2 * Driver for Marvell NETA network card for Armada XP and Armada 370 SoCs.
4 * Copyright (C) 2012 Marvell
6 * Rami Rosen <rosenr@marvell.com>
7 * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
9 * This file is licensed under the terms of the GNU General Public
10 * License version 2. This program is licensed "as is" without any
11 * warranty of any kind, whether express or implied.
14 #include <linux/kernel.h>
15 #include <linux/netdevice.h>
16 #include <linux/etherdevice.h>
17 #include <linux/platform_device.h>
18 #include <linux/skbuff.h>
19 #include <linux/inetdevice.h>
20 #include <linux/mbus.h>
21 #include <linux/module.h>
22 #include <linux/interrupt.h>
28 #include <linux/of_irq.h>
29 #include <linux/of_mdio.h>
30 #include <linux/of_net.h>
31 #include <linux/of_address.h>
32 #include <linux/phy.h>
33 #include <linux/clk.h>
36 #define MVNETA_RXQ_CONFIG_REG(q) (0x1400 + ((q) << 2))
37 #define MVNETA_RXQ_HW_BUF_ALLOC BIT(1)
38 #define MVNETA_RXQ_PKT_OFFSET_ALL_MASK (0xf << 8)
39 #define MVNETA_RXQ_PKT_OFFSET_MASK(offs) ((offs) << 8)
40 #define MVNETA_RXQ_THRESHOLD_REG(q) (0x14c0 + ((q) << 2))
41 #define MVNETA_RXQ_NON_OCCUPIED(v) ((v) << 16)
42 #define MVNETA_RXQ_BASE_ADDR_REG(q) (0x1480 + ((q) << 2))
43 #define MVNETA_RXQ_SIZE_REG(q) (0x14a0 + ((q) << 2))
44 #define MVNETA_RXQ_BUF_SIZE_SHIFT 19
45 #define MVNETA_RXQ_BUF_SIZE_MASK (0x1fff << 19)
46 #define MVNETA_RXQ_STATUS_REG(q) (0x14e0 + ((q) << 2))
47 #define MVNETA_RXQ_OCCUPIED_ALL_MASK 0x3fff
48 #define MVNETA_RXQ_STATUS_UPDATE_REG(q) (0x1500 + ((q) << 2))
49 #define MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT 16
50 #define MVNETA_RXQ_ADD_NON_OCCUPIED_MAX 255
51 #define MVNETA_PORT_RX_RESET 0x1cc0
52 #define MVNETA_PORT_RX_DMA_RESET BIT(0)
53 #define MVNETA_PHY_ADDR 0x2000
54 #define MVNETA_PHY_ADDR_MASK 0x1f
55 #define MVNETA_MBUS_RETRY 0x2010
56 #define MVNETA_UNIT_INTR_CAUSE 0x2080
57 #define MVNETA_UNIT_CONTROL 0x20B0
58 #define MVNETA_PHY_POLLING_ENABLE BIT(1)
59 #define MVNETA_WIN_BASE(w) (0x2200 + ((w) << 3))
60 #define MVNETA_WIN_SIZE(w) (0x2204 + ((w) << 3))
61 #define MVNETA_WIN_REMAP(w) (0x2280 + ((w) << 2))
62 #define MVNETA_BASE_ADDR_ENABLE 0x2290
63 #define MVNETA_PORT_CONFIG 0x2400
64 #define MVNETA_UNI_PROMISC_MODE BIT(0)
65 #define MVNETA_DEF_RXQ(q) ((q) << 1)
66 #define MVNETA_DEF_RXQ_ARP(q) ((q) << 4)
67 #define MVNETA_TX_UNSET_ERR_SUM BIT(12)
68 #define MVNETA_DEF_RXQ_TCP(q) ((q) << 16)
69 #define MVNETA_DEF_RXQ_UDP(q) ((q) << 19)
70 #define MVNETA_DEF_RXQ_BPDU(q) ((q) << 22)
71 #define MVNETA_RX_CSUM_WITH_PSEUDO_HDR BIT(25)
72 #define MVNETA_PORT_CONFIG_DEFL_VALUE(q) (MVNETA_DEF_RXQ(q) | \
73 MVNETA_DEF_RXQ_ARP(q) | \
74 MVNETA_DEF_RXQ_TCP(q) | \
75 MVNETA_DEF_RXQ_UDP(q) | \
76 MVNETA_DEF_RXQ_BPDU(q) | \
77 MVNETA_TX_UNSET_ERR_SUM | \
78 MVNETA_RX_CSUM_WITH_PSEUDO_HDR)
79 #define MVNETA_PORT_CONFIG_EXTEND 0x2404
80 #define MVNETA_MAC_ADDR_LOW 0x2414
81 #define MVNETA_MAC_ADDR_HIGH 0x2418
82 #define MVNETA_SDMA_CONFIG 0x241c
83 #define MVNETA_SDMA_BRST_SIZE_16 4
84 #define MVNETA_RX_BRST_SZ_MASK(burst) ((burst) << 1)
85 #define MVNETA_RX_NO_DATA_SWAP BIT(4)
86 #define MVNETA_TX_NO_DATA_SWAP BIT(5)
87 #define MVNETA_DESC_SWAP BIT(6)
88 #define MVNETA_TX_BRST_SZ_MASK(burst) ((burst) << 22)
89 #define MVNETA_PORT_STATUS 0x2444
90 #define MVNETA_TX_IN_PRGRS BIT(1)
91 #define MVNETA_TX_FIFO_EMPTY BIT(8)
92 #define MVNETA_RX_MIN_FRAME_SIZE 0x247c
93 #define MVNETA_SERDES_CFG 0x24A0
94 #define MVNETA_SGMII_SERDES_PROTO 0x0cc7
95 #define MVNETA_QSGMII_SERDES_PROTO 0x0667
96 #define MVNETA_TYPE_PRIO 0x24bc
97 #define MVNETA_FORCE_UNI BIT(21)
98 #define MVNETA_TXQ_CMD_1 0x24e4
99 #define MVNETA_TXQ_CMD 0x2448
100 #define MVNETA_TXQ_DISABLE_SHIFT 8
101 #define MVNETA_TXQ_ENABLE_MASK 0x000000ff
102 #define MVNETA_ACC_MODE 0x2500
103 #define MVNETA_CPU_MAP(cpu) (0x2540 + ((cpu) << 2))
104 #define MVNETA_CPU_RXQ_ACCESS_ALL_MASK 0x000000ff
105 #define MVNETA_CPU_TXQ_ACCESS_ALL_MASK 0x0000ff00
106 #define MVNETA_RXQ_TIME_COAL_REG(q) (0x2580 + ((q) << 2))
108 /* Exception Interrupt Port/Queue Cause register */
110 #define MVNETA_INTR_NEW_CAUSE 0x25a0
111 #define MVNETA_INTR_NEW_MASK 0x25a4
113 /* bits 0..7 = TXQ SENT, one bit per queue.
114 * bits 8..15 = RXQ OCCUP, one bit per queue.
115 * bits 16..23 = RXQ FREE, one bit per queue.
116 * bit 29 = OLD_REG_SUM, see old reg ?
117 * bit 30 = TX_ERR_SUM, one bit for 4 ports
118 * bit 31 = MISC_SUM, one bit for 4 ports
120 #define MVNETA_TX_INTR_MASK(nr_txqs) (((1 << nr_txqs) - 1) << 0)
121 #define MVNETA_TX_INTR_MASK_ALL (0xff << 0)
122 #define MVNETA_RX_INTR_MASK(nr_rxqs) (((1 << nr_rxqs) - 1) << 8)
123 #define MVNETA_RX_INTR_MASK_ALL (0xff << 8)
125 #define MVNETA_INTR_OLD_CAUSE 0x25a8
126 #define MVNETA_INTR_OLD_MASK 0x25ac
128 /* Data Path Port/Queue Cause Register */
129 #define MVNETA_INTR_MISC_CAUSE 0x25b0
130 #define MVNETA_INTR_MISC_MASK 0x25b4
132 #define MVNETA_CAUSE_PHY_STATUS_CHANGE BIT(0)
133 #define MVNETA_CAUSE_LINK_CHANGE BIT(1)
134 #define MVNETA_CAUSE_PTP BIT(4)
136 #define MVNETA_CAUSE_INTERNAL_ADDR_ERR BIT(7)
137 #define MVNETA_CAUSE_RX_OVERRUN BIT(8)
138 #define MVNETA_CAUSE_RX_CRC_ERROR BIT(9)
139 #define MVNETA_CAUSE_RX_LARGE_PKT BIT(10)
140 #define MVNETA_CAUSE_TX_UNDERUN BIT(11)
141 #define MVNETA_CAUSE_PRBS_ERR BIT(12)
142 #define MVNETA_CAUSE_PSC_SYNC_CHANGE BIT(13)
143 #define MVNETA_CAUSE_SERDES_SYNC_ERR BIT(14)
145 #define MVNETA_CAUSE_BMU_ALLOC_ERR_SHIFT 16
146 #define MVNETA_CAUSE_BMU_ALLOC_ERR_ALL_MASK (0xF << MVNETA_CAUSE_BMU_ALLOC_ERR_SHIFT)
147 #define MVNETA_CAUSE_BMU_ALLOC_ERR_MASK(pool) (1 << (MVNETA_CAUSE_BMU_ALLOC_ERR_SHIFT + (pool)))
149 #define MVNETA_CAUSE_TXQ_ERROR_SHIFT 24
150 #define MVNETA_CAUSE_TXQ_ERROR_ALL_MASK (0xFF << MVNETA_CAUSE_TXQ_ERROR_SHIFT)
151 #define MVNETA_CAUSE_TXQ_ERROR_MASK(q) (1 << (MVNETA_CAUSE_TXQ_ERROR_SHIFT + (q)))
153 #define MVNETA_INTR_ENABLE 0x25b8
154 #define MVNETA_TXQ_INTR_ENABLE_ALL_MASK 0x0000ff00
155 #define MVNETA_RXQ_INTR_ENABLE_ALL_MASK 0xff000000 // note: neta says it's 0x000000FF
157 #define MVNETA_RXQ_CMD 0x2680
158 #define MVNETA_RXQ_DISABLE_SHIFT 8
159 #define MVNETA_RXQ_ENABLE_MASK 0x000000ff
160 #define MVETH_TXQ_TOKEN_COUNT_REG(q) (0x2700 + ((q) << 4))
161 #define MVETH_TXQ_TOKEN_CFG_REG(q) (0x2704 + ((q) << 4))
162 #define MVNETA_GMAC_CTRL_0 0x2c00
163 #define MVNETA_GMAC_MAX_RX_SIZE_SHIFT 2
164 #define MVNETA_GMAC_MAX_RX_SIZE_MASK 0x7ffc
165 #define MVNETA_GMAC0_PORT_ENABLE BIT(0)
166 #define MVNETA_GMAC_CTRL_2 0x2c08
167 #define MVNETA_GMAC2_PCS_ENABLE BIT(3)
168 #define MVNETA_GMAC2_PORT_RGMII BIT(4)
169 #define MVNETA_GMAC2_PORT_RESET BIT(6)
170 #define MVNETA_GMAC_STATUS 0x2c10
171 #define MVNETA_GMAC_LINK_UP BIT(0)
172 #define MVNETA_GMAC_SPEED_1000 BIT(1)
173 #define MVNETA_GMAC_SPEED_100 BIT(2)
174 #define MVNETA_GMAC_FULL_DUPLEX BIT(3)
175 #define MVNETA_GMAC_RX_FLOW_CTRL_ENABLE BIT(4)
176 #define MVNETA_GMAC_TX_FLOW_CTRL_ENABLE BIT(5)
177 #define MVNETA_GMAC_RX_FLOW_CTRL_ACTIVE BIT(6)
178 #define MVNETA_GMAC_TX_FLOW_CTRL_ACTIVE BIT(7)
179 #define MVNETA_GMAC_AUTONEG_CONFIG 0x2c0c
180 #define MVNETA_GMAC_FORCE_LINK_DOWN BIT(0)
181 #define MVNETA_GMAC_FORCE_LINK_PASS BIT(1)
182 #define MVNETA_GMAC_CONFIG_MII_SPEED BIT(5)
183 #define MVNETA_GMAC_CONFIG_GMII_SPEED BIT(6)
184 #define MVNETA_GMAC_AN_SPEED_EN BIT(7)
185 #define MVNETA_GMAC_CONFIG_FULL_DUPLEX BIT(12)
186 #define MVNETA_GMAC_AN_DUPLEX_EN BIT(13)
187 #define MVNETA_MIB_COUNTERS_BASE 0x3080
188 #define MVNETA_MIB_LATE_COLLISION 0x7c
189 #define MVNETA_DA_FILT_SPEC_MCAST 0x3400
190 #define MVNETA_DA_FILT_OTH_MCAST 0x3500
191 #define MVNETA_DA_FILT_UCAST_BASE 0x3600
192 #define MVNETA_TXQ_BASE_ADDR_REG(q) (0x3c00 + ((q) << 2))
193 #define MVNETA_TXQ_SIZE_REG(q) (0x3c20 + ((q) << 2))
194 #define MVNETA_TXQ_SENT_THRESH_ALL_MASK 0x3fff0000
195 #define MVNETA_TXQ_SENT_THRESH_MASK(coal) ((coal) << 16)
196 #define MVNETA_TXQ_UPDATE_REG(q) (0x3c60 + ((q) << 2))
197 #define MVNETA_TXQ_DEC_SENT_SHIFT 16
198 #define MVNETA_TXQ_STATUS_REG(q) (0x3c40 + ((q) << 2))
199 #define MVNETA_TXQ_SENT_DESC_SHIFT 16
200 #define MVNETA_TXQ_SENT_DESC_MASK 0x3fff0000
201 #define MVNETA_PORT_TX_RESET 0x3cf0
202 #define MVNETA_PORT_TX_DMA_RESET BIT(0)
203 #define MVNETA_TX_MTU 0x3e0c
204 #define MVNETA_TX_TOKEN_SIZE 0x3e14
205 #define MVNETA_TX_TOKEN_SIZE_MAX 0xffffffff
206 #define MVNETA_TXQ_TOKEN_SIZE_REG(q) (0x3e40 + ((q) << 2))
207 #define MVNETA_TXQ_TOKEN_SIZE_MAX 0x7fffffff
209 #define MVNETA_CAUSE_TXQ_SENT_DESC_ALL_MASK 0xff
211 /* Descriptor ring Macros */
212 #define MVNETA_QUEUE_NEXT_DESC(q, index) \
213 (((index) < (q)->last_desc) ? ((index) + 1) : 0)
215 /* Various constants */
218 #define MVNETA_TXDONE_COAL_PKTS 16
219 #define MVNETA_RX_COAL_PKTS 32
220 #define MVNETA_RX_COAL_USEC 100
222 /* The two bytes Marvell header. Either contains a special value used
223 * by Marvell switches when a specific hardware mode is enabled (not
224 * supported by this driver) or is filled automatically by zeroes on
225 * the RX side. Those two bytes being at the front of the Ethernet
226 * header, they allow to have the IP header aligned on a 4 bytes
227 * boundary automatically: the hardware skips those two bytes on its
230 #define MVNETA_MH_SIZE 2
232 #define MVNETA_VLAN_TAG_LEN 4
234 #define MVNETA_CPU_D_CACHE_LINE_SIZE 32
235 #define MVNETA_TX_CSUM_MAX_SIZE 9800
236 #define MVNETA_ACC_MODE_EXT 1
238 /* Timeout constants */
239 #define MVNETA_TX_DISABLE_TIMEOUT_MSEC 1000
240 #define MVNETA_RX_DISABLE_TIMEOUT_MSEC 1000
241 #define MVNETA_TX_FIFO_EMPTY_TIMEOUT 10000
243 #define MVNETA_TX_MTU_MAX 0x3ffff
245 /* TSO header size */
246 #define TSO_HEADER_SIZE 128
248 /* Max number of Rx descriptors */
249 #define MVNETA_MAX_RXD 128
251 /* Max number of Tx descriptors */
252 #define MVNETA_MAX_TXD 532
254 /* descriptor aligned size */
255 #define MVNETA_DESC_ALIGNED_SIZE 32
257 #define MVNETA_RX_PKT_SIZE(mtu) \
258 ALIGN((mtu) + MVNETA_MH_SIZE + MVNETA_VLAN_TAG_LEN + \
259 ETH_HLEN + ETH_FCS_LEN, \
260 MVNETA_CPU_D_CACHE_LINE_SIZE)
262 #define MVNETA_RX_BUF_SIZE(pkt_size) ((pkt_size) + NET_SKB_PAD)
264 struct mvneta_pcpu_stats {
265 struct u64_stats_sync syncp;
274 unsigned int frag_size;
276 struct mvneta_rx_queue *rxqs;
277 struct mvneta_tx_queue *txqs;
278 struct net_device *dev;
281 struct napi_struct napi;
288 struct mvneta_pcpu_stats *stats;
290 struct mii_bus *mii_bus;
291 struct phy_device *phy_dev;
292 phy_interface_t phy_interface;
293 struct device_node *phy_node;
299 /* The mvneta_tx_desc and mvneta_rx_desc structures describe the
300 * layout of the transmit and reception DMA descriptors, and their
301 * layout is therefore defined by the hardware design
304 #define MVNETA_TX_L3_OFF_SHIFT 0
305 #define MVNETA_TX_IP_HLEN_SHIFT 8
306 #define MVNETA_TX_L4_UDP BIT(16)
307 #define MVNETA_TX_L3_IP6 BIT(17)
308 #define MVNETA_TXD_IP_CSUM BIT(18)
309 #define MVNETA_TXD_Z_PAD BIT(19)
310 #define MVNETA_TXD_L_DESC BIT(20)
311 #define MVNETA_TXD_F_DESC BIT(21)
312 #define MVNETA_TXD_FLZ_DESC (MVNETA_TXD_Z_PAD | \
313 MVNETA_TXD_L_DESC | \
315 #define MVNETA_TX_L4_CSUM_FULL BIT(30)
316 #define MVNETA_TX_L4_CSUM_NOT BIT(31)
318 #define MVNETA_RXD_ERR_CRC 0x0
319 #define MVNETA_RXD_ERR_SUMMARY BIT(16)
320 #define MVNETA_RXD_ERR_OVERRUN BIT(17)
321 #define MVNETA_RXD_ERR_LEN BIT(18)
322 #define MVNETA_RXD_ERR_RESOURCE (BIT(17) | BIT(18))
323 #define MVNETA_RXD_ERR_CODE_MASK (BIT(17) | BIT(18))
324 #define MVNETA_RXD_L3_IP4 BIT(25)
325 #define MVNETA_RXD_FIRST_LAST_DESC (BIT(26) | BIT(27))
326 #define MVNETA_RXD_L4_CSUM_OK BIT(30)
328 #if defined(__LITTLE_ENDIAN)
329 struct mvneta_tx_desc {
330 u32 command; /* Options used by HW for packet transmitting.*/
331 u16 reserverd1; /* csum_l4 (for future use) */
332 u16 data_size; /* Data size of transmitted packet in bytes */
333 u32 buf_phys_addr; /* Physical addr of transmitted buffer */
334 u32 reserved2; /* hw_cmd - (for future use, PMT) */
335 u32 reserved3[4]; /* Reserved - (for future use) */
338 struct mvneta_rx_desc {
339 u32 status; /* Info about received packet */
340 u16 reserved1; /* pnc_info - (for future use, PnC) */
341 u16 data_size; /* Size of received packet in bytes */
343 u32 buf_phys_addr; /* Physical address of the buffer */
344 u32 reserved2; /* pnc_flow_id (for future use, PnC) */
346 u32 buf_cookie; /* cookie for access to RX buffer in rx path */
347 u16 reserved3; /* prefetch_cmd, for future use */
348 u16 reserved4; /* csum_l4 - (for future use, PnC) */
350 u32 reserved5; /* pnc_extra PnC (for future use, PnC) */
351 u32 reserved6; /* hw_cmd (for future use, PnC and HWF) */
354 struct mvneta_tx_desc {
355 u16 data_size; /* Data size of transmitted packet in bytes */
356 u16 reserverd1; /* csum_l4 (for future use) */
357 u32 command; /* Options used by HW for packet transmitting.*/
358 u32 reserved2; /* hw_cmd - (for future use, PMT) */
359 u32 buf_phys_addr; /* Physical addr of transmitted buffer */
360 u32 reserved3[4]; /* Reserved - (for future use) */
363 struct mvneta_rx_desc {
364 u16 data_size; /* Size of received packet in bytes */
365 u16 reserved1; /* pnc_info - (for future use, PnC) */
366 u32 status; /* Info about received packet */
368 u32 reserved2; /* pnc_flow_id (for future use, PnC) */
369 u32 buf_phys_addr; /* Physical address of the buffer */
371 u16 reserved4; /* csum_l4 - (for future use, PnC) */
372 u16 reserved3; /* prefetch_cmd, for future use */
373 u32 buf_cookie; /* cookie for access to RX buffer in rx path */
375 u32 reserved5; /* pnc_extra PnC (for future use, PnC) */
376 u32 reserved6; /* hw_cmd (for future use, PnC and HWF) */
380 struct mvneta_tx_queue {
381 /* Number of this TX queue, in the range 0-7 */
384 /* Number of TX DMA descriptors in the descriptor ring */
387 /* Number of currently used TX DMA descriptor in the
392 /* Array of transmitted skb */
393 struct sk_buff **tx_skb;
395 /* Index of last TX DMA descriptor that was inserted */
398 /* Index of the TX DMA descriptor to be cleaned up */
403 /* Virtual address of the TX DMA descriptors array */
404 struct mvneta_tx_desc *descs;
406 /* DMA address of the TX DMA descriptors array */
407 dma_addr_t descs_phys;
409 /* Index of the last TX DMA descriptor */
412 /* Index of the next TX DMA descriptor to process */
413 int next_desc_to_proc;
415 /* DMA buffers for TSO headers */
418 /* DMA address of TSO headers */
419 dma_addr_t tso_hdrs_phys;
422 struct mvneta_rx_queue {
423 /* rx queue number, in the range 0-7 */
426 /* num of rx descriptors in the rx descriptor ring */
429 /* counter of times when mvneta_refill() failed */
435 /* Virtual address of the RX DMA descriptors array */
436 struct mvneta_rx_desc *descs;
438 /* DMA address of the RX DMA descriptors array */
439 dma_addr_t descs_phys;
441 /* Index of the last RX DMA descriptor */
444 /* Index of the next RX DMA descriptor to process */
445 int next_desc_to_proc;
448 /* The hardware supports eight (8) rx queues, but we are only allowing
449 * the first one to be used. Therefore, let's just allocate one queue.
451 static int rxq_number = 1;
452 static int txq_number = 8;
456 static int rx_copybreak __read_mostly = 256;
458 #define MVNETA_DRIVER_NAME "mvneta"
459 #define MVNETA_DRIVER_VERSION "1.0"
461 /* Utility/helper methods */
463 /* Write helper method */
464 static void mvreg_write(struct mvneta_port *pp, u32 offset, u32 data)
466 writel(data, pp->base + offset);
469 /* Read helper method */
470 static u32 mvreg_read(struct mvneta_port *pp, u32 offset)
472 return readl(pp->base + offset);
475 /* Increment txq get counter */
476 static void mvneta_txq_inc_get(struct mvneta_tx_queue *txq)
478 txq->txq_get_index++;
479 if (txq->txq_get_index == txq->size)
480 txq->txq_get_index = 0;
483 /* Increment txq put counter */
484 static void mvneta_txq_inc_put(struct mvneta_tx_queue *txq)
486 txq->txq_put_index++;
487 if (txq->txq_put_index == txq->size)
488 txq->txq_put_index = 0;
492 /* Clear all MIB counters */
493 static void mvneta_mib_counters_clear(struct mvneta_port *pp)
498 /* Perform dummy reads from MIB counters */
499 for (i = 0; i < MVNETA_MIB_LATE_COLLISION; i += 4)
500 dummy = mvreg_read(pp, (MVNETA_MIB_COUNTERS_BASE + i));
503 /* Get System Network Statistics */
504 struct rtnl_link_stats64 *mvneta_get_stats64(struct net_device *dev,
505 struct rtnl_link_stats64 *stats)
507 struct mvneta_port *pp = netdev_priv(dev);
511 for_each_possible_cpu(cpu) {
512 struct mvneta_pcpu_stats *cpu_stats;
518 cpu_stats = per_cpu_ptr(pp->stats, cpu);
520 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
521 rx_packets = cpu_stats->rx_packets;
522 rx_bytes = cpu_stats->rx_bytes;
523 tx_packets = cpu_stats->tx_packets;
524 tx_bytes = cpu_stats->tx_bytes;
525 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
527 stats->rx_packets += rx_packets;
528 stats->rx_bytes += rx_bytes;
529 stats->tx_packets += tx_packets;
530 stats->tx_bytes += tx_bytes;
533 stats->rx_errors = dev->stats.rx_errors;
534 stats->rx_dropped = dev->stats.rx_dropped;
536 stats->tx_dropped = dev->stats.tx_dropped;
541 /* Rx descriptors helper methods */
543 /* Checks whether the RX descriptor having this status is both the first
544 * and the last descriptor for the RX packet. Each RX packet is currently
545 * received through a single RX descriptor, so not having each RX
546 * descriptor with its first and last bits set is an error
548 static int mvneta_rxq_desc_is_first_last(u32 status)
550 return (status & MVNETA_RXD_FIRST_LAST_DESC) ==
551 MVNETA_RXD_FIRST_LAST_DESC;
554 /* Add number of descriptors ready to receive new packets */
555 static void mvneta_rxq_non_occup_desc_add(struct mvneta_port *pp,
556 struct mvneta_rx_queue *rxq,
559 /* Only MVNETA_RXQ_ADD_NON_OCCUPIED_MAX (255) descriptors can
562 while (ndescs > MVNETA_RXQ_ADD_NON_OCCUPIED_MAX) {
563 mvreg_write(pp, MVNETA_RXQ_STATUS_UPDATE_REG(rxq->id),
564 (MVNETA_RXQ_ADD_NON_OCCUPIED_MAX <<
565 MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT));
566 ndescs -= MVNETA_RXQ_ADD_NON_OCCUPIED_MAX;
569 mvreg_write(pp, MVNETA_RXQ_STATUS_UPDATE_REG(rxq->id),
570 (ndescs << MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT));
573 /* Get number of RX descriptors occupied by received packets */
574 static int mvneta_rxq_busy_desc_num_get(struct mvneta_port *pp,
575 struct mvneta_rx_queue *rxq)
579 val = mvreg_read(pp, MVNETA_RXQ_STATUS_REG(rxq->id));
580 return val & MVNETA_RXQ_OCCUPIED_ALL_MASK;
583 /* Update num of rx desc called upon return from rx path or
584 * from mvneta_rxq_drop_pkts().
