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linux/drivers/scsi/aic94xx/aic94xx_dev.c
Dan Williams b91bb29618 [SCSI] libsas: use ->set_dmamode to notify lldds of NCQ parameters 
sas_discover_sata() notifies lldds of sata devices twice.  Once to allow
the 'identify' to be sent, and a second time to allow aic94xx (the only
libsas driver that cares about sata_dev.identify) to setup NCQ
parameters before the device becomes known to the midlayer.  Replace
this double notification and intervening 'identify' with an explicit
->lldd_ata_set_dmamode notification.  With this change all ata internal
commands are issued by libata, so we no longer need sas_issue_ata_cmd().

The data from the identify command only needs to be cached in one
location so ata_device.id replaces domain_device.sata_dev.identify.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19 13:55:42 -06:00

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/*
* Aic94xx SAS/SATA DDB management
*
* Copyright (C) 2005 Adaptec, Inc. All rights reserved.
* Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
*
* This file is licensed under GPLv2.
*
* This file is part of the aic94xx driver.
*
* The aic94xx driver 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; version 2 of the
* License.
*
* The aic94xx driver is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with the aic94xx driver; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* $Id: //depot/aic94xx/aic94xx_dev.c#21 $
*/
#include "aic94xx.h"
#include "aic94xx_hwi.h"
#include "aic94xx_reg.h"
#include "aic94xx_sas.h"
#define FIND_FREE_DDB(_ha) find_first_zero_bit((_ha)->hw_prof.ddb_bitmap, \
(_ha)->hw_prof.max_ddbs)
#define SET_DDB(_ddb, _ha) set_bit(_ddb, (_ha)->hw_prof.ddb_bitmap)
#define CLEAR_DDB(_ddb, _ha) clear_bit(_ddb, (_ha)->hw_prof.ddb_bitmap)
static int asd_get_ddb(struct asd_ha_struct *asd_ha)
{
int ddb, i;
ddb = FIND_FREE_DDB(asd_ha);
if (ddb >= asd_ha->hw_prof.max_ddbs) {
ddb = -ENOMEM;
goto out;
}
SET_DDB(ddb, asd_ha);
for (i = 0; i < sizeof(struct asd_ddb_ssp_smp_target_port); i+= 4)
asd_ddbsite_write_dword(asd_ha, ddb, i, 0);
out:
return ddb;
}
#define INIT_CONN_TAG offsetof(struct asd_ddb_ssp_smp_target_port, init_conn_tag)
#define DEST_SAS_ADDR offsetof(struct asd_ddb_ssp_smp_target_port, dest_sas_addr)
#define SEND_QUEUE_HEAD offsetof(struct asd_ddb_ssp_smp_target_port, send_queue_head)
#define DDB_TYPE offsetof(struct asd_ddb_ssp_smp_target_port, ddb_type)
#define CONN_MASK offsetof(struct asd_ddb_ssp_smp_target_port, conn_mask)
#define DDB_TARG_FLAGS offsetof(struct asd_ddb_ssp_smp_target_port, flags)
#define DDB_TARG_FLAGS2 offsetof(struct asd_ddb_stp_sata_target_port, flags2)
#define EXEC_QUEUE_TAIL offsetof(struct asd_ddb_ssp_smp_target_port, exec_queue_tail)
#define SEND_QUEUE_TAIL offsetof(struct asd_ddb_ssp_smp_target_port, send_queue_tail)
#define SISTER_DDB offsetof(struct asd_ddb_ssp_smp_target_port, sister_ddb)
#define MAX_CCONN offsetof(struct asd_ddb_ssp_smp_target_port, max_concurrent_conn)
