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; 381eb188d0eSMatt Porter 382dd00cc48SYoann Padioleau rdev = kzalloc(sizeof(struct rio_dev), GFP_KERNEL); 383eb188d0eSMatt Porter if (!rdev) 3845f28c520SYang Li return NULL; 385eb188d0eSMatt Porter 386eb188d0eSMatt Porter rdev->net = net; 387eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, RIO_DEV_ID_CAR, 388eb188d0eSMatt Porter &result); 389eb188d0eSMatt Porter rdev->did = result >> 16; 390eb188d0eSMatt Porter rdev->vid = result & 0xffff; 391eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, RIO_DEV_INFO_CAR, 392eb188d0eSMatt Porter &rdev->device_rev); 393eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, RIO_ASM_ID_CAR, 394eb188d0eSMatt Porter &result); 395eb188d0eSMatt Porter rdev->asm_did = result >> 16; 396eb188d0eSMatt Porter rdev->asm_vid = result & 0xffff; 397eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, RIO_ASM_INFO_CAR, 398eb188d0eSMatt Porter &result); 399eb188d0eSMatt Porter rdev->asm_rev = result >> 16; 400eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, RIO_PEF_CAR, 401eb188d0eSMatt Porter &rdev->pef); 402e5cabeb3SAlexandre Bounine if (rdev->pef & RIO_PEF_EXT_FEATURES) { 403eb188d0eSMatt Porter rdev->efptr = result & 0xffff; 404e5cabeb3SAlexandre Bounine rdev->phys_efptr = rio_mport_get_physefb(port, 0, destid, 405e5cabeb3SAlexandre Bounine hopcount); 406e5cabeb3SAlexandre Bounine 407e5cabeb3SAlexandre Bounine rdev->em_efptr = rio_mport_get_feature(port, 0, destid, 408e5cabeb3SAlexandre Bounine hopcount, RIO_EFB_ERR_MGMNT); 409e5cabeb3SAlexandre Bounine } 410eb188d0eSMatt Porter 411ae05cbd5SAlexandre Bounine if (rdev->pef & (RIO_PEF_SWITCH | RIO_PEF_MULTIPORT)) { 412ae05cbd5SAlexandre Bounine rio_mport_read_config_32(port, destid, hopcount, 413ae05cbd5SAlexandre Bounine RIO_SWP_INFO_CAR, &rdev->swpinfo); 414ae05cbd5SAlexandre Bounine } 415ae05cbd5SAlexandre Bounine 416eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, RIO_SRC_OPS_CAR, 417eb188d0eSMatt Porter &rdev->src_ops); 418eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, RIO_DST_OPS_CAR, 419eb188d0eSMatt Porter &rdev->dst_ops); 420eb188d0eSMatt Porter 421af84ca38SAlexandre Bounine if (do_enum) { 422af84ca38SAlexandre Bounine /* Assign component tag to device */ 423af84ca38SAlexandre Bounine if (next_comptag >= 0x10000) { 424af84ca38SAlexandre Bounine pr_err("RIO: Component Tag Counter Overflow\n"); 425af84ca38SAlexandre Bounine goto cleanup; 426af84ca38SAlexandre Bounine } 427af84ca38SAlexandre Bounine rio_mport_write_config_32(port, destid, hopcount, 428af84ca38SAlexandre Bounine RIO_COMPONENT_TAG_CSR, next_comptag); 429af84ca38SAlexandre Bounine rdev->comp_tag = next_comptag++; 430af84ca38SAlexandre Bounine } 431af84ca38SAlexandre Bounine 432c70555b0SAlexandre Bounine if (rio_device_has_destid(port, rdev->src_ops, rdev->dst_ops)) { 433c70555b0SAlexandre Bounine if (do_enum) { 434eb188d0eSMatt Porter rio_set_device_id(port, destid, hopcount, next_destid); 435eb188d0eSMatt Porter rdev->destid = next_destid++; 436eb188d0eSMatt Porter if (next_destid == port->host_deviceid) 437eb188d0eSMatt Porter next_destid++; 438eb188d0eSMatt Porter } else 439eb188d0eSMatt Porter rdev->destid = rio_get_device_id(port, destid, hopcount); 440c70555b0SAlexandre Bounine } else 441c70555b0SAlexandre Bounine /* Switch device has an associated destID */ 442c70555b0SAlexandre Bounine rdev->destid = RIO_INVALID_DESTID; 443eb188d0eSMatt Porter 444eb188d0eSMatt Porter /* If a PE has both switch and other functions, show it as a switch */ 445eb188d0eSMatt Porter if (rio_is_switch(rdev)) { 44668fe4df5SAlexandre Bounine rswitch = kzalloc(sizeof(*rswitch) + 44768fe4df5SAlexandre Bounine RIO_GET_TOTAL_PORTS(rdev->swpinfo) * 44868fe4df5SAlexandre Bounine sizeof(rswitch->nextdev[0]), 44968fe4df5SAlexandre Bounine GFP_KERNEL); 4505f28c520SYang Li if (!rswitch) 4515f28c520SYang Li goto cleanup; 452eb188d0eSMatt Porter rswitch->switchid = next_switchid; 453eb188d0eSMatt Porter rswitch->hopcount = hopcount; 454c70555b0SAlexandre Bounine rswitch->destid = destid; 455e5cabeb3SAlexandre Bounine rswitch->port_ok = 0; 456e0423236SZhang Wei rswitch->route_table = kzalloc(sizeof(u8)* 457e0423236SZhang Wei RIO_MAX_ROUTE_ENTRIES(port->sys_size), 458e0423236SZhang Wei GFP_KERNEL); 4595f28c520SYang Li if (!rswitch->route_table) 4605f28c520SYang Li goto cleanup; 461eb188d0eSMatt Porter /* Initialize switch route table */ 462e0423236SZhang Wei for (rdid = 0; rdid < RIO_MAX_ROUTE_ENTRIES(port->sys_size); 463e0423236SZhang Wei rdid++) 464eb188d0eSMatt Porter rswitch->route_table[rdid] = RIO_INVALID_ROUTE; 465eb188d0eSMatt Porter rdev->rswitch = rswitch; 466ae05cbd5SAlexandre Bounine rswitch->rdev = rdev; 467b53c7583SKay Sievers dev_set_name(&rdev->dev, "%02x:s:%04x", rdev->net->id, 468eb188d0eSMatt Porter rdev->rswitch->switchid); 469058f88d6SAlexandre Bounine rio_switch_init(rdev, do_enum); 470eb188d0eSMatt Porter 47107590ff0SAlexandre Bounine if (do_enum && rdev->rswitch->clr_table) 47207590ff0SAlexandre Bounine rdev->rswitch->clr_table(port, destid, hopcount, 47307590ff0SAlexandre Bounine RIO_GLOBAL_TABLE); 47407590ff0SAlexandre Bounine 475eb188d0eSMatt Porter list_add_tail(&rswitch->node, &rio_switches); 476eb188d0eSMatt Porter 477933af4a6SThomas Moll } else { 478933af4a6SThomas Moll if (do_enum) 479933af4a6SThomas Moll /*Enable Input Output Port (transmitter reviever)*/ 480933af4a6SThomas Moll rio_enable_rx_tx_port(port, 0, destid, hopcount, 0); 481933af4a6SThomas Moll 482b53c7583SKay Sievers dev_set_name(&rdev->dev, "%02x:e:%04x", rdev->net->id, 483eb188d0eSMatt Porter rdev->destid); 484933af4a6SThomas Moll } 485eb188d0eSMatt Porter 486eb188d0eSMatt Porter rdev->dev.bus = &rio_bus_type; 4872c70f022SAlexandre Bounine rdev->dev.parent = &rio_bus; 488eb188d0eSMatt Porter 489eb188d0eSMatt Porter device_initialize(&rdev->dev); 490eb188d0eSMatt Porter rdev->dev.release = rio_release_dev; 491eb188d0eSMatt Porter rio_dev_get(rdev); 492eb188d0eSMatt Porter 493284901a9SYang