linux-kernel - RE: [RFC v2 3/4] crypto: hisilicon/qm - Export mailbox functions for common use

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Date:   Mon, 5 Jul 2021 10:23:12 +0000
From:   Shameerali Kolothum Thodi <shameerali.kolothum.thodi@...wei.com>
To:     Max Gurtovoy <mgurtovoy@...dia.com>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>
CC:     "alex.williamson@...hat.com" <alex.williamson@...hat.com>,
        "jgg@...dia.com" <jgg@...dia.com>, Linuxarm <linuxarm@...wei.com>,
        liulongfang <liulongfang@...wei.com>,
        "Zengtao (B)" <prime.zeng@...ilicon.com>,
        yuzenghui <yuzenghui@...wei.com>,
        "Jonathan Cameron" <jonathan.cameron@...wei.com>,
        "Wangzhou (B)" <wangzhou1@...ilicon.com>
Subject: RE: [RFC v2 3/4] crypto: hisilicon/qm - Export mailbox functions for
 common use



> -----Original Message-----
> From: Max Gurtovoy [mailto:mgurtovoy@...dia.com]
> Sent: 04 July 2021 10:34
> To: Shameerali Kolothum Thodi <shameerali.kolothum.thodi@...wei.com>;
> kvm@...r.kernel.org; linux-kernel@...r.kernel.org;
> linux-crypto@...r.kernel.org
> Cc: alex.williamson@...hat.com; jgg@...dia.com; Linuxarm
> <linuxarm@...wei.com>; liulongfang <liulongfang@...wei.com>; Zengtao (B)
> <prime.zeng@...ilicon.com>; yuzenghui <yuzenghui@...wei.com>; Jonathan
> Cameron <jonathan.cameron@...wei.com>; Wangzhou (B)
> <wangzhou1@...ilicon.com>
> Subject: Re: [RFC v2 3/4] crypto: hisilicon/qm - Export mailbox functions for
> common use
> 
> 
> On 7/2/2021 12:58 PM, Shameer Kolothum wrote:
> > From: Longfang Liu <liulongfang@...wei.com>
> >
> > Export QM mailbox functions so that they can be used from HiSilicon
> > ACC vfio live migration driver in follow-up patch.
> >
> > Signed-off-by: Longfang Liu <liulongfang@...wei.com>
> > Signed-off-by: Shameer Kolothum
> <shameerali.kolothum.thodi@...wei.com>
> > ---
> >   drivers/crypto/hisilicon/qm.c | 8 +++++---
> >   drivers/crypto/hisilicon/qm.h | 4 ++++
> >   2 files changed, 9 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/crypto/hisilicon/qm.c
> > b/drivers/crypto/hisilicon/qm.c index ce439a0c66c9..87fc0199705e
> > 100644
> > --- a/drivers/crypto/hisilicon/qm.c
> > +++ b/drivers/crypto/hisilicon/qm.c
> > @@ -492,7 +492,7 @@ static bool qm_qp_avail_state(struct hisi_qm *qm,
> struct hisi_qp *qp,
> >   }
> >
> >   /* return 0 mailbox ready, -ETIMEDOUT hardware timeout */ -static
> > int qm_wait_mb_ready(struct hisi_qm *qm)
> > +int qm_wait_mb_ready(struct hisi_qm *qm)
> >   {
> >   	u32 val;
> >
> > @@ -500,6 +500,7 @@ static int qm_wait_mb_ready(struct hisi_qm *qm)
> >   					  val, !((val >> QM_MB_BUSY_SHIFT) &
> >   					  0x1), POLL_PERIOD, POLL_TIMEOUT);
> >   }
> > +EXPORT_SYMBOL_GPL(qm_wait_mb_ready);
> >
> >   /* 128 bit should be written to hardware at one time to trigger a mailbox
> */
> >   static void qm_mb_write(struct hisi_qm *qm, const void *src) @@
> > -523,8 +524,8 @@ static void qm_mb_write(struct hisi_qm *qm, const void
> *src)
> >   		     : "memory");
> >   }
> >
> > -static int qm_mb(struct hisi_qm *qm, u8 cmd, dma_addr_t dma_addr, u16
> queue,
> > -		 bool op)
> > +int qm_mb(struct hisi_qm *qm, u8 cmd, dma_addr_t dma_addr, u16 queue,
> > +	  bool op)
> >   {
> >   	struct qm_mailbox mailbox;
> >   	int ret = 0;
> > @@ -563,6 +564,7 @@ static int qm_mb(struct hisi_qm *qm, u8 cmd,
> dma_addr_t dma_addr, u16 queue,
> >   		atomic64_inc(&qm->debug.dfx.mb_err_cnt);
> >   	return ret;
> >   }
> > +EXPORT_SYMBOL_GPL(qm_mb);
> >
> >   static void qm_db_v1(struct hisi_qm *qm, u16 qn, u8 cmd, u16 index, u8
> priority)
> >   {
> > diff --git a/drivers/crypto/hisilicon/qm.h
> > b/drivers/crypto/hisilicon/qm.h index acefdf8b3a50..18b010d5452d
> > 100644
> > --- a/drivers/crypto/hisilicon/qm.h
> > +++ b/drivers/crypto/hisilicon/qm.h
> > @@ -396,6 +396,10 @@ pci_ers_result_t hisi_qm_dev_slot_reset(struct
> pci_dev *pdev);
> >   void hisi_qm_reset_prepare(struct pci_dev *pdev);
> >   void hisi_qm_reset_done(struct pci_dev *pdev);
> >
> > +int qm_wait_mb_ready(struct hisi_qm *qm); int qm_mb(struct hisi_qm
> > +*qm, u8 cmd, dma_addr_t dma_addr, u16 queue,
> > +	  bool op);
> > +
> 
> maybe you can put it under include/linux/.. ?

Ok. I suppose we could do that.

Thanks,
Shameer

> 
> 
> >   struct hisi_acc_sgl_pool;
> >   struct hisi_acc_hw_sgl *hisi_acc_sg_buf_map_to_hw_sgl(struct device
> *dev,
> >   	struct scatterlist *sgl, struct hisi_acc_sgl_pool *pool,