Re: [PATCH v7 04/11] dmaengine: Introduce max SG list entries capability

2020-07-17 Thread Serge Semin
On Fri, Jul 17, 2020 at 01:44:03PM +0530, Vinod Koul wrote: > On 15-07-20, 20:08, Serge Semin wrote: > > On Wed, Jul 15, 2020 at 04:43:15PM +0530, Vinod Koul wrote: > > > On 10-07-20, 19:14, Serge Semin wrote: > > > > On Fri, Jul 10, 2020 at 02:51:33PM +0300, Peter Ujfalusi wrote: > > > > > > > >

Re: [PATCH v7 04/11] dmaengine: Introduce max SG list entries capability

2020-07-17 Thread Vinod Koul
On 15-07-20, 20:08, Serge Semin wrote: > On Wed, Jul 15, 2020 at 04:43:15PM +0530, Vinod Koul wrote: > > On 10-07-20, 19:14, Serge Semin wrote: > > > On Fri, Jul 10, 2020 at 02:51:33PM +0300, Peter Ujfalusi wrote: > > > > > > Since we should be able to handle longer lists and this is kind of a > >

Re: [PATCH v7 04/11] dmaengine: Introduce max SG list entries capability

2020-07-15 Thread Serge Semin
On Wed, Jul 15, 2020 at 04:43:15PM +0530, Vinod Koul wrote: > On 10-07-20, 19:14, Serge Semin wrote: > > On Fri, Jul 10, 2020 at 02:51:33PM +0300, Peter Ujfalusi wrote: > > > > Since we should be able to handle longer lists and this is kind of a > > > hint for clients that above this number of nen

Re: [PATCH v7 04/11] dmaengine: Introduce max SG list entries capability

2020-07-15 Thread Vinod Koul
On 10-07-20, 19:14, Serge Semin wrote: > On Fri, Jul 10, 2020 at 02:51:33PM +0300, Peter Ujfalusi wrote: > > Since we should be able to handle longer lists and this is kind of a > > hint for clients that above this number of nents the list will be broken > > up to smaller 'bursts', which when trav

Re: [PATCH v7 04/11] dmaengine: Introduce max SG list entries capability

2020-07-10 Thread Serge Semin
On Fri, Jul 10, 2020 at 02:51:33PM +0300, Peter Ujfalusi wrote: > Hi Sergey, > > On 10/07/2020 12.27, Serge Semin wrote: > > Hello Peter > > > > On Fri, Jul 10, 2020 at 11:31:47AM +0300, Peter Ujfalusi wrote: > >> > >> > >> On 10/07/2020 1.45, Serge Semin wrote: > >>> Some devices may lack the su

Re: [PATCH v7 04/11] dmaengine: Introduce max SG list entries capability

2020-07-10 Thread Peter Ujfalusi
Hi Sergey, On 10/07/2020 12.27, Serge Semin wrote: > Hello Peter > > On Fri, Jul 10, 2020 at 11:31:47AM +0300, Peter Ujfalusi wrote: >> >> >> On 10/07/2020 1.45, Serge Semin wrote: >>> Some devices may lack the support of the hardware accelerated SG list >>> entries automatic walking through and

Re: [PATCH v7 04/11] dmaengine: Introduce max SG list entries capability

2020-07-10 Thread Serge Semin
Hello Peter On Fri, Jul 10, 2020 at 11:31:47AM +0300, Peter Ujfalusi wrote: > > > On 10/07/2020 1.45, Serge Semin wrote: > > Some devices may lack the support of the hardware accelerated SG list > > entries automatic walking through and execution. In this case a burden of > > the SG list travers

Re: [PATCH v7 04/11] dmaengine: Introduce max SG list entries capability

2020-07-10 Thread Peter Ujfalusi
On 10/07/2020 1.45, Serge Semin wrote: > Some devices may lack the support of the hardware accelerated SG list > entries automatic walking through and execution. In this case a burden of > the SG list traversal and DMA engine re-initialization lies on the > DMA engine driver (normally implemente