586 static void mvneta_rxq_desc_num_update(struct mvneta_port *pp,
587 struct mvneta_rx_queue *rxq,
588 int rx_done, int rx_filled)
592 if ((rx_done <= 0xff) && (rx_filled <= 0xff)) {
594 (rx_filled << MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT);
595 mvreg_write(pp, MVNETA_RXQ_STATUS_UPDATE_REG(rxq->id), val);
599 /* Only 255 descriptors can be added at once */
600 while ((rx_done > 0) || (rx_filled > 0)) {
601 if (rx_done <= 0xff) {
608 if (rx_filled <= 0xff) {
609 val |= rx_filled << MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT;
612 val |= 0xff << MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT;
615 mvreg_write(pp, MVNETA_RXQ_STATUS_UPDATE_REG(rxq->id), val);
619 /* Get pointer to next RX descriptor to be processed by SW */
620 static struct mvneta_rx_desc *
621 mvneta_rxq_next_desc_get(struct mvneta_rx_queue *rxq)
623 int rx_desc = rxq->next_desc_to_proc;
625 rxq->next_desc_to_proc = MVNETA_QUEUE_NEXT_DESC(rxq, rx_desc);
626 prefetch(rxq->descs + rxq->next_desc_to_proc);
627 return rxq->descs + rx_desc;
630 /* Change maximum receive size of the port. */
631 static void mvneta_max_rx_size_set(struct mvneta_port *pp, int max_rx_size)
635 val = mvreg_read(pp, MVNETA_GMAC_CTRL_0);
636 val &= ~MVNETA_GMAC_MAX_RX_SIZE_MASK;
637 val |= ((max_rx_size - MVNETA_MH_SIZE) / 2) <<
638 MVNETA_GMAC_MAX_RX_SIZE_SHIFT;
639 mvreg_write(pp, MVNETA_GMAC_CTRL_0, val);
643 /* Set rx queue offset */
644 static void mvneta_rxq_offset_set(struct mvneta_port *pp,
645 struct mvneta_rx_queue *rxq,
650 val = mvreg_read(pp, MVNETA_RXQ_CONFIG_REG(rxq->id));
651 val &= ~MVNETA_RXQ_PKT_OFFSET_ALL_MASK;
654 val |= MVNETA_RXQ_PKT_OFFSET_MASK(offset >> 3);
655 mvreg_write(pp, MVNETA_RXQ_CONFIG_REG(rxq->id), val);
659 /* Tx descriptors helper methods */
661 /* Update HW with number of TX descriptors to be sent */
662 static void mvneta_txq_pend_desc_add(struct mvneta_port *pp,
663 struct mvneta_tx_queue *txq,
668 /* Only 255 descriptors can be added at once ; Assume caller
669 * process TX desriptors in quanta less than 256
672 mvreg_write(pp, MVNETA_TXQ_UPDATE_REG(txq->id), val);
675 /* Get pointer to next TX descriptor to be processed (send) by HW */
676 static struct mvneta_tx_desc *
677 mvneta_txq_next_desc_get(struct mvneta_tx_queue *txq)
679 int tx_desc = txq->next_desc_to_proc;
681 txq->next_desc_to_proc = MVNETA_QUEUE_NEXT_DESC(txq, tx_desc);
682 return txq->descs + tx_desc;
685 /* Release the last allocated TX descriptor. Useful to handle DMA
686 * mapping failures in the TX path.
688 static void mvneta_txq_desc_put(struct mvneta_tx_queue *txq)
690 if (txq->next_desc_to_proc == 0)
691 txq->next_desc_to_proc = txq->last_desc - 1;
693 txq->next_desc_to_proc--;
696 /* Set rxq buf size */
697 static void mvneta_rxq_buf_size_set(struct mvneta_port *pp,
698 struct mvneta_rx_queue *rxq,
703 val = mvreg_read(pp, MVNETA_RXQ_SIZE_REG(rxq->id));
705 val &= ~MVNETA_RXQ_BUF_SIZE_MASK;
706 val |= ((buf_size >> 3) << MVNETA_RXQ_BUF_SIZE_SHIFT);
708 mvreg_write(pp, MVNETA_RXQ_SIZE_REG(rxq->id), val);
711 /* Disable buffer management (BM) */
712 static void mvneta_rxq_bm_disable(struct mvneta_port *pp,
713 struct mvneta_rx_queue *rxq)
717 val = mvreg_read(pp, MVNETA_RXQ_CONFIG_REG(rxq->id));
718 val &= ~MVNETA_RXQ_HW_BUF_ALLOC;
719 mvreg_write(pp, MVNETA_RXQ_CONFIG_REG(rxq->id), val);
722 /* Start the Ethernet port RX and TX activity */
723 static void mvneta_port_up(struct mvneta_port *pp)
728 /* Enable all initialized TXs. */
729 mvneta_mib_counters_clear(pp);
731 for (queue = 0; queue < txq_number; queue++) {
732 struct mvneta_tx_queue *txq = &pp->txqs[queue];
733 if (txq->descs != NULL)
734 q_map |= (1 << queue);
736 mvreg_write(pp, MVNETA_TXQ_CMD, q_map);
738 /* Enable all initialized RXQs. */
740 for (queue = 0; queue < rxq_number; queue++) {
741 struct mvneta_rx_queue *rxq = &pp->rxqs[queue];
742 if (rxq->descs != NULL)
743 q_map |= (1 << queue);
746 mvreg_write(pp, MVNETA_RXQ_CMD, q_map);
749 /* Stop the Ethernet port activity */
750 static void mvneta_port_down(struct mvneta_port *pp)
755 /* Stop Rx port activity. Check port Rx activity. */
756 val = mvreg_read(pp, MVNETA_RXQ_CMD) & MVNETA_RXQ_ENABLE_MASK;
758 /* Issue stop command for active channels only */
760 mvreg_write(pp, MVNETA_RXQ_CMD,
761 val << MVNETA_RXQ_DISABLE_SHIFT);
763 /* Wait for all Rx activity to terminate. */
766 if (count++ >= MVNETA_RX_DISABLE_TIMEOUT_MSEC) {
768 "TIMEOUT for RX stopped ! rx_queue_cmd: 0x08%x\n",
774 val = mvreg_read(pp, MVNETA_RXQ_CMD);
775 } while (val & 0xff);
777 /* Stop Tx port activity. Check port Tx activity. Issue stop
778 * command for active channels only
780 val = (mvreg_read(pp, MVNETA_TXQ_CMD)) & MVNETA_TXQ_ENABLE_MASK;
783 mvreg_write(pp, MVNETA_TXQ_CMD,
784 (val << MVNETA_TXQ_DISABLE_SHIFT));
786 /* Wait for all Tx activity to terminate. */
789 if (count++ >= MVNETA_TX_DISABLE_TIMEOUT_MSEC) {
791 "TIMEOUT for TX stopped status=0x%08x\n",
797 /* Check TX Command reg that all Txqs are stopped */
798 val = mvreg_read(pp, MVNETA_TXQ_CMD);
800 } while (val & 0xff);
802 /* Double check to verify that TX FIFO is empty */
805 if (count++ >= MVNETA_TX_FIFO_EMPTY_TIMEOUT) {
807 "TX FIFO empty timeout status=0x08%x\n",
813 val = mvreg_read(pp, MVNETA_PORT_STATUS);
814 } while (!(val & MVNETA_TX_FIFO_EMPTY) &&
815 (val & MVNETA_TX_IN_PRGRS));
820 /* Enable the port by setting the port enable bit of the MAC control register */
821 static void mvneta_port_enable(struct mvneta_port *pp)
826 val = mvreg_read(pp, MVNETA_GMAC_CTRL_0);
827 val |= MVNETA_GMAC0_PORT_ENABLE;
828 mvreg_write(pp, MVNETA_GMAC_CTRL_0, val);
831 /* Disable the port and wait for about 200 usec before retuning */
832 static void mvneta_port_disable(struct mvneta_port *pp)
836 /* Reset the Enable bit in the Serial Control Register */
837 val = mvreg_read(pp, MVNETA_GMAC_CTRL_0);
838 val &= ~MVNETA_GMAC0_PORT_ENABLE;
839 mvreg_write(pp, MVNETA_GMAC_CTRL_0, val);
844 /* Multicast tables methods */
846 /* Set all entries in Unicast MAC Table; queue==-1 means reject all */
847 static void mvneta_set_ucast_table(struct mvneta_port *pp, int queue)
855 val = 0x1 | (queue << 1);
856 val |= (val << 24) | (val << 16) | (val << 8);
859 for (offset = 0; offset <= 0xc; offset += 4)
860 mvreg_write(pp, MVNETA_DA_FILT_UCAST_BASE + offset, val);
863 /* Set all entries in Special Multicast MAC Table; queue==-1 means reject all */
864 static void mvneta_set_special_mcast_table(struct mvneta_port *pp, int queue)
872 val = 0x1 | (queue << 1);
873 val |= (val << 24) | (val << 16) | (val << 8);
876 for (offset = 0; offset <= 0xfc; offset += 4)
877 mvreg_write(pp, MVNETA_DA_FILT_SPEC_MCAST + offset, val);
881 /* Set all entries in Other Multicast MAC Table. queue==-1 means reject all */
882 static void mvneta_set_other_mcast_table(struct mvneta_port *pp, int queue)
888 memset(pp->mcast_count, 0, sizeof(pp->mcast_count));
891 memset(pp->mcast_count, 1, sizeof(pp->mcast_count));
892 val = 0x1 | (queue << 1);
893 val |= (val << 24) | (val << 16) | (val << 8);
896 for (offset = 0; offset <= 0xfc; offset += 4)
897 mvreg_write(pp, MVNETA_DA_FILT_OTH_MCAST + offset, val);
900 /* This method sets defaults to the NETA port:
901 * Clears interrupt Cause and Mask registers.
902 * Clears all MAC tables.
903 * Sets defaults to all registers.
904 * Resets RX and TX descriptor rings.
906 * This method can be called after mvneta_port_down() to return the port
907 * settings to defaults.
909 static void mvneta_defaults_set(struct mvneta_port *pp)
915 /* Clear all Cause registers */
916 mvreg_write(pp, MVNETA_INTR_NEW_CAUSE, 0);
917 mvreg_write(pp, MVNETA_INTR_OLD_CAUSE, 0);
918 mvreg_write(pp, MVNETA_INTR_MISC_CAUSE, 0);
920 /* Mask all interrupts */
921 mvreg_write(pp, MVNETA_INTR_NEW_MASK, 0);
922 mvreg_write(pp, MVNETA_INTR_OLD_MASK, 0);
923 mvreg_write(pp, MVNETA_INTR_MISC_MASK, 0);
924 mvreg_write(pp, MVNETA_INTR_ENABLE, 0);
926 /* Enable MBUS Retry bit16 */
927 mvreg_write(pp, MVNETA_MBUS_RETRY, 0x20);
929 /* Set CPU queue access map - all CPUs have access to all RX
930 * queues and to all TX queues
932 for (cpu = 0; cpu < CONFIG_NR_CPUS; cpu++)
933 mvreg_write(pp, MVNETA_CPU_MAP(cpu),
934 (MVNETA_CPU_RXQ_ACCESS_ALL_MASK |
935 MVNETA_CPU_TXQ_ACCESS_ALL_MASK));
937 /* Reset RX and TX DMAs */
938 mvreg_write(pp, MVNETA_PORT_RX_RESET, MVNETA_PORT_RX_DMA_RESET);
939 mvreg_write(pp, MVNETA_PORT_TX_RESET, MVNETA_PORT_TX_DMA_RESET);
941 /* Disable Legacy WRR, Disable EJP, Release from reset */
942 mvreg_write(pp, MVNETA_TXQ_CMD_1, 0);
943 for (queue = 0; queue < txq_number; queue++) {
944 mvreg_write(pp, MVETH_TXQ_TOKEN_COUNT_REG(queue), 0);
945 mvreg_write(pp, MVETH_TXQ_TOKEN_CFG_REG(queue), 0);
948 mvreg_write(pp, MVNETA_PORT_TX_RESET, 0);
949 mvreg_write(pp, MVNETA_PORT_RX_RESET, 0);
951 /* Set Port Acceleration Mode */
952 val = MVNETA_ACC_MODE_EXT;
953 mvreg_write(pp, MVNETA_ACC_MODE, val);
955 /* Update val of portCfg register accordingly with all RxQueue types */
956 val = MVNETA_PORT_CONFIG_DEFL_VALUE(rxq_def);
957 mvreg_write(pp, MVNETA_PORT_CONFIG, val);
960 mvreg_write(pp, MVNETA_PORT_CONFIG_EXTEND, val);
961 mvreg_write(pp, MVNETA_RX_MIN_FRAME_SIZE, 64);
963 /* Build PORT_SDMA_CONFIG_REG */
966 /* Default burst size */
967 val |= MVNETA_TX_BRST_SZ_MASK(MVNETA_SDMA_BRST_SIZE_16);
968 val |= MVNETA_RX_BRST_SZ_MASK(MVNETA_SDMA_BRST_SIZE_16);
969 val |= MVNETA_RX_NO_DATA_SWAP | MVNETA_TX_NO_DATA_SWAP;
971 #if defined(__BIG_ENDIAN)
972 val |= MVNETA_DESC_SWAP;
975 /* Assign port SDMA configuration */
976 mvreg_write(pp, MVNETA_SDMA_CONFIG, val);
978 /* Disable PHY polling in hardware, since we're using the
979 * kernel phylib to do this.
