zfcp-objs := zfcp_aux.o zfcp_ccw.o zfcp_scsi.o zfcp_erp.o zfcp_qdio.o \
zfcp_fsf.o zfcp_dbf.o zfcp_sysfs_adapter.o zfcp_sysfs_port.o \
- zfcp_sysfs_unit.o zfcp_sysfs_driver.o zfcp_fc.o
+ zfcp_sysfs_unit.o zfcp_sysfs_driver.o zfcp_fc.o zfcp_cfdc.o
obj-$(CONFIG_ZFCP) += zfcp.o
* Ralph Wuerthner
*/
+#include <linux/miscdevice.h>
#include "zfcp_ext.h"
/* accumulated log level (module parameter) */
/* written against the module interface */
static int __init zfcp_module_init(void);
-/* miscellaneous */
-static int zfcp_sg_list_alloc(struct zfcp_sg_list *, size_t);
-static void zfcp_sg_list_free(struct zfcp_sg_list *);
-static int zfcp_sg_list_copy_from_user(struct zfcp_sg_list *,
- void __user *, size_t);
-static int zfcp_sg_list_copy_to_user(void __user *,
- struct zfcp_sg_list *, size_t);
-static long zfcp_cfdc_dev_ioctl(struct file *, unsigned int, unsigned long);
-
-#define ZFCP_CFDC_IOC_MAGIC 0xDD
-#define ZFCP_CFDC_IOC \
- _IOWR(ZFCP_CFDC_IOC_MAGIC, 0, struct zfcp_cfdc_sense_data)
-
-
-static const struct file_operations zfcp_cfdc_fops = {
- .unlocked_ioctl = zfcp_cfdc_dev_ioctl,
-#ifdef CONFIG_COMPAT
- .compat_ioctl = zfcp_cfdc_dev_ioctl
-#endif
-};
-
-static struct miscdevice zfcp_cfdc_misc = {
- .minor = ZFCP_CFDC_DEV_MINOR,
- .name = ZFCP_CFDC_DEV_NAME,
- .fops = &zfcp_cfdc_fops
-};
-
/*********************** KERNEL/MODULE PARAMETERS ***************************/
/* declare driver module init/cleanup functions */
goto out_misc;
}
- ZFCP_LOG_TRACE("major/minor for zfcp_cfdc: %d/%d\n",
- ZFCP_CFDC_DEV_MAJOR, zfcp_cfdc_misc.minor);
-
/* Initialise proc semaphores */
sema_init(&zfcp_data.config_sema, 1);
return retval;
}
-/*
- * function: zfcp_cfdc_dev_ioctl
- *
- * purpose: Handle control file upload/download transaction via IOCTL
- * interface
- *
- * returns: 0 - Operation completed successfuly
- * -ENOTTY - Unknown IOCTL command
- * -EINVAL - Invalid sense data record
- * -ENXIO - The FCP adapter is not available
- * -EOPNOTSUPP - The FCP adapter does not have CFDC support
- * -ENOMEM - Insufficient memory
- * -EFAULT - User space memory I/O operation fault
- * -EPERM - Cannot create or queue FSF request or create SBALs
- * -ERESTARTSYS- Received signal (is mapped to EAGAIN by VFS)
- */
-static long
-zfcp_cfdc_dev_ioctl(struct file *file, unsigned int command,
- unsigned long buffer)
-{
- struct zfcp_cfdc_sense_data *sense_data, __user *sense_data_user;
- struct zfcp_adapter *adapter = NULL;
- struct zfcp_fsf_req *fsf_req = NULL;
- struct zfcp_sg_list *sg_list = NULL;
- u32 fsf_command, option;
- char *bus_id = NULL;
- int retval = 0;
-
- sense_data = kmalloc(sizeof(struct zfcp_cfdc_sense_data), GFP_KERNEL);
- if (sense_data == NULL) {
- retval = -ENOMEM;
- goto out;
- }
-
- sg_list = kzalloc(sizeof(struct zfcp_sg_list), GFP_KERNEL);
- if (sg_list == NULL) {
- retval = -ENOMEM;
- goto out;
- }
-
- if (command != ZFCP_CFDC_IOC) {
- ZFCP_LOG_INFO("IOC request code 0x%x invalid\n", command);
- retval = -ENOTTY;
- goto out;
- }
-
- if ((sense_data_user = (void __user *) buffer) == NULL) {
- ZFCP_LOG_INFO("sense data record is required\n");
- retval = -EINVAL;
- goto out;
- }
-
- retval = copy_from_user(sense_data, sense_data_user,
- sizeof(struct zfcp_cfdc_sense_data));
- if (retval) {
- retval = -EFAULT;
- goto out;
- }
-
- if (sense_data->signature != ZFCP_CFDC_SIGNATURE) {
- ZFCP_LOG_INFO("invalid sense data request signature 0x%08x\n",
- ZFCP_CFDC_SIGNATURE);
- retval = -EINVAL;
- goto out;
- }
-
- switch (sense_data->command) {
-
