Skip to content
  1. Jan 06, 2022
  3. Jan 05, 2022
    • David S. Miller's avatar
      Merge branch 'dsa-notifier-cleanup' · c487b653
      David S. Miller authored 
      

Vladimir Oltean says:

====================
DSA cross-chip notifier cleanup

This series deletes the no-op cross-chip notifier support for MRP and
HSR, features which were introduced relatively recently and did not get
full review at the time. The new code is functionally equivalent, but
simpler.

Cc: Horatiu Vultur <horatiu.vultur@microchip.com>
Cc: George McCollister <george.mccollister@gmail.com>
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      c487b653
    • Vladimir Oltean's avatar
      net: dsa: remove cross-chip support for HSR · a68dc7b9
      Vladimir Oltean authored 
      

The cross-chip notifiers for HSR are bypass operations, meaning that
even though all switches in a tree are notified, only the switch
specified in the info structure is targeted.

We can eliminate the unnecessary complexity by deleting the cross-chip
notifier logic and calling the ds->ops straight from port.c.

Cc: George McCollister <george.mccollister@gmail.com>
Signed-off-by: default avatarVladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: default avatarGeorge McCollister <george.mccollister@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      a68dc7b9
    • Vladimir Oltean's avatar
      net: dsa: remove cross-chip support for MRP · cad69019
      Vladimir Oltean authored 
      

The cross-chip notifiers for MRP are bypass operations, meaning that
even though all switches in a tree are notified, only the switch
specified in the info structure is targeted.

We can eliminate the unnecessary complexity by deleting the cross-chip
notifier logic and calling the ds->ops straight from port.c.

Cc: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: default avatarVladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      cad69019
    • Vladimir Oltean's avatar
      net: dsa: fix incorrect function pointer check for MRP ring roles · ff91e1b6
      Vladimir Oltean authored 
      The cross-chip notifier boilerplate code meant to check the presence of
ds->ops->port_mrp_add_ring_role before calling it, but checked
ds->ops->port_mrp_add instead, before calling
ds->ops->port_mrp_add_ring_role.

Therefore, a driver which implements one operation but not the other
would trigger a NULL pointer dereference.

There isn't any such driver in DSA yet, so there is no reason to
backport the change. Issue found through code inspection.

Cc: Horatiu Vultur <horatiu.vultur@microchip.com>
Fixes: c595c433

 ("net: dsa: add MRP support")
Signed-off-by: default avatarVladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ff91e1b6
    • Danielle Ratson's avatar
      mlxsw: pci: Avoid flow control for EMAD packets · d43e4271
      Danielle Ratson authored 
      

Locally generated packets ingress the device through its CPU port. When
the CPU port is congested and there are not enough credits in its
headroom buffer, packets can be dropped.

While this might be acceptable for data packets that traverse the
network, configuration packets exchanged between the host and the device
(EMADs) should not be subjected to this flow control.

The "sdq_lp" bit in the SDQ (Send Descriptor Queue) context allows the
host to instruct the device to treat packets sent on this queue as
"local processing" and always process them, regardless of the state of
the CPU port's headroom.

Add the definition of this bit and set it for the dedicated SDQ reserved
for the transmission of EMAD packets. This makes the "local processing"
bit in the WQE (Work Queue Element) redundant, so clear it.

Signed-off-by: default avatarDanielle Ratson <danieller@nvidia.com>
Signed-off-by: default avatarIdo Schimmel <idosch@nvidia.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d43e4271
    • David S. Miller's avatar
      Merge tag 'linux-can-next-for-5.17-20220105' of... · 7da0694c
      David S. Miller authored 
      Merge tag 'linux-can-next-for-5.17-20220105' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next



Marc Kleine-Budde says:

====================
pull-request: can-next 2022-01-05

this is a pull request of 15 patches for net-next/master.

The first patch is by me and removed an unused variable from the
usb_8dev driver.

Andy Shevchenko contributes a patch for the mcp251x driver, which
removes an unneeded assignment.

Jimmy Assarsson's patch for the kvaser_usb makes use of units.h in the
assignment of frequencies.

Lad Prabhakar provides 2 patches, converting the ti_hecc and the
sja1000 driver to make use of platform_get_irq().

The 10 remaining patches are by Vincent Mailhol. First the etas_es58x
driver populates the net_device::dev_port. The next 5 patches cleanup
the handling of CAN error and CAN RTR messages of all drivers. The
remaining 4 patches enhance the CAN controller mode flag handling and
export it via netlink to user space.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      7da0694c
    • David S. Miller's avatar
      Merge branch 'dsa-cleanups' · 53928cdd
      David S. Miller authored 
      

Vladimir Oltean says:

====================
Cleanup to main DSA structures

This series contains changes that do the following:

- struct dsa_port reduced from 576 to 544 bytes, and first cache line a
  bit better organized
- struct dsa_switch from 160 to 136 bytes, and first cache line a bit
  better organized
- struct dsa_switch_tree from 112 to 104 bytes, and first cache line a
  bit better organized
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      53928cdd
    • Vladimir Oltean's avatar
      net: dsa: combine two holes in struct dsa_switch_tree · 4b026e82
      Vladimir Oltean authored 
      

There is a 7 byte hole after dst->setup and a 4 byte hole after
dst->default_proto. Combining them, we have a single hole of just 3
bytes on 64 bit machines.