#define NUM_CTX offsetof(struct asd_ddb_ssp_smp_target_port, num_contexts)
#define ATA_CMD_SCBPTR offsetof(struct asd_ddb_stp_sata_target_port, ata_cmd_scbptr)
#define SATA_TAG_ALLOC_MASK offsetof(struct asd_ddb_stp_sata_target_port, sata_tag_alloc_mask)
#define NUM_SATA_TAGS offsetof(struct asd_ddb_stp_sata_target_port, num_sata_tags)
#define SATA_STATUS offsetof(struct asd_ddb_stp_sata_target_port, sata_status)
#define NCQ_DATA_SCB_PTR offsetof(struct asd_ddb_stp_sata_target_port, ncq_data_scb_ptr)
#define ITNL_TIMEOUT offsetof(struct asd_ddb_ssp_smp_target_port, itnl_timeout)
static void asd_free_ddb(struct asd_ha_struct *asd_ha, int ddb)
{
if (!ddb || ddb >= 0xFFFF)
return;
asd_ddbsite_write_byte(asd_ha, ddb, DDB_TYPE, DDB_TYPE_UNUSED);
CLEAR_DDB(ddb, asd_ha);
}
static void asd_set_ddb_type(struct domain_device *dev)
{
struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
int ddb = (int) (unsigned long) dev->lldd_dev;
if (dev->dev_type == SATA_PM_PORT)
asd_ddbsite_write_byte(asd_ha,ddb, DDB_TYPE, DDB_TYPE_PM_PORT);
else if (dev->tproto)
asd_ddbsite_write_byte(asd_ha,ddb, DDB_TYPE, DDB_TYPE_TARGET);
else
asd_ddbsite_write_byte(asd_ha,ddb,DDB_TYPE,DDB_TYPE_INITIATOR);
}
static int asd_init_sata_tag_ddb(struct domain_device *dev)
{
struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
int ddb, i;
ddb = asd_get_ddb(asd_ha);
if (ddb < 0)
return ddb;
for (i = 0; i < sizeof(struct asd_ddb_sata_tag); i += 2)
asd_ddbsite_write_word(asd_ha, ddb, i, 0xFFFF);
asd_ddbsite_write_word(asd_ha, (int) (unsigned long) dev->lldd_dev,
SISTER_DDB, ddb);
return 0;
}
void asd_set_dmamode(struct domain_device *dev)
{
struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
struct ata_device *ata_dev = sas_to_ata_dev(dev);
int ddb = (int) (unsigned long) dev->lldd_dev;
u32 qdepth = 0;
if (dev->dev_type == SATA_DEV || dev->dev_type == SATA_PM_PORT) {
if (ata_id_has_ncq(ata_dev->id))
qdepth = ata_id_queue_depth(ata_dev->id);
asd_ddbsite_write_dword(asd_ha, ddb, SATA_TAG_ALLOC_MASK,
(1ULL<<qdepth)-1);
asd_ddbsite_write_byte(asd_ha, ddb, NUM_SATA_TAGS, qdepth);
}
if (qdepth > 0)
if (asd_init_sata_tag_ddb(dev) != 0) {
unsigned long flags;
spin_lock_irqsave(dev->sata_dev.ap->lock, flags);
ata_dev->flags |= ATA_DFLAG_NCQ_OFF;
spin_unlock_irqrestore(dev->sata_dev.ap->lock, flags);
}
}
static int asd_init_sata(struct domain_device *dev)
{
struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
int ddb = (int) (unsigned long) dev->lldd_dev;
asd_ddbsite_write_word(asd_ha, ddb, ATA_CMD_SCBPTR, 0xFFFF);
if (dev->dev_type == SATA_DEV || dev->dev_type == SATA_PM ||
dev->dev_type == SATA_PM_PORT) {
struct dev_to_host_fis *fis = (struct dev_to_host_fis *)
dev->frame_rcvd;
asd_ddbsite_write_byte(asd_ha, ddb, SATA_STATUS, fis->status);
}
asd_ddbsite_write_word(asd_ha, ddb, NCQ_DATA_SCB_PTR, 0xFFFF);
return 0;
}
static int asd_init_target_ddb(struct domain_device *dev)
{
int ddb, i;
struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
