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* sfc: Use TX push whenever adding descriptors to an empty queueBen Hutchings2010-12-073-2/+68
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Whenever we add DMA descriptors to a TX ring and update the ring pointer, the TX DMA engine must first read the new DMA descriptors and then start reading packet data. However, all released Solarflare 10G controllers have a 'TX push' feature that allows us to reduce latency by writing the first new DMA descriptor along with the pointer update. This is only useful when the queue is empty. The hardware should ignore the pushed descriptor if the queue is not empty, but this check is buggy, so we must do it in software. In order to tell whether a TX queue is empty, we need to compare the previous transmission count (write_count) and completion count (read_count). However, if we do that every time we update the ring pointer then read_count may ping-pong between the caches of two CPUs running the transmission and completion paths for the queue. Therefore, we split the check for an empty queue between the completion path and the transmission path: - Add an empty_read_count field representing a point at which the completion path saw the TX queue as empty. - Add an old_write_count field for use on the completion path. - On the completion path, whenever read_count reaches or passes old_write_count the TX queue may be empty. We then read write_count, set empty_read_count if read_count == write_count, and update old_write_count. - On the transmission path, we read empty_read_count. If it's set, we compare it with the value of write_count before the current set of descriptors was added. If they match, the queue really is empty and we can use TX push. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Remove locking from implementation of efx_writeo_paged()Ben Hutchings2010-12-061-1/+14
| | | | | | | | It is not necessary to serialise writes to the paged 128-bit registers. However, if we don't then we must always write the last dword separately, not as part of a qword write. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Add compile-time checks for correctness of paged register writesBen Hutchings2010-12-061-8/+23
| | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Remove redundant memory barriers between MMIOsBen Hutchings2010-12-061-5/+0
| | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Expand/correct comments on collector behaviour and function usageBen Hutchings2010-12-061-49/+49
| | | | | | | Document exactly which registers and functions have special behaviour, and why races on writes to descriptor pointers are safe. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Use ACCESS_ONCE when copying efx_tx_queue::read_countBen Hutchings2010-12-061-3/+2
| | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* sfc: Reorder struct efx_nic to separate fields by volatilityBen Hutchings2010-12-061-18/+23
| | | | | | | | Place the regularly updated fields (locks, MAC stats, etc.) on a separate cache-line from fields which are mostly constant. This should reduce cache misses for access to the latter on the data path. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
* ixgbe: add support for new format of PBA numbersDon Skidmore2010-12-034-16/+105
| | | | | | | | | | The new PBA format is stored as a string. This patch allows the driver to support both the old and new format. Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com> Tested-by: Stephen Ko <stephen.s.ko@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ixgbe: add support for 82599 FCoE SKUDon Skidmore2010-12-033-0/+8
| | | | | | | | | Add both NIC and backplane support for FCoE enabled devices IDs. Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com> Tested-by: Stephen Ko <stephen.s.ko@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ixgbe: add WOL support for SFP+ subdeviceDon Skidmore2010-12-033-5/+22
| | | | | | | | | | This patch will add wake on LAN support to the dev/sub_dev 10FB 11A9. This will also include ixgbe ethtool support for this device. Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com> Tested-by: Stephen Ko <stephen.s.ko@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ixgbe: fix link behavior for SFP+ when driver is brought downDon Skidmore2010-12-032-11/+27
| | | | | | | | | | | | We have had several requests to have ifconfig down command disable the SFP+ laser and thus make link go down. Likewise on ifconfig up the laser would be enabled and link would come up. This patch enables that behavior. Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com> Tested-by: Stephen Ko <stephen.s.ko@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* qlcnic: Updated driver version to 5.0.13Anirban Chakraborty2010-12-031-2/+2
| | | | | Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* qlcnic: LICENSE file for qlcnicSritej Velaga2010-12-038-140/+348
| | | | | | Signed-off-by: Sritej Velaga <sritej.velaga@qlogic.com> Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* qlcnic: validate eswitch config values for PFAmit Kumar Salecha2010-12-031-3/+6
| | | | | | | | | Currently driver set default eswitch configuration values for PF function, instead of validating values sent by application. Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com> Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* qlcnic: Disable loopback supportSucheta Chakraborty2010-12-035-311/+1
| | | | | | | | Loopback mode can not be supported in CNA mode. Removing it until FW is fixed. Signed-off-by: Sucheta Chakraborty <sucheta.chakraborty@qlogic.com> Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Store MAC address from NVRAM in net_device::perm_addrBen Hutchings2010-12-034-13/+7
