diff options
Diffstat (limited to 'drivers/cxl/core/mbox.c')
| -rw-r--r-- | drivers/cxl/core/mbox.c | 60 |
1 files changed, 43 insertions, 17 deletions
diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c index 4df4f614f490..36270dcfb42e 100644 --- a/drivers/cxl/core/mbox.c +++ b/drivers/cxl/core/mbox.c @@ -1125,20 +1125,7 @@ int cxl_dev_state_identify(struct cxl_memdev_state *mds) } EXPORT_SYMBOL_NS_GPL(cxl_dev_state_identify, CXL); -/** - * cxl_mem_sanitize() - Send a sanitization command to the device. - * @mds: The device data for the operation - * @cmd: The specific sanitization command opcode - * - * Return: 0 if the command was executed successfully, regardless of - * whether or not the actual security operation is done in the background, - * such as for the Sanitize case. - * Error return values can be the result of the mailbox command, -EINVAL - * when security requirements are not met or invalid contexts. - * - * See CXL 3.0 @8.2.9.8.5.1 Sanitize and @8.2.9.8.5.2 Secure Erase. - */ -int cxl_mem_sanitize(struct cxl_memdev_state *mds, u16 cmd) +static int __cxl_mem_sanitize(struct cxl_memdev_state *mds, u16 cmd) { int rc; u32 sec_out = 0; @@ -1183,7 +1170,45 @@ int cxl_mem_sanitize(struct cxl_memdev_state *mds, u16 cmd) return 0; } -EXPORT_SYMBOL_NS_GPL(cxl_mem_sanitize, CXL); + + +/** + * cxl_mem_sanitize() - Send a sanitization command to the device. + * @cxlmd: The device for the operation + * @cmd: The specific sanitization command opcode + * + * Return: 0 if the command was executed successfully, regardless of + * whether or not the actual security operation is done in the background, + * such as for the Sanitize case. + * Error return values can be the result of the mailbox command, -EINVAL + * when security requirements are not met or invalid contexts, or -EBUSY + * if the sanitize operation is already in flight. + * + * See CXL 3.0 @8.2.9.8.5.1 Sanitize and @8.2.9.8.5.2 Secure Erase. + */ +int cxl_mem_sanitize(struct cxl_memdev *cxlmd, u16 cmd) +{ + struct cxl_memdev_state *mds = to_cxl_memdev_state(cxlmd->cxlds); + struct cxl_port *endpoint; + int rc; + + /* synchronize with cxl_mem_probe() and decoder write operations */ + device_lock(&cxlmd->dev); + endpoint = cxlmd->endpoint; + down_read(&cxl_region_rwsem); + /* + * Require an endpoint to be safe otherwise the driver can not + * be sure that the device is unmapped. + */ + if (endpoint && cxl_num_decoders_committed(endpoint) == 0) + rc = __cxl_mem_sanitize(mds, cmd); + else + rc = -EBUSY; + up_read(&cxl_region_rwsem); + device_unlock(&cxlmd->dev); + + return rc; +} static int add_dpa_res(struct device *dev, struct resource *parent, struct resource *res, resource_size_t start, @@ -1224,8 +1249,7 @@ int cxl_mem_create_range_info(struct cxl_memdev_state *mds) return 0; } - cxlds->dpa_res = - (struct resource)DEFINE_RES_MEM(0, mds->total_bytes); + cxlds->dpa_res = DEFINE_RES_MEM(0, mds->total_bytes); if (mds->partition_align_bytes == 0) { rc = add_dpa_res(dev, &cxlds->dpa_res, &cxlds->ram_res, 0, @@ -1377,6 +1401,8 @@ struct cxl_memdev_state *cxl_memdev_state_create(struct device *dev) mutex_init(&mds->mbox_mutex); mutex_init(&mds->event.log_lock); mds->cxlds.dev = dev; + mds->cxlds.reg_map.host = dev; + mds->cxlds.reg_map.resource = CXL_RESOURCE_NONE; mds->cxlds.type = CXL_DEVTYPE_CLASSMEM; return mds; |