rapidio: add Port-Write handling for EM

Add RapidIO Port-Write message handling in the context of Error
   Management Extensions Specification Rev.1.3.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Tested-by: Thomas Moll <thomas.moll@sysgo.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Li Yang <leoli@freescale.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

5 files changed, 665 insertions, 36 deletions

diff --git a/drivers/rapidio/rio-scan.c b/drivers/rapidio/rio-scan.c
index cbf0d5f4fba8..74633cc6b2eb 100644
--- a/drivers/rapidio/rio-scan.c
+++ b/drivers/rapidio/rio-scan.c
@@ -4,6 +4,10 @@
  * 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
+ *
  * 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
@@ -31,15 +35,16 @@
 LIST_HEAD(rio_devices);
 static LIST_HEAD(rio_switches);
 
-#define RIO_ENUM_CMPL_MAGIC     0xdeadbeef
-
 static void rio_enum_timeout(unsigned long);
 
+static void rio_init_em(struct rio_dev *rdev);
+
 DEFINE_SPINLOCK(rio_global_list_lock);
 
 static int next_destid = 0;
 static int next_switchid = 0;
 static int next_net = 0;
+static int next_comptag;
 
 static struct timer_list rio_enum_timer =
 TIMER_INITIALIZER(rio_enum_timeout, 0, 0);
@@ -52,13 +57,6 @@ static int rio_mport_phys_table[] = {
         -1,
 };
 
-static int rio_sport_phys_table[] = {
-        RIO_EFB_PAR_EP_FREE_ID,
-        RIO_EFB_SER_EP_FREE_ID,
-        RIO_EFB_SER_EP_FREC_ID,
-        -1,
-};
-
 /**
  * rio_get_device_id - Get the base/extended device id for a device
  * @port: RIO master port
@@ -119,12 +117,26 @@ static int rio_clear_locks(struct rio_mport *port)
         u32 result;
         int ret = 0;
 
-        /* Write component tag CSR magic complete value */
-        rio_local_write_config_32(port, RIO_COMPONENT_TAG_CSR,
-                                  RIO_ENUM_CMPL_MAGIC);
-        list_for_each_entry(rdev, &rio_devices, global_list)
-            rio_write_config_32(rdev, RIO_COMPONENT_TAG_CSR,
-                                RIO_ENUM_CMPL_MAGIC);
+        /* Assign component tag to all devices */
+        next_comptag = 1;
+        rio_local_write_config_32(port, RIO_COMPONENT_TAG_CSR, next_comptag++);
+
+        list_for_each_entry(rdev, &rio_devices, global_list) {
+                /* Mark device as discovered */
+                rio_read_config_32(rdev,
+                                   rdev->phys_efptr + RIO_PORT_GEN_CTL_CSR,
+                                   &result);
+                rio_write_config_32(rdev,
+                                    rdev->phys_efptr + RIO_PORT_GEN_CTL_CSR,
+                                    result | RIO_PORT_GEN_DISCOVERED);
+
+                rio_write_config_32(rdev, RIO_COMPONENT_TAG_CSR, next_comptag);
+                rdev->comp_tag = next_comptag++;
+                if (next_comptag >= 0x10000) {
+                        pr_err("RIO: Component Tag Counter Overflow\n");
+                        break;
+                }
+        }
 
         /* Release host device id locks */
         rio_local_write_config_32(port, RIO_HOST_DID_LOCK_CSR,
@@ -267,6 +279,30 @@ static void rio_route_set_ops(struct rio_dev *rdev)
 }
 
 /**
+ * rio_em_set_ops- Sets Error Managment operations for a particular vendor switch
+ * @rdev: RIO device
+ *
+ * Searches the RIO EM ops table for known switch types. If the vid
+ * and did match a switch table entry, then set the em_init() and
+ * em_handle() ops to the table entry values.
+ */
+static void rio_em_set_ops(struct rio_dev *rdev)
+{
+        struct rio_em_ops *cur = __start_rio_em_ops;
+        struct rio_em_ops *end = __end_rio_em_ops;
+
+        while (cur < end) {
+                if ((cur->vid == rdev->vid) && (cur->did == rdev->did)) {
+                        pr_debug("RIO: adding EM ops for %s\n", rio_name(rdev));
+                        rdev->rswitch->em_init = cur->init_hook;
+                        rdev->rswitch->em_handle = cur->handler_hook;
+                        break;
+                }
+                cur++;
+        }
+}
+
+/**
  * rio_add_device- Adds a RIO device to the device model
  * @rdev: RIO device
  *
@@ -336,8 +372,14 @@ static struct rio_dev __devinit *rio_setup_device(struct rio_net *net,
         rdev->asm_rev = result >> 16;
         rio_mport_read_config_32(port, destid, hopcount, RIO_PEF_CAR,
                                  &rdev->pef);
-        if (rdev->pef & RIO_PEF_EXT_FEATURES)
+        if (rdev->pef & RIO_PEF_EXT_FEATURES) {
                 rdev->efptr = result & 0xffff;
+                rdev->phys_efptr = rio_mport_get_physefb(port, 0, destid,
+                                                         hopcount);
+
+                rdev->em_efptr = rio_mport_get_feature(port, 0, destid,
+                                                hopcount, RIO_EFB_ERR_MGMNT);
+        }
 
