[rdma-core,04/10] providers: Use the new match_device and allocate_device ops

Commit Message

Jason Gunthorpe Sept. 19, 2017, 9:18 p.m. UTC

This is the first step to simplify the provider binding process.

Checking of the ABI version is hoisted into the core code, as are some
of the common error messages.

Signed-off-by: Jason Gunthorpe <[e-mail]>
---
 providers/bnxt_re/main.c           | 36 ++++++++++------------
 providers/cxgb3/iwch.c             | 60 ++++++++++++++++--------------------
 providers/cxgb4/dev.c              | 60 +++++++++++++++++++-----------------
 providers/hfi1verbs/hfiverbs.c     | 31 ++++++++++---------
 providers/hns/hns_roce_u.c         | 63 +++++++++++++++++++-------------------
 providers/i40iw/i40iw_umain.c      | 39 ++++++++++++++---------
 providers/ipathverbs/ipathverbs.c  | 32 ++++++++++---------
 providers/mlx4/mlx4.c              | 42 +++++++++++--------------
 providers/mlx5/mlx5.c              | 42 ++++++++++---------------
 providers/mthca/mthca.c            | 43 +++++++++++++-------------
 providers/nes/nes_umain.c          | 48 ++++++++++++++++-------------
 providers/ocrdma/ocrdma_main.c     | 46 ++++++++++++----------------
 providers/qedr/qelr_main.c         | 35 ++++++++++-----------
 providers/rxe/rxe.c                | 28 +++++++++--------
 providers/vmw_pvrdma/pvrdma_main.c | 49 ++++++++++-------------------
 15 files changed, 317 insertions(+), 337 deletions(-)

Comments

Steve Wise Sept. 19, 2017, 9:29 p.m. UTC | #1

> 
> This is the first step to simplify the provider binding process.
> 
> Checking of the ABI version is hoisted into the core code, as are some
> of the common error messages.
> 
> Signed-off-by: Jason Gunthorpe <[e-mail]>
> ---

<snip>

> diff --git a/providers/cxgb4/dev.c b/providers/cxgb4/dev.c
> index 492b3978995607..43c5a3c97bc864 100644
> --- a/providers/cxgb4/dev.c
> +++ b/providers/cxgb4/dev.c


<snip>

> @@ -462,22 +455,30 @@ found:
>  			fw_min, FW_MIN);
>  		fflush(stderr);
>  	}
> +	return true;
> +}
> 
> -	PDBG("%s found vendor %d device %d type %d\n",
> -	     __FUNCTION__, vendor, device,
> CHELSIO_CHIP_VERSION(hca_table[i].device >> 8));
> +static struct verbs_device *c4iw_device_alloc(struct verbs_sysfs_dev
> *sysfs_dev)
> +{
> +	struct c4iw_dev *dev;
> +	struct hca_ent *hca_ent = sysfs_dev->provider_data;
> +
> +	c4iw_page_size = sysconf(_SC_PAGESIZE);
> +	c4iw_page_shift = long_log2(c4iw_page_size);
> +	c4iw_page_mask = ~(c4iw_page_size - 1);
> 
>  	c4iw_page_size = sysconf(_SC_PAGESIZE);
>  	c4iw_page_shift = long_log2(c4iw_page_size);
>  	c4iw_page_mask = ~(c4iw_page_size - 1);


The above doesn't look right.

Other than this, the cxgb bits look ok.  Did you test it? 

Jason Gunthorpe Sept. 19, 2017, 10:32 p.m. UTC | #2

On Tue, Sep 19, 2017 at 04:29:17PM -0500, Steve Wise wrote:
> > +	struct c4iw_dev *dev;
> > +	struct hca_ent *hca_ent = sysfs_dev->provider_data;
> > +
> > +	c4iw_page_size = sysconf(_SC_PAGESIZE);
> > +	c4iw_page_shift = long_log2(c4iw_page_size);
> > +	c4iw_page_mask = ~(c4iw_page_size - 1);
> > 
> >  	c4iw_page_size = sysconf(_SC_PAGESIZE);
> >  	c4iw_page_shift = long_log2(c4iw_page_size);
> >  	c4iw_page_mask = ~(c4iw_page_size - 1);
> 
> 
> The above doesn't look right.

Oops, that is a rebasing-caused error I missed in this big series,
thank you I will correct it.

> Other than this, the cxgb bits look ok.  Did you test it? ????

Not on cxgb, I tested other mlx4 and rxe to see that things were
working as expected. Since the matching code is now general that
covers a pretty big space..

Jason
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Amrani, Ram Sept. 24, 2017, 1:44 p.m. UTC | #3

> diff --git a/providers/qedr/qelr_main.c b/providers/qedr/qelr_main.c
> index 0be4a8c82a1e05..4d1b92f40a413a 100644
> --- a/providers/qedr/qelr_main.c
> +++ b/providers/qedr/qelr_main.c
> @@ -227,53 +227,50 @@ static void qelr_free_context(struct ibv_context *ibctx)
>  	free(ctx);
>  }
> 
> -static struct verbs_device *qelr_driver_init(const char *uverbs_sys_path,
> -					     int abi_version)
> +static bool qedr_device_match(struct verbs_sysfs_dev *sysfs_dev)
>  {
> +	const char *uverbs_sys_path = sysfs_dev->sysfs_path;
>  	char value[16];
> -	struct qelr_device *dev;
>  	unsigned int vendor, device;
>  	int i;
> 
>  	if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
>  				value, sizeof(value)) < 0)
> -		return NULL;
> +		return false;
> 
>  	sscanf(value, "%i", &vendor);
> 
>  	if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
>  				value, sizeof(value)) < 0)
> -		return NULL;
> +		return false;
> 
>  	sscanf(value, "%i", &device);
> 
>  	for (i = 0; i < sizeof(hca_table) / sizeof(hca_table[0]); ++i)
>  		if (vendor == hca_table[i].vendor &&
>  		    device == hca_table[i].device)
> -			goto found;
> +			return true;
> 
> -	return NULL;
> -found:
> -	if (abi_version != QELR_ABI_VERSION) {
> -		fprintf(stderr,
> -			"Fatal: libqedr ABI version %d of %s is not supported.\n",
> -			abi_version, uverbs_sys_path);
> -		return NULL;
> -	}
> +	return false;
> +}
> +
> +static struct verbs_device *qedr_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
> +{
> +	struct qelr_device *dev;
> 
>  	dev = calloc(1, sizeof(*dev));
> -	if (!dev) {
> -		qelr_err("%s() Fatal: fail allocate device for libqedr\n",
> -			 __func__);
> +	if (!dev)
>  		return NULL;
> -	}
> 
>  	return &dev->ibv_dev;
>  }
> 
>  static const struct verbs_device_ops qelr_dev_ops = {
>  	.name = "qelr",
> -	.init_device = qelr_driver_init,
> +	.match_min_abi_version = QELR_ABI_VERSION,
> +	.match_max_abi_version = QELR_ABI_VERSION,
> +	.match_device = qedr_device_match,
> +	.alloc_device = qedr_device_alloc,
>  	.uninit_device = qelr_uninit_device,
>  	.alloc_context = qelr_alloc_context,
>  	.free_context = qelr_free_context,

Please use qelr_ prefix for the functions.
There shouldn't be any qedr in this file except for a comment, maybe.

Other than that:
Signed-off-by: Ram Amrani <[e-mail]>


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Devesh Sharma Sept. 25, 2017, 7:41 a.m. UTC | #4

