From: Stefan Chulski <[email protected]>
Armada hardware has a pause generation mechanism in GOP (MAC).
The GOP generate flow control frames based on an indication programmed in Ports Control 0 Register. There is a bit per port.
However assertion of the PortX Pause bits in the ports control 0 register only sends a one time pause.
To complement the function the GOP has a mechanism to periodically send pause control messages based on periodic counters.
This mechanism ensures that the pause is effective as long as the Appropriate PortX Pause is asserted.
Problem is that Packet Processor that actually can drop packets due to lack of resources not connected to the GOP flow control generation mechanism.
To solve this issue Armada has firmware running on CM3 CPU dedicated for Flow Control support.
Firmware monitors Packet Processor resources and asserts XON/XOFF by writing to Ports Control 0 Register.
MSS shared SRAM memory used to communicate between CM3 firmware and PP2 driver.
During init PP2 driver informs firmware about used BM pools, RXQs, congestion and depletion thresholds.
The pause frames are generated whenever congestion or depletion in resources is detected.
The back pressure is stopped when the resource reaches a sufficient level.
So the congestion/depletion and sufficient level implement a hysteresis that reduces the XON/XOFF toggle frequency.
Packet Processor v23 hardware introduces support for RX FIFO fill level monitor.
Patch "add PPv23 version definition" to differ between v23 and v22 hardware.
Patch "add TX FC firmware check" verifies that CM3 firmware supports Flow Control monitoring.
v12 --> v13
- Remove bm_underrun_protect module_param
v11 --> v12
- Improve warning message in "net: mvpp2: add TX FC firmware check" patch
v10 --> v11
- Improve "net: mvpp2: add CM3 SRAM memory map" comment
- Move condition check to 'net: mvpp2: always compare hw-version vs MVPP21' patch
v9 --> v10
- Add CM3 SRAM description to PPv2 documentation
v8 --> v9
- Replace generic pool allocation with devm_ioremap_resource
v7 --> v8
- Reorder "always compare hw-version vs MVPP21" and "add PPv23 version definition" commits
- Typo fixes
- Remove condition fix from "add RXQ flow control configurations"
v6 --> v7
- Reduce patch set from 18 to 15 patches
- Documentation change combined into a single patch
- RXQ and BM size change combined into a single patch
- Ring size change check moved into "add RXQ flow control configurations" commit
v5 --> v6
- No change
v4 --> v5
- Add missed Signed-off
- Fix warnings in patches 3 and 12
- Add revision requirement to warning message
- Move mss_spinlock into RXQ flow control configurations patch
- Improve FCA RXQ non occupied descriptor threshold commit message
v3 --> v4
- Remove RFC tag
v2 --> v3
- Remove inline functions
- Add PPv2.3 description into marvell-pp2.txt
- Improve mvpp2_interrupts_mask/unmask procedure
- Improve FC enable/disable procedure
- Add priv->sram_pool check
- Remove gen_pool_destroy call
- Reduce Flow Control timer to x100 faster
v1 --> v2
- Add memory requirements information
- Add EPROBE_DEFER if of_gen_pool_get return NULL
- Move Flow control configuration to mvpp2_mac_link_up callback
- Add firmware version info with Flow control support
Konstantin Porotchkin (1):
dts: marvell: add CM3 SRAM memory to cp11x ethernet device tree
Stefan Chulski (14):
doc: marvell: add CM3 address space and PPv2.3 description
net: mvpp2: add CM3 SRAM memory map
net: mvpp2: always compare hw-version vs MVPP21
net: mvpp2: add PPv23 version definition
net: mvpp2: increase BM pool and RXQ size
net: mvpp2: add FCA periodic timer configurations
net: mvpp2: add FCA RXQ non occupied descriptor threshold
net: mvpp2: enable global flow control
net: mvpp2: add RXQ flow control configurations
net: mvpp2: add ethtool flow control configuration support
net: mvpp2: add BM protection underrun feature support
net: mvpp2: add PPv23 RX FIFO flow control
net: mvpp2: set 802.3x GoP Flow Control mode
net: mvpp2: add TX FC firmware check
Documentation/devicetree/bindings/net/marvell-pp2.txt | 6 +-
arch/arm64/boot/dts/marvell/armada-cp11x.dtsi | 2 +-
drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 124 ++++-
drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 516 ++++++++++++++++++--
4 files changed, 599 insertions(+), 49 deletions(-)
--
1.9.1
From: Stefan Chulski <[email protected]>
This patch adds CM3 memory map.
Signed-off-by: Stefan Chulski <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
Acked-by: Marcin Wojtas <[email protected]>
---
drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 1 +
drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 26 ++++++++++++++++++++
2 files changed, 27 insertions(+)
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
index 6bd7e40..56e90ab 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
@@ -925,6 +925,7 @@ struct mvpp2 {
/* Shared registers' base addresses */
void __iomem *lms_base;
void __iomem *iface_base;
+ void __iomem *cm3_base;
/* On PPv2.2, each "software thread" can access the base
* register through a separate address space, each 64 KB apart
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index a07cf60..eec3796 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -6846,6 +6846,27 @@ static int mvpp2_init(struct platform_device *pdev, struct mvpp2 *priv)
return 0;
}
+static int mvpp2_get_sram(struct platform_device *pdev,
+ struct mvpp2 *priv)
+{
+ struct resource *res;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
+ if (!res) {
+ if (has_acpi_companion(&pdev->dev))
+ dev_warn(&pdev->dev, "ACPI is too old, Flow control not supported\n");
+ else
+ dev_warn(&pdev->dev, "DT is too old, Flow control not supported\n");
+ return 0;
+ }
+
+ priv->cm3_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(priv->cm3_base))
+ return PTR_ERR(priv->cm3_base);
+
+ return 0;
+}
+
static int mvpp2_probe(struct platform_device *pdev)
{
const struct acpi_device_id *acpi_id;
@@ -6902,6 +6923,11 @@ static int mvpp2_probe(struct platform_device *pdev)
priv->iface_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(priv->iface_base))
return PTR_ERR(priv->iface_base);
+
+ /* Map CM3 SRAM */
+ err = mvpp2_get_sram(pdev, priv);
+ if (err)
+ dev_warn(&pdev->dev, "Fail to alloc CM3 SRAM\n");
}
if (priv->hw_version == MVPP22 && dev_of_node(&pdev->dev)) {
--
1.9.1
From: Konstantin Porotchkin <[email protected]>
CM3 SRAM address space will be used for Flow Control configuration.
Signed-off-by: Stefan Chulski <[email protected]>
Signed-off-by: Konstantin Porotchkin <[email protected]>
Acked-by: Marcin Wojtas <[email protected]>
Acked-by: Rob Herring <[email protected]>
---
arch/arm64/boot/dts/marvell/armada-cp11x.dtsi | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/marvell/armada-cp11x.dtsi b/arch/arm64/boot/dts/marvell/armada-cp11x.dtsi
index 9dcf16b..6fe0d26 100644
--- a/arch/arm64/boot/dts/marvell/armada-cp11x.dtsi
+++ b/arch/arm64/boot/dts/marvell/armada-cp11x.dtsi
@@ -59,7 +59,7 @@
CP11X_LABEL(ethernet): ethernet@0 {
compatible = "marvell,armada-7k-pp22";
- reg = <0x0 0x100000>, <0x129000 0xb000>;
+ reg = <0x0 0x100000>, <0x129000 0xb000>, <0x220000 0x800>;
clocks = <&CP11X_LABEL(clk) 1 3>, <&CP11X_LABEL(clk) 1 9>,
<&CP11X_LABEL(clk) 1 5>, <&CP11X_LABEL(clk) 1 6>,
<&CP11X_LABEL(clk) 1 18>;
--
1.9.1
From: Stefan Chulski <[email protected]>
Patch adds CM3 address space and PPv2.3 description.
Signed-off-by: Stefan Chulski <[email protected]>
Acked-by: Marcin Wojtas <[email protected]>
---
Documentation/devicetree/bindings/net/marvell-pp2.txt | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/net/marvell-pp2.txt b/Documentation/devicetree/bindings/net/marvell-pp2.txt
index b783976..ce15c17 100644
--- a/Documentation/devicetree/bindings/net/marvell-pp2.txt
+++ b/Documentation/devicetree/bindings/net/marvell-pp2.txt
@@ -1,5 +1,6 @@
* Marvell Armada 375 Ethernet Controller (PPv2.1)
Marvell Armada 7K/8K Ethernet Controller (PPv2.2)
+ Marvell CN913X Ethernet Controller (PPv2.3)
Required properties:
@@ -12,10 +13,11 @@ Required properties:
- common controller registers
- LMS registers
- one register area per Ethernet port
- For "marvell,armada-7k-pp2", must contain the following register
+ For "marvell,armada-7k-pp2" used by 7K/8K and CN913X, must contain the following register
sets:
- packet processor registers
- networking interfaces registers
+ - CM3 address space used for TX Flow Control
- clocks: pointers to the reference clocks for this device, consequently:
- main controller clock (for both armada-375-pp2 and armada-7k-pp2)
@@ -81,7 +83,7 @@ Example for marvell,armada-7k-pp2:
cpm_ethernet: ethernet@0 {
compatible = "marvell,armada-7k-pp22";
- reg = <0x0 0x100000>, <0x129000 0xb000>;
+ reg = <0x0 0x100000>, <0x129000 0xb000>, <0x220000 0x800>;
clocks = <&cpm_syscon0 1 3>, <&cpm_syscon0 1 9>,
<&cpm_syscon0 1 5>, <&cpm_syscon0 1 6>, <&cpm_syscon0 1 18>;
clock-names = "pp_clk", "gop_clk", "mg_clk", "mg_core_clk", "axi_clk";
--
1.9.1
From: Stefan Chulski <[email protected]>
This patch add PPv23 version definition.
