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Message-Id: <20240510000331.154486-3-jitendra.vegiraju@broadcom.com>
Date: Thu, 9 May 2024 17:03:31 -0700
From: Jitendra Vegiraju <jitendra.vegiraju@...adcom.com>
To: netdev@...r.kernel.org
Cc: jitendra.vegiraju@...adcom.com,
davem@...emloft.net,
edumazet@...gle.com,
kuba@...nel.org,
pabeni@...hat.com,
bcm-kernel-feedback-list@...adcom.com
Subject: [PATCH, net-next, 2/2] net: stmmac: PCI driver for BCM8958X SoC
Broadcom BCM8958X SoCs use Synopsys XGMAC design, which is similar to
dwxgmac2 core implementation in stmmac driver. The existing dwxgmac2 dma
operation functions have some conflicting differences with BCM8958X.
This glue driver attempts to reuse dwxgmac2 implementation wherever
possible, adding alternative implementations where necessary.
Signed-off-by: Jitendra Vegiraju <jitendra.vegiraju@...adcom.com>
---
MAINTAINERS | 7 +
drivers/net/ethernet/stmicro/stmmac/Kconfig | 11 +
drivers/net/ethernet/stmicro/stmmac/Makefile | 1 +
.../net/ethernet/stmicro/stmmac/dwmac-brcm.c | 657 ++++++++++++++++++
4 files changed, 676 insertions(+)
create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-brcm.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 294e472d7de8..8bf9df7028d6 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4115,6 +4115,13 @@ N: brcmstb
N: bcm7038
N: bcm7120
+BROADCOM BCM8958X ETHERNET DRIVER
+M: Jitendra Vegiraju <jitendra.vegiraju@...adcom.com>
+R: Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>
+L: netdev@...r.kernel.org
+S: Maintained
+F: drivers/net/ethernet/stmicro/stmmac/dwmac-brcm.c
+
BROADCOM BCMBCA ARM ARCHITECTURE
M: William Zhang <william.zhang@...adcom.com>
M: Anand Gore <anand.gore@...adcom.com>
diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig
index 4ec61f1ee71a..6c06149712c8 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Kconfig
+++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig
@@ -286,6 +286,17 @@ config DWMAC_LOONGSON
This selects the LOONGSON PCI bus support for the stmmac driver,
Support for ethernet controller on Loongson-2K1000 SoC and LS7A1000 bridge.
+config DWMAC_BRCM
+ tristate "Broadcom XGMAC support"
+ depends on STMMAC_ETH && PCI
+ depends on COMMON_CLK
+ help
+ Support for ethernet controllers on Broadcom BCM8958x SoCs
+
+ This selects Broadcom XGMAC specific PCI bus support for the
+ stmmac driver. This driver provides the glue layer on top of the
+ stmmac driver required for the Broadcom BCM8958x SoC devices.
+
config STMMAC_PCI
tristate "STMMAC PCI bus support"
depends on STMMAC_ETH && PCI
diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile b/drivers/net/ethernet/stmicro/stmmac/Makefile
index 26cad4344701..1cd0f508bafb 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Makefile
+++ b/drivers/net/ethernet/stmicro/stmmac/Makefile
@@ -40,4 +40,5 @@ dwmac-altr-socfpga-objs := dwmac-socfpga.o
obj-$(CONFIG_STMMAC_PCI) += stmmac-pci.o
obj-$(CONFIG_DWMAC_INTEL) += dwmac-intel.o
obj-$(CONFIG_DWMAC_LOONGSON) += dwmac-loongson.o
+obj-$(CONFIG_DWMAC_BRCM) += dwmac-brcm.o
stmmac-pci-objs:= stmmac_pci.o
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-brcm.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-brcm.c
new file mode 100644
index 000000000000..86125f59a8ff
--- /dev/null
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-brcm.c
@@ -0,0 +1,657 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2024 Broadcom Corporation
+ * This file contains the functions to handle the Broadcom XGMAC PCI driver.
