This patch adds network driver for APM X-Gene SoC ethernet. Signed-off-by: Iyappan Subramanian <isubramanian@xxxxxxx> Signed-off-by: Ravi Patel <rapatel@xxxxxxx> Signed-off-by: Keyur Chudgar <kchudgar@xxxxxxx> --- drivers/net/ethernet/Kconfig | 1 + drivers/net/ethernet/Makefile | 1 + drivers/net/ethernet/apm/Kconfig | 1 + drivers/net/ethernet/apm/Makefile | 5 + drivers/net/ethernet/apm/xgene/Kconfig | 9 + drivers/net/ethernet/apm/xgene/Makefile | 6 + drivers/net/ethernet/apm/xgene/xgene_enet_hw.c | 807 +++++++++++++++++++ drivers/net/ethernet/apm/xgene/xgene_enet_hw.h | 353 ++++++++ drivers/net/ethernet/apm/xgene/xgene_enet_main.c | 936 ++++++++++++++++++++++ drivers/net/ethernet/apm/xgene/xgene_enet_main.h | 131 +++ 10 files changed, 2250 insertions(+) create mode 100644 drivers/net/ethernet/apm/Kconfig create mode 100644 drivers/net/ethernet/apm/Makefile create mode 100644 drivers/net/ethernet/apm/xgene/Kconfig create mode 100644 drivers/net/ethernet/apm/xgene/Makefile create mode 100644 drivers/net/ethernet/apm/xgene/xgene_enet_hw.c create mode 100644 drivers/net/ethernet/apm/xgene/xgene_enet_hw.h create mode 100644 drivers/net/ethernet/apm/xgene/xgene_enet_main.c create mode 100644 drivers/net/ethernet/apm/xgene/xgene_enet_main.h diff --git a/drivers/net/ethernet/Kconfig b/drivers/net/ethernet/Kconfig index 39b26fe..871a438 100644 --- a/drivers/net/ethernet/Kconfig +++ b/drivers/net/ethernet/Kconfig @@ -24,6 +24,7 @@ source "drivers/net/ethernet/allwinner/Kconfig" source "drivers/net/ethernet/alteon/Kconfig" source "drivers/net/ethernet/altera/Kconfig" source "drivers/net/ethernet/amd/Kconfig" +source "drivers/net/ethernet/apm/Kconfig" source "drivers/net/ethernet/apple/Kconfig" source "drivers/net/ethernet/arc/Kconfig" source "drivers/net/ethernet/atheros/Kconfig" diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile index 545d0b3..291df52 100644 --- a/drivers/net/ethernet/Makefile +++ b/drivers/net/ethernet/Makefile @@ -10,6 +10,7 @@ obj-$(CONFIG_NET_VENDOR_ALLWINNER) += allwinner/ obj-$(CONFIG_NET_VENDOR_ALTEON) += alteon/ obj-$(CONFIG_ALTERA_TSE) += altera/ obj-$(CONFIG_NET_VENDOR_AMD) += amd/ +obj-$(CONFIG_NET_XGENE) += apm/ obj-$(CONFIG_NET_VENDOR_APPLE) += apple/ obj-$(CONFIG_NET_VENDOR_ARC) += arc/ obj-$(CONFIG_NET_VENDOR_ATHEROS) += atheros/ diff --git a/drivers/net/ethernet/apm/Kconfig b/drivers/net/ethernet/apm/Kconfig new file mode 100644 index 0000000..ec63d70 --- /dev/null +++ b/drivers/net/ethernet/apm/Kconfig @@ -0,0 +1 @@ +source "drivers/net/ethernet/apm/xgene/Kconfig" diff --git a/drivers/net/ethernet/apm/Makefile b/drivers/net/ethernet/apm/Makefile new file mode 100644 index 0000000..65ce32a --- /dev/null +++ b/drivers/net/ethernet/apm/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for APM X-GENE Ethernet driver. +# + +obj-$(CONFIG_NET_XGENE) += xgene/ diff --git a/drivers/net/ethernet/apm/xgene/Kconfig b/drivers/net/ethernet/apm/xgene/Kconfig new file mode 100644 index 0000000..616dff6 --- /dev/null +++ b/drivers/net/ethernet/apm/xgene/Kconfig @@ -0,0 +1,9 @@ +config NET_XGENE + tristate "APM X-Gene SoC Ethernet Driver" + select PHYLIB + help + This is the Ethernet driver for the on-chip ethernet interface on the + APM X-Gene SoC. + + To compile this driver as a module, choose M here. This module will + be called xgene_enet. diff --git a/drivers/net/ethernet/apm/xgene/Makefile b/drivers/net/ethernet/apm/xgene/Makefile new file mode 100644 index 0000000..60de5fa --- /dev/null +++ b/drivers/net/ethernet/apm/xgene/Makefile @@ -0,0 +1,6 @@ +# +# Makefile for APM X-Gene Ethernet Driver. +# + +xgene-enet-objs := xgene_enet_hw.o xgene_enet_main.o +obj-$(CONFIG_NET_XGENE) += xgene-enet.o diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c new file mode 100644 index 0000000..421a841 --- /dev/null +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c @@ -0,0 +1,807 @@ +/* Applied Micro X-Gene SoC Ethernet Driver + * + * Copyright (c) 2014, Applied Micro Circuits Corporation + * Authors: Iyappan Subramanian <isubramanian@xxxxxxx> + * Ravi Patel <rapatel@xxxxxxx> + * Keyur Chudgar <kchudgar@xxxxxxx> + * + * 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, or (at your + * option) any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include "xgene_enet_main.h" +#include "xgene_enet_hw.h" + +struct xgene_enet_desc_info desc_info[MAX_DESC_INFO_INDEX] = { + [USERINFO] = {0, USERINFO_POS, USERINFO_LEN}, + [FPQNUM] = {0, FPQNUM_POS, FPQNUM_LEN}, + [STASH] = {0, STASH_POS, STASH_LEN}, + [DATAADDR] = {1, DATAADDR_POS, DATAADDR_LEN}, + [BUFDATALEN] = {1, BUFDATALEN_POS, BUFDATALEN_LEN}, + [BUFLEN] = {1, BUFLEN_POS, BUFLEN_LEN}, + [COHERENT] = {1, COHERENT_POS, COHERENT_LEN}, + [TCPHDR] = {3, TCPHDR_POS, TCPHDR_LEN}, + [IPHDR] = {3, IPHDR_POS, IPHDR_LEN}, + [ETHHDR] = {3, ETHHDR_POS, ETHHDR_LEN}, + [EC] = {3, EC_POS, EC_LEN}, + [IS] = {3, IS_POS, IS_LEN}, + [IC] = {3, IC_POS, IC_LEN}, + [TYPESEL] = {3, TYPESEL_POS, TYPESEL_LEN}, + [HENQNUM] = {3, HENQNUM_POS, HENQNUM_LEN}, +}; + +void set_desc(void *desc_ptr, enum desc_info_index index, u64 val) +{ + u64 *desc; + u8 i, start_bit, len; + u64 mask; + + desc = desc_ptr; + i = desc_info[index].word_index; + start_bit = desc_info[index].start_bit; + len = desc_info[index].len; + mask = GENMASK_ULL((start_bit + len - 1), start_bit); + desc[i] = (desc[i] & ~mask) | ((val << start_bit) & mask); +} + +u64 get_desc(void *desc_ptr, enum desc_info_index index) +{ + u64 *desc; + u8 i, start_bit, len; + u64 mask; + + desc = desc_ptr; + i = desc_info[index].word_index; + start_bit = desc_info[index].start_bit; + len = desc_info[index].len; + mask = GENMASK_ULL((start_bit + len - 1), start_bit); + + return (desc[i] & mask) >> start_bit; +} + +static void xgene_enet_ring_init(struct xgene_enet_desc_ring *ring) +{ + u32 *ring_cfg = ring->state; + u64 addr = ring->dma; + enum xgene_enet_ring_cfgsize cfgsize = ring->cfgsize; + + ring_cfg[4] |= (1 << SELTHRSH_POS) & + CREATE_MASK(SELTHRSH_POS, SELTHRSH_LEN); + ring_cfg[3] |= ACCEPTLERR; + ring_cfg[2] |= QCOHERENT; + + addr >>= 8; + ring_cfg[2] |= (addr << RINGADDRL_POS) & + CREATE_MASK_ULL(RINGADDRL_POS, RINGADDRL_LEN); + addr >>= RINGADDRL_LEN; + ring_cfg[3] |= addr & CREATE_MASK_ULL(RINGADDRH_POS, RINGADDRH_LEN); + ring_cfg[3] |= ((u32) cfgsize << RINGSIZE_POS) & + CREATE_MASK(RINGSIZE_POS, RINGSIZE_LEN); +} + +static void xgene_enet_ring_set_type(struct xgene_enet_desc_ring *ring) +{ + u32 *ring_cfg = ring->state; + bool is_bufpool = IS_FP(ring->id); + u32 val; + + val = (is_bufpool) ? RING_BUFPOOL : RING_REGULAR; + ring_cfg[4] |= (val << RINGTYPE_POS) & + CREATE_MASK(RINGTYPE_POS, RINGTYPE_LEN); + + if (is_bufpool) { + ring_cfg[3] |= (BUFPOOL_MODE << RINGMODE_POS) & + CREATE_MASK(RINGMODE_POS, RINGMODE_LEN); + } +} + +static void xgene_enet_ring_set_recombbuf(struct xgene_enet_desc_ring *ring) +{ + u32 *ring_cfg = ring->state; + + ring_cfg[3] |= RECOMBBUF; + ring_cfg[3] |= (0xf << RECOMTIMEOUTL_POS) & + CREATE_MASK(RECOMTIMEOUTL_POS, RECOMTIMEOUTL_LEN); + ring_cfg[4] |= 0x7 & CREATE_MASK(RECOMTIMEOUTH_POS, RECOMTIMEOUTH_LEN); +} + +static void xgene_enet_ring_wr32(struct xgene_enet_desc_ring *ring, + u32 offset, u32 data) +{ + struct xgene_enet_pdata *pdata = netdev_priv(ring->ndev); + + iowrite32(data, pdata->ring_csr_addr + offset); +} + +static void xgene_enet_ring_rd32(struct xgene_enet_desc_ring *ring, + u32 offset, u32 *data) +{ + struct xgene_enet_pdata *pdata = netdev_priv(ring->ndev); + + *data = ioread32(pdata->ring_csr_addr + offset); +} + +static void xgene_enet_write_ring_state(struct xgene_enet_desc_ring *ring) +{ + int i; + + xgene_enet_ring_wr32(ring, CSR_RING_CONFIG, ring->num); + for (i = 0; i < NUM_RING_CONFIG; i++) { + xgene_enet_ring_wr32(ring, CSR_RING_WR_BASE + (i * 4), + ring->state[i]); + } +} + +static void