7a29d220f4
The error handling for the current tagging protocol change procedure is a bit brittle (we dismantle the previous tagging protocol entirely before setting up the new one). By identifying which parts of a tagging protocol are unique to itself and which parts are shared with the other, we can implement a protocol change procedure where error handling is a bit more robust, because we start setting up the new protocol first, and tear down the old one only after the setup of the specific and shared parts succeeded. The protocol change is a bit too open-coded too, in the area of migrating host flood settings and MDBs. By identifying what differs between tagging protocols (the forwarding masks for host flooding) we can implement a more straightforward migration procedure which is handled in the shared portion of the protocol change, rather than individually by each protocol. Therefore, a more structured approach calls for the introduction of a structure of function pointers per tagging protocol. This covers setup, teardown and the host forwarding mask. In the future it will also cover how to prepare for a new DSA master. The initial tagging protocol setup (at driver probe time) and the final teardown (at driver removal time) are also adapted to call into the structured methods of the specific protocol in current use. This is especially relevant for teardown, where we previously called felix_del_tag_protocol() only for the first CPU port. But by not specifying which CPU port this is for, we gain more flexibility to support multiple CPU ports in the future. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
97 lines
3.3 KiB
C
97 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright 2019 NXP
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*/
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#ifndef _MSCC_FELIX_H
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#define _MSCC_FELIX_H
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#define ocelot_to_felix(o) container_of((o), struct felix, ocelot)
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#define FELIX_MAC_QUIRKS OCELOT_QUIRK_PCS_PERFORMS_RATE_ADAPTATION
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#define OCELOT_PORT_MODE_INTERNAL BIT(0)
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#define OCELOT_PORT_MODE_SGMII BIT(1)
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#define OCELOT_PORT_MODE_QSGMII BIT(2)
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#define OCELOT_PORT_MODE_2500BASEX BIT(3)
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#define OCELOT_PORT_MODE_USXGMII BIT(4)
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#define OCELOT_PORT_MODE_1000BASEX BIT(5)
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/* Platform-specific information */
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struct felix_info {
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const struct resource *target_io_res;
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const struct resource *port_io_res;
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const struct resource *imdio_res;
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const struct reg_field *regfields;
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const u32 *const *map;
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const struct ocelot_ops *ops;
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const u32 *port_modes;
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int num_mact_rows;
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const struct ocelot_stat_layout *stats_layout;
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int num_ports;
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int num_tx_queues;
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struct vcap_props *vcap;
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u16 vcap_pol_base;
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u16 vcap_pol_max;
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u16 vcap_pol_base2;
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u16 vcap_pol_max2;
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const struct ptp_clock_info *ptp_caps;
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/* Some Ocelot switches are integrated into the SoC without the
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* extraction IRQ line connected to the ARM GIC. By enabling this
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* workaround, the few packets that are delivered to the CPU port
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* module (currently only PTP) are copied not only to the hardware CPU
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* port module, but also to the 802.1Q Ethernet CPU port, and polling
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* the extraction registers is triggered once the DSA tagger sees a PTP
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* frame. The Ethernet frame is only used as a notification: it is
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* dropped, and the original frame is extracted over MMIO and annotated
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* with the RX timestamp.
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*/
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bool quirk_no_xtr_irq;
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int (*mdio_bus_alloc)(struct ocelot *ocelot);
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void (*mdio_bus_free)(struct ocelot *ocelot);
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void (*phylink_validate)(struct ocelot *ocelot, int port,
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unsigned long *supported,
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struct phylink_link_state *state);
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int (*port_setup_tc)(struct dsa_switch *ds, int port,
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enum tc_setup_type type, void *type_data);
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void (*port_sched_speed_set)(struct ocelot *ocelot, int port,
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u32 speed);
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struct regmap *(*init_regmap)(struct ocelot *ocelot,
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struct resource *res);
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};
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/* Methods for initializing the hardware resources specific to a tagging
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* protocol (like the NPI port, for "ocelot" or "seville", or the VCAP TCAMs,
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* for "ocelot-8021q").
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* It is important that the resources configured here do not have side effects
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* for the other tagging protocols. If that is the case, their configuration
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* needs to go to felix_tag_proto_setup_shared().
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*/
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struct felix_tag_proto_ops {
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int (*setup)(struct dsa_switch *ds);
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void (*teardown)(struct dsa_switch *ds);
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unsigned long (*get_host_fwd_mask)(struct dsa_switch *ds);
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};
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extern const struct dsa_switch_ops felix_switch_ops;
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/* DSA glue / front-end for struct ocelot */
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struct felix {
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struct dsa_switch *ds;
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const struct felix_info *info;
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struct ocelot ocelot;
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struct mii_bus *imdio;
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struct phylink_pcs **pcs;
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resource_size_t switch_base;
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resource_size_t imdio_base;
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enum dsa_tag_protocol tag_proto;
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const struct felix_tag_proto_ops *tag_proto_ops;
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struct kthread_worker *xmit_worker;
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unsigned long host_flood_uc_mask;
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unsigned long host_flood_mc_mask;
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};
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struct net_device *felix_port_to_netdev(struct ocelot *ocelot, int port);
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int felix_netdev_to_port(struct net_device *dev);
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#endif
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