sfc: commonise MCDI MAC stats handling

Most of it was already declared in mcdi_port_common.h, so just move the
 implementations to mcdi_port_common.c.
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/sfc/mcdi_port.c

@@ -692,80 +692,6 @@ bool efx_mcdi_mac_check_fault(struct efx_nic *efx)
 	return MCDI_DWORD(outbuf, GET_LINK_OUT_MAC_FAULT) != 0;
 }
 
-enum efx_stats_action {
-	EFX_STATS_ENABLE,
-	EFX_STATS_DISABLE,
-	EFX_STATS_PULL,
-};
-
-static int efx_mcdi_mac_stats(struct efx_nic *efx,
-			      enum efx_stats_action action, int clear)
-{
-	MCDI_DECLARE_BUF(inbuf, MC_CMD_MAC_STATS_IN_LEN);
-	int rc;
-	int change = action == EFX_STATS_PULL ? 0 : 1;
-	int enable = action == EFX_STATS_ENABLE ? 1 : 0;
-	int period = action == EFX_STATS_ENABLE ? 1000 : 0;
-	dma_addr_t dma_addr = efx->stats_buffer.dma_addr;
-	u32 dma_len = action != EFX_STATS_DISABLE ?
-		efx->num_mac_stats * sizeof(u64) : 0;
-
-	BUILD_BUG_ON(MC_CMD_MAC_STATS_OUT_DMA_LEN != 0);
-
-	MCDI_SET_QWORD(inbuf, MAC_STATS_IN_DMA_ADDR, dma_addr);
-	MCDI_POPULATE_DWORD_7(inbuf, MAC_STATS_IN_CMD,
-			      MAC_STATS_IN_DMA, !!enable,
-			      MAC_STATS_IN_CLEAR, clear,
-			      MAC_STATS_IN_PERIODIC_CHANGE, change,
-			      MAC_STATS_IN_PERIODIC_ENABLE, enable,
-			      MAC_STATS_IN_PERIODIC_CLEAR, 0,
-			      MAC_STATS_IN_PERIODIC_NOEVENT, 1,
-			      MAC_STATS_IN_PERIOD_MS, period);
-	MCDI_SET_DWORD(inbuf, MAC_STATS_IN_DMA_LEN, dma_len);
-
-	if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0)
-		MCDI_SET_DWORD(inbuf, MAC_STATS_IN_PORT_ID, efx->vport_id);
-
-	rc = efx_mcdi_rpc_quiet(efx, MC_CMD_MAC_STATS, inbuf, sizeof(inbuf),
-				NULL, 0, NULL);
-	/* Expect ENOENT if DMA queues have not been set up */
-	if (rc && (rc != -ENOENT || atomic_read(&efx->active_queues)))
-		efx_mcdi_display_error(efx, MC_CMD_MAC_STATS, sizeof(inbuf),
-				       NULL, 0, rc);
-	return rc;
-}
-
-void efx_mcdi_mac_start_stats(struct efx_nic *efx)
-{
-	__le64 *dma_stats = efx->stats_buffer.addr;
-
-	dma_stats[efx->num_mac_stats - 1] = EFX_MC_STATS_GENERATION_INVALID;
-
-	efx_mcdi_mac_stats(efx, EFX_STATS_ENABLE, 0);
-}
-
-void efx_mcdi_mac_stop_stats(struct efx_nic *efx)
-{
-	efx_mcdi_mac_stats(efx, EFX_STATS_DISABLE, 0);
-}
-
-#define EFX_MAC_STATS_WAIT_US 100
-#define EFX_MAC_STATS_WAIT_ATTEMPTS 10
-
-void efx_mcdi_mac_pull_stats(struct efx_nic *efx)
-{
-	__le64 *dma_stats = efx->stats_buffer.addr;
-	int attempts = EFX_MAC_STATS_WAIT_ATTEMPTS;
-
-	dma_stats[efx->num_mac_stats - 1] = EFX_MC_STATS_GENERATION_INVALID;
-	efx_mcdi_mac_stats(efx, EFX_STATS_PULL, 0);
-
-	while (dma_stats[efx->num_mac_stats - 1] ==
-				EFX_MC_STATS_GENERATION_INVALID &&
-			attempts-- != 0)
-		udelay(EFX_MAC_STATS_WAIT_US);
-}
-
 int efx_mcdi_port_probe(struct efx_nic *efx)
 {
 	int rc;
@@ -783,24 +709,11 @@ int efx_mcdi_port_probe(struct efx_nic *efx)
 	if (rc != 0)
 		return rc;
 