PPv23 is new packet processor in CP115.
Everything that supported by PPv22, also supported by PPv23.
No functional changes in this stage.
Signed-off-by: Stefan Chulski <[email protected]>
Acked-by: Marcin Wojtas <[email protected]>
---
drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 24 ++++++++++++--------
drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 15 ++++++++----
2 files changed, 24 insertions(+), 15 deletions(-)
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
index 56e90ab..ce08086 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
@@ -60,6 +60,9 @@
/* Top Registers */
#define MVPP2_MH_REG(port) (0x5040 + 4 * (port))
#define MVPP2_DSA_EXTENDED BIT(5)
+#define MVPP2_VER_ID_REG 0x50b0
+#define MVPP2_VER_PP22 0x10
+#define MVPP2_VER_PP23 0x11
/* Parser Registers */
#define MVPP2_PRS_INIT_LOOKUP_REG 0x1000
@@ -469,7 +472,7 @@
#define MVPP22_GMAC_INT_SUM_MASK_LINK_STAT BIT(1)
#define MVPP22_GMAC_INT_SUM_MASK_PTP BIT(2)
-/* Per-port XGMAC registers. PPv2.2 only, only for GOP port 0,
+/* Per-port XGMAC registers. PPv2.2 and PPv2.3, only for GOP port 0,
* relative to port->base.
*/
#define MVPP22_XLG_CTRL0_REG 0x100
@@ -506,7 +509,7 @@
#define MVPP22_XLG_CTRL4_MACMODSELECT_GMAC BIT(12)
#define MVPP22_XLG_CTRL4_EN_IDLE_CHECK BIT(14)
-/* SMI registers. PPv2.2 only, relative to priv->iface_base. */
+/* SMI registers. PPv2.2 and PPv2.3, relative to priv->iface_base. */
#define MVPP22_SMI_MISC_CFG_REG 0x1204
#define MVPP22_SMI_POLLING_EN BIT(10)
@@ -582,7 +585,7 @@
#define MVPP2_QUEUE_NEXT_DESC(q, index) \
(((index) < (q)->last_desc) ? ((index) + 1) : 0)
-/* XPCS registers. PPv2.2 only */
+/* XPCS registers.PPv2.2 and PPv2.3 */
#define MVPP22_MPCS_BASE(port) (0x7000 + (port) * 0x1000)
#define MVPP22_MPCS_CTRL 0x14
#define MVPP22_MPCS_CTRL_FWD_ERR_CONN BIT(10)
@@ -593,7 +596,7 @@
#define MVPP22_MPCS_CLK_RESET_DIV_RATIO(n) ((n) << 4)
#define MVPP22_MPCS_CLK_RESET_DIV_SET BIT(11)
-/* XPCS registers. PPv2.2 only */
+/* XPCS registers. PPv2.2 and PPv2.3 */
#define MVPP22_XPCS_BASE(port) (0x7400 + (port) * 0x1000)
#define MVPP22_XPCS_CFG0 0x0
#define MVPP22_XPCS_CFG0_RESET_DIS BIT(0)
@@ -927,15 +930,16 @@ struct mvpp2 {
void __iomem *iface_base;
void __iomem *cm3_base;
- /* On PPv2.2, each "software thread" can access the base
+ /* On PPv2.2 and PPv2.3, each "software thread" can access the base
* register through a separate address space, each 64 KB apart
* from each other. Typically, such address spaces will be
* used per CPU.
*/
void __iomem *swth_base[MVPP2_MAX_THREADS];
- /* On PPv2.2, some port control registers are located into the system
- * controller space. These registers are accessible through a regmap.
+ /* On PPv2.2 and PPv2.3, some port control registers are located into
+ * the system controller space. These registers are accessible
+ * through a regmap.
*/
struct regmap *sysctrl_base;
@@ -977,7 +981,7 @@ struct mvpp2 {
u32 tclk;
/* HW version */
- enum { MVPP21, MVPP22 } hw_version;
+ enum { MVPP21, MVPP22, MVPP23 } hw_version;
/* Maximum number of RXQs per port */
unsigned int max_port_rxqs;
@@ -1221,7 +1225,7 @@ struct mvpp21_rx_desc {
__le32 reserved8;
};
-/* HW TX descriptor for PPv2.2 */
+/* HW TX descriptor for PPv2.2 and PPv2.3 */
struct mvpp22_tx_desc {
__le32 command;
u8 packet_offset;
@@ -1233,7 +1237,7 @@ struct mvpp22_tx_desc {
__le64 buf_cookie_misc;
};
-/* HW RX descriptor for PPv2.2 */
+/* HW RX descriptor for PPv2.2 and PPv2.3 */
struct mvpp22_rx_desc {
__le32 status;
__le16 reserved1;
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index 17cd161..5730900 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -384,7 +384,7 @@ static int mvpp2_bm_pool_create(struct device *dev, struct mvpp2 *priv,
if (!IS_ALIGNED(size, 16))
return -EINVAL;
- /* PPv2.1 needs 8 bytes per buffer pointer, PPv2.2 needs 16
+ /* PPv2.1 needs 8 bytes per buffer pointer, PPv2.2 and PPv2.3 needs 16
* bytes per buffer pointer
*/
if (priv->hw_version == MVPP21)
@@ -5456,7 +5456,7 @@ static void mvpp2_rx_irqs_setup(struct mvpp2_port *port)
return;
}
- /* Handle the more complicated PPv2.2 case */
+ /* Handle the more complicated PPv2.2 and PPv2.3 case */
for (i = 0; i < port->nqvecs; i++) {
struct mvpp2_queue_vector *qv = port->qvecs + i;
@@ -5633,7 +5633,7 @@ static bool mvpp22_port_has_legacy_tx_irqs(struct device_node *port_node,
/* Checks if the port dt description has the required Tx interrupts:
* - PPv2.1: there are no such interrupts.
- * - PPv2.2:
+ * - PPv2.2 and PPv2.3:
* - The old DTs have: "rx-shared", "tx-cpuX" with X in [0...3]
* - The new ones have: "hifX" with X in [0..8]
*
@@ -6621,7 +6621,7 @@ static void mvpp22_rx_fifo_set_hw(struct mvpp2 *priv, int port, int data_size)
mvpp2_write(priv, MVPP2_RX_ATTR_FIFO_SIZE_REG(port), attr_size);
}
-/* Initialize TX FIFO's: the total FIFO size is 48kB on PPv2.2.
+/* Initialize TX FIFO's: the total FIFO size is 48kB on PPv2.2 and PPv2.3.
* 4kB fixed space must be assigned for the loopback port.
* Redistribute remaining avialable 44kB space among all active ports.
* Guarantee minimum 32kB for 10G port and 8kB for port 1, capable of 2.5G
@@ -6678,7 +6678,7 @@ static void mvpp22_tx_fifo_set_hw(struct mvpp2 *priv, int port, int size)
mvpp2_write(priv, MVPP22_TX_FIFO_THRESH_REG(port), threshold);
}
-/* Initialize TX FIFO's: the total FIFO size is 19kB on PPv2.2.
+/* Initialize TX FIFO's: the total FIFO size is 19kB on PPv2.2 and PPv2.3.
* 3kB fixed space must be assigned for the loopback port.
* Redistribute remaining avialable 16kB space among all active ports.
* The 10G interface should use 10kB (which is maximum possible size
@@ -7049,6 +7049,11 @@ static int mvpp2_probe(struct platform_device *pdev)
priv->port_map |= BIT(i);
}
+ if (priv->hw_version != MVPP21) {
+ if (mvpp2_read(priv, MVPP2_VER_ID_REG) == MVPP2_VER_PP23)
+ priv->hw_version = MVPP23;
+ }
+
/* Initialize network controller */
err = mvpp2_init(pdev, priv);
if (err < 0) {
--
1.9.1
From: Stefan Chulski <[email protected]>
BM pool and RXQ size increased to support Firmware Flow Control.
Minimum depletion thresholds to support FC are 1024 buffers.
BM pool size increased to 2048 to have some 1024 buffers
space between depletion thresholds and BM pool size.
Jumbo frames require a 9888B buffer, so memory requirements
for data buffers increased from 7MB to 24MB.
Signed-off-by: Stefan Chulski <[email protected]>
Acked-by: Marcin Wojtas <[email protected]>
---
drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
index ce08086..e7bbf0a 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
@@ -715,8 +715,8 @@
#define MVPP2_PORT_MAX_RXQ 32
/* Max number of Rx descriptors */
-#define MVPP2_MAX_RXD_MAX 1024
-#define MVPP2_MAX_RXD_DFLT 128
+#define MVPP2_MAX_RXD_MAX 2048
+#define MVPP2_MAX_RXD_DFLT 1024
/* Max number of Tx descriptors */
#define MVPP2_MAX_TXD_MAX 2048
@@ -848,8 +848,8 @@ enum mvpp22_ptp_packet_format {
#define MVPP22_PTP_TIMESTAMPQUEUESELECT BIT(18)
/* BM constants */
-#define MVPP2_BM_JUMBO_BUF_NUM 512
-#define MVPP2_BM_LONG_BUF_NUM 1024
+#define MVPP2_BM_JUMBO_BUF_NUM 2048
+#define MVPP2_BM_LONG_BUF_NUM 2048
#define MVPP2_BM_SHORT_BUF_NUM 2048
#define MVPP2_BM_POOL_SIZE_MAX (16*1024 - MVPP2_BM_POOL_PTR_ALIGN/4)
#define MVPP2_BM_POOL_PTR_ALIGN 128
--
1.9.1
From: Stefan Chulski <[email protected]>
Flow Control periodic timer would be used if port in
XOFF to transmit periodic XOFF frames.
Signed-off-by: Stefan Chulski <[email protected]>
Acked-by: Marcin Wojtas <[email protected]>
---
drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 13 ++++++
drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 45 ++++++++++++++++++++
2 files changed, 58 insertions(+)
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
index e7bbf0a..9239d80 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
@@ -596,6 +596,15 @@
#define MVPP22_MPCS_CLK_RESET_DIV_RATIO(n) ((n) << 4)
#define MVPP22_MPCS_CLK_RESET_DIV_SET BIT(11)
+/* FCA registers. PPv2.2 and PPv2.3 */
+#define MVPP22_FCA_BASE(port) (0x7600 + (port) * 0x1000)
+#define MVPP22_FCA_REG_SIZE 16
+#define MVPP22_FCA_REG_MASK 0xFFFF
+#define MVPP22_FCA_CONTROL_REG 0x0
+#define MVPP22_FCA_ENABLE_PERIODIC BIT(11)
+#define MVPP22_PERIODIC_COUNTER_LSB_REG (0x110)
+#define MVPP22_PERIODIC_COUNTER_MSB_REG (0x114)
+
/* XPCS registers. PPv2.2 and PPv2.3 */
#define MVPP22_XPCS_BASE(port) (0x7400 + (port) * 0x1000)
#define MVPP22_XPCS_CFG0 0x0
@@ -751,6 +760,10 @@
#define MVPP2_TX_FIFO_THRESHOLD(kb) \
((kb) * 1024 - MVPP2_TX_FIFO_THRESHOLD_MIN)
+/* MSS Flow control */
+#define FC_QUANTA 0xFFFF
+#define FC_CLK_DIVIDER 100
+
/* RX buffer constants */
#define MVPP2_SKB_SHINFO_SIZE \
SKB_DATA_ALIGN(sizeof(struct skb_shared_info))
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index 5730900..761f745 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -1280,6 +1280,49 @@ static void mvpp22_gop_init_10gkr(struct mvpp2_port *port)
writel(val, mpcs + MVPP22_MPCS_CLK_RESET);
}
+static void mvpp22_gop_fca_enable_periodic(struct mvpp2_port *port, bool en)
+{
+ struct mvpp2 *priv = port->priv;
+ void __iomem *fca = priv->iface_base + MVPP22_FCA_BASE(port->gop_id);
+ u32 val;
+
+ val = readl(fca + MVPP22_FCA_CONTROL_REG);
+ val &= ~MVPP22_FCA_ENABLE_PERIODIC;
+ if (en)
+ val |= MVPP22_FCA_ENABLE_PERIODIC;
+ writel(val, fca + MVPP22_FCA_CONTROL_REG);
+}
+
+static void mvpp22_gop_fca_set_timer(struct mvpp2_port *port, u32 timer)
+{
+ struct mvpp2 *priv = port->priv;
+ void __iomem *fca = priv->iface_base + MVPP22_FCA_BASE(port->gop_id);
+ u32 lsb, msb;
+
+ lsb = timer & MVPP22_FCA_REG_MASK;
+ msb = timer >> MVPP22_FCA_REG_SIZE;
+
+ writel(lsb, fca + MVPP22_PERIODIC_COUNTER_LSB_REG);
+ writel(msb, fca + MVPP22_PERIODIC_COUNTER_MSB_REG);
+}
+
+/* Set Flow Control timer x100 faster than pause quanta to ensure that link
+ * partner won't send traffic if port is in XOFF mode.
+ */
+static void mvpp22_gop_fca_set_periodic_timer(struct mvpp2_port *port)
+{
+ u32 timer;
+
+ timer = (port->priv->tclk / (USEC_PER_SEC * FC_CLK_DIVIDER))
+ * FC_QUANTA;
+
+ mvpp22_gop_fca_enable_periodic(port, false);
+
+ mvpp22_gop_fca_set_timer(port, timer);
+
+ mvpp22_gop_fca_enable_periodic(port, true);
+}
+
static int mvpp22_gop_init(struct mvpp2_port *port)
{
struct mvpp2 *priv = port->priv;
@@ -1324,6 +1367,8 @@ static int mvpp22_gop_init(struct mvpp2_port *port)
val |= GENCONF_SOFT_RESET1_GOP;
regmap_write(priv->sysctrl_base, GENCONF_SOFT_RESET1, val);
+ mvpp22_gop_fca_set_periodic_timer(port);
+
unsupported_conf:
return 0;
--
1.9.1
From: Stefan Chulski <[email protected]>
This patch enables global flow control in FW and in the phylink validate mask.
Signed-off-by: Stefan Chulski <[email protected]>
Acked-by: Marcin Wojtas <[email protected]>
---
drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 11 +++++--
drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 30 +++++++++++++++++++-
2 files changed, 37 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
index d2cc513c..8945fb9 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
@@ -763,9 +763,11 @@
((kb) * 1024 - MVPP2_TX_FIFO_THRESHOLD_MIN)
/* MSS Flow control */
-#define FC_QUANTA 0xFFFF
-#define FC_CLK_DIVIDER 100
-#define MSS_THRESHOLD_STOP 768
+#define MSS_FC_COM_REG 0
+#define FLOW_CONTROL_ENABLE_BIT BIT(0)
+#define FC_QUANTA 0xFFFF
+#define FC_CLK_DIVIDER 100
+#define MSS_THRESHOLD_STOP 768
/* RX buffer constants */
#define MVPP2_SKB_SHINFO_SIZE \
@@ -1017,6 +1019,9 @@ struct mvpp2 {
/* page_pool allocator */
struct page_pool *page_pool[MVPP2_PORT_MAX_RXQ];
+
+ /* Global TX Flow Control config */
+ bool global_tx_fc;
};
struct mvpp2_pcpu_stats {
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index 8b4073c..027101b 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -91,6 +91,16 @@ static inline u32 mvpp2_cpu_to_thread(struct mvpp2 *priv, int cpu)
return cpu % priv->nthreads;
}
+static void mvpp2_cm3_write(struct mvpp2 *priv, u32 offset, u32 data)
+{
+ writel(data, priv->cm3_base + offset);
+}
+
+static u32 mvpp2_cm3_read(struct mvpp2 *priv, u32 offset)
+{
+ return readl(priv->cm3_base + offset);
+}
+
static struct page_pool *
mvpp2_create_page_pool(struct device *dev, int num, int len,
enum dma_data_direction dma_dir)
@@ -5950,6 +5960,11 @@ static void mvpp2_phylink_validate(struct phylink_config *config,
phylink_set(mask, Autoneg);
phylink_set_port_modes(mask);
+ if (port->priv->global_tx_fc) {
+ phylink_set(mask, Pause);
+ phylink_set(mask, Asym_Pause);
+ }
+
switch (state->interface) {
case PHY_INTERFACE_MODE_10GBASER:
case PHY_INTERFACE_MODE_XAUI:
@@ -6951,7 +6966,7 @@ static int mvpp2_probe(struct platform_device *pdev)
struct resource *res;
void __iomem *base;
int i, shared;
- int err;
+ int err, val;
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
@@ -7003,6 +7018,10 @@ static int mvpp2_probe(struct platform_device *pdev)
err = mvpp2_get_sram(pdev, priv);
if (err)
dev_warn(&pdev->dev, "Fail to alloc CM3 SRAM\n");
+
+ /* Enable global Flow Control only if handler to SRAM not NULL */
+ if (priv->cm3_base)
+ priv->global_tx_fc = true;
}
if (priv->hw_version != MVPP21 && dev_of_node(&pdev->dev)) {
@@ -7168,6 +7187,15 @@ static int mvpp2_probe(struct platform_device *pdev)
goto err_port_probe;
}
+ /* Enable global flow control. In this stage global
+ * flow control enabled, but still disabled per port.
