* [net-next,v3 1/6] ravb: Group descriptor types used in Rx ring
2024-03-04 11:08 [net-next,v3 0/6] ravb: Align Rx descriptor setup and maintenance Niklas Söderlund
@ 2024-03-04 11:08 ` Niklas Söderlund
2024-03-04 11:08 ` [net-next,v3 2/6] ravb: Make it clear the information relates to maximum frame size Niklas Söderlund
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Niklas Söderlund @ 2024-03-04 11:08 UTC (permalink / raw)
To: Sergey Shtylyov, David S. Miller, Eric Dumazet, Jakub Kicinski,
Paolo Abeni, Biju Das, Claudiu Beznea, Yoshihiro Shimoda, netdev
Cc: linux-renesas-soc, Niklas Söderlund, Paul Barker
The Rx ring can either be made up of normal or extended descriptors, not
a mix of the two at the same time. Make this explicit by grouping the
two variables in a rx_ring union.
The extension of the storage for more than one queue of normal
descriptors from a single to NUM_RX_QUEUE queues have no practical
effect. But aids in making the code readable as the code that uses it
already piggyback on other members of struct ravb_private that are
arrays of max length NUM_RX_QUEUE, e.g. rx_desc_dma. This will also make
further refactoring easier.
While at it, rename the normal descriptor Rx ring to make it clear it's
not strictly related to the GbEthernet E-MAC IP found in RZ/G2L, normal
descriptors could be used on R-Car SoCs too.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
---
* Changes since v2
- Fix spelling in commit message.
---
drivers/net/ethernet/renesas/ravb.h | 6 ++-
drivers/net/ethernet/renesas/ravb_main.c | 57 ++++++++++++------------
2 files changed, 33 insertions(+), 30 deletions(-)
diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index 35e642fc4b2a..aecc98282c7e 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -1092,8 +1092,10 @@ struct ravb_private {
struct ravb_desc *desc_bat;
dma_addr_t rx_desc_dma[NUM_RX_QUEUE];
dma_addr_t tx_desc_dma[NUM_TX_QUEUE];
- struct ravb_rx_desc *gbeth_rx_ring;
- struct ravb_ex_rx_desc *rx_ring[NUM_RX_QUEUE];
+ union {
+ struct ravb_rx_desc *desc;
+ struct ravb_ex_rx_desc *ex_desc;
+ } rx_ring[NUM_RX_QUEUE];
struct ravb_tx_desc *tx_ring[NUM_TX_QUEUE];
void *tx_align[NUM_TX_QUEUE];
struct sk_buff *rx_1st_skb;
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index f9fb772b05c7..c25a80f4d3b9 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -241,11 +241,11 @@ static void ravb_rx_ring_free_gbeth(struct net_device *ndev, int q)
unsigned int ring_size;
unsigned int i;
- if (!priv->gbeth_rx_ring)
+ if (!priv->rx_ring[q].desc)
return;
for (i = 0; i < priv->num_rx_ring[q]; i++) {
- struct ravb_rx_desc *desc = &priv->gbeth_rx_ring[i];
+ struct ravb_rx_desc *desc = &priv->rx_ring[q].desc[i];
if (!dma_mapping_error(ndev->dev.parent,
le32_to_cpu(desc->dptr)))
@@ -255,9 +255,9 @@ static void ravb_rx_ring_free_gbeth(struct net_device *ndev, int q)
DMA_FROM_DEVICE);
}
ring_size = sizeof(struct ravb_rx_desc) * (priv->num_rx_ring[q] + 1);
- dma_free_coherent(ndev->dev.parent, ring_size, priv->gbeth_rx_ring,
+ dma_free_coherent(ndev->dev.parent, ring_size, priv->rx_ring[q].desc,
priv->rx_desc_dma[q]);
- priv->gbeth_rx_ring = NULL;
+ priv->rx_ring[q].desc = NULL;
}
static void ravb_rx_ring_free_rcar(struct net_device *ndev, int q)
@@ -266,11 +266,11 @@ static void ravb_rx_ring_free_rcar(struct net_device *ndev, int q)
unsigned int ring_size;
unsigned int i;
- if (!priv->rx_ring[q])
+ if (!priv->rx_ring[q].ex_desc)
return;
for (i = 0; i < priv->num_rx_ring[q]; i++) {
- struct ravb_ex_rx_desc *desc = &priv->rx_ring[q][i];
+ struct ravb_ex_rx_desc *desc = &priv->rx_ring[q].ex_desc[i];
if (!dma_mapping_error(ndev->dev.parent,
le32_to_cpu(desc->dptr)))
@@ -281,9 +281,9 @@ static void ravb_rx_ring_free_rcar(struct net_device *ndev, int q)
}
ring_size = sizeof(struct ravb_ex_rx_desc) *
(priv->num_rx_ring[q] + 1);
- dma_free_coherent(ndev->dev.parent, ring_size, priv->rx_ring[q],
+ dma_free_coherent(ndev->dev.parent, ring_size, priv->rx_ring[q].ex_desc,
priv->rx_desc_dma[q]);
- priv->rx_ring[q] = NULL;
+ priv->rx_ring[q].ex_desc = NULL;
}
/* Free skb's and DMA buffers for Ethernet AVB */
@@ -335,11 +335,11 @@ static void ravb_rx_ring_format_gbeth(struct net_device *ndev, int q)
unsigned int i;
rx_ring_size = sizeof(*rx_desc) * priv->num_rx_ring[q];
- memset(priv->gbeth_rx_ring, 0, rx_ring_size);
+ memset(priv->rx_ring[q].desc, 0, rx_ring_size);
/* Build RX ring buffer */
for (i = 0; i < priv->num_rx_ring[q]; i++) {
/* RX descriptor */
- rx_desc = &priv->gbeth_rx_ring[i];
+ rx_desc = &priv->rx_ring[q].desc[i];
rx_desc->ds_cc = cpu_to_le16(GBETH_RX_DESC_DATA_SIZE);
dma_addr = dma_map_single(ndev->dev.parent, priv->rx_skb[q][i]->data,
GBETH_RX_BUFF_MAX,
@@ -352,7 +352,7 @@ static void ravb_rx_ring_format_gbeth(struct net_device *ndev, int q)
rx_desc->dptr = cpu_to_le32(dma_addr);
rx_desc->die_dt = DT_FEMPTY;
}
- rx_desc = &priv->gbeth_rx_ring[i];
+ rx_desc = &priv->rx_ring[q].desc[i];
rx_desc->dptr = cpu_to_le32((u32)priv->rx_desc_dma[q]);
