diff mbox series

[net-next,06/12] mlxsw: pci: Store maximum number of ports

Message ID 1ae1ff81fcf24324e0371ba983bfbf121f923523.1738665783.git.petrm@nvidia.com (mailing list archive)
State New
Delegated to: Netdev Maintainers
Headers show
Series mlxsw: Preparations for XDP support | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 8 of 8 maintainers
netdev/build_clang success Errors and warnings before: 2 this patch: 2
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 44 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2025-02-04--15-00 (tests: 886)

Commit Message

Petr Machata Feb. 4, 2025, 11:05 a.m. UTC 
From: Amit Cohen <amcohen@nvidia.com>

A next patch will store mapping between local port to netdevice in PCI
driver. The motivation is to allow quick access to XDP program.
When a packet is received, the Rx local port is known, to run XDP program
we need to map Rx local port to netdevice, as XDP program is set per
netdevice.

As preparation, store the maximum number of ports as part of mlxsw_pci
structure, this value is queried from firmware.

Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
---
 drivers/net/ethernet/mellanox/mlxsw/pci.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mellanox/mlxsw/pci.c b/drivers/net/ethernet/mellanox/mlxsw/pci.c
index 5796d836a7ee..8af4050d5fc6 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/pci.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/pci.c
@@ -137,6 +137,7 @@  struct mlxsw_pci {
 	bool skip_reset;
 	struct net_device *napi_dev_tx;
 	struct net_device *napi_dev_rx;
+	unsigned int max_ports;
 };
 
 static int mlxsw_pci_napi_devs_init(struct mlxsw_pci *mlxsw_pci)
@@ -171,6 +172,20 @@  static void mlxsw_pci_napi_devs_fini(struct mlxsw_pci *mlxsw_pci)
 	free_netdev(mlxsw_pci->napi_dev_tx);
 }
 
+static int mlxsw_pci_max_ports_set(struct mlxsw_pci *mlxsw_pci)
+{
+	struct mlxsw_core *mlxsw_core = mlxsw_pci->core;
+	unsigned int max_ports;
+
+	if (!MLXSW_CORE_RES_VALID(mlxsw_core, MAX_SYSTEM_PORT))
+		return -EINVAL;
+
+	/* Switch ports are numbered from 1 to queried value */
+	max_ports = MLXSW_CORE_RES_GET(mlxsw_core, MAX_SYSTEM_PORT) + 1;
+	mlxsw_pci->max_ports = max_ports;
+	return 0;
+}
+
 static char *__mlxsw_pci_queue_elem_get(struct mlxsw_pci_queue *q,
 					size_t elem_size, int elem_index)
 {
@@ -2069,6 +2084,10 @@  static int mlxsw_pci_init(void *bus_priv, struct mlxsw_core *mlxsw_core,
 	if (err)
 		goto err_napi_devs_init;
 
+	err = mlxsw_pci_max_ports_set(mlxsw_pci);
+	if (err)
+		goto err_max_ports_set;
+
 	err = mlxsw_pci_aqs_init(mlxsw_pci, mbox);
 	if (err)
 		goto err_aqs_init;
@@ -2086,6 +2105,7 @@  static int mlxsw_pci_init(void *bus_priv, struct mlxsw_core *mlxsw_core,
 err_request_eq_irq:
 	mlxsw_pci_aqs_fini(mlxsw_pci);
 err_aqs_init:
+err_max_ports_set:
 	mlxsw_pci_napi_devs_fini(mlxsw_pci);
 err_napi_devs_init:
 err_requery_resources: