1eb188d0eSMatt Porter /* 2eb188d0eSMatt Porter * RapidIO enumeration and discovery support 3eb188d0eSMatt Porter * 4eb188d0eSMatt Porter * Copyright 2005 MontaVista Software, Inc. 5eb188d0eSMatt Porter * Matt Porter <mporter@kernel.crashing.org> 6eb188d0eSMatt Porter * 7e5cabeb3SAlexandre Bounine * Copyright 2009 Integrated Device Technology, Inc. 8e5cabeb3SAlexandre Bounine * Alex Bounine <alexandre.bounine@idt.com> 9e5cabeb3SAlexandre Bounine * - Added Port-Write/Error Management initialization and handling 10e5cabeb3SAlexandre Bounine * 11933af4a6SThomas Moll * Copyright 2009 Sysgo AG 12933af4a6SThomas Moll * Thomas Moll <thomas.moll@sysgo.com> 13933af4a6SThomas Moll * - Added Input- Output- enable functionality, to allow full communication 14933af4a6SThomas Moll * 15eb188d0eSMatt Porter * This program is free software; you can redistribute it and/or modify it 16eb188d0eSMatt Porter * under the terms of the GNU General Public License as published by the 17eb188d0eSMatt Porter * Free Software Foundation; either version 2 of the License, or (at your 18eb188d0eSMatt Porter * option) any later version. 19eb188d0eSMatt Porter */ 20eb188d0eSMatt Porter 21eb188d0eSMatt Porter #include <linux/types.h> 22eb188d0eSMatt Porter #include <linux/kernel.h> 23eb188d0eSMatt Porter 24eb188d0eSMatt Porter #include <linux/delay.h> 25fa78cc51SMatt Porter #include <linux/dma-mapping.h> 26eb188d0eSMatt Porter #include <linux/init.h> 27eb188d0eSMatt Porter #include <linux/rio.h> 28eb188d0eSMatt Porter #include <linux/rio_drv.h> 29eb188d0eSMatt Porter #include <linux/rio_ids.h> 30eb188d0eSMatt Porter #include <linux/rio_regs.h> 31eb188d0eSMatt Porter #include <linux/module.h> 32eb188d0eSMatt Porter #include <linux/spinlock.h> 33eb188d0eSMatt Porter #include <linux/timer.h> 34de25968cSTim Schmielau #include <linux/jiffies.h> 35de25968cSTim Schmielau #include <linux/slab.h> 36eb188d0eSMatt Porter 37eb188d0eSMatt Porter #include "rio.h" 38eb188d0eSMatt Porter 39eb188d0eSMatt Porter LIST_HEAD(rio_devices); 40eb188d0eSMatt Porter static LIST_HEAD(rio_switches); 41eb188d0eSMatt Porter 42eb188d0eSMatt Porter static void rio_enum_timeout(unsigned long); 43eb188d0eSMatt Porter 44e5cabeb3SAlexandre Bounine static void rio_init_em(struct rio_dev *rdev); 45e5cabeb3SAlexandre Bounine 46fa78cc51SMatt Porter DEFINE_SPINLOCK(rio_global_list_lock); 47fa78cc51SMatt Porter 48eb188d0eSMatt Porter static int next_destid = 0; 49eb188d0eSMatt Porter static int next_switchid = 0; 50eb188d0eSMatt Porter static int next_net = 0; 51e5cabeb3SAlexandre Bounine static int next_comptag; 52eb188d0eSMatt Porter 53eb188d0eSMatt Porter static struct timer_list rio_enum_timer = 54eb188d0eSMatt Porter TIMER_INITIALIZER(rio_enum_timeout, 0, 0); 55eb188d0eSMatt Porter 56eb188d0eSMatt Porter static int rio_mport_phys_table[] = { 57eb188d0eSMatt Porter RIO_EFB_PAR_EP_ID, 58eb188d0eSMatt Porter RIO_EFB_PAR_EP_REC_ID, 59eb188d0eSMatt Porter RIO_EFB_SER_EP_ID, 60eb188d0eSMatt Porter RIO_EFB_SER_EP_REC_ID, 61eb188d0eSMatt Porter -1, 62eb188d0eSMatt Porter }; 63eb188d0eSMatt Porter 64eb188d0eSMatt Porter /** 65eb188d0eSMatt Porter * rio_get_device_id - Get the base/extended device id for a device 66eb188d0eSMatt Porter * @port: RIO master port 67eb188d0eSMatt Porter * @destid: Destination ID of device 68eb188d0eSMatt Porter * @hopcount: Hopcount to device 69eb188d0eSMatt Porter * 70eb188d0eSMatt Porter * Reads the base/extended device id from a device. Returns the 71eb188d0eSMatt Porter * 8/16-bit device ID. 72eb188d0eSMatt Porter */ 73eb188d0eSMatt Porter static u16 rio_get_device_id(struct rio_mport *port, u16 destid, u8 hopcount) 74eb188d0eSMatt Porter { 75eb188d0eSMatt Porter u32 result; 76eb188d0eSMatt Porter 77eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, RIO_DID_CSR, &result); 78eb188d0eSMatt Porter 79e0423236SZhang Wei return RIO_GET_DID(port->sys_size, result); 80eb188d0eSMatt Porter } 81eb188d0eSMatt Porter 82eb188d0eSMatt Porter /** 83eb188d0eSMatt Porter * rio_set_device_id - Set the base/extended device id for a device 84eb188d0eSMatt Porter * @port: RIO master port 85eb188d0eSMatt Porter * @destid: Destination ID of device 86eb188d0eSMatt Porter * @hopcount: Hopcount to device 87eb188d0eSMatt Porter * @did: Device ID value to be written 88eb188d0eSMatt Porter * 89eb188d0eSMatt Porter * Writes the base/extended device id from a device. 90eb188d0eSMatt Porter */ 91fa78cc51SMatt Porter static void rio_set_device_id(struct rio_mport *port, u16 destid, u8 hopcount, u16 did) 92eb188d0eSMatt Porter { 93eb188d0eSMatt Porter rio_mport_write_config_32(port, destid, hopcount, RIO_DID_CSR, 94e0423236SZhang Wei RIO_SET_DID(port->sys_size, did)); 95eb188d0eSMatt Porter } 96eb188d0eSMatt Porter 97eb188d0eSMatt Porter /** 98eb188d0eSMatt Porter * rio_local_set_device_id - Set the base/extended device id for a port 99eb188d0eSMatt Porter * @port: RIO master port 100eb188d0eSMatt Porter * @did: Device ID value to be written 101eb188d0eSMatt Porter * 102eb188d0eSMatt Porter * Writes the base/extended device id from a device. 103eb188d0eSMatt Porter */ 104eb188d0eSMatt Porter static void rio_local_set_device_id(struct rio_mport *port, u16 did) 105eb188d0eSMatt Porter { 106e0423236SZhang Wei rio_local_write_config_32(port, RIO_DID_CSR, RIO_SET_DID(port->sys_size, 107e0423236SZhang Wei did)); 108eb188d0eSMatt Porter } 109eb188d0eSMatt Porter 110eb188d0eSMatt Porter /** 111eb188d0eSMatt Porter * rio_clear_locks- Release all host locks and signal enumeration complete 112eb188d0eSMatt Porter * @port: Master port to issue transaction 113eb188d0eSMatt Porter * 114eb188d0eSMatt Porter * Marks the component tag CSR on each device with the enumeration 115eb188d0eSMatt Porter * complete flag. When complete, it then release the host locks on 116eb188d0eSMatt Porter * each device. Returns 0 on success or %-EINVAL on failure. 117eb188d0eSMatt Porter */ 118eb188d0eSMatt Porter static int rio_clear_locks(struct rio_mport *port) 119eb188d0eSMatt Porter { 120eb188d0eSMatt Porter struct rio_dev *rdev; 121eb188d0eSMatt Porter u32 result; 122eb188d0eSMatt Porter int ret = 0; 123eb188d0eSMatt Porter 124e5cabeb3SAlexandre Bounine /* Assign component tag to all devices */ 125e5cabeb3SAlexandre Bounine next_comptag = 1; 126e5cabeb3SAlexandre Bounine rio_local_write_config_32(port, RIO_COMPONENT_TAG_CSR, next_comptag++); 127e5cabeb3SAlexandre Bounine 128e5cabeb3SAlexandre Bounine list_for_each_entry(rdev, &rio_devices, global_list) { 129e5cabeb3SAlexandre Bounine /* Mark device as discovered */ 130e5cabeb3SAlexandre Bounine rio_read_config_32(rdev, 131e5cabeb3SAlexandre Bounine rdev->phys_efptr + RIO_PORT_GEN_CTL_CSR, 132e5cabeb3SAlexandre Bounine &result); 133e5cabeb3SAlexandre Bounine rio_write_config_32(rdev, 134e5cabeb3SAlexandre Bounine rdev->phys_efptr + RIO_PORT_GEN_CTL_CSR, 135e5cabeb3SAlexandre Bounine result | RIO_PORT_GEN_DISCOVERED); 136e5cabeb3SAlexandre Bounine 137e5cabeb3SAlexandre Bounine rio_write_config_32(rdev, RIO_COMPONENT_TAG_CSR, next_comptag); 138e5cabeb3SAlexandre Bounine rdev->comp_tag = next_comptag++; 139e5cabeb3SAlexandre Bounine if (next_comptag >= 0x10000) { 140e5cabeb3SAlexandre Bounine pr_err("RIO: Component Tag Counter Overflow\n"); 141e5cabeb3SAlexandre Bounine break; 142e5cabeb3SAlexandre Bounine } 143e5cabeb3SAlexandre Bounine } 144eb188d0eSMatt Porter 145eb188d0eSMatt Porter /* Release host device id locks */ 146eb188d0eSMatt Porter rio_local_write_config_32(port, RIO_HOST_DID_LOCK_CSR, 147eb188d0eSMatt Porter port->host_deviceid); 148eb188d0eSMatt Porter rio_local_read_config_32(port, RIO_HOST_DID_LOCK_CSR, &result); 149eb188d0eSMatt Porter if ((result & 0xffff) != 0xffff) { 150eb188d0eSMatt Porter printk(KERN_INFO 151eb188d0eSMatt Porter "RIO: badness when releasing host lock on master port, result %8.8x\n", 152eb188d0eSMatt Porter result); 153eb188d0eSMatt Porter ret = -EINVAL; 154eb188d0eSMatt Porter } 155eb188d0eSMatt Porter list_for_each_entry(rdev, &rio_devices, global_list) { 156eb188d0eSMatt Porter rio_write_config_32(rdev, RIO_HOST_DID_LOCK_CSR, 157eb188d0eSMatt Porter port->host_deviceid); 158eb188d0eSMatt Porter rio_read_config_32(rdev, RIO_HOST_DID_LOCK_CSR, &result); 159eb188d0eSMatt Porter if ((result & 0xffff) != 0xffff) { 160eb188d0eSMatt Porter printk(KERN_INFO 161eb188d0eSMatt Porter "RIO: badness when releasing host lock on vid %4.4x did %4.4x\n", 162eb188d0eSMatt Porter rdev->vid, rdev->did); 163eb188d0eSMatt Porter ret = -EINVAL; 164eb188d0eSMatt Porter } 165eb188d0eSMatt Porter } 166eb188d0eSMatt Porter 167eb188d0eSMatt Porter return ret; 168eb188d0eSMatt Porter } 169eb188d0eSMatt Porter 170eb188d0eSMatt Porter /** 171eb188d0eSMatt Porter * rio_enum_host- Set host lock and initialize host destination ID 172eb188d0eSMatt Porter * @port: Master port to issue transaction 173eb188d0eSMatt Porter * 174eb188d0eSMatt Porter * Sets the local host master port lock and destination ID register 175eb188d0eSMatt Porter * with the host device ID value. The host device ID value is provided 176eb188d0eSMatt Porter * by the platform. Returns %0 on success or %-1 on failure. 