bnxt_re related part looks good to me

Acked-by: Devesh Sharma <[e-mail]>

On Wed, Sep 20, 2017 at 2:48 AM, Jason Gunthorpe
<[e-mail]> wrote:
> This is the first step to simplify the provider binding process.
>
> Checking of the ABI version is hoisted into the core code, as are some
> of the common error messages.
>
> Signed-off-by: Jason Gunthorpe <[e-mail]>
> ---
>  providers/bnxt_re/main.c           | 36 ++++++++++------------
>  providers/cxgb3/iwch.c             | 60 ++++++++++++++++--------------------
>  providers/cxgb4/dev.c              | 60 +++++++++++++++++++-----------------
>  providers/hfi1verbs/hfiverbs.c     | 31 ++++++++++---------
>  providers/hns/hns_roce_u.c         | 63 +++++++++++++++++++-------------------
>  providers/i40iw/i40iw_umain.c      | 39 ++++++++++++++---------
>  providers/ipathverbs/ipathverbs.c  | 32 ++++++++++---------
>  providers/mlx4/mlx4.c              | 42 +++++++++++--------------
>  providers/mlx5/mlx5.c              | 42 ++++++++++---------------
>  providers/mthca/mthca.c            | 43 +++++++++++++-------------
>  providers/nes/nes_umain.c          | 48 ++++++++++++++++-------------
>  providers/ocrdma/ocrdma_main.c     | 46 ++++++++++++----------------
>  providers/qedr/qelr_main.c         | 35 ++++++++++-----------
>  providers/rxe/rxe.c                | 28 +++++++++--------
>  providers/vmw_pvrdma/pvrdma_main.c | 49 ++++++++++-------------------
>  15 files changed, 317 insertions(+), 337 deletions(-)
>
> diff --git a/providers/bnxt_re/main.c b/providers/bnxt_re/main.c
> index d2c2a6847e3c71..c83baacbb9f749 100644
> --- a/providers/bnxt_re/main.c
> +++ b/providers/bnxt_re/main.c
> @@ -174,43 +174,38 @@ static void bnxt_re_uninit_context(struct verbs_device *vdev,
>         }
>  }
>
> -static struct verbs_device *bnxt_re_driver_init(const char *uverbs_sys_path,
> -                                               int abi_version)
> +static bool bnxt_re_device_match(struct verbs_sysfs_dev *sysfs_dev)
>  {
> +       const char *uverbs_sys_path = sysfs_dev->sysfs_path;
>         char value[10];
> -       struct bnxt_re_dev *dev;
>         unsigned int vendor, device;
>         int i;
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
>                                 value, sizeof(value)) < 0)
> -               return NULL;
> +               return false;
>         vendor = strtol(value, NULL, 16);
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
>                                 value, sizeof(value)) < 0)
> -               return NULL;
> +               return false;
>         device = strtol(value, NULL, 16);
>
>         for (i = 0; i < sizeof(cna_table) / sizeof(cna_table[0]); ++i)
>                 if (vendor == cna_table[i].vendor &&
>                     device == cna_table[i].device)
> -                       goto found;
> -       return NULL;
> -found:
> -       if (abi_version != BNXT_RE_ABI_VERSION) {
> -               fprintf(stderr, DEV "FATAL: Max supported ABI of %s is %d "
> -                       "check for the latest version of kernel driver and"
> -                       "user library\n", uverbs_sys_path, abi_version);
> -               return NULL;
> -       }
> +                       return true;
> +       return false;
> +}
> +
> +static struct verbs_device *
> +bnxt_re_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
> +{
> +       struct bnxt_re_dev *dev;
>
>         dev = calloc(1, sizeof(*dev));
> -       if (!dev) {
> -               fprintf(stderr, DEV "Failed to allocate device for %s\n",
> -                       uverbs_sys_path);
> +       if (!dev)
>                 return NULL;
> -       }
>
>         dev->vdev.sz = sizeof(*dev);
>         dev->vdev.size_of_context =
> @@ -221,7 +216,10 @@ found:
>
>  static const struct verbs_device_ops bnxt_re_dev_ops = {
>         .name = "bnxt_re",
> -       .init_device = bnxt_re_driver_init,
> +       .match_min_abi_version = BNXT_RE_ABI_VERSION,
> +       .match_max_abi_version = BNXT_RE_ABI_VERSION,
> +       .match_device = bnxt_re_device_match,
> +       .alloc_device = bnxt_re_device_alloc,
>         .init_context = bnxt_re_init_context,
>         .uninit_context = bnxt_re_uninit_context,
>  };
> diff --git a/providers/cxgb3/iwch.c b/providers/cxgb3/iwch.c
> index c2423a7ee2cc32..7eb283bd9a89e1 100644
> --- a/providers/cxgb3/iwch.c
> +++ b/providers/cxgb3/iwch.c
> @@ -61,7 +61,7 @@
>           .device = PCI_DEVICE_ID_CHELSIO_##d,          \
>           .type = CHELSIO_##t }
>
> -static struct {
> +static struct hca_ent {
>         unsigned vendor;
>         unsigned device;
>         enum iwch_hca_type type;
> @@ -173,30 +173,31 @@ static void iwch_uninit_device(struct verbs_device *verbs_device)
>         free(dev);
>  }
>
> -static struct verbs_device *cxgb3_driver_init(const char *uverbs_sys_path,
> -                                             int abi_version)
> +static bool iwch_device_match(struct verbs_sysfs_dev *sysfs_dev)
>  {
> -       char devstr[IBV_SYSFS_PATH_MAX], ibdev[16], value[32], *cp;
> -       struct iwch_device *dev;
> +       const char *uverbs_sys_path = sysfs_dev->sysfs_path;
> +       char value[32], *cp;
>         unsigned vendor, device, fw_maj, fw_min;
>         int i;
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
>                                 value, sizeof value) < 0)
> -               return NULL;
> +               return false;
>         sscanf(value, "%i", &vendor);
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
>                                 value, sizeof value) < 0)
> -               return NULL;
> +               return false;
>         sscanf(value, "%i", &device);
>
>         for (i = 0; i < sizeof hca_table / sizeof hca_table[0]; ++i)
>                 if (vendor == hca_table[i].vendor &&
> -                   device == hca_table[i].device)
> +                   device == hca_table[i].device) {
> +                       sysfs_dev->provider_data = &hca_table[i];
>                         goto found;
> +               }
>
> -       return NULL;
> +       return false;
>
>  found:
>
> @@ -204,15 +205,9 @@ found:
>          * Verify that the firmware major number matches.  Major number
>          * mismatches are fatal.  Minor number mismatches are tolerated.
>          */
> -       if (ibv_read_sysfs_file(uverbs_sys_path, "ibdev",
> -                               ibdev, sizeof ibdev) < 0)
> -               return NULL;
> -
> -       memset(devstr, 0, sizeof devstr);
> -       snprintf(devstr, sizeof devstr, "%s/class/infiniband/%s",
> -                ibv_get_sysfs_path(), ibdev);
> -       if (ibv_read_sysfs_file(devstr, "fw_ver", value, sizeof value) < 0)
> -               return NULL;
> +       if (ibv_read_sysfs_file(sysfs_dev->ibdev_path, "fw_ver", value,
> +                               sizeof(value)) < 0)
> +               return false;
>
>         cp = strtok(value+1, ".");
>         sscanf(cp, "%i", &fw_maj);
> @@ -224,7 +219,7 @@ found:
>                         "Firmware major number is %u and libcxgb3 needs %u.\n",
>                         fw_maj, FW_MAJ);
>                 fflush(stderr);
> -               return NULL;
> +               return false;
>         }
>
>         DBGLOG("libcxgb3");
> @@ -236,25 +231,21 @@ found:
>                 fflush(stderr);
>         }
>
> -       if (abi_version > ABI_VERS) {
> -               PDBG("libcxgb3: ABI version mismatch.  "
> -                       "Kernel driver ABI is %u and libcxgb3 needs <= %u.\n",
> -                       abi_version, ABI_VERS);
> -               fflush(stderr);
> -               return NULL;
> -       }
> +       return true;
> +}
>
> -       PDBG("%s found vendor %d device %d type %d\n",
> -            __FUNCTION__, vendor, device, hca_table[i].type);
> +static struct verbs_device *iwch_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
> +{
> +       struct iwch_device *dev;
> +       struct hca_ent *hca_ent = sysfs_dev->provider_data;
>
>         dev = calloc(1, sizeof(*dev));
> -       if (!dev) {
> +       if (!dev)
>                 return NULL;
> -       }
>
>         pthread_spin_init(&dev->lock, PTHREAD_PROCESS_PRIVATE);
> -       dev->hca_type = hca_table[i].type;
> -       dev->abi_version = abi_version;
> +       dev->hca_type = hca_ent->type;
> +       dev->abi_version = sysfs_dev->abi_ver;
>
>         iwch_page_size = sysconf(_SC_PAGESIZE);
>         iwch_page_shift = long_log2(iwch_page_size);
> @@ -285,7 +276,10 @@ err1:
>
>  static const struct verbs_device_ops iwch_dev_ops = {
>         .name = "cxgb3",
> -       .init_device = cxgb3_driver_init,
> +       .match_min_abi_version = 0,
> +       .match_max_abi_version = ABI_VERS,
> +       .match_device = iwch_device_match,
> +       .alloc_device = iwch_device_alloc,
>         .uninit_device = iwch_uninit_device,
>         .alloc_context = iwch_alloc_context,
>         .free_context = iwch_free_context,
> diff --git a/providers/cxgb4/dev.c b/providers/cxgb4/dev.c
> index 492b3978995607..43c5a3c97bc864 100644
> --- a/providers/cxgb4/dev.c
> +++ b/providers/cxgb4/dev.c
> @@ -49,7 +49,7 @@
>   * Macros needed to support the PCI Device ID Table ...
>   */
>  #define CH_PCI_DEVICE_ID_TABLE_DEFINE_BEGIN \
> -       static struct { \
> +       static struct hca_ent { \
>                 unsigned vendor; \
>                 unsigned device; \
>         } hca_table[] = {
> @@ -399,47 +399,40 @@ void dump_state(void)
>   */
>  int c4iw_abi_version = 1;
>
> -static struct verbs_device *cxgb4_driver_init(const char *uverbs_sys_path,
> -                                             int abi_version)
> +static bool c4iw_device_match(struct verbs_sysfs_dev *sysfs_dev)
>  {
> -       char devstr[IBV_SYSFS_PATH_MAX], ibdev[16], value[32], *cp;
> -       struct c4iw_dev *dev;
> +       const char *uverbs_sys_path = sysfs_dev->sysfs_path;
> +       char value[32], *cp;
>         unsigned vendor, device, fw_maj, fw_min;
>         int i;
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
>                                 value, sizeof value) < 0)
> -               return NULL;
> +               return false;
>         sscanf(value, "%i", &vendor);
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
>                                 value, sizeof value) < 0)
> -               return NULL;
> +               return false;
>         sscanf(value, "%i", &device);
>
>         for (i = 0; i < sizeof hca_table / sizeof hca_table[0]; ++i)
>                 if (vendor == hca_table[i].vendor &&
> -                   device == hca_table[i].device)
> +                   device == hca_table[i].device) {
> +                       sysfs_dev->provider_data = &hca_table[i];
>                         goto found;
> +               }
>
> -       return NULL;
> +       return false;
>
>  found:
> -       c4iw_abi_version = abi_version;
> -
>         /*
>          * Verify that the firmware major number matches.  Major number
>          * mismatches are fatal.  Minor number mismatches are tolerated.
>          */
> -       if (ibv_read_sysfs_file(uverbs_sys_path, "ibdev",
> -                               ibdev, sizeof ibdev) < 0)
> -               return NULL;
> -
> -       memset(devstr, 0, sizeof devstr);
> -       snprintf(devstr, sizeof devstr, "%s/class/infiniband/%s",
> -                ibv_get_sysfs_path(), ibdev);
> -       if (ibv_read_sysfs_file(devstr, "fw_ver", value, sizeof value) < 0)
> -               return NULL;
> +       if (ibv_read_sysfs_file(sysfs_dev->ibdev_path, "fw_ver", value,
> +                               sizeof(value)) < 0)
> +               return false;
>
>         cp = strtok(value+1, ".");
>         sscanf(cp, "%i", &fw_maj);
> @@ -451,7 +444,7 @@ found:
>                         "Firmware major number is %u and libcxgb4 needs %u.\n",
>                         fw_maj, FW_MAJ);
>                 fflush(stderr);
> -               return NULL;
> +               return false;
>         }
>
>         DBGLOG("libcxgb4");
> @@ -462,22 +455,30 @@ found:
>                         fw_min, FW_MIN);
>                 fflush(stderr);
>         }
> +       return true;
> +}
>
> -       PDBG("%s found vendor %d device %d type %d\n",
> -            __FUNCTION__, vendor, device, CHELSIO_CHIP_VERSION(hca_table[i].device >> 8));
> +static struct verbs_device *c4iw_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
> +{
> +       struct c4iw_dev *dev;
> +       struct hca_ent *hca_ent = sysfs_dev->provider_data;
> +
> +       c4iw_page_size = sysconf(_SC_PAGESIZE);
> +       c4iw_page_shift = long_log2(c4iw_page_size);
> +       c4iw_page_mask = ~(c4iw_page_size - 1);
>
>         c4iw_page_size = sysconf(_SC_PAGESIZE);
>         c4iw_page_shift = long_log2(c4iw_page_size);
>         c4iw_page_mask = ~(c4iw_page_size - 1);
>
>         dev = calloc(1, sizeof *dev);
> -       if (!dev) {
> +       if (!dev)
>                 return NULL;
> -       }
>
>         pthread_spin_init(&dev->lock, PTHREAD_PROCESS_PRIVATE);
> -       dev->chip_version = CHELSIO_CHIP_VERSION(hca_table[i].device >> 8);
> -       dev->abi_version = abi_version;
> +       c4iw_abi_version = sysfs_dev->abi_ver;
> +       dev->chip_version = CHELSIO_CHIP_VERSION(hca_ent->device >> 8);
> +       dev->abi_version = sysfs_dev->abi_ver;
>         list_node_init(&dev->list);
>
>         PDBG("%s device claimed\n", __FUNCTION__);
> @@ -514,7 +515,10 @@ found:
>
>  static const struct verbs_device_ops c4iw_dev_ops = {
>         .name = "cxgb4",
> -       .init_device = cxgb4_driver_init,
> +       .match_min_abi_version = 0,
> +       .match_max_abi_version = INT_MAX,
> +       .match_device = c4iw_device_match,
> +       .alloc_device = c4iw_device_alloc,
>         .uninit_device = c4iw_uninit_device,
>         .alloc_context = c4iw_alloc_context,
>         .free_context = c4iw_free_context,
> diff --git a/providers/hfi1verbs/hfiverbs.c b/providers/hfi1verbs/hfiverbs.c
> index 247831eb211804..5bb436593517e1 100644
> --- a/providers/hfi1verbs/hfiverbs.c
> +++ b/providers/hfi1verbs/hfiverbs.c
> @@ -180,47 +180,50 @@ static void hf11_uninit_device(struct verbs_device *verbs_device)
>         free(dev);
>  }
>
> -static struct verbs_device *hfi1_driver_init(const char *uverbs_sys_path,
> -                                            int abi_version)
> +static bool hfi1_device_match(struct verbs_sysfs_dev *sysfs_dev)
>  {
> +       const char *uverbs_sys_path = sysfs_dev->sysfs_path;
>         char                    value[8];
> -       struct hfi1_device    *dev;
>         unsigned                vendor, device;
>         int                     i;
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
>                                 value, sizeof value) < 0)
> -               return NULL;
> +               return false;
>         sscanf(value, "%i", &vendor);
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
>                                 value, sizeof value) < 0)
> -               return NULL;
> +               return false;
>         sscanf(value, "%i", &device);
>
>         for (i = 0; i < sizeof hca_table / sizeof hca_table[0]; ++i)
>                 if (vendor == hca_table[i].vendor &&
>                     device == hca_table[i].device)
> -                       goto found;
> +                       return true;
>
> -       return NULL;
> +       return false;
> +}
> +
> +static struct verbs_device *hfi1_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
> +{
> +       struct hfi1_device    *dev;
>
> -found:
>         dev = calloc(1, sizeof(*dev));
> -       if (!dev) {
> -               fprintf(stderr, PFX "Fatal: couldn't allocate device for %s\n",
> -                       uverbs_sys_path);
> +       if (!dev)
>                 return NULL;
> -       }
>
> -       dev->abi_version = abi_version;
> +       dev->abi_version = sysfs_dev->abi_ver;
>
>         return &dev->ibv_dev;
>  }
>
>  static const struct verbs_device_ops hfi1_dev_ops = {
>         .name = "hfi1verbs",
> -       .init_device = hfi1_driver_init,
> +       .match_min_abi_version = 0,
> +       .match_max_abi_version = INT_MAX,
> +       .match_device = hfi1_device_match,
> +       .alloc_device = hfi1_device_alloc,
>         .uninit_device  = hf11_uninit_device,
>         .alloc_context = hfi1_alloc_context,
>         .free_context = hfi1_free_context,
> diff --git a/providers/hns/hns_roce_u.c b/providers/hns/hns_roce_u.c
> index fe2d009ebe3737..88389721811fce 100644
> --- a/providers/hns/hns_roce_u.c
> +++ b/providers/hns/hns_roce_u.c
> @@ -44,20 +44,18 @@
>  #define HID_LEN                        15
>  #define DEV_MATCH_LEN          128