rx_desc->die_dt = DT_LINKFIX; /* type */
}
@@ -365,11 +365,11 @@ static void ravb_rx_ring_format_rcar(struct net_device *ndev, int q)
dma_addr_t dma_addr;
unsigned int i;
- memset(priv->rx_ring[q], 0, rx_ring_size);
+ memset(priv->rx_ring[q].ex_desc, 0, rx_ring_size);
/* Build RX ring buffer */
for (i = 0; i < priv->num_rx_ring[q]; i++) {
/* RX descriptor */
- rx_desc = &priv->rx_ring[q][i];
+ rx_desc = &priv->rx_ring[q].ex_desc[i];
rx_desc->ds_cc = cpu_to_le16(RX_BUF_SZ);
dma_addr = dma_map_single(ndev->dev.parent, priv->rx_skb[q][i]->data,
RX_BUF_SZ,
@@ -382,7 +382,7 @@ static void ravb_rx_ring_format_rcar(struct net_device *ndev, int q)
rx_desc->dptr = cpu_to_le32(dma_addr);
rx_desc->die_dt = DT_FEMPTY;
}
- rx_desc = &priv->rx_ring[q][i];
+ rx_desc = &priv->rx_ring[q].ex_desc[i];
rx_desc->dptr = cpu_to_le32((u32)priv->rx_desc_dma[q]);
rx_desc->die_dt = DT_LINKFIX; /* type */
}
@@ -437,10 +437,10 @@ static void *ravb_alloc_rx_desc_gbeth(struct net_device *ndev, int q)
ring_size = sizeof(struct ravb_rx_desc) * (priv->num_rx_ring[q] + 1);
- priv->gbeth_rx_ring = dma_alloc_coherent(ndev->dev.parent, ring_size,
- &priv->rx_desc_dma[q],
- GFP_KERNEL);
- return priv->gbeth_rx_ring;
+ priv->rx_ring[q].desc = dma_alloc_coherent(ndev->dev.parent, ring_size,
+ &priv->rx_desc_dma[q],
+ GFP_KERNEL);
+ return priv->rx_ring[q].desc;
}
static void *ravb_alloc_rx_desc_rcar(struct net_device *ndev, int q)
@@ -450,10 +450,11 @@ static void *ravb_alloc_rx_desc_rcar(struct net_device *ndev, int q)
ring_size = sizeof(struct ravb_ex_rx_desc) * (priv->num_rx_ring[q] + 1);
- priv->rx_ring[q] = dma_alloc_coherent(ndev->dev.parent, ring_size,
- &priv->rx_desc_dma[q],
- GFP_KERNEL);
- return priv->rx_ring[q];
+ priv->rx_ring[q].ex_desc = dma_alloc_coherent(ndev->dev.parent,
+ ring_size,
+ &priv->rx_desc_dma[q],
+ GFP_KERNEL);
+ return priv->rx_ring[q].ex_desc;
}
/* Init skb and descriptor buffer for Ethernet AVB */
@@ -830,7 +831,7 @@ static bool ravb_rx_gbeth(struct net_device *ndev, int *quota, int q)
limit = priv->dirty_rx[q] + priv->num_rx_ring[q] - priv->cur_rx[q];
stats = &priv->stats[q];
- desc = &priv->gbeth_rx_ring[entry];
+ desc = &priv->rx_ring[q].desc[entry];
for (i = 0; i < limit && rx_packets < *quota && desc->die_dt != DT_FEMPTY; i++) {
/* Descriptor type must be checked before all other reads */
dma_rmb();
@@ -901,13 +902,13 @@ static bool ravb_rx_gbeth(struct net_device *ndev, int *quota, int q)
}
entry = (++priv->cur_rx[q]) % priv->num_rx_ring[q];
- desc = &priv->gbeth_rx_ring[entry];
+ desc = &priv->rx_ring[q].desc[entry];
}
/* Refill the RX ring buffers. */
for (; priv->cur_rx[q] - priv->dirty_rx[q] > 0; priv->dirty_rx[q]++) {
entry = priv->dirty_rx[q] % priv->num_rx_ring[q];
- desc = &priv->gbeth_rx_ring[entry];
+ desc = &priv->rx_ring[q].desc[entry];
desc->ds_cc = cpu_to_le16(GBETH_RX_DESC_DATA_SIZE);
if (!priv->rx_skb[q][entry]) {
@@ -957,7 +958,7 @@ static bool ravb_rx_rcar(struct net_device *ndev, int *quota, int q)
boguscnt = min(boguscnt, *quota);
limit = boguscnt;
- desc = &priv->rx_ring[q][entry];
+ desc = &priv->rx_ring[q].ex_desc[entry];
while (desc->die_dt != DT_FEMPTY) {
/* Descriptor type must be checked before all other reads */
dma_rmb();
@@ -1017,13 +1018,13 @@ static bool ravb_rx_rcar(struct net_device *ndev, int *quota, int q)
}
entry = (++priv->cur_rx[q]) % priv->num_rx_ring[q];
- desc = &priv->rx_ring[q][entry];
+ desc = &priv->rx_ring[q].ex_desc[entry];
}
/* Refill the RX ring buffers. */
for (; priv->cur_rx[q] - priv->dirty_rx[q] > 0; priv->dirty_rx[q]++) {
entry = priv->dirty_rx[q] % priv->num_rx_ring[q];
- desc = &priv->rx_ring[q][entry];
+ desc = &priv->rx_ring[q].ex_desc[entry];
desc->ds_cc = cpu_to_le16(RX_BUF_SZ);
if (!priv->rx_skb[q][entry]) {
--
2.44.0
^ permalink raw reply related [flat|nested] 8+ messages in thread* [net-next,v3 2/6] ravb: Make it clear the information relates to maximum frame size
2024-03-04 11:08 [net-next,v3 0/6] ravb: Align Rx descriptor setup and maintenance Niklas Söderlund
2024-03-04 11:08 ` [net-next,v3 1/6] ravb: Group descriptor types used in Rx ring Niklas Söderlund
@ 2024-03-04 11:08 ` Niklas Söderlund
2024-03-04 11:08 ` [net-next,v3 3/6] ravb: Create helper to allocate skb and align it Niklas Söderlund
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Niklas Söderlund @ 2024-03-04 11:08 UTC (permalink / raw)
To: Sergey Shtylyov, David S. Miller, Eric Dumazet, Jakub Kicinski,
Paolo Abeni, Biju Das, Claudiu Beznea, Yoshihiro Shimoda, netdev
Cc: linux-renesas-soc, Niklas Söderlund, Paul Barker
The struct member rx_max_buf_size was added before split descriptor
support was added. It is unclear if the value describes the full skb
frame buffer or the data descriptor buffer which can be combined into a
single skb.
Rename it to make it clear it referees to the maximum frame size and can
cover multiple descriptors.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
---
* Changes since v2
- Fix spelling in commit message.
