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android_kernel_motorola_sm6225/drivers/scsi/aic94xx/aic94xx_scb.c
James Bottomley a01e70e570 [SCSI] aci94xx: implement link rate setting 
This patch implements the ability to set the minimum and maximum
linkrates for both libsas (for expanders) and aic94xx (for the host
phys).  It also tidies up the setting of the hardware min and max to
make sure they're updated when the expander emits a change broadcast.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-09-07 15:20:23 -05:00

758 lines
22 KiB
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/*
* Aic94xx SAS/SATA driver SCB 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
*
*/
#include <linux/pci.h>
#include "aic94xx.h"
#include "aic94xx_reg.h"
#include "aic94xx_hwi.h"
#include "aic94xx_seq.h"
#include "aic94xx_dump.h"
/* ---------- EMPTY SCB ---------- */
#define DL_PHY_MASK 7
#define BYTES_DMAED 0
#define PRIMITIVE_RECVD 0x08
#define PHY_EVENT 0x10
#define LINK_RESET_ERROR 0x18
#define TIMER_EVENT 0x20
#define REQ_TASK_ABORT 0xF0
#define REQ_DEVICE_RESET 0xF1
#define SIGNAL_NCQ_ERROR 0xF2
#define CLEAR_NCQ_ERROR 0xF3
#define PHY_EVENTS_STATUS (CURRENT_LOSS_OF_SIGNAL | CURRENT_OOB_DONE \
| CURRENT_SPINUP_HOLD | CURRENT_GTO_TIMEOUT \
| CURRENT_OOB_ERROR)
static inline void get_lrate_mode(struct asd_phy *phy, u8 oob_mode)
{
struct sas_phy *sas_phy = phy->sas_phy.phy;
switch (oob_mode & 7) {
case PHY_SPEED_60:
/* FIXME: sas transport class doesn't have this */
phy->sas_phy.linkrate = SAS_LINK_RATE_6_0_GBPS;
phy->sas_phy.phy->negotiated_linkrate = SAS_LINK_RATE_6_0_GBPS;
break;
case PHY_SPEED_30:
phy->sas_phy.linkrate = SAS_LINK_RATE_3_0_GBPS;
phy->sas_phy.phy->negotiated_linkrate = SAS_LINK_RATE_3_0_GBPS;
break;
case PHY_SPEED_15:
phy->sas_phy.linkrate = SAS_LINK_RATE_1_5_GBPS;
phy->sas_phy.phy->negotiated_linkrate = SAS_LINK_RATE_1_5_GBPS;
break;
}
sas_phy->negotiated_linkrate = phy->sas_phy.linkrate;
sas_phy->maximum_linkrate_hw = SAS_LINK_RATE_3_0_GBPS;
sas_phy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
sas_phy->maximum_linkrate = phy->phy_desc->max_sas_lrate;
sas_phy->minimum_linkrate = phy->phy_desc->min_sas_lrate;
if (oob_mode & SAS_MODE)
phy->sas_phy.oob_mode = SAS_OOB_MODE;
else if (oob_mode & SATA_MODE)
phy->sas_phy.oob_mode = SATA_OOB_MODE;
}
static inline void asd_phy_event_tasklet(struct asd_ascb *ascb,
struct done_list_struct *dl)
{
struct asd_ha_struct *asd_ha = ascb->ha;
struct sas_ha_struct *sas_ha = &asd_ha->sas_ha;
int phy_id = dl->status_block[0] & DL_PHY_MASK;
struct asd_phy *phy = &asd_ha->phys[phy_id];
u8 oob_status = dl->status_block[1] & PHY_EVENTS_STATUS;
u8 oob_mode = dl->status_block[2];
switch (oob_status) {
case CURRENT_LOSS_OF_SIGNAL:
/* directly attached device was removed */
ASD_DPRINTK("phy%d: device unplugged\n", phy_id);
asd_turn_led(asd_ha, phy_id, 0);
sas_phy_disconnected(&phy->sas_phy);
