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Date:      Tue, 03 Nov 2009 19:29:25 +0000
From:      Tom Judge <tom@tomjudge.com>
To:        Stanislav Sedov <stas@FreeBSD.org>
Cc:        svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org
Subject:   Re: svn commit: r198320 - in head/sys: conf dev/bce
Message-ID:  <4AF08495.5040507@tomjudge.com>
In-Reply-To: <200910211247.n9LCl9Ab099426@svn.freebsd.org>
References:  <200910211247.n9LCl9Ab099426@svn.freebsd.org>

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Hi Stanislav,

Any chance this can be MFC'd to stable/8, stable/7 and releng/8.0?

Tom


Stanislav Sedov wrote:
> Author: stas
> Date: Wed Oct 21 12:47:09 2009
> New Revision: 198320
> URL: http://svn.freebsd.org/changeset/base/198320
> 
> Log:
>   - Introduce new option BCE_JUMBO_HDRSPLIT that allows user to enable header
>     splitting in bce(4) instead of (ab)using ZERO_COPY_SOCKETS that was not
>     propagated into if_bce.c anyway.  It is disabled by default.
>   
>   Approved by:	davidch
>   MFC after:	3 days
> 
> Modified:
>   head/sys/conf/NOTES
>   head/sys/conf/options
>   head/sys/dev/bce/if_bce.c
>   head/sys/dev/bce/if_bcereg.h
> 
> Modified: head/sys/conf/NOTES
> ==============================================================================
> --- head/sys/conf/NOTES	Wed Oct 21 12:42:25 2009	(r198319)
> +++ head/sys/conf/NOTES	Wed Oct 21 12:47:09 2009	(r198320)
> @@ -1985,6 +1985,12 @@ device		lmc
>  # only works for Tigon II chips, and has no effect for Tigon I chips.
>  options 	TI_JUMBO_HDRSPLIT
>  
> +#
> +# Use header splitting feature on bce(4) adapters.
> +# This may help to reduce the amount of jumbo-sized memory buffers used.
> +#
> +options		BCE_JUMBO_HDRSPLIT
> +
>  # These two options allow manipulating the mbuf cluster size and mbuf size,
>  # respectively.  Be very careful with NIC driver modules when changing
>  # these from their default values, because that can potentially cause a
> 
> Modified: head/sys/conf/options
> ==============================================================================
> --- head/sys/conf/options	Wed Oct 21 12:42:25 2009	(r198319)
> +++ head/sys/conf/options	Wed Oct 21 12:47:09 2009	(r198320)
> @@ -511,6 +511,7 @@ DRM_DEBUG		opt_drm.h
>  ZERO_COPY_SOCKETS	opt_zero.h
>  TI_PRIVATE_JUMBOS	opt_ti.h
>  TI_JUMBO_HDRSPLIT	opt_ti.h
> +BCE_JUMBO_HDRSPLIT	opt_bce.h
>  
>  # XXX Conflict: # of devices vs network protocol (Native ATM).
>  # This makes "atm.h" unusable.