---
drivers/net/ethernet/renesas/ravb.h | 2 +-
drivers/net/ethernet/renesas/ravb_main.c | 11 ++++++-----
2 files changed, 7 insertions(+), 6 deletions(-)
diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index aecc98282c7e..7f9e8b2c012a 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -1059,7 +1059,7 @@ struct ravb_hw_info {
int stats_len;
size_t max_rx_len;
u32 tccr_mask;
- u32 rx_max_buf_size;
+ u32 rx_max_frame_size;
unsigned aligned_tx: 1;
/* hardware features */
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index c25a80f4d3b9..5c72b780d623 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -2684,7 +2684,7 @@ static const struct ravb_hw_info ravb_gen3_hw_info = {
.stats_len = ARRAY_SIZE(ravb_gstrings_stats),
.max_rx_len = RX_BUF_SZ + RAVB_ALIGN - 1,
.tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
- .rx_max_buf_size = SZ_2K,
+ .rx_max_frame_size = SZ_2K,
.internal_delay = 1,
.tx_counters = 1,
.multi_irqs = 1,
@@ -2710,7 +2710,7 @@ static const struct ravb_hw_info ravb_gen2_hw_info = {
.stats_len = ARRAY_SIZE(ravb_gstrings_stats),
.max_rx_len = RX_BUF_SZ + RAVB_ALIGN - 1,
.tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
- .rx_max_buf_size = SZ_2K,
+ .rx_max_frame_size = SZ_2K,
.aligned_tx = 1,
.gptp = 1,
.nc_queues = 1,
@@ -2733,7 +2733,7 @@ static const struct ravb_hw_info ravb_rzv2m_hw_info = {
.stats_len = ARRAY_SIZE(ravb_gstrings_stats),
.max_rx_len = RX_BUF_SZ + RAVB_ALIGN - 1,
.tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
- .rx_max_buf_size = SZ_2K,
+ .rx_max_frame_size = SZ_2K,
.multi_irqs = 1,
.err_mgmt_irqs = 1,
.gptp = 1,
@@ -2758,7 +2758,7 @@ static const struct ravb_hw_info gbeth_hw_info = {
.stats_len = ARRAY_SIZE(ravb_gstrings_stats_gbeth),
.max_rx_len = ALIGN(GBETH_RX_BUFF_MAX, RAVB_ALIGN),
.tccr_mask = TCCR_TSRQ0,
- .rx_max_buf_size = SZ_8K,
+ .rx_max_frame_size = SZ_8K,
.aligned_tx = 1,
.tx_counters = 1,
.carrier_counters = 1,
@@ -2967,7 +2967,8 @@ static int ravb_probe(struct platform_device *pdev)
priv->avb_link_active_low =
of_property_read_bool(np, "renesas,ether-link-active-low");
- ndev->max_mtu = info->rx_max_buf_size - (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN);
+ ndev->max_mtu = info->rx_max_frame_size -
+ (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN);
ndev->min_mtu = ETH_MIN_MTU;
/* FIXME: R-Car Gen2 has 4byte alignment restriction for tx buffer
--
2.44.0
^ permalink raw reply related [flat|nested] 8+ messages in thread* [net-next,v3 3/6] ravb: Create helper to allocate skb and align it
2024-03-04 11:08 [net-next,v3 0/6] ravb: Align Rx descriptor setup and maintenance Niklas Söderlund
2024-03-04 11:08 ` [net-next,v3 1/6] ravb: Group descriptor types used in Rx ring Niklas Söderlund
2024-03-04 11:08 ` [net-next,v3 2/6] ravb: Make it clear the information relates to maximum frame size Niklas Söderlund
@ 2024-03-04 11:08 ` Niklas Söderlund
2024-03-04 11:08 ` [net-next,v3 4/6] ravb: Use the max frame size from hardware info for RZ/G2L Niklas Söderlund
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Niklas Söderlund @ 2024-03-04 11:08 UTC (permalink / raw)
To: Sergey Shtylyov, David S. Miller, Eric Dumazet, Jakub Kicinski,
Paolo Abeni, Biju Das, Claudiu Beznea, Yoshihiro Shimoda, netdev
Cc: linux-renesas-soc, Niklas Söderlund, Paul Barker
The EtherAVB device requires the SKB data to be aligned to 128 bytes.
The alignment is done by allocating an skb 128 bytes larger than the
maximum frame size supported by the device and adjusting the headroom to
fit the requirement.
This code has been refactored a few times and small issues have been
added along the way. The issues are not harmful but prevent merging
parts of the Rx code which have been split in two implementations with
the addition of RZ/G2L support, a device that supports larger frame
sizes.
This change removes the need for duplicated and somewhat inaccurate
hardware alignment constrains stored in the hardware information struct
by creating a helper to handle the allocation of an skb and alignment of
an skb data.
For the R-Car class of devices the maximum frame size is 4K and each
descriptor is limited to 2K of data. The current implementation does not
support split descriptors, this limits the frame size to 2K. The
current hardware information however records the descriptor size just
under 2K due to bad understanding of the device when larger MTUs where
added.
For the RZ/G2L device the maximum frame size is 8K and each descriptor
is limited to 4K of data. The current hardware information records this
correctly, but it gets the alignment constrains wrong as just aligns it
by 128, it does not extend it by 128 bytes to allow the full frame to be
stored. This works because the RZ/G2L device supports split descriptors
and allocates each skb to 8K and aligns each 4K descriptor in this
space.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
---
* Changes since v1
- Add a GFP mask argument to ravb_alloc_skb() to preserve GFP_KERNEL at
init time.
* Changes since v2
- Fix spelling in commit message.
---
drivers/net/ethernet/renesas/ravb.h | 1 -
drivers/net/ethernet/renesas/ravb_main.c | 43 +++++++++++++-----------
2 files changed, 24 insertions(+), 20 deletions(-)
diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index 7f9e8b2c012a..751bb29cd488 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -1057,7 +1057,6 @@ struct ravb_hw_info {
netdev_features_t net_hw_features;
netdev_features_t net_features;
int stats_len;
- size_t max_rx_len;
u32 tccr_mask;
u32 rx_max_frame_size;
unsigned aligned_tx: 1;
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 5c72b780d623..e6b025058847 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -113,12 +113,23 @@ static void ravb_set_rate_rcar(struct net_device *ndev)
}
}
-static void ravb_set_buffer_align(struct sk_buff *skb)
+static struct sk_buff *
+ravb_alloc_skb(struct net_device *ndev, const struct ravb_hw_info *info,
+ gfp_t gfp_mask)
{
- u32 reserve = (unsigned long)skb->data & (RAVB_ALIGN - 1);
+ struct sk_buff *skb;
+ u32 reserve;
+ skb = __netdev_alloc_skb(ndev, info->rx_max_frame_size + RAVB_ALIGN - 1,
+ gfp_mask);
+ if (!skb)
+ return NULL;
+
+ reserve = (unsigned long)skb->data & (RAVB_ALIGN - 1);
if (reserve)
skb_reserve(skb, RAVB_ALIGN - reserve);
+
+ return skb;
}
/* Get MAC address from the MAC address registers
@@ -251,7 +262,7 @@ static void ravb_rx_ring_free_gbeth(struct net_device *ndev, int q)
le32_to_cpu(desc->dptr)))
dma_unmap_single(ndev->dev.parent,
le32_to_cpu(desc->dptr),
- GBETH_RX_BUFF_MAX,
+ priv->info->rx_max_frame_size,
DMA_FROM_DEVICE);
}
ring_size = sizeof(struct ravb_rx_desc) * (priv->num_rx_ring[q] + 1);
@@ -276,7 +287,7 @@ static void ravb_rx_ring_free_rcar(struct net_device *ndev, int q)
le32_to_cpu(desc->dptr)))
dma_unmap_single(ndev->dev.parent,
le32_to_cpu(desc->dptr),
- RX_BUF_SZ,
+ priv->info->rx_max_frame_size,
DMA_FROM_DEVICE);
}
ring_size = sizeof(struct ravb_ex_rx_desc) *
@@ -342,7 +353,7 @@ static void ravb_rx_ring_format_gbeth(struct net_device *ndev, int q)
rx_desc = &priv->rx_ring[q].desc[i];
rx_desc->ds_cc = cpu_to_le16(GBETH_RX_DESC_DATA_SIZE);
dma_addr = dma_map_single(ndev->dev.parent, priv->rx_skb[q][i]->data,
- GBETH_RX_BUFF_MAX,
+ priv->info->rx_max_frame_size,
DMA_FROM_DEVICE);
/* We just set the data size to 0 for a failed mapping which
* should prevent DMA from happening...
