net: ethernet: slicoss: add slicoss gigabit ethernet driver

Add driver for Alacritech gigabit ethernet cards with SLIC (session-layer
interface control) technology. The driver provides basic support without
SLIC for the following devices:

- Mojave cards (single port PCI Gigabit) both copper and fiber
- Oasis cards (single and dual port PCI-x Gigabit) copper and fiber
- Kalahari cards (dual and quad port PCI-e Gigabit) copper and fiber

Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 2489 insertions, 0 deletions

diff --git a/drivers/net/ethernet/alacritech/Kconfig b/drivers/net/ethernet/alacritech/Kconfig
new file mode 100644
index 000000000000..09496e18cdc5
--- /dev/null
+++ b/drivers/net/ethernet/alacritech/Kconfig
@@ -0,0 +1,28 @@
+config NET_VENDOR_ALACRITECH
+	bool "Alacritech devices"
+	default y
+	---help---
+	  If you have a network (Ethernet) card belonging to this class, say Y.
+
+	  Note that the answer to this question doesn't directly affect the
+	  kernel: saying N will just cause the configurator to skip all the
+	  questions about Alacritech devices. If you say Y, you will be asked
+	  for your specific device in the following questions.
+
+if NET_VENDOR_ALACRITECH
+
+config SLICOSS
+	tristate "Alacritech Slicoss support"
+	depends on PCI
+	select CRC32
+	---help---
+	  This driver supports Gigabit Ethernet adapters based on the
+	  Session Layer Interface (SLIC) technology by Alacritech.
+
+	  Supported are Mojave (1 port) and Oasis (1, 2 and 4 port) cards,
+	  both copper and fiber.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called slicoss. This is recommended.
+
+endif # NET_VENDOR_ALACRITECH
diff --git a/drivers/net/ethernet/alacritech/Makefile b/drivers/net/ethernet/alacritech/Makefile
new file mode 100644
index 000000000000..8790e9ed8496
--- /dev/null
+++ b/drivers/net/ethernet/alacritech/Makefile
@@ -0,0 +1,4 @@
+#
+# Makefile for the Alacritech Slicoss driver
+#
+obj-$(CONFIG_SLICOSS) += slicoss.o
diff --git a/drivers/net/ethernet/alacritech/slic.h b/drivers/net/ethernet/alacritech/slic.h
new file mode 100644
index 000000000000..08931b4afc96
--- /dev/null
+++ b/drivers/net/ethernet/alacritech/slic.h
@@ -0,0 +1,575 @@
+
+#ifndef _SLIC_H
+#define _SLIC_H
+
+#include <linux/types.h>
+#include <linux/netdevice.h>
+#include <linux/spinlock_types.h>
+#include <linux/dma-mapping.h>
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+#include <linux/list.h>
+#include <linux/u64_stats_sync.h>
+
+#define SLIC_VGBSTAT_XPERR		0x40000000
+#define SLIC_VGBSTAT_XERRSHFT		25
+#define SLIC_VGBSTAT_XCSERR		0x23
+#define SLIC_VGBSTAT_XUFLOW		0x22
+#define SLIC_VGBSTAT_XHLEN		0x20
+#define SLIC_VGBSTAT_NETERR		0x01000000
+#define SLIC_VGBSTAT_NERRSHFT		16
+#define SLIC_VGBSTAT_NERRMSK		0x1ff
+#define SLIC_VGBSTAT_NCSERR		0x103
+#define SLIC_VGBSTAT_NUFLOW		0x102
+#define SLIC_VGBSTAT_NHLEN		0x100
+#define SLIC_VGBSTAT_LNKERR		0x00000080
+#define SLIC_VGBSTAT_LERRMSK		0xff
+#define SLIC_VGBSTAT_LDEARLY		0x86
+#define SLIC_VGBSTAT_LBOFLO		0x85
+#define SLIC_VGBSTAT_LCODERR		0x84
+#define SLIC_VGBSTAT_LDBLNBL		0x83
+#define SLIC_VGBSTAT_LCRCERR		0x82
+#define SLIC_VGBSTAT_LOFLO		0x81
+#define SLIC_VGBSTAT_LUFLO		0x80
+
+#define SLIC_IRHDDR_FLEN_MSK		0x0000ffff
+#define SLIC_IRHDDR_SVALID		0x80000000
+#define SLIC_IRHDDR_ERR			0x10000000
+
+#define SLIC_VRHSTAT_802OE		0x80000000
+#define SLIC_VRHSTAT_TPOFLO		0x10000000
+#define SLIC_VRHSTATB_802UE		0x80000000
+#define SLIC_VRHSTATB_RCVE		0x40000000
+#define SLIC_VRHSTATB_BUFF		0x20000000
+#define SLIC_VRHSTATB_CARRE		0x08000000
+#define SLIC_VRHSTATB_LONGE		0x02000000
+#define SLIC_VRHSTATB_PREA		0x01000000
+#define SLIC_VRHSTATB_CRC		0x00800000
+#define SLIC_VRHSTATB_DRBL		0x00400000
+#define SLIC_VRHSTATB_CODE		0x00200000
+#define SLIC_VRHSTATB_TPCSUM		0x00100000
+#define SLIC_VRHSTATB_TPHLEN		0x00080000
+#define SLIC_VRHSTATB_IPCSUM		0x00040000
+#define SLIC_VRHSTATB_IPLERR		0x00020000
+#define SLIC_VRHSTATB_IPHERR		0x00010000
+
+#define SLIC_CMD_XMT_REQ		0x01
+#define SLIC_CMD_TYPE_DUMB		3
+
+#define SLIC_RESET_MAGIC		0xDEAD
+#define SLIC_ICR_INT_OFF		0
+#define SLIC_ICR_INT_ON			1
+#define SLIC_ICR_INT_MASK		2
+
+#define SLIC_ISR_ERR			0x80000000
+#define SLIC_ISR_RCV			0x40000000
+#define SLIC_ISR_CMD			0x20000000
+#define SLIC_ISR_IO			0x60000000
+#define SLIC_ISR_UPC			0x10000000
+#define SLIC_ISR_LEVENT			0x08000000