sas_ha->notify_phy_event(&phy->sas_phy, PHYE_LOSS_OF_SIGNAL);
break;
case CURRENT_OOB_DONE:
/* hot plugged device */
asd_turn_led(asd_ha, phy_id, 1);
get_lrate_mode(phy, oob_mode);
ASD_DPRINTK("phy%d device plugged: lrate:0x%x, proto:0x%x\n",
phy_id, phy->sas_phy.linkrate, phy->sas_phy.iproto);
sas_ha->notify_phy_event(&phy->sas_phy, PHYE_OOB_DONE);
break;
case CURRENT_SPINUP_HOLD:
/* hot plug SATA, no COMWAKE sent */
asd_turn_led(asd_ha, phy_id, 1);
sas_ha->notify_phy_event(&phy->sas_phy, PHYE_SPINUP_HOLD);
break;
case CURRENT_GTO_TIMEOUT:
case CURRENT_OOB_ERROR:
ASD_DPRINTK("phy%d error while OOB: oob status:0x%x\n", phy_id,
dl->status_block[1]);
asd_turn_led(asd_ha, phy_id, 0);
sas_phy_disconnected(&phy->sas_phy);
sas_ha->notify_phy_event(&phy->sas_phy, PHYE_OOB_ERROR);
break;
}
}
/* If phys are enabled sparsely, this will do the right thing. */
static inline unsigned ord_phy(struct asd_ha_struct *asd_ha,
struct asd_phy *phy)
{
u8 enabled_mask = asd_ha->hw_prof.enabled_phys;
int i, k = 0;
for_each_phy(enabled_mask, enabled_mask, i) {
if (&asd_ha->phys[i] == phy)
return k;
k++;
}
return 0;
}
/**
* asd_get_attached_sas_addr -- extract/generate attached SAS address
* phy: pointer to asd_phy
* sas_addr: pointer to buffer where the SAS address is to be written
*
* This function extracts the SAS address from an IDENTIFY frame
* received. If OOB is SATA, then a SAS address is generated from the
* HA tables.
*
* LOCKING: the frame_rcvd_lock needs to be held since this parses the frame
* buffer.
*/
static inline void asd_get_attached_sas_addr(struct asd_phy *phy, u8 *sas_addr)
{
if (phy->sas_phy.frame_rcvd[0] == 0x34
&& phy->sas_phy.oob_mode == SATA_OOB_MODE) {
struct asd_ha_struct *asd_ha = phy->sas_phy.ha->lldd_ha;
/* FIS device-to-host */
u64 addr = be64_to_cpu(*(__be64 *)phy->phy_desc->sas_addr);
addr += asd_ha->hw_prof.sata_name_base + ord_phy(asd_ha, phy);
*(__be64 *)sas_addr = cpu_to_be64(addr);
} else {
struct sas_identify_frame *idframe =
(void *) phy->sas_phy.frame_rcvd;
memcpy(sas_addr, idframe->sas_addr, SAS_ADDR_SIZE);
}
}
static inline void asd_bytes_dmaed_tasklet(struct asd_ascb *ascb,
struct done_list_struct *dl,
int edb_id, int phy_id)
{
unsigned long flags;
int edb_el = edb_id + ascb->edb_index;
struct asd_dma_tok *edb = ascb->ha->seq.edb_arr[edb_el];
struct asd_phy *phy = &ascb->ha->phys[phy_id];
struct sas_ha_struct *sas_ha = phy->sas_phy.ha;
u16 size = ((dl->status_block[3] & 7) << 8) | dl->status_block[2];
size = min(size, (u16) sizeof(phy->frame_rcvd));
spin_lock_irqsave(&phy->sas_phy.frame_rcvd_lock, flags);
memcpy(phy->sas_phy.frame_rcvd, edb->vaddr, size);
phy->sas_phy.frame_rcvd_size = size;
asd_get_attached_sas_addr(phy, phy->sas_phy.attached_sas_addr);
spin_unlock_irqrestore(&phy->sas_phy.frame_rcvd_lock, flags);
asd_dump_frame_rcvd(phy, dl);
sas_ha->notify_port_event(&phy->sas_phy, PORTE_BYTES_DMAED);
}