> 
> Modified: head/sys/dev/bce/if_bce.c
> ==============================================================================
> --- head/sys/dev/bce/if_bce.c	Wed Oct 21 12:42:25 2009	(r198319)
> +++ head/sys/dev/bce/if_bce.c	Wed Oct 21 12:47:09 2009	(r198320)
> @@ -293,12 +293,12 @@ static void bce_dump_enet           (str
>  static void bce_dump_mbuf 			(struct bce_softc *, struct mbuf *);
>  static void bce_dump_tx_mbuf_chain	(struct bce_softc *, u16, int);
>  static void bce_dump_rx_mbuf_chain	(struct bce_softc *, u16, int);
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  static void bce_dump_pg_mbuf_chain	(struct bce_softc *, u16, int);
>  #endif
>  static void bce_dump_txbd			(struct bce_softc *, int, struct tx_bd *);
>  static void bce_dump_rxbd			(struct bce_softc *, int, struct rx_bd *);
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  static void bce_dump_pgbd			(struct bce_softc *, int, struct rx_bd *);
>  #endif
>  static void bce_dump_l2fhdr			(struct bce_softc *, int, struct l2_fhdr *);
> @@ -306,7 +306,7 @@ static void bce_dump_ctx			(struct bce_s
>  static void bce_dump_ftqs			(struct bce_softc *);
>  static void bce_dump_tx_chain		(struct bce_softc *, u16, int);
>  static void bce_dump_rx_chain		(struct bce_softc *, u16, int);
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  static void bce_dump_pg_chain		(struct bce_softc *, u16, int);
>  #endif
>  static void bce_dump_status_block	(struct bce_softc *);
> @@ -393,7 +393,7 @@ static int  bce_init_rx_chain		(struct b
>  static void bce_fill_rx_chain		(struct bce_softc *);
>  static void bce_free_rx_chain		(struct bce_softc *);
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  static int  bce_get_pg_buf			(struct bce_softc *, struct mbuf *, u16 *, u16 *);
>  static int  bce_init_pg_chain		(struct bce_softc *);
>  static void bce_fill_pg_chain		(struct bce_softc *);
> @@ -602,7 +602,7 @@ bce_print_adapter_info(struct bce_softc 
>  	/* Firmware version and device features. */
>  	printf("B/C (%s); Flags (", sc->bce_bc_ver);
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	printf("SPLT ");
>      i++;
>  #endif
> @@ -1066,7 +1066,7 @@ bce_attach(device_t dev)
>  	 * This may change later if the MTU size is set to
>  	 * something other than 1500.
>  	 */
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	sc->rx_bd_mbuf_alloc_size = MHLEN;
>  	/* Make sure offset is 16 byte aligned for hardware. */
>  	sc->rx_bd_mbuf_align_pad  = roundup2((MSIZE - MHLEN), 16) -
> @@ -2835,7 +2835,7 @@ bce_dma_free(struct bce_softc *sc)
>  	}
>  
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	/* Free, unmap and destroy all page buffer descriptor chain pages. */
>  	for (i = 0; i < PG_PAGES; i++ ) {
>  		if (sc->pg_bd_chain[i] != NULL) {
> @@ -2899,7 +2899,7 @@ bce_dma_free(struct bce_softc *sc)
>  		sc->rx_mbuf_tag = NULL;
>  	}
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	/* Unload and destroy the page mbuf maps. */
>  	for (i = 0; i < TOTAL_PG_BD; i++) {
>  		if (sc->pg_mbuf_map[i] != NULL) {
> @@ -3345,7 +3345,7 @@ bce_dma_alloc(device_t dev)
>  	/*
>  	 * Create a DMA tag for RX mbufs.
>  	 */
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	max_size = max_seg_size = ((sc->rx_bd_mbuf_alloc_size < MCLBYTES) ?
>  		MCLBYTES : sc->rx_bd_mbuf_alloc_size);
>  #else
> @@ -3386,7 +3386,7 @@ bce_dma_alloc(device_t dev)
>  		}
>  	}
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	/*
>  	 * Create a DMA tag for the page buffer descriptor chain,
>  	 * allocate and clear the memory, and fetch the physical
> @@ -4473,7 +4473,7 @@ bce_stop(struct bce_softc *sc)
>  	bce_disable_intr(sc);
>  
>  	/* Free RX buffers. */
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	bce_free_pg_chain(sc);
>  #endif
>  	bce_free_rx_chain(sc);
> @@ -4910,7 +4910,7 @@ bce_get_rx_buf(struct bce_softc *sc, str
>  			goto bce_get_rx_buf_exit);
>  
