Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 376 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/mthca/mthca_mcg.c b/drivers/infiniband/hw/mthca/mthca_mcg.c
new file mode 100644
index 000000000000..70a6553a588e
--- /dev/null
+++ b/drivers/infiniband/hw/mthca/mthca_mcg.c
@@ -0,0 +1,376 @@
+/*
+ * Copyright (c) 2004 Topspin Communications.  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.
+ *
+ * $Id: mthca_mcg.c 1349 2004-12-16 21:09:43Z roland $
+ */
+
+#include <linux/init.h>
+
+#include "mthca_dev.h"
+#include "mthca_cmd.h"
+
+enum {
+	MTHCA_QP_PER_MGM = 4 * (MTHCA_MGM_ENTRY_SIZE / 16 - 2)
+};
+
+struct mthca_mgm {
+	u32 next_gid_index;
+	u32 reserved[3];
+	u8  gid[16];
+	u32 qp[MTHCA_QP_PER_MGM];
+};
+
+static const u8 zero_gid[16];	/* automatically initialized to 0 */
+
+/*
+ * Caller must hold MCG table semaphore.  gid and mgm parameters must
+ * be properly aligned for command interface.
+ *
+ *  Returns 0 unless a firmware command error occurs.
+ *
+ * If GID is found in MGM or MGM is empty, *index = *hash, *prev = -1
+ * and *mgm holds MGM entry.
+ *
+ * if GID is found in AMGM, *index = index in AMGM, *prev = index of
+ * previous entry in hash chain and *mgm holds AMGM entry.
+ *
+ * If no AMGM exists for given gid, *index = -1, *prev = index of last
+ * entry in hash chain and *mgm holds end of hash chain.
+ */
+static int find_mgm(struct mthca_dev *dev,
+		    u8 *gid, struct mthca_mgm *mgm,
+		    u16 *hash, int *prev, int *index)
+{
+	void *mailbox;
+	u8 *mgid;
+	int err;
+	u8 status;
+
+	mailbox = kmalloc(16 + MTHCA_CMD_MAILBOX_EXTRA, GFP_KERNEL);
+	if (!mailbox)
+		return -ENOMEM;
+	mgid = MAILBOX_ALIGN(mailbox);
+
+	memcpy(mgid, gid, 16);
+
+	err = mthca_MGID_HASH(dev, mgid, hash, &status);
+	if (err)
+		goto out;
+	if (status) {
+		mthca_err(dev, "MGID_HASH returned status %02x\n", status);
+		err = -EINVAL;
+		goto out;
+	}
+
+	if (0)
+		mthca_dbg(dev, "Hash for %04x:%04x:%04x:%04x:"
+			  "%04x:%04x:%04x:%04x is %04x\n",
+			  be16_to_cpu(((u16 *) gid)[0]), be16_to_cpu(((u16 *) gid)[1]),
+			  be16_to_cpu(((u16 *) gid)[2]), be16_to_cpu(((u16 *) gid)[3]),
+			  be16_to_cpu(((u16 *) gid)[4]), be16_to_cpu(((u16 *) gid)[5]),
+			  be16_to_cpu(((u16 *) gid)[6]), be16_to_cpu(((u16 *) gid)[7]),
+			  *hash);
+
+	*index = *hash;
+	*prev  = -1;
+
+	do {
+		err = mthca_READ_MGM(dev, *index, mgm, &status);
+		if (err)
+			goto out;
+		if (status) {
+			mthca_err(dev, "READ_MGM returned status %02x\n", status);
+			return -EINVAL;
+		}
+
+		if (!memcmp(mgm->gid, zero_gid, 16)) {
+			if (*index != *hash) {
+				mthca_err(dev, "Found zero MGID in AMGM.\n");
+				err = -EINVAL;
+			}
+			goto out;
+		}
+
+		if (!memcmp(mgm->gid, gid, 16))
+			goto out;
