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path: root/drivers/net/s2io.h
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* S2io: Added napi support when MSIX is enabled.Sreenivasa Honnur2008-05-221-5/+12
| | | | | | | | | - Added napi support when MSIX is enabled. - Moved test_msi function from s2io_open to probe function. Signed-off-by: Sreenivasa Honnur <sreenivasa.honnur@neterion.com> Signed-off-by: Ramkrishna Vepa <ram.vepa@neterion.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* S2io: Move all the transmit completions to a single msi-x (alarm) vectorSreenivasa Honnur2008-05-221-2/+3
| | | | | | | | | - Move all the transmit completions to a single msi-x (alarm) vector. - Enable the continuous timer interrupt for only one transmit fifo. Signed-off-by: Santosh Rastapur <santosh.rastapur@neterion.com> Signed-off-by: Ramkrishna Vepa <ram.vepa@neterion.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* S2io: Enable multi ring supportSreenivasa Honnur2008-04-291-29/+53
| | | | | | | | | | | | | | | | - Seperate ring specific data - Initialize all configured rings with equal priority. - Updated boundary check for number of Rings. - Updated per ring statistics of rx_bytes and rx_packets. - Moved lro struct from struct s2io_nic to struct ring_info. - Access respective rx ring directly in fill_rx_buffers. - Moved rx_bufs_left struct s2io_nic to struct ring_info. - Added per ring variables - rxd_mode, rxd_count, dev, pdev. Signed-off-by: Surjit Reang <surjit.reang@neterion.com> Signed-off-by: Sreenivasa Honnur <sreenivasa.honnur@neterion.com> Signed-off-by: Ramkrishna Vepa <ram.vepa@neterion.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* S2io: Removed rx_lock and put_lockSreenivasa Honnur2008-04-251-6/+0
| | | | | | | | | | - Removed rx_lock and put_lock as the buffer replenishment and receive completion is handled serially. Signed-off-by: Surjit Reang <surjit.reang@neterion.com> Signed-off-by: Sreenivasa Honnur <sreenivasa.honnur@neterion.com> Signed-off-by: Ramkrishna Vepa <ram.vepa@neterion.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* S2io: Removed receive buffer replenishment taskletSreenivasa Honnur2008-04-251-3/+0
| | | | | | | | | | | - Removed receive buffer replenishment tasklet s2io_tasklet and instead allocating the receive buffers in either the interrupt handler (no napi) or the napi handler (napi enabled). Signed-off-by: Surjit Reang <surjit.reang@neterion.com> Signed-off-by: Sreenivasa Honnur <sreenivasa.honnur@neterion.com> Signed-off-by: Ramkrishna Vepa <ram.vepa@neterion.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* S2io: Support for vlan_rx_kill_vid entry pointSreenivasa Honnur2008-03-171-2/+4
| | | | | | | | | | | - Resubmit #3 - Added s2io_vlan_rx_kill_vid entry point function for unregistering vlan. - Fix to aggregate vlan packets. IP offset is incremented by 4 bytes if the packet contains vlan header. Signed-off-by: Surjit Reang <surjit.reang@neterion.com> Signed-off-by: Ramkrishna Vepa <ram.vepa@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* S2io: Multiqueue network device support - FIFO selection based on L4 portsSreenivasa Honnur2008-03-171-1/+33
| | | | | | | | | | | | | - Resubmit #2 - Transmit fifo selection based on TCP/UDP ports. - Added tx_steering_type loadable parameter for transmit fifo selection. 0x0 NO_STEERING: Default FIFO is selected. 0x1 TX_PRIORITY_STEERING: FIFO is selected based on skb->priority. 0x2 TX_DEFAULT_STEERING: FIFO is selected based on L4 Ports. Signed-off-by: Surjit Reang <surjit.reang@neterion.com> Signed-off-by: Ramkrishna Vepa <ram.vepa@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* S2io: Multiqueue network device support implementationSreenivasa Honnur2008-03-171-0/+10
| | | | | | | | | | | | | | | | | | | | | | | - Resubmit #3 Multiqueue netwrok device support implementation. - Added a loadable parameter "multiq" to enable/disable multiqueue support, by default it is disabled. - skb->queue_mapping is not used for queue/fifo selection. FIFO selection is based on skb->priority. - Added per FIFO flags FIFO_QUEUE_START and FIFO_QUEUE_STOP. Check this flag for starting and stopping netif queue and update the flags accordingly. - In tx_intr_handler added a check to ensure that we have free TXDs before wak- ing up the queue. - Added helper functions for queue manipulation(start/stop/wakeup) to invoke appropriate netif_ functions. - Calling netif_start/stop for link up/down case respectively. - As per Andi kleen's review comments, using skb->priority field for FIFO selection. Signed-off-by: Surjit Reang <surjit.reang@neterion.com> Signed-off-by: Ramkrishna Vepa <ram.vepa@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* S2io: Fix for LRO BugsSurjit Reang2008-02-031-1/+1
