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[SCSI] ibmvfc: Add ADISC support

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Add an ADISC to the target discovery job in order to sanity check whether or
not we need to re-login to the target.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Brian King 2008-07-22 08:31:47 -05:00 committed by James Bottomley
parent 52d7e861cc
commit 989b854579
2 changed files with 171 additions and 0 deletions
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135
drivers/scsi/ibmvscsi/ibmvfc.c
View file

@ -2913,6 +2913,139 @@ static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt)
tgt_dbg(tgt, "Sent Implicit Logout\n"); tgt_dbg(tgt, "Sent Implicit Logout\n");
} }
/**
* ibmvfc_adisc_needs_plogi - Does device need PLOGI?
* @mad: ibmvfc passthru mad struct
* @tgt: ibmvfc target struct
*
* Returns:
* 1 if PLOGI needed / 0 if PLOGI not needed
**/
static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad,
struct ibmvfc_target *tgt)
{
if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name,
sizeof(tgt->ids.port_name)))
return 1;
if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name,
sizeof(tgt->ids.node_name)))
return 1;
if (mad->fc_iu.response[6] != tgt->scsi_id)
return 1;
return 0;
}
/**
* ibmvfc_tgt_adisc_done - Completion handler for ADISC
* @evt: ibmvfc event struct
*
**/
static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt)
{
struct ibmvfc_target *tgt = evt->tgt;
struct ibmvfc_host *vhost = evt->vhost;
struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru;
u32 status = mad->common.status;
u8 fc_reason, fc_explain;
vhost->discovery_threads--;
ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
switch (status) {
case IBMVFC_MAD_SUCCESS:
tgt_dbg(tgt, "ADISC succeeded\n");
if (ibmvfc_adisc_needs_plogi(mad, tgt))
tgt->need_login = 1;
break;
case IBMVFC_MAD_DRIVER_FAILED:
break;
case IBMVFC_MAD_FAILED:
default:
tgt->need_login = 1;
fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16;
fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8;
tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n",
ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error),
mad->iu.status, mad->iu.error,
ibmvfc_get_fc_type(fc_reason), fc_reason,
ibmvfc_get_ls_explain(fc_explain), fc_explain, status);
break;
};
kref_put(&tgt->kref, ibmvfc_release_tgt);
ibmvfc_free_event(evt);
wake_up(&vhost->work_wait_q);
}
/**
* ibmvfc_init_passthru - Initialize an event struct for FC passthru
* @evt: ibmvfc event struct
*
**/
static void ibmvfc_init_passthru(struct ibmvfc_event *evt)
{
struct ibmvfc_passthru_mad *mad = &evt->iu.passthru;
memset(mad, 0, sizeof(*mad));
mad->common.version = 1;
mad->common.opcode = IBMVFC_PASSTHRU;
mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu);
mad->cmd_ioba.va = (u64)evt->crq.ioba +
offsetof(struct ibmvfc_passthru_mad, iu);
mad->cmd_ioba.len = sizeof(mad->iu);
mad->iu.cmd_len = sizeof(mad->fc_iu.payload);
mad->iu.rsp_len = sizeof(mad->fc_iu.response);
mad->iu.cmd.va = (u64)evt->crq.ioba +
offsetof(struct ibmvfc_passthru_mad, fc_iu) +
offsetof(struct ibmvfc_passthru_fc_iu, payload);
mad->iu.cmd.len = sizeof(mad->fc_iu.payload);
mad->iu.rsp.va = (u64)evt->crq.ioba +
offsetof(struct ibmvfc_passthru_mad, fc_iu) +
offsetof(struct ibmvfc_passthru_fc_iu, response);
mad->iu.rsp.len = sizeof(mad->fc_iu.response);
}
/**
* ibmvfc_tgt_adisc - Initiate an ADISC for specified target
* @tgt: ibmvfc target struct
*
**/
static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt)
{
struct ibmvfc_passthru_mad *mad;
struct ibmvfc_host *vhost = tgt->vhost;
struct ibmvfc_event *evt;
if (vhost->discovery_threads >= disc_threads)
return;
kref_get(&tgt->kref);
evt = ibmvfc_get_event(vhost);
vhost->discovery_threads++;
ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT);
evt->tgt = tgt;
ibmvfc_init_passthru(evt);
mad = &evt->iu.passthru;
mad->iu.flags = IBMVFC_FC_ELS;
mad->iu.scsi_id = tgt->scsi_id;
mad->fc_iu.payload[0] = IBMVFC_ADISC;
memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name,
sizeof(vhost->login_buf->resp.port_name));
memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name,
sizeof(vhost->login_buf->resp.node_name));
mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff;
ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT);
if (ibmvfc_send_event(evt, vhost, default_timeout)) {
vhost->discovery_threads--;
ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE);
kref_put(&tgt->kref, ibmvfc_release_tgt);
} else
tgt_dbg(tgt, "Sent ADISC\n");
}
/** /**
* ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD
* @evt: ibmvfc event struct * @evt: ibmvfc event struct
@ -2933,6 +3066,8 @@ static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt)
tgt->new_scsi_id = rsp->scsi_id; tgt->new_scsi_id = rsp->scsi_id;
if (rsp->scsi_id != tgt->scsi_id) if (rsp->scsi_id != tgt->scsi_id)
ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout);
else
ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc);
break; break;
case IBMVFC_MAD_DRIVER_FAILED: case IBMVFC_MAD_DRIVER_FAILED:
break; break;