981 val = mvreg_read(pp, MVNETA_UNIT_CONTROL);
982 val &= ~MVNETA_PHY_POLLING_ENABLE;
983 mvreg_write(pp, MVNETA_UNIT_CONTROL, val);
985 mvneta_set_ucast_table(pp, -1);
986 mvneta_set_special_mcast_table(pp, -1);
987 mvneta_set_other_mcast_table(pp, -1);
989 /* Set port interrupt enable register - default enable all */
990 mvreg_write(pp, MVNETA_INTR_ENABLE,
991 (MVNETA_RXQ_INTR_ENABLE_ALL_MASK
992 | MVNETA_TXQ_INTR_ENABLE_ALL_MASK));
995 /* Set max sizes for tx queues */
996 static void mvneta_txq_max_tx_size_set(struct mvneta_port *pp, int max_tx_size)
1002 mtu = max_tx_size * 8;
1003 if (mtu > MVNETA_TX_MTU_MAX)
1004 mtu = MVNETA_TX_MTU_MAX;
1007 val = mvreg_read(pp, MVNETA_TX_MTU);
1008 val &= ~MVNETA_TX_MTU_MAX;
1010 mvreg_write(pp, MVNETA_TX_MTU, val);
1012 /* TX token size and all TXQs token size must be larger that MTU */
1013 val = mvreg_read(pp, MVNETA_TX_TOKEN_SIZE);
1015 size = val & MVNETA_TX_TOKEN_SIZE_MAX;
1018 val &= ~MVNETA_TX_TOKEN_SIZE_MAX;
1020 mvreg_write(pp, MVNETA_TX_TOKEN_SIZE, val);
1022 for (queue = 0; queue < txq_number; queue++) {
1023 val = mvreg_read(pp, MVNETA_TXQ_TOKEN_SIZE_REG(queue));
1025 size = val & MVNETA_TXQ_TOKEN_SIZE_MAX;
1028 val &= ~MVNETA_TXQ_TOKEN_SIZE_MAX;
1030 mvreg_write(pp, MVNETA_TXQ_TOKEN_SIZE_REG(queue), val);
1035 /* Set unicast address */
1036 static void mvneta_set_ucast_addr(struct mvneta_port *pp, u8 last_nibble,
1039 unsigned int unicast_reg;
1040 unsigned int tbl_offset;
1041 unsigned int reg_offset;
1043 /* Locate the Unicast table entry */
1044 last_nibble = (0xf & last_nibble);
1046 /* offset from unicast tbl base */
1047 tbl_offset = (last_nibble / 4) * 4;
1049 /* offset within the above reg */
1050 reg_offset = last_nibble % 4;
1052 unicast_reg = mvreg_read(pp, (MVNETA_DA_FILT_UCAST_BASE + tbl_offset));
1055 /* Clear accepts frame bit at specified unicast DA tbl entry */
1056 unicast_reg &= ~(0xff << (8 * reg_offset));
1058 unicast_reg &= ~(0xff << (8 * reg_offset));
1059 unicast_reg |= ((0x01 | (queue << 1)) << (8 * reg_offset));
1062 mvreg_write(pp, (MVNETA_DA_FILT_UCAST_BASE + tbl_offset), unicast_reg);
1065 /* Set mac address */
1066 static void mvneta_mac_addr_set(struct mvneta_port *pp, unsigned char *addr,
1073 mac_l = (addr[4] << 8) | (addr[5]);
1074 mac_h = (addr[0] << 24) | (addr[1] << 16) |
1075 (addr[2] << 8) | (addr[3] << 0);
1077 mvreg_write(pp, MVNETA_MAC_ADDR_LOW, mac_l);
1078 mvreg_write(pp, MVNETA_MAC_ADDR_HIGH, mac_h);
1081 /* Accept frames of this address */
1082 mvneta_set_ucast_addr(pp, addr[5], queue);
1085 /* Set the number of packets that will be received before RX interrupt
1086 * will be generated by HW.
1088 static void mvneta_rx_pkts_coal_set(struct mvneta_port *pp,
1089 struct mvneta_rx_queue *rxq, u32 value)
1091 mvreg_write(pp, MVNETA_RXQ_THRESHOLD_REG(rxq->id),
1092 value | MVNETA_RXQ_NON_OCCUPIED(0));
1093 rxq->pkts_coal = value;
1096 /* Set the time delay in usec before RX interrupt will be generated by
1099 static void mvneta_rx_time_coal_set(struct mvneta_port *pp,
1100 struct mvneta_rx_queue *rxq, u32 value)
1103 unsigned long clk_rate;
1105 clk_rate = clk_get_rate(pp->clk);
1106 val = (clk_rate / 1000000) * value;
1108 mvreg_write(pp, MVNETA_RXQ_TIME_COAL_REG(rxq->id), val);
1109 rxq->time_coal = value;
1112 /* Set threshold for TX_DONE pkts coalescing */
1113 static void mvneta_tx_done_pkts_coal_set(struct mvneta_port *pp,
1114 struct mvneta_tx_queue *txq, u32 value)
1118 val = mvreg_read(pp, MVNETA_TXQ_SIZE_REG(txq->id));
1120 val &= ~MVNETA_TXQ_SENT_THRESH_ALL_MASK;
1121 val |= MVNETA_TXQ_SENT_THRESH_MASK(value);
1123 mvreg_write(pp, MVNETA_TXQ_SIZE_REG(txq->id), val);
1125 txq->done_pkts_coal = value;
1128 /* Handle rx descriptor fill by setting buf_cookie and buf_phys_addr */
1129 static void mvneta_rx_desc_fill(struct mvneta_rx_desc *rx_desc,
1130 u32 phys_addr, u32 cookie)
1132 rx_desc->buf_cookie = cookie;
1133 rx_desc->buf_phys_addr = phys_addr;
1136 /* Decrement sent descriptors counter */
1137 static void mvneta_txq_sent_desc_dec(struct mvneta_port *pp,
1138 struct mvneta_tx_queue *txq,
1143 /* Only 255 TX descriptors can be updated at once */
1144 while (sent_desc > 0xff) {
1145 val = 0xff << MVNETA_TXQ_DEC_SENT_SHIFT;
1146 mvreg_write(pp, MVNETA_TXQ_UPDATE_REG(txq->id), val);
1147 sent_desc = sent_desc - 0xff;
1150 val = sent_desc << MVNETA_TXQ_DEC_SENT_SHIFT;
1151 mvreg_write(pp, MVNETA_TXQ_UPDATE_REG(txq->id), val);
1154 /* Get number of TX descriptors already sent by HW */
1155 static int mvneta_txq_sent_desc_num_get(struct mvneta_port *pp,
1156 struct mvneta_tx_queue *txq)
1161 val = mvreg_read(pp, MVNETA_TXQ_STATUS_REG(txq->id));
1162 sent_desc = (val & MVNETA_TXQ_SENT_DESC_MASK) >>
1163 MVNETA_TXQ_SENT_DESC_SHIFT;
1168 /* Get number of sent descriptors and decrement counter.
1169 * The number of sent descriptors is returned.
1171 static int mvneta_txq_sent_desc_proc(struct mvneta_port *pp,
1172 struct mvneta_tx_queue *txq)
1176 /* Get number of sent descriptors */
1177 sent_desc = mvneta_txq_sent_desc_num_get(pp, txq);
1179 /* Decrement sent descriptors counter */
1181 mvneta_txq_sent_desc_dec(pp, txq, sent_desc);
1186 /* Set TXQ descriptors fields relevant for CSUM calculation */
1187 static u32 mvneta_txq_desc_csum(int l3_offs, int l3_proto,
1188 int ip_hdr_len, int l4_proto)
1192 /* Fields: L3_offset, IP_hdrlen, L3_type, G_IPv4_chk,
1193 * G_L4_chk, L4_type; required only for checksum
1196 command = l3_offs << MVNETA_TX_L3_OFF_SHIFT;
1197 command |= ip_hdr_len << MVNETA_TX_IP_HLEN_SHIFT;
1199 if (l3_proto == swab16(ETH_P_IP))
1200 command |= MVNETA_TXD_IP_CSUM;
1202 command |= MVNETA_TX_L3_IP6;
1204 if (l4_proto == IPPROTO_TCP)
1205 command |= MVNETA_TX_L4_CSUM_FULL;
1206 else if (l4_proto == IPPROTO_UDP)
1207 command |= MVNETA_TX_L4_UDP | MVNETA_TX_L4_CSUM_FULL;
1209 command |= MVNETA_TX_L4_CSUM_NOT;
1215 /* Display more error info */
1216 static void mvneta_rx_error(struct mvneta_port *pp,
1217 struct mvneta_rx_desc *rx_desc)
1219 u32 status = rx_desc->status;
1221 if (!mvneta_rxq_desc_is_first_last(status)) {
1223 "bad rx status %08x (buffer oversize), size=%d\n",
1224 status, rx_desc->data_size);
1228 switch (status & MVNETA_RXD_ERR_CODE_MASK) {
1229 case MVNETA_RXD_ERR_CRC:
1230 netdev_err(pp->dev, "bad rx status %08x (crc error), size=%d\n",
1231 status, rx_desc->data_size);
1233 case MVNETA_RXD_ERR_OVERRUN:
1234 netdev_err(pp->dev, "bad rx status %08x (overrun error), size=%d\n",
1235 status, rx_desc->data_size);
1237 case MVNETA_RXD_ERR_LEN:
1238 netdev_err(pp->dev, "bad rx status %08x (max frame length error), size=%d\n",
1239 status, rx_desc->data_size);
1241 case MVNETA_RXD_ERR_RESOURCE:
1242 netdev_err(pp->dev, "bad rx status %08x (resource error), size=%d\n",
1243 status, rx_desc->data_size);
1248 /* Handle RX checksum offload based on the descriptor's status */
1249 static void mvneta_rx_csum(struct mvneta_port *pp, u32 status,
1250 struct sk_buff *skb)
1252 if ((status & MVNETA_RXD_L3_IP4) &&
1253 (status & MVNETA_RXD_L4_CSUM_OK)) {
1255 skb->ip_summed = CHECKSUM_UNNECESSARY;
1259 skb->ip_summed = CHECKSUM_NONE;
1262 /* Return tx queue pointer (find last set bit) according to <cause> returned
1263 * form tx_done reg. <cause> must not be null. The return value is always a
1264 * valid queue for matching the first one found in <cause>.
1266 static struct mvneta_tx_queue *mvneta_tx_done_policy(struct mvneta_port *pp,
1269 int queue = fls(cause) - 1;
1271 return &pp->txqs[queue];
1274 /* Free tx queue skbuffs */
1275 static void mvneta_txq_bufs_free(struct mvneta_port *pp,
1276 struct mvneta_tx_queue *txq, int num)
1280 for (i = 0; i < num; i++) {
1281 struct mvneta_tx_desc *tx_desc = txq->descs +
1283 struct sk_buff *skb = txq->tx_skb[txq->txq_get_index];
1285 mvneta_txq_inc_get(txq);
1290 dma_unmap_single(pp->dev->dev.parent, tx_desc->buf_phys_addr,
1291 tx_desc->data_size, DMA_TO_DEVICE);
1292 dev_kfree_skb_any(skb);
1296 /* Handle end of transmission */
1297 static void mvneta_txq_done(struct mvneta_port *pp,
1298 struct mvneta_tx_queue *txq)
1300 struct netdev_queue *nq = netdev_get_tx_queue(pp->dev, txq->id);
1303 tx_done = mvneta_txq_sent_desc_proc(pp, txq);
1307 mvneta_txq_bufs_free(pp, txq, tx_done);
1309 txq->count -= tx_done;
1311 if (netif_tx_queue_stopped(nq)) {
1312 if (txq->size - txq->count >= MAX_SKB_FRAGS + 1)
1313 netif_tx_wake_queue(nq);
1317 static void *mvneta_frag_alloc(const struct mvneta_port *pp)
1319 if (likely(pp->frag_size <= PAGE_SIZE))
1320 return netdev_alloc_frag(pp->frag_size);
1322 return kmalloc(pp->frag_size, GFP_ATOMIC);
1325 static void mvneta_frag_free(const struct mvneta_port *pp, void *data)
1327 if (likely(pp->frag_size <= PAGE_SIZE))
1328 put_page(virt_to_head_page(data));
1333 /* Refill processing */
1334 static int mvneta_rx_refill(struct mvneta_port *pp,
1335 struct mvneta_rx_desc *rx_desc)
1338 dma_addr_t phys_addr;
1341 data = mvneta_frag_alloc(pp);
1345 phys_addr = dma_map_single(pp->dev->dev.parent, data,
1346 MVNETA_RX_BUF_SIZE(pp->pkt_size),
1348 if (unlikely(dma_mapping_error(pp->dev->dev.parent, phys_addr))) {
1349 mvneta_frag_free(pp, data);
1353 mvneta_rx_desc_fill(rx_desc, phys_addr, (u32)data);
1357 /* Handle tx checksum */
1358 static u32 mvneta_skb_tx_csum(struct mvneta_port *pp, struct sk_buff *skb)
1360 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1364 if (skb->protocol == htons(ETH_P_IP)) {
1365 struct iphdr *ip4h = ip_hdr(skb);
1367 /* Calculate IPv4 checksum and L4 checksum */
1368 ip_hdr_len = ip4h->ihl;
1369 l4_proto = ip4h->protocol;
1370 } else if (skb->protocol == htons(ETH_P_IPV6)) {
1371 struct ipv6hdr *ip6h = ipv6_hdr(skb);
1373 /* Read l4_protocol from one of IPv6 extra headers */
1374 if (skb_network_header_len(skb) > 0)
1375 ip_hdr_len = (skb_network_header_len(skb) >> 2);
1376 l4_proto = ip6h->nexthdr;
1378 return MVNETA_TX_L4_CSUM_NOT;
1380 return mvneta_txq_desc_csum(skb_network_offset(skb),
1381 skb->protocol, ip_hdr_len, l4_proto);
1384 return MVNETA_TX_L4_CSUM_NOT;
1387 /* Returns rx queue pointer (find last set bit) according to causeRxTx
1390 static struct mvneta_rx_queue *mvneta_rx_policy(struct mvneta_port *pp,
1393 int queue = fls(cause >> 8) - 1;
1395 return (queue < 0 || queue >= rxq_number) ? NULL : &pp->rxqs[queue];
1398 /* Drop packets received by the RXQ and free buffers */
1399 static void mvneta_rxq_drop_pkts(struct mvneta_port *pp,
