1 /*******************************************************************************
2 This is the driver for the ST MAC 10/100/1000 on-chip Ethernet controllers.
3 ST Ethernet IPs are built around a Synopsys IP Core.
5 Copyright(C) 2007-2011 STMicroelectronics Ltd
7 This program is free software; you can redistribute it and/or modify it
8 under the terms and conditions of the GNU General Public License,
9 version 2, as published by the Free Software Foundation.
11 This program is distributed in the hope it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 The full GNU General Public License is included in this distribution in
17 the file called "COPYING".
19 Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
21 Documentation available at:
22 http://www.stlinux.com
24 https://bugzilla.stlinux.com/
25 *******************************************************************************/
27 #include <linux/clk.h>
28 #include <linux/kernel.h>
29 #include <linux/interrupt.h>
31 #include <linux/tcp.h>
32 #include <linux/skbuff.h>
33 #include <linux/ethtool.h>
34 #include <linux/if_ether.h>
35 #include <linux/crc32.h>
36 #include <linux/mii.h>
38 #include <linux/if_vlan.h>
39 #include <linux/dma-mapping.h>
40 #include <linux/slab.h>
41 #include <linux/prefetch.h>
42 #include <linux/pinctrl/consumer.h>
43 #ifdef CONFIG_DEBUG_FS
44 #include <linux/debugfs.h>
45 #include <linux/seq_file.h>
46 #endif /* CONFIG_DEBUG_FS */
47 #include <linux/net_tstamp.h>
48 #include "stmmac_ptp.h"
50 #include <linux/reset.h>
51 #include <linux/of_mdio.h>
52 #include "dwmac1000.h"
54 #define STMMAC_ALIGN(x) L1_CACHE_ALIGN(x)
55 #define TSO_MAX_BUFF_SIZE (SZ_16K - 1)
57 /* Module parameters */
59 static int watchdog
= TX_TIMEO
;
60 module_param(watchdog
, int, S_IRUGO
| S_IWUSR
);
61 MODULE_PARM_DESC(watchdog
, "Transmit timeout in milliseconds (default 5s)");
63 static int debug
= -1;
64 module_param(debug
, int, S_IRUGO
| S_IWUSR
);
65 MODULE_PARM_DESC(debug
, "Message Level (-1: default, 0: no output, 16: all)");
67 static int phyaddr
= -1;
68 module_param(phyaddr
, int, S_IRUGO
);
69 MODULE_PARM_DESC(phyaddr
, "Physical device address");
71 #define STMMAC_TX_THRESH (DMA_TX_SIZE / 4)
72 #define STMMAC_RX_THRESH (DMA_RX_SIZE / 4)
74 static int flow_ctrl
= FLOW_OFF
;
75 module_param(flow_ctrl
, int, S_IRUGO
| S_IWUSR
);
76 MODULE_PARM_DESC(flow_ctrl
, "Flow control ability [on/off]");
78 static int pause
= PAUSE_TIME
;
79 module_param(pause
, int, S_IRUGO
| S_IWUSR
);
80 MODULE_PARM_DESC(pause
, "Flow Control Pause Time");
83 static int tc
= TC_DEFAULT
;
84 module_param(tc
, int, S_IRUGO
| S_IWUSR
);
85 MODULE_PARM_DESC(tc
, "DMA threshold control value");
87 #define DEFAULT_BUFSIZE 1536
88 static int buf_sz
= DEFAULT_BUFSIZE
;
89 module_param(buf_sz
, int, S_IRUGO
| S_IWUSR
);
90 MODULE_PARM_DESC(buf_sz
, "DMA buffer size");
92 #define STMMAC_RX_COPYBREAK 256
94 static const u32 default_msg_level
= (NETIF_MSG_DRV
| NETIF_MSG_PROBE
|
95 NETIF_MSG_LINK
| NETIF_MSG_IFUP
|
96 NETIF_MSG_IFDOWN
| NETIF_MSG_TIMER
);
98 #define STMMAC_DEFAULT_LPI_TIMER 1000
99 static int eee_timer
= STMMAC_DEFAULT_LPI_TIMER
;
100 module_param(eee_timer
, int, S_IRUGO
| S_IWUSR
);
101 MODULE_PARM_DESC(eee_timer
, "LPI tx expiration time in msec");
102 #define STMMAC_LPI_T(x) (jiffies + msecs_to_jiffies(x))
104 /* By default the driver will use the ring mode to manage tx and rx descriptors,
105 * but allow user to force to use the chain instead of the ring
107 static unsigned int chain_mode
;
108 module_param(chain_mode
, int, S_IRUGO
);
109 MODULE_PARM_DESC(chain_mode
, "To use chain instead of ring mode");
111 static irqreturn_t
stmmac_interrupt(int irq
, void *dev_id
);
113 #ifdef CONFIG_DEBUG_FS
114 static int stmmac_init_fs(struct net_device
*dev
);
115 static void stmmac_exit_fs(struct net_device
*dev
);
118 #define STMMAC_COAL_TIMER(x) (jiffies + usecs_to_jiffies(x))
121 * stmmac_verify_args - verify the driver parameters.
122 * Description: it checks the driver parameters and set a default in case of
125 static void stmmac_verify_args(void)
127 if (unlikely(watchdog
< 0))
129 if (unlikely((buf_sz
< DEFAULT_BUFSIZE
) || (buf_sz
> BUF_SIZE_16KiB
)))
130 buf_sz
= DEFAULT_BUFSIZE
;
131 if (unlikely(flow_ctrl
> 1))
132 flow_ctrl
= FLOW_AUTO
;
133 else if (likely(flow_ctrl
< 0))
134 flow_ctrl
= FLOW_OFF
;
135 if (unlikely((pause
< 0) || (pause
> 0xffff)))
138 eee_timer
= STMMAC_DEFAULT_LPI_TIMER
;
142 * stmmac_disable_all_queues - Disable all queues
143 * @priv: driver private structure
145 static void stmmac_disable_all_queues(struct stmmac_priv
*priv
)
147 u32 rx_queues_cnt
= priv
->plat
->rx_queues_to_use
;
150 for (queue
= 0; queue
< rx_queues_cnt
; queue
++) {
151 struct stmmac_rx_queue
*rx_q
= &priv
->rx_queue
[queue
];
153 napi_disable(&rx_q
->napi
);
158 * stmmac_enable_all_queues - Enable all queues
159 * @priv: driver private structure
161 static void stmmac_enable_all_queues(struct stmmac_priv
*priv
)
163 u32 rx_queues_cnt
= priv
->plat
->rx_queues_to_use
;
166 for (queue
= 0; queue
< rx_queues_cnt
; queue
++) {
167 struct stmmac_rx_queue
*rx_q
= &priv
->rx_queue
[queue
];
169 napi_enable(&rx_q
->napi
);
174 * stmmac_stop_all_queues - Stop all queues
175 * @priv: driver private structure
177 static void stmmac_stop_all_queues(struct stmmac_priv
*priv
)
179 u32 tx_queues_cnt
= priv
->plat
->tx_queues_to_use
;
182 for (queue
= 0; queue
< tx_queues_cnt
; queue
++)
183 netif_tx_stop_queue(netdev_get_tx_queue(priv
->dev
, queue
));
187 * stmmac_start_all_queues - Start all queues
188 * @priv: driver private structure
190 static void stmmac_start_all_queues(struct stmmac_priv
*priv
)
192 u32 tx_queues_cnt
= priv
->plat
->tx_queues_to_use
;
195 for (queue
= 0; queue
< tx_queues_cnt
; queue
++)
196 netif_tx_start_queue(netdev_get_tx_queue(priv
->dev
, queue
));
200 * stmmac_clk_csr_set - dynamically set the MDC clock
201 * @priv: driver private structure
202 * Description: this is to dynamically set the MDC clock according to the csr
205 * If a specific clk_csr value is passed from the platform
206 * this means that the CSR Clock Range selection cannot be
207 * changed at run-time and it is fixed (as reported in the driver
208 * documentation). Viceversa the driver will try to set the MDC
209 * clock dynamically according to the actual clock input.
211 static void stmmac_clk_csr_set(struct stmmac_priv
*priv
)
215 clk_rate
= clk_get_rate(priv
->plat
->stmmac_clk
);
217 /* Platform provided default clk_csr would be assumed valid
218 * for all other cases except for the below mentioned ones.
219 * For values higher than the IEEE 802.3 specified frequency
220 * we can not estimate the proper divider as it is not known
221 * the frequency of clk_csr_i. So we do not change the default
224 if (!(priv
->clk_csr
& MAC_CSR_H_FRQ_MASK
)) {
225 if (clk_rate
< CSR_F_35M
)
226 priv
->clk_csr
= STMMAC_CSR_20_35M
;
227 else if ((clk_rate
>= CSR_F_35M
) && (clk_rate
< CSR_F_60M
))
228 priv
->clk_csr
= STMMAC_CSR_35_60M
;
229 else if ((clk_rate
>= CSR_F_60M
) && (clk_rate
< CSR_F_100M
))
230 priv
->clk_csr
= STMMAC_CSR_60_100M
;
231 else if ((clk_rate
>= CSR_F_100M
) && (clk_rate
< CSR_F_150M
))
232 priv
->clk_csr
= STMMAC_CSR_100_150M
;
233 else if ((clk_rate
>= CSR_F_150M
) && (clk_rate
< CSR_F_250M
))
234 priv
->clk_csr
= STMMAC_CSR_150_250M
;
235 else if ((clk_rate
>= CSR_F_250M
) && (clk_rate
< CSR_F_300M
))
236 priv
->clk_csr
= STMMAC_CSR_250_300M
;
239 if (priv
->plat
->has_sun8i
) {
240 if (clk_rate
> 160000000)
241 priv
->clk_csr
= 0x03;
242 else if (clk_rate
> 80000000)
243 priv
->clk_csr
= 0x02;
244 else if (clk_rate
> 40000000)
245 priv
->clk_csr
= 0x01;
251 static void print_pkt(unsigned char *buf
, int len
)
253 pr_debug("len = %d byte, buf addr: 0x%p\n", len
, buf
);
254 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET
, buf
, len
);
257 static inline u32
stmmac_tx_avail(struct stmmac_priv
*priv
, u32 queue
)
259 struct stmmac_tx_queue
*tx_q
= &priv
->tx_queue
[queue
];
262 if (tx_q
->dirty_tx
> tx_q
->cur_tx
)
263 avail
= tx_q
->dirty_tx
- tx_q
->cur_tx
- 1;
265 avail
= DMA_TX_SIZE
- tx_q
->cur_tx
+ tx_q
->dirty_tx
- 1;
271 * stmmac_rx_dirty - Get RX queue dirty
272 * @priv: driver private structure
273 * @queue: RX queue index
275 static inline u32
stmmac_rx_dirty(struct stmmac_priv
*priv
, u32 queue
)
277 struct stmmac_rx_queue
*rx_q
= &priv
->rx_queue
[queue
];
280 if (rx_q
->dirty_rx
<= rx_q
->cur_rx
)
281 dirty
= rx_q
->cur_rx
- rx_q
->dirty_rx
;
283 dirty
= DMA_RX_SIZE
- rx_q
->dirty_rx
+ rx_q
->cur_rx
;
289 * stmmac_hw_fix_mac_speed - callback for speed selection
290 * @priv: driver private structure
291 * Description: on some platforms (e.g. ST), some HW system configuration
292 * registers have to be set according to the link speed negotiated.
294 static inline void stmmac_hw_fix_mac_speed(struct stmmac_priv
*priv
)
296 struct net_device
*ndev
= priv
->dev
;
297 struct phy_device
*phydev
= ndev
->phydev
;
299 if (likely(priv
->plat
->fix_mac_speed
))
300 priv
->plat
->fix_mac_speed(priv
->plat
->bsp_priv
, phydev
->speed
);
304 * stmmac_enable_eee_mode - check and enter in LPI mode
305 * @priv: driver private structure
306 * Description: this function is to verify and enter in LPI mode in case of
309 static void stmmac_enable_eee_mode(struct stmmac_priv
*priv
)
311 u32 tx_cnt
= priv
->plat
->tx_queues_to_use
;
314 /* check if all TX queues have the work finished */
315 for (queue
= 0; queue
< tx_cnt
; queue
++) {
316 struct stmmac_tx_queue
*tx_q
= &priv
->tx_queue
[queue
];
318 if (tx_q
->dirty_tx
!= tx_q
->cur_tx
)
319 return; /* still unfinished work */
322 /* Check and enter in LPI mode */
323 if (!priv
->tx_path_in_lpi_mode
)
324 priv
->hw
->mac
->set_eee_mode(priv
->hw
,
325 priv
->plat
->en_tx_lpi_clockgating
);
329 * stmmac_disable_eee_mode - disable and exit from LPI mode
330 * @priv: driver private structure
331 * Description: this function is to exit and disable EEE in case of
332 * LPI state is true. This is called by the xmit.
334 void stmmac_disable_eee_mode(struct stmmac_priv
*priv
)
336 priv
->hw
->mac
->reset_eee_mode(priv
->hw
);
337 del_timer_sync(&priv
->eee_ctrl_timer
);
338 priv
->tx_path_in_lpi_mode
= false;
342 * stmmac_eee_ctrl_timer - EEE TX SW timer.
345 * if there is no data transfer and if we are not in LPI state,
346 * then MAC Transmitter can be moved to LPI state.
348 static void stmmac_eee_ctrl_timer(unsigned long arg
)
350 struct stmmac_priv
*priv
= (struct stmmac_priv
*)arg
;
352 stmmac_enable_eee_mode(priv
);
353 mod_timer(&priv
->eee_ctrl_timer
, STMMAC_LPI_T(eee_timer
));
357 * stmmac_eee_init - init EEE
358 * @priv: driver private structure
360 * if the GMAC supports the EEE (from the HW cap reg) and the phy device
361 * can also manage EEE, this function enable the LPI state and start related
364 bool stmmac_eee_init(struct stmmac_priv
*priv
)
366 struct net_device
*ndev
= priv
->dev
;
370 /* Using PCS we cannot dial with the phy registers at this stage
371 * so we do not support extra feature like EEE.
373 if ((priv
->hw
->pcs
== STMMAC_PCS_RGMII
) ||
374 (priv
->hw
->pcs
== STMMAC_PCS_TBI
) ||
375 (priv
->hw
->pcs
== STMMAC_PCS_RTBI
))
378 /* MAC core supports the EEE feature. */
379 if (priv
->dma_cap
.eee
) {
380 int tx_lpi_timer
= priv
->tx_lpi_timer
;
382 /* Check if the PHY supports EEE */
383 if (phy_init_eee(ndev
->phydev
, 1)) {
384 /* To manage at run-time if the EEE cannot be supported
385 * anymore (for example because the lp caps have been
387 * In that case the driver disable own timers.
389 spin_lock_irqsave(&priv
->lock
, flags
);
390 if (priv
->eee_active
) {
391 netdev_dbg(priv
->dev
, "disable EEE\n");
392 del_timer_sync(&priv
->eee_ctrl_timer
);
393 priv
->hw
->mac
->set_eee_timer(priv
->hw
, 0,
396 priv
->eee_active
= 0;
397 spin_unlock_irqrestore(&priv
->lock
, flags
);
400 /* Activate the EEE and start timers */
401 spin_lock_irqsave(&priv
->lock
, flags
);
402 if (!priv
->eee_active
) {
403 priv
->eee_active
= 1;
404 setup_timer(&priv
->eee_ctrl_timer
,
405 stmmac_eee_ctrl_timer
,
406 (unsigned long)priv
);
407 mod_timer(&priv
->eee_ctrl_timer
,
408 STMMAC_LPI_T(eee_timer
));
410 priv
->hw
->mac
->set_eee_timer(priv
->hw
,
411 STMMAC_DEFAULT_LIT_LS
,
414 /* Set HW EEE according to the speed */
415 priv
->hw
->mac
->set_eee_pls(priv
->hw
, ndev
->phydev
->link
);
418 spin_unlock_irqrestore(&priv
->lock
, flags
);
420 netdev_dbg(priv
->dev
, "Energy-Efficient Ethernet initialized\n");
426 /* stmmac_get_tx_hwtstamp - get HW TX timestamps
427 * @priv: driver private structure
428 * @p : descriptor pointer
429 * @skb : the socket buffer
431 * This function will read timestamp from the descriptor & pass it to stack.
432 * and also perform some sanity checks.
434 static void stmmac_get_tx_hwtstamp(struct stmmac_priv
*priv
,
435 struct dma_desc
*p
, struct sk_buff
*skb
)
437 struct skb_shared_hwtstamps shhwtstamp
;
440 if (!priv
->hwts_tx_en
)
443 /* exit if skb doesn't support hw tstamp */
444 if (likely(!skb
|| !(skb_shinfo(skb
)->tx_flags
& SKBTX_IN_PROGRESS
)))
447 /* check tx tstamp status */
448 if (priv
->hw
->desc
->get_tx_timestamp_status(p
)) {
449 /* get the valid tstamp */
450 ns
= priv
->hw
->desc
->get_timestamp(p
, priv
->adv_ts
);
452 memset(&shhwtstamp
, 0, sizeof(struct skb_shared_hwtstamps
));
453 shhwtstamp
.hwtstamp
= ns_to_ktime(ns
);
455 netdev_dbg(priv
->dev
, "get valid TX hw timestamp %llu\n", ns
);
456 /* pass tstamp to stack */
457 skb_tstamp_tx(skb
, &shhwtstamp
);
463 /* stmmac_get_rx_hwtstamp - get HW RX timestamps
464 * @priv: driver private structure
465 * @p : descriptor pointer
466 * @np : next descriptor pointer
467 * @skb : the socket buffer
469 * This function will read received packet's timestamp from the descriptor
470 * and pass it to stack. It also perform some sanity checks.
472 static void stmmac_get_rx_hwtstamp(struct stmmac_priv
*priv
, struct dma_desc
*p
,
473 struct dma_desc
*np
, struct sk_buff
*skb
)
475 struct skb_shared_hwtstamps
*shhwtstamp
= NULL
;
478 if (!priv
->hwts_rx_en
)
481 /* Check if timestamp is available */
482 if (priv
->hw
->desc
->get_rx_timestamp_status(p
, priv
->adv_ts
)) {
483 /* For GMAC4, the valid timestamp is from CTX next desc. */
484 if (priv
->plat
->has_gmac4
)
485 ns
= priv
->hw
->desc
->get_timestamp(np
, priv
->adv_ts
);
487 ns
= priv
->hw
->desc
->get_timestamp(p
, priv
->adv_ts
);
489 netdev_dbg(priv
->dev
, "get valid RX hw timestamp %llu\n", ns
);
490 shhwtstamp
= skb_hwtstamps(skb
);
491 memset(shhwtstamp
, 0, sizeof(struct skb_shared_hwtstamps
));
492 shhwtstamp
->hwtstamp
= ns_to_ktime(ns
);
494 netdev_dbg(priv
->dev
, "cannot get RX hw timestamp\n");
499 * stmmac_hwtstamp_ioctl - control hardware timestamping.
500 * @dev: device pointer.
501 * @ifr: An IOCTL specific structure, that can contain a pointer to
502 * a proprietary structure used to pass information to the driver.
504 * This function configures the MAC to enable/disable both outgoing(TX)
505 * and incoming(RX) packets time stamping based on user input.
507 * 0 on success and an appropriate -ve integer on failure.
