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SFV:NSPM; H:xir-pvapexch02.xlnx.xilinx.com; PTR:unknown-80-198.xilinx.com; CAT:NONE; SFS:(13230016)(4636009)(136003)(376002)(39860400002)(396003)(346002)(40470700004)(46966006)(36840700001)(70586007)(4326008)(8676002)(70206006)(82740400003)(30864003)(40460700003)(356005)(31696002)(44832011)(9786002)(5660300002)(8936002)(2906002)(7636003)(53546011)(41300700001)(82310400005)(26005)(45080400002)(478600001)(40480700001)(966005)(316002)(83380400001)(36860700001)(186003)(2616005)(6916009)(54906003)(336012)(47076005)(426003)(36756003)(31686004)(50156003)(43740500002); DIR:OUT; SFP:1101; X-OriginatorOrg: xilinx.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Aug 2022 15:03:49.2633 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a8d8c1d3-7e38-4649-0b8c-08da844f8502 X-MS-Exchange-CrossTenant-Id: 657af505-d5df-48d0-8300-c31994686c5c X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=657af505-d5df-48d0-8300-c31994686c5c; Ip=[149.199.80.198]; Helo=[xir-pvapexch02.xlnx.xilinx.com] X-MS-Exchange-CrossTenant-AuthSource: DM3NAM02FT010.eop-nam02.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CO1PR02MB8618 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org On 7/9/2022 12:49 AM, longli@linuxonhyperv.com wrote: > CAUTION: This message has originated from an External Source. Please use proper judgment and caution when opening attachments, clicking links, or responding to this email. > > > From: Long Li > > MANA is a PCI device. It uses IB verbs to access hardware through the > kernel RDMA layer. This patch introduces build environment and basic > device probe functions. > > Signed-off-by: Long Li > --- > Change log: > v2: > Fix typos. > Make the driver build only on x86-64 and Linux. > Remove unused header files. > Change port definition to uint16_t or uint8_t (for IB). > Use getline() in place of fgets() to read and truncate a line. > v3: > Add meson build check for required functions from RDMA direct verb header file > v4: > Remove extra "\n" in logging code. > Use "r" in place of "rb" in fopen() to read text files. > <...> > --- /dev/null > +++ b/doc/guides/nics/mana.rst > @@ -0,0 +1,66 @@ > +.. SPDX-License-Identifier: BSD-3-Clause > + Copyright 2022 Microsoft Corporation > + > +MANA poll mode driver library > +============================= > + > +The MANA poll mode driver library (**librte_net_mana**) implements support > +for Microsoft Azure Network Adapter VF in SR-IOV context. > + Can you please provide any link to an official product description? As a reference point for anybody interested more with the product details. <..> > + > +Netvsc PMD arguments > +-------------------- 'Netvsc'? Do you mean 'MANA'? j > + > +The user can specify below argument in devargs. > + > +#. ``mac``: > + > + Specify the MAC address for this device. If it is set, the driver > + probes and loads the NIC with a matching mac address. If it is not > + set, the driver probes on all the NICs on the PCI device. The default > + value is not set, meaning all the NICs will be probed and loaded. Code accepts up to 8 mac value, should this be documented? Also why this devarg is needed? > diff --git a/drivers/net/mana/mana.c b/drivers/net/mana/mana.c > new file mode 100644 > index 0000000000..cb59eb6882 > --- /dev/null > +++ b/drivers/net/mana/mana.c > @@ -0,0 +1,704 @@ > +/* SPDX-License-Identifier: BSD-3-Clause > + * Copyright 2022 Microsoft Corporation > + */ > + > +#include > +#include > +#include > +#include > + > +#include > +#include > +#include > +#include > + > +#include > +#include > + > +#include > + > +#include "mana.h" > + > +/* Shared memory between primary/secondary processes, per driver */ > +struct mana_shared_data *mana_shared_data; > +const struct rte_memzone *mana_shared_mz; If these global variables are not used by other compilation units, please try to make them static as much as possible. > +static const char *MZ_MANA_SHARED_DATA = "mana_shared_data"; > + > +struct mana_shared_data mana_local_data; > + Can you put some comment