Hongyang rdev->dma_mask = DMA_BIT_MASK(32); 494fa78cc51SMatt Porter rdev->dev.dma_mask = &rdev->dma_mask; 495284901a9SYang Hongyang rdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); 496eb188d0eSMatt Porter 497eb188d0eSMatt Porter if ((rdev->pef & RIO_PEF_INB_DOORBELL) && 498eb188d0eSMatt Porter (rdev->dst_ops & RIO_DST_OPS_DOORBELL)) 499eb188d0eSMatt Porter rio_init_dbell_res(&rdev->riores[RIO_DOORBELL_RESOURCE], 500eb188d0eSMatt Porter 0, 0xffff); 501eb188d0eSMatt Porter 5025f28c520SYang Li ret = rio_add_device(rdev); 5035f28c520SYang Li if (ret) 5045f28c520SYang Li goto cleanup; 505eb188d0eSMatt Porter 506eb188d0eSMatt Porter return rdev; 5075f28c520SYang Li 5085f28c520SYang Li cleanup: 5095f28c520SYang Li if (rswitch) { 5105f28c520SYang Li kfree(rswitch->route_table); 5115f28c520SYang Li kfree(rswitch); 5125f28c520SYang Li } 5135f28c520SYang Li kfree(rdev); 5145f28c520SYang Li return NULL; 515eb188d0eSMatt Porter } 516eb188d0eSMatt Porter 517eb188d0eSMatt Porter /** 518eb188d0eSMatt Porter * rio_sport_is_active- Tests if a switch port has an active connection. 519eb188d0eSMatt Porter * @port: Master port to send transaction 520eb188d0eSMatt Porter * @destid: Associated destination ID for switch 521eb188d0eSMatt Porter * @hopcount: Hopcount to reach switch 522eb188d0eSMatt Porter * @sport: Switch port number 523eb188d0eSMatt Porter * 524eb188d0eSMatt Porter * Reads the port error status CSR for a particular switch port to 525eb188d0eSMatt Porter * determine if the port has an active link. Returns 526e5cabeb3SAlexandre Bounine * %RIO_PORT_N_ERR_STS_PORT_OK if the port is active or %0 if it is 527eb188d0eSMatt Porter * inactive. 528eb188d0eSMatt Porter */ 529eb188d0eSMatt Porter static int 530eb188d0eSMatt Porter rio_sport_is_active(struct rio_mport *port, u16 destid, u8 hopcount, int sport) 531eb188d0eSMatt Porter { 532e5cabeb3SAlexandre Bounine u32 result = 0; 533eb188d0eSMatt Porter u32 ext_ftr_ptr; 534eb188d0eSMatt Porter 535e5cabeb3SAlexandre Bounine ext_ftr_ptr = rio_mport_get_efb(port, 0, destid, hopcount, 0); 536eb188d0eSMatt Porter 537e5cabeb3SAlexandre Bounine while (ext_ftr_ptr) { 538e5cabeb3SAlexandre Bounine rio_mport_read_config_32(port, destid, hopcount, 539e5cabeb3SAlexandre Bounine ext_ftr_ptr, &result); 540e5cabeb3SAlexandre Bounine result = RIO_GET_BLOCK_ID(result); 541e5cabeb3SAlexandre Bounine if ((result == RIO_EFB_SER_EP_FREE_ID) || 542e5cabeb3SAlexandre Bounine (result == RIO_EFB_SER_EP_FREE_ID_V13P) || 543e5cabeb3SAlexandre Bounine (result == RIO_EFB_SER_EP_FREC_ID)) 544eb188d0eSMatt Porter break; 545e5cabeb3SAlexandre Bounine 546e5cabeb3SAlexandre Bounine ext_ftr_ptr = rio_mport_get_efb(port, 0, destid, hopcount, 547e5cabeb3SAlexandre Bounine ext_ftr_ptr); 548e5cabeb3SAlexandre Bounine } 549eb188d0eSMatt Porter 550eb188d0eSMatt Porter if (ext_ftr_ptr) 551eb188d0eSMatt Porter rio_mport_read_config_32(port, destid, hopcount, 552eb188d0eSMatt Porter ext_ftr_ptr + 553eb188d0eSMatt Porter RIO_PORT_N_ERR_STS_CSR(sport), 554eb188d0eSMatt Porter &result); 555eb188d0eSMatt Porter 556e5cabeb3SAlexandre Bounine return result & RIO_PORT_N_ERR_STS_PORT_OK; 557eb188d0eSMatt Porter } 558eb188d0eSMatt Porter 559eb188d0eSMatt Porter /** 560818a04a0SAlexandre Bounine * rio_lock_device - Acquires host device lock for specified device 561818a04a0SAlexandre Bounine * @port: Master port to send transaction 562818a04a0SAlexandre Bounine * @destid: Destination ID for device/switch 563818a04a0SAlexandre Bounine * @hopcount: Hopcount to reach switch 564818a04a0SAlexandre Bounine * @wait_ms: Max wait time in msec (0 = no timeout) 565818a04a0SAlexandre Bounine * 566818a04a0SAlexandre Bounine * Attepts to acquire host device lock for specified device 567818a04a0SAlexandre Bounine * Returns 0 if device lock acquired or EINVAL if timeout expires. 568818a04a0SAlexandre Bounine */ 569818a04a0SAlexandre Bounine static int 570818a04a0SAlexandre Bounine rio_lock_device(struct rio_mport *port, u16 destid, u8 hopcount, int wait_ms) 571818a04a0SAlexandre Bounine { 572818a04a0SAlexandre Bounine u32 result; 573818a04a0SAlexandre Bounine int tcnt = 0; 574818a04a0SAlexandre Bounine 575818a04a0SAlexandre Bounine /* Attempt to acquire device lock */ 576818a04a0SAlexandre Bounine rio_mport_write_config_32(port, destid, hopcount, 577818a04a0SAlexandre Bounine RIO_HOST_DID_LOCK_CSR, port->host_deviceid); 578818a04a0SAlexandre Bounine rio_mport_read_config_32(port, destid, hopcount, 579818a04a0SAlexandre Bounine RIO_HOST_DID_LOCK_CSR, &result); 580818a04a0SAlexandre Bounine 581818a04a0SAlexandre Bounine while (result != port->host_deviceid) { 582818a04a0SAlexandre Bounine if (wait_ms != 0 && tcnt == wait_ms) { 583818a04a0SAlexandre Bounine pr_debug("RIO: timeout when locking device %x:%x\n", 584818a04a0SAlexandre Bounine destid, hopcount); 585818a04a0SAlexandre Bounine return -EINVAL; 586818a04a0SAlexandre Bounine } 587818a04a0SAlexandre Bounine 588818a04a0SAlexandre Bounine /* Delay a bit */ 589818a04a0SAlexandre Bounine mdelay(1); 590818a04a0SAlexandre Bounine tcnt++; 591818a04a0SAlexandre Bounine /* Try to acquire device lock again */ 592818a04a0SAlexandre Bounine rio_mport_write_config_32(port, destid, 593818a04a0SAlexandre Bounine hopcount, 594818a04a0SAlexandre Bounine RIO_HOST_DID_LOCK_CSR, 595818a04a0SAlexandre Bounine port->host_deviceid); 596818a04a0SAlexandre Bounine rio_mport_read_config_32(port, destid, 597818a04a0SAlexandre Bounine hopcount, 598818a04a0SAlexandre Bounine RIO_HOST_DID_LOCK_CSR, &result); 599818a04a0SAlexandre Bounine } 600818a04a0SAlexandre Bounine 601818a04a0SAlexandre Bounine return 0; 602818a04a0SAlexandre Bounine } 603818a04a0SAlexandre Bounine 604818a04a0SAlexandre Bounine /** 605818a04a0SAlexandre Bounine * rio_unlock_device - Releases host device lock for specified device 606818a04a0SAlexandre Bounine * @port: Master port to send transaction 607818a04a0SAlexandre Bounine * @destid: Destination ID for device/switch 608818a04a0SAlexandre Bounine * @hopcount: Hopcount to reach switch 609818a04a0SAlexandre Bounine * 610818a04a0SAlexandre Bounine * Returns 0 if device lock released or EINVAL if fails. 