staging/rdma: remove deprecated ipath driver

This driver was moved to staging for eventual deletion.  Time
to complete that task.

Signed-off-by: Doug Ledford <dledford@redhat.com>

MAINTAINERS

@@ -5795,12 +5795,6 @@ M:	Juanjo Ciarlante <jjciarla@raiz.uncu.edu.ar>
 S:	Maintained
 F:	net/ipv4/netfilter/ipt_MASQUERADE.c
 
-IPATH DRIVER
-M:	Mike Marciniszyn <infinipath@intel.com>
-L:	linux-rdma@vger.kernel.org
-S:	Maintained
-F:	drivers/staging/rdma/ipath/
-
 IPMI SUBSYSTEM
 M:	Corey Minyard <minyard@acm.org>
 L:	openipmi-developer@lists.sourceforge.net (moderated for non-subscribers)

drivers/staging/rdma/Kconfig

@@ -24,6 +24,4 @@ if STAGING_RDMA
 
 source "drivers/staging/rdma/hfi1/Kconfig"
 
-source "drivers/staging/rdma/ipath/Kconfig"
-
 endif

drivers/staging/rdma/Makefile

 # Entries for RDMA_STAGING tree
 obj-$(CONFIG_INFINIBAND_HFI1)	+= hfi1/
-obj-$(CONFIG_INFINIBAND_IPATH)	+= ipath/

drivers/staging/rdma/ipath/Kconfig

-config INFINIBAND_IPATH
-	tristate "QLogic HTX HCA support"
-	depends on 64BIT && NET && HT_IRQ
-	---help---
-	This is a driver for the deprecated QLogic Hyper-Transport
-	IB host channel adapter (model QHT7140),
-	including InfiniBand verbs support.  This driver allows these
-	devices to be used with both kernel upper level protocols such
-	as IP-over-InfiniBand as well as with userspace applications
-	(in conjunction with InfiniBand userspace access).
-	For QLogic PCIe QLE based cards, use the QIB driver instead.
-
-	If you have this hardware you will need to boot with PAT disabled
-	on your x86-64 systems, use the nopat kernel parameter.
-
-	Note that this driver will soon be removed entirely from the kernel.

drivers/staging/rdma/ipath/Makefile

-ccflags-y := -DIPATH_IDSTR='"QLogic kernel.org driver"' \
-	-DIPATH_KERN_TYPE=0
-
-obj-$(CONFIG_INFINIBAND_IPATH) += ib_ipath.o
-
-ib_ipath-y := \
-	ipath_cq.o \
-	ipath_diag.o \
-	ipath_dma.o \
-	ipath_driver.o \
-	ipath_eeprom.o \
-	ipath_file_ops.o \
-	ipath_fs.o \
-	ipath_init_chip.o \
-	ipath_intr.o \
-	ipath_keys.o \
-	ipath_mad.o \
-	ipath_mmap.o \
-	ipath_mr.o \
-	ipath_qp.o \
-	ipath_rc.o \
-	ipath_ruc.o \
-	ipath_sdma.o \
-	ipath_srq.o \
-	ipath_stats.o \
-	ipath_sysfs.o \
-	ipath_uc.o \
-	ipath_ud.o \
-	ipath_user_pages.o \
-	ipath_user_sdma.o \
-	ipath_verbs_mcast.o \
-	ipath_verbs.o
-
-ib_ipath-$(CONFIG_HT_IRQ) += ipath_iba6110.o
-
-ib_ipath-$(CONFIG_X86_64) += ipath_wc_x86_64.o
-ib_ipath-$(CONFIG_PPC64) += ipath_wc_ppc64.o

drivers/staging/rdma/ipath/TODO

-The ipath driver has been moved to staging in preparation for its removal in a
-few releases. The driver will be deleted during the 4.6 merge window.
-
-Contact Dennis Dalessandro <dennis.dalessandro@intel.com> and
-Cc: linux-rdma@vger.kernel.org

