Commit e74dbb73 authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'bnx2x-next'



Yuval Mintz says:

====================
bnx2x: SR-IOV patch series

(With the exception of the first patch) This series contains IOV-related
patches, where the main changes are related to the driver's IOV-support
backbone - it adds a new workqueue for IOV related tasks and removes the vfop
mechanism from the driver.

Please consider applying this series to `net-next'.
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 869f2739 16bd41dd
......@@ -1155,10 +1155,6 @@ struct bnx2x_port {
(offsetof(struct bnx2x_eth_stats, stat_name) / 4)
/* slow path */
/* slow path work-queue */
extern struct workqueue_struct *bnx2x_wq;
#define BNX2X_MAX_NUM_OF_VFS 64
#define BNX2X_VF_CID_WND 4 /* log num of queues per VF. HW config. */
#define BNX2X_CIDS_PER_VF (1 << BNX2X_VF_CID_WND)
......@@ -1413,6 +1409,12 @@ enum sp_rtnl_flag {
BNX2X_SP_RTNL_RX_MODE,
BNX2X_SP_RTNL_HYPERVISOR_VLAN,
BNX2X_SP_RTNL_TX_STOP,
BNX2X_SP_RTNL_GET_DRV_VERSION,
};
enum bnx2x_iov_flag {
BNX2X_IOV_HANDLE_VF_MSG,
BNX2X_IOV_HANDLE_FLR,
};
struct bnx2x_prev_path_list {
......@@ -1613,6 +1615,8 @@ struct bnx2x {
int mrrs;
struct delayed_work sp_task;
struct delayed_work iov_task;
atomic_t interrupt_occurred;
struct delayed_work sp_rtnl_task;
......@@ -1703,6 +1707,10 @@ struct bnx2x {
struct bnx2x_slowpath *slowpath;
dma_addr_t slowpath_mapping;
/* Mechanism protecting the drv_info_to_mcp */
struct mutex drv_info_mutex;
bool drv_info_mng_owner;
/* Total number of FW statistics requests */
u8 fw_stats_num;
......@@ -1892,6 +1900,9 @@ struct bnx2x {
/* operation indication for the sp_rtnl task */
unsigned long sp_rtnl_state;
/* Indication of the IOV tasks */
unsigned long iov_task_state;
/* DCBX Negotiation results */
struct dcbx_features dcbx_local_feat;
u32 dcbx_error;
......@@ -2535,6 +2546,8 @@ enum {
void bnx2x_set_local_cmng(struct bnx2x *bp);
void bnx2x_update_mng_version(struct bnx2x *bp);
#define MCPR_SCRATCH_BASE(bp) \
(CHIP_IS_E1x(bp) ? MCP_REG_MCPR_SCRATCH : MCP_A_REG_MCPR_SCRATCH)
......
......@@ -2804,6 +2804,9 @@ int bnx2x_nic_load(struct bnx2x *bp, int load_mode)
if (CNIC_ENABLED(bp))
bnx2x_load_cnic(bp);
if (IS_PF(bp))
bnx2x_schedule_sp_rtnl(bp, BNX2X_SP_RTNL_GET_DRV_VERSION, 0);
if (IS_PF(bp) && SHMEM2_HAS(bp, drv_capabilities_flag)) {
/* mark driver is loaded in shmem2 */
u32 val;
......@@ -3030,6 +3033,10 @@ int bnx2x_nic_unload(struct bnx2x *bp, int unload_mode, bool keep_link)
bp->state = BNX2X_STATE_CLOSED;
bp->cnic_loaded = false;
/* Clear driver version indication in shmem */
if (IS_PF(bp))
bnx2x_update_mng_version(bp);
/* Check if there are pending parity attentions. If there are - set
* RECOVERY_IN_PROGRESS.
*/
......