- case ZFCP_CFDC_CMND_DOWNLOAD_NORMAL:
- fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
- option = FSF_CFDC_OPTION_NORMAL_MODE;
- break;
-
- case ZFCP_CFDC_CMND_DOWNLOAD_FORCE:
- fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
- option = FSF_CFDC_OPTION_FORCE;
- break;
-
- case ZFCP_CFDC_CMND_FULL_ACCESS:
- fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
- option = FSF_CFDC_OPTION_FULL_ACCESS;
- break;
-
- case ZFCP_CFDC_CMND_RESTRICTED_ACCESS:
- fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
- option = FSF_CFDC_OPTION_RESTRICTED_ACCESS;
- break;
-
- case ZFCP_CFDC_CMND_UPLOAD:
- fsf_command = FSF_QTCB_UPLOAD_CONTROL_FILE;
- option = 0;
- break;
-
- default:
- ZFCP_LOG_INFO("invalid command code 0x%08x\n",
- sense_data->command);
- retval = -EINVAL;
- goto out;
- }
-
- bus_id = kmalloc(BUS_ID_SIZE, GFP_KERNEL);
- if (bus_id == NULL) {
- retval = -ENOMEM;
- goto out;
- }
- snprintf(bus_id, BUS_ID_SIZE, "%d.%d.%04x",
- (sense_data->devno >> 24),
- (sense_data->devno >> 16) & 0xFF,
- (sense_data->devno & 0xFFFF));
-
- read_lock_irq(&zfcp_data.config_lock);
- adapter = zfcp_get_adapter_by_busid(bus_id);
- if (adapter)
- zfcp_adapter_get(adapter);
- read_unlock_irq(&zfcp_data.config_lock);
-
- kfree(bus_id);
-
- if (adapter == NULL) {
- ZFCP_LOG_INFO("invalid adapter\n");
- retval = -ENXIO;
- goto out;
- }
-
- if (sense_data->command & ZFCP_CFDC_WITH_CONTROL_FILE) {
- retval = zfcp_sg_list_alloc(sg_list,
- ZFCP_CFDC_MAX_CONTROL_FILE_SIZE);
- if (retval) {
- retval = -ENOMEM;
- goto out;
- }
- }
-
- if ((sense_data->command & ZFCP_CFDC_DOWNLOAD) &&
- (sense_data->command & ZFCP_CFDC_WITH_CONTROL_FILE)) {
- retval = zfcp_sg_list_copy_from_user(
- sg_list, &sense_data_user->control_file,
- ZFCP_CFDC_MAX_CONTROL_FILE_SIZE);
- if (retval) {
- retval = -EFAULT;
- goto out;
- }
- }
-
- retval = zfcp_fsf_control_file(adapter, &fsf_req, fsf_command,
- option, sg_list);
- if (retval)
- goto out;
-
- if ((fsf_req->qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
- (fsf_req->qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
- retval = -ENXIO;
- goto out;
- }
-
- sense_data->fsf_status = fsf_req->qtcb->header.fsf_status;
- memcpy(&sense_data->fsf_status_qual,
- &fsf_req->qtcb->header.fsf_status_qual,
- sizeof(union fsf_status_qual));
- memcpy(&sense_data->payloads, &fsf_req->qtcb->bottom.support.els, 256);
-
- retval = copy_to_user(sense_data_user, sense_data,
- sizeof(struct zfcp_cfdc_sense_data));
- if (retval) {
- retval = -EFAULT;
- goto out;
- }
-
- if (sense_data->command & ZFCP_CFDC_UPLOAD) {
- retval = zfcp_sg_list_copy_to_user(
- &sense_data_user->control_file, sg_list,
- ZFCP_CFDC_MAX_CONTROL_FILE_SIZE);
- if (retval) {
- retval = -EFAULT;
- goto out;
- }
- }
-
- out:
- if (fsf_req != NULL)
- zfcp_fsf_req_free(fsf_req);
-
- if ((adapter != NULL) && (retval != -ENXIO))
- zfcp_adapter_put(adapter);
-
- if (sg_list != NULL) {
- zfcp_sg_list_free(sg_list);
- kfree(sg_list);
- }
-
- kfree(sense_data);
-
- return retval;
-}
-
-
-/**
- * zfcp_sg_list_alloc - create a scatter-gather list of the specified size
- * @sg_list: structure describing a scatter gather list
- * @size: size of scatter-gather list
- * Return: 0 on success, else -ENOMEM
- *
- * In sg_list->sg a pointer to the created scatter-gather list is returned,
- * or NULL if we run out of memory. sg_list->count specifies the number of
- * elements of the scatter-gather list. The maximum size of a single element
- * in the scatter-gather list is PAGE_SIZE.
