qla_attr.c

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/*
 * 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/kthread.h>
#include <linux/vmalloc.h>

int qla24xx_vport_disable(struct fc_vport *, bool);

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

static ssize_t
qla2x00_sysfs_read_fw_dump(struct kobject *kobj,
			   struct bin_attribute *bin_attr,
			   char *buf, loff_t off, size_t count)
{
	struct scsi_qla_host *ha = shost_priv(dev_to_shost(container_of(kobj,
	    struct device, kobj)));
	char *rbuf = (char *)ha->fw_dump;

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

	memcpy(buf, &rbuf[off], count);

	return (count);
}

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

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

	reading = simple_strtol(buf, NULL, 10);
	switch (reading) {
	case 0:
		if (!ha->fw_dump_reading)
			break;

		qla_printk(KERN_INFO, ha,
		    "Firmware dump cleared on (%ld).\n", ha->host_no);

		ha->fw_dump_reading = 0;
		ha->fw_dumped = 0;
		break;
	case 1:
		if (ha->fw_dumped && !ha->fw_dump_reading) {
			ha->fw_dump_reading = 1;

			qla_printk(KERN_INFO, ha,
			    "Raw firmware dump ready for read on (%ld).\n",
			    ha->host_no);
		}
		break;
	case 2:
		qla2x00_alloc_fw_dump(ha);
		break;
	}
	return (count);
}

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

static ssize_t
qla2x00_sysfs_read_nvram(struct kobject *kobj,
			 struct bin_attribute *bin_attr,
			 char *buf, loff_t off, size_t count)
{
	struct scsi_qla_host *ha = shost_priv(dev_to_shost(container_of(kobj,
	    struct device, kobj)));
	int		size = ha->nvram_size;
	char		*nvram_cache = ha->nvram;

	if (!capable(CAP_SYS_ADMIN) || off > size || count == 0)
		return 0;
	if (off + count > size) {
		size -= off;
		count = size;
	}

	/* Read NVRAM data from cache. */
	memcpy(buf, &nvram_cache[off], count);

	return count;
}

static ssize_t
qla2x00_sysfs_write_nvram(struct kobject *kobj,
			  struct bin_attribute *bin_attr,
			  char *buf, loff_t off, size_t count)
{
	struct scsi_qla_host *ha = shost_priv(dev_to_shost(container_of(kobj,
	    struct device, kobj)));
	uint16_t	cnt;

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

	/* Checksum NVRAM. */
	if (IS_FWI2_CAPABLE(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. */
	ha->isp_ops->write_nvram(ha, (uint8_t *)buf, ha->nvram_base, count);
	ha->isp_ops->read_nvram(ha, (uint8_t *)ha->nvram, ha->nvram_base,
	    count);

	set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);

	return (count);
}

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

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

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

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

	return count;
}

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

	if (ha->optrom_state != QLA_SWRITING)
		return -EINVAL;
	if (off > ha->optrom_region_size)
		return -ERANGE;
	if (off + count > ha->optrom_region_size)
		count = ha->optrom_region_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,
	},
	.size = 0,
	.read = qla2x00_sysfs_read_optrom,
	.write = qla2x00_sysfs_write_optrom,
};

static ssize_t
qla2x00_sysfs_write_optrom_ctl(struct kobject *kobj,
			       struct bin_attribute *bin_attr,
			       char *buf, loff_t off, size_t count)
{
	struct scsi_qla_host *ha = shost_priv(dev_to_shost(container_of(kobj,
	    struct device, kobj)));
	uint32_t start = 0;
	uint32_t size = ha->optrom_size;
	int val, valid;

	if (off)
		return 0;

	if (sscanf(buf, "%d:%x:%x", &val, &start, &size) < 1)
		return -EINVAL;
	if (start > ha->optrom_size)
		return -EINVAL;

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

		ha->optrom_state = QLA_SWAITING;

		DEBUG2(qla_printk(KERN_INFO, ha,
		    "Freeing flash region allocation -- 0x%x bytes.\n",
		    ha->optrom_region_size));

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

		if (start & 0xfff) {
			qla_printk(KERN_WARNING, ha,
			    "Invalid start region 0x%x/0x%x.\n", start, size);
			return -EINVAL;
		}

		ha->optrom_region_start = start;
		ha->optrom_region_size = start + size > ha->optrom_size ?
		    ha->optrom_size - start : size;

