From 2633beb99b81f4dd005f99aabd98c8afa056c528 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Thu, 9 Feb 2017 09:17:28 -0800 Subject: nfp: rename the driver and add new main file Support for the PF driver is about to be added and will share much of the code. When the VF driver was added we planned to maintain the PF driver as a separate module but have decided that for our simple use case just maintaining a single module is more reasonable. Rename the driver to just "nfp" and update the Kconfig. While at it remove latent references to NFP3200. Signed-off-by: Jakub Kicinski Signed-off-by: David S. Miller --- drivers/net/ethernet/netronome/nfp/nfp_main.h | 48 +++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_main.h (limited to 'drivers/net/ethernet/netronome/nfp/nfp_main.h') diff --git a/drivers/net/ethernet/netronome/nfp/nfp_main.h b/drivers/net/ethernet/netronome/nfp/nfp_main.h new file mode 100644 index 000000000000..371ae2731909 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_main.h @@ -0,0 +1,48 @@ +/* + * Copyright (C) 2015-2017 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * nfp_main.h + * Author: Jason McMullan + */ + +#ifndef NFP_MAIN_H +#define NFP_MAIN_H + +#include +#include +#include + +extern struct pci_driver nfp_netvf_pci_driver; + +#endif /* NFP_MAIN_H */ -- cgit v1.2.3 From 63461a028f761f8e45d22d06fb7e7468def024b7 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Thu, 9 Feb 2017 09:17:38 -0800 Subject: nfp: add the PF driver Add PF driver for NFP4000 and NFP6000. Signed-off-by: Jakub Kicinski Signed-off-by: David S. Miller --- drivers/net/ethernet/netronome/nfp/Makefile | 1 + drivers/net/ethernet/netronome/nfp/nfp_main.c | 332 +++++++++++- drivers/net/ethernet/netronome/nfp/nfp_main.h | 49 ++ drivers/net/ethernet/netronome/nfp/nfp_net.h | 26 +- drivers/net/ethernet/netronome/nfp/nfp_net_main.c | 585 ++++++++++++++++++++++ 5 files changed, 970 insertions(+), 23 deletions(-) create mode 100644 drivers/net/ethernet/netronome/nfp/nfp_net_main.c (limited to 'drivers/net/ethernet/netronome/nfp/nfp_main.h') diff --git a/drivers/net/ethernet/netronome/nfp/Makefile b/drivers/net/ethernet/netronome/nfp/Makefile index eab39aec5b24..6933afa69df2 100644 --- a/drivers/net/ethernet/netronome/nfp/Makefile +++ b/drivers/net/ethernet/netronome/nfp/Makefile @@ -16,6 +16,7 @@ nfp-objs := \ nfp_net_common.o \ nfp_net_ethtool.o \ nfp_net_offload.o \ + nfp_net_main.o \ nfp_netvf_main.o ifeq ($(CONFIG_BPF_SYSCALL),y) diff --git a/drivers/net/ethernet/netronome/nfp/nfp_main.c b/drivers/net/ethernet/netronome/nfp/nfp_main.c index cc6d75fff005..6e1bb3a4a611 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_main.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_main.c @@ -45,12 +45,326 @@ #include #include +#include "nfpcore/nfp.h" +#include "nfpcore/nfp_cpp.h" +#include "nfpcore/nfp_nsp_eth.h" + +#include "nfpcore/nfp6000_pcie.h" + #include "nfp_main.h" #include "nfp_net.h" static const char nfp_driver_name[] = "nfp"; const char nfp_driver_version[] = VERMAGIC_STRING; +static const struct pci_device_id nfp_pci_device_ids[] = { + { PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_NFP6000, + PCI_VENDOR_ID_NETRONOME, PCI_ANY_ID, + PCI_ANY_ID, 0, + }, + { PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_NFP4000, + PCI_VENDOR_ID_NETRONOME, PCI_ANY_ID, + PCI_ANY_ID, 0, + }, + { 0, } /* Required last entry. */ +}; +MODULE_DEVICE_TABLE(pci, nfp_pci_device_ids); + +static int nfp_pcie_sriov_enable(struct pci_dev *pdev, int num_vfs) +{ +#ifdef CONFIG_PCI_IOV + struct nfp_pf *pf = pci_get_drvdata(pdev); + int err; + + err = pci_enable_sriov(pdev, num_vfs); + if (err) { + dev_warn(&pdev->dev, "Failed to enable PCI sriov: %d\n", err); + return err; + } + + pf->num_vfs = num_vfs; + + dev_dbg(&pdev->dev, "Created %d VFs.\n", pf->num_vfs); + + return num_vfs; +#endif + return 0; +} + +static int nfp_pcie_sriov_disable(struct pci_dev *pdev) +{ +#ifdef CONFIG_PCI_IOV + struct nfp_pf *pf = pci_get_drvdata(pdev); + + /* If the VFs are assigned we cannot shut down SR-IOV without + * causing issues, so just leave the hardware available but + * disabled + */ + if (pci_vfs_assigned(pdev)) { + dev_warn(&pdev->dev, "Disabling while VFs assigned - VFs will not be deallocated\n"); + return -EPERM; + } + + pf->num_vfs = 0; + + pci_disable_sriov(pdev); + dev_dbg(&pdev->dev, "Removed VFs.