Commit 97d8105c authored by Rajesh Borundia's avatar Rajesh Borundia Committed by David S. Miller

qlcnic: VF FLR implementation.

o FLR from Hypervisor - When hypervisor issues a VF FLR request,
  adapter notifies the parent PF driver of the FLR request for PF
  driver to perform any cleanup on behalf of that VF.
o FLR from VF Driver - VF driver may initiate a VF FLR request,
  if VF state needs to be cleaned up before a re-initialization.
  VF re-initialization during kdump is an example.
o PF driver cleans up all resources allocated on behalf of a  VF,
  on VF FLR notifications from the adapter or from the VF driver.
Signed-off-by: default avatarManish Chopra <manish.chopra@qlogic.com>
Signed-off-by: default avatarSucheta Chakraborty <sucheta.chakraborty@qlogic.com>
Signed-off-by: default avatarRajesh Borundia <rajesh.borundia@qlogic.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f80bc8fe
......@@ -2112,6 +2112,7 @@ static int __qlcnic_shutdown(struct pci_dev *pdev)
if (netif_running(netdev))
qlcnic_down(adapter, netdev);
qlcnic_sriov_cleanup(adapter);
if (qlcnic_82xx_check(adapter))
qlcnic_clr_all_drv_state(adapter, 0);
......
......@@ -91,6 +91,8 @@ enum qlcnic_vf_state {
QLC_BC_VF_RECV,
QLC_BC_VF_CHANNEL,
QLC_BC_VF_STATE,
QLC_BC_VF_FLR,
QLC_BC_VF_SOFT_FLR,
};
struct qlcnic_resources {
......@@ -124,9 +126,11 @@ struct qlcnic_vf_info {
unsigned long state;
struct completion ch_free_cmpl;
struct work_struct trans_work;
struct work_struct flr_work;
/* It synchronizes commands sent from VF */
struct mutex send_cmd_lock;
struct qlcnic_bc_trans *send_cmd;
struct qlcnic_bc_trans *flr_trans;
struct qlcnic_trans_list rcv_act;
struct qlcnic_trans_list rcv_pend;
struct qlcnic_adapter *adapter;
......@@ -143,6 +147,7 @@ struct qlcnic_back_channel {
u16 trans_counter;
struct workqueue_struct *bc_trans_wq;
struct workqueue_struct *bc_async_wq;
struct workqueue_struct *bc_flr_wq;
struct list_head async_list;
};
......@@ -165,6 +170,9 @@ int qlcnic_sriov_channel_cfg_cmd(struct qlcnic_adapter *, u8);
void qlcnic_sriov_handle_bc_event(struct qlcnic_adapter *, u32);
int qlcnic_sriov_cfg_bc_intr(struct qlcnic_adapter *, u8);
void qlcnic_sriov_cleanup_async_list(struct qlcnic_back_channel *);
void qlcnic_sriov_cleanup_list(struct qlcnic_trans_list *);
int __qlcnic_sriov_add_act_list(struct qlcnic_sriov *, struct qlcnic_vf_info *,
struct qlcnic_bc_trans *);
static inline bool qlcnic_sriov_enable_check(struct qlcnic_adapter *adapter)
{
......@@ -185,6 +193,10 @@ void qlcnic_pf_set_interface_id_del_tx_ctx(struct qlcnic_adapter *, u32 *);
void qlcnic_pf_set_interface_id_promisc(struct qlcnic_adapter *, u32 *);
void qlcnic_pf_set_interface_id_ipaddr(struct qlcnic_adapter *, u32 *);
void qlcnic_pf_set_interface_id_macaddr(struct qlcnic_adapter *, u32 *);
void qlcnic_sriov_pf_handle_flr(struct qlcnic_sriov *, struct qlcnic_vf_info *);
bool qlcnic_sriov_soft_flr_check(struct qlcnic_adapter *,