Before:

pahole -C dsa_switch_tree net/dsa/slave.o
struct dsa_switch_tree {
        struct list_head           list;                 /*     0    16 */
        struct list_head           ports;                /*    16    16 */
        struct raw_notifier_head   nh;                   /*    32     8 */
        unsigned int               index;                /*    40     4 */
        struct kref                refcount;             /*    44     4 */
        struct net_device * *      lags;                 /*    48     8 */
        bool                       setup;                /*    56     1 */

        /* XXX 7 bytes hole, try to pack */

        /* --- cacheline 1 boundary (64 bytes) --- */
        const struct dsa_device_ops  * tag_ops;          /*    64     8 */
        enum dsa_tag_protocol      default_proto;        /*    72     4 */

        /* XXX 4 bytes hole, try to pack */

        struct dsa_platform_data * pd;                   /*    80     8 */
        struct list_head           rtable;               /*    88    16 */
        unsigned int               lags_len;             /*   104     4 */
        unsigned int               last_switch;          /*   108     4 */

        /* size: 112, cachelines: 2, members: 13 */
        /* sum members: 101, holes: 2, sum holes: 11 */
        /* last cacheline: 48 bytes */
};

After:

pahole -C dsa_switch_tree net/dsa/slave.o
struct dsa_switch_tree {
        struct list_head           list;                 /*     0    16 */
        struct list_head           ports;                /*    16    16 */
        struct raw_notifier_head   nh;                   /*    32     8 */
        unsigned int               index;                /*    40     4 */
        struct kref                refcount;             /*    44     4 */
        struct net_device * *      lags;                 /*    48     8 */
        const struct dsa_device_ops  * tag_ops;          /*    56     8 */
        /* --- cacheline 1 boundary (64 bytes) --- */
        enum dsa_tag_protocol      default_proto;        /*    64     4 */
        bool                       setup;                /*    68     1 */

        /* XXX 3 bytes hole, try to pack */

        struct dsa_platform_data * pd;                   /*    72     8 */
        struct list_head           rtable;               /*    80    16 */
        unsigned int               lags_len;             /*    96     4 */
        unsigned int               last_switch;          /*   100     4 */

        /* size: 104, cachelines: 2, members: 13 */
        /* sum members: 101, holes: 1, sum holes: 3 */
        /* last cacheline: 40 bytes */
};

Signed-off-by: default avatarVladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      4b026e82
    • Vladimir Oltean's avatar
      net: dsa: move dsa_switch_tree :: ports and lags to first cache line · b035c88c
      Vladimir Oltean authored 
      

dst->ports is accessed most notably by dsa_master_find_slave(), which is
invoked in the RX path.

dst->lags is accessed by dsa_lag_dev(), which is invoked in the RX path
of tag_dsa.c.

dst->tag_ops, dst->default_proto and dst->pd don't need to be in the
first cache line, so they are moved out by this change.

Before:

pahole -C dsa_switch_tree net/dsa/slave.o
struct dsa_switch_tree {
        struct list_head           list;                 /*     0    16 */
        struct raw_notifier_head   nh;                   /*    16     8 */
        unsigned int               index;                /*    24     4 */
        struct kref                refcount;             /*    28     4 */
        bool                       setup;                /*    32     1 */

        /* XXX 7 bytes hole, try to pack */

        const struct dsa_device_ops  * tag_ops;          /*    40     8 */
        enum dsa_tag_protocol      default_proto;        /*    48     4 */

        /* XXX 4 bytes hole, try to pack */

        struct dsa_platform_data * pd;                   /*    56     8 */
        /* --- cacheline 1 boundary (64 bytes) --- */
        struct list_head           ports;                /*    64    16 */
        struct list_head           rtable;               /*    80    16 */
        struct net_device * *      lags;                 /*    96     8 */
        unsigned int               lags_len;             /*   104     4 */
        unsigned int               last_switch;          /*   108     4 */

        /* size: 112, cachelines: 2, members: 13 */
        /* sum members: 101, holes: 2, sum holes: 11 */
        /* last cacheline: 48 bytes */
};

After:

pahole -C dsa_switch_tree net/dsa/slave.o
struct dsa_switch_tree {
        struct list_head           list;                 /*     0    16 */
        struct list_head           ports;                /*    16    16 */
        struct raw_notifier_head   nh;                   /*    32     8 */
        unsigned int               index;                /*    40     4 */
        struct kref                refcount;             /*    44     4 */
        struct net_device * *      lags;                 /*    48     8 */
        bool                       setup;                /*    56     1 */

        /* XXX 7 bytes hole, try to pack */

        /* --- cacheline 1 boundary (64 bytes) --- */
        const struct dsa_device_ops  * tag_ops;          /*    64     8 */
        enum dsa_tag_protocol      default_proto;        /*    72     4 */

        /* XXX 4 bytes hole, try to pack */

        struct dsa_platform_data * pd;                   /*    80     8 */
        struct list_head           rtable;               /*    88    16 */
        unsigned int               lags_len;             /*   104     4 */
        unsigned int               last_switch;          /*   108     4 */

        /* size: 112, cachelines: 2, members: 13 */
        /* sum members: 101, holes: 2, sum holes: 11 */
        /* last cacheline: 48 bytes */
};

Signed-off-by: default avatarVladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b035c88c
    • Vladimir Oltean's avatar
      net: dsa: make dsa_switch :: num_ports an unsigned int · 258030ac
      Vladimir Oltean authored 
      

Currently, num_ports is declared as size_t, which is defined as
__kernel_ulong_t, therefore it occupies 8 bytes of memory.

Even switches with port numbers in the range of tens are exotic, so
there is no need for this amount of storage.

Additionally, because the max_num_bridges member right above it is also
4 bytes, it means the compiler needs to add padding between the last 2
fields. By reducing the size, we don't need that padding and can reduce
the struct size.