- */
-static int
-zfcp_sg_list_alloc(struct zfcp_sg_list *sg_list, size_t size)
-{
- struct scatterlist *sg;
- unsigned int i;
- int retval = 0;
- void *address;
-
- BUG_ON(sg_list == NULL);
-
- sg_list->count = size >> PAGE_SHIFT;
- if (size & ~PAGE_MASK)
- sg_list->count++;
- sg_list->sg = kcalloc(sg_list->count, sizeof(struct scatterlist),
- GFP_KERNEL);
- if (sg_list->sg == NULL) {
- sg_list->count = 0;
- retval = -ENOMEM;
- goto out;
- }
- sg_init_table(sg_list->sg, sg_list->count);
-
- for (i = 0, sg = sg_list->sg; i < sg_list->count; i++, sg++) {
- address = (void *) get_zeroed_page(GFP_KERNEL);
- if (address == NULL) {
- sg_list->count = i;
- zfcp_sg_list_free(sg_list);
- retval = -ENOMEM;
- goto out;
- }
- zfcp_address_to_sg(address, sg, min(size, PAGE_SIZE));
- size -= sg->length;
- }
-
- out:
- return retval;
-}
-
-
-/**
- * zfcp_sg_list_free - free memory of a scatter-gather list
- * @sg_list: structure describing a scatter-gather list
- *
- * Memory for each element in the scatter-gather list is freed.
- * Finally sg_list->sg is freed itself and sg_list->count is reset.
- */
-static void
-zfcp_sg_list_free(struct zfcp_sg_list *sg_list)
-{
- struct scatterlist *sg;
- unsigned int i;
-
- BUG_ON(sg_list == NULL);
-
- for (i = 0, sg = sg_list->sg; i < sg_list->count; i++, sg++)
- free_page((unsigned long) zfcp_sg_to_address(sg));
-
- sg_list->count = 0;
- kfree(sg_list->sg);
-}
-
-/**
- * zfcp_sg_size - determine size of a scatter-gather list
- * @sg: array of (struct scatterlist)
- * @sg_count: elements in array
- * Return: size of entire scatter-gather list
- */
-static size_t zfcp_sg_size(struct scatterlist *sg, unsigned int sg_count)
-{
- unsigned int i;
- struct scatterlist *p;
- size_t size;
-
- size = 0;
- for (i = 0, p = sg; i < sg_count; i++, p++) {
- BUG_ON(p == NULL);
- size += p->length;
- }
-
- return size;
-}
-
-
-/**
- * zfcp_sg_list_copy_from_user -copy data from user space to scatter-gather list
- * @sg_list: structure describing a scatter-gather list
- * @user_buffer: pointer to buffer in user space
- * @size: number of bytes to be copied
- * Return: 0 on success, -EFAULT if copy_from_user fails.
- */
-static int
-zfcp_sg_list_copy_from_user(struct zfcp_sg_list *sg_list,
- void __user *user_buffer,
- size_t size)
-{
- struct scatterlist *sg;
- unsigned int length;
- void *zfcp_buffer;
- int retval = 0;
-
- BUG_ON(sg_list == NULL);
-
- if (zfcp_sg_size(sg_list->sg, sg_list->count) < size)
- return -EFAULT;
-
- for (sg = sg_list->sg; size > 0; sg++) {
- length = min((unsigned int)size, sg->length);
- zfcp_buffer = zfcp_sg_to_address(sg);
- if (copy_from_user(zfcp_buffer, user_buffer, length)) {
- retval = -EFAULT;
- goto out;
- }
- user_buffer += length;
- size -= length;
- }
-
- out:
- return retval;
-}
-
-
-/**
- * zfcp_sg_list_copy_to_user - copy data from scatter-gather list to user space
- * @user_buffer: pointer to buffer in user space
- * @sg_list: structure describing a scatter-gather list
- * @size: number of bytes to be copied
- * Return: 0 on success, -EFAULT if copy_to_user fails
- */
-static int
-zfcp_sg_list_copy_to_user(void __user *user_buffer,
- struct zfcp_sg_list *sg_list,
- size_t size)
-{
- struct scatterlist *sg;
- unsigned int length;
- void *zfcp_buffer;
- int retval = 0;
-
- BUG_ON(sg_list == NULL);
-
- if (zfcp_sg_size(sg_list->sg, sg_list->count) < size)
- return -EFAULT;
-
- for (sg = sg_list->sg; size > 0; sg++) {
- length = min((unsigned int) size, sg->length);