to this global variables? > +/* Spinlock for mana_shared_data */ > +static rte_spinlock_t mana_shared_data_lock = RTE_SPINLOCK_INITIALIZER; > + > +/* Allocate a buffer on the stack and fill it with a printf format string. */ > +#define MKSTR(name, ...) \ > + int mkstr_size_##name = snprintf(NULL, 0, "" __VA_ARGS__); \ > + char name[mkstr_size_##name + 1]; \ > + \ > + memset(name, 0, mkstr_size_##name + 1); \ > + snprintf(name, sizeof(name), "" __VA_ARGS__) > + > +int mana_logtype_driver; > +int mana_logtype_init; > + > +const struct eth_dev_ops mana_dev_ops = { > +}; > + > +const struct eth_dev_ops mana_dev_sec_ops = { > +}; It may be better to expand 'sec' to secondary to not confuse with security etc... > + > +uint16_t > +mana_rx_burst_removed(void *dpdk_rxq __rte_unused, > + struct rte_mbuf **pkts __rte_unused, > + uint16_t pkts_n __rte_unused) > +{ > + rte_mb(); > + return 0; > +} > + > +uint16_t > +mana_tx_burst_removed(void *dpdk_rxq __rte_unused, > + struct rte_mbuf **pkts __rte_unused, > + uint16_t pkts_n __rte_unused) > +{ > + rte_mb(); > + return 0; > +} > + > +static const char *mana_init_args[] = { > + "mac", > + NULL, > +}; > + > +/* Support of parsing up to 8 mac address from EAL command line */ > +#define MAX_NUM_ADDRESS 8 > +struct mana_conf { > + struct rte_ether_addr mac_array[MAX_NUM_ADDRESS]; > + unsigned int index; > +}; > + > +static int mana_arg_parse_callback(const char *key, const char *val, > + void *private) Since this is new driver, better to follow the coding convention: https://doc.dpdk.org/guides/contributing/coding_style.html Please put return type to another line: static int mana_arg_parse_callback(const char *key, const char *val, void *private) > +{ > + struct mana_conf *conf = (struct mana_conf *)private; > + int ret; > + > + DRV_LOG(INFO, "key=%s value=%s index=%d", key, val, conf->index); > + > + if (conf->index >= MAX_NUM_ADDRESS) { > + DRV_LOG(ERR, "Exceeding max MAC address"); > + return 1; > + } > + > + ret = rte_ether_unformat_addr(val, &conf->mac_array[conf->index]); > + if (ret) { > + DRV_LOG(ERR, "Invalid MAC address %s", val); > + return ret; > + } > + > + conf->index++; > + > + return 0; > +} > + <...> > +static int get_port_mac(struct ibv_device *device, unsigned int port, > + struct rte_ether_addr *addr) > +{ > + FILE *file; > + int ret = 0; > + DIR *dir; > + struct dirent *dent; > + unsigned int dev_port; > + char mac[20]; > + > + MKSTR(path, "%s/device/net", device->ibdev_path); > + > + dir = opendir(path); > + if (!dir) > + return -ENOENT; > + > + while ((dent = readdir(dir))) { > + char *name = dent->d_name; > + > + MKSTR(filepath, "%s/%s/dev_port", path, name); > + > + /* Ignore . and .. */ > + if ((name[0] == '.') && > + ((name[1] == '\0') || > + ((name[1] == '.') && (name[2] == '\0')))) > + continue; > + > + file = fopen(filepath, "r"); > + if (!file) > + continue; > + > + ret = fscanf(file, "%u", &dev_port); > + fclose(file); > + > + if (ret != 1) > + continue; > + > + /* Ethernet ports start at 0, IB port start at 1 */ > + if (dev_port == port - 1) { > + MKSTR(filepath, "%s/%s/address", path, name); 'MKSTR' macro adds two variables related with first argument, 'filepath' already used above. Yes there is a new scope but better to not define new variables, can you select a new name here? <...> > + > +static int mana_pci_probe_mac(struct rte_pci_driver *pci_drv __rte_unused, This is a static function, if you don't use 'pci_drv', why not drop it from the argument list. > + struct rte_pci_device *pci_dev, > + struct rte_ether_addr *mac_addr) > +{ > + struct ibv_device **ibv_list; > + int ibv_idx; > + struct ibv_context *ctx; > + struct ibv_device_attr_ex dev_attr; > + int num_devices; > + int ret = 0; > + uint8_t port; > + struct mana_priv *priv = NULL; > + struct rte_eth_dev *eth_dev = NULL; > + bool found_port; > + > + ibv_list = ibv_get_device_list(&num_devices); > + for (ibv_idx = 0; ibv_idx < num_devices; ibv_idx++) { > + struct ibv_device *ibdev = ibv_list[ibv_idx]; > + struct rte_pci_addr pci_addr; > + > + DRV_LOG(INFO, "Probe