qla_attr.c

来自「linux2.6.16版本」· C语言 代码 · 共 814 行 · 第 1/2 页

/*
 * QLogic Fibre Channel HBA Driver
 * Copyright (c)  2003-2005 QLogic Corporation
 *
 * See LICENSE.qla2xxx for copyright and licensing details.
 */
#include "qla_def.h"

#include <linux/vmalloc.h>

/* SYSFS attributes --------------------------------------------------------- */

static ssize_t
qla2x00_sysfs_read_fw_dump(struct kobject *kobj, char *buf, loff_t off,
    size_t count)
{
	struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
	    struct device, kobj)));

	if (ha->fw_dump_reading == 0)
		return 0;
	if (off > ha->fw_dump_buffer_len)
		return 0;
	if (off + count > ha->fw_dump_buffer_len)
		count = ha->fw_dump_buffer_len - off;

	memcpy(buf, &ha->fw_dump_buffer[off], count);

	return (count);
}

static ssize_t
qla2x00_sysfs_write_fw_dump(struct kobject *kobj, char *buf, loff_t off,
    size_t count)
{
	struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
	    struct device, kobj)));
	int reading;
	uint32_t dump_size;

	if (off != 0)
		return (0);

	reading = simple_strtol(buf, NULL, 10);
	switch (reading) {
	case 0:
		if (ha->fw_dump_reading == 1) {
			qla_printk(KERN_INFO, ha,
			    "Firmware dump cleared on (%ld).\n",
			    ha->host_no);

			vfree(ha->fw_dump_buffer);
			if (!IS_QLA24XX(ha) && !IS_QLA25XX(ha))
				free_pages((unsigned long)ha->fw_dump,
				    ha->fw_dump_order);

			ha->fw_dump_reading = 0;
			ha->fw_dump_buffer = NULL;
			ha->fw_dump = NULL;
			ha->fw_dumped = 0;
		}
		break;
	case 1:
		if ((ha->fw_dump || ha->fw_dumped) && !ha->fw_dump_reading) {
			ha->fw_dump_reading = 1;

			if (IS_QLA24XX(ha) || IS_QLA25XX(ha))
				dump_size = FW_DUMP_SIZE_24XX;
			else {
				dump_size = FW_DUMP_SIZE_1M;
				if (ha->fw_memory_size < 0x20000)
					dump_size = FW_DUMP_SIZE_128K;
				else if (ha->fw_memory_size < 0x80000)
					dump_size = FW_DUMP_SIZE_512K;
			}
			ha->fw_dump_buffer = (char *)vmalloc(dump_size);
			if (ha->fw_dump_buffer == NULL) {
				qla_printk(KERN_WARNING, ha,
				    "Unable to allocate memory for firmware "
				    "dump buffer (%d).\n", dump_size);

				ha->fw_dump_reading = 0;
				return (count);
			}
			qla_printk(KERN_INFO, ha,
			    "Firmware dump ready for read on (%ld).\n",
			    ha->host_no);
			memset(ha->fw_dump_buffer, 0, dump_size);
			ha->isp_ops.ascii_fw_dump(ha);
			ha->fw_dump_buffer_len = strlen(ha->fw_dump_buffer);
		}
		break;
	}
	return (count);
}

static struct bin_attribute sysfs_fw_dump_attr = {
	.attr = {
		.name = "fw_dump",
		.mode = S_IRUSR | S_IWUSR,
		.owner = THIS_MODULE,
	},
	.size = 0,
	.read = qla2x00_sysfs_read_fw_dump,
	.write = qla2x00_sysfs_write_fw_dump,
};

static ssize_t
qla2x00_sysfs_read_nvram(struct kobject *kobj, char *buf, loff_t off,
    size_t count)
{
	struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
	    struct device, kobj)));
	unsigned long	flags;

	if (!capable(CAP_SYS_ADMIN) || off != 0)
		return 0;

	/* Read NVRAM. */
	spin_lock_irqsave(&ha->hardware_lock, flags);
	ha->isp_ops.read_nvram(ha, (uint8_t *)buf, ha->nvram_base,
	    ha->nvram_size);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	return ha->nvram_size;
}

static ssize_t
qla2x00_sysfs_write_nvram(struct kobject *kobj, char *buf, loff_t off,
    size_t count)
{
	struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
	    struct device, kobj)));
	unsigned long	flags;
	uint16_t	cnt;

	if (!capable(CAP_SYS_ADMIN) || off != 0 || count != ha->nvram_size)
		return 0;

