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[SCSI] bnx2fc: REC/SRR link service request and response handling 

Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Bhanu Prakash Gollapudi 2011-07-27 11:32:06 -07:00 committed by James Bottomley
parent 6c5a7ce4f1
commit 7444695429
3 changed files with 422 additions and 18 deletions
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12
drivers/scsi/bnx2fc/bnx2fc.h
View File

@ -141,6 +141,9 @@
#define BNX2FC_RNID_HBA 0x7
#define SRR_RETRY_COUNT 5
#define REC_RETRY_COUNT 1
/* bnx2fc driver uses only one instance of fcoe_percpu_s */
extern struct fcoe_percpu_s bnx2fc_global;
@ -386,6 +389,7 @@ struct bnx2fc_cmd {
struct completion tm_done;
int wait_for_comp;
u16 xid;
struct fcoe_err_report_entry err_entry;
struct fcoe_task_ctx_entry *task;
struct io_bdt *bd_tbl;
struct fcp_rsp *rsp;
@ -402,6 +406,12 @@ struct bnx2fc_cmd {
#define BNX2FC_FLAG_IO_COMPL 0x9
#define BNX2FC_FLAG_ELS_DONE 0xa
#define BNX2FC_FLAG_ELS_TIMEOUT 0xb
#define BNX2FC_FLAG_CMD_LOST 0xc
#define BNX2FC_FLAG_SRR_SENT 0xd
u8 rec_retry;
u8 srr_retry;
u32 srr_offset;
u8 srr_rctl;
u32 fcp_resid;
u32 fcp_rsp_len;
u32 fcp_sns_len;
@ -432,6 +442,7 @@ struct bnx2fc_unsol_els {
struct bnx2fc_cmd *bnx2fc_cmd_alloc(struct bnx2fc_rport *tgt);
struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type);
void bnx2fc_cmd_release(struct kref *ref);
int bnx2fc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *sc_cmd);
@ -522,6 +533,7 @@ void bnx2fc_process_l2_frame_compl(struct bnx2fc_rport *tgt,
unsigned char *buf,
u32 frame_len, u16 l2_oxid);
int bnx2fc_send_stat_req(struct bnx2fc_hba *hba);
int bnx2fc_post_io_req(struct bnx2fc_rport *tgt, struct bnx2fc_cmd *io_req);
int bnx2fc_send_rec(struct bnx2fc_cmd *orig_io_req);
int bnx2fc_send_srr(struct bnx2fc_cmd *orig_io_req, u32 offset, u8 r_ctl);
void bnx2fc_process_seq_cleanup_compl(struct bnx2fc_cmd *seq_clnup_req,

419
drivers/scsi/bnx2fc/bnx2fc_els.c
View File

@ -253,26 +253,410 @@ int bnx2fc_send_rls(struct bnx2fc_rport *tgt, struct fc_frame *fp)
return rc;
}
void bnx2fc_srr_compl(struct bnx2fc_els_cb_arg *cb_arg)
{
struct bnx2fc_mp_req *mp_req;
struct fc_frame_header *fc_hdr, *fh;
struct bnx2fc_cmd *srr_req;
struct bnx2fc_cmd *orig_io_req;
struct fc_frame *fp;
unsigned char *buf;
void *resp_buf;
u32 resp_len, hdr_len;
u8 opcode;
int rc = 0;
orig_io_req = cb_arg->aborted_io_req;
srr_req = cb_arg->io_req;
if (test_bit(BNX2FC_FLAG_IO_COMPL, &orig_io_req->req_flags)) {
BNX2FC_IO_DBG(srr_req, "srr_compl: xid - 0x%x completed",
orig_io_req->xid);
goto srr_compl_done;
}
if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &orig_io_req->req_flags)) {
BNX2FC_IO_DBG(srr_req, "rec abts in prog "
"orig_io - 0x%x\n",
orig_io_req->xid);
goto srr_compl_done;
}
if (test_and_clear_bit(BNX2FC_FLAG_ELS_TIMEOUT, &srr_req->req_flags)) {
/* SRR timedout */
BNX2FC_IO_DBG(srr_req, "srr timed out, abort "
"orig_io - 0x%x\n",
orig_io_req->xid);
rc = bnx2fc_initiate_abts(srr_req);
