1 files changed, 142 insertions, 0 deletions

diff --git a/drivers/scsi/bnx2i/bnx2i_sysfs.c b/drivers/scsi/bnx2i/bnx2i_sysfs.c
new file mode 100644
index 000000000000..96426b751eb2
--- /dev/null
+++ b/drivers/scsi/bnx2i/bnx2i_sysfs.c
@@ -0,0 +1,142 @@
+/* bnx2i_sysfs.c: Broadcom NetXtreme II iSCSI driver.
+ *
+ * Copyright (c) 2004 - 2009 Broadcom 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)
+ */
+
+#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
+ * @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
+ * @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
+ * @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_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 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);
+
+struct device_attribute *bnx2i_dev_attributes[] = {
+        &dev_attr_sq_size,
+        &dev_attr_num_ccell,
+        NULL
+};