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Date: Wed, 30 Apr 2008 11:36:44 -0700
From: "Kok, Auke" <auke-jan.h.kok@...el.com>
To: Ben Hutchings <bhutchings@...arflare.com>,
Jeff Garzik <jgarzik@...ox.com>
CC: netdev@...r.kernel.org, Stephen Hemminger <shemminger@...tta.com>,
Kieran Mansley <kmansley@...arflare.com>
Subject: Re: [PATCH] ethtool: command line support for lro
Ben Hutchings wrote:
> Add lro support to command in similar manner to TSO, GSO, etc.
> The file ethtool-copy.h is updated to be sanitised version of
> ethtool.h from 2.6.25-rc4 (ie make headers_install)
>
> Based on patch by Stephen Hemminger
> <http://article.gmane.org/gmane.linux.network/88124>.
>
> My changes:
> - Changed error return codes for setting LRO to be unique.
> - Report failure to get device flags, consistent with other offload settings.
> - Fixed code spacing.
>
> Tested with the sfc driver.
>
> Signed-off-by: Ben Hutchings <bhutchings@...arflare.com>
> diff --git a/ethtool-copy.h b/ethtool-copy.h
> index 3a63224..87c7c9a 100644
> --- a/ethtool-copy.h
> +++ b/ethtool-copy.h
> @@ -39,7 +39,8 @@ struct ethtool_drvinfo {
> char bus_info[ETHTOOL_BUSINFO_LEN]; /* Bus info for this IF. */
> /* For PCI devices, use pci_name(pci_dev). */
> char reserved1[32];
> - char reserved2[16];
> + char reserved2[12];
> + __u32 n_priv_flags; /* number of flags valid in ETHTOOL_GPFLAGS */
> __u32 n_stats; /* number of u64's from ETHTOOL_GSTATS */
> __u32 testinfo_len;
> __u32 eedump_len; /* Size of data from ETHTOOL_GEEPROM (bytes) */
> @@ -219,6 +220,7 @@ struct ethtool_pauseparam {
> enum ethtool_stringset {
> ETH_SS_TEST = 0,
> ETH_SS_STATS,
> + ETH_SS_PRIV_FLAGS,
> };
>
> /* for passing string sets for data tagging */
> @@ -256,125 +258,19 @@ struct ethtool_perm_addr {
> __u8 data[0];
> };
>
> -#ifdef __KERNEL__
> -
> -struct net_device;
> -
> -/* Some generic methods drivers may use in their ethtool_ops */
> -u32 ethtool_op_get_link(struct net_device *dev);
> -u32 ethtool_op_get_tx_csum(struct net_device *dev);
> -int ethtool_op_set_tx_csum(struct net_device *dev, u32 data);
> -int ethtool_op_set_tx_hw_csum(struct net_device *dev, u32 data);
> -int ethtool_op_set_tx_ipv6_csum(struct net_device *dev, u32 data);
> -u32 ethtool_op_get_sg(struct net_device *dev);
> -int ethtool_op_set_sg(struct net_device *dev, u32 data);
> -u32 ethtool_op_get_tso(struct net_device *dev);
> -int ethtool_op_set_tso(struct net_device *dev, u32 data);
> -int ethtool_op_get_perm_addr(struct net_device *dev,
> - struct ethtool_perm_addr *addr, u8 *data);
> -u32 ethtool_op_get_ufo(struct net_device *dev);
> -int ethtool_op_set_ufo(struct net_device *dev, u32 data);
> -
> -/**
> - * ðtool_ops - Alter and report network device settings
> - * get_settings: Get device-specific settings
> - * set_settings: Set device-specific settings
> - * get_drvinfo: Report driver information
> - * get_regs: Get device registers
> - * get_wol: Report whether Wake-on-Lan is enabled
> - * set_wol: Turn Wake-on-Lan on or off
> - * get_msglevel: Report driver message level
> - * set_msglevel: Set driver message level
> - * nway_reset: Restart autonegotiation
> - * get_link: Get link status