+ */
+ if (priv->global_tx_fc && priv->hw_version != MVPP21) {
+ val = mvpp2_cm3_read(priv, MSS_FC_COM_REG);
+ val |= FLOW_CONTROL_ENABLE_BIT;
+ mvpp2_cm3_write(priv, MSS_FC_COM_REG, val);
+ }
+
mvpp2_dbgfs_init(priv, pdev->name);
platform_set_drvdata(pdev, priv);
--
1.9.1
From: Stefan Chulski <[email protected]>
The firmware needs to monitor the RX Non-occupied descriptor
bits for flow control to move to XOFF mode.
These bits need to be unmasked to be functional, but they will
not raise interrupts as we leave the RX exception summary
bit in MVPP2_ISR_RX_TX_MASK_REG clear.
Signed-off-by: Stefan Chulski <[email protected]>
Acked-by: Marcin Wojtas <[email protected]>
---
drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 3 ++
drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 44 ++++++++++++++++----
2 files changed, 40 insertions(+), 7 deletions(-)
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
index 9239d80..d2cc513c 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
@@ -295,6 +295,8 @@
#define MVPP2_PON_CAUSE_TXP_OCCUP_DESC_ALL_MASK 0x3fc00000
#define MVPP2_PON_CAUSE_MISC_SUM_MASK BIT(31)
#define MVPP2_ISR_MISC_CAUSE_REG 0x55b0
+#define MVPP2_ISR_RX_ERR_CAUSE_REG(port) (0x5520 + 4 * (port))
+#define MVPP2_ISR_RX_ERR_CAUSE_NONOCC_MASK 0x00ff
/* Buffer Manager registers */
#define MVPP2_BM_POOL_BASE_REG(pool) (0x6000 + ((pool) * 4))
@@ -763,6 +765,7 @@
/* MSS Flow control */
#define FC_QUANTA 0xFFFF
#define FC_CLK_DIVIDER 100
+#define MSS_THRESHOLD_STOP 768
/* RX buffer constants */
#define MVPP2_SKB_SHINFO_SIZE \
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index 761f745..8b4073c 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -1133,14 +1133,19 @@ static inline void mvpp2_qvec_interrupt_disable(struct mvpp2_queue_vector *qvec)
static void mvpp2_interrupts_mask(void *arg)
{
struct mvpp2_port *port = arg;
+ int cpu = smp_processor_id();
+ u32 thread;
/* If the thread isn't used, don't do anything */
- if (smp_processor_id() > port->priv->nthreads)
+ if (cpu > port->priv->nthreads)
return;
- mvpp2_thread_write(port->priv,
- mvpp2_cpu_to_thread(port->priv, smp_processor_id()),
+ thread = mvpp2_cpu_to_thread(port->priv, cpu);
+
+ mvpp2_thread_write(port->priv, thread,
MVPP2_ISR_RX_TX_MASK_REG(port->id), 0);
+ mvpp2_thread_write(port->priv, thread,
+ MVPP2_ISR_RX_ERR_CAUSE_REG(port->id), 0);
}
/* Unmask the current thread's Rx/Tx interrupts.
@@ -1150,20 +1155,25 @@ static void mvpp2_interrupts_mask(void *arg)
static void mvpp2_interrupts_unmask(void *arg)
{
struct mvpp2_port *port = arg;
- u32 val;
+ int cpu = smp_processor_id();
+ u32 val, thread;
/* If the thread isn't used, don't do anything */
- if (smp_processor_id() > port->priv->nthreads)
+ if (cpu > port->priv->nthreads)
return;
+ thread = mvpp2_cpu_to_thread(port->priv, cpu);
+
val = MVPP2_CAUSE_MISC_SUM_MASK |
MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK(port->priv->hw_version);
if (port->has_tx_irqs)
val |= MVPP2_CAUSE_TXQ_OCCUP_DESC_ALL_MASK;
- mvpp2_thread_write(port->priv,
- mvpp2_cpu_to_thread(port->priv, smp_processor_id()),
+ mvpp2_thread_write(port->priv, thread,
MVPP2_ISR_RX_TX_MASK_REG(port->id), val);
+ mvpp2_thread_write(port->priv, thread,
+ MVPP2_ISR_RX_ERR_CAUSE_REG(port->id),
+ MVPP2_ISR_RX_ERR_CAUSE_NONOCC_MASK);
}
static void
@@ -1188,6 +1198,9 @@ static void mvpp2_interrupts_unmask(void *arg)
mvpp2_thread_write(port->priv, v->sw_thread_id,
MVPP2_ISR_RX_TX_MASK_REG(port->id), val);
+ mvpp2_thread_write(port->priv, v->sw_thread_id,
+ MVPP2_ISR_RX_ERR_CAUSE_REG(port->id),
+ MVPP2_ISR_RX_ERR_CAUSE_NONOCC_MASK);
}
}
@@ -2393,6 +2406,20 @@ static void mvpp2_txp_max_tx_size_set(struct mvpp2_port *port)
}
}
+/* Set the number of non-occupied descriptors threshold */
+static void mvpp2_set_rxq_free_tresh(struct mvpp2_port *port,
+ struct mvpp2_rx_queue *rxq)
+{
+ u32 val;
+
+ mvpp2_write(port->priv, MVPP2_RXQ_NUM_REG, rxq->id);
+
+ val = mvpp2_read(port->priv, MVPP2_RXQ_THRESH_REG);
+ val &= ~MVPP2_RXQ_NON_OCCUPIED_MASK;
+ val |= MSS_THRESHOLD_STOP << MVPP2_RXQ_NON_OCCUPIED_OFFSET;
+ mvpp2_write(port->priv, MVPP2_RXQ_THRESH_REG, val);
+}
+
/* Set the number of packets that will be received before Rx interrupt
* will be generated by HW.
*/
@@ -2648,6 +2675,9 @@ static int mvpp2_rxq_init(struct mvpp2_port *port,
mvpp2_rx_pkts_coal_set(port, rxq);
mvpp2_rx_time_coal_set(port, rxq);
+ /* Set the number of non occupied descriptors threshold */
+ mvpp2_set_rxq_free_tresh(port, rxq);
+
/* Add number of descriptors ready for receiving packets */
mvpp2_rxq_status_update(port, rxq->id, 0, rxq->size);
--
1.9.1
From: Stefan Chulski <[email protected]>
This patch add ethtool flow control configuration support.
Tx flow control retrieved correctly by ethtool get function.
FW per port ethtool configuration capability added.
Patch also takes care about mtu change procedure, if PPv2 switch
BM pools during mtu change.
Signed-off-by: Stefan Chulski <[email protected]>
Acked-by: Marcin Wojtas <[email protected]>
---
drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 13 +++
drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 98 ++++++++++++++++++++
2 files changed, 111 insertions(+)
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
index 0010a3e9..0731dc7 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
@@ -774,6 +774,19 @@
#define MSS_RXQ_TRESH_REG(q, fq) (MSS_RXQ_TRESH_BASE + (((q) + (fq)) \
* MSS_RXQ_TRESH_OFFS))
+#define MSS_BUF_POOL_BASE 0x40
+#define MSS_BUF_POOL_OFFS 4
+#define MSS_BUF_POOL_REG(id) (MSS_BUF_POOL_BASE \
+ + (id) * MSS_BUF_POOL_OFFS)
+
+#define MSS_BUF_POOL_STOP_MASK 0xFFF
+#define MSS_BUF_POOL_START_MASK (0xFFF << MSS_BUF_POOL_START_OFFS)
+#define MSS_BUF_POOL_START_OFFS 12
+#define MSS_BUF_POOL_PORTS_MASK (0xF << MSS_BUF_POOL_PORTS_OFFS)
+#define MSS_BUF_POOL_PORTS_OFFS 24
+#define MSS_BUF_POOL_PORT_OFFS(id) (0x1 << \
+ ((id) + MSS_BUF_POOL_PORTS_OFFS))
+
#define MSS_RXQ_TRESH_START_MASK 0xFFFF
#define MSS_RXQ_TRESH_STOP_MASK (0xFFFF << MSS_RXQ_TRESH_STOP_OFFS)
#define MSS_RXQ_TRESH_STOP_OFFS 16
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index f1770e5..90c9265 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -845,6 +845,59 @@ static void mvpp2_rxq_disable_fc(struct mvpp2_port *port)
spin_unlock_irqrestore(&port->priv->mss_spinlock, flags);
}
+/* Routine disable/enable flow control for BM pool condition */
+static void mvpp2_bm_pool_update_fc(struct mvpp2_port *port,
+ struct mvpp2_bm_pool *pool,
+ bool en)
+{
+ int val, cm3_state;
+ unsigned long flags;
+
+ spin_lock_irqsave(&port->priv->mss_spinlock, flags);
+
+ /* Remove Flow control enable bit to prevent race between FW and Kernel
+ * If Flow control were enabled, it would be re-enabled.
