diff options
Diffstat (limited to 'drivers/scsi/ses.c')
| -rw-r--r-- | drivers/scsi/ses.c | 923 |
1 files changed, 923 insertions, 0 deletions
diff --git a/drivers/scsi/ses.c b/drivers/scsi/ses.c new file mode 100644 index 0000000000..d7d0c35c58 --- /dev/null +++ b/drivers/scsi/ses.c @@ -0,0 +1,923 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * SCSI Enclosure Services + * + * Copyright (C) 2008 James Bottomley <James.Bottomley@HansenPartnership.com> + */ + +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/enclosure.h> +#include <asm/unaligned.h> + +#include <scsi/scsi.h> +#include <scsi/scsi_cmnd.h> +#include <scsi/scsi_dbg.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_driver.h> +#include <scsi/scsi_host.h> + +#include <scsi/scsi_transport_sas.h> + +struct ses_device { + unsigned char *page1; + unsigned char *page1_types; + unsigned char *page2; + unsigned char *page10; + short page1_len; + short page1_num_types; + short page2_len; + short page10_len; +}; + +struct ses_component { + u64 addr; +}; + +static bool ses_page2_supported(struct enclosure_device *edev) +{ + struct ses_device *ses_dev = edev->scratch; + + return (ses_dev->page2 != NULL); +} + +static int ses_probe(struct device *dev) +{ + struct scsi_device *sdev = to_scsi_device(dev); + int err = -ENODEV; + + if (sdev->type != TYPE_ENCLOSURE) + goto out; + + err = 0; + sdev_printk(KERN_NOTICE, sdev, "Attached Enclosure device\n"); + + out: + return err; +} + +#define SES_TIMEOUT (30 * HZ) +#define SES_RETRIES 3 + +static void init_device_slot_control(unsigned char *dest_desc, + struct enclosure_component *ecomp, + unsigned char *status) +{ + memcpy(dest_desc, status, 4); + dest_desc[0] = 0; + /* only clear byte 1 for ENCLOSURE_COMPONENT_DEVICE */ + if (ecomp->type == ENCLOSURE_COMPONENT_DEVICE) + dest_desc[1] = 0; + dest_desc[2] &= 0xde; + dest_desc[3] &= 0x3c; +} + + +static int ses_recv_diag(struct scsi_device *sdev, int page_code, + void *buf, int bufflen) +{ + int ret; + unsigned char cmd[] = { + RECEIVE_DIAGNOSTIC, + 1, /* Set PCV bit */ + page_code, + bufflen >> 8, + bufflen & 0xff, + 0 + }; + unsigned char recv_page_code; + unsigned int retries = SES_RETRIES; + struct scsi_sense_hdr sshdr; + const struct scsi_exec_args exec_args = { + .sshdr = &sshdr, + }; + + do { + ret = scsi_execute_cmd(sdev, cmd, REQ_OP_DRV_IN, buf, bufflen, + SES_TIMEOUT, 1, &exec_args); + } while (ret > 0 && --retries && scsi_sense_valid(&sshdr) && + (sshdr.sense_key == NOT_READY || + (sshdr.sense_key == UNIT_ATTENTION && sshdr.asc == 0x29))); + + if (unlikely(ret)) + return ret; + + recv_page_code = ((unsigned char *)buf)[0]; + + if (likely(recv_page_code == page_code)) + return ret; + + /* successful diagnostic but wrong page code. This happens to some + * USB devices, just print a message and pretend there was an error */ + + sdev_printk(KERN_ERR, sdev, + "Wrong diagnostic page; asked for %d got %u\n", + page_code, recv_page_code); + + return -EINVAL; +} + +static int ses_send_diag(struct scsi_device *sdev, int page_code, + void *buf, int bufflen) +{ + int result; + + unsigned char cmd[] = { + SEND_DIAGNOSTIC, + 0x10, /* Set PF bit */ + 0, + bufflen >> 8, + bufflen & 0xff, + 0 + }; + struct scsi_sense_hdr sshdr; + unsigned int retries = SES_RETRIES; + const struct scsi_exec_args exec_args = { + .sshdr = &sshdr, + }; + + do { + result = scsi_execute_cmd(sdev, cmd, REQ_OP_DRV_OUT, buf, + bufflen, SES_TIMEOUT, 1, &exec_args); + } while (result > 0 && --retries && scsi_sense_valid(&sshdr) && + (sshdr.sense_key == NOT_READY || + (sshdr.sense_key == UNIT_ATTENTION && sshdr.asc == 0x29))); + + if (result) + sdev_printk(KERN_ERR, sdev, "SEND DIAGNOSTIC