> - * get_eeprom: Read data from the device EEPROM
> - * set_eeprom: Write data to the device EEPROM
> - * get_coalesce: Get interrupt coalescing parameters
> - * set_coalesce: Set interrupt coalescing parameters
> - * get_ringparam: Report ring sizes
> - * set_ringparam: Set ring sizes
> - * get_pauseparam: Report pause parameters
> - * set_pauseparam: Set pause paramters
> - * get_rx_csum: Report whether receive checksums are turned on or off
> - * set_rx_csum: Turn receive checksum on or off
> - * get_tx_csum: Report whether transmit checksums are turned on or off
> - * set_tx_csum: Turn transmit checksums on or off
> - * get_sg: Report whether scatter-gather is enabled
> - * set_sg: Turn scatter-gather on or off
> - * get_tso: Report whether TCP segmentation offload is enabled
> - * set_tso: Turn TCP segmentation offload on or off
> - * get_ufo: Report whether UDP fragmentation offload is enabled
> - * set_ufo: Turn UDP fragmentation offload on or off
> - * self_test: Run specified self-tests
> - * get_strings: Return a set of strings that describe the requested objects
> - * phys_id: Identify the device
> - * get_stats: Return statistics about the device
> - * get_perm_addr: Gets the permanent hardware address
> - *
> - * Description:
> +/* boolean flags controlling per-interface behavior characteristics.
> + * When reading, the flag indicates whether or not a certain behavior
> + * is enabled/present. When writing, the flag indicates whether
> + * or not the driver should turn on (set) or off (clear) a behavior.
> *
> - * get_settings:
> - * @get_settings is passed an ðtool_cmd to fill in. It returns
> - * an negative errno or zero.
> - *
> - * set_settings:
> - * @set_settings is passed an ðtool_cmd and should attempt to set
> - * all the settings this device supports. It may return an error value
> - * if something goes wrong (otherwise 0).
> - *
> - * get_eeprom:
> - * Should fill in the magic field. Don't need to check len for zero
> - * or wraparound. Fill in the data argument with the eeprom values
> - * from offset to offset + len. Update len to the amount read.
> - * Returns an error or zero.
> - *
> - * set_eeprom:
> - * Should validate the magic field. Don't need to check len for zero
> - * or wraparound. Update len to the amount written. Returns an error
> - * or zero.
> + * Some behaviors may read-only (unconditionally absent or present).
> + * If such is the case, return EINVAL in the set-flags operation if the
> + * flag differs from the read-only value.
> */
> -struct ethtool_ops {
> - int (*get_settings)(struct net_device *, struct ethtool_cmd *);
> - int (*set_settings)(struct net_device *, struct ethtool_cmd *);
> - void (*get_drvinfo)(struct net_device *, struct ethtool_drvinfo *);
> - int (*get_regs_len)(struct net_device *);
> - void (*get_regs)(struct net_device *, struct ethtool_regs *, void *);
> - void (*get_wol)(struct net_device *, struct ethtool_wolinfo *);
> - int (*set_wol)(struct net_device *, struct ethtool_wolinfo *);
> - u32 (*get_msglevel)(struct net_device *);
> - void (*set_msglevel)(struct net_device *, u32);
> - int (*nway_reset)(struct net_device *);
