From: Jiri Pirko <jiri@resnulli.us>
To: Steve Lin <steven.lin1@broadcom.com>
Cc: netdev@vger.kernel.org, jiri@mellanox.com, davem@davemloft.net,
michael.chan@broadcom.com, linux-pci@vger.kernel.org,
linville@tuxdriver.com, gospo@broadcom.com
Subject: Re: [RFC 1/3] devlink: Add config parameter get/set operations
Date: Thu, 12 Oct 2017 16:03:17 +0200 [thread overview]
Message-ID: <20171012140317.GC14672@nanopsycho> (raw)
In-Reply-To: <1507815262-33294-2-git-send-email-steven.lin1@broadcom.com>
Thu, Oct 12, 2017 at 03:34:20PM CEST, steven.lin1@broadcom.com wrote:
>Add support for config parameter get/set commands. Initially used by
>bnxt driver, but other drivers can use the same, or new, attributes.
>The config_get() and config_set() operations operate as expected, but
>note that the driver implementation of the config_set() operation can
>indicate whether a restart is necessary for the setting to take
>effect.
>
First of all, I like this approach.
I would like to see this patch split into:
1) config-options infrastructure introduction
2) specific config options introductions - would be best to have it
per-option. We need to make sure every option is very well described
and explained usecases. This is needed in order vendors to share
attributes among drivers.
More nits inlined.
>Signed-off-by: Steve Lin <steven.lin1@broadcom.com>
>Acked-by: Andy Gospodarek <gospo@broadcom.com>
>---
> include/net/devlink.h | 4 +
> include/uapi/linux/devlink.h | 108 ++++++++++++++++++++++
> net/core/devlink.c | 207 +++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 319 insertions(+)
>
>diff --git a/include/net/devlink.h b/include/net/devlink.h
>index b9654e1..952966c 100644
>--- a/include/net/devlink.h
>+++ b/include/net/devlink.h
>@@ -270,6 +270,10 @@ struct devlink_ops {
> int (*eswitch_inline_mode_set)(struct devlink *devlink, u8 inline_mode);
> int (*eswitch_encap_mode_get)(struct devlink *devlink, u8 *p_encap_mode);
> int (*eswitch_encap_mode_set)(struct devlink *devlink, u8 encap_mode);
>+ int (*config_get)(struct devlink *devlink, enum devlink_attr attr,
>+ u32 *value);
>+ int (*config_set)(struct devlink *devlink, enum devlink_attr attr,
>+ u32 value, u8 *restart_reqd);
> };
>
> static inline void *devlink_priv(struct devlink *devlink)
>diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h
>index 0cbca96..e959716 100644
>--- a/include/uapi/linux/devlink.h
>+++ b/include/uapi/linux/devlink.h
>@@ -70,6 +70,9 @@ enum devlink_command {
> DEVLINK_CMD_DPIPE_HEADERS_GET,
> DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