static inline void asd_link_reset_err_tasklet(struct asd_ascb *ascb,
struct done_list_struct *dl,
int phy_id)
{
struct asd_ha_struct *asd_ha = ascb->ha;
struct sas_ha_struct *sas_ha = &asd_ha->sas_ha;
struct asd_sas_phy *sas_phy = sas_ha->sas_phy[phy_id];
u8 lr_error = dl->status_block[1];
u8 retries_left = dl->status_block[2];
switch (lr_error) {
case 0:
ASD_DPRINTK("phy%d: Receive ID timer expired\n", phy_id);
break;
case 1:
ASD_DPRINTK("phy%d: Loss of signal\n", phy_id);
break;
case 2:
ASD_DPRINTK("phy%d: Loss of dword sync\n", phy_id);
break;
case 3:
ASD_DPRINTK("phy%d: Receive FIS timeout\n", phy_id);
break;
default:
ASD_DPRINTK("phy%d: unknown link reset error code: 0x%x\n",
phy_id, lr_error);
break;
}
asd_turn_led(asd_ha, phy_id, 0);
sas_phy_disconnected(sas_phy);
sas_ha->notify_port_event(sas_phy, PORTE_LINK_RESET_ERR);
if (retries_left == 0) {
int num = 1;
struct asd_ascb *cp = asd_ascb_alloc_list(ascb->ha, &num,
GFP_ATOMIC);
if (!cp) {
asd_printk("%s: out of memory\n", __FUNCTION__);
goto out;
}
ASD_DPRINTK("phy%d: retries:0 performing link reset seq\n",
phy_id);
asd_build_control_phy(cp, phy_id, ENABLE_PHY);
if (asd_post_ascb_list(ascb->ha, cp, 1) != 0)
asd_ascb_free(cp);
}
out:
;
}
static inline void asd_primitive_rcvd_tasklet(struct asd_ascb *ascb,
struct done_list_struct *dl,
int phy_id)
{
unsigned long flags;
struct sas_ha_struct *sas_ha = &ascb->ha->sas_ha;
struct asd_sas_phy *sas_phy = sas_ha->sas_phy[phy_id];
u8 reg = dl->status_block[1];
u32 cont = dl->status_block[2] << ((reg & 3)*8);
reg &= ~3;
switch (reg) {
case LmPRMSTAT0BYTE0:
switch (cont) {
case LmBROADCH:
case LmBROADRVCH0:
case LmBROADRVCH1:
case LmBROADSES:
ASD_DPRINTK("phy%d: BROADCAST change received:%d\n",
phy_id, cont);
spin_lock_irqsave(&sas_phy->sas_prim_lock, flags);
sas_phy->sas_prim = ffs(cont);
spin_unlock_irqrestore(&sas_phy->sas_prim_lock, flags);
sas_ha->notify_port_event(sas_phy,PORTE_BROADCAST_RCVD);
break;
case LmUNKNOWNP:
ASD_DPRINTK("phy%d: unknown BREAK\n", phy_id);
break;
default:
ASD_DPRINTK("phy%d: primitive reg:0x%x, cont:0x%04x\n",
phy_id, reg, cont);
break;
}
break;
case LmPRMSTAT1BYTE0:
switch (cont) {
case LmHARDRST:
ASD_DPRINTK("phy%d: HARD_RESET primitive rcvd\n",
phy_id);
/* The sequencer disables all phys on that port.
* We have to re-enable the phys ourselves. */
sas_ha->notify_port_event(sas_phy, PORTE_HARD_RESET);
break;
default:
ASD_DPRINTK("phy%d: primitive reg:0x%x, cont:0x%04x\n",
phy_id, reg, cont);
break;
}
break;
default:
ASD_DPRINTK("unknown primitive register:0x%x\n",
dl->status_block[1]);
break;
}
}
/**
* asd_invalidate_edb -- invalidate an EDB and if necessary post the ESCB
* @ascb: pointer to Empty SCB
* @edb_id: index [0,6] to the empty data buffer which is to be invalidated
*
* After an EDB has been invalidated, if all EDBs in this ESCB have been
* invalidated, the ESCB is posted back to the sequencer.
* Context is tasklet/IRQ.
