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; 51af84ca38SAlexandre Bounine static int next_comptag = 1; 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 124eb188d0eSMatt Porter /* Release host device id locks */ 125eb188d0eSMatt Porter rio_local_write_config_32(port, RIO_HOST_DID_LOCK_CSR, 126eb188d0eSMatt Porter port->host_deviceid); 127eb188d0eSMatt Porter rio_local_read_config_32(port, RIO_HOST_DID_LOCK_CSR, &result); 128eb188d0eSMatt Porter if ((result & 0xffff) != 0xffff) { 129eb188d0eSMatt Porter printk(KERN_INFO 130eb188d0eSMatt Porter "RIO: badness when releasing host lock on master port, result %8.8x\n", 131eb188d0eSMatt Porter result); 132eb188d0eSMatt Porter ret = -EINVAL; 133eb188d0eSMatt Porter } 134eb188d0eSMatt Porter list_for_each_entry(rdev, &rio_devices, global_list) { 135eb188d0eSMatt Porter rio_write_config_32(rdev, RIO_HOST_DID_LOCK_CSR, 136eb188d0eSMatt Porter port->host_deviceid); 137eb188d0eSMatt Porter rio_read_config_32(rdev, RIO_HOST_DID_LOCK_CSR, &result); 138eb188d0eSMatt Porter if ((result & 0xffff) != 0xffff) { 139eb188d0eSMatt Porter printk(KERN_INFO 140eb188d0eSMatt Porter "RIO: badness when releasing host lock on vid %4.4x did %4.4x\n", 141eb188d0eSMatt Porter rdev->vid, rdev->did); 142eb188d0eSMatt Porter ret = -EINVAL; 143eb188d0eSMatt Porter } 144af84ca38SAlexandre Bounine 145af84ca38SAlexandre Bounine /* Mark device as discovered and enable master */ 146af84ca38SAlexandre Bounine rio_read_config_32(rdev, 147af84ca38SAlexandre Bounine rdev->phys_efptr + RIO_PORT_GEN_CTL_CSR, 148af84ca38SAlexandre Bounine &result); 149af84ca38SAlexandre Bounine result |= RIO_PORT_GEN_DISCOVERED | RIO_PORT_GEN_MASTER; 150af84ca38SAlexandre Bounine rio_write_config_32(rdev, 151af84ca38SAlexandre Bounine rdev->phys_efptr + RIO_PORT_GEN_CTL_CSR, 152af84ca38SAlexandre Bounine result); 153eb188d0eSMatt Porter } 154eb188d0eSMatt Porter 155eb188d0eSMatt Porter return ret; 156eb188d0eSMatt Porter } 157eb188d0eSMatt Porter 158eb188d0eSMatt Porter /** 159eb188d0eSMatt Porter * rio_enum_host- Set host lock and initialize host destination ID 160eb188d0eSMatt Porter * @port: Master port to issue transaction 161eb188d0eSMatt Porter * 162eb188d0eSMatt Porter * Sets the local host master port lock and destination ID register 163eb188d0eSMatt Porter * with the host device ID value. The host device ID value is provided 164eb188d0eSMatt Porter * by the platform. Returns %0 on success or %-1 on failure. 165eb188d0eSMatt Porter */ 166eb188d0eSMatt Porter static int rio_enum_host(struct rio_mport *port) 167eb188d0eSMatt Porter { 168eb188d0eSMatt Porter u32 result; 169eb188d0eSMatt Porter 170eb188d0eSMatt Porter /* Set master port host device id lock */ 171eb188d0eSMatt Porter rio_local_write_config_32(port, RIO_HOST_DID_LOCK_CSR, 172eb188d0eSMatt Porter port->host_deviceid); 173eb188d0eSMatt Porter 174eb188d0eSMatt Porter rio_local_read_config_32(port, RIO_HOST_DID_LOCK_CSR, &result); 175eb188d0eSMatt Porter if ((result & 0xffff) != port->host_deviceid) 176eb188d0eSMatt Porter return -1; 177eb188d0eSMatt Porter 178eb188d0eSMatt Porter /* Set master port destid and init destid ctr */ 179eb188d0eSMatt Porter rio_local_set_device_id(port, port->host_deviceid); 180eb188d0eSMatt Porter 181eb188d0eSMatt Porter if (next_destid == port->host_deviceid) 182eb188d0eSMatt Porter next_destid++; 183eb188d0eSMatt Porter 184eb188d0eSMatt Porter return 0; 185eb188d0eSMatt Porter } 186eb188d0eSMatt Porter 187eb188d0eSMatt Porter /** 188eb188d0eSMatt Porter * rio_device_has_destid- Test if a device contains a destination ID register 189eb188d0eSMatt Porter * @port: Master port to issue transaction 190eb188d0eSMatt Porter * @src_ops: RIO device source operations 191eb188d0eSMatt Porter * @dst_ops: RIO device destination operations 192eb188d0eSMatt Porter * 193eb188d0eSMatt Porter * Checks the provided @src_ops and @dst_ops for the necessary transaction 194eb188d0eSMatt Porter * capabilities that indicate whether or not a device will implement a 195eb188d0eSMatt Porter * destination ID register. Returns 1 if true or 0 if false. 196eb188d0eSMatt Porter */ 197eb188d0eSMatt Porter static int rio_device_has_destid(struct rio_mport *port, int src_ops, 198eb188d0eSMatt Porter int dst_ops) 199eb188d0eSMatt Porter { 200fa78cc51SMatt 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; 201fa78cc51SMatt Porter 202fa78cc51SMatt Porter return !!((src_ops | dst_ops) & mask); 203eb188d0eSMatt Porter } 204eb188d0eSMatt Porter 205eb188d0eSMatt Porter /** 206eb188d0eSMatt Porter * rio_release_dev- Frees a RIO device struct 207eb188d0eSMatt Porter * @dev: LDM device associated with a RIO device struct 208eb188d0eSMatt Porter * 209eb188d0eSMatt Porter * Gets the RIO device struct associated a RIO device struct. 210eb188d0eSMatt Porter * The RIO device struct is freed. 211eb188d0eSMatt Porter */ 212eb188d0eSMatt Porter static void rio_release_dev(struct device *dev) 213eb188d0eSMatt Porter { 214eb188d0eSMatt Porter struct rio_dev *rdev; 215eb188d0eSMatt Porter 216eb188d0eSMatt Porter rdev = to_rio_dev(dev); 217eb188d0eSMatt Porter kfree(rdev); 218eb188d0eSMatt Porter } 219eb188d0eSMatt Porter 220eb188d0eSMatt Porter /** 221eb188d0eSMatt Porter * rio_is_switch- Tests if a RIO device has switch capabilities 222eb188d0eSMatt Porter * @rdev: RIO device 223eb188d0eSMatt Porter * 224eb188d0eSMatt Porter * Gets the RIO device Processing Element Features register 225eb188d0eSMatt Porter * contents and tests for switch capabilities. Returns 1 if 226eb188d0eSMatt Porter * the device is a switch or 0 if it is not a switch. 227eb188d0eSMatt Porter * The RIO device struct is freed. 228eb188d0eSMatt Porter */ 229eb188d0eSMatt Porter static int rio_is_switch(struct rio_dev *rdev) 230eb188d0eSMatt Porter { 231eb188d0eSMatt Porter if (rdev->pef & RIO_PEF_SWITCH) 232eb188d0eSMatt Porter return 1; 233eb188d0eSMatt Porter return 0; 234eb188d0eSMatt Porter } 235eb188d0eSMatt Porter 236eb188d0eSMatt Porter /** 237058f88d6SAlexandre Bounine * rio_switch_init - Sets switch operations for a particular vendor switch 238eb188d0eSMatt Porter * @rdev: RIO device 239058f88d6SAlexandre Bounine * @do_enum: Enumeration/Discovery mode flag 240eb188d0eSMatt Porter * 241058f88d6SAlexandre Bounine * Searches the RIO switch ops table for known switch types. If the vid 242058f88d6SAlexandre Bounine * and did match a switch table entry, then call switch initialization 243058f88d6SAlexandre Bounine * routine to setup switch-specific routines. 244eb188d0eSMatt Porter */ 245058f88d6SAlexandre Bounine static void rio_switch_init(struct rio_dev *rdev, int do_enum) 246eb188d0eSMatt Porter { 247058f88d6SAlexandre Bounine struct rio_switch_ops *cur = __start_rio_switch_ops; 248058f88d6SAlexandre Bounine struct rio_switch_ops *end = __end_rio_switch_ops; 249eb188d0eSMatt Porter 250eb188d0eSMatt Porter while (cur < end) { 251eb188d0eSMatt Porter if ((cur->vid == rdev->vid) && (cur->did == rdev->did)) { 252058f88d6SAlexandre Bounine pr_debug("RIO: calling init routine for %s\n", 253058f88d6SAlexandre Bounine rio_name(rdev)); 254058f88d6SAlexandre Bounine cur->init_hook(rdev, do_enum); 25507590ff0SAlexandre Bounine break; 256eb188d0eSMatt Porter } 257eb188d0eSMatt Porter cur++; 258eb188d0eSMatt Porter } 259eb188d0eSMatt Porter 26007590ff0SAlexandre Bounine if ((cur >= end) && (rdev->pef & RIO_PEF_STD_RT)) { 26107590ff0SAlexandre Bounine pr_debug("RIO: adding STD routing ops for %s\n", 26207590ff0SAlexandre Bounine rio_name(rdev)); 26307590ff0SAlexandre Bounine rdev->rswitch->add_entry = rio_std_route_add_entry; 26407590ff0SAlexandre Bounine rdev->rswitch->get_entry = rio_std_route_get_entry; 26507590ff0SAlexandre Bounine rdev->rswitch->clr_table = rio_std_route_clr_table; 26607590ff0SAlexandre Bounine } 26707590ff0SAlexandre Bounine 268eb188d0eSMatt Porter if (!rdev->rswitch->add_entry || !rdev->rswitch->get_entry) 269eb188d0eSMatt Porter printk(KERN_ERR "RIO: missing routing ops for %s\n", 270eb188d0eSMatt Porter rio_name(rdev)); 271eb188d0eSMatt Porter } 272eb188d0eSMatt Porter 273eb188d0eSMatt Porter /** 274eb188d0eSMatt Porter * rio_add_device- Adds a RIO device to the device model 275eb188d0eSMatt Porter * @rdev: RIO device 276eb188d0eSMatt Porter * 277eb188d0eSMatt Porter * Adds the RIO device to the global device list and adds the RIO 278eb188d0eSMatt Porter * device to the RIO device list. Creates the generic sysfs nodes 279eb188d0eSMatt Porter * for an RIO device. 