bea3348eef
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>
98 lines
5.1 KiB
C
98 lines
5.1 KiB
C
/*****************************************************************************
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* *
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* File: sge.h *
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* $Revision: 1.11 $ *
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* $Date: 2005/06/21 22:10:55 $ *
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* Description: *
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* part of the Chelsio 10Gb Ethernet Driver. *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License, version 2, as *
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* published by the Free Software Foundation. *
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* *
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* You should have received a copy of the GNU General Public License along *
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* with this program; if not, write to the Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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* *
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED *
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF *
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. *
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* *
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* http://www.chelsio.com *
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* *
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* Copyright (c) 2003 - 2005 Chelsio Communications, Inc. *
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* All rights reserved. *
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* *
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* Maintainers: maintainers@chelsio.com *
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* *
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* Authors: Dimitrios Michailidis <dm@chelsio.com> *
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* Tina Yang <tainay@chelsio.com> *
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* Felix Marti <felix@chelsio.com> *
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* Scott Bardone <sbardone@chelsio.com> *
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* Kurt Ottaway <kottaway@chelsio.com> *
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* Frank DiMambro <frank@chelsio.com> *
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* *
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* History: *
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* *
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****************************************************************************/
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#ifndef _CXGB_SGE_H_
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#define _CXGB_SGE_H_
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#include <linux/types.h>
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#include <linux/interrupt.h>
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#include <asm/byteorder.h>
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struct sge_intr_counts {
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unsigned int rx_drops; /* # of packets dropped due to no mem */
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unsigned int pure_rsps; /* # of non-payload responses */
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unsigned int unhandled_irqs; /* # of unhandled interrupts */
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unsigned int respQ_empty; /* # times respQ empty */
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unsigned int respQ_overflow; /* # respQ overflow (fatal) */
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unsigned int freelistQ_empty; /* # times freelist empty */
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unsigned int pkt_too_big; /* packet too large (fatal) */
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unsigned int pkt_mismatch;
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unsigned int cmdQ_full[3]; /* not HW IRQ, host cmdQ[] full */
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unsigned int cmdQ_restarted[3];/* # of times cmdQ X was restarted */
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};
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struct sge_port_stats {
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u64 rx_packets; /* # of Ethernet packets received */
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u64 rx_cso_good; /* # of successful RX csum offloads */
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u64 tx_packets; /* # of TX packets */
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u64 tx_cso; /* # of TX checksum offloads */
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u64 tx_tso; /* # of TSO requests */
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u64 vlan_xtract; /* # of VLAN tag extractions */
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u64 vlan_insert; /* # of VLAN tag insertions */
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};
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struct sk_buff;
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struct net_device;
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struct adapter;
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struct sge_params;
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struct sge;
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struct sge *t1_sge_create(struct adapter *, struct sge_params *);
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int t1_sge_configure(struct sge *, struct sge_params *);
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int t1_sge_set_coalesce_params(struct sge *, struct sge_params *);
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void t1_sge_destroy(struct sge *);
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irqreturn_t t1_interrupt(int irq, void *cookie);
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int t1_poll(struct napi_struct *, int);
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int t1_start_xmit(struct sk_buff *skb, struct net_device *dev);
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void t1_set_vlan_accel(struct adapter *adapter, int on_off);
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void t1_sge_start(struct sge *);
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void t1_sge_stop(struct sge *);
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int t1_sge_intr_error_handler(struct sge *);
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void t1_sge_intr_enable(struct sge *);
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void t1_sge_intr_disable(struct sge *);
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void t1_sge_intr_clear(struct sge *);
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const struct sge_intr_counts *t1_sge_get_intr_counts(const struct sge *sge);
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void t1_sge_get_port_stats(const struct sge *sge, int port, struct sge_port_stats *);
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void t1_sched_set_max_avail_bytes(struct sge *, unsigned int);
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void t1_sched_set_drain_bits_per_us(struct sge *, unsigned int, unsigned int);
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unsigned int t1_sched_update_parms(struct sge *, unsigned int, unsigned int,
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unsigned int);
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#endif /* _CXGB_SGE_H_ */
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