1400 struct mvneta_rx_queue *rxq)
1404 rx_done = mvneta_rxq_busy_desc_num_get(pp, rxq);
1405 for (i = 0; i < rxq->size; i++) {
1406 struct mvneta_rx_desc *rx_desc = rxq->descs + i;
1407 void *data = (void *)rx_desc->buf_cookie;
1409 mvneta_frag_free(pp, data);
1410 dma_unmap_single(pp->dev->dev.parent, rx_desc->buf_phys_addr,
1411 MVNETA_RX_BUF_SIZE(pp->pkt_size), DMA_FROM_DEVICE);
1415 mvneta_rxq_desc_num_update(pp, rxq, rx_done, rx_done);
1418 /* Main rx processing */
1419 static int mvneta_rx(struct mvneta_port *pp, int rx_todo,
1420 struct mvneta_rx_queue *rxq)
1422 struct net_device *dev = pp->dev;
1423 int rx_done, rx_filled;
1427 /* Get number of received packets */
1428 rx_done = mvneta_rxq_busy_desc_num_get(pp, rxq);
1430 if (rx_todo > rx_done)
1436 /* Fairness NAPI loop */
1437 while (rx_done < rx_todo) {
1438 struct mvneta_rx_desc *rx_desc = mvneta_rxq_next_desc_get(rxq);
1439 struct sk_buff *skb;
1440 unsigned char *data;
1446 rx_status = rx_desc->status;
1447 rx_bytes = rx_desc->data_size - (ETH_FCS_LEN + MVNETA_MH_SIZE);
1448 data = (unsigned char *)rx_desc->buf_cookie;
1450 if (!mvneta_rxq_desc_is_first_last(rx_status) ||
1451 (rx_status & MVNETA_RXD_ERR_SUMMARY)) {
1453 dev->stats.rx_errors++;
1454 mvneta_rx_error(pp, rx_desc);
1455 /* leave the descriptor untouched */
1459 if (rx_bytes <= rx_copybreak) {
1460 /* better copy a small frame and not unmap the DMA region */
1461 skb = netdev_alloc_skb_ip_align(dev, rx_bytes);
1463 goto err_drop_frame;
1465 dma_sync_single_range_for_cpu(dev->dev.parent,
1466 rx_desc->buf_phys_addr,
1467 MVNETA_MH_SIZE + NET_SKB_PAD,
1470 memcpy(skb_put(skb, rx_bytes),
1471 data + MVNETA_MH_SIZE + NET_SKB_PAD,
1474 skb->protocol = eth_type_trans(skb, dev);
1475 mvneta_rx_csum(pp, rx_status, skb);
1476 napi_gro_receive(&pp->napi, skb);
1479 rcvd_bytes += rx_bytes;
1481 /* leave the descriptor and buffer untouched */
1485 skb = build_skb(data, pp->frag_size > PAGE_SIZE ? 0 : pp->frag_size);
1487 goto err_drop_frame;
1489 dma_unmap_single(dev->dev.parent, rx_desc->buf_phys_addr,
1490 MVNETA_RX_BUF_SIZE(pp->pkt_size), DMA_FROM_DEVICE);
1493 rcvd_bytes += rx_bytes;
1495 /* Linux processing */
1496 skb_reserve(skb, MVNETA_MH_SIZE + NET_SKB_PAD);
1497 skb_put(skb, rx_bytes);
1499 skb->protocol = eth_type_trans(skb, dev);
1501 mvneta_rx_csum(pp, rx_status, skb);
1503 napi_gro_receive(&pp->napi, skb);
1505 /* Refill processing */
1506 err = mvneta_rx_refill(pp, rx_desc);
1508 netdev_err(dev, "Linux processing - Can't refill\n");
1515 struct mvneta_pcpu_stats *stats = this_cpu_ptr(pp->stats);
1517 u64_stats_update_begin(&stats->syncp);
1518 stats->rx_packets += rcvd_pkts;
1519 stats->rx_bytes += rcvd_bytes;
1520 u64_stats_update_end(&stats->syncp);
1523 /* Update rxq management counters */
1524 mvneta_rxq_desc_num_update(pp, rxq, rx_done, rx_filled);
1530 mvneta_tso_put_hdr(struct sk_buff *skb,
1531 struct mvneta_port *pp, struct mvneta_tx_queue *txq)
1533 struct mvneta_tx_desc *tx_desc;
1534 int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1536 txq->tx_skb[txq->txq_put_index] = NULL;
1537 tx_desc = mvneta_txq_next_desc_get(txq);
1538 tx_desc->data_size = hdr_len;
1539 tx_desc->command = mvneta_skb_tx_csum(pp, skb);
1540 tx_desc->command |= MVNETA_TXD_F_DESC;
1541 tx_desc->buf_phys_addr = txq->tso_hdrs_phys +
1542 txq->txq_put_index * TSO_HEADER_SIZE;
1543 mvneta_txq_inc_put(txq);
1547 mvneta_tso_put_data(struct net_device *dev, struct mvneta_tx_queue *txq,
1548 struct sk_buff *skb, char *data, int size,
1549 bool last_tcp, bool is_last)
1551 struct mvneta_tx_desc *tx_desc;
1553 tx_desc = mvneta_txq_next_desc_get(txq);
1554 tx_desc->data_size = size;
1555 tx_desc->buf_phys_addr = dma_map_single(dev->dev.parent, data,
1556 size, DMA_TO_DEVICE);
1557 if (unlikely(dma_mapping_error(dev->dev.parent,
1558 tx_desc->buf_phys_addr))) {
1559 mvneta_txq_desc_put(txq);
1563 tx_desc->command = 0;
1564 txq->tx_skb[txq->txq_put_index] = NULL;
1567 /* last descriptor in the TCP packet */
1568 tx_desc->command = MVNETA_TXD_L_DESC;
1570 /* last descriptor in SKB */
1572 txq->tx_skb[txq->txq_put_index] = skb;
1574 mvneta_txq_inc_put(txq);
1578 static int mvneta_tx_tso(struct sk_buff *skb, struct net_device *dev,
1579 struct mvneta_tx_queue *txq)
1581 int total_len, data_left;
1583 struct mvneta_port *pp = netdev_priv(dev);
1585 int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1588 /* Count needed descriptors */
1589 if ((txq->count + tso_count_descs(skb)) >= txq->size)
1592 if (skb_headlen(skb) < (skb_transport_offset(skb) + tcp_hdrlen(skb))) {
1593 pr_info("*** Is this even possible???!?!?\n");
1597 /* Initialize the TSO handler, and prepare the first payload */
1598 tso_start(skb, &tso);
1600 total_len = skb->len - hdr_len;
1601 while (total_len > 0) {
1604 data_left = min_t(int, skb_shinfo(skb)->gso_size, total_len);
1605 total_len -= data_left;
1608 /* prepare packet headers: MAC + IP + TCP */
1609 hdr = txq->tso_hdrs + txq->txq_put_index * TSO_HEADER_SIZE;
1610 tso_build_hdr(skb, hdr, &tso, data_left, total_len == 0);
1612 mvneta_tso_put_hdr(skb, pp, txq);
1614 while (data_left > 0) {
1618 size = min_t(int, tso.size, data_left);
1620 if (mvneta_tso_put_data(dev, txq, skb,
1627 tso_build_data(skb, &tso, size);
1634 /* Release all used data descriptors; header descriptors must not
1637 for (i = desc_count - 1; i >= 0; i--) {
1638 struct mvneta_tx_desc *tx_desc = txq->descs + i;
1639 if (!(tx_desc->command & MVNETA_TXD_F_DESC))
1640 dma_unmap_single(pp->dev->dev.parent,
1641 tx_desc->buf_phys_addr,
1644 mvneta_txq_desc_put(txq);
1649 /* Handle tx fragmentation processing */
1650 static int mvneta_tx_frag_process(struct mvneta_port *pp, struct sk_buff *skb,
1651 struct mvneta_tx_queue *txq)
1653 struct mvneta_tx_desc *tx_desc;
1654 int i, nr_frags = skb_shinfo(skb)->nr_frags;
1656 for (i = 0; i < nr_frags; i++) {
1657 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1658 void *addr = page_address(frag->page.p) + frag->page_offset;
1660 tx_desc = mvneta_txq_next_desc_get(txq);
1661 tx_desc->data_size = frag->size;
1663 tx_desc->buf_phys_addr =
1664 dma_map_single(pp->dev->dev.parent, addr,
1665 tx_desc->data_size, DMA_TO_DEVICE);
1667 if (dma_mapping_error(pp->dev->dev.parent,
1668 tx_desc->buf_phys_addr)) {
1669 mvneta_txq_desc_put(txq);
1673 if (i == nr_frags - 1) {
1674 /* Last descriptor */
1675 tx_desc->command = MVNETA_TXD_L_DESC | MVNETA_TXD_Z_PAD;
1676 txq->tx_skb[txq->txq_put_index] = skb;
1678 /* Descriptor in the middle: Not First, Not Last */
1679 tx_desc->command = 0;
1680 txq->tx_skb[txq->txq_put_index] = NULL;
1682 mvneta_txq_inc_put(txq);
1688 /* Release all descriptors that were used to map fragments of
1689 * this packet, as well as the corresponding DMA mappings
1691 for (i = i - 1; i >= 0; i--) {
1692 tx_desc = txq->descs + i;
1693 dma_unmap_single(pp->dev->dev.parent,
1694 tx_desc->buf_phys_addr,
1697 mvneta_txq_desc_put(txq);
1703 /* Main tx processing */
1704 static int mvneta_tx(struct sk_buff *skb, struct net_device *dev)
1706 struct mvneta_port *pp = netdev_priv(dev);
1707 u16 txq_id = skb_get_queue_mapping(skb);
1708 struct mvneta_tx_queue *txq = &pp->txqs[txq_id];
1709 struct mvneta_tx_desc *tx_desc;
1713 if (!netif_running(dev))
1716 if (skb_is_gso(skb)) {
1717 frags = mvneta_tx_tso(skb, dev, txq);
1721 frags = skb_shinfo(skb)->nr_frags + 1;
1723 /* Get a descriptor for the first part of the packet */
1724 tx_desc = mvneta_txq_next_desc_get(txq);
1726 tx_cmd = mvneta_skb_tx_csum(pp, skb);
1728 tx_desc->data_size = skb_headlen(skb);
1730 tx_desc->buf_phys_addr = dma_map_single(dev->dev.parent, skb->data,
1733 if (unlikely(dma_mapping_error(dev->dev.parent,
1734 tx_desc->buf_phys_addr))) {
1735 mvneta_txq_desc_put(txq);
1741 /* First and Last descriptor */
1742 tx_cmd |= MVNETA_TXD_FLZ_DESC;
1743 tx_desc->command = tx_cmd;
1744 txq->tx_skb[txq->txq_put_index] = skb;
1745 mvneta_txq_inc_put(txq);
1747 /* First but not Last */
1748 tx_cmd |= MVNETA_TXD_F_DESC;
1749 txq->tx_skb[txq->txq_put_index] = NULL;
1750 mvneta_txq_inc_put(txq);
1751 tx_desc->command = tx_cmd;
1752 /* Continue with other skb fragments */
1753 if (mvneta_tx_frag_process(pp, skb, txq)) {
1754 dma_unmap_single(dev->dev.parent,
1755 tx_desc->buf_phys_addr,
1758 mvneta_txq_desc_put(txq);
1766 struct mvneta_pcpu_stats *stats = this_cpu_ptr(pp->stats);
1767 struct netdev_queue *nq = netdev_get_tx_queue(dev, txq_id);
1769 txq->count += frags;
1770 mvneta_txq_pend_desc_add(pp, txq, frags);
1772 if (txq->size - txq->count < MAX_SKB_FRAGS + 1)
1773 netif_tx_stop_queue(nq);
1775 u64_stats_update_begin(&stats->syncp);
1776 stats->tx_packets++;
1777 stats->tx_bytes += skb->len;
1778 u64_stats_update_end(&stats->syncp);
1780 dev->stats.tx_dropped++;
1781 dev_kfree_skb_any(skb);
1784 return NETDEV_TX_OK;
1788 /* Free tx resources, when resetting a port */
1789 static void mvneta_txq_done_force(struct mvneta_port *pp,
1790 struct mvneta_tx_queue *txq)
1793 int tx_done = txq->count;
1795 mvneta_txq_bufs_free(pp, txq, tx_done);
1799 txq->txq_put_index = 0;
1800 txq->txq_get_index = 0;
1803 /* Handle tx done - called in softirq context. The <cause_tx_done> argument
1804 * must be a valid cause according to MVNETA_TXQ_INTR_MASK_ALL.
1806 static void mvneta_tx_done_gbe(struct mvneta_port *pp, u32 cause_tx_done)
1808 struct mvneta_tx_queue *txq;
1809 struct netdev_queue *nq;
1811 while (cause_tx_done) {
1812 txq = mvneta_tx_done_policy(pp, cause_tx_done);
1814 nq = netdev_get_tx_queue(pp->dev, txq->id);
1815 __netif_tx_lock(nq, smp_processor_id());
1818 mvneta_txq_done(pp, txq);
1820 __netif_tx_unlock(nq);
1821 cause_tx_done &= ~((1 << txq->id));
1825 /* Compute crc8 of the specified address, using a unique algorithm ,
1826 * according to hw spec, different than generic crc8 algorithm
1828 static int mvneta_addr_crc(unsigned char *addr)
1833 for (i = 0; i < ETH_ALEN; i++) {
1836 crc = (crc ^ addr[i]) << 8;
1837 for (j = 7; j >= 0; j--) {
1838 if (crc & (0x100 << j))
1846 /* This method controls the net device special MAC multicast support.
1847 * The Special Multicast Table for MAC addresses supports MAC of the form
1848 * 0x01-00-5E-00-00-XX (where XX is between 0x00 and 0xFF).
1849 * The MAC DA[7:0] bits are used as a pointer to the Special Multicast
1850 * Table entries in the DA-Filter table. This method set the Special
1851 * Multicast Table appropriate entry.
