/* * RapidIO interconnect services * (RapidIO Interconnect Specification, http://www.rapidio.org) * * 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 * option) any later version. */ #include <linux/types.h> #include <linux/kernel.h> #include <linux/delay.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/slab.h> #include <linux/interrupt.h> #include "rio.h" static LIST_HEAD(rio_mports); /** * rio_local_get_device_id - Get the base/extended device id for a port * @port: RIO master port from which to get the deviceid * * Reads the base/extended device id from the local device * implementing the master port. Returns the 8/16-bit device * id. */ u16 rio_local_get_device_id(struct rio_mport *port) { u32 result; rio_local_read_config_32(port, RIO_DID_CSR, &result); return (RIO_GET_DID(port->sys_size, result)); } /** * rio_request_inb_mbox - request inbound mailbox service * @mport: RIO master port from which to allocate the mailbox resource * @dev_id: Device specific pointer to pass on event * @mbox: Mailbox number to claim * @entries: Number of entries in inbound mailbox queue * @minb: Callback to execute when inbound message is received * * Requests ownership of an inbound mailbox resource and binds * a callback function to the resource. Returns %0 on success. */ int rio_request_inb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entries, void (*minb) (struct rio_mport * mport, void *dev_id, int mbox, int slot)) { int rc = 0; struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); if (res) { rio_init_mbox_res(res, mbox, mbox); /* Make sure this mailbox isn't in use */ if ((rc = request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE], res)) < 0) { kfree(res); goto out; } mport->inb_msg[mbox].res = res; /* Hook the inbound message callback */ mport->inb_msg[mbox].mcback = minb; rc = rio_open_inb_mbox(mport, dev_id, mbox, entries); } else rc = -ENOMEM; out: return rc; } /** * rio_release_inb_mbox - release inbound mailbox message service * @mport: RIO master port from which to release the mailbox resource * @mbox: Mailbox number to release * * Releases ownership of an inbound mailbox resource. Returns 0 * if the request has been satisfied. */ int rio_release_inb_mbox(struct rio_mport *mport, int mbox) { rio_close_inb_mbox(mport, mbox); /* Release the mailbox resource */ return release_resource(mport->inb_msg[mbox].res); } /** * rio_request_outb_mbox - request outbound mailbox service * @mport: RIO master port from which to allocate the mailbox resource * @dev_id: Device specific pointer to pass on event * @mbox: Mailbox number to claim * @entries: Number of entries in outbound mailbox queue * @moutb: Callback to execute when outbound message is sent * * Requests ownership of an outbound mailbox resource and binds * a callback function to the resource. Returns 0 on success. */ int rio_request_outb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entries, void (*moutb) (struct rio_mport * mport, void *dev_id, int mbox, int slot)) { int rc = 0; struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); if (res) { rio_init_mbox_res(res, mbox, mbox); /* Make sure this outbound mailbox isn't in use */ if ((rc = request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE], res)) < 0) { kfree(res); goto out; } mport->outb_msg[mbox].res = res; /* Hook the inbound message callback */ mport->outb_msg[mbox].mcback = moutb; rc = rio_open_outb_mbox(mport, dev_id, mbox, entries); } else rc = -ENOMEM; out: return rc; } /** * rio_release_outb_mbox - release outbound mailbox message service * @mport: RIO master port from which to release the mailbox resource * @mbox: Mailbox number to release * * Releases ownership of an inbound mailbox resource. Returns 0 * if the request has been satisfied. */ int rio_release_outb_mbox(struct rio_mport *mport, int mbox) { rio_close_outb_mbox(mport, mbox); /* Release the mailbox resource */ return release_resource(mport->outb_msg[mbox].res); } /** * rio_setup_inb_dbell - bind inbound doorbell callback * @mport: RIO master port to bind the doorbell callback * @dev_id: Device specific pointer to pass on event * @res: Doorbell message resource * @dinb: Callback to execute when doorbell is received * * Adds a doorbell resource/callback pair into a port's * doorbell event list. Returns 0 if the request has been * satisfied. */ static int rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res, void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, u16 dst, u16 info)) { int rc = 0; struct rio_dbell *dbell; if (!