177eb188d0eSMatt Porter */ 178eb188d0eSMatt Porter static int rio_enum_host(struct rio_mport *port) 179eb188d0eSMatt Porter { 180eb188d0eSMatt Porter u32 result; 181eb188d0eSMatt Porter 182eb188d0eSMatt Porter /* Set master port host device id lock */ 183eb188d0eSMatt Porter rio_local_write_config_32(port, RIO_HOST_DID_LOCK_CSR, 184eb188d0eSMatt Porter port->host_deviceid); 185eb188d0eSMatt Porter 186eb188d0eSMatt Porter rio_local_read_config_32(port, RIO_HOST_DID_LOCK_CSR, &result); 187eb188d0eSMatt Porter if ((result & 0xffff) != port->host_deviceid) 188eb188d0eSMatt Porter return -1; 189eb188d0eSMatt Porter 190eb188d0eSMatt Porter /* Set master port destid and init destid ctr */ 191eb188d0eSMatt Porter rio_local_set_device_id(port, port->host_deviceid); 192eb188d0eSMatt Porter 193eb188d0eSMatt Porter if (next_destid == port->host_deviceid) 194eb188d0eSMatt Porter next_destid++; 195eb188d0eSMatt Porter 196eb188d0eSMatt Porter return 0; 197eb188d0eSMatt Porter } 198eb188d0eSMatt Porter 199eb188d0eSMatt Porter /** 200eb188d0eSMatt Porter * rio_device_has_destid- Test if a device contains a destination ID register 201eb188d0eSMatt Porter * @port: Master port to issue transaction 202eb188d0eSMatt Porter * @src_ops: RIO device source operations 203eb188d0eSMatt Porter * @dst_ops: RIO device destination operations 204eb188d0eSMatt Porter * 205eb188d0eSMatt Porter * Checks the provided @src_ops and @dst_ops for the necessary transaction 206eb188d0eSMatt Porter * capabilities that indicate whether or not a device will implement a 207eb188d0eSMatt Porter * destination ID register. Returns 1 if true or 0 if false. 208eb188d0eSMatt Porter */ 209eb188d0eSMatt Porter static int rio_device_has_destid(struct rio_mport *port, int src_ops, 210eb188d0eSMatt Porter int dst_ops) 211eb188d0eSMatt Porter { 212fa78cc51SMatt Porter 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; 213fa78cc51SMatt Porter 214fa78cc51SMatt Porter return !!((src_ops | dst_ops) & mask); 215eb188d0eSMatt Porter } 216eb188d0eSMatt Porter 217eb188d0eSMatt Porter /** 218eb188d0eSMatt Porter * rio_release_dev- Frees a RIO device struct 219eb188d0eSMatt Porter * @dev: LDM device associated with a RIO device struct 220eb188d0eSMatt Porter * 221eb188d0eSMatt Porter * Gets the RIO device struct associated a RIO device struct. 222eb188d0eSMatt Porter * The RIO device struct is freed. 223eb188d0eSMatt Porter */ 224eb188d0eSMatt Porter static void rio_release_dev(struct device *dev) 225eb188d0eSMatt Porter { 226eb188d0eSMatt Porter struct rio_dev *rdev; 227eb188d0eSMatt Porter 228eb188d0eSMatt Porter rdev = to_rio_dev(dev); 229eb188d0eSMatt Porter kfree(rdev); 230eb188d0eSMatt Porter } 231eb188d0eSMatt Porter 232eb188d0eSMatt Porter /** 233eb188d0eSMatt Porter * rio_is_switch- Tests if a RIO device has switch capabilities 234eb188d0eSMatt Porter * @rdev: RIO device 235eb188d0eSMatt Porter * 236eb188d0eSMatt Porter * Gets the RIO device Processing Element Features register 237eb188d0eSMatt Porter * contents and tests for switch capabilities. Returns 1 if 238eb188d0eSMatt Porter * the device is a switch or 0 if it is not a switch. 239eb188d0eSMatt Porter * The RIO device struct is freed. 240eb188d0eSMatt Porter */ 241eb188d0eSMatt Porter static int rio_is_switch(struct rio_dev *rdev) 242eb188d0eSMatt Porter { 243eb188d0eSMatt Porter if (rdev->pef & RIO_PEF_SWITCH) 244eb188d0eSMatt Porter return 1; 245eb188d0eSMatt Porter return 0; 246eb188d0eSMatt Porter } 247eb188d0eSMatt Porter 248eb188d0eSMatt Porter /** 249058f88d6SAlexandre Bounine * rio_switch_init - Sets switch operations for a particular vendor switch 250eb188d0eSMatt Porter * @rdev: RIO device 251058f88d6SAlexandre Bounine * @do_enum: Enumeration/Discovery mode flag 252eb188d0eSMatt Porter * 253058f88d6SAlexandre Bounine * Searches the RIO switch ops table for known switch types. If the vid 254058f88d6SAlexandre Bounine * and did match a switch table entry, then call switch initialization 255058f88d6SAlexandre Bounine * routine to setup switch-specific routines. 256eb188d0eSMatt Porter */ 257058f88d6SAlexandre Bounine static void rio_switch_init(struct rio_dev *rdev, int do_enum) 258eb188d0eSMatt Porter { 259058f88d6SAlexandre Bounine struct rio_switch_ops *cur = __start_rio_switch_ops; 260058f88d6SAlexandre Bounine struct rio_switch_ops *end = __end_rio_switch_ops; 261eb188d0eSMatt Porter 262eb188d0eSMatt Porter while (cur < end) { 263eb188d0eSMatt Porter if ((cur->vid == rdev->vid) && (cur->did == rdev->did)) { 264058f88d6SAlexandre Bounine pr_debug("RIO: calling init routine for %s\n", 265058f88d6SAlexandre Bounine rio_name(rdev)); 266058f88d6SAlexandre Bounine cur->init_hook(rdev, do_enum); 26707590ff0SAlexandre Bounine break; 268eb188d0eSMatt Porter } 269eb188d0eSMatt Porter cur++; 270eb188d0eSMatt Porter } 271eb188d0eSMatt Porter 27207590ff0SAlexandre Bounine if ((cur >= end) && (rdev->pef & RIO_PEF_STD_RT)) { 27307590ff0SAlexandre Bounine pr_debug("RIO: adding STD routing ops for %s\n", 27407590ff0SAlexandre Bounine rio_name(rdev)); 27507590ff0SAlexandre Bounine rdev->rswitch->add_entry = rio_std_route_add_entry; 27607590ff0SAlexandre Bounine rdev->rswitch->get_entry = rio_std_route_get_entry; 27707590ff0SAlexandre Bounine rdev->rswitch->clr_table = rio_std_route_clr_table; 27807590ff0SAlexandre Bounine } 27907590ff0SAlexandre Bounine 280eb188d0eSMatt Porter if (!rdev->rswitch->add_entry || !rdev->rswitch->get_entry) 281eb188d0eSMatt Porter printk(KERN_ERR "RIO: missing routing ops for %s\n", 282eb188d0eSMatt Porter rio_name(rdev)); 283eb188d0eSMatt Porter } 284eb188d0eSMatt Porter 285eb188d0eSMatt Porter /** 286eb188d0eSMatt Porter * rio_add_device- Adds a RIO device to the device model 287eb188d0eSMatt Porter * @rdev: RIO device 288eb188d0eSMatt Porter * 289eb188d0eSMatt Porter * Adds the RIO device to the global device list and adds the RIO 290eb188d0eSMatt Porter * device to the RIO device list. Creates the generic sysfs nodes 291eb188d0eSMatt Porter * for an RIO device. 292eb188d0eSMatt Porter */ 2935f28c520SYang Li static int __devinit rio_add_device(struct rio_dev *rdev) 294eb188d0eSMatt Porter { 2955f28c520SYang Li int err; 2965f28c520SYang Li 2975f28c520SYang Li err = device_add(&rdev->dev); 2985f28c520SYang Li if (err) 2995f28c520SYang Li return err; 300eb188d0eSMatt Porter 301eb188d0eSMatt Porter spin_lock(&rio_global_list_lock); 302eb188d0eSMatt Porter list_add_tail(&rdev->global_list, &rio_devices); 303eb188d0eSMatt Porter spin_unlock(&rio_global_list_lock); 304eb188d0eSMatt Porter 305eb188d0eSMatt Porter rio_create_sysfs_dev_files(rdev); 3065f28c520SYang Li 3075f28c520SYang Li return 0; 308eb188d0eSMatt Porter } 309eb188d0eSMatt Porter 310eb188d0eSMatt Porter /** 311933af4a6SThomas Moll * rio_enable_rx_tx_port - enable input reciever and output transmitter of 312933af4a6SThomas Moll * given port 313933af4a6SThomas Moll * @port: Master port associated with the RIO network 314933af4a6SThomas Moll * @local: local=1 select local port otherwise a far device is reached 315933af4a6SThomas Moll * @destid: Destination ID of the device to check host bit 316933af4a6SThomas Moll * @hopcount: Number of hops to reach the target 317933af4a6SThomas Moll * @port_num: Port (-number on switch) to enable on a far end device 318933af4a6SThomas Moll * 319933af4a6SThomas Moll * Returns 0 or 1 from on General Control Command and Status Register 320933af4a6SThomas Moll * (EXT_PTR+0x3C) 321933af4a6SThomas Moll */ 322933af4a6SThomas Moll inline int rio_enable_rx_tx_port(struct rio_mport *port, 323933af4a6SThomas Moll int local, u16 destid, 324933af4a6SThomas Moll