280eb188d0eSMatt Porter */ 2815f28c520SYang Li static int __devinit rio_add_device(struct rio_dev *rdev) 282eb188d0eSMatt Porter { 2835f28c520SYang Li int err; 2845f28c520SYang Li 2855f28c520SYang Li err = device_add(&rdev->dev); 2865f28c520SYang Li if (err) 2875f28c520SYang Li return err; 288eb188d0eSMatt Porter 289eb188d0eSMatt Porter spin_lock(&rio_global_list_lock); 290eb188d0eSMatt Porter list_add_tail(&rdev->global_list, &rio_devices); 291eb188d0eSMatt Porter spin_unlock(&rio_global_list_lock); 292eb188d0eSMatt Porter 293eb188d0eSMatt Porter rio_create_sysfs_dev_files(rdev); 2945f28c520SYang Li 2955f28c520SYang Li return 0; 296eb188d0eSMatt Porter } 297eb188d0eSMatt Porter 298eb188d0eSMatt Porter /** 299933af4a6SThomas Moll * rio_enable_rx_tx_port - enable input reciever and output transmitter of 300933af4a6SThomas Moll * given port 301933af4a6SThomas Moll * @port: Master port associated with the RIO network 302933af4a6SThomas Moll * @local: local=1 select local port otherwise a far device is reached 303933af4a6SThomas Moll * @destid: Destination ID of the device to check host bit 304933af4a6SThomas Moll * @hopcount: Number of hops to reach the target 305933af4a6SThomas Moll * @port_num: Port (-number on switch) to enable on a far end device 306933af4a6SThomas Moll * 307933af4a6SThomas Moll * Returns 0 or 1 from on General Control Command and Status Register 308933af4a6SThomas Moll * (EXT_PTR+0x3C) 309933af4a6SThomas Moll */ 310933af4a6SThomas Moll inline int rio_enable_rx_tx_port(struct rio_mport *port, 311933af4a6SThomas Moll int local, u16 destid, 312933af4a6SThomas Moll u8 hopcount, u8 port_num) { 313933af4a6SThomas Moll #ifdef CONFIG_RAPIDIO_ENABLE_RX_TX_PORTS 314933af4a6SThomas Moll u32 regval; 315933af4a6SThomas Moll u32 ext_ftr_ptr; 316933af4a6SThomas Moll 317933af4a6SThomas Moll /* 318933af4a6SThomas Moll * enable rx input tx output port 319933af4a6SThomas Moll */ 320933af4a6SThomas Moll pr_debug("rio_enable_rx_tx_port(local = %d, destid = %d, hopcount = " 321933af4a6SThomas Moll "%d, port_num = %d)\n", local, destid, hopcount, port_num); 322933af4a6SThomas Moll 323933af4a6SThomas Moll ext_ftr_ptr = rio_mport_get_physefb(port, local, destid, hopcount); 324933af4a6SThomas Moll 325933af4a6SThomas Moll if (local) { 326933af4a6SThomas Moll rio_local_read_config_32(port, ext_ftr_ptr + 327933af4a6SThomas Moll RIO_PORT_N_CTL_CSR(0), 328933af4a6SThomas Moll ®val); 329933af4a6SThomas Moll } else { 330933af4a6SThomas Moll if (rio_mport_read_config_32(port, destid, hopcount, 331933af4a6SThomas Moll ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), ®val) < 0) 332933af4a6SThomas Moll return -EIO; 333933af4a6SThomas Moll } 334933af4a6SThomas Moll 335933af4a6SThomas Moll if (regval & RIO_PORT_N_CTL_P_TYP_SER) { 336933af4a6SThomas Moll /* serial */ 337933af4a6SThomas Moll regval = regval | RIO_PORT_N_CTL_EN_RX_SER 338933af4a6SThomas Moll | RIO_PORT_N_CTL_EN_TX_SER; 339933af4a6SThomas Moll } else { 340933af4a6SThomas Moll /* parallel */ 341933af4a6SThomas Moll regval = regval | RIO_PORT_N_CTL_EN_RX_PAR 342933af4a6SThomas Moll | RIO_PORT_N_CTL_EN_TX_PAR; 343933af4a6SThomas Moll } 344933af4a6SThomas Moll 345933af4a6SThomas Moll if (local) { 346933af4a6SThomas Moll rio_local_write_config_32(port, ext_ftr_ptr + 347933af4a6SThomas Moll RIO_PORT_N_CTL_CSR(0), regval); 348933af4a6SThomas Moll } else { 349933af4a6SThomas Moll if (rio_mport_write_config_32(port, destid, hopcount, 350933af4a6SThomas Moll ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), regval) < 0) 351933af4a6SThomas Moll return -EIO; 352933af4a6SThomas Moll } 353933af4a6SThomas Moll #endif 354933af4a6SThomas Moll return 0; 355933af4a6SThomas Moll } 356933af4a6SThomas Moll 357933af4a6SThomas Moll /** 358eb188d0eSMatt Porter * rio_setup_device- Allocates and sets up a RIO device 359eb188d0eSMatt Porter * @net: RIO network 360eb188d0eSMatt Porter * @port: Master port to send transactions 361eb188d0eSMatt Porter * @destid: Current destination ID 362eb188d0eSMatt Porter * @hopcount: Current hopcount 363eb188d0eSMatt Porter * @do_enum: Enumeration/Discovery mode flag 364eb188d0eSMatt Porter * 365eb188d0eSMatt Porter * Allocates a RIO device and configures fields based on configuration 366eb188d0eSMatt Porter * space contents. If device has a destination ID register, a destination 367eb188d0eSMatt Porter * ID is either assigned in enumeration mode or read from configuration 368eb188d0eSMatt Porter * space in discovery mode. If the device has switch capabilities, then 369eb188d0eSMatt Porter * a switch is allocated and configured appropriately. Returns a pointer 370eb188d0eSMatt Porter * to a RIO device on success or NULL on failure. 371eb188d0eSMatt Porter * 372eb188d0eSMatt Porter */ 373181a6ff0SLi Yang static struct rio_dev __devinit *rio_setup_device(struct rio_net *net, 374eb188d0eSMatt Porter struct rio_mport *port, u16 destid, 375eb188d0eSMatt Porter u8 hopcount, int do_enum) 376eb188d0eSMatt Porter { 3775f28c520SYang Li int ret = 0; 378eb188d0eSMatt Porter struct rio_dev *rdev; 3795f28c520SYang Li struct rio_switch *rswitch = NULL; 380eb188d0eSMatt Porter int result, rdid; 381ded05782SAlexandre Bounine size_t size; 382ded05782SAlexandre Bounine u32 swpinfo = 0; 383eb188d0eSMatt Porter 384ded05782SAlexandre Bounine size = sizeof(struct rio_dev); 385ded05782SAlexandre Bounine if (rio_mport_read_config_32(port, destid, hopcount, 386ded05782SAlexandre Bounine RIO_PEF_CAR, &result)) 387ded05782SAlexandre Bounine return NULL; 388ded05782SAlexandre Bounine 389ded05782SAlexandre Bounine if (result & (RIO_PEF_SWITCH | RIO_PEF_MULTIPORT)) { 390ded05782SAlexandre Bounine rio_mport_read_config_32(port, destid, hopcount, 391ded05782SAlexandre Bounine RIO_SWP_INFO_CAR, &swpinfo); 392ded05782SAlexandre Bounine if (result & RIO_PEF_SWITCH) { 393ded05782SAlexandre Bounine size += (RIO_GET_TOTAL_PORTS(swpinfo) * 394ded05782SAlexandre Bounine sizeof(rswitch->nextdev[0])) + sizeof(*rswitch); 395ded05782SAlexandre Bounine } 396ded05782SAlexandre Bounine } 397ded05782SAlexandre Bounine 398ded05782SAlexandre Bounine rdev = kzalloc(size, GFP_KERNEL); 399eb188d0eSMatt Porter if (!rdev) 4005f28c520SYang Li return NULL; 401eb188d0eSMatt Porter 402eb188d0eSMatt Porter rdev->net = net; 403ded05782SAlexandre Bounine rdev->pef = result; 404ded05782SAlexandre Bounine rdev->swpinfo = swpinfo; 405eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, RIO_DEV_ID_CAR, 406eb188d0eSMatt Porter &result); 407eb188d0eSMatt Porter rdev->did = result >> 16; 408eb188d0eSMatt Porter rdev->vid = result & 0xffff; 409eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, RIO_DEV_INFO_CAR, 410eb188d0eSMatt Porter &rdev->device_rev); 411eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, RIO_ASM_ID_CAR, 412eb188d0eSMatt Porter &result); 413eb188d0eSMatt Porter rdev->asm_did = result >> 16; 414eb188d0eSMatt Porter rdev->asm_vid = result & 0xffff; 415eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, RIO_ASM_INFO_CAR, 