>  		/* This is a new mbuf allocation. */
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  		MGETHDR(m_new, M_DONTWAIT, MT_DATA);
>  #else
>  		if (sc->rx_bd_mbuf_alloc_size <= MCLBYTES)
> @@ -4991,7 +4991,7 @@ bce_get_rx_buf_exit:
>  }
>  
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  /****************************************************************************/
>  /* Encapsulate an mbuf cluster into the page chain.                        */
>  /*                                                                          */
> @@ -5100,7 +5100,7 @@ bce_get_pg_buf_exit:
>  
>  	return(rc);
>  }
> -#endif /* ZERO_COPY_SOCKETS */
> +#endif /* BCE_JUMBO_HDRSPLIT */
>  
>  /****************************************************************************/
>  /* Initialize the TX context memory.                                        */
> @@ -5456,7 +5456,7 @@ bce_free_rx_chain(struct bce_softc *sc)
>  }
>  
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  /****************************************************************************/
>  /* Allocate memory and initialize the page data structures.                 */
>  /* Assumes that bce_init_rx_chain() has not already been called.            */
> @@ -5620,7 +5620,7 @@ bce_free_pg_chain(struct bce_softc *sc)
>  
>  	DBEXIT(BCE_VERBOSE_RESET | BCE_VERBOSE_RECV | BCE_VERBOSE_UNLOAD);
>  }
> -#endif /* ZERO_COPY_SOCKETS */
> +#endif /* BCE_JUMBO_HDRSPLIT */
>  
>  
>  /****************************************************************************/
> @@ -5793,7 +5793,7 @@ bce_rx_intr(struct bce_softc *sc)
>  	unsigned int pkt_len;
>  	u16 sw_rx_cons, sw_rx_cons_idx, hw_rx_cons;
>  	u32 status;
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	unsigned int rem_len;
>  	u16 sw_pg_cons, sw_pg_cons_idx;
>  #endif
> @@ -5809,7 +5809,7 @@ bce_rx_intr(struct bce_softc *sc)
>  		bus_dmamap_sync(sc->rx_bd_chain_tag,
>  		    sc->rx_bd_chain_map[i], BUS_DMASYNC_POSTREAD);
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	/* Prepare the page chain pages to be accessed by the host CPU. */
>  	for (int i = 0; i < PG_PAGES; i++)
>  		bus_dmamap_sync(sc->pg_bd_chain_tag,
> @@ -5821,7 +5821,7 @@ bce_rx_intr(struct bce_softc *sc)
>  
>  	/* Get working copies of the driver's view of the consumer indices. */
>  	sw_rx_cons = sc->rx_cons;
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	sw_pg_cons = sc->pg_cons;
>  #endif
>  
> @@ -5882,7 +5882,7 @@ bce_rx_intr(struct bce_softc *sc)
>  		 */
>  		m_adj(m0, sizeof(struct l2_fhdr) + ETHER_ALIGN);
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  		/*
>  		 * Check whether the received frame fits in a single
>  		 * mbuf or not (i.e. packet data + FCS <=
> @@ -6056,7 +6056,7 @@ bce_rx_int_next_rx:
>  		if (m0) {
>  			/* Make sure we don't lose our place when we release the lock. */
>  			sc->rx_cons = sw_rx_cons;
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  			sc->pg_cons = sw_pg_cons;
>  #endif
>  
> @@ -6066,7 +6066,7 @@ bce_rx_int_next_rx:
>  
>  			/* Recover our place. */
>  			sw_rx_cons = sc->rx_cons;
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  			sw_pg_cons = sc->pg_cons;
>  #endif
>  		}
> @@ -6077,7 +6077,7 @@ bce_rx_int_next_rx:
>  	}
>  
>  	/* No new packets to process.  Refill the RX and page chains and exit. */
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	sc->pg_cons = sw_pg_cons;
>  	bce_fill_pg_chain(sc);
>  #endif
> @@ -6090,7 +6090,7 @@ bce_rx_int_next_rx:
>  		bus_dmamap_sync(sc->rx_bd_chain_tag,
>  		    sc->rx_bd_chain_map[i], BUS_DMASYNC_PREWRITE);
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	for (int i = 0; i < PG_PAGES; i++)
>  		bus_dmamap_sync(sc->pg_bd_chain_tag,
>  		    sc->pg_bd_chain_map[i], BUS_DMASYNC_PREWRITE);
> @@ -6336,7 +6336,7 @@ bce_init_locked(struct bce_softc *sc)
>  	 * Calculate and program the hardware Ethernet MTU
>  	 * size. Be generous on the receive if we have room.