Before:

pahole -C dsa_switch net/dsa/slave.o
struct dsa_switch {
        struct device *            dev;                  /*     0     8 */
        struct dsa_switch_tree *   dst;                  /*     8     8 */
        unsigned int               index;                /*    16     4 */
        u32                        setup:1;              /*    20: 0  4 */
        u32                        vlan_filtering_is_global:1; /*    20: 1  4 */
        u32                        needs_standalone_vlan_filtering:1; /*    20: 2  4 */
        u32                        configure_vlan_while_not_filtering:1; /*    20: 3  4 */
        u32                        untag_bridge_pvid:1;  /*    20: 4  4 */
        u32                        assisted_learning_on_cpu_port:1; /*    20: 5  4 */
        u32                        vlan_filtering:1;     /*    20: 6  4 */
        u32                        pcs_poll:1;           /*    20: 7  4 */
        u32                        mtu_enforcement_ingress:1; /*    20: 8  4 */

        /* XXX 23 bits hole, try to pack */

        struct notifier_block      nb;                   /*    24    24 */

        /* XXX last struct has 4 bytes of padding */

        void *                     priv;                 /*    48     8 */
        void *                     tagger_data;          /*    56     8 */
        /* --- cacheline 1 boundary (64 bytes) --- */
        struct dsa_chip_data *     cd;                   /*    64     8 */
        const struct dsa_switch_ops  * ops;              /*    72     8 */
        u32                        phys_mii_mask;        /*    80     4 */

        /* XXX 4 bytes hole, try to pack */

        struct mii_bus *           slave_mii_bus;        /*    88     8 */
        unsigned int               ageing_time_min;      /*    96     4 */
        unsigned int               ageing_time_max;      /*   100     4 */
        struct dsa_8021q_context * tag_8021q_ctx;        /*   104     8 */
        struct devlink *           devlink;              /*   112     8 */
        unsigned int               num_tx_queues;        /*   120     4 */
        unsigned int               num_lag_ids;          /*   124     4 */
        /* --- cacheline 2 boundary (128 bytes) --- */
        unsigned int               max_num_bridges;      /*   128     4 */

        /* XXX 4 bytes hole, try to pack */

        size_t                     num_ports;            /*   136     8 */

        /* size: 144, cachelines: 3, members: 27 */
        /* sum members: 132, holes: 2, sum holes: 8 */
        /* sum bitfield members: 9 bits, bit holes: 1, sum bit holes: 23 bits */
        /* paddings: 1, sum paddings: 4 */
        /* last cacheline: 16 bytes */
};

After:

pahole -C dsa_switch net/dsa/slave.o
struct dsa_switch {
        struct device *            dev;                  /*     0     8 */
        struct dsa_switch_tree *   dst;                  /*     8     8 */
        unsigned int               index;                /*    16     4 */
        u32                        setup:1;              /*    20: 0  4 */
        u32                        vlan_filtering_is_global:1; /*    20: 1  4 */
        u32                        needs_standalone_vlan_filtering:1; /*    20: 2  4 */
        u32                        configure_vlan_while_not_filtering:1; /*    20: 3  4 */
        u32                        untag_bridge_pvid:1;  /*    20: 4  4 */
        u32                        assisted_learning_on_cpu_port:1; /*    20: 5  4 */
        u32                        vlan_filtering:1;     /*    20: 6  4 */
        u32                        pcs_poll:1;           /*    20: 7  4 */
        u32                        mtu_enforcement_ingress:1; /*    20: 8  4 */

        /* XXX 23 bits hole, try to pack */

        struct notifier_block      nb;                   /*    24    24 */

        /* XXX last struct has 4 bytes of padding */

        void *                     priv;                 /*    48     8 */
        void *                     tagger_data;          /*    56     8 */
        /* --- cacheline 1 boundary (64 bytes) --- */
        struct dsa_chip_data *     cd;                   /*    64     8 */
        const struct dsa_switch_ops  * ops;              /*    72     8 */
        u32                        phys_mii_mask;        /*    80     4 */

        /* XXX 4 bytes hole, try to pack */

        struct mii_bus *           slave_mii_bus;        /*    88     8 */
        unsigned int               ageing_time_min;      /*    96     4 */
        unsigned int               ageing_time_max;      /*   100     4 */
        struct dsa_8021q_context * tag_8021q_ctx;        /*   104     8 */
        struct devlink *           devlink;              /*   112     8 */
        unsigned int               num_tx_queues;        /*   120     4 */
        unsigned int               num_lag_ids;          /*   124     4 */
        /* --- cacheline 2 boundary (128 bytes) --- */
        unsigned int               max_num_bridges;      /*   128     4 */
        unsigned int               num_ports;            /*   132     4 */

        /* size: 136, cachelines: 3, members: 27 */
        /* sum members: 128, holes: 1, sum holes: 4 */
        /* sum bitfield members: 9 bits, bit holes: 1, sum bit holes: 23 bits */
        /* paddings: 1, sum paddings: 4 */
        /* last cacheline: 8 bytes */
};

Signed-off-by: default avatarVladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      258030ac
    • Vladimir Oltean's avatar
      net: dsa: merge all bools of struct dsa_switch into a single u32 · 7787ff77
      Vladimir Oltean authored 
      

struct dsa_switch has 9 boolean properties, many of which are in fact
set by drivers for custom behavior (vlan_filtering_is_global,
needs_standalone_vlan_filtering, etc etc). The binary layout of the
structure could be improved. For example, the "bool setup" at the
beginning introduces a gratuitous 7 byte hole in the first cache line.

The change merges all boolean properties into bitfields of an u32, and
places that u32 in the first cache line of the structure, since many
bools are accessed from the data path (untag_bridge_pvid, vlan_filtering,
vlan_filtering_is_global).

We place this u32 after the existing ds->index, which is also 4 bytes in
size. As a positive side effect, ds->tagger_data now fits into the first
cache line too, because 4 bytes are saved.