509 static int stmmac_hwtstamp_ioctl(struct net_device
*dev
, struct ifreq
*ifr
)
511 struct stmmac_priv
*priv
= netdev_priv(dev
);
512 struct hwtstamp_config config
;
513 struct timespec64 now
;
517 u32 ptp_over_ipv4_udp
= 0;
518 u32 ptp_over_ipv6_udp
= 0;
519 u32 ptp_over_ethernet
= 0;
520 u32 snap_type_sel
= 0;
521 u32 ts_master_en
= 0;
526 if (!(priv
->dma_cap
.time_stamp
|| priv
->adv_ts
)) {
527 netdev_alert(priv
->dev
, "No support for HW time stamping\n");
528 priv
->hwts_tx_en
= 0;
529 priv
->hwts_rx_en
= 0;
534 if (copy_from_user(&config
, ifr
->ifr_data
,
535 sizeof(struct hwtstamp_config
)))
538 netdev_dbg(priv
->dev
, "%s config flags:0x%x, tx_type:0x%x, rx_filter:0x%x\n",
539 __func__
, config
.flags
, config
.tx_type
, config
.rx_filter
);
541 /* reserved for future extensions */
545 if (config
.tx_type
!= HWTSTAMP_TX_OFF
&&
546 config
.tx_type
!= HWTSTAMP_TX_ON
)
550 switch (config
.rx_filter
) {
551 case HWTSTAMP_FILTER_NONE
:
552 /* time stamp no incoming packet at all */
553 config
.rx_filter
= HWTSTAMP_FILTER_NONE
;
556 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT
:
557 /* PTP v1, UDP, any kind of event packet */
558 config
.rx_filter
= HWTSTAMP_FILTER_PTP_V1_L4_EVENT
;
559 /* take time stamp for all event messages */
560 if (priv
->plat
->has_gmac4
)
561 snap_type_sel
= PTP_GMAC4_TCR_SNAPTYPSEL_1
;
563 snap_type_sel
= PTP_TCR_SNAPTYPSEL_1
;
565 ptp_over_ipv4_udp
= PTP_TCR_TSIPV4ENA
;
566 ptp_over_ipv6_udp
= PTP_TCR_TSIPV6ENA
;
569 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC
:
570 /* PTP v1, UDP, Sync packet */
571 config
.rx_filter
= HWTSTAMP_FILTER_PTP_V1_L4_SYNC
;
572 /* take time stamp for SYNC messages only */
573 ts_event_en
= PTP_TCR_TSEVNTENA
;
575 ptp_over_ipv4_udp
= PTP_TCR_TSIPV4ENA
;
576 ptp_over_ipv6_udp
= PTP_TCR_TSIPV6ENA
;
579 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ
:
580 /* PTP v1, UDP, Delay_req packet */
581 config
.rx_filter
= HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ
;
582 /* take time stamp for Delay_Req messages only */
583 ts_master_en
= PTP_TCR_TSMSTRENA
;
584 ts_event_en
= PTP_TCR_TSEVNTENA
;
586 ptp_over_ipv4_udp
= PTP_TCR_TSIPV4ENA
;
587 ptp_over_ipv6_udp
= PTP_TCR_TSIPV6ENA
;
590 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT
:
591 /* PTP v2, UDP, any kind of event packet */
592 config
.rx_filter
= HWTSTAMP_FILTER_PTP_V2_L4_EVENT
;
593 ptp_v2
= PTP_TCR_TSVER2ENA
;
594 /* take time stamp for all event messages */
595 if (priv
->plat
->has_gmac4
)
596 snap_type_sel
= PTP_GMAC4_TCR_SNAPTYPSEL_1
;
598 snap_type_sel
= PTP_TCR_SNAPTYPSEL_1
;
600 ptp_over_ipv4_udp
= PTP_TCR_TSIPV4ENA
;
601 ptp_over_ipv6_udp
= PTP_TCR_TSIPV6ENA
;
604 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC
:
605 /* PTP v2, UDP, Sync packet */
606 config
.rx_filter
= HWTSTAMP_FILTER_PTP_V2_L4_SYNC
;
607 ptp_v2
= PTP_TCR_TSVER2ENA
;
608 /* take time stamp for SYNC messages only */
609 ts_event_en
= PTP_TCR_TSEVNTENA
;
611 ptp_over_ipv4_udp
= PTP_TCR_TSIPV4ENA
;
612 ptp_over_ipv6_udp
= PTP_TCR_TSIPV6ENA
;
615 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ
:
616 /* PTP v2, UDP, Delay_req packet */
617 config
.rx_filter
= HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ
;
618 ptp_v2
= PTP_TCR_TSVER2ENA
;
619 /* take time stamp for Delay_Req messages only */
620 ts_master_en
= PTP_TCR_TSMSTRENA
;
621 ts_event_en
= PTP_TCR_TSEVNTENA
;
623 ptp_over_ipv4_udp
= PTP_TCR_TSIPV4ENA
;
624 ptp_over_ipv6_udp
= PTP_TCR_TSIPV6ENA
;
627 case HWTSTAMP_FILTER_PTP_V2_EVENT
:
628 /* PTP v2/802.AS1 any layer, any kind of event packet */
629 config
.rx_filter
= HWTSTAMP_FILTER_PTP_V2_EVENT
;
630 ptp_v2
= PTP_TCR_TSVER2ENA
;
631 /* take time stamp for all event messages */
632 if (priv
->plat
->has_gmac4
)
633 snap_type_sel
= PTP_GMAC4_TCR_SNAPTYPSEL_1
;
635 snap_type_sel
= PTP_TCR_SNAPTYPSEL_1
;
637 ptp_over_ipv4_udp
= PTP_TCR_TSIPV4ENA
;
638 ptp_over_ipv6_udp
= PTP_TCR_TSIPV6ENA
;
639 ptp_over_ethernet
= PTP_TCR_TSIPENA
;
642 case HWTSTAMP_FILTER_PTP_V2_SYNC
:
643 /* PTP v2/802.AS1, any layer, Sync packet */
644 config
.rx_filter
= HWTSTAMP_FILTER_PTP_V2_SYNC
;
645 ptp_v2
= PTP_TCR_TSVER2ENA
;
646 /* take time stamp for SYNC messages only */
647 ts_event_en
= PTP_TCR_TSEVNTENA
;
649 ptp_over_ipv4_udp
= PTP_TCR_TSIPV4ENA
;
650 ptp_over_ipv6_udp
= PTP_TCR_TSIPV6ENA
;
651 ptp_over_ethernet
= PTP_TCR_TSIPENA
;
654 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ
:
655 /* PTP v2/802.AS1, any layer, Delay_req packet */
656 config
.rx_filter
= HWTSTAMP_FILTER_PTP_V2_DELAY_REQ
;
657 ptp_v2
= PTP_TCR_TSVER2ENA
;
658 /* take time stamp for Delay_Req messages only */
659 ts_master_en
= PTP_TCR_TSMSTRENA
;
660 ts_event_en
= PTP_TCR_TSEVNTENA
;
662 ptp_over_ipv4_udp
= PTP_TCR_TSIPV4ENA
;
663 ptp_over_ipv6_udp
= PTP_TCR_TSIPV6ENA
;
664 ptp_over_ethernet
= PTP_TCR_TSIPENA
;
667 case HWTSTAMP_FILTER_NTP_ALL
:
668 case HWTSTAMP_FILTER_ALL
:
669 /* time stamp any incoming packet */
670 config
.rx_filter
= HWTSTAMP_FILTER_ALL
;
671 tstamp_all
= PTP_TCR_TSENALL
;
678 switch (config
.rx_filter
) {
679 case HWTSTAMP_FILTER_NONE
:
680 config
.rx_filter
= HWTSTAMP_FILTER_NONE
;
683 /* PTP v1, UDP, any kind of event packet */
684 config
.rx_filter
= HWTSTAMP_FILTER_PTP_V1_L4_EVENT
;
688 priv
->hwts_rx_en
= ((config
.rx_filter
== HWTSTAMP_FILTER_NONE
) ? 0 : 1);
689 priv
->hwts_tx_en
= config
.tx_type
== HWTSTAMP_TX_ON
;
691 if (!priv
->hwts_tx_en
&& !priv
->hwts_rx_en
)
692 priv
->hw
->ptp
->config_hw_tstamping(priv
->ptpaddr
, 0);
694 value
= (PTP_TCR_TSENA
| PTP_TCR_TSCFUPDT
| PTP_TCR_TSCTRLSSR
|
695 tstamp_all
| ptp_v2
| ptp_over_ethernet
|
696 ptp_over_ipv6_udp
| ptp_over_ipv4_udp
| ts_event_en
|
697 ts_master_en
| snap_type_sel
);
698 priv
->hw
->ptp
->config_hw_tstamping(priv
->ptpaddr
, value
);
700 /* program Sub Second Increment reg */
701 sec_inc
= priv
->hw
->ptp
->config_sub_second_increment(
702 priv
->ptpaddr
, priv
->plat
->clk_ptp_rate
,
703 priv
->plat
->has_gmac4
);
704 temp
= div_u64(1000000000ULL, sec_inc
);
706 /* calculate default added value:
708 * addend = (2^32)/freq_div_ratio;
709 * where, freq_div_ratio = 1e9ns/sec_inc
711 temp
= (u64
)(temp
<< 32);
712 priv
->default_addend
= div_u64(temp
, priv
->plat
->clk_ptp_rate
);
713 priv
->hw
->ptp
->config_addend(priv
->ptpaddr
,
714 priv
->default_addend
);
716 /* initialize system time */
717 ktime_get_real_ts64(&now
);
719 /* lower 32 bits of tv_sec are safe until y2106 */
720 priv
->hw
->ptp
->init_systime(priv
->ptpaddr
, (u32
)now
.tv_sec
,
724 return copy_to_user(ifr
->ifr_data
, &config
,
725 sizeof(struct hwtstamp_config
)) ? -EFAULT
: 0;
729 * stmmac_init_ptp - init PTP
730 * @priv: driver private structure
731 * Description: this is to verify if the HW supports the PTPv1 or PTPv2.
732 * This is done by looking at the HW cap. register.
733 * This function also registers the ptp driver.
735 static int stmmac_init_ptp(struct stmmac_priv
*priv
)
737 if (!(priv
->dma_cap
.time_stamp
|| priv
->dma_cap
.atime_stamp
))
741 /* Check if adv_ts can be enabled for dwmac 4.x core */
742 if (priv
->plat
->has_gmac4
&& priv
->dma_cap
.atime_stamp
)
744 /* Dwmac 3.x core with extend_desc can support adv_ts */
745 else if (priv
->extend_desc
&& priv
->dma_cap
.atime_stamp
)
748 if (priv
->dma_cap
.time_stamp
)
749 netdev_info(priv
->dev
, "IEEE 1588-2002 Timestamp supported\n");
752 netdev_info(priv
->dev
,
753 "IEEE 1588-2008 Advanced Timestamp supported\n");
755 priv
->hw
->ptp
= &stmmac_ptp
;
756 priv
->hwts_tx_en
= 0;
757 priv
->hwts_rx_en
= 0;
759 stmmac_ptp_register(priv
);
764 static void stmmac_release_ptp(struct stmmac_priv
*priv
)
766 if (priv
->plat
->clk_ptp_ref
)
767 clk_disable_unprepare(priv
->plat
->clk_ptp_ref
);
768 stmmac_ptp_unregister(priv
);
772 * stmmac_mac_flow_ctrl - Configure flow control in all queues
773 * @priv: driver private structure
774 * Description: It is used for configuring the flow control in all queues
776 static void stmmac_mac_flow_ctrl(struct stmmac_priv
*priv
, u32 duplex
)
778 u32 tx_cnt
= priv
->plat
->tx_queues_to_use
;
780 priv
->hw
->mac
->flow_ctrl(priv
->hw
, duplex
, priv
->flow_ctrl
,
781 priv
->pause
, tx_cnt
);
785 * stmmac_adjust_link - adjusts the link parameters
786 * @dev: net device structure
787 * Description: this is the helper called by the physical abstraction layer
788 * drivers to communicate the phy link status. According the speed and duplex
789 * this driver can invoke registered glue-logic as well.
790 * It also invoke the eee initialization because it could happen when switch
791 * on different networks (that are eee capable).
793 static void stmmac_adjust_link(struct net_device
*dev
)
795 struct stmmac_priv
*priv
= netdev_priv(dev
);
796 struct phy_device
*phydev
= dev
->phydev
;
798 bool new_state
= false;
803 spin_lock_irqsave(&priv
->lock
, flags
);
806 u32 ctrl
= readl(priv
->ioaddr
+ MAC_CTRL_REG
);
808 /* Now we make sure that we can be in full duplex mode.
809 * If not, we operate in half-duplex mode. */
810 if (phydev
->duplex
!= priv
->oldduplex
) {
813 ctrl
&= ~priv
->hw
->link
.duplex
;
815 ctrl
|= priv
->hw
->link
.duplex
;
816 priv
->oldduplex
= phydev
->duplex
;
818 /* Flow Control operation */
820 stmmac_mac_flow_ctrl(priv
, phydev
->duplex
);
822 if (phydev
->speed
!= priv
->speed
) {
824 ctrl
&= ~priv
->hw
->link
.speed_mask
;
825 switch (phydev
->speed
) {
827 ctrl
|= priv
->hw
->link
.speed1000
;
830 ctrl
|= priv
->hw
->link
.speed100
;
833 ctrl
|= priv
->hw
->link
.speed10
;
836 netif_warn(priv
, link
, priv
->dev
,
837 "broken speed: %d\n", phydev
->speed
);
838 phydev
->speed
= SPEED_UNKNOWN
;
841 if (phydev
->speed
!= SPEED_UNKNOWN
)
842 stmmac_hw_fix_mac_speed(priv
);
843 priv
->speed
= phydev
->speed
;
846 writel(ctrl
, priv
->ioaddr
+ MAC_CTRL_REG
);
848 if (!priv
->oldlink
) {
850 priv
->oldlink
= true;
852 } else if (priv
->oldlink
) {
854 priv
->oldlink
= false;
855 priv
->speed
= SPEED_UNKNOWN
;
856 priv
->oldduplex
= DUPLEX_UNKNOWN
;
859 if (new_state
&& netif_msg_link(priv
))
860 phy_print_status(phydev
);
862 spin_unlock_irqrestore(&priv
->lock
, flags
);
864 if (phydev
->is_pseudo_fixed_link
)
865 /* Stop PHY layer to call the hook to adjust the link in case
866 * of a switch is attached to the stmmac driver.
868 phydev
->irq
= PHY_IGNORE_INTERRUPT
;
870 /* At this stage, init the EEE if supported.
871 * Never called in case of fixed_link.
873 priv
->eee_enabled
= stmmac_eee_init(priv
);
877 * stmmac_check_pcs_mode - verify if RGMII/SGMII is supported
878 * @priv: driver private structure
879 * Description: this is to verify if the HW supports the PCS.
880 * Physical Coding Sublayer (PCS) interface that can be used when the MAC is
881 * configured for the TBI, RTBI, or SGMII PHY interface.
883 static void stmmac_check_pcs_mode(struct stmmac_priv
*priv
)
885 int interface
= priv
->plat
->interface
;
887 if (priv
->dma_cap
.pcs
) {
888 if ((interface
== PHY_INTERFACE_MODE_RGMII
) ||
889 (interface
== PHY_INTERFACE_MODE_RGMII_ID
) ||
890 (interface
== PHY_INTERFACE_MODE_RGMII_RXID
) ||
891 (interface
== PHY_INTERFACE_MODE_RGMII_TXID
)) {
892 netdev_dbg(priv
->dev
, "PCS RGMII support enabled\n");
893 priv
->hw
->pcs
= STMMAC_PCS_RGMII
;
894 } else if (interface
== PHY_INTERFACE_MODE_SGMII
) {
895 netdev_dbg(priv
->dev
, "PCS SGMII support enabled\n");
896 priv
->hw
->pcs
= STMMAC_PCS_SGMII
;
902 * stmmac_init_phy - PHY initialization
903 * @dev: net device structure
904 * Description: it initializes the driver's PHY state, and attaches the PHY
909 static int stmmac_init_phy(struct net_device
*dev
)
911 struct stmmac_priv
*priv
= netdev_priv(dev
);
912 struct phy_device
*phydev
;
913 char phy_id_fmt
[MII_BUS_ID_SIZE
+ 3];
914 char bus_id
[MII_BUS_ID_SIZE
];
915 int interface
= priv
->plat
->interface
;
916 int max_speed
= priv
->plat
->max_speed
;
917 priv
->oldlink
= false;
918 priv
->speed
= SPEED_UNKNOWN
;
919 priv
->oldduplex
= DUPLEX_UNKNOWN
;
921 if (priv
->plat
->phy_node
) {
922 phydev
= of_phy_connect(dev
, priv
->plat
->phy_node
,
923 &stmmac_adjust_link
, 0, interface
);
925 snprintf(bus_id
, MII_BUS_ID_SIZE
, "stmmac-%x",
928 snprintf(phy_id_fmt
, MII_BUS_ID_SIZE
+ 3, PHY_ID_FMT
, bus_id
,
929 priv
->plat
->phy_addr
);
930 netdev_dbg(priv
->dev
, "%s: trying to attach to %s\n", __func__
,
933 phydev
= phy_connect(dev
, phy_id_fmt
, &stmmac_adjust_link
,
937 if (IS_ERR_OR_NULL(phydev
)) {
938 netdev_err(priv
->dev
, "Could not attach to PHY\n");
942 return PTR_ERR(phydev
);
945 /* Stop Advertising 1000BASE Capability if interface is not GMII */
946 if ((interface
== PHY_INTERFACE_MODE_MII
) ||
947 (interface
== PHY_INTERFACE_MODE_RMII
) ||
948 (max_speed
< 1000 && max_speed
> 0))
949 phydev
->advertising
&= ~(SUPPORTED_1000baseT_Half
|
950 SUPPORTED_1000baseT_Full
);
953 * Broken HW is sometimes missing the pull-up resistor on the
954 * MDIO line, which results in reads to non-existent devices returning
955 * 0 rather than 0xffff. Catch this here and treat 0 as a non-existent
957 * Note: phydev->phy_id is the result of reading the UID PHY registers.
959 if (!priv
->plat
->phy_node
&& phydev
->phy_id
== 0) {
960 phy_disconnect(phydev
);
964 /* stmmac_adjust_link will change this to PHY_IGNORE_INTERRUPT to avoid
965 * subsequent PHY polling, make sure we force a link transition if
966 * we have a UP/DOWN/UP transition
968 if (phydev
->is_pseudo_fixed_link
)
969 phydev
->irq
= PHY_POLL
;
971 phy_attached_info(phydev
);
975 static void stmmac_display_rx_rings(struct stmmac_priv
*priv
)
977 u32 rx_cnt
= priv
->plat
->rx_queues_to_use
;
981 /* Display RX rings */
982 for (queue
= 0; queue
< rx_cnt
; queue
++) {
983 struct stmmac_rx_queue
*rx_q
= &priv
->rx_queue
[queue
];
985 pr_info("\tRX Queue %u rings\n", queue
);
987 if (priv
->extend_desc
)
988 head_rx
= (void *)rx_q
->dma_erx
;
990 head_rx
= (void *)rx_q
->dma_rx
;
992 /* Display RX ring */
993 priv
->hw
->desc
->display_ring(head_rx
, DMA_RX_SIZE
, true);
997 static void stmmac_display_tx_rings(struct stmmac_priv
*priv
)
999 u32 tx_cnt
= priv
->plat
->tx_queues_to_use
;
1003 /* Display TX rings */
1004 for (queue
= 0; queue
< tx_cnt
; queue
++) {
1005 struct stmmac_tx_queue
*tx_q
= &priv
->tx_queue
[queue
];
1007 pr_info("\tTX Queue %d rings\n", queue
);
1009 if (priv
->extend_desc
)
1010 head_tx
= (void *)tx_q
->dma_etx
;
1012 head_tx
= (void *)tx_q
->dma_tx
;
1014 priv
->hw
->desc
->display_ring(head_tx
, DMA_TX_SIZE
, false);
1018 static void stmmac_display_rings(struct stmmac_priv
*priv
)
1020 /* Display RX ring */
1021 stmmac_display_rx_rings(priv
);
1023 /* Display TX ring */
1024 stmmac_display_tx_rings(priv
);
1027 static int stmmac_set_bfsize(int mtu
, int bufsize
)
1031 if (mtu
>= BUF_SIZE_4KiB
)
1032 ret
= BUF_SIZE_8KiB
;
1033 else if (mtu
>= BUF_SIZE_2KiB
)
1034 ret
= BUF_SIZE_4KiB
;
1035 else if (mtu
> DEFAULT_BUFSIZE
)
1036 ret
= BUF_SIZE_2KiB
;
1038 ret
= DEFAULT_BUFSIZE
;
1044 * stmmac_clear_rx_descriptors - clear RX descriptors
1045 * @priv: driver private structure
1046 * @queue: RX queue index
1047 * Description: this function is called to clear the RX descriptors
1048 * in case of both basic and extended descriptors are used.
1050 static void stmmac_clear_rx_descriptors(struct stmmac_priv
*priv
, u32 queue
)
1052 struct stmmac_rx_queue
*rx_q
= &priv
->rx_queue
[queue
];
1055 /* Clear the RX descriptors */
1056 for (i
= 0; i
< DMA_RX_SIZE
; i
++)
1057 if (priv
->extend_desc
)
1058 priv
->hw
->desc
->init_rx_desc(&rx_q
->dma_erx
[i
].basic
,
1059 priv
->use_riwt
, priv
->mode
,
1060 (i
== DMA_RX_SIZE
- 1));
1062 priv
->hw
->desc
->init_rx_desc(&rx_q
->dma_rx
[i
],
1063 priv
->use_riwt
, priv
->mode
,
1064 (i
== DMA_RX_SIZE
- 1));
1068 * stmmac_clear_tx_descriptors - clear tx descriptors
1069 * @priv: driver private structure
1070 * @queue: TX queue index.
1071 * Description: this function is called to clear the TX descriptors
1072 * in case of both basic and extended descriptors are used.
1074 static void stmmac_clear_tx_descriptors(struct stmmac_priv
*priv
, u32 queue
)
1076 struct stmmac_tx_queue
*tx_q
= &priv
->tx_queue
[queue
];
1079 /* Clear the TX descriptors */
1080 for (i
= 0; i
< DMA_TX_SIZE
; i
++)
1081 if (priv
->extend_desc
)
1082 priv
->hw
->desc
->init_tx_desc(&tx_q
->dma_etx
[i
].basic
,
1084 (i
== DMA_TX_SIZE
- 1));
1086 priv
->hw
->desc
->init_tx_desc(&tx_q
->dma_tx
[i
],
1088 (i
== DMA_TX_SIZE
- 1));
1092 * stmmac_clear_descriptors - clear descriptors
1093 * @priv: driver private structure
1094 * Description: this function is called to clear the TX and RX descriptors
1095 * in case of both basic and extended descriptors are used.
