litmus-rt.git - The LITMUS^RT kernel.

diff options

Diffstat (limited to 'fs/btrfs/disk-io.c')

-rw-r--r--

1 files changed, 1 insertions, 11 deletions

 static void end_workqueue_fn(struct btrfs_work *work);
 static void free_fs_root(struct btrfs_root *root);
-static atomic_t btrfs_bdi_num = ATOMIC_INIT(0);
 /*
  * end_io_wq structs are used to do processing in task context when an IO is
  * complete.  This is used during reads to verify checksums, and it is used
 {
         int err;
-        bdi->name = "btrfs";
         bdi->capabilities = BDI_CAP_MAP_COPY;
-        err = bdi_init(bdi);
+        err = bdi_setup_and_register(bdi, "btrfs", BDI_CAP_MAP_COPY);
         if (err)
                 return err;
-        err = bdi_register(bdi, NULL, "btrfs-%d",
-                                atomic_inc_return(&btrfs_bdi_num));
-        if (err) {
-                bdi_destroy(bdi);
-                return err;
-        }
         bdi->ra_pages   = default_backing_dev_info.ra_pages;
         bdi->unplug_io_fn       = btrfs_unplug_io_fn;
         bdi->unplug_io_data     = info;

/* * RapidIO enumeration and discovery support * * Copyright 2005 MontaVista Software, Inc. * Matt Porter <mporter@kernel.crashing.org> * * Copyright 2009 Integrated Device Technology, Inc. * Alex Bounine <alexandre.bounine@idt.com> * - Added Port-Write/Error Management initialization and handling * * Copyright 2009 Sysgo AG * Thomas Moll <thomas.moll@sysgo.com> * - Added Input- Output- enable functionality, to allow full communication * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. */ #include <linux/types.h> #include <linux/kernel.h> #include <linux/delay.h> #include <linux/dma-mapping.h> #include <linux/init.h> #include <linux/rio.h> #include <linux/rio_drv.h> #include <linux/rio_ids.h> #include <linux/rio_regs.h> #include <linux/module.h> #include <linux/spinlock.h> #include <linux/timer.h> #include <linux/sched.h> #include <linux/jiffies.h> #include <linux/slab.h> #include "rio.h" static void rio_init_em(struct rio_dev *rdev); struct rio_id_table { u16 start; /* logical minimal id */ u32 max; /* max number of IDs in table */ spinlock_t lock; unsigned long table[0]; }; static int next_destid = 0; static int next_comptag = 1; /** * rio_destid_alloc - Allocate next available destID for given network * @net: RIO network * * Returns next available device destination ID for the specified RIO network. * Marks allocated ID as one in use. * Returns RIO_INVALID_DESTID if new destID is not available. */ static u16 rio_destid_alloc(struct rio_net *net) { int destid; struct rio_id_table *idtab = (struct rio_id_table *)net->enum_data; spin_lock(&idtab->lock); destid = find_first_zero_bit(idtab->table, idtab->max); if (destid < idtab->max) { set_bit(destid, idtab->table); destid += idtab->start; } else destid = RIO_INVALID_DESTID; spin_unlock(&idtab->lock); return (u16)destid; } /** * rio_destid_reserve - Reserve the specivied destID * @net: RIO network * @destid: destID to reserve * * Tries to reserve the specified destID. * Returns 0 if successful. */ static int rio_destid_reserve(struct rio_net *net, u16 destid) { int oldbit; struct rio_id_table *idtab = (struct rio_id_table *)net->enum_data; destid -= idtab->start; spin_lock(&idtab->lock); oldbit = test_and_set_bit(destid, idtab->table); spin_unlock(&idtab->lock); return oldbit; } /** * rio_destid_free - free a previously allocated destID * @net: RIO network * @destid: destID to free * * Makes the specified destID available for use. */ static void rio_destid_free(struct rio_net *net, u16 destid) { struct rio_id_table *idtab = (struct rio_id_table *)net->enum_data; destid -= idtab->start; spin_lock(&idtab->lock); clear_bit(destid, idtab->table); spin_unlock(&idtab->lock); } /** * rio_destid_first - return first destID in use * @net: RIO network */ static u16 rio_destid_first(struct rio_net *net) { int destid; struct rio_id_table *idtab = (struct rio_id_table *)net->enum_data; spin_lock(&idtab->lock); destid = find_first_bit(idtab->table, idtab->max); if (destid >= idtab->max) destid = RIO_INVALID_DESTID; else destid += idtab->start; spin_unlock(&idtab->lock); return (u16)destid; } /** * rio_destid_next - return next destID in use * @net: RIO network * @from: destination ID from which search shall continue */ static u16 rio_destid_next(struct rio_net *net, u16 from) { int destid; struct rio_id_table *idtab = (struct rio_id_table *)net->enum_data; spin_lock(&idtab->lock); destid = find_next_bit(idtab->table, idtab->max, from); if (destid >= idtab->max) destid = RIO_INVALID_DESTID; else destid += idtab->start; spin_unlock(&idtab->lock); return (u16)destid; } /** * rio_get_device_id - Get the base/extended device id for a device * @port: RIO master port * @destid: Destination ID of device * @hopcount: Hopcount to device * * Reads the base/extended device id from a device. Returns the * 8/16-bit device ID. */ static u16 rio_get_device_id(struct rio_mport *port, u16 destid, u8 hopcount) { u32 result; rio_mport_read_config_32(port, destid, hopcount, RIO_DID_CSR, &result); return RIO_GET_DID(port->sys_size, result); } /** * rio_set_device_id - Set the base/extended device id for a device * @port: RIO master port * @destid: Destination ID of device * @hopcount: Hopcount to device * @did: Device ID value to be written * * Writes the base/extended device id from a device. */ static void rio_set_device_id(struct rio_mport *port, u16 destid, u8 hopcount, u16 did) { rio_mport_write_config_32(port, destid, hopcount, RIO_DID_CSR, RIO_SET_DID(port->sys_size, did)); } /** * rio_clear_locks- Release all host locks and signal enumeration complete * @net: RIO network to run on * * Marks the component tag CSR on each device with the enumeration * complete flag. When complete, it then release the host locks on * each device. Returns 0 on success or %-EINVAL on failure. */ static int rio_clear_locks(struct rio_net *net) { struct rio_mport *port = net->hport; struct rio_dev *rdev; u32 result; int ret = 0; /* Release host device id locks */ rio_local_write_config_32(port, RIO_HOST_DID_LOCK_CSR, port->host_deviceid); rio_local_read_config_32(port, RIO_HOST_DID_LOCK_CSR, &result); if ((result & 0xffff) != 0xffff) { printk(KERN_INFO "RIO: badness when releasing host lock on master port, result %8.8x\n", result); ret = -EINVAL; } list_for_each_entry(rdev, &net->devices, net_list) { rio_write_config_32(rdev, RIO_HOST_DID_LOCK_CSR, port->host_deviceid); rio_read_config_32(rdev, RIO_HOST_DID_LOCK_CSR, &result); if ((result & 0xffff) != 0xffff) { printk(KERN_INFO "RIO: badness when releasing host lock on vid %4.4x did %4.4x\n", rdev->vid, rdev->did); ret = -EINVAL; } /* Mark device as discovered and enable master */ rio_read_config_32(rdev, rdev->phys_efptr + RIO_PORT_GEN_CTL_CSR, &result); result |= RIO_PORT_GEN_DISCOVERED | RIO_PORT_GEN_MASTER; rio_write_config_32(rdev, rdev->phys_efptr + RIO_PORT_GEN_CTL_CSR, result); } return ret; } /** * rio_enum_host- Set host lock and initialize host destination ID * @port: Master port to issue transaction * * Sets the local host master port lock and destination ID register * with the host device ID value. The host device ID value is provided * by the