1853 static void mvneta_set_special_mcast_addr(struct mvneta_port *pp,
1854 unsigned char last_byte,
1857 unsigned int smc_table_reg;
1858 unsigned int tbl_offset;
1859 unsigned int reg_offset;
1861 /* Register offset from SMC table base */
1862 tbl_offset = (last_byte / 4);
1863 /* Entry offset within the above reg */
1864 reg_offset = last_byte % 4;
1866 smc_table_reg = mvreg_read(pp, (MVNETA_DA_FILT_SPEC_MCAST
1870 smc_table_reg &= ~(0xff << (8 * reg_offset));
1872 smc_table_reg &= ~(0xff << (8 * reg_offset));
1873 smc_table_reg |= ((0x01 | (queue << 1)) << (8 * reg_offset));
1876 mvreg_write(pp, MVNETA_DA_FILT_SPEC_MCAST + tbl_offset * 4,
1880 /* This method controls the network device Other MAC multicast support.
1881 * The Other Multicast Table is used for multicast of another type.
1882 * A CRC-8 is used as an index to the Other Multicast Table entries
1883 * in the DA-Filter table.
1884 * The method gets the CRC-8 value from the calling routine and
1885 * sets the Other Multicast Table appropriate entry according to the
1888 static void mvneta_set_other_mcast_addr(struct mvneta_port *pp,
1892 unsigned int omc_table_reg;
1893 unsigned int tbl_offset;
1894 unsigned int reg_offset;
1896 tbl_offset = (crc8 / 4) * 4; /* Register offset from OMC table base */
1897 reg_offset = crc8 % 4; /* Entry offset within the above reg */
1899 omc_table_reg = mvreg_read(pp, MVNETA_DA_FILT_OTH_MCAST + tbl_offset);
1902 /* Clear accepts frame bit at specified Other DA table entry */
1903 omc_table_reg &= ~(0xff << (8 * reg_offset));
1905 omc_table_reg &= ~(0xff << (8 * reg_offset));
1906 omc_table_reg |= ((0x01 | (queue << 1)) << (8 * reg_offset));
1909 mvreg_write(pp, MVNETA_DA_FILT_OTH_MCAST + tbl_offset, omc_table_reg);
1912 /* The network device supports multicast using two tables:
1913 * 1) Special Multicast Table for MAC addresses of the form
1914 * 0x01-00-5E-00-00-XX (where XX is between 0x00 and 0xFF).
1915 * The MAC DA[7:0] bits are used as a pointer to the Special Multicast
1916 * Table entries in the DA-Filter table.
1917 * 2) Other Multicast Table for multicast of another type. A CRC-8 value
1918 * is used as an index to the Other Multicast Table entries in the
1921 static int mvneta_mcast_addr_set(struct mvneta_port *pp, unsigned char *p_addr,
1924 unsigned char crc_result = 0;
1926 if (memcmp(p_addr, "\x01\x00\x5e\x00\x00", 5) == 0) {
1927 mvneta_set_special_mcast_addr(pp, p_addr[5], queue);
1931 crc_result = mvneta_addr_crc(p_addr);
1933 if (pp->mcast_count[crc_result] == 0) {
1934 netdev_info(pp->dev, "No valid Mcast for crc8=0x%02x\n",
1939 pp->mcast_count[crc_result]--;
1940 if (pp->mcast_count[crc_result] != 0) {
1941 netdev_info(pp->dev,
1942 "After delete there are %d valid Mcast for crc8=0x%02x\n",
1943 pp->mcast_count[crc_result], crc_result);
1947 pp->mcast_count[crc_result]++;
1949 mvneta_set_other_mcast_addr(pp, crc_result, queue);
1954 /* Configure Fitering mode of Ethernet port */
1955 static void mvneta_rx_unicast_promisc_set(struct mvneta_port *pp,
1958 u32 port_cfg_reg, val;
1960 port_cfg_reg = mvreg_read(pp, MVNETA_PORT_CONFIG);
1962 val = mvreg_read(pp, MVNETA_TYPE_PRIO);
1964 /* Set / Clear UPM bit in port configuration register */
1966 /* Accept all Unicast addresses */
1967 port_cfg_reg |= MVNETA_UNI_PROMISC_MODE;
1968 val |= MVNETA_FORCE_UNI;
1969 mvreg_write(pp, MVNETA_MAC_ADDR_LOW, 0xffff);
1970 mvreg_write(pp, MVNETA_MAC_ADDR_HIGH, 0xffffffff);
1972 /* Reject all Unicast addresses */
1973 port_cfg_reg &= ~MVNETA_UNI_PROMISC_MODE;
1974 val &= ~MVNETA_FORCE_UNI;
1977 mvreg_write(pp, MVNETA_PORT_CONFIG, port_cfg_reg);
1978 mvreg_write(pp, MVNETA_TYPE_PRIO, val);
1981 /* register unicast and multicast addresses */
1982 static void mvneta_set_rx_mode(struct net_device *dev)
1984 struct mvneta_port *pp = netdev_priv(dev);
1985 struct netdev_hw_addr *ha;
1987 if (dev->flags & IFF_PROMISC) {
1988 /* Accept all: Multicast + Unicast */
1989 mvneta_rx_unicast_promisc_set(pp, 1);
1990 mvneta_set_ucast_table(pp, rxq_def);
1991 mvneta_set_special_mcast_table(pp, rxq_def);
1992 mvneta_set_other_mcast_table(pp, rxq_def);
1994 /* Accept single Unicast */
1995 mvneta_rx_unicast_promisc_set(pp, 0);
1996 mvneta_set_ucast_table(pp, -1);
1997 mvneta_mac_addr_set(pp, dev->dev_addr, rxq_def);
1999 if (dev->flags & IFF_ALLMULTI) {
2000 /* Accept all multicast */
2001 mvneta_set_special_mcast_table(pp, rxq_def);
2002 mvneta_set_other_mcast_table(pp, rxq_def);
2004 /* Accept only initialized multicast */
2005 mvneta_set_special_mcast_table(pp, -1);
2006 mvneta_set_other_mcast_table(pp, -1);
2008 if (!netdev_mc_empty(dev)) {
2009 netdev_for_each_mc_addr(ha, dev) {
2010 mvneta_mcast_addr_set(pp, ha->addr,
2018 /* Interrupt handling - the callback for request_irq() */
2019 static irqreturn_t mvneta_isr(int irq, void *dev_id)
2021 struct mvneta_port *pp = (struct mvneta_port *)dev_id;
2023 /* Mask all interrupts */
2024 mvreg_write(pp, MVNETA_INTR_NEW_MASK, 0);
2026 napi_schedule(&pp->napi);
2032 * Bits 0 - 7 of the causeRxTx register indicate that are transmitted
2033 * packets on the corresponding TXQ (Bit 0 is for TX queue 1).
2034 * Bits 8 -15 of the cause Rx Tx register indicate that are received
2035 * packets on the corresponding RXQ (Bit 8 is for RX queue 0).
2036 * Each CPU has its own causeRxTx register
2038 static int mvneta_poll(struct napi_struct *napi, int budget)
2042 unsigned long flags;
2043 struct mvneta_port *pp = netdev_priv(napi->dev);
2045 if (!netif_running(pp->dev)) {
2046 napi_complete(napi);
2050 /* Read cause register */
2051 cause_rx_tx = mvreg_read(pp, MVNETA_INTR_NEW_CAUSE) &
2052 (MVNETA_RX_INTR_MASK(rxq_number) | MVNETA_TX_INTR_MASK(txq_number));
2054 /* Release Tx descriptors */
2055 if (cause_rx_tx & MVNETA_TX_INTR_MASK_ALL) {
2056 mvneta_tx_done_gbe(pp, (cause_rx_tx & MVNETA_TX_INTR_MASK_ALL));
2057 cause_rx_tx &= ~MVNETA_TX_INTR_MASK_ALL;
2060 /* For the case where the last mvneta_poll did not process all
2063 cause_rx_tx |= pp->cause_rx_tx;
2064 if (rxq_number > 1) {
2065 while ((cause_rx_tx & MVNETA_RX_INTR_MASK_ALL) && (budget > 0)) {
2067 struct mvneta_rx_queue *rxq;
2068 /* get rx queue number from cause_rx_tx */
2069 rxq = mvneta_rx_policy(pp, cause_rx_tx);
2073 /* process the packet in that rx queue */
2074 count = mvneta_rx(pp, budget, rxq);
2078 /* set off the rx bit of the
2079 * corresponding bit in the cause rx
2080 * tx register, so that next iteration
2081 * will find the next rx queue where
2082 * packets are received on
2084 cause_rx_tx &= ~((1 << rxq->id) << 8);
2088 rx_done = mvneta_rx(pp, budget, &pp->rxqs[rxq_def]);
2094 napi_complete(napi);
2095 local_irq_save(flags);
2096 mvreg_write(pp, MVNETA_INTR_NEW_MASK,
2097 MVNETA_RX_INTR_MASK(rxq_number) | MVNETA_TX_INTR_MASK(txq_number));
2098 local_irq_restore(flags);
2101 pp->cause_rx_tx = cause_rx_tx;
2105 /* Handle rxq fill: allocates rxq skbs; called when initializing a port */
2106 static int mvneta_rxq_fill(struct mvneta_port *pp, struct mvneta_rx_queue *rxq,
2111 for (i = 0; i < num; i++) {
2112 memset(rxq->descs + i, 0, sizeof(struct mvneta_rx_desc));
2113 if (mvneta_rx_refill(pp, rxq->descs + i) != 0) {
2114 netdev_err(pp->dev, "%s:rxq %d, %d of %d buffs filled\n",
2115 __func__, rxq->id, i, num);
2120 /* Add this number of RX descriptors as non occupied (ready to
2123 mvneta_rxq_non_occup_desc_add(pp, rxq, i);
2128 /* Free all packets pending transmit from all TXQs and reset TX port */
2129 static void mvneta_tx_reset(struct mvneta_port *pp)
2133 /* free the skb's in the tx ring */
2134 for (queue = 0; queue < txq_number; queue++)
2135 mvneta_txq_done_force(pp, &pp->txqs[queue]);
2137 mvreg_write(pp, MVNETA_PORT_TX_RESET, MVNETA_PORT_TX_DMA_RESET);
2138 mvreg_write(pp, MVNETA_PORT_TX_RESET, 0);
2141 static void mvneta_rx_reset(struct mvneta_port *pp)
2143 mvreg_write(pp, MVNETA_PORT_RX_RESET, MVNETA_PORT_RX_DMA_RESET);
2144 mvreg_write(pp, MVNETA_PORT_RX_RESET, 0);
2147 /* Rx/Tx queue initialization/cleanup methods */
2149 /* Create a specified RX queue */
2150 static int mvneta_rxq_init(struct mvneta_port *pp,
2151 struct mvneta_rx_queue *rxq)
2154 rxq->size = pp->rx_ring_size;
2156 /* Allocate memory for RX descriptors */
2157 rxq->descs = dma_alloc_coherent(pp->dev->dev.parent,
2158 rxq->size * MVNETA_DESC_ALIGNED_SIZE,
2159 &rxq->descs_phys, GFP_KERNEL);
2160 if (rxq->descs == NULL)
2163 BUG_ON(rxq->descs !=
2164 PTR_ALIGN(rxq->descs, MVNETA_CPU_D_CACHE_LINE_SIZE));
2166 rxq->last_desc = rxq->size - 1;
2168 /* Set Rx descriptors queue starting address */
2169 mvreg_write(pp, MVNETA_RXQ_BASE_ADDR_REG(rxq->id), rxq->descs_phys);
2170 mvreg_write(pp, MVNETA_RXQ_SIZE_REG(rxq->id), rxq->size);
2173 mvneta_rxq_offset_set(pp, rxq, NET_SKB_PAD);
2175 /* Set coalescing pkts and time */
2176 mvneta_rx_pkts_coal_set(pp, rxq, rxq->pkts_coal);
2177 mvneta_rx_time_coal_set(pp, rxq, rxq->time_coal);
2179 /* Fill RXQ with buffers from RX pool */
2180 mvneta_rxq_buf_size_set(pp, rxq, MVNETA_RX_BUF_SIZE(pp->pkt_size));
2181 mvneta_rxq_bm_disable(pp, rxq);
2182 mvneta_rxq_fill(pp, rxq, rxq->size);
2187 /* Cleanup Rx queue */
2188 static void mvneta_rxq_deinit(struct mvneta_port *pp,
2189 struct mvneta_rx_queue *rxq)
2191 mvneta_rxq_drop_pkts(pp, rxq);
2194 dma_free_coherent(pp->dev->dev.parent,
2195 rxq->size * MVNETA_DESC_ALIGNED_SIZE,
2201 rxq->next_desc_to_proc = 0;
2202 rxq->descs_phys = 0;
2205 /* Create and initialize a tx queue */
2206 static int mvneta_txq_init(struct mvneta_port *pp,
2207 struct mvneta_tx_queue *txq)
2209 txq->size = pp->tx_ring_size;
2211 /* Allocate memory for TX descriptors */
2212 txq->descs = dma_alloc_coherent(pp->dev->dev.parent,
2213 txq->size * MVNETA_DESC_ALIGNED_SIZE,
2214 &txq->descs_phys, GFP_KERNEL);
2215 if (txq->descs == NULL)
2218 /* Make sure descriptor address is cache line size aligned */
2219 BUG_ON(txq->descs !=
2220 PTR_ALIGN(txq->descs, MVNETA_CPU_D_CACHE_LINE_SIZE));
2222 txq->last_desc = txq->size - 1;
2224 /* Set maximum bandwidth for enabled TXQs */
2225 mvreg_write(pp, MVETH_TXQ_TOKEN_CFG_REG(txq->id), 0x03ffffff);
2226 mvreg_write(pp, MVETH_TXQ_TOKEN_COUNT_REG(txq->id), 0x3fffffff);
2228 /* Set Tx descriptors queue starting address */
2229 mvreg_write(pp, MVNETA_TXQ_BASE_ADDR_REG(txq->id), txq->descs_phys);
2230 mvreg_write(pp, MVNETA_TXQ_SIZE_REG(txq->id), txq->size);
2232 txq->tx_skb = kmalloc(txq->size * sizeof(*txq->tx_skb), GFP_KERNEL);
2233 if (txq->tx_skb == NULL) {
2234 dma_free_coherent(pp->dev->dev.parent,
2235 txq->size * MVNETA_DESC_ALIGNED_SIZE,
2236 txq->descs, txq->descs_phys);
2240 /* Allocate DMA buffers for TSO MAC/IP/TCP headers */
2241 txq->tso_hdrs = dma_alloc_coherent(pp->dev->dev.parent,
2242 txq->size * TSO_HEADER_SIZE,
2243 &txq->tso_hdrs_phys, GFP_KERNEL);
2244 if (txq->tso_hdrs == NULL) {
2246 dma_free_coherent(pp->dev->dev.parent,
2247 txq->size * MVNETA_DESC_ALIGNED_SIZE,