         rio_mport_read_config_32(port, destid, hopcount, RIO_SRC_OPS_CAR,
                                  &rdev->src_ops);
@@ -366,6 +408,7 @@ static struct rio_dev __devinit *rio_setup_device(struct rio_net *net,
                 rswitch->switchid = next_switchid;
                 rswitch->hopcount = hopcount;
                 rswitch->destid = destid;
+                rswitch->port_ok = 0;
                 rswitch->route_table = kzalloc(sizeof(u8)*
                                         RIO_MAX_ROUTE_ENTRIES(port->sys_size),
                                         GFP_KERNEL);
@@ -379,6 +422,7 @@ static struct rio_dev __devinit *rio_setup_device(struct rio_net *net,
                 dev_set_name(&rdev->dev, "%02x:s:%04x", rdev->net->id,
                              rdev->rswitch->switchid);
                 rio_route_set_ops(rdev);
+                rio_em_set_ops(rdev);
 
                 if (do_enum && rdev->rswitch->clr_table)
                         rdev->rswitch->clr_table(port, destid, hopcount,
@@ -429,23 +473,29 @@ cleanup:
  *
  * Reads the port error status CSR for a particular switch port to
  * determine if the port has an active link.  Returns
- * %PORT_N_ERR_STS_PORT_OK if the port is active or %0 if it is
+ * %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_mport *port, u16 destid, u8 hopcount, int sport)
 {
-        u32 result;
+        u32 result = 0;
         u32 ext_ftr_ptr;
 
-        int *entry = rio_sport_phys_table;
-
-        do {
-                if ((ext_ftr_ptr =
-                     rio_mport_get_feature(port, 0, destid, hopcount, *entry)))
+        ext_ftr_ptr = rio_mport_get_efb(port, 0, destid, hopcount, 0);
 
+        while (ext_ftr_ptr) {
+                rio_mport_read_config_32(port, destid, hopcount,
+                                         ext_ftr_ptr, &result);
+                result = RIO_GET_BLOCK_ID(result);
+                if ((result == RIO_EFB_SER_EP_FREE_ID) ||
+                    (result == RIO_EFB_SER_EP_FREE_ID_V13P) ||
+                    (result == RIO_EFB_SER_EP_FREC_ID))
                         break;
-        } while (*++entry >= 0);
+
+                ext_ftr_ptr = rio_mport_get_efb(port, 0, destid, hopcount,
+                                                ext_ftr_ptr);
+        }
 
         if (ext_ftr_ptr)
                 rio_mport_read_config_32(port, destid, hopcount,
@@ -453,7 +503,7 @@ rio_sport_is_active(struct rio_mport *port, u16 destid, u8 hopcount, int sport)
                                          RIO_PORT_N_ERR_STS_CSR(sport),
                                          &result);
 
-        return (result & PORT_N_ERR_STS_PORT_OK);
+        return result & RIO_PORT_N_ERR_STS_PORT_OK;
 }
 
 /**
@@ -762,8 +812,10 @@ static int __devinit rio_enum_peer(struct rio_net *net, struct rio_mport *port,
                     rio_name(rdev), rdev->vid, rdev->did, num_ports);
                 sw_destid = next_destid;
                 for (port_num = 0; port_num < num_ports; port_num++) {
-                        if (sw_inport == port_num)
+                        if (sw_inport == port_num) {
+                                rdev->rswitch->port_ok |= (1 << port_num);
                                 continue;
+                        }
 
                         cur_destid = next_destid;
 
@@ -773,6 +825,7 @@ static int __devinit rio_enum_peer(struct rio_net *net, struct rio_mport *port,
                                 pr_debug(
                                     "RIO: scanning device on port %d\n",
                                     port_num);
+                                rdev->rswitch->port_ok |= (1 << port_num);
                                 rio_route_add_entry(port, rdev->rswitch,
                                                 RIO_GLOBAL_TABLE,
                                                 RIO_ANY_DESTID(port->sys_size),
@@ -797,9 +850,28 @@ static int __devinit rio_enum_peer(struct rio_net *net, struct rio_mport *port,
                                                     port_num;
                                         }
                                 }
+                        } 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++;
@@ -819,21 +891,16 @@ static int __devinit rio_enum_peer(struct rio_net *net, struct rio_mport *port,
  * rio_enum_complete- Tests if enumeration of a network is complete
  * @port: Master port to send transaction
  *
- * Tests the Component Tag CSR for presence of the magic enumeration
- * complete flag. Return %1 if enumeration is complete or %0 if
+ * Tests the Component Tag CSR 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 tag_csr;
-        int ret = 0;
 
         rio_local_read_config_32(port, RIO_COMPONENT_TAG_CSR, &tag_csr);
-
-        if (tag_csr == RIO_ENUM_CMPL_MAGIC)
-                ret = 1;
-
-        return ret;
+        return (tag_csr & 0xffff) ? 1 : 0;
 }
 