drivers/staging/rdma/ipath/ipath_cq.c

-/*
- * Copyright (c) 2006, 2007 QLogic Corporation. All rights reserved.
- * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
- *
- * This software is available to you under a choice of one of two
- * licenses.  You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * OpenIB.org BSD license below:
- *
- *     Redistribution and use in source and binary forms, with or
- *     without modification, are permitted provided that the following
- *     conditions are met:
- *
- *      - Redistributions of source code must retain the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer.
- *
- *      - Redistributions in binary form must reproduce the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer in the documentation and/or other materials
- *        provided with the distribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-#include <linux/err.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-
-#include "ipath_verbs.h"
-
-/**
- * ipath_cq_enter - add a new entry to the completion queue
- * @cq: completion queue
- * @entry: work completion entry to add
- * @sig: true if @entry is a solicitated entry
- *
- * This may be called with qp->s_lock held.
- */
-void ipath_cq_enter(struct ipath_cq *cq, struct ib_wc *entry, int solicited)
-{
-	struct ipath_cq_wc *wc;
-	unsigned long flags;
-	u32 head;
-	u32 next;
-
-	spin_lock_irqsave(&cq->lock, flags);
-
-	/*
-	 * Note that the head pointer might be writable by user processes.
-	 * Take care to verify it is a sane value.
-	 */
-	wc = cq->queue;
-	head = wc->head;
-	if (head >= (unsigned) cq->ibcq.cqe) {
-		head = cq->ibcq.cqe;
-		next = 0;
-	} else
-		next = head + 1;
-	if (unlikely(next == wc->tail)) {
-		spin_unlock_irqrestore(&cq->lock, flags);
-		if (cq->ibcq.event_handler) {
-			struct ib_event ev;
-
-			ev.device = cq->ibcq.device;
-			ev.element.cq = &cq->ibcq;
-			ev.event = IB_EVENT_CQ_ERR;
-			cq->ibcq.event_handler(&ev, cq->ibcq.cq_context);
-		}
-		return;
-	}
-	if (cq->ip) {
-		wc->uqueue[head].wr_id = entry->wr_id;
-		wc->uqueue[head].status = entry->status;
-		wc->uqueue[head].opcode = entry->opcode;
-		wc->uqueue[head].vendor_err = entry->vendor_err;
-		wc->uqueue[head].byte_len = entry->byte_len;
-		wc->uqueue[head].ex.imm_data = (__u32 __force) entry->ex.imm_data;
-		wc->uqueue[head].qp_num = entry->qp->qp_num;
-		wc->uqueue[head].src_qp = entry->src_qp;
-		wc->uqueue[head].wc_flags = entry->wc_flags;
-		wc->uqueue[head].pkey_index = entry->pkey_index;
-		wc->uqueue[head].slid = entry->slid;
-		wc->uqueue[head].sl = entry->sl;
-		wc->uqueue[head].dlid_path_bits = entry->dlid_path_bits;
-		wc->uqueue[head].port_num = entry->port_num;
-		/* Make sure entry is written before the head index. */
-		smp_wmb();
-	} else
-		wc->kqueue[head] = *entry;
-	wc->head = next;
-
-	if (cq->notify == IB_CQ_NEXT_COMP ||
-	    (cq->notify == IB_CQ_SOLICITED && solicited)) {
-		cq->notify = IB_CQ_NONE;
-		cq->triggered++;
-		/*
-		 * This will cause send_complete() to be called in
-		 * another thread.
-		 */
-		tasklet_hi_schedule(&cq->comptask);
-	}
-
-	spin_unlock_irqrestore(&cq->lock, flags);
-
-	if (entry->status != IB_WC_SUCCESS)
-		to_idev(cq->ibcq.device)->n_wqe_errs++;
-}
-
-/**
- * ipath_poll_cq - poll for work completion entries
- * @ibcq: the completion queue to poll
- * @num_entries: the maximum number of entries to return
- * @entry: pointer to array where work completions are placed
- *
- * Returns the number of completion entries polled.
- *
- * This may be called from interrupt context.  Also called by ib_poll_cq()
- * in the generic verbs code.
- */
-int ipath_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry)
-{
-	struct ipath_cq *cq = to_icq(ibcq);
-	struct ipath_cq_wc *wc;
-	unsigned long flags;
-	int npolled;
-	u32 tail;
-
-	/* The kernel can only poll a kernel completion queue */
-	if (cq->ip) {
-		npolled = -EINVAL;
-		goto bail;
-	}
-
-	spin_lock_irqsave(&cq->lock, flags);
-
-	wc = cq->queue;
-	tail = wc->tail;
-	if (tail > (u32) cq->ibcq.cqe)
-		tail = (u32) cq->ibcq.cqe;
-	for (npolled = 0; npolled < num_entries; ++npolled, ++entry) {
-		if (tail == wc->head)
-			break;
-		/* The kernel doesn't need a RMB since it has the lock. */
-		*entry = wc->kqueue[tail];
-		if (tail >= cq->ibcq.cqe)
-			tail = 0;
-		else
-			tail++;
-	}
-	wc->tail = tail;
-
-	spin_unlock_irqrestore(&cq->lock, flags);
-
-bail:
-	return npolled;
-}
-
-static void send_complete(unsigned long data)
-{
-	struct ipath_cq *cq = (struct ipath_cq *)data;
-
-	/*
-	 * The completion handler will most likely rearm the notification
-	 * and poll for all pending entries.  If a new completion entry
-	 * is added while we are in this routine, tasklet_hi_schedule()
-	 * won't call us again until we return so we check triggered to
-	 * see if we need to call the handler again.
-	 */
-	for (;;) {
-		u8 triggered = cq->triggered;
-
-		cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
-
-		if (cq->triggered == triggered)
-			return;
-	}
-}
-
-/**
- * ipath_create_cq - create a completion queue
- * @ibdev: the device this completion queue is attached to
- * @attr: creation attributes
- * @context: unused by the InfiniPath driver
- * @udata: unused by the InfiniPath driver
- *
- * Returns a pointer to the completion queue or negative errno values
- * for failure.
- *
- * Called by ib_create_cq() in the generic verbs code.
- */
-struct ib_cq *ipath_create_cq(struct ib_device *ibdev,
-			      const struct ib_cq_init_attr *attr,
-			      struct ib_ucontext *context,
-			      struct ib_udata *udata)
-{
-	int entries = attr->cqe;
-	struct ipath_ibdev *dev = to_idev(ibdev);
-	struct ipath_cq *cq;
-	struct ipath_cq_wc *wc;
-	struct ib_cq *ret;
-	u32 sz;
-
-	if (attr->flags)
-		return ERR_PTR(-EINVAL);
-
-	if (entries < 1 || entries > ib_ipath_max_cqes) {
-		ret = ERR_PTR(-EINVAL);
-		goto done;
-	}
-
-	/* Allocate the completion queue structure. */
-	cq = kmalloc(sizeof(*cq), GFP_KERNEL);
