1 #ifndef __MV643XX_ETH_H__
2 #define __MV643XX_ETH_H__
4 #include <linux/module.h>
5 #include <linux/kernel.h>
6 #include <linux/spinlock.h>
7 #include <linux/workqueue.h>
10 #include <linux/mv643xx.h>
12 #include <asm/dma-mapping.h>
14 /* Checksum offload for Tx works for most packets, but
15 * fails if previous packet sent did not use hw csum
17 #define MV643XX_CHECKSUM_OFFLOAD_TX
19 #define MV643XX_TX_FAST_REFILL
23 * Number of RX / TX descriptors on RX / TX rings.
24 * Note that allocating RX descriptors is done by allocating the RX
25 * ring AND a preallocated RX buffers (skb's) for each descriptor.
26 * The TX descriptors only allocates the TX descriptors ring,
27 * with no pre allocated TX buffers (skb's are allocated by higher layers.
30 /* Default TX ring size is 1000 descriptors */
31 #define MV643XX_DEFAULT_TX_QUEUE_SIZE 1000
33 /* Default RX ring size is 400 descriptors */
34 #define MV643XX_DEFAULT_RX_QUEUE_SIZE 400
36 #define MV643XX_TX_COAL 100
38 #define MV643XX_RX_COAL 100
41 #ifdef MV643XX_CHECKSUM_OFFLOAD_TX
42 #define MAX_DESCS_PER_SKB (MAX_SKB_FRAGS + 1)
44 #define MAX_DESCS_PER_SKB 1
47 #define ETH_VLAN_HLEN 4
49 #define ETH_HW_IP_ALIGN 2 /* hw aligns IP header */
50 #define ETH_WRAPPER_LEN (ETH_HW_IP_ALIGN + ETH_HLEN + \
51 ETH_VLAN_HLEN + ETH_FCS_LEN)
52 #define ETH_RX_SKB_SIZE (dev->mtu + ETH_WRAPPER_LEN + dma_get_cache_alignment())
54 #define ETH_RX_QUEUES_ENABLED (1 << 0) /* use only Q0 for receive */
55 #define ETH_TX_QUEUES_ENABLED (1 << 0) /* use only Q0 for transmit */
57 #define ETH_INT_CAUSE_RX_DONE (ETH_RX_QUEUES_ENABLED << 2)
58 #define ETH_INT_CAUSE_RX_ERROR (ETH_RX_QUEUES_ENABLED << 9)
59 #define ETH_INT_CAUSE_RX (ETH_INT_CAUSE_RX_DONE | ETH_INT_CAUSE_RX_ERROR)
60 #define ETH_INT_CAUSE_EXT 0x00000002
61 #define ETH_INT_UNMASK_ALL (ETH_INT_CAUSE_RX | ETH_INT_CAUSE_EXT)
63 #define ETH_INT_CAUSE_TX_DONE (ETH_TX_QUEUES_ENABLED << 0)
64 #define ETH_INT_CAUSE_TX_ERROR (ETH_TX_QUEUES_ENABLED << 8)
65 #define ETH_INT_CAUSE_TX (ETH_INT_CAUSE_TX_DONE | ETH_INT_CAUSE_TX_ERROR)
66 #define ETH_INT_CAUSE_PHY 0x00010000
67 #define ETH_INT_UNMASK_ALL_EXT (ETH_INT_CAUSE_TX | ETH_INT_CAUSE_PHY)
69 #define ETH_INT_MASK_ALL 0x00000000
70 #define ETH_INT_MASK_ALL_EXT 0x00000000
72 #define PHY_WAIT_ITERATIONS 1000 /* 1000 iterations * 10uS = 10mS max */
73 #define PHY_WAIT_MICRO_SECONDS 10
75 /* Buffer offset from buffer pointer */
76 #define RX_BUF_OFFSET 0x2
78 /* Gigabit Ethernet Unit Global Registers */
80 /* MIB Counters register definitions */
81 #define ETH_MIB_GOOD_OCTETS_RECEIVED_LOW 0x0
82 #define ETH_MIB_GOOD_OCTETS_RECEIVED_HIGH 0x4
83 #define ETH_MIB_BAD_OCTETS_RECEIVED 0x8
84 #define ETH_MIB_INTERNAL_MAC_TRANSMIT_ERR 0xc
85 #define ETH_MIB_GOOD_FRAMES_RECEIVED 0x10
86 #define ETH_MIB_BAD_FRAMES_RECEIVED 0x14
87 #define ETH_MIB_BROADCAST_FRAMES_RECEIVED 0x18
88 #define ETH_MIB_MULTICAST_FRAMES_RECEIVED 0x1c