Before:

pahole -C dsa_switch net/dsa/slave.o
struct dsa_switch {
        bool                       setup;                /*     0     1 */

        /* XXX 7 bytes hole, try to pack */

        struct device *            dev;                  /*     8     8 */
        struct dsa_switch_tree *   dst;                  /*    16     8 */
        unsigned int               index;                /*    24     4 */

        /* XXX 4 bytes hole, try to pack */

        struct notifier_block      nb;                   /*    32    24 */

        /* XXX last struct has 4 bytes of padding */

        void *                     priv;                 /*    56     8 */
        /* --- cacheline 1 boundary (64 bytes) --- */
        void *                     tagger_data;          /*    64     8 */
        struct dsa_chip_data *     cd;                   /*    72     8 */
        const struct dsa_switch_ops  * ops;              /*    80     8 */
        u32                        phys_mii_mask;        /*    88     4 */

        /* XXX 4 bytes hole, try to pack */

        struct mii_bus *           slave_mii_bus;        /*    96     8 */
        unsigned int               ageing_time_min;      /*   104     4 */
        unsigned int               ageing_time_max;      /*   108     4 */
        struct dsa_8021q_context * tag_8021q_ctx;        /*   112     8 */
        struct devlink *           devlink;              /*   120     8 */
        /* --- cacheline 2 boundary (128 bytes) --- */
        unsigned int               num_tx_queues;        /*   128     4 */
        bool                       vlan_filtering_is_global; /*   132     1 */
        bool                       needs_standalone_vlan_filtering; /*   133     1 */
        bool                       configure_vlan_while_not_filtering; /*   134     1 */
        bool                       untag_bridge_pvid;    /*   135     1 */
        bool                       assisted_learning_on_cpu_port; /*   136     1 */
        bool                       vlan_filtering;       /*   137     1 */
        bool                       pcs_poll;             /*   138     1 */
        bool                       mtu_enforcement_ingress; /*   139     1 */
        unsigned int               num_lag_ids;          /*   140     4 */
        unsigned int               max_num_bridges;      /*   144     4 */

        /* XXX 4 bytes hole, try to pack */

        size_t                     num_ports;            /*   152     8 */

        /* size: 160, cachelines: 3, members: 27 */
        /* sum members: 141, holes: 4, sum holes: 19 */
        /* paddings: 1, sum paddings: 4 */
        /* last cacheline: 32 bytes */
};

After:

pahole -C dsa_switch net/dsa/slave.o
struct dsa_switch {
        struct device *            dev;                  /*     0     8 */
        struct dsa_switch_tree *   dst;                  /*     8     8 */
        unsigned int               index;                /*    16     4 */
        u32                        setup:1;              /*    20: 0  4 */
        u32                        vlan_filtering_is_global:1; /*    20: 1  4 */
        u32                        needs_standalone_vlan_filtering:1; /*    20: 2  4 */
        u32                        configure_vlan_while_not_filtering:1; /*    20: 3  4 */
        u32                        untag_bridge_pvid:1;  /*    20: 4  4 */
        u32                        assisted_learning_on_cpu_port:1; /*    20: 5  4 */
        u32                        vlan_filtering:1;     /*    20: 6  4 */
        u32                        pcs_poll:1;           /*    20: 7  4 */
        u32                        mtu_enforcement_ingress:1; /*    20: 8  4 */

        /* XXX 23 bits hole, try to pack */

        struct notifier_block      nb;                   /*    24    24 */

        /* XXX last struct has 4 bytes of padding */

        void *                     priv;                 /*    48     8 */
        void *                     tagger_data;          /*    56     8 */
        /* --- cacheline 1 boundary (64 bytes) --- */
        struct dsa_chip_data *     cd;                   /*    64     8 */
        const struct dsa_switch_ops  * ops;              /*    72     8 */
        u32                        phys_mii_mask;        /*    80     4 */

        /* XXX 4 bytes hole, try to pack */

        struct mii_bus *           slave_mii_bus;        /*    88     8 */
        unsigned int               ageing_time_min;      /*    96     4 */
        unsigned int               ageing_time_max;      /*   100     4 */
        struct dsa_8021q_context * tag_8021q_ctx;        /*   104     8 */
        struct devlink *           devlink;              /*   112     8 */
        unsigned int               num_tx_queues;        /*   120     4 */
        unsigned int               num_lag_ids;          /*   124     4 */
        /* --- cacheline 2 boundary (128 bytes) --- */
        unsigned int               max_num_bridges;      /*   128     4 */

        /* XXX 4 bytes hole, try to pack */

        size_t                     num_ports;            /*   136     8 */

        /* size: 144, cachelines: 3, members: 27 */
        /* sum members: 132, holes: 2, sum holes: 8 */
        /* sum bitfield members: 9 bits, bit holes: 1, sum bit holes: 23 bits */
        /* paddings: 1, sum paddings: 4 */
        /* last cacheline: 16 bytes */
};

Signed-off-by: default avatarVladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      7787ff77
    • Vladimir Oltean's avatar
      net: dsa: move dsa_port :: type near dsa_port :: index · 06251258
      Vladimir Oltean authored 
      

Both dsa_port :: type and dsa_port :: index introduce a 4 octet hole
after them, so we can group them together and the holes would be
eliminated, turning 16 octets of storage into just 8. This makes the
cpu_dp pointer fit in the first cache line, which is good, because
dsa_slave_to_master(), called by dsa_enqueue_skb(), uses it.

