1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Broadcom BCM7xxx System Port Ethernet MAC driver |
4 | * |
5 | * Copyright (C) 2014 Broadcom Corporation |
6 | */ |
7 | |
8 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
9 | |
10 | #include <linux/init.h> |
11 | #include <linux/interrupt.h> |
12 | #include <linux/module.h> |
13 | #include <linux/kernel.h> |
14 | #include <linux/netdevice.h> |
15 | #include <linux/dsa/brcm.h> |
16 | #include <linux/etherdevice.h> |
17 | #include <linux/platform_device.h> |
18 | #include <linux/of.h> |
19 | #include <linux/of_net.h> |
20 | #include <linux/of_mdio.h> |
21 | #include <linux/phy.h> |
22 | #include <linux/phy_fixed.h> |
23 | #include <net/dsa.h> |
24 | #include <linux/clk.h> |
25 | #include <net/ip.h> |
26 | #include <net/ipv6.h> |
27 | |
28 | #include "bcmsysport.h" |
29 | |
30 | /* I/O accessors register helpers */ |
31 | #define BCM_SYSPORT_IO_MACRO(name, offset) \ |
32 | static inline u32 name##_readl(struct bcm_sysport_priv *priv, u32 off) \ |
33 | { \ |
34 | u32 reg = readl_relaxed(priv->base + offset + off); \ |
35 | return reg; \ |
36 | } \ |
37 | static inline void name##_writel(struct bcm_sysport_priv *priv, \ |
38 | u32 val, u32 off) \ |
39 | { \ |
40 | writel_relaxed(val, priv->base + offset + off); \ |
41 | } \ |
42 | |
43 | BCM_SYSPORT_IO_MACRO(intrl2_0, SYS_PORT_INTRL2_0_OFFSET); |
44 | BCM_SYSPORT_IO_MACRO(intrl2_1, SYS_PORT_INTRL2_1_OFFSET); |
45 | BCM_SYSPORT_IO_MACRO(umac, SYS_PORT_UMAC_OFFSET); |
46 | BCM_SYSPORT_IO_MACRO(gib, SYS_PORT_GIB_OFFSET); |
47 | BCM_SYSPORT_IO_MACRO(tdma, SYS_PORT_TDMA_OFFSET); |
48 | BCM_SYSPORT_IO_MACRO(rxchk, SYS_PORT_RXCHK_OFFSET); |
49 | BCM_SYSPORT_IO_MACRO(txchk, SYS_PORT_TXCHK_OFFSET); |
50 | BCM_SYSPORT_IO_MACRO(rbuf, SYS_PORT_RBUF_OFFSET); |
51 | BCM_SYSPORT_IO_MACRO(tbuf, SYS_PORT_TBUF_OFFSET); |
52 | BCM_SYSPORT_IO_MACRO(topctrl, SYS_PORT_TOPCTRL_OFFSET); |
53 | |
54 | /* On SYSTEMPORT Lite, any register after RDMA_STATUS has the exact |
55 | * same layout, except it has been moved by 4 bytes up, *sigh* |
56 | */ |
57 | static inline u32 rdma_readl(struct bcm_sysport_priv *priv, u32 off) |
58 | { |
59 | if (priv->is_lite && off >= RDMA_STATUS) |
60 | off += 4; |
61 | return readl_relaxed(priv->base + SYS_PORT_RDMA_OFFSET + off); |
62 | } |
63 | |
64 | static inline void rdma_writel(struct bcm_sysport_priv *priv, u32 val, u32 off) |
65 | { |
66 | if (priv->is_lite && off >= RDMA_STATUS) |
67 | off += 4; |
68 | writel_relaxed(val, priv->base + SYS_PORT_RDMA_OFFSET + off); |
69 | } |
70 | |
71 | static inline u32 tdma_control_bit(struct bcm_sysport_priv *priv, u32 bit) |
72 | { |
73 | if (!priv->is_lite) { |
74 | return BIT(bit); |
75 | } else { |
76 | if (bit >= ACB_ALGO) |
77 | return BIT(bit + 1); |
78 | else |
79 | return BIT(bit); |
80 | } |
81 | } |
82 | |
83 | /* L2-interrupt masking/unmasking helpers, does automatic saving of the applied |
84 | * mask in a software copy to avoid CPU_MASK_STATUS reads in hot-paths. |
85 | */ |
86 | #define BCM_SYSPORT_INTR_L2(which) \ |
87 | static inline void intrl2_##which##_mask_clear(struct bcm_sysport_priv *priv, \ |
88 | u32 mask) \ |
89 | { \ |
90 | priv->irq##which##_mask &= ~(mask); \ |
91 | intrl2_##which##_writel(priv, mask, INTRL2_CPU_MASK_CLEAR); \ |
92 | } \ |
93 | static inline void intrl2_##which##_mask_set(struct bcm_sysport_priv *priv, \ |
94 | u32 mask) \ |
95 | { \ |
96 | intrl2_## which##_writel(priv, mask, INTRL2_CPU_MASK_SET); \ |
97 | priv->irq##which##_mask |= (mask); \ |
98 | } \ |
99 | |
100 | BCM_SYSPORT_INTR_L2(0) |
101 | BCM_SYSPORT_INTR_L2(1) |
102 | |
103 | /* Register accesses to GISB/RBUS registers are expensive (few hundred |
104 | * nanoseconds), so keep the check for 64-bits explicit here to save |
105 | * one register write per-packet on 32-bits platforms. |
106 | */ |
107 | static inline void dma_desc_set_addr(struct bcm_sysport_priv *priv, |
108 | void __iomem *d, |
109 | dma_addr_t addr) |
110 | { |
111 | #ifdef CONFIG_PHYS_ADDR_T_64BIT |
112 | writel_relaxed(upper_32_bits(addr) & DESC_ADDR_HI_MASK, |
113 | d + DESC_ADDR_HI_STATUS_LEN); |
114 | #endif |
115 | writel_relaxed(lower_32_bits(addr), d + DESC_ADDR_LO); |
116 | } |
117 | |
118 | /* Ethtool operations */ |
119 | static void bcm_sysport_set_rx_csum(struct net_device *dev, |
120 | netdev_features_t wanted) |
121 | { |
122 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
123 | u32 reg; |
124 | |
125 | priv->rx_chk_en = !!(wanted & NETIF_F_RXCSUM); |
126 | reg = rxchk_readl(priv, RXCHK_CONTROL); |
127 | /* Clear L2 header checks, which would prevent BPDUs |
128 | * from being received. |
129 | */ |
130 | reg &= ~RXCHK_L2_HDR_DIS; |
131 | if (priv->rx_chk_en) |
132 | reg |= RXCHK_EN; |
133 | else |
134 | reg &= ~RXCHK_EN; |
135 | |
136 | /* If UniMAC forwards CRC, we need to skip over it to get |
137 | * a valid CHK bit to be set in the per-packet status word |
138 | */ |
139 | if (priv->rx_chk_en && priv->crc_fwd) |
140 | reg |= RXCHK_SKIP_FCS; |
141 | else |
142 | reg &= ~RXCHK_SKIP_FCS; |
143 | |
144 | /* If Broadcom tags are enabled (e.g: using a switch), make |
145 | * sure we tell the RXCHK hardware to expect a 4-bytes Broadcom |
146 | * tag after the Ethernet MAC Source Address. |
147 | */ |
148 | if (netdev_uses_dsa(dev)) |
149 | reg |= RXCHK_BRCM_TAG_EN; |
150 | else |
151 | reg &= ~RXCHK_BRCM_TAG_EN; |
152 | |
153 | rxchk_writel(priv, val: reg, RXCHK_CONTROL); |
154 | } |
155 | |
156 | static void bcm_sysport_set_tx_csum(struct net_device *dev, |
157 | netdev_features_t wanted) |
158 | { |
159 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
160 | u32 reg; |
161 | |
162 | /* Hardware transmit checksum requires us to enable the Transmit status |
163 | * block prepended to the packet contents |
164 | */ |
165 | priv->tsb_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | |
166 | NETIF_F_HW_VLAN_CTAG_TX)); |
167 | reg = tdma_readl(priv, TDMA_CONTROL); |
168 | if (priv->tsb_en) |
169 | reg |= tdma_control_bit(priv, TSB_EN); |
170 | else |
171 | reg &= ~tdma_control_bit(priv, TSB_EN); |
172 | /* Indicating that software inserts Broadcom tags is needed for the TX |
173 | * checksum to be computed correctly when using VLAN HW acceleration, |
174 | * else it has no effect, so it can always be turned on. |
175 | */ |
176 | if (netdev_uses_dsa(dev)) |
177 | reg |= tdma_control_bit(priv, SW_BRCM_TAG); |
178 | else |
179 | reg &= ~tdma_control_bit(priv, SW_BRCM_TAG); |
180 | tdma_writel(priv, val: reg, TDMA_CONTROL); |
181 | |
182 | /* Default TPID is ETH_P_8021AD, change to ETH_P_8021Q */ |
183 | if (wanted & NETIF_F_HW_VLAN_CTAG_TX) |
184 | tdma_writel(priv, ETH_P_8021Q, TDMA_TPID); |
185 | } |
186 | |
187 | static int bcm_sysport_set_features(struct net_device *dev, |
188 | netdev_features_t features) |
189 | { |
190 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
191 | int ret; |
192 | |
193 | ret = clk_prepare_enable(clk: priv->clk); |
194 | if (ret) |
195 | return ret; |
196 | |
197 | /* Read CRC forward */ |
198 | if (!priv->is_lite) |
199 | priv->crc_fwd = !!(umac_readl(priv, UMAC_CMD) & CMD_CRC_FWD); |
200 | else |
201 | priv->crc_fwd = !((gib_readl(priv, GIB_CONTROL) & |
202 | GIB_FCS_STRIP) >> GIB_FCS_STRIP_SHIFT); |
203 | |
204 | bcm_sysport_set_rx_csum(dev, wanted: features); |
205 | bcm_sysport_set_tx_csum(dev, wanted: features); |
206 | |
207 | clk_disable_unprepare(clk: priv->clk); |
208 | |
209 | return 0; |
210 | } |
211 | |
212 | /* Hardware counters must be kept in sync because the order/offset |
213 | * is important here (order in structure declaration = order in hardware) |
214 | */ |
215 | static const struct bcm_sysport_stats bcm_sysport_gstrings_stats[] = { |
216 | /* general stats */ |
217 | STAT_NETDEV64(rx_packets), |
218 | STAT_NETDEV64(tx_packets), |
219 | STAT_NETDEV64(rx_bytes), |
220 | STAT_NETDEV64(tx_bytes), |
221 | STAT_NETDEV(rx_errors), |
222 | STAT_NETDEV(tx_errors), |
223 | STAT_NETDEV(rx_dropped), |
224 | STAT_NETDEV(tx_dropped), |
225 | STAT_NETDEV(multicast), |
226 | /* UniMAC RSV counters */ |
227 | STAT_MIB_RX("rx_64_octets" , mib.rx.pkt_cnt.cnt_64), |
228 | STAT_MIB_RX("rx_65_127_oct" , mib.rx.pkt_cnt.cnt_127), |
229 | STAT_MIB_RX("rx_128_255_oct" , mib.rx.pkt_cnt.cnt_255), |
230 | STAT_MIB_RX("rx_256_511_oct" , mib.rx.pkt_cnt.cnt_511), |
231 | STAT_MIB_RX("rx_512_1023_oct" , mib.rx.pkt_cnt.cnt_1023), |
232 | STAT_MIB_RX("rx_1024_1518_oct" , mib.rx.pkt_cnt.cnt_1518), |
233 | STAT_MIB_RX("rx_vlan_1519_1522_oct" , mib.rx.pkt_cnt.cnt_mgv), |
234 | STAT_MIB_RX("rx_1522_2047_oct" , mib.rx.pkt_cnt.cnt_2047), |
235 | STAT_MIB_RX("rx_2048_4095_oct" , mib.rx.pkt_cnt.cnt_4095), |
236 | STAT_MIB_RX("rx_4096_9216_oct" , mib.rx.pkt_cnt.cnt_9216), |
237 | STAT_MIB_RX("rx_pkts" , mib.rx.pkt), |
238 | STAT_MIB_RX("rx_bytes" , mib.rx.bytes), |
239 | STAT_MIB_RX("rx_multicast" , mib.rx.mca), |
240 | STAT_MIB_RX("rx_broadcast" , mib.rx.bca), |
241 | STAT_MIB_RX("rx_fcs" , mib.rx.fcs), |
242 | STAT_MIB_RX("rx_control" , mib.rx.cf), |
243 | STAT_MIB_RX("rx_pause" , mib.rx.pf), |
244 | STAT_MIB_RX("rx_unknown" , mib.rx.uo), |
245 | STAT_MIB_RX("rx_align" , mib.rx.aln), |
246 | STAT_MIB_RX("rx_outrange" , mib.rx.flr), |
247 | STAT_MIB_RX("rx_code" , mib.rx.cde), |
248 | STAT_MIB_RX("rx_carrier" , mib.rx.fcr), |
249 | STAT_MIB_RX("rx_oversize" , mib.rx.ovr), |
250 | STAT_MIB_RX("rx_jabber" , mib.rx.jbr), |
251 | STAT_MIB_RX("rx_mtu_err" , mib.rx.mtue), |
252 | STAT_MIB_RX("rx_good_pkts" , mib.rx.pok), |
253 | STAT_MIB_RX("rx_unicast" , mib.rx.uc), |
254 | STAT_MIB_RX("rx_ppp" , mib.rx.ppp), |
255 | STAT_MIB_RX("rx_crc" , mib.rx.rcrc), |
256 | /* UniMAC TSV counters */ |
257 | STAT_MIB_TX("tx_64_octets" , mib.tx.pkt_cnt.cnt_64), |
258 | STAT_MIB_TX("tx_65_127_oct" , mib.tx.pkt_cnt.cnt_127), |
259 | STAT_MIB_TX("tx_128_255_oct" , mib.tx.pkt_cnt.cnt_255), |
260 | STAT_MIB_TX("tx_256_511_oct" , mib.tx.pkt_cnt.cnt_511), |
261 | STAT_MIB_TX("tx_512_1023_oct" , mib.tx.pkt_cnt.cnt_1023), |
262 | STAT_MIB_TX("tx_1024_1518_oct" , mib.tx.pkt_cnt.cnt_1518), |
263 | STAT_MIB_TX("tx_vlan_1519_1522_oct" , mib.tx.pkt_cnt.cnt_mgv), |
264 | STAT_MIB_TX("tx_1522_2047_oct" , mib.tx.pkt_cnt.cnt_2047), |
265 | STAT_MIB_TX("tx_2048_4095_oct" , mib.tx.pkt_cnt.cnt_4095), |
266 | STAT_MIB_TX("tx_4096_9216_oct" , mib.tx.pkt_cnt.cnt_9216), |
267 | STAT_MIB_TX("tx_pkts" , mib.tx.pkts), |
268 | STAT_MIB_TX("tx_multicast" , mib.tx.mca), |
269 | STAT_MIB_TX("tx_broadcast" , mib.tx.bca), |
270 | STAT_MIB_TX("tx_pause" , mib.tx.pf), |
271 | STAT_MIB_TX("tx_control" , mib.tx.cf), |
272 | STAT_MIB_TX("tx_fcs_err" , mib.tx.fcs), |
273 | STAT_MIB_TX("tx_oversize" , mib.tx.ovr), |
274 | STAT_MIB_TX("tx_defer" , mib.tx.drf), |
275 | STAT_MIB_TX("tx_excess_defer" , mib.tx.edf), |
276 | STAT_MIB_TX("tx_single_col" , mib.tx.scl), |
277 | STAT_MIB_TX("tx_multi_col" , mib.tx.mcl), |
278 | STAT_MIB_TX("tx_late_col" , mib.tx.lcl), |
279 | STAT_MIB_TX("tx_excess_col" , mib.tx.ecl), |
280 | STAT_MIB_TX("tx_frags" , mib.tx.frg), |
281 | STAT_MIB_TX("tx_total_col" , mib.tx.ncl), |
282 | STAT_MIB_TX("tx_jabber" , mib.tx.jbr), |
283 | STAT_MIB_TX("tx_bytes" , mib.tx.bytes), |
284 | STAT_MIB_TX("tx_good_pkts" , mib.tx.pok), |
285 | STAT_MIB_TX("tx_unicast" , mib.tx.uc), |
286 | /* UniMAC RUNT counters */ |
287 | STAT_RUNT("rx_runt_pkts" , mib.rx_runt_cnt), |
288 | STAT_RUNT("rx_runt_valid_fcs" , mib.rx_runt_fcs), |
289 | STAT_RUNT("rx_runt_inval_fcs_align" , mib.rx_runt_fcs_align), |
290 | STAT_RUNT("rx_runt_bytes" , mib.rx_runt_bytes), |
291 | /* RXCHK misc statistics */ |
292 | STAT_RXCHK("rxchk_bad_csum" , mib.rxchk_bad_csum, RXCHK_BAD_CSUM_CNTR), |
293 | STAT_RXCHK("rxchk_other_pkt_disc" , mib.rxchk_other_pkt_disc, |
294 | RXCHK_OTHER_DISC_CNTR), |
295 | /* RBUF misc statistics */ |
296 | STAT_RBUF("rbuf_ovflow_cnt" , mib.rbuf_ovflow_cnt, RBUF_OVFL_DISC_CNTR), |
297 | STAT_RBUF("rbuf_err_cnt" , mib.rbuf_err_cnt, RBUF_ERR_PKT_CNTR), |
298 | /* RDMA misc statistics */ |
299 | STAT_RDMA("rdma_ovflow_cnt" , mib.rdma_ovflow_cnt, RDMA_OVFL_DISC_CNTR), |
300 | STAT_MIB_SOFT("alloc_rx_buff_failed" , mib.alloc_rx_buff_failed), |
301 | STAT_MIB_SOFT("rx_dma_failed" , mib.rx_dma_failed), |
302 | STAT_MIB_SOFT("tx_dma_failed" , mib.tx_dma_failed), |
303 | STAT_MIB_SOFT("tx_realloc_tsb" , mib.tx_realloc_tsb), |
304 | STAT_MIB_SOFT("tx_realloc_tsb_failed" , mib.tx_realloc_tsb_failed), |
305 | /* Per TX-queue statistics are dynamically appended */ |
306 | }; |
307 | |
308 | #define BCM_SYSPORT_STATS_LEN ARRAY_SIZE(bcm_sysport_gstrings_stats) |
309 | |
310 | static void bcm_sysport_get_drvinfo(struct net_device *dev, |
311 | struct ethtool_drvinfo *info) |
312 | { |
313 | strscpy(p: info->driver, KBUILD_MODNAME, size: sizeof(info->driver)); |