416eb188d0eSMatt Porter &result); 417eb188d0eSMatt Porter rdev->asm_rev = result >> 16; 418e5cabeb3SAlexandre Bounine if (rdev->pef & RIO_PEF_EXT_FEATURES) { 419eb188d0eSMatt Porter rdev->efptr = result & 0xffff; 420e5cabeb3SAlexandre Bounine rdev->phys_efptr = rio_mport_get_physefb(port, 0, destid, 421e5cabeb3SAlexandre Bounine hopcount); 422e5cabeb3SAlexandre Bounine 423e5cabeb3SAlexandre Bounine rdev->em_efptr = rio_mport_get_feature(port, 0, destid, 424e5cabeb3SAlexandre Bounine hopcount, RIO_EFB_ERR_MGMNT); 425e5cabeb3SAlexandre Bounine } 426eb188d0eSMatt Porter 427eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, RIO_SRC_OPS_CAR, 428eb188d0eSMatt Porter &rdev->src_ops); 429eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, RIO_DST_OPS_CAR, 430eb188d0eSMatt Porter &rdev->dst_ops); 431eb188d0eSMatt Porter 432af84ca38SAlexandre Bounine if (do_enum) { 433af84ca38SAlexandre Bounine /* Assign component tag to device */ 434af84ca38SAlexandre Bounine if (next_comptag >= 0x10000) { 435af84ca38SAlexandre Bounine pr_err("RIO: Component Tag Counter Overflow\n"); 436af84ca38SAlexandre Bounine goto cleanup; 437af84ca38SAlexandre Bounine } 438af84ca38SAlexandre Bounine rio_mport_write_config_32(port, destid, hopcount, 439af84ca38SAlexandre Bounine RIO_COMPONENT_TAG_CSR, next_comptag); 440af84ca38SAlexandre Bounine rdev->comp_tag = next_comptag++; 441af84ca38SAlexandre Bounine } 442af84ca38SAlexandre Bounine 443c70555b0SAlexandre Bounine if (rio_device_has_destid(port, rdev->src_ops, rdev->dst_ops)) { 444c70555b0SAlexandre Bounine if (do_enum) { 445eb188d0eSMatt Porter rio_set_device_id(port, destid, hopcount, next_destid); 446eb188d0eSMatt Porter rdev->destid = next_destid++; 447eb188d0eSMatt Porter if (next_destid == port->host_deviceid) 448eb188d0eSMatt Porter next_destid++; 449eb188d0eSMatt Porter } else 450eb188d0eSMatt Porter rdev->destid = rio_get_device_id(port, destid, hopcount); 451a93192a5SAlexandre Bounine 452a93192a5SAlexandre Bounine rdev->hopcount = 0xff; 453a93192a5SAlexandre Bounine } else { 454a93192a5SAlexandre Bounine /* Switch device has an associated destID which 455a93192a5SAlexandre Bounine * will be adjusted later 456a93192a5SAlexandre Bounine */ 457a93192a5SAlexandre Bounine rdev->destid = destid; 458a93192a5SAlexandre Bounine rdev->hopcount = hopcount; 459a93192a5SAlexandre Bounine } 460eb188d0eSMatt Porter 461eb188d0eSMatt Porter /* If a PE has both switch and other functions, show it as a switch */ 462eb188d0eSMatt Porter if (rio_is_switch(rdev)) { 463ded05782SAlexandre Bounine rswitch = rdev->rswitch; 464eb188d0eSMatt Porter rswitch->switchid = next_switchid; 465e5cabeb3SAlexandre Bounine rswitch->port_ok = 0; 466e0423236SZhang Wei rswitch->route_table = kzalloc(sizeof(u8)* 467e0423236SZhang Wei RIO_MAX_ROUTE_ENTRIES(port->sys_size), 468e0423236SZhang Wei GFP_KERNEL); 4695f28c520SYang Li if (!rswitch->route_table) 4705f28c520SYang Li goto cleanup; 471eb188d0eSMatt Porter /* Initialize switch route table */ 472e0423236SZhang Wei for (rdid = 0; rdid < RIO_MAX_ROUTE_ENTRIES(port->sys_size); 473e0423236SZhang Wei rdid++) 474eb188d0eSMatt Porter rswitch->route_table[rdid] = RIO_INVALID_ROUTE; 475b53c7583SKay Sievers dev_set_name(&rdev->dev, "%02x:s:%04x", rdev->net->id, 476ded05782SAlexandre Bounine rswitch->switchid); 477058f88d6SAlexandre Bounine rio_switch_init(rdev, do_enum); 478eb188d0eSMatt Porter 479ded05782SAlexandre Bounine if (do_enum && rswitch->clr_table) 480ded05782SAlexandre Bounine rswitch->clr_table(port, destid, hopcount, 48107590ff0SAlexandre Bounine RIO_GLOBAL_TABLE); 48207590ff0SAlexandre Bounine 483eb188d0eSMatt Porter list_add_tail(&rswitch->node, &rio_switches); 484eb188d0eSMatt Porter 485933af4a6SThomas Moll } else { 486933af4a6SThomas Moll if (do_enum) 487933af4a6SThomas Moll /*Enable Input Output Port (transmitter reviever)*/ 488933af4a6SThomas Moll rio_enable_rx_tx_port(port, 0, destid, hopcount, 0); 489933af4a6SThomas Moll 490b53c7583SKay Sievers dev_set_name(&rdev->dev, "%02x:e:%04x", rdev->net->id, 491eb188d0eSMatt Porter rdev->destid); 492933af4a6SThomas Moll } 493eb188d0eSMatt Porter 494eb188d0eSMatt Porter rdev->dev.bus = &rio_bus_type; 4952c70f022SAlexandre Bounine rdev->dev.parent = &rio_bus; 496eb188d0eSMatt Porter 497eb188d0eSMatt Porter device_initialize(&rdev->dev); 498eb188d0eSMatt Porter rdev->dev.release = rio_release_dev; 499eb188d0eSMatt Porter rio_dev_get(rdev); 500eb188d0eSMatt Porter 501284901a9SYang Hongyang rdev->dma_mask = DMA_BIT_MASK(32); 502fa78cc51SMatt Porter rdev->dev.dma_mask = &rdev->dma_mask; 503284901a9SYang Hongyang rdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); 504eb188d0eSMatt Porter 505eb188d0eSMatt Porter if ((rdev->pef & RIO_PEF_INB_DOORBELL) && 506eb188d0eSMatt Porter (rdev->dst_ops & RIO_DST_OPS_DOORBELL)) 507eb188d0eSMatt Porter rio_init_dbell_res(&rdev->riores[RIO_DOORBELL_RESOURCE], 508eb188d0eSMatt Porter 0, 0xffff); 509eb188d0eSMatt Porter 5105f28c520SYang Li ret = rio_add_device(rdev); 5115f28c520SYang Li if (ret) 5125f28c520SYang Li goto cleanup; 513eb188d0eSMatt Porter 514eb188d0eSMatt Porter return rdev; 5155f28c520SYang Li 5165f28c520SYang Li cleanup: 517ded05782SAlexandre Bounine if (rswitch->route_table) 5185f28c520SYang Li kfree(rswitch->route_table); 519ded05782SAlexandre Bounine 5205f28c520SYang Li kfree(rdev); 5215f28c520SYang Li return NULL; 522eb188d0eSMatt Porter } 523eb188d0eSMatt Porter 524eb188d0eSMatt Porter /** 525eb188d0eSMatt Porter * rio_sport_is_active- Tests if a switch port has an active connection. 526eb188d0eSMatt Porter * @port: Master port to send transaction 527eb188d0eSMatt Porter * @destid: Associated destination ID for switch 528eb188d0eSMatt Porter * @hopcount: Hopcount to reach switch 529eb188d0eSMatt Porter * @sport: Switch port number 530eb188d0eSMatt Porter * 531eb188d0eSMatt Porter * Reads the port error status CSR for a particular switch port to 532eb188d0eSMatt Porter * determine if the port has an active link. Returns 533e5cabeb3SAlexandre Bounine * %RIO_PORT_N_ERR_STS_PORT_OK if the port is active or %0 if it is 534eb188d0eSMatt Porter * inactive. 535eb188d0eSMatt Porter */ 536eb188d0eSMatt Porter static int 537eb188d0eSMatt Porter rio_sport_is_active(struct rio_mport *port, u16 destid, u8 hopcount, int sport) 538eb188d0eSMatt Porter { 539e5cabeb3SAlexandre Bounine u32 result = 0; 540eb188d0eSMatt Porter u32 ext_ftr_ptr; 541eb188d0eSMatt Porter 542e5cabeb3SAlexandre Bounine ext_ftr_ptr = rio_mport_get_efb(port, 0, destid, hopcount, 0); 543eb188d0eSMatt Porter 544e5cabeb3SAlexandre Bounine while (ext_ftr_ptr) { 545e5cabeb3SAlexandre Bounine rio_mport_read_config_32(port, destid, hopcount, 546e5cabeb3SAlexandre Bounine ext_ftr_ptr, &result); 547e5cabeb3SAlexandre Bounine result = RIO_GET_BLOCK_ID(result); 548e5cabeb3SAlexandre Bounine if ((result == RIO_EFB_SER_EP_FREE_ID) || 549e5cabeb3SAlexandre Bounine (result == RIO_EFB_SER_EP_FREE_ID_V13P) || 550e5cabeb3SAlexandre Bounine (result == RIO_EFB_SER_EP_FREC_ID)) 551eb188d0eSMatt Porter break; 552e5cabeb3SAlexandre Bounine 553e5cabeb3SAlexandre Bounine ext_ftr_ptr = rio_mport_get_efb(port, 0, destid, hopcount, 554e5cabeb3SAlexandre Bounine ext_ftr_ptr); 555e5cabeb3SAlexandre Bounine } 556eb188d0eSMatt Porter 557eb188d0eSMatt Porter if (ext_ftr_ptr) 558eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, 559eb188d0eSMatt Porter ext_ftr_ptr + 560eb188d0eSMatt Porter RIO_PORT_N_ERR_STS_CSR(sport), 561eb188d0eSMatt Porter &result); 562eb188d0eSMatt Porter 563e5cabeb3SAlexandre Bounine return result & RIO_PORT_N_ERR_STS_PORT_OK; 564eb188d0eSMatt Porter } 565eb188d0eSMatt Porter 566eb188d0eSMatt Porter /** 567818a04a0SAlexandre Bounine * rio_lock_device - Acquires host device lock for specified device 568818a04a0SAlexandre Bounine * @port: Master port to send transaction 569818a04a0SAlexandre Bounine * @destid: Destination ID for device/switch 570818a04a0SAlexandre Bounine * @hopcount: Hopcount to reach switch 571818a04a0SAlexandre Bounine * @wait_ms: Max wait time in msec (0 = no timeout) 572818a04a0SAlexandre Bounine * 573818a04a0SAlexandre Bounine * Attepts to acquire host device lock for specified device 574818a04a0SAlexandre Bounine * Returns 0 if device lock acquired or EINVAL if timeout expires. 