Before:

pahole -C dsa_port net/dsa/slave.o
struct dsa_port {
        union {
                struct net_device * master;              /*     0     8 */
                struct net_device * slave;               /*     0     8 */
        };                                               /*     0     8 */
        const struct dsa_device_ops  * tag_ops;          /*     8     8 */
        struct dsa_switch_tree *   dst;                  /*    16     8 */
        struct sk_buff *           (*rcv)(struct sk_buff *, struct net_device *); /*    24     8 */
        enum {
                DSA_PORT_TYPE_UNUSED = 0,
                DSA_PORT_TYPE_CPU    = 1,
                DSA_PORT_TYPE_DSA    = 2,
                DSA_PORT_TYPE_USER   = 3,
        } type;                                          /*    32     4 */

        /* XXX 4 bytes hole, try to pack */

        struct dsa_switch *        ds;                   /*    40     8 */
        unsigned int               index;                /*    48     4 */

        /* XXX 4 bytes hole, try to pack */

        const char  *              name;                 /*    56     8 */
        /* --- cacheline 1 boundary (64 bytes) --- */
        struct dsa_port *          cpu_dp;               /*    64     8 */
        u8                         mac[6];               /*    72     6 */
        u8                         stp_state;            /*    78     1 */
        u8                         vlan_filtering:1;     /*    79: 0  1 */
        u8                         learning:1;           /*    79: 1  1 */
        u8                         lag_tx_enabled:1;     /*    79: 2  1 */
        u8                         devlink_port_setup:1; /*    79: 3  1 */
        u8                         setup:1;              /*    79: 4  1 */

        /* XXX 3 bits hole, try to pack */

        struct device_node *       dn;                   /*    80     8 */
        unsigned int               ageing_time;          /*    88     4 */

        /* XXX 4 bytes hole, try to pack */

        struct dsa_bridge *        bridge;               /*    96     8 */
        struct devlink_port        devlink_port;         /*   104   288 */
        /* --- cacheline 6 boundary (384 bytes) was 8 bytes ago --- */
        struct phylink *           pl;                   /*   392     8 */
        struct phylink_config      pl_config;            /*   400    40 */
        struct net_device *        lag_dev;              /*   440     8 */
        /* --- cacheline 7 boundary (448 bytes) --- */
        struct net_device *        hsr_dev;              /*   448     8 */
        struct list_head           list;                 /*   456    16 */
        const struct ethtool_ops  * orig_ethtool_ops;    /*   472     8 */
        const struct dsa_netdevice_ops  * netdev_ops;    /*   480     8 */
        struct mutex               addr_lists_lock;      /*   488    32 */
        /* --- cacheline 8 boundary (512 bytes) was 8 bytes ago --- */
        struct list_head           fdbs;                 /*   520    16 */
        struct list_head           mdbs;                 /*   536    16 */

        /* size: 552, cachelines: 9, members: 30 */
        /* sum members: 539, holes: 3, sum holes: 12 */
        /* sum bitfield members: 5 bits, bit holes: 1, sum bit holes: 3 bits */
        /* last cacheline: 40 bytes */
};

After:

pahole -C dsa_port net/dsa/slave.o
struct dsa_port {
        union {
                struct net_device * master;              /*     0     8 */
                struct net_device * slave;               /*     0     8 */
        };                                               /*     0     8 */
        const struct dsa_device_ops  * tag_ops;          /*     8     8 */
        struct dsa_switch_tree *   dst;                  /*    16     8 */
        struct sk_buff *           (*rcv)(struct sk_buff *, struct net_device *); /*    24     8 */
        struct dsa_switch *        ds;                   /*    32     8 */
        unsigned int               index;                /*    40     4 */
        enum {
                DSA_PORT_TYPE_UNUSED = 0,
                DSA_PORT_TYPE_CPU    = 1,
                DSA_PORT_TYPE_DSA    = 2,
                DSA_PORT_TYPE_USER   = 3,
        } type;                                          /*    44     4 */
        const char  *              name;                 /*    48     8 */
        struct dsa_port *          cpu_dp;               /*    56     8 */
        /* --- cacheline 1 boundary (64 bytes) --- */
        u8                         mac[6];               /*    64     6 */
        u8                         stp_state;            /*    70     1 */
        u8                         vlan_filtering:1;     /*    71: 0  1 */
        u8                         learning:1;           /*    71: 1  1 */
        u8                         lag_tx_enabled:1;     /*    71: 2  1 */
        u8                         devlink_port_setup:1; /*    71: 3  1 */
        u8                         setup:1;              /*    71: 4  1 */

        /* XXX 3 bits hole, try to pack */

        struct device_node *       dn;                   /*    72     8 */
        unsigned int               ageing_time;          /*    80     4 */

        /* XXX 4 bytes hole, try to pack */

        struct dsa_bridge *        bridge;               /*    88     8 */
        struct devlink_port        devlink_port;         /*    96   288 */
        /* --- cacheline 6 boundary (384 bytes) --- */
        struct phylink *           pl;                   /*   384     8 */
        struct phylink_config      pl_config;            /*   392    40 */
        struct net_device *        lag_dev;              /*   432     8 */
        struct net_device *        hsr_dev;              /*   440     8 */
        /* --- cacheline 7 boundary (448 bytes) --- */
        struct list_head           list;                 /*   448    16 */
        const struct ethtool_ops  * orig_ethtool_ops;    /*   464     8 */
        const struct dsa_netdevice_ops  * netdev_ops;    /*   472     8 */
        struct mutex               addr_lists_lock;      /*   480    32 */
        /* --- cacheline 8 boundary (512 bytes) --- */
        struct list_head           fdbs;                 /*   512    16 */
        struct list_head           mdbs;                 /*   528    16 */

        /* size: 544, cachelines: 9, members: 30 */
        /* sum members: 539, holes: 1, sum holes: 4 */
        /* sum bitfield members: 5 bits, bit holes: 1, sum bit holes: 3 bits */
        /* last cacheline: 32 bytes */
};

Signed-off-by: default avatarVladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      06251258
    • Vladimir Oltean's avatar
      net: dsa: merge all bools of struct dsa_port into a single u8 · bde82f38
      Vladimir Oltean authored 
      

struct dsa_port has 5 bool members which create quite a number of 7 byte
holes in the structure layout. By merging them all into bitfields of an
u8, and placing that u8 in the 1-byte hole after dp->mac and dp->stp_state,
we can reduce the structure size from 576 bytes to 552 bytes on arm64.

