diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ufs/core/ufs_bsg.c | 93 | ||||
| -rw-r--r-- | drivers/ufs/core/ufshcd.c | 103 |
2 files changed, 186 insertions, 10 deletions
diff --git a/drivers/ufs/core/ufs_bsg.c b/drivers/ufs/core/ufs_bsg.c index 850a0d798f63..a8e58faa7da2 100644 --- a/drivers/ufs/core/ufs_bsg.c +++ b/drivers/ufs/core/ufs_bsg.c @@ -6,6 +6,7 @@ */ #include <linux/bsg-lib.h> +#include <linux/dma-mapping.h> #include <scsi/scsi.h> #include <scsi/scsi_host.h> #include "ufs_bsg.h" @@ -68,6 +69,72 @@ out: return 0; } +static int ufs_bsg_exec_advanced_rpmb_req(struct ufs_hba *hba, struct bsg_job *job) +{ + struct ufs_rpmb_request *rpmb_request = job->request; + struct ufs_rpmb_reply *rpmb_reply = job->reply; + struct bsg_buffer *payload = NULL; + enum dma_data_direction dir; + struct scatterlist *sg_list; + int rpmb_req_type; + int sg_cnt; + int ret; + int data_len; + + if (hba->ufs_version < ufshci_version(4, 0) || !hba->dev_info.b_advanced_rpmb_en || + !(hba->capabilities & MASK_EHSLUTRD_SUPPORTED)) + return -EINVAL; + + if (rpmb_request->ehs_req.length != 2 || rpmb_request->ehs_req.ehs_type != 1) + return -EINVAL; + + rpmb_req_type = be16_to_cpu(rpmb_request->ehs_req.meta.req_resp_type); + + switch (rpmb_req_type) { + case UFS_RPMB_WRITE_KEY: + case UFS_RPMB_READ_CNT: + case UFS_RPMB_PURGE_ENABLE: + dir = DMA_NONE; + break; + case UFS_RPMB_WRITE: + case UFS_RPMB_SEC_CONF_WRITE: + dir = DMA_TO_DEVICE; + break; + case UFS_RPMB_READ: + case UFS_RPMB_SEC_CONF_READ: + case UFS_RPMB_PURGE_STATUS_READ: + dir = DMA_FROM_DEVICE; + break; + default: + return -EINVAL; + } + + if (dir != DMA_NONE) { + payload = &job->request_payload; + if (!payload || !payload->payload_len || !payload->sg_cnt) + return -EINVAL; + + sg_cnt = dma_map_sg(hba->host->dma_dev, payload->sg_list, payload->sg_cnt, dir); + if (unlikely(!sg_cnt)) + return -ENOMEM; + sg_list = payload->sg_list; + data_len = payload->payload_len; + } + + ret = ufshcd_advanced_rpmb_req_handler(hba, &rpmb_request->bsg_request.upiu_req, + &rpmb_reply->bsg_reply.upiu_rsp, &rpmb_request->ehs_req, + &rpmb_reply->ehs_rsp, sg_cnt, sg_list, dir); + + if (dir != DMA_NONE) { + dma_unmap_sg(hba->host->dma_dev, payload->sg_list, payload->sg_cnt, dir); + + if (!ret) + rpmb_reply->bsg_reply.reply_payload_rcv_len = data_len; + } + + return ret; +} + static int ufs_bsg_request(struct bsg_job *job) { struct ufs_bsg_request *bsg_request = job->request; @@ -75,10 +142,11 @@ static int ufs_bsg_request(struct bsg_job *job) struct ufs_hba *hba = shost_priv(dev_to_shost(job->dev->parent)); struct uic_command uc = {}; int msgcode; - uint8_t *desc_buff = NULL; + uint8_t *buff = NULL; int desc_len = 0; enum query_opcode desc_op = UPIU_QUERY_OPCODE_NOP; int ret; + bool rpmb = false; bsg_reply->reply_payload_rcv_len = 0; @@ -88,8 +156,7 @@ static int ufs_bsg_request(struct bsg_job *job) switch (msgcode) { case UPIU_TRANSACTION_QUERY_REQ: desc_op = bsg_request->upiu_req.qr.opcode; - ret = ufs_bsg_alloc_desc_buffer(hba, job, &desc_buff, - &desc_len, desc_op); + ret = ufs_bsg_alloc_desc_buffer(hba, job, &buff, &desc_len, desc_op); if (ret) goto out; fallthrough; @@ -97,25 +164,31 @@ static int ufs_bsg_request(struct bsg_job *job) case UPIU_TRANSACTION_TASK_REQ: ret = ufshcd_exec_raw_upiu_cmd(hba, &bsg_request->upiu_req, &bsg_reply->upiu_rsp, msgcode, - desc_buff, &desc_len, desc_op); + buff, &desc_len, desc_op); if (ret) dev_err(hba->dev, "exe raw upiu: error code %d\n", ret); - else if (desc_op == UPIU_QUERY_OPCODE_READ_DESC && desc_len) + else if (desc_op == UPIU_QUERY_OPCODE_READ_DESC && desc_len) { bsg_reply->reply_payload_rcv_len = sg_copy_from_buffer(job->request_payload.sg_list, job->request_payload.sg_cnt, - desc_buff, desc_len); + buff, desc_len); + } break; case UPIU_TRANSACTION_UIC_CMD: memcpy(&uc, &bsg_request->upiu_req.uc, UIC_CMD_SIZE); ret = ufshcd_send_uic_cmd(hba, &uc); if (ret) - dev_err(hba->dev, - "send uic cmd: error code %d\n", ret); + dev_err(hba->dev, "send uic cmd: error code %d\n", ret); memcpy(&bsg_reply->upiu_rsp.uc, &uc, UIC_CMD_SIZE); break; + case UPIU_TRANSACTION_ARPMB_CMD: + rpmb = true; + ret = ufs_bsg_exec_advanced_rpmb_req(hba, job); + if (ret) + dev_err(hba->dev, "ARPMB OP failed: error code %d\n", ret); + break; default: ret = -ENOTSUPP; dev_err(hba->dev, "unsupported msgcode 0x%x\n", msgcode); @@ -125,9 +198,9 @@ static int ufs_bsg_request(struct bsg_job *job) out: ufshcd_rpm_put_sync(hba); - kfree(desc_buff); + kfree(buff); bsg_reply->result = ret; - job->reply_len = sizeof(struct ufs_bsg_reply); + job->reply_len = !rpmb ? sizeof(struct ufs_bsg_reply) : sizeof(struct ufs_rpmb_reply); /* complete the job here only if no error */ if (ret == 0) bsg_job_done(job, ret, bsg_reply->reply_payload_rcv_len); diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index bacc94f87ee2..1ecee6507e88 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -56,6 +56,9 @@ /* Query request timeout */ #define QUERY_REQ_TIMEOUT 1500 /* 1.5 seconds */ +/* Advanced RPMB request timeout */ +#define ADVANCED_RPMB_REQ_TIMEOUT 3000 /* 3 seconds */ + /* Task management command timeout */ #define TM_CMD_TIMEOUT 100 /* msecs */ @@ -2954,6 +2957,12 @@ ufshcd_dev_cmd_completion(struct ufs_hba *hba, struct ufshcd_lrb *lrbp) dev_err(hba->dev, "%s: Reject UPIU not fully implemented\n", __func__); break; + case UPIU_TRANSACTION_RESPONSE: + if (hba->dev_cmd.type != DEV_CMD_TYPE_RPMB) { + err = -EINVAL; + dev_err(hba->dev, "%s: unexpected response %x\n", __func__, resp); + } + break; default: err = -EINVAL; dev_err(hba->dev, "%s: Invalid device management cmd response: %x\n", @@ -7007,6 +7016,100 @@ int ufshcd_exec_raw_upiu_cmd(struct ufs_hba *hba, } /** + * ufshcd_advanced_rpmb_req_handler - handle advanced RPMB request + * @hba: per adapter instance + * @req_upiu: upiu request + * @rsp_upiu: upiu reply + * @req_ehs: EHS field which contains Advanced RPMB Request Message + * @rsp_ehs: EHS field