418 lines
11 KiB
C
418 lines
11 KiB
C
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/*
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* Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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/* Crude resource management */
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#include <linux/kernel.h>
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#include <linux/random.h>
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#include <linux/slab.h>
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#include <linux/kfifo.h>
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#include <linux/spinlock.h>
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#include <linux/errno.h>
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#include <linux/genalloc.h>
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#include "iw_cxgb4.h"
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#define RANDOM_SIZE 16
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static int __c4iw_init_resource_fifo(struct kfifo *fifo,
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spinlock_t *fifo_lock,
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u32 nr, u32 skip_low,
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u32 skip_high,
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int random)
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{
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u32 i, j, entry = 0, idx;
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u32 random_bytes;
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u32 rarray[16];
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spin_lock_init(fifo_lock);
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if (kfifo_alloc(fifo, nr * sizeof(u32), GFP_KERNEL))
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return -ENOMEM;
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for (i = 0; i < skip_low + skip_high; i++)
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kfifo_in(fifo, (unsigned char *) &entry, sizeof(u32));
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if (random) {
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j = 0;
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random_bytes = random32();
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for (i = 0; i < RANDOM_SIZE; i++)
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rarray[i] = i + skip_low;
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for (i = skip_low + RANDOM_SIZE; i < nr - skip_high; i++) {
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if (j >= RANDOM_SIZE) {
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j = 0;
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random_bytes = random32();
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}
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idx = (random_bytes >> (j * 2)) & 0xF;
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kfifo_in(fifo,
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(unsigned char *) &rarray[idx],
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sizeof(u32));
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rarray[idx] = i;
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j++;
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}
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for (i = 0; i < RANDOM_SIZE; i++)
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kfifo_in(fifo,
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(unsigned char *) &rarray[i],
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sizeof(u32));
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} else
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for (i = skip_low; i < nr - skip_high; i++)
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kfifo_in(fifo, (unsigned char *) &i, sizeof(u32));
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for (i = 0; i < skip_low + skip_high; i++)
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if (kfifo_out_locked(fifo, (unsigned char *) &entry,
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sizeof(u32), fifo_lock))
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break;
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return 0;
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}
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static int c4iw_init_resource_fifo(struct kfifo *fifo, spinlock_t * fifo_lock,
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u32 nr, u32 skip_low, u32 skip_high)
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{
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return __c4iw_init_resource_fifo(fifo, fifo_lock, nr, skip_low,
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skip_high, 0);
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}
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static int c4iw_init_resource_fifo_random(struct kfifo *fifo,
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spinlock_t *fifo_lock,
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u32 nr, u32 skip_low, u32 skip_high)
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{
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return __c4iw_init_resource_fifo(fifo, fifo_lock, nr, skip_low,
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skip_high, 1);
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}
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static int c4iw_init_qid_fifo(struct c4iw_rdev *rdev)
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{
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u32 i;
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spin_lock_init(&rdev->resource.qid_fifo_lock);
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if (kfifo_alloc(&rdev->resource.qid_fifo, T4_MAX_QIDS * sizeof(u32),
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GFP_KERNEL))
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return -ENOMEM;
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for (i = T4_QID_BASE; i < T4_QID_BASE + T4_MAX_QIDS; i++)
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if (!(i & rdev->qpmask))
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kfifo_in(&rdev->resource.qid_fifo,
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(unsigned char *) &i, sizeof(u32));
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return 0;
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}
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/* nr_* must be power of 2 */
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int c4iw_init_resource(struct c4iw_rdev *rdev, u32 nr_tpt, u32 nr_pdid)
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{
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int err = 0;
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err = c4iw_init_resource_fifo_random(&rdev->resource.tpt_fifo,
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&rdev->resource.tpt_fifo_lock,
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nr_tpt, 1, 0);
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if (err)
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goto tpt_err;
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err = c4iw_init_qid_fifo(rdev);
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if (err)
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goto qid_err;
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err = c4iw_init_resource_fifo(&rdev->resource.pdid_fifo,
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&rdev->resource.pdid_fifo_lock,
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nr_pdid, 1, 0);
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if (err)
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goto pdid_err;
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return 0;
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pdid_err:
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kfifo_free(&rdev->resource.qid_fifo);
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qid_err:
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kfifo_free(&rdev->resource.tpt_fifo);
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tpt_err:
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return -ENOMEM;
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}
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/*
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* returns 0 if no resource available
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*/
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u32 c4iw_get_resource(struct kfifo *fifo, spinlock_t *lock)
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{
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u32 entry;
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if (kfifo_out_locked(fifo, (unsigned char *) &entry, sizeof(u32), lock))
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return entry;
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else
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return 0;
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}
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void c4iw_put_resource(struct kfifo *fifo, u32 entry, spinlock_t *lock)
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{
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PDBG("%s entry 0x%x\n", __func__, entry);
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kfifo_in_locked(fifo, (unsigned char *) &entry, sizeof(u32), lock);
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}
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u32 c4iw_get_cqid(struct c4iw_rdev *rdev, struct c4iw_dev_ucontext *uctx)
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{
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struct c4iw_qid_list *entry;
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u32 qid;
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int i;
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mutex_lock(&uctx->lock);
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if (!list_empty(&uctx->cqids)) {
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entry = list_entry(uctx->cqids.next, struct c4iw_qid_list,
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entry);
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list_del(&entry->entry);
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qid = entry->qid;
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kfree(entry);
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} else {
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qid = c4iw_get_resource(&rdev->resource.qid_fifo,
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&rdev->resource.qid_fifo_lock);
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if (!qid)
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goto out;
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for (i = qid+1; i & rdev->qpmask; i++) {
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entry = kmalloc(sizeof *entry, GFP_KERNEL);
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if (!entry)
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goto out;
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entry->qid = i;
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list_add_tail(&entry->entry, &uctx->cqids);
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}
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/*
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* now put the same ids on the qp list since they all
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* map to the same db/gts page.