>
> -static const struct {
> -       char     hid[HID_LEN];
> -       void     *data;
> -       int      version;
> -} acpi_table[] = {
> +struct hca_ent {
> +       const char *str;
> +       struct hns_roce_u_hw *data;
> +       int version;
> +};
> +
> +static const struct hca_ent acpi_table[] = {
>          {"acpi:HISI00D1:", &hns_roce_u_hw_v1, HNS_ROCE_HW_VER1},
>          {},
>  };
>
> -static const struct {
> -       char     compatible[DEV_MATCH_LEN];
> -       void     *data;
> -       int      version;
> -} dt_table[] = {
> +static const struct hca_ent dt_table[] = {
>         {"hisilicon,hns-roce-v1", &hns_roce_u_hw_v1, HNS_ROCE_HW_VER1},
>         {},
>  };
> @@ -180,52 +178,53 @@ static void hns_uninit_device(struct verbs_device *verbs_device)
>         free(dev);
>  }
>
> -static struct verbs_device *hns_roce_driver_init(const char *uverbs_sys_path,
> -                                                int abi_version)
> +static bool hns_device_match(struct verbs_sysfs_dev *sysfs_dev)
>  {
> -       struct hns_roce_device  *dev;
> +       const char *uverbs_sys_path = sysfs_dev->sysfs_path;
>         char                     value[128];
>         int                      i;
> -       void                     *u_hw;
> -       int                      hw_version;
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/modalias",
>                                 value, sizeof(value)) > 0)
>                 for (i = 0; i < sizeof(acpi_table) / sizeof(acpi_table[0]); ++i)
> -                       if (!strcmp(value, acpi_table[i].hid)) {
> -                               u_hw = acpi_table[i].data;
> -                               hw_version = acpi_table[i].version;
> -                               goto found;
> +                       if (!strcmp(value, acpi_table[i].str)) {
> +                               sysfs_dev->provider_data =
> +                                   (void *)&acpi_table[i];
> +                               return true;
>                         }
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/of_node/compatible",
>                                 value, sizeof(value)) > 0)
>                 for (i = 0; i < sizeof(dt_table) / sizeof(dt_table[0]); ++i)
> -                       if (!strcmp(value, dt_table[i].compatible)) {
> -                               u_hw = dt_table[i].data;
> -                               hw_version = dt_table[i].version;
> -                               goto found;
> +                       if (!strcmp(value, dt_table[i].str)) {
> +                               sysfs_dev->provider_data = (void *)&dt_table[i];
> +                               return true;
>                         }
>
> -       return NULL;
> +       return false;
> +}
> +
> +static struct verbs_device *hns_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
> +{
> +       struct hns_roce_device  *dev;
> +       const struct hca_ent *hca_ent = sysfs_dev->provider_data;
>
> -found:
>         dev = calloc(1, sizeof(*dev));
> -       if (!dev) {
> -               fprintf(stderr, PFX "Fatal: couldn't allocate device for %s\n",
> -                       uverbs_sys_path);
> +       if (!dev)
>                 return NULL;
> -       }
>
> -       dev->u_hw = (struct hns_roce_u_hw *)u_hw;
> -       dev->hw_version = hw_version;
> +       dev->u_hw = hca_ent->data;
> +       dev->hw_version = hca_ent->version;
>         dev->page_size   = sysconf(_SC_PAGESIZE);
>         return &dev->ibv_dev;
>  }
>
>  static const struct verbs_device_ops hns_roce_dev_ops = {
>         .name = "hns",
> -       .init_device = hns_roce_driver_init,
> +       .match_min_abi_version = 0,
> +       .match_max_abi_version = INT_MAX,
> +       .match_device = hns_device_match,
> +       .alloc_device = hns_device_alloc,
>         .uninit_device = hns_uninit_device,
>         .alloc_context = hns_roce_alloc_context,
>         .free_context = hns_roce_free_context,
> diff --git a/providers/i40iw/i40iw_umain.c b/providers/i40iw/i40iw_umain.c
> index 90d37651d1f702..bcba6158e60e40 100644
> --- a/providers/i40iw/i40iw_umain.c
> +++ b/providers/i40iw/i40iw_umain.c
> @@ -55,7 +55,7 @@
>           .device = d,          \
>           .type = INTEL_ ## t }
>
> -static struct {
> +static struct hca_ent {
>         unsigned int vendor;
>         unsigned int device;
>         enum i40iw_uhca_type type;
> @@ -220,44 +220,53 @@ static void i40iw_uninit_device(struct verbs_device *verbs_device)
>   * @uverbs_sys_path: sys path
>   * @abi_version: not used
>   */
> -static struct verbs_device *i40iw_driver_init(const char *uverbs_sys_path,
> -                                             int abi_version)
> +static bool i40iw_device_match(struct verbs_sysfs_dev *sysfs_dev)
>  {
> +       const char *uverbs_sys_path = sysfs_dev->sysfs_path;
>         char value[16];
> -       struct i40iw_udevice *dev;
>         unsigned int vendor, device;
>         int i;
>
>         if ((ibv_read_sysfs_file(uverbs_sys_path, "device/vendor", value, sizeof(value)) < 0) ||
>             (sscanf(value, "%i", &vendor) != 1))
> -               return NULL;
> +               return false;
>
>         if ((ibv_read_sysfs_file(uverbs_sys_path, "device/device", value, sizeof(value)) < 0) ||
>             (sscanf(value, "%i", &device) != 1))
> -               return NULL;
> +               return false;
>
>         for (i = 0; i < sizeof(hca_table) / sizeof(hca_table[0]); ++i) {
>                 if (vendor == hca_table[i].vendor &&
> -                   device == hca_table[i].device)
> -                       goto found;
> +                   device == hca_table[i].device) {
> +                       sysfs_dev->provider_data = &hca_table[i];
> +                       return true;
> +               }
>         }
>
> -       return NULL;
> -found:
> +       return false;
> +}
> +
> +static struct verbs_device *
> +i40iw_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
> +{
> +       struct i40iw_udevice *dev;
> +       struct hca_ent *hca_ent = sysfs_dev->provider_data;
> +
>         dev = calloc(1, sizeof(*dev));
> -       if (!dev) {
> -               fprintf(stderr, PFX "%s: failed to allocate memory for device object\n", __func__);
> +       if (!dev)
>                 return NULL;
> -       }
>
> -       dev->hca_type = hca_table[i].type;
> +       dev->hca_type = hca_ent->type;
>         dev->page_size = I40IW_HW_PAGE_SIZE;
>         return &dev->ibv_dev;
>  }
>
>  static const struct verbs_device_ops i40iw_udev_ops = {
>         .name = "i40iw",
> -       .init_device = i40iw_driver_init,
> +       .match_min_abi_version = 0,
> +       .match_max_abi_version = INT_MAX,
> +       .match_device = i40iw_device_match,
> +       .alloc_device = i40iw_device_alloc,
>         .uninit_device  = i40iw_uninit_device,
>         .alloc_context = i40iw_ualloc_context,
>         .free_context = i40iw_ufree_context,
> diff --git a/providers/ipathverbs/ipathverbs.c b/providers/ipathverbs/ipathverbs.c
> index ebdf5b828e1784..3c141263d8ff86 100644
> --- a/providers/ipathverbs/ipathverbs.c
> +++ b/providers/ipathverbs/ipathverbs.c
> @@ -179,47 +179,51 @@ static void ipath_uninit_device(struct verbs_device *verbs_device)
>         free(dev);
>  }
>
> -static struct verbs_device *ipath_driver_init(const char *uverbs_sys_path,
> -                                             int abi_version)
> +static bool ipath_device_match(struct verbs_sysfs_dev *sysfs_dev)
>  {
> +       const char *uverbs_sys_path = sysfs_dev->sysfs_path;
>         char                    value[8];
> -       struct ipath_device    *dev;
>         unsigned                vendor, device;
>         int                     i;
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
>                                 value, sizeof value) < 0)
> -               return NULL;
> +               return false;
>         sscanf(value, "%i", &vendor);
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
>                                 value, sizeof value) < 0)
> -               return NULL;
> +               return false;
>         sscanf(value, "%i", &device);
>
>         for (i = 0; i < sizeof hca_table / sizeof hca_table[0]; ++i)
>                 if (vendor == hca_table[i].vendor &&
>                     device == hca_table[i].device)
> -                       goto found;
> +                       return true;
>
> -       return NULL;
> +       return false;
> +}
> +
> +static struct verbs_device *
> +ipath_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
> +{
> +       struct ipath_device    *dev;
>
> -found:
>         dev = calloc(1, sizeof(*dev));
> -       if (!dev) {
> -               fprintf(stderr, PFX "Fatal: couldn't allocate device for %s\n",
> -                       uverbs_sys_path);
> +       if (!dev)
>                 return NULL;
> -       }
>
> -       dev->abi_version = abi_version;
> +       dev->abi_version = sysfs_dev->abi_ver;
>
>         return &dev->ibv_dev;
>  }
>
>  static const struct verbs_device_ops ipath_dev_ops = {
>         .name = "ipathverbs",
> -       .init_device = ipath_driver_init,
> +       .match_min_abi_version = 0,
> +       .match_max_abi_version = INT_MAX,
> +       .match_device = ipath_device_match,
> +       .alloc_device = ipath_device_alloc,
>         .uninit_device  = ipath_uninit_device,
>         .alloc_context = ipath_alloc_context,
>         .free_context = ipath_free_context,
> diff --git a/providers/mlx4/mlx4.c b/providers/mlx4/mlx4.c
> index 0eefa40af16d83..b52684a563b495 100644
> --- a/providers/mlx4/mlx4.c
> +++ b/providers/mlx4/mlx4.c
> @@ -286,50 +286,41 @@ static void mlx4_uninit_device(struct verbs_device *verbs_device)
>         free(dev);
>  }
>
> -static struct verbs_device *mlx4_driver_init(const char *uverbs_sys_path, int abi_version)
> +static bool mlx4_device_match(struct verbs_sysfs_dev *sysfs_dev)
>  {
> +       const char *uverbs_sys_path = sysfs_dev->sysfs_path;
>         char                    value[8];
> -       struct mlx4_device    *dev;
>         unsigned                vendor, device;
>         int                     i;
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
>                                 value, sizeof value) < 0)
> -               return NULL;
> +               return false;
>         vendor = strtol(value, NULL, 16);
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
>                                 value, sizeof value) < 0)
> -               return NULL;
> +               return false;
>         device = strtol(value, NULL, 16);
>
>         for (i = 0; i < sizeof hca_table / sizeof hca_table[0]; ++i)
>                 if (vendor == hca_table[i].vendor &&
>                     device == hca_table[i].device)
> -                       goto found;
> -
> -       return NULL;
> -
> -found:
> -       if (abi_version < MLX4_UVERBS_MIN_ABI_VERSION ||
> -           abi_version > MLX4_UVERBS_MAX_ABI_VERSION) {
> -               fprintf(stderr, PFX "Fatal: ABI version %d of %s is not supported "
> -                       "(min supported %d, max supported %d)\n",
> -                       abi_version, uverbs_sys_path,
> -                       MLX4_UVERBS_MIN_ABI_VERSION,
> -                       MLX4_UVERBS_MAX_ABI_VERSION);
> -               return NULL;
> -       }
> +                       return true;
> +
> +       return false;
> +}
> +
> +static struct verbs_device *mlx4_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
> +{
> +       struct mlx4_device *dev;
>
>         dev = calloc(1, sizeof *dev);
> -       if (!dev) {
> -               fprintf(stderr, PFX "Fatal: couldn't allocate device for %s\n",
> -                       uverbs_sys_path);
> +       if (!dev)
>                 return NULL;
> -       }
>
>         dev->page_size   = sysconf(_SC_PAGESIZE);
> -       dev->abi_version = abi_version;
> +       dev->abi_version = sysfs_dev->abi_ver;
>
>         dev->verbs_dev.sz = sizeof(*dev);
>         dev->verbs_dev.size_of_context =
> @@ -340,7 +331,10 @@ found:
>
>  static const struct verbs_device_ops mlx4_dev_ops = {
>         .name = "mlx4",
> -       .init_device = mlx4_driver_init,
> +       .match_min_abi_version = MLX4_UVERBS_MIN_ABI_VERSION,
> +       .match_max_abi_version = MLX4_UVERBS_MAX_ABI_VERSION,
> +       .match_device = mlx4_device_match,
> +       .alloc_device = mlx4_device_alloc,
>         .uninit_device = mlx4_uninit_device,
>         .init_context = mlx4_init_context,
>         .uninit_context = mlx4_uninit_context,
> diff --git a/providers/mlx5/mlx5.c b/providers/mlx5/mlx5.c
> index 68cca7cde97ef2..44cfd97b73cbbb 100644
> --- a/providers/mlx5/mlx5.c
> +++ b/providers/mlx5/mlx5.c
> @@ -1026,51 +1026,40 @@ static void mlx5_uninit_device(struct verbs_device *verbs_device)
>         free(dev);
>  }
>
> -static struct verbs_device *mlx5_driver_init(const char *uverbs_sys_path,
> -                                            int abi_version)
> +static bool mlx5_device_match(struct verbs_sysfs_dev *sysfs_dev)
>  {
> +       const char *uverbs_sys_path = sysfs_dev->sysfs_path;
>         char                    value[8];
> -       struct mlx5_device     *dev;
>         unsigned                vendor, device;
>         int                     i;
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
>                                 value, sizeof value) < 0)
> -               return NULL;
> +               return false;
>         sscanf(value, "%i", &vendor);
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
>                                 value, sizeof value) < 0)
> -               return NULL;
> +               return false;
>         sscanf(value, "%i", &device);
>
>         for (i = 0; i < sizeof hca_table / sizeof hca_table[0]; ++i)
>                 if (vendor == hca_table[i].vendor &&
>                     device == hca_table[i].device)
> -                       goto found;
> -
> -       return NULL;
> -
> -found:
> -       if (abi_version < MLX5_UVERBS_MIN_ABI_VERSION ||
> -           abi_version > MLX5_UVERBS_MAX_ABI_VERSION) {
> -               fprintf(stderr, PFX "Fatal: ABI version %d of %s is not supported "
> -                       "(min supported %d, max supported %d)\n",
> -                       abi_version, uverbs_sys_path,
> -                       MLX5_UVERBS_MIN_ABI_VERSION,
> -                       MLX5_UVERBS_MAX_ABI_VERSION);
> -               return NULL;
> -       }
> +                       return true;
> +       return false;
> +}
> +
> +static struct verbs_device *mlx5_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
> +{
> +       struct mlx5_device *dev;
>
>         dev = calloc(1, sizeof *dev);
> -       if (!dev) {
> -               fprintf(stderr, PFX "Fatal: couldn't allocate device for %s\n",
> -                       uverbs_sys_path);
> +       if (!dev)
>                 return NULL;
> -       }
>
>         dev->page_size   = sysconf(_SC_PAGESIZE);
> -       dev->driver_abi_ver = abi_version;
> +       dev->driver_abi_ver = sysfs_dev->abi_ver;
>
>         dev->verbs_dev.sz = sizeof(*dev);
>         dev->verbs_dev.size_of_context = sizeof(struct mlx5_context) -
> @@ -1081,7 +1070,10 @@ found:
>
>  static const struct verbs_device_ops mlx5_dev_ops = {
>         .name = "mlx5",
> -       .init_device = mlx5_driver_init,
> +       .match_min_abi_version = MLX5_UVERBS_MIN_ABI_VERSION,
> +       .match_max_abi_version = MLX5_UVERBS_MAX_ABI_VERSION,
> +       .match_device = mlx5_device_match,
> +       .alloc_device = mlx5_device_alloc,
>         .uninit_device = mlx5_uninit_device,
>         .init_context = mlx5_init_context,
>         .uninit_context = mlx5_cleanup_context,
> diff --git a/providers/mthca/mthca.c b/providers/mthca/mthca.c
> index 7194539b2d6ab1..521e5b9afe4f2b 100644
> --- a/providers/mthca/mthca.c
> +++ b/providers/mthca/mthca.c
> @@ -77,7 +77,7 @@
>           .device = PCI_DEVICE_ID_MELLANOX_##d,         \
>           .type = MTHCA_##t }
>
> -static struct {
> +static struct hca_ent {
>         unsigned                vendor;
>         unsigned                device;
>         enum mthca_hca_type     type;
> @@ -216,46 +216,44 @@ static void mthca_uninit_device(struct verbs_device *verbs_device)
>         free(dev);
>  }
>
> -static struct verbs_device *mthca_driver_init(const char *uverbs_sys_path,
> -                                           int abi_version)
> +static bool mthca_device_match(struct verbs_sysfs_dev *sysfs_dev)
>  {
> +       const char *uverbs_sys_path = sysfs_dev->sysfs_path;
>         char                    value[8];
> -       struct mthca_device    *dev;
