From b419d9b1803882a15cf1448448720daaf568f21b Mon Sep 17 00:00:00 2001 From: Alejandro Lucero Date: Mon, 18 Jun 2018 21:06:12 +0100 Subject: [PATCH] net/nfp: use generic PCI config access functions This patch avoids direct access to device config sysfs file using rte_pci_read_config instead. Apart from replicating code, it turns out this direct access does not always work if non-root users execute DPDK apps. In those cases it is mandatory to go through VFIO specific function for reading pci config space. Signed-off-by: Alejandro Lucero (cherry picked from commit caab11ea33f02d9a0869890b48e371f928090279) --- drivers/net/nfp/nfp_net.c | 4 +- drivers/net/nfp/nfpcore/nfp_cpp.h | 6 +- drivers/net/nfp/nfpcore/nfp_cpp_pcie_ops.c | 111 +++++++-------------- drivers/net/nfp/nfpcore/nfp_cppcore.c | 9 +- 4 files changed, 47 insertions(+), 83 deletions(-) diff --git a/drivers/net/nfp/nfp_net.c b/drivers/net/nfp/nfp_net.c index 71249572d..62db54d8b 100644 --- a/drivers/net/nfp/nfp_net.c +++ b/drivers/net/nfp/nfp_net.c @@ -3154,9 +3154,9 @@ static int nfp_pf_pci_probe(struct rte_pci_driver *pci_drv __rte_unused, * use a lock file if UIO is being used. */ if (dev->kdrv == RTE_KDRV_VFIO) - cpp = nfp_cpp_from_device_name(dev->device.name, 0); + cpp = nfp_cpp_from_device_name(dev, 0); else - cpp = nfp_cpp_from_device_name(dev->device.name, 1); + cpp = nfp_cpp_from_device_name(dev, 1); if (!cpp) { RTE_LOG(ERR, PMD, "A CPP handle can not be obtained"); diff --git a/drivers/net/nfp/nfpcore/nfp_cpp.h b/drivers/net/nfp/nfpcore/nfp_cpp.h index de2ff84e9..1427954c1 100644 --- a/drivers/net/nfp/nfpcore/nfp_cpp.h +++ b/drivers/net/nfp/nfpcore/nfp_cpp.h @@ -6,6 +6,8 @@ #ifndef __NFP_CPP_H__ #define __NFP_CPP_H__ +#include + #include "nfp-common/nfp_platform.h" #include "nfp-common/nfp_resid.h" @@ -54,7 +56,7 @@ struct nfp_cpp_operations { size_t area_priv_size; /* Instance an NFP CPP */ - int (*init)(struct nfp_cpp *cpp, const char *devname); + int (*init)(struct nfp_cpp *cpp, struct rte_pci_device *dev); /* * Free the bus. @@ -181,7 +183,7 @@ uint32_t __nfp_cpp_model_autodetect(struct nfp_cpp *cpp); * * @return NFP CPP handle, or NULL on failure (and set errno accordingly). */ -struct nfp_cpp *nfp_cpp_from_device_name(const char *devname, +struct nfp_cpp *nfp_cpp_from_device_name(struct rte_pci_device *dev, int driver_lock_needed); /* diff --git a/drivers/net/nfp/nfpcore/nfp_cpp_pcie_ops.c b/drivers/net/nfp/nfpcore/nfp_cpp_pcie_ops.c index e46dbc7d7..7d132baa9 100644 --- a/drivers/net/nfp/nfpcore/nfp_cpp_pcie_ops.c +++ b/drivers/net/nfp/nfpcore/nfp_cpp_pcie_ops.c @@ -32,6 +32,7 @@ #include #include +#include #include "nfp_cpp.h" #include "nfp_target.h" #include "nfp6000/nfp6000.h" @@ -638,61 +639,32 @@ nfp_acquire_process_lock(struct nfp_pcie_user *desc) } static int -nfp6000_set_model(struct nfp_pcie_user *desc, struct nfp_cpp *cpp) +nfp6000_set_model(struct rte_pci_device *dev, struct nfp_cpp *cpp) { - char tmp_str[80]; - uint32_t tmp; - int fp; - - snprintf(tmp_str, sizeof(tmp_str), "%s/%s/config", PCI_DEVICES, - desc->busdev); - - fp = open(tmp_str, O_RDONLY); - if (!fp) - return -1; - - lseek(fp, 0x2e, SEEK_SET); + uint32_t model; - if (read(fp, &tmp, sizeof(tmp)) != sizeof(tmp)) { - printf("Error reading config file for model\n"); + if (rte_pci_read_config(dev, &model, 4, 0x2e) < 0) { + printf("nfp set model failed\n"); return -1; } - tmp = tmp << 16; - - if (close(fp) == -1) - return -1; - - nfp_cpp_model_set(cpp, tmp); + model = model << 16; + nfp_cpp_model_set(cpp, model); return 0; } static int -nfp6000_set_interface(struct nfp_pcie_user *desc, struct nfp_cpp *cpp) +nfp6000_set_interface(struct rte_pci_device *dev, struct nfp_cpp *cpp) { - char tmp_str[80]; - uint16_t tmp; - int fp; - - snprintf(tmp_str, sizeof(tmp_str), "%s/%s/config", PCI_DEVICES, - desc->busdev); + uint16_t interface; - fp = open(tmp_str, O_RDONLY); - if (!fp) - return -1; - - lseek(fp, 0x154, SEEK_SET); - - if (read(fp, &tmp, sizeof(tmp)) != sizeof(tmp)) { - printf("error reading config file for interface\n"); + if (rte_pci_read_config(dev, &interface, 2, 0x154) < 0) { + printf("nfp set interface failed\n"); return -1; } - if (close(fp) == -1) - return -1; - - nfp_cpp_interface_set(cpp, tmp); + nfp_cpp_interface_set(cpp, interface); return 0; } @@ -703,7 +675,7 @@ nfp6000_set_interface(struct nfp_pcie_user *desc, struct nfp_cpp *cpp) #define PCI_EXT_CAP_NEXT(header) ((header >> 20) & 0xffc) #define PCI_EXT_CAP_ID_DSN 0x03 static int -nfp_pci_find_next_ext_capability(int fp, int cap) +nfp_pci_find_next_ext_capability(struct rte_pci_device *dev, int cap) { uint32_t header; int ttl; @@ -712,9 +684,8 @@ nfp_pci_find_next_ext_capability(int fp, int cap) /* minimum 8 bytes per capability */ ttl = (PCI_CFG_SPACE_EXP_SIZE - PCI_CFG_SPACE_SIZE) / 8; - lseek(fp, pos, SEEK_SET); - if (read(fp, &header, sizeof(header)) != sizeof(header)) { - printf("error reading config file for serial\n"); + if (rte_pci_read_config(dev, &header, 4, pos) < 0) { + printf("nfp error reading extended capabilities\n"); return -1; } @@ -733,9 +704,8 @@ nfp_pci_find_next_ext_capability(int fp, int cap) if (pos < PCI_CFG_SPACE_SIZE) break; - lseek(fp, pos, SEEK_SET); - if (read(fp, &header, sizeof(header)) != sizeof(header)) { - printf("error reading config file for serial\n"); + if (rte_pci_read_config(dev, &header, 4, pos) < 0) { + printf("nfp error reading extended capabilities\n"); return -1; } } @@ -744,56 +714,47 @@ nfp_pci_find_next_ext_capability(int fp, int cap) } static int -nfp6000_set_serial(struct nfp_pcie_user *desc, struct nfp_cpp *cpp) +nfp6000_set_serial(struct rte_pci_device *dev, struct nfp_cpp *cpp) { - char tmp_str[80]; uint16_t tmp; uint8_t serial[6]; int serial_len = 6; - int fp, pos; + int pos; - snprintf(tmp_str, sizeof(tmp_str), "%s/%s/config", PCI_DEVICES, - desc->busdev); - - fp = open(tmp_str, O_RDONLY); - if (!fp) - return -1; - - pos = nfp_pci_find_next_ext_capability(fp, PCI_EXT_CAP_ID_DSN); + pos = nfp_pci_find_next_ext_capability(dev, PCI_EXT_CAP_ID_DSN); if (pos <= 0) { - printf("PCI_EXT_CAP_ID_DSN not found. Using default offset\n"); - lseek(fp, 0x156, SEEK_SET); + printf("PCI_EXT_CAP_ID_DSN not found. nfp set serial failed\n"); + return -1; } else { - lseek(fp, pos + 6, SEEK_SET); + pos += 6; } - if (read(fp, &tmp, sizeof(tmp)) != sizeof(tmp)) { - printf("error reading config file for serial\n"); + if (rte_pci_read_config(dev, &tmp, 2, pos) < 0) { + printf("nfp set serial failed\n"); return -1; } serial[4] = (uint8_t)((tmp >> 8) & 0xff); serial[5] = (uint8_t)(tmp & 0xff); - if (read(fp, &tmp, sizeof(tmp)) != sizeof(tmp)) { - printf("error reading config file for serial\n"); + pos += 2; + if (rte_pci_read_config(dev, &tmp, 2, pos) < 0) { + printf("nfp set serial failed\n"); return -1; } serial[2] = (uint8_t)((tmp >> 8) & 0xff); serial[3] = (uint8_t)(tmp & 0xff); - if (read(fp, &tmp, sizeof(tmp)) != sizeof(tmp)) { - printf("error reading config file for serial\n"); + pos += 2; + if (rte_pci_read_config(dev, &tmp, 2, pos) < 0) { + printf("nfp set serial failed\n"); return -1; } serial[0] = (uint8_t)((tmp >> 8) & 0xff); serial[1] = (uint8_t)(tmp & 0xff); - if (close(fp) == -1) - return -1; - nfp_cpp_serial_set(cpp, serial, serial_len); return 0; @@ -831,7 +792,7 @@ nfp6000_set_barsz(struct nfp_pcie_user *desc) } static int -nfp6000_init(struct nfp_cpp *cpp, const char *devname) +nfp6000_init(struct nfp_cpp *cpp, struct rte_pci_device *dev) { char link[120]; char tmp_str[80]; @@ -846,7 +807,7 @@ nfp6000_init(struct nfp_cpp *cpp, const char *devname) memset(desc->busdev, 0, BUSDEV_SZ); - strncpy(desc->busdev, devname, strlen(devname)); + strncpy(desc->busdev, dev->device.name, sizeof(desc->busdev)); if (cpp->driver_lock_needed) { ret = nfp_acquire_process_lock(desc); @@ -872,11 +833,11 @@ nfp6000_init(struct nfp_cpp *cpp, const char *devname) if (desc->device == -1) return -1; - if (nfp6000_set_model(desc, cpp) < 0) + if (nfp6000_set_model(dev, cpp) < 0) return -1; - if (nfp6000_set_interface(desc, cpp) < 0) + if (nfp6000_set_interface(dev, cpp) < 0) return -1; - if (nfp6000_set_serial(desc, cpp) < 0) + if (nfp6000_set_serial(dev, cpp) < 0) return -1; if (nfp6000_set_barsz(desc) < 0) return -1; diff --git a/drivers/net/nfp/nfpcore/nfp_cppcore.c b/drivers/net/nfp/nfpcore/nfp_cppcore.c index f61143f7e..75d3c9748 100644 --- a/drivers/net/nfp/nfpcore/nfp_cppcore.c +++ b/drivers/net/nfp/nfpcore/nfp_cppcore.c @@ -12,6 +12,7 @@ #include #include +#include #include "nfp_cpp.h" #include "nfp_target.h" @@ -542,7 +543,7 @@ nfp_xpb_readl(struct nfp_cpp *cpp, uint32_t xpb_addr, uint32_t *value) } static struct nfp_cpp * -nfp_cpp_alloc(const char *devname, int driver_lock_needed) +nfp_cpp_alloc(struct rte_pci_device *dev, int driver_lock_needed) { const struct nfp_cpp_operations *ops; struct nfp_cpp *cpp; @@ -561,7 +562,7 @@ nfp_cpp_alloc(const char *devname, int driver_lock_needed) cpp->driver_lock_needed = driver_lock_needed; if (cpp->op->init) { - err = cpp->op->init(cpp, devname); + err = cpp->op->init(cpp, dev); if (err < 0) { free(cpp); return NULL; @@ -604,9 +605,9 @@ nfp_cpp_free(struct nfp_cpp *cpp) } struct nfp_cpp * -nfp_cpp_from_device_name(const char *devname, int driver_lock_needed) +nfp_cpp_from_device_name(struct rte_pci_device *dev, int driver_lock_needed) { - return nfp_cpp_alloc(devname, driver_lock_needed); + return nfp_cpp_alloc(dev, driver_lock_needed); } /* -- 2.17.1