-	if (!cq) {
-		ret = ERR_PTR(-ENOMEM);
-		goto done;
-	}
-
-	/*
-	 * Allocate the completion queue entries and head/tail pointers.
-	 * This is allocated separately so that it can be resized and
-	 * also mapped into user space.
-	 * We need to use vmalloc() in order to support mmap and large
-	 * numbers of entries.
-	 */
-	sz = sizeof(*wc);
-	if (udata && udata->outlen >= sizeof(__u64))
-		sz += sizeof(struct ib_uverbs_wc) * (entries + 1);
-	else
-		sz += sizeof(struct ib_wc) * (entries + 1);
-	wc = vmalloc_user(sz);
-	if (!wc) {
-		ret = ERR_PTR(-ENOMEM);
-		goto bail_cq;
-	}
-
-	/*
-	 * Return the address of the WC as the offset to mmap.
-	 * See ipath_mmap() for details.
-	 */
-	if (udata && udata->outlen >= sizeof(__u64)) {
-		int err;
-
-		cq->ip = ipath_create_mmap_info(dev, sz, context, wc);
-		if (!cq->ip) {
-			ret = ERR_PTR(-ENOMEM);
-			goto bail_wc;
-		}
-
-		err = ib_copy_to_udata(udata, &cq->ip->offset,
-				       sizeof(cq->ip->offset));
-		if (err) {
-			ret = ERR_PTR(err);
-			goto bail_ip;
-		}
-	} else
-		cq->ip = NULL;
-
-	spin_lock(&dev->n_cqs_lock);
-	if (dev->n_cqs_allocated == ib_ipath_max_cqs) {
-		spin_unlock(&dev->n_cqs_lock);
-		ret = ERR_PTR(-ENOMEM);
-		goto bail_ip;
-	}
-
-	dev->n_cqs_allocated++;
-	spin_unlock(&dev->n_cqs_lock);
-
-	if (cq->ip) {
-		spin_lock_irq(&dev->pending_lock);
-		list_add(&cq->ip->pending_mmaps, &dev->pending_mmaps);
-		spin_unlock_irq(&dev->pending_lock);
-	}
-
-	/*
-	 * ib_create_cq() will initialize cq->ibcq except for cq->ibcq.cqe.
-	 * The number of entries should be >= the number requested or return
-	 * an error.
-	 */
-	cq->ibcq.cqe = entries;
-	cq->notify = IB_CQ_NONE;
-	cq->triggered = 0;
-	spin_lock_init(&cq->lock);
-	tasklet_init(&cq->comptask, send_complete, (unsigned long)cq);
-	wc->head = 0;
-	wc->tail = 0;
-	cq->queue = wc;
-
-	ret = &cq->ibcq;
-
-	goto done;
-
-bail_ip:
-	kfree(cq->ip);
-bail_wc:
-	vfree(wc);
-bail_cq:
-	kfree(cq);
-done:
-	return ret;
-}
-
-/**
- * ipath_destroy_cq - destroy a completion queue
- * @ibcq: the completion queue to destroy.
- *
- * Returns 0 for success.
- *
- * Called by ib_destroy_cq() in the generic verbs code.
- */
-int ipath_destroy_cq(struct ib_cq *ibcq)
-{
-	struct ipath_ibdev *dev = to_idev(ibcq->device);
-	struct ipath_cq *cq = to_icq(ibcq);
-
-	tasklet_kill(&cq->comptask);
-	spin_lock(&dev->n_cqs_lock);
-	dev->n_cqs_allocated--;
-	spin_unlock(&dev->n_cqs_lock);
-	if (cq->ip)
-		kref_put(&cq->ip->ref, ipath_release_mmap_info);
-	else
-		vfree(cq->queue);
-	kfree(cq);
-
-	return 0;
-}
-
-/**
- * ipath_req_notify_cq - change the notification type for a completion queue
- * @ibcq: the completion queue
- * @notify_flags: the type of notification to request
- *
- * Returns 0 for success.
- *
- * This may be called from interrupt context.  Also called by
- * ib_req_notify_cq() in the generic verbs code.
- */
-int ipath_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags)
-{
-	struct ipath_cq *cq = to_icq(ibcq);
-	unsigned long flags;
-	int ret = 0;
-
-	spin_lock_irqsave(&cq->lock, flags);
-	/*
-	 * Don't change IB_CQ_NEXT_COMP to IB_CQ_SOLICITED but allow
-	 * any other transitions (see C11-31 and C11-32 in ch. 11.4.2.2).
-	 */
-	if (cq->notify != IB_CQ_NEXT_COMP)
-		cq->notify = notify_flags & IB_CQ_SOLICITED_MASK;
-
-	if ((notify_flags & IB_CQ_REPORT_MISSED_EVENTS) &&
-	    cq->queue->head != cq->queue->tail)
-		ret = 1;
-
-	spin_unlock_irqrestore(&cq->lock, flags);
-
-	return ret;
-}
-
-/**
- * ipath_resize_cq - change the size of the CQ
- * @ibcq: the completion queue
- *
- * Returns 0 for success.
- */
-int ipath_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata)
-{
-	struct ipath_cq *cq = to_icq(ibcq);
-	struct ipath_cq_wc *old_wc;
-	struct ipath_cq_wc *wc;
-	u32 head, tail, n;
-	int ret;
-	u32 sz;
-
-	if (cqe < 1 || cqe > ib_ipath_max_cqes) {
-		ret = -EINVAL;
-		goto bail;
-	}
-
-	/*
-	 * Need to use vmalloc() if we want to support large #s of entries.
-	 */
-	sz = sizeof(*wc);
-	if (udata && udata->outlen >= sizeof(__u64))
-		sz += sizeof(struct ib_uverbs_wc) * (cqe + 1);
-	else
-		sz += sizeof(struct ib_wc) * (cqe + 1);
-	wc = vmalloc_user(sz);
-	if (!wc) {
-		ret = -ENOMEM;
-		goto bail;
-	}
-
-	/* Check that we can write the offset to mmap. */
-	if (udata && udata->outlen >= sizeof(__u64)) {
-		__u64 offset = 0;
-
-		ret = ib_copy_to_udata(udata, &offset, sizeof(offset));
-		if (ret)
-			goto bail_free;
-	}
-
-	spin_lock_irq(&cq->lock);
-	/*
-	 * Make sure head and tail are sane since they
-	 * might be user writable.
-	 */
-	old_wc = cq->queue;
-	head = old_wc->head;
-	if (head > (u32) cq->ibcq.cqe)
-		head = (u32) cq->ibcq.cqe;
-	tail = old_wc->tail;
-	if (tail > (u32) cq->ibcq.cqe)
-		tail = (u32) cq->ibcq.cqe;
-	if (head < tail)
-		n = cq->ibcq.cqe + 1 + head - tail;
-	else
-		n = head - tail;
-	if (unlikely((u32)cqe < n)) {
-		ret = -EINVAL;
-		goto bail_unlock;
-	}
-	for (n = 0; tail != head; n++) {
-		if (cq->ip)
-			wc->uqueue[n] = old_wc->uqueue[tail];
-		else
-			wc->kqueue[n] = old_wc->kqueue[tail];
-		if (tail == (u32) cq->ibcq.cqe)
-			tail = 0;
-		else
-			tail++;
-	}
-	cq->ibcq.cqe = cqe;
-	wc->head = n;
-	wc->tail = 0;
-	cq->queue = wc;
-	spin_unlock_irq(&cq->lock);
-
-	vfree(old_wc);
-
-	if (cq->ip) {
-		struct ipath_ibdev *dev = to_idev(ibcq->device);
-		struct ipath_mmap_info *ip = cq->ip;
-
-		ipath_update_mmap_info(dev, ip, sz, wc);
-
-		/*
-		 * Return the offset to mmap.
-		 * See ipath_mmap() for details.
-		 */
-		if (udata && udata->outlen >= sizeof(__u64)) {
-			ret = ib_copy_to_udata(udata, &ip->offset,
-					       sizeof(ip->offset));
-			if (ret)
-				goto bail;
-		}
-
-		spin_lock_irq(&dev->pending_lock);
-		if (list_empty(&ip->pending_mmaps))
-			list_add(&ip->pending_mmaps, &dev->pending_mmaps);
-		spin_unlock_irq(&dev->pending_lock);
-	}
-
-	ret = 0;
-	goto bail;
-
-bail_unlock:
-	spin_unlock_irq(&cq->lock);
-bail_free:
-	vfree(wc);
-bail:
-	return ret;
-}

