/**
* e1000e_ptp_init - initialize PTP for devices which support it
* @adapter: board private structure
*
* This function performs the required steps for enabling PTP support.
* If PTP support has already been loaded it simply calls the cyclecounter
* init routine and exits.
**/
void e1000e_ptp_init(struct e1000_adapter *adapter)
{
struct e1000_hw *hw = &adapter->hw;
adapter->ptp_clock = NULL;
if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP))
return;
adapter->ptp_clock_info = e1000e_ptp_clock_info;
snprintf(adapter->ptp_clock_info.name,
sizeof(adapter->ptp_clock_info.name), "%pm",
adapter->netdev->perm_addr);
switch (hw->mac.type) {
case e1000_pch2lan:
case e1000_pch_lpt:
case e1000_pch_spt:
if (((hw->mac.type != e1000_pch_lpt) &&
(hw->mac.type != e1000_pch_spt)) ||
(er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_SYSCFI)) {
adapter->ptp_clock_info.max_adj = 24000000 - 1;
break;
}
/* fall-through */
case e1000_82574:
case e1000_82583:
adapter->ptp_clock_info.max_adj = 600000000 - 1;
break;
default:
break;
}
#ifdef CONFIG_E1000E_HWTS
/* CPU must have ART and GBe must be from Sunrise Point or greater */
if (hw->mac.type >= e1000_pch_spt && boot_cpu_has(X86_FEATURE_ART))
adapter->ptp_clock_info.getcrosststamp =
e1000e_phc_getcrosststamp;
#endif/*CONFIG_E1000E_HWTS*/
INIT_DELAYED_WORK(&adapter->systim_overflow_work,
e1000e_systim_overflow_work);
schedule_delayed_work(&adapter->systim_overflow_work,
E1000_SYSTIM_OVERFLOW_PERIOD);
adapter->ptp_clock = ptp_clock_register(&adapter->ptp_clock_info,
&adapter->pdev->dev);
if (IS_ERR(adapter->ptp_clock)) {
adapter->ptp_clock = NULL;
e_err("ptp_clock_register failed\n");
} else if (adapter->ptp_clock) {
e_info("registered PHC clock\n");
}
}
static int e1000_set_settings(struct net_device *netdev,
struct ethtool_cmd *ecmd)
{
struct e1000_adapter *adapter = netdev_priv(netdev);
struct e1000_hw *hw = &adapter->hw;
/*
* When SoL/IDER sessions are active, autoneg/speed/duplex
* cannot be changed
*/
if (e1000_check_reset_block(hw)) {
e_err("Cannot change link characteristics when SoL/IDER is "
"active.\n");
return -EINVAL;
}
while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
msleep(1);
if (ecmd->autoneg == AUTONEG_ENABLE) {
hw->mac.autoneg = 1;
if (hw->phy.media_type == e1000_media_type_fiber)
hw->phy.autoneg_advertised = ADVERTISED_1000baseT_Full |
ADVERTISED_FIBRE |
ADVERTISED_Autoneg;
else
hw->phy.autoneg_advertised = ecmd->advertising |
ADVERTISED_TP |
ADVERTISED_Autoneg;
ecmd->advertising = hw->phy.autoneg_advertised;
if (adapter->fc_autoneg)
hw->fc.requested_mode = e1000_fc_default;
} else {
if (e1000_set_spd_dplx(adapter, ecmd->speed + ecmd->duplex)) {
clear_bit(__E1000_RESETTING, &adapter->state);
return -EINVAL;
}
}
/* reset the link */
if (netif_running(adapter->netdev)) {
e1000e_down(adapter);
e1000e_up(adapter);
} else {
e1000e_reset(adapter);
}