if (rc != SUCCESS) {
BNX2FC_IO_DBG(srr_req, "srr_compl: initiate_abts "
"failed. issue cleanup\n");
bnx2fc_initiate_cleanup(srr_req);
}
orig_io_req->srr_retry++;
if (orig_io_req->srr_retry <= SRR_RETRY_COUNT) {
struct bnx2fc_rport *tgt = orig_io_req->tgt;
spin_unlock_bh(&tgt->tgt_lock);
rc = bnx2fc_send_srr(orig_io_req,
orig_io_req->srr_offset,
orig_io_req->srr_rctl);
spin_lock_bh(&tgt->tgt_lock);
if (!rc)
goto srr_compl_done;
}
rc = bnx2fc_initiate_abts(orig_io_req);
if (rc != SUCCESS) {
BNX2FC_IO_DBG(srr_req, "srr_compl: initiate_abts "
"failed xid = 0x%x. issue cleanup\n",
orig_io_req->xid);
bnx2fc_initiate_cleanup(orig_io_req);
}
goto srr_compl_done;
}
mp_req = &(srr_req->mp_req);
fc_hdr = &(mp_req->resp_fc_hdr);
resp_len = mp_req->resp_len;
resp_buf = mp_req->resp_buf;
hdr_len = sizeof(*fc_hdr);
buf = kzalloc(PAGE_SIZE, GFP_ATOMIC);
if (!buf) {
printk(KERN_ERR PFX "srr buf: mem alloc failure\n");
goto srr_compl_done;
}
memcpy(buf, fc_hdr, hdr_len);
memcpy(buf + hdr_len, resp_buf, resp_len);
fp = fc_frame_alloc(NULL, resp_len);
if (!fp) {
printk(KERN_ERR PFX "fc_frame_alloc failure\n");
goto free_buf;
}
fh = (struct fc_frame_header *) fc_frame_header_get(fp);
/* Copy FC Frame header and payload into the frame */
memcpy(fh, buf, hdr_len + resp_len);
opcode = fc_frame_payload_op(fp);
switch (opcode) {
case ELS_LS_ACC:
BNX2FC_IO_DBG(srr_req, "SRR success\n");
break;
case ELS_LS_RJT:
BNX2FC_IO_DBG(srr_req, "SRR rejected\n");
rc = bnx2fc_initiate_abts(orig_io_req);
if (rc != SUCCESS) {
BNX2FC_IO_DBG(srr_req, "srr_compl: initiate_abts "
"failed xid = 0x%x. issue cleanup\n",
orig_io_req->xid);
bnx2fc_initiate_cleanup(orig_io_req);
}
break;
default:
BNX2FC_IO_DBG(srr_req, "srr compl - invalid opcode = %d\n",
opcode);
break;
}
fc_frame_free(fp);
free_buf:
kfree(buf);
srr_compl_done:
kref_put(&orig_io_req->refcount, bnx2fc_cmd_release);
}
void bnx2fc_rec_compl(struct bnx2fc_els_cb_arg *cb_arg)
{
struct bnx2fc_cmd *orig_io_req, *new_io_req;
struct bnx2fc_cmd *rec_req;
struct bnx2fc_mp_req *mp_req;
struct fc_frame_header *fc_hdr, *fh;
struct fc_els_ls_rjt *rjt;
struct fc_els_rec_acc *acc;
struct bnx2fc_rport *tgt;
struct fcoe_err_report_entry *err_entry;
struct scsi_cmnd *sc_cmd;
enum fc_rctl r_ctl;
unsigned char *buf;
void *resp_buf;
struct fc_frame *fp;
u8 opcode;
u32 offset;
u32 e_stat;
u32 resp_len, hdr_len;
int rc = 0;
bool send_seq_clnp = false;
bool abort_io = false;
BNX2FC_MISC_DBG("Entered rec_compl callback\n");
rec_req = cb_arg->io_req;
orig_io_req = cb_arg->aborted_io_req;
BNX2FC_IO_DBG(rec_req, "rec_compl: orig xid = 0x%x", orig_io_req->xid);
tgt = orig_io_req->tgt;
if (test_bit(BNX2FC_FLAG_IO_COMPL, &orig_io_req->req_flags)) {
BNX2FC_IO_DBG(rec_req, "completed"
"orig_io - 0x%x\n",
orig_io_req->xid);
goto rec_compl_done;
}
if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &orig_io_req->req_flags)) {
BNX2FC_IO_DBG(rec_req, "abts in prog "
"orig_io - 0x%x\n",
orig_io_req->xid);