*/
void asd_invalidate_edb(struct asd_ascb *ascb, int edb_id)
{
struct asd_seq_data *seq = &ascb->ha->seq;
struct empty_scb *escb = &ascb->scb->escb;
struct sg_el *eb = &escb->eb[edb_id];
struct asd_dma_tok *edb = seq->edb_arr[ascb->edb_index + edb_id];
memset(edb->vaddr, 0, ASD_EDB_SIZE);
eb->flags |= ELEMENT_NOT_VALID;
escb->num_valid--;
if (escb->num_valid == 0) {
int i;
/* ASD_DPRINTK("reposting escb: vaddr: 0x%p, "
"dma_handle: 0x%08llx, next: 0x%08llx, "
"index:%d, opcode:0x%02x\n",
ascb->dma_scb.vaddr,
(u64)ascb->dma_scb.dma_handle,
le64_to_cpu(ascb->scb->header.next_scb),
le16_to_cpu(ascb->scb->header.index),
ascb->scb->header.opcode);
*/
escb->num_valid = ASD_EDBS_PER_SCB;
for (i = 0; i < ASD_EDBS_PER_SCB; i++)
escb->eb[i].flags = 0;
if (!list_empty(&ascb->list))
list_del_init(&ascb->list);
i = asd_post_escb_list(ascb->ha, ascb, 1);
if (i)
asd_printk("couldn't post escb, err:%d\n", i);
}
}
static void escb_tasklet_complete(struct asd_ascb *ascb,
struct done_list_struct *dl)
{
struct asd_ha_struct *asd_ha = ascb->ha;
struct sas_ha_struct *sas_ha = &asd_ha->sas_ha;
int edb = (dl->opcode & DL_PHY_MASK) - 1; /* [0xc1,0xc7] -> [0,6] */
u8 sb_opcode = dl->status_block[0];
int phy_id = sb_opcode & DL_PHY_MASK;
struct asd_sas_phy *sas_phy = sas_ha->sas_phy[phy_id];
if (edb > 6 || edb < 0) {
ASD_DPRINTK("edb is 0x%x! dl->opcode is 0x%x\n",
edb, dl->opcode);
ASD_DPRINTK("sb_opcode : 0x%x, phy_id: 0x%x\n",
sb_opcode, phy_id);
ASD_DPRINTK("escb: vaddr: 0x%p, "
"dma_handle: 0x%llx, next: 0x%llx, "
"index:%d, opcode:0x%02x\n",
ascb->dma_scb.vaddr,
(unsigned long long)ascb->dma_scb.dma_handle,
(unsigned long long)
le64_to_cpu(ascb->scb->header.next_scb),
le16_to_cpu(ascb->scb->header.index),
ascb->scb->header.opcode);
}
sb_opcode &= ~DL_PHY_MASK;
switch (sb_opcode) {
case BYTES_DMAED:
ASD_DPRINTK("%s: phy%d: BYTES_DMAED\n", __FUNCTION__, phy_id);
asd_bytes_dmaed_tasklet(ascb, dl, edb, phy_id);
break;
case PRIMITIVE_RECVD:
ASD_DPRINTK("%s: phy%d: PRIMITIVE_RECVD\n", __FUNCTION__,
phy_id);
asd_primitive_rcvd_tasklet(ascb, dl, phy_id);
break;
case PHY_EVENT:
ASD_DPRINTK("%s: phy%d: PHY_EVENT\n", __FUNCTION__, phy_id);
asd_phy_event_tasklet(ascb, dl);
break;
case LINK_RESET_ERROR:
ASD_DPRINTK("%s: phy%d: LINK_RESET_ERROR\n", __FUNCTION__,
phy_id);
asd_link_reset_err_tasklet(ascb, dl, phy_id);
break;
case TIMER_EVENT:
ASD_DPRINTK("%s: phy%d: TIMER_EVENT, lost dw sync\n",
__FUNCTION__, phy_id);
asd_turn_led(asd_ha, phy_id, 0);
/* the device is gone */
sas_phy_disconnected(sas_phy);
sas_ha->notify_port_event(sas_phy, PORTE_TIMER_EVENT);
break;
case REQ_TASK_ABORT:
ASD_DPRINTK("%s: phy%d: REQ_TASK_ABORT\n", __FUNCTION__,
phy_id);
break;
case REQ_DEVICE_RESET:
ASD_DPRINTK("%s: phy%d: REQ_DEVICE_RESET\n", __FUNCTION__,
phy_id);
break;
case SIGNAL_NCQ_ERROR:
ASD_DPRINTK("%s: phy%d: SIGNAL_NCQ_ERROR\n", __FUNCTION__,
phy_id);
break;
case CLEAR_NCQ_ERROR:
ASD_DPRINTK("%s: phy%d: CLEAR_NCQ_ERROR\n", __FUNCTION__,
phy_id);
break;
default:
ASD_DPRINTK("%s: phy%d: unknown event:0x%x\n", __FUNCTION__,
phy_id, sb_opcode);
ASD_DPRINTK("edb is 0x%x! dl->opcode is 0x%x\n",
edb, dl->opcode);
ASD_DPRINTK("sb_opcode : 0x%x, phy_id: 0x%x\n",
sb_opcode, phy_id);
ASD_DPRINTK("escb: vaddr: 0x%p, "
"dma_handle: 0x%llx, next: 0x%llx, "
"index:%d, opcode:0x%02x\n",
ascb->dma_scb.vaddr,
(unsigned long long)ascb->dma_scb.dma_handle,
(unsigned long long)
le64_to_cpu(ascb->scb->header.next_scb),
le16_to_cpu(ascb->scb->header.index),
ascb->scb->header.opcode);
break;
}
asd_invalidate_edb(ascb, edb);
}
int asd_init_post_escbs(struct asd_ha_struct *asd_ha)
{
struct asd_seq_data *seq = &asd_ha->seq;
int i;
for (i = 0; i < seq->num_escbs; i++)
seq->escb_arr[i]->tasklet_complete = escb_tasklet_complete;
ASD_DPRINTK("posting %d escbs\n", i);
return asd_post_escb_list(asd_ha, seq->escb_arr[0], seq->num_escbs);
}
/* ---------- CONTROL PHY ---------- */
#define CONTROL_PHY_STATUS (CURRENT_DEVICE_PRESENT | CURRENT_OOB_DONE \
| CURRENT_SPINUP_HOLD | CURRENT_GTO_TIMEOUT \
| CURRENT_OOB_ERROR)
/**
* control_phy_tasklet_complete -- tasklet complete for CONTROL PHY ascb
* @ascb: pointer to an ascb
* @dl: pointer to the done list entry
*
* This function completes a CONTROL PHY scb and frees the ascb.
* A note on LEDs:
* - an LED blinks if there is IO though it,
* - if a device is connected to the LED, it is lit,
* - if no device is connected to the LED, is is dimmed (off).
*/
static void control_phy_tasklet_complete(struct asd_ascb *ascb,
struct done_list_struct *dl)
{
struct asd_ha_struct *asd_ha = ascb->ha;
struct scb *scb = ascb->scb;
struct control_phy *control_phy = &scb->control_phy;
u8 phy_id = control_phy->phy_id;
struct asd_phy *phy = &ascb->ha->phys[phy_id];
u8 status = dl->status_block[0];
u8 oob_status = dl->status_block[1];
u8 oob_mode = dl->status_block[2];
/* u8 oob_signals= dl->status_block[3]; */
if (status != 0) {
ASD_DPRINTK("%s: phy%d status block opcode:0x%x\n",
__FUNCTION__, phy_id, status);
goto out;
}
switch (control_phy->sub_func) {
case DISABLE_PHY:
asd_ha->hw_prof.enabled_phys &= ~(1 << phy_id);
asd_turn_led(asd_ha, phy_id, 0);
asd_control_led(asd_ha, phy_id, 0);
ASD_DPRINTK("%s: disable phy%d\n", __FUNCTION__, phy_id);
break;
case ENABLE_PHY:
asd_control_led(asd_ha, phy_id, 1);
if (oob_status & CURRENT_OOB_DONE) {
asd_ha->hw_prof.enabled_phys |= (1 << phy_id);
get_lrate_mode(phy, oob_mode);
asd_turn_led(asd_ha, phy_id, 1);
ASD_DPRINTK("%s: phy%d, lrate:0x%x, proto:0x%x\n",
__FUNCTION__, phy_id,phy->sas_phy.linkrate,
phy->sas_phy.iproto);
} else if (oob_status & CURRENT_SPINUP_HOLD) {
asd_ha->hw_prof.enabled_phys |= (1 << phy_id);
asd_turn_led(asd_ha, phy_id, 1);
ASD_DPRINTK("%s: phy%d, spinup hold\n", __FUNCTION__,
phy_id);
} else if (oob_status & CURRENT_ERR_MASK) {
asd_turn_led(asd_ha, phy_id, 0);
ASD_DPRINTK("%s: phy%d: error: oob status:0x%02x\n",
__FUNCTION__, phy_id, oob_status);
} else if (oob_status & (CURRENT_HOT_PLUG_CNCT
| CURRENT_DEVICE_PRESENT)) {
asd_ha->hw_prof.enabled_phys |= (1 << phy_id);
asd_turn_led(asd_ha, phy_id, 1);
ASD_DPRINTK("%s: phy%d: hot plug or device present\n",
__FUNCTION__, phy_id);
} else {
asd_ha->hw_prof.enabled_phys |= (1 << phy_id);
asd_turn_led(asd_ha, phy_id, 0);
ASD_DPRINTK("%s: phy%d: no device present: "
"oob_status:0x%x\n",
__FUNCTION__, phy_id, oob_status);
}
break;
case RELEASE_SPINUP_HOLD:
case PHY_NO_OP:
case EXECUTE_HARD_RESET:
ASD_DPRINTK("%s: phy%d: sub_func:0x%x\n", __FUNCTION__,
phy_id, control_phy->sub_func);
/* XXX finish */
break;
default:
ASD_DPRINTK("%s: phy%d: sub_func:0x%x?\n", __FUNCTION__,
phy_id, control_phy->sub_func);
break;
}
out:
asd_ascb_free(ascb);
}
static inline void set_speed_mask(u8 *speed_mask, struct asd_phy_desc *pd)
{
/* disable all speeds, then enable defaults */
*speed_mask = SAS_SPEED_60_DIS | SAS_SPEED_30_DIS | SAS_SPEED_15_DIS
| SATA_SPEED_30_DIS | SATA_SPEED_15_DIS;
switch (pd->max_sas_lrate) {
case SAS_LINK_RATE_6_0_GBPS:
*speed_mask &= ~SAS_SPEED_60_DIS;
default:
case SAS_LINK_RATE_3_0_GBPS:
*speed_mask &= ~SAS_SPEED_30_DIS;
case SAS_LINK_RATE_1_5_GBPS:
*speed_mask &= ~SAS_SPEED_15_DIS;
}
switch (pd->min_sas_lrate) {
case SAS_LINK_RATE_6_0_GBPS:
*speed_mask |= SAS_SPEED_30_DIS;
case SAS_LINK_RATE_3_0_GBPS:
*speed_mask |= SAS_SPEED_15_DIS;
default:
case SAS_LINK_RATE_1_5_GBPS:
/* nothing to do */
;
}
switch (pd->max_sata_lrate) {
case SAS_LINK_RATE_3_0_GBPS:
*speed_mask &= ~SATA_SPEED_30_DIS;
default:
case SAS_LINK_RATE_1_5_GBPS:
*speed_mask &= ~SATA_SPEED_15_DIS;
}
switch (pd->min_sata_lrate) {
case SAS_LINK_RATE_3_0_GBPS:
*speed_mask |= SATA_SPEED_15_DIS;
default:
case SAS_LINK_RATE_1_5_GBPS:
/* nothing to do */
;
}
}
/**
* asd_build_control_phy -- build a CONTROL PHY SCB
* @ascb: pointer to an ascb
* @phy_id: phy id to control, integer
* @subfunc: subfunction, what to actually to do the phy
*
* This function builds a CONTROL PHY scb. No allocation of any kind
* is performed. @ascb is allocated with the list function.
* The caller can override the ascb->tasklet_complete to point
* to its own callback function. It must call asd_ascb_free()
* at its tasklet complete function.
* See the default implementation.
*/
void asd_build_control_phy(struct asd_ascb *ascb, int phy_id, u8 subfunc)
{
struct asd_phy *phy = &ascb->ha->phys[phy_id];
struct scb *scb = ascb->scb;
struct control_phy *control_phy = &scb->control_phy;
scb->header.opcode = CONTROL_PHY;
control_phy->phy_id = (u8) phy_id;
control_phy->sub_func = subfunc;
switch (subfunc) {
case EXECUTE_HARD_RESET: /* 0x81 */
case ENABLE_PHY: /* 0x01 */
/* decide hot plug delay */
control_phy->hot_plug_delay = HOTPLUG_DELAY_TIMEOUT;
/* decide speed mask */
set_speed_mask(&control_phy->speed_mask, phy->phy_desc);
/* initiator port settings are in the hi nibble */
if (phy->sas_phy.role == PHY_ROLE_INITIATOR)
control_phy->port_type = SAS_PROTO_ALL << 4;
else if (phy->sas_phy.role == PHY_ROLE_TARGET)
control_phy->port_type = SAS_PROTO_ALL;
else
control_phy->port_type =
(SAS_PROTO_ALL << 4) | SAS_PROTO_ALL;
/* link reset retries, this should be nominal */
control_phy->link_reset_retries = 10;
case RELEASE_SPINUP_HOLD: /* 0x02 */
/* decide the func_mask */
control_phy->func_mask = FUNCTION_MASK_DEFAULT;
if (phy->phy_desc->flags & ASD_SATA_SPINUP_HOLD)
control_phy->func_mask &= ~SPINUP_HOLD_DIS;
else
control_phy->func_mask |= SPINUP_HOLD_DIS;
}
control_phy->conn_handle = cpu_to_le16(0xFFFF);
