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From: Will Deacon <will@kernel.org>
To: Christoph Hellwig <hch@lst.de>
Cc: Joerg Roedel <joro@8bytes.org>, Li Yang <leoyang.li@nxp.com>,
	Michael Ellerman <mpe@ellerman.id.au>,
	David Woodhouse <dwmw2@infradead.org>,
	Lu Baolu <baolu.lu@linux.intel.com>,
	linuxppc-dev@lists.ozlabs.org, linux-arm-msm@vger.kernel.org,
	dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org,
	iommu@lists.linux-foundation.org,
	linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org,
	virtualization@lists.linux-foundation.org,
	netdev@vger.kernel.org
Subject: Re: [PATCH 06/18] iommu/fsl_pamu: remove ->domain_window_enable
Date: Tue, 30 Mar 2021 13:40:09 +0100	[thread overview]
Message-ID: <20210330124009.GF5908@willie-the-truck> (raw)
In-Reply-To: <20210316153825.135976-7-hch@lst.de>

On Tue, Mar 16, 2021 at 04:38:12PM +0100, Christoph Hellwig wrote:
> The only thing that fsl_pamu_window_enable does for the current caller
> is to fill in the prot value in the only dma_window structure, and to
> propagate a few values from the iommu_domain_geometry struture into the
> dma_window.  Remove the dma_window entirely, hardcode the prot value and
> otherwise use the iommu_domain_geometry structure instead.
> 
> Remove the now unused ->domain_window_enable iommu method.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> Acked-by: Li Yang <leoyang.li@nxp.com>
> ---
>  drivers/iommu/fsl_pamu_domain.c     | 182 +++-------------------------
>  drivers/iommu/fsl_pamu_domain.h     |  17 ---
>  drivers/iommu/iommu.c               |  11 --
>  drivers/soc/fsl/qbman/qman_portal.c |   7 --
>  include/linux/iommu.h               |  17 ---
>  5 files changed, 14 insertions(+), 220 deletions(-)
> 
> diff --git a/drivers/iommu/fsl_pamu_domain.c b/drivers/iommu/fsl_pamu_domain.c
> index e6bdd38fc18409..fd2bc88b690465 100644
> --- a/drivers/iommu/fsl_pamu_domain.c
> +++ b/drivers/iommu/fsl_pamu_domain.c
> @@ -54,34 +54,18 @@ static int __init iommu_init_mempool(void)
>  	return 0;
>  }
>  
> -static phys_addr_t get_phys_addr(struct fsl_dma_domain *dma_domain, dma_addr_t iova)
> -{
> -	struct dma_window *win_ptr = &dma_domain->win_arr[0];
> -	struct iommu_domain_geometry *geom;
> -
> -	geom = &dma_domain->iommu_domain.geometry;
> -
> -	if (win_ptr->valid)
> -		return win_ptr->paddr + (iova & (win_ptr->size - 1));
> -
> -	return 0;
> -}
> -
>  /* Map the DMA window corresponding to the LIODN */
>  static int map_liodn(int liodn, struct fsl_dma_domain *dma_domain)
>  {
>  	int ret;
> -	struct dma_window *wnd = &dma_domain->win_arr[0];
> -	phys_addr_t wnd_addr = dma_domain->iommu_domain.geometry.aperture_start;
> +	struct iommu_domain_geometry *geom = &dma_domain->iommu_domain.geometry;
>  	unsigned long flags;
>  
>  	spin_lock_irqsave(&iommu_lock, flags);
> -	ret = pamu_config_ppaace(liodn, wnd_addr,
> -				 wnd->size,
> -				 ~(u32)0,
> -				 wnd->paddr >> PAMU_PAGE_SHIFT,
> -				 dma_domain->snoop_id, dma_domain->stash_id,
> -				 wnd->prot);
> +	ret = pamu_config_ppaace(liodn, geom->aperture_start,
> +				 geom->aperture_end - 1, ~(u32)0,

You're passing 'geom->aperture_end - 1' as the size here, but the old code
seemed to _add_ 1:

> -static int fsl_pamu_window_enable(struct iommu_domain *domain, u32 wnd_nr,
> -				  phys_addr_t paddr, u64 size, int prot)
> -{
> -	struct fsl_dma_domain *dma_domain = to_fsl_dma_domain(domain);
> -	struct dma_window *wnd;
> -	int pamu_prot = 0;
> -	int ret;
> -	unsigned long flags;
> -	u64 win_size;
> -
> -	if (prot & IOMMU_READ)
> -		pamu_prot |= PAACE_AP_PERMS_QUERY;
> -	if (prot & IOMMU_WRITE)
> -		pamu_prot |= PAACE_AP_PERMS_UPDATE;
> -
> -	spin_lock_irqsave(&dma_domain->domain_lock, flags);
> -	if (wnd_nr > 0) {
> -		pr_debug("Invalid window index\n");
> -		spin_unlock_irqrestore(&dma_domain->domain_lock, flags);
> -		return -EINVAL;
> -	}
> -
> -	win_size = (domain->geometry.aperture_end + 1) >> ilog2(1);

here ^^ when calculating the exclusive upper bound. In other words, I think
'1ULL << 36' used to get passed to pamu_config_ppaace(). Is that an
intentional change?

