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| author | Asutosh Das <quic_asutoshd@quicinc.com> | 2023-01-13 12:48:50 -0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2023-01-13 21:03:37 -0500 |
| commit | f87b2c41822aad09aadac31b8ba22c0c0e639eee (patch) | |
| tree | 0acba69679b69ffb8b3497519f15bc00fed6ce2b /drivers/ufs/host | |
| parent | c30d8d010b5efd1d526ae94c9fbbfc0f74cec9fe (diff) | |
| download | linux-stable-f87b2c41822aad09aadac31b8ba22c0c0e639eee.tar.gz linux-stable-f87b2c41822aad09aadac31b8ba22c0c0e639eee.tar.bz2 linux-stable-f87b2c41822aad09aadac31b8ba22c0c0e639eee.zip | |
scsi: ufs: mcq: Add completion support of a CQE
Add support for completing requests from Completion Queue. Some host
controllers support vendor specific registers that provide a bitmap of all
CQs which have at least one completed CQE. Add this support. The MCQ
specification doesn't provide the Task Tag or its equivalent in the
Completion Queue Entry. So use an indirect method to find the Task Tag
from the Completion Queue Entry.
Co-developed-by: Can Guo <quic_cang@quicinc.com>
Signed-off-by: Can Guo <quic_cang@quicinc.com>
Signed-off-by: Asutosh Das <quic_asutoshd@quicinc.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/ufs/host')
| -rw-r--r-- | drivers/ufs/host/ufs-qcom.c | 14 | ||||
| -rw-r--r-- | drivers/ufs/host/ufs-qcom.h | 4 |
2 files changed, 18 insertions, 0 deletions
diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index e828b876e793..19b181447685 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -1525,6 +1525,19 @@ static int ufs_qcom_get_hba_mac(struct ufs_hba *hba) return MAX_SUPP_MAC; } +static int ufs_qcom_get_outstanding_cqs(struct ufs_hba *hba, + unsigned long *ocqs) +{ + struct ufshcd_res_info *mcq_vs_res = &hba->res[RES_MCQ_VS]; + + if (!mcq_vs_res->base) + return -EINVAL; + + *ocqs = readl(mcq_vs_res->base + UFS_MEM_CQIS_VS); + + return 0; +} + /* * struct ufs_hba_qcom_vops - UFS QCOM specific variant operations * @@ -1552,6 +1565,7 @@ static const struct ufs_hba_variant_ops ufs_hba_qcom_vops = { .mcq_config_resource = ufs_qcom_mcq_config_resource, .get_hba_mac = ufs_qcom_get_hba_mac, .op_runtime_config = ufs_qcom_op_runtime_config, + .get_outstanding_cqs = ufs_qcom_get_outstanding_cqs, }; /** diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h index 164e18b6b1fb..8050e214f722 100644 --- a/drivers/ufs/host/ufs-qcom.h +++ b/drivers/ufs/host/ufs-qcom.h @@ -71,6 +71,10 @@ enum { UFS_UFS_DBG_RD_EDTL_RAM = 0x1900, }; +enum { + UFS_MEM_CQIS_VS = 0x8, +}; + #define UFS_CNTLR_2_x_x_VEN_REGS_OFFSET(x) (0x000 + x) #define UFS_CNTLR_3_x_x_VEN_REGS_OFFSET(x) (0x400 + x) |