| | | | | | | | | | | | | | | | | Resubmitting patch from Al Viro <viro@zeniv.linux.org.uk>, with subject - [PATCH] s2io LRO bugs. a) initiate_new_session() sets ->tcp_ack to ntohl(...); everything else stores and expects to find there the net-endian value. b) check for monotonic timestamps in verify_l3_l4_lro_capable() compares the value sitting in TCP option (right there in the skb->data, net-endian 32bit) with the value picked from earlier packet. Doing that without ntohl() is an interesting idea and it might even work occasionally; unfortunately, it's quite broken. Signed-off-by: Surjit Reang <surjit.reang@neterion.com> Signed-off-by: Ramkrishna Vepa <ram.vepa@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* S2io: Fixes to enable multiple transmit fifo supportSurjit Reang2008-01-281-3/+9
| | | | | | | | | | | | | | | | Fixes to enable multiple transmit fifos (upto a maximum of eight). - Moved single tx_lock from struct s2io_nic to struct fifo_info. - Moved single ufo_in_band_v structure from struct s2io_nic to struct fifo_info. - Assign the respective interrupt number for the transmitting fifo in the transmit descriptor (TXD). - Added boundary checks for number of FIFOs enabled and FIFO length. Signed-off-by: Surjit Reang <surjit.reang@neterion.com> Signed-off-by: Sreenivasa Honnur <sreenivasa.honnur@neterion.com> Signed-off-by: Ramkrishna Vepa <ram.vepa@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [S2IO]: Support for add/delete/store/restore ethernet addressesSreenivasa Honnur2008-01-281-2/+12
| | | | | | | - Support to add/delete/store/restore 64 and 128 Ethernet addresses for Xframe I and Xframe II respectively. Signed-off-by: Sreenivasa Honnur <sreenivasa.honnur@neterion.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* s2io, rename BIT macroJiri Slaby2007-10-191-42/+42
| | | | | | | | | | | | | | | s2io, rename BIT macro BIT macro will be global definiton of (1<<x) Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Cc: Ramkrishna Vepa <ram.vepa@neterion.com> Cc: Rastapur Santosh <santosh.rastapur@neterion.com> Cc: Sivakumar Subramani <sivakumar.subramani@neterion.com> Cc: Sreenivasa Honnur <sreenivasa.honnur@neterion.com> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* S2io: Added support set_mac_address driver entry pointSivakumar Subramani2007-10-101-1/+1
| | | | | | | | | | | | - Added set_mac_address driver entry point - Copying permanent mac address to dev->perm_addr - Incorporated following review comments from Jeff - Converted the macro to a function and removed call to memset - regarding function naming convention, for all callbacks and entry points will have 's2io_' prefix and helper functions will have 'do_s2io_' prefix. Signed-off-by: Sreenivasa Honnur <sreenivasa.honnur@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* S2io: Removed unused feature - bimodal interruptsSivakumar Subramani2007-10-101-1/+0
| | | | | | | | | | Removed bimodal interrupt support - unused feature Signed-off-by: Sivakumar Subramani <sivakumar.subramani@neterion.com> Signed-off-by: Ramkrishna Vepa <ram.vepa@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org> [also, trim trailing whitespace]
* S2io: code Optimization of isr functionSivakumar Subramani2007-10-101-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | - Code Optimization of s2io_isr function. - Isr check using per device napi variable instead of driver global. - Reduced from 3 to 1 if condition before check for processing packet receive packets. - Implemented Jeff's comment to use synchronize_irq. Removed the isr_cnt variable as it became redundant. - One time de assert the interrupts by writing all F's to the general_int_mask register instead of de asserting by clearing the source of interrupts with multiple writes which causes loss of interrupts (race conditions). It is entirely possible that before the driver has a chance to mask the asserted alarm bit, another alarm/traffic interrupt bit gets asserted as well. In this case Herc will keep the INTA line asserted and the bridge will not send a new Assert_INTA message upstream. [ Resolved conflicts due to napi_struct changes... -DaveM ] Signed-off-by: Sivakumar Subramani <sivakumar.subramani@neterion.com> Signed-off-by: Santosh Rastapur <santosh.rastapur@neterion.com> Signed-off-by: Ramkrishna Vepa <ram.vepa@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* S2io: Check for device state before handling trafficSivakumar Subramani2007-10-101-4/+8