xgene_enet_clr_ring_state(struct xgene_enet_desc_ring *ring) +{ + memset(ring->state, 0, sizeof(u32) * NUM_RING_CONFIG); + xgene_enet_write_ring_state(ring); +} + +static void xgene_enet_set_ring_state(struct xgene_enet_desc_ring *ring) +{ + xgene_enet_ring_set_type(ring); + + if (RING_OWNER(ring) == RING_OWNER_ETH0) + xgene_enet_ring_set_recombbuf(ring); + + xgene_enet_ring_init(ring); + xgene_enet_write_ring_state(ring); +} + +static void xgene_enet_set_ring_id(struct xgene_enet_desc_ring *ring) +{ + u32 ring_id_val, ring_id_buf; + bool is_bufpool; + + is_bufpool = IS_FP(ring->id); + + ring_id_val = ring->id & GENMASK(9, 0); + ring_id_val |= OVERWRITE; + + ring_id_buf = (ring->num << 9) & GENMASK(18, 9); + ring_id_buf |= PREFETCH_BUF_EN; + if (is_bufpool) + ring_id_buf |= IS_BUFFER_POOL; + + xgene_enet_ring_wr32(ring, CSR_RING_ID, ring_id_val); + xgene_enet_ring_wr32(ring, CSR_RING_ID_BUF, ring_id_buf); +} + +static void xgene_enet_clr_desc_ring_id(struct xgene_enet_desc_ring *ring) +{ + u32 ring_id; + + ring_id = ring->id | OVERWRITE; + xgene_enet_ring_wr32(ring, CSR_RING_ID, ring_id); + xgene_enet_ring_wr32(ring, CSR_RING_ID_BUF, 0); +} + +struct xgene_enet_desc_ring *xgene_enet_setup_ring( + struct xgene_enet_desc_ring *ring) +{ + u32 size = ring->size; + u32 i, data; + u64 *desc; + + xgene_enet_clr_ring_state(ring); + xgene_enet_set_ring_state(ring); + xgene_enet_set_ring_id(ring); + + ring->slots = IS_FP(ring->id) ? size / 16 : size / 32; + + if (IS_FP(ring->id) || RING_OWNER(ring) != RING_OWNER_CPU) + goto out; + + for (i = 0; i < ring->slots; i++) { + desc = (u64 *)&ring->desc[i]; + desc[EMPTY_SLOT_INDEX] = EMPTY_SLOT; + } + + xgene_enet_ring_rd32(ring, CSR_RING_NE_INT_MODE, &data); + data |= (1 << (31 - RING_BUFNUM(ring))); + xgene_enet_ring_wr32(ring, CSR_RING_NE_INT_MODE, data); + +out: + return ring; +} + +void xgene_enet_clear_ring(struct xgene_enet_desc_ring *ring) +{ + u32 data; + + if (IS_FP(ring->id) || RING_OWNER(ring) != RING_OWNER_CPU) + goto out; + + xgene_enet_ring_rd32(ring, CSR_RING_NE_INT_MODE, &data); + data &= ~(u32) (1 << (31 - RING_BUFNUM(ring))); + xgene_enet_ring_wr32(ring, CSR_RING_NE_INT_MODE, data); + +out: + xgene_enet_clr_desc_ring_id(ring); + xgene_enet_clr_ring_state(ring); +} + +static void xgene_enet_wr_csr(struct xgene_enet_pdata *pdata, + u32 offset, u32 val) +{ + void *addr = pdata->eth_csr_addr + offset; + + iowrite32(val, addr); +} + +static void xgene_enet_wr_ring_if(struct xgene_enet_pdata *pdata, + u32 offset, u32 val) +{ + void *addr = pdata->eth_ring_if_addr + offset; + + iowrite32(val, addr); +} + +static void xgene_enet_wr_diag_csr(struct xgene_enet_pdata *pdata, + u32 offset, u32 val) +{ + void *addr = pdata->eth_diag_csr_addr + offset; + + iowrite32(val, addr); +} + +static void xgene_enet_wr_mcx_csr(struct xgene_enet_pdata *pdata, + u32 offset, u32 val) +{ + void *addr = pdata->mcx_mac_csr_addr + offset; + + iowrite32(val, addr); +} + +static u32 xgene_enet_wr_indirect(void *addr, void *wr, void *cmd, + void *cmd_done, u32 wr_addr, u32 wr_data) +{ + u32 cmd_done_val; + + iowrite32(wr_addr, addr); + iowrite32(wr_data, wr); + iowrite32(XGENE_ENET_WR_CMD, cmd); + udelay(5); /* wait 5 us for completion */ + cmd_done_val = ioread32(cmd_done); + iowrite32(0, cmd); + return cmd_done_val; +} + +static void xgene_enet_wr_mcx_mac(struct xgene_enet_pdata *pdata, + u32 wr_addr, u32 wr_data) +{ + void *addr, *wr, *cmd, *cmd_done; + int ret; + + addr = pdata->mcx_mac_addr + MAC_ADDR_REG_OFFSET; + wr = pdata->mcx_mac_addr + MAC_WRITE_REG_OFFSET; + cmd = pdata->mcx_mac_addr + MAC_COMMAND_REG_OFFSET; + cmd_done = pdata->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET; + + ret = xgene_enet_wr_indirect(addr, wr, cmd, cmd_done, wr_addr, wr_data); + if (!ret) + netdev_err(pdata->ndev, "MCX mac write failed, addr: %04x\n", + wr_addr); +} + +static void xgene_enet_rd_csr(struct xgene_enet_pdata *pdata, + u32 offset, u32 *val) +{ + void *addr = pdata->eth_csr_addr + offset; + + *val = ioread32(addr); +} + +static void xgene_enet_rd_diag_csr(struct xgene_enet_pdata *pdata, + u32 offset, u32 *val) +{ + void *addr = pdata->eth_diag_csr_addr + offset; + + *val = ioread32(addr); +} + +static void xgene_enet_rd_mcx_csr(struct xgene_enet_pdata *pdata, + u32 offset, u32 *val) +{ + void *addr = pdata->mcx_mac_csr_addr + offset; + + *val = ioread32(addr); +} + +static u32 xgene_enet_rd_indirect(void *addr, void *rd, void *cmd, + void *cmd_done, u32 rd_addr, u32 *rd_data) +{ + u32 cmd_done_val; + + iowrite32(rd_addr, addr); + iowrite32(XGENE_ENET_RD_CMD, cmd); + udelay(5); /* wait 5 us for completion */ + cmd_done_val = ioread32(cmd_done); + *rd_data = ioread32(rd); + iowrite32(0, cmd); + + return cmd_done_val; +} + +static void xgene_enet_rd_mcx_mac(struct xgene_enet_pdata *pdata, + u32 rd_addr, u32 *rd_data) +{ + void *addr, *rd, *cmd, *cmd_done; + int ret; + + addr = pdata->mcx_mac_addr + MAC_ADDR_REG_OFFSET; + rd = pdata->mcx_mac_addr + MAC_READ_REG_OFFSET; + cmd = pdata->mcx_mac_addr + MAC_COMMAND_REG_OFFSET; + cmd_done = pdata->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET; + + ret = xgene_enet_rd_indirect(addr, rd, cmd, cmd_done, rd_addr, rd_data); + if (!ret) + netdev_err(pdata->ndev, "MCX mac read failed, addr: %04x\n", + rd_addr); +} + +static void xgene_enet_rd_mcx_stats(struct xgene_enet_pdata *pdata, + u32 rd_addr, u32 *rd_data) +{ + void *addr, *rd, *cmd, *cmd_done; + int ret; + + addr = pdata->mcx_stats_addr + STAT_ADDR_REG_OFFSET; + rd = pdata->mcx_stats_addr + STAT_READ_REG_OFFSET; + cmd = pdata->mcx_stats_addr + STAT_COMMAND_REG_OFFSET; + cmd_done = pdata->mcx_stats_addr + STAT_COMMAND_DONE_REG_OFFSET; + + ret = xgene_enet_rd_indirect(addr, rd, cmd, cmd_done, rd_addr, rd_data); + if (!ret) + netdev_err(pdata->ndev, "MCX stats read failed, addr: %04x\n", + rd_addr); +} + +void xgene_genericmiiphy_write(struct xgene_enet_pdata *pdata, int phy_id, + u32 reg, u16 data) +{ + u32 addr = 0, wr_data = 0, done; + + PHY_ADDR_SET(&addr, phy_id); + REG_ADDR_SET(&addr, reg); + xgene_enet_wr_mcx_mac(pdata, MII_MGMT_ADDRESS_ADDR, addr); + + PHY_CONTROL_SET(&wr_data, data); + xgene_enet_wr_mcx_mac(pdata, MII_MGMT_CONTROL_ADDR, wr_data); + + usleep_range(20, 30); /* wait 20 us for completion */ + xgene_enet_rd_mcx_mac(pdata, MII_MGMT_INDICATORS_ADDR, &done); + if (done & BUSY_MASK) + netdev_err(pdata->ndev, "MII_MGMT write failed\n"); +} + +void xgene_genericmiiphy_read(struct xgene_enet_pdata *pdata, u8 phy_id, + u32 reg, u32 *data) +{ + u32 addr = 0, done; + + PHY_ADDR_SET(&addr, phy_id); + REG_ADDR_SET(&addr, reg); + xgene_enet_wr_mcx_mac(pdata, MII_MGMT_ADDRESS_ADDR, addr); + xgene_enet_wr_mcx_mac(pdata, MII_MGMT_COMMAND_ADDR, READ_CYCLE_MASK); + + usleep_range(20, 30); /* wait 20 us for completion */ + xgene_enet_rd_mcx_mac(pdata, MII_MGMT_INDICATORS_ADDR, &done); + if (done & BUSY_MASK) + netdev_err(pdata->ndev, "MII_MGMT read failed\n"); + + xgene_enet_rd_mcx_mac(pdata, MII_MGMT_STATUS_ADDR, data); + xgene_enet_wr_mcx_mac(pdata, MII_MGMT_COMMAND_ADDR, 0); +} + +void xgene_gmac_set_mac_addr(struct xgene_enet_pdata *pdata) +{ + u32 addr0, addr1; + u8 *dev_addr = pdata->ndev->dev_addr; + + addr0 = (dev_addr[3] << 24) | (dev_addr[2] << 16) | + (dev_addr[1] << 8) | dev_addr[0]; + addr1 = (dev_addr[5] << 24) | (dev_addr[4] << 16); + addr1 |= pdata->phy_addr & 0xFFFF; + + xgene_enet_wr_mcx_mac(pdata, STATION_ADDR0_ADDR, addr0); + xgene_enet_wr_mcx_mac(pdata, STATION_ADDR1_ADDR, addr1); +} + +static int xgene_enet_ecc_init(struct xgene_enet_pdata *pdata) +{ + struct net_device *ndev = pdata->ndev; + u32 data; + + xgene_enet_wr_diag_csr(pdata, ENET_CFG_MEM_RAM_SHUTDOWN_ADDR, 0x0); + usleep_range(1000, 1100); /* wait 1 ms for completion */ + xgene_enet_rd_diag_csr(pdata, ENET_BLOCK_MEM_RDY_ADDR, &data); + if (data != 0xffffffff) { + netdev_err(ndev, "Failed