\n"); +#endif + return 0; +} + +static int nfp_pcie_sriov_configure(struct pci_dev *pdev, int num_vfs) +{ + if (num_vfs == 0) + return nfp_pcie_sriov_disable(pdev); + else + return nfp_pcie_sriov_enable(pdev, num_vfs); +} + +/** + * nfp_net_fw_find() - Find the correct firmware image for netdev mode + * @pdev: PCI Device structure + * @pf: NFP PF Device structure + * + * Return: firmware if found and requested successfully. + */ +static const struct firmware * +nfp_net_fw_find(struct pci_dev *pdev, struct nfp_pf *pf) +{ + const struct firmware *fw = NULL; + struct nfp_eth_table_port *port; + const char *fw_model; + char fw_name[256]; + int spc, err = 0; + int i, j; + + if (!pf->eth_tbl) { + dev_err(&pdev->dev, "Error: can't identify media config\n"); + return NULL; + } + + fw_model = nfp_hwinfo_lookup(pf->cpp, "assembly.partno"); + if (!fw_model) { + dev_err(&pdev->dev, "Error: can't read part number\n"); + return NULL; + } + + spc = ARRAY_SIZE(fw_name); + spc -= snprintf(fw_name, spc, "netronome/nic_%s", fw_model); + + for (i = 0; spc > 0 && i < pf->eth_tbl->count; i += j) { + port = &pf->eth_tbl->ports[i]; + j = 1; + while (i + j < pf->eth_tbl->count && + port->speed == port[j].speed) + j++; + + spc -= snprintf(&fw_name[ARRAY_SIZE(fw_name) - spc], spc, + "_%dx%d", j, port->speed / 1000); + } + + if (spc <= 0) + return NULL; + + spc -= snprintf(&fw_name[ARRAY_SIZE(fw_name) - spc], spc, ".nffw"); + if (spc <= 0) + return NULL; + + err = request_firmware(&fw, fw_name, &pdev->dev); + if (err) + return NULL; + + dev_info(&pdev->dev, "Loading FW image: %s\n", fw_name); + + return fw; +} + +/** + * nfp_net_fw_load() - Load the firmware image + * @pdev: PCI Device structure + * @pf: NFP PF Device structure + * @nsp: NFP SP handle + * + * Return: -ERRNO, 0 for no firmware loaded, 1 for firmware loaded + */ +static int +nfp_fw_load(struct pci_dev *pdev, struct nfp_pf *pf, struct nfp_nsp *nsp) +{ + const struct firmware *fw; + u16 interface; + int err; + + interface = nfp_cpp_interface(pf->cpp); + if (NFP_CPP_INTERFACE_UNIT_of(interface) != 0) { + /* Only Unit 0 should reset or load firmware */ + dev_info(&pdev->dev, "Firmware will be loaded by partner\n"); + return 0; + } + + fw = nfp_net_fw_find(pdev, pf); + if (!fw) + return 0; + + dev_info(&pdev->dev, "Soft-reset, loading FW image\n"); + err = nfp_nsp_device_soft_reset(nsp); + if (err < 0) { + dev_err(&pdev->dev, "Failed to soft reset the NFP: %d\n", + err); + goto exit_release_fw; + } + + err = nfp_nsp_load_fw(nsp, fw); + + if (err < 0) { + dev_err(&pdev->dev, "FW loading failed: %d\n", err); + goto exit_release_fw; + } + + dev_info(&pdev->dev, "Finished loading FW image\n"); + +exit_release_fw: + release_firmware(fw); + + return err < 0 ? err : 1; +} + +static void nfp_fw_unload(struct nfp_pf *pf) +{ + struct nfp_nsp *nsp; + int err; + + nsp = nfp_nsp_open(pf->cpp); + if (IS_ERR(nsp)) { + nfp_err(pf->cpp, "Reset failed, can't open NSP\n"); + return; + } + + err = nfp_nsp_device_soft_reset(nsp); + if (err < 0) + dev_warn(&pf->pdev->dev, "Couldn't unload firmware: %d\n", err); + else + dev_info(&pf->pdev->dev, "Firmware safely unloaded\n"); + + nfp_nsp_close(nsp); +} + +static int nfp_pci_probe(struct pci_dev *pdev, + const struct pci_device_id *pci_id) +{ + struct nfp_nsp *nsp; + struct nfp_pf *pf; + int err; + + err = pci_enable_device(pdev); + if (err < 0) + return err; + + pci_set_master(pdev); + + err = dma_set_mask_and_coherent(&pdev->dev, + DMA_BIT_MASK(NFP_NET_MAX_DMA_BITS)); + if (err) + goto err_pci_disable; + + err = pci_request_regions(pdev, nfp_driver_name); + if (err < 0) { + dev_err(&pdev->dev, "Unable to reserve pci resources.