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be_main.c
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be_main.c
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/*
* This file is part of the Emulex Linux Device Driver for Enterprise iSCSI
* Host Bus Adapters. Refer to the README file included with this package
* for driver version and adapter compatibility.
*
* Copyright (c) 2018 Broadcom. All Rights Reserved.
* The term “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as published
* by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful. ALL EXPRESS
* OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
* IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
* OR NON-INFRINGEMENT, ARE DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH
* DISCLAIMERS ARE HELD TO BE LEGALLY INVALID.
* See the GNU General Public License for more details, a copy of which
* can be found in the file COPYING included with this package.
*
* Contact Information:
* linux-drivers@broadcom.com
*
*/
#include <linux/reboot.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/blkdev.h>
#include <linux/pci.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/semaphore.h>
#include <linux/iscsi_boot_sysfs.h>
#include <linux/module.h>
#include <linux/bsg-lib.h>
#include <linux/irq_poll.h>
#include <scsi/libiscsi.h>
#include <scsi/scsi_bsg_iscsi.h>
#include <scsi/scsi_netlink.h>
#include <scsi/scsi_transport_iscsi.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi.h>
#include "be_main.h"
#include "be_iscsi.h"
#include "be_mgmt.h"
#include "be_cmds.h"
static unsigned int be_iopoll_budget = 10;
static unsigned int be_max_phys_size = 64;
static unsigned int enable_msix = 1;
MODULE_DESCRIPTION(DRV_DESC " " BUILD_STR);
MODULE_VERSION(BUILD_STR);
MODULE_AUTHOR("Emulex Corporation");
MODULE_LICENSE("GPL");
module_param(be_iopoll_budget, int, 0);
module_param(enable_msix, int, 0);
module_param(be_max_phys_size, uint, S_IRUGO);
MODULE_PARM_DESC(be_max_phys_size,
"Maximum Size (In Kilobytes) of physically contiguous "
"memory that can be allocated. Range is 16 - 128");
#define beiscsi_disp_param(_name)\
static ssize_t \
beiscsi_##_name##_disp(struct device *dev,\
struct device_attribute *attrib, char *buf) \
{ \
struct Scsi_Host *shost = class_to_shost(dev);\
struct beiscsi_hba *phba = iscsi_host_priv(shost); \
return snprintf(buf, PAGE_SIZE, "%d\n",\
phba->attr_##_name);\
}
#define beiscsi_change_param(_name, _minval, _maxval, _defaval)\
static int \
beiscsi_##_name##_change(struct beiscsi_hba *phba, uint32_t val)\
{\
if (val >= _minval && val <= _maxval) {\
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_INIT,\
"BA_%d : beiscsi_"#_name" updated "\
"from 0x%x ==> 0x%x\n",\
phba->attr_##_name, val); \
phba->attr_##_name = val;\
return 0;\
} \
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_INIT, \
"BA_%d beiscsi_"#_name" attribute "\
"cannot be updated to 0x%x, "\
"range allowed is ["#_minval" - "#_maxval"]\n", val);\
return -EINVAL;\
}
#define beiscsi_store_param(_name) \
static ssize_t \
beiscsi_##_name##_store(struct device *dev,\
struct device_attribute *attr, const char *buf,\
size_t count) \
{ \