(dbell = kmalloc(sizeof(struct rio_dbell), GFP_KERNEL))) { rc = -ENOMEM; goto out; } dbell->res = res; dbell->dinb = dinb; dbell->dev_id = dev_id; list_add_tail(&dbell->node, &mport->dbells); out: return rc; } /** * rio_request_inb_dbell - request inbound doorbell message service * @mport: RIO master port from which to allocate the doorbell resource * @dev_id: Device specific pointer to pass on event * @start: Doorbell info range start * @end: Doorbell info range end * @dinb: Callback to execute when doorbell is received * * Requests ownership of an inbound doorbell resource and binds * a callback function to the resource. Returns 0 if the request * has been satisfied. */ int rio_request_inb_dbell(struct rio_mport *mport, void *dev_id, u16 start, u16 end, void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, u16 dst, u16 info)) { int rc = 0; struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); if (res) { rio_init_dbell_res(res, start, end); /* Make sure these doorbells aren't in use */ if ((rc = request_resource(&mport->riores[RIO_DOORBELL_RESOURCE], res)) < 0) { kfree(res); goto out; } /* Hook the doorbell callback */ rc = rio_setup_inb_dbell(mport, dev_id, res, dinb); } else rc = -ENOMEM; out: return rc; } /** * rio_release_inb_dbell - release inbound doorbell message service * @mport: RIO master port from which to release the doorbell resource * @start: Doorbell info range start * @end: Doorbell info range end * * Releases ownership of an inbound doorbell resource and removes * callback from the doorbell event list. Returns 0 if the request * has been satisfied. */ int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end) { int rc = 0, found = 0; struct rio_dbell *dbell; list_for_each_entry(dbell, &mport->dbells, node) { if ((dbell->res->start == start) && (dbell->res->end == end)) { found = 1; break; } } /* If we can't find an exact match, fail */ if (!found) { rc = -EINVAL; goto out; } /* Delete from list */ list_del(&dbell->node); /* Release the doorbell resource */ rc = release_resource(dbell->res); /* Free the doorbell event */ kfree(dbell); out: return rc; } /** * rio_request_outb_dbell - request outbound doorbell message range * @rdev: RIO device from which to allocate the doorbell resource * @start: Doorbell message range start * @end: Doorbell message range end * * Requests ownership of a doorbell message range. Returns a resource * if the request has been satisfied or %NULL on failure. */ struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start, u16 end) { struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); if (res) { rio_init_dbell_res(res, start, end); /* Make sure these doorbells aren't in use */ if (request_resource(&rdev->riores[RIO_DOORBELL_RESOURCE], res) < 0) { kfree(res); res = NULL; } } return res; } /** * rio_release_outb_dbell - release outbound doorbell message range * @rdev: RIO device from which to release the doorbell resource * @res: Doorbell resource to be freed * * Releases ownership of a doorbell message range. Returns 0 if the * request has been satisfied. */ int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res) { int rc = release_resource(res); kfree(res); return rc; } /** * rio_request_inb_pwrite - request inbound port-write message service * @rdev: 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. * @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 */ 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 