Will

  reply	other threads:[~2021-03-30 12:41 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-16 15:38 cleanup unused or almost unused IOMMU APIs and the FSL PAMU driver v2 Christoph Hellwig
2021-03-16 15:38 ` [PATCH 01/18] iommu: remove the unused domain_window_disable method Christoph Hellwig
2021-03-30 12:04   ` Will Deacon
2021-03-16 15:38 ` [PATCH 02/18] iommu/fsl_pamu: remove fsl_pamu_get_domain_attr Christoph Hellwig
2021-03-30 12:10   ` Will Deacon
2021-03-16 15:38 ` [PATCH 03/18] iommu/fsl_pamu: remove support for setting DOMAIN_ATTR_GEOMETRY Christoph Hellwig
2021-03-30 12:15   ` Will Deacon
2021-03-16 15:38 ` [PATCH 04/18] iommu/fsl_pamu: merge iommu_alloc_dma_domain into fsl_pamu_domain_alloc Christoph Hellwig
2021-03-30 12:17   ` Will Deacon
2021-03-16 15:38 ` [PATCH 05/18] iommu/fsl_pamu: remove support for multiple windows Christoph Hellwig
2021-03-30 12:22   ` Will Deacon
2021-04-01  9:29     ` Christoph Hellwig
2021-03-16 15:38 ` [PATCH 06/18] iommu/fsl_pamu: remove ->domain_window_enable Christoph Hellwig
2021-03-30 12:40   ` Will Deacon [this message]
2021-04-01  9:32     ` Christoph Hellwig
2021-03-16 15:38 ` [PATCH 07/18] iommu/fsl_pamu: replace DOMAIN_ATTR_FSL_PAMU_STASH with a direct call Christoph Hellwig
2021-03-30 12:44   ` Will Deacon
2021-03-16 15:38 ` [PATCH 08/18] iommu/fsl_pamu: merge pamu_set_liodn and map_liodn Christoph Hellwig
2021-03-30 12:46   ` Will Deacon
2021-04-01  9:34     ` Christoph Hellwig
2021-03-16 15:38 ` [PATCH 09/18] iommu/fsl_pamu: merge handle_attach_device into fsl_pamu_attach_device Christoph Hellwig
2021-03-30 12:48   ` Will Deacon
2021-03-16 15:38 ` [PATCH 10/18] iommu/fsl_pamu: enable the liodn when attaching a device Christoph Hellwig
2021-03-30 12:53   ` Will Deacon
2021-03-16 15:38 ` [PATCH 11/18] iommu/fsl_pamu: remove the snoop_id field Christoph Hellwig
2021-03-30 12:58   ` Will Deacon
2021-04-01  9:36     ` Christoph Hellwig
2021-03-16 15:38 ` [PATCH 12/18] iommu: remove DOMAIN_ATTR_PAGING Christoph Hellwig
2021-03-30 12:58   ` Will Deacon
2021-03-16 15:38 ` [PATCH 13/18] iommu: remove DOMAIN_ATTR_GEOMETRY Christoph Hellwig
2021-03-30 13:00   ` Will Deacon
2021-03-16 15:38 ` [PATCH 14/18] iommu: remove DOMAIN_ATTR_NESTING Christoph Hellwig
2021-03-30 13:04   ` Will Deacon
2021-03-16 15:38 ` [PATCH 15/18] iommu: remove iommu_set_cmd_line_dma_api and iommu_cmd_line_dma_api Christoph Hellwig
2021-03-30 13:05   ` Will Deacon
2021-03-16 15:38 ` [PATCH 16/18] iommu: remove DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE Christoph Hellwig
2021-03-30 13:11   ` Will Deacon
2021-03-30 13:19     ` Robin Murphy
2021-03-30 13:58       ` Will Deacon
2021-03-30 16:28         ` Robin Murphy
2021-03-31 11:49           ` Will Deacon
2021-03-31 13:09             ` Robin Murphy
2021-03-31 15:32               ` Will Deacon
2021-03-31 16:05                 ` Robin Murphy
2021-04-01  9:59                   ` Christoph Hellwig
2021-04-01 13:26                     ` Will Deacon
2021-03-31 16:07   ` Robin Murphy
2021-03-16 15:38 ` [PATCH 17/18] iommu: remove DOMAIN_ATTR_IO_PGTABLE_CFG Christoph Hellwig
2021-03-30 13:14   ` Will Deacon
2021-03-16 15:38 ` [PATCH 18/18] iommu: remove iommu_domain_{get,set}_attr Christoph Hellwig
2021-03-30 13:16   ` Will Deacon

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