u8 hopcount, u8 port_num) { 325933af4a6SThomas Moll #ifdef CONFIG_RAPIDIO_ENABLE_RX_TX_PORTS 326933af4a6SThomas Moll u32 regval; 327933af4a6SThomas Moll u32 ext_ftr_ptr; 328933af4a6SThomas Moll 329933af4a6SThomas Moll /* 330933af4a6SThomas Moll * enable rx input tx output port 331933af4a6SThomas Moll */ 332933af4a6SThomas Moll pr_debug("rio_enable_rx_tx_port(local = %d, destid = %d, hopcount = " 333933af4a6SThomas Moll "%d, port_num = %d)\n", local, destid, hopcount, port_num); 334933af4a6SThomas Moll 335933af4a6SThomas Moll ext_ftr_ptr = rio_mport_get_physefb(port, local, destid, hopcount); 336933af4a6SThomas Moll 337933af4a6SThomas Moll if (local) { 338933af4a6SThomas Moll rio_local_read_config_32(port, ext_ftr_ptr + 339933af4a6SThomas Moll RIO_PORT_N_CTL_CSR(0), 340933af4a6SThomas Moll ®val); 341933af4a6SThomas Moll } else { 342933af4a6SThomas Moll if (rio_mport_read_config_32(port, destid, hopcount, 343933af4a6SThomas Moll ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), ®val) < 0) 344933af4a6SThomas Moll return -EIO; 345933af4a6SThomas Moll } 346933af4a6SThomas Moll 347933af4a6SThomas Moll if (regval & RIO_PORT_N_CTL_P_TYP_SER) { 348933af4a6SThomas Moll /* serial */ 349933af4a6SThomas Moll regval = regval | RIO_PORT_N_CTL_EN_RX_SER 350933af4a6SThomas Moll | RIO_PORT_N_CTL_EN_TX_SER; 351933af4a6SThomas Moll } else { 352933af4a6SThomas Moll /* parallel */ 353933af4a6SThomas Moll regval = regval | RIO_PORT_N_CTL_EN_RX_PAR 354933af4a6SThomas Moll | RIO_PORT_N_CTL_EN_TX_PAR; 355933af4a6SThomas Moll } 356933af4a6SThomas Moll 357933af4a6SThomas Moll if (local) { 358933af4a6SThomas Moll rio_local_write_config_32(port, ext_ftr_ptr + 359933af4a6SThomas Moll RIO_PORT_N_CTL_CSR(0), regval); 360933af4a6SThomas Moll } else { 361933af4a6SThomas Moll if (rio_mport_write_config_32(port, destid, hopcount, 362933af4a6SThomas Moll ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), regval) < 0) 363933af4a6SThomas Moll return -EIO; 364933af4a6SThomas Moll } 365933af4a6SThomas Moll #endif 366933af4a6SThomas Moll return 0; 367933af4a6SThomas Moll } 368933af4a6SThomas Moll 369933af4a6SThomas Moll /** 370eb188d0eSMatt Porter * rio_setup_device- Allocates and sets up a RIO device 371eb188d0eSMatt Porter * @net: RIO network 372eb188d0eSMatt Porter * @port: Master port to send transactions 373eb188d0eSMatt Porter * @destid: Current destination ID 374eb188d0eSMatt Porter * @hopcount: Current hopcount 375eb188d0eSMatt Porter * @do_enum: Enumeration/Discovery mode flag 376eb188d0eSMatt Porter * 377eb188d0eSMatt Porter * Allocates a RIO device and configures fields based on configuration 378eb188d0eSMatt Porter * space contents. If device has a destination ID register, a destination 379eb188d0eSMatt Porter * ID is either assigned in enumeration mode or read from configuration 380eb188d0eSMatt Porter * space in discovery mode. If the device has switch capabilities, then 381eb188d0eSMatt Porter * a switch is allocated and configured appropriately. Returns a pointer 382eb188d0eSMatt Porter * to a RIO device on success or NULL on failure. 383eb188d0eSMatt Porter * 384eb188d0eSMatt Porter */ 385181a6ff0SLi Yang static struct rio_dev __devinit *rio_setup_device(struct rio_net *net, 386eb188d0eSMatt Porter struct rio_mport *port, u16 destid, 387eb188d0eSMatt Porter u8 hopcount, int do_enum) 388eb188d0eSMatt Porter { 3895f28c520SYang Li int ret = 0; 390eb188d0eSMatt Porter struct rio_dev *rdev; 3915f28c520SYang Li struct rio_switch *rswitch = NULL; 392eb188d0eSMatt Porter int result, rdid; 393eb188d0eSMatt Porter 394dd00cc48SYoann Padioleau rdev = kzalloc(sizeof(struct rio_dev), GFP_KERNEL); 395eb188d0eSMatt Porter if (!rdev) 3965f28c520SYang Li return NULL; 397eb188d0eSMatt Porter 398eb188d0eSMatt Porter rdev->net = net; 399eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, RIO_DEV_ID_CAR, 400eb188d0eSMatt Porter &result); 401eb188d0eSMatt Porter rdev->did = result >> 16; 402eb188d0eSMatt Porter rdev->vid = result & 0xffff; 403eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, RIO_DEV_INFO_CAR, 404eb188d0eSMatt Porter &rdev->device_rev); 405eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, RIO_ASM_ID_CAR, 406eb188d0eSMatt Porter &result); 407eb188d0eSMatt Porter rdev->asm_did = result >> 16; 408eb188d0eSMatt Porter rdev->asm_vid = result & 0xffff; 409eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, RIO_ASM_INFO_CAR, 410eb188d0eSMatt Porter &result); 411eb188d0eSMatt Porter rdev->asm_rev = result >> 16; 412eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, RIO_PEF_CAR, 413eb188d0eSMatt Porter &rdev->pef); 414e5cabeb3SAlexandre Bounine if (rdev->pef & RIO_PEF_EXT_FEATURES) { 415eb188d0eSMatt Porter rdev->efptr = result & 0xffff; 416e5cabeb3SAlexandre Bounine rdev->phys_efptr = rio_mport_get_physefb(port, 0, destid, 417e5cabeb3SAlexandre Bounine hopcount); 418e5cabeb3SAlexandre Bounine 419e5cabeb3SAlexandre Bounine rdev->em_efptr = rio_mport_get_feature(port, 0, destid, 420e5cabeb3SAlexandre Bounine hopcount, RIO_EFB_ERR_MGMNT); 421e5cabeb3SAlexandre Bounine } 422eb188d0eSMatt Porter 423ae05cbd5SAlexandre Bounine if (rdev->pef & (RIO_PEF_SWITCH | RIO_PEF_MULTIPORT)) { 424ae05cbd5SAlexandre Bounine rio_mport_read_config_32(port, destid, hopcount, 425ae05cbd5SAlexandre Bounine RIO_SWP_INFO_CAR, &rdev->swpinfo); 426ae05cbd5SAlexandre Bounine } 427ae05cbd5SAlexandre Bounine 428eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, RIO_SRC_OPS_CAR, 429eb188d0eSMatt Porter &rdev->src_ops); 430eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, RIO_DST_OPS_CAR, 431eb188d0eSMatt Porter &rdev->dst_ops); 432eb188d0eSMatt Porter 433c70555b0SAlexandre Bounine if (rio_device_has_destid(port, rdev->src_ops, rdev->dst_ops)) { 434c70555b0SAlexandre Bounine if (do_enum) { 435eb188d0eSMatt Porter rio_set_device_id(port, destid, hopcount, next_destid); 436eb188d0eSMatt Porter rdev->destid = next_destid++; 437eb188d0eSMatt Porter if (next_destid == port->host_deviceid) 438eb188d0eSMatt Porter next_destid++; 439eb188d0eSMatt Porter } else 440eb188d0eSMatt Porter rdev->destid = rio_get_device_id(port, destid, hopcount); 441c70555b0SAlexandre Bounine } else 442c70555b0SAlexandre Bounine /* Switch device has an associated destID */ 443c70555b0SAlexandre Bounine rdev->destid = RIO_INVALID_DESTID; 444eb188d0eSMatt Porter 445eb188d0eSMatt Porter /* If a PE has both switch and other functions, show it as a switch */ 446eb188d0eSMatt Porter if (rio_is_switch(rdev)) { 44768fe4df5SAlexandre Bounine rswitch = kzalloc(sizeof(*rswitch) + 44868fe4df5SAlexandre Bounine RIO_GET_TOTAL_PORTS(rdev->swpinfo) * 44968fe4df5SAlexandre Bounine sizeof(rswitch->nextdev[0]), 45068fe4df5SAlexandre Bounine GFP_KERNEL); 4515f28c520SYang Li if (!rswitch) 4525f28c520SYang Li goto cleanup; 453eb188d0eSMatt Porter rswitch->switchid = next_switchid; 454eb188d0eSMatt Porter rswitch->hopcount = hopcount; 455c70555b0SAlexandre Bounine rswitch->destid = destid; 456e5cabeb3SAlexandre Bounine rswitch->port_ok = 0; 457e0423236SZhang Wei rswitch->route_table = kzalloc(sizeof(u8)* 458e0423236SZhang Wei RIO_MAX_ROUTE_ENTRIES(port->sys_size), 459e0423236SZhang Wei GFP_KERNEL); 4605f28c520SYang Li if (!rswitch->route_table) 4615f28c520SYang Li goto cleanup; 462eb188d0eSMatt Porter /* Initialize switch route table */ 463e0423236SZhang Wei for (rdid = 0; rdid < RIO_MAX_ROUTE_ENTRIES(port->sys_size); 464e0423236SZhang Wei rdid++) 465eb188d0eSMatt Porter rswitch->route_table[rdid] = RIO_INVALID_ROUTE; 466eb188d0eSMatt Porter rdev->rswitch = rswitch; 467ae05cbd5SAlexandre Bounine rswitch->rdev = rdev; 468b53c7583SKay Sievers dev_set_name(&rdev->dev, "%02x:s:%04x", rdev->net->id, 469eb188d0eSMatt Porter rdev->rswitch->switchid); 470058f88d6SAlexandre Bounine rio_switch_init(rdev, do_enum); 471eb188d0eSMatt Porter 47207590ff0SAlexandre Bounine if (do_enum && rdev->rswitch->clr_table) 47307590ff0SAlexandre Bounine rdev->rswitch->clr_table(port, destid, hopcount, 47407590ff0SAlexandre Bounine RIO_GLOBAL_TABLE); 47507590ff0SAlexandre Bounine 476eb188d0eSMatt Porter list_add_tail(&rswitch->node, &rio_switches); 477eb188d0eSMatt Porter 478933af4a6SThomas Moll } else { 479933af4a6SThomas Moll if (do_enum) 480933af4a6SThomas Moll /*Enable Input Output Port (transmitter reviever)*/ 481933af4a6SThomas Moll rio_enable_rx_tx_port(port, 0, destid, hopcount, 0); 482933af4a6SThomas Moll 483b53c7583SKay Sievers dev_set_name(&rdev->dev, "%02x:e:%04x", rdev->net->id, 484eb188d0eSMatt Porter rdev->destid); 485933af4a6SThomas Moll } 486eb188d0eSMatt Porter 487eb188d0eSMatt Porter rdev->dev.bus = &rio_bus_type; 4882c70f022SAlexandre Bounine rdev->dev.parent = &rio_bus; 489eb188d0eSMatt Porter 490eb188d0eSMatt Porter device_initialize(&rdev->dev); 491eb188d0eSMatt Porter rdev->dev.release = rio_release_dev; 492eb188d0eSMatt Porter rio_dev_get(rdev); 493eb188d0eSMatt Porter 494284901a9SYang Hongyang rdev->dma_mask = DMA_BIT_MASK(32); 495fa78cc51SMatt Porter rdev->dev.dma_mask = &rdev->dma_mask; 496284901a9SYang Hongyang rdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); 497eb188d0eSMatt Porter 498eb188d0eSMatt Porter if ((rdev->pef & RIO_PEF_INB_DOORBELL) && 499eb188d0eSMatt Porter (rdev->dst_ops & RIO_DST_OPS_DOORBELL)) 500eb188d0eSMatt Porter rio_init_dbell_res(&rdev->riores[RIO_DOORBELL_RESOURCE], 501eb188d0eSMatt Porter 0, 0xffff); 502eb188d0eSMatt Porter 5035f28c520SYang Li ret = rio_add_device(rdev); 5045f28c520SYang Li if (ret) 5055f28c520SYang Li goto cleanup; 506eb188d0eSMatt Porter 507eb188d0eSMatt Porter return rdev; 5085f28c520SYang Li 5095f28c520SYang Li cleanup: 5105f28c520SYang Li if (rswitch) { 5115f28c520SYang Li kfree(rswitch->route_table); 5125f28c520SYang Li kfree(rswitch); 5135f28c520SYang Li } 5145f28c520SYang Li kfree(rdev); 5155f28c520SYang Li return NULL; 516eb188d0eSMatt Porter } 517eb188d0eSMatt Porter 518eb188d0eSMatt Porter /** 519eb188d0eSMatt Porter * rio_sport_is_active- Tests if a switch port has an active connection. 520eb188d0eSMatt Porter * @port: Master port to send transaction 521eb188d0eSMatt Porter * @destid: Associated destination ID for switch 522eb188d0eSMatt Porter * @hopcount: Hopcount to reach switch 523eb188d0eSMatt Porter * @sport: Switch port number 524eb188d0eSMatt Porter * 525eb188d0eSMatt Porter * Reads the port error status CSR for a particular switch port to 526eb188d0eSMatt Porter * determine if the port has an active link. Returns 527e5cabeb3SAlexandre Bounine * %RIO_PORT_N_ERR_STS_PORT_OK if the port is active or %0 if it is 528eb188d0eSMatt Porter * inactive. 529eb188d0eSMatt Porter */ 530eb188d0eSMatt Porter static int 531eb188d0eSMatt Porter rio_sport_is_active(struct rio_mport *port, u16 destid, u8 hopcount, int sport) 532eb188d0eSMatt Porter { 533e5cabeb3SAlexandre Bounine u32 result = 0; 534eb188d0eSMatt Porter u32 ext_ftr_ptr; 535eb188d0eSMatt Porter 536e5cabeb3SAlexandre Bounine ext_ftr_ptr = rio_mport_get_efb(port, 0, destid, hopcount, 0); 537eb188d0eSMatt Porter 538e5cabeb3SAlexandre Bounine while (ext_ftr_ptr) { 539e5cabeb3SAlexandre Bounine rio_mport_read_config_32(port, destid, hopcount, 540e5cabeb3SAlexandre Bounine ext_ftr_ptr, &result); 541e5cabeb3SAlexandre Bounine result = RIO_GET_BLOCK_ID(result); 542e5cabeb3SAlexandre Bounine if ((result == RIO_EFB_SER_EP_FREE_ID) || 543e5cabeb3SAlexandre Bounine (result == RIO_EFB_SER_EP_FREE_ID_V13P) || 544e5cabeb3SAlexandre Bounine (result == RIO_EFB_SER_EP_FREC_ID)) 545eb188d0eSMatt Porter break; 546e5cabeb3SAlexandre Bounine 547e5cabeb3SAlexandre Bounine ext_ftr_ptr = rio_mport_get_efb(port, 0, destid, hopcount, 548e5cabeb3SAlexandre Bounine ext_ftr_ptr); 549e5cabeb3SAlexandre Bounine } 550eb188d0eSMatt Porter 551eb188d0eSMatt Porter if (ext_ftr_ptr) 552eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, 553eb188d0eSMatt Porter ext_ftr_ptr + 554eb188d0eSMatt Porter RIO_PORT_N_ERR_STS_CSR(sport), 555eb188d0eSMatt Porter &result); 556eb188d0eSMatt Porter 557e5cabeb3SAlexandre Bounine return result & RIO_PORT_N_ERR_STS_PORT_OK; 558eb188d0eSMatt Porter } 559eb188d0eSMatt Porter 560eb188d0eSMatt Porter /** 561818a04a0SAlexandre Bounine * rio_lock_device - Acquires host device lock for specified device 562818a04a0SAlexandre Bounine * @port: Master port to send transaction 563818a04a0SAlexandre Bounine * @destid: Destination ID for device/switch 564818a04a0SAlexandre Bounine * @hopcount: Hopcount to reach switch 565818a04a0SAlexandre Bounine * @wait_ms: Max wait time in msec (0 = no timeout) 566818a04a0SAlexandre Bounine * 567818a04a0SAlexandre Bounine * Attepts to acquire host device lock for specified device 568818a04a0SAlexandre Bounine * Returns 0 if device lock acquired or EINVAL if timeout expires. 569818a04a0SAlexandre Bounine */ 570818a04a0SAlexandre Bounine static int 571818a04a0SAlexandre Bounine rio_lock_device(struct rio_mport *port, u16 destid, u8 hopcount, int wait_ms) 572818a04a0SAlexandre Bounine { 573818a04a0SAlexandre Bounine u32 result; 574818a04a0SAlexandre Bounine int tcnt = 0; 575818a04a0SAlexandre Bounine 576818a04a0SAlexandre Bounine /* Attempt to acquire device lock */ 577818a04a0SAlexandre Bounine rio_mport_write_config_32(port, destid, hopcount, 578818a04a0SAlexandre Bounine RIO_HOST_DID_LOCK_CSR, port->host_deviceid); 579818a04a0SAlexandre Bounine rio_mport_read_config_32(port, destid, hopcount, 580818a04a0SAlexandre Bounine RIO_HOST_DID_LOCK_CSR, &result); 581818a04a0SAlexandre Bounine 582818a04a0SAlexandre Bounine while (result != port->host_deviceid) { 583818a04a0SAlexandre Bounine if (wait_ms != 0 && tcnt == wait_ms) { 584818a04a0SAlexandre Bounine pr_debug("RIO: timeout when locking device %x:%x\n", 585818a04a0SAlexandre Bounine destid, hopcount); 586818a04a0SAlexandre Bounine return -EINVAL; 587818a04a0SAlexandre Bounine } 588818a04a0SAlexandre Bounine 589818a04a0SAlexandre Bounine /* Delay a bit */ 590818a04a0SAlexandre Bounine mdelay(1); 591818a04a0SAlexandre Bounine tcnt++; 592818a04a0SAlexandre Bounine /* Try to acquire device lock again */ 593818a04a0SAlexandre Bounine rio_mport_write_config_32(port, destid, 594818a04a0SAlexandre Bounine hopcount, 595818a04a0SAlexandre Bounine RIO_HOST_DID_LOCK_CSR, 596818a04a0SAlexandre Bounine port->host_deviceid); 597818a04a0SAlexandre Bounine rio_mport_read_config_32(port, destid, 598818a04a0SAlexandre Bounine hopcount, 599818a04a0SAlexandre Bounine RIO_HOST_DID_LOCK_CSR, &result); 600818a04a0SAlexandre Bounine } 601818a04a0SAlexandre Bounine 602818a04a0SAlexandre Bounine return 0; 603818a04a0SAlexandre Bounine } 604818a04a0SAlexandre Bounine 605818a04a0SAlexandre Bounine /** 606818a04a0SAlexandre Bounine * rio_unlock_device - Releases host device lock for specified device 607818a04a0SAlexandre Bounine * @port: Master port to send transaction 608818a04a0SAlexandre Bounine * @destid: Destination ID for device/switch 609818a04a0SAlexandre Bounine * @hopcount: Hopcount to reach switch 610818a04a0SAlexandre Bounine * 611818a04a0SAlexandre Bounine * Returns 0 if device lock released or EINVAL if fails. 612818a04a0SAlexandre Bounine */ 613818a04a0SAlexandre Bounine static int 614818a04a0SAlexandre Bounine rio_unlock_device(struct rio_mport *port, u16 destid, u8 hopcount) 615818a04a0SAlexandre Bounine { 616818a04a0SAlexandre Bounine u32 result; 617818a04a0SAlexandre Bounine 618818a04a0SAlexandre Bounine /* Release device lock */ 619818a04a0SAlexandre Bounine rio_mport_write_config_32(port, destid, 620818a04a0SAlexandre Bounine hopcount, 621818a04a0SAlexandre Bounine RIO_HOST_DID_LOCK_CSR, 622818a04a0SAlexandre Bounine port->host_deviceid); 623818a04a0SAlexandre Bounine rio_mport_read_config_32(port, destid, hopcount, 624818a04a0SAlexandre Bounine RIO_HOST_DID_LOCK_CSR, &result); 625818a04a0SAlexandre Bounine if ((result & 0xffff) != 0xffff) { 626818a04a0SAlexandre Bounine pr_debug("RIO: badness when releasing device lock %x:%x\n", 627818a04a0SAlexandre Bounine destid, hopcount); 628818a04a0SAlexandre Bounine return -EINVAL; 629818a04a0SAlexandre Bounine } 630818a04a0SAlexandre Bounine 631818a04a0SAlexandre Bounine return 0; 632818a04a0SAlexandre Bounine } 633818a04a0SAlexandre Bounine 634818a04a0SAlexandre Bounine /** 635eb188d0eSMatt Porter * rio_route_add_entry- Add a route entry to a switch routing table 636eb188d0eSMatt Porter * @mport: Master port to send transaction 637c70555b0SAlexandre Bounine * @rswitch: Switch device 638eb188d0eSMatt Porter * @table: Routing table ID 639eb188d0eSMatt Porter * @route_destid: Destination ID to be routed 640eb188d0eSMatt Porter * @route_port: Port number to be routed 641818a04a0SAlexandre Bounine * @lock: lock switch device flag 642eb188d0eSMatt Porter * 643eb188d0eSMatt Porter * Calls the switch specific add_entry() method to add a route entry 644eb188d0eSMatt Porter * on a switch. The route table can be specified using the @table 645eb188d0eSMatt Porter * argument if a switch has per port routing tables or the normal 646eb188d0eSMatt Porter * use is to specific all tables (or the global table) by passing 647eb188d0eSMatt Porter * %RIO_GLOBAL_TABLE in @table. Returns %0 on success or %-EINVAL 648eb188d0eSMatt Porter * on failure. 