Merge branch 'nfp-abm-add-basic-support-for-advanced-buffering-NIC'

Jakub Kicinski says:

====================
nfp: abm: add basic support for advanced buffering NIC

This series lays groundwork for advanced buffer management NIC feature.
It makes necessary NFP core changes, spawns representors and adds devlink
glue.  Following series will add the actual buffering configuration (patch
series size limit).

First three patches add support for configuring NFP buffer pools via a
mailbox.  The existing devlink APIs are used for the purpose.

Third patch allows us to perform small reads from the NFP memory.

The rest of the patch set adds eswitch mode change support and makes
the driver spawn appropriate representors.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 26 insertions, 1 deletions

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_main.h b/drivers/net/ethernet/netronome/nfp/nfp_main.h
index 42211083b51f..595b3dc280e3 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_main.h
+++ b/drivers/net/ethernet/netronome/nfp/nfp_main.h
@@ -46,10 +46,10 @@
 #include <linux/mutex.h>
 #include <linux/pci.h>
 #include <linux/workqueue.h>
+#include <net/devlink.h>
 
 struct dentry;
 struct device;
-struct devlink_ops;
 struct pci_dev;
 
 struct nfp_cpp;
@@ -60,7 +60,9 @@ struct nfp_mip;
 struct nfp_net;
 struct nfp_nsp_identify;
 struct nfp_port;
+struct nfp_rtsym;
 struct nfp_rtsym_table;
+struct nfp_shared_buf;
 
 /**
  * struct nfp_dumpspec - NFP FW dump specification structure
@@ -87,6 +89,7 @@ struct nfp_dumpspec {
  * @vf_cfg_mem:		Pointer to mapped VF configuration area
  * @vfcfg_tbl2_area:	Pointer to the CPP area for the VF config table
  * @vfcfg_tbl2:		Pointer to mapped VF config table
+ * @mbox:		RTSym of per-PCI PF mailbox (under devlink lock)
  * @irq_entries:	Array of MSI-X entries for all vNICs
  * @limit_vfs:		Number of VFs supported by firmware (~0 for PCI limit)
  * @num_vfs:		Number of SR-IOV VFs enabled
@@ -108,6 +111,8 @@ struct nfp_dumpspec {
  * @ports:		Linked list of port structures (struct nfp_port)
  * @wq:			Workqueue for running works which need to grab @lock
  * @port_refresh_work:	Work entry for taking netdevs out
+ * @shared_bufs:	Array of shared buffer structures if FW has any SBs
+ * @num_shared_bufs:	Number of elements in @shared_bufs
  * @lock:		Protects all fields which may change after probe
  */
 struct nfp_pf {
@@ -127,6 +132,8 @@ struct nfp_pf {
 	struct nfp_cpp_area *vfcfg_tbl2_area;
 	u8 __iomem *vfcfg_tbl2;
 
+	const struct nfp_rtsym *mbox;
+
 	struct msix_entry *irq_entries;
 
 	unsigned int limit_vfs;
@@ -158,6 +165,9 @@ struct nfp_pf {
 	struct workqueue_struct *wq;
 	struct work_struct port_refresh_work;
 
+	struct nfp_shared_buf *shared_bufs;
+	unsigned int num_shared_bufs;
+
 	struct mutex lock;
 };
 
@@ -177,6 +187,14 @@ nfp_net_get_mac_addr(struct nfp_pf *pf, struct net_device *netdev,
 
 bool nfp_ctrl_tx(struct nfp_net *nn, struct sk_buff *skb);
 
+int nfp_pf_rtsym_read_optional(struct nfp_pf *pf, const char *format,
+			       unsigned int default_val);
+u8 __iomem *
+nfp_pf_map_rtsym(struct nfp_pf *pf, const char *name, const char *sym_fmt,
+		 unsigned int min_size, struct nfp_cpp_area **area);
+int nfp_mbox_cmd(struct nfp_pf *pf, u32 cmd, void *in_data, u64 in_length,
+		 void *out_data, u64 out_length);
+
 enum nfp_dump_diag {
 	NFP_DUMP_NSP_DIAG = 0,
 };
@@ -188,4 +206,11 @@ s64 nfp_net_dump_calculate_size(struct nfp_pf *pf, struct nfp_dumpspec *spec,
 int nfp_net_dump_populate_buffer(struct nfp_pf *pf, struct nfp_dumpspec *spec,
 				 struct ethtool_dump *dump_param, void *dest);
 
+int nfp_shared_buf_register(struct nfp_pf *pf);
+void nfp_shared_buf_unregister(struct nfp_pf *pf);
+int nfp_shared_buf_pool_get(struct nfp_pf *pf, unsigned int sb, u16 pool_index,
+			    struct devlink_sb_pool_info *pool_info);
+int nfp_shared_buf_pool_set(struct nfp_pf *pf, unsigned int sb,
+			    u16 pool_index, u32 size,
+			    enum devlink_sb_threshold_type threshold_type);
 #endif /* NFP_MAIN_H */