From: Vinod Koul <vkoul@kernel.org>
To: leonid.ravich@dell.com
Cc: dmaengine@vger.kernel.org, lravich@gmail.com,
Dan Williams <dan.j.williams@intel.com>,
Dave Jiang <dave.jiang@intel.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Alexios Zavras <alexios.zavras@intel.com>,
"Alexander.Barabash@dell.com" <Alexander.Barabash@dell.com>,
Thomas Gleixner <tglx@linutronix.de>,
Kate Stewart <kstewart@linuxfoundation.org>,
Jilayne Lovejoy <opensource@jilayne.com>,
Logan Gunthorpe <logang@deltatee.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 1/2] dmaengine: ioat: fixing chunk sizing macros dependency
Date: Wed, 15 Apr 2020 21:22:24 +0530 [thread overview]
Message-ID: <20200415155224.GS72691@vkoul-mobl> (raw)
In-Reply-To: <20200402163356.9029-1-leonid.ravich@dell.com>
On 02-04-20, 19:33, leonid.ravich@dell.com wrote:
> From: Leonid Ravich <Leonid.Ravich@emc.com>
>
> prepare for changing alloc size.
This does not tell what the change is doing. A patch should describe the
change... pls explain the change is size here
>
> Acked-by: Dave Jiang <dave.jiang@intel.com>
> Signed-off-by: Leonid Ravich <Leonid.Ravich@emc.com>
> ---
> drivers/dma/ioat/dma.c | 14 ++++++++------
> drivers/dma/ioat/dma.h | 10 ++++++----
> drivers/dma/ioat/init.c | 2 +-
> 3 files changed, 15 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/dma/ioat/dma.c b/drivers/dma/ioat/dma.c
> index 18c011e..1e0e6c1 100644
> --- a/drivers/dma/ioat/dma.c
> +++ b/drivers/dma/ioat/dma.c
> @@ -332,8 +332,8 @@ static dma_cookie_t ioat_tx_submit_unlock(struct dma_async_tx_descriptor *tx)
> u8 *pos;
> off_t offs;
>
> - chunk = idx / IOAT_DESCS_PER_2M;
> - idx &= (IOAT_DESCS_PER_2M - 1);
> + chunk = idx / IOAT_DESCS_PER_CHUNK;
> + idx &= (IOAT_DESCS_PER_CHUNK - 1);
> offs = idx * IOAT_DESC_SZ;
> pos = (u8 *)ioat_chan->descs[chunk].virt + offs;
> phys = ioat_chan->descs[chunk].hw + offs;
> @@ -370,7 +370,8 @@ struct ioat_ring_ent **
> if (!ring)
> return NULL;
>
> - ioat_chan->desc_chunks = chunks = (total_descs * IOAT_DESC_SZ) / SZ_2M;
> + chunks = (total_descs * IOAT_DESC_SZ) / IOAT_CHUNK_SIZE;
> + ioat_chan->desc_chunks = chunks;
>
> for (i = 0; i < chunks; i++) {
> struct ioat_descs *descs = &ioat_chan->descs[i];
> @@ -382,8 +383,9 @@ struct ioat_ring_ent **
>
> for (idx = 0; idx < i; idx++) {
> descs = &ioat_chan->descs[idx];
> - dma_free_coherent(to_dev(ioat_chan), SZ_2M,
> - descs->virt, descs->hw);
> + dma_free_coherent(to_dev(ioat_chan),
> + IOAT_CHUNK_SIZE,
> + descs->virt, descs->hw);
> descs->virt = NULL;
> descs->hw = 0;
> }
> @@ -404,7 +406,7 @@ struct ioat_ring_ent **
>
> for (idx = 0; idx < ioat_chan->desc_chunks; idx++) {
> dma_free_coherent(to_dev(ioat_chan),
> - SZ_2M,
> + IOAT_CHUNK_SIZE,
> ioat_chan->descs[idx].virt,
> ioat_chan->descs[idx].hw);
> ioat_chan->descs[idx].virt = NULL;
> diff --git a/drivers/dma/ioat/dma.h b/drivers/dma/ioat/dma.h
> index b8e8e0b..5216c6b 100644
> --- a/drivers/dma/ioat/dma.h
> +++ b/drivers/dma/ioat/dma.h
> @@ -81,6 +81,11 @@ struct ioatdma_device {
> u32 msixpba;
> };
>
> +#define IOAT_MAX_ORDER 16
> +#define IOAT_MAX_DESCS (1 << IOAT_MAX_ORDER)
