* [PATCH net-next v11 0/7] r8169: add RSS support for RTL8127
@ 2026-08-14 1:51 javen
2026-08-14 1:51 ` [PATCH net-next v11 1/7] r8169: add support for multi irqs javen
` (6 more replies)
0 siblings, 7 replies; 14+ messages in thread
From: javen @ 2026-08-14 1:51 UTC (permalink / raw)
To: hkallweit1, nic_swsd, andrew+netdev, davem, edumazet, kuba,
pabeni, horms
Cc: netdev, linux-kernel, Javen Xu
From: Javen Xu <javen_xu@realsil.com.cn>
This patch series adds RSS (Receive Side Scaling) support for the r8169
ethernet driver, specifically for RTL8127 (RTL_GIGA_MAC_VER_80).
RSS enables packet distribution across multiple receive queues, which can
significantly improve network throughput on multi-core systems by allowing
parallel processing of incoming packets.
Key features:
- Multi-queue RX support (up to 8 queues)
- MSI-X interrupt with vector mapping
- Dynamic queue configuration via ethtool (-L)
- RSS hash computation for flow classification
Experiments:
Platform: AMD Ryzen Embedded R2514 with Radeon Graphics(4 Cores/8 Threads)
Arch: x86_64
Test command:
Server: iperf3 -s
Client: iperf3 -c 192.168.2.1 -P 20 -t 3600
Monitor: mpstat -P ALL 1
Before this patch (Without RSS):
Throughput: Unstable, fluctuating between 3.76 Gbits/sec and
8.2 Gbits/sec.
CPU Usage: A single CPU core is fully occupied with softirq reaching
up to 96%.
After this patch (With RSS enabled):
Throughput: Stable at 9.42 Gbits/sec.
CPU Usage: The traffic load is evenly distributed across multiple CPU
cores. The maximum softirq on a single core dropped to 63%.
Other Experiments:
Link: https://lore.kernel.org/netdev/0A5279953D81BB9C+f50c9b49-3e5d-467f-b69a-7e49ed223383@radxa.com/
Javen Xu (7):
r8169: add support for multi irqs
r8169: refactor RX path to prepare for multi-queue
r8169: add support for new interrupt mapping
r8169: enable new interrupt mapping
r8169: add support and enable rss
r8169: move struct ethtool_ops
r8169: add get_channel support for ethtool
drivers/net/ethernet/realtek/r8169_main.c | 1076 ++++++++++++++++++---
1 file changed, 929 insertions(+), 147 deletions(-)
--
2.43.0
^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH net-next v11 1/7] r8169: add support for multi irqs
2026-08-14 1:51 [PATCH net-next v11 0/7] r8169: add RSS support for RTL8127 javen
@ 2026-08-14 1:51 ` javen
2026-08-14 1:51 ` [PATCH net-next v11 2/7] r8169: refactor RX path to prepare for multi-queue javen
` (5 subsequent siblings)
6 siblings, 0 replies; 14+ messages in thread
From: javen @ 2026-08-14 1:51 UTC (permalink / raw)
To: hkallweit1, nic_swsd, andrew+netdev, davem, edumazet, kuba,
pabeni, horms
Cc: netdev, linux-kernel, Javen Xu
From: Javen Xu <javen_xu@realsil.com.cn>
RSS uses multi rx queues to receive packets, and each rx queue needs one
irq and napi. So this patch adds support for multi irqs and napi here.
Signed-off-by: Javen Xu <javen_xu@realsil.com.cn>
---
Changes in v2:
- remove some unused definitions, such as index, name in rtl8169_irq
- remove array imr and isr
- remove min_irq_nvecs and max_irq_nvecs, replaced with help function
get_min_irq_nvecs and get_max_irq_nvecs
- alloc irq by flags, instead of PCI_IRQ_ALL_TYPES
Changes in v3:
- add enum rtl_isr_version to replace macro definition
- remove struct rtl8169_napi, use napi_struct array instead and alloc
memory for this array dynamically
- remove struct rtl8169_irq
Changes in v4:
- change retval to ret in rtl8169_set_real_num_queue()
- reverse xmas tree in rtl8169_poll() and rtl8169_interrupt()
- remove tp->hw_supp_isr_ver
Changes in v5:
- rtl8169_request_irq(), when failed, only free irqs which are
allocated
- remove rss_support, simplied napi init, call r8169_init_napi()
directly
- remove rtl_isr_version, INTR_VEC_MAP_MASK, INTR_VEC_MAP_STATUS,
R8169_MAX_MSIX_VEC, rss_enable, recheck_desc_ownbit
- rtl_software_parameter_initialize() this function will be expanded in
next patch, so i want to remain it here.
Changes in v6:
- Fix netpoll crash
- Fix use-after-free during driver unload by registering a devm action
for netif_napi_del()
- remove tp->irq
Changes in v7:
- pass NAPI as arg to rtl_rx()
- use netif_set_real_num_queues to replace rtl8169_set_real_num_queues
- replace rtl_software_parameter_initialize with rtl_setup_rx_params
Changes in v8:
- no changes
Changes in v9:
- no changes
Changes in v10:
- no changes
Changes in v11:
- no changes
---
drivers/net/ethernet/realtek/r8169_main.c | 151 +++++++++++++++++-----
1 file changed, 122 insertions(+), 29 deletions(-)
diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index ec4fc21fa21f..87eb10616a0c 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -733,7 +733,6 @@ struct rtl8169_private {
struct pci_dev *pci_dev;
struct net_device *dev;
struct phy_device *phydev;
- struct napi_struct napi;
enum mac_version mac_version;
enum rtl_dash_type dash_type;
u32 cur_rx; /* Index into the Rx descriptor buffer of next Rx pkt. */
@@ -745,10 +744,12 @@ struct rtl8169_private {
dma_addr_t RxPhyAddr;
struct page *Rx_databuff[NUM_RX_DESC]; /* Rx data buffers */
struct ring_info tx_skb[NUM_TX_DESC]; /* Tx data buffers */
+ struct napi_struct *rtl8169_napi;
+ unsigned int num_rx_rings;
u16 cp_cmd;
u16 tx_lpi_timer;
u32 irq_mask;
- int irq;
+ unsigned int irq_nvecs;
struct clk *clk;
struct {
@@ -2680,6 +2681,11 @@ static void rtl_hw_reset(struct rtl8169_private *tp)
rtl_loop_wait_low(tp, &rtl_chipcmd_cond, 100, 100);
}
+static void rtl_setup_rx_params(struct rtl8169_private *tp)
+{
+ tp->num_rx_rings = 1;
+}
+
static void rtl_request_firmware(struct rtl8169_private *tp)
{
struct rtl_fw *rtl_fw;
@@ -4266,9 +4272,21 @@ static void rtl8169_tx_clear(struct rtl8169_private *tp)
netdev_reset_queue(tp->dev);
}
+static void rtl8169_napi_disable(struct rtl8169_private *tp)
+{
+ for (int i = 0; i < tp->irq_nvecs; i++)
+ napi_disable(&tp->rtl8169_napi[i]);
+}
+
+static void rtl8169_napi_enable(struct rtl8169_private *tp)
+{
+ for (int i = 0; i < tp->irq_nvecs; i++)
+ napi_enable(&tp->rtl8169_napi[i]);
+}
+
static void rtl8169_cleanup(struct rtl8169_private *tp)
{
- napi_disable(&tp->napi);
+ rtl8169_napi_disable(tp);
/* Give a racing hard_start_xmit a few cycles to complete. */
synchronize_net();
@@ -4314,7 +4332,7 @@ static void rtl_reset_work(struct rtl8169_private *tp)
for (i = 0; i < NUM_RX_DESC; i++)
rtl8169_mark_to_asic(tp->RxDescArray + i);
- napi_enable(&tp->napi);
+ rtl8169_napi_enable(tp);
rtl_hw_start(tp);
}
@@ -4768,7 +4786,8 @@ static inline void rtl8169_rx_csum(struct sk_buff *skb, u32 opts1)
skb_checksum_none_assert(skb);
}
-static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp, int budget)
+static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp,
+ int budget, struct napi_struct *napi)
{
struct device *d = tp_to_dev(tp);
int count;
@@ -4820,7 +4839,7 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp, int budget
goto release_descriptor;
}
- skb = napi_alloc_skb(&tp->napi, pkt_size);
+ skb = napi_alloc_skb(napi, pkt_size);
if (unlikely(!skb)) {
dev->stats.rx_dropped++;
goto release_descriptor;
@@ -4844,7 +4863,7 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp, int budget
if (skb->pkt_type == PACKET_MULTICAST)
dev->stats.multicast++;
- napi_gro_receive(&tp->napi, skb);
+ napi_gro_receive(napi, skb);
dev_sw_netstats_rx_add(dev, pkt_size);
release_descriptor:
@@ -4856,8 +4875,12 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp, int budget
static irqreturn_t rtl8169_interrupt(int irq, void *dev_instance)
{
- struct rtl8169_private *tp = dev_instance;
- u32 status = rtl_get_events(tp);
+ struct napi_struct *napi = dev_instance;
+ struct rtl8169_private *tp;
+ u32 status;
+
+ tp = netdev_priv(napi->dev);
+ status = rtl_get_events(tp);
if ((status & 0xffff) == 0xffff || !(status & tp->irq_mask))
return IRQ_NONE;
@@ -4873,13 +4896,43 @@ static irqreturn_t rtl8169_interrupt(int irq, void *dev_instance)
phy_mac_interrupt(tp->phydev);
rtl_irq_disable(tp);
- napi_schedule(&tp->napi);
+ napi_schedule(napi);
out:
rtl_ack_events(tp, status);
return IRQ_HANDLED;
}
+static void rtl8169_free_irq(struct rtl8169_private *tp)
+{
+ for (int i = 0; i < tp->irq_nvecs; i++) {
+ struct napi_struct *napi = &tp->rtl8169_napi[i];
+
+ pci_free_irq(tp->pci_dev, i, napi);
+ }
+}
+
+static int rtl8169_request_irq(struct rtl8169_private *tp)
+{
+ struct net_device *dev = tp->dev;
+ struct napi_struct *napi;
+ int i, rc;
+
+ for (i = 0; i < tp->irq_nvecs; i++) {
+ napi = &tp->rtl8169_napi[i];
+ rc = pci_request_irq(tp->pci_dev, i, rtl8169_interrupt,
+ NULL, napi, "%s-%d", dev->name, i);
+ if (rc)
+ goto free_irq;
+ }
+ return 0;
+
+free_irq:
+ while (--i >= 0)
+ pci_free_irq(tp->pci_dev, i, &tp->rtl8169_napi[i]);
+ return rc;
+}
+
static void rtl_task(struct work_struct *work)
{
struct rtl8169_private *tp =
@@ -4914,13 +4967,13 @@ static void rtl_task(struct work_struct *work)
static int rtl8169_poll(struct napi_struct *napi, int budget)
{
- struct rtl8169_private *tp = container_of(napi, struct rtl8169_private, napi);
- struct net_device *dev = tp->dev;
- int work_done;
+ struct rtl8169_private *tp = netdev_priv(napi->dev);
+ struct net_device *dev = napi->dev;
+ int work_done = 0;
rtl_tx(dev, tp, budget);
- work_done = rtl_rx(dev, tp, budget);
+ work_done = rtl_rx(dev, tp, budget, napi);
if (work_done < budget && napi_complete_done(napi, work_done))
rtl_irq_enable(tp);
@@ -5035,7 +5088,7 @@ static void rtl8169_up(struct rtl8169_private *tp)
phy_init_hw(tp->phydev);
phy_resume(tp->phydev);
rtl8169_init_phy(tp);
- napi_enable(&tp->napi);
+ rtl8169_napi_enable(tp);
enable_work(&tp->wk.work);
rtl_reset_work(tp);
@@ -5053,7 +5106,7 @@ static int rtl8169_close(struct net_device *dev)
rtl8169_down(tp);
rtl8169_rx_clear(tp);
- free_irq(tp->irq, tp);
+ rtl8169_free_irq(tp);
phy_disconnect(tp->phydev);
@@ -5074,7 +5127,10 @@ static void rtl8169_netpoll(struct net_device *dev)
{
struct rtl8169_private *tp = netdev_priv(dev);
- rtl8169_interrupt(tp->irq, tp);
+ for (int i = 0; i < tp->irq_nvecs; i++) {
+ rtl8169_interrupt(pci_irq_vector(tp->pci_dev, i),
+ &tp->rtl8169_napi[i]);
+ }
}
#endif
@@ -5082,7 +5138,6 @@ static int rtl_open(struct net_device *dev)
{
struct rtl8169_private *tp = netdev_priv(dev);
struct pci_dev *pdev = tp->pci_dev;
- unsigned long irqflags;
int retval = -ENOMEM;
pm_runtime_get_sync(&pdev->dev);
@@ -5107,8 +5162,7 @@ static int rtl_open(struct net_device *dev)
rtl_request_firmware(tp);
- irqflags = pci_dev_msi_enabled(pdev) ? IRQF_NO_THREAD : IRQF_SHARED;
- retval = request_irq(tp->irq, rtl8169_interrupt, irqflags, dev->name, tp);
+ retval = rtl8169_request_irq(tp);
if (retval < 0)
goto err_release_fw_2;
@@ -5125,7 +5179,7 @@ static int rtl_open(struct net_device *dev)
return retval;
err_free_irq:
- free_irq(tp->irq, tp);
+ rtl8169_free_irq(tp);
err_release_fw_2:
rtl_release_firmware(tp);
rtl8169_rx_clear(tp);
@@ -5275,6 +5329,14 @@ static void rtl_shutdown(struct pci_dev *pdev)
pci_prepare_to_sleep(pdev);
}
+static void r8169_free_napi(struct rtl8169_private *tp)
+{
+ for (int i = 0; i < tp->irq_nvecs; i++)
+ netif_napi_del(&tp->rtl8169_napi[i]);
+
+ kfree(tp->rtl8169_napi);
+}
+
static void rtl_remove_one(struct pci_dev *pdev)
{
struct rtl8169_private *tp = pci_get_drvdata(pdev);
@@ -5289,6 +5351,8 @@ static void rtl_remove_one(struct pci_dev *pdev)
unregister_netdev(tp->dev);
+ r8169_free_napi(tp);
+
if (tp->dash_type != RTL_DASH_NONE)
rtl8168_driver_stop(tp);
@@ -5328,7 +5392,9 @@ static void rtl_set_irq_mask(struct rtl8169_private *tp)
static int rtl_alloc_irq(struct rtl8169_private *tp)
{
+ struct pci_dev *pdev = tp->pci_dev;
unsigned int flags;
+ int nvecs;
switch (tp->mac_version) {
case RTL_GIGA_MAC_VER_02 ... RTL_GIGA_MAC_VER_06:
@@ -5344,7 +5410,14 @@ static int rtl_alloc_irq(struct rtl8169_private *tp)
break;
}
- return pci_alloc_irq_vectors(tp->pci_dev, 1, 1, flags);
+ nvecs = pci_alloc_irq_vectors(pdev, 1, 1, flags);
+
+ if (nvecs < 0)
+ return nvecs;
+
+ tp->irq_nvecs = nvecs;
+
+ return 0;
}
static void rtl_read_mac_address(struct rtl8169_private *tp,
@@ -5599,6 +5672,12 @@ static bool rtl_aspm_is_safe(struct rtl8169_private *tp)
return false;
}
+static void r8169_init_napi(struct rtl8169_private *tp)
+{
+ for (int i = 0; i < tp->irq_nvecs; i++)
+ netif_napi_add(tp->dev, &tp->rtl8169_napi[i], rtl8169_poll);
+}
+
static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
{
const struct rtl_chip_info *chip;
@@ -5703,12 +5782,12 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
rtl_hw_reset(tp);
+ rtl_setup_rx_params(tp);
+
rc = rtl_alloc_irq(tp);
if (rc < 0)
return dev_err_probe(&pdev->dev, rc, "Can't allocate interrupt\n");
- tp->irq = pci_irq_vector(pdev, 0);
-
INIT_WORK(&tp->wk.work, rtl_task);
disable_work(&tp->wk.work);
@@ -5716,8 +5795,6 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
dev->ethtool_ops = &rtl8169_ethtool_ops;
- netif_napi_add(dev, &tp->napi, rtl8169_poll);
-
dev->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM |
NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
dev->vlan_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO;
@@ -5778,6 +5855,10 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
if (jumbo_max)
dev->max_mtu = jumbo_max;
+ rc = netif_set_real_num_queues(tp->dev, 1, tp->num_rx_rings);
+ if (rc < 0)
+ return dev_err_probe(&pdev->dev, rc, "set tx/rx num failure\n");
+
rtl_set_irq_mask(tp);
tp->counters = dmam_alloc_coherent (&pdev->dev, sizeof(*tp->counters),
@@ -5792,9 +5873,16 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
if (rc)
return rc;
+ tp->rtl8169_napi = kcalloc(tp->irq_nvecs, sizeof(struct napi_struct),
+ GFP_KERNEL);
+ if (!tp->rtl8169_napi)
+ return -ENOMEM;
+
+ r8169_init_napi(tp);
+
rc = register_netdev(dev);
if (rc)
- return rc;
+ goto err_free_napi;
if (IS_ENABLED(CONFIG_R8169_LEDS)) {
if (rtl_is_8125(tp))
@@ -5803,8 +5891,9 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
tp->leds = rtl8168_init_leds(dev);
}
- netdev_info(dev, "%s, %pM, %sXID %x, IRQ %d\n",
- chip->name, dev->dev_addr, ext_xid_str, xid, tp->irq);
+ netdev_info(dev, "%s, %pM, %sXID %x, IRQ %d (%d total)\n",
+ chip->name, dev->dev_addr, ext_xid_str, xid,
+ pci_irq_vector(pdev, 0), tp->irq_nvecs);
if (jumbo_max)
netdev_info(dev, "jumbo features [frames: %d bytes, tx checksumming: %s]\n",
@@ -5821,6 +5910,10 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
pm_runtime_put_sync(&pdev->dev);
return 0;
+
+err_free_napi:
+ r8169_free_napi(tp);
+ return rc;
}
static struct pci_driver rtl8169_pci_driver = {
--
2.43.0
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH net-next v11 2/7] r8169: refactor RX path to prepare for multi-queue
2026-08-14 1:51 [PATCH net-next v11 0/7] r8169: add RSS support for RTL8127 javen
2026-08-14 1:51 ` [PATCH net-next v11 1/7] r8169: add support for multi irqs javen
@ 2026-08-14 1:51 ` javen
2026-08-14 1:51 ` [PATCH net-next v11 3/7] r8169: add support for new interrupt mapping javen
` (4 subsequent siblings)
6 siblings, 0 replies; 14+ messages in thread
From: javen @ 2026-08-14 1:51 UTC (permalink / raw)
To: hkallweit1, nic_swsd, andrew+netdev, davem, edumazet, kuba,
pabeni, horms
Cc: netdev, linux-kernel, Javen Xu
From: Javen Xu <javen_xu@realsil.com.cn>
This patch is a preparatory refactoring of the RX path. It introduces
struct rtl8169_rx_ring and turns the previously embedded RX state in
rtl8169_private into a per-queue array.
While the netdev allocation is changed to devm_alloc_etherdev_mqs()
with up to 8 RX queues, the actual number of active RX rings
(num_rx_rings) is currently kept at 1. The actual multi-queue operation
and RSS enablement will be introduced in subsequent patches.
Signed-off-by: Javen Xu <javen_xu@realsil.com.cn>
---
Changes in v2:
- sort some registers by its number
- remove some unused definitions, like RX_DESC_RING_TYPE_MAX
- change recheck_desc_ownbit type
- remove rdsar_reg in rx_ring struct
- opts1 are different in rx_desc and rx_desc_rss, move the judgement
to Patch 5/7
Changes in v3:
- remove ring->rx_desc_alloc_size, use constant instead
Changes in v4:
- change rdsar_reg type to unsigned int
- follow reverse xmas tree, in rtl_set_rx_tx_desc_registers(),
rtl8169_alloc_rx_data(), rtl8169_alloc_rx_desc(),
rtl8169_free_rx_desc()
- add comments on LED_CTRL, remove helper function
Changes in v5:
- modify rtl8169_init_ring(), do rx clear when failed
- add definition R8169_MAX_TX_QUEUES 1
Changes in v6:
- Restore the secondary Rx error filter when NETIF_F_RXFALL is enabled
in rtl_rx()
Changes in v7:
- remove code associated with recheck_desc_ownbit
Changes in v8:
- remove le64_to_cpu() for addr, rx get addr from rx_desc_phy_addr
Changes in v9:
- remove R8127_MAX_RX_QUEUES
- remvoe rx_desc_ring_type to the following patch
- Fix loop bound in init_ring_indexes
- Restore checksum API
Changes in v10:
- alloc rtl8169_rx_ring struct according to the num_rx_ring dynamically
Changes in v11:
- leak rx_ring array on driver removal
---
drivers/net/ethernet/realtek/r8169_main.c | 245 +++++++++++++++++-----
1 file changed, 190 insertions(+), 55 deletions(-)
diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 87eb10616a0c..9311a0cab4eb 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -74,9 +74,19 @@
#define NUM_TX_DESC 256 /* Number of Tx descriptor registers */
#define NUM_RX_DESC 256 /* Number of Rx descriptor registers */
#define R8169_TX_RING_BYTES (NUM_TX_DESC * sizeof(struct TxDesc))
-#define R8169_RX_RING_BYTES (NUM_RX_DESC * sizeof(struct RxDesc))
+
+/*
+ * Workaround for the hardware DMA prefetcher. The H/W might aggressively
+ * fetch one more descriptor even after hitting the RingEnd mark. We
+ * allocate this extra dummy space as padding to prevent out-of-bounds
+ * access and potential IOMMU faults.
