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Message-Id: <20210330165922.2006-2-shiraz.saleem@intel.com>
Date: Tue, 30 Mar 2021 11:59:00 -0500
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, netdev@...r.kernel.org,
david.m.ertman@...el.com, anthony.l.nguyen@...el.com,
Shiraz Saleem <shiraz.saleem@...el.com>
Subject: [PATCH v3 01/23] iidc: Introduce iidc.h
From: Dave Ertman <david.m.ertman@...el.com>
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@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@...el.com>
---
MAINTAINERS | 1 +
include/linux/net/intel/iidc.h | 242 +++++++++++++++++++++++++++++++++++++++++
2 files changed, 243 insertions(+)
create mode 100644 include/linux/net/intel/iidc.h
diff --git a/MAINTAINERS b/MAINTAINERS
index d92f85c..2d2d4e7 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8956,6 +8956,7 @@ 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@...mpq.org>
diff --git a/include/linux/net/intel/iidc.h b/include/linux/net/intel/iidc.h
new file mode 100644
index 0000000..2c360c4
--- /dev/null
+++ b/include/linux/net/intel/iidc.h
@@ -0,0 +1,242 @@
+/* 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_DSCP_MAP_CHANGE,
+ IIDC_EVENT_CRIT_ERR,
+ IIDC_EVENT_NBITS /* must be last */
+};
+
+enum iidc_res_type {
+ IIDC_INVAL_RES,
+ IIDC_VSI,
+ IIDC_VEB,
+ IIDC_EVENT_Q,
+ IIDC_EGRESS_CMPL_Q,
+ IIDC_CMPL_EVENT_Q,
+ IIDC_ASYNC_EVENT_Q,
+ IIDC_DOORBELL_Q,
+ IIDC_RDMA_QSETS_TXSCHED,
+};
+
+enum iidc_reset_type {
+ IIDC_PFR,
+ IIDC_CORER,
+ IIDC_GLOBR,
+};
+
+enum iidc_rdma_protocol {
+ IIDC_RDMA_PROTOCOL_IWARP,
+ IIDC_RDMA_PROTOCOL_ROCEV2,
+};
+
+/* Struct to hold per DCB APP info */
+struct iidc_dcb_app_info {
+ u8 priority;
+ u8 selector;
+ u16 prot_id;
+};
+
+struct iidc_core_dev_info;
+
+#define IIDC_MAX_USER_PRIORITY 8
+#define IIDC_MAX_APPS 72
+#define IIDC_MAX_DSCP_MAPPING 64
+
+/* Struct to hold per RDMA Qset info */
+struct iidc_rdma_qset_params {
+ 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 */
+ u8 reserved[3];
+};
+
+struct iidc_res_base {
+ /* Union for future provision e.g. other res_type */
+ union {
+ struct iidc_rdma_qset_params qsets;
+ } res;
+};
+
+struct iidc_res {
+ /* Type of resource. */
+ enum iidc_res_type res_type;
+ /* Count requested */
+ u16 cnt_req;
+
+ /* Number of resources allocated. Filled in by callee.
+ * Based on this value, caller to fill up "resources"
+ */
+ u16 res_allocated;
+
+ /* Unique handle to resources allocated. Zero if call fails.
+ * Allocated by callee and for now used by caller for internal
+ * tracking purpose.
+ */
+ u32 res_handle;
+
+ /* Peer driver has to allocate sufficient memory, to accommodate
+ * cnt_requested before calling this function.
+ * Memory has to be zero initialized. It is input/output param.
+ * As a result of alloc_res API, this structures will be populated.
