diff options
Diffstat (limited to 'drivers/net/ethernet/alacritech')
| -rw-r--r-- | drivers/net/ethernet/alacritech/Kconfig | 29 | ||||
| -rw-r--r-- | drivers/net/ethernet/alacritech/Makefile | 5 | ||||
| -rw-r--r-- | drivers/net/ethernet/alacritech/slic.h | 573 | ||||
| -rw-r--r-- | drivers/net/ethernet/alacritech/slicoss.c | 1852 |
4 files changed, 2459 insertions, 0 deletions
diff --git a/drivers/net/ethernet/alacritech/Kconfig b/drivers/net/ethernet/alacritech/Kconfig new file mode 100644 index 000000000..5f285e18f --- /dev/null +++ b/drivers/net/ethernet/alacritech/Kconfig @@ -0,0 +1,29 @@ +# SPDX-License-Identifier: GPL-2.0-only +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 000000000..4378aadf8 --- /dev/null +++ b/drivers/net/ethernet/alacritech/Makefile @@ -0,0 +1,5 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# 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 000000000..4eecbdfff --- /dev/null +++ b/drivers/net/ethernet/alacritech/slic.h @@ -0,0 +1,573 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#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/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_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 000000000..a30d0f172 --- /dev/null +++ b/drivers/net/ethernet/alacritech/slicoss.c @@ -0,0 +1,1852 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * 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> + */ + +#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" + +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); + } + 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; + struct slic_tx_buffer *buff; + unsigned int frames = 0; + unsigned int bytes = 0; + unsigned int idx; + + /* 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) +{ + struct slic_stats *stats = &sdev->stats; + + if (sdev->model == SLIC_MODEL_OASIS) { + struct slic_rx_info_oasis *info; + u32 status_b; + u32 status; + + info = (struct slic_rx_info_oasis *)skb->data; + status = le32_to_cpu(info->frame_status); + status_b = le32_to_cpu(info->frame_status_b); + /* transport layer */ + if (status_b & SLIC_VRHSTATB_TPCSUM) + SLIC_INC_STATS_COUNTER(stats, rx_tpcsum); + if (status & SLIC_VRHSTAT_TPOFLO) + SLIC_INC_STATS_COUNTER(stats, rx_tpoflow); + if (status_b & SLIC_VRHSTATB_TPHLEN) + SLIC_INC_STATS_COUNTER(stats, rx_tphlen); + /* ip layer */ + if (status_b & SLIC_VRHSTATB_IPCSUM) + SLIC_INC_STATS_COUNTER(stats, rx_ipcsum); + if (status_b & SLIC_VRHSTATB_IPLERR) + SLIC_INC_STATS_COUNTER(stats, rx_iplen); + if (status_b & SLIC_VRHSTATB_IPHERR) + SLIC_INC_STATS_COUNTER(stats, rx_iphlen); + /* link layer */ + if (status_b & SLIC_VRHSTATB_RCVE) + SLIC_INC_STATS_COUNTER(stats, rx_early); + if (status_b & SLIC_VRHSTATB_BUFF) + SLIC_INC_STATS_COUNTER(stats, rx_buffoflow); + if (status_b & SLIC_VRHSTATB_CODE) + SLIC_INC_STATS_COUNTER(stats, rx_lcode); + if (status_b & SLIC_VRHSTATB_DRBL) + SLIC_INC_STATS_COUNTER(stats, rx_drbl); + if (status_b & SLIC_VRHSTATB_CRC) + SLIC_INC_STATS_COUNTER(stats, rx_crc); + if (status & SLIC_VRHSTAT_802OE) + SLIC_INC_STATS_COUNTER(stats, rx_oflow802); + if (status_b & SLIC_VRHSTATB_802UE) + SLIC_INC_STATS_COUNTER(stats, rx_uflow802); + if (status_b & SLIC_VRHSTATB_CARRE) + SLIC_INC_STATS_COUNTER(stats, tx_carrier); + } else { /* mojave */ + struct slic_rx_info_mojave *info; + u32 status; + + info = (struct slic_rx_info_mojave *)skb->data; + status = le32_to_cpu(info->frame_status); + /* transport layer */ + if (status & SLIC_VGBSTAT_XPERR) { + u32 xerr = status >> SLIC_VGBSTAT_XERRSHFT; + + if (xerr == SLIC_VGBSTAT_XCSERR) + SLIC_INC_STATS_COUNTER(stats, rx_tpcsum); + if (xerr == SLIC_VGBSTAT_XUFLOW) + SLIC_INC_STATS_COUNTER(stats, rx_tpoflow); + if (xerr == SLIC_VGBSTAT_XHLEN) + SLIC_INC_STATS_COUNTER(stats, rx_tphlen); + } + /* ip layer */ + if (status & SLIC_VGBSTAT_NETERR) { + u32 nerr = status >> SLIC_VGBSTAT_NERRSHFT & + SLIC_VGBSTAT_NERRMSK; + + if (nerr == SLIC_VGBSTAT_NCSERR) + SLIC_INC_STATS_COUNTER(stats, rx_ipcsum); + if (nerr == SLIC_VGBSTAT_NUFLOW) + SLIC_INC_STATS_COUNTER(stats, rx_iplen); + if (nerr == SLIC_VGBSTAT_NHLEN) + SLIC_INC_STATS_COUNTER(stats, rx_iphlen); + } + /* link layer */ + if (status & SLIC_VGBSTAT_LNKERR) { + u32 lerr = status & SLIC_VGBSTAT_LERRMSK; + + if (lerr == SLIC_VGBSTAT_LDEARLY) + SLIC_INC_STATS_COUNTER(stats, rx_early); + if (lerr == SLIC_VGBSTAT_LBOFLO) + SLIC_INC_STATS_COUNTER(stats, rx_buffoflow); + if (lerr == SLIC_VGBSTAT_LCODERR) + SLIC_INC_STATS_COUNTER(stats, rx_lcode); + if (lerr == SLIC_VGBSTAT_LDBLNBL) + SLIC_INC_STATS_COUNTER(stats, rx_drbl); + if (lerr == SLIC_VGBSTAT_LCRCERR) + SLIC_INC_STATS_COUNTER(stats, rx_crc); + if (lerr == SLIC_VGBSTAT_LOFLO) + SLIC_INC_STATS_COUNTER(stats, rx_oflow802); + if (lerr == SLIC_VGBSTAT_LUFLO) + SLIC_INC_STATS_COUNTER(stats, rx_uflow802); + } + } + SLIC_INC_STATS_COUNTER(stats, rx_errors); +} + +static void slic_handle_receive(struct slic_device *sdev, unsigned int todo, + unsigned int *done) +{ + 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 frames = 0; + unsigned int bytes = 0; + struct sk_buff *skb; + u32 status; + u32 len; + + while (todo && (rxq->done_idx != rxq->put_idx)) { + buff = &rxq->rxbuffs[rxq->done_idx]; + + skb = buff->skb; + if (!skb) + break; + + desc = (struct slic_rx_desc *)skb->data; + + dma_sync_single_for_cpu(&sdev->pdev->dev, + dma_unmap_addr(buff, map_addr), + buff->addr_offset + sizeof(*desc), + DMA_FROM_DEVICE); + + status = le32_to_cpu(desc->status); + if (!(status & SLIC_IRHDDR_SVALID)) { + dma_sync_single_for_device(&sdev->pdev->dev, + dma_unmap_addr(buff, + map_addr), + buff->addr_offset + + sizeof(*desc), + DMA_FROM_DEVICE); + break; + } + + buff->skb = NULL; + + dma_unmap_single(&sdev->pdev->dev, + dma_unmap_addr(buff, map_addr), + dma_unmap_len(buff, map_len), + DMA_FROM_DEVICE); + + /* skip rx descriptor that is placed before the frame data */ + skb_reserve(skb, SLIC_RX_BUFF_HDR_SIZE); + + if (unlikely(status & SLIC_IRHDDR_ERR)) { + slic_handle_frame_error(sdev, skb); + dev_kfree_skb_any(skb); + } else { + struct ethhdr *eh = (struct ethhdr *)skb->data; + + if (is_multicast_ether_addr(eh->h_dest)) + SLIC_INC_STATS_COUNTER(&sdev->stats, rx_mcasts); + + len = le32_to_cpu(desc->length) & SLIC_IRHDDR_FLEN_MSK; + skb_put(skb, len); + skb->protocol = eth_type_trans(skb, dev); + skb->ip_summed = CHECKSUM_UNNECESSARY; + + napi_gro_receive(&sdev->napi, skb); + + bytes += len; + frames++; + } + rxq->done_idx = slic_next_queue_idx(rxq->done_idx, rxq->len); + todo--; + } + + u64_stats_update_begin(&sdev->stats.syncp); + sdev->stats.rx_bytes += bytes; + sdev->stats.rx_packets += frames; + u64_stats_update_end(&sdev->stats.syncp); + + slic_refill_rx_queue(sdev, GFP_ATOMIC); +} + +static void slic_handle_link_irq(struct slic_device *sdev) +{ + struct slic_shmem *sm = &sdev->shmem; + struct slic_shmem_data *sm_data = sm->shmem_data; + unsigned int duplex; + int speed; + u32 link; + + link = le32_to_cpu(sm_data->link); + + if (link & SLIC_GIG_LINKUP) { + if (link & SLIC_GIG_SPEED_1000) + speed = SPEED_1000; + else if (link & SLIC_GIG_SPEED_100) + speed = SPEED_100; + else + speed = SPEED_10; + + duplex = (link & SLIC_GIG_FULLDUPLEX) ? DUPLEX_FULL : + DUPLEX_HALF; + } else { + duplex = DUPLEX_UNKNOWN; + speed = SPEED_UNKNOWN; + } + slic_configure_link(sdev, speed, duplex); +} + +static void slic_handle_upr_irq(struct slic_device *sdev, u32 irqs) +{ + struct slic_upr *upr; + + /* remove upr that caused this irq (always the first entry in list) */ + upr = slic_dequeue_upr(sdev); + if (!upr) { + netdev_warn(sdev->netdev, "no upr found on list\n"); + return; + } + + if (upr->type == SLIC_UPR_LSTAT) { + if (unlikely(irqs & SLIC_ISR_UPCERR_MASK)) { + /* try again */ + slic_queue_upr(sdev, upr); + return; + } + slic_handle_link_irq(sdev); + } + kfree(upr); +} + +static int slic_handle_link_change(struct slic_device *sdev) +{ + return slic_new_upr(sdev, SLIC_UPR_LSTAT, sdev->shmem.link_paddr); +} + +static void slic_handle_err_irq(struct slic_device *sdev, u32 isr) +{ + struct slic_stats *stats = &sdev->stats; + + if (isr & SLIC_ISR_RMISS) + SLIC_INC_STATS_COUNTER(stats, rx_buff_miss); + if (isr & SLIC_ISR_XDROP) + SLIC_INC_STATS_COUNTER(stats, tx_dropped); + if (!(isr & (SLIC_ISR_RMISS | SLIC_ISR_XDROP))) + SLIC_INC_STATS_COUNTER(stats, irq_errs); +} + +static void slic_handle_irq(struct slic_device *sdev, u32 isr, + unsigned int todo, unsigned int *done) +{ + if (isr & SLIC_ISR_ERR) + slic_handle_err_irq(sdev, isr); + + if (isr & SLIC_ISR_LEVENT) + slic_handle_link_change(sdev); + + if (isr & SLIC_ISR_UPC_MASK) + slic_handle_upr_irq(sdev, isr); + + if (isr & SLIC_ISR_RCV) + slic_handle_receive(sdev, todo, done); + + if (isr & SLIC_ISR_CMD) + slic_xmit_complete(sdev); +} + +static int slic_poll(struct napi_struct *napi, int todo) +{ + struct slic_device *sdev = container_of(napi, struct slic_device, napi); + struct slic_shmem *sm = &sdev->shmem; + struct slic_shmem_data *sm_data = sm->shmem_data; + u32 isr = le32_to_cpu(sm_data->isr); + int done = 0; + + slic_handle_irq(sdev, isr, todo, &done); + + if (done < todo) { + napi_complete_done(napi, done); + /* reenable irqs */ + sm_data->isr = 0; + /* make sure sm_data->isr is cleard before irqs are reenabled */ + wmb(); + slic_write(sdev, SLIC_REG_ISR, 0); + slic_flush_write(sdev); + } + + return done; +} + +static irqreturn_t slic_irq(int irq, void *dev_id) +{ + struct slic_device *sdev = dev_id; + struct slic_shmem *sm = &sdev->shmem; + struct slic_shmem_data *sm_data = sm->shmem_data; + + slic_write(sdev, SLIC_REG_ICR, SLIC_ICR_INT_MASK); + slic_flush_write(sdev); + /* make sure sm_data->isr is read after ICR_INT_MASK is set */ + wmb(); + + if (!sm_data->isr) { + dma_rmb(); + /* spurious interrupt */ + slic_write(sdev, SLIC_REG_ISR, 0); + slic_flush_write(sdev); + return IRQ_NONE; + } + + napi_schedule_irqoff(&sdev->napi); + + return IRQ_HANDLED; +} + +static void slic_card_reset(struct slic_device *sdev) +{ + u16 cmd; + + slic_write(sdev, SLIC_REG_RESET, SLIC_RESET_MAGIC); + /* flush write by means of config space */ + pci_read_config_word(sdev->pdev, PCI_COMMAND, &cmd); + mdelay(1); +} + +static int slic_init_stat_queue(struct slic_device *sdev) +{ + const unsigned int DESC_ALIGN_MASK = SLIC_STATS_DESC_ALIGN - 1; + struct slic_stat_queue *stq = &sdev->stq; + struct slic_stat_desc *descs; + unsigned int misalign; + unsigned int offset; + dma_addr_t paddr; + size_t size; + int err; + int i; + + stq->len = SLIC_NUM_STAT_DESCS; + stq->active_array = 0; + stq->done_idx = 0; + + size = stq->len * sizeof(*descs) + DESC_ALIGN_MASK; + + for (i = 0; i < SLIC_NUM_STAT_DESC_ARRAYS; i++) { + descs = dma_alloc_coherent(&sdev->pdev->dev, size, &paddr, + GFP_KERNEL); + if (!descs) { + netdev_err(sdev->netdev, + "failed to allocate status descriptors\n"); + err = -ENOMEM; + goto free_descs; + } + /* ensure correct alignment */ + offset = 0; + misalign = paddr & DESC_ALIGN_MASK; + if (misalign) { + offset = SLIC_STATS_DESC_ALIGN - misalign; + descs += offset; + paddr += offset; + } + + slic_write(sdev, SLIC_REG_RBAR, lower_32_bits(paddr) | + stq->len); + stq->descs[i] = descs; + stq->paddr[i] = paddr; + stq->addr_offset[i] = offset; + } + + stq->mem_size = size; + + return 0; + +free_descs: + while (i--) { + dma_free_coherent(&sdev->pdev->dev, stq->mem_size, + stq->descs[i] - stq->addr_offset[i], + stq->paddr[i] - stq->addr_offset[i]); + } + + return err; +} + +static void slic_free_stat_queue(struct slic_device *sdev) +{ + struct slic_stat_queue *stq = &sdev->stq; + int i; + + for (i = 0; i < SLIC_NUM_STAT_DESC_ARRAYS; i++) { + dma_free_coherent(&sdev->pdev->dev, stq->mem_size, + stq->descs[i] - stq->addr_offset[i], + stq->paddr[i] - stq->addr_offset[i]); + } +} + +static int slic_init_tx_queue(struct slic_device *sdev) +{ + struct slic_tx_queue *txq = &sdev->txq; + struct slic_tx_buffer *buff; + struct slic_tx_desc *desc; + unsigned int i; + int err; + + txq->len = SLIC_NUM_TX_DESCS; + txq->put_idx = 0; + txq->done_idx = 0; + + txq->txbuffs = kcalloc(txq->len, sizeof(*buff), GFP_KERNEL); + if (!txq->txbuffs) + return -ENOMEM; + + txq->dma_pool = dma_pool_create("slic_pool", &sdev->pdev->dev, + sizeof(*desc), SLIC_TX_DESC_ALIGN, + 4096); + if (!txq->dma_pool) { + err = -ENOMEM; + netdev_err(sdev->netdev, "failed to create dma pool\n"); + goto free_buffs; + } + + for (i = 0; i < txq->len; i++) { + buff = &txq->txbuffs[i]; + desc = dma_pool_zalloc(txq->dma_pool, GFP_KERNEL, + &buff->desc_paddr); + if (!desc) { + netdev_err(sdev->netdev, + "failed to alloc pool chunk (%i)\n", i); + err = -ENOMEM; + goto free_descs; + } + + desc->hnd = cpu_to_le32((u32)(i + 1)); + desc->cmd = SLIC_CMD_XMT_REQ; + desc->flags = 0; + desc->type = cpu_to_le32(SLIC_CMD_TYPE_DUMB); + buff->desc = desc; + } + + return 0; + +free_descs: + while (i--) { + buff = &txq->txbuffs[i]; + dma_pool_free(txq->dma_pool, buff->desc, buff->desc_paddr); + } + dma_pool_destroy(txq->dma_pool); + +free_buffs: + kfree(txq->txbuffs); + + return err; +} + +static void slic_free_tx_queue(struct slic_device *sdev) +{ + struct slic_tx_queue *txq = &sdev->txq; + struct slic_tx_buffer *buff; + unsigned int i; + + for (i = 0; i < txq->len; i++) { + buff = &txq->txbuffs[i]; + dma_pool_free(txq->dma_pool, buff->desc, buff->desc_paddr); + if (!buff->skb) + continue; + + dma_unmap_single(&sdev->pdev->dev, + dma_unmap_addr(buff, map_addr), + dma_unmap_len(buff, map_len), DMA_TO_DEVICE); + consume_skb(buff->skb); + } + dma_pool_destroy(txq->dma_pool); + + kfree(txq->txbuffs); +} + +static int slic_init_rx_queue(struct slic_device *sdev) +{ + struct slic_rx_queue *rxq = &sdev->rxq; + struct slic_rx_buffer *buff; + + rxq->len = SLIC_NUM_RX_LES; + rxq->done_idx = 0; + rxq->put_idx = 0; + + buff = kcalloc(rxq->len, sizeof(*buff), GFP_KERNEL); + if (!buff) + return -ENOMEM; + + rxq->rxbuffs = buff; + slic_refill_rx_queue(sdev, GFP_KERNEL); + + return 0; +} + +static void slic_free_rx_queue(struct slic_device *sdev) +{ + struct slic_rx_queue *rxq = &sdev->rxq; + struct slic_rx_buffer *buff; + unsigned int i; + + /* free rx buffers */ + for (i = 0; i < rxq->len; i++) { + buff = &rxq->rxbuffs[i]; + + if (!buff->skb) + continue; + + dma_unmap_single(&sdev->pdev->dev, + dma_unmap_addr(buff, map_addr), + dma_unmap_len(buff, map_len), + DMA_FROM_DEVICE); + consume_skb(buff->skb); + } + kfree(rxq->rxbuffs); +} + +static