314 | strscpy(p: info->bus_info, q: "platform" , size: sizeof(info->bus_info)); |
315 | } |
316 | |
317 | static u32 bcm_sysport_get_msglvl(struct net_device *dev) |
318 | { |
319 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
320 | |
321 | return priv->msg_enable; |
322 | } |
323 | |
324 | static void bcm_sysport_set_msglvl(struct net_device *dev, u32 enable) |
325 | { |
326 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
327 | |
328 | priv->msg_enable = enable; |
329 | } |
330 | |
331 | static inline bool bcm_sysport_lite_stat_valid(enum bcm_sysport_stat_type type) |
332 | { |
333 | switch (type) { |
334 | case BCM_SYSPORT_STAT_NETDEV: |
335 | case BCM_SYSPORT_STAT_NETDEV64: |
336 | case BCM_SYSPORT_STAT_RXCHK: |
337 | case BCM_SYSPORT_STAT_RBUF: |
338 | case BCM_SYSPORT_STAT_RDMA: |
339 | case BCM_SYSPORT_STAT_SOFT: |
340 | return true; |
341 | default: |
342 | return false; |
343 | } |
344 | } |
345 | |
346 | static int bcm_sysport_get_sset_count(struct net_device *dev, int string_set) |
347 | { |
348 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
349 | const struct bcm_sysport_stats *s; |
350 | unsigned int i, j; |
351 | |
352 | switch (string_set) { |
353 | case ETH_SS_STATS: |
354 | for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) { |
355 | s = &bcm_sysport_gstrings_stats[i]; |
356 | if (priv->is_lite && |
357 | !bcm_sysport_lite_stat_valid(type: s->type)) |
358 | continue; |
359 | j++; |
360 | } |
361 | /* Include per-queue statistics */ |
362 | return j + dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT; |
363 | default: |
364 | return -EOPNOTSUPP; |
365 | } |
366 | } |
367 | |
368 | static void bcm_sysport_get_strings(struct net_device *dev, |
369 | u32 stringset, u8 *data) |
370 | { |
371 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
372 | const struct bcm_sysport_stats *s; |
373 | char buf[128]; |
374 | int i, j; |
375 | |
376 | switch (stringset) { |
377 | case ETH_SS_STATS: |
378 | for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) { |
379 | s = &bcm_sysport_gstrings_stats[i]; |
380 | if (priv->is_lite && |
381 | !bcm_sysport_lite_stat_valid(type: s->type)) |
382 | continue; |
383 | |
384 | memcpy(data + j * ETH_GSTRING_LEN, s->stat_string, |
385 | ETH_GSTRING_LEN); |
386 | j++; |
387 | } |
388 | |
389 | for (i = 0; i < dev->num_tx_queues; i++) { |
390 | snprintf(buf, size: sizeof(buf), fmt: "txq%d_packets" , i); |
391 | memcpy(data + j * ETH_GSTRING_LEN, buf, |
392 | ETH_GSTRING_LEN); |
393 | j++; |
394 | |
395 | snprintf(buf, size: sizeof(buf), fmt: "txq%d_bytes" , i); |
396 | memcpy(data + j * ETH_GSTRING_LEN, buf, |
397 | ETH_GSTRING_LEN); |
398 | j++; |
399 | } |
400 | break; |
401 | default: |
402 | break; |
403 | } |
404 | } |
405 | |
406 | static void bcm_sysport_update_mib_counters(struct bcm_sysport_priv *priv) |
407 | { |
408 | int i, j = 0; |
409 | |
410 | for (i = 0; i < BCM_SYSPORT_STATS_LEN; i++) { |
411 | const struct bcm_sysport_stats *s; |
412 | u8 offset = 0; |
413 | u32 val = 0; |
414 | char *p; |
415 | |
416 | s = &bcm_sysport_gstrings_stats[i]; |
417 | switch (s->type) { |
418 | case BCM_SYSPORT_STAT_NETDEV: |
419 | case BCM_SYSPORT_STAT_NETDEV64: |
420 | case BCM_SYSPORT_STAT_SOFT: |
421 | continue; |
422 | case BCM_SYSPORT_STAT_MIB_RX: |
423 | case BCM_SYSPORT_STAT_MIB_TX: |
424 | case BCM_SYSPORT_STAT_RUNT: |
425 | if (priv->is_lite) |
426 | continue; |
427 | |
428 | if (s->type != BCM_SYSPORT_STAT_MIB_RX) |
429 | offset = UMAC_MIB_STAT_OFFSET; |
430 | val = umac_readl(priv, UMAC_MIB_START + j + offset); |
431 | break; |
432 | case BCM_SYSPORT_STAT_RXCHK: |
433 | val = rxchk_readl(priv, off: s->reg_offset); |
434 | if (val == ~0) |
435 | rxchk_writel(priv, val: 0, off: s->reg_offset); |
436 | break; |
437 | case BCM_SYSPORT_STAT_RBUF: |
438 | val = rbuf_readl(priv, off: s->reg_offset); |
439 | if (val == ~0) |
440 | rbuf_writel(priv, val: 0, off: s->reg_offset); |
441 | break; |
442 | case BCM_SYSPORT_STAT_RDMA: |
443 | if (!priv->is_lite) |
444 | continue; |
445 | |
446 | val = rdma_readl(priv, off: s->reg_offset); |
447 | if (val == ~0) |
448 | rdma_writel(priv, val: 0, off: s->reg_offset); |
449 | break; |
450 | } |
451 | |
452 | j += s->stat_sizeof; |
453 | p = (char *)priv + s->stat_offset; |
454 | *(u32 *)p = val; |
455 | } |
456 | |
457 | netif_dbg(priv, hw, priv->netdev, "updated MIB counters\n" ); |
458 | } |
459 | |
460 | static void bcm_sysport_update_tx_stats(struct bcm_sysport_priv *priv, |
461 | u64 *tx_bytes, u64 *tx_packets) |
462 | { |
463 | struct bcm_sysport_tx_ring *ring; |
464 | u64 bytes = 0, packets = 0; |
465 | unsigned int start; |
466 | unsigned int q; |
467 | |
468 | for (q = 0; q < priv->netdev->num_tx_queues; q++) { |
469 | ring = &priv->tx_rings[q]; |
470 | do { |
471 | start = u64_stats_fetch_begin(syncp: &priv->syncp); |
472 | bytes = ring->bytes; |
473 | packets = ring->packets; |
474 | } while (u64_stats_fetch_retry(syncp: &priv->syncp, start)); |
475 | |
476 | *tx_bytes += bytes; |
477 | *tx_packets += packets; |
478 | } |
479 | } |
480 | |
481 | static void bcm_sysport_get_stats(struct net_device *dev, |
482 | struct ethtool_stats *stats, u64 *data) |
483 | { |
484 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
485 | struct bcm_sysport_stats64 *stats64 = &priv->stats64; |
486 | struct u64_stats_sync *syncp = &priv->syncp; |
487 | struct bcm_sysport_tx_ring *ring; |
488 | u64 tx_bytes = 0, tx_packets = 0; |
489 | unsigned int start; |
490 | int i, j; |
491 | |
492 | if (netif_running(dev)) { |
493 | bcm_sysport_update_mib_counters(priv); |
494 | bcm_sysport_update_tx_stats(priv, tx_bytes: &tx_bytes, tx_packets: &tx_packets); |
495 | stats64->tx_bytes = tx_bytes; |
496 | stats64->tx_packets = tx_packets; |
497 | } |
498 | |
499 | for (i = 0, j = 0; i < BCM_SYSPORT_STATS_LEN; i++) { |
500 | const struct bcm_sysport_stats *s; |
501 | char *p; |
502 | |
503 | s = &bcm_sysport_gstrings_stats[i]; |
504 | if (s->type == BCM_SYSPORT_STAT_NETDEV) |
505 | p = (char *)&dev->stats; |
506 | else if (s->type == BCM_SYSPORT_STAT_NETDEV64) |
507 | p = (char *)stats64; |
508 | else |
509 | p = (char *)priv; |
510 | |
511 | if (priv->is_lite && !bcm_sysport_lite_stat_valid(type: s->type)) |
512 | continue; |
513 | p += s->stat_offset; |
514 | |
515 | if (s->stat_sizeof == sizeof(u64) && |
516 | s->type == BCM_SYSPORT_STAT_NETDEV64) { |
517 | do { |
518 | start = u64_stats_fetch_begin(syncp); |
519 | data[i] = *(u64 *)p; |
520 | } while (u64_stats_fetch_retry(syncp, start)); |
521 | } else |
522 | data[i] = *(u32 *)p; |
523 | j++; |
524 | } |
525 | |
526 | /* For SYSTEMPORT Lite since we have holes in our statistics, j would |
527 | * be equal to BCM_SYSPORT_STATS_LEN at the end of the loop, but it |
528 | * needs to point to how many total statistics we have minus the |
529 | * number of per TX queue statistics |
530 | */ |
531 | j = bcm_sysport_get_sset_count(dev, string_set: ETH_SS_STATS) - |
532 | dev->num_tx_queues * NUM_SYSPORT_TXQ_STAT; |
533 | |
534 | for (i = 0; i < dev->num_tx_queues; i++) { |
535 | ring = &priv->tx_rings[i]; |
536 | data[j] = ring->packets; |
537 | j++; |
538 | data[j] = ring->bytes; |
539 | j++; |
540 | } |
541 | } |
542 | |
543 | static void bcm_sysport_get_wol(struct net_device *dev, |
544 | struct ethtool_wolinfo *wol) |
545 | { |
546 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
547 | |
548 | wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER; |
549 | wol->wolopts = priv->wolopts; |
550 | |
551 | if (!(priv->wolopts & WAKE_MAGICSECURE)) |
552 | return; |
553 | |
554 | memcpy(wol->sopass, priv->sopass, sizeof(priv->sopass)); |
555 | } |
556 | |
557 | static int bcm_sysport_set_wol(struct net_device *dev, |
558 | struct ethtool_wolinfo *wol) |
559 | { |
560 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
561 | struct device *kdev = &priv->pdev->dev; |
562 | u32 supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER; |
563 | |
564 | if (!device_can_wakeup(dev: kdev)) |
565 | return -ENOTSUPP; |
566 | |
567 | if (wol->wolopts & ~supported) |
568 | return -EINVAL; |
569 | |
570 | if (wol->wolopts & WAKE_MAGICSECURE) |
571 | memcpy(priv->sopass, wol->sopass, sizeof(priv->sopass)); |
572 | |
573 | /* Flag the device and relevant IRQ as wakeup capable */ |
574 | if (wol->wolopts) { |
575 | device_set_wakeup_enable(dev: kdev, enable: 1); |
576 | if (priv->wol_irq_disabled) |
577 | enable_irq_wake(irq: priv->wol_irq); |
578 | priv->wol_irq_disabled = 0; |
579 | } else { |
580 | device_set_wakeup_enable(dev: kdev, enable: 0); |
581 | /* Avoid unbalanced disable_irq_wake calls */ |
582 | if (!priv->wol_irq_disabled) |
583 | disable_irq_wake(irq: priv->wol_irq); |
584 | priv->wol_irq_disabled = 1; |
585 | } |
586 | |
587 | priv->wolopts = wol->wolopts; |
588 | |
589 | return 0; |
590 | } |
591 | |
592 | static void bcm_sysport_set_rx_coalesce(struct bcm_sysport_priv *priv, |
593 | u32 usecs, u32 pkts) |
594 | { |
595 | u32 reg; |
596 | |
597 | reg = rdma_readl(priv, RDMA_MBDONE_INTR); |
598 | reg &= ~(RDMA_INTR_THRESH_MASK | |
599 | RDMA_TIMEOUT_MASK << RDMA_TIMEOUT_SHIFT); |
600 | reg |= pkts; |
601 | reg |= DIV_ROUND_UP(usecs * 1000, 8192) << RDMA_TIMEOUT_SHIFT; |
602 | rdma_writel(priv, val: reg, RDMA_MBDONE_INTR); |
603 | } |
604 | |
605 | static void bcm_sysport_set_tx_coalesce(struct bcm_sysport_tx_ring *ring, |
606 | struct ethtool_coalesce *ec) |
607 | { |
608 | struct bcm_sysport_priv *priv = ring->priv; |
609 | u32 reg; |
610 | |
611 | reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(ring->index)); |
612 | reg &= ~(RING_INTR_THRESH_MASK | |
613 | RING_TIMEOUT_MASK << RING_TIMEOUT_SHIFT); |
614 | reg |= ec->tx_max_coalesced_frames; |
615 | reg |= DIV_ROUND_UP(ec->tx_coalesce_usecs * 1000, 8192) << |
616 | RING_TIMEOUT_SHIFT; |
617 | tdma_writel(priv, val: reg, TDMA_DESC_RING_INTR_CONTROL(ring->index)); |
618 | } |
619 | |
620 | static int bcm_sysport_get_coalesce(struct net_device *dev, |
621 | struct ethtool_coalesce *ec, |
622 | struct kernel_ethtool_coalesce *kernel_coal, |
623 | struct netlink_ext_ack *extack) |
624 | { |
625 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
626 | u32 reg; |
627 | |
628 | reg = tdma_readl(priv, TDMA_DESC_RING_INTR_CONTROL(0)); |
629 | |
630 | ec->tx_coalesce_usecs = (reg >> RING_TIMEOUT_SHIFT) * 8192 / 1000; |
631 | ec->tx_max_coalesced_frames = reg & RING_INTR_THRESH_MASK; |
632 | |
633 | reg = rdma_readl(priv, RDMA_MBDONE_INTR); |
634 | |
635 | ec->rx_coalesce_usecs = (reg >> RDMA_TIMEOUT_SHIFT) * 8192 / 1000; |
636 | ec->rx_max_coalesced_frames = reg & RDMA_INTR_THRESH_MASK; |
637 | ec->use_adaptive_rx_coalesce = priv->dim.use_dim; |
638 | |
639 | return 0; |
640 | } |
641 | |
642 | static int bcm_sysport_set_coalesce(struct net_device *dev, |
643 | struct ethtool_coalesce *ec, |
644 | struct kernel_ethtool_coalesce *kernel_coal, |
645 | struct netlink_ext_ack *extack) |
646 | { |
647 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
648 | struct dim_cq_moder moder; |
649 | u32 usecs, pkts; |
650 | unsigned int i; |
651 | |
652 | /* Base system clock is 125Mhz, DMA timeout is this reference clock |
653 | * divided by 1024, which yield roughly 8.192 us, our maximum value has |
654 | * to fit in the RING_TIMEOUT_MASK (16 bits). |
655 | */ |
656 | if (ec->tx_max_coalesced_frames > RING_INTR_THRESH_MASK || |
657 | ec->tx_coalesce_usecs > (RING_TIMEOUT_MASK * 8) + 1 || |
658 | ec->rx_max_coalesced_frames > RDMA_INTR_THRESH_MASK || |
659 | ec->rx_coalesce_usecs > (RDMA_TIMEOUT_MASK * 8) + 1) |
660 | return -EINVAL; |
661 | |
662 | if ((ec->tx_coalesce_usecs == 0 && ec->tx_max_coalesced_frames == 0) || |
663 | (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0)) |
664 | return -EINVAL; |
665 | |
666 | for (i = 0; i < dev->num_tx_queues; i++) |
667 | bcm_sysport_set_tx_coalesce(ring: &priv->tx_rings[i], ec); |
668 | |
669 | priv->rx_coalesce_usecs = ec->rx_coalesce_usecs; |
670 | priv->rx_max_coalesced_frames = ec->rx_max_coalesced_frames; |
671 | usecs = priv->rx_coalesce_usecs; |
672 | pkts = priv->rx_max_coalesced_frames; |
673 | |
674 | if (ec->use_adaptive_rx_coalesce && !priv->dim.use_dim) { |
675 | moder = net_dim_get_def_rx_moderation(cq_period_mode: priv->dim.dim.mode); |
676 | usecs = moder.usec; |
677 | pkts = moder.pkts; |
678 | } |
679 | |
680 | priv->dim.use_dim = ec->use_adaptive_rx_coalesce; |
681 | |
682 | /* Apply desired coalescing parameters */ |
683 | bcm_sysport_set_rx_coalesce(priv, usecs, pkts); |
684 | |
685 | return 0; |
686 | } |
687 | |
688 | static void bcm_sysport_free_cb(struct bcm_sysport_cb *cb) |
689 | { |
690 | dev_consume_skb_any(skb: cb->skb); |
691 | cb->skb = NULL; |
692 | dma_unmap_addr_set(cb, dma_addr, 0); |
693 | } |
694 | |