649eb188d0eSMatt Porter */ 650818a04a0SAlexandre Bounine static int 651818a04a0SAlexandre Bounine rio_route_add_entry(struct rio_mport *mport, struct rio_switch *rswitch, 652818a04a0SAlexandre Bounine u16 table, u16 route_destid, u8 route_port, int lock) 653eb188d0eSMatt Porter { 654818a04a0SAlexandre Bounine int rc; 655818a04a0SAlexandre Bounine 656818a04a0SAlexandre Bounine if (lock) { 657818a04a0SAlexandre Bounine rc = rio_lock_device(mport, rswitch->destid, 658818a04a0SAlexandre Bounine rswitch->hopcount, 1000); 659818a04a0SAlexandre Bounine if (rc) 660818a04a0SAlexandre Bounine return rc; 661818a04a0SAlexandre Bounine } 662818a04a0SAlexandre Bounine 663818a04a0SAlexandre Bounine rc = rswitch->add_entry(mport, rswitch->destid, 664c70555b0SAlexandre Bounine rswitch->hopcount, table, 665eb188d0eSMatt Porter route_destid, route_port); 666818a04a0SAlexandre Bounine if (lock) 667818a04a0SAlexandre Bounine rio_unlock_device(mport, rswitch->destid, rswitch->hopcount); 668818a04a0SAlexandre Bounine 669818a04a0SAlexandre Bounine return rc; 670eb188d0eSMatt Porter } 671eb188d0eSMatt Porter 672eb188d0eSMatt Porter /** 673eb188d0eSMatt Porter * rio_route_get_entry- Read a route entry in a switch routing table 674eb188d0eSMatt Porter * @mport: Master port to send transaction 675c70555b0SAlexandre Bounine * @rswitch: Switch device 676eb188d0eSMatt Porter * @table: Routing table ID 677eb188d0eSMatt Porter * @route_destid: Destination ID to be routed 678eb188d0eSMatt Porter * @route_port: Pointer to read port number into 679818a04a0SAlexandre Bounine * @lock: lock switch device flag 680eb188d0eSMatt Porter * 681eb188d0eSMatt Porter * Calls the switch specific get_entry() method to read a route entry 682eb188d0eSMatt Porter * in a switch. The route table can be specified using the @table 683eb188d0eSMatt Porter * argument if a switch has per port routing tables or the normal 684eb188d0eSMatt Porter * use is to specific all tables (or the global table) by passing 685eb188d0eSMatt Porter * %RIO_GLOBAL_TABLE in @table. Returns %0 on success or %-EINVAL 686eb188d0eSMatt Porter * on failure. 687eb188d0eSMatt Porter */ 688eb188d0eSMatt Porter static int 689c70555b0SAlexandre Bounine rio_route_get_entry(struct rio_mport *mport, struct rio_switch *rswitch, u16 table, 690818a04a0SAlexandre Bounine u16 route_destid, u8 *route_port, int lock) 691eb188d0eSMatt Porter { 692818a04a0SAlexandre Bounine int rc; 693818a04a0SAlexandre Bounine 694818a04a0SAlexandre Bounine if (lock) { 695818a04a0SAlexandre Bounine rc = rio_lock_device(mport, rswitch->destid, 696818a04a0SAlexandre Bounine rswitch->hopcount, 1000); 697818a04a0SAlexandre Bounine if (rc) 698818a04a0SAlexandre Bounine return rc; 699818a04a0SAlexandre Bounine } 700818a04a0SAlexandre Bounine 701818a04a0SAlexandre Bounine rc = rswitch->get_entry(mport, rswitch->destid, 702c70555b0SAlexandre Bounine rswitch->hopcount, table, 703eb188d0eSMatt Porter route_destid, route_port); 704818a04a0SAlexandre Bounine if (lock) 705818a04a0SAlexandre Bounine rio_unlock_device(mport, rswitch->destid, rswitch->hopcount); 706818a04a0SAlexandre Bounine 707818a04a0SAlexandre Bounine return rc; 708eb188d0eSMatt Porter } 709eb188d0eSMatt Porter 710eb188d0eSMatt Porter /** 711eb188d0eSMatt Porter * rio_get_host_deviceid_lock- Reads the Host Device ID Lock CSR on a device 712eb188d0eSMatt Porter * @port: Master port to send transaction 713eb188d0eSMatt Porter * @hopcount: Number of hops to the device 714eb188d0eSMatt Porter * 715eb188d0eSMatt Porter * Used during enumeration to read the Host Device ID Lock CSR on a 716eb188d0eSMatt Porter * RIO device. Returns the value of the lock register. 717eb188d0eSMatt Porter */ 718eb188d0eSMatt Porter static u16 rio_get_host_deviceid_lock(struct rio_mport *port, u8 hopcount) 719eb188d0eSMatt Porter { 720eb188d0eSMatt Porter u32 result; 721eb188d0eSMatt Porter 722e0423236SZhang Wei rio_mport_read_config_32(port, RIO_ANY_DESTID(port->sys_size), hopcount, 723eb188d0eSMatt Porter RIO_HOST_DID_LOCK_CSR, &result); 724eb188d0eSMatt Porter 725eb188d0eSMatt Porter return (u16) (result & 0xffff); 726eb188d0eSMatt Porter } 727eb188d0eSMatt Porter 728eb188d0eSMatt Porter /** 729eb188d0eSMatt Porter * rio_net_add_mport- Add a master port to a RIO network 730eb188d0eSMatt Porter * @net: RIO network 731eb188d0eSMatt Porter * @port: Master port to add 732eb188d0eSMatt Porter * 733eb188d0eSMatt Porter * Adds a master port to the network list of associated master 734eb188d0eSMatt Porter * ports.. 735eb188d0eSMatt Porter */ 736eb188d0eSMatt Porter static void rio_net_add_mport(struct rio_net *net, struct rio_mport *port) 737eb188d0eSMatt Porter { 738eb188d0eSMatt Porter spin_lock(&rio_global_list_lock); 739eb188d0eSMatt Porter list_add_tail(&port->nnode, &net->mports); 740eb188d0eSMatt Porter spin_unlock(&rio_global_list_lock); 741eb188d0eSMatt Porter } 742eb188d0eSMatt Porter 743eb188d0eSMatt Porter /** 744eb188d0eSMatt Porter * rio_enum_peer- Recursively enumerate a RIO network through a master port 745eb188d0eSMatt Porter * @net: RIO network being enumerated 746eb188d0eSMatt Porter * @port: Master port to send transactions 747eb188d0eSMatt Porter * @hopcount: Number of hops into the network 74868fe4df5SAlexandre Bounine * @prev: Previous RIO device connected to the enumerated one 74968fe4df5SAlexandre Bounine * @prev_port: Port on previous RIO device 750eb188d0eSMatt Porter * 751eb188d0eSMatt Porter * Recursively enumerates a RIO network. Transactions are sent via the 752eb188d0eSMatt Porter * master port passed in @port. 753eb188d0eSMatt Porter */ 754181a6ff0SLi Yang static int __devinit rio_enum_peer(struct rio_net *net, struct rio_mport *port, 75568fe4df5SAlexandre Bounine u8 hopcount, struct rio_dev *prev, int prev_port) 756eb188d0eSMatt Porter { 757eb188d0eSMatt Porter int port_num; 758eb188d0eSMatt Porter int cur_destid; 759c70555b0SAlexandre Bounine int sw_destid; 760c70555b0SAlexandre Bounine int sw_inport; 761eb188d0eSMatt Porter struct rio_dev *rdev; 762eb188d0eSMatt Porter u16 destid; 763eb188d0eSMatt Porter int tmp; 764eb188d0eSMatt Porter 765eb188d0eSMatt Porter if (rio_get_host_deviceid_lock(port, hopcount) == port->host_deviceid) { 766eb188d0eSMatt Porter pr_debug("RIO: PE already discovered by this host\n"); 767eb188d0eSMatt Porter /* 768eb188d0eSMatt Porter * Already discovered by this host. Add it as another 769eb188d0eSMatt Porter * master port for the current network. 770eb188d0eSMatt Porter */ 771eb188d0eSMatt Porter rio_net_add_mport(net, port); 772eb188d0eSMatt Porter return 0; 773eb188d0eSMatt Porter } 774eb188d0eSMatt Porter 775eb188d0eSMatt Porter /* Attempt to acquire device lock */ 776e0423236SZhang Wei rio_mport_write_config_32(port, RIO_ANY_DESTID(port->sys_size), 777e0423236SZhang Wei hopcount, 778eb188d0eSMatt Porter RIO_HOST_DID_LOCK_CSR, port->host_deviceid); 779eb188d0eSMatt Porter while ((tmp = rio_get_host_deviceid_lock(port, hopcount)) 780eb188d0eSMatt Porter < port->host_deviceid) { 781eb188d0eSMatt Porter /* Delay a bit */ 782eb188d0eSMatt Porter mdelay(1); 783eb188d0eSMatt Porter /* Attempt to acquire device lock again */ 784e0423236SZhang Wei rio_mport_write_config_32(port, RIO_ANY_DESTID(port->sys_size), 785e0423236SZhang Wei hopcount, 786eb188d0eSMatt Porter RIO_HOST_DID_LOCK_CSR, 787eb188d0eSMatt Porter port->host_deviceid); 788eb188d0eSMatt Porter } 789eb188d0eSMatt Porter 790eb188d0eSMatt Porter if (rio_get_host_deviceid_lock(port, hopcount) > port->host_deviceid) { 791eb188d0eSMatt Porter pr_debug( 792eb188d0eSMatt Porter "RIO: PE locked by a higher priority host...retreating\n"); 793eb188d0eSMatt Porter return -1; 794eb188d0eSMatt Porter } 795eb188d0eSMatt Porter 796eb188d0eSMatt Porter /* Setup new RIO device */ 797e0423236SZhang Wei rdev = rio_setup_device(net, port, RIO_ANY_DESTID(port->sys_size), 798e0423236SZhang Wei hopcount, 1); 799e0423236SZhang Wei if (rdev) { 800eb188d0eSMatt Porter /* Add device to the global and bus/net specific