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xilinx_axienet.h

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linux-6.19.14/drivers/net/ethernet/xilinx/xilinx_axienet.h C 
  1/* SPDX-License-Identifier: GPL-2.0 */
  2/*
  3 * Definitions for Xilinx Axi Ethernet device driver.
  4 *
  5 * Copyright (c) 2009 Secret Lab Technologies, Ltd.
  6 * Copyright (c) 2010 - 2012 Xilinx, Inc. All rights reserved.
  7 */
  8
  9#ifndef XILINX_AXIENET_H
 10#define XILINX_AXIENET_H
 11
 12#include <linux/dim.h>
 13#include <linux/netdevice.h>
 14#include <linux/spinlock.h>
 15#include <linux/interrupt.h>
 16#include <linux/if_vlan.h>
 17#include <linux/phylink.h>
 18#include <linux/skbuff.h>
 19
 20/* Packet size info */
 21#define XAE_HDR_SIZE			14 /* Size of Ethernet header */
 22#define XAE_TRL_SIZE			 4 /* Size of Ethernet trailer (FCS) */
 23#define XAE_MTU			      1500 /* Max MTU of an Ethernet frame */
 24#define XAE_JUMBO_MTU		      9000 /* Max MTU of a jumbo Eth. frame */
 25
 26#define XAE_MAX_FRAME_SIZE	 (XAE_MTU + XAE_HDR_SIZE + XAE_TRL_SIZE)
 27#define XAE_MAX_VLAN_FRAME_SIZE  (XAE_MTU + VLAN_ETH_HLEN + XAE_TRL_SIZE)
 28#define XAE_MAX_JUMBO_FRAME_SIZE (XAE_JUMBO_MTU + XAE_HDR_SIZE + XAE_TRL_SIZE)
 29
 30/* Configuration options */
 31
 32/* Accept all incoming packets. Default: disabled (cleared) */
 33#define XAE_OPTION_PROMISC			BIT(0)
 34
 35/* Jumbo frame support for Tx & Rx. Default: disabled (cleared) */
 36#define XAE_OPTION_JUMBO			BIT(1)
 37
 38/* VLAN Rx & Tx frame support. Default: disabled (cleared) */
 39#define XAE_OPTION_VLAN				BIT(2)
 40
 41/* Enable recognition of flow control frames on Rx. Default: enabled (set) */
 42#define XAE_OPTION_FLOW_CONTROL			BIT(4)
 43
 44/* Strip FCS and PAD from incoming frames. Note: PAD from VLAN frames is not
 45 * stripped. Default: disabled (set)
 46 */
 47#define XAE_OPTION_FCS_STRIP			BIT(5)
 48
 49/* Generate FCS field and add PAD automatically for outgoing frames.
 50 * Default: enabled (set)
 51 */
 52#define XAE_OPTION_FCS_INSERT			BIT(6)
 53
 54/* Enable Length/Type error checking for incoming frames. When this option is
 55 * set, the MAC will filter frames that have a mismatched type/length field
 56 * and if XAE_OPTION_REPORT_RXERR is set, the user is notified when these
 57 * types of frames are encountered. When this option is cleared, the MAC will
 58 * allow these types of frames to be received. Default: enabled (set)
 59 */
 60#define XAE_OPTION_LENTYPE_ERR			BIT(7)
 61
 62/* Enable the transmitter. Default: enabled (set) */
 63#define XAE_OPTION_TXEN				BIT(11)
 64
 65/*  Enable the receiver. Default: enabled (set) */
 66#define XAE_OPTION_RXEN				BIT(12)
 67
 68/*  Default options set when device is initialized or reset */
 69#define XAE_OPTION_DEFAULTS				   \
 70				(XAE_OPTION_TXEN |	   \
 71				 XAE_OPTION_FLOW_CONTROL | \
 72				 XAE_OPTION_RXEN)
 73
 74/* Axi DMA Register definitions */
 75
 76#define XAXIDMA_TX_CR_OFFSET	0x00000000 /* Channel control */
 77#define XAXIDMA_TX_SR_OFFSET	0x00000004 /* Status */
 78#define XAXIDMA_TX_CDESC_OFFSET	0x00000008 /* Current descriptor pointer */
 79#define XAXIDMA_TX_TDESC_OFFSET	0x00000010 /* Tail descriptor pointer */
 80
 81#define XAXIDMA_RX_CR_OFFSET	0x00000030 /* Channel control */
 82#define XAXIDMA_RX_SR_OFFSET	0x00000034 /* Status */
 83#define XAXIDMA_RX_CDESC_OFFSET	0x00000038 /* Current descriptor pointer */
 84#define XAXIDMA_RX_TDESC_OFFSET	0x00000040 /* Tail descriptor pointer */
 85
 86#define XAXIDMA_CR_RUNSTOP_MASK	0x00000001 /* Start/stop DMA channel */