......@@ -2969,8 +2969,9 @@ static void bnx2x_self_test(struct net_device *dev,
#define IS_PORT_STAT(i) \
((bnx2x_stats_arr[i].flags & STATS_FLAGS_BOTH) == STATS_FLAGS_PORT)
#define IS_FUNC_STAT(i) (bnx2x_stats_arr[i].flags & STATS_FLAGS_FUNC)
#define IS_MF_MODE_STAT(bp) \
(IS_MF(bp) && !(bp->msg_enable & BNX2X_MSG_STATS))
#define HIDE_PORT_STAT(bp) \
((IS_MF(bp) && !(bp->msg_enable & BNX2X_MSG_STATS)) || \
IS_VF(bp))
/* ethtool statistics are displayed for all regular ethernet queues and the
* fcoe L2 queue if not disabled
......@@ -2992,7 +2993,7 @@ static int bnx2x_get_sset_count(struct net_device *dev, int stringset)
BNX2X_NUM_Q_STATS;
} else
num_strings = 0;
if (IS_MF_MODE_STAT(bp)) {
if (HIDE_PORT_STAT(bp)) {
for (i = 0; i < BNX2X_NUM_STATS; i++)
if (IS_FUNC_STAT(i))
num_strings++;
......@@ -3047,7 +3048,7 @@ static void bnx2x_get_strings(struct net_device *dev, u32 stringset, u8 *buf)
}
for (i = 0, j = 0; i < BNX2X_NUM_STATS; i++) {
if (IS_MF_MODE_STAT(bp) && IS_PORT_STAT(i))
if (HIDE_PORT_STAT(bp) && IS_PORT_STAT(i))
continue;
strcpy(buf + (k + j)*ETH_GSTRING_LEN,
bnx2x_stats_arr[i].string);
......@@ -3105,7 +3106,7 @@ static void bnx2x_get_ethtool_stats(struct net_device *dev,
hw_stats = (u32 *)&bp->eth_stats;
for (i = 0, j = 0; i < BNX2X_NUM_STATS; i++) {
if (IS_MF_MODE_STAT(bp) && IS_PORT_STAT(i))
if (HIDE_PORT_STAT(bp) && IS_PORT_STAT(i))
continue;
if (bnx2x_stats_arr[i].size == 0) {
/* skip this counter */
......
......@@ -2003,6 +2003,23 @@ struct shmem_lfa {
#define SHMEM_LFA_DONT_CLEAR_STAT (1<<24)
};
/* Used to support NSCI get OS driver version
* on driver load the version value will be set
* on driver unload driver value of 0x0 will be set.
*/
struct os_drv_ver {
#define DRV_VER_NOT_LOADED 0
/* personalties order is important */
#define DRV_PERS_ETHERNET 0
#define DRV_PERS_ISCSI 1
#define DRV_PERS_FCOE 2
/* shmem2 struct is constant can't add more personalties here */
#define MAX_DRV_PERS 3
u32 versions[MAX_DRV_PERS];
};
struct ncsi_oem_fcoe_features {
u32 fcoe_features1;
#define FCOE_FEATURES1_IOS_PER_CONNECTION_MASK 0x0000FFFF
......@@ -2217,6 +2234,18 @@ struct shmem2_region {
u32 reserved4; /* Offset 0x150 */
u32 link_attr_sync[PORT_MAX]; /* Offset 0x154 */
#define LINK_ATTR_SYNC_KR2_ENABLE (1<<0)
u32 reserved5[2];
u32 reserved6[PORT_MAX];
/* driver version for each personality */
struct os_drv_ver func_os_drv_ver[E2_FUNC_MAX]; /* Offset 0x16c */
/* Flag to the driver that PF's drv_info_host_addr buffer was read */
u32 mfw_drv_indication;
/* We use indication for each PF (0..3) */
#define MFW_DRV_IND_READ_DONE_OFFSET(_pf_) (1 << (_pf_))
};
......