list. */ 801eb188d0eSMatt Porter list_add_tail(&rdev->net_list, &net->devices); 80268fe4df5SAlexandre Bounine rdev->prev = prev; 80368fe4df5SAlexandre Bounine if (prev && rio_is_switch(prev)) 80468fe4df5SAlexandre Bounine prev->rswitch->nextdev[prev_port] = rdev; 805eb188d0eSMatt Porter } else 806eb188d0eSMatt Porter return -1; 807eb188d0eSMatt Porter 808eb188d0eSMatt Porter if (rio_is_switch(rdev)) { 809eb188d0eSMatt Porter next_switchid++; 810ae05cbd5SAlexandre Bounine sw_inport = RIO_GET_PORT_NUM(rdev->swpinfo); 811c70555b0SAlexandre Bounine rio_route_add_entry(port, rdev->rswitch, RIO_GLOBAL_TABLE, 812818a04a0SAlexandre Bounine port->host_deviceid, sw_inport, 0); 813c70555b0SAlexandre Bounine rdev->rswitch->route_table[port->host_deviceid] = sw_inport; 814eb188d0eSMatt Porter 815eb188d0eSMatt Porter for (destid = 0; destid < next_destid; destid++) { 816c70555b0SAlexandre Bounine if (destid == port->host_deviceid) 817c70555b0SAlexandre Bounine continue; 818c70555b0SAlexandre Bounine rio_route_add_entry(port, rdev->rswitch, RIO_GLOBAL_TABLE, 819818a04a0SAlexandre Bounine destid, sw_inport, 0); 820c70555b0SAlexandre Bounine rdev->rswitch->route_table[destid] = sw_inport; 821eb188d0eSMatt Porter } 822eb188d0eSMatt Porter 823eb188d0eSMatt Porter pr_debug( 824eb188d0eSMatt Porter "RIO: found %s (vid %4.4x did %4.4x) with %d ports\n", 82568fe4df5SAlexandre Bounine rio_name(rdev), rdev->vid, rdev->did, 82668fe4df5SAlexandre Bounine RIO_GET_TOTAL_PORTS(rdev->swpinfo)); 827c70555b0SAlexandre Bounine sw_destid = next_destid; 82868fe4df5SAlexandre Bounine for (port_num = 0; 82968fe4df5SAlexandre Bounine port_num < RIO_GET_TOTAL_PORTS(rdev->swpinfo); 83068fe4df5SAlexandre Bounine port_num++) { 831933af4a6SThomas Moll /*Enable Input Output Port (transmitter reviever)*/ 832933af4a6SThomas Moll rio_enable_rx_tx_port(port, 0, 833933af4a6SThomas Moll RIO_ANY_DESTID(port->sys_size), 834933af4a6SThomas Moll hopcount, port_num); 835933af4a6SThomas Moll 836e5cabeb3SAlexandre Bounine if (sw_inport == port_num) { 837e5cabeb3SAlexandre Bounine rdev->rswitch->port_ok |= (1 << port_num); 838eb188d0eSMatt Porter continue; 839e5cabeb3SAlexandre Bounine } 840eb188d0eSMatt Porter 841eb188d0eSMatt Porter cur_destid = next_destid; 842eb188d0eSMatt Porter 843eb188d0eSMatt Porter if (rio_sport_is_active 844e0423236SZhang Wei (port, RIO_ANY_DESTID(port->sys_size), hopcount, 845e0423236SZhang Wei port_num)) { 846eb188d0eSMatt Porter pr_debug( 847eb188d0eSMatt Porter "RIO: scanning device on port %d\n", 848eb188d0eSMatt Porter port_num); 849e5cabeb3SAlexandre Bounine rdev->rswitch->port_ok |= (1 << port_num); 850c70555b0SAlexandre Bounine rio_route_add_entry(port, rdev->rswitch, 851eb188d0eSMatt Porter RIO_GLOBAL_TABLE, 852e0423236SZhang Wei RIO_ANY_DESTID(port->sys_size), 853818a04a0SAlexandre Bounine port_num, 0); 854eb188d0eSMatt Porter 85568fe4df5SAlexandre Bounine if (rio_enum_peer(net, port, hopcount + 1, 85668fe4df5SAlexandre Bounine rdev, port_num) < 0) 857eb188d0eSMatt Porter return -1; 858eb188d0eSMatt Porter 859eb188d0eSMatt Porter /* Update routing tables */ 860eb188d0eSMatt Porter if (next_destid > cur_destid) { 861eb188d0eSMatt Porter for (destid = cur_destid; 862eb188d0eSMatt Porter destid < next_destid; destid++) { 863c70555b0SAlexandre Bounine if (destid == port->host_deviceid) 864c70555b0SAlexandre Bounine continue; 865c70555b0SAlexandre Bounine rio_route_add_entry(port, rdev->rswitch, 866eb188d0eSMatt Porter RIO_GLOBAL_TABLE, 867eb188d0eSMatt Porter destid, 868818a04a0SAlexandre Bounine port_num, 869818a04a0SAlexandre Bounine 0); 870eb188d0eSMatt Porter rdev->rswitch-> 871eb188d0eSMatt Porter route_table[destid] = 872eb188d0eSMatt Porter port_num; 873eb188d0eSMatt Porter } 874eb188d0eSMatt Porter } 875e5cabeb3SAlexandre Bounine } else { 876e5cabeb3SAlexandre Bounine /* If switch supports Error Management, 877e5cabeb3SAlexandre Bounine * set PORT_LOCKOUT bit for unused port 878e5cabeb3SAlexandre Bounine */ 879e5cabeb3SAlexandre Bounine if (rdev->em_efptr) 880e5cabeb3SAlexandre Bounine rio_set_port_lockout(rdev, port_num, 1); 881e5cabeb3SAlexandre Bounine 882e5cabeb3SAlexandre Bounine rdev->rswitch->port_ok &= ~(1 << port_num); 883eb188d0eSMatt Porter } 884eb188d0eSMatt Porter } 885c70555b0SAlexandre Bounine 886e5cabeb3SAlexandre Bounine /* Direct Port-write messages to the enumeratiing host */ 887e5cabeb3SAlexandre Bounine if ((rdev->src_ops & RIO_SRC_OPS_PORT_WRITE) && 888e5cabeb3SAlexandre Bounine (rdev->em_efptr)) { 889e5cabeb3SAlexandre Bounine rio_write_config_32(rdev, 890e5cabeb3SAlexandre Bounine rdev->em_efptr + RIO_EM_PW_TGT_DEVID, 891e5cabeb3SAlexandre Bounine (port->host_deviceid << 16) | 892e5cabeb3SAlexandre Bounine (port->sys_size << 15)); 893e5cabeb3SAlexandre Bounine } 894e5cabeb3SAlexandre Bounine 895e5cabeb3SAlexandre Bounine rio_init_em(rdev); 896e5cabeb3SAlexandre Bounine 897c70555b0SAlexandre Bounine /* Check for empty switch */ 898c70555b0SAlexandre Bounine if (next_destid == sw_destid) { 899c70555b0SAlexandre Bounine next_destid++; 900c70555b0SAlexandre Bounine if (next_destid == port->host_deviceid) 901c70555b0SAlexandre Bounine next_destid++; 902c70555b0SAlexandre Bounine } 903c70555b0SAlexandre Bounine 904c70555b0SAlexandre Bounine rdev->rswitch->destid = sw_destid; 905eb188d0eSMatt Porter } else 906eb188d0eSMatt Porter pr_debug("RIO: found %s (vid %4.4x did %4.4x)\n", 907eb188d0eSMatt Porter rio_name(rdev), rdev->vid, rdev->did); 908eb188d0eSMatt Porter 909eb188d0eSMatt Porter return 0; 910eb188d0eSMatt Porter } 911eb188d0eSMatt Porter 912eb188d0eSMatt Porter /** 913eb188d0eSMatt Porter * rio_enum_complete- Tests if enumeration of a network is complete 914eb188d0eSMatt Porter * @port: Master port to send transaction 915eb188d0eSMatt Porter * 916e5cabeb3SAlexandre Bounine * Tests the Component Tag CSR for non-zero value (enumeration 917e5cabeb3SAlexandre Bounine * complete flag). Return %1 if enumeration is complete or %0 if 918eb188d0eSMatt Porter * enumeration is incomplete. 919eb188d0eSMatt Porter */ 920eb188d0eSMatt Porter static int rio_enum_complete(struct rio_mport *port) 921eb188d0eSMatt Porter { 922eb188d0eSMatt Porter u32 tag_csr; 923eb188d0eSMatt Porter 924eb188d0eSMatt Porter rio_local_read_config_32(port, RIO_COMPONENT_TAG_CSR, &tag_csr); 925e5cabeb3SAlexandre Bounine return (tag_csr & 0xffff) ? 1 : 0; 926eb188d0eSMatt Porter } 927eb188d0eSMatt Porter 928eb188d0eSMatt Porter /** 929eb188d0eSMatt Porter * rio_disc_peer- Recursively discovers a RIO network through a master port 930eb188d0eSMatt Porter * @net: RIO network being discovered 931eb188d0eSMatt Porter * @port: Master port to send transactions 932eb188d0eSMatt Porter * @destid: Current destination ID in network 933eb188d0eSMatt Porter * @hopcount: Number of hops into the network 934eb188d0eSMatt Porter * 935eb188d0eSMatt Porter * Recursively discovers a RIO network. Transactions are sent via the 936eb188d0eSMatt Porter * master port passed in @port. 937eb188d0eSMatt Porter */ 938181a6ff0SLi Yang static int __devinit 939eb188d0eSMatt Porter rio_disc_peer(struct rio_net *net, struct rio_mport *port, u16 destid, 940eb188d0eSMatt Porter u8 hopcount) 941eb188d0eSMatt Porter { 942eb188d0eSMatt Porter u8 port_num, route_port; 943eb188d0eSMatt Porter struct rio_dev *rdev; 944eb188d0eSMatt Porter u16 ndestid; 945eb188d0eSMatt Porter 946eb188d0eSMatt Porter /* Setup new RIO device */ 947eb188d0eSMatt Porter if ((rdev = rio_setup_device(net, port, destid, hopcount, 0))) { 948eb188d0eSMatt Porter /* Add device to the global and bus/net specific list. */ 949eb188d0eSMatt Porter list_add_tail(&rdev->net_list, &net->devices); 950eb188d0eSMatt Porter } else 951eb188d0eSMatt Porter return -1; 952eb188d0eSMatt Porter 953eb188d0eSMatt Porter if (rio_is_switch(rdev)) { 954eb188d0eSMatt Porter next_switchid++; 955eb188d0eSMatt Porter 956eb188d0eSMatt Porter /* Associated destid is how we accessed this switch */ 957eb188d0eSMatt Porter rdev->rswitch->destid = destid; 958eb188d0eSMatt Porter 959eb188d0eSMatt Porter pr_debug( 960eb188d0eSMatt Porter "RIO: found %s (vid %4.4x did %4.4x) with %d ports\n", 96168fe4df5SAlexandre Bounine rio_name(rdev), rdev->vid, rdev->did, 96268fe4df5SAlexandre Bounine RIO_GET_TOTAL_PORTS(rdev->swpinfo)); 96368fe4df5SAlexandre Bounine for (port_num = 0; 96468fe4df5SAlexandre Bounine port_num < RIO_GET_TOTAL_PORTS(rdev->swpinfo); 