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*/
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entry = kmalloc(sizeof *entry, GFP_KERNEL);
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if (!entry)
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goto out;
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entry->qid = qid;
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list_add_tail(&entry->entry, &uctx->qpids);
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for (i = qid+1; i & rdev->qpmask; i++) {
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entry = kmalloc(sizeof *entry, GFP_KERNEL);
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if (!entry)
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goto out;
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entry->qid = i;
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list_add_tail(&entry->entry, &uctx->qpids);
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}
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}
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out:
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mutex_unlock(&uctx->lock);
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PDBG("%s qid 0x%x\n", __func__, qid);
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return qid;
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}
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void c4iw_put_cqid(struct c4iw_rdev *rdev, u32 qid,
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struct c4iw_dev_ucontext *uctx)
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{
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struct c4iw_qid_list *entry;
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entry = kmalloc(sizeof *entry, GFP_KERNEL);
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if (!entry)
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return;
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PDBG("%s qid 0x%x\n", __func__, qid);
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entry->qid = qid;
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mutex_lock(&uctx->lock);
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list_add_tail(&entry->entry, &uctx->cqids);
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mutex_unlock(&uctx->lock);
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}
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u32 c4iw_get_qpid(struct c4iw_rdev *rdev, struct c4iw_dev_ucontext *uctx)
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{
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struct c4iw_qid_list *entry;
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u32 qid;
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int i;
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mutex_lock(&uctx->lock);
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if (!list_empty(&uctx->qpids)) {
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entry = list_entry(uctx->qpids.next, struct c4iw_qid_list,
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entry);
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list_del(&entry->entry);
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qid = entry->qid;
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kfree(entry);
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} else {
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qid = c4iw_get_resource(&rdev->resource.qid_fifo,
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&rdev->resource.qid_fifo_lock);
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if (!qid)
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goto out;
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for (i = qid+1; i & rdev->qpmask; i++) {
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entry = kmalloc(sizeof *entry, GFP_KERNEL);
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if (!entry)
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goto out;
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entry->qid = i;
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list_add_tail(&entry->entry, &uctx->qpids);
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}
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/*
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* now put the same ids on the cq list since they all
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* map to the same db/gts page.
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*/
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entry = kmalloc(sizeof *entry, GFP_KERNEL);
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if (!entry)
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goto out;
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entry->qid = qid;
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list_add_tail(&entry->entry, &uctx->cqids);
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for (i = qid; i & rdev->qpmask; i++) {
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entry = kmalloc(sizeof *entry, GFP_KERNEL);
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if (!entry)
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goto out;
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entry->qid = i;
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list_add_tail(&entry->entry, &uctx->cqids);
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}
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}
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out:
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mutex_unlock(&uctx->lock);
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PDBG("%s qid 0x%x\n", __func__, qid);
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return qid;
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}
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void c4iw_put_qpid(struct c4iw_rdev *rdev, u32 qid,
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struct c4iw_dev_ucontext *uctx)
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{
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struct c4iw_qid_list *entry;
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entry = kmalloc(sizeof *entry, GFP_KERNEL);
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if (!entry)
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return;
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PDBG("%s qid 0x%x\n", __func__, qid);
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entry->qid = qid;
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mutex_lock(&uctx->lock);
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list_add_tail(&entry->entry, &uctx->qpids);
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mutex_unlock(&uctx->lock);
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}
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void c4iw_destroy_resource(struct c4iw_resource *rscp)
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{
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kfifo_free(&rscp->tpt_fifo);
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kfifo_free(&rscp->qid_fifo);
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kfifo_free(&rscp->pdid_fifo);
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}
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/*
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* PBL Memory Manager. Uses Linux generic allocator.