+#define SLIC_ISR_RMISS			0x02000000
+#define SLIC_ISR_UPCERR			0x01000000
+#define SLIC_ISR_XDROP			0x00800000
+#define SLIC_ISR_UPCBSY			0x00020000
+
+#define SLIC_ISR_PING_MASK		0x00700000
+#define SLIC_ISR_UPCERR_MASK		(SLIC_ISR_UPCERR | SLIC_ISR_UPCBSY)
+#define SLIC_ISR_UPC_MASK		(SLIC_ISR_UPC | SLIC_ISR_UPCERR_MASK)
+#define SLIC_WCS_START			0x80000000
+#define SLIC_WCS_COMPARE		0x40000000
+#define SLIC_RCVWCS_BEGIN		0x40000000
+#define SLIC_RCVWCS_FINISH		0x80000000
+
+#define SLIC_MIICR_REG_16		0x00100000
+#define SLIC_MRV_REG16_XOVERON		0x0068
+
+#define SLIC_GIG_LINKUP			0x0001
+#define SLIC_GIG_FULLDUPLEX		0x0002
+#define SLIC_GIG_SPEED_MASK		0x000C
+#define SLIC_GIG_SPEED_1000		0x0008
+#define SLIC_GIG_SPEED_100		0x0004
+#define SLIC_GIG_SPEED_10		0x0000
+
+#define SLIC_GMCR_RESET			0x80000000
+#define SLIC_GMCR_GBIT			0x20000000
+#define SLIC_GMCR_FULLD			0x10000000
+#define SLIC_GMCR_GAPBB_SHIFT		14
+#define SLIC_GMCR_GAPR1_SHIFT		7
+#define SLIC_GMCR_GAPR2_SHIFT		0
+#define SLIC_GMCR_GAPBB_1000		0x60
+#define SLIC_GMCR_GAPR1_1000		0x2C
+#define SLIC_GMCR_GAPR2_1000		0x40
+#define SLIC_GMCR_GAPBB_100		0x70
+#define SLIC_GMCR_GAPR1_100		0x2C
+#define SLIC_GMCR_GAPR2_100		0x40
+
+#define SLIC_XCR_RESET			0x80000000
+#define SLIC_XCR_XMTEN			0x40000000
+#define SLIC_XCR_PAUSEEN		0x20000000
+#define SLIC_XCR_LOADRNG		0x10000000
+
+#define SLIC_GXCR_RESET			0x80000000
+#define SLIC_GXCR_XMTEN			0x40000000
+#define SLIC_GXCR_PAUSEEN		0x20000000
+
+#define SLIC_GRCR_RESET			0x80000000
+#define SLIC_GRCR_RCVEN			0x40000000
+#define SLIC_GRCR_RCVALL		0x20000000
+#define SLIC_GRCR_RCVBAD		0x10000000
+#define SLIC_GRCR_CTLEN			0x08000000
+#define SLIC_GRCR_ADDRAEN		0x02000000
+#define SLIC_GRCR_HASHSIZE_SHIFT	17
+#define SLIC_GRCR_HASHSIZE		14
+
+/* Reset Register */
+#define SLIC_REG_RESET			0x0000
+/* Interrupt Control Register */
+#define SLIC_REG_ICR			0x0008
+/* Interrupt status pointer */
+#define SLIC_REG_ISP			0x0010
+/* Interrupt status */
+#define SLIC_REG_ISR			0x0018
+/* Header buffer address reg
+ * 31-8 - phy addr of set of contiguous hdr buffers
+ *  7-0 - number of buffers passed
+ * Buffers are 256 bytes long on 256-byte boundaries.
+ */
+#define SLIC_REG_HBAR			0x0020
+/* Data buffer handle & address reg
+ * 4 sets of registers; Buffers are 2K bytes long 2 per 4K page.
+ */
+#define SLIC_REG_DBAR			0x0028
+/* Xmt Cmd buf addr regs.
+ * 1 per XMT interface
+ * 31-5 - phy addr of host command buffer
+ *  4-0 - length of cmd in multiples of 32 bytes
+ * Buffers are 32 bytes up to 512 bytes long
+ */
+#define SLIC_REG_CBAR			0x0030
+/* Write control store */
+#define	SLIC_REG_WCS			0x0034
+/*Response buffer address reg.
+ * 31-8 - phy addr of set of contiguous response buffers
+ * 7-0 - number of buffers passed
+ * Buffers are 32 bytes long on 32-byte boundaries.
+ */
+#define	SLIC_REG_RBAR			0x0038
+/* Read statistics (UPR) */
+#define	SLIC_REG_RSTAT			0x0040
+/* Read link status */
+#define	SLIC_REG_LSTAT			0x0048
+/* Write Mac Config */
+#define	SLIC_REG_WMCFG			0x0050
+/* Write phy register */
+#define SLIC_REG_WPHY			0x0058
+/* Rcv Cmd buf addr reg */
+#define	SLIC_REG_RCBAR			0x0060
+/* Read SLIC Config*/
+#define SLIC_REG_RCONFIG		0x0068
+/* Interrupt aggregation time */
+#define SLIC_REG_INTAGG			0x0070
+/* Write XMIT config reg */
+#define	SLIC_REG_WXCFG			0x0078
+/* Write RCV config reg */
+#define	SLIC_REG_WRCFG			0x0080
+/* Write rcv addr a low */
+#define	SLIC_REG_WRADDRAL		0x0088
+/* Write rcv addr a high */
+#define	SLIC_REG_WRADDRAH		0x0090
+/* Write rcv addr b low */
+#define	SLIC_REG_WRADDRBL		0x0098
+/* Write rcv addr b high */
+#define	SLIC_REG_WRADDRBH		0x00a0
+/* Low bits of mcast mask */
+#define	SLIC_REG_MCASTLOW		0x00a8
+/* High bits of mcast mask */
+#define	SLIC_REG_MCASTHIGH		0x00b0
+/* Ping the card */
+#define SLIC_REG_PING			0x00b8
+/* Dump command */
+#define SLIC_REG_DUMP_CMD		0x00c0
+/* Dump data pointer */
+#define SLIC_REG_DUMP_DATA		0x00c8
+/* Read card's pci_status register */
+#define	SLIC_REG_PCISTATUS		0x00d0
+/* Write hostid field */
+#define SLIC_REG_WRHOSTID		0x00d8
+/* Put card in a low power state */
+#define SLIC_REG_LOW_POWER		0x00e0
+/* Force slic into quiescent state  before soft reset */
+#define SLIC_REG_QUIESCE		0x00e8
+/* Reset interface queues */
+#define SLIC_REG_RESET_IFACE		0x00f0
+/* Register is only written when it has changed.
