is written in little endian format for 57710 */
*ptbl = (u32) page;
ptbl++;
*ptbl = (u32) ((u64) page >> 32);
ptbl++;
page += CNIC_PAGE_SIZE;
} else {
/* PTE is written in big endian format for
* 5706/5708/5709 devices */
*ptbl = (u32) ((u64) page >> 32);
ptbl++;
*ptbl = (u32) page;
ptbl++;
page += CNIC_PAGE_SIZE;
}
}
/* RQ page table */
memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size);
num_pages = ep->qp.rq_mem_size / CNIC_PAGE_SIZE;
page = ep->qp.rq_phys;
if (cnic_dev_10g)
ptbl = (u32 *)((u8 *)ep->qp.rq_pgtbl_virt + ISCSI_RQ_DB_SIZE);
else
ptbl = (u32 *) ep->qp.rq_pgtbl_virt;
while (num_pages--) {
if (cnic_dev_10g) {
/* PTE is written in little endian format for 57710 */
*ptbl = (u32) page;
ptbl++;
*ptbl = (u32) ((u64) page >> 32);
ptbl++;
page += CNIC_PAGE_SIZE;
} else {
/* PTE is written in big endian format for
* 5706/5708/5709 devices */
*ptbl = (u32) ((u64) page >> 32);
ptbl++;
*ptbl = (u32) page;
ptbl++;
page += CNIC_PAGE_SIZE;
}
}
/* CQ page table */
memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size);
num_pages = ep->qp.cq_mem_size / CNIC_PAGE_SIZE;
page = ep->qp.cq_phys;
if (cnic_dev_10g)
ptbl = (u32 *)((u8 *)ep->qp.cq_pgtbl_virt + ISCSI_CQ_DB_SIZE);
else
ptbl = (u32 *) ep->qp.cq_pgtbl_virt;
while (num_pages--) {
if (cnic_dev_10g) {
/* PTE is written in little endian format for 57710 */
*ptbl = (u32) page;
ptbl++;
*ptbl = (u32) ((u64) page >> 32);
ptbl++;
page += CNIC_PAGE_SIZE;
} else {
/* PTE is written in big endian format for
* 5706/5708/5709 devices */
*ptbl = (u32) ((u64) page >> 32);
ptbl++;
*ptbl = (u32) page;
ptbl++;
page += CNIC_PAGE_SIZE;
}
}
}
/**
* bnx2i_alloc_qp_resc - allocates required resources for QP.
* @hba: adapter structure pointer
* @ep: endpoint (transport identifier) structure
*
* Allocate QP (transport layer for iSCSI connection) resources, DMA'able
* memory for SQ/RQ/CQ and page tables. EP structure elements such
* as producer/consumer indexes/pointers, queue sizes and page table
* contents are setup
*/
int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
{
struct bnx2i_5771x_cq_db *cq_db;
ep->hba = hba;
ep->conn = NULL;
ep->ep_cid = ep->ep_iscsi_cid = ep->ep_pg_cid = 0;
/* Allocate page table memory for SQ which is page aligned */
ep->qp.sq_mem_size = hba->max_sqes * BNX2I_SQ_WQE_SIZE;
ep->qp.sq_mem_size =
(ep->qp.sq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
ep->qp.sq_pgtbl_size =
(ep->qp.sq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
ep->qp.sq_pgtbl_size =
(ep->qp.sq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
ep->qp.sq_pgtbl_virt =
dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
&ep->qp.sq_pgtbl_phys, GFP_KERNEL);
if (!ep->qp.sq_pgtbl_virt) {
printk(KERN_ALERT "bnx2i: unable to alloc SQ PT mem (%d)\n",
ep->qp.sq_pgtbl_size);
goto mem_alloc_err;
}
/* Allocate memory area for actual SQ element */
ep->qp.sq_virt =
dma_alloc_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
&ep->qp.sq_phys, GFP_KERNEL);
if (!ep->qp.sq_virt) {
printk(KERN_ALERT "bnx2i: unable to alloc SQ BD memory %d\n",
ep->qp.sq_mem_size);
goto mem_alloc_err;
}
memset(ep->qp.sq_virt, 0x00, ep->qp.sq_mem_size);
ep->qp.sq_first_qe = ep->qp.sq_virt;
ep->qp.sq_prod_qe = ep->qp.sq_first_qe;
ep->qp.sq_cons_qe = ep->qp.sq_first_qe;
ep->qp.sq_last_qe = &ep->qp.sq_first_qe[hba->max_sqes - 1];
ep->qp.sq_prod_idx = 0;
ep->qp.sq_cons_idx = 0;
ep->qp.sqe_left = hba->max_sqes;
/* Allocate page table memory for CQ which is page aligned */
ep->qp.cq_mem_size = hba->max_cqes * BNX2I_CQE_SIZE;
ep->qp.cq_mem_size =
(ep->qp.cq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
ep->qp.cq_pgtbl_size =
(ep->qp.cq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
ep->qp.cq_pgtbl_size =
(ep->qp.cq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
ep->qp.cq_pgtbl_virt =
dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
&ep->qp.cq_pgtbl_phys, GFP_KERNEL);
if (!ep->qp.cq_pgtbl_virt) {
printk(KERN_ALERT "bnx2i: unable to alloc CQ PT memory %d\n",
ep->qp.cq_pgtbl_size);
goto mem_alloc_err;
}
/* Allocate memory area for actual CQ element */
ep->qp.cq_virt =
dma_alloc_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
&ep->qp.cq_phys, GFP_KERNEL);
if (!ep->qp.cq_virt) {
printk(KERN_ALERT "bnx2i: unable to alloc CQ BD memory %d\n",
ep->qp.cq_mem_size);
goto mem_alloc_err;
}
memset(ep->qp.cq_virt, 0x00, ep->qp.cq_mem_size);
ep->qp.cq_first_qe = ep->qp.cq_virt;
ep->qp.cq_prod_qe = ep->qp.cq_first_qe;
ep->qp.cq_cons_qe = ep->qp.cq_first_qe;
ep->qp.cq_last_qe = &ep->qp.cq_first_qe[hba->max_cqes - 1];
ep->qp.cq_prod_idx = 0;
ep->qp.cq_cons_idx = 0;
ep->qp.cqe_left = hba->max_cqes;
ep->qp.cqe_exp_seq_sn = ISCSI_INITIAL_SN;
ep->qp.cqe_size = hba->max_cqes;
/* Invalidate all EQ CQE index, req only for 57710 */
cq_db = (struct bnx2i_5771x_cq_db *) ep->qp.cq_pgtbl_virt;
memset(cq_db->sqn, 0xFF, sizeof(cq_db->sqn[0]) * BNX2X_MAX_CQS);
/* Allocate page table memory for RQ which is page aligned */
ep->qp.rq_mem_size = hba->max_rqes * BNX2I_RQ_WQE_SIZE;
ep->qp.rq_mem_size =
(ep->qp.rq_mem_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
ep->qp.rq_pgtbl_size =
(ep->qp.rq_mem_size / CNIC_PAGE_SIZE) * sizeof(void *);
ep->qp.rq_pgtbl_size =
(ep->qp.rq_pgtbl_size + (CNIC_PAGE_SIZE - 1)) & CNIC_PAGE_MASK;
ep->qp.rq_pgtbl_virt =
dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
&ep->qp.rq_pgtbl_phys, GFP_KERNEL);
if (!ep->qp.rq_pgtbl_virt) {
printk(KERN_ALERT "bnx2i: unable to alloc RQ PT mem %d\n",
ep->qp.rq_pgtbl_size);
goto mem_alloc_err;
}
/* Allocate memory area for actual RQ element */
ep->qp.rq_virt =
dma_alloc_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
&ep->qp.rq_phys, GFP_KERNEL);
if (!ep->qp.rq_virt) {
printk(KERN_ALERT "bnx2i: unable to alloc RQ BD memory %d\n",
ep->qp.rq_mem_size);
goto mem_alloc_err;
}
ep->qp.rq_first_qe = ep->qp.rq_virt;
ep->qp.rq_prod_qe = ep->qp.rq_first_qe;
ep->qp.rq_cons_qe = ep->qp.rq_first_qe;
ep->qp.rq_last_qe = &ep->qp.rq_first_qe[hba->max_rqes - 1];
ep->qp.rq_prod_idx = 0x8000;
ep->qp.rq_cons_idx = 0;
ep->qp.rqe_left = hba->max_rqes;
setup_qp_page_tables(ep);
return 0;
mem_alloc_err:
bnx2i_free_qp_resc(hba, ep);
return -ENOMEM;
}
/**
* bnx2i_free_qp_resc - free memory resources held by QP
* @hba: adapter structure pointer
* @ep: endpoint (transport identifier) structure
*
* Free QP resources - SQ/RQ/CQ memory and page tables.
