![James Bottomley](/assets/img/avatar_default.png)
This adds support for host side SMP processing, via a separate SMP interpreter file. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
275 lines
6.8 KiB
C
275 lines
6.8 KiB
C
/*
|
|
* Serial Attached SCSI (SAS) Expander discovery and configuration
|
|
*
|
|
* Copyright (C) 2007 James E.J. Bottomley
|
|
* <James.Bottomley@HansenPartnership.com>
|
|
*
|
|
* 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; version 2 only.
|
|
*/
|
|
#include <linux/scatterlist.h>
|
|
#include <linux/blkdev.h>
|
|
|
|
#include "sas_internal.h"
|
|
|
|
#include <scsi/scsi_transport.h>
|
|
#include <scsi/scsi_transport_sas.h>
|
|
#include "../scsi_sas_internal.h"
|
|
|
|
static void sas_host_smp_discover(struct sas_ha_struct *sas_ha, u8 *resp_data,
|
|
u8 phy_id)
|
|
{
|
|
struct sas_phy *phy;
|
|
struct sas_rphy *rphy;
|
|
|
|
if (phy_id >= sas_ha->num_phys) {
|
|
resp_data[2] = SMP_RESP_NO_PHY;
|
|
return;
|
|
}
|
|
resp_data[2] = SMP_RESP_FUNC_ACC;
|
|
|
|
phy = sas_ha->sas_phy[phy_id]->phy;
|
|
resp_data[9] = phy_id;
|
|
resp_data[13] = phy->negotiated_linkrate;
|
|
memcpy(resp_data + 16, sas_ha->sas_addr, SAS_ADDR_SIZE);
|
|
memcpy(resp_data + 24, sas_ha->sas_phy[phy_id]->attached_sas_addr,
|
|
SAS_ADDR_SIZE);
|
|
resp_data[40] = (phy->minimum_linkrate << 4) |
|
|
phy->minimum_linkrate_hw;
|
|
resp_data[41] = (phy->maximum_linkrate << 4) |
|
|
phy->maximum_linkrate_hw;
|
|
|
|
if (!sas_ha->sas_phy[phy_id]->port ||
|
|
!sas_ha->sas_phy[phy_id]->port->port_dev)
|
|
return;
|
|
|
|
rphy = sas_ha->sas_phy[phy_id]->port->port_dev->rphy;
|
|
resp_data[12] = rphy->identify.device_type << 4;
|
|
resp_data[14] = rphy->identify.initiator_port_protocols;
|
|
resp_data[15] = rphy->identify.target_port_protocols;
|
|
}
|
|
|
|
static void sas_report_phy_sata(struct sas_ha_struct *sas_ha, u8 *resp_data,
|
|
u8 phy_id)
|
|
{
|
|
struct sas_rphy *rphy;
|
|
struct dev_to_host_fis *fis;
|
|
int i;
|
|
|
|
if (phy_id >= sas_ha->num_phys) {
|
|
resp_data[2] = SMP_RESP_NO_PHY;
|
|
return;
|
|
}
|
|
|
|
resp_data[2] = SMP_RESP_PHY_NO_SATA;
|
|
|
|
if (!sas_ha->sas_phy[phy_id]->port)
|
|
return;
|
|
|
|
rphy = sas_ha->sas_phy[phy_id]->port->port_dev->rphy;
|
|
fis = (struct dev_to_host_fis *)
|
|
sas_ha->sas_phy[phy_id]->port->port_dev->frame_rcvd;
|
|
if (rphy->identify.target_port_protocols != SAS_PROTOCOL_SATA)
|
|
return;
|
|
|
|
resp_data[2] = SMP_RESP_FUNC_ACC;
|
|
resp_data[9] = phy_id;
|
|
memcpy(resp_data + 16, sas_ha->sas_phy[phy_id]->attached_sas_addr,
|
|
SAS_ADDR_SIZE);
|
|
|
|
/* check to see if we have a valid d2h fis */