695 | static struct sk_buff *bcm_sysport_rx_refill(struct bcm_sysport_priv *priv, |
696 | struct bcm_sysport_cb *cb) |
697 | { |
698 | struct device *kdev = &priv->pdev->dev; |
699 | struct net_device *ndev = priv->netdev; |
700 | struct sk_buff *skb, *rx_skb; |
701 | dma_addr_t mapping; |
702 | |
703 | /* Allocate a new SKB for a new packet */ |
704 | skb = __netdev_alloc_skb(dev: priv->netdev, RX_BUF_LENGTH, |
705 | GFP_ATOMIC | __GFP_NOWARN); |
706 | if (!skb) { |
707 | priv->mib.alloc_rx_buff_failed++; |
708 | netif_err(priv, rx_err, ndev, "SKB alloc failed\n" ); |
709 | return NULL; |
710 | } |
711 | |
712 | mapping = dma_map_single(kdev, skb->data, |
713 | RX_BUF_LENGTH, DMA_FROM_DEVICE); |
714 | if (dma_mapping_error(dev: kdev, dma_addr: mapping)) { |
715 | priv->mib.rx_dma_failed++; |
716 | dev_kfree_skb_any(skb); |
717 | netif_err(priv, rx_err, ndev, "DMA mapping failure\n" ); |
718 | return NULL; |
719 | } |
720 | |
721 | /* Grab the current SKB on the ring */ |
722 | rx_skb = cb->skb; |
723 | if (likely(rx_skb)) |
724 | dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr), |
725 | RX_BUF_LENGTH, DMA_FROM_DEVICE); |
726 | |
727 | /* Put the new SKB on the ring */ |
728 | cb->skb = skb; |
729 | dma_unmap_addr_set(cb, dma_addr, mapping); |
730 | dma_desc_set_addr(priv, d: cb->bd_addr, addr: mapping); |
731 | |
732 | netif_dbg(priv, rx_status, ndev, "RX refill\n" ); |
733 | |
734 | /* Return the current SKB to the caller */ |
735 | return rx_skb; |
736 | } |
737 | |
738 | static int bcm_sysport_alloc_rx_bufs(struct bcm_sysport_priv *priv) |
739 | { |
740 | struct bcm_sysport_cb *cb; |
741 | struct sk_buff *skb; |
742 | unsigned int i; |
743 | |
744 | for (i = 0; i < priv->num_rx_bds; i++) { |
745 | cb = &priv->rx_cbs[i]; |
746 | skb = bcm_sysport_rx_refill(priv, cb); |
747 | dev_kfree_skb(skb); |
748 | if (!cb->skb) |
749 | return -ENOMEM; |
750 | } |
751 | |
752 | return 0; |
753 | } |
754 | |
755 | /* Poll the hardware for up to budget packets to process */ |
756 | static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv, |
757 | unsigned int budget) |
758 | { |
759 | struct bcm_sysport_stats64 *stats64 = &priv->stats64; |
760 | struct net_device *ndev = priv->netdev; |
761 | unsigned int processed = 0, to_process; |
762 | unsigned int processed_bytes = 0; |
763 | struct bcm_sysport_cb *cb; |
764 | struct sk_buff *skb; |
765 | unsigned int p_index; |
766 | u16 len, status; |
767 | struct bcm_rsb *rsb; |
768 | |
769 | /* Clear status before servicing to reduce spurious interrupts */ |
770 | intrl2_0_writel(priv, INTRL2_0_RDMA_MBDONE, INTRL2_CPU_CLEAR); |
771 | |
772 | /* Determine how much we should process since last call, SYSTEMPORT Lite |
773 | * groups the producer and consumer indexes into the same 32-bit |
774 | * which we access using RDMA_CONS_INDEX |
775 | */ |
776 | if (!priv->is_lite) |
777 | p_index = rdma_readl(priv, RDMA_PROD_INDEX); |
778 | else |
779 | p_index = rdma_readl(priv, RDMA_CONS_INDEX); |
780 | p_index &= RDMA_PROD_INDEX_MASK; |
781 | |
782 | to_process = (p_index - priv->rx_c_index) & RDMA_CONS_INDEX_MASK; |
783 | |
784 | netif_dbg(priv, rx_status, ndev, |
785 | "p_index=%d rx_c_index=%d to_process=%d\n" , |
786 | p_index, priv->rx_c_index, to_process); |
787 | |
788 | while ((processed < to_process) && (processed < budget)) { |
789 | cb = &priv->rx_cbs[priv->rx_read_ptr]; |
790 | skb = bcm_sysport_rx_refill(priv, cb); |
791 | |
792 | |
793 | /* We do not have a backing SKB, so we do not a corresponding |
794 | * DMA mapping for this incoming packet since |
795 | * bcm_sysport_rx_refill always either has both skb and mapping |
796 | * or none. |
797 | */ |
798 | if (unlikely(!skb)) { |
799 | netif_err(priv, rx_err, ndev, "out of memory!\n" ); |
800 | ndev->stats.rx_dropped++; |
801 | ndev->stats.rx_errors++; |
802 | goto next; |
803 | } |
804 | |
805 | /* Extract the Receive Status Block prepended */ |
806 | rsb = (struct bcm_rsb *)skb->data; |
807 | len = (rsb->rx_status_len >> DESC_LEN_SHIFT) & DESC_LEN_MASK; |
808 | status = (rsb->rx_status_len >> DESC_STATUS_SHIFT) & |
809 | DESC_STATUS_MASK; |
810 | |
811 | netif_dbg(priv, rx_status, ndev, |
812 | "p=%d, c=%d, rd_ptr=%d, len=%d, flag=0x%04x\n" , |
813 | p_index, priv->rx_c_index, priv->rx_read_ptr, |
814 | len, status); |
815 | |
816 | if (unlikely(len > RX_BUF_LENGTH)) { |
817 | netif_err(priv, rx_status, ndev, "oversized packet\n" ); |
818 | ndev->stats.rx_length_errors++; |
819 | ndev->stats.rx_errors++; |
820 | dev_kfree_skb_any(skb); |
821 | goto next; |
822 | } |
823 | |
824 | if (unlikely(!(status & DESC_EOP) || !(status & DESC_SOP))) { |
825 | netif_err(priv, rx_status, ndev, "fragmented packet!\n" ); |
826 | ndev->stats.rx_dropped++; |
827 | ndev->stats.rx_errors++; |
828 | dev_kfree_skb_any(skb); |
829 | goto next; |
830 | } |
831 | |
832 | if (unlikely(status & (RX_STATUS_ERR | RX_STATUS_OVFLOW))) { |
833 | netif_err(priv, rx_err, ndev, "error packet\n" ); |
834 | if (status & RX_STATUS_OVFLOW) |
835 | ndev->stats.rx_over_errors++; |
836 | ndev->stats.rx_dropped++; |
837 | ndev->stats.rx_errors++; |
838 | dev_kfree_skb_any(skb); |
839 | goto next; |
840 | } |
841 | |
842 | skb_put(skb, len); |
843 | |
844 | /* Hardware validated our checksum */ |
845 | if (likely(status & DESC_L4_CSUM)) |
846 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
847 | |
848 | /* Hardware pre-pends packets with 2bytes before Ethernet |
849 | * header plus we have the Receive Status Block, strip off all |
850 | * of this from the SKB. |
851 | */ |
852 | skb_pull(skb, len: sizeof(*rsb) + 2); |
853 | len -= (sizeof(*rsb) + 2); |
854 | processed_bytes += len; |
855 | |
856 | /* UniMAC may forward CRC */ |
857 | if (priv->crc_fwd) { |
858 | skb_trim(skb, len: len - ETH_FCS_LEN); |
859 | len -= ETH_FCS_LEN; |
860 | } |
861 | |
862 | skb->protocol = eth_type_trans(skb, dev: ndev); |
863 | ndev->stats.rx_packets++; |
864 | ndev->stats.rx_bytes += len; |
865 | u64_stats_update_begin(syncp: &priv->syncp); |
866 | stats64->rx_packets++; |
867 | stats64->rx_bytes += len; |
868 | u64_stats_update_end(syncp: &priv->syncp); |
869 | |
870 | napi_gro_receive(napi: &priv->napi, skb); |
871 | next: |
872 | processed++; |
873 | priv->rx_read_ptr++; |
874 | |
875 | if (priv->rx_read_ptr == priv->num_rx_bds) |
876 | priv->rx_read_ptr = 0; |
877 | } |
878 | |
879 | priv->dim.packets = processed; |
880 | priv->dim.bytes = processed_bytes; |
881 | |
882 | return processed; |
883 | } |
884 | |
885 | static void bcm_sysport_tx_reclaim_one(struct bcm_sysport_tx_ring *ring, |
886 | struct bcm_sysport_cb *cb, |
887 | unsigned int *bytes_compl, |
888 | unsigned int *pkts_compl) |
889 | { |
890 | struct bcm_sysport_priv *priv = ring->priv; |
891 | struct device *kdev = &priv->pdev->dev; |
892 | |
893 | if (cb->skb) { |
894 | *bytes_compl += cb->skb->len; |
895 | dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr), |
896 | dma_unmap_len(cb, dma_len), |
897 | DMA_TO_DEVICE); |
898 | (*pkts_compl)++; |
899 | bcm_sysport_free_cb(cb); |
900 | /* SKB fragment */ |
901 | } else if (dma_unmap_addr(cb, dma_addr)) { |
902 | *bytes_compl += dma_unmap_len(cb, dma_len); |
903 | dma_unmap_page(kdev, dma_unmap_addr(cb, dma_addr), |
904 | dma_unmap_len(cb, dma_len), DMA_TO_DEVICE); |
905 | dma_unmap_addr_set(cb, dma_addr, 0); |
906 | } |
907 | } |
908 | |
909 | /* Reclaim queued SKBs for transmission completion, lockless version */ |
910 | static unsigned int __bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv, |
911 | struct bcm_sysport_tx_ring *ring) |
912 | { |
913 | unsigned int pkts_compl = 0, bytes_compl = 0; |
914 | struct net_device *ndev = priv->netdev; |
915 | unsigned int txbds_processed = 0; |
916 | struct bcm_sysport_cb *cb; |
917 | unsigned int txbds_ready; |
918 | unsigned int c_index; |
919 | u32 hw_ind; |
920 | |
921 | /* Clear status before servicing to reduce spurious interrupts */ |
922 | if (!ring->priv->is_lite) |
923 | intrl2_1_writel(priv: ring->priv, BIT(ring->index), INTRL2_CPU_CLEAR); |
924 | else |
925 | intrl2_0_writel(priv: ring->priv, BIT(ring->index + |
926 | INTRL2_0_TDMA_MBDONE_SHIFT), INTRL2_CPU_CLEAR); |
927 | |
928 | /* Compute how many descriptors have been processed since last call */ |
929 | hw_ind = tdma_readl(priv, TDMA_DESC_RING_PROD_CONS_INDEX(ring->index)); |
930 | c_index = (hw_ind >> RING_CONS_INDEX_SHIFT) & RING_CONS_INDEX_MASK; |
931 | txbds_ready = (c_index - ring->c_index) & RING_CONS_INDEX_MASK; |
932 | |
933 | netif_dbg(priv, tx_done, ndev, |
934 | "ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n" , |
935 | ring->index, ring->c_index, c_index, txbds_ready); |
936 | |
937 | while (txbds_processed < txbds_ready) { |
938 | cb = &ring->cbs[ring->clean_index]; |
939 | bcm_sysport_tx_reclaim_one(ring, cb, bytes_compl: &bytes_compl, pkts_compl: &pkts_compl); |
940 | |
941 | ring->desc_count++; |
942 | txbds_processed++; |
943 | |
944 | if (likely(ring->clean_index < ring->size - 1)) |
945 | ring->clean_index++; |
946 | else |
947 | ring->clean_index = 0; |
948 | } |
949 | |
950 | u64_stats_update_begin(syncp: &priv->syncp); |
951 | ring->packets += pkts_compl; |
952 | ring->bytes += bytes_compl; |
953 | u64_stats_update_end(syncp: &priv->syncp); |
954 | |
955 | ring->c_index = c_index; |
956 | |
957 | netif_dbg(priv, tx_done, ndev, |
958 | "ring=%d c_index=%d pkts_compl=%d, bytes_compl=%d\n" , |
959 | ring->index, ring->c_index, pkts_compl, bytes_compl); |
960 | |
961 | return pkts_compl; |
962 | } |
963 | |
964 | /* Locked version of the per-ring TX reclaim routine */ |
965 | static unsigned int bcm_sysport_tx_reclaim(struct bcm_sysport_priv *priv, |
966 | struct bcm_sysport_tx_ring *ring) |
967 | { |
968 | struct netdev_queue *txq; |
969 | unsigned int released; |
970 | unsigned long flags; |
971 | |
972 | txq = netdev_get_tx_queue(dev: priv->netdev, index: ring->index); |
973 | |
974 | spin_lock_irqsave(&ring->lock, flags); |
975 | released = __bcm_sysport_tx_reclaim(priv, ring); |
976 | if (released) |
977 | netif_tx_wake_queue(dev_queue: txq); |
978 | |
979 | spin_unlock_irqrestore(lock: &ring->lock, flags); |
980 | |
981 | return released; |
982 | } |
983 | |
984 | /* Locked version of the per-ring TX reclaim, but does not wake the queue */ |
985 | static void bcm_sysport_tx_clean(struct bcm_sysport_priv *priv, |
986 | struct bcm_sysport_tx_ring *ring) |
987 | { |
988 | unsigned long flags; |
989 | |
990 | spin_lock_irqsave(&ring->lock, flags); |
991 | __bcm_sysport_tx_reclaim(priv, ring); |
992 | spin_unlock_irqrestore(lock: &ring->lock, flags); |
993 | } |
994 | |
995 | static int bcm_sysport_tx_poll(struct napi_struct *napi, int budget) |
996 | { |
997 | struct bcm_sysport_tx_ring *ring = |
998 | container_of(napi, struct bcm_sysport_tx_ring, napi); |
999 | unsigned int work_done = 0; |
1000 | |
1001 | work_done = bcm_sysport_tx_reclaim(priv: ring->priv, ring); |
1002 | |
1003 | if (work_done == 0) { |
1004 | napi_complete(n: napi); |
1005 | /* re-enable TX interrupt */ |
1006 | if (!ring->priv->is_lite) |
1007 | intrl2_1_mask_clear(priv: ring->priv, BIT(ring->index)); |
1008 | else |
1009 | intrl2_0_mask_clear(priv: ring->priv, BIT(ring->index + |
1010 | INTRL2_0_TDMA_MBDONE_SHIFT)); |
1011 | |
1012 | return 0; |
1013 | } |
1014 | |
1015 | return budget; |
1016 | } |
1017 | |
1018 | static void bcm_sysport_tx_reclaim_all(struct bcm_sysport_priv *priv) |
1019 | { |
1020 | unsigned int q; |
1021 | |
1022 | for (q = 0; q < priv->netdev->num_tx_queues; q++) |
1023 | bcm_sysport_tx_reclaim(priv, ring: &priv->tx_rings[q]); |
1024 | } |
1025 | |
1026 | static int bcm_sysport_poll(struct napi_struct *napi, int budget) |
1027 | { |
1028 | struct bcm_sysport_priv *priv = |
1029 | container_of(napi, struct bcm_sysport_priv, napi); |
1030 | struct dim_sample dim_sample = {}; |
1031 | unsigned int work_done = 0; |
1032 | |
1033 | work_done = bcm_sysport_desc_rx(priv, budget); |
1034 | |
1035 | priv->rx_c_index += work_done; |
1036 | priv->rx_c_index &= RDMA_CONS_INDEX_MASK; |
1037 | |
1038 | /* SYSTEMPORT Lite groups the producer/consumer index, producer is |
1039 | * maintained by HW, but writes to it will be ignore while RDMA |
1040 | * is active |
1041 | */ |
1042 | if (!priv->is_lite) |
1043 | rdma_writel(priv, val: priv->rx_c_index, RDMA_CONS_INDEX); |
1044 | else |
1045 | rdma_writel(priv, val: priv->rx_c_index << 16, RDMA_CONS_INDEX); |
1046 | |
1047 | if (work_done < budget) { |
1048 | napi_complete_done(n: napi, work_done); |
1049 | /* re-enable RX interrupts */ |
1050 | intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE); |
1051 | } |
1052 | |
1053 | if (priv->dim.use_dim) { |
1054 | dim_update_sample(event_ctr: priv->dim.event_ctr, packets: priv->dim.packets, |