36
drivers/scsi/ibmvscsi/ibmvfc.h
View file

@ -119,6 +119,7 @@ enum ibmvfc_mad_types {
IBMVFC_PROCESS_LOGIN = 0x0008, IBMVFC_PROCESS_LOGIN = 0x0008,
IBMVFC_QUERY_TARGET = 0x0010, IBMVFC_QUERY_TARGET = 0x0010,
IBMVFC_IMPLICIT_LOGOUT = 0x0040, IBMVFC_IMPLICIT_LOGOUT = 0x0040,
IBMVFC_PASSTHRU = 0x0200,
IBMVFC_TMF_MAD = 0x0100, IBMVFC_TMF_MAD = 0x0100,
}; };
@ -439,6 +440,37 @@ struct ibmvfc_cmd {
struct ibmvfc_fcp_rsp rsp; struct ibmvfc_fcp_rsp rsp;
}__attribute__((packed, aligned (8))); }__attribute__((packed, aligned (8)));
struct ibmvfc_passthru_fc_iu {
u32 payload[7];
#define IBMVFC_ADISC 0x52000000
u32 response[7];
};
struct ibmvfc_passthru_iu {
u64 task_tag;
u32 cmd_len;
u32 rsp_len;
u16 status;
u16 error;
u32 flags;
#define IBMVFC_FC_ELS 0x01
u32 cancel_key;
u32 reserved;
struct srp_direct_buf cmd;
struct srp_direct_buf rsp;
u64 correlation;
u64 scsi_id;
u64 tag;
u64 reserved2[2];
}__attribute__((packed, aligned (8)));
struct ibmvfc_passthru_mad {
struct ibmvfc_mad_common common;
struct srp_direct_buf cmd_ioba;
struct ibmvfc_passthru_iu iu;
struct ibmvfc_passthru_fc_iu fc_iu;
}__attribute__((packed, aligned (8)));
struct ibmvfc_trace_start_entry { struct ibmvfc_trace_start_entry {
u32 xfer_len; u32 xfer_len;
}__attribute__((packed)); }__attribute__((packed));
@ -531,6 +563,7 @@ union ibmvfc_iu {
struct ibmvfc_implicit_logout implicit_logout; struct ibmvfc_implicit_logout implicit_logout;
struct ibmvfc_tmf tmf; struct ibmvfc_tmf tmf;
struct ibmvfc_cmd cmd; struct ibmvfc_cmd cmd;
struct ibmvfc_passthru_mad passthru;
}__attribute__((packed, aligned (8))); }__attribute__((packed, aligned (8)));
enum ibmvfc_target_action { enum ibmvfc_target_action {
@ -656,6 +689,9 @@ struct ibmvfc_host {
#define tgt_dbg(t, fmt, ...) \ #define tgt_dbg(t, fmt, ...) \
DBG_CMD(dev_info((t)->vhost->dev, "%lX: " fmt, (t)->scsi_id, ##__VA_ARGS__)) DBG_CMD(dev_info((t)->vhost->dev, "%lX: " fmt, (t)->scsi_id, ##__VA_ARGS__))
#define tgt_info(t, fmt, ...) \
dev_info((t)->vhost->dev, "%lX: " fmt, (t)->scsi_id, ##__VA_ARGS__)
#define tgt_err(t, fmt, ...) \ #define tgt_err(t, fmt, ...) \
dev_err((t)->vhost->dev, "%lX: " fmt, (t)->scsi_id, ##__VA_ARGS__) dev_err((t)->vhost->dev, "%lX: " fmt, (t)->scsi_id, ##__VA_ARGS__)