Before:

pahole -C dsa_port net/dsa/slave.o
struct dsa_port {
        union {
                struct net_device * master;              /*     0     8 */
                struct net_device * slave;               /*     0     8 */
        };                                               /*     0     8 */
        const struct dsa_device_ops  * tag_ops;          /*     8     8 */
        struct dsa_switch_tree *   dst;                  /*    16     8 */
        struct sk_buff *           (*rcv)(struct sk_buff *, struct net_device *); /*    24     8 */
        enum {
                DSA_PORT_TYPE_UNUSED = 0,
                DSA_PORT_TYPE_CPU    = 1,
                DSA_PORT_TYPE_DSA    = 2,
                DSA_PORT_TYPE_USER   = 3,
        } type;                                          /*    32     4 */

        /* XXX 4 bytes hole, try to pack */

        struct dsa_switch *        ds;                   /*    40     8 */
        unsigned int               index;                /*    48     4 */

        /* XXX 4 bytes hole, try to pack */

        const char  *              name;                 /*    56     8 */
        /* --- cacheline 1 boundary (64 bytes) --- */
        struct dsa_port *          cpu_dp;               /*    64     8 */
        u8                         mac[6];               /*    72     6 */
        u8                         stp_state;            /*    78     1 */

        /* XXX 1 byte hole, try to pack */

        struct device_node *       dn;                   /*    80     8 */
        unsigned int               ageing_time;          /*    88     4 */
        bool                       vlan_filtering;       /*    92     1 */
        bool                       learning;             /*    93     1 */

        /* XXX 2 bytes hole, try to pack */

        struct dsa_bridge *        bridge;               /*    96     8 */
        struct devlink_port        devlink_port;         /*   104   288 */
        /* --- cacheline 6 boundary (384 bytes) was 8 bytes ago --- */
        bool                       devlink_port_setup;   /*   392     1 */

        /* XXX 7 bytes hole, try to pack */

        struct phylink *           pl;                   /*   400     8 */
        struct phylink_config      pl_config;            /*   408    40 */
        /* --- cacheline 7 boundary (448 bytes) --- */
        struct net_device *        lag_dev;              /*   448     8 */
        bool                       lag_tx_enabled;       /*   456     1 */

        /* XXX 7 bytes hole, try to pack */

        struct net_device *        hsr_dev;              /*   464     8 */
        struct list_head           list;                 /*   472    16 */
        const struct ethtool_ops  * orig_ethtool_ops;    /*   488     8 */
        const struct dsa_netdevice_ops  * netdev_ops;    /*   496     8 */
        struct mutex               addr_lists_lock;      /*   504    32 */
        /* --- cacheline 8 boundary (512 bytes) was 24 bytes ago --- */
        struct list_head           fdbs;                 /*   536    16 */
        struct list_head           mdbs;                 /*   552    16 */
        bool                       setup;                /*   568     1 */

        /* size: 576, cachelines: 9, members: 30 */
        /* sum members: 544, holes: 6, sum holes: 25 */
        /* padding: 7 */
};

After:

pahole -C dsa_port net/dsa/slave.o
struct dsa_port {
        union {
                struct net_device * master;              /*     0     8 */
                struct net_device * slave;               /*     0     8 */
        };                                               /*     0     8 */
        const struct dsa_device_ops  * tag_ops;          /*     8     8 */
        struct dsa_switch_tree *   dst;                  /*    16     8 */
        struct sk_buff *           (*rcv)(struct sk_buff *, struct net_device *); /*    24     8 */
        enum {
                DSA_PORT_TYPE_UNUSED = 0,
                DSA_PORT_TYPE_CPU    = 1,
                DSA_PORT_TYPE_DSA    = 2,
                DSA_PORT_TYPE_USER   = 3,
        } type;                                          /*    32     4 */

        /* XXX 4 bytes hole, try to pack */

        struct dsa_switch *        ds;                   /*    40     8 */
        unsigned int               index;                /*    48     4 */

        /* XXX 4 bytes hole, try to pack */

        const char  *              name;                 /*    56     8 */
        /* --- cacheline 1 boundary (64 bytes) --- */
        struct dsa_port *          cpu_dp;               /*    64     8 */
        u8                         mac[6];               /*    72     6 */
        u8                         stp_state;            /*    78     1 */
        u8                         vlan_filtering:1;     /*    79: 0  1 */
        u8                         learning:1;           /*    79: 1  1 */
        u8                         lag_tx_enabled:1;     /*    79: 2  1 */
        u8                         devlink_port_setup:1; /*    79: 3  1 */
        u8                         setup:1;              /*    79: 4  1 */

        /* XXX 3 bits hole, try to pack */

        struct device_node *       dn;                   /*    80     8 */
        unsigned int               ageing_time;          /*    88     4 */

        /* XXX 4 bytes hole, try to pack */

        struct dsa_bridge *        bridge;               /*    96     8 */
        struct devlink_port        devlink_port;         /*   104   288 */
        /* --- cacheline 6 boundary (384 bytes) was 8 bytes ago --- */
        struct phylink *           pl;                   /*   392     8 */
        struct phylink_config      pl_config;            /*   400    40 */
        struct net_device *        lag_dev;              /*   440     8 */
        /* --- cacheline 7 boundary (448 bytes) --- */
        struct net_device *        hsr_dev;              /*   448     8 */
        struct list_head           list;                 /*   456    16 */
        const struct ethtool_ops  * orig_ethtool_ops;    /*   472     8 */
        const struct dsa_netdevice_ops  * netdev_ops;    /*   480     8 */
        struct mutex               addr_lists_lock;      /*   488    32 */
        /* --- cacheline 8 boundary (512 bytes) was 8 bytes ago --- */
        struct list_head           fdbs;                 /*   520    16 */
        struct list_head           mdbs;                 /*   536    16 */

