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SubjectRe: [PATCH 3/7] RapidIO: Add Port-Write handling for EM
Alexandre Bounine wrote:
> /**
> + * rio_em_set_ops- Sets Error Managment operations for a particular vendor switch
> + * @rdev: RIO device
> + *
> + * Searches the RIO EM ops table for known switch types. If the vid
> + * and did match a switch table entry, then set the em_init() and
> + * em_handle() ops to the table entry values.

Shouldn't any RIO device be able to support error management, not just
switches?

> +/**
> + * rio_pw_enable - Enables/disables port-write handling by a master port
> + * @port: Master port associated with port-write handling
> + * @enable: 1=enable, 0=disable
> + */
> +static void rio_pw_enable(struct rio_mport *port, int enable)
> +{
> + if (port->ops->pwenable)
> + port->ops->pwenable(port, enable);
> +}
> +

Maybe this can be done by switch->init function?

> +/**
> + * rio_inb_pwrite_handler - process inbound port-write message
> + * @pw_msg: pointer to inbound port-write message
> + *
> + * Processes an inbound port-write message. Returns 0 if the request
> + * has been satisfied.
> + */
> +int rio_inb_pwrite_handler(u32 *pw_msg)
> +{

Perhaps map this pw_msg to a struct? Or read it into named variables?

> + /* Clear Port Errors */
> + rio_mport_write_config_32(mport, destid, hopcount,
> + rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum),
> + err_status & 0x07120204);

Hardcoded value!

> +
> + if (rdev->rswitch->port_ok & (1 << portnum)) {
> + if (err_status & RIO_PORT_N_ERR_STS_PORT_UNINIT) {
> + rdev->rswitch->port_ok &= ~(1 << portnum);
> + rio_mport_read_config_32(mport, destid, hopcount,
> + rdev->phys_efptr + RIO_PORT_N_CTL_CSR(portnum),
> + &regval);
> + rio_mport_write_config_32(mport, destid, hopcount,
> + rdev->phys_efptr + RIO_PORT_N_CTL_CSR(portnum),
> + regval | RIO_PORT_N_CTL_LOCKOUT);

You have a function for this?

> + rio_mport_write_config_32(mport, destid, hopcount,
> + rdev->phys_efptr +
> + RIO_PORT_N_ACK_STS_CSR(portnum),
> + RIO_PORT_N_ACK_CLEAR);

This doesn't work for the 568; but the 568 has no special handling?

> + /* Clear Port-Write Pending bit */
> + rio_mport_write_config_32(mport, destid, hopcount,
> + rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum),
> + RIO_PORT_N_ERR_STS_PW_PEND);
> +DECLARE_RIO_EM_OPS(RIO_VID_TUNDRA, RIO_DID_TSI572, tsi57x_em_init, tsi57x_em_handler);
> +DECLARE_RIO_EM_OPS(RIO_VID_TUNDRA, RIO_DID_TSI574, tsi57x_em_init, tsi57x_em_handler);
> +DECLARE_RIO_EM_OPS(RIO_VID_TUNDRA, RIO_DID_TSI577, tsi57x_em_init, tsi57x_em_handler);
> +DECLARE_RIO_EM_OPS(RIO_VID_TUNDRA, RIO_DID_TSI578, tsi57x_em_init, tsi57x_em_handler);

Why not declare these along with the other ops?

Micha


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