tag 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. */ struct rio_dev *rio_get_comptag(u32 comp_tag, struct rio_dev *from) { struct list_head *n; struct rio_dev *rdev; 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), ®val); 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_chk_dev_route - Validate route to the specified device. * @rdev: RIO device failed to respond * @nrdev: Last active device on the route to rdev * @npnum: nrdev's port number on the route to rdev * * Follows a route to the specified RIO device to determine the last available * device (and corresponding RIO port) on the route. */ static int rio_chk_dev_route(struct rio_dev *rdev, struct rio_dev **nrdev, int *npnum) { u32 result; int p_port, dstid, rc = -EIO; struct rio_dev *prev = NULL; /* Find switch with failed RIO link */ while (rdev->prev && (rdev->prev->pef & RIO_PEF_SWITCH)) { if (!rio_read_config_32(rdev->prev, RIO_DEV_ID_CAR, &result)) { prev = rdev->prev; break; } rdev = rdev->prev; } if (prev == NULL) goto err_out; dstid = (rdev->pef & RIO_PEF_SWITCH) ? rdev->rswitch->destid : rdev->destid; p_port = prev->rswitch->route_table[dstid]; if (p_port != RIO_INVALID_ROUTE) { pr_debug("RIO: link failed on [%s]-P%d\n", rio_name(prev), p_port); *nrdev = prev; *npnum = p_port; rc = 0; } else pr_debug("RIO: failed to trace route to %s\n", rio_name(rdev)); err_out: return rc; } /** * rio_mport_chk_dev_access - Validate access to the specified device. * @mport: Master port to send transactions * @destid: Device destination ID in network * @hopcount: Number of hops into the network */ int rio_mport_chk_dev_access(struct rio_mport *mport, u16 destid, u8 hopcount) { int i = 0; u32 tmp; while (rio_mport_read_config_32(mport, destid, hopcount, RIO_DEV_ID_CAR, &tmp)) { i++; if (i == RIO_MAX_CHK_RETRY) return -EIO; mdelay(1); } return 0; } /** * rio_chk_dev_access - Validate access to the specified device. * @rdev: Pointer to RIO device control structure */ static int rio_chk_dev_access(struct rio_dev *rdev) { u8 hopcount = 0xff; u16 destid = rdev->destid; if (rdev->rswitch) { destid = rdev->rswitch->destid; hopcount = rdev->rswitch->hopcount; } return rio_mport_chk_dev_access(rdev->net->hport, destid, hopcount); } /** * rio_get_input_status - Sends a Link-Request/Input-Status control symbol and * returns link-response (if requested). * @rdev: RIO devive to issue Input-status command * @pnum: Device port number to issue the command * @lnkresp: Response from a link partner */ static int rio_get_input_status(struct rio_dev *rdev, int pnum, u32 *lnkresp) { struct rio_mport *mport = rdev->net->hport; u16 destid = rdev->rswitch->destid; u8 hopcount = rdev->rswitch->hopcount; u32 regval; int checkcount; if (lnkresp) { /* 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(pnum), ®val); udelay(50); } /* Issue Input-status command */ rio_mport_write_config_32(mport, destid, hopcount, rdev->phys_efptr + RIO_PORT_N_MNT_REQ_CSR(pnum), RIO_MNT_REQ_CMD_IS); /* Exit if the response is not expected */ if (lnkresp == NULL) return 0; checkcount = 3; while (checkcount--) { udelay(50); rio_mport_read_config_32(mport, destid, hopcount, rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum), ®val); if (regval & RIO_PORT_N_MNT_RSP_RVAL) { *lnkresp = regval; return 0; } } return -EIO; } /** * rio_clr_err_stopped - Clears port Error-stopped states. * @rdev: Pointer to RIO device control structure * @pnum: Switch port number to clear errors * @err_status: port error status (if 0 reads register from device) */ static int rio_clr_err_stopped(struct rio_dev *rdev, u32 pnum, u32 err_status) { struct rio_mport *mport = rdev->net->hport; u16 destid = rdev->rswitch->destid; u8 hopcount = rdev->rswitch->hopcount; struct rio_dev *nextdev = rdev->rswitch->nextdev[pnum]; u32 regval; u32 far_ackid, far_linkstat, near_ackid; if (err_status == 0) rio_mport_read_config_32(mport, destid, hopcount, rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), &err_status); if (err_status & RIO_PORT_N_ERR_STS_PW_OUT_ES) { pr_debug("RIO_EM: servicing Output Error-Stopped state\n"); /* * Send a Link-Request/Input-Status control symbol */ if (rio_get_input_status(rdev, pnum, ®val)) { pr_debug("RIO_EM: Input-status response timeout\n"); goto rd_err; } pr_debug("RIO_EM: SP%d Input-status response=0x%08x\n", pnum, regval); far_ackid = (regval & RIO_PORT_N_MNT_RSP_ASTAT) >> 5; far_linkstat = regval & RIO_PORT_N_MNT_RSP_LSTAT; rio_mport_read_config_32(mport, destid, hopcount, rdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(pnum), ®val); pr_debug("RIO_EM: SP%d_ACK_STS_CSR=0x%08x\n", pnum, regval); near_ackid = (regval & RIO_PORT_N_ACK_INBOUND) >> 24; pr_debug("RIO_EM: SP%d far_ackID=0x%02x far_linkstat=0x%02x" \ " near_ackID=0x%02x\n", pnum, far_ackid, far_linkstat, near_ackid); /* * If required, synchronize ackIDs of near and * far sides. */ if ((far_ackid != ((regval & RIO_PORT_N_ACK_OUTSTAND) >> 8)) || (far_ackid != (regval & RIO_PORT_N_ACK_OUTBOUND))) { /* Align near outstanding/outbound ackIDs with * far inbound. */ rio_mport_write_config_32(mport, destid, hopcount, rdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(pnum), (near_ackid << 24) | (far_ackid << 8) | far_ackid); /* Align far outstanding/outbound ackIDs with * near inbound. */ far_ackid++; if (nextdev) rio_write_config_32(nextdev, nextdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(RIO_GET_PORT_NUM(nextdev->swpinfo)), (far_ackid << 24) | (near_ackid << 8) | near_ackid); else pr_debug("RIO_EM: Invalid nextdev pointer (NULL)\n"); } rd_err: rio_mport_read_config_32(mport, destid, hopcount, rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), &err_status); pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status); } if ((err_status & RIO_PORT_N_ERR_STS_PW_INP_ES) && nextdev) { pr_debug("RIO_EM: servicing Input Error-Stopped state\n"); rio_get_input_status(nextdev, RIO_GET_PORT_NUM(nextdev->swpinfo), NULL); udelay(50); rio_mport_read_config_32(mport, destid, hopcount, rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), &err_status); pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status); } return (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES | RIO_PORT_N_ERR_STS_PW_INP_ES)) ? 1 : 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, em_perrdet, em_ltlerrdet; int rc, portnum; rdev = rio_get_comptag(pw_msg->em.comptag, NULL); if (rdev == NULL) { /* Device removed or enumeration error */ pr_debug("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\n", i*4, pw_msg->raw[i], pw_msg->raw[i + 1], pw_msg->raw[i + 2], pw_msg->raw[i + 3]); i += 4; } } #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; } portnum = pw_msg->em.is_port & 0xFF; /* Check if device and route to it are functional: * Sometimes devices may send PW message(s) just before being * powered down (or link being lost). */ if (rio_chk_dev_access(rdev)) { pr_debug("RIO: device access failed - get link partner\n"); /* Scan route to the device and identify failed link. * This will replace device and port reported in PW message. * PW message should not be used after this point. */ if (rio_chk_dev_route(rdev, &rdev, &portnum)) { pr_err("RIO: Route trace for %s failed\n", rio_name(rdev)); return -EIO; } pw_msg = NULL; } /* 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 */ 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 (err_status & RIO_PORT_N_ERR_STS_PORT_OK) { if (!