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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/scsi/bnx2i/bnx2i_sysfs.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/scsi/bnx2i/bnx2i_sysfs.c')
-rw-r--r-- | drivers/scsi/bnx2i/bnx2i_sysfs.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/drivers/scsi/bnx2i/bnx2i_sysfs.c b/drivers/scsi/bnx2i/bnx2i_sysfs.c new file mode 100644 index 000000000..d6b0bbb51 --- /dev/null +++ b/drivers/scsi/bnx2i/bnx2i_sysfs.c @@ -0,0 +1,158 @@ +/* bnx2i_sysfs.c: QLogic NetXtreme II iSCSI driver. + * + * Copyright (c) 2004 - 2013 Broadcom Corporation + * Copyright (c) 2014, QLogic Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation. + * + * Written by: Anil Veerabhadrappa (anilgv@broadcom.com) + * Previously Maintained by: Eddie Wai (eddie.wai@broadcom.com) + * Maintained by: QLogic-Storage-Upstream@qlogic.com + */ + +#include "bnx2i.h" + +/** + * bnx2i_dev_to_hba - maps dev pointer to adapter struct + * @dev: device pointer + * + * Map device to hba structure + */ +static inline struct bnx2i_hba *bnx2i_dev_to_hba(struct device *dev) +{ + struct Scsi_Host *shost = class_to_shost(dev); + return iscsi_host_priv(shost); +} + + +/** + * bnx2i_show_sq_info - return(s currently configured send queue (SQ) size + * @dev: device pointer + * @attr: device attribute (unused) + * @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_set_sq_info - update send queue (SQ) size parameter + * @dev: device pointer + * @attr: device attribute (unused) + * @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 device *dev, + struct device_attribute *attr, + 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_ccell_info - returns command cell (HQ) size + * @dev: device pointer + * @attr: device attribute (unused) + * @buf: buffer to return current SQ size parameter + * + * returns per-connection TCP history queue size parameter + */ +static ssize_t bnx2i_show_ccell_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->num_ccell); +} + + +/** + * bnx2i_set_ccell_info - set command cell (HQ) size + * @dev: device pointer + * @attr: device attribute (unused) + * @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 device *dev, + struct device_attribute *attr, + 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; +} + + +static DEVICE_ATTR(sq_size, S_IRUGO | S_IWUSR, + bnx2i_show_sq_info, bnx2i_set_sq_info); +static DEVICE_ATTR(num_ccell, S_IRUGO | S_IWUSR, + bnx2i_show_ccell_info, bnx2i_set_ccell_info); + +static struct attribute *bnx2i_dev_attributes[] = { + &dev_attr_sq_size.attr, + &dev_attr_num_ccell.attr, + NULL +}; + +static const struct attribute_group bnx2i_dev_attr_group = { + .attrs = bnx2i_dev_attributes +}; + +const struct attribute_group *bnx2i_dev_groups[] = { + &bnx2i_dev_attr_group, + NULL +}; |