+ * Bits 63-32 for host i/f addrs.
+ */
+#define SLIC_REG_ADDR_UPPER		0x00f8
+/* 64 bit Header buffer address reg */
+#define SLIC_REG_HBAR64			0x0100
+/* 64 bit Data buffer handle & address reg */
+#define SLIC_REG_DBAR64			0x0108
+/* 64 bit Xmt Cmd buf addr regs. */
+#define SLIC_REG_CBAR64			0x0110
+/* 64 bit Response buffer address reg.*/
+#define SLIC_REG_RBAR64			0x0118
+/* 64 bit Rcv Cmd buf addr reg*/
+#define	SLIC_REG_RCBAR64		0x0120
+/* Read statistics (64 bit UPR) */
+#define	SLIC_REG_RSTAT64		0x0128
+/* Download Gigabit RCV sequencer ucode */
+#define SLIC_REG_RCV_WCS		0x0130
+/* Write VlanId field */
+#define SLIC_REG_WRVLANID		0x0138
+/* Read Transformer info */
+#define SLIC_REG_READ_XF_INFO		0x0140
+/* Write Transformer info */
+#define SLIC_REG_WRITE_XF_INFO		0x0148
+/* Write card ticks per second */
+#define SLIC_REG_TICKS_PER_SEC		0x0170
+#define SLIC_REG_HOSTID			0x1554
+
+#define PCI_VENDOR_ID_ALACRITECH		0x139A
+#define PCI_DEVICE_ID_ALACRITECH_MOJAVE		0x0005
+#define PCI_SUBDEVICE_ID_ALACRITECH_1000X1	0x0005
+#define PCI_SUBDEVICE_ID_ALACRITECH_1000X1_2	0x0006
+#define PCI_SUBDEVICE_ID_ALACRITECH_1000X1F	0x0007
+#define PCI_SUBDEVICE_ID_ALACRITECH_CICADA	0x0008
+#define PCI_SUBDEVICE_ID_ALACRITECH_SES1001T	0x2006
+#define PCI_SUBDEVICE_ID_ALACRITECH_SES1001F	0x2007
+#define PCI_DEVICE_ID_ALACRITECH_OASIS		0x0007
+#define PCI_SUBDEVICE_ID_ALACRITECH_SEN2002XT	0x000B
+#define PCI_SUBDEVICE_ID_ALACRITECH_SEN2002XF	0x000C
+#define PCI_SUBDEVICE_ID_ALACRITECH_SEN2001XT	0x000D
+#define PCI_SUBDEVICE_ID_ALACRITECH_SEN2001XF	0x000E
+#define PCI_SUBDEVICE_ID_ALACRITECH_SEN2104EF	0x000F
+#define PCI_SUBDEVICE_ID_ALACRITECH_SEN2104ET	0x0010
+#define PCI_SUBDEVICE_ID_ALACRITECH_SEN2102EF	0x0011
+#define PCI_SUBDEVICE_ID_ALACRITECH_SEN2102ET	0x0012
+
+/* Note: power of two required for number descriptors  */
+#define SLIC_NUM_RX_LES			256
+#define SLIC_RX_BUFF_SIZE		2048
+#define SLIC_RX_BUFF_ALIGN		256
+#define SLIC_RX_BUFF_HDR_SIZE		34
+#define SLIC_MAX_REQ_RX_DESCS		1
+
+#define SLIC_NUM_TX_DESCS		256
+#define SLIC_TX_DESC_ALIGN		32
+#define SLIC_MIN_TX_WAKEUP_DESCS	10
+#define SLIC_MAX_REQ_TX_DESCS		1
+#define SLIC_MAX_TX_COMPLETIONS		100
+
+#define SLIC_NUM_STAT_DESCS		128
+#define SLIC_STATS_DESC_ALIGN		256
+
+#define SLIC_NUM_STAT_DESC_ARRAYS	4
+#define SLIC_INVALID_STAT_DESC_IDX	0xffffffff
+
+#define SLIC_NAPI_WEIGHT		64
+
+#define SLIC_UPR_LSTAT			0
+#define SLIC_UPR_CONFIG			1
+
+#define SLIC_EEPROM_SIZE		128
+#define SLIC_EEPROM_MAGIC		0xa5a5
+
+#define SLIC_FIRMWARE_MOJAVE		"slicoss/gbdownload.sys"
+#define SLIC_FIRMWARE_OASIS		"slicoss/oasisdownload.sys"
+#define SLIC_RCV_FIRMWARE_MOJAVE	"slicoss/gbrcvucode.sys"
+#define SLIC_RCV_FIRMWARE_OASIS		"slicoss/oasisrcvucode.sys"
+#define SLIC_FIRMWARE_MIN_SIZE		64
+#define SLIC_FIRMWARE_MAX_SECTIONS	3
+
+#define SLIC_MODEL_MOJAVE		0
+#define SLIC_MODEL_OASIS		1
+
+#define SLIC_INC_STATS_COUNTER(st, counter)	\
+do {						\
+	u64_stats_update_begin(&(st)->syncp);	\
+	(st)->counter++;			\
+	u64_stats_update_end(&(st)->syncp);	\
+} while (0)
+
+#define SLIC_GET_STATS_COUNTER(newst, st, counter)			\
+{									\
+	unsigned int start;						\
+	do {							\
+		start = u64_stats_fetch_begin_irq(&(st)->syncp);	\
+		newst = (st)->counter;					\
+	} while (u64_stats_fetch_retry_irq(&(st)->syncp, start));	\
+}
+
+struct slic_upr {
+	dma_addr_t paddr;
+	unsigned int type;
+	struct list_head list;
+};
+
+struct slic_upr_list {
+	bool pending;
+	struct list_head list;
+	/* upr list lock */
+	spinlock_t lock;
+};
+
+/* SLIC EEPROM structure for Mojave */
+struct slic_mojave_eeprom {
+	__le16 id;		/* 00 EEPROM/FLASH Magic code 'A5A5'*/
+	__le16 eeprom_code_size;/* 01 Size of EEPROM Codes (bytes * 4)*/
+	__le16 flash_size;	/* 02 Flash size */
