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qedi_main.c
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qedi_main.c
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// SPDX-License-Identifier: GPL-2.0-only
/*
* QLogic iSCSI Offload Driver
* Copyright (c) 2016 Cavium Inc.
*/
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/if_arp.h>
#include <scsi/iscsi_if.h>
#include <linux/inet.h>
#include <net/arp.h>
#include <linux/list.h>
#include <linux/kthread.h>
#include <linux/mm.h>
#include <linux/if_vlan.h>
#include <linux/cpu.h>
#include <linux/iscsi_boot_sysfs.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi.h>
#include "qedi.h"
#include "qedi_gbl.h"
#include "qedi_iscsi.h"
static uint qedi_qed_debug;
module_param(qedi_qed_debug, uint, 0644);
MODULE_PARM_DESC(qedi_qed_debug, " QED debug level 0 (default)");
static uint qedi_fw_debug;
module_param(qedi_fw_debug, uint, 0644);
MODULE_PARM_DESC(qedi_fw_debug, " Firmware debug level 0(default) to 3");
uint qedi_dbg_log = QEDI_LOG_WARN | QEDI_LOG_SCSI_TM;
module_param(qedi_dbg_log, uint, 0644);
MODULE_PARM_DESC(qedi_dbg_log, " Default debug level");
uint qedi_io_tracing;
module_param(qedi_io_tracing, uint, 0644);
MODULE_PARM_DESC(qedi_io_tracing,
" Enable logging of SCSI requests/completions into trace buffer. (default off).");
static uint qedi_ll2_buf_size = 0x400;
module_param(qedi_ll2_buf_size, uint, 0644);
MODULE_PARM_DESC(qedi_ll2_buf_size,
"parameter to set ping packet size, default - 0x400, Jumbo packets - 0x2400.");
static uint qedi_flags_override;
module_param(qedi_flags_override, uint, 0644);
MODULE_PARM_DESC(qedi_flags_override, "Disable/Enable MFW error flags bits action.");
const struct qed_iscsi_ops *qedi_ops;
static struct scsi_transport_template *qedi_scsi_transport;
static struct pci_driver qedi_pci_driver;
static DEFINE_PER_CPU(struct qedi_percpu_s, qedi_percpu);
static LIST_HEAD(qedi_udev_list);
/* Static function declaration */
static int qedi_alloc_global_queues(struct qedi_ctx *qedi);
static void qedi_free_global_queues(struct qedi_ctx *qedi);
static struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid);
static void qedi_reset_uio_rings(struct qedi_uio_dev *udev);
static void qedi_ll2_free_skbs(struct qedi_ctx *qedi);
static struct nvm_iscsi_block *qedi_get_nvram_block(struct qedi_ctx *qedi);
static void qedi_recovery_handler(struct work_struct *work);
static void qedi_schedule_hw_err_handler(void *dev,
enum qed_hw_err_type err_type);
static int qedi_iscsi_event_cb(void *context, u8 fw_event_code, void *fw_handle)
{
struct qedi_ctx *qedi;
struct qedi_endpoint *qedi_ep;
struct iscsi_eqe_data *data;
int rval = 0;
if (!context || !fw_handle) {
QEDI_ERR(NULL, "Recv event with ctx NULL\n");
return -EINVAL;
}
qedi = (struct qedi_ctx *)context;
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
"Recv Event %d fw_handle %p\n", fw_event_code, fw_handle);
data = (struct iscsi_eqe_data *)fw_handle;
