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149 lines
3.8 KiB
149 lines
3.8 KiB
/* bnx2i_sysfs.c: QLogic NetXtreme II iSCSI driver. |
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* |
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* Copyright (c) 2004 - 2013 Broadcom Corporation |
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* Copyright (c) 2014, QLogic Corporation |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation. |
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* |
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* Written by: Anil Veerabhadrappa ([email protected]) |
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* Previously Maintained by: Eddie Wai ([email protected]) |
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* Maintained by: [email protected] |
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*/ |
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#include "bnx2i.h" |
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/** |
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* bnx2i_dev_to_hba - maps dev pointer to adapter struct |
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* @dev: device pointer |
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* |
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* Map device to hba structure |
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*/ |
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static inline struct bnx2i_hba *bnx2i_dev_to_hba(struct device *dev) |
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{ |
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struct Scsi_Host *shost = class_to_shost(dev); |
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return iscsi_host_priv(shost); |
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} |
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/** |
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* bnx2i_show_sq_info - return(s currently configured send queue (SQ) size |
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* @dev: device pointer |
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* @attr: device attribute (unused) |
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* @buf: buffer to return current SQ size parameter |
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* |
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* Returns current SQ size parameter, this paramater determines the number |
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* outstanding iSCSI commands supported on a connection |
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*/ |
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static ssize_t bnx2i_show_sq_info(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct bnx2i_hba *hba = bnx2i_dev_to_hba(dev); |
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return sprintf(buf, "0x%x\n", hba->max_sqes); |
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} |
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/** |
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* bnx2i_set_sq_info - update send queue (SQ) size parameter |
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* @dev: device pointer |
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* @attr: device attribute (unused) |
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* @buf: buffer to return current SQ size parameter |
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* @count: parameter buffer size |
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* |
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* Interface for user to change shared queue size allocated for each conn |
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* Must be within SQ limits and a power of 2. For the latter this is needed |
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* because of how libiscsi preallocates tasks. |
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*/ |
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static ssize_t bnx2i_set_sq_info(struct device *dev, |
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struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct bnx2i_hba *hba = bnx2i_dev_to_hba(dev); |
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u32 val; |
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int max_sq_size; |
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if (hba->ofld_conns_active) |
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goto skip_config; |
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if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) |
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max_sq_size = BNX2I_5770X_SQ_WQES_MAX; |
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else |
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max_sq_size = BNX2I_570X_SQ_WQES_MAX; |
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if (sscanf(buf, " 0x%x ", &val) > 0) { |
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if ((val >= BNX2I_SQ_WQES_MIN) && (val <= max_sq_size) && |
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(is_power_of_2(val))) |
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hba->max_sqes = val; |
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} |
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return count; |
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skip_config: |
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printk(KERN_ERR "bnx2i: device busy, cannot change SQ size\n"); |
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return 0; |
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} |
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/** |
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* bnx2i_show_ccell_info - returns command cell (HQ) size |
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* @dev: device pointer |
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* @attr: device attribute (unused) |
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* @buf: buffer to return current SQ size parameter |
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* |
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* returns per-connection TCP history queue size parameter |
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*/ |
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static ssize_t bnx2i_show_ccell_info(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct bnx2i_hba *hba = bnx2i_dev_to_hba(dev); |
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return sprintf(buf, "0x%x\n", hba->num_ccell); |
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} |
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/** |
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* bnx2i_get_link_state - set command cell (HQ) size |
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* @dev: device pointer |
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* @attr: device attribute (unused) |
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* @buf: buffer to return current SQ size parameter |
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* @count: parameter buffer size |
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* |
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* updates per-connection TCP history queue size parameter |
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*/ |
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static ssize_t bnx2i_set_ccell_info(struct device *dev, |
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struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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u32 val; |
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struct bnx2i_hba *hba = bnx2i_dev_to_hba(dev); |
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if (hba->ofld_conns_active) |
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goto skip_config; |
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if (sscanf(buf, " 0x%x ", &val) > 0) { |
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if ((val >= BNX2I_CCELLS_MIN) && |
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(val <= BNX2I_CCELLS_MAX)) { |
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hba->num_ccell = val; |
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} |
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} |
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return count; |
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skip_config: |
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printk(KERN_ERR "bnx2i: device busy, cannot change CCELL size\n"); |
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return 0; |
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} |
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static DEVICE_ATTR(sq_size, S_IRUGO | S_IWUSR, |
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bnx2i_show_sq_info, bnx2i_set_sq_info); |
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static DEVICE_ATTR(num_ccell, S_IRUGO | S_IWUSR, |
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bnx2i_show_ccell_info, bnx2i_set_ccell_info); |
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struct device_attribute *bnx2i_dev_attributes[] = { |
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&dev_attr_sq_size, |
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&dev_attr_num_ccell, |
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NULL |
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};
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