>
>+ DEVLINK_CMD_CONFIG_GET,
>+ DEVLINK_CMD_CONFIG_SET,
>+
> /* add new commands above here */
> __DEVLINK_CMD_MAX,
> DEVLINK_CMD_MAX = __DEVLINK_CMD_MAX - 1
>@@ -124,6 +127,68 @@ enum devlink_eswitch_encap_mode {
> DEVLINK_ESWITCH_ENCAP_MODE_BASIC,
> };
>
>+enum devlink_dcbx_mode {
>+ DEVLINK_DCBX_MODE_DISABLED,
>+ DEVLINK_DCBX_MODE_IEEE,
>+ DEVLINK_DCBX_MODE_CEE,
>+ DEVLINK_DCBX_MODE_IEEE_CEE,
>+};
>+
>+enum devlink_multifunc_mode {
>+ DEVLINK_MULTIFUNC_MODE_ALLOWED, /* Ext switch activates MF */
>+ DEVLINK_MULTIFUNC_MODE_FORCE_SINGFUNC,
>+ DEVLINK_MULTIFUNC_MODE_NPAR10, /* NPAR 1.0 */
>+ DEVLINK_MULTIFUNC_MODE_NPAR15, /* NPAR 1.5 */
>+ DEVLINK_MULTIFUNC_MODE_NPAR20, /* NPAR 2.0 */
>+};
>+
>+enum devlink_autoneg_protocol {
>+ DEVLINK_AUTONEG_PROTOCOL_IEEE8023BY_BAM,
>+ DEVLINK_AUTONEG_PROTOCOL_IEEE8023BY_CONSORTIUM,
>+ DEVLINK_AUTONEG_PROTOCOL_IEEE8023BY,
>+ DEVLINK_AUTONEG_PROTOCOL_BAM, /* Broadcom Autoneg Mode */
>+ DEVLINK_AUTONEG_PROTOCOL_CONSORTIUM, /* Consortium Autoneg Mode */
>+};
>+
>+enum devlink_pre_os_link_speed {
>+ DEVLINK_PRE_OS_LINK_SPEED_AUTONEG,
>+ DEVLINK_PRE_OS_LINK_SPEED_1G,
>+ DEVLINK_PRE_OS_LINK_SPEED_10G,
>+ DEVLINK_PRE_OS_LINK_SPEED_25G,
>+ DEVLINK_PRE_OS_LINK_SPEED_40G,
>+ DEVLINK_PRE_OS_LINK_SPEED_50G,
>+ DEVLINK_PRE_OS_LINK_SPEED_100G,
>+ DEVLINK_PRE_OS_LINK_SPEED_5G = 0xe,
>+ DEVLINK_PRE_OS_LINK_SPEED_100M = 0xf,
>+};
>+
>+enum devlink_mba_boot_type {
>+ DEVLINK_MBA_BOOT_TYPE_AUTO_DETECT,
>+ DEVLINK_MBA_BOOT_TYPE_BBS, /* BIOS Boot Specification */
>+ DEVLINK_MBA_BOOT_TYPE_INTR18, /* Hook interrupt 0x18 */
>+ DEVLINK_MBA_BOOT_TYPE_INTR19, /* Hook interrupt 0x19 */
>+};
>+
>+enum devlink_mba_setup_hot_key {
>+ DEVLINK_MBA_SETUP_HOT_KEY_CTRL_S,
>+ DEVLINK_MBA_SETUP_HOT_KEY_CTRL_B,
>+};
>+
>+enum devlink_mba_boot_protocol {
>+ DEVLINK_MBA_BOOT_PROTOCOL_PXE,
>+ DEVLINK_MBA_BOOT_PROTOCOL_ISCSI,
>+ DEVLINK_MBA_BOOT_PROTOCOL_NONE = 0x7,
>+};
>+
>+enum devlink_mba_link_speed {
>+ DEVLINK_MBA_LINK_SPEED_AUTONEG,
>+ DEVLINK_MBA_LINK_SPEED_1G,
>+ DEVLINK_MBA_LINK_SPEED_10G,
>+ DEVLINK_MBA_LINK_SPEED_25G,
>+ DEVLINK_MBA_LINK_SPEED_40G,
>+ DEVLINK_MBA_LINK_SPEED_50G,
>+};
>+
> enum devlink_attr {
> /* don't change the order or add anything between, this is ABI! */
> DEVLINK_ATTR_UNSPEC,
>@@ -202,6 +267,49 @@ enum devlink_attr {
>
> DEVLINK_ATTR_ESWITCH_ENCAP_MODE, /* u8 */
>
>+ /* Configuration Parameters */
>+ DEVLINK_ATTR_SRIOV_ENABLED, /* u8 */
>+ DEVLINK_ATTR_NUM_VF_PER_PF, /* u32 */
>+ DEVLINK_ATTR_MAX_NUM_PF_MSIX_VECT, /* u32 */
>+ DEVLINK_ATTR_MSIX_VECTORS_PER_VF, /* u32 */