struct Scsi_Host *shost = class_to_shost(dev);\
struct beiscsi_hba *phba = iscsi_host_priv(shost);\
uint32_t param_val = 0;\
if (!isdigit(buf[0]))\
return -EINVAL;\
if (sscanf(buf, "%i", ¶m_val) != 1)\
return -EINVAL;\
if (beiscsi_##_name##_change(phba, param_val) == 0) \
return strlen(buf);\
else \
return -EINVAL;\
}
#define beiscsi_init_param(_name, _minval, _maxval, _defval) \
static int \
beiscsi_##_name##_init(struct beiscsi_hba *phba, uint32_t val) \
{ \
if (val >= _minval && val <= _maxval) {\
phba->attr_##_name = val;\
return 0;\
} \
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_INIT,\
"BA_%d beiscsi_"#_name" attribute " \
"cannot be updated to 0x%x, "\
"range allowed is ["#_minval" - "#_maxval"]\n", val);\
phba->attr_##_name = _defval;\
return -EINVAL;\
}
#define BEISCSI_RW_ATTR(_name, _minval, _maxval, _defval, _descp) \
static uint beiscsi_##_name = _defval;\
module_param(beiscsi_##_name, uint, S_IRUGO);\
MODULE_PARM_DESC(beiscsi_##_name, _descp);\
beiscsi_disp_param(_name)\
beiscsi_change_param(_name, _minval, _maxval, _defval)\
beiscsi_store_param(_name)\
beiscsi_init_param(_name, _minval, _maxval, _defval)\
DEVICE_ATTR(beiscsi_##_name, S_IRUGO | S_IWUSR,\
beiscsi_##_name##_disp, beiscsi_##_name##_store)
/*
* When new log level added update the
* the MAX allowed value for log_enable
*/
BEISCSI_RW_ATTR(log_enable, 0x00,
0xFF, 0x00, "Enable logging Bit Mask\n"
"\t\t\t\tInitialization Events : 0x01\n"
"\t\t\t\tMailbox Events : 0x02\n"
"\t\t\t\tMiscellaneous Events : 0x04\n"
"\t\t\t\tError Handling : 0x08\n"
"\t\t\t\tIO Path Events : 0x10\n"
"\t\t\t\tConfiguration Path : 0x20\n"
"\t\t\t\tiSCSI Protocol : 0x40\n");
DEVICE_ATTR(beiscsi_drvr_ver, S_IRUGO, beiscsi_drvr_ver_disp, NULL);
DEVICE_ATTR(beiscsi_adapter_family, S_IRUGO, beiscsi_adap_family_disp, NULL);
DEVICE_ATTR(beiscsi_fw_ver, S_IRUGO, beiscsi_fw_ver_disp, NULL);
DEVICE_ATTR(beiscsi_phys_port, S_IRUGO, beiscsi_phys_port_disp, NULL);
DEVICE_ATTR(beiscsi_active_session_count, S_IRUGO,
beiscsi_active_session_disp, NULL);
DEVICE_ATTR(beiscsi_free_session_count, S_IRUGO,
beiscsi_free_session_disp, NULL);
static struct device_attribute *beiscsi_attrs[] = {
&dev_attr_beiscsi_log_enable,
&dev_attr_beiscsi_drvr_ver,
&dev_attr_beiscsi_adapter_family,
&dev_attr_beiscsi_fw_ver,
&dev_attr_beiscsi_active_session_count,
&dev_attr_beiscsi_free_session_count,
&dev_attr_beiscsi_phys_port,
NULL,
};
static char const *cqe_desc[] = {
"RESERVED_DESC",
"SOL_CMD_COMPLETE",
"SOL_CMD_KILLED_DATA_DIGEST_ERR",
"CXN_KILLED_PDU_SIZE_EXCEEDS_DSL",
"CXN_KILLED_BURST_LEN_MISMATCH",
"CXN_KILLED_AHS_RCVD",
"CXN_KILLED_HDR_DIGEST_ERR",
"CXN_KILLED_UNKNOWN_HDR",
"CXN_KILLED_STALE_ITT_TTT_RCVD",
"CXN_KILLED_INVALID_ITT_TTT_RCVD",
"CXN_KILLED_RST_RCVD",
"CXN_KILLED_TIMED_OUT",
"CXN_KILLED_RST_SENT",
"CXN_KILLED_FIN_RCVD",
"CXN_KILLED_BAD_UNSOL_PDU_RCVD",
"CXN_KILLED_BAD_WRB_INDEX_ERROR",
"CXN_KILLED_OVER_RUN_RESIDUAL",
"CXN_KILLED_UNDER_RUN_RESIDUAL",
"CMD_KILLED_INVALID_STATSN_RCVD",
"CMD_KILLED_INVALID_R2T_RCVD",
"CMD_CXN_KILLED_LUN_INVALID",
"CMD_CXN_KILLED_ICD_INVALID",
"CMD_CXN_KILLED_ITT_INVALID",
"CMD_CXN_KILLED_SEQ_OUTOFORDER",
"CMD_CXN_KILLED_INVALID_DATASN_RCVD",