>  	 */
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	if (ifp->if_mtu <= (sc->rx_bd_mbuf_data_len + sc->pg_bd_mbuf_alloc_size))
>  		ether_mtu = sc->rx_bd_mbuf_data_len + sc->pg_bd_mbuf_alloc_size;
>  #else
> @@ -6368,7 +6368,7 @@ bce_init_locked(struct bce_softc *sc)
>  	/* Program appropriate promiscuous/multicast filtering. */
>  	bce_set_rx_mode(sc);
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	DBPRINT(sc, BCE_INFO_LOAD, "%s(): pg_bd_mbuf_alloc_size = %d\n",
>  		__FUNCTION__, sc->pg_bd_mbuf_alloc_size);
>  
> @@ -6881,7 +6881,7 @@ bce_ioctl(struct ifnet *ifp, u_long comm
>  			BCE_LOCK(sc);
>  			ifp->if_mtu = ifr->ifr_mtu;
>  			ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  			/* No buffer allocation size changes are necessary. */
>  #else
>  			/* Recalculate our buffer allocation sizes. */
> @@ -7584,7 +7584,7 @@ bce_tick(void *xsc)
>  	bce_stats_update(sc);
>  
>  	/* Top off the receive and page chains. */
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	bce_fill_pg_chain(sc);
>  #endif
>  	bce_fill_rx_chain(sc);
> @@ -7764,7 +7764,7 @@ bce_sysctl_dump_tx_chain(SYSCTL_HANDLER_
>  }
>  
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  /****************************************************************************/
>  /* Provides a sysctl interface to allow dumping the page chain.             */
>  /*                                                                          */
> @@ -8392,7 +8392,7 @@ bce_add_sysctls(struct bce_softc *sc)
>  		(void *)sc, 0,
>  		bce_sysctl_dump_tx_chain, "I", "Dump tx_bd chain");
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	SYSCTL_ADD_PROC(ctx, children, OID_AUTO,
>  		"dump_pg_chain", CTLTYPE_INT | CTLFLAG_RW,
>  		(void *)sc, 0,
> @@ -8687,7 +8687,7 @@ bce_dump_rx_mbuf_chain(struct bce_softc 
>  }
>  
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  /****************************************************************************/
>  /* Prints out the mbufs in the mbuf page chain.                             */
>  /*                                                                          */
> @@ -8811,7 +8811,7 @@ bce_dump_rxbd(struct bce_softc *sc, int 
>  }
>  
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  /****************************************************************************/
>  /* Prints out a rx_bd structure in the page chain.                          */
>  /*                                                                          */
> @@ -9298,7 +9298,7 @@ bce_dump_rx_chain(struct bce_softc *sc, 
>  }
>  
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  /****************************************************************************/
>  /* Prints out the page chain.                                               */
>  /*                                                                          */
> @@ -9779,7 +9779,7 @@ bce_dump_driver_state(struct bce_softc *
>  		"0x%08X:%08X - (sc->rx_bd_chain) rx_bd chain virtual address\n",
>  		val_hi, val_lo);
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	val_hi = BCE_ADDR_HI(sc->pg_bd_chain);
>  	val_lo = BCE_ADDR_LO(sc->pg_bd_chain);
>  	BCE_PRINTF(
> @@ -9799,7 +9799,7 @@ bce_dump_driver_state(struct bce_softc *
>  		"0x%08X:%08X - (sc->rx_mbuf_ptr) rx mbuf chain virtual address\n",
>  		val_hi, val_lo);
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	val_hi = BCE_ADDR_HI(sc->pg_mbuf_ptr);
>  	val_lo = BCE_ADDR_LO(sc->pg_mbuf_ptr);
>  	BCE_PRINTF(
> @@ -9852,7 +9852,7 @@ bce_dump_driver_state(struct bce_softc *
>  	BCE_PRINTF("         0x%08X - (sc->free_rx_bd) free rx_bd's\n",
>  		sc->free_rx_bd);
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	BCE_PRINTF("     0x%04X(0x%04X) - (sc->pg_prod) page producer index\n",
>  		sc->pg_prod, (u16) PG_CHAIN_IDX(sc->pg_prod));
>  
> @@ -10358,7 +10358,7 @@ bce_breakpoint(struct bce_softc *sc)
>  		bce_dump_tpat_state(sc, 0);
>  		bce_dump_cp_state(sc, 0);
>  		bce_dump_com_state(sc, 0);
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  		bce_dump_pgbd(sc, 0, NULL);
>  		bce_dump_pg_mbuf_chain(sc, 0, USABLE_PG_BD);
>  		bce_dump_pg_chain(sc, 0, USABLE_PG_BD);
> 
> Modified: head/sys/dev/bce/if_bcereg.h
> ==============================================================================
> --- head/sys/dev/bce/if_bcereg.h	Wed Oct 21 12:42:25 2009	(r198319)
> +++ head/sys/dev/bce/if_bcereg.h	Wed Oct 21 12:47:09 2009	(r198320)
> @@ -6216,7 +6216,7 @@ struct l2_fhdr {
>  #define RX_PAGE(x) (((x) & ~USABLE_RX_BD_PER_PAGE) >> (BCM_PAGE_BITS - 4))
>  #define RX_IDX(x) ((x) & USABLE_RX_BD_PER_PAGE)
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  /*
>   * To accomodate jumbo frames, the page chain should
>   * be 4 times larger than the receive chain.