89 #define ETH_MIB_FRAMES_64_OCTETS 0x20
90 #define ETH_MIB_FRAMES_65_TO_127_OCTETS 0x24
91 #define ETH_MIB_FRAMES_128_TO_255_OCTETS 0x28
92 #define ETH_MIB_FRAMES_256_TO_511_OCTETS 0x2c
93 #define ETH_MIB_FRAMES_512_TO_1023_OCTETS 0x30
94 #define ETH_MIB_FRAMES_1024_TO_MAX_OCTETS 0x34
95 #define ETH_MIB_GOOD_OCTETS_SENT_LOW 0x38
96 #define ETH_MIB_GOOD_OCTETS_SENT_HIGH 0x3c
97 #define ETH_MIB_GOOD_FRAMES_SENT 0x40
98 #define ETH_MIB_EXCESSIVE_COLLISION 0x44
99 #define ETH_MIB_MULTICAST_FRAMES_SENT 0x48
100 #define ETH_MIB_BROADCAST_FRAMES_SENT 0x4c
101 #define ETH_MIB_UNREC_MAC_CONTROL_RECEIVED 0x50
102 #define ETH_MIB_FC_SENT 0x54
103 #define ETH_MIB_GOOD_FC_RECEIVED 0x58
104 #define ETH_MIB_BAD_FC_RECEIVED 0x5c
105 #define ETH_MIB_UNDERSIZE_RECEIVED 0x60
106 #define ETH_MIB_FRAGMENTS_RECEIVED 0x64
107 #define ETH_MIB_OVERSIZE_RECEIVED 0x68
108 #define ETH_MIB_JABBER_RECEIVED 0x6c
109 #define ETH_MIB_MAC_RECEIVE_ERROR 0x70
110 #define ETH_MIB_BAD_CRC_EVENT 0x74
111 #define ETH_MIB_COLLISION 0x78
112 #define ETH_MIB_LATE_COLLISION 0x7c
114 /* Port serial status reg (PSR) */
115 #define ETH_INTERFACE_PCM 0x00000001
116 #define ETH_LINK_IS_UP 0x00000002
117 #define ETH_PORT_AT_FULL_DUPLEX 0x00000004
118 #define ETH_RX_FLOW_CTRL_ENABLED 0x00000008
119 #define ETH_GMII_SPEED_1000 0x00000010
120 #define ETH_MII_SPEED_100 0x00000020
121 #define ETH_TX_IN_PROGRESS 0x00000080
122 #define ETH_BYPASS_ACTIVE 0x00000100
123 #define ETH_PORT_AT_PARTITION_STATE 0x00000200
124 #define ETH_PORT_TX_FIFO_EMPTY 0x00000400
127 #define ETH_SMI_BUSY 0x10000000 /* 0 - Write, 1 - Read */
128 #define ETH_SMI_READ_VALID 0x08000000 /* 0 - Write, 1 - Read */
129 #define ETH_SMI_OPCODE_WRITE 0 /* Completion of Read */
130 #define ETH_SMI_OPCODE_READ 0x04000000 /* Operation is in progress */
132 /* Interrupt Cause Register Bit Definitions */
134 /* SDMA command status fields macros */
136 /* Tx & Rx descriptors status */
137 #define ETH_ERROR_SUMMARY 0x00000001
139 /* Tx & Rx descriptors command */
140 #define ETH_BUFFER_OWNED_BY_DMA 0x80000000
142 /* Tx descriptors status */
143 #define ETH_LC_ERROR 0
144 #define ETH_UR_ERROR 0x00000002
145 #define ETH_RL_ERROR 0x00000004
146 #define ETH_LLC_SNAP_FORMAT 0x00000200
148 /* Rx descriptors status */
149 #define ETH_OVERRUN_ERROR 0x00000002
150 #define ETH_MAX_FRAME_LENGTH_ERROR 0x00000004
151 #define ETH_RESOURCE_ERROR 0x00000006
152 #define ETH_VLAN_TAGGED 0x00080000
153 #define ETH_BPDU_FRAME 0x00100000
154 #define ETH_UDP_FRAME_OVER_IP_V_4 0x00200000
155 #define ETH_OTHER_FRAME_TYPE 0x00400000
156 #define ETH_LAYER_2_IS_ETH_V_2 0x00800000
157 #define ETH_FRAME_TYPE_IP_V_4 0x01000000
158 #define ETH_FRAME_HEADER_OK 0x02000000
159 #define ETH_RX_LAST_DESC 0x04000000
160 #define ETH_RX_FIRST_DESC 0x08000000
161 #define ETH_UNKNOWN_DESTINATION_ADDR 0x10000000
162 #define ETH_RX_ENABLE_INTERRUPT 0x20000000
