diff options
Diffstat (limited to 'drivers/net/ethernet/renesas/rswitch.c')
| -rw-r--r-- | drivers/net/ethernet/renesas/rswitch.c | 1962 |
1 files changed, 0 insertions, 1962 deletions
diff --git a/drivers/net/ethernet/renesas/rswitch.c b/drivers/net/ethernet/renesas/rswitch.c deleted file mode 100644 index 4e412ac0965a..000000000000 --- a/drivers/net/ethernet/renesas/rswitch.c +++ /dev/null @@ -1,1962 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* Renesas Ethernet Switch device driver - * - * Copyright (C) 2022 Renesas Electronics Corporation - */ - -#include <linux/dma-mapping.h> -#include <linux/err.h> -#include <linux/etherdevice.h> -#include <linux/iopoll.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/net_tstamp.h> -#include <linux/of.h> -#include <linux/of_device.h> -#include <linux/of_irq.h> -#include <linux/of_mdio.h> -#include <linux/of_net.h> -#include <linux/phy/phy.h> -#include <linux/pm_runtime.h> -#include <linux/rtnetlink.h> -#include <linux/slab.h> -#include <linux/spinlock.h> - -#include "rswitch.h" - -static int rswitch_reg_wait(void __iomem *addr, u32 offs, u32 mask, u32 expected) -{ - u32 val; - - return readl_poll_timeout_atomic(addr + offs, val, (val & mask) == expected, - 1, RSWITCH_TIMEOUT_US); -} - -static void rswitch_modify(void __iomem *addr, enum rswitch_reg reg, u32 clear, u32 set) -{ - iowrite32((ioread32(addr + reg) & ~clear) | set, addr + reg); -} - -/* Common Agent block (COMA) */ -static void rswitch_reset(struct rswitch_private *priv) -{ - iowrite32(RRC_RR, priv->addr + RRC); - iowrite32(RRC_RR_CLR, priv->addr + RRC); -} - -static void rswitch_clock_enable(struct rswitch_private *priv) -{ - iowrite32(RCEC_ACE_DEFAULT | RCEC_RCE, priv->addr + RCEC); -} - -static void rswitch_clock_disable(struct rswitch_private *priv) -{ - iowrite32(RCDC_RCD, priv->addr + RCDC); -} - -static bool rswitch_agent_clock_is_enabled(void __iomem *coma_addr, int port) -{ - u32 val = ioread32(coma_addr + RCEC); - - if (val & RCEC_RCE) - return (val & BIT(port)) ? true : false; - else - return false; -} - -static void rswitch_agent_clock_ctrl(void __iomem *coma_addr, int port, int enable) -{ - u32 val; - - if (enable) { - val = ioread32(coma_addr + RCEC); - iowrite32(val | RCEC_RCE | BIT(port), coma_addr + RCEC); - } else { - val = ioread32(coma_addr + RCDC); - iowrite32(val | BIT(port), coma_addr + RCDC); - } -} - -static int rswitch_bpool_config(struct rswitch_private *priv) -{ - u32 val; - - val = ioread32(priv->addr + CABPIRM); - if (val & CABPIRM_BPR) - return 0; - - iowrite32(CABPIRM_BPIOG, priv->addr + CABPIRM); - - return rswitch_reg_wait(priv->addr, CABPIRM, CABPIRM_BPR, CABPIRM_BPR); -} - -static void rswitch_coma_init(struct rswitch_private *priv) -{ - iowrite32(CABPPFLC_INIT_VALUE, priv->addr + CABPPFLC0); -} - -/* R-Switch-2 block (TOP) */ -static void rswitch_top_init(struct rswitch_private *priv) -{ - int i; - - for (i = 0; i < RSWITCH_MAX_NUM_QUEUES; i++) - iowrite32((i / 16) << (GWCA_INDEX * 8), priv->addr + TPEMIMC7(i)); -} - -/* Forwarding engine block (MFWD) */ -static void rswitch_fwd_init(struct rswitch_private *priv) -{ - int i; - - /* For ETHA */ - for (i = 0; i < RSWITCH_NUM_PORTS; i++) { - iowrite32(FWPC0_DEFAULT, priv->addr + FWPC0(i)); - iowrite32(0, priv->addr + FWPBFC(i)); - } - - for (i = 0; i < RSWITCH_NUM_PORTS; i++) { - iowrite32(priv->rdev[i]->rx_queue->index, - priv->addr + FWPBFCSDC(GWCA_INDEX, i)); - iowrite32(BIT(priv->gwca.index), priv->addr + FWPBFC(i)); - } - - /* For GWCA */ - iowrite32(FWPC0_DEFAULT, priv->addr + FWPC0(priv->gwca.index)); - iowrite32(FWPC1_DDE, priv->addr + FWPC1(priv->gwca.index)); - iowrite32(0, priv->addr + FWPBFC(priv->gwca.index)); - iowrite32(GENMASK(RSWITCH_NUM_PORTS - 1, 0), priv->addr + FWPBFC(priv->gwca.index)); -} - -/* Gateway CPU agent block (GWCA) */ -static int rswitch_gwca_change_mode(struct rswitch_private *priv, - enum rswitch_gwca_mode mode) -{ - int ret; - - if (!rswitch_agent_clock_is_enabled(priv->addr, priv->gwca.index)) - rswitch_agent_clock_ctrl(priv->addr, priv->gwca.index, 1); - - iowrite32(mode, priv->addr + GWMC); - - ret = rswitch_reg_wait(priv->addr, GWMS, GWMS_OPS_MASK, mode); - - if (mode == GWMC_OPC_DISABLE) - rswitch_agent_clock_ctrl(priv->addr, priv->gwca.index, 0); - - return ret; -} - -static int rswitch_gwca_mcast_table_reset(struct rswitch_private *priv) -{ - iowrite32(GWMTIRM_MTIOG, priv->addr + GWMTIRM); - - return rswitch_reg_wait(priv->addr, GWMTIRM, GWMTIRM_MTR, GWMTIRM_MTR); -} - -static int rswitch_gwca_axi_ram_reset(struct rswitch_private *priv) -{ - iowrite32(GWARIRM_ARIOG, priv->addr + GWARIRM); - - return rswitch_reg_wait(priv->addr, GWARIRM, GWARIRM_ARR, GWARIRM_ARR); -} - -static bool rswitch_is_any_data_irq(struct rswitch_private *priv, u32 *dis, bool tx) -{ - u32 *mask = tx ? priv->gwca.tx_irq_bits : priv->gwca.rx_irq_bits; - int i; - - for (i = 0; i < RSWITCH_NUM_IRQ_REGS; i++) { - if (dis[i] & mask[i]) - return true; - } - - return false; -} - -static void rswitch_get_data_irq_status(struct rswitch_private *priv, u32 *dis) -{ - int i; - - for (i = 0; i < RSWITCH_NUM_IRQ_REGS; i++) { - dis[i] = ioread32(priv->addr + GWDIS(i)); - dis[i] &= ioread32(priv->addr + GWDIE(i)); - } -} - -static void rswitch_enadis_data_irq(struct rswitch_private *priv, int index, bool enable) -{ - u32 offs = enable ? GWDIE(index / 32) : GWDID(index / 32); - - iowrite32(BIT(index % 32), priv->addr + offs); -} - -static void rswitch_ack_data_irq(struct rswitch_private *priv, int index) -{ - u32 offs = GWDIS(index / 32); - - iowrite32(BIT(index % 32), priv->addr + offs); -} - -static int rswitch_next_queue_index(struct rswitch_gwca_queue *gq, bool cur, int num) -{ - int index = cur ? gq->cur : gq->dirty; - - if (index + num >= gq->ring_size) - index = (index + num) % gq->ring_size; - else - index += num; - - return index; -} - -static int rswitch_get_num_cur_queues(struct rswitch_gwca_queue *gq) -{ - if (gq->cur >= gq->dirty) - return gq->cur - gq->dirty; - else - return gq->ring_size - gq->dirty + gq->cur; -} - -static bool rswitch_is_queue_rxed(struct rswitch_gwca_queue *gq) -{ - struct rswitch_ext_ts_desc *desc = &gq->rx_ring[gq->dirty]; - - if ((desc->desc.die_dt & DT_MASK) != DT_FEMPTY) - return true; - - return