result: %8x\n", + result); + return result; +} + +static int ses_set_page2_descriptor(struct enclosure_device *edev, + struct enclosure_component *ecomp, + unsigned char *desc) +{ + int i, j, count = 0, descriptor = ecomp->number; + struct scsi_device *sdev = to_scsi_device(edev->edev.parent); + struct ses_device *ses_dev = edev->scratch; + unsigned char *type_ptr = ses_dev->page1_types; + unsigned char *desc_ptr = ses_dev->page2 + 8; + + /* Clear everything */ + memset(desc_ptr, 0, ses_dev->page2_len - 8); + for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) { + for (j = 0; j < type_ptr[1]; j++) { + desc_ptr += 4; + if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE && + type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE) + continue; + if (count++ == descriptor) { + memcpy(desc_ptr, desc, 4); + /* set select */ + desc_ptr[0] |= 0x80; + /* clear reserved, just in case */ + desc_ptr[0] &= 0xf0; + } + } + } + + return ses_send_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len); +} + +static unsigned char *ses_get_page2_descriptor(struct enclosure_device *edev, + struct enclosure_component *ecomp) +{ + int i, j, count = 0, descriptor = ecomp->number; + struct scsi_device *sdev = to_scsi_device(edev->edev.parent); + struct ses_device *ses_dev = edev->scratch; + unsigned char *type_ptr = ses_dev->page1_types; + unsigned char *desc_ptr = ses_dev->page2 + 8; + + if (ses_recv_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len) < 0) + return NULL; + + for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) { + for (j = 0; j < type_ptr[1]; j++) { + desc_ptr += 4; + if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE && + type_ptr[0] != ENCLOSURE_COMPONENT_ARRAY_DEVICE) + continue; + if (count++ == descriptor) + return desc_ptr; + } + } + return NULL; +} + +/* For device slot and array device slot elements, byte 3 bit 6 + * is "fault sensed" while byte 3 bit 5 is "fault reqstd". As this + * code stands these bits are shifted 4 positions right so in + * sysfs they will appear as bits 2 and 1 respectively. Strange. */ +static void ses_get_fault(struct enclosure_device *edev, + struct enclosure_component *ecomp) +{ + unsigned char *desc; + + if (!ses_page2_supported(edev)) { + ecomp->fault = 0; + return; + } + desc = ses_get_page2_descriptor(edev, ecomp); + if (desc) + ecomp->fault = (desc[3] & 0x60) >> 4; +} + +static int ses_set_fault(struct enclosure_device *edev, + struct enclosure_component *ecomp, + enum enclosure_component_setting val) +{ + unsigned char desc[4]; + unsigned char *desc_ptr; + + if (!ses_page2_supported(edev)) + return -EINVAL; + + desc_ptr = ses_get_page2_descriptor(edev, ecomp); + + if (!desc_ptr) + return -EIO; + + init_device_slot_control(desc, ecomp, desc_ptr); + + switch (val) { + case ENCLOSURE_SETTING_DISABLED: + desc[3] &= 0xdf; + break; + case ENCLOSURE_SETTING_ENABLED: + desc[3] |= 0x20; + break; + default: + /* SES doesn't do the SGPIO blink settings */ + return -EINVAL; + } + + return ses_set_page2_descriptor(edev, ecomp, desc); +} + +static void ses_get_status(struct enclosure_device *edev, + struct enclosure_component *ecomp) +{ + unsigned char *desc; + + if (!ses_page2_supported(edev)) { + ecomp->status = 0; + return; + } + desc = ses_get_page2_descriptor(edev, ecomp); + if (desc) + ecomp->status = (desc[0] & 0x0f); +} + +static void ses_get_locate(struct enclosure_device *edev, + struct enclosure_component *ecomp) +{ + unsigned char *desc; + + if (!ses_page2_supported(edev)) { + ecomp->locate = 0; + return; + } + desc = ses_get_page2_descriptor(edev, ecomp); + if (desc) + ecomp->locate = (desc[2] & 0x02) ? 