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@@ -0,0 +1,503 @@
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+/*
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+ * RapidIO interconnect services
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+ * (RapidIO Interconnect Specification, http://www.rapidio.org)
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+ *
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+ * Copyright 2005 MontaVista Software, Inc.
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+ * Matt Porter <mporter@kernel.crashing.org>
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+ *
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms of the GNU General Public License as published by the
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+ * Free Software Foundation; either version 2 of the License, or (at your
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+ * option) any later version.
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+ */
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+
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+#include <linux/config.h>
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+#include <linux/types.h>
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+#include <linux/kernel.h>
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+
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+#include <linux/delay.h>
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+#include <linux/init.h>
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+#include <linux/rio.h>
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+#include <linux/rio_drv.h>
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+#include <linux/rio_ids.h>
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+#include <linux/rio_regs.h>
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+#include <linux/module.h>
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+#include <linux/spinlock.h>
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+
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+#include "rio.h"
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+
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+static LIST_HEAD(rio_mports);
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+
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+/**
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+ * rio_local_get_device_id - Get the base/extended device id for a port
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+ * @port: RIO master port from which to get the deviceid
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+ *
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+ * Reads the base/extended device id from the local device
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+ * implementing the master port. Returns the 8/16-bit device
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+ * id.
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+ */
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+u16 rio_local_get_device_id(struct rio_mport *port)
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+{
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+ u32 result;
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+
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+ rio_local_read_config_32(port, RIO_DID_CSR, &result);
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+
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+ return (RIO_GET_DID(result));
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+}
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+
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+/**
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+ * rio_request_inb_mbox - request inbound mailbox service
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+ * @mport: RIO master port from which to allocate the mailbox resource
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+ * @mbox: Mailbox number to claim
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+ * @entries: Number of entries in inbound mailbox queue
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+ * @minb: Callback to execute when inbound message is received
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+ *
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+ * Requests ownership of an inbound mailbox resource and binds
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+ * a callback function to the resource. Returns %0 on success.
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+ */
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+int rio_request_inb_mbox(struct rio_mport *mport,
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+ int mbox,
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+ int entries,
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+ void (*minb) (struct rio_mport * mport, int mbox,
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+ int slot))
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+{
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+ int rc = 0;
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+
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+ struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
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+
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+ if (res) {
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+ rio_init_mbox_res(res, mbox, mbox);
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+
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+ /* Make sure this mailbox isn't in use */
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+ if ((rc =
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+ request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE],
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+ res)) < 0) {
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+ kfree(res);
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+ goto out;
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+ }
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+
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+ mport->inb_msg[mbox].res = res;
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+
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+ /* Hook the inbound message callback */
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+ mport->inb_msg[mbox].mcback = minb;
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+
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+ rc = rio_open_inb_mbox(mport, mbox, entries);
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+ } else
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+ rc = -ENOMEM;
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+
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+ out:
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+ return rc;
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+}
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+
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+/**
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+ * rio_release_inb_mbox - release inbound mailbox message service
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+ * @mport: RIO master port from which to release the mailbox resource
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+ * @mbox: Mailbox number to release
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+ *
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+ * Releases ownership of an inbound mailbox resource. Returns 0
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+ * if the request has been satisfied.
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+ */
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+int rio_release_inb_mbox(struct rio_mport *mport, int mbox)
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+{
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+ rio_close_inb_mbox(mport, mbox);
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+
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+ /* Release the mailbox resource */
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+ return release_resource(mport->inb_msg[mbox].res);
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+}
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+
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+/**
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+ * rio_request_outb_mbox - request outbound mailbox service
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+ * @mport: RIO master port from which to allocate the mailbox resource
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+ * @mbox: Mailbox number to claim
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+ * @entries: Number of entries in outbound mailbox queue
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+ * @moutb: Callback to execute when outbound message is sent
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+ *
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+ * Requests ownership of an outbound mailbox resource and binds
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+ * a callback function to the resource. Returns 0 on success.
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+ */
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+int rio_request_outb_mbox(struct rio_mport *mport,
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+ int mbox,
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+ int entries,
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+ void (*moutb) (struct rio_mport * mport, int mbox,
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+ int slot))
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+{
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+ int rc = 0;
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+
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+ struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
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+
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+ if (res) {
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+ rio_init_mbox_res(res, mbox, mbox);
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+
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+ /* Make sure this outbound mailbox isn't in use */
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+ if ((rc =
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+ request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE],
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+ res)) < 0) {
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+ kfree(res);
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+ goto out;
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+ }
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+
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+ mport->outb_msg[mbox].res = res;
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+
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+ /* Hook the inbound message callback */
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+ mport->outb_msg[mbox].mcback = moutb;
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+
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+ rc = rio_open_outb_mbox(mport, mbox, entries);
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+ } else
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+ rc = -ENOMEM;
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+
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+ out:
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+ return rc;
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+}
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+
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+/**
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+ * rio_release_outb_mbox - release outbound mailbox message service
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+ * @mport: RIO master port from which to release the mailbox resource
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+ * @mbox: Mailbox number to release
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+ *
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+ * Releases ownership of an inbound mailbox resource. Returns 0
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+ * if the request has been satisfied.
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+ */
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+int rio_release_outb_mbox(struct rio_mport *mport, int mbox)
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+{
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+ rio_close_outb_mbox(mport, mbox);
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+
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+ /* Release the mailbox resource */
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+ return release_resource(mport->outb_msg[mbox].res);
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+}
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+
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+/**
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+ * rio_setup_inb_dbell - bind inbound doorbell callback
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+ * @mport: RIO master port to bind the doorbell callback
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+ * @res: Doorbell message resource
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+ * @dinb: Callback to execute when doorbell is received
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+ *
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+ * Adds a doorbell resource/callback pair into a port's
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+ * doorbell event list. Returns 0 if the request has been
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+ * satisfied.
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+ */
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+static int
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+rio_setup_inb_dbell(struct rio_mport *mport, struct resource *res,
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+ void (*dinb) (struct rio_mport * mport, u16 src, u16 dst,
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+ u16 info))
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+{
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+ int rc = 0;
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+ struct rio_dbell *dbell;
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+
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+ if (!(dbell = kmalloc(sizeof(struct rio_dbell), GFP_KERNEL))) {
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+ rc = -ENOMEM;
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+ goto out;
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+ }
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+
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+ dbell->res = res;
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+ dbell->dinb = dinb;
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+
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+ list_add_tail(&dbell->node, &mport->dbells);
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+
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+ out:
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+ return rc;
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+}
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+
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+/**
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+ * rio_request_inb_dbell - request inbound doorbell message service
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+ * @mport: RIO master port from which to allocate the doorbell resource
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+ * @start: Doorbell info range start
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+ * @end: Doorbell info range end
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+ * @dinb: Callback to execute when doorbell is received
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+ *
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+ * Requests ownership of an inbound doorbell resource and binds
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+ * a callback function to the resource. Returns 0 if the request
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+ * has been satisfied.
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+ */
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+int rio_request_inb_dbell(struct rio_mport *mport,
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+ u16 start,
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+ u16 end,
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+ void (*dinb) (struct rio_mport * mport, u16 src,
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+ u16 dst, u16 info))
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+{
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+ int rc = 0;
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+
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+ struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
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+
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+ if (res) {
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+ rio_init_dbell_res(res, start, end);
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+
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+ /* Make sure these doorbells aren't in use */
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+ if ((rc =
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+ request_resource(&mport->riores[RIO_DOORBELL_RESOURCE],
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+ res)) < 0) {
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+ kfree(res);
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+ goto out;
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+ }
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+
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+ /* Hook the doorbell callback */
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+ rc = rio_setup_inb_dbell(mport, res, dinb);
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+ } else
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+ rc = -ENOMEM;
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+
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+ out:
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+ return rc;
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+}
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+
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+/**
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+ * rio_release_inb_dbell - release inbound doorbell message service
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+ * @mport: RIO master port from which to release the doorbell resource
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+ * @start: Doorbell info range start
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+ * @end: Doorbell info range end
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+ *
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+ * Releases ownership of an inbound doorbell resource and removes
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+ * callback from the doorbell event list. Returns 0 if the request
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+ * has been satisfied.
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+ */
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+int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end)
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+{
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+ int rc = 0, found = 0;
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+ struct rio_dbell *dbell;
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+
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+ list_for_each_entry(dbell, &mport->dbells, node) {
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+ if ((dbell->res->start == start) && (dbell->res->end == end)) {
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+ found = 1;
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+ break;
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+ }
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+ }
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+
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+ /* If we can't find an exact match, fail */
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+ if (!found) {
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+ rc = -EINVAL;
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+ goto out;
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+ }
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+
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+ /* Delete from list */
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+ list_del(&dbell->node);
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+
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+ /* Release the doorbell resource */
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+ rc = release_resource(dbell->res);
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+
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+ /* Free the doorbell event */
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+ kfree(dbell);
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+
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+ out:
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+ return rc;
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+}
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+
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+/**
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+ * rio_request_outb_dbell - request outbound doorbell message range
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+ * @rdev: RIO device from which to allocate the doorbell resource
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+ * @start: Doorbell message range start
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+ * @end: Doorbell message range end
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+ *
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+ * Requests ownership of a doorbell message range. Returns a resource
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+ * if the request has been satisfied or %NULL on failure.
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+ */
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+struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start,
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+ u16 end)
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+{
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+ struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
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+
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+ if (res) {
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+ rio_init_dbell_res(res, start, end);
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+
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+ /* Make sure these doorbells aren't in use */
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+ if (request_resource(&rdev->riores[RIO_DOORBELL_RESOURCE], res)
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+ < 0) {
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+ kfree(res);
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+ res = NULL;
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+ }
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+ }
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+
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+ return res;
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+}
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+
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+/**
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+ * rio_release_outb_dbell - release outbound doorbell message range
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+ * @rdev: RIO device from which to release the doorbell resource
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+ * @res: Doorbell resource to be freed
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+ *
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+ * Releases ownership of a doorbell message range. Returns 0 if the
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+ * request has been satisfied.
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+ */
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+int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res)
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+{
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+ int rc = release_resource(res);
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+
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+ kfree(res);
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+
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+ return rc;
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+}
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+
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+/**
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+ * rio_mport_get_feature - query for devices' extended features
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+ * @port: Master port to issue transaction
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+ * @local: Indicate a local master port or remote device access
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+ * @destid: Destination ID of the device
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+ * @hopcount: Number of switch hops to the device
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+ * @ftr: Extended feature code
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+ *
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+ * Tell if a device supports a given RapidIO capability.
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+ * Returns the offset of the requested extended feature
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+ * block within the device's RIO configuration space or
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+ * 0 in case the device does not support it. Possible
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+ * values for @ftr:
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+ *
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+ * %RIO_EFB_PAR_EP_ID LP/LVDS EP Devices
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+ *
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+ * %RIO_EFB_PAR_EP_REC_ID LP/LVDS EP Recovery Devices
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+ *
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+ * %RIO_EFB_PAR_EP_FREE_ID LP/LVDS EP Free Devices
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+ *
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+ * %RIO_EFB_SER_EP_ID LP/Serial EP Devices
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+ *
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+ * %RIO_EFB_SER_EP_REC_ID LP/Serial EP Recovery Devices
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+ *
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+ * %RIO_EFB_SER_EP_FREE_ID LP/Serial EP Free Devices
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+ */
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+u32
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+rio_mport_get_feature(struct rio_mport * port, int local, u16 destid,
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+ u8 hopcount, int ftr)
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+{
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+ u32 asm_info, ext_ftr_ptr, ftr_header;
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+
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+ if (local)
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+ rio_local_read_config_32(port, RIO_ASM_INFO_CAR, &asm_info);
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+ else
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+ rio_mport_read_config_32(port, destid, hopcount,
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+ RIO_ASM_INFO_CAR, &asm_info);
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+
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+ ext_ftr_ptr = asm_info & RIO_EXT_FTR_PTR_MASK;
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+
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+ while (ext_ftr_ptr) {
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+ if (local)
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+ rio_local_read_config_32(port, ext_ftr_ptr,
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+ &ftr_header);
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+ else
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+ rio_mport_read_config_32(port, destid, hopcount,
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+ ext_ftr_ptr, &ftr_header);
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+ if (RIO_GET_BLOCK_ID(ftr_header) == ftr)
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+ return ext_ftr_ptr;
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+ if (!(ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header)))
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+ break;
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+ }
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+
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+ return 0;
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+}
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+
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+/**
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+ * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did
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+ * @vid: RIO vid to match or %RIO_ANY_ID to match all vids
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+ * @did: RIO did to match or %RIO_ANY_ID to match all dids
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+ * @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids
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+ * @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_dids
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+ * @from: Previous RIO device found in search, or %NULL for new search
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+ *
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+ * Iterates through the list of known RIO devices. If a RIO device is
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+ * found with a matching @vid, @did, @asm_vid, @asm_did, the reference
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+ * count to the device is incrememted and a pointer to its device
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+ * structure is returned. Otherwise, %NULL is returned. A new search
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+ * is initiated by passing %NULL to the @from argument. Otherwise, if
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+ * @from is not %NULL, searches continue from next device on the global
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+ * list. The reference count for @from is always decremented if it is
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+ * not %NULL.