device name %s dev_name %s ibdev_path %s", > + ibdev->name, ibdev->dev_name, ibdev->ibdev_path); > + > + if (mana_ibv_device_to_pci_addr(ibdev, &pci_addr)) > + continue; > + > + /* Ignore if this IB device is not this PCI device */ > + if (pci_dev->addr.domain != pci_addr.domain || > + pci_dev->addr.bus != pci_addr.bus || > + pci_dev->addr.devid != pci_addr.devid || > + pci_dev->addr.function != pci_addr.function) > + continue; > + As far as I understand, intention of this loop is to find 'ibdev' matching this device, code gooes through all "ibv device list" for this, I wonder if there is a easy way for doing this, like a sysfs entry to help getting this information? And how mlx4/5 does this? > + ctx = ibv_open_device(ibdev); > + if (!ctx) { > + DRV_LOG(ERR, "Failed to open IB device %s", > + ibdev->name); > + continue; > + } > + > + ret = ibv_query_device_ex(ctx, NULL, &dev_attr); > + DRV_LOG(INFO, "dev_attr.orig_attr.phys_port_cnt %u", > + dev_attr.orig_attr.phys_port_cnt); > + found_port = false; > + > + for (port = 1; port <= dev_attr.orig_attr.phys_port_cnt; > + port++) { > + struct ibv_parent_domain_init_attr attr = {}; "= { 0 };" for portability. <...> > +static int mana_pci_probe(struct rte_pci_driver *pci_drv __rte_unused, > + struct rte_pci_device *pci_dev) > +{ > + struct rte_devargs *args = pci_dev->device.devargs; > + struct mana_conf conf = {}; afaik, this is not part of c spec yet, why not initialize as " = {0}". > + unsigned int i; > + int ret; > + > + if (args && args->args) { You can prefer 'args->drv_str', which is newer name of the args. <...> > +static const struct rte_pci_id mana_pci_id_map[] = { > + { > + RTE_PCI_DEVICE(PCI_VENDOR_ID_MICROSOFT, > + PCI_DEVICE_ID_MICROSOFT_MANA) > + }, PCI ID list should be terminated with ".vendor_id = 0", otherwise PCI bus scan loop may behave unexpectedly. > +}; > + > +static struct rte_pci_driver mana_pci_driver = { > + .driver = { > + .name = "mana_pci", driver names are mostly like 'net_', is there a reason to diverge from it? Also if you use 'RTE_PMD_REGISTER_PCI' macro, it will be standardised anyway. > + }, > + .id_table = mana_pci_id_map, > + .probe = mana_pci_probe, > + .remove = mana_pci_remove, > + .drv_flags = RTE_PCI_DRV_INTR_RMV, > +}; > + > +RTE_INIT(rte_mana_pmd_init) > +{ > + rte_pci_register(&mana_pci_driver); > +} > + Why not using 'RTE_PMD_REGISTER_PCI()' macro instead? > +RTE_PMD_EXPORT_NAME(net_mana, __COUNTER__); > +RTE_PMD_REGISTER_PCI_TABLE(net_mana, mana_pci_id_map); > +RTE_PMD_REGISTER_KMOD_DEP(net_mana, "* ib_uverbs & mana_ib"); > +RTE_LOG_REGISTER_SUFFIX(mana_logtype_init, init, NOTICE); > +RTE_LOG_REGISTER_SUFFIX(mana_logtype_driver, driver, NOTICE); > diff --git a/drivers/net/mana/mana.h b/drivers/net/mana/mana.h > new file mode 100644 > index 0000000000..e30c030b4e > --- /dev/null > +++ b/drivers/net/mana/mana.h > @@ -0,0 +1,210 @@ > +/* SPDX-License-Identifier: BSD-3-Clause > + * Copyright 2022 Microsoft Corporation > + */ > + > +#ifndef __MANA_H__ > +#define __MANA_H__ > + > +enum { > + PCI_VENDOR_ID_MICROSOFT = 0x1414, > +}; > + > +enum { > + PCI_DEVICE_ID_MICROSOFT_MANA = 0x00ba, > +}; > + > +/* Shared data between primary/secondary processes */ > +struct mana_shared_data { > + rte_spinlock_t lock; > + int init_done; > + unsigned int primary_cnt; > + unsigned int secondary_cnt; > +}; > + > +#define MIN_RX_BUF_SIZE 1024 > +#define MAX_FRAME_SIZE RTE_ETHER_MAX_LEN > +#define BNIC_MAX_MAC_ADDR 1 > + What 'BNIC_' prefix stands for? If it is related to the PMD, what do you think to use 'MANA_' as prefix? Same for multiple macros below. <...> > + > +#define PMD_INIT_FUNC_TRACE() PMD_INIT_LOG(DEBUG, " >>") > + > +const uint32_t *mana_supported_ptypes(struct rte_eth_dev *dev); > + This function is not defined in this patch, so can drop declarataion. <...> > diff --git a/drivers/net/mana/version.map b/drivers/net/mana/version.map > new file mode 100644 > index 0000000000..c2e0723b4c > --- /dev/null > +++ b/drivers/net/mana/version.map > @@ -0,0 +1,3 @@ > +DPDK_22 { It is 'DPDK_23' now.