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linux/drivers/scsi/bnx2i/bnx2i_hwi.c
Eddie Wai 9ae58e144d [SCSI] bnx2i: Optimized the iSCSI offload performance 
Modified the event coalescing code for iSCSI offload to combat both
corner cases and optimize performance as follows:

1. Added mechanism to loop back a second time to process any leftover
CQEs that was generated by the hardware during the time the driver is
busy processing previous CQEs in the bh.  This not only helps the
performance but also fixes the corner case when no more CQEs are being
generated in the pipeline; so those leftover CQEs will get a a chance
to be processed.

2. Added ARM_CQE_FP to distinguish between fast path arming versus
slow path arming.  This change will guarantee that the CQEs will
always get a chance to be re-armed during fast path completions.

3. Removed the inline event coalescing division for perf optimization.
Also fixed a division-by-zero error when the event_coal_div module
param was set to 0.

4. Changed the default SQ WQEs size from 256 to 128 to match chip
default.

5. Changed the cmd_per_lun from 32 to 24.

Signed-off-by: Eddie Wai <eddie.wai@broadcom.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <jbottomley@parallels.com>
2011-05-24 12:41:10 -04:00

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/* bnx2i_hwi.c: Broadcom NetXtreme II iSCSI driver.
*
* Copyright (c) 2006 - 2010 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"
/**
* 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 = 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 = 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 = 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 indentifier) 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
*/
void bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action)
{
struct bnx2i_5771x_cq_db *cq_db;
u16 cq_index;
u16 next_index;
u32 num_active_cmds;
/* Coalesce CQ entries only on 10G devices */
if (!test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type))
return;
/* 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;
if (action == CNIC_ARM_CQE || action == CNIC_ARM_CQE_FP) {
num_active_cmds = ep->num_active_cmds;
if (num_active_cmds <= event_coal_min)
next_index = 1;
else
next_index = event_coal_min +
((num_active_cmds - event_coal_min) >>
ep->ec_shift);
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;
}
}
/**
* 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;
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 *login_hdr;
u32 dword;
bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
login_hdr = (struct iscsi_login *)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 = 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 indentifier) 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 indentifier) 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 indentifier) 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 indentifier) 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 indentifier) 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 / 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 += 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 += PAGE_SIZE;
}
}
/* RQ page table */
memset(ep->qp.rq_pgtbl_virt, 0, ep->qp.rq_pgtbl_size);
num_pages = ep->qp.rq_mem_size / 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 += 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 += PAGE_SIZE;
}
}
/* CQ page table */
memset(ep->qp.cq_pgtbl_virt, 0, ep->qp.cq_pgtbl_size);
num_pages = ep->qp.cq_mem_size / 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 += 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 += PAGE_SIZE;
}
}
}
/**
* bnx2i_alloc_qp_resc - allocates required resources for QP.
* @hba: adapter structure pointer
* @ep: endpoint (transport indentifier) 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 + (PAGE_SIZE - 1)) & PAGE_MASK;
ep->qp.sq_pgtbl_size =
(ep->qp.sq_mem_size / PAGE_SIZE) * sizeof(void *);
ep->qp.sq_pgtbl_size =
(ep->qp.sq_pgtbl_size + (PAGE_SIZE - 1)) & 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 + (PAGE_SIZE - 1)) & PAGE_MASK;
ep->qp.cq_pgtbl_size =
(ep->qp.cq_mem_size / PAGE_SIZE) * sizeof(void *);
ep->qp.cq_pgtbl_size =
(ep->qp.cq_pgtbl_size + (PAGE_SIZE - 1)) & 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 + (PAGE_SIZE - 1)) & PAGE_MASK;
ep->qp.rq_pgtbl_size =
(ep->qp.rq_mem_size / PAGE_SIZE) * sizeof(void *);
ep->qp.rq_pgtbl_size =
(ep->qp.rq_pgtbl_size + (PAGE_SIZE - 1)) & 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 indentifier) 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;
bnx2i_adjust_qp_size(hba);
iscsi_init.flags =
ISCSI_PAGE_SIZE_4K << 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 = 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(PAGE_SIZE / BNX2I_CQE_SIZE);
iscsi_init.cq_num_wqes = hba->max_cqes;
iscsi_init.cq_num_pages = (hba->max_cqes * BNX2I_CQE_SIZE +
(PAGE_SIZE - 1)) / PAGE_SIZE;
iscsi_init.sq_num_pages = (hba->max_sqes * BNX2I_SQ_WQE_SIZE +
(PAGE_SIZE - 1)) / 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;
else
iscsi_init2.error_bit_map[0] = (u32) mask64;
if (error_mask2)
iscsi_init2.error_bit_map[1] = error_mask2;
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.
* @conn: iscsi connection
* @cqe: pointer to newly DMA'ed CQE entry for processing
*
* process SCSI CMD Response CQE & complete the request to SCSI-ML
*/
static 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_cmd_response *resp_cqe;
struct bnx2i_cmd *bnx2i_cmd;
struct iscsi_task *task;
struct iscsi_cmd_rsp *hdr;
u32 datalen = 0;
resp_cqe = (struct bnx2i_cmd_response *)cqe;
spin_lock(&session->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_outs;
conn->rxdata_octets +=
bnx2i_cmd->req.total_data_transfer_length;
} else {
conn->dataout_pdus_cnt +=
resp_cqe->task_stat.read_stat.num_data_outs;
conn->r2t_pdus_cnt +=
resp_cqe->task_stat.read_stat.num_r2ts;
conn->txdata_octets +=
bnx2i_cmd->req.total_data_transfer_length;
}
bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);
hdr = (struct iscsi_cmd_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(&session->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->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->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->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->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->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->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->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->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->lock);
task = iscsi_itt_to_task(conn,
nop_in->itt & ISCSI_NOP_IN_MSG_INDEX);
if (task)
__iscsi_put_task(task);
spin_unlock(&session->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->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->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->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->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->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->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->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->lock);
complete(&bnx2i_conn->cmd_cleanup_cmpl);
}
/**
* bnx2i_process_new_cqes - process newly DMA'ed CQE's
* @bnx2i_conn: iscsi connection
*
* this function is called by generic KCQ handler to process all pending CQE's
*/
static void 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 qp_info *qp = &bnx2i_conn->ep->qp;
struct bnx2i_nop_in_msg *nopin;
int tgt_async_msg;
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",
bnx2i_conn->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:
bnx2i_process_scsi_cmd_resp(session, bnx2i_conn,
qp->cq_cons_qe);
break;
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);
}
if (!tgt_async_msg)
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;
*/
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++;
}
}
}
/**
* 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;
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);
bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE_FP);
bnx2i_process_new_cqes(bnx2i_conn);
}
/**
* 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
*
* Handles four netdev events, NETDEV_UP, NETDEV_DOWN,
* NETDEV_GOING_DOWN and NETDEV_CHANGE
*/
static void bnx2i_indicate_netevent(void *context, unsigned long event)
{
struct bnx2i_hba *hba = context;
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,
.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 = BNX2I_5771X_DBELL_PAGE_SIZE * (cid_num & 0x1FFFF) +
DPM_TRIGER_TYPE;
ep->qp.ctx_base = ioremap_nocache(reg_base + reg_off, 4);
goto arm_cq;
}
reg_base = ep->hba->netdev->base_addr;
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(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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