On Mon, May 11, 2015 at 10:31:04AM -0700, Stephen Hemminger wrote: > On Mon, 11 May 2015 12:54:54 +0000 > Neil Horman <nhorman at tuxdriver.com> wrote: > > > On Thu, May 07, 2015 at 04:25:32PM -0700, Stephen Hemminger wrote: > > > From: Stephen Hemminger <shemming at brocade.com> > > > > > > Some drivers need ability to access PCI config (for example for power > > > management). This adds an abstraction to do this; only implemented > > > on Linux, but should be possible on BSD. > > > > > Could someone who has BSD infrastructure try this, not sure if it will even > build.
No, it doesn't. :-) Version that compiles is below. However, I haven't tried testing it yet or anything. Is there any easy way for me to do so? /Bruce diff --git a/lib/librte_eal/bsdapp/eal/eal_pci.c b/lib/librte_eal/bsdapp/eal/eal_pci.c index 61e8921..4194199 100644 --- a/lib/librte_eal/bsdapp/eal/eal_pci.c +++ b/lib/librte_eal/bsdapp/eal/eal_pci.c @@ -490,6 +490,87 @@ rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *d return 1; } +/* Read PCI config space. */ +int rte_eal_pci_read_config(const struct rte_pci_device *dev, + void *buf, size_t len, off_t offset) +{ + int fd = -1; + + struct pci_io pi = { + .pi_sel = { + .pc_domain = dev->addr.domain, + .pc_bus = dev->addr.bus, + .pc_dev = dev->addr.devid, + .pc_func = dev->addr.function, + }, + .pi_reg = offset, + .pi_width = len, + }; + + if (len == 3 || len > sizeof(pi.pi_data)) { + RTE_LOG(ERR, EAL, "%s(): invalid pci read length\n", __func__); + goto error; + } + + fd = open("/dev/pci", O_RDONLY); + if (fd < 0) { + RTE_LOG(ERR, EAL, "%s(): error opening /dev/pci\n", __func__); + goto error; + } + + if (ioctl(fd, PCIOCREAD, &pi) < 0) + goto error; + close(fd); + + memcpy(buf, &pi.pi_data, len); + return 0; + +error: + if (fd >= 0) + close(fd); + return -1; +} + +/* Write PCI config space. */ +int rte_eal_pci_write_config(const struct rte_pci_device *dev, + const void *buf, size_t len, off_t offset) +{ + int fd = -1; + + struct pci_io pi = { + .pi_sel = { + .pc_domain = dev->addr.domain, + .pc_bus = dev->addr.bus, + .pc_dev = dev->addr.devid, + .pc_func = dev->addr.function, + }, + .pi_reg = offset, + .pi_data = *(u_int32_t *)buf, + .pi_width = len, + }; + + if (len == 3 || len > sizeof(pi.pi_data)) { + RTE_LOG(ERR, EAL, "%s(): invalid pci read length\n", __func__); + goto error; + } + + fd = open("/dev/pci", O_RDONLY); + if (fd < 0) { + RTE_LOG(ERR, EAL, "%s(): error opening /dev/pci\n", __func__); + goto error; + } + + if (ioctl(fd, PCIOCWRITE, &pi) < 0) + goto error; + close(fd); + return 0; + +error: + if (fd >= 0) + close(fd); + return -1; +} + /* Init the PCI EAL subsystem */ int rte_eal_pci_init(void)