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
"icid=0x%x conn_id=0x%x err-code=0x%x error-pdu-opcode-reserved=0x%x\n",
data->icid, data->conn_id, data->error_code,
data->error_pdu_opcode_reserved);
qedi_ep = qedi->ep_tbl[data->icid];
if (!qedi_ep) {
QEDI_WARN(&qedi->dbg_ctx,
"Cannot process event, ep already disconnected, cid=0x%x\n",
data->icid);
WARN_ON(1);
return -ENODEV;
}
switch (fw_event_code) {
case ISCSI_EVENT_TYPE_ASYN_CONNECT_COMPLETE:
if (qedi_ep->state == EP_STATE_OFLDCONN_START)
qedi_ep->state = EP_STATE_OFLDCONN_COMPL;
wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
break;
case ISCSI_EVENT_TYPE_ASYN_TERMINATE_DONE:
qedi_ep->state = EP_STATE_DISCONN_COMPL;
wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
break;
case ISCSI_EVENT_TYPE_ISCSI_CONN_ERROR:
qedi_process_iscsi_error(qedi_ep, data);
break;
case ISCSI_EVENT_TYPE_ASYN_ABORT_RCVD:
case ISCSI_EVENT_TYPE_ASYN_SYN_RCVD:
case ISCSI_EVENT_TYPE_ASYN_MAX_RT_TIME:
case ISCSI_EVENT_TYPE_ASYN_MAX_RT_CNT:
case ISCSI_EVENT_TYPE_ASYN_MAX_KA_PROBES_CNT:
case ISCSI_EVENT_TYPE_ASYN_FIN_WAIT2:
case ISCSI_EVENT_TYPE_TCP_CONN_ERROR:
qedi_process_tcp_error(qedi_ep, data);
break;
default:
QEDI_ERR(&qedi->dbg_ctx, "Recv Unknown Event %u\n",
fw_event_code);
}
return rval;
}
static int qedi_uio_open(struct uio_info *uinfo, struct inode *inode)
{
struct qedi_uio_dev *udev = uinfo->priv;
struct qedi_ctx *qedi = udev->qedi;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
if (udev->uio_dev != -1)
return -EBUSY;
rtnl_lock();
udev->uio_dev = iminor(inode);
qedi_reset_uio_rings(udev);
set_bit(UIO_DEV_OPENED, &qedi->flags);
rtnl_unlock();
return 0;
}
static int qedi_uio_close(struct uio_info *uinfo, struct inode *inode)
{
struct qedi_uio_dev *udev = uinfo->priv;
struct qedi_ctx *qedi = udev->qedi;
udev->uio_dev = -1;
clear_bit(UIO_DEV_OPENED, &qedi->flags);
qedi_ll2_free_skbs(qedi);
return 0;
}
static void __qedi_free_uio_rings(struct qedi_uio_dev *udev)
{
if (udev->uctrl) {
free_page((unsigned long)udev->uctrl);
udev->uctrl = NULL;
}
if (udev->ll2_ring) {
free_page((unsigned long)udev->ll2_ring);
udev->ll2_ring = NULL;
}
if (udev->ll2_buf) {
free_pages((unsigned long)udev->ll2_buf, 2);
udev->ll2_buf = NULL;
}
}
static void __qedi_free_uio(struct qedi_uio_dev *udev)
{
uio_unregister_device(&udev->qedi_uinfo);
__qedi_free_uio_rings(udev);
pci_dev_put(udev->pdev);
kfree(udev);
}
static void qedi_free_uio(struct qedi_uio_dev *udev)
{
if (!udev)
return;
list_del_init(&udev->list);
__qedi_free_uio(udev);
}
static void qedi_reset_uio_rings(struct qedi_uio_dev *udev)
{
struct qedi_ctx *qedi = NULL;
struct qedi_uio_ctrl *uctrl = NULL;
qedi = udev->qedi;
uctrl = udev->uctrl;
spin_lock_bh(&qedi->ll2_lock);
uctrl->host_rx_cons = 0;
uctrl->hw_rx_prod = 0;
uctrl->hw_rx_bd_prod = 0;
uctrl->host_rx_bd_cons = 0;
memset(udev->ll2_ring, 0, udev->ll2_ring_size);
memset(udev->ll2_buf, 0, udev->ll2_buf_size);