-	/* Allocate buffer for stats */
-	rc = efx_nic_alloc_buffer(efx, &efx->stats_buffer,
-				  efx->num_mac_stats * sizeof(u64), GFP_KERNEL);
-	if (rc)
-		return rc;
-	netif_dbg(efx, probe, efx->net_dev,
-		  "stats buffer at %llx (virt %p phys %llx)\n",
-		  (u64)efx->stats_buffer.dma_addr,
-		  efx->stats_buffer.addr,
-		  (u64)virt_to_phys(efx->stats_buffer.addr));
-
-	efx_mcdi_mac_stats(efx, EFX_STATS_DISABLE, 1);
-
-	return 0;
+	return efx_mcdi_mac_init_stats(efx);
 }
 
 void efx_mcdi_port_remove(struct efx_nic *efx)
 {
 	efx->phy_op->remove(efx);
-	efx_nic_free_buffer(efx, &efx->stats_buffer);
+	efx_mcdi_mac_fini_stats(efx);
 }

drivers/net/ethernet/sfc/mcdi_port_common.c

@@ -10,6 +10,7 @@
 
 #include "mcdi_port_common.h"
 #include "efx_common.h"
+#include "nic.h"
 
 int efx_mcdi_get_phy_cfg(struct efx_nic *efx, struct efx_mcdi_phy_data *cfg)
 {
@@ -520,6 +521,110 @@ int efx_mcdi_set_mac(struct efx_nic *efx)
 			    NULL, 0, NULL);
 }
 