| | | | | | | | | | | - Added check to return from the traffic handling function, if the card status is DOWN. - Implemented Jeff's comments on incorrect return value in s2io_poll function. Signed-off-by: Sivakumar Subramani <sivakumar.subramani@neterion.com> Signed-off-by: Santosh Rastapur <santosh.rastapur@neterion.com> Signed-off-by: Ramkrishna Vepa <ram.vepa@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* S2io: Cleanup - removed unused variable intr_typeSivakumar Subramani2007-10-101-5/+0
| | | | | | | | | | | | - Removed the unused variable, intr_type, in device private structure. [ Resolve conflicts with napi_struct changes... -DaveM ] Signed-off-by: Sivakumar Subramani <sivakumar.subramani@neterion.com> Signed-off-by: Santosh Rastapur <santosh.rastapur@neterion.com> Signed-off-by: Ramkrishna Vepa <ram.vepa@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [S2IO]: Handle and monitor all of the device errors and alarmsSivakumar Subramani2007-10-101-2/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Added support to poll entire set of device errors and alarams. - A note on how device errors and alarms are handled: - The adapter will automatically recover from uncorrectable ECC errors. Packets containing corrupted data will be dropped (not transmitted) or tagged as invalid before being passed to the host. - The adapter cannot recover from any internal state machine errors. A state machine error requires a device reset. - Any internal error that could potentially result in .store trampling. (undesirable PCI behaviour)is tagged as a "serious error". In such cases the adapter will give up its ability to be a bus master. In this situation the host will still be able to read internal device registers in order to generate an error report. A device reset is necessary to return to normal operation. - In the event of a pcix data parity error, the adapter will automatically disable itself. Adapter_En will automatically transition from '1' to '0' and the adapter will enter its clean-up routine. Once the device has achieved quiescence, an adapter reset should be performed. - Replaced alarm_intr_handler() with s2io_handle_errors(). - Added statistic counters to monitor the alarms. [ Fix warnings wrt. do_s2io_chk_alarm_bit(), Callers pass in an "unsigned long long *" but the function takes a "u64 *" which is different on many 64-bit platforms. -DaveM ] Signed-off-by: Sivakumar Subramani <sivakumar.subramani@neterion.com> Signed-off-by: Santosh Rastapur <santosh.rastapur@neterion.com> Signed-off-by: Ramkrishna Vepa <ram.vepa@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* S2io: Enable all the error and alarm indicationsSivakumar Subramani2007-10-101-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Added support to unmask entire set of device errors and alarams. Alarm interrupts are generated for a myriad of purposes, ranging from illegal operations or requests to internal state machine errors and uncorrectable data corruption errors. In several cases the adapter can recover gracefully from unexpected events; however, in some cases, a device reset may be necessary. This patch handles alarms generated by all the blocks within the device. The adapter generates the following types of alarms: 1. Link state transitions (local/remote fault) or other link-related problems. 2. Problems with any device peripherals, including the EEPROM, FLASH, etc. 3. Correctable ECC errors (single-bit errors) on internal data structures or frame data. 4. Uncorrectable ECC errors (multi-bit errors) on internal data structures or frame data. 5. State machine errors, which indicate that internal control structures have become corrupted. 6. PCI related errors, including parity errors or illegal transactions. 7. Other unexpected events. - Implemented Jeff's review comments to use do_s2io_write_bits function to avoid duplicate codes. Signed-off-by: Sivakumar Subramani <sivakumar.subramani@neterion.com> Signed-off-by: Santosh Rastapur <santosh.rastapur@neterion.com> Signed-off-by: Ramkrishna Vepa <ram.vepa@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* S2IO: Fixes in MSIX related code.Sivakumar Subramani2007-10-101-0/+1