clear_bit(__E1000_RESETTING, &adapter->state);
return 0;
}
static bool reg_set_and_check(struct e1000_adapter *adapter, u64 *data,
int reg, u32 mask, u32 write)
{
u32 val;
__ew32(&adapter->hw, reg, write & mask);
val = __er32(&adapter->hw, reg);
if ((write & mask) != (val & mask)) {
e_err("set/check reg %04X test failed: got 0x%08X expected 0x%08X\n",
reg, (val & mask), (write & mask));
*data = reg;
return 1;
}
return 0;
}
static int e1000_set_spd_dplx(struct e1000_adapter *adapter, u16 spddplx)
{
struct e1000_mac_info *mac = &adapter->hw.mac;
mac->autoneg = 0;
/* Fiber NICs only allow 1000 gbps Full duplex */
if ((adapter->hw.phy.media_type == e1000_media_type_fiber) &&
spddplx != (SPEED_1000 + DUPLEX_FULL)) {
e_err("Unsupported Speed/Duplex configuration\n");
return -EINVAL;
}
switch (spddplx) {
case SPEED_10 + DUPLEX_HALF:
mac->forced_speed_duplex = ADVERTISE_10_HALF;
break;
case SPEED_10 + DUPLEX_FULL:
mac->forced_speed_duplex = ADVERTISE_10_FULL;
break;
case SPEED_100 + DUPLEX_HALF:
mac->forced_speed_duplex = ADVERTISE_100_HALF;
break;
case SPEED_100 + DUPLEX_FULL:
mac->forced_speed_duplex = ADVERTISE_100_FULL;
break;
case SPEED_1000 + DUPLEX_FULL:
mac->autoneg = 1;
adapter->hw.phy.autoneg_advertised = ADVERTISE_1000_FULL;
break;
case SPEED_1000 + DUPLEX_HALF: /* not supported */
default:
e_err("Unsupported Speed/Duplex configuration\n");
return -EINVAL;
}
return 0;
}
static int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx)
{
struct e1000_mac_info *mac = &adapter->hw.mac;
mac->autoneg = 0;
/* Make sure dplx is at most 1 bit and lsb of speed is not set
* for the switch() below to work */
if ((spd & 1) || (dplx & ~1))
goto err_inval;
/* Fiber NICs only allow 1000 gbps Full duplex */
if ((adapter->hw.phy.media_type == e1000_media_type_fiber) &&
spd != SPEED_1000 &&
dplx != DUPLEX_FULL) {
goto err_inval;
}
switch (spd + dplx) {
case SPEED_10 + DUPLEX_HALF:
mac->forced_speed_duplex = ADVERTISE_10_HALF;
break;
case SPEED_10 + DUPLEX_FULL:
mac->forced_speed_duplex = ADVERTISE_10_FULL;
break;
case SPEED_100 + DUPLEX_HALF:
mac->forced_speed_duplex = ADVERTISE_100_HALF;
break;
case SPEED_100 + DUPLEX_FULL:
mac->forced_speed_duplex = ADVERTISE_100_FULL;
break;
case SPEED_1000 + DUPLEX_FULL:
mac->autoneg = 1;
adapter->hw.phy.autoneg_advertised = ADVERTISE_1000_FULL;
break;
case SPEED_1000 + DUPLEX_HALF: /* not supported */
default:
goto err_inval;
}
/* clear MDI, MDI(-X) override is only allowed when autoneg enabled */
adapter->hw.phy.mdix = AUTO_ALL_MODES;
return 0;
err_inval:
e_err("Unsupported Speed/Duplex configuration\n");
return -EINVAL;
}
/**
* e1000e_ptp_init - initialize PTP for devices which support it
* @adapter: board private structure
*
* This function performs the required steps for enabling PTP support.
* If PTP support has already been loaded it simply calls the cyclecounter
* init routine and exits.
