> +static int ocrdma_inet6addr_event(struct notifier_block *,
> + unsigned long, void *);
> +
> +static struct notifier_block ocrdma_inet6addr_notifier = {
> + .notifier_call = ocrdma_inet6addr_event
> +};
> +
> +int ocrdma_get_instance(void)
> +{
> + int instance = 0;
> +
> + /* Assign an unused number */
> + if (!idr_pre_get(&ocrdma_dev_id, GFP_KERNEL))
> + return -1;
> + if (idr_get_new(&ocrdma_dev_id, NULL, &instance))
> + return -1;
> + return instance;
> +}
> +
> +void ocrdma_get_guid(struct ocrdma_dev *dev, u8 *guid)
> +{
> + u8 mac_addr[6];
> +
> + memcpy(&mac_addr[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
> + guid[0] = mac_addr[0] ^ 2;
> + guid[1] = mac_addr[1];
> + guid[2] = mac_addr[2];
> + guid[3] = 0xff;
> + guid[4] = 0xfe;
> + guid[5] = mac_addr[3];
> + guid[6] = mac_addr[4];
> + guid[7] = mac_addr[5];
> +}
> +
> +static void ocrdma_build_sgid_mac(union ib_gid *sgid, unsigned char
> *mac_addr,
> + bool is_vlan, u16 vlan_id)
> +{
> + sgid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL);
> + sgid->raw[8] = mac_addr[0] ^ 2;
> + sgid->raw[9] = mac_addr[1];
> + sgid->raw[10] = mac_addr[2];
> + if (is_vlan) {
> + sgid->raw[11] = vlan_id >> 8;
> + sgid->raw[12] = vlan_id & 0xff;
> + } else {
> + sgid->raw[11] = 0xff;
> + sgid->raw[12] = 0xfe;
> + }
> + sgid->raw[13] = mac_addr[3];
> + sgid->raw[14] = mac_addr[4];
> + sgid->raw[15] = mac_addr[5];
> +}
> +
> +static void ocrdma_add_sgid(struct ocrdma_dev *dev, unsigned char *mac_addr,
> + bool is_vlan, u16 vlan_id)
> +{
> + int i;
> + bool found = false;
> + union ib_gid new_sgid;
> + int free_idx = OCRDMA_MAX_SGID;
> + unsigned long flags;
> +
> + memset(&ocrdma_zero_sgid, 0, sizeof(union ib_gid));
ocrdma_zero_sgid should already be zeroed
Actually, can't we either use in6addr_any instead? I see that the mlx4 driver
also has a zero gid. So, if we don't want to overload the use of in6addr_any,
we can define gid_zero in ib_core.
> +
> + ocrdma_build_sgid_mac(&new_sgid, mac_addr, is_vlan, vlan_id);
> +
> + spin_lock_irqsave(&dev->sgid_lock, flags);
> + for (i = 0; i < OCRDMA_MAX_SGID; i++) {
> + if (!memcmp(&dev->sgid_tbl[i], &ocrdma_zero_sgid,
> + sizeof(union ib_gid))) {
> + /* found free entry */
> + if (!found) {
> + free_idx = i;
> + found = true;
> + break;
> + }
> + } else if (!memcmp(&dev->sgid_tbl[i], &new_sgid,
> + sizeof(union ib_gid))) {
> + /* entry already present, no addition is required. */
> + spin_unlock_irqrestore(&dev->sgid_lock, flags);
> + return;
> + }
> + }
> + /* if entry doesn't exist and if table has some space, add entry */
> + if (found)
> + memcpy(&dev->sgid_tbl[free_idx], &new_sgid,
> + sizeof(union ib_gid));
can move memcpy into for loop and remove found flag
> + spin_unlock_irqrestore(&dev->sgid_lock, flags);
> +}
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