 /**
@@ -915,7 +982,7 @@ rio_disc_peer(struct rio_net *net, struct rio_mport *port, u16 destid,
  *
  * Reads the port error status CSR for the master port to
  * determine if the port has an active link.  Returns
- * %PORT_N_ERR_STS_PORT_OK if the  master port is active
+ * %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)
@@ -936,7 +1003,7 @@ static int rio_mport_is_active(struct rio_mport *port)
                                          RIO_PORT_N_ERR_STS_CSR(port->index),
                                          &result);
 
-        return (result & PORT_N_ERR_STS_PORT_OK);
+        return result & RIO_PORT_N_ERR_STS_PORT_OK;
 }
 
 /**
@@ -1008,6 +1075,32 @@ static void rio_update_route_tables(struct rio_mport *port)
 }
 
 /**
+ * rio_init_em - Initializes RIO Error Management (for switches)
+ * @port: Master port associated with the RIO network
+ *
+ * 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->em_init)) {
+                rdev->rswitch->em_init(rdev);
+        }
+}
+
+/**
+ * rio_pw_enable - Enables/disables port-write handling by a master port
+ * @port: Master port associated with port-write handling
+ * @enable:  1=enable,  0=disable
+ */
+static void rio_pw_enable(struct rio_mport *port, int enable)
+{
+        if (port->ops->pwenable)
+                port->ops->pwenable(port, enable);
+}
+
+/**
  * rio_enum_mport- Start enumeration through a master port
  * @mport: Master port to send transactions
  *
@@ -1050,6 +1143,7 @@ int __devinit rio_enum_mport(struct rio_mport *mport)
                 }
                 rio_update_route_tables(mport);
                 rio_clear_locks(mport);
+                rio_pw_enable(mport, 1);
         } else {
                 printk(KERN_INFO "RIO: master port %d link inactive\n",
                        mport->id);
diff --git a/drivers/rapidio/rio.c b/drivers/rapidio/rio.c
index 67a379216959..8fa732e46bf6 100644
--- a/drivers/rapidio/rio.c
+++ b/drivers/rapidio/rio.c
@@ -5,6 +5,10 @@
  * 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
+ *
  * 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
@@ -333,6 +337,329 @@ int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res)
 }
 