+ */
+#define R8169_RX_RING_BYTES ((NUM_RX_DESC + 1) * sizeof(struct RxDesc))
#define R8169_TX_STOP_THRS (MAX_SKB_FRAGS + 1)
#define R8169_TX_START_THRS (2 * R8169_TX_STOP_THRS)
+#define R8169_MAX_RX_QUEUES 8
+#define R8169_DEFAULT_RX_QUEUES 1
+#define R8169_MAX_TX_QUEUES 1
#define OCP_STD_PHY_BASE 0xa400
@@ -441,6 +451,7 @@ enum rtl8125_registers {
TxPoll_8125 = 0x90,
LEDSEL3 = 0x96,
MAC0_BKP = 0x19e0,
+ RDSAR_Q1_LOW = 0x4000,
RSS_CTRL_8125 = 0x4500,
Q_NUM_CTRL_8125 = 0x4800,
EEE_TXIDLE_TIMER_8125 = 0x6048,
@@ -728,6 +739,15 @@ enum rtl_dash_type {
RTL_DASH_25_BP,
};
+struct rtl8169_rx_ring {
+ u32 cur_rx;
+ u32 dirty_rx;
+ struct RxDesc *rx_desc_array;
+ dma_addr_t rx_desc_phy_addr[NUM_RX_DESC];
+ dma_addr_t rx_phy_addr;
+ struct page *rx_databuff[NUM_RX_DESC];
+};
+
struct rtl8169_private {
void __iomem *mmio_addr; /* memory map physical address */
struct pci_dev *pci_dev;
@@ -735,20 +755,18 @@ struct rtl8169_private {
struct phy_device *phydev;
enum mac_version mac_version;
enum rtl_dash_type dash_type;
- u32 cur_rx; /* Index into the Rx descriptor buffer of next Rx pkt. */
u32 cur_tx; /* Index into the Tx descriptor buffer of next Rx pkt. */
u32 dirty_tx;
struct TxDesc *TxDescArray; /* 256-aligned Tx descriptor ring */
- struct RxDesc *RxDescArray; /* 256-aligned Rx descriptor ring */
dma_addr_t TxPhyAddr;
- dma_addr_t RxPhyAddr;
- struct page *Rx_databuff[NUM_RX_DESC]; /* Rx data buffers */
struct ring_info tx_skb[NUM_TX_DESC]; /* Tx data buffers */
struct napi_struct *rtl8169_napi;
+ struct rtl8169_rx_ring *rx_ring;
unsigned int num_rx_rings;
u16 cp_cmd;
u16 tx_lpi_timer;
u32 irq_mask;
+ unsigned int hw_supp_num_rx_queues;
unsigned int irq_nvecs;
struct clk *clk;
@@ -2620,9 +2638,26 @@ static void rtl_init_rxcfg(struct rtl8169_private *tp)
}
}
+static void rtl8169_rx_desc_init(struct rtl8169_private *tp)
+{
+ for (int i = 0; i < tp->num_rx_rings; i++) {
+ struct rtl8169_rx_ring *ring = &tp->rx_ring[i];
+
+ memset(ring->rx_desc_array, 0x0, R8169_RX_RING_BYTES);
+ }
+}
+
static void rtl8169_init_ring_indexes(struct rtl8169_private *tp)
{
- tp->dirty_tx = tp->cur_tx = tp->cur_rx = 0;
+ tp->dirty_tx = 0;
+ tp->cur_tx = 0;
+
+ for (int i = 0; i < tp->num_rx_rings; i++) {
+ struct rtl8169_rx_ring *ring = &tp->rx_ring[i];
+
+ ring->dirty_rx = 0;
+ ring->cur_rx = 0;
+ }
}
static void rtl_jumbo_config(struct rtl8169_private *tp)
@@ -2684,6 +2719,14 @@ static void rtl_hw_reset(struct rtl8169_private *tp)
static void rtl_setup_rx_params(struct rtl8169_private *tp)
{
tp->num_rx_rings = 1;
+ switch (tp->mac_version) {
+ case RTL_GIGA_MAC_VER_80:
+ tp->hw_supp_num_rx_queues = R8169_MAX_RX_QUEUES;
+ break;
+ default:
+ tp->hw_supp_num_rx_queues = R8169_DEFAULT_RX_QUEUES;
+ break;
+ }
}
static void rtl_request_firmware(struct rtl8169_private *tp)
@@ -2810,6 +2853,8 @@ static void rtl_set_rx_max_size(struct rtl8169_private *tp)
static void rtl_set_rx_tx_desc_registers(struct rtl8169_private *tp)
{
+ struct rtl8169_rx_ring *ring = &tp->rx_ring[0];
+
/*
* Magic spell: some iop3xx ARM board needs the TxDescAddrHigh
* register to be written before TxDescAddrLow to work.
@@ -2817,8 +2862,18 @@ static void rtl_set_rx_tx_desc_registers(struct rtl8169_private *tp)
*/
RTL_W32(tp, TxDescStartAddrHigh, ((u64) tp->TxPhyAddr) >> 32);
RTL_W32(tp, TxDescStartAddrLow, ((u64) tp->TxPhyAddr) & DMA_BIT_MASK(32));
- RTL_W32(tp, RxDescAddrHigh, ((u64) tp->RxPhyAddr) >> 32);
- RTL_W32(tp, RxDescAddrLow, ((u64) tp->RxPhyAddr) & DMA_BIT_MASK(32));
+ RTL_W32(tp, RxDescAddrHigh, ((u64)ring->rx_phy_addr) >> 32);
+ RTL_W32(tp, RxDescAddrLow,
+ ((u64)ring->rx_phy_addr) & DMA_BIT_MASK(32));
+
+ for (int i = 1; i < tp->num_rx_rings; i++) {
+ unsigned int rdsar_reg = RDSAR_Q1_LOW + (i - 1) * 8;
+ struct rtl8169_rx_ring *ring = &tp->rx_ring[i];
+
+ RTL_W32(tp, rdsar_reg + 4, ((u64)ring->rx_phy_addr >> 32));
+ RTL_W32(tp, rdsar_reg,
+ ((u64)ring->rx_phy_addr) & DMA_BIT_MASK(32));
+ }
}
static void rtl8169_set_magic_reg(struct rtl8169_private *tp)
@@ -4165,8 +4220,9 @@ static void rtl8169_mark_to_asic(struct RxDesc *desc)
}
static struct page *rtl8169_alloc_rx_data(struct rtl8169_private *tp,
- struct RxDesc *desc)
+ struct rtl8169_rx_ring *ring, unsigned int index)
{
+ struct RxDesc *desc = ring->rx_desc_array + index;
struct device *d = tp_to_dev(tp);
int node = dev_to_node(d);
dma_addr_t mapping;
@@ -4184,55 +4240,107 @@ static struct page *rtl8169_alloc_rx_data(struct rtl8169_private *tp,
}
desc->addr = cpu_to_le64(mapping);
+ ring->rx_desc_phy_addr[index] = mapping;
rtl8169_mark_to_asic(desc);
return data;
}
-static void rtl8169_rx_clear(struct rtl8169_private *tp)
+static void rtl8169_rx_clear(struct rtl8169_private *tp,
+ struct rtl8169_rx_ring *ring)
{
int i;
- for (i = 0; i < NUM_RX_DESC && tp->Rx_databuff[i]; i++) {
+ for (i = 0; i < NUM_RX_DESC && ring->rx_databuff[i]; i++) {
dma_unmap_page(tp_to_dev(tp),
- le64_to_cpu(tp->RxDescArray[i].addr),
+ ring->rx_desc_phy_addr[i],
R8169_RX_BUF_SIZE, DMA_FROM_DEVICE);
- __free_pages(tp->Rx_databuff[i], get_order(R8169_RX_BUF_SIZE));
- tp->Rx_databuff[i] = NULL;
- tp->RxDescArray[i].addr = 0;
- tp->RxDescArray[i].opts1 = 0;
+ __free_pages(ring->rx_databuff[i], get_order(R8169_RX_BUF_SIZE));
+ ring->rx_databuff[i] = NULL;
+ ring->rx_desc_phy_addr[i] = 0;
+ ring->rx_desc_array[i].addr = 0;
+ ring->rx_desc_array[i].opts1 = 0;
}
}
-static int rtl8169_rx_fill(struct rtl8169_private *tp)
+static int rtl8169_rx_fill(struct rtl8169_private *tp, struct rtl8169_rx_ring *ring)
{
int i;
for (i = 0; i < NUM_RX_DESC; i++) {
struct page *data;
- data = rtl8169_alloc_rx_data(tp, tp->RxDescArray + i);
+ data = rtl8169_alloc_rx_data(tp, ring, i);
if (!data) {
- rtl8169_rx_clear(tp);
+ rtl8169_rx_clear(tp, ring);
return -ENOMEM;
}
- tp->Rx_databuff[i] = data;
+ ring->rx_databuff[i] = data;
}
/* mark as last descriptor in the ring */
- tp->RxDescArray[NUM_RX_DESC - 1].opts1 |= cpu_to_le32(RingEnd);
+ ring->rx_desc_array[NUM_RX_DESC - 1].opts1 |= cpu_to_le32(RingEnd);
return 0;
}
+static int rtl8169_alloc_rx_desc(struct rtl8169_private *tp)
+{
+ struct pci_dev *pdev = tp->pci_dev;
+ struct rtl8169_rx_ring *ring;
+
+ for (int i = 0; i < tp->num_rx_rings; i++) {
+ ring = &tp->rx_ring[i];
+ ring->rx_desc_array = dma_alloc_coherent(&pdev->dev,
+ R8169_RX_RING_BYTES,
+ &ring->rx_phy_addr,
+ GFP_KERNEL);
+ if (!ring->rx_desc_array)
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+static void rtl8169_free_rx_desc(struct rtl8169_private *tp)
+{
+ struct pci_dev *pdev = tp->pci_dev;
+ struct rtl8169_rx_ring *ring;
+
+ for (int i = 0; i < tp->num_rx_rings; i++) {
+ ring = &tp->rx_ring[i];
+ if (ring->rx_desc_array) {
+ dma_free_coherent(&pdev->dev,
+ R8169_RX_RING_BYTES,
+ ring->rx_desc_array,
+ ring->rx_phy_addr);
+ ring->rx_desc_array = NULL;
+ }
+ }
+}
+
static int rtl8169_init_ring(struct rtl8169_private *tp)
{
+ int i, ret;
+
rtl8169_init_ring_indexes(tp);
+ rtl8169_rx_desc_init(tp);
memset(tp->tx_skb, 0, sizeof(tp->tx_skb));
- memset(tp->Rx_databuff, 0, sizeof(tp->Rx_databuff));
- return rtl8169_rx_fill(tp);
+ for (i = 0; i < tp->num_rx_rings; i++) {
+ struct rtl8169_rx_ring *ring = &tp->rx_ring[i];
+
+ memset(ring->rx_databuff, 0, sizeof(ring->rx_databuff));
+ ret = rtl8169_rx_fill(tp, ring);
+ if (ret < 0)
+ goto err_clear;
+ }
+ return 0;
+
+err_clear:
+ while (--i >= 0)
+ rtl8169_rx_clear(tp, &tp->rx_ring[i]);
+ return ret;
}
static void rtl8169_unmap_tx_skb(struct rtl8169_private *tp, unsigned int entry)
@@ -4321,16 +4429,23 @@ static void rtl8169_cleanup(struct rtl8169_private *tp)
rtl8169_init_ring_indexes(tp);
}
-static void rtl_reset_work(struct rtl8169_private *tp)
+static void rtl8169_rx_desc_reset(struct rtl8169_private *tp)
{
- int i;
+ for (int i = 0; i < tp->num_rx_rings; i++) {
+ struct rtl8169_rx_ring *ring = &tp->rx_ring[i];
+ for (int j = 0; j < NUM_RX_DESC; j++)
+ rtl8169_mark_to_asic(ring->rx_desc_array + j);
+ }
+}
+
+static void rtl_reset_work(struct rtl8169_private *tp)
+{
netif_stop_queue(tp->dev);
rtl8169_cleanup(tp);
- for (i = 0; i < NUM_RX_DESC; i++)
- rtl8169_mark_to_asic(tp->RxDescArray + i);
+ rtl8169_rx_desc_reset(tp);
rtl8169_napi_enable(tp);
rtl_hw_start(tp);
@@ -4776,7 +4891,8 @@ static inline int rtl8169_fragmented_frame(u32 status)
return (status & (FirstFrag | LastFrag)) != (FirstFrag | LastFrag);
}
-static inline void rtl8169_rx_csum(struct sk_buff *skb, u32 opts1)
+static inline void rtl8169_rx_csum(struct sk_buff *skb,
+ u32 opts1)
{
u32 status = opts1 & (RxProtoMask | RxCSFailMask);
@@ -4786,15 +4902,30 @@ static inline void rtl8169_rx_csum(struct sk_buff *skb, u32 opts1)
skb_checksum_none_assert(skb);
}
+static bool rtl8169_check_rx_desc_error(struct net_device *dev,
+ struct rtl8169_private *tp,
+ u32 status)
+{
+ if (unlikely(status & RxRES)) {
+ if (status & (RxRWT | RxRUNT))
+ dev->stats.rx_length_errors++;
+ if (status & RxCRC)
+ dev->stats.rx_crc_errors++;
+ return true;
+ }
+ return false;
+}
+
static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp,
- int budget, struct napi_struct *napi)
+ struct rtl8169_rx_ring *ring, int budget,
+ struct napi_struct *napi)
{
struct device *d = tp_to_dev(tp);
int count;
- for (count = 0; count < budget; count++, tp->cur_rx++) {
- unsigned int pkt_size, entry = tp->cur_rx % NUM_RX_DESC;
- struct RxDesc *desc = tp->RxDescArray + entry;
+ for (count = 0; count < budget; count++, ring->cur_rx++) {
+ unsigned int pkt_size, entry = ring->cur_rx % NUM_RX_DESC;
+ struct RxDesc *desc = ring->rx_desc_array + entry;
struct sk_buff *skb;
const void *rx_buf;
dma_addr_t addr;
@@ -4810,15 +4941,11 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp,
*/
dma_rmb();
- if (unlikely(status & RxRES)) {
+ if (rtl8169_check_rx_desc_error(dev, tp, status)) {
if (net_ratelimit())
netdev_warn(dev, "Rx ERROR. status = %08x\n",
status);
dev->stats.rx_errors++;
- if (status & (RxRWT | RxRUNT))
- dev->stats.rx_length_errors++;
- if (status & RxCRC)
- dev->stats.rx_crc_errors++;
if (!(dev->features & NETIF_F_RXALL))
goto release_descriptor;
@@ -4845,8 +4972,8 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp,
goto release_descriptor;
}
- addr = le64_to_cpu(desc->addr);
- rx_buf = page_address(tp->Rx_databuff[entry]);
+ addr = ring->rx_desc_phy_addr[entry];
+ rx_buf = page_address(ring->rx_databuff[entry]);
dma_sync_single_for_cpu(d, addr, pkt_size, DMA_FROM_DEVICE);
prefetch(rx_buf);
@@ -4973,7 +5100,8 @@ static int rtl8169_poll(struct napi_struct *napi, int budget)
rtl_tx(dev, tp, budget);
- work_done = rtl_rx(dev, tp, budget, napi);
+ /* rtl8169_poll() is used only when there is a single RX ring. */
+ work_done = rtl_rx(dev, tp, &tp->rx_ring[0], budget, napi);
if (work_done < budget && napi_complete_done(napi, work_done))
rtl_irq_enable(tp);
@@ -5104,18 +5232,17 @@ static int rtl8169_close(struct net_device *dev)
netif_stop_queue(dev);
rtl8169_down(tp);
- rtl8169_rx_clear(tp);
+ for (int i = 0; i < tp->num_rx_rings; i++)
+ rtl8169_rx_clear(tp, &tp->rx_ring[i]);
rtl8169_free_irq(tp);
phy_disconnect(tp->phydev);
- dma_free_coherent(&pdev->dev, R8169_RX_RING_BYTES, tp->RxDescArray,
- tp->RxPhyAddr);
dma_free_coherent(&pdev->dev, R8169_TX_RING_BYTES, tp->TxDescArray,
tp->TxPhyAddr);
tp->TxDescArray = NULL;
- tp->RxDescArray = NULL;
+ rtl8169_free_rx_desc(tp);
pm_runtime_put_sync(&pdev->dev);
@@ -5151,10 +5278,8 @@ static int rtl_open(struct net_device *dev)
if (!tp->TxDescArray)
goto out;
- tp->RxDescArray = dma_alloc_coherent(&pdev->dev, R8169_RX_RING_BYTES,
- &tp->RxPhyAddr, GFP_KERNEL);
- if (!tp->RxDescArray)
- goto err_free_tx_0;
+ if (rtl8169_alloc_rx_desc(tp) < 0)
+ goto err_free_rx_1;
retval = rtl8169_init_ring(tp);
if (retval < 0)
@@ -5182,12 +5307,10 @@ static int rtl_open(struct net_device *dev)
rtl8169_free_irq(tp);
err_release_fw_2:
rtl_release_firmware(tp);
- rtl8169_rx_clear(tp);
+ for (int i = 0; i < tp->num_rx_rings; i++)
+ rtl8169_rx_clear(tp, &tp->rx_ring[i]);
err_free_rx_1:
- dma_free_coherent(&pdev->dev, R8169_RX_RING_BYTES, tp->RxDescArray,
- tp->RxPhyAddr);
- tp->RxDescArray = NULL;
-err_free_tx_0:
+ rtl8169_free_rx_desc(tp);
dma_free_coherent(&pdev->dev, R8169_TX_RING_BYTES, tp->TxDescArray,
tp->TxPhyAddr);
tp->TxDescArray = NULL;
@@ -5352,6 +5475,7 @@ static void rtl_remove_one(struct pci_dev *pdev)
unregister_netdev(tp->dev);
r8169_free_napi(tp);
+ kfree(tp->rx_ring);
if (tp->dash_type != RTL_DASH_NONE)
rtl8168_driver_stop(tp);
@@ -5688,7 +5812,10 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
u32 txconfig;
u32 xid;
- dev = devm_alloc_etherdev(&pdev->dev, sizeof (*tp));
+ dev = devm_alloc_etherdev_mqs(&pdev->dev, sizeof(*tp),
+ R8169_MAX_TX_QUEUES,
+ R8169_MAX_RX_QUEUES);
+
if (!dev)
return -ENOMEM;
@@ -5873,10 +6000,17 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
if (rc)
return rc;
+ tp->rx_ring = kcalloc(tp->num_rx_rings, sizeof(struct rtl8169_rx_ring),
+ GFP_KERNEL);
+ if (!tp->rx_ring)
+ return -ENOMEM;
+
tp->rtl8169_napi = kcalloc(tp->irq_nvecs, sizeof(struct napi_struct),
GFP_KERNEL);
- if (!tp->rtl8169_napi)
+ if (!tp->rtl8169_napi) {
+ kfree(tp->rx_ring);
return -ENOMEM;
+ }
r8169_init_napi(tp);
@@ -5913,6 +6047,7 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
err_free_napi:
r8169_free_napi(tp);
+ kfree(tp->rx_ring);
return rc;
}
--
2.43.0
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH net-next v11 3/7] r8169: add support for new interrupt mapping
2026-08-14 1:51 [PATCH net-next v11 0/7] r8169: add RSS support for RTL8127 javen
2026-08-14 1:51 ` [PATCH net-next v11 1/7] r8169: add support for multi irqs javen
2026-08-14 1:51 ` [PATCH net-next v11 2/7] r8169: refactor RX path to prepare for multi-queue javen
@ 2026-08-14 1:51 ` javen
2026-08-14 22:45 ` Mohsin Bashir
2026-08-14 1:52 ` [PATCH net-next v11 4/7] r8169: enable " javen
` (3 subsequent siblings)
6 siblings, 1 reply; 14+ messages in thread
From: javen @ 2026-08-14 1:51 UTC (permalink / raw)
To: hkallweit1, nic_swsd, andrew+netdev, davem, edumazet, kuba,
pabeni, horms
Cc: netdev, linux-kernel, Javen Xu
From: Javen Xu <javen_xu@realsil.com.cn>
To support RSS, the number of hardware interrupt bits should match the
interrupt of software. So we add support for new interrupt mapping here.
ISR_VEC_MAP_REG is the hardware register to indicate interrupt status.
IMR_SET_VEC_MAP_REG is interrupt mask which is set to enable irq.
Signed-off-by: Javen Xu <javen_xu@realsil.com.cn>
---
Changes in v2:
- no changes
Changes in v3:
- init index in napi_struct and get message_id from index
- move rtl8169_disable_hw_interrupt_msix directly before the call to
napi_schedule()
- change the condition in rtl8169_request_irq when RTL_VEC_MAP_ENABLE
enabled, use rtl8169_interrupt_msix
Changes in v4:
- remove flag tp->feature, replace tp->features & RTL_VEC_MAP_ENABLE
with tp->irq_nvecs > 1, they are equivalent.
- follow reverse xmas tree, in rtl8169_interrupt_msix(),
rtl8169_poll_msix_rx(), rtl8169_poll_msix_tx(),
rtl8169_poll_msix_other()
- use napi->index in rtl8169_poll_msix_other()
- add a comment to describe RTL8127 MSI-X vector layout
- simplify r8169_init_napi()
Changes in v5:
- replace magic number in rtl8169_poll_msix_tx()
Changes in v6:
- when irq_nvecs <= 1, use register IntrMask_8125, else using vec map
- fix irq sequence in rtl8169_interrupt_msix(), disable interrupts
before clean it
- remove dead code in rtl8169_poll_msix_tx()
Changes in v7:
- remove recheck_desc_ownbit
- change return value of rtl_tx
- remove message_id which only used once
Changes in v8:
- fix rtl8169_netpoll()
- remove tx_done
Changes in v9:
- change the way of getting message_id of napi
Changes in v10:
- no changes
Changes in v11:
- add comment on rtl8169_poll_msix_tx, only use 1 tx
- remove napi for other. Separate napi only for datapath, control path
like linkchg is handled in interrupt function, which will not call
napi any more.
