[PATCH 11/13] Core Resource Allocation

Steve Wise
2006-11-16T03:59:47Z

Core functions to carve up adapter memory, stag, qp, and cq IDs.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
---

drivers/infiniband/hw/cxgb3/core/cxio_resource.c | 357 ++++++++++++++++++++++
drivers/infiniband/hw/cxgb3/core/cxio_resource.h | 70 ++++
2 files changed, 427 insertions(+), 0 deletions(-)

diff --git a/drivers/infiniband/hw/cxgb3/core/cxio_resource.c b/drivers/infiniband/hw/cxgb3/core/cxio_resource.c
new file mode 100644
index 0000000..ada44b9
--- /dev/null
+++ b/drivers/infiniband/hw/cxgb3/core/cxio_resource.c
@@ -0,0 +1,357 @@
+/*
+ * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
+ * Copyright (c) 2006 Open Grid Computing, 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.
+ */
+/* Crude resource management */
+#include <linux/kernel.h>
+#include <linux/random.h>
+#include <linux/slab.h>
+#include <linux/kfifo.h>
+#include <linux/spinlock.h>
+#include <linux/errno.h>
+#include "cxio_resource.h"
+#include "cxio_hal.h"
+
+static struct kfifo *rhdl_fifo;
+static spinlock_t rhdl_fifo_lock;
+
+#define RANDOM_SIZE 16
+
+
+/* Loosely based on the Mersenne twister algorithm */
+static u32 next_random(u32 rand)
+{
+ u32 y, ylast;
+
+ y = rand;
+ ylast = y;
+ y = (y * 69069) & 0xffffffff;
+ y = (y & 0x80000000) + (ylast & 0x7fffffff);
+ if ((y & 1))
+ y = ylast ^ (y > 1) ^ (2567483615UL);
+ else
+ y = ylast ^ (y > 1);
+ y = y ^ (y >> 11);
+ y = y ^ ((y >> 7) & 2636928640UL);
+ y = y ^ ((y >> 15) & 4022730752UL);
+ y = y ^ (y << 18);
+ return y;
+}
+static int __cxio_init_resource_fifo(struct kfifo **fifo,
+ spinlock_t *fifo_lock,
+ u32 nr, u32 skip_low,
+ u32 skip_high,
+ int random)
+{
+ u32 i, j, entry = 0, idx;
+ u32 random_bytes;
+ u32 rarray[16];
+ spin_lock_init(fifo_lock);
+
+ *fifo = kfifo_alloc(nr * sizeof(u32), GFP_KERNEL, fifo_lock);
+ if (IS_ERR(*fifo))
+ return -ENOMEM;
+
+ for (i = 0; i < skip_low + skip_high; i++)
+ __kfifo_put(*fifo, (unsigned char *) &entry, sizeof(u32));
+ if (random) {
+ j = 0;
+ get_random_bytes(&random_bytes,sizeof(random_bytes));
+ for (i = 0; i < RANDOM_SIZE; i++)
+ rarray[i] = i + skip_low;
+ for (i = skip_low + RANDOM_SIZE; i < nr - skip_high; i++) {
+ if (j >= RANDOM_SIZE) {
+ j = 0;
+ random_bytes = next_random(random_bytes);
+ }
+ idx = (random_bytes >> (j * 2)) & 0xF;
+ __kfifo_put(*fifo,
+ (unsigned char *) &rarray[idx],
+ sizeof(u32));
+ rarray[idx] = i;
+ j++;
+ }
+ for (i = 0; i < RANDOM_SIZE; i++)
+ __kfifo_put(*fifo,
+ (unsigned char *) &rarray[i],
+ sizeof(u32));
+ } else