(rdev->rswitch->port_ok & (1 << portnum))) { 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 error-stopped states (if reported). * Depending on the link partner state, two attempts * may be needed for successful recovery. */ if (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES | RIO_PORT_N_ERR_STS_PW_INP_ES)) { if (rio_clr_err_stopped(rdev, portnum, err_status)) rio_clr_err_stopped(rdev, portnum, 0); } } else { /* if (err_status & RIO_PORT_N_ERR_STS_PORT_UNINIT) */ if (rdev->rswitch->port_ok & (1 << portnum)) { 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); } } rio_mport_read_config_32(mport, destid, hopcount, rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), &em_perrdet); if (em_perrdet) { pr_debug("RIO_PW: RIO_EM_P%d_ERR_DETECT=0x%08x\n", portnum, em_perrdet); /* 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); } rio_mport_read_config_32(mport, destid, hopcount, rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, &em_ltlerrdet); if (em_ltlerrdet) { pr_debug("RIO_PW: RIO_EM_LTL_ERR_DETECT=0x%08x\n", 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 remaining error bits */ 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); /* 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, ®_val); else rio_mport_read_config_32(port, destid, hopcount, RIO_ASM_INFO_CAR, ®_val); return reg_val & RIO_EXT_FTR_PTR_MASK; } else { if (local) rio_local_read_config_32(port, from, ®_val); else rio_mport_read_config_32(port, destid, hopcount, from, ®_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 * @destid: Destination ID of the device * @hopcount: Number of switch hops to the device * @ftr: Extended feature code * * Tell if a device supports a given RapidIO capability. * Returns the offset of the requested extended feature * block within the device's RIO configuration space or * 0 in case the device does not support it. Possible * values for @ftr: * * %RIO_EFB_PAR_EP_ID LP/LVDS EP Devices * * %RIO_EFB_PAR_EP_REC_ID LP/LVDS EP Recovery Devices * * %RIO_EFB_PAR_EP_FREE_ID LP/LVDS EP Free Devices * * %RIO_EFB_SER_EP_ID LP/Serial EP Devices * * %RIO_EFB_SER_EP_REC_ID LP/Serial EP Recovery Devices * * %RIO_EFB_SER_EP_FREE_ID LP/Serial EP Free Devices */ u32 rio_mport_get_feature(struct rio_mport * port, int local, u16 destid, u8 hopcount, int ftr) { u32 asm_info, ext_ftr_ptr, ftr_header; if (local) rio_local_read_config_32(port, RIO_ASM_INFO_CAR, &asm_info); else rio_mport_read_config_32(port, destid, hopcount, RIO_ASM_INFO_CAR, &asm_info); ext_ftr_ptr = asm_info & RIO_EXT_FTR_PTR_MASK; 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); if (RIO_GET_BLOCK_ID(ftr_header) == ftr) return ext_ftr_ptr; if (!(ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header))) break; } return 0; } /** * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did * @vid: RIO vid to match or %RIO_ANY_ID to match all vids * @did: RIO did to match or %RIO_ANY_ID to match all dids * @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids * @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_dids * @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 @vid, @did, @asm_vid, @asm_did, the reference * count to the device is incrememted and 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. The reference count for @from is always decremented if it is * not %NULL. */ struct rio_dev *rio_get_asm(u16 vid, u16 did, u16 asm_vid, u16 asm_did, 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 ((vid == RIO_ANY_ID || rdev->vid == vid) && (did == RIO_ANY_ID || rdev->did == did) && (asm_vid == RIO_ANY_ID || rdev->asm_vid == asm_vid) && (asm_did == RIO_ANY_ID || rdev->asm_did == asm_did)) goto exit; n = n->next; } rdev = NULL; exit: rio_dev_put(from); rdev = rio_dev_get(rdev); spin_unlock(&rio_global_list_lock); return rdev; } /** * rio_get_device - Begin or continue searching for a RIO device by vid/did * @vid: RIO vid to match or %RIO_ANY_ID to match all vids * @did: RIO did to match or %RIO_ANY_ID to match all dids * @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 @vid and @did, the reference count to the * device is incrememted and 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. The reference count for * @from is always decremented if it is not %NULL. */ struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from) { return rio_get_asm(vid, did, RIO_ANY_ID, RIO_ANY_ID, from); } /** * rio_std_route_add_entry - Add switch route table entry using standard * registers defined in RIO specification