575818a04a0SAlexandre Bounine */ 576818a04a0SAlexandre Bounine static int 577818a04a0SAlexandre Bounine rio_lock_device(struct rio_mport *port, u16 destid, u8 hopcount, int wait_ms) 578818a04a0SAlexandre Bounine { 579818a04a0SAlexandre Bounine u32 result; 580818a04a0SAlexandre Bounine int tcnt = 0; 581818a04a0SAlexandre Bounine 582818a04a0SAlexandre Bounine /* Attempt to acquire device lock */ 583818a04a0SAlexandre Bounine rio_mport_write_config_32(port, destid, hopcount, 584818a04a0SAlexandre Bounine RIO_HOST_DID_LOCK_CSR, port->host_deviceid); 585818a04a0SAlexandre Bounine rio_mport_read_config_32(port, destid, hopcount, 586818a04a0SAlexandre Bounine RIO_HOST_DID_LOCK_CSR, &result); 587818a04a0SAlexandre Bounine 588818a04a0SAlexandre Bounine while (result != port->host_deviceid) { 589818a04a0SAlexandre Bounine if (wait_ms != 0 && tcnt == wait_ms) { 590818a04a0SAlexandre Bounine pr_debug("RIO: timeout when locking device %x:%x\n", 591818a04a0SAlexandre Bounine destid, hopcount); 592818a04a0SAlexandre Bounine return -EINVAL; 593818a04a0SAlexandre Bounine } 594818a04a0SAlexandre Bounine 595818a04a0SAlexandre Bounine /* Delay a bit */ 596818a04a0SAlexandre Bounine mdelay(1); 597818a04a0SAlexandre Bounine tcnt++; 598818a04a0SAlexandre Bounine /* Try to acquire device lock again */ 599818a04a0SAlexandre Bounine rio_mport_write_config_32(port, destid, 600818a04a0SAlexandre Bounine hopcount, 601818a04a0SAlexandre Bounine RIO_HOST_DID_LOCK_CSR, 602818a04a0SAlexandre Bounine port->host_deviceid); 603818a04a0SAlexandre Bounine rio_mport_read_config_32(port, destid, 604818a04a0SAlexandre Bounine hopcount, 605818a04a0SAlexandre Bounine RIO_HOST_DID_LOCK_CSR, &result); 606818a04a0SAlexandre Bounine } 607818a04a0SAlexandre Bounine 608818a04a0SAlexandre Bounine return 0; 609818a04a0SAlexandre Bounine } 610818a04a0SAlexandre Bounine 611818a04a0SAlexandre Bounine /** 612818a04a0SAlexandre Bounine * rio_unlock_device - Releases host device lock for specified device 613818a04a0SAlexandre Bounine * @port: Master port to send transaction 614818a04a0SAlexandre Bounine * @destid: Destination ID for device/switch 615818a04a0SAlexandre Bounine * @hopcount: Hopcount to reach switch 616818a04a0SAlexandre Bounine * 617818a04a0SAlexandre Bounine * Returns 0 if device lock released or EINVAL if fails. 618818a04a0SAlexandre Bounine */ 619818a04a0SAlexandre Bounine static int 620818a04a0SAlexandre Bounine rio_unlock_device(struct rio_mport *port, u16 destid, u8 hopcount) 621818a04a0SAlexandre Bounine { 622818a04a0SAlexandre Bounine u32 result; 623818a04a0SAlexandre Bounine 624818a04a0SAlexandre Bounine /* Release device lock */ 625818a04a0SAlexandre Bounine rio_mport_write_config_32(port, destid, 626818a04a0SAlexandre Bounine hopcount, 627818a04a0SAlexandre Bounine RIO_HOST_DID_LOCK_CSR, 628818a04a0SAlexandre Bounine port->host_deviceid); 629818a04a0SAlexandre Bounine rio_mport_read_config_32(port, destid, hopcount, 630818a04a0SAlexandre Bounine RIO_HOST_DID_LOCK_CSR, &result); 631818a04a0SAlexandre Bounine if ((result & 0xffff) != 0xffff) { 632818a04a0SAlexandre Bounine pr_debug("RIO: badness when releasing device lock %x:%x\n", 633818a04a0SAlexandre Bounine destid, hopcount); 634818a04a0SAlexandre Bounine return -EINVAL; 635818a04a0SAlexandre Bounine } 636818a04a0SAlexandre Bounine 637818a04a0SAlexandre Bounine return 0; 638818a04a0SAlexandre Bounine } 639818a04a0SAlexandre Bounine 640818a04a0SAlexandre Bounine /** 641eb188d0eSMatt Porter * rio_route_add_entry- Add a route entry to a switch routing table 642a93192a5SAlexandre Bounine * @rdev: RIO device 643eb188d0eSMatt Porter * @table: Routing table ID 644eb188d0eSMatt Porter * @route_destid: Destination ID to be routed 645eb188d0eSMatt Porter * @route_port: Port number to be routed 646818a04a0SAlexandre Bounine * @lock: lock switch device flag 647eb188d0eSMatt Porter * 648eb188d0eSMatt Porter * Calls the switch specific add_entry() method to add a route entry 649eb188d0eSMatt Porter * on a switch. The route table can be specified using the @table 650eb188d0eSMatt Porter * argument if a switch has per port routing tables or the normal 651eb188d0eSMatt Porter * use is to specific all tables (or the global table) by passing 652eb188d0eSMatt Porter * %RIO_GLOBAL_TABLE in @table. Returns %0 on success or %-EINVAL 653eb188d0eSMatt Porter * on failure. 654eb188d0eSMatt Porter */ 655818a04a0SAlexandre Bounine static int 656a93192a5SAlexandre Bounine rio_route_add_entry(struct rio_dev *rdev, 657818a04a0SAlexandre Bounine u16 table, u16 route_destid, u8 route_port, int lock) 658eb188d0eSMatt Porter { 659818a04a0SAlexandre Bounine int rc; 660818a04a0SAlexandre Bounine 661818a04a0SAlexandre Bounine if (lock) { 662a93192a5SAlexandre Bounine rc = rio_lock_device(rdev->net->hport, rdev->destid, 663a93192a5SAlexandre Bounine rdev->hopcount, 1000); 664818a04a0SAlexandre Bounine if (rc) 665818a04a0SAlexandre Bounine return rc; 666818a04a0SAlexandre Bounine } 667818a04a0SAlexandre Bounine 668a93192a5SAlexandre Bounine rc = rdev->rswitch->add_entry(rdev->net->hport, rdev->destid, 669a93192a5SAlexandre Bounine rdev->hopcount, table, 670eb188d0eSMatt Porter route_destid, route_port); 671818a04a0SAlexandre Bounine if (lock) 672a93192a5SAlexandre Bounine rio_unlock_device(rdev->net->hport, rdev->destid, 673a93192a5SAlexandre Bounine rdev->hopcount); 674818a04a0SAlexandre Bounine 675818a04a0SAlexandre Bounine return rc; 676eb188d0eSMatt Porter } 677eb188d0eSMatt Porter 678eb188d0eSMatt Porter /** 679eb188d0eSMatt Porter * rio_route_get_entry- Read a route entry in a switch routing table 680a93192a5SAlexandre Bounine * @rdev: RIO device 681eb188d0eSMatt Porter * @table: Routing table ID 682eb188d0eSMatt Porter * @route_destid: Destination ID to be routed 683eb188d0eSMatt Porter * @route_port: Pointer to read port number into 684818a04a0SAlexandre Bounine * @lock: lock switch device flag 685eb188d0eSMatt Porter * 686eb188d0eSMatt Porter * Calls the switch specific get_entry() method to read a route entry 687eb188d0eSMatt Porter * in a switch. The route table can be specified using the @table 688eb188d0eSMatt Porter * argument if a switch has per port routing tables or the normal 689eb188d0eSMatt Porter * use is to specific all tables (or the global table) by passing 690eb188d0eSMatt Porter * %RIO_GLOBAL_TABLE in @table. Returns %0 on success or %-EINVAL 691eb188d0eSMatt Porter * on failure. 