+ for (i = skip_low; i < nr - skip_high; i++)
+ __kfifo_put(*fifo, (unsigned char *) &i, sizeof(u32));
+
+ for (i = 0; i < skip_low + skip_high; i++)
+ kfifo_get(*fifo, (unsigned char *) &entry, sizeof(u32));
+ return 0;
+}
+
+static int cxio_init_resource_fifo(struct kfifo **fifo, spinlock_t * fifo_lock,
+ u32 nr, u32 skip_low, u32 skip_high)
+{
+ return (__cxio_init_resource_fifo(fifo, fifo_lock, nr, skip_low,
+ skip_high, 0));
+}
+
+static int cxio_init_resource_fifo_random(struct kfifo **fifo,
+ spinlock_t * fifo_lock,
+ u32 nr, u32 skip_low, u32 skip_high)
+{
+
+ return (__cxio_init_resource_fifo(fifo, fifo_lock, nr, skip_low,
+ skip_high, 1));
+}
+
+static int cxio_init_qpid_fifo(struct cxio_rdev *rdev_p)
+{
+ u32 i;
+
+ spin_lock_init(&rdev_p->rscp->qpid_fifo_lock);
+
+ rdev_p->rscp->qpid_fifo = kfifo_alloc(T3_MAX_NUM_QP * sizeof(u32),
+ GFP_KERNEL,
+ &rdev_p->rscp->qpid_fifo_lock);
+ if (IS_ERR(rdev_p->rscp->qpid_fifo))
+ return -ENOMEM;
+
+ for (i = 16; i < T3_MAX_NUM_QP; i++) {
+ if (!(i & rdev_p->qpmask))
+ __kfifo_put(rdev_p->rscp->qpid_fifo,
+ (unsigned char *) &i, sizeof(u32));
+ }
+ return 0;
+}
+
+int cxio_hal_init_rhdl_resource(u32 nr_rhdl)
+{
+ return cxio_init_resource_fifo(&rhdl_fifo, &rhdl_fifo_lock, nr_rhdl, 1,
+ 0);
+}
+
+void cxio_hal_destroy_rhdl_resource(void)
+{
+ kfifo_free(rhdl_fifo);
+}
+
+/* nr_* must be power of 2 */
+int cxio_hal_init_resource(struct cxio_rdev *rdev_p,
+ u32 nr_tpt, u32 nr_pbl,
+ u32 nr_rqt, u32 nr_qpid, u32 nr_cqid, u32 nr_pdid)
+{
+ int err = 0;
+ struct cxio_hal_resource *rscp;
+
+ rscp = kmalloc(sizeof(*rscp), GFP_KERNEL);
+ if (!rscp) {
+ return -ENOMEM;
+ }
+ rdev_p->rscp = rscp;
+ err = cxio_init_resource_fifo_random(&rscp->tpt_fifo,
+ &rscp->tpt_fifo_lock,
+ nr_tpt, 1, 0);
+ if (err)
+ goto tpt_err;
+ err = cxio_init_qpid_fifo(rdev_p);
+ if (err)
+ goto qpid_err;
+ err = cxio_init_resource_fifo(&rscp->cqid_fifo, &rscp->cqid_fifo_lock,
+ nr_cqid, 1, 0);
+ if (err)
+ goto cqid_err;
+ err = cxio_init_resource_fifo(&rscp->pdid_fifo, &rscp->pdid_fifo_lock,
+ nr_pdid, 1, 0);
+ if (err)
+ goto pdid_err;
+ return 0;
+pdid_err:
+ kfifo_free(rscp->cqid_fifo);
+cqid_err:
+ kfifo_free(rscp->qpid_fifo);
+qpid_err:
+ kfifo_free(rscp->tpt_fifo);
+tpt_err:
+ return -ENOMEM;
+}
+
+/*
+ * returns 0 if no resource available
+ */
+static inline u32 cxio_hal_get_resource(struct kfifo *fifo)
+{
+ u32 entry;
+ if (kfifo_get(fifo, (unsigned char *) &entry, sizeof(u32)))
+ return entry;
+ else
+ return 0; /* fifo emptry */
+}
+
+static inline void cxio_hal_put_resource(struct kfifo *fifo, u32 entry)
+{
