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Message-ID: <20221128195430.GD20677@asutoshd-linux1.qualcomm.com>
Date: Mon, 28 Nov 2022 11:54:30 -0800
From: Asutosh Das <quic_asutoshd@...cinc.com>
To: Manivannan Sadhasivam <mani@...nel.org>
CC: <quic_cang@...cinc.com>, <martin.petersen@...cle.com>,
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open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 07/16] ufs: core: mcq: Calculate queue depth
On Mon, Nov 28 2022 at 07:15 -0800, Manivannan Sadhasivam wrote:
>On Tue, Nov 22, 2022 at 08:10:20PM -0800, Asutosh Das wrote:
>> The ufs device defines the supported queuedepth by
>> bqueuedepth which has a max value of 256.
>> The HC defines MAC (Max Active Commands) that define
>> the max number of commands that in flight to the ufs
>> device.
>> Calculate and configure the nutrs based on both these
>> values.
>>
>> Co-developed-by: Can Guo <quic_cang@...cinc.com>
>> Signed-off-by: Can Guo <quic_cang@...cinc.com>
>> Signed-off-by: Asutosh Das <quic_asutoshd@...cinc.com>
>> ---
>> drivers/ufs/core/ufs-mcq.c | 32 ++++++++++++++++++++++++++++++++
>> drivers/ufs/core/ufshcd-priv.h | 9 +++++++++
>> drivers/ufs/core/ufshcd.c | 17 ++++++++++++++++-
>> drivers/ufs/host/ufs-qcom.c | 8 ++++++++
>> include/ufs/ufs.h | 2 ++
>> include/ufs/ufshcd.h | 2 ++
>> include/ufs/ufshci.h | 1 +
>> 7 files changed, 70 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/ufs/core/ufs-mcq.c b/drivers/ufs/core/ufs-mcq.c
>> index 4aaa6aa..e95f748 100644
>> --- a/drivers/ufs/core/ufs-mcq.c
>> +++ b/drivers/ufs/core/ufs-mcq.c
>> @@ -18,6 +18,8 @@
>> #define UFS_MCQ_NUM_DEV_CMD_QUEUES 1
>> #define UFS_MCQ_MIN_POLL_QUEUES 0
>>
>> +#define MAX_DEV_CMD_ENTRIES 2
>> +#define MCQ_CFG_MAC_MASK GENMASK(16, 8)
>> #define MCQ_QCFGPTR_MASK GENMASK(7, 0)
>> #define MCQ_QCFGPTR_UNIT 0x200
>> #define MCQ_SQATTR_OFFSET(c) \
>> @@ -88,6 +90,36 @@ static const struct ufshcd_res_info ufs_res_info[RES_MAX] = {
>> {.name = "mcq_vs",},
>> };
[...]
Hello Mani,
Thanks for taking a look.
>> + WARN_ON(!hba->dev_info.bqueuedepth);
>
>Instead of panic, you could just print and return an error.
>
I'd make it WARN_ON_ONCE();
>> + /*
>> + * max. value of bqueuedepth = 256, mac is host dependent.
>> + * It is mandatory for UFS device to define bQueueDepth if
>> + * shared queuing architecture is enabled.
>> + */
>> + return min_t(int, mac, hba->dev_info.bqueuedepth);
>> +}
>> +
>> static int ufshcd_mcq_config_resource(struct ufs_hba *hba)
>> {
>> struct platform_device *pdev = to_platform_device(hba->dev);
>> diff --git a/drivers/ufs/core/ufshcd-priv.h b/drivers/ufs/core/ufshcd-priv.h
>> index 9368ba2..9f40fa5 100644
>> --- a/drivers/ufs/core/ufshcd-priv.h
>> +++ b/drivers/ufs/core/ufshcd-priv.h
>> @@ -62,6 +62,7 @@ int ufshcd_query_flag(struct ufs_hba *hba, enum query_opcode opcode,
>> enum flag_idn idn, u8 index, bool *flag_res);
>> void ufshcd_auto_hibern8_update(struct ufs_hba *hba, u32 ahit);
>> int ufshcd_mcq_init(struct ufs_hba *hba);
>> +int ufshcd_mcq_decide_queue_depth(struct ufs_hba *hba);
>>
>> #define SD_ASCII_STD true
>> #define SD_RAW false
>> @@ -227,6 +228,14 @@ static inline void ufshcd_vops_config_scaling_param(struct ufs_hba *hba,
>> hba->vops->config_scaling_param(hba, p, data);
>> }
>>
>> +static inline int ufshcd_mcq_vops_get_hba_mac(struct ufs_hba *hba)
>
>Again, no inline please.
>
It spits out the following warning for all files that include this header, when
inline is removed:
warning: 'ufshcd_mcq_vops_get_hba_mac' defined but not used [-Wunused-function]
[...]
>> +#define MAX_SUPP_MAC 64
>
>Similar definitions are part of ufs-qcom.h.
>
>Thanks,
>Mani
>
>
>--
>மணிவண்ணன் சதாசிவம்
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