diff options
Diffstat (limited to 'drivers/rapidio')
| -rw-r--r-- | drivers/rapidio/Kconfig | 18 | ||||
| -rw-r--r-- | drivers/rapidio/Makefile | 6 | ||||
| -rw-r--r-- | drivers/rapidio/rio-access.c | 175 | ||||
| -rw-r--r-- | drivers/rapidio/rio-driver.c | 229 | ||||
| -rw-r--r-- | drivers/rapidio/rio-scan.c | 945 | ||||
| -rw-r--r-- | drivers/rapidio/rio-sysfs.c | 230 | ||||
| -rw-r--r-- | drivers/rapidio/rio.c | 510 | ||||
| -rw-r--r-- | drivers/rapidio/rio.h | 60 | ||||
| -rw-r--r-- | drivers/rapidio/switches/Makefile | 5 | ||||
| -rw-r--r-- | drivers/rapidio/switches/tsi500.c | 60 |
10 files changed, 2238 insertions, 0 deletions
diff --git a/drivers/rapidio/Kconfig b/drivers/rapidio/Kconfig new file mode 100644 index 00000000000..0b2d2c3579a --- /dev/null +++ b/drivers/rapidio/Kconfig @@ -0,0 +1,18 @@ +# +# RapidIO configuration +# +config RAPIDIO_8_BIT_TRANSPORT + bool "8-bit transport addressing" + depends on RAPIDIO + ---help--- + By default, the kernel assumes a 16-bit addressed RapidIO + network. By selecting this option, the kernel will support + an 8-bit addressed network. + +config RAPIDIO_DISC_TIMEOUT + int "Discovery timeout duration (seconds)" + depends on RAPIDIO + default "30" + ---help--- + Amount of time a discovery node waits for a host to complete + enumeration beforing giving up. diff --git a/drivers/rapidio/Makefile b/drivers/rapidio/Makefile new file mode 100644 index 00000000000..7c0e1818de5 --- /dev/null +++ b/drivers/rapidio/Makefile @@ -0,0 +1,6 @@ +# +# Makefile for RapidIO interconnect services +# +obj-y += rio.o rio-access.o rio-driver.o rio-scan.o rio-sysfs.o + +obj-$(CONFIG_RAPIDIO) += switches/ diff --git a/drivers/rapidio/rio-access.c b/drivers/rapidio/rio-access.c new file mode 100644 index 00000000000..b9fab2ae3a3 --- /dev/null +++ b/drivers/rapidio/rio-access.c @@ -0,0 +1,175 @@ +/* + * RapidIO configuration space access support + * + * Copyright 2005 MontaVista Software, Inc. + * Matt Porter <mporter@kernel.crashing.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/rio.h> +#include <linux/module.h> + +/* + * These interrupt-safe spinlocks protect all accesses to RIO + * configuration space and doorbell access. + */ +static spinlock_t rio_config_lock = SPIN_LOCK_UNLOCKED; +static spinlock_t rio_doorbell_lock = SPIN_LOCK_UNLOCKED; + +/* + * Wrappers for all RIO configuration access functions. They just check + * alignment, do locking and call the low-level functions pointed to + * by rio_mport->ops. + */ + +#define RIO_8_BAD 0 +#define RIO_16_BAD (offset & 1) +#define RIO_32_BAD (offset & 3) + +/** + * RIO_LOP_READ - Generate rio_local_read_config_* functions + * @size: Size of configuration space read (8, 16, 32 bits) + * @type: C type of value argument + * @len: Length of configuration space read (1, 2, 4 bytes) + * + * Generates rio_local_read_config_* functions used to access + * configuration space registers on the local device. + */ +#define RIO_LOP_READ(size,type,len) \ +int __rio_local_read_config_##size \ + (struct rio_mport *mport, u32 offset, type *value) \ +{ \ + int res; \ + unsigned long flags; \ + u32 data = 0; \ + if (RIO_##size##_BAD) return RIO_BAD_SIZE; \ + spin_lock_irqsave(&rio_config_lock, flags); \ + res = mport->ops->lcread(mport->id, offset, len, &data); \ + *value = (type)data; \ + spin_unlock_irqrestore(&rio_config_lock, flags); \ + return res; \ +} + +/** + * RIO_LOP_WRITE - Generate rio_local_write_config_* functions + * @size: Size of configuration space write (8, 16, 32 bits) + * @type: C type of value argument + * @len: Length of configuration space write (1, 2, 4 bytes) + * + * Generates rio_local_write_config_* functions used to access + * configuration space registers on the local device. + */ +#define RIO_LOP_WRITE(size,type,len) \ +int __rio_local_write_config_##size \ + (struct rio_mport *mport, u32 offset, type value) \ +{ \ + int res; \ + unsigned long flags; \ + if (RIO_##size##_BAD) return RIO_BAD_SIZE; \ + spin_lock_irqsave(&rio_config_lock, flags); \ + res = mport->ops->lcwrite(mport->id, offset, len, value); \ + spin_unlock_irqrestore(&rio_config_lock, flags); \ + return res; \ +} + +RIO_LOP_READ(8, u8, 1) +RIO_LOP_READ(16, u16, 2) +RIO_LOP_READ(32, u32, 4) +RIO_LOP_WRITE(8, u8, 1) +RIO_LOP_WRITE(16, u16, 2) +RIO_LOP_WRITE(32, u32, 4) + +EXPORT_SYMBOL_GPL(__rio_local_read_config_8); +EXPORT_SYMBOL_GPL(__rio_local_read_config_16); +EXPORT_SYMBOL_GPL(__rio_local_read_config_32); +EXPORT_SYMBOL_GPL(__rio_local_write_config_8); +EXPORT_SYMBOL_GPL(__rio_local_write_config_16); +EXPORT_SYMBOL_GPL(__rio_local_write_config_32); + +/** + * RIO_OP_READ - Generate rio_mport_read_config_* functions + * @size: Size of configuration space read (8, 16, 32 bits) + * @type: C type of value argument + * @len: Length of configuration space read (1, 2, 4 bytes) + * + * Generates rio_mport_read_config_* functions used to access + * configuration space registers on the local device. + */ +#define RIO_OP_READ(size,type,len) \ +int rio_mport_read_config_##size \ + (struct rio_mport *mport, u16 destid, u8 hopcount, u32 offset, type *value) \ +{ \ + int res; \ + unsigned long flags; \ + u32 data = 0; \ + if (RIO_##size##_BAD) return RIO_BAD_SIZE; \ + spin_lock_irqsave(&rio_config_lock, flags); \ + res = mport->ops->cread(mport->id, destid, hopcount, offset, len, &data); \ + *value = (type)data; \ + spin_unlock_irqrestore(&rio_config_lock, flags); \ + return res; \ +} + +/** + * RIO_OP_WRITE - Generate rio_mport_write_config_* functions + * @size: Size of configuration space write (8, 16, 32 bits) + * @type: C type of value argument + * @len: Length of configuration space write (1, 2, 4 bytes) + * + * Generates rio_mport_write_config_* functions used to access + * configuration space registers on the local device. + */ +#define RIO_OP_WRITE(size,type,len) \ +int rio_mport_write_config_##size \ + (struct rio_mport *mport, u16 destid, u8 hopcount, u32 offset, type value) \ +{ \ + int res; \ + unsigned long flags; \ + if (RIO_##size##_BAD) return RIO_BAD_SIZE; \ + spin_lock_irqsave(&rio_config_lock, flags); \ + res = mport->ops->cwrite(mport->id, destid, hopcount, offset, len, value); \ + spin_unlock_irqrestore(&rio_config_lock, flags); \ + return res; \ +} + +RIO_OP_READ(8, u8, 1) +RIO_OP_READ(16, u16, 2) +RIO_OP_READ(32, u32, 4) +RIO_OP_WRITE(8, u8, 1) +RIO_OP_WRITE(16, u16, 2) +RIO_OP_WRITE(32, u32, 4) + +EXPORT_SYMBOL_GPL(rio_mport_read_config_8); +EXPORT_SYMBOL_GPL(rio_mport_read_config_16); +EXPORT_SYMBOL_GPL(rio_mport_read_config_32); +EXPORT_SYMBOL_GPL(rio_mport_write_config_8); +EXPORT_SYMBOL_GPL(rio_mport_write_config_16); +EXPORT_SYMBOL_GPL(rio_mport_write_config_32); + +/** + * rio_mport_send_doorbell - Send a doorbell message + * + * @mport: RIO master port + * @destid: RIO device destination ID + * @data: Doorbell message data + * + * Send a doorbell message to a RIO device. The doorbell message + * has a 16-bit info field provided by the data argument. + */ +int rio_mport_send_doorbell(struct rio_mport *mport, u16 destid, u16 data) +{ + int res; + unsigned long flags; + + spin_lock_irqsave(&rio_doorbell_lock, flags); + res = mport->ops->dsend(mport->id, destid, data); + spin_unlock_irqrestore(&rio_doorbell_lock, flags); + + return res; +} + +EXPORT_SYMBOL_GPL(rio_mport_send_doorbell); diff --git a/drivers/rapidio/rio-driver.c b/drivers/rapidio/rio-driver.c new file mode 100644 index 00000000000..dc749609699 --- /dev/null +++ b/drivers/rapidio/rio-driver.c @@ -0,0 +1,229 @@ +/* + * RapidIO driver support + * + * Copyright 2005 MontaVista Software, Inc. + * Matt Porter <mporter@kernel.crashing.