drivers/staging/rdma/ipath/ipath_debug.h

-/*
- * Copyright (c) 2006, 2007 QLogic Corporation. All rights reserved.
- * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
- *
- * This software is available to you under a choice of one of two
- * licenses.  You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * OpenIB.org BSD license below:
- *
- *     Redistribution and use in source and binary forms, with or
- *     without modification, are permitted provided that the following
- *     conditions are met:
- *
- *      - Redistributions of source code must retain the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer.
- *
- *      - Redistributions in binary form must reproduce the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer in the documentation and/or other materials
- *        provided with the distribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-#ifndef _IPATH_DEBUG_H
-#define _IPATH_DEBUG_H
-
-#ifndef _IPATH_DEBUGGING	/* debugging enabled or not */
-#define _IPATH_DEBUGGING 1
-#endif
-
-#if _IPATH_DEBUGGING
-
-/*
- * Mask values for debugging.  The scheme allows us to compile out any
- * of the debug tracing stuff, and if compiled in, to enable or disable
- * dynamically.  This can be set at modprobe time also:
- *      modprobe infinipath.ko infinipath_debug=7
- */
-
-#define __IPATH_INFO        0x1	/* generic low verbosity stuff */
-#define __IPATH_DBG         0x2	/* generic debug */
-#define __IPATH_TRSAMPLE    0x8	/* generate trace buffer sample entries */
-/* leave some low verbosity spots open */
-#define __IPATH_VERBDBG     0x40	/* very verbose debug */
-#define __IPATH_PKTDBG      0x80	/* print packet data */
-/* print process startup (init)/exit messages */
-#define __IPATH_PROCDBG     0x100
-/* print mmap/fault stuff, not using VDBG any more */
-#define __IPATH_MMDBG       0x200
-#define __IPATH_ERRPKTDBG   0x400
-#define __IPATH_USER_SEND   0x1000	/* use user mode send */
-#define __IPATH_KERNEL_SEND 0x2000	/* use kernel mode send */
-#define __IPATH_EPKTDBG     0x4000	/* print ethernet packet data */
-#define __IPATH_IPATHDBG    0x10000	/* Ethernet (IPATH) gen debug */
-#define __IPATH_IPATHWARN   0x20000	/* Ethernet (IPATH) warnings */
-#define __IPATH_IPATHERR    0x40000	/* Ethernet (IPATH) errors */
-#define __IPATH_IPATHPD     0x80000	/* Ethernet (IPATH) packet dump */
-#define __IPATH_IPATHTABLE  0x100000	/* Ethernet (IPATH) table dump */
-#define __IPATH_LINKVERBDBG 0x200000	/* very verbose linkchange debug */
-
-#else				/* _IPATH_DEBUGGING */
-
-/*
- * define all of these even with debugging off, for the few places that do
- * if(infinipath_debug & _IPATH_xyzzy), but in a way that will make the
- * compiler eliminate the code
- */
-
-#define __IPATH_INFO      0x0	/* generic low verbosity stuff */
-#define __IPATH_DBG       0x0	/* generic debug */
-#define __IPATH_TRSAMPLE  0x0	/* generate trace buffer sample entries */
-#define __IPATH_VERBDBG   0x0	/* very verbose debug */
-#define __IPATH_PKTDBG    0x0	/* print packet data */
-#define __IPATH_PROCDBG   0x0	/* process startup (init)/exit messages */
-/* print mmap/fault stuff, not using VDBG any more */
-#define __IPATH_MMDBG     0x0
-#define __IPATH_EPKTDBG   0x0	/* print ethernet packet data */
-#define __IPATH_IPATHDBG  0x0	/* Ethernet (IPATH) table dump on */
-#define __IPATH_IPATHWARN 0x0	/* Ethernet (IPATH) warnings on   */
-#define __IPATH_IPATHERR  0x0	/* Ethernet (IPATH) errors on   */
-#define __IPATH_IPATHPD   0x0	/* Ethernet (IPATH) packet dump on   */
-#define __IPATH_IPATHTABLE 0x0	/* Ethernet (IPATH) packet dump on   */
-#define __IPATH_LINKVERBDBG 0x0	/* very verbose linkchange debug */
-
-#endif				/* _IPATH_DEBUGGING */
-
-#define __IPATH_VERBOSEDBG __IPATH_VERBDBG
-
-#endif				/* _IPATH_DEBUG_H */

