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| author | Seungwon Jeon <tgih.jun@samsung.com> | 2013-06-26 22:39:29 +0530 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2013-06-28 13:08:52 -0700 |
| commit | 6ccf44fe4cd7c45a33f571788890a299d8bca448 (patch) | |
| tree | 88a37909eb9729886a168de3ecf99be09de259ce /drivers/scsi/ufs/ufshcd.h | |
| parent | 261ea452037471b7cab6a3913d308acba54f7933 (diff) | |
| download | linux-6ccf44fe4cd7c45a33f571788890a299d8bca448.tar.bz2 | |
[SCSI] ufs: rework link start-up process
Link start-up requires long time with multiphase handshakes
between UFS host and device. This affects driver's probe time.
This patch let link start-up run asynchronously. Link start-up
will be executed at the end of prove separately.
Along with this change, the following is worked.
Defined completion time of uic command to avoid a permanent wait.
Added mutex to guarantee of uic command at a time.
Adapted some sequence of controller initialization after link statup
according to HCI standard.
Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>
Tested-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Santosh Y <santoshsy@gmail.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/ufs/ufshcd.h')
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index 4213600b89d6..49590ee07acc 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -51,6 +51,7 @@ #include <linux/bitops.h> #include <linux/pm_runtime.h> #include <linux/clk.h> +#include <linux/completion.h> #include <asm/irq.h> #include <asm/byteorder.h> @@ -75,6 +76,7 @@ * @argument3: UIC command argument 3 * @cmd_active: Indicate if UIC command is outstanding * @result: UIC command result + * @done: UIC command completion */ struct uic_command { u32 command; @@ -83,6 +85,7 @@ struct uic_command { u32 argument3; int cmd_active; int result; + struct completion done; }; /** @@ -136,11 +139,11 @@ struct ufshcd_lrb { * @ufs_version: UFS Version to which controller complies * @irq: Irq number of the controller * @active_uic_cmd: handle of active UIC command + * @uic_cmd_mutex: mutex for uic command * @ufshcd_tm_wait_queue: wait queue for task management * @tm_condition: condition variable for task management * @ufshcd_state: UFSHCD states * @intr_mask: Interrupt Mask Bits - * @uic_workq: Work queue for UIC completion handling * @feh_workq: Work queue for fatal controller error handling * @errors: HBA errors */ @@ -171,7 +174,9 @@ struct ufs_hba { u32 ufs_version; unsigned int irq; - struct uic_command active_uic_cmd; + struct uic_command *active_uic_cmd; + struct mutex uic_cmd_mutex; + wait_queue_head_t ufshcd_tm_wait_queue; unsigned long tm_condition; @@ -179,7 +184,6 @@ struct ufs_hba { u32 intr_mask; /* Work Queues */ - struct work_struct uic_workq; struct work_struct feh_workq; /* HBA Errors */ |