- zfcp_buffer = zfcp_sg_to_address(sg);
- if (copy_to_user(user_buffer, zfcp_buffer, length)) {
- retval = -EFAULT;
- goto out;
- }
- user_buffer += length;
- size -= length;
- }
-
- out:
- return retval;
-}
-
-
#undef ZFCP_LOG_AREA
/****************************************************************/
return 0;
}
+void zfcp_sg_free_table(struct scatterlist *sg, int count)
+{
+ int i;
+
+ for (i = 0; i < count; i++, sg++)
+ if (sg)
+ free_page((unsigned long) sg_virt(sg));
+ else
+ break;
+}
+
+int zfcp_sg_setup_table(struct scatterlist *sg, int count)
+{
+ void *addr;
+ int i;
+
+ sg_init_table(sg, count);
+ for (i = 0; i < count; i++, sg++) {
+ addr = (void *) get_zeroed_page(GFP_KERNEL);
+ if (!addr) {
+ zfcp_sg_free_table(sg, i);
+ return -ENOMEM;
+ }
+ sg_set_buf(sg, addr, PAGE_SIZE);
+ }
+ return 0;
+}
+
#undef ZFCP_LOG_AREA
--- /dev/null
+/*
+ * zfcp device driver
+ *
+ * Userspace interface for accessing the
+ * Access Control Lists / Control File Data Channel
+ *
+ * Copyright IBM Corporation 2008
+ */
+
+#include <linux/types.h>
+#include <linux/miscdevice.h>
+#include <asm/ccwdev.h>
+#include "zfcp_def.h"
+#include "zfcp_ext.h"
+#include "zfcp_fsf.h"
+
+#define ZFCP_CFDC_CMND_DOWNLOAD_NORMAL 0x00010001
+#define ZFCP_CFDC_CMND_DOWNLOAD_FORCE 0x00010101
+#define ZFCP_CFDC_CMND_FULL_ACCESS 0x00000201
+#define ZFCP_CFDC_CMND_RESTRICTED_ACCESS 0x00000401
+#define ZFCP_CFDC_CMND_UPLOAD 0x00010002
+
+#define ZFCP_CFDC_DOWNLOAD 0x00000001
+#define ZFCP_CFDC_UPLOAD 0x00000002
+#define ZFCP_CFDC_WITH_CONTROL_FILE 0x00010000
+
+#define ZFCP_CFDC_IOC_MAGIC 0xDD
+#define ZFCP_CFDC_IOC \
+ _IOWR(ZFCP_CFDC_IOC_MAGIC, 0, struct zfcp_cfdc_data)
+
+/**
+ * struct zfcp_cfdc_data - data for ioctl cfdc interface
+ * @signature: request signature
+ * @devno: FCP adapter device number
+ * @command: command code
+ * @fsf_status: returns status of FSF command to userspace
+ * @fsf_status_qual: returned to userspace
+ * @payloads: access conflicts list
+ * @control_file: access control table
+ */
+struct zfcp_cfdc_data {
+ u32 signature;
+ u32 devno;
+ u32 command;
+ u32 fsf_status;
+ u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE];
+ u8 payloads[256];
+ u8 control_file[0];
+};
+
+static int zfcp_cfdc_copy_from_user(struct scatterlist *sg,
+ void __user *user_buffer)
+{
+ unsigned int length;
+ unsigned int size = ZFCP_CFDC_MAX_SIZE;
+
+ while (size) {
+ length = min((unsigned int)size, sg->length);
+ if (copy_from_user(sg_virt(sg++), user_buffer, length))
+ return -EFAULT;
+ user_buffer += length;
+ size -= length;
+ }
+ return 0;
+}
+
+static int zfcp_cfdc_copy_to_user(void __user *user_buffer,
+ struct scatterlist *sg)
+{
+ unsigned int length;
+ unsigned int size = ZFCP_CFDC_MAX_SIZE;
+
+ while (size) {
+ length = min((unsigned int) size, sg->length);
+ if (copy_to_user(user_buffer, sg_virt(sg++), length))
+ return -EFAULT;
+ user_buffer += length;
+ size -= length;
+ }
+ return 0;
+}
+
+static struct zfcp_adapter *zfcp_cfdc_get_adapter(u32 devno)
+{
+ struct zfcp_adapter *adapter = NULL, *cur_adapter;
+ struct ccw_dev_id dev_id;
+
+ read_lock_irq(&zfcp_data.config_lock);
+ list_for_each_entry(cur_adapter, &zfcp_data.adapter_list_head, list) {
+ ccw_device_get_id(cur_adapter->ccw_device, &dev_id);
+ if (dev_id.devno == devno) {
+ adapter = cur_adapter;
+ zfcp_adapter_get(adapter);
+ break;
+ }
+ }
+ read_unlock_irq(&zfcp_data.config_lock);
+ return adapter;
+}
+
+static int zfcp_cfdc_set_fsf(struct zfcp_fsf_cfdc *fsf_cfdc, int command)
+{
+ switch (command) {
+ case ZFCP_CFDC_CMND_DOWNLOAD_NORMAL:
+ fsf_cfdc->command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
+ fsf_cfdc->option = FSF_CFDC_OPTION_NORMAL_MODE;
+ break;
+ case ZFCP_CFDC_CMND_DOWNLOAD_FORCE:
+ fsf_cfdc->command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
+ fsf_cfdc->option = FSF_CFDC_OPTION_FORCE;
+ break;
+ case ZFCP_CFDC_CMND_FULL_ACCESS:
+ fsf_cfdc->command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
+ fsf_cfdc->option = FSF_CFDC_OPTION_FULL_ACCESS;
+ break;
+ case ZFCP_CFDC_CMND_RESTRICTED_ACCESS:
+ fsf_cfdc->command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
+ fsf_cfdc->option = FSF_CFDC_OPTION_RESTRICTED_ACCESS;
+ break;
+ case ZFCP_CFDC_CMND_UPLOAD:
+ fsf_cfdc->command = FSF_QTCB_UPLOAD_CONTROL_FILE;
+ fsf_cfdc->option = 0;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int zfcp_cfdc_sg_setup(int command, struct scatterlist *sg,
+ u8 __user *control_file)
+{
+ int retval;
+ retval = zfcp_sg_setup_table(sg, ZFCP_CFDC_PAGES);
+ if (retval)
+ return retval;
+
+ sg[ZFCP_CFDC_PAGES - 1].length = ZFCP_CFDC_MAX_SIZE % PAGE_SIZE;
+
+ if (command & ZFCP_CFDC_WITH_CONTROL_FILE &&
+ command & ZFCP_CFDC_DOWNLOAD) {
+ retval = zfcp_cfdc_copy_from_user(sg, control_file);
+ if (retval) {
+ zfcp_sg_free_table(sg, ZFCP_CFDC_PAGES);
+ return -EFAULT;
+ }
+ }
+
+ return 0;
+}
+
+static void zfcp_cfdc_req_to_sense(struct zfcp_cfdc_data *data,
+ struct zfcp_fsf_req *req)
+{
+ data->fsf_status = req->qtcb->header.fsf_status;
+ memcpy(&data->fsf_status_qual, &req->qtcb->header.fsf_status_qual,
+ sizeof(union fsf_status_qual));
+ memcpy(&data->payloads, &req->qtcb->bottom.support.els,
+ sizeof(req->qtcb->bottom.support.els));
+}
+
+static long zfcp_cfdc_dev_ioctl(struct file *file, unsigned int command,
+ unsigned long buffer)
+{
+ struct zfcp_cfdc_data *data;
+ struct zfcp_cfdc_data __user *data_user;
+ struct zfcp_adapter *adapter;
+ struct zfcp_fsf_req *req;
+ struct zfcp_fsf_cfdc *fsf_cfdc;
+ int retval;
+
+ if (command != ZFCP_CFDC_IOC)
+ return -ENOTTY;
+
+ data_user = (void __user *) buffer;
+ if (!data_user)
+ return -EINVAL;
+
+ fsf_cfdc = kmalloc(sizeof(struct zfcp_fsf_cfdc), GFP_KERNEL);
+ if (!fsf_cfdc)
+ return -ENOMEM;
+
+ data = kmalloc(sizeof(struct zfcp_cfdc_data), GFP_KERNEL);
+ if (!data) {
+ retval = -ENOMEM;
+ goto no_mem_sense;
+ }
+
+ retval = copy_from_user(data, data_user, sizeof(*data));
+ if (retval) {
+ retval = -EFAULT;
+ goto free_buffer;
+ }
+
+ if (data->signature != 0xCFDCACDF) {
+ retval = -EINVAL;
+ goto free_buffer;
+ }
+
+ retval = zfcp_cfdc_set_fsf(fsf_cfdc, data->command);
+
+ adapter = zfcp_cfdc_get_adapter(data->devno);
+ if (!adapter) {
+ retval = -ENXIO;
+ goto free_buffer;
+ }
+
+ retval = zfcp_cfdc_sg_setup(data->command, fsf_cfdc->sg,
+ data_user->control_file);
+ if (retval)
+ goto adapter_put;
+ req = zfcp_fsf_control_file(adapter, fsf_cfdc);
+ if (IS_ERR(req)) {
+ retval = PTR_ERR(req);
+ goto free_sg;
+ }
+
+ if (req->status & ZFCP_STATUS_FSFREQ_ERROR) {
+ retval = -ENXIO;
+ goto free_fsf;
+ }
+
+ zfcp_cfdc_req_to_sense(data, req);
+ retval = copy_to_user(data_user, data, sizeof(*data_user));
+ if (retval) {
+ retval = -EFAULT;
+ goto free_fsf;
+ }
+
+ if (data->command & ZFCP_CFDC_UPLOAD)
+ retval = zfcp_cfdc_copy_to_user(&data_user->control_file,
+ fsf_cfdc->sg);
+
+ free_fsf:
+ zfcp_fsf_req_free(req);
+ free_sg:
+ zfcp_sg_free_table(fsf_cfdc->sg, ZFCP_CFDC_PAGES);
+ adapter_put:
+ zfcp_adapter_put(adapter);