*/
void bnx2i_free_qp_resc(struct bnx2i_hba *hba, struct bnx2i_endpoint *ep)
{
if (ep->qp.ctx_base) {
iounmap(ep->qp.ctx_base);
ep->qp.ctx_base = NULL;
}
/* Free SQ mem */
if (ep->qp.sq_pgtbl_virt) {
dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_pgtbl_size,
ep->qp.sq_pgtbl_virt, ep->qp.sq_pgtbl_phys);
ep->qp.sq_pgtbl_virt = NULL;
ep->qp.sq_pgtbl_phys = 0;
}
if (ep->qp.sq_virt) {
dma_free_coherent(&hba->pcidev->dev, ep->qp.sq_mem_size,
ep->qp.sq_virt, ep->qp.sq_phys);
ep->qp.sq_virt = NULL;
ep->qp.sq_phys = 0;
}
/* Free RQ mem */
if (ep->qp.rq_pgtbl_virt) {
dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_pgtbl_size,
ep->qp.rq_pgtbl_virt, ep->qp.rq_pgtbl_phys);
ep->qp.rq_pgtbl_virt = NULL;
ep->qp.rq_pgtbl_phys = 0;
}
if (ep->qp.rq_virt) {
dma_free_coherent(&hba->pcidev->dev, ep->qp.rq_mem_size,
ep->qp.rq_virt, ep->qp.rq_phys);
ep->qp.rq_virt = NULL;
ep->qp.rq_phys = 0;
}
/* Free CQ mem */
if (ep->qp.cq_pgtbl_virt) {
dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_pgtbl_size,
ep->qp.cq_pgtbl_virt, ep->qp.cq_pgtbl_phys);
ep->qp.cq_pgtbl_virt = NULL;
ep->qp.cq_pgtbl_phys = 0;
}
if (ep->qp.cq_virt) {
dma_free_coherent(&hba->pcidev->dev, ep->qp.cq_mem_size,
ep->qp.cq_virt, ep->qp.cq_phys);
ep->qp.cq_virt = NULL;
ep->qp.cq_phys = 0;
}
}
/**
* bnx2i_send_fw_iscsi_init_msg - initiates initial handshake with iscsi f/w
* @hba: adapter structure pointer
*
* Send down iscsi_init KWQEs which initiates the initial handshake with the f/w
* This results in iSCSi support validation and on-chip context manager
* initialization. Firmware completes this handshake with a CQE carrying
* the result of iscsi support validation. Parameter carried by
* iscsi init request determines the number of offloaded connection and
* tolerance level for iscsi protocol violation this hba/chip can support
*/
int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba)
{
struct kwqe *kwqe_arr[3];
struct iscsi_kwqe_init1 iscsi_init;
struct iscsi_kwqe_init2 iscsi_init2;
int rc = 0;
u64 mask64;
memset(&iscsi_init, 0x00, sizeof(struct iscsi_kwqe_init1));
memset(&iscsi_init2, 0x00, sizeof(struct iscsi_kwqe_init2));
bnx2i_adjust_qp_size(hba);
iscsi_init.flags =
(CNIC_PAGE_BITS - 8) << ISCSI_KWQE_INIT1_PAGE_SIZE_SHIFT;
if (en_tcp_dack)
iscsi_init.flags |= ISCSI_KWQE_INIT1_DELAYED_ACK_ENABLE;
iscsi_init.reserved0 = 0;
iscsi_init.num_cqs = 1;
iscsi_init.hdr.op_code = ISCSI_KWQE_OPCODE_INIT1;
iscsi_init.hdr.flags =
(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
iscsi_init.dummy_buffer_addr_lo = (u32) hba->dummy_buf_dma;
iscsi_init.dummy_buffer_addr_hi =
(u32) ((u64) hba->dummy_buf_dma >> 32);
hba->num_ccell = hba->max_sqes >> 1;
hba->ctx_ccell_tasks =
((hba->num_ccell & 0xFFFF) | (hba->max_sqes << 16));
iscsi_init.num_ccells_per_conn = hba->num_ccell;
iscsi_init.num_tasks_per_conn = hba->max_sqes;
iscsi_init.sq_wqes_per_page = CNIC_PAGE_SIZE / BNX2I_SQ_WQE_SIZE;
iscsi_init.sq_num_wqes = hba->max_sqes;
iscsi_init.cq_log_wqes_per_page =
(u8) bnx2i_power_of2(CNIC_PAGE_SIZE / BNX2I_CQE_SIZE);
iscsi_init.cq_num_wqes = hba->max_cqes;
iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE +
(CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE;
iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE +
(CNIC_PAGE_SIZE - 1)) / CNIC_PAGE_SIZE;
iscsi_init.rq_buffer_size = BNX2I_RQ_WQE_SIZE;
iscsi_init.rq_num_wqes = hba->max_rqes;
iscsi_init2.hdr.op_code = ISCSI_KWQE_OPCODE_INIT2;
iscsi_init2.hdr.flags =
(ISCSI_KWQE_LAYER_CODE << ISCSI_KWQE_HEADER_LAYER_CODE_SHIFT);
iscsi_init2.max_cq_sqn = hba->max_cqes * 2 + 1;
mask64 = 0x0ULL;
mask64 |= (
/* CISCO MDS */
(1UL <<
ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV) |
/* HP MSA1510i */
(1UL <<
ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN) |
/* EMC */
(1ULL << ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN));
if (error_mask1) {
iscsi_init2.error_bit_map[0] = error_mask1;
mask64 ^= (u32)(mask64);
mask64 |= error_mask1;
} else
iscsi_init2.error_bit_map[0] = (u32) mask64;
if (error_mask2) {
iscsi_init2.error_bit_map[1] = error_mask2;
mask64 &= 0xffffffff;
mask64 |= ((u64)error_mask2 << 32);
} else
iscsi_init2.error_bit_map[1] = (u32) (mask64 >> 32);
iscsi_error_mask = mask64;
kwqe_arr[0] = (struct kwqe *) &iscsi_init;
kwqe_arr[1] = (struct kwqe *) &iscsi_init2;
if (hba->cnic && hba->cnic->submit_kwqes)
rc = hba->cnic->submit_kwqes(hba->cnic, kwqe_arr, 2);
return rc;
}
/**
* bnx2i_process_scsi_cmd_resp - this function handles scsi cmd completion.