goto rec_compl_done;
}
/* Handle REC timeout case */
if (test_and_clear_bit(BNX2FC_FLAG_ELS_TIMEOUT, &rec_req->req_flags)) {
BNX2FC_IO_DBG(rec_req, "timed out, abort "
"orig_io - 0x%x\n",
orig_io_req->xid);
/* els req is timed out. send abts for els */
rc = bnx2fc_initiate_abts(rec_req);
if (rc != SUCCESS) {
BNX2FC_IO_DBG(rec_req, "rec_compl: initiate_abts "
"failed. issue cleanup\n");
bnx2fc_initiate_cleanup(rec_req);
}
orig_io_req->rec_retry++;
/* REC timedout. send ABTS to the orig IO req */
if (orig_io_req->rec_retry <= REC_RETRY_COUNT) {
spin_unlock_bh(&tgt->tgt_lock);
rc = bnx2fc_send_rec(orig_io_req);
spin_lock_bh(&tgt->tgt_lock);
if (!rc)
goto rec_compl_done;
}
rc = bnx2fc_initiate_abts(orig_io_req);
if (rc != SUCCESS) {
BNX2FC_IO_DBG(rec_req, "rec_compl: initiate_abts "
"failed xid = 0x%x. issue cleanup\n",
orig_io_req->xid);
bnx2fc_initiate_cleanup(orig_io_req);
}
goto rec_compl_done;
}
mp_req = &(rec_req->mp_req);
fc_hdr = &(mp_req->resp_fc_hdr);
resp_len = mp_req->resp_len;
acc = resp_buf = mp_req->resp_buf;
hdr_len = sizeof(*fc_hdr);
buf = kzalloc(PAGE_SIZE, GFP_ATOMIC);
if (!buf) {
printk(KERN_ERR PFX "rec buf: mem alloc failure\n");
goto rec_compl_done;
}
memcpy(buf, fc_hdr, hdr_len);
memcpy(buf + hdr_len, resp_buf, resp_len);
fp = fc_frame_alloc(NULL, resp_len);
if (!fp) {
printk(KERN_ERR PFX "fc_frame_alloc failure\n");
goto free_buf;
}
fh = (struct fc_frame_header *) fc_frame_header_get(fp);
/* Copy FC Frame header and payload into the frame */
memcpy(fh, buf, hdr_len + resp_len);
opcode = fc_frame_payload_op(fp);
if (opcode == ELS_LS_RJT) {
BNX2FC_IO_DBG(rec_req, "opcode is RJT\n");
rjt = fc_frame_payload_get(fp, sizeof(*rjt));
if ((rjt->er_reason == ELS_RJT_LOGIC ||
rjt->er_reason == ELS_RJT_UNAB) &&
rjt->er_explan == ELS_EXPL_OXID_RXID) {
BNX2FC_IO_DBG(rec_req, "handle CMD LOST case\n");
new_io_req = bnx2fc_cmd_alloc(tgt);
if (!new_io_req)
goto abort_io;
new_io_req->sc_cmd = orig_io_req->sc_cmd;
/* cleanup orig_io_req that is with the FW */
set_bit(BNX2FC_FLAG_CMD_LOST,
&orig_io_req->req_flags);
bnx2fc_initiate_cleanup(orig_io_req);
/* Post a new IO req with the same sc_cmd */
BNX2FC_IO_DBG(rec_req, "Post IO request again\n");
spin_unlock_bh(&tgt->tgt_lock);
rc = bnx2fc_post_io_req(tgt, new_io_req);
spin_lock_bh(&tgt->tgt_lock);
if (!rc)
goto free_frame;
BNX2FC_IO_DBG(rec_req, "REC: io post err\n");
}
abort_io:
rc = bnx2fc_initiate_abts(orig_io_req);
if (rc != SUCCESS) {
BNX2FC_IO_DBG(rec_req, "rec_compl: initiate_abts "
"failed. issue cleanup\n");
bnx2fc_initiate_cleanup(orig_io_req);
}
} else if (opcode == ELS_LS_ACC) {
/* REVISIT: Check if the exchange is already aborted */
offset = ntohl(acc->reca_fc4value);
e_stat = ntohl(acc->reca_e_stat);
if (e_stat & ESB_ST_SEQ_INIT) {
BNX2FC_IO_DBG(rec_req, "target has the seq init\n");
goto free_frame;
}
BNX2FC_IO_DBG(rec_req, "e_stat = 0x%x, offset = 0x%x\n",
e_stat, offset);
/* Seq initiative is with us */
err_entry = (struct fcoe_err_report_entry *)