"CXN_INVALIDATE_NOTIFY",
"CXN_INVALIDATE_INDEX_NOTIFY",
"CMD_INVALIDATED_NOTIFY",
"UNSOL_HDR_NOTIFY",
"UNSOL_DATA_NOTIFY",
"UNSOL_DATA_DIGEST_ERROR_NOTIFY",
"DRIVERMSG_NOTIFY",
"CXN_KILLED_CMND_DATA_NOT_ON_SAME_CONN",
"SOL_CMD_KILLED_DIF_ERR",
"CXN_KILLED_SYN_RCVD",
"CXN_KILLED_IMM_DATA_RCVD"
};
static int beiscsi_eh_abort(struct scsi_cmnd *sc)
{
struct iscsi_task *abrt_task = (struct iscsi_task *)sc->SCp.ptr;
struct iscsi_cls_session *cls_session;
struct beiscsi_io_task *abrt_io_task;
struct beiscsi_conn *beiscsi_conn;
struct iscsi_session *session;
struct invldt_cmd_tbl inv_tbl;
struct beiscsi_hba *phba;
struct iscsi_conn *conn;
int rc;
cls_session = starget_to_session(scsi_target(sc->device));
session = cls_session->dd_data;
/* check if we raced, task just got cleaned up under us */
spin_lock_bh(&session->back_lock);
if (!abrt_task || !abrt_task->sc) {
spin_unlock_bh(&session->back_lock);
return SUCCESS;
}
/* get a task ref till FW processes the req for the ICD used */
__iscsi_get_task(abrt_task);
abrt_io_task = abrt_task->dd_data;
conn = abrt_task->conn;
beiscsi_conn = conn->dd_data;
phba = beiscsi_conn->phba;
/* mark WRB invalid which have been not processed by FW yet */
if (is_chip_be2_be3r(phba)) {
AMAP_SET_BITS(struct amap_iscsi_wrb, invld,
abrt_io_task->pwrb_handle->pwrb, 1);
} else {
AMAP_SET_BITS(struct amap_iscsi_wrb_v2, invld,
abrt_io_task->pwrb_handle->pwrb, 1);
}
inv_tbl.cid = beiscsi_conn->beiscsi_conn_cid;
inv_tbl.icd = abrt_io_task->psgl_handle->sgl_index;
spin_unlock_bh(&session->back_lock);
rc = beiscsi_mgmt_invalidate_icds(phba, &inv_tbl, 1);
iscsi_put_task(abrt_task);
if (rc) {
beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_EH,
"BM_%d : sc %p invalidation failed %d\n",
sc, rc);
return FAILED;
}
return iscsi_eh_abort(sc);
}
static int beiscsi_eh_device_reset(struct scsi_cmnd *sc)
{
struct beiscsi_invldt_cmd_tbl {
struct invldt_cmd_tbl tbl[BE_INVLDT_CMD_TBL_SZ];
struct iscsi_task *task[BE_INVLDT_CMD_TBL_SZ];
} *inv_tbl;
struct iscsi_cls_session *cls_session;
struct beiscsi_conn *beiscsi_conn;
struct beiscsi_io_task *io_task;
struct iscsi_session *session;
struct beiscsi_hba *phba;
struct iscsi_conn *conn;
struct iscsi_task *task;
unsigned int i, nents;
int rc, more = 0;
cls_session = starget_to_session(scsi_target(sc->device));
session = cls_session->dd_data;
spin_lock_bh(&session->frwd_lock);
if (!session->leadconn || session->state != ISCSI_STATE_LOGGED_IN) {
spin_unlock_bh(&session->frwd_lock);
return FAILED;
}
conn = session->leadconn;
beiscsi_conn = conn->dd_data;
phba = beiscsi_conn->phba;
inv_tbl = kzalloc(sizeof(*inv_tbl), GFP_ATOMIC);
if (!inv_tbl) {
spin_unlock_bh(&session->frwd_lock);
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_EH,
"BM_%d : invldt_cmd_tbl alloc failed\n");
return FAILED;
}
nents = 0;
/* take back_lock to prevent task from getting cleaned up under us */
spin_lock(&session->back_lock);
for (i = 0; i < conn->session->cmds_max; i++) {
task = conn->session->cmds[i];
if (!task->sc)
continue;
if (sc->device->lun != task->sc->device->lun)
continue;
/**
* Can't fit in more cmds? Normally this won't happen b'coz
* BEISCSI_CMD_PER_LUN is same as BE_INVLDT_CMD_TBL_SZ.