1055 | bytes: priv->dim.bytes, s: &dim_sample); |
1056 | net_dim(dim: &priv->dim.dim, end_sample: dim_sample); |
1057 | } |
1058 | |
1059 | return work_done; |
1060 | } |
1061 | |
1062 | static void mpd_enable_set(struct bcm_sysport_priv *priv, bool enable) |
1063 | { |
1064 | u32 reg, bit; |
1065 | |
1066 | reg = umac_readl(priv, UMAC_MPD_CTRL); |
1067 | if (enable) |
1068 | reg |= MPD_EN; |
1069 | else |
1070 | reg &= ~MPD_EN; |
1071 | umac_writel(priv, val: reg, UMAC_MPD_CTRL); |
1072 | |
1073 | if (priv->is_lite) |
1074 | bit = RBUF_ACPI_EN_LITE; |
1075 | else |
1076 | bit = RBUF_ACPI_EN; |
1077 | |
1078 | reg = rbuf_readl(priv, RBUF_CONTROL); |
1079 | if (enable) |
1080 | reg |= bit; |
1081 | else |
1082 | reg &= ~bit; |
1083 | rbuf_writel(priv, val: reg, RBUF_CONTROL); |
1084 | } |
1085 | |
1086 | static void bcm_sysport_resume_from_wol(struct bcm_sysport_priv *priv) |
1087 | { |
1088 | unsigned int index; |
1089 | u32 reg; |
1090 | |
1091 | /* Disable RXCHK, active filters and Broadcom tag matching */ |
1092 | reg = rxchk_readl(priv, RXCHK_CONTROL); |
1093 | reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK << |
1094 | RXCHK_BRCM_TAG_MATCH_SHIFT | RXCHK_EN | RXCHK_BRCM_TAG_EN); |
1095 | rxchk_writel(priv, val: reg, RXCHK_CONTROL); |
1096 | |
1097 | /* Make sure we restore correct CID index in case HW lost |
1098 | * its context during deep idle state |
1099 | */ |
1100 | for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) { |
1101 | rxchk_writel(priv, val: priv->filters_loc[index] << |
1102 | RXCHK_BRCM_TAG_CID_SHIFT, RXCHK_BRCM_TAG(index)); |
1103 | rxchk_writel(priv, val: 0xff00ffff, RXCHK_BRCM_TAG_MASK(index)); |
1104 | } |
1105 | |
1106 | /* Clear the MagicPacket detection logic */ |
1107 | mpd_enable_set(priv, enable: false); |
1108 | |
1109 | reg = intrl2_0_readl(priv, INTRL2_CPU_STATUS); |
1110 | if (reg & INTRL2_0_MPD) |
1111 | netdev_info(dev: priv->netdev, format: "Wake-on-LAN (MPD) interrupt!\n" ); |
1112 | |
1113 | if (reg & INTRL2_0_BRCM_MATCH_TAG) { |
1114 | reg = rxchk_readl(priv, RXCHK_BRCM_TAG_MATCH_STATUS) & |
1115 | RXCHK_BRCM_TAG_MATCH_MASK; |
1116 | netdev_info(dev: priv->netdev, |
1117 | format: "Wake-on-LAN (filters 0x%02x) interrupt!\n" , reg); |
1118 | } |
1119 | |
1120 | netif_dbg(priv, wol, priv->netdev, "resumed from WOL\n" ); |
1121 | } |
1122 | |
1123 | static void bcm_sysport_dim_work(struct work_struct *work) |
1124 | { |
1125 | struct dim *dim = container_of(work, struct dim, work); |
1126 | struct bcm_sysport_net_dim *ndim = |
1127 | container_of(dim, struct bcm_sysport_net_dim, dim); |
1128 | struct bcm_sysport_priv *priv = |
1129 | container_of(ndim, struct bcm_sysport_priv, dim); |
1130 | struct dim_cq_moder cur_profile = net_dim_get_rx_moderation(cq_period_mode: dim->mode, |
1131 | ix: dim->profile_ix); |
1132 | |
1133 | bcm_sysport_set_rx_coalesce(priv, usecs: cur_profile.usec, pkts: cur_profile.pkts); |
1134 | dim->state = DIM_START_MEASURE; |
1135 | } |
1136 | |
1137 | /* RX and misc interrupt routine */ |
1138 | static irqreturn_t bcm_sysport_rx_isr(int irq, void *dev_id) |
1139 | { |
1140 | struct net_device *dev = dev_id; |
1141 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
1142 | struct bcm_sysport_tx_ring *txr; |
1143 | unsigned int ring, ring_bit; |
1144 | |
1145 | priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) & |
1146 | ~intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS); |
1147 | intrl2_0_writel(priv, val: priv->irq0_stat, INTRL2_CPU_CLEAR); |
1148 | |
1149 | if (unlikely(priv->irq0_stat == 0)) { |
1150 | netdev_warn(dev: priv->netdev, format: "spurious RX interrupt\n" ); |
1151 | return IRQ_NONE; |
1152 | } |
1153 | |
1154 | if (priv->irq0_stat & INTRL2_0_RDMA_MBDONE) { |
1155 | priv->dim.event_ctr++; |
1156 | if (likely(napi_schedule_prep(&priv->napi))) { |
1157 | /* disable RX interrupts */ |
1158 | intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE); |
1159 | __napi_schedule_irqoff(n: &priv->napi); |
1160 | } |
1161 | } |
1162 | |
1163 | /* TX ring is full, perform a full reclaim since we do not know |
1164 | * which one would trigger this interrupt |
1165 | */ |
1166 | if (priv->irq0_stat & INTRL2_0_TX_RING_FULL) |
1167 | bcm_sysport_tx_reclaim_all(priv); |
1168 | |
1169 | if (!priv->is_lite) |
1170 | goto out; |
1171 | |
1172 | for (ring = 0; ring < dev->num_tx_queues; ring++) { |
1173 | ring_bit = BIT(ring + INTRL2_0_TDMA_MBDONE_SHIFT); |
1174 | if (!(priv->irq0_stat & ring_bit)) |
1175 | continue; |
1176 | |
1177 | txr = &priv->tx_rings[ring]; |
1178 | |
1179 | if (likely(napi_schedule_prep(&txr->napi))) { |
1180 | intrl2_0_mask_set(priv, mask: ring_bit); |
1181 | __napi_schedule(n: &txr->napi); |
1182 | } |
1183 | } |
1184 | out: |
1185 | return IRQ_HANDLED; |
1186 | } |
1187 | |
1188 | /* TX interrupt service routine */ |
1189 | static irqreturn_t bcm_sysport_tx_isr(int irq, void *dev_id) |
1190 | { |
1191 | struct net_device *dev = dev_id; |
1192 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
1193 | struct bcm_sysport_tx_ring *txr; |
1194 | unsigned int ring; |
1195 | |
1196 | priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) & |
1197 | ~intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS); |
1198 | intrl2_1_writel(priv, val: 0xffffffff, INTRL2_CPU_CLEAR); |
1199 | |
1200 | if (unlikely(priv->irq1_stat == 0)) { |
1201 | netdev_warn(dev: priv->netdev, format: "spurious TX interrupt\n" ); |
1202 | return IRQ_NONE; |
1203 | } |
1204 | |
1205 | for (ring = 0; ring < dev->num_tx_queues; ring++) { |
1206 | if (!(priv->irq1_stat & BIT(ring))) |
1207 | continue; |
1208 | |
1209 | txr = &priv->tx_rings[ring]; |
1210 | |
1211 | if (likely(napi_schedule_prep(&txr->napi))) { |
1212 | intrl2_1_mask_set(priv, BIT(ring)); |
1213 | __napi_schedule_irqoff(n: &txr->napi); |
1214 | } |
1215 | } |
1216 | |
1217 | return IRQ_HANDLED; |
1218 | } |
1219 | |
1220 | static irqreturn_t bcm_sysport_wol_isr(int irq, void *dev_id) |
1221 | { |
1222 | struct bcm_sysport_priv *priv = dev_id; |
1223 | |
1224 | pm_wakeup_event(dev: &priv->pdev->dev, msec: 0); |
1225 | |
1226 | return IRQ_HANDLED; |
1227 | } |
1228 | |
1229 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1230 | static void bcm_sysport_poll_controller(struct net_device *dev) |
1231 | { |
1232 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
1233 | |
1234 | disable_irq(irq: priv->irq0); |
1235 | bcm_sysport_rx_isr(irq: priv->irq0, dev_id: priv); |
1236 | enable_irq(irq: priv->irq0); |
1237 | |
1238 | if (!priv->is_lite) { |
1239 | disable_irq(irq: priv->irq1); |
1240 | bcm_sysport_tx_isr(irq: priv->irq1, dev_id: priv); |
1241 | enable_irq(irq: priv->irq1); |
1242 | } |
1243 | } |
1244 | #endif |
1245 | |
1246 | static struct sk_buff *bcm_sysport_insert_tsb(struct sk_buff *skb, |
1247 | struct net_device *dev) |
1248 | { |
1249 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
1250 | struct sk_buff *nskb; |
1251 | struct bcm_tsb *tsb; |
1252 | u32 csum_info; |
1253 | u8 ip_proto; |
1254 | u16 csum_start; |
1255 | __be16 ip_ver; |
1256 | |
1257 | /* Re-allocate SKB if needed */ |
1258 | if (unlikely(skb_headroom(skb) < sizeof(*tsb))) { |
1259 | nskb = skb_realloc_headroom(skb, headroom: sizeof(*tsb)); |
1260 | if (!nskb) { |
1261 | dev_kfree_skb_any(skb); |
1262 | priv->mib.tx_realloc_tsb_failed++; |
1263 | dev->stats.tx_errors++; |
1264 | dev->stats.tx_dropped++; |
1265 | return NULL; |
1266 | } |
1267 | dev_consume_skb_any(skb); |
1268 | skb = nskb; |
1269 | priv->mib.tx_realloc_tsb++; |
1270 | } |
1271 | |
1272 | tsb = skb_push(skb, len: sizeof(*tsb)); |
1273 | /* Zero-out TSB by default */ |
1274 | memset(tsb, 0, sizeof(*tsb)); |
1275 | |
1276 | if (skb_vlan_tag_present(skb)) { |
1277 | tsb->pcp_dei_vid = skb_vlan_tag_get_prio(skb) & PCP_DEI_MASK; |
1278 | tsb->pcp_dei_vid |= (u32)skb_vlan_tag_get_id(skb) << VID_SHIFT; |
1279 | } |
1280 | |
1281 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
1282 | ip_ver = skb->protocol; |
1283 | switch (ip_ver) { |
1284 | case htons(ETH_P_IP): |
1285 | ip_proto = ip_hdr(skb)->protocol; |
1286 | break; |
1287 | case htons(ETH_P_IPV6): |
1288 | ip_proto = ipv6_hdr(skb)->nexthdr; |
1289 | break; |
1290 | default: |
1291 | return skb; |
1292 | } |
1293 | |
1294 | /* Get the checksum offset and the L4 (transport) offset */ |
1295 | csum_start = skb_checksum_start_offset(skb) - sizeof(*tsb); |
1296 | /* Account for the HW inserted VLAN tag */ |
1297 | if (skb_vlan_tag_present(skb)) |
1298 | csum_start += VLAN_HLEN; |
1299 | csum_info = (csum_start + skb->csum_offset) & L4_CSUM_PTR_MASK; |
1300 | csum_info |= (csum_start << L4_PTR_SHIFT); |
1301 | |
1302 | if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) { |
1303 | csum_info |= L4_LENGTH_VALID; |
1304 | if (ip_proto == IPPROTO_UDP && |
1305 | ip_ver == htons(ETH_P_IP)) |
1306 | csum_info |= L4_UDP; |
1307 | } else { |
1308 | csum_info = 0; |
1309 | } |
1310 | |
1311 | tsb->l4_ptr_dest_map = csum_info; |
1312 | } |
1313 | |
1314 | return skb; |
1315 | } |
1316 | |
1317 | static netdev_tx_t bcm_sysport_xmit(struct sk_buff *skb, |
1318 | struct net_device *dev) |
1319 | { |
1320 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
1321 | struct device *kdev = &priv->pdev->dev; |
1322 | struct bcm_sysport_tx_ring *ring; |
1323 | unsigned long flags, desc_flags; |
1324 | struct bcm_sysport_cb *cb; |
1325 | struct netdev_queue *txq; |
1326 | u32 len_status, addr_lo; |
1327 | unsigned int skb_len; |
1328 | dma_addr_t mapping; |
1329 | u16 queue; |
1330 | int ret; |
1331 | |
1332 | queue = skb_get_queue_mapping(skb); |
1333 | txq = netdev_get_tx_queue(dev, index: queue); |
1334 | ring = &priv->tx_rings[queue]; |
1335 | |
1336 | /* lock against tx reclaim in BH context and TX ring full interrupt */ |
1337 | spin_lock_irqsave(&ring->lock, flags); |
1338 | if (unlikely(ring->desc_count == 0)) { |
1339 | netif_tx_stop_queue(dev_queue: txq); |
1340 | netdev_err(dev, format: "queue %d awake and ring full!\n" , queue); |
1341 | ret = NETDEV_TX_BUSY; |
1342 | goto out; |
1343 | } |
1344 | |
1345 | /* Insert TSB and checksum infos */ |
1346 | if (priv->tsb_en) { |
1347 | skb = bcm_sysport_insert_tsb(skb, dev); |
1348 | if (!skb) { |
1349 | ret = NETDEV_TX_OK; |
1350 | goto out; |
1351 | } |
1352 | } |
1353 | |
1354 | skb_len = skb->len; |
1355 | |
1356 | mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE); |
1357 | if (dma_mapping_error(dev: kdev, dma_addr: mapping)) { |
1358 | priv->mib.tx_dma_failed++; |
1359 | netif_err(priv, tx_err, dev, "DMA map failed at %p (len=%d)\n" , |
1360 | skb->data, skb_len); |
1361 | ret = NETDEV_TX_OK; |
1362 | goto out; |
1363 | } |
1364 | |
1365 | /* Remember the SKB for future freeing */ |
1366 | cb = &ring->cbs[ring->curr_desc]; |
1367 | cb->skb = skb; |
1368 | dma_unmap_addr_set(cb, dma_addr, mapping); |
1369 | dma_unmap_len_set(cb, dma_len, skb_len); |
1370 | |
1371 | addr_lo = lower_32_bits(mapping); |
1372 | len_status = upper_32_bits(mapping) & DESC_ADDR_HI_MASK; |
1373 | len_status |= (skb_len << DESC_LEN_SHIFT); |
1374 | len_status |= (DESC_SOP | DESC_EOP | TX_STATUS_APP_CRC) << |
1375 | DESC_STATUS_SHIFT; |
1376 | if (skb->ip_summed == CHECKSUM_PARTIAL) |
1377 | len_status |= (DESC_L4_CSUM << DESC_STATUS_SHIFT); |
1378 | if (skb_vlan_tag_present(skb)) |
1379 | len_status |= (TX_STATUS_VLAN_VID_TSB << DESC_STATUS_SHIFT); |
1380 | |
1381 | ring->curr_desc++; |
1382 | if (ring->curr_desc == ring->size) |
1383 | ring->curr_desc = 0; |
1384 | ring->desc_count--; |
1385 | |
1386 | /* Ports are latched, so write upper address first */ |
1387 | spin_lock_irqsave(&priv->desc_lock, desc_flags); |
1388 | tdma_writel(priv, val: len_status, TDMA_WRITE_PORT_HI(ring->index)); |
1389 | tdma_writel(priv, val: addr_lo, TDMA_WRITE_PORT_LO(ring->index)); |
1390 | spin_unlock_irqrestore(lock: &priv->desc_lock, flags: desc_flags); |
1391 | |
1392 | /* Check ring space and update SW control flow */ |
1393 | if (ring->desc_count == 0) |
1394 | netif_tx_stop_queue(dev_queue: txq); |
1395 | |
1396 | netif_dbg(priv, tx_queued, dev, "ring=%d desc_count=%d, curr_desc=%d\n" , |
1397 | ring->index, ring->desc_count, ring->curr_desc); |
1398 | |
1399 | ret = NETDEV_TX_OK; |
1400 | out: |
1401 | spin_unlock_irqrestore(lock: &ring->lock, flags); |
1402 | return ret; |
1403 | } |
1404 | |
1405 | static void bcm_sysport_tx_timeout(struct net_device *dev, unsigned int txqueue) |
1406 | { |
1407 | netdev_warn(dev, format: "transmit timeout!\n" ); |
1408 | |
1409 | netif_trans_update(dev); |
1410 | dev->stats.tx_errors++; |
1411 | |
1412 | netif_tx_wake_all_queues(dev); |
1413 | } |
1414 | |
1415 | /* phylib adjust link callback */ |
1416 | static void bcm_sysport_adj_link(struct net_device *dev) |