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/rio.h> +#include <linux/rio_ids.h> + +#include "rio.h" + +/** + * rio_match_device - Tell if a RIO device has a matching RIO device id structure + * @id: the RIO device id structure to match against + * @rdev: the RIO device structure to match against + * + * Used from driver probe and bus matching to check whether a RIO device + * matches a device id structure provided by a RIO driver. Returns the + * matching &struct rio_device_id or %NULL if there is no match. + */ +static const struct rio_device_id *rio_match_device(const struct rio_device_id + *id, + const struct rio_dev *rdev) +{ + while (id->vid || id->asm_vid) { + if (((id->vid == RIO_ANY_ID) || (id->vid == rdev->vid)) && + ((id->did == RIO_ANY_ID) || (id->did == rdev->did)) && + ((id->asm_vid == RIO_ANY_ID) + || (id->asm_vid == rdev->asm_vid)) + && ((id->asm_did == RIO_ANY_ID) + || (id->asm_did == rdev->asm_did))) + return id; + id++; + } + return NULL; +} + +/** + * rio_dev_get - Increments the reference count of the RIO device structure + * + * @rdev: RIO device being referenced + * + * Each live reference to a device should be refcounted. + * + * Drivers for RIO devices should normally record such references in + * their probe() methods, when they bind to a device, and release + * them by calling rio_dev_put(), in their disconnect() methods. + */ +struct rio_dev *rio_dev_get(struct rio_dev *rdev) +{ + if (rdev) + get_device(&rdev->dev); + + return rdev; +} + +/** + * rio_dev_put - Release a use of the RIO device structure + * + * @rdev: RIO device being disconnected + * + * Must be called when a user of a device is finished with it. + * When the last user of the device calls this function, the + * memory of the device is freed. + */ +void rio_dev_put(struct rio_dev *rdev) +{ + if (rdev) + put_device(&rdev->dev); +} + +/** + * rio_device_probe - Tell if a RIO device structure has a matching RIO + * device id structure + * @id: the RIO device id structure to match against + * @dev: the RIO device structure to match against + * + * return 0 and set rio_dev->driver when drv claims rio_dev, else error + */ +static int rio_device_probe(struct device *dev) +{ + struct rio_driver *rdrv = to_rio_driver(dev->driver); + struct rio_dev *rdev = to_rio_dev(dev); + int error = -ENODEV; + const struct rio_device_id *id; + + if (!rdev->driver && rdrv->probe) { + if (!rdrv->id_table) + return error; + id = rio_match_device(rdrv->id_table, rdev); + rio_dev_get(rdev); + if (id) + error = rdrv->probe(rdev, id); + if (error >= 0) { + rdev->driver = rdrv; + error = 0; + rio_dev_put(rdev); + } + } + return error; +} + +/** + * rio_device_remove - Remove a RIO device from the system + * + * @dev: the RIO device structure to match against + * + * Remove a RIO device from the system. If it has an associated + * driver, then run the driver remove() method. Then update + * the reference count. + */ +static int rio_device_remove(struct device *dev) +{ + struct rio_dev *rdev = to_rio_dev(dev); + struct rio_driver *rdrv = rdev->driver; + + if (rdrv) { + if (rdrv->remove) + rdrv->remove(rdev); + rdev->driver = NULL; + } + + rio_dev_put(rdev); + + return 0; +} + +/** + * rio_register_driver - register a new RIO driver + * @rdrv: the RIO driver structure to register + * + * Adds a &struct rio_driver to the list of registered drivers + * Returns a negative value on error, otherwise 0. If no error + * occurred, the driver remains registered even if no device + * was claimed during registration. + */ +int rio_register_driver(struct rio_driver *rdrv) +{ + /* initialize common driver fields */ + rdrv->driver.name = rdrv->name; + rdrv->driver.bus = &rio_bus_type; + rdrv->driver.probe = rio_device_probe; + rdrv->driver.remove = rio_device_remove; + + /* register with core */ + return driver_register(&rdrv->driver); +} + +/** + * rio_unregister_driver - unregister a RIO driver + * @rdrv: the RIO driver structure to unregister + * + * Deletes the &struct rio_driver from the list of registered RIO + * drivers, gives it a chance to clean up by calling its remove() + * function for each device it was responsible for, and marks those + * devices as driverless. + */ +void rio_unregister_driver(struct rio_driver *rdrv) +{ + driver_unregister(&rdrv->driver); +} + +/** + * rio_match_bus - Tell if a RIO device structure has a matching RIO + * driver device id structure + * @dev: the standard device structure to match against + * @drv: the standard driver structure containing the ids to match against + * + * Used by a driver to check whether a RIO device present in the + * system is in its list of supported devices. Returns 1 if + * there is a matching &struct rio_device_id or 0 if there is + * no match. + */ +static int rio_match_bus(struct device *dev, struct device_driver *drv) +{ + struct rio_dev *rdev = to_rio_dev(dev); + struct rio_driver *rdrv = to_rio_driver(drv); + const struct rio_device_id *id = rdrv->id_table; + const struct rio_device_id *found_id; + + if (!id) + goto out; + + found_id = rio_match_device(id, rdev); + + if (found_id) + return 1; + + out:return 0; +} + +static struct device rio_bus = { + .bus_id = "rapidio", +}; + +struct bus_type rio_bus_type = { + .name = "rapidio", + .match = rio_match_bus, + .dev_attrs = rio_dev_attrs +}; + +/** + * rio_bus_init - Register the RapidIO bus with the device model + * + * Registers the RIO bus device and RIO bus type with the Linux + * device model. + */ +static int __init rio_bus_init(void) +{ + if (device_register(&rio_bus) < 0) + printk("RIO: failed to register RIO bus device\n"); + return bus_register(&rio_bus_type); +} + +postcore_initcall(rio_bus_init); + +EXPORT_SYMBOL_GPL(rio_register_driver); +EXPORT_SYMBOL_GPL(rio_unregister_driver); +EXPORT_SYMBOL_GPL(rio_bus_type); +EXPORT_SYMBOL_GPL(rio_dev_get); +EXPORT_SYMBOL_GPL(rio_dev_put); diff --git a/drivers/rapidio/rio-scan.c b/drivers/rapidio/rio-scan.c new file mode 100644 index 00000000000..4f7ed4bd3be --- /dev/null +++ b/drivers/rapidio/rio-scan.c @@ -0,0 +1,945 @@ +/* + * RapidIO enumeration and discovery support + * + * Copyright 2005 MontaVista Software, Inc. + * Matt Porter <mporter@kernel.crashing.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/config.h> +#include <linux/types.h> +#include <linux/kernel.h> + +#include <linux/delay.h> +#include <linux/dma-mapping.h> +#include <linux/init.h> +#include <linux/rio.h> +#include <linux/rio_drv.h> +#include <linux/rio_ids.h> +#include <linux/rio_regs.h> +#include <linux/module.h> +#include <linux/spinlock.h> +#include <linux/timer.h> + +#include "rio.h" + +LIST_HEAD(rio_devices); +static LIST_HEAD(rio_switches); + +#define RIO_ENUM_CMPL_MAGIC 0xdeadbeef + +static void rio_enum_timeout(unsigned long); + +DEFINE_SPINLOCK(rio_global_list_lock); + +static int next_destid = 0; +static int next_switchid = 0; +static int next_net = 0; + +static struct timer_list rio_enum_timer = +TIMER_INITIALIZER(rio_enum_timeout, 0, 0); + +static int rio_mport_phys_table[] = { + RIO_EFB_PAR_EP_ID, + RIO_EFB_PAR_EP_REC_ID, + RIO_EFB_SER_EP_ID, + RIO_EFB_SER_EP_REC_ID, + -1, +}; + +static int rio_sport_phys_table[] = { + RIO_EFB_PAR_EP_FREE_ID, + RIO_EFB_SER_EP_FREE_ID, + -1, +}; + +/** + * rio_get_device_id - Get the base/extended device id for a device + * @port: RIO master port + * @destid: Destination ID of device + * @hopcount: Hopcount to device + * + * Reads the base/extended device id from a device. Returns the + * 8/16-bit device ID. + */ +static u16 rio_get_device_id(struct rio_mport *port, u16 destid, u8 hopcount) +{ + u32 result; + + rio_mport_read_config_32(port, destid, hopcount, RIO_DID_CSR, &result); + + return RIO_GET_DID(result); +} + +/** + * rio_set_device_id - Set the base/extended device id for a device + * @port: RIO master port + * @destid: Destination ID of device + * @hopcount: Hopcount to device + * @did: Device ID value to be written + * + * Writes the base/extended device id from a device. + */ +static void rio_set_device_id(struct rio_mport *port, u16 destid, u8 hopcount, u16 did) +{ + rio_mport_write_config_32(port, destid, hopcount, RIO_DID_CSR, + RIO_SET_DID(did)); +} + +/** + * rio_local_set_device_id - Set the base/extended device id for a port + * @port: RIO master port + * @did: Device ID value to be written + * + * Writes the base/extended device id from a device. + */ +static void rio_local_set_device_id(struct rio_mport *port, u16 did) +{ + rio_local_write_config_32(port, RIO_DID_CSR, RIO_SET_DID(did)); +} + +/** + * rio_clear_locks- Release all host locks and signal enumeration complete + * @port: Master port to issue transaction + * + * Marks the component tag CSR on each device with the enumeration + * complete flag. When complete, it then release the host locks on + * each device. Returns 0 on success or %-EINVAL on failure. + */ +static int rio_clear_locks(struct rio_mport *port) +{ + struct rio_dev *rdev; + u32 result; + int ret = 0; + + /* Write component tag CSR magic complete value */ + rio_local_write_config_32(port, RIO_COMPONENT_TAG_CSR, + RIO_ENUM_CMPL_MAGIC); + list_for_each_entry(rdev, &rio_devices, global_list) + rio_write_config_32(rdev, RIO_COMPONENT_TAG_CSR, + RIO_ENUM_CMPL_MAGIC); + + /* Release host device id locks */ + rio_local_write_config_32(port, RIO_HOST_DID_LOCK_CSR, + port->host_deviceid); + rio_local_read_config_32(port, RIO_HOST_DID_LOCK_CSR, &result); + if ((result & 0xffff) != 0xffff) { + printk(KERN_INFO + "RIO: badness when releasing host lock on master port, result %8.8x\n", + result); + ret = -EINVAL; + } + list_for_each_entry(rdev, &rio_devices, global_list) { + rio_write_config_32(rdev, RIO_HOST_DID_LOCK_CSR, + port->host_deviceid); + rio_read_config_32(rdev, RIO_HOST_DID_LOCK_CSR, &result); + if ((result & 0xffff) != 0xffff) { + printk(KERN_INFO + "RIO: badness when releasing host lock on vid %4.4x did %4.4x\n", + rdev->vid, rdev->did); + ret = -EINVAL; + } + } + + return ret; +} + +/** + * rio_enum_host- Set host lock and initialize host destination ID + * @port: Master port to issue transaction + * + * Sets the local host master port lock and destination ID register + * with the host device ID value. The host device ID value is provided + * by the platform. Returns %0 on success or %-1 on failure. + */ +static int rio_enum_host(struct rio_mport *port) +{ + u32 result; + + /* Set master port host device id lock */ + rio_local_write_config_32(port, RIO_HOST_DID_LOCK_CSR, + port->host_deviceid); + + rio_local_read_config_32(port, RIO_HOST_DID_LOCK_CSR, &result); + if ((result & 0xffff) != port->host_deviceid) + return -1; + + /* Set master port destid and init destid ctr */ + rio_local_set_device_id(port, port->host_deviceid); + + if (next_destid == port->host_deviceid) + next_destid++; + + return 0; +} + +/** + * rio_device_has_destid- Test if a device contains a destination ID register + * @port: Master port to issue transaction + * @src_ops: RIO device source operations + * @dst_ops: RIO device destination operations + * + * Checks the provided @src_ops and @dst_ops for the necessary transaction + * capabilities that indicate whether or not a device will implement a + * destination ID register. Returns 1 if true or 0 if false. + */ +static int rio_device_has_destid(struct rio_mport *port, int src_ops, + int dst_ops) +{ + u32 mask = RIO_OPS_READ | RIO_OPS_WRITE | RIO_OPS_ATOMIC_TST_SWP | RIO_OPS_ATOMIC_INC | RIO_OPS_ATOMIC_DEC | RIO_OPS_ATOMIC_SET | RIO_OPS_ATOMIC_CLR; + + return !!((src_ops | dst_ops) & mask); +} + +/** + * rio_release_dev- Frees a RIO device struct + * @dev: LDM device associated with a RIO device struct + * + * Gets the RIO device struct associated a RIO device struct. + * The RIO device struct is freed. + */ +static void rio_release_dev(struct device *dev) +{ + struct rio_dev *rdev; + + rdev = to_rio_dev(dev); + kfree(rdev); +} + +/** + * rio_is_switch- Tests if a RIO device has switch capabilities + * @rdev: RIO device + * + * Gets the RIO device Processing Element Features register + * contents and tests for switch capabilities. Returns 1 if + * the device is a switch or 0 if it is not a switch. + * The RIO device struct is freed. + */ +static int rio_is_switch(struct rio_dev *rdev) +{ + if (rdev->pef & RIO_PEF_SWITCH) + return 1; + return 0; +} + +/** + * rio_route_set_ops- Sets routing operations for a particular vendor switch + * @rdev: RIO device + * + * Searches the RIO route ops table for known switch types. If the vid + * and did match a switch table entry, then set the add_entry() and + * get_entry() ops to the table entry values. + */ +static void rio_route_set_ops(struct rio_dev *rdev) +{ + struct rio_route_ops *cur = __start_rio_route_ops; + struct rio_route_ops *end = __end_rio_route_ops; + + while (cur < end) { + if ((cur->vid == rdev->vid) && (cur->did == rdev->did)) { + pr_debug("RIO: adding routing ops for %s\n", rio_name(rdev)); + rdev->rswitch->add_entry = cur->add_hook; + rdev->rswitch->get_entry = cur->get_hook; + } + cur++; + } + + if (!rdev->rswitch->add_entry || !rdev->rswitch->get_entry) + printk(KERN_ERR "RIO: missing routing ops for %s\n", + rio_name(rdev)); +} + +/** + * rio_add_device- Adds a RIO device to the device model + * @rdev: RIO device + * + * Adds the RIO device to the global device list and adds the RIO + * device to the RIO device list. Creates the generic sysfs nodes + * for an RIO device. + */ +static void __devinit rio_add_device(struct rio_dev *rdev) +{ + device_add(&rdev->dev); + + spin_lock(&rio_global_list_lock); + list_add_tail(&rdev->global_list, &rio_devices); + spin_unlock(&rio_global_list_lock); + + rio_create_sysfs_dev_files(rdev); +} + +/** + * rio_setup_device- Allocates and sets up a RIO device + * @net: RIO network + * @port: Master port to send transactions + * @destid: Current destination ID + * @hopcount: Current hopcount + * @do_enum: Enumeration/Discovery mode flag + * + * Allocates a RIO device and configures fields based on configuration + * space contents. If device has a destination ID register, a destination + * ID is either assigned in enumeration mode or read from configuration + * space in discovery mode. If the device has switch capabilities, then + * a switch is allocated and configured appropriately. Returns a pointer + * to a RIO device on success or NULL on failure. + * + */ +static struct rio_dev *rio_setup_device(struct rio_net *net, + struct rio_mport *port, u16 destid, + u8 hopcount, int do_enum) +{ + struct rio_dev *rdev; + struct rio_switch *rswitch; + int result, rdid; + + rdev = kmalloc(sizeof(struct rio_dev), GFP_KERNEL); + if (!rdev) + goto out; + + memset(rdev, 0, sizeof(struct rio_dev)); + rdev->net = net; + rio_mport_read_config_32(port, destid, hopcount, RIO_DEV_ID_CAR, + &result); + rdev->did = result >> 16; + rdev->vid = result & 0xffff; + rio_mport_read_config_32(port, destid, hopcount, RIO_DEV_INFO_CAR, + &rdev->device_rev); + rio_mport_read_config_32(port, destid, hopcount, RIO_ASM_ID_CAR, + &result); + rdev->asm_did = result >> 16; + rdev->asm_vid = result & 0xffff; + rio_mport_read_config_32(port, destid, hopcount, RIO_ASM_INFO_CAR, + &result); + rdev->asm_rev = result >> 16; + rio_mport_read_config_32(port, destid, hopcount, RIO_PEF_CAR, + &rdev->pef); + if (rdev->pef & RIO_PEF_EXT_FEATURES) + rdev->efptr = result & 0xffff; + + rio_mport_read_config_32(port, destid, hopcount, RIO_SRC_OPS_CAR, + &rdev->src_ops); + rio_mport_read_config_32(port, destid, hopcount, RIO_DST_OPS_CAR, + &rdev->dst_ops); + + if (rio_device_has_destid(port, rdev->src_ops, rdev->dst_ops) + && do_enum) { + rio_set_device_id(port, destid, hopcount, next_destid); + rdev->destid = next_destid++; + if (next_destid == port->host_deviceid) + next_destid++; + } else + rdev->destid = rio_get_device_id(port, destid, hopcount); + + /* If a PE has both switch and other functions, show it as a switch */ + if (rio_is_switch(rdev)) { + rio_mport_read_config_32(port, destid, hopcount, + RIO_SWP_INFO_CAR, &rdev->swpinfo); + rswitch = kmalloc(sizeof(struct rio_switch), GFP_KERNEL); + if (!rswitch) { + kfree(rdev); + rdev = NULL; + goto out; + } + rswitch->switchid = next_switchid; + rswitch->hopcount = hopcount; + rswitch->destid = 0xffff; + /* Initialize switch route table */ + for (rdid = 0; rdid < RIO_MAX_ROUTE_ENTRIES; rdid++) + rswitch->route_table[rdid] = RIO_INVALID_ROUTE; + rdev->rswitch = rswitch; + sprintf(rio_name(rdev), "%02x:s:%04x", rdev->net->id, + rdev->rswitch->switchid); + rio_route_set_ops(rdev); + + list_add_tail(&rswitch->node, &rio_switches); + + } else + sprintf(rio_name(rdev), "%02x:e:%04x", rdev->net->id, + rdev->destid); + + rdev->dev.bus = &rio_bus_type; + + device_initialize(&rdev->dev); + rdev->dev.release = rio_release_dev; + rio_dev_get(rdev); + + rdev->dma_mask = DMA_32BIT_MASK; + rdev->dev.dma_mask = &rdev->dma_mask; + rdev->dev.coherent_dma_mask = DMA_32BIT_MASK; + + if ((rdev->pef & RIO_PEF_INB_DOORBELL) && + (rdev->dst_ops & RIO_DST_OPS_DOORBELL)) + rio_init_dbell_res(&rdev->riores[RIO_DOORBELL_RESOURCE], + 0, 0xffff); + + rio_add_device(rdev); + + out: + return rdev; +} + +/** + * rio_sport_is_active- Tests if a switch port has an active connection. + * @port: Master port to send transaction + * @destid: Associated destination ID for switch + * @hopcount: Hopcount to reach switch + * @sport: Switch port number + * + * Reads the port error status CSR for a particular switch port to + * determine if the port has an active link. Returns + * %PORT_N_ERR_STS_PORT_OK if the port is active or %0 if it is + * inactive. + */ +static int +rio_sport_is_active(struct rio_mport *port, u16 destid, u8 hopcount, int sport) +{ + u32 result; + u32 ext_ftr_ptr; + + int *entry = rio_sport_phys_table; + + do { + if ((ext_ftr_ptr = + rio_mport_get_feature(port, 0, destid, hopcount, *entry))) + + break; + } while (*++entry >= 0); + + if (ext_ftr_ptr) + rio_mport_read_config_32(port, destid, hopcount, + ext_ftr_ptr + + RIO_PORT_N_ERR_STS_CSR(sport), + &result); + + return (result & PORT_N_ERR_STS_PORT_OK); +} + +/** + * rio_route_add_entry- Add a route entry to a switch routing table + * @mport: Master port to send transaction + * @rdev: Switch device + * @table: Routing table ID + * @route_destid: Destination ID to be routed + * @route_port: Port number to be routed + * + * Calls the switch specific add_entry() method to add a route entry + * on a switch. The route table can be specified using the @table + * argument if a switch has per port routing tables or the normal + * use is to specific all tables (or the global table) by passing + * %RIO_GLOBAL_TABLE in @table. Returns %0 on success or %-EINVAL + * on failure. + */ +static int rio_route_add_entry(struct rio_mport *mport, struct rio_dev *rdev, + u16 table, u16 route_destid, u8 route_port) +{ + return rdev->rswitch->add_entry(mport, rdev->rswitch->destid, + rdev->rswitch->hopcount, table, + route_destid, route_port); +} + +/** + * rio_route_get_entry- Read a route entry in a switch routing table + * @mport: Master port to send transaction + * @rdev: Switch device + * @table: Routing table ID + * @route_destid: Destination ID to be routed + * @route_port: Pointer to read port number into + * + * Calls the switch specific get_entry() method to read a route entry + * in a switch. The route table can be specified using the @table + * argument if a switch has per port routing tables or the normal + * use is to specific all tables (or the global table) by passing + * %RIO_GLOBAL_TABLE in @table. Returns %0 on success or %-EINVAL + * on failure. + */ +static int +rio_route_get_entry(struct rio_mport *mport, struct rio_dev *rdev, u16 table, + u16 route_destid, u8 * route_port) +{ + return rdev->rswitch->get_entry(mport, rdev->rswitch->destid, + rdev->rswitch->hopcount, table, + route_destid, route_port); +} + +/** + * rio_get_host_deviceid_lock- Reads the Host Device ID Lock CSR on a device + * @port: Master port to send transaction + * @hopcount: Number of hops to the device + * + * Used during enumeration to read the Host Device ID Lock CSR on a + * RIO device. Returns the value of the lock register. + */ +static u16 rio_get_host_deviceid_lock(struct rio_mport *port, u8 hopcount) +{ + u32 result; + + rio_mport_read_config_32(port, RIO_ANY_DESTID, hopcount, + RIO_HOST_DID_LOCK_CSR, &result); + + return (u16) (result & 0xffff); +} + +/** + * rio_get_swpinfo_inport- Gets the ingress port number + * @mport: Master port to send transaction + * @destid: Destination ID associated with the switch + * @hopcount: Number of hops to the device + * + * Returns port number being used to access the switch device. + */ +static u8 +rio_get_swpinfo_inport(struct rio_mport *mport, u16 destid, u8 hopcount) +{ + u32 result; + + rio_mport_read_config_32(mport, destid, hopcount, RIO_SWP_INFO_CAR, + &result); + + return (u8) (result & 0xff); +} + +/** + * rio_get_swpinfo_tports- Gets total number of ports on the switch + * @mport: Master port to send transaction + * @destid: Destination ID associated with the switch + * @hopcount: Number of hops to the device + * + * Returns total numbers of ports implemented by the switch device. + */ +static u8 rio_get_swpinfo_tports(struct rio_mport *mport, u16 destid, + u8 hopcount) +{ + u32 result; + + rio_mport_read_config_32(mport, destid, hopcount, RIO_SWP_INFO_CAR, + &result); + + return RIO_GET_TOTAL_PORTS(result); +} + +/** + * rio_net_add_mport- Add a master port to a RIO network + * @net: RIO network + * @port: Master port to add + * + * Adds a master port to the network list of associated master + * ports.. + */ +static void rio_net_add_mport(struct rio_net *net, struct rio_mport *port) +{ + spin_lock(&rio_global_list_lock); + list_add_tail(&port->nnode, &net->mports); + spin_unlock(&rio_global_list_lock); +} + +/** + * rio_enum_peer- Recursively enumerate a RIO network through a master port + * @net: RIO network being enumerated + * @port: Master port to send transactions + * @hopcount: Number of hops into the network + * + * Recursively enumerates a RIO network. Transactions are sent via the + * master port passed in @port. + */ +static int rio_enum_peer(struct rio_net *net, struct rio_mport *port, + u8 hopcount) +{ + int port_num; + int num_ports; + int cur_destid; + struct rio_dev *rdev; + u16 destid; + int tmp; + + if (rio_get_host_deviceid_lock(port, hopcount) == port->host_deviceid) { + pr_debug("RIO: PE already discovered by this host\n"); + /* + * Already discovered by this host. Add it as another + * master port for the current network. + */ + rio_net_add_mport(net, port); + return 0; + } + + /* Attempt