 /**
+ * rio_request_inb_pwrite - request inbound port-write message service
+ * @mport: RIO device to which register inbound port-write callback routine
+ * @pwcback: Callback routine to execute when port-write is received
+ *
+ * Binds a port-write callback function to the RapidIO device.
+ * Returns 0 if the request has been satisfied.
+ */
+int rio_request_inb_pwrite(struct rio_dev *rdev,
+        int (*pwcback)(struct rio_dev *rdev, union rio_pw_msg *msg, int step))
+{
+        int rc = 0;
+
+        spin_lock(&rio_global_list_lock);
+        if (rdev->pwcback != NULL)
+                rc = -ENOMEM;
+        else
+                rdev->pwcback = pwcback;
+
+        spin_unlock(&rio_global_list_lock);
+        return rc;
+}
+EXPORT_SYMBOL_GPL(rio_request_inb_pwrite);
+
+/**
+ * rio_release_inb_pwrite - release inbound port-write message service
+ * @rdev: RIO device which registered for inbound port-write callback
+ *
+ * Removes callback from the rio_dev structure. Returns 0 if the request
+ * has been satisfied.
+ */
+int rio_release_inb_pwrite(struct rio_dev *rdev)
+{
+        int rc = -ENOMEM;
+
+        spin_lock(&rio_global_list_lock);
+        if (rdev->pwcback) {
+                rdev->pwcback = NULL;
+                rc = 0;
+        }
+
+        spin_unlock(&rio_global_list_lock);
+        return rc;
+}
+EXPORT_SYMBOL_GPL(rio_release_inb_pwrite);
+
+/**
+ * rio_mport_get_physefb - Helper function that returns register offset
+ *                      for Physical Layer Extended Features Block.
+ * @rdev: RIO device
+ */
+u32
+rio_mport_get_physefb(struct rio_mport *port, int local,
+                      u16 destid, u8 hopcount)
+{
+        u32 ext_ftr_ptr;
+        u32 ftr_header;
+
+        ext_ftr_ptr = rio_mport_get_efb(port, local, destid, hopcount, 0);
+
+        while (ext_ftr_ptr)  {
+                if (local)
+                        rio_local_read_config_32(port, ext_ftr_ptr,
+                                                 &ftr_header);
+                else
+                        rio_mport_read_config_32(port, destid, hopcount,
+                                                 ext_ftr_ptr, &ftr_header);
+
+                ftr_header = RIO_GET_BLOCK_ID(ftr_header);
+                switch (ftr_header) {
+
+                case RIO_EFB_SER_EP_ID_V13P:
+                case RIO_EFB_SER_EP_REC_ID_V13P:
+                case RIO_EFB_SER_EP_FREE_ID_V13P:
+                case RIO_EFB_SER_EP_ID:
+                case RIO_EFB_SER_EP_REC_ID:
+                case RIO_EFB_SER_EP_FREE_ID:
+                case RIO_EFB_SER_EP_FREC_ID:
+
+                        return ext_ftr_ptr;
+
+                default:
+                        break;
+                }
+
+                ext_ftr_ptr = rio_mport_get_efb(port, local, destid,
+                                                hopcount, ext_ftr_ptr);
+        }
+
+        return ext_ftr_ptr;
+}
+
+/**
+ * rio_get_comptag - Begin or continue searching for a RIO device by component tag
+ * @comp_tag: RIO component tad to match
+ * @from: Previous RIO device found in search, or %NULL for new search
+ *
+ * Iterates through the list of known RIO devices. If a RIO device is
+ * found with a matching @comp_tag, a pointer to its device
+ * structure is returned. Otherwise, %NULL is returned. A new search
+ * is initiated by passing %NULL to the @from argument. Otherwise, if
+ * @from is not %NULL, searches continue from next device on the global
+ * list.
+ */
+static struct rio_dev *rio_get_comptag(u32 comp_tag, struct rio_dev *from)
+{
+        struct list_head *n;
+        struct rio_dev *rdev;
+
+        WARN_ON(in_interrupt());
+        spin_lock(&rio_global_list_lock);
+        n = from ? from->global_list.next : rio_devices.next;
+
+        while (n && (n != &rio_devices)) {
+                rdev = rio_dev_g(n);
+                if (rdev->comp_tag == comp_tag)
+                        goto exit;
+                n = n->next;
+        }
+        rdev = NULL;
+exit:
+        spin_unlock(&rio_global_list_lock);
+        return rdev;
+}
+
+/**
+ * rio_set_port_lockout - Sets/clears LOCKOUT bit (RIO EM 1.3) for a switch port.
+ * @rdev: Pointer to RIO device control structure
+ * @pnum: Switch port number to set LOCKOUT bit
+ * @lock: Operation : set (=1) or clear (=0)
+ */
+int rio_set_port_lockout(struct rio_dev *rdev, u32 pnum, int lock)
+{
+        u8 hopcount = 0xff;
+        u16 destid = rdev->destid;
+        u32 regval;
+
+        if (rdev->rswitch) {
+                destid = rdev->rswitch->destid;
+                hopcount = rdev->rswitch->hopcount;
+        }
+
+        rio_mport_read_config_32(rdev->net->hport, destid, hopcount,
+                                 rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum),
+                                 &regval);
+        if (lock)
+                regval |= RIO_PORT_N_CTL_LOCKOUT;
+        else
+                regval &= ~RIO_PORT_N_CTL_LOCKOUT;
+
+        rio_mport_write_config_32(rdev->net->hport, destid, hopcount,
+                                  rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum),
+                                  regval);
+        return 0;
+}
+
+/**
+ * rio_inb_pwrite_handler - process inbound port-write message
+ * @pw_msg: pointer to inbound port-write message
+ *
+ * Processes an inbound port-write message. Returns 0 if the request
+ * has been satisfied.
+ */
+int rio_inb_pwrite_handler(union rio_pw_msg *pw_msg)
+{
+        struct rio_dev *rdev;
+        struct rio_mport *mport;
+        u8 hopcount;
+        u16 destid;
+        u32 err_status;
+        int rc, portnum;
+
+        rdev = rio_get_comptag(pw_msg->em.comptag, NULL);
+        if (rdev == NULL) {
+                /* Someting bad here (probably enumeration error) */
+                pr_err("RIO: %s No matching device for CTag 0x%08x\n",
+                        __func__, pw_msg->em.comptag);
+                return -EIO;
+        }
+
+        pr_debug("RIO: Port-Write message from %s\n", rio_name(rdev));
+
+#ifdef DEBUG_PW
+        {
+        u32 i;
+        for (i = 0; i < RIO_PW_MSG_SIZE/sizeof(u32);) {
