/** * bnx2i_show_ccell_info - returns command cell (HQ) size * @dev: device pointer * @buf: buffer to return current SQ size parameter * * returns per-connection TCP history queue size parameter */ static ssize_t bnx2i_show_ccell_info(struct class_device *dev, char *buf) { struct bnx2i_hba *hba = bnx2i_dev_to_hba(dev); return sprintf(buf, "0x%x\n", hba->num_ccell); }
/** * bnx2i_set_sq_info - update send queue (SQ) size parameter * @dev: device pointer * @buf: buffer to return current SQ size parameter * @count: parameter buffer size * * Interface for user to change shared queue size allocated for each conn * Must be within SQ limits and a power of 2. For the latter this is needed * because of how libiscsi preallocates tasks. */ static ssize_t bnx2i_set_sq_info(struct class_device *dev, const char *buf, size_t count) { struct bnx2i_hba *hba = bnx2i_dev_to_hba(dev); u32 val; int max_sq_size; if (hba->ofld_conns_active) goto skip_config; if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) max_sq_size = BNX2I_5770X_SQ_WQES_MAX; else max_sq_size = BNX2I_570X_SQ_WQES_MAX; if (sscanf(buf, " 0x%x ", &val) > 0) { if ((val >= BNX2I_SQ_WQES_MIN) && (val <= max_sq_size) && (is_power_of_2(val))) hba->max_sqes = val; } return count; skip_config: printk(KERN_ERR "bnx2i: device busy, cannot change SQ size\n"); return 0; }
/** * bnx2i_show_sq_info - return(s currently configured send queue (SQ) size * @dev: device pointer * @buf: buffer to return current SQ size parameter * * Returns current SQ size parameter, this paramater determines the number * outstanding iSCSI commands supported on a connection */ static ssize_t bnx2i_show_sq_info(struct device *dev, struct device_attribute *attr, char *buf) { struct bnx2i_hba *hba = bnx2i_dev_to_hba(dev); return sprintf(buf, "0x%x\n", hba->max_sqes); }
/** * bnx2i_get_link_state - set command cell (HQ) size * @dev: device pointer * @buf: buffer to return current SQ size parameter * @count: parameter buffer size * * updates per-connection TCP history queue size parameter */ static ssize_t bnx2i_set_ccell_info(struct class_device *dev, const char *buf, size_t count) { u32 val; struct bnx2i_hba *hba = bnx2i_dev_to_hba(dev); if (hba->ofld_conns_active) goto skip_config; if (sscanf(buf, " 0x%x ", &val) > 0) { if ((val >= BNX2I_CCELLS_MIN) && (val <= BNX2I_CCELLS_MAX)) { hba->num_ccell = val; } } return count; skip_config: printk(KERN_ERR "bnx2i: device busy, cannot change CCELL size\n"); return 0; }