platform. Returns %0 on success or %-1 on failure. */ static int rio_enum_host(struct rio_mport *port) { u32 result; /* Set master port host device id lock */ rio_local_write_config_32(port, RIO_HOST_DID_LOCK_CSR, port->host_deviceid); rio_local_read_config_32(port, RIO_HOST_DID_LOCK_CSR, &result); if ((result & 0xffff) != port->host_deviceid) return -1; /* Set master port destid and init destid ctr */ rio_local_set_device_id(port, port->host_deviceid); return 0; } /** * rio_device_has_destid- Test if a device contains a destination ID register * @port: Master port to issue transaction * @src_ops: RIO device source operations * @dst_ops: RIO device destination operations * * Checks the provided @src_ops and @dst_ops for the necessary transaction * capabilities that indicate whether or not a device will implement a * destination ID register. Returns 1 if true or 0 if false. */ static int rio_device_has_destid(struct rio_mport *port, int src_ops, int dst_ops) { u32 mask = RIO_OPS_READ | RIO_OPS_WRITE | RIO_OPS_ATOMIC_TST_SWP | RIO_OPS_ATOMIC_INC | RIO_OPS_ATOMIC_DEC | RIO_OPS_ATOMIC_SET | RIO_OPS_ATOMIC_CLR; return !!((src_ops | dst_ops) & mask); } /** * rio_release_dev- Frees a RIO device struct * @dev: LDM device associated with a RIO device struct * * Gets the RIO device struct associated a RIO device struct. * The RIO device struct is freed. */ static void rio_release_dev(struct device *dev) { struct rio_dev *rdev; rdev = to_rio_dev(dev); kfree(rdev); } /** * rio_is_switch- Tests if a RIO device has switch capabilities * @rdev: RIO device * * Gets the RIO device Processing Element Features register * contents and tests for switch capabilities. Returns 1 if * the device is a switch or 0 if it is not a switch. * The RIO device struct is freed. */ static int rio_is_switch(struct rio_dev *rdev) { if (rdev->pef & RIO_PEF_SWITCH) return 1; return 0; } /** * rio_setup_device- Allocates and sets up a RIO device * @net: RIO network * @port: Master port to send transactions * @destid: Current destination ID * @hopcount: Current hopcount * @do_enum: Enumeration/Discovery mode flag * * Allocates a RIO device and configures fields based on configuration * space contents. If device has a destination ID register, a destination * ID is either assigned in enumeration mode or read from configuration * space in discovery mode. If the device has switch capabilities, then * a switch is allocated and configured appropriately. Returns a pointer * to a RIO device on success or NULL on failure. * */ static struct rio_dev *rio_setup_device(struct rio_net *net, struct rio_mport *port, u16 destid, u8 hopcount, int do_enum) { int ret = 0; struct rio_dev *rdev; struct rio_switch *rswitch = NULL; int result, rdid; size_t size; u32 swpinfo = 0; size = sizeof(struct rio_dev); if (rio_mport_read_config_32(port, destid, hopcount, RIO_PEF_CAR, &result)) return NULL; if (result & (RIO_PEF_SWITCH | RIO_PEF_MULTIPORT)) { rio_mport_read_config_32(port, destid, hopcount, RIO_SWP_INFO_CAR, &swpinfo); if (result & RIO_PEF_SWITCH) { size += (RIO_GET_TOTAL_PORTS(swpinfo) * sizeof(rswitch->nextdev[0])) + sizeof(*rswitch); } } rdev = kzalloc(size, GFP_KERNEL); if (!rdev) return NULL; rdev->net = net; rdev->pef = result; rdev->swpinfo = swpinfo; rio_mport_read_config_32(port, destid, hopcount, RIO_DEV_ID_CAR, &result); rdev->did = result >> 16; rdev->vid = result & 0xffff; rio_mport_read_config_32(port, destid, hopcount, RIO_DEV_INFO_CAR, &rdev->device_rev); rio_mport_read_config_32(port, destid, hopcount, RIO_ASM_ID_CAR, &result); rdev->asm_did = result >> 16; rdev->asm_vid = result & 