+                        pr_debug("0x%02x: %08x %08x %08x %08x",
+                                 i*4, pw_msg->raw[i], pw_msg->raw[i + 1],
+                                 pw_msg->raw[i + 2], pw_msg->raw[i + 3]);
+                        i += 4;
+        }
+        pr_debug("\n");
+        }
+#endif
+
+        /* Call an external service function (if such is registered
+         * for this device). This may be the service for endpoints that send
+         * device-specific port-write messages. End-point messages expected
+         * to be handled completely by EP specific device driver.
+         * For switches rc==0 signals that no standard processing required.
+         */
+        if (rdev->pwcback != NULL) {
+                rc = rdev->pwcback(rdev, pw_msg, 0);
+                if (rc == 0)
+                        return 0;
+        }
+
+        /* For End-point devices processing stops here */
+        if (!(rdev->pef & RIO_PEF_SWITCH))
+                return 0;
+
+        if (rdev->phys_efptr == 0) {
+                pr_err("RIO_PW: Bad switch initialization for %s\n",
+                        rio_name(rdev));
+                return 0;
+        }
+
+        mport = rdev->net->hport;
+        destid = rdev->rswitch->destid;
+        hopcount = rdev->rswitch->hopcount;
+
+        /*
+         * Process the port-write notification from switch
+         */
+
+        portnum = pw_msg->em.is_port & 0xFF;
+
+        if (rdev->rswitch->em_handle)
+                rdev->rswitch->em_handle(rdev, portnum);
+
+        rio_mport_read_config_32(mport, destid, hopcount,
+                        rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum),
+                        &err_status);
+        pr_debug("RIO_PW: SP%d_ERR_STS_CSR=0x%08x\n", portnum, err_status);
+
+        if (pw_msg->em.errdetect) {
+                pr_debug("RIO_PW: RIO_EM_P%d_ERR_DETECT=0x%08x\n",
+                         portnum, pw_msg->em.errdetect);
+                /* Clear EM Port N Error Detect CSR */
+                rio_mport_write_config_32(mport, destid, hopcount,
+                        rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), 0);
+        }
+
+        if (pw_msg->em.ltlerrdet) {
+                pr_debug("RIO_PW: RIO_EM_LTL_ERR_DETECT=0x%08x\n",
+                         pw_msg->em.ltlerrdet);
+                /* Clear EM L/T Layer Error Detect CSR */
+                rio_mport_write_config_32(mport, destid, hopcount,
+                        rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, 0);
+        }
+
+        /* Clear Port Errors */
+        rio_mport_write_config_32(mport, destid, hopcount,
+                        rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum),
+                        err_status & RIO_PORT_N_ERR_STS_CLR_MASK);
+
+        if (rdev->rswitch->port_ok & (1 << portnum)) {
+                if (err_status & RIO_PORT_N_ERR_STS_PORT_UNINIT) {
+                        rdev->rswitch->port_ok &= ~(1 << portnum);
+                        rio_set_port_lockout(rdev, portnum, 1);
+
+                        rio_mport_write_config_32(mport, destid, hopcount,
+                                rdev->phys_efptr +
+                                        RIO_PORT_N_ACK_STS_CSR(portnum),
+                                RIO_PORT_N_ACK_CLEAR);
+
+                        /* Schedule Extraction Service */
+                        pr_debug("RIO_PW: Device Extraction on [%s]-P%d\n",
+                               rio_name(rdev), portnum);
+                }
+        } else {
+                if (err_status & RIO_PORT_N_ERR_STS_PORT_OK) {
+                        rdev->rswitch->port_ok |= (1 << portnum);
+                        rio_set_port_lockout(rdev, portnum, 0);
+
+                        /* Schedule Insertion Service */
+                        pr_debug("RIO_PW: Device Insertion on [%s]-P%d\n",
+                               rio_name(rdev), portnum);
+                }
+        }
+
+        /* Clear Port-Write Pending bit */
+        rio_mport_write_config_32(mport, destid, hopcount,
+                        rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum),
+                        RIO_PORT_N_ERR_STS_PW_PEND);
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(rio_inb_pwrite_handler);
+
+/**
+ * rio_mport_get_efb - get pointer to next extended features block
+ * @port: Master port to issue transaction
+ * @local: Indicate a local master port or remote device access
+ * @destid: Destination ID of the device
+ * @hopcount: Number of switch hops to the device
+ * @from: Offset of  current Extended Feature block header (if 0 starts
+ * from ExtFeaturePtr)
+ */
+u32
+rio_mport_get_efb(struct rio_mport *port, int local, u16 destid,
+                      u8 hopcount, u32 from)
+{
+        u32 reg_val;
+
+        if (from == 0) {
+                if (local)
+                        rio_local_read_config_32(port, RIO_ASM_INFO_CAR,
+                                                 &reg_val);
+                else
+                        rio_mport_read_config_32(port, destid, hopcount,
+                                                 RIO_ASM_INFO_CAR, &reg_val);
+                return reg_val & RIO_EXT_FTR_PTR_MASK;
+        } else {
+                if (local)
+                        rio_local_read_config_32(port, from, &reg_val);
+                else
+                        rio_mport_read_config_32(port, destid, hopcount,
+                                                 from, &reg_val);
+                return RIO_GET_BLOCK_ID(reg_val);
+        }
+}
+
+/**
  * rio_mport_get_feature - query for devices' extended features
  * @port: Master port to issue transaction
  * @local: Indicate a local master port or remote device access
@@ -472,6 +799,7 @@ int rio_std_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
                                 RIO_STD_RTE_CONF_PORT_SEL_CSR,
                                 (u32)route_port);
         }
+
         udelay(10);
         return 0;
 }
diff --git a/drivers/rapidio/rio.h b/drivers/rapidio/rio.h
index b53c5ec276a5..2f628ce1a1c1 100644
--- a/drivers/rapidio/rio.h
+++ b/drivers/rapidio/rio.h
@@ -18,6 +18,10 @@
 