*/
if (nents == BE_INVLDT_CMD_TBL_SZ) {
more = 1;
break;
}
/* get a task ref till FW processes the req for the ICD used */
__iscsi_get_task(task);
io_task = task->dd_data;
/* mark WRB invalid which have been not processed by FW yet */
if (is_chip_be2_be3r(phba)) {
AMAP_SET_BITS(struct amap_iscsi_wrb, invld,
io_task->pwrb_handle->pwrb, 1);
} else {
AMAP_SET_BITS(struct amap_iscsi_wrb_v2, invld,
io_task->pwrb_handle->pwrb, 1);
}
inv_tbl->tbl[nents].cid = beiscsi_conn->beiscsi_conn_cid;
inv_tbl->tbl[nents].icd = io_task->psgl_handle->sgl_index;
inv_tbl->task[nents] = task;
nents++;
}
spin_unlock(&session->back_lock);
spin_unlock_bh(&session->frwd_lock);
rc = SUCCESS;
if (!nents)
goto end_reset;
if (more) {
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_EH,
"BM_%d : number of cmds exceeds size of invalidation table\n");
rc = FAILED;
goto end_reset;
}
if (beiscsi_mgmt_invalidate_icds(phba, &inv_tbl->tbl[0], nents)) {
beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_EH,
"BM_%d : cid %u scmds invalidation failed\n",
beiscsi_conn->beiscsi_conn_cid);
rc = FAILED;
}
end_reset:
for (i = 0; i < nents; i++)
iscsi_put_task(inv_tbl->task[i]);
kfree(inv_tbl);
if (rc == SUCCESS)
rc = iscsi_eh_device_reset(sc);
return rc;
}
/*------------------- PCI Driver operations and data ----------------- */
static const struct pci_device_id beiscsi_pci_id_table[] = {
{ PCI_DEVICE(BE_VENDOR_ID, BE_DEVICE_ID1) },
{ PCI_DEVICE(BE_VENDOR_ID, BE_DEVICE_ID2) },
{ PCI_DEVICE(BE_VENDOR_ID, OC_DEVICE_ID1) },
{ PCI_DEVICE(BE_VENDOR_ID, OC_DEVICE_ID2) },
{ PCI_DEVICE(BE_VENDOR_ID, OC_DEVICE_ID3) },
{ PCI_DEVICE(ELX_VENDOR_ID, OC_SKH_ID1) },
{ 0 }
};
MODULE_DEVICE_TABLE(pci, beiscsi_pci_id_table);
static struct scsi_host_template beiscsi_sht = {
.module = THIS_MODULE,
.name = "Emulex 10Gbe open-iscsi Initiator Driver",
.proc_name = DRV_NAME,
.queuecommand = iscsi_queuecommand,
.change_queue_depth = scsi_change_queue_depth,
.target_alloc = iscsi_target_alloc,
.eh_timed_out = iscsi_eh_cmd_timed_out,
.eh_abort_handler = beiscsi_eh_abort,
.eh_device_reset_handler = beiscsi_eh_device_reset,
.eh_target_reset_handler = iscsi_eh_session_reset,
.shost_attrs = beiscsi_attrs,
.sg_tablesize = BEISCSI_SGLIST_ELEMENTS,
.can_queue = BE2_IO_DEPTH,
.this_id = -1,
.max_sectors = BEISCSI_MAX_SECTORS,
.max_segment_size = 65536,
.cmd_per_lun = BEISCSI_CMD_PER_LUN,
.vendor_id = SCSI_NL_VID_TYPE_PCI | BE_VENDOR_ID,
.track_queue_depth = 1,
};
static struct scsi_transport_template *beiscsi_scsi_transport;
static struct beiscsi_hba *beiscsi_hba_alloc(struct pci_dev *pcidev)
{
struct beiscsi_hba *phba;
struct Scsi_Host *shost;
shost = iscsi_host_alloc(&beiscsi_sht, sizeof(*phba), 0);
if (!shost) {
dev_err(&pcidev->dev,
"beiscsi_hba_alloc - iscsi_host_alloc failed\n");
return NULL;
}
shost->max_id = BE2_MAX_SESSIONS - 1;
shost->max_channel = 0;
shost->max_cmd_len = BEISCSI_MAX_CMD_LEN;
shost->max_lun = BEISCSI_NUM_MAX_LUN;
shost->transportt = beiscsi_scsi_transport;
phba = iscsi_host_priv(shost);
memset(phba, 0, sizeof(*phba));
phba->shost = shost;
phba->pcidev = pci_dev_get(pcidev);
pci_set_drvdata(pcidev, phba);
phba->interface_handle = 0xFFFFFFFF;
return phba;
}
static void beiscsi_unmap_pci_function(struct beiscsi_hba *phba)
{
if (phba->csr_va) {
iounmap(phba->csr_va);
phba->csr_va = NULL;
}
if (phba->db_va) {
iounmap(phba->db_va);
phba->db_va = NULL;
}
if (phba->pci_va) {
iounmap(phba->pci_va);
phba->pci_va = NULL;
}
}
static int beiscsi_map_pci_bars(struct beiscsi_hba *phba,
struct pci_dev *pcidev)
{
u8 __iomem *addr;
int pcicfg_reg;
addr = ioremap(pci_resource_start(pcidev, 2),
pci_resource_len(pcidev, 2));
if (addr == NULL)
return -ENOMEM;
phba->ctrl.csr = addr;
phba->csr_va = addr;