to release memory from shutdown\n"); + return -ENODEV; + } + + return 0; +} + +static void xgene_gmac_phy_enable_scan_cycle(struct xgene_enet_pdata *pdata, + int enable) +{ + u32 val; + + xgene_enet_rd_mcx_mac(pdata, MII_MGMT_COMMAND_ADDR, &val); + SCAN_CYCLE_MASK_SET(&val, enable); + xgene_enet_wr_mcx_mac(pdata, MII_MGMT_COMMAND_ADDR, val); + + /* Program phy address start scan from 0 and register at address 0x1 */ + xgene_enet_rd_mcx_mac(pdata, MII_MGMT_ADDRESS_ADDR, &val); + PHY_ADDR_SET(&val, 0); + REG_ADDR_SET(&val, 1); + xgene_enet_wr_mcx_mac(pdata, MII_MGMT_ADDRESS_ADDR, val); +} + +void xgene_gmac_reset(struct xgene_enet_pdata *pdata) +{ + xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, SOFT_RESET1); + xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, 0); +} + +void xgene_gmac_init(struct xgene_enet_pdata *pdata, int speed) +{ + u32 value, mc2; + u32 intf_ctl, rgmii; + u32 icm0, icm2; + + xgene_gmac_reset(pdata); + + xgene_enet_rd_mcx_csr(pdata, ICM_CONFIG0_REG_0_ADDR, &icm0); + xgene_enet_rd_mcx_csr(pdata, ICM_CONFIG2_REG_0_ADDR, &icm2); + xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_2_ADDR, &mc2); + xgene_enet_rd_mcx_mac(pdata, INTERFACE_CONTROL_ADDR, &intf_ctl); + xgene_enet_rd_csr(pdata, RGMII_REG_0_ADDR, &rgmii); + + switch (speed) { + case SPEED_10: + ENET_INTERFACE_MODE2_SET(&mc2, 1); + CFG_MACMODE_SET(&icm0, 0); + CFG_WAITASYNCRD_SET(&icm2, 500); + rgmii &= ~CFG_SPEED_1250; + break; + case SPEED_100: + ENET_INTERFACE_MODE2_SET(&mc2, 1); + intf_ctl |= ENET_LHD_MODE; + CFG_MACMODE_SET(&icm0, 1); + CFG_WAITASYNCRD_SET(&icm2, 80); + rgmii &= ~CFG_SPEED_1250; + break; + default: + ENET_INTERFACE_MODE2_SET(&mc2, 2); + intf_ctl |= ENET_GHD_MODE; + CFG_TXCLK_MUXSEL0_SET(&rgmii, 4); + xgene_enet_rd_csr(pdata, DEBUG_REG_ADDR, &value); + value |= CFG_BYPASS_UNISEC_TX | CFG_BYPASS_UNISEC_RX; + xgene_enet_wr_csr(pdata, DEBUG_REG_ADDR, value); + break; + } + + mc2 |= FULL_DUPLEX2; + xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_2_ADDR, mc2); + xgene_enet_wr_mcx_mac(pdata, INTERFACE_CONTROL_ADDR, intf_ctl); + + xgene_gmac_set_mac_addr(pdata); + + /* Adjust MDC clock frequency */ + xgene_enet_rd_mcx_mac(pdata, MII_MGMT_CONFIG_ADDR, &value); + MGMT_CLOCK_SEL_SET(&value, 7); + xgene_enet_wr_mcx_mac(pdata, MII_MGMT_CONFIG_ADDR, value); + + /* Enable drop if bufpool not available */ + xgene_enet_rd_csr(pdata, RSIF_CONFIG_REG_ADDR, &value); + value |= CFG_RSIF_FPBUFF_TIMEOUT_EN; + xgene_enet_wr_csr(pdata, RSIF_CONFIG_REG_ADDR, value); + + /* Rtype should be copied from FP */ + xgene_enet_wr_csr(pdata, RSIF_RAM_DBG_REG0_ADDR, 0); + xgene_enet_wr_csr(pdata, RGMII_REG_0_ADDR, rgmii); + + /* Rx-Tx traffic resume */ + xgene_enet_wr_csr(pdata, CFG_LINK_AGGR_RESUME_0_ADDR, TX_PORT0); + + xgene_enet_wr_mcx_csr(pdata, ICM_CONFIG0_REG_0_ADDR, icm0); + xgene_enet_wr_mcx_csr(pdata, ICM_CONFIG2_REG_0_ADDR, icm2); + + xgene_enet_rd_mcx_csr(pdata, RX_DV_GATE_REG_0_ADDR, &value); + value &= ~TX_DV_GATE_EN0; + value &= ~RX_DV_GATE_EN0; + value |= RESUME_RX0; + xgene_enet_wr_mcx_csr(pdata, RX_DV_GATE_REG_0_ADDR, value); + + xgene_enet_wr_csr(pdata, CFG_BYPASS_ADDR, RESUME_TX); +} + +/* Start Statistics related functions */ +static void xgene_gmac_get_rx_stats(struct xgene_enet_pdata *pdata, + struct xgene_enet_rx_stats *rx_stat) +{ + xgene_enet_rd_mcx_stats(pdata, RBYT_ADDR, &rx_stat->byte_cntr); + xgene_enet_rd_mcx_stats(pdata, RPKT_ADDR, &rx_stat->pkt_cntr); + xgene_enet_rd_mcx_stats(pdata, RDRP_ADDR, &rx_stat->dropped_pkt_cntr); + xgene_enet_rd_mcx_stats(pdata, RFCS_ADDR, &rx_stat->fcs_error_cntr); + xgene_enet_rd_mcx_stats(pdata, RFLR_ADDR, &rx_stat->frm_len_err_cntr); + xgene_enet_rd_mcx_stats(pdata, RALN_ADDR, &rx_stat->align_err_cntr); + xgene_enet_rd_mcx_stats(pdata, ROVR_ADDR, &rx_stat->oversize_pkt_cntr); + xgene_enet_rd_mcx_stats(pdata, RUND_ADDR, &rx_stat->undersize_pkt_cntr); +} + +static void xgene_gmac_get_tx_stats(struct xgene_enet_pdata *pdata, + struct xgene_enet_tx_stats *tx_stats) +{ + xgene_enet_rd_mcx_stats(pdata, TBYT_ADDR, &tx_stats->byte_cntr); + xgene_enet_rd_mcx_stats(pdata, TPKT_ADDR, &tx_stats->pkt_cntr); + xgene_enet_rd_mcx_stats(pdata, TDRP_ADDR, &tx_stats->drop_frame_cntr); + xgene_enet_rd_mcx_stats(pdata, TFCS_ADDR, &tx_stats->fcs_error_cntr); + xgene_enet_rd_mcx_stats(pdata, TUND_ADDR, + &tx_stats->undersize_frame_cntr); +} + +void xgene_gmac_get_stats(struct xgene_enet_pdata *pdata, + struct xgene_enet_stats *stats) +{ + xgene_gmac_get_rx_stats(pdata, &stats->rx_stats); + xgene_gmac_get_tx_stats(pdata, &stats->tx_stats); +} + +static void xgene_enet_config_ring_if_assoc(struct xgene_enet_pdata *pdata) +{ + u32 val = 0xffffffff; + + xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIWQASSOC_ADDR, val); + xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIFPQASSOC_ADDR, val); + xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIQMLITEWQASSOC_ADDR, val); + xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIQMLITEFPQASSOC_ADDR, val); +} + +void xgene_enet_cle_bypass(struct xgene_enet_pdata *pdata, + u32 dst_ring_num, u32 fpsel, u32 nxtfpsel) +{ + u32 cb; + + xgene_enet_rd_csr(pdata, CLE_BYPASS_REG0_0_ADDR, &cb); + cb |= CFG_CLE_BYPASS_EN0; + CFG_CLE_IP_PROTOCOL0_SET(&cb, 3); + xgene_enet_wr_csr(pdata, CLE_BYPASS_REG0_0_ADDR, cb); + + xgene_enet_rd_csr(pdata, CLE_BYPASS_REG1_0_ADDR, &cb); + CFG_CLE_DSTQID0_SET(&cb, dst_ring_num); + CFG_CLE_FPSEL0_SET(&cb, fpsel); + xgene_enet_wr_csr(pdata, CLE_BYPASS_REG1_0_ADDR, cb); +} + +void xgene_gmac_rx_enable(struct xgene_enet_pdata *pdata) +{ + u32 data; + + xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data); + xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data | RX_EN); +} + +void xgene_gmac_tx_enable(struct xgene_enet_pdata *pdata) +{ + u32 data; + + xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data); + xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data | TX_EN); +} + +void xgene_gmac_rx_disable(struct xgene_enet_pdata *pdata) +{ + u32 data; + + xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data); + xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data & ~RX_EN); +} + +void xgene_gmac_tx_disable(struct xgene_enet_pdata *pdata) +{ + u32 data; + + xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data); + xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data & ~TX_EN); +} + +void xgene_enet_reset(struct xgene_enet_pdata *pdata) +{ + u32 val; + + clk_prepare_enable(pdata->clk); + clk_disable_unprepare(pdata->clk); + clk_prepare_enable(pdata->clk); + xgene_enet_ecc_init(pdata); + xgene_enet_config_ring_if_assoc(pdata); + + /* Enable auto-incr for scanning */ + xgene_enet_rd_mcx_mac(pdata, MII_MGMT_CONFIG_ADDR, &val); + val |= SCAN_AUTO_INCR; + MGMT_CLOCK_SEL_SET(&val, 1); + xgene_enet_wr_mcx_mac(pdata, MII_MGMT_CONFIG_ADDR, val); + xgene_gmac_phy_enable_scan_cycle(pdata, 1); +} + +void xgene_gport_shutdown(struct xgene_enet_pdata *pdata) +{ + clk_disable_unprepare(pdata->clk); +} + +static int xgene_enet_mdio_read(struct mii_bus *bus, int mii_id, int regnum) +{ + struct xgene_enet_pdata *pdata = bus->priv; + u32 val; + + xgene_genericmiiphy_read(pdata, mii_id, regnum, &val); + netdev_dbg(pdata->ndev, "mdio_rd: bus=%d reg=%d val=%x\n", + mii_id, regnum, val); + + return val; +} + +static int xgene_enet_mdio_write(struct mii_bus *bus, int mii_id, int regnum, + u16 val) +{ + struct xgene_enet_pdata *pdata = bus->priv; + + netdev_dbg(pdata->ndev, "mdio_wr: bus=%d reg=%d val=%x\n", + mii_id, regnum, val); + xgene_genericmiiphy_write(pdata, mii_id, regnum, val); + + return 0; +} + +static void xgene_enet_adjust_link(struct net_device *ndev) +{ + struct xgene_enet_pdata *pdata = netdev_priv(ndev); + struct phy_device *phydev = pdata->phy_dev; + bool status_change = false; + + if (phydev->link && pdata->phy_speed != phydev->speed) { + xgene_gmac_init(pdata, phydev->speed); + pdata->phy_speed = phydev->speed; + status_change = true; + } + + if (pdata->phy_link != phydev->link) { + if (!phydev->link) + pdata->phy_speed = 0; + pdata->phy_link = phydev->link; + status_change = true; + } + + if (!status_change) + goto out; + + if (phydev->link) { + xgene_gmac_rx_enable(pdata); + xgene_gmac_tx_enable(pdata); + } else { + xgene_gmac_rx_disable(pdata); + xgene_gmac_tx_disable(pdata); + } + phy_print_status(phydev); +out: + return; +} + +static int xgene_enet_phy_connect(struct net_device *ndev) +{ + struct xgene_enet_pdata *pdata = netdev_priv(ndev); + struct device_node *phy_np; + struct phy_device *phy_dev; + int ret = 0; + + struct device *dev = &pdata->pdev->dev; + + phy_np = of_parse_phandle(dev->of_node, "phy-handle", 0); + + if (!phy_np) { + netdev_dbg(ndev, "No phy-handle found\n"); + ret = -ENODEV; + } + + phy_dev = of_phy_connect(ndev, phy_np, &xgene_enet_adjust_link, + 0, pdata->phy_mode); + if (!phy_dev) { + netdev_err(ndev, "Could not connect to PHY\n"); + ret = -ENODEV; + goto out; + } + +out: + pdata->phy_link = 0; + pdata->phy_speed = 0; + pdata->phy_dev = phy_dev; + + return ret; +} + +int xgene_enet_mdio_config(struct xgene_enet_pdata *pdata) +{ + struct net_device *ndev = pdata->ndev; + struct device *dev = &pdata->pdev->dev; + struct device_node *child_np = NULL; + struct device_node *mdio_np = NULL; + struct mii_bus *mdio_bus = NULL; + int ret; + + for_each_child_of_node(dev->of_node, child_np) { + if (of_device_is_compatible(child_np, "apm,xgene-mdio")) { + mdio_np = child_np; + break; + } + } + + if (!mdio_np) { + netdev_dbg(ndev, "No mdio node in the dts\n"); + ret = -1; + goto err; + } + + mdio_bus = mdiobus_alloc(); + if (!mdio_bus) { + ret = -ENOMEM; + goto err; + } + + mdio_bus->name = "APM X-Gene MDIO bus"; + mdio_bus->read = xgene_enet_mdio_read; + mdio_bus->write = xgene_enet_mdio_write; + snprintf(mdio_bus->id, MII_BUS_ID_SIZE, "%s", "xgene-enet-mii"); + + mdio_bus->irq = devm_kcalloc(dev, PHY_MAX_ADDR, sizeof(int), + GFP_KERNEL); + if (mdio_bus->irq == NULL) { + ret = -ENOMEM; + goto err; + } + + mdio_bus->priv = pdata; + mdio_bus->parent = &ndev->dev; + + ret = of_mdiobus_register(mdio_bus, mdio_np); + if (ret) { + netdev_err(ndev, "Failed to register MDIO bus\n"); + goto err; + } + pdata->mdio_bus = mdio_bus; + ret = xgene_enet_phy_connect(ndev); + + return ret; +err: + if (mdio_bus) { + if (mdio_bus->irq) + devm_kfree(dev, mdio_bus->irq); + mdiobus_free(mdio_bus); + } + return ret; +} + +int xgene_enet_mdio_remove(struct xgene_enet_pdata *pdata) +{ + struct mii_bus *mdio_bus; + + mdio_bus = pdata->mdio_bus; + mdiobus_unregister(mdio_bus); + mdiobus_free(mdio_bus); + pdata->mdio_bus = NULL; + + return 0; +} diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h new file mode 100644 index 0000000..a4c0a14 --- /dev/null +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h @@ -0,0 +1,353 @@ +/* Applied Micro X-Gene SoC Ethernet Driver + * + * Copyright (c) 2014, Applied Micro Circuits Corporation + * Authors: Iyappan Subramanian <isubramanian@xxxxxxx> + * Ravi Patel <rapatel@xxxxxxx> + * Keyur Chudgar <kchudgar@xxxxxxx> + * + * 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, or (at your + * option) any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __XGENE_ENET_HW_H__ +#define __XGENE_ENET_HW_H__ + +#include "xgene_enet_main.h" + +struct xgene_enet_pdata; +struct xgene_enet_stats; + +/* clears and then set bits */ +static inline void set_bits(u32 *dst, u32 val, u32 start, u32 len) +{ + u32 end = start + len - 1; + u32 mask = GENMASK(end, start); + + *dst &= ~mask; + *dst |= (val << start) & mask; +} + +static inline u32 get_bits(u32 val, u32 start, u32 end) +{ + return (val & GENMASK(end, start)) >> start; +} + +#define CSR_RING_ID 0x00000008 +#define OVERWRITE BIT(31) +#define IS_BUFFER_POOL BIT(20) +#define PREFETCH_BUF_EN BIT(21) +#define CSR_RING_ID_BUF 0x0000000c +#define CSR_RING_NE_INT_MODE 0x0000017c +#define CSR_RING_CONFIG 0x0000006c +#define CSR_RING_WR_BASE 0x00000070 +#define NUM_RING_CONFIG 5 +#define BUFPOOL_MODE 3 +#define RM3 3 +#define INC_DEC_CMD_ADDR 0x2c +#define IS_FP(x) ((x & 0x0020) ? 1 : 0) +#define UDP_HDR_SIZE 2 + +#define CREATE_MASK(pos, len) GENMASK(pos+len-1, pos) +#define CREATE_MASK_ULL(pos, len) GENMASK_ULL(pos+len-1, pos) + +/* Empty slot soft signature */ +#define EMPTY_SLOT_INDEX 1 +#define EMPTY_SLOT ~0ULL + +#define RING_BUFNUM(q) (q->id & 0x003F) +#define RING_OWNER(q) ((q->id & 0x03C0) >> 6) +#define BUF_LEN_CODE_2K 0x5000 + +#define SELTHRSH_POS 3 +#define SELTHRSH_LEN 3 +#define RINGADDRL_POS 5 +#define RINGADDRL_LEN 27 +#define RINGADDRH_POS 0 +#define RINGADDRH_LEN 6 +#define RINGSIZE_POS 23 +#define RINGSIZE_LEN 3 +#define RINGTYPE_POS 19 +#define RINGTYPE_LEN 2 +#define RINGMODE_POS 20 +#define RINGMODE_LEN 3 +#define RECOMTIMEOUTL_POS 28 +#define RECOMTIMEOUTL_LEN 3 +#define RECOMTIMEOUTH_POS 0 +#define RECOMTIMEOUTH_LEN 2 +#define NUMMSGSINQ_POS 1 +#define NUMMSGSINQ_LEN 16 +#define ACCEPTLERR BIT(19) +#define QCOHERENT BIT(4) +#define RECOMBBUF BIT(27) + +#define BLOCK_ETH_CSR_OFFSET 0x2000 +#define BLOCK_ETH_RING_IF_OFFSET 0x9000 +#define BLOCK_ETH_CLKRST_CSR_OFFSET 0xC000 +#define BLOCK_ETH_DIAG_CSR_OFFSET 0xD000 + +#define BLOCK_ETH_MAC_OFFSET 0x0000 +#define BLOCK_ETH_STATS_OFFSET 0x0014 +#define BLOCK_ETH_MAC_CSR_OFFSET 0x2800 + +/* Constants for indirect registers */ +#define MAC_ADDR_REG_OFFSET 0 +#define MAC_COMMAND_REG_OFFSET 4 +#define MAC_WRITE_REG_OFFSET 8 +#define MAC_READ_REG_OFFSET 12 +#define MAC_COMMAND_DONE_REG_OFFSET 16 + +#define STAT_ADDR_REG_OFFSET 0 +#define STAT_COMMAND_REG_OFFSET 4 +#define STAT_WRITE_REG_OFFSET 8 +#define STAT_READ_REG_OFFSET 12 +#define STAT_COMMAND_DONE_REG_OFFSET 16 + +/* Address PE_MCXMAC Registers */ +#define MII_MGMT_CONFIG_ADDR 0x20 +#define MII_MGMT_COMMAND_ADDR 0x24 +#define MII_MGMT_ADDRESS_ADDR 0x28 +#define MII_MGMT_CONTROL_ADDR 0x2c +#define MII_MGMT_STATUS_ADDR 0x30 +#define MII_MGMT_INDICATORS_ADDR 0x34 + +#define BUSY_MASK BIT(0) +#define READ_CYCLE_MASK BIT(0) +#define PHY_CONTROL_SET(dst, val) set_bits(dst, val, 0, 16) + +#define ENET_SPARE_CFG_REG_ADDR 0x00000750 +#define RSIF_CONFIG_REG_ADDR 0x00000010 +#define RSIF_RAM_DBG_REG0_ADDR 0x00000048 +#define RGMII_REG_0_ADDR 0x000007e0 +#define CFG_LINK_AGGR_RESUME_0_ADDR 0x000007c8 +#define DEBUG_REG_ADDR 0x00000700 +#define CFG_BYPASS_ADDR 0x00000294 +#define CLE_BYPASS_REG0_0_ADDR 0x00000490 +#define CLE_BYPASS_REG1_0_ADDR 0x00000494 +#define CFG_RSIF_FPBUFF_TIMEOUT_EN BIT(31) +#define RESUME_TX BIT(0) +#define CFG_SPEED_1250 BIT(24) +#define TX_PORT0 BIT(0) +#define CFG_BYPASS_UNISEC_TX BIT(2) +#define CFG_BYPASS_UNISEC_RX BIT(1) +#define CFG_TXCLK_MUXSEL0_SET(dst, val) set_bits(dst, val, 29, 3) +#define CFG_CLE_BYPASS_EN0 BIT(31) + +#define CFG_CLE_IP_PROTOCOL0_SET(dst, val) set_bits(dst, val, 16, 2) +#define CFG_CLE_DSTQID0_SET(dst, val) set_bits(dst, val, 0, 12) +#define CFG_CLE_FPSEL0_SET(dst, val) set_bits(dst, val, 16, 4) +#define CFG_MACMODE_SET(dst, val) set_bits(dst, val, 18, 2) +#define CFG_WAITASYNCRD_SET(dst, val) set_bits(dst, val, 0, 16) +#define ICM_CONFIG0_REG_0_ADDR 0x00000400 +#define ICM_CONFIG2_REG_0_ADDR 0x00000410 +#define RX_DV_GATE_REG_0_ADDR 0x000005fc +#define TX_DV_GATE_EN0 BIT(2) +#define RX_DV_GATE_EN0 BIT(1) +#define RESUME_RX0 BIT(0) +#define ENET_CFGSSQMIWQASSOC_ADDR 0x000000e0 +#define ENET_CFGSSQMIFPQASSOC_ADDR 0x000000dc +#define ENET_CFGSSQMIQMLITEFPQASSOC_ADDR 0x000000f0 +#define ENET_CFGSSQMIQMLITEWQASSOC_ADDR 0x000000f4 + +#define ENET_CFG_MEM_RAM_SHUTDOWN_ADDR 0x00000070 +#define ENET_BLOCK_MEM_RDY_ADDR 0x00000074 +#define MAC_CONFIG_1_ADDR 0x00000000 +#define MAC_CONFIG_2_ADDR 0x00000004 +#define MAX_FRAME_LEN_ADDR 0x00000010 +#define INTERFACE_CONTROL_ADDR 0x00000038 +#define STATION_ADDR0_ADDR 0x00000040 +#define STATION_ADDR1_ADDR 0x00000044 +#define SCAN_CYCLE_MASK_SET(dst, src) set_bits(dst, val, 0, 1) +#define PHY_ADDR_SET(dst, val) set_bits(dst, val, 8, 5) +#define REG_ADDR_SET(dst, val) set_bits(dst, val, 0, 5) +#define ENET_INTERFACE_MODE2_SET(dst, val) set_bits(dst, val, 8, 2) +#define MGMT_CLOCK_SEL_SET(dst, val) set_bits(dst, val, 0, 3) +#define SOFT_RESET1 BIT(31) +#define TX_EN BIT(0) +#define RX_EN BIT(2) +#define ENET_LHD_MODE BIT(25) +#define ENET_GHD_MODE BIT(26) +#define FULL_DUPLEX2 BIT(0) +#define SCAN_AUTO_INCR BIT(5) +#define RBYT_ADDR 0x00000027 +#define RPKT_ADDR 0x00000028 +#define RFCS_ADDR 0x00000029 +#define RALN_ADDR 0x0000002f +#define RFLR_ADDR 0x00000030 +#define RUND_ADDR 0x00000033 +#define ROVR_ADDR 0x00000034 +#define RDRP_ADDR 0x00000037 +#define TBYT_ADDR 0x00000038 +#define TPKT_ADDR 0x00000039 +#define TDRP_ADDR 0x00000045 +#define TFCS_ADDR 0x00000047 +#define TUND_ADDR 0x0000004a + +#define TSO_IPPROTO_TCP 1 +#define TSO_IPPROTO_UDP 0 +#define FULL_DUPLEX 2 + +#define USERINFO_POS 0 +#define USERINFO_LEN 32 +#define FPQNUM_POS 32 +#define FPQNUM_LEN 12 +#define STASH_POS 53 +#define STASH_LEN 2 +#define BUFDATALEN_POS 48 +#define BUFDATALEN_LEN 12 +#define BUFLEN_POS 60 +#define BUFLEN_LEN 3 +#define DATAADDR_POS 0 +#define DATAADDR_LEN 42 +#define COHERENT_POS 63 +#define COHERENT_LEN 1 +#define HENQNUM_POS 48 +#define HENQNUM_LEN 12 +#define TYPESEL_POS 44 +#define TYPESEL_LEN 4 +#define ETHHDR_POS 12 +#define ETHHDR_LEN 8 +#define IC_POS 35 /* Insert CRC */ +#define IC_LEN 1 +#define TCPHDR_POS 0 +#define TCPHDR_LEN 6 +#define IPHDR_POS 6 +#define IPHDR_LEN 5 +#define EC_POS 22 /* Enable checksum */ +#define EC_LEN 1 +#define IS_POS 24 /* IP protocol select */ +#define IS_LEN 1 + +struct xgene_enet_desc { + u64 m0; + u64 m1; + u64 m2; + u64 m3; +}; + +struct xgene_enet_desc16 { + u64 m0; + u64 m1; +}; + +static inline void xgene_enet_cpu_to_le64(void *desc_ptr, int count) +{ + u64 *desc = desc_ptr; + int i; + + for (i = 0; i < count; i++) + desc[i] = cpu_to_le64(desc[i]); +} + +static inline void xgene_enet_le64_to_cpu(void *desc_ptr, int count) +{ + u64 *desc = desc_ptr; + int i; + + for (i = 0; i < count; i++) + desc[i] = le64_to_cpu(desc[i]); +} + +static inline void xgene_enet_desc16_to_le64(void *desc_ptr) +{ + u64 *desc; + + desc = desc_ptr; + desc[1] = cpu_to_le64(desc[1]); +} + +static inline void xgene_enet_le64_to_desc16(void *desc_ptr) +{ + u64 *desc; + + desc = desc_ptr; + desc[1] = le64_to_cpu(desc[1]); +} + +enum xgene_enet_ring_cfgsize { + RING_CFGSIZE_512B, + RING_CFGSIZE_2KB, + RING_CFGSIZE_16KB, + RING_CFGSIZE_64KB, + RING_CFGSIZE_512KB, + RING_CFGSIZE_INVALID +}; + +enum xgene_enet_ring_type { + RING_DISABLED, + RING_REGULAR, + RING_BUFPOOL +}; + +enum xgene_enet_ring_owner { + RING_OWNER_ETH0, + RING_OWNER_CPU = 15, + RING_OWNER_INVALID +}; + +enum xgene_enet_ring_bufnum { + RING_BUFNUM_REGULAR = 0x0, + RING_BUFNUM_BUFPOOL = 0x20, + RING_BUFNUM_INVALID +}; + +struct xgene_enet_desc_ring *xgene_enet_setup_ring( + struct xgene_enet_desc_ring *ring); +void xgene_enet_clear_ring(struct xgene_enet_desc_ring *ring); + +enum desc_info_index { + USERINFO, + FPQNUM, + STASH, + DATAADDR, + BUFDATALEN, + BUFLEN, + COHERENT, + TCPHDR, + IPHDR, + ETHHDR, + EC, + IS, + IC, + TYPESEL, + HENQNUM, + MAX_DESC_INFO_INDEX +}; + +struct xgene_enet_desc_info { + u8 word_index; + u8 start_bit; + u8 len; +}; + +enum xgene_enet_cmd { + XGENE_ENET_WR_CMD = BIT(31), + XGENE_ENET_RD_CMD = BIT(30) +}; + +void set_desc(void *desc_ptr, enum desc_info_index index, u64 val); +u64 get_desc(void *desc_ptr, enum desc_info_index index); + +void xgene_enet_reset(struct xgene_enet_pdata *priv); +void xgene_gmac_reset(struct xgene_enet_pdata *priv); +void xgene_gmac_init(struct xgene_enet_pdata *priv, int speed); +void xgene_gmac_tx_enable(struct xgene_enet_pdata *priv); +void xgene_gmac_rx_enable(struct xgene_enet_pdata *priv); +void xgene_gmac_tx_disable(struct xgene_enet_pdata *priv); +void xgene_gmac_rx_disable(struct xgene_enet_pdata *priv); +void xgene_gmac_set_mac_addr(struct xgene_enet_pdata *pdata); +void xgene_enet_cle_bypass(struct xgene_enet_pdata *priv, + u32 dst_ring_num, u32 fpsel, u32 nxtfpsel); +void xgene_gport_shutdown(struct xgene_enet_pdata *priv); +void xgene_gmac_get_stats(struct xgene_enet_pdata *priv, + struct xgene_enet_stats *stats); +#endif /* __XGENE_ENET_HW_H__ */ diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c new file mode 100644 index 0000000..0feb571 --- /dev/null +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c @@ -0,0 +1,936 @@ +/* Applied Micro X-Gene SoC Ethernet Driver + * + * Copyright (c) 2014, Applied Micro Circuits Corporation + * Authors: Iyappan Subramanian <isubramanian@xxxxxxx> + * Ravi Patel <rapatel@xxxxxxx> + * Keyur Chudgar <kchudgar@xxxxxxx> + * + * 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, or (at your + * option) any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include "xgene_enet_main.h" +#include "xgene_enet_hw.h" + +static void xgene_enet_init_bufpool(struct xgene_enet_desc_ring *buf_pool) +{ + struct xgene_enet_desc16 *desc; + int i; + + for (i = 0; i < buf_pool->slots; i++) { + desc = &buf_pool->desc16[i]; + + set_desc(desc, USERINFO, i); + set_desc(desc, FPQNUM, buf_pool->dst_ring_num); + set_desc(desc, STASH, 1); + + /* Hardware expects descriptor in little endian format */ + xgene_enet_cpu_to_le64(desc, 4); + } +} + +static struct device *ndev_to_dev(struct net_device *ndev) +{ + struct xgene_enet_pdata *pdata = netdev_priv(ndev); + + return &pdata->pdev->dev; +} + +static int xgene_enet_refill_bufpool(struct xgene_enet_desc_ring *buf_pool, + u32 nbuf) +{ + struct sk_buff *skb; + struct xgene_enet_desc16 *desc; + struct net_device *ndev; + struct device *dev; + dma_addr_t dma_addr; + u32 tail = buf_pool->tail; + u32 slots = buf_pool->slots - 1; + int i, ret = 0; + u16 bufdatalen, len; + + ndev = buf_pool->ndev; + dev = ndev_to_dev(buf_pool->ndev); + bufdatalen = BUF_LEN_CODE_2K | (SKB_BUFFER_SIZE & GENMASK(11, 0)); + len = XGENE_ENET_MAX_MTU; + + for (i = 0; i < nbuf; i++) { + desc = &buf_pool->desc16[tail]; + + skb = netdev_alloc_skb_ip_align(ndev, len); + if (unlikely(!skb)) { + ret = -ENOMEM; + goto out; + } + buf_pool->rx_skb[tail] = skb; + + dma_addr = dma_map_single(dev, skb->data, len, DMA_FROM_DEVICE); + if (dma_mapping_error(dev, dma_addr)) { + netdev_err(ndev, "DMA mapping error\n"); + dev_kfree_skb_any(skb); + ret = -EINVAL; + goto out; + } + set_desc(desc, DATAADDR, dma_addr); + set_desc(desc, BUFDATALEN, bufdatalen); + set_desc(desc, COHERENT, 1); + + xgene_enet_desc16_to_le64(desc); + tail = (tail + 1) & slots; + } + + iowrite32(nbuf, buf_pool->cmd); + buf_pool->tail = tail; + +out: + return ret; +} + +static u16 xgene_enet_dst_ring_num(struct xgene_enet_desc_ring *ring) +{ + struct xgene_enet_pdata *pdata = netdev_priv(ring->ndev); + + return ((u16)pdata->rm << 10) | ring->num; +} + +static u8 xgene_enet_hdr_len(const void *data) +{ + const struct ethhdr *eth = data; + + return (eth->h_proto == htons(ETH_P_8021Q)) ? VLAN_ETH_HLEN : ETH_HLEN; +} + +static u32 xgene_enet_ring_len(struct xgene_enet_desc_ring *ring) +{ + u32 *cmd_base = ring->cmd_base; + u32 ring_state, num_msgs; + + ring_state = ioread32(&cmd_base[1]); + num_msgs = ring_state & CREATE_MASK(NUMMSGSINQ_POS, NUMMSGSINQ_LEN); + return num_msgs >> NUMMSGSINQ_POS; +} + +static void xgene_enet_delete_bufpool(struct xgene_enet_desc_ring *buf_pool) +{ + u32 tail = buf_pool->tail; + u32 slots = buf_pool->slots - 1; + int len = xgene_enet_ring_len(buf_pool); + struct xgene_enet_desc16 *desc; + u32 userinfo; + int i; + + for (i = 0; i < len; i++) { + tail = (tail - 1) & slots; + desc = &buf_pool->desc16[tail]; + + /* Hardware stores descriptor in little endian format */ + xgene_enet_le64_to_desc16(desc); + userinfo = get_desc(desc, USERINFO); + dev_kfree_skb_any(buf_pool->rx_skb[userinfo]); + } + + iowrite32(-len, buf_pool->cmd); + buf_pool->tail = tail; +} + +irqreturn_t xgene_enet_rx_irq(const int irq, void *data) +{ + struct xgene_enet_desc_ring *rx_ring = data; + + if (napi_schedule_prep(&rx_ring->napi)) { + disable_irq_nosync(irq); + __napi_schedule(&rx_ring->napi); + } + + return IRQ_HANDLED; +} + +static int xgene_enet_tx_completion(struct xgene_enet_desc_ring *cp_ring, + struct xgene_enet_desc *desc) +{ + struct sk_buff *skb; + dma_addr_t pa; + size_t len; + struct device *dev; + u16 skb_index; + int ret = 0; + + skb_index = get_desc(desc, USERINFO); + skb = cp_ring->cp_skb[skb_index]; + + dev = ndev_to_dev(cp_ring->ndev); + pa = (dma_addr_t)get_desc(desc, DATAADDR); + len = get_desc(desc, BUFDATALEN); + dma_unmap_single(dev, pa, len, DMA_TO_DEVICE); + + if (likely(skb)) { + dev_kfree_skb_any(skb); + } else { + netdev_err(cp_ring->ndev, "completion skb is NULL\n"); + ret = -1; + } + + return ret; +} + +static void xgene_enet_checksum_offload(struct xgene_enet_desc *desc, + struct sk_buff *skb) +{ + u32 maclen, nr_frags; + struct iphdr *iph; + u8 l4hlen = 0; + u8 l3hlen = 0; + u8 csum_enable = 0; + u8 proto = 0; + struct net_device *ndev = skb->dev; + + if (unlikely(!(ndev->features & NETIF_F_IP_CSUM))) + goto out; + if (unlikely(skb->protocol != htons(ETH_P_IP)) && + unlikely(skb->protocol != htons(ETH_P_8021Q))) + goto out; + + nr_frags = skb_shinfo(skb)->nr_frags; + maclen = xgene_enet_hdr_len(skb->data); + iph = ip_hdr(skb); + l3hlen = ip_hdrlen(skb) >> 2; + + if (unlikely(iph->frag_off & htons(IP_MF | IP_OFFSET))) + goto out; + if (likely(iph->protocol == IPPROTO_TCP)) { + l4hlen = tcp_hdrlen(skb) / 4; + csum_enable = 1; + proto = TSO_IPPROTO_TCP; + } else if (iph->protocol == IPPROTO_UDP) { + l4hlen = UDP_HDR_SIZE; + csum_enable = 1; + proto = TSO_IPPROTO_UDP; + } + + set_desc(desc, TCPHDR, l4hlen); + set_desc(desc, IPHDR, l3hlen); + set_desc(desc, EC, csum_enable); + set_desc(desc, IS, proto); +out: + return; +} + +static int xgene_enet_setup_tx_desc(struct xgene_enet_desc_ring *tx_ring, + struct sk_buff *skb) +{ + struct xgene_enet_desc *desc; + dma_addr_t dma_addr; + u8 ethhdr; + u16 tail = tx_ring->tail; + struct device *dev = ndev_to_dev(tx_ring->ndev); + + desc = &tx_ring->desc[tail]; + memset(desc, 0, sizeof(struct xgene_enet_desc)); + + dma_addr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE); + if (dma_mapping_error(dev, dma_addr)) { + netdev_err(tx_ring->ndev, "DMA mapping error\n"); + return -EINVAL; + } + set_desc(desc, DATAADDR, dma_addr); + + set_desc(desc, BUFDATALEN, skb->len); + set_desc(desc, COHERENT, 1); + tx_ring->cp_ring->cp_skb[tail] = skb; + set_desc(desc, USERINFO, tail); + set_desc(desc, HENQNUM, tx_ring->dst_ring_num); + set_desc(desc, TYPESEL, 1); + ethhdr = xgene_enet_hdr_len(skb->data); + set_desc(desc, ETHHDR, ethhdr); + set_desc(desc, IC, 1); + + xgene_enet_checksum_offload(desc, skb); + + /* Hardware expects descriptor in little endian format */ + xgene_enet_cpu_to_le64(desc, 4); + + return 0; +} + +static netdev_tx_t xgene_enet_start_xmit(struct sk_buff *skb, + struct net_device *ndev) +{ + struct xgene_enet_pdata *pdata = netdev_priv(ndev); + struct xgene_enet_desc_ring *tx_ring = pdata->tx_ring; + struct xgene_enet_desc_ring *cp_ring = tx_ring->cp_ring; + u32 tx_level, cq_level; + u32 pkt_count = 1; + + tx_level = xgene_enet_ring_len(tx_ring); + cq_level = xgene_enet_ring_len(cp_ring); + if (tx_level > pdata->tx_qcnt_hi || cq_level > pdata->cp_qcnt_hi) { + netif_stop_queue(ndev); + return NETDEV_TX_BUSY; + } + + if (xgene_enet_setup_tx_desc(tx_ring, skb)) + goto out; + + skb_tx_timestamp(skb); + + tx_ring->tail = (tx_ring->tail + 1) & (tx_ring->slots - 1); + iowrite32(pkt_count, tx_ring->cmd); +out: + return NETDEV_TX_OK; +} + +void xgene_enet_skip_csum(struct sk_buff *skb) +{ + struct iphdr *iph = (struct iphdr *)skb->data; + + if (!(iph->frag_off & htons(IP_MF | IP_OFFSET)) || + (iph->protocol != IPPROTO_TCP && iph->protocol != IPPROTO_UDP)) { + skb->ip_summed = CHECKSUM_UNNECESSARY; + } +} + +static int xgene_enet_rx_frame(struct xgene_enet_desc_ring *rx_ring, + struct xgene_enet_desc *desc) +{ + struct net_device *ndev = rx_ring->ndev; + struct device *dev = ndev_to_dev(rx_ring->ndev); + struct xgene_enet_desc_ring *buf_pool = rx_ring->buf_pool; + u32 datalen, skb_index; + struct sk_buff *skb; + dma_addr_t pa; + int ret = 0; + + skb_index = get_desc(desc, USERINFO); + skb = buf_pool->rx_skb[skb_index]; + prefetch(skb->data - NET_IP_ALIGN); + + /* Strip off CRC as HW isn't doing this */ + datalen = get_desc(desc, BUFDATALEN); + datalen -= 4; + skb_put(skb, datalen); + + pa = (dma_addr_t)get_desc(desc, DATAADDR); + dma_unmap_single(dev, pa, XGENE_ENET_MAX_MTU, DMA_FROM_DEVICE); + + if (--rx_ring->nbufpool == 0) { + ret = xgene_enet_refill_bufpool(buf_pool, NUM_BUFPOOL); + rx_ring->nbufpool = NUM_BUFPOOL; + } + + skb_checksum_none_assert(skb); + skb->protocol = eth_type_trans(skb, ndev); + if (likely((ndev->features & NETIF_F_IP_CSUM) && + skb->protocol == htons(ETH_P_IP))) { + xgene_enet_skip_csum(skb); + } + + napi_gro_receive(&rx_ring->napi, skb); + + return ret; +} + +static int xgene_enet_process_ring(struct xgene_enet_desc_ring *ring, + int budget) +{ + struct net_device *ndev = ring->ndev; + struct xgene_enet_pdata *pdata = netdev_priv(ring->ndev); + struct xgene_enet_desc *desc; + int napi_budget = budget; + int cmd = 0, ret = 0; + u16 head = ring->head; + u16 slots = ring->slots - 1; + + do { + desc = &ring->desc[head]; + if (unlikely(((u64 *)desc)[EMPTY_SLOT_INDEX] == EMPTY_SLOT)) + break; + + /* Hardware stores descriptor in little endian format */ + xgene_enet_le64_to_cpu(desc, 4); + if (get_desc(desc, FPQNUM)) + ret = xgene_enet_rx_frame(ring, desc); + else + ret = xgene_enet_tx_completion(ring, desc); + ((u64 *)desc)[EMPTY_SLOT_INDEX] = EMPTY_SLOT; + + head = (head + 1) & slots; + cmd++; + + if (ret) + break; + } while (--budget); + + if (likely(cmd)) { + iowrite32(-cmd, ring->cmd); + ring->head = head; + + if (netif_queue_stopped(ndev)) { + if (xgene_enet_ring_len(ring) < pdata->cp_qcnt_low) + netif_wake_queue(ndev); + } + } + + return napi_budget - budget; +} + +static int xgene_enet_napi(struct napi_struct *napi, const int budget) +{ + struct xgene_enet_desc_ring *ring = + container_of(napi, struct xgene_enet_desc_ring, napi); + int processed = xgene_enet_process_ring(ring, budget); + + if (processed != budget) { + napi_complete(napi); + enable_irq(ring->irq); + } + + return processed; +} + +static void xgene_enet_timeout(struct net_device *ndev) +{ + struct xgene_enet_pdata *pdata = netdev_priv(ndev); + + xgene_gmac_reset(pdata); +} + +static int xgene_enet_register_irq(struct net_device *ndev) +{ + struct xgene_enet_pdata *pdata = netdev_priv(ndev); + struct device *dev = &pdata->pdev->dev; + int ret; + + ret = devm_request_irq(dev, pdata->rx_ring->irq, xgene_enet_rx_irq, + IRQF_SHARED, ndev->name, pdata->rx_ring); + if (ret) { + netdev_err(ndev, "rx%d interrupt request failed\n", + pdata->rx_ring->irq); + } + + return ret; +} + +static void xgene_enet_free_irq(struct net_device *ndev) +{ + struct xgene_enet_pdata *pdata = netdev_priv(ndev); + struct device *dev = &pdata->pdev->dev; + + devm_free_irq(dev, pdata->rx_ring->irq, pdata->rx_ring); +} + +static int xgene_enet_open(struct net_device *ndev) +{ + int ret = 0; + struct xgene_enet_pdata *pdata = netdev_priv(ndev); + + xgene_gmac_tx_enable(pdata); + xgene_gmac_rx_enable(pdata); + + ret = xgene_enet_register_irq(ndev); + if (ret) + goto out; + napi_enable(&pdata->rx_ring->napi); + + if (pdata->phy_dev) + phy_start(pdata->phy_dev); + + netif_start_queue(ndev); +out: + return ret; +} + +static int xgene_enet_close(struct net_device *ndev) +{ + struct xgene_enet_pdata *pdata = netdev_priv(ndev); + + netif_stop_queue(ndev); + + if (pdata->phy_dev) + phy_stop(pdata->phy_dev); + + napi_disable(&pdata->rx_ring->napi); + xgene_enet_free_irq(ndev); + xgene_enet_process_ring(pdata->rx_ring, -1); + + xgene_gmac_tx_disable(pdata); + xgene_gmac_rx_disable(pdata); + + return 0; +} + +static void xgene_enet_delete_ring(struct xgene_enet_desc_ring *ring) +{ + struct xgene_enet_pdata *pdata = netdev_priv(ring->ndev); + struct device *dev = &pdata->pdev->dev; + + xgene_enet_clear_ring(ring); + dma_free_coherent(dev, ring->size, ring->desc_addr, ring->dma); + devm_kfree(dev, ring); +} + +static void xgene_enet_delete_desc_rings(struct xgene_enet_pdata *pdata) +{ + struct device *dev = &pdata->pdev->dev; + struct xgene_enet_desc_ring *buf_pool; + + if (pdata->tx_ring) { + xgene_enet_delete_ring(pdata->tx_ring); + pdata->tx_ring = NULL; + } + + if (pdata->rx_ring) { + buf_pool = pdata->rx_ring->buf_pool; + xgene_enet_delete_bufpool(buf_pool); + xgene_enet_delete_ring(buf_pool); + devm_kfree(dev, buf_pool->rx_skb); + + xgene_enet_delete_ring(pdata->rx_ring); + pdata->rx_ring = NULL; + } +} + +static int xgene_enet_get_ring_size(struct device *dev, + enum xgene_enet_ring_cfgsize cfgsize) +{ + int size = -EINVAL; + + switch (cfgsize) { + case RING_CFGSIZE_512B: + size = 0x200; + break; + case RING_CFGSIZE_2KB: + size = 0x800; + break; + case RING_CFGSIZE_16KB: + size = 0x4000; + break; + case RING_CFGSIZE_64KB: + size = 0x10000; + break; + case RING_CFGSIZE_512KB: + size = 0x80000; + break; + default: + dev_err(dev, "Unsupported cfg ring size %d\n", cfgsize); + break; + } + + return size; +} + +static struct xgene_enet_desc_ring *xgene_enet_create_desc_ring( + struct net_device *ndev, u32 ring_num, + enum xgene_enet_ring_cfgsize cfgsize, u32 ring_id) +{ + struct xgene_enet_desc_ring *ring; + struct xgene_enet_pdata *pdata = netdev_priv(ndev); + struct device *dev = &pdata->pdev->dev; + u32 size; + + ring = devm_kzalloc(dev, sizeof(struct xgene_enet_desc_ring), + GFP_KERNEL); + if (!ring) + goto err; + + ring->ndev = ndev; + ring->num = ring_num; + ring->cfgsize = cfgsize; + ring->id = ring_id; + + size = xgene_enet_get_ring_size(dev, cfgsize); + ring->desc_addr = dma_zalloc_coherent(dev, size, &ring->dma, + GFP_KERNEL); + if (!ring->desc_addr) + goto err; + ring->size = size; + + ring->cmd_base = pdata->ring_cmd_addr + (ring->num << 6); + ring->cmd = ring->cmd_base + INC_DEC_CMD_ADDR; + pdata->rm = RM3; + ring = xgene_enet_setup_ring(ring); + netdev_dbg(ndev, "ring info: num=%d size=%d id=%d slots=%d\n", + ring->num, ring->size, ring->id, ring->slots); + + return ring; +err: + if (ring && ring->desc_addr) { + dma_free_coherent(dev, size, ring->desc_addr, ring->dma); + devm_kfree(dev, ring); + } + if (ring) + devm_kfree(dev, ring); + + return NULL; +} + +static int xgene_enet_create_desc_rings(struct net_device *ndev) +{ + struct xgene_enet_pdata *pdata = netdev_priv(ndev); + struct device *dev = &pdata->pdev->dev; + struct xgene_enet_desc_ring *rx_ring, *tx_ring, *cp_ring; + struct xgene_enet_desc_ring *buf_pool = NULL; + u32 ring_num = 0; + u32 ring_id; + int ret = 0; + + /* allocate rx descriptor ring */ + ring_id = (RING_OWNER_CPU << 6) | RING_BUFNUM_REGULAR; + rx_ring = xgene_enet_create_desc_ring(ndev, ring_num++, + RING_CFGSIZE_16KB, ring_id); + if (IS_ERR_OR_NULL(rx_ring)) { + ret = PTR_ERR(rx_ring); + goto err; + } + + /* allocate buffer pool for receiving packets */ + ring_id = (RING_OWNER_ETH0 << 6) | RING_BUFNUM_BUFPOOL; + buf_pool = xgene_enet_create_desc_ring(ndev, ring_num++, + RING_CFGSIZE_2KB, ring_id); + if (IS_ERR_OR_NULL(buf_pool)) { + ret = PTR_ERR(buf_pool); + goto err; + } + + rx_ring->nbufpool = NUM_BUFPOOL; + rx_ring->buf_pool = buf_pool; + rx_ring->irq = pdata->rx_irq; + buf_pool->rx_skb = devm_kcalloc(dev, buf_pool->slots, + sizeof(struct sk_buff *), GFP_KERNEL); + if (!buf_pool->rx_skb) { + ret = -ENOMEM; + goto err; + } + + buf_pool->dst_ring_num = xgene_enet_dst_ring_num(buf_pool); + rx_ring->buf_pool = buf_pool; + pdata->rx_ring = rx_ring; + + /* allocate tx descriptor ring */ + ring_id = (RING_OWNER_ETH0 << 6) | RING_BUFNUM_REGULAR; + tx_ring = xgene_enet_create_desc_ring(ndev, ring_num++, + RING_CFGSIZE_16KB, ring_id); + if (IS_ERR_OR_NULL(tx_ring)) { + ret = PTR_ERR(tx_ring); + goto err; + } + pdata->tx_ring = tx_ring; + + cp_ring = pdata->rx_ring; + cp_ring->cp_skb = devm_kcalloc(dev, tx_ring->slots, + sizeof(struct sk_buff *), GFP_KERNEL); + if (!cp_ring->cp_skb) { + ret = -ENOMEM; + goto err; + } + pdata->tx_ring->cp_ring = cp_ring; + pdata->tx_ring->dst_ring_num = xgene_enet_dst_ring_num(cp_ring); + + pdata->tx_qcnt_hi = pdata->tx_ring->slots / 2; + pdata->cp_qcnt_hi = pdata->rx_ring->slots / 2; + pdata->cp_qcnt_low = pdata->cp_qcnt_hi / 2; + + return 0; + +err: + xgene_enet_delete_desc_rings(pdata); + return ret; +} + +static struct net_device_stats *xgene_enet_get_stats(struct net_device *ndev) +{ + struct xgene_enet_pdata *pdata = netdev_priv(ndev); + struct net_device_stats *nst = &pdata->nstats; + struct xgene_enet_stats stats; + struct xgene_enet_rx_stats *rx_stats; + struct xgene_enet_tx_stats *tx_stats; + u32 pkt_bytes, crc_bytes = 4; + + memset(&stats, 0, sizeof(struct xgene_enet_stats)); + rx_stats = &stats.rx_stats; + tx_stats = &stats.tx_stats; + + spin_lock(&pdata->stats_lock); + xgene_gmac_get_stats(pdata, &stats); + + pkt_bytes = rx_stats->byte_cntr; + pkt_bytes -= rx_stats->pkt_cntr * crc_bytes; + nst->rx_packets += rx_stats->pkt_cntr; + nst->rx_bytes += pkt_bytes; + + pkt_bytes = tx_stats->byte_cntr; + pkt_bytes -= tx_stats->pkt_cntr * crc_bytes; + nst->tx_packets += tx_stats->pkt_cntr; + nst->tx_bytes += pkt_bytes; + + nst->rx_dropped += rx_stats->dropped_pkt_cntr; + nst->tx_dropped += tx_stats->drop_frame_cntr; + + nst->rx_crc_errors += rx_stats->fcs_error_cntr; + nst->rx_length_errors += rx_stats->frm_len_err_cntr; + nst->rx_frame_errors += rx_stats->align_err_cntr; + nst->rx_over_errors += rx_stats->oversize_pkt_cntr; + + nst->rx_errors += rx_stats->fcs_error_cntr + + rx_stats->frm_len_err_cntr + + rx_stats->oversize_pkt_cntr + + rx_stats->undersize_pkt_cntr; + + nst->tx_errors += tx_stats->fcs_error_cntr + + tx_stats->undersize_frame_cntr; + spin_unlock(&pdata->stats_lock); + + return nst; +} + +static int xgene_enet_set_mac_address(struct net_device *ndev, void *addr) +{ + struct xgene_enet_pdata *pdata = netdev_priv(ndev); + int ret; + + ret = eth_mac_addr(ndev, addr); + if (ret) + goto out; + + xgene_gmac_set_mac_addr(pdata); +out: + return ret; +} + +static const struct net_device_ops xgene_ndev_ops = { + .ndo_open = xgene_enet_open, + .ndo_stop = xgene_enet_close, + .ndo_start_xmit = xgene_enet_start_xmit, + .ndo_tx_timeout = xgene_enet_timeout, + .ndo_get_stats = xgene_enet_get_stats, + .ndo_change_mtu = eth_change_mtu, + .ndo_set_mac_address = xgene_enet_set_mac_address, +}; + +static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata) +{ + struct platform_device *pdev; + struct net_device *ndev; + struct device *dev; + struct resource *res; + void *base_addr; + const char *mac; + int ret = 0; + + pdev = pdata->pdev; + dev = &pdev->dev; + ndev = pdata->ndev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(dev, "Resource IORESOURCE_MEM 0 not defined\n"); + ret = -ENODEV; + goto out; + } + pdata->base_addr = devm_ioremap_resource(dev, res); + if (IS_ERR(pdata->base_addr)) { + dev_err(dev, "Unable to retrieve ENET Port CSR region\n"); + return PTR_ERR(pdata->base_addr); + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (!res) { + dev_err(dev, "Resource IORESOURCE_MEM 1 not defined\n"); + ret = -ENODEV; + goto