struct qlcnic_bc_trans *,
struct qlcnic_vf_info *);
#else
static inline void qlcnic_sriov_pf_disable(struct qlcnic_adapter *adapter) {}
static inline void qlcnic_sriov_pf_cleanup(struct qlcnic_adapter *adapter) {}
......@@ -209,6 +221,12 @@ qlcnic_pf_set_interface_id_macaddr(struct qlcnic_adapter *adapter, u32 *int_id)
static inline void
qlcnic_pf_set_interface_id_promisc(struct qlcnic_adapter *adapter, u32 *int_id)
{}
static inline void qlcnic_sriov_pf_handle_flr(struct qlcnic_sriov *sriov,
struct qlcnic_vf_info *vf) {}
static inline bool qlcnic_sriov_soft_flr_check(struct qlcnic_adapter *adapter,
struct qlcnic_bc_trans *trans,
struct qlcnic_vf_info *vf)
{ return false; }
#endif
#endif
......@@ -18,12 +18,14 @@
#define QLC_BC_MSG 0
#define QLC_BC_CFREE 1
#define QLC_BC_FLR 2
#define QLC_BC_HDR_SZ 16
#define QLC_BC_PAYLOAD_SZ (1024 - QLC_BC_HDR_SZ)
#define QLC_DEFAULT_RCV_DESCRIPTORS_SRIOV_VF 2048
#define QLC_DEFAULT_JUMBO_RCV_DESCRIPTORS_SRIOV_VF 512
static void qlcnic_sriov_cleanup_transaction(struct qlcnic_bc_trans *);
static int qlcnic_sriov_vf_mbx_op(struct qlcnic_adapter *,
struct qlcnic_cmd_args *);
......@@ -84,6 +86,11 @@ static inline bool qlcnic_sriov_channel_free_check(u32 val)
return (val & (1 << QLC_BC_CFREE)) ? true : false;
}
static inline bool qlcnic_sriov_flr_check(u32 val)
{
return (val & (1 << QLC_BC_FLR)) ? true : false;
}
static inline u8 qlcnic_sriov_target_func_id(u32 val)
{
return (val >> 4) & 0xff;
......@@ -192,10 +199,33 @@ qlcnic_free_sriov:
return err;
}
void qlcnic_sriov_cleanup_list(struct qlcnic_trans_list *t_list)
{
struct qlcnic_bc_trans *trans;
struct qlcnic_cmd_args cmd;
unsigned long flags;
spin_lock_irqsave(&t_list->lock, flags);
while (!list_empty(&t_list->wait_list)) {
trans = list_first_entry(&t_list->wait_list,
struct qlcnic_bc_trans, list);
list_del(&trans->list);
t_list->count--;
cmd.req.arg = (u32 *)trans->req_pay;
cmd.rsp.arg = (u32 *)trans->rsp_pay;
qlcnic_free_mbx_args(&cmd);
qlcnic_sriov_cleanup_transaction(trans);
}
spin_unlock_irqrestore(&t_list->lock, flags);
}
void __qlcnic_sriov_cleanup(struct qlcnic_adapter *adapter)
{
struct qlcnic_sriov *sriov = adapter->ahw->sriov;
struct qlcnic_back_channel *bc = &sriov->bc;
struct qlcnic_vf_info *vf;
int i;
if (!qlcnic_sriov_enable_check(adapter))
......@@ -203,6 +233,14 @@ void __qlcnic_sriov_cleanup(struct qlcnic_adapter *adapter)
qlcnic_sriov_cleanup_async_list(bc);
destroy_workqueue(bc->bc_async_wq);
for (i = 0; i < sriov->num_vfs; i++) {
vf = &sriov->vf_info[i];
qlcnic_sriov_cleanup_list(&vf->rcv_pend);
cancel_work_sync(&vf->trans_work);
qlcnic_sriov_cleanup_list(&vf->rcv_act);
}
destroy_workqueue(bc->bc_trans_wq);
for (i = 0; i < sriov->num_vfs; i++)
......@@ -651,6 +689,9 @@ static void qlcnic_sriov_schedule_bc_cmd(struct qlcnic_sriov *sriov,
struct qlcnic_vf_info *vf,
work_func_t func)
{
if (test_bit(QLC_BC_VF_FLR, &vf->state))
return;
INIT_WORK(&vf->trans_work, func);
queue_work(sriov->bc.bc_trans_wq, &vf->trans_work);
}
......@@ -768,10 +809,13 @@ static int qlcnic_sriov_issue_bc_post(struct qlcnic_bc_trans *trans, u8 type)
static int __qlcnic_sriov_send_bc_msg(struct qlcnic_bc_trans *trans,
struct qlcnic_vf_info *vf, u8 type)
{
int err;
bool flag = true;
int err = -EIO;
while (flag) {
if (test_bit(QLC_BC_VF_FLR, &vf->state))
trans->trans_state = QLC_ABORT;
switch (trans->trans_state) {
case QLC_INIT:
trans->trans_state = QLC_WAIT_FOR_CHANNEL_FREE;
......@@ -853,6 +897,9 @@ static void qlcnic_sriov_process_bc_cmd(struct work_struct *work)
struct qlcnic_cmd_args cmd;
u8 req;
if (test_bit(QLC_BC_VF_FLR, &vf->state))
return;
trans = list_first_entry(&vf->rcv_act.wait_list,
struct qlcnic_bc_trans, list);
adapter = vf->adapter;
......@@ -906,18 +953,30 @@ clear_send:
clear_bit(QLC_BC_VF_SEND, &vf->state);
}
static int qlcnic_sriov_add_act_list(struct qlcnic_sriov *sriov,
struct qlcnic_vf_info *vf,
struct qlcnic_bc_trans *trans)
int __qlcnic_sriov_add_act_list(struct qlcnic_sriov *sriov,
struct qlcnic_vf_info *vf,
struct qlcnic_bc_trans *trans)
{
struct qlcnic_trans_list *t_list = &vf->rcv_act;
spin_lock(&t_list->lock);
t_list->count++;
list_add_tail(&trans->list, &t_list->wait_list);
if (t_list->count == 1)
qlcnic_sriov_schedule_bc_cmd(sriov, vf,
qlcnic_sriov_process_bc_cmd);
return 0;
}
static int qlcnic_sriov_add_act_list(struct qlcnic_sriov *sriov,
struct qlcnic_vf_info *vf,
struct qlcnic_bc_trans *trans)
{
struct qlcnic_trans_list *t_list = &vf->rcv_act;
spin_lock(&t_list->lock);
__qlcnic_sriov_add_act_list(sriov, vf, trans);
spin_unlock(&t_list->lock);
return 0;
}
......@@ -1019,6 +1078,10 @@ static void qlcnic_sriov_handle_bc_cmd(struct qlcnic_sriov *sriov,
trans->vf = vf;
trans->trans_id = hdr->seq_id;
trans->curr_req_frag++;
if (qlcnic_sriov_soft_flr_check(adapter, trans, vf))
return;
if (trans->curr_req_frag == trans->req_hdr->num_frags) {
if (qlcnic_sriov_add_act_list(sriov, vf, trans)) {
qlcnic_free_mbx_args(&cmd);
......@@ -1053,6 +1116,18 @@ static void qlcnic_sriov_handle_msg_event(struct qlcnic_sriov *sriov,
}
}
static void qlcnic_sriov_handle_flr_event(struct qlcnic_sriov *sriov,
struct qlcnic_vf_info *vf)
{
struct qlcnic_adapter *adapter = vf->adapter;
if (qlcnic_sriov_pf_check(adapter))
qlcnic_sriov_pf_handle_flr(sriov, vf);
else
dev_err(&adapter->pdev->dev,
"Invalid event to VF. VF should not get FLR event\n");
}
void qlcnic_sriov_handle_bc_event(struct qlcnic_adapter *adapter, u32 event)
{
struct qlcnic_vf_info *vf;
......@@ -1073,6 +1148,11 @@ void qlcnic_sriov_handle_bc_event(struct qlcnic_adapter *adapter, u32 event)
if (qlcnic_sriov_channel_free_check(event))
complete(&vf->ch_free_cmpl);
if (qlcnic_sriov_flr_check(event)) {
qlcnic_sriov_handle_flr_event(sriov, vf);
return;
}
if (qlcnic_sriov_bc_msg_check(event))
qlcnic_sriov_handle_msg_event(sriov, vf);
}
......
