[Accel-config] Re: [PATCH] accel-config: Replicate driver error codes in idxd.h in library

I think copying will have the problem of compiler picking different
ones. Library may use the copied version while the app may get the one
in /usr/include. Do you think defining new constants would be safer?

On Mon, Jul 19, 2021 at 08:17:28AM -0700, Dave Jiang wrote:
> 
> On 7/16/2021 6:46 PM, ramesh.thomas(a)intel.com wrote:
> > From: Ramesh Thomas <ramesh.thomas(a)intel.com>
> >
> > Duplicate the driver error code related constants defined in idxd.h in
> > library to avoid dependency on kernel versions.
> 
> I think instead of replicating certain defines, the suggestion by Vishal
> was to make a copy of the latest kernel uapi idxd.h in accel-config.
> This is probably the best. Otherwise you'll have conflicts if this is
> build with the latest idxd.h having those defines as well.
> 
> 
> >
> > Signed-off-by: Ramesh Thomas <ramesh.thomas(a)intel.com>
> > ---
> >   accfg/lib/libaccfg.c | 24 +++++++++++++++++++++++-
> >   1 file changed, 23 insertions(+), 1 deletion(-)
> >
> > diff --git a/accfg/lib/libaccfg.c b/accfg/lib/libaccfg.c
> > index f21cab5..1a06d9c 100644
> > --- a/accfg/lib/libaccfg.c
> > +++ b/accfg/lib/libaccfg.c
> > @@ -27,7 +27,6 @@
> >   #include <accfg/libaccel_config.h>
> >   #include <fnmatch.h>
> >   #include "private.h"
> > -#include <linux/idxd.h>
> >
> >   #define MDEV_POSTFIX "mdev_supported_types"
> >   #define IDXD_DRIVER_BIND_PATH "/sys/bus/dsa/drivers/idxd"
> > @@ -74,6 +73,29 @@ enum {
> >   	ACCFG_CMD_STATUS_ERROR = 0x80010000,
> >   };
> >
> > +/* driver error codes from kernel idxd.h */
> > +enum idxd_scmd_stat {
> > +	IDXD_SCMD_DEV_ENABLED = 0x80000010,
> > +	IDXD_SCMD_DEV_NOT_ENABLED = 0x80000020,
> > +	IDXD_SCMD_WQ_ENABLED = 0x80000021,
> > +	IDXD_SCMD_DEV_DMA_ERR = 0x80020000,
> > +	IDXD_SCMD_WQ_NO_GRP = 0x80030000,
> > +	IDXD_SCMD_WQ_NO_NAME = 0x80040000,
> > +	IDXD_SCMD_WQ_NO_SVM = 0x80050000,
> > +	IDXD_SCMD_WQ_NO_THRESH = 0x80060000,
> > +	IDXD_SCMD_WQ_PORTAL_ERR = 0x80070000,
> > +	IDXD_SCMD_WQ_RES_ALLOC_ERR = 0x80080000,
> > +	IDXD_SCMD_PERCPU_ERR = 0x80090000,
> > +	IDXD_SCMD_DMA_CHAN_ERR = 0x800a0000,
> > +	IDXD_SCMD_CDEV_ERR = 0x800b0000,
> > +	IDXD_SCMD_WQ_NO_SWQ_SUPPORT = 0x800c0000,
> > +	IDXD_SCMD_WQ_NONE_CONFIGURED = 0x800d0000,
> > +	IDXD_SCMD_WQ_NO_SIZE = 0x800e0000,
> > +};
> > +
> > +#define IDXD_SCMD_SOFTERR_MASK	0x80000000
> > +#define IDXD_SCMD_SOFTERR_SHIFT	16
> > +
> >   #define SCMD_STAT(x) (((x) & ~IDXD_SCMD_SOFTERR_MASK) >> \
> >   		IDXD_SCMD_SOFTERR_SHIFT)
> >