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Date: Mon, 11 Jan 2021 19:35:36 +0800
From: Joakim Zhang <qiangqing.zhang@....com>
To: peppe.cavallaro@...com, alexandre.torgue@...com,
joabreu@...opsys.com, davem@...emloft.net, kuba@...nel.org
Cc: netdev@...r.kernel.org, linux-imx@....com
Subject: [PATCH 4/6] ethernet: stmmac: fix dma physical address of descriptor when display ring
Driver uses dma_alloc_coherent to allocate dma memory for descriptors,
dma_alloc_coherent will return both the virtual address and physical
address. AFAIK, virt_to_phys could not convert virtual address to
physical address, for which memory is allocated by dma_alloc_coherent.
Signed-off-by: Joakim Zhang <qiangqing.zhang@....com>
---
.../ethernet/stmicro/stmmac/dwmac4_descs.c | 5 +-
.../net/ethernet/stmicro/stmmac/enh_desc.c | 5 +-
drivers/net/ethernet/stmicro/stmmac/hwif.h | 3 +-
.../net/ethernet/stmicro/stmmac/norm_desc.c | 5 +-
.../net/ethernet/stmicro/stmmac/stmmac_main.c | 50 ++++++++++++-------
5 files changed, 44 insertions(+), 24 deletions(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c
index c6540b003b43..8e1ee33ba1e6 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c
@@ -402,7 +402,8 @@ static void dwmac4_rd_set_tx_ic(struct dma_desc *p)
p->des2 |= cpu_to_le32(TDES2_INTERRUPT_ON_COMPLETION);
}
-static void dwmac4_display_ring(void *head, unsigned int size, bool rx)
+static void dwmac4_display_ring(void *head, unsigned int size, bool rx,
+ unsigned int dma_rx_phy, unsigned int desc_size)
{
struct dma_desc *p = (struct dma_desc *)head;
int i;
@@ -411,7 +412,7 @@ static void dwmac4_display_ring(void *head, unsigned int size, bool rx)
for (i = 0; i < size; i++) {
pr_info("%03d [0x%x]: 0x%x 0x%x 0x%x 0x%x\n",
- i, (unsigned int)virt_to_phys(p),
+ i, (unsigned int)(dma_rx_phy + i * desc_size),
le32_to_cpu(p->des0), le32_to_cpu(p->des1),
le32_to_cpu(p->des2), le32_to_cpu(p->des3));
p++;
diff --git a/drivers/net/ethernet/stmicro/stmmac/enh_desc.c b/drivers/net/ethernet/stmicro/stmmac/enh_desc.c
index d02cec296f51..a7324b9c1a02 100644
--- a/drivers/net/ethernet/stmicro/stmmac/enh_desc.c
+++ b/drivers/net/ethernet/stmicro/stmmac/enh_desc.c
@@ -417,7 +417,8 @@ static int enh_desc_get_rx_timestamp_status(void *desc, void *next_desc,
}
}
-static void enh_desc_display_ring(void *head, unsigned int size, bool rx)
+static void enh_desc_display_ring(void *head, unsigned int size, bool rx,
+ unsigned int dma_rx_phy, unsigned int desc_size)
{
struct dma_extended_desc *ep = (struct dma_extended_desc *)head;
int i;
@@ -429,7 +430,7 @@ static void enh_desc_display_ring(void *head, unsigned int size, bool rx)
x = *(u64 *)ep;
pr_info("%03d [0x%x]: 0x%x 0x%x 0x%x 0x%x\n",
- i, (unsigned int)virt_to_phys(ep),
+ i, (unsigned int)(dma_rx_phy + i * desc_size),
(unsigned int)x, (unsigned int)(x >> 32),
ep->basic.des2, ep->basic.des3);
ep++;
diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.h b/drivers/net/ethernet/stmicro/stmmac/hwif.h
index b40b2e0667bb..fc5260cf27ea 100644
--- a/drivers/net/ethernet/stmicro/stmmac/hwif.h
