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i40e: enable mc magic pkt wakeup during power down 

This patch adds a call to the mac_address_write admin q function during
power down to update the PRTPM_SAH/SAL registers with the MC_MAG_EN bit
thus enabling multicast magic packet wakeup.

A FW workaround is needed to write the multicast magic wake up enable
bit in the PRTPM_SAH register. The FW expects the mac address write
admin q cmd to be called first with one of the WRITE_TYPE_LAA flags
and then with the multicast relevant flags.

*Note: This solution only works for X722 devices currently. A PFR will
clear the previously mentioned bit by default, but X722 has support for a
WOL_PRESERVE_ON_PFR flag which prevents the bit from being cleared. Once
other devices support this flag, this solution should work as well.

Change-ID: I51bd5b8535bd9051c2676e27c999c1657f786827
Signed-off-by: Joshua Hay <joshua.a.hay@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Joshua Hay 2016-12-12 15:44:08 -08:00 committed by Jeff Kirsher
parent a410c821c0
commit 1d68005db4
3 changed files with 67 additions and 10 deletions
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1
drivers/net/ethernet/intel/i40e/i40e.h
View File

@ -348,6 +348,7 @@ struct i40e_pf {
#define I40E_FLAG_TRUE_PROMISC_SUPPORT BIT_ULL(51)
#define I40E_FLAG_HAVE_CRT_RETIMER BIT_ULL(52)
#define I40E_FLAG_PTP_L4_CAPABLE BIT_ULL(53)
#define I40E_FLAG_WOL_MC_MAGIC_PKT_WAKE BIT_ULL(54)
/* tracks features that get auto disabled by errors */
u64 auto_disable_flags;

2
drivers/net/ethernet/intel/i40e/i40e_adminq_cmd.h
View File

@ -538,6 +538,8 @@ I40E_CHECK_STRUCT_LEN(24, i40e_aqc_mac_address_read_data);
/* Manage MAC Address Write Command (0x0108) */
struct i40e_aqc_mac_address_write {
__le16 command_flags;
#define I40E_AQC_MC_MAG_EN 0x0100
#define I40E_AQC_WOL_PRESERVE_ON_PFR 0x0200
#define I40E_AQC_WRITE_TYPE_LAA_ONLY 0x0000
#define I40E_AQC_WRITE_TYPE_LAA_WOL 0x4000
#define I40E_AQC_WRITE_TYPE_PORT 0x8000

74
drivers/net/ethernet/intel/i40e/i40e_main.c
View File

@ -8815,16 +8815,17 @@ static int i40e_sw_init(struct i40e_pf *pf)
}
#endif /* CONFIG_PCI_IOV */
if (pf->hw.mac.type == I40E_MAC_X722) {
pf->flags |= I40E_FLAG_RSS_AQ_CAPABLE |
I40E_FLAG_128_QP_RSS_CAPABLE |
I40E_FLAG_HW_ATR_EVICT_CAPABLE |
I40E_FLAG_OUTER_UDP_CSUM_CAPABLE |
I40E_FLAG_WB_ON_ITR_CAPABLE |
I40E_FLAG_MULTIPLE_TCP_UDP_RSS_PCTYPE |
I40E_FLAG_NO_PCI_LINK_CHECK |
I40E_FLAG_USE_SET_LLDP_MIB |
I40E_FLAG_GENEVE_OFFLOAD_CAPABLE |
I40E_FLAG_PTP_L4_CAPABLE;
pf->flags |= I40E_FLAG_RSS_AQ_CAPABLE
| I40E_FLAG_128_QP_RSS_CAPABLE
| I40E_FLAG_HW_ATR_EVICT_CAPABLE
| I40E_FLAG_OUTER_UDP_CSUM_CAPABLE
| I40E_FLAG_WB_ON_ITR_CAPABLE
| I40E_FLAG_MULTIPLE_TCP_UDP_RSS_PCTYPE
| I40E_FLAG_NO_PCI_LINK_CHECK
| I40E_FLAG_USE_SET_LLDP_MIB
| I40E_FLAG_GENEVE_OFFLOAD_CAPABLE
| I40E_FLAG_PTP_L4_CAPABLE
| I40E_FLAG_WOL_MC_MAGIC_PKT_WAKE;
} else if ((pf->hw.aq.api_maj_ver > 1) ||
((pf->hw.aq.api_maj_ver == 1) &&
(pf->hw.aq.api_min_ver > 4))) {
@ -11740,6 +11741,53 @@ static void i40e_pci_error_resume(struct pci_dev *pdev)
rtnl_unlock();
}
/**
* i40e_enable_mc_magic_wake - enable multicast magic packet wake up
* using the mac_address_write admin q function
* @pf: pointer to i40e_pf struct
**/
static void i40e_enable_mc_magic_wake(struct i40e_pf *pf)
{
struct i40e_hw *hw = &pf->hw;
i40e_status ret;
u8 mac_addr[6];
u16 flags = 0;
/* Get current MAC address in case it's an LAA */
if (pf->vsi[pf->lan_vsi] && pf->vsi[pf->lan_vsi]->netdev) {
ether_addr_copy(mac_addr,
pf->vsi[pf->lan_vsi]->netdev->dev_addr);
} else {
dev_err(&pf->pdev->dev,
"Failed to retrieve MAC address; using default\n");
ether_addr_copy(mac_addr, hw->mac.addr);
}
/* The FW expects the mac address write cmd to first be called with
* one of these flags before calling it again with the multicast
* enable flags.
*/
flags = I40E_AQC_WRITE_TYPE_LAA_WOL;
if (hw->func_caps.flex10_enable && hw->partition_id != 1)
flags = I40E_AQC_WRITE_TYPE_LAA_ONLY;
ret = i40e_aq_mac_address_write(hw, flags, mac_addr, NULL);
if (ret) {
dev_err(&pf->pdev->dev,
"Failed to update MAC address registers; cannot enable Multicast Magic packet wake up");
return;
}
flags = I40E_AQC_MC_MAG_EN
| I40E_AQC_WOL_PRESERVE_ON_PFR
| I40E_AQC_WRITE_TYPE_UPDATE_MC_MAG;
ret = i40e_aq_mac_address_write(hw, flags, mac_addr, NULL);
if (ret)
dev_err(&pf->pdev->dev,
"Failed to enable Multicast Magic Packet wake up\n");
}
/**
* i40e_shutdown - PCI callback for shutting down
* @pdev: PCI device information struct
@ -11762,6 +11810,9 @@ static void i40e_shutdown(struct pci_dev *pdev)
cancel_work_sync(&pf->service_task);
i40e_fdir_teardown(pf);
if (pf->wol_en && (pf->flags & I40E_FLAG_WOL_MC_MAGIC_PKT_WAKE))
i40e_enable_mc_magic_wake(pf);
rtnl_lock();
i40e_prep_for_reset(pf);
rtnl_unlock();
@ -11793,6 +11844,9 @@ static int i40e_suspend(struct pci_dev *pdev, pm_message_t state)
set_bit(__I40E_SUSPENDED, &pf->state);
set_bit(__I40E_DOWN, &pf->state);
if (pf->wol_en && (pf->flags & I40E_FLAG_WOL_MC_MAGIC_PKT_WAKE))
i40e_enable_mc_magic_wake(pf);
rtnl_lock();
i40e_prep_for_reset(pf);
rtnl_unlock();