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2014-01-25Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds24-105/+117
Pull networking updates from David Miller: 1) BPF debugger and asm tool by Daniel Borkmann. 2) Speed up create/bind in AF_PACKET, also from Daniel Borkmann. 3) Correct reciprocal_divide and update users, from Hannes Frederic Sowa and Daniel Borkmann. 4) Currently we only have a "set" operation for the hw timestamp socket ioctl, add a "get" operation to match. From Ben Hutchings. 5) Add better trace events for debugging driver datapath problems, also from Ben Hutchings. 6) Implement auto corking in TCP, from Eric Dumazet. Basically, if we have a small send and a previous packet is already in the qdisc or device queue, defer until TX completion or we get more data. 7) Allow userspace to manage ipv6 temporary addresses, from Jiri Pirko. 8) Add a qdisc bypass option for AF_PACKET sockets, from Daniel Borkmann. 9) Share IP header compression code between Bluetooth and IEEE802154 layers, from Jukka Rissanen. 10) Fix ipv6 router reachability probing, from Jiri Benc. 11) Allow packets to be captured on macvtap devices, from Vlad Yasevich. 12) Support tunneling in GRO layer, from Jerry Chu. 13) Allow bonding to be configured fully using netlink, from Scott Feldman. 14) Allow AF_PACKET users to obtain the VLAN TPID, just like they can already get the TCI. From Atzm Watanabe. 15) New "Heavy Hitter" qdisc, from Terry Lam. 16) Significantly improve the IPSEC support in pktgen, from Fan Du. 17) Allow ipv4 tunnels to cache routes, just like sockets. From Tom Herbert. 18) Add Proportional Integral Enhanced packet scheduler, from Vijay Subramanian. 19) Allow openvswitch to mmap'd netlink, from Thomas Graf. 20) Key TCP metrics blobs also by source address, not just destination address. From Christoph Paasch. 21) Support 10G in generic phylib. From Andy Fleming. 22) Try to short-circuit GRO flow compares using device provided RX hash, if provided. From Tom Herbert. The wireless and netfilter folks have been busy little bees too. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (2064 commits) net/cxgb4: Fix referencing freed adapter ipv6: reallocate addrconf router for ipv6 address when lo device up fib_frontend: fix possible NULL pointer dereference rtnetlink: remove IFLA_BOND_SLAVE definition rtnetlink: remove check for fill_slave_info in rtnl_have_link_slave_info qlcnic: update version to 5.3.55 qlcnic: Enhance logic to calculate msix vectors. qlcnic: Refactor interrupt coalescing code for all adapters. qlcnic: Update poll controller code path qlcnic: Interrupt code cleanup qlcnic: Enhance Tx timeout debugging. qlcnic: Use bool for rx_mac_learn. bonding: fix u64 division rtnetlink: add missing IFLA_BOND_AD_INFO_UNSPEC sfc: Use the correct maximum TX DMA ring size for SFC9100 Add Shradha Shah as the sfc driver maintainer. net/vxlan: Share RX skb de-marking and checksum checks with ovs tulip: cleanup by using ARRAY_SIZE() ip_tunnel: clear IPCB in ip_tunnel_xmit() in case dst_link_failure() is called net/cxgb4: Don't retrieve stats during recovery ...
2014-01-22Merge branch 'for-linus' of ↵Linus Torvalds2-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial Pull trivial tree updates from Jiri Kosina: "Usual rocket science stuff from trivial.git" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (39 commits) neighbour.h: fix comment sched: Fix warning on make htmldocs caused by wait.h slab: struct kmem_cache is protected by slab_mutex doc: Fix typo in USB Gadget Documentation of/Kconfig: Spelling s/one/once/ mkregtable: Fix sscanf handling lp5523, lp8501: comment improvements thermal: rcar: comment spelling treewide: fix comments and printk msgs IXP4xx: remove '1 &&' from a condition check in ixp4xx_restart() Documentation: update /proc/uptime field description Documentation: Fix size parameter for snprintf arm: fix comment header and macro name asm-generic: uaccess: Spelling s/a ny/any/ mtd: onenand: fix comment header doc: driver-model/platform.txt: fix a typo drivers: fix typo in DEVTMPFS_MOUNT Kconfig help text doc: Fix typo (acces_process_vm -> access_process_vm) treewide: Fix typos in printk drivers/gpu/drm/qxl/Kconfig: reformat the help text ...