---
drivers/net/ethernet/realtek/r8169_main.c | 213 +++++++++++++++++++---
1 file changed, 187 insertions(+), 26 deletions(-)
diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 9311a0cab4eb..b30f0a31d7c7 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -84,6 +84,7 @@
#define R8169_RX_RING_BYTES ((NUM_RX_DESC + 1) * sizeof(struct RxDesc))
#define R8169_TX_STOP_THRS (MAX_SKB_FRAGS + 1)
#define R8169_TX_START_THRS (2 * R8169_TX_STOP_THRS)
+#define R8169_MAX_QUEUES 16
#define R8169_MAX_RX_QUEUES 8
#define R8169_DEFAULT_RX_QUEUES 1
#define R8169_MAX_TX_QUEUES 1
@@ -455,8 +456,12 @@ enum rtl8125_registers {
RSS_CTRL_8125 = 0x4500,
Q_NUM_CTRL_8125 = 0x4800,
EEE_TXIDLE_TIMER_8125 = 0x6048,
+ IMR_CLEAR_VEC_MAP_REG = 0x0d00,
+ ISR_VEC_MAP_REG = 0x0d04,
+ IMR_SET_VEC_MAP_REG = 0x0d0c,
};
+#define MSIX_ID_VEC_MAP_LINKCHG 29
#define LEDSEL_MASK_8125 0x23f
#define RX_VLAN_INNER_8125 BIT(22)
@@ -587,6 +592,9 @@ enum rtl_register_content {
/* magic enable v2 */
MagicPacket_v2 = (1 << 16), /* Wake up when receives a Magic Packet */
+#define ISRIMR_LINKCHG BIT(29)
+#define ISRIMR_TOK_Q0 BIT(8)
+#define ISRIMR_ROK_Q0 BIT(0)
};
enum rtl_desc_bit {
@@ -1663,26 +1671,38 @@ static u32 rtl_get_events(struct rtl8169_private *tp)
static void rtl_ack_events(struct rtl8169_private *tp, u32 bits)
{
- if (rtl_is_8125(tp))
- RTL_W32(tp, IntrStatus_8125, bits);
- else
+ if (rtl_is_8125(tp)) {
+ if (tp->irq_nvecs > 1)
+ RTL_W32(tp, ISR_VEC_MAP_REG, bits);
+ else
+ RTL_W32(tp, IntrStatus_8125, bits);
+ } else {
RTL_W16(tp, IntrStatus, bits);
+ }
}
static void rtl_irq_disable(struct rtl8169_private *tp)
{
- if (rtl_is_8125(tp))
- RTL_W32(tp, IntrMask_8125, 0);
- else
+ if (rtl_is_8125(tp)) {
+ if (tp->irq_nvecs > 1)
+ RTL_W32(tp, IMR_CLEAR_VEC_MAP_REG, 0xffffffff);
+ else
+ RTL_W32(tp, IntrMask_8125, 0);
+ } else {
RTL_W16(tp, IntrMask, 0);
+ }
}
static void rtl_irq_enable(struct rtl8169_private *tp)
{
- if (rtl_is_8125(tp))
- RTL_W32(tp, IntrMask_8125, tp->irq_mask);
- else
+ if (rtl_is_8125(tp)) {
+ if (tp->irq_nvecs > 1)
+ RTL_W32(tp, IMR_SET_VEC_MAP_REG, tp->irq_mask);
+ else
+ RTL_W32(tp, IntrMask_8125, tp->irq_mask);
+ } else {
RTL_W16(tp, IntrMask, tp->irq_mask);
+ }
}
static void rtl8169_irq_mask_and_ack(struct rtl8169_private *tp)
@@ -4382,13 +4402,17 @@ static void rtl8169_tx_clear(struct rtl8169_private *tp)
static void rtl8169_napi_disable(struct rtl8169_private *tp)
{
- for (int i = 0; i < tp->irq_nvecs; i++)
+ int napi_num = min(tp->irq_nvecs, R8169_MAX_QUEUES);
+
+ for (int i = 0; i < napi_num; i++)
napi_disable(&tp->rtl8169_napi[i]);
}
static void rtl8169_napi_enable(struct rtl8169_private *tp)
{
- for (int i = 0; i < tp->irq_nvecs; i++)
+ int napi_num = min(tp->irq_nvecs, R8169_MAX_QUEUES);
+
+ for (int i = 0; i < napi_num; i++)
napi_enable(&tp->rtl8169_napi[i]);
}
@@ -5030,13 +5054,66 @@ static irqreturn_t rtl8169_interrupt(int irq, void *dev_instance)
return IRQ_HANDLED;
}
+static void rtl8169_free_one_irq(struct rtl8169_private *tp, int i)
+{
+ if (tp->irq_nvecs > 1) {
+ if (i < R8169_MAX_QUEUES)
+ pci_free_irq(tp->pci_dev, i, &tp->rtl8169_napi[i]);
+ else if (i == MSIX_ID_VEC_MAP_LINKCHG)
+ pci_free_irq(tp->pci_dev, i, tp);
+ } else {
+ pci_free_irq(tp->pci_dev, i, &tp->rtl8169_napi[i]);
+ }
+}
+
static void rtl8169_free_irq(struct rtl8169_private *tp)
{
- for (int i = 0; i < tp->irq_nvecs; i++) {
- struct napi_struct *napi = &tp->rtl8169_napi[i];
+ for (int i = 0; i < tp->irq_nvecs; i++)
+ rtl8169_free_one_irq(tp, i);
+}
- pci_free_irq(tp->pci_dev, i, napi);
- }
+static void rtl8169_disable_hw_interrupt_msix(struct rtl8169_private *tp,
+ int message_id)
+{
+ RTL_W32(tp, IMR_CLEAR_VEC_MAP_REG, BIT(message_id));
+}
+
+static void rtl8169_clear_hw_isr(struct rtl8169_private *tp, int message_id)
+{
+ RTL_W32(tp, ISR_VEC_MAP_REG, BIT(message_id));
+}
+
+static void rtl8169_enable_hw_interrupt_msix(struct rtl8169_private *tp,
+ int message_id)
+{
+ RTL_W32(tp, IMR_SET_VEC_MAP_REG, BIT(message_id));
+}
+
+static irqreturn_t rtl8169_interrupt_msix(int irq, void *dev_instance)
+{
+ struct napi_struct *napi = dev_instance;
+ struct net_device *dev = napi->dev;
+ struct rtl8169_private *tp;
+ int message_id;
+
+ tp = netdev_priv(dev);
+ message_id = napi - tp->rtl8169_napi;
+
+ rtl8169_disable_hw_interrupt_msix(tp, message_id);
+ rtl8169_clear_hw_isr(tp, message_id);
+
+ napi_schedule(napi);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t rtl8169_interrupt_other(int irq, void *dev_instance)
+{
+ struct rtl8169_private *tp = dev_instance;
+
+ rtl8169_clear_hw_isr(tp, MSIX_ID_VEC_MAP_LINKCHG);
+ phy_mac_interrupt(tp->phydev);
+ return IRQ_HANDLED;
}
static int rtl8169_request_irq(struct rtl8169_private *tp)
@@ -5047,8 +5124,26 @@ static int rtl8169_request_irq(struct rtl8169_private *tp)
for (i = 0; i < tp->irq_nvecs; i++) {
napi = &tp->rtl8169_napi[i];
- rc = pci_request_irq(tp->pci_dev, i, rtl8169_interrupt,
- NULL, napi, "%s-%d", dev->name, i);
+ if (tp->irq_nvecs > 1) {
+ if (i < R8169_MAX_QUEUES)
+ rc = pci_request_irq(tp->pci_dev, i,
+ rtl8169_interrupt_msix,
+ NULL, napi, "%s-%d",
+ dev->name, i);
+ else if (i == MSIX_ID_VEC_MAP_LINKCHG)
+ rc = pci_request_irq(tp->pci_dev, i,
+ rtl8169_interrupt_other,
+ NULL, tp, "%s-%d",
+ dev->name, i);
+ else
+ continue;
+ } else {
+ rc = pci_request_irq(tp->pci_dev, i,
+ rtl8169_interrupt,
+ NULL, napi, "%s-%d",
+ dev->name, i);
+ }
+
if (rc)
goto free_irq;
}
@@ -5056,7 +5151,7 @@ static int rtl8169_request_irq(struct rtl8169_private *tp)
free_irq:
while (--i >= 0)
- pci_free_irq(tp->pci_dev, i, &tp->rtl8169_napi[i]);
+ rtl8169_free_one_irq(tp, i);
return rc;
}
@@ -5255,8 +5350,12 @@ static void rtl8169_netpoll(struct net_device *dev)
struct rtl8169_private *tp = netdev_priv(dev);
for (int i = 0; i < tp->irq_nvecs; i++) {
- rtl8169_interrupt(pci_irq_vector(tp->pci_dev, i),
- &tp->rtl8169_napi[i]);
+ if (tp->irq_nvecs > 1)
+ rtl8169_interrupt_msix(pci_irq_vector(tp->pci_dev, i),
+ &tp->rtl8169_napi[i]);
+ else
+ rtl8169_interrupt(pci_irq_vector(tp->pci_dev, i),
+ &tp->rtl8169_napi[i]);
}
}
#endif
@@ -5454,7 +5553,9 @@ static void rtl_shutdown(struct pci_dev *pdev)
static void r8169_free_napi(struct rtl8169_private *tp)
{
- for (int i = 0; i < tp->irq_nvecs; i++)
+ int napi_num = min(tp->irq_nvecs, R8169_MAX_QUEUES);
+
+ for (int i = 0; i < napi_num; i++)
netif_napi_del(&tp->rtl8169_napi[i]);
kfree(tp->rtl8169_napi);
@@ -5508,10 +5609,16 @@ static const struct net_device_ops rtl_netdev_ops = {
static void rtl_set_irq_mask(struct rtl8169_private *tp)
{
- tp->irq_mask = RxOK | RxErr | TxOK | TxErr | LinkChg;
+ if (tp->irq_nvecs > 1) {
+ tp->irq_mask = ISRIMR_LINKCHG | ISRIMR_TOK_Q0;
+ for (int i = 0; i < tp->num_rx_rings; i++)
+ tp->irq_mask |= ISRIMR_ROK_Q0 << i;
+ } else {
+ tp->irq_mask = RxOK | RxErr | TxOK | TxErr | LinkChg;
- if (tp->mac_version <= RTL_GIGA_MAC_VER_06)
- tp->irq_mask |= SYSErr | RxFIFOOver;
+ if (tp->mac_version <= RTL_GIGA_MAC_VER_06)
+ tp->irq_mask |= SYSErr | RxFIFOOver;
+ }
}
static int rtl_alloc_irq(struct rtl8169_private *tp)
@@ -5796,10 +5903,64 @@ static bool rtl_aspm_is_safe(struct rtl8169_private *tp)
return false;
}
+static int rtl8169_poll_msix_rx(struct napi_struct *napi, int budget)
+{
+ struct net_device *dev = napi->dev;
+ struct rtl8169_private *tp;
+ int work_done = 0;
+ int message_id;
+
+ tp = netdev_priv(dev);
+ message_id = napi - tp->rtl8169_napi;
+
+ if (message_id < tp->num_rx_rings)
+ work_done += rtl_rx(dev, tp, &tp->rx_ring[message_id],
+ budget, napi);
+
+ if (work_done < budget && napi_complete_done(napi, work_done))
+ rtl8169_enable_hw_interrupt_msix(tp, message_id);
+
+ return work_done;
+}
+
+static int rtl8169_poll_msix_tx(struct napi_struct *napi, int budget)
+{
+ struct net_device *dev = napi->dev;
+ struct rtl8169_private *tp;
+
+ tp = netdev_priv(dev);
+
+ /* Currently r8169 only supports a single Tx ring.
+ * Therefore, we don't need a per-ring Tx processing loop here.
+ */
+ rtl_tx(dev, tp, budget);
+
+ if (napi_complete_done(napi, 0))
+ rtl8169_enable_hw_interrupt_msix(tp, (int)(napi - tp->rtl8169_napi));
+
+ return 0;
+}
+
+/* RTL8127 MSI-X vector layout:
+ * Vectors 0 .. (RxQs - 1) : Rx Queues
+ * Vectors RxQs .. (RxQs + TxQs - 1) : Tx Queues
+ * NAPI is only allocated for data path
+ */
static void r8169_init_napi(struct rtl8169_private *tp)
{
- for (int i = 0; i < tp->irq_nvecs; i++)
- netif_napi_add(tp->dev, &tp->rtl8169_napi[i], rtl8169_poll);
+ int napi_num = min(tp->irq_nvecs, R8169_MAX_QUEUES);
+
+ for (int i = 0; i < napi_num; i++) {
+ int (*poll_fn)(struct napi_struct *, int) = rtl8169_poll;
+
+ if (tp->irq_nvecs > 1) {
+ if (i < R8169_MAX_RX_QUEUES)
+ poll_fn = rtl8169_poll_msix_rx;
+ else
+ poll_fn = rtl8169_poll_msix_tx;
+ }
+ netif_napi_add(tp->dev, &tp->rtl8169_napi[i], poll_fn);
+ }
}
static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
--
2.43.0
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH net-next v11 4/7] r8169: enable new interrupt mapping
2026-08-14 1:51 [PATCH net-next v11 0/7] r8169: add RSS support for RTL8127 javen
` (2 preceding siblings ...)
2026-08-14 1:51 ` [PATCH net-next v11 3/7] r8169: add support for new interrupt mapping javen
@ 2026-08-14 1:52 ` javen
2026-08-14 22:54 ` Mohsin Bashir
2026-08-17 23:38 ` Jakub Kicinski
2026-08-14 1:52 ` [PATCH net-next v11 5/7] r8169: add support and enable rss javen
` (2 subsequent siblings)
6 siblings, 2 replies; 14+ messages in thread
From: javen @ 2026-08-14 1:52 UTC (permalink / raw)
To: hkallweit1, nic_swsd, andrew+netdev, davem, edumazet, kuba,
pabeni, horms
Cc: netdev, linux-kernel, Javen Xu
From: Javen Xu <javen_xu@realsil.com.cn>
This patch enables new interrupt mapping for RTL8127 and add error pkts
counter per ring.
Signed-off-by: Javen Xu <javen_xu@realsil.com.cn>
---
Changes in v2:
- no changes
Changes in v3:
- no changes
Changes in v4:
- no changes
Changes in v5:
- no changes
Changes in v6:
- no changes
Changes in v7:
- no changes
Changes in v8:
- no changes
Changes in v9:
- no changes
Changes in v10:
- no changes
Changes in v11:
- add error pkts counter per ring
---
drivers/net/ethernet/realtek/r8169_main.c | 80 +++++++++++++++++++----
1 file changed, 68 insertions(+), 12 deletions(-)
diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index b30f0a31d7c7..aa72c42c374d 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -29,6 +29,7 @@
#include <linux/prefetch.h>
#include <linux/ipv6.h>
#include <linux/unaligned.h>
+#include <linux/u64_stats_sync.h>
#include <net/ip6_checksum.h>
#include <net/netdev_queues.h>
#include <net/phy/realtek_phy.h>
@@ -754,6 +755,15 @@ struct rtl8169_rx_ring {
dma_addr_t rx_desc_phy_addr[NUM_RX_DESC];
dma_addr_t rx_phy_addr;
struct page *rx_databuff[NUM_RX_DESC];
+
+ struct {
+ u64 rx_errors;
+ u64 rx_dropped;
+ u64 rx_length_errors;
+ u64 rx_crc_errors;
+ u64 multicast;
+ struct u64_stats_sync syncp;
+ } stats;
};
struct rtl8169_private {
@@ -3939,6 +3949,15 @@ DECLARE_RTL_COND(rtl_mac_ocp_e00e_cond)
return r8168_mac_ocp_read(tp, 0xe00e) & BIT(13);
}
+static void rtl8169_hw_enable_vec_mapping(struct rtl8169_private *tp)
+{
+ u8 tmp;
+
+ tmp = RTL_R8(tp, INT_CFG0_8125);
+ tmp |= INT_CFG0_ENABLE_8125;
+ RTL_W8(tp, INT_CFG0_8125, tmp);
+}
+
static void rtl_hw_start_8125_common(struct rtl8169_private *tp)
{
rtl_pcie_state_l2l3_disable(tp);
@@ -3947,6 +3966,9 @@ static void rtl_hw_start_8125_common(struct rtl8169_private *tp)
RTL_W32(tp, RSS_CTRL_8125, 0);
RTL_W16(tp, Q_NUM_CTRL_8125, 0);
+ if (tp->irq_nvecs > 1)
+ rtl8169_hw_enable_vec_mapping(tp);
+
/* disable UPS */
r8168_mac_ocp_modify(tp, 0xd40a, 0x0010, 0x0000);
@@ -4347,7 +4369,7 @@ static int rtl8169_init_ring(struct rtl8169_private *tp)
memset(tp->tx_skb, 0, sizeof(tp->tx_skb));
- for (i = 0; i < tp->num_rx_rings; i++) {
+ for (int i = 0; i < tp->num_rx_rings; i++) {
struct rtl8169_rx_ring *ring = &tp->rx_ring[i];
memset(ring->rx_databuff, 0, sizeof(ring->rx_databuff));
@@ -4926,15 +4948,16 @@ static inline void rtl8169_rx_csum(struct sk_buff *skb,
skb_checksum_none_assert(skb);
}
-static bool rtl8169_check_rx_desc_error(struct net_device *dev,
- struct rtl8169_private *tp,
+static bool rtl8169_check_rx_desc_error(struct rtl8169_rx_ring *ring,
u32 status)
{
if (unlikely(status & RxRES)) {
+ u64_stats_update_begin(&ring->stats.syncp);
if (status & (RxRWT | RxRUNT))
- dev->stats.rx_length_errors++;
+ ring->stats.rx_length_errors++;
if (status & RxCRC)
- dev->stats.rx_crc_errors++;
+ ring->stats.rx_crc_errors++;
+ u64_stats_update_end(&ring->stats.syncp);
return true;
}
return false;
@@ -4965,11 +4988,13 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp,
*/
dma_rmb();
- if (rtl8169_check_rx_desc_error(dev, tp, status)) {
+ if (rtl8169_check_rx_desc_error(ring, status)) {
if (net_ratelimit())
netdev_warn(dev, "Rx ERROR. status = %08x\n",
status);
- dev->stats.rx_errors++;
+ u64_stats_update_begin(&ring->stats.syncp);
+ ring->stats.rx_errors++;
+ u64_stats_update_end(&ring->stats.syncp);
if (!(dev->features & NETIF_F_RXALL))
goto release_descriptor;
@@ -4985,14 +5010,18 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp,
* They are seen as a symptom of over-mtu sized frames.
*/
if (unlikely(rtl8169_fragmented_frame(status))) {
- dev->stats.rx_dropped++;
- dev->stats.rx_length_errors++;
+ u64_stats_update_begin(&ring->stats.syncp);
+ ring->stats.rx_dropped++;
+ ring->stats.rx_length_errors++;
+ u64_stats_update_end(&ring->stats.syncp);
goto release_descriptor;
}
skb = napi_alloc_skb(napi, pkt_size);
if (unlikely(!skb)) {
- dev->stats.rx_dropped++;
+ u64_stats_update_begin(&ring->stats.syncp);
+ ring->stats.rx_dropped++;
+ u64_stats_update_end(&ring->stats.syncp);
goto release_descriptor;
}
@@ -5011,8 +5040,11 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp,
rtl8169_rx_vlan_tag(desc, skb);
- if (skb->pkt_type == PACKET_MULTICAST)
- dev->stats.multicast++;
+ if (skb->pkt_type == PACKET_MULTICAST) {
+ u64_stats_update_begin(&ring->stats.syncp);
+ ring->stats.multicast++;
+ u64_stats_update_end(&ring->stats.syncp);
+ }
napi_gro_receive(napi, skb);
@@ -5428,6 +5460,27 @@ rtl8169_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
netdev_stats_to_stats64(stats, &dev->stats);
dev_fetch_sw_netstats(stats, dev->tstats);
+ for (int i = 0; i < tp->num_rx_rings; i++) {
+ u64 errors, dropped, length_errors, crc_errors, multicast;
+ struct rtl8169_rx_ring *ring = &tp->rx_ring[i];
+ unsigned int start;
+
+ do {
+ start = u64_stats_fetch_begin(&ring->stats.syncp);
+ errors = ring->stats.rx_errors;
+ dropped = ring->stats.rx_dropped;
+ length_errors = ring->stats.rx_length_errors;
+ crc_errors = ring->stats.rx_crc_errors;
+ multicast = ring->stats.multicast;
+ } while (u64_stats_fetch_retry(&ring->stats.syncp, start));
+
+ stats->rx_errors += errors;
+ stats->rx_dropped += dropped;
+ stats->rx_length_errors += length_errors;
+ stats->rx_crc_errors += crc_errors;
+ stats->multicast += multicast;
+ }
+
/*
* Fetch additional counter values missing in stats collected by driver
* from tally counters.
@@ -6166,6 +6219,9 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
if (!tp->rx_ring)
return -ENOMEM;
+ for (int i = 0; i < tp->num_rx_rings; i++)
+ u64_stats_init(&tp->rx_ring[i].stats.syncp);
+
tp->rtl8169_napi = kcalloc(tp->irq_nvecs, sizeof(struct napi_struct),
GFP_KERNEL);
if (!tp->rtl8169_napi) {
--
2.43.0
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH net-next v11 5/7] r8169: add support and enable rss
2026-08-14 1:51 [PATCH net-next v11 0/7] r8169: add RSS support for RTL8127 javen
` (3 preceding siblings ...)
2026-08-14 1:52 ` [PATCH net-next v11 4/7] r8169: enable " javen
@ 2026-08-14 1:52 ` javen
2026-08-14 23:00 ` Mohsin Bashir
2026-08-14 1:52 ` [PATCH net-next v11 6/7] r8169: move struct ethtool_ops javen
2026-08-14 1:52 ` [PATCH net-next v11 7/7] r8169: add get_channel support for ethtool javen
6 siblings, 1 reply; 14+ messages in thread
From: javen @ 2026-08-14 1:52 UTC (permalink / raw)
To: hkallweit1, nic_swsd, andrew+netdev, davem, edumazet, kuba,
pabeni, horms
Cc: netdev, linux-kernel, Javen Xu
From: Javen Xu <javen_xu@realsil.com.cn>
This patch adds support and enable rss for RTL8127.
Signed-off-by: Javen Xu <javen_xu@realsil.com.cn>
---
Changes in v2:
- some changes moved from Patch 2/7
Changes in v3:
- add struct rtl8169_rss_data. Allocate it dynamically when needed.
- define rss_key as an u32 array
- replace some magic bit numbers in rtl8169_set_rss_hash_opt() and
rtl8125_set_rx_q_num()
- use union to combine different rx descriptor, refactor struct RxDesc
- remove dead code from rtl8169_double_check_rss_support()
Changes in v4:
- rename macro definition, e.g R8127_MAX_IRQ to R8127_MAX_NUM_IRQVEC
- change hw_supp_indir_tbl_entries type to unsigned int
- change init_rx_desc_type type to enum
- remove rtl_check_rss_support(), add helper function
rtl_hw_support_rss()
- remove hw_curr_isr_ver, use irq_nvecs to judge whether we should
enable vector interrupt mapping, use tp->num_rx_ring to judge whether
we should enable rss
- remove function rtl8169_double_check_rss_support(), use
rtl8169_set_rx_ring_num() to set num_rx_ring according to tp->irq_nvecs
Changes in v5:
- no changes
Changes in v6:
- change rss_queue_num type from u8 to unsigned int
- fix rx desc clear in rtl8169_rx_clear() for different desc type
- clamping num_rx_ring with rounddown_pow_of_two()
Changes in v7:
- remove unused macro
- change unfixed type in rtl8169_store_reta
Changes in v8:
- refill desc->addr when rx_desc reset
- rtl8169_set_channels fixed in patch 7/7
Changes in v9:
- remove rtl8169_set_desc_dma_addr, only set desc dma addr for
RX_DESC_TYPE_RSS desc
Changes in v10:
- Change rss_key to u8 array and write rss_key_reg as u32 values.
