1/* SPDX-License-Identifier: GPL-2.0 */
  2/*
  3 * Shared Memory Communications over RDMA (SMC-R) and RoCE
  4 *
  5 * Macros for SMC statistics
  6 *
  7 * Copyright IBM Corp. 2021
  8 *
  9 * Author(s):  Guvenc Gulce
 10 */
 11
 12#ifndef NET_SMC_SMC_STATS_H_
 13#define NET_SMC_SMC_STATS_H_
 14#include <linux/init.h>
 15#include <linux/mutex.h>
 16#include <linux/percpu.h>
 17#include <linux/ctype.h>
 18#include <linux/smc.h>
 19
 20#include "smc_clc.h"
 21
 22#define SMC_MAX_FBACK_RSN_CNT 30
 23
 24enum {
 25	SMC_BUF_8K,
 26	SMC_BUF_16K,
 27	SMC_BUF_32K,
 28	SMC_BUF_64K,
 29	SMC_BUF_128K,
 30	SMC_BUF_256K,
 31	SMC_BUF_512K,
 32	SMC_BUF_1024K,
 33	SMC_BUF_G_1024K,
 34	SMC_BUF_MAX,
 35};
 36
 37struct smc_stats_fback {
 38	int	fback_code;
 39	u16	count;
 40};
 41
 42struct smc_stats_rsn {
 43	struct	smc_stats_fback srv[SMC_MAX_FBACK_RSN_CNT];
 44	struct	smc_stats_fback clnt[SMC_MAX_FBACK_RSN_CNT];
 45	u64			srv_fback_cnt;
 46	u64			clnt_fback_cnt;
 47};
 48
 49struct smc_stats_rmbcnt {
 50	u64	buf_size_small_peer_cnt;
 51	u64	buf_size_small_cnt;
 52	u64	buf_full_peer_cnt;
 53	u64	buf_full_cnt;
 54	u64	reuse_cnt;
 55	u64	alloc_cnt;
 56	u64	dgrade_cnt;
 57};
 58
 59struct smc_stats_memsize {
 60	u64	buf[SMC_BUF_MAX];
 61};
 62
 63struct smc_stats_tech {
 64	struct smc_stats_memsize tx_rmbsize;
 65	struct smc_stats_memsize rx_rmbsize;
 66	struct smc_stats_memsize tx_pd;
 67	struct smc_stats_memsize rx_pd;
 68	struct smc_stats_rmbcnt rmb_tx;
 69	struct smc_stats_rmbcnt rmb_rx;
 70	u64			clnt_v1_succ_cnt;
 71	u64			clnt_v2_succ_cnt;
 72	u64			srv_v1_succ_cnt;
 73	u64			srv_v2_succ_cnt;
 74	u64			sendpage_cnt;
 75	u64			urg_data_cnt;
 76	u64			splice_cnt;
 77	u64			cork_cnt;
 78	u64			ndly_cnt;
 79	u64			rx_bytes;
 80	u64			tx_bytes;
 81	u64			rx_cnt;
 82	u64			tx_cnt;
 83};
 84
 85struct smc_stats {
 86	struct smc_stats_tech	smc[2];
 87	u64			clnt_hshake_err_cnt;
 88	u64			srv_hshake_err_cnt;
 89};
 90
 91#define SMC_STAT_PAYLOAD_SUB(_smc_stats, _tech, key, _len, _rc) \
 92do { \
 93	typeof(_smc_stats) stats = (_smc_stats); \
 94	typeof(_tech) t = (_tech); \
 95	typeof(_len) l = (_len); \
 96	int _pos = fls64((l) >> 13); \
 97	typeof(_rc) r = (_rc); \
 98	int m = SMC_BUF_MAX - 1; \
 99	this_cpu_inc((*stats).smc[t].key ## _cnt); \
100	if (r <= 0) \
101		break; \
102	_pos = (_pos < m) ? ((l == 1 << (_pos + 12)) ? _pos - 1 : _pos) : m; \
103	this_cpu_inc((*stats).smc[t].key ## _pd.buf[_pos]); \
104	this_cpu_add((*stats).smc[t].key ## _bytes, r); \
105} \
106while (0)
107
108#define SMC_STAT_TX_PAYLOAD(_smc, length, rcode) \
109do { \
110	typeof(_smc) __smc = _smc; \
111	struct net *_net = sock_net(&__smc->sk); \
112	struct smc_stats __percpu *_smc_stats = _net->smc.smc_stats; \
113	typeof(length) _len = (length); \
