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2015-12-03i40evf: use correct typesMitch Williams1-1/+1
Don't use uint32_t type the kernel. Use u32 instead. No functional change. Change-ID: I77bbf3b6464edaef747c7104b43534032a4dba63 Signed-off-by: Mitch Williams <mitch.a.williams@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-03i40e: propagate properlyMitch Williams2-51/+76
i40e_sync_vsi_filters() is the surly teenager of this driver. It says it's going to report errors, but it doesn't actually do that most of the time. And when it does, it leaves a mess. Change this function to have a common exit point so it will properly release the busy lock on the VSI. Propagate errors to the callers. Finally, adjust a few callers to check for and deal with errors from this function. Change-ID: Ic6af4956491e72402ebb3c538a3c31a0ad7f8667 Signed-off-by: Mitch Williams <mitch.a.williams@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-03i40evf: don't use atomic allocationMitch Williams1-6/+6
These allocations don't need to be at atomic level. GFP_KERNEL is fine and they'll reduce stress on the allocator when the system is starved for memory. Change-ID: I3561d0399a681de0ad25291b6c848b224c1fde12 Signed-off-by: Mitch Williams <mitch.a.williams@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-03i40e: Fix memory leaks, sideband filter programmingKiran Patil2-10/+19
This patch fixes the memory leak which would be seen otherwise when user programs flow-director filter using ethtool (sideband filter programming). When ethtool is used to program flow directory filter, 'raw_buf' gets allocated and it is supposed to be freed as part of queue cleanup. But check of 'tx_buffer->skb' was preventing it from being freed. Change-ID: Ief4f0a1a32a653180498bf6e987c1b4342ab8923 Signed-off-by: Kiran Patil <kiran.patil@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-03i40e: Detection and recovery of TX queue hung logic moved to service_task ↵Kiran Patil5-13/+64
from tx_timeout This patch contains following changes: - detection and recovery logic (issue SW interrupt) has been moved to service_task from timeout function. - added some more debug info from tx_timeout. Logic to detect and recover TX queue hung is now two step process: - service_task detects TX queue hung and sets a bit(hung_detected) if it was not set. - if bit was set (means this is back-back hung condition detected), issue SW interrupt and clear the bit. - napi_poll clears the bit unconditionally since it cleans TX/RX queues. Change-ID: Ieed03a48927c845a988b3ff375090bf37caeb903 Signed-off-by: Kiran Patil <kiran.patil@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-03i40evf: remove duplicate stringMitch Williams1-1/+0
We already print the driver info string in probe, so don't print it again in init. No need to repeat. No need to repeat. Change-ID: Ief597997f580a8c54d5950e3a84c29f2075be66b Signed-off-by: Mitch Williams <mitch.a.williams@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-03i40evf: set real num queuesMitch Williams1-1/+2
Use the helper function to set the real number of RX queues, and also set the real number of TX queues. Change-ID: I67982799de3f248fb4158ccdc9b1a74385f42ddd Signed-off-by: Mitch Williams <mitch.a.williams@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-03i40evf: increase max number of queuesMitch Williams2-4/+2
Future devices will allow for more queue pairs, so allocate a netdev that can handle them. While we're at it, get rid of the separate MAX_TX/MAX_RX defines. Since we always get matched queue pairs, having these makes no sense. Change-ID: I0e3556cd9a962506e509eb7c0afa36b329e8cb51 Signed-off-by: Mitch Williams <mitch.a.williams@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-03sfc: use ALIGN macro for aligning frame sizesJarod Wilson1-1/+2
Don't open-code it. CC: Solarflare linux maintainers <linux-net-drivers@solarflare.com> CC: Shradha Shah <sshah@solarflare.com> CC: netdev@vger.kernel.org Signed-off-by: Jarod Wilson <jarod@redhat.com> Acked-by: Bert Kenward <bkenward@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03tcp: suppress too verbose messages in tcp_send_ack()Eric Dumazet3-11/+13