+ *
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/dmi.h>
+#include <linux/pci.h>
+#include <linux/phy.h>
+#include <linux/phy_fixed.h>
+
+#include "stmmac.h"
+#include "dwxgmac2.h"
+
+#define PCI_DEVICE_ID_BROADCOM_BCM8958X 0xa00d
+#define BRCM_MAX_MTU 1500
+#define READ_POLL_DELAY_US 100
+#define READ_POLL_TIMEOUT_US 10000
+#define DWMAC_125MHZ 125000000
+#define DWMAC_250MHZ 250000000
+
+/* TX and RX Queue couts */
+#define BRCM_TX_Q_COUNT 4
+#define BRCM_RX_Q_COUNT 1
+
+/* PDMA Channel counts */
+#define PDMA_TX_CH_COUNT 8
+#define PDMA_RX_CH_COUNT 10
+
+/* PDMA register type */
+#define PDMA_CH_TX_EXT_CFGR 0
+#define PDMA_CH_RX_EXT_CFGR 1
+#define PDMA_CH_TX_DBG_STSR 2
+#define PDMA_CH_RX_DBG_STSR 3
+
+/* VDMA register type */
+#define VDMA_CH_TX_DESC_CTRLR 4
+#define VDMA_CH_RX_DESC_CTRLR 5
+
+/* VDMA channel count */
+#define VDMA_TOTAL_CH_COUNT 32
+
+#define DMA_CH_IND_CTRLR 0x3080
+#define DMA_CH_IND_DATAR 0x3084
+
+#define BRCM_XGMAC_RX_CFG 0x2000
+#define BRCM_XGMAC_RXQ_CTRL1_CFG 0x8000
+
+#define BRCM_XGMAC_DMA_TX_SIZE 4096
+#define BRCM_XGMAC_DMA_RX_SIZE 4096
+#define BRCM_XGMAC_BAR0_MASK BIT(0)
+
+#define BRCM_XGMAC_IOMEM_MISC_REG_OFFSET 0x0
+#define BRCM_XGMAC_IOMEM_MBOX_REG_OFFSET 0x1000
+#define BRCM_XGMAC_IOMEM_CFG_REG_OFFSET 0x3000
+
+#define XGMAC_PCIE_CFG_MSIX_ADDR_MATCH_LOW 0x940
+#define XGMAC_PCIE_CFG_MSIX_ADDR_MATCH_LO_VALUE 0x00000001
+#define XGMAC_PCIE_CFG_MSIX_ADDR_MATCH_HIGH 0x944
+#define XGMAC_PCIE_CFG_MSIX_ADDR_MATCH_HI_VALUE 0x88000000
+
+#define XGMAC_PCIE_MISC_MII_CTRL 0x4
+#define XGMAC_PCIE_MISC_MII_CTRL_VALUE 0x7
+#define XGMAC_PCIE_MISC_PCIESS_CTRL 0x8
+#define XGMAC_PCIE_MISC_PCIESS_CTRL_VALUE 0x200
+#define XGMAC_PCIE_MISC_MSIX_ADDR_MATCH_LO 0x90
+#define XGMAC_PCIE_MISC_MSIX_ADDR_MATCH_LO_VALUE 0x00000001
+#define XGMAC_PCIE_MISC_MSIX_ADDR_MATCH_HI 0x94
+#define XGMAC_PCIE_MISC_MSIX_ADDR_MATCH_HI_VALUE 0x88000000
+#define XGMAC_PCIE_MISC_MSIX_VECTOR_MAP_EP2HOST0 0x700
+#define XGMAC_PCIE_MISC_MSIX_VECTOR_MAP_EP2HOST0_VALUE 1
+#define XGMAC_PCIE_MISC_MSIX_VECTOR_MAP_EP2HOST1 0x704
+#define XGMAC_PCIE_MISC_MSIX_VECTOR_MAP_EP2HOST1_VALUE 1
+#define XGMAC_PCIE_MISC_MSIX_VECTOR_MAP_EP2HOST_DBELL 0x728
+#define XGMAC_PCIE_MISC_MSIX_VECTOR_MAP_EP2HOST_DBELL_VALUE 1
+#define XGMAC_PCIE_MISC_MSIX_VECTOR_MAP_SBD_ALL 0x740
+#define XGMAC_PCIE_MISC_MSIX_VECTOR_MAP_SBD_ALL_VALUE 0
+
+#define DMA_CH_IND_CTRLR_MSEL_OFF 24
+#define DMA_CH_IND_CTRLR_MSEL_MASK GENMASK(27, 24)
+#define DMA_CH_IND_CTRLR_AOFF_OFF 8
+#define DMA_CH_IND_CTRLR_AOFF_MASK GENMASK(14, 8)
+#define DMA_CH_IND_CTRLR_AUTO_OFF 4
+#define DMA_CH_IND_CTRLR_AUTO_MASK GENMASK(5, 4)
+#define DMA_CH_IND_CTRLR_CT_OFF 1
+#define DMA_CH_IND_CTRLR_CT_MASK BIT(1)
+#define DMA_CH_IND_CTRLR_OB_OFF 0
+#define DMA_CH_IND_CTRLR_OB_MASK BIT(0)
+
+/* DMA Descriptor configuration */
+#define BRCM_PDMA_DESC_CTRL_CFG_VALUE 0x1B
+
+#define XGMAC_PCIE_MISC_FUNC_RESOURCES_PF0 0x804