 extern u32 rio_mport_get_feature(struct rio_mport *mport, int local, u16 destid,
                                  u8 hopcount, int ftr);
+extern u32 rio_mport_get_physefb(struct rio_mport *port, int local,
+                                 u16 destid, u8 hopcount);
+extern u32 rio_mport_get_efb(struct rio_mport *port, int local, u16 destid,
+                             u8 hopcount, u32 from);
 extern int rio_create_sysfs_dev_files(struct rio_dev *rdev);
 extern int rio_enum_mport(struct rio_mport *mport);
 extern int rio_disc_mport(struct rio_mport *mport);
@@ -29,6 +33,7 @@ extern int rio_std_route_get_entry(struct rio_mport *mport, u16 destid,
                                    u8 *route_port);
 extern int rio_std_route_clr_table(struct rio_mport *mport, u16 destid,
                                    u8 hopcount, u16 table);
+extern int rio_set_port_lockout(struct rio_dev *rdev, u32 pnum, int lock);
 
 /* Structures internal to the RIO core code */
 extern struct device_attribute rio_dev_attrs[];
@@ -61,3 +66,28 @@ extern struct rio_route_ops __end_rio_route_ops[];
 
 #define RIO_GET_DID(size, x)    (size ? (x & 0xffff) : ((x & 0x00ff0000) >> 16))
 #define RIO_SET_DID(size, x)    (size ? (x & 0xffff) : ((x & 0x000000ff) << 16))
+
+/*
+ *   RapidIO Error Management
+ */
+extern struct rio_em_ops __start_rio_em_ops[];
+extern struct rio_em_ops __end_rio_em_ops[];
+
+/* Helpers internal to the RIO core code */
+#define DECLARE_RIO_EM_SECTION(section, name, vid, did, init_hook, em_hook)  \
+        static const struct rio_em_ops __rio_em_##name __used   \
+        __section(section) = { vid, did, init_hook, em_hook };
+
+/**
+ * DECLARE_RIO_EM_OPS - Registers switch EM operations
+ * @vid: RIO vendor ID
+ * @did: RIO device ID
+ * @init_hook: Callback that initializes device specific EM
+ * @em_hook: Callback that handles device specific EM
+ *
+ * A &struct rio_em_ops is initialized with the ops and placed into a
+ * RIO-specific kernel section.
+ */
+#define DECLARE_RIO_EM_OPS(vid, did, init_hook, em_hook)        \
+        DECLARE_RIO_EM_SECTION(.rio_em_ops, vid##did,           \
+                        vid, did, init_hook, em_hook)
diff --git a/drivers/rapidio/switches/tsi568.c b/drivers/rapidio/switches/tsi568.c
index bce9112ff0d9..905cf9cb09cc 100644
--- a/drivers/rapidio/switches/tsi568.c
+++ b/drivers/rapidio/switches/tsi568.c
@@ -25,6 +25,9 @@
 #define SPP_ROUTE_CFG_DESTID(n) (0x11070 + 0x100*n)
 #define SPP_ROUTE_CFG_PORT(n)   (0x11074 + 0x100*n)
 
+#define TSI568_SP_MODE_BC       0x10004
+#define  TSI568_SP_MODE_PW_DIS  0x08000000
+
 static int
 tsi568_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
                        u16 table, u16 route_destid, u8 route_port)
@@ -104,3 +107,24 @@ tsi568_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount,
 }
 