If tcp_send_ack() can not allocate skb, we properly handle this and setup a timer to try later. Use __GFP_NOWARN to avoid polluting syslog in the case host is under memory pressure, so that pertinent messages are not lost under a flood of useless information. sk_gfp_atomic() can use its gfp_mask argument (all callers currently were using GFP_ATOMIC before this patch) We rename sk_gfp_atomic() to sk_gfp_mask() to clearly express this function now takes into account its second argument (gfp_mask) Note that when tcp_transmit_skb() is called with clone_it set to false, we do not attempt memory allocations, so can pass a 0 gfp_mask, which most compilers can emit faster than a non zero or constant value. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03hv_netvsc: Eliminate vlan_tci from struct hv_netvsc_packetKY Srinivasan3-13/+12
Eliminate vlan_tci from struct hv_netvsc_packet. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03hv_netvsc: Eliminate status from struct hv_netvsc_packetKY Srinivasan4-22/+13
Eliminate status from struct hv_netvsc_packet. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03hv_netvsc: Eliminate xmit_more from struct hv_netvsc_packetKY Srinivasan4-9/+8
Eliminate xmit_more from struct hv_netvsc_packet. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03hv_netvsc: Eliminate completion_func from struct hv_netvsc_packetKY Srinivasan3-5/+0
Eliminate completion_func from struct hv_netvsc_packet. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03hv_netvsc: Eliminate is_data_pkt from struct hv_netvsc_packetKY Srinivasan4-9/+8
Eliminate is_data_pkt from struct hv_netvsc_packet. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03hv_netvsc: Eliminate send_completion_tid from struct hv_netvsc_packetKY Srinivasan4-33/+19
Eliminate send_completion_tid from struct hv_netvsc_packet. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03hv_netvsc: Eliminate page_buf from struct hv_netvsc_packetKY Srinivasan4-31/+35
Eliminate page_buf from struct hv_netvsc_packet. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03hv_netvsc: remove locking in netvsc_send()Vitaly Kuznetsov2-9/+0
Packet scheduler guarantees there won't be multiple senders for the same queue and as we use q_idx for multi_send_data the spinlock is redundant. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03hv_netvsc: move subchannel existence check to netvsc_select_queue()Vitaly Kuznetsov3-18/+5
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03hv_netvsc: Don't ask for additional head room in the skbKY Srinivasan3-20/+17
The rndis header is 116 bytes big and can be placed in the default head room that will be available in the skb. Since the netvsc packet is less than 48 bytes, we can use the skb control buffer for the netvsc packet. With these changes we don't need to ask for additional head room. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03hv_netvsc: Eliminate send_completion_ctx from struct hv_netvsc_packetKY Srinivasan3-4/+1
Eliminate send_completion_ctx from struct hv_netvsc_packet. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03hv_netvsc: Eliminate send_completion from struct hv_netvsc_packetKY Srinivasan4-7/+6
Eliminate send_completion from struct hv_netvsc_packet. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03hv_netvsc: Eliminatte the data field from struct hv_netvsc_packetKY Srinivasan4-10/+14
Eliminatte the data field from struct hv_netvsc_packet. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03hv_netvsc: Eliminate rndis_msg pointer from hv_netvsc_packet structureKY Srinivasan4-14/+13
Eliminate rndis_msg pointer from hv_netvsc_packet structure. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03hv_netvsc: Eliminate the channel field in hv_netvsc_packet structureKY Srinivasan4-21/+35
Eliminate the channel field in hv_netvsc_packet structure. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03hv_netvsc: Rearrange the hv_negtvsc_packet to be space efficientKY Srinivasan1-8/+10
Rearrange the elements of struct hv_negtvsc_packet for optimal layout - eliminate unnecessary padding. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-03hv_netvsc: Resize some of the variables in hv_netvsc_packetKY Srinivasan1-7/+7
As part of reducing the size of the hv_netvsc_packet, resize some of the variables based on their usage. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-02i40e: remove unused argumentJesse Brandeburg4-12/+18
With the final edition of the patches to remove sleeps from the driver's entry points, the grab_rtnl argument is no longer needed, so partially revert the commit that added it. Change-ID: Ib9778476242586cc9e58b670f5f48d415cb59003 Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-02i40e: fix: do not sleep in netdev_opsJesse Brandeburg1-24/+20