1417 | { |
1418 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
1419 | struct phy_device *phydev = dev->phydev; |
1420 | unsigned int changed = 0; |
1421 | u32 cmd_bits = 0, reg; |
1422 | |
1423 | if (priv->old_link != phydev->link) { |
1424 | changed = 1; |
1425 | priv->old_link = phydev->link; |
1426 | } |
1427 | |
1428 | if (priv->old_duplex != phydev->duplex) { |
1429 | changed = 1; |
1430 | priv->old_duplex = phydev->duplex; |
1431 | } |
1432 | |
1433 | if (priv->is_lite) |
1434 | goto out; |
1435 | |
1436 | switch (phydev->speed) { |
1437 | case SPEED_2500: |
1438 | cmd_bits = CMD_SPEED_2500; |
1439 | break; |
1440 | case SPEED_1000: |
1441 | cmd_bits = CMD_SPEED_1000; |
1442 | break; |
1443 | case SPEED_100: |
1444 | cmd_bits = CMD_SPEED_100; |
1445 | break; |
1446 | case SPEED_10: |
1447 | cmd_bits = CMD_SPEED_10; |
1448 | break; |
1449 | default: |
1450 | break; |
1451 | } |
1452 | cmd_bits <<= CMD_SPEED_SHIFT; |
1453 | |
1454 | if (phydev->duplex == DUPLEX_HALF) |
1455 | cmd_bits |= CMD_HD_EN; |
1456 | |
1457 | if (priv->old_pause != phydev->pause) { |
1458 | changed = 1; |
1459 | priv->old_pause = phydev->pause; |
1460 | } |
1461 | |
1462 | if (!phydev->pause) |
1463 | cmd_bits |= CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE; |
1464 | |
1465 | if (!changed) |
1466 | return; |
1467 | |
1468 | if (phydev->link) { |
1469 | reg = umac_readl(priv, UMAC_CMD); |
1470 | reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) | |
1471 | CMD_HD_EN | CMD_RX_PAUSE_IGNORE | |
1472 | CMD_TX_PAUSE_IGNORE); |
1473 | reg |= cmd_bits; |
1474 | umac_writel(priv, val: reg, UMAC_CMD); |
1475 | } |
1476 | out: |
1477 | if (changed) |
1478 | phy_print_status(phydev); |
1479 | } |
1480 | |
1481 | static void bcm_sysport_init_dim(struct bcm_sysport_priv *priv, |
1482 | void (*cb)(struct work_struct *work)) |
1483 | { |
1484 | struct bcm_sysport_net_dim *dim = &priv->dim; |
1485 | |
1486 | INIT_WORK(&dim->dim.work, cb); |
1487 | dim->dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE; |
1488 | dim->event_ctr = 0; |
1489 | dim->packets = 0; |
1490 | dim->bytes = 0; |
1491 | } |
1492 | |
1493 | static void bcm_sysport_init_rx_coalesce(struct bcm_sysport_priv *priv) |
1494 | { |
1495 | struct bcm_sysport_net_dim *dim = &priv->dim; |
1496 | struct dim_cq_moder moder; |
1497 | u32 usecs, pkts; |
1498 | |
1499 | usecs = priv->rx_coalesce_usecs; |
1500 | pkts = priv->rx_max_coalesced_frames; |
1501 | |
1502 | /* If DIM was enabled, re-apply default parameters */ |
1503 | if (dim->use_dim) { |
1504 | moder = net_dim_get_def_rx_moderation(cq_period_mode: dim->dim.mode); |
1505 | usecs = moder.usec; |
1506 | pkts = moder.pkts; |
1507 | } |
1508 | |
1509 | bcm_sysport_set_rx_coalesce(priv, usecs, pkts); |
1510 | } |
1511 | |
1512 | static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv, |
1513 | unsigned int index) |
1514 | { |
1515 | struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index]; |
1516 | size_t size; |
1517 | u32 reg; |
1518 | |
1519 | /* Simple descriptors partitioning for now */ |
1520 | size = 256; |
1521 | |
1522 | ring->cbs = kcalloc(n: size, size: sizeof(struct bcm_sysport_cb), GFP_KERNEL); |
1523 | if (!ring->cbs) { |
1524 | netif_err(priv, hw, priv->netdev, "CB allocation failed\n" ); |
1525 | return -ENOMEM; |
1526 | } |
1527 | |
1528 | /* Initialize SW view of the ring */ |
1529 | spin_lock_init(&ring->lock); |
1530 | ring->priv = priv; |
1531 | netif_napi_add_tx(dev: priv->netdev, napi: &ring->napi, poll: bcm_sysport_tx_poll); |
1532 | ring->index = index; |
1533 | ring->size = size; |
1534 | ring->clean_index = 0; |
1535 | ring->alloc_size = ring->size; |
1536 | ring->desc_count = ring->size; |
1537 | ring->curr_desc = 0; |
1538 | |
1539 | /* Initialize HW ring */ |
1540 | tdma_writel(priv, RING_EN, TDMA_DESC_RING_HEAD_TAIL_PTR(index)); |
1541 | tdma_writel(priv, val: 0, TDMA_DESC_RING_COUNT(index)); |
1542 | tdma_writel(priv, val: 1, TDMA_DESC_RING_INTR_CONTROL(index)); |
1543 | tdma_writel(priv, val: 0, TDMA_DESC_RING_PROD_CONS_INDEX(index)); |
1544 | |
1545 | /* Configure QID and port mapping */ |
1546 | reg = tdma_readl(priv, TDMA_DESC_RING_MAPPING(index)); |
1547 | reg &= ~(RING_QID_MASK | RING_PORT_ID_MASK << RING_PORT_ID_SHIFT); |
1548 | if (ring->inspect) { |
1549 | reg |= ring->switch_queue & RING_QID_MASK; |
1550 | reg |= ring->switch_port << RING_PORT_ID_SHIFT; |
1551 | } else { |
1552 | reg |= RING_IGNORE_STATUS; |
1553 | } |
1554 | tdma_writel(priv, val: reg, TDMA_DESC_RING_MAPPING(index)); |
1555 | reg = 0; |
1556 | /* Adjust the packet size calculations if SYSTEMPORT is responsible |
1557 | * for HW insertion of VLAN tags |
1558 | */ |
1559 | if (priv->netdev->features & NETIF_F_HW_VLAN_CTAG_TX) |
1560 | reg = VLAN_HLEN << RING_PKT_SIZE_ADJ_SHIFT; |
1561 | tdma_writel(priv, val: reg, TDMA_DESC_RING_PCP_DEI_VID(index)); |
1562 | |
1563 | /* Enable ACB algorithm 2 */ |
1564 | reg = tdma_readl(priv, TDMA_CONTROL); |
1565 | reg |= tdma_control_bit(priv, ACB_ALGO); |
1566 | tdma_writel(priv, val: reg, TDMA_CONTROL); |
1567 | |
1568 | /* Do not use tdma_control_bit() here because TSB_SWAP1 collides |
1569 | * with the original definition of ACB_ALGO |
1570 | */ |
1571 | reg = tdma_readl(priv, TDMA_CONTROL); |
1572 | if (priv->is_lite) |
1573 | reg &= ~BIT(TSB_SWAP1); |
1574 | /* Set a correct TSB format based on host endian */ |
1575 | if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)) |
1576 | reg |= tdma_control_bit(priv, TSB_SWAP0); |
1577 | else |
1578 | reg &= ~tdma_control_bit(priv, TSB_SWAP0); |
1579 | tdma_writel(priv, val: reg, TDMA_CONTROL); |
1580 | |
1581 | /* Program the number of descriptors as MAX_THRESHOLD and half of |
1582 | * its size for the hysteresis trigger |
1583 | */ |
1584 | tdma_writel(priv, val: ring->size | |
1585 | 1 << RING_HYST_THRESH_SHIFT, |
1586 | TDMA_DESC_RING_MAX_HYST(index)); |
1587 | |
1588 | /* Enable the ring queue in the arbiter */ |
1589 | reg = tdma_readl(priv, TDMA_TIER1_ARB_0_QUEUE_EN); |
1590 | reg |= (1 << index); |
1591 | tdma_writel(priv, val: reg, TDMA_TIER1_ARB_0_QUEUE_EN); |
1592 | |
1593 | napi_enable(n: &ring->napi); |
1594 | |
1595 | netif_dbg(priv, hw, priv->netdev, |
1596 | "TDMA cfg, size=%d, switch q=%d,port=%d\n" , |
1597 | ring->size, ring->switch_queue, |
1598 | ring->switch_port); |
1599 | |
1600 | return 0; |
1601 | } |
1602 | |
1603 | static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv, |
1604 | unsigned int index) |
1605 | { |
1606 | struct bcm_sysport_tx_ring *ring = &priv->tx_rings[index]; |
1607 | u32 reg; |
1608 | |
1609 | /* Caller should stop the TDMA engine */ |
1610 | reg = tdma_readl(priv, TDMA_STATUS); |
1611 | if (!(reg & TDMA_DISABLED)) |
1612 | netdev_warn(dev: priv->netdev, format: "TDMA not stopped!\n" ); |
1613 | |
1614 | /* ring->cbs is the last part in bcm_sysport_init_tx_ring which could |
1615 | * fail, so by checking this pointer we know whether the TX ring was |
1616 | * fully initialized or not. |
1617 | */ |
1618 | if (!ring->cbs) |
1619 | return; |
1620 | |
1621 | napi_disable(n: &ring->napi); |
1622 | netif_napi_del(napi: &ring->napi); |
1623 | |
1624 | bcm_sysport_tx_clean(priv, ring); |
1625 | |
1626 | kfree(objp: ring->cbs); |
1627 | ring->cbs = NULL; |
1628 | ring->size = 0; |
1629 | ring->alloc_size = 0; |
1630 | |
1631 | netif_dbg(priv, hw, priv->netdev, "TDMA fini done\n" ); |
1632 | } |
1633 | |
1634 | /* RDMA helper */ |
1635 | static inline int rdma_enable_set(struct bcm_sysport_priv *priv, |
1636 | unsigned int enable) |
1637 | { |
1638 | unsigned int timeout = 1000; |
1639 | u32 reg; |
1640 | |
1641 | reg = rdma_readl(priv, RDMA_CONTROL); |
1642 | if (enable) |
1643 | reg |= RDMA_EN; |
1644 | else |
1645 | reg &= ~RDMA_EN; |
1646 | rdma_writel(priv, val: reg, RDMA_CONTROL); |
1647 | |
1648 | /* Poll for RMDA disabling completion */ |
1649 | do { |
1650 | reg = rdma_readl(priv, RDMA_STATUS); |
1651 | if (!!(reg & RDMA_DISABLED) == !enable) |
1652 | return 0; |
1653 | usleep_range(min: 1000, max: 2000); |
1654 | } while (timeout-- > 0); |
1655 | |
1656 | netdev_err(dev: priv->netdev, format: "timeout waiting for RDMA to finish\n" ); |
1657 | |
1658 | return -ETIMEDOUT; |
1659 | } |
1660 | |
1661 | /* TDMA helper */ |
1662 | static inline int tdma_enable_set(struct bcm_sysport_priv *priv, |
1663 | unsigned int enable) |
1664 | { |
1665 | unsigned int timeout = 1000; |
1666 | u32 reg; |
1667 | |
1668 | reg = tdma_readl(priv, TDMA_CONTROL); |
1669 | if (enable) |
1670 | reg |= tdma_control_bit(priv, TDMA_EN); |
1671 | else |
1672 | reg &= ~tdma_control_bit(priv, TDMA_EN); |
1673 | tdma_writel(priv, val: reg, TDMA_CONTROL); |
1674 | |
1675 | /* Poll for TMDA disabling completion */ |
1676 | do { |
1677 | reg = tdma_readl(priv, TDMA_STATUS); |
1678 | if (!!(reg & TDMA_DISABLED) == !enable) |
1679 | return 0; |
1680 | |
1681 | usleep_range(min: 1000, max: 2000); |
1682 | } while (timeout-- > 0); |
1683 | |
1684 | netdev_err(dev: priv->netdev, format: "timeout waiting for TDMA to finish\n" ); |
1685 | |
1686 | return -ETIMEDOUT; |
1687 | } |
1688 | |
1689 | static int bcm_sysport_init_rx_ring(struct bcm_sysport_priv *priv) |
1690 | { |
1691 | struct bcm_sysport_cb *cb; |
1692 | u32 reg; |
1693 | int ret; |
1694 | int i; |
1695 | |
1696 | /* Initialize SW view of the RX ring */ |
1697 | priv->num_rx_bds = priv->num_rx_desc_words / WORDS_PER_DESC; |
1698 | priv->rx_bds = priv->base + SYS_PORT_RDMA_OFFSET; |
1699 | priv->rx_c_index = 0; |
1700 | priv->rx_read_ptr = 0; |
1701 | priv->rx_cbs = kcalloc(n: priv->num_rx_bds, size: sizeof(struct bcm_sysport_cb), |
1702 | GFP_KERNEL); |
1703 | if (!priv->rx_cbs) { |
1704 | netif_err(priv, hw, priv->netdev, "CB allocation failed\n" ); |
1705 | return -ENOMEM; |
1706 | } |
1707 | |
1708 | for (i = 0; i < priv->num_rx_bds; i++) { |
1709 | cb = priv->rx_cbs + i; |
1710 | cb->bd_addr = priv->rx_bds + i * DESC_SIZE; |
1711 | } |
1712 | |
1713 | ret = bcm_sysport_alloc_rx_bufs(priv); |
1714 | if (ret) { |
1715 | netif_err(priv, hw, priv->netdev, "SKB allocation failed\n" ); |
1716 | return ret; |
1717 | } |
1718 | |
1719 | /* Initialize HW, ensure RDMA is disabled */ |
1720 | reg = rdma_readl(priv, RDMA_STATUS); |
1721 | if (!(reg & RDMA_DISABLED)) |
1722 | rdma_enable_set(priv, enable: 0); |
1723 | |
1724 | rdma_writel(priv, val: 0, RDMA_WRITE_PTR_LO); |
1725 | rdma_writel(priv, val: 0, RDMA_WRITE_PTR_HI); |
1726 | rdma_writel(priv, val: 0, RDMA_PROD_INDEX); |
1727 | rdma_writel(priv, val: 0, RDMA_CONS_INDEX); |
1728 | rdma_writel(priv, val: priv->num_rx_bds << RDMA_RING_SIZE_SHIFT | |
1729 | RX_BUF_LENGTH, RDMA_RING_BUF_SIZE); |
1730 | /* Operate the queue in ring mode */ |
1731 | rdma_writel(priv, val: 0, RDMA_START_ADDR_HI); |
1732 | rdma_writel(priv, val: 0, RDMA_START_ADDR_LO); |
1733 | rdma_writel(priv, val: 0, RDMA_END_ADDR_HI); |
1734 | rdma_writel(priv, val: priv->num_rx_desc_words - 1, RDMA_END_ADDR_LO); |
1735 | |
1736 | netif_dbg(priv, hw, priv->netdev, |
1737 | "RDMA cfg, num_rx_bds=%d, rx_bds=%p\n" , |
1738 | priv->num_rx_bds, priv->rx_bds); |
1739 | |
1740 | return 0; |
1741 | } |
1742 | |
1743 | static void bcm_sysport_fini_rx_ring(struct bcm_sysport_priv *priv) |
1744 | { |
1745 | struct bcm_sysport_cb *cb; |
1746 | unsigned int i; |
1747 | u32 reg; |
1748 | |
1749 | /* Caller should ensure RDMA is disabled */ |
1750 | reg = rdma_readl(priv, RDMA_STATUS); |
1751 | if (!(reg & RDMA_DISABLED)) |
1752 | netdev_warn(dev: priv->netdev, format: "RDMA not stopped!\n" ); |
1753 | |
1754 | for (i = 0; i < priv->num_rx_bds; i++) { |
1755 | cb = &priv->rx_cbs[i]; |
1756 | if (dma_unmap_addr(cb, dma_addr)) |
1757 | dma_unmap_single(&priv->pdev->dev, |
1758 | dma_unmap_addr(cb, dma_addr), |
1759 | RX_BUF_LENGTH, DMA_FROM_DEVICE); |
1760 | bcm_sysport_free_cb(cb); |
1761 | } |
1762 | |
1763 | kfree(objp: priv->rx_cbs); |
1764 | priv->rx_cbs = NULL; |
1765 | |
1766 | netif_dbg(priv, hw, priv->netdev, "RDMA fini done\n" ); |
1767 | } |
1768 | |
1769 | static void bcm_sysport_set_rx_mode(struct net_device *dev) |
1770 | { |
1771 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
1772 | u32 reg; |
1773 | |
1774 | if (priv->is_lite) |
1775 | return; |
1776 | |
1777 | reg = umac_readl(priv, UMAC_CMD); |
1778 | if (dev->flags & IFF_PROMISC) |
1779 | reg |= CMD_PROMISC; |
1780 | else |
1781 | reg &= ~CMD_PROMISC; |
1782 | umac_writel(priv, val: reg, UMAC_CMD); |
1783 | |
1784 | /* No support for ALLMULTI */ |
1785 | if (dev->flags & IFF_ALLMULTI) |
1786 | return; |
1787 | } |
1788 | |
1789 | static inline void umac_enable_set(struct bcm_sysport_priv *priv, |
1790 | u32 mask, unsigned int enable) |
1791 | { |
1792 | u32 reg; |
1793 | |
1794 | if (!priv->is_lite) { |