>         unsigned                vendor, device;
>         int                     i;
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
>                                 value, sizeof value) < 0)
> -               return NULL;
> +               return false;
>         sscanf(value, "%i", &vendor);
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
>                                 value, sizeof value) < 0)
> -               return NULL;
> +               return false;
>         sscanf(value, "%i", &device);
>
>         for (i = 0; i < sizeof hca_table / sizeof hca_table[0]; ++i)
>                 if (vendor == hca_table[i].vendor &&
> -                   device == hca_table[i].device)
> -                       goto found;
> +                   device == hca_table[i].device) {
> +                       sysfs_dev->provider_data = &hca_table[i];
> +                       return true;
> +               }
>
> -       return NULL;
> +       return false;
> +}
>
> -found:
> -       if (abi_version > MTHCA_UVERBS_ABI_VERSION) {
> -               fprintf(stderr, PFX "Fatal: ABI version %d of %s is too new (expected %d)\n",
> -                       abi_version, uverbs_sys_path, MTHCA_UVERBS_ABI_VERSION);
> -               return NULL;
> -       }
> +static struct verbs_device *
> +mthca_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
> +{
> +       struct mthca_device    *dev;
> +       struct hca_ent *hca_ent = sysfs_dev->provider_data;
>
>         dev = calloc(1, sizeof(*dev));
> -       if (!dev) {
> -               fprintf(stderr, PFX "Fatal: couldn't allocate device for %s\n",
> -                       uverbs_sys_path);
> +       if (!dev)
>                 return NULL;
> -       }
>
> -       dev->hca_type    = hca_table[i].type;
> +       dev->hca_type    = hca_ent->type;
>         dev->page_size   = sysconf(_SC_PAGESIZE);
>
>         return &dev->ibv_dev;
> @@ -263,7 +261,10 @@ found:
>
>  static const struct verbs_device_ops mthca_dev_ops = {
>         .name = "mthca",
> -       .init_device = mthca_driver_init,
> +       .match_min_abi_version = 0,
> +       .match_max_abi_version = MTHCA_UVERBS_ABI_VERSION,
> +       .match_device = mthca_device_match,
> +       .alloc_device = mthca_device_alloc,
>         .uninit_device = mthca_uninit_device,
>         .alloc_context = mthca_alloc_context,
>         .free_context = mthca_free_context,
> diff --git a/providers/nes/nes_umain.c b/providers/nes/nes_umain.c
> index d02e010d2524a2..fc021a9196b6ad 100644
> --- a/providers/nes/nes_umain.c
> +++ b/providers/nes/nes_umain.c
> @@ -60,7 +60,7 @@ long int page_size;
>           .device = d,    \
>           .type = NETEFFECT_##t }
>
> -static struct {
> +static struct hca_ent {
>         unsigned vendor;
>         unsigned device;
>         enum nes_uhca_type type;
> @@ -191,37 +191,40 @@ static void nes_uninit_device(struct verbs_device *verbs_device)
>         free(dev);
>  }
>
> -/**
> - * nes_driver_init
> - */
> -static struct verbs_device *nes_driver_init(const char *uverbs_sys_path,
> -                                           int abi_version)
> +static bool nes_device_match(struct verbs_sysfs_dev *sysfs_dev)
>  {
> +       const char *uverbs_sys_path = sysfs_dev->sysfs_path;
>         char value[16];
> -       struct nes_udevice *dev;
>         unsigned vendor, device;
>         int i;
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
> -                       value, sizeof(value)) < 0) {
> -               return NULL;
> -       }
> +                       value, sizeof(value)) < 0)
> +               return false;
>         sscanf(value, "%i", &vendor);
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
> -                       value, sizeof(value)) < 0) {
> -               return NULL;
> -       }
> +                       value, sizeof(value)) < 0)
> +               return false;
>         sscanf(value, "%i", &device);
>
>         for (i = 0; i < sizeof hca_table / sizeof hca_table[0]; ++i)
>                 if (vendor == hca_table[i].vendor &&
> -                               device == hca_table[i].device)
> -                       goto found;
> +                   device == hca_table[i].device) {
> +                       sysfs_dev->provider_data = &hca_table[i];
> +                       return true;
> +               }
>
> -       return NULL;
> +       return false;
> +}
> +
> +static struct verbs_device *
> +nes_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
> +{
> +       struct nes_udevice *dev;
> +       struct hca_ent *hca_ent = sysfs_dev->provider_data;
> +       char value[16];
>
> -found:
>         if (ibv_read_sysfs_file("/sys/module/iw_nes", "parameters/debug_level",
>                         value, sizeof(value)) > 0) {
>                 sscanf(value, "%u", &nes_debug_level);
> @@ -231,12 +234,10 @@ found:
>         }
>
>         dev = calloc(1, sizeof(*dev));
> -       if (!dev) {
> -               nes_debug(NES_DBG_INIT, "Fatal: couldn't allocate device for libnes\n");
> +       if (!dev)
>                 return NULL;
> -       }
>
> -       dev->hca_type = hca_table[i].type;
> +       dev->hca_type = hca_ent->type;
>         dev->page_size = sysconf(_SC_PAGESIZE);
>
>         nes_debug(NES_DBG_INIT, "libnes initialized\n");
> @@ -246,7 +247,10 @@ found:
>
>  static const struct verbs_device_ops nes_udev_ops = {
>         .name = "nes",
> -       .init_device = nes_driver_init,
> +       .match_min_abi_version = 0,
> +       .match_max_abi_version = INT_MAX,
> +       .match_device = nes_device_match,
> +       .alloc_device = nes_device_alloc,
>         .uninit_device = nes_uninit_device,
>         .alloc_context = nes_ualloc_context,
>         .free_context = nes_ufree_context,
> diff --git a/providers/ocrdma/ocrdma_main.c b/providers/ocrdma/ocrdma_main.c
> index 09c00d21ce2af6..f08a49fb73e021 100644
> --- a/providers/ocrdma/ocrdma_main.c
> +++ b/providers/ocrdma/ocrdma_main.c
> @@ -168,50 +168,39 @@ static void ocrdma_free_context(struct ibv_context *ibctx)
>         free(ctx);
>  }
>
> -/**
> - * ocrdma_driver_init
> - */
> -static struct verbs_device *ocrdma_driver_init(const char *uverbs_sys_path,
> -                                              int abi_version)
> +static bool ocrdma_device_match(struct verbs_sysfs_dev *sysfs_dev)
>  {
> -
> +       const char *uverbs_sys_path = sysfs_dev->sysfs_path;
>         char value[16];
> -       struct ocrdma_device *dev;
>         unsigned vendor, device;
>         int i;
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
> -                               value, sizeof(value)) < 0) {
> -               return NULL;
> -       }
> +                               value, sizeof(value)) < 0)
> +               return false;
>         sscanf(value, "%i", &vendor);
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
> -                               value, sizeof(value)) < 0) {
> -               return NULL;
> -       }
> +                               value, sizeof(value)) < 0)
> +               return false;
>         sscanf(value, "%i", &device);
>
>         for (i = 0; i < sizeof ucna_table / sizeof ucna_table[0]; ++i) {
>                 if (vendor == ucna_table[i].vendor &&
>                     device == ucna_table[i].device)
> -                       goto found;
> -       }
> -       return NULL;
> -found:
> -       if (abi_version != OCRDMA_ABI_VERSION) {
> -               fprintf(stderr,
> -                 "Fatal: libocrdma ABI version %d of %s is not supported.\n",
> -                 abi_version, uverbs_sys_path);
> -               return NULL;
> +                       return true;
>         }
> +       return false;
> +}
> +
> +static struct verbs_device *
> +ocrdma_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
> +{
> +       struct ocrdma_device *dev;
>
>         dev = calloc(1, sizeof(*dev));
> -       if (!dev) {
> -               ocrdma_err("%s() Fatal: fail allocate device for libocrdma\n",
> -                          __func__);
> +       if (!dev)
>                 return NULL;
> -       }
>
>         dev->qp_tbl = malloc(OCRDMA_MAX_QP * sizeof(struct ocrdma_qp *));
>         if (!dev->qp_tbl)
> @@ -227,7 +216,10 @@ qp_err:
>
>  static const struct verbs_device_ops ocrdma_dev_ops = {
>         .name = "ocrdma",
> -       .init_device = ocrdma_driver_init,
> +       .match_min_abi_version = OCRDMA_ABI_VERSION,
> +       .match_max_abi_version = OCRDMA_ABI_VERSION,
> +       .match_device = ocrdma_device_match,
> +       .alloc_device = ocrdma_device_alloc,
>         .uninit_device = ocrdma_uninit_device,
>         .alloc_context = ocrdma_alloc_context,
>         .free_context = ocrdma_free_context,
> diff --git a/providers/qedr/qelr_main.c b/providers/qedr/qelr_main.c
> index 0be4a8c82a1e05..4d1b92f40a413a 100644
> --- a/providers/qedr/qelr_main.c
> +++ b/providers/qedr/qelr_main.c
> @@ -227,53 +227,50 @@ static void qelr_free_context(struct ibv_context *ibctx)
>         free(ctx);
>  }
>
> -static struct verbs_device *qelr_driver_init(const char *uverbs_sys_path,
> -                                            int abi_version)
> +static bool qedr_device_match(struct verbs_sysfs_dev *sysfs_dev)
>  {
> +       const char *uverbs_sys_path = sysfs_dev->sysfs_path;
>         char value[16];
> -       struct qelr_device *dev;
>         unsigned int vendor, device;
>         int i;
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
>                                 value, sizeof(value)) < 0)
> -               return NULL;
> +               return false;
>
>         sscanf(value, "%i", &vendor);
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
>                                 value, sizeof(value)) < 0)
> -               return NULL;
> +               return false;
>
>         sscanf(value, "%i", &device);
>
>         for (i = 0; i < sizeof(hca_table) / sizeof(hca_table[0]); ++i)
>                 if (vendor == hca_table[i].vendor &&
>                     device == hca_table[i].device)
> -                       goto found;
> +                       return true;
>
> -       return NULL;
> -found:
> -       if (abi_version != QELR_ABI_VERSION) {
> -               fprintf(stderr,
> -                       "Fatal: libqedr ABI version %d of %s is not supported.\n",
> -                       abi_version, uverbs_sys_path);
> -               return NULL;
> -       }
> +       return false;
> +}
> +
> +static struct verbs_device *qedr_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
> +{
> +       struct qelr_device *dev;
>
>         dev = calloc(1, sizeof(*dev));
> -       if (!dev) {
> -               qelr_err("%s() Fatal: fail allocate device for libqedr\n",
> -                        __func__);
> +       if (!dev)
>                 return NULL;
> -       }
>
>         return &dev->ibv_dev;
>  }
>
>  static const struct verbs_device_ops qelr_dev_ops = {
>         .name = "qelr",
> -       .init_device = qelr_driver_init,
> +       .match_min_abi_version = QELR_ABI_VERSION,
> +       .match_max_abi_version = QELR_ABI_VERSION,
> +       .match_device = qedr_device_match,
> +       .alloc_device = qedr_device_alloc,
>         .uninit_device = qelr_uninit_device,
>         .alloc_context = qelr_alloc_context,
>         .free_context = qelr_free_context,
> diff --git a/providers/rxe/rxe.c b/providers/rxe/rxe.c
> index 655800ec3410fd..d9857aac70d745 100644
> --- a/providers/rxe/rxe.c
> +++ b/providers/rxe/rxe.c
> @@ -893,36 +893,40 @@ static void rxe_uninit_device(struct verbs_device *verbs_device)
>         free(dev);
>  }
>
> -static struct verbs_device *rxe_driver_init(const char *uverbs_sys_path,
> -                                           int abi_version)
> +static bool rxe_device_match(struct verbs_sysfs_dev *sysfs_dev)
>  {
> -       struct rxe_device *dev;
> +       const char *uverbs_sys_path = sysfs_dev->sysfs_path;
>         char value[16];
>
>         /* make sure it is a rxe device */
>         if (ibv_read_sysfs_file(uverbs_sys_path, "ibdev",
>                                 value, sizeof(value)) < 0)
> -               return NULL;
> +               return false;
>
>         if (strncmp(value, "rxe", 3))
> -               return NULL;
> +               return false;
> +
> +       return true;
> +}
>
> +static struct verbs_device *rxe_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
> +{
> +       struct rxe_device *dev;
>         dev = calloc(1, sizeof(*dev));
> -       if (!dev) {
> -               fprintf(stderr,
> -                       "rxe: Fatal: couldn't allocate device for %s\n",
> -                       uverbs_sys_path);
> +       if (!dev)
>                 return NULL;
> -       }
>
> -       dev->abi_version = abi_version;
> +       dev->abi_version = sysfs_dev->abi_ver;
>
>         return &dev->ibv_dev;
>  }
>
>  static const struct verbs_device_ops rxe_dev_ops = {
>         .name = "rxe",
> -       .init_device = rxe_driver_init,
> +       .match_min_abi_version = 0,
> +       .match_max_abi_version = INT_MAX,
> +       .match_device = rxe_device_match,
> +       .alloc_device = rxe_device_alloc,
>         .uninit_device = rxe_uninit_device,
>         .alloc_context = rxe_alloc_context,
>         .free_context = rxe_free_context,
> diff --git a/providers/vmw_pvrdma/pvrdma_main.c b/providers/vmw_pvrdma/pvrdma_main.c
> index 75b9296c6e24e3..9bcf2ddd172afb 100644
> --- a/providers/vmw_pvrdma/pvrdma_main.c
> +++ b/providers/vmw_pvrdma/pvrdma_main.c
> @@ -169,64 +169,49 @@ static void pvrdma_uninit_device(struct verbs_device *verbs_device)
>         free(dev);
>  }
>
> -static struct pvrdma_device *pvrdma_driver_init_shared(
> -                                               const char *uverbs_sys_path,
> -                                               int abi_version)
> +static bool pvrdma_device_match(struct verbs_sysfs_dev *sysfs_dev)
>  {
> -       struct pvrdma_device *dev;
> +       const char *uverbs_sys_path = sysfs_dev->sysfs_path;
>         char value[8];
>         unsigned int vendor_id, device_id;
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
>                                 value, sizeof(value)) < 0)
> -               return NULL;
> +               return false;
>         vendor_id = strtol(value, NULL, 16);
>
>         if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
>                                 value, sizeof(value)) < 0)
> -               return NULL;
> +               return false;
>         device_id = strtol(value, NULL, 16);
>
>         if (vendor_id != PCI_VENDOR_ID_VMWARE ||
>             device_id != PCI_DEVICE_ID_VMWARE_PVRDMA)
> -               return NULL;
> +               return false;
> +       return true;
> +}
>
> -       /* We support only a single ABI version for now. */
> -       if (abi_version != PVRDMA_UVERBS_ABI_VERSION) {
> -               fprintf(stderr, PFX "ABI version %d of %s is not "
> -                       "supported (supported %d)\n",
> -                       abi_version, uverbs_sys_path,
> -                       PVRDMA_UVERBS_ABI_VERSION);
> -               return NULL;
> -       }
> +static struct verbs_device *
> +pvrdma_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
> +{
> +       struct pvrdma_device *dev;
>
>         dev = calloc(1, sizeof(*dev));
> -       if (!dev) {
> -               fprintf(stderr, PFX "couldn't allocate device for %s\n",
> -                       uverbs_sys_path);
> +       if (!dev)
>                 return NULL;
> -       }
>
> -       dev->abi_version = abi_version;
> +       dev->abi_version = sysfs_dev->abi_ver;
>         dev->page_size   = sysconf(_SC_PAGESIZE);
>
> -       return dev;
> -}
> -
> -static struct verbs_device *pvrdma_driver_init(const char *uverbs_sys_path,
> -                                              int abi_version)
> -{
> -       struct pvrdma_device *dev = pvrdma_driver_init_shared(uverbs_sys_path,
> -                                                             abi_version);
> -       if (!dev)
> -               return NULL;
> -
>         return &dev->ibv_dev;
>  }
>
>  static const struct verbs_device_ops pvrdma_dev_ops = {
>         .name = "pvrdma",
> -       .init_device = pvrdma_driver_init,
> +       .match_min_abi_version = PVRDMA_UVERBS_ABI_VERSION,
> +       .match_max_abi_version = PVRDMA_UVERBS_ABI_VERSION,
> +       .match_device = pvrdma_device_match,
> +       .alloc_device = pvrdma_device_alloc,
>         .uninit_device = pvrdma_uninit_device,
>         .alloc_context = pvrdma_alloc_context,
>         .free_context  = pvrdma_free_context,
> --
> 2.7.4
>
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Patch