> - u32 (*get_link)(struct net_device *);
> - int (*get_eeprom_len)(struct net_device *);
> - int (*get_eeprom)(struct net_device *, struct ethtool_eeprom *, u8 *);
> - int (*set_eeprom)(struct net_device *, struct ethtool_eeprom *, u8 *);
> - int (*get_coalesce)(struct net_device *, struct ethtool_coalesce *);
> - int (*set_coalesce)(struct net_device *, struct ethtool_coalesce *);
> - void (*get_ringparam)(struct net_device *, struct ethtool_ringparam *);
> - int (*set_ringparam)(struct net_device *, struct ethtool_ringparam *);
> - void (*get_pauseparam)(struct net_device *, struct ethtool_pauseparam*);
> - int (*set_pauseparam)(struct net_device *, struct ethtool_pauseparam*);
> - u32 (*get_rx_csum)(struct net_device *);
> - int (*set_rx_csum)(struct net_device *, u32);
> - u32 (*get_tx_csum)(struct net_device *);
> - int (*set_tx_csum)(struct net_device *, u32);
> - u32 (*get_sg)(struct net_device *);
> - int (*set_sg)(struct net_device *, u32);
> - u32 (*get_tso)(struct net_device *);
> - int (*set_tso)(struct net_device *, u32);
> - int (*self_test_count)(struct net_device *);
> - void (*self_test)(struct net_device *, struct ethtool_test *, u64 *);
> - void (*get_strings)(struct net_device *, u32 stringset, u8 *);
> - int (*phys_id)(struct net_device *, u32);
> - int (*get_stats_count)(struct net_device *);
> - void (*get_ethtool_stats)(struct net_device *, struct ethtool_stats *, u64 *);
> - int (*get_perm_addr)(struct net_device *, struct ethtool_perm_addr *, u8 *);
> - int (*begin)(struct net_device *);
> - void (*complete)(struct net_device *);
> - u32 (*get_ufo)(struct net_device *);
> - int (*set_ufo)(struct net_device *, u32);
> +enum ethtool_flags {
> + ETH_FLAG_LRO = (1 << 15), /* LRO is enabled */
> };
> -#endif /* __KERNEL__ */
> +
>
> /* CMDs currently supported */
> #define ETHTOOL_GSET 0x00000001 /* Get settings. */
> @@ -414,6 +310,10 @@ struct ethtool_ops {
> #define ETHTOOL_SUFO 0x00000022 /* Set UFO enable (ethtool_value) */
> #define ETHTOOL_GGSO 0x00000023 /* Get GSO enable (ethtool_value) */
> #define ETHTOOL_SGSO 0x00000024 /* Set GSO enable (ethtool_value) */
> +#define ETHTOOL_GFLAGS 0x00000025 /* Get flags bitmap(ethtool_value) */
> +#define ETHTOOL_SFLAGS 0x00000026 /* Set flags bitmap(ethtool_value) */
> +#define ETHTOOL_GPFLAGS 0x00000027 /* Get driver-private flags bitmap */
> +#define ETHTOOL_SPFLAGS 0x00000028 /* Set driver-private flags bitmap */
>
> /* compatibility with older code */
> #define SPARC_ETH_GSET ETHTOOL_GSET
> diff --git a/ethtool.c b/ethtool.c
> index a668b49..5f519bc 100644
> --- a/ethtool.c
> +++ b/ethtool.c
> @@ -151,7 +151,9 @@ static struct option {
> " [ sg on|off ]\n"
> " [ tso on|off ]\n"
> " [ ufo on|off ]\n"
> - " [ gso on|off ]\n" },
> + " [ gso on|off ]\n"
> + " [ lro on|off ]\n"
> + },
> { "-i", "--driver", MODE_GDRV, "Show driver information" },
> { "-d", "--register-dump", MODE_GREGS, "Do a register dump",
> " [ raw on|off ]\n"
> @@ -200,6 +202,7 @@ static int off_sg_wanted = -1;
> static int off_tso_wanted = -1;
> static int off_ufo_wanted = -1;
> static int off_gso_wanted = -1;
> +static int off_lro_wanted = -1;
>