        /* size: 552, cachelines: 9, members: 30 */
        /* sum members: 539, holes: 3, sum holes: 12 */
        /* sum bitfield members: 5 bits, bit holes: 1, sum bit holes: 3 bits */
        /* last cacheline: 40 bytes */
};

Signed-off-by: default avatarVladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      bde82f38
    • Vladimir Oltean's avatar
      net: dsa: move dsa_port :: stp_state near dsa_port :: mac · b08db33d
      Vladimir Oltean authored 
      

The MAC address of a port is 6 octets in size, and this creates a 2
octet hole after it. There are some other u8 members of struct dsa_port
that we can put in that hole. One such member is the stp_state.

Before:

pahole -C dsa_port net/dsa/slave.o
struct dsa_port {
        union {
                struct net_device * master;              /*     0     8 */
                struct net_device * slave;               /*     0     8 */
        };                                               /*     0     8 */
        const struct dsa_device_ops  * tag_ops;          /*     8     8 */
        struct dsa_switch_tree *   dst;                  /*    16     8 */
        struct sk_buff *           (*rcv)(struct sk_buff *, struct net_device *); /*    24     8 */
        enum {
                DSA_PORT_TYPE_UNUSED = 0,
                DSA_PORT_TYPE_CPU    = 1,
                DSA_PORT_TYPE_DSA    = 2,
                DSA_PORT_TYPE_USER   = 3,
        } type;                                          /*    32     4 */

        /* XXX 4 bytes hole, try to pack */

        struct dsa_switch *        ds;                   /*    40     8 */
        unsigned int               index;                /*    48     4 */

        /* XXX 4 bytes hole, try to pack */

        const char  *              name;                 /*    56     8 */
        /* --- cacheline 1 boundary (64 bytes) --- */
        struct dsa_port *          cpu_dp;               /*    64     8 */
        u8                         mac[6];               /*    72     6 */

        /* XXX 2 bytes hole, try to pack */

        struct device_node *       dn;                   /*    80     8 */
        unsigned int               ageing_time;          /*    88     4 */
        bool                       vlan_filtering;       /*    92     1 */
        bool                       learning;             /*    93     1 */
        u8                         stp_state;            /*    94     1 */

        /* XXX 1 byte hole, try to pack */

        struct dsa_bridge *        bridge;               /*    96     8 */
        struct devlink_port        devlink_port;         /*   104   288 */
        /* --- cacheline 6 boundary (384 bytes) was 8 bytes ago --- */
        bool                       devlink_port_setup;   /*   392     1 */

        /* XXX 7 bytes hole, try to pack */

        struct phylink *           pl;                   /*   400     8 */
        struct phylink_config      pl_config;            /*   408    40 */
        /* --- cacheline 7 boundary (448 bytes) --- */
        struct net_device *        lag_dev;              /*   448     8 */
        bool                       lag_tx_enabled;       /*   456     1 */

        /* XXX 7 bytes hole, try to pack */

        struct net_device *        hsr_dev;              /*   464     8 */
        struct list_head           list;                 /*   472    16 */
        const struct ethtool_ops  * orig_ethtool_ops;    /*   488     8 */
        const struct dsa_netdevice_ops  * netdev_ops;    /*   496     8 */
        struct mutex               addr_lists_lock;      /*   504    32 */
        /* --- cacheline 8 boundary (512 bytes) was 24 bytes ago --- */
        struct list_head           fdbs;                 /*   536    16 */
        struct list_head           mdbs;                 /*   552    16 */
        bool                       setup;                /*   568     1 */

        /* size: 576, cachelines: 9, members: 30 */
        /* sum members: 544, holes: 6, sum holes: 25 */
        /* padding: 7 */
};

After:

pahole -C dsa_port net/dsa/slave.o
struct dsa_port {
        union {
                struct net_device * master;              /*     0     8 */
                struct net_device * slave;               /*     0     8 */
        };                                               /*     0     8 */
        const struct dsa_device_ops  * tag_ops;          /*     8     8 */
        struct dsa_switch_tree *   dst;                  /*    16     8 */
        struct sk_buff *           (*rcv)(struct sk_buff *, struct net_device *); /*    24     8 */
        enum {
                DSA_PORT_TYPE_UNUSED = 0,
                DSA_PORT_TYPE_CPU    = 1,
                DSA_PORT_TYPE_DSA    = 2,
                DSA_PORT_TYPE_USER   = 3,
        } type;                                          /*    32     4 */

        /* XXX 4 bytes hole, try to pack */

        struct dsa_switch *        ds;                   /*    40     8 */
        unsigned int               index;                /*    48     4 */

        /* XXX 4 bytes hole, try to pack */

        const char  *              name;                 /*    56     8 */
        /* --- cacheline 1 boundary (64 bytes) --- */
        struct dsa_port *          cpu_dp;               /*    64     8 */
        u8                         mac[6];               /*    72     6 */
        u8                         stp_state;            /*    78     1 */

        /* XXX 1 byte hole, try to pack */

        struct device_node *       dn;                   /*    80     8 */
        unsigned int               ageing_time;          /*    88     4 */
        bool                       vlan_filtering;       /*    92     1 */
        bool                       learning;             /*    93     1 */