diff --git a/providers/bnxt_re/main.c b/providers/bnxt_re/main.c
index d2c2a6847e3c71..c83baacbb9f749 100644
--- a/providers/bnxt_re/main.c
+++ b/providers/bnxt_re/main.c
@@ -174,43 +174,38 @@  static void bnxt_re_uninit_context(struct verbs_device *vdev,
 	}
 }
 
-static struct verbs_device *bnxt_re_driver_init(const char *uverbs_sys_path,
-						int abi_version)
+static bool bnxt_re_device_match(struct verbs_sysfs_dev *sysfs_dev)
 {
+	const char *uverbs_sys_path = sysfs_dev->sysfs_path;
 	char value[10];
-	struct bnxt_re_dev *dev;
 	unsigned int vendor, device;
 	int i;
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
 				value, sizeof(value)) < 0)
-		return NULL;
+		return false;
 	vendor = strtol(value, NULL, 16);
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
 				value, sizeof(value)) < 0)
-		return NULL;
+		return false;
 	device = strtol(value, NULL, 16);
 
 	for (i = 0; i < sizeof(cna_table) / sizeof(cna_table[0]); ++i)
 		if (vendor == cna_table[i].vendor &&
 		    device == cna_table[i].device)
-			goto found;
-	return NULL;
-found:
-	if (abi_version != BNXT_RE_ABI_VERSION) {
-		fprintf(stderr, DEV "FATAL: Max supported ABI of %s is %d "
-			"check for the latest version of kernel driver and"
-			"user library\n", uverbs_sys_path, abi_version);
-		return NULL;
-	}
+			return true;
+	return false;
+}
+
+static struct verbs_device *
+bnxt_re_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
+{
+	struct bnxt_re_dev *dev;
 
 	dev = calloc(1, sizeof(*dev));
-	if (!dev) {
-		fprintf(stderr, DEV "Failed to allocate device for %s\n",
-			uverbs_sys_path);
+	if (!dev)
 		return NULL;
-	}
 
 	dev->vdev.sz = sizeof(*dev);
 	dev->vdev.size_of_context =
@@ -221,7 +216,10 @@  found:
 
 static const struct verbs_device_ops bnxt_re_dev_ops = {
 	.name = "bnxt_re",
-	.init_device = bnxt_re_driver_init,
+	.match_min_abi_version = BNXT_RE_ABI_VERSION,
+	.match_max_abi_version = BNXT_RE_ABI_VERSION,
+	.match_device = bnxt_re_device_match,
+	.alloc_device = bnxt_re_device_alloc,
 	.init_context = bnxt_re_init_context,
 	.uninit_context = bnxt_re_uninit_context,
 };
diff --git a/providers/cxgb3/iwch.c b/providers/cxgb3/iwch.c
index c2423a7ee2cc32..7eb283bd9a89e1 100644
--- a/providers/cxgb3/iwch.c
+++ b/providers/cxgb3/iwch.c
@@ -61,7 +61,7 @@ 
 	  .device = PCI_DEVICE_ID_CHELSIO_##d,		\
 	  .type = CHELSIO_##t }
 
-static struct {
+static struct hca_ent {
 	unsigned vendor;
 	unsigned device;
 	enum iwch_hca_type type;
@@ -173,30 +173,31 @@  static void iwch_uninit_device(struct verbs_device *verbs_device)
 	free(dev);
 }
 
-static struct verbs_device *cxgb3_driver_init(const char *uverbs_sys_path,
-					      int abi_version)
+static bool iwch_device_match(struct verbs_sysfs_dev *sysfs_dev)
 {
-	char devstr[IBV_SYSFS_PATH_MAX], ibdev[16], value[32], *cp;
-	struct iwch_device *dev;
+	const char *uverbs_sys_path = sysfs_dev->sysfs_path;
+	char value[32], *cp;
 	unsigned vendor, device, fw_maj, fw_min;
 	int i;
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
 				value, sizeof value) < 0)
-		return NULL;
+		return false;
 	sscanf(value, "%i", &vendor);
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
 				value, sizeof value) < 0)
-		return NULL;
+		return false;
 	sscanf(value, "%i", &device);
 
 	for (i = 0; i < sizeof hca_table / sizeof hca_table[0]; ++i)
 		if (vendor == hca_table[i].vendor &&
-		    device == hca_table[i].device)
+		    device == hca_table[i].device) {
+			sysfs_dev->provider_data = &hca_table[i];
 			goto found;
+		}
 
-	return NULL;
+	return false;
 
 found:
 
@@ -204,15 +205,9 @@  found:
 	 * Verify that the firmware major number matches.  Major number
 	 * mismatches are fatal.  Minor number mismatches are tolerated.
 	 */
-	if (ibv_read_sysfs_file(uverbs_sys_path, "ibdev", 
-				ibdev, sizeof ibdev) < 0)
-		return NULL;
-
-	memset(devstr, 0, sizeof devstr);
-	snprintf(devstr, sizeof devstr, "%s/class/infiniband/%s", 
-		 ibv_get_sysfs_path(), ibdev);
-	if (ibv_read_sysfs_file(devstr, "fw_ver", value, sizeof value) < 0)
-		return NULL;
+	if (ibv_read_sysfs_file(sysfs_dev->ibdev_path, "fw_ver", value,
+				sizeof(value)) < 0)
+		return false;
 
 	cp = strtok(value+1, ".");
 	sscanf(cp, "%i", &fw_maj);
@@ -224,7 +219,7 @@  found:
 			"Firmware major number is %u and libcxgb3 needs %u.\n",
 			fw_maj, FW_MAJ);	
 		fflush(stderr);
-		return NULL;
+		return false;
 	}
 
 	DBGLOG("libcxgb3");
@@ -236,25 +231,21 @@  found:
 		fflush(stderr);
 	}
 
-	if (abi_version > ABI_VERS) {
-		PDBG("libcxgb3: ABI version mismatch.  "
-			"Kernel driver ABI is %u and libcxgb3 needs <= %u.\n",
-			abi_version, ABI_VERS);	
-		fflush(stderr);
-		return NULL;
-	}
+	return true;
+}
 
-	PDBG("%s found vendor %d device %d type %d\n", 
-	     __FUNCTION__, vendor, device, hca_table[i].type);
+static struct verbs_device *iwch_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
+{
+	struct iwch_device *dev;
+	struct hca_ent *hca_ent = sysfs_dev->provider_data;
 
 	dev = calloc(1, sizeof(*dev));
-	if (!dev) {
+	if (!dev)
 		return NULL;
-	}
 
 	pthread_spin_init(&dev->lock, PTHREAD_PROCESS_PRIVATE);
-	dev->hca_type = hca_table[i].type;
-	dev->abi_version = abi_version;
+	dev->hca_type = hca_ent->type;
+	dev->abi_version = sysfs_dev->abi_ver;
 
 	iwch_page_size = sysconf(_SC_PAGESIZE);
 	iwch_page_shift = long_log2(iwch_page_size);
@@ -285,7 +276,10 @@  err1:
 
 static const struct verbs_device_ops iwch_dev_ops = {
 	.name = "cxgb3",
-	.init_device = cxgb3_driver_init,
+	.match_min_abi_version = 0,
+	.match_max_abi_version = ABI_VERS,
+	.match_device = iwch_device_match,
+	.alloc_device = iwch_device_alloc,
 	.uninit_device = iwch_uninit_device,
 	.alloc_context = iwch_alloc_context,
 	.free_context = iwch_free_context,
diff --git a/providers/cxgb4/dev.c b/providers/cxgb4/dev.c
index 492b3978995607..43c5a3c97bc864 100644
--- a/providers/cxgb4/dev.c
+++ b/providers/cxgb4/dev.c
@@ -49,7 +49,7 @@ 
  * Macros needed to support the PCI Device ID Table ...
  */
 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_BEGIN \
-	static struct { \
+	static struct hca_ent { \
 		unsigned vendor; \
 		unsigned device; \
 	} hca_table[] = {
@@ -399,47 +399,40 @@  void dump_state(void)
  */
 int c4iw_abi_version = 1;
 