1795 | reg = umac_readl(priv, UMAC_CMD); |
1796 | if (enable) |
1797 | reg |= mask; |
1798 | else |
1799 | reg &= ~mask; |
1800 | umac_writel(priv, val: reg, UMAC_CMD); |
1801 | } else { |
1802 | reg = gib_readl(priv, GIB_CONTROL); |
1803 | if (enable) |
1804 | reg |= mask; |
1805 | else |
1806 | reg &= ~mask; |
1807 | gib_writel(priv, val: reg, GIB_CONTROL); |
1808 | } |
1809 | |
1810 | /* UniMAC stops on a packet boundary, wait for a full-sized packet |
1811 | * to be processed (1 msec). |
1812 | */ |
1813 | if (enable == 0) |
1814 | usleep_range(min: 1000, max: 2000); |
1815 | } |
1816 | |
1817 | static inline void umac_reset(struct bcm_sysport_priv *priv) |
1818 | { |
1819 | u32 reg; |
1820 | |
1821 | if (priv->is_lite) |
1822 | return; |
1823 | |
1824 | reg = umac_readl(priv, UMAC_CMD); |
1825 | reg |= CMD_SW_RESET; |
1826 | umac_writel(priv, val: reg, UMAC_CMD); |
1827 | udelay(10); |
1828 | reg = umac_readl(priv, UMAC_CMD); |
1829 | reg &= ~CMD_SW_RESET; |
1830 | umac_writel(priv, val: reg, UMAC_CMD); |
1831 | } |
1832 | |
1833 | static void umac_set_hw_addr(struct bcm_sysport_priv *priv, |
1834 | const unsigned char *addr) |
1835 | { |
1836 | u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | |
1837 | addr[3]; |
1838 | u32 mac1 = (addr[4] << 8) | addr[5]; |
1839 | |
1840 | if (!priv->is_lite) { |
1841 | umac_writel(priv, val: mac0, UMAC_MAC0); |
1842 | umac_writel(priv, val: mac1, UMAC_MAC1); |
1843 | } else { |
1844 | gib_writel(priv, val: mac0, GIB_MAC0); |
1845 | gib_writel(priv, val: mac1, GIB_MAC1); |
1846 | } |
1847 | } |
1848 | |
1849 | static void topctrl_flush(struct bcm_sysport_priv *priv) |
1850 | { |
1851 | topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL); |
1852 | topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL); |
1853 | mdelay(1); |
1854 | topctrl_writel(priv, val: 0, RX_FLUSH_CNTL); |
1855 | topctrl_writel(priv, val: 0, TX_FLUSH_CNTL); |
1856 | } |
1857 | |
1858 | static int bcm_sysport_change_mac(struct net_device *dev, void *p) |
1859 | { |
1860 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
1861 | struct sockaddr *addr = p; |
1862 | |
1863 | if (!is_valid_ether_addr(addr: addr->sa_data)) |
1864 | return -EINVAL; |
1865 | |
1866 | eth_hw_addr_set(dev, addr: addr->sa_data); |
1867 | |
1868 | /* interface is disabled, changes to MAC will be reflected on next |
1869 | * open call |
1870 | */ |
1871 | if (!netif_running(dev)) |
1872 | return 0; |
1873 | |
1874 | umac_set_hw_addr(priv, addr: dev->dev_addr); |
1875 | |
1876 | return 0; |
1877 | } |
1878 | |
1879 | static void bcm_sysport_get_stats64(struct net_device *dev, |
1880 | struct rtnl_link_stats64 *stats) |
1881 | { |
1882 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
1883 | struct bcm_sysport_stats64 *stats64 = &priv->stats64; |
1884 | unsigned int start; |
1885 | |
1886 | netdev_stats_to_stats64(stats64: stats, netdev_stats: &dev->stats); |
1887 | |
1888 | bcm_sysport_update_tx_stats(priv, tx_bytes: &stats->tx_bytes, |
1889 | tx_packets: &stats->tx_packets); |
1890 | |
1891 | do { |
1892 | start = u64_stats_fetch_begin(syncp: &priv->syncp); |
1893 | stats->rx_packets = stats64->rx_packets; |
1894 | stats->rx_bytes = stats64->rx_bytes; |
1895 | } while (u64_stats_fetch_retry(syncp: &priv->syncp, start)); |
1896 | } |
1897 | |
1898 | static void bcm_sysport_netif_start(struct net_device *dev) |
1899 | { |
1900 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
1901 | |
1902 | /* Enable NAPI */ |
1903 | bcm_sysport_init_dim(priv, cb: bcm_sysport_dim_work); |
1904 | bcm_sysport_init_rx_coalesce(priv); |
1905 | napi_enable(n: &priv->napi); |
1906 | |
1907 | /* Enable RX interrupt and TX ring full interrupt */ |
1908 | intrl2_0_mask_clear(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL); |
1909 | |
1910 | phy_start(phydev: dev->phydev); |
1911 | |
1912 | /* Enable TX interrupts for the TXQs */ |
1913 | if (!priv->is_lite) |
1914 | intrl2_1_mask_clear(priv, mask: 0xffffffff); |
1915 | else |
1916 | intrl2_0_mask_clear(priv, INTRL2_0_TDMA_MBDONE_MASK); |
1917 | } |
1918 | |
1919 | static void rbuf_init(struct bcm_sysport_priv *priv) |
1920 | { |
1921 | u32 reg; |
1922 | |
1923 | reg = rbuf_readl(priv, RBUF_CONTROL); |
1924 | reg |= RBUF_4B_ALGN | RBUF_RSB_EN; |
1925 | /* Set a correct RSB format on SYSTEMPORT Lite */ |
1926 | if (priv->is_lite) |
1927 | reg &= ~RBUF_RSB_SWAP1; |
1928 | |
1929 | /* Set a correct RSB format based on host endian */ |
1930 | if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)) |
1931 | reg |= RBUF_RSB_SWAP0; |
1932 | else |
1933 | reg &= ~RBUF_RSB_SWAP0; |
1934 | rbuf_writel(priv, val: reg, RBUF_CONTROL); |
1935 | } |
1936 | |
1937 | static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv) |
1938 | { |
1939 | intrl2_0_mask_set(priv, mask: 0xffffffff); |
1940 | intrl2_0_writel(priv, val: 0xffffffff, INTRL2_CPU_CLEAR); |
1941 | if (!priv->is_lite) { |
1942 | intrl2_1_mask_set(priv, mask: 0xffffffff); |
1943 | intrl2_1_writel(priv, val: 0xffffffff, INTRL2_CPU_CLEAR); |
1944 | } |
1945 | } |
1946 | |
1947 | static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv) |
1948 | { |
1949 | u32 reg; |
1950 | |
1951 | reg = gib_readl(priv, GIB_CONTROL); |
1952 | /* Include Broadcom tag in pad extension and fix up IPG_LENGTH */ |
1953 | if (netdev_uses_dsa(dev: priv->netdev)) { |
1954 | reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT); |
1955 | reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT; |
1956 | } |
1957 | reg &= ~(GIB_IPG_LEN_MASK << GIB_IPG_LEN_SHIFT); |
1958 | reg |= 12 << GIB_IPG_LEN_SHIFT; |
1959 | gib_writel(priv, val: reg, GIB_CONTROL); |
1960 | } |
1961 | |
1962 | static int bcm_sysport_open(struct net_device *dev) |
1963 | { |
1964 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
1965 | struct phy_device *phydev; |
1966 | unsigned int i; |
1967 | int ret; |
1968 | |
1969 | clk_prepare_enable(clk: priv->clk); |
1970 | |
1971 | /* Reset UniMAC */ |
1972 | umac_reset(priv); |
1973 | |
1974 | /* Flush TX and RX FIFOs at TOPCTRL level */ |
1975 | topctrl_flush(priv); |
1976 | |
1977 | /* Disable the UniMAC RX/TX */ |
1978 | umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, enable: 0); |
1979 | |
1980 | /* Enable RBUF 2bytes alignment and Receive Status Block */ |
1981 | rbuf_init(priv); |
1982 | |
1983 | /* Set maximum frame length */ |
1984 | if (!priv->is_lite) |
1985 | umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN); |
1986 | else |
1987 | gib_set_pad_extension(priv); |
1988 | |
1989 | /* Apply features again in case we changed them while interface was |
1990 | * down |
1991 | */ |
1992 | bcm_sysport_set_features(dev, features: dev->features); |
1993 | |
1994 | /* Set MAC address */ |
1995 | umac_set_hw_addr(priv, addr: dev->dev_addr); |
1996 | |
1997 | phydev = of_phy_connect(dev, phy_np: priv->phy_dn, hndlr: bcm_sysport_adj_link, |
1998 | flags: 0, iface: priv->phy_interface); |
1999 | if (!phydev) { |
2000 | netdev_err(dev, format: "could not attach to PHY\n" ); |
2001 | ret = -ENODEV; |
2002 | goto out_clk_disable; |
2003 | } |
2004 | |
2005 | /* Indicate that the MAC is responsible for PHY PM */ |
2006 | phydev->mac_managed_pm = true; |
2007 | |
2008 | /* Reset house keeping link status */ |
2009 | priv->old_duplex = -1; |
2010 | priv->old_link = -1; |
2011 | priv->old_pause = -1; |
2012 | |
2013 | /* mask all interrupts and request them */ |
2014 | bcm_sysport_mask_all_intrs(priv); |
2015 | |
2016 | ret = request_irq(irq: priv->irq0, handler: bcm_sysport_rx_isr, flags: 0, name: dev->name, dev); |
2017 | if (ret) { |
2018 | netdev_err(dev, format: "failed to request RX interrupt\n" ); |
2019 | goto out_phy_disconnect; |
2020 | } |
2021 | |
2022 | if (!priv->is_lite) { |
2023 | ret = request_irq(irq: priv->irq1, handler: bcm_sysport_tx_isr, flags: 0, |
2024 | name: dev->name, dev); |
2025 | if (ret) { |
2026 | netdev_err(dev, format: "failed to request TX interrupt\n" ); |
2027 | goto out_free_irq0; |
2028 | } |
2029 | } |
2030 | |
2031 | /* Initialize both hardware and software ring */ |
2032 | spin_lock_init(&priv->desc_lock); |
2033 | for (i = 0; i < dev->num_tx_queues; i++) { |
2034 | ret = bcm_sysport_init_tx_ring(priv, index: i); |
2035 | if (ret) { |
2036 | netdev_err(dev, format: "failed to initialize TX ring %d\n" , |
2037 | i); |
2038 | goto out_free_tx_ring; |
2039 | } |
2040 | } |
2041 | |
2042 | /* Initialize linked-list */ |
2043 | tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS); |
2044 | |
2045 | /* Initialize RX ring */ |
2046 | ret = bcm_sysport_init_rx_ring(priv); |
2047 | if (ret) { |
2048 | netdev_err(dev, format: "failed to initialize RX ring\n" ); |
2049 | goto out_free_rx_ring; |
2050 | } |
2051 | |
2052 | /* Turn on RDMA */ |
2053 | ret = rdma_enable_set(priv, enable: 1); |
2054 | if (ret) |
2055 | goto out_free_rx_ring; |
2056 | |
2057 | /* Turn on TDMA */ |
2058 | ret = tdma_enable_set(priv, enable: 1); |
2059 | if (ret) |
2060 | goto out_clear_rx_int; |
2061 | |
2062 | /* Turn on UniMAC TX/RX */ |
2063 | umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, enable: 1); |
2064 | |
2065 | bcm_sysport_netif_start(dev); |
2066 | |
2067 | netif_tx_start_all_queues(dev); |
2068 | |
2069 | return 0; |
2070 | |
2071 | out_clear_rx_int: |
2072 | intrl2_0_mask_set(priv, INTRL2_0_RDMA_MBDONE | INTRL2_0_TX_RING_FULL); |
2073 | out_free_rx_ring: |
2074 | bcm_sysport_fini_rx_ring(priv); |
2075 | out_free_tx_ring: |
2076 | for (i = 0; i < dev->num_tx_queues; i++) |
2077 | bcm_sysport_fini_tx_ring(priv, index: i); |
2078 | if (!priv->is_lite) |
2079 | free_irq(priv->irq1, dev); |
2080 | out_free_irq0: |
2081 | free_irq(priv->irq0, dev); |
2082 | out_phy_disconnect: |
2083 | phy_disconnect(phydev); |
2084 | out_clk_disable: |
2085 | clk_disable_unprepare(clk: priv->clk); |
2086 | return ret; |
2087 | } |
2088 | |
2089 | static void bcm_sysport_netif_stop(struct net_device *dev) |
2090 | { |
2091 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
2092 | |
2093 | /* stop all software from updating hardware */ |
2094 | netif_tx_disable(dev); |
2095 | napi_disable(n: &priv->napi); |
2096 | cancel_work_sync(work: &priv->dim.dim.work); |
2097 | phy_stop(phydev: dev->phydev); |
2098 | |
2099 | /* mask all interrupts */ |
2100 | bcm_sysport_mask_all_intrs(priv); |
2101 | } |
2102 | |
2103 | static int bcm_sysport_stop(struct net_device *dev) |
2104 | { |
2105 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
2106 | unsigned int i; |
2107 | int ret; |
2108 | |
2109 | bcm_sysport_netif_stop(dev); |
2110 | |
2111 | /* Disable UniMAC RX */ |
2112 | umac_enable_set(priv, CMD_RX_EN, enable: 0); |
2113 | |
2114 | ret = tdma_enable_set(priv, enable: 0); |
2115 | if (ret) { |
2116 | netdev_err(dev, format: "timeout disabling RDMA\n" ); |
2117 | return ret; |
2118 | } |
2119 | |
2120 | /* Wait for a maximum packet size to be drained */ |
2121 | usleep_range(min: 2000, max: 3000); |
2122 | |
2123 | ret = rdma_enable_set(priv, enable: 0); |
2124 | if (ret) { |
2125 | netdev_err(dev, format: "timeout disabling TDMA\n" ); |
2126 | return ret; |
2127 | } |
2128 | |
2129 | /* Disable UniMAC TX */ |
2130 | umac_enable_set(priv, CMD_TX_EN, enable: 0); |
2131 | |
2132 | /* Free RX/TX rings SW structures */ |
2133 | for (i = 0; i < dev->num_tx_queues; i++) |
2134 | bcm_sysport_fini_tx_ring(priv, index: i); |
2135 | bcm_sysport_fini_rx_ring(priv); |
2136 | |
2137 | free_irq(priv->irq0, dev); |
2138 | if (!priv->is_lite) |
2139 | free_irq(priv->irq1, dev); |
2140 | |
2141 | /* Disconnect from PHY */ |
2142 | phy_disconnect(phydev: dev->phydev); |
2143 | |
2144 | clk_disable_unprepare(clk: priv->clk); |
2145 | |
2146 | return 0; |
2147 | } |
2148 | |
2149 | static int bcm_sysport_rule_find(struct bcm_sysport_priv *priv, |
2150 | u64 location) |
2151 | { |
2152 | unsigned int index; |
2153 | u32 reg; |
2154 | |
2155 | for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) { |
2156 | reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index)); |
2157 | reg >>= RXCHK_BRCM_TAG_CID_SHIFT; |
2158 | reg &= RXCHK_BRCM_TAG_CID_MASK; |
2159 | if (reg == location) |
2160 | return index; |
2161 | } |
2162 | |
2163 | return -EINVAL; |
2164 | } |
2165 | |
2166 | static int bcm_sysport_rule_get(struct bcm_sysport_priv *priv, |
2167 | struct ethtool_rxnfc *nfc) |
2168 | { |
2169 | int index; |
2170 | |
2171 | /* This is not a rule that we know about */ |
2172 | index = bcm_sysport_rule_find(priv, location: nfc->fs.location); |
2173 | if (index < 0) |
2174 | return -EOPNOTSUPP; |
2175 | |
2176 | nfc->fs.ring_cookie = RX_CLS_FLOW_WAKE; |
2177 | |
2178 | return 0; |
2179 | } |
2180 | |
2181 | static int bcm_sysport_rule_set(struct bcm_sysport_priv *priv, |
2182 | struct ethtool_rxnfc *nfc) |