+ BUG_ON(kfifo_put(fifo, (unsigned char *) &entry, sizeof(u32)) == 0);
+}
+
+u32 cxio_hal_get_rhdl(void)
+{
+ return cxio_hal_get_resource(rhdl_fifo);
+}
+
+void cxio_hal_put_rhdl(u32 rhdl)
+{
+ cxio_hal_put_resource(rhdl_fifo, rhdl);
+}
+
+u32 cxio_hal_get_stag(struct cxio_hal_resource *rscp)
+{
+ return cxio_hal_get_resource(rscp->tpt_fifo);
+}
+
+void cxio_hal_put_stag(struct cxio_hal_resource *rscp, u32 stag)
+{
+ cxio_hal_put_resource(rscp->tpt_fifo, stag);
+}
+
+u32 cxio_hal_get_qpid(struct cxio_hal_resource *rscp)
+{
+ u32 qpid = cxio_hal_get_resource(rscp->qpid_fifo);
+ PDBG("%s qpid 0x%x\n", __FUNCTION__, qpid);
+ return qpid;
+}
+
+void cxio_hal_put_qpid(struct cxio_hal_resource *rscp, u32 qpid)
+{
+ PDBG("%s qpid 0x%x\n", __FUNCTION__, qpid);
+ cxio_hal_put_resource(rscp->qpid_fifo, qpid);
+}
+
+u32 cxio_hal_get_cqid(struct cxio_hal_resource *rscp)
+{
+ return cxio_hal_get_resource(rscp->cqid_fifo);
+}
+
+void cxio_hal_put_cqid(struct cxio_hal_resource *rscp, u32 cqid)
+{
+ cxio_hal_put_resource(rscp->cqid_fifo, cqid);
+}
+
+u32 cxio_hal_get_pdid(struct cxio_hal_resource *rscp)
+{
+ return cxio_hal_get_resource(rscp->pdid_fifo);
+}
+
+void cxio_hal_put_pdid(struct cxio_hal_resource *rscp, u32 pdid)
+{
+ cxio_hal_put_resource(rscp->pdid_fifo, pdid);
+}
+
+void cxio_hal_destroy_resource(struct cxio_hal_resource *rscp)
+{
+ kfifo_free(rscp->tpt_fifo);
+ kfifo_free(rscp->cqid_fifo);
+ kfifo_free(rscp->qpid_fifo);
+ kfifo_free(rscp->pdid_fifo);
+ kfree(rscp);
+}
+
+/*
+ * PBL Memory Manager. Uses Linux generic allocator.
+ */
+
+#define MIN_PBL_SHIFT 8 /* 256B == min PBL size (32 entries) */
+#define PBL_CHUNK 2*1024*1024
+
+u32 cxio_hal_pblpool_alloc(struct cxio_rdev *rdev_p, int size)
+{
+ unsigned long addr = gen_pool_alloc(rdev_p->pbl_pool, size);
+ PDBG("%s addr 0x%x size %d\n", __FUNCTION__, (u32)addr, size);
+ return (u32)addr;
+}
+
+void cxio_hal_pblpool_free(struct cxio_rdev *rdev_p, u32 addr, int size)
+{
+ PDBG("%s addr 0x%x size %d\n", __FUNCTION__, addr, size);
+ gen_pool_free(rdev_p->pbl_pool, (unsigned long)addr, size);
+}
+
+int cxio_hal_pblpool_create(struct cxio_rdev *rdev_p)
+{
+ unsigned long i;
+ rdev_p->pbl_pool = gen_pool_create(MIN_PBL_SHIFT, -1);
+ if (rdev_p->pbl_pool) {
+ for (i = rdev_p->rnic_info.pbl_base;
+ i <= rdev_p->rnic_info.pbl_top - PBL_CHUNK + 1;
+ i += PBL_CHUNK) {
+ gen_pool_add(rdev_p->pbl_pool, i, PBL_CHUNK, -1);
+ }
+ }
+ return rdev_p->pbl_pool ? 0 : -ENOMEM;
+}
+
+void cxio_hal_pblpool_destroy(struct cxio_rdev *rdev_p)
+{
+ gen_pool_destroy(rdev_p->pbl_pool);
+}
+
+/*
+ * RQT Memory Manager. Uses Linux generic allocator.