 87#define XAXIDMA_CR_RESET_MASK	0x00000004 /* Reset DMA engine */
 88
 89#define XAXIDMA_SR_HALT_MASK	0x00000001 /* Indicates DMA channel halted */
 90
 91#define XAXIDMA_BD_NDESC_OFFSET		0x00 /* Next descriptor pointer */
 92#define XAXIDMA_BD_BUFA_OFFSET		0x08 /* Buffer address */
 93#define XAXIDMA_BD_CTRL_LEN_OFFSET	0x18 /* Control/buffer length */
 94#define XAXIDMA_BD_STS_OFFSET		0x1C /* Status */
 95#define XAXIDMA_BD_USR0_OFFSET		0x20 /* User IP specific word0 */
 96#define XAXIDMA_BD_USR1_OFFSET		0x24 /* User IP specific word1 */
 97#define XAXIDMA_BD_USR2_OFFSET		0x28 /* User IP specific word2 */
 98#define XAXIDMA_BD_USR3_OFFSET		0x2C /* User IP specific word3 */
 99#define XAXIDMA_BD_USR4_OFFSET		0x30 /* User IP specific word4 */
100#define XAXIDMA_BD_ID_OFFSET		0x34 /* Sw ID */
101#define XAXIDMA_BD_HAS_STSCNTRL_OFFSET	0x38 /* Whether has stscntrl strm */
102#define XAXIDMA_BD_HAS_DRE_OFFSET	0x3C /* Whether has DRE */
103
104#define XAXIDMA_BD_HAS_DRE_SHIFT	8 /* Whether has DRE shift */
105#define XAXIDMA_BD_HAS_DRE_MASK		0xF00 /* Whether has DRE mask */
106#define XAXIDMA_BD_WORDLEN_MASK		0xFF /* Whether has DRE mask */
107
108#define XAXIDMA_BD_CTRL_LENGTH_MASK	GENMASK(25, 0) /* Requested len */
109#define XAXIDMA_BD_CTRL_TXSOF_MASK	0x08000000 /* First tx packet */
110#define XAXIDMA_BD_CTRL_TXEOF_MASK	0x04000000 /* Last tx packet */
111#define XAXIDMA_BD_CTRL_ALL_MASK	0x0C000000 /* All control bits */
112
113#define XAXIDMA_DELAY_MASK		0xFF000000 /* Delay timeout counter */
114#define XAXIDMA_COALESCE_MASK		0x00FF0000 /* Coalesce counter */
115
116#define XAXIDMA_IRQ_IOC_MASK		0x00001000 /* Completion intr */
117#define XAXIDMA_IRQ_DELAY_MASK		0x00002000 /* Delay interrupt */
118#define XAXIDMA_IRQ_ERROR_MASK		0x00004000 /* Error interrupt */
119#define XAXIDMA_IRQ_ALL_MASK		0x00007000 /* All interrupts */
120
121/* Constant to convert delay counts to microseconds */
122#define XAXIDMA_DELAY_SCALE		(125ULL * USEC_PER_SEC)
123
124/* Default TX/RX Threshold and delay timer values for SGDMA mode */
125#define XAXIDMA_DFT_TX_THRESHOLD	24
126#define XAXIDMA_DFT_TX_USEC		50
127#define XAXIDMA_DFT_RX_USEC		16
128
129#define XAXIDMA_BD_CTRL_TXSOF_MASK	0x08000000 /* First tx packet */
130#define XAXIDMA_BD_CTRL_TXEOF_MASK	0x04000000 /* Last tx packet */
131#define XAXIDMA_BD_CTRL_ALL_MASK	0x0C000000 /* All control bits */
132
133#define XAXIDMA_BD_STS_ACTUAL_LEN_MASK	GENMASK(25, 0) /* Actual len */
134#define XAXIDMA_BD_STS_COMPLETE_MASK	0x80000000 /* Completed */
135#define XAXIDMA_BD_STS_DEC_ERR_MASK	0x40000000 /* Decode error */
136#define XAXIDMA_BD_STS_SLV_ERR_MASK	0x20000000 /* Slave error */
137#define XAXIDMA_BD_STS_INT_ERR_MASK	0x10000000 /* Internal err */
138#define XAXIDMA_BD_STS_ALL_ERR_MASK	0x70000000 /* All errors */
139#define XAXIDMA_BD_STS_RXSOF_MASK	0x08000000 /* First rx pkt */
140#define XAXIDMA_BD_STS_RXEOF_MASK	0x04000000 /* Last rx pkt */
141#define XAXIDMA_BD_STS_ALL_MASK		0xFC000000 /* All status bits */
142
143#define XAXIDMA_BD_MINIMUM_ALIGNMENT	0x40
144
145/* Axi Ethernet registers definition */
146#define XAE_RAF_OFFSET		0x00000000 /* Reset and Address filter */
147#define XAE_TPF_OFFSET		0x00000004 /* Tx Pause Frame */
148#define XAE_IFGP_OFFSET		0x00000008 /* Tx Inter-frame gap adjustment*/
149#define XAE_IS_OFFSET		0x0000000C /* Interrupt status */
150#define XAE_IP_OFFSET		0x00000010 /* Interrupt pending */
151#define XAE_IE_OFFSET		0x00000014 /* Interrupt enable */