+
+/* MSIX Vector map register starting offsets */
+#define XGMAC_PCIE_MISC_MSIX_VECTOR_MAP_RX0_PF0 0x840
+#define XGMAC_PCIE_MISC_MSIX_VECTOR_MAP_TX0_PF0 0x890
+#define BRCM_MAX_DMA_CHANNEL_PAIRS 4
+
+#define BRCM_XGMAC_MSI_MAC_VECTOR 0
+#define BRCM_XGMAC_MSI_RX_VECTOR_START 9
+#define BRCM_XGMAC_MSI_TX_VECTOR_START 10
+
+static int num_instances;
+
+struct brcm_priv_data {
+ struct phy_device *phy_dev;
+ void __iomem *mbox_regs; /* MBOX */
+ void __iomem *misc_regs; /* MISC_cfg */
+ u16 dev_id;
+ u16 phy_addr;
+};
+
+static struct fixed_phy_status dwxgmac_brcm_fixed_phy_status = {
+ .link = 1,
+ .speed = SPEED_1000,
+ .duplex = DUPLEX_FULL,
+};
+
+struct dwxgmac_brcm_pci_info {
+ int (*setup)(struct pci_dev *pdev, struct plat_stmmacenet_data *plat);
+};
+
+static inline void misc_iowrite(struct brcm_priv_data *brcm_priv,
+ u32 reg, u32 val)
+{
+ iowrite32(val, brcm_priv->misc_regs + reg);
+}
+
+static void dwxgmac_brcm_pdma_set(void __iomem *ioaddr, u32 type, u32 chan,
+ u32 val)
+{
+ u32 var = 0;
+
+ var |= FIELD_PREP(DMA_CH_IND_CTRLR_MSEL_MASK, type);
+ var |= FIELD_PREP(DMA_CH_IND_CTRLR_AOFF_MASK, chan);
+ var |= FIELD_PREP(DMA_CH_IND_CTRLR_CT_MASK, 0);
+ var |= FIELD_PREP(DMA_CH_IND_CTRLR_OB_MASK, 1);
+
+ if (!FIELD_GET(DMA_CH_IND_CTRLR_OB_MASK,
+ readl(ioaddr + DMA_CH_IND_CTRLR))) {
+ writel(0x0, (ioaddr + DMA_CH_IND_CTRLR));
+ writel(val, (ioaddr + DMA_CH_IND_DATAR));
+ }
+
+ writel(var, (ioaddr + DMA_CH_IND_CTRLR));
+ readl_poll_timeout(ioaddr + DMA_CH_IND_CTRLR, var,
+ !(var & XGMAC_OB), READ_POLL_TIMEOUT_US,
+ READ_POLL_TIMEOUT_US);
+}
+
+static void dwxgmac_brcm_dma_init(void __iomem *ioaddr,
+ struct stmmac_dma_cfg *dma_cfg, int atds)
+{
+ u32 val = dma_cfg->pbl << 24;
+ u32 i;
+
+ if (dma_cfg->pblx8)
+ val |= (1 << 19);
+
+ dwxgmac2_dma_init(ioaddr, dma_cfg, atds);
+
+ for (i = 0; i < PDMA_TX_CH_COUNT; i++)
+ dwxgmac_brcm_pdma_set(ioaddr, PDMA_CH_TX_EXT_CFGR, i, val);
+
+ for (i = 0; i < PDMA_RX_CH_COUNT; i++)
+ dwxgmac_brcm_pdma_set(ioaddr, PDMA_CH_RX_EXT_CFGR, i, val);
+
+ for (i = 0; i < VDMA_TOTAL_CH_COUNT; i++) {
+ dwxgmac_brcm_pdma_set(ioaddr, VDMA_CH_TX_DESC_CTRLR, i,
+ BRCM_PDMA_DESC_CTRL_CFG_VALUE);
+ dwxgmac_brcm_pdma_set(ioaddr, VDMA_CH_RX_DESC_CTRLR, i,
+ BRCM_PDMA_DESC_CTRL_CFG_VALUE);
+ }
+}
+
+static void dwxgmac_brcm_dma_init_tx_chan(struct stmmac_priv *priv,
+ void __iomem *ioaddr,
+ struct stmmac_dma_cfg *dma_cfg,
+ dma_addr_t phy, u32 chan)
+{
+ u32 value;
+
+ value = readl(ioaddr + XGMAC_DMA_CH_TX_CONTROL(chan));
+ value &= ~XGMAC_TxPBL;
+ value &= ~GENMASK(6, 4);
+ writel(value, ioaddr + XGMAC_DMA_CH_TX_CONTROL(chan));
+
+ writel(upper_32_bits(phy), ioaddr + XGMAC_DMA_CH_TxDESC_HADDR(chan));
+ writel(lower_32_bits(phy), ioaddr + XGMAC_DMA_CH_TxDESC_LADDR(chan));
+}
+
+static void dwxgmac_brcm_dma_init_rx_chan(struct stmmac_priv *priv,
+ void __iomem *ioaddr,
+ struct stmmac_dma_cfg *dma_cfg,