spin_unlock_bh(&qedi->ll2_lock);
}
static int __qedi_alloc_uio_rings(struct qedi_uio_dev *udev)
{
int rc = 0;
if (udev->ll2_ring || udev->ll2_buf)
return rc;
/* Memory for control area. */
udev->uctrl = (void *)get_zeroed_page(GFP_KERNEL);
if (!udev->uctrl)
return -ENOMEM;
/* Allocating memory for LL2 ring */
udev->ll2_ring_size = QEDI_PAGE_SIZE;
udev->ll2_ring = (void *)get_zeroed_page(GFP_KERNEL | __GFP_COMP);
if (!udev->ll2_ring) {
rc = -ENOMEM;
goto exit_alloc_ring;
}
/* Allocating memory for Tx/Rx pkt buffer */
udev->ll2_buf_size = TX_RX_RING * qedi_ll2_buf_size;
udev->ll2_buf_size = QEDI_PAGE_ALIGN(udev->ll2_buf_size);
udev->ll2_buf = (void *)__get_free_pages(GFP_KERNEL | __GFP_COMP |
__GFP_ZERO, 2);
if (!udev->ll2_buf) {
rc = -ENOMEM;
goto exit_alloc_buf;
}
return rc;
exit_alloc_buf:
free_page((unsigned long)udev->ll2_ring);
udev->ll2_ring = NULL;
exit_alloc_ring:
return rc;
}
static int qedi_alloc_uio_rings(struct qedi_ctx *qedi)
{
struct qedi_uio_dev *udev = NULL;
int rc = 0;
list_for_each_entry(udev, &qedi_udev_list, list) {
if (udev->pdev == qedi->pdev) {
udev->qedi = qedi;
if (__qedi_alloc_uio_rings(udev)) {
udev->qedi = NULL;
return -ENOMEM;
}
qedi->udev = udev;
return 0;
}
}
udev = kzalloc(sizeof(*udev), GFP_KERNEL);
if (!udev) {
rc = -ENOMEM;
goto err_udev;
}
udev->uio_dev = -1;
udev->qedi = qedi;
udev->pdev = qedi->pdev;
rc = __qedi_alloc_uio_rings(udev);
if (rc)
goto err_uctrl;
list_add(&udev->list, &qedi_udev_list);
pci_dev_get(udev->pdev);
qedi->udev = udev;
udev->tx_pkt = udev->ll2_buf;
udev->rx_pkt = udev->ll2_buf + qedi_ll2_buf_size;
return 0;
err_uctrl:
kfree(udev);
err_udev:
return -ENOMEM;
}
static int qedi_init_uio(struct qedi_ctx *qedi)
{
struct qedi_uio_dev *udev = qedi->udev;
struct uio_info *uinfo;
int ret = 0;
if (!udev)
return -ENOMEM;
uinfo = &udev->qedi_uinfo;
uinfo->mem[0].addr = (unsigned long)udev->uctrl;
uinfo->mem[0].size = sizeof(struct qedi_uio_ctrl);
uinfo->mem[0].memtype = UIO_MEM_LOGICAL;
uinfo->mem[1].addr = (unsigned long)udev->ll2_ring;
uinfo->mem[1].size = udev->ll2_ring_size;
uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
uinfo->mem[2].addr = (unsigned long)udev->ll2_buf;
uinfo->mem[2].size = udev->ll2_buf_size;
uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
uinfo->name = "qedi_uio";
uinfo->version = QEDI_MODULE_VERSION;
uinfo->irq = UIO_IRQ_CUSTOM;
uinfo->open = qedi_uio_open;
uinfo->release = qedi_uio_close;
if (udev->uio_dev == -1) {
if (!uinfo->priv) {
uinfo->priv = udev;
ret = uio_register_device(&udev->pdev->dev, uinfo);
if (ret) {
QEDI_ERR(&qedi->dbg_ctx,
"UIO registration failed\n");
}
}
}
return ret;
}
static int qedi_alloc_and_init_sb(struct qedi_ctx *qedi,
struct qed_sb_info *sb_info, u16 sb_id)
{
struct status_block_e4 *sb_virt;
dma_addr_t sb_phys;
int ret;
sb_virt = dma_alloc_coherent(&qedi->pdev->dev,
sizeof(struct status_block_e4), &sb_phys,
GFP_KERNEL);
if (!sb_virt) {
QEDI_ERR(&qedi->dbg_ctx,