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*/
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#define MIN_PBL_SHIFT 8 /* 256B == min PBL size (32 entries) */
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u32 c4iw_pblpool_alloc(struct c4iw_rdev *rdev, int size)
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{
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unsigned long addr = gen_pool_alloc(rdev->pbl_pool, size);
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PDBG("%s addr 0x%x size %d\n", __func__, (u32)addr, size);
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return (u32)addr;
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}
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void c4iw_pblpool_free(struct c4iw_rdev *rdev, u32 addr, int size)
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{
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PDBG("%s addr 0x%x size %d\n", __func__, addr, size);
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gen_pool_free(rdev->pbl_pool, (unsigned long)addr, size);
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}
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int c4iw_pblpool_create(struct c4iw_rdev *rdev)
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{
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unsigned pbl_start, pbl_chunk, pbl_top;
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rdev->pbl_pool = gen_pool_create(MIN_PBL_SHIFT, -1);
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if (!rdev->pbl_pool)
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return -ENOMEM;
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pbl_start = rdev->lldi.vr->pbl.start;
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pbl_chunk = rdev->lldi.vr->pbl.size;
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pbl_top = pbl_start + pbl_chunk;
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while (pbl_start < pbl_top) {
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pbl_chunk = min(pbl_top - pbl_start + 1, pbl_chunk);
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if (gen_pool_add(rdev->pbl_pool, pbl_start, pbl_chunk, -1)) {
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PDBG("%s failed to add PBL chunk (%x/%x)\n",
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__func__, pbl_start, pbl_chunk);
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if (pbl_chunk <= 1024 << MIN_PBL_SHIFT) {
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printk(KERN_WARNING MOD
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"Failed to add all PBL chunks (%x/%x)\n",
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pbl_start,
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pbl_top - pbl_start);
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return 0;
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}
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pbl_chunk >>= 1;
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} else {
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PDBG("%s added PBL chunk (%x/%x)\n",
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__func__, pbl_start, pbl_chunk);
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pbl_start += pbl_chunk;
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}
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}
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return 0;
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}
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void c4iw_pblpool_destroy(struct c4iw_rdev *rdev)
|
||
|
|
{
|
||
|
|
gen_pool_destroy(rdev->pbl_pool);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* RQT Memory Manager. Uses Linux generic allocator.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define MIN_RQT_SHIFT 10 /* 1KB == min RQT size (16 entries) */
|
||
|
|
|
||
|
|
u32 c4iw_rqtpool_alloc(struct c4iw_rdev *rdev, int size)
|
||
|
|
{
|
||
|
|
unsigned long addr = gen_pool_alloc(rdev->rqt_pool, size << 6);
|
||
|
|
PDBG("%s addr 0x%x size %d\n", __func__, (u32)addr, size << 6);
|
||
|
|
return (u32)addr;
|
||
|
|
}
|
||
|
|
|
||
|
|
void c4iw_rqtpool_free(struct c4iw_rdev *rdev, u32 addr, int size)
|
||
|
|
{
|
||
|
|
PDBG("%s addr 0x%x size %d\n", __func__, addr, size << 6);
|
||
|
|
gen_pool_free(rdev->rqt_pool, (unsigned long)addr, size << 6);
|
||
|
|
}
|
||
|
|
|
||
|
|
int c4iw_rqtpool_create(struct c4iw_rdev *rdev)
|
||
|
|
{
|
||
|
|
unsigned rqt_start, rqt_chunk, rqt_top;
|
||
|
|
|
||
|
|
rdev->rqt_pool = gen_pool_create(MIN_RQT_SHIFT, -1);
|
||
|
|
if (!rdev->rqt_pool)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
rqt_start = rdev->lldi.vr->rq.start;
|
||
|
|
rqt_chunk = rdev->lldi.vr->rq.size;
|
||
|
|
rqt_top = rqt_start + rqt_chunk;
|
||
|
|
|
||
|
|
while (rqt_start < rqt_top) {
|
||
|
|
rqt_chunk = min(rqt_top - rqt_start + 1, rqt_chunk);
|
||
|
|
if (gen_pool_add(rdev->rqt_pool, rqt_start, rqt_chunk, -1)) {
|
||
|
|
PDBG("%s failed to add RQT chunk (%x/%x)\n",
|
||
|
|
__func__, rqt_start, rqt_chunk);
|
||
|
|
if (rqt_chunk <= 1024 << MIN_RQT_SHIFT) {
|
||
|
|
printk(KERN_WARNING MOD
|
||
|
|
"Failed to add all RQT chunks (%x/%x)\n",
|
||
|
|
rqt_start, rqt_top - rqt_start);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
rqt_chunk >>= 1;
|
||
|
|
} else {
|
||
|
|
PDBG("%s added RQT chunk (%x/%x)\n",
|
||
|
|
__func__, rqt_start, rqt_chunk);
|
||
|
|
rqt_start += rqt_chunk;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void c4iw_rqtpool_destroy(struct c4iw_rdev *rdev)
|
||
|
|
{
|
||
|
|
gen_pool_destroy(rdev->rqt_pool);
|
||
|
|
}
|