+ */
+ val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG);
+ cm3_state = (val & FLOW_CONTROL_ENABLE_BIT);
+ val &= ~FLOW_CONTROL_ENABLE_BIT;
+ mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val);
+
+ /* Check if BM pool should be enabled/disable */
+ if (en) {
+ /* Set BM pool start and stop thresholds per port */
+ val = mvpp2_cm3_read(port->priv, MSS_BUF_POOL_REG(pool->id));
+ val |= MSS_BUF_POOL_PORT_OFFS(port->id);
+ val &= ~MSS_BUF_POOL_START_MASK;
+ val |= (MSS_THRESHOLD_START << MSS_BUF_POOL_START_OFFS);
+ val &= ~MSS_BUF_POOL_STOP_MASK;
+ val |= MSS_THRESHOLD_STOP;
+ mvpp2_cm3_write(port->priv, MSS_BUF_POOL_REG(pool->id), val);
+ } else {
+ /* Remove BM pool from the port */
+ val = mvpp2_cm3_read(port->priv, MSS_BUF_POOL_REG(pool->id));
+ val &= ~MSS_BUF_POOL_PORT_OFFS(port->id);
+
+ /* Zero BM pool start and stop thresholds to disable pool
+ * flow control if pool empty (not used by any port)
+ */
+ if (!pool->buf_num) {
+ val &= ~MSS_BUF_POOL_START_MASK;
+ val &= ~MSS_BUF_POOL_STOP_MASK;
+ }
+
+ mvpp2_cm3_write(port->priv, MSS_BUF_POOL_REG(pool->id), val);
+ }
+
+ /* Notify Firmware that Flow control config space ready for update */
+ val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG);
+ val |= FLOW_CONTROL_UPDATE_COMMAND_BIT;
+ val |= cm3_state;
+ mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val);
+
+ spin_unlock_irqrestore(&port->priv->mss_spinlock, flags);
+}
+
/* Release buffer to BM */
static inline void mvpp2_bm_pool_put(struct mvpp2_port *port, int pool,
dma_addr_t buf_dma_addr,
@@ -1175,6 +1228,16 @@ static int mvpp2_bm_update_mtu(struct net_device *dev, int mtu)
new_long_pool = MVPP2_BM_LONG;
if (new_long_pool != port->pool_long->id) {
+ if (port->tx_fc) {
+ if (pkt_size > MVPP2_BM_LONG_PKT_SIZE)
+ mvpp2_bm_pool_update_fc(port,
+ port->pool_short,
+ false);
+ else
+ mvpp2_bm_pool_update_fc(port, port->pool_long,
+ false);
+ }
+
/* Remove port from old short & long pool */
port->pool_long = mvpp2_bm_pool_use(port, port->pool_long->id,
port->pool_long->pkt_size);
@@ -1192,6 +1255,25 @@ static int mvpp2_bm_update_mtu(struct net_device *dev, int mtu)
mvpp2_swf_bm_pool_init(port);
mvpp2_set_hw_csum(port, new_long_pool);
+
+ if (port->tx_fc) {
+ if (pkt_size > MVPP2_BM_LONG_PKT_SIZE)
+ mvpp2_bm_pool_update_fc(port, port->pool_long,
+ true);
+ else
+ mvpp2_bm_pool_update_fc(port, port->pool_short,
+ true);
+ }
+
+ /* Update L4 checksum when jumbo enable/disable on port */
+ if (new_long_pool == MVPP2_BM_JUMBO && port->id != 0) {
+ dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);
+ dev->hw_features &= ~(NETIF_F_IP_CSUM |
+ NETIF_F_IPV6_CSUM);
+ } else {
+ dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
+ dev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
+ }
}
out_set:
@@ -6357,6 +6439,7 @@ static void mvpp2_mac_link_up(struct phylink_config *config,
{
struct mvpp2_port *port = mvpp2_phylink_to_port(config);
u32 val;
+ int i;
if (mvpp2_is_xlg(interface)) {
if (!phylink_autoneg_inband(mode)) {
@@ -6407,6 +6490,21 @@ static void mvpp2_mac_link_up(struct phylink_config *config,
val);
}
+ if (port->priv->global_tx_fc) {
+ port->tx_fc = tx_pause;
+ if (tx_pause)
+ mvpp2_rxq_enable_fc(port);
+ else
+ mvpp2_rxq_disable_fc(port);
+ if (port->priv->percpu_pools) {
+ for (i = 0; i < port->nrxqs; i++)
+ mvpp2_bm_pool_update_fc(port, &port->priv->bm_pools[i], tx_pause);
+ } else {
+ mvpp2_bm_pool_update_fc(port, port->pool_long, tx_pause);
+ mvpp2_bm_pool_update_fc(port, port->pool_short, tx_pause);
+ }
+ }
+
mvpp2_port_enable(port);
mvpp2_egress_enable(port);
--
1.9.1
From: Stefan Chulski <[email protected]>
This patch fix GMAC TX flow control autoneg.
Flow control autoneg wrongly were disabled with enabled TX
flow control.
Signed-off-by: Stefan Chulski <[email protected]>
Acked-by: Marcin Wojtas <[email protected]>
---
drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index e646151..883d742 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -6276,7 +6276,7 @@ static void mvpp2_gmac_config(struct mvpp2_port *port, unsigned int mode,
old_ctrl4 = ctrl4 = readl(port->base + MVPP22_GMAC_CTRL_4_REG);
ctrl0 &= ~MVPP2_GMAC_PORT_TYPE_MASK;
- ctrl2 &= ~(MVPP2_GMAC_INBAND_AN_MASK | MVPP2_GMAC_PCS_ENABLE_MASK);
+ ctrl2 &= ~(MVPP2_GMAC_INBAND_AN_MASK | MVPP2_GMAC_PCS_ENABLE_MASK | MVPP2_GMAC_FLOW_CTRL_MASK);
/* Configure port type */
if (phy_interface_mode_is_8023z(state->interface)) {
--
1.9.1
From: Stefan Chulski <[email protected]>
The PP2v23 hardware supports a feature allowing to double the
size of BPPI by decreasing number of pools from 16 to 8.
Increasing of BPPI size protect BM drop from BPPI underrun.
Underrun could occurred due to stress on DDR and as result slow buffer
transition from BPPE to BPPI.
New BPPI threshold recommended by spec is:
BPPI low threshold - 640 buffers
BPPI high threshold - 832 buffers
Supported only in PPv23.
