On 2014/12/9 14:32, Tetsuya Mukawa wrote:
> This patch replaces pci_addr_comparison() and memcmp() of pci addresses by
> eal_compare_pci_addr().
>
> Signed-off-by: Tetsuya Mukawa <mukawa at igel.co.jp>
> ---
> lib/librte_eal/bsdapp/eal/eal_pci.c | 16 +---------------
> lib/librte_eal/common/eal_common_pci.c | 2 +-
> lib/librte_eal/common/include/rte_pci.h | 29 +++++++++++++++++++++++++++++
> lib/librte_eal/linuxapp/eal/eal_pci.c | 16 +---------------
> lib/librte_eal/linuxapp/eal/eal_pci_uio.c | 2 +-
> 5 files changed, 33 insertions(+), 32 deletions(-)
>
> diff --git a/lib/librte_eal/bsdapp/eal/eal_pci.c
> b/lib/librte_eal/bsdapp/eal/eal_pci.c
> index 74ecce7..7eda513 100644
> --- a/lib/librte_eal/bsdapp/eal/eal_pci.c
> +++ b/lib/librte_eal/bsdapp/eal/eal_pci.c
> @@ -270,20 +270,6 @@ pci_uio_map_resource(struct rte_pci_device *dev)
> return (0);
> }
>
> -/* Compare two PCI device addresses. */
> -static int
> -pci_addr_comparison(struct rte_pci_addr *addr, struct rte_pci_addr *addr2)
> -{
> - uint64_t dev_addr = (addr->domain << 24) + (addr->bus << 16) +
> (addr->devid << 8) + addr->function;
> - uint64_t dev_addr2 = (addr2->domain << 24) + (addr2->bus << 16) +
> (addr2->devid << 8) + addr2->function;
> -
> - if (dev_addr > dev_addr2)
> - return 1;
> - else
> - return 0;
> -}
> -
> -
> /* Scan one pci sysfs entry, and fill the devices list from it. */
> static int
> pci_scan_one(int dev_pci_fd, struct pci_conf *conf)
> @@ -358,7 +344,7 @@ pci_scan_one(int dev_pci_fd, struct pci_conf *conf)
> struct rte_pci_device *dev2 = NULL;
>
> TAILQ_FOREACH(dev2, &pci_device_list, next) {
> - if (pci_addr_comparison(&dev->addr, &dev2->addr))
> + if (eal_compare_pci_addr(&dev->addr, &dev2->addr))
> continue;
> else {
> TAILQ_INSERT_BEFORE(dev2, dev, next);
> diff --git a/lib/librte_eal/common/eal_common_pci.c
> b/lib/librte_eal/common/eal_common_pci.c
> index f3c7f71..f01f258 100644
> --- a/lib/librte_eal/common/eal_common_pci.c
> +++ b/lib/librte_eal/common/eal_common_pci.c
> @@ -93,7 +93,7 @@ static struct rte_devargs *pci_devargs_lookup(struct
> rte_pci_device *dev)
> if (devargs->type != RTE_DEVTYPE_BLACKLISTED_PCI &&
> devargs->type != RTE_DEVTYPE_WHITELISTED_PCI)
> continue;
> - if (!memcmp(&dev->addr, &devargs->pci.addr, sizeof(dev->addr)))
> + if (eal_compare_pci_addr(&dev->addr, &devargs->pci.addr))
> return devargs;
> }
> return NULL;
> diff --git a/lib/librte_eal/common/include/rte_pci.h
> b/lib/librte_eal/common/include/rte_pci.h
> index b819539..fe374a8 100644
> --- a/lib/librte_eal/common/include/rte_pci.h
> +++ b/lib/librte_eal/common/include/rte_pci.h
> @@ -261,6 +261,35 @@ eal_parse_pci_DomBDF(const char *input, struct
> rte_pci_addr *dev_addr)
> }
> #undef GET_PCIADDR_FIELD
>
> +/* Compare two PCI device addresses. */
> +/**
> + * Utility function to compare two PCI device addresses.
> + *
> + * @param addr
> + * The PCI Bus-Device-Function address to compare
> + * @param addr2
> + * The PCI Bus-Device-Function address to compare
> + * @return
> + * 0 on equal PCI address.
> + * Positive on addr is greater than addr2.
> + * Negative on addr is less than addr2.
> + */
> +static inline int
> +eal_compare_pci_addr(struct rte_pci_addr *addr, struct rte_pci_addr *addr2)
> +{
> + uint64_t dev_addr = (addr->domain << 24) + (addr->bus << 16) +
> + (addr->devid << 8) + addr->function;
> + uint64_t dev_addr2 = (addr2->domain << 24) + (addr2->bus << 16) +
> + (addr2->devid << 8) + addr2->function;
> +
Here I prefer:
uint64_t dev_addr = (addr->domain << 24) | (addr->bus << 16) | (addr->devid <<
8) | addr->function;
Thanks,
Michael
> + if (dev_addr > dev_addr2)
> + return 1;
> + else if (dev_addr < dev_addr2)
> + return -1;
> + else
> + return 0;
> +}
> +
> /**
> * Probe the PCI bus for registered drivers.
> *
> diff --git a/lib/librte_eal/linuxapp/eal/eal_pci.c
> b/lib/librte_eal/linuxapp/eal/eal_pci.c
> index b5f5410..23a69e9 100644
> --- a/lib/librte_eal/linuxapp/eal/eal_pci.c
> +++ b/lib/librte_eal/linuxapp/eal/eal_pci.c
> @@ -200,20 +200,6 @@ error:
> return -1;
> }
>
> -/* Compare two PCI device addresses. */
> -static int
> -pci_addr_comparison(struct rte_pci_addr *addr, struct rte_pci_addr *addr2)
> -{
> - uint64_t dev_addr = (addr->domain << 24) + (addr->bus << 16) +
> (addr->devid << 8) + addr->function;
> - uint64_t dev_addr2 = (addr2->domain << 24) + (addr2->bus << 16) +
> (addr2->devid << 8) + addr2->function;
> -
> - if (dev_addr > dev_addr2)
> - return 1;
> - else
> - return 0;
> -}
> -
> -
> /* Scan one pci sysfs entry, and fill the devices list from it. */
> static int
> pci_scan_one(const char *dirname, uint16_t domain, uint8_t bus,
> @@ -306,7 +292,7 @@ pci_scan_one(const char *dirname, uint16_t domain,
> uint8_t bus,
> struct rte_pci_device *dev2 = NULL;
>
> TAILQ_FOREACH(dev2, &pci_device_list, next) {
> - if (pci_addr_comparison(&dev->addr, &dev2->addr))
> + if (eal_compare_pci_addr(&dev->addr, &dev2->addr) != 0)
> continue;
> else {
> TAILQ_INSERT_BEFORE(dev2, dev, next);
> diff --git a/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
> b/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
> index e53f06b..1da3507 100644
> --- a/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
> +++ b/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
> @@ -123,7 +123,7 @@ pci_uio_map_secondary(struct rte_pci_device *dev)
> TAILQ_FOREACH(uio_res, pci_res_list, next) {
>
> /* skip this element if it doesn't match our PCI address */
> - if (memcmp(&uio_res->pci_addr, &dev->addr, sizeof(dev->addr)))
> + if (eal_compare_pci_addr(&uio_res->pci_addr, &dev->addr))
> continue;
>
> for (i = 0; i != uio_res->nb_maps; i++) {