false; -} - -static int rswitch_gwca_queue_alloc_skb(struct rswitch_gwca_queue *gq, - int start_index, int num) -{ - int i, index; - - for (i = 0; i < num; i++) { - index = (i + start_index) % gq->ring_size; - if (gq->skbs[index]) - continue; - gq->skbs[index] = netdev_alloc_skb_ip_align(gq->ndev, - PKT_BUF_SZ + RSWITCH_ALIGN - 1); - if (!gq->skbs[index]) - goto err; - } - - return 0; - -err: - for (i--; i >= 0; i--) { - index = (i + start_index) % gq->ring_size; - dev_kfree_skb(gq->skbs[index]); - gq->skbs[index] = NULL; - } - - return -ENOMEM; -} - -static void rswitch_gwca_queue_free(struct net_device *ndev, - struct rswitch_gwca_queue *gq) -{ - int i; - - if (!gq->dir_tx) { - dma_free_coherent(ndev->dev.parent, - sizeof(struct rswitch_ext_ts_desc) * - (gq->ring_size + 1), gq->rx_ring, gq->ring_dma); - gq->rx_ring = NULL; - - for (i = 0; i < gq->ring_size; i++) - dev_kfree_skb(gq->skbs[i]); - } else { - dma_free_coherent(ndev->dev.parent, - sizeof(struct rswitch_ext_desc) * - (gq->ring_size + 1), gq->tx_ring, gq->ring_dma); - gq->tx_ring = NULL; - } - - kfree(gq->skbs); - gq->skbs = NULL; -} - -static void rswitch_gwca_ts_queue_free(struct rswitch_private *priv) -{ - struct rswitch_gwca_queue *gq = &priv->gwca.ts_queue; - - dma_free_coherent(&priv->pdev->dev, - sizeof(struct rswitch_ts_desc) * (gq->ring_size + 1), - gq->ts_ring, gq->ring_dma); - gq->ts_ring = NULL; -} - -static int rswitch_gwca_queue_alloc(struct net_device *ndev, - struct rswitch_private *priv, - struct rswitch_gwca_queue *gq, - bool dir_tx, int ring_size) -{ - int i, bit; - - gq->dir_tx = dir_tx; - gq->ring_size = ring_size; - gq->ndev = ndev; - - gq->skbs = kcalloc(gq->ring_size, sizeof(*gq->skbs), GFP_KERNEL); - if (!gq->skbs) - return -ENOMEM; - - if (!dir_tx) { - rswitch_gwca_queue_alloc_skb(gq, 0, gq->ring_size); - - gq->rx_ring = dma_alloc_coherent(ndev->dev.parent, - sizeof(struct rswitch_ext_ts_desc) * - (gq->ring_size + 1), &gq->ring_dma, GFP_KERNEL); - } else { - gq->tx_ring = dma_alloc_coherent(ndev->dev.parent, - sizeof(struct rswitch_ext_desc) * - (gq->ring_size + 1), &gq->ring_dma, GFP_KERNEL); - } - - if (!gq->rx_ring && !gq->tx_ring) - goto out; - - i = gq->index / 32; - bit = BIT(gq->index % 32); - if (dir_tx) - priv->gwca.tx_irq_bits[i] |= bit; - else - priv->gwca.rx_irq_bits[i] |= bit; - - return 0; - -out: - rswitch_gwca_queue_free(ndev, gq); - - return -ENOMEM; -} - -static void rswitch_desc_set_dptr(struct rswitch_desc *desc, dma_addr_t addr) -{ - desc->dptrl = cpu_to_le32(lower_32_bits(addr)); - desc->dptrh = upper_32_bits(addr) & 0xff; -} - -static dma_addr_t rswitch_desc_get_dptr(const struct rswitch_desc *desc) -{ - return __le32_to_cpu(desc->dptrl) | (u64)(desc->dptrh) << 32; -} - -static int rswitch_gwca_queue_format(struct net_device *ndev, - struct rswitch_private *priv, - struct rswitch_gwca_queue *gq) -{ - int ring_size = sizeof(struct rswitch_ext_desc) * gq->ring_size; - struct rswitch_ext_desc *desc; - struct rswitch_desc *linkfix; - dma_addr_t dma_addr; - int i; - - memset(gq->tx_ring, 0, ring_size); - for (i = 0, desc = gq->tx_ring; i < gq->ring_size; i++, desc++) { - if (!gq->dir_tx) { - dma_addr = dma_map_single(ndev->dev.parent, - gq->skbs[i]->data, PKT_BUF_SZ, - DMA_FROM_DEVICE); - if (dma_mapping_error(ndev->dev.parent, dma_addr)) - goto err; - - desc->desc.info_ds = cpu_to_le16(PKT_BUF_SZ); - rswitch_desc_set_dptr(&desc->desc, dma_addr); - desc->desc.die_dt = DT_FEMPTY | DIE; - } else { - desc->desc.die_dt = DT_EEMPTY | DIE; - } - } - rswitch_desc_set_dptr(&desc->desc, gq->ring_dma); - desc->desc.die_dt = DT_LINKFIX; - - linkfix = &priv->gwca.linkfix_table[gq->index]; - linkfix->die_dt = DT_LINKFIX; - rswitch_desc_set_dptr(linkfix, gq->ring_dma); - - iowrite32(GWDCC_BALR | (gq->dir_tx ? GWDCC_DCP(GWCA_IPV_NUM) | GWDCC_DQT : 0) | GWDCC_EDE, - priv->addr + GWDCC_OFFS(gq->index)); - - return 0; - -err: - if (!gq->dir_tx) { - for (i--, desc = gq->tx_ring; i >= 0; i--, desc++) { - dma_addr = rswitch_desc_get_dptr(&desc->desc); - dma_unmap_single(ndev->dev.parent, dma_addr, PKT_BUF_SZ, - DMA_FROM_DEVICE); - } - } - - return -ENOMEM; -} - -static void rswitch_gwca_ts_queue_fill(struct rswitch_private *priv, - int start_index, int num) -{ - struct rswitch_gwca_queue *gq = &priv->gwca.ts_queue; - struct rswitch_ts_desc *desc; - int i, index; - - for (i = 0; i < num; i++) { - index = (i + start_index) % gq->ring_size; - desc = &gq->ts_ring[index]; - desc->desc.die_dt = DT_FEMPTY_ND | DIE; - } -} - -static int rswitch_gwca_queue_ext_ts_fill(struct net_device *ndev, - struct rswitch_gwca_queue *gq, - int start_index, int num) -{ - struct rswitch_device *rdev = netdev_priv(ndev); - struct rswitch_ext_ts_desc *desc; - dma_addr_t dma_addr; - int i, index; - - for (i = 0; i < num; i++) { - index = (i + start_index) % gq->ring_size; - desc = &gq->rx_ring[index]; - if (!gq->dir_tx) { - dma_addr = dma_map_single(ndev->dev.parent, - gq->skbs[index]->data, PKT_BUF_SZ, - DMA_FROM_DEVICE); - if (dma_mapping_error(ndev->dev.parent, dma_addr)) - goto err; - - desc->desc.info_ds = cpu_to_le16(PKT_BUF_SZ); - rswitch_desc_set_dptr(&desc->desc, dma_addr); - dma_wmb(); - desc->desc.die_dt = DT_FEMPTY | DIE; - desc->info1 = cpu_to_le64(INFO1_SPN(rdev->etha->index)); - } else { - desc->desc.die_dt = DT_EEMPTY | DIE; - } - } - - return 0; - -err: - if (!gq->dir_tx) { - for (i--; i >= 0; i--) { - index = (i + start_index) % gq->ring_size; - desc = &gq->rx_ring[index]; - dma_addr = rswitch_desc_get_dptr(&desc->desc); - dma_unmap_single(ndev->dev.parent, dma_addr, PKT_BUF_SZ, - DMA_FROM_DEVICE); - } - } - - return -ENOMEM; -} - -static int rswitch_gwca_queue_ext_ts_format(struct net_device *ndev, - struct rswitch_private *priv, - struct rswitch_gwca_queue *gq) -{ - int ring_size = sizeof(struct rswitch_ext_ts_desc) * gq->ring_size; - struct rswitch_ext_ts_desc *desc; - struct rswitch_desc *linkfix; - int err; - - memset(gq->rx_ring, 0, ring_size); - err = rswitch_gwca_queue_ext_ts_fill(ndev, gq, 0, gq->ring_size); - if (err < 0) - return err; - - desc = &gq->rx_ring[gq->ring_size]; /* Last */ - rswitch_desc_set_dptr(&desc->desc, gq->ring_dma); - desc->desc.die_dt = DT_LINKFIX; - - linkfix = &priv->gwca.linkfix_table[gq->index]; - linkfix->die_dt = DT_LINKFIX; - rswitch_desc_set_dptr(linkfix, gq->ring_dma); - - iowrite32(GWDCC_BALR | (gq->dir_tx ? GWDCC_DCP(GWCA_IPV_NUM) | GWDCC_DQT : 0) | - GWDCC_ETS | GWDCC_EDE, - priv->addr + GWDCC_OFFS(gq->index)); - - return 0; -} - -static int rswitch_gwca_linkfix_alloc(struct rswitch_private *priv) -{ - int i, num_queues = priv->gwca.num_queues; - struct rswitch_gwca *gwca = &priv->gwca; - struct device *dev = &priv->pdev->dev; - - gwca->linkfix_table_size = sizeof(struct rswitch_desc) * num_queues; - gwca->linkfix_table = dma_alloc_coherent(dev, gwca->linkfix_table_size, - &gwca->linkfix_table_dma, GFP_KERNEL); - if (!gwca->linkfix_table) - return -ENOMEM; - for (i = 0; i < num_queues; i++) - gwca->linkfix_table[i].die_dt = DT_EOS; - - return 0; -} - -static void rswitch_gwca_linkfix_free(struct rswitch_private *priv) -{ - struct rswitch_gwca *gwca = &priv->gwca; - - if (gwca->linkfix_table) - dma_free_coherent(&priv->pdev->dev, gwca->linkfix_table_size, - gwca->linkfix_table, gwca->linkfix_table_dma); - gwca->linkfix_table = NULL; -} - -static int rswitch_gwca_ts_queue_alloc(struct rswitch_private *priv) -{ - struct rswitch_gwca_queue *gq = &priv->gwca.ts_queue; - struct rswitch_ts_desc *desc; - - gq->ring_size = TS_RING_SIZE; - gq->ts_ring = dma_alloc_coherent(&priv->pdev->dev, - sizeof(struct rswitch_ts_desc) * - (gq->ring_size + 1), &gq->ring_dma, GFP_KERNEL); - - if (!gq->ts_ring) - return -ENOMEM; - - rswitch_gwca_ts_queue_fill(priv, 0, TS_RING_SIZE); - desc = &gq->ts_ring[gq->ring_size]; - desc->desc.die_dt = DT_LINKFIX; - rswitch_desc_set_dptr(&desc->desc, gq->ring_dma); - INIT_LIST_HEAD(&priv->gwca.ts_info_list); - - return 0; -} - -static struct rswitch_gwca_queue *rswitch_gwca_get(struct rswitch_private *priv) -{ - struct rswitch_gwca_queue *gq; - int index; - - index = find_first_zero_bit(priv->gwca.used, priv->gwca.num_queues); - if (index >= priv->gwca.num_queues) - return NULL; - set_bit(index, priv->gwca.used); - gq = &priv->gwca.queues[index]; - memset(gq, 0, sizeof(*gq)); - gq->index = index; - - return gq; -} - -static void rswitch_gwca_put(struct rswitch_private *priv, - struct rswitch_gwca_queue *gq) -{ - clear_bit(gq->index, priv->gwca.used); -} - -static int rswitch_txdmac_alloc(struct net_device *ndev) -{ - struct rswitch_device *rdev = netdev_priv(ndev); - struct rswitch_private *priv = rdev->priv; - int err; - - rdev->tx_queue = rswitch_gwca_get(priv); - if (!rdev->tx_queue) - return -EBUSY; - - err = rswitch_gwca_queue_alloc(ndev, priv, rdev->tx_queue, true, TX_RING_SIZE); - if (err < 0) { - rswitch_gwca_put(priv, rdev->tx_queue); - return err; - } - - return 0; -} - -static void rswitch_txdmac_free(struct net_device *ndev) -{ - struct rswitch_device *rdev = netdev_priv(ndev); - - rswitch_gwca_queue_free(ndev, rdev->tx_queue); - rswitch_gwca_put(rdev->priv, rdev->tx_queue); -} - -static int rswitch_txdmac_init(struct rswitch_private *priv, int index) -{ - struct rswitch_device *rdev = priv->rdev[index]; - - return rswitch_gwca_queue_format(rdev->ndev, priv, rdev->tx_queue); -} - -static int rswitch_rxdmac_alloc(struct net_device *ndev) -{ - struct rswitch_device *rdev = netdev_priv(ndev); - struct rswitch_private *priv = rdev->priv; - int err; - - rdev->rx_queue = rswitch_gwca_get(priv); - if (!rdev->rx_queue) - return -EBUSY; - - err = rswitch_gwca_queue_alloc(ndev, priv, rdev->rx_queue, false, RX_RING_SIZE); - if (err < 0) { - rswitch_gwca_put(priv, rdev->rx_queue); - return err; - } - - return 0; -} - -static void rswitch_rxdmac_free(struct net_device *ndev) -{ - struct rswitch_device *rdev = netdev_priv(ndev); - - rswitch_gwca_queue_free(ndev, rdev->rx_queue); - rswitch_gwca_put(rdev->priv, rdev->rx_queue); -} - -static int rswitch_rxdmac_init(struct rswitch_private *priv, int index) -{ - struct rswitch_device *rdev = priv->rdev[index]; - struct net_device *ndev = rdev->ndev; - - return rswitch_gwca_queue_ext_ts_format(ndev, priv, rdev->rx_queue); -} - -static int rswitch_gwca_hw_init(struct rswitch_private *priv) -{ - int i, err; - - err = rswitch_gwca_change_mode(priv, GWMC_OPC_DISABLE); - if (err < 0) - return err; - err = rswitch_gwca_change_mode(priv, GWMC_OPC_CONFIG); - if (err < 0) - return err; - - err = rswitch_gwca_mcast_table_reset(priv); - if (err < 0) - return err; - err = rswitch_gwca_axi_ram_reset(priv); - if (err < 0) - return err; - - iowrite32(GWVCC_VEM_SC_TAG, priv->addr + GWVCC); - iowrite32(0, priv->addr + GWTTFC); - iowrite32(lower_32_bits(priv->gwca.linkfix_table_dma), priv->addr + GWDCBAC1); - iowrite32(upper_32_bits(priv->gwca.linkfix_table_dma), priv->addr + GWDCBAC0); - iowrite32(lower_32_bits(priv->gwca.ts_queue.ring_dma), priv->addr + GWTDCAC10); - iowrite32(upper_32_bits(priv->gwca.ts_queue.ring_dma), priv->addr + GWTDCAC00); - iowrite32(GWCA_TS_IRQ_BIT, priv->addr + GWTSDCC0); - - iowrite32(GWTPC_PPPL(GWCA_IPV_NUM), priv->addr + GWTPC0); - - for (i = 0; i < RSWITCH_NUM_PORTS; i++) { - err = rswitch_rxdmac_init(priv, i); - if (err < 0) - return err; - err = rswitch_txdmac_init(priv, i); - if (err < 0) - return err; - } - - err = rswitch_gwca_change_mode(priv, GWMC_OPC_DISABLE); - if (err < 0) - return err; - return rswitch_gwca_change_mode(priv, GWMC_OPC_OPERATION); -} - -static int rswitch_gwca_hw_deinit(struct rswitch_private *priv) -{ - int err; - - err = rswitch_gwca_change_mode(priv, GWMC_OPC_DISABLE); - if (err < 0) - return err; - err = rswitch_gwca_change_mode(priv, GWMC_OPC_RESET); - if (err < 0) - return err; - - return rswitch_gwca_change_mode(priv, GWMC_OPC_DISABLE); -} - -static int rswitch_gwca_halt(struct rswitch_private *priv) -{ - int err; - - priv->gwca_halt = true; - err = rswitch_gwca_hw_deinit(priv); - dev_err(&priv->pdev->dev, "halted (%d)\n", err); - - return err; -} - -static bool rswitch_rx(struct net_device *ndev, int *quota) -{ - struct rswitch_device *rdev = netdev_priv(ndev); - struct rswitch_gwca_queue *gq = rdev->rx_queue; - struct rswitch_ext_ts_desc *desc; - int limit, boguscnt, num, ret; - struct sk_buff *skb; - dma_addr_t dma_addr; - u16 pkt_len; - u32 get_ts; - - if (*quota <= 0) - return true; - - boguscnt = min_t(int, gq->ring_size, *quota); - limit = boguscnt; - - desc = &gq->rx_ring[gq->cur]; - while ((desc->desc.die_dt & DT_MASK) != DT_FEMPTY) { - dma_rmb(); - pkt_len = le16_to_cpu(desc->desc.info_ds) & RX_DS; - skb = gq->skbs[gq->cur]; - gq->skbs[gq->cur] = NULL; - dma_addr = rswitch_desc_get_dptr(&desc->desc); - dma_unmap_single(ndev->dev.parent, dma_addr, PKT_BUF_SZ, DMA_FROM_DEVICE); - get_ts = rdev->priv->ptp_priv->tstamp_rx_ctrl & RCAR_GEN4_RXTSTAMP_TYPE_V2_L2_EVENT; - if (get_ts) { - struct skb_shared_hwtstamps *shhwtstamps; - struct timespec64 ts; - - shhwtstamps = skb_hwtstamps(skb); - memset(shhwtstamps, 0, sizeof(*shhwtstamps)); - ts.tv_sec = __le32_to_cpu(desc->ts_sec); - ts.tv_nsec = __le32_to_cpu(desc->ts_nsec & cpu_to_le32(0x3fffffff)); - shhwtstamps->hwtstamp = timespec64_to_ktime(ts); - } - skb_put(skb, pkt_len); - skb->protocol = eth_type_trans(skb, ndev); - napi_gro_receive(&rdev->napi, skb); - rdev->ndev->stats.rx_packets++; - rdev->ndev->stats.rx_bytes += pkt_len; - - gq->cur = rswitch_next_queue_index(gq, true, 1); - desc = &gq->rx_ring[gq->cur]; - - if (--boguscnt <= 0) - break; - } - - num = rswitch_get_num_cur_queues(gq); - ret = rswitch_gwca_queue_alloc_skb(gq, gq->dirty, num); - if (ret < 0) - goto err; - ret = rswitch_gwca_queue_ext_ts_fill(ndev, gq, gq->dirty, num); - if (ret < 0) - goto err; - gq->dirty = rswitch_next_queue_index(gq, false, num); - - *quota -= limit - boguscnt; - - return boguscnt <= 0; - -err: - rswitch_gwca_halt(rdev->priv); - - return 0; -} - -static int rswitch_tx_free(struct net_device *ndev, bool free_txed_only) -{ - struct rswitch_device *rdev = netdev_priv(ndev); - struct rswitch_gwca_queue *gq = rdev->tx_queue; - struct rswitch_ext_desc *desc; - dma_addr_t dma_addr; - struct sk_buff *skb; - int free_num = 0; - int size; - - for (; rswitch_get_num_cur_queues(gq) > 0; - gq->dirty = rswitch_next_queue_index(gq, false, 1)) { - desc = &gq->tx_ring[gq->dirty]; - if (free_txed_only && (desc->desc.die_dt & DT_MASK) != DT_FEMPTY) - break; - - dma_rmb(); - size = le16_to_cpu(desc->desc.info_ds) & TX_DS; - skb = gq->skbs[gq->dirty]; - if (skb) { - dma_addr = rswitch_desc_get_dptr(&desc->desc); - dma_unmap_single(ndev->dev.parent, dma_addr, - size, DMA_TO_DEVICE); - dev_kfree_skb_any(gq->skbs[gq->dirty]); - gq->skbs[gq->dirty] = NULL; - free_num++; - } - desc->desc.die_dt = DT_EEMPTY; - rdev->ndev->stats.tx_packets++; - rdev->ndev->stats.tx_bytes += size; - } - - return free_num; -} - -static int rswitch_poll(struct napi_struct *napi, int budget) -{ - struct net_device *ndev = napi->dev; - struct rswitch_private *priv; - struct rswitch_device *rdev; - int quota = budget; - - rdev = netdev_priv(ndev); - priv = rdev->priv; - -retry: - rswitch_tx_free(ndev, true); - - if (rswitch_rx(ndev, "a)) - goto out; - else if (rdev->priv->gwca_halt) - goto err; - else if (rswitch_is_queue_rxed(rdev->rx_queue)) - goto retry; - - netif_wake_subqueue(ndev, 0); - - napi_complete(napi); - - rswitch_enadis_data_irq(priv, rdev->tx_queue->index, true); - rswitch_enadis_data_irq(priv, rdev->rx_queue->index, true); - -out: - return budget - quota; - -err: - napi_complete(napi); - - return 0; -} - -static void rswitch_queue_interrupt(struct net_device *ndev) -{ - struct rswitch_device *rdev = netdev_priv(ndev); - - if (napi_schedule_prep(&rdev->napi)) { - rswitch_enadis_data_irq(rdev->priv, rdev->tx_queue->index, false); - rswitch_enadis_data_irq(rdev->priv, rdev->rx_queue->index, false); - __napi_schedule(&rdev->napi); - } -} - -static irqreturn_t rswitch_data_irq(struct rswitch_private *priv, u32 *dis) -{ - struct rswitch_gwca_queue *gq; - int i, index, bit; - - for (i = 0; i < priv->gwca.num_queues; i++) { - gq = &priv->gwca.queues[i]; - index = gq->index / 32; - bit = BIT(gq->index % 32); - if (!(dis[index] & bit)) - continue; - - rswitch_ack_data_irq(priv, gq->index); - rswitch_queue_interrupt(gq->ndev); - } - - return IRQ_HANDLED; -} - -static irqreturn_t rswitch_gwca_irq(int irq, void *dev_id) -{ - struct rswitch_private *priv = dev_id; - u32 dis[RSWITCH_NUM_IRQ_REGS]; - irqreturn_t ret = IRQ_NONE; - - rswitch_get_data_irq_status(priv, dis); - - if (rswitch_is_any_data_irq(priv, dis, true) || - rswitch_is_any_data_irq(priv, dis, false)) - ret = rswitch_data_irq(priv, dis); - - return ret; -} - -static int rswitch_gwca_request_irqs(struct rswitch_private *priv) -{ - char *resource_name, *irq_name; - int i, ret, irq; - - for (i = 0; i < GWCA_NUM_IRQS; i++) { - resource_name = kasprintf(GFP_KERNEL, GWCA_IRQ_RESOURCE_NAME, i); - if (!resource_name) - return -ENOMEM; - - irq = platform_get_irq_byname(priv->pdev, resource_name); - kfree(resource_name); - if (irq < 0) - return irq; - - irq_name = devm_kasprintf(&priv->pdev->dev, GFP_KERNEL, - GWCA_IRQ_NAME, i); - if (!irq_name) - return -ENOMEM; - - ret = devm_request_irq(&priv->pdev->dev, irq, rswitch_gwca_irq, - 0, irq_name, priv); - if (ret < 0) - return ret; - } - - return 0; -} - -static void rswitch_ts(struct rswitch_private *priv) -{ - struct rswitch_gwca_queue *gq = &priv->gwca.ts_queue; - struct rswitch_gwca_ts_info *ts_info, *ts_info2; - struct skb_shared_hwtstamps shhwtstamps; - struct rswitch_ts_desc *desc; - struct timespec64 ts; - u32 tag, port; - int num; - - desc = &gq->ts_ring[gq->cur]; - while ((desc->desc.die_dt & DT_MASK) != DT_FEMPTY_ND) { - dma_rmb(); - - port = TS_DESC_DPN(__le32_to_cpu(desc->desc.dptrl)); - tag = TS_DESC_TSUN(__le32_to_cpu(desc->desc.dptrl)); - - list_for_each_entry_safe(ts_info, ts_info2, &priv->gwca.ts_info_list, list) { - if (!