611818a04a0SAlexandre Bounine */ 612818a04a0SAlexandre Bounine static int 613818a04a0SAlexandre Bounine rio_unlock_device(struct rio_mport *port, u16 destid, u8 hopcount) 614818a04a0SAlexandre Bounine { 615818a04a0SAlexandre Bounine u32 result; 616818a04a0SAlexandre Bounine 617818a04a0SAlexandre Bounine /* Release device lock */ 618818a04a0SAlexandre Bounine rio_mport_write_config_32(port, destid, 619818a04a0SAlexandre Bounine hopcount, 620818a04a0SAlexandre Bounine RIO_HOST_DID_LOCK_CSR, 621818a04a0SAlexandre Bounine port->host_deviceid); 622818a04a0SAlexandre Bounine rio_mport_read_config_32(port, destid, hopcount, 623818a04a0SAlexandre Bounine RIO_HOST_DID_LOCK_CSR, &result); 624818a04a0SAlexandre Bounine if ((result & 0xffff) != 0xffff) { 625818a04a0SAlexandre Bounine pr_debug("RIO: badness when releasing device lock %x:%x\n", 626818a04a0SAlexandre Bounine destid, hopcount); 627818a04a0SAlexandre Bounine return -EINVAL; 628818a04a0SAlexandre Bounine } 629818a04a0SAlexandre Bounine 630818a04a0SAlexandre Bounine return 0; 631818a04a0SAlexandre Bounine } 632818a04a0SAlexandre Bounine 633818a04a0SAlexandre Bounine /** 634eb188d0eSMatt Porter * rio_route_add_entry- Add a route entry to a switch routing table 635eb188d0eSMatt Porter * @mport: Master port to send transaction 636c70555b0SAlexandre Bounine * @rswitch: Switch device 637eb188d0eSMatt Porter * @table: Routing table ID 638eb188d0eSMatt Porter * @route_destid: Destination ID to be routed 639eb188d0eSMatt Porter * @route_port: Port number to be routed 640818a04a0SAlexandre Bounine * @lock: lock switch device flag 641eb188d0eSMatt Porter * 642eb188d0eSMatt Porter * Calls the switch specific add_entry() method to add a route entry 643eb188d0eSMatt Porter * on a switch. The route table can be specified using the @table 644eb188d0eSMatt Porter * argument if a switch has per port routing tables or the normal 645eb188d0eSMatt Porter * use is to specific all tables (or the global table) by passing 646eb188d0eSMatt Porter * %RIO_GLOBAL_TABLE in @table. Returns %0 on success or %-EINVAL 647eb188d0eSMatt Porter * on failure. 648eb188d0eSMatt Porter */ 649818a04a0SAlexandre Bounine static int 650818a04a0SAlexandre Bounine rio_route_add_entry(struct rio_mport *mport, struct rio_switch *rswitch, 651818a04a0SAlexandre Bounine u16 table, u16 route_destid, u8 route_port, int lock) 652eb188d0eSMatt Porter { 653818a04a0SAlexandre Bounine int rc; 654818a04a0SAlexandre Bounine 655818a04a0SAlexandre Bounine if (lock) { 656818a04a0SAlexandre Bounine rc = rio_lock_device(mport, rswitch->destid, 657818a04a0SAlexandre Bounine rswitch->hopcount, 1000); 658818a04a0SAlexandre Bounine if (rc) 659818a04a0SAlexandre Bounine return rc; 660818a04a0SAlexandre Bounine } 661818a04a0SAlexandre Bounine 662818a04a0SAlexandre Bounine rc = rswitch->add_entry(mport, rswitch->destid, 663c70555b0SAlexandre Bounine rswitch->hopcount, table, 664eb188d0eSMatt Porter route_destid, route_port); 665818a04a0SAlexandre Bounine if (lock) 666818a04a0SAlexandre Bounine rio_unlock_device(mport, rswitch->destid, rswitch->hopcount); 667818a04a0SAlexandre Bounine 668818a04a0SAlexandre Bounine return rc; 669eb188d0eSMatt Porter } 670eb188d0eSMatt Porter 671eb188d0eSMatt Porter /** 672eb188d0eSMatt Porter * rio_route_get_entry- Read a route entry in a switch routing table 673eb188d0eSMatt Porter * @mport: Master port to send transaction 674c70555b0SAlexandre Bounine * @rswitch: Switch device 675eb188d0eSMatt Porter * @table: Routing table ID 676eb188d0eSMatt Porter * @route_destid: Destination ID to be routed 677eb188d0eSMatt Porter * @route_port: Pointer to read port number into 678818a04a0SAlexandre Bounine * @lock: lock switch device flag 679eb188d0eSMatt Porter * 680eb188d0eSMatt Porter * Calls the switch specific get_entry() method to read a route entry 681eb188d0eSMatt Porter * in a switch. The route table can be specified using the @table 682eb188d0eSMatt Porter * argument if a switch has per port routing tables or the normal 683eb188d0eSMatt Porter * use is to specific all tables (or the global table) by passing 684eb188d0eSMatt Porter * %RIO_GLOBAL_TABLE in @table. Returns %0 on success or %-EINVAL 685eb188d0eSMatt Porter * on failure. 686eb188d0eSMatt Porter */ 687eb188d0eSMatt Porter static int 688c70555b0SAlexandre Bounine rio_route_get_entry(struct rio_mport *mport, struct rio_switch *rswitch, u16 table, 689818a04a0SAlexandre Bounine u16 route_destid, u8 *route_port, int lock) 690eb188d0eSMatt Porter { 691818a04a0SAlexandre Bounine int rc; 692818a04a0SAlexandre Bounine 693818a04a0SAlexandre Bounine if (lock) { 694818a04a0SAlexandre Bounine rc = rio_lock_device(mport, rswitch->destid, 695818a04a0SAlexandre Bounine rswitch->hopcount, 1000); 696818a04a0SAlexandre Bounine if (rc) 697818a04a0SAlexandre Bounine return rc; 698818a04a0SAlexandre Bounine } 699818a04a0SAlexandre Bounine 700818a04a0SAlexandre Bounine rc = rswitch->get_entry(mport, rswitch->destid, 701c70555b0SAlexandre Bounine rswitch->hopcount, table, 702eb188d0eSMatt Porter route_destid, route_port); 703818a04a0SAlexandre Bounine if (lock) 704818a04a0SAlexandre Bounine rio_unlock_device(mport, rswitch->destid, rswitch->hopcount); 705818a04a0SAlexandre Bounine 706818a04a0SAlexandre Bounine return rc; 707eb188d0eSMatt Porter } 708eb188d0eSMatt Porter 709eb188d0eSMatt Porter /** 710eb188d0eSMatt Porter * rio_get_host_deviceid_lock- Reads the Host Device ID Lock CSR on a device 711eb188d0eSMatt Porter * @port: Master port to send transaction 712eb188d0eSMatt Porter * @hopcount: Number of hops to the device 713eb188d0eSMatt Porter * 714eb188d0eSMatt Porter * Used during enumeration to read the Host Device ID Lock CSR on a 715eb188d0eSMatt Porter * RIO device. Returns the value of the lock register. 