2183 | { |
2184 | unsigned int index; |
2185 | u32 reg; |
2186 | |
2187 | /* We cannot match locations greater than what the classification ID |
2188 | * permits (256 entries) |
2189 | */ |
2190 | if (nfc->fs.location > RXCHK_BRCM_TAG_CID_MASK) |
2191 | return -E2BIG; |
2192 | |
2193 | /* We cannot support flows that are not destined for a wake-up */ |
2194 | if (nfc->fs.ring_cookie != RX_CLS_FLOW_WAKE) |
2195 | return -EOPNOTSUPP; |
2196 | |
2197 | index = find_first_zero_bit(addr: priv->filters, RXCHK_BRCM_TAG_MAX); |
2198 | if (index >= RXCHK_BRCM_TAG_MAX) |
2199 | /* All filters are already in use, we cannot match more rules */ |
2200 | return -ENOSPC; |
2201 | |
2202 | /* Location is the classification ID, and index is the position |
2203 | * within one of our 8 possible filters to be programmed |
2204 | */ |
2205 | reg = rxchk_readl(priv, RXCHK_BRCM_TAG(index)); |
2206 | reg &= ~(RXCHK_BRCM_TAG_CID_MASK << RXCHK_BRCM_TAG_CID_SHIFT); |
2207 | reg |= nfc->fs.location << RXCHK_BRCM_TAG_CID_SHIFT; |
2208 | rxchk_writel(priv, val: reg, RXCHK_BRCM_TAG(index)); |
2209 | rxchk_writel(priv, val: 0xff00ffff, RXCHK_BRCM_TAG_MASK(index)); |
2210 | |
2211 | priv->filters_loc[index] = nfc->fs.location; |
2212 | set_bit(nr: index, addr: priv->filters); |
2213 | |
2214 | return 0; |
2215 | } |
2216 | |
2217 | static int bcm_sysport_rule_del(struct bcm_sysport_priv *priv, |
2218 | u64 location) |
2219 | { |
2220 | int index; |
2221 | |
2222 | /* This is not a rule that we know about */ |
2223 | index = bcm_sysport_rule_find(priv, location); |
2224 | if (index < 0) |
2225 | return -EOPNOTSUPP; |
2226 | |
2227 | /* No need to disable this filter if it was enabled, this will |
2228 | * be taken care of during suspend time by bcm_sysport_suspend_to_wol |
2229 | */ |
2230 | clear_bit(nr: index, addr: priv->filters); |
2231 | priv->filters_loc[index] = 0; |
2232 | |
2233 | return 0; |
2234 | } |
2235 | |
2236 | static int bcm_sysport_get_rxnfc(struct net_device *dev, |
2237 | struct ethtool_rxnfc *nfc, u32 *rule_locs) |
2238 | { |
2239 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
2240 | int ret = -EOPNOTSUPP; |
2241 | |
2242 | switch (nfc->cmd) { |
2243 | case ETHTOOL_GRXCLSRULE: |
2244 | ret = bcm_sysport_rule_get(priv, nfc); |
2245 | break; |
2246 | default: |
2247 | break; |
2248 | } |
2249 | |
2250 | return ret; |
2251 | } |
2252 | |
2253 | static int bcm_sysport_set_rxnfc(struct net_device *dev, |
2254 | struct ethtool_rxnfc *nfc) |
2255 | { |
2256 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
2257 | int ret = -EOPNOTSUPP; |
2258 | |
2259 | switch (nfc->cmd) { |
2260 | case ETHTOOL_SRXCLSRLINS: |
2261 | ret = bcm_sysport_rule_set(priv, nfc); |
2262 | break; |
2263 | case ETHTOOL_SRXCLSRLDEL: |
2264 | ret = bcm_sysport_rule_del(priv, location: nfc->fs.location); |
2265 | break; |
2266 | default: |
2267 | break; |
2268 | } |
2269 | |
2270 | return ret; |
2271 | } |
2272 | |
2273 | static const struct ethtool_ops bcm_sysport_ethtool_ops = { |
2274 | .supported_coalesce_params = ETHTOOL_COALESCE_USECS | |
2275 | ETHTOOL_COALESCE_MAX_FRAMES | |
2276 | ETHTOOL_COALESCE_USE_ADAPTIVE_RX, |
2277 | .get_drvinfo = bcm_sysport_get_drvinfo, |
2278 | .get_msglevel = bcm_sysport_get_msglvl, |
2279 | .set_msglevel = bcm_sysport_set_msglvl, |
2280 | .get_link = ethtool_op_get_link, |
2281 | .get_strings = bcm_sysport_get_strings, |
2282 | .get_ethtool_stats = bcm_sysport_get_stats, |
2283 | .get_sset_count = bcm_sysport_get_sset_count, |
2284 | .get_wol = bcm_sysport_get_wol, |
2285 | .set_wol = bcm_sysport_set_wol, |
2286 | .get_coalesce = bcm_sysport_get_coalesce, |
2287 | .set_coalesce = bcm_sysport_set_coalesce, |
2288 | .get_link_ksettings = phy_ethtool_get_link_ksettings, |
2289 | .set_link_ksettings = phy_ethtool_set_link_ksettings, |
2290 | .get_rxnfc = bcm_sysport_get_rxnfc, |
2291 | .set_rxnfc = bcm_sysport_set_rxnfc, |
2292 | }; |
2293 | |
2294 | static u16 bcm_sysport_select_queue(struct net_device *dev, struct sk_buff *skb, |
2295 | struct net_device *sb_dev) |
2296 | { |
2297 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
2298 | u16 queue = skb_get_queue_mapping(skb); |
2299 | struct bcm_sysport_tx_ring *tx_ring; |
2300 | unsigned int q, port; |
2301 | |
2302 | if (!netdev_uses_dsa(dev)) |
2303 | return netdev_pick_tx(dev, skb, NULL); |
2304 | |
2305 | /* DSA tagging layer will have configured the correct queue */ |
2306 | q = BRCM_TAG_GET_QUEUE(queue); |
2307 | port = BRCM_TAG_GET_PORT(queue); |
2308 | tx_ring = priv->ring_map[q + port * priv->per_port_num_tx_queues]; |
2309 | |
2310 | if (unlikely(!tx_ring)) |
2311 | return netdev_pick_tx(dev, skb, NULL); |
2312 | |
2313 | return tx_ring->index; |
2314 | } |
2315 | |
2316 | static const struct net_device_ops bcm_sysport_netdev_ops = { |
2317 | .ndo_start_xmit = bcm_sysport_xmit, |
2318 | .ndo_tx_timeout = bcm_sysport_tx_timeout, |
2319 | .ndo_open = bcm_sysport_open, |
2320 | .ndo_stop = bcm_sysport_stop, |
2321 | .ndo_set_features = bcm_sysport_set_features, |
2322 | .ndo_set_rx_mode = bcm_sysport_set_rx_mode, |
2323 | .ndo_set_mac_address = bcm_sysport_change_mac, |
2324 | #ifdef CONFIG_NET_POLL_CONTROLLER |
2325 | .ndo_poll_controller = bcm_sysport_poll_controller, |
2326 | #endif |
2327 | .ndo_get_stats64 = bcm_sysport_get_stats64, |
2328 | .ndo_select_queue = bcm_sysport_select_queue, |
2329 | }; |
2330 | |
2331 | static int bcm_sysport_map_queues(struct net_device *dev, |
2332 | struct net_device *slave_dev) |
2333 | { |
2334 | struct dsa_port *dp = dsa_port_from_netdev(netdev: slave_dev); |
2335 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
2336 | struct bcm_sysport_tx_ring *ring; |
2337 | unsigned int num_tx_queues; |
2338 | unsigned int q, qp, port; |
2339 | |
2340 | /* We can't be setting up queue inspection for non directly attached |
2341 | * switches |
2342 | */ |
2343 | if (dp->ds->index) |
2344 | return 0; |
2345 | |
2346 | port = dp->index; |
2347 | |
2348 | /* On SYSTEMPORT Lite we have twice as less queues, so we cannot do a |
2349 | * 1:1 mapping, we can only do a 2:1 mapping. By reducing the number of |
2350 | * per-port (slave_dev) network devices queue, we achieve just that. |
2351 | * This need to happen now before any slave network device is used such |
2352 | * it accurately reflects the number of real TX queues. |
2353 | */ |
2354 | if (priv->is_lite) |
2355 | netif_set_real_num_tx_queues(dev: slave_dev, |
2356 | txq: slave_dev->num_tx_queues / 2); |
2357 | |
2358 | num_tx_queues = slave_dev->real_num_tx_queues; |
2359 | |
2360 | if (priv->per_port_num_tx_queues && |
2361 | priv->per_port_num_tx_queues != num_tx_queues) |
2362 | netdev_warn(dev: slave_dev, format: "asymmetric number of per-port queues\n" ); |
2363 | |
2364 | priv->per_port_num_tx_queues = num_tx_queues; |
2365 | |
2366 | for (q = 0, qp = 0; q < dev->num_tx_queues && qp < num_tx_queues; |
2367 | q++) { |
2368 | ring = &priv->tx_rings[q]; |
2369 | |
2370 | if (ring->inspect) |
2371 | continue; |
2372 | |
2373 | /* Just remember the mapping actual programming done |
2374 | * during bcm_sysport_init_tx_ring |
2375 | */ |
2376 | ring->switch_queue = qp; |
2377 | ring->switch_port = port; |
2378 | ring->inspect = true; |
2379 | priv->ring_map[qp + port * num_tx_queues] = ring; |
2380 | qp++; |
2381 | } |
2382 | |
2383 | return 0; |
2384 | } |
2385 | |
2386 | static int bcm_sysport_unmap_queues(struct net_device *dev, |
2387 | struct net_device *slave_dev) |
2388 | { |
2389 | struct dsa_port *dp = dsa_port_from_netdev(netdev: slave_dev); |
2390 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
2391 | struct bcm_sysport_tx_ring *ring; |
2392 | unsigned int num_tx_queues; |
2393 | unsigned int q, qp, port; |
2394 | |
2395 | port = dp->index; |
2396 | |
2397 | num_tx_queues = slave_dev->real_num_tx_queues; |
2398 | |
2399 | for (q = 0; q < dev->num_tx_queues; q++) { |
2400 | ring = &priv->tx_rings[q]; |
2401 | |
2402 | if (ring->switch_port != port) |
2403 | continue; |
2404 | |
2405 | if (!ring->inspect) |
2406 | continue; |
2407 | |
2408 | ring->inspect = false; |
2409 | qp = ring->switch_queue; |
2410 | priv->ring_map[qp + port * num_tx_queues] = NULL; |
2411 | } |
2412 | |
2413 | return 0; |
2414 | } |
2415 | |
2416 | static int bcm_sysport_netdevice_event(struct notifier_block *nb, |
2417 | unsigned long event, void *ptr) |
2418 | { |
2419 | struct net_device *dev = netdev_notifier_info_to_dev(info: ptr); |
2420 | struct netdev_notifier_changeupper_info *info = ptr; |
2421 | struct bcm_sysport_priv *priv; |
2422 | int ret = 0; |
2423 | |
2424 | priv = container_of(nb, struct bcm_sysport_priv, netdev_notifier); |
2425 | if (priv->netdev != dev) |
2426 | return NOTIFY_DONE; |
2427 | |
2428 | switch (event) { |
2429 | case NETDEV_CHANGEUPPER: |
2430 | if (dev->netdev_ops != &bcm_sysport_netdev_ops) |
2431 | return NOTIFY_DONE; |
2432 | |
2433 | if (!dsa_user_dev_check(dev: info->upper_dev)) |
2434 | return NOTIFY_DONE; |
2435 | |
2436 | if (info->linking) |
2437 | ret = bcm_sysport_map_queues(dev, slave_dev: info->upper_dev); |
2438 | else |
2439 | ret = bcm_sysport_unmap_queues(dev, slave_dev: info->upper_dev); |
2440 | break; |
2441 | } |
2442 | |
2443 | return notifier_from_errno(err: ret); |
2444 | } |
2445 | |
2446 | #define REV_FMT "v%2x.%02x" |
2447 | |
2448 | static const struct bcm_sysport_hw_params bcm_sysport_params[] = { |
2449 | [SYSTEMPORT] = { |
2450 | .is_lite = false, |
2451 | .num_rx_desc_words = SP_NUM_HW_RX_DESC_WORDS, |
2452 | }, |
2453 | [SYSTEMPORT_LITE] = { |
2454 | .is_lite = true, |
2455 | .num_rx_desc_words = SP_LT_NUM_HW_RX_DESC_WORDS, |
2456 | }, |
2457 | }; |
2458 | |
2459 | static const struct of_device_id bcm_sysport_of_match[] = { |
2460 | { .compatible = "brcm,systemportlite-v1.00" , |
2461 | .data = &bcm_sysport_params[SYSTEMPORT_LITE] }, |
2462 | { .compatible = "brcm,systemport-v1.00" , |
2463 | .data = &bcm_sysport_params[SYSTEMPORT] }, |
2464 | { .compatible = "brcm,systemport" , |
2465 | .data = &bcm_sysport_params[SYSTEMPORT] }, |
2466 | { /* sentinel */ } |
2467 | }; |
2468 | MODULE_DEVICE_TABLE(of, bcm_sysport_of_match); |
2469 | |
2470 | static int bcm_sysport_probe(struct platform_device *pdev) |
2471 | { |
2472 | const struct bcm_sysport_hw_params *params; |
2473 | const struct of_device_id *of_id = NULL; |
2474 | struct bcm_sysport_priv *priv; |
2475 | struct device_node *dn; |
2476 | struct net_device *dev; |
2477 | u32 txq, rxq; |
2478 | int ret; |
2479 | |
2480 | dn = pdev->dev.of_node; |
2481 | of_id = of_match_node(matches: bcm_sysport_of_match, node: dn); |
2482 | if (!of_id || !of_id->data) |
2483 | return -EINVAL; |
2484 | |
2485 | ret = dma_set_mask_and_coherent(dev: &pdev->dev, DMA_BIT_MASK(40)); |
2486 | if (ret) |
2487 | ret = dma_set_mask_and_coherent(dev: &pdev->dev, DMA_BIT_MASK(32)); |
2488 | if (ret) { |
2489 | dev_err(&pdev->dev, "unable to set DMA mask: %d\n" , ret); |
2490 | return ret; |
2491 | } |
2492 | |
2493 | /* Fairly quickly we need to know the type of adapter we have */ |
2494 | params = of_id->data; |
2495 | |
2496 | /* Read the Transmit/Receive Queue properties */ |
2497 | if (of_property_read_u32(np: dn, propname: "systemport,num-txq" , out_value: &txq)) |
2498 | txq = TDMA_NUM_RINGS; |
2499 | if (of_property_read_u32(np: dn, propname: "systemport,num-rxq" , out_value: &rxq)) |
2500 | rxq = 1; |
2501 | |
2502 | /* Sanity check the number of transmit queues */ |
2503 | if (!txq || txq > TDMA_NUM_RINGS) |
2504 | return -EINVAL; |
2505 | |
2506 | dev = alloc_etherdev_mqs(sizeof_priv: sizeof(*priv), txqs: txq, rxqs: rxq); |
2507 | if (!dev) |
2508 | return -ENOMEM; |
2509 | |
2510 | /* Initialize private members */ |
2511 | priv = netdev_priv(dev); |
2512 | |
2513 | priv->clk = devm_clk_get_optional(dev: &pdev->dev, id: "sw_sysport" ); |
2514 | if (IS_ERR(ptr: priv->clk)) { |
2515 | ret = PTR_ERR(ptr: priv->clk); |
2516 | goto err_free_netdev; |
2517 | } |
2518 | |
2519 | /* Allocate number of TX rings */ |
2520 | priv->tx_rings = devm_kcalloc(dev: &pdev->dev, n: txq, |
2521 | size: sizeof(struct bcm_sysport_tx_ring), |
2522 | GFP_KERNEL); |
2523 | if (!priv->tx_rings) { |
2524 | ret = -ENOMEM; |
2525 | goto err_free_netdev; |
2526 | } |
2527 | |
2528 | priv->is_lite = params->is_lite; |
2529 | priv->num_rx_desc_words = params->num_rx_desc_words; |
2530 | |
2531 | priv->irq0 = platform_get_irq(pdev, 0); |
2532 | if (!priv->is_lite) { |
2533 | priv->irq1 = platform_get_irq(pdev, 1); |
2534 | priv->wol_irq = platform_get_irq_optional(pdev, 2); |
2535 | } else { |
2536 | priv->wol_irq = platform_get_irq_optional(pdev, 1); |
2537 | } |
2538 | if (priv->irq0 <= 0 || (priv->irq1 <= 0 && !priv->is_lite)) { |
2539 | ret = -EINVAL; |
2540 | goto err_free_netdev; |