+	__le16 eeprom_size;	/* 03 EEPROM Size */
+	__le16 vendor_id;	/* 04 Vendor ID */
+	__le16 dev_id;		/* 05 Device ID */
+	u8 rev_id;		/* 06 Revision ID */
+	u8 class_code[3];	/* 07 Class Code */
+	u8 irqpin_dbg;		/* 08 Debug Interrupt pin */
+	u8 irqpin;		/*    Network Interrupt Pin */
+	u8 min_grant;		/* 09 Minimum grant */
+	u8 max_lat;		/*    Maximum Latency */
+	__le16 pci_stat;	/* 10 PCI Status */
+	__le16 sub_vendor_id;	/* 11 Subsystem Vendor Id */
+	__le16 sub_id;		/* 12 Subsystem ID */
+	__le16 dev_id_dbg;	/* 13 Debug Device Id */
+	__le16 ramrom;		/* 14 Dram/Rom function */
+	__le16 dram_size2pci;	/* 15 DRAM size to PCI (bytes * 64K) */
+	__le16 rom_size2pci;	/* 16 ROM extension size to PCI (bytes * 4k) */
+	u8 pad[2];		/* 17 Padding */
+	u8 freetime;		/* 18 FreeTime setting */
+	u8 ifctrl;		/* 10-bit interface control (Mojave only) */
+	__le16 dram_size;	/* 19 DRAM size (bytes * 64k) */
+	u8 mac[ETH_ALEN];	/* 20 MAC addresses */
+	u8 mac2[ETH_ALEN];
+	u8 pad2[6];
+	u16 dev_id2;		/* Device ID for 2nd PCI function */
+	u8 irqpin2;		/* Interrupt pin for 2nd PCI function */
+	u8 class_code2[3];	/* Class Code for 2nd PCI function */
+	u16 cfg_byte6;		/* Config Byte 6 */
+	u16 pme_cap;		/* Power Mgment capabilities */
+	u16 nwclk_ctrl;		/* NetworkClockControls */
+	u8 fru_format;		/* Alacritech FRU format type */
+	u8 fru_assembly[6];	/* Alacritech FRU information */
+	u8 fru_rev[2];
+	u8 fru_serial[14];
+	u8 fru_pad[3];
+	u8 oem_fru[28];		/* optional OEM FRU format type */
+	u8 pad3[4];		/* Pad to 128 bytes - includes 2 cksum bytes
+				 * (if OEM FRU info exists) and two unusable
+				 * bytes at the end
+				 */
+};
+
+/* SLIC EEPROM structure for Oasis */
+struct slic_oasis_eeprom {
+	__le16 id;		/* 00 EEPROM/FLASH Magic code 'A5A5' */
+	__le16 eeprom_code_size;/* 01 Size of EEPROM Codes (bytes * 4)*/
+	__le16 spidev0_cfg;	/* 02 Flash Config for SPI device 0 */
+	__le16 spidev1_cfg;	/* 03 Flash Config for SPI device 1 */
+	__le16 vendor_id;	/* 04 Vendor ID */
+	__le16 dev_id;		/* 05 Device ID (function 0) */
+	u8 rev_id;		/* 06 Revision ID */
+	u8 class_code0[3];	/* 07 Class Code for PCI function 0 */
+	u8 irqpin1;		/* 08 Interrupt pin for PCI function 1*/
+	u8 class_code1[3];	/* 09 Class Code for PCI function 1 */
+	u8 irqpin2;		/* 10 Interrupt pin for PCI function 2*/
+	u8 irqpin0;		/*    Interrupt pin for PCI function 0*/
+	u8 min_grant;		/* 11 Minimum grant */
+	u8 max_lat;		/*    Maximum Latency */
+	__le16 sub_vendor_id;	/* 12 Subsystem Vendor Id */
+	__le16 sub_id;		/* 13 Subsystem ID */
+	__le16 flash_size;	/* 14 Flash size (bytes / 4K) */
+	__le16 dram_size2pci;	/* 15 DRAM size to PCI (bytes / 64K) */
+	__le16 rom_size2pci;	/* 16 Flash (ROM extension) size to PCI
+				 *   (bytes / 4K)
+				 */
+	__le16 dev_id1;		/* 17 Device Id (function 1) */
+	__le16 dev_id2;		/* 18 Device Id (function 2) */
+	__le16 dev_stat_cfg;	/* 19 Device Status Config Bytes 6-7 */
+	__le16 pme_cap;		/* 20 Power Mgment capabilities */
+	u8 msi_cap;		/* 21 MSI capabilities */
+	u8 clock_div;		/*    Clock divider */
+	__le16 pci_stat_lo;	/* 22 PCI Status bits 15:0 */
+	__le16 pci_stat_hi;	/* 23 PCI Status bits 31:16 */
+	__le16 dram_cfg_lo;	/* 24 DRAM Configuration bits 15:0 */
+	__le16 dram_cfg_hi;	/* 25 DRAM Configuration bits 31:16 */
+	__le16 dram_size;	/* 26 DRAM size (bytes / 64K) */
+	__le16 gpio_tbi_ctrl;	/* 27 GPIO/TBI controls for functions 1/0 */
+	__le16 eeprom_size;	/* 28 EEPROM Size */
+	u8 mac[ETH_ALEN];	/* 29 MAC addresses (2 ports) */
+	u8 mac2[ETH_ALEN];
+	u8 fru_format;		/* 35 Alacritech FRU format type */
+	u8 fru_assembly[6];	/* Alacritech FRU information */
+	u8 fru_rev[2];
+	u8 fru_serial[14];
+	u8 fru_pad[3];
+	u8 oem_fru[28];		/* optional OEM FRU information */
+	u8 pad[4];		/* Pad to 128 bytes - includes 2 checksum bytes
+				 * (if OEM FRU info exists) and two unusable
+				 * bytes at the end
+				 */
+};
+
+struct slic_stats {
+	u64 rx_packets;
+	u64 rx_bytes;
+	u64 rx_mcasts;
+	u64 rx_errors;
+	u64 tx_packets;
+	u64 tx_bytes;
+	/* HW STATS */
+	u64 rx_buff_miss;
+	u64 tx_dropped;
+	u64 irq_errs;
+	/* transport layer */
+	u64 rx_tpcsum;
+	u64 rx_tpoflow;
+	u64 rx_tphlen;
+	/* ip layer */
+	u64 rx_ipcsum;
+	u64 rx_iplen;
+	u64 rx_iphlen;
+	/* link layer */
+	u64 rx_early;
+	u64 rx_buffoflow;
+	u64 rx_lcode;
+	u64 rx_drbl;
+	u64 rx_crc;
+	u64 rx_oflow802;
+	u64 rx_uflow802;
+	/* oasis only */
+	u64 tx_carrier;
+	struct u64_stats_sync syncp;
+};
+
+struct slic_shmem_data {
+	__le32 isr;
+	__le32 link;
+};
+
+struct slic_shmem {
+	dma_addr_t isr_paddr;
+	dma_addr_t link_paddr;
+	struct slic_shmem_data *shmem_data;
+};
+
+struct slic_rx_info_oasis {
+	__le32 frame_status;
+	__le32 frame_status_b;
+	__le32 time_stamp;
+	__le32 checksum;
+};
+
+struct slic_rx_info_mojave {
+	__le32 frame_status;
+	__le16 byte_cnt;
+	__le16 tp_chksum;
+	__le16 ctx_hash;
+	__le16 mac_hash;
+	__le16 buff_lnk;
+};
+
+struct slic_stat_desc {
+	__le32 hnd;
+	__u8 pad[8];
+	__le32 status;
+	__u8 pad2[16];
+};
+
+struct slic_stat_queue {
+	struct slic_stat_desc *descs[SLIC_NUM_STAT_DESC_ARRAYS];
+	dma_addr_t paddr[SLIC_NUM_STAT_DESC_ARRAYS];
+	unsigned int addr_offset[SLIC_NUM_STAT_DESC_ARRAYS];
+	unsigned int active_array;
+	unsigned int len;
+	unsigned int done_idx;
+	size_t mem_size;
+};
+
+struct slic_tx_desc {
+	__le32 hnd;
+	__le32 rsvd;
+	u8 cmd;
+	u8 flags;
+	__le16 rsvd2;
+	__le32 totlen;
+	__le32 paddrl;
+	__le32 paddrh;
+	__le32 len;
+	__le32 type;
+};
+
+struct slic_tx_buffer {
+	struct sk_buff *skb;
+	DEFINE_DMA_UNMAP_ADDR(map_addr);
+	DEFINE_DMA_UNMAP_LEN(map_len);
+	struct slic_tx_desc *desc;
+	dma_addr_t desc_paddr;
+};
+
+struct slic_tx_queue {
+	struct dma_pool *dma_pool;
+	struct slic_tx_buffer *txbuffs;
+	unsigned int len;
+	unsigned int put_idx;
+	unsigned int done_idx;
+};
+
+struct slic_rx_desc {
+	u8 pad[16];
+	__le32 buffer;
+	__le32 length;
+	__le32 status;
+};
+
+struct slic_rx_buffer {
+	struct sk_buff *skb;
+	DEFINE_DMA_UNMAP_ADDR(map_addr);
+	DEFINE_DMA_UNMAP_LEN(map_len);
+	unsigned int addr_offset;
+};
+
+struct slic_rx_queue {
+	struct slic_rx_buffer *rxbuffs;
+	unsigned int len;
+	unsigned int done_idx;
+	unsigned int put_idx;
+};
+
+struct slic_device {
+	struct pci_dev *pdev;
+	struct net_device *netdev;
+	void __iomem *regs;
+	/* upper address setting lock */
+	spinlock_t upper_lock;
+	struct slic_shmem shmem;
+	struct napi_struct napi;
+	struct slic_rx_queue rxq;
+	struct slic_tx_queue txq;
+	struct slic_stat_queue stq;
+	struct slic_stats stats;
+	struct slic_upr_list upr_list;
+	/* link configuration lock */
+	spinlock_t link_lock;
+	bool promisc;
+	int speed;
+	unsigned int duplex;
+	bool is_fiber;
+	unsigned char model;
+};
+
+static inline u32 slic_read(struct slic_device *sdev, unsigned int reg)
+{
+	return ioread32(sdev->regs + reg);
+}
+
+static inline void slic_write(struct slic_device *sdev, unsigned int reg,
+			      u32 val)
+{
+	iowrite32(val, sdev->regs + reg);
+}
+
+static inline void slic_flush_write(struct slic_device *sdev)
+{
+	(void)ioread32(sdev->regs + SLIC_REG_HOSTID);
+}
+
+#endif /* _SLIC_H */
diff --git a/drivers/net/ethernet/alacritech/slicoss.c b/drivers/net/ethernet/alacritech/slicoss.c
new file mode 100644
index 000000000000..e77ecd5b307c
--- /dev/null
+++ b/drivers/net/ethernet/alacritech/slicoss.c
@@ -0,0 +1,1882 @@
+/*
+ * Driver for Gigabit Ethernet adapters based on the Session Layer
+ * Interface (SLIC) technology by Alacritech. The driver does not
+ * support the hardware acceleration features provided by these cards.