	/* Checksum NVRAM. */
	if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {
		uint32_t *iter;
		uint32_t chksum;

		iter = (uint32_t *)buf;
		chksum = 0;
		for (cnt = 0; cnt < ((count >> 2) - 1); cnt++)
			chksum += le32_to_cpu(*iter++);
		chksum = ~chksum + 1;
		*iter = cpu_to_le32(chksum);
	} else {
		uint8_t *iter;
		uint8_t chksum;

		iter = (uint8_t *)buf;
		chksum = 0;
		for (cnt = 0; cnt < count - 1; cnt++)
			chksum += *iter++;
		chksum = ~chksum + 1;
		*iter = chksum;
	}

	/* Write NVRAM. */
	spin_lock_irqsave(&ha->hardware_lock, flags);
	ha->isp_ops.write_nvram(ha, (uint8_t *)buf, ha->nvram_base, count);
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	return (count);
}

static struct bin_attribute sysfs_nvram_attr = {
	.attr = {
		.name = "nvram",
		.mode = S_IRUSR | S_IWUSR,
		.owner = THIS_MODULE,
	},
	.size = 512,
	.read = qla2x00_sysfs_read_nvram,
	.write = qla2x00_sysfs_write_nvram,
};

static ssize_t
qla2x00_sysfs_read_optrom(struct kobject *kobj, char *buf, loff_t off,
    size_t count)
{
	struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
	    struct device, kobj)));

	if (ha->optrom_state != QLA_SREADING)
		return 0;
	if (off > ha->optrom_size)
		return 0;
	if (off + count > ha->optrom_size)
		count = ha->optrom_size - off;

	memcpy(buf, &ha->optrom_buffer[off], count);

	return count;
}

static ssize_t
qla2x00_sysfs_write_optrom(struct kobject *kobj, char *buf, loff_t off,
    size_t count)
{
	struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
	    struct device, kobj)));

	if (ha->optrom_state != QLA_SWRITING)
		return -EINVAL;
	if (off > ha->optrom_size)
		return -ERANGE;
	if (off + count > ha->optrom_size)
		count = ha->optrom_size - off;

	memcpy(&ha->optrom_buffer[off], buf, count);

	return count;
}

static struct bin_attribute sysfs_optrom_attr = {
	.attr = {
		.name = "optrom",
		.mode = S_IRUSR | S_IWUSR,
		.owner = THIS_MODULE,
	},
	.size = OPTROM_SIZE_24XX,
	.read = qla2x00_sysfs_read_optrom,
	.write = qla2x00_sysfs_write_optrom,
};

static ssize_t
qla2x00_sysfs_write_optrom_ctl(struct kobject *kobj, char *buf, loff_t off,
    size_t count)
{
	struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
	    struct device, kobj)));
	int val;

	if (off)
		return 0;

	if (sscanf(buf, "%d", &val) != 1)
		return -EINVAL;

	switch (val) {
	case 0:
		if (ha->optrom_state != QLA_SREADING &&
		    ha->optrom_state != QLA_SWRITING)
			break;

		ha->optrom_state = QLA_SWAITING;
		vfree(ha->optrom_buffer);
		ha->optrom_buffer = NULL;
		break;
	case 1:
		if (ha->optrom_state != QLA_SWAITING)
			break;

		ha->optrom_state = QLA_SREADING;
		ha->optrom_buffer = (uint8_t *)vmalloc(ha->optrom_size);
		if (ha->optrom_buffer == NULL) {
			qla_printk(KERN_WARNING, ha,
			    "Unable to allocate memory for optrom retrieval "
			    "(%x).\n", ha->optrom_size);

			ha->optrom_state = QLA_SWAITING;
			return count;
		}

		memset(ha->optrom_buffer, 0, ha->optrom_size);
		ha->isp_ops.read_optrom(ha, ha->optrom_buffer, 0,
		    ha->optrom_size);
		break;
	case 2:
		if (ha->optrom_state != QLA_SWAITING)
			break;

		ha->optrom_state = QLA_SWRITING;
		ha->optrom_buffer = (uint8_t *)vmalloc(ha->optrom_size);
		if (ha->optrom_buffer == NULL) {
			qla_printk(KERN_WARNING, ha,
			    "Unable to allocate memory for optrom update "
			    "(%x).\n", ha->optrom_size);