2541 | } |
2542 | |
2543 | priv->base = devm_platform_ioremap_resource(pdev, index: 0); |
2544 | if (IS_ERR(ptr: priv->base)) { |
2545 | ret = PTR_ERR(ptr: priv->base); |
2546 | goto err_free_netdev; |
2547 | } |
2548 | |
2549 | priv->netdev = dev; |
2550 | priv->pdev = pdev; |
2551 | |
2552 | ret = of_get_phy_mode(np: dn, interface: &priv->phy_interface); |
2553 | /* Default to GMII interface mode */ |
2554 | if (ret) |
2555 | priv->phy_interface = PHY_INTERFACE_MODE_GMII; |
2556 | |
2557 | /* In the case of a fixed PHY, the DT node associated |
2558 | * to the PHY is the Ethernet MAC DT node. |
2559 | */ |
2560 | if (of_phy_is_fixed_link(np: dn)) { |
2561 | ret = of_phy_register_fixed_link(np: dn); |
2562 | if (ret) { |
2563 | dev_err(&pdev->dev, "failed to register fixed PHY\n" ); |
2564 | goto err_free_netdev; |
2565 | } |
2566 | |
2567 | priv->phy_dn = dn; |
2568 | } |
2569 | |
2570 | /* Initialize netdevice members */ |
2571 | ret = of_get_ethdev_address(np: dn, dev); |
2572 | if (ret) { |
2573 | dev_warn(&pdev->dev, "using random Ethernet MAC\n" ); |
2574 | eth_hw_addr_random(dev); |
2575 | } |
2576 | |
2577 | SET_NETDEV_DEV(dev, &pdev->dev); |
2578 | dev_set_drvdata(dev: &pdev->dev, data: dev); |
2579 | dev->ethtool_ops = &bcm_sysport_ethtool_ops; |
2580 | dev->netdev_ops = &bcm_sysport_netdev_ops; |
2581 | netif_napi_add(dev, napi: &priv->napi, poll: bcm_sysport_poll); |
2582 | |
2583 | dev->features |= NETIF_F_RXCSUM | NETIF_F_HIGHDMA | |
2584 | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | |
2585 | NETIF_F_HW_VLAN_CTAG_TX; |
2586 | dev->hw_features |= dev->features; |
2587 | dev->vlan_features |= dev->features; |
2588 | dev->max_mtu = UMAC_MAX_MTU_SIZE; |
2589 | |
2590 | /* Request the WOL interrupt and advertise suspend if available */ |
2591 | priv->wol_irq_disabled = 1; |
2592 | ret = devm_request_irq(dev: &pdev->dev, irq: priv->wol_irq, |
2593 | handler: bcm_sysport_wol_isr, irqflags: 0, devname: dev->name, dev_id: priv); |
2594 | if (!ret) |
2595 | device_set_wakeup_capable(dev: &pdev->dev, capable: 1); |
2596 | |
2597 | priv->wol_clk = devm_clk_get_optional(dev: &pdev->dev, id: "sw_sysportwol" ); |
2598 | if (IS_ERR(ptr: priv->wol_clk)) { |
2599 | ret = PTR_ERR(ptr: priv->wol_clk); |
2600 | goto err_deregister_fixed_link; |
2601 | } |
2602 | |
2603 | /* Set the needed headroom once and for all */ |
2604 | BUILD_BUG_ON(sizeof(struct bcm_tsb) != 8); |
2605 | dev->needed_headroom += sizeof(struct bcm_tsb); |
2606 | |
2607 | /* libphy will adjust the link state accordingly */ |
2608 | netif_carrier_off(dev); |
2609 | |
2610 | priv->rx_max_coalesced_frames = 1; |
2611 | u64_stats_init(syncp: &priv->syncp); |
2612 | |
2613 | priv->netdev_notifier.notifier_call = bcm_sysport_netdevice_event; |
2614 | |
2615 | ret = register_netdevice_notifier(nb: &priv->netdev_notifier); |
2616 | if (ret) { |
2617 | dev_err(&pdev->dev, "failed to register DSA notifier\n" ); |
2618 | goto err_deregister_fixed_link; |
2619 | } |
2620 | |
2621 | ret = register_netdev(dev); |
2622 | if (ret) { |
2623 | dev_err(&pdev->dev, "failed to register net_device\n" ); |
2624 | goto err_deregister_notifier; |
2625 | } |
2626 | |
2627 | clk_prepare_enable(clk: priv->clk); |
2628 | |
2629 | priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK; |
2630 | dev_info(&pdev->dev, |
2631 | "Broadcom SYSTEMPORT%s " REV_FMT |
2632 | " (irqs: %d, %d, TXQs: %d, RXQs: %d)\n" , |
2633 | priv->is_lite ? " Lite" : "" , |
2634 | (priv->rev >> 8) & 0xff, priv->rev & 0xff, |
2635 | priv->irq0, priv->irq1, txq, rxq); |
2636 | |
2637 | clk_disable_unprepare(clk: priv->clk); |
2638 | |
2639 | return 0; |
2640 | |
2641 | err_deregister_notifier: |
2642 | unregister_netdevice_notifier(nb: &priv->netdev_notifier); |
2643 | err_deregister_fixed_link: |
2644 | if (of_phy_is_fixed_link(np: dn)) |
2645 | of_phy_deregister_fixed_link(np: dn); |
2646 | err_free_netdev: |
2647 | free_netdev(dev); |
2648 | return ret; |
2649 | } |
2650 | |
2651 | static void bcm_sysport_remove(struct platform_device *pdev) |
2652 | { |
2653 | struct net_device *dev = dev_get_drvdata(dev: &pdev->dev); |
2654 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
2655 | struct device_node *dn = pdev->dev.of_node; |
2656 | |
2657 | /* Not much to do, ndo_close has been called |
2658 | * and we use managed allocations |
2659 | */ |
2660 | unregister_netdevice_notifier(nb: &priv->netdev_notifier); |
2661 | unregister_netdev(dev); |
2662 | if (of_phy_is_fixed_link(np: dn)) |
2663 | of_phy_deregister_fixed_link(np: dn); |
2664 | free_netdev(dev); |
2665 | dev_set_drvdata(dev: &pdev->dev, NULL); |
2666 | } |
2667 | |
2668 | static int bcm_sysport_suspend_to_wol(struct bcm_sysport_priv *priv) |
2669 | { |
2670 | struct net_device *ndev = priv->netdev; |
2671 | unsigned int timeout = 1000; |
2672 | unsigned int index, i = 0; |
2673 | u32 reg; |
2674 | |
2675 | reg = umac_readl(priv, UMAC_MPD_CTRL); |
2676 | if (priv->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE)) |
2677 | reg |= MPD_EN; |
2678 | reg &= ~PSW_EN; |
2679 | if (priv->wolopts & WAKE_MAGICSECURE) { |
2680 | /* Program the SecureOn password */ |
2681 | umac_writel(priv, val: get_unaligned_be16(p: &priv->sopass[0]), |
2682 | UMAC_PSW_MS); |
2683 | umac_writel(priv, val: get_unaligned_be32(p: &priv->sopass[2]), |
2684 | UMAC_PSW_LS); |
2685 | reg |= PSW_EN; |
2686 | } |
2687 | umac_writel(priv, val: reg, UMAC_MPD_CTRL); |
2688 | |
2689 | if (priv->wolopts & WAKE_FILTER) { |
2690 | /* Turn on ACPI matching to steal packets from RBUF */ |
2691 | reg = rbuf_readl(priv, RBUF_CONTROL); |
2692 | if (priv->is_lite) |
2693 | reg |= RBUF_ACPI_EN_LITE; |
2694 | else |
2695 | reg |= RBUF_ACPI_EN; |
2696 | rbuf_writel(priv, val: reg, RBUF_CONTROL); |
2697 | |
2698 | /* Enable RXCHK, active filters and Broadcom tag matching */ |
2699 | reg = rxchk_readl(priv, RXCHK_CONTROL); |
2700 | reg &= ~(RXCHK_BRCM_TAG_MATCH_MASK << |
2701 | RXCHK_BRCM_TAG_MATCH_SHIFT); |
2702 | for_each_set_bit(index, priv->filters, RXCHK_BRCM_TAG_MAX) { |
2703 | reg |= BIT(RXCHK_BRCM_TAG_MATCH_SHIFT + i); |
2704 | i++; |
2705 | } |
2706 | reg |= RXCHK_EN | RXCHK_BRCM_TAG_EN; |
2707 | rxchk_writel(priv, val: reg, RXCHK_CONTROL); |
2708 | } |
2709 | |
2710 | /* Make sure RBUF entered WoL mode as result */ |
2711 | do { |
2712 | reg = rbuf_readl(priv, RBUF_STATUS); |
2713 | if (reg & RBUF_WOL_MODE) |
2714 | break; |
2715 | |
2716 | udelay(10); |
2717 | } while (timeout-- > 0); |
2718 | |
2719 | /* Do not leave the UniMAC RBUF matching only MPD packets */ |
2720 | if (!timeout) { |
2721 | mpd_enable_set(priv, enable: false); |
2722 | netif_err(priv, wol, ndev, "failed to enter WOL mode\n" ); |
2723 | return -ETIMEDOUT; |
2724 | } |
2725 | |
2726 | /* UniMAC receive needs to be turned on */ |
2727 | umac_enable_set(priv, CMD_RX_EN, enable: 1); |
2728 | |
2729 | netif_dbg(priv, wol, ndev, "entered WOL mode\n" ); |
2730 | |
2731 | return 0; |
2732 | } |
2733 | |
2734 | static int __maybe_unused bcm_sysport_suspend(struct device *d) |
2735 | { |
2736 | struct net_device *dev = dev_get_drvdata(dev: d); |
2737 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
2738 | unsigned int i; |
2739 | int ret = 0; |
2740 | u32 reg; |
2741 | |
2742 | if (!netif_running(dev)) |
2743 | return 0; |
2744 | |
2745 | netif_device_detach(dev); |
2746 | |
2747 | bcm_sysport_netif_stop(dev); |
2748 | |
2749 | phy_suspend(phydev: dev->phydev); |
2750 | |
2751 | /* Disable UniMAC RX */ |
2752 | umac_enable_set(priv, CMD_RX_EN, enable: 0); |
2753 | |
2754 | ret = rdma_enable_set(priv, enable: 0); |
2755 | if (ret) { |
2756 | netdev_err(dev, format: "RDMA timeout!\n" ); |
2757 | return ret; |
2758 | } |
2759 | |
2760 | /* Disable RXCHK if enabled */ |
2761 | if (priv->rx_chk_en) { |
2762 | reg = rxchk_readl(priv, RXCHK_CONTROL); |
2763 | reg &= ~RXCHK_EN; |
2764 | rxchk_writel(priv, val: reg, RXCHK_CONTROL); |
2765 | } |
2766 | |
2767 | /* Flush RX pipe */ |
2768 | if (!priv->wolopts) |
2769 | topctrl_writel(priv, RX_FLUSH, RX_FLUSH_CNTL); |
2770 | |
2771 | ret = tdma_enable_set(priv, enable: 0); |
2772 | if (ret) { |
2773 | netdev_err(dev, format: "TDMA timeout!\n" ); |
2774 | return ret; |
2775 | } |
2776 | |
2777 | /* Wait for a packet boundary */ |
2778 | usleep_range(min: 2000, max: 3000); |
2779 | |
2780 | umac_enable_set(priv, CMD_TX_EN, enable: 0); |
2781 | |
2782 | topctrl_writel(priv, TX_FLUSH, TX_FLUSH_CNTL); |
2783 | |
2784 | /* Free RX/TX rings SW structures */ |
2785 | for (i = 0; i < dev->num_tx_queues; i++) |
2786 | bcm_sysport_fini_tx_ring(priv, index: i); |
2787 | bcm_sysport_fini_rx_ring(priv); |
2788 | |
2789 | /* Get prepared for Wake-on-LAN */ |
2790 | if (device_may_wakeup(dev: d) && priv->wolopts) { |
2791 | clk_prepare_enable(clk: priv->wol_clk); |
2792 | ret = bcm_sysport_suspend_to_wol(priv); |
2793 | } |
2794 | |
2795 | clk_disable_unprepare(clk: priv->clk); |
2796 | |
2797 | return ret; |
2798 | } |
2799 | |
2800 | static int __maybe_unused bcm_sysport_resume(struct device *d) |
2801 | { |
2802 | struct net_device *dev = dev_get_drvdata(dev: d); |
2803 | struct bcm_sysport_priv *priv = netdev_priv(dev); |
2804 | unsigned int i; |
2805 | int ret; |
2806 | |
2807 | if (!netif_running(dev)) |
2808 | return 0; |
2809 | |
2810 | clk_prepare_enable(clk: priv->clk); |
2811 | if (priv->wolopts) |
2812 | clk_disable_unprepare(clk: priv->wol_clk); |
2813 | |
2814 | umac_reset(priv); |
2815 | |
2816 | /* Disable the UniMAC RX/TX */ |
2817 | umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, enable: 0); |
2818 | |
2819 | /* We may have been suspended and never received a WOL event that |
2820 | * would turn off MPD detection, take care of that now |
2821 | */ |
2822 | bcm_sysport_resume_from_wol(priv); |
2823 | |
2824 | /* Initialize both hardware and software ring */ |
2825 | for (i = 0; i < dev->num_tx_queues; i++) { |
2826 | ret = bcm_sysport_init_tx_ring(priv, index: i); |
2827 | if (ret) { |
2828 | netdev_err(dev, format: "failed to initialize TX ring %d\n" , |
2829 | i); |
2830 | goto out_free_tx_rings; |
2831 | } |
2832 | } |
2833 | |
2834 | /* Initialize linked-list */ |
2835 | tdma_writel(priv, TDMA_LL_RAM_INIT_BUSY, TDMA_STATUS); |
2836 | |
2837 | /* Initialize RX ring */ |
2838 | ret = bcm_sysport_init_rx_ring(priv); |
2839 | if (ret) { |
2840 | netdev_err(dev, format: "failed to initialize RX ring\n" ); |
2841 | goto out_free_rx_ring; |
2842 | } |
2843 | |
2844 | /* RX pipe enable */ |
2845 | topctrl_writel(priv, val: 0, RX_FLUSH_CNTL); |
2846 | |
2847 | ret = rdma_enable_set(priv, enable: 1); |
2848 | if (ret) { |
2849 | netdev_err(dev, format: "failed to enable RDMA\n" ); |
2850 | goto out_free_rx_ring; |
2851 | } |
2852 | |
2853 | /* Restore enabled features */ |
2854 | bcm_sysport_set_features(dev, features: dev->features); |
2855 | |
2856 | rbuf_init(priv); |
2857 | |
2858 | /* Set maximum frame length */ |
2859 | if (!priv->is_lite) |
2860 | umac_writel(priv, UMAC_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN); |
2861 | else |
2862 | gib_set_pad_extension(priv); |
2863 | |
2864 | /* Set MAC address */ |
2865 | umac_set_hw_addr(priv, addr: dev->dev_addr); |
2866 | |
2867 | umac_enable_set(priv, CMD_RX_EN, enable: 1); |
2868 | |
2869 | /* TX pipe enable */ |
2870 | topctrl_writel(priv, val: 0, TX_FLUSH_CNTL); |
2871 | |
2872 | umac_enable_set(priv, CMD_TX_EN, enable: 1); |
2873 | |
2874 | ret = tdma_enable_set(priv, enable: 1); |
2875 | if (ret) { |
2876 | netdev_err(dev, format: "TDMA timeout!\n" ); |
2877 | goto out_free_rx_ring; |
2878 | } |
2879 | |
2880 | phy_resume(phydev: dev->phydev); |
2881 | |
2882 | bcm_sysport_netif_start(dev); |
2883 | |
2884 | netif_device_attach(dev); |
2885 | |
2886 | return 0; |
2887 | |
2888 | out_free_rx_ring: |
2889 | bcm_sysport_fini_rx_ring(priv); |
2890 | out_free_tx_rings: |
2891 | for (i = 0; i < dev->num_tx_queues; i++) |
2892 | bcm_sysport_fini_tx_ring(priv, index: i); |
2893 | clk_disable_unprepare(clk: priv->clk); |
2894 | return ret; |
2895 | } |
2896 | |
2897 | static SIMPLE_DEV_PM_OPS(bcm_sysport_pm_ops, |
2898 | bcm_sysport_suspend, bcm_sysport_resume); |
2899 | |
2900 | static struct platform_driver bcm_sysport_driver = { |
2901 | .probe = bcm_sysport_probe, |
2902 | .remove_new = bcm_sysport_remove, |
2903 | .driver = { |
2904 | .name = "brcm-systemport" , |
2905 | .of_match_table = bcm_sysport_of_match, |
2906 | .pm = &bcm_sysport_pm_ops, |
2907 | }, |
2908 | }; |
2909 | module_platform_driver(bcm_sysport_driver); |
2910 | |
2911 | MODULE_AUTHOR("Broadcom Corporation" ); |
2912 | MODULE_DESCRIPTION("Broadcom System Port Ethernet MAC driver" ); |
2913 | MODULE_ALIAS("platform:brcm-systemport" ); |
2914 | MODULE_LICENSE("GPL" ); |
2915 | |