163 #define ETH_LAYER_4_CHECKSUM_OK 0x40000000
165 /* Rx descriptors byte count */
166 #define ETH_FRAME_FRAGMENTED 0x00000004
168 /* Tx descriptors command */
169 #define ETH_LAYER_4_CHECKSUM_FIRST_DESC 0x00000400
170 #define ETH_FRAME_SET_TO_VLAN 0x00008000
171 #define ETH_UDP_FRAME 0x00010000
172 #define ETH_GEN_TCP_UDP_CHECKSUM 0x00020000
173 #define ETH_GEN_IP_V_4_CHECKSUM 0x00040000
174 #define ETH_ZERO_PADDING 0x00080000
175 #define ETH_TX_LAST_DESC 0x00100000
176 #define ETH_TX_FIRST_DESC 0x00200000
177 #define ETH_GEN_CRC 0x00400000
178 #define ETH_TX_ENABLE_INTERRUPT 0x00800000
179 #define ETH_AUTO_MODE 0x40000000
181 #define ETH_TX_IHL_SHIFT 11
185 typedef enum _eth_func_ret_status {
186 ETH_OK, /* Returned as expected. */
187 ETH_ERROR, /* Fundamental error. */
188 ETH_RETRY, /* Could not process request. Try later.*/
189 ETH_END_OF_JOB, /* Ring has nothing to process. */
190 ETH_QUEUE_FULL, /* Ring resource error. */
191 ETH_QUEUE_LAST_RESOURCE /* Ring resources about to exhaust. */
192 } ETH_FUNC_RET_STATUS;
194 typedef enum _eth_target {
202 /* These are for big-endian machines. Little endian needs different
205 #if defined(__BIG_ENDIAN)
207 u16 byte_cnt; /* Descriptor buffer byte count */
208 u16 buf_size; /* Buffer size */
209 u32 cmd_sts; /* Descriptor command status */
210 u32 next_desc_ptr; /* Next descriptor pointer */
211 u32 buf_ptr; /* Descriptor buffer pointer */
215 u16 byte_cnt; /* buffer byte count */
216 u16 l4i_chk; /* CPU provided TCP checksum */
217 u32 cmd_sts; /* Command/status field */
218 u32 next_desc_ptr; /* Pointer to next descriptor */
219 u32 buf_ptr; /* pointer to buffer for this descriptor*/
222 #elif defined(__LITTLE_ENDIAN)
224 u32 cmd_sts; /* Descriptor command status */
225 u16 buf_size; /* Buffer size */
226 u16 byte_cnt; /* Descriptor buffer byte count */
227 u32 buf_ptr; /* Descriptor buffer pointer */
228 u32 next_desc_ptr; /* Next descriptor pointer */
232 u32 cmd_sts; /* Command/status field */
233 u16 l4i_chk; /* CPU provided TCP checksum */
234 u16 byte_cnt; /* buffer byte count */
235 u32 buf_ptr; /* pointer to buffer for this descriptor*/
236 u32 next_desc_ptr; /* Pointer to next descriptor */
239 #error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
242 /* Unified struct for Rx and Tx operations. The user is not required to */
243 /* be familier with neither Tx nor Rx descriptors. */
245 unsigned short byte_cnt; /* Descriptor buffer byte count */
246 unsigned short l4i_chk; /* Tx CPU provided TCP Checksum */
247 unsigned int cmd_sts; /* Descriptor command status */
248 dma_addr_t buf_ptr; /* Descriptor buffer pointer */
249 struct sk_buff *return_info; /* User resource return information */
252 /* Ethernet port specific information */
254 struct mv643xx_mib_counters {
255 u64 good_octets_received;
256 u32 bad_octets_received;
257 u32 internal_mac_transmit_err;
258 u32 good_frames_received;
