Re: IOVA allocation dependency between firmware buffer and remaining buffers

2020-09-28 Thread Marek Szyprowski
Hi Robin, On 24.09.2020 13:06, Robin Murphy wrote: > On 2020-09-24 11:47, Marek Szyprowski wrote: >> On 24.09.2020 12:40, Robin Murphy wrote: >>> On 2020-09-24 11:16, Thierry Reding wrote: On Thu, Sep 24, 2020 at 10:46:46AM +0200, Marek Szyprowski wrote: > On 24.09.2020 10:28, Joerg

Re: IOVA allocation dependency between firmware buffer and remaining buffers

2020-09-24 Thread Thierry Reding
On Thu, Sep 24, 2020 at 12:41:29PM +0200, Marek Szyprowski wrote: > Hi Thierry, > > On 24.09.2020 12:16, Thierry Reding wrote: > > On Thu, Sep 24, 2020 at 10:46:46AM +0200, Marek Szyprowski wrote: > >> On 24.09.2020 10:28, Joerg Roedel wrote: > >>> On Wed, Sep 23, 2020 at 08:48:26AM +0200, Marek

Re: IOVA allocation dependency between firmware buffer and remaining buffers

2020-09-24 Thread Shaik Ameer Basha
Hi Robin and Marek, On Thu, Sep 24, 2020 at 4:36 PM Robin Murphy wrote: > > On 2020-09-24 11:47, Marek Szyprowski wrote: > > Hi Robin, > > > > On 24.09.2020 12:40, Robin Murphy wrote: > >> On 2020-09-24 11:16, Thierry Reding wrote: > >>> On Thu, Sep 24, 2020 at 10:46:46AM +0200, Marek

Re: IOVA allocation dependency between firmware buffer and remaining buffers

2020-09-24 Thread Robin Murphy
On 2020-09-24 11:47, Marek Szyprowski wrote: Hi Robin, On 24.09.2020 12:40, Robin Murphy wrote: On 2020-09-24 11:16, Thierry Reding wrote: On Thu, Sep 24, 2020 at 10:46:46AM +0200, Marek Szyprowski wrote: On 24.09.2020 10:28, Joerg Roedel wrote: On Wed, Sep 23, 2020 at 08:48:26AM +0200,

Re: IOVA allocation dependency between firmware buffer and remaining buffers

2020-09-24 Thread Marek Szyprowski
Hi Robin, On 24.09.2020 12:40, Robin Murphy wrote: > On 2020-09-24 11:16, Thierry Reding wrote: >> On Thu, Sep 24, 2020 at 10:46:46AM +0200, Marek Szyprowski wrote: >>> On 24.09.2020 10:28, Joerg Roedel wrote: On Wed, Sep 23, 2020 at 08:48:26AM +0200, Marek Szyprowski wrote: > It allows

Re: IOVA allocation dependency between firmware buffer and remaining buffers

2020-09-24 Thread Marek Szyprowski
Hi Thierry, On 24.09.2020 12:16, Thierry Reding wrote: > On Thu, Sep 24, 2020 at 10:46:46AM +0200, Marek Szyprowski wrote: >> On 24.09.2020 10:28, Joerg Roedel wrote: >>> On Wed, Sep 23, 2020 at 08:48:26AM +0200, Marek Szyprowski wrote: It allows to remap given buffer at the specific IOVA

Re: IOVA allocation dependency between firmware buffer and remaining buffers

2020-09-24 Thread Robin Murphy
On 2020-09-24 11:16, Thierry Reding wrote: On Thu, Sep 24, 2020 at 10:46:46AM +0200, Marek Szyprowski wrote: Hi Joerg, On 24.09.2020 10:28, Joerg Roedel wrote: On Wed, Sep 23, 2020 at 08:48:26AM +0200, Marek Szyprowski wrote: It allows to remap given buffer at the specific IOVA address,

Re: IOVA allocation dependency between firmware buffer and remaining buffers

2020-09-24 Thread Thierry Reding
On Thu, Sep 24, 2020 at 10:46:46AM +0200, Marek Szyprowski wrote: > Hi Joerg, > > On 24.09.2020 10:28, Joerg Roedel wrote: > > On Wed, Sep 23, 2020 at 08:48:26AM +0200, Marek Szyprowski wrote: > >> It allows to remap given buffer at the specific IOVA address, although > >> it doesn't guarantee

Re: IOVA allocation dependency between firmware buffer and remaining buffers

2020-09-24 Thread Marek Szyprowski
Hi Joerg, On 24.09.2020 10:28, Joerg Roedel wrote: > On Wed, Sep 23, 2020 at 08:48:26AM +0200, Marek Szyprowski wrote: >> It allows to remap given buffer at the specific IOVA address, although >> it doesn't guarantee that those specific addresses won't be later used >> by the IOVA allocator.