to acquire device lock */ + rio_mport_write_config_32(port, RIO_ANY_DESTID, hopcount, + RIO_HOST_DID_LOCK_CSR, port->host_deviceid); + while ((tmp = rio_get_host_deviceid_lock(port, hopcount)) + < port->host_deviceid) { + /* Delay a bit */ + mdelay(1); + /* Attempt to acquire device lock again */ + rio_mport_write_config_32(port, RIO_ANY_DESTID, hopcount, + RIO_HOST_DID_LOCK_CSR, + port->host_deviceid); + } + + if (rio_get_host_deviceid_lock(port, hopcount) > port->host_deviceid) { + pr_debug( + "RIO: PE locked by a higher priority host...retreating\n"); + return -1; + } + + /* Setup new RIO device */ + if ((rdev = rio_setup_device(net, port, RIO_ANY_DESTID, hopcount, 1))) { + /* Add device to the global and bus/net specific list. */ + list_add_tail(&rdev->net_list, &net->devices); + } else + return -1; + + if (rio_is_switch(rdev)) { + next_switchid++; + + for (destid = 0; destid < next_destid; destid++) { + rio_route_add_entry(port, rdev, RIO_GLOBAL_TABLE, + destid, rio_get_swpinfo_inport(port, + RIO_ANY_DESTID, + hopcount)); + rdev->rswitch->route_table[destid] = + rio_get_swpinfo_inport(port, RIO_ANY_DESTID, + hopcount); + } + + num_ports = + rio_get_swpinfo_tports(port, RIO_ANY_DESTID, hopcount); + pr_debug( + "RIO: found %s (vid %4.4x did %4.4x) with %d ports\n", + rio_name(rdev), rdev->vid, rdev->did, num_ports); + for (port_num = 0; port_num < num_ports; port_num++) { + if (rio_get_swpinfo_inport + (port, RIO_ANY_DESTID, hopcount) == port_num) + continue; + + cur_destid = next_destid; + + if (rio_sport_is_active + (port, RIO_ANY_DESTID, hopcount, port_num)) { + pr_debug( + "RIO: scanning device on port %d\n", + port_num); + rio_route_add_entry(port, rdev, + RIO_GLOBAL_TABLE, + RIO_ANY_DESTID, port_num); + + if (rio_enum_peer(net, port, hopcount + 1) < 0) + return -1; + + /* Update routing tables */ + if (next_destid > cur_destid) { + for (destid = cur_destid; + destid < next_destid; destid++) { + rio_route_add_entry(port, rdev, + RIO_GLOBAL_TABLE, + destid, + port_num); + rdev->rswitch-> + route_table[destid] = + port_num; + } + rdev->rswitch->destid = cur_destid; + } + } + } + } else + pr_debug("RIO: found %s (vid %4.4x did %4.4x)\n", + rio_name(rdev), rdev->vid, rdev->did); + + return 0; +} + +/** + * rio_enum_complete- Tests if enumeration of a network is complete + * @port: Master port to send transaction + * + * Tests the Component Tag CSR for presence of the magic enumeration + * complete flag. Return %1 if enumeration is complete or %0 if + * enumeration is incomplete. + */ +static int rio_enum_complete(struct rio_mport *port) +{ + u32 tag_csr; + int ret = 0; + + rio_local_read_config_32(port, RIO_COMPONENT_TAG_CSR, &tag_csr); + + if (tag_csr == RIO_ENUM_CMPL_MAGIC) + ret = 1; + + return ret; +} + +/** + * rio_disc_peer- Recursively discovers a RIO network through a master port + * @net: RIO network being discovered + * @port: Master port to send transactions + * @destid: Current destination ID in network + * @hopcount: Number of hops into the network + * + * Recursively discovers a RIO network. Transactions are sent via the + * master port passed in @port. + */ +static int +rio_disc_peer(struct rio_net *net, struct rio_mport *port, u16 destid, + u8 hopcount) +{ + u8 port_num, route_port; + int num_ports; + struct rio_dev *rdev; + u16 ndestid; + + /* Setup new RIO device */ + if ((rdev = rio_setup_device(net, port, destid, hopcount, 0))) { + /* Add device to the global and bus/net specific list. */ + list_add_tail(&rdev->net_list, &net->devices); + } else + return -1; + + if (rio_is_switch(rdev)) { + next_switchid++; + + /* Associated destid is how we accessed this switch */ + rdev->rswitch->destid = destid; + + num_ports = rio_get_swpinfo_tports(port, destid, hopcount); + pr_debug( + "RIO: found %s (vid %4.4x did %4.4x) with %d ports\n", + rio_name(rdev), rdev->vid, rdev->did, num_ports); + for (port_num = 0; port_num < num_ports; port_num++) { + if (rio_get_swpinfo_inport(port, destid, hopcount) == + port_num) + continue; + + if (rio_sport_is_active + (port, destid, hopcount, port_num)) { + pr_debug( + "RIO: scanning device on port %d\n", + port_num); + for (ndestid = 0; ndestid < RIO_ANY_DESTID; + ndestid++) { + rio_route_get_entry(port, rdev, + RIO_GLOBAL_TABLE, + ndestid, + &route_port); + if (route_port == port_num) + break; + } + + if (rio_disc_peer + (net, port, ndestid, hopcount + 1) < 0) + return -1; + } + } + } else + pr_debug("RIO: found %s (vid %4.4x did %4.4x)\n", + rio_name(rdev), rdev->vid, rdev->did); + + return 0; +} + +/** + * rio_mport_is_active- Tests if master port link is active + * @port: Master port to test + * + * Reads the port error status CSR for the master port to + * determine if the port has an active link. Returns + * %PORT_N_ERR_STS_PORT_OK if the master port is active + * or %0 if it is inactive. + */ +static int rio_mport_is_active(struct rio_mport *port) +{ + u32 result = 0; + u32 ext_ftr_ptr; + int *entry = rio_mport_phys_table; + + do { + if ((ext_ftr_ptr = + rio_mport_get_feature(port, 1, 0, 0, *entry))) + break; + } while (*++entry >= 0); + + if (ext_ftr_ptr) + rio_local_read_config_32(port, + ext_ftr_ptr + + RIO_PORT_N_ERR_STS_CSR(port->index), + &result); + + return (result & PORT_N_ERR_STS_PORT_OK); +} + +/** + * rio_alloc_net- Allocate and configure a new RIO network + * @port: Master port associated with the RIO network + * + * Allocates a RIO network structure, initializes per-network + * list heads, and adds the associated master port to the + * network list of associated master ports. Returns a + * RIO network pointer on success or %NULL on failure. + */ +static struct rio_net __devinit *rio_alloc_net(struct rio_mport *port) +{ + struct rio_net *net; + + net = kmalloc(sizeof(struct rio_net), GFP_KERNEL); + if (net) { + memset(net, 0, sizeof(struct rio_net)); + INIT_LIST_HEAD(&net->node); + INIT_LIST_HEAD(&net->devices); + INIT_LIST_HEAD(&net->mports); + list_add_tail(&port->nnode, &net->mports); + net->hport = port; + net->id = next_net++; + } + return net; +} + +/** + * rio_enum_mport- Start enumeration through a master port + * @mport: Master port to send transactions + * + * Starts the enumeration process. If somebody has enumerated our + * master port device, then give up. If not and we have an active + * link, then start recursive peer enumeration. Returns %0 if + * enumeration succeeds or %-EBUSY if enumeration fails. + */ +int rio_enum_mport(struct rio_mport *mport) +{ + struct rio_net *net = NULL; + int rc = 0; + + printk(KERN_INFO "RIO: enumerate master port %d, %s\n", mport->id, + mport->name); + /* If somebody else enumerated our master port device, bail. */ + if (rio_enum_host(mport) < 0) { + printk(KERN_INFO + "RIO: master port %d device has been enumerated by a remote host\n", + mport->id); + rc = -EBUSY; + goto out; + } + + /* If master port has an active link, allocate net and enum peers */ + if (rio_mport_is_active(mport)) { + if (!(net = rio_alloc_net(mport))) { + printk(KERN_ERR "RIO: failed to allocate new net\n"); + rc = -ENOMEM; + goto out; + } + if (rio_enum_peer(net, mport, 0) < 0) { + /* A higher priority host won enumeration, bail. */ + printk(KERN_INFO + "RIO: master port %d device has lost enumeration to a remote host\n", + mport->id); + rio_clear_locks(mport); + rc = -EBUSY; + goto out; + } + rio_clear_locks(mport); + } else { + printk(KERN_INFO "RIO: master port %d link inactive\n", + mport->id); + rc = -EINVAL; + } + + out: + return rc; +} + +/** + * rio_build_route_tables- Generate route tables from switch route entries + * + * For each switch device, generate a route table by copying existing + * route entries from the switch. + */ +static void rio_build_route_tables(void) +{ + struct rio_dev *rdev; + int i; + u8 sport; + + list_for_each_entry(rdev, &rio_devices, global_list) + if (rio_is_switch(rdev)) + for (i = 0; i < RIO_MAX_ROUTE_ENTRIES; i++) { + if (rio_route_get_entry + (rdev->net->hport, rdev, RIO_GLOBAL_TABLE, i, + &sport) < 0) + continue; + rdev->rswitch->route_table[i] = sport; + } +} + +/** + * rio_enum_timeout- Signal that enumeration timed out + * @data: Address of timeout flag. + * + * When the enumeration complete timer expires, set a flag that + * signals to the discovery process that enumeration did not + * complete in a sane amount of time. + */ +static void rio_enum_timeout(unsigned long data) +{ + /* Enumeration timed out, set flag */ + *(int *)data = 1; +} + +/** + * rio_disc_mport- Start discovery through a master port + * @mport: Master port to send transactions + * + * Starts the discovery process. If we have an active link, + * then wait for the signal that enumeration is complete. + * When enumeration completion is signaled, start recursive + * peer discovery. Returns %0 if discovery succeeds or %-EBUSY + * on failure. + */ +int rio_disc_mport(struct rio_mport *mport) +{ + struct rio_net *net = NULL; + int enum_timeout_flag = 0; + + printk(KERN_INFO "RIO: discover master port %d, %s\n", mport->id, + mport->name); + + /* If master port has an active link, allocate net and discover peers */ + if (rio_mport_is_active(mport)) { + if (!(net = rio_alloc_net(mport))) { + printk(KERN_ERR "RIO: Failed to allocate new net\n"); + goto bail; + } + + pr_debug("RIO: wait for enumeration complete..."); + + rio_enum_timer.expires = + jiffies + CONFIG_RAPIDIO_DISC_TIMEOUT * HZ; + rio_enum_timer.data = (unsigned long)&enum_timeout_flag; + add_timer(&rio_enum_timer); + while (!rio_enum_complete(mport)) { + mdelay(1); + if (enum_timeout_flag) { + del_timer_sync(&rio_enum_timer); + goto timeout; + } + } + del_timer_sync(&rio_enum_timer); + + pr_debug("done\n"); + if (rio_disc_peer(net, mport, RIO_ANY_DESTID, 0) < 0) { + printk(KERN_INFO + "RIO: master port %d device has failed discovery\n", + mport->id); + goto bail; + } + + rio_build_route_tables(); + } + + return 0; + + timeout: + pr_debug("timeout\n"); + bail: + return -EBUSY; +} diff --git a/drivers/rapidio/rio-sysfs.c b/drivers/rapidio/rio-sysfs.c new file mode 100644 index 00000000000..30a11436e24 --- /dev/null +++ b/drivers/rapidio/rio-sysfs.c @@ -0,0 +1,230 @@ +/* + * RapidIO sysfs attributes and support + * + * Copyright 2005 MontaVista Software, Inc. + * Matt Porter <mporter@kernel.crashing.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/config.h> +#include <linux/kernel.h> +#include <linux/rio.h> +#include <linux/rio_drv.h> +#include <linux/stat.h> + +#include "rio.h" + +/* Sysfs support */ +#define rio_config_attr(field, format_string) \ +static ssize_t \ +field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ +{ \ + struct rio_dev *rdev = to_rio_dev(dev); \ + \ + return sprintf(buf, format_string, rdev->field); \ +} \ + +rio_config_attr(did, "0x%04x\n"); +rio_config_attr(vid, "0x%04x\n"); +rio_config_attr(device_rev, "0x%08x\n"); +rio_config_attr(asm_did, "0x%04x\n"); +rio_config_attr(asm_vid, "0x%04x\n"); +rio_config_attr(asm_rev, "0x%04x\n"); + +static ssize_t routes_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct rio_dev *rdev = to_rio_dev(dev); + char *str = buf; + int i; + + if (!rdev->rswitch) + goto out; + + for (i = 0; i < RIO_MAX_ROUTE_ENTRIES; i++) { + if (rdev->rswitch->route_table[i] == RIO_INVALID_ROUTE) + continue; + str += + sprintf(str, "%04x %02x\n", i, + rdev->rswitch->route_table[i]); + } + + out: + return (str - buf); +} + +struct device_attribute rio_dev_attrs[] = { + __ATTR_RO(did), + __ATTR_RO(vid), + __ATTR_RO(device_rev), + __ATTR_RO(asm_did), + __ATTR_RO(asm_vid), + __ATTR_RO(asm_rev), + __ATTR_RO(routes), + __ATTR_NULL, +}; + +static ssize_t +rio_read_config(struct kobject *kobj, char *buf, loff_t off, size_t count) +{ + struct rio_dev *dev = + to_rio_dev(container_of(kobj, struct device, kobj)); + unsigned int size = 0x100; + loff_t init_off = off; + u8 *data = (u8 *) buf; + + /* Several chips lock up trying to read undefined config space */ + if (capable(CAP_SYS_ADMIN)) + size = 0x200000; + + if (off > size) + return 0; + if (off + count > size) { + size -= off; + count = size; + } else { + size = count; + } + + if ((off & 1) && size) { + u8 val; + rio_read_config_8(dev, off, &val); + data[off - init_off] = val; + off++; + size--; + } + + if ((off & 3) && size > 2) { + u16 val; + rio_read_config_16(dev, off, &val); + data[off - init_off] = (val >> 8) & 0xff; + data[off - init_off + 1] = val & 0xff; + off += 2; + size -= 2; + } + + while (size > 3) { + u32 val; + rio_read_config_32(dev, off, &val); + data[off - init_off] = (val >> 24) & 0xff; + data[off - init_off + 1] = (val >> 16) & 0xff; + data[off - init_off + 2] = (val >> 8) & 0xff; + data[off - init_off + 3] = val & 0xff; + off += 4; + size -= 4; + } + + if (size >= 2) { + u16 val; + rio_read_config_16(dev, off, &val); + data[off - init_off] = (val >> 8) & 0xff; + data[off - init_off + 1] = val & 0xff; + off += 2; + size -= 2; + } + + if (size > 0) { + u8 val; + rio_read_config_8(dev, off, &val); + data[off - init_off] = val; + off++; + --size; + } + + return count; +} + +static ssize_t +rio_write_config(struct kobject *kobj, char *buf, loff_t off, size_t count) +{ + struct rio_dev *dev = + to_rio_dev(container_of(kobj, struct device, kobj)); + unsigned int size = count; + loff_t init_off = off; + u8 *data = (u8 *) buf; + + if (off > 0x200000) + return 0; + if (off + count > 0x200000) { + size = 0x200000 - off; + count = size; + } + + if ((off & 1) && size) { + rio_write_config_8(dev, off, data[off - init_off]); + off++; + size--; + } + + if ((off & 3) && (size > 2)) { + u16 val = data[off - init_off + 1]; + val |= (u16) data[off - init_off] << 8; + rio_write_config_16(dev, off, val); + off += 2; + size -= 2; + } + + while (size > 3) { + u32 val = data[off - init_off + 3]; + val |= (u32) data[off - init_off + 2] << 8; + val |= (u32) data[off - init_off + 1] << 16; + val |= (u32) data[off - init_off] << 24; + rio_write_config_32(dev, off, val); + off += 4; + size -= 4; + } + + if (size >= 2) { + u16 val = data[off - init_off + 1]; + val |= (u16) data[off - init_off] << 8; + rio_write_config_16(dev, off, val); + off += 2; + size -= 2; + } + + if (size) { + rio_write_config_8(dev, off, data[off - init_off]); + off++; + --size; + } + + return count; +} + +static struct bin_attribute rio_config_attr = { + .attr = { + .name = "config", + .mode = S_IRUGO | S_IWUSR, + .owner = THIS_MODULE, + }, + .size = 0x200000, + .read = rio_read_config, + .write = rio_write_config, +}; + +/** + * rio_create_sysfs_dev_files - create RIO specific sysfs files + * @rdev: device whose entries should be created + * + * Create files when @rdev is added to sysfs. + */ +int rio_create_sysfs_dev_files(struct rio_dev *rdev) +{ + sysfs_create_bin_file(&rdev->dev.kobj, &rio_config_attr); + + return 0; +} + +/** + * rio_remove_sysfs_dev_files - cleanup RIO specific sysfs files + * @rdev: device whose entries we should free + * + * Cleanup when @rdev is removed from sysfs. + */ +void rio_remove_sysfs_dev_files(struct rio_dev *rdev) +{ + sysfs_remove_bin_file(&rdev->dev.kobj, &rio_config_attr); +} diff --git a/drivers/rapidio/rio.c b/drivers/rapidio/rio.c new file mode 100644 index 00000000000..3ca1011ceaa --- /dev/null +++ b/drivers/rapidio/rio.c @@ -0,0 +1,510 @@ +/* + * RapidIO interconnect services + * (RapidIO Interconnect Specification, http://www.rapidio.org) + * + * Copyright 2005 MontaVista Software, Inc. + * Matt Porter <mporter@kernel.crashing.