>+ DEVLINK_ATTR_NPAR_NUM_PARTITIONS_PER_PORT, /* u32 */
>+ DEVLINK_ATTR_NPAR_BW_IN_PERCENT, /* u8 */
>+ DEVLINK_ATTR_NPAR_BW_RESERVATION, /* u8 */
>+ DEVLINK_ATTR_NPAR_BW_RESERVATION_VALID, /* u8 */
>+ DEVLINK_ATTR_NPAR_BW_LIMIT, /* u8 */
>+ DEVLINK_ATTR_NPAR_BW_LIMIT_VALID, /* u8 */
>+ DEVLINK_ATTR_DCBX_MODE, /* u8 */
>+ DEVLINK_ATTR_RDMA_ENABLED, /* u8 */
>+ DEVLINK_ATTR_MULTIFUNC_MODE, /* u8 */
>+ DEVLINK_ATTR_SECURE_NIC_ENABLED, /* u8 */
>+ DEVLINK_ATTR_IGNORE_ARI_CAPABILITY, /* u8 */
>+ DEVLINK_ATTR_LLDP_NEAREST_BRIDGE_ENABLED, /* u8 */
>+ DEVLINK_ATTR_LLDP_NEAREST_NONTPMR_BRIDGE_ENABLED, /* u8 */
>+ DEVLINK_ATTR_PME_CAPABILITY_ENABLED, /* u8 */
>+ DEVLINK_ATTR_MAGIC_PACKET_WOL_ENABLED, /* u8 */
>+ DEVLINK_ATTR_EEE_PWR_SAVE_ENABLED, /* u8 */
>+ DEVLINK_ATTR_AUTONEG_PROTOCOL, /* u8 */
>+ DEVLINK_ATTR_MEDIA_AUTO_DETECT, /* u8 */
>+ DEVLINK_ATTR_PHY_SELECT, /* u8 */
>+ DEVLINK_ATTR_PRE_OS_LINK_SPEED_D0, /* u8 */
>+ DEVLINK_ATTR_PRE_OS_LINK_SPEED_D3, /* u8 */
>+ DEVLINK_ATTR_MBA_ENABLED, /* u8 */
>+ DEVLINK_ATTR_MBA_BOOT_TYPE, /* u8 */
>+ DEVLINK_ATTR_MBA_DELAY_TIME, /* u32 */
>+ DEVLINK_ATTR_MBA_SETUP_HOT_KEY, /* u8 */
>+ DEVLINK_ATTR_MBA_HIDE_SETUP_PROMPT, /* u8 */
>+ DEVLINK_ATTR_MBA_BOOT_RETRY_COUNT, /* u32 */
>+ DEVLINK_ATTR_MBA_VLAN_ENABLED, /* u8 */
>+ DEVLINK_ATTR_MBA_VLAN_TAG, /* u16 */
>+ DEVLINK_ATTR_MBA_BOOT_PROTOCOL, /* u8 */
>+ DEVLINK_ATTR_MBA_LINK_SPEED, /* u8 */
Okay, I think it is about the time we should start thinking about
putting this new config attributes under nester attribute. What do you
think?
>+
>+ /* When config doesn't take effect until next reboot (config
>+ * just changed NVM which isn't read until boot, for example),
>+ * this attribute should be set by the driver.
>+ */
>+ DEVLINK_ATTR_RESTART_REQUIRED, /* u8 */
>+
> /* add new attributes above here, update the policy in devlink.c */
>
> __DEVLINK_ATTR_MAX,
>diff --git a/net/core/devlink.c b/net/core/devlink.c
>index 7d430c1..701c84b 100644
>--- a/net/core/devlink.c
>+++ b/net/core/devlink.c
>@@ -1566,6 +1566,164 @@ static int devlink_nl_cmd_eswitch_set_doit(struct sk_buff *skb,
> return 0;
> }
>
>+static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1];
>+
>+static int devlink_nl_config_fill(struct sk_buff *msg,
>+ struct devlink *devlink,
>+ enum devlink_command cmd,
>+ struct genl_info *info)
>+{
>+ const struct devlink_ops *ops = devlink->ops;
>+ void *hdr;
>+ int err;
>+ enum devlink_attr attr = -1;
-1 is not a valid enum value. Better to just have bool to indicate attr
was found or not.
