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1714679106
We need at least one per IN/IRQ endpoint, as well as at least 3 for every OUT endpoint. Plus some more depending on the application, in case of cardem there could be one in uart_tx and one in uart_rx. So for cardem, it should be 7 per slot, resulting 14 for dual-slot devices like OWHW and QMOD. Given that we have plenty of RAM available (utilization up from 49% to 56% with this change), we can be on the comfortable size and easily have 20 buffers for now. Future MITM / triple-play applications likely need more. Change-Id: I022ba3bb3e1f5fd0c364aafe1a23f8fd9b2d8499 Related: OS#4251
114 lines
2.8 KiB
C
114 lines
2.8 KiB
C
/* Memory allocation library
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include "talloc.h"
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#include "trace.h"
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#include "utils.h"
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#include <osmocom/core/utils.h>
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/* TODO: this number should dynamically scale. We need at least one per IN/IRQ endpoint,
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* as well as at least 3 for every OUT endpoint. Plus some more depending on the application */
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#define NUM_RCTX_SMALL 20
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#define RCTX_SIZE_SMALL 348
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static uint8_t msgb_data[NUM_RCTX_SMALL][RCTX_SIZE_SMALL] __attribute__((aligned(sizeof(long))));
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static uint8_t msgb_inuse[NUM_RCTX_SMALL];
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void *_talloc_zero(const void *ctx, size_t size, const char *name)
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{
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unsigned int i;
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unsigned long x;
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local_irq_save(x);
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if (size > RCTX_SIZE_SMALL) {
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local_irq_restore(x);
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TRACE_ERROR("%s() request too large(%d > %d)\r\n", __func__, size, RCTX_SIZE_SMALL);
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return NULL;
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}
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for (i = 0; i < ARRAY_SIZE(msgb_inuse); i++) {
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if (!msgb_inuse[i]) {
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uint8_t *out = msgb_data[i];
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msgb_inuse[i] = 1;
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memset(out, 0, size);
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local_irq_restore(x);
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return out;
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}
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}
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local_irq_restore(x);
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TRACE_ERROR("%s() out of memory!\r\n", __func__);
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return NULL;
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}
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int _talloc_free(void *ptr, const char *location)
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{
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unsigned int i;
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unsigned long x;
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local_irq_save(x);
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for (i = 0; i < ARRAY_SIZE(msgb_inuse); i++) {
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if (ptr == msgb_data[i]) {
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if (!msgb_inuse[i]) {
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TRACE_ERROR("%s: double_free by %s\r\n", __func__, location);
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} else {
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msgb_inuse[i] = 0;
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}
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local_irq_restore(x);
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return 0;
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}
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}
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local_irq_restore(x);
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TRACE_ERROR("%s: invalid pointer %p from %s\r\n", __func__, ptr, location);
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return -1;
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}
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void talloc_report(const void *ptr, FILE *f)
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{
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unsigned int i;
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fprintf(f, "talloc_report(): ");
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for (i = 0; i < ARRAY_SIZE(msgb_inuse); i++) {
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if (msgb_inuse[i])
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fputc('X', f);
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else
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fputc('_', f);
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}
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fprintf(f, "\r\n");
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}
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void talloc_set_name_const(const void *ptr, const char *name)
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{
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/* do nothing */
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}
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#if 0
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void *talloc_named_const(const void *context, size_t size, const char *name)
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{
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if (size)
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TRACE_ERROR("%s: called with size!=0 from %s\r\n", __func__, name);
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return NULL;
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}
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void *talloc_pool(const void *context, size_t size)
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{
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}
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#endif
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