From 68f77593823cabf9513482f1f363c93bf6b3a077 Mon Sep 17 00:00:00 2001 From: Helin Zhang Date: Mon, 22 Feb 2016 11:59:44 +0800 Subject: [PATCH] pci: remove config of extended tag Remove pci configuration of 'extended tag' and 'max read request size', as they are not required by all devices and it lets PMD to configure them if necessary. In addition, 'pci_config_space_set()' is deprecated. Signed-off-by: Helin Zhang Acked-by: Jingjing Wu Signed-off-by: Thomas Monjalon --- config/common_base | 1 + doc/guides/rel_notes/deprecation.rst | 5 ++ lib/librte_eal/common/eal_common_pci.c | 7 -- lib/librte_eal/common/include/rte_pci.h | 5 +- lib/librte_eal/linuxapp/eal/eal_pci.c | 90 ++----------------------- 5 files changed, 16 insertions(+), 92 deletions(-) diff --git a/config/common_base b/config/common_base index 1af28c88b8..c73f71a6e7 100644 --- a/config/common_base +++ b/config/common_base @@ -102,6 +102,7 @@ CONFIG_RTE_EAL_PMD_PATH="" # # Special configurations in PCI Config Space for high performance +# They are all deprecated, and will be removed later. # CONFIG_RTE_PCI_CONFIG=n CONFIG_RTE_PCI_EXTENDED_TAG="" diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst index 9930b5a02b..9979982d35 100644 --- a/doc/guides/rel_notes/deprecation.rst +++ b/doc/guides/rel_notes/deprecation.rst @@ -8,6 +8,11 @@ API and ABI deprecation notices are to be posted here. Deprecation Notices ------------------- +* The EAL function pci_config_space_set is deprecated in release 16.04 + and will be removed from 16.07. + Macros CONFIG_RTE_PCI_CONFIG, CONFIG_RTE_PCI_EXTENDED_TAG and + CONFIG_RTE_PCI_MAX_READ_REQUEST_SIZE will be removed. + * The following fields have been deprecated in rte_eth_stats: ibadcrc, ibadlen, imcasts, fdirmatch, fdirmiss, tx_pause_xon, rx_pause_xon, tx_pause_xoff, rx_pause_xoff diff --git a/lib/librte_eal/common/eal_common_pci.c b/lib/librte_eal/common/eal_common_pci.c index 96d51133f0..366fb46e5d 100644 --- a/lib/librte_eal/common/eal_common_pci.c +++ b/lib/librte_eal/common/eal_common_pci.c @@ -180,13 +180,6 @@ rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *d } if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) { -#ifdef RTE_PCI_CONFIG - /* - * Set PCIe config space for high performance. - * Return value can be ignored. - */ - pci_config_space_set(dev); -#endif /* map resources for devices that use igb_uio */ ret = rte_eal_pci_map_device(dev); if (ret != 0) diff --git a/lib/librte_eal/common/include/rte_pci.h b/lib/librte_eal/common/include/rte_pci.h index 067e084e4f..e692094e41 100644 --- a/lib/librte_eal/common/include/rte_pci.h +++ b/lib/librte_eal/common/include/rte_pci.h @@ -578,14 +578,17 @@ void rte_eal_pci_ioport_write(struct rte_pci_ioport *p, const void *data, size_t len, off_t offset); #ifdef RTE_PCI_CONFIG +#include /** * Set special config space registers for performance purpose. + * It is deprecated, as all configurations have been moved into + * each PMDs respectively. * * @param dev * A pointer to a rte_pci_device structure describing the device * to use */ -void pci_config_space_set(struct rte_pci_device *dev); +void pci_config_space_set(struct rte_pci_device *dev) __rte_deprecated; #endif /* RTE_PCI_CONFIG */ #ifdef __cplusplus diff --git a/lib/librte_eal/linuxapp/eal/eal_pci.c b/lib/librte_eal/linuxapp/eal/eal_pci.c index 434697323c..4c45452067 100644 --- a/lib/librte_eal/linuxapp/eal/eal_pci.c +++ b/lib/librte_eal/linuxapp/eal/eal_pci.c @@ -482,92 +482,14 @@ error: } #ifdef RTE_PCI_CONFIG -static int -pci_config_extended_tag(struct rte_pci_device *dev) -{ - struct rte_pci_addr *loc = &dev->addr; - char filename[PATH_MAX]; - char buf[BUFSIZ]; - FILE *f; - - /* not configured, let it as is */ - if (strncmp(RTE_PCI_EXTENDED_TAG, "on", 2) != 0 && - strncmp(RTE_PCI_EXTENDED_TAG, "off", 3) != 0) - return 0; - - snprintf(filename, sizeof(filename), - SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/" "extended_tag", - loc->domain, loc->bus, loc->devid, loc->function); - f = fopen(filename, "rw+"); - if (!f) - return -1; - - fgets(buf, sizeof(buf), f); - if (strncmp(RTE_PCI_EXTENDED_TAG, "on", 2) == 0) { - /* enable Extended Tag*/ - if (strncmp(buf, "on", 2) != 0) { - fseek(f, 0, SEEK_SET); - fputs("on", f); - } - } else { - /* disable Extended Tag */ - if (strncmp(buf, "off", 3) != 0) { - fseek(f, 0, SEEK_SET); - fputs("off", f); - } - } - fclose(f); - - return 0; -} - -static int -pci_config_max_read_request_size(struct rte_pci_device *dev) -{ - struct rte_pci_addr *loc = &dev->addr; - char filename[PATH_MAX]; - char buf[BUFSIZ], param[BUFSIZ]; - FILE *f; - /* size can be 128, 256, 512, 1024, 2048, 4096 */ - uint32_t max_size = RTE_PCI_MAX_READ_REQUEST_SIZE; - - /* not configured, let it as is */ - if (!max_size) - return 0; - - snprintf(filename, sizeof(filename), - SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/" "max_read_request_size", - loc->domain, loc->bus, loc->devid, loc->function); - f = fopen(filename, "rw+"); - if (!f) - return -1; - - fgets(buf, sizeof(buf), f); - snprintf(param, sizeof(param), "%d", max_size); - - /* check if the size to be set is the same as current */ - if (strcmp(buf, param) == 0) { - fclose(f); - return 0; - } - fseek(f, 0, SEEK_SET); - fputs(param, f); - fclose(f); - - return 0; -} - +/* + * It is deprecated, all its configurations have been moved into + * each PMD respectively. + */ void -pci_config_space_set(struct rte_pci_device *dev) +pci_config_space_set(__rte_unused struct rte_pci_device *dev) { - if (rte_eal_process_type() != RTE_PROC_PRIMARY) - return; - - /* configure extended tag */ - pci_config_extended_tag(dev); - - /* configure max read request size */ - pci_config_max_read_request_size(dev); + RTE_LOG(DEBUG, EAL, "Nothing here, as it is deprecated\n"); } #endif -- 2.20.1