&orig_io_req->err_entry;
sc_cmd = orig_io_req->sc_cmd;
if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) {
/* SCSI WRITE command */
if (offset == orig_io_req->data_xfer_len) {
BNX2FC_IO_DBG(rec_req, "WRITE - resp lost\n");
/* FCP_RSP lost */
r_ctl = FC_RCTL_DD_CMD_STATUS;
offset = 0;
} else {
/* start transmitting from offset */
BNX2FC_IO_DBG(rec_req, "XFER_RDY/DATA lost\n");
send_seq_clnp = true;
r_ctl = FC_RCTL_DD_DATA_DESC;
if (bnx2fc_initiate_seq_cleanup(orig_io_req,
offset, r_ctl))
abort_io = true;
/* XFER_RDY */
}
} else {
/* SCSI READ command */
if (err_entry->data.rx_buf_off ==
orig_io_req->data_xfer_len) {
/* FCP_RSP lost */
BNX2FC_IO_DBG(rec_req, "READ - resp lost\n");
r_ctl = FC_RCTL_DD_CMD_STATUS;
offset = 0;
} else {
/* request retransmission from this offset */
send_seq_clnp = true;
offset = err_entry->data.rx_buf_off;
BNX2FC_IO_DBG(rec_req, "RD DATA lost\n");
/* FCP_DATA lost */
r_ctl = FC_RCTL_DD_SOL_DATA;
if (bnx2fc_initiate_seq_cleanup(orig_io_req,
offset, r_ctl))
abort_io = true;
}
}
if (abort_io) {
rc = bnx2fc_initiate_abts(orig_io_req);
if (rc != SUCCESS) {
BNX2FC_IO_DBG(rec_req, "rec_compl:initiate_abts"
" failed. issue cleanup\n");
bnx2fc_initiate_cleanup(orig_io_req);
}
} else if (!send_seq_clnp) {
BNX2FC_IO_DBG(rec_req, "Send SRR - FCP_RSP\n");
spin_unlock_bh(&tgt->tgt_lock);
rc = bnx2fc_send_srr(orig_io_req, offset, r_ctl);
spin_lock_bh(&tgt->tgt_lock);
if (rc) {
BNX2FC_IO_DBG(rec_req, "Unable to send SRR"
" IO will abort\n");
}
}
}
free_frame:
fc_frame_free(fp);
free_buf:
kfree(buf);
rec_compl_done:
kref_put(&orig_io_req->refcount, bnx2fc_cmd_release);
kfree(cb_arg);
}
int bnx2fc_send_rec(struct bnx2fc_cmd *orig_io_req)
{
/*
* Dummy function to enable compiling individual patches. Real function
* is in the next patch.
*/
return 0;
struct fc_els_rec rec;
struct bnx2fc_rport *tgt = orig_io_req->tgt;
struct fc_lport *lport = tgt->rdata->local_port;
struct bnx2fc_els_cb_arg *cb_arg = NULL;
u32 sid = tgt->sid;
u32 r_a_tov = lport->r_a_tov;
int rc;
BNX2FC_IO_DBG(orig_io_req, "Sending REC\n");
memset(&rec, 0, sizeof(rec));
cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC);
if (!cb_arg) {
printk(KERN_ERR PFX "Unable to allocate cb_arg for REC\n");
rc = -ENOMEM;
goto rec_err;
}
kref_get(&orig_io_req->refcount);
cb_arg->aborted_io_req = orig_io_req;
rec.rec_cmd = ELS_REC;
hton24(rec.rec_s_id, sid);
rec.rec_ox_id = htons(orig_io_req->xid);
rec.rec_rx_id = htons(orig_io_req->task->rxwr_txrd.var_ctx.rx_id);
rc = bnx2fc_initiate_els(tgt, ELS_REC, &rec, sizeof(rec),
bnx2fc_rec_compl, cb_arg,
r_a_tov);
rec_err:
if (rc) {
BNX2FC_IO_DBG(orig_io_req, "REC failed - release\n");
spin_lock_bh(&tgt->tgt_lock);
kref_put(&orig_io_req->refcount, bnx2fc_cmd_release);
spin_unlock_bh(&tgt->tgt_lock);
kfree(cb_arg);
}
return rc;
}
int bnx2fc_send_srr(struct bnx2fc_cmd *orig_io_req, u32 offset, u8 r_ctl)
{
/*
* Dummy function to enable compiling individual patches. Real function
* is in the next patch.
