iidc: Introduce iidc.h

Introduce a shared header file used by the 'ice' Intel networking driver
providing RDMA support and the 'irdma' driver to provide a private
interface.

Signed-off-by: Dave Ertman <david.m.ertman@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

diff --git a/MAINTAINERS b/MAINTAINERS
index bd7aff0..34d2bf3 100644 (file)
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9130,6 +9130,7 @@ F:        Documentation/networking/device_drivers/ethernet/intel/
 F:     drivers/net/ethernet/intel/
 F:     drivers/net/ethernet/intel/*/
 F:     include/linux/avf/virtchnl.h
+F:     include/linux/net/intel/iidc.h
 
 INTEL FRAMEBUFFER DRIVER (excluding 810 and 815)
 M:     Maik Broemme <mbroemme@libmpq.org>

diff --git a/include/linux/net/intel/iidc.h b/include/linux/net/intel/iidc.h
new file mode 100644 (file)
index 0000000..e32f671
--- /dev/null
+++ b/include/linux/net/intel/iidc.h
@@ -0,0 +1,100 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2021, Intel Corporation. */
+
+#ifndef _IIDC_H_
+#define _IIDC_H_
+
+#include <linux/auxiliary_bus.h>
+#include <linux/dcbnl.h>
+#include <linux/device.h>
+#include <linux/if_ether.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+
+enum iidc_event_type {
+       IIDC_EVENT_BEFORE_MTU_CHANGE,
+       IIDC_EVENT_AFTER_MTU_CHANGE,
+       IIDC_EVENT_BEFORE_TC_CHANGE,
+       IIDC_EVENT_AFTER_TC_CHANGE,
+       IIDC_EVENT_CRIT_ERR,
+       IIDC_EVENT_NBITS                /* must be last */
+};
+
+enum iidc_reset_type {
+       IIDC_PFR,
+       IIDC_CORER,
+       IIDC_GLOBR,
+};
+
+#define IIDC_MAX_USER_PRIORITY         8
+
+/* Struct to hold per RDMA Qset info */
+struct iidc_rdma_qset_params {
+       /* Qset TEID returned to the RDMA driver in
+        * ice_add_rdma_qset and used by RDMA driver
+        * for calls to ice_del_rdma_qset
+        */
+       u32 teid;       /* Qset TEID */
+       u16 qs_handle; /* RDMA driver provides this */
+       u16 vport_id; /* VSI index */
+       u8 tc; /* TC branch the Qset should belong to */
+};
+
+struct iidc_qos_info {
+       u64 tc_ctx;
+       u8 rel_bw;
+       u8 prio_type;
+       u8 egress_virt_up;
+       u8 ingress_virt_up;
+};
+
+/* Struct to pass QoS info */
+struct iidc_qos_params {
+       struct iidc_qos_info tc_info[IEEE_8021QAZ_MAX_TCS];
+       u8 up2tc[IIDC_MAX_USER_PRIORITY];
+       u8 vport_relative_bw;
+       u8 vport_priority_type;
+       u8 num_tc;
+};
+
+struct iidc_event {
+       DECLARE_BITMAP(type, IIDC_EVENT_NBITS);
+       u32 reg;
+};
+
+struct ice_pf;
+
+int ice_add_rdma_qset(struct ice_pf *pf, struct iidc_rdma_qset_params *qset);
+int ice_del_rdma_qset(struct ice_pf *pf, struct iidc_rdma_qset_params *qset);
+int ice_rdma_request_reset(struct ice_pf *pf, enum iidc_reset_type reset_type);
+int ice_rdma_update_vsi_filter(struct ice_pf *pf, u16 vsi_id, bool enable);
+void ice_get_qos_params(struct ice_pf *pf, struct iidc_qos_params *qos);
+
+#define IIDC_RDMA_ROCE_NAME    "roce"
+
+/* Structure representing auxiliary driver tailored information about the core
+ * PCI dev, each auxiliary driver using the IIDC interface will have an
+ * instance of this struct dedicated to it.
+ */
+
+struct iidc_auxiliary_dev {
+       struct auxiliary_device adev;
+       struct ice_pf *pf;
+};
+
+/* structure representing the auxiliary driver. This struct is to be
+ * allocated and populated by the auxiliary driver's owner. The core PCI
+ * driver will access these ops by performing a container_of on the
+ * auxiliary_device->dev.driver.
+ */
+struct iidc_auxiliary_drv {
+       struct auxiliary_driver adrv;
+       /* This event_handler is meant to be a blocking call.  For instance,
+        * when a BEFORE_MTU_CHANGE event comes in, the event_handler will not
+        * return until the auxiliary driver is ready for the MTU change to
+        * happen.
+        */
+       void (*event_handler)(struct ice_pf *pf, struct iidc_event *event);
+};
+
+#endif /* _IIDC_H_*/