+ free_buffer:
+ kfree(data);
+ no_mem_sense:
+ kfree(fsf_cfdc);
+ return retval;
+}
+
+static const struct file_operations zfcp_cfdc_fops = {
+ .unlocked_ioctl = zfcp_cfdc_dev_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = zfcp_cfdc_dev_ioctl
+#endif
+};
+
+struct miscdevice zfcp_cfdc_misc = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "zfcp_cfdc",
+ .fops = &zfcp_cfdc_fops,
+};
#include <linux/init.h>
#include <linux/moduleparam.h>
-#include <linux/miscdevice.h>
#include <linux/major.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#define ZFCP_ERP_DISMISSED 0x4
#define ZFCP_ERP_NOMEM 0x5
-
-/******************** CFDC SPECIFIC STUFF *****************************/
-
-/* Firewall data channel sense data record */
-struct zfcp_cfdc_sense_data {
- u32 signature; /* Request signature */
- u32 devno; /* FCP adapter device number */
- u32 command; /* Command code */
- u32 fsf_status; /* FSF request status and status qualifier */
- u8 fsf_status_qual[FSF_STATUS_QUALIFIER_SIZE];
- u8 payloads[256]; /* Access conflicts list */
- u8 control_file[0]; /* Access control table */
-};
-
-#define ZFCP_CFDC_SIGNATURE 0xCFDCACDF
-
-#define ZFCP_CFDC_CMND_DOWNLOAD_NORMAL 0x00010001
-#define ZFCP_CFDC_CMND_DOWNLOAD_FORCE 0x00010101
-#define ZFCP_CFDC_CMND_FULL_ACCESS 0x00000201
-#define ZFCP_CFDC_CMND_RESTRICTED_ACCESS 0x00000401
-#define ZFCP_CFDC_CMND_UPLOAD 0x00010002
-
-#define ZFCP_CFDC_DOWNLOAD 0x00000001
-#define ZFCP_CFDC_UPLOAD 0x00000002
-#define ZFCP_CFDC_WITH_CONTROL_FILE 0x00010000
-
-#define ZFCP_CFDC_DEV_NAME "zfcp_cfdc"
-#define ZFCP_CFDC_DEV_MAJOR MISC_MAJOR
-#define ZFCP_CFDC_DEV_MINOR MISC_DYNAMIC_MINOR
-
-#define ZFCP_CFDC_MAX_CONTROL_FILE_SIZE 127 * 1024
-
/************************* STRUCTURE DEFINITIONS *****************************/
struct zfcp_fsf_req;
struct kmem_cache *gid_pn_cache;
};
-/**
- * struct zfcp_sg_list - struct describing a scatter-gather list
- * @sg: pointer to array of (struct scatterlist)
- * @count: number of elements in scatter-gather list
- */
-struct zfcp_sg_list {
- struct scatterlist *sg;
- unsigned int count;
-};
-
/* number of elements for various memory pools */
#define ZFCP_POOL_FSF_REQ_ERP_NR 1
#define ZFCP_POOL_FSF_REQ_SCSI_NR 1
extern int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *);
extern int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *,
struct fsf_qtcb_bottom_port *);
-extern int zfcp_fsf_control_file(struct zfcp_adapter *, struct zfcp_fsf_req **,
- u32, u32, struct zfcp_sg_list *);
+extern struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
+ struct zfcp_fsf_cfdc *fsf_cfdc);
extern void zfcp_fsf_start_timer(struct zfcp_fsf_req *, unsigned long);
extern void zfcp_erp_start_timer(struct zfcp_fsf_req *);
extern void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *);
extern void zfcp_erp_unit_access_changed(struct zfcp_unit *, u8, void *);
/******************************** AUX ****************************************/
+extern void zfcp_sg_free_table(struct scatterlist *sg, int count);
+extern int zfcp_sg_setup_table(struct scatterlist *sg, int count);
extern void zfcp_rec_dbf_event_thread(u8 id, struct zfcp_adapter *adapter);
extern void zfcp_rec_dbf_event_thread_lock(u8 id, struct zfcp_adapter *adapter);
extern void zfcp_rec_dbf_event_adapter(u8 id, void *ref, struct zfcp_adapter *);
struct scsi_cmnd *);
extern int zfcp_reqlist_isempty(struct zfcp_adapter *);
+extern struct miscdevice zfcp_cfdc_misc;
+
#endif /* ZFCP_EXT_H */