-static struct verbs_device *cxgb4_driver_init(const char *uverbs_sys_path,
-					      int abi_version)
+static bool c4iw_device_match(struct verbs_sysfs_dev *sysfs_dev)
 {
-	char devstr[IBV_SYSFS_PATH_MAX], ibdev[16], value[32], *cp;
-	struct c4iw_dev *dev;
+	const char *uverbs_sys_path = sysfs_dev->sysfs_path;
+	char value[32], *cp;
 	unsigned vendor, device, fw_maj, fw_min;
 	int i;
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
 				value, sizeof value) < 0)
-		return NULL;
+		return false;
 	sscanf(value, "%i", &vendor);
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
 				value, sizeof value) < 0)
-		return NULL;
+		return false;
 	sscanf(value, "%i", &device);
 
 	for (i = 0; i < sizeof hca_table / sizeof hca_table[0]; ++i)
 		if (vendor == hca_table[i].vendor &&
-		    device == hca_table[i].device)
+		    device == hca_table[i].device) {
+			sysfs_dev->provider_data = &hca_table[i];
 			goto found;
+		}
 
-	return NULL;
+	return false;
 
 found:
-	c4iw_abi_version = abi_version;	
-
 	/*
 	 * Verify that the firmware major number matches.  Major number
 	 * mismatches are fatal.  Minor number mismatches are tolerated.
 	 */
-	if (ibv_read_sysfs_file(uverbs_sys_path, "ibdev",
-				ibdev, sizeof ibdev) < 0)
-		return NULL;
-
-	memset(devstr, 0, sizeof devstr);
-	snprintf(devstr, sizeof devstr, "%s/class/infiniband/%s",
-		 ibv_get_sysfs_path(), ibdev);
-	if (ibv_read_sysfs_file(devstr, "fw_ver", value, sizeof value) < 0)
-		return NULL;
+	if (ibv_read_sysfs_file(sysfs_dev->ibdev_path, "fw_ver", value,
+				sizeof(value)) < 0)
+		return false;
 
 	cp = strtok(value+1, ".");
 	sscanf(cp, "%i", &fw_maj);
@@ -451,7 +444,7 @@  found:
 			"Firmware major number is %u and libcxgb4 needs %u.\n",
 			fw_maj, FW_MAJ);
 		fflush(stderr);
-		return NULL;
+		return false;
 	}
 
 	DBGLOG("libcxgb4");
@@ -462,22 +455,30 @@  found:
 			fw_min, FW_MIN);
 		fflush(stderr);
 	}
+	return true;
+}
 
-	PDBG("%s found vendor %d device %d type %d\n",
-	     __FUNCTION__, vendor, device, CHELSIO_CHIP_VERSION(hca_table[i].device >> 8));
+static struct verbs_device *c4iw_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
+{
+	struct c4iw_dev *dev;
+	struct hca_ent *hca_ent = sysfs_dev->provider_data;
+
+	c4iw_page_size = sysconf(_SC_PAGESIZE);
+	c4iw_page_shift = long_log2(c4iw_page_size);
+	c4iw_page_mask = ~(c4iw_page_size - 1);
 
 	c4iw_page_size = sysconf(_SC_PAGESIZE);
 	c4iw_page_shift = long_log2(c4iw_page_size);
 	c4iw_page_mask = ~(c4iw_page_size - 1);
 
 	dev = calloc(1, sizeof *dev);
-	if (!dev) {
+	if (!dev)
 		return NULL;
-	}
 
 	pthread_spin_init(&dev->lock, PTHREAD_PROCESS_PRIVATE);
-	dev->chip_version = CHELSIO_CHIP_VERSION(hca_table[i].device >> 8);
-	dev->abi_version = abi_version;
+	c4iw_abi_version = sysfs_dev->abi_ver;
+	dev->chip_version = CHELSIO_CHIP_VERSION(hca_ent->device >> 8);
+	dev->abi_version = sysfs_dev->abi_ver;
 	list_node_init(&dev->list);
 
 	PDBG("%s device claimed\n", __FUNCTION__);
@@ -514,7 +515,10 @@  found:
 
 static const struct verbs_device_ops c4iw_dev_ops = {
 	.name = "cxgb4",
-	.init_device = cxgb4_driver_init,
+	.match_min_abi_version = 0,
+	.match_max_abi_version = INT_MAX,
+	.match_device = c4iw_device_match,
+	.alloc_device = c4iw_device_alloc,
 	.uninit_device = c4iw_uninit_device,
 	.alloc_context = c4iw_alloc_context,
 	.free_context = c4iw_free_context,
diff --git a/providers/hfi1verbs/hfiverbs.c b/providers/hfi1verbs/hfiverbs.c
index 247831eb211804..5bb436593517e1 100644
--- a/providers/hfi1verbs/hfiverbs.c
+++ b/providers/hfi1verbs/hfiverbs.c
@@ -180,47 +180,50 @@  static void hf11_uninit_device(struct verbs_device *verbs_device)
 	free(dev);
 }
 
-static struct verbs_device *hfi1_driver_init(const char *uverbs_sys_path,
-					     int abi_version)
+static bool hfi1_device_match(struct verbs_sysfs_dev *sysfs_dev)
 {
+	const char *uverbs_sys_path = sysfs_dev->sysfs_path;
 	char			value[8];
-	struct hfi1_device    *dev;
 	unsigned                vendor, device;
 	int                     i;
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
 				value, sizeof value) < 0)
-		return NULL;
+		return false;
 	sscanf(value, "%i", &vendor);
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
 				value, sizeof value) < 0)
-		return NULL;
+		return false;
 	sscanf(value, "%i", &device);
 
 	for (i = 0; i < sizeof hca_table / sizeof hca_table[0]; ++i)
 		if (vendor == hca_table[i].vendor &&
 		    device == hca_table[i].device)
-			goto found;
+			return true;
 
-	return NULL;
+	return false;
+}
+
+static struct verbs_device *hfi1_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
+{
+	struct hfi1_device    *dev;
 
-found:
 	dev = calloc(1, sizeof(*dev));
-	if (!dev) {
-		fprintf(stderr, PFX "Fatal: couldn't allocate device for %s\n",
-			uverbs_sys_path);
+	if (!dev)
 		return NULL;
-	}
 
-	dev->abi_version = abi_version;
+	dev->abi_version = sysfs_dev->abi_ver;
 
 	return &dev->ibv_dev;
 }
 
 static const struct verbs_device_ops hfi1_dev_ops = {
 	.name = "hfi1verbs",
-	.init_device = hfi1_driver_init,
+	.match_min_abi_version = 0,
+	.match_max_abi_version = INT_MAX,
+	.match_device = hfi1_device_match,
+	.alloc_device = hfi1_device_alloc,
 	.uninit_device  = hf11_uninit_device,
 	.alloc_context = hfi1_alloc_context,
 	.free_context = hfi1_free_context,
diff --git a/providers/hns/hns_roce_u.c b/providers/hns/hns_roce_u.c
index fe2d009ebe3737..88389721811fce 100644
--- a/providers/hns/hns_roce_u.c
+++ b/providers/hns/hns_roce_u.c
@@ -44,20 +44,18 @@ 
 #define HID_LEN			15
 #define DEV_MATCH_LEN		128
 
-static const struct {
-	char	 hid[HID_LEN];
-	void	 *data;
-	int	 version;
-} acpi_table[] = {
+struct hca_ent {
+	const char *str;
+	struct hns_roce_u_hw *data;
+	int version;
+};
+
+static const struct hca_ent acpi_table[] = {
 	 {"acpi:HISI00D1:", &hns_roce_u_hw_v1, HNS_ROCE_HW_VER1},
 	 {},
 };
 
-static const struct {
-	char	 compatible[DEV_MATCH_LEN];
-	void	 *data;
-	int	 version;
-} dt_table[] = {
+static const struct hca_ent dt_table[] = {
 	{"hisilicon,hns-roce-v1", &hns_roce_u_hw_v1, HNS_ROCE_HW_VER1},
 	{},
 };
@@ -180,52 +178,53 @@  static void hns_uninit_device(struct verbs_device *verbs_device)
 	free(dev);
 }
 
-static struct verbs_device *hns_roce_driver_init(const char *uverbs_sys_path,
-						 int abi_version)
+static bool hns_device_match(struct verbs_sysfs_dev *sysfs_dev)
 {
-	struct hns_roce_device  *dev;
+	const char *uverbs_sys_path = sysfs_dev->sysfs_path;
 	char			 value[128];
 	int			 i;
-	void			 *u_hw;
-	int			 hw_version;
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/modalias",
 				value, sizeof(value)) > 0)
 		for (i = 0; i < sizeof(acpi_table) / sizeof(acpi_table[0]); ++i)
-			if (!strcmp(value, acpi_table[i].hid)) {
-				u_hw = acpi_table[i].data;
-				hw_version = acpi_table[i].version;
-				goto found;
+			if (!strcmp(value, acpi_table[i].str)) {
+				sysfs_dev->provider_data =
+				    (void *)&acpi_table[i];
+				return true;
 			}
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/of_node/compatible",
 				value, sizeof(value)) > 0)
 		for (i = 0; i < sizeof(dt_table) / sizeof(dt_table[0]); ++i)
-			if (!strcmp(value, dt_table[i].compatible)) {
-				u_hw = dt_table[i].data;
-				hw_version = dt_table[i].version;
-				goto found;
+			if (!strcmp(value, dt_table[i].str)) {
+				sysfs_dev->provider_data = (void *)&dt_table[i];
+				return true;
 			}
 
-	return NULL;
+	return false;
+}
+
+static struct verbs_device *hns_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
+{
+	struct hns_roce_device  *dev;
+	const struct hca_ent *hca_ent = sysfs_dev->provider_data;
 
-found:
 	dev = calloc(1, sizeof(*dev));
-	if (!dev) {
-		fprintf(stderr, PFX "Fatal: couldn't allocate device for %s\n",
-			uverbs_sys_path);
+	if (!dev)
 		return NULL;
-	}
 
-	dev->u_hw = (struct hns_roce_u_hw *)u_hw;
-	dev->hw_version = hw_version;
+	dev->u_hw = hca_ent->data;
+	dev->hw_version = hca_ent->version;
 	dev->page_size   = sysconf(_SC_PAGESIZE);
 	return &dev->ibv_dev;
 }
 
 static const struct verbs_device_ops hns_roce_dev_ops = {
 	.name = "hns",
-	.init_device = hns_roce_driver_init,
+	.match_min_abi_version = 0,
+	.match_max_abi_version = INT_MAX,
+	.match_device = hns_device_match,
+	.alloc_device = hns_device_alloc,
 	.uninit_device = hns_uninit_device,
 	.alloc_context = hns_roce_alloc_context,
 	.free_context = hns_roce_free_context,
diff --git a/providers/i40iw/i40iw_umain.c b/providers/i40iw/i40iw_umain.c
index 90d37651d1f702..bcba6158e60e40 100644
--- a/providers/i40iw/i40iw_umain.c
+++ b/providers/i40iw/i40iw_umain.c
@@ -55,7 +55,7 @@ 
 	  .device = d,		\
 	  .type = INTEL_ ## t }
 
-static struct {
+static struct hca_ent {
 	unsigned int vendor;
 	unsigned int device;
 	enum i40iw_uhca_type type;
@@ -220,44 +220,53 @@  static void i40iw_uninit_device(struct verbs_device *verbs_device)
  * @uverbs_sys_path: sys path
  * @abi_version: not used
  */
-static struct verbs_device *i40iw_driver_init(const char *uverbs_sys_path,
-					      int abi_version)
+static bool i40iw_device_match(struct verbs_sysfs_dev *sysfs_dev)
 {
+	const char *uverbs_sys_path = sysfs_dev->sysfs_path;
 	char value[16];
-	struct i40iw_udevice *dev;
 	unsigned int vendor, device;
 	int i;
 
 	if ((ibv_read_sysfs_file(uverbs_sys_path, "device/vendor", value, sizeof(value)) < 0) ||
 	    (sscanf(value, "%i", &vendor) != 1))
-		return NULL;
+		return false;
 
 	if ((ibv_read_sysfs_file(uverbs_sys_path, "device/device", value, sizeof(value)) < 0) ||
 	    (sscanf(value, "%i", &device) != 1))
-		return NULL;
+		return false;
 
 	for (i = 0; i < sizeof(hca_table) / sizeof(hca_table[0]); ++i) {
 		if (vendor == hca_table[i].vendor &&
-		    device == hca_table[i].device)
-			goto found;
+		    device == hca_table[i].device) {
+			sysfs_dev->provider_data = &hca_table[i];
+			return true;
+		}
 	}
 