2248 txq->descs, txq->descs_phys);
2251 mvneta_tx_done_pkts_coal_set(pp, txq, txq->done_pkts_coal);
2256 /* Free allocated resources when mvneta_txq_init() fails to allocate memory*/
2257 static void mvneta_txq_deinit(struct mvneta_port *pp,
2258 struct mvneta_tx_queue *txq)
2263 dma_free_coherent(pp->dev->dev.parent,
2264 txq->size * TSO_HEADER_SIZE,
2265 txq->tso_hdrs, txq->tso_hdrs_phys);
2267 dma_free_coherent(pp->dev->dev.parent,
2268 txq->size * MVNETA_DESC_ALIGNED_SIZE,
2269 txq->descs, txq->descs_phys);
2273 txq->next_desc_to_proc = 0;
2274 txq->descs_phys = 0;
2276 /* Set minimum bandwidth for disabled TXQs */
2277 mvreg_write(pp, MVETH_TXQ_TOKEN_CFG_REG(txq->id), 0);
2278 mvreg_write(pp, MVETH_TXQ_TOKEN_COUNT_REG(txq->id), 0);
2280 /* Set Tx descriptors queue starting address and size */
2281 mvreg_write(pp, MVNETA_TXQ_BASE_ADDR_REG(txq->id), 0);
2282 mvreg_write(pp, MVNETA_TXQ_SIZE_REG(txq->id), 0);
2285 /* Cleanup all Tx queues */
2286 static void mvneta_cleanup_txqs(struct mvneta_port *pp)
2290 for (queue = 0; queue < txq_number; queue++)
2291 mvneta_txq_deinit(pp, &pp->txqs[queue]);
2294 /* Cleanup all Rx queues */
2295 static void mvneta_cleanup_rxqs(struct mvneta_port *pp)
2299 for (queue = 0; queue < rxq_number; queue++)
2300 mvneta_rxq_deinit(pp, &pp->rxqs[queue]);
2304 /* Init all Rx queues */
2305 static int mvneta_setup_rxqs(struct mvneta_port *pp)
2309 for (queue = 0; queue < rxq_number; queue++) {
2310 int err = mvneta_rxq_init(pp, &pp->rxqs[queue]);
2312 netdev_err(pp->dev, "%s: can't create rxq=%d\n",
2314 mvneta_cleanup_rxqs(pp);
2322 /* Init all tx queues */
2323 static int mvneta_setup_txqs(struct mvneta_port *pp)
2327 for (queue = 0; queue < txq_number; queue++) {
2328 int err = mvneta_txq_init(pp, &pp->txqs[queue]);
2330 netdev_err(pp->dev, "%s: can't create txq=%d\n",
2332 mvneta_cleanup_txqs(pp);
2340 static void mvneta_start_dev(struct mvneta_port *pp)
2342 mvneta_max_rx_size_set(pp, pp->pkt_size);
2343 mvneta_txq_max_tx_size_set(pp, pp->pkt_size);
2345 /* start the Rx/Tx activity */
2346 mvneta_port_enable(pp);
2348 /* Enable polling on the port */
2349 napi_enable(&pp->napi);
2351 /* Unmask interrupts */
2352 mvreg_write(pp, MVNETA_INTR_NEW_MASK,
2353 MVNETA_RX_INTR_MASK(rxq_number) | MVNETA_TX_INTR_MASK(txq_number));
2355 phy_start(pp->phy_dev);
2356 netif_tx_start_all_queues(pp->dev);
2359 static void mvneta_stop_dev(struct mvneta_port *pp)
2361 phy_stop(pp->phy_dev);
2363 napi_disable(&pp->napi);
2365 netif_carrier_off(pp->dev);
2367 mvneta_port_down(pp);
2368 netif_tx_stop_all_queues(pp->dev);
2370 /* Stop the port activity */
2371 mvneta_port_disable(pp);
2373 /* Clear all ethernet port interrupts */
2374 mvreg_write(pp, MVNETA_INTR_MISC_CAUSE, 0);
2375 mvreg_write(pp, MVNETA_INTR_OLD_CAUSE, 0);
2377 /* Mask all ethernet port interrupts */
2378 mvreg_write(pp, MVNETA_INTR_NEW_MASK, 0);
2379 mvreg_write(pp, MVNETA_INTR_OLD_MASK, 0);
2380 mvreg_write(pp, MVNETA_INTR_MISC_MASK, 0);
2382 mvneta_tx_reset(pp);
2383 mvneta_rx_reset(pp);
2386 /* Return positive if MTU is valid */
2387 static int mvneta_check_mtu_valid(struct net_device *dev, int mtu)
2390 netdev_err(dev, "cannot change mtu to less than 68\n");
2394 /* 9676 == 9700 - 20 and rounding to 8 */
2396 netdev_info(dev, "Illegal MTU value %d, round to 9676\n", mtu);
2400 if (!IS_ALIGNED(MVNETA_RX_PKT_SIZE(mtu), 8)) {
2401 netdev_info(dev, "Illegal MTU value %d, rounding to %d\n",
2402 mtu, ALIGN(MVNETA_RX_PKT_SIZE(mtu), 8));
2403 mtu = ALIGN(MVNETA_RX_PKT_SIZE(mtu), 8);
2409 /* Change the device mtu */
2410 static int mvneta_change_mtu(struct net_device *dev, int mtu)
2412 struct mvneta_port *pp = netdev_priv(dev);
2415 mtu = mvneta_check_mtu_valid(dev, mtu);
2421 if (!netif_running(dev))
2424 /* The interface is running, so we have to force a
2425 * reallocation of the queues
2427 mvneta_stop_dev(pp);
2429 mvneta_cleanup_txqs(pp);
2430 mvneta_cleanup_rxqs(pp);
2432 pp->pkt_size = MVNETA_RX_PKT_SIZE(dev->mtu);
2433 pp->frag_size = SKB_DATA_ALIGN(MVNETA_RX_BUF_SIZE(pp->pkt_size)) +
2434 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
2436 ret = mvneta_setup_rxqs(pp);
2438 netdev_err(dev, "unable to setup rxqs after MTU change\n");
2442 ret = mvneta_setup_txqs(pp);
2444 netdev_err(dev, "unable to setup txqs after MTU change\n");
2448 mvneta_start_dev(pp);
2454 /* Get mac address */
2455 static void mvneta_get_mac_addr(struct mvneta_port *pp, unsigned char *addr)
2457 u32 mac_addr_l, mac_addr_h;
2459 mac_addr_l = mvreg_read(pp, MVNETA_MAC_ADDR_LOW);
2460 mac_addr_h = mvreg_read(pp, MVNETA_MAC_ADDR_HIGH);
2461 addr[0] = (mac_addr_h >> 24) & 0xFF;
2462 addr[1] = (mac_addr_h >> 16) & 0xFF;
2463 addr[2] = (mac_addr_h >> 8) & 0xFF;
2464 addr[3] = mac_addr_h & 0xFF;
2465 addr[4] = (mac_addr_l >> 8) & 0xFF;
2466 addr[5] = mac_addr_l & 0xFF;
2469 /* Handle setting mac address */
2470 static int mvneta_set_mac_addr(struct net_device *dev, void *addr)
2472 struct mvneta_port *pp = netdev_priv(dev);
2473 struct sockaddr *sockaddr = addr;
2476 ret = eth_prepare_mac_addr_change(dev, addr);
2479 /* Remove previous address table entry */
2480 mvneta_mac_addr_set(pp, dev->dev_addr, -1);
2482 /* Set new addr in hw */
2483 mvneta_mac_addr_set(pp, sockaddr->sa_data, rxq_def);
2485 eth_commit_mac_addr_change(dev, addr);
2489 static void mvneta_adjust_link(struct net_device *ndev)
2491 struct mvneta_port *pp = netdev_priv(ndev);
2492 struct phy_device *phydev = pp->phy_dev;
2493 int status_change = 0;
2496 if ((pp->speed != phydev->speed) ||
2497 (pp->duplex != phydev->duplex)) {
2500 val = mvreg_read(pp, MVNETA_GMAC_AUTONEG_CONFIG);
2501 val &= ~(MVNETA_GMAC_CONFIG_MII_SPEED |
2502 MVNETA_GMAC_CONFIG_GMII_SPEED |
2503 MVNETA_GMAC_CONFIG_FULL_DUPLEX |
2504 MVNETA_GMAC_AN_SPEED_EN |
2505 MVNETA_GMAC_AN_DUPLEX_EN);
2508 val |= MVNETA_GMAC_CONFIG_FULL_DUPLEX;
2510 if (phydev->speed == SPEED_1000)
2511 val |= MVNETA_GMAC_CONFIG_GMII_SPEED;
2513 val |= MVNETA_GMAC_CONFIG_MII_SPEED;
2515 mvreg_write(pp, MVNETA_GMAC_AUTONEG_CONFIG, val);
2517 pp->duplex = phydev->duplex;
2518 pp->speed = phydev->speed;
2522 if (phydev->link != pp->link) {
2523 if (!phydev->link) {
2528 pp->link = phydev->link;
2532 if (status_change) {
2534 u32 val = mvreg_read(pp, MVNETA_GMAC_AUTONEG_CONFIG);
2535 val |= (MVNETA_GMAC_FORCE_LINK_PASS |
2536 MVNETA_GMAC_FORCE_LINK_DOWN);
2537 mvreg_write(pp, MVNETA_GMAC_AUTONEG_CONFIG, val);
2539 netdev_info(pp->dev, "link up\n");
2541 mvneta_port_down(pp);
2542 netdev_info(pp->dev, "link down\n");
2547 static int mvneta_mdio_probe(struct mvneta_port *pp)
2549 struct phy_device *phy_dev;
2551 phy_dev = of_phy_connect(pp->dev, pp->phy_node, mvneta_adjust_link, 0,
2554 netdev_err(pp->dev, "could not find the PHY\n");
2558 phy_dev->supported &= PHY_GBIT_FEATURES;
2559 phy_dev->advertising = phy_dev->supported;
2561 pp->phy_dev = phy_dev;
2569 static void mvneta_mdio_remove(struct mvneta_port *pp)
2571 phy_disconnect(pp->phy_dev);
2575 static int mvneta_open(struct net_device *dev)
2577 struct mvneta_port *pp = netdev_priv(dev);
2580 pp->pkt_size = MVNETA_RX_PKT_SIZE(pp->dev->mtu);
2581 pp->frag_size = SKB_DATA_ALIGN(MVNETA_RX_BUF_SIZE(pp->pkt_size)) +
2582 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
2584 ret = mvneta_setup_rxqs(pp);
2588 ret = mvneta_setup_txqs(pp);
2590 goto err_cleanup_rxqs;
2592 /* Connect to port interrupt line */
2593 ret = request_irq(pp->dev->irq, mvneta_isr, 0,
2594 MVNETA_DRIVER_NAME, pp);
2596 netdev_err(pp->dev, "cannot request irq %d\n", pp->dev->irq);
2597 goto err_cleanup_txqs;
2600 /* In default link is down */
2601 netif_carrier_off(pp->dev);
2603 ret = mvneta_mdio_probe(pp);
2605 netdev_err(dev, "cannot probe MDIO bus\n");
2609 mvneta_start_dev(pp);
2614 free_irq(pp->dev->irq, pp);
2616 mvneta_cleanup_txqs(pp);
2618 mvneta_cleanup_rxqs(pp);
2622 /* Stop the port, free port interrupt line */
2623 static int mvneta_stop(struct net_device *dev)
2625 struct mvneta_port *pp = netdev_priv(dev);
2627 mvneta_stop_dev(pp);
2628 mvneta_mdio_remove(pp);
2629 free_irq(dev->irq, pp);
2630 mvneta_cleanup_rxqs(pp);
2631 mvneta_cleanup_txqs(pp);
2636 static int mvneta_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2638 struct mvneta_port *pp = netdev_priv(dev);
2644 ret = phy_mii_ioctl(pp->phy_dev, ifr, cmd);
2646 mvneta_adjust_link(dev);
2651 /* Ethtool methods */
2653 /* Get settings (phy address, speed) for ethtools */
2654 int mvneta_ethtool_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2656 struct mvneta_port *pp = netdev_priv(dev);
2661 return phy_ethtool_gset(pp->phy_dev, cmd);
2664 /* Set settings (phy address, speed) for ethtools */
2665 int mvneta_ethtool_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2667 struct mvneta_port *pp = netdev_priv(dev);
2672 return phy_ethtool_sset(pp->phy_dev, cmd);
2675 /* Set interrupt coalescing for ethtools */
2676 static int mvneta_ethtool_set_coalesce(struct net_device *dev,
2677 struct ethtool_coalesce *c)
2679 struct mvneta_port *pp = netdev_priv(dev);
2682 for (queue = 0; queue < rxq_number; queue++) {
2683 struct mvneta_rx_queue *rxq = &pp->rxqs[queue];
2684 rxq->time_coal = c->rx_coalesce_usecs;
2685 rxq->pkts_coal = c->rx_max_coalesced_frames;
2686 mvneta_rx_pkts_coal_set(pp, rxq, rxq->pkts_coal);
2687 mvneta_rx_time_coal_set(pp, rxq, rxq->time_coal);
2690 for (queue = 0; queue < txq_number; queue++) {
2691 struct mvneta_tx_queue *txq = &pp->txqs[queue];
2692 txq->done_pkts_coal = c->tx_max_coalesced_frames;
2693 mvneta_tx_done_pkts_coal_set(pp, txq, txq->done_pkts_coal);
2699 /* get coalescing for ethtools */
2700 static int mvneta_ethtool_get_coalesce(struct net_device *dev,
2701 struct ethtool_coalesce *c)
2703 struct mvneta_port *pp = netdev_priv(dev);
2705 c->rx_coalesce_usecs = pp->rxqs[0].time_coal;
2706 c->rx_max_coalesced_frames = pp->rxqs[0].pkts_coal;
2708 c->tx_max_coalesced_frames = pp->txqs[0].done_pkts_coal;
2713 static void mvneta_ethtool_get_drvinfo(struct net_device *dev,
2714 struct ethtool_drvinfo *drvinfo)
2716 strlcpy(drvinfo->driver, MVNETA_DRIVER_NAME,
2717 sizeof(drvinfo->driver));
2718 strlcpy(drvinfo->version, MVNETA_DRIVER_VERSION,
2719 sizeof(drvinfo->version));
2720 strlcpy(drvinfo->bus_info, dev_name(&dev->dev),
2721 sizeof(drvinfo->bus_info));
2725 static void mvneta_ethtool_get_ringparam(struct net_device *netdev,
2726 struct ethtool_ringparam *ring)
2728 struct mvneta_port *pp = netdev_priv(netdev);
2730 ring->rx_max_pending = MVNETA_MAX_RXD;
2731 ring->tx_max_pending = MVNETA_MAX_TXD;
2732 ring->rx_pending = pp->rx_ring_size;
2733 ring->tx_pending = pp->tx_ring_size;
2736 static int mvneta_ethtool_set_ringparam(struct net_device *dev,
2737 struct ethtool_ringparam *ring)
2739 struct mvneta_port *pp = netdev_priv(dev);
2741 if ((ring->rx_pending == 0) || (ring->tx_pending == 0))
2743 pp->rx_ring_size = ring->rx_pending < MVNETA_MAX_RXD ?