| | | | | | | | | | | - Calling store_xmsi_data to store the MSI-X datas during initialization in s2io-init_nic function - Disabling NAPI when MSI-X is enabled - Freeing sp->entries and sp->s2io_entries in s2io_rem_isr Signed-off-by: Sivakumar Subramani <sivakumar.subramani@neterion.com> Signed-off-by: Ramkrishna Vepa <ram.vepa@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [S2IO]: Making MSIX as default intr_typeSivakumar Subramani2007-10-101-0/+6
| | | | | | | | | | | - Making MSIX as default intr_type - Driver will test MSI-X by issuing test MSI-X vector and if fails it will fallback to INTA Signed-off-by: Sivakumar Subramani <sivakumar.subramani@neterion.com> Signed-off-by: Ramkrishna Vepa <ram.vepa@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Make NAPI polling independent of struct net_device objects.Stephen Hemminger2007-10-101-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Several devices have multiple independant RX queues per net device, and some have a single interrupt doorbell for several queues. In either case, it's easier to support layouts like that if the structure representing the poll is independant from the net device itself. The signature of the ->poll() call back goes from: int foo_poll(struct net_device *dev, int *budget) to int foo_poll(struct napi_struct *napi, int budget) The caller is returned the number of RX packets processed (or the number of "NAPI credits" consumed if you want to get abstract). The callee no longer messes around bumping dev->quota, *budget, etc. because that is all handled in the caller upon return. The napi_struct is to be embedded in the device driver private data structures. Furthermore, it is the driver's responsibility to disable all NAPI instances in it's ->stop() device close handler. Since the napi_struct is privatized into the driver's private data structures, only the driver knows how to get at all of the napi_struct instances it may have per-device. With lots of help and suggestions from Rusty Russell, Roland Dreier, Michael Chan, Jeff Garzik, and Jamal Hadi Salim. Bug fixes from Thomas Graf, Roland Dreier, Peter Zijlstra, Joseph Fannin, Scott Wood, Hans J. Koch, and Michael Chan. [ Ported to current tree and all drivers converted. Integrated Stephen's follow-on kerneldoc additions, and restored poll_list handling to the old style to fix mutual exclusion issues. -DaveM ] Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* S2IO: Checking for the return value of pci map functionVeena Parat2007-07-301-0/+5
| | | | | | | | | | | - Checking for the return value of pci map function - Implemented Francois Romieu's comments on eliminating code duplication using goto - Implemented Francois Romieu's comments on using a temporary variable for accessing statistics structure Signed-off-by: Veena Parat <veena.parat@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* S2IO: Removing MSI support from driverVeena Parat2007-07-301-3/+0
| | | | | | | | - Removed MSI support from driver - unused feature - Replaced request_mem_region with pci_request_regions Signed-off-by: Veena Parat <veena.parat@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* S2IO: Removing 3 buffer mode support from the driverVeena Parat2007-07-301-2/+1
| | | | | | | | | - Removed 3 buffer mode support from driver - unused feature - Incorporated Jeff Garzik's comments on elimination of inline typecasting - Code cleanup : Removed a few extra spaces Signed-off-by: Veena Parat <veena.parat@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* PCI: Change all drivers to use pci_device->revisionAuke Kok2007-07-111-1/+0
| | | | | | | | | | | | | | | | | | | | Instead of all drivers reading pci config space to get the revision ID, they can now use the pci_device->revision member. This exposes some issues where drivers where reading a word or a dword for the revision number, and adding useless error-handling around the read. Some drivers even just read it for no purpose of all. In devices where the revision ID is being copied over and used in what appears to be the equivalent of hotpath, I have left the copy code and the cached copy as not to influence the driver's performance. Compile tested with make all{yes,mod}config on x86_64 and i386. Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com> Acked-by: Dave Jones <davej@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* s2io: add PCI error recovery supportLinas Vepstas2007-07-081-1/+0