2014-01-18net: add build-time checks for msg->msg_name sizeSteffen Hurrle1-4/+4
This is a follow-up patch to f3d3342602f8bc ("net: rework recvmsg handler msg_name and msg_namelen logic"). DECLARE_SOCKADDR validates that the structure we use for writing the name information to is not larger than the buffer which is reserved for msg->msg_name (which is 128 bytes). Also use DECLARE_SOCKADDR consistently in sendmsg code paths. Signed-off-by: Steffen Hurrle <steffen@hurrle.net> Suggested-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-01-17Merge branch 'master' of ↵John W. Linville8-40/+91
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
2014-01-14net: Spelling s/transmition/transmission/Geert Uytterhoeven1-1/+1
Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-01-14Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-1/+1
2014-01-07NFC: digital: Set rf tech and crc functions when receiving a PSL_REQThierry Escande1-13/+31
This patch sets the correct rf tech value and crc functions in target mode when receiving a PSL_REQ, as done when receiving an ATR_REQ. Signed-off-by: Thierry Escande <thierry.escande@linux.intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-01-07NFC: digital: Set current target active on activate_target() callThierry Escande2-2/+28
The curr_protocol field of nfc_digital_dev structure used to determine if a target is currently active was set too soon, immediately when a target is found. This is not good since there is no other way than deactivate_target() to reset curr_protocol and if activate_target() is not called, the target remains active and it's not possible to put the device in poll mode anymore. With this patch curr_protocol is set when nfc core activates a target, puts a device up, or when an ATR_REQ is received in target mode. Signed-off-by: Thierry Escande <thierry.escande@linux.intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-01-07treewide: fix comments and printk msgsMasanari Iida1-1/+1
This patch fixed several typo in printk from various part of kernel source. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2014-01-07NFC: NCI: Add set_config APIAmitkumar Karwar1-0/+16
This API can be used by drivers to send their custom configuration using SET_CONFIG NCI command to the device. Signed-off-by: Amitkumar Karwar <akarwar@marvell.com> Signed-off-by: Bing Zhao <bzhao@marvell.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-01-07NFC: NCI: Add setup handlerAmitkumar Karwar1-0/+3
Some drivers require special configuration while initializing. This patch adds setup handler for this custom configuration. Signed-off-by: Amitkumar Karwar <akarwar@marvell.com> Signed-off-by: Bing Zhao <bzhao@marvell.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-01-07NFC: NCI: Don't reverse local general bytesAmitkumar Karwar1-6/+0
Local general bytes returned by nfc_get_local_general_bytes() are already in correct order. We don't need to reverse them. Remove local_gb[] local array as it's not needed any more. Signed-off-by: Amitkumar Karwar <akarwar@marvell.com> Signed-off-by: Bing Zhao <bzhao@marvell.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-01-05NFC: NCI: Cancel cmd_timer in nci_close_device()Amitkumar Karwar1-0/+2
nci_close_device() sends nci reset command to the device. If there is no response for this command, nci request timeout occurs first and then cmd timeout happens. Because command timer has started after sending the command. We are immediately flushing command workqueue after nci timeout. Later we will try to schedule cmd_work in command timer which leads to a crash. Cancel cmd_timer before flushing the workqueue to fix the problem. Signed-off-by: Amitkumar Karwar <akarwar@marvell.com> Signed-off-by: Bing Zhao <bzhao@marvell.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-01-04NFC: digital: Use NFC_NFCID3_MAXSIZE from nfc.hThierry Escande1-4/+2
This removes the declaration of NFCID3 size in digital_dep.c and now uses the one from nfc.h. This also removes a faulty and unneeded call to max(). Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Thierry Escande <thierry.escande@linux.intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-01-04NFC: digital: Fix incorrect use of ERR_PTR and PTR_ERR macrosThierry Escande1-2/+2
It's bad to use these macros when not dealing with error code. this patch changes calls to these macros with correct casts. Signed-off-by: Thierry Escande <thierry.escande@linux.intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-01-04NFC: Only warn on SE discovery errorSamuel Ortiz1-5/+2
SE discovery errors are currently overwriting the dev_up() return error. This is wrong for many reasons: - We don't want to report an error if we actually brought the device up but it failed to discover SEs. By doing so we pretend we don't have an NFC functional device even we do. The only thing we could not do was checking for SEs availability. This is the false negative case. - In some cases the actual device power up failed but the SE discovery succeeded. Userspace then believes the device is up while it's not. This is the false positive case. Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-01-04NFC: llcp: Use default MIU if none was specified on connectSzymon Janc3-3/+1