1097 static void stmmac_clear_descriptors(struct stmmac_priv
*priv
)
1099 u32 rx_queue_cnt
= priv
->plat
->rx_queues_to_use
;
1100 u32 tx_queue_cnt
= priv
->plat
->tx_queues_to_use
;
1103 /* Clear the RX descriptors */
1104 for (queue
= 0; queue
< rx_queue_cnt
; queue
++)
1105 stmmac_clear_rx_descriptors(priv
, queue
);
1107 /* Clear the TX descriptors */
1108 for (queue
= 0; queue
< tx_queue_cnt
; queue
++)
1109 stmmac_clear_tx_descriptors(priv
, queue
);
1113 * stmmac_init_rx_buffers - init the RX descriptor buffer.
1114 * @priv: driver private structure
1115 * @p: descriptor pointer
1116 * @i: descriptor index
1118 * @queue: RX queue index
1119 * Description: this function is called to allocate a receive buffer, perform
1120 * the DMA mapping and init the descriptor.
1122 static int stmmac_init_rx_buffers(struct stmmac_priv
*priv
, struct dma_desc
*p
,
1123 int i
, gfp_t flags
, u32 queue
)
1125 struct stmmac_rx_queue
*rx_q
= &priv
->rx_queue
[queue
];
1126 struct sk_buff
*skb
;
1128 skb
= __netdev_alloc_skb_ip_align(priv
->dev
, priv
->dma_buf_sz
, flags
);
1130 netdev_err(priv
->dev
,
1131 "%s: Rx init fails; skb is NULL\n", __func__
);
1134 rx_q
->rx_skbuff
[i
] = skb
;
1135 rx_q
->rx_skbuff_dma
[i
] = dma_map_single(priv
->device
, skb
->data
,
1138 if (dma_mapping_error(priv
->device
, rx_q
->rx_skbuff_dma
[i
])) {
1139 netdev_err(priv
->dev
, "%s: DMA mapping error\n", __func__
);
1140 dev_kfree_skb_any(skb
);
1144 if (priv
->synopsys_id
>= DWMAC_CORE_4_00
)
1145 p
->des0
= cpu_to_le32(rx_q
->rx_skbuff_dma
[i
]);
1147 p
->des2
= cpu_to_le32(rx_q
->rx_skbuff_dma
[i
]);
1149 if ((priv
->hw
->mode
->init_desc3
) &&
1150 (priv
->dma_buf_sz
== BUF_SIZE_16KiB
))
1151 priv
->hw
->mode
->init_desc3(p
);
1157 * stmmac_free_rx_buffer - free RX dma buffers
1158 * @priv: private structure
1159 * @queue: RX queue index
1162 static void stmmac_free_rx_buffer(struct stmmac_priv
*priv
, u32 queue
, int i
)
1164 struct stmmac_rx_queue
*rx_q
= &priv
->rx_queue
[queue
];
1166 if (rx_q
->rx_skbuff
[i
]) {
1167 dma_unmap_single(priv
->device
, rx_q
->rx_skbuff_dma
[i
],
1168 priv
->dma_buf_sz
, DMA_FROM_DEVICE
);
1169 dev_kfree_skb_any(rx_q
->rx_skbuff
[i
]);
1171 rx_q
->rx_skbuff
[i
] = NULL
;
1175 * stmmac_free_tx_buffer - free RX dma buffers
1176 * @priv: private structure
1177 * @queue: RX queue index
1180 static void stmmac_free_tx_buffer(struct stmmac_priv
*priv
, u32 queue
, int i
)
1182 struct stmmac_tx_queue
*tx_q
= &priv
->tx_queue
[queue
];
1184 if (tx_q
->tx_skbuff_dma
[i
].buf
) {
1185 if (tx_q
->tx_skbuff_dma
[i
].map_as_page
)
1186 dma_unmap_page(priv
->device
,
1187 tx_q
->tx_skbuff_dma
[i
].buf
,
1188 tx_q
->tx_skbuff_dma
[i
].len
,
1191 dma_unmap_single(priv
->device
,
1192 tx_q
->tx_skbuff_dma
[i
].buf
,
1193 tx_q
->tx_skbuff_dma
[i
].len
,
1197 if (tx_q
->tx_skbuff
[i
]) {
1198 dev_kfree_skb_any(tx_q
->tx_skbuff
[i
]);
1199 tx_q
->tx_skbuff
[i
] = NULL
;
1200 tx_q
->tx_skbuff_dma
[i
].buf
= 0;
1201 tx_q
->tx_skbuff_dma
[i
].map_as_page
= false;
1206 * init_dma_rx_desc_rings - init the RX descriptor rings
1207 * @dev: net device structure
1209 * Description: this function initializes the DMA RX descriptors
1210 * and allocates the socket buffers. It supports the chained and ring
1213 static int init_dma_rx_desc_rings(struct net_device
*dev
, gfp_t flags
)
1215 struct stmmac_priv
*priv
= netdev_priv(dev
);
1216 u32 rx_count
= priv
->plat
->rx_queues_to_use
;
1217 unsigned int bfsize
= 0;
1222 if (priv
->hw
->mode
->set_16kib_bfsize
)
1223 bfsize
= priv
->hw
->mode
->set_16kib_bfsize(dev
->mtu
);
1225 if (bfsize
< BUF_SIZE_16KiB
)
1226 bfsize
= stmmac_set_bfsize(dev
->mtu
, priv
->dma_buf_sz
);
1228 priv
->dma_buf_sz
= bfsize
;
1230 /* RX INITIALIZATION */
1231 netif_dbg(priv
, probe
, priv
->dev
,
1232 "SKB addresses:\nskb\t\tskb data\tdma data\n");
1234 for (queue
= 0; queue
< rx_count
; queue
++) {
1235 struct stmmac_rx_queue
*rx_q
= &priv
->rx_queue
[queue
];
1237 netif_dbg(priv
, probe
, priv
->dev
,
1238 "(%s) dma_rx_phy=0x%08x\n", __func__
,
1239 (u32
)rx_q
->dma_rx_phy
);
1241 for (i
= 0; i
< DMA_RX_SIZE
; i
++) {
1244 if (priv
->extend_desc
)
1245 p
= &((rx_q
->dma_erx
+ i
)->basic
);
1247 p
= rx_q
->dma_rx
+ i
;
1249 ret
= stmmac_init_rx_buffers(priv
, p
, i
, flags
,
1252 goto err_init_rx_buffers
;
1254 netif_dbg(priv
, probe
, priv
->dev
, "[%p]\t[%p]\t[%x]\n",
1255 rx_q
->rx_skbuff
[i
], rx_q
->rx_skbuff
[i
]->data
,
1256 (unsigned int)rx_q
->rx_skbuff_dma
[i
]);
1260 rx_q
->dirty_rx
= (unsigned int)(i
- DMA_RX_SIZE
);
1262 stmmac_clear_rx_descriptors(priv
, queue
);
1264 /* Setup the chained descriptor addresses */
1265 if (priv
->mode
== STMMAC_CHAIN_MODE
) {
1266 if (priv
->extend_desc
)
1267 priv
->hw
->mode
->init(rx_q
->dma_erx
,
1271 priv
->hw
->mode
->init(rx_q
->dma_rx
,
1281 err_init_rx_buffers
:
1282 while (queue
>= 0) {
1284 stmmac_free_rx_buffer(priv
, queue
, i
);
1297 * init_dma_tx_desc_rings - init the TX descriptor rings
1298 * @dev: net device structure.
1299 * Description: this function initializes the DMA TX descriptors
1300 * and allocates the socket buffers. It supports the chained and ring
1303 static int init_dma_tx_desc_rings(struct net_device
*dev
)
1305 struct stmmac_priv
*priv
= netdev_priv(dev
);
1306 u32 tx_queue_cnt
= priv
->plat
->tx_queues_to_use
;
1310 for (queue
= 0; queue
< tx_queue_cnt
; queue
++) {
1311 struct stmmac_tx_queue
*tx_q
= &priv
->tx_queue
[queue
];
1313 netif_dbg(priv
, probe
, priv
->dev
,
1314 "(%s) dma_tx_phy=0x%08x\n", __func__
,
1315 (u32
)tx_q
->dma_tx_phy
);
1317 /* Setup the chained descriptor addresses */
1318 if (priv
->mode
== STMMAC_CHAIN_MODE
) {
1319 if (priv
->extend_desc
)
1320 priv
->hw
->mode
->init(tx_q
->dma_etx
,
1324 priv
->hw
->mode
->init(tx_q
->dma_tx
,
1329 for (i
= 0; i
< DMA_TX_SIZE
; i
++) {
1331 if (priv
->extend_desc
)
1332 p
= &((tx_q
->dma_etx
+ i
)->basic
);
1334 p
= tx_q
->dma_tx
+ i
;
1336 if (priv
->synopsys_id
>= DWMAC_CORE_4_00
) {
1345 tx_q
->tx_skbuff_dma
[i
].buf
= 0;
1346 tx_q
->tx_skbuff_dma
[i
].map_as_page
= false;
1347 tx_q
->tx_skbuff_dma
[i
].len
= 0;
1348 tx_q
->tx_skbuff_dma
[i
].last_segment
= false;
1349 tx_q
->tx_skbuff
[i
] = NULL
;
1355 netdev_tx_reset_queue(netdev_get_tx_queue(priv
->dev
, queue
));
1362 * init_dma_desc_rings - init the RX/TX descriptor rings
1363 * @dev: net device structure
1365 * Description: this function initializes the DMA RX/TX descriptors
1366 * and allocates the socket buffers. It supports the chained and ring
1369 static int init_dma_desc_rings(struct net_device
*dev
, gfp_t flags
)
1371 struct stmmac_priv
*priv
= netdev_priv(dev
);
1374 ret
= init_dma_rx_desc_rings(dev
, flags
);
1378 ret
= init_dma_tx_desc_rings(dev
);
1380 stmmac_clear_descriptors(priv
);
1382 if (netif_msg_hw(priv
))
1383 stmmac_display_rings(priv
);
1389 * dma_free_rx_skbufs - free RX dma buffers
1390 * @priv: private structure
1391 * @queue: RX queue index
1393 static void dma_free_rx_skbufs(struct stmmac_priv
*priv
, u32 queue
)
1397 for (i
= 0; i
< DMA_RX_SIZE
; i
++)
1398 stmmac_free_rx_buffer(priv
, queue
, i
);
1402 * dma_free_tx_skbufs - free TX dma buffers
1403 * @priv: private structure
1404 * @queue: TX queue index
1406 static void dma_free_tx_skbufs(struct stmmac_priv
*priv
, u32 queue
)
1410 for (i
= 0; i
< DMA_TX_SIZE
; i
++)
1411 stmmac_free_tx_buffer(priv
, queue
, i
);
1415 * free_dma_rx_desc_resources - free RX dma desc resources
1416 * @priv: private structure
1418 static void free_dma_rx_desc_resources(struct stmmac_priv
*priv
)
1420 u32 rx_count
= priv
->plat
->rx_queues_to_use
;
1423 /* Free RX queue resources */
1424 for (queue
= 0; queue
< rx_count
; queue
++) {
1425 struct stmmac_rx_queue
*rx_q
= &priv
->rx_queue
[queue
];
1427 /* Release the DMA RX socket buffers */
1428 dma_free_rx_skbufs(priv
, queue
);
1430 /* Free DMA regions of consistent memory previously allocated */
1431 if (!priv
->extend_desc
)
1432 dma_free_coherent(priv
->device
,
1433 DMA_RX_SIZE
* sizeof(struct dma_desc
),
1434 rx_q
->dma_rx
, rx_q
->dma_rx_phy
);
1436 dma_free_coherent(priv
->device
, DMA_RX_SIZE
*
1437 sizeof(struct dma_extended_desc
),
1438 rx_q
->dma_erx
, rx_q
->dma_rx_phy
);
1440 kfree(rx_q
->rx_skbuff_dma
);
1441 kfree(rx_q
->rx_skbuff
);
1446 * free_dma_tx_desc_resources - free TX dma desc resources
1447 * @priv: private structure
1449 static void free_dma_tx_desc_resources(struct stmmac_priv
*priv
)
1451 u32 tx_count
= priv
->plat
->tx_queues_to_use
;
1454 /* Free TX queue resources */
1455 for (queue
= 0; queue
< tx_count
; queue
++) {
1456 struct stmmac_tx_queue
*tx_q
= &priv
->tx_queue
[queue
];
1458 /* Release the DMA TX socket buffers */
1459 dma_free_tx_skbufs(priv
, queue
);
1461 /* Free DMA regions of consistent memory previously allocated */
1462 if (!priv
->extend_desc
)
1463 dma_free_coherent(priv
->device
,
1464 DMA_TX_SIZE
* sizeof(struct dma_desc
),
1465 tx_q
->dma_tx
, tx_q
->dma_tx_phy
);
1467 dma_free_coherent(priv
->device
, DMA_TX_SIZE
*
1468 sizeof(struct dma_extended_desc
),
1469 tx_q
->dma_etx
, tx_q
->dma_tx_phy
);
1471 kfree(tx_q
->tx_skbuff_dma
);
1472 kfree(tx_q
->tx_skbuff
);
1477 * alloc_dma_rx_desc_resources - alloc RX resources.
1478 * @priv: private structure
1479 * Description: according to which descriptor can be used (extend or basic)
1480 * this function allocates the resources for TX and RX paths. In case of
1481 * reception, for example, it pre-allocated the RX socket buffer in order to
1482 * allow zero-copy mechanism.
1484 static int alloc_dma_rx_desc_resources(struct stmmac_priv
*priv
)
1486 u32 rx_count
= priv
->plat
->rx_queues_to_use
;
1490 /* RX queues buffers and DMA */
1491 for (queue
= 0; queue
< rx_count
; queue
++) {
1492 struct stmmac_rx_queue
*rx_q
= &priv
->rx_queue
[queue
];
1494 rx_q
->queue_index
= queue
;
1495 rx_q
->priv_data
= priv
;
1497 rx_q
->rx_skbuff_dma
= kmalloc_array(DMA_RX_SIZE
,
1500 if (!rx_q
->rx_skbuff_dma
)
1503 rx_q
->rx_skbuff
= kmalloc_array(DMA_RX_SIZE
,
1504 sizeof(struct sk_buff
*),
1506 if (!rx_q
->rx_skbuff
)
1509 if (priv
->extend_desc
) {
1510 rx_q
->dma_erx
= dma_zalloc_coherent(priv
->device
,
1520 rx_q
->dma_rx
= dma_zalloc_coherent(priv
->device
,
1534 free_dma_rx_desc_resources(priv
);
1540 * alloc_dma_tx_desc_resources - alloc TX resources.
1541 * @priv: private structure
1542 * Description: according to which descriptor can be used (extend or basic)
1543 * this function allocates the resources for TX and RX paths. In case of
1544 * reception, for example, it pre-allocated the RX socket buffer in order to
1545 * allow zero-copy mechanism.
1547 static int alloc_dma_tx_desc_resources(struct stmmac_priv
*priv
)
1549 u32 tx_count
= priv
->plat
->tx_queues_to_use
;
1553 /* TX queues buffers and DMA */
1554 for (queue
= 0; queue
< tx_count
; queue
++) {
1555 struct stmmac_tx_queue
*tx_q
= &priv
->tx_queue
[queue
];
1557 tx_q
->queue_index
= queue
;
1558 tx_q
->priv_data
= priv
;
1560 tx_q
->tx_skbuff_dma
= kmalloc_array(DMA_TX_SIZE
,
1561 sizeof(*tx_q
->tx_skbuff_dma
),
1563 if (!tx_q
->tx_skbuff_dma
)
1566 tx_q
->tx_skbuff
= kmalloc_array(DMA_TX_SIZE
,
1567 sizeof(struct sk_buff
*),
1569 if (!tx_q
->tx_skbuff
)
1572 if (priv
->extend_desc
) {
1573 tx_q
->dma_etx
= dma_zalloc_coherent(priv
->device
,
1582 tx_q
->dma_tx
= dma_zalloc_coherent(priv
->device
,
1596 free_dma_tx_desc_resources(priv
);
1602 * alloc_dma_desc_resources - alloc TX/RX resources.
1603 * @priv: private structure
1604 * Description: according to which descriptor can be used (extend or basic)
1605 * this function allocates the resources for TX and RX paths. In case of
1606 * reception, for example, it pre-allocated the RX socket buffer in order to
1607 * allow zero-copy mechanism.
1609 static int alloc_dma_desc_resources(struct stmmac_priv
*priv
)
1612 int ret
= alloc_dma_rx_desc_resources(priv
);
1617 ret
= alloc_dma_tx_desc_resources(priv
);
1623 * free_dma_desc_resources - free dma desc resources
1624 * @priv: private structure
1626 static void free_dma_desc_resources(struct stmmac_priv
*priv
)
1628 /* Release the DMA RX socket buffers */
1629 free_dma_rx_desc_resources(priv
);
1631 /* Release the DMA TX socket buffers */
1632 free_dma_tx_desc_resources(priv
);
1636 * stmmac_mac_enable_rx_queues - Enable MAC rx queues
1637 * @priv: driver private structure
1638 * Description: It is used for enabling the rx queues in the MAC
1640 static void stmmac_mac_enable_rx_queues(struct stmmac_priv
*priv
)
1642 u32 rx_queues_count
= priv
->plat
->rx_queues_to_use
;
1646 for (queue
= 0; queue
< rx_queues_count
; queue
++) {
1647 mode
= priv
->plat
->rx_queues_cfg
[queue
].mode_to_use
;
1648 priv
->hw
->mac
->rx_queue_enable(priv
->hw
, mode
, queue
);
1653 * stmmac_start_rx_dma - start RX DMA channel
1654 * @priv: driver private structure
1655 * @chan: RX channel index
1657 * This starts a RX DMA channel
1659 static void stmmac_start_rx_dma(struct stmmac_priv
*priv
, u32 chan
)
1661 netdev_dbg(priv
->dev
, "DMA RX processes started in channel %d\n", chan
);
1662 priv
->hw
->dma
->start_rx(priv
->ioaddr
, chan
);
1666 * stmmac_start_tx_dma - start TX DMA channel
1667 * @priv: driver private structure
1668 * @chan: TX channel index
1670 * This starts a TX DMA channel
1672 static void stmmac_start_tx_dma(struct stmmac_priv
*priv
, u32 chan
)
1674 netdev_dbg(priv
->dev
, "DMA TX processes started in channel %d\n", chan
);
1675 priv
->hw
->dma
->start_tx(priv
->ioaddr
, chan
);
1679 * stmmac_stop_rx_dma - stop RX DMA channel
1680 * @priv: driver private structure
1681 * @chan: RX channel index
1683 * This stops a RX DMA channel
1685 static void stmmac_stop_rx_dma(struct stmmac_priv
*priv
, u32 chan
)
1687 netdev_dbg(priv
->dev
, "DMA RX processes stopped in channel %d\n", chan
);
1688 priv
->hw
->dma
->stop_rx(priv
->ioaddr
, chan
);
1692 * stmmac_stop_tx_dma - stop TX DMA channel
1693 * @priv: driver private structure
1694 * @chan: TX channel index
1696 * This stops a TX DMA channel
1698 static void stmmac_stop_tx_dma(struct stmmac_priv
*priv
, u32 chan
)
1700 netdev_dbg(priv
->dev
, "DMA TX processes stopped in channel %d\n", chan
);
1701 priv
->hw
->dma
->stop_tx(priv
->ioaddr
, chan
);
1705 * stmmac_start_all_dma - start all RX and TX DMA channels
1706 * @priv: driver private structure
1708 * This starts all the RX and TX DMA channels
1710 static void stmmac_start_all_dma(struct stmmac_priv
*priv
)
1712 u32 rx_channels_count
= priv
->plat
->rx_queues_to_use
;
1713 u32 tx_channels_count
= priv
->plat
->tx_queues_to_use
;
1716 for (chan
= 0; chan
< rx_channels_count
; chan
++)
1717 stmmac_start_rx_dma(priv
, chan
);
1719 for (chan
= 0; chan
< tx_channels_count
; chan
++)
1720 stmmac_start_tx_dma(priv
, chan
);
1724 * stmmac_stop_all_dma - stop all RX and TX DMA channels
1725 * @priv: driver private structure
1727 * This stops the RX and TX DMA channels
1729 static void stmmac_stop_all_dma(struct stmmac_priv
*priv
)
1731 u32 rx_channels_count
= priv
->plat
->rx_queues_to_use
;
1732 u32 tx_channels_count
= priv
->plat
->tx_queues_to_use
;
1735 for (chan
= 0; chan
< rx_channels_count
; chan
++)
1736 stmmac_stop_rx_dma(priv
, chan
);
1738 for (chan
= 0; chan
< tx_channels_count
; chan
++)
1739 stmmac_stop_tx_dma(priv
, chan
);
1743 * stmmac_dma_operation_mode - HW DMA operation mode
1744 * @priv: driver private structure
1745 * Description: it is used for configuring the DMA operation mode register in
1746 * order to program the tx/rx DMA thresholds or Store-And-Forward mode.