ascb->tasklet_complete = control_phy_tasklet_complete;
}
/* ---------- INITIATE LINK ADM TASK ---------- */
static void link_adm_tasklet_complete(struct asd_ascb *ascb,
struct done_list_struct *dl)
{
u8 opcode = dl->opcode;
struct initiate_link_adm *link_adm = &ascb->scb->link_adm;
u8 phy_id = link_adm->phy_id;
if (opcode != TC_NO_ERROR) {
asd_printk("phy%d: link adm task 0x%x completed with error "
"0x%x\n", phy_id, link_adm->sub_func, opcode);
}
ASD_DPRINTK("phy%d: link adm task 0x%x: 0x%x\n",
phy_id, link_adm->sub_func, opcode);
asd_ascb_free(ascb);
}
void asd_build_initiate_link_adm_task(struct asd_ascb *ascb, int phy_id,
u8 subfunc)
{
struct scb *scb = ascb->scb;
struct initiate_link_adm *link_adm = &scb->link_adm;
scb->header.opcode = INITIATE_LINK_ADM_TASK;
link_adm->phy_id = phy_id;
link_adm->sub_func = subfunc;
link_adm->conn_handle = cpu_to_le16(0xFFFF);
ascb->tasklet_complete = link_adm_tasklet_complete;
}
/* ---------- SCB timer ---------- */
/**
* asd_ascb_timedout -- called when a pending SCB's timer has expired
* @data: unsigned long, a pointer to the ascb in question
*
* This is the default timeout function which does the most necessary.
* Upper layers can implement their own timeout function, say to free
* resources they have with this SCB, and then call this one at the
* end of their timeout function. To do this, one should initialize
* the ascb->timer.{function, data, expires} prior to calling the post
* funcion. The timer is started by the post function.
*/
void asd_ascb_timedout(unsigned long data)
{
struct asd_ascb *ascb = (void *) data;
struct asd_seq_data *seq = &ascb->ha->seq;
unsigned long flags;
ASD_DPRINTK("scb:0x%x timed out\n", ascb->scb->header.opcode);
spin_lock_irqsave(&seq->pend_q_lock, flags);
seq->pending--;
list_del_init(&ascb->list);
spin_unlock_irqrestore(&seq->pend_q_lock, flags);
asd_ascb_free(ascb);
}
/* ---------- CONTROL PHY ---------- */
/* Given the spec value, return a driver value. */
static const int phy_func_table[] = {
[PHY_FUNC_NOP] = PHY_NO_OP,
[PHY_FUNC_LINK_RESET] = ENABLE_PHY,
[PHY_FUNC_HARD_RESET] = EXECUTE_HARD_RESET,
[PHY_FUNC_DISABLE] = DISABLE_PHY,
[PHY_FUNC_RELEASE_SPINUP_HOLD] = RELEASE_SPINUP_HOLD,
};
int asd_control_phy(struct asd_sas_phy *phy, enum phy_func func, void *arg)
{
struct asd_ha_struct *asd_ha = phy->ha->lldd_ha;
struct asd_phy_desc *pd = asd_ha->phys[phy->id].phy_desc;
struct asd_ascb *ascb;
struct sas_phy_linkrates *rates;
int res = 1;
switch (func) {
case PHY_FUNC_CLEAR_ERROR_LOG:
return -ENOSYS;
case PHY_FUNC_SET_LINK_RATE:
rates = arg;
if (rates->minimum_linkrate) {
pd->min_sas_lrate = rates->minimum_linkrate;
pd->min_sata_lrate = rates->minimum_linkrate;
}
if (rates->maximum_linkrate) {
pd->max_sas_lrate = rates->maximum_linkrate;
pd->max_sata_lrate = rates->maximum_linkrate;
}
func = PHY_FUNC_LINK_RESET;
break;
default:
break;
}
ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL);
if (!ascb)
return -ENOMEM;
asd_build_control_phy(ascb, phy->id, phy_func_table[func]);
res = asd_post_ascb_list(asd_ha, ascb , 1);
if (res)
asd_ascb_free(ascb);
return res;
}
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