1 : 0; +} + +static int ses_set_locate(struct enclosure_device *edev, + struct enclosure_component *ecomp, + enum enclosure_component_setting val) +{ + unsigned char desc[4]; + unsigned char *desc_ptr; + + if (!ses_page2_supported(edev)) + return -EINVAL; + + desc_ptr = ses_get_page2_descriptor(edev, ecomp); + + if (!desc_ptr) + return -EIO; + + init_device_slot_control(desc, ecomp, desc_ptr); + + switch (val) { + case ENCLOSURE_SETTING_DISABLED: + desc[2] &= 0xfd; + break; + case ENCLOSURE_SETTING_ENABLED: + desc[2] |= 0x02; + break; + default: + /* SES doesn't do the SGPIO blink settings */ + return -EINVAL; + } + return ses_set_page2_descriptor(edev, ecomp, desc); +} + +static int ses_set_active(struct enclosure_device *edev, + struct enclosure_component *ecomp, + enum enclosure_component_setting val) +{ + unsigned char desc[4]; + unsigned char *desc_ptr; + + if (!ses_page2_supported(edev)) + return -EINVAL; + + desc_ptr = ses_get_page2_descriptor(edev, ecomp); + + if (!desc_ptr) + return -EIO; + + init_device_slot_control(desc, ecomp, desc_ptr); + + switch (val) { + case ENCLOSURE_SETTING_DISABLED: + desc[2] &= 0x7f; + ecomp->active = 0; + break; + case ENCLOSURE_SETTING_ENABLED: + desc[2] |= 0x80; + ecomp->active = 1; + break; + default: + /* SES doesn't do the SGPIO blink settings */ + return -EINVAL; + } + return ses_set_page2_descriptor(edev, ecomp, desc); +} + +static int ses_show_id(struct enclosure_device *edev, char *buf) +{ + struct ses_device *ses_dev = edev->scratch; + unsigned long long id = get_unaligned_be64(ses_dev->page1+8+4); + + return sprintf(buf, "%#llx\n", id); +} + +static void ses_get_power_status(struct enclosure_device *edev, + struct enclosure_component *ecomp) +{ + unsigned char *desc; + + if (!ses_page2_supported(edev)) { + ecomp->power_status = 0; + return; + } + + desc = ses_get_page2_descriptor(edev, ecomp); + if (desc) + ecomp->power_status = (desc[3] & 0x10) ? 0 : 1; +} + +static int ses_set_power_status(struct enclosure_device *edev, + struct enclosure_component *ecomp, + int val) +{ + unsigned char desc[4]; + unsigned char *desc_ptr; + + if (!ses_page2_supported(edev)) + return -EINVAL; + + desc_ptr = ses_get_page2_descriptor(edev, ecomp); + + if (!desc_ptr) + return -EIO; + + init_device_slot_control(desc, ecomp, desc_ptr); + + switch (val) { + /* power = 1 is device_off = 0 and vice versa */ + case 0: + desc[3] |= 0x10; + break; + case 1: + desc[3] &= 0xef; + break; + default: + return -EINVAL; + } + ecomp->power_status = val; + return ses_set_page2_descriptor(edev, ecomp, desc); +} + +static struct enclosure_component_callbacks ses_enclosure_callbacks = { + .get_fault = ses_get_fault, + .set_fault = ses_set_fault, + .get_status = ses_get_status, + .get_locate = ses_get_locate, + .set_locate = ses_set_locate, + .get_power_status = ses_get_power_status, + .set_power_status = ses_set_power_status, + .set_active = ses_set_active, + .show_id = ses_show_id, +}; + +struct ses_host_edev { + struct Scsi_Host *shost; + struct enclosure_device *edev; +}; + +#if 0 +int ses_match_host(struct enclosure_device *edev, void *data) +{ + struct ses_host_edev *sed = data; + struct scsi_device *sdev; + + if (!scsi_is_sdev_device(edev->edev.parent)) + return 0; + + sdev = to_scsi_device(edev->edev.parent); + + if (sdev->host != sed->shost) + return 0; + + sed->edev = edev; + return 1; +} +#endif /* 0 */ + +static int ses_process_descriptor(struct enclosure_component *ecomp, + unsigned char *desc, int max_desc_len) +{ + int eip = desc[0] & 0x10; + int invalid = desc[0] & 0x80; + enum scsi_protocol proto = desc[0] & 0x0f; + u64 addr = 0; + int slot = -1; + struct ses_component *scomp = ecomp->scratch; + unsigned char *d; + + if (invalid) + return 0; + + switch (proto) { + case SCSI_PROTOCOL_FCP: + if (eip) { + if (max_desc_len <= 7) + return 1; + d = desc + 4; + slot = d[3]; + } + break; + case SCSI_PROTOCOL_SAS: + + if (eip) { + if (max_desc_len <= 27) + return 1; + d = desc + 4; + slot = d[3]; + d = desc + 8; + } else { + if (max_desc_len <= 23) + return 1; + d = desc + 4; + } + + + /* only take the phy0 addr */ + addr = (u64)d[12] << 56 | + (u64)d[13] << 48 | + (u64)d[14] << 40 | + (u64)d[15] << 32 | + (u64)d[16] << 24 | + (u64)d[17] << 16 | + (u64)d[18] << 8 | + (u64)d[19]; + break; + default: + /* FIXME: Need to add more protocols than just SAS */ + break; + } + ecomp->slot = slot; + scomp->addr = addr; + + return 0; +} + +struct efd { + u64 addr; + struct device *dev; +}; + +static int ses_enclosure_find_by_addr(struct enclosure_device *edev, + void *data) +{ + struct efd *efd = data; + int i; + struct ses_component *scomp; + + for (i = 0; i < edev->components; i++) { + scomp = edev->component[i].scratch; + if (scomp->addr != efd->addr) + continue; + + if (enclosure_add_device(edev, i, efd->dev) == 0) + kobject_uevent(&efd->dev->kobj, KOBJ_CHANGE); + return 1; + } + return 0; +} + +#define INIT_ALLOC_SIZE 32 + +static void ses_enclosure_data_process(struct enclosure_device *edev, + struct scsi_device *sdev, + int create) +{ + u32 result; + unsigned char *buf = NULL, *type_ptr, *desc_ptr, *addl_desc_ptr = NULL; + int i, j, page7_len, len, components; + struct ses_device *ses_dev = edev->scratch; + int types = ses_dev->page1_num_types; + unsigned char *hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL); + + if (!hdr_buf) + goto simple_populate; + + /* re-read page 10 */ + if (ses_dev->page10) + ses_recv_diag(sdev, 10, ses_dev->page10, ses_dev->page10_len); + /* Page 7 for the descriptors is optional */ + result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE); + if (result) + goto simple_populate; + + page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; + /* add 1 for trailing '\0' we'll use */ + buf = kzalloc(len + 1, GFP_KERNEL); + if (!buf) + goto simple_populate; + result = ses_recv_diag(sdev, 7, buf, len); + if (result) { + simple_populate: + kfree(buf); + buf = NULL; + desc_ptr = NULL; + len = 0; + page7_len = 0; + } else { + desc_ptr = buf + 8; + len = (desc_ptr[2] << 8) + desc_ptr[3]; + /* skip past overall descriptor */ + desc_ptr += len + 4; + } + if (ses_dev->page10 && ses_dev->page10_len > 9) + addl_desc_ptr = ses_dev->page10 + 8; + type_ptr = ses_dev->page1_types; + components = 0; + for (i = 0; i < types; i++, type_ptr += 4) { + for (j = 0; j < type_ptr[1]; j++) { + char *name = NULL; + struct enclosure_component *ecomp; + int max_desc_len; + + if (desc_ptr) { + if (desc_ptr + 3 >= buf + page7_len) { + desc_ptr = NULL; + } else { + len = (desc_ptr[2] << 8) + desc_ptr[3]; + desc_ptr += 4; + if (desc_ptr + len > buf + page7_len) + desc_ptr = NULL; + else { + /* Add trailing zero - pushes into + * reserved space */ + desc_ptr[len] = '\0'; + name = desc_ptr; + } + } + } + if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || + type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) { + + if (create) + ecomp = enclosure_component_alloc( + edev, + components++, + type_ptr[0], + name); + else if (components < edev->components) + ecomp = &edev->component[components++]; + else + ecomp = ERR_PTR(-EINVAL); + + if (!IS_ERR(ecomp)) { + if (addl_desc_ptr) { + max_desc_len = ses_dev->page10_len - + (addl_desc_ptr - ses_dev->page10); + if (ses_process_descriptor(ecomp, + addl_desc_ptr, + max_desc_len)) + addl_desc_ptr = NULL; + } + if (create) + enclosure_component_register( + ecomp); + } + } + if (desc_ptr) + desc_ptr += len; + + if (addl_desc_ptr && + /* only find additional descriptions for specific devices */ + (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || + type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE || + type_ptr[0] == ENCLOSURE_COMPONENT_SAS_EXPANDER || + /* these elements are optional */ + type_ptr[0] == ENCLOSURE_COMPONENT_SCSI_TARGET_PORT || + type_ptr[0] == ENCLOSURE_COMPONENT_SCSI_INITIATOR_PORT || + type_ptr[0] == ENCLOSURE_COMPONENT_CONTROLLER_ELECTRONICS)) { + addl_desc_ptr += addl_desc_ptr[1] + 2; + if (addl_desc_ptr + 1 >= ses_dev->page10 + ses_dev->page10_len) + addl_desc_ptr = NULL; + } + } + } + kfree(buf); + kfree(hdr_buf); +} + +static void ses_match_to_enclosure(struct enclosure_device *edev, + struct scsi_device *sdev, + int refresh) +{ + struct scsi_device *edev_sdev = to_scsi_device(edev->edev.parent); + struct efd efd = { + .addr = 0, + }; + + if (refresh) + ses_enclosure_data_process(edev, edev_sdev, 0); + + if (scsi_is_sas_rphy(sdev->sdev_target->dev.parent)) + efd.addr = sas_get_address(sdev); + + if (efd.addr) { + efd.dev = &sdev->sdev_gendev; + + enclosure_for_each_device(ses_enclosure_find_by_addr, &efd); + } +} + +static int ses_intf_add(struct device *cdev) +{ + struct scsi_device *sdev = to_scsi_device(cdev->parent); + struct scsi_device *tmp_sdev; + unsigned char *buf = NULL, *hdr_buf, *type_ptr, page; + struct ses_device *ses_dev; + u32 result; + int i, types, len, components = 0; + int err = -ENOMEM; + int num_enclosures; + struct enclosure_device *edev; + struct ses_component *scomp = NULL; + + if (!scsi_device_enclosure(sdev)) { + /* not an enclosure, but might be in one */ + struct enclosure_device *prev = NULL; + + while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) { + ses_match_to_enclosure(edev, sdev, 1); + prev = edev; + } + return -ENODEV; + } + + /* TYPE_ENCLOSURE prints a message in probe */ + if (sdev->type != TYPE_ENCLOSURE) + sdev_printk(KERN_NOTICE, sdev, "Embedded Enclosure Device\n"); + + ses_dev = kzalloc(sizeof(*ses_dev), GFP_KERNEL); + hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL); + if (!hdr_buf || !ses_dev) + goto err_init_free; + + page = 1; + result = ses_recv_diag(sdev, page, hdr_buf, INIT_ALLOC_SIZE); + if (result) + goto recv_failed; + + len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; + buf = kzalloc(len, GFP_KERNEL); + if (!buf) + goto err_free; + + result = ses_recv_diag(sdev, page, buf, len); + if (result) + goto recv_failed; + + types = 0; + + /* we always have one main enclosure and the rest are referred + * to as secondary subenclosures */ + num_enclosures = buf[1] + 1; + + /* begin at the enclosure descriptor */ + type_ptr = buf + 8; + /* skip all the enclosure descriptors */ + for (i = 0; i < num_enclosures && type_ptr < buf + len; i++) { + types += type_ptr[2]; + type_ptr += type_ptr[3] + 4; + } + + ses_dev->page1_types = type_ptr; + ses_dev->page1_num_types = types; + + for (i = 0; i < types && type_ptr < buf + len; i++, type_ptr += 4) { + if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || + type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) + components += type_ptr[1]; + } + + ses_dev->page1 = buf; + ses_dev->page1_len = len; + buf = NULL; + + page = 2; + result = ses_recv_diag(sdev, page, hdr_buf, INIT_ALLOC_SIZE); + if (result) + goto page2_not_supported; + + len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; + buf = kzalloc(len, GFP_KERNEL); + if (!buf) + goto err_free; + + /* make sure getting page 2 actually works */ + result = ses_recv_diag(sdev, 2, buf, len); + if (result) + goto recv_failed; + ses_dev->page2 = buf; + ses_dev->page2_len = len; + buf = NULL; + + /* The additional information page --- allows us + * to match up the devices */ + page = 10; + result = ses_recv_diag(sdev, page, hdr_buf, INIT_ALLOC_SIZE); + if (!result) { + + len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; + buf = kzalloc(len, GFP_KERNEL); + if (!buf) + goto err_free; + + result = ses_recv_diag(sdev, page, buf, len); + if (result) + goto recv_failed; + ses_dev->page10 = buf; + ses_dev->page10_len = len; + buf = NULL; + } +page2_not_supported: + if (components > 0) { + scomp = kcalloc(components, sizeof(struct ses_component), GFP_KERNEL); + if (!scomp) + goto err_free; + } + + edev = enclosure_register(cdev->parent, dev_name(&sdev->sdev_gendev), + components, &ses_enclosure_callbacks); + if (IS_ERR(edev)) { + err = PTR_ERR(edev); + goto err_free; + } + + kfree(hdr_buf); + + edev->scratch = ses_dev; + for (i = 0; i < components; i++) + edev->component[i].scratch = scomp + i; + + ses_enclosure_data_process(edev, sdev, 1); + + /* see if there are any devices matching before + * we found the enclosure */ + shost_for_each_device(tmp_sdev, sdev->host) { + if (tmp_sdev->lun != 0 || scsi_device_enclosure(tmp_sdev)) + continue; + ses_match_to_enclosure(edev, tmp_sdev, 0); + } + + return 0; + + recv_failed: + sdev_printk(KERN_ERR, sdev, "Failed to get diagnostic page 0x%x\n", + page); + err = -ENODEV; + err_free: + kfree(buf); + kfree(scomp); + kfree(ses_dev->page10); + kfree(ses_dev->page2); + kfree(ses_dev->page1); + err_init_free: + kfree(ses_dev); + kfree(hdr_buf); + sdev_printk(KERN_ERR, sdev, "Failed to bind enclosure %d\n", err); + return err; +} + +static int ses_remove(struct device *dev) +{ + return 0; +} + +static void ses_intf_remove_component(struct scsi_device *sdev) +{ + struct enclosure_device *edev, *prev = NULL; + + while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) { + prev = edev; + if (!enclosure_remove_device(edev, &sdev->sdev_gendev)) + break; + } + if (edev) + put_device(&edev->edev); +} + +static void ses_intf_remove_enclosure(struct scsi_device *sdev) +{ + struct enclosure_device *edev; + struct ses_device *ses_dev; + + /* exact match to this enclosure */ + edev = enclosure_find(&sdev->sdev_gendev, NULL); + if (!edev) + return; + + ses_dev = edev->scratch; + edev->scratch = NULL; + + kfree(ses_dev->page10); + kfree(ses_dev->page1); + kfree(ses_dev->page2); + kfree(ses_dev); + + if (edev->components) + kfree(edev->component[0].scratch); + + put_device(&edev->edev); + enclosure_unregister(edev); +} + +static void ses_intf_remove(struct device *cdev) +{ + struct scsi_device *sdev = to_scsi_device(cdev->parent); + + if (!scsi_device_enclosure(sdev)) + ses_intf_remove_component(sdev); + else + ses_intf_remove_enclosure(sdev); +} + +static struct class_interface ses_interface = { + .add_dev = ses_intf_add, + .remove_dev = ses_intf_remove, +}; + +static struct scsi_driver ses_template = { + .gendrv = { + .name = "ses", + .owner = THIS_MODULE, + .probe = ses_probe, + .remove = ses_remove, + }, +}; + +static int __init ses_init(void) +{ + int err; + + err = scsi_register_interface(&ses_interface); + if (err) + return err; + + err = scsi_register_driver(&ses_template.gendrv); + if (err) + goto out_unreg; + + return 0; + + out_unreg: + scsi_unregister_interface(&ses_interface); + return err; +} + +static void __exit ses_exit(void) +{ + scsi_unregister_driver(&ses_template.gendrv); + scsi_unregister_interface(&ses_interface); +} + +module_init(ses_init); +module_exit(ses_exit); + +MODULE_ALIAS_SCSI_DEVICE(TYPE_ENCLOSURE); + +MODULE_AUTHOR("James Bottomley"); +MODULE_DESCRIPTION("SCSI Enclosure Services (ses) driver"); +MODULE_LICENSE("GPL v2"); |