......@@ -120,7 +120,8 @@ static int debug;
module_param(debug, int, S_IRUGO);
MODULE_PARM_DESC(debug, " Default debug msglevel");
struct workqueue_struct *bnx2x_wq;
static struct workqueue_struct *bnx2x_wq;
struct workqueue_struct *bnx2x_iov_wq;
struct bnx2x_mac_vals {
u32 xmac_addr;
......@@ -1856,8 +1857,6 @@ void bnx2x_sp_event(struct bnx2x_fastpath *fp, union eth_rx_cqe *rr_cqe)
#else
return;
#endif
/* SRIOV: reschedule any 'in_progress' operations */
bnx2x_iov_sp_event(bp, cid, true);
smp_mb__before_atomic_inc();
atomic_inc(&bp->cq_spq_left);
......@@ -3482,10 +3481,15 @@ static void bnx2x_handle_eee_event(struct bnx2x *bp)
bnx2x_fw_command(bp, DRV_MSG_CODE_EEE_RESULTS_ACK, 0);
}
#define BNX2X_UPDATE_DRV_INFO_IND_LENGTH (20)
#define BNX2X_UPDATE_DRV_INFO_IND_COUNT (25)
static void bnx2x_handle_drv_info_req(struct bnx2x *bp)
{
enum drv_info_opcode op_code;
u32 drv_info_ctl = SHMEM2_RD(bp, drv_info_control);
bool release = false;
int wait;
/* if drv_info version supported by MFW doesn't match - send NACK */
if ((drv_info_ctl & DRV_INFO_CONTROL_VER_MASK) != DRV_INFO_CUR_VER) {
......@@ -3496,6 +3500,9 @@ static void bnx2x_handle_drv_info_req(struct bnx2x *bp)
op_code = (drv_info_ctl & DRV_INFO_CONTROL_OP_CODE_MASK) >>
DRV_INFO_CONTROL_OP_CODE_SHIFT;
/* Must prevent other flows from accessing drv_info_to_mcp */
mutex_lock(&bp->drv_info_mutex);
memset(&bp->slowpath->drv_info_to_mcp, 0,
sizeof(union drv_info_to_mcp));
......@@ -3512,7 +3519,7 @@ static void bnx2x_handle_drv_info_req(struct bnx2x *bp)
default:
/* if op code isn't supported - send NACK */
bnx2x_fw_command(bp, DRV_MSG_CODE_DRV_INFO_NACK, 0);
return;
goto out;
}
/* if we got drv_info attn from MFW then these fields are defined in
......@@ -3524,6 +3531,106 @@ static void bnx2x_handle_drv_info_req(struct bnx2x *bp)
U64_HI(bnx2x_sp_mapping(bp, drv_info_to_mcp)));
bnx2x_fw_command(bp, DRV_MSG_CODE_DRV_INFO_ACK, 0);
/* Since possible management wants both this and get_driver_version
* need to wait until management notifies us it finished utilizing
* the buffer.
*/
if (!SHMEM2_HAS(bp, mfw_drv_indication)) {
DP(BNX2X_MSG_MCP, "Management does not support indication\n");
} else if (!bp->drv_info_mng_owner) {
u32 bit = MFW_DRV_IND_READ_DONE_OFFSET((BP_ABS_FUNC(bp) >> 1));
for (wait = 0; wait < BNX2X_UPDATE_DRV_INFO_IND_COUNT; wait++) {
u32 indication = SHMEM2_RD(bp, mfw_drv_indication);
/* Management is done; need to clear indication */
if (indication & bit) {
SHMEM2_WR(bp, mfw_drv_indication,
indication & ~bit);
release = true;
break;
}
msleep(BNX2X_UPDATE_DRV_INFO_IND_LENGTH);
}
}
if (!release) {
DP(BNX2X_MSG_MCP, "Management did not release indication\n");
bp->drv_info_mng_owner = true;
}
out:
mutex_unlock(&bp->drv_info_mutex);
}
static u32 bnx2x_update_mng_version_utility(u8 *version, bool bnx2x_format)
{
u8 vals[4];
int i = 0;
if (bnx2x_format) {
i = sscanf(version, "1.%c%hhd.%hhd.%hhd",
&vals[0], &vals[1], &vals[2], &vals[3]);
if (i > 0)
vals[0] -= '0';
} else {
i = sscanf(version, "%hhd.%hhd.%hhd.%hhd",
&vals[0], &vals[1], &vals[2], &vals[3]);
}
while (i < 4)
vals[i++] = 0;
return (vals[0] << 24) | (vals[1] << 16) | (vals[2] << 8) | vals[3];
}
void bnx2x_update_mng_version(struct bnx2x *bp)
{
u32 iscsiver = DRV_VER_NOT_LOADED;
u32 fcoever = DRV_VER_NOT_LOADED;
u32 ethver = DRV_VER_NOT_LOADED;
int idx = BP_FW_MB_IDX(bp);
u8 *version;
if (!SHMEM2_HAS(bp, func_os_drv_ver))
return;
mutex_lock(&bp->drv_info_mutex);
/* Must not proceed when `bnx2x_handle_drv_info_req' is feasible */
if (bp->drv_info_mng_owner)
goto out;
if (bp->state != BNX2X_STATE_OPEN)
goto out;
/* Parse ethernet driver version */
ethver = bnx2x_update_mng_version_utility(DRV_MODULE_VERSION, true);
if (!CNIC_LOADED(bp))
goto out;
/* Try getting storage driver version via cnic */
memset(&bp->slowpath->drv_info_to_mcp, 0,
sizeof(union drv_info_to_mcp));
bnx2x_drv_info_iscsi_stat(bp);
version = bp->slowpath->drv_info_to_mcp.iscsi_stat.version;
iscsiver = bnx2x_update_mng_version_utility(version, false);
memset(&bp->slowpath->drv_info_to_mcp, 0,
sizeof(union drv_info_to_mcp));
bnx2x_drv_info_fcoe_stat(bp);
version = bp->slowpath->drv_info_to_mcp.fcoe_stat.version;
fcoever = bnx2x_update_mng_version_utility(version, false);
out:
SHMEM2_WR(bp, func_os_drv_ver[idx].versions[DRV_PERS_ETHERNET], ethver);
SHMEM2_WR(bp, func_os_drv_ver[idx].versions[DRV_PERS_ISCSI], iscsiver);
SHMEM2_WR(bp, func_os_drv_ver[idx].versions[DRV_PERS_FCOE], fcoever);
mutex_unlock(&bp->drv_info_mutex);
DP(BNX2X_MSG_MCP, "Setting driver version: ETH [%08x] iSCSI [%08x] FCoE [%08x]\n",
ethver, iscsiver, fcoever);
}
static void bnx2x_dcc_event(struct bnx2x *bp, u32 dcc_event)
......@@ -4052,7 +4159,8 @@ static void bnx2x_attn_int_deasserted3(struct bnx2x *bp, u32 attn)
bnx2x_handle_drv_info_req(bp);
if (val & DRV_STATUS_VF_DISABLED)
bnx2x_vf_handle_flr_event(bp);
bnx2x_schedule_iov_task(bp,
BNX2X_IOV_HANDLE_FLR);
if ((bp->port.pmf == 0) && (val & DRV_STATUS_PMF))
bnx2x_pmf_update(bp);
......@@ -5243,8 +5351,8 @@ static void bnx2x_eq_int(struct bnx2x *bp)
/* handle eq element */
switch (opcode) {
case EVENT_RING_OPCODE_VF_PF_CHANNEL:
DP(BNX2X_MSG_IOV, "vf pf channel element on eq\n");
bnx2x_vf_mbx(bp, &elem->message.data.vf_pf_event);
bnx2x_vf_mbx_schedule(bp,
&elem->message.data.vf_pf_event);
continue;
case EVENT_RING_OPCODE_STAT_QUERY:
......@@ -5459,13 +5567,6 @@ static void bnx2x_sp_task(struct work_struct *work)
le16_to_cpu(bp->def_att_idx), IGU_INT_ENABLE, 1);
}
/* must be called after the EQ processing (since eq leads to sriov
* ramrod completion flows).
* This flow may have been scheduled by the arrival of a ramrod
* completion, or by the sriov code rescheduling itself.