        /* XXX 2 bytes hole, try to pack */

        struct dsa_bridge *        bridge;               /*    96     8 */
        struct devlink_port        devlink_port;         /*   104   288 */
        /* --- cacheline 6 boundary (384 bytes) was 8 bytes ago --- */
        bool                       devlink_port_setup;   /*   392     1 */

        /* XXX 7 bytes hole, try to pack */

        struct phylink *           pl;                   /*   400     8 */
        struct phylink_config      pl_config;            /*   408    40 */
        /* --- cacheline 7 boundary (448 bytes) --- */
        struct net_device *        lag_dev;              /*   448     8 */
        bool                       lag_tx_enabled;       /*   456     1 */

        /* XXX 7 bytes hole, try to pack */

        struct net_device *        hsr_dev;              /*   464     8 */
        struct list_head           list;                 /*   472    16 */
        const struct ethtool_ops  * orig_ethtool_ops;    /*   488     8 */
        const struct dsa_netdevice_ops  * netdev_ops;    /*   496     8 */
        struct mutex               addr_lists_lock;      /*   504    32 */
        /* --- cacheline 8 boundary (512 bytes) was 24 bytes ago --- */
        struct list_head           fdbs;                 /*   536    16 */
        struct list_head           mdbs;                 /*   552    16 */
        bool                       setup;                /*   568     1 */

        /* size: 576, cachelines: 9, members: 30 */
        /* sum members: 544, holes: 6, sum holes: 25 */
        /* padding: 7 */
};

Signed-off-by: default avatarVladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b08db33d
    • David S. Miller's avatar
      Merge branch 'hns3-stats-refactor' · 5be9963d
      David S. Miller authored 
      

Jie Wang says:

====================
net: hns3: refactor rss/tqp stats functions

Currently, hns3 PF and VF module have two sets of rss and tqp stats APIs
to provide get and set functions. Most of these APIs are the same. There is
no need to keep these two sets of same functions for double development and
bugfix work.

This series refactor the rss and tqp stats APIs in hns3 PF and VF by
implementing one set of common APIs for PF and VF reuse and deleting the
old APIs.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      5be9963d
    • Jie Wang's avatar
      net: hns3: create new common cmd code for PF and VF modules · 43710bfe
      Jie Wang authored 
      

Currently PF and VF use two sets of command code for modules to interact
with firmware. These codes values are same espect the macro names. It is
redundent to keep two sets of command code for same functions between PF
and VF.

So this patch firstly creates a unified command code for PF and VF module.
We keep the macro name same with the PF command code name to avoid too many
meaningless modifications. Secondly the new common command codes are used
to replace the old ones in VF and deletes the old ones.

Signed-off-by: default avatarJie Wang <wangjie125@huawei.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      43710bfe
    • Jie Wang's avatar
      net: hns3: refactor VF tqp stats APIs with new common tqp stats APIs · 4afc310c
      Jie Wang authored 
      

This patch firstly uses new tqp struct(hclge_comm_tqp) and removes the
old VF tqp struct(hclgevf_tqp). All the tqp stats members used in VF module
are modified according to the new hclge_comm_tqp.

Secondly VF tqp stats APIs are refactored to use new common tqp stats APIs.
The old tqp stats APIs in VF are deleted.

Signed-off-by: default avatarJie Wang <wangjie125@huawei.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      4afc310c
    • Jie Wang's avatar
      net: hns3: refactor PF tqp stats APIs with new common tqp stats APIs · add7645c
      Jie Wang authored 
      

This patch firstly uses new tqp struct(hclge_comm_tqp) and deletes the
old PF tqp struct(hclge_tqp). All the tqp stats members used in PF module
are modified according to the new hclge_comm_tqp.

Secondly PF tqp stats APIs are refactored to use new common tqp stats APIs.
The old tqp stats APIs in PF are deleted.

Signed-off-by: default avatarJie Wang <wangjie125@huawei.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      add7645c
    • Jie Wang's avatar
      net: hns3: create new set of common tqp stats APIs for PF and VF reuse · 287db5c4
      Jie Wang authored 
      

This patch creates new set of common tqp stats structures and APIs for PF
and VF tqp stats module. Subfunctions such as get tqp stats, update tqp
stats and reset tqp stats are inclued in this patch.

These new common tqp stats APIs will be used to replace the old PF and VF
tqp stats APIs in next patches.

Signed-off-by: default avatarJie Wang <wangjie125@huawei.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      287db5c4
    • Jie Wang's avatar
      net: hns3: refactor VF rss init APIs with new common rss init APIs · 93969dc1
      Jie Wang authored 
      

This patch uses common rss init APIs to replace the old APIs in VF rss
module and removes the old VF rss init APIs. Several related Subfunctions
and macros are also modified in this patch.

Signed-off-by: default avatarJie Wang <wangjie125@huawei.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      93969dc1
    • Jie Wang's avatar
      net: hns3: refactor PF rss init APIs with new common rss init APIs · 07dce03c
      Jie Wang authored 
      

This patch uses common rss init APIs to replace the old APIs in PF rss
module and deletes the old PF rss init APIs. Some related subfunctions and
macros are also modified in this patch.

Signed-off-by: default avatarJie Wang <wangjie125@huawei.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      07dce03c
    • Jie Wang's avatar
      net: hns3: create new set of common rss init APIs for PF and VF reuse · 2c0d3f4c
      Jie Wang authored 
      

This patch creates new set of common rss init APIs for PF and VF rss
module. Subfunctions called by rss init process are also created include
rss tuple configuration and rss indirect table configuration.

These new common rss init APIs will be used to replace the old PF and VF
rss init APIs in next patches.

Signed-off-by: default avatarJie Wang <wangjie125@huawei.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      2c0d3f4c