+
+		*prev = *index;
+		*index = be32_to_cpu(mgm->next_gid_index) >> 5;
+	} while (*index);
+
+	*index = -1;
+
+ out:
+	kfree(mailbox);
+	return err;
+}
+
+int mthca_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
+{
+	struct mthca_dev *dev = to_mdev(ibqp->device);
+	void *mailbox;
+	struct mthca_mgm *mgm;
+	u16 hash;
+	int index, prev;
+	int link = 0;
+	int i;
+	int err;
+	u8 status;
+
+	mailbox = kmalloc(sizeof *mgm + MTHCA_CMD_MAILBOX_EXTRA, GFP_KERNEL);
+	if (!mailbox)
+		return -ENOMEM;
+	mgm = MAILBOX_ALIGN(mailbox);
+
+	if (down_interruptible(&dev->mcg_table.sem))
+		return -EINTR;
+
+	err = find_mgm(dev, gid->raw, mgm, &hash, &prev, &index);
+	if (err)
+		goto out;
+
+	if (index != -1) {
+		if (!memcmp(mgm->gid, zero_gid, 16))
+			memcpy(mgm->gid, gid->raw, 16);
+	} else {
+		link = 1;
+
+		index = mthca_alloc(&dev->mcg_table.alloc);
+		if (index == -1) {
+			mthca_err(dev, "No AMGM entries left\n");
+			err = -ENOMEM;
+			goto out;
+		}
+
+		err = mthca_READ_MGM(dev, index, mgm, &status);
+		if (err)
+			goto out;
+		if (status) {
+			mthca_err(dev, "READ_MGM returned status %02x\n", status);
+			err = -EINVAL;
+			goto out;
+		}
+
+		memcpy(mgm->gid, gid->raw, 16);
+		mgm->next_gid_index = 0;
+	}
+
+	for (i = 0; i < MTHCA_QP_PER_MGM; ++i)
+		if (!(mgm->qp[i] & cpu_to_be32(1 << 31))) {
+			mgm->qp[i] = cpu_to_be32(ibqp->qp_num | (1 << 31));
+			break;
+		}
+
+	if (i == MTHCA_QP_PER_MGM) {
+		mthca_err(dev, "MGM at index %x is full.\n", index);
+		err = -ENOMEM;
+		goto out;
+	}
+
+	err = mthca_WRITE_MGM(dev, index, mgm, &status);
+	if (err)
+		goto out;
+	if (status) {
+		mthca_err(dev, "WRITE_MGM returned status %02x\n", status);
+		err = -EINVAL;
+	}
+
+	if (!link)
+		goto out;
+
+	err = mthca_READ_MGM(dev, prev, mgm, &status);
+	if (err)
+		goto out;
+	if (status) {
+		mthca_err(dev, "READ_MGM returned status %02x\n", status);
+		err = -EINVAL;
+		goto out;
+	}
+
+	mgm->next_gid_index = cpu_to_be32(index << 5);
+
+	err = mthca_WRITE_MGM(dev, prev, mgm, &status);
+	if (err)
+		goto out;
+	if (status) {
+		mthca_err(dev, "WRITE_MGM returned status %02x\n", status);
+		err = -EINVAL;
+	}
+
+ out:
+	up(&dev->mcg_table.sem);
+	kfree(mailbox);
+	return err;
+}
+
+int mthca_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
+{
+	struct mthca_dev *dev = to_mdev(ibqp->device);
+	void *mailbox;
+	struct mthca_mgm *mgm;
+	u16 hash;
+	int prev, index;
+	int i, loc;
+	int err;
+	u8 status;
+
+	mailbox = kmalloc(sizeof *mgm + MTHCA_CMD_MAILBOX_EXTRA, GFP_KERNEL);
+	if (!mailbox)
+		return -ENOMEM;
+	mgm = MAILBOX_ALIGN(mailbox);
+
+	if (down_interruptible(&dev->mcg_table.sem))
+		return -EINTR;
+
+	err = find_mgm(dev, gid->raw, mgm, &hash, &prev, &index);
+	if (err)
+		goto out;