259 u32 bad_frames_received;
260 u32 broadcast_frames_received;
261 u32 multicast_frames_received;
262 u32 frames_64_octets;
263 u32 frames_65_to_127_octets;
264 u32 frames_128_to_255_octets;
265 u32 frames_256_to_511_octets;
266 u32 frames_512_to_1023_octets;
267 u32 frames_1024_to_max_octets;
268 u64 good_octets_sent;
269 u32 good_frames_sent;
270 u32 excessive_collision;
271 u32 multicast_frames_sent;
272 u32 broadcast_frames_sent;
273 u32 unrec_mac_control_received;
275 u32 good_fc_received;
277 u32 undersize_received;
278 u32 fragments_received;
279 u32 oversize_received;
281 u32 mac_receive_error;
287 struct mv643xx_private {
288 int port_num; /* User Ethernet port number */
290 u32 rx_sram_addr; /* Base address of rx sram area */
291 u32 rx_sram_size; /* Size of rx sram area */
292 u32 tx_sram_addr; /* Base address of tx sram area */
293 u32 tx_sram_size; /* Size of tx sram area */
295 int rx_resource_err; /* Rx ring resource error flag */
297 /* Tx/Rx rings managment indexes fields. For driver use */
299 /* Next available and first returning Rx resource */
300 int rx_curr_desc_q, rx_used_desc_q;
302 /* Next available and first returning Tx resource */
303 int tx_curr_desc_q, tx_used_desc_q;
305 #ifdef MV643XX_TX_FAST_REFILL
306 u32 tx_clean_threshold;
309 struct eth_rx_desc *p_rx_desc_area;
310 dma_addr_t rx_desc_dma;
311 int rx_desc_area_size;
312 struct sk_buff **rx_skb;
314 struct eth_tx_desc *p_tx_desc_area;
315 dma_addr_t tx_desc_dma;
316 int tx_desc_area_size;
317 struct sk_buff **tx_skb;
319 struct work_struct tx_timeout_task;
321 struct net_device_stats stats;
322 struct mv643xx_mib_counters mib_counters;
324 /* Size of Tx Ring per queue */
326 /* Number of tx descriptors in use */
328 /* Size of Rx Ring per queue */
330 /* Number of rx descriptors in use */
334 * Used in case RX Ring is empty, which can be caused when
335 * system does not have resources (skb's)
337 struct timer_list timeout;
341 struct mii_if_info mii;
344 /* Port operation control routines */
345 static void eth_port_init(struct mv643xx_private *mp);
346 static void eth_port_reset(unsigned int eth_port_num);
347 static void eth_port_start(struct net_device *dev);
349 /* PHY and MIB routines */
350 static void ethernet_phy_reset(unsigned int eth_port_num);
352 static void eth_port_write_smi_reg(unsigned int eth_port_num,
353 unsigned int phy_reg, unsigned int value);
355 static void eth_port_read_smi_reg(unsigned int eth_port_num,
356 unsigned int phy_reg, unsigned int *value);
358 static void eth_clear_mib_counters(unsigned int eth_port_num);
360 /* Port data flow control routines */
361 static ETH_FUNC_RET_STATUS eth_port_receive(struct mv643xx_private *mp,
362 struct pkt_info *p_pkt_info);
363 static ETH_FUNC_RET_STATUS eth_rx_return_buff(struct mv643xx_private *mp,
364 struct pkt_info *p_pkt_info);
366 #endif /* __MV643XX_ETH_H__ */