drivers/staging/rdma/ipath/ipath_diag.c

-/*
- * Copyright (c) 2006, 2007, 2008 QLogic Corporation. All rights reserved.
- * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
- *
- * This software is available to you under a choice of one of two
- * licenses.  You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * OpenIB.org BSD license below:
- *
- *     Redistribution and use in source and binary forms, with or
- *     without modification, are permitted provided that the following
- *     conditions are met:
- *
- *      - Redistributions of source code must retain the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer.
- *
- *      - Redistributions in binary form must reproduce the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer in the documentation and/or other materials
- *        provided with the distribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-/*
- * This file contains support for diagnostic functions.  It is accessed by
- * opening the ipath_diag device, normally minor number 129.  Diagnostic use
- * of the InfiniPath chip may render the chip or board unusable until the
- * driver is unloaded, or in some cases, until the system is rebooted.
- *
- * Accesses to the chip through this interface are not similar to going
- * through the /sys/bus/pci resource mmap interface.
- */
-
-#include <linux/io.h>
-#include <linux/pci.h>
-#include <linux/vmalloc.h>
-#include <linux/fs.h>
-#include <linux/export.h>
-#include <asm/uaccess.h>
-
-#include "ipath_kernel.h"
-#include "ipath_common.h"
-
-int ipath_diag_inuse;
-static int diag_set_link;
-
-static int ipath_diag_open(struct inode *in, struct file *fp);
-static int ipath_diag_release(struct inode *in, struct file *fp);
-static ssize_t ipath_diag_read(struct file *fp, char __user *data,
-			       size_t count, loff_t *off);
-static ssize_t ipath_diag_write(struct file *fp, const char __user *data,
-				size_t count, loff_t *off);
-
-static const struct file_operations diag_file_ops = {
-	.owner = THIS_MODULE,
-	.write = ipath_diag_write,
-	.read = ipath_diag_read,
-	.open = ipath_diag_open,
-	.release = ipath_diag_release,
-	.llseek = default_llseek,
-};
-
-static ssize_t ipath_diagpkt_write(struct file *fp,
-				   const char __user *data,
-				   size_t count, loff_t *off);
-
-static const struct file_operations diagpkt_file_ops = {
-	.owner = THIS_MODULE,
-	.write = ipath_diagpkt_write,
-	.llseek = noop_llseek,
-};
-
-static atomic_t diagpkt_count = ATOMIC_INIT(0);
-static struct cdev *diagpkt_cdev;
-static struct device *diagpkt_dev;
-
-int ipath_diag_add(struct ipath_devdata *dd)
-{
-	char name[16];
-	int ret = 0;
-
-	if (atomic_inc_return(&diagpkt_count) == 1) {
-		ret = ipath_cdev_init(IPATH_DIAGPKT_MINOR,
-				      "ipath_diagpkt", &diagpkt_file_ops,
-				      &diagpkt_cdev, &diagpkt_dev);
-
-		if (ret) {
-			ipath_dev_err(dd, "Couldn't create ipath_diagpkt "
-				      "device: %d", ret);
-			goto done;
-		}
-	}
-
-	snprintf(name, sizeof(name), "ipath_diag%d", dd->ipath_unit);
-
-	ret = ipath_cdev_init(IPATH_DIAG_MINOR_BASE + dd->ipath_unit, name,
-			      &diag_file_ops, &dd->diag_cdev,
-			      &dd->diag_dev);
-	if (ret)
-		ipath_dev_err(dd, "Couldn't create %s device: %d",
-			      name, ret);
-
-done:
-	return ret;
-}
-
-void ipath_diag_remove(struct ipath_devdata *dd)
-{
-	if (atomic_dec_and_test(&diagpkt_count))
-		ipath_cdev_cleanup(&diagpkt_cdev, &diagpkt_dev);
-
-	ipath_cdev_cleanup(&dd->diag_cdev, &dd->diag_dev);
-}
-
-/**
- * ipath_read_umem64 - read a 64-bit quantity from the chip into user space
- * @dd: the infinipath device
- * @uaddr: the location to store the data in user memory
- * @caddr: the source chip address (full pointer, not offset)
- * @count: number of bytes to copy (multiple of 32 bits)
- *
- * This function also localizes all chip memory accesses.
- * The copy should be written such that we read full cacheline packets
- * from the chip.  This is usually used for a single qword
- *
- * NOTE:  This assumes the chip address is 64-bit aligned.
- */
-static int ipath_read_umem64(struct ipath_devdata *dd, void __user *uaddr,
-			     const void __iomem *caddr, size_t count)
-{
-	const u64 __iomem *reg_addr = caddr;
-	const u64 __iomem *reg_end = reg_addr + (count / sizeof(u64));
-	int ret;
-
-	/* not very efficient, but it works for now */
-	if (reg_addr < dd->ipath_kregbase || reg_end > dd->ipath_kregend) {
-		ret = -EINVAL;
-		goto bail;
-	}
-	while (reg_addr < reg_end) {
-		u64 data = readq(reg_addr);
-		if (copy_to_user(uaddr, &data, sizeof(u64))) {
-			ret = -EFAULT;
-			goto bail;
-		}
-		reg_addr++;
-		uaddr += sizeof(u64);
-	}
-	ret = 0;
-bail:
-	return ret;
-}
-
-/**
- * ipath_write_umem64 - write a 64-bit quantity to the chip from user space
- * @dd: the infinipath device
- * @caddr: the destination chip address (full pointer, not offset)
- * @uaddr: the source of the data in user memory
- * @count: the number of bytes to copy (multiple of 32 bits)
- *
- * This is usually used for a single qword
- * NOTE:  This assumes the chip address is 64-bit aligned.
- */
-
-static int ipath_write_umem64(struct ipath_devdata *dd, void __iomem *caddr,
-			      const void __user *uaddr, size_t count)
-{
-	u64 __iomem *reg_addr = caddr;
-	const u64 __iomem *reg_end = reg_addr + (count / sizeof(u64));
-	int ret;
-
-	/* not very efficient, but it works for now */
-	if (reg_addr < dd->ipath_kregbase || reg_end > dd->ipath_kregend) {
-		ret = -EINVAL;
-		goto bail;
-	}
-	while (reg_addr < reg_end) {
-		u64 data;
-		if (copy_from_user(&data, uaddr, sizeof(data))) {
-			ret = -EFAULT;
-			goto bail;
-		}
-		writeq(data, reg_addr);
-
-		reg_addr++;
-		uaddr += sizeof(u64);
-	}
-	ret = 0;
-bail:
-	return ret;
-}
-
-/**
- * ipath_read_umem32 - read a 32-bit quantity from the chip into user space
- * @dd: the infinipath device
- * @uaddr: the location to store the data in user memory
- * @caddr: the source chip address (full pointer, not offset)
- * @count: number of bytes to copy
- *
- * read 32 bit values, not 64 bit; for memories that only
- * support 32 bit reads; usually a single dword.
- */
-static int ipath_read_umem32(struct ipath_devdata *dd, void __user *uaddr,
-			     const void __iomem *caddr, size_t count)
-{
-	const u32 __iomem *reg_addr = caddr;
-	const u32 __iomem *reg_end = reg_addr + (count / sizeof(u32));
-	int ret;
-
-	if (reg_addr < (u32 __iomem *) dd->ipath_kregbase ||
-	    reg_end > (u32 __iomem *) dd->ipath_kregend) {
-		ret = -EINVAL;
-		goto bail;
-	}
-	/* not very efficient, but it works for now */
-	while (reg_addr < reg_end) {
-		u32 data = readl(reg_addr);
-		if (copy_to_user(uaddr, &data, sizeof(data))) {
-			ret = -EFAULT;
-			goto bail;
-		}
-
-		reg_addr++;
-		uaddr += sizeof(u32);
-
-	}
-	ret = 0;
-bail:
-	return ret;
-}
-
-/**
- * ipath_write_umem32 - write a 32-bit quantity to the chip from user space
- * @dd: the infinipath device
- * @caddr: the destination chip address (full pointer, not offset)
- * @uaddr: the source of the data in user memory
- * @count: number of bytes to copy
- *
- * write 32 bit values, not 64 bit; for memories that only
- * support 32 bit write; usually a single dword.
- */
-
-static int ipath_write_umem32(struct ipath_devdata *dd, void __iomem *caddr,
-			      const void __user *uaddr, size_t count)
-{
-	u32 __iomem *reg_addr = caddr;
-	const u32 __iomem *reg_end = reg_addr + (count / sizeof(u32));
-	int ret;
-
-	if (reg_addr < (u32 __iomem *) dd->ipath_kregbase ||
-	    reg_end > (u32 __iomem *) dd->ipath_kregend) {
-		ret = -EINVAL;
-		goto bail;
-	}
-	while (reg_addr < reg_end) {
-		u32 data;
-		if (copy_from_user(&data, uaddr, sizeof(data))) {
-			ret = -EFAULT;
-			goto bail;
-		}
-		writel(data, reg_addr);
-
-		reg_addr++;
-		uaddr += sizeof(u32);
-	}
-	ret = 0;
-bail:
-	return ret;
-}
-
-static int ipath_diag_open(struct inode *in, struct file *fp)
-{
-	int unit = iminor(in) - IPATH_DIAG_MINOR_BASE;
-	struct ipath_devdata *dd;
-	int ret;
-
-	mutex_lock(&ipath_mutex);
-
-	if (ipath_diag_inuse) {
-		ret = -EBUSY;
-		goto bail;
-	}
-
-	dd = ipath_lookup(unit);
-
-	if (dd == NULL || !(dd->ipath_flags & IPATH_PRESENT) ||
-	    !dd->ipath_kregbase) {
-		ret = -ENODEV;
-		goto bail;
-	}
-
-	fp->private_data = dd;
-	ipath_diag_inuse = -2;
-	diag_set_link = 0;
-	ret = 0;
-
-	/* Only expose a way to reset the device if we
-	   make it into diag mode. */
-	ipath_expose_reset(&dd->pcidev->dev);
-
-bail:
-	mutex_unlock(&ipath_mutex);
-
-	return ret;
-}
-
-/**
- * ipath_diagpkt_write - write an IB packet
- * @fp: the diag data device file pointer
- * @data: ipath_diag_pkt structure saying where to get the packet
- * @count: size of data to write
- * @off: unused by this code
- */
-static ssize_t ipath_diagpkt_write(struct file *fp,
-				   const char __user *data,
-				   size_t count, loff_t *off)
-{
-	u32 __iomem *piobuf;
-	u32 plen, pbufn, maxlen_reserve;
-	struct ipath_diag_pkt odp;
-	struct ipath_diag_xpkt dp;
-	u32 *tmpbuf = NULL;
-	struct ipath_devdata *dd;
-	ssize_t ret = 0;
-	u64 val;
-	u32 l_state, lt_state; /* LinkState, LinkTrainingState */
-
-
-	if (count == sizeof(dp)) {
-		if (copy_from_user(&dp, data, sizeof(dp))) {
-			ret = -EFAULT;
-			goto bail;
-		}
-	} else if (count == sizeof(odp)) {
-		if (copy_from_user(&odp, data, sizeof(odp))) {
-			ret = -EFAULT;
-			goto bail;
-		}
-		dp.len = odp.len;
-		dp.unit = odp.unit;
-		dp.data = odp.data;
-		dp.pbc_wd = 0;
-	} else {
-		ret = -EINVAL;
-		goto bail;
-	}
-
-	/* send count must be an exact number of dwords */
-	if (dp.len & 3) {
-		ret = -EINVAL;
-		goto bail;
-	}
-
-	plen = dp.len >> 2;
-
-	dd = ipath_lookup(dp.unit);
-	if (!dd || !(dd->ipath_flags & IPATH_PRESENT) ||
-	    !dd->ipath_kregbase) {
-		ipath_cdbg(VERBOSE, "illegal unit %u for diag data send\n",
-			   dp.unit);
-		ret = -ENODEV;
-		goto bail;
-	}
-
-	if (ipath_diag_inuse && !diag_set_link &&
-	    !(dd->ipath_flags & IPATH_LINKACTIVE)) {
-		diag_set_link = 1;
-		ipath_cdbg(VERBOSE, "Trying to set to set link active for "
-			   "diag pkt\n");
-		ipath_set_linkstate(dd, IPATH_IB_LINKARM);
-		ipath_set_linkstate(dd, IPATH_IB_LINKACTIVE);
-	}
-
-	if (!(dd->ipath_flags & IPATH_INITTED)) {
-		/* no hardware, freeze, etc. */
-		ipath_cdbg(VERBOSE, "unit %u not usable\n", dd->ipath_unit);
-		ret = -ENODEV;
-		goto bail;
-	}
-	/*
-	 * Want to skip check for l_state if using custom PBC,
-	 * because we might be trying to force an SM packet out.
-	 * first-cut, skip _all_ state checking in that case.
-	 */
-	val = ipath_ib_state(dd, dd->ipath_lastibcstat);
-	lt_state = ipath_ib_linktrstate(dd, dd->ipath_lastibcstat);
-	l_state = ipath_ib_linkstate(dd, dd->ipath_lastibcstat);
-	if (!dp.pbc_wd && (lt_state != INFINIPATH_IBCS_LT_STATE_LINKUP ||
-	    (val != dd->ib_init && val != dd->ib_arm &&
-	    val != dd->ib_active))) {
-		ipath_cdbg(VERBOSE, "unit %u not ready (state %llx)\n",
-			   dd->ipath_unit, (unsigned long long) val);
-		ret = -EINVAL;
-		goto bail;
-	}
-
-	/*
-	 * need total length before first word written, plus 2 Dwords. One Dword
-	 * is for padding so we get the full user data when not aligned on
-	 * a word boundary. The other Dword is to make sure we have room for the
-	 * ICRC which gets tacked on later.
-	 */
-	maxlen_reserve = 2 * sizeof(u32);
-	if (dp.len > dd->ipath_ibmaxlen - maxlen_reserve) {
-		ipath_dbg("Pkt len 0x%x > ibmaxlen %x\n",
-			  dp.len, dd->ipath_ibmaxlen);
-		ret = -EINVAL;
-		goto bail;
-	}
-
-	plen = sizeof(u32) + dp.len;
-
-	tmpbuf = vmalloc(plen);
-	if (!tmpbuf) {
-		dev_info(&dd->pcidev->dev, "Unable to allocate tmp buffer, "
-			 "failing\n");
-		ret = -ENOMEM;
-		goto bail;
-	}
-
-	if (copy_from_user(tmpbuf,
-			   (const void __user *) (unsigned long) dp.data,
-			   dp.len)) {
-		ret = -EFAULT;
-		goto bail;
-	}
-
-	plen >>= 2;		/* in dwords */
-
-	piobuf = ipath_getpiobuf(dd, plen, &pbufn);
-	if (!piobuf) {
-		ipath_cdbg(VERBOSE, "No PIO buffers avail unit for %u\n",
-			   dd->ipath_unit);
-		ret = -EBUSY;
-		goto bail;
-	}
-	/* disarm it just to be extra sure */
-	ipath_disarm_piobufs(dd, pbufn, 1);
-
-	if (ipath_debug & __IPATH_PKTDBG)
-		ipath_cdbg(VERBOSE, "unit %u 0x%x+1w pio%d\n",
-			   dd->ipath_unit, plen - 1, pbufn);
-
-	if (dp.pbc_wd == 0)
-		dp.pbc_wd = plen;
-	writeq(dp.pbc_wd, piobuf);
-	/*
-	 * Copy all by the trigger word, then flush, so it's written
-	 * to chip before trigger word, then write trigger word, then
-	 * flush again, so packet is sent.
-	 */
-	if (dd->ipath_flags & IPATH_PIO_FLUSH_WC) {
-		ipath_flush_wc();
-		__iowrite32_copy(piobuf + 2, tmpbuf, plen - 1);
-		ipath_flush_wc();
-		__raw_writel(tmpbuf[plen - 1], piobuf + plen + 1);
-	} else
-		__iowrite32_copy(piobuf + 2, tmpbuf, plen);
-
-	ipath_flush_wc();
-
-	ret = sizeof(dp);
-
-bail:
-	vfree(tmpbuf);
-	return ret;
-}
-
-static int ipath_diag_release(struct inode *in, struct file *fp)
-{
-	mutex_lock(&ipath_mutex);
-	ipath_diag_inuse = 0;
-	fp->private_data = NULL;
-	mutex_unlock(&ipath_mutex);
-	return 0;
-}
-
-static ssize_t ipath_diag_read(struct file *fp, char __user *data,
-			       size_t count, loff_t *off)
-{
-	struct ipath_devdata *dd = fp->private_data;
-	void __iomem *kreg_base;
-	ssize_t ret;
-
-	kreg_base = dd->ipath_kregbase;
-
-	if (count == 0)
-		ret = 0;
-	else if ((count % 4) || (*off % 4))
-		/* address or length is not 32-bit aligned, hence invalid */
-		ret = -EINVAL;
-	else if (ipath_diag_inuse < 1 && (*off || count != 8))
-		ret = -EINVAL;  /* prevent cat /dev/ipath_diag* */
-	else if ((count % 8) || (*off % 8))
-		/* address or length not 64-bit aligned; do 32-bit reads */
-		ret = ipath_read_umem32(dd, data, kreg_base + *off, count);
-	else
-		ret = ipath_read_umem64(dd, data, kreg_base + *off, count);
-
-	if (ret >= 0) {
-		*off += count;
-		ret = count;
-		if (ipath_diag_inuse == -2)
-			ipath_diag_inuse++;
-	}
-
-	return ret;
-}
-
-static ssize_t ipath_diag_write(struct file *fp, const char __user *data,
-				size_t count, loff_t *off)
-{
-	struct ipath_devdata *dd = fp->private_data;
-	void __iomem *kreg_base;
-	ssize_t ret;
-
-	kreg_base = dd->ipath_kregbase;
-
-	if (count == 0)
-		ret = 0;
-	else if ((count % 4) || (*off % 4))
-		/* address or length is not 32-bit aligned, hence invalid */
-		ret = -EINVAL;
-	else if ((ipath_diag_inuse == -1 && (*off || count != 8)) ||
-		 ipath_diag_inuse == -2)  /* read qw off 0, write qw off 0 */
-		ret = -EINVAL;  /* before any other write allowed */
-	else if ((count % 8) || (*off % 8))
-		/* address or length not 64-bit aligned; do 32-bit writes */
-		ret = ipath_write_umem32(dd, kreg_base + *off, data, count);
-	else
-		ret = ipath_write_umem64(dd, kreg_base + *off, data, count);
-
-	if (ret >= 0) {
-		*off += count;
-		ret = count;
-		if (ipath_diag_inuse == -1)
-			ipath_diag_inuse = 1; /* all read/write OK now */
-	}
-
-	return ret;
-}

drivers/staging/rdma/ipath/ipath_dma.c

-/*
- * Copyright (c) 2006 QLogic, Corporation. All rights reserved.
- *
- * This software is available to you under a choice of one of two
- * licenses.  You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * OpenIB.org BSD license below:
- *
- *     Redistribution and use in source and binary forms, with or
- *     without modification, are permitted provided that the following
- *     conditions are met:
- *
- *      - Redistributions of source code must retain the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer.
- *
- *      - Redistributions in binary form must reproduce the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer in the documentation and/or other materials
- *        provided with the distribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-#include <linux/scatterlist.h>
-#include <linux/gfp.h>
-#include <rdma/ib_verbs.h>
-
-#include "ipath_verbs.h"
-
-#define BAD_DMA_ADDRESS ((u64) 0)
-
-/*
- * The following functions implement driver specific replacements
- * for the ib_dma_*() functions.
- *
- * These functions return kernel virtual addresses instead of
- * device bus addresses since the driver uses the CPU to copy
- * data instead of using hardware DMA.
- */
-
-static int ipath_mapping_error(struct ib_device *dev, u64 dma_addr)
-{
-	return dma_addr == BAD_DMA_ADDRESS;
-}
-
-static u64 ipath_dma_map_single(struct ib_device *dev,
-			        void *cpu_addr, size_t size,
-			        enum dma_data_direction direction)
-{
-	BUG_ON(!valid_dma_direction(direction));
-	return (u64) cpu_addr;
-}
-
-static void ipath_dma_unmap_single(struct ib_device *dev,
-				   u64 addr, size_t size,
-				   enum dma_data_direction direction)
-{
-	BUG_ON(!valid_dma_direction(direction));
-}
-
-static u64 ipath_dma_map_page(struct ib_device *dev,
-			      struct page *page,
-			      unsigned long offset,
-			      size_t size,
-			      enum dma_data_direction direction)
-{
-	u64 addr;
-
-	BUG_ON(!valid_dma_direction(direction));
-
-	if (offset + size > PAGE_SIZE) {
-		addr = BAD_DMA_ADDRESS;
-		goto done;
-	}
-
-	addr = (u64) page_address(page);
-	if (addr)
-		addr += offset;
-	/* TODO: handle highmem pages */
-
-done:
-	return addr;
-}
-
-static void ipath_dma_unmap_page(struct ib_device *dev,
-				 u64 addr, size_t size,
-				 enum dma_data_direction direction)
-{
-	BUG_ON(!valid_dma_direction(direction));
-}
-
-static int ipath_map_sg(struct ib_device *dev, struct scatterlist *sgl,
-			int nents, enum dma_data_direction direction)
-{
-	struct scatterlist *sg;
-	u64 addr;
-	int i;
-	int ret = nents;
-
-	BUG_ON(!valid_dma_direction(direction));
-
-	for_each_sg(sgl, sg, nents, i) {
-		addr = (u64) page_address(sg_page(sg));
-		/* TODO: handle highmem pages */
-		if (!addr) {
-			ret = 0;
-			break;
-		}
-		sg->dma_address = addr + sg->offset;
-#ifdef CONFIG_NEED_SG_DMA_LENGTH
-		sg->dma_length = sg->length;
-#endif
-	}
-	return ret;
-}
-
-static void ipath_unmap_sg(struct ib_device *dev,
-			   struct scatterlist *sg, int nents,
-			   enum dma_data_direction direction)
-{
-	BUG_ON(!valid_dma_direction(direction));
-}
-
-static void ipath_sync_single_for_cpu(struct ib_device *dev,
-				      u64 addr,
-				      size_t size,
-				      enum dma_data_direction dir)
-{
-}
-
-static void ipath_sync_single_for_device(struct ib_device *dev,
-					 u64 addr,
-					 size_t size,
-					 enum dma_data_direction dir)
-{
-}
-
-static void *ipath_dma_alloc_coherent(struct ib_device *dev, size_t size,
-				      u64 *dma_handle, gfp_t flag)
-{
-	struct page *p;
-	void *addr = NULL;
-
-	p = alloc_pages(flag, get_order(size));
-	if (p)
-		addr = page_address(p);
-	if (dma_handle)
-		*dma_handle = (u64) addr;
-	return addr;
-}
-
-static void ipath_dma_free_coherent(struct ib_device *dev, size_t size,
-				    void *cpu_addr, u64 dma_handle)
-{
-	free_pages((unsigned long) cpu_addr, get_order(size));
-}
-
-struct ib_dma_mapping_ops ipath_dma_mapping_ops = {
-	.mapping_error = ipath_mapping_error,
-	.map_single = ipath_dma_map_single,
-	.unmap_single = ipath_dma_unmap_single,
-	.map_page = ipath_dma_map_page,
-	.unmap_page = ipath_dma_unmap_page,
-	.map_sg = ipath_map_sg,
-	.unmap_sg = ipath_unmap_sg,
-	.sync_single_for_cpu = ipath_sync_single_for_cpu,
-	.sync_single_for_device = ipath_sync_single_for_device,
-	.alloc_coherent = ipath_dma_alloc_coherent,
-	.free_coherent = ipath_dma_free_coherent
-};