+++ b/drivers/net/ethernet/stmicro/stmmac/hwif.h
@@ -78,7 +78,8 @@ struct stmmac_desc_ops {
/* get rx timestamp status */
int (*get_rx_timestamp_status)(void *desc, void *next_desc, u32 ats);
/* Display ring */
- void (*display_ring)(void *head, unsigned int size, bool rx);
+ void (*display_ring)(void *head, unsigned int size, bool rx,
+ unsigned int dma_rx_phy, unsigned int desc_size);
/* set MSS via context descriptor */
void (*set_mss)(struct dma_desc *p, unsigned int mss);
/* get descriptor skbuff address */
diff --git a/drivers/net/ethernet/stmicro/stmmac/norm_desc.c b/drivers/net/ethernet/stmicro/stmmac/norm_desc.c
index f083360e4ba6..c26544de0766 100644
--- a/drivers/net/ethernet/stmicro/stmmac/norm_desc.c
+++ b/drivers/net/ethernet/stmicro/stmmac/norm_desc.c
@@ -269,7 +269,8 @@ static int ndesc_get_rx_timestamp_status(void *desc, void *next_desc, u32 ats)
return 1;
}
-static void ndesc_display_ring(void *head, unsigned int size, bool rx)
+static void ndesc_display_ring(void *head, unsigned int size, bool rx,
+ unsigned int dma_rx_phy, unsigned int desc_size)
{
struct dma_desc *p = (struct dma_desc *)head;
int i;
@@ -281,7 +282,7 @@ static void ndesc_display_ring(void *head, unsigned int size, bool rx)
x = *(u64 *)p;
pr_info("%03d [0x%x]: 0x%x 0x%x 0x%x 0x%x",
- i, (unsigned int)virt_to_phys(p),
+ i, (unsigned int)(dma_rx_phy + i * desc_size),
(unsigned int)x, (unsigned int)(x >> 32),
p->des2, p->des3);
p++;
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 41d9a5a3cc9a..ca24e268f49a 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -1133,6 +1133,7 @@ static int stmmac_phy_setup(struct stmmac_priv *priv)
static void stmmac_display_rx_rings(struct stmmac_priv *priv)
{
u32 rx_cnt = priv->plat->rx_queues_to_use;
+ unsigned int desc_size;
void *head_rx;
u32 queue;
@@ -1142,19 +1143,24 @@ static void stmmac_display_rx_rings(struct stmmac_priv *priv)
pr_info("\tRX Queue %u rings\n", queue);
- if (priv->extend_desc)
+ if (priv->extend_desc) {
head_rx = (void *)rx_q->dma_erx;
- else
+ desc_size = sizeof(struct dma_extended_desc);
+ } else {
head_rx = (void *)rx_q->dma_rx;
+ desc_size = sizeof(struct dma_desc);
+ }
/* Display RX ring */
- stmmac_display_ring(priv, head_rx, priv->dma_rx_size, true);
+ stmmac_display_ring(priv, head_rx, priv->dma_rx_size, true,
+ rx_q->dma_rx_phy, desc_size);
}
}
static void stmmac_display_tx_rings(struct stmmac_priv *priv)
{
u32 tx_cnt = priv->plat->tx_queues_to_use;
+ unsigned int desc_size;
void *head_tx;
u32 queue;
@@ -1164,14 +1170,19 @@ static void stmmac_display_tx_rings(struct stmmac_priv *priv)
pr_info("\tTX Queue %d rings\n", queue);
- if (priv->extend_desc)
+ if (priv->extend_desc) {
head_tx = (void *)tx_q->dma_etx;
- else if (tx_q->tbs & STMMAC_TBS_AVAIL)
+ desc_size = sizeof(struct dma_extended_desc);
+ } else if (tx_q->tbs & STMMAC_TBS_AVAIL) {
head_tx = (void *)tx_q->dma_entx;
- else
+ desc_size = sizeof(struct dma_edesc);
+ } else {
head_tx = (void *)tx_q->dma_tx;
+ desc_size = sizeof(struct dma_desc);
+ }