**/
void e1000e_ptp_init(struct e1000_adapter *adapter)
{
struct e1000_hw *hw = &adapter->hw;
adapter->ptp_clock = NULL;
if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP))
return;
adapter->ptp_clock_info = e1000e_ptp_clock_info;
snprintf(adapter->ptp_clock_info.name,
sizeof(adapter->ptp_clock_info.name), "%pm",
adapter->netdev->perm_addr);
switch (hw->mac.type) {
case e1000_pch2lan:
case e1000_pch_lpt:
case e1000_pch_spt:
if (((hw->mac.type != e1000_pch_lpt) &&
(hw->mac.type != e1000_pch_spt)) ||
(er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_SYSCFI)) {
adapter->ptp_clock_info.max_adj = 24000000 - 1;
break;
}
/* fall-through */
case e1000_82574:
case e1000_82583:
adapter->ptp_clock_info.max_adj = 600000000 - 1;
break;
default:
break;
}
INIT_DELAYED_WORK(&adapter->systim_overflow_work,
e1000e_systim_overflow_work);
schedule_delayed_work(&adapter->systim_overflow_work,
E1000_SYSTIM_OVERFLOW_PERIOD);
adapter->ptp_clock = ptp_clock_register(&adapter->ptp_clock_info,
pci_dev_to_dev(adapter->pdev));
if (IS_ERR(adapter->ptp_clock)) {
adapter->ptp_clock = NULL;
e_err("ptp_clock_register failed\n");
} else {
e_info("registered PHC clock\n");
}
}
static bool reg_pattern_test(struct e1000_adapter *adapter, u64 *data,
int reg, int offset, u32 mask, u32 write)
{
u32 pat, val;
static const u32 test[] = {
0x5A5A5A5A, 0xA5A5A5A5, 0x00000000, 0xFFFFFFFF};
for (pat = 0; pat < ARRAY_SIZE(test); pat++) {
E1000_WRITE_REG_ARRAY(&adapter->hw, reg, offset,
(test[pat] & write));
val = E1000_READ_REG_ARRAY(&adapter->hw, reg, offset);
if (val != (test[pat] & write & mask)) {
e_err("pattern test reg %04X failed: got 0x%08X expected 0x%08X\n",
reg + offset, val, (test[pat] & write & mask));
*data = reg;
return 1;
}
}
return 0;
}
/**
* ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
* @adapter: board private structure to initialize
*
* Attempt to configure the interrupts using the best available
* capabilities of the hardware and the kernel.
**/
static void ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
{
struct ixgbe_hw *hw = &adapter->hw;
int vector, v_budget, err;
if (!(adapter->flags & IXGBE_FLAG_MSIX_CAPABLE))
goto try_msi;
/*
* It's easy to be greedy for MSI-X vectors, but it really
* doesn't do us much good if we have a lot more vectors
* than CPU's. So let's be conservative and only ask for
* (roughly) the same number of vectors as there are CPU's.
* The default is to use pairs of vectors.
*/
v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues);
v_budget = min_t(int, v_budget, num_online_cpus());
v_budget += NON_Q_VECTORS;
/*
* At the same time, hardware can only support a maximum of
* hw.mac->max_msix_vectors vectors. With features
* such as RSS and VMDq, we can easily surpass the number of Rx and Tx
* descriptor queues supported by our device. Thus, we cap it off in
* those rare cases where the cpu count also exceeds our vector limit.
*/
v_budget = min_t(int, v_budget, hw->mac.max_msix_vectors);
/* A failure in MSI-X entry allocation isn't fatal, but it does
* mean we disable MSI-X capabilities of the adapter. */
adapter->msix_entries = kcalloc(v_budget,
sizeof(struct msix_entry), GFP_KERNEL);
if (adapter->msix_entries) {
for (vector = 0; vector < v_budget; vector++)
adapter->msix_entries[vector].entry = vector;
ixgbe_acquire_msix_vectors(adapter, v_budget);
if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
return;
}
try_msi:
/* disable DCB if number of TCs exceeds 1 */
if (netdev_get_num_tc(adapter->netdev) > 1) {
e_err(probe, "num TCs exceeds number of queues - disabling DCB\n");
netdev_reset_tc(adapter->netdev);
if (adapter->hw.mac.type == ixgbe_mac_82598EB)
adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
adapter->temp_dcb_cfg.pfc_mode_enable = false;
adapter->dcb_cfg.pfc_mode_enable = false;
}
adapter->dcb_cfg.num_tcs.pg_tcs = 1;
adapter->dcb_cfg.num_tcs.pfc_tcs = 1;
/* disable SR-IOV */
ixgbe_disable_sriov(adapter);
/* disable RSS */
adapter->ring_feature[RING_F_RSS].limit = 1;
ixgbe_set_num_queues(adapter);
adapter->num_q_vectors = 1;
if (!(adapter->flags & IXGBE_FLAG_MSI_CAPABLE))
return;
err = pci_enable_msi(adapter->pdev);
if (err) {
netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
"Unable to allocate MSI interrupt, "
"falling back to legacy. Error: %d\n", err);
return;
}
adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
}
/**
* ixgbe_fcoe_ddp_setup - called to set up ddp context
* @netdev: the corresponding net_device
* @xid: the exchange id requesting ddp
* @sgl: the scatter-gather list for this request
* @sgc: the number of scatter-gather items
*
* Returns : 1 for success and 0 for no ddp
*/
static int ixgbe_fcoe_ddp_setup(struct net_device *netdev, u16 xid,
struct scatterlist *sgl, unsigned int sgc,
int target_mode)
{
struct ixgbe_adapter *adapter;
struct ixgbe_hw *hw;
struct ixgbe_fcoe *fcoe;
struct ixgbe_fcoe_ddp *ddp;
struct ixgbe_fcoe_ddp_pool *ddp_pool;
struct scatterlist *sg;
unsigned int i, j, dmacount;
unsigned int len;
static const unsigned int bufflen = IXGBE_FCBUFF_MIN;
unsigned int firstoff = 0;
unsigned int lastsize;
unsigned int thisoff = 0;
unsigned int thislen = 0;
u32 fcbuff, fcdmarw, fcfltrw, fcrxctl;
dma_addr_t addr = 0;
if (!netdev || !sgl)
return 0;
adapter = netdev_priv(netdev);
if (xid >= IXGBE_FCOE_DDP_MAX) {
e_warn(drv, "xid=0x%x out-of-range\n", xid);
return 0;
}
/* no DDP if we are already down or resetting */
if (test_bit(__IXGBE_DOWN, &adapter->state) ||
test_bit(__IXGBE_RESETTING, &adapter->state))
return 0;
fcoe = &adapter->fcoe;
ddp = &fcoe->ddp[xid];
if (ddp->sgl) {
e_err(drv, "xid 0x%x w/ non-null sgl=%p nents=%d\n",
xid, ddp->sgl, ddp->sgc);
return 0;
}
ixgbe_fcoe_clear_ddp(ddp);
if (!fcoe->ddp_pool) {
e_warn(drv, "No ddp_pool resources allocated\n");
return 0;
}
ddp_pool = per_cpu_ptr(fcoe->ddp_pool, get_cpu());
if (!ddp_pool->pool) {
e_warn(drv, "xid=0x%x no ddp pool for fcoe\n", xid);
goto out_noddp;
}
/* setup dma from scsi command sgl */
dmacount = dma_map_sg(&adapter->pdev->dev, sgl, sgc, DMA_FROM_DEVICE);
if (dmacount == 0) {
e_err(drv, "xid 0x%x DMA map error\n", xid);
goto out_noddp;
}
/* alloc the udl from per cpu ddp pool */
ddp->udl = dma_pool_alloc(ddp_pool->pool, GFP_ATOMIC, &ddp->udp);
if (!ddp->udl) {
e_err(drv, "failed allocated ddp context\n");
goto out_noddp_unmap;
}
ddp->pool = ddp_pool->pool;
ddp->sgl = sgl;
ddp->sgc = sgc;
j = 0;
for_each_sg(sgl, sg, dmacount, i) {
addr = sg_dma_address(sg);
len = sg_dma_len(sg);
while (len) {
/* max number of buffers allowed in one DDP context */
if (j >= IXGBE_BUFFCNT_MAX) {
ddp_pool->noddp++;
goto out_noddp_free;
}
/* get the offset of length of current buffer */
thisoff = addr & ((dma_addr_t)bufflen - 1);
thislen = min((bufflen - thisoff), len);
/*
* all but the 1st buffer (j == 0)
* must be aligned on bufflen
*/
if ((j != 0) && (thisoff))
goto out_noddp_free;
/*
* all but the last buffer
* ((i == (dmacount - 1)) && (thislen == len))
* must end at bufflen
*/
if (((i != (dmacount - 1)) || (thislen != len))
&& ((thislen + thisoff) != bufflen))
goto out_noddp_free;
ddp->udl[j] = (u64)(addr - thisoff);
/* only the first buffer may have none-zero offset */
if (j == 0)
firstoff = thisoff;
len -= thislen;
addr += thislen;
j++;
}
}
static int e1000_reg_test(struct e1000_adapter *adapter, u64 *data)
{
struct e1000_hw *hw = &adapter->hw;
struct e1000_mac_info *mac = &adapter->hw.mac;
u32 value;
u32 before;
u32 after;
u32 i;
u32 toggle;
u32 mask;
u32 wlock_mac = 0;
/*
* The status register is Read Only, so a write should fail.