1748 static void stmmac_dma_operation_mode(struct stmmac_priv
*priv
)
1750 u32 rx_channels_count
= priv
->plat
->rx_queues_to_use
;
1751 u32 tx_channels_count
= priv
->plat
->tx_queues_to_use
;
1752 int rxfifosz
= priv
->plat
->rx_fifo_size
;
1758 rxfifosz
= priv
->dma_cap
.rx_fifo_size
;
1760 if (priv
->plat
->force_thresh_dma_mode
) {
1763 } else if (priv
->plat
->force_sf_dma_mode
|| priv
->plat
->tx_coe
) {
1765 * In case of GMAC, SF mode can be enabled
1766 * to perform the TX COE in HW. This depends on:
1767 * 1) TX COE if actually supported
1768 * 2) There is no bugged Jumbo frame support
1769 * that needs to not insert csum in the TDES.
1771 txmode
= SF_DMA_MODE
;
1772 rxmode
= SF_DMA_MODE
;
1773 priv
->xstats
.threshold
= SF_DMA_MODE
;
1776 rxmode
= SF_DMA_MODE
;
1779 /* configure all channels */
1780 if (priv
->synopsys_id
>= DWMAC_CORE_4_00
) {
1781 for (chan
= 0; chan
< rx_channels_count
; chan
++)
1782 priv
->hw
->dma
->dma_rx_mode(priv
->ioaddr
, rxmode
, chan
,
1785 for (chan
= 0; chan
< tx_channels_count
; chan
++)
1786 priv
->hw
->dma
->dma_tx_mode(priv
->ioaddr
, txmode
, chan
);
1788 priv
->hw
->dma
->dma_mode(priv
->ioaddr
, txmode
, rxmode
,
1794 * stmmac_tx_clean - to manage the transmission completion
1795 * @priv: driver private structure
1796 * @queue: TX queue index
1797 * Description: it reclaims the transmit resources after transmission completes.
1799 static void stmmac_tx_clean(struct stmmac_priv
*priv
, u32 queue
)
1801 struct stmmac_tx_queue
*tx_q
= &priv
->tx_queue
[queue
];
1802 unsigned int bytes_compl
= 0, pkts_compl
= 0;
1803 unsigned int entry
= tx_q
->dirty_tx
;
1805 netif_tx_lock(priv
->dev
);
1807 priv
->xstats
.tx_clean
++;
1809 while (entry
!= tx_q
->cur_tx
) {
1810 struct sk_buff
*skb
= tx_q
->tx_skbuff
[entry
];
1814 if (priv
->extend_desc
)
1815 p
= (struct dma_desc
*)(tx_q
->dma_etx
+ entry
);
1817 p
= tx_q
->dma_tx
+ entry
;
1819 status
= priv
->hw
->desc
->tx_status(&priv
->dev
->stats
,
1822 /* Check if the descriptor is owned by the DMA */
1823 if (unlikely(status
& tx_dma_own
))
1826 /* Just consider the last segment and ...*/
1827 if (likely(!(status
& tx_not_ls
))) {
1828 /* ... verify the status error condition */
1829 if (unlikely(status
& tx_err
)) {
1830 priv
->dev
->stats
.tx_errors
++;
1832 priv
->dev
->stats
.tx_packets
++;
1833 priv
->xstats
.tx_pkt_n
++;
1835 stmmac_get_tx_hwtstamp(priv
, p
, skb
);
1838 if (likely(tx_q
->tx_skbuff_dma
[entry
].buf
)) {
1839 if (tx_q
->tx_skbuff_dma
[entry
].map_as_page
)
1840 dma_unmap_page(priv
->device
,
1841 tx_q
->tx_skbuff_dma
[entry
].buf
,
1842 tx_q
->tx_skbuff_dma
[entry
].len
,
1845 dma_unmap_single(priv
->device
,
1846 tx_q
->tx_skbuff_dma
[entry
].buf
,
1847 tx_q
->tx_skbuff_dma
[entry
].len
,
1849 tx_q
->tx_skbuff_dma
[entry
].buf
= 0;
1850 tx_q
->tx_skbuff_dma
[entry
].len
= 0;
1851 tx_q
->tx_skbuff_dma
[entry
].map_as_page
= false;
1854 if (priv
->hw
->mode
->clean_desc3
)
1855 priv
->hw
->mode
->clean_desc3(tx_q
, p
);
1857 tx_q
->tx_skbuff_dma
[entry
].last_segment
= false;
1858 tx_q
->tx_skbuff_dma
[entry
].is_jumbo
= false;
1860 if (likely(skb
!= NULL
)) {
1862 bytes_compl
+= skb
->len
;
1863 dev_consume_skb_any(skb
);
1864 tx_q
->tx_skbuff
[entry
] = NULL
;
1867 priv
->hw
->desc
->release_tx_desc(p
, priv
->mode
);
1869 entry
= STMMAC_GET_ENTRY(entry
, DMA_TX_SIZE
);
1871 tx_q
->dirty_tx
= entry
;
1873 netdev_tx_completed_queue(netdev_get_tx_queue(priv
->dev
, queue
),
1874 pkts_compl
, bytes_compl
);
1876 if (unlikely(netif_tx_queue_stopped(netdev_get_tx_queue(priv
->dev
,
1878 stmmac_tx_avail(priv
, queue
) > STMMAC_TX_THRESH
) {
1880 netif_dbg(priv
, tx_done
, priv
->dev
,
1881 "%s: restart transmit\n", __func__
);
1882 netif_tx_wake_queue(netdev_get_tx_queue(priv
->dev
, queue
));
1885 if ((priv
->eee_enabled
) && (!priv
->tx_path_in_lpi_mode
)) {
1886 stmmac_enable_eee_mode(priv
);
1887 mod_timer(&priv
->eee_ctrl_timer
, STMMAC_LPI_T(eee_timer
));
1889 netif_tx_unlock(priv
->dev
);
1892 static inline void stmmac_enable_dma_irq(struct stmmac_priv
*priv
, u32 chan
)
1894 priv
->hw
->dma
->enable_dma_irq(priv
->ioaddr
, chan
);
1897 static inline void stmmac_disable_dma_irq(struct stmmac_priv
*priv
, u32 chan
)
1899 priv
->hw
->dma
->disable_dma_irq(priv
->ioaddr
, chan
);
1903 * stmmac_tx_err - to manage the tx error
1904 * @priv: driver private structure
1905 * @chan: channel index
1906 * Description: it cleans the descriptors and restarts the transmission
1907 * in case of transmission errors.
1909 static void stmmac_tx_err(struct stmmac_priv
*priv
, u32 chan
)
1911 struct stmmac_tx_queue
*tx_q
= &priv
->tx_queue
[chan
];
1914 netif_tx_stop_queue(netdev_get_tx_queue(priv
->dev
, chan
));
1916 stmmac_stop_tx_dma(priv
, chan
);
1917 dma_free_tx_skbufs(priv
, chan
);
1918 for (i
= 0; i
< DMA_TX_SIZE
; i
++)
1919 if (priv
->extend_desc
)
1920 priv
->hw
->desc
->init_tx_desc(&tx_q
->dma_etx
[i
].basic
,
1922 (i
== DMA_TX_SIZE
- 1));
1924 priv
->hw
->desc
->init_tx_desc(&tx_q
->dma_tx
[i
],
1926 (i
== DMA_TX_SIZE
- 1));
1929 netdev_tx_reset_queue(netdev_get_tx_queue(priv
->dev
, chan
));
1930 stmmac_start_tx_dma(priv
, chan
);
1932 priv
->dev
->stats
.tx_errors
++;
1933 netif_tx_wake_queue(netdev_get_tx_queue(priv
->dev
, chan
));
1937 * stmmac_set_dma_operation_mode - Set DMA operation mode by channel
1938 * @priv: driver private structure
1939 * @txmode: TX operating mode
1940 * @rxmode: RX operating mode
1941 * @chan: channel index
1942 * Description: it is used for configuring of the DMA operation mode in
1943 * runtime in order to program the tx/rx DMA thresholds or Store-And-Forward
1946 static void stmmac_set_dma_operation_mode(struct stmmac_priv
*priv
, u32 txmode
,
1947 u32 rxmode
, u32 chan
)
1949 int rxfifosz
= priv
->plat
->rx_fifo_size
;
1952 rxfifosz
= priv
->dma_cap
.rx_fifo_size
;
1954 if (priv
->synopsys_id
>= DWMAC_CORE_4_00
) {
1955 priv
->hw
->dma
->dma_rx_mode(priv
->ioaddr
, rxmode
, chan
,
1957 priv
->hw
->dma
->dma_tx_mode(priv
->ioaddr
, txmode
, chan
);
1959 priv
->hw
->dma
->dma_mode(priv
->ioaddr
, txmode
, rxmode
,
1965 * stmmac_dma_interrupt - DMA ISR
1966 * @priv: driver private structure
1967 * Description: this is the DMA ISR. It is called by the main ISR.
1968 * It calls the dwmac dma routine and schedule poll method in case of some
1971 static void stmmac_dma_interrupt(struct stmmac_priv
*priv
)
1973 u32 tx_channel_count
= priv
->plat
->tx_queues_to_use
;
1977 for (chan
= 0; chan
< tx_channel_count
; chan
++) {
1978 struct stmmac_rx_queue
*rx_q
= &priv
->rx_queue
[chan
];
1980 status
= priv
->hw
->dma
->dma_interrupt(priv
->ioaddr
,
1981 &priv
->xstats
, chan
);
1982 if (likely((status
& handle_rx
)) || (status
& handle_tx
)) {
1983 if (likely(napi_schedule_prep(&rx_q
->napi
))) {
1984 stmmac_disable_dma_irq(priv
, chan
);
1985 __napi_schedule(&rx_q
->napi
);
1989 if (unlikely(status
& tx_hard_error_bump_tc
)) {
1990 /* Try to bump up the dma threshold on this failure */
1991 if (unlikely(priv
->xstats
.threshold
!= SF_DMA_MODE
) &&
1994 if (priv
->plat
->force_thresh_dma_mode
)
1995 stmmac_set_dma_operation_mode(priv
,
2000 stmmac_set_dma_operation_mode(priv
,
2004 priv
->xstats
.threshold
= tc
;
2006 } else if (unlikely(status
== tx_hard_error
)) {
2007 stmmac_tx_err(priv
, chan
);
2013 * stmmac_mmc_setup: setup the Mac Management Counters (MMC)
2014 * @priv: driver private structure
2015 * Description: this masks the MMC irq, in fact, the counters are managed in SW.
2017 static void stmmac_mmc_setup(struct stmmac_priv
*priv
)
2019 unsigned int mode
= MMC_CNTRL_RESET_ON_READ
| MMC_CNTRL_COUNTER_RESET
|
2020 MMC_CNTRL_PRESET
| MMC_CNTRL_FULL_HALF_PRESET
;
2022 if (priv
->synopsys_id
>= DWMAC_CORE_4_00
) {
2023 priv
->ptpaddr
= priv
->ioaddr
+ PTP_GMAC4_OFFSET
;
2024 priv
->mmcaddr
= priv
->ioaddr
+ MMC_GMAC4_OFFSET
;
2026 priv
->ptpaddr
= priv
->ioaddr
+ PTP_GMAC3_X_OFFSET
;
2027 priv
->mmcaddr
= priv
->ioaddr
+ MMC_GMAC3_X_OFFSET
;
2030 dwmac_mmc_intr_all_mask(priv
->mmcaddr
);
2032 if (priv
->dma_cap
.rmon
) {
2033 dwmac_mmc_ctrl(priv
->mmcaddr
, mode
);
2034 memset(&priv
->mmc
, 0, sizeof(struct stmmac_counters
));
2036 netdev_info(priv
->dev
, "No MAC Management Counters available\n");
2040 * stmmac_selec_desc_mode - to select among: normal/alternate/extend descriptors
2041 * @priv: driver private structure
2042 * Description: select the Enhanced/Alternate or Normal descriptors.
2043 * In case of Enhanced/Alternate, it checks if the extended descriptors are
2044 * supported by the HW capability register.
2046 static void stmmac_selec_desc_mode(struct stmmac_priv
*priv
)
2048 if (priv
->plat
->enh_desc
) {
2049 dev_info(priv
->device
, "Enhanced/Alternate descriptors\n");
2051 /* GMAC older than 3.50 has no extended descriptors */
2052 if (priv
->synopsys_id
>= DWMAC_CORE_3_50
) {
2053 dev_info(priv
->device
, "Enabled extended descriptors\n");
2054 priv
->extend_desc
= 1;
2056 dev_warn(priv
->device
, "Extended descriptors not supported\n");
2058 priv
->hw
->desc
= &enh_desc_ops
;
2060 dev_info(priv
->device
, "Normal descriptors\n");
2061 priv
->hw
->desc
= &ndesc_ops
;
2066 * stmmac_get_hw_features - get MAC capabilities from the HW cap. register.
2067 * @priv: driver private structure
2069 * new GMAC chip generations have a new register to indicate the
2070 * presence of the optional feature/functions.
2071 * This can be also used to override the value passed through the
2072 * platform and necessary for old MAC10/100 and GMAC chips.
2074 static int stmmac_get_hw_features(struct stmmac_priv
*priv
)
2078 if (priv
->hw
->dma
->get_hw_feature
) {
2079 priv
->hw
->dma
->get_hw_feature(priv
->ioaddr
,
2088 * stmmac_check_ether_addr - check if the MAC addr is valid
2089 * @priv: driver private structure
2091 * it is to verify if the MAC address is valid, in case of failures it
2092 * generates a random MAC address
2094 static void stmmac_check_ether_addr(struct stmmac_priv
*priv
)
2096 if (!is_valid_ether_addr(priv
->dev
->dev_addr
)) {
2097 priv
->hw
->mac
->get_umac_addr(priv
->hw
,
2098 priv
->dev
->dev_addr
, 0);
2099 if (!is_valid_ether_addr(priv
->dev
->dev_addr
))
2100 eth_hw_addr_random(priv
->dev
);
2101 netdev_info(priv
->dev
, "device MAC address %pM\n",
2102 priv
->dev
->dev_addr
);
2107 * stmmac_init_dma_engine - DMA init.
2108 * @priv: driver private structure
2110 * It inits the DMA invoking the specific MAC/GMAC callback.
2111 * Some DMA parameters can be passed from the platform;
2112 * in case of these are not passed a default is kept for the MAC or GMAC.
2114 static int stmmac_init_dma_engine(struct stmmac_priv
*priv
)
2116 u32 rx_channels_count
= priv
->plat
->rx_queues_to_use
;
2117 u32 tx_channels_count
= priv
->plat
->tx_queues_to_use
;
2118 struct stmmac_rx_queue
*rx_q
;
2119 struct stmmac_tx_queue
*tx_q
;
2120 u32 dummy_dma_rx_phy
= 0;
2121 u32 dummy_dma_tx_phy
= 0;
2126 if (!priv
->plat
->dma_cfg
|| !priv
->plat
->dma_cfg
->pbl
) {
2127 dev_err(priv
->device
, "Invalid DMA configuration\n");
2131 if (priv
->extend_desc
&& (priv
->mode
== STMMAC_RING_MODE
))
2134 ret
= priv
->hw
->dma
->reset(priv
->ioaddr
);
2136 dev_err(priv
->device
, "Failed to reset the dma\n");
2140 if (priv
->synopsys_id
>= DWMAC_CORE_4_00
) {
2141 /* DMA Configuration */
2142 priv
->hw
->dma
->init(priv
->ioaddr
, priv
->plat
->dma_cfg
,
2143 dummy_dma_tx_phy
, dummy_dma_rx_phy
, atds
);
2145 /* DMA RX Channel Configuration */
2146 for (chan
= 0; chan
< rx_channels_count
; chan
++) {
2147 rx_q
= &priv
->rx_queue
[chan
];
2149 priv
->hw
->dma
->init_rx_chan(priv
->ioaddr
,
2150 priv
->plat
->dma_cfg
,
2151 rx_q
->dma_rx_phy
, chan
);
2153 rx_q
->rx_tail_addr
= rx_q
->dma_rx_phy
+
2154 (DMA_RX_SIZE
* sizeof(struct dma_desc
));
2155 priv
->hw
->dma
->set_rx_tail_ptr(priv
->ioaddr
,
2160 /* DMA TX Channel Configuration */
2161 for (chan
= 0; chan
< tx_channels_count
; chan
++) {
2162 tx_q
= &priv
->tx_queue
[chan
];
2164 priv
->hw
->dma
->init_chan(priv
->ioaddr
,
2165 priv
->plat
->dma_cfg
,
2168 priv
->hw
->dma
->init_tx_chan(priv
->ioaddr
,
2169 priv
->plat
->dma_cfg
,
2170 tx_q
->dma_tx_phy
, chan
);
2172 tx_q
->tx_tail_addr
= tx_q
->dma_tx_phy
+
2173 (DMA_TX_SIZE
* sizeof(struct dma_desc
));
2174 priv
->hw
->dma
->set_tx_tail_ptr(priv
->ioaddr
,
2179 rx_q
= &priv
->rx_queue
[chan
];
2180 tx_q
= &priv
->tx_queue
[chan
];
2181 priv
->hw
->dma
->init(priv
->ioaddr
, priv
->plat
->dma_cfg
,
2182 tx_q
->dma_tx_phy
, rx_q
->dma_rx_phy
, atds
);
2185 if (priv
->plat
->axi
&& priv
->hw
->dma
->axi
)
2186 priv
->hw
->dma
->axi(priv
->ioaddr
, priv
->plat
->axi
);
2192 * stmmac_tx_timer - mitigation sw timer for tx.
2193 * @data: data pointer
2195 * This is the timer handler to directly invoke the stmmac_tx_clean.
2197 static void stmmac_tx_timer(unsigned long data
)
2199 struct stmmac_priv
*priv
= (struct stmmac_priv
*)data
;
2200 u32 tx_queues_count
= priv
->plat
->tx_queues_to_use
;
2203 /* let's scan all the tx queues */
2204 for (queue
= 0; queue
< tx_queues_count
; queue
++)
2205 stmmac_tx_clean(priv
, queue
);
2209 * stmmac_init_tx_coalesce - init tx mitigation options.
2210 * @priv: driver private structure
2212 * This inits the transmit coalesce parameters: i.e. timer rate,
2213 * timer handler and default threshold used for enabling the
2214 * interrupt on completion bit.