@@ -372,7 +383,7 @@ static void ravb_rx_ring_format_rcar(struct net_device *ndev, int q)
rx_desc = &priv->rx_ring[q].ex_desc[i];
rx_desc->ds_cc = cpu_to_le16(RX_BUF_SZ);
dma_addr = dma_map_single(ndev->dev.parent, priv->rx_skb[q][i]->data,
- RX_BUF_SZ,
+ priv->info->rx_max_frame_size,
DMA_FROM_DEVICE);
/* We just set the data size to 0 for a failed mapping which
* should prevent DMA from happening...
@@ -476,10 +487,9 @@ static int ravb_ring_init(struct net_device *ndev, int q)
goto error;
for (i = 0; i < priv->num_rx_ring[q]; i++) {
- skb = __netdev_alloc_skb(ndev, info->max_rx_len, GFP_KERNEL);
+ skb = ravb_alloc_skb(ndev, info, GFP_KERNEL);
if (!skb)
goto error;
- ravb_set_buffer_align(skb);
priv->rx_skb[q][i] = skb;
}
@@ -805,7 +815,8 @@ static struct sk_buff *ravb_get_skb_gbeth(struct net_device *ndev, int entry,
skb = priv->rx_skb[RAVB_BE][entry];
priv->rx_skb[RAVB_BE][entry] = NULL;
dma_unmap_single(ndev->dev.parent, le32_to_cpu(desc->dptr),
- ALIGN(GBETH_RX_BUFF_MAX, 16), DMA_FROM_DEVICE);
+ ALIGN(priv->info->rx_max_frame_size, 16),
+ DMA_FROM_DEVICE);
return skb;
}
@@ -912,13 +923,12 @@ static bool ravb_rx_gbeth(struct net_device *ndev, int *quota, int q)
desc->ds_cc = cpu_to_le16(GBETH_RX_DESC_DATA_SIZE);
if (!priv->rx_skb[q][entry]) {
- skb = netdev_alloc_skb(ndev, info->max_rx_len);
+ skb = ravb_alloc_skb(ndev, info, GFP_ATOMIC);
if (!skb)
break;
- ravb_set_buffer_align(skb);
dma_addr = dma_map_single(ndev->dev.parent,
skb->data,
- GBETH_RX_BUFF_MAX,
+ priv->info->rx_max_frame_size,
DMA_FROM_DEVICE);
skb_checksum_none_assert(skb);
/* We just set the data size to 0 for a failed mapping
@@ -992,7 +1002,7 @@ static bool ravb_rx_rcar(struct net_device *ndev, int *quota, int q)
skb = priv->rx_skb[q][entry];
priv->rx_skb[q][entry] = NULL;
dma_unmap_single(ndev->dev.parent, le32_to_cpu(desc->dptr),
- RX_BUF_SZ,
+ priv->info->rx_max_frame_size,
DMA_FROM_DEVICE);
get_ts &= (q == RAVB_NC) ?
RAVB_RXTSTAMP_TYPE_V2_L2_EVENT :
@@ -1028,10 +1038,9 @@ static bool ravb_rx_rcar(struct net_device *ndev, int *quota, int q)
desc->ds_cc = cpu_to_le16(RX_BUF_SZ);
if (!priv->rx_skb[q][entry]) {
- skb = netdev_alloc_skb(ndev, info->max_rx_len);
+ skb = ravb_alloc_skb(ndev, info, GFP_ATOMIC);
if (!skb)
break; /* Better luck next round. */
- ravb_set_buffer_align(skb);
dma_addr = dma_map_single(ndev->dev.parent, skb->data,
le16_to_cpu(desc->ds_cc),
DMA_FROM_DEVICE);
@@ -2682,7 +2691,6 @@ static const struct ravb_hw_info ravb_gen3_hw_info = {
.net_hw_features = NETIF_F_RXCSUM,
.net_features = NETIF_F_RXCSUM,
.stats_len = ARRAY_SIZE(ravb_gstrings_stats),
- .max_rx_len = RX_BUF_SZ + RAVB_ALIGN - 1,
.tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
.rx_max_frame_size = SZ_2K,
.internal_delay = 1,
@@ -2708,7 +2716,6 @@ static const struct ravb_hw_info ravb_gen2_hw_info = {
.net_hw_features = NETIF_F_RXCSUM,
.net_features = NETIF_F_RXCSUM,
.stats_len = ARRAY_SIZE(ravb_gstrings_stats),
- .max_rx_len = RX_BUF_SZ + RAVB_ALIGN - 1,
.tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
.rx_max_frame_size = SZ_2K,
.aligned_tx = 1,
@@ -2731,7 +2738,6 @@ static const struct ravb_hw_info ravb_rzv2m_hw_info = {
.net_hw_features = NETIF_F_RXCSUM,
.net_features = NETIF_F_RXCSUM,
.stats_len = ARRAY_SIZE(ravb_gstrings_stats),
- .max_rx_len = RX_BUF_SZ + RAVB_ALIGN - 1,
.tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
.rx_max_frame_size = SZ_2K,
.multi_irqs = 1,
@@ -2756,7 +2762,6 @@ static const struct ravb_hw_info gbeth_hw_info = {
.net_hw_features = NETIF_F_RXCSUM | NETIF_F_HW_CSUM,
.net_features = NETIF_F_RXCSUM | NETIF_F_HW_CSUM,
.stats_len = ARRAY_SIZE(ravb_gstrings_stats_gbeth),
- .max_rx_len = ALIGN(GBETH_RX_BUFF_MAX, RAVB_ALIGN),
.tccr_mask = TCCR_TSRQ0,
.rx_max_frame_size = SZ_8K,
.aligned_tx = 1,
--
2.44.0
^ permalink raw reply related [flat|nested] 8+ messages in thread* [net-next,v3 4/6] ravb: Use the max frame size from hardware info for RZ/G2L
2024-03-04 11:08 [net-next,v3 0/6] ravb: Align Rx descriptor setup and maintenance Niklas Söderlund
` (2 preceding siblings ...)
2024-03-04 11:08 ` [net-next,v3 3/6] ravb: Create helper to allocate skb and align it Niklas Söderlund
@ 2024-03-04 11:08 ` Niklas Söderlund
2024-03-04 11:08 ` [net-next,v3 5/6] ravb: Move maximum Rx descriptor data usage to info struct Niklas Söderlund
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Niklas Söderlund @ 2024-03-04 11:08 UTC (permalink / raw)
To: Sergey Shtylyov, David S. Miller, Eric Dumazet, Jakub Kicinski,
Paolo Abeni, Biju Das, Claudiu Beznea, Yoshihiro Shimoda, netdev
Cc: linux-renesas-soc, Niklas Söderlund, Paul Barker
Remove the define describing the RZ/G2L maximum frame size and only use
the information in the hardware information struct. This will make it
easier to merge the R-Car and RZ/G2L code paths.