0xffff; rio_mport_read_config_32(port, destid, hopcount, RIO_ASM_INFO_CAR, &result); rdev->asm_rev = result >> 16; if (rdev->pef & RIO_PEF_EXT_FEATURES) { rdev->efptr = result & 0xffff; rdev->phys_efptr = rio_mport_get_physefb(port, 0, destid, hopcount, &rdev->phys_rmap); pr_debug("RIO: %s Register Map %d device\n", __func__, rdev->phys_rmap); rdev->em_efptr = rio_mport_get_feature(port, 0, destid, hopcount, RIO_EFB_ERR_MGMNT); if (!rdev->em_efptr) rdev->em_efptr = rio_mport_get_feature(port, 0, destid, hopcount, RIO_EFB_ERR_MGMNT_HS); } rio_mport_read_config_32(port, destid, hopcount, RIO_SRC_OPS_CAR, &rdev->src_ops); rio_mport_read_config_32(port, destid, hopcount, RIO_DST_OPS_CAR, &rdev->dst_ops); if (do_enum) { /* Assign component tag to device */ if (next_comptag >= 0x10000) { pr_err("RIO: Component Tag Counter Overflow\n"); goto cleanup; } rio_mport_write_config_32(port, destid, hopcount, RIO_COMPONENT_TAG_CSR, next_comptag); rdev->comp_tag = next_comptag++; rdev->do_enum = true; } else { rio_mport_read_config_32(port, destid, hopcount, RIO_COMPONENT_TAG_CSR, &rdev->comp_tag); } if (rio_device_has_destid(port, rdev->src_ops, rdev->dst_ops)) { if (do_enum) { rio_set_device_id(port, destid, hopcount, next_destid); rdev->destid = next_destid; next_destid = rio_destid_alloc(net); } else rdev->destid = rio_get_device_id(port, destid, hopcount); rdev->hopcount = 0xff; } else { /* Switch device has an associated destID which * will be adjusted later */ rdev->destid = destid; rdev->hopcount = hopcount; } /* If a PE has both switch and other functions, show it as a switch */ if (rio_is_switch(rdev)) { rswitch = rdev->rswitch; rswitch->port_ok = 0; spin_lock_init(&rswitch->lock); rswitch->route_table = kzalloc(sizeof(u8)* RIO_MAX_ROUTE_ENTRIES(port->sys_size), GFP_KERNEL); if (!rswitch->route_table) goto cleanup; /* Initialize switch route table */ for (rdid = 0; rdid < RIO_MAX_ROUTE_ENTRIES(port->sys_size); rdid++) rswitch->route_table[rdid] = RIO_INVALID_ROUTE; dev_set_name(&rdev->dev, "%02x:s:%04x", rdev->net->id, rdev->comp_tag & RIO_CTAG_UDEVID); if (do_enum) rio_route_clr_table(rdev, RIO_GLOBAL_TABLE, 0); } else { if (do_enum) /*Enable Input Output Port (transmitter receiver)*/ rio_enable_rx_tx_port(port, 0, destid, hopcount, 0); dev_set_name(&rdev->dev, "%02x:e:%04x", rdev->net->id, rdev->comp_tag & RIO_CTAG_UDEVID); } rdev->dev.parent = &net->dev; rio_attach_device(rdev); rdev->dev.release = rio_release_dev; rdev->dma_mask = DMA_BIT_MASK(32); rdev->dev.dma_mask = &rdev->dma_mask; rdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); if (rdev->dst_ops & RIO_DST_OPS_DOORBELL) rio_init_dbell_res(&rdev->riores[RIO_DOORBELL_RESOURCE], 0, 0xffff); ret = rio_add_device(rdev); if (ret) goto cleanup; rio_dev_get(rdev); return rdev; cleanup: if (rswitch) kfree(rswitch->route_table); kfree(rdev); return NULL; } /** * rio_sport_is_active- Tests if a switch port has an active connection. * @rdev: RapidIO device object * @sp: Switch port number * * Reads the port error status CSR for a particular switch port to * determine if the port has an active link. Returns * %RIO_PORT_N_ERR_STS_PORT_OK if the port is active or %0 if it is * inactive. */ static int rio_sport_is_active(struct rio_dev *rdev, int sp) { u32 result = 0; rio_read_config_32(rdev, RIO_DEV_PORT_N_ERR_STS_CSR(rdev, sp), &result); return result & RIO_PORT_N_ERR_STS_PORT_OK; } /** * rio_get_host_deviceid_lock- Reads the Host Device ID Lock CSR on a device * @port: Master port to send transaction * @hopcount: Number of hops to the device * * Used during enumeration to read the Host Device ID