1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2018 Chelsio Communications.
10 * Allocate clip entry in HW with associated IPV4/IPv6 address
12 static int clip6_get_mbox(const struct rte_eth_dev *dev, const u32 *lip)
14 struct adapter *adap = ethdev2adap(dev);
16 u64 hi = ((u64)lip[1]) << 32 | lip[0];
17 u64 lo = ((u64)lip[3]) << 32 | lip[2];
19 memset(&c, 0, sizeof(c));
20 c.op_to_write = cpu_to_be32(V_FW_CMD_OP(FW_CLIP_CMD) |
21 F_FW_CMD_REQUEST | F_FW_CMD_WRITE);
22 c.alloc_to_len16 = cpu_to_be32(F_FW_CLIP_CMD_ALLOC | FW_LEN16(c));
25 return t4_wr_mbox_meat(adap, adap->mbox, &c, sizeof(c), &c, false);
29 * Delete clip entry in HW having the associated IPV4/IPV6 address
31 static int clip6_release_mbox(const struct rte_eth_dev *dev, const u32 *lip)
33 struct adapter *adap = ethdev2adap(dev);
35 u64 hi = ((u64)lip[1]) << 32 | lip[0];
36 u64 lo = ((u64)lip[3]) << 32 | lip[2];
38 memset(&c, 0, sizeof(c));
39 c.op_to_write = cpu_to_be32(V_FW_CMD_OP(FW_CLIP_CMD) |
40 F_FW_CMD_REQUEST | F_FW_CMD_READ);
41 c.alloc_to_len16 = cpu_to_be32(F_FW_CLIP_CMD_FREE | FW_LEN16(c));
44 return t4_wr_mbox_meat(adap, adap->mbox, &c, sizeof(c), &c, false);
48 * cxgbe_clip_release - Release associated CLIP entry
49 * @ce: clip entry to release
51 * Releases ref count and frees up a clip entry from CLIP table
53 void cxgbe_clip_release(struct rte_eth_dev *dev, struct clip_entry *ce)
57 t4_os_lock(&ce->lock);
58 if (rte_atomic32_dec_and_test(&ce->refcnt)) {
59 ret = clip6_release_mbox(dev, ce->addr);
61 dev_debug(adap, "CLIP FW DEL CMD failed: %d", ret);
63 t4_os_unlock(&ce->lock);
67 * find_or_alloc_clipe - Find/Allocate a free CLIP entry
69 * @lip: IPV4/IPV6 address to compare/add
70 * Returns pointer to the IPV4/IPV6 entry found/created
72 * Finds/Allocates an CLIP entry to be used for a filter rule.
74 static struct clip_entry *find_or_alloc_clipe(struct clip_tbl *c,
77 struct clip_entry *end, *e;
78 struct clip_entry *first_free = NULL;
79 unsigned int clipt_size = c->clipt_size;
81 for (e = &c->cl_list[0], end = &c->cl_list[clipt_size]; e != end; ++e) {
82 if (rte_atomic32_read(&e->refcnt) == 0) {
86 if (memcmp(lip, e->addr, sizeof(e->addr)) == 0)
102 static struct clip_entry *t4_clip_alloc(struct rte_eth_dev *dev,
105 struct adapter *adap = ethdev2adap(dev);
106 struct clip_tbl *ctbl = adap->clipt;
107 struct clip_entry *ce;
113 t4_os_write_lock(&ctbl->lock);
114 ce = find_or_alloc_clipe(ctbl, lip);
116 t4_os_lock(&ce->lock);
117 if (!rte_atomic32_read(&ce->refcnt)) {
118 rte_memcpy(ce->addr, lip, sizeof(ce->addr));
120 ce->type = FILTER_TYPE_IPV6;
121 rte_atomic32_set(&ce->refcnt, 1);
122 ret = clip6_get_mbox(dev, lip);
125 "CLIP FW ADD CMD failed: %d",
130 ce->type = FILTER_TYPE_IPV4;
133 rte_atomic32_inc(&ce->refcnt);
135 t4_os_unlock(&ce->lock);
137 t4_os_write_unlock(&ctbl->lock);
143 * cxgbe_clip_alloc - Allocate a IPV6 CLIP entry
144 * @dev: rte_eth_dev pointer
145 * @lip: IPV6 address to add
146 * Returns pointer to the CLIP entry created
148 * Allocates a IPV6 CLIP entry to be used for a filter rule.
150 struct clip_entry *cxgbe_clip_alloc(struct rte_eth_dev *dev, u32 *lip)
152 return t4_clip_alloc(dev, lip, FILTER_TYPE_IPV6);
156 * Initialize CLIP Table
158 struct clip_tbl *t4_init_clip_tbl(unsigned int clipt_start,
159 unsigned int clipt_end)
161 unsigned int clipt_size;
162 struct clip_tbl *ctbl;
165 if (clipt_start >= clipt_end)
168 clipt_size = clipt_end - clipt_start + 1;
170 ctbl = t4_os_alloc(sizeof(*ctbl) +
171 clipt_size * sizeof(struct clip_entry));
175 ctbl->clipt_start = clipt_start;
176 ctbl->clipt_size = clipt_size;
178 t4_os_rwlock_init(&ctbl->lock);
180 for (i = 0; i < ctbl->clipt_size; i++) {
181 t4_os_lock_init(&ctbl->cl_list[i].lock);
182 rte_atomic32_set(&ctbl->cl_list[i].refcnt, 0);
191 void t4_cleanup_clip_tbl(struct adapter *adap)
194 t4_os_free(adap->clipt);