"Status block allocation failed for id = %d.\n",
sb_id);
return -ENOMEM;
}
ret = qedi_ops->common->sb_init(qedi->cdev, sb_info, sb_virt, sb_phys,
sb_id, QED_SB_TYPE_STORAGE);
if (ret) {
QEDI_ERR(&qedi->dbg_ctx,
"Status block initialization failed for id = %d.\n",
sb_id);
return ret;
}
return 0;
}
static void qedi_free_sb(struct qedi_ctx *qedi)
{
struct qed_sb_info *sb_info;
int id;
for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
sb_info = &qedi->sb_array[id];
if (sb_info->sb_virt)
dma_free_coherent(&qedi->pdev->dev,
sizeof(*sb_info->sb_virt),
(void *)sb_info->sb_virt,
sb_info->sb_phys);
}
}
static void qedi_free_fp(struct qedi_ctx *qedi)
{
kfree(qedi->fp_array);
kfree(qedi->sb_array);
}
static void qedi_destroy_fp(struct qedi_ctx *qedi)
{
qedi_free_sb(qedi);
qedi_free_fp(qedi);
}
static int qedi_alloc_fp(struct qedi_ctx *qedi)
{
int ret = 0;
qedi->fp_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
sizeof(struct qedi_fastpath), GFP_KERNEL);
if (!qedi->fp_array) {
QEDI_ERR(&qedi->dbg_ctx,
"fastpath fp array allocation failed.\n");
return -ENOMEM;
}
qedi->sb_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
sizeof(struct qed_sb_info), GFP_KERNEL);
if (!qedi->sb_array) {
QEDI_ERR(&qedi->dbg_ctx,
"fastpath sb array allocation failed.\n");
ret = -ENOMEM;
goto free_fp;
}
return ret;
free_fp:
qedi_free_fp(qedi);
return ret;
}
static void qedi_int_fp(struct qedi_ctx *qedi)
{
struct qedi_fastpath *fp;
int id;
memset(qedi->fp_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
sizeof(*qedi->fp_array));
memset(qedi->sb_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
sizeof(*qedi->sb_array));
for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
fp = &qedi->fp_array[id];
fp->sb_info = &qedi->sb_array[id];
fp->sb_id = id;
fp->qedi = qedi;
snprintf(fp->name, sizeof(fp->name), "%s-fp-%d",
"qedi", id);
/* fp_array[i] ---- irq cookie
* So init data which is needed in int ctx
*/
}
}
static int qedi_prepare_fp(struct qedi_ctx *qedi)
{
struct qedi_fastpath *fp;
int id, ret = 0;
ret = qedi_alloc_fp(qedi);
if (ret)
goto err;
qedi_int_fp(qedi);
for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
fp = &qedi->fp_array[id];
ret = qedi_alloc_and_init_sb(qedi, fp->sb_info, fp->sb_id);
if (ret) {
QEDI_ERR(&qedi->dbg_ctx,
"SB allocation and initialization failed.\n");
ret = -EIO;
goto err_init;
}
}
return 0;
err_init:
qedi_free_sb(qedi);
qedi_free_fp(qedi);
err:
return ret;
}
static int qedi_setup_cid_que(struct qedi_ctx *qedi)
{
int i;
qedi->cid_que.cid_que_base = kmalloc_array(qedi->max_active_conns,
sizeof(u32), GFP_KERNEL);
if (!qedi->cid_que.cid_que_base)
return -ENOMEM;
qedi->cid_que.conn_cid_tbl = kmalloc_array(qedi->max_active_conns,
sizeof(struct qedi_conn *),
GFP_KERNEL);
if (!qedi->cid_que.conn_cid_tbl) {
kfree(qedi->cid_que.cid_que_base);
qedi->cid_que.cid_que_base = NULL;
return -ENOMEM;
}
qedi->cid_que.cid_que = (u32 *)qedi->cid_que.cid_que_base;
qedi->cid_que.cid_q_prod_idx = 0;