> +#define IOAT_CHUNK_SIZE (SZ_2M)
> +#define IOAT_DESCS_PER_CHUNK (IOAT_CHUNK_SIZE / IOAT_DESC_SZ)
> +
> struct ioat_descs {
> void *virt;
> dma_addr_t hw;
> @@ -128,7 +133,7 @@ struct ioatdma_chan {
> u16 produce;
> struct ioat_ring_ent **ring;
> spinlock_t prep_lock;
> - struct ioat_descs descs[2];
> + struct ioat_descs descs[IOAT_MAX_DESCS / IOAT_DESCS_PER_CHUNK];
> int desc_chunks;
> int intr_coalesce;
> int prev_intr_coalesce;
> @@ -301,9 +306,6 @@ static inline bool is_ioat_bug(unsigned long err)
> return !!err;
> }
>
> -#define IOAT_MAX_ORDER 16
> -#define IOAT_MAX_DESCS 65536
> -#define IOAT_DESCS_PER_2M 32768
>
> static inline u32 ioat_ring_size(struct ioatdma_chan *ioat_chan)
> {
> diff --git a/drivers/dma/ioat/init.c b/drivers/dma/ioat/init.c
> index 60e9afb..58d1356 100644
> --- a/drivers/dma/ioat/init.c
> +++ b/drivers/dma/ioat/init.c
> @@ -651,7 +651,7 @@ static void ioat_free_chan_resources(struct dma_chan *c)
> }
>
> for (i = 0; i < ioat_chan->desc_chunks; i++) {
> - dma_free_coherent(to_dev(ioat_chan), SZ_2M,
> + dma_free_coherent(to_dev(ioat_chan), IOAT_CHUNK_SIZE,
> ioat_chan->descs[i].virt,
> ioat_chan->descs[i].hw);
> ioat_chan->descs[i].virt = NULL;
> --
> 1.9.3
--
~Vinod
next prev parent reply other threads:[~2020-04-15 15:52 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-02 9:27 [PATCH 1/2] dmaengine: ioat: fixing chunk sizing macros dependency leonid.ravich
2020-04-02 9:27 ` [PATCH 2/2] dmaengine: ioat: Decreasing allocation chunk size 2M -> 512K leonid.ravich
2020-04-02 15:06 ` Dave Jiang
2020-04-02 16:33 ` [PATCH v2 1/2] dmaengine: ioat: fixing chunk sizing macros dependency leonid.ravich
2020-04-02 16:33 ` [PATCH v2 2/2] dmaengine: ioat: Decreasing allocation chunk size 2M -> 512K leonid.ravich
2020-04-15 15:53 ` Vinod Koul
2020-04-16 17:06 ` [PATCH v3 1/2] dmaengine: ioat: fixing chunk sizing macros dependency leonid.ravich
2020-04-16 17:06 ` [PATCH v3 2/2] dmaengine: ioat: Decreasing allocation chunk size 2M->512K leonid.ravich
2020-04-22 19:25 ` [PATCH v2 1/3] dmaengine: ioat: removing duplicate code from timeout handler leonid.ravich
2020-04-22 19:25 ` [PATCH v2 2/3] dmaengine: ioat: remove unnesesery double complition timer modification leonid.ravich
2020-04-22 19:25 ` [PATCH v2 3/3] dmaengine: ioat: adding missed issue_pending to timeout handler leonid.ravich
2020-04-22 19:58 ` Dave Jiang
2020-04-22 21:09 ` [PATCH v3 1/3] dmaengine: ioat: removing duplicate code from " leonid.ravich
2020-04-22 21:09 ` [PATCH v3 2/3] dmaengine: ioat: remove unnesesery double complition timer modification leonid.ravich
2020-04-22 21:09 ` [PATCH v3 3/3] dmaengine: ioat: adding missed issue_pending to timeout handler leonid.ravich
2020-04-23 7:21 ` [PATCH v3 1/3] dmaengine: ioat: removing duplicate code from " Vinod Koul
2020-04-17 11:58 ` [PATCH v3 1/2] dmaengine: ioat: fixing chunk sizing macros dependency Vinod Koul
2020-04-02 16:42 ` [PATCH v2 " Dave Jiang
2020-04-02 16:46 ` Ravich, Leonid
2020-04-02 16:49 ` Dave Jiang
2020-04-15 15:52 ` Vinod Koul [this message]
2020-04-02 15:04 ` [PATCH " Dave Jiang
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