Signed-off-by: Stefan Chulski <[email protected]>
Acked-by: Marcin Wojtas <[email protected]>
---
drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 8 ++++++
drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 26 ++++++++++++++++++++
2 files changed, 34 insertions(+)
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
index 0731dc7..9b525b60 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
@@ -324,6 +324,10 @@
#define MVPP2_BM_HIGH_THRESH_MASK 0x7f0000
#define MVPP2_BM_HIGH_THRESH_VALUE(val) ((val) << \
MVPP2_BM_HIGH_THRESH_OFFS)
+#define MVPP2_BM_BPPI_HIGH_THRESH 0x1E
+#define MVPP2_BM_BPPI_LOW_THRESH 0x1C
+#define MVPP23_BM_BPPI_HIGH_THRESH 0x34
+#define MVPP23_BM_BPPI_LOW_THRESH 0x28
#define MVPP2_BM_INTR_CAUSE_REG(pool) (0x6240 + ((pool) * 4))
#define MVPP2_BM_RELEASED_DELAY_MASK BIT(0)
#define MVPP2_BM_ALLOC_FAILED_MASK BIT(1)
@@ -352,6 +356,10 @@
#define MVPP2_OVERRUN_ETH_DROP 0x7000
#define MVPP2_CLS_ETH_DROP 0x7020
+#define MVPP22_BM_POOL_BASE_ADDR_HIGH_REG 0x6310
+#define MVPP22_BM_POOL_BASE_ADDR_HIGH_MASK 0xff
+#define MVPP23_BM_8POOL_MODE BIT(8)
+
/* Hit counters registers */
#define MVPP2_CTRS_IDX 0x7040
#define MVPP22_CTRS_TX_CTR(port, txq) ((txq) | ((port) << 3) | BIT(7))
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index 90c9265..9226d2f 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -423,6 +423,19 @@ static int mvpp2_bm_pool_create(struct device *dev, struct mvpp2 *priv,
val = mvpp2_read(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id));
val |= MVPP2_BM_START_MASK;
+
+ val &= ~MVPP2_BM_LOW_THRESH_MASK;
+ val &= ~MVPP2_BM_HIGH_THRESH_MASK;
+
+ /* Set 8 Pools BPPI threshold for MVPP23 */
+ if (priv->hw_version == MVPP23) {
+ val |= MVPP2_BM_LOW_THRESH_VALUE(MVPP23_BM_BPPI_LOW_THRESH);
+ val |= MVPP2_BM_HIGH_THRESH_VALUE(MVPP23_BM_BPPI_HIGH_THRESH);
+ } else {
+ val |= MVPP2_BM_LOW_THRESH_VALUE(MVPP2_BM_BPPI_LOW_THRESH);
+ val |= MVPP2_BM_HIGH_THRESH_VALUE(MVPP2_BM_BPPI_HIGH_THRESH);
+ }
+
mvpp2_write(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id), val);
bm_pool->size = size;
@@ -591,6 +604,16 @@ static int mvpp2_bm_pools_init(struct device *dev, struct mvpp2 *priv)
return err;
}
+/* Routine enable PPv23 8 pool mode */
+static void mvpp23_bm_set_8pool_mode(struct mvpp2 *priv)
+{
+ int val;
+
+ val = mvpp2_read(priv, MVPP22_BM_POOL_BASE_ADDR_HIGH_REG);
+ val |= MVPP23_BM_8POOL_MODE;
+ mvpp2_write(priv, MVPP22_BM_POOL_BASE_ADDR_HIGH_REG, val);
+}
+
static int mvpp2_bm_init(struct device *dev, struct mvpp2 *priv)
{
enum dma_data_direction dma_dir = DMA_FROM_DEVICE;
@@ -644,6 +667,9 @@ static int mvpp2_bm_init(struct device *dev, struct mvpp2 *priv)
if (!priv->bm_pools)
return -ENOMEM;
+ if (priv->hw_version == MVPP23)
+ mvpp23_bm_set_8pool_mode(priv);
+
err = mvpp2_bm_pools_init(dev, priv);
if (err < 0)
return err;
--
1.9.1
From: Stefan Chulski <[email protected]>
New FIFO flow control feature was added in PPv23.
PPv2 FIFO polled by HW and trigger pause frame if FIFO
fill level is below threshold.
FIFO HW flow control enabled with CM3 RXQ&BM flow
control with ethtool.
Current FIFO thresholds is:
9KB for port with maximum speed 10Gb/s port
4KB for port with maximum speed 5Gb/s port
2KB for port with maximum speed 1Gb/s port
Signed-off-by: Stefan Chulski <[email protected]>
Acked-by: Marcin Wojtas <[email protected]>
---
drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 15 ++++++
drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 53 ++++++++++++++++++++
2 files changed, 68 insertions(+)
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
index 9b525b60..b61a1ba 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
@@ -770,6 +770,18 @@
#define MVPP2_TX_FIFO_THRESHOLD(kb) \
((kb) * 1024 - MVPP2_TX_FIFO_THRESHOLD_MIN)
+/* RX FIFO threshold in 1KB granularity */
+#define MVPP23_PORT0_FIFO_TRSH (9 * 1024)
+#define MVPP23_PORT1_FIFO_TRSH (4 * 1024)
+#define MVPP23_PORT2_FIFO_TRSH (2 * 1024)
+
+/* RX Flow Control Registers */
+#define MVPP2_RX_FC_REG(port) (0x150 + 4 * (port))
+#define MVPP2_RX_FC_EN BIT(24)
+#define MVPP2_RX_FC_TRSH_OFFS 16
+#define MVPP2_RX_FC_TRSH_MASK (0xFF << MVPP2_RX_FC_TRSH_OFFS)
+#define MVPP2_RX_FC_TRSH_UNIT 256
+
/* MSS Flow control */
#define MSS_FC_COM_REG 0
#define FLOW_CONTROL_ENABLE_BIT BIT(0)
@@ -1498,6 +1510,8 @@ struct mvpp2_bm_pool {
void mvpp2_dbgfs_cleanup(struct mvpp2 *priv);
+void mvpp23_rx_fifo_fc_en(struct mvpp2 *priv, int port, bool en);
+
#ifdef CONFIG_MVPP2_PTP
int mvpp22_tai_probe(struct device *dev, struct mvpp2 *priv);
void mvpp22_tai_tstamp(struct mvpp2_tai *tai, u32 tstamp,
@@ -1530,4 +1544,5 @@ static inline bool mvpp22_rx_hwtstamping(struct mvpp2_port *port)
{
return IS_ENABLED(CONFIG_MVPP2_PTP) && port->rx_hwtstamp;
}
+
#endif
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index 9226d2f..e646151 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -6529,6 +6529,8 @@ static void mvpp2_mac_link_up(struct phylink_config *config,
mvpp2_bm_pool_update_fc(port, port->pool_long, tx_pause);
mvpp2_bm_pool_update_fc(port, port->pool_short, tx_pause);
}
+ if (port->priv->hw_version == MVPP23)
+ mvpp23_rx_fifo_fc_en(port->priv, port->id, tx_pause);
}
mvpp2_port_enable(port);
@@ -6997,6 +6999,55 @@ static void mvpp22_rx_fifo_init(struct mvpp2 *priv)
mvpp2_write(priv, MVPP2_RX_FIFO_INIT_REG, 0x1);
}
+/* Configure Rx FIFO Flow control thresholds */
+static void mvpp23_rx_fifo_fc_set_tresh(struct mvpp2 *priv)
+{
+ int port, val;
+
+ /* Port 0: maximum speed -10Gb/s port
+ * required by spec RX FIFO threshold 9KB
+ * Port 1: maximum speed -5Gb/s port
+ * required by spec RX FIFO threshold 4KB
+ * Port 2: maximum speed -1Gb/s port
+ * required by spec RX FIFO threshold 2KB
+ */
+
+ /* Without loopback port */
+ for (port = 0; port < (MVPP2_MAX_PORTS - 1); port++) {
+ if (port == 0) {
+ val = (MVPP23_PORT0_FIFO_TRSH / MVPP2_RX_FC_TRSH_UNIT)
+ << MVPP2_RX_FC_TRSH_OFFS;
+ val &= MVPP2_RX_FC_TRSH_MASK;
+ mvpp2_write(priv, MVPP2_RX_FC_REG(port), val);
+ } else if (port == 1) {
+ val = (MVPP23_PORT1_FIFO_TRSH / MVPP2_RX_FC_TRSH_UNIT)
+ << MVPP2_RX_FC_TRSH_OFFS;
+ val &= MVPP2_RX_FC_TRSH_MASK;
+ mvpp2_write(priv, MVPP2_RX_FC_REG(port), val);
+ } else {
+ val = (MVPP23_PORT2_FIFO_TRSH / MVPP2_RX_FC_TRSH_UNIT)
+ << MVPP2_RX_FC_TRSH_OFFS;
+ val &= MVPP2_RX_FC_TRSH_MASK;
+ mvpp2_write(priv, MVPP2_RX_FC_REG(port), val);
+ }
+ }
+}
+
+/* Configure Rx FIFO Flow control thresholds */
+void mvpp23_rx_fifo_fc_en(struct mvpp2 *priv, int port, bool en)
+{
+ int val;
+
+ val = mvpp2_read(priv, MVPP2_RX_FC_REG(port));
+
+ if (en)
+ val |= MVPP2_RX_FC_EN;
+ else
+ val &= ~MVPP2_RX_FC_EN;
+
+ mvpp2_write(priv, MVPP2_RX_FC_REG(port), val);
+}
+
static void mvpp22_tx_fifo_set_hw(struct mvpp2 *priv, int port, int size)
{
int threshold = MVPP2_TX_FIFO_THRESHOLD(size);
@@ -7148,6 +7199,8 @@ static int mvpp2_init(struct platform_device *pdev, struct mvpp2 *priv)
} else {
mvpp22_rx_fifo_init(priv);
mvpp22_tx_fifo_init(priv);
+ if (priv->hw_version == MVPP23)
+ mvpp23_rx_fifo_fc_set_tresh(priv);
}
if (priv->hw_version == MVPP21)
--
1.9.1
From: Stefan Chulski <[email protected]>
This patch adds RXQ flow control configurations.
Flow control disabled by default.
Minimum ring size limited to 1024 descriptors.