716eb188d0eSMatt Porter */ 717eb188d0eSMatt Porter static u16 rio_get_host_deviceid_lock(struct rio_mport *port, u8 hopcount) 718eb188d0eSMatt Porter { 719eb188d0eSMatt Porter u32 result; 720eb188d0eSMatt Porter 721e0423236SZhang Wei rio_mport_read_config_32(port, RIO_ANY_DESTID(port->sys_size), hopcount, 722eb188d0eSMatt Porter RIO_HOST_DID_LOCK_CSR, &result); 723eb188d0eSMatt Porter 724eb188d0eSMatt Porter return (u16) (result & 0xffff); 725eb188d0eSMatt Porter } 726eb188d0eSMatt Porter 727eb188d0eSMatt Porter /** 728eb188d0eSMatt Porter * rio_enum_peer- Recursively enumerate a RIO network through a master port 729eb188d0eSMatt Porter * @net: RIO network being enumerated 730eb188d0eSMatt Porter * @port: Master port to send transactions 731eb188d0eSMatt Porter * @hopcount: Number of hops into the network 73268fe4df5SAlexandre Bounine * @prev: Previous RIO device connected to the enumerated one 73368fe4df5SAlexandre Bounine * @prev_port: Port on previous RIO device 734eb188d0eSMatt Porter * 735eb188d0eSMatt Porter * Recursively enumerates a RIO network. Transactions are sent via the 736eb188d0eSMatt Porter * master port passed in @port. 737eb188d0eSMatt Porter */ 738181a6ff0SLi Yang static int __devinit rio_enum_peer(struct rio_net *net, struct rio_mport *port, 73968fe4df5SAlexandre Bounine u8 hopcount, struct rio_dev *prev, int prev_port) 740eb188d0eSMatt Porter { 741eb188d0eSMatt Porter int port_num; 742eb188d0eSMatt Porter int cur_destid; 743c70555b0SAlexandre Bounine int sw_destid; 744c70555b0SAlexandre Bounine int sw_inport; 745eb188d0eSMatt Porter struct rio_dev *rdev; 746eb188d0eSMatt Porter u16 destid; 747af84ca38SAlexandre Bounine u32 regval; 748eb188d0eSMatt Porter int tmp; 749eb188d0eSMatt Porter 750e274e0edSAlexandre Bounine if (rio_mport_chk_dev_access(port, 751e274e0edSAlexandre Bounine RIO_ANY_DESTID(port->sys_size), hopcount)) { 752e274e0edSAlexandre Bounine pr_debug("RIO: device access check failed\n"); 753e274e0edSAlexandre Bounine return -1; 754e274e0edSAlexandre Bounine } 755e274e0edSAlexandre Bounine 756eb188d0eSMatt Porter if (rio_get_host_deviceid_lock(port, hopcount) == port->host_deviceid) { 757eb188d0eSMatt Porter pr_debug("RIO: PE already discovered by this host\n"); 758eb188d0eSMatt Porter /* 759eb188d0eSMatt Porter * Already discovered by this host. Add it as another 760af84ca38SAlexandre Bounine * link to the existing device. 761eb188d0eSMatt Porter */ 762af84ca38SAlexandre Bounine rio_mport_read_config_32(port, RIO_ANY_DESTID(port->sys_size), 763af84ca38SAlexandre Bounine hopcount, RIO_COMPONENT_TAG_CSR, ®val); 764af84ca38SAlexandre Bounine 765af84ca38SAlexandre Bounine if (regval) { 766af84ca38SAlexandre Bounine rdev = rio_get_comptag((regval & 0xffff), NULL); 767af84ca38SAlexandre Bounine 768af84ca38SAlexandre Bounine if (rdev && prev && rio_is_switch(prev)) { 769af84ca38SAlexandre Bounine pr_debug("RIO: redundant path to %s\n", 770af84ca38SAlexandre Bounine rio_name(rdev)); 771af84ca38SAlexandre Bounine prev->rswitch->nextdev[prev_port] = rdev; 772af84ca38SAlexandre Bounine } 773af84ca38SAlexandre Bounine } 774af84ca38SAlexandre Bounine 775eb188d0eSMatt Porter return 0; 776eb188d0eSMatt Porter } 777eb188d0eSMatt Porter 778eb188d0eSMatt Porter /* Attempt to acquire device lock */ 779e0423236SZhang Wei rio_mport_write_config_32(port, RIO_ANY_DESTID(port->sys_size), 780e0423236SZhang Wei hopcount, 781eb188d0eSMatt Porter RIO_HOST_DID_LOCK_CSR, port->host_deviceid); 782eb188d0eSMatt Porter while ((tmp = rio_get_host_deviceid_lock(port, hopcount)) 783eb188d0eSMatt Porter < port->host_deviceid) { 784eb188d0eSMatt Porter /* Delay a bit */ 785eb188d0eSMatt Porter mdelay(1); 786eb188d0eSMatt Porter /* Attempt to acquire device lock again */ 787e0423236SZhang Wei rio_mport_write_config_32(port, RIO_ANY_DESTID(port->sys_size), 788e0423236SZhang Wei hopcount, 789eb188d0eSMatt Porter RIO_HOST_DID_LOCK_CSR, 790eb188d0eSMatt Porter port->host_deviceid); 791eb188d0eSMatt Porter } 792eb188d0eSMatt Porter 793eb188d0eSMatt Porter if (rio_get_host_deviceid_lock(port, hopcount) > port->host_deviceid) { 794eb188d0eSMatt Porter pr_debug( 795eb188d0eSMatt Porter "RIO: PE locked by a higher priority host...retreating\n"); 796eb188d0eSMatt Porter return -1; 797eb188d0eSMatt Porter } 798eb188d0eSMatt Porter 799eb188d0eSMatt Porter /* Setup new RIO device */ 800e0423236SZhang Wei rdev = rio_setup_device(net, port, RIO_ANY_DESTID(port->sys_size), 801e0423236SZhang Wei hopcount, 1); 802e0423236SZhang Wei if (rdev) { 803eb188d0eSMatt Porter /* Add device to the global and bus/net specific list. */ 804eb188d0eSMatt Porter list_add_tail(&rdev->net_list, &net->devices); 80568fe4df5SAlexandre Bounine rdev->prev = prev; 80668fe4df5SAlexandre Bounine if (prev && rio_is_switch(prev)) 80768fe4df5SAlexandre Bounine prev->rswitch->nextdev[prev_port] = rdev; 808eb188d0eSMatt Porter } else 809eb188d0eSMatt Porter return -1; 810eb188d0eSMatt Porter 811eb188d0eSMatt Porter if (rio_is_switch(rdev)) { 812eb188d0eSMatt Porter next_switchid++; 813ae05cbd5SAlexandre Bounine sw_inport = RIO_GET_PORT_NUM(rdev->swpinfo); 814c70555b0SAlexandre Bounine rio_route_add_entry(port, rdev->rswitch, RIO_GLOBAL_TABLE, 815818a04a0SAlexandre Bounine port->host_deviceid, sw_inport, 0); 816c70555b0SAlexandre Bounine rdev->rswitch->route_table[port->host_deviceid] = sw_inport; 817eb188d0eSMatt Porter 818eb188d0eSMatt Porter for (destid = 0; destid < next_destid; destid++) { 819c70555b0SAlexandre Bounine if (destid == port->host_deviceid) 820c70555b0SAlexandre Bounine continue; 821c70555b0SAlexandre Bounine rio_route_add_entry(port, rdev->rswitch, RIO_GLOBAL_TABLE, 822818a04a0SAlexandre Bounine destid, sw_inport, 0); 823c70555b0SAlexandre Bounine rdev->rswitch->route_table[destid] = sw_inport; 824eb188d0eSMatt Porter } 825eb188d0eSMatt Porter 826eb188d0eSMatt Porter pr_debug( 827eb188d0eSMatt Porter "RIO: found %s (vid %4.4x did %4.4x) with %d ports\n", 82868fe4df5SAlexandre Bounine rio_name(rdev), rdev->vid, rdev->did, 82968fe4df5SAlexandre Bounine RIO_GET_TOTAL_PORTS(rdev->swpinfo)); 830c70555b0SAlexandre