\n"); + goto err_pci_disable; + } + + pf = kzalloc(sizeof(*pf), GFP_KERNEL); + if (!pf) { + err = -ENOMEM; + goto err_rel_regions; + } + INIT_LIST_HEAD(&pf->ports); + pci_set_drvdata(pdev, pf); + pf->pdev = pdev; + + pf->cpp = nfp_cpp_from_nfp6000_pcie(pdev); + if (IS_ERR_OR_NULL(pf->cpp)) { + err = PTR_ERR(pf->cpp); + if (err >= 0) + err = -ENOMEM; + goto err_disable_msix; + } + + nsp = nfp_nsp_open(pf->cpp); + if (IS_ERR(nsp)) { + err = PTR_ERR(nsp); + goto err_cpp_free; + } + + err = nfp_nsp_wait(nsp); + if (err < 0) { + nfp_nsp_close(nsp); + goto err_cpp_free; + } + + pf->eth_tbl = __nfp_eth_read_ports(pf->cpp, nsp); + + err = nfp_fw_load(pdev, pf, nsp); + nfp_nsp_close(nsp); + if (err < 0) { + dev_err(&pdev->dev, "Failed to load FW\n"); + goto err_eth_tbl_free; + } + + pf->fw_loaded = !!err; + + err = nfp_net_pci_probe(pf); + if (err) + goto err_fw_unload; + + return 0; + +err_fw_unload: + if (pf->fw_loaded) + nfp_fw_unload(pf); +err_eth_tbl_free: + kfree(pf->eth_tbl); +err_cpp_free: + nfp_cpp_free(pf->cpp); +err_disable_msix: + pci_set_drvdata(pdev, NULL); + kfree(pf); +err_rel_regions: + pci_release_regions(pdev); +err_pci_disable: + pci_disable_device(pdev); + + return err; +} + +static void nfp_pci_remove(struct pci_dev *pdev) +{ + struct nfp_pf *pf = pci_get_drvdata(pdev); + + if (!list_empty(&pf->ports)) + nfp_net_pci_remove(pf); + + nfp_pcie_sriov_disable(pdev); + + if (pf->fw_loaded) + nfp_fw_unload(pf); + + pci_set_drvdata(pdev, NULL); + nfp_cpp_free(pf->cpp); + + kfree(pf->eth_tbl); + kfree(pf); + pci_release_regions(pdev); + pci_disable_device(pdev); +} + +static struct pci_driver nfp_pci_driver = { + .name = nfp_driver_name, + .id_table = nfp_pci_device_ids, + .probe = nfp_pci_probe, + .remove = nfp_pci_remove, + .sriov_configure = nfp_pcie_sriov_configure, +}; + static int __init nfp_main_init(void) { int err; @@ -60,12 +374,18 @@ static int __init nfp_main_init(void) nfp_net_debugfs_create(); + err = pci_register_driver(&nfp_pci_driver); + if (err < 0) + goto err_destroy_debugfs; + err = pci_register_driver(&nfp_netvf_pci_driver); if (err) - goto err_destroy_debugfs; + goto err_unreg_pf; return err; +err_unreg_pf: + pci_unregister_driver(&nfp_pci_driver); err_destroy_debugfs: nfp_net_debugfs_destroy(); return err; @@ -74,12 +394,22 @@ err_destroy_debugfs: static void __exit nfp_main_exit(void) { pci_unregister_driver(&nfp_netvf_pci_driver); + pci_unregister_driver(&nfp_pci_driver); nfp_net_debugfs_destroy(); } module_init(nfp_main_init); module_exit(nfp_main_exit); +MODULE_FIRMWARE("netronome/nic_AMDA0081-0001_1x40.nffw"); +MODULE_FIRMWARE("netronome/nic_AMDA0081-0001_4x10.nffw"); +MODULE_FIRMWARE("netronome/nic_AMDA0096-0001_2x10.nffw"); +MODULE_FIRMWARE("netronome/nic_AMDA0097-0001_2x40.nffw"); +MODULE_FIRMWARE("netronome/nic_AMDA0097-0001_4x10_1x40.nffw"); +MODULE_FIRMWARE("netronome/nic_AMDA0097-0001_8x10.nffw"); +MODULE_FIRMWARE("netronome/nic_AMDA0099-0001_2x10.nffw"); +MODULE_FIRMWARE("netronome/nic_AMDA0099-0001_2x25.nffw"); + MODULE_AUTHOR("Netronome Systems "); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("The Netronome Flow Processor (NFP) driver."); diff --git a/drivers/net/ethernet/netronome/nfp/nfp_main.h b/drivers/net/ethernet/netronome/nfp/nfp_main.h index 371ae2731909..6c40fa322da3 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_main.h +++ b/drivers/net/ethernet/netronome/nfp/nfp_main.h @@ -39,10 +39,59 @@ #ifndef NFP_MAIN_H #define NFP_MAIN_H +#include #include #include #include +struct dentry; +struct pci_dev; + +struct nfp_cpp; +struct nfp_cpp_area; +struct nfp_eth_table; + +/** + * struct nfp_pf - NFP PF-specific device structure + * @pdev: Backpointer to PCI device + * @cpp: Pointer to the CPP handle + * @ctrl_area: Pointer to the CPP area for the control BAR + * @tx_area: Pointer to the CPP area for the TX queues + * @rx_area: Pointer to the CPP area for the FL/RX queues + * @irq_entries: Array of MSI-X entries for all ports + * @num_vfs: Number of SR-IOV VFs enabled + * @fw_loaded: Is the firmware loaded? + * @eth_tbl: NSP ETH table + * @ddir: Per-device debugfs directory + * @num_ports: Number of adapter ports + * @ports: Linked list of port structures (struct nfp_net) + */ +struct nfp_pf { + struct pci_dev *pdev; + + struct