152#define XAE_TTAG_OFFSET		0x00000018 /* Tx VLAN TAG */
153#define XAE_RTAG_OFFSET		0x0000001C /* Rx VLAN TAG */
154#define XAE_UAWL_OFFSET		0x00000020 /* Unicast address word lower */
155#define XAE_UAWU_OFFSET		0x00000024 /* Unicast address word upper */
156#define XAE_TPID0_OFFSET	0x00000028 /* VLAN TPID0 register */
157#define XAE_TPID1_OFFSET	0x0000002C /* VLAN TPID1 register */
158#define XAE_PPST_OFFSET		0x00000030 /* PCS PMA Soft Temac Status Reg */
159#define XAE_STATS_OFFSET	0x00000200 /* Statistics counters */
160#define XAE_RCW0_OFFSET		0x00000400 /* Rx Configuration Word 0 */
161#define XAE_RCW1_OFFSET		0x00000404 /* Rx Configuration Word 1 */
162#define XAE_TC_OFFSET		0x00000408 /* Tx Configuration */
163#define XAE_FCC_OFFSET		0x0000040C /* Flow Control Configuration */
164#define XAE_EMMC_OFFSET		0x00000410 /* MAC speed configuration */
165#define XAE_PHYC_OFFSET		0x00000414 /* RX Max Frame Configuration */
166#define XAE_ID_OFFSET		0x000004F8 /* Identification register */
167#define XAE_ABILITY_OFFSET	0x000004FC /* Ability Register offset */
168#define XAE_MDIO_MC_OFFSET	0x00000500 /* MDIO Setup */
169#define XAE_MDIO_MCR_OFFSET	0x00000504 /* MDIO Control */
170#define XAE_MDIO_MWD_OFFSET	0x00000508 /* MDIO Write Data */
171#define XAE_MDIO_MRD_OFFSET	0x0000050C /* MDIO Read Data */
172#define XAE_UAW0_OFFSET		0x00000700 /* Unicast address word 0 */
173#define XAE_UAW1_OFFSET		0x00000704 /* Unicast address word 1 */
174#define XAE_FMI_OFFSET		0x00000708 /* Frame Filter Control */
175#define XAE_FFE_OFFSET		0x0000070C /* Frame Filter Enable */
176#define XAE_AF0_OFFSET		0x00000710 /* Address Filter 0 */
177#define XAE_AF1_OFFSET		0x00000714 /* Address Filter 1 */
178#define XAE_AM0_OFFSET		0x00000750 /* Frame Filter Mask Value Bytes 3-0 */
179#define XAE_AM1_OFFSET		0x00000754 /* Frame Filter Mask Value Bytes 7-4 */
180
181#define XAE_TX_VLAN_DATA_OFFSET 0x00004000 /* TX VLAN data table address */
182#define XAE_RX_VLAN_DATA_OFFSET 0x00008000 /* RX VLAN data table address */
183#define XAE_MCAST_TABLE_OFFSET	0x00020000 /* Multicast table address */
184
185/* Bit Masks for Axi Ethernet RAF register */
186/* Reject receive multicast destination address */
187#define XAE_RAF_MCSTREJ_MASK		0x00000002
188/* Reject receive broadcast destination address */
189#define XAE_RAF_BCSTREJ_MASK		0x00000004
190#define XAE_RAF_TXVTAGMODE_MASK		0x00000018 /* Tx VLAN TAG mode */
191#define XAE_RAF_RXVTAGMODE_MASK		0x00000060 /* Rx VLAN TAG mode */
192#define XAE_RAF_TXVSTRPMODE_MASK	0x00000180 /* Tx VLAN STRIP mode */
193#define XAE_RAF_RXVSTRPMODE_MASK	0x00000600 /* Rx VLAN STRIP mode */
194#define XAE_RAF_NEWFNCENBL_MASK		0x00000800 /* New function mode */
195/* Extended Multicast Filtering mode */
196#define XAE_RAF_EMULTIFLTRENBL_MASK	0x00001000
197#define XAE_RAF_STATSRST_MASK		0x00002000 /* Stats. Counter Reset */
198#define XAE_RAF_RXBADFRMEN_MASK		0x00004000 /* Recv Bad Frame Enable */
199#define XAE_RAF_TXVTAGMODE_SHIFT	3 /* Tx Tag mode shift bits */
200#define XAE_RAF_RXVTAGMODE_SHIFT	5 /* Rx Tag mode shift bits */
201#define XAE_RAF_TXVSTRPMODE_SHIFT	7 /* Tx strip mode shift bits*/
202#define XAE_RAF_RXVSTRPMODE_SHIFT	9 /* Rx Strip mode shift bits*/
203
204/* Bit Masks for Axi Ethernet TPF and IFGP registers */
205#define XAE_TPF_TPFV_MASK		0x0000FFFF /* Tx pause frame value */
206/* Transmit inter-frame gap adjustment value */
207#define XAE_IFGP0_IFGP_MASK		0x0000007F
208
209/* Bit Masks for Axi Ethernet IS, IE and IP registers, Same masks apply
210 * for all 3 registers.