Use get_unaligned_le32() to keep behavior consistent on big-endian
and little-endian
Changes in v11:
- fix compilation error by adding block in switch default case
- fix concurrency bug on updating global dev->stats by using per-queue
stat
- fix packet drop logic to properlly handle fatal errors when rss is
enable
- use get_unaligned_le32() uniformly in rtl8169_store_reta()
- fix coding style issues
- add comment on pci_alloc_irq_vectors() call
---
drivers/net/ethernet/realtek/r8169_main.c | 398 ++++++++++++++++++++--
1 file changed, 361 insertions(+), 37 deletions(-)
diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index aa72c42c374d..1b4416d32231 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -89,6 +89,19 @@
#define R8169_MAX_RX_QUEUES 8
#define R8169_DEFAULT_RX_QUEUES 1
#define R8169_MAX_TX_QUEUES 1
+#define R8127_MAX_NUM_IRQVEC 32
+#define R8127_MIN_NUM_IRQVEC 30
+#define R8169_IRQ_DEFAULT 1
+#define RTL_RSS_KEY_SIZE 40
+#define RSS_CPU_NUM_MASK GENMASK(18, 16)
+#define RSS_HASH_MASK GENMASK(10, 8)
+#define RTL_MAX_INDIRECTION_TABLE_ENTRIES 128
+#define RXS_RSS_UDP BIT(27)
+#define RXS_RSS_IPV4 BIT(28)
+#define RXS_RSS_IPV6 BIT(29)
+#define RXS_RSS_TCP BIT(30)
+#define RXS_RSS_L3_TYPE_MASK (RXS_RSS_IPV4 | RXS_RSS_IPV6)
+#define RXS_RSS_L4_TYPE_MASK (RXS_RSS_TCP | RXS_RSS_UDP)
#define OCP_STD_PHY_BASE 0xa400
@@ -491,6 +504,9 @@ enum rtl_register_content {
RxRUNT = (1 << 20),
RxCRC = (1 << 19),
+ RXRUNT_RSS = (1 << 21),
+ RXCRC_RSS = (1 << 20),
+
/* ChipCmdBits */
StopReq = 0x80,
CmdReset = 0x10,
@@ -596,6 +612,20 @@ enum rtl_register_content {
#define ISRIMR_LINKCHG BIT(29)
#define ISRIMR_TOK_Q0 BIT(8)
#define ISRIMR_ROK_Q0 BIT(0)
+#define RTL_DESC_TYPE_CTRL 0xd8
+#define RSS_KEY_REG 0x4600
+#define RSS_INDIRECTION_TBL_REG 0x4700
+#define RSS_CTRL_TCP_IPV4_SUPP BIT(0)
+#define RTL_DESC_TYPE_RSS BIT(1)
+#define RSS_CTRL_IPV4_SUPP BIT(1)
+#define RSS_CTRL_TCP_IPV6_SUPP BIT(2)
+#define RSS_CTRL_IPV6_SUPP BIT(3)
+#define RSS_CTRL_IPV6_EXT_SUPP BIT(4)
+#define RSS_CTRL_TCP_IPV6_EXT_SUPP BIT(5)
+#define RX_RES_RSS BIT(22)
+#define RX_RUNT_RSS BIT(21)
+#define RX_CRC_RSS BIT(20)
+#define RTL_RX_Q_NUM_MASK GENMASK(4, 2)
};
enum rtl_desc_bit {
@@ -653,6 +683,11 @@ enum rtl_rx_desc_bit {
#define RxProtoIP (PID1 | PID0)
#define RxProtoMask RxProtoIP
+#define RX_UDPT_DESC_RSS BIT(19)
+#define RX_TCPT_DESC_RSS BIT(18)
+#define RX_UDPF_DESC_RSS BIT(16) /* UDP/IP checksum failed */
+#define RX_TCPF_DESC_RSS BIT(15) /* TCP/IP checksum failed */
+
IPFail = (1 << 16), /* IP checksum failed */
UDPFail = (1 << 15), /* UDP/IP checksum failed */
TCPFail = (1 << 14), /* TCP/IP checksum failed */
@@ -674,9 +709,27 @@ struct TxDesc {
};
struct RxDesc {
- __le32 opts1;
- __le32 opts2;
- __le64 addr;
+ union {
+ /* RX_DESC_TYPE_DEFAULT */
+ struct {
+ __le32 opts1;
+ __le32 opts2;
+ __le64 addr;
+ };
+
+ /* RX_DESC_TYPE_RSS */
+ struct {
+ union {
+ __le64 rss_addr;
+ struct {
+ __le32 rss_info;
+ __le32 rss_result;
+ } rss_dword;
+ };
+ __le32 rss_opts2;
+ __le32 rss_opts1;
+ };
+ };
};
struct ring_info {
@@ -748,6 +801,11 @@ enum rtl_dash_type {
RTL_DASH_25_BP,
};
+enum rx_desc_type {
+ RX_DESC_TYPE_DEFAULT,
+ RX_DESC_TYPE_RSS,
+};
+
struct rtl8169_rx_ring {
u32 cur_rx;
u32 dirty_rx;
@@ -766,6 +824,12 @@ struct rtl8169_rx_ring {
} stats;
};
+struct rtl8169_rss_data {
+ u8 rss_key[RTL_RSS_KEY_SIZE];
+ u8 rss_indir_tbl[RTL_MAX_INDIRECTION_TABLE_ENTRIES];
+ unsigned int hw_supp_indir_tbl_entries;
+};
+
struct rtl8169_private {
void __iomem *mmio_addr; /* memory map physical address */
struct pci_dev *pci_dev;
@@ -785,7 +849,9 @@ struct rtl8169_private {
u16 tx_lpi_timer;
u32 irq_mask;
unsigned int hw_supp_num_rx_queues;
+ struct rtl8169_rss_data *rss_data;
unsigned int irq_nvecs;
+ enum rx_desc_type init_rx_desc_type;
struct clk *clk;
struct {
@@ -1615,6 +1681,11 @@ static bool rtl_dash_is_enabled(struct rtl8169_private *tp)
}
}
+static bool rtl_hw_support_rss(struct rtl8169_private *tp)
+{
+ return tp->mac_version == RTL_GIGA_MAC_VER_80;
+}
+
static enum rtl_dash_type rtl_get_dash_type(struct rtl8169_private *tp)
{
switch (tp->mac_version) {
@@ -1916,9 +1987,20 @@ static inline u32 rtl8169_tx_vlan_tag(struct sk_buff *skb)
TxVlanTag | swab16(skb_vlan_tag_get(skb)) : 0x00;
}
-static void rtl8169_rx_vlan_tag(struct RxDesc *desc, struct sk_buff *skb)
+static void rtl8169_rx_vlan_tag(struct rtl8169_private *tp,
+ struct RxDesc *desc,
+ struct sk_buff *skb)
{
- u32 opts2 = le32_to_cpu(desc->opts2);
+ u32 opts2;
+
+ switch (tp->init_rx_desc_type) {
+ case RX_DESC_TYPE_RSS:
+ opts2 = le32_to_cpu(desc->rss_opts2);
+ break;
+ default:
+ opts2 = le32_to_cpu(desc->opts2);
+ break;
+ }
if (opts2 & RxVlanTag)
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), swab16(opts2 & 0xffff));
@@ -2746,17 +2828,27 @@ static void rtl_hw_reset(struct rtl8169_private *tp)
rtl_loop_wait_low(tp, &rtl_chipcmd_cond, 100, 100);
}
+static void rtl8169_init_rss(struct rtl8169_private *tp)
+{
+ for (int i = 0; i < tp->rss_data->hw_supp_indir_tbl_entries; i++)
+ tp->rss_data->rss_indir_tbl[i] = ethtool_rxfh_indir_default(i, tp->num_rx_rings);
+
+ netdev_rss_key_fill(tp->rss_data->rss_key, RTL_RSS_KEY_SIZE);
+}
+
static void rtl_setup_rx_params(struct rtl8169_private *tp)
{
tp->num_rx_rings = 1;
switch (tp->mac_version) {
case RTL_GIGA_MAC_VER_80:
tp->hw_supp_num_rx_queues = R8169_MAX_RX_QUEUES;
+ tp->rss_data->hw_supp_indir_tbl_entries = RTL_MAX_INDIRECTION_TABLE_ENTRIES;
break;
default:
tp->hw_supp_num_rx_queues = R8169_DEFAULT_RX_QUEUES;
break;
}
+ tp->init_rx_desc_type = RX_DESC_TYPE_DEFAULT;
}
static void rtl_request_firmware(struct rtl8169_private *tp)
@@ -2881,6 +2973,56 @@ static void rtl_set_rx_max_size(struct rtl8169_private *tp)
RTL_W16(tp, RxMaxSize, R8169_RX_BUF_SIZE + 1);
}
+static void rtl8169_store_rss_key(struct rtl8169_private *tp)
+{
+ u8 *rss_key = tp->rss_data->rss_key;
+ const u16 rss_key_reg = RSS_KEY_REG;
+
+ /* Write redirection table to HW */
+ for (int i = 0; i < RTL_RSS_KEY_SIZE; i += sizeof(u32))
+ RTL_W32(tp, rss_key_reg + i, get_unaligned_le32(rss_key + i));
+}
+
+static void rtl8169_store_reta(struct rtl8169_private *tp)
+{
+ u8 *indir_tbl = tp->rss_data->rss_indir_tbl;
+ unsigned int i;
+
+ /* Write redirection table to HW */
+ for (i = 0; i < tp->rss_data->hw_supp_indir_tbl_entries; i += 4) {
+ u32 reta = get_unaligned_le32(&indir_tbl[i]);
+
+ RTL_W32(tp, RSS_INDIRECTION_TBL_REG + i, reta);
+ }
+}
+
+static void rtl8169_set_rss_hash_opt(struct rtl8169_private *tp)
+{
+ u32 rss_ctrl;
+
+ rss_ctrl = FIELD_PREP(RSS_CPU_NUM_MASK, ilog2(tp->num_rx_rings));
+
+ /* Perform hash on these packet types */
+ rss_ctrl |= RSS_CTRL_TCP_IPV4_SUPP |
+ RSS_CTRL_IPV4_SUPP |
+ RSS_CTRL_IPV6_SUPP |
+ RSS_CTRL_IPV6_EXT_SUPP |
+ RSS_CTRL_TCP_IPV6_SUPP |
+ RSS_CTRL_TCP_IPV6_EXT_SUPP;
+
+ rss_ctrl |= FIELD_PREP(RSS_HASH_MASK,
+ ilog2(tp->rss_data->hw_supp_indir_tbl_entries));
+
+ RTL_W32(tp, RSS_CTRL_8125, rss_ctrl);
+}
+
+static void rtl_set_rss_config(struct rtl8169_private *tp)
+{
+ rtl8169_set_rss_hash_opt(tp);
+ rtl8169_store_reta(tp);
+ rtl8169_store_rss_key(tp);
+}
+
static void rtl_set_rx_tx_desc_registers(struct rtl8169_private *tp)
{
struct rtl8169_rx_ring *ring = &tp->rx_ring[0];
@@ -3949,6 +4091,18 @@ DECLARE_RTL_COND(rtl_mac_ocp_e00e_cond)
return r8168_mac_ocp_read(tp, 0xe00e) & BIT(13);
}
+static void rtl8125_set_rx_q_num(struct rtl8169_private *tp)
+{
+ u16 rx_q_num;
+ u16 q_ctrl;
+
+ rx_q_num = ilog2(tp->num_rx_rings);
+ q_ctrl = RTL_R16(tp, Q_NUM_CTRL_8125);
+ q_ctrl &= ~RTL_RX_Q_NUM_MASK;
+ q_ctrl |= FIELD_PREP(RTL_RX_Q_NUM_MASK, rx_q_num);
+ RTL_W16(tp, Q_NUM_CTRL_8125, q_ctrl);
+}
+
static void rtl8169_hw_enable_vec_mapping(struct rtl8169_private *tp)
{
u8 tmp;
@@ -3988,6 +4142,13 @@ static void rtl_hw_start_8125_common(struct rtl8169_private *tp)
tp->mac_version == RTL_GIGA_MAC_VER_80)
RTL_W8(tp, 0xD8, RTL_R8(tp, 0xD8) & ~0x02);
+ /* enable rx descriptor type v4 and set queue num for rss */
+ if (tp->num_rx_rings > 1) {
+ rtl8125_set_rx_q_num(tp);
+ RTL_W8(tp, RTL_DESC_TYPE_CTRL,
+ RTL_R8(tp, RTL_DESC_TYPE_CTRL) | RTL_DESC_TYPE_RSS);
+ }
+
if (tp->mac_version == RTL_GIGA_MAC_VER_80)
r8168_mac_ocp_modify(tp, 0xe614, 0x0f00, 0x0f00);
else if (tp->mac_version == RTL_GIGA_MAC_VER_70)
@@ -4224,6 +4385,12 @@ static void rtl_hw_start(struct rtl8169_private *tp)
rtl_hw_aspm_clkreq_enable(tp, true);
rtl_set_rx_max_size(tp);
rtl_set_rx_tx_desc_registers(tp);
+ if (rtl_is_8125(tp)) {
+ if (tp->num_rx_rings > 1)
+ rtl_set_rss_config(tp);
+ else
+ RTL_W32(tp, RSS_CTRL_8125, 0x00);
+ }
rtl_lock_config_regs(tp);
rtl_jumbo_config(tp);
@@ -4251,14 +4418,26 @@ static int rtl8169_change_mtu(struct net_device *dev, int new_mtu)
return 0;
}
-static void rtl8169_mark_to_asic(struct RxDesc *desc)
+static void rtl8169_mark_to_asic(struct rtl8169_private *tp, struct RxDesc *desc)
{
- u32 eor = le32_to_cpu(desc->opts1) & RingEnd;
+ u32 eor;
- desc->opts2 = 0;
- /* Force memory writes to complete before releasing descriptor */
- dma_wmb();
- WRITE_ONCE(desc->opts1, cpu_to_le32(DescOwn | eor | R8169_RX_BUF_SIZE));
+ switch (tp->init_rx_desc_type) {
+ case RX_DESC_TYPE_RSS:
+ eor = le32_to_cpu(desc->rss_opts1) & RingEnd;
+ desc->rss_opts2 = cpu_to_le32(0);
+ /* Force memory writes to complete before releasing descriptor */
+ dma_wmb();
+ WRITE_ONCE(desc->rss_opts1, cpu_to_le32(DescOwn | eor | R8169_RX_BUF_SIZE));
+ break;
+ default:
+ eor = le32_to_cpu(desc->opts1) & RingEnd;
+ desc->opts2 = cpu_to_le32(0);
+ /* Force memory writes to complete before releasing descriptor */
+ dma_wmb();
+ WRITE_ONCE(desc->opts1, cpu_to_le32(DescOwn | eor | R8169_RX_BUF_SIZE));
+ break;
+ }
}
static struct page *rtl8169_alloc_rx_data(struct rtl8169_private *tp,
@@ -4281,9 +4460,12 @@ static struct page *rtl8169_alloc_rx_data(struct rtl8169_private *tp,
return NULL;
}
- desc->addr = cpu_to_le64(mapping);
ring->rx_desc_phy_addr[index] = mapping;
- rtl8169_mark_to_asic(desc);
+ if (tp->init_rx_desc_type == RX_DESC_TYPE_RSS)
+ desc->rss_addr = cpu_to_le64(mapping);
+ else
+ desc->addr = cpu_to_le64(mapping);
+ rtl8169_mark_to_asic(tp, desc);
return data;
}
@@ -4300,8 +4482,25 @@ static void rtl8169_rx_clear(struct rtl8169_private *tp,
__free_pages(ring->rx_databuff[i], get_order(R8169_RX_BUF_SIZE));
ring->rx_databuff[i] = NULL;
ring->rx_desc_phy_addr[i] = 0;
- ring->rx_desc_array[i].addr = 0;
- ring->rx_desc_array[i].opts1 = 0;
+ if (tp->init_rx_desc_type == RX_DESC_TYPE_RSS) {
+ ring->rx_desc_array[i].rss_addr = 0;
+ ring->rx_desc_array[i].rss_opts1 = 0;
+ } else {
+ ring->rx_desc_array[i].addr = 0;
+ ring->rx_desc_array[i].opts1 = 0;
+ }
+ }
+}
+
+static void rtl8169_mark_as_last_descriptor(struct rtl8169_private *tp, struct RxDesc *desc)
+{
+ switch (tp->init_rx_desc_type) {
+ case RX_DESC_TYPE_RSS:
+ desc->rss_opts1 |= cpu_to_le32(RingEnd);
+ break;
+ default:
+ desc->opts1 |= cpu_to_le32(RingEnd);
+ break;
}
}
@@ -4321,7 +4520,7 @@ static int rtl8169_rx_fill(struct rtl8169_private *tp, struct rtl8169_rx_ring *r
}
/* mark as last descriptor in the ring */
- ring->rx_desc_array[NUM_RX_DESC - 1].opts1 |= cpu_to_le32(RingEnd);
+ rtl8169_mark_as_last_descriptor(tp, &ring->rx_desc_array[NUM_RX_DESC - 1]);
return 0;
}
@@ -4480,8 +4679,13 @@ static void rtl8169_rx_desc_reset(struct rtl8169_private *tp)
for (int i = 0; i < tp->num_rx_rings; i++) {
struct rtl8169_rx_ring *ring = &tp->rx_ring[i];
- for (int j = 0; j < NUM_RX_DESC; j++)
- rtl8169_mark_to_asic(ring->rx_desc_array + j);
+ for (int j = 0; j < NUM_RX_DESC; j++) {
+ dma_addr_t phy_addr = ring->rx_desc_phy_addr[j];
+
+ if (tp->init_rx_desc_type == RX_DESC_TYPE_RSS)
+ ring->rx_desc_array[j].rss_addr = cpu_to_le64(phy_addr);
+ rtl8169_mark_to_asic(tp, ring->rx_desc_array + j);
+ }
}
}
@@ -4937,28 +5141,91 @@ static inline int rtl8169_fragmented_frame(u32 status)
return (status & (FirstFrag | LastFrag)) != (FirstFrag | LastFrag);
}
-static inline void rtl8169_rx_csum(struct sk_buff *skb,
+static inline void rtl8169_rx_hash(struct rtl8169_private *tp,
+ struct RxDesc *desc,
+ struct sk_buff *skb)
+{
+ u32 rss_header_info;
+ u32 hash_val;
+
+ if (!(tp->dev->features & NETIF_F_RXHASH))
+ return;
+
+ rss_header_info = le32_to_cpu(desc->rss_dword.rss_info);
+
+ if (!(rss_header_info & RXS_RSS_L3_TYPE_MASK))
+ return;
+
+ hash_val = le32_to_cpu(desc->rss_dword.rss_result);
+
+ skb_set_hash(skb, hash_val,
+ (RXS_RSS_L4_TYPE_MASK & rss_header_info) ?
+ PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
+}
+
+static inline void rtl8169_rx_csum(struct rtl8169_private *tp,
+ struct sk_buff *skb,
u32 opts1)
{
- u32 status = opts1 & (RxProtoMask | RxCSFailMask);
+ bool csum_ok = false;
+
+ switch (tp->init_rx_desc_type) {
+ case RX_DESC_TYPE_RSS:
+ if (((opts1 & RX_TCPT_DESC_RSS) && !(opts1 & RX_TCPF_DESC_RSS)) ||
+ ((opts1 & RX_UDPT_DESC_RSS) && !(opts1 & RX_UDPF_DESC_RSS)))
+ csum_ok = true;
+ break;
+ default: {
+ u32 status = opts1 & (RxProtoMask | RxCSFailMask);
+
+ if (status == RxProtoTCP || status == RxProtoUDP)
+ csum_ok = true;
+ break;
+ }
+ }
- if (status == RxProtoTCP || status == RxProtoUDP)
+ if (csum_ok)
skb->ip_summed = CHECKSUM_UNNECESSARY;
else
skb_checksum_none_assert(skb);
}
+static __le32 rtl8169_rx_desc_opts1(struct rtl8169_private *tp, struct RxDesc *desc)
+{
+ switch (tp->init_rx_desc_type) {
+ case RX_DESC_TYPE_RSS:
+ return READ_ONCE(desc->rss_opts1);
+ default:
+ return READ_ONCE(desc->opts1);
+ }
+}
+
static bool rtl8169_check_rx_desc_error(struct rtl8169_rx_ring *ring,
+ struct rtl8169_private *tp,
u32 status)
{
- if (unlikely(status & RxRES)) {
- u64_stats_update_begin(&ring->stats.syncp);
- if (status & (RxRWT | RxRUNT))
- ring->stats.rx_length_errors++;
- if (status & RxCRC)
- ring->stats.rx_crc_errors++;
- u64_stats_update_end(&ring->stats.syncp);
- return true;
+ switch (tp->init_rx_desc_type) {
+ case RX_DESC_TYPE_RSS:
+ if (unlikely(status & RX_RES_RSS)) {
+ u64_stats_update_begin(&ring->stats.syncp);
+ if (status & RX_RUNT_RSS)
+ ring->stats.rx_length_errors++;
+ if (status & RX_CRC_RSS)
+ ring->stats.rx_crc_errors++;
+ u64_stats_update_end(&ring->stats.syncp);
+ return true;
+ }
+ break;
+ default:
+ if (unlikely(status & RxRES)) {
+ u64_stats_update_begin(&ring->stats.syncp);
+ if (status & (RxRWT | RxRUNT))
+ ring->stats.rx_length_errors++;
+ if (status & RxCRC)
+ ring->stats.rx_crc_errors++;
+ u64_stats_update_end(&ring->stats.syncp);
+ return true;
+ }
}
return false;
}
@@ -4978,7 +5245,7 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp,
dma_addr_t addr;
u32 status;
- status = le32_to_cpu(READ_ONCE(desc->opts1));
+ status = le32_to_cpu(rtl8169_rx_desc_opts1(tp, desc));
if (status & DescOwn)
break;
@@ -4988,7 +5255,7 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp,
*/
dma_rmb();
- if (rtl8169_check_rx_desc_error(ring, status)) {
+ if (rtl8169_check_rx_desc_error(ring, tp, status)) {
if (net_ratelimit())
netdev_warn(dev, "Rx ERROR. status = %08x\n",
status);
@@ -4998,8 +5265,14 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp,
if (!(dev->features & NETIF_F_RXALL))
goto release_descriptor;
- else if (status & RxRWT || !(status & (RxRUNT | RxCRC)))
- goto release_descriptor;
+
+ if (tp->init_rx_desc_type == RX_DESC_TYPE_DEFAULT) {
+ if (status & RxRWT || !(status & (RxRUNT | RxCRC)))
+ goto release_descriptor;
+ } else {
+ if (!(status & (RXRUNT_RSS | RXCRC_RSS)))
+ goto release_descriptor;
+ }
}
pkt_size = status & GENMASK(13, 0);
@@ -5035,10 +5308,12 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp,
skb->len = pkt_size;
dma_sync_single_for_device(d, addr, pkt_size, DMA_FROM_DEVICE);
- rtl8169_rx_csum(skb, status);
+ if (tp->num_rx_rings > 1)
+ rtl8169_rx_hash(tp, desc, skb);
+ rtl8169_rx_csum(tp, skb, status);
skb->protocol = eth_type_trans(skb, dev);
- rtl8169_rx_vlan_tag(desc, skb);
+ rtl8169_rx_vlan_tag(tp, desc, skb);
if (skb->pkt_type == PACKET_MULTICAST) {
u64_stats_update_begin(&ring->stats.syncp);
@@ -5050,7 +5325,9 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp,
dev_sw_netstats_rx_add(dev, pkt_size);
release_descriptor:
- rtl8169_mark_to_asic(desc);
+ if (tp->init_rx_desc_type == RX_DESC_TYPE_RSS)
+ desc->rss_addr = cpu_to_le64(ring->rx_desc_phy_addr[entry]);
+ rtl8169_mark_to_asic(tp, desc);
}
return count;
@@ -5674,6 +5951,32 @@ static void rtl_set_irq_mask(struct rtl8169_private *tp)
}
}
+static int get_max_irq_nvecs(struct rtl8169_private *tp)
+{
+ if (tp->mac_version == RTL_GIGA_MAC_VER_80)
+ return R8127_MAX_NUM_IRQVEC;
+ return R8169_IRQ_DEFAULT;
+}
+
+static int get_min_irq_nvecs(struct rtl8169_private *tp)
+{
+ if (tp->mac_version == RTL_GIGA_MAC_VER_80)
+ return R8127_MIN_NUM_IRQVEC;
+ return R8169_IRQ_DEFAULT;
+}
+
+static void rtl8169_set_rx_ring_num(struct rtl8169_private *tp)
+{
+ if (tp->irq_nvecs >= get_min_irq_nvecs(tp)) {
+ unsigned int rss_queue_num = netif_get_num_default_rss_queues();
+
+ tp->num_rx_rings = rounddown_pow_of_two(min(rss_queue_num,
+ tp->hw_supp_num_rx_queues));
+ if (tp->num_rx_rings >= 2)
+ tp->init_rx_desc_type = RX_DESC_TYPE_RSS;
+ }
+}
+
static int rtl_alloc_irq(struct rtl8169_private *tp)
{
struct pci_dev *pdev = tp->pci_dev;
@@ -5694,7 +5997,11 @@ static int rtl_alloc_irq(struct rtl8169_private *tp)
break;
}
- nvecs = pci_alloc_irq_vectors(pdev, 1, 1, flags);
+ nvecs = pci_alloc_irq_vectors(pdev, get_min_irq_nvecs(tp),
+ get_max_irq_nvecs(tp), flags);
+
+ if (nvecs < 0)
+ nvecs = pci_alloc_irq_vectors(pdev, 1, 1, flags);
if (nvecs < 0)
return nvecs;
@@ -6109,6 +6416,13 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
tp->dash_type = rtl_get_dash_type(tp);
tp->dash_enabled = rtl_dash_is_enabled(tp);
+ if (rtl_hw_support_rss(tp)) {
+ tp->rss_data = devm_kzalloc(&pdev->dev, sizeof(*tp->rss_data),
+ GFP_KERNEL);
+ if (!tp->rss_data)
+ return -ENOMEM;
+ }
+
tp->cp_cmd = RTL_R16(tp, CPlusCmd) & CPCMD_MASK;
if (sizeof(dma_addr_t) > 4 && tp->mac_version >= RTL_GIGA_MAC_VER_18 &&
@@ -6129,6 +6443,11 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
if (rc < 0)
return dev_err_probe(&pdev->dev, rc, "Can't allocate interrupt\n");
+ rtl8169_set_rx_ring_num(tp);
+
+ if (rtl_hw_support_rss(tp))
+ rtl8169_init_rss(tp);
+
INIT_WORK(&tp->wk.work, rtl_task);
disable_work(&tp->wk.work);
@@ -6141,6 +6460,11 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
dev->vlan_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO;
dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
+ if (rtl_hw_support_rss(tp) && tp->num_rx_rings > 1) {
+ dev->hw_features |= NETIF_F_RXHASH;
+ dev->features |= NETIF_F_RXHASH;
+ }
+
/*
* Pretend we are using VLANs; This bypasses a nasty bug where
* Interrupts stop flowing on high load on 8110SCd controllers.
--
2.43.0
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH net-next v11 6/7] r8169: move struct ethtool_ops
2026-08-14 1:51 [PATCH net-next v11 0/7] r8169: add RSS support for RTL8127 javen
` (4 preceding siblings ...)
2026-08-14 1:52 ` [PATCH net-next v11 5/7] r8169: add support and enable rss javen
@ 2026-08-14 1:52 ` javen
2026-08-14 1:52 ` [PATCH net-next v11 7/7] r8169: add get_channel support for ethtool javen
6 siblings, 0 replies; 14+ messages in thread
From: javen @ 2026-08-14 1:52 UTC (permalink / raw)
To: hkallweit1, nic_swsd, andrew+netdev, davem, edumazet, kuba,
pabeni, horms
Cc: netdev, linux-kernel, Javen Xu
From: Javen Xu <javen_xu@realsil.com.cn>
The patch moves the rtl8169_ethtool_ops definition further down in
r8169_main.c so that subsequent additions of rtl8169_get_channels and
rtl8169_set_channels can be referenced from the ops struct without
needing forward declarations.
Signed-off-by: Javen Xu <javen_xu@realsil.com.cn>
---
Changes in v2:
- no changes
Changes in v3:
- no changes
Changes in v4:
- no changes
Changes in v5:
- no changes
Changes in v6:
- modify commit message
Changes in v7:
- no changes
Changes in v8:
- no changes
Changes in v9:
- no changes
Changes in v10:
- no changes
Changes in v11:
- no changes
---
drivers/net/ethernet/realtek/r8169_main.c | 56 +++++++++++------------
1 file changed, 28 insertions(+), 28 deletions(-)
diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 1b4416d32231..e4a944727bbb 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -2547,34 +2547,6 @@ static int rtl8169_set_link_ksettings(struct net_device *ndev,
return 0;
}
-static const struct ethtool_ops rtl8169_ethtool_ops = {
- .supported_coalesce_params = ETHTOOL_COALESCE_USECS |
- ETHTOOL_COALESCE_MAX_FRAMES,
- .get_drvinfo = rtl8169_get_drvinfo,
- .get_regs_len = rtl8169_get_regs_len,
- .get_link = ethtool_op_get_link,
- .get_coalesce = rtl_get_coalesce,
- .set_coalesce = rtl_set_coalesce,
- .get_regs = rtl8169_get_regs,
- .get_wol = rtl8169_get_wol,
- .set_wol = rtl8169_set_wol,
- .get_strings = rtl8169_get_strings,
- .get_sset_count = rtl8169_get_sset_count,
- .get_ethtool_stats = rtl8169_get_ethtool_stats,
- .get_ts_info = ethtool_op_get_ts_info,
- .nway_reset = phy_ethtool_nway_reset,
- .get_eee = rtl8169_get_eee,
- .set_eee = rtl8169_set_eee,
- .get_link_ksettings = phy_ethtool_get_link_ksettings,
- .set_link_ksettings = rtl8169_set_link_ksettings,
- .get_ringparam = rtl8169_get_ringparam,
- .get_pause_stats = rtl8169_get_pause_stats,
- .get_pauseparam = rtl8169_get_pauseparam,
- .set_pauseparam = rtl8169_set_pauseparam,
- .get_eth_mac_stats = rtl8169_get_eth_mac_stats,
- .get_eth_ctrl_stats = rtl8169_get_eth_ctrl_stats,
-};
-
static const struct rtl_chip_info *rtl8169_get_chip_version(u32 xid, bool gmii)
{
/* Chips combining a 1Gbps MAC with a 100Mbps PHY */
@@ -6323,6 +6295,34 @@ static void r8169_init_napi(struct rtl8169_private *tp)
}
}
+static const struct ethtool_ops rtl8169_ethtool_ops = {
+ .supported_coalesce_params = ETHTOOL_COALESCE_USECS |
+ ETHTOOL_COALESCE_MAX_FRAMES,
+ .get_drvinfo = rtl8169_get_drvinfo,
+ .get_regs_len = rtl8169_get_regs_len,
+ .get_link = ethtool_op_get_link,
+ .get_coalesce = rtl_get_coalesce,
+ .set_coalesce = rtl_set_coalesce,
+ .get_regs = rtl8169_get_regs,
+ .get_wol = rtl8169_get_wol,
+ .set_wol = rtl8169_set_wol,
+ .get_strings = rtl8169_get_strings,
+ .get_sset_count = rtl8169_get_sset_count,
+ .get_ethtool_stats = rtl8169_get_ethtool_stats,
+ .get_ts_info = ethtool_op_get_ts_info,
+ .nway_reset = phy_ethtool_nway_reset,
+ .get_eee = rtl8169_get_eee,
+ .set_eee = rtl8169_set_eee,
+ .get_link_ksettings = phy_ethtool_get_link_ksettings,
+ .set_link_ksettings = rtl8169_set_link_ksettings,
+ .get_ringparam = rtl8169_get_ringparam,
+ .get_pause_stats = rtl8169_get_pause_stats,
+ .get_pauseparam = rtl8169_get_pauseparam,
+ .set_pauseparam = rtl8169_set_pauseparam,
+ .get_eth_mac_stats = rtl8169_get_eth_mac_stats,
+ .get_eth_ctrl_stats = rtl8169_get_eth_ctrl_stats,
+};
+
static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
{
const struct rtl_chip_info *chip;
--
2.43.0
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH net-next v11 7/7] r8169: add get_channel support for ethtool
2026-08-14 1:51 [PATCH net-next v11 0/7] r8169: add RSS support for RTL8127 javen
` (5 preceding siblings ...)
2026-08-14 1:52 ` [PATCH net-next v11 6/7] r8169: move struct ethtool_ops javen
@ 2026-08-14 1:52 ` javen
6 siblings, 0 replies; 14+ messages in thread
From: javen @ 2026-08-14 1:52 UTC (permalink / raw)
To: hkallweit1, nic_swsd, andrew+netdev, davem, edumazet, kuba,
pabeni, horms
Cc: netdev, linux-kernel, Javen Xu
From: Javen Xu <javen_xu@realsil.com.cn>
Add get_channel support for ethtool.
Signed-off-by: Javen Xu <javen_xu@realsil.com.cn>
---
Changes in v11:
- new file, no change
---
drivers/net/ethernet/realtek/r8169_main.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index e4a944727bbb..13372fc55eee 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -6295,6 +6295,18 @@ static void r8169_init_napi(struct rtl8169_private *tp)
}
}
+static void rtl8169_get_channels(struct net_device *dev,
+ struct ethtool_channels *ch)
+{
+ struct rtl8169_private *tp = netdev_priv(dev);
+
+ ch->max_rx = tp->hw_supp_num_rx_queues;
+ ch->max_tx = 1;
+
+ ch->rx_count = tp->num_rx_rings;
+ ch->tx_count = 1;
+}
+
static const struct ethtool_ops rtl8169_ethtool_ops = {
.supported_coalesce_params = ETHTOOL_COALESCE_USECS |
ETHTOOL_COALESCE_MAX_FRAMES,
@@ -6313,6 +6325,7 @@ static const struct ethtool_ops rtl8169_ethtool_ops = {
.nway_reset = phy_ethtool_nway_reset,
.get_eee = rtl8169_get_eee,
.set_eee = rtl8169_set_eee,
+ .get_channels = rtl8169_get_channels,
.get_link_ksettings = phy_ethtool_get_link_ksettings,
.set_link_ksettings = rtl8169_set_link_ksettings,
.get_ringparam = rtl8169_get_ringparam,
--
2.43.0
^ permalink raw reply related [flat|nested] 14+ messages in thread
* Re: [PATCH net-next v11 3/7] r8169: add support for new interrupt mapping
2026-08-14 1:51 ` [PATCH net-next v11 3/7] r8169: add support for new interrupt mapping javen
@ 2026-08-14 22:45 ` Mohsin Bashir
2026-08-17 7:21 ` Javen
0 siblings, 1 reply; 14+ messages in thread
From: Mohsin Bashir @ 2026-08-14 22:45 UTC (permalink / raw)
To: javen, hkallweit1, nic_swsd, andrew+netdev, davem, edumazet, kuba,
pabeni, horms
Cc: netdev, linux-kernel
On 8/13/26 6:51 PM, javen wrote:
> From: Javen Xu <javen_xu@realsil.com.cn>
>
> To support RSS, the number of hardware interrupt bits should match the
> interrupt of software. So we add support for new interrupt mapping here.
> ISR_VEC_MAP_REG is the hardware register to indicate interrupt status.
> IMR_SET_VEC_MAP_REG is interrupt mask which is set to enable irq.
>
> Signed-off-by: Javen Xu <javen_xu@realsil.com.cn>
> ---
> Changes in v2:
> - no changes
>
> Changes in v3:
> - init index in napi_struct and get message_id from index
> - move rtl8169_disable_hw_interrupt_msix directly before the call to
> napi_schedule()
> - change the condition in rtl8169_request_irq when RTL_VEC_MAP_ENABLE
> enabled, use rtl8169_interrupt_msix
>
> Changes in v4:
> - remove flag tp->feature, replace tp->features & RTL_VEC_MAP_ENABLE
> with tp->irq_nvecs > 1, they are equivalent.
> - follow reverse xmas tree, in rtl8169_interrupt_msix(),
> rtl8169_poll_msix_rx(), rtl8169_poll_msix_tx(),
> rtl8169_poll_msix_other()
> - use napi->index in rtl8169_poll_msix_other()
> - add a comment to describe RTL8127 MSI-X vector layout
> - simplify r8169_init_napi()
>
> Changes in v5:
> - replace magic number in rtl8169_poll_msix_tx()
>
> Changes in v6:
> - when irq_nvecs <= 1, use register IntrMask_8125, else using vec map
> - fix irq sequence in rtl8169_interrupt_msix(), disable interrupts
> before clean it
> - remove dead code in rtl8169_poll_msix_tx()
>
> Changes in v7:
> - remove recheck_desc_ownbit
> - change return value of rtl_tx
> - remove message_id which only used once
>
> Changes in v8:
> - fix rtl8169_netpoll()
> - remove tx_done
>
> Changes in v9:
> - change the way of getting message_id of napi
>
> Changes in v10:
> - no changes
>
> Changes in v11:
> - add comment on rtl8169_poll_msix_tx, only use 1 tx
> - remove napi for other. Separate napi only for datapath, control path
> like linkchg is handled in interrupt function, which will not call
> napi any more.
> ---
> drivers/net/ethernet/realtek/r8169_main.c | 213 +++++++++++++++++++---
> 1 file changed, 187 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
> index 9311a0cab4eb..b30f0a31d7c7 100644
> --- a/drivers/net/ethernet/realtek/r8169_main.c
> +++ b/drivers/net/ethernet/realtek/r8169_main.c
> @@ -84,6 +84,7 @@
> #define R8169_RX_RING_BYTES ((NUM_RX_DESC + 1) * sizeof(struct RxDesc))
> #define R8169_TX_STOP_THRS (MAX_SKB_FRAGS + 1)
> #define R8169_TX_START_THRS (2 * R8169_TX_STOP_THRS)
> +#define R8169_MAX_QUEUES 16
> #define R8169_MAX_RX_QUEUES 8
> #define R8169_DEFAULT_RX_QUEUES 1
> #define R8169_MAX_TX_QUEUES 1
> @@ -455,8 +456,12 @@ enum rtl8125_registers {
> RSS_CTRL_8125 = 0x4500,
> Q_NUM_CTRL_8125 = 0x4800,
> EEE_TXIDLE_TIMER_8125 = 0x6048,
> + IMR_CLEAR_VEC_MAP_REG = 0x0d00,
> + ISR_VEC_MAP_REG = 0x0d04,
> + IMR_SET_VEC_MAP_REG = 0x0d0c,
> };
>
> +#define MSIX_ID_VEC_MAP_LINKCHG 29
> #define LEDSEL_MASK_8125 0x23f
>
> #define RX_VLAN_INNER_8125 BIT(22)
> @@ -587,6 +592,9 @@ enum rtl_register_content {
>
> /* magic enable v2 */
> MagicPacket_v2 = (1 << 16), /* Wake up when receives a Magic Packet */
> +#define ISRIMR_LINKCHG BIT(29)
> +#define ISRIMR_TOK_Q0 BIT(8)
> +#define ISRIMR_ROK_Q0 BIT(0)
> };
>
> enum rtl_desc_bit {
> @@ -1663,26 +1671,38 @@ static u32 rtl_get_events(struct rtl8169_private *tp)
>
> static void rtl_ack_events(struct rtl8169_private *tp, u32 bits)
> {
> - if (rtl_is_8125(tp))
> - RTL_W32(tp, IntrStatus_8125, bits);
> - else
> + if (rtl_is_8125(tp)) {
> + if (tp->irq_nvecs > 1)
> + RTL_W32(tp, ISR_VEC_MAP_REG, bits);
> + else
> + RTL_W32(tp, IntrStatus_8125, bits);
> + } else {
> RTL_W16(tp, IntrStatus, bits);
> + }
> }
>
> static void rtl_irq_disable(struct rtl8169_private *tp)
> {
> - if (rtl_is_8125(tp))
> - RTL_W32(tp, IntrMask_8125, 0);
> - else
> + if (rtl_is_8125(tp)) {
> + if (tp->irq_nvecs > 1)
> + RTL_W32(tp, IMR_CLEAR_VEC_MAP_REG, 0xffffffff);
> + else
> + RTL_W32(tp, IntrMask_8125, 0);
> + } else {
> RTL_W16(tp, IntrMask, 0);
> + }
> }
>
> static void rtl_irq_enable(struct rtl8169_private *tp)
> {
> - if (rtl_is_8125(tp))
> - RTL_W32(tp, IntrMask_8125, tp->irq_mask);
> - else
> + if (rtl_is_8125(tp)) {
> + if (tp->irq_nvecs > 1)
> + RTL_W32(tp, IMR_SET_VEC_MAP_REG, tp->irq_mask);
> + else
> + RTL_W32(tp, IntrMask_8125, tp->irq_mask);
> + } else {
> RTL_W16(tp, IntrMask, tp->irq_mask);
> + }
> }
>
> static void rtl8169_irq_mask_and_ack(struct rtl8169_private *tp)
> @@ -4382,13 +4402,17 @@ static void rtl8169_tx_clear(struct rtl8169_private *tp)
>
> static void rtl8169_napi_disable(struct rtl8169_private *tp)
> {
> - for (int i = 0; i < tp->irq_nvecs; i++)
> + int napi_num = min(tp->irq_nvecs, R8169_MAX_QUEUES);
> +
> + for (int i = 0; i < napi_num; i++)
> napi_disable(&tp->rtl8169_napi[i]);
> }
>
> static void rtl8169_napi_enable(struct rtl8169_private *tp)
> {
> - for (int i = 0; i < tp->irq_nvecs; i++)
> + int napi_num = min(tp->irq_nvecs, R8169_MAX_QUEUES);
> +
> + for (int i = 0; i < napi_num; i++)
> napi_enable(&tp->rtl8169_napi[i]);
> }
>
> @@ -5030,13 +5054,66 @@ static irqreturn_t rtl8169_interrupt(int irq, void *dev_instance)
> return IRQ_HANDLED;
> }
>
> +static void rtl8169_free_one_irq(struct rtl8169_private *tp, int i)
> +{
> + if (tp->irq_nvecs > 1) {
> + if (i < R8169_MAX_QUEUES)
> + pci_free_irq(tp->pci_dev, i, &tp->rtl8169_napi[i]);
> + else if (i == MSIX_ID_VEC_MAP_LINKCHG)
> + pci_free_irq(tp->pci_dev, i, tp);
> + } else {
> + pci_free_irq(tp->pci_dev, i, &tp->rtl8169_napi[i]);
> + }
> +}
> +
> static void rtl8169_free_irq(struct rtl8169_private *tp)
> {
> - for (int i = 0; i < tp->irq_nvecs; i++) {
> - struct napi_struct *napi = &tp->rtl8169_napi[i];
> + for (int i = 0; i < tp->irq_nvecs; i++)
> + rtl8169_free_one_irq(tp, i);
> +}
>
> - pci_free_irq(tp->pci_dev, i, napi);
> - }
> +static void rtl8169_disable_hw_interrupt_msix(struct rtl8169_private *tp,
> + int message_id)
> +{
> + RTL_W32(tp, IMR_CLEAR_VEC_MAP_REG, BIT(message_id));
> +}
> +
> +static void rtl8169_clear_hw_isr(struct rtl8169_private *tp, int message_id)
> +{
> + RTL_W32(tp, ISR_VEC_MAP_REG, BIT(message_id));
> +}
> +
> +static void rtl8169_enable_hw_interrupt_msix(struct rtl8169_private *tp,
> + int message_id)
> +{
> + RTL_W32(tp, IMR_SET_VEC_MAP_REG, BIT(message_id));
> +}
> +
> +static irqreturn_t rtl8169_interrupt_msix(int irq, void *dev_instance)
> +{
> + struct napi_struct *napi = dev_instance;
> + struct net_device *dev = napi->dev;
> + struct rtl8169_private *tp;
> + int message_id;
> +
> + tp = netdev_priv(dev);
> + message_id = napi - tp->rtl8169_napi;
> +
> + rtl8169_disable_hw_interrupt_msix(tp, message_id);
> + rtl8169_clear_hw_isr(tp, message_id);
> +
> + napi_schedule(napi);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static irqreturn_t rtl8169_interrupt_other(int irq, void *dev_instance)
> +{
> + struct rtl8169_private *tp = dev_instance;
> +
> + rtl8169_clear_hw_isr(tp, MSIX_ID_VEC_MAP_LINKCHG);
> + phy_mac_interrupt(tp->phydev);
> + return IRQ_HANDLED;
> }
>
> static int rtl8169_request_irq(struct rtl8169_private *tp)
> @@ -5047,8 +5124,26 @@ static int rtl8169_request_irq(struct rtl8169_private *tp)
>
> for (i = 0; i < tp->irq_nvecs; i++) {
> napi = &tp->rtl8169_napi[i];
> - rc = pci_request_irq(tp->pci_dev, i, rtl8169_interrupt,
> - NULL, napi, "%s-%d", dev->name, i);
> + if (tp->irq_nvecs > 1) {
> + if (i < R8169_MAX_QUEUES)
> + rc = pci_request_irq(tp->pci_dev, i,
> + rtl8169_interrupt_msix,
> + NULL, napi, "%s-%d",
> + dev->name, i);
> + else if (i == MSIX_ID_VEC_MAP_LINKCHG)
> + rc = pci_request_irq(tp->pci_dev, i,
> + rtl8169_interrupt_other,
> + NULL, tp, "%s-%d",
> + dev->name, i);
> + else
> + continue;
> + } else {
> + rc = pci_request_irq(tp->pci_dev, i,
> + rtl8169_interrupt,
> + NULL, napi, "%s-%d",
> + dev->name, i);
> + }
> +
> if (rc)
> goto free_irq;
> }
> @@ -5056,7 +5151,7 @@ static int rtl8169_request_irq(struct rtl8169_private *tp)
>
> free_irq:
> while (--i >= 0)
> - pci_free_irq(tp->pci_dev, i, &tp->rtl8169_napi[i]);
> + rtl8169_free_one_irq(tp, i);
> return rc;
> }
>
> @@ -5255,8 +5350,12 @@ static void rtl8169_netpoll(struct net_device *dev)
> struct rtl8169_private *tp = netdev_priv(dev);
>
> for (int i = 0; i < tp->irq_nvecs; i++) {
Looking at r8169_init_napi(), later down the patch, it only calls
netif_napi_add() for min(tp->irq_nvecs, R8169_MAX_QUEUES) vectors, but
this loop iterates all tp->irq_nvecs. Can this be an issue? Looks like
it will be because entries entries >= R8169_MAX_QUEUES are zeroed but
rtl8169_interrupt_msix() would set dev to NULL.