*/
return 0;
struct fcp_srr srr;
struct bnx2fc_rport *tgt = orig_io_req->tgt;
struct fc_lport *lport = tgt->rdata->local_port;
struct bnx2fc_els_cb_arg *cb_arg = NULL;
u32 r_a_tov = lport->r_a_tov;
int rc;
BNX2FC_IO_DBG(orig_io_req, "Sending SRR\n");
memset(&srr, 0, sizeof(srr));
cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC);
if (!cb_arg) {
printk(KERN_ERR PFX "Unable to allocate cb_arg for SRR\n");
rc = -ENOMEM;
goto srr_err;
}
kref_get(&orig_io_req->refcount);
cb_arg->aborted_io_req = orig_io_req;
srr.srr_op = ELS_SRR;
srr.srr_ox_id = htons(orig_io_req->xid);
srr.srr_rx_id = htons(orig_io_req->task->rxwr_txrd.var_ctx.rx_id);
srr.srr_rel_off = htonl(offset);
srr.srr_r_ctl = r_ctl;
orig_io_req->srr_offset = offset;
orig_io_req->srr_rctl = r_ctl;
rc = bnx2fc_initiate_els(tgt, ELS_SRR, &srr, sizeof(srr),
bnx2fc_srr_compl, cb_arg,
r_a_tov);
srr_err:
if (rc) {
BNX2FC_IO_DBG(orig_io_req, "SRR failed - release\n");
spin_lock_bh(&tgt->tgt_lock);
kref_put(&orig_io_req->refcount, bnx2fc_cmd_release);
spin_unlock_bh(&tgt->tgt_lock);
kfree(cb_arg);
} else
set_bit(BNX2FC_FLAG_SRR_SENT, &orig_io_req->req_flags);
return rc;
}
static int bnx2fc_initiate_els(struct bnx2fc_rport *tgt, unsigned int op,
void *data, u32 data_len,
void (*cb_func)(struct bnx2fc_els_cb_arg *cb_arg),
@ -362,9 +746,14 @@ static int bnx2fc_initiate_els(struct bnx2fc_rport *tgt, unsigned int op,
did = tgt->rport->port_id;
sid = tgt->sid;
__fc_fill_fc_hdr(fc_hdr, FC_RCTL_ELS_REQ, did, sid,
FC_TYPE_ELS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
FC_FC_SEQ_INIT, 0);
if (op == ELS_SRR)
__fc_fill_fc_hdr(fc_hdr, FC_RCTL_ELS4_REQ, did, sid,
FC_TYPE_FCP, FC_FC_FIRST_SEQ |
FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
else
__fc_fill_fc_hdr(fc_hdr, FC_RCTL_ELS_REQ, did, sid,
FC_TYPE_ELS, FC_FC_FIRST_SEQ |
FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
/* Obtain exchange id */
xid = els_req->xid;

9
drivers/scsi/bnx2fc/bnx2fc_io.c
View File

@ -18,8 +18,6 @@ static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len,
int bd_index);
static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req);
static void bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req);
static int bnx2fc_post_io_req(struct bnx2fc_rport *tgt,
struct bnx2fc_cmd *io_req);
static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req);
static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req);
static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req,
@ -218,6 +216,11 @@ static void bnx2fc_scsi_done(struct bnx2fc_cmd *io_req, int err_code)
return;
BNX2FC_IO_DBG(io_req, "scsi_done. err_code = 0x%x\n", err_code);
if (test_bit(BNX2FC_FLAG_CMD_LOST, &io_req->req_flags)) {
/* Do not call scsi done for this IO */
return;
}
bnx2fc_unmap_sg_list(io_req);
io_req->sc_cmd = NULL;
if (!sc_cmd) {
@ -1902,7 +1905,7 @@ void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req,
kref_put(&io_req->refcount, bnx2fc_cmd_release);
}
static int bnx2fc_post_io_req(struct bnx2fc_rport *tgt,
int bnx2fc_post_io_req(struct bnx2fc_rport *tgt,
struct bnx2fc_cmd *io_req)
{
struct fcoe_task_ctx_entry *task;