211 */
212/* Hard register access complete */
213#define XAE_INT_HARDACSCMPLT_MASK	0x00000001
214/* Auto negotiation complete */
215#define XAE_INT_AUTONEG_MASK		0x00000002
216#define XAE_INT_RXCMPIT_MASK		0x00000004 /* Rx complete */
217#define XAE_INT_RXRJECT_MASK		0x00000008 /* Rx frame rejected */
218#define XAE_INT_RXFIFOOVR_MASK		0x00000010 /* Rx fifo overrun */
219#define XAE_INT_TXCMPIT_MASK		0x00000020 /* Tx complete */
220#define XAE_INT_RXDCMLOCK_MASK		0x00000040 /* Rx Dcm Lock */
221#define XAE_INT_MGTRDY_MASK		0x00000080 /* MGT clock Lock */
222#define XAE_INT_PHYRSTCMPLT_MASK	0x00000100 /* Phy Reset complete */
223#define XAE_INT_ALL_MASK		0x0000003F /* All the ints */
224
225/* INT bits that indicate receive errors */
226#define XAE_INT_RECV_ERROR_MASK				\
227	(XAE_INT_RXRJECT_MASK | XAE_INT_RXFIFOOVR_MASK)
228
229/* Bit masks for Axi Ethernet VLAN TPID Word 0 register */
230#define XAE_TPID_0_MASK		0x0000FFFF /* TPID 0 */
231#define XAE_TPID_1_MASK		0xFFFF0000 /* TPID 1 */
232
233/* Bit masks for Axi Ethernet VLAN TPID Word 1 register */
234#define XAE_TPID_2_MASK		0x0000FFFF /* TPID 0 */
235#define XAE_TPID_3_MASK		0xFFFF0000 /* TPID 1 */
236
237/* Bit masks for Axi Ethernet RCW1 register */
238#define XAE_RCW1_RST_MASK	0x80000000 /* Reset */
239#define XAE_RCW1_JUM_MASK	0x40000000 /* Jumbo frame enable */
240/* In-Band FCS enable (FCS not stripped) */
241#define XAE_RCW1_FCS_MASK	0x20000000
242#define XAE_RCW1_RX_MASK	0x10000000 /* Receiver enable */
243#define XAE_RCW1_VLAN_MASK	0x08000000 /* VLAN frame enable */
244/* Length/type field valid check disable */
245#define XAE_RCW1_LT_DIS_MASK	0x02000000
246/* Control frame Length check disable */
247#define XAE_RCW1_CL_DIS_MASK	0x01000000
248/* Pause frame source address bits [47:32]. Bits [31:0] are
249 * stored in register RCW0
250 */
251#define XAE_RCW1_PAUSEADDR_MASK 0x0000FFFF
252
253/* Bit masks for Axi Ethernet TC register */
254#define XAE_TC_RST_MASK		0x80000000 /* Reset */
255#define XAE_TC_JUM_MASK		0x40000000 /* Jumbo frame enable */
256/* In-Band FCS enable (FCS not generated) */
257#define XAE_TC_FCS_MASK		0x20000000
258#define XAE_TC_TX_MASK		0x10000000 /* Transmitter enable */
259#define XAE_TC_VLAN_MASK	0x08000000 /* VLAN frame enable */
260/* Inter-frame gap adjustment enable */
261#define XAE_TC_IFG_MASK		0x02000000
262
263/* Bit masks for Axi Ethernet FCC register */
264#define XAE_FCC_FCRX_MASK	0x20000000 /* Rx flow control enable */
265#define XAE_FCC_FCTX_MASK	0x40000000 /* Tx flow control enable */
266
267/* Bit masks for Axi Ethernet EMMC register */
268#define XAE_EMMC_LINKSPEED_MASK	0xC0000000 /* Link speed */
269#define XAE_EMMC_RGMII_MASK	0x20000000 /* RGMII mode enable */
270#define XAE_EMMC_SGMII_MASK	0x10000000 /* SGMII mode enable */
271#define XAE_EMMC_GPCS_MASK	0x08000000 /* 1000BaseX mode enable */
272#define XAE_EMMC_HOST_MASK	0x04000000 /* Host interface enable */
273#define XAE_EMMC_TX16BIT	0x02000000 /* 16 bit Tx client enable */
274#define XAE_EMMC_RX16BIT	0x01000000 /* 16 bit Rx client enable */
275#define XAE_EMMC_LINKSPD_10	0x00000000 /* Link Speed mask for 10 Mbit */
276#define XAE_EMMC_LINKSPD_100	0x40000000 /* Link Speed mask for 100 Mbit */
277#define XAE_EMMC_LINKSPD_1000	0x80000000 /* Link Speed mask for 1000 Mbit */
278
279/* Bit masks for Axi Ethernet PHYC register */
280#define XAE_PHYC_SGMIILINKSPEED_MASK	0xC0000000 /* SGMII link speed mask*/
281#define XAE_PHYC_RGMIILINKSPEED_MASK	0x0000000C /* RGMII link speed */
282#define XAE_PHYC_RGMIIHD_MASK		0x00000002 /* RGMII Half-duplex */
283#define XAE_PHYC_RGMIILINK_MASK		0x00000001 /* RGMII link status */
