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scsi: ufs: core: Defer adding host to SCSI if MCQ is supported 

If MCQ support is present, enabling it after MCQ support has been
configured would require reallocating tags and memory.  It would also free
up the already allocated memory in Single Doorbell Mode. So defer invoking
scsi_add_host() until MCQ is configured.

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>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Asutosh Das 2023-01-13 12:48:40 -08:00 committed by Martin K. Petersen
parent 305a357d35
commit 0cab4023ec
2 changed files with 21 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/ufs/core/ufshcd.c
View File

@ -95,6 +95,11 @@
/* UFSHC 4.0 compliant HC support this mode, refer param_set_mcq_mode() */
static bool use_mcq_mode = true;
static bool is_mcq_supported(struct ufs_hba *hba)
{
return hba->mcq_sup && use_mcq_mode;
}
static int param_set_mcq_mode(const char *val, const struct kernel_param *kp)
{
int ret;
@ -8292,6 +8297,7 @@ out:
static int ufshcd_device_init(struct ufs_hba *hba, bool init_dev_params)
{
int ret;
struct Scsi_Host *host = hba->host;
hba->ufshcd_state = UFSHCD_STATE_RESET;
@ -8326,6 +8332,14 @@ static int ufshcd_device_init(struct ufs_hba *hba, bool init_dev_params)
ret = ufshcd_device_params_init(hba);
if (ret)
return ret;
if (is_mcq_supported(hba) && !hba->scsi_host_added) {
ret = scsi_add_host(host, hba->dev);
if (ret) {
dev_err(hba->dev, "scsi_add_host failed\n");
return ret;
}
hba->scsi_host_added = true;
}
}
ufshcd_tune_unipro_params(hba);
@ -9964,11 +9978,13 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq)
hba->is_irq_enabled = true;
}
if (!is_mcq_supported(hba)) {
err = scsi_add_host(host, hba->dev);
if (err) {
dev_err(hba->dev, "scsi_add_host failed\n");
goto out_disable;
}
}
hba->tmf_tag_set = (struct blk_mq_tag_set) {
.nr_hw_queues = 1,

1
include/ufs/ufshcd.h
View File

@ -996,6 +996,7 @@ struct ufs_hba {
u32 luns_avail;
bool complete_put;
bool ext_iid_sup;
bool scsi_host_added;
bool mcq_sup;
};