Signed-off-by: Stefan Chulski <[email protected]>
Acked-by: Marcin Wojtas <[email protected]>
---
drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 35 +++++-
drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 116 ++++++++++++++++++++
2 files changed, 150 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
index 8945fb9..0010a3e9 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
@@ -765,9 +765,36 @@
/* MSS Flow control */
#define MSS_FC_COM_REG 0
#define FLOW_CONTROL_ENABLE_BIT BIT(0)
+#define FLOW_CONTROL_UPDATE_COMMAND_BIT BIT(31)
#define FC_QUANTA 0xFFFF
#define FC_CLK_DIVIDER 100
-#define MSS_THRESHOLD_STOP 768
+
+#define MSS_RXQ_TRESH_BASE 0x200
+#define MSS_RXQ_TRESH_OFFS 4
+#define MSS_RXQ_TRESH_REG(q, fq) (MSS_RXQ_TRESH_BASE + (((q) + (fq)) \
+ * MSS_RXQ_TRESH_OFFS))
+
+#define MSS_RXQ_TRESH_START_MASK 0xFFFF
+#define MSS_RXQ_TRESH_STOP_MASK (0xFFFF << MSS_RXQ_TRESH_STOP_OFFS)
+#define MSS_RXQ_TRESH_STOP_OFFS 16
+
+#define MSS_RXQ_ASS_BASE 0x80
+#define MSS_RXQ_ASS_OFFS 4
+#define MSS_RXQ_ASS_PER_REG 4
+#define MSS_RXQ_ASS_PER_OFFS 8
+#define MSS_RXQ_ASS_PORTID_OFFS 0
+#define MSS_RXQ_ASS_PORTID_MASK 0x3
+#define MSS_RXQ_ASS_HOSTID_OFFS 2
+#define MSS_RXQ_ASS_HOSTID_MASK 0x3F
+
+#define MSS_RXQ_ASS_Q_BASE(q, fq) ((((q) + (fq)) % MSS_RXQ_ASS_PER_REG) \
+ * MSS_RXQ_ASS_PER_OFFS)
+#define MSS_RXQ_ASS_PQ_BASE(q, fq) ((((q) + (fq)) / MSS_RXQ_ASS_PER_REG) \
+ * MSS_RXQ_ASS_OFFS)
+#define MSS_RXQ_ASS_REG(q, fq) (MSS_RXQ_ASS_BASE + MSS_RXQ_ASS_PQ_BASE(q, fq))
+
+#define MSS_THRESHOLD_STOP 768
+#define MSS_THRESHOLD_START 1024
/* RX buffer constants */
#define MVPP2_SKB_SHINFO_SIZE \
@@ -1022,6 +1049,9 @@ struct mvpp2 {
/* Global TX Flow Control config */
bool global_tx_fc;
+
+ /* Spinlocks for CM3 shared memory configuration */
+ spinlock_t mss_spinlock;
};
struct mvpp2_pcpu_stats {
@@ -1184,6 +1214,9 @@ struct mvpp2_port {
bool rx_hwtstamp;
enum hwtstamp_tx_types tx_hwtstamp_type;
struct mvpp2_hwtstamp_queue tx_hwtstamp_queue[2];
+
+ /* Firmware TX flow control */
+ bool tx_fc;
};
/* The mvpp2_tx_desc and mvpp2_rx_desc structures describe the
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index 027101b..f1770e5 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -741,6 +741,110 @@ static void *mvpp2_buf_alloc(struct mvpp2_port *port,
return data;
}
+/* Routine enable flow control for RXQs condition */
+static void mvpp2_rxq_enable_fc(struct mvpp2_port *port)
+{
+ int val, cm3_state, host_id, q;
+ int fq = port->first_rxq;
+ unsigned long flags;
+
+ spin_lock_irqsave(&port->priv->mss_spinlock, flags);
+
+ /* Remove Flow control enable bit to prevent race between FW and Kernel
+ * If Flow control was enabled, it would be re-enabled.
+ */
+ val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG);
+ cm3_state = (val & FLOW_CONTROL_ENABLE_BIT);
+ val &= ~FLOW_CONTROL_ENABLE_BIT;
+ mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val);
+
+ /* Set same Flow control for all RXQs */
+ for (q = 0; q < port->nrxqs; q++) {
+ /* Set stop and start Flow control RXQ thresholds */
+ val = MSS_THRESHOLD_START;
+ val |= (MSS_THRESHOLD_STOP << MSS_RXQ_TRESH_STOP_OFFS);
+ mvpp2_cm3_write(port->priv, MSS_RXQ_TRESH_REG(q, fq), val);
+
+ val = mvpp2_cm3_read(port->priv, MSS_RXQ_ASS_REG(q, fq));
+ /* Set RXQ port ID */
+ val &= ~(MSS_RXQ_ASS_PORTID_MASK << MSS_RXQ_ASS_Q_BASE(q, fq));
+ val |= (port->id << MSS_RXQ_ASS_Q_BASE(q, fq));
+ val &= ~(MSS_RXQ_ASS_HOSTID_MASK << (MSS_RXQ_ASS_Q_BASE(q, fq)
+ + MSS_RXQ_ASS_HOSTID_OFFS));
+
+ /* Calculate RXQ host ID:
+ * In Single queue mode: Host ID equal to Host ID used for
+ * shared RX interrupt
+ * In Multi queue mode: Host ID equal to number of
+ * RXQ ID / number of CoS queues
+ * In Single resource mode: Host ID always equal to 0
+ */
+ if (queue_mode == MVPP2_QDIST_SINGLE_MODE)
+ host_id = port->nqvecs;
+ else if (queue_mode == MVPP2_QDIST_MULTI_MODE)
+ host_id = q;
+ else
+ host_id = 0;
+
+ /* Set RXQ host ID */
+ val |= (host_id << (MSS_RXQ_ASS_Q_BASE(q, fq)
+ + MSS_RXQ_ASS_HOSTID_OFFS));
+
+ mvpp2_cm3_write(port->priv, MSS_RXQ_ASS_REG(q, fq), val);
+ }
+
+ /* Notify Firmware that Flow control config space ready for update */
+ val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG);
+ val |= FLOW_CONTROL_UPDATE_COMMAND_BIT;
+ val |= cm3_state;
+ mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val);
+
+ spin_unlock_irqrestore(&port->priv->mss_spinlock, flags);
+}
+
+/* Routine disable flow control for RXQs condition */
+static void mvpp2_rxq_disable_fc(struct mvpp2_port *port)
+{
+ int val, cm3_state, q;
+ unsigned long flags;
+ int fq = port->first_rxq;
+
+ spin_lock_irqsave(&port->priv->mss_spinlock, flags);
+
+ /* Remove Flow control enable bit to prevent race between FW and Kernel
+ * If Flow control was enabled, it would be re-enabled.
+ */
+ val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG);
+ cm3_state = (val & FLOW_CONTROL_ENABLE_BIT);
+ val &= ~FLOW_CONTROL_ENABLE_BIT;
+ mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val);
+
+ /* Disable Flow control for all RXQs */
+ for (q = 0; q < port->nrxqs; q++) {
+ /* Set threshold 0 to disable Flow control */
+ val = 0;
+ val |= (0 << MSS_RXQ_TRESH_STOP_OFFS);
+ mvpp2_cm3_write(port->priv, MSS_RXQ_TRESH_REG(q, fq), val);
+
+ val = mvpp2_cm3_read(port->priv, MSS_RXQ_ASS_REG(q, fq));
+
+ val &= ~(MSS_RXQ_ASS_PORTID_MASK << MSS_RXQ_ASS_Q_BASE(q, fq));
+
+ val &= ~(MSS_RXQ_ASS_HOSTID_MASK << (MSS_RXQ_ASS_Q_BASE(q, fq)
+ + MSS_RXQ_ASS_HOSTID_OFFS));
+
+ mvpp2_cm3_write(port->priv, MSS_RXQ_ASS_REG(q, fq), val);
+ }
+
+ /* Notify Firmware that Flow control config space ready for update */
+ val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG);
+ val |= FLOW_CONTROL_UPDATE_COMMAND_BIT;
+ val |= cm3_state;
+ mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val);
+
+ spin_unlock_irqrestore(&port->priv->mss_spinlock, flags);
+}
+
/* Release buffer to BM */
static inline void mvpp2_bm_pool_put(struct mvpp2_port *port, int pool,
dma_addr_t buf_dma_addr,
@@ -3005,6 +3109,9 @@ static void mvpp2_cleanup_rxqs(struct mvpp2_port *port)
for (queue = 0; queue < port->nrxqs; queue++)
mvpp2_rxq_deinit(port, port->rxqs[queue]);
+
+ if (port->tx_fc)
+ mvpp2_rxq_disable_fc(port);
}
/* Init all Rx queues for port */
@@ -3017,6 +3124,10 @@ static int mvpp2_setup_rxqs(struct mvpp2_port *port)
if (err)
goto err_cleanup;
}
+
+ if (port->tx_fc)
+ mvpp2_rxq_enable_fc(port);
+
return 0;
err_cleanup:
@@ -4316,6 +4427,8 @@ static int mvpp2_check_ringparam_valid(struct net_device *dev,
if (ring->rx_pending > MVPP2_MAX_RXD_MAX)
new_rx_pending = MVPP2_MAX_RXD_MAX;
+ else if (ring->rx_pending < MSS_THRESHOLD_START)
+ new_rx_pending = MSS_THRESHOLD_START;
else if (!IS_ALIGNED(ring->rx_pending, 16))
new_rx_pending = ALIGN(ring->rx_pending, 16);
@@ -7148,6 +7261,9 @@ static int mvpp2_probe(struct platform_device *pdev)
priv->hw_version = MVPP23;
}
+ /* Init mss lock */
+ spin_lock_init(&priv->mss_spinlock);
+
/* Initialize network controller */
err = mvpp2_init(pdev, priv);
if (err < 0) {
--
1.9.1
From: Stefan Chulski <[email protected]>
Patch check that TX FC firmware is running in CM3.
