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Date: Fri, 22 Jan 2021 17:48:09 -0600
From: Shiraz Saleem <shiraz.saleem@...el.com>
To: dledford@...hat.com, jgg@...dia.com, kuba@...nel.org,
davem@...emloft.net
Cc: linux-rdma@...r.kernel.org, gregkh@...uxfoundation.org,
netdev@...r.kernel.org, david.m.ertman@...el.com,
anthony.l.nguyen@...el.com
Subject: [PATCH 04/22] ice: Register auxiliary device to provide RDMA
From: Dave Ertman <david.m.ertman@...el.com>
Register ice client auxiliary RDMA device on the auxiliary bus per
PCIe device function for the auxiliary driver (irdma) to attach to.
Signed-off-by: Dave Ertman <david.m.ertman@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
drivers/net/ethernet/intel/Kconfig | 1 +
drivers/net/ethernet/intel/ice/ice.h | 1 +
drivers/net/ethernet/intel/ice/ice_idc.c | 74 +++++++++++++++++++++++++++++++-
3 files changed, 74 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/intel/Kconfig b/drivers/net/ethernet/intel/Kconfig
index 5aa8631..cbc5968 100644
--- a/drivers/net/ethernet/intel/Kconfig
+++ b/drivers/net/ethernet/intel/Kconfig
@@ -294,6 +294,7 @@ config ICE
tristate "Intel(R) Ethernet Connection E800 Series Support"
default n
depends on PCI_MSI
+ select AUXILIARY_BUS
select NET_DEVLINK
select PLDMFW
help
diff --git a/drivers/net/ethernet/intel/ice/ice.h b/drivers/net/ethernet/intel/ice/ice.h
index b79ffdc..8bf16f4 100644
--- a/drivers/net/ethernet/intel/ice/ice.h
+++ b/drivers/net/ethernet/intel/ice/ice.h
@@ -34,6 +34,7 @@
#include <linux/if_bridge.h>
#include <linux/ctype.h>
#include <linux/bpf.h>
+#include <linux/auxiliary_bus.h>
#include <linux/avf/virtchnl.h>
#include <linux/cpu_rmap.h>
#include <net/devlink.h>
diff --git a/drivers/net/ethernet/intel/ice/ice_idc.c b/drivers/net/ethernet/intel/ice/ice_idc.c
index e7dd958..703c6bd 100644
--- a/drivers/net/ethernet/intel/ice/ice_idc.c
+++ b/drivers/net/ethernet/intel/ice/ice_idc.c
@@ -6,6 +6,8 @@
#include "ice_lib.h"
#include "ice_dcb_lib.h"
+static DEFINE_IDA(ice_peer_ida);
+
static struct peer_obj_id ice_peers[] = ASSIGN_PEER_INFO;
/**
@@ -484,6 +486,9 @@ static void ice_check_peer_drv_for_events(struct iidc_peer_obj *peer_obj)
if (!peer_obj_int)
return 0;
+ auxiliary_device_delete(peer_obj_int->peer_obj.adev);
+ auxiliary_device_uninit(peer_obj_int->peer_obj.adev);
+
peer_drv_int = peer_obj_int->peer_drv_int;
if (peer_obj_int->ice_peer_wq) {
@@ -1220,6 +1225,20 @@ int ice_peer_update_vsi(struct ice_peer_obj_int *peer_obj_int, void *data)
};
/**
+ * ice_peer_adev_release - function to map to aux device's release callback
+ * @dev: pointer to device to free
+ */
+static void ice_peer_adev_release(struct device *dev)
+{
+ struct iidc_auxiliary_object *abo;
+ struct auxiliary_device *adev;
+
+ adev = container_of(dev, struct auxiliary_device, dev);
+ abo = container_of(adev, struct iidc_auxiliary_object, adev);
+ kfree(abo);
+}
+
+/**
* ice_init_peer_devices - initializes peer objects and aux devices
* @pf: ptr to ice_pf
*
@@ -1232,7 +1251,7 @@ int ice_init_peer_devices(struct ice_pf *pf)