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/config.h> +#include <linux/types.h> +#include <linux/kernel.h> + +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/rio.h> +#include <linux/rio_drv.h> +#include <linux/rio_ids.h> +#include <linux/rio_regs.h> +#include <linux/module.h> +#include <linux/spinlock.h> + +#include "rio.h" + +static LIST_HEAD(rio_mports); + +/** + * rio_local_get_device_id - Get the base/extended device id for a port + * @port: RIO master port from which to get the deviceid + * + * Reads the base/extended device id from the local device + * implementing the master port. Returns the 8/16-bit device + * id. + */ +u16 rio_local_get_device_id(struct rio_mport *port) +{ + u32 result; + + rio_local_read_config_32(port, RIO_DID_CSR, &result); + + return (RIO_GET_DID(result)); +} + +/** + * rio_request_inb_mbox - request inbound mailbox service + * @mport: RIO master port from which to allocate the mailbox resource + * @dev_id: Device specific pointer to pass on event + * @mbox: Mailbox number to claim + * @entries: Number of entries in inbound mailbox queue + * @minb: Callback to execute when inbound message is received + * + * Requests ownership of an inbound mailbox resource and binds + * a callback function to the resource. Returns %0 on success. + */ +int rio_request_inb_mbox(struct rio_mport *mport, + void *dev_id, + int mbox, + int entries, + void (*minb) (struct rio_mport * mport, void *dev_id, int mbox, + int slot)) +{ + int rc = 0; + + struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); + + if (res) { + rio_init_mbox_res(res, mbox, mbox); + + /* Make sure this mailbox isn't in use */ + if ((rc = + request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE], + res)) < 0) { + kfree(res); + goto out; + } + + mport->inb_msg[mbox].res = res; + + /* Hook the inbound message callback */ + mport->inb_msg[mbox].mcback = minb; + + rc = rio_open_inb_mbox(mport, dev_id, mbox, entries); + } else + rc = -ENOMEM; + + out: + return rc; +} + +/** + * rio_release_inb_mbox - release inbound mailbox message service + * @mport: RIO master port from which to release the mailbox resource + * @mbox: Mailbox number to release + * + * Releases ownership of an inbound mailbox resource. Returns 0 + * if the request has been satisfied. + */ +int rio_release_inb_mbox(struct rio_mport *mport, int mbox) +{ + rio_close_inb_mbox(mport, mbox); + + /* Release the mailbox resource */ + return release_resource(mport->inb_msg[mbox].res); +} + +/** + * rio_request_outb_mbox - request outbound mailbox service + * @mport: RIO master port from which to allocate the mailbox resource + * @dev_id: Device specific pointer to pass on event + * @mbox: Mailbox number to claim + * @entries: Number of entries in outbound mailbox queue + * @moutb: Callback to execute when outbound message is sent + * + * Requests ownership of an outbound mailbox resource and binds + * a callback function to the resource. Returns 0 on success. + */ +int rio_request_outb_mbox(struct rio_mport *mport, + void *dev_id, + int mbox, + int entries, + void (*moutb) (struct rio_mport * mport, void *dev_id, int mbox, int slot)) +{ + int rc = 0; + + struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); + + if (res) { + rio_init_mbox_res(res, mbox, mbox); + + /* Make sure this outbound mailbox isn't in use */ + if ((rc = + request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE], + res)) < 0) { + kfree(res); + goto out; + } + + mport->outb_msg[mbox].res = res; + + /* Hook the inbound message callback */ + mport->outb_msg[mbox].mcback = moutb; + + rc = rio_open_outb_mbox(mport, dev_id, mbox, entries); + } else + rc = -ENOMEM; + + out: + return rc; +} + +/** + * rio_release_outb_mbox - release outbound mailbox message service + * @mport: RIO master port from which to release the mailbox resource + * @mbox: Mailbox number to release + * + * Releases ownership of an inbound mailbox resource. Returns 0 + * if the request has been satisfied. + */ +int rio_release_outb_mbox(struct rio_mport *mport, int mbox) +{ + rio_close_outb_mbox(mport, mbox); + + /* Release the mailbox resource */ + return release_resource(mport->outb_msg[mbox].res); +} + +/** + * rio_setup_inb_dbell - bind inbound doorbell callback + * @mport: RIO master port to bind the doorbell callback + * @dev_id: Device specific pointer to pass on event + * @res: Doorbell message resource + * @dinb: Callback to execute when doorbell is received + * + * Adds a doorbell resource/callback pair into a port's + * doorbell event list. Returns 0 if the request has been + * satisfied. + */ +static int +rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res, + void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, u16 dst, + u16 info)) +{ + int rc = 0; + struct rio_dbell *dbell; + + if (!(dbell = kmalloc(sizeof(struct rio_dbell), GFP_KERNEL))) { + rc = -ENOMEM; + goto out; + } + + dbell->res = res; + dbell->dinb = dinb; + dbell->dev_id = dev_id; + + list_add_tail(&dbell->node, &mport->dbells); + + out: + return rc; +} + +/** + * rio_request_inb_dbell - request inbound doorbell message service + * @mport: RIO master port from which to allocate the doorbell resource + * @dev_id: Device specific pointer to pass on event + * @start: Doorbell info range start + * @end: Doorbell info range end + * @dinb: Callback to execute when doorbell is received + * + * Requests ownership of an inbound doorbell resource and binds + * a callback function to the resource. Returns 0 if the request + * has been satisfied. + */ +int rio_request_inb_dbell(struct rio_mport *mport, + void *dev_id, + u16 start, + u16 end, + void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, + u16 dst, u16 info)) +{ + int rc = 0; + + struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); + + if (res) { + rio_init_dbell_res(res, start, end); + + /* Make sure these doorbells aren't in use */ + if ((rc = + request_resource(&mport->riores[RIO_DOORBELL_RESOURCE], + res)) < 0) { + kfree(res); + goto out; + } + + /* Hook the doorbell callback */ + rc = rio_setup_inb_dbell(mport, dev_id, res, dinb); + } else + rc = -ENOMEM; + + out: + return rc; +} + +/** + * rio_release_inb_dbell - release inbound doorbell message service + * @mport: RIO master port from which to release the doorbell resource + * @start: Doorbell info range start + * @end: Doorbell info range end + * + * Releases ownership of an inbound doorbell resource and removes + * callback from the doorbell event list. Returns 0 if the request + * has been satisfied. + */ +int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end) +{ + int rc = 0, found = 0; + struct rio_dbell *dbell; + + list_for_each_entry(dbell, &mport->dbells, node) { + if ((dbell->res->start == start) && (dbell->res->end == end)) { + found = 1; + break; + } + } + + /* If we can't find an exact match, fail */ + if (!found) { + rc = -EINVAL; + goto out; + } + + /* Delete from list */ + list_del(&dbell->node); + + /* Release the doorbell resource */ + rc = release_resource(dbell->res); + + /* Free the doorbell event */ + kfree(dbell); + + out: + return rc; +} + +/** + * rio_request_outb_dbell - request outbound doorbell message range + * @rdev: RIO device from which to allocate the doorbell resource + * @start: Doorbell message