diff options
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/Makefile | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfp_main.c | 332 | ||||
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfp_main.h | 49 | ||||
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfp_net.h | 26 | ||||
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfp_net_main.c | 585 |
5 files changed, 970 insertions, 23 deletions
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 <linux/firmware.h> #include <linux/vermagic.h> +#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 <oss-drivers@netronome.com>"); 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 <linux/list.h> #include <linux/types.h> #include <linux/msi.h> #include <linux/pci.h> +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 <linux/interrupt.h> +#include <linux/list.h> #include <linux/netdevice.h> #include <linux/pci.h> #include <linux/io-64-nonatomic-hi-lo.h> @@ -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 <jakub.kicinski@netronome.com> + * Alejandro Lucero <alejandro.lucero@netronome.com> + * Jason McMullan <jason.mcmullan@netronome.com> + * Rolf Neugebauer <rolf.neugebauer@netronome.com> + */ + +#include <linux/etherdevice.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <linux/pci_regs.h> +#include <linux/msi.h> +#include <linux/random.h> + +#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); +} |