struct pci_dev *pdev = pf->pdev;
struct device *dev = &pdev->dev;
unsigned int i;
- int ret;
+ int id, ret;
/* Reserve vector resources */
ret = ice_reserve_peer_qvector(pf);
@@ -1241,12 +1260,21 @@ int ice_init_peer_devices(struct ice_pf *pf)
return ret;
}
+ /* This PFs auxiliary ID value */
+ id = ida_alloc(&ice_peer_ida, GFP_KERNEL);
+ if (id < 0) {
+ dev_err(dev, "failed to allocate device ID for peers\n");
+ return -ENOMEM;
+ }
+
for (i = 0; i < ARRAY_SIZE(ice_peers); i++) {
struct ice_peer_obj_int *peer_obj_int;
struct ice_peer_drv_int *peer_drv_int;
+ struct iidc_auxiliary_object *abo;
struct iidc_qos_params *qos_info;
struct msix_entry *entry = NULL;
struct iidc_peer_obj *peer_obj;
+ struct auxiliary_device *adev;
int j;
/* structure layout needed for container_of's looks like:
@@ -1254,20 +1282,37 @@ int ice_init_peer_devices(struct ice_pf *pf)
* |--> iidc_peer_obj
* |--> *ice_peer_drv_int
*
+ * iidc_auxiliary_object (container_of parent for adev)
+ * |--> auxiliary_device
+ * |--> *iidc_peer_obj (pointer from internal struct)
+ *
* ice_peer_drv_int (internal only peer_drv struct)
*/
peer_obj_int = kzalloc(sizeof(*peer_obj_int), GFP_KERNEL);
- if (!peer_obj_int)
+ if (!peer_obj_int) {
+ ida_simple_remove(&ice_peer_ida, id);
return -ENOMEM;
+ }
+
+ abo = kzalloc(sizeof(*abo), GFP_KERNEL);
+ if (!abo) {
+ ida_simple_remove(&ice_peer_ida, id);
+ kfree(peer_obj_int);
+ return -ENOMEM;
+ }
peer_drv_int = kzalloc(sizeof(*peer_drv_int), GFP_KERNEL);
if (!peer_drv_int) {
+ ida_simple_remove(&ice_peer_ida, id);
kfree(peer_obj_int);
+ kfree(abo);
return -ENOMEM;
}
pf->peers[i] = peer_obj_int;
+ abo->peer_obj = ice_get_peer_obj(peer_obj_int);
peer_obj_int->peer_drv_int = peer_drv_int;
+ peer_obj_int->peer_obj.adev = &abo->adev;
/* Initialize driver values */
for (j = 0; j < IIDC_EVENT_NBITS; j++)
@@ -1289,8 +1334,10 @@ int ice_init_peer_devices(struct ice_pf *pf)
alloc_ordered_workqueue("ice_peer_wq_%d", WQ_UNBOUND,
i);
if (!peer_obj_int->ice_peer_wq) {
+ ida_simple_remove(&ice_peer_ida, id);
kfree(peer_obj_int);
kfree(peer_drv_int);
+ kfree(abo);
return -ENOMEM;
}
INIT_WORK(&peer_obj_int->peer_close_task, ice_peer_close_task);
@@ -1342,6 +1389,27 @@ int ice_init_peer_devices(struct ice_pf *pf)
peer_obj->msix_entries = entry;
ice_peer_state_change(peer_obj_int, ICE_PEER_OBJ_STATE_INIT,
false);
+
+ adev = &abo->adev;
+ adev->name = ice_peers[i].name;
+ adev->id = id;
+ adev->dev.release = ice_peer_adev_release;
+ adev->dev.parent = &pdev->dev;
+
+ ret = auxiliary_device_init(adev);
+ if (ret) {
+ ida_simple_remove(&ice_peer_ida, id);
+ kfree(peer_obj_int);
+ kfree(peer_drv_int);
+ adev = NULL;
+ return ret;
+ }
+
+ ret = auxiliary_device_add(adev);
+ if (ret) {
+ auxiliary_device_uninit(adev);
+ return ret;
+ }
}
return ret;
@@ -1357,4 +1425,6 @@ void ice_uninit_peer_devices(struct ice_pf *pf)
ice_for_each_peer(pf, NULL, ice_unreg_peer_obj);
devm_kfree(&pf->pdev->dev, pf->peers);
}
+
+ ida_destroy(&ice_peer_ida);
}
--
1.8.3.1
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