The driver was being called by VLAN, bonding, teaming operations that expected to be able to hold locks like rcu_read_lock(). This causes the driver to be held to the requirement to not sleep, and was found by the kernel debug options for checking sleep inside critical section, and the locking validator. Change-ID: Ibc68c835f5ffa8ffe0638ffe910a66fc5649a7f7 Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-02i40e/i40evf: Bump i40e version to 1.4.4 and i40evf to 1.4.1Catherine Sullivan2-2/+2
Bump. Change-ID: I00ebbb2e5e5572f947502b8f6db4d94f666d6b14 Signed-off-by: Catherine Sullivan <catherine.sullivan@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-02i40evf: allocate ring structs dynamicallyMitch Williams5-41/+40
Instead of awkwardly keeping a fixed array of pointers in the adapter struct and then allocating ring structs individually, just keep a single pointer and allocate a single blob for the arrays. This simplifies code, shrinks the adapter structure, and future-proofs the driver by not limiting the number of rings we can handle. Change-ID: I31334ff911a6474954232cfe4bc98ccca3c769ff Signed-off-by: Mitch Williams <mitch.a.williams@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-02i40evf: allocate queue vectors dynamicallyMitch Williams4-26/+21
Change the queue_vector array from a statically-sized member of the adapter structure to a dynamically-allocated and -sized array. This reduces the size of the adapter structure, and allows us to support any number of queue vectors in the future without changing the code. Change-ID: I08dc622cb2f2ad01e832e51c1ad9b86524730693 Signed-off-by: Mitch Williams <mitch.a.williams@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-02i40evf: quoth the VF driver, NevermoreMitch Williams1-0/+8
If, upon a midnight dreary, the PF returns ERR_PARAM when the VF is requesting resources, that's fatal. Either the firmware or NVM is badly, badly misconfigured, or this VF has been disabled due to a previous VF driver sending a bunch of bogus messages. Either way, there is no recovery from this. Don't ponder weak and weary, just quit. Change-ID: I09d9f16cc4ee7fec3b57646a289d33838c1c5bf5 Signed-off-by: Mitch Williams <mitch.a.williams@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-02i40e: make error message more usefulMitch Williams1-2/+2
If we get an invalid message from a VF, we should tell the user which VF is being naughty, rather than making them guess. Change-ID: I9252cef7baea3d8584043ed6ff12619a94e2f99c Signed-off-by: Mitch Williams <mitch.a.williams@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-02i40e: fix confusing messageHelin Zhang1-1/+2
This patch fixes the confusing kernel message of enabled RSS size, by reporting it together with the hardware maximum RSS size. Change-ID: I64864dbfbc13beccc180a7871680def1f3d5a339 Signed-off-by: Helin Zhang <helin.zhang@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-02i40e: Update error messagingCarolyn Wyborny1-6/+10
This patch fixes an issue where adminq init failures always provided a message that NVM was newer than expected. This is not always the case for init_adminq failures. Without this patch, if adminq init fails for any reason, newer NVM message would be given. This problem is fixed by adding a check for that specific error condition and a different hopefully helpful message otherwise. Change-ID: Iaeaebee4e398989eae40bb70f943ab66a3a521a5 Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-02i40evf: add new fields to store user configuration of RSSHelin Zhang3-16/+54
This patch adds new fields to i40e_vsi to store user configured RSS config data and code to use it. Change-ID: Ic5d3db8d9df52182b560248f8cdca9c5c7546879 Signed-off-by: Helin Zhang <helin.zhang@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-02i40evf: create a generic get RSS functionHelin Zhang3-13/+121
There are two ways to get RSS, this patch implements two functions with the same input parameters, and creates a more generic function for getting RSS configuration. Change-ID: I12d3b712c21455d47dd0a5aae58fc9b7c680db59 Signed-off-by: Helin Zhang <helin.zhang@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-02i40evf: create a generic config RSS functionHelin Zhang3-70/+130
There are two ways to configure RSS, this patch adjusts those two functions with the same input parameters, and creates a more generic function for configuring RSS. Change-ID: Iace73bdeba4831909979bef221011060ab327f71 Signed-off-by: Helin Zhang <helin.zhang@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-02i40evf: rename VF adapter specific RSS functionHelin Zhang1-5/+5