addr = ioremap(pci_resource_start(pcidev, 4), 128 * 1024);
if (addr == NULL)
goto pci_map_err;
phba->ctrl.db = addr;
phba->db_va = addr;
if (phba->generation == BE_GEN2)
pcicfg_reg = 1;
else
pcicfg_reg = 0;
addr = ioremap(pci_resource_start(pcidev, pcicfg_reg),
pci_resource_len(pcidev, pcicfg_reg));
if (addr == NULL)
goto pci_map_err;
phba->ctrl.pcicfg = addr;
phba->pci_va = addr;
return 0;
pci_map_err:
beiscsi_unmap_pci_function(phba);
return -ENOMEM;
}
static int beiscsi_enable_pci(struct pci_dev *pcidev)
{
int ret;
ret = pci_enable_device(pcidev);
if (ret) {
dev_err(&pcidev->dev,
"beiscsi_enable_pci - enable device failed\n");
return ret;
}
ret = pci_request_regions(pcidev, DRV_NAME);
if (ret) {
dev_err(&pcidev->dev,
"beiscsi_enable_pci - request region failed\n");
goto pci_dev_disable;
}
pci_set_master(pcidev);
ret = dma_set_mask_and_coherent(&pcidev->dev, DMA_BIT_MASK(64));
if (ret) {
ret = dma_set_mask_and_coherent(&pcidev->dev, DMA_BIT_MASK(32));
if (ret) {
dev_err(&pcidev->dev, "Could not set PCI DMA Mask\n");
goto pci_region_release;
}
}
return 0;
pci_region_release:
pci_release_regions(pcidev);
pci_dev_disable:
pci_disable_device(pcidev);
return ret;
}
static int be_ctrl_init(struct beiscsi_hba *phba, struct pci_dev *pdev)
{
struct be_ctrl_info *ctrl = &phba->ctrl;
struct be_dma_mem *mbox_mem_alloc = &ctrl->mbox_mem_alloced;
struct be_dma_mem *mbox_mem_align = &ctrl->mbox_mem;
int status = 0;
ctrl->pdev = pdev;
status = beiscsi_map_pci_bars(phba, pdev);
if (status)
return status;
mbox_mem_alloc->size = sizeof(struct be_mcc_mailbox) + 16;
mbox_mem_alloc->va = dma_alloc_coherent(&pdev->dev,
mbox_mem_alloc->size, &mbox_mem_alloc->dma, GFP_KERNEL);
if (!mbox_mem_alloc->va) {
beiscsi_unmap_pci_function(phba);
return -ENOMEM;
}
mbox_mem_align->size = sizeof(struct be_mcc_mailbox);
mbox_mem_align->va = PTR_ALIGN(mbox_mem_alloc->va, 16);
mbox_mem_align->dma = PTR_ALIGN(mbox_mem_alloc->dma, 16);
memset(mbox_mem_align->va, 0, sizeof(struct be_mcc_mailbox));
mutex_init(&ctrl->mbox_lock);
spin_lock_init(&phba->ctrl.mcc_lock);
return status;
}
/**
* beiscsi_get_params()- Set the config paramters
* @phba: ptr device priv structure
**/
static void beiscsi_get_params(struct beiscsi_hba *phba)
{
uint32_t total_cid_count = 0;
uint32_t total_icd_count = 0;
uint8_t ulp_num = 0;
total_cid_count = BEISCSI_GET_CID_COUNT(phba, BEISCSI_ULP0) +
BEISCSI_GET_CID_COUNT(phba, BEISCSI_ULP1);
for (ulp_num = 0; ulp_num < BEISCSI_ULP_COUNT; ulp_num++) {
uint32_t align_mask = 0;
uint32_t icd_post_per_page = 0;
uint32_t icd_count_unavailable = 0;
uint32_t icd_start = 0, icd_count = 0;
uint32_t icd_start_align = 0, icd_count_align = 0;
if (test_bit(ulp_num, &phba->fw_config.ulp_supported)) {
icd_start = phba->fw_config.iscsi_icd_start[ulp_num];
icd_count = phba->fw_config.iscsi_icd_count[ulp_num];
/* Get ICD count that can be posted on each page */
icd_post_per_page = (PAGE_SIZE / (BE2_SGE *
sizeof(struct iscsi_sge)));
align_mask = (icd_post_per_page - 1);
/* Check if icd_start is aligned ICD per page posting */
if (icd_start % icd_post_per_page) {
icd_start_align = ((icd_start +
icd_post_per_page) &
~(align_mask));
phba->fw_config.
iscsi_icd_start[ulp_num] =
icd_start_align;
}
icd_count_align = (icd_count & ~align_mask);
/* ICD discarded in the process of alignment */
if (icd_start_align)
icd_count_unavailable = ((icd_start_align -
icd_start) +
(icd_count -
icd_count_align));
/* Updated ICD count available */
phba->fw_config.iscsi_icd_count[ulp_num] = (icd_count -
icd_count_unavailable);
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_INIT,
"BM_%d : Aligned ICD values\n"
"\t ICD Start : %d\n"
"\t ICD Count : %d\n"
"\t ICD Discarded : %d\n",
phba->fw_config.