nfp_cpp *cpp; + + struct nfp_cpp_area *ctrl_area; + struct nfp_cpp_area *tx_area; + struct nfp_cpp_area *rx_area; + + struct msix_entry *irq_entries; + + unsigned int num_vfs; + + bool fw_loaded; + + struct nfp_eth_table *eth_tbl; + + struct dentry *ddir; + + unsigned int num_ports; + struct list_head ports; +}; + extern struct pci_driver nfp_netvf_pci_driver; +int nfp_net_pci_probe(struct nfp_pf *pf); +void nfp_net_pci_remove(struct nfp_pf *pf); + #endif /* NFP_MAIN_H */ diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net.h b/drivers/net/ethernet/netronome/nfp/nfp_net.h index ef031010ae09..d37d2391b4fe 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net.h +++ b/drivers/net/ethernet/netronome/nfp/nfp_net.h @@ -43,6 +43,7 @@ #define _NFP_NET_H_ #include +#include #include #include #include @@ -434,20 +435,13 @@ struct nfp_stat_pair { * struct nfp_net - NFP network device structure * @pdev: Backpointer to PCI device * @netdev: Backpointer to net_device structure - * @nfp_fallback: Is the driver used in fallback mode? * @is_vf: Is the driver attached to a VF? - * @fw_loaded: Is the firmware loaded? * @bpf_offload_skip_sw: Offloaded BPF program will not be rerun by cls_bpf * @bpf_offload_xdp: Offloaded BPF program is XDP * @ctrl: Local copy of the control register/word. * @fl_bufsz: Currently configured size of the freelist buffers * @rx_offset: Offset in the RX buffers where packet data starts * @xdp_prog: Installed XDP program - * @cpp: Pointer to the CPP handle - * @nfp_dev_cpp: Pointer to the NFP Device handle - * @ctrl_area: Pointer to the CPP area for the control BAR - * @tx_area: Pointer to the CPP area for the TX queues - * @rx_area: Pointer to the CPP area for the FL/RX queues * @fw_ver: Firmware version * @cap: Capabilities advertised by the Firmware * @max_mtu: Maximum support MTU advertised by the Firmware @@ -497,14 +491,13 @@ struct nfp_stat_pair { * @tx_bar: Pointer to mapped TX queues * @rx_bar: Pointer to mapped FL/RX queues * @debugfs_dir: Device directory in debugfs + * @port_list: Entry on device port list */ struct nfp_net { struct pci_dev *pdev; struct net_device *netdev; - unsigned nfp_fallback:1; unsigned is_vf:1; - unsigned fw_loaded:1; unsigned bpf_offload_skip_sw:1; unsigned bpf_offload_xdp:1; @@ -518,18 +511,6 @@ struct nfp_net { struct nfp_net_tx_ring *tx_rings; struct nfp_net_rx_ring *rx_rings; -#ifdef CONFIG_PCI_IOV - unsigned int num_vfs; - struct vf_data_storage *vfinfo; - int vf_rate_link_speed; -#endif - - struct nfp_cpp *cpp; - struct platform_device *nfp_dev_cpp; - struct nfp_cpp_area *ctrl_area; - struct nfp_cpp_area *tx_area; - struct nfp_cpp_area *rx_area; - struct nfp_net_fw_version fw_ver; u32 cap; u32 max_mtu; @@ -592,11 +573,12 @@ struct nfp_net { u8 __iomem *qcp_cfg; u8 __iomem *ctrl_bar; - u8 __iomem *q_bar; u8 __iomem *tx_bar; u8 __iomem *rx_bar; struct dentry *debugfs_dir; + + struct list_head port_list; }; struct nfp_net_ring_set { diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_main.c b/drivers/net/ethernet/netronome/nfp/nfp_net_main.c new file mode 100644 index 000000000000..eccd31003b0d --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_main.c @@ -0,0 +1,585 @@ +/* + * Copyright (C) 2015-2017 Netronome Systems, Inc. + * + * This software is dual licensed under the GNU General License Version 2, + * June 1991 as shown in the file COPYING in the top-level directory of this + * source tree or the BSD 2-Clause License provided below. You have the + * option to license this software under the complete terms of either license. + * + * The BSD 2-Clause License: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * 1. Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * nfp_net_main.c + * Netronome network device driver: Main entry point + * Authors: Jakub Kicinski + * Alejandro Lucero + * Jason McMullan + * Rolf Neugebauer + */ + +#include +#include +#include +#include +#include +#include +#include + +#include "nfpcore/nfp.h" +#include "nfpcore/nfp_cpp.h" +#include "nfpcore/nfp_nffw.h" +#include "nfpcore/nfp_nsp_eth.h" +#include "nfpcore/nfp6000_pcie.h" + +#include "nfp_net_ctrl.h" +#include "nfp_net.h" +#include "nfp_main.h" + +#define NFP_PF_CSR_SLICE_SIZE (32 * 1024) + +static int nfp_is_ready(struct nfp_cpp *cpp) +{ + const char *cp; + long state; + int err; + + cp = nfp_hwinfo_lookup(cpp, "board.state"); + if (!cp) + return 0; + + err = kstrtol(cp, 0, &state); + if (err < 0) + return 0; + + return state == 15; +} + +/** + * nfp_net_map_area() - Help function to map an area + * @cpp: NFP CPP handler + * @name: Name for the area + * @target: CPP target + * @addr: CPP address + * @size: Size of the area + * @area: Area handle (returned). + * + * This function is primarily to simplify the code in the main probe + * function. To undo the effect of this functions call + * @nfp_cpp_area_release_free(*area); + * + * Return: Pointer to memory mapped area or ERR_PTR + */ +static u8 __iomem *nfp_net_map_area(struct nfp_cpp *cpp, + const char *name, int isl, int target, + unsigned long long addr, unsigned long size, + struct nfp_cpp_area **area) +{ + u8 __iomem *res; + u32 dest; + int err; + + dest = NFP_CPP_ISLAND_ID(target, NFP_CPP_ACTION_RW, 0, isl); + + *area = nfp_cpp_area_alloc_with_name(cpp, dest, name, addr, size); + if (!*area) { + err = -EIO; + goto err_area; + } + + err = nfp_cpp_area_acquire(*area); + if (err < 0) + goto err_acquire; + + res = nfp_cpp_area_iomem(*area); + if (!res) { + err = -EIO; + goto err_map; + } + + return res; + +err_map: + nfp_cpp_area_release(*area); +err_acquire: + nfp_cpp_area_free(*area); +err_area: + return (u8 __iomem *)ERR_PTR(err); +} + +static void +nfp_net_get_mac_addr_hwinfo(struct nfp_net *nn, struct nfp_cpp *cpp, + unsigned int id) +{ + u8 mac_addr[ETH_ALEN]; + const char *mac_str; + char name[32]; + + snprintf(name, sizeof(name), "eth%d.mac", id); + + mac_str = nfp_hwinfo_lookup(cpp, name); + if (!mac_str) { + dev_warn(&nn->pdev->dev, + "Can't lookup MAC address. Generate\n"); + eth_hw_addr_random(nn->netdev); + return; + } + + if (sscanf(mac_str, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", + &mac_addr[0], &mac_addr[1], &mac_addr[2], + &mac_addr[3], &mac_addr[4], &mac_addr[5]) != 6) { + dev_warn(&nn->pdev->dev, + "Can't parse MAC address (%s). Generate.\n", mac_str); + eth_hw_addr_random(nn->netdev); + return; + } + + ether_addr_copy(nn->netdev->dev_addr, mac_addr); + ether_addr_copy(nn->netdev->perm_addr, mac_addr); +} + +/** + * nfp_net_get_mac_addr() - Get the MAC address. + * @nn: NFP Network structure + * @pf: NFP PF device structure + * @id: NFP port id + * + * First try to get the MAC address from NSP ETH table. If that + * fails try HWInfo. As a last resort generate a random address. + */ +static void +nfp_net_get_mac_addr(struct nfp_net *nn, struct nfp_pf *pf, unsigned int id) +{ + int i; + + for (i = 0; pf->eth_tbl && i < pf->eth_tbl->count; i++) + if (pf->eth_tbl->ports[i].eth_index == id) { + const u8 *mac_addr = pf->eth_tbl->ports[i].mac_addr; + + ether_addr_copy(nn->netdev->dev_addr, mac_addr); + ether_addr_copy(nn->netdev->perm_addr, mac_addr); + return; + } + + nfp_net_get_mac_addr_hwinfo(nn, pf->cpp, id); +} + +static unsigned int nfp_net_pf_get_num_ports(struct nfp_pf *pf) +{ + char name[256]; + u16 interface; + int pcie_pf; + int err = 0; + u64 val; + + interface = nfp_cpp_interface(pf->cpp); + pcie_pf = NFP_CPP_INTERFACE_UNIT_of(interface); + + snprintf(name, sizeof(name), "nfd_cfg_pf%d_num_ports", pcie_pf); + + val = nfp_rtsym_read_le(pf->cpp, name, &err); + /* Default to one port */ + if (err) { + if (err != -ENOENT) + nfp_err(pf->cpp, "Unable to read adapter port count\n"); + val = 1; + } + + return val; +} + +static unsigned int +nfp_net_pf_total_qcs(struct nfp_pf *pf, void __iomem *ctrl_bar, + unsigned int stride, u32 start_off, u32 num_off) +{ + unsigned int i, min_qc, max_qc; + + min_qc = readl(ctrl_bar + start_off); + max_qc = min_qc; + + for (i = 0; i < pf->num_ports; i++) { + /* To make our lives simpler only accept configuration where + * queues are allocated to PFs in order (queues of PFn all have + * indexes lower than PFn+1). + */ + if (max_qc > readl(ctrl_bar + start_off)) + return 