| | | | | | | s2io cleanup suggestions, per discussion on mailing lists. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* s2io: add PCI error recovery supportLinas Vepstas2007-07-081-0/+5
| | | | | | | | | | | | | | This patch adds PCI error recovery support to the s2io 10-Gigabit ethernet device driver. Third revision, blocks interrupts and the watchdog. Tested, seems to work well. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Acked-by: Ramkrishna Vepa <Ramkrishna.Vepa@neterion.com> Cc: Raghavendra Koushik <raghavendra.koushik@neterion.com> Cc: Wen Xiong <wenxiong@us.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* S2IO: Statistics for link up/down and memory allocated/freedSreenivasa Honnur2007-05-111-0/+24
| | | | | | | | | 1. Added statistics for link up/down, last link up/down. 2. Statistics for memory allocated/freed. 3. Changed level of some DBG_PRINTs. Signed-off-by: Sreenivasa Honnur <sreenivasa.honnur@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* S2IO: statistics for memory allocation failuersSreenivasa Honnur2007-05-111-0/+3
| | | | | | | | | 1. Added code to count the number of memory failures. 2. Added watchdog_timer counter. 3. Changed debug level for some DBG_PRINTS. Signed-off-by: Sreenivasa Honnur <sreenivasa.honnur@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* S2IO: getringparam ethtool optionSreenivasa Honnur2007-05-111-0/+5
| | | | | | | Adding get_ringparam ethtool option. Signed-off-by: Sreenivasa Honnur <sreenivasa.honnur@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* S2io: Remove unused variablesRamkrishna Vepa2007-04-281-7/+1
| | | | | | | | | | | | | - Remove unused variables from s2io_nic structure - Changed the memory failure printk messages to print only in debug mode - Updated the copyright messages (Resending; due to patch being corrupted) Signed-off-by: Santosh Rastapur <santosh.rastapur@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* S2IO: Added a loadable parameter to enable or disable vlan stripping in frame.Sivakumar Subramani2007-02-271-0/+3
| | | | | | | | | | - Added code to not to strip vlan tag when driver is in promiscuous mode - Added module loadable parameter 'vlan_tag_strip" through which user can enable or disable vlan stripping irrespective of mode ( promiscuous or non-promiscuous ). Signed-off-by: Sivakumar Subramani <sivakumar.subramani@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* S2IO: Optimized the delay to wait for command completionSivakumar Subramani2007-02-271-2/+5
| | | | | | | | | | | - Optimized delay to wait for command completion so as to reduce the initialization wait time. - Disable differentiated services steering. By default RMAC is configured to steer traffic with certain DS codes to other queues. Driver must initialize the DS memory to 0 to make sure that DS steering will not be used by default. Signed-off-by: Sivakumar Subramani <sivakumar.subramani@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [PATCH] trivial s2io annotationsAl Viro2007-02-091-3/+3
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* s2io: De-typedef driver.Ralf Baechle2007-02-051-98/+104
| | | | | | | Removed namespace collisions due to usage of nic_t as per Ralf's patch Signed-off-by: Sivakumar Subramani <sivakumar.subramani@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* S2IO: Fixes for reset and link handling.Sivakumar Subramani2007-02-051-6/+15
| | | | | | | | | | 1. Fix for reset and link handling. 2. Allow for promiscuos mode and multicast state be maintained through ifconfig up and down. 3. Support to print adapter serial number. Signed-off-by: Sivakumar Subramani <sivakumar.subramani@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* s2io: Making LRO and UFO as module loadable parameter.Sivakumar Subramani2007-02-051-8/+0
| | | | | | | | | | This patch adds two load parameters napi and ufo. Previously NAPI was compilation option with these changes wan enable disable NAPI using load parameter. Also we are introducing ufo load parameter to enable/disable ufo feature Signed-off-by: Sivakumar Subramani <sivakumar.subramani@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* WorkStruct: make allyesconfigDavid Howells2006-11-221-1/+1