There is no functional change as both the define and the maximum frame
length in the hardware information is set to 8K.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
---
drivers/net/ethernet/renesas/ravb.h | 1 -
drivers/net/ethernet/renesas/ravb_main.c | 5 +++--
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index 751bb29cd488..7fa60fccb6ea 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -1017,7 +1017,6 @@ enum CSR2_BIT {
#define RX_BUF_SZ (2048 - ETH_FCS_LEN + sizeof(__sum16))
-#define GBETH_RX_BUFF_MAX 8192
#define GBETH_RX_DESC_DATA_SIZE 4080
struct ravb_tstamp_skb {
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index e6b025058847..45383635e8e2 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -568,7 +568,7 @@ static void ravb_emac_init_gbeth(struct net_device *ndev)
}
/* Receive frame limit set register */
- ravb_write(ndev, GBETH_RX_BUFF_MAX + ETH_FCS_LEN, RFLR);
+ ravb_write(ndev, priv->info->rx_max_frame_size + ETH_FCS_LEN, RFLR);
/* EMAC Mode: PAUSE prohibition; Duplex; TX; RX; CRC Pass Through */
ravb_write(ndev, ECMR_ZPF | ((priv->duplex > 0) ? ECMR_DM : 0) |
@@ -629,6 +629,7 @@ static void ravb_emac_init(struct net_device *ndev)
static int ravb_dmac_init_gbeth(struct net_device *ndev)
{
+ struct ravb_private *priv = netdev_priv(ndev);
int error;
error = ravb_ring_init(ndev, RAVB_BE);
@@ -642,7 +643,7 @@ static int ravb_dmac_init_gbeth(struct net_device *ndev)
ravb_write(ndev, 0x60000000, RCR);
/* Set Max Frame Length (RTC) */
- ravb_write(ndev, 0x7ffc0000 | GBETH_RX_BUFF_MAX, RTC);
+ ravb_write(ndev, 0x7ffc0000 | priv->info->rx_max_frame_size, RTC);
/* Set FIFO size */
ravb_write(ndev, 0x00222200, TGC);
--
2.44.0
^ permalink raw reply related [flat|nested] 8+ messages in thread* [net-next,v3 5/6] ravb: Move maximum Rx descriptor data usage to info struct
2024-03-04 11:08 [net-next,v3 0/6] ravb: Align Rx descriptor setup and maintenance Niklas Söderlund
` (3 preceding siblings ...)
2024-03-04 11:08 ` [net-next,v3 4/6] ravb: Use the max frame size from hardware info for RZ/G2L Niklas Söderlund
@ 2024-03-04 11:08 ` Niklas Söderlund
2024-03-04 11:08 ` [net-next,v3 6/6] ravb: Unify Rx ring maintenance code paths Niklas Söderlund
2024-03-06 11:30 ` [net-next,v3 0/6] ravb: Align Rx descriptor setup and maintenance patchwork-bot+netdevbpf
6 siblings, 0 replies; 8+ messages in thread
From: Niklas Söderlund @ 2024-03-04 11:08 UTC (permalink / raw)
To: Sergey Shtylyov, David S. Miller, Eric Dumazet, Jakub Kicinski,
Paolo Abeni, Biju Das, Claudiu Beznea, Yoshihiro Shimoda, netdev
Cc: linux-renesas-soc, Niklas Söderlund, Paul Barker
To make it possible to merge the R-Car and RZ/G2L code paths move the
maximum usable size of a single Rx descriptor data slice into the
hardware information instead of using two different defines in the two
different code paths.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
---
* Changes since v1
- Use SZ_2K macro instead of 2048 directly to align the style of the
rest of the members in struct ravb_hw_info.
* Changes since v2
- Fix spelling in commit message.
---
drivers/net/ethernet/renesas/ravb.h | 5 +----
drivers/net/ethernet/renesas/ravb_main.c | 12 ++++++++----
2 files changed, 9 insertions(+), 8 deletions(-)
diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index 7fa60fccb6ea..b12b379baf5a 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -1015,10 +1015,6 @@ enum CSR2_BIT {
#define NUM_RX_QUEUE 2
#define NUM_TX_QUEUE 2
-#define RX_BUF_SZ (2048 - ETH_FCS_LEN + sizeof(__sum16))
-
-#define GBETH_RX_DESC_DATA_SIZE 4080
-
struct ravb_tstamp_skb {
struct list_head list;
struct sk_buff *skb;
@@ -1058,6 +1054,7 @@ struct ravb_hw_info {
int stats_len;
u32 tccr_mask;
u32 rx_max_frame_size;
+ u32 rx_max_desc_use;
unsigned aligned_tx: 1;
/* hardware features */
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 45383635e8e2..4ef4be9e152e 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -351,7 +351,7 @@ static void ravb_rx_ring_format_gbeth(struct net_device *ndev, int q)
for (i = 0; i < priv->num_rx_ring[q]; i++) {
/* RX descriptor */
rx_desc = &priv->rx_ring[q].desc[i];
- rx_desc->ds_cc = cpu_to_le16(GBETH_RX_DESC_DATA_SIZE);
+ rx_desc->ds_cc = cpu_to_le16(priv->info->rx_max_desc_use);
dma_addr = dma_map_single(ndev->dev.parent, priv->rx_skb[q][i]->data,
priv->info->rx_max_frame_size,
DMA_FROM_DEVICE);
@@ -381,7 +381,7 @@ static void ravb_rx_ring_format_rcar(struct net_device *ndev, int q)
for (i = 0; i < priv->num_rx_ring[q]; i++) {
/* RX descriptor */
rx_desc = &priv->rx_ring[q].ex_desc[i];
- rx_desc->ds_cc = cpu_to_le16(RX_BUF_SZ);
+ rx_desc->ds_cc = cpu_to_le16(priv->info->rx_max_desc_use);
dma_addr = dma_map_single(ndev->dev.parent, priv->rx_skb[q][i]->data,
priv->info->rx_max_frame_size,
DMA_FROM_DEVICE);
@@ -921,7 +921,7 @@ static bool ravb_rx_gbeth(struct net_device *ndev, int *quota, int q)
for (; priv->cur_rx[q] - priv->dirty_rx[q] > 0; priv->dirty_rx[q]++) {
entry = priv->dirty_rx[q] % priv->num_rx_ring[q];
desc = &priv->rx_ring[q].desc[entry];
- desc->ds_cc = cpu_to_le16(GBETH_RX_DESC_DATA_SIZE);
+ desc->ds_cc = cpu_to_le16(priv->info->rx_max_desc_use);
if (!priv->rx_skb[q][entry]) {
skb = ravb_alloc_skb(ndev, info, GFP_ATOMIC);
@@ -1036,7 +1036,7 @@ static bool ravb_rx_rcar(struct net_device *ndev, int *quota, int q)
for (; priv->cur_rx[q] - priv->dirty_rx[q] > 0; priv->dirty_rx[q]++) {
entry = priv->dirty_rx[q] % priv->num_rx_ring[q];
desc = &priv->rx_ring[q].ex_desc[entry];
- desc->ds_cc = cpu_to_le16(RX_BUF_SZ);
+ desc->ds_cc = cpu_to_le16(priv->info->rx_max_desc_use);
if (!priv->rx_skb[q][entry]) {
skb = ravb_alloc_skb(ndev, info, GFP_ATOMIC);
@@ -2694,6 +2694,7 @@ static const struct ravb_hw_info ravb_gen3_hw_info = {
.stats_len = ARRAY_SIZE(ravb_gstrings_stats),
.tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
.rx_max_frame_size = SZ_2K,
+ .rx_max_desc_use = SZ_2K - ETH_FCS_LEN + sizeof(__sum16),
.internal_delay = 1,
.tx_counters = 1,
.multi_irqs = 1,
@@ -2719,6 +2720,7 @@ static const struct ravb_hw_info ravb_gen2_hw_info = {
.stats_len = ARRAY_SIZE(ravb_gstrings_stats),
.tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
.rx_max_frame_size = SZ_2K,
+ .rx_max_desc_use = SZ_2K - ETH_FCS_LEN + sizeof(__sum16),
.aligned_tx = 1,
.gptp = 1,
.nc_queues = 1,
@@ -2741,6 +2743,7 @@ static const struct ravb_hw_info ravb_rzv2m_hw_info = {
.stats_len = ARRAY_SIZE(ravb_gstrings_stats),
.tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
.rx_max_frame_size = SZ_2K,
+ .rx_max_desc_use = SZ_2K - ETH_FCS_LEN + sizeof(__sum16),
.multi_irqs = 1,
.err_mgmt_irqs = 1,
.gptp = 1,
@@ -2765,6 +2768,7 @@ static const struct ravb_hw_info gbeth_hw_info = {
.stats_len = ARRAY_SIZE(ravb_gstrings_stats_gbeth),
.tccr_mask = TCCR_TSRQ0,
.rx_max_frame_size = SZ_8K,
+ .rx_max_desc_use = 4080,
.aligned_tx = 1,
.tx_counters = 1,
.carrier_counters = 1,
--
2.44.0
^ permalink raw reply related [flat|nested] 8+ messages in thread* [net-next,v3 6/6] ravb: Unify Rx ring maintenance code paths
2024-03-04 11:08 [net-next,v3 0/6] ravb: Align Rx descriptor setup and maintenance Niklas Söderlund
` (4 preceding siblings ...)