 DECLARE_RIO_ROUTE_OPS(RIO_VID_TUNDRA, RIO_DID_TSI568, tsi568_route_add_entry, tsi568_route_get_entry, tsi568_route_clr_table);
+
+static int
+tsi568_em_init(struct rio_dev *rdev)
+{
+        struct rio_mport *mport = rdev->net->hport;
+        u16 destid = rdev->rswitch->destid;
+        u8 hopcount = rdev->rswitch->hopcount;
+        u32 regval;
+
+        pr_debug("TSI568 %s [%d:%d]\n", __func__, destid, hopcount);
+
+        /* Make sure that Port-Writes are disabled (for all ports) */
+        rio_mport_read_config_32(mport, destid, hopcount,
+                        TSI568_SP_MODE_BC, &regval);
+        rio_mport_write_config_32(mport, destid, hopcount,
+                        TSI568_SP_MODE_BC, regval | TSI568_SP_MODE_PW_DIS);
+
+        return 0;
+}
+
+DECLARE_RIO_EM_OPS(RIO_VID_TUNDRA, RIO_DID_TSI568, tsi568_em_init, NULL);
diff --git a/drivers/rapidio/switches/tsi57x.c b/drivers/rapidio/switches/tsi57x.c
index 5ad7880787c9..23040b92ea76 100644
--- a/drivers/rapidio/switches/tsi57x.c
+++ b/drivers/rapidio/switches/tsi57x.c
@@ -25,6 +25,14 @@
 #define SPP_ROUTE_CFG_DESTID(n) (0x11070 + 0x100*n)
 #define SPP_ROUTE_CFG_PORT(n)   (0x11074 + 0x100*n)
 