*/
bnx2x_iov_sp_task(bp);
/* afex - poll to check if VIFSET_ACK should be sent to MFW */
if (test_and_clear_bit(BNX2X_AFEX_PENDING_VIFSET_MCP_ACK,
&bp->sp_state)) {
......@@ -8882,6 +8983,7 @@ static int bnx2x_func_wait_started(struct bnx2x *bp)
synchronize_irq(bp->pdev->irq);
flush_workqueue(bnx2x_wq);
flush_workqueue(bnx2x_iov_wq);
while (bnx2x_func_get_state(bp, &bp->func_obj) !=
BNX2X_F_STATE_STARTED && tout--)
......@@ -9807,6 +9909,10 @@ sp_rtnl_not_reset:
bnx2x_dcbx_resume_hw_tx(bp);
}
if (test_and_clear_bit(BNX2X_SP_RTNL_GET_DRV_VERSION,
&bp->sp_rtnl_state))
bnx2x_update_mng_version(bp);
/* work which needs rtnl lock not-taken (as it takes the lock itself and
* can be called from other contexts as well)
*/
......@@ -11757,12 +11863,15 @@ static int bnx2x_init_bp(struct bnx2x *bp)
mutex_init(&bp->port.phy_mutex);
mutex_init(&bp->fw_mb_mutex);
mutex_init(&bp->drv_info_mutex);
bp->drv_info_mng_owner = false;
spin_lock_init(&bp->stats_lock);
sema_init(&bp->stats_sema, 1);
INIT_DELAYED_WORK(&bp->sp_task, bnx2x_sp_task);
INIT_DELAYED_WORK(&bp->sp_rtnl_task, bnx2x_sp_rtnl_task);
INIT_DELAYED_WORK(&bp->period_task, bnx2x_period_task);
INIT_DELAYED_WORK(&bp->iov_task, bnx2x_iov_task);
if (IS_PF(bp)) {
rc = bnx2x_get_hwinfo(bp);
if (rc)
......@@ -13385,11 +13494,18 @@ static int __init bnx2x_init(void)
pr_err("Cannot create workqueue\n");
return -ENOMEM;
}
bnx2x_iov_wq = create_singlethread_workqueue("bnx2x_iov");
if (!bnx2x_iov_wq) {
pr_err("Cannot create iov workqueue\n");
destroy_workqueue(bnx2x_wq);
return -ENOMEM;
}
ret = pci_register_driver(&bnx2x_pci_driver);
if (ret) {
pr_err("Cannot register driver\n");
destroy_workqueue(bnx2x_wq);
destroy_workqueue(bnx2x_iov_wq);
}
return ret;
}
......@@ -13401,6 +13517,7 @@ static void __exit bnx2x_cleanup(void)
pci_unregister_driver(&bnx2x_pci_driver);
destroy_workqueue(bnx2x_wq);
destroy_workqueue(bnx2x_iov_wq);
/* Free globally allocated resources */
list_for_each_safe(pos, q, &bnx2x_prev_list) {
......@@ -13794,6 +13911,7 @@ static int bnx2x_drv_ctl(struct net_device *dev, struct drv_ctl_info *ctl)
REG_WR(bp, scratch_offset + i,
*(host_addr + i/4));
}
bnx2x_schedule_sp_rtnl(bp, BNX2X_SP_RTNL_GET_DRV_VERSION, 0);
break;
}
......@@ -13811,6 +13929,7 @@ static int bnx2x_drv_ctl(struct net_device *dev, struct drv_ctl_info *ctl)
cap &= ~DRV_FLAGS_CAPABILITIES_LOADED_FCOE;
SHMEM2_WR(bp, drv_capabilities_flag[idx], cap);
}
bnx2x_schedule_sp_rtnl(bp, BNX2X_SP_RTNL_GET_DRV_VERSION, 0);
break;
}
......@@ -13916,6 +14035,9 @@ static int bnx2x_register_cnic(struct net_device *dev, struct cnic_ops *ops,
rcu_assign_pointer(bp->cnic_ops, ops);
/* Schedule driver to read CNIC driver versions */
bnx2x_schedule_sp_rtnl(bp, BNX2X_SP_RTNL_GET_DRV_VERSION, 0);
return 0;
}
......
......@@ -30,6 +30,8 @@ enum sample_bulletin_result {
#ifdef CONFIG_BNX2X_SRIOV
extern struct workqueue_struct *bnx2x_iov_wq;
/* The bnx2x device structure holds vfdb structure described below.
* The VF array is indexed by the relative vfid.