* @session: iscsi session
* @bnx2i_conn: bnx2i connection
* @cqe: pointer to newly DMA'ed CQE entry for processing
*
* process SCSI CMD Response CQE & complete the request to SCSI-ML
*/
int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
struct bnx2i_conn *bnx2i_conn,
struct cqe *cqe)
{
struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
struct bnx2i_hba *hba = bnx2i_conn->hba;
struct bnx2i_cmd_response *resp_cqe;
struct bnx2i_cmd *bnx2i_cmd;
struct iscsi_task *task;
struct iscsi_scsi_rsp *hdr;
u32 datalen = 0;
resp_cqe = (struct bnx2i_cmd_response *)cqe;
spin_lock_bh(&session->back_lock);
task = iscsi_itt_to_task(conn,
resp_cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
if (!task)
goto fail;
bnx2i_cmd = task->dd_data;
if (bnx2i_cmd->req.op_attr & ISCSI_CMD_REQUEST_READ) {
conn->datain_pdus_cnt +=
resp_cqe->task_stat.read_stat.num_data_ins;
conn->rxdata_octets +=
bnx2i_cmd->req.total_data_transfer_length;
ADD_STATS_64(hba, rx_pdus,
resp_cqe->task_stat.read_stat.num_data_ins);
ADD_STATS_64(hba, rx_bytes,
bnx2i_cmd->req.total_data_transfer_length);
} else {
conn->dataout_pdus_cnt +=
resp_cqe->task_stat.write_stat.num_data_outs;
conn->r2t_pdus_cnt +=
resp_cqe->task_stat.write_stat.num_r2ts;
conn->txdata_octets +=
bnx2i_cmd->req.total_data_transfer_length;
ADD_STATS_64(hba, tx_pdus,
resp_cqe->task_stat.write_stat.num_data_outs);
ADD_STATS_64(hba, tx_bytes,
bnx2i_cmd->req.total_data_transfer_length);
ADD_STATS_64(hba, rx_pdus,
resp_cqe->task_stat.write_stat.num_r2ts);
}
bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);
hdr = (struct iscsi_scsi_rsp *)task->hdr;
resp_cqe = (struct bnx2i_cmd_response *)cqe;
hdr->opcode = resp_cqe->op_code;
hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn);
hdr->exp_cmdsn = cpu_to_be32(resp_cqe->exp_cmd_sn);
hdr->response = resp_cqe->response;
hdr->cmd_status = resp_cqe->status;
hdr->flags = resp_cqe->response_flags;
hdr->residual_count = cpu_to_be32(resp_cqe->residual_count);
if (resp_cqe->op_code == ISCSI_OP_SCSI_DATA_IN)
goto done;
if (resp_cqe->status == SAM_STAT_CHECK_CONDITION) {
datalen = resp_cqe->data_length;
if (datalen < 2)
goto done;
if (datalen > BNX2I_RQ_WQE_SIZE) {
iscsi_conn_printk(KERN_ERR, conn,
"sense data len %d > RQ sz\n",
datalen);
datalen = BNX2I_RQ_WQE_SIZE;
} else if (datalen > ISCSI_DEF_MAX_RECV_SEG_LEN) {
iscsi_conn_printk(KERN_ERR, conn,
"sense data len %d > conn data\n",
datalen);
datalen = ISCSI_DEF_MAX_RECV_SEG_LEN;
}
bnx2i_get_rq_buf(bnx2i_cmd->conn, conn->data, datalen);
bnx2i_put_rq_buf(bnx2i_cmd->conn, 1);
}
done:
__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
conn->data, datalen);
fail:
spin_unlock_bh(&session->back_lock);
return 0;
}
/**
* bnx2i_process_login_resp - this function handles iscsi login response
* @session: iscsi session pointer
* @bnx2i_conn: iscsi connection pointer
* @cqe: pointer to newly DMA'ed CQE entry for processing
*
* process Login Response CQE & complete it to open-iscsi user daemon
*/
static int bnx2i_process_login_resp(struct iscsi_session *session,
struct bnx2i_conn *bnx2i_conn,
struct cqe *cqe)
{
struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
struct iscsi_task *task;
struct bnx2i_login_response *login;
struct iscsi_login_rsp *resp_hdr;
int pld_len;
int pad_len;
login = (struct bnx2i_login_response *) cqe;
spin_lock(&session->back_lock);
task = iscsi_itt_to_task(conn,
login->itt & ISCSI_LOGIN_RESPONSE_INDEX);
if (!task)
goto done;
resp_hdr = (struct iscsi_login_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
resp_hdr->opcode = login->op_code;
resp_hdr->flags = login->response_flags;
resp_hdr->max_version = login->version_max;
resp_hdr->active_version = login->version_active;
resp_hdr->hlength = 0;
hton24(resp_hdr->dlength, login->data_length);
memcpy(resp_hdr->isid, &login->isid_lo, 6);
resp_hdr->tsih = cpu_to_be16(login->tsih);
resp_hdr->itt = task->hdr->itt;
resp_hdr->statsn = cpu_to_be32(login->stat_sn);
resp_hdr->exp_cmdsn = cpu_to_be32(login->exp_cmd_sn);
resp_hdr->max_cmdsn = cpu_to_be32(login->max_cmd_sn);
resp_hdr->status_class = login->status_class;
resp_hdr->status_detail = login->status_detail;
pld_len = login->data_length;
bnx2i_conn->gen_pdu.resp_wr_ptr =
bnx2i_conn->gen_pdu.resp_buf + pld_len;
pad_len = 0;
if (pld_len & 0x3)
pad_len = 4 - (pld_len % 4);
if (pad_len) {
int i = 0;
for (i = 0; i < pad_len; i++) {
bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
bnx2i_conn->gen_pdu.resp_wr_ptr++;
}
}
__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
bnx2i_conn->gen_pdu.resp_buf,
bnx2i_conn->gen_pdu.resp_wr_ptr - bnx2i_conn->gen_pdu.resp_buf);
done:
spin_unlock(&session->back_lock);
return 0;
}
/**
* bnx2i_process_text_resp - this function handles iscsi text response
* @session: iscsi session pointer
* @bnx2i_conn: iscsi connection pointer
* @cqe: pointer to newly DMA'ed CQE entry for processing
*
* process iSCSI Text Response CQE& complete it to open-iscsi user daemon
*/
static int bnx2i_process_text_resp(struct iscsi_session *session,
struct bnx2i_conn *bnx2i_conn,
struct cqe *cqe)
{
struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
struct iscsi_task *task;
struct bnx2i_text_response *text;
struct iscsi_text_rsp *resp_hdr;
int pld_len;
int pad_len;
text = (struct bnx2i_text_response *) cqe;
spin_lock(&session->back_lock);
task = iscsi_itt_to_task(conn, text->itt & ISCSI_LOGIN_RESPONSE_INDEX);
if (!task)
goto done;
resp_hdr = (struct iscsi_text_rsp *)&bnx2i_conn->gen_pdu.resp_hdr;
memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
resp_hdr->opcode = text->op_code;
resp_hdr->flags = text->response_flags;
resp_hdr->hlength = 0;
hton24(resp_hdr->dlength, text->data_length);
resp_hdr->itt = task->hdr->itt;
resp_hdr->ttt = cpu_to_be32(text->ttt);
resp_hdr->statsn = task->hdr->exp_statsn;
resp_hdr->exp_cmdsn = cpu_to_be32(text->exp_cmd_sn);
resp_hdr->max_cmdsn = cpu_to_be32(text->max_cmd_sn);
pld_len = text->data_length;
bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf +
pld_len;
pad_len = 0;
if (pld_len & 0x3)
pad_len = 4 - (pld_len % 4);
if (pad_len) {
int i = 0;
for (i = 0; i < pad_len; i++) {
bnx2i_conn->gen_pdu.resp_wr_ptr[0] = 0;
bnx2i_conn->gen_pdu.resp_wr_ptr++;
}
}
__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr,
bnx2i_conn->gen_pdu.resp_buf,
bnx2i_conn->gen_pdu.resp_wr_ptr -
bnx2i_conn->gen_pdu.resp_buf);
done:
spin_unlock(&session->back_lock);
return 0;
}
/**
* bnx2i_process_tmf_resp - this function handles iscsi TMF response
* @session: iscsi session pointer
* @bnx2i_conn: iscsi connection pointer
* @cqe: pointer to newly DMA'ed CQE entry for processing
*
* process iSCSI TMF Response CQE and wake up the driver eh thread.