iscsi_icd_start[ulp_num],
phba->fw_config.
iscsi_icd_count[ulp_num],
icd_count_unavailable);
break;
}
}
total_icd_count = phba->fw_config.iscsi_icd_count[ulp_num];
phba->params.ios_per_ctrl = (total_icd_count -
(total_cid_count +
BE2_TMFS + BE2_NOPOUT_REQ));
phba->params.cxns_per_ctrl = total_cid_count;
phba->params.icds_per_ctrl = total_icd_count;
phba->params.num_sge_per_io = BE2_SGE;
phba->params.defpdu_hdr_sz = BE2_DEFPDU_HDR_SZ;
phba->params.defpdu_data_sz = BE2_DEFPDU_DATA_SZ;
phba->params.num_eq_entries = 1024;
phba->params.num_cq_entries = 1024;
phba->params.wrbs_per_cxn = 256;
}
static void hwi_ring_eq_db(struct beiscsi_hba *phba,
unsigned int id, unsigned int clr_interrupt,
unsigned int num_processed,
unsigned char rearm, unsigned char event)
{
u32 val = 0;
if (rearm)
val |= 1 << DB_EQ_REARM_SHIFT;
if (clr_interrupt)
val |= 1 << DB_EQ_CLR_SHIFT;
if (event)
val |= 1 << DB_EQ_EVNT_SHIFT;
val |= num_processed << DB_EQ_NUM_POPPED_SHIFT;
/* Setting lower order EQ_ID Bits */
val |= (id & DB_EQ_RING_ID_LOW_MASK);
/* Setting Higher order EQ_ID Bits */
val |= (((id >> DB_EQ_HIGH_FEILD_SHIFT) &
DB_EQ_RING_ID_HIGH_MASK)
<< DB_EQ_HIGH_SET_SHIFT);
iowrite32(val, phba->db_va + DB_EQ_OFFSET);
}
/**
* be_isr_mcc - The isr routine of the driver.
* @irq: Not used
* @dev_id: Pointer to host adapter structure
*/
static irqreturn_t be_isr_mcc(int irq, void *dev_id)
{
struct beiscsi_hba *phba;
struct be_eq_entry *eqe;
struct be_queue_info *eq;
struct be_queue_info *mcc;
unsigned int mcc_events;
struct be_eq_obj *pbe_eq;
pbe_eq = dev_id;
eq = &pbe_eq->q;
phba = pbe_eq->phba;
mcc = &phba->ctrl.mcc_obj.cq;
eqe = queue_tail_node(eq);
mcc_events = 0;
while (eqe->dw[offsetof(struct amap_eq_entry, valid) / 32]
& EQE_VALID_MASK) {
if (((eqe->dw[offsetof(struct amap_eq_entry,
resource_id) / 32] &
EQE_RESID_MASK) >> 16) == mcc->id) {
mcc_events++;
}
AMAP_SET_BITS(struct amap_eq_entry, valid, eqe, 0);
queue_tail_inc(eq);
eqe = queue_tail_node(eq);
}
if (mcc_events) {
queue_work(phba->wq, &pbe_eq->mcc_work);
hwi_ring_eq_db(phba, eq->id, 1, mcc_events, 1, 1);
}
return IRQ_HANDLED;
}
/**
* be_isr_msix - The isr routine of the driver.
* @irq: Not used
* @dev_id: Pointer to host adapter structure
*/
static irqreturn_t be_isr_msix(int irq, void *dev_id)
{
struct beiscsi_hba *phba;
struct be_queue_info *eq;
struct be_eq_obj *pbe_eq;
pbe_eq = dev_id;
eq = &pbe_eq->q;
phba = pbe_eq->phba;
/* disable interrupt till iopoll completes */
hwi_ring_eq_db(phba, eq->id, 1, 0, 0, 1);
irq_poll_sched(&pbe_eq->iopoll);
return IRQ_HANDLED;
}
/**
* be_isr - The isr routine of the driver.