which returns Advanced RPMB Response Message + * @sg_cnt: The number of sg lists actually used + * @sg_list: Pointer to SG list when DATA IN/OUT UPIU is required in ARPMB operation + * @dir: DMA direction + * + * Returns zero on success, non-zero on failure + */ +int ufshcd_advanced_rpmb_req_handler(struct ufs_hba *hba, struct utp_upiu_req *req_upiu, + struct utp_upiu_req *rsp_upiu, struct ufs_ehs *req_ehs, + struct ufs_ehs *rsp_ehs, int sg_cnt, struct scatterlist *sg_list, + enum dma_data_direction dir) +{ + DECLARE_COMPLETION_ONSTACK(wait); + const u32 tag = hba->reserved_slot; + struct ufshcd_lrb *lrbp; + int err = 0; + int result; + u8 upiu_flags; + u8 *ehs_data; + u16 ehs_len; + + /* Protects use of hba->reserved_slot. */ + ufshcd_hold(hba, false); + mutex_lock(&hba->dev_cmd.lock); + down_read(&hba->clk_scaling_lock); + + lrbp = &hba->lrb[tag]; + WARN_ON(lrbp->cmd); + lrbp->cmd = NULL; + lrbp->task_tag = tag; + lrbp->lun = UFS_UPIU_RPMB_WLUN; + + lrbp->intr_cmd = true; + ufshcd_prepare_lrbp_crypto(NULL, lrbp); + hba->dev_cmd.type = DEV_CMD_TYPE_RPMB; + + /* Advanced RPMB starts from UFS 4.0, so its command type is UTP_CMD_TYPE_UFS_STORAGE */ + lrbp->command_type = UTP_CMD_TYPE_UFS_STORAGE; + + ufshcd_prepare_req_desc_hdr(lrbp, &upiu_flags, dir, 2); + + /* update the task tag and LUN in the request upiu */ + req_upiu->header.dword_0 |= cpu_to_be32(upiu_flags << 16 | UFS_UPIU_RPMB_WLUN << 8 | tag); + + /* copy the UPIU(contains CDB) request as it is */ + memcpy(lrbp->ucd_req_ptr, req_upiu, sizeof(*lrbp->ucd_req_ptr)); + /* Copy EHS, starting with byte32, immediately after the CDB package */ + memcpy(lrbp->ucd_req_ptr + 1, req_ehs, sizeof(*req_ehs)); + + if (dir != DMA_NONE && sg_list) + ufshcd_sgl_to_prdt(hba, lrbp, sg_cnt, sg_list); + + memset(lrbp->ucd_rsp_ptr, 0, sizeof(struct utp_upiu_rsp)); + + hba->dev_cmd.complete = &wait; + + ufshcd_send_command(hba, tag); + + err = ufshcd_wait_for_dev_cmd(hba, lrbp, ADVANCED_RPMB_REQ_TIMEOUT); + + if (!err) { + /* Just copy the upiu response as it is */ + memcpy(rsp_upiu, lrbp->ucd_rsp_ptr, sizeof(*rsp_upiu)); + /* Get the response UPIU result */ + result = ufshcd_get_rsp_upiu_result(lrbp->ucd_rsp_ptr); + + ehs_len = be32_to_cpu(lrbp->ucd_rsp_ptr->header.dword_2) >> 24; + /* + * Since the bLength in EHS indicates the total size of the EHS Header and EHS Data + * in 32 Byte units, the value of the bLength Request/Response for Advanced RPMB + * Message is 02h + */ + if (ehs_len == 2 && rsp_ehs) { + /* + * ucd_rsp_ptr points to a buffer with a length of 512 bytes + * (ALIGNED_UPIU_SIZE = 512), and the EHS data just starts from byte32 + */ + ehs_data = (u8 *)lrbp->ucd_rsp_ptr + EHS_OFFSET_IN_RESPONSE; + memcpy(rsp_ehs, ehs_data, ehs_len * 32); + } + } + + up_read(&hba->clk_scaling_lock); + mutex_unlock(&hba->dev_cmd.lock); + ufshcd_release(hba); + return err ? : result; +} + +/** * ufshcd_eh_device_reset_handler() - Reset a single logical unit. * @cmd: SCSI command pointer * |