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

			ha->optrom_state = QLA_SWAITING;
			return count;
		}

		DEBUG2(qla_printk(KERN_INFO, ha,
		    "Reading flash region -- 0x%x/0x%x.\n",
		    ha->optrom_region_start, ha->optrom_region_size));

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

		/*
		 * We need to be more restrictive on which FLASH regions are
		 * allowed to be updated via user-space.  Regions accessible
		 * via this method include:
		 *
		 * ISP21xx/ISP22xx/ISP23xx type boards:
		 *
		 * 	0x000000 -> 0x020000 -- Boot code.
		 *
		 * ISP2322/ISP24xx type boards:
		 *
		 * 	0x000000 -> 0x07ffff -- Boot code.
		 * 	0x080000 -> 0x0fffff -- Firmware.
		 *
		 * ISP25xx type boards:
		 *
		 * 	0x000000 -> 0x07ffff -- Boot code.
		 * 	0x080000 -> 0x0fffff -- Firmware.
		 * 	0x120000 -> 0x12ffff -- VPD and HBA parameters.
		 */
		valid = 0;
		if (ha->optrom_size == OPTROM_SIZE_2300 && start == 0)
			valid = 1;
		else if (start == (FA_BOOT_CODE_ADDR*4) ||
		    start == (FA_RISC_CODE_ADDR*4))
			valid = 1;
		else if (IS_QLA25XX(ha) && start == (FA_VPD_NVRAM_ADDR*4))
		    valid = 1;
		if (!valid) {
			qla_printk(KERN_WARNING, ha,
			    "Invalid start region 0x%x/0x%x.\n", start, size);
			return -EINVAL;
		}

		ha->optrom_region_start = start;
		ha->optrom_region_size = start + size > ha->optrom_size ?
		    ha->optrom_size - start : size;

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

			ha->optrom_state = QLA_SWAITING;
			return count;
		}

		DEBUG2(qla_printk(KERN_INFO, ha,
		    "Staging flash region write -- 0x%x/0x%x.\n",
		    ha->optrom_region_start, ha->optrom_region_size));

		memset(ha->optrom_buffer, 0, ha->optrom_region_size);
		break;
	case 3:
		if (ha->optrom_state != QLA_SWRITING)
			break;

		DEBUG2(qla_printk(KERN_INFO, ha,
		    "Writing flash region -- 0x%x/0x%x.\n",
		    ha->optrom_region_start, ha->optrom_region_size));

		ha->isp_ops->write_optrom(ha, ha->optrom_buffer,
		    ha->optrom_region_start, ha->optrom_region_size);
		break;
	default:
		count = -EINVAL;
	}
	return count;
}

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

static ssize_t
qla2x00_sysfs_read_vpd(struct kobject *kobj,
		       struct bin_attribute *bin_attr,
		       char *buf, loff_t off, size_t count)
{
	struct scsi_qla_host *ha = shost_priv(dev_to_shost(container_of(kobj,
	    struct device, kobj)));
	int           size = ha->vpd_size;
	char          *vpd_cache = ha->vpd;

	if (!capable(CAP_SYS_ADMIN) || off > size || count == 0)
		return 0;
	if (off + count > size) {
		size -= off;
		count = size;
	}

	/* Read NVRAM data from cache. */
	memcpy(buf, &vpd_cache[off], count);

	return count;
}

static ssize_t
qla2x00_sysfs_write_vpd(struct kobject *kobj,
			struct bin_attribute *bin_attr,
			char *buf, loff_t off, size_t count)
{
	struct scsi_qla_host *ha = shost_priv(dev_to_shost(container_of(kobj,
	    struct device, kobj)));

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

	/* Write NVRAM. */
	ha->isp_ops->write_nvram(ha, (uint8_t *)buf, ha->vpd_base, count);
	ha->isp_ops->read_nvram(ha, (uint8_t *)ha->vpd, ha->vpd_base, count);

	return count;
}

static struct bin_attribute sysfs_vpd_attr = {
	.attr = {
		.name = "vpd",
		.mode = S_IRUSR | S_IWUSR,
	},
	.size = 0,
	.read = qla2x00_sysfs_read_vpd,
	.write = qla2x00_sysfs_write_vpd,
};

static ssize_t