| | | | | | Fix up for make allyesconfig. Signed-Off-By: David Howells <dhowells@redhat.com>
* [PATCH] endianness annotations in s2ioAl Viro2006-10-101-161/+161
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* IRQ: Maintain regs pointer globally rather than passing to IRQ handlersDavid Howells2006-10-051-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
* drivers/net: const-ify ethtool_ops declarationsJeff Garzik2006-09-131-1/+1
| | | | Signed-off-by: Jeff Garzik <jeff@garzik.org>
* drivers/net: Trim trailing whitespaceJeff Garzik2006-09-131-4/+4
| | | | Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [PATCH] s2io driver bug fixes #2Ananda Raju2006-08-031-0/+5
| | | | | | | | | | | | | | | | | | | This patch contains some of the bug fixes and enhancements done to s2io driver. Following are the brief description of changes 1. code cleanup to handle gso modification better 2. Move repeated code in rx path, to a common function s2io_chk_rx_buffers() 3. Bug fix in MSI interrupt 4. clear statistics when card is down 5. Avoid linked list traversing in lro aggregation. 6. Use pci_dma_sync_single_for_cpu for buffer0 in case of 2/3 buffer mode. 7. ethtool tso get/set functions to set clear NETIF_F_TSO6 8. Stop LRO aggregation when we receive ECN notification Signed-off-by: Ananda Raju <ananda.raju@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [PATCH] s2io driver bug fixes #1Ananda Raju2006-08-031-0/+5
| | | | | | | | | | | | | | | This patch contains some of the bug fixes and enhancements done to s2io driver. Following are the brief description of changes 1. Introduced macro "S2IO_PARM_INT" for declaring integer load parameter 2. UDP_RR test failure, memset txdl after Tx completion 3. PXE boot may leave adapter in unknown state so do reset in probe. 4. Add Tx completion code in netpoll 5. In s2io_vpd_read() move array vpd_data[] to pointer, saves stack memory 6. Fix bug in ethtool online test Signed-off-by: Ananda Raju <ananda.raju@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [PATCH] s2io driver irq fixAnanda Raju2006-07-121-3/+2
| | | | | | | | | | | | | Modification and bug fixes with respect to irq registration. - Enable interrupts after request_irq - Restored MSI data register value at driver unload time Signed-off-by: Ananda Raju <ananda.raju@neterion.com> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* typo fixes: infomation -> informationAdrian Bunk2006-06-301-1/+1
| | | | Signed-off-by: Adrian Bunk <bunk@stusta.de>
* [PATCH] s2io: additional statsAnanda Raju2006-05-021-0/+28
| | | | | | | | | Hi, This patch contains additional statistics counters added to s2io driver these statistics are very much usefull in debugging the driver. Signed-off-by: Ananda Raju <ananda.raju@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [PATCH] s2io: fixesAnanda Raju2006-05-021-12/+18
| | | | | | | | | | | | | | | | | | | | Hi, This patch contains some of the bug fixes done for S2io driver. Following are the brief description of changes 1. Continuing with initialization if we get minimum required MSI-X vectors 2. fix for ethtool online link test fails 3. make wait_for_cmd_complete generic for all command status registers 4. Print "Device is on PCI-E bus" for Xframe-E card 5. CX4 requires additional delay after sw_reset, and requires higher value for igp 6. Fixed panic due to non-TCP and/or LLC/SNAP traffic in case of lro 7. remove legacy code for old transponder 8. SPECIAL_REG_WRITE made to use 32-bit writes irrespective of system type 9. handle link interrupt as per user guide for Xframe II 10. Wait till all interrupts hndled Signed-off-by: Ananda Raju <ananda.raju@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [PATCH] s2io: input parms, output messages updateAnanda Raju2006-05-021-3/+6
| | | | | | | | | | | | | | | hi, This patch contains the modification and bug fixes with respect to input parameters and outupt dmesages. following is brief description of the changes. 1. Set default values for rx_ring_sz[0..7] and tx_fifo_len[0..7] 2. verify few basic load parameters 3. read product description from VPD 4. clean up of dmesg when driver is loaded Signed-off-by: Ananda Raju <ananda.raju@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
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