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Message-ID: <20240806193317.1491822-3-kuba@kernel.org>
Date: Tue, 6 Aug 2024 12:33:07 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
edumazet@...gle.com,
pabeni@...hat.com,
michael.chan@...adcom.com,
shuah@...nel.org,
ecree.xilinx@...il.com,
przemyslaw.kitszel@...el.com,
ahmed.zaki@...el.com,
andrew@...n.ch,
willemb@...gle.com,
pavan.chebbi@...adcom.com,
petrm@...dia.com,
gal@...dia.com,
jdamato@...tly.com,
donald.hunter@...il.com,
Jakub Kicinski <kuba@...nel.org>,
marcin.s.wojtas@...il.com,
linux@...linux.org.uk
Subject: [PATCH net-next v3 02/12] eth: mvpp2: implement new RSS context API
Implement the separate create/modify/delete ops for RSS.
No problems with IDs - even tho RSS tables are per device
the driver already seems to allocate IDs linearly per port.
There's a translation table from per-port context ID
to device context ID.
mvpp2 doesn't have a key for the hash, it defaults to
an empty/previous indir table.
Note that there is no key at all, so we don't have to be
concerned with reporting the wrong one (which is addressed
by a patch later in the series).
Compile-tested only.
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
v3:
- fix max_context_id to be inclusive
- extend commit message with why this is different than patch 6
v2:
- copy the default indir table
- use ID from the core
- fix build issues
CC: marcin.s.wojtas@...il.com
CC: linux@...linux.org.uk
---
.../net/ethernet/marvell/mvpp2/mvpp2_cls.c | 18 +---
.../net/ethernet/marvell/mvpp2/mvpp2_cls.h | 2 +-
.../net/ethernet/marvell/mvpp2/mvpp2_main.c | 102 +++++++++++++-----
3 files changed, 79 insertions(+), 43 deletions(-)
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.c
index 40aeaa7bd739..1641791a2d5b 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.c
@@ -1522,29 +1522,19 @@ static int mvpp22_rss_context_create(struct mvpp2_port *port, u32 *rss_ctx)
return 0;
}
-int mvpp22_port_rss_ctx_create(struct mvpp2_port *port, u32 *port_ctx)
+int mvpp22_port_rss_ctx_create(struct mvpp2_port *port, u32 port_ctx)
{
u32 rss_ctx;
- int ret, i;
+ int ret;
ret = mvpp22_rss_context_create(port, &rss_ctx);
if (ret)
return ret;
- /* Find the first available context number in the port, starting from 1.
- * Context 0 on each port is reserved for the default context.
- */
- for (i = 1; i < MVPP22_N_RSS_TABLES; i++) {
- if (port->rss_ctx[i] < 0)
- break;
- }
-
- if (i == MVPP22_N_RSS_TABLES)
+ if (WARN_ON_ONCE(port->rss_ctx[port_ctx] >= 0))
return -EINVAL;
- port->rss_ctx[i] = rss_ctx;
- *port_ctx = i;
-
+ port->rss_ctx[port_ctx] = rss_ctx;
return 0;
}
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.h b/drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.h
index 663157dc8062..85c9c6e80678 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.h
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.h
@@ -264,7 +264,7 @@ int mvpp22_port_rss_init(struct mvpp2_port *port);
int mvpp22_port_rss_enable(struct mvpp2_port *port);
int mvpp22_port_rss_disable(struct mvpp2_port *port);
-int mvpp22_port_rss_ctx_create(struct mvpp2_port *port, u32 *rss_ctx);
+int mvpp22_port_rss_ctx_create(struct mvpp2_port *port, u32 rss_ctx);
int mvpp22_port_rss_ctx_delete(struct mvpp2_port *port, u32 rss_ctx);
int mvpp22_port_rss_ctx_indir_set(struct mvpp2_port *port, u32 rss_ctx,
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index 0d62a33afa80..b70aca33b928 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -5696,38 +5696,80 @@ static int mvpp2_ethtool_get_rxfh(struct net_device *dev,