Re: IOVA allocation dependency between firmware buffer and remaining buffers

2020-09-24 Thread Joerg Roedel
On Wed, Sep 23, 2020 at 08:48:26AM +0200, Marek Szyprowski wrote: > It allows to remap given buffer at the specific IOVA address, although > it doesn't guarantee that those specific addresses won't be later used > by the IOVA allocator. Probably it would make sense to add an API for > generic

Re: IOVA allocation dependency between firmware buffer and remaining buffers

2020-09-23 Thread Christoph Hellwig
On Wed, Sep 23, 2020 at 01:15:33PM +0530, Ajay kumar wrote: > Hello all, > > We pretty much tried to solve the same issue here with a new API in DMA-IOMMU: > https://lore.kernel.org/linux-iommu/20200811054912.ga...@infradead.org/T/ > > Christopher- the user part would be MFC devices on exynos

Re: IOVA allocation dependency between firmware buffer and remaining buffers

2020-09-23 Thread Ajay kumar
Hello all, We pretty much tried to solve the same issue here with a new API in DMA-IOMMU: https://lore.kernel.org/linux-iommu/20200811054912.ga...@infradead.org/T/ Christopher- the user part would be MFC devices on exynos platforms Thanks, Ajay On 9/23/20, Christoph Hellwig wrote: > On Wed,

Re: IOVA allocation dependency between firmware buffer and remaining buffers

2020-09-23 Thread Ajay Kumar
Hello all, We pretty much tried to solve the same issue here with a new API in DMA-IOMMU: https://lore.kernel.org/linux-iommu/20200811054912.ga...@infradead.org/T/ Christoph - the user part would be MFC devices on exynos platforms Thanks, Ajay On Wed, Sep 23, 2020 at 12:28 PM Christoph

Re: IOVA allocation dependency between firmware buffer and remaining buffers

2020-09-23 Thread Christoph Hellwig
On Wed, Sep 23, 2020 at 08:48:26AM +0200, Marek Szyprowski wrote: > Hi Shaik, > > I've run into similar problem while adapting S5P-MFC and Exynos4-IS > drivers for generic IOMMU-DMA framework. Here is my first solution: >

Re: IOVA allocation dependency between firmware buffer and remaining buffers

2020-09-23 Thread Marek Szyprowski
Hi Shaik, I've run into similar problem while adapting S5P-MFC and Exynos4-IS drivers for generic IOMMU-DMA framework. Here is my first solution: https://lore.kernel.org/linux-samsung-soc/20200918144833.14618-1-m.szyprow...@samsung.com/T/ It allows to remap given buffer at the specific IOVA

Re: IOVA allocation dependency between firmware buffer and remaining buffers

2020-04-24 Thread Shaik Ameer Basha
On Fri, Apr 24, 2020 at 8:59 PM Robin Murphy wrote: > > On 2020-04-24 4:04 pm, Ajay kumar wrote: > > Can someone check this? > > > > On Mon, Apr 20, 2020 at 9:24 PM Ajay kumar wrote: > >> > >> Hi All, > >> > >> I have an IOMMU master which has limitations as mentioned below: > >> 1) The IOMMU

Re: IOVA allocation dependency between firmware buffer and remaining buffers

2020-04-24 Thread Robin Murphy
On 2020-04-24 4:04 pm, Ajay kumar wrote: Can someone check this? On Mon, Apr 20, 2020 at 9:24 PM Ajay kumar wrote: Hi All, I have an IOMMU master which has limitations as mentioned below: 1) The IOMMU master internally executes a firmware, and the firmware memory is allocated by the same

Re: IOVA allocation dependency between firmware buffer and remaining buffers

2020-04-24 Thread Ajay kumar
Can someone check this? On Mon, Apr 20, 2020 at 9:24 PM Ajay kumar wrote: > > Hi All, > > I have an IOMMU master which has limitations as mentioned below: > 1) The IOMMU master internally executes a firmware, and the firmware memory > is allocated by the same master driver. > The firmware buffer