2024-03-04 11:08 ` [net-next,v3 5/6] ravb: Move maximum Rx descriptor data usage to info struct Niklas Söderlund
@ 2024-03-04 11:08 ` Niklas Söderlund
2024-03-06 11:30 ` [net-next,v3 0/6] ravb: Align Rx descriptor setup and maintenance patchwork-bot+netdevbpf
6 siblings, 0 replies; 8+ messages in thread
From: Niklas Söderlund @ 2024-03-04 11:08 UTC (permalink / raw)
To: Sergey Shtylyov, David S. Miller, Eric Dumazet, Jakub Kicinski,
Paolo Abeni, Biju Das, Claudiu Beznea, Yoshihiro Shimoda, netdev
Cc: linux-renesas-soc, Niklas Söderlund, Paul Barker
The R-Car and RZ/G2L Rx code paths were split in two separate
implementations when support for RZ/G2L was added due to the fact that
R-Car uses the extended descriptor format while RZ/G2L uses normal
descriptors. This has led to a duplication of Rx logic with the only
difference being the different Rx descriptors types used. The
implementation however neglects to take into account that extended
descriptors are normal descriptors with additional metadata at the end
to carry hardware timestamp information.
The hardware timestamp information is only consumed in the R-Car Rx
loop and all the maintenance code around the Rx ring can be shared
between the two implementations if the difference in descriptor length
is carefully considered.
This change merges the two implementations for Rx ring maintenance by
adding a method to access both types of descriptors as normal
descriptors, as this part covers all the fields needed for Rx ring
maintenance the only difference between using normal or extended
descriptor is the size of the memory region to allocate/free and the
step size between each descriptor in the ring.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
---
* Changes since v1
- Correct the ring size calculation in ravb_rx_ring_format() which was
not updated in v1.
* Changes since v2
- Fix spelling in commit message.
---
drivers/net/ethernet/renesas/ravb.h | 5 +-
drivers/net/ethernet/renesas/ravb_main.c | 134 ++++++-----------------
2 files changed, 33 insertions(+), 106 deletions(-)
diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index b12b379baf5a..b48935ec7e28 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -1039,9 +1039,6 @@ struct ravb_ptp {
};
struct ravb_hw_info {
- void (*rx_ring_free)(struct net_device *ndev, int q);
- void (*rx_ring_format)(struct net_device *ndev, int q);
- void *(*alloc_rx_desc)(struct net_device *ndev, int q);
bool (*receive)(struct net_device *ndev, int *quota, int q);
void (*set_rate)(struct net_device *ndev);
int (*set_feature)(struct net_device *ndev, netdev_features_t features);
@@ -1055,6 +1052,7 @@ struct ravb_hw_info {
u32 tccr_mask;
u32 rx_max_frame_size;
u32 rx_max_desc_use;
+ u32 rx_desc_size;
unsigned aligned_tx: 1;
/* hardware features */
@@ -1090,6 +1088,7 @@ struct ravb_private {
union {
struct ravb_rx_desc *desc;
struct ravb_ex_rx_desc *ex_desc;
+ void *raw;
} rx_ring[NUM_RX_QUEUE];
struct ravb_tx_desc *tx_ring[NUM_TX_QUEUE];
void *tx_align[NUM_TX_QUEUE];
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 4ef4be9e152e..fa48ff4aba2d 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -202,6 +202,13 @@ static const struct mdiobb_ops bb_ops = {
.get_mdio_data = ravb_get_mdio_data,
};
+static struct ravb_rx_desc *
+ravb_rx_get_desc(struct ravb_private *priv, unsigned int q,
+ unsigned int i)
+{
+ return priv->rx_ring[q].raw + priv->info->rx_desc_size * i;
+}
+
/* Free TX skb function for AVB-IP */
static int ravb_tx_free(struct net_device *ndev, int q, bool free_txed_only)
{
@@ -246,17 +253,17 @@ static int ravb_tx_free(struct net_device *ndev, int q, bool free_txed_only)
return free_num;
}
-static void ravb_rx_ring_free_gbeth(struct net_device *ndev, int q)
+static void ravb_rx_ring_free(struct net_device *ndev, int q)
{
struct ravb_private *priv = netdev_priv(ndev);
unsigned int ring_size;
unsigned int i;
- if (!priv->rx_ring[q].desc)
+ if (!priv->rx_ring[q].raw)
return;
for (i = 0; i < priv->num_rx_ring[q]; i++) {
- struct ravb_rx_desc *desc = &priv->rx_ring[q].desc[i];
+ struct ravb_rx_desc *desc = ravb_rx_get_desc(priv, q, i);
if (!dma_mapping_error(ndev->dev.parent,
le32_to_cpu(desc->dptr)))
@@ -265,48 +272,21 @@ static void ravb_rx_ring_free_gbeth(struct net_device *ndev, int q)
priv->info->rx_max_frame_size,
DMA_FROM_DEVICE);
}
- ring_size = sizeof(struct ravb_rx_desc) * (priv->num_rx_ring[q] + 1);
- dma_free_coherent(ndev->dev.parent, ring_size, priv->rx_ring[q].desc,
+ ring_size = priv->info->rx_desc_size * (priv->num_rx_ring[q] + 1);
+ dma_free_coherent(ndev->dev.parent, ring_size, priv->rx_ring[q].raw,
priv->rx_desc_dma[q]);
- priv->rx_ring[q].desc = NULL;
-}
-
-static void ravb_rx_ring_free_rcar(struct net_device *ndev, int q)
-{
- struct ravb_private *priv = netdev_priv(ndev);
- unsigned int ring_size;
- unsigned int i;
-
- if (!priv->rx_ring[q].ex_desc)
- return;
-
- for (i = 0; i < priv->num_rx_ring[q]; i++) {
- struct ravb_ex_rx_desc *desc = &priv->rx_ring[q].ex_desc[i];
-
- if (!dma_mapping_error(ndev->dev.parent,
- le32_to_cpu(desc->dptr)))
- dma_unmap_single(ndev->dev.parent,
- le32_to_cpu(desc->dptr),
- priv->info->rx_max_frame_size,
- DMA_FROM_DEVICE);
- }
- ring_size = sizeof(struct ravb_ex_rx_desc) *
- (priv->num_rx_ring[q] + 1);
- dma_free_coherent(ndev->dev.parent, ring_size, priv->rx_ring[q].ex_desc,
- priv->rx_desc_dma[q]);
- priv->rx_ring[q].ex_desc = NULL;
+ priv->rx_ring[q].raw = NULL;
}
/* Free skb's and DMA buffers for Ethernet AVB */
static void ravb_ring_free(struct net_device *ndev, int q)
{
struct ravb_private *priv = netdev_priv(ndev);
- const struct ravb_hw_info *info = priv->info;
unsigned int num_tx_desc = priv->num_tx_desc;
unsigned int ring_size;
unsigned int i;
- info->rx_ring_free(ndev, q);
+ ravb_rx_ring_free(ndev, q);
if (priv->tx_ring[q]) {
ravb_tx_free(ndev, q, false);
@@ -337,7 +317,7 @@ static void ravb_ring_free(struct net_device *ndev, int q)
priv->tx_skb[q] = NULL;
}
-static void ravb_rx_ring_format_gbeth(struct net_device *ndev, int q)
+static void ravb_rx_ring_format(struct net_device *ndev, int q)
{
struct ravb_private *priv = netdev_priv(ndev);
struct ravb_rx_desc *rx_desc;
@@ -345,12 +325,12 @@ static void ravb_rx_ring_format_gbeth(struct net_device *ndev, int q)
dma_addr_t dma_addr;
unsigned int i;
- rx_ring_size = sizeof(*rx_desc) * priv->num_rx_ring[q];
- memset(priv->rx_ring[q].desc, 0, rx_ring_size);
+ rx_ring_size = priv->info->rx_desc_size * priv->num_rx_ring[q];
+ memset(priv->rx_ring[q].raw, 0, rx_ring_size);
/* Build RX ring buffer */
for (i = 0; i < priv->num_rx_ring[q]; i++) {
/* RX descriptor */
- rx_desc = &priv->rx_ring[q].desc[i];
+ rx_desc = ravb_rx_get_desc(priv, q, i);
rx_desc->ds_cc = cpu_to_le16(priv->info->rx_max_desc_use);
dma_addr = dma_map_single(ndev->dev.parent, priv->rx_skb[q][i]->data,
priv->info->rx_max_frame_size,
@@ -363,37 +343,7 @@ static void ravb_rx_ring_format_gbeth(struct net_device *ndev, int q)
rx_desc->dptr = cpu_to_le32(dma_addr);
rx_desc->die_dt = DT_FEMPTY;
}
- rx_desc = &priv->rx_ring[q].desc[i];
- rx_desc->dptr = cpu_to_le32((u32)priv->rx_desc_dma[q]);
- rx_desc->die_dt = DT_LINKFIX; /* type */
-}
-
-static void ravb_rx_ring_format_rcar(struct net_device *ndev, int q)
-{
- struct ravb_private *priv = netdev_priv(ndev);
- struct ravb_ex_rx_desc *rx_desc;
- unsigned int rx_ring_size = sizeof(*rx_desc) * priv->num_rx_ring[q];
- dma_addr_t dma_addr;
- unsigned int i;
-
- memset(priv->rx_ring[q].ex_desc, 0, rx_ring_size);
- /* Build RX ring buffer */
- for (i = 0; i < priv->num_rx_ring[q]; i++) {
- /* RX descriptor */
- rx_desc = &priv->rx_ring[q].ex_desc[i];
- rx_desc->ds_cc = cpu_to_le16(priv->info->rx_max_desc_use);
- dma_addr = dma_map_single(ndev->dev.parent, priv->rx_skb[q][i]->data,
- priv->info->rx_max_frame_size,
- DMA_FROM_DEVICE);
- /* We just set the data size to 0 for a failed mapping which
- * should prevent DMA from happening...
- */
- if (dma_mapping_error(ndev->dev.parent, dma_addr))
- rx_desc->ds_cc = cpu_to_le16(0);
- rx_desc->dptr = cpu_to_le32(dma_addr);
- rx_desc->die_dt = DT_FEMPTY;
- }
- rx_desc = &priv->rx_ring[q].ex_desc[i];
+ rx_desc = ravb_rx_get_desc(priv, q, i);
rx_desc->dptr = cpu_to_le32((u32)priv->rx_desc_dma[q]);
rx_desc->die_dt = DT_LINKFIX; /* type */
}
@@ -402,7 +352,6 @@ static void ravb_rx_ring_format_rcar(struct net_device *ndev, int q)
static void ravb_ring_format(struct net_device *ndev, int q)
{
struct ravb_private *priv = netdev_priv(ndev);
- const struct ravb_hw_info *info = priv->info;
unsigned int num_tx_desc = priv->num_tx_desc;
struct ravb_tx_desc *tx_desc;
struct ravb_desc *desc;
@@ -415,7 +364,7 @@ static void ravb_ring_format(struct net_device *ndev, int q)
priv->dirty_rx[q] = 0;
priv->dirty_tx[q] = 0;
- info->rx_ring_format(ndev, q);
+ ravb_rx_ring_format(ndev, q);
memset(priv->tx_ring[q], 0, tx_ring_size);
/* Build TX ring buffer */
@@ -441,31 +390,18 @@ static void ravb_ring_format(struct net_device *ndev, int q)
desc->dptr = cpu_to_le32((u32)priv->tx_desc_dma[q]);
}
-static void *ravb_alloc_rx_desc_gbeth(struct net_device *ndev, int q)
+static void *ravb_alloc_rx_desc(struct net_device *ndev, int q)
{
struct ravb_private *priv = netdev_priv(ndev);
unsigned int ring_size;
- ring_size = sizeof(struct ravb_rx_desc) * (priv->num_rx_ring[q] + 1);
+ ring_size = priv->info->rx_desc_size * (priv->num_rx_ring[q] + 1);
- priv->rx_ring[q].desc = dma_alloc_coherent(ndev->dev.parent, ring_size,
- &priv->rx_desc_dma[q],
- GFP_KERNEL);
- return priv->rx_ring[q].desc;
-}
+ priv->rx_ring[q].raw = dma_alloc_coherent(ndev->dev.parent, ring_size,
+ &priv->rx_desc_dma[q],
+ GFP_KERNEL);
-static void *ravb_alloc_rx_desc_rcar(struct net_device *ndev, int q)
-{
- struct ravb_private *priv = netdev_priv(ndev);
- unsigned int ring_size;
-
- ring_size = sizeof(struct ravb_ex_rx_desc) * (priv->num_rx_ring[q] + 1);
-
- priv->rx_ring[q].ex_desc = dma_alloc_coherent(ndev->dev.parent,
- ring_size,
- &priv->rx_desc_dma[q],
- GFP_KERNEL);
- return priv->rx_ring[q].ex_desc;
+ return priv->rx_ring[q].raw;
}
/* Init skb and descriptor buffer for Ethernet AVB */