> static struct ethtool_pauseparam epause;
> static int gpause_changed = 0;
> @@ -310,6 +313,7 @@ static struct cmdline_info cmdline_offload[] = {
> { "tso", CMDL_BOOL, &off_tso_wanted, NULL },
> { "ufo", CMDL_BOOL, &off_ufo_wanted, NULL },
> { "gso", CMDL_BOOL, &off_gso_wanted, NULL },
> + { "lro", CMDL_BOOL, &off_lro_wanted, NULL },
> };
>
> static struct cmdline_info cmdline_pause[] = {
> @@ -1217,7 +1221,7 @@ static int dump_coalesce(void)
> return 0;
> }
>
> -static int dump_offload (int rx, int tx, int sg, int tso, int ufo, int gso)
> +static int dump_offload(int rx, int tx, int sg, int tso, int ufo, int gso, int lro)
> {
> fprintf(stdout,
> "rx-checksumming: %s\n"
> @@ -1225,13 +1229,15 @@ static int dump_offload (int rx, int tx, int sg, int tso, int ufo, int gso)
> "scatter-gather: %s\n"
> "tcp segmentation offload: %s\n"
> "udp fragmentation offload: %s\n"
> - "generic segmentation offload: %s\n",
> + "generic segmentation offload: %s\n"
> + "large receive offload: %s\n",
> rx ? "on" : "off",
> tx ? "on" : "off",
> sg ? "on" : "off",
> tso ? "on" : "off",
> ufo ? "on" : "off",
> - gso ? "on" : "off");
> + gso ? "on" : "off",
> + lro ? "on" : "off");
>
> return 0;
> }
> @@ -1495,7 +1501,8 @@ static int do_scoalesce(int fd, struct ifreq *ifr)
> static int do_goffload(int fd, struct ifreq *ifr)
> {
> struct ethtool_value eval;
> - int err, allfail = 1, rx = 0, tx = 0, sg = 0, tso = 0, ufo = 0, gso = 0;
> + int err, allfail = 1, rx = 0, tx = 0, sg = 0;
> + int tso = 0, ufo = 0, gso = 0, lro = 0;
>
> fprintf(stdout, "Offload parameters for %s:\n", devname);
>
> @@ -1559,12 +1566,22 @@ static int do_goffload(int fd, struct ifreq *ifr)
> allfail = 0;
> }
>
> + eval.cmd = ETHTOOL_GFLAGS;
> + ifr->ifr_data = (caddr_t)&eval;
> + err = ioctl(fd, SIOCETHTOOL, ifr);
> + if (err) {
> + perror("Cannot get device flags");
> + } else {
> + lro = (eval.data & ETH_FLAG_LRO) != 0;
> + allfail = 0;
> + }
> +
> if (allfail) {
> fprintf(stdout, "no offload info available\n");
> return 83;
> }
>
> - return dump_offload(rx, tx, sg, tso, ufo, gso);
> + return dump_offload(rx, tx, sg, tso, ufo, gso, lro);
> }
>
> static int do_soffload(int fd, struct ifreq *ifr)
> @@ -1641,6 +1658,30 @@ static int do_soffload(int fd, struct ifreq *ifr)
> return 90;
> }
> }
> + if (off_lro_wanted >= 0) {
> + changed = 1;
> + eval.cmd = ETHTOOL_GFLAGS;
> + eval.data = 0;
> + ifr->ifr_data = (caddr_t)&eval;
> + err = ioctl(fd, SIOCETHTOOL, ifr);
> + if (err) {
> + perror("Cannot get device flag settings");
> + return 91;
> + }
> +
> + eval.cmd = ETHTOOL_SFLAGS;
> + if (off_lro_wanted == 1)
> + eval.data |= ETH_FLAG_LRO;
> + else
> + eval.data &= ~ETH_FLAG_LRO;
> +
> + err = ioctl(fd, SIOCETHTOOL, ifr);
> + if (err) {
> + perror("Cannot set large receive offload settings");
> + return 92;
> + }
> + }
> +
> if (!changed) {
> fprintf(stdout, "no offload settings changed\n");
> }
>
what is the status of this patch?
I don't like the fact that you included the removal of a __KERNEL__ section in
this patch - that should have been a separate patch IMHO :)
otherwise I would like to see this patch included.
Auke
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