			ha->optrom_state = QLA_SWAITING;
			return count;
		}
		memset(ha->optrom_buffer, 0, ha->optrom_size);
		break;
	case 3:
		if (ha->optrom_state != QLA_SWRITING)
			break;

		ha->isp_ops.write_optrom(ha, ha->optrom_buffer, 0,
		    ha->optrom_size);
		break;
	}
	return count;
}

static struct bin_attribute sysfs_optrom_ctl_attr = {
	.attr = {
		.name = "optrom_ctl",
		.mode = S_IWUSR,
		.owner = THIS_MODULE,
	},
	.size = 0,
	.write = qla2x00_sysfs_write_optrom_ctl,
};

void
qla2x00_alloc_sysfs_attr(scsi_qla_host_t *ha)
{
	struct Scsi_Host *host = ha->host;

	sysfs_create_bin_file(&host->shost_gendev.kobj, &sysfs_fw_dump_attr);
	sysfs_create_bin_file(&host->shost_gendev.kobj, &sysfs_nvram_attr);
	sysfs_create_bin_file(&host->shost_gendev.kobj, &sysfs_optrom_attr);
	sysfs_create_bin_file(&host->shost_gendev.kobj,
	    &sysfs_optrom_ctl_attr);
}

void
qla2x00_free_sysfs_attr(scsi_qla_host_t *ha)
{
	struct Scsi_Host *host = ha->host;

	sysfs_remove_bin_file(&host->shost_gendev.kobj, &sysfs_fw_dump_attr);
	sysfs_remove_bin_file(&host->shost_gendev.kobj, &sysfs_nvram_attr);
	sysfs_remove_bin_file(&host->shost_gendev.kobj, &sysfs_optrom_attr);
	sysfs_remove_bin_file(&host->shost_gendev.kobj,
	    &sysfs_optrom_ctl_attr);

	if (ha->beacon_blink_led == 1)
		ha->isp_ops.beacon_off(ha);
}

/* Scsi_Host attributes. */

static ssize_t
qla2x00_drvr_version_show(struct class_device *cdev, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%s\n", qla2x00_version_str);
}

static ssize_t
qla2x00_fw_version_show(struct class_device *cdev, char *buf)
{
	scsi_qla_host_t *ha = to_qla_host(class_to_shost(cdev));
	char fw_str[30];

	return snprintf(buf, PAGE_SIZE, "%s\n",
	    ha->isp_ops.fw_version_str(ha, fw_str));
}

static ssize_t
qla2x00_serial_num_show(struct class_device *cdev, char *buf)
{
	scsi_qla_host_t *ha = to_qla_host(class_to_shost(cdev));
	uint32_t sn;

	sn = ((ha->serial0 & 0x1f) << 16) | (ha->serial2 << 8) | ha->serial1;
	return snprintf(buf, PAGE_SIZE, "%c%05d\n", 'A' + sn / 100000,
	    sn % 100000);
}

static ssize_t
qla2x00_isp_name_show(struct class_device *cdev, char *buf)
{
	scsi_qla_host_t *ha = to_qla_host(class_to_shost(cdev));
	return snprintf(buf, PAGE_SIZE, "ISP%04X\n", ha->pdev->device);
}

static ssize_t
qla2x00_isp_id_show(struct class_device *cdev, char *buf)
{
	scsi_qla_host_t *ha = to_qla_host(class_to_shost(cdev));
	return snprintf(buf, PAGE_SIZE, "%04x %04x %04x %04x\n",
	    ha->product_id[0], ha->product_id[1], ha->product_id[2],
	    ha->product_id[3]);
}

static ssize_t
qla2x00_model_name_show(struct class_device *cdev, char *buf)
{
	scsi_qla_host_t *ha = to_qla_host(class_to_shost(cdev));
	return snprintf(buf, PAGE_SIZE, "%s\n", ha->model_number);
}

static ssize_t
qla2x00_model_desc_show(struct class_device *cdev, char *buf)
{
	scsi_qla_host_t *ha = to_qla_host(class_to_shost(cdev));
	return snprintf(buf, PAGE_SIZE, "%s\n",
	    ha->model_desc ? ha->model_desc: "");
}

static ssize_t
qla2x00_pci_info_show(struct class_device *cdev, char *buf)
{
	scsi_qla_host_t *ha = to_qla_host(class_to_shost(cdev));
	char pci_info[30];

	return snprintf(buf, PAGE_SIZE, "%s\n",
	    ha->isp_ops.pci_info_str(ha, pci_info));
}