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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b4024c9e5c
The caller of devm_ioremap_resource(), either accidentally
or by wrong assumption, is writing back derived resource data
to global static resource initialization tables that should
have been constant. Meaning that after it computes the final
physical start address it saves the address for no reason
in the static tables. This doesn't affect the first driver
probing after reboot, but it breaks consecutive driver reloads
(i.e. driver unbind & bind) because the initialization tables
no longer have the correct initial values. So the next probe()
will map the device registers to wrong physical addresses,
causing ARM SError async exceptions.
This patch fixes all of the above.
Fixes: 5605194877 ("net: dsa: ocelot: add driver for Felix switch family")
Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Tested-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright 2019 NXP Semiconductors
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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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/* 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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int shared_queue_sz;
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int num_mact_rows;
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const struct ocelot_stat_layout *stats_layout;
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unsigned int num_stats;
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int num_ports;
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struct vcap_field *vcap_is2_keys;
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struct vcap_field *vcap_is2_actions;
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const struct vcap_props *vcap;
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int switch_pci_bar;
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int imdio_pci_bar;
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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 (*pcs_init)(struct ocelot *ocelot, int port,
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unsigned int link_an_mode,
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const struct phylink_link_state *state);
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void (*pcs_an_restart)(struct ocelot *ocelot, int port);
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void (*pcs_link_state)(struct ocelot *ocelot, int port,
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struct phylink_link_state *state);
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int (*prevalidate_phy_mode)(struct ocelot *ocelot, int port,
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phy_interface_t phy_mode);
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};
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extern struct felix_info felix_info_vsc9959;
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enum felix_instance {
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FELIX_INSTANCE_VSC9959 = 0,
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};
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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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struct pci_dev *pdev;
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struct felix_info *info;
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struct ocelot ocelot;
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struct mii_bus *imdio;
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struct phy_device **pcs;
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};
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#endif
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