@@ -502,7 +438,7 @@ static int ravb_ring_init(struct net_device *ndev, int q)
}
/* Allocate all RX descriptors. */
- if (!info->alloc_rx_desc(ndev, q))
+ if (!ravb_alloc_rx_desc(ndev, q))
goto error;
priv->dirty_rx[q] = 0;
@@ -2679,9 +2615,6 @@ static int ravb_mdio_release(struct ravb_private *priv)
}
static const struct ravb_hw_info ravb_gen3_hw_info = {
- .rx_ring_free = ravb_rx_ring_free_rcar,
- .rx_ring_format = ravb_rx_ring_format_rcar,
- .alloc_rx_desc = ravb_alloc_rx_desc_rcar,
.receive = ravb_rx_rcar,
.set_rate = ravb_set_rate_rcar,
.set_feature = ravb_set_features_rcar,
@@ -2695,6 +2628,7 @@ static const struct ravb_hw_info ravb_gen3_hw_info = {
.tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
.rx_max_frame_size = SZ_2K,
.rx_max_desc_use = SZ_2K - ETH_FCS_LEN + sizeof(__sum16),
+ .rx_desc_size = sizeof(struct ravb_ex_rx_desc),
.internal_delay = 1,
.tx_counters = 1,
.multi_irqs = 1,
@@ -2705,9 +2639,6 @@ static const struct ravb_hw_info ravb_gen3_hw_info = {
};
static const struct ravb_hw_info ravb_gen2_hw_info = {
- .rx_ring_free = ravb_rx_ring_free_rcar,
- .rx_ring_format = ravb_rx_ring_format_rcar,
- .alloc_rx_desc = ravb_alloc_rx_desc_rcar,
.receive = ravb_rx_rcar,
.set_rate = ravb_set_rate_rcar,
.set_feature = ravb_set_features_rcar,
@@ -2721,6 +2652,7 @@ static const struct ravb_hw_info ravb_gen2_hw_info = {
.tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
.rx_max_frame_size = SZ_2K,
.rx_max_desc_use = SZ_2K - ETH_FCS_LEN + sizeof(__sum16),
+ .rx_desc_size = sizeof(struct ravb_ex_rx_desc),
.aligned_tx = 1,
.gptp = 1,
.nc_queues = 1,
@@ -2728,9 +2660,6 @@ static const struct ravb_hw_info ravb_gen2_hw_info = {
};
static const struct ravb_hw_info ravb_rzv2m_hw_info = {
- .rx_ring_free = ravb_rx_ring_free_rcar,
- .rx_ring_format = ravb_rx_ring_format_rcar,
- .alloc_rx_desc = ravb_alloc_rx_desc_rcar,
.receive = ravb_rx_rcar,
.set_rate = ravb_set_rate_rcar,
.set_feature = ravb_set_features_rcar,
@@ -2744,6 +2673,7 @@ static const struct ravb_hw_info ravb_rzv2m_hw_info = {
.tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
.rx_max_frame_size = SZ_2K,
.rx_max_desc_use = SZ_2K - ETH_FCS_LEN + sizeof(__sum16),
+ .rx_desc_size = sizeof(struct ravb_ex_rx_desc),
.multi_irqs = 1,
.err_mgmt_irqs = 1,
.gptp = 1,
@@ -2753,9 +2683,6 @@ static const struct ravb_hw_info ravb_rzv2m_hw_info = {
};
static const struct ravb_hw_info gbeth_hw_info = {
- .rx_ring_free = ravb_rx_ring_free_gbeth,
- .rx_ring_format = ravb_rx_ring_format_gbeth,
- .alloc_rx_desc = ravb_alloc_rx_desc_gbeth,
.receive = ravb_rx_gbeth,
.set_rate = ravb_set_rate_gbeth,
.set_feature = ravb_set_features_gbeth,
@@ -2769,6 +2696,7 @@ static const struct ravb_hw_info gbeth_hw_info = {
.tccr_mask = TCCR_TSRQ0,
.rx_max_frame_size = SZ_8K,
.rx_max_desc_use = 4080,
+ .rx_desc_size = sizeof(struct ravb_rx_desc),
.aligned_tx = 1,
.tx_counters = 1,
.carrier_counters = 1,
--
2.44.0
^ permalink raw reply related [flat|nested] 8+ messages in thread* Re: [net-next,v3 0/6] ravb: Align Rx descriptor setup and maintenance
2024-03-04 11:08 [net-next,v3 0/6] ravb: Align Rx descriptor setup and maintenance Niklas Söderlund
` (5 preceding siblings ...)
2024-03-04 11:08 ` [net-next,v3 6/6] ravb: Unify Rx ring maintenance code paths Niklas Söderlund
@ 2024-03-06 11:30 ` patchwork-bot+netdevbpf
6 siblings, 0 replies; 8+ messages in thread
From: patchwork-bot+netdevbpf @ 2024-03-06 11:30 UTC (permalink / raw)
To: =?utf-8?q?Niklas_S=C3=B6derlund_=3Cniklas=2Esoderlund+renesas=40ragnatech=2E?=,
=?utf-8?q?se=3E?=
Cc: s.shtylyov, davem, edumazet, kuba, pabeni, biju.das.jz,
claudiu.beznea.uj, yoshihiro.shimoda.uh, netdev,
linux-renesas-soc
Hello:
This series was applied to netdev/net-next.git (main)
by David S. Miller <davem@davemloft.net>:
On Mon, 4 Mar 2024 12:08:52 +0100 you wrote:
> Hello,
>
> When RZ/G2L support was added the Rx code path was split in two, one to
> support R-Car and one to support RZ/G2L. One reason for this is that
> R-Car uses the extended Rx descriptor format, while RZ/G2L uses the
> normal descriptor format.
>
> [...]
Here is the summary with links:
- [net-next,v3,1/6] ravb: Group descriptor types used in Rx ring
https://git.kernel.org/netdev/net-next/c/4123c3fbf863
- [net-next,v3,2/6] ravb: Make it clear the information relates to maximum frame size
https://git.kernel.org/netdev/net-next/c/e82700b8662c
- [net-next,v3,3/6] ravb: Create helper to allocate skb and align it
https://git.kernel.org/netdev/net-next/c/cfbad64706c1
- [net-next,v3,4/6] ravb: Use the max frame size from hardware info for RZ/G2L
https://git.kernel.org/netdev/net-next/c/496863388136
- [net-next,v3,5/6] ravb: Move maximum Rx descriptor data usage to info struct
https://git.kernel.org/netdev/net-next/c/555419b2259b
- [net-next,v3,6/6] ravb: Unify Rx ring maintenance code paths
https://git.kernel.org/netdev/net-next/c/644d037b2c44
You are awesome, thank you!
--
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^ permalink raw reply [flat|nested] 8+ messages in thread