692eb188d0eSMatt Porter */ 693eb188d0eSMatt Porter static int 694a93192a5SAlexandre Bounine rio_route_get_entry(struct rio_dev *rdev, u16 table, 695818a04a0SAlexandre Bounine u16 route_destid, u8 *route_port, int lock) 696eb188d0eSMatt Porter { 697818a04a0SAlexandre Bounine int rc; 698818a04a0SAlexandre Bounine 699818a04a0SAlexandre Bounine if (lock) { 700a93192a5SAlexandre Bounine rc = rio_lock_device(rdev->net->hport, rdev->destid, 701a93192a5SAlexandre Bounine rdev->hopcount, 1000); 702818a04a0SAlexandre Bounine if (rc) 703818a04a0SAlexandre Bounine return rc; 704818a04a0SAlexandre Bounine } 705818a04a0SAlexandre Bounine 706a93192a5SAlexandre Bounine rc = rdev->rswitch->get_entry(rdev->net->hport, rdev->destid, 707a93192a5SAlexandre Bounine rdev->hopcount, table, 708eb188d0eSMatt Porter route_destid, route_port); 709818a04a0SAlexandre Bounine if (lock) 710a93192a5SAlexandre Bounine rio_unlock_device(rdev->net->hport, rdev->destid, 711a93192a5SAlexandre Bounine rdev->hopcount); 712818a04a0SAlexandre Bounine 713818a04a0SAlexandre Bounine return rc; 714eb188d0eSMatt Porter } 715eb188d0eSMatt Porter 716eb188d0eSMatt Porter /** 717eb188d0eSMatt Porter * rio_get_host_deviceid_lock- Reads the Host Device ID Lock CSR on a device 718eb188d0eSMatt Porter * @port: Master port to send transaction 719eb188d0eSMatt Porter * @hopcount: Number of hops to the device 720eb188d0eSMatt Porter * 721eb188d0eSMatt Porter * Used during enumeration to read the Host Device ID Lock CSR on a 722eb188d0eSMatt Porter * RIO device. Returns the value of the lock register. 723eb188d0eSMatt Porter */ 724eb188d0eSMatt Porter static u16 rio_get_host_deviceid_lock(struct rio_mport *port, u8 hopcount) 725eb188d0eSMatt Porter { 726eb188d0eSMatt Porter u32 result; 727eb188d0eSMatt Porter 728e0423236SZhang Wei rio_mport_read_config_32(port, RIO_ANY_DESTID(port->sys_size), hopcount, 729eb188d0eSMatt Porter RIO_HOST_DID_LOCK_CSR, &result); 730eb188d0eSMatt Porter 731eb188d0eSMatt Porter return (u16) (result & 0xffff); 732eb188d0eSMatt Porter } 733eb188d0eSMatt Porter 734eb188d0eSMatt Porter /** 735eb188d0eSMatt Porter * rio_enum_peer- Recursively enumerate a RIO network through a master port 736eb188d0eSMatt Porter * @net: RIO network being enumerated 737eb188d0eSMatt Porter * @port: Master port to send transactions 738eb188d0eSMatt Porter * @hopcount: Number of hops into the network 73968fe4df5SAlexandre Bounine * @prev: Previous RIO device connected to the enumerated one 74068fe4df5SAlexandre Bounine * @prev_port: Port on previous RIO device 741eb188d0eSMatt Porter * 742eb188d0eSMatt Porter * Recursively enumerates a RIO network. Transactions are sent via the 743eb188d0eSMatt Porter * master port passed in @port. 744eb188d0eSMatt Porter */ 745181a6ff0SLi Yang static int __devinit rio_enum_peer(struct rio_net *net, struct rio_mport *port, 74668fe4df5SAlexandre Bounine u8 hopcount, struct rio_dev *prev, int prev_port) 747eb188d0eSMatt Porter { 748eb188d0eSMatt Porter int port_num; 749eb188d0eSMatt Porter int cur_destid; 750c70555b0SAlexandre Bounine int sw_destid; 751c70555b0SAlexandre Bounine int sw_inport; 752eb188d0eSMatt Porter struct rio_dev *rdev; 753eb188d0eSMatt Porter u16 destid; 754af84ca38SAlexandre Bounine u32 regval; 755eb188d0eSMatt Porter int tmp; 756eb188d0eSMatt Porter 757e274e0edSAlexandre Bounine if (rio_mport_chk_dev_access(port, 758e274e0edSAlexandre Bounine RIO_ANY_DESTID(port->sys_size), hopcount)) { 759e274e0edSAlexandre Bounine pr_debug("RIO: device access check failed\n"); 760e274e0edSAlexandre Bounine return -1; 761e274e0edSAlexandre Bounine } 762e274e0edSAlexandre Bounine 763eb188d0eSMatt Porter if (rio_get_host_deviceid_lock(port, hopcount) == port->host_deviceid) { 764eb188d0eSMatt Porter pr_debug("RIO: PE already discovered by this host\n"); 765eb188d0eSMatt Porter /* 766eb188d0eSMatt Porter * Already discovered by this host. Add it as another 767af84ca38SAlexandre Bounine * link to the existing device. 768eb188d0eSMatt Porter */ 769af84ca38SAlexandre Bounine rio_mport_read_config_32(port, RIO_ANY_DESTID(port->sys_size), 770af84ca38SAlexandre Bounine hopcount, RIO_COMPONENT_TAG_CSR, ®val); 771af84ca38SAlexandre Bounine 772af84ca38SAlexandre Bounine if (regval) { 773af84ca38SAlexandre Bounine rdev = rio_get_comptag((regval & 0xffff), NULL); 774af84ca38SAlexandre Bounine 775af84ca38SAlexandre Bounine if (rdev && prev && rio_is_switch(prev)) { 776af84ca38SAlexandre Bounine pr_debug("RIO: redundant path to %s\n", 777af84ca38SAlexandre Bounine rio_name(rdev)); 778af84ca38SAlexandre Bounine prev->rswitch->nextdev[prev_port] = rdev; 779af84ca38SAlexandre Bounine } 780af84ca38SAlexandre Bounine } 781af84ca38SAlexandre Bounine 782eb188d0eSMatt Porter return 0; 783eb188d0eSMatt Porter } 784eb188d0eSMatt Porter 785eb188d0eSMatt Porter /* Attempt to acquire device lock */ 786e0423236SZhang Wei rio_mport_write_config_32(port, RIO_ANY_DESTID(port->sys_size), 787e0423236SZhang Wei hopcount, 788eb188d0eSMatt Porter RIO_HOST_DID_LOCK_CSR, port->host_deviceid); 789eb188d0eSMatt Porter while ((tmp = rio_get_host_deviceid_lock(port, hopcount)) 790eb188d0eSMatt Porter < port->host_deviceid) { 791eb188d0eSMatt Porter /* Delay a bit */ 792eb188d0eSMatt Porter mdelay(1); 793eb188d0eSMatt Porter /* Attempt to acquire device lock again */ 794e0423236SZhang Wei rio_mport_write_config_32(port, RIO_ANY_DESTID(port->sys_size), 795e0423236SZhang Wei hopcount, 796eb188d0eSMatt Porter RIO_HOST_DID_LOCK_CSR, 797eb188d0eSMatt Porter port->host_deviceid); 798eb188d0eSMatt Porter } 799eb188d0eSMatt Porter 800eb188d0eSMatt Porter if (rio_get_host_deviceid_lock(port, hopcount) > port->host_deviceid) { 801eb188d0eSMatt Porter pr_debug( 802eb188d0eSMatt Porter "RIO: PE locked by a higher priority host...retreating\n"); 803eb188d0eSMatt Porter return -1; 804eb188d0eSMatt Porter } 805eb188d0eSMatt Porter 806eb188d0eSMatt Porter /* Setup new RIO device */ 807e0423236SZhang Wei rdev = rio_setup_device(net, port, RIO_ANY_DESTID(port->sys_size), 808e0423236SZhang Wei hopcount, 1); 809e0423236SZhang Wei if (rdev) { 810eb188d0eSMatt Porter /* Add device to the global and bus/net specific list. */ 811eb188d0eSMatt Porter list_add_tail(&rdev->net_list, &net->devices); 81268fe4df5SAlexandre Bounine rdev->prev = prev; 81368fe4df5SAlexandre Bounine if (prev && rio_is_switch(prev)) 81468fe4df5SAlexandre Bounine prev->rswitch->nextdev[prev_port] = rdev; 815eb188d0eSMatt Porter } else 816eb188d0eSMatt Porter return -1; 817eb188d0eSMatt Porter 818eb188d0eSMatt Porter if (rio_is_switch(rdev)) { 819eb188d0eSMatt Porter next_switchid++; 820ae05cbd5SAlexandre Bounine sw_inport = RIO_GET_PORT_NUM(rdev->swpinfo); 821a93192a5SAlexandre Bounine rio_route_add_entry(rdev, RIO_GLOBAL_TABLE, 822818a04a0SAlexandre Bounine port->host_deviceid, sw_inport, 0); 823c70555b0SAlexandre Bounine rdev->rswitch->route_table[port->host_deviceid] = sw_inport; 824eb188d0eSMatt Porter 825eb188d0eSMatt Porter for (destid = 0; destid < next_destid; destid++) { 826c70555b0SAlexandre Bounine if (destid == port->host_deviceid) 827c70555b0SAlexandre Bounine continue; 828a93192a5SAlexandre Bounine rio_route_add_entry(rdev, RIO_GLOBAL_TABLE, 829818a04a0SAlexandre Bounine destid, sw_inport, 0); 830c70555b0SAlexandre Bounine rdev->rswitch->route_table[destid] = sw_inport; 831eb188d0eSMatt Porter } 832eb188d0eSMatt Porter 833eb188d0eSMatt Porter pr_debug( 834eb188d0eSMatt Porter "RIO: found %s (vid %4.4x did %4.4x) with %d ports\n", 83568fe4df5SAlexandre Bounine rio_name(rdev), rdev->vid, rdev->did, 83668fe4df5SAlexandre Bounine RIO_GET_TOTAL_PORTS(rdev->swpinfo)); 837c70555b0SAlexandre Bounine sw_destid = next_destid; 83868fe4df5SAlexandre Bounine for (port_num = 0; 83968fe4df5SAlexandre Bounine port_num < RIO_GET_TOTAL_PORTS(rdev->swpinfo); 84068fe4df5SAlexandre Bounine port_num++) { 841933af4a6SThomas Moll /*Enable Input Output Port (transmitter reviever)*/ 842933af4a6SThomas Moll rio_enable_rx_tx_port(port, 0, 843933af4a6SThomas Moll RIO_ANY_DESTID(port->sys_size), 844933af4a6SThomas Moll hopcount, port_num); 845933af4a6SThomas Moll 846e5cabeb3SAlexandre Bounine if (sw_inport == port_num) { 847e5cabeb3SAlexandre Bounine rdev->rswitch->port_ok |= (1 << port_num); 848eb188d0eSMatt Porter continue; 849e5cabeb3SAlexandre Bounine } 850eb188d0eSMatt Porter 851eb188d0eSMatt Porter cur_destid = next_destid; 852eb188d0eSMatt Porter 853eb188d0eSMatt