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Date:   Wed, 29 Aug 2018 20:27:58 +0000
From:   Javier Gonzalez <javier@...xlabs.com>
To:     Matias Bjørling <mb@...htnvm.io>
CC:     "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] lightnvm: move ppa transformations to core


> On 29 Aug 2018, at 16.30, Matias Bjørling <mb@...htnvm.io> wrote:
> 
> On 08/29/2018 04:12 PM, Javier González wrote:
>> Continuing the effort of moving 1.2 and 2.0 specific code to core, move
>> 64_to_32 and 32_to_64 ppa helpers from pblk to core.
>> Signed-off-by: Javier González <javier@...xlabs.com>
>> ---
>>  drivers/lightnvm/pblk.h  | 78 +++------------------------------------------
>>  include/linux/lightnvm.h | 83 ++++++++++++++++++++++++++++++++++++++++++++++++
>>  2 files changed, 87 insertions(+), 74 deletions(-)
>> diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h
>> index f95fe75fef6e..88ff529290f8 100644
>> --- a/drivers/lightnvm/pblk.h
>> +++ b/drivers/lightnvm/pblk.h
>> @@ -1086,86 +1086,16 @@ static inline u64 pblk_dev_ppa_to_line_addr(struct pblk *pblk,
>>    static inline struct ppa_addr pblk_ppa32_to_ppa64(struct pblk *pblk, u32 ppa32)
>>  {
>> -	struct ppa_addr ppa64;
>> +	struct nvm_tgt_dev *dev = pblk->dev;
>>  -	ppa64.ppa = 0;
>> -
>> -	if (ppa32 == -1) {
>> -		ppa64.ppa = ADDR_EMPTY;
>> -	} else if (ppa32 & (1U << 31)) {
>> -		ppa64.c.line = ppa32 & ((~0U) >> 1);
>> -		ppa64.c.is_cached = 1;
>> -	} else {
>> -		struct nvm_tgt_dev *dev = pblk->dev;
>> -		struct nvm_geo *geo = &dev->geo;
>> -
>> -		if (geo->version == NVM_OCSSD_SPEC_12) {
>> -			struct nvm_addrf_12 *ppaf =
>> -					(struct nvm_addrf_12 *)&pblk->addrf;
>> -
>> -			ppa64.g.ch = (ppa32 & ppaf->ch_mask) >>
>> -							ppaf->ch_offset;
>> -			ppa64.g.lun = (ppa32 & ppaf->lun_mask) >>
>> -							ppaf->lun_offset;
>> -			ppa64.g.blk = (ppa32 & ppaf->blk_mask) >>
>> -							ppaf->blk_offset;
>> -			ppa64.g.pg = (ppa32 & ppaf->pg_mask) >>
>> -							ppaf->pg_offset;
>> -			ppa64.g.pl = (ppa32 & ppaf->pln_mask) >>
>> -							ppaf->pln_offset;
>> -			ppa64.g.sec = (ppa32 & ppaf->sec_mask) >>
>> -							ppaf->sec_offset;
>> -		} else {
>> -			struct nvm_addrf *lbaf = &pblk->addrf;
>> -
>> -			ppa64.m.grp = (ppa32 & lbaf->ch_mask) >>
>> -							lbaf->ch_offset;
>> -			ppa64.m.pu = (ppa32 & lbaf->lun_mask) >>
>> -							lbaf->lun_offset;
>> -			ppa64.m.chk = (ppa32 & lbaf->chk_mask) >>
>> -							lbaf->chk_offset;
>> -			ppa64.m.sec = (ppa32 & lbaf->sec_mask) >>
>> -							lbaf->sec_offset;
>> -		}
>> -	}
>> -
>> -	return ppa64;
>> +	return ppa32_to_ppa64(dev->parent, &pblk->addrf, ppa32);
>>  }
>>    static inline u32 pblk_ppa64_to_ppa32(struct pblk *pblk, struct ppa_addr ppa64)
>>  {
>> -	u32 ppa32 = 0;
>> +	struct nvm_tgt_dev *dev = pblk->dev;
>>  -	if (ppa64.ppa == ADDR_EMPTY) {
>> -		ppa32 = ~0U;
>> -	} else if (ppa64.c.is_cached) {
>> -		ppa32 |= ppa64.c.line;
>> -		ppa32 |= 1U << 31;
>> -	} else {
>> -		struct nvm_tgt_dev *dev = pblk->dev;
>> -		struct nvm_geo *geo = &dev->geo;
>> -
>> -		if (geo->version == NVM_OCSSD_SPEC_12) {
>> -			struct nvm_addrf_12 *ppaf =
>> -					(struct nvm_addrf_12 *)&pblk->addrf;
>> -
>> -			ppa32 |= ppa64.g.ch << ppaf->ch_offset;
>> -			ppa32 |= ppa64.g.lun << ppaf->lun_offset;
>> -			ppa32 |= ppa64.g.blk << ppaf->blk_offset;
>> -			ppa32 |= ppa64.g.pg << ppaf->pg_offset;
>> -			ppa32 |= ppa64.g.pl << ppaf->pln_offset;
>> -			ppa32 |= ppa64.g.sec << ppaf->sec_offset;
>> -		} else {
>> -			struct nvm_addrf *lbaf = &pblk->addrf;
>> -