* @irq: Not used
* @dev_id: Pointer to host adapter structure
*/
static irqreturn_t be_isr(int irq, void *dev_id)
{
struct beiscsi_hba *phba;
struct hwi_controller *phwi_ctrlr;
struct hwi_context_memory *phwi_context;
struct be_eq_entry *eqe;
struct be_queue_info *eq;
struct be_queue_info *mcc;
unsigned int mcc_events, io_events;
struct be_ctrl_info *ctrl;
struct be_eq_obj *pbe_eq;
int isr, rearm;
phba = dev_id;
ctrl = &phba->ctrl;
isr = ioread32(ctrl->csr + CEV_ISR0_OFFSET +
(PCI_FUNC(ctrl->pdev->devfn) * CEV_ISR_SIZE));
if (!isr)
return IRQ_NONE;
phwi_ctrlr = phba->phwi_ctrlr;
phwi_context = phwi_ctrlr->phwi_ctxt;
pbe_eq = &phwi_context->be_eq[0];
eq = &phwi_context->be_eq[0].q;
mcc = &phba->ctrl.mcc_obj.cq;
eqe = queue_tail_node(eq);
io_events = 0;
mcc_events = 0;
while (eqe->dw[offsetof(struct amap_eq_entry, valid) / 32]
& EQE_VALID_MASK) {
if (((eqe->dw[offsetof(struct amap_eq_entry,
resource_id) / 32] & EQE_RESID_MASK) >> 16) == mcc->id)
mcc_events++;
else
io_events++;
AMAP_SET_BITS(struct amap_eq_entry, valid, eqe, 0);
queue_tail_inc(eq);
eqe = queue_tail_node(eq);
}
if (!io_events && !mcc_events)
return IRQ_NONE;
/* no need to rearm if interrupt is only for IOs */
rearm = 0;
if (mcc_events) {
queue_work(phba->wq, &pbe_eq->mcc_work);
/* rearm for MCCQ */
rearm = 1;
}
if (io_events)
irq_poll_sched(&pbe_eq->iopoll);
hwi_ring_eq_db(phba, eq->id, 0, (io_events + mcc_events), rearm, 1);
return IRQ_HANDLED;
}
static void beiscsi_free_irqs(struct beiscsi_hba *phba)
{
struct hwi_context_memory *phwi_context;
int i;
if (!phba->pcidev->msix_enabled) {
if (phba->pcidev->irq)
free_irq(phba->pcidev->irq, phba);
return;
}
phwi_context = phba->phwi_ctrlr->phwi_ctxt;
for (i = 0; i <= phba->num_cpus; i++) {
free_irq(pci_irq_vector(phba->pcidev, i),
&phwi_context->be_eq[i]);
kfree(phba->msi_name[i]);
}
}
static int beiscsi_init_irqs(struct beiscsi_hba *phba)
{
struct pci_dev *pcidev = phba->pcidev;
struct hwi_controller *phwi_ctrlr;
struct hwi_context_memory *phwi_context;
int ret, i, j;
phwi_ctrlr = phba->phwi_ctrlr;
phwi_context = phwi_ctrlr->phwi_ctxt;
if (pcidev->msix_enabled) {
for (i = 0; i < phba->num_cpus; i++) {
phba->msi_name[i] = kasprintf(GFP_KERNEL,
"beiscsi_%02x_%02x",
phba->shost->host_no, i);
if (!phba->msi_name[i]) {
ret = -ENOMEM;
goto free_msix_irqs;
}
ret = request_irq(pci_irq_vector(pcidev, i),
be_isr_msix, 0, phba->msi_name[i],
&phwi_context->be_eq[i]);
if (ret) {
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_INIT,
"BM_%d : beiscsi_init_irqs-Failed to"
"register msix for i = %d\n",
i);
kfree(phba->msi_name[i]);
goto free_msix_irqs;
}
}
phba->msi_name[i] = kasprintf(GFP_KERNEL, "beiscsi_mcc_%02x",
phba->shost->host_no);
if (!phba->msi_name[i]) {
ret = -ENOMEM;
goto free_msix_irqs;
}
ret = request_irq(pci_irq_vector(pcidev, i), be_isr_mcc, 0,
phba->msi_name[i], &phwi_context->be_eq[i]);
if (ret) {
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_INIT ,
"BM_%d : beiscsi_init_irqs-"
"Failed to register beiscsi_msix_mcc\n");
kfree(phba->msi_name[i]);
goto free_msix_irqs;
}
} else {
ret = request_irq(pcidev->irq, be_isr, IRQF_SHARED,
"beiscsi", phba);
if (ret) {
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_INIT,
"BM_%d : beiscsi_init_irqs-"
"Failed to register irq\\n");
return ret;
}
}
return 0;
free_msix_irqs:
for (j = i - 1; j >= 0; j--) {
free_irq(pci_irq_vector(pcidev, i), &phwi_context->be_eq[j]);
kfree(phba->msi_name[j]);
}
return ret;
}
void hwi_ring_cq_db(struct beiscsi_hba *phba,
unsigned int id, unsigned int num_processed,
unsigned char rearm)
{
u32 val = 0;
if (rearm)
val |= 1 << DB_CQ_REARM_SHIFT;
val |= num_processed << DB_CQ_NUM_POPPED_SHIFT;
/* Setting lower order CQ_ID Bits */
val |= (id & DB_CQ_RING_ID_LOW_MASK);
/* Setting Higher order CQ_ID Bits */
val |= (((id >> DB_CQ_HIGH_FEILD_SHIFT) &
DB_CQ_RING_ID_HIGH_MASK)
<< DB_CQ_HIGH_SET_SHIFT);
iowrite32(val, phba->db_va + DB_CQ_OFFSET);
}
static struct sgl_handle *alloc_io_sgl_handle(struct beiscsi_hba *phba)
{
struct sgl_handle *psgl_handle;
unsigned long flags;
spin_lock_irqsave(&phba->io_sgl_lock, flags);
if (phba->io_sgl_hndl_avbl) {
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_IO,
"BM_%d : In alloc_io_sgl_handle,"
" io_sgl_alloc_index=%d\n",
phba->io_sgl_alloc_index);
psgl_handle = phba->io_sgl_hndl_base[phba->
io_sgl_alloc_index];
phba->io_sgl_hndl_base[phba->io_sgl_alloc_index] = NULL;
phba->io_sgl_hndl_avbl--;
if (phba->io_sgl_alloc_index == (phba->params.