......@@ -303,6 +303,33 @@ static int qlcnic_sriov_pf_cfg_eswitch(struct qlcnic_adapter *adapter,
return err;
}
static void qlcnic_sriov_pf_del_flr_queue(struct qlcnic_adapter *adapter)
{
struct qlcnic_sriov *sriov = adapter->ahw->sriov;
struct qlcnic_back_channel *bc = &sriov->bc;
int i;
for (i = 0; i < sriov->num_vfs; i++)
cancel_work_sync(&sriov->vf_info[i].flr_work);
destroy_workqueue(bc->bc_flr_wq);
}
static int qlcnic_sriov_pf_create_flr_queue(struct qlcnic_adapter *adapter)
{
struct qlcnic_back_channel *bc = &adapter->ahw->sriov->bc;
struct workqueue_struct *wq;
wq = create_singlethread_workqueue("qlcnic-flr");
if (wq == NULL) {
dev_err(&adapter->pdev->dev, "Cannot create FLR workqueue\n");
return -ENOMEM;
}
bc->bc_flr_wq = wq;
return 0;
}
void qlcnic_sriov_pf_cleanup(struct qlcnic_adapter *adapter)
{
u8 func = adapter->ahw->pci_func;
......@@ -310,6 +337,7 @@ void qlcnic_sriov_pf_cleanup(struct qlcnic_adapter *adapter)
if (!qlcnic_sriov_enable_check(adapter))
return;
qlcnic_sriov_pf_del_flr_queue(adapter);
qlcnic_sriov_cfg_bc_intr(adapter, 0);
qlcnic_sriov_pf_config_vport(adapter, 0, func);
qlcnic_sriov_pf_cfg_eswitch(adapter, func, 0);
......@@ -367,7 +395,7 @@ static int qlcnic_sriov_pf_init(struct qlcnic_adapter *adapter)
err = qlcnic_sriov_pf_cfg_eswitch(adapter, func, 1);
if (err)
goto clear_sriov_enable;
return err;
err = qlcnic_sriov_pf_config_vport(adapter, 1, func);
if (err)
......@@ -402,10 +430,6 @@ delete_vport:
disable_eswitch:
qlcnic_sriov_pf_cfg_eswitch(adapter, func, 0);
clear_sriov_enable:
__qlcnic_sriov_cleanup(adapter);
adapter->ahw->op_mode = QLCNIC_MGMT_FUNC;
clear_bit(__QLCNIC_SRIOV_ENABLE, &adapter->state);
return err;
}
......@@ -431,17 +455,31 @@ static int __qlcnic_pci_sriov_enable(struct qlcnic_adapter *adapter,
set_bit(__QLCNIC_SRIOV_ENABLE, &adapter->state);
adapter->ahw->op_mode = QLCNIC_SRIOV_PF_FUNC;
if (qlcnic_sriov_init(adapter, num_vfs)) {
clear_bit(__QLCNIC_SRIOV_ENABLE, &adapter->state);
adapter->ahw->op_mode = QLCNIC_MGMT_FUNC;
return -EIO;
}
err = qlcnic_sriov_init(adapter, num_vfs);
if (err)
goto clear_op_mode;
if (qlcnic_sriov_pf_init(adapter))
return -EIO;
err = qlcnic_sriov_pf_create_flr_queue(adapter);
if (err)
goto sriov_cleanup;
err = qlcnic_sriov_pf_init(adapter);
if (err)
goto del_flr_queue;
err = qlcnic_sriov_pf_enable(adapter, num_vfs);
return err;
del_flr_queue:
qlcnic_sriov_pf_del_flr_queue(adapter);
sriov_cleanup:
__qlcnic_sriov_cleanup(adapter);
clear_op_mode:
clear_bit(__QLCNIC_SRIOV_ENABLE, &adapter->state);
adapter->ahw->op_mode = QLCNIC_MGMT_FUNC;
return err;
}
static int qlcnic_pci_sriov_enable(struct qlcnic_adapter *adapter, int num_vfs)
......@@ -463,12 +501,15 @@ static int qlcnic_pci_sriov_enable(struct qlcnic_adapter *adapter, int num_vfs)
netdev_info(netdev, "Failed to enable SR-IOV on port %d\n",
adapter->portnum);
err = -EIO;
if (qlcnic_83xx_configure_opmode(adapter))
goto error;
} else {
netdev_info(adapter->netdev,
netdev_info(netdev,
"SR-IOV is enabled successfully on port %d\n",
adapter->portnum);
/* Return number of vfs enabled */
err = num_vfs;
}
if (netif_running(netdev))
__qlcnic_up(adapter, netdev);
......@@ -1173,3 +1214,165 @@ void qlcnic_pf_set_interface_id_macaddr(struct qlcnic_adapter *adapter,
adapter->ahw->pci_func);
*int_id |= (vpid << 16) | BIT_31;
}
static void qlcnic_sriov_del_rx_ctx(struct qlcnic_adapter *adapter,
struct qlcnic_vf_info *vf)
{
struct qlcnic_cmd_args cmd;
int vpid;
if (!vf->rx_ctx_id)
return;
if (qlcnic_alloc_mbx_args(&cmd, adapter, QLCNIC_CMD_DESTROY_RX_CTX))
return;
vpid = qlcnic_sriov_pf_get_vport_handle(adapter, vf->pci_func);
if (vpid >= 0) {
cmd.req.arg[1] = vf->rx_ctx_id | (vpid & 0xffff) << 16;
if (qlcnic_issue_cmd(adapter, &cmd))
dev_err(&adapter->pdev->dev,
"Failed to delete Tx ctx in firmware for func 0x%x\n",
vf->pci_func);
else
vf->rx_ctx_id = 0;
}
qlcnic_free_mbx_args(&cmd);
}
static void qlcnic_sriov_del_tx_ctx(struct qlcnic_adapter *adapter,
struct qlcnic_vf_info *vf)
{
struct qlcnic_cmd_args cmd;
int vpid;
if (!vf->tx_ctx_id)
return;
if (qlcnic_alloc_mbx_args(&cmd, adapter, QLCNIC_CMD_DESTROY_TX_CTX))
return;
vpid = qlcnic_sriov_pf_get_vport_handle(adapter, vf->pci_func);
if (vpid >= 0) {
cmd.req.arg[1] |= vf->tx_ctx_id | (vpid & 0xffff) << 16;
if (qlcnic_issue_cmd(adapter, &cmd))
dev_err(&adapter->pdev->dev,
"Failed to delete Tx ctx in firmware for func 0x%x\n",
vf->pci_func);
else
vf->tx_ctx_id = 0;
}
qlcnic_free_mbx_args(&cmd);
}
static int qlcnic_sriov_add_act_list_irqsave(struct qlcnic_sriov *sriov,
struct qlcnic_vf_info *vf,
struct qlcnic_bc_trans *trans)
{
struct qlcnic_trans_list *t_list = &vf->rcv_act;
unsigned long flag;
spin_lock_irqsave(&t_list->lock, flag);
__qlcnic_sriov_add_act_list(sriov, vf, trans);
spin_unlock_irqrestore(&t_list->lock, flag);
return 0;
}
static void __qlcnic_sriov_process_flr(struct qlcnic_vf_info *vf)
{