qedi->cid_que.cid_q_cons_idx = 0;
qedi->cid_que.cid_q_max_idx = qedi->max_active_conns;
qedi->cid_que.cid_free_cnt = qedi->max_active_conns;
for (i = 0; i < qedi->max_active_conns; i++) {
qedi->cid_que.cid_que[i] = i;
qedi->cid_que.conn_cid_tbl[i] = NULL;
}
return 0;
}
static void qedi_release_cid_que(struct qedi_ctx *qedi)
{
kfree(qedi->cid_que.cid_que_base);
qedi->cid_que.cid_que_base = NULL;
kfree(qedi->cid_que.conn_cid_tbl);
qedi->cid_que.conn_cid_tbl = NULL;
}
static int qedi_init_id_tbl(struct qedi_portid_tbl *id_tbl, u16 size,
u16 start_id, u16 next)
{
id_tbl->start = start_id;
id_tbl->max = size;
id_tbl->next = next;
spin_lock_init(&id_tbl->lock);
id_tbl->table = kcalloc(BITS_TO_LONGS(size), sizeof(long), GFP_KERNEL);
if (!id_tbl->table)
return -ENOMEM;
return 0;
}
static void qedi_free_id_tbl(struct qedi_portid_tbl *id_tbl)
{
kfree(id_tbl->table);
id_tbl->table = NULL;
}
int qedi_alloc_id(struct qedi_portid_tbl *id_tbl, u16 id)
{
int ret = -1;
id -= id_tbl->start;
if (id >= id_tbl->max)
return ret;
spin_lock(&id_tbl->lock);
if (!test_bit(id, id_tbl->table)) {
set_bit(id, id_tbl->table);
ret = 0;
}
spin_unlock(&id_tbl->lock);
return ret;
}
u16 qedi_alloc_new_id(struct qedi_portid_tbl *id_tbl)
{
u16 id;
spin_lock(&id_tbl->lock);
id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next);
if (id >= id_tbl->max) {
id = QEDI_LOCAL_PORT_INVALID;
if (id_tbl->next != 0) {
id = find_first_zero_bit(id_tbl->table, id_tbl->next);
if (id >= id_tbl->next)
id = QEDI_LOCAL_PORT_INVALID;
}
}
if (id < id_tbl->max) {
set_bit(id, id_tbl->table);
id_tbl->next = (id + 1) & (id_tbl->max - 1);
id += id_tbl->start;
}
spin_unlock(&id_tbl->lock);
return id;
}
void qedi_free_id(struct qedi_portid_tbl *id_tbl, u16 id)
{
if (id == QEDI_LOCAL_PORT_INVALID)
return;
id -= id_tbl->start;
if (id >= id_tbl->max)
return;
clear_bit(id, id_tbl->table);
}
static void qedi_cm_free_mem(struct qedi_ctx *qedi)
{
kfree(qedi->ep_tbl);
qedi->ep_tbl = NULL;
qedi_free_id_tbl(&qedi->lcl_port_tbl);
}
static int qedi_cm_alloc_mem(struct qedi_ctx *qedi)
{
u16 port_id;
qedi->ep_tbl = kzalloc((qedi->max_active_conns *
sizeof(struct qedi_endpoint *)), GFP_KERNEL);
if (!qedi->ep_tbl)
return -ENOMEM;
port_id = prandom_u32() % QEDI_LOCAL_PORT_RANGE;
if (qedi_init_id_tbl(&qedi->lcl_port_tbl, QEDI_LOCAL_PORT_RANGE,
QEDI_LOCAL_PORT_MIN, port_id)) {
qedi_cm_free_mem(qedi);
return -ENOMEM;
}
return 0;
}
static struct qedi_ctx *qedi_host_alloc(struct pci_dev *pdev)
{
struct Scsi_Host *shost;
struct qedi_ctx *qedi = NULL;
shost = iscsi_host_alloc(&qedi_host_template,
sizeof(struct qedi_ctx), 0);
if (!shost) {
QEDI_ERR(NULL, "Could not allocate shost\n");
goto exit_setup_shost;
}
shost->max_id = QEDI_MAX_ISCSI_CONNS_PER_HBA - 1;
shost->max_channel = 0;
shost->max_lun = ~0;
shost->max_cmd_len = 16;
shost->transportt = qedi_scsi_transport;
qedi = iscsi_host_priv(shost);
memset(qedi, 0, sizeof(*qedi));
qedi->shost = shost;