2744 ring->rx_pending : MVNETA_MAX_RXD;
2745 pp->tx_ring_size = ring->tx_pending < MVNETA_MAX_TXD ?
2746 ring->tx_pending : MVNETA_MAX_TXD;
2748 if (netif_running(dev)) {
2750 if (mvneta_open(dev)) {
2752 "error on opening device after ring param change\n");
2760 static const struct net_device_ops mvneta_netdev_ops = {
2761 .ndo_open = mvneta_open,
2762 .ndo_stop = mvneta_stop,
2763 .ndo_start_xmit = mvneta_tx,
2764 .ndo_set_rx_mode = mvneta_set_rx_mode,
2765 .ndo_set_mac_address = mvneta_set_mac_addr,
2766 .ndo_change_mtu = mvneta_change_mtu,
2767 .ndo_get_stats64 = mvneta_get_stats64,
2768 .ndo_do_ioctl = mvneta_ioctl,
2771 const struct ethtool_ops mvneta_eth_tool_ops = {
2772 .get_link = ethtool_op_get_link,
2773 .get_settings = mvneta_ethtool_get_settings,
2774 .set_settings = mvneta_ethtool_set_settings,
2775 .set_coalesce = mvneta_ethtool_set_coalesce,
2776 .get_coalesce = mvneta_ethtool_get_coalesce,
2777 .get_drvinfo = mvneta_ethtool_get_drvinfo,
2778 .get_ringparam = mvneta_ethtool_get_ringparam,
2779 .set_ringparam = mvneta_ethtool_set_ringparam,
2783 static int mvneta_init(struct device *dev, struct mvneta_port *pp)
2788 mvneta_port_disable(pp);
2790 /* Set port default values */
2791 mvneta_defaults_set(pp);
2793 pp->txqs = devm_kcalloc(dev, txq_number, sizeof(struct mvneta_tx_queue),
2798 /* Initialize TX descriptor rings */
2799 for (queue = 0; queue < txq_number; queue++) {
2800 struct mvneta_tx_queue *txq = &pp->txqs[queue];
2802 txq->size = pp->tx_ring_size;
2803 txq->done_pkts_coal = MVNETA_TXDONE_COAL_PKTS;
2806 pp->rxqs = devm_kcalloc(dev, rxq_number, sizeof(struct mvneta_rx_queue),
2811 /* Create Rx descriptor rings */
2812 for (queue = 0; queue < rxq_number; queue++) {
2813 struct mvneta_rx_queue *rxq = &pp->rxqs[queue];
2815 rxq->size = pp->rx_ring_size;
2816 rxq->pkts_coal = MVNETA_RX_COAL_PKTS;
2817 rxq->time_coal = MVNETA_RX_COAL_USEC;
2823 /* platform glue : initialize decoding windows */
2824 static void mvneta_conf_mbus_windows(struct mvneta_port *pp,
2825 const struct mbus_dram_target_info *dram)
2831 for (i = 0; i < 6; i++) {
2832 mvreg_write(pp, MVNETA_WIN_BASE(i), 0);
2833 mvreg_write(pp, MVNETA_WIN_SIZE(i), 0);
2836 mvreg_write(pp, MVNETA_WIN_REMAP(i), 0);
2842 for (i = 0; i < dram->num_cs; i++) {
2843 const struct mbus_dram_window *cs = dram->cs + i;
2844 mvreg_write(pp, MVNETA_WIN_BASE(i), (cs->base & 0xffff0000) |
2845 (cs->mbus_attr << 8) | dram->mbus_dram_target_id);
2847 mvreg_write(pp, MVNETA_WIN_SIZE(i),
2848 (cs->size - 1) & 0xffff0000);
2850 win_enable &= ~(1 << i);
2851 win_protect |= 3 << (2 * i);
2854 mvreg_write(pp, MVNETA_BASE_ADDR_ENABLE, win_enable);
2857 /* Power up the port */
2858 static int mvneta_port_power_up(struct mvneta_port *pp, int phy_mode)
2862 /* MAC Cause register should be cleared */
2863 mvreg_write(pp, MVNETA_UNIT_INTR_CAUSE, 0);
2865 ctrl = mvreg_read(pp, MVNETA_GMAC_CTRL_2);
2867 /* Even though it might look weird, when we're configured in
2868 * SGMII or QSGMII mode, the RGMII bit needs to be set.
2871 case PHY_INTERFACE_MODE_QSGMII:
2872 mvreg_write(pp, MVNETA_SERDES_CFG, MVNETA_QSGMII_SERDES_PROTO);
2873 ctrl |= MVNETA_GMAC2_PCS_ENABLE | MVNETA_GMAC2_PORT_RGMII;
2875 case PHY_INTERFACE_MODE_SGMII:
2876 mvreg_write(pp, MVNETA_SERDES_CFG, MVNETA_SGMII_SERDES_PROTO);
2877 ctrl |= MVNETA_GMAC2_PCS_ENABLE | MVNETA_GMAC2_PORT_RGMII;
2879 case PHY_INTERFACE_MODE_RGMII:
2880 case PHY_INTERFACE_MODE_RGMII_ID:
2881 ctrl |= MVNETA_GMAC2_PORT_RGMII;
2887 /* Cancel Port Reset */
2888 ctrl &= ~MVNETA_GMAC2_PORT_RESET;
2889 mvreg_write(pp, MVNETA_GMAC_CTRL_2, ctrl);
2891 while ((mvreg_read(pp, MVNETA_GMAC_CTRL_2) &
2892 MVNETA_GMAC2_PORT_RESET) != 0)
2898 /* Device initialization routine */
2899 static int mvneta_probe(struct platform_device *pdev)
2901 const struct mbus_dram_target_info *dram_target_info;
2902 struct resource *res;
2903 struct device_node *dn = pdev->dev.of_node;
2904 struct device_node *phy_node;
2905 struct mvneta_port *pp;
2906 struct net_device *dev;
2907 const char *dt_mac_addr;
2908 char hw_mac_addr[ETH_ALEN];
2909 const char *mac_from;
2913 /* Our multiqueue support is not complete, so for now, only
2914 * allow the usage of the first RX queue
2917 dev_err(&pdev->dev, "Invalid rxq_def argument: %d\n", rxq_def);
2921 dev = alloc_etherdev_mqs(sizeof(struct mvneta_port), txq_number, rxq_number);
2925 dev->irq = irq_of_parse_and_map(dn, 0);
2926 if (dev->irq == 0) {
2928 goto err_free_netdev;
2931 phy_node = of_parse_phandle(dn, "phy", 0);
2933 if (!of_phy_is_fixed_link(dn)) {
2934 dev_err(&pdev->dev, "no PHY specified\n");
2939 err = of_phy_register_fixed_link(dn);
2941 dev_err(&pdev->dev, "cannot register fixed PHY\n");
2945 /* In the case of a fixed PHY, the DT node associated
2946 * to the PHY is the Ethernet MAC DT node.
2951 phy_mode = of_get_phy_mode(dn);
2953 dev_err(&pdev->dev, "incorrect phy-mode\n");
2958 dev->tx_queue_len = MVNETA_MAX_TXD;
2959 dev->watchdog_timeo = 5 * HZ;
2960 dev->netdev_ops = &mvneta_netdev_ops;
2962 dev->ethtool_ops = &mvneta_eth_tool_ops;
2964 pp = netdev_priv(dev);
2965 pp->phy_node = phy_node;
2966 pp->phy_interface = phy_mode;
2968 pp->clk = devm_clk_get(&pdev->dev, NULL);
2969 if (IS_ERR(pp->clk)) {
2970 err = PTR_ERR(pp->clk);
2974 clk_prepare_enable(pp->clk);
2976 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2977 pp->base = devm_ioremap_resource(&pdev->dev, res);
2978 if (IS_ERR(pp->base)) {
2979 err = PTR_ERR(pp->base);
2983 /* Alloc per-cpu stats */
2984 pp->stats = netdev_alloc_pcpu_stats(struct mvneta_pcpu_stats);
2990 dt_mac_addr = of_get_mac_address(dn);
2992 mac_from = "device tree";
2993 memcpy(dev->dev_addr, dt_mac_addr, ETH_ALEN);
2995 mvneta_get_mac_addr(pp, hw_mac_addr);
2996 if (is_valid_ether_addr(hw_mac_addr)) {
2997 mac_from = "hardware";
2998 memcpy(dev->dev_addr, hw_mac_addr, ETH_ALEN);
3000 mac_from = "random";
3001 eth_hw_addr_random(dev);
3005 pp->tx_ring_size = MVNETA_MAX_TXD;
3006 pp->rx_ring_size = MVNETA_MAX_RXD;
3009 SET_NETDEV_DEV(dev, &pdev->dev);
3011 err = mvneta_init(&pdev->dev, pp);
3013 goto err_free_stats;
3015 err = mvneta_port_power_up(pp, phy_mode);
3017 dev_err(&pdev->dev, "can't power up port\n");
3018 goto err_free_stats;
3021 dram_target_info = mv_mbus_dram_info();
3022 if (dram_target_info)
3023 mvneta_conf_mbus_windows(pp, dram_target_info);
3025 netif_napi_add(dev, &pp->napi, mvneta_poll, NAPI_POLL_WEIGHT);
3027 dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO;
3028 dev->hw_features |= dev->features;
3029 dev->vlan_features |= dev->features;
3030 dev->priv_flags |= IFF_UNICAST_FLT;
3032 err = register_netdev(dev);
3034 dev_err(&pdev->dev, "failed to register\n");
3035 goto err_free_stats;
3038 netdev_info(dev, "Using %s mac address %pM\n", mac_from,
3041 platform_set_drvdata(pdev, pp->dev);
3046 free_percpu(pp->stats);
3048 clk_disable_unprepare(pp->clk);
3050 irq_dispose_mapping(dev->irq);
3056 /* Device removal routine */
3057 static int mvneta_remove(struct platform_device *pdev)
3059 struct net_device *dev = platform_get_drvdata(pdev);
3060 struct mvneta_port *pp = netdev_priv(dev);
3062 unregister_netdev(dev);
3063 clk_disable_unprepare(pp->clk);
3064 free_percpu(pp->stats);
3065 irq_dispose_mapping(dev->irq);
3071 static const struct of_device_id mvneta_match[] = {
3072 { .compatible = "marvell,armada-370-neta" },
3075 MODULE_DEVICE_TABLE(of, mvneta_match);
3077 static struct platform_driver mvneta_driver = {
3078 .probe = mvneta_probe,
3079 .remove = mvneta_remove,
3081 .name = MVNETA_DRIVER_NAME,
3082 .of_match_table = mvneta_match,
3086 module_platform_driver(mvneta_driver);
3088 MODULE_DESCRIPTION("Marvell NETA Ethernet Driver - www.marvell.com");
3089 MODULE_AUTHOR("Rami Rosen <rosenr@marvell.com>, Thomas Petazzoni <thomas.petazzoni@free-electrons.com>");
3090 MODULE_LICENSE("GPL");
3092 module_param(rxq_number, int, S_IRUGO);
3093 module_param(txq_number, int, S_IRUGO);
3095 module_param(rxq_def, int, S_IRUGO);
3096 module_param(rx_copybreak, int, S_IRUGO | S_IWUSR);