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.
diff --git a/lib/librte_eal/bsdapp/eal/eal_pci.c
b/lib/librte_eal/bsdapp/eal/eal_pci.c
index 61e8921..8ba5b13 100644
--- a/lib/librte_eal/bsdapp/eal/eal_pci.c
+++ b/lib/librte_eal/bsdapp/eal/eal_pci.c
@@ -490,6 +490,76 @@ 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;
+
+ fd = open("/dev/pci", O_RDONLY);
+ if (fd < 0) {
+ RTE_LOG(ERR, EAL, "%s(): error opening /dev/pci\n", __func__);
+ goto error;
+ }
+
+ struct pci_io pi = {
+ .pi_sel = {
+ .pc_domain = dev->addr.domain,
+ .bus = dev->addr.bus,
+ .pc_dev = dev->addr.devid,
+ .pc_func = dev->addr.function,
+ },
+ .pi_reg = offset,
+ .pi_data = buf,
+ .pi_width = len,
+ };
+
+ if (ioctl(fd, PCIIOCREAD, &pi) < 0)
+ goto error;
+ close(fd);
+ 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 *device,
+ const void *buf, size_t len, off_t offset)
+{
+ int fd = -1;
+
+ fd = open("/dev/pci", O_RDONLY);
+ if (fd < 0) {
+ RTE_LOG(ERR, EAL, "%s(): error opening /dev/pci\n", __func__);
+ goto error;
+ }
+
+ struct pci_io pi = {
+ .pi_sel = {
+ .pc_domain = dev->addr.domain,
+ .bus = dev->addr.bus,
+ .pc_dev = dev->addr.devid,
+ .pc_func = dev->addr.function,
+ },
+ .pi_reg = offset,
+ .pi_data = buf,
+ .pi_width = len,
+ };
+
+ if (ioctl(fd, PCIIOCWRITE, &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)