range start + * @end: Doorbell message range end + * + * Requests ownership of a doorbell message range. Returns a resource + * if the request has been satisfied or %NULL on failure. + */ +struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start, + u16 end) +{ + struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); + + if (res) { + rio_init_dbell_res(res, start, end); + + /* Make sure these doorbells aren't in use */ + if (request_resource(&rdev->riores[RIO_DOORBELL_RESOURCE], res) + < 0) { + kfree(res); + res = NULL; + } + } + + return res; +} + +/** + * rio_release_outb_dbell - release outbound doorbell message range + * @rdev: RIO device from which to release the doorbell resource + * @res: Doorbell resource to be freed + * + * Releases ownership of a doorbell message range. Returns 0 if the + * request has been satisfied. + */ +int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res) +{ + int rc = release_resource(res); + + kfree(res); + + return rc; +} + +/** + * rio_mport_get_feature - query for devices' extended features + * @port: Master port to issue transaction + * @local: Indicate a local master port or remote device access + * @destid: Destination ID of the device + * @hopcount: Number of switch hops to the device + * @ftr: Extended feature code + * + * Tell if a device supports a given RapidIO capability. + * Returns the offset of the requested extended feature + * block within the device's RIO configuration space or + * 0 in case the device does not support it. Possible + * values for @ftr: + * + * %RIO_EFB_PAR_EP_ID LP/LVDS EP Devices + * + * %RIO_EFB_PAR_EP_REC_ID LP/LVDS EP Recovery Devices + * + * %RIO_EFB_PAR_EP_FREE_ID LP/LVDS EP Free Devices + * + * %RIO_EFB_SER_EP_ID LP/Serial EP Devices + * + * %RIO_EFB_SER_EP_REC_ID LP/Serial EP Recovery Devices + * + * %RIO_EFB_SER_EP_FREE_ID LP/Serial EP Free Devices + */ +u32 +rio_mport_get_feature(struct rio_mport * port, int local, u16 destid, + u8 hopcount, int ftr) +{ + u32 asm_info, ext_ftr_ptr, ftr_header; + + if (local) + rio_local_read_config_32(port, RIO_ASM_INFO_CAR, &asm_info); + else + rio_mport_read_config_32(port, destid, hopcount, + RIO_ASM_INFO_CAR, &asm_info); + + ext_ftr_ptr = asm_info & RIO_EXT_FTR_PTR_MASK; + + while (ext_ftr_ptr) { + if (local) + rio_local_read_config_32(port, ext_ftr_ptr, + &ftr_header); + else + rio_mport_read_config_32(port, destid, hopcount, + ext_ftr_ptr, &ftr_header); + if (RIO_GET_BLOCK_ID(ftr_header) == ftr) + return ext_ftr_ptr; + if (!(ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header))) + break; + } + + return 0; +} + +/** + * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_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 + * @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids + * @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_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, @did, @asm_vid, @asm_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_asm(u16 vid, u16 did, + u16 asm_vid, u16 asm_did, struct rio_dev *from) +{ + struct list_head *n; + struct rio_dev *rdev; + + WARN_ON(in_interrupt()); + 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); diff --git a/drivers/rapidio/rio.h b/drivers/rapidio/rio.h new file mode 100644 index 00000000000..b242cee656e --- /dev/null +++ b/drivers/rapidio/rio.h @@ -0,0 +1,60 @@ +/* + * RapidIO interconnect services + * + * Copyright 2005 MontaVista Software, Inc. + * Matt Porter <mporter@kernel.crashing.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/device.h> +#include <linux/list.h> +#include <linux/rio.h> + +/* Functions internal to the RIO core code */ + +extern u32 rio_mport_get_feature(struct rio_mport *mport, int local, u16 destid, + u8 hopcount, int ftr); +extern int rio_create_sysfs_dev_files(struct rio_dev *rdev); +extern int rio_enum_mport(struct rio_mport *mport); +extern int rio_disc_mport(struct rio_mport *mport); + +/* Structures internal to the RIO core code */ +extern struct device_attribute rio_dev_attrs[]; +extern spinlock_t rio_global_list_lock; + +extern struct rio_route_ops __start_rio_route_ops[]; +extern struct rio_route_ops __end_rio_route_ops[]; + +/* Helpers internal to the RIO core code */ +#define DECLARE_RIO_ROUTE_SECTION(section, vid, did, add_hook, get_hook) \ + static struct rio_route_ops __rio_route_ops __attribute_used__ \ + __attribute__((__section__(#section))) = { vid, did, add_hook, get_hook }; + +/** + * DECLARE_RIO_ROUTE_OPS - Registers switch routing operations + * @vid: RIO vendor ID + * @did: RIO device ID + * @add_hook: Callback that adds a route entry + * @get_hook: Callback that gets a route entry + * + * Manipulating switch route tables in RIO is switch specific. This + * registers a switch by vendor and device ID with two callbacks for + * modifying and retrieving route entries in a switch. A &struct + * rio_route_ops is initialized with the ops and placed into a + * RIO-specific kernel section. + */ +#define DECLARE_RIO_ROUTE_OPS(vid, did, add_hook, get_hook) \ + DECLARE_RIO_ROUTE_SECTION(.rio_route_ops, \ + vid, did, add_hook, get_hook) + +#ifdef CONFIG_RAPIDIO_8_BIT_TRANSPORT +#define RIO_GET_DID(x) ((x & 0x00ff0000) >> 16) +#define RIO_SET_DID(x) ((x & 0x000000ff) << 16) +#else +#define RIO_GET_DID(x) (x & 0xffff) +#define RIO_SET_DID(x) (x & 0xffff) +#endif diff --git a/drivers/rapidio/switches/Makefile b/drivers/rapidio/switches/Makefile new file mode 100644 index 00000000000..b924f830176 --- /dev/null +++ b/drivers/rapidio/switches/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for RIO switches +# + +obj-$(CONFIG_RAPIDIO) += tsi500.o diff --git a/drivers/rapidio/switches/tsi500.c b/drivers/rapidio/switches/tsi500.c new file mode 100644 index 00000000000..c77c23bd984 --- /dev/null +++ b/drivers/rapidio/switches/tsi500.c @@ -0,0 +1,60 @@ +/* + * RapidIO Tsi500 switch support + * + * Copyright 2005 MontaVista Software, Inc. + * Matt Porter <mporter@kernel.crashing.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/rio.h> +#include <linux/rio_drv.h> +#include <linux/rio_ids.h> +#include "../rio.h" + +static int +tsi500_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount, u16 table, u16 route_destid, u8 route_port) +{ + int i; + u32 offset = 0x10000 + 0xa00 + ((route_destid / 2)&~0x3); + u32 result; + + if (table == 0xff) { + rio_mport_read_config_32(mport, destid, hopcount, offset, &result); + result &= ~(0xf << (4*(route_destid & 0x7))); + for (i=0;i<4;i++) + rio_mport_write_config_32(mport, destid, hopcount, offset + (0x20000*i), result | (route_port << (4*(route_destid & 0x7)))); + } + else { + rio_mport_read_config_32(mport, destid, hopcount, offset + (0x20000*table), &result); + result &= ~(0xf << (4*(route_destid & 0x7))); + rio_mport_write_config_32(mport, destid, hopcount, offset + (0x20000*table), result | (route_port << (4*(route_destid & 0x7)))); + } + + return 0; +} + +static int +tsi500_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount, u16 table, u16 route_destid, u8 *route_port) +{ + int ret = 0; + u32 offset = 0x10000 + 0xa00 + ((route_destid / 2)&~0x3); + u32 result; + + if (table == 0xff) + rio_mport_read_config_32(mport, destid, hopcount, offset, &result); + else + rio_mport_read_config_32(mport, destid, hopcount, offset + (0x20000*table), &result); + + result &= 0xf << (4*(route_destid & 0x7)); + *route_port = result >> (4*(route_destid & 0x7)); + if (*route_port > 3) + ret = -1; + + return ret; +} + +DECLARE_RIO_ROUTE_OPS(RIO_VID_TUNDRA, RIO_DID_TSI500, tsi500_route_add_entry, tsi500_route_get_entry); |