return ret;
}
+static bool mvpp2_ethtool_rxfh_okay(struct mvpp2_port *port,
+ const struct ethtool_rxfh_param *rxfh)
+{
+ if (!mvpp22_rss_is_supported(port))
+ return false;
+
+ if (rxfh->hfunc != ETH_RSS_HASH_NO_CHANGE &&
+ rxfh->hfunc != ETH_RSS_HASH_CRC32)
+ return false;
+
+ if (rxfh->key)
+ return false;
+
+ return true;
+}
+
+static int mvpp2_create_rxfh_context(struct net_device *dev,
+ struct ethtool_rxfh_context *ctx,
+ const struct ethtool_rxfh_param *rxfh,
+ struct netlink_ext_ack *extack)
+{
+ struct mvpp2_port *port = netdev_priv(dev);
+ int ret = 0;
+
+ if (!mvpp2_ethtool_rxfh_okay(port, rxfh))
+ return -EOPNOTSUPP;
+
+ ctx->hfunc = ETH_RSS_HASH_CRC32;
+
+ ret = mvpp22_port_rss_ctx_create(port, rxfh->rss_context);
+ if (ret)
+ return ret;
+
+ if (!rxfh->indir)
+ ret = mvpp22_port_rss_ctx_indir_get(port, rxfh->rss_context,
+ ethtool_rxfh_context_indir(ctx));
+ else
+ ret = mvpp22_port_rss_ctx_indir_set(port, rxfh->rss_context,
+ rxfh->indir);
+ return ret;
+}
+
+static int mvpp2_modify_rxfh_context(struct net_device *dev,
+ struct ethtool_rxfh_context *ctx,
+ const struct ethtool_rxfh_param *rxfh,
+ struct netlink_ext_ack *extack)
+{
+ struct mvpp2_port *port = netdev_priv(dev);
+ int ret = 0;
+
+ if (!mvpp2_ethtool_rxfh_okay(port, rxfh))
+ return -EOPNOTSUPP;
+
+ if (rxfh->indir)
+ ret = mvpp22_port_rss_ctx_indir_set(port, rxfh->rss_context,
+ rxfh->indir);
+ return ret;
+}
+
+static int mvpp2_remove_rxfh_context(struct net_device *dev,
+ struct ethtool_rxfh_context *ctx,
+ u32 rss_context,
+ struct netlink_ext_ack *extack)
+{
+ struct mvpp2_port *port = netdev_priv(dev);
+
+ return mvpp22_port_rss_ctx_delete(port, rss_context);
+}
+
static int mvpp2_ethtool_set_rxfh(struct net_device *dev,
struct ethtool_rxfh_param *rxfh,
struct netlink_ext_ack *extack)
{
- struct mvpp2_port *port = netdev_priv(dev);
- u32 *rss_context = &rxfh->rss_context;
- int ret = 0;
-
- if (!mvpp22_rss_is_supported(port))
- return -EOPNOTSUPP;
-
- if (rxfh->hfunc != ETH_RSS_HASH_NO_CHANGE &&
- rxfh->hfunc != ETH_RSS_HASH_CRC32)
- return -EOPNOTSUPP;
-
- if (rxfh->key)
- return -EOPNOTSUPP;
-
- if (*rss_context && rxfh->rss_delete)
- return mvpp22_port_rss_ctx_delete(port, *rss_context);
-
- if (*rss_context == ETH_RXFH_CONTEXT_ALLOC) {
- ret = mvpp22_port_rss_ctx_create(port, rss_context);
- if (ret)
- return ret;
- }
-
- if (rxfh->indir)
- ret = mvpp22_port_rss_ctx_indir_set(port, *rss_context,
- rxfh->indir);
-
- return ret;
+ return mvpp2_modify_rxfh_context(dev, NULL, rxfh, extack);
}
/* Device ops */
@@ -5750,6 +5792,7 @@ static const struct net_device_ops mvpp2_netdev_ops = {
static const struct ethtool_ops mvpp2_eth_tool_ops = {
.cap_rss_ctx_supported = true,
+ .rxfh_max_context_id = MVPP22_N_RSS_TABLES - 1,
.supported_coalesce_params = ETHTOOL_COALESCE_USECS |
ETHTOOL_COALESCE_MAX_FRAMES,
.nway_reset = mvpp2_ethtool_nway_reset,
@@ -5772,6 +5815,9 @@ static const struct ethtool_ops mvpp2_eth_tool_ops = {
.get_rxfh_indir_size = mvpp2_ethtool_get_rxfh_indir_size,
.get_rxfh = mvpp2_ethtool_get_rxfh,
.set_rxfh = mvpp2_ethtool_set_rxfh,
+ .create_rxfh_context = mvpp2_create_rxfh_context,
+ .modify_rxfh_context = mvpp2_modify_rxfh_context,
+ .remove_rxfh_context = mvpp2_remove_rxfh_context,
};
/* Used for PPv2.1, or PPv2.2 with the old Device Tree binding that
--
2.45.2
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