>+ u32 value;
>+ int i;
>+ struct nla_policy policy;
>+ u8 restart_reqd;
>+
>+ if (!ops->config_get)
>+ return -EOPNOTSUPP;
>+
>+ hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
>+ &devlink_nl_family, 0, cmd);
>+ if (!hdr) {
>+ err = -EMSGSIZE;
>+ goto nla_msg_failure;
>+ }
>+
>+ err = devlink_nl_put_handle(msg, devlink);
>+ if (err)
>+ goto nla_put_failure;
>+
>+ for (i = 0; i < DEVLINK_ATTR_MAX; i++)
>+ if (info->attrs[i])
>+ attr = i;
>+
>+ if (attr == -1) {
>+ /* Not found - invalid/unknown attribute? */
>+ err = -EINVAL;
>+ goto nla_put_failure;
>+ }
>+
>+ policy = devlink_nl_policy[attr];
>+
>+ if (cmd == DEVLINK_CMD_CONFIG_GET) {
>+ err = ops->config_get(devlink, attr, &value);
>+
>+ if (err)
>+ goto nla_put_failure;
>+
>+ switch (policy.type) {
>+ case NLA_U8:
>+ err = nla_put_u8(msg, attr, value);
>+ break;
>+ case NLA_U16:
>+ err = nla_put_u16(msg, attr, value);
>+ break;
>+ case NLA_U32:
>+ err = nla_put_u32(msg, attr, value);
>+ break;
>+ default:
>+ goto nla_put_failure;
>+ }
>+
>+ if (err)
>+ goto nla_put_failure;
>+ } else {
>+ /* Must be config_set command */
>+ u8 *val8;
>+ u16 *val16;
>+ u32 *val32;
>+
>+ switch (policy.type) {
>+ case NLA_U8:
>+ val8 = nla_data(info->attrs[attr]);
>+ value = *val8;
>+ break;
>+ case NLA_U16:
>+ val16 = nla_data(info->attrs[attr]);
>+ value = *val16;
>+ break;
>+ case NLA_U32:
>+ val32 = nla_data(info->attrs[attr]);
>+ value = *val32;
>+ break;
>+ default:
>+ goto nla_put_failure;
>+ }
>+
>+ err = ops->config_set(devlink, attr, value, &restart_reqd);
>+ if (err)
>+ goto nla_put_failure;
>+
>+ if (restart_reqd) {
>+ err = nla_put_u8(msg, DEVLINK_ATTR_RESTART_REQUIRED,
>+ restart_reqd);
>+ if (err)
>+ goto nla_put_failure;
>+ }
>+ }
>+
>+ genlmsg_end(msg, hdr);
>+ return 0;
>+
>+nla_put_failure:
>+ genlmsg_cancel(msg, hdr);
>+nla_msg_failure:
>+ return err;
>+}
>+
>+static int devlink_nl_cmd_config_get_doit(struct sk_buff *skb,
>+ struct genl_info *info)
>+{
>+ struct devlink *devlink = info->user_ptr[0];
>+ struct sk_buff *msg;
>+ int err;
>+
>+ if (!devlink->ops)
>+ return -EOPNOTSUPP;
>+
>+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
>+ if (!msg)
>+ return -ENOMEM;
>+
>+ err = devlink_nl_config_fill(msg, devlink, DEVLINK_CMD_CONFIG_GET,
>+ info);
>+
>+ if (err) {
>+ nlmsg_free(msg);
>+ return err;
>+ }
>+
>+ return genlmsg_reply(msg, info);
>+}
>+
>+static int devlink_nl_cmd_config_set_doit(struct sk_buff *skb,
>+ struct genl_info *info)
>+{
>+ struct devlink *devlink = info->user_ptr[0];
>+ struct sk_buff *msg;
>+ int err;
>+
>+ if (!devlink->ops)
>+ return -EOPNOTSUPP;
>+
>+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
>+ if (!msg)
>+ return -ENOMEM;
>+
>+ err = devlink_nl_config_fill(msg, devlink, DEVLINK_CMD_CONFIG_SET,
>+ info);
This is odd. You are using "fill" function for "set". It should be used
for "get". But for set, it really sounds odd. Please split the
devlink_nl_config_fill function into get and set parts.