If MIUX is not present in CONNECT or CC use default MIU value (128) instead of one announced durring link setup. This was affecting Bluetooth handover with Android 4.3+ NCI stack. Signed-off-by: Szymon Janc <szymon.janc@gmail.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-01-04NFC: llcp: Fix possible memory leak while sending I framesSzymon Janc1-1/+3
If sending was not completed due to low memory condition msg_data was not free before returning from function. Signed-off-by: Szymon Janc <szymon.janc@gmail.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-01-04NFC: Return driver failure upon unknown event receptionSamuel Ortiz1-5/+2
If the device is polling, this will trigger a netlink event to notify userspace about the polling error. Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-01-04NFC: Fix target mode p2p link establishmentArron Wang1-1/+1
With commit e29a9e2ae165620d, we set the active_target pointer from nfc_dep_link_is_up() in order to support the case where the target detection and the DEP link setting are done atomically by the driver. That can only happen in initiator mode, so we need to check for that otherwise we fail to bring a p2p link in target mode. Signed-off-by: Arron Wang <arron.wang@intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-12-19treewide: Fix typos in printkMasanari Iida1-1/+1
Correct spelling typo in various part of kernel Signed-off-by: Masanari Iida <standby24x7@gmail.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2013-12-11nfc: Fix FSF address in file headersJeff Kirsher22-61/+22
Several files refer to an old address for the Free Software Foundation in the file header comment. Resolve by replacing the address with the URL <http://www.gnu.org/licenses/> so that we do not have to keep updating the header comments anytime the address changes. CC: linux-wireless@vger.kernel.org CC: Lauro Ramos Venancio <lauro.venancio@openbossa.org> CC: Aloisio Almeida Jr <aloisio.almeida@openbossa.org> CC: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2013-11-20net: rework recvmsg handler msg_name and msg_namelen logicHannes Frederic Sowa2-4/+0
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must set msg_namelen to the proper size <= sizeof(struct sockaddr_storage) to return msg_name to the user. This prevents numerous uninitialized memory leaks we had in the recvmsg handlers and makes it harder for new code to accidentally leak uninitialized memory. Optimize for the case recvfrom is called with NULL as address. We don't need to copy the address at all, so set it to NULL before invoking the recvmsg handler. We can do so, because all the recvmsg handlers must cope with the case a plain read() is called on them. read() also sets msg_name to NULL. Also document these changes in include/linux/net.h as suggested by David Miller. Changes since RFC: Set msg->msg_name = NULL if user specified a NULL in msg_name but had a non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't affect sendto as it would bail out earlier while trying to copy-in the address. It also more naturally reflects the logic by the callers of verify_iovec. With this change in place I could remove " if (!uaddr || msg_sys->msg_namelen == 0) msg->msg_name = NULL ". This change does not alter the user visible error logic as we ignore msg_namelen as long as msg_name is NULL. Also remove two unnecessary curly brackets in ___sys_recvmsg and change comments to netdev style. Cc: David Miller <davem@davemloft.net> Suggested-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-11-19genetlink: make multicast groups const, prevent abuseJohannes Berg1-32/+19
Register generic netlink multicast groups as an array with the family and give them contiguous group IDs. Then instead of passing the global group ID to the various functions that send messages, pass the ID relative to the family - for most families that's just 0 because the only have one group. This avoids the list_head and ID in each group, adding a new field for the mcast group ID offset to the family. At the same time, this allows us to prevent abusing groups again like the quota and dropmon code did, since we can now check that a family only uses a group it owns. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-11-19genetlink: pass family to functions using groupsJohannes Berg1-13/+26
This doesn't really change anything, but prepares for the next patch that will change the APIs to pass the group ID within the family, rather than the global group ID. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-11-19genetlink: only pass array to genl_register_family_with_ops()Johannes Berg1-2/+1
As suggested by David Miller, make genl_register_family_with_ops() a macro and pass only the array, evaluating ARRAY_SIZE() in the macro, this is a little safer. The openvswitch has some indirection, assing ops/n_ops directly in that code. This might ultimately just assign the pointers in the family initializations, saving the struct genl_family_and_ops and code (once mcast groups are handled differently.) Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-11-14genetlink: make all genl_ops users constJohannes Berg1-1/+1
Now that genl_ops are no longer modified in place when registering, they can be made const. This patch was done mostly with spatch: @@ identifier ops; @@ +const struct genl_ops ops[] = { ... }; (except the struct thing in net/openvswitch/datapath.c) Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-10-07NFC: Fix SE API related sparse warningSamuel Ortiz1-1/+1
se_io_cb can be declared static. This fixes the following sparse warning: net/nfc/netlink.c:1287:6: warning: symbol 'se_io_cb' was not declared. Should it be static? Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-09-25NFC: NCI: Modify NCI SPI to implement CS/INT handshake per the specEric Lapuyade1-22/+31
The NFC Forum NCI specification defines both a hardware and software protocol when using a SPI physical transport to connect an NFC NCI Chipset. The hardware requirement is that, after having raised the chip select line, the SPI driver must wait for an INT line from the NFC chipset to raise before it sends the data. The chip select must be raised first though, because this is the signal that the NFC chipset will detect to wake up and then raise its INT line. If the INT line doesn't raise in a timely fashion, the SPI driver should abort operation. When data is transferred from Device host (DH) to NFC Controller (NFCC), the signaling sequence is the following: Data Transfer from DH to NFCC • 1-Master asserts SPI_CSN • 2-Slave asserts SPI_INT • 3-Master sends NCI-over-SPI protocol header and payload data • 4-Slave deasserts SPI_INT • 5-Master deasserts SPI_CSN When data must be transferred from NFCC to DH, things are a little bit different. Data Transfer from NFCC to DH • 1-Slave asserts SPI_INT -> NFC chipset irq handler called -> process reading from SPI • 2-Master asserts SPI_CSN • 3-Master send 2-octet NCI-over-SPI protocol header • 4-Slave sends 2-octet NCI-over-SPI protocol payload length • 5-Slave sends NCI-over-SPI protocol payload • 6-Master deasserts SPI_CSN In this case, SPI driver should function normally as it does today. Note that the INT line can and will be lowered anytime between beginning of step 3 and end of step 5. A low INT is therefore valid after chip select has been raised. This would be easily implemented in a single driver. Unfortunately, we don't write the SPI driver and I had to imagine some workaround trick to get the SPI and NFC drivers to work in a synchronized fashion. The trick is the following: - send an empty spi message: this will raise the chip select line, and send nothing. We expect the /CS line will stay arisen because we asked for it in the spi_transfer cs_change field - wait for a completion, that will be completed by the NFC driver IRQ handler when it knows we are in the process of sending data (NFC spec says that we use SPI in a half duplex mode, so we are either sending or receiving). - when completed, proceed with the normal data send. This has been tested and verified to work very consistently on a Nexus 10 (spi-s3c64xx driver). It may not work the same with other spi drivers. The previously defined nci_spi_ops{} whose intended purpose were to address this problem are not used anymore and therefore totally removed. The nci_spi_send() takes a new optional write_handshake_completion completion pointer. If non NULL, the nci spi layer will run the above trick when sending data to the NFC Chip. If NULL, the data is sent normally all at once and it is then the NFC driver responsibility to know what it's doing. Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-09-25NFC: NCI: nci_spi_recv_frame() now returns (not forward) the read frameEric Lapuyade1-16/+10
Previously, nci_spi_recv_frame() would directly transmit incoming frames to the NCI Core. However, it turns out that some NFC NCI Chips will add additional proprietary headers that must be handled/removed before NCI Core gets a chance to handle the frame. With this modification, the chip phy or driver are now responsible to transmit incoming frames to NCI Core after proper treatment, and NCI SPI becomes a driver helper instead of sitting between the NFC driver and NCI Core. As a general rule in NFC, *_recv_frame() APIs are used to deliver an incoming frame to an upper layer. To better suit the actual purpose of nci_spi_recv_frame(), and go along with its nci_spi_send() counterpart, the function is renamed to nci_spi_read() The skb is returned as the function result Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-09-25NFC: NCI: zero struct spi_transfer variables before usageEric Lapuyade1-0/+9
Using ARM compiler, and without zero-ing spi_transfer, spi-s3c64xx driver would issue abnormal errors due to bpw field value being set to unexpected value. This structure MUST be set to all zeros except for those field specifically used. Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-09-25NFC: netlink: SE API implementationSamuel Ortiz1-0/+91