+ dma_addr_t phy, u32 chan)
+{
+ u32 value;
+
+ value = readl(ioaddr + XGMAC_DMA_CH_RX_CONTROL(chan));
+ value &= ~XGMAC_RxPBL;
+ writel(value, ioaddr + XGMAC_DMA_CH_RX_CONTROL(chan));
+
+ writel(upper_32_bits(phy), ioaddr + XGMAC_DMA_CH_RxDESC_HADDR(chan));
+ writel(lower_32_bits(phy), ioaddr + XGMAC_DMA_CH_RxDESC_LADDR(chan));
+}
+
+const struct stmmac_dma_ops dwxgmac_brcm_dma_ops = {
+ .reset = dwxgmac2_dma_reset,
+ .init = dwxgmac_brcm_dma_init,
+ .init_chan = dwxgmac2_dma_init_chan,
+ .init_rx_chan = dwxgmac_brcm_dma_init_rx_chan,
+ .init_tx_chan = dwxgmac_brcm_dma_init_tx_chan,
+ .axi = dwxgmac2_dma_axi,
+ .dump_regs = dwxgmac2_dma_dump_regs,
+ .dma_rx_mode = dwxgmac2_dma_rx_mode,
+ .dma_tx_mode = dwxgmac2_dma_tx_mode,
+ .enable_dma_irq = dwxgmac2_enable_dma_irq,
+ .disable_dma_irq = dwxgmac2_disable_dma_irq,
+ .start_tx = dwxgmac2_dma_start_tx,
+ .stop_tx = dwxgmac2_dma_stop_tx,
+ .start_rx = dwxgmac2_dma_start_rx,
+ .stop_rx = dwxgmac2_dma_stop_rx,
+ .dma_interrupt = dwxgmac2_dma_interrupt,
+ .get_hw_feature = dwxgmac2_get_hw_feature,
+ .rx_watchdog = dwxgmac2_rx_watchdog,
+ .set_rx_ring_len = dwxgmac2_set_rx_ring_len,
+ .set_tx_ring_len = dwxgmac2_set_tx_ring_len,
+ .set_rx_tail_ptr = dwxgmac2_set_rx_tail_ptr,
+ .set_tx_tail_ptr = dwxgmac2_set_tx_tail_ptr,
+ .enable_tso = dwxgmac2_enable_tso,
+ .qmode = dwxgmac2_qmode,
+ .set_bfsize = dwxgmac2_set_bfsize,
+ .enable_sph = dwxgmac2_enable_sph,
+ .enable_tbs = dwxgmac2_enable_tbs,
+};
+
+static void dwxgmac_brcm_fix_speed(void *priv, unsigned int speed,
+ unsigned int mode)
+{
+}
+
+static struct mac_device_info *dwxgmac_brcm_setup(void *ppriv)
+{
+ struct mac_device_info *mac;
+ struct stmmac_priv *priv = ppriv;
+
+ mac = devm_kzalloc(priv->device, sizeof(*mac), GFP_KERNEL);
+ if (!mac)
+ return NULL;
+
+ mac->dma = &dwxgmac_brcm_dma_ops;
+
+ priv->dma_conf.dma_tx_size = BRCM_XGMAC_DMA_TX_SIZE;
+ priv->dma_conf.dma_rx_size = BRCM_XGMAC_DMA_RX_SIZE;
+ priv->plat->rss_en = 1;
+ mac->pcsr = priv->ioaddr;
+ priv->dev->priv_flags |= IFF_UNICAST_FLT;
+ mac->multicast_filter_bins = priv->plat->multicast_filter_bins;
+ mac->unicast_filter_entries = priv->plat->unicast_filter_entries;
+ mac->mcast_bits_log2 = 0;
+
+ if (mac->multicast_filter_bins)
+ mac->mcast_bits_log2 = ilog2(mac->multicast_filter_bins);
+
+ mac->link.duplex = 0;
+ mac->link.xgmii.speed10000 = XGMAC_CONFIG_SS_10000;
+ mac->link.speed_mask = XGMAC_CONFIG_SS_MASK;
+ return mac;
+}
+
+static void dwxgmac_brcm_common_default_data(struct plat_stmmacenet_data *plat)
+{
+ int i;
+
+ plat->has_xgmac = 1;
+ plat->force_sf_dma_mode = 1;
+ plat->mac_port_sel_speed = SPEED_10000;
+ plat->clk_ptp_rate = DWMAC_125MHZ;
+ plat->clk_ref_rate = DWMAC_250MHZ;
+ plat->setup = dwxgmac_brcm_setup;
+ plat->tx_coe = 1;
+ plat->rx_coe = 1;
+ plat->max_speed = SPEED_10000;
+ plat->fix_mac_speed = dwxgmac_brcm_fix_speed;
+