* Some bits that get toggled are ignored.
*/
switch (mac->type) {
/* there are several bits on newer hardware that are r/w */
case e1000_82571:
case e1000_82572:
case e1000_80003es2lan:
toggle = 0x7FFFF3FF;
break;
default:
toggle = 0x7FFFF033;
break;
}
before = er32(STATUS);
value = (er32(STATUS) & toggle);
ew32(STATUS, toggle);
after = er32(STATUS) & toggle;
if (value != after) {
e_err("failed STATUS register test got: 0x%08X expected: 0x%08X\n",
after, value);
*data = 1;
return 1;
}
/* restore previous status */
ew32(STATUS, before);
if (!(adapter->flags & FLAG_IS_ICH)) {
REG_PATTERN_TEST(E1000_FCAL, 0xFFFFFFFF, 0xFFFFFFFF);
REG_PATTERN_TEST(E1000_FCAH, 0x0000FFFF, 0xFFFFFFFF);
REG_PATTERN_TEST(E1000_FCT, 0x0000FFFF, 0xFFFFFFFF);
REG_PATTERN_TEST(E1000_VET, 0x0000FFFF, 0xFFFFFFFF);
}
REG_PATTERN_TEST(E1000_RDTR, 0x0000FFFF, 0xFFFFFFFF);
REG_PATTERN_TEST(E1000_RDBAH(0), 0xFFFFFFFF, 0xFFFFFFFF);
REG_PATTERN_TEST(E1000_RDLEN(0), 0x000FFF80, 0x000FFFFF);
REG_PATTERN_TEST(E1000_RDH(0), 0x0000FFFF, 0x0000FFFF);
REG_PATTERN_TEST(E1000_RDT(0), 0x0000FFFF, 0x0000FFFF);
REG_PATTERN_TEST(E1000_FCRTH, 0x0000FFF8, 0x0000FFF8);
REG_PATTERN_TEST(E1000_FCTTV, 0x0000FFFF, 0x0000FFFF);
REG_PATTERN_TEST(E1000_TIPG, 0x3FFFFFFF, 0x3FFFFFFF);
REG_PATTERN_TEST(E1000_TDBAH(0), 0xFFFFFFFF, 0xFFFFFFFF);
REG_PATTERN_TEST(E1000_TDLEN(0), 0x000FFF80, 0x000FFFFF);
REG_SET_AND_CHECK(E1000_RCTL, 0xFFFFFFFF, 0x00000000);
before = ((adapter->flags & FLAG_IS_ICH) ? 0x06C3B33E : 0x06DFB3FE);
REG_SET_AND_CHECK(E1000_RCTL, before, 0x003FFFFB);
REG_SET_AND_CHECK(E1000_TCTL, 0xFFFFFFFF, 0x00000000);
REG_SET_AND_CHECK(E1000_RCTL, before, 0xFFFFFFFF);
REG_PATTERN_TEST(E1000_RDBAL(0), 0xFFFFFFF0, 0xFFFFFFFF);
if (!(adapter->flags & FLAG_IS_ICH))
REG_PATTERN_TEST(E1000_TXCW, 0xC000FFFF, 0x0000FFFF);
REG_PATTERN_TEST(E1000_TDBAL(0), 0xFFFFFFF0, 0xFFFFFFFF);
REG_PATTERN_TEST(E1000_TIDV, 0x0000FFFF, 0x0000FFFF);
mask = 0x8003FFFF;
switch (mac->type) {
case e1000_ich10lan:
case e1000_pchlan:
case e1000_pch2lan:
case e1000_pch_lpt:
mask |= (1 << 18);
break;
default:
break;
}
if (mac->type == e1000_pch_lpt)
wlock_mac = (er32(FWSM) & E1000_FWSM_WLOCK_MAC_MASK) >>
E1000_FWSM_WLOCK_MAC_SHIFT;
for (i = 0; i < mac->rar_entry_count; i++) {
/* Cannot test write-protected SHRAL[n] registers */
if ((wlock_mac == 1) || (wlock_mac && (i > wlock_mac)))
continue;
REG_PATTERN_TEST_ARRAY(E1000_RA, ((i << 1) + 1),
mask, 0xFFFFFFFF);
}
for (i = 0; i < mac->mta_reg_count; i++)
REG_PATTERN_TEST_ARRAY(E1000_MTA, i, 0xFFFFFFFF, 0xFFFFFFFF);
*data = 0;
return 0;
}
static int e1000_set_settings(struct net_device *netdev,
struct ethtool_cmd *ecmd)
{
struct e1000_adapter *adapter = netdev_priv(netdev);
struct e1000_hw *hw = &adapter->hw;
/*
* When SoL/IDER sessions are active, autoneg/speed/duplex
* cannot be changed
*/
if (hw->phy.ops.check_reset_block &&