| | | | | | | | For some reason we failed to make this change when perm_addr was introduced. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Use current MAC address, not NVRAM MAC address, for WoL filterBen Hutchings2010-12-031-1/+1
| | | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: When waking a stopped tx_queue, only lock that tx_queueSteve Hodgson2010-12-031-2/+6
| | | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Update kernel-doc to match earlier move of Toeplitz hash keyBen Hutchings2010-12-032-1/+1
| | | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Move xmac_poll_required into struct falcon_nic_dataBen Hutchings2010-12-035-8/+15
| | | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Move Falcon global event handling to falcon.cBen Hutchings2010-12-033-43/+43
| | | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Move mdio_lock to struct falcon_nic_dataBen Hutchings2010-12-034-7/+9
| | | | | | | | We only have direct access to MDIO on Falcon, so move this out of struct efx_nic. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Move SPI state to struct falcon_nic_dataBen Hutchings2010-12-036-75/+69
| | | | | | | | We only have direct access to SPI on Falcon, so move all this state out of struct efx_nic. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Remove unnecessary inclusion of various private header filesBen Hutchings2010-12-038-10/+0
| | | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Expose Falcon BootROM config through MTD, not ethtoolBen Hutchings2010-12-032-82/+54
| | | | | | | | The ethtool EEPROM interface is really meant for exposing chip configuration, not BootROM configuration. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Remove broken automatic fallback for invalid Falcon chip/board configBen Hutchings2010-12-031-33/+24
| | | | | | | | | | If the Falcon board config is invalid, we cannot proceed - we do not have a valid board type to pass to falcon_probe_board(), and if we kluge that to work with an unknown board then other initialisation code will crash. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Fix event based MCDI completion and MC REBOOT/CMDDONE ordering issueSteve Hodgson2010-12-031-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The mcfw *never* sends CMDDONE when rebooting. Changing this so that it always sends CMDDONE *before* REBOOT is easy on Siena, but it's not obvious that we could guarantee to be able to implement this on future hardware. Given this, I'm less convinced that the protocol should be changed. To reiterate the failure mode: The driver sees this: issue command receive REBOOT event Was that reboot event sent before the command was issued, or in response to the command? If the former then there will be a subsequent CMDDONE event, if the latter, then there will be no CMDDONE event. Options to resolve this are: 1. REBOOT always completes an outstanding mcdi request, and we set the credits count to ignore a subsequent CMDDONE event with mismatching seqno. 2. REBOOT never completes an outstanding mcdi request. If there is no CMDDONE event then we rely on the mcdi timeout code to complete the outstanding request, incurring a 10s delay. I'd argue that (2) is tidier, but that incurring a 10s delay is a little needless. Let's go with (1). Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Clear RXIN_SEL when soft-resetting QT2025CBen Hutchings2010-12-031-0/+6
| | | | | | | | | When we enable PMA/PMD loopback this automatically sets RXIN_SEL (inverse polarity for RXIN). We need to clear that bit during the soft-reset sequence, as it is not done automatically. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Read-to-clear LM87 alarm/interrupt status at start of dayBen Hutchings2010-12-031-0/+4
| | | | | | | | We do not want to shut down the board based on a fault that has already been cleared. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Distinguish critical and non-critical over-temperature conditionsBen Hutchings2010-12-031-29/+80
| | | | | | | | | | Set both the 'maximum' and critical temperature limits for LM87 hardware monitors on Falcon boards. Do not shut down a port until the critical temperature is reached, but warn as soon as the 'maximum' temperature is reached. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Fix condition for no-op in set_phy_flash_cfg()Ben Hutchings2010-12-031-1/+1
| | | | | Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfc: Reduce log level for MCDI error response in efx_mcdi_rpc()Ben Hutchings2010-12-031-1/+1
| | | | | | | | | | Some errors are expected, e.g. when sending new commands to an MC running old firmware. Only the caller of efx_mcdi_rpc() can decide what is a real error. Therefore log the error responses with netif_dbg(). Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tipc: Delete tipc_ownidentity()Allan Stephens2010-12-023-10/+2
| | | | | | | | | Moves the content of the native API routine tipc_ownidentity() into the sole routine that calls it, since it can no longer be called in isolation. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tipc: Eliminate obsolete native API forwarding routinesAllan Stephens2010-12-022-87/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | Moves the content of each native API message forwarding routine into the sole routine that calls it, since the forwarding routines no longer be called in isolation. Also removes code in each routine that altered the outgoing message's importance level since this is now no longer possible. The previous function mapping (parent function, and child API) was as follows: tipc_send2name \--tipc_forward2name tipc_send2port \--tipc_forward2port tipc_send_buf2port \--tipc_forward_buf2port After this commit, the children don't exist and their functionality is completely in the respective parent. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tipc: Eliminate an unused symbolic constant in link codeAllan Stephens2010-12-021-6/+0
| | | | | | | | Removes a symbol that is not referenced anywhere by TIPC's link code. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tipc: Eliminate useless initialization when creating subscriberAllan Stephens2010-12-021-1/+1
| | | | | | | | | Removes initialization of a local variable that is always assigned a different value before it is referenced. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tipc: Remove unused domain argument from multicast send routineAllan Stephens2010-12-023-3/+2
| | | | | | | | | Eliminates an unused argument from tipc_multicast(), now that this routine can no longer be called by kernel-based applications. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tipc: Remove support for TIPC mode change callbackAllan Stephens2010-12-024-53/+5
| | | | | | | | | | | Eliminates support for the callback routine invoked when TIPC changes its mode of operation from inactive to standalone or from standalone to networked. This callback was part of TIPC's obsolete native API and is not used by TIPC internally. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tipc: Delete useless function prototypesAllan Stephens2010-12-024-4/+0
| | | | | | | | | | | Removes several function declarations that aren't used anywhere, either because they reference routines that no longer exist or because all users of the function reference it after it has already been defined. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tipc: Eliminate useless return value when disabling a bearerAllan Stephens2010-12-021-4/+5
| | | | | | | | | Modifies bearer_disable() to return void since it always indicates success anyway. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tipc: Delete unused configuration service structure definitionAllan Stephens2010-12-021-7/+0
| | | | | | | | | Removes a structure definition that is no longer used by TIPC's configuration service. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tipc: Remove obsolete inclusions of header filesAllan Stephens2010-12-0222-77/+0
| | | | | | | | | | Gets rid of #include statements that are no longer required as a result of the merging of obsolete native API header file content into other TIPC include files. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tipc: Remove obsolete native API files and exportsAllan Stephens2010-12-0215-690/+382
| | | | | | | | | | | | | | | | | As part of the removal of TIPC's native API support it is no longer necessary for TIPC to export symbols for routines that can be called by kernel-based applications, nor for it to have header files that kernel-based applications can include to access the declarations for those routines. This commit eliminates the exporting of symbols by TIPC and migrates the contents of each obsolete native API include file into its corresponding non-native API equivalent. The code which was migrated in this commit was migrated intact, in that there are no technical changes combined with the relocation. Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: kill unused macros from head fileShan Wei2010-12-026-16/+0
| | | | | | | | These macros have been defined for several years since v2.6.12-rc2（tracing by git）, but never be used. So remove them. Signed-off-by: Shan Wei <shanwei@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipv6: use ND_REACHABLE_TIME and ND_RETRANS_TIMER instead of magic numberShan Wei2010-12-021-12/+12
| | | | | | | | | | | | | ND_REACHABLE_TIME and ND_RETRANS_TIMER have defined since v2.6.12-rc2, but never been used. So use them instead of magic number. This patch also changes original code style to read comfortably . Thank YOSHIFUJI Hideaki for pointing it out. Signed-off-by: Shan Wei <shanwei@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* tcp: use TCP_BASE_MSS to set basic mss valueShan Wei2010-12-021-1/+1
| | | | | | | | | | | | | | | TCP_BASE_MSS is defined, but not used. commit 5d424d5a introduce this macro, so use it to initial sysctl_tcp_base_mss. commit 5d424d5a674f782d0659a3b66d951f412901faee Author: John Heffner <jheffner@psc.edu> Date: Mon Mar 20 17:53:41 2006 -0800 [TCP]: MTU probing Signed-off-by: Shan Wei <shanwei@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: snmp: fix the wrong ICMP_MIB_MAX valueShan Wei2010-12-021-2/+1
| | | | | | | | | | __ICMP_MIB_MAX is equal to the total number of icmp mib, So no need to add 1. This wastes 4/8 bytes memory. Change it to be same as ICMP6_MIB_MAX, TCP_MIB_MAX, UDP_MIB_MAX. Signed-off-by: Shan Wei <shanwei@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* can: EG20T PCH: Delete unnecessary spin_lockTomoya2010-12-021-34/+0
| | | | | | | | | | Delete unnecessary spin_lock for accessing Message Object. Since all message objects are divided into tx/rx area completely, spin_lock processing is unnecessary. Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> Acked-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* can: EG20T PCH: Enumerate LEC macrosTomoya2010-12-021-36/+41
| | | | | | | For easy to readable, LEC #define macros are replaced to enums. Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* can: EG20T PCH: Change Message Object IndexTomoya2010-12-021-147/+116
| | | | | | | | | | | For easy to readable, add Message Object index like below. PCH_RX_OBJ_START PCH_RX_OBJ_END PCH_TX_OBJ_START PCH_TX_OBJ_END Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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