+ /* Set default value for multicast hash bins */
+ plat->multicast_filter_bins = HASH_TABLE_SIZE;
+
+ /* Set default value for unicast filter entries */
+ plat->unicast_filter_entries = 1;
+
+ /* Set the maxmtu to device's default */
+ plat->maxmtu = BRCM_MAX_MTU;
+
+ /* Set default number of RX and TX queues to use */
+ plat->tx_queues_to_use = BRCM_TX_Q_COUNT;
+ plat->rx_queues_to_use = BRCM_RX_Q_COUNT;
+
+ plat->tx_sched_algorithm = MTL_TX_ALGORITHM_SP;
+ for (i = 0; i < plat->tx_queues_to_use; i++) {
+ plat->tx_queues_cfg[i].use_prio = false;
+ plat->tx_queues_cfg[i].prio = 0;
+ plat->tx_queues_cfg[i].mode_to_use = MTL_QUEUE_DCB;
+ }
+
+ plat->rx_sched_algorithm = MTL_RX_ALGORITHM_SP;
+ for (i = 0; i < plat->rx_queues_to_use; i++) {
+ plat->rx_queues_cfg[i].use_prio = false;
+ plat->rx_queues_cfg[i].mode_to_use = MTL_QUEUE_DCB;
+ plat->rx_queues_cfg[i].pkt_route = 0x0;
+ plat->rx_queues_cfg[i].chan = i;
+ }
+}
+
+static int dwxgmac_brcm_default_data(struct pci_dev *pdev,
+ struct plat_stmmacenet_data *plat)
+{
+ struct brcm_priv_data *brcm_priv = plat->bsp_priv;
+
+ /* Set common default data first */
+ dwxgmac_brcm_common_default_data(plat);
+
+ plat->bus_id = 0;
+ plat->phy_addr = num_instances++;
+ brcm_priv->phy_addr = num_instances;
+ plat->phy_interface = PHY_INTERFACE_MODE_USXGMII;
+
+ plat->dma_cfg->pbl = 32;
+ plat->dma_cfg->pblx8 = 0;
+ plat->dma_cfg->aal = 0;
+ plat->dma_cfg->eame = 1;
+
+ plat->axi->axi_wr_osr_lmt = 31;
+ plat->axi->axi_rd_osr_lmt = 31;
+ plat->axi->axi_fb = 0;
+ plat->axi->axi_blen[0] = 4;
+ plat->axi->axi_blen[1] = 8;
+ plat->axi->axi_blen[2] = 16;
+ plat->axi->axi_blen[3] = 32;
+ plat->axi->axi_blen[4] = 64;
+ plat->axi->axi_blen[5] = 128;
+ plat->axi->axi_blen[6] = 256;
+
+ plat->msi_mac_vec = BRCM_XGMAC_MSI_MAC_VECTOR;
+ plat->msi_rx_base_vec = BRCM_XGMAC_MSI_RX_VECTOR_START;
+ plat->msi_tx_base_vec = BRCM_XGMAC_MSI_TX_VECTOR_START;
+
+ return 0;
+}
+
+static struct dwxgmac_brcm_pci_info dwxgmac_brcm_pci_info = {
+ .setup = dwxgmac_brcm_default_data,
+};
+
+static int brcm_config_multi_msi(struct pci_dev *pdev,
+ struct plat_stmmacenet_data *plat,
+ struct stmmac_resources *res)
+{
+ int ret;
+ int i;
+
+ if (plat->msi_rx_base_vec >= STMMAC_MSI_VEC_MAX ||
+ plat->msi_tx_base_vec >= STMMAC_MSI_VEC_MAX) {
+ dev_err(&pdev->dev, "%s: Invalid RX & TX vector defined\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ ret = pci_alloc_irq_vectors(pdev, 2, STMMAC_MSI_VEC_MAX,
+ PCI_IRQ_MSI | PCI_IRQ_MSIX);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "%s: multi MSI enablement failed\n",
+ __func__);
+ return ret;
+ }
+
+ /* For RX MSI */
+ for (i = 0; i < plat->rx_queues_to_use; i++)
+ res->rx_irq[i] = pci_irq_vector(pdev,
+ plat->msi_rx_base_vec + i * 2);
+
+ /* For TX MSI */
+ for (i = 0; i < plat->tx_queues_to_use; i++)
+ res->tx_irq[i] = pci_irq_vector(pdev,
+ plat->msi_tx_base_vec + i * 2);
+