284#define XAE_PHYC_RGLINKSPD_10		0x00000000 /* RGMII link 10 Mbit */
285#define XAE_PHYC_RGLINKSPD_100		0x00000004 /* RGMII link 100 Mbit */
286#define XAE_PHYC_RGLINKSPD_1000		0x00000008 /* RGMII link 1000 Mbit */
287#define XAE_PHYC_SGLINKSPD_10		0x00000000 /* SGMII link 10 Mbit */
288#define XAE_PHYC_SGLINKSPD_100		0x40000000 /* SGMII link 100 Mbit */
289#define XAE_PHYC_SGLINKSPD_1000		0x80000000 /* SGMII link 1000 Mbit */
290
291/* Bit masks for Axi Ethernet ability register */
292#define XAE_ABILITY_PFC			BIT(16)
293#define XAE_ABILITY_FRAME_FILTER	BIT(10)
294#define XAE_ABILITY_HALF_DUPLEX		BIT(9)
295#define XAE_ABILITY_STATS		BIT(8)
296#define XAE_ABILITY_2_5G		BIT(3)
297#define XAE_ABILITY_1G			BIT(2)
298#define XAE_ABILITY_100M		BIT(1)
299#define XAE_ABILITY_10M			BIT(0)
300
301/* Bit masks for Axi Ethernet MDIO interface MC register */
302#define XAE_MDIO_MC_MDIOEN_MASK		0x00000040 /* MII management enable */
303#define XAE_MDIO_MC_CLOCK_DIVIDE_MAX	0x3F	   /* Maximum MDIO divisor */
304
305/* Bit masks for Axi Ethernet MDIO interface MCR register */
306#define XAE_MDIO_MCR_PHYAD_MASK		0x1F000000 /* Phy Address Mask */
307#define XAE_MDIO_MCR_PHYAD_SHIFT	24	   /* Phy Address Shift */
308#define XAE_MDIO_MCR_REGAD_MASK		0x001F0000 /* Reg Address Mask */
309#define XAE_MDIO_MCR_REGAD_SHIFT	16	   /* Reg Address Shift */
310#define XAE_MDIO_MCR_OP_MASK		0x0000C000 /* Operation Code Mask */
311#define XAE_MDIO_MCR_OP_SHIFT		13	   /* Operation Code Shift */
312#define XAE_MDIO_MCR_OP_READ_MASK	0x00008000 /* Op Code Read Mask */
313#define XAE_MDIO_MCR_OP_WRITE_MASK	0x00004000 /* Op Code Write Mask */
314#define XAE_MDIO_MCR_INITIATE_MASK	0x00000800 /* Ready Mask */
315#define XAE_MDIO_MCR_READY_MASK		0x00000080 /* Ready Mask */
316
317/* Bit masks for Axi Ethernet MDIO interface MIS, MIP, MIE, MIC registers */
318#define XAE_MDIO_INT_MIIM_RDY_MASK	0x00000001 /* MIIM Interrupt */
319
320/* Bit masks for Axi Ethernet UAW1 register */
321/* Station address bits [47:32]; Station address
322 * bits [31:0] are stored in register UAW0
323 */
324#define XAE_UAW1_UNICASTADDR_MASK	0x0000FFFF
325
326/* Bit masks for Axi Ethernet FMC register */
327#define XAE_FMI_PM_MASK			0x80000000 /* Promis. mode enable */
328#define XAE_FMI_IND_MASK		0x00000003 /* Index Mask */
329
330#define XAE_MDIO_DIV_DFT		29 /* Default MDIO clock divisor */
331
332/* Defines for different options for C_PHY_TYPE parameter in Axi Ethernet IP */
333#define XAE_PHY_TYPE_MII		0
334#define XAE_PHY_TYPE_GMII		1
335#define XAE_PHY_TYPE_RGMII_1_3		2
336#define XAE_PHY_TYPE_RGMII_2_0		3
337#define XAE_PHY_TYPE_SGMII		4
338#define XAE_PHY_TYPE_1000BASE_X		5
339
340 /* Total number of entries in the hardware multicast table. */
341#define XAE_MULTICAST_CAM_TABLE_NUM	4
342
343/* Axi Ethernet Synthesis features */
344#define XAE_FEATURE_PARTIAL_RX_CSUM	BIT(0)
345#define XAE_FEATURE_PARTIAL_TX_CSUM	BIT(1)
346#define XAE_FEATURE_FULL_RX_CSUM	BIT(2)
347#define XAE_FEATURE_FULL_TX_CSUM	BIT(3)
348#define XAE_FEATURE_DMA_64BIT		BIT(4)
349#define XAE_FEATURE_STATS		BIT(5)
350
351#define XAE_NO_CSUM_OFFLOAD		0
352
353#define XAE_FULL_CSUM_STATUS_MASK	0x00000038
354#define XAE_IP_UDP_CSUM_VALIDATED	0x00000003
355#define XAE_IP_TCP_CSUM_VALIDATED	0x00000002
356
357#define DELAY_OF_ONE_MILLISEC		1000
358
359/* Xilinx PCS/PMA PHY register for switching 1000BaseX or SGMII */
360#define XLNX_MII_STD_SELECT_REG		0x11
361#define XLNX_MII_STD_SELECT_SGMII	BIT(0)
362
363/* enum temac_stat - TEMAC statistics counters
364 *
365 * Index of statistics counters within the TEMAC. This must match the
366 * order/offset of hardware registers exactly.