u8 flags = 0;
ddb = asd_get_ddb(asd_ha);
if (ddb < 0)
return ddb;
dev->lldd_dev = (void *) (unsigned long) ddb;
asd_ddbsite_write_byte(asd_ha, ddb, 0, DDB_TP_CONN_TYPE);
asd_ddbsite_write_byte(asd_ha, ddb, 1, 0);
asd_ddbsite_write_word(asd_ha, ddb, INIT_CONN_TAG, 0xFFFF);
for (i = 0; i < SAS_ADDR_SIZE; i++)
asd_ddbsite_write_byte(asd_ha, ddb, DEST_SAS_ADDR+i,
dev->sas_addr[i]);
asd_ddbsite_write_word(asd_ha, ddb, SEND_QUEUE_HEAD, 0xFFFF);
asd_set_ddb_type(dev);
asd_ddbsite_write_byte(asd_ha, ddb, CONN_MASK, dev->port->phy_mask);
if (dev->port->oob_mode != SATA_OOB_MODE) {
flags |= OPEN_REQUIRED;
if ((dev->dev_type == SATA_DEV) ||
(dev->tproto & SAS_PROTOCOL_STP)) {
struct smp_resp *rps_resp = &dev->sata_dev.rps_resp;
if (rps_resp->frame_type == SMP_RESPONSE &&
rps_resp->function == SMP_REPORT_PHY_SATA &&
rps_resp->result == SMP_RESP_FUNC_ACC) {
if (rps_resp->rps.affil_valid)
flags |= STP_AFFIL_POL;
if (rps_resp->rps.affil_supp)
flags |= SUPPORTS_AFFIL;
}
} else {
flags |= CONCURRENT_CONN_SUPP;
if (!dev->parent &&
(dev->dev_type == EDGE_DEV ||
dev->dev_type == FANOUT_DEV))
asd_ddbsite_write_byte(asd_ha, ddb, MAX_CCONN,
4);
else
asd_ddbsite_write_byte(asd_ha, ddb, MAX_CCONN,
dev->pathways);
asd_ddbsite_write_byte(asd_ha, ddb, NUM_CTX, 1);
}
}
if (dev->dev_type == SATA_PM)
flags |= SATA_MULTIPORT;
asd_ddbsite_write_byte(asd_ha, ddb, DDB_TARG_FLAGS, flags);
flags = 0;
if (dev->tproto & SAS_PROTOCOL_STP)
flags |= STP_CL_POL_NO_TX;
asd_ddbsite_write_byte(asd_ha, ddb, DDB_TARG_FLAGS2, flags);
asd_ddbsite_write_word(asd_ha, ddb, EXEC_QUEUE_TAIL, 0xFFFF);
asd_ddbsite_write_word(asd_ha, ddb, SEND_QUEUE_TAIL, 0xFFFF);
asd_ddbsite_write_word(asd_ha, ddb, SISTER_DDB, 0xFFFF);
if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) {
i = asd_init_sata(dev);
if (i < 0) {
asd_free_ddb(asd_ha, ddb);
return i;
}
}
if (dev->dev_type == SAS_END_DEV) {
struct sas_end_device *rdev = rphy_to_end_device(dev->rphy);
if (rdev->I_T_nexus_loss_timeout > 0)
asd_ddbsite_write_word(asd_ha, ddb, ITNL_TIMEOUT,
min(rdev->I_T_nexus_loss_timeout,
(u16)ITNL_TIMEOUT_CONST));
else
asd_ddbsite_write_word(asd_ha, ddb, ITNL_TIMEOUT,
(u16)ITNL_TIMEOUT_CONST);
}
return 0;
}
static int asd_init_sata_pm_table_ddb(struct domain_device *dev)
{
struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
int ddb, i;
ddb = asd_get_ddb(asd_ha);
if (ddb < 0)
return ddb;
for (i = 0; i < 32; i += 2)
asd_ddbsite_write_word(asd_ha, ddb, i, 0xFFFF);
asd_ddbsite_write_word(asd_ha, (int) (unsigned long) dev->lldd_dev,
SISTER_DDB, ddb);
return 0;
}
#define PM_PORT_FLAGS offsetof(struct asd_ddb_sata_pm_port, pm_port_flags)
#define PARENT_DDB offsetof(struct asd_ddb_sata_pm_port, parent_ddb)
/**
* asd_init_sata_pm_port_ddb -- SATA Port Multiplier Port
* dev: pointer to domain device
*
* For SATA Port Multiplier Ports we need to allocate one SATA Port
* Multiplier Port DDB and depending on whether the target on it
* supports SATA II NCQ, one SATA Tag DDB.