*/
static int bnx2i_process_tmf_resp(struct iscsi_session *session,
struct bnx2i_conn *bnx2i_conn,
struct cqe *cqe)
{
struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
struct iscsi_task *task;
struct bnx2i_tmf_response *tmf_cqe;
struct iscsi_tm_rsp *resp_hdr;
tmf_cqe = (struct bnx2i_tmf_response *)cqe;
spin_lock(&session->back_lock);
task = iscsi_itt_to_task(conn,
tmf_cqe->itt & ISCSI_TMF_RESPONSE_INDEX);
if (!task)
goto done;
resp_hdr = (struct iscsi_tm_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
resp_hdr->opcode = tmf_cqe->op_code;
resp_hdr->max_cmdsn = cpu_to_be32(tmf_cqe->max_cmd_sn);
resp_hdr->exp_cmdsn = cpu_to_be32(tmf_cqe->exp_cmd_sn);
resp_hdr->itt = task->hdr->itt;
resp_hdr->response = tmf_cqe->response;
__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
done:
spin_unlock(&session->back_lock);
return 0;
}
/**
* bnx2i_process_logout_resp - this function handles iscsi logout response
* @session: iscsi session pointer
* @bnx2i_conn: iscsi connection pointer
* @cqe: pointer to newly DMA'ed CQE entry for processing
*
* process iSCSI Logout Response CQE & make function call to
* notify the user daemon.
*/
static int bnx2i_process_logout_resp(struct iscsi_session *session,
struct bnx2i_conn *bnx2i_conn,
struct cqe *cqe)
{
struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
struct iscsi_task *task;
struct bnx2i_logout_response *logout;
struct iscsi_logout_rsp *resp_hdr;
logout = (struct bnx2i_logout_response *) cqe;
spin_lock(&session->back_lock);
task = iscsi_itt_to_task(conn,
logout->itt & ISCSI_LOGOUT_RESPONSE_INDEX);
if (!task)
goto done;
resp_hdr = (struct iscsi_logout_rsp *) &bnx2i_conn->gen_pdu.resp_hdr;
memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
resp_hdr->opcode = logout->op_code;
resp_hdr->flags = logout->response;
resp_hdr->hlength = 0;
resp_hdr->itt = task->hdr->itt;
resp_hdr->statsn = task->hdr->exp_statsn;
resp_hdr->exp_cmdsn = cpu_to_be32(logout->exp_cmd_sn);
resp_hdr->max_cmdsn = cpu_to_be32(logout->max_cmd_sn);
resp_hdr->t2wait = cpu_to_be32(logout->time_to_wait);
resp_hdr->t2retain = cpu_to_be32(logout->time_to_retain);
__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
bnx2i_conn->ep->state = EP_STATE_LOGOUT_RESP_RCVD;
done:
spin_unlock(&session->back_lock);
return 0;
}
/**
* bnx2i_process_nopin_local_cmpl - this function handles iscsi nopin CQE
* @session: iscsi session pointer
* @bnx2i_conn: iscsi connection pointer
* @cqe: pointer to newly DMA'ed CQE entry for processing
*
* process iSCSI NOPIN local completion CQE, frees IIT and command structures
*/
static void bnx2i_process_nopin_local_cmpl(struct iscsi_session *session,
struct bnx2i_conn *bnx2i_conn,
struct cqe *cqe)
{
struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
struct bnx2i_nop_in_msg *nop_in;
struct iscsi_task *task;
nop_in = (struct bnx2i_nop_in_msg *)cqe;
spin_lock(&session->back_lock);
task = iscsi_itt_to_task(conn,
nop_in->itt & ISCSI_NOP_IN_MSG_INDEX);
if (task)
__iscsi_put_task(task);
spin_unlock(&session->back_lock);
}
/**
* bnx2i_unsol_pdu_adjust_rq - makes adjustments to RQ after unsol pdu is recvd
* @conn: iscsi connection
*
* Firmware advances RQ producer index for every unsolicited PDU even if
* payload data length is '0'. This function makes corresponding
* adjustments on the driver side to match this f/w behavior
*/
static void bnx2i_unsol_pdu_adjust_rq(struct bnx2i_conn *bnx2i_conn)
{
char dummy_rq_data[2];
bnx2i_get_rq_buf(bnx2i_conn, dummy_rq_data, 1);
bnx2i_put_rq_buf(bnx2i_conn, 1);
}
/**
* bnx2i_process_nopin_mesg - this function handles iscsi nopin CQE
* @session: iscsi session pointer
* @bnx2i_conn: iscsi connection pointer
* @cqe: pointer to newly DMA'ed CQE entry for processing
*
* process iSCSI target's proactive iSCSI NOPIN request
*/
static int bnx2i_process_nopin_mesg(struct iscsi_session *session,
struct bnx2i_conn *bnx2i_conn,
struct cqe *cqe)
{
struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
struct iscsi_task *task;
struct bnx2i_nop_in_msg *nop_in;
struct iscsi_nopin *hdr;
int tgt_async_nop = 0;
nop_in = (struct bnx2i_nop_in_msg *)cqe;
spin_lock(&session->back_lock);
hdr = (struct iscsi_nopin *)&bnx2i_conn->gen_pdu.resp_hdr;
memset(hdr, 0, sizeof(struct iscsi_hdr));
hdr->opcode = nop_in->op_code;
hdr->max_cmdsn = cpu_to_be32(nop_in->max_cmd_sn);
hdr->exp_cmdsn = cpu_to_be32(nop_in->exp_cmd_sn);
hdr->ttt = cpu_to_be32(nop_in->ttt);
if (nop_in->itt == (u16) RESERVED_ITT) {
bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
hdr->itt = RESERVED_ITT;
tgt_async_nop = 1;
goto done;
}
/* this is a response to one of our nop-outs */
task = iscsi_itt_to_task(conn,
(itt_t) (nop_in->itt & ISCSI_NOP_IN_MSG_INDEX));
if (task) {
hdr->flags = ISCSI_FLAG_CMD_FINAL;
hdr->itt = task->hdr->itt;
hdr->ttt = cpu_to_be32(nop_in->ttt);
memcpy(&hdr->lun, nop_in->lun, 8);
}
done:
__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0);
spin_unlock(&session->back_lock);
return tgt_async_nop;
}
/**
* bnx2i_process_async_mesg - this function handles iscsi async message
* @session: iscsi session pointer
* @bnx2i_conn: iscsi connection pointer
* @cqe: pointer to newly DMA'ed CQE entry for processing
*
* process iSCSI ASYNC Message
*/
static void bnx2i_process_async_mesg(struct iscsi_session *session,
struct bnx2i_conn *bnx2i_conn,
struct cqe *cqe)
{
struct bnx2i_async_msg *async_cqe;
struct iscsi_async *resp_hdr;
u8 async_event;
bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
async_cqe = (struct bnx2i_async_msg *)cqe;
async_event = async_cqe->async_event;
if (async_event == ISCSI_ASYNC_MSG_SCSI_EVENT) {
iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
"async: scsi events not supported\n");
return;
}
spin_lock(&session->back_lock);
resp_hdr = (struct iscsi_async *) &bnx2i_conn->gen_pdu.resp_hdr;
memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
resp_hdr->opcode = async_cqe->op_code;
resp_hdr->flags = 0x80;
memcpy(&resp_hdr->lun, async_cqe->lun, 8);
resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn);
resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn);
resp_hdr->async_event = async_cqe->async_event;
resp_hdr->async_vcode = async_cqe->async_vcode;
resp_hdr->param1 = cpu_to_be16(async_cqe->param1);
resp_hdr->param2 = cpu_to_be16(async_cqe->param2);
resp_hdr->param3 = cpu_to_be16(async_cqe->param3);
__iscsi_complete_pdu(bnx2i_conn->cls_conn->dd_data,
(struct iscsi_hdr *)resp_hdr, NULL, 0);
spin_unlock(&session->back_lock);
}
/**
* bnx2i_process_reject_mesg - process iscsi reject pdu
* @session: iscsi session pointer
* @bnx2i_conn: iscsi connection pointer
* @cqe: pointer to newly DMA'ed CQE entry for processing
*
* process iSCSI REJECT message
*/
static void bnx2i_process_reject_mesg(struct iscsi_session *session,
struct bnx2i_conn *bnx2i_conn,
struct cqe *cqe)
{
struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
struct bnx2i_reject_msg *reject;
struct iscsi_reject *hdr;
reject = (struct bnx2i_reject_msg *) cqe;
if (reject->data_length) {
bnx2i_get_rq_buf(bnx2i_conn, conn->data, reject->data_length);
bnx2i_put_rq_buf(bnx2i_conn, 1);
} else
bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
spin_lock(&session->back_lock);
hdr = (struct iscsi_reject *) &bnx2i_conn->gen_pdu.resp_hdr;