qedi->dbg_ctx.host_no = shost->host_no;
qedi->pdev = pdev;
qedi->dbg_ctx.pdev = pdev;
qedi->max_active_conns = ISCSI_MAX_SESS_PER_HBA;
qedi->max_sqes = QEDI_SQ_SIZE;
shost->nr_hw_queues = MIN_NUM_CPUS_MSIX(qedi);
pci_set_drvdata(pdev, qedi);
exit_setup_shost:
return qedi;
}
static int qedi_ll2_rx(void *cookie, struct sk_buff *skb, u32 arg1, u32 arg2)
{
struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
struct skb_work_list *work;
struct ethhdr *eh;
if (!qedi) {
QEDI_ERR(NULL, "qedi is NULL\n");
return -1;
}
if (!test_bit(UIO_DEV_OPENED, &qedi->flags)) {
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UIO,
"UIO DEV is not opened\n");
kfree_skb(skb);
return 0;
}
eh = (struct ethhdr *)skb->data;
/* Undo VLAN encapsulation */
if (eh->h_proto == htons(ETH_P_8021Q)) {
memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);
eh = (struct ethhdr *)skb_pull(skb, VLAN_HLEN);
skb_reset_mac_header(skb);
}
/* Filter out non FIP/FCoE frames here to free them faster */
if (eh->h_proto != htons(ETH_P_ARP) &&
eh->h_proto != htons(ETH_P_IP) &&
eh->h_proto != htons(ETH_P_IPV6)) {
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,
"Dropping frame ethertype [0x%x] len [0x%x].\n",
eh->h_proto, skb->len);
kfree_skb(skb);
return 0;
}
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,
"Allowed frame ethertype [0x%x] len [0x%x].\n",
eh->h_proto, skb->len);
work = kzalloc(sizeof(*work), GFP_ATOMIC);
if (!work) {
QEDI_WARN(&qedi->dbg_ctx,
"Could not allocate work so dropping frame.\n");
kfree_skb(skb);
return 0;
}
INIT_LIST_HEAD(&work->list);
work->skb = skb;
if (skb_vlan_tag_present(skb))
work->vlan_id = skb_vlan_tag_get(skb);
if (work->vlan_id)
__vlan_insert_tag(work->skb, htons(ETH_P_8021Q), work->vlan_id);
spin_lock_bh(&qedi->ll2_lock);
list_add_tail(&work->list, &qedi->ll2_skb_list);
spin_unlock_bh(&qedi->ll2_lock);
wake_up_process(qedi->ll2_recv_thread);
return 0;
}
/* map this skb to iscsiuio mmaped region */
static int qedi_ll2_process_skb(struct qedi_ctx *qedi, struct sk_buff *skb,
u16 vlan_id)
{
struct qedi_uio_dev *udev = NULL;
struct qedi_uio_ctrl *uctrl = NULL;
struct qedi_rx_bd rxbd;
struct qedi_rx_bd *p_rxbd;
u32 rx_bd_prod;
void *pkt;
int len = 0;
u32 prod;
if (!qedi) {
QEDI_ERR(NULL, "qedi is NULL\n");
return -1;
}
udev = qedi->udev;
uctrl = udev->uctrl;
++uctrl->hw_rx_prod_cnt;
prod = (uctrl->hw_rx_prod + 1) % RX_RING;
pkt = udev->rx_pkt + (prod * qedi_ll2_buf_size);
len = min_t(u32, skb->len, (u32)qedi_ll2_buf_size);
memcpy(pkt, skb->data, len);
memset(&rxbd, 0, sizeof(rxbd));
rxbd.rx_pkt_index = prod;
rxbd.rx_pkt_len = len;
rxbd.vlan_id = vlan_id;
uctrl->hw_rx_bd_prod = (uctrl->hw_rx_bd_prod + 1) % QEDI_NUM_RX_BD;
rx_bd_prod = uctrl->hw_rx_bd_prod;
p_rxbd = (struct qedi_rx_bd *)udev->ll2_ring;
p_rxbd += rx_bd_prod;
memcpy(p_rxbd, &rxbd, sizeof(rxbd));
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,
"hw_rx_prod [%d] prod [%d] hw_rx_bd_prod [%d] rx_pkt_idx [%d] rx_len [%d].\n",
uctrl->hw_rx_prod, prod, uctrl->hw_rx_bd_prod,
rxbd.rx_pkt_index, rxbd.rx_pkt_len);
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_LL2,
"host_rx_cons [%d] hw_rx_bd_cons [%d].\n",
uctrl->host_rx_cons, uctrl->host_rx_bd_cons);
uctrl->hw_rx_prod = prod;
/* notify the iscsiuio about new packet */
uio_event_notify(&udev->qedi_uinfo);
return 0;
}
static void qedi_ll2_free_skbs(struct qedi_ctx *qedi)
{
struct skb_work_list *work, *work_tmp;
spin_lock_bh(&qedi->ll2_lock);
list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list, list) {
list_del(&work->list);
kfree_skb(work->skb);
kfree(work);
}
spin_unlock_bh(&qedi->ll2_lock);
}
static int qedi_ll2_recv_thread(void *arg)
{
struct qedi_ctx *qedi = (struct qedi_ctx *)arg;
struct skb_work_list *work, *work_tmp;
set_user_nice(current, -20);
while (!kthread_should_stop()) {
spin_lock_bh(&qedi->ll2_lock);
list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list,
list) {
list_del(&work->list);
qedi_ll2_process_skb(qedi, work->skb, work->vlan_id);
kfree_skb(work->skb);
kfree(work);
}
set_current_state(TASK_INTERRUPTIBLE);
spin_unlock_bh(&qedi->ll2_lock);
schedule();
}
__set_current_state(TASK_RUNNING);
return 0;
}
static int qedi_set_iscsi_pf_param(struct qedi_ctx *qedi)
{
u8 num_sq_pages;
u32 log_page_size;
int rval = 0;
num_sq_pages = (MAX_OUTSTANDING_TASKS_PER_CON * 8) / QEDI_PAGE_SIZE;
qedi->num_queues = MIN_NUM_CPUS_MSIX(qedi);
QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
"Number of CQ count is %d\n", qedi->num_queues);
memset(&qedi->pf_params.iscsi_pf_params, 0,
sizeof(qedi->pf_params.iscsi_pf_params));
qedi->p_cpuq = dma_alloc_coherent(&qedi->pdev->dev,
qedi->num_queues * sizeof(struct qedi_glbl_q_params),
&qedi->hw_p_cpuq, GFP_KERNEL);
if (!qedi->p_cpuq) {
QEDI_ERR(&qedi->dbg_ctx, "dma_alloc_coherent fail\n");
rval = -1;
goto err_alloc_mem;
}
rval = qedi_alloc_global_queues(qedi);
if (rval) {
QEDI_ERR(&qedi->dbg_ctx, "Global queue allocation failed.\n");
rval = -1;
goto err_alloc_mem;
}
qedi->pf_params.iscsi_pf_params.num_cons = QEDI_MAX_ISCSI_CONNS_PER_HBA;
qedi->pf_params.iscsi_pf_params.num_tasks = QEDI_MAX_ISCSI_TASK;
qedi->pf_params.iscsi_pf_params.half_way_close_timeout = 10;
qedi->pf_params.iscsi_pf_params.num_sq_pages_in_ring = num_sq_pages;
qedi->pf_params.iscsi_pf_params.num_r2tq_pages_in_ring = num_sq_pages;
qedi->pf_params.iscsi_pf_params.num_uhq_pages_in_ring = num_sq_pages;
qedi->pf_params.iscsi_pf_params.num_queues = qedi->num_queues;
qedi->pf_params.iscsi_pf_params.debug_mode = qedi_fw_debug;
qedi->pf_params.iscsi_pf_params.two_msl_timer = 4000;
qedi->pf_params.iscsi_pf_params.max_fin_rt = 2;
for (log_page_size = 0 ; log_page_size < 32 ; log_page_size++) {
if ((1 << log_page_size) == QEDI_PAGE_SIZE)
break;
}
qedi->pf_params.iscsi_pf_params.log_page_size = log_page_size;
qedi->pf_params.iscsi_pf_params.glbl_q_params_addr =
(u64)qedi->hw_p_cpuq;
/* RQ BDQ initializations.