Bounine sw_destid = next_destid; 83168fe4df5SAlexandre Bounine for (port_num = 0; 83268fe4df5SAlexandre Bounine port_num < RIO_GET_TOTAL_PORTS(rdev->swpinfo); 83368fe4df5SAlexandre Bounine port_num++) { 834933af4a6SThomas Moll /*Enable Input Output Port (transmitter reviever)*/ 835933af4a6SThomas Moll rio_enable_rx_tx_port(port, 0, 836933af4a6SThomas Moll RIO_ANY_DESTID(port->sys_size), 837933af4a6SThomas Moll hopcount, port_num); 838933af4a6SThomas Moll 839e5cabeb3SAlexandre Bounine if (sw_inport == port_num) { 840e5cabeb3SAlexandre Bounine rdev->rswitch->port_ok |= (1 << port_num); 841eb188d0eSMatt Porter continue; 842e5cabeb3SAlexandre Bounine } 843eb188d0eSMatt Porter 844eb188d0eSMatt Porter cur_destid = next_destid; 845eb188d0eSMatt Porter 846eb188d0eSMatt Porter if (rio_sport_is_active 847e0423236SZhang Wei (port, RIO_ANY_DESTID(port->sys_size), hopcount, 848e0423236SZhang Wei port_num)) { 849eb188d0eSMatt Porter pr_debug( 850eb188d0eSMatt Porter "RIO: scanning device on port %d\n", 851eb188d0eSMatt Porter port_num); 852e5cabeb3SAlexandre Bounine rdev->rswitch->port_ok |= (1 << port_num); 853c70555b0SAlexandre Bounine rio_route_add_entry(port, rdev->rswitch, 854eb188d0eSMatt Porter RIO_GLOBAL_TABLE, 855e0423236SZhang Wei RIO_ANY_DESTID(port->sys_size), 856818a04a0SAlexandre Bounine port_num, 0); 857eb188d0eSMatt Porter 85868fe4df5SAlexandre Bounine if (rio_enum_peer(net, port, hopcount + 1, 85968fe4df5SAlexandre Bounine rdev, port_num) < 0) 860eb188d0eSMatt Porter return -1; 861eb188d0eSMatt Porter 862eb188d0eSMatt Porter /* Update routing tables */ 863eb188d0eSMatt Porter if (next_destid > cur_destid) { 864eb188d0eSMatt Porter for (destid = cur_destid; 865eb188d0eSMatt Porter destid < next_destid; destid++) { 866c70555b0SAlexandre Bounine if (destid == port->host_deviceid) 867c70555b0SAlexandre Bounine continue; 868c70555b0SAlexandre Bounine rio_route_add_entry(port, rdev->rswitch, 869eb188d0eSMatt Porter RIO_GLOBAL_TABLE, 870eb188d0eSMatt Porter destid, 871818a04a0SAlexandre Bounine port_num, 872818a04a0SAlexandre Bounine 0); 873eb188d0eSMatt Porter rdev->rswitch-> 874eb188d0eSMatt Porter route_table[destid] = 875eb188d0eSMatt Porter port_num; 876eb188d0eSMatt Porter } 877eb188d0eSMatt Porter } 878e5cabeb3SAlexandre Bounine } else { 879e5cabeb3SAlexandre Bounine /* If switch supports Error Management, 880e5cabeb3SAlexandre Bounine * set PORT_LOCKOUT bit for unused port 881e5cabeb3SAlexandre Bounine */ 882e5cabeb3SAlexandre Bounine if (rdev->em_efptr) 883e5cabeb3SAlexandre Bounine rio_set_port_lockout(rdev, port_num, 1); 884e5cabeb3SAlexandre Bounine 885e5cabeb3SAlexandre Bounine rdev->rswitch->port_ok &= ~(1 << port_num); 886eb188d0eSMatt Porter } 887eb188d0eSMatt Porter } 888c70555b0SAlexandre Bounine 889e5cabeb3SAlexandre Bounine /* Direct Port-write messages to the enumeratiing host */ 890e5cabeb3SAlexandre Bounine if ((rdev->src_ops & RIO_SRC_OPS_PORT_WRITE) && 891e5cabeb3SAlexandre Bounine (rdev->em_efptr)) { 892e5cabeb3SAlexandre Bounine rio_write_config_32(rdev, 893e5cabeb3SAlexandre Bounine rdev->em_efptr + RIO_EM_PW_TGT_DEVID, 894e5cabeb3SAlexandre Bounine (port->host_deviceid << 16) | 895e5cabeb3SAlexandre Bounine (port->sys_size << 15)); 896e5cabeb3SAlexandre Bounine } 897e5cabeb3SAlexandre Bounine 898e5cabeb3SAlexandre Bounine rio_init_em(rdev); 899e5cabeb3SAlexandre Bounine 900c70555b0SAlexandre Bounine /* Check for empty switch */ 901c70555b0SAlexandre Bounine if (next_destid == sw_destid) { 902c70555b0SAlexandre Bounine next_destid++; 903c70555b0SAlexandre Bounine if (next_destid == port->host_deviceid) 904c70555b0SAlexandre Bounine next_destid++; 905c70555b0SAlexandre Bounine } 906c70555b0SAlexandre Bounine 907c70555b0SAlexandre Bounine rdev->rswitch->destid = sw_destid; 908eb188d0eSMatt Porter } else 909eb188d0eSMatt Porter pr_debug("RIO: found %s (vid %4.4x did %4.4x)\n", 910eb188d0eSMatt Porter rio_name(rdev), rdev->vid, rdev->did); 911eb188d0eSMatt Porter 912eb188d0eSMatt Porter return 0; 913eb188d0eSMatt Porter } 914eb188d0eSMatt Porter 915eb188d0eSMatt Porter /** 916eb188d0eSMatt Porter * rio_enum_complete- Tests if enumeration of a network is complete 917eb188d0eSMatt Porter * @port: Master port to send transaction 918eb188d0eSMatt Porter * 919e5cabeb3SAlexandre Bounine * Tests the Component Tag CSR for non-zero value (enumeration 920e5cabeb3SAlexandre Bounine * complete flag). Return %1 if enumeration is complete or %0 if 921eb188d0eSMatt Porter * enumeration is incomplete. 922eb188d0eSMatt Porter */ 923eb188d0eSMatt Porter static int rio_enum_complete(struct rio_mport *port) 924eb188d0eSMatt Porter { 925af84ca38SAlexandre Bounine u32 regval; 926eb188d0eSMatt Porter 927af84ca38SAlexandre Bounine rio_local_read_config_32(port, port->phys_efptr + RIO_PORT_GEN_CTL_CSR, 928af84ca38SAlexandre Bounine ®val); 929af84ca38SAlexandre Bounine return (regval & RIO_PORT_GEN_MASTER) ? 1 : 0; 930eb188d0eSMatt Porter } 931eb188d0eSMatt Porter 932eb188d0eSMatt Porter /** 933eb188d0eSMatt Porter * rio_disc_peer- Recursively discovers a RIO network through a master port 934eb188d0eSMatt Porter * @net: RIO network being discovered 935eb188d0eSMatt Porter * @port: Master port to send transactions 936eb188d0eSMatt Porter * @destid: Current destination ID in network 937eb188d0eSMatt Porter * @hopcount: Number of hops into the network 938eb188d0eSMatt Porter * 939eb188d0eSMatt Porter * Recursively discovers a RIO network. Transactions are sent via the 940eb188d0eSMatt Porter * master port passed in @port. 941eb188d0eSMatt Porter */ 942181a6ff0SLi Yang static int __devinit 943eb188d0eSMatt Porter rio_disc_peer(struct rio_net *net, struct rio_mport *port, u16 destid, 944eb188d0eSMatt Porter u8 hopcount) 945eb188d0eSMatt Porter { 946eb188d0eSMatt Porter u8 port_num, route_port; 947eb188d0eSMatt Porter struct rio_dev *rdev; 948eb188d0eSMatt Porter u16 ndestid; 949eb188d0eSMatt Porter 950eb188d0eSMatt Porter /* Setup new RIO device */ 951eb188d0eSMatt Porter if ((rdev = rio_setup_device(net, port, destid, hopcount, 0))) { 952eb188d0eSMatt Porter /* Add device to the global and bus/net specific list. */ 953eb188d0eSMatt Porter list_add_tail(&rdev->net_list, &net->devices); 954eb188d0eSMatt Porter } else 955eb188d0eSMatt Porter return -1; 956eb188d0eSMatt Porter 957eb188d0eSMatt Porter if (rio_is_switch(rdev)) { 958eb188d0eSMatt Porter next_switchid++; 959eb188d0eSMatt Porter 960eb188d0eSMatt Porter /* Associated destid is how we accessed this switch */ 961eb188d0eSMatt Porter rdev->rswitch->destid = destid; 962eb188d0eSMatt Porter 963eb188d0eSMatt Porter pr_debug( 964eb188d0eSMatt Porter "RIO: found %s (vid %4.4x did %4.4x) with %d ports\n", 96568fe4df5SAlexandre Bounine rio_name(rdev), rdev->vid, rdev->did, 96668fe4df5SAlexandre Bounine RIO_GET_TOTAL_PORTS(rdev->swpinfo)); 96768fe4df5SAlexandre Bounine for (port_num = 0; 96868fe4df5SAlexandre Bounine port_num < RIO_GET_TOTAL_PORTS(rdev->swpinfo); 96968fe4df5SAlexandre Bounine port_num++) { 970ae05cbd5SAlexandre Bounine if (RIO_GET_PORT_NUM(rdev->swpinfo) == port_num) 971eb188d0eSMatt Porter continue; 972eb188d0eSMatt Porter 973eb188d0eSMatt Porter if (rio_sport_is_active 974eb188d0eSMatt Porter (port, destid, hopcount, port_num)) { 975eb188d0eSMatt Porter pr_debug( 976eb188d0eSMatt Porter "RIO: scanning device on port %d\n", 977eb188d0eSMatt Porter port_num); 978818a04a0SAlexandre Bounine 979818a04a0SAlexandre Bounine rio_lock_device(port, destid, hopcount, 1000); 980818a04a0SAlexandre Bounine 981e0423236SZhang Wei for (ndestid = 0; 982e0423236SZhang Wei ndestid < RIO_ANY_DESTID(port->sys_size); 983eb188d0eSMatt Porter ndestid++) { 984c70555b0SAlexandre Bounine rio_route_get_entry(port, rdev->rswitch, 985eb188d0eSMatt Porter RIO_GLOBAL_TABLE, 986eb188d0eSMatt Porter ndestid, 987818a04a0SAlexandre Bounine &route_port, 0); 988eb188d0eSMatt Porter if (route_port == port_num) 989eb188d0eSMatt Porter break; 990eb188d0eSMatt Porter } 991eb188d0eSMatt Porter 992af84ca38SAlexandre Bounine if (ndestid == RIO_ANY_DESTID(port->sys_size)) 993af84ca38SAlexandre Bounine continue; 994818a04a0SAlexandre Bounine rio_unlock_device(port, destid, hopcount); 995eb188d0eSMatt Porter if (rio_disc_peer 996eb188d0eSMatt Porter (net, port, ndestid, hopcount + 1) < 0) 997eb188d0eSMatt Porter return -1; 998eb188d0eSMatt Porter } 999eb188d0eSMatt Porter } 1000eb188d0eSMatt Porter } else 1001eb188d0eSMatt Porter pr_debug("RIO: found %s (vid %4.4x did %4.4x)\n", 1002eb188d0eSMatt Porter rio_name(rdev), rdev->vid, rdev->did); 1003eb188d0eSMatt Porter 1004eb188d0eSMatt Porter return 0; 1005eb188d0eSMatt Porter } 1006eb188d0eSMatt Porter 1007eb188d0eSMatt Porter /** 1008eb188d0eSMatt Porter * rio_mport_is_active- Tests if master port link is active 1009eb188d0eSMatt Porter * @port: Master port to test 1010eb188d0eSMatt Porter * 1011eb188d0eSMatt Porter * Reads the port error status CSR for the master port to 1012eb188d0eSMatt Porter * determine if the port has an active link. Returns 1013e5cabeb3SAlexandre Bounine * %RIO_PORT_N_ERR_STS_PORT_OK if the master port is active 1014eb188d0eSMatt Porter * or %0 if it is inactive. 1015eb188d0eSMatt Porter */ 1016eb188d0eSMatt Porter static int rio_mport_is_active(struct rio_mport *port) 1017eb188d0eSMatt Porter { 1018eb188d0eSMatt Porter u32 result = 0; 1019eb188d0eSMatt Porter u32 ext_ftr_ptr; 1020eb188d0eSMatt Porter int *entry = rio_mport_phys_table; 1021eb188d0eSMatt Porter 1022eb188d0eSMatt Porter do { 1023eb188d0eSMatt Porter if ((ext_ftr_ptr = 1024eb188d0eSMatt Porter rio_mport_get_feature(port, 1, 0, 0, *entry))) 1025eb188d0eSMatt Porter break; 1026eb188d0eSMatt Porter } while (*++entry >= 0); 1027eb188d0eSMatt Porter 1028eb188d0eSMatt Porter if (ext_ftr_ptr) 1029eb188d0eSMatt Porter rio_local_read_config_32(port, 1030eb188d0eSMatt Porter ext_ftr_ptr + 1031eb188d0eSMatt Porter RIO_PORT_N_ERR_STS_CSR(port->index), 1032eb188d0eSMatt Porter &result); 1033eb188d0eSMatt Porter 1034e5cabeb3SAlexandre Bounine return result & RIO_PORT_N_ERR_STS_PORT_OK; 1035eb188d0eSMatt Porter } 1036eb188d0eSMatt Porter 1037eb188d0eSMatt Porter /** 1038eb188d0eSMatt Porter * rio_alloc_net- Allocate and configure a new RIO network 1039eb188d0eSMatt Porter * @port: Master port associated with the RIO network 1040eb188d0eSMatt Porter * 1041eb188d0eSMatt Porter * Allocates a RIO network structure, initializes per-network 1042eb188d0eSMatt Porter * list heads, and adds the associated master port to the 1043eb188d0eSMatt Porter * network list of associated master ports. Returns a 1044eb188d0eSMatt Porter * RIO network pointer on success or %NULL on failure. 1045eb188d0eSMatt Porter */ 1046eb188d0eSMatt Porter static struct rio_net __devinit *rio_alloc_net(struct rio_mport *port) 1047eb188d0eSMatt Porter { 1048eb188d0eSMatt Porter struct rio_net *net; 1049eb188d0eSMatt Porter 1050dd00cc48SYoann Padioleau net = kzalloc(sizeof(struct rio_net), GFP_KERNEL); 1051eb188d0eSMatt Porter if (net) { 1052eb188d0eSMatt Porter INIT_LIST_HEAD(&net->node); 1053eb188d0eSMatt Porter INIT_LIST_HEAD(&net->devices); 1054eb188d0eSMatt Porter INIT_LIST_HEAD(&net->mports); 1055eb188d0eSMatt Porter list_add_tail(&port->nnode, &net->mports); 1056eb188d0eSMatt Porter net->hport = port; 1057eb188d0eSMatt Porter net->id = next_net++; 1058eb188d0eSMatt Porter } 1059eb188d0eSMatt Porter return net; 1060eb188d0eSMatt Porter } 1061eb188d0eSMatt Porter 1062eb188d0eSMatt Porter /** 1063c70555b0SAlexandre Bounine * rio_update_route_tables- Updates route tables in switches 1064c70555b0SAlexandre Bounine * @port: Master port associated with the RIO network 1065c70555b0SAlexandre Bounine * 1066c70555b0SAlexandre Bounine * For each enumerated device, ensure that each switch in a system 1067c70555b0SAlexandre Bounine * has correct routing entries. Add routes for devices that where 1068c70555b0SAlexandre Bounine * unknown dirung the first enumeration pass through the switch. 1069c70555b0SAlexandre Bounine */ 1070c70555b0SAlexandre Bounine static void rio_update_route_tables(struct rio_mport *port) 1071c70555b0SAlexandre Bounine { 1072c70555b0SAlexandre Bounine struct rio_dev *rdev; 1073c70555b0SAlexandre Bounine struct rio_switch *rswitch; 1074c70555b0SAlexandre Bounine u8 sport; 1075c70555b0SAlexandre Bounine u16 destid; 1076c70555b0SAlexandre Bounine 1077c70555b0SAlexandre Bounine list_for_each_entry(rdev, &rio_devices, global_list) { 1078c70555b0SAlexandre Bounine 1079c70555b0SAlexandre Bounine destid = (rio_is_switch(rdev))?rdev->rswitch->destid:rdev->destid; 1080c70555b0SAlexandre Bounine 1081c70555b0SAlexandre Bounine list_for_each_entry(rswitch, &rio_switches, node) { 1082c70555b0SAlexandre Bounine 1083c70555b0SAlexandre Bounine if (rio_is_switch(rdev) && (rdev->rswitch == rswitch)) 1084c70555b0SAlexandre Bounine continue; 1085c70555b0SAlexandre Bounine 1086c70555b0SAlexandre Bounine if (RIO_INVALID_ROUTE == rswitch->route_table[destid]) { 108707590ff0SAlexandre Bounine /* Skip if destid ends in empty switch*/ 108807590ff0SAlexandre Bounine if (rswitch->destid == destid) 108907590ff0SAlexandre Bounine continue; 1090c70555b0SAlexandre Bounine 1091ae05cbd5SAlexandre Bounine sport = RIO_GET_PORT_NUM(rswitch->rdev->swpinfo); 1092c70555b0SAlexandre Bounine 1093c70555b0SAlexandre Bounine if (rswitch->add_entry) { 1094818a04a0SAlexandre Bounine rio_route_add_entry(port, rswitch, 1095818a04a0SAlexandre Bounine RIO_GLOBAL_TABLE, destid, 1096818a04a0SAlexandre Bounine sport, 0); 1097c70555b0SAlexandre Bounine rswitch->route_table[destid] = sport; 1098c70555b0SAlexandre Bounine } 1099c70555b0SAlexandre Bounine } 1100c70555b0SAlexandre Bounine } 1101c70555b0SAlexandre Bounine } 1102c70555b0SAlexandre Bounine } 1103c70555b0SAlexandre Bounine 1104c70555b0SAlexandre Bounine /** 1105e5cabeb3SAlexandre Bounine * rio_init_em - Initializes RIO Error Management (for switches) 110697ef6f74SRandy Dunlap * @rdev: RIO device 1107e5cabeb3SAlexandre Bounine * 1108e5cabeb3SAlexandre Bounine * For each enumerated switch, call device-specific error management 1109e5cabeb3SAlexandre Bounine * initialization routine (if supplied by the switch driver). 1110e5cabeb3SAlexandre Bounine */ 1111e5cabeb3SAlexandre Bounine static void rio_init_em(struct rio_dev *rdev) 1112e5cabeb3SAlexandre Bounine { 1113e5cabeb3SAlexandre Bounine if (rio_is_switch(rdev) && (rdev->em_efptr) && 1114e5cabeb3SAlexandre Bounine (rdev->rswitch->em_init)) { 1115e5cabeb3SAlexandre Bounine rdev->rswitch->em_init(rdev); 1116e5cabeb3SAlexandre Bounine } 1117e5cabeb3SAlexandre Bounine } 1118e5cabeb3SAlexandre Bounine 1119e5cabeb3SAlexandre Bounine /** 1120e5cabeb3SAlexandre Bounine * rio_pw_enable - Enables/disables port-write handling by a master port 1121e5cabeb3SAlexandre Bounine * @port: Master port associated with port-write handling 1122e5cabeb3SAlexandre Bounine * @enable: 1=enable, 0=disable 1123e5cabeb3SAlexandre Bounine */ 1124e5cabeb3SAlexandre Bounine static void rio_pw_enable(struct rio_mport *port, int enable) 1125e5cabeb3SAlexandre Bounine { 1126e5cabeb3SAlexandre Bounine if (port->ops->pwenable) 1127e5cabeb3SAlexandre Bounine port->ops->pwenable(port, enable); 1128e5cabeb3SAlexandre Bounine } 1129e5cabeb3SAlexandre Bounine 1130e5cabeb3SAlexandre Bounine /** 1131eb188d0eSMatt Porter * rio_enum_mport- Start enumeration through a master port 1132eb188d0eSMatt Porter * @mport: Master port to send transactions 1133eb188d0eSMatt Porter * 1134eb188d0eSMatt Porter * Starts the enumeration process. If somebody has enumerated our 1135eb188d0eSMatt Porter * master port device, then give up. If not and we have an active 1136eb188d0eSMatt Porter * link, then start recursive peer enumeration. Returns %0 if 1137eb188d0eSMatt Porter * enumeration succeeds or %-EBUSY if enumeration fails. 1138eb188d0eSMatt Porter */ 113937d33d15SAl Viro int __devinit rio_enum_mport(struct rio_mport *mport) 1140eb188d0eSMatt Porter { 1141eb188d0eSMatt Porter struct rio_net *net = NULL; 1142eb188d0eSMatt Porter int rc = 0; 1143eb188d0eSMatt Porter 1144eb188d0eSMatt Porter printk(KERN_INFO "RIO: enumerate master port %d, %s\n", mport->id, 1145eb188d0eSMatt Porter mport->name); 1146eb188d0eSMatt Porter /* If somebody else enumerated our master port device, bail. */ 1147eb188d0eSMatt Porter if (rio_enum_host(mport) < 0) { 1148eb188d0eSMatt Porter printk(KERN_INFO 1149eb188d0eSMatt Porter "RIO: master port %d device has been enumerated by a remote host\n", 1150eb188d0eSMatt Porter mport->id); 1151eb188d0eSMatt Porter rc = -EBUSY; 1152eb188d0eSMatt Porter goto out; 1153eb188d0eSMatt Porter } 1154eb188d0eSMatt Porter 1155eb188d0eSMatt Porter /* If master port has an active link, allocate net and enum peers */ 1156eb188d0eSMatt Porter if (rio_mport_is_active(mport)) { 1157eb188d0eSMatt Porter if (!(net = rio_alloc_net(mport))) { 1158eb188d0eSMatt Porter printk(KERN_ERR "RIO: failed to allocate new net\n"); 1159eb188d0eSMatt Porter rc = -ENOMEM; 1160eb188d0eSMatt Porter goto out; 1161eb188d0eSMatt Porter } 1162933af4a6SThomas Moll 1163933af4a6SThomas Moll /* Enable Input Output Port (transmitter reviever) */ 1164933af4a6SThomas Moll rio_enable_rx_tx_port(mport, 1, 0, 0, 0); 1165933af4a6SThomas Moll 1166af84ca38SAlexandre Bounine /* Set component tag for host */ 1167af84ca38SAlexandre Bounine rio_local_write_config_32(mport, RIO_COMPONENT_TAG_CSR, 1168af84ca38SAlexandre Bounine next_comptag++); 1169af84ca38SAlexandre Bounine 117068fe4df5SAlexandre Bounine if (rio_enum_peer(net, mport, 0, NULL, 0) < 0) { 1171eb188d0eSMatt Porter /* A higher priority host won enumeration, bail. */ 1172eb188d0eSMatt Porter printk(KERN_INFO 1173eb188d0eSMatt Porter "RIO: master port %d device has lost enumeration to a remote host\n", 1174eb188d0eSMatt Porter mport->id); 1175eb188d0eSMatt Porter rio_clear_locks(mport); 1176eb188d0eSMatt Porter rc = -EBUSY; 1177eb188d0eSMatt Porter goto out; 1178eb188d0eSMatt Porter } 1179c70555b0SAlexandre Bounine rio_update_route_tables(mport); 1180eb188d0eSMatt Porter rio_clear_locks(mport); 1181e5cabeb3SAlexandre Bounine rio_pw_enable(mport, 1); 1182eb188d0eSMatt Porter } else { 1183eb188d0eSMatt Porter printk(KERN_INFO "RIO: master port %d link inactive\n", 1184eb188d0eSMatt Porter mport->id); 1185eb188d0eSMatt Porter rc = -EINVAL; 1186eb188d0eSMatt Porter } 1187eb188d0eSMatt Porter 1188eb188d0eSMatt Porter out: 1189eb188d0eSMatt Porter return rc; 1190eb188d0eSMatt Porter } 1191eb188d0eSMatt Porter 1192eb188d0eSMatt Porter /** 1193eb188d0eSMatt Porter * rio_build_route_tables- Generate route tables from switch route entries 1194eb188d0eSMatt Porter * 1195eb188d0eSMatt Porter * For each switch device, generate a route table by copying existing 1196eb188d0eSMatt Porter * route entries from the switch. 