96568fe4df5SAlexandre Bounine port_num++) { 966ae05cbd5SAlexandre Bounine if (RIO_GET_PORT_NUM(rdev->swpinfo) == port_num) 967eb188d0eSMatt Porter continue; 968eb188d0eSMatt Porter 969eb188d0eSMatt Porter if (rio_sport_is_active 970eb188d0eSMatt Porter (port, destid, hopcount, port_num)) { 971eb188d0eSMatt Porter pr_debug( 972eb188d0eSMatt Porter "RIO: scanning device on port %d\n", 973eb188d0eSMatt Porter port_num); 974818a04a0SAlexandre Bounine 975818a04a0SAlexandre Bounine rio_lock_device(port, destid, hopcount, 1000); 976818a04a0SAlexandre Bounine 977e0423236SZhang Wei for (ndestid = 0; 978e0423236SZhang Wei ndestid < RIO_ANY_DESTID(port->sys_size); 979eb188d0eSMatt Porter ndestid++) { 980c70555b0SAlexandre Bounine rio_route_get_entry(port, rdev->rswitch, 981eb188d0eSMatt Porter RIO_GLOBAL_TABLE, 982eb188d0eSMatt Porter ndestid, 983818a04a0SAlexandre Bounine &route_port, 0); 984eb188d0eSMatt Porter if (route_port == port_num) 985eb188d0eSMatt Porter break; 986eb188d0eSMatt Porter } 987eb188d0eSMatt Porter 988818a04a0SAlexandre Bounine rio_unlock_device(port, destid, hopcount); 989eb188d0eSMatt Porter if (rio_disc_peer 990eb188d0eSMatt Porter (net, port, ndestid, hopcount + 1) < 0) 991eb188d0eSMatt Porter return -1; 992eb188d0eSMatt Porter } 993eb188d0eSMatt Porter } 994eb188d0eSMatt Porter } else 995eb188d0eSMatt Porter pr_debug("RIO: found %s (vid %4.4x did %4.4x)\n", 996eb188d0eSMatt Porter rio_name(rdev), rdev->vid, rdev->did); 997eb188d0eSMatt Porter 998eb188d0eSMatt Porter return 0; 999eb188d0eSMatt Porter } 1000eb188d0eSMatt Porter 1001eb188d0eSMatt Porter /** 1002eb188d0eSMatt Porter * rio_mport_is_active- Tests if master port link is active 1003eb188d0eSMatt Porter * @port: Master port to test 1004eb188d0eSMatt Porter * 1005eb188d0eSMatt Porter * Reads the port error status CSR for the master port to 1006eb188d0eSMatt Porter * determine if the port has an active link. Returns 1007e5cabeb3SAlexandre Bounine * %RIO_PORT_N_ERR_STS_PORT_OK if the master port is active 1008eb188d0eSMatt Porter * or %0 if it is inactive. 1009eb188d0eSMatt Porter */ 1010eb188d0eSMatt Porter static int rio_mport_is_active(struct rio_mport *port) 1011eb188d0eSMatt Porter { 1012eb188d0eSMatt Porter u32 result = 0; 1013eb188d0eSMatt Porter u32 ext_ftr_ptr; 1014eb188d0eSMatt Porter int *entry = rio_mport_phys_table; 1015eb188d0eSMatt Porter 1016eb188d0eSMatt Porter do { 1017eb188d0eSMatt Porter if ((ext_ftr_ptr = 1018eb188d0eSMatt Porter rio_mport_get_feature(port, 1, 0, 0, *entry))) 1019eb188d0eSMatt Porter break; 1020eb188d0eSMatt Porter } while (*++entry >= 0); 1021eb188d0eSMatt Porter 1022eb188d0eSMatt Porter if (ext_ftr_ptr) 1023eb188d0eSMatt Porter rio_local_read_config_32(port, 1024eb188d0eSMatt Porter ext_ftr_ptr + 1025eb188d0eSMatt Porter RIO_PORT_N_ERR_STS_CSR(port->index), 1026eb188d0eSMatt Porter &result); 1027eb188d0eSMatt Porter 1028e5cabeb3SAlexandre Bounine return result & RIO_PORT_N_ERR_STS_PORT_OK; 1029eb188d0eSMatt Porter } 1030eb188d0eSMatt Porter 1031eb188d0eSMatt Porter /** 1032eb188d0eSMatt Porter * rio_alloc_net- Allocate and configure a new RIO network 1033eb188d0eSMatt Porter * @port: Master port associated with the RIO network 1034eb188d0eSMatt Porter * 1035eb188d0eSMatt Porter * Allocates a RIO network structure, initializes per-network 1036eb188d0eSMatt Porter * list heads, and adds the associated master port to the 1037eb188d0eSMatt Porter * network list of associated master ports. Returns a 1038eb188d0eSMatt Porter * RIO network pointer on success or %NULL on failure. 1039eb188d0eSMatt Porter */ 1040eb188d0eSMatt Porter static struct rio_net __devinit *rio_alloc_net(struct rio_mport *port) 1041eb188d0eSMatt Porter { 1042eb188d0eSMatt Porter struct rio_net *net; 1043eb188d0eSMatt Porter 1044dd00cc48SYoann Padioleau net = kzalloc(sizeof(struct rio_net), GFP_KERNEL); 1045eb188d0eSMatt Porter if (net) { 1046eb188d0eSMatt Porter INIT_LIST_HEAD(&net->node); 1047eb188d0eSMatt Porter INIT_LIST_HEAD(&net->devices); 1048eb188d0eSMatt Porter INIT_LIST_HEAD(&net->mports); 1049eb188d0eSMatt Porter list_add_tail(&port->nnode, &net->mports); 1050eb188d0eSMatt Porter net->hport = port; 1051eb188d0eSMatt Porter net->id = next_net++; 1052eb188d0eSMatt Porter } 1053eb188d0eSMatt Porter return net; 1054eb188d0eSMatt Porter } 1055eb188d0eSMatt Porter 1056eb188d0eSMatt Porter /** 1057c70555b0SAlexandre Bounine * rio_update_route_tables- Updates route tables in switches 1058c70555b0SAlexandre Bounine * @port: Master port associated with the RIO network 1059c70555b0SAlexandre Bounine * 1060c70555b0SAlexandre Bounine * For each enumerated device, ensure that each switch in a system 1061c70555b0SAlexandre Bounine * has correct routing entries. Add routes for devices that where 1062c70555b0SAlexandre Bounine * unknown dirung the first enumeration pass through the switch. 1063c70555b0SAlexandre Bounine */ 1064c70555b0SAlexandre Bounine static void rio_update_route_tables(struct rio_mport *port) 1065c70555b0SAlexandre Bounine { 1066c70555b0SAlexandre Bounine struct rio_dev *rdev; 1067c70555b0SAlexandre Bounine struct rio_switch *rswitch; 1068c70555b0SAlexandre Bounine u8 sport; 1069c70555b0SAlexandre Bounine u16 destid; 1070c70555b0SAlexandre Bounine 1071c70555b0SAlexandre Bounine list_for_each_entry(rdev, &rio_devices, global_list) { 1072c70555b0SAlexandre Bounine 1073c70555b0SAlexandre Bounine destid = (rio_is_switch(rdev))?rdev->rswitch->destid:rdev->destid; 1074c70555b0SAlexandre Bounine 1075c70555b0SAlexandre Bounine list_for_each_entry(rswitch, &rio_switches, node) { 1076c70555b0SAlexandre Bounine 1077c70555b0SAlexandre Bounine if (rio_is_switch(rdev) && (rdev->rswitch == rswitch)) 1078c70555b0SAlexandre Bounine continue; 1079c70555b0SAlexandre Bounine 1080c70555b0SAlexandre Bounine if (RIO_INVALID_ROUTE == rswitch->route_table[destid]) { 108107590ff0SAlexandre Bounine /* Skip if destid ends in empty switch*/ 108207590ff0SAlexandre Bounine if (rswitch->destid == destid) 108307590ff0SAlexandre Bounine continue; 1084c70555b0SAlexandre Bounine 1085ae05cbd5SAlexandre Bounine sport = RIO_GET_PORT_NUM(rswitch->rdev->swpinfo); 1086c70555b0SAlexandre Bounine 1087c70555b0SAlexandre Bounine if (rswitch->add_entry) { 1088818a04a0SAlexandre Bounine rio_route_add_entry(port, rswitch, 1089818a04a0SAlexandre Bounine RIO_GLOBAL_TABLE, destid, 1090818a04a0SAlexandre Bounine sport, 0); 1091c70555b0SAlexandre Bounine rswitch->route_table[destid] = sport; 1092c70555b0SAlexandre Bounine } 1093c70555b0SAlexandre Bounine } 1094c70555b0SAlexandre Bounine } 1095c70555b0SAlexandre Bounine } 1096c70555b0SAlexandre Bounine } 1097c70555b0SAlexandre Bounine 1098c70555b0SAlexandre Bounine /** 1099e5cabeb3SAlexandre Bounine * rio_init_em - Initializes RIO Error Management (for switches) 110097ef6f74SRandy Dunlap * @rdev: RIO device 1101e5cabeb3SAlexandre Bounine * 1102e5cabeb3SAlexandre Bounine * For each enumerated switch, call device-specific error management 1103e5cabeb3SAlexandre Bounine * initialization routine (if supplied by the switch driver). 1104e5cabeb3SAlexandre Bounine */ 1105e5cabeb3SAlexandre Bounine static void rio_init_em(struct rio_dev *rdev) 1106e5cabeb3SAlexandre Bounine { 1107e5cabeb3SAlexandre Bounine if (rio_is_switch(rdev) && (rdev->em_efptr) && 1108e5cabeb3SAlexandre Bounine (rdev->rswitch->em_init)) { 1109e5cabeb3SAlexandre Bounine rdev->rswitch->em_init(rdev); 1110e5cabeb3SAlexandre Bounine } 1111e5cabeb3SAlexandre Bounine } 1112e5cabeb3SAlexandre Bounine 1113e5cabeb3SAlexandre Bounine /** 1114e5cabeb3SAlexandre Bounine * rio_pw_enable - Enables/disables port-write handling by a master port 1115e5cabeb3SAlexandre Bounine * @port: Master port associated with port-write handling 1116e5cabeb3SAlexandre Bounine * @enable: 1=enable, 0=disable 1117e5cabeb3SAlexandre Bounine */ 1118e5cabeb3SAlexandre Bounine static void rio_pw_enable(struct rio_mport *port, int enable) 1119e5cabeb3SAlexandre Bounine { 1120e5cabeb3SAlexandre Bounine if (port->ops->pwenable) 1121e5cabeb3SAlexandre Bounine port->ops->pwenable(port, enable); 1122e5cabeb3SAlexandre Bounine } 1123e5cabeb3SAlexandre Bounine 1124e5cabeb3SAlexandre Bounine /** 1125eb188d0eSMatt Porter * rio_enum_mport- Start enumeration through a master port 1126eb188d0eSMatt Porter * @mport: Master port to send transactions 1127eb188d0eSMatt Porter * 1128eb188d0eSMatt Porter * Starts the enumeration process. If somebody has enumerated our 1129eb188d0eSMatt Porter * master port device, then give up. If not and we have an active 1130eb188d0eSMatt Porter * link, then start recursive peer enumeration. Returns %0 if 1131eb188d0eSMatt Porter * enumeration succeeds or %-EBUSY if enumeration fails. 1132eb188d0eSMatt Porter */ 113337d33d15SAl Viro int __devinit rio_enum_mport(struct rio_mport *mport) 1134eb188d0eSMatt Porter { 1135eb188d0eSMatt Porter struct rio_net *net = NULL; 1136eb188d0eSMatt Porter int rc = 0; 1137eb188d0eSMatt Porter 1138eb188d0eSMatt Porter printk(KERN_INFO "RIO: enumerate master port %d, %s\n", mport->id, 1139eb188d0eSMatt Porter mport->name); 1140eb188d0eSMatt Porter /* If somebody else enumerated our master port device, bail. */ 1141eb188d0eSMatt Porter if (rio_enum_host(mport) < 0) { 1142eb188d0eSMatt Porter printk(KERN_INFO 1143eb188d0eSMatt Porter "RIO: master port %d device has been enumerated by a remote host\n", 1144eb188d0eSMatt Porter mport->id); 1145eb188d0eSMatt Porter rc = -EBUSY; 1146eb188d0eSMatt Porter goto out; 1147eb188d0eSMatt Porter } 1148eb188d0eSMatt Porter 1149eb188d0eSMatt Porter /* If master port has an active link, allocate net and enum peers */ 1150eb188d0eSMatt Porter if (rio_mport_is_active(mport)) { 1151eb188d0eSMatt Porter if (!(net = rio_alloc_net(mport))) { 1152eb188d0eSMatt Porter printk(KERN_ERR "RIO: failed to allocate new net\n"); 1153eb188d0eSMatt Porter rc = -ENOMEM; 1154eb188d0eSMatt Porter goto out; 1155eb188d0eSMatt Porter } 1156933af4a6SThomas Moll 1157933af4a6SThomas Moll /* Enable Input Output Port (transmitter reviever) */ 1158933af4a6SThomas Moll rio_enable_rx_tx_port(mport, 1, 0, 0, 0); 1159933af4a6SThomas Moll 116068fe4df5SAlexandre Bounine if (rio_enum_peer(net, mport, 0, NULL, 0) < 0) { 1161eb188d0eSMatt Porter /* A higher priority host won enumeration, bail. */ 1162eb188d0eSMatt Porter printk(KERN_INFO 1163eb188d0eSMatt Porter "RIO: master port %d device has lost enumeration to a remote host\n", 1164eb188d0eSMatt Porter mport->id); 1165eb188d0eSMatt Porter rio_clear_locks(mport); 1166eb188d0eSMatt Porter rc = -EBUSY; 1167eb188d0eSMatt Porter goto out; 1168eb188d0eSMatt Porter } 1169c70555b0SAlexandre Bounine rio_update_route_tables(mport); 1170eb188d0eSMatt Porter rio_clear_locks(mport); 1171e5cabeb3SAlexandre Bounine rio_pw_enable(mport, 1); 1172eb188d0eSMatt Porter } else { 1173eb188d0eSMatt Porter printk(KERN_INFO "RIO: master port %d link inactive\n", 1174eb188d0eSMatt Porter mport->id); 1175eb188d0eSMatt Porter rc = -EINVAL; 1176eb188d0eSMatt Porter } 1177eb188d0eSMatt Porter 1178eb188d0eSMatt Porter out: 1179eb188d0eSMatt Porter return rc; 1180eb188d0eSMatt Porter } 1181eb188d0eSMatt Porter 1182eb188d0eSMatt Porter /** 1183eb188d0eSMatt Porter * rio_build_route_tables- Generate route tables from switch route entries 1184eb188d0eSMatt Porter * 1185eb188d0eSMatt Porter * For each switch device, generate a route table by copying existing 1186eb188d0eSMatt Porter * route entries from the switch. 1187eb188d0eSMatt Porter */ 1188eb188d0eSMatt Porter static void rio_build_route_tables(void) 1189eb188d0eSMatt Porter { 1190eb188d0eSMatt Porter struct rio_dev *rdev; 1191eb188d0eSMatt Porter int i; 1192eb188d0eSMatt Porter u8 sport; 1193eb188d0eSMatt Porter 1194eb188d0eSMatt Porter list_for_each_entry(rdev, &rio_devices, global_list) 1195818a04a0SAlexandre Bounine if (rio_is_switch(rdev)) { 1196818a04a0SAlexandre Bounine rio_lock_device(rdev->net->hport, rdev->rswitch->destid, 1197818a04a0SAlexandre Bounine rdev->rswitch->hopcount, 1000); 1198e0423236SZhang Wei for (i = 0; 1199e0423236SZhang Wei i < RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size); 1200e0423236SZhang Wei i++) { 1201eb188d0eSMatt Porter if (rio_route_get_entry 1202818a04a0SAlexandre Bounine (rdev->net->hport, rdev->rswitch, 1203818a04a0SAlexandre Bounine RIO_GLOBAL_TABLE, i, &sport, 0) < 0) 1204eb188d0eSMatt Porter continue; 1205eb188d0eSMatt Porter rdev->rswitch->route_table[i] = sport; 1206eb188d0eSMatt Porter } 1207818a04a0SAlexandre Bounine 1208818a04a0SAlexandre Bounine rio_unlock_device(rdev->net->hport, 1209818a04a0SAlexandre Bounine rdev->rswitch->destid, 1210818a04a0SAlexandre Bounine rdev->rswitch->hopcount); 1211818a04a0SAlexandre Bounine } 1212eb188d0eSMatt Porter } 1213eb188d0eSMatt Porter 1214eb188d0eSMatt Porter /** 1215eb188d0eSMatt Porter * rio_enum_timeout- Signal that enumeration timed out 1216eb188d0eSMatt Porter * @data: Address of timeout flag. 1217eb188d0eSMatt Porter * 1218eb188d0eSMatt Porter * When the enumeration complete timer expires, set a flag that 1219eb188d0eSMatt Porter * signals to the discovery process that enumeration did not 1220eb188d0eSMatt Porter * complete in a sane amount of time. 1221eb188d0eSMatt Porter */ 1222eb188d0eSMatt Porter static void rio_enum_timeout(unsigned long data) 1223eb188d0eSMatt Porter { 1224eb188d0eSMatt Porter /* Enumeration timed out, set flag */ 1225eb188d0eSMatt Porter *(int *)data = 1; 1226eb188d0eSMatt Porter } 1227eb188d0eSMatt Porter 1228eb188d0eSMatt Porter /** 1229eb188d0eSMatt Porter * rio_disc_mport- Start discovery through a master port 1230eb188d0eSMatt Porter * @mport: Master port to send transactions 1231eb188d0eSMatt Porter * 1232eb188d0eSMatt Porter * Starts the discovery process. If we have an active link, 1233eb188d0eSMatt Porter * then wait for the signal that enumeration is complete. 1234eb188d0eSMatt Porter * When enumeration completion is signaled, start recursive 1235eb188d0eSMatt Porter * peer discovery. Returns %0 if discovery succeeds or %-EBUSY 1236eb188d0eSMatt Porter * on failure. 1237eb188d0eSMatt Porter */ 123837d33d15SAl Viro int __devinit rio_disc_mport(struct rio_mport *mport) 1239eb188d0eSMatt Porter { 1240eb188d0eSMatt Porter struct rio_net *net = NULL; 1241eb188d0eSMatt Porter int enum_timeout_flag = 0; 1242eb188d0eSMatt Porter 1243eb188d0eSMatt Porter printk(KERN_INFO "RIO: discover master port %d, %s\n", mport->id, 1244eb188d0eSMatt Porter mport->name); 1245eb188d0eSMatt Porter 1246eb188d0eSMatt Porter /* If master port has an active link, allocate net and discover peers */ 1247eb188d0eSMatt Porter if (rio_mport_is_active(mport)) { 1248eb188d0eSMatt Porter if (!(net = rio_alloc_net(mport))) { 1249eb188d0eSMatt Porter printk(KERN_ERR "RIO: Failed to allocate new net\n"); 1250eb188d0eSMatt Porter goto bail; 1251eb188d0eSMatt Porter } 1252eb188d0eSMatt Porter 1253eb188d0eSMatt Porter pr_debug("RIO: wait for enumeration complete..."); 1254eb188d0eSMatt Porter 1255eb188d0eSMatt Porter rio_enum_timer.expires = 1256eb188d0eSMatt Porter jiffies + CONFIG_RAPIDIO_DISC_TIMEOUT * HZ; 1257eb188d0eSMatt Porter rio_enum_timer.data = (unsigned long)&enum_timeout_flag; 1258eb188d0eSMatt Porter add_timer(&rio_enum_timer); 1259eb188d0eSMatt Porter while (!rio_enum_complete(mport)) { 1260eb188d0eSMatt Porter mdelay(1); 1261eb188d0eSMatt Porter if (enum_timeout_flag) { 1262eb188d0eSMatt Porter del_timer_sync(&rio_enum_timer); 1263eb188d0eSMatt Porter goto timeout; 1264eb188d0eSMatt Porter } 1265eb188d0eSMatt Porter } 1266eb188d0eSMatt Porter del_timer_sync(&rio_enum_timer); 1267eb188d0eSMatt Porter 1268eb188d0eSMatt Porter pr_debug("done\n"); 1269818a04a0SAlexandre Bounine 1270818a04a0SAlexandre Bounine /* Read DestID assigned by enumerator */ 1271818a04a0SAlexandre Bounine rio_local_read_config_32(mport, RIO_DID_CSR, 1272818a04a0SAlexandre Bounine &mport->host_deviceid); 1273818a04a0SAlexandre Bounine mport->host_deviceid = RIO_GET_DID(mport->sys_size, 1274818a04a0SAlexandre Bounine mport->host_deviceid); 1275818a04a0SAlexandre Bounine 1276e0423236SZhang Wei if (rio_disc_peer(net, mport, RIO_ANY_DESTID(mport->sys_size), 1277e0423236SZhang Wei 0) < 0) { 1278eb188d0eSMatt Porter printk(KERN_INFO 1279eb188d0eSMatt Porter "RIO: master port %d device has failed discovery\n", 1280eb188d0eSMatt Porter mport->id); 1281eb188d0eSMatt Porter goto bail; 1282eb188d0eSMatt Porter } 1283eb188d0eSMatt Porter 1284eb188d0eSMatt Porter rio_build_route_tables(); 1285eb188d0eSMatt Porter } 1286eb188d0eSMatt Porter 1287eb188d0eSMatt Porter return 0; 1288eb188d0eSMatt Porter 1289eb188d0eSMatt Porter timeout: 1290eb188d0eSMatt Porter pr_debug("timeout\n"); 1291eb188d0eSMatt Porter bail: 1292eb188d0eSMatt Porter return -EBUSY; 1293eb188d0eSMatt Porter } 1294