+
+	if (index == -1) {
+		mthca_err(dev, "MGID %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x "
+			  "not found\n",
+			  be16_to_cpu(((u16 *) gid->raw)[0]),
+			  be16_to_cpu(((u16 *) gid->raw)[1]),
+			  be16_to_cpu(((u16 *) gid->raw)[2]),
+			  be16_to_cpu(((u16 *) gid->raw)[3]),
+			  be16_to_cpu(((u16 *) gid->raw)[4]),
+			  be16_to_cpu(((u16 *) gid->raw)[5]),
+			  be16_to_cpu(((u16 *) gid->raw)[6]),
+			  be16_to_cpu(((u16 *) gid->raw)[7]));
+		err = -EINVAL;
+		goto out;
+	}
+
+	for (loc = -1, i = 0; i < MTHCA_QP_PER_MGM; ++i) {
+		if (mgm->qp[i] == cpu_to_be32(ibqp->qp_num | (1 << 31)))
+			loc = i;
+		if (!(mgm->qp[i] & cpu_to_be32(1 << 31)))
+			break;
+	}
+
+	if (loc == -1) {
+		mthca_err(dev, "QP %06x not found in MGM\n", ibqp->qp_num);
+		err = -EINVAL;
+		goto out;
+	}
+
+	mgm->qp[loc]   = mgm->qp[i - 1];
+	mgm->qp[i - 1] = 0;
+
+	err = mthca_WRITE_MGM(dev, index, mgm, &status);
+	if (err)
+		goto out;
+	if (status) {
+		mthca_err(dev, "WRITE_MGM returned status %02x\n", status);
+		err = -EINVAL;
+		goto out;
+	}
+
+	if (i != 1)
+		goto out;
+
+	goto out;
+
+	if (prev == -1) {
+		/* Remove entry from MGM */
+		if (be32_to_cpu(mgm->next_gid_index) >> 5) {
+			err = mthca_READ_MGM(dev,
+					     be32_to_cpu(mgm->next_gid_index) >> 5,
+					     mgm, &status);
+			if (err)
+				goto out;
+			if (status) {
+				mthca_err(dev, "READ_MGM returned status %02x\n",
+					  status);
+				err = -EINVAL;
+				goto out;
+			}
+		} else
+			memset(mgm->gid, 0, 16);
+
+		err = mthca_WRITE_MGM(dev, index, mgm, &status);
+		if (err)
+			goto out;
+		if (status) {
+			mthca_err(dev, "WRITE_MGM returned status %02x\n", status);
+			err = -EINVAL;
+			goto out;
+		}
+	} else {
+		/* Remove entry from AMGM */
+		index = be32_to_cpu(mgm->next_gid_index) >> 5;
+		err = mthca_READ_MGM(dev, prev, mgm, &status);
+		if (err)
+			goto out;
+		if (status) {
+			mthca_err(dev, "READ_MGM returned status %02x\n", status);
+			err = -EINVAL;
+			goto out;
+		}
+
+		mgm->next_gid_index = cpu_to_be32(index << 5);
+
+		err = mthca_WRITE_MGM(dev, prev, mgm, &status);
+		if (err)
+			goto out;
+		if (status) {
+			mthca_err(dev, "WRITE_MGM returned status %02x\n", status);
+			err = -EINVAL;
+			goto out;
+		}
+	}
+
+ out:
+	up(&dev->mcg_table.sem);
+	kfree(mailbox);
+	return err;
+}
+
+int __devinit mthca_init_mcg_table(struct mthca_dev *dev)
+{
+	int err;
+
+	err = mthca_alloc_init(&dev->mcg_table.alloc,
+			       dev->limits.num_amgms,
+			       dev->limits.num_amgms - 1,
+			       0);
+	if (err)
+		return err;
+
+	init_MUTEX(&dev->mcg_table.sem);
+
+	return 0;
+}
+
+void __devexit mthca_cleanup_mcg_table(struct mthca_dev *dev)
+{
+	mthca_alloc_cleanup(&dev->mcg_table.alloc);
+}