367 */
368enum temac_stat {
369	STAT_RX_BYTES = 0,
370	STAT_TX_BYTES,
371	STAT_UNDERSIZE_FRAMES,
372	STAT_FRAGMENT_FRAMES,
373	STAT_RX_64_BYTE_FRAMES,
374	STAT_RX_65_127_BYTE_FRAMES,
375	STAT_RX_128_255_BYTE_FRAMES,
376	STAT_RX_256_511_BYTE_FRAMES,
377	STAT_RX_512_1023_BYTE_FRAMES,
378	STAT_RX_1024_MAX_BYTE_FRAMES,
379	STAT_RX_OVERSIZE_FRAMES,
380	STAT_TX_64_BYTE_FRAMES,
381	STAT_TX_65_127_BYTE_FRAMES,
382	STAT_TX_128_255_BYTE_FRAMES,
383	STAT_TX_256_511_BYTE_FRAMES,
384	STAT_TX_512_1023_BYTE_FRAMES,
385	STAT_TX_1024_MAX_BYTE_FRAMES,
386	STAT_TX_OVERSIZE_FRAMES,
387	STAT_RX_GOOD_FRAMES,
388	STAT_RX_FCS_ERRORS,
389	STAT_RX_BROADCAST_FRAMES,
390	STAT_RX_MULTICAST_FRAMES,
391	STAT_RX_CONTROL_FRAMES,
392	STAT_RX_LENGTH_ERRORS,
393	STAT_RX_VLAN_FRAMES,
394	STAT_RX_PAUSE_FRAMES,
395	STAT_RX_CONTROL_OPCODE_ERRORS,
396	STAT_TX_GOOD_FRAMES,
397	STAT_TX_BROADCAST_FRAMES,
398	STAT_TX_MULTICAST_FRAMES,
399	STAT_TX_UNDERRUN_ERRORS,
400	STAT_TX_CONTROL_FRAMES,
401	STAT_TX_VLAN_FRAMES,
402	STAT_TX_PAUSE_FRAMES,
403	STAT_TX_SINGLE_COLLISION_FRAMES,
404	STAT_TX_MULTIPLE_COLLISION_FRAMES,
405	STAT_TX_DEFERRED_FRAMES,
406	STAT_TX_LATE_COLLISIONS,
407	STAT_TX_EXCESS_COLLISIONS,
408	STAT_TX_EXCESS_DEFERRAL,
409	STAT_RX_ALIGNMENT_ERRORS,
410	STAT_TX_PFC_FRAMES,
411	STAT_RX_PFC_FRAMES,
412	STAT_USER_DEFINED0,
413	STAT_USER_DEFINED1,
414	STAT_USER_DEFINED2,
415	STAT_COUNT,
416};
417
418/**
419 * struct axidma_bd - Axi Dma buffer descriptor layout
420 * @next:         MM2S/S2MM Next Descriptor Pointer
421 * @next_msb:     MM2S/S2MM Next Descriptor Pointer (high 32 bits)
422 * @phys:         MM2S/S2MM Buffer Address
423 * @phys_msb:     MM2S/S2MM Buffer Address (high 32 bits)
424 * @reserved3:    Reserved and not used
425 * @reserved4:    Reserved and not used
426 * @cntrl:        MM2S/S2MM Control value
427 * @status:       MM2S/S2MM Status value
428 * @app0:         MM2S/S2MM User Application Field 0.
429 * @app1:         MM2S/S2MM User Application Field 1.
430 * @app2:         MM2S/S2MM User Application Field 2.
431 * @app3:         MM2S/S2MM User Application Field 3.
432 * @app4:         MM2S/S2MM User Application Field 4.
433 * @skb:          Pointer to SKB transferred using DMA
434 */
435struct axidma_bd {
436	u32 next;	/* Physical address of next buffer descriptor */
437	u32 next_msb;	/* high 32 bits for IP >= v7.1, reserved on older IP */
438	u32 phys;
439	u32 phys_msb;	/* for IP >= v7.1, reserved for older IP */
440	u32 reserved3;
441	u32 reserved4;
442	u32 cntrl;
443	u32 status;
444	u32 app0;
445	u32 app1;	/* TX start << 16 | insert */
446	u32 app2;	/* TX csum seed */
447	u32 app3;
448	u32 app4;   /* Last field used by HW */
449	struct sk_buff *skb;
450} __aligned(XAXIDMA_BD_MINIMUM_ALIGNMENT);
451
452#define XAE_NUM_MISC_CLOCKS 3
453
454/**
455 * struct skbuf_dma_descriptor - skb for each dma descriptor
456 * @sgl: Pointer for sglist.
457 * @desc: Pointer to dma descriptor.
458 * @dma_address: dma address of sglist.
459 * @skb: Pointer to SKB transferred using DMA
460 * @sg_len: number of entries in the sglist.
461 */
462struct skbuf_dma_descriptor {
463	struct scatterlist sgl[MAX_SKB_FRAGS + 1];
464	struct dma_async_tx_descriptor *desc;
465	dma_addr_t dma_address;
466	struct sk_buff *skb;
467	int sg_len;
468};
469
470/**
471 * struct axienet_local - axienet private per device data
472 * @ndev:	Pointer for net_device to which it will be attached.
473 * @dev:	Pointer to device structure
474 * @phylink:	Pointer to phylink instance
475 * @phylink_config: phylink configuration settings
476 * @pcs_phy:	Reference to PCS/PMA PHY if used
477 * @pcs:	phylink pcs structure for PCS PHY
478 * @switch_x_sgmii: Whether switchable 1000BaseX/SGMII mode is enabled in the core
479 * @axi_clk:	AXI4-Lite bus clock
480 * @misc_clks:	Misc ethernet clocks (AXI4-Stream, Ref, MGT clocks)
481 * @mii_bus:	Pointer to MII bus structure
482 * @mii_clk_div: MII bus clock divider value
483 * @regs_start: Resource start for axienet device addresses
484 * @regs:	Base address for the axienet_local device address space
485 * @dma_regs:	Base address for the axidma device address space
486 * @napi_rx:	NAPI RX control structure
487 * @rx_dim:     DIM state for the receive queue
488 * @rx_dim_enabled: Whether DIM is enabled or not
489 * @rx_irqs:    Number of interrupts
490 * @rx_cr_lock: Lock protecting @rx_dma_cr, its register, and @rx_dma_started
491 * @rx_dma_cr:  Nominal content of RX DMA control register
492 * @rx_dma_started: Set when RX DMA is started
493 * @rx_bd_v:	Virtual address of the RX buffer descriptor ring
494 * @rx_bd_p:	Physical address(start address) of the RX buffer descr. ring
495 * @rx_bd_num:	Size of RX buffer descriptor ring
496 * @rx_bd_ci:	Stores the index of the Rx buffer descriptor in the ring being
497 *		accessed currently.