static int zfcp_fsf_status_read_handler(struct zfcp_fsf_req *);
static int zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *);
static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *);
-static int zfcp_fsf_control_file_handler(struct zfcp_fsf_req *);
+static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *);
static inline int zfcp_fsf_req_sbal_check(
unsigned long *, struct zfcp_qdio_queue *, int);
static inline int zfcp_use_one_sbal(
* -ENOMEM - Insufficient memory
* -EPERM - Cannot create FSF request or place it in QDIO queue
*/
-int
-zfcp_fsf_control_file(struct zfcp_adapter *adapter,
- struct zfcp_fsf_req **fsf_req_ptr,
- u32 fsf_command,
- u32 option,
- struct zfcp_sg_list *sg_list)
+struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
+ struct zfcp_fsf_cfdc *fsf_cfdc)
{
struct zfcp_fsf_req *fsf_req;
struct fsf_qtcb_bottom_support *bottom;
volatile struct qdio_buffer_element *sbale;
unsigned long lock_flags;
- int req_flags = 0;
int direction;
- int retval = 0;
-
- if (!(adapter->adapter_features & FSF_FEATURE_CFDC)) {
- ZFCP_LOG_INFO("cfdc not supported (adapter %s)\n",
- zfcp_get_busid_by_adapter(adapter));
- retval = -EOPNOTSUPP;
- goto out;
- }
+ int retval;
+ int bytes;
- switch (fsf_command) {
+ if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
+ return ERR_PTR(-EOPNOTSUPP);
+ switch (fsf_cfdc->command) {
case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
direction = SBAL_FLAGS0_TYPE_WRITE;
- if ((option != FSF_CFDC_OPTION_FULL_ACCESS) &&
- (option != FSF_CFDC_OPTION_RESTRICTED_ACCESS))
- req_flags = ZFCP_WAIT_FOR_SBAL;
break;
-
case FSF_QTCB_UPLOAD_CONTROL_FILE:
direction = SBAL_FLAGS0_TYPE_READ;
break;
-
default:
- ZFCP_LOG_INFO("Invalid FSF command code 0x%08x\n", fsf_command);
- retval = -EINVAL;
- goto out;
+ return ERR_PTR(-EINVAL);
}
- retval = zfcp_fsf_req_create(adapter, fsf_command, req_flags,
+ retval = zfcp_fsf_req_create(adapter, fsf_cfdc->command,
+ ZFCP_WAIT_FOR_SBAL,
NULL, &lock_flags, &fsf_req);
if (retval < 0) {
- ZFCP_LOG_INFO("error: Could not create FSF request for the "
- "adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
retval = -EPERM;
goto unlock_queue_lock;
}
bottom = &fsf_req->qtcb->bottom.support;
bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
- bottom->option = option;
-
- if (sg_list->count > 0) {
- int bytes;
-
- bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction,
- sg_list->sg, sg_list->count,
- ZFCP_MAX_SBALS_PER_REQ);
- if (bytes != ZFCP_CFDC_MAX_CONTROL_FILE_SIZE) {
- ZFCP_LOG_INFO(
- "error: Could not create sufficient number of "
- "SBALS for an FSF request to the adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
- retval = -ENOMEM;
- goto free_fsf_req;
- }
- } else
- sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
+ bottom->option = fsf_cfdc->option;
+
+ bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction,
+ fsf_cfdc->sg, ZFCP_CFDC_PAGES,
+ ZFCP_MAX_SBALS_PER_REQ);
+ if (bytes != ZFCP_CFDC_MAX_SIZE) {
+ retval = -ENOMEM;
+ goto free_fsf_req;
+ }
zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
retval = zfcp_fsf_req_send(fsf_req);
if (retval < 0) {
- ZFCP_LOG_INFO("initiation of cfdc up/download failed"
- "(adapter %s)\n",
- zfcp_get_busid_by_adapter(adapter));
retval = -EPERM;
goto free_fsf_req;
}
write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
- ZFCP_LOG_NORMAL("Control file %s FSF request has been sent to the "
- "adapter %s\n",
- fsf_command == FSF_QTCB_DOWNLOAD_CONTROL_FILE ?