out; + } + pdata->ring_csr_addr = devm_ioremap_resource(dev, res); + if (IS_ERR(pdata->ring_csr_addr)) { + dev_err(dev, "Unable to retrieve ENET Ring CSR region\n"); + return PTR_ERR(pdata->ring_csr_addr); + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 2); + if (!res) { + dev_err(dev, "Resource IORESOURCE_MEM 2 not defined\n"); + ret = -ENODEV; + goto out; + } + pdata->ring_cmd_addr = devm_ioremap_resource(dev, res); + if (IS_ERR(pdata->ring_cmd_addr)) { + dev_err(dev, "Unable to retrieve ENET Ring command region\n"); + return PTR_ERR(pdata->ring_cmd_addr); + } + + ret = platform_get_irq(pdev, 0); + if (ret <= 0) { + dev_err(dev, "Unable to get ENET Rx IRQ\n"); + goto out; + } + pdata->rx_irq = ret; + + mac = of_get_mac_address(dev->of_node); + if (mac) + memcpy(ndev->dev_addr, mac, ndev->addr_len); + else + eth_hw_addr_random(ndev); + memcpy(ndev->perm_addr, ndev->dev_addr, ndev->addr_len); + + pdata->phy_mode = of_get_phy_mode(pdev->dev.of_node); + if (pdata->phy_mode < 0) { + dev_err(dev, "Incorrect phy-connection-type in DTS\n"); + ret = -EINVAL; + goto out; + } + + pdata->clk = devm_clk_get(&pdev->dev, NULL); + ret = IS_ERR(pdata->clk); + if (ret) { + dev_err(&pdev->dev, "can't get clock\n"); + goto out; + } + + base_addr = pdata->base_addr; + pdata->eth_csr_addr = base_addr + BLOCK_ETH_CSR_OFFSET; + pdata->eth_ring_if_addr = base_addr + BLOCK_ETH_RING_IF_OFFSET; + pdata->eth_diag_csr_addr = base_addr + BLOCK_ETH_DIAG_CSR_OFFSET; + pdata->mcx_mac_addr = base_addr + BLOCK_ETH_MAC_OFFSET; + pdata->mcx_stats_addr = base_addr + BLOCK_ETH_STATS_OFFSET; + pdata->mcx_mac_csr_addr = base_addr + BLOCK_ETH_MAC_CSR_OFFSET; + pdata->rx_buff_cnt = NUM_PKT_BUF; +out: + return ret; +} + +static int xgene_enet_init_hw(struct xgene_enet_pdata *pdata) +{ + struct net_device *ndev = pdata->ndev; + struct xgene_enet_desc_ring *buf_pool; + int ret = 0; + + xgene_enet_reset(pdata); + + xgene_gmac_tx_disable(pdata); + xgene_gmac_rx_disable(pdata); + + ret = xgene_enet_create_desc_rings(ndev); + if (ret) { + netdev_err(ndev, "Error in ring configuration\n"); + goto out; + } + + /* setup buffer pool */ + buf_pool = pdata->rx_ring->buf_pool; + xgene_enet_init_bufpool(buf_pool); + ret = xgene_enet_refill_bufpool(buf_pool, pdata->rx_buff_cnt); + if (ret) + goto out; + + xgene_enet_cle_bypass(pdata, xgene_enet_dst_ring_num(pdata->rx_ring), + RING_BUFNUM(buf_pool) - 0x20, 0); + xgene_gmac_init(pdata, SPEED_1000); +out: + return ret; +} + +static int xgene_enet_probe(struct platform_device *pdev) +{ + struct net_device *ndev; + struct xgene_enet_pdata *pdata; + struct device *dev = &pdev->dev; + struct napi_struct *napi; + int ret = 0; + + ndev = alloc_etherdev(sizeof(struct xgene_enet_pdata)); + if (!ndev) + return -ENOMEM; + + pdata = netdev_priv(ndev); + + pdata->pdev = pdev; + pdata->ndev = ndev; + SET_NETDEV_DEV(ndev, dev); + platform_set_drvdata(pdev, pdata); + ndev->netdev_ops = &xgene_ndev_ops; + ndev->features |= NETIF_F_IP_CSUM; + ndev->features |= NETIF_F_GSO; + ndev->features |= NETIF_F_GRO; + + ret = xgene_enet_get_resources(pdata); + if (ret) + goto err; + + ret = register_netdev(ndev); + if (ret) { + netdev_err(ndev, "Failed to register netdev\n"); + goto err; + } + + ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)); + if (ret) { + netdev_err(ndev, "No usable DMA configuration\n"); + goto err; + } + + ret = xgene_enet_init_hw(pdata); + if (ret) + goto err; + + napi = &pdata->rx_ring->napi; + netif_napi_add(ndev, napi, xgene_enet_napi, NAPI_POLL_WEIGHT); + ret = xgene_enet_mdio_config(pdata); + + return ret; +err: + free_netdev(ndev); + return ret; +} + +static int xgene_enet_remove(struct platform_device *pdev) +{ + struct xgene_enet_pdata *pdata; + struct net_device *ndev; + + pdata = platform_get_drvdata(pdev); + ndev = pdata->ndev; + + xgene_gmac_rx_disable(pdata); + xgene_gmac_tx_disable(pdata); + + netif_napi_del(&pdata->rx_ring->napi); + xgene_enet_mdio_remove(pdata); + xgene_enet_delete_desc_rings(pdata); + unregister_netdev(ndev); + xgene_gport_shutdown(pdata); + free_netdev(ndev); + + return 0; +} + +static struct of_device_id xgene_enet_match[] = { + {.compatible = "apm,xgene-enet",}, + {}, +}; + +MODULE_DEVICE_TABLE(of, xgene_enet_match); + +static struct platform_driver xgene_enet_driver = { + .driver = { + .name = "xgene-enet", + .owner = THIS_MODULE, + .of_match_table = xgene_enet_match, + }, + .probe = xgene_enet_probe, + .remove = xgene_enet_remove, +}; + +module_platform_driver(xgene_enet_driver); + +MODULE_DESCRIPTION("APM X-Gene SoC Ethernet driver"); +MODULE_VERSION("1.0"); +MODULE_AUTHOR("Keyur Chudgar <kchudgar@xxxxxxx>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.h b/drivers/net/ethernet/apm/xgene/xgene_enet_main.h new file mode 100644 index 0000000..3d20ecf --- /dev/null +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.h @@ -0,0 +1,131 @@ +/* Applied Micro X-Gene SoC Ethernet Driver + * + * Copyright (c) 2014, Applied Micro Circuits Corporation + * Authors: Iyappan Subramanian <isubramanian@xxxxxxx> + * Ravi Patel <rapatel@xxxxxxx> + * Keyur Chudgar <kchudgar@xxxxxxx> + * + * 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, or (at your + * option) any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __XGENE_ENET_MAIN_H__ +#define __XGENE_ENET_MAIN_H__ + +#include <linux/clk.h> +#include <linux/of_platform.h> +#include <linux/of_net.h> +#include <linux/of_mdio.h> +#include <linux/module.h> +#include <net/ip.h> +#include <linux/if_vlan.h> +#include <linux/phy.h> +#include "xgene_enet_hw.h" + +#define XGENE_ENET_MAX_MTU 1536 +#define SKB_BUFFER_SIZE (XGENE_ENET_MAX_MTU - NET_IP_ALIGN) + +#define NUM_PKT_BUF 64 +#define NUM_BUFPOOL 32 + +/* software context of a descriptor ring */ +struct xgene_enet_desc_ring { + struct net_device *ndev; + u16 id; + u16 num; + u16 head; + u16 tail; + u16 slots; + u16 irq; + u32 size; + u32 state[NUM_RING_CONFIG]; + void __iomem *cmd_base; + void __iomem *cmd; + dma_addr_t dma; + u16 dst_ring_num; + u8 nbufpool; + struct sk_buff *(*rx_skb); + struct sk_buff *(*cp_skb); + enum xgene_enet_ring_cfgsize cfgsize; + struct xgene_enet_desc_ring *cp_ring; + struct xgene_enet_desc_ring *buf_pool; + struct napi_struct napi; + union { + void *desc_addr; + struct xgene_enet_desc *desc; + struct xgene_enet_desc16 *desc16; + }; +}; + +struct xgene_enet_rx_stats { + u32 byte_cntr; + u32 pkt_cntr; + u32 fcs_error_cntr; + u32 align_err_cntr; + u32 frm_len_err_cntr; + u32 undersize_pkt_cntr; + u32 oversize_pkt_cntr; + u32 dropped_pkt_cntr; +}; + +struct xgene_enet_tx_stats { + u32 byte_cntr; + u32 pkt_cntr; + u32 drop_frame_cntr; + u32 fcs_error_cntr; + u32 undersize_frame_cntr; +}; + +struct xgene_enet_stats { + struct xgene_enet_rx_stats rx_stats; + struct xgene_enet_tx_stats tx_stats; +}; + +/* ethernet private data */ +struct xgene_enet_pdata { + struct net_device *ndev; + struct mii_bus *mdio_bus; + struct phy_device *phy_dev; + int phy_link; + int phy_speed; + struct clk *clk; + struct platform_device *pdev; + struct xgene_enet_desc_ring *tx_ring; + struct xgene_enet_desc_ring *rx_ring; + struct net_device_stats nstats; + char *dev_name; + u32 rx_buff_cnt; + u32 tx_qcnt_hi; + u32 cp_qcnt_hi; + u32 cp_qcnt_low; + u32 rx_irq; + void __iomem *eth_csr_addr; + void __iomem *eth_ring_if_addr; + void __iomem *eth_diag_csr_addr; + void __iomem *mcx_mac_addr; + void __iomem *mcx_stats_addr; + void __iomem *mcx_mac_csr_addr; + void __iomem *base_addr; + void __iomem *ring_csr_addr; + void __iomem *ring_cmd_addr; + u32 phy_addr; + int phy_mode; + u32 speed; + u16 rm; + spinlock_t stats_lock; +}; + +int xgene_enet_mdio_config(struct xgene_enet_pdata *pdata); +int xgene_enet_mdio_remove(struct xgene_enet_pdata *pdata); + +#endif /* __XGENE_ENET_MAIN_H__ */ -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
