1/*************************************************************************
2Copyright (c) 2003-2007  Cavium Networks (support@cavium.com). All rights
3reserved.
4
5
6Redistribution and use in source and binary forms, with or without
7modification, are permitted provided that the following conditions are
8met:
9
10    * Redistributions of source code must retain the above copyright
11      notice, this list of conditions and the following disclaimer.
12
13    * Redistributions in binary form must reproduce the above
14      copyright notice, this list of conditions and the following
15      disclaimer in the documentation and/or other materials provided
16      with the distribution.
17
18    * Neither the name of Cavium Networks nor the names of
19      its contributors may be used to endorse or promote products
20      derived from this software without specific prior written
21      permission.
22
23This Software, including technical data, may be subject to U.S. export  control laws, including the U.S. Export Administration Act and its  associated regulations, and may be subject to export or import  regulations in other countries.
24
25TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
26AND WITH ALL FAULTS AND CAVIUM  NETWORKS MAKES NO PROMISES, REPRESENTATIONS OR WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE, MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR CORRESPONDENCE TO DESCRIPTION. THE ENTIRE  RISK ARISING OUT OF USE OR PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
27
28*************************************************************************/
29
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD$");
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/bus.h>
36#include <sys/endian.h>
37#include <sys/kernel.h>
38#include <sys/mbuf.h>
39#include <sys/socket.h>
40
41#include <net/ethernet.h>
42#include <net/if.h>
43#include <net/if_var.h>
44
45#include "wrapper-cvmx-includes.h"
46#include "ethernet-headers.h"
47
48/**
49 * Fill the supplied hardware pool with mbufs
50 *
51 * @param pool     Pool to allocate an mbuf for
52 * @param size     Size of the buffer needed for the pool
53 * @param elements Number of buffers to allocate
54 */
55int cvm_oct_mem_fill_fpa(int pool, int size, int elements)
56{
57	int freed = elements;
58	while (freed) {
59		KASSERT(size <= MCLBYTES - 128, ("mbuf clusters are too small"));
60
61		struct mbuf *m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
62		if (__predict_false(m == NULL)) {
63			printf("Failed to allocate mbuf for hardware pool %d\n", pool);
64			break;
65		}
66
67		m->m_data += 128 - (((uintptr_t)m->m_data) & 0x7f);
68		*(struct mbuf **)(m->m_data - sizeof(void *)) = m;
69		cvmx_fpa_free(m->m_data, pool, DONT_WRITEBACK(size/128));
70		freed--;
71	}
72	return (elements - freed);
73}
74
75
76/**
77 * Free the supplied hardware pool of mbufs
78 *
79 * @param pool     Pool to allocate an mbuf for
80 * @param size     Size of the buffer needed for the pool
81 * @param elements Number of buffers to allocate
82 */
83void cvm_oct_mem_empty_fpa(int pool, int size, int elements)
84{
85	char *memory;
86
87	do {
88		memory = cvmx_fpa_alloc(pool);
89		if (memory) {
90			struct mbuf *m = *(struct mbuf **)(memory - sizeof(void *));
91			elements--;
92			m_freem(m);
93		}
94	} while (memory);
95
96	if (elements < 0)
97		printf("Warning: Freeing of pool %u had too many mbufs (%d)\n", pool, elements);
98	else if (elements > 0)
99		printf("Warning: Freeing of pool %u is missing %d mbufs\n", pool, elements);
100}
101