Porter if (rio_sport_is_active 854e0423236SZhang Wei (port, RIO_ANY_DESTID(port->sys_size), hopcount, 855e0423236SZhang Wei port_num)) { 856eb188d0eSMatt Porter pr_debug( 857eb188d0eSMatt Porter "RIO: scanning device on port %d\n", 858eb188d0eSMatt Porter port_num); 859e5cabeb3SAlexandre Bounine rdev->rswitch->port_ok |= (1 << port_num); 860a93192a5SAlexandre Bounine rio_route_add_entry(rdev, RIO_GLOBAL_TABLE, 861e0423236SZhang Wei RIO_ANY_DESTID(port->sys_size), 862818a04a0SAlexandre Bounine port_num, 0); 863eb188d0eSMatt Porter 86468fe4df5SAlexandre Bounine if (rio_enum_peer(net, port, hopcount + 1, 86568fe4df5SAlexandre Bounine rdev, port_num) < 0) 866eb188d0eSMatt Porter return -1; 867eb188d0eSMatt Porter 868eb188d0eSMatt Porter /* Update routing tables */ 869eb188d0eSMatt Porter if (next_destid > cur_destid) { 870eb188d0eSMatt Porter for (destid = cur_destid; 871eb188d0eSMatt Porter destid < next_destid; destid++) { 872c70555b0SAlexandre Bounine if (destid == port->host_deviceid) 873c70555b0SAlexandre Bounine continue; 874a93192a5SAlexandre Bounine rio_route_add_entry(rdev, 875eb188d0eSMatt Porter RIO_GLOBAL_TABLE, 876eb188d0eSMatt Porter destid, 877818a04a0SAlexandre Bounine port_num, 878818a04a0SAlexandre Bounine 0); 879eb188d0eSMatt Porter rdev->rswitch-> 880eb188d0eSMatt Porter route_table[destid] = 881eb188d0eSMatt Porter port_num; 882eb188d0eSMatt Porter } 883eb188d0eSMatt Porter } 884e5cabeb3SAlexandre Bounine } else { 885e5cabeb3SAlexandre Bounine /* If switch supports Error Management, 886e5cabeb3SAlexandre Bounine * set PORT_LOCKOUT bit for unused port 887e5cabeb3SAlexandre Bounine */ 888e5cabeb3SAlexandre Bounine if (rdev->em_efptr) 889e5cabeb3SAlexandre Bounine rio_set_port_lockout(rdev, port_num, 1); 890e5cabeb3SAlexandre Bounine 891e5cabeb3SAlexandre Bounine rdev->rswitch->port_ok &= ~(1 << port_num); 892eb188d0eSMatt Porter } 893eb188d0eSMatt Porter } 894c70555b0SAlexandre Bounine 895e5cabeb3SAlexandre Bounine /* Direct Port-write messages to the enumeratiing host */ 896e5cabeb3SAlexandre Bounine if ((rdev->src_ops & RIO_SRC_OPS_PORT_WRITE) && 897e5cabeb3SAlexandre Bounine (rdev->em_efptr)) { 898e5cabeb3SAlexandre Bounine rio_write_config_32(rdev, 899e5cabeb3SAlexandre Bounine rdev->em_efptr + RIO_EM_PW_TGT_DEVID, 900e5cabeb3SAlexandre Bounine (port->host_deviceid << 16) | 901e5cabeb3SAlexandre Bounine (port->sys_size << 15)); 902e5cabeb3SAlexandre Bounine } 903e5cabeb3SAlexandre Bounine 904e5cabeb3SAlexandre Bounine rio_init_em(rdev); 905e5cabeb3SAlexandre Bounine 906c70555b0SAlexandre Bounine /* Check for empty switch */ 907c70555b0SAlexandre Bounine if (next_destid == sw_destid) { 908c70555b0SAlexandre Bounine next_destid++; 909c70555b0SAlexandre Bounine if (next_destid == port->host_deviceid) 910c70555b0SAlexandre Bounine next_destid++; 911c70555b0SAlexandre Bounine } 912c70555b0SAlexandre Bounine 913a93192a5SAlexandre Bounine rdev->destid = sw_destid; 914eb188d0eSMatt Porter } else 915eb188d0eSMatt Porter pr_debug("RIO: found %s (vid %4.4x did %4.4x)\n", 916eb188d0eSMatt Porter rio_name(rdev), rdev->vid, rdev->did); 917eb188d0eSMatt Porter 918eb188d0eSMatt Porter return 0; 919eb188d0eSMatt Porter } 920eb188d0eSMatt Porter 921eb188d0eSMatt Porter /** 922eb188d0eSMatt Porter * rio_enum_complete- Tests if enumeration of a network is complete 923eb188d0eSMatt Porter * @port: Master port to send transaction 924eb188d0eSMatt Porter * 925e5cabeb3SAlexandre Bounine * Tests the Component Tag CSR for non-zero value (enumeration 926e5cabeb3SAlexandre Bounine * complete flag). Return %1 if enumeration is complete or %0 if 927eb188d0eSMatt Porter * enumeration is incomplete. 928eb188d0eSMatt Porter */ 929eb188d0eSMatt Porter static int rio_enum_complete(struct rio_mport *port) 930eb188d0eSMatt Porter { 931af84ca38SAlexandre Bounine u32 regval; 932eb188d0eSMatt Porter 933af84ca38SAlexandre Bounine rio_local_read_config_32(port, port->phys_efptr + RIO_PORT_GEN_CTL_CSR, 934af84ca38SAlexandre Bounine ®val); 935af84ca38SAlexandre Bounine return (regval & RIO_PORT_GEN_MASTER) ? 1 : 0; 936eb188d0eSMatt Porter } 937eb188d0eSMatt Porter 938eb188d0eSMatt Porter /** 939eb188d0eSMatt Porter * rio_disc_peer- Recursively discovers a RIO network through a master port 940eb188d0eSMatt Porter * @net: RIO network being discovered 941eb188d0eSMatt Porter * @port: Master port to send transactions 942eb188d0eSMatt Porter * @destid: Current destination ID in network 943eb188d0eSMatt Porter * @hopcount: Number of hops into the network 944eb188d0eSMatt Porter * 945eb188d0eSMatt Porter * Recursively discovers a RIO network. Transactions are sent via the 946eb188d0eSMatt Porter * master port passed in @port. 947eb188d0eSMatt Porter */ 948181a6ff0SLi Yang static int __devinit 949eb188d0eSMatt Porter rio_disc_peer(struct rio_net *net, struct rio_mport *port, u16 destid, 950eb188d0eSMatt Porter u8 hopcount) 951eb188d0eSMatt Porter { 952eb188d0eSMatt Porter u8 port_num, route_port; 953eb188d0eSMatt Porter struct rio_dev *rdev; 954eb188d0eSMatt Porter u16 ndestid; 955eb188d0eSMatt Porter 956eb188d0eSMatt Porter /* Setup new RIO device */ 957eb188d0eSMatt Porter if ((rdev = rio_setup_device(net, port, destid, hopcount, 0))) { 958eb188d0eSMatt Porter /* Add device to the global and bus/net specific list. */ 959eb188d0eSMatt Porter list_add_tail(&rdev->net_list, &net->devices); 960eb188d0eSMatt Porter } else 961eb188d0eSMatt Porter return -1; 962eb188d0eSMatt Porter 963eb188d0eSMatt Porter if (rio_is_switch(rdev)) { 964eb188d0eSMatt Porter next_switchid++; 965eb188d0eSMatt Porter 966eb188d0eSMatt Porter /* Associated destid is how we accessed this switch */ 967a93192a5SAlexandre Bounine rdev->destid = destid; 968eb188d0eSMatt Porter 969eb188d0eSMatt Porter pr_debug( 970eb188d0eSMatt Porter "RIO: found %s (vid %4.4x did %4.4x) with %d ports\n", 97168fe4df5SAlexandre Bounine rio_name(rdev), rdev->vid, rdev->did, 97268fe4df5SAlexandre Bounine RIO_GET_TOTAL_PORTS(rdev->swpinfo)); 97368fe4df5SAlexandre Bounine for (port_num = 0; 97468fe4df5SAlexandre Bounine port_num < RIO_GET_TOTAL_PORTS(rdev->swpinfo); 97568fe4df5SAlexandre Bounine port_num++) { 976ae05cbd5SAlexandre Bounine if (RIO_GET_PORT_NUM(rdev->swpinfo) == port_num) 977eb188d0eSMatt Porter continue; 978eb188d0eSMatt Porter 979eb188d0eSMatt Porter if (rio_sport_is_active 980eb188d0eSMatt Porter (port, destid, hopcount, port_num)) { 981eb188d0eSMatt Porter pr_debug( 982eb188d0eSMatt Porter "RIO: scanning device on port %d\n", 983eb188d0eSMatt Porter port_num); 984818a04a0SAlexandre Bounine 985818a04a0SAlexandre Bounine rio_lock_device(port, destid, hopcount, 1000); 986818a04a0SAlexandre Bounine 987e0423236SZhang Wei for (ndestid = 0; 988e0423236SZhang Wei ndestid < RIO_ANY_DESTID(port->sys_size); 989eb188d0eSMatt Porter ndestid++) { 990a93192a5SAlexandre Bounine rio_route_get_entry(rdev, 991eb188d0eSMatt Porter RIO_GLOBAL_TABLE, 992eb188d0eSMatt Porter ndestid, 993818a04a0SAlexandre Bounine &route_port, 0); 994eb188d0eSMatt Porter if (route_port == port_num) 995eb188d0eSMatt Porter break; 996eb188d0eSMatt Porter } 997eb188d0eSMatt Porter 998af84ca38SAlexandre Bounine if (ndestid == RIO_ANY_DESTID(port->sys_size)) 999af84ca38SAlexandre Bounine continue; 1000818a04a0SAlexandre Bounine rio_unlock_device(port, destid, hopcount); 1001eb188d0eSMatt Porter if (rio_disc_peer 1002eb188d0eSMatt Porter (net, port, ndestid, hopcount + 1) < 0) 1003eb188d0eSMatt Porter return -1; 1004eb188d0eSMatt Porter } 1005eb188d0eSMatt Porter } 1006eb188d0eSMatt Porter } else 1007eb188d0eSMatt Porter pr_debug("RIO: found %s (vid %4.4x did %4.4x)\n", 1008eb188d0eSMatt Porter rio_name(rdev), rdev->vid, rdev->did); 1009eb188d0eSMatt Porter 1010eb188d0eSMatt Porter return 0; 1011eb188d0eSMatt Porter } 1012eb188d0eSMatt Porter 1013eb188d0eSMatt Porter /** 1014eb188d0eSMatt Porter * rio_mport_is_active- Tests if master port link is active 1015eb188d0eSMatt Porter * @port: Master port to test 1016eb188d0eSMatt Porter * 1017eb188d0eSMatt Porter * Reads the port error status CSR for the master port to 1018eb188d0eSMatt Porter * determine if the port has an active link. Returns 1019e5cabeb3SAlexandre Bounine * %RIO_PORT_N_ERR_STS_PORT_OK if the master port is active 1020eb188d0eSMatt Porter * or %0 if it is inactive. 