498 * @rx_packets: RX packet count for statistics
499 * @rx_bytes:	RX byte count for statistics
500 * @rx_stat_sync: Synchronization object for RX stats
501 * @napi_tx:	NAPI TX control structure
502 * @tx_cr_lock: Lock protecting @tx_dma_cr, its register, and @tx_dma_started
503 * @tx_dma_cr:  Nominal content of TX DMA control register
504 * @tx_dma_started: Set when TX DMA is started
505 * @tx_bd_v:	Virtual address of the TX buffer descriptor ring
506 * @tx_bd_p:	Physical address(start address) of the TX buffer descr. ring
507 * @tx_bd_num:	Size of TX buffer descriptor ring
508 * @tx_bd_ci:	Stores the next Tx buffer descriptor in the ring that may be
509 *		complete. Only updated at runtime by TX NAPI poll.
510 * @tx_bd_tail:	Stores the index of the next Tx buffer descriptor in the ring
511 *              to be populated.
512 * @tx_packets: TX packet count for statistics
513 * @tx_bytes:	TX byte count for statistics
514 * @tx_stat_sync: Synchronization object for TX stats
515 * @hw_stat_base: Base offset for statistics counters. This may be nonzero if
516 *                the statistics counteres were reset or wrapped around.
517 * @hw_last_counter: Last-seen value of each statistic counter
518 * @reset_in_progress: Set while we are performing a reset and statistics
519 *                     counters may be invalid
520 * @hw_stats_seqcount: Sequence counter for @hw_stat_base, @hw_last_counter,
521 *                     and @reset_in_progress.
522 * @stats_lock: Lock for @hw_stats_seqcount
523 * @stats_work: Work for reading the hardware statistics counters often enough
524 *              to catch overflows.
525 * @dma_err_task: Work structure to process Axi DMA errors
526 * @stopping:   Set when @dma_err_task shouldn't do anything because we are
527 *              about to stop the device.
528 * @tx_irq:	Axidma TX IRQ number
529 * @rx_irq:	Axidma RX IRQ number
530 * @eth_irq:	Ethernet core IRQ number
531 * @phy_mode:	Phy type to identify between MII/GMII/RGMII/SGMII/1000 Base-X
532 * @options:	AxiEthernet option word
533 * @features:	Stores the extended features supported by the axienet hw
534 * @max_frm_size: Stores the maximum size of the frame that can be that
535 *		  Txed/Rxed in the existing hardware. If jumbo option is
536 *		  supported, the maximum frame size would be 9k. Else it is
537 *		  1522 bytes (assuming support for basic VLAN)
538 * @rxmem:	Stores rx memory size for jumbo frame handling.
539 * @use_dmaengine: flag to check dmaengine framework usage.
540 * @tx_chan:	TX DMA channel.
541 * @rx_chan:	RX DMA channel.
542 * @tx_skb_ring: Pointer to TX skb ring buffer array.
543 * @rx_skb_ring: Pointer to RX skb ring buffer array.
544 * @tx_ring_head: TX skb ring buffer head index.
545 * @tx_ring_tail: TX skb ring buffer tail index.
546 * @rx_ring_head: RX skb ring buffer head index.
547 * @rx_ring_tail: RX skb ring buffer tail index.