0; + + max_qc = readl(ctrl_bar + start_off); + max_qc += readl(ctrl_bar + num_off) * stride; + ctrl_bar += NFP_PF_CSR_SLICE_SIZE; + } + + return max_qc - min_qc; +} + +static u8 __iomem *nfp_net_pf_map_ctrl_bar(struct nfp_pf *pf) +{ + const struct nfp_rtsym *ctrl_sym; + u8 __iomem *ctrl_bar; + char pf_symbol[256]; + u16 interface; + int pcie_pf; + + interface = nfp_cpp_interface(pf->cpp); + pcie_pf = NFP_CPP_INTERFACE_UNIT_of(interface); + + snprintf(pf_symbol, sizeof(pf_symbol), "_pf%d_net_bar0", pcie_pf); + + ctrl_sym = nfp_rtsym_lookup(pf->cpp, pf_symbol); + if (!ctrl_sym) { + dev_err(&pf->pdev->dev, + "Failed to find PF BAR0 symbol %s\n", pf_symbol); + return NULL; + } + + if (ctrl_sym->size < pf->num_ports * NFP_PF_CSR_SLICE_SIZE) { + dev_err(&pf->pdev->dev, + "PF BAR0 too small to contain %d ports\n", + pf->num_ports); + return NULL; + } + + ctrl_bar = nfp_net_map_area(pf->cpp, "net.ctrl", + ctrl_sym->domain, ctrl_sym->target, + ctrl_sym->addr, ctrl_sym->size, + &pf->ctrl_area); + if (IS_ERR(ctrl_bar)) { + dev_err(&pf->pdev->dev, "Failed to map PF BAR0: %ld\n", + PTR_ERR(ctrl_bar)); + return NULL; + } + + return ctrl_bar; +} + +static void nfp_net_pf_free_netdevs(struct nfp_pf *pf) +{ + struct nfp_net *nn; + + while (!list_empty(&pf->ports)) { + nn = list_first_entry(&pf->ports, struct nfp_net, port_list); + list_del(&nn->port_list); + + nfp_net_netdev_free(nn); + } +} + +static struct nfp_net * +nfp_net_pf_alloc_port_netdev(struct nfp_pf *pf, void __iomem *ctrl_bar, + void __iomem *tx_bar, void __iomem *rx_bar, + int stride, struct nfp_net_fw_version *fw_ver) +{ + u32 n_tx_rings, n_rx_rings; + struct nfp_net *nn; + + n_tx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_TXRINGS); + n_rx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_RXRINGS); + + /* Allocate and initialise the netdev */ + nn = nfp_net_netdev_alloc(pf->pdev, n_tx_rings, n_rx_rings); + if (IS_ERR(nn)) + return nn; + + nn->fw_ver = *fw_ver; + nn->ctrl_bar = ctrl_bar; + nn->tx_bar = tx_bar; + nn->rx_bar = rx_bar; + nn->is_vf = 0; + nn->stride_rx = stride; + nn->stride_tx = stride; + + return nn; +} + +static int +nfp_net_pf_init_port_netdev(struct nfp_pf *pf, struct nfp_net *nn, + unsigned int id) +{ + int err; + + /* Get MAC address */ + nfp_net_get_mac_addr(nn, pf, id); + + /* Get ME clock frequency from ctrl BAR + * XXX for now frequency is hardcoded until we figure out how + * to get the value from nfp-hwinfo into ctrl bar + */ + nn->me_freq_mhz = 1200; + + err = nfp_net_netdev_init(nn->netdev); + if (err) + return err; + + nfp_net_debugfs_port_add(nn, pf->ddir, id); + + nfp_net_info(nn); + + return 0; +} + +static int +nfp_net_pf_alloc_netdevs(struct nfp_pf *pf, void __iomem *ctrl_bar, + void __iomem *tx_bar, void __iomem *rx_bar, + int stride, struct nfp_net_fw_version *fw_ver) +{ + u32 prev_tx_base, prev_rx_base, tgt_tx_base, tgt_rx_base; + struct nfp_net *nn; + unsigned int i; + int err; + + prev_tx_base = readl(ctrl_bar + NFP_NET_CFG_START_TXQ); + prev_rx_base = readl(ctrl_bar + NFP_NET_CFG_START_RXQ); + + for (i = 0; i < pf->num_ports; i++) { + tgt_tx_base = readl(ctrl_bar + NFP_NET_CFG_START_TXQ); + tgt_rx_base = readl(ctrl_bar + NFP_NET_CFG_START_RXQ); + tx_bar += (tgt_tx_base - prev_tx_base) * NFP_QCP_QUEUE_ADDR_SZ; + rx_bar += (tgt_rx_base - prev_rx_base) * NFP_QCP_QUEUE_ADDR_SZ; + prev_tx_base = tgt_tx_base; + prev_rx_base = tgt_rx_base; + + nn = nfp_net_pf_alloc_port_netdev(pf, ctrl_bar, tx_bar, rx_bar, + stride, fw_ver); + if (IS_ERR(nn)) { + err = PTR_ERR(nn); + goto err_free_prev; + } + list_add_tail(&nn->port_list, &pf->ports); + + ctrl_bar += NFP_PF_CSR_SLICE_SIZE; + } + + return 0; + +err_free_prev: + nfp_net_pf_free_netdevs(pf); + return err; +} + +static int +nfp_net_pf_spawn_netdevs(struct nfp_pf *pf, + void __iomem *ctrl_bar, void __iomem *tx_bar, + void __iomem *rx_bar, int stride, + struct nfp_net_fw_version *fw_ver) +{ + unsigned int id, wanted_irqs, num_irqs, ports_left, irqs_left; + struct nfp_net *nn; + int err; + + /* Allocate the netdevs and do basic init */ + err = nfp_net_pf_alloc_netdevs(pf, ctrl_bar, tx_bar, rx_bar, + stride, fw_ver); + if (err) + return err; + + /* Get MSI-X vectors */ + wanted_irqs = 0; + list_for_each_entry(nn, &pf->ports, port_list) + wanted_irqs += NFP_NET_NON_Q_VECTORS + nn->num_r_vecs; + pf->irq_entries = kcalloc(wanted_irqs, sizeof(*pf->irq_entries), + GFP_KERNEL); + if (!pf->irq_entries) { + err = -ENOMEM; + goto err_nn_free; + } + + num_irqs = nfp_net_irqs_alloc(pf->pdev, pf->irq_entries, + NFP_NET_MIN_PORT_IRQS * pf->num_ports, + wanted_irqs); + if (!num_irqs) { + nn_warn(nn, "Unable to allocate MSI-X Vectors. Exiting\n"); + err = -ENOMEM; + goto err_vec_free; + } + + /* Distribute IRQs to ports */ + irqs_left = num_irqs; + ports_left = pf->num_ports; + list_for_each_entry(nn, &pf->ports, port_list) { + unsigned int n; + + n = DIV_ROUND_UP(irqs_left, ports_left); + nfp_net_irqs_assign(nn, &pf->irq_entries[num_irqs - irqs_left], + n); + irqs_left -= n; + ports_left--; + } + + /* Finish netdev init and register */ + id = 0; + list_for_each_entry(nn, &pf->ports, port_list) { + err = nfp_net_pf_init_port_netdev(pf, nn, id); + if (err) + goto err_prev_deinit; + + id++; + } + + return 0; + +err_prev_deinit: + list_for_each_entry_continue_reverse(nn, &pf->ports, port_list) { + nfp_net_debugfs_dir_clean(&nn->debugfs_dir); + nfp_net_netdev_clean(nn->netdev); + } + nfp_net_irqs_disable(pf->pdev); +err_vec_free: + kfree(pf->irq_entries); +err_nn_free: + nfp_net_pf_free_netdevs(pf); + return err; +} + +/* + * PCI device functions + */ +int nfp_net_pci_probe(struct nfp_pf *pf) +{ + u8 __iomem *ctrl_bar, *tx_bar, *rx_bar; + u32 total_tx_qcs, total_rx_qcs; + struct nfp_net_fw_version fw_ver; + u32 tx_area_sz, rx_area_sz; + u32 start_q; + int stride; + int err; + + /* Verify that the board has completed initialization */ + if (!nfp_is_ready(pf->cpp)) { + nfp_err(pf->cpp, "NFP is not ready for NIC operation.\n"); + return -EINVAL; + } + + pf->num_ports = nfp_net_pf_get_num_ports(pf); + + ctrl_bar = nfp_net_pf_map_ctrl_bar(pf); + if (!ctrl_bar) + return pf->fw_loaded ? -EINVAL : -EPROBE_DEFER; + + nfp_net_get_fw_version(&fw_ver, ctrl_bar); + if (fw_ver.resv || fw_ver.class != NFP_NET_CFG_VERSION_CLASS_GENERIC) { + nfp_err(pf->cpp, "Unknown Firmware ABI %d.%d.%d.%d\n", + fw_ver.resv, fw_ver.class, fw_ver.major, fw_ver.minor); + err = -EINVAL; + goto err_ctrl_unmap; + } + + /* Determine stride */ + if (nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 1)) { + stride = 2; + nfp_warn(pf->cpp, "OBSOLETE Firmware detected - VF isolation not available\n"); + } else { + switch (fw_ver.major) { + case 1 ... 4: + stride = 4; + break; + default: + nfp_err(pf->cpp, "Unsupported Firmware ABI %d.%d.%d.%d\n", + fw_ver.resv, fw_ver.class, + fw_ver.major, fw_ver.minor); + err = -EINVAL; + goto err_ctrl_unmap; + } + } + + /* Find how many QC structs need to be mapped */ + total_tx_qcs = nfp_net_pf_total_qcs(pf, ctrl_bar, stride, + NFP_NET_CFG_START_TXQ, + NFP_NET_CFG_MAX_TXRINGS); + total_rx_qcs = nfp_net_pf_total_qcs(pf, ctrl_bar, stride, + NFP_NET_CFG_START_RXQ, + NFP_NET_CFG_MAX_RXRINGS); + if (!total_tx_qcs || !total_rx_qcs) { + nfp_err(pf->cpp, "Invalid PF QC configuration [%d,%d]\n", + total_tx_qcs, total_rx_qcs); + err = -EINVAL; + goto err_ctrl_unmap; + } + + tx_area_sz = NFP_QCP_QUEUE_ADDR_SZ * total_tx_qcs; + rx_area_sz = NFP_QCP_QUEUE_ADDR_SZ * total_rx_qcs; + + /* Map TX queues */ + start_q = readl(ctrl_bar + NFP_NET_CFG_START_TXQ); + tx_bar = nfp_net_map_area(pf->cpp, "net.tx", 0, 0, + NFP_PCIE_QUEUE(start_q), + tx_area_sz, &pf->tx_area); + if (IS_ERR(tx_bar)) { + nfp_err(pf->cpp, "Failed to map TX area.\n"); + err = PTR_ERR(tx_bar); + goto err_ctrl_unmap; + } + + /* Map RX queues */ + start_q = readl(ctrl_bar + NFP_NET_CFG_START_RXQ); + rx_bar = nfp_net_map_area(pf->cpp, "net.rx", 0, 0, + NFP_PCIE_QUEUE(start_q), + rx_area_sz, &pf->rx_area); + if (IS_ERR(rx_bar)) { + nfp_err(pf->cpp, "Failed to map RX area.