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+ */
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+struct rio_dev *rio_get_asm(u16 vid, u16 did,
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+ u16 asm_vid, u16 asm_did, struct rio_dev *from)
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+{
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+ struct list_head *n;
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+ struct rio_dev *rdev;
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+
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+ WARN_ON(in_interrupt());
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+ spin_lock(&rio_global_list_lock);
|
|
|
+ n = from ? from->global_list.next : rio_devices.next;
|
|
|
+
|
|
|
+ while (n && (n != &rio_devices)) {
|
|
|
+ rdev = rio_dev_g(n);
|
|
|
+ if ((vid == RIO_ANY_ID || rdev->vid == vid) &&
|
|
|
+ (did == RIO_ANY_ID || rdev->did == did) &&
|
|
|
+ (asm_vid == RIO_ANY_ID || rdev->asm_vid == asm_vid) &&
|
|
|
+ (asm_did == RIO_ANY_ID || rdev->asm_did == asm_did))
|
|
|
+ goto exit;
|
|
|
+ n = n->next;
|
|
|
+ }
|
|
|
+ rdev = NULL;
|
|
|
+ exit:
|
|
|
+ rio_dev_put(from);
|
|
|
+ rdev = rio_dev_get(rdev);
|
|
|
+ spin_unlock(&rio_global_list_lock);
|
|
|
+ return rdev;
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * rio_get_device - Begin or continue searching for a RIO device by vid/did
|
|
|
+ * @vid: RIO vid to match or %RIO_ANY_ID to match all vids
|
|
|
+ * @did: RIO did to match or %RIO_ANY_ID to match all dids
|
|
|
+ * @from: Previous RIO device found in search, or %NULL for new search
|
|
|
+ *
|
|
|
+ * Iterates through the list of known RIO devices. If a RIO device is
|
|
|
+ * found with a matching @vid and @did, the reference count to the
|
|
|
+ * device is incrememted and a pointer to its device structure is returned.
|
|
|
+ * Otherwise, %NULL is returned. A new search is initiated by passing %NULL
|
|
|
+ * to the @from argument. Otherwise, if @from is not %NULL, searches
|
|
|
+ * continue from next device on the global list. The reference count for
|
|
|
+ * @from is always decremented if it is not %NULL.
|
|
|
+ */
|
|
|
+struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from)
|
|
|
+{
|
|
|
+ return rio_get_asm(vid, did, RIO_ANY_ID, RIO_ANY_ID, from);
|
|
|
+}
|
|
|
+
|
|
|
+static void rio_fixup_device(struct rio_dev *dev)
|
|
|
+{
|
|
|
+}
|
|
|
+
|
|
|
+static int __devinit rio_init(void)
|
|
|
+{
|
|
|
+ struct rio_dev *dev = NULL;
|
|
|
+
|
|
|
+ while ((dev = rio_get_device(RIO_ANY_ID, RIO_ANY_ID, dev)) != NULL) {
|
|
|
+ rio_fixup_device(dev);
|
|
|
+ }
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+device_initcall(rio_init);
|
|
|
+
|
|
|
+int rio_init_mports(void)
|
|
|
+{
|
|
|
+ int rc = 0;
|
|
|
+ struct rio_mport *port;
|
|
|
+
|
|
|
+ list_for_each_entry(port, &rio_mports, node) {
|
|
|
+ if (!request_mem_region(port->iores.start,
|
|
|
+ port->iores.end - port->iores.start,
|
|
|
+ port->name)) {
|
|
|
+ printk(KERN_ERR
|
|
|
+ "RIO: Error requesting master port region %8.8lx-%8.8lx\n",
|
|
|
+ port->iores.start, port->iores.end - 1);
|
|
|
+ rc = -ENOMEM;
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (port->host_deviceid >= 0)
|
|
|
+ rio_enum_mport(port);
|
|
|
+ else
|
|
|
+ rio_disc_mport(port);
|
|
|
+ }
|
|
|
+
|
|
|
+ out:
|
|
|
+ return rc;
|
|
|
+}
|
|
|
+
|
|
|
+void rio_register_mport(struct rio_mport *port)
|
|
|
+{
|
|
|
+ list_add_tail(&port->node, &rio_mports);
|
|
|
+}
|
|
|
+
|
|
|
+EXPORT_SYMBOL_GPL(rio_local_get_device_id);
|
|
|
+EXPORT_SYMBOL_GPL(rio_get_device);
|
|
|
+EXPORT_SYMBOL_GPL(rio_get_asm);
|
|
|
+EXPORT_SYMBOL_GPL(rio_request_inb_dbell);
|
|
|
+EXPORT_SYMBOL_GPL(rio_release_inb_dbell);
|
|
|
+EXPORT_SYMBOL_GPL(rio_request_outb_dbell);
|
|
|
+EXPORT_SYMBOL_GPL(rio_release_outb_dbell);
|
|
|
+EXPORT_SYMBOL_GPL(rio_request_inb_mbox);
|
|
|
+EXPORT_SYMBOL_GPL(rio_release_inb_mbox);
|
|
|
+EXPORT_SYMBOL_GPL(rio_request_outb_mbox);
|
|
|
+EXPORT_SYMBOL_GPL(rio_release_outb_mbox);
|
Matt Porter