* rq_num_entries: suggested value for Initiator is 16 (4KB RQ)
* rqe_log_size: 8 for 256B RQE
*/
qedi->pf_params.iscsi_pf_params.rqe_log_size = 8;
/* BDQ address and size */
qedi->pf_params.iscsi_pf_params.bdq_pbl_base_addr[BDQ_ID_RQ] =
qedi->bdq_pbl_list_dma;
qedi->pf_params.iscsi_pf_params.bdq_pbl_num_entries[BDQ_ID_RQ] =
qedi->bdq_pbl_list_num_entries;
qedi->pf_params.iscsi_pf_params.rq_buffer_size = QEDI_BDQ_BUF_SIZE;
/* cq_num_entries: num_tasks + rq_num_entries */
qedi->pf_params.iscsi_pf_params.cq_num_entries = 2048;
qedi->pf_params.iscsi_pf_params.gl_rq_pi = QEDI_PROTO_CQ_PROD_IDX;
qedi->pf_params.iscsi_pf_params.gl_cmd_pi = 1;
err_alloc_mem:
return rval;
}
/* Free DMA coherent memory for array of queue pointers we pass to qed */
static void qedi_free_iscsi_pf_param(struct qedi_ctx *qedi)
{
size_t size = 0;
if (qedi->p_cpuq) {
size = qedi->num_queues * sizeof(struct qedi_glbl_q_params);
dma_free_coherent(&qedi->pdev->dev, size, qedi->p_cpuq,
qedi->hw_p_cpuq);
}
qedi_free_global_queues(qedi);
kfree(qedi->global_queues);
}
static void qedi_get_boot_tgt_info(struct nvm_iscsi_block *block,
struct qedi_boot_target *tgt, u8 index)
{
u32 ipv6_en;
ipv6_en = !!(block->generic.ctrl_flags &
NVM_ISCSI_CFG_GEN_IPV6_ENABLED);
snprintf(tgt->iscsi_name, sizeof(tgt->iscsi_name), "%s",
block->target[index].target_name.byte);
tgt->ipv6_en = ipv6_en;
if (ipv6_en)
snprintf(tgt->ip_addr, IPV6_LEN, "%pI6\n",
block->target[index].ipv6_addr.byte);
else
snprintf(tgt->ip_addr, IPV4_LEN, "%pI4\n",
block->target[index].ipv4_addr.byte);
}
static int qedi_find_boot_info(struct qedi_ctx *qedi,
struct qed_mfw_tlv_iscsi *iscsi,
struct nvm_iscsi_block *block)
{
struct qedi_boot_target *pri_tgt = NULL, *sec_tgt = NULL;
u32 pri_ctrl_flags = 0, sec_ctrl_flags = 0, found = 0;
struct iscsi_cls_session *cls_sess;
struct iscsi_cls_conn *cls_conn;
struct qedi_conn *qedi_conn;
struct iscsi_session *sess;
struct iscsi_conn *conn;
char ep_ip_addr[64];
int i, ret = 0;
pri_ctrl_flags = !!(block->target[0].ctrl_flags &
NVM_ISCSI_CFG_TARGET_ENABLED);
if (pri_ctrl_flags) {
pri_tgt = kzalloc(sizeof(*pri_tgt), GFP_KERNEL);
if (!pri_tgt)
return -1;
qedi_get_boot_tgt_info(block, pri_tgt, 0);
}
sec_ctrl_flags = !!(block->target[1].ctrl_flags &
NVM_ISCSI_CFG_TARGET_ENABLED);
if (sec_ctrl_flags) {
sec_tgt = kzalloc(sizeof(*sec_tgt), GFP_KERNEL);
if (!sec_tgt) {
ret = -1;
goto free_tgt;
}
qedi_get_boot_tgt_info(block, sec_tgt, 1);
}
for (i = 0; i < qedi->max_active_conns; i++) {
qedi_conn = qedi_get_conn_from_id(qedi, i);
if (!qedi_conn)
continue;
if (qedi_conn->ep->ip_type == TCP_IPV4)
snprintf(ep_ip_addr, IPV4_LEN, "%pI4\n",
qedi_conn->ep->dst_addr);
else
snprintf(ep_ip_addr, IPV6_LEN, "%pI6\n",
qedi_conn->ep->dst_addr);
cls_conn = qedi_conn->cls_conn;
conn = cls_conn->dd_data;
cls_sess = iscsi_conn_to_session(cls_conn);
sess = cls_sess->dd_data;
if (!iscsi_is_session_online(cls_sess))
continue;
if (!sess->targetname)
continue;
if (pri_ctrl_flags) {
if (!strcmp(pri_tgt->iscsi_name, sess->targetname) &&
!strcmp(pri_tgt->ip_addr, ep_ip_addr)) {