rev.1.3 * @mport: Master port to issue transaction * @destid: Destination ID of the device * @hopcount: Number of switch hops to the device * @table: routing table ID (global or port-specific) * @route_destid: destID entry in the RT * @route_port: destination port for specified destID */ int rio_std_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount, u16 table, u16 route_destid, u8 route_port) { if (table == RIO_GLOBAL_TABLE) { rio_mport_write_config_32(mport, destid, hopcount, RIO_STD_RTE_CONF_DESTID_SEL_CSR, (u32)route_destid); rio_mport_write_config_32(mport, destid, hopcount, RIO_STD_RTE_CONF_PORT_SEL_CSR, (u32)route_port); } udelay(10); return 0; } /** * rio_std_route_get_entry - Read switch route table entry (port number) * associated with specified destID using standard registers defined in RIO * specification rev.1.3 * @mport: Master port to issue transaction * @destid: Destination ID of the device * @hopcount: Number of switch hops to the device * @table: routing table ID (global or port-specific) * @route_destid: destID entry in the RT * @route_port: returned destination port for specified destID */ int rio_std_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount, u16 table, u16 route_destid, u8 *route_port) { u32 result; if (table == RIO_GLOBAL_TABLE) { rio_mport_write_config_32(mport, destid, hopcount, RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid); rio_mport_read_config_32(mport, destid, hopcount, RIO_STD_RTE_CONF_PORT_SEL_CSR, &result); *route_port = (u8)result; } return 0; } /** * rio_std_route_clr_table - Clear swotch route table using standard registers * defined in RIO specification rev.1.3. * @mport: Master port to issue transaction * @destid: Destination ID of the device * @hopcount: Number of switch hops to the device * @table: routing table ID (global or port-specific) */ int rio_std_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount, u16 table) { u32 max_destid = 0xff; u32 i, pef, id_inc = 1, ext_cfg = 0; u32 port_sel = RIO_INVALID_ROUTE; if (table == RIO_GLOBAL_TABLE) { rio_mport_read_config_32(mport, destid, hopcount, RIO_PEF_CAR, &pef); if (mport->sys_size) { rio_mport_read_config_32(mport, destid, hopcount, RIO_SWITCH_RT_LIMIT, &max_destid); max_destid &= RIO_RT_MAX_DESTID; } if (pef & RIO_PEF_EXT_RT) { ext_cfg = 0x80000000; id_inc = 4; port_sel = (RIO_INVALID_ROUTE << 24) | (RIO_INVALID_ROUTE << 16) | (RIO_INVALID_ROUTE << 8) | RIO_INVALID_ROUTE; } for (i = 0; i <= max_destid;) { rio_mport_write_config_32(mport, destid, hopcount, RIO_STD_RTE_CONF_DESTID_SEL_CSR, ext_cfg | i); rio_mport_write_config_32(mport, destid, hopcount, RIO_STD_RTE_CONF_PORT_SEL_CSR, port_sel); i += id_inc; } } udelay(10); return 0; } static void rio_fixup_device(struct rio_dev *dev) { } static int __devinit rio_init(void) { struct rio_dev *dev = NULL; while ((dev = rio_get_device(RIO_ANY_ID, RIO_ANY_ID, dev)) != NULL) { rio_fixup_device(dev); } return 0; } device_initcall(rio_init); int __devinit rio_init_mports(void) { int rc = 0; struct rio_mport *port; list_for_each_entry(port, &rio_mports, node) { if (!request_mem_region(port->iores.start, port->iores.end - port->iores.start, port->name)) { printk(KERN_ERR "RIO: Error requesting master port region 0x%016llx-0x%016llx\n", (u64)port->iores.start, (u64)port->iores.end - 1); rc = -ENOMEM; goto out; } if (port->host_deviceid >= 0) rio_enum_mport(port); else rio_disc_mport(port); } out: return rc; } void rio_register_mport(struct rio_mport *port) { list_add_tail(&port->node, &rio_mports); } EXPORT_SYMBOL_GPL(rio_local_get_device_id); EXPORT_SYMBOL_GPL(rio_get_device); EXPORT_SYMBOL_GPL(rio_get_asm); EXPORT_SYMBOL_GPL(rio_request_inb_dbell); EXPORT_SYMBOL_GPL(rio_release_inb_dbell); EXPORT_SYMBOL_GPL(rio_request_outb_dbell); EXPORT_SYMBOL_GPL(rio_release_outb_dbell); EXPORT_SYMBOL_GPL(rio_request_inb_mbox); EXPORT_SYMBOL_GPL(rio_release_inb_mbox); EXPORT_SYMBOL_GPL(rio_request_outb_mbox); EXPORT_SYMBOL_GPL(rio_release_outb_mbox);