This patch renames old VF adapter specific RSS function to clarify its scope. Change-ID: Ie5253083a44c677ebb7709a8a3a18402ad2dc6a6 Signed-off-by: Helin Zhang <helin.zhang@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-02i40e/i40evf: prefetch skb data on transmitJesse Brandeburg2-0/+6
Issue a prefetch for data early in the transmit path. This should not be generally needed for Tx traffic, but it helps immensely for pktgen workloads and should help for forwarding workloads as well. Change-ID: Iefee870c20599e0c4240e1d8637e4f16b625f83a Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-02i40e/i40evf: Fix RS bit update in Tx path and disable force WB workaroundAnjali Singhai Jain2-43/+77
This patch fixes the issue of forcing WB too often causing us to not benefit from NAPI. Without this patch we were forcing WB/arming interrupt too often taking away the benefits of NAPI and causing a performance impact. With this patch we disable force WB in the clean routine for X710 and XL710 adapters. X722 adapters do not enable interrupt to force a WB and benefit from WB_ON_ITR and hence force WB is left enabled for those adapters. For XL710 and X710 adapters if we have less than 4 packets pending a software Interrupt triggered from service task will force a WB. This patch also changes the conditions for setting RS bit as described in code comments. This optimizes when the HW does a tail bump amd when it does a WB. It also optimizes when we do a wmb. Change-ID: Id831e1ae7d3e2ec3f52cd0917b41ce1d22d75d9d Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-02i40e: rename rss_size to alloc_rss_size in i40e_pfHelin Zhang2-17/+22
This patch renames rss_size to alloc_rss_size in i40e_pf, which is clearer and avoids confusion. It also adds comments to the other related structure members to help clarify usage. Change-ID: Ia90090609d006ab589cb639975bb8a0af795d16f Signed-off-by: Helin Zhang <helin.zhang@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-02i40e: add new fields to store user configurationHelin Zhang3-17/+68
This patch adds new fields to i40e_vsi to store user configured RSS config data and code to use it. Signed-off-by: Helin Zhang <helin.zhang@intel.com> Change-ID: I73886469dca9e9f6b16d842182a87f3f4009f95d Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-12-01isdn: remove spellcaster driverArnd Bergmann18-3136/+0
The 'sc' ISDN driver relies on using readl() to access ISA I/O memory. This has been deprecated and produced warnings since linux-2.3.23, disabled by default since 2.4.10 and finally removed in 2.6.5. I found this because the compiling the driver for ARM produces a warning: In file included from ../drivers/isdn/sc/includes.h:8:0, from ../drivers/isdn/sc/init.c:13: ../arch/arm/include/asm/io.h:115:21: note: expected 'const volatile void *' but argument is of type 'long unsigned int' It is pretty clear that this driver has not been used for a long time and there is no point fixing it now, so let's remove it. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-01stmmac: support Reg_9 to get HW level informationGiuseppe CAVALLARO4-0/+173
For GMAC newer than 3.40a there is a new register (Reg_9) that provides the status of all modules of the transmit and receive paths and FIFO status. These can be exposed via ethtool. Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-01qede: Add support for {get, set}_pauseparamSudarsana Kalluru1-0/+60
Signed-off-by: Sudarsana Kalluru <Sudarsana.Kalluru@qlogic.com> Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-01qede: Add support for nway_resetSudarsana Kalluru1-0/+25
Signed-off-by: Sudarsana Kalluru <Sudarsana.Kalluru@qlogic.com> Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-01qede: Add support for set_phys_idSudarsana Kalluru1-0/+29
Signed-off-by: Sudarsana Kalluru <Sudarsana.Kalluru@qlogic.com> Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-01qed: Add support for changing LED stateSudarsana Kalluru5-0/+81
Physical LEDs are being controlled by the management FW. This adds the qed functionality required to request management FW to change the LED configuration, as well as the necessary APIs for this functionality to later be used by the protocol drivers. Signed-off-by: Sudarsana Kalluru <Sudarsana.Kalluru@qlogic.com> Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>