- stmmac_display_ring(priv, head_tx, priv->dma_tx_size, false);
+ stmmac_display_ring(priv, head_tx, priv->dma_tx_size, false,
+ tx_q->dma_tx_phy, desc_size);
}
}
@@ -3736,18 +3747,23 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue)
unsigned int count = 0, error = 0, len = 0;
int status = 0, coe = priv->hw->rx_csum;
unsigned int next_entry = rx_q->cur_rx;
+ unsigned int desc_size;
struct sk_buff *skb = NULL;
if (netif_msg_rx_status(priv)) {
void *rx_head;
netdev_dbg(priv->dev, "%s: descriptor ring:\n", __func__);
- if (priv->extend_desc)
+ if (priv->extend_desc) {
rx_head = (void *)rx_q->dma_erx;
- else
+ desc_size = sizeof(struct dma_extended_desc);
+ } else {
rx_head = (void *)rx_q->dma_rx;
+ desc_size = sizeof(struct dma_desc);
+ }
- stmmac_display_ring(priv, rx_head, priv->dma_rx_size, true);
+ stmmac_display_ring(priv, rx_head, priv->dma_rx_size, true,
+ rx_q->dma_rx_phy, desc_size);
}
while (count < limit) {
unsigned int buf1_len = 0, buf2_len = 0;
@@ -4314,7 +4330,7 @@ static int stmmac_set_mac_address(struct net_device *ndev, void *addr)
static struct dentry *stmmac_fs_dir;
static void sysfs_display_ring(void *head, int size, int extend_desc,
- struct seq_file *seq)
+ struct seq_file *seq, unsigned int dma_phy_addr)
{
int i;
struct dma_extended_desc *ep = (struct dma_extended_desc *)head;
@@ -4323,7 +4339,7 @@ static void sysfs_display_ring(void *head, int size, int extend_desc,
for (i = 0; i < size; i++) {
if (extend_desc) {
seq_printf(seq, "%d [0x%x]: 0x%x 0x%x 0x%x 0x%x\n",
- i, (unsigned int)virt_to_phys(ep),
+ i, (unsigned int)(dma_phy_addr + i * sizeof(ep)),
le32_to_cpu(ep->basic.des0),
le32_to_cpu(ep->basic.des1),
le32_to_cpu(ep->basic.des2),
@@ -4331,7 +4347,7 @@ static void sysfs_display_ring(void *head, int size, int extend_desc,
ep++;
} else {
seq_printf(seq, "%d [0x%x]: 0x%x 0x%x 0x%x 0x%x\n",
- i, (unsigned int)virt_to_phys(p),
+ i, (unsigned int)(dma_phy_addr + i * sizeof(p)),
le32_to_cpu(p->des0), le32_to_cpu(p->des1),
le32_to_cpu(p->des2), le32_to_cpu(p->des3));
p++;
@@ -4359,11 +4375,11 @@ static int stmmac_rings_status_show(struct seq_file *seq, void *v)
if (priv->extend_desc) {
seq_printf(seq, "Extended descriptor ring:\n");
sysfs_display_ring((void *)rx_q->dma_erx,
- priv->dma_rx_size, 1, seq);
+ priv->dma_rx_size, 1, seq, rx_q->dma_rx_phy);
} else {
seq_printf(seq, "Descriptor ring:\n");
sysfs_display_ring((void *)rx_q->dma_rx,
- priv->dma_rx_size, 0, seq);
+ priv->dma_rx_size, 0, seq, rx_q->dma_rx_phy);
}
}
@@ -4375,11 +4391,11 @@ static int stmmac_rings_status_show(struct seq_file *seq, void *v)
if (priv->extend_desc) {
seq_printf(seq, "Extended descriptor ring:\n");
sysfs_display_ring((void *)tx_q->dma_etx,
- priv->dma_tx_size, 1, seq);
+ priv->dma_tx_size, 1, seq, tx_q->dma_tx_phy);
} else if (!(tx_q->tbs & STMMAC_TBS_AVAIL)) {
seq_printf(seq, "Descriptor ring:\n");
sysfs_display_ring((void *)tx_q->dma_tx,
- priv->dma_tx_size, 0, seq);
+ priv->dma_tx_size, 0, seq, tx_q->dma_tx_phy);
}
}
--
2.17.1
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