struct qlcnic_adapter *adapter = vf->adapter;
qlcnic_sriov_cleanup_list(&vf->rcv_pend);
cancel_work_sync(&vf->trans_work);
qlcnic_sriov_cleanup_list(&vf->rcv_act);
if (test_bit(QLC_BC_VF_SOFT_FLR, &vf->state)) {
qlcnic_sriov_del_tx_ctx(adapter, vf);
qlcnic_sriov_del_rx_ctx(adapter, vf);
}
qlcnic_sriov_pf_config_vport(adapter, 0, vf->pci_func);
clear_bit(QLC_BC_VF_FLR, &vf->state);
if (test_bit(QLC_BC_VF_SOFT_FLR, &vf->state)) {
qlcnic_sriov_add_act_list_irqsave(adapter->ahw->sriov, vf,
vf->flr_trans);
clear_bit(QLC_BC_VF_SOFT_FLR, &vf->state);
vf->flr_trans = NULL;
}
}
static void qlcnic_sriov_pf_process_flr(struct work_struct *work)
{
struct qlcnic_vf_info *vf;
vf = container_of(work, struct qlcnic_vf_info, flr_work);
__qlcnic_sriov_process_flr(vf);
return;
}
static void qlcnic_sriov_schedule_flr(struct qlcnic_sriov *sriov,
struct qlcnic_vf_info *vf,
work_func_t func)
{
if (test_bit(__QLCNIC_RESETTING, &vf->adapter->state))
return;
INIT_WORK(&vf->flr_work, func);
queue_work(sriov->bc.bc_flr_wq, &vf->flr_work);
}
static void qlcnic_sriov_handle_soft_flr(struct qlcnic_adapter *adapter,
struct qlcnic_bc_trans *trans,
struct qlcnic_vf_info *vf)
{
struct qlcnic_sriov *sriov = adapter->ahw->sriov;
set_bit(QLC_BC_VF_FLR, &vf->state);
clear_bit(QLC_BC_VF_STATE, &vf->state);
set_bit(QLC_BC_VF_SOFT_FLR, &vf->state);
vf->flr_trans = trans;
qlcnic_sriov_schedule_flr(sriov, vf, qlcnic_sriov_pf_process_flr);
netdev_info(adapter->netdev, "Software FLR for PCI func %d\n",
vf->pci_func);
}
bool qlcnic_sriov_soft_flr_check(struct qlcnic_adapter *adapter,
struct qlcnic_bc_trans *trans,
struct qlcnic_vf_info *vf)
{
struct qlcnic_bc_hdr *hdr = trans->req_hdr;
if ((hdr->cmd_op == QLCNIC_BC_CMD_CHANNEL_INIT) &&
(hdr->op_type == QLC_BC_CMD) &&
test_bit(QLC_BC_VF_STATE, &vf->state)) {
qlcnic_sriov_handle_soft_flr(adapter, trans, vf);
return true;
}
return false;
}
void qlcnic_sriov_pf_handle_flr(struct qlcnic_sriov *sriov,
struct qlcnic_vf_info *vf)
{
struct net_device *dev = vf->adapter->netdev;
if (!test_and_clear_bit(QLC_BC_VF_STATE, &vf->state)) {
clear_bit(QLC_BC_VF_FLR, &vf->state);
return;
}
if (test_and_set_bit(QLC_BC_VF_FLR, &vf->state)) {
netdev_info(dev, "FLR for PCI func %d in progress\n",
vf->pci_func);
return;
}
qlcnic_sriov_schedule_flr(sriov, vf, qlcnic_sriov_pf_process_flr);
netdev_info(dev, "FLR received for PCI func %d\n", vf->pci_func);
}
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