Lock CSR on a * RIO device. Returns the value of the lock register. */ static u16 rio_get_host_deviceid_lock(struct rio_mport *port, u8 hopcount) { u32 result; rio_mport_read_config_32(port, RIO_ANY_DESTID(port->sys_size), hopcount, RIO_HOST_DID_LOCK_CSR, &result); return (u16) (result & 0xffff); } /** * rio_enum_peer- Recursively enumerate a RIO network through a master port * @net: RIO network being enumerated * @port: Master port to send transactions * @hopcount: Number of hops into the network * @prev: Previous RIO device connected to the enumerated one * @prev_port: Port on previous RIO device * * Recursively enumerates a RIO network. Transactions are sent via the * master port passed in @port. */ static int rio_enum_peer(struct rio_net *net, struct rio_mport *port, u8 hopcount, struct rio_dev *prev, int prev_port) { struct rio_dev *rdev; u32 regval; int tmp; if (rio_mport_chk_dev_access(port, RIO_ANY_DESTID(port->sys_size), hopcount)) { pr_debug("RIO: device access check failed\n"); return -1; } if (rio_get_host_deviceid_lock(port, hopcount) == port->host_deviceid) { pr_debug("RIO: PE already discovered by this host\n"); /* * Already discovered by this host. Add it as another * link to the existing device. */ rio_mport_read_config_32(port, RIO_ANY_DESTID(port->sys_size), hopcount, RIO_COMPONENT_TAG_CSR, &regval); if (regval) { rdev = rio_get_comptag((regval & 0xffff), NULL); if (rdev && prev && rio_is_switch(prev)) { pr_debug("RIO: redundant path to %s\n", rio_name(rdev)); prev->rswitch->nextdev[prev_port] = rdev; } } return 0; } /* Attempt to acquire device lock */ rio_mport_write_config_32(port, RIO_ANY_DESTID(port->sys_size), hopcount, RIO_HOST_DID_LOCK_CSR, port->host_deviceid); while ((tmp = rio_get_host_deviceid_lock(port, hopcount)) < port->host_deviceid) { /* Delay a bit */ mdelay(1); /* Attempt to acquire device lock again */ rio_mport_write_config_32(port, RIO_ANY_DESTID(port->sys_size), hopcount, RIO_HOST_DID_LOCK_CSR, port->host_deviceid); } if (rio_get_host_deviceid_lock(port, hopcount) > port->host_deviceid) { pr_debug( "RIO: PE locked by a higher priority host...retreating\n"); return -1; } /* Setup new RIO device */ rdev = rio_setup_device(net, port, RIO_ANY_DESTID(port->sys_size), hopcount, 1); if (rdev) { rdev->prev = prev; if (prev && rio_is_switch(prev)) prev->rswitch->nextdev[prev_port] = rdev; } else return -1; if (rio_is_switch(rdev)) { int sw_destid; int cur_destid; int sw_inport; u16 destid; int port_num; sw_inport = RIO_GET_PORT_NUM(rdev->swpinfo); rio_route_add_entry(rdev, RIO_GLOBAL_TABLE, port->host_deviceid, sw_inport, 0); rdev->rswitch->route_table[port->host_deviceid] = sw_inport; destid = rio_destid_first(net); while (destid != RIO_INVALID_DESTID && destid < next_destid) { if (destid != port->host_deviceid) { rio_route_add_entry(rdev, RIO_GLOBAL_TABLE, destid, sw_inport, 0); rdev->rswitch->route_table[destid] = sw_inport; } destid = rio_destid_next(net, destid + 1); } pr_debug( "RIO: found %s (vid %4.4x did %4.4x) with %d ports\n", rio_name(rdev), rdev->vid, rdev->did, RIO_GET_TOTAL_PORTS(rdev->swpinfo)); sw_destid = next_destid; for (port_num = 0; port_num < RIO_GET_TOTAL_PORTS(rdev->swpinfo); port_num++) { if (sw_inport == port_num) { rio_enable_rx_tx_port(port, 0, RIO_ANY_DESTID(port->sys_size), hopcount, port_num); rdev->rswitch->port_ok |= (1 << port_num); continue; } cur_destid = next_destid; if (rio_sport_is_active(rdev, port_num)) { pr_debug( "RIO: scanning device on port %d\n", port_num); rio_enable_rx_tx_port(port, 0, RIO_ANY_DESTID(port->sys_size), hopcount, port_num); rdev->rswitch->port_ok |= (1 << port_num); rio_route_add_entry(rdev, RIO_GLOBAL_TABLE, RIO_ANY_DESTID(port->sys_size), port_num, 0); if (rio_enum_peer(net, port, hopcount + 1, rdev, port_num) < 0) return -1; /* Update routing tables */ destid = rio_destid_next(net, cur_destid + 1); if (destid != RIO_INVALID_DESTID) { for (destid = cur_destid; destid < next_destid;) { if (destid != port->host_deviceid) { rio_route_add_entry(rdev, RIO_GLOBAL_TABLE, destid, port_num, 0); rdev->rswitch-> route_table[destid] = port_num; } destid = rio_destid_next(net, destid + 1); } } } else { /* If switch supports Error Management, * set PORT_LOCKOUT bit for unused port */ if (rdev->em_efptr) rio_set_port_lockout(rdev, port_num, 1); rdev->rswitch->port_ok &= ~(1 << port_num); } } /* Direct Port-write messages to the enumeratiing host */ if ((rdev->src_ops & RIO_SRC_OPS_PORT_WRITE) && (rdev->em_efptr)) { rio_write_config_32(rdev, rdev->em_efptr + RIO_EM_PW_TGT_DEVID, (port->host_deviceid << 16) | (port->sys_size << 15)); } rio_init_em(rdev); /* Check for empty switch */ if (next_destid == sw_destid) next_destid = rio_destid_alloc(net); rdev->destid = sw_destid; } else pr_debug("RIO: found %s (vid %4.4x did %4.4x)\n", rio_name(rdev), rdev->vid, rdev->did); return 0; } /** * rio_enum_complete- Tests if enumeration of a network is complete * @port: Master port to send transaction * * Tests the PGCCSR discovered bit for non-zero value (enumeration * complete flag). Return %1 if enumeration is complete or %0 if * enumeration is incomplete. */ static int rio_enum_complete(struct rio_mport *port) { u32 regval; rio_local_read_config_32(port, port->phys_efptr + RIO_PORT_GEN_CTL_CSR, &regval); return (regval & RIO_PORT_GEN_DISCOVERED) ? 1 : 0; } /** * rio_disc_peer- Recursively discovers a RIO network through a master port * @net: RIO network being discovered * @port: Master port to send transactions * @destid: Current destination ID in network * @hopcount: Number of hops into the network * @prev: previous rio_dev * @prev_port: previous port number * * Recursively discovers a RIO network. Transactions are sent via the * master port passed in @port. */ static int rio_disc_peer(struct rio_net *net, struct rio_mport *port, u16 destid, u8 hopcount, struct rio_dev *prev, int prev_port) { u8 port_num, route_port; struct rio_dev *rdev; u16 ndestid; /* Setup new RIO device */ if ((rdev = rio_setup_device(net, port, destid, hopcount, 0))) { rdev->prev = prev; if (prev && rio_is_switch(prev)) prev->rswitch->nextdev[prev_port] = rdev; } else return -1; if (rio_is_switch(rdev)) { /* Associated destid is how we accessed this switch */ rdev->destid = destid; pr_debug( "RIO: found %s (vid %4.4x did %4.4x) with %d ports\n", rio_name(rdev), rdev->vid, rdev->did, RIO_GET_TOTAL_PORTS(rdev->swpinfo)); for (port_num = 0; port_num < RIO_GET_TOTAL_PORTS(rdev->swpinfo); port_num++) { if (RIO_GET_PORT_NUM(rdev->swpinfo) == port_num) continue; if (rio_sport_is_active(rdev, port_num)) { pr_debug( "RIO: scanning device on port %d\n", port_num); rio_lock_device(port, destid, hopcount, 1000); for (ndestid = 0; ndestid < RIO_ANY_DESTID(port->sys_size); ndestid++) { rio_route_get_entry(rdev, RIO_GLOBAL_TABLE, ndestid, &route_port, 0); if (route_port == port_num) break; } if (ndestid == RIO_ANY_DESTID(port->sys_size)) continue; rio_unlock_device(port, destid, hopcount); if (rio_disc_peer(net, port, ndestid, hopcount + 1, rdev, port_num) < 0) return -1; } } } else pr_debug("RIO: found %s (vid %4.4x did %4.4x)\n", rio_name(rdev), rdev->vid, rdev->did); return 0; } /** * rio_mport_is_active- Tests if master port link is active * @port: Master port to test * * Reads the port error status CSR for the master port to * determine if the port has an active link. Returns * %RIO_PORT_N_ERR_STS_PORT_OK if the master port is active * or %0 if it is inactive. */ static int rio_mport_is_active(struct rio_mport *port) { u32 result = 0; rio_local_read_config_32(port, port->phys_efptr + RIO_PORT_N_ERR_STS_CSR(port->index, port->phys_rmap), &result); return result & RIO_PORT_N_ERR_STS_PORT_OK; } static void rio_scan_release_net(struct rio_net *net) { pr_debug("RIO-SCAN: %s: net_%d\n", __func__, net->id); kfree(net->enum_data); } static void rio_scan_release_dev(struct device *dev) { struct rio_net *net; net = to_rio_net(dev); pr_debug("RIO-SCAN: %s: net_%d\n", __func__, net->id); kfree(net); } /* * rio_scan_alloc_net - Allocate and configure a new RIO network * @mport: Master port associated with the RIO network * @do_enum: Enumeration/Discovery mode flag * @start: logical minimal start id for new net * * Allocates a new RIO network structure and initializes enumerator-specific * part of it (if required). * Returns a RIO network pointer on success or %NULL on failure. */ static struct rio_net *rio_scan_alloc_net(struct rio_mport *mport, int do_enum, u16 start) { struct rio_net *net; net = rio_alloc_net(mport); if (net && do_enum) { struct rio_id_table *idtab; size_t size; size = sizeof(struct rio_id_table) + BITS_TO_LONGS( RIO_MAX_ROUTE_ENTRIES(mport->sys_size) ) * sizeof(long); idtab = kzalloc(size, GFP_KERNEL); if (idtab == NULL) { pr_err("RIO: failed to allocate destID table\n"); rio_free_net(net); net = NULL; } else { net->enum_data = idtab; net->release = rio_scan_release_net; idtab->start = start; idtab->max = RIO_MAX_ROUTE_ENTRIES(mport->sys_size); spin_lock_init(&idtab->lock); } } if (net) { net->id = mport->id; net->hport = mport; dev_set_name(&net->dev, "rnet_%d", net->id); net->dev.parent = &mport->dev; net->dev.release = rio_scan_release_dev; rio_add_net(net); } return net; } /** * rio_update_route_tables- Updates route tables in switches * @net: RIO network to run update on * * For each enumerated device, ensure that each switch in a system * has correct routing entries. Add routes for devices that where * unknown dirung the first enumeration pass through the switch. */ static void rio_update_route_tables(struct rio_net *net) { struct rio_dev *rdev, *swrdev; struct rio_switch *rswitch; u8 sport; u16 destid; list_for_each_entry(rdev, &net->devices, net_list) { destid = rdev->destid; list_for_each_entry(rswitch, &net->switches, node) { if (rio_is_switch(rdev) && (rdev->rswitch == rswitch)) continue; if (RIO_INVALID_ROUTE == rswitch->route_table[destid]) { swrdev = sw_to_rio_dev(rswitch); /* Skip if destid ends in empty switch*/ if (swrdev->destid == destid) continue; sport = RIO_GET_PORT_NUM(swrdev->swpinfo); rio_route_add_entry(swrdev, RIO_GLOBAL_TABLE, destid, sport, 0); rswitch->route_table[destid] = sport; } } } } /** * rio_init_em - Initializes RIO Error Management (for switches) * @rdev: RIO device * * For each enumerated switch, call device-specific error management * initialization routine (if supplied by the switch driver). */ static void rio_init_em(struct rio_dev *rdev) { if (rio_is_switch(rdev) && (rdev->em_efptr) && rdev->rswitch->ops && rdev->rswitch->ops->em_init) { rdev->rswitch->ops->em_init(rdev); } } /** * rio_enum_mport- Start enumeration through a master port * @mport: Master port to send transactions * @flags: Enumeration control flags * * Starts the enumeration process. If somebody has enumerated our


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