Implementation of the NFC_CMD_SE_IO command for sending ISO7816 APDUs to NFC embedded secure elements. The reply is forwarded to user space through NFC_CMD_SE_IO as well. Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-09-25NFC: digital: Fix sens_res endiannes handlingThierry Escande1-9/+6
This was triggered by the following sparse warning: net/nfc/digital_technology.c:272:20: sparse: cast to restricted __be16 The SENS_RES response must be treated as __le16 with the first byte received as LSB and the second one as MSB. This is the way neard handles it in the sens_res field of the nfc_target structure which is treated as u16 in cpu endianness. So le16_to_cpu() is used on the received SENS_RES instead of memcpy'ing it. SENS_RES test macros have also been fixed accordingly. Signed-off-by: Thierry Escande <thierry.escande@linux.intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-09-25NFC: rawsock: Fix a memory leakThierry Escande1-2/+5
In the rawsock data exchange callback, the sk_buff is not freed on error. Signed-off-by: Thierry Escande <thierry.escande@linux.intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-09-25NFC: digital: digital_tg_send_sensf_res() can be staticFengguang Wu1-1/+1
Fixes sparse hint: net/nfc/digital_technology.c:640:5: sparse: symbol 'digital_tg_send_sensf_res' was not declared. Should it be static? Cc: Thierry Escande <thierry.escande@linux.intel.com> Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-09-25NFC: digital: Add newline to pr_* callsSamuel Ortiz3-26/+22
We do not add the newline to the pr_fmt macro, in order to give more flexibility to the caller and to keep the logging style consistent with the rest of the NFC and kernel code. Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-09-25NFC: digital: Remove PR_ERR and PR_DBG macrosSamuel Ortiz4-27/+31
They can be replaced by the standard pr_err and pr_debug one after defining the right pr_fmt macro. Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-09-25NFC: NCI: Store the spi device pointer from the spi instanceEric Lapuyade1-0/+1
Storing the spi device was forgotten in the original implementation, which would pretty obviously cause some kind of serious crash when actually trying to send something through that device. Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-09-25NFC Digital: Add target NFC-DEP supportThierry Escande4-7/+755
This adds support for NFC-DEP target mode for NFC-A and NFC-F technologies. If the driver provides it, the stack uses an automatic mode for technology detection and automatic anti-collision. Otherwise the stack tries to use non-automatic synchronization and listens for SENS_REQ and SENSF_REQ commands. The detection, activation, and data exchange procedures work exactly the same way as in initiator mode, as described in the previous commits, except that the digital stack waits for commands and sends responses back to the peer device. Signed-off-by: Thierry Escande <thierry.escande@linux.intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-09-25NFC Digital: Add initiator NFC-DEP supportThierry Escande5-6/+435
This adds support for NFC-DEP protocol in initiator mode for NFC-A and NFC-F technologies. When a target is detected, the process flow is as follow: For NFC-A technology: 1 - The digital stack receives a SEL_RES as the reply of the SEL_REQ command. 2 - If b7 of SEL_RES is set, the peer device is configure for NFC-DEP protocol. NFC core is notified through nfc_targets_found(). Execution continues at step 4. 3 - Otherwise, it's a tag and the NFC core is notified. Detection ends. 4 - The digital stacks sends an ATR_REQ command containing a randomly generated NFCID3 and the general bytes obtained from the LLCP layer of NFC core. For NFC-F technology: 1 - The digital stack receives a SENSF_RES as the reply of the SENSF_REQ command. 2 - If B1 and B2 of NFCID2 are 0x01 and 0xFE respectively, the peer device is configured for NFC-DEP protocol. NFC core is notified through nfc_targets_found(). Execution continues at step 4. 3 - Otherwise it's a type 3 tag. NFC core is notified. Detection ends. 4 - The digital stacks sends an ATR_REQ command containing the NFC-F NFCID2 as NFCID3 and the general bytes obtained from the LLCP layer of NFC core. For both technologies: 5 - The digital stacks receives the ATR_RES response containing the NFCID3 and the general bytes of the peer device. 6 - The digital stack notifies NFC core that the DEP link is up through nfc_dep_link_up(). 7 - The NFC core performs data exchange through tm_transceive(). 8 - The digital stack sends a DEP_REQ command containing an I PDU with the data from NFC core. 9 - The digital stack receives a DEP_RES command 10 - If the DEP_RES response contains a supervisor PDU with timeout extension request (RTOX) the digital stack sends a DEP_REQ command containing a supervisor PDU acknowledging the RTOX request. The execution continues at step 9. 11 - If the DEP_RES response contains an I PDU, the response data is passed back to NFC core through the response callback. The execution continues at step 8. Signed-off-by: Thierry Escande <thierry.escande@linux.intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-09-25NFC Digital: Add NFC-F technology supportThierry Escande4-0/+153