+ if (plat->msi_mac_vec < STMMAC_MSI_VEC_MAX)
+ res->irq = pci_irq_vector(pdev, plat->msi_mac_vec);
+
+ plat->flags |= STMMAC_FLAG_MULTI_MSI_EN;
+ plat->flags |= STMMAC_FLAG_TSO_EN;
+
+ return 0;
+}
+
+/**
+ * dwxgmac_brcm_pci_probe
+ *
+ * @pdev: pci device pointer
+ * @id: pointer to table of device id/id's.
+ *
+ * Description: This probing function gets called for all PCI devices which
+ * match the ID table and are not "owned" by other driver yet. This function
+ * gets passed a "struct pci_dev *" for each device whose entry in the ID table
+ * matches the device. The probe functions returns zero when the driver choose
+ * to take "ownership" of the device or an error code(-ve no) otherwise.
+ */
+static int dwxgmac_brcm_pci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ struct dwxgmac_brcm_pci_info *info =
+ (struct dwxgmac_brcm_pci_info *)id->driver_data;
+ struct plat_stmmacenet_data *plat;
+ struct brcm_priv_data *brcm_priv;
+ struct stmmac_resources res;
+ struct net_device *ndev;
+ struct stmmac_priv *priv;
+ int rx_offset;
+ int tx_offset;
+ int vector;
+ int ret;
+
+ brcm_priv = devm_kzalloc(&pdev->dev, sizeof(*brcm_priv), GFP_KERNEL);
+ if (!brcm_priv)
+ return -ENOMEM;
+
+ plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
+ if (!plat)
+ return -ENOMEM;
+
+ plat->dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*plat->dma_cfg),
+ GFP_KERNEL);
+ if (!plat->dma_cfg)
+ return -ENOMEM;
+
+ plat->axi = devm_kzalloc(&pdev->dev, sizeof(*plat->axi), GFP_KERNEL);
+ if (!plat->axi)
+ return -ENOMEM;
+
+ pci_read_config_word(pdev, 2, &brcm_priv->dev_id);
+
+ /* This device interface is directly attached to the switch chip on
+ * the SoC. Since no MDIO is present, register fixed_phy.
+ */
+ brcm_priv->phy_dev =
+ fixed_phy_register(PHY_POLL,
+ &dwxgmac_brcm_fixed_phy_status, NULL);
+ if (IS_ERR(brcm_priv->phy_dev)) {
+ dev_err(&pdev->dev, "%s\tNo PHY/fixed_PHY found\n", __func__);
+ return -ENODEV;
+ }
+ phy_attached_info(brcm_priv->phy_dev);
+
+ /* Disable D3COLD as our device does not support it */
+ pci_d3cold_disable(pdev);
+
+ /* Enable PCI device */
+ ret = pcim_enable_device(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "%s: ERROR: failed to enable device\n",
+ __func__);
+ return ret;
+ }
+
+ /* Get the base address of device */
+ ret = pcim_iomap_regions(pdev, BRCM_XGMAC_BAR0_MASK, pci_name(pdev));
+ if (ret)
+ goto err_disable_device;
+ pci_set_master(pdev);
+
+ memset(&res, 0, sizeof(res));
+ res.addr = pcim_iomap_table(pdev)[0];
+ /* MISC Regs */
+ brcm_priv->misc_regs = res.addr + BRCM_XGMAC_IOMEM_MISC_REG_OFFSET;
+ /* MBOX Regs */
+ brcm_priv->mbox_regs = res.addr + BRCM_XGMAC_IOMEM_MBOX_REG_OFFSET;
+ /* XGMAC config Regs */
+ res.addr += BRCM_XGMAC_IOMEM_CFG_REG_OFFSET;
+
+ plat->bsp_priv = brcm_priv;
+
+ /* Initialize all MSI vectors to invalid so that it can be set
+ * according to platform data settings below.