+enum efx_stats_action {
+	EFX_STATS_ENABLE,
+	EFX_STATS_DISABLE,
+	EFX_STATS_PULL,
+};
+
+static int efx_mcdi_mac_stats(struct efx_nic *efx,
+			      enum efx_stats_action action, int clear)
+{
+	MCDI_DECLARE_BUF(inbuf, MC_CMD_MAC_STATS_IN_LEN);
+	int rc;
+	int change = action == EFX_STATS_PULL ? 0 : 1;
+	int enable = action == EFX_STATS_ENABLE ? 1 : 0;
+	int period = action == EFX_STATS_ENABLE ? 1000 : 0;
+	dma_addr_t dma_addr = efx->stats_buffer.dma_addr;
+	u32 dma_len = action != EFX_STATS_DISABLE ?
+		efx->num_mac_stats * sizeof(u64) : 0;
+
+	BUILD_BUG_ON(MC_CMD_MAC_STATS_OUT_DMA_LEN != 0);
+
+	MCDI_SET_QWORD(inbuf, MAC_STATS_IN_DMA_ADDR, dma_addr);
+	MCDI_POPULATE_DWORD_7(inbuf, MAC_STATS_IN_CMD,
+			      MAC_STATS_IN_DMA, !!enable,
+			      MAC_STATS_IN_CLEAR, clear,
+			      MAC_STATS_IN_PERIODIC_CHANGE, change,
+			      MAC_STATS_IN_PERIODIC_ENABLE, enable,
+			      MAC_STATS_IN_PERIODIC_CLEAR, 0,
+			      MAC_STATS_IN_PERIODIC_NOEVENT, 1,
+			      MAC_STATS_IN_PERIOD_MS, period);
+	MCDI_SET_DWORD(inbuf, MAC_STATS_IN_DMA_LEN, dma_len);
+
+	if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0)
+		MCDI_SET_DWORD(inbuf, MAC_STATS_IN_PORT_ID, efx->vport_id);
+
+	rc = efx_mcdi_rpc_quiet(efx, MC_CMD_MAC_STATS, inbuf, sizeof(inbuf),
+				NULL, 0, NULL);
+	/* Expect ENOENT if DMA queues have not been set up */
+	if (rc && (rc != -ENOENT || atomic_read(&efx->active_queues)))
+		efx_mcdi_display_error(efx, MC_CMD_MAC_STATS, sizeof(inbuf),
+				       NULL, 0, rc);
+	return rc;
+}
+
+void efx_mcdi_mac_start_stats(struct efx_nic *efx)
+{
+	__le64 *dma_stats = efx->stats_buffer.addr;
+
+	dma_stats[efx->num_mac_stats - 1] = EFX_MC_STATS_GENERATION_INVALID;
+
+	efx_mcdi_mac_stats(efx, EFX_STATS_ENABLE, 0);
+}
+
+void efx_mcdi_mac_stop_stats(struct efx_nic *efx)
+{
+	efx_mcdi_mac_stats(efx, EFX_STATS_DISABLE, 0);
+}
+
+#define EFX_MAC_STATS_WAIT_US 100
+#define EFX_MAC_STATS_WAIT_ATTEMPTS 10
+
+void efx_mcdi_mac_pull_stats(struct efx_nic *efx)
+{
+	__le64 *dma_stats = efx->stats_buffer.addr;
+	int attempts = EFX_MAC_STATS_WAIT_ATTEMPTS;
+
+	dma_stats[efx->num_mac_stats - 1] = EFX_MC_STATS_GENERATION_INVALID;
+	efx_mcdi_mac_stats(efx, EFX_STATS_PULL, 0);
+
+	while (dma_stats[efx->num_mac_stats - 1] ==
+				EFX_MC_STATS_GENERATION_INVALID &&
+			attempts-- != 0)
+		udelay(EFX_MAC_STATS_WAIT_US);
+}
+
+int efx_mcdi_mac_init_stats(struct efx_nic *efx)
+{
+	int rc;
+
+	if (!efx->num_mac_stats)
+		return 0;
+
+	/* Allocate buffer for stats */
+	rc = efx_nic_alloc_buffer(efx, &efx->stats_buffer,
+				  efx->num_mac_stats * sizeof(u64), GFP_KERNEL);
+	if (rc) {
+		netif_warn(efx, probe, efx->net_dev,
+			   "failed to allocate DMA buffer: %d\n", rc);
+		return rc;
+	}
+
+	netif_dbg(efx, probe, efx->net_dev,
+		  "stats buffer at %llx (virt %p phys %llx)\n",
+		  (u64) efx->stats_buffer.dma_addr,
+		  efx->stats_buffer.addr,
+		  (u64) virt_to_phys(efx->stats_buffer.addr));
+
+	return 0;
+}
+
+void efx_mcdi_mac_fini_stats(struct efx_nic *efx)
+{
+	efx_nic_free_buffer(efx, &efx->stats_buffer);
+}
+
 /* Get physical port number (EF10 only; on Siena it is same as PF number) */
 int efx_mcdi_port_get_number(struct efx_nic *efx)
 {

drivers/net/ethernet/sfc/mcdi_port_common.h

@@ -51,6 +51,8 @@ int efx_mcdi_phy_get_fecparam(struct efx_nic *efx,
 			      struct ethtool_fecparam *fec);
 int efx_mcdi_phy_test_alive(struct efx_nic *efx);
 int efx_mcdi_set_mac(struct efx_nic *efx);
+int efx_mcdi_mac_init_stats(struct efx_nic *efx);
+void efx_mcdi_mac_fini_stats(struct efx_nic *efx);
 int efx_mcdi_port_get_number(struct efx_nic *efx);
 void efx_mcdi_process_link_change(struct efx_nic *efx, efx_qword_t *ev);