|
|
if (fis->fis_type != 0x34)
|
|
return;
|
|
|
|
/* the d2h fis is required by the standard to be in LE format */
|
|
for (i = 0; i < 20; i += 4) {
|
|
u8 *dst = resp_data + 24 + i, *src =
|
|
&sas_ha->sas_phy[phy_id]->port->port_dev->frame_rcvd[i];
|
|
dst[0] = src[3];
|
|
dst[1] = src[2];
|
|
dst[2] = src[1];
|
|
dst[3] = src[0];
|
|
}
|
|
}
|
|
|
|
static void sas_phy_control(struct sas_ha_struct *sas_ha, u8 phy_id,
|
|
u8 phy_op, enum sas_linkrate min,
|
|
enum sas_linkrate max, u8 *resp_data)
|
|
{
|
|
struct sas_internal *i =
|
|
to_sas_internal(sas_ha->core.shost->transportt);
|
|
struct sas_phy_linkrates rates;
|
|
|
|
if (phy_id >= sas_ha->num_phys) {
|
|
resp_data[2] = SMP_RESP_NO_PHY;
|
|
return;
|
|
}
|
|
switch (phy_op) {
|
|
case PHY_FUNC_NOP:
|
|
case PHY_FUNC_LINK_RESET:
|
|
case PHY_FUNC_HARD_RESET:
|
|
case PHY_FUNC_DISABLE:
|
|
case PHY_FUNC_CLEAR_ERROR_LOG:
|
|
case PHY_FUNC_CLEAR_AFFIL:
|
|
case PHY_FUNC_TX_SATA_PS_SIGNAL:
|
|
break;
|
|
|
|
default:
|
|
resp_data[2] = SMP_RESP_PHY_UNK_OP;
|
|
return;
|
|
}
|
|
|
|
rates.minimum_linkrate = min;
|
|
rates.maximum_linkrate = max;
|
|
|
|
if (i->dft->lldd_control_phy(sas_ha->sas_phy[phy_id], phy_op, &rates))
|
|
resp_data[2] = SMP_RESP_FUNC_FAILED;
|
|
else
|
|
resp_data[2] = SMP_RESP_FUNC_ACC;
|
|
}
|
|
|
|
int sas_smp_host_handler(struct Scsi_Host *shost, struct request *req,
|
|
struct request *rsp)
|
|
{
|
|
u8 *req_data = NULL, *resp_data = NULL, *buf;
|
|
struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
|
|
int error = -EINVAL, resp_data_len = rsp->data_len;
|
|
|
|
/* eight is the minimum size for request and response frames */
|
|
if (req->data_len < 8 || rsp->data_len < 8)
|
|
goto out;
|
|
|
|
if (bio_offset(req->bio) + req->data_len > PAGE_SIZE ||
|
|
bio_offset(rsp->bio) + rsp->data_len > PAGE_SIZE) {
|
|
shost_printk(KERN_ERR, shost,
|
|
"SMP request/response frame crosses page boundary");
|
|
goto out;
|
|
}
|
|
|
|
req_data = kzalloc(req->data_len, GFP_KERNEL);
|
|
|
|
/* make sure frame can always be built ... we copy
|
|
* back only the requested length */
|
|
resp_data = kzalloc(max(rsp->data_len, 128U), GFP_KERNEL);
|
|
|
|
if (!req_data || !resp_data) {
|
|
error = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
local_irq_disable();
|
|
buf = kmap_atomic(bio_page(req->bio), KM_USER0) + bio_offset(req->bio);
|
|
memcpy(req_data, buf, req->data_len);
|
|
kunmap_atomic(buf - bio_offset(req->bio), KM_USER0);
|
|
local_irq_enable();
|
|
|
|
if (req_data[0] != SMP_REQUEST)
|
|
goto out;
|
|
|
|
/* always succeeds ... even if we can't process the request