548 */
549struct axienet_local {
550	struct net_device *ndev;
551	struct device *dev;
552
553	struct phylink *phylink;
554	struct phylink_config phylink_config;
555
556	struct mdio_device *pcs_phy;
557	struct phylink_pcs pcs;
558
559	bool switch_x_sgmii;
560
561	struct clk *axi_clk;
562	struct clk_bulk_data misc_clks[XAE_NUM_MISC_CLOCKS];
563
564	struct mii_bus *mii_bus;
565	u8 mii_clk_div;
566
567	resource_size_t regs_start;
568	void __iomem *regs;
569	void __iomem *dma_regs;
570
571	struct napi_struct napi_rx;
572	struct dim rx_dim;
573	bool rx_dim_enabled;
574	u16 rx_irqs;
575	spinlock_t rx_cr_lock;
576	u32 rx_dma_cr;
577	bool rx_dma_started;
578	struct axidma_bd *rx_bd_v;
579	dma_addr_t rx_bd_p;
580	u32 rx_bd_num;
581	u32 rx_bd_ci;
582	u64_stats_t rx_packets;
583	u64_stats_t rx_bytes;
584	struct u64_stats_sync rx_stat_sync;
585
586	struct napi_struct napi_tx;
587	spinlock_t tx_cr_lock;
588	u32 tx_dma_cr;
589	bool tx_dma_started;
590	struct axidma_bd *tx_bd_v;
591	dma_addr_t tx_bd_p;
592	u32 tx_bd_num;
593	u32 tx_bd_ci;
594	u32 tx_bd_tail;
595	u64_stats_t tx_packets;
596	u64_stats_t tx_bytes;
597	struct u64_stats_sync tx_stat_sync;
598
599	u64 hw_stat_base[STAT_COUNT];
600	u32 hw_last_counter[STAT_COUNT];
601	seqcount_mutex_t hw_stats_seqcount;
602	struct mutex stats_lock;
603	struct delayed_work stats_work;
604	bool reset_in_progress;
605
606	struct work_struct dma_err_task;
607	bool stopping;
608
609	int tx_irq;
610	int rx_irq;
611	int eth_irq;
612	phy_interface_t phy_mode;
613
614	u32 options;
615	u32 features;
616
617	u32 max_frm_size;
618	u32 rxmem;
619
620	u8  use_dmaengine;
621	struct dma_chan *tx_chan;
622	struct dma_chan *rx_chan;
623	struct skbuf_dma_descriptor **tx_skb_ring;
624	struct skbuf_dma_descriptor **rx_skb_ring;
625	int tx_ring_head;
626	int tx_ring_tail;
627	int rx_ring_head;
628	int rx_ring_tail;
629};
630
631/**
632 * struct axienet_option - Used to set axi ethernet hardware options
633 * @opt:	Option to be set.
634 * @reg:	Register offset to be written for setting the option
635 * @m_or:	Mask to be ORed for setting the option in the register
636 */
637struct axienet_option {
638	u32 opt;
639	u32 reg;
640	u32 m_or;
641};
642
643/**
644 * axienet_ior - Memory mapped Axi Ethernet register read
645 * @lp:         Pointer to axienet local structure
646 * @offset:     Address offset from the base address of Axi Ethernet core
647 *
648 * Return: The contents of the Axi Ethernet register
649 *
650 * This function returns the contents of the corresponding register.
651 */
652static inline u32 axienet_ior(struct axienet_local *lp, off_t offset)
653{
654	return ioread32(lp->regs + offset);
655}
656
657static inline u32 axinet_ior_read_mcr(struct axienet_local *lp)
658{
659	return axienet_ior(lp, XAE_MDIO_MCR_OFFSET);
660}
661
662static inline void axienet_lock_mii(struct axienet_local *lp)
663{
664	if (lp->mii_bus)
665		mutex_lock(&lp->mii_bus->mdio_lock);
666}
667
668static inline void axienet_unlock_mii(struct axienet_local *lp)
669{
670	if (lp->mii_bus)
671		mutex_unlock(&lp->mii_bus->mdio_lock);
672}
673
674/**
675 * axienet_iow - Memory mapped Axi Ethernet register write
676 * @lp:         Pointer to axienet local structure
677 * @offset:     Address offset from the base address of Axi Ethernet core
678 * @value:      Value to be written into the Axi Ethernet register
679 *
680 * This function writes the desired value into the corresponding Axi Ethernet
681 * register.
682 */
683static inline void axienet_iow(struct axienet_local *lp, off_t offset,
684			       u32 value)
685{
686	iowrite32(value, lp->regs + offset);
687}
688
689/**
690 * axienet_dma_out32 - Memory mapped Axi DMA register write.
691 * @lp:		Pointer to axienet local structure
692 * @reg:	Address offset from the base address of the Axi DMA core
693 * @value:	Value to be written into the Axi DMA register
694 *
695 * This function writes the desired value into the corresponding Axi DMA
696 * register.
697 */
698
699static inline void axienet_dma_out32(struct axienet_local *lp,
700				     off_t reg, u32 value)
701{
702	iowrite32(value, lp->dma_regs + reg);
703}
704
705#if defined(CONFIG_64BIT) && defined(iowrite64)
706/**
707 * axienet_dma_out64 - Memory mapped Axi DMA register write.
708 * @lp:		Pointer to axienet local structure
709 * @reg:	Address offset from the base address of the Axi DMA core
710 * @value:	Value to be written into the Axi DMA register
711 *
712 * This function writes the desired value into the corresponding Axi DMA
713 * register.
714 */
715static inline void axienet_dma_out64(struct axienet_local *lp,
716				     off_t reg, u64 value)
717{
718	iowrite64(value, lp->dma_regs + reg);
719}
720
721static inline void axienet_dma_out_addr(struct axienet_local *lp, off_t reg,
722					dma_addr_t addr)
723{
724	if (lp->features & XAE_FEATURE_DMA_64BIT)
725		axienet_dma_out64(lp, reg, addr);
726	else
727		axienet_dma_out32(lp, reg, lower_32_bits(addr));
728}
729
730#else /* CONFIG_64BIT */
731
732static inline void axienet_dma_out_addr(struct axienet_local *lp, off_t reg,
733					dma_addr_t addr)
734{
735	axienet_dma_out32(lp, reg, lower_32_bits(addr));
736}
737
738#endif /* CONFIG_64BIT */
739
740/* Function prototypes visible in xilinx_axienet_mdio.c for other files */
741int axienet_mdio_setup(struct axienet_local *lp);
742void axienet_mdio_teardown(struct axienet_local *lp);
743
744#endif /* XILINX_AXI_ENET_H */
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