(ts_info->port == port && ts_info->tag == tag)) - continue; - - memset(&shhwtstamps, 0, sizeof(shhwtstamps)); - ts.tv_sec = __le32_to_cpu(desc->ts_sec); - ts.tv_nsec = __le32_to_cpu(desc->ts_nsec & cpu_to_le32(0x3fffffff)); - shhwtstamps.hwtstamp = timespec64_to_ktime(ts); - skb_tstamp_tx(ts_info->skb, &shhwtstamps); - dev_consume_skb_irq(ts_info->skb); - list_del(&ts_info->list); - kfree(ts_info); - break; - } - - gq->cur = rswitch_next_queue_index(gq, true, 1); - desc = &gq->ts_ring[gq->cur]; - } - - num = rswitch_get_num_cur_queues(gq); - rswitch_gwca_ts_queue_fill(priv, gq->dirty, num); - gq->dirty = rswitch_next_queue_index(gq, false, num); -} - -static irqreturn_t rswitch_gwca_ts_irq(int irq, void *dev_id) -{ - struct rswitch_private *priv = dev_id; - - if (ioread32(priv->addr + GWTSDIS) & GWCA_TS_IRQ_BIT) { - iowrite32(GWCA_TS_IRQ_BIT, priv->addr + GWTSDIS); - rswitch_ts(priv); - - return IRQ_HANDLED; - } - - return IRQ_NONE; -} - -static int rswitch_gwca_ts_request_irqs(struct rswitch_private *priv) -{ - int irq; - - irq = platform_get_irq_byname(priv->pdev, GWCA_TS_IRQ_RESOURCE_NAME); - if (irq < 0) - return irq; - - return devm_request_irq(&priv->pdev->dev, irq, rswitch_gwca_ts_irq, - 0, GWCA_TS_IRQ_NAME, priv); -} - -/* Ethernet TSN Agent block (ETHA) and Ethernet MAC IP block (RMAC) */ -static int rswitch_etha_change_mode(struct rswitch_etha *etha, - enum rswitch_etha_mode mode) -{ - int ret; - - if (!rswitch_agent_clock_is_enabled(etha->coma_addr, etha->index)) - rswitch_agent_clock_ctrl(etha->coma_addr, etha->index, 1); - - iowrite32(mode, etha->addr + EAMC); - - ret = rswitch_reg_wait(etha->addr, EAMS, EAMS_OPS_MASK, mode); - - if (mode == EAMC_OPC_DISABLE) - rswitch_agent_clock_ctrl(etha->coma_addr, etha->index, 0); - - return ret; -} - -static void rswitch_etha_read_mac_address(struct rswitch_etha *etha) -{ - u32 mrmac0 = ioread32(etha->addr + MRMAC0); - u32 mrmac1 = ioread32(etha->addr + MRMAC1); - u8 *mac = ða->mac_addr[0]; - - mac[0] = (mrmac0 >> 8) & 0xFF; - mac[1] = (mrmac0 >> 0) & 0xFF; - mac[2] = (mrmac1 >> 24) & 0xFF; - mac[3] = (mrmac1 >> 16) & 0xFF; - mac[4] = (mrmac1 >> 8) & 0xFF; - mac[5] = (mrmac1 >> 0) & 0xFF; -} - -static void rswitch_etha_write_mac_address(struct rswitch_etha *etha, const u8 *mac) -{ - iowrite32((mac[0] << 8) | mac[1], etha->addr + MRMAC0); - iowrite32((mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | mac[5], - etha->addr + MRMAC1); -} - -static int rswitch_etha_wait_link_verification(struct rswitch_etha *etha) -{ - iowrite32(MLVC_PLV, etha->addr + MLVC); - - return rswitch_reg_wait(etha->addr, MLVC, MLVC_PLV, 0); -} - -static void rswitch_rmac_setting(struct rswitch_etha *etha, const u8 *mac) -{ - u32 val; - - rswitch_etha_write_mac_address(etha, mac); - - switch (etha->speed) { - case 100: - val = MPIC_LSC_100M; - break; - case 1000: - val = MPIC_LSC_1G; - break; - case 2500: - val = MPIC_LSC_2_5G; - break; - default: - return; - } - - iowrite32(MPIC_PIS_GMII | val, etha->addr + MPIC); -} - -static void rswitch_etha_enable_mii(struct rswitch_etha *etha) -{ - rswitch_modify(etha->addr, MPIC, MPIC_PSMCS_MASK | MPIC_PSMHT_MASK, - MPIC_PSMCS(0x05) | MPIC_PSMHT(0x06)); - rswitch_modify(etha->addr, MPSM, 0, MPSM_MFF_C45); -} - -static int rswitch_etha_hw_init(struct rswitch_etha *etha, const u8 *mac) -{ - int err; - - err = rswitch_etha_change_mode(etha, EAMC_OPC_DISABLE); - if (err < 0) - return err; - err = rswitch_etha_change_mode(etha, EAMC_OPC_CONFIG); - if (err < 0) - return err; - - iowrite32(EAVCC_VEM_SC_TAG, etha->addr + EAVCC); - rswitch_rmac_setting(etha, mac); - rswitch_etha_enable_mii(etha); - - err = rswitch_etha_wait_link_verification(etha); - if (err < 0) - return err; - - err = rswitch_etha_change_mode(etha, EAMC_OPC_DISABLE); - if (err < 0) - return err; - - return rswitch_etha_change_mode(etha, EAMC_OPC_OPERATION); -} - -static int rswitch_etha_set_access(struct rswitch_etha *etha, bool read, - int phyad, int devad, int regad, int data) -{ - int pop = read ? MDIO_READ_C45 : MDIO_WRITE_C45; - u32 val; - int ret; - - if (devad == 0xffffffff) - return -ENODEV; - - writel(MMIS1_CLEAR_FLAGS, etha->addr + MMIS1); - - val = MPSM_PSME | MPSM_MFF_C45; - iowrite32((regad << 16) | (devad << 8) | (phyad << 3) | val, etha->addr + MPSM); - - ret = rswitch_reg_wait(etha->addr, MMIS1, MMIS1_PAACS, MMIS1_PAACS); - if (ret) - return ret; - - rswitch_modify(etha->addr, MMIS1, MMIS1_PAACS, MMIS1_PAACS); - - if (read) { - writel((pop << 13) | (devad << 8) | (phyad << 3) | val, etha->addr + MPSM); - - ret = rswitch_reg_wait(etha->addr, MMIS1, MMIS1_PRACS, MMIS1_PRACS); - if (ret) - return ret; - - ret = (ioread32(etha->addr + MPSM) & MPSM_PRD_MASK) >> 16; - - rswitch_modify(etha->addr, MMIS1, MMIS1_PRACS, MMIS1_PRACS); - } else { - iowrite32((data << 16) | (pop << 13) | (devad << 8) | (phyad << 3) | val, - etha->addr + MPSM); - - ret = rswitch_reg_wait(etha->addr, MMIS1, MMIS1_PWACS, MMIS1_PWACS); - } - - return ret; -} - -static int rswitch_etha_mii_read_c45(struct mii_bus *bus, int addr, int devad, - int regad) -{ - struct rswitch_etha *etha = bus->priv; - - return rswitch_etha_set_access(etha, true, addr, devad, regad, 0); -} - -static int rswitch_etha_mii_write_c45(struct mii_bus *bus, int addr, int devad, - int regad, u16 val) -{ - struct rswitch_etha *etha = bus->priv; - - return rswitch_etha_set_access(etha, false, addr, devad, regad, val); -} - -/* Call of_node_put(port) after done */ -static struct device_node *rswitch_get_port_node(struct rswitch_device *rdev) -{ - struct device_node *ports, *port; - int err = 0; - u32 index; - - ports = of_get_child_by_name(rdev->ndev->dev.parent->of_node, - "ethernet-ports"); - if (!ports) - return NULL; - - for_each_child_of_node(ports, port) { - err = of_property_read_u32(port, "reg", &index); - if (err < 0) { - port = NULL; - goto out; - } - if (index == rdev->etha->index) { - if (!of_device_is_available(port)) - port = NULL; - break; - } - } - -out: - of_node_put(ports); - - return port; -} - -static int rswitch_etha_get_params(struct rswitch_device *rdev) -{ - u32 max_speed; - int err; - - if (!rdev->np_port) - return 0; /* ignored */ - - err = of_get_phy_mode(rdev->np_port, &rdev->etha->phy_interface); - if (err) - return err; - - err = of_property_read_u32(rdev->np_port, "max-speed", &max_speed); - if (!err) { - rdev->etha->speed = max_speed; - return 0; - } - - /* if no "max-speed" property, let's use default speed */ - switch (rdev->etha->phy_interface) { - case PHY_INTERFACE_MODE_MII: - rdev->etha->speed = SPEED_100; - break; - case PHY_INTERFACE_MODE_SGMII: - rdev->etha->speed = SPEED_1000; - break; - case PHY_INTERFACE_MODE_USXGMII: - rdev->etha->speed = SPEED_2500; - break; - default: - return -EINVAL; - } - - return 0; -} - -static int rswitch_mii_register(struct rswitch_device *rdev) -{ - struct device_node *mdio_np; - struct mii_bus *mii_bus; - int err; - - mii_bus = mdiobus_alloc(); - if (!mii_bus) - return -ENOMEM; - - mii_bus->name = "rswitch_mii"; - sprintf(mii_bus->id, "etha%d", rdev->etha->index); - mii_bus->priv = rdev->etha; - mii_bus->read_c45 = rswitch_etha_mii_read_c45; - mii_bus->write_c45 = rswitch_etha_mii_write_c45; - mii_bus->parent = &rdev->priv->pdev->dev; - - mdio_np = of_get_child_by_name(rdev->np_port, "mdio"); - err = of_mdiobus_register(mii_bus, mdio_np); - if (err < 0) { - mdiobus_free(mii_bus); - goto out; - } - - rdev->etha->mii = mii_bus; - -out: - of_node_put(mdio_np); - - return err; -} - -static void rswitch_mii_unregister(struct rswitch_device *rdev) -{ - if (rdev->etha->mii) { - mdiobus_unregister(rdev->etha->mii); - mdiobus_free(rdev->etha->mii); - rdev->etha->mii = NULL; - } -} - -static void rswitch_adjust_link(struct net_device *ndev) -{ - struct rswitch_device *rdev = netdev_priv(ndev); - struct phy_device *phydev = ndev->phydev; - - /* Current hardware has a restriction not to change speed at runtime */ - if (phydev->link != rdev->etha->link) { - phy_print_status(phydev); - if (phydev->link) - phy_power_on(rdev->serdes); - else - phy_power_off(rdev->serdes); - - rdev->etha->link = phydev->link; - } -} - -static void rswitch_phy_remove_link_mode(struct rswitch_device *rdev, - struct phy_device *phydev) -{ - /* Current hardware has a restriction not to change speed at runtime */ - switch (rdev->etha->speed) { - case SPEED_2500: - phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Full_BIT); - phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_100baseT_Full_BIT); - break; - case SPEED_1000: - phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_2500baseX_Full_BIT); - phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_100baseT_Full_BIT); - break; - case SPEED_100: - phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_2500baseX_Full_BIT); - phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Full_BIT); - break; - default: - break; - } - - phy_set_max_speed(phydev, rdev->etha->speed); -} - -static int rswitch_phy_device_init(struct rswitch_device *rdev) -{ - struct phy_device *phydev; - struct device_node *phy; - int err = -ENOENT; - - if (!rdev->np_port) - return -ENODEV; - - phy = of_parse_phandle(rdev->np_port, "phy-handle", 0); - if (!phy) - return -ENODEV; - - /* Set phydev->host_interfaces before calling of_phy_connect() to - * configure the PHY with the information of host_interfaces. - */ - phydev = of_phy_find_device(phy); - if (!phydev) - goto out; - __set_bit(rdev->etha->phy_interface, phydev->host_interfaces); - - phydev = of_phy_connect(rdev->ndev, phy, rswitch_adjust_link, 0, - rdev->etha->phy_interface); - if (!phydev) - goto out; - - phy_set_max_speed(phydev, SPEED_2500); - phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_10baseT_Half_BIT); - phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_10baseT_Full_BIT); - phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_100baseT_Half_BIT); - phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT); - rswitch_phy_remove_link_mode(rdev, phydev); - - phy_attached_info(phydev); - - err = 0; -out: - of_node_put(phy); - - return err; -} - -static void rswitch_phy_device_deinit(struct rswitch_device *rdev) -{ - if (rdev->ndev->phydev) - phy_disconnect(rdev->ndev->phydev); -} - -static int rswitch_serdes_set_params(struct rswitch_device *rdev) -{ - int err; - - err = phy_set_mode_ext(rdev->serdes, PHY_MODE_ETHERNET, - rdev->etha->phy_interface); - if (err < 0) - return err; - - return phy_set_speed(rdev->serdes, rdev->etha->speed); -} - -static int rswitch_ether_port_init_one(struct rswitch_device *rdev) -{ - int err; - - if (!rdev->etha->operated) { - err = rswitch_etha_hw_init(rdev->etha, rdev->ndev->dev_addr); - if (err < 0) - return err; - rdev->etha->operated = true; - } - - err = rswitch_mii_register(rdev); - if (err < 0) - return err; - - err = rswitch_phy_device_init(rdev); - if (err < 0) - goto err_phy_device_init; - - rdev->serdes = devm_of_phy_get(&rdev->priv->pdev->dev, rdev->np_port, NULL); - if (IS_ERR(rdev->serdes)) { - err = PTR_ERR(rdev->serdes); - goto err_serdes_phy_get; - } - - err = rswitch_serdes_set_params(rdev); - if (err < 0) - goto err_serdes_set_params; - - return 0; - -err_serdes_set_params: -err_serdes_phy_get: - rswitch_phy_device_deinit(rdev); - -err_phy_device_init: - rswitch_mii_unregister(rdev); - - return err; -} - -static void rswitch_ether_port_deinit_one(struct rswitch_device *rdev) -{ - rswitch_phy_device_deinit(rdev); - rswitch_mii_unregister(rdev); -} - -static int rswitch_ether_port_init_all(struct rswitch_private *priv) -{ - int i, err; - - rswitch_for_each_enabled_port(priv, i) { - err = rswitch_ether_port_init_one(priv->rdev[i]); - if (err) - goto err_init_one; - } - - rswitch_for_each_enabled_port(priv, i) { - err = phy_init(priv->rdev[i]->serdes); - if (err) - goto err_serdes; - } - - return 0; - -err_serdes: - rswitch_for_each_enabled_port_continue_reverse(priv, i) - phy_exit(priv->rdev[i]->serdes); - i = RSWITCH_NUM_PORTS; - -err_init_one: - rswitch_for_each_enabled_port_continue_reverse(priv, i) - rswitch_ether_port_deinit_one(priv->rdev[i]); - - return err; -} - -static void rswitch_ether_port_deinit_all(struct rswitch_private *priv) -{ - int i; - - for (i = 0; i < RSWITCH_NUM_PORTS; i++) { - phy_exit(priv->rdev[i]->serdes); - rswitch_ether_port_deinit_one(priv->rdev[i]); - } -} - -static int rswitch_open(struct net_device *ndev) -{ - struct rswitch_device *rdev = netdev_priv(ndev); - - phy_start(ndev->phydev); - - napi_enable(&rdev->napi); - netif_start_queue(ndev); - - rswitch_enadis_data_irq(rdev->priv, rdev->tx_queue->index, true); - rswitch_enadis_data_irq(rdev->priv, rdev->rx_queue->index, true); - - if (bitmap_empty(rdev->priv->opened_ports, RSWITCH_NUM_PORTS)) - iowrite32(GWCA_TS_IRQ_BIT, rdev->priv->addr + GWTSDIE); - - bitmap_set(rdev->priv->opened_ports, rdev->port, 1); - - return 0; -}; - -static int rswitch_stop(struct net_device *ndev) -{ - struct rswitch_device *rdev = netdev_priv(ndev); - struct rswitch_gwca_ts_info *ts_info, *ts_info2; - - netif_tx_stop_all_queues(ndev); - bitmap_clear(rdev->priv->opened_ports, rdev->port, 1); - - if (bitmap_empty(rdev->priv->opened_ports, RSWITCH_NUM_PORTS)) - iowrite32(GWCA_TS_IRQ_BIT, rdev->priv->addr + GWTSDID); - - list_for_each_entry_safe(ts_info, ts_info2, &rdev->priv->gwca.ts_info_list, list) { - if (ts_info->port != rdev->port) - continue; - dev_kfree_skb_irq(ts_info->skb); - list_del(&ts_info->list); - kfree(ts_info); - } - - rswitch_enadis_data_irq(rdev->priv, rdev->tx_queue->index, false); - rswitch_enadis_data_irq(rdev->priv, rdev->rx_queue->index, false); - - phy_stop(ndev->phydev); - napi_disable(&rdev->napi); - - return 0; -}; - -static netdev_tx_t rswitch_start_xmit(struct sk_buff *skb, struct net_device *ndev) -{ - struct rswitch_device *rdev = netdev_priv(ndev); - struct rswitch_gwca_queue *gq = rdev->tx_queue; - struct rswitch_ext_desc *desc; - int ret = NETDEV_TX_OK; - dma_addr_t dma_addr; - - if (rswitch_get_num_cur_queues(gq) >= gq->ring_size - 1) { - netif_stop_subqueue(ndev, 0); - return NETDEV_TX_BUSY; - } - - if (skb_put_padto(skb, ETH_ZLEN)) - return ret; - - dma_addr = dma_map_single(ndev->dev.parent, skb->data, skb->len, DMA_TO_DEVICE); - if (dma_mapping_error(ndev->dev.parent, dma_addr)) { - dev_kfree_skb_any(skb); - return ret; - } - - gq->skbs[gq->cur] = skb; - desc = &gq->tx_ring[gq->cur]; - rswitch_desc_set_dptr(&desc->desc, dma_addr); - desc->desc.info_ds = cpu_to_le16(skb->len); - - desc->info1 = cpu_to_le64(INFO1_DV(BIT(rdev->etha->index)) | - INFO1_IPV(GWCA_IPV_NUM) | INFO1_FMT); - if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) { - struct rswitch_gwca_ts_info *ts_info; - - ts_info = kzalloc(sizeof(*ts_info), GFP_ATOMIC); - if (!ts_info) { - dma_unmap_single(ndev->dev.parent, dma_addr, skb->len, DMA_TO_DEVICE); - return -ENOMEM; - } - - skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; - rdev->ts_tag++; - desc->info1 |= cpu_to_le64(INFO1_TSUN(rdev->ts_tag) | INFO1_TXC); - - ts_info->skb = skb_get(skb); - ts_info->port = rdev->port; - ts_info->tag = rdev->ts_tag; - list_add_tail(&ts_info->list, &rdev->priv->gwca.ts_info_list); - - skb_tx_timestamp(skb); - } - - dma_wmb(); - - desc->desc.die_dt = DT_FSINGLE | DIE; - wmb(); /* gq->cur must be incremented after die_dt was set */ - - gq->cur = rswitch_next_queue_index(gq, true, 1); - rswitch_modify(rdev->addr, GWTRC(gq->index), 0, BIT(gq->index % 32)); - - return ret; -} - -static struct net_device_stats *rswitch_get_stats(struct net_device *ndev) -{ - return &ndev->stats; -} - -static int rswitch_hwstamp_get(struct net_device *ndev, struct ifreq *req) -{ - struct rswitch_device *rdev = netdev_priv(ndev); - struct rcar_gen4_ptp_private *ptp_priv; - struct hwtstamp_config config; - - ptp_priv = rdev->priv->ptp_priv; - - config.flags = 0; - config.tx_type = ptp_priv->tstamp_tx_ctrl ? HWTSTAMP_TX_ON : - HWTSTAMP_TX_OFF; - switch (ptp_priv->tstamp_rx_ctrl & RCAR_GEN4_RXTSTAMP_TYPE) { - case RCAR_GEN4_RXTSTAMP_TYPE_V2_L2_EVENT: - config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT; - break; - case RCAR_GEN4_RXTSTAMP_TYPE_ALL: - config.rx_filter = HWTSTAMP_FILTER_ALL; - break; - default: - config.rx_filter = HWTSTAMP_FILTER_NONE; - break; - } - - return copy_to_user(req->ifr_data, &config, sizeof(config)) ? -EFAULT : 0; -} - -static int rswitch_hwstamp_set(struct net_device *ndev, struct ifreq *req) -{ - struct rswitch_device *rdev = netdev_priv(ndev); - u32 tstamp_rx_ctrl = RCAR_GEN4_RXTSTAMP_ENABLED; - struct hwtstamp_config config; - u32 tstamp_tx_ctrl; - - if (copy_from_user(&config, req->ifr_data, sizeof(config))) - return -EFAULT; - - if (config.flags) - return -EINVAL; - - switch (config.tx_type) { - case HWTSTAMP_TX_OFF: - tstamp_tx_ctrl = 0; - break; - case HWTSTAMP_TX_ON: - tstamp_tx_ctrl = RCAR_GEN4_TXTSTAMP_ENABLED; - break; - default: - return -ERANGE; - } - - switch (config.rx_filter) { - case HWTSTAMP_FILTER_NONE: - tstamp_rx_ctrl = 0; - break; - case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: - tstamp_rx_ctrl |= RCAR_GEN4_RXTSTAMP_TYPE_V2_L2_EVENT; - break; - default: - config.rx_filter = HWTSTAMP_FILTER_ALL; - tstamp_rx_ctrl |= RCAR_GEN4_RXTSTAMP_TYPE_ALL; - break; - } - - rdev->priv->ptp_priv->tstamp_tx_ctrl = tstamp_tx_ctrl; - rdev->priv->ptp_priv->tstamp_rx_ctrl = tstamp_rx_ctrl; - - return copy_to_user(req->ifr_data, &config, sizeof(config)) ? -EFAULT : 0; -} - -static int rswitch_eth_ioctl(struct net_device *ndev, struct ifreq *req, int cmd) -{ - if (!netif_running(ndev)) - return -EINVAL; - - switch (cmd) { - case SIOCGHWTSTAMP: - return rswitch_hwstamp_get(ndev, req); - case SIOCSHWTSTAMP: - return rswitch_hwstamp_set(ndev, req); - default: - return phy_mii_ioctl(ndev->phydev, req, cmd); - } -} - -static const struct net_device_ops rswitch_netdev_ops = { - .ndo_open = rswitch_open, - .ndo_stop = rswitch_stop, - .ndo_start_xmit = rswitch_start_xmit, - .ndo_get_stats = rswitch_get_stats, - .ndo_eth_ioctl = rswitch_eth_ioctl, - .ndo_validate_addr = eth_validate_addr, - .ndo_set_mac_address = eth_mac_addr, -}; - -static int rswitch_get_ts_info(struct net_device *ndev, struct ethtool_ts_info *info) -{ - struct rswitch_device *rdev = netdev_priv(ndev); - - info->phc_index = ptp_clock_index(rdev->priv->ptp_priv->clock); - info->so_timestamping = SOF_TIMESTAMPING_TX_SOFTWARE | - SOF_TIMESTAMPING_RX_SOFTWARE | - SOF_TIMESTAMPING_SOFTWARE | - SOF_TIMESTAMPING_TX_HARDWARE | - SOF_TIMESTAMPING_RX_HARDWARE | - SOF_TIMESTAMPING_RAW_HARDWARE; - info->tx_types = BIT(HWTSTAMP_TX_OFF) | BIT(HWTSTAMP_TX_ON); - info->rx_filters = BIT(HWTSTAMP_FILTER_NONE) | BIT(HWTSTAMP_FILTER_ALL); - - return 0; -} - -static const struct ethtool_ops rswitch_ethtool_ops = { - .get_ts_info = rswitch_get_ts_info, -}; - -static const struct of_device_id renesas_eth_sw_of_table[] = { - { .compatible = "renesas,r8a779f0-ether-switch", }, - { } -}; -MODULE_DEVICE_TABLE(of, renesas_eth_sw_of_table); - -static void rswitch_etha_init(struct rswitch_private *priv, int index) -{ - struct rswitch_etha *etha = &priv->etha[index]; - - memset(etha, 0, sizeof(*etha)); - etha->index = index; - etha->addr = priv->addr + RSWITCH_ETHA_OFFSET + index * RSWITCH_ETHA_SIZE; - etha->coma_addr = priv->addr; -} - -static int rswitch_device_alloc(struct rswitch_private *priv, int index) -{ - struct platform_device *pdev = priv->pdev; - struct rswitch_device *rdev; - struct net_device *ndev; - int err; - - if (index >= RSWITCH_NUM_PORTS) - return -EINVAL; - - ndev = alloc_etherdev_mqs(sizeof(struct rswitch_device), 1, 1); - if (!ndev) - return -ENOMEM; - - SET_NETDEV_DEV(ndev, &pdev->dev); - ether_setup(ndev); - - rdev = netdev_priv(ndev); - rdev->ndev = ndev; - rdev->priv = priv; - priv->rdev[index] = rdev; - rdev->port = index; - rdev->etha = &priv->etha[index]; - rdev->addr = priv->addr; - - ndev->base_addr = (unsigned long)rdev->addr; - snprintf(ndev->name, IFNAMSIZ, "tsn%d", index); - ndev->netdev_ops = &rswitch_netdev_ops; - ndev->ethtool_ops = &rswitch_ethtool_ops; - - netif_napi_add(ndev, &rdev->napi, rswitch_poll); - - rdev->np_port = rswitch_get_port_node(rdev); - rdev->disabled = !rdev->np_port; - err = of_get_ethdev_address(rdev->np_port, ndev); - of_node_put(rdev->np_port); - if (err) { - if (is_valid_ether_addr(rdev->etha->mac_addr)) - eth_hw_addr_set(ndev, rdev->etha->mac_addr); - else - eth_hw_addr_random(ndev); - } - - err = rswitch_etha_get_params(rdev); - if (err < 0) - goto out_get_params; - - if (rdev->priv->gwca.speed < rdev->etha->speed) - rdev->priv->gwca.speed = rdev->etha->speed; - - err = rswitch_rxdmac_alloc(ndev); - if (err < 0) - goto out_rxdmac; - - err = rswitch_txdmac_alloc(ndev); - if (err < 0) - goto out_txdmac; - - return 0; - -out_txdmac: - rswitch_rxdmac_free(ndev); - -out_rxdmac: -out_get_params: - netif_napi_del(&rdev->napi); - free_netdev(ndev); - - return err; -} - -static void rswitch_device_free(struct rswitch_private *priv, int index) -{ - struct rswitch_device *rdev = priv->rdev[index]; - struct net_device *ndev = rdev->ndev; - - rswitch_txdmac_free(ndev); - rswitch_rxdmac_free(ndev); - netif_napi_del(&rdev->napi); - free_netdev(ndev); -} - -static int rswitch_init(struct rswitch_private *priv) -{ - int i, err; - - for (i = 0; i < RSWITCH_NUM_PORTS; i++) - rswitch_etha_init(priv, i); - - rswitch_clock_enable(priv); - for (i = 0; i < RSWITCH_NUM_PORTS; i++) - rswitch_etha_read_mac_address(&priv->etha[i]); - - rswitch_reset(priv); - - rswitch_clock_enable(priv); - rswitch_top_init(priv); - err = rswitch_bpool_config(priv); - if (err < 0) - return err; - - rswitch_coma_init(priv); - - err = rswitch_gwca_linkfix_alloc(priv); - if (err < 0) - return -ENOMEM; - - err = rswitch_gwca_ts_queue_alloc(priv); - if (err < 0) - goto err_ts_queue_alloc; - - for (i = 0; i < RSWITCH_NUM_PORTS; i++) { - err = rswitch_device_alloc(priv, i); - if (err < 0) { - for (i--; i >= 0; i--) - rswitch_device_free(priv, i); - goto err_device_alloc; - } - } - - rswitch_fwd_init(priv); - - err = rcar_gen4_ptp_register(priv->ptp_priv, RCAR_GEN4_PTP_REG_LAYOUT_S4, - RCAR_GEN4_PTP_CLOCK_S4); - if (err < 0) - goto err_ptp_register; - - err = rswitch_gwca_request_irqs(priv); - if (err < 0) - goto err_gwca_request_irq; - - err = rswitch_gwca_ts_request_irqs(priv); - if (err < 0) - goto err_gwca_ts_request_irq; - - err = rswitch_gwca_hw_init(priv); - if (err < 0) - goto err_gwca_hw_init; - - err = rswitch_ether_port_init_all(priv); - if (err) - goto err_ether_port_init_all; - - rswitch_for_each_enabled_port(priv, i) { - err = register_netdev(priv->rdev[i]->ndev); - if (err) { - rswitch_for_each_enabled_port_continue_reverse(priv, i) - unregister_netdev(priv->rdev[i]->ndev); - goto err_register_netdev; - } - } - - rswitch_for_each_enabled_port(priv, i) - netdev_info(priv->rdev[i]->ndev, "MAC address %pM\n", - priv->rdev[i]->ndev->dev_addr); - - return 0; - -err_register_netdev: - rswitch_ether_port_deinit_all(priv); - -err_ether_port_init_all: - rswitch_gwca_hw_deinit(priv); - -err_gwca_hw_init: -err_gwca_ts_request_irq: -err_gwca_request_irq: - rcar_gen4_ptp_unregister(priv->ptp_priv); - -err_ptp_register: - for (i = 0; i < RSWITCH_NUM_PORTS; i++) - rswitch_device_free(priv, i); - -err_device_alloc: - rswitch_gwca_ts_queue_free(priv); - -err_ts_queue_alloc: - rswitch_gwca_linkfix_free(priv); - - return err; -} - -static int renesas_eth_sw_probe(struct platform_device *pdev) -{ - struct rswitch_private *priv; - struct resource *res; - int ret; - - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "secure_base"); - if (!res) { - dev_err(&pdev->dev, "invalid resource\n"); - return -EINVAL; - } - - priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); - if (!priv) - return -ENOMEM; - - priv->ptp_priv = rcar_gen4_ptp_alloc(pdev); - if (!priv->ptp_priv) - return -ENOMEM; - - platform_set_drvdata(pdev, priv); - priv->pdev = pdev; - priv->addr = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(priv->addr)) - return PTR_ERR(priv->addr); - - priv->ptp_priv->addr = priv->addr + RCAR_GEN4_GPTP_OFFSET_S4; - - ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40)); - if (ret < 0) { - ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); - if (ret < 0) - return ret; - } - - priv->gwca.index = AGENT_INDEX_GWCA; - priv->gwca.num_queues = min(RSWITCH_NUM_PORTS * NUM_QUEUES_PER_NDEV, - RSWITCH_MAX_NUM_QUEUES); - priv->gwca.queues = devm_kcalloc(&pdev->dev, priv->gwca.num_queues, - sizeof(*priv->gwca.queues), GFP_KERNEL); - if (!priv->gwca.queues) - return -ENOMEM; - - pm_runtime_enable(&pdev->dev); - pm_runtime_get_sync(&pdev->dev); - - ret = rswitch_init(priv); - if (ret < 0) { - pm_runtime_put(&pdev->dev); - pm_runtime_disable(&pdev->dev); - return ret; - } - - device_set_wakeup_capable(&pdev->dev, 1); - - return ret; -} - -static void rswitch_deinit(struct rswitch_private *priv) -{ - int i; - - rswitch_gwca_hw_deinit(priv); - rcar_gen4_ptp_unregister(priv->ptp_priv); - - for (i = 0; i < RSWITCH_NUM_PORTS; i++) { - struct rswitch_device *rdev = priv->rdev[i]; - - phy_exit(priv->rdev[i]->serdes); - rswitch_ether_port_deinit_one(rdev); - unregister_netdev(rdev->ndev); - rswitch_device_free(priv, i); - } - - rswitch_gwca_ts_queue_free(priv); - rswitch_gwca_linkfix_free(priv); - - rswitch_clock_disable(priv); -} - -static int renesas_eth_sw_remove(struct platform_device *pdev) -{ - struct rswitch_private *priv = platform_get_drvdata(pdev); - - rswitch_deinit(priv); - - pm_runtime_put(&pdev->dev); - pm_runtime_disable(&pdev->dev); - - platform_set_drvdata(pdev, NULL); - - return 0; -} - -static struct platform_driver renesas_eth_sw_driver_platform = { - .probe = renesas_eth_sw_probe, - .remove = renesas_eth_sw_remove, - .driver = { - .name = "renesas_eth_sw", - .of_match_table = renesas_eth_sw_of_table, - } -}; -module_platform_driver(renesas_eth_sw_driver_platform); -MODULE_AUTHOR("Yoshihiro Shimoda"); -MODULE_DESCRIPTION("Renesas Ethernet Switch device driver"); -MODULE_LICENSE("GPL"); |