This adds polling support for NFC-F technology at 212 kbits/s and 424 kbits/s. A user space application like neard can send type 3 tag commands through the NFC core. Process flow for NFC-F detection is as follow: 1 - The digital stack sends the SENSF_REQ command to the NFC device. 2 - A peer device replies with a SENSF_RES response. 3 - The digital stack notifies the NFC core of the presence of a target in the operation field and passes the target NFCID2. This also adds support for CRC calculation of type CRC-F. The CRC calculation is handled by the digital stack if the NFC device doesn't support it. Signed-off-by: Thierry Escande <thierry.escande@linux.intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-09-25NFC Digital: Add NFC-A technology supportThierry Escande4-4/+488
This adds support for NFC-A technology at 106 kbits/s. The stack can detect tags of type 1 and 2. There is no support for collision detection. Tags can be read and written by using a user space application or a daemon like neard. The flow of polling operations for NFC-A detection is as follow: 1 - The digital stack sends the SENS_REQ command to the NFC device. 2 - The NFC device receives a SENS_RES response from a peer device and passes it to the digital stack. 3 - If the SENS_RES response identifies a type 1 tag, detection ends. NFC core is notified through nfc_targets_found(). 4 - Otherwise, the digital stack sets the cascade level of NFCID1 to CL1 and sends the SDD_REQ command. 5 - The digital stack selects SEL_CMD and SEL_PAR according to the cascade level and sends the SDD_REQ command. 4 - The digital stack receives a SDD_RES response for the cascade level passed in the SDD_REQ command. 5 - The digital stack analyses (part of) NFCID1 and verify BCC. 6 - The digital stack sends the SEL_REQ command with the NFCID1 received in the SDD_RES. 6 - The peer device replies with a SEL_RES response 7 - Detection ends if NFCID1 is complete. NFC core notified of new target by nfc_targets_found(). 8 - If NFCID1 is not complete, the cascade level is incremented (up to and including CL3) and the execution continues at step 5 to get the remaining bytes of NFCID1. Once target detection is done, type 1 and 2 tag commands must be handled by a user space application (i.e neard) through the NFC core. Responses for type 1 tag are returned directly to user space via NFC core. Responses of type 2 commands are handled differently. The digital stack doesn't analyse the type of commands sent through im_transceive() and must differentiate valid responses from error ones. The response process flow is as follow: 1 - If the response length is 16 bytes, it is a valid response of a READ command. the packet is returned to the NFC core through the callback passed to im_transceive(). Processing stops. 2 - If the response is 1 byte long and is a ACK byte (0x0A), it is a valid response of a WRITE command for example. First packet byte is set to 0 for no-error and passed back to the NFC core. Processing stops. 3 - Any other response is treated as an error and -EIO error code is returned to the NFC core through the response callback. Moreover, since the driver can't differentiate success response from a NACK response, the digital stack has to handle CRC calculation. Thus, this patch also adds support for CRC calculation. If the driver doesn't handle it, the digital stack will calculate CRC and will add it to sent frames. CRC will also be checked and removed from received frames. Pointers to the correct CRC calculation functions are stored in the digital stack device structure when a target is detected. This avoids the need to check the current target type for every call to im_transceive() and for every response received from a peer device. Signed-off-by: Thierry Escande <thierry.escande@linux.intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-09-25NFC Digital: Implement driver commands mechanismThierry Escande4-8/+427
This implements the mechanism used to send commands to the driver in initiator mode through in_send_cmd(). Commands are serialized and sent to the driver by using a work item on the system workqueue. Responses are handled asynchronously by another work item. Once the digital stack receives the response through the command_complete callback, the next command is sent to the driver. This also implements the polling mechanism. It's handled by a work item cycling on all supported protocols. The start poll command for a given protocol is sent to the driver using the mechanism described above. The process continues until a peer is discovered or stop_poll is called. This patch implements the poll function for NFC-A that sends a SENS_REQ command and waits for the SENS_RES response. Signed-off-by: Thierry Escande <thierry.escande@linux.intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-09-25NFC: Digital Protocol stack implementationThierry Escande4-0/+192