> - rtl8169_interrupt(pci_irq_vector(tp->pci_dev, i),
> - &tp->rtl8169_napi[i]);
> + if (tp->irq_nvecs > 1)
> + rtl8169_interrupt_msix(pci_irq_vector(tp->pci_dev, i),
> + &tp->rtl8169_napi[i]);
> + else
> + rtl8169_interrupt(pci_irq_vector(tp->pci_dev, i),
> + &tp->rtl8169_napi[i]);
> }
> }
> #endif
> @@ -5454,7 +5553,9 @@ static void rtl_shutdown(struct pci_dev *pdev)
>
> static void r8169_free_napi(struct rtl8169_private *tp)
> {
> - for (int i = 0; i < tp->irq_nvecs; i++)
> + int napi_num = min(tp->irq_nvecs, R8169_MAX_QUEUES);
> +
> + for (int i = 0; i < napi_num; i++)
> netif_napi_del(&tp->rtl8169_napi[i]);
>
> kfree(tp->rtl8169_napi);
> @@ -5508,10 +5609,16 @@ static const struct net_device_ops rtl_netdev_ops = {
>
> static void rtl_set_irq_mask(struct rtl8169_private *tp)
> {
> - tp->irq_mask = RxOK | RxErr | TxOK | TxErr | LinkChg;
> + if (tp->irq_nvecs > 1) {
> + tp->irq_mask = ISRIMR_LINKCHG | ISRIMR_TOK_Q0;
> + for (int i = 0; i < tp->num_rx_rings; i++)
> + tp->irq_mask |= ISRIMR_ROK_Q0 << i;
> + } else {
> + tp->irq_mask = RxOK | RxErr | TxOK | TxErr | LinkChg;
>
> - if (tp->mac_version <= RTL_GIGA_MAC_VER_06)
> - tp->irq_mask |= SYSErr | RxFIFOOver;
> + if (tp->mac_version <= RTL_GIGA_MAC_VER_06)
> + tp->irq_mask |= SYSErr | RxFIFOOver;
> + }
> }
>
> static int rtl_alloc_irq(struct rtl8169_private *tp)
> @@ -5796,10 +5903,64 @@ static bool rtl_aspm_is_safe(struct rtl8169_private *tp)
> return false;
> }
>
> +static int rtl8169_poll_msix_rx(struct napi_struct *napi, int budget)
> +{
> + struct net_device *dev = napi->dev;
> + struct rtl8169_private *tp;
> + int work_done = 0;
> + int message_id;
> +
> + tp = netdev_priv(dev);
> + message_id = napi - tp->rtl8169_napi;
> +
> + if (message_id < tp->num_rx_rings)
> + work_done += rtl_rx(dev, tp, &tp->rx_ring[message_id],
> + budget, napi);
> +
> + if (work_done < budget && napi_complete_done(napi, work_done))
> + rtl8169_enable_hw_interrupt_msix(tp, message_id);
> +
> + return work_done;
> +}
> +
> +static int rtl8169_poll_msix_tx(struct napi_struct *napi, int budget)
> +{
> + struct net_device *dev = napi->dev;
> + struct rtl8169_private *tp;
> +
> + tp = netdev_priv(dev);
> +
> + /* Currently r8169 only supports a single Tx ring.
> + * Therefore, we don't need a per-ring Tx processing loop here.
> + */
> + rtl_tx(dev, tp, budget);
> +
> + if (napi_complete_done(napi, 0))
> + rtl8169_enable_hw_interrupt_msix(tp, (int)(napi - tp->rtl8169_napi));
> +
> + return 0;
> +}
> +
> +/* RTL8127 MSI-X vector layout:
> + * Vectors 0 .. (RxQs - 1) : Rx Queues
> + * Vectors RxQs .. (RxQs + TxQs - 1) : Tx Queues
> + * NAPI is only allocated for data path
> + */
> static void r8169_init_napi(struct rtl8169_private *tp)
> {
> - for (int i = 0; i < tp->irq_nvecs; i++)
> - netif_napi_add(tp->dev, &tp->rtl8169_napi[i], rtl8169_poll);
> + int napi_num = min(tp->irq_nvecs, R8169_MAX_QUEUES);
> +
> + for (int i = 0; i < napi_num; i++) {
> + int (*poll_fn)(struct napi_struct *, int) = rtl8169_poll;
> +
> + if (tp->irq_nvecs > 1) {
> + if (i < R8169_MAX_RX_QUEUES)
> + poll_fn = rtl8169_poll_msix_rx;
> + else
> + poll_fn = rtl8169_poll_msix_tx;
> + }
> + netif_napi_add(tp->dev, &tp->rtl8169_napi[i], poll_fn);
> + }
> }
>
> static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH net-next v11 4/7] r8169: enable new interrupt mapping
2026-08-14 1:52 ` [PATCH net-next v11 4/7] r8169: enable " javen
@ 2026-08-14 22:54 ` Mohsin Bashir
2026-08-17 7:21 ` Javen
2026-08-17 23:38 ` Jakub Kicinski
1 sibling, 1 reply; 14+ messages in thread
From: Mohsin Bashir @ 2026-08-14 22:54 UTC (permalink / raw)
To: javen, hkallweit1, nic_swsd, andrew+netdev, davem, edumazet, kuba,
pabeni, horms
Cc: netdev, linux-kernel
On 8/13/26 6:52 PM, javen wrote:
> From: Javen Xu <javen_xu@realsil.com.cn>
>
> This patch enables new interrupt mapping for RTL8127 and add error pkts
> counter per ring.
>
> Signed-off-by: Javen Xu <javen_xu@realsil.com.cn>
> ---
> Changes in v2:
> - no changes
>
> Changes in v3:
> - no changes
>
> Changes in v4:
> - no changes
>
> Changes in v5:
> - no changes
>
> Changes in v6:
> - no changes
>
> Changes in v7:
> - no changes
>
> Changes in v8:
> - no changes
>
> Changes in v9:
> - no changes
>
> Changes in v10:
> - no changes
>
> Changes in v11:
> - add error pkts counter per ring
> ---
> drivers/net/ethernet/realtek/r8169_main.c | 80 +++++++++++++++++++----
> 1 file changed, 68 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
> index b30f0a31d7c7..aa72c42c374d 100644
> --- a/drivers/net/ethernet/realtek/r8169_main.c
> +++ b/drivers/net/ethernet/realtek/r8169_main.c
> @@ -29,6 +29,7 @@
> #include <linux/prefetch.h>
> #include <linux/ipv6.h>
> #include <linux/unaligned.h>
> +#include <linux/u64_stats_sync.h>
> #include <net/ip6_checksum.h>
> #include <net/netdev_queues.h>
> #include <net/phy/realtek_phy.h>
> @@ -754,6 +755,15 @@ struct rtl8169_rx_ring {
> dma_addr_t rx_desc_phy_addr[NUM_RX_DESC];
> dma_addr_t rx_phy_addr;
> struct page *rx_databuff[NUM_RX_DESC];
> +
> + struct {
> + u64 rx_errors;
> + u64 rx_dropped;
> + u64 rx_length_errors;
> + u64 rx_crc_errors;
> + u64 multicast;
> + struct u64_stats_sync syncp;
> + } stats;
> };
>
> struct rtl8169_private {
> @@ -3939,6 +3949,15 @@ DECLARE_RTL_COND(rtl_mac_ocp_e00e_cond)
> return r8168_mac_ocp_read(tp, 0xe00e) & BIT(13);
> }
>
> +static void rtl8169_hw_enable_vec_mapping(struct rtl8169_private *tp)
> +{
> + u8 tmp;
> +
> + tmp = RTL_R8(tp, INT_CFG0_8125);
> + tmp |= INT_CFG0_ENABLE_8125;
> + RTL_W8(tp, INT_CFG0_8125, tmp);
> +}
> +
> static void rtl_hw_start_8125_common(struct rtl8169_private *tp)
> {
> rtl_pcie_state_l2l3_disable(tp);
> @@ -3947,6 +3966,9 @@ static void rtl_hw_start_8125_common(struct rtl8169_private *tp)
> RTL_W32(tp, RSS_CTRL_8125, 0);
> RTL_W16(tp, Q_NUM_CTRL_8125, 0);
>
> + if (tp->irq_nvecs > 1)
> + rtl8169_hw_enable_vec_mapping(tp);
> +
> /* disable UPS */
> r8168_mac_ocp_modify(tp, 0xd40a, 0x0010, 0x0000);
>
> @@ -4347,7 +4369,7 @@ static int rtl8169_init_ring(struct rtl8169_private *tp)
>
> memset(tp->tx_skb, 0, sizeof(tp->tx_skb));
>
> - for (i = 0; i < tp->num_rx_rings; i++) {
> + for (int i = 0; i < tp->num_rx_rings; i++) {
This looks like an unrelated change. Looking the function body, this is
introducing a new bug on the cleanup path by changing the scope of i.
> struct rtl8169_rx_ring *ring = &tp->rx_ring[i];
>
> memset(ring->rx_databuff, 0, sizeof(ring->rx_databuff));
> @@ -4926,15 +4948,16 @@ static inline void rtl8169_rx_csum(struct sk_buff *skb,
> skb_checksum_none_assert(skb);
> }
>
> -static bool rtl8169_check_rx_desc_error(struct net_device *dev,
> - struct rtl8169_private *tp,
> +static bool rtl8169_check_rx_desc_error(struct rtl8169_rx_ring *ring,
> u32 status)
> {
> if (unlikely(status & RxRES)) {
> + u64_stats_update_begin(&ring->stats.syncp);
> if (status & (RxRWT | RxRUNT))
> - dev->stats.rx_length_errors++;
> + ring->stats.rx_length_errors++;
> if (status & RxCRC)
> - dev->stats.rx_crc_errors++;
> + ring->stats.rx_crc_errors++;
> + u64_stats_update_end(&ring->stats.syncp);
> return true;
> }
> return false;
> @@ -4965,11 +4988,13 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp,
> */
> dma_rmb();
>
> - if (rtl8169_check_rx_desc_error(dev, tp, status)) {
> + if (rtl8169_check_rx_desc_error(ring, status)) {
> if (net_ratelimit())
> netdev_warn(dev, "Rx ERROR. status = %08x\n",
> status);
> - dev->stats.rx_errors++;
> + u64_stats_update_begin(&ring->stats.syncp);
> + ring->stats.rx_errors++;
> + u64_stats_update_end(&ring->stats.syncp);
>
> if (!(dev->features & NETIF_F_RXALL))
> goto release_descriptor;
> @@ -4985,14 +5010,18 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp,
> * They are seen as a symptom of over-mtu sized frames.
> */
> if (unlikely(rtl8169_fragmented_frame(status))) {
> - dev->stats.rx_dropped++;
> - dev->stats.rx_length_errors++;
> + u64_stats_update_begin(&ring->stats.syncp);
> + ring->stats.rx_dropped++;
> + ring->stats.rx_length_errors++;
> + u64_stats_update_end(&ring->stats.syncp);
> goto release_descriptor;
> }
>
> skb = napi_alloc_skb(napi, pkt_size);
> if (unlikely(!skb)) {
> - dev->stats.rx_dropped++;
> + u64_stats_update_begin(&ring->stats.syncp);
> + ring->stats.rx_dropped++;
> + u64_stats_update_end(&ring->stats.syncp);
> goto release_descriptor;
> }
>
> @@ -5011,8 +5040,11 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp,
>
> rtl8169_rx_vlan_tag(desc, skb);
>
> - if (skb->pkt_type == PACKET_MULTICAST)
> - dev->stats.multicast++;
> + if (skb->pkt_type == PACKET_MULTICAST) {
> + u64_stats_update_begin(&ring->stats.syncp);
> + ring->stats.multicast++;
> + u64_stats_update_end(&ring->stats.syncp);
> + }
>
> napi_gro_receive(napi, skb);
>
> @@ -5428,6 +5460,27 @@ rtl8169_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
> netdev_stats_to_stats64(stats, &dev->stats);
> dev_fetch_sw_netstats(stats, dev->tstats);
>
> + for (int i = 0; i < tp->num_rx_rings; i++) {
> + u64 errors, dropped, length_errors, crc_errors, multicast;
> + struct rtl8169_rx_ring *ring = &tp->rx_ring[i];
> + unsigned int start;
> +
> + do {
> + start = u64_stats_fetch_begin(&ring->stats.syncp);
> + errors = ring->stats.rx_errors;
> + dropped = ring->stats.rx_dropped;
> + length_errors = ring->stats.rx_length_errors;
> + crc_errors = ring->stats.rx_crc_errors;
> + multicast = ring->stats.multicast;
> + } while (u64_stats_fetch_retry(&ring->stats.syncp, start));
> +
> + stats->rx_errors += errors;
> + stats->rx_dropped += dropped;
> + stats->rx_length_errors += length_errors;
> + stats->rx_crc_errors += crc_errors;
> + stats->multicast += multicast;
> + }
> +
> /*
> * Fetch additional counter values missing in stats collected by driver
> * from tally counters.
> @@ -6166,6 +6219,9 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
> if (!tp->rx_ring)
> return -ENOMEM;
>
> + for (int i = 0; i < tp->num_rx_rings; i++)
> + u64_stats_init(&tp->rx_ring[i].stats.syncp);
> +
> tp->rtl8169_napi = kcalloc(tp->irq_nvecs, sizeof(struct napi_struct),
> GFP_KERNEL);
> if (!tp->rtl8169_napi) {
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH net-next v11 5/7] r8169: add support and enable rss
2026-08-14 1:52 ` [PATCH net-next v11 5/7] r8169: add support and enable rss javen
@ 2026-08-14 23:00 ` Mohsin Bashir
0 siblings, 0 replies; 14+ messages in thread
From: Mohsin Bashir @ 2026-08-14 23:00 UTC (permalink / raw)
To: javen, hkallweit1, nic_swsd, andrew+netdev, davem, edumazet, kuba,
pabeni, horms
Cc: netdev, linux-kernel
On 8/13/26 6:52 PM, javen wrote:
> From: Javen Xu <javen_xu@realsil.com.cn>
>
> This patch adds support and enable rss for RTL8127.
>
> Signed-off-by: Javen Xu <javen_xu@realsil.com.cn>
> ---
> Changes in v2:
> - some changes moved from Patch 2/7
>
> Changes in v3:
> - add struct rtl8169_rss_data. Allocate it dynamically when needed.
> - define rss_key as an u32 array
> - replace some magic bit numbers in rtl8169_set_rss_hash_opt() and
> rtl8125_set_rx_q_num()
> - use union to combine different rx descriptor, refactor struct RxDesc
> - remove dead code from rtl8169_double_check_rss_support()
>
> Changes in v4:
> - rename macro definition, e.g R8127_MAX_IRQ to R8127_MAX_NUM_IRQVEC
> - change hw_supp_indir_tbl_entries type to unsigned int
> - change init_rx_desc_type type to enum
> - remove rtl_check_rss_support(), add helper function
> rtl_hw_support_rss()
> - remove hw_curr_isr_ver, use irq_nvecs to judge whether we should
> enable vector interrupt mapping, use tp->num_rx_ring to judge whether
> we should enable rss
> - remove function rtl8169_double_check_rss_support(), use
> rtl8169_set_rx_ring_num() to set num_rx_ring according to tp->irq_nvecs
>
> Changes in v5:
> - no changes
>
> Changes in v6:
> - change rss_queue_num type from u8 to unsigned int
> - fix rx desc clear in rtl8169_rx_clear() for different desc type
> - clamping num_rx_ring with rounddown_pow_of_two()
>
> Changes in v7:
> - remove unused macro
> - change unfixed type in rtl8169_store_reta
>
> Changes in v8:
> - refill desc->addr when rx_desc reset
> - rtl8169_set_channels fixed in patch 7/7
>
> Changes in v9:
> - remove rtl8169_set_desc_dma_addr, only set desc dma addr for
> RX_DESC_TYPE_RSS desc
>
> Changes in v10:
> - Change rss_key to u8 array and write rss_key_reg as u32 values.