+ */
+
+#define MIN_RQT_SHIFT 10 /* 1KB == mini RQT size (16 entries) */
+#define RQT_CHUNK 2*1024*1024
+
+u32 cxio_hal_rqtpool_alloc(struct cxio_rdev *rdev_p, int size)
+{
+ unsigned long addr = gen_pool_alloc(rdev_p->rqt_pool, size << 6);
+ PDBG("%s addr 0x%x size %d\n", __FUNCTION__, (u32)addr, size << 6);
+ return (u32)addr;
+}
+
+void cxio_hal_rqtpool_free(struct cxio_rdev *rdev_p, u32 addr, int size)
+{
+ PDBG("%s addr 0x%x size %d\n", __FUNCTION__, addr, size << 6);
+ gen_pool_free(rdev_p->rqt_pool, (unsigned long)addr, size << 6);
+}
+
+int cxio_hal_rqtpool_create(struct cxio_rdev *rdev_p)
+{
+ unsigned long i;
+ rdev_p->rqt_pool = gen_pool_create(MIN_RQT_SHIFT, -1);
+ if (rdev_p->rqt_pool) {
+ for (i = rdev_p->rnic_info.rqt_base;
+ i <= rdev_p->rnic_info.rqt_top - RQT_CHUNK + 1;
+ i += RQT_CHUNK) {
+ gen_pool_add(rdev_p->rqt_pool, i, RQT_CHUNK, -1);
+ }
+ }
+ return rdev_p->rqt_pool ? 0 : -ENOMEM;
+}
+
+void cxio_hal_rqtpool_destroy(struct cxio_rdev *rdev_p)
+{
+ gen_pool_destroy(rdev_p->rqt_pool);
+}
diff --git a/drivers/infiniband/hw/cxgb3/core/cxio_resource.h b/drivers/infiniband/hw/cxgb3/core/cxio_resource.h
new file mode 100644
index 0000000..a6bbe83
--- /dev/null
+++ b/drivers/infiniband/hw/cxgb3/core/cxio_resource.h
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
+ * Copyright (c) 2006 Open Grid Computing, 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 __CXIO_RESOURCE_H__
+#define __CXIO_RESOURCE_H__
+
+#include <linux/kernel.h>
+#include <linux/random.h>
+#include <linux/slab.h>
+#include <linux/kfifo.h>
+#include <linux/spinlock.h>
+#include <linux/errno.h>
+#include <linux/genalloc.h>
+#include "cxio_hal.h"
+
+extern int cxio_hal_init_rhdl_resource(u32 nr_rhdl);
+extern void cxio_hal_destroy_rhdl_resource(void);
+extern int cxio_hal_init_resource(struct cxio_rdev *rdev_p,
+ u32 nr_tpt, u32 nr_pbl,
+ u32 nr_rqt, u32 nr_qpid, u32 nr_cqid,
+ u32 nr_pdid);
+extern u32 cxio_hal_get_stag(struct cxio_hal_resource *rscp);
+extern void cxio_hal_put_stag(struct cxio_hal_resource *rscp, u32 stag);
+extern u32 cxio_hal_get_qpid(struct cxio_hal_resource *rscp);
+extern void cxio_hal_put_qpid(struct cxio_hal_resource *rscp, u32 qpid);
+extern u32 cxio_hal_get_cqid(struct cxio_hal_resource *rscp);
+extern void cxio_hal_put_cqid(struct cxio_hal_resource *rscp, u32 cqid);
+extern void cxio_hal_destroy_resource(struct cxio_hal_resource *rscp);
+
+#define PBL_OFF(rdev_p, a) ( (a) - (rdev_p)->rnic_info.pbl_base )
+extern int cxio_hal_pblpool_create(struct cxio_rdev *rdev_p);
+extern void cxio_hal_pblpool_destroy(struct cxio_rdev *rdev_p);
+extern u32 cxio_hal_pblpool_alloc(struct cxio_rdev *rdev_p, int size);
+extern void cxio_hal_pblpool_free(struct cxio_rdev *rdev_p, u32 addr, int size);
+
+#define RQT_OFF(rdev_p, a) ( (a) - (rdev_p)->rnic_info.rqt_base )
+extern int cxio_hal_rqtpool_create(struct cxio_rdev *rdev_p);
+extern void cxio_hal_rqtpool_destroy(struct cxio_rdev *rdev_p);
+extern u32 cxio_hal_rqtpool_alloc(struct cxio_rdev *rdev_p, int size);
+extern void cxio_hal_rqtpool_free(struct cxio_rdev *rdev_p, u32 addr, int size);
+#endif