*/
......@@ -86,113 +88,32 @@ struct bnx2x_vf_queue {
bool sp_initialized;
};
/* struct bnx2x_vfop_qctor_params - prepare queue construction parameters:
* q-init, q-setup and SB index
/* struct bnx2x_vf_queue_construct_params - prepare queue construction
* parameters: q-init, q-setup and SB index
*/
struct bnx2x_vfop_qctor_params {
struct bnx2x_vf_queue_construct_params {
struct bnx2x_queue_state_params qstate;
struct bnx2x_queue_setup_params prep_qsetup;
};
/* VFOP parameters (one copy per VF) */
union bnx2x_vfop_params {
struct bnx2x_vlan_mac_ramrod_params vlan_mac;
struct bnx2x_rx_mode_ramrod_params rx_mode;
struct bnx2x_mcast_ramrod_params mcast;
struct bnx2x_config_rss_params rss;
struct bnx2x_vfop_qctor_params qctor;
struct bnx2x_queue_state_params qstate;
};
/* forward */
struct bnx2x_virtf;
/* VFOP definitions */
typedef void (*vfop_handler_t)(struct bnx2x *bp, struct bnx2x_virtf *vf);
struct bnx2x_vfop_cmd {
vfop_handler_t done;
bool block;
};
/* VFOP queue filters command additional arguments */
struct bnx2x_vfop_filter {
struct list_head link;
struct bnx2x_vf_mac_vlan_filter {
int type;
#define BNX2X_VFOP_FILTER_MAC 1
#define BNX2X_VFOP_FILTER_VLAN 2
#define BNX2X_VF_FILTER_MAC 1
#define BNX2X_VF_FILTER_VLAN 2
bool add;
u8 *mac;
u16 vid;
};
struct bnx2x_vfop_filters {
int add_cnt;
struct list_head head;
struct bnx2x_vfop_filter filters[];
};
/* transient list allocated, built and saved until its
* passed to the SP-VERBs layer.
*/
struct bnx2x_vfop_args_mcast {
int mc_num;
struct bnx2x_mcast_list_elem *mc;
};
struct bnx2x_vfop_args_qctor {
int qid;
u16 sb_idx;
};
struct bnx2x_vfop_args_qdtor {
int qid;
struct eth_context *cxt;
};
struct bnx2x_vfop_args_defvlan {
int qid;
bool enable;
u16 vid;
u8 prio;
};
struct bnx2x_vfop_args_qx {
int qid;
bool en_add;
};
struct bnx2x_vfop_args_filters {
struct bnx2x_vfop_filters *multi_filter;
atomic_t *credit; /* non NULL means 'don't consume credit' */
};
struct bnx2x_vfop_args_tpa {
int qid;
dma_addr_t sge_map[PFVF_MAX_QUEUES_PER_VF];
};
union bnx2x_vfop_args {
struct bnx2x_vfop_args_mcast mc_list;
struct bnx2x_vfop_args_qctor qctor;
struct bnx2x_vfop_args_qdtor qdtor;
struct bnx2x_vfop_args_defvlan defvlan;
struct bnx2x_vfop_args_qx qx;
struct bnx2x_vfop_args_filters filters;
struct bnx2x_vfop_args_tpa tpa;
};
struct bnx2x_vfop {
struct list_head link;
int rc; /* return code */
int state; /* next state */
union bnx2x_vfop_args args; /* extra arguments */
union bnx2x_vfop_params *op_p; /* ramrod params */
/* state machine callbacks */
vfop_handler_t transition;
vfop_handler_t done;
struct bnx2x_vf_mac_vlan_filters {
int count;
struct bnx2x_vf_mac_vlan_filter filters[];
};
/* vf context */
......@@ -212,15 +133,7 @@ struct bnx2x_virtf {
#define VF_ENABLED 2 /* VF Enabled */
#define VF_RESET 3 /* VF FLR'd, pending cleanup */
/* non 0 during flr cleanup */
u8 flr_clnup_stage;
#define VF_FLR_CLN 1 /* reclaim resources and do 'final cleanup'
* sans the end-wait
*/
#define VF_FLR_ACK 2 /* ACK flr notification */
#define VF_FLR_EPILOG 3 /* wait for VF remnants to dissipate in the HW
* ~ final cleanup' end wait
*/
bool flr_clnup_stage; /* true during flr cleanup */
/* dma */
dma_addr_t fw_stat_map; /* valid iff VF_CFG_STATS */
......@@ -284,11 +197,6 @@ struct bnx2x_virtf {
struct bnx2x_rss_config_obj rss_conf_obj;
/* slow-path operations */
atomic_t op_in_progress;
int op_rc;
bool op_wait_blocking;
struct list_head op_list_head;
union bnx2x_vfop_params op_params;
struct mutex op_mutex; /* one vfop at a time mutex */
enum channel_tlvs op_current;
};
......@@ -346,11 +254,6 @@ struct bnx2x_vf_mbx {
u32 vf_addr_hi;
struct vfpf_first_tlv first_tlv; /* saved VF request header */
u8 flags;
#define VF_MSG_INPROCESS 0x1 /* failsafe - the FW should prevent
* more then one pending msg
*/