From 04dd17822334871b23ea2862f7798fb0e0007777 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 11 May 2024 08:53:19 +0000
Subject: [PATCH] change otg to host mode
---
kernel/drivers/net/ethernet/sfc/nic.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++------
1 files changed, 52 insertions(+), 6 deletions(-)
diff --git a/kernel/drivers/net/ethernet/sfc/nic.c b/kernel/drivers/net/ethernet/sfc/nic.c
index aa1945a..22fbb0a 100644
--- a/kernel/drivers/net/ethernet/sfc/nic.c
+++ b/kernel/drivers/net/ethernet/sfc/nic.c
@@ -1,11 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
/****************************************************************************
* Driver for Solarflare network controllers and boards
* Copyright 2005-2006 Fen Systems Ltd.
* Copyright 2006-2013 Solarflare Communications Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation, incorporated herein by reference.
*/
#include <linux/bitops.h>
@@ -23,6 +20,7 @@
#include "farch_regs.h"
#include "io.h"
#include "workarounds.h"
+#include "mcdi_pcol.h"
/**************************************************************************
*
@@ -34,8 +32,8 @@
int efx_nic_alloc_buffer(struct efx_nic *efx, struct efx_buffer *buffer,
unsigned int len, gfp_t gfp_flags)
{
- buffer->addr = dma_zalloc_coherent(&efx->pci_dev->dev, len,
- &buffer->dma_addr, gfp_flags);
+ buffer->addr = dma_alloc_coherent(&efx->pci_dev->dev, len,
+ &buffer->dma_addr, gfp_flags);
if (!buffer->addr)
return -ENOMEM;
buffer->len = len;
@@ -92,6 +90,7 @@
efx->pci_dev->irq);
goto fail1;
}
+ efx->irqs_hooked = true;
return 0;
}
@@ -131,6 +130,7 @@
#endif
}
+ efx->irqs_hooked = true;
return 0;
fail2:
@@ -156,6 +156,8 @@
efx->net_dev->rx_cpu_rmap = NULL;
#endif
+ if (!efx->irqs_hooked)
+ return;
if (EFX_INT_MODE_USE_MSI(efx)) {
/* Disable MSI/MSI-X interrupts */
efx_for_each_channel(channel, efx)
@@ -165,6 +167,7 @@
/* Disable legacy interrupt */
free_irq(efx->legacy_irq, efx);
}
+ efx->irqs_hooked = false;
}
/* Register dump */
@@ -474,6 +477,49 @@
}
/**
+ * efx_nic_copy_stats - Copy stats from the DMA buffer in to an
+ * intermediate buffer. This is used to get a consistent
+ * set of stats while the DMA buffer can be written at any time
+ * by the NIC.
+ * @efx: The associated NIC.
+ * @dest: Destination buffer. Must be the same size as the DMA buffer.
+ */
+int efx_nic_copy_stats(struct efx_nic *efx, __le64 *dest)
+{
+ __le64 *dma_stats = efx->stats_buffer.addr;
+ __le64 generation_start, generation_end;
+ int rc = 0, retry;
+
+ if (!dest)
+ return 0;
+
+ if (!dma_stats)
+ goto return_zeroes;
+
+ /* If we're unlucky enough to read statistics during the DMA, wait
+ * up to 10ms for it to finish (typically takes <500us)
+ */
+ for (retry = 0; retry < 100; ++retry) {
+ generation_end = dma_stats[efx->num_mac_stats - 1];
+ if (generation_end == EFX_MC_STATS_GENERATION_INVALID)
+ goto return_zeroes;
+ rmb();
+ memcpy(dest, dma_stats, efx->num_mac_stats * sizeof(__le64));
+ rmb();
+ generation_start = dma_stats[MC_CMD_MAC_GENERATION_START];
+ if (generation_end == generation_start)
+ return 0; /* return good data */
+ udelay(100);
+ }
+
+ rc = -EIO;
+
+return_zeroes:
+ memset(dest, 0, efx->num_mac_stats * sizeof(u64));
+ return rc;
+}
+
+/**
* efx_nic_update_stats - Convert statistics DMA buffer to array of u64
* @desc: Array of &struct efx_hw_stat_desc describing the DMA buffer
* layout. DMA widths of 0, 16, 32 and 64 are supported; where
--
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