114	typeof(rcode) _rc = (rcode); \
115	bool is_smcd = !__smc->conn.lnk; \
116	if (is_smcd) \
117		SMC_STAT_PAYLOAD_SUB(_smc_stats, SMC_TYPE_D, tx, _len, _rc); \
118	else \
119		SMC_STAT_PAYLOAD_SUB(_smc_stats, SMC_TYPE_R, tx, _len, _rc); \
120} \
121while (0)
122
123#define SMC_STAT_RX_PAYLOAD(_smc, length, rcode) \
124do { \
125	typeof(_smc) __smc = _smc; \
126	struct net *_net = sock_net(&__smc->sk); \
127	struct smc_stats __percpu *_smc_stats = _net->smc.smc_stats; \
128	typeof(length) _len = (length); \
129	typeof(rcode) _rc = (rcode); \
130	bool is_smcd = !__smc->conn.lnk; \
131	if (is_smcd) \
132		SMC_STAT_PAYLOAD_SUB(_smc_stats, SMC_TYPE_D, rx, _len, _rc); \
133	else \
134		SMC_STAT_PAYLOAD_SUB(_smc_stats, SMC_TYPE_R, rx, _len, _rc); \
135} \
136while (0)
137
138#define SMC_STAT_RMB_SIZE_SUB(_smc_stats, _tech, k, _len) \
139do { \
140	typeof(_len) _l = (_len); \
141	typeof(_tech) t = (_tech); \
142	int _pos = fls((_l) >> 13); \
143	int m = SMC_BUF_MAX - 1; \
144	_pos = (_pos < m) ? ((_l == 1 << (_pos + 12)) ? _pos - 1 : _pos) : m; \
145	this_cpu_inc((*(_smc_stats)).smc[t].k ## _rmbsize.buf[_pos]); \
146} \
147while (0)
148
149#define SMC_STAT_RMB_SUB(_smc_stats, type, t, key) \
150	this_cpu_inc((*(_smc_stats)).smc[t].rmb ## _ ## key.type ## _cnt)
151
152#define SMC_STAT_RMB_SIZE(_smc, _is_smcd, _is_rx, _len) \
153do { \
154	struct net *_net = sock_net(&(_smc)->sk); \
155	struct smc_stats __percpu *_smc_stats = _net->smc.smc_stats; \
156	typeof(_is_smcd) is_d = (_is_smcd); \
157	typeof(_is_rx) is_r = (_is_rx); \
158	typeof(_len) l = (_len); \
159	if ((is_d) && (is_r)) \
160		SMC_STAT_RMB_SIZE_SUB(_smc_stats, SMC_TYPE_D, rx, l); \
161	if ((is_d) && !(is_r)) \
162		SMC_STAT_RMB_SIZE_SUB(_smc_stats, SMC_TYPE_D, tx, l); \
163	if (!(is_d) && (is_r)) \
164		SMC_STAT_RMB_SIZE_SUB(_smc_stats, SMC_TYPE_R, rx, l); \
165	if (!(is_d) && !(is_r)) \
166		SMC_STAT_RMB_SIZE_SUB(_smc_stats, SMC_TYPE_R, tx, l); \
167} \
168while (0)
169
170#define SMC_STAT_RMB(_smc, type, _is_smcd, _is_rx) \
171do { \
172	struct net *net = sock_net(&(_smc)->sk); \
173	struct smc_stats __percpu *_smc_stats = net->smc.smc_stats; \
174	typeof(_is_smcd) is_d = (_is_smcd); \
175	typeof(_is_rx) is_r = (_is_rx); \
176	if ((is_d) && (is_r)) \
177		SMC_STAT_RMB_SUB(_smc_stats, type, SMC_TYPE_D, rx); \
178	if ((is_d) && !(is_r)) \
179		SMC_STAT_RMB_SUB(_smc_stats, type, SMC_TYPE_D, tx); \
180	if (!(is_d) && (is_r)) \
181		SMC_STAT_RMB_SUB(_smc_stats, type, SMC_TYPE_R, rx); \
182	if (!(is_d) && !(is_r)) \
183		SMC_STAT_RMB_SUB(_smc_stats, type, SMC_TYPE_R, tx); \
184} \
185while (0)
186
187#define SMC_STAT_BUF_REUSE(smc, is_smcd, is_rx) \
188	SMC_STAT_RMB(smc, reuse, is_smcd, is_rx)
189
190#define SMC_STAT_RMB_ALLOC(smc, is_smcd, is_rx) \
191	SMC_STAT_RMB(smc, alloc, is_smcd, is_rx)