2216 static void stmmac_init_tx_coalesce(struct stmmac_priv
*priv
)
2218 priv
->tx_coal_frames
= STMMAC_TX_FRAMES
;
2219 priv
->tx_coal_timer
= STMMAC_COAL_TX_TIMER
;
2220 init_timer(&priv
->txtimer
);
2221 priv
->txtimer
.expires
= STMMAC_COAL_TIMER(priv
->tx_coal_timer
);
2222 priv
->txtimer
.data
= (unsigned long)priv
;
2223 priv
->txtimer
.function
= stmmac_tx_timer
;
2224 add_timer(&priv
->txtimer
);
2227 static void stmmac_set_rings_length(struct stmmac_priv
*priv
)
2229 u32 rx_channels_count
= priv
->plat
->rx_queues_to_use
;
2230 u32 tx_channels_count
= priv
->plat
->tx_queues_to_use
;
2233 /* set TX ring length */
2234 if (priv
->hw
->dma
->set_tx_ring_len
) {
2235 for (chan
= 0; chan
< tx_channels_count
; chan
++)
2236 priv
->hw
->dma
->set_tx_ring_len(priv
->ioaddr
,
2237 (DMA_TX_SIZE
- 1), chan
);
2240 /* set RX ring length */
2241 if (priv
->hw
->dma
->set_rx_ring_len
) {
2242 for (chan
= 0; chan
< rx_channels_count
; chan
++)
2243 priv
->hw
->dma
->set_rx_ring_len(priv
->ioaddr
,
2244 (DMA_RX_SIZE
- 1), chan
);
2249 * stmmac_set_tx_queue_weight - Set TX queue weight
2250 * @priv: driver private structure
2251 * Description: It is used for setting TX queues weight
2253 static void stmmac_set_tx_queue_weight(struct stmmac_priv
*priv
)
2255 u32 tx_queues_count
= priv
->plat
->tx_queues_to_use
;
2259 for (queue
= 0; queue
< tx_queues_count
; queue
++) {
2260 weight
= priv
->plat
->tx_queues_cfg
[queue
].weight
;
2261 priv
->hw
->mac
->set_mtl_tx_queue_weight(priv
->hw
, weight
, queue
);
2266 * stmmac_configure_cbs - Configure CBS in TX queue
2267 * @priv: driver private structure
2268 * Description: It is used for configuring CBS in AVB TX queues
2270 static void stmmac_configure_cbs(struct stmmac_priv
*priv
)
2272 u32 tx_queues_count
= priv
->plat
->tx_queues_to_use
;
2276 /* queue 0 is reserved for legacy traffic */
2277 for (queue
= 1; queue
< tx_queues_count
; queue
++) {
2278 mode_to_use
= priv
->plat
->tx_queues_cfg
[queue
].mode_to_use
;
2279 if (mode_to_use
== MTL_QUEUE_DCB
)
2282 priv
->hw
->mac
->config_cbs(priv
->hw
,
2283 priv
->plat
->tx_queues_cfg
[queue
].send_slope
,
2284 priv
->plat
->tx_queues_cfg
[queue
].idle_slope
,
2285 priv
->plat
->tx_queues_cfg
[queue
].high_credit
,
2286 priv
->plat
->tx_queues_cfg
[queue
].low_credit
,
2292 * stmmac_rx_queue_dma_chan_map - Map RX queue to RX dma channel
2293 * @priv: driver private structure
2294 * Description: It is used for mapping RX queues to RX dma channels
2296 static void stmmac_rx_queue_dma_chan_map(struct stmmac_priv
*priv
)
2298 u32 rx_queues_count
= priv
->plat
->rx_queues_to_use
;
2302 for (queue
= 0; queue
< rx_queues_count
; queue
++) {
2303 chan
= priv
->plat
->rx_queues_cfg
[queue
].chan
;
2304 priv
->hw
->mac
->map_mtl_to_dma(priv
->hw
, queue
, chan
);
2309 * stmmac_mac_config_rx_queues_prio - Configure RX Queue priority
2310 * @priv: driver private structure
2311 * Description: It is used for configuring the RX Queue Priority
2313 static void stmmac_mac_config_rx_queues_prio(struct stmmac_priv
*priv
)
2315 u32 rx_queues_count
= priv
->plat
->rx_queues_to_use
;
2319 for (queue
= 0; queue
< rx_queues_count
; queue
++) {
2320 if (!priv
->plat
->rx_queues_cfg
[queue
].use_prio
)
2323 prio
= priv
->plat
->rx_queues_cfg
[queue
].prio
;
2324 priv
->hw
->mac
->rx_queue_prio(priv
->hw
, prio
, queue
);
2329 * stmmac_mac_config_tx_queues_prio - Configure TX Queue priority
2330 * @priv: driver private structure
2331 * Description: It is used for configuring the TX Queue Priority
2333 static void stmmac_mac_config_tx_queues_prio(struct stmmac_priv
*priv
)
2335 u32 tx_queues_count
= priv
->plat
->tx_queues_to_use
;
2339 for (queue
= 0; queue
< tx_queues_count
; queue
++) {
2340 if (!priv
->plat
->tx_queues_cfg
[queue
].use_prio
)
2343 prio
= priv
->plat
->tx_queues_cfg
[queue
].prio
;
2344 priv
->hw
->mac
->tx_queue_prio(priv
->hw
, prio
, queue
);
2349 * stmmac_mac_config_rx_queues_routing - Configure RX Queue Routing
2350 * @priv: driver private structure
2351 * Description: It is used for configuring the RX queue routing
2353 static void stmmac_mac_config_rx_queues_routing(struct stmmac_priv
*priv
)
2355 u32 rx_queues_count
= priv
->plat
->rx_queues_to_use
;
2359 for (queue
= 0; queue
< rx_queues_count
; queue
++) {
2360 /* no specific packet type routing specified for the queue */
2361 if (priv
->plat
->rx_queues_cfg
[queue
].pkt_route
== 0x0)
2364 packet
= priv
->plat
->rx_queues_cfg
[queue
].pkt_route
;
2365 priv
->hw
->mac
->rx_queue_prio(priv
->hw
, packet
, queue
);
2370 * stmmac_mtl_configuration - Configure MTL
2371 * @priv: driver private structure
2372 * Description: It is used for configurring MTL
2374 static void stmmac_mtl_configuration(struct stmmac_priv
*priv
)
2376 u32 rx_queues_count
= priv
->plat
->rx_queues_to_use
;
2377 u32 tx_queues_count
= priv
->plat
->tx_queues_to_use
;
2379 if (tx_queues_count
> 1 && priv
->hw
->mac
->set_mtl_tx_queue_weight
)
2380 stmmac_set_tx_queue_weight(priv
);
2382 /* Configure MTL RX algorithms */
2383 if (rx_queues_count
> 1 && priv
->hw
->mac
->prog_mtl_rx_algorithms
)
2384 priv
->hw
->mac
->prog_mtl_rx_algorithms(priv
->hw
,
2385 priv
->plat
->rx_sched_algorithm
);
2387 /* Configure MTL TX algorithms */
2388 if (tx_queues_count
> 1 && priv
->hw
->mac
->prog_mtl_tx_algorithms
)
2389 priv
->hw
->mac
->prog_mtl_tx_algorithms(priv
->hw
,
2390 priv
->plat
->tx_sched_algorithm
);
2392 /* Configure CBS in AVB TX queues */
2393 if (tx_queues_count
> 1 && priv
->hw
->mac
->config_cbs
)
2394 stmmac_configure_cbs(priv
);
2396 /* Map RX MTL to DMA channels */
2397 if (priv
->hw
->mac
->map_mtl_to_dma
)
2398 stmmac_rx_queue_dma_chan_map(priv
);
2400 /* Enable MAC RX Queues */
2401 if (priv
->hw
->mac
->rx_queue_enable
)
2402 stmmac_mac_enable_rx_queues(priv
);
2404 /* Set RX priorities */
2405 if (rx_queues_count
> 1 && priv
->hw
->mac
->rx_queue_prio
)
2406 stmmac_mac_config_rx_queues_prio(priv
);
2408 /* Set TX priorities */
2409 if (tx_queues_count
> 1 && priv
->hw
->mac
->tx_queue_prio
)
2410 stmmac_mac_config_tx_queues_prio(priv
);
2412 /* Set RX routing */
2413 if (rx_queues_count
> 1 && priv
->hw
->mac
->rx_queue_routing
)
2414 stmmac_mac_config_rx_queues_routing(priv
);
2418 * stmmac_hw_setup - setup mac in a usable state.
2419 * @dev : pointer to the device structure.
2421 * this is the main function to setup the HW in a usable state because the
2422 * dma engine is reset, the core registers are configured (e.g. AXI,
2423 * Checksum features, timers). The DMA is ready to start receiving and
2426 * 0 on success and an appropriate (-)ve integer as defined in errno.h
2429 static int stmmac_hw_setup(struct net_device
*dev
, bool init_ptp
)
2431 struct stmmac_priv
*priv
= netdev_priv(dev
);
2432 u32 rx_cnt
= priv
->plat
->rx_queues_to_use
;
2433 u32 tx_cnt
= priv
->plat
->tx_queues_to_use
;
2437 /* DMA initialization and SW reset */
2438 ret
= stmmac_init_dma_engine(priv
);
2440 netdev_err(priv
->dev
, "%s: DMA engine initialization failed\n",
2445 /* Copy the MAC addr into the HW */
2446 priv
->hw
->mac
->set_umac_addr(priv
->hw
, dev
->dev_addr
, 0);
2448 /* PS and related bits will be programmed according to the speed */
2449 if (priv
->hw
->pcs
) {
2450 int speed
= priv
->plat
->mac_port_sel_speed
;
2452 if ((speed
== SPEED_10
) || (speed
== SPEED_100
) ||
2453 (speed
== SPEED_1000
)) {
2454 priv
->hw
->ps
= speed
;
2456 dev_warn(priv
->device
, "invalid port speed\n");
2461 /* Initialize the MAC Core */
2462 priv
->hw
->mac
->core_init(priv
->hw
, dev
->mtu
);
2465 if (priv
->synopsys_id
>= DWMAC_CORE_4_00
)
2466 stmmac_mtl_configuration(priv
);
2468 ret
= priv
->hw
->mac
->rx_ipc(priv
->hw
);
2470 netdev_warn(priv
->dev
, "RX IPC Checksum Offload disabled\n");
2471 priv
->plat
->rx_coe
= STMMAC_RX_COE_NONE
;
2472 priv
->hw
->rx_csum
= 0;
2475 /* Enable the MAC Rx/Tx */
2476 priv
->hw
->mac
->set_mac(priv
->ioaddr
, true);
2478 /* Set the HW DMA mode and the COE */
2479 stmmac_dma_operation_mode(priv
);
2481 stmmac_mmc_setup(priv
);
2484 ret
= clk_prepare_enable(priv
->plat
->clk_ptp_ref
);
2486 netdev_warn(priv
->dev
, "failed to enable PTP reference clock: %d\n", ret
);
2488 ret
= stmmac_init_ptp(priv
);
2489 if (ret
== -EOPNOTSUPP
)
2490 netdev_warn(priv
->dev
, "PTP not supported by HW\n");
2492 netdev_warn(priv
->dev
, "PTP init failed\n");
2495 #ifdef CONFIG_DEBUG_FS
2496 ret
= stmmac_init_fs(dev
);
2498 netdev_warn(priv
->dev
, "%s: failed debugFS registration\n",
2501 /* Start the ball rolling... */
2502 stmmac_start_all_dma(priv
);
2504 priv
->tx_lpi_timer
= STMMAC_DEFAULT_TWT_LS
;
2506 if ((priv
->use_riwt
) && (priv
->hw
->dma
->rx_watchdog
)) {
2507 priv
->rx_riwt
= MAX_DMA_RIWT
;
2508 priv
->hw
->dma
->rx_watchdog(priv
->ioaddr
, MAX_DMA_RIWT
, rx_cnt
);
2511 if (priv
->hw
->pcs
&& priv
->hw
->mac
->pcs_ctrl_ane
)
2512 priv
->hw
->mac
->pcs_ctrl_ane(priv
->hw
, 1, priv
->hw
->ps
, 0);
2514 /* set TX and RX rings length */
2515 stmmac_set_rings_length(priv
);
2519 for (chan
= 0; chan
< tx_cnt
; chan
++)
2520 priv
->hw
->dma
->enable_tso(priv
->ioaddr
, 1, chan
);
2526 static void stmmac_hw_teardown(struct net_device
*dev
)
2528 struct stmmac_priv
*priv
= netdev_priv(dev
);
2530 clk_disable_unprepare(priv
->plat
->clk_ptp_ref
);
2534 * stmmac_open - open entry point of the driver
2535 * @dev : pointer to the device structure.
2537 * This function is the open entry point of the driver.
2539 * 0 on success and an appropriate (-)ve integer as defined in errno.h
2542 static int stmmac_open(struct net_device
*dev
)
2544 struct stmmac_priv
*priv
= netdev_priv(dev
);
2547 stmmac_check_ether_addr(priv
);
2549 if (priv
->hw
->pcs
!= STMMAC_PCS_RGMII
&&
2550 priv
->hw
->pcs
!= STMMAC_PCS_TBI
&&
2551 priv
->hw
->pcs
!= STMMAC_PCS_RTBI
) {
2552 ret
= stmmac_init_phy(dev
);
2554 netdev_err(priv
->dev
,
2555 "%s: Cannot attach to PHY (error: %d)\n",
2561 /* Extra statistics */
2562 memset(&priv
->xstats
, 0, sizeof(struct stmmac_extra_stats
));
2563 priv
->xstats
.threshold
= tc
;
2565 priv
->dma_buf_sz
= STMMAC_ALIGN(buf_sz
);
2566 priv
->rx_copybreak
= STMMAC_RX_COPYBREAK
;
2568 ret
= alloc_dma_desc_resources(priv
);
2570 netdev_err(priv
->dev
, "%s: DMA descriptors allocation failed\n",
2572 goto dma_desc_error
;
2575 ret
= init_dma_desc_rings(dev
, GFP_KERNEL
);
2577 netdev_err(priv
->dev
, "%s: DMA descriptors initialization failed\n",
2582 ret
= stmmac_hw_setup(dev
, true);
2584 netdev_err(priv
->dev
, "%s: Hw setup failed\n", __func__
);
2588 stmmac_init_tx_coalesce(priv
);
2591 phy_start(dev
->phydev
);
2593 /* Request the IRQ lines */
2594 ret
= request_irq(dev
->irq
, stmmac_interrupt
,
2595 IRQF_SHARED
, dev
->name
, dev
);
2596 if (unlikely(ret
< 0)) {
2597 netdev_err(priv
->dev
,
2598 "%s: ERROR: allocating the IRQ %d (error: %d)\n",
2599 __func__
, dev
->irq
, ret
);
2603 /* Request the Wake IRQ in case of another line is used for WoL */
2604 if (priv
->wol_irq
!= dev
->irq
) {
2605 ret
= request_irq(priv
->wol_irq
, stmmac_interrupt
,
2606 IRQF_SHARED
, dev
->name
, dev
);
2607 if (unlikely(ret
< 0)) {
2608 netdev_err(priv
->dev
,
2609 "%s: ERROR: allocating the WoL IRQ %d (%d)\n",
2610 __func__
, priv
->wol_irq
, ret
);
2615 /* Request the IRQ lines */
2616 if (priv
->lpi_irq
> 0) {
2617 ret
= request_irq(priv
->lpi_irq
, stmmac_interrupt
, IRQF_SHARED
,
2619 if (unlikely(ret
< 0)) {
2620 netdev_err(priv
->dev
,
2621 "%s: ERROR: allocating the LPI IRQ %d (%d)\n",
2622 __func__
, priv
->lpi_irq
, ret
);
2627 stmmac_enable_all_queues(priv
);
2628 stmmac_start_all_queues(priv
);
2633 if (priv
->wol_irq
!= dev
->irq
)
2634 free_irq(priv
->wol_irq
, dev
);
2636 free_irq(dev
->irq
, dev
);
2639 phy_stop(dev
->phydev
);
2641 del_timer_sync(&priv
->txtimer
);
2642 stmmac_hw_teardown(dev
);
2644 free_dma_desc_resources(priv
);
2647 phy_disconnect(dev
->phydev
);
2653 * stmmac_release - close entry point of the driver
2654 * @dev : device pointer.
2656 * This is the stop entry point of the driver.
2658 static int stmmac_release(struct net_device
*dev
)
2660 struct stmmac_priv
*priv
= netdev_priv(dev
);
2662 if (priv
->eee_enabled
)
2663 del_timer_sync(&priv
->eee_ctrl_timer
);
2665 /* Stop and disconnect the PHY */
2667 phy_stop(dev
->phydev
);
2668 phy_disconnect(dev
->phydev
);
2671 stmmac_stop_all_queues(priv
);
2673 stmmac_disable_all_queues(priv
);
2675 del_timer_sync(&priv
->txtimer
);
2677 /* Free the IRQ lines */
2678 free_irq(dev
->irq
, dev
);
2679 if (priv
->wol_irq
!= dev
->irq
)
2680 free_irq(priv
->wol_irq
, dev
);
2681 if (priv
->lpi_irq
> 0)
2682 free_irq(priv
->lpi_irq
, dev
);
2684 /* Stop TX/RX DMA and clear the descriptors */
2685 stmmac_stop_all_dma(priv
);
2687 /* Release and free the Rx/Tx resources */
2688 free_dma_desc_resources(priv
);
2690 /* Disable the MAC Rx/Tx */
2691 priv
->hw
->mac
->set_mac(priv
->ioaddr
, false);
2693 netif_carrier_off(dev
);
2695 #ifdef CONFIG_DEBUG_FS
2696 stmmac_exit_fs(dev
);
2699 stmmac_release_ptp(priv
);
2705 * stmmac_tso_allocator - close entry point of the driver
2706 * @priv: driver private structure
2707 * @des: buffer start address
2708 * @total_len: total length to fill in descriptors
2709 * @last_segmant: condition for the last descriptor
2710 * @queue: TX queue index
2712 * This function fills descriptor and request new descriptors according to
2713 * buffer length to fill
2715 static void stmmac_tso_allocator(struct stmmac_priv
*priv
, unsigned int des
,
2716 int total_len
, bool last_segment
, u32 queue
)
2718 struct stmmac_tx_queue
*tx_q
= &priv
->tx_queue
[queue
];
2719 struct dma_desc
*desc
;
2723 tmp_len
= total_len
;
2725 while (tmp_len
> 0) {
2726 tx_q
->cur_tx
= STMMAC_GET_ENTRY(tx_q
->cur_tx
, DMA_TX_SIZE
);
2727 desc
= tx_q
->dma_tx
+ tx_q
->cur_tx
;
2729 desc
->des0
= cpu_to_le32(des
+ (total_len
- tmp_len
));
2730 buff_size
= tmp_len
>= TSO_MAX_BUFF_SIZE
?
2731 TSO_MAX_BUFF_SIZE
: tmp_len
;
2733 priv
->hw
->desc
->prepare_tso_tx_desc(desc
, 0, buff_size
,
2735 (last_segment
) && (tmp_len
<= TSO_MAX_BUFF_SIZE
),
2738 tmp_len
-= TSO_MAX_BUFF_SIZE
;
2743 * stmmac_tso_xmit - Tx entry point of the driver for oversized frames (TSO)
2744 * @skb : the socket buffer
2745 * @dev : device pointer
2746 * Description: this is the transmit function that is called on TSO frames
2747 * (support available on GMAC4 and newer chips).
2748 * Diagram below show the ring programming in case of TSO frames:
2752 * | DES0 |---> buffer1 = L2/L3/L4 header
2753 * | DES1 |---> TCP Payload (can continue on next descr...)
2754 * | DES2 |---> buffer 1 and 2 len
2755 * | DES3 |---> must set TSE, TCP hdr len-> [22:19]. TCP payload len [17:0]
2761 * | DES0 | --| Split TCP Payload on Buffers 1 and 2
2763 * | DES2 | --> buffer 1 and 2 len
2767 * mss is fixed when enable tso, so w/o programming the TDES3 ctx field.
2769 static netdev_tx_t
stmmac_tso_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
2771 struct dma_desc
*desc
, *first
, *mss_desc
= NULL
;
2772 struct stmmac_priv
*priv
= netdev_priv(dev
);
2773 int nfrags
= skb_shinfo(skb
)->nr_frags
;
2774 u32 queue
= skb_get_queue_mapping(skb
);
2775 unsigned int first_entry
, des
;
2776 struct stmmac_tx_queue
*tx_q
;
2777 int tmp_pay_len
= 0;
2782 tx_q
= &priv
->tx_queue
[queue
];
2784 /* Compute header lengths */
2785 proto_hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
2787 /* Desc availability based on threshold should be enough safe */
2788 if (unlikely(stmmac_tx_avail(priv
, queue
) <
2789 (((skb
->len
- proto_hdr_len
) / TSO_MAX_BUFF_SIZE
+ 1)))) {
2790 if (!netif_tx_queue_stopped(netdev_get_tx_queue(dev
, queue
))) {
2791 netif_tx_stop_queue(netdev_get_tx_queue(priv
->dev
,
2793 /* This is a hard error, log it. */
2794 netdev_err(priv
->dev
,
2795 "%s: Tx Ring full when queue awake\n",
2798 return NETDEV_TX_BUSY
;
2801 pay_len
= skb_headlen(skb
) - proto_hdr_len
; /* no frags */
2803 mss
= skb_shinfo(skb
)->gso_size
;
2805 /* set new MSS value if needed */
2806 if (mss
!= priv
->mss
) {
2807 mss_desc
= tx_q
->dma_tx
+ tx_q
->cur_tx
;
2808 priv
->hw
->desc
->set_mss(mss_desc
, mss
);
2810 tx_q
->cur_tx
= STMMAC_GET_ENTRY(tx_q
->cur_tx
, DMA_TX_SIZE
);
2813 if (netif_msg_tx_queued(priv
)) {
2814 pr_info("%s: tcphdrlen %d, hdr_len %d, pay_len %d, mss %d\n",
2815 __func__
, tcp_hdrlen(skb
), proto_hdr_len
, pay_len
, mss
);
2816 pr_info("\tskb->len %d, skb->data_len %d\n", skb
->len
,
2820 first_entry
= tx_q
->cur_tx
;
2822 desc
= tx_q
->dma_tx
+ first_entry
;
2825 /* first descriptor: fill Headers on Buf1 */
2826 des
= dma_map_single(priv
->device
, skb
->data
, skb_headlen(skb
),
2828 if (dma_mapping_error(priv
->device
, des
))
2831 tx_q
->tx_skbuff_dma
[first_entry
].buf
= des
;
2832 tx_q
->tx_skbuff_dma
[first_entry
].len
= skb_headlen(skb
);
2834 first
->des0
= cpu_to_le32(des
);
2836 /* Fill start of payload in buff2 of first descriptor */
2838 first
->des1
= cpu_to_le32(des
+ proto_hdr_len
);
2840 /* If needed take extra descriptors to fill the remaining payload */
2841 tmp_pay_len
= pay_len
- TSO_MAX_BUFF_SIZE
;
2843 stmmac_tso_allocator(priv
, des
, tmp_pay_len
, (nfrags
== 0), queue
);
2845 /* Prepare fragments */
2846 for (i
= 0; i
< nfrags
; i
++) {
2847 const skb_frag_t
*frag
= &skb_shinfo(skb
)->frags
[i
];
2849 des
= skb_frag_dma_map(priv
->device
, frag
, 0,
2850 skb_frag_size(frag
),
2852 if (dma_mapping_error(priv
->device
, des
))
2855 stmmac_tso_allocator(priv
, des
, skb_frag_size(frag
),
2856 (i
== nfrags
- 1), queue
);
2858 tx_q
->tx_skbuff_dma
[tx_q
->cur_tx
].buf
= des
;
2859 tx_q
->tx_skbuff_dma
[tx_q
->cur_tx
].len
= skb_frag_size(frag
);
2860 tx_q
->tx_skbuff
[tx_q
->cur_tx
] = NULL
;
2861 tx_q
->tx_skbuff_dma
[tx_q
->cur_tx
].map_as_page
= true;
2864 tx_q
->tx_skbuff_dma
[tx_q
->cur_tx
].last_segment
= true;
2866 /* Only the last descriptor gets to point to the skb. */
2867 tx_q
->tx_skbuff
[tx_q
->cur_tx
] = skb
;
2869 /* We've used all descriptors we need for this skb, however,
2870 * advance cur_tx so that it references a fresh descriptor.