> Use get_unaligned_le32() to keep behavior consistent on big-endian
> and little-endian
>
> Changes in v11:
> - fix compilation error by adding block in switch default case
> - fix concurrency bug on updating global dev->stats by using per-queue
> stat
> - fix packet drop logic to properlly handle fatal errors when rss is
> enable
> - use get_unaligned_le32() uniformly in rtl8169_store_reta()
> - fix coding style issues
> - add comment on pci_alloc_irq_vectors() call
> ---
> drivers/net/ethernet/realtek/r8169_main.c | 398 ++++++++++++++++++++--
> 1 file changed, 361 insertions(+), 37 deletions(-)
>
> diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
> index aa72c42c374d..1b4416d32231 100644
> --- a/drivers/net/ethernet/realtek/r8169_main.c
> +++ b/drivers/net/ethernet/realtek/r8169_main.c
> @@ -89,6 +89,19 @@
> #define R8169_MAX_RX_QUEUES 8
> #define R8169_DEFAULT_RX_QUEUES 1
> #define R8169_MAX_TX_QUEUES 1
> +#define R8127_MAX_NUM_IRQVEC 32
> +#define R8127_MIN_NUM_IRQVEC 30
> +#define R8169_IRQ_DEFAULT 1
> +#define RTL_RSS_KEY_SIZE 40
> +#define RSS_CPU_NUM_MASK GENMASK(18, 16)
> +#define RSS_HASH_MASK GENMASK(10, 8)
> +#define RTL_MAX_INDIRECTION_TABLE_ENTRIES 128
> +#define RXS_RSS_UDP BIT(27)
> +#define RXS_RSS_IPV4 BIT(28)
> +#define RXS_RSS_IPV6 BIT(29)
> +#define RXS_RSS_TCP BIT(30)
> +#define RXS_RSS_L3_TYPE_MASK (RXS_RSS_IPV4 | RXS_RSS_IPV6)
> +#define RXS_RSS_L4_TYPE_MASK (RXS_RSS_TCP | RXS_RSS_UDP)
>
> #define OCP_STD_PHY_BASE 0xa400
>
> @@ -491,6 +504,9 @@ enum rtl_register_content {
> RxRUNT = (1 << 20),
> RxCRC = (1 << 19),
>
> + RXRUNT_RSS = (1 << 21),
> + RXCRC_RSS = (1 << 20),
> +
> /* ChipCmdBits */
> StopReq = 0x80,
> CmdReset = 0x10,
> @@ -596,6 +612,20 @@ enum rtl_register_content {
> #define ISRIMR_LINKCHG BIT(29)
> #define ISRIMR_TOK_Q0 BIT(8)
> #define ISRIMR_ROK_Q0 BIT(0)
> +#define RTL_DESC_TYPE_CTRL 0xd8
> +#define RSS_KEY_REG 0x4600
> +#define RSS_INDIRECTION_TBL_REG 0x4700
> +#define RSS_CTRL_TCP_IPV4_SUPP BIT(0)
> +#define RTL_DESC_TYPE_RSS BIT(1)
> +#define RSS_CTRL_IPV4_SUPP BIT(1)
> +#define RSS_CTRL_TCP_IPV6_SUPP BIT(2)
> +#define RSS_CTRL_IPV6_SUPP BIT(3)
> +#define RSS_CTRL_IPV6_EXT_SUPP BIT(4)
> +#define RSS_CTRL_TCP_IPV6_EXT_SUPP BIT(5)
> +#define RX_RES_RSS BIT(22)
> +#define RX_RUNT_RSS BIT(21)
> +#define RX_CRC_RSS BIT(20)
> +#define RTL_RX_Q_NUM_MASK GENMASK(4, 2)
> };
>
> enum rtl_desc_bit {
> @@ -653,6 +683,11 @@ enum rtl_rx_desc_bit {
> #define RxProtoIP (PID1 | PID0)
> #define RxProtoMask RxProtoIP
>
> +#define RX_UDPT_DESC_RSS BIT(19)
> +#define RX_TCPT_DESC_RSS BIT(18)
> +#define RX_UDPF_DESC_RSS BIT(16) /* UDP/IP checksum failed */
> +#define RX_TCPF_DESC_RSS BIT(15) /* TCP/IP checksum failed */
> +
> IPFail = (1 << 16), /* IP checksum failed */
> UDPFail = (1 << 15), /* UDP/IP checksum failed */
> TCPFail = (1 << 14), /* TCP/IP checksum failed */
> @@ -674,9 +709,27 @@ struct TxDesc {
> };
>
> struct RxDesc {
> - __le32 opts1;
> - __le32 opts2;
> - __le64 addr;
> + union {
> + /* RX_DESC_TYPE_DEFAULT */
> + struct {
> + __le32 opts1;
> + __le32 opts2;
> + __le64 addr;
> + };
> +
> + /* RX_DESC_TYPE_RSS */
> + struct {
> + union {
> + __le64 rss_addr;
> + struct {
> + __le32 rss_info;
> + __le32 rss_result;
> + } rss_dword;
> + };
> + __le32 rss_opts2;
> + __le32 rss_opts1;
> + };
> + };
> };
>
> struct ring_info {
> @@ -748,6 +801,11 @@ enum rtl_dash_type {
> RTL_DASH_25_BP,
> };
>
> +enum rx_desc_type {
> + RX_DESC_TYPE_DEFAULT,
> + RX_DESC_TYPE_RSS,
> +};
> +
> struct rtl8169_rx_ring {
> u32 cur_rx;
> u32 dirty_rx;
> @@ -766,6 +824,12 @@ struct rtl8169_rx_ring {
> } stats;
> };
>
> +struct rtl8169_rss_data {
> + u8 rss_key[RTL_RSS_KEY_SIZE];
> + u8 rss_indir_tbl[RTL_MAX_INDIRECTION_TABLE_ENTRIES];
> + unsigned int hw_supp_indir_tbl_entries;
> +};
> +
> struct rtl8169_private {
> void __iomem *mmio_addr; /* memory map physical address */
> struct pci_dev *pci_dev;
> @@ -785,7 +849,9 @@ struct rtl8169_private {
> u16 tx_lpi_timer;
> u32 irq_mask;
> unsigned int hw_supp_num_rx_queues;
> + struct rtl8169_rss_data *rss_data;
> unsigned int irq_nvecs;
> + enum rx_desc_type init_rx_desc_type;
> struct clk *clk;
>
> struct {
> @@ -1615,6 +1681,11 @@ static bool rtl_dash_is_enabled(struct rtl8169_private *tp)
> }
> }
>
> +static bool rtl_hw_support_rss(struct rtl8169_private *tp)
> +{
> + return tp->mac_version == RTL_GIGA_MAC_VER_80;
> +}
> +
> static enum rtl_dash_type rtl_get_dash_type(struct rtl8169_private *tp)
> {
> switch (tp->mac_version) {
> @@ -1916,9 +1987,20 @@ static inline u32 rtl8169_tx_vlan_tag(struct sk_buff *skb)
> TxVlanTag | swab16(skb_vlan_tag_get(skb)) : 0x00;
> }
>
> -static void rtl8169_rx_vlan_tag(struct RxDesc *desc, struct sk_buff *skb)
> +static void rtl8169_rx_vlan_tag(struct rtl8169_private *tp,
> + struct RxDesc *desc,
> + struct sk_buff *skb)
> {
> - u32 opts2 = le32_to_cpu(desc->opts2);
> + u32 opts2;
> +
> + switch (tp->init_rx_desc_type) {
> + case RX_DESC_TYPE_RSS:
> + opts2 = le32_to_cpu(desc->rss_opts2);
> + break;
> + default:
> + opts2 = le32_to_cpu(desc->opts2);
> + break;
> + }
>
> if (opts2 & RxVlanTag)
> __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), swab16(opts2 & 0xffff));
> @@ -2746,17 +2828,27 @@ static void rtl_hw_reset(struct rtl8169_private *tp)
> rtl_loop_wait_low(tp, &rtl_chipcmd_cond, 100, 100);
> }
>
> +static void rtl8169_init_rss(struct rtl8169_private *tp)
> +{
> + for (int i = 0; i < tp->rss_data->hw_supp_indir_tbl_entries; i++)
> + tp->rss_data->rss_indir_tbl[i] = ethtool_rxfh_indir_default(i, tp->num_rx_rings);
> +
> + netdev_rss_key_fill(tp->rss_data->rss_key, RTL_RSS_KEY_SIZE);
> +}
> +
> static void rtl_setup_rx_params(struct rtl8169_private *tp)
> {
> tp->num_rx_rings = 1;
> switch (tp->mac_version) {
> case RTL_GIGA_MAC_VER_80:
> tp->hw_supp_num_rx_queues = R8169_MAX_RX_QUEUES;
> + tp->rss_data->hw_supp_indir_tbl_entries = RTL_MAX_INDIRECTION_TABLE_ENTRIES;
> break;
> default:
> tp->hw_supp_num_rx_queues = R8169_DEFAULT_RX_QUEUES;
> break;
> }
> + tp->init_rx_desc_type = RX_DESC_TYPE_DEFAULT;
> }
>
> static void rtl_request_firmware(struct rtl8169_private *tp)
> @@ -2881,6 +2973,56 @@ static void rtl_set_rx_max_size(struct rtl8169_private *tp)
> RTL_W16(tp, RxMaxSize, R8169_RX_BUF_SIZE + 1);
> }
>
> +static void rtl8169_store_rss_key(struct rtl8169_private *tp)
> +{
> + u8 *rss_key = tp->rss_data->rss_key;
> + const u16 rss_key_reg = RSS_KEY_REG;
> +
> + /* Write redirection table to HW */
> + for (int i = 0; i < RTL_RSS_KEY_SIZE; i += sizeof(u32))
> + RTL_W32(tp, rss_key_reg + i, get_unaligned_le32(rss_key + i));
> +}
> +
> +static void rtl8169_store_reta(struct rtl8169_private *tp)
> +{
> + u8 *indir_tbl = tp->rss_data->rss_indir_tbl;
> + unsigned int i;
> +
> + /* Write redirection table to HW */
> + for (i = 0; i < tp->rss_data->hw_supp_indir_tbl_entries; i += 4) {
> + u32 reta = get_unaligned_le32(&indir_tbl[i]);
> +
> + RTL_W32(tp, RSS_INDIRECTION_TBL_REG + i, reta);
> + }
> +}
> +
> +static void rtl8169_set_rss_hash_opt(struct rtl8169_private *tp)
> +{
> + u32 rss_ctrl;
> +
> + rss_ctrl = FIELD_PREP(RSS_CPU_NUM_MASK, ilog2(tp->num_rx_rings));
> +
> + /* Perform hash on these packet types */
> + rss_ctrl |= RSS_CTRL_TCP_IPV4_SUPP |
> + RSS_CTRL_IPV4_SUPP |
> + RSS_CTRL_IPV6_SUPP |
> + RSS_CTRL_IPV6_EXT_SUPP |
> + RSS_CTRL_TCP_IPV6_SUPP |
> + RSS_CTRL_TCP_IPV6_EXT_SUPP;
> +
No support for UDP? If it is intentional, maybe drop a comment?
> + rss_ctrl |= FIELD_PREP(RSS_HASH_MASK,
> + ilog2(tp->rss_data->hw_supp_indir_tbl_entries));
> +
> + RTL_W32(tp, RSS_CTRL_8125, rss_ctrl);
> +}
> +
> +static void rtl_set_rss_config(struct rtl8169_private *tp)
> +{
> + rtl8169_set_rss_hash_opt(tp);
> + rtl8169_store_reta(tp);
> + rtl8169_store_rss_key(tp);
> +}
> +
> static void rtl_set_rx_tx_desc_registers(struct rtl8169_private *tp)
> {
> struct rtl8169_rx_ring *ring = &tp->rx_ring[0];
> @@ -3949,6 +4091,18 @@ DECLARE_RTL_COND(rtl_mac_ocp_e00e_cond)
> return r8168_mac_ocp_read(tp, 0xe00e) & BIT(13);
> }
>
> +static void rtl8125_set_rx_q_num(struct rtl8169_private *tp)
> +{
> + u16 rx_q_num;
> + u16 q_ctrl;
> +
> + rx_q_num = ilog2(tp->num_rx_rings);
> + q_ctrl = RTL_R16(tp, Q_NUM_CTRL_8125);
> + q_ctrl &= ~RTL_RX_Q_NUM_MASK;
> + q_ctrl |= FIELD_PREP(RTL_RX_Q_NUM_MASK, rx_q_num);
> + RTL_W16(tp, Q_NUM_CTRL_8125, q_ctrl);
> +}
> +
> static void rtl8169_hw_enable_vec_mapping(struct rtl8169_private *tp)
> {
> u8 tmp;
> @@ -3988,6 +4142,13 @@ static void rtl_hw_start_8125_common(struct rtl8169_private *tp)
> tp->mac_version == RTL_GIGA_MAC_VER_80)
> RTL_W8(tp, 0xD8, RTL_R8(tp, 0xD8) & ~0x02);
>
> + /* enable rx descriptor type v4 and set queue num for rss */
> + if (tp->num_rx_rings > 1) {
> + rtl8125_set_rx_q_num(tp);
> + RTL_W8(tp, RTL_DESC_TYPE_CTRL,
> + RTL_R8(tp, RTL_DESC_TYPE_CTRL) | RTL_DESC_TYPE_RSS);
> + }
> +
> if (tp->mac_version == RTL_GIGA_MAC_VER_80)
> r8168_mac_ocp_modify(tp, 0xe614, 0x0f00, 0x0f00);
> else if (tp->mac_version == RTL_GIGA_MAC_VER_70)
> @@ -4224,6 +4385,12 @@ static void rtl_hw_start(struct rtl8169_private *tp)
> rtl_hw_aspm_clkreq_enable(tp, true);
> rtl_set_rx_max_size(tp);
> rtl_set_rx_tx_desc_registers(tp);
> + if (rtl_is_8125(tp)) {
> + if (tp->num_rx_rings > 1)
> + rtl_set_rss_config(tp);
> + else
> + RTL_W32(tp, RSS_CTRL_8125, 0x00);
> + }
> rtl_lock_config_regs(tp);
>
> rtl_jumbo_config(tp);
> @@ -4251,14 +4418,26 @@ static int rtl8169_change_mtu(struct net_device *dev, int new_mtu)
> return 0;
> }
>
> -static void rtl8169_mark_to_asic(struct RxDesc *desc)
> +static void rtl8169_mark_to_asic(struct rtl8169_private *tp, struct RxDesc *desc)
> {
> - u32 eor = le32_to_cpu(desc->opts1) & RingEnd;
> + u32 eor;
>
> - desc->opts2 = 0;
> - /* Force memory writes to complete before releasing descriptor */
> - dma_wmb();
> - WRITE_ONCE(desc->opts1, cpu_to_le32(DescOwn | eor | R8169_RX_BUF_SIZE));
> + switch (tp->init_rx_desc_type) {
> + case RX_DESC_TYPE_RSS:
> + eor = le32_to_cpu(desc->rss_opts1) & RingEnd;
> + desc->rss_opts2 = cpu_to_le32(0);
> + /* Force memory writes to complete before releasing descriptor */
> + dma_wmb();
> + WRITE_ONCE(desc->rss_opts1, cpu_to_le32(DescOwn | eor | R8169_RX_BUF_SIZE));
> + break;
> + default:
> + eor = le32_to_cpu(desc->opts1) & RingEnd;
> + desc->opts2 = cpu_to_le32(0);
> + /* Force memory writes to complete before releasing descriptor */
> + dma_wmb();
> + WRITE_ONCE(desc->opts1, cpu_to_le32(DescOwn | eor | R8169_RX_BUF_SIZE));
> + break;
> + }
> }
>
> static struct page *rtl8169_alloc_rx_data(struct rtl8169_private *tp,
> @@ -4281,9 +4460,12 @@ static struct page *rtl8169_alloc_rx_data(struct rtl8169_private *tp,
> return NULL;
> }
>
> - desc->addr = cpu_to_le64(mapping);
> ring->rx_desc_phy_addr[index] = mapping;
> - rtl8169_mark_to_asic(desc);
> + if (tp->init_rx_desc_type == RX_DESC_TYPE_RSS)
> + desc->rss_addr = cpu_to_le64(mapping);
> + else
> + desc->addr = cpu_to_le64(mapping);
> + rtl8169_mark_to_asic(tp, desc);
>
> return data;
> }
> @@ -4300,8 +4482,25 @@ static void rtl8169_rx_clear(struct rtl8169_private *tp,
> __free_pages(ring->rx_databuff[i], get_order(R8169_RX_BUF_SIZE));
> ring->rx_databuff[i] = NULL;
> ring->rx_desc_phy_addr[i] = 0;
> - ring->rx_desc_array[i].addr = 0;
> - ring->rx_desc_array[i].opts1 = 0;
> + if (tp->init_rx_desc_type == RX_DESC_TYPE_RSS) {
> + ring->rx_desc_array[i].rss_addr = 0;
> + ring->rx_desc_array[i].rss_opts1 = 0;
> + } else {
> + ring->rx_desc_array[i].addr = 0;
> + ring->rx_desc_array[i].opts1 = 0;
> + }
> + }
> +}
> +
> +static void rtl8169_mark_as_last_descriptor(struct rtl8169_private *tp, struct RxDesc *desc)
> +{
> + switch (tp->init_rx_desc_type) {
> + case RX_DESC_TYPE_RSS:
> + desc->rss_opts1 |= cpu_to_le32(RingEnd);
> + break;
> + default:
> + desc->opts1 |= cpu_to_le32(RingEnd);
> + break;
> }
> }
>
> @@ -4321,7 +4520,7 @@ static int rtl8169_rx_fill(struct rtl8169_private *tp, struct rtl8169_rx_ring *r
> }
>
> /* mark as last descriptor in the ring */
> - ring->rx_desc_array[NUM_RX_DESC - 1].opts1 |= cpu_to_le32(RingEnd);
> + rtl8169_mark_as_last_descriptor(tp, &ring->rx_desc_array[NUM_RX_DESC - 1]);
>
> return 0;
> }
> @@ -4480,8 +4679,13 @@ static void rtl8169_rx_desc_reset(struct rtl8169_private *tp)
> for (int i = 0; i < tp->num_rx_rings; i++) {
> struct rtl8169_rx_ring *ring = &tp->rx_ring[i];
>
> - for (int j = 0; j < NUM_RX_DESC; j++)
> - rtl8169_mark_to_asic(ring->rx_desc_array + j);
> + for (int j = 0; j < NUM_RX_DESC; j++) {
> + dma_addr_t phy_addr = ring->rx_desc_phy_addr[j];
> +
> + if (tp->init_rx_desc_type == RX_DESC_TYPE_RSS)
> + ring->rx_desc_array[j].rss_addr = cpu_to_le64(phy_addr);
> + rtl8169_mark_to_asic(tp, ring->rx_desc_array + j);
> + }
> }
> }
>
> @@ -4937,28 +5141,91 @@ static inline int rtl8169_fragmented_frame(u32 status)
> return (status & (FirstFrag | LastFrag)) != (FirstFrag | LastFrag);
> }
>
> -static inline void rtl8169_rx_csum(struct sk_buff *skb,
> +static inline void rtl8169_rx_hash(struct rtl8169_private *tp,
> + struct RxDesc *desc,
> + struct sk_buff *skb)
> +{
> + u32 rss_header_info;
> + u32 hash_val;
> +
> + if (!(tp->dev->features & NETIF_F_RXHASH))
> + return;
> +
> + rss_header_info = le32_to_cpu(desc->rss_dword.rss_info);
> +
> + if (!(rss_header_info & RXS_RSS_L3_TYPE_MASK))
> + return;
> +
> + hash_val = le32_to_cpu(desc->rss_dword.rss_result);
> +
> + skb_set_hash(skb, hash_val,
> + (RXS_RSS_L4_TYPE_MASK & rss_header_info) ?
> + PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
> +}
> +
> +static inline void rtl8169_rx_csum(struct rtl8169_private *tp,
> + struct sk_buff *skb,
> u32 opts1)
> {
> - u32 status = opts1 & (RxProtoMask | RxCSFailMask);
> + bool csum_ok = false;
> +
> + switch (tp->init_rx_desc_type) {
> + case RX_DESC_TYPE_RSS:
> + if (((opts1 & RX_TCPT_DESC_RSS) && !(opts1 & RX_TCPF_DESC_RSS)) ||
> + ((opts1 & RX_UDPT_DESC_RSS) && !(opts1 & RX_UDPF_DESC_RSS)))
> + csum_ok = true;
> + break;
> + default: {
> + u32 status = opts1 & (RxProtoMask | RxCSFailMask);
> +
> + if (status == RxProtoTCP || status == RxProtoUDP)
> + csum_ok = true;
> + break;
> + }
> + }
>
> - if (status == RxProtoTCP || status == RxProtoUDP)
> + if (csum_ok)
> skb->ip_summed = CHECKSUM_UNNECESSARY;
> else
> skb_checksum_none_assert(skb);
> }
>
> +static __le32 rtl8169_rx_desc_opts1(struct rtl8169_private *tp, struct RxDesc *desc)
> +{
> + switch (tp->init_rx_desc_type) {
> + case RX_DESC_TYPE_RSS:
> + return READ_ONCE(desc->rss_opts1);
> + default:
> + return READ_ONCE(desc->opts1);
> + }
> +}
> +
> static bool rtl8169_check_rx_desc_error(struct rtl8169_rx_ring *ring,
> + struct rtl8169_private *tp,
> u32 status)
> {
> - if (unlikely(status & RxRES)) {
> - u64_stats_update_begin(&ring->stats.syncp);
> - if (status & (RxRWT | RxRUNT))
> - ring->stats.rx_length_errors++;
> - if (status & RxCRC)
> - ring->stats.rx_crc_errors++;
> - u64_stats_update_end(&ring->stats.syncp);
> - return true;
> + switch (tp->init_rx_desc_type) {
> + case RX_DESC_TYPE_RSS:
> + if (unlikely(status & RX_RES_RSS)) {
> + u64_stats_update_begin(&ring->stats.syncp);
> + if (status & RX_RUNT_RSS)
> + ring->stats.rx_length_errors++;
> + if (status & RX_CRC_RSS)
> + ring->stats.rx_crc_errors++;
> + u64_stats_update_end(&ring->stats.syncp);
> + return true;
> + }
> + break;
> + default:
> + if (unlikely(status & RxRES)) {
> + u64_stats_update_begin(&ring->stats.syncp);
> + if (status & (RxRWT | RxRUNT))
> + ring->stats.rx_length_errors++;
> + if (status & RxCRC)
> + ring->stats.rx_crc_errors++;
> + u64_stats_update_end(&ring->stats.syncp);
> + return true;
> + }
> }
> return false;
> }
> @@ -4978,7 +5245,7 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp,
> dma_addr_t addr;
> u32 status;
>
> - status = le32_to_cpu(READ_ONCE(desc->opts1));
> + status = le32_to_cpu(rtl8169_rx_desc_opts1(tp, desc));
> if (status & DescOwn)
> break;
>
> @@ -4988,7 +5255,7 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp,
> */
> dma_rmb();
>
> - if (rtl8169_check_rx_desc_error(ring, status)) {
> + if (rtl8169_check_rx_desc_error(ring, tp, status)) {
> if (net_ratelimit())
> netdev_warn(dev, "Rx ERROR. status = %08x\n",
> status);
> @@ -4998,8 +5265,14 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp,
>
> if (!(dev->features & NETIF_F_RXALL))
> goto release_descriptor;
> - else if (status & RxRWT || !(status & (RxRUNT | RxCRC)))
> - goto release_descriptor;
> +
> + if (tp->init_rx_desc_type == RX_DESC_TYPE_DEFAULT) {
> + if (status & RxRWT || !(status & (RxRUNT | RxCRC)))
> + goto release_descriptor;
> + } else {
> + if (!(status & (RXRUNT_RSS | RXCRC_RSS)))
> + goto release_descriptor;
> + }
> }
>
> pkt_size = status & GENMASK(13, 0);
> @@ -5035,10 +5308,12 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp,
> skb->len = pkt_size;
> dma_sync_single_for_device(d, addr, pkt_size, DMA_FROM_DEVICE);
>
> - rtl8169_rx_csum(skb, status);
> + if (tp->num_rx_rings > 1)
> + rtl8169_rx_hash(tp, desc, skb);
> + rtl8169_rx_csum(tp, skb, status);
> skb->protocol = eth_type_trans(skb, dev);
>
> - rtl8169_rx_vlan_tag(desc, skb);
> + rtl8169_rx_vlan_tag(tp, desc, skb);
>
> if (skb->pkt_type == PACKET_MULTICAST) {
> u64_stats_update_begin(&ring->stats.syncp);
> @@ -5050,7 +5325,9 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp,
>
> dev_sw_netstats_rx_add(dev, pkt_size);
> release_descriptor:
> - rtl8169_mark_to_asic(desc);
> + if (tp->init_rx_desc_type == RX_DESC_TYPE_RSS)
> + desc->rss_addr = cpu_to_le64(ring->rx_desc_phy_addr[entry]);
> + rtl8169_mark_to_asic(tp, desc);
> }
>
> return count;
> @@ -5674,6 +5951,32 @@ static void rtl_set_irq_mask(struct rtl8169_private *tp)
> }
> }
>
> +static int get_max_irq_nvecs(struct rtl8169_private *tp)
> +{
> + if (tp->mac_version == RTL_GIGA_MAC_VER_80)
> + return R8127_MAX_NUM_IRQVEC;
> + return R8169_IRQ_DEFAULT;
> +}
> +
> +static int get_min_irq_nvecs(struct rtl8169_private *tp)
> +{
> + if (tp->mac_version == RTL_GIGA_MAC_VER_80)
> + return R8127_MIN_NUM_IRQVEC;
> + return R8169_IRQ_DEFAULT;
> +}
> +
> +static void rtl8169_set_rx_ring_num(struct rtl8169_private *tp)
> +{
> + if (tp->irq_nvecs >= get_min_irq_nvecs(tp)) {
> + unsigned int rss_queue_num = netif_get_num_default_rss_queues();
> +
> + tp->num_rx_rings = rounddown_pow_of_two(min(rss_queue_num,
> + tp->hw_supp_num_rx_queues));
> + if (tp->num_rx_rings >= 2)
> + tp->init_rx_desc_type = RX_DESC_TYPE_RSS;
> + }
> +}
> +
> static int rtl_alloc_irq(struct rtl8169_private *tp)
> {
> struct pci_dev *pdev = tp->pci_dev;
> @@ -5694,7 +5997,11 @@ static int rtl_alloc_irq(struct rtl8169_private *tp)
> break;
> }
>
> - nvecs = pci_alloc_irq_vectors(pdev, 1, 1, flags);
> + nvecs = pci_alloc_irq_vectors(pdev, get_min_irq_nvecs(tp),
> + get_max_irq_nvecs(tp), flags);
> +
> + if (nvecs < 0)
> + nvecs = pci_alloc_irq_vectors(pdev, 1, 1, flags);
>
> if (nvecs < 0)
> return nvecs;
> @@ -6109,6 +6416,13 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
> tp->dash_type = rtl_get_dash_type(tp);
> tp->dash_enabled = rtl_dash_is_enabled(tp);
>
> + if (rtl_hw_support_rss(tp)) {
> + tp->rss_data = devm_kzalloc(&pdev->dev, sizeof(*tp->rss_data),
> + GFP_KERNEL);
> + if (!tp->rss_data)
> + return -ENOMEM;
> + }
> +
> tp->cp_cmd = RTL_R16(tp, CPlusCmd) & CPCMD_MASK;
>
> if (sizeof(dma_addr_t) > 4 && tp->mac_version >= RTL_GIGA_MAC_VER_18 &&
> @@ -6129,6 +6443,11 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
> if (rc < 0)
> return dev_err_probe(&pdev->dev, rc, "Can't allocate interrupt\n");
>
> + rtl8169_set_rx_ring_num(tp);
> +
> + if (rtl_hw_support_rss(tp))
> + rtl8169_init_rss(tp);
> +
> INIT_WORK(&tp->wk.work, rtl_task);
> disable_work(&tp->wk.work);
>
> @@ -6141,6 +6460,11 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
> dev->vlan_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO;
> dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
>
> + if (rtl_hw_support_rss(tp) && tp->num_rx_rings > 1) {
> + dev->hw_features |= NETIF_F_RXHASH;
> + dev->features |= NETIF_F_RXHASH;
> + }
> +
> /*
> * Pretend we are using VLANs; This bypasses a nasty bug where
> * Interrupts stop flowing on high load on 8110SCd controllers.