memset(hdr, 0, sizeof(struct iscsi_hdr));
hdr->opcode = reject->op_code;
hdr->reason = reject->reason;
hton24(hdr->dlength, reject->data_length);
hdr->max_cmdsn = cpu_to_be32(reject->max_cmd_sn);
hdr->exp_cmdsn = cpu_to_be32(reject->exp_cmd_sn);
hdr->ffffffff = cpu_to_be32(RESERVED_ITT);
__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, conn->data,
reject->data_length);
spin_unlock(&session->back_lock);
}
/**
* bnx2i_process_cmd_cleanup_resp - process scsi command clean-up completion
* @session: iscsi session pointer
* @bnx2i_conn: iscsi connection pointer
* @cqe: pointer to newly DMA'ed CQE entry for processing
*
* process command cleanup response CQE during conn shutdown or error recovery
*/
static void bnx2i_process_cmd_cleanup_resp(struct iscsi_session *session,
struct bnx2i_conn *bnx2i_conn,
struct cqe *cqe)
{
struct bnx2i_cleanup_response *cmd_clean_rsp;
struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
struct iscsi_task *task;
cmd_clean_rsp = (struct bnx2i_cleanup_response *)cqe;
spin_lock(&session->back_lock);
task = iscsi_itt_to_task(conn,
cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
if (!task)
printk(KERN_ALERT "bnx2i: cmd clean ITT %x not active\n",
cmd_clean_rsp->itt & ISCSI_CLEANUP_RESPONSE_INDEX);
spin_unlock(&session->back_lock);
complete(&bnx2i_conn->cmd_cleanup_cmpl);
}
/**
* bnx2i_percpu_io_thread - thread per cpu for ios
*
* @arg: ptr to bnx2i_percpu_info structure
*/
int bnx2i_percpu_io_thread(void *arg)
{
struct bnx2i_percpu_s *p = arg;
struct bnx2i_work *work, *tmp;
LIST_HEAD(work_list);
set_user_nice(current, MIN_NICE);
while (!kthread_should_stop()) {
spin_lock_bh(&p->p_work_lock);
while (!list_empty(&p->work_list)) {
list_splice_init(&p->work_list, &work_list);
spin_unlock_bh(&p->p_work_lock);
list_for_each_entry_safe(work, tmp, &work_list, list) {
list_del_init(&work->list);
/* work allocated in the bh, freed here */
bnx2i_process_scsi_cmd_resp(work->session,
work->bnx2i_conn,
&work->cqe);
atomic_dec(&work->bnx2i_conn->work_cnt);
kfree(work);
}
spin_lock_bh(&p->p_work_lock);
}
set_current_state(TASK_INTERRUPTIBLE);
spin_unlock_bh(&p->p_work_lock);
schedule();
}
__set_current_state(TASK_RUNNING);
return 0;
}
/**
* bnx2i_queue_scsi_cmd_resp - queue cmd completion to the percpu thread
* @bnx2i_conn: bnx2i connection
*
* this function is called by generic KCQ handler to queue all pending cmd
* completion CQEs
*
* The implementation is to queue the cmd response based on the
* last recorded command for the given connection. The
* cpu_id gets recorded upon task_xmit. No out-of-order completion!
*/
static int bnx2i_queue_scsi_cmd_resp(struct iscsi_session *session,
struct bnx2i_conn *bnx2i_conn,
struct bnx2i_nop_in_msg *cqe)
{
struct bnx2i_work *bnx2i_work = NULL;
struct bnx2i_percpu_s *p = NULL;
struct iscsi_task *task;
struct scsi_cmnd *sc;
int rc = 0;
int cpu;
spin_lock(&session->back_lock);
task = iscsi_itt_to_task(bnx2i_conn->cls_conn->dd_data,
cqe->itt & ISCSI_CMD_RESPONSE_INDEX);
if (!task || !task->sc) {
spin_unlock(&session->back_lock);
return -EINVAL;
}
sc = task->sc;
if (!blk_rq_cpu_valid(sc->request))
cpu = smp_processor_id();
else
cpu = sc->request->cpu;
spin_unlock(&session->back_lock);
p = &per_cpu(bnx2i_percpu, cpu);
spin_lock(&p->p_work_lock);
if (unlikely(!p->iothread)) {
rc = -EINVAL;
goto err;
}
/* Alloc and copy to the cqe */
bnx2i_work = kzalloc(sizeof(struct bnx2i_work), GFP_ATOMIC);
if (bnx2i_work) {
INIT_LIST_HEAD(&bnx2i_work->list);
bnx2i_work->session = session;
bnx2i_work->bnx2i_conn = bnx2i_conn;
memcpy(&bnx2i_work->cqe, cqe, sizeof(struct cqe));
list_add_tail(&bnx2i_work->list, &p->work_list);
atomic_inc(&bnx2i_conn->work_cnt);
wake_up_process(p->iothread);
spin_unlock(&p->p_work_lock);
goto done;
} else
rc = -ENOMEM;
err:
spin_unlock(&p->p_work_lock);
bnx2i_process_scsi_cmd_resp(session, bnx2i_conn, (struct cqe *)cqe);
done:
return rc;
}
/**
* bnx2i_process_new_cqes - process newly DMA'ed CQE's
* @bnx2i_conn: bnx2i connection
*
* this function is called by generic KCQ handler to process all pending CQE's
*/
static int bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn)
{
struct iscsi_conn *conn = bnx2i_conn->cls_conn->dd_data;
struct iscsi_session *session = conn->session;
struct bnx2i_hba *hba = bnx2i_conn->hba;
struct qp_info *qp;
struct bnx2i_nop_in_msg *nopin;
int tgt_async_msg;
int cqe_cnt = 0;
if (bnx2i_conn->ep == NULL)
return 0;
qp = &bnx2i_conn->ep->qp;
if (!qp->cq_virt) {
printk(KERN_ALERT "bnx2i (%s): cq resr freed in bh execution!",
hba->netdev->name);
goto out;
}
while (1) {
nopin = (struct bnx2i_nop_in_msg *) qp->cq_cons_qe;
if (nopin->cq_req_sn != qp->cqe_exp_seq_sn)
break;
if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx))) {
if (nopin->op_code == ISCSI_OP_NOOP_IN &&
nopin->itt == (u16) RESERVED_ITT) {
printk(KERN_ALERT "bnx2i: Unsolicited "
"NOP-In detected for suspended "
"connection dev=%s!\n",
hba->netdev->name);
bnx2i_unsol_pdu_adjust_rq(bnx2i_conn);
goto cqe_out;
}
break;
}
tgt_async_msg = 0;
switch (nopin->op_code) {
case ISCSI_OP_SCSI_CMD_RSP:
case ISCSI_OP_SCSI_DATA_IN:
/* Run the kthread engine only for data cmds
All other cmds will be completed in this bh! */
bnx2i_queue_scsi_cmd_resp(session, bnx2i_conn, nopin);
goto done;
case ISCSI_OP_LOGIN_RSP:
bnx2i_process_login_resp(session, bnx2i_conn,
qp->cq_cons_qe);
break;
case ISCSI_OP_SCSI_TMFUNC_RSP:
bnx2i_process_tmf_resp(session, bnx2i_conn,
qp->cq_cons_qe);
break;
case ISCSI_OP_TEXT_RSP:
bnx2i_process_text_resp(session, bnx2i_conn,
qp->cq_cons_qe);
break;
case ISCSI_OP_LOGOUT_RSP:
bnx2i_process_logout_resp(session, bnx2i_conn,
qp->cq_cons_qe);
break;
case ISCSI_OP_NOOP_IN:
if (bnx2i_process_nopin_mesg(session, bnx2i_conn,
qp->cq_cons_qe))
tgt_async_msg = 1;
break;
case ISCSI_OPCODE_NOPOUT_LOCAL_COMPLETION:
bnx2i_process_nopin_local_cmpl(session, bnx2i_conn,
qp->cq_cons_qe);
break;
case ISCSI_OP_ASYNC_EVENT:
bnx2i_process_async_mesg(session, bnx2i_conn,
qp->cq_cons_qe);
tgt_async_msg = 1;
break;
case ISCSI_OP_REJECT:
bnx2i_process_reject_mesg(session, bnx2i_conn,
qp->cq_cons_qe);
break;
case ISCSI_OPCODE_CLEANUP_RESPONSE:
bnx2i_process_cmd_cleanup_resp(session, bnx2i_conn,
qp->cq_cons_qe);
break;
default:
printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
nopin->op_code);
}
ADD_STATS_64(hba, rx_pdus, 1);
ADD_STATS_64(hba, rx_bytes, nopin->data_length);
done:
if (!tgt_async_msg) {
if (!atomic_read(&bnx2i_conn->ep->num_active_cmds))
printk(KERN_ALERT "bnx2i (%s): no active cmd! "
"op 0x%x\n",
hba->netdev->name,
nopin->op_code);
else
atomic_dec(&bnx2i_conn->ep->num_active_cmds);
}
cqe_out:
/* clear out in production version only, till beta keep opcode
* field intact, will be helpful in debugging (context dump)
* nopin->op_code = 0;
*/
cqe_cnt++;
qp->cqe_exp_seq_sn++;
if (qp->cqe_exp_seq_sn == (qp->cqe_size * 2 + 1))
qp->cqe_exp_seq_sn = ISCSI_INITIAL_SN;
if (qp->cq_cons_qe == qp->cq_last_qe) {
qp->cq_cons_qe = qp->cq_first_qe;
qp->cq_cons_idx = 0;
} else {
qp->cq_cons_qe++;
qp->cq_cons_idx++;
}
}
out:
return cqe_cnt;
}
/**
* bnx2i_fastpath_notification - process global event queue (KCQ)
* @hba: adapter structure pointer
* @new_cqe_kcqe: pointer to newly DMA'ed KCQE entry
*