2871 * ndo_start_xmit will fill this descriptor the next time it's
2872 * called and stmmac_tx_clean may clean up to this descriptor.
2874 tx_q
->cur_tx
= STMMAC_GET_ENTRY(tx_q
->cur_tx
, DMA_TX_SIZE
);
2876 if (unlikely(stmmac_tx_avail(priv
, queue
) <= (MAX_SKB_FRAGS
+ 1))) {
2877 netif_dbg(priv
, hw
, priv
->dev
, "%s: stop transmitted packets\n",
2879 netif_tx_stop_queue(netdev_get_tx_queue(priv
->dev
, queue
));
2882 dev
->stats
.tx_bytes
+= skb
->len
;
2883 priv
->xstats
.tx_tso_frames
++;
2884 priv
->xstats
.tx_tso_nfrags
+= nfrags
;
2886 /* Manage tx mitigation */
2887 priv
->tx_count_frames
+= nfrags
+ 1;
2888 if (likely(priv
->tx_coal_frames
> priv
->tx_count_frames
)) {
2889 mod_timer(&priv
->txtimer
,
2890 STMMAC_COAL_TIMER(priv
->tx_coal_timer
));
2892 priv
->tx_count_frames
= 0;
2893 priv
->hw
->desc
->set_tx_ic(desc
);
2894 priv
->xstats
.tx_set_ic_bit
++;
2897 skb_tx_timestamp(skb
);
2899 if (unlikely((skb_shinfo(skb
)->tx_flags
& SKBTX_HW_TSTAMP
) &&
2900 priv
->hwts_tx_en
)) {
2901 /* declare that device is doing timestamping */
2902 skb_shinfo(skb
)->tx_flags
|= SKBTX_IN_PROGRESS
;
2903 priv
->hw
->desc
->enable_tx_timestamp(first
);
2906 /* Complete the first descriptor before granting the DMA */
2907 priv
->hw
->desc
->prepare_tso_tx_desc(first
, 1,
2910 1, tx_q
->tx_skbuff_dma
[first_entry
].last_segment
,
2911 tcp_hdrlen(skb
) / 4, (skb
->len
- proto_hdr_len
));
2913 /* If context desc is used to change MSS */
2915 priv
->hw
->desc
->set_tx_owner(mss_desc
);
2917 /* The own bit must be the latest setting done when prepare the
2918 * descriptor and then barrier is needed to make sure that
2919 * all is coherent before granting the DMA engine.
2923 if (netif_msg_pktdata(priv
)) {
2924 pr_info("%s: curr=%d dirty=%d f=%d, e=%d, f_p=%p, nfrags %d\n",
2925 __func__
, tx_q
->cur_tx
, tx_q
->dirty_tx
, first_entry
,
2926 tx_q
->cur_tx
, first
, nfrags
);
2928 priv
->hw
->desc
->display_ring((void *)tx_q
->dma_tx
, DMA_TX_SIZE
,
2931 pr_info(">>> frame to be transmitted: ");
2932 print_pkt(skb
->data
, skb_headlen(skb
));
2935 netdev_tx_sent_queue(netdev_get_tx_queue(dev
, queue
), skb
->len
);
2937 priv
->hw
->dma
->set_tx_tail_ptr(priv
->ioaddr
, tx_q
->tx_tail_addr
,
2940 return NETDEV_TX_OK
;
2943 dev_err(priv
->device
, "Tx dma map failed\n");
2945 priv
->dev
->stats
.tx_dropped
++;
2946 return NETDEV_TX_OK
;
2950 * stmmac_xmit - Tx entry point of the driver
2951 * @skb : the socket buffer
2952 * @dev : device pointer
2953 * Description : this is the tx entry point of the driver.
2954 * It programs the chain or the ring and supports oversized frames
2957 static netdev_tx_t
stmmac_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
2959 struct stmmac_priv
*priv
= netdev_priv(dev
);
2960 unsigned int nopaged_len
= skb_headlen(skb
);
2961 int i
, csum_insertion
= 0, is_jumbo
= 0;
2962 u32 queue
= skb_get_queue_mapping(skb
);
2963 int nfrags
= skb_shinfo(skb
)->nr_frags
;
2965 unsigned int first_entry
;
2966 struct dma_desc
*desc
, *first
;
2967 struct stmmac_tx_queue
*tx_q
;
2968 unsigned int enh_desc
;
2971 tx_q
= &priv
->tx_queue
[queue
];
2973 /* Manage oversized TCP frames for GMAC4 device */
2974 if (skb_is_gso(skb
) && priv
->tso
) {
2975 if (skb_shinfo(skb
)->gso_type
& (SKB_GSO_TCPV4
| SKB_GSO_TCPV6
))
2976 return stmmac_tso_xmit(skb
, dev
);
2979 if (unlikely(stmmac_tx_avail(priv
, queue
) < nfrags
+ 1)) {
2980 if (!netif_tx_queue_stopped(netdev_get_tx_queue(dev
, queue
))) {
2981 netif_tx_stop_queue(netdev_get_tx_queue(priv
->dev
,
2983 /* This is a hard error, log it. */
2984 netdev_err(priv
->dev
,
2985 "%s: Tx Ring full when queue awake\n",
2988 return NETDEV_TX_BUSY
;
2991 if (priv
->tx_path_in_lpi_mode
)
2992 stmmac_disable_eee_mode(priv
);
2994 entry
= tx_q
->cur_tx
;
2995 first_entry
= entry
;
2997 csum_insertion
= (skb
->ip_summed
== CHECKSUM_PARTIAL
);
2999 if (likely(priv
->extend_desc
))
3000 desc
= (struct dma_desc
*)(tx_q
->dma_etx
+ entry
);
3002 desc
= tx_q
->dma_tx
+ entry
;
3006 enh_desc
= priv
->plat
->enh_desc
;
3007 /* To program the descriptors according to the size of the frame */
3009 is_jumbo
= priv
->hw
->mode
->is_jumbo_frm(skb
->len
, enh_desc
);
3011 if (unlikely(is_jumbo
) && likely(priv
->synopsys_id
<
3013 entry
= priv
->hw
->mode
->jumbo_frm(tx_q
, skb
, csum_insertion
);
3014 if (unlikely(entry
< 0))
3018 for (i
= 0; i
< nfrags
; i
++) {
3019 const skb_frag_t
*frag
= &skb_shinfo(skb
)->frags
[i
];
3020 int len
= skb_frag_size(frag
);
3021 bool last_segment
= (i
== (nfrags
- 1));
3023 entry
= STMMAC_GET_ENTRY(entry
, DMA_TX_SIZE
);
3025 if (likely(priv
->extend_desc
))
3026 desc
= (struct dma_desc
*)(tx_q
->dma_etx
+ entry
);
3028 desc
= tx_q
->dma_tx
+ entry
;
3030 des
= skb_frag_dma_map(priv
->device
, frag
, 0, len
,
3032 if (dma_mapping_error(priv
->device
, des
))
3033 goto dma_map_err
; /* should reuse desc w/o issues */
3035 tx_q
->tx_skbuff
[entry
] = NULL
;
3037 tx_q
->tx_skbuff_dma
[entry
].buf
= des
;
3038 if (unlikely(priv
->synopsys_id
>= DWMAC_CORE_4_00
))
3039 desc
->des0
= cpu_to_le32(des
);
3041 desc
->des2
= cpu_to_le32(des
);
3043 tx_q
->tx_skbuff_dma
[entry
].map_as_page
= true;
3044 tx_q
->tx_skbuff_dma
[entry
].len
= len
;
3045 tx_q
->tx_skbuff_dma
[entry
].last_segment
= last_segment
;
3047 /* Prepare the descriptor and set the own bit too */
3048 priv
->hw
->desc
->prepare_tx_desc(desc
, 0, len
, csum_insertion
,
3049 priv
->mode
, 1, last_segment
,
3053 /* Only the last descriptor gets to point to the skb. */
3054 tx_q
->tx_skbuff
[entry
] = skb
;
3056 /* We've used all descriptors we need for this skb, however,
3057 * advance cur_tx so that it references a fresh descriptor.
3058 * ndo_start_xmit will fill this descriptor the next time it's
3059 * called and stmmac_tx_clean may clean up to this descriptor.
3061 entry
= STMMAC_GET_ENTRY(entry
, DMA_TX_SIZE
);
3062 tx_q
->cur_tx
= entry
;
3064 if (netif_msg_pktdata(priv
)) {
3067 netdev_dbg(priv
->dev
,
3068 "%s: curr=%d dirty=%d f=%d, e=%d, first=%p, nfrags=%d",
3069 __func__
, tx_q
->cur_tx
, tx_q
->dirty_tx
, first_entry
,
3070 entry
, first
, nfrags
);
3072 if (priv
->extend_desc
)
3073 tx_head
= (void *)tx_q
->dma_etx
;
3075 tx_head
= (void *)tx_q
->dma_tx
;
3077 priv
->hw
->desc
->display_ring(tx_head
, DMA_TX_SIZE
, false);
3079 netdev_dbg(priv
->dev
, ">>> frame to be transmitted: ");
3080 print_pkt(skb
->data
, skb
->len
);
3083 if (unlikely(stmmac_tx_avail(priv
, queue
) <= (MAX_SKB_FRAGS
+ 1))) {
3084 netif_dbg(priv
, hw
, priv
->dev
, "%s: stop transmitted packets\n",
3086 netif_tx_stop_queue(netdev_get_tx_queue(priv
->dev
, queue
));
3089 dev
->stats
.tx_bytes
+= skb
->len
;
3091 /* According to the coalesce parameter the IC bit for the latest
3092 * segment is reset and the timer re-started to clean the tx status.
3093 * This approach takes care about the fragments: desc is the first
3094 * element in case of no SG.
3096 priv
->tx_count_frames
+= nfrags
+ 1;
3097 if (likely(priv
->tx_coal_frames
> priv
->tx_count_frames
)) {
3098 mod_timer(&priv
->txtimer
,
3099 STMMAC_COAL_TIMER(priv
->tx_coal_timer
));
3101 priv
->tx_count_frames
= 0;
3102 priv
->hw
->desc
->set_tx_ic(desc
);
3103 priv
->xstats
.tx_set_ic_bit
++;
3106 skb_tx_timestamp(skb
);
3108 /* Ready to fill the first descriptor and set the OWN bit w/o any
3109 * problems because all the descriptors are actually ready to be
3110 * passed to the DMA engine.
3112 if (likely(!is_jumbo
)) {
3113 bool last_segment
= (nfrags
== 0);
3115 des
= dma_map_single(priv
->device
, skb
->data
,
3116 nopaged_len
, DMA_TO_DEVICE
);
3117 if (dma_mapping_error(priv
->device
, des
))
3120 tx_q
->tx_skbuff_dma
[first_entry
].buf
= des
;
3121 if (unlikely(priv
->synopsys_id
>= DWMAC_CORE_4_00
))
3122 first
->des0
= cpu_to_le32(des
);
3124 first
->des2
= cpu_to_le32(des
);
3126 tx_q
->tx_skbuff_dma
[first_entry
].len
= nopaged_len
;
3127 tx_q
->tx_skbuff_dma
[first_entry
].last_segment
= last_segment
;
3129 if (unlikely((skb_shinfo(skb
)->tx_flags
& SKBTX_HW_TSTAMP
) &&
3130 priv
->hwts_tx_en
)) {
3131 /* declare that device is doing timestamping */
3132 skb_shinfo(skb
)->tx_flags
|= SKBTX_IN_PROGRESS
;
3133 priv
->hw
->desc
->enable_tx_timestamp(first
);
3136 /* Prepare the first descriptor setting the OWN bit too */
3137 priv
->hw
->desc
->prepare_tx_desc(first
, 1, nopaged_len
,
3138 csum_insertion
, priv
->mode
, 1,
3139 last_segment
, skb
->len
);
3141 /* The own bit must be the latest setting done when prepare the
3142 * descriptor and then barrier is needed to make sure that
3143 * all is coherent before granting the DMA engine.
3148 netdev_tx_sent_queue(netdev_get_tx_queue(dev
, queue
), skb
->len
);
3150 if (priv
->synopsys_id
< DWMAC_CORE_4_00
)
3151 priv
->hw
->dma
->enable_dma_transmission(priv
->ioaddr
);
3153 priv
->hw
->dma
->set_tx_tail_ptr(priv
->ioaddr
, tx_q
->tx_tail_addr
,
3156 return NETDEV_TX_OK
;
3159 netdev_err(priv
->dev
, "Tx DMA map failed\n");
3161 priv
->dev
->stats
.tx_dropped
++;
3162 return NETDEV_TX_OK
;
3165 static void stmmac_rx_vlan(struct net_device
*dev
, struct sk_buff
*skb
)
3167 struct ethhdr
*ehdr
;
3170 if ((dev
->features
& NETIF_F_HW_VLAN_CTAG_RX
) ==
3171 NETIF_F_HW_VLAN_CTAG_RX
&&
3172 !__vlan_get_tag(skb
, &vlanid
)) {
3173 /* pop the vlan tag */
3174 ehdr
= (struct ethhdr
*)skb
->data
;
3175 memmove(skb
->data
+ VLAN_HLEN
, ehdr
, ETH_ALEN
* 2);
3176 skb_pull(skb
, VLAN_HLEN
);
3177 __vlan_hwaccel_put_tag(skb
, htons(ETH_P_8021Q
), vlanid
);
3182 static inline int stmmac_rx_threshold_count(struct stmmac_rx_queue
*rx_q
)
3184 if (rx_q
->rx_zeroc_thresh
< STMMAC_RX_THRESH
)
3191 * stmmac_rx_refill - refill used skb preallocated buffers
3192 * @priv: driver private structure
3193 * @queue: RX queue index
3194 * Description : this is to reallocate the skb for the reception process
3195 * that is based on zero-copy.
3197 static inline void stmmac_rx_refill(struct stmmac_priv
*priv
, u32 queue
)
3199 struct stmmac_rx_queue
*rx_q
= &priv
->rx_queue
[queue
];
3200 int dirty
= stmmac_rx_dirty(priv
, queue
);
3201 unsigned int entry
= rx_q
->dirty_rx
;
3203 int bfsize
= priv
->dma_buf_sz
;
3205 while (dirty
-- > 0) {
3208 if (priv
->extend_desc
)
3209 p
= (struct dma_desc
*)(rx_q
->dma_erx
+ entry
);
3211 p
= rx_q
->dma_rx
+ entry
;
3213 if (likely(!rx_q
->rx_skbuff
[entry
])) {
3214 struct sk_buff
*skb
;
3216 skb
= netdev_alloc_skb_ip_align(priv
->dev
, bfsize
);
3217 if (unlikely(!skb
)) {
3218 /* so for a while no zero-copy! */
3219 rx_q
->rx_zeroc_thresh
= STMMAC_RX_THRESH
;
3220 if (unlikely(net_ratelimit()))
3221 dev_err(priv
->device
,
3222 "fail to alloc skb entry %d\n",
3227 rx_q
->rx_skbuff
[entry
] = skb
;
3228 rx_q
->rx_skbuff_dma
[entry
] =
3229 dma_map_single(priv
->device
, skb
->data
, bfsize
,
3231 if (dma_mapping_error(priv
->device
,
3232 rx_q
->rx_skbuff_dma
[entry
])) {
3233 netdev_err(priv
->dev
, "Rx DMA map failed\n");
3238 if (unlikely(priv
->synopsys_id
>= DWMAC_CORE_4_00
)) {
3239 p
->des0
= cpu_to_le32(rx_q
->rx_skbuff_dma
[entry
]);
3242 p
->des2
= cpu_to_le32(rx_q
->rx_skbuff_dma
[entry
]);
3244 if (priv
->hw
->mode
->refill_desc3
)
3245 priv
->hw
->mode
->refill_desc3(rx_q
, p
);
3247 if (rx_q
->rx_zeroc_thresh
> 0)
3248 rx_q
->rx_zeroc_thresh
--;
3250 netif_dbg(priv
, rx_status
, priv
->dev
,
3251 "refill entry #%d\n", entry
);
3255 if (unlikely(priv
->synopsys_id
>= DWMAC_CORE_4_00
))
3256 priv
->hw
->desc
->init_rx_desc(p
, priv
->use_riwt
, 0, 0);
3258 priv
->hw
->desc
->set_rx_owner(p
);
3262 entry
= STMMAC_GET_ENTRY(entry
, DMA_RX_SIZE
);
3264 rx_q
->dirty_rx
= entry
;
3268 * stmmac_rx - manage the receive process
3269 * @priv: driver private structure
3270 * @limit: napi bugget
3271 * @queue: RX queue index.
3272 * Description : this the function called by the napi poll method.
3273 * It gets all the frames inside the ring.
3275 static int stmmac_rx(struct stmmac_priv
*priv
, int limit
, u32 queue
)
3277 struct stmmac_rx_queue
*rx_q
= &priv
->rx_queue
[queue
];
3278 unsigned int entry
= rx_q
->cur_rx
;
3279 int coe
= priv
->hw
->rx_csum
;
3280 unsigned int next_entry
;
3281 unsigned int count
= 0;
3283 if (netif_msg_rx_status(priv
)) {
3286 netdev_dbg(priv
->dev
, "%s: descriptor ring:\n", __func__
);
3287 if (priv
->extend_desc
)
3288 rx_head
= (void *)rx_q
->dma_erx
;
3290 rx_head
= (void *)rx_q
->dma_rx
;
3292 priv
->hw
->desc
->display_ring(rx_head
, DMA_RX_SIZE
, true);
3294 while (count
< limit
) {
3297 struct dma_desc
*np
;
3299 if (priv
->extend_desc
)
3300 p
= (struct dma_desc
*)(rx_q
->dma_erx
+ entry
);
3302 p
= rx_q
->dma_rx
+ entry
;
3304 /* read the status of the incoming frame */
3305 status
= priv
->hw
->desc
->rx_status(&priv
->dev
->stats
,
3307 /* check if managed by the DMA otherwise go ahead */
3308 if (unlikely(status
& dma_own
))
3313 rx_q
->cur_rx
= STMMAC_GET_ENTRY(rx_q
->cur_rx
, DMA_RX_SIZE
);
3314 next_entry
= rx_q
->cur_rx
;
3316 if (priv
->extend_desc
)
3317 np
= (struct dma_desc
*)(rx_q
->dma_erx
+ next_entry
);
3319 np
= rx_q
->dma_rx
+ next_entry
;
3323 if ((priv
->extend_desc
) && (priv
->hw
->desc
->rx_extended_status
))
3324 priv
->hw
->desc
->rx_extended_status(&priv
->dev
->stats
,
3328 if (unlikely(status
== discard_frame
)) {
3329 priv
->dev
->stats
.rx_errors
++;
3330 if (priv
->hwts_rx_en
&& !priv
->extend_desc
) {
3331 /* DESC2 & DESC3 will be overwritten by device
3332 * with timestamp value, hence reinitialize
3333 * them in stmmac_rx_refill() function so that
3334 * device can reuse it.
3336 rx_q
->rx_skbuff
[entry
] = NULL
;
3337 dma_unmap_single(priv
->device
,
3338 rx_q
->rx_skbuff_dma
[entry
],
3343 struct sk_buff
*skb
;
3347 if (unlikely(priv
->synopsys_id
>= DWMAC_CORE_4_00
))
3348 des
= le32_to_cpu(p
->des0
);
3350 des
= le32_to_cpu(p
->des2
);
3352 frame_len
= priv
->hw
->desc
->get_rx_frame_len(p
, coe
);
3354 /* If frame length is greater than skb buffer size
3355 * (preallocated during init) then the packet is
3358 if (frame_len
> priv
->dma_buf_sz
) {
3359 netdev_err(priv
->dev
,
3360 "len %d larger than size (%d)\n",
3361 frame_len
, priv
->dma_buf_sz
);
3362 priv
->dev
->stats
.rx_length_errors
++;
3366 /* ACS is set; GMAC core strips PAD/FCS for IEEE 802.3
3367 * Type frames (LLC/LLC-SNAP)
3369 if (unlikely(status
!= llc_snap
))
3370 frame_len
-= ETH_FCS_LEN
;
3372 if (netif_msg_rx_status(priv
)) {
3373 netdev_dbg(priv
->dev
, "\tdesc: %p [entry %d] buff=0x%x\n",
3375 if (frame_len
> ETH_FRAME_LEN
)
3376 netdev_dbg(priv
->dev
, "frame size %d, COE: %d\n",
3380 /* The zero-copy is always used for all the sizes
3381 * in case of GMAC4 because it needs
3382 * to refill the used descriptors, always.