>> -			ppa32 |= ppa64.m.grp << lbaf->ch_offset;
>> -			ppa32 |= ppa64.m.pu << lbaf->lun_offset;
>> -			ppa32 |= ppa64.m.chk << lbaf->chk_offset;
>> -			ppa32 |= ppa64.m.sec << lbaf->sec_offset;
>> -		}
>> -	}
>> -
>> -	return ppa32;
>> +	return ppa64_to_ppa32(dev->parent, &pblk->addrf, ppa64);
>>  }
>>    static inline struct ppa_addr pblk_trans_map_get(struct pblk *pblk,
>> diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
>> index 77743a02ec0d..7107a8b84039 100644
>> --- a/include/linux/lightnvm.h
>> +++ b/include/linux/lightnvm.h
>> @@ -506,6 +506,89 @@ static inline u64 dev_to_chunk_addr(struct nvm_dev *dev, void *addrf,
>>  	return caddr;
>>  }
>>  +static inline struct ppa_addr ppa32_to_ppa64(struct nvm_dev *dev,
>> +					     void *addrf, u32 ppa32)
>> +{
>> +	struct ppa_addr ppa64;
>> +
>> +	ppa64.ppa = 0;
>> +
>> +	if (ppa32 == -1) {
>> +		ppa64.ppa = ADDR_EMPTY;
>> +	} else if (ppa32 & (1U << 31)) {
>> +		ppa64.c.line = ppa32 & ((~0U) >> 1);
>> +		ppa64.c.is_cached = 1;
>> +	} else {
>> +		struct nvm_geo *geo = &dev->geo;
>> +
>> +		if (geo->version == NVM_OCSSD_SPEC_12) {
>> +			struct nvm_addrf_12 *ppaf = addrf;
>> +
>> +			ppa64.g.ch = (ppa32 & ppaf->ch_mask) >>
>> +							ppaf->ch_offset;
>> +			ppa64.g.lun = (ppa32 & ppaf->lun_mask) >>
>> +							ppaf->lun_offset;
>> +			ppa64.g.blk = (ppa32 & ppaf->blk_mask) >>
>> +							ppaf->blk_offset;
>> +			ppa64.g.pg = (ppa32 & ppaf->pg_mask) >>
>> +							ppaf->pg_offset;
>> +			ppa64.g.pl = (ppa32 & ppaf->pln_mask) >>
>> +							ppaf->pln_offset;
>> +			ppa64.g.sec = (ppa32 & ppaf->sec_mask) >>
>> +							ppaf->sec_offset;
>> +		} else {
>> +			struct nvm_addrf *lbaf = addrf;
>> +
>> +			ppa64.m.grp = (ppa32 & lbaf->ch_mask) >>
>> +							lbaf->ch_offset;
>> +			ppa64.m.pu = (ppa32 & lbaf->lun_mask) >>
>> +							lbaf->lun_offset;
>> +			ppa64.m.chk = (ppa32 & lbaf->chk_mask) >>
>> +							lbaf->chk_offset;
>> +			ppa64.m.sec = (ppa32 & lbaf->sec_mask) >>
>> +							lbaf->sec_offset;
>> +		}
>> +	}
>> +
>> +	return ppa64;
>> +}
>> +
>> +static inline u32 ppa64_to_ppa32(struct nvm_dev *dev,
>> +				 void *addrf, struct ppa_addr ppa64)
>> +{
>> +	u32 ppa32 = 0;
>> +
>> +	if (ppa64.ppa == ADDR_EMPTY) {
>> +		ppa32 = ~0U;
>> +	} else if (ppa64.c.is_cached) {
>> +		ppa32 |= ppa64.c.line;
>> +		ppa32 |= 1U << 31;
>> +	} else {
>> +		struct nvm_geo *geo = &dev->geo;
>> +
>> +		if (geo->version == NVM_OCSSD_SPEC_12) {
>> +			struct nvm_addrf_12 *ppaf = addrf;
>> +
>> +			ppa32 |= ppa64.g.ch << ppaf->ch_offset;
>> +			ppa32 |= ppa64.g.lun << ppaf->lun_offset;
>> +			ppa32 |= ppa64.g.blk << ppaf->blk_offset;
>> +			ppa32 |= ppa64.g.pg << ppaf->pg_offset;
>> +			ppa32 |= ppa64.g.pl << ppaf->pln_offset;
>> +			ppa32 |= ppa64.g.sec << ppaf->sec_offset;
>> +		} else {
>> +			struct nvm_addrf *lbaf = addrf;
>> +
>> +			ppa32 |= ppa64.m.grp << lbaf->ch_offset;
>> +			ppa32 |= ppa64.m.pu << lbaf->lun_offset;
>> +			ppa32 |= ppa64.m.chk << lbaf->chk_offset;
>> +			ppa32 |= ppa64.m.sec << lbaf->sec_offset;
>> +		}
>> +	}
>> +
>> +	return ppa32;
>> +}
>> +
>> +
>>  typedef blk_qc_t (nvm_tgt_make_rq_fn)(struct request_queue *, struct bio *);
>>  typedef sector_t (nvm_tgt_capacity_fn)(void *);
>>  typedef void *(nvm_tgt_init_fn)(struct nvm_tgt_dev *, struct gendisk *,
> 
> Thanks. Applied for 4.20. I've updated the global ppa[32/64]_to_ppa[64/32] to prepend nvm_.

Cool, thanks. Should we do the same for the rest of the helpers dev_to_*?

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