- "download" : "upload",
- zfcp_get_busid_by_adapter(adapter));
-
wait_event(fsf_req->completion_wq,
fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
- *fsf_req_ptr = fsf_req;
- goto out;
+ return fsf_req;
free_fsf_req:
zfcp_fsf_req_free(fsf_req);
unlock_queue_lock:
write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
- out:
- return retval;
+ return ERR_PTR(retval);
}
-
-/*
- * function: zfcp_fsf_control_file_handler
- *
- * purpose: Handler of the control file upload/download FSF requests
- *
- * returns: 0 - FSF request successfuly processed
- * -EAGAIN - Operation has to be repeated because of a temporary problem
- * -EACCES - There is no permission to execute an operation
- * -EPERM - The control file is not in a right format
- * -EIO - There is a problem with the FCP adapter
- * -EINVAL - Invalid operation
- * -EFAULT - User space memory I/O operation fault
- */
-static int
-zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req)
+static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req)
{
- struct zfcp_adapter *adapter = fsf_req->adapter;
- struct fsf_qtcb_header *header = &fsf_req->qtcb->header;
- struct fsf_qtcb_bottom_support *bottom = &fsf_req->qtcb->bottom.support;
- int retval = 0;
-
- if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
- retval = -EINVAL;
- goto skip_fsfstatus;
- }
-
- switch (header->fsf_status) {
-
- case FSF_GOOD:
- ZFCP_LOG_NORMAL(
- "The FSF request has been successfully completed "
- "on the adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
- break;
-
- case FSF_OPERATION_PARTIALLY_SUCCESSFUL:
- if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) {
- switch (header->fsf_status_qual.word[0]) {
-
- case FSF_SQ_CFDC_HARDENED_ON_SE:
- ZFCP_LOG_NORMAL(
- "CFDC on the adapter %s has being "
- "hardened on primary and secondary SE\n",
- zfcp_get_busid_by_adapter(adapter));
- break;
-
- case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE:
- ZFCP_LOG_NORMAL(
- "CFDC of the adapter %s could not "
- "be saved on the SE\n",
- zfcp_get_busid_by_adapter(adapter));
- break;
-
- case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE2:
- ZFCP_LOG_NORMAL(
- "CFDC of the adapter %s could not "
- "be copied to the secondary SE\n",
- zfcp_get_busid_by_adapter(adapter));
- break;
-
- default:
- ZFCP_LOG_NORMAL(
- "CFDC could not be hardened "
- "on the adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
- }
- }
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- retval = -EAGAIN;
- break;
-
- case FSF_AUTHORIZATION_FAILURE:
- ZFCP_LOG_NORMAL(
- "Adapter %s does not accept privileged commands\n",
- zfcp_get_busid_by_adapter(adapter));
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- retval = -EACCES;
- break;
-
- case FSF_CFDC_ERROR_DETECTED:
- ZFCP_LOG_NORMAL(
- "Error at position %d in the CFDC, "
- "CFDC is discarded by the adapter %s\n",
- header->fsf_status_qual.word[0],
- zfcp_get_busid_by_adapter(adapter));
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- retval = -EPERM;
- break;
-
- case FSF_CONTROL_FILE_UPDATE_ERROR:
- ZFCP_LOG_NORMAL(
- "Adapter %s cannot harden the control file, "
- "file is discarded\n",
- zfcp_get_busid_by_adapter(adapter));
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- retval = -EIO;
- break;
-
- case FSF_CONTROL_FILE_TOO_LARGE:
- ZFCP_LOG_NORMAL(
- "Control file is too large, file is discarded "
- "by the adapter %s\n",
- zfcp_get_busid_by_adapter(adapter));
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- retval = -EIO;
- break;
-
- case FSF_ACCESS_CONFLICT_DETECTED:
- if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
- ZFCP_LOG_NORMAL(
- "CFDC has been discarded by the adapter %s, "
- "because activation would impact "
- "%d active connection(s)\n",
- zfcp_get_busid_by_adapter(adapter),
- header->fsf_status_qual.word[0]);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- retval = -EIO;
- break;
-
- case FSF_CONFLICTS_OVERRULED:
- if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
- ZFCP_LOG_NORMAL(
- "CFDC has been activated on the adapter %s, "
- "but activation has impacted "
- "%d active connection(s)\n",
- zfcp_get_busid_by_adapter(adapter),
- header->fsf_status_qual.word[0]);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- retval = -EIO;
- break;
-
- case FSF_UNKNOWN_OP_SUBTYPE:
- ZFCP_LOG_NORMAL("unknown operation subtype (adapter: %s, "
- "op_subtype=0x%x)\n",
- zfcp_get_busid_by_adapter(adapter),
- bottom->operation_subtype);
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- retval = -EINVAL;
- break;
-
- case FSF_INVALID_COMMAND_OPTION:
- ZFCP_LOG_NORMAL(
- "Invalid option 0x%x has been specified "
- "in QTCB bottom sent to the adapter %s\n",
- bottom->option,
- zfcp_get_busid_by_adapter(adapter));
+ if (fsf_req->qtcb->header.fsf_status != FSF_GOOD)
fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- retval = -EINVAL;
- break;
-
- default:
- ZFCP_LOG_NORMAL(
- "bug: An unknown/unexpected FSF status 0x%08x "
- "was presented on the adapter %s\n",
- header->fsf_status,
- zfcp_get_busid_by_adapter(adapter));
- fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
- retval = -EINVAL;
- break;
- }
-
-skip_fsfstatus:
- return retval;
}
static inline int
#ifndef FSF_H
#define FSF_H
+#include <linux/pfn.h>
+
#define FSF_QTCB_CURRENT_VERSION 0x00000001
/* FSF commands */
#define FSF_UNIT_ACCESS_EXCLUSIVE 0x02000000
#define FSF_UNIT_ACCESS_OUTBOUND_TRANSFER 0x10000000
+/* FSF interface for CFDC */
+#define ZFCP_CFDC_MAX_SIZE 127 * 1024
+#define ZFCP_CFDC_PAGES PFN_UP(ZFCP_CFDC_MAX_SIZE)
+
+struct zfcp_fsf_cfdc {
+ struct scatterlist sg[ZFCP_CFDC_PAGES];
+ u32 command;
+ u32 option;
+};
+
struct fsf_queue_designator {
u8 cssid;
u8 chpid;
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff