From 165475779ba1d4758429f48d65960473df9dc35a Mon Sep 17 00:00:00 2001 From: Sunil Goutham Date: Mon, 27 Jan 2020 18:35:15 +0530 Subject: [PATCH] octeontx2-pf: Add Marvell OcteonTX2 NIC driver This patch adds template for the Marvell's OcteonTX2 network controller's physical function driver. Just the probe, PCI specific initialization and netdev registration. Signed-off-by: Sunil Goutham Signed-off-by: David S. Miller --- .../net/ethernet/marvell/octeontx2/Kconfig | 8 + .../net/ethernet/marvell/octeontx2/Makefile | 2 + .../ethernet/marvell/octeontx2/nic/Makefile | 10 + .../marvell/octeontx2/nic/otx2_common.h | 77 +++++++ .../ethernet/marvell/octeontx2/nic/otx2_pf.c | 214 ++++++++++++++++++ .../ethernet/marvell/octeontx2/nic/otx2_reg.h | 51 +++++ 6 files changed, 362 insertions(+) create mode 100644 drivers/net/ethernet/marvell/octeontx2/nic/Makefile create mode 100644 drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h create mode 100644 drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c create mode 100644 drivers/net/ethernet/marvell/octeontx2/nic/otx2_reg.h diff --git a/drivers/net/ethernet/marvell/octeontx2/Kconfig b/drivers/net/ethernet/marvell/octeontx2/Kconfig index fb34fbd62088..ced514c05c97 100644 --- a/drivers/net/ethernet/marvell/octeontx2/Kconfig +++ b/drivers/net/ethernet/marvell/octeontx2/Kconfig @@ -25,3 +25,11 @@ config NDC_DIS_DYNAMIC_CACHING This config option disables caching of dynamic entries such as NIX SQEs , NPA stack pages etc in NDC. Also locks down NIX SQ/CQ/RQ/RSS and NPA Aura/Pool contexts. + +config OCTEONTX2_PF + tristate "Marvell OcteonTX2 NIC Physical Function driver" + select OCTEONTX2_MBOX + depends on (64BIT && COMPILE_TEST) || ARM64 + depends on PCI + help + This driver supports Marvell's OcteonTX2 NIC physical function. diff --git a/drivers/net/ethernet/marvell/octeontx2/Makefile b/drivers/net/ethernet/marvell/octeontx2/Makefile index e579dcd54c97..0064a69e0f72 100644 --- a/drivers/net/ethernet/marvell/octeontx2/Makefile +++ b/drivers/net/ethernet/marvell/octeontx2/Makefile @@ -3,4 +3,6 @@ # Makefile for Marvell OcteonTX2 device drivers. # +obj-$(CONFIG_OCTEONTX2_MBOX) += af/ obj-$(CONFIG_OCTEONTX2_AF) += af/ +obj-$(CONFIG_OCTEONTX2_PF) += nic/ diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/Makefile b/drivers/net/ethernet/marvell/octeontx2/nic/Makefile new file mode 100644 index 000000000000..622b803e1a5d --- /dev/null +++ b/drivers/net/ethernet/marvell/octeontx2/nic/Makefile @@ -0,0 +1,10 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for Marvell's OcteonTX2 ethernet device drivers +# + +obj-$(CONFIG_OCTEONTX2_PF) += octeontx2_nicpf.o + +octeontx2_nicpf-y := otx2_pf.o + +ccflags-y += -I$(srctree)/drivers/net/ethernet/marvell/octeontx2/af diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h new file mode 100644 index 000000000000..9d52ab364471 --- /dev/null +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h @@ -0,0 +1,77 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Marvell OcteonTx2 RVU Ethernet driver + * + * Copyright (C) 2020 Marvell International Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef OTX2_COMMON_H +#define OTX2_COMMON_H + +#include + +#include "otx2_reg.h" + +/* PCI device IDs */ +#define PCI_DEVID_OCTEONTX2_RVU_PF 0xA063 + +/* PCI BAR nos */ +#define PCI_CFG_REG_BAR_NUM 2 + +struct otx2_hw { + struct pci_dev *pdev; + u16 rx_queues; + u16 tx_queues; + u16 max_queues; +}; + +struct otx2_nic { + void __iomem *reg_base; + struct net_device *netdev; + + struct otx2_hw hw; + struct pci_dev *pdev; + struct device *dev; +}; + +/* Register read/write APIs */ +static inline void __iomem *otx2_get_regaddr(struct otx2_nic *nic, u64 offset) +{ + u64 blkaddr; + + switch ((offset >> RVU_FUNC_BLKADDR_SHIFT) & RVU_FUNC_BLKADDR_MASK) { + case BLKTYPE_NIX: + blkaddr = BLKADDR_NIX0; + break; + case BLKTYPE_NPA: + blkaddr = BLKADDR_NPA; + break; + default: + blkaddr = BLKADDR_RVUM; + break; + }; + + offset &= ~(RVU_FUNC_BLKADDR_MASK << RVU_FUNC_BLKADDR_SHIFT); + offset |= (blkaddr << RVU_FUNC_BLKADDR_SHIFT); + + return nic->reg_base + offset; +} + +static inline void otx2_write64(struct otx2_nic *nic, u64 offset, u64 val) +{ + void __iomem *addr = otx2_get_regaddr(nic, offset); + + writeq(val, addr); +} + +static inline u64 otx2_read64(struct otx2_nic *nic, u64 offset) +{ + void __iomem *addr = otx2_get_regaddr(nic, offset); + + return readq(addr); +} + +#endif /* OTX2_COMMON_H */ diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c new file mode 100644 index 000000000000..d3af2006ce3c --- /dev/null +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c @@ -0,0 +1,214 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Marvell OcteonTx2 RVU Physcial Function ethernet driver + * + * Copyright (C) 2020 Marvell International Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "otx2_common.h" + +#define DRV_NAME "octeontx2-nicpf" +#define DRV_STRING "Marvell OcteonTX2 NIC Physical Function Driver" +#define DRV_VERSION "1.0" + +/* Supported devices */ +static const struct pci_device_id otx2_pf_id_table[] = { + { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVID_OCTEONTX2_RVU_PF) }, + { 0, } /* end of table */ +}; + +MODULE_AUTHOR("Marvell International Ltd."); +MODULE_DESCRIPTION(DRV_STRING); +MODULE_LICENSE("GPL v2"); +MODULE_VERSION(DRV_VERSION); +MODULE_DEVICE_TABLE(pci, otx2_pf_id_table); + +static int otx2_set_real_num_queues(struct net_device *netdev, + int tx_queues, int rx_queues) +{ + int err; + + err = netif_set_real_num_tx_queues(netdev, tx_queues); + if (err) { + netdev_err(netdev, + "Failed to set no of Tx queues: %d\n", tx_queues); + return err; + } + + err = netif_set_real_num_rx_queues(netdev, rx_queues); + if (err) + netdev_err(netdev, + "Failed to set no of Rx queues: %d\n", rx_queues); + return err; +} + +static int otx2_open(struct net_device *netdev) +{ + netif_carrier_off(netdev); + + return 0; +} + +static int otx2_stop(struct net_device *netdev) +{ + return 0; +} + +static const struct net_device_ops otx2_netdev_ops = { + .ndo_open = otx2_open, + .ndo_stop = otx2_stop, +}; + +static int otx2_check_pf_usable(struct otx2_nic *nic) +{ + u64 rev; + + rev = otx2_read64(nic, RVU_PF_BLOCK_ADDRX_DISC(BLKADDR_RVUM)); + rev = (rev >> 12) & 0xFF; + /* Check if AF has setup revision for RVUM block, + * otherwise this driver probe should be deferred + * until AF driver comes up. + */ + if (!rev) { + dev_warn(nic->dev, + "AF is not initialized, deferring probe\n"); + return -EPROBE_DEFER; + } + return 0; +} + +static int otx2_probe(struct pci_dev *pdev, const struct pci_device_id *id) +{ + struct device *dev = &pdev->dev; + struct net_device *netdev; + struct otx2_nic *pf; + struct otx2_hw *hw; + int err, qcount; + + err = pcim_enable_device(pdev); + if (err) { + dev_err(dev, "Failed to enable PCI device\n"); + return err; + } + + err = pci_request_regions(pdev, DRV_NAME); + if (err) { + dev_err(dev, "PCI request regions failed 0x%x\n", err); + return err; + } + + err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48)); + if (err) { + dev_err(dev, "DMA mask config failed, abort\n"); + goto err_release_regions; + } + + pci_set_master(pdev); + + /* Set number of queues */ + qcount = min_t(int, num_online_cpus(), num_online_cpus()); + + netdev = alloc_etherdev_mqs(sizeof(*pf), qcount, qcount); + if (!netdev) { + err = -ENOMEM; + goto err_release_regions; + } + + pci_set_drvdata(pdev, netdev); + SET_NETDEV_DEV(netdev, &pdev->dev); + pf = netdev_priv(netdev); + pf->netdev = netdev; + pf->pdev = pdev; + pf->dev = dev; + + hw = &pf->hw; + hw->pdev = pdev; + hw->rx_queues = qcount; + hw->tx_queues = qcount; + hw->max_queues = qcount; + + /* Map CSRs */ + pf->reg_base = pcim_iomap(pdev, PCI_CFG_REG_BAR_NUM, 0); + if (!pf->reg_base) { + dev_err(dev, "Unable to map physical function CSRs, aborting\n"); + err = -ENOMEM; + goto err_free_netdev; + } + + err = otx2_check_pf_usable(pf); + if (err) + goto err_free_netdev; + + err = otx2_set_real_num_queues(netdev, hw->tx_queues, hw->rx_queues); + if (err) + goto err_free_netdev; + + netdev->netdev_ops = &otx2_netdev_ops; + + err = register_netdev(netdev); + if (err) { + dev_err(dev, "Failed to register netdevice\n"); + goto err_free_netdev; + } + + return 0; + +err_free_netdev: + pci_set_drvdata(pdev, NULL); + free_netdev(netdev); +err_release_regions: + pci_release_regions(pdev); + return err; +} + +static void otx2_remove(struct pci_dev *pdev) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct otx2_nic *pf; + + if (!netdev) + return; + + pf = netdev_priv(netdev); + + unregister_netdev(netdev); + pci_free_irq_vectors(pf->pdev); + pci_set_drvdata(pdev, NULL); + free_netdev(netdev); + pci_release_regions(pdev); +} + +static struct pci_driver otx2_pf_driver = { + .name = DRV_NAME, + .id_table = otx2_pf_id_table, + .probe = otx2_probe, + .shutdown = otx2_remove, + .remove = otx2_remove, +}; + +static int __init otx2_rvupf_init_module(void) +{ + pr_info("%s: %s\n", DRV_NAME, DRV_STRING); + + return pci_register_driver(&otx2_pf_driver); +} + +static void __exit otx2_rvupf_cleanup_module(void) +{ + pci_unregister_driver(&otx2_pf_driver); +} + +module_init(otx2_rvupf_init_module); +module_exit(otx2_rvupf_cleanup_module); diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_reg.h b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_reg.h new file mode 100644 index 000000000000..d0bd64ab4f1a --- /dev/null +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_reg.h @@ -0,0 +1,51 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Marvell OcteonTx2 RVU Ethernet driver + * + * Copyright (C) 2020 Marvell International Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef OTX2_REG_H +#define OTX2_REG_H + +#include + +/* RVU PF registers */ +#define RVU_PF_VFX_PFVF_MBOX0 (0x00000) +#define RVU_PF_VFX_PFVF_MBOX1 (0x00008) +#define RVU_PF_VFX_PFVF_MBOXX(a, b) (0x0 | (a) << 12 | (b) << 3) +#define RVU_PF_VF_BAR4_ADDR (0x10) +#define RVU_PF_BLOCK_ADDRX_DISC(a) (0x200 | (a) << 3) +#define RVU_PF_VFME_STATUSX(a) (0x800 | (a) << 3) +#define RVU_PF_VFTRPENDX(a) (0x820 | (a) << 3) +#define RVU_PF_VFTRPEND_W1SX(a) (0x840 | (a) << 3) +#define RVU_PF_VFPF_MBOX_INTX(a) (0x880 | (a) << 3) +#define RVU_PF_VFPF_MBOX_INT_W1SX(a) (0x8A0 | (a) << 3) +#define RVU_PF_VFPF_MBOX_INT_ENA_W1SX(a) (0x8C0 | (a) << 3) +#define RVU_PF_VFPF_MBOX_INT_ENA_W1CX(a) (0x8E0 | (a) << 3) +#define RVU_PF_VFFLR_INTX(a) (0x900 | (a) << 3) +#define RVU_PF_VFFLR_INT_W1SX(a) (0x920 | (a) << 3) +#define RVU_PF_VFFLR_INT_ENA_W1SX(a) (0x940 | (a) << 3) +#define RVU_PF_VFFLR_INT_ENA_W1CX(a) (0x960 | (a) << 3) +#define RVU_PF_VFME_INTX(a) (0x980 | (a) << 3) +#define RVU_PF_VFME_INT_W1SX(a) (0x9A0 | (a) << 3) +#define RVU_PF_VFME_INT_ENA_W1SX(a) (0x9C0 | (a) << 3) +#define RVU_PF_VFME_INT_ENA_W1CX(a) (0x9E0 | (a) << 3) +#define RVU_PF_PFAF_MBOX0 (0xC00) +#define RVU_PF_PFAF_MBOX1 (0xC08) +#define RVU_PF_PFAF_MBOXX(a) (0xC00 | (a) << 3) +#define RVU_PF_INT (0xc20) +#define RVU_PF_INT_W1S (0xc28) +#define RVU_PF_INT_ENA_W1S (0xc30) +#define RVU_PF_INT_ENA_W1C (0xc38) +#define RVU_PF_MSIX_VECX_ADDR(a) (0x000 | (a) << 4) +#define RVU_PF_MSIX_VECX_CTL(a) (0x008 | (a) << 4) +#define RVU_PF_MSIX_PBAX(a) (0xF0000 | (a) << 3) + +#define RVU_FUNC_BLKADDR_SHIFT 20 +#define RVU_FUNC_BLKADDR_MASK 0x1FULL + +#endif /* OTX2_REG_H */