*/
static int asd_init_sata_pm_port_ddb(struct domain_device *dev)
{
int ddb, i, parent_ddb, pmtable_ddb;
struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
u8 flags;
ddb = asd_get_ddb(asd_ha);
if (ddb < 0)
return ddb;
asd_set_ddb_type(dev);
flags = (dev->sata_dev.port_no << 4) | PM_PORT_SET;
asd_ddbsite_write_byte(asd_ha, ddb, PM_PORT_FLAGS, flags);
asd_ddbsite_write_word(asd_ha, ddb, SISTER_DDB, 0xFFFF);
asd_ddbsite_write_word(asd_ha, ddb, ATA_CMD_SCBPTR, 0xFFFF);
asd_init_sata(dev);
parent_ddb = (int) (unsigned long) dev->parent->lldd_dev;
asd_ddbsite_write_word(asd_ha, ddb, PARENT_DDB, parent_ddb);
pmtable_ddb = asd_ddbsite_read_word(asd_ha, parent_ddb, SISTER_DDB);
asd_ddbsite_write_word(asd_ha, pmtable_ddb, dev->sata_dev.port_no,ddb);
if (asd_ddbsite_read_byte(asd_ha, ddb, NUM_SATA_TAGS) > 0) {
i = asd_init_sata_tag_ddb(dev);
if (i < 0) {
asd_free_ddb(asd_ha, ddb);
return i;
}
}
return 0;
}
static int asd_init_initiator_ddb(struct domain_device *dev)
{
return -ENODEV;
}
/**
* asd_init_sata_pm_ddb -- SATA Port Multiplier
* dev: pointer to domain device
*
* For STP and direct-attached SATA Port Multipliers we need
* one target port DDB entry and one SATA PM table DDB entry.
*/
static int asd_init_sata_pm_ddb(struct domain_device *dev)
{
int res = 0;
res = asd_init_target_ddb(dev);
if (res)
goto out;
res = asd_init_sata_pm_table_ddb(dev);
if (res)
asd_free_ddb(dev->port->ha->lldd_ha,
(int) (unsigned long) dev->lldd_dev);
out:
return res;
}
int asd_dev_found(struct domain_device *dev)
{
unsigned long flags;
int res = 0;
struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
spin_lock_irqsave(&asd_ha->hw_prof.ddb_lock, flags);
switch (dev->dev_type) {
case SATA_PM:
res = asd_init_sata_pm_ddb(dev);
break;
case SATA_PM_PORT:
res = asd_init_sata_pm_port_ddb(dev);
break;
default:
if (dev->tproto)
res = asd_init_target_ddb(dev);
else
res = asd_init_initiator_ddb(dev);
}
spin_unlock_irqrestore(&asd_ha->hw_prof.ddb_lock, flags);
return res;
}
void asd_dev_gone(struct domain_device *dev)
{
int ddb, sister_ddb;
unsigned long flags;
struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
spin_lock_irqsave(&asd_ha->hw_prof.ddb_lock, flags);
ddb = (int) (unsigned long) dev->lldd_dev;
sister_ddb = asd_ddbsite_read_word(asd_ha, ddb, SISTER_DDB);
if (sister_ddb != 0xFFFF)
asd_free_ddb(asd_ha, sister_ddb);
asd_free_ddb(asd_ha, ddb);
dev->lldd_dev = NULL;
spin_unlock_irqrestore(&asd_ha->hw_prof.ddb_lock, flags);
}
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