+ *
+ * Copyright (C) 2016 Lino Sanfilippo <LinoSanfilippo@gmx.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/if_ether.h>
+#include <linux/crc32.h>
+#include <linux/dma-mapping.h>
+#include <linux/ethtool.h>
+#include <linux/mii.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/list.h>
+#include <linux/u64_stats_sync.h>
+
+#include "slic.h"
+
+#define DRV_NAME			"slicoss"
+#define DRV_VERSION			"1.0"
+
+static const struct pci_device_id slic_id_tbl[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_ALACRITECH,
+		     PCI_DEVICE_ID_ALACRITECH_MOJAVE) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_ALACRITECH,
+		     PCI_DEVICE_ID_ALACRITECH_OASIS) },
+	{ 0 }
+};
+
+static const char slic_stats_strings[][ETH_GSTRING_LEN] = {
+	"rx_packets",
+	"rx_bytes",
+	"rx_multicasts",
+	"rx_errors",
+	"rx_buff_miss",
+	"rx_tp_csum",
+	"rx_tp_oflow",
+	"rx_tp_hlen",
+	"rx_ip_csum",
+	"rx_ip_len",
+	"rx_ip_hdr_len",
+	"rx_early",
+	"rx_buff_oflow",
+	"rx_lcode",
+	"rx_drbl",
+	"rx_crc",
+	"rx_oflow_802",
+	"rx_uflow_802",
+	"tx_packets",
+	"tx_bytes",
+	"tx_carrier",
+	"tx_dropped",
+	"irq_errs",
+};
+
+static inline int slic_next_queue_idx(unsigned int idx, unsigned int qlen)
+{
+	return (idx + 1) & (qlen - 1);
+}
+
+static inline int slic_get_free_queue_descs(unsigned int put_idx,
+					    unsigned int done_idx,
+					    unsigned int qlen)
+{
+	if (put_idx >= done_idx)
+		return (qlen - (put_idx - done_idx) - 1);
+	return (done_idx - put_idx - 1);
+}
+
+static unsigned int slic_next_compl_idx(struct slic_device *sdev)
+{
+	struct slic_stat_queue *stq = &sdev->stq;
+	unsigned int active = stq->active_array;
+	struct slic_stat_desc *descs;
+	struct slic_stat_desc *stat;
+	unsigned int idx;
+
+	descs = stq->descs[active];
+	stat = &descs[stq->done_idx];
+
+	if (!stat->status)
+		return SLIC_INVALID_STAT_DESC_IDX;
+
+	idx = (le32_to_cpu(stat->hnd) & 0xffff) - 1;
+	/* reset desc */
+	stat->hnd = 0;
+	stat->status = 0;
+
+	stq->done_idx = slic_next_queue_idx(stq->done_idx, stq->len);
+	/* check for wraparound */
+	if (!stq->done_idx) {
+		dma_addr_t paddr = stq->paddr[active];
+
+		slic_write(sdev, SLIC_REG_RBAR, lower_32_bits(paddr) |
+						stq->len);
+		/* make sure new status descriptors are immediately available */
+		slic_flush_write(sdev);
+		active++;
+		active &= (SLIC_NUM_STAT_DESC_ARRAYS - 1);
+		stq->active_array = active;
+	}
+	return idx;
+}
+
+static unsigned int slic_get_free_tx_descs(struct slic_tx_queue *txq)
+{
+	/* ensure tail idx is updated */
+	smp_mb();
+	return slic_get_free_queue_descs(txq->put_idx, txq->done_idx, txq->len);
+}
+
+static unsigned int slic_get_free_rx_descs(struct slic_rx_queue *rxq)
+{
+	return slic_get_free_queue_descs(rxq->put_idx, rxq->done_idx, rxq->len);
+}
+
+static void slic_clear_upr_list(struct slic_upr_list *upr_list)
+{
+	struct slic_upr *upr;
+	struct slic_upr *tmp;
+
+	spin_lock_bh(&upr_list->lock);
+	list_for_each_entry_safe(upr, tmp, &upr_list->list, list) {
+		list_del(&upr->list);
+		kfree(upr);
+	}
+	upr_list->pending = false;
+	spin_unlock_bh(&upr_list->lock);
+}
+
+static void slic_start_upr(struct slic_device *sdev, struct slic_upr *upr)
+{
+	u32 reg;
+
+	reg = (upr->type == SLIC_UPR_CONFIG) ? SLIC_REG_RCONFIG :
+					       SLIC_REG_LSTAT;
+	slic_write(sdev, reg, lower_32_bits(upr->paddr));
+	slic_flush_write(sdev);
+}
+
+static void slic_queue_upr(struct slic_device *sdev, struct slic_upr *upr)
+{
+	struct slic_upr_list *upr_list = &sdev->upr_list;
+	bool pending;
+
+	spin_lock_bh(&upr_list->lock);
+	pending = upr_list->pending;
+	INIT_LIST_HEAD(&upr->list);
+	list_add_tail(&upr->list, &upr_list->list);
+	upr_list->pending = true;
+	spin_unlock_bh(&upr_list->lock);
+
+	if (!pending)
+		slic_start_upr(sdev, upr);
+}
+
+static struct slic_upr *slic_dequeue_upr(struct slic_device *sdev)
+{
+	struct slic_upr_list *upr_list = &sdev->upr_list;