ios_per_ctrl - 1))
phba->io_sgl_alloc_index = 0;
else
phba->io_sgl_alloc_index++;
} else
psgl_handle = NULL;
spin_unlock_irqrestore(&phba->io_sgl_lock, flags);
return psgl_handle;
}
static void
free_io_sgl_handle(struct beiscsi_hba *phba, struct sgl_handle *psgl_handle)
{
unsigned long flags;
spin_lock_irqsave(&phba->io_sgl_lock, flags);
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_IO,
"BM_%d : In free_,io_sgl_free_index=%d\n",
phba->io_sgl_free_index);
if (phba->io_sgl_hndl_base[phba->io_sgl_free_index]) {
/*
* this can happen if clean_task is called on a task that
* failed in xmit_task or alloc_pdu.
*/
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_IO,
"BM_%d : Double Free in IO SGL io_sgl_free_index=%d, value there=%p\n",
phba->io_sgl_free_index,
phba->io_sgl_hndl_base[phba->io_sgl_free_index]);
spin_unlock_irqrestore(&phba->io_sgl_lock, flags);
return;
}
phba->io_sgl_hndl_base[phba->io_sgl_free_index] = psgl_handle;
phba->io_sgl_hndl_avbl++;
if (phba->io_sgl_free_index == (phba->params.ios_per_ctrl - 1))
phba->io_sgl_free_index = 0;
else
phba->io_sgl_free_index++;
spin_unlock_irqrestore(&phba->io_sgl_lock, flags);
}
static inline struct wrb_handle *
beiscsi_get_wrb_handle(struct hwi_wrb_context *pwrb_context,
unsigned int wrbs_per_cxn)
{
struct wrb_handle *pwrb_handle;
unsigned long flags;
spin_lock_irqsave(&pwrb_context->wrb_lock, flags);
if (!pwrb_context->wrb_handles_available) {
spin_unlock_irqrestore(&pwrb_context->wrb_lock, flags);
return NULL;
}
pwrb_handle = pwrb_context->pwrb_handle_base[pwrb_context->alloc_index];
pwrb_context->wrb_handles_available--;
if (pwrb_context->alloc_index == (wrbs_per_cxn - 1))
pwrb_context->alloc_index = 0;
else
pwrb_context->alloc_index++;
spin_unlock_irqrestore(&pwrb_context->wrb_lock, flags);
if (pwrb_handle)
memset(pwrb_handle->pwrb, 0, sizeof(*pwrb_handle->pwrb));
return pwrb_handle;
}
/**
* alloc_wrb_handle - To allocate a wrb handle
* @phba: The hba pointer
* @cid: The cid to use for allocation
* @pcontext: ptr to ptr to wrb context
*
* This happens under session_lock until submission to chip
*/
struct wrb_handle *alloc_wrb_handle(struct beiscsi_hba *phba, unsigned int cid,
struct hwi_wrb_context **pcontext)
{
struct hwi_wrb_context *pwrb_context;
struct hwi_controller *phwi_ctrlr;
uint16_t cri_index = BE_GET_CRI_FROM_CID(cid);
phwi_ctrlr = phba->phwi_ctrlr;
pwrb_context = &phwi_ctrlr->wrb_context[cri_index];
/* return the context address */
*pcontext = pwrb_context;
return beiscsi_get_wrb_handle(pwrb_context, phba->params.wrbs_per_cxn);
}
static inline void
beiscsi_put_wrb_handle(struct hwi_wrb_context *pwrb_context,
struct wrb_handle *pwrb_handle,