This is the initial commit of the NFC Digital Protocol stack implementation. It offers an interface for devices that don't have an embedded NFC Digital protocol stack. The driver instantiates the digital stack by calling nfc_digital_allocate_device(). Within the nfc_digital_ops structure, the driver specifies a set of function pointers for driver operations. These functions must be implemented by the driver and are: in_configure_hw: Hardware configuration for RF technology and communication framing in initiator mode. This is a synchronous function. in_send_cmd: Initiator mode data exchange using RF technology and framing previously set with in_configure_hw. The peer response is returned through callback cb. If an io error occurs or the peer didn't reply within the specified timeout (ms), the error code is passed back through the resp pointer. This is an asynchronous function. tg_configure_hw: Hardware configuration for RF technology and communication framing in target mode. This is a synchronous function. tg_send_cmd: Target mode data exchange using RF technology and framing previously set with tg_configure_hw. The peer next command is returned through callback cb. If an io error occurs or the peer didn't reply within the specified timeout (ms), the error code is passed back through the resp pointer. This is an asynchronous function. tg_listen: Put the device in listen mode waiting for data from the peer device. This is an asynchronous function. tg_listen_mdaa: If supported, put the device in automatic listen mode with mode detection and automatic anti-collision. In this mode, the device automatically detects the RF technology and executes the anti-collision detection using the command responses specified in mdaa_params. The mdaa_params structure contains SENS_RES, NFCID1, and SEL_RES for 106A RF tech. NFCID2 and system code (sc) for 212F and 424F. The driver returns the NFC-DEP ATR_REQ command through cb. The digital stack deducts the RF tech by analyzing the SoD of the frame containing the ATR_REQ command. This is an asynchronous function. switch_rf: Turns device radio on or off. The stack does not call explicitly switch_rf to turn the radio on. A call to in|tg_configure_hw must turn the device radio on. abort_cmd: Discard the last sent command. Then the driver registers itself against the digital stack by using nfc_digital_register_device() which in turn registers the digital stack against the NFC core layer. The digital stack implements common NFC operations like dev_up(), dev_down(), start_poll(), stop_poll(), etc. This patch is only a skeleton and NFC operations are just stubs. Signed-off-by: Thierry Escande <thierry.escande@linux.intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-09-25NFC: Set active target upon DEP up event receptionSamuel Ortiz1-0/+13
As we can potentially get DEP up events without having sent a netlink command, we need to set the active target properly from dep_link_is_up. Spontaneous DEP up events can come from devices that detected an active p2p target. In that case there is no need to call the netlink DEP up command as the link is already up and running. Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-09-25NFC: NCI: Simplify NCI SPI to become a simple framing/checking layerEric Lapuyade1-125/+55
NCI SPI layer should not manage the nci dev, this is the job of the nci chipset driver. This layer should be limited to frame/deframe nci packets, and optionnaly check integrity (crc) and manage the ack/nak protocol. The NCI SPI must not be mixed up with an NCI dev. spi_[dev|device] are therefore renamed to a simple spi for more clarity. The header and crc sizes are moved to nci.h so that drivers can use them to reserve space in outgoing skbs. nci_spi_send() is exported to be accessible by drivers. Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-09-25NFC: NCI: Rename spi ndev -> nsdev and nci_dev -> ndev for consistencyEric Lapuyade1-64/+64
An hci dev is an hdev. An nci dev is an ndev. Calling an nci spi dev an ndev is misleading since it's not the same thing. The nci dev contained in the nci spi dev is also named inconsistently. Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-09-25NFC: NCI: Fix wrong allocation size in nci_spi_allocate_device()Eric Lapuyade1-1/+1
Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-09-25NFC: Export nfc_find_se()Arron Wang1-4/+5
This will be needed by all NFC driver implementing the SE ops. Signed-off-by: Arron Wang <arron.wang@intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-08-14NFC: Update secure element stateArron Wang1-0/+4
The secure element state was not updated from the enable/disable ops, leaving the SE state to disabled for ever. Signed-off-by: Arron Wang <arron.wang@intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

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