+ * Note: MSI vector takes value from 0 up to 31 (STMMAC_MSI_VEC_MAX)
+ */
+ plat->msi_mac_vec = STMMAC_MSI_VEC_MAX;
+ plat->msi_wol_vec = STMMAC_MSI_VEC_MAX;
+ plat->msi_lpi_vec = STMMAC_MSI_VEC_MAX;
+ plat->msi_sfty_ce_vec = STMMAC_MSI_VEC_MAX;
+ plat->msi_sfty_ue_vec = STMMAC_MSI_VEC_MAX;
+ plat->msi_rx_base_vec = STMMAC_MSI_VEC_MAX;
+ plat->msi_tx_base_vec = STMMAC_MSI_VEC_MAX;
+
+ ret = info->setup(pdev, plat);
+ if (ret)
+ goto err_disable_device;
+
+ pci_write_config_dword(pdev, XGMAC_PCIE_CFG_MSIX_ADDR_MATCH_LOW,
+ XGMAC_PCIE_CFG_MSIX_ADDR_MATCH_LO_VALUE);
+ pci_write_config_dword(pdev, XGMAC_PCIE_CFG_MSIX_ADDR_MATCH_HIGH,
+ XGMAC_PCIE_CFG_MSIX_ADDR_MATCH_HI_VALUE);
+
+ misc_iowrite(brcm_priv, XGMAC_PCIE_MISC_MSIX_ADDR_MATCH_LO,
+ XGMAC_PCIE_MISC_MSIX_ADDR_MATCH_LO_VALUE);
+ misc_iowrite(brcm_priv, XGMAC_PCIE_MISC_MSIX_ADDR_MATCH_HI,
+ XGMAC_PCIE_MISC_MSIX_ADDR_MATCH_HI_VALUE);
+
+ /* SBD Interrupt */
+ misc_iowrite(brcm_priv, XGMAC_PCIE_MISC_MSIX_VECTOR_MAP_SBD_ALL,
+ XGMAC_PCIE_MISC_MSIX_VECTOR_MAP_SBD_ALL_VALUE);
+ /* EP_DOORBELL Interrupt */
+ misc_iowrite(brcm_priv, XGMAC_PCIE_MISC_MSIX_VECTOR_MAP_EP2HOST_DBELL,
+ XGMAC_PCIE_MISC_MSIX_VECTOR_MAP_EP2HOST_DBELL_VALUE);
+ /* EP_H0 Interrupt */
+ misc_iowrite(brcm_priv, XGMAC_PCIE_MISC_MSIX_VECTOR_MAP_EP2HOST0,
+ XGMAC_PCIE_MISC_MSIX_VECTOR_MAP_EP2HOST0_VALUE);
+ /* EP_H1 Interrupt */
+ misc_iowrite(brcm_priv, XGMAC_PCIE_MISC_MSIX_VECTOR_MAP_EP2HOST1,
+ XGMAC_PCIE_MISC_MSIX_VECTOR_MAP_EP2HOST1_VALUE);
+
+ rx_offset = XGMAC_PCIE_MISC_MSIX_VECTOR_MAP_RX0_PF0;
+ tx_offset = XGMAC_PCIE_MISC_MSIX_VECTOR_MAP_TX0_PF0;
+ vector = BRCM_XGMAC_MSI_RX_VECTOR_START;
+ for (int i = 0; i < BRCM_MAX_DMA_CHANNEL_PAIRS; i++) {
+ /* RX Interrupt */
+ misc_iowrite(brcm_priv, rx_offset, vector++);
+ /* TX Interrupt */
+ misc_iowrite(brcm_priv, tx_offset, vector++);
+ rx_offset += 4;
+ tx_offset += 4;
+ }
+
+ /* Enable Switch Link */
+ misc_iowrite(brcm_priv, XGMAC_PCIE_MISC_MII_CTRL,
+ XGMAC_PCIE_MISC_MII_CTRL_VALUE);
+ /* Enable MSI-X */
+ misc_iowrite(brcm_priv, XGMAC_PCIE_MISC_PCIESS_CTRL,
+ XGMAC_PCIE_MISC_PCIESS_CTRL_VALUE);
+
+ ret = brcm_config_multi_msi(pdev, plat, &res);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "%s: ERROR: failed to enable IRQ\n", __func__);
+ return ret;
+ }
+
+ ret = stmmac_dvr_probe(&pdev->dev, plat, &res);
+ if (ret)
+ goto err_disable_msi;
+
+ /* The stmmac core driver doesn't have the infrastructure to
+ * support fixed-phy mdio bus for non-platform bus drivers.