192
193#define SMC_STAT_RMB_DOWNGRADED(smc, is_smcd, is_rx) \
194	SMC_STAT_RMB(smc, dgrade, is_smcd, is_rx)
195
196#define SMC_STAT_RMB_TX_PEER_FULL(smc, is_smcd) \
197	SMC_STAT_RMB(smc, buf_full_peer, is_smcd, false)
198
199#define SMC_STAT_RMB_TX_FULL(smc, is_smcd) \
200	SMC_STAT_RMB(smc, buf_full, is_smcd, false)
201
202#define SMC_STAT_RMB_TX_PEER_SIZE_SMALL(smc, is_smcd) \
203	SMC_STAT_RMB(smc, buf_size_small_peer, is_smcd, false)
204
205#define SMC_STAT_RMB_TX_SIZE_SMALL(smc, is_smcd) \
206	SMC_STAT_RMB(smc, buf_size_small, is_smcd, false)
207
208#define SMC_STAT_RMB_RX_SIZE_SMALL(smc, is_smcd) \
209	SMC_STAT_RMB(smc, buf_size_small, is_smcd, true)
210
211#define SMC_STAT_RMB_RX_FULL(smc, is_smcd) \
212	SMC_STAT_RMB(smc, buf_full, is_smcd, true)
213
214#define SMC_STAT_INC(_smc, type) \
215do { \
216	typeof(_smc) __smc = _smc; \
217	bool is_smcd = !(__smc)->conn.lnk; \
218	struct net *net = sock_net(&(__smc)->sk); \
219	struct smc_stats __percpu *smc_stats = net->smc.smc_stats; \
220	if ((is_smcd)) \
221		this_cpu_inc(smc_stats->smc[SMC_TYPE_D].type); \
222	else \
223		this_cpu_inc(smc_stats->smc[SMC_TYPE_R].type); \
224} \
225while (0)
226
227#define SMC_STAT_CLNT_SUCC_INC(net, _aclc) \
228do { \
229	typeof(_aclc) acl = (_aclc); \
230	bool is_v2 = (acl->hdr.version == SMC_V2); \
231	bool is_smcd = (acl->hdr.typev1 == SMC_TYPE_D); \
232	struct smc_stats __percpu *smc_stats = (net)->smc.smc_stats; \
233	if (is_v2 && is_smcd) \
234		this_cpu_inc(smc_stats->smc[SMC_TYPE_D].clnt_v2_succ_cnt); \
235	else if (is_v2 && !is_smcd) \
236		this_cpu_inc(smc_stats->smc[SMC_TYPE_R].clnt_v2_succ_cnt); \
237	else if (!is_v2 && is_smcd) \
238		this_cpu_inc(smc_stats->smc[SMC_TYPE_D].clnt_v1_succ_cnt); \
239	else if (!is_v2 && !is_smcd) \
240		this_cpu_inc(smc_stats->smc[SMC_TYPE_R].clnt_v1_succ_cnt); \
241} \
242while (0)
243
244#define SMC_STAT_SERV_SUCC_INC(net, _ini) \
245do { \
246	typeof(_ini) i = (_ini); \
247	bool is_v2 = (i->smcd_version & SMC_V2); \
248	bool is_smcd = (i->is_smcd); \
249	typeof(net->smc.smc_stats) smc_stats = (net)->smc.smc_stats; \
250	if (is_v2 && is_smcd) \
251		this_cpu_inc(smc_stats->smc[SMC_TYPE_D].srv_v2_succ_cnt); \
252	else if (is_v2 && !is_smcd) \
253		this_cpu_inc(smc_stats->smc[SMC_TYPE_R].srv_v2_succ_cnt); \
254	else if (!is_v2 && is_smcd) \
255		this_cpu_inc(smc_stats->smc[SMC_TYPE_D].srv_v1_succ_cnt); \
256	else if (!is_v2 && !is_smcd) \
257		this_cpu_inc(smc_stats->smc[SMC_TYPE_R].srv_v1_succ_cnt); \
258} \
259while (0)
260
261int smc_nl_get_stats(struct sk_buff *skb, struct netlink_callback *cb);
262int smc_nl_get_fback_stats(struct sk_buff *skb, struct netlink_callback *cb);
263int smc_stats_init(struct net *net);
264void smc_stats_exit(struct net *net);
265
266#endif /* NET_SMC_SMC_STATS_H_ */