3384 if (unlikely(!priv
->plat
->has_gmac4
&&
3385 ((frame_len
< priv
->rx_copybreak
) ||
3386 stmmac_rx_threshold_count(rx_q
)))) {
3387 skb
= netdev_alloc_skb_ip_align(priv
->dev
,
3389 if (unlikely(!skb
)) {
3390 if (net_ratelimit())
3391 dev_warn(priv
->device
,
3392 "packet dropped\n");
3393 priv
->dev
->stats
.rx_dropped
++;
3397 dma_sync_single_for_cpu(priv
->device
,
3401 skb_copy_to_linear_data(skb
,
3403 rx_skbuff
[entry
]->data
,
3406 skb_put(skb
, frame_len
);
3407 dma_sync_single_for_device(priv
->device
,
3412 skb
= rx_q
->rx_skbuff
[entry
];
3413 if (unlikely(!skb
)) {
3414 netdev_err(priv
->dev
,
3415 "%s: Inconsistent Rx chain\n",
3417 priv
->dev
->stats
.rx_dropped
++;
3420 prefetch(skb
->data
- NET_IP_ALIGN
);
3421 rx_q
->rx_skbuff
[entry
] = NULL
;
3422 rx_q
->rx_zeroc_thresh
++;
3424 skb_put(skb
, frame_len
);
3425 dma_unmap_single(priv
->device
,
3426 rx_q
->rx_skbuff_dma
[entry
],
3431 if (netif_msg_pktdata(priv
)) {
3432 netdev_dbg(priv
->dev
, "frame received (%dbytes)",
3434 print_pkt(skb
->data
, frame_len
);
3437 stmmac_get_rx_hwtstamp(priv
, p
, np
, skb
);
3439 stmmac_rx_vlan(priv
->dev
, skb
);
3441 skb
->protocol
= eth_type_trans(skb
, priv
->dev
);
3444 skb_checksum_none_assert(skb
);
3446 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
3448 napi_gro_receive(&rx_q
->napi
, skb
);
3450 priv
->dev
->stats
.rx_packets
++;
3451 priv
->dev
->stats
.rx_bytes
+= frame_len
;
3456 stmmac_rx_refill(priv
, queue
);
3458 priv
->xstats
.rx_pkt_n
+= count
;
3464 * stmmac_poll - stmmac poll method (NAPI)
3465 * @napi : pointer to the napi structure.
3466 * @budget : maximum number of packets that the current CPU can receive from
3469 * To look at the incoming frames and clear the tx resources.
3471 static int stmmac_poll(struct napi_struct
*napi
, int budget
)
3473 struct stmmac_rx_queue
*rx_q
=
3474 container_of(napi
, struct stmmac_rx_queue
, napi
);
3475 struct stmmac_priv
*priv
= rx_q
->priv_data
;
3476 u32 tx_count
= priv
->plat
->tx_queues_to_use
;
3477 u32 chan
= rx_q
->queue_index
;
3481 priv
->xstats
.napi_poll
++;
3483 /* check all the queues */
3484 for (queue
= 0; queue
< tx_count
; queue
++)
3485 stmmac_tx_clean(priv
, queue
);
3487 work_done
= stmmac_rx(priv
, budget
, rx_q
->queue_index
);
3488 if (work_done
< budget
) {
3489 napi_complete_done(napi
, work_done
);
3490 stmmac_enable_dma_irq(priv
, chan
);
3497 * @dev : Pointer to net device structure
3498 * Description: this function is called when a packet transmission fails to
3499 * complete within a reasonable time. The driver will mark the error in the
3500 * netdev structure and arrange for the device to be reset to a sane state
3501 * in order to transmit a new packet.
3503 static void stmmac_tx_timeout(struct net_device
*dev
)
3505 struct stmmac_priv
*priv
= netdev_priv(dev
);
3506 u32 tx_count
= priv
->plat
->tx_queues_to_use
;
3509 /* Clear Tx resources and restart transmitting again */
3510 for (chan
= 0; chan
< tx_count
; chan
++)
3511 stmmac_tx_err(priv
, chan
);
3515 * stmmac_set_rx_mode - entry point for multicast addressing
3516 * @dev : pointer to the device structure
3518 * This function is a driver entry point which gets called by the kernel
3519 * whenever multicast addresses must be enabled/disabled.
3523 static void stmmac_set_rx_mode(struct net_device
*dev
)
3525 struct stmmac_priv
*priv
= netdev_priv(dev
);
3527 priv
->hw
->mac
->set_filter(priv
->hw
, dev
);
3531 * stmmac_change_mtu - entry point to change MTU size for the device.
3532 * @dev : device pointer.
3533 * @new_mtu : the new MTU size for the device.
3534 * Description: the Maximum Transfer Unit (MTU) is used by the network layer
3535 * to drive packet transmission. Ethernet has an MTU of 1500 octets
3536 * (ETH_DATA_LEN). This value can be changed with ifconfig.
3538 * 0 on success and an appropriate (-)ve integer as defined in errno.h
3541 static int stmmac_change_mtu(struct net_device
*dev
, int new_mtu
)
3543 struct stmmac_priv
*priv
= netdev_priv(dev
);
3545 if (netif_running(dev
)) {
3546 netdev_err(priv
->dev
, "must be stopped to change its MTU\n");
3552 netdev_update_features(dev
);
3557 static netdev_features_t
stmmac_fix_features(struct net_device
*dev
,
3558 netdev_features_t features
)
3560 struct stmmac_priv
*priv
= netdev_priv(dev
);
3562 if (priv
->plat
->rx_coe
== STMMAC_RX_COE_NONE
)
3563 features
&= ~NETIF_F_RXCSUM
;
3565 if (!priv
->plat
->tx_coe
)
3566 features
&= ~NETIF_F_CSUM_MASK
;
3568 /* Some GMAC devices have a bugged Jumbo frame support that
3569 * needs to have the Tx COE disabled for oversized frames
3570 * (due to limited buffer sizes). In this case we disable
3571 * the TX csum insertion in the TDES and not use SF.
3573 if (priv
->plat
->bugged_jumbo
&& (dev
->mtu
> ETH_DATA_LEN
))
3574 features
&= ~NETIF_F_CSUM_MASK
;
3576 /* Disable tso if asked by ethtool */
3577 if ((priv
->plat
->tso_en
) && (priv
->dma_cap
.tsoen
)) {
3578 if (features
& NETIF_F_TSO
)
3587 static int stmmac_set_features(struct net_device
*netdev
,
3588 netdev_features_t features
)
3590 struct stmmac_priv
*priv
= netdev_priv(netdev
);
3592 /* Keep the COE Type in case of csum is supporting */
3593 if (features
& NETIF_F_RXCSUM
)
3594 priv
->hw
->rx_csum
= priv
->plat
->rx_coe
;
3596 priv
->hw
->rx_csum
= 0;
3597 /* No check needed because rx_coe has been set before and it will be
3598 * fixed in case of issue.
3600 priv
->hw
->mac
->rx_ipc(priv
->hw
);
3606 * stmmac_interrupt - main ISR
3607 * @irq: interrupt number.
3608 * @dev_id: to pass the net device pointer.
3609 * Description: this is the main driver interrupt service routine.
3611 * o DMA service routine (to manage incoming frame reception and transmission
3613 * o Core interrupts to manage: remote wake-up, management counter, LPI
3616 static irqreturn_t
stmmac_interrupt(int irq
, void *dev_id
)
3618 struct net_device
*dev
= (struct net_device
*)dev_id
;
3619 struct stmmac_priv
*priv
= netdev_priv(dev
);
3620 u32 rx_cnt
= priv
->plat
->rx_queues_to_use
;
3621 u32 tx_cnt
= priv
->plat
->tx_queues_to_use
;
3625 queues_count
= (rx_cnt
> tx_cnt
) ? rx_cnt
: tx_cnt
;
3628 pm_wakeup_event(priv
->device
, 0);
3630 if (unlikely(!dev
)) {
3631 netdev_err(priv
->dev
, "%s: invalid dev pointer\n", __func__
);
3635 /* To handle GMAC own interrupts */
3636 if ((priv
->plat
->has_gmac
) || (priv
->plat
->has_gmac4
)) {
3637 int status
= priv
->hw
->mac
->host_irq_status(priv
->hw
,
3640 if (unlikely(status
)) {
3641 /* For LPI we need to save the tx status */
3642 if (status
& CORE_IRQ_TX_PATH_IN_LPI_MODE
)
3643 priv
->tx_path_in_lpi_mode
= true;
3644 if (status
& CORE_IRQ_TX_PATH_EXIT_LPI_MODE
)
3645 priv
->tx_path_in_lpi_mode
= false;
3648 if (priv
->synopsys_id
>= DWMAC_CORE_4_00
) {
3649 for (queue
= 0; queue
< queues_count
; queue
++) {
3650 struct stmmac_rx_queue
*rx_q
=
3651 &priv
->rx_queue
[queue
];
3654 priv
->hw
->mac
->host_mtl_irq_status(priv
->hw
,
3657 if (status
& CORE_IRQ_MTL_RX_OVERFLOW
&&
3658 priv
->hw
->dma
->set_rx_tail_ptr
)
3659 priv
->hw
->dma
->set_rx_tail_ptr(priv
->ioaddr
,
3665 /* PCS link status */
3666 if (priv
->hw
->pcs
) {
3667 if (priv
->xstats
.pcs_link
)
3668 netif_carrier_on(dev
);
3670 netif_carrier_off(dev
);
3674 /* To handle DMA interrupts */
3675 stmmac_dma_interrupt(priv
);
3680 #ifdef CONFIG_NET_POLL_CONTROLLER
3681 /* Polling receive - used by NETCONSOLE and other diagnostic tools
3682 * to allow network I/O with interrupts disabled.
3684 static void stmmac_poll_controller(struct net_device
*dev
)
3686 disable_irq(dev
->irq
);
3687 stmmac_interrupt(dev
->irq
, dev
);
3688 enable_irq(dev
->irq
);
3693 * stmmac_ioctl - Entry point for the Ioctl
3694 * @dev: Device pointer.
3695 * @rq: An IOCTL specefic structure, that can contain a pointer to
3696 * a proprietary structure used to pass information to the driver.
3697 * @cmd: IOCTL command
3699 * Currently it supports the phy_mii_ioctl(...) and HW time stamping.
3701 static int stmmac_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
)
3703 int ret
= -EOPNOTSUPP
;
3705 if (!netif_running(dev
))
3714 ret
= phy_mii_ioctl(dev
->phydev
, rq
, cmd
);
3717 ret
= stmmac_hwtstamp_ioctl(dev
, rq
);
3726 #ifdef CONFIG_DEBUG_FS
3727 static struct dentry
*stmmac_fs_dir
;
3729 static void sysfs_display_ring(void *head
, int size
, int extend_desc
,
3730 struct seq_file
*seq
)
3733 struct dma_extended_desc
*ep
= (struct dma_extended_desc
*)head
;
3734 struct dma_desc
*p
= (struct dma_desc
*)head
;
3736 for (i
= 0; i
< size
; i
++) {
3738 seq_printf(seq
, "%d [0x%x]: 0x%x 0x%x 0x%x 0x%x\n",
3739 i
, (unsigned int)virt_to_phys(ep
),
3740 le32_to_cpu(ep
->basic
.des0
),
3741 le32_to_cpu(ep
->basic
.des1
),
3742 le32_to_cpu(ep
->basic
.des2
),
3743 le32_to_cpu(ep
->basic
.des3
));
3746 seq_printf(seq
, "%d [0x%x]: 0x%x 0x%x 0x%x 0x%x\n",
3747 i
, (unsigned int)virt_to_phys(p
),
3748 le32_to_cpu(p
->des0
), le32_to_cpu(p
->des1
),
3749 le32_to_cpu(p
->des2
), le32_to_cpu(p
->des3
));
3752 seq_printf(seq
, "\n");
3756 static int stmmac_sysfs_ring_read(struct seq_file
*seq
, void *v
)
3758 struct net_device
*dev
= seq
->private;
3759 struct stmmac_priv
*priv
= netdev_priv(dev
);
3760 u32 rx_count
= priv
->plat
->rx_queues_to_use
;
3761 u32 tx_count
= priv
->plat
->tx_queues_to_use
;
3764 for (queue
= 0; queue
< rx_count
; queue
++) {
3765 struct stmmac_rx_queue
*rx_q
= &priv
->rx_queue
[queue
];
3767 seq_printf(seq
, "RX Queue %d:\n", queue
);
3769 if (priv
->extend_desc
) {
3770 seq_printf(seq
, "Extended descriptor ring:\n");
3771 sysfs_display_ring((void *)rx_q
->dma_erx
,
3772 DMA_RX_SIZE
, 1, seq
);
3774 seq_printf(seq
, "Descriptor ring:\n");
3775 sysfs_display_ring((void *)rx_q
->dma_rx
,
3776 DMA_RX_SIZE
, 0, seq
);
3780 for (queue
= 0; queue
< tx_count
; queue
++) {
3781 struct stmmac_tx_queue
*tx_q
= &priv
->tx_queue
[queue
];
3783 seq_printf(seq
, "TX Queue %d:\n", queue
);
3785 if (priv
->extend_desc
) {
3786 seq_printf(seq
, "Extended descriptor ring:\n");
3787 sysfs_display_ring((void *)tx_q
->dma_etx
,
3788 DMA_TX_SIZE
, 1, seq
);
3790 seq_printf(seq
, "Descriptor ring:\n");
3791 sysfs_display_ring((void *)tx_q
->dma_tx
,
3792 DMA_TX_SIZE
, 0, seq
);
3799 static int stmmac_sysfs_ring_open(struct inode
*inode
, struct file
*file
)
3801 return single_open(file
, stmmac_sysfs_ring_read
, inode
->i_private
);
3804 /* Debugfs files, should appear in /sys/kernel/debug/stmmaceth/eth0 */
3806 static const struct file_operations stmmac_rings_status_fops
= {
3807 .owner
= THIS_MODULE
,
3808 .open
= stmmac_sysfs_ring_open
,
3810 .llseek
= seq_lseek
,
3811 .release
= single_release
,
3814 static int stmmac_sysfs_dma_cap_read(struct seq_file
*seq
, void *v
)
3816 struct net_device
*dev
= seq
->private;
3817 struct stmmac_priv
*priv
= netdev_priv(dev
);
3819 if (!priv
->hw_cap_support
) {
3820 seq_printf(seq
, "DMA HW features not supported\n");
3824 seq_printf(seq
, "==============================\n");
3825 seq_printf(seq
, "\tDMA HW features\n");
3826 seq_printf(seq
, "==============================\n");
3828 seq_printf(seq
, "\t10/100 Mbps: %s\n",
3829 (priv
->dma_cap
.mbps_10_100
) ? "Y" : "N");
3830 seq_printf(seq
, "\t1000 Mbps: %s\n",
3831 (priv
->dma_cap
.mbps_1000
) ? "Y" : "N");
3832 seq_printf(seq
, "\tHalf duplex: %s\n",
3833 (priv
->dma_cap
.half_duplex
) ? "Y" : "N");
3834 seq_printf(seq
, "\tHash Filter: %s\n",
3835 (priv
->dma_cap
.hash_filter
) ? "Y" : "N");
3836 seq_printf(seq
, "\tMultiple MAC address registers: %s\n",
3837 (priv
->dma_cap
.multi_addr
) ? "Y" : "N");
3838 seq_printf(seq
, "\tPCS (TBI/SGMII/RTBI PHY interfaces): %s\n",
3839 (priv
->dma_cap
.pcs
) ? "Y" : "N");
3840 seq_printf(seq
, "\tSMA (MDIO) Interface: %s\n",
3841 (priv
->dma_cap
.sma_mdio
) ? "Y" : "N");
3842 seq_printf(seq
, "\tPMT Remote wake up: %s\n",
3843 (priv
->dma_cap
.pmt_remote_wake_up
) ? "Y" : "N");
3844 seq_printf(seq
, "\tPMT Magic Frame: %s\n",
3845 (priv
->dma_cap
.pmt_magic_frame
) ? "Y" : "N");
3846 seq_printf(seq
, "\tRMON module: %s\n",
3847 (priv
->dma_cap
.rmon
) ? "Y" : "N");
3848 seq_printf(seq
, "\tIEEE 1588-2002 Time Stamp: %s\n",
3849 (priv
->dma_cap
.time_stamp
) ? "Y" : "N");
3850 seq_printf(seq
, "\tIEEE 1588-2008 Advanced Time Stamp: %s\n",
3851 (priv
->dma_cap
.atime_stamp
) ? "Y" : "N");
3852 seq_printf(seq
, "\t802.3az - Energy-Efficient Ethernet (EEE): %s\n",
3853 (priv
->dma_cap
.eee
) ? "Y" : "N");
3854 seq_printf(seq
, "\tAV features: %s\n", (priv
->dma_cap
.av
) ? "Y" : "N");
3855 seq_printf(seq
, "\tChecksum Offload in TX: %s\n",
3856 (priv
->dma_cap
.tx_coe
) ? "Y" : "N");
3857 if (priv
->synopsys_id
>= DWMAC_CORE_4_00
) {
3858 seq_printf(seq
, "\tIP Checksum Offload in RX: %s\n",
3859 (priv
->dma_cap
.rx_coe
) ? "Y" : "N");
3861 seq_printf(seq
, "\tIP Checksum Offload (type1) in RX: %s\n",
3862 (priv
->dma_cap
.rx_coe_type1
) ? "Y" : "N");
3863 seq_printf(seq
, "\tIP Checksum Offload (type2) in RX: %s\n",
3864 (priv
->dma_cap
.rx_coe_type2
) ? "Y" : "N");
3866 seq_printf(seq
, "\tRXFIFO > 2048bytes: %s\n",
3867 (priv
->dma_cap
.rxfifo_over_2048
) ? "Y" : "N");
3868 seq_printf(seq
, "\tNumber of Additional RX channel: %d\n",
3869 priv
->dma_cap
.number_rx_channel
);
3870 seq_printf(seq
, "\tNumber of Additional TX channel: %d\n",
3871 priv
->dma_cap
.number_tx_channel
);
3872 seq_printf(seq
, "\tEnhanced descriptors: %s\n",
3873 (priv
->dma_cap
.enh_desc
) ? "Y" : "N");
3878 static int stmmac_sysfs_dma_cap_open(struct inode
*inode
, struct file
*file
)
3880 return single_open(file
, stmmac_sysfs_dma_cap_read
, inode
->i_private
);
3883 static const struct file_operations stmmac_dma_cap_fops
= {
3884 .owner
= THIS_MODULE
,
3885 .open
= stmmac_sysfs_dma_cap_open
,
3887 .llseek
= seq_lseek
,
3888 .release
= single_release
,
3891 static int stmmac_init_fs(struct net_device
*dev
)
3893 struct stmmac_priv
*priv
= netdev_priv(dev
);
3895 /* Create per netdev entries */
3896 priv
->dbgfs_dir
= debugfs_create_dir(dev
->name
, stmmac_fs_dir
);
3898 if (!priv
->dbgfs_dir
|| IS_ERR(priv
->dbgfs_dir
)) {
3899 netdev_err(priv
->dev
, "ERROR failed to create debugfs directory\n");
3904 /* Entry to report DMA RX/TX rings */
3905 priv
->dbgfs_rings_status
=
3906 debugfs_create_file("descriptors_status", S_IRUGO
,
3907 priv
->dbgfs_dir
, dev
,
3908 &stmmac_rings_status_fops
);
3910 if (!priv
->dbgfs_rings_status
|| IS_ERR(priv
->dbgfs_rings_status
)) {
3911 netdev_err(priv
->dev
, "ERROR creating stmmac ring debugfs file\n");
3912 debugfs_remove_recursive(priv
->dbgfs_dir
);
3917 /* Entry to report the DMA HW features */
3918 priv
->dbgfs_dma_cap
= debugfs_create_file("dma_cap", S_IRUGO
,
3920 dev
, &stmmac_dma_cap_fops
);
3922 if (!priv
->dbgfs_dma_cap
|| IS_ERR(priv
->dbgfs_dma_cap
)) {
3923 netdev_err(priv
->dev
, "ERROR creating stmmac MMC debugfs file\n");
3924 debugfs_remove_recursive(priv
->dbgfs_dir
);
3932 static void stmmac_exit_fs(struct net_device
*dev
)
3934 struct stmmac_priv
*priv
= netdev_priv(dev
);
3936 debugfs_remove_recursive(priv
->dbgfs_dir
);
3938 #endif /* CONFIG_DEBUG_FS */
3940 static const struct net_device_ops stmmac_netdev_ops
= {
3941 .ndo_open
= stmmac_open
,
3942 .ndo_start_xmit
= stmmac_xmit
,
3943 .ndo_stop
= stmmac_release
,
3944 .ndo_change_mtu
= stmmac_change_mtu
,
3945 .ndo_fix_features
= stmmac_fix_features
,
3946 .ndo_set_features
= stmmac_set_features
,
3947 .ndo_set_rx_mode
= stmmac_set_rx_mode
,
3948 .ndo_tx_timeout
= stmmac_tx_timeout
,
3949 .ndo_do_ioctl
= stmmac_ioctl
,
3950 #ifdef CONFIG_NET_POLL_CONTROLLER
3951 .ndo_poll_controller
= stmmac_poll_controller
,
3953 .ndo_set_mac_address
= eth_mac_addr
,
3957 * stmmac_hw_init - Init the MAC device
3958 * @priv: driver private structure
3959 * Description: this function is to configure the MAC device according to
3960 * some platform parameters or the HW capability register. It prepares the
3961 * driver to use either ring or chain modes and to setup either enhanced or
3962 * normal descriptors.
