344 lines
9.2 KiB
C
344 lines
9.2 KiB
C
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/*
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* Copyright (c) 2006 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 "cxio_resource.h"
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#include "cxio_hal.h"
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static struct kfifo rhdl_fifo;
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static spinlock_t rhdl_fifo_lock;
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#define RANDOM_SIZE 16
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static int __cxio_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) != sizeof(u32))
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break;
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return 0;
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}
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static int cxio_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 (__cxio_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 cxio_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 (__cxio_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 cxio_init_qpid_fifo(struct cxio_rdev *rdev_p)
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{
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u32 i;
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spin_lock_init(&rdev_p->rscp->qpid_fifo_lock);
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if (kfifo_alloc(&rdev_p->rscp->qpid_fifo, T3_MAX_NUM_QP * sizeof(u32),
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GFP_KERNEL))
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return -ENOMEM;
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for (i = 16; i < T3_MAX_NUM_QP; i++)
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if (!(i & rdev_p->qpmask))
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kfifo_in(&rdev_p->rscp->qpid_fifo,
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(unsigned char *) &i, sizeof(u32));
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return 0;
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}
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int cxio_hal_init_rhdl_resource(u32 nr_rhdl)
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{
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return cxio_init_resource_fifo(&rhdl_fifo, &rhdl_fifo_lock, nr_rhdl, 1,
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0);
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}
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void cxio_hal_destroy_rhdl_resource(void)
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{
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kfifo_free(&rhdl_fifo);
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}
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/* nr_* must be power of 2 */
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int cxio_hal_init_resource(struct cxio_rdev *rdev_p,
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u32 nr_tpt, u32 nr_pbl,
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u32 nr_rqt, u32 nr_qpid, u32 nr_cqid, u32 nr_pdid)
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{
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int err = 0;
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struct cxio_hal_resource *rscp;
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rscp = kmalloc(sizeof(*rscp), GFP_KERNEL);
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if (!rscp)
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return -ENOMEM;
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rdev_p->rscp = rscp;
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err = cxio_init_resource_fifo_random(&rscp->tpt_fifo,
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&rscp->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 = cxio_init_qpid_fifo(rdev_p);
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if (err)
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goto qpid_err;
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err = cxio_init_resource_fifo(&rscp->cqid_fifo, &rscp->cqid_fifo_lock,
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nr_cqid, 1, 0);
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if (err)
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goto cqid_err;
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err = cxio_init_resource_fifo(&rscp->pdid_fifo, &rscp->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(&rscp->cqid_fifo);
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cqid_err:
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kfifo_free(&rscp->qpid_fifo);
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qpid_err:
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kfifo_free(&rscp->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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static u32 cxio_hal_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; /* fifo emptry */
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}
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static void cxio_hal_put_resource(struct kfifo *fifo, spinlock_t * lock,
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u32 entry)
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{
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BUG_ON(
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kfifo_in_locked(fifo, (unsigned char *) &entry, sizeof(u32), lock)
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== 0);
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}
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u32 cxio_hal_get_stag(struct cxio_hal_resource *rscp)
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{
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return cxio_hal_get_resource(&rscp->tpt_fifo, &rscp->tpt_fifo_lock);
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}
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void cxio_hal_put_stag(struct cxio_hal_resource *rscp, u32 stag)
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{
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cxio_hal_put_resource(&rscp->tpt_fifo, &rscp->tpt_fifo_lock, stag);
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}
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u32 cxio_hal_get_qpid(struct cxio_hal_resource *rscp)
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{
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u32 qpid = cxio_hal_get_resource(&rscp->qpid_fifo,
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&rscp->qpid_fifo_lock);
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PDBG("%s qpid 0x%x\n", __func__, qpid);
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return qpid;
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}
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void cxio_hal_put_qpid(struct cxio_hal_resource *rscp, u32 qpid)