* Fast path event notification handler, KCQ entry carries context id
* of the connection that has 1 or more pending CQ entries
*/
static void bnx2i_fastpath_notification(struct bnx2i_hba *hba,
struct iscsi_kcqe *new_cqe_kcqe)
{
struct bnx2i_conn *bnx2i_conn;
u32 iscsi_cid;
int nxt_idx;
iscsi_cid = new_cqe_kcqe->iscsi_conn_id;
bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
if (!bnx2i_conn) {
printk(KERN_ALERT "cid #%x not valid\n", iscsi_cid);
return;
}
if (!bnx2i_conn->ep) {
printk(KERN_ALERT "cid #%x - ep not bound\n", iscsi_cid);
return;
}
bnx2i_process_new_cqes(bnx2i_conn);
nxt_idx = bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep,
CNIC_ARM_CQE_FP);
if (nxt_idx && nxt_idx == bnx2i_process_new_cqes(bnx2i_conn))
bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE_FP);
}
/**
* bnx2i_process_update_conn_cmpl - process iscsi conn update completion KCQE
* @hba: adapter structure pointer
* @update_kcqe: kcqe pointer
*
* CONN_UPDATE completion handler, this completes iSCSI connection FFP migration
*/
static void bnx2i_process_update_conn_cmpl(struct bnx2i_hba *hba,
struct iscsi_kcqe *update_kcqe)
{
struct bnx2i_conn *conn;
u32 iscsi_cid;
iscsi_cid = update_kcqe->iscsi_conn_id;
conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
if (!conn) {
printk(KERN_ALERT "conn_update: cid %x not valid\n", iscsi_cid);
return;
}
if (!conn->ep) {
printk(KERN_ALERT "cid %x does not have ep bound\n", iscsi_cid);
return;
}
if (update_kcqe->completion_status) {
printk(KERN_ALERT "request failed cid %x\n", iscsi_cid);
conn->ep->state = EP_STATE_ULP_UPDATE_FAILED;
} else
conn->ep->state = EP_STATE_ULP_UPDATE_COMPL;
wake_up_interruptible(&conn->ep->ofld_wait);
}
/**
* bnx2i_recovery_que_add_conn - add connection to recovery queue
* @hba: adapter structure pointer
* @bnx2i_conn: iscsi connection
*
* Add connection to recovery queue and schedule adapter eh worker
*/
static void bnx2i_recovery_que_add_conn(struct bnx2i_hba *hba,
struct bnx2i_conn *bnx2i_conn)
{
iscsi_conn_failure(bnx2i_conn->cls_conn->dd_data,
ISCSI_ERR_CONN_FAILED);
}
/**
* bnx2i_process_tcp_error - process error notification on a given connection
*
* @hba: adapter structure pointer
* @tcp_err: tcp error kcqe pointer
*
* handles tcp level error notifications from FW.
*/
static void bnx2i_process_tcp_error(struct bnx2i_hba *hba,
struct iscsi_kcqe *tcp_err)
{
struct bnx2i_conn *bnx2i_conn;
u32 iscsi_cid;
iscsi_cid = tcp_err->iscsi_conn_id;
bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
if (!bnx2i_conn) {
printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
return;
}
printk(KERN_ALERT "bnx2i - cid 0x%x had TCP errors, error code 0x%x\n",
iscsi_cid, tcp_err->completion_status);
bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
}
/**
* bnx2i_process_iscsi_error - process error notification on a given connection
* @hba: adapter structure pointer
* @iscsi_err: iscsi error kcqe pointer
*
* handles iscsi error notifications from the FW. Firmware based in initial
* handshake classifies iscsi protocol / TCP rfc violation into either
* warning or error indications. If indication is of "Error" type, driver
* will initiate session recovery for that connection/session. For
* "Warning" type indication, driver will put out a system log message
* (there will be only one message for each type for the life of the
* session, this is to avoid un-necessarily overloading the system)
*/
static void bnx2i_process_iscsi_error(struct bnx2i_hba *hba,
struct iscsi_kcqe *iscsi_err)
{
struct bnx2i_conn *bnx2i_conn;
u32 iscsi_cid;
char warn_notice[] = "iscsi_warning";
char error_notice[] = "iscsi_error";
char additional_notice[64];
char *message;
int need_recovery;
u64 err_mask64;
iscsi_cid = iscsi_err->iscsi_conn_id;
bnx2i_conn = bnx2i_get_conn_from_id(hba, iscsi_cid);
if (!bnx2i_conn) {
printk(KERN_ALERT "bnx2i - cid 0x%x not valid\n", iscsi_cid);
return;
}
err_mask64 = (0x1ULL << iscsi_err->completion_status);
if (err_mask64 & iscsi_error_mask) {
need_recovery = 0;
message = warn_notice;
} else {
need_recovery = 1;
message = error_notice;
}
switch (iscsi_err->completion_status) {
case ISCSI_KCQE_COMPLETION_STATUS_HDR_DIG_ERR:
strcpy(additional_notice, "hdr digest err");
break;
case ISCSI_KCQE_COMPLETION_STATUS_DATA_DIG_ERR:
strcpy(additional_notice, "data digest err");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_OPCODE:
strcpy(additional_notice, "wrong opcode rcvd");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_AHS_LEN:
strcpy(additional_notice, "AHS len > 0 rcvd");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ITT:
strcpy(additional_notice, "invalid ITT rcvd");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_STATSN:
strcpy(additional_notice, "wrong StatSN rcvd");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_EXP_DATASN:
strcpy(additional_notice, "wrong DataSN rcvd");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T:
strcpy(additional_notice, "pend R2T violation");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_0:
strcpy(additional_notice, "ERL0, UO");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_1:
strcpy(additional_notice, "ERL0, U1");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_2:
strcpy(additional_notice, "ERL0, U2");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_3:
strcpy(additional_notice, "ERL0, U3");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_4:
strcpy(additional_notice, "ERL0, U4");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_5:
strcpy(additional_notice, "ERL0, U5");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_O_U_6:
strcpy(additional_notice, "ERL0, U6");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_RCV_LEN:
strcpy(additional_notice, "invalid resi len");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_RCV_PDU_LEN:
strcpy(additional_notice, "MRDSL violation");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_F_BIT_ZERO:
strcpy(additional_notice, "F-bit not set");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_NOT_RSRV:
strcpy(additional_notice, "invalid TTT");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATASN:
strcpy(additional_notice, "invalid DataSN");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REMAIN_BURST_LEN:
strcpy(additional_notice, "burst len violation");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_BUFFER_OFF:
strcpy(additional_notice, "buf offset violation");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_LUN:
strcpy(additional_notice, "invalid LUN field");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_R2TSN:
strcpy(additional_notice, "invalid R2TSN field");
break;
#define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0 \
ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0
case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_0:
strcpy(additional_notice, "invalid cmd len1");
break;
#define BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1 \
ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1
case BNX2I_ERR_DESIRED_DATA_TRNS_LEN_1:
strcpy(additional_notice, "invalid cmd len2");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_EXCEED:
strcpy(additional_notice,
"pend r2t exceeds MaxOutstandingR2T value");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_TTT_IS_RSRV:
strcpy(additional_notice, "TTT is rsvd");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_MAX_BURST_LEN:
strcpy(additional_notice, "MBL violation");
break;
#define BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO \
ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_DATA_SEG_LEN_NOT_ZERO
case BNX2I_ERR_DATA_SEG_LEN_NOT_ZERO:
strcpy(additional_notice, "data seg len != 0");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_REJECT_PDU_LEN:
strcpy(additional_notice, "reject pdu len error");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_ASYNC_PDU_LEN:
strcpy(additional_notice, "async pdu len error");
break;
case ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_NOPIN_PDU_LEN:
strcpy(additional_notice, "nopin pdu len error");
break;
#define BNX2_ERR_PEND_R2T_IN_CLEANUP \
ISCSI_KCQE_COMPLETION_STATUS_PROTOCOL_ERR_PEND_R2T_IN_CLEANUP
case BNX2_ERR_PEND_R2T_IN_CLEANUP:
strcpy(additional_notice, "pend r2t in cleanup");
break;
case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_FRAGMENT:
strcpy(additional_notice, "IP fragments rcvd");
break;
case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_IP_OPTIONS:
strcpy(additional_notice, "IP options error");
break;
case ISCI_KCQE_COMPLETION_STATUS_TCP_ERROR_URGENT_FLAG:
strcpy(additional_notice, "urgent flag error");
break;
default:
printk(KERN_ALERT "iscsi_err - unknown err %x\n",
iscsi_err->completion_status);
}
if (need_recovery) {
iscsi_conn_printk(KERN_ALERT,
bnx2i_conn->cls_conn->dd_data,
"bnx2i: %s - %s\n",
message, additional_notice);
iscsi_conn_printk(KERN_ALERT,
bnx2i_conn->cls_conn->dd_data,
"conn_err - hostno %d conn %p, "
"iscsi_cid %x cid %x\n",
bnx2i_conn->hba->shost->host_no,
bnx2i_conn, bnx2i_conn->ep->ep_iscsi_cid,
bnx2i_conn->ep->ep_cid);
bnx2i_recovery_que_add_conn(bnx2i_conn->hba, bnx2i_conn);
} else
if (!test_and_set_bit(iscsi_err->completion_status,
(void *) &bnx2i_conn->violation_notified))
iscsi_conn_printk(KERN_ALERT,
bnx2i_conn->cls_conn->dd_data,
"bnx2i: %s - %s\n",
message, additional_notice);
}
/**
* bnx2i_process_conn_destroy_cmpl - process iscsi conn destroy completion
* @hba: adapter structure pointer
* @conn_destroy: conn destroy kcqe pointer
*
* handles connection destroy completion request.
*/
static void bnx2i_process_conn_destroy_cmpl(struct bnx2i_hba *hba,
struct iscsi_kcqe *conn_destroy)
{
struct bnx2i_endpoint *ep;
ep = bnx2i_find_ep_in_destroy_list(hba, conn_destroy->iscsi_conn_id);
if (!ep) {
printk(KERN_ALERT "bnx2i_conn_destroy_cmpl: no pending "
"offload request, unexpected complection\n");
return;
}
if (hba != ep->hba) {
printk(KERN_ALERT "conn destroy- error hba mis-match\n");
return;
}
if (conn_destroy->completion_status) {
printk(KERN_ALERT "conn_destroy_cmpl: op failed\n");
ep->state = EP_STATE_CLEANUP_FAILED;
} else
ep->state = EP_STATE_CLEANUP_CMPL;
wake_up_interruptible(&ep->ofld_wait);
}
/**
* bnx2i_process_ofld_cmpl - process initial iscsi conn offload completion
* @hba: adapter structure pointer
* @ofld_kcqe: conn offload kcqe pointer
*
* handles initial connection offload completion, ep_connect() thread is
* woken-up to continue with LLP connect process
*/
static void bnx2i_process_ofld_cmpl(struct bnx2i_hba *hba,
struct iscsi_kcqe *ofld_kcqe)
{
u32 cid_addr;
struct bnx2i_endpoint *ep;
u32 cid_num;
ep = bnx2i_find_ep_in_ofld_list(hba, ofld_kcqe->iscsi_conn_id);
if (!ep) {
printk(KERN_ALERT "ofld_cmpl: no pend offload request\n");
return;
}
if (hba != ep->hba) {
printk(KERN_ALERT "ofld_cmpl: error hba mis-match\n");
return;
}
if (ofld_kcqe->completion_status) {
ep->state = EP_STATE_OFLD_FAILED;
if (ofld_kcqe->completion_status ==
ISCSI_KCQE_COMPLETION_STATUS_CTX_ALLOC_FAILURE)
printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - unable "
"to allocate iSCSI context resources\n",
hba->netdev->name);
else if (ofld_kcqe->completion_status ==
ISCSI_KCQE_COMPLETION_STATUS_INVALID_OPCODE)
printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
"opcode\n", hba->netdev->name);
else if (ofld_kcqe->completion_status ==
ISCSI_KCQE_COMPLETION_STATUS_CID_BUSY)
/* error status code valid only for 5771x chipset */
ep->state = EP_STATE_OFLD_FAILED_CID_BUSY;
else
printk(KERN_ALERT "bnx2i (%s): ofld1 cmpl - invalid "
"error code %d\n", hba->netdev->name,
ofld_kcqe->completion_status);
} else {
ep->state = EP_STATE_OFLD_COMPL;
cid_addr = ofld_kcqe->iscsi_conn_context_id;
cid_num = bnx2i_get_cid_num(ep);
ep->ep_cid = cid_addr;
ep->qp.ctx_base = NULL;
}
wake_up_interruptible(&ep->ofld_wait);
}
/**
* bnx2i_indicate_kcqe - process iscsi conn update completion KCQE
* @hba: adapter structure pointer
* @update_kcqe: kcqe pointer
*
* Generic KCQ event handler/dispatcher
*/
static void bnx2i_indicate_kcqe(void *context, struct kcqe *kcqe[],
u32 num_cqe)
{
struct bnx2i_hba *hba = context;
int i = 0;
struct iscsi_kcqe *ikcqe = NULL;
while (i < num_cqe) {
ikcqe = (struct iscsi_kcqe *) kcqe[i++];
if (ikcqe->op_code ==
ISCSI_KCQE_OPCODE_CQ_EVENT_NOTIFICATION)
bnx2i_fastpath_notification(hba, ikcqe);
else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_OFFLOAD_CONN)
bnx2i_process_ofld_cmpl(hba, ikcqe);
else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_UPDATE_CONN)
bnx2i_process_update_conn_cmpl(hba, ikcqe);
else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_INIT) {
if (ikcqe->completion_status !=
ISCSI_KCQE_COMPLETION_STATUS_SUCCESS)
bnx2i_iscsi_license_error(hba, ikcqe->\
completion_status);
else {
set_bit(ADAPTER_STATE_UP, &hba->adapter_state);
bnx2i_get_link_state(hba);
printk(KERN_INFO "bnx2i [%.2x:%.2x.%.2x]: "
"ISCSI_INIT passed\n",
(u8)hba->pcidev->bus->number,
hba->pci_devno,
(u8)hba->pci_func);
}
} else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_DESTROY_CONN)
bnx2i_process_conn_destroy_cmpl(hba, ikcqe);
else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_ISCSI_ERROR)
bnx2i_process_iscsi_error(hba, ikcqe);
else if (ikcqe->op_code == ISCSI_KCQE_OPCODE_TCP_ERROR)
bnx2i_process_tcp_error(hba, ikcqe);
else
printk(KERN_ALERT "bnx2i: unknown opcode 0x%x\n",
ikcqe->op_code);
}
}
/**
* bnx2i_indicate_netevent - Generic netdev event handler
* @context: adapter structure pointer
* @event: event type
* @vlan_id: vlans id - associated vlan id with this event
*
* Handles four netdev events, NETDEV_UP, NETDEV_DOWN,
* NETDEV_GOING_DOWN and NETDEV_CHANGE
*/
static void bnx2i_indicate_netevent(void *context, unsigned long event,
u16 vlan_id)
{
struct bnx2i_hba *hba = context;
/* Ignore all netevent coming from vlans */
if (vlan_id != 0)
return;
switch (event) {
case NETDEV_UP:
if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
bnx2i_send_fw_iscsi_init_msg(hba);
break;
case NETDEV_DOWN:
clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
break;
case NETDEV_GOING_DOWN:
set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
iscsi_host_for_each_session(hba->shost,
bnx2i_drop_session);
break;
case NETDEV_CHANGE:
bnx2i_get_link_state(hba);
break;
default:
;
}
}
/**
* bnx2i_cm_connect_cmpl - process iscsi conn establishment completion
* @cm_sk: cnic sock structure pointer
*
* function callback exported via bnx2i - cnic driver interface to
* indicate completion of option-2 TCP connect request.