-	return NULL;
-found:
+	return false;
+}
+
+static struct verbs_device *
+i40iw_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
+{
+	struct i40iw_udevice *dev;
+	struct hca_ent *hca_ent = sysfs_dev->provider_data;
+
 	dev = calloc(1, sizeof(*dev));
-	if (!dev) {
-		fprintf(stderr, PFX "%s: failed to allocate memory for device object\n", __func__);
+	if (!dev)
 		return NULL;
-	}
 
-	dev->hca_type = hca_table[i].type;
+	dev->hca_type = hca_ent->type;
 	dev->page_size = I40IW_HW_PAGE_SIZE;
 	return &dev->ibv_dev;
 }
 
 static const struct verbs_device_ops i40iw_udev_ops = {
 	.name = "i40iw",
-	.init_device = i40iw_driver_init,
+	.match_min_abi_version = 0,
+	.match_max_abi_version = INT_MAX,
+	.match_device = i40iw_device_match,
+	.alloc_device = i40iw_device_alloc,
 	.uninit_device  = i40iw_uninit_device,
 	.alloc_context = i40iw_ualloc_context,
 	.free_context = i40iw_ufree_context,
diff --git a/providers/ipathverbs/ipathverbs.c b/providers/ipathverbs/ipathverbs.c
index ebdf5b828e1784..3c141263d8ff86 100644
--- a/providers/ipathverbs/ipathverbs.c
+++ b/providers/ipathverbs/ipathverbs.c
@@ -179,47 +179,51 @@  static void ipath_uninit_device(struct verbs_device *verbs_device)
 	free(dev);
 }
 
-static struct verbs_device *ipath_driver_init(const char *uverbs_sys_path,
-					      int abi_version)
+static bool ipath_device_match(struct verbs_sysfs_dev *sysfs_dev)
 {
+	const char *uverbs_sys_path = sysfs_dev->sysfs_path;
 	char			value[8];
-	struct ipath_device    *dev;
 	unsigned                vendor, device;
 	int                     i;
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
 				value, sizeof value) < 0)
-		return NULL;
+		return false;
 	sscanf(value, "%i", &vendor);
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
 				value, sizeof value) < 0)
-		return NULL;
+		return false;
 	sscanf(value, "%i", &device);
 
 	for (i = 0; i < sizeof hca_table / sizeof hca_table[0]; ++i)
 		if (vendor == hca_table[i].vendor &&
 		    device == hca_table[i].device)
-			goto found;
+			return true;
 
-	return NULL;
+	return false;
+}
+
+static struct verbs_device *
+ipath_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
+{
+	struct ipath_device    *dev;
 
-found:
 	dev = calloc(1, sizeof(*dev));
-	if (!dev) {
-		fprintf(stderr, PFX "Fatal: couldn't allocate device for %s\n",
-			uverbs_sys_path);
+	if (!dev)
 		return NULL;
-	}
 
-	dev->abi_version = abi_version;
+	dev->abi_version = sysfs_dev->abi_ver;
 
 	return &dev->ibv_dev;
 }
 
 static const struct verbs_device_ops ipath_dev_ops = {
 	.name = "ipathverbs",
-	.init_device = ipath_driver_init,
+	.match_min_abi_version = 0,
+	.match_max_abi_version = INT_MAX,
+	.match_device = ipath_device_match,
+	.alloc_device = ipath_device_alloc,
 	.uninit_device  = ipath_uninit_device,
 	.alloc_context = ipath_alloc_context,
 	.free_context = ipath_free_context,
diff --git a/providers/mlx4/mlx4.c b/providers/mlx4/mlx4.c
index 0eefa40af16d83..b52684a563b495 100644
--- a/providers/mlx4/mlx4.c
+++ b/providers/mlx4/mlx4.c
@@ -286,50 +286,41 @@  static void mlx4_uninit_device(struct verbs_device *verbs_device)
 	free(dev);
 }
 
-static struct verbs_device *mlx4_driver_init(const char *uverbs_sys_path, int abi_version)
+static bool mlx4_device_match(struct verbs_sysfs_dev *sysfs_dev)
 {
+	const char *uverbs_sys_path = sysfs_dev->sysfs_path;
 	char			value[8];
-	struct mlx4_device    *dev;
 	unsigned		vendor, device;
 	int			i;
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
 				value, sizeof value) < 0)
-		return NULL;
+		return false;
 	vendor = strtol(value, NULL, 16);
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
 				value, sizeof value) < 0)
-		return NULL;
+		return false;
 	device = strtol(value, NULL, 16);
 
 	for (i = 0; i < sizeof hca_table / sizeof hca_table[0]; ++i)
 		if (vendor == hca_table[i].vendor &&
 		    device == hca_table[i].device)
-			goto found;
-
-	return NULL;
-
-found:
-	if (abi_version < MLX4_UVERBS_MIN_ABI_VERSION ||
-	    abi_version > MLX4_UVERBS_MAX_ABI_VERSION) {
-		fprintf(stderr, PFX "Fatal: ABI version %d of %s is not supported "
-			"(min supported %d, max supported %d)\n",
-			abi_version, uverbs_sys_path,
-			MLX4_UVERBS_MIN_ABI_VERSION,
-			MLX4_UVERBS_MAX_ABI_VERSION);
-		return NULL;
-	}
+			return true;
+
+	return false;
+}
+
+static struct verbs_device *mlx4_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
+{
+	struct mlx4_device *dev;
 
 	dev = calloc(1, sizeof *dev);
-	if (!dev) {
-		fprintf(stderr, PFX "Fatal: couldn't allocate device for %s\n",
-			uverbs_sys_path);
+	if (!dev)
 		return NULL;
-	}
 
 	dev->page_size   = sysconf(_SC_PAGESIZE);
-	dev->abi_version = abi_version;
+	dev->abi_version = sysfs_dev->abi_ver;
 
 	dev->verbs_dev.sz = sizeof(*dev);
 	dev->verbs_dev.size_of_context =
@@ -340,7 +331,10 @@  found:
 
 static const struct verbs_device_ops mlx4_dev_ops = {
 	.name = "mlx4",
-	.init_device = mlx4_driver_init,
+	.match_min_abi_version = MLX4_UVERBS_MIN_ABI_VERSION,
+	.match_max_abi_version = MLX4_UVERBS_MAX_ABI_VERSION,
+	.match_device = mlx4_device_match,
+	.alloc_device = mlx4_device_alloc,
 	.uninit_device = mlx4_uninit_device,
 	.init_context = mlx4_init_context,
 	.uninit_context = mlx4_uninit_context,
diff --git a/providers/mlx5/mlx5.c b/providers/mlx5/mlx5.c
index 68cca7cde97ef2..44cfd97b73cbbb 100644
--- a/providers/mlx5/mlx5.c
+++ b/providers/mlx5/mlx5.c
@@ -1026,51 +1026,40 @@  static void mlx5_uninit_device(struct verbs_device *verbs_device)
 	free(dev);
 }
 
-static struct verbs_device *mlx5_driver_init(const char *uverbs_sys_path,
-					     int abi_version)
+static bool mlx5_device_match(struct verbs_sysfs_dev *sysfs_dev)
 {
+	const char *uverbs_sys_path = sysfs_dev->sysfs_path;
 	char			value[8];
-	struct mlx5_device     *dev;
 	unsigned		vendor, device;
 	int			i;
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
 				value, sizeof value) < 0)
-		return NULL;
+		return false;
 	sscanf(value, "%i", &vendor);
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
 				value, sizeof value) < 0)
-		return NULL;
+		return false;
 	sscanf(value, "%i", &device);
 
 	for (i = 0; i < sizeof hca_table / sizeof hca_table[0]; ++i)
 		if (vendor == hca_table[i].vendor &&
 		    device == hca_table[i].device)
-			goto found;
-
-	return NULL;
-
-found:
-	if (abi_version < MLX5_UVERBS_MIN_ABI_VERSION ||
-	    abi_version > MLX5_UVERBS_MAX_ABI_VERSION) {
-		fprintf(stderr, PFX "Fatal: ABI version %d of %s is not supported "
-			"(min supported %d, max supported %d)\n",
-			abi_version, uverbs_sys_path,
-			MLX5_UVERBS_MIN_ABI_VERSION,
-			MLX5_UVERBS_MAX_ABI_VERSION);
-		return NULL;
-	}
+			return true;
+	return false;
+}
+
+static struct verbs_device *mlx5_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
+{
+	struct mlx5_device *dev;
 
 	dev = calloc(1, sizeof *dev);
-	if (!dev) {
-		fprintf(stderr, PFX "Fatal: couldn't allocate device for %s\n",
-			uverbs_sys_path);
+	if (!dev)
 		return NULL;
-	}
 
 	dev->page_size   = sysconf(_SC_PAGESIZE);
-	dev->driver_abi_ver = abi_version;
+	dev->driver_abi_ver = sysfs_dev->abi_ver;
 
 	dev->verbs_dev.sz = sizeof(*dev);
 	dev->verbs_dev.size_of_context = sizeof(struct mlx5_context) -
@@ -1081,7 +1070,10 @@  found:
 
 static const struct verbs_device_ops mlx5_dev_ops = {
 	.name = "mlx5",
-	.init_device = mlx5_driver_init,
+	.match_min_abi_version = MLX5_UVERBS_MIN_ABI_VERSION,
+	.match_max_abi_version = MLX5_UVERBS_MAX_ABI_VERSION,
+	.match_device = mlx5_device_match,
+	.alloc_device = mlx5_device_alloc,
 	.uninit_device = mlx5_uninit_device,
 	.init_context = mlx5_init_context,
 	.uninit_context = mlx5_cleanup_context,
diff --git a/providers/mthca/mthca.c b/providers/mthca/mthca.c
index 7194539b2d6ab1..521e5b9afe4f2b 100644
--- a/providers/mthca/mthca.c
+++ b/providers/mthca/mthca.c
@@ -77,7 +77,7 @@ 
 	  .device = PCI_DEVICE_ID_MELLANOX_##d,		\
 	  .type = MTHCA_##t }
 
-static struct {
+static struct hca_ent {
 	unsigned		vendor;
 	unsigned		device;
 	enum mthca_hca_type	type;
@@ -216,46 +216,44 @@  static void mthca_uninit_device(struct verbs_device *verbs_device)
 	free(dev);
 }
 
-static struct verbs_device *mthca_driver_init(const char *uverbs_sys_path,
-					    int abi_version)
+static bool mthca_device_match(struct verbs_sysfs_dev *sysfs_dev)
 {
+	const char *uverbs_sys_path = sysfs_dev->sysfs_path;
 	char			value[8];
-	struct mthca_device    *dev;
 	unsigned                vendor, device;
 	int                     i;
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
 				value, sizeof value) < 0)
-		return NULL;
+		return false;
 	sscanf(value, "%i", &vendor);
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
 				value, sizeof value) < 0)
-		return NULL;
+		return false;
 	sscanf(value, "%i", &device);
 
 	for (i = 0; i < sizeof hca_table / sizeof hca_table[0]; ++i)
 		if (vendor == hca_table[i].vendor &&
-		    device == hca_table[i].device)
-			goto found;
+		    device == hca_table[i].device) {
+			sysfs_dev->provider_data = &hca_table[i];
+			return true;
+		}
 
-	return NULL;
+	return false;
+}
 
-found:
-	if (abi_version > MTHCA_UVERBS_ABI_VERSION) {
-		fprintf(stderr, PFX "Fatal: ABI version %d of %s is too new (expected %d)\n",
-			abi_version, uverbs_sys_path, MTHCA_UVERBS_ABI_VERSION);
-		return NULL;
-	}
+static struct verbs_device *
+mthca_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
+{
+	struct mthca_device    *dev;
+	struct hca_ent *hca_ent = sysfs_dev->provider_data;
 
 	dev = calloc(1, sizeof(*dev));
-	if (!dev) {
-		fprintf(stderr, PFX "Fatal: couldn't allocate device for %s\n",
-			uverbs_sys_path);
+	if (!dev)
 		return NULL;
-	}
 
-	dev->hca_type    = hca_table[i].type;
+	dev->hca_type    = hca_ent->type;
 	dev->page_size   = sysconf(_SC_PAGESIZE);
 
 	return &dev->ibv_dev;
@@ -263,7 +261,10 @@  found:
 
 static const struct verbs_device_ops mthca_dev_ops = {
 	.name = "mthca",
-	.init_device = mthca_driver_init,
+	.match_min_abi_version = 0,
+	.match_max_abi_version = MTHCA_UVERBS_ABI_VERSION,
+	.match_device = mthca_device_match,
+	.alloc_device = mthca_device_alloc,
 	.uninit_device = mthca_uninit_device,
 	.alloc_context = mthca_alloc_context,
 	.free_context = mthca_free_context,
diff --git a/providers/nes/nes_umain.c b/providers/nes/nes_umain.c
index d02e010d2524a2..fc021a9196b6ad 100644
--- a/providers/nes/nes_umain.c
+++ b/providers/nes/nes_umain.c
@@ -60,7 +60,7 @@  long int page_size;
 	  .device = d,    \
 	  .type = NETEFFECT_##t }
 
-static struct {
+static struct hca_ent {
 	unsigned vendor;
 	unsigned device;
 	enum nes_uhca_type type;
@@ -191,37 +191,40 @@  static void nes_uninit_device(struct verbs_device *verbs_device)
 	free(dev);
 }
 