+ * Until a better solution is implemented, initialize the
+ * following entries after priv structure is populated.
+ */
+ ndev = dev_get_drvdata(&pdev->dev);
+ priv = netdev_priv(ndev);
+ priv->mii = mdio_find_bus("fixed-0");
+
+ ndev->hw_features &= ~NETIF_F_HW_VLAN_CTAG_RX;
+ priv->hw->hw_vlan_en = false;
+
+ dev_info(&pdev->dev, "%s\tComplete\n", __func__);
+
+ return ret;
+
+err_disable_msi:
+ pci_disable_msi(pdev);
+err_disable_device:
+ pci_disable_device(pdev);
+ return ret;
+}
+
+/**
+ * dwxgmac_brcm_pci_remove
+ *
+ * @pdev: platform device pointer
+ * Description: this function calls the main to free the net resources
+ * and releases the PCI resources.
+ */
+static void dwxgmac_brcm_pci_remove(struct pci_dev *pdev)
+{
+ struct net_device *ndev = dev_get_drvdata(&pdev->dev);
+ struct stmmac_priv *priv = netdev_priv(ndev);
+ struct brcm_priv_data *brcm_priv = priv->plat->bsp_priv;
+ struct phy_device *phydev = brcm_priv->phy_dev;
+
+ priv->mii = NULL;
+ stmmac_dvr_remove(&pdev->dev);
+ pcim_iounmap_regions(pdev, BRCM_XGMAC_BAR0_MASK);
+ pci_clear_master(pdev);
+ fixed_phy_unregister(phydev);
+}
+
+static int __maybe_unused dwxgmac_brcm_pci_suspend(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ int ret;
+
+ ret = stmmac_suspend(dev);
+ if (ret)
+ return ret;
+
+ ret = pci_save_state(pdev);
+ if (ret)
+ return ret;
+
+ pci_disable_device(pdev);
+ pci_wake_from_d3(pdev, true);
+ return 0;
+}
+
+static int __maybe_unused dwxgmac_brcm_pci_resume(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ int ret;
+
+ pci_restore_state(pdev);
+ pci_set_power_state(pdev, PCI_D0);
+
+ ret = pci_enable_device(pdev);
+ if (ret)
+ return ret;
+
+ pci_set_master(pdev);
+
+ return stmmac_resume(dev);
+}
+
+static SIMPLE_DEV_PM_OPS(dwxgmac_brcm_pm_ops,
+ dwxgmac_brcm_pci_suspend,
+ dwxgmac_brcm_pci_resume);
+
+static const struct pci_device_id dwxgmac_brcm_id_table[] = {
+ { PCI_DEVICE_DATA(BROADCOM, BCM8958X, &dwxgmac_brcm_pci_info) },
+ {}
+};
+
+MODULE_DEVICE_TABLE(pci, dwxgmac_brcm_id_table);
+
+static struct pci_driver dwxgmac_brcm_pci_driver = {
+ .name = "brcm-bcm8958x",
+ .id_table = dwxgmac_brcm_id_table,
+ .probe = dwxgmac_brcm_pci_probe,
+ .remove = dwxgmac_brcm_pci_remove,
+ .driver = {
+ .pm = &dwxgmac_brcm_pm_ops,
+ },
+};
+
+module_pci_driver(dwxgmac_brcm_pci_driver);
+
+MODULE_DESCRIPTION("Broadcom 10G Automotive Ethernet PCIe driver");
+MODULE_LICENSE("GPL");
--
2.25.1
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