1021eb188d0eSMatt Porter */ 1022eb188d0eSMatt Porter static int rio_mport_is_active(struct rio_mport *port) 1023eb188d0eSMatt Porter { 1024eb188d0eSMatt Porter u32 result = 0; 1025eb188d0eSMatt Porter u32 ext_ftr_ptr; 1026eb188d0eSMatt Porter int *entry = rio_mport_phys_table; 1027eb188d0eSMatt Porter 1028eb188d0eSMatt Porter do { 1029eb188d0eSMatt Porter if ((ext_ftr_ptr = 1030eb188d0eSMatt Porter rio_mport_get_feature(port, 1, 0, 0, *entry))) 1031eb188d0eSMatt Porter break; 1032eb188d0eSMatt Porter } while (*++entry >= 0); 1033eb188d0eSMatt Porter 1034eb188d0eSMatt Porter if (ext_ftr_ptr) 1035eb188d0eSMatt Porter rio_local_read_config_32(port, 1036eb188d0eSMatt Porter ext_ftr_ptr + 1037eb188d0eSMatt Porter RIO_PORT_N_ERR_STS_CSR(port->index), 1038eb188d0eSMatt Porter &result); 1039eb188d0eSMatt Porter 1040e5cabeb3SAlexandre Bounine return result & RIO_PORT_N_ERR_STS_PORT_OK; 1041eb188d0eSMatt Porter } 1042eb188d0eSMatt Porter 1043eb188d0eSMatt Porter /** 1044eb188d0eSMatt Porter * rio_alloc_net- Allocate and configure a new RIO network 1045eb188d0eSMatt Porter * @port: Master port associated with the RIO network 1046eb188d0eSMatt Porter * 1047eb188d0eSMatt Porter * Allocates a RIO network structure, initializes per-network 1048eb188d0eSMatt Porter * list heads, and adds the associated master port to the 1049eb188d0eSMatt Porter * network list of associated master ports. Returns a 1050eb188d0eSMatt Porter * RIO network pointer on success or %NULL on failure. 1051eb188d0eSMatt Porter */ 1052eb188d0eSMatt Porter static struct rio_net __devinit *rio_alloc_net(struct rio_mport *port) 1053eb188d0eSMatt Porter { 1054eb188d0eSMatt Porter struct rio_net *net; 1055eb188d0eSMatt Porter 1056dd00cc48SYoann Padioleau net = kzalloc(sizeof(struct rio_net), GFP_KERNEL); 1057eb188d0eSMatt Porter if (net) { 1058eb188d0eSMatt Porter INIT_LIST_HEAD(&net->node); 1059eb188d0eSMatt Porter INIT_LIST_HEAD(&net->devices); 1060eb188d0eSMatt Porter INIT_LIST_HEAD(&net->mports); 1061eb188d0eSMatt Porter list_add_tail(&port->nnode, &net->mports); 1062eb188d0eSMatt Porter net->hport = port; 1063eb188d0eSMatt Porter net->id = next_net++; 1064eb188d0eSMatt Porter } 1065eb188d0eSMatt Porter return net; 1066eb188d0eSMatt Porter } 1067eb188d0eSMatt Porter 1068eb188d0eSMatt Porter /** 1069c70555b0SAlexandre Bounine * rio_update_route_tables- Updates route tables in switches 1070c70555b0SAlexandre Bounine * @port: Master port associated with the RIO network 1071c70555b0SAlexandre Bounine * 1072c70555b0SAlexandre Bounine * For each enumerated device, ensure that each switch in a system 1073c70555b0SAlexandre Bounine * has correct routing entries. Add routes for devices that where 1074c70555b0SAlexandre Bounine * unknown dirung the first enumeration pass through the switch. 1075c70555b0SAlexandre Bounine */ 1076c70555b0SAlexandre Bounine static void rio_update_route_tables(struct rio_mport *port) 1077c70555b0SAlexandre Bounine { 1078ded05782SAlexandre Bounine struct rio_dev *rdev, *swrdev; 1079c70555b0SAlexandre Bounine struct rio_switch *rswitch; 1080c70555b0SAlexandre Bounine u8 sport; 1081c70555b0SAlexandre Bounine u16 destid; 1082c70555b0SAlexandre Bounine 1083c70555b0SAlexandre Bounine list_for_each_entry(rdev, &rio_devices, global_list) { 1084c70555b0SAlexandre Bounine 1085a93192a5SAlexandre Bounine destid = rdev->destid; 1086c70555b0SAlexandre Bounine 1087c70555b0SAlexandre Bounine list_for_each_entry(rswitch, &rio_switches, node) { 1088c70555b0SAlexandre Bounine 1089c70555b0SAlexandre Bounine if (rio_is_switch(rdev) && (rdev->rswitch == rswitch)) 1090c70555b0SAlexandre Bounine continue; 1091c70555b0SAlexandre Bounine 1092c70555b0SAlexandre Bounine if (RIO_INVALID_ROUTE == rswitch->route_table[destid]) { 1093ded05782SAlexandre Bounine swrdev = sw_to_rio_dev(rswitch); 1094ded05782SAlexandre Bounine 109507590ff0SAlexandre Bounine /* Skip if destid ends in empty switch*/ 1096ded05782SAlexandre Bounine if (swrdev->destid == destid) 109707590ff0SAlexandre Bounine continue; 1098c70555b0SAlexandre Bounine 1099ded05782SAlexandre Bounine sport = RIO_GET_PORT_NUM(swrdev->swpinfo); 1100c70555b0SAlexandre Bounine 1101c70555b0SAlexandre Bounine if (rswitch->add_entry) { 1102ded05782SAlexandre Bounine rio_route_add_entry(swrdev, 1103818a04a0SAlexandre Bounine RIO_GLOBAL_TABLE, destid, 1104818a04a0SAlexandre Bounine sport, 0); 1105c70555b0SAlexandre Bounine rswitch->route_table[destid] = sport; 1106c70555b0SAlexandre Bounine } 1107c70555b0SAlexandre Bounine } 1108c70555b0SAlexandre Bounine } 1109c70555b0SAlexandre Bounine } 1110c70555b0SAlexandre Bounine } 1111c70555b0SAlexandre Bounine 1112c70555b0SAlexandre Bounine /** 1113e5cabeb3SAlexandre Bounine * rio_init_em - Initializes RIO Error Management (for switches) 111497ef6f74SRandy Dunlap * @rdev: RIO device 1115e5cabeb3SAlexandre Bounine * 1116e5cabeb3SAlexandre Bounine * For each enumerated switch, call device-specific error management 1117e5cabeb3SAlexandre Bounine * initialization routine (if supplied by the switch driver). 1118e5cabeb3SAlexandre Bounine */ 1119e5cabeb3SAlexandre Bounine static void rio_init_em(struct rio_dev *rdev) 1120e5cabeb3SAlexandre Bounine { 1121e5cabeb3SAlexandre Bounine if (rio_is_switch(rdev) && (rdev->em_efptr) && 1122e5cabeb3SAlexandre Bounine (rdev->rswitch->em_init)) { 1123e5cabeb3SAlexandre Bounine rdev->rswitch->em_init(rdev); 1124e5cabeb3SAlexandre Bounine } 1125e5cabeb3SAlexandre Bounine } 1126e5cabeb3SAlexandre Bounine 1127e5cabeb3SAlexandre Bounine /** 1128e5cabeb3SAlexandre Bounine * rio_pw_enable - Enables/disables port-write handling by a master port 1129e5cabeb3SAlexandre Bounine * @port: Master port associated with port-write handling 1130e5cabeb3SAlexandre Bounine * @enable: 1=enable, 0=disable 1131e5cabeb3SAlexandre Bounine */ 1132e5cabeb3SAlexandre Bounine static void rio_pw_enable(struct rio_mport *port, int enable) 1133e5cabeb3SAlexandre Bounine { 1134e5cabeb3SAlexandre Bounine if (port->ops->pwenable) 1135e5cabeb3SAlexandre Bounine port->ops->pwenable(port, enable); 1136e5cabeb3SAlexandre Bounine } 1137e5cabeb3SAlexandre Bounine 1138e5cabeb3SAlexandre Bounine /** 1139eb188d0eSMatt Porter * rio_enum_mport- Start enumeration through a master port 1140eb188d0eSMatt Porter * @mport: Master port to send transactions 1141eb188d0eSMatt Porter * 1142eb188d0eSMatt Porter * Starts the enumeration process. If somebody has enumerated our 1143eb188d0eSMatt Porter * master port device, then give up. If not and we have an active 1144eb188d0eSMatt Porter * link, then start recursive peer enumeration. Returns %0 if 1145eb188d0eSMatt Porter * enumeration succeeds or %-EBUSY if enumeration fails. 