Also, get should dump all available options.
>+
>+ if (err) {
>+ nlmsg_free(msg);
>+ return err;
>+ }
>+
>+ return genlmsg_reply(msg, info);
>+}
>+
> int devlink_dpipe_match_put(struct sk_buff *skb,
> struct devlink_dpipe_match *match)
> {
>@@ -2291,6 +2449,41 @@ static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
> [DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 },
> [DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },
> [DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED] = { .type = NLA_U8 },
>+ [DEVLINK_ATTR_SRIOV_ENABLED] = { .type = NLA_U8 },
>+ [DEVLINK_ATTR_NUM_VF_PER_PF] = { .type = NLA_U32 },
>+ [DEVLINK_ATTR_MAX_NUM_PF_MSIX_VECT] = { .type = NLA_U32 },
>+ [DEVLINK_ATTR_MSIX_VECTORS_PER_VF] = { .type = NLA_U32 },
>+ [DEVLINK_ATTR_NPAR_NUM_PARTITIONS_PER_PORT] = { .type = NLA_U32 },
>+ [DEVLINK_ATTR_NPAR_BW_IN_PERCENT] = { .type = NLA_U32 },
>+ [DEVLINK_ATTR_NPAR_BW_RESERVATION] = { .type = NLA_U32 },
>+ [DEVLINK_ATTR_NPAR_BW_RESERVATION_VALID] = { .type = NLA_U8 },
>+ [DEVLINK_ATTR_NPAR_BW_LIMIT] = { .type = NLA_U32 },
>+ [DEVLINK_ATTR_NPAR_BW_LIMIT_VALID] = { .type = NLA_U8 },
>+ [DEVLINK_ATTR_DCBX_MODE] = { .type = NLA_U32 },
>+ [DEVLINK_ATTR_RDMA_ENABLED] = { .type = NLA_U8 },
>+ [DEVLINK_ATTR_MULTIFUNC_MODE] = { .type = NLA_U32 },
>+ [DEVLINK_ATTR_SECURE_NIC_ENABLED] = { .type = NLA_U8 },
>+ [DEVLINK_ATTR_IGNORE_ARI_CAPABILITY] = { .type = NLA_U8 },
>+ [DEVLINK_ATTR_LLDP_NEAREST_BRIDGE_ENABLED] = { .type = NLA_U8 },
>+ [DEVLINK_ATTR_LLDP_NEAREST_NONTPMR_BRIDGE_ENABLED] = { .type = NLA_U8 },
>+ [DEVLINK_ATTR_PME_CAPABILITY_ENABLED] = { .type = NLA_U8 },
>+ [DEVLINK_ATTR_MAGIC_PACKET_WOL_ENABLED] = { .type = NLA_U8 },
>+ [DEVLINK_ATTR_EEE_PWR_SAVE_ENABLED] = { .type = NLA_U8 },
>+ [DEVLINK_ATTR_AUTONEG_PROTOCOL] = { .type = NLA_U32 },
>+ [DEVLINK_ATTR_MEDIA_AUTO_DETECT] = { .type = NLA_U8 },
>+ [DEVLINK_ATTR_PHY_SELECT] = { .type = NLA_U8 },
>+ [DEVLINK_ATTR_PRE_OS_LINK_SPEED_D0] = { .type = NLA_U32 },
>+ [DEVLINK_ATTR_PRE_OS_LINK_SPEED_D3] = { .type = NLA_U32 },
>+ [DEVLINK_ATTR_MBA_ENABLED] = { .type = NLA_U8 },
>+ [DEVLINK_ATTR_MBA_BOOT_TYPE] = { .type = NLA_U32 },
>+ [DEVLINK_ATTR_MBA_DELAY_TIME] = { .type = NLA_U32 },
>+ [DEVLINK_ATTR_MBA_SETUP_HOT_KEY] = { .type = NLA_U32 },
>+ [DEVLINK_ATTR_MBA_HIDE_SETUP_PROMPT] = { .type = NLA_U8 },