+#define TSI578_SP_MODE(n)       (0x11004 + n*0x100)
+#define  TSI578_SP_MODE_PW_DIS  0x08000000
+
+#define TSI578_SP_CTL_INDEP(n)  (0x13004 + n*0x100)
+#define TSI578_SP_LUT_PEINF(n)  (0x13010 + n*0x100)
+#define TSI578_SP_CS_TX(n)      (0x13014 + n*0x100)
+#define TSI578_SP_INT_STATUS(n) (0x13018 + n*0x100)
+
 static int
 tsi57x_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
                        u16 table, u16 route_destid, u8 route_port)
@@ -104,3 +112,148 @@ DECLARE_RIO_ROUTE_OPS(RIO_VID_TUNDRA, RIO_DID_TSI572, tsi57x_route_add_entry, ts
 DECLARE_RIO_ROUTE_OPS(RIO_VID_TUNDRA, RIO_DID_TSI574, tsi57x_route_add_entry, tsi57x_route_get_entry, tsi57x_route_clr_table);
 DECLARE_RIO_ROUTE_OPS(RIO_VID_TUNDRA, RIO_DID_TSI577, tsi57x_route_add_entry, tsi57x_route_get_entry, tsi57x_route_clr_table);
 DECLARE_RIO_ROUTE_OPS(RIO_VID_TUNDRA, RIO_DID_TSI578, tsi57x_route_add_entry, tsi57x_route_get_entry, tsi57x_route_clr_table);
+
+static int
+tsi57x_em_init(struct rio_dev *rdev)
+{
+        struct rio_mport *mport = rdev->net->hport;
+        u16 destid = rdev->rswitch->destid;
+        u8 hopcount = rdev->rswitch->hopcount;
+        u32 regval;
+        int portnum;
+
+        pr_debug("TSI578 %s [%d:%d]\n", __func__, destid, hopcount);
+
+        for (portnum = 0; portnum < 16; portnum++) {
+                /* Make sure that Port-Writes are enabled (for all ports) */
+                rio_mport_read_config_32(mport, destid, hopcount,
+                                TSI578_SP_MODE(portnum), &regval);
+                rio_mport_write_config_32(mport, destid, hopcount,
+                                TSI578_SP_MODE(portnum),
+                                regval & ~TSI578_SP_MODE_PW_DIS);
+
+                /* Clear all pending interrupts */
+                rio_mport_read_config_32(mport, destid, hopcount,
+                                rdev->phys_efptr +
+                                        RIO_PORT_N_ERR_STS_CSR(portnum),
+                                &regval);
+                rio_mport_write_config_32(mport, destid, hopcount,
+                                rdev->phys_efptr +
+                                        RIO_PORT_N_ERR_STS_CSR(portnum),
+                                regval & 0x07120214);
+
+                rio_mport_read_config_32(mport, destid, hopcount,
+                                TSI578_SP_INT_STATUS(portnum), &regval);
+                rio_mport_write_config_32(mport, destid, hopcount,
+                                TSI578_SP_INT_STATUS(portnum),
+                                regval & 0x000700bd);
+
+                /* Enable all interrupts to allow ports to send a port-write */
+                rio_mport_read_config_32(mport, destid, hopcount,
+                                TSI578_SP_CTL_INDEP(portnum), &regval);
+                rio_mport_write_config_32(mport, destid, hopcount,
+                                TSI578_SP_CTL_INDEP(portnum),
+                                regval | 0x000b0000);
+
+                /* Skip next (odd) port if the current port is in x4 mode */
+                rio_mport_read_config_32(mport, destid, hopcount,
+                                rdev->phys_efptr + RIO_PORT_N_CTL_CSR(portnum),
+                                &regval);
+                if ((regval & RIO_PORT_N_CTL_PWIDTH) == RIO_PORT_N_CTL_PWIDTH_4)
+                        portnum++;
+        }
+
+        return 0;
+}
+
+static int
+tsi57x_em_handler(struct rio_dev *rdev, u8 portnum)
+{
+        struct rio_mport *mport = rdev->net->hport;
+        u16 destid = rdev->rswitch->destid;
+        u8 hopcount = rdev->rswitch->hopcount;
+        u32 intstat, err_status;
+        int sendcount, checkcount;
+        u8 route_port;
+        u32 regval;
+
+        rio_mport_read_config_32(mport, destid, hopcount,
+                        rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum),
+                        &err_status);
+
+        if ((err_status & RIO_PORT_N_ERR_STS_PORT_OK) &&
+            (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES |
+                          RIO_PORT_N_ERR_STS_PW_INP_ES))) {
+                /* Remove any queued packets by locking/unlocking port */
+                rio_mport_read_config_32(mport, destid, hopcount,
+                        rdev->phys_efptr + RIO_PORT_N_CTL_CSR(portnum),
+                        &regval);
+                if (!(regval & RIO_PORT_N_CTL_LOCKOUT)) {
+                        rio_mport_write_config_32(mport, destid, hopcount,
+                                rdev->phys_efptr + RIO_PORT_N_CTL_CSR(portnum),
+                                regval | RIO_PORT_N_CTL_LOCKOUT);
+                        udelay(50);
+                        rio_mport_write_config_32(mport, destid, hopcount,
+                                rdev->phys_efptr + RIO_PORT_N_CTL_CSR(portnum),
+                                regval);
+                }
+
+                /* Read from link maintenance response register to clear
+                 * valid bit
+                 */
+                rio_mport_read_config_32(mport, destid, hopcount,
+                        rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(portnum),
+                        &regval);
+
+                /* Send a Packet-Not-Accepted/Link-Request-Input-Status control
+                 * symbol to recover from IES/OES
+                 */
+                sendcount = 3;
+                while (sendcount) {
+                        rio_mport_write_config_32(mport, destid, hopcount,
+                                          TSI578_SP_CS_TX(portnum), 0x40fc8000);
+                        checkcount = 3;
+                        while (checkcount--) {
+                                udelay(50);
+                                rio_mport_read_config_32(
+                                        mport, destid, hopcount,
+                                        rdev->phys_efptr +
+                                                RIO_PORT_N_MNT_RSP_CSR(portnum),
+                                        &regval);
+                                if (regval & RIO_PORT_N_MNT_RSP_RVAL)
+                                        goto exit_es;
+                        }
+
+                        sendcount--;
+                }
+        }
+
+exit_es:
+        /* Clear implementation specific error status bits */
+        rio_mport_read_config_32(mport, destid, hopcount,
+                                 TSI578_SP_INT_STATUS(portnum), &intstat);
+        pr_debug("TSI578[%x:%x] SP%d_INT_STATUS=0x%08x\n",
+                 destid, hopcount, portnum, intstat);
+
+        if (intstat & 0x10000) {
+                rio_mport_read_config_32(mport, destid, hopcount,
+                                TSI578_SP_LUT_PEINF(portnum), &regval);
+                regval = (mport->sys_size) ? (regval >> 16) : (regval >> 24);
+                route_port = rdev->rswitch->route_table[regval];
+                pr_debug("RIO: TSI578[%s] P%d LUT Parity Error (destID=%d)\n",
+                        rio_name(rdev), portnum, regval);
+                tsi57x_route_add_entry(mport, destid, hopcount,
+                                RIO_GLOBAL_TABLE, regval, route_port);
+        }
+
+        rio_mport_write_config_32(mport, destid, hopcount,
+                                  TSI578_SP_INT_STATUS(portnum),
+                                  intstat & 0x000700bd);
+
+        return 0;
+}
+
+DECLARE_RIO_EM_OPS(RIO_VID_TUNDRA, RIO_DID_TSI572, tsi57x_em_init, tsi57x_em_handler);
+DECLARE_RIO_EM_OPS(RIO_VID_TUNDRA, RIO_DID_TSI574, tsi57x_em_init, tsi57x_em_handler);
+DECLARE_RIO_EM_OPS(RIO_VID_TUNDRA, RIO_DID_TSI577, tsi57x_em_init, tsi57x_em_handler);
+DECLARE_RIO_EM_OPS(RIO_VID_TUNDRA, RIO_DID_TSI578, tsi57x_em_init, tsi57x_em_handler);