-/**
- * nes_driver_init
- */
-static struct verbs_device *nes_driver_init(const char *uverbs_sys_path,
-					    int abi_version)
+static bool nes_device_match(struct verbs_sysfs_dev *sysfs_dev)
 {
+	const char *uverbs_sys_path = sysfs_dev->sysfs_path;
 	char value[16];
-	struct nes_udevice *dev;
 	unsigned vendor, device;
 	int i;
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
-			value, sizeof(value)) < 0) {
-		return NULL;
-	}
+			value, sizeof(value)) < 0)
+		return false;
 	sscanf(value, "%i", &vendor);
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
-			value, sizeof(value)) < 0) {
-		return NULL;
-	}
+			value, sizeof(value)) < 0)
+		return false;
 	sscanf(value, "%i", &device);
 
 	for (i = 0; i < sizeof hca_table / sizeof hca_table[0]; ++i)
 		if (vendor == hca_table[i].vendor &&
-				device == hca_table[i].device)
-			goto found;
+		    device == hca_table[i].device) {
+			sysfs_dev->provider_data = &hca_table[i];
+			return true;
+		}
 
-	return NULL;
+	return false;
+}
+
+static struct verbs_device *
+nes_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
+{
+	struct nes_udevice *dev;
+	struct hca_ent *hca_ent = sysfs_dev->provider_data;
+	char value[16];
 
-found:
 	if (ibv_read_sysfs_file("/sys/module/iw_nes", "parameters/debug_level",
 			value, sizeof(value)) > 0) {
 		sscanf(value, "%u", &nes_debug_level);
@@ -231,12 +234,10 @@  found:
 	}
 
 	dev = calloc(1, sizeof(*dev));
-	if (!dev) {
-		nes_debug(NES_DBG_INIT, "Fatal: couldn't allocate device for libnes\n");
+	if (!dev)
 		return NULL;
-	}
 
-	dev->hca_type = hca_table[i].type;
+	dev->hca_type = hca_ent->type;
 	dev->page_size = sysconf(_SC_PAGESIZE);
 
 	nes_debug(NES_DBG_INIT, "libnes initialized\n");
@@ -246,7 +247,10 @@  found:
 
 static const struct verbs_device_ops nes_udev_ops = {
 	.name = "nes",
-	.init_device = nes_driver_init,
+	.match_min_abi_version = 0,
+	.match_max_abi_version = INT_MAX,
+	.match_device = nes_device_match,
+	.alloc_device = nes_device_alloc,
 	.uninit_device = nes_uninit_device,
 	.alloc_context = nes_ualloc_context,
 	.free_context = nes_ufree_context,
diff --git a/providers/ocrdma/ocrdma_main.c b/providers/ocrdma/ocrdma_main.c
index 09c00d21ce2af6..f08a49fb73e021 100644
--- a/providers/ocrdma/ocrdma_main.c
+++ b/providers/ocrdma/ocrdma_main.c
@@ -168,50 +168,39 @@  static void ocrdma_free_context(struct ibv_context *ibctx)
 	free(ctx);
 }
 
-/**
- * ocrdma_driver_init
- */
-static struct verbs_device *ocrdma_driver_init(const char *uverbs_sys_path,
-					       int abi_version)
+static bool ocrdma_device_match(struct verbs_sysfs_dev *sysfs_dev)
 {
-
+	const char *uverbs_sys_path = sysfs_dev->sysfs_path;
 	char value[16];
-	struct ocrdma_device *dev;
 	unsigned vendor, device;
 	int i;
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
-				value, sizeof(value)) < 0) {
-		return NULL;
-	}
+				value, sizeof(value)) < 0)
+		return false;
 	sscanf(value, "%i", &vendor);
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
-				value, sizeof(value)) < 0) {
-		return NULL;
-	}
+				value, sizeof(value)) < 0)
+		return false;
 	sscanf(value, "%i", &device);
 
 	for (i = 0; i < sizeof ucna_table / sizeof ucna_table[0]; ++i) {
 		if (vendor == ucna_table[i].vendor &&
 		    device == ucna_table[i].device)
-			goto found;
-	}
-	return NULL;
-found:
-	if (abi_version != OCRDMA_ABI_VERSION) {
-		fprintf(stderr,
-		  "Fatal: libocrdma ABI version %d of %s is not supported.\n",
-		  abi_version, uverbs_sys_path);
-		return NULL;
+			return true;
 	}
+	return false;
+}
+
+static struct verbs_device *
+ocrdma_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
+{
+	struct ocrdma_device *dev;
 
 	dev = calloc(1, sizeof(*dev));
-	if (!dev) {
-		ocrdma_err("%s() Fatal: fail allocate device for libocrdma\n",
-			   __func__);
+	if (!dev)
 		return NULL;
-	}
 
 	dev->qp_tbl = malloc(OCRDMA_MAX_QP * sizeof(struct ocrdma_qp *));
 	if (!dev->qp_tbl)
@@ -227,7 +216,10 @@  qp_err:
 
 static const struct verbs_device_ops ocrdma_dev_ops = {
 	.name = "ocrdma",
-	.init_device = ocrdma_driver_init,
+	.match_min_abi_version = OCRDMA_ABI_VERSION,
+	.match_max_abi_version = OCRDMA_ABI_VERSION,
+	.match_device = ocrdma_device_match,
+	.alloc_device = ocrdma_device_alloc,
 	.uninit_device = ocrdma_uninit_device,
 	.alloc_context = ocrdma_alloc_context,
 	.free_context = ocrdma_free_context,
diff --git a/providers/qedr/qelr_main.c b/providers/qedr/qelr_main.c
index 0be4a8c82a1e05..4d1b92f40a413a 100644
--- a/providers/qedr/qelr_main.c
+++ b/providers/qedr/qelr_main.c
@@ -227,53 +227,50 @@  static void qelr_free_context(struct ibv_context *ibctx)
 	free(ctx);
 }
 
-static struct verbs_device *qelr_driver_init(const char *uverbs_sys_path,
-					     int abi_version)
+static bool qedr_device_match(struct verbs_sysfs_dev *sysfs_dev)
 {
+	const char *uverbs_sys_path = sysfs_dev->sysfs_path;
 	char value[16];
-	struct qelr_device *dev;
 	unsigned int vendor, device;
 	int i;
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
 				value, sizeof(value)) < 0)
-		return NULL;
+		return false;
 
 	sscanf(value, "%i", &vendor);
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
 				value, sizeof(value)) < 0)
-		return NULL;
+		return false;
 
 	sscanf(value, "%i", &device);
 
 	for (i = 0; i < sizeof(hca_table) / sizeof(hca_table[0]); ++i)
 		if (vendor == hca_table[i].vendor &&
 		    device == hca_table[i].device)
-			goto found;
+			return true;
 
-	return NULL;
-found:
-	if (abi_version != QELR_ABI_VERSION) {
-		fprintf(stderr,
-			"Fatal: libqedr ABI version %d of %s is not supported.\n",
-			abi_version, uverbs_sys_path);
-		return NULL;
-	}
+	return false;
+}
+
+static struct verbs_device *qedr_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
+{
+	struct qelr_device *dev;
 
 	dev = calloc(1, sizeof(*dev));
-	if (!dev) {
-		qelr_err("%s() Fatal: fail allocate device for libqedr\n",
-			 __func__);
+	if (!dev)
 		return NULL;
-	}
 
 	return &dev->ibv_dev;
 }
 
 static const struct verbs_device_ops qelr_dev_ops = {
 	.name = "qelr",
-	.init_device = qelr_driver_init,
+	.match_min_abi_version = QELR_ABI_VERSION,
+	.match_max_abi_version = QELR_ABI_VERSION,
+	.match_device = qedr_device_match,
+	.alloc_device = qedr_device_alloc,
 	.uninit_device = qelr_uninit_device,
 	.alloc_context = qelr_alloc_context,
 	.free_context = qelr_free_context,
diff --git a/providers/rxe/rxe.c b/providers/rxe/rxe.c
index 655800ec3410fd..d9857aac70d745 100644
--- a/providers/rxe/rxe.c
+++ b/providers/rxe/rxe.c
@@ -893,36 +893,40 @@  static void rxe_uninit_device(struct verbs_device *verbs_device)
 	free(dev);
 }
 
-static struct verbs_device *rxe_driver_init(const char *uverbs_sys_path,
-					    int abi_version)
+static bool rxe_device_match(struct verbs_sysfs_dev *sysfs_dev)
 {
-	struct rxe_device *dev;
+	const char *uverbs_sys_path = sysfs_dev->sysfs_path;
 	char value[16];
 
 	/* make sure it is a rxe device */
 	if (ibv_read_sysfs_file(uverbs_sys_path, "ibdev",
 				value, sizeof(value)) < 0)
-		return NULL;
+		return false;
 
 	if (strncmp(value, "rxe", 3))
-		return NULL;
+		return false;
+
+	return true;
+}
 
+static struct verbs_device *rxe_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
+{
+	struct rxe_device *dev;
 	dev = calloc(1, sizeof(*dev));
-	if (!dev) {
-		fprintf(stderr,
-			"rxe: Fatal: couldn't allocate device for %s\n",
-			uverbs_sys_path);
+	if (!dev)
 		return NULL;
-	}
 
-	dev->abi_version = abi_version;
+	dev->abi_version = sysfs_dev->abi_ver;
 
 	return &dev->ibv_dev;
 }
 
 static const struct verbs_device_ops rxe_dev_ops = {
 	.name = "rxe",
-	.init_device = rxe_driver_init,
+	.match_min_abi_version = 0,
+	.match_max_abi_version = INT_MAX,
+	.match_device = rxe_device_match,
+	.alloc_device = rxe_device_alloc,
 	.uninit_device = rxe_uninit_device,
 	.alloc_context = rxe_alloc_context,
 	.free_context = rxe_free_context,
diff --git a/providers/vmw_pvrdma/pvrdma_main.c b/providers/vmw_pvrdma/pvrdma_main.c
index 75b9296c6e24e3..9bcf2ddd172afb 100644
--- a/providers/vmw_pvrdma/pvrdma_main.c
+++ b/providers/vmw_pvrdma/pvrdma_main.c
@@ -169,64 +169,49 @@  static void pvrdma_uninit_device(struct verbs_device *verbs_device)
 	free(dev);
 }
 
-static struct pvrdma_device *pvrdma_driver_init_shared(
-						const char *uverbs_sys_path,
-						int abi_version)
+static bool pvrdma_device_match(struct verbs_sysfs_dev *sysfs_dev)
 {
-	struct pvrdma_device *dev;
+	const char *uverbs_sys_path = sysfs_dev->sysfs_path;
 	char value[8];
 	unsigned int vendor_id, device_id;
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/vendor",
 				value, sizeof(value)) < 0)
-		return NULL;
+		return false;
 	vendor_id = strtol(value, NULL, 16);
 
 	if (ibv_read_sysfs_file(uverbs_sys_path, "device/device",
 				value, sizeof(value)) < 0)
-		return NULL;
+		return false;
 	device_id = strtol(value, NULL, 16);
 
 	if (vendor_id != PCI_VENDOR_ID_VMWARE ||
 	    device_id != PCI_DEVICE_ID_VMWARE_PVRDMA)
-		return NULL;
+		return false;
+	return true;
+}
 
-	/* We support only a single ABI version for now. */
-	if (abi_version != PVRDMA_UVERBS_ABI_VERSION) {
-		fprintf(stderr, PFX "ABI version %d of %s is not "
-			"supported (supported %d)\n",
-			abi_version, uverbs_sys_path,
-			PVRDMA_UVERBS_ABI_VERSION);
-		return NULL;
-	}
+static struct verbs_device *
+pvrdma_device_alloc(struct verbs_sysfs_dev *sysfs_dev)
+{
+	struct pvrdma_device *dev;
 
 	dev = calloc(1, sizeof(*dev));
-	if (!dev) {
-		fprintf(stderr, PFX "couldn't allocate device for %s\n",
-			uverbs_sys_path);
+	if (!dev)
 		return NULL;
-	}
 
-	dev->abi_version = abi_version;
+	dev->abi_version = sysfs_dev->abi_ver;
 	dev->page_size   = sysconf(_SC_PAGESIZE);
 
-	return dev;
-}
-
-static struct verbs_device *pvrdma_driver_init(const char *uverbs_sys_path,
-					       int abi_version)
-{
-	struct pvrdma_device *dev = pvrdma_driver_init_shared(uverbs_sys_path,
-							      abi_version);
-	if (!dev)
-		return NULL;
-
 	return &dev->ibv_dev;
 }
 
 static const struct verbs_device_ops pvrdma_dev_ops = {
 	.name = "pvrdma",
-	.init_device = pvrdma_driver_init,
+	.match_min_abi_version = PVRDMA_UVERBS_ABI_VERSION,
+	.match_max_abi_version = PVRDMA_UVERBS_ABI_VERSION,
+	.match_device = pvrdma_device_match,
+	.alloc_device = pvrdma_device_alloc,
 	.uninit_device = pvrdma_uninit_device,
 	.alloc_context = pvrdma_alloc_context,
 	.free_context  = pvrdma_free_context,