void slic_set_link_autoneg(struct slic_device *sdev) +{ + unsigned int subid = sdev->pdev->subsystem_device; + u32 val; + + if (sdev->is_fiber) { + /* We've got a fiber gigabit interface, and register 4 is + * different in fiber mode than in copper mode. + */ + /* advertise FD only @1000 Mb */ + val = MII_ADVERTISE << 16 | ADVERTISE_1000XFULL | + ADVERTISE_1000XPAUSE | ADVERTISE_1000XPSE_ASYM; + /* enable PAUSE frames */ + slic_write(sdev, SLIC_REG_WPHY, val); + /* reset phy, enable auto-neg */ + val = MII_BMCR << 16 | BMCR_RESET | BMCR_ANENABLE | + BMCR_ANRESTART; + slic_write(sdev, SLIC_REG_WPHY, val); + } else { /* copper gigabit */ + /* We've got a copper gigabit interface, and register 4 is + * different in copper mode than in fiber mode. + */ + /* advertise 10/100 Mb modes */ + val = MII_ADVERTISE << 16 | ADVERTISE_100FULL | + ADVERTISE_100HALF | ADVERTISE_10FULL | ADVERTISE_10HALF; + /* enable PAUSE frames */ + val |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM; + /* required by the Cicada PHY */ + val |= ADVERTISE_CSMA; + slic_write(sdev, SLIC_REG_WPHY, val); + + /* advertise FD only @1000 Mb */ + val = MII_CTRL1000 << 16 | ADVERTISE_1000FULL; + slic_write(sdev, SLIC_REG_WPHY, val); + + if (subid != PCI_SUBDEVICE_ID_ALACRITECH_CICADA) { + /* if a Marvell PHY enable auto crossover */ + val = SLIC_MIICR_REG_16 | SLIC_MRV_REG16_XOVERON; + slic_write(sdev, SLIC_REG_WPHY, val); + + /* reset phy, enable auto-neg */ + val = MII_BMCR << 16 | BMCR_RESET | BMCR_ANENABLE | + BMCR_ANRESTART; + slic_write(sdev, SLIC_REG_WPHY, val); + } else { + /* enable and restart auto-neg (don't reset) */ + val = MII_BMCR << 16 | BMCR_ANENABLE | BMCR_ANRESTART; + slic_write(sdev, SLIC_REG_WPHY, val); + } + } +} + +static void slic_set_mac_address(struct slic_device *sdev) +{ + const u8 *addr = sdev->netdev->dev_addr; + u32 val; + + val = addr[5] | addr[4] << 8 | addr[3] << 16 | addr[2] << 24; + + slic_write(sdev, SLIC_REG_WRADDRAL, val); + slic_write(sdev, SLIC_REG_WRADDRBL, val); + + val = addr[0] << 8 | addr[1]; + + slic_write(sdev, SLIC_REG_WRADDRAH, val); + slic_write(sdev, SLIC_REG_WRADDRBH, val); + slic_flush_write(sdev); +} + +static u32 slic_read_dword_from_firmware(const struct firmware *fw, int *offset) +{ + int idx = *offset; + __le32 val; + + memcpy(&val, fw->data + *offset, sizeof(val)); + idx += 4; + *offset = idx; + + return le32_to_cpu(val); +} + +MODULE_FIRMWARE(SLIC_RCV_FIRMWARE_MOJAVE); +MODULE_FIRMWARE(SLIC_RCV_FIRMWARE_OASIS); + +static int slic_load_rcvseq_firmware(struct slic_device *sdev) +{ + const struct firmware *fw; + const char *file; + u32 codelen; + int idx = 0; + u32 instr; + u32 addr; + int err; + + file = (sdev->model == SLIC_MODEL_OASIS) ? SLIC_RCV_FIRMWARE_OASIS : + SLIC_RCV_FIRMWARE_MOJAVE; + err = request_firmware(&fw, file, &sdev->pdev->dev); + if (err) { + dev_err(&sdev->pdev->dev, + "failed to load receive sequencer firmware %s\n", file); + return err; + } + /* Do an initial sanity check concerning firmware size now. A further + * check follows below. + */ + if (fw->size < SLIC_FIRMWARE_MIN_SIZE) { + dev_err(&sdev->pdev->dev, + "invalid firmware size %zu (min %u expected)\n", + fw->size, SLIC_FIRMWARE_MIN_SIZE); + err = -EINVAL; + goto release; + } + + codelen = slic_read_dword_from_firmware(fw, &idx); + + /* do another sanity check against firmware size */ + if ((codelen + 4) > fw->size) { + dev_err(&sdev->pdev->dev, + "invalid rcv-sequencer firmware size %zu\n", fw->size); + err = -EINVAL; + goto release; + } + + /* download sequencer code to card */ + slic_write(sdev, SLIC_REG_RCV_WCS, SLIC_RCVWCS_BEGIN); + for (addr = 0; addr < codelen; addr++) { + __le32 val; + /* write out instruction address */ + slic_write(sdev, SLIC_REG_RCV_WCS, addr); + + instr = slic_read_dword_from_firmware(fw, &idx); + /* write out the instruction data low addr */ + slic_write(sdev, SLIC_REG_RCV_WCS, instr); + + val = (__le32)fw->data[idx]; + instr = le32_to_cpu(val); + idx++; + /* write out the instruction data high addr */ + slic_write(sdev, SLIC_REG_RCV_WCS, instr); + } + /* finish download */ + slic_write(sdev, SLIC_REG_RCV_WCS, SLIC_RCVWCS_FINISH); + slic_flush_write(sdev); +release: + release_firmware(fw); + + return err; +} + +MODULE_FIRMWARE(SLIC_FIRMWARE_MOJAVE); +MODULE_FIRMWARE(SLIC_FIRMWARE_OASIS); + +static int slic_load_firmware(struct slic_device *sdev) +{ + u32 sectstart[SLIC_FIRMWARE_MAX_SECTIONS]; + u32 sectsize[SLIC_FIRMWARE_MAX_SECTIONS]; + const struct firmware *fw; + unsigned int datalen; + const char *file; + int code_start; + unsigned int i; + u32 numsects; + int idx = 0; + u32 sect; + u32 instr; + u32 addr; + u32 base; + int err; + + file = (sdev->model == SLIC_MODEL_OASIS) ? SLIC_FIRMWARE_OASIS : + SLIC_FIRMWARE_MOJAVE; + err = request_firmware(&fw, file, &sdev->pdev->dev); + if (err) { + dev_err(&sdev->pdev->dev, "failed to load firmware %s\n", file); + return err; + } + /* Do an initial sanity check concerning firmware size now. A further + * check follows below. + */ + if (fw->size < SLIC_FIRMWARE_MIN_SIZE) { + dev_err(&sdev->pdev->dev, + "invalid firmware size %zu (min is %u)\n", fw->size, + SLIC_FIRMWARE_MIN_SIZE); + err = -EINVAL; + goto release; + } + + numsects = slic_read_dword_from_firmware(fw, &idx); + if (numsects == 0 || numsects > SLIC_FIRMWARE_MAX_SECTIONS) { + dev_err(&sdev->pdev->dev, + "invalid number of sections in firmware: %u", numsects); + err = -EINVAL; + goto release; + } + + datalen = numsects * 8 + 4; + for (i = 0; i < numsects; i++) { + sectsize[i] = slic_read_dword_from_firmware(fw, &idx); + datalen += sectsize[i]; + } + + /* do another sanity check against firmware size */ + if (datalen > fw->size) { + dev_err(&sdev->pdev->dev, + "invalid firmware size %zu (expected >= %u)\n", + fw->size, datalen); + err = -EINVAL; + goto release; + } + /* get sections */ + for (i = 0; i < numsects; i++) + sectstart[i] = slic_read_dword_from_firmware(fw, &idx); + + code_start = idx; + instr = slic_read_dword_from_firmware(fw, &idx); + + for (sect = 0; sect < numsects; sect++) { + unsigned int ssize = sectsize[sect] >> 3; + + base = sectstart[sect]; + + for (addr = 0; addr < ssize; addr++) { + /* write out instruction address */ + slic_write(sdev, SLIC_REG_WCS, base + addr); + /* write out instruction to low addr */ + slic_write(sdev, SLIC_REG_WCS, instr); + instr = slic_read_dword_from_firmware(fw, &idx); + /* write out instruction to high addr */ + slic_write(sdev, SLIC_REG_WCS, instr); + instr = slic_read_dword_from_firmware(fw, &idx); + } + } + + idx = code_start; + + for (sect = 0; sect < numsects; sect++) { + unsigned int ssize = sectsize[sect] >> 3; + + instr = slic_read_dword_from_firmware(fw, &idx); + base = sectstart[sect]; + if (base < 0x8000) + continue; + + for (addr = 0; addr < ssize; addr++) { + /* write out instruction address */ + slic_write(sdev, SLIC_REG_WCS, + SLIC_WCS_COMPARE | (base + addr)); + /* write out instruction to low addr */ + slic_write(sdev, SLIC_REG_WCS, instr); + instr = slic_read_dword_from_firmware(fw, &idx); + /* write out instruction to high addr */ + slic_write(sdev, SLIC_REG_WCS, instr); + instr = slic_read_dword_from_firmware(fw, &idx); + } + } + slic_flush_write(sdev); + mdelay(10); + /* everything OK, kick off the card */ + slic_write(sdev, SLIC_REG_WCS, SLIC_WCS_START); + slic_flush_write(sdev); + /* wait long enough for ucode to init card and reach the mainloop */ + mdelay(20); +release: + release_firmware(fw); + + return err; +} + +static int slic_init_shmem(struct slic_device *sdev) +{ + struct slic_shmem *sm = &sdev->shmem; + struct slic_shmem_data *sm_data; + dma_addr_t paddr; + + sm_data = dma_alloc_coherent(&sdev->pdev->dev, sizeof(*sm_data), + &paddr, GFP_KERNEL); + if (!sm_data) { + dev_err(&sdev->pdev->dev, "failed to allocate shared memory\n"); + return -ENOMEM; + } + + sm->shmem_data = sm_data; + sm->isr_paddr = paddr; + sm->link_paddr = paddr + offsetof(struct slic_shmem_data, link); + + return 0; +} + +static void slic_free_shmem(struct slic_device *sdev) +{ + struct slic_shmem *sm = &sdev->shmem; + struct slic_shmem_data *sm_data = sm->shmem_data; + + dma_free_coherent(&sdev->pdev->dev, sizeof(*sm_data), sm_data, + sm->isr_paddr); +} + +static int slic_init_iface(struct slic_device *sdev) +{ + struct slic_shmem *sm = &sdev->shmem; + int err; + + sdev->upr_list.pending = false; + + err = slic_init_shmem(sdev); + if (err) { + netdev_err(sdev->netdev, "failed to init shared memory\n"); + return err; + } + + err = slic_load_firmware(sdev); + if (err) { + netdev_err(sdev->netdev, "failed to load firmware\n"); + goto free_sm; + } + + err = slic_load_rcvseq_firmware(sdev); + if (err) { + netdev_err(sdev->netdev, + "failed to load firmware for receive sequencer\n"); + goto free_sm; + } + + slic_write(sdev, SLIC_REG_ICR, SLIC_ICR_INT_OFF); + slic_flush_write(sdev); + mdelay(1); + + err = slic_init_rx_queue(sdev); + if (err) { + netdev_err(sdev->netdev, "failed to init rx queue: %u\n", err); + goto free_sm; + } + + err = slic_init_tx_queue(sdev); + if (err) { + netdev_err(sdev->netdev, "failed to init tx queue: %u\n", err); + goto free_rxq; + } + + err = slic_init_stat_queue(sdev); + if (err) { + netdev_err(sdev->netdev, "failed to init status queue: %u\n", + err); + goto free_txq; + } + + slic_write(sdev, SLIC_REG_ISP, lower_32_bits(sm->isr_paddr)); + napi_enable(&sdev->napi); + /* disable irq mitigation */ + slic_write(sdev, SLIC_REG_INTAGG, 0); + slic_write(sdev, SLIC_REG_ISR, 