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{
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PDBG("%s qpid 0x%x\n", __func__, qpid);
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cxio_hal_put_resource(&rscp->qpid_fifo, &rscp->qpid_fifo_lock, qpid);
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}
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u32 cxio_hal_get_cqid(struct cxio_hal_resource *rscp)
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{
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return cxio_hal_get_resource(&rscp->cqid_fifo, &rscp->cqid_fifo_lock);
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}
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void cxio_hal_put_cqid(struct cxio_hal_resource *rscp, u32 cqid)
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{
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cxio_hal_put_resource(&rscp->cqid_fifo, &rscp->cqid_fifo_lock, cqid);
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}
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u32 cxio_hal_get_pdid(struct cxio_hal_resource *rscp)
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{
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return cxio_hal_get_resource(&rscp->pdid_fifo, &rscp->pdid_fifo_lock);
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}
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void cxio_hal_put_pdid(struct cxio_hal_resource *rscp, u32 pdid)
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{
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cxio_hal_put_resource(&rscp->pdid_fifo, &rscp->pdid_fifo_lock, pdid);
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}
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void cxio_hal_destroy_resource(struct cxio_hal_resource *rscp)
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{
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kfifo_free(&rscp->tpt_fifo);
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kfifo_free(&rscp->cqid_fifo);
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kfifo_free(&rscp->qpid_fifo);
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kfifo_free(&rscp->pdid_fifo);
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kfree(rscp);
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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 cxio_hal_pblpool_alloc(struct cxio_rdev *rdev_p, int size)
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{
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unsigned long addr = gen_pool_alloc(rdev_p->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 cxio_hal_pblpool_free(struct cxio_rdev *rdev_p, 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_p->pbl_pool, (unsigned long)addr, size);
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}
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int cxio_hal_pblpool_create(struct cxio_rdev *rdev_p)
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{
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unsigned pbl_start, pbl_chunk;
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rdev_p->pbl_pool = gen_pool_create(MIN_PBL_SHIFT, -1);
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if (!rdev_p->pbl_pool)
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return -ENOMEM;
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pbl_start = rdev_p->rnic_info.pbl_base;
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pbl_chunk = rdev_p->rnic_info.pbl_top - pbl_start + 1;
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while (pbl_start < rdev_p->rnic_info.pbl_top) {
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pbl_chunk = min(rdev_p->rnic_info.pbl_top - pbl_start + 1,
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pbl_chunk);
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if (gen_pool_add(rdev_p->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 "%s: Failed to add all PBL chunks (%x/%x)\n",
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__func__, pbl_start, rdev_p->rnic_info.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 cxio_hal_pblpool_destroy(struct cxio_rdev *rdev_p)
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{
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gen_pool_destroy(rdev_p->pbl_pool);
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}
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/*
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* RQT Memory Manager. Uses Linux generic allocator.
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*/
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#define MIN_RQT_SHIFT 10 /* 1KB == mini RQT size (16 entries) */
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#define RQT_CHUNK 2*1024*1024
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u32 cxio_hal_rqtpool_alloc(struct cxio_rdev *rdev_p, int size)
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{
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unsigned long addr = gen_pool_alloc(rdev_p->rqt_pool, size << 6);
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PDBG("%s addr 0x%x size %d\n", __func__, (u32)addr, size << 6);
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return (u32)addr;
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}
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void cxio_hal_rqtpool_free(struct cxio_rdev *rdev_p, u32 addr, int size)
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{
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PDBG("%s addr 0x%x size %d\n", __func__, addr, size << 6);
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gen_pool_free(rdev_p->rqt_pool, (unsigned long)addr, size << 6);
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}
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int cxio_hal_rqtpool_create(struct cxio_rdev *rdev_p)
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{
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unsigned long i;
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rdev_p->rqt_pool = gen_pool_create(MIN_RQT_SHIFT, -1);
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if (rdev_p->rqt_pool)
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for (i = rdev_p->rnic_info.rqt_base;
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i <= rdev_p->rnic_info.rqt_top - RQT_CHUNK + 1;
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i += RQT_CHUNK)
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gen_pool_add(rdev_p->rqt_pool, i, RQT_CHUNK, -1);
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return rdev_p->rqt_pool ? 0 : -ENOMEM;
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}
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void cxio_hal_rqtpool_destroy(struct cxio_rdev *rdev_p)
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{
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||
|
|
gen_pool_destroy(rdev_p->rqt_pool);
|
||
|
|
}
|