hw->phy.ops.check_reset_block(hw)) {
e_err("Cannot change link characteristics when SoL/IDER is active.\n");
return -EINVAL;
}
/*
* MDI setting is only allowed when autoneg enabled because
* some hardware doesn't allow MDI setting when speed or
* duplex is forced.
*/
if (ecmd->eth_tp_mdix_ctrl) {
if (hw->phy.media_type != e1000_media_type_copper)
return -EOPNOTSUPP;
if ((ecmd->eth_tp_mdix_ctrl != ETH_TP_MDI_AUTO) &&
(ecmd->autoneg != AUTONEG_ENABLE)) {
e_err("forcing MDI/MDI-X state is not supported when link speed and/or duplex are forced\n");
return -EINVAL;
}
}
while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
usleep_range(1000, 2000);
if (ecmd->autoneg == AUTONEG_ENABLE) {
hw->mac.autoneg = 1;
if (hw->phy.media_type == e1000_media_type_fiber)
hw->phy.autoneg_advertised = ADVERTISED_1000baseT_Full |
ADVERTISED_FIBRE |
ADVERTISED_Autoneg;
else
hw->phy.autoneg_advertised = ecmd->advertising |
ADVERTISED_TP |
ADVERTISED_Autoneg;
ecmd->advertising = hw->phy.autoneg_advertised;
if (adapter->fc_autoneg)
hw->fc.requested_mode = e1000_fc_default;
} else {
u32 speed = ethtool_cmd_speed(ecmd);
/* calling this overrides forced MDI setting */
if (e1000_set_spd_dplx(adapter, speed, ecmd->duplex)) {
clear_bit(__E1000_RESETTING, &adapter->state);
return -EINVAL;
}
}
/* MDI-X => 2; MDI => 1; Auto => 3 */
if (ecmd->eth_tp_mdix_ctrl) {
/*
* fix up the value for auto (3 => 0) as zero is mapped
* internally to auto
*/
if (ecmd->eth_tp_mdix_ctrl == ETH_TP_MDI_AUTO)
hw->phy.mdix = AUTO_ALL_MODES;
else
hw->phy.mdix = ecmd->eth_tp_mdix_ctrl;
}
/* reset the link */
if (netif_running(adapter->netdev)) {
e1000e_down(adapter);
e1000e_up(adapter);
} else
e1000e_reset(adapter);
clear_bit(__E1000_RESETTING, &adapter->state);
return 0;
}
static u8 ixgbe_dcbnl_set_state(struct net_device *netdev, u8 state)
{
u8 err = 0;
struct ixgbe_adapter *adapter = netdev_priv(netdev);
if (state > 0) {
/* Turn on DCB */
if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
goto out;
if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
e_err(drv, "Enable failed, needs MSI-X\n");
err = 1;
goto out;
}
if (netif_running(netdev))
netdev->netdev_ops->ndo_stop(netdev);
ixgbe_clear_interrupt_scheme(adapter);
switch (adapter->hw.mac.type) {
case ixgbe_mac_82598EB:
adapter->last_lfc_mode = adapter->hw.fc.current_mode;
adapter->hw.fc.requested_mode = ixgbe_fc_none;
break;
case ixgbe_mac_82599EB:
case ixgbe_mac_X540:
adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
break;
default:
break;
}
adapter->flags |= IXGBE_FLAG_DCB_ENABLED;
if (!netdev_get_num_tc(netdev))
ixgbe_setup_tc(netdev, MAX_TRAFFIC_CLASS);
ixgbe_init_interrupt_scheme(adapter);
if (netif_running(netdev))
netdev->netdev_ops->ndo_open(netdev);
} else {
/* Turn off DCB */
if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
if (netif_running(netdev))
netdev->netdev_ops->ndo_stop(netdev);