+ */
+ struct iidc_res_base res[1];
+};
+
+struct iidc_qos_info {
+ u64 tc_ctx;
+ u8 rel_bw;
+ u8 prio_type;
+ u8 egress_virt_up;
+ u8 ingress_virt_up;
+};
+
+struct iidc_dscp_map {
+ u16 dscp_val;
+ u8 tc;
+};
+
+/* Struct to hold 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;
+ u32 num_apps;
+ struct iidc_dcb_app_info apps[IIDC_MAX_APPS];
+ struct iidc_dscp_map dscp_maps[IIDC_MAX_DSCP_MAPPING];
+ u8 num_tc;
+};
+
+union iidc_event_info {
+ /* IIDC_EVENT_AFTER_TC_CHANGE */
+ struct iidc_qos_params port_qos;
+ /* IIDC_EVENT_CRIT_ERR */
+ u32 reg;
+};
+
+struct iidc_event {
+ DECLARE_BITMAP(type, IIDC_EVENT_NBITS);
+ union iidc_event_info info;
+};
+
+/* Following APIs are implemented by core PCI driver */
+struct iidc_core_ops {
+ /* APIs to allocate resources such as VEB, VSI, Doorbell queues,
+ * completion queues, Tx/Rx queues, etc...
+ */
+ int (*alloc_res)(struct iidc_core_dev_info *cdev_info,
+ struct iidc_res *res,
+ int partial_acceptable);
+ int (*free_res)(struct iidc_core_dev_info *cdev_info,
+ struct iidc_res *res);
+
+ int (*request_reset)(struct iidc_core_dev_info *cdev_info,
+ enum iidc_reset_type reset_type);
+
+ int (*update_vport_filter)(struct iidc_core_dev_info *cdev_info,
+ u16 vport_id, bool enable);
+ int (*vc_send)(struct iidc_core_dev_info *cdev_info, u32 vf_id, u8 *msg,
+ u16 len);
+};
+
+/* Following APIs are implemented by auxiliary drivers and invoked by core PCI
+ * driver
+ */
+struct iidc_auxiliary_ops {
+ /* 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 iidc_core_dev_info *cdev_info,
+ struct iidc_event *event);
+
+ int (*vc_receive)(struct iidc_core_dev_info *cdev_info, u32 vf_id,
+ u8 *msg, u16 len);
+};
+
+#define IIDC_RDMA_NAME "intel_rdma"
+#define IIDC_RDMA_ID 0x00000010
+#define IIDC_MAX_NUM_AUX 4
+
+/* The const struct that instantiates cdev_info_id needs to be initialized
+ * in the .c with the macro ASSIGN_IIDC_INFO.
+ * For example:
+ * static const struct cdev_info_id cdev_info_ids[] = ASSIGN_IIDC_INFO;
+ */
+struct cdev_info_id {
+ char *name;
+ int id;
+};
+
+#define IIDC_RDMA_INFO { .name = IIDC_RDMA_NAME, .id = IIDC_RDMA_ID },
+
+#define ASSIGN_IIDC_INFO \
+{ \
+ IIDC_RDMA_INFO \
+}
+
+#define iidc_priv(x) ((x)->auxiliary_priv)
+
+/* 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_core_dev_info {
+ struct pci_dev *pdev; /* PCI device of corresponding to main function */
+ struct auxiliary_device *adev;
+ /* KVA / Linear address corresponding to BAR0 of underlying
+ * pci_device.
+ */
+ u8 __iomem *hw_addr;
+ int cdev_info_id;
+
+ u8 ftype; /* PF(false) or VF (true) */
+
+ u16 vport_id;
+ enum iidc_rdma_protocol rdma_protocol;
+
+ struct iidc_qos_params qos_info;
+ struct net_device *netdev;
+
+ struct msix_entry *msix_entries;
+ u16 msix_count; /* How many vectors are reserved for this device */
+
+ /* Following struct contains function pointers to be initialized
+ * by core PCI driver and called by auxiliary driver
+ */
+ const struct iidc_core_ops *ops;
+};
+
+struct iidc_auxiliary_dev {
+ struct auxiliary_device adev;
+ struct iidc_core_dev_info *cdev_info;
+};
+
+/* 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;
+ struct iidc_auxiliary_ops *ops;
+};
+
+#endif /* _IIDC_H_*/
--
1.8.3.1
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