+	struct slic_upr *next_upr = NULL;
+	struct slic_upr *upr = NULL;
+
+	spin_lock_bh(&upr_list->lock);
+	if (!list_empty(&upr_list->list)) {
+		upr = list_first_entry(&upr_list->list, struct slic_upr, list);
+		list_del(&upr->list);
+
+		if (list_empty(&upr_list->list))
+			upr_list->pending = false;
+		else
+			next_upr = list_first_entry(&upr_list->list,
+						    struct slic_upr, list);
+	}
+	spin_unlock_bh(&upr_list->lock);
+	/* trigger processing of the next upr in list */
+	if (next_upr)
+		slic_start_upr(sdev, next_upr);
+
+	return upr;
+}
+
+static int slic_new_upr(struct slic_device *sdev, unsigned int type,
+			dma_addr_t paddr)
+{
+	struct slic_upr *upr;
+
+	upr = kmalloc(sizeof(*upr), GFP_ATOMIC);
+	if (!upr)
+		return -ENOMEM;
+	upr->type = type;
+	upr->paddr = paddr;
+
+	slic_queue_upr(sdev, upr);
+
+	return 0;
+}
+
+static void slic_set_mcast_bit(u64 *mcmask, unsigned char const *addr)
+{
+	u64 mask = *mcmask;
+	u8 crc;
+	/* Get the CRC polynomial for the mac address: we use bits 1-8 (lsb),
+	 * bitwise reversed, msb (= lsb bit 0 before bitrev) is automatically
+	 * discarded.
+	 */
+	crc = ether_crc(ETH_ALEN, addr) >> 23;
+	 /* we only have space on the SLIC for 64 entries */
+	crc &= 0x3F;
+	mask |= (u64)1 << crc;
+	*mcmask = mask;
+}
+
+/* must be called with link_lock held */
+static void slic_configure_rcv(struct slic_device *sdev)
+{
+	u32 val;
+
+	val = SLIC_GRCR_RESET | SLIC_GRCR_ADDRAEN | SLIC_GRCR_RCVEN |
+	      SLIC_GRCR_HASHSIZE << SLIC_GRCR_HASHSIZE_SHIFT | SLIC_GRCR_RCVBAD;
+
+	if (sdev->duplex == DUPLEX_FULL)
+		val |= SLIC_GRCR_CTLEN;
+
+	if (sdev->promisc)
+		val |= SLIC_GRCR_RCVALL;
+
+	slic_write(sdev, SLIC_REG_WRCFG, val);
+}
+
+/* must be called with link_lock held */
+static void slic_configure_xmt(struct slic_device *sdev)
+{
+	u32 val;
+
+	val = SLIC_GXCR_RESET | SLIC_GXCR_XMTEN;
+
+	if (sdev->duplex == DUPLEX_FULL)
+		val |= SLIC_GXCR_PAUSEEN;
+
+	slic_write(sdev, SLIC_REG_WXCFG, val);
+}
+
+/* must be called with link_lock held */
+static void slic_configure_mac(struct slic_device *sdev)
+{
+	u32 val;
+
+	if (sdev->speed == SPEED_1000) {
+		val = SLIC_GMCR_GAPBB_1000 << SLIC_GMCR_GAPBB_SHIFT |
+		      SLIC_GMCR_GAPR1_1000 << SLIC_GMCR_GAPR1_SHIFT |
+		      SLIC_GMCR_GAPR2_1000 << SLIC_GMCR_GAPR2_SHIFT |
+		      SLIC_GMCR_GBIT; /* enable GMII */
+	} else {
+		val = SLIC_GMCR_GAPBB_100 << SLIC_GMCR_GAPBB_SHIFT |
+		      SLIC_GMCR_GAPR1_100 << SLIC_GMCR_GAPR1_SHIFT |
+		      SLIC_GMCR_GAPR2_100 << SLIC_GMCR_GAPR2_SHIFT;
+	}
+
+	if (sdev->duplex == DUPLEX_FULL)
+		val |= SLIC_GMCR_FULLD;
+
+	slic_write(sdev, SLIC_REG_WMCFG, val);
+}
+
+static void slic_configure_link_locked(struct slic_device *sdev, int speed,
+				       unsigned int duplex)
+{
+	struct net_device *dev = sdev->netdev;
+
+	if (sdev->speed == speed && sdev->duplex == duplex)
+		return;
+
+	sdev->speed = speed;
+	sdev->duplex = duplex;
+
+	if (sdev->speed == SPEED_UNKNOWN) {
+		if (netif_carrier_ok(dev))
+			netif_carrier_off(dev);
+	} else {
+		/* (re)configure link settings */
+		slic_configure_mac(sdev);
+		slic_configure_xmt(sdev);
+		slic_configure_rcv(sdev);
+		slic_flush_write(sdev);
+
+		if (!netif_carrier_ok(dev))
+			netif_carrier_on(dev);
+	}
+}
+
+static void slic_configure_link(struct slic_device *sdev, int speed,
+				unsigned int duplex)
+{
+	spin_lock_bh(&sdev->link_lock);
+	slic_configure_link_locked(sdev, speed, duplex);
+	spin_unlock_bh(&sdev->link_lock);
+}
+
+static void slic_set_rx_mode(struct net_device *dev)
+{
+	struct slic_device *sdev = netdev_priv(dev);
+	struct netdev_hw_addr *hwaddr;
+	bool set_promisc;
+	u64 mcmask;
+
+	if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
+		/* Turn on all multicast addresses. We have to do this for
+		 * promiscuous mode as well as ALLMCAST mode (it saves the
+		 * microcode from having to keep state about the MAC
+		 * configuration).