ixgbe_clear_interrupt_scheme(adapter);
adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
adapter->temp_dcb_cfg.pfc_mode_enable = false;
adapter->dcb_cfg.pfc_mode_enable = false;
adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
switch (adapter->hw.mac.type) {
case ixgbe_mac_82599EB:
case ixgbe_mac_X540:
adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
break;
default:
break;
}
ixgbe_setup_tc(netdev, 0);
ixgbe_init_interrupt_scheme(adapter);
if (netif_running(netdev))
netdev->netdev_ops->ndo_open(netdev);
}
}
out:
return err;
}
/**
* ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
* @adapter: board private structure to initialize
*
* Attempt to configure the interrupts using the best available
* capabilities of the hardware and the kernel.
**/
static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
{
struct ixgbe_hw *hw = &adapter->hw;
int err = 0;
int vector, v_budget;
/*
* It's easy to be greedy for MSI-X vectors, but it really
* doesn't do us much good if we have a lot more vectors
* than CPU's. So let's be conservative and only ask for
* (roughly) the same number of vectors as there are CPU's.
* The default is to use pairs of vectors.
*/
v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues);
v_budget = min_t(int, v_budget, num_online_cpus());
v_budget += NON_Q_VECTORS;
/*
* At the same time, hardware can only support a maximum of
* hw.mac->max_msix_vectors vectors. With features
* such as RSS and VMDq, we can easily surpass the number of Rx and Tx
* descriptor queues supported by our device. Thus, we cap it off in
* those rare cases where the cpu count also exceeds our vector limit.
*/
v_budget = min_t(int, v_budget, hw->mac.max_msix_vectors);
/* A failure in MSI-X entry allocation isn't fatal, but it does
* mean we disable MSI-X capabilities of the adapter. */
adapter->msix_entries = kcalloc(v_budget,
sizeof(struct msix_entry), GFP_KERNEL);
if (adapter->msix_entries) {
for (vector = 0; vector < v_budget; vector++)
adapter->msix_entries[vector].entry = vector;
ixgbe_acquire_msix_vectors(adapter, v_budget);
if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
goto out;
}
adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
e_err(probe,
"ATR is not supported while multiple "
"queues are disabled. Disabling Flow Director\n");
}
adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
adapter->atr_sample_rate = 0;
if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
ixgbe_disable_sriov(adapter);
err = ixgbe_set_num_queues(adapter);
if (err)
return err;
err = pci_enable_msi(adapter->pdev);
if (!err) {
adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
} else {
netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
"Unable to allocate MSI interrupt, "
"falling back to legacy. Error: %d\n", err);
/* reset err */
err = 0;
}
out:
return err;
}