>+ [DEVLINK_ATTR_MBA_BOOT_RETRY_COUNT] = { .type = NLA_U32 },
>+ [DEVLINK_ATTR_MBA_VLAN_ENABLED] = { .type = NLA_U8 },
>+ [DEVLINK_ATTR_MBA_VLAN_TAG] = { .type = NLA_U16 },
>+ [DEVLINK_ATTR_MBA_BOOT_PROTOCOL] = { .type = NLA_U32 },
>+ [DEVLINK_ATTR_MBA_LINK_SPEED] = { .type = NLA_U32 },
> };
>
> static const struct genl_ops devlink_nl_ops[] = {
>@@ -2451,6 +2644,20 @@ static const struct genl_ops devlink_nl_ops[] = {
> .flags = GENL_ADMIN_PERM,
> .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
> },
>+ {
>+ .cmd = DEVLINK_CMD_CONFIG_GET,
>+ .doit = devlink_nl_cmd_config_get_doit,
>+ .policy = devlink_nl_policy,
>+ .flags = GENL_ADMIN_PERM,
>+ .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
>+ },
>+ {
>+ .cmd = DEVLINK_CMD_CONFIG_SET,
>+ .doit = devlink_nl_cmd_config_set_doit,
>+ .policy = devlink_nl_policy,
>+ .flags = GENL_ADMIN_PERM,
>+ .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
>+ },
> };
>
> static struct genl_family devlink_nl_family __ro_after_init = {
>--
>2.7.4
>
next prev parent reply other threads:[~2017-10-12 14:03 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-12 13:34 [RFC 0/3] Adding config get/set to devlink Steve Lin
2017-10-12 13:34 ` [RFC 1/3] devlink: Add config parameter get/set operations Steve Lin
2017-10-12 14:03 ` Jiri Pirko [this message]
2017-10-12 14:37 ` Steve Lin
2017-10-12 18:12 ` Andy Gospodarek
2017-10-13 7:04 ` Jiri Pirko
2017-10-12 14:15 ` Jiri Pirko
2017-10-12 13:34 ` [RFC 2/3] bnxt: Move generic devlink code to new file Steve Lin
2017-10-12 13:34 ` [RFC 3/3] bnxt: Add devlink support for config get/set Steve Lin
2017-10-12 14:35 ` [RFC 0/3] Adding config get/set to devlink Roopa Prabhu
2017-10-12 14:40 ` Jiri Pirko
2017-10-12 14:46 ` Roopa Prabhu
2017-10-12 15:04 ` Jiri Pirko
2017-10-12 15:31 ` Roopa Prabhu
2017-10-12 15:43 ` Florian Fainelli
2017-10-12 16:05 ` Roopa Prabhu
2017-10-12 19:06 ` David Miller
2017-10-12 19:20 ` Florian Fainelli
2017-10-12 20:12 ` Steve Lin
2017-10-13 7:08 ` Jiri Pirko
2017-10-12 21:36 ` Michal Kubecek
2017-10-12 21:53 ` Roopa Prabhu
2017-10-13 7:11 ` Jiri Pirko
2017-10-14 4:21 ` Roopa Prabhu
2017-10-12 19:01 ` David Miller
2017-10-12 19:01 ` David Miller
2017-10-12 18:59 ` David Miller
2017-10-12 14:45 ` Steve Lin
2017-10-12 14:51 ` Roopa Prabhu
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