> @@ -6238,7 +6238,7 @@ struct l2_fhdr {
>  #define PG_PAGE(x) (((x) & ~USABLE_PG_BD_PER_PAGE) >> (BCM_PAGE_BITS - 4))
>  #define PG_IDX(x) ((x) & USABLE_PG_BD_PER_PAGE)
>  
> -#endif /* ZERO_COPY_SOCKETS */
> +#endif /* BCE_JUMBO_HDRSPLIT */
>  
>  #define CTX_INIT_RETRY_COUNT        10
>  
> @@ -6517,7 +6517,7 @@ struct bce_softc
>  	u16					tx_cons;
>  	u32					tx_prod_bseq;	/* Counts the bytes used.  */
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	u16					pg_prod;
>  	u16					pg_cons;
>  #endif
> @@ -6534,7 +6534,7 @@ struct bce_softc
>  	int					rx_bd_mbuf_data_len;
>  	int					rx_bd_mbuf_align_pad;
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	int					pg_bd_mbuf_alloc_size;
>  #endif
>  
> @@ -6556,7 +6556,7 @@ struct bce_softc
>  	struct rx_bd		*rx_bd_chain[RX_PAGES];
>  	bus_addr_t			rx_bd_chain_paddr[RX_PAGES];
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	/* H/W maintained page buffer descriptor chain structure. */
>  	bus_dma_tag_t		pg_bd_chain_tag;
>  	bus_dmamap_t		pg_bd_chain_map[PG_PAGES];
> @@ -6593,7 +6593,7 @@ struct bce_softc
>  	bus_dma_tag_t		rx_mbuf_tag;
>  	bus_dma_tag_t		tx_mbuf_tag;
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	bus_dma_tag_t		pg_mbuf_tag;
>  #endif
>  
> @@ -6605,7 +6605,7 @@ struct bce_softc
>  	bus_dmamap_t		rx_mbuf_map[TOTAL_RX_BD];
>  	struct mbuf			*rx_mbuf_ptr[TOTAL_RX_BD];
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	/* S/W maintained mbuf page chain structure. */
>  	bus_dmamap_t		pg_mbuf_map[TOTAL_PG_BD];
>  	struct mbuf			*pg_mbuf_ptr[TOTAL_PG_BD];
> @@ -6617,7 +6617,7 @@ struct bce_softc
>  	u16 used_tx_bd;
>  	u16 max_tx_bd;
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	u16 free_pg_bd;
>  	u16 max_pg_bd;
>  #endif
> @@ -6705,7 +6705,7 @@ struct bce_softc
>  	int	debug_tx_mbuf_alloc;
>  	int debug_rx_mbuf_alloc;
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	int debug_pg_mbuf_alloc;
>  #endif
>  
> @@ -6722,7 +6722,7 @@ struct bce_softc
>  	u32	rx_low_watermark;			/* Lowest number of rx_bd's free. */
>  	u32 rx_empty_count;				/* Number of times the RX chain was empty. */
>  
> -#ifdef ZERO_COPY_SOCKETS
> +#ifdef BCE_JUMBO_HDRSPLIT
>  	u32	pg_low_watermark;			/* Lowest number of pages free. */
>  	u32 pg_empty_count; 			/* Number of times the page chain was empty. */
>  #endif
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