1197eb188d0eSMatt Porter */ 1198eb188d0eSMatt Porter static void rio_build_route_tables(void) 1199eb188d0eSMatt Porter { 1200eb188d0eSMatt Porter struct rio_dev *rdev; 1201eb188d0eSMatt Porter int i; 1202eb188d0eSMatt Porter u8 sport; 1203eb188d0eSMatt Porter 1204eb188d0eSMatt Porter list_for_each_entry(rdev, &rio_devices, global_list) 1205818a04a0SAlexandre Bounine if (rio_is_switch(rdev)) { 1206818a04a0SAlexandre Bounine rio_lock_device(rdev->net->hport, rdev->rswitch->destid, 1207818a04a0SAlexandre Bounine rdev->rswitch->hopcount, 1000); 1208e0423236SZhang Wei for (i = 0; 1209e0423236SZhang Wei i < RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size); 1210e0423236SZhang Wei i++) { 1211eb188d0eSMatt Porter if (rio_route_get_entry 1212818a04a0SAlexandre Bounine (rdev->net->hport, rdev->rswitch, 1213818a04a0SAlexandre Bounine RIO_GLOBAL_TABLE, i, &sport, 0) < 0) 1214eb188d0eSMatt Porter continue; 1215eb188d0eSMatt Porter rdev->rswitch->route_table[i] = sport; 1216eb188d0eSMatt Porter } 1217818a04a0SAlexandre Bounine 1218818a04a0SAlexandre Bounine rio_unlock_device(rdev->net->hport, 1219818a04a0SAlexandre Bounine rdev->rswitch->destid, 1220818a04a0SAlexandre Bounine rdev->rswitch->hopcount); 1221818a04a0SAlexandre Bounine } 1222eb188d0eSMatt Porter } 1223eb188d0eSMatt Porter 1224eb188d0eSMatt Porter /** 1225eb188d0eSMatt Porter * rio_enum_timeout- Signal that enumeration timed out 1226eb188d0eSMatt Porter * @data: Address of timeout flag. 1227eb188d0eSMatt Porter * 1228eb188d0eSMatt Porter * When the enumeration complete timer expires, set a flag that 1229eb188d0eSMatt Porter * signals to the discovery process that enumeration did not 1230eb188d0eSMatt Porter * complete in a sane amount of time. 1231eb188d0eSMatt Porter */ 1232eb188d0eSMatt Porter static void rio_enum_timeout(unsigned long data) 1233eb188d0eSMatt Porter { 1234eb188d0eSMatt Porter /* Enumeration timed out, set flag */ 1235eb188d0eSMatt Porter *(int *)data = 1; 1236eb188d0eSMatt Porter } 1237eb188d0eSMatt Porter 1238eb188d0eSMatt Porter /** 1239eb188d0eSMatt Porter * rio_disc_mport- Start discovery through a master port 1240eb188d0eSMatt Porter * @mport: Master port to send transactions 1241eb188d0eSMatt Porter * 1242eb188d0eSMatt Porter * Starts the discovery process. If we have an active link, 1243eb188d0eSMatt Porter * then wait for the signal that enumeration is complete. 1244eb188d0eSMatt Porter * When enumeration completion is signaled, start recursive 1245eb188d0eSMatt Porter * peer discovery. Returns %0 if discovery succeeds or %-EBUSY 1246eb188d0eSMatt Porter * on failure. 1247eb188d0eSMatt Porter */ 124837d33d15SAl Viro int __devinit rio_disc_mport(struct rio_mport *mport) 1249eb188d0eSMatt Porter { 1250eb188d0eSMatt Porter struct rio_net *net = NULL; 1251eb188d0eSMatt Porter int enum_timeout_flag = 0; 1252eb188d0eSMatt Porter 1253eb188d0eSMatt Porter printk(KERN_INFO "RIO: discover master port %d, %s\n", mport->id, 1254eb188d0eSMatt Porter mport->name); 1255eb188d0eSMatt Porter 1256eb188d0eSMatt Porter /* If master port has an active link, allocate net and discover peers */ 1257eb188d0eSMatt Porter if (rio_mport_is_active(mport)) { 1258eb188d0eSMatt Porter if (!(net = rio_alloc_net(mport))) { 1259eb188d0eSMatt Porter printk(KERN_ERR "RIO: Failed to allocate new net\n"); 1260eb188d0eSMatt Porter goto bail; 1261eb188d0eSMatt Porter } 1262eb188d0eSMatt Porter 1263eb188d0eSMatt Porter pr_debug("RIO: wait for enumeration complete..."); 1264eb188d0eSMatt Porter 1265eb188d0eSMatt Porter rio_enum_timer.expires = 1266eb188d0eSMatt Porter jiffies + CONFIG_RAPIDIO_DISC_TIMEOUT * HZ; 1267eb188d0eSMatt Porter rio_enum_timer.data = (unsigned long)&enum_timeout_flag; 1268eb188d0eSMatt Porter add_timer(&rio_enum_timer); 1269eb188d0eSMatt Porter while (!rio_enum_complete(mport)) { 1270eb188d0eSMatt Porter mdelay(1); 1271eb188d0eSMatt Porter if (enum_timeout_flag) { 1272eb188d0eSMatt Porter del_timer_sync(&rio_enum_timer); 1273eb188d0eSMatt Porter goto timeout; 1274eb188d0eSMatt Porter } 1275eb188d0eSMatt Porter } 1276eb188d0eSMatt Porter del_timer_sync(&rio_enum_timer); 1277eb188d0eSMatt Porter 1278eb188d0eSMatt Porter pr_debug("done\n"); 1279818a04a0SAlexandre Bounine 1280818a04a0SAlexandre Bounine /* Read DestID assigned by enumerator */ 1281818a04a0SAlexandre Bounine rio_local_read_config_32(mport, RIO_DID_CSR, 1282818a04a0SAlexandre Bounine &mport->host_deviceid); 1283818a04a0SAlexandre Bounine mport->host_deviceid = RIO_GET_DID(mport->sys_size, 1284818a04a0SAlexandre Bounine mport->host_deviceid); 1285818a04a0SAlexandre Bounine 1286e0423236SZhang Wei if (rio_disc_peer(net, mport, RIO_ANY_DESTID(mport->sys_size), 1287e0423236SZhang Wei 0) < 0) { 1288eb188d0eSMatt Porter printk(KERN_INFO 1289eb188d0eSMatt Porter "RIO: master port %d device has failed discovery\n", 1290eb188d0eSMatt Porter mport->id); 1291eb188d0eSMatt Porter goto bail; 1292eb188d0eSMatt Porter } 1293eb188d0eSMatt Porter 1294eb188d0eSMatt Porter rio_build_route_tables(); 1295eb188d0eSMatt Porter } 1296eb188d0eSMatt Porter 1297eb188d0eSMatt Porter return 0; 1298eb188d0eSMatt Porter 1299eb188d0eSMatt Porter timeout: 1300eb188d0eSMatt Porter pr_debug("timeout\n"); 1301eb188d0eSMatt Porter bail: 1302eb188d0eSMatt Porter return -EBUSY; 1303eb188d0eSMatt Porter } 1304