1146eb188d0eSMatt Porter */ 114737d33d15SAl Viro int __devinit rio_enum_mport(struct rio_mport *mport) 1148eb188d0eSMatt Porter { 1149eb188d0eSMatt Porter struct rio_net *net = NULL; 1150eb188d0eSMatt Porter int rc = 0; 1151eb188d0eSMatt Porter 1152eb188d0eSMatt Porter printk(KERN_INFO "RIO: enumerate master port %d, %s\n", mport->id, 1153eb188d0eSMatt Porter mport->name); 1154eb188d0eSMatt Porter /* If somebody else enumerated our master port device, bail. */ 1155eb188d0eSMatt Porter if (rio_enum_host(mport) < 0) { 1156eb188d0eSMatt Porter printk(KERN_INFO 1157eb188d0eSMatt Porter "RIO: master port %d device has been enumerated by a remote host\n", 1158eb188d0eSMatt Porter mport->id); 1159eb188d0eSMatt Porter rc = -EBUSY; 1160eb188d0eSMatt Porter goto out; 1161eb188d0eSMatt Porter } 1162eb188d0eSMatt Porter 1163eb188d0eSMatt Porter /* If master port has an active link, allocate net and enum peers */ 1164eb188d0eSMatt Porter if (rio_mport_is_active(mport)) { 1165eb188d0eSMatt Porter if (!(net = rio_alloc_net(mport))) { 1166eb188d0eSMatt Porter printk(KERN_ERR "RIO: failed to allocate new net\n"); 1167eb188d0eSMatt Porter rc = -ENOMEM; 1168eb188d0eSMatt Porter goto out; 1169eb188d0eSMatt Porter } 1170933af4a6SThomas Moll 1171933af4a6SThomas Moll /* Enable Input Output Port (transmitter reviever) */ 1172933af4a6SThomas Moll rio_enable_rx_tx_port(mport, 1, 0, 0, 0); 1173933af4a6SThomas Moll 1174af84ca38SAlexandre Bounine /* Set component tag for host */ 1175af84ca38SAlexandre Bounine rio_local_write_config_32(mport, RIO_COMPONENT_TAG_CSR, 1176af84ca38SAlexandre Bounine next_comptag++); 1177af84ca38SAlexandre Bounine 117868fe4df5SAlexandre Bounine if (rio_enum_peer(net, mport, 0, NULL, 0) < 0) { 1179eb188d0eSMatt Porter /* A higher priority host won enumeration, bail. */ 1180eb188d0eSMatt Porter printk(KERN_INFO 1181eb188d0eSMatt Porter "RIO: master port %d device has lost enumeration to a remote host\n", 1182eb188d0eSMatt Porter mport->id); 1183eb188d0eSMatt Porter rio_clear_locks(mport); 1184eb188d0eSMatt Porter rc = -EBUSY; 1185eb188d0eSMatt Porter goto out; 1186eb188d0eSMatt Porter } 1187c70555b0SAlexandre Bounine rio_update_route_tables(mport); 1188eb188d0eSMatt Porter rio_clear_locks(mport); 1189e5cabeb3SAlexandre Bounine rio_pw_enable(mport, 1); 1190eb188d0eSMatt Porter } else { 1191eb188d0eSMatt Porter printk(KERN_INFO "RIO: master port %d link inactive\n", 1192eb188d0eSMatt Porter mport->id); 1193eb188d0eSMatt Porter rc = -EINVAL; 1194eb188d0eSMatt Porter } 1195eb188d0eSMatt Porter 1196eb188d0eSMatt Porter out: 1197eb188d0eSMatt Porter return rc; 1198eb188d0eSMatt Porter } 1199eb188d0eSMatt Porter 1200eb188d0eSMatt Porter /** 1201eb188d0eSMatt Porter * rio_build_route_tables- Generate route tables from switch route entries 1202eb188d0eSMatt Porter * 1203eb188d0eSMatt Porter * For each switch device, generate a route table by copying existing 1204eb188d0eSMatt Porter * route entries from the switch. 1205eb188d0eSMatt Porter */ 1206eb188d0eSMatt Porter static void rio_build_route_tables(void) 1207eb188d0eSMatt Porter { 1208eb188d0eSMatt Porter struct rio_dev *rdev; 1209eb188d0eSMatt Porter int i; 1210eb188d0eSMatt Porter u8 sport; 1211eb188d0eSMatt Porter 1212eb188d0eSMatt Porter list_for_each_entry(rdev, &rio_devices, global_list) 1213818a04a0SAlexandre Bounine if (rio_is_switch(rdev)) { 1214a93192a5SAlexandre Bounine rio_lock_device(rdev->net->hport, rdev->destid, 1215a93192a5SAlexandre Bounine rdev->hopcount, 1000); 1216e0423236SZhang Wei for (i = 0; 1217e0423236SZhang Wei i < RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size); 1218e0423236SZhang Wei i++) { 1219a93192a5SAlexandre Bounine if (rio_route_get_entry(rdev, 1220818a04a0SAlexandre Bounine RIO_GLOBAL_TABLE, i, &sport, 0) < 0) 1221eb188d0eSMatt Porter continue; 1222eb188d0eSMatt Porter rdev->rswitch->route_table[i] = sport; 1223eb188d0eSMatt Porter } 1224818a04a0SAlexandre Bounine 1225818a04a0SAlexandre Bounine rio_unlock_device(rdev->net->hport, 1226a93192a5SAlexandre Bounine rdev->destid, 1227a93192a5SAlexandre Bounine rdev->hopcount); 1228818a04a0SAlexandre Bounine } 1229eb188d0eSMatt Porter } 1230eb188d0eSMatt Porter 1231eb188d0eSMatt Porter /** 1232eb188d0eSMatt Porter * rio_enum_timeout- Signal that enumeration timed out 1233eb188d0eSMatt Porter * @data: Address of timeout flag. 1234eb188d0eSMatt Porter * 1235eb188d0eSMatt Porter * When the enumeration complete timer expires, set a flag that 1236eb188d0eSMatt Porter * signals to the discovery process that enumeration did not 1237eb188d0eSMatt Porter * complete in a sane amount of time. 1238eb188d0eSMatt Porter */ 1239eb188d0eSMatt Porter static void rio_enum_timeout(unsigned long data) 1240eb188d0eSMatt Porter { 1241eb188d0eSMatt Porter /* Enumeration timed out, set flag */ 1242eb188d0eSMatt Porter *(int *)data = 1; 1243eb188d0eSMatt Porter } 1244eb188d0eSMatt Porter 1245eb188d0eSMatt Porter /** 1246eb188d0eSMatt Porter * rio_disc_mport- Start discovery through a master port 1247eb188d0eSMatt Porter * @mport: Master port to send transactions 1248eb188d0eSMatt Porter * 1249eb188d0eSMatt Porter * Starts the discovery process. If we have an active link, 1250eb188d0eSMatt Porter * then wait for the signal that enumeration is complete. 1251eb188d0eSMatt Porter * When enumeration completion is signaled, start recursive 1252eb188d0eSMatt Porter * peer discovery. Returns %0 if discovery succeeds or %-EBUSY 1253eb188d0eSMatt Porter * on failure. 1254eb188d0eSMatt Porter */ 125537d33d15SAl Viro int __devinit rio_disc_mport(struct rio_mport *mport) 1256eb188d0eSMatt Porter { 1257eb188d0eSMatt Porter struct rio_net *net = NULL; 1258eb188d0eSMatt Porter int enum_timeout_flag = 0; 1259eb188d0eSMatt Porter 1260eb188d0eSMatt Porter printk(KERN_INFO "RIO: discover master port %d, %s\n", mport->id, 1261eb188d0eSMatt Porter mport->name); 1262eb188d0eSMatt Porter 1263eb188d0eSMatt Porter /* If master port has an active link, allocate net and discover peers */ 1264eb188d0eSMatt Porter if (rio_mport_is_active(mport)) { 1265eb188d0eSMatt Porter if (!(net = rio_alloc_net(mport))) { 1266eb188d0eSMatt Porter printk(KERN_ERR "RIO: Failed to allocate new net\n"); 1267eb188d0eSMatt Porter goto bail; 1268eb188d0eSMatt Porter } 1269eb188d0eSMatt Porter 1270eb188d0eSMatt Porter pr_debug("RIO: wait for enumeration complete..."); 1271eb188d0eSMatt Porter 1272eb188d0eSMatt Porter rio_enum_timer.expires = 1273eb188d0eSMatt Porter jiffies + CONFIG_RAPIDIO_DISC_TIMEOUT * HZ; 1274eb188d0eSMatt Porter rio_enum_timer.data = (unsigned long)&enum_timeout_flag; 1275eb188d0eSMatt Porter add_timer(&rio_enum_timer); 1276eb188d0eSMatt Porter while (!rio_enum_complete(mport)) { 1277eb188d0eSMatt Porter mdelay(1); 1278eb188d0eSMatt Porter if (enum_timeout_flag) { 1279eb188d0eSMatt Porter del_timer_sync(&rio_enum_timer); 1280eb188d0eSMatt Porter goto timeout; 1281eb188d0eSMatt Porter } 1282eb188d0eSMatt Porter } 1283eb188d0eSMatt Porter del_timer_sync(&rio_enum_timer); 1284eb188d0eSMatt Porter 1285eb188d0eSMatt Porter pr_debug("done\n"); 1286818a04a0SAlexandre Bounine 1287818a04a0SAlexandre Bounine /* Read DestID assigned by enumerator */ 1288818a04a0SAlexandre Bounine rio_local_read_config_32(mport, RIO_DID_CSR, 1289818a04a0SAlexandre Bounine &mport->host_deviceid); 1290818a04a0SAlexandre Bounine mport->host_deviceid = RIO_GET_DID(mport->sys_size, 1291818a04a0SAlexandre Bounine mport->host_deviceid); 1292818a04a0SAlexandre Bounine 1293e0423236SZhang Wei if (rio_disc_peer(net, mport, RIO_ANY_DESTID(mport->sys_size), 1294e0423236SZhang Wei 0) < 0) { 1295eb188d0eSMatt Porter printk(KERN_INFO 1296eb188d0eSMatt Porter "RIO: master port %d device has failed discovery\n", 1297eb188d0eSMatt Porter mport->id); 1298eb188d0eSMatt Porter goto bail; 1299eb188d0eSMatt Porter } 1300eb188d0eSMatt Porter 1301eb188d0eSMatt Porter rio_build_route_tables(); 1302eb188d0eSMatt Porter } 1303eb188d0eSMatt Porter 1304eb188d0eSMatt Porter return 0; 1305eb188d0eSMatt Porter 1306eb188d0eSMatt Porter timeout: 1307eb188d0eSMatt Porter pr_debug("timeout\n"); 1308eb188d0eSMatt Porter bail: 1309eb188d0eSMatt Porter return -EBUSY; 1310eb188d0eSMatt Porter } 1311