*/
static void bnx2i_cm_connect_cmpl(struct cnic_sock *cm_sk)
{
struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state))
ep->state = EP_STATE_CONNECT_FAILED;
else if (test_bit(SK_F_OFFLD_COMPLETE, &cm_sk->flags))
ep->state = EP_STATE_CONNECT_COMPL;
else
ep->state = EP_STATE_CONNECT_FAILED;
wake_up_interruptible(&ep->ofld_wait);
}
/**
* bnx2i_cm_close_cmpl - process tcp conn close completion
* @cm_sk: cnic sock structure pointer
*
* function callback exported via bnx2i - cnic driver interface to
* indicate completion of option-2 graceful TCP connect shutdown
*/
static void bnx2i_cm_close_cmpl(struct cnic_sock *cm_sk)
{
struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
ep->state = EP_STATE_DISCONN_COMPL;
wake_up_interruptible(&ep->ofld_wait);
}
/**
* bnx2i_cm_abort_cmpl - process abortive tcp conn teardown completion
* @cm_sk: cnic sock structure pointer
*
* function callback exported via bnx2i - cnic driver interface to
* indicate completion of option-2 abortive TCP connect termination
*/
static void bnx2i_cm_abort_cmpl(struct cnic_sock *cm_sk)
{
struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
ep->state = EP_STATE_DISCONN_COMPL;
wake_up_interruptible(&ep->ofld_wait);
}
/**
* bnx2i_cm_remote_close - process received TCP FIN
* @hba: adapter structure pointer
* @update_kcqe: kcqe pointer
*
* function callback exported via bnx2i - cnic driver interface to indicate
* async TCP events such as FIN
*/
static void bnx2i_cm_remote_close(struct cnic_sock *cm_sk)
{
struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
ep->state = EP_STATE_TCP_FIN_RCVD;
if (ep->conn)
bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
}
/**
* bnx2i_cm_remote_abort - process TCP RST and start conn cleanup
* @hba: adapter structure pointer
* @update_kcqe: kcqe pointer
*
* function callback exported via bnx2i - cnic driver interface to
* indicate async TCP events (RST) sent by the peer.
*/
static void bnx2i_cm_remote_abort(struct cnic_sock *cm_sk)
{
struct bnx2i_endpoint *ep = (struct bnx2i_endpoint *) cm_sk->context;
u32 old_state = ep->state;
ep->state = EP_STATE_TCP_RST_RCVD;
if (old_state == EP_STATE_DISCONN_START)
wake_up_interruptible(&ep->ofld_wait);
else
if (ep->conn)
bnx2i_recovery_que_add_conn(ep->hba, ep->conn);
}
static int bnx2i_send_nl_mesg(void *context, u32 msg_type,
char *buf, u16 buflen)
{
struct bnx2i_hba *hba = context;
int rc;
if (!hba)
return -ENODEV;
rc = iscsi_offload_mesg(hba->shost, &bnx2i_iscsi_transport,
msg_type, buf, buflen);
if (rc)
printk(KERN_ALERT "bnx2i: private nl message send error\n");
return rc;
}
/**
* bnx2i_cnic_cb - global template of bnx2i - cnic driver interface structure
* carrying callback function pointers
*
*/
struct cnic_ulp_ops bnx2i_cnic_cb = {
.cnic_init = bnx2i_ulp_init,
.cnic_exit = bnx2i_ulp_exit,
.cnic_start = bnx2i_start,
.cnic_stop = bnx2i_stop,
.indicate_kcqes = bnx2i_indicate_kcqe,
.indicate_netevent = bnx2i_indicate_netevent,
.cm_connect_complete = bnx2i_cm_connect_cmpl,
.cm_close_complete = bnx2i_cm_close_cmpl,
.cm_abort_complete = bnx2i_cm_abort_cmpl,
.cm_remote_close = bnx2i_cm_remote_close,
.cm_remote_abort = bnx2i_cm_remote_abort,
.iscsi_nl_send_msg = bnx2i_send_nl_mesg,
.cnic_get_stats = bnx2i_get_stats,
.owner = THIS_MODULE
};
/**
* bnx2i_map_ep_dbell_regs - map connection doorbell registers
* @ep: bnx2i endpoint
*
* maps connection's SQ and RQ doorbell registers, 5706/5708/5709 hosts these
* register in BAR #0. Whereas in 57710 these register are accessed by
* mapping BAR #1
*/
int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep)
{
u32 cid_num;
u32 reg_off;
u32 first_l4l5;
u32 ctx_sz;
u32 config2;
resource_size_t reg_base;
cid_num = bnx2i_get_cid_num(ep);
if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
reg_base = pci_resource_start(ep->hba->pcidev,
BNX2X_DOORBELL_PCI_BAR);
reg_off = (1 << BNX2X_DB_SHIFT) * (cid_num & 0x1FFFF);
ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4);
goto arm_cq;
}
if ((test_bit(BNX2I_NX2_DEV_5709, &ep->hba->cnic_dev_type)) &&
(ep->hba->mail_queue_access == BNX2I_MQ_BIN_MODE)) {
config2 = REG_RD(ep->hba, BNX2_MQ_CONFIG2);
first_l4l5 = config2 & BNX2_MQ_CONFIG2_FIRST_L4L5;
ctx_sz = (config2 & BNX2_MQ_CONFIG2_CONT_SZ) >> 3;
if (ctx_sz)
reg_off = CTX_OFFSET + MAX_CID_CNT * MB_KERNEL_CTX_SIZE
+ BNX2I_570X_PAGE_SIZE_DEFAULT *
(((cid_num - first_l4l5) / ctx_sz) + 256);
else
reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
} else
/* 5709 device in normal node and 5706/5708 devices */
reg_off = CTX_OFFSET + (MB_KERNEL_CTX_SIZE * cid_num);
ep->qp.ctx_base = ioremap_nocache(ep->hba->reg_base + reg_off,
MB_KERNEL_CTX_SIZE);
if (!ep->qp.ctx_base)
return -ENOMEM;
arm_cq:
bnx2i_arm_cq_event_coalescing(ep, CNIC_ARM_CQE);
return 0;
}
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