3964 static int stmmac_hw_init(struct stmmac_priv
*priv
)
3966 struct mac_device_info
*mac
;
3968 /* Identify the MAC HW device */
3969 if (priv
->plat
->setup
) {
3970 mac
= priv
->plat
->setup(priv
);
3971 } else if (priv
->plat
->has_gmac
) {
3972 priv
->dev
->priv_flags
|= IFF_UNICAST_FLT
;
3973 mac
= dwmac1000_setup(priv
->ioaddr
,
3974 priv
->plat
->multicast_filter_bins
,
3975 priv
->plat
->unicast_filter_entries
,
3976 &priv
->synopsys_id
);
3977 } else if (priv
->plat
->has_gmac4
) {
3978 priv
->dev
->priv_flags
|= IFF_UNICAST_FLT
;
3979 mac
= dwmac4_setup(priv
->ioaddr
,
3980 priv
->plat
->multicast_filter_bins
,
3981 priv
->plat
->unicast_filter_entries
,
3982 &priv
->synopsys_id
);
3984 mac
= dwmac100_setup(priv
->ioaddr
, &priv
->synopsys_id
);
3991 /* dwmac-sun8i only work in chain mode */
3992 if (priv
->plat
->has_sun8i
)
3995 /* To use the chained or ring mode */
3996 if (priv
->synopsys_id
>= DWMAC_CORE_4_00
) {
3997 priv
->hw
->mode
= &dwmac4_ring_mode_ops
;
4000 priv
->hw
->mode
= &chain_mode_ops
;
4001 dev_info(priv
->device
, "Chain mode enabled\n");
4002 priv
->mode
= STMMAC_CHAIN_MODE
;
4004 priv
->hw
->mode
= &ring_mode_ops
;
4005 dev_info(priv
->device
, "Ring mode enabled\n");
4006 priv
->mode
= STMMAC_RING_MODE
;
4010 /* Get the HW capability (new GMAC newer than 3.50a) */
4011 priv
->hw_cap_support
= stmmac_get_hw_features(priv
);
4012 if (priv
->hw_cap_support
) {
4013 dev_info(priv
->device
, "DMA HW capability register supported\n");
4015 /* We can override some gmac/dma configuration fields: e.g.
4016 * enh_desc, tx_coe (e.g. that are passed through the
4017 * platform) with the values from the HW capability
4018 * register (if supported).
4020 priv
->plat
->enh_desc
= priv
->dma_cap
.enh_desc
;
4021 priv
->plat
->pmt
= priv
->dma_cap
.pmt_remote_wake_up
;
4022 priv
->hw
->pmt
= priv
->plat
->pmt
;
4024 /* TXCOE doesn't work in thresh DMA mode */
4025 if (priv
->plat
->force_thresh_dma_mode
)
4026 priv
->plat
->tx_coe
= 0;
4028 priv
->plat
->tx_coe
= priv
->dma_cap
.tx_coe
;
4030 /* In case of GMAC4 rx_coe is from HW cap register. */
4031 priv
->plat
->rx_coe
= priv
->dma_cap
.rx_coe
;
4033 if (priv
->dma_cap
.rx_coe_type2
)
4034 priv
->plat
->rx_coe
= STMMAC_RX_COE_TYPE2
;
4035 else if (priv
->dma_cap
.rx_coe_type1
)
4036 priv
->plat
->rx_coe
= STMMAC_RX_COE_TYPE1
;
4039 dev_info(priv
->device
, "No HW DMA feature register supported\n");
4042 /* To use alternate (extended), normal or GMAC4 descriptor structures */
4043 if (priv
->synopsys_id
>= DWMAC_CORE_4_00
)
4044 priv
->hw
->desc
= &dwmac4_desc_ops
;
4046 stmmac_selec_desc_mode(priv
);
4048 if (priv
->plat
->rx_coe
) {
4049 priv
->hw
->rx_csum
= priv
->plat
->rx_coe
;
4050 dev_info(priv
->device
, "RX Checksum Offload Engine supported\n");
4051 if (priv
->synopsys_id
< DWMAC_CORE_4_00
)
4052 dev_info(priv
->device
, "COE Type %d\n", priv
->hw
->rx_csum
);
4054 if (priv
->plat
->tx_coe
)
4055 dev_info(priv
->device
, "TX Checksum insertion supported\n");
4057 if (priv
->plat
->pmt
) {
4058 dev_info(priv
->device
, "Wake-Up On Lan supported\n");
4059 device_set_wakeup_capable(priv
->device
, 1);
4062 if (priv
->dma_cap
.tsoen
)
4063 dev_info(priv
->device
, "TSO supported\n");
4070 * @device: device pointer
4071 * @plat_dat: platform data pointer
4072 * @res: stmmac resource pointer
4073 * Description: this is the main probe function used to
4074 * call the alloc_etherdev, allocate the priv structure.
4076 * returns 0 on success, otherwise errno.
4078 int stmmac_dvr_probe(struct device
*device
,
4079 struct plat_stmmacenet_data
*plat_dat
,
4080 struct stmmac_resources
*res
)
4082 struct net_device
*ndev
= NULL
;
4083 struct stmmac_priv
*priv
;
4087 ndev
= alloc_etherdev_mqs(sizeof(struct stmmac_priv
),
4093 SET_NETDEV_DEV(ndev
, device
);
4095 priv
= netdev_priv(ndev
);
4096 priv
->device
= device
;
4099 stmmac_set_ethtool_ops(ndev
);
4100 priv
->pause
= pause
;
4101 priv
->plat
= plat_dat
;
4102 priv
->ioaddr
= res
->addr
;
4103 priv
->dev
->base_addr
= (unsigned long)res
->addr
;
4105 priv
->dev
->irq
= res
->irq
;
4106 priv
->wol_irq
= res
->wol_irq
;
4107 priv
->lpi_irq
= res
->lpi_irq
;
4110 memcpy(priv
->dev
->dev_addr
, res
->mac
, ETH_ALEN
);
4112 dev_set_drvdata(device
, priv
->dev
);
4114 /* Verify driver arguments */
4115 stmmac_verify_args();
4117 /* Override with kernel parameters if supplied XXX CRS XXX
4118 * this needs to have multiple instances
4120 if ((phyaddr
>= 0) && (phyaddr
<= 31))
4121 priv
->plat
->phy_addr
= phyaddr
;
4123 if (priv
->plat
->stmmac_rst
)
4124 reset_control_deassert(priv
->plat
->stmmac_rst
);
4126 /* Init MAC and get the capabilities */
4127 ret
= stmmac_hw_init(priv
);
4131 /* Configure real RX and TX queues */
4132 netif_set_real_num_rx_queues(ndev
, priv
->plat
->rx_queues_to_use
);
4133 netif_set_real_num_tx_queues(ndev
, priv
->plat
->tx_queues_to_use
);
4135 ndev
->netdev_ops
= &stmmac_netdev_ops
;
4137 ndev
->hw_features
= NETIF_F_SG
| NETIF_F_IP_CSUM
| NETIF_F_IPV6_CSUM
|
4140 if ((priv
->plat
->tso_en
) && (priv
->dma_cap
.tsoen
)) {
4141 ndev
->hw_features
|= NETIF_F_TSO
| NETIF_F_TSO6
;
4143 dev_info(priv
->device
, "TSO feature enabled\n");
4145 ndev
->features
|= ndev
->hw_features
| NETIF_F_HIGHDMA
;
4146 ndev
->watchdog_timeo
= msecs_to_jiffies(watchdog
);
4147 #ifdef STMMAC_VLAN_TAG_USED
4148 /* Both mac100 and gmac support receive VLAN tag detection */
4149 ndev
->features
|= NETIF_F_HW_VLAN_CTAG_RX
;
4151 priv
->msg_enable
= netif_msg_init(debug
, default_msg_level
);
4153 /* MTU range: 46 - hw-specific max */
4154 ndev
->min_mtu
= ETH_ZLEN
- ETH_HLEN
;
4155 if ((priv
->plat
->enh_desc
) || (priv
->synopsys_id
>= DWMAC_CORE_4_00
))
4156 ndev
->max_mtu
= JUMBO_LEN
;
4158 ndev
->max_mtu
= SKB_MAX_HEAD(NET_SKB_PAD
+ NET_IP_ALIGN
);
4159 /* Will not overwrite ndev->max_mtu if plat->maxmtu > ndev->max_mtu
4160 * as well as plat->maxmtu < ndev->min_mtu which is a invalid range.
4162 if ((priv
->plat
->maxmtu
< ndev
->max_mtu
) &&
4163 (priv
->plat
->maxmtu
>= ndev
->min_mtu
))
4164 ndev
->max_mtu
= priv
->plat
->maxmtu
;
4165 else if (priv
->plat
->maxmtu
< ndev
->min_mtu
)
4166 dev_warn(priv
->device
,
4167 "%s: warning: maxmtu having invalid value (%d)\n",
4168 __func__
, priv
->plat
->maxmtu
);
4171 priv
->flow_ctrl
= FLOW_AUTO
; /* RX/TX pause on */
4173 /* Rx Watchdog is available in the COREs newer than the 3.40.
4174 * In some case, for example on bugged HW this feature
4175 * has to be disable and this can be done by passing the
4176 * riwt_off field from the platform.
4178 if ((priv
->synopsys_id
>= DWMAC_CORE_3_50
) && (!priv
->plat
->riwt_off
)) {
4180 dev_info(priv
->device
,
4181 "Enable RX Mitigation via HW Watchdog Timer\n");
4184 for (queue
= 0; queue
< priv
->plat
->rx_queues_to_use
; queue
++) {
4185 struct stmmac_rx_queue
*rx_q
= &priv
->rx_queue
[queue
];
4187 netif_napi_add(ndev
, &rx_q
->napi
, stmmac_poll
,
4188 (8 * priv
->plat
->rx_queues_to_use
));
4191 spin_lock_init(&priv
->lock
);
4193 /* If a specific clk_csr value is passed from the platform
4194 * this means that the CSR Clock Range selection cannot be
4195 * changed at run-time and it is fixed. Viceversa the driver'll try to
4196 * set the MDC clock dynamically according to the csr actual
4199 if (!priv
->plat
->clk_csr
)
4200 stmmac_clk_csr_set(priv
);
4202 priv
->clk_csr
= priv
->plat
->clk_csr
;
4204 stmmac_check_pcs_mode(priv
);
4206 if (priv
->hw
->pcs
!= STMMAC_PCS_RGMII
&&
4207 priv
->hw
->pcs
!= STMMAC_PCS_TBI
&&
4208 priv
->hw
->pcs
!= STMMAC_PCS_RTBI
) {
4209 /* MDIO bus Registration */
4210 ret
= stmmac_mdio_register(ndev
);
4212 dev_err(priv
->device
,
4213 "%s: MDIO bus (id: %d) registration failed",
4214 __func__
, priv
->plat
->bus_id
);
4215 goto error_mdio_register
;
4219 ret
= register_netdev(ndev
);
4221 dev_err(priv
->device
, "%s: ERROR %i registering the device\n",
4223 goto error_netdev_register
;
4228 error_netdev_register
:
4229 if (priv
->hw
->pcs
!= STMMAC_PCS_RGMII
&&
4230 priv
->hw
->pcs
!= STMMAC_PCS_TBI
&&
4231 priv
->hw
->pcs
!= STMMAC_PCS_RTBI
)
4232 stmmac_mdio_unregister(ndev
);
4233 error_mdio_register
:
4234 for (queue
= 0; queue
< priv
->plat
->rx_queues_to_use
; queue
++) {
4235 struct stmmac_rx_queue
*rx_q
= &priv
->rx_queue
[queue
];
4237 netif_napi_del(&rx_q
->napi
);
4244 EXPORT_SYMBOL_GPL(stmmac_dvr_probe
);
4248 * @dev: device pointer
4249 * Description: this function resets the TX/RX processes, disables the MAC RX/TX
4250 * changes the link status, releases the DMA descriptor rings.
4252 int stmmac_dvr_remove(struct device
*dev
)
4254 struct net_device
*ndev
= dev_get_drvdata(dev
);
4255 struct stmmac_priv
*priv
= netdev_priv(ndev
);
4257 netdev_info(priv
->dev
, "%s: removing driver", __func__
);
4259 stmmac_stop_all_dma(priv
);
4261 priv
->hw
->mac
->set_mac(priv
->ioaddr
, false);
4262 netif_carrier_off(ndev
);
4263 unregister_netdev(ndev
);
4264 if (priv
->plat
->stmmac_rst
)
4265 reset_control_assert(priv
->plat
->stmmac_rst
);
4266 clk_disable_unprepare(priv
->plat
->pclk
);
4267 clk_disable_unprepare(priv
->plat
->stmmac_clk
);
4268 if (priv
->hw
->pcs
!= STMMAC_PCS_RGMII
&&
4269 priv
->hw
->pcs
!= STMMAC_PCS_TBI
&&
4270 priv
->hw
->pcs
!= STMMAC_PCS_RTBI
)
4271 stmmac_mdio_unregister(ndev
);
4276 EXPORT_SYMBOL_GPL(stmmac_dvr_remove
);
4279 * stmmac_suspend - suspend callback
4280 * @dev: device pointer
4281 * Description: this is the function to suspend the device and it is called
4282 * by the platform driver to stop the network queue, release the resources,
4283 * program the PMT register (for WoL), clean and release driver resources.
4285 int stmmac_suspend(struct device
*dev
)
4287 struct net_device
*ndev
= dev_get_drvdata(dev
);
4288 struct stmmac_priv
*priv
= netdev_priv(ndev
);
4289 unsigned long flags
;
4291 if (!ndev
|| !netif_running(ndev
))
4295 phy_stop(ndev
->phydev
);
4297 spin_lock_irqsave(&priv
->lock
, flags
);
4299 netif_device_detach(ndev
);
4300 stmmac_stop_all_queues(priv
);
4302 stmmac_disable_all_queues(priv
);
4304 /* Stop TX/RX DMA */
4305 stmmac_stop_all_dma(priv
);
4307 /* Enable Power down mode by programming the PMT regs */
4308 if (device_may_wakeup(priv
->device
)) {
4309 priv
->hw
->mac
->pmt(priv
->hw
, priv
->wolopts
);
4312 priv
->hw
->mac
->set_mac(priv
->ioaddr
, false);
4313 pinctrl_pm_select_sleep_state(priv
->device
);
4314 /* Disable clock in case of PWM is off */
4315 clk_disable(priv
->plat
->pclk
);
4316 clk_disable(priv
->plat
->stmmac_clk
);
4318 spin_unlock_irqrestore(&priv
->lock
, flags
);
4320 priv
->oldlink
= false;
4321 priv
->speed
= SPEED_UNKNOWN
;
4322 priv
->oldduplex
= DUPLEX_UNKNOWN
;
4325 EXPORT_SYMBOL_GPL(stmmac_suspend
);
4328 * stmmac_reset_queues_param - reset queue parameters
4329 * @dev: device pointer
4331 static void stmmac_reset_queues_param(struct stmmac_priv
*priv
)
4333 u32 rx_cnt
= priv
->plat
->rx_queues_to_use
;
4334 u32 tx_cnt
= priv
->plat
->tx_queues_to_use
;
4337 for (queue
= 0; queue
< rx_cnt
; queue
++) {
4338 struct stmmac_rx_queue
*rx_q
= &priv
->rx_queue
[queue
];
4344 for (queue
= 0; queue
< tx_cnt
; queue
++) {
4345 struct stmmac_tx_queue
*tx_q
= &priv
->tx_queue
[queue
];
4353 * stmmac_resume - resume callback
4354 * @dev: device pointer
4355 * Description: when resume this function is invoked to setup the DMA and CORE
4356 * in a usable state.
4358 int stmmac_resume(struct device
*dev
)
4360 struct net_device
*ndev
= dev_get_drvdata(dev
);
4361 struct stmmac_priv
*priv
= netdev_priv(ndev
);
4362 unsigned long flags
;
4364 if (!netif_running(ndev
))
4367 /* Power Down bit, into the PM register, is cleared
4368 * automatically as soon as a magic packet or a Wake-up frame
4369 * is received. Anyway, it's better to manually clear
4370 * this bit because it can generate problems while resuming
4371 * from another devices (e.g. serial console).
4373 if (device_may_wakeup(priv
->device
)) {
4374 spin_lock_irqsave(&priv
->lock
, flags
);
4375 priv
->hw
->mac
->pmt(priv
->hw
, 0);
4376 spin_unlock_irqrestore(&priv
->lock
, flags
);
4379 pinctrl_pm_select_default_state(priv
->device
);
4380 /* enable the clk previously disabled */
4381 clk_enable(priv
->plat
->stmmac_clk
);
4382 clk_enable(priv
->plat
->pclk
);
4383 /* reset the phy so that it's ready */
4385 stmmac_mdio_reset(priv
->mii
);
4388 netif_device_attach(ndev
);
4390 spin_lock_irqsave(&priv
->lock
, flags
);
4392 stmmac_reset_queues_param(priv
);
4394 /* reset private mss value to force mss context settings at
4395 * next tso xmit (only used for gmac4).
4399 stmmac_clear_descriptors(priv
);
4401 stmmac_hw_setup(ndev
, false);
4402 stmmac_init_tx_coalesce(priv
);
4403 stmmac_set_rx_mode(ndev
);
4405 stmmac_enable_all_queues(priv
);
4407 stmmac_start_all_queues(priv
);
4409 spin_unlock_irqrestore(&priv
->lock
, flags
);
4412 phy_start(ndev
->phydev
);
4416 EXPORT_SYMBOL_GPL(stmmac_resume
);
4419 static int __init
stmmac_cmdline_opt(char *str
)
4425 while ((opt
= strsep(&str
, ",")) != NULL
) {
4426 if (!strncmp(opt
, "debug:", 6)) {
4427 if (kstrtoint(opt
+ 6, 0, &debug
))
4429 } else if (!strncmp(opt
, "phyaddr:", 8)) {
4430 if (kstrtoint(opt
+ 8, 0, &phyaddr
))
4432 } else if (!strncmp(opt
, "buf_sz:", 7)) {
4433 if (kstrtoint(opt
+ 7, 0, &buf_sz
))
4435 } else if (!strncmp(opt
, "tc:", 3)) {
4436 if (kstrtoint(opt
+ 3, 0, &tc
))
4438 } else if (!strncmp(opt
, "watchdog:", 9)) {
4439 if (kstrtoint(opt
+ 9, 0, &watchdog
))
4441 } else if (!strncmp(opt
, "flow_ctrl:", 10)) {
4442 if (kstrtoint(opt
+ 10, 0, &flow_ctrl
))
4444 } else if (!strncmp(opt
, "pause:", 6)) {
4445 if (kstrtoint(opt
+ 6, 0, &pause
))
4447 } else if (!strncmp(opt
, "eee_timer:", 10)) {
4448 if (kstrtoint(opt
+ 10, 0, &eee_timer
))
4450 } else if (!strncmp(opt
, "chain_mode:", 11)) {
4451 if (kstrtoint(opt
+ 11, 0, &chain_mode
))
4458 pr_err("%s: ERROR broken module parameter conversion", __func__
);
4462 __setup("stmmaceth=", stmmac_cmdline_opt
);
4465 static int __init
stmmac_init(void)
4467 #ifdef CONFIG_DEBUG_FS
4468 /* Create debugfs main directory if it doesn't exist yet */
4469 if (!stmmac_fs_dir
) {
4470 stmmac_fs_dir
= debugfs_create_dir(STMMAC_RESOURCE_NAME
, NULL
);
4472 if (!stmmac_fs_dir
|| IS_ERR(stmmac_fs_dir
)) {
4473 pr_err("ERROR %s, debugfs create directory failed\n",
4474 STMMAC_RESOURCE_NAME
);
4484 static void __exit
stmmac_exit(void)
4486 #ifdef CONFIG_DEBUG_FS
4487 debugfs_remove_recursive(stmmac_fs_dir
);
4491 module_init(stmmac_init
)
4492 module_exit(stmmac_exit
)
4494 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet device driver");
4495 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
4496 MODULE_LICENSE("GPL");