drivers/staging/rdma/ipath/ipath_fs.c

-/*
- * Copyright (c) 2006, 2007 QLogic Corporation. All rights reserved.
- * Copyright (c) 2006 PathScale, Inc. All rights reserved.
- *
- * This software is available to you under a choice of one of two
- * licenses.  You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * OpenIB.org BSD license below:
- *
- *     Redistribution and use in source and binary forms, with or
- *     without modification, are permitted provided that the following
- *     conditions are met:
- *
- *      - Redistributions of source code must retain the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer.
- *
- *      - Redistributions in binary form must reproduce the above
- *        copyright notice, this list of conditions and the following
- *        disclaimer in the documentation and/or other materials
- *        provided with the distribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/mount.h>
-#include <linux/pagemap.h>
-#include <linux/init.h>
-#include <linux/namei.h>
-#include <linux/slab.h>
-
-#include "ipath_kernel.h"
-
-#define IPATHFS_MAGIC 0x726a77
-
-static struct super_block *ipath_super;
-
-static int ipathfs_mknod(struct inode *dir, struct dentry *dentry,
-			 umode_t mode, const struct file_operations *fops,
-			 void *data)
-{
-	int error;
-	struct inode *inode = new_inode(dir->i_sb);
-
-	if (!inode) {
-		error = -EPERM;
-		goto bail;
-	}
-
-	inode->i_ino = get_next_ino();
-	inode->i_mode = mode;
-	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
-	inode->i_private = data;
-	if (S_ISDIR(mode)) {
-		inode->i_op = &simple_dir_inode_operations;
-		inc_nlink(inode);
-		inc_nlink(dir);
-	}
-
-	inode->i_fop = fops;
-
-	d_instantiate(dentry, inode);
-	error = 0;
-
-bail:
-	return error;
-}
-
-static int create_file(const char *name, umode_t mode,
-		       struct dentry *parent, struct dentry **dentry,
-		       const struct file_operations *fops, void *data)
-{
-	int error;
-
-	inode_lock(d_inode(parent));
-	*dentry = lookup_one_len(name, parent, strlen(name));
-	if (!IS_ERR(*dentry))
-		error = ipathfs_mknod(d_inode(parent), *dentry,
-				      mode, fops, data);
-	else
-		error = PTR_ERR(*dentry);
-	inode_unlock(d_inode(parent));
-
-	return error;
-}
-
-static ssize_t atomic_stats_read(struct file *file, char __user *buf,
-				 size_t count, loff_t *ppos)
-{
-	return simple_read_from_buffer(buf, count, ppos, &ipath_stats,
-				       sizeof ipath_stats);
-}
-
-static const struct file_operations atomic_stats_ops = {
-	.read = atomic_stats_read,
-	.llseek = default_llseek,
-};
-
-static ssize_t atomic_counters_read(struct file *file, char __user *buf,
-				    size_t count, loff_t *ppos)
-{
-	struct infinipath_counters counters;
-	struct ipath_devdata *dd;
-
-	dd = file_inode(file)->i_private;
-	dd->ipath_f_read_counters(dd, &counters);
-
-	return simple_read_from_buffer(buf, count, ppos, &counters,
-				       sizeof counters);
-}
-
-static const struct file_operations atomic_counters_ops = {
-	.read = atomic_counters_read,
-	.llseek = default_llseek,
-};
-
-static ssize_t flash_read(struct file *file, char __user *buf,
-			  size_t count, loff_t *ppos)
-{
-	struct ipath_devdata *dd;
-	ssize_t ret;
-	loff_t pos;
-	char *tmp;
-
-	pos = *ppos;
-
-	if ( pos < 0) {
-		ret = -EINVAL;
-		goto bail;
-	}
-
-	if (pos >= sizeof(struct ipath_flash)) {
-		ret = 0;
-		goto bail;
-	}
-
-	if (count > sizeof(struct ipath_flash) - pos)
-		count = sizeof(struct ipath_flash) - pos;
-
-	tmp = kmalloc(count, GFP_KERNEL);
-	if (!tmp) {
-		ret = -ENOMEM;
-		goto bail;
-	}
-
-	dd = file_inode(file)->i_private;
-	if (ipath_eeprom_read(dd, pos, tmp, count)) {
-		ipath_dev_err(dd, "failed to read from flash\n");
-		ret = -ENXIO;
-		goto bail_tmp;
-	}
-
-	if (copy_to_user(buf, tmp, count)) {
-		ret = -EFAULT;
-		goto bail_tmp;
-	}
-
-	*ppos = pos + count;
-	ret = count;
-
-bail_tmp:
-	kfree(tmp);
-
-bail:
-	return ret;
-}
-
-static ssize_t flash_write(struct file *file, const char __user *buf,
-			   size_t count, loff_t *ppos)
-{
-	struct ipath_devdata *dd;
-	ssize_t ret;
-	loff_t pos;
-	char *tmp;
-
-	pos = *ppos;
-
-	if (pos != 0) {
-		ret = -EINVAL;
-		goto bail;
-	}
-
-	if (count != sizeof(struct ipath_flash)) {
-		ret = -EINVAL;
-		goto bail;
-	}
-
-	tmp = memdup_user(buf, count);
-	if (IS_ERR(tmp))
-		return PTR_ERR(tmp);
-
-	dd = file_inode(file)->i_private;
-	if (ipath_eeprom_write(dd, pos, tmp, count)) {
-		ret = -ENXIO;
-		ipath_dev_err(dd, "failed to write to flash\n");
-		goto bail_tmp;
-	}
-
-	*ppos = pos + count;
-	ret = count;
-
-bail_tmp:
-	kfree(tmp);
-
-bail:
-	return ret;
-}
-
-static const struct file_operations flash_ops = {
-	.read = flash_read,
-	.write = flash_write,
-	.llseek = default_llseek,
-};
-
-static int create_device_files(struct super_block *sb,
-			       struct ipath_devdata *dd)
-{
-	struct dentry *dir, *tmp;
-	char unit[10];
-	int ret;
-
-	snprintf(unit, sizeof unit, "%02d", dd->ipath_unit);
-	ret = create_file(unit, S_IFDIR|S_IRUGO|S_IXUGO, sb->s_root, &dir,
-			  &simple_dir_operations, dd);
-	if (ret) {
-		printk(KERN_ERR "create_file(%s) failed: %d\n", unit, ret);
-		goto bail;
-	}
-
-	ret = create_file("atomic_counters", S_IFREG|S_IRUGO, dir, &tmp,
-			  &atomic_counters_ops, dd);
-	if (ret) {
-		printk(KERN_ERR "create_file(%s/atomic_counters) "
-		       "failed: %d\n", unit, ret);
-		goto bail;
-	}
-
-	ret = create_file("flash", S_IFREG|S_IWUSR|S_IRUGO, dir, &tmp,
-			  &flash_ops, dd);
-	if (ret) {
-		printk(KERN_ERR "create_file(%s/flash) "
-		       "failed: %d\n", unit, ret);
-		goto bail;
-	}
-
-bail:
-	return ret;
-}
-
-static int remove_file(struct dentry *parent, char *name)
-{
-	struct dentry *tmp;
-	int ret;
-
-	tmp = lookup_one_len(name, parent, strlen(name));
-
-	if (IS_ERR(tmp)) {
-		ret = PTR_ERR(tmp);
-		goto bail;
-	}
-
-	spin_lock(&tmp->d_lock);
-	if (simple_positive(tmp)) {
-		dget_dlock(tmp);
-		__d_drop(tmp);
-		spin_unlock(&tmp->d_lock);
-		simple_unlink(d_inode(parent), tmp);
-	} else
-		spin_unlock(&tmp->d_lock);
-
-	ret = 0;
-bail:
-	/*
-	 * We don't expect clients to care about the return value, but
-	 * it's there if they need it.
-	 */
-	return ret;
-}
-
-static int remove_device_files(struct super_block *sb,
-			       struct ipath_devdata *dd)
-{
-	struct dentry *dir, *root;
-	char unit[10];
-	int ret;
-
-	root = dget(sb->s_root);
-	inode_lock(d_inode(root));
-	snprintf(unit, sizeof unit, "%02d", dd->ipath_unit);
-	dir = lookup_one_len(unit, root, strlen(unit));
-
-	if (IS_ERR(dir)) {
-		ret = PTR_ERR(dir);
-		printk(KERN_ERR "Lookup of %s failed\n", unit);
-		goto bail;
-	}
-
-	remove_file(dir, "flash");
-	remove_file(dir, "atomic_counters");
-	d_delete(dir);
-	ret = simple_rmdir(d_inode(root), dir);
-
-bail:
-	inode_unlock(d_inode(root));
-	dput(root);
-	return ret;
-}
-
-static int ipathfs_fill_super(struct super_block *sb, void *data,
-			      int silent)
-{
-	struct ipath_devdata *dd, *tmp;
-	unsigned long flags;
-	int ret;
-
-	static struct tree_descr files[] = {
-		[2] = {"atomic_stats", &atomic_stats_ops, S_IRUGO},
-		{""},
-	};
-
-	ret = simple_fill_super(sb, IPATHFS_MAGIC, files);
-	if (ret) {
-		printk(KERN_ERR "simple_fill_super failed: %d\n", ret);
-		goto bail;
-	}
-
-	spin_lock_irqsave(&ipath_devs_lock, flags);
-
-	list_for_each_entry_safe(dd, tmp, &ipath_dev_list, ipath_list) {
-		spin_unlock_irqrestore(&ipath_devs_lock, flags);
-		ret = create_device_files(sb, dd);
-		if (ret)
-			goto bail;
-		spin_lock_irqsave(&ipath_devs_lock, flags);
-	}
-
-	spin_unlock_irqrestore(&ipath_devs_lock, flags);
-
-bail:
-	return ret;
-}
-
-static struct dentry *ipathfs_mount(struct file_system_type *fs_type,
-			int flags, const char *dev_name, void *data)
-{
-	struct dentry *ret;
-	ret = mount_single(fs_type, flags, data, ipathfs_fill_super);
-	if (!IS_ERR(ret))
-		ipath_super = ret->d_sb;
-	return ret;
-}
-
-static void ipathfs_kill_super(struct super_block *s)
-{
-	kill_litter_super(s);
-	ipath_super = NULL;
-}
-
-int ipathfs_add_device(struct ipath_devdata *dd)
-{
-	int ret;
-
-	if (ipath_super == NULL) {
-		ret = 0;
-		goto bail;
-	}
-
-	ret = create_device_files(ipath_super, dd);
-
-bail:
-	return ret;
-}
-
-int ipathfs_remove_device(struct ipath_devdata *dd)
-{
-	int ret;
-
-	if (ipath_super == NULL) {
-		ret = 0;
-		goto bail;
-	}
-
-	ret = remove_device_files(ipath_super, dd);
-
-bail:
-	return ret;
-}
-
-static struct file_system_type ipathfs_fs_type = {
-	.owner =	THIS_MODULE,
-	.name =		"ipathfs",
-	.mount =	ipathfs_mount,
-	.kill_sb =	ipathfs_kill_super,
-};
-MODULE_ALIAS_FS("ipathfs");
-
-int __init ipath_init_ipathfs(void)
-{
-	return register_filesystem(&ipathfs_fs_type);
-}
-
-void __exit ipath_exit_ipathfs(void)
-{
-	unregister_filesystem(&ipathfs_fs_type);
-}