\n"); + err = PTR_ERR(rx_bar); + goto err_unmap_tx; + } + + pf->ddir = nfp_net_debugfs_device_add(pf->pdev); + + err = nfp_net_pf_spawn_netdevs(pf, ctrl_bar, tx_bar, rx_bar, + stride, &fw_ver); + if (err) + goto err_clean_ddir; + + return 0; + +err_clean_ddir: + nfp_net_debugfs_dir_clean(&pf->ddir); + nfp_cpp_area_release_free(pf->rx_area); +err_unmap_tx: + nfp_cpp_area_release_free(pf->tx_area); +err_ctrl_unmap: + nfp_cpp_area_release_free(pf->ctrl_area); + return err; +} + +void nfp_net_pci_remove(struct nfp_pf *pf) +{ + struct nfp_net *nn; + + list_for_each_entry(nn, &pf->ports, port_list) { + nfp_net_debugfs_dir_clean(&nn->debugfs_dir); + + nfp_net_netdev_clean(nn->netdev); + } + + nfp_net_pf_free_netdevs(pf); + + nfp_net_debugfs_dir_clean(&pf->ddir); + + nfp_net_irqs_disable(pf->pdev); + kfree(pf->irq_entries); + + nfp_cpp_area_release_free(pf->rx_area); + nfp_cpp_area_release_free(pf->tx_area); + nfp_cpp_area_release_free(pf->ctrl_area); +} -- cgit v1.2.3 From 0bc3827f8c9f74b5335667d70309cefa12ec14ae Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Sun, 19 Feb 2017 11:58:14 -0800 Subject: nfp: allow application firmware to limit number of SR-IOV VFs Some application firmware projects may choose to limit the number of VFs available below what is specified in PCI capability to be able to reuse the PCIe interface resources. There may also be projects which use cases don't require SR-IOV support at all and therefore don't want to spend time implementing/testing it. Check nfd_vf_cfg_max_vfs firmware symbol to see if application firmware is reporting how many VFs it supports. This mechanism is an opt-in, if symbol is not present we will only look at the PCI capability values. Signed-off-by: Jakub Kicinski Signed-off-by: David S. Miller --- drivers/net/ethernet/netronome/nfp/nfp_main.c | 25 +++++++++++++++++++++++++ drivers/net/ethernet/netronome/nfp/nfp_main.h | 2 ++ 2 files changed, 27 insertions(+) (limited to 'drivers/net/ethernet/netronome/nfp/nfp_main.h') diff --git a/drivers/net/ethernet/netronome/nfp/nfp_main.c b/drivers/net/ethernet/netronome/nfp/nfp_main.c index 8cda6b0e7e32..dedac720fb29 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_main.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_main.c @@ -47,6 +47,7 @@ #include "nfpcore/nfp.h" #include "nfpcore/nfp_cpp.h" +#include "nfpcore/nfp_nffw.h" #include "nfpcore/nfp_nsp_eth.h" #include "nfpcore/nfp6000_pcie.h" @@ -70,12 +71,34 @@ static const struct pci_device_id nfp_pci_device_ids[] = { }; MODULE_DEVICE_TABLE(pci, nfp_pci_device_ids); +static void nfp_pcie_sriov_read_nfd_limit(struct nfp_pf *pf) +{ +#ifdef CONFIG_PCI_IOV + int err; + + pf->limit_vfs = nfp_rtsym_read_le(pf->cpp, "nfd_vf_cfg_max_vfs", &err); + if (!err) + return; + + pf->limit_vfs = ~0; + /* Allow any setting for backwards compatibility if symbol not found */ + if (err != -ENOENT) + nfp_warn(pf->cpp, "Warning: VF limit read failed: %d\n", err); +#endif +} + static int nfp_pcie_sriov_enable(struct pci_dev *pdev, int num_vfs) { #ifdef CONFIG_PCI_IOV struct nfp_pf *pf = pci_get_drvdata(pdev); int err; + if (num_vfs > pf->limit_vfs) { + nfp_info(pf->cpp, "Firmware limits number of VFs to %u\n", + pf->limit_vfs); + return -EINVAL; + } + err = pci_enable_sriov(pdev, num_vfs); if (err) { dev_warn(&pdev->dev, "Failed to enable PCI sriov: %d\n", err); @@ -333,6 +356,8 @@ static int nfp_pci_probe(struct pci_dev *pdev, if (err) goto err_cpp_free; + nfp_pcie_sriov_read_nfd_limit(pf); + err = nfp_net_pci_probe(pf); if (err) goto err_fw_unload; diff --git a/drivers/net/ethernet/netronome/nfp/nfp_main.h b/drivers/net/ethernet/netronome/nfp/nfp_main.h index 6c40fa322da3..39105d0435e9 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_main.h +++ b/drivers/net/ethernet/netronome/nfp/nfp_main.h @@ -59,6 +59,7 @@ struct nfp_eth_table; * @tx_area: Pointer to the CPP area for the TX queues * @rx_area: Pointer to the CPP area for the FL/RX queues * @irq_entries: Array of MSI-X entries for all ports + * @limit_vfs: Number of VFs supported by firmware (~0 for PCI limit) * @num_vfs: Number of SR-IOV VFs enabled * @fw_loaded: Is the firmware loaded? * @eth_tbl: NSP ETH table @@ -77,6 +78,7 @@ struct nfp_pf { struct msix_entry *irq_entries; + unsigned int limit_vfs; unsigned int num_vfs; bool fw_loaded; -- cgit v1.2.3