^ permalink raw reply [flat|nested] 14+ messages in thread
* RE: [PATCH net-next v11 3/7] r8169: add support for new interrupt mapping
2026-08-14 22:45 ` Mohsin Bashir
@ 2026-08-17 7:21 ` Javen
0 siblings, 0 replies; 14+ messages in thread
From: Javen @ 2026-08-17 7:21 UTC (permalink / raw)
To: Mohsin Bashir, hkallweit1@gmail.com, nic_swsd@realtek.com,
andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com,
kuba@kernel.org, pabeni@redhat.com, horms@kernel.org
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org
>
>On 8/13/26 6:51 PM, javen wrote:
>> From: Javen Xu <javen_xu@realsil.com.cn>
>>
>> To support RSS, the number of hardware interrupt bits should match the
>> interrupt of software. So we add support for new interrupt mapping here.
>> ISR_VEC_MAP_REG is the hardware register to indicate interrupt status.
>> IMR_SET_VEC_MAP_REG is interrupt mask which is set to enable irq.
>>
>> Signed-off-by: Javen Xu <javen_xu@realsil.com.cn>
>> ---
>> Changes in v2:
>> - no changes
>>
>> Changes in v3:
>> - init index in napi_struct and get message_id from index
>> - move rtl8169_disable_hw_interrupt_msix directly before the call to
>> napi_schedule()
>> - change the condition in rtl8169_request_irq when RTL_VEC_MAP_ENABLE
>> enabled, use rtl8169_interrupt_msix
>>
>> Changes in v4:
>> - remove flag tp->feature, replace tp->features & RTL_VEC_MAP_ENABLE
>> with tp->irq_nvecs > 1, they are equivalent.
>> - follow reverse xmas tree, in rtl8169_interrupt_msix(),
>> rtl8169_poll_msix_rx(), rtl8169_poll_msix_tx(),
>> rtl8169_poll_msix_other()
>> - use napi->index in rtl8169_poll_msix_other()
>> - add a comment to describe RTL8127 MSI-X vector layout
>> - simplify r8169_init_napi()
>>
>> Changes in v5:
>> - replace magic number in rtl8169_poll_msix_tx()
>>
>> Changes in v6:
>> - when irq_nvecs <= 1, use register IntrMask_8125, else using vec map
>> - fix irq sequence in rtl8169_interrupt_msix(), disable interrupts
>> before clean it
>> - remove dead code in rtl8169_poll_msix_tx()
>>
>> Changes in v7:
>> - remove recheck_desc_ownbit
>> - change return value of rtl_tx
>> - remove message_id which only used once
>>
>> Changes in v8:
>> - fix rtl8169_netpoll()
>> - remove tx_done
>>
>> Changes in v9:
>> - change the way of getting message_id of napi
>>
>> Changes in v10:
>> - no changes
>>
>> Changes in v11:
>> - add comment on rtl8169_poll_msix_tx, only use 1 tx
>> - remove napi for other. Separate napi only for datapath, control path
>> like linkchg is handled in interrupt function, which will not call
>> napi any more.
>> ---
>> drivers/net/ethernet/realtek/r8169_main.c | 213 +++++++++++++++++++---
>> 1 file changed, 187 insertions(+), 26 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/realtek/r8169_main.c
>> b/drivers/net/ethernet/realtek/r8169_main.c
>> index 9311a0cab4eb..b30f0a31d7c7 100644
>> --- a/drivers/net/ethernet/realtek/r8169_main.c
>> +++ b/drivers/net/ethernet/realtek/r8169_main.c
>> @@ -84,6 +84,7 @@
>> #define R8169_RX_RING_BYTES ((NUM_RX_DESC + 1) * sizeof(struct
>RxDesc))
>> #define R8169_TX_STOP_THRS (MAX_SKB_FRAGS + 1)
>> #define R8169_TX_START_THRS (2 * R8169_TX_STOP_THRS)
>> +#define R8169_MAX_QUEUES 16
>> #define R8169_MAX_RX_QUEUES 8
>> #define R8169_DEFAULT_RX_QUEUES 1
>> #define R8169_MAX_TX_QUEUES 1
>> @@ -455,8 +456,12 @@ enum rtl8125_registers {
>> RSS_CTRL_8125 = 0x4500,
>> Q_NUM_CTRL_8125 = 0x4800,
>> EEE_TXIDLE_TIMER_8125 = 0x6048,
>> + IMR_CLEAR_VEC_MAP_REG = 0x0d00,
>> + ISR_VEC_MAP_REG = 0x0d04,
>> + IMR_SET_VEC_MAP_REG = 0x0d0c,
>> };
>>
>> +#define MSIX_ID_VEC_MAP_LINKCHG 29
>> #define LEDSEL_MASK_8125 0x23f
>>
>> #define RX_VLAN_INNER_8125 BIT(22)
>> @@ -587,6 +592,9 @@ enum rtl_register_content {
>>
>> /* magic enable v2 */
>> MagicPacket_v2 = (1 << 16), /* Wake up when receives a Magic Packet
>*/
>> +#define ISRIMR_LINKCHG BIT(29)
>> +#define ISRIMR_TOK_Q0 BIT(8)
>> +#define ISRIMR_ROK_Q0 BIT(0)
>> };
>>
>> enum rtl_desc_bit {
>> @@ -1663,26 +1671,38 @@ static u32 rtl_get_events(struct
>> rtl8169_private *tp)
>>
>> static void rtl_ack_events(struct rtl8169_private *tp, u32 bits)
>> {
>> - if (rtl_is_8125(tp))
>> - RTL_W32(tp, IntrStatus_8125, bits);
>> - else
>> + if (rtl_is_8125(tp)) {
>> + if (tp->irq_nvecs > 1)
>> + RTL_W32(tp, ISR_VEC_MAP_REG, bits);
>> + else
>> + RTL_W32(tp, IntrStatus_8125, bits);
>> + } else {
>> RTL_W16(tp, IntrStatus, bits);
>> + }
>> }
>>
>> static void rtl_irq_disable(struct rtl8169_private *tp)
>> {
>> - if (rtl_is_8125(tp))
>> - RTL_W32(tp, IntrMask_8125, 0);
>> - else
>> + if (rtl_is_8125(tp)) {
>> + if (tp->irq_nvecs > 1)
>> + RTL_W32(tp, IMR_CLEAR_VEC_MAP_REG, 0xffffffff);
>> + else
>> + RTL_W32(tp, IntrMask_8125, 0);
>> + } else {
>> RTL_W16(tp, IntrMask, 0);
>> + }
>> }
>>
>> static void rtl_irq_enable(struct rtl8169_private *tp)
>> {
>> - if (rtl_is_8125(tp))
>> - RTL_W32(tp, IntrMask_8125, tp->irq_mask);
>> - else
>> + if (rtl_is_8125(tp)) {
>> + if (tp->irq_nvecs > 1)
>> + RTL_W32(tp, IMR_SET_VEC_MAP_REG, tp->irq_mask);
>> + else
>> + RTL_W32(tp, IntrMask_8125, tp->irq_mask);
>> + } else {
>> RTL_W16(tp, IntrMask, tp->irq_mask);
>> + }
>> }
>>
>> static void rtl8169_irq_mask_and_ack(struct rtl8169_private *tp) @@
>> -4382,13 +4402,17 @@ static void rtl8169_tx_clear(struct
>> rtl8169_private *tp)
>>
>> static void rtl8169_napi_disable(struct rtl8169_private *tp)
>> {
>> - for (int i = 0; i < tp->irq_nvecs; i++)
>> + int napi_num = min(tp->irq_nvecs, R8169_MAX_QUEUES);
>> +
>> + for (int i = 0; i < napi_num; i++)
>> napi_disable(&tp->rtl8169_napi[i]);
>> }
>>
>> static void rtl8169_napi_enable(struct rtl8169_private *tp)
>> {
>> - for (int i = 0; i < tp->irq_nvecs; i++)
>> + int napi_num = min(tp->irq_nvecs, R8169_MAX_QUEUES);
>> +
>> + for (int i = 0; i < napi_num; i++)
>> napi_enable(&tp->rtl8169_napi[i]);
>> }
>>
>> @@ -5030,13 +5054,66 @@ static irqreturn_t rtl8169_interrupt(int irq, void
>*dev_instance)
>> return IRQ_HANDLED;
>> }
>>
>> +static void rtl8169_free_one_irq(struct rtl8169_private *tp, int i) {
>> + if (tp->irq_nvecs > 1) {
>> + if (i < R8169_MAX_QUEUES)
>> + pci_free_irq(tp->pci_dev, i, &tp->rtl8169_napi[i]);
>> + else if (i == MSIX_ID_VEC_MAP_LINKCHG)
>> + pci_free_irq(tp->pci_dev, i, tp);
>> + } else {
>> + pci_free_irq(tp->pci_dev, i, &tp->rtl8169_napi[i]);
>> + }
>> +}
>> +
>> static void rtl8169_free_irq(struct rtl8169_private *tp)
>> {
>> - for (int i = 0; i < tp->irq_nvecs; i++) {
>> - struct napi_struct *napi = &tp->rtl8169_napi[i];
>> + for (int i = 0; i < tp->irq_nvecs; i++)
>> + rtl8169_free_one_irq(tp, i); }
>>
>> - pci_free_irq(tp->pci_dev, i, napi);
>> - }
>> +static void rtl8169_disable_hw_interrupt_msix(struct rtl8169_private *tp,
>> + int message_id) {
>> + RTL_W32(tp, IMR_CLEAR_VEC_MAP_REG, BIT(message_id)); }
>> +
>> +static void rtl8169_clear_hw_isr(struct rtl8169_private *tp, int
>> +message_id) {
>> + RTL_W32(tp, ISR_VEC_MAP_REG, BIT(message_id)); }
>> +
>> +static void rtl8169_enable_hw_interrupt_msix(struct rtl8169_private *tp,
>> + int message_id) {
>> + RTL_W32(tp, IMR_SET_VEC_MAP_REG, BIT(message_id)); }
>> +
>> +static irqreturn_t rtl8169_interrupt_msix(int irq, void
>> +*dev_instance) {
>> + struct napi_struct *napi = dev_instance;
>> + struct net_device *dev = napi->dev;
>> + struct rtl8169_private *tp;
>> + int message_id;
>> +
>> + tp = netdev_priv(dev);
>> + message_id = napi - tp->rtl8169_napi;
>> +
>> + rtl8169_disable_hw_interrupt_msix(tp, message_id);
>> + rtl8169_clear_hw_isr(tp, message_id);
>> +
>> + napi_schedule(napi);
>> +
>> + return IRQ_HANDLED;
>> +}
>> +
>> +static irqreturn_t rtl8169_interrupt_other(int irq, void
>> +*dev_instance) {
>> + struct rtl8169_private *tp = dev_instance;
>> +
>> + rtl8169_clear_hw_isr(tp, MSIX_ID_VEC_MAP_LINKCHG);
>> + phy_mac_interrupt(tp->phydev);
>> + return IRQ_HANDLED;
>> }
>>
>> static int rtl8169_request_irq(struct rtl8169_private *tp) @@
>> -5047,8 +5124,26 @@ static int rtl8169_request_irq(struct
>> rtl8169_private *tp)
>>
>> for (i = 0; i < tp->irq_nvecs; i++) {
>> napi = &tp->rtl8169_napi[i];
>> - rc = pci_request_irq(tp->pci_dev, i, rtl8169_interrupt,
>> - NULL, napi, "%s-%d", dev->name, i);
>> + if (tp->irq_nvecs > 1) {
>> + if (i < R8169_MAX_QUEUES)
>> + rc = pci_request_irq(tp->pci_dev, i,
>> + rtl8169_interrupt_msix,
>> + NULL, napi, "%s-%d",
>> + dev->name, i);
>> + else if (i == MSIX_ID_VEC_MAP_LINKCHG)
>> + rc = pci_request_irq(tp->pci_dev, i,
>> + rtl8169_interrupt_other,
>> + NULL, tp, "%s-%d",
>> + dev->name, i);
>> + else
>> + continue;
>> + } else {
>> + rc = pci_request_irq(tp->pci_dev, i,
>> + rtl8169_interrupt,
>> + NULL, napi, "%s-%d",
>> + dev->name, i);
>> + }
>> +
>> if (rc)
>> goto free_irq;
>> }
>> @@ -5056,7 +5151,7 @@ static int rtl8169_request_irq(struct
>> rtl8169_private *tp)
>>
>> free_irq:
>> while (--i >= 0)
>> - pci_free_irq(tp->pci_dev, i, &tp->rtl8169_napi[i]);
>> + rtl8169_free_one_irq(tp, i);
>> return rc;
>> }
>>
>> @@ -5255,8 +5350,12 @@ static void rtl8169_netpoll(struct net_device
>*dev)
>> struct rtl8169_private *tp = netdev_priv(dev);
>>
>> for (int i = 0; i < tp->irq_nvecs; i++) {
>
>Looking at r8169_init_napi(), later down the patch, it only calls
>netif_napi_add() for min(tp->irq_nvecs, R8169_MAX_QUEUES) vectors, but this
>loop iterates all tp->irq_nvecs. Can this be an issue? Looks like it will be
>because entries entries >= R8169_MAX_QUEUES are zeroed but
>rtl8169_interrupt_msix() would set dev to NULL.
Thanks for pointing out this. I have forgotten to modify this.
Thanks,
Javen
^ permalink raw reply [flat|nested] 14+ messages in thread
* RE: [PATCH net-next v11 4/7] r8169: enable new interrupt mapping
2026-08-14 22:54 ` Mohsin Bashir
@ 2026-08-17 7:21 ` Javen
0 siblings, 0 replies; 14+ messages in thread
From: Javen @ 2026-08-17 7:21 UTC (permalink / raw)
To: Mohsin Bashir, hkallweit1@gmail.com, nic_swsd@realtek.com,
andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com,
kuba@kernel.org, pabeni@redhat.com, horms@kernel.org
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org
>
>
>On 8/13/26 6:52 PM, javen wrote:
>> From: Javen Xu <javen_xu@realsil.com.cn>
>>
>> This patch enables new interrupt mapping for RTL8127 and add error
>> pkts counter per ring.
>>
>> Signed-off-by: Javen Xu <javen_xu@realsil.com.cn>
>> ---
>> Changes in v2:
>> - no changes
>>
>> Changes in v3:
>> - no changes
>>
>> Changes in v4:
>> - no changes
>>
>> Changes in v5:
>> - no changes
>>
>> Changes in v6:
>> - no changes
>>
>> Changes in v7:
>> - no changes
>>
>> Changes in v8:
>> - no changes
>>
>> Changes in v9:
>> - no changes
>>
>> Changes in v10:
>> - no changes
>>
>> Changes in v11:
>> - add error pkts counter per ring
>> ---
>> drivers/net/ethernet/realtek/r8169_main.c | 80 +++++++++++++++++++----
>> 1 file changed, 68 insertions(+), 12 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/realtek/r8169_main.c
>> b/drivers/net/ethernet/realtek/r8169_main.c
>> index b30f0a31d7c7..aa72c42c374d 100644
>> --- a/drivers/net/ethernet/realtek/r8169_main.c
>> +++ b/drivers/net/ethernet/realtek/r8169_main.c
>> @@ -29,6 +29,7 @@
>> #include <linux/prefetch.h>
>> #include <linux/ipv6.h>
>> #include <linux/unaligned.h>
>> +#include <linux/u64_stats_sync.h>
>> #include <net/ip6_checksum.h>
>> #include <net/netdev_queues.h>
>> #include <net/phy/realtek_phy.h>
>> @@ -754,6 +755,15 @@ struct rtl8169_rx_ring {
>> dma_addr_t rx_desc_phy_addr[NUM_RX_DESC];
>> dma_addr_t rx_phy_addr;
>> struct page *rx_databuff[NUM_RX_DESC];
>> +
>> + struct {
>> + u64 rx_errors;
>> + u64 rx_dropped;
>> + u64 rx_length_errors;
>> + u64 rx_crc_errors;
>> + u64 multicast;
>> + struct u64_stats_sync syncp;
>> + } stats;
>> };
>>
>> struct rtl8169_private {
>> @@ -3939,6 +3949,15 @@ DECLARE_RTL_COND(rtl_mac_ocp_e00e_cond)
>> return r8168_mac_ocp_read(tp, 0xe00e) & BIT(13);
>> }
>>
>> +static void rtl8169_hw_enable_vec_mapping(struct rtl8169_private *tp)
>> +{
>> + u8 tmp;
>> +
>> + tmp = RTL_R8(tp, INT_CFG0_8125);
>> + tmp |= INT_CFG0_ENABLE_8125;
>> + RTL_W8(tp, INT_CFG0_8125, tmp);
>> +}
>> +
>> static void rtl_hw_start_8125_common(struct rtl8169_private *tp)
>> {
>> rtl_pcie_state_l2l3_disable(tp); @@ -3947,6 +3966,9 @@ static
>> void rtl_hw_start_8125_common(struct rtl8169_private *tp)
>> RTL_W32(tp, RSS_CTRL_8125, 0);
>> RTL_W16(tp, Q_NUM_CTRL_8125, 0);
>>
>> + if (tp->irq_nvecs > 1)
>> + rtl8169_hw_enable_vec_mapping(tp);
>> +
>> /* disable UPS */
>> r8168_mac_ocp_modify(tp, 0xd40a, 0x0010, 0x0000);
>>
>> @@ -4347,7 +4369,7 @@ static int rtl8169_init_ring(struct
>> rtl8169_private *tp)
>>
>> memset(tp->tx_skb, 0, sizeof(tp->tx_skb));
>>
>> - for (i = 0; i < tp->num_rx_rings; i++) {
>> + for (int i = 0; i < tp->num_rx_rings; i++) {
>
>This looks like an unrelated change. Looking the function body, this is
>introducing a new bug on the cleanup path by changing the scope of i.
Yes, this change have been dropped in the next version.
Thanks,
Javen
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH net-next v11 4/7] r8169: enable new interrupt mapping
2026-08-14 1:52 ` [PATCH net-next v11 4/7] r8169: enable " javen
2026-08-14 22:54 ` Mohsin Bashir
@ 2026-08-17 23:38 ` Jakub Kicinski
1 sibling, 0 replies; 14+ messages in thread
From: Jakub Kicinski @ 2026-08-17 23:38 UTC (permalink / raw)
To: javen
Cc: hkallweit1, nic_swsd, andrew+netdev, davem, edumazet, pabeni,
horms, netdev, linux-kernel
On Fri, 14 Aug 2026 09:52:00 +0800 javen wrote:
> This patch enables new interrupt mapping for RTL8127 and add error pkts
> counter per ring.
drivers/net/ethernet/realtek/r8169_main.c:4383:11: warning: variable 'i' is uninitialized when used here [-Wuninitialized]
4383 | while (--i >= 0)
| ^
drivers/net/ethernet/realtek/r8169_main.c:4365:7: note: initialize the variable 'i' to silence this warning
4365 | int i, ret;
| ^
| = 0
--
pw-bot: cr
^ permalink raw reply [flat|nested] 14+ messages in thread
end of thread, other threads:[~2026-08-17 23:38 UTC | newest]
Thread overview: 14+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-08-14 1:51 [PATCH net-next v11 0/7] r8169: add RSS support for RTL8127 javen
2026-08-14 1:51 ` [PATCH net-next v11 1/7] r8169: add support for multi irqs javen
2026-08-14 1:51 ` [PATCH net-next v11 2/7] r8169: refactor RX path to prepare for multi-queue javen
2026-08-14 1:51 ` [PATCH net-next v11 3/7] r8169: add support for new interrupt mapping javen
2026-08-14 22:45 ` Mohsin Bashir
2026-08-17 7:21 ` Javen
2026-08-14 1:52 ` [PATCH net-next v11 4/7] r8169: enable " javen
2026-08-14 22:54 ` Mohsin Bashir
2026-08-17 7:21 ` Javen
2026-08-17 23:38 ` Jakub Kicinski
2026-08-14 1:52 ` [PATCH net-next v11 5/7] r8169: add support and enable rss javen
2026-08-14 23:00 ` Mohsin Bashir
2026-08-14 1:52 ` [PATCH net-next v11 6/7] r8169: move struct ethtool_ops javen
2026-08-14 1:52 ` [PATCH net-next v11 7/7] r8169: add get_channel support for ethtool javen
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