|
|
* the result is in the response frame */
|
|
error = 0;
|
|
|
|
/* set up default don't know response */
|
|
resp_data[0] = SMP_RESPONSE;
|
|
resp_data[1] = req_data[1];
|
|
resp_data[2] = SMP_RESP_FUNC_UNK;
|
|
|
|
switch (req_data[1]) {
|
|
case SMP_REPORT_GENERAL:
|
|
req->data_len -= 8;
|
|
resp_data_len -= 32;
|
|
resp_data[2] = SMP_RESP_FUNC_ACC;
|
|
resp_data[9] = sas_ha->num_phys;
|
|
break;
|
|
|
|
case SMP_REPORT_MANUF_INFO:
|
|
req->data_len -= 8;
|
|
resp_data_len -= 64;
|
|
resp_data[2] = SMP_RESP_FUNC_ACC;
|
|
memcpy(resp_data + 12, shost->hostt->name,
|
|
SAS_EXPANDER_VENDOR_ID_LEN);
|
|
memcpy(resp_data + 20, "libsas virt phy",
|
|
SAS_EXPANDER_PRODUCT_ID_LEN);
|
|
break;
|
|
|
|
case SMP_READ_GPIO_REG:
|
|
/* FIXME: need GPIO support in the transport class */
|
|
break;
|
|
|
|
case SMP_DISCOVER:
|
|
req->data_len =- 16;
|
|
if (req->data_len < 0) {
|
|
req->data_len = 0;
|
|
error = -EINVAL;
|
|
goto out;
|
|
}
|
|
resp_data_len -= 56;
|
|
sas_host_smp_discover(sas_ha, resp_data, req_data[9]);
|
|
break;
|
|
|
|
case SMP_REPORT_PHY_ERR_LOG:
|
|
/* FIXME: could implement this with additional
|
|
* libsas callbacks providing the HW supports it */
|
|
break;
|
|
|
|
case SMP_REPORT_PHY_SATA:
|
|
req->data_len =- 16;
|
|
if (req->data_len < 0) {
|
|
req->data_len = 0;
|
|
error = -EINVAL;
|
|
goto out;
|
|
}
|
|
resp_data_len -= 60;
|
|
sas_report_phy_sata(sas_ha, resp_data, req_data[9]);
|
|
break;
|
|
|
|
case SMP_REPORT_ROUTE_INFO:
|
|
/* Can't implement; hosts have no routes */
|
|
break;
|
|
|
|
case SMP_WRITE_GPIO_REG:
|
|
/* FIXME: need GPIO support in the transport class */
|
|
break;
|
|
|
|
case SMP_CONF_ROUTE_INFO:
|
|
/* Can't implement; hosts have no routes */
|
|
break;
|
|
|
|
case SMP_PHY_CONTROL:
|
|
req->data_len =- 44;
|
|
if (req->data_len < 0) {
|
|
req->data_len = 0;
|
|
error = -EINVAL;
|
|
goto out;
|
|
}
|
|
resp_data_len -= 8;
|
|
sas_phy_control(sas_ha, req_data[9], req_data[10],
|
|
req_data[32] >> 4, req_data[33] >> 4,
|
|
resp_data);
|
|
break;
|
|
|
|
case SMP_PHY_TEST_FUNCTION:
|
|
/* FIXME: should this be implemented? */
|
|
break;
|
|
|
|
default:
|
|
/* probably a 2.0 function */
|
|
break;
|
|
}
|
|
|
|
local_irq_disable();
|
|
buf = kmap_atomic(bio_page(rsp->bio), KM_USER0) + bio_offset(rsp->bio);
|
|
memcpy(buf, resp_data, rsp->data_len);
|
|
flush_kernel_dcache_page(bio_page(rsp->bio));
|
|
kunmap_atomic(buf - bio_offset(rsp->bio), KM_USER0);
|
|
local_irq_enable();
|
|
rsp->data_len = resp_data_len;
|
|
|
|
out:
|
|
kfree(req_data);
|
|
kfree(resp_data);
|
|
return error;
|
|
}
|