0); + slic_flush_write(sdev); + + slic_set_mac_address(sdev); + + spin_lock_bh(&sdev->link_lock); + sdev->duplex = DUPLEX_UNKNOWN; + sdev->speed = SPEED_UNKNOWN; + spin_unlock_bh(&sdev->link_lock); + + slic_set_link_autoneg(sdev); + + err = request_irq(sdev->pdev->irq, slic_irq, IRQF_SHARED, DRV_NAME, + sdev); + if (err) { + netdev_err(sdev->netdev, "failed to request irq: %u\n", err); + goto disable_napi; + } + + slic_write(sdev, SLIC_REG_ICR, SLIC_ICR_INT_ON); + slic_flush_write(sdev); + /* request initial link status */ + err = slic_handle_link_change(sdev); + if (err) + netdev_warn(sdev->netdev, + "failed to set initial link state: %u\n", err); + return 0; + +disable_napi: + napi_disable(&sdev->napi); + slic_free_stat_queue(sdev); +free_txq: + slic_free_tx_queue(sdev); +free_rxq: + slic_free_rx_queue(sdev); +free_sm: + slic_free_shmem(sdev); + slic_card_reset(sdev); + + return err; +} + +static int slic_open(struct net_device *dev) +{ + struct slic_device *sdev = netdev_priv(dev); + int err; + + netif_carrier_off(dev); + + err = slic_init_iface(sdev); + if (err) { + netdev_err(dev, "failed to initialize interface: %i\n", err); + return err; + } + + netif_start_queue(dev); + + return 0; +} + +static int slic_close(struct net_device *dev) +{ + struct slic_device *sdev = netdev_priv(dev); + u32 val; + + netif_stop_queue(dev); + + /* stop irq handling */ + napi_disable(&sdev->napi); + slic_write(sdev, SLIC_REG_ICR, SLIC_ICR_INT_OFF); + slic_write(sdev, SLIC_REG_ISR, 0); + slic_flush_write(sdev); + + free_irq(sdev->pdev->irq, sdev); + /* turn off RCV and XMT and power down PHY */ + val = SLIC_GXCR_RESET | SLIC_GXCR_PAUSEEN; + slic_write(sdev, SLIC_REG_WXCFG, val); + + val = SLIC_GRCR_RESET | SLIC_GRCR_CTLEN | SLIC_GRCR_ADDRAEN | + SLIC_GRCR_HASHSIZE << SLIC_GRCR_HASHSIZE_SHIFT; + slic_write(sdev, SLIC_REG_WRCFG, val); + + val = MII_BMCR << 16 | BMCR_PDOWN; + slic_write(sdev, SLIC_REG_WPHY, val); + slic_flush_write(sdev); + + slic_clear_upr_list(&sdev->upr_list); + slic_write(sdev, SLIC_REG_QUIESCE, 0); + + slic_free_stat_queue(sdev); + slic_free_tx_queue(sdev); + slic_free_rx_queue(sdev); + slic_free_shmem(sdev); + + slic_card_reset(sdev); + netif_carrier_off(dev); + + return 0; +} + +static netdev_tx_t slic_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct slic_device *sdev = netdev_priv(dev); + struct slic_tx_queue *txq = &sdev->txq; + struct slic_tx_buffer *buff; + struct slic_tx_desc *desc; + dma_addr_t paddr; + u32 cbar_val; + u32 maplen; + + if (unlikely(slic_get_free_tx_descs(txq) < SLIC_MAX_REQ_TX_DESCS)) { + netdev_err(dev, "BUG! not enough tx LEs left: %u\n", + slic_get_free_tx_descs(txq)); + return NETDEV_TX_BUSY; + } + + maplen = skb_headlen(skb); + paddr = dma_map_single(&sdev->pdev->dev, skb->data, maplen, + DMA_TO_DEVICE); + if (dma_mapping_error(&sdev->pdev->dev, paddr)) { + netdev_err(dev, "failed to map tx buffer\n"); + goto drop_skb; + } + + buff = &txq->txbuffs[txq->put_idx]; + buff->skb = skb; + dma_unmap_addr_set(buff, map_addr, paddr); + dma_unmap_len_set(buff, map_len, maplen); + + desc = buff->desc; + desc->totlen = cpu_to_le32(maplen); + desc->paddrl = cpu_to_le32(lower_32_bits(paddr)); + desc->paddrh = cpu_to_le32(upper_32_bits(paddr)); + desc->len = cpu_to_le32(maplen); + + txq->put_idx = slic_next_queue_idx(txq->put_idx, txq->len); + + cbar_val = lower_32_bits(buff->desc_paddr) | 1; + /* complete writes to RAM and DMA before hardware is informed */ + wmb(); + + slic_write(sdev, SLIC_REG_CBAR, cbar_val); + + if (slic_get_free_tx_descs(txq) < SLIC_MAX_REQ_TX_DESCS) + netif_stop_queue(dev); + + return NETDEV_TX_OK; +drop_skb: + dev_kfree_skb_any(skb); + + return NETDEV_TX_OK; +} + +static void slic_get_stats(struct net_device *dev, + struct rtnl_link_stats64 *lst) +{ + struct slic_device *sdev = netdev_priv(dev); + struct slic_stats *stats = &sdev->stats; + + SLIC_GET_STATS_COUNTER(lst->rx_packets, stats, rx_packets); + SLIC_GET_STATS_COUNTER(lst->tx_packets, stats, tx_packets); + SLIC_GET_STATS_COUNTER(lst->rx_bytes, stats, rx_bytes); + SLIC_GET_STATS_COUNTER(lst->tx_bytes, stats, tx_bytes); + SLIC_GET_STATS_COUNTER(lst->rx_errors, stats, rx_errors); + SLIC_GET_STATS_COUNTER(lst->rx_dropped, stats, rx_buff_miss); + SLIC_GET_STATS_COUNTER(lst->tx_dropped, stats, tx_dropped); + SLIC_GET_STATS_COUNTER(lst->multicast, stats, rx_mcasts); + SLIC_GET_STATS_COUNTER(lst->rx_over_errors, stats, rx_buffoflow); + SLIC_GET_STATS_COUNTER(lst->rx_crc_errors, stats, rx_crc); + SLIC_GET_STATS_COUNTER(lst->rx_fifo_errors, stats, rx_oflow802); + SLIC_GET_STATS_COUNTER(lst->tx_carrier_errors, stats, tx_carrier); +} + +static int slic_get_sset_count(struct net_device *dev, int sset) +{ + switch (sset) { + case ETH_SS_STATS: + return ARRAY_SIZE(slic_stats_strings); + default: + return -EOPNOTSUPP; + } +} + +static void slic_get_ethtool_stats(struct net_device *dev, + struct ethtool_stats *eth_stats, u64 *data) +{ + struct slic_device *sdev = netdev_priv(dev); + struct slic_stats *stats = &sdev->stats; + + SLIC_GET_STATS_COUNTER(data[0], stats, rx_packets); + SLIC_GET_STATS_COUNTER(data[1], stats, rx_bytes); + SLIC_GET_STATS_COUNTER(data[2], stats, rx_mcasts); + SLIC_GET_STATS_COUNTER(data[3], stats, rx_errors); + SLIC_GET_STATS_COUNTER(data[4], stats, rx_buff_miss); + SLIC_GET_STATS_COUNTER(data[5], stats, rx_tpcsum); + SLIC_GET_STATS_COUNTER(data[6], stats, rx_tpoflow); + SLIC_GET_STATS_COUNTER(data[7], stats, rx_tphlen); + SLIC_GET_STATS_COUNTER(data[8], stats, rx_ipcsum); + SLIC_GET_STATS_COUNTER(data[9], stats, rx_iplen); + SLIC_GET_STATS_COUNTER(data[10], stats, rx_iphlen); + SLIC_GET_STATS_COUNTER(data[11], stats, rx_early); + SLIC_GET_STATS_COUNTER(data[12], stats, rx_buffoflow); + SLIC_GET_STATS_COUNTER(data[13], stats, rx_lcode); + SLIC_GET_STATS_COUNTER(data[14], stats, rx_drbl); + SLIC_GET_STATS_COUNTER(data[15], stats, rx_crc); + SLIC_GET_STATS_COUNTER(data[16], stats, rx_oflow802); + SLIC_GET_STATS_COUNTER(data[17], stats, rx_uflow802); + SLIC_GET_STATS_COUNTER(data[18], stats, tx_packets); + SLIC_GET_STATS_COUNTER(data[19], stats, tx_bytes); + SLIC_GET_STATS_COUNTER(data[20], stats, tx_carrier); + SLIC_GET_STATS_COUNTER(data[21], stats, tx_dropped); + SLIC_GET_STATS_COUNTER(data[22], stats, irq_errs); +} + +static void slic_get_strings(struct net_device *dev, u32 stringset, u8 *data) +{ + if (stringset == ETH_SS_STATS) { + memcpy(data, slic_stats_strings, sizeof(slic_stats_strings)); + data += sizeof(slic_stats_strings); + } +} + +static void slic_get_drvinfo(struct net_device *dev, + struct ethtool_drvinfo *info) +{ + struct slic_device *sdev = netdev_priv(dev); + + strscpy(info->driver, DRV_NAME, sizeof(info->driver)); + strscpy(info->bus_info, pci_name(sdev->pdev), sizeof(info->bus_info)); +} + +static const struct ethtool_ops slic_ethtool_ops = { + .get_drvinfo = slic_get_drvinfo, + .get_link = ethtool_op_get_link, + .get_strings = slic_get_strings, + .get_ethtool_stats = slic_get_ethtool_stats, + .get_sset_count = slic_get_sset_count, +}; + +static const struct net_device_ops slic_netdev_ops = { + .ndo_open = slic_open, + .ndo_stop = slic_close, + .ndo_start_xmit = slic_xmit, + .ndo_set_mac_address = eth_mac_addr, + .ndo_get_stats64 = slic_get_stats, + .ndo_set_rx_mode = slic_set_rx_mode, + .ndo_validate_addr = eth_validate_addr, +}; + +static u16 slic_eeprom_csum(unsigned char *eeprom, unsigned int len) +{ + unsigned char *ptr = eeprom; + u32 csum = 0; + __le16 data; + + while (len > 1) { + memcpy(&data, ptr, sizeof(data)); + csum += le16_to_cpu(data); + ptr += 2; + len -= 2; + } + if (len > 0) + csum += *(u8 *)ptr; + while (csum >> 16) + csum = (csum & 0xFFFF) + ((csum >> 16) & 0xFFFF); + return ~csum; +} + +/* check eeprom size, magic and checksum */ +static bool slic_eeprom_valid(unsigned char *eeprom, unsigned int size) +{ + const unsigned int MAX_SIZE = 128; + const unsigned int MIN_SIZE = 98; + __le16 magic; + __le16 csum; + + if (size < MIN_SIZE || size > MAX_SIZE) + return false; + memcpy(&magic, eeprom, sizeof(magic)); + if (le16_to_cpu(magic) != SLIC_EEPROM_MAGIC) + return false; + /* cut checksum bytes */ + size -= 2; + memcpy(&csum, eeprom + size, sizeof(csum)); + + return (le16_to_cpu(csum) == slic_eeprom_csum(eeprom, size)); +} + +static int slic_read_eeprom(struct slic_device *sdev) +{ + unsigned int devfn = PCI_FUNC(sdev->pdev->devfn); + struct slic_shmem *sm = &sdev->shmem; + struct slic_shmem_data *sm_data = sm->shmem_data; + const unsigned int MAX_LOOPS = 5000; + unsigned int codesize; + unsigned char *eeprom; + struct slic_upr *upr; + unsigned int i = 0; + dma_addr_t paddr; + int err = 0; + u8 *mac[2]; + + eeprom = dma_alloc_coherent(&sdev->pdev->dev, SLIC_EEPROM_SIZE, + &paddr, GFP_KERNEL); + if (!eeprom) + return -ENOMEM; + + slic_write(sdev, SLIC_REG_ICR, SLIC_ICR_INT_OFF); + /* setup ISP temporarily */ + slic_write(sdev, SLIC_REG_ISP, lower_32_bits(sm->isr_paddr)); + + err = slic_new_upr(sdev, SLIC_UPR_CONFIG, paddr); + if (!err) { + for (i = 0; i < MAX_LOOPS; i++) { + if (le32_to_cpu(sm_data->isr) & SLIC_ISR_UPC) + break; + mdelay(1); + } + if (i == MAX_LOOPS) { + dev_err(&sdev->pdev->dev, + "timed out while waiting for eeprom data\n"); + err = -ETIMEDOUT; + } + upr = slic_dequeue_upr(sdev); + kfree(upr); + } + + slic_write(sdev, SLIC_REG_ISP, 0); + slic_write(sdev, SLIC_REG_ISR, 0); + slic_flush_write(sdev); + + if (err) + goto free_eeprom; + + if (sdev->model == SLIC_MODEL_OASIS) { + struct slic_oasis_eeprom *oee; + + oee = (struct slic_oasis_eeprom *)eeprom; + mac[0] = oee->mac; + mac[1] = oee->mac2; + codesize = le16_to_cpu(oee->eeprom_code_size); + } else { + struct slic_mojave_eeprom *mee; + + mee = (struct slic_mojave_eeprom *)eeprom; + mac[0] = mee->mac; + mac[1] = mee->mac2; + codesize = le16_to_cpu(mee->eeprom_code_size); + } + + if (!slic_eeprom_valid(eeprom, codesize)) { + dev_err(&sdev->pdev->dev, "invalid checksum in eeprom\n"); + err = -EINVAL; + goto free_eeprom; + } + /* set mac address */ + eth_hw_addr_set(sdev->netdev, mac[devfn]); +free_eeprom: + dma_free_coherent(&sdev->pdev->dev, SLIC_EEPROM_SIZE, eeprom, paddr); + + return err; +} + +static int slic_init(struct slic_device *sdev) +{ + int err; + + spin_lock_init(&sdev->upper_lock); + spin_lock_init(&sdev->link_lock); + INIT_LIST_HEAD(&sdev->upr_list.list); + spin_lock_init(&sdev->upr_list.lock); + u64_stats_init(&sdev->stats.syncp); + + slic_card_reset(sdev); + + err = slic_load_firmware(sdev); + if (err) { + dev_err(&sdev->pdev->dev, "failed to load firmware\n"); + return err; + } + + /* we need the shared memory to read EEPROM so set it up temporarily */ + err = slic_init_shmem(sdev); + if (err) { + dev_err(&sdev->pdev->dev, "failed to init shared memory\n"); + return err; + } + + err = slic_read_eeprom(sdev); + if (err) { + dev_err(&sdev->pdev->dev, "failed to read eeprom\n"); + goto free_sm; + } + + slic_card_reset(sdev); + slic_free_shmem(sdev); + + return 0; +free_sm: + slic_free_shmem(sdev); + + return err; +} + +static bool slic_is_fiber(unsigned short subdev) +{ + switch (subdev) { + /* Mojave */ + case PCI_SUBDEVICE_ID_ALACRITECH_1000X1F: + case PCI_SUBDEVICE_ID_ALACRITECH_SES1001F: fallthrough; + /* Oasis */ + case PCI_SUBDEVICE_ID_ALACRITECH_SEN2002XF: + case PCI_SUBDEVICE_ID_ALACRITECH_SEN2001XF: + case PCI_SUBDEVICE_ID_ALACRITECH_SEN2104EF: + case PCI_SUBDEVICE_ID_ALACRITECH_SEN2102EF: + return true; + } + return false; +} + +static void slic_configure_pci(struct pci_dev *pdev) +{ + u16 old; + u16 cmd; + + pci_read_config_word(pdev, PCI_COMMAND, &old); + + cmd = old | PCI_COMMAND_PARITY | PCI_COMMAND_SERR; + if (old != cmd) + pci_write_config_word(pdev, PCI_COMMAND, cmd); +} + +static int slic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + struct slic_device *sdev; + struct net_device *dev; + int err; + + err = pci_enable_device(pdev); + if (err) { + dev_err(&pdev->dev, "failed to enable PCI device\n"); + return err; + } + + pci_set_master(pdev); + pci_try_set_mwi(pdev); + + slic_configure_pci(pdev); + + err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); + if (err) { + dev_err(&pdev->dev, "failed to setup DMA\n"); + goto disable; + } + + dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); + + err = pci_request_regions(pdev, DRV_NAME); + if (err) { + dev_err(&pdev->dev, "failed to obtain PCI regions\n"); + goto disable; + } + + dev = alloc_etherdev(sizeof(*sdev)); + if (!dev) { + dev_err(&pdev->dev, "failed to alloc ethernet device\n"); + err = -ENOMEM; + goto free_regions; + } + + SET_NETDEV_DEV(dev, &pdev->dev); + pci_set_drvdata(pdev, dev); + dev->irq = pdev->irq; + dev->netdev_ops = &slic_netdev_ops; + dev->hw_features = NETIF_F_RXCSUM; + dev->features |= dev->hw_features; + + dev->ethtool_ops = &slic_ethtool_ops; + + sdev = netdev_priv(dev); + sdev->model = (pdev->device == PCI_DEVICE_ID_ALACRITECH_OASIS) ? + SLIC_MODEL_OASIS : SLIC_MODEL_MOJAVE; + sdev->is_fiber = slic_is_fiber(pdev->subsystem_device); + sdev->pdev = pdev; + sdev->netdev = dev; + sdev->regs = ioremap(pci_resource_start(pdev, 0), + pci_resource_len(pdev, 0)); + if (!sdev->regs) { + dev_err(&pdev->dev, "failed to map registers\n"); + err = -ENOMEM; + goto free_netdev; + } + + err = slic_init(sdev); + if (err) { + dev_err(&pdev->dev, "failed to initialize driver\n"); + goto unmap; + } + + netif_napi_add(dev, &sdev->napi, slic_poll); + netif_carrier_off(dev); + + err = register_netdev(dev); + if (err) { + dev_err(&pdev->dev, "failed to register net device: %i\n", err); + goto unmap; + } + + return 0; + +unmap: + iounmap(sdev->regs); +free_netdev: + free_netdev(dev); +free_regions: + pci_release_regions(pdev); +disable: + pci_disable_device(pdev); + + return err; +} + +static void slic_remove(struct pci_dev *pdev) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct slic_device *sdev = netdev_priv(dev); + + unregister_netdev(dev); + iounmap(sdev->regs); + free_netdev(dev); + pci_release_regions(pdev); + pci_disable_device(pdev); +} + +static struct pci_driver slic_driver = { + .name = DRV_NAME, + .id_table = slic_id_tbl, + .probe = slic_probe, + .remove = slic_remove, +}; + +module_pci_driver(slic_driver); + +MODULE_DESCRIPTION("Alacritech non-accelerated SLIC driver"); +MODULE_AUTHOR("Lino Sanfilippo <LinoSanfilippo@gmx.de>"); +MODULE_LICENSE("GPL"); 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