+		 */
+		mcmask = ~(u64)0;
+	} else  {
+		mcmask = 0;
+
+		netdev_for_each_mc_addr(hwaddr, dev) {
+			slic_set_mcast_bit(&mcmask, hwaddr->addr);
+		}
+	}
+
+	slic_write(sdev, SLIC_REG_MCASTLOW, lower_32_bits(mcmask));
+	slic_write(sdev, SLIC_REG_MCASTHIGH, upper_32_bits(mcmask));
+
+	set_promisc = !!(dev->flags & IFF_PROMISC);
+
+	spin_lock_bh(&sdev->link_lock);
+	if (sdev->promisc != set_promisc) {
+		sdev->promisc = set_promisc;
+		slic_configure_rcv(sdev);
+		/* make sure writes to receiver cant leak out of the lock */
+		mmiowb();
+	}
+	spin_unlock_bh(&sdev->link_lock);
+}
+
+static void slic_xmit_complete(struct slic_device *sdev)
+{
+	struct slic_tx_queue *txq = &sdev->txq;
+	struct net_device *dev = sdev->netdev;
+	unsigned int idx = txq->done_idx;
+	struct slic_tx_buffer *buff;
+	unsigned int frames = 0;
+	unsigned int bytes = 0;
+
+	/* Limit processing to SLIC_MAX_TX_COMPLETIONS frames to avoid that new
+	 * completions during processing keeps the loop running endlessly.
+	 */
+	do {
+		idx = slic_next_compl_idx(sdev);
+		if (idx == SLIC_INVALID_STAT_DESC_IDX)
+			break;
+
+		txq->done_idx = idx;
+		buff = &txq->txbuffs[idx];
+
+		if (unlikely(!buff->skb)) {
+			netdev_warn(dev,
+				    "no skb found for desc idx %i\n", idx);
+			continue;
+		}
+		dma_unmap_single(&sdev->pdev->dev,
+				 dma_unmap_addr(buff, map_addr),
+				 dma_unmap_len(buff, map_len), DMA_TO_DEVICE);
+
+		bytes += buff->skb->len;
+		frames++;
+
+		dev_kfree_skb_any(buff->skb);
+		buff->skb = NULL;
+	} while (frames < SLIC_MAX_TX_COMPLETIONS);
+	/* make sure xmit sees the new value for done_idx */
+	smp_wmb();
+
+	u64_stats_update_begin(&sdev->stats.syncp);
+	sdev->stats.tx_bytes += bytes;
+	sdev->stats.tx_packets += frames;
+	u64_stats_update_end(&sdev->stats.syncp);
+
+	netif_tx_lock(dev);
+	if (netif_queue_stopped(dev) &&
+	    (slic_get_free_tx_descs(txq) >= SLIC_MIN_TX_WAKEUP_DESCS))
+		netif_wake_queue(dev);
+	netif_tx_unlock(dev);
+}
+
+static void slic_refill_rx_queue(struct slic_device *sdev, gfp_t gfp)
+{
+	const unsigned int ALIGN_MASK = SLIC_RX_BUFF_ALIGN - 1;
+	unsigned int maplen = SLIC_RX_BUFF_SIZE;
+	struct slic_rx_queue *rxq = &sdev->rxq;
+	struct net_device *dev = sdev->netdev;
+	struct slic_rx_buffer *buff;
+	struct slic_rx_desc *desc;
+	unsigned int misalign;
+	unsigned int offset;
+	struct sk_buff *skb;
+	dma_addr_t paddr;
+
+	while (slic_get_free_rx_descs(rxq) > SLIC_MAX_REQ_RX_DESCS) {
+		skb = alloc_skb(maplen + ALIGN_MASK, gfp);
+		if (!skb)
+			break;
+
+		paddr = dma_map_single(&sdev->pdev->dev, skb->data, maplen,
+				       DMA_FROM_DEVICE);
+		if (dma_mapping_error(&sdev->pdev->dev, paddr)) {
+			netdev_err(dev, "mapping rx packet failed\n");
+			/* drop skb */
+			dev_kfree_skb_any(skb);
+			break;
+		}
+		/* ensure head buffer descriptors are 256 byte aligned */
+		offset = 0;
+		misalign = paddr & ALIGN_MASK;
+		if (misalign) {
+			offset = SLIC_RX_BUFF_ALIGN - misalign;
+			skb_reserve(skb, offset);
+		}
+		/* the HW expects dma chunks for descriptor + frame data */
+		desc = (struct slic_rx_desc *)skb->data;
+		/* temporarily sync descriptor for CPU to clear status */
+		dma_sync_single_for_cpu(&sdev->pdev->dev, paddr,
+					offset + sizeof(*desc),
+					DMA_FROM_DEVICE);
+		desc->status = 0;
+		/* return it to HW again */
+		dma_sync_single_for_device(&sdev->pdev->dev, paddr,
+					   offset + sizeof(*desc),
+					   DMA_FROM_DEVICE);
+
+		buff = &rxq->rxbuffs[rxq->put_idx];
+		buff->skb = skb;
+		dma_unmap_addr_set(buff, map_addr, paddr);
+		dma_unmap_len_set(buff, map_len, maplen);
+		buff->addr_offset = offset;
+		/* complete write to descriptor before it is handed to HW */
+		wmb();
+		/* head buffer descriptors are placed immediately before skb */
+		slic_write(sdev, SLIC_REG_HBAR, lower_32_bits(paddr) + offset);
+		rxq->put_idx = slic_next_queue_idx(rxq->put_idx, rxq->len);
+	}
+}
+
+static void slic_handle_frame_error(struct slic_device *sdev,
+				    struct sk_buff *skb)
+{