If not, global TX FC would be disabled.
Signed-off-by: Stefan Chulski <[email protected]>
Acked-by: Marcin Wojtas <[email protected]>
---
drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 1 +
drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 39 ++++++++++++++++----
2 files changed, 33 insertions(+), 7 deletions(-)
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
index b61a1ba..da87152 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
@@ -828,6 +828,7 @@
#define MSS_THRESHOLD_STOP 768
#define MSS_THRESHOLD_START 1024
+#define MSS_FC_MAX_TIMEOUT 5000
/* RX buffer constants */
#define MVPP2_SKB_SHINFO_SIZE \
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index 883d742..4ff195a 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -924,6 +924,34 @@ static void mvpp2_bm_pool_update_fc(struct mvpp2_port *port,
spin_unlock_irqrestore(&port->priv->mss_spinlock, flags);
}
+static int mvpp2_enable_global_fc(struct mvpp2 *priv)
+{
+ int val, timeout = 0;
+
+ /* Enable global flow control. In this stage global
+ * flow control enabled, but still disabled per port.
+ */
+ val = mvpp2_cm3_read(priv, MSS_FC_COM_REG);
+ val |= FLOW_CONTROL_ENABLE_BIT;
+ mvpp2_cm3_write(priv, MSS_FC_COM_REG, val);
+
+ /* Check if Firmware running and disable FC if not*/
+ val |= FLOW_CONTROL_UPDATE_COMMAND_BIT;
+ mvpp2_cm3_write(priv, MSS_FC_COM_REG, val);
+
+ while (timeout < MSS_FC_MAX_TIMEOUT) {
+ val = mvpp2_cm3_read(priv, MSS_FC_COM_REG);
+
+ if (!(val & FLOW_CONTROL_UPDATE_COMMAND_BIT))
+ return 0;
+ usleep_range(10, 20);
+ timeout++;
+ }
+
+ priv->global_tx_fc = false;
+ return -EOPNOTSUPP;
+}
+
/* Release buffer to BM */
static inline void mvpp2_bm_pool_put(struct mvpp2_port *port, int pool,
dma_addr_t buf_dma_addr,
@@ -7256,7 +7284,7 @@ static int mvpp2_probe(struct platform_device *pdev)
struct resource *res;
void __iomem *base;
int i, shared;
- int err, val;
+ int err;
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
@@ -7480,13 +7508,10 @@ static int mvpp2_probe(struct platform_device *pdev)
goto err_port_probe;
}
- /* Enable global flow control. In this stage global
- * flow control enabled, but still disabled per port.
- */
if (priv->global_tx_fc && priv->hw_version != MVPP21) {
- val = mvpp2_cm3_read(priv, MSS_FC_COM_REG);
- val |= FLOW_CONTROL_ENABLE_BIT;
- mvpp2_cm3_write(priv, MSS_FC_COM_REG, val);
+ err = mvpp2_enable_global_fc(priv);
+ if (err)
+ dev_warn(&pdev->dev, "Minimum of CM3 firmware 18.09 and chip revision B0 required for flow control\n");
}
mvpp2_dbgfs_init(priv, pdev->name);
--
1.9.1
From: Stefan Chulski <[email protected]>
Currently we have PP2v1 and PP2v2 hw-versions, with some different
handlers depending upon condition hw_version = MVPP21/MVPP22.
In a future there will be also PP2v3. Let's use now the generic
"if equal/notEqual MVPP21" for all cases instead of "if MVPP22".
This patch does not change any functionality.
It is not intended to introduce PP2v3.
It just modifies MVPP21/MVPP22 check-condition
bringing it to generic and unified form correct for new-code
introducing and PP2v3 net-next generation.
Signed-off-by: Stefan Chulski <[email protected]>
Acked-by: Marcin Wojtas <[email protected]>
---
drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 38 ++++++++++----------
1 file changed, 19 insertions(+), 19 deletions(-)
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index eec3796..17cd161 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -319,7 +319,7 @@ static int mvpp2_get_nrxqs(struct mvpp2 *priv)
{
unsigned int nrxqs;
- if (priv->hw_version == MVPP22 && queue_mode == MVPP2_QDIST_SINGLE_MODE)
+ if (priv->hw_version != MVPP21 && queue_mode == MVPP2_QDIST_SINGLE_MODE)
return 1;
/* According to the PPv2.2 datasheet and our experiments on
@@ -446,7 +446,7 @@ static void mvpp2_bm_bufs_get_addrs(struct device *dev, struct mvpp2 *priv,
MVPP2_BM_PHY_ALLOC_REG(bm_pool->id));
*phys_addr = mvpp2_thread_read(priv, thread, MVPP2_BM_VIRT_ALLOC_REG);
- if (priv->hw_version == MVPP22) {
+ if (priv->hw_version != MVPP21) {
u32 val;
u32 dma_addr_highbits, phys_addr_highbits;
@@ -742,7 +742,7 @@ static inline void mvpp2_bm_pool_put(struct mvpp2_port *port, int pool,
if (test_bit(thread, &port->priv->lock_map))
spin_lock_irqsave(&port->bm_lock[thread], flags);
- if (port->priv->hw_version == MVPP22) {
+ if (port->priv->hw_version != MVPP21) {
u32 val = 0;
if (sizeof(dma_addr_t) == 8)
@@ -1172,7 +1172,7 @@ static void mvpp2_interrupts_unmask(void *arg)
u32 val;
int i;
- if (port->priv->hw_version != MVPP22)
+ if (port->priv->hw_version == MVPP21)
return;
if (mask)
@@ -1199,7 +1199,7 @@ static bool mvpp2_port_supports_xlg(struct mvpp2_port *port)
static bool mvpp2_port_supports_rgmii(struct mvpp2_port *port)
{
- return !(port->priv->hw_version == MVPP22 && port->gop_id == 0);
+ return !(port->priv->hw_version != MVPP21 && port->gop_id == 0);
}
/* Port configuration routines */
@@ -1817,7 +1817,7 @@ static void mvpp2_mac_reset_assert(struct mvpp2_port *port)
MVPP2_GMAC_PORT_RESET_MASK;
writel(val, port->base + MVPP2_GMAC_CTRL_2_REG);
- if (port->priv->hw_version == MVPP22 && port->gop_id == 0) {
+ if (port->priv->hw_version != MVPP21 && port->gop_id == 0) {
val = readl(port->base + MVPP22_XLG_CTRL0_REG) &
~MVPP22_XLG_CTRL0_MAC_RESET_DIS;
writel(val, port->base + MVPP22_XLG_CTRL0_REG);
@@ -1830,7 +1830,7 @@ static void mvpp22_pcs_reset_assert(struct mvpp2_port *port)
void __iomem *mpcs, *xpcs;
u32 val;
- if (port->priv->hw_version != MVPP22 || port->gop_id != 0)
+ if (port->priv->hw_version == MVPP21 || port->gop_id != 0)
return;
mpcs = priv->iface_base + MVPP22_MPCS_BASE(port->gop_id);
@@ -1851,7 +1851,7 @@ static void mvpp22_pcs_reset_deassert(struct mvpp2_port *port)
void __iomem *mpcs, *xpcs;
u32 val;
- if (port->priv->hw_version != MVPP22 || port->gop_id != 0)
+ if (port->priv->hw_version == MVPP21 || port->gop_id != 0)
return;
mpcs = priv->iface_base + MVPP22_MPCS_BASE(port->gop_id);
@@ -4188,7 +4188,7 @@ static void mvpp2_start_dev(struct mvpp2_port *port)
/* Enable interrupts on all threads */
mvpp2_interrupts_enable(port);
- if (port->priv->hw_version == MVPP22)
+ if (port->priv->hw_version != MVPP21)
mvpp22_mode_reconfigure(port);
if (port->phylink) {
@@ -4404,7 +4404,7 @@ static int mvpp2_open(struct net_device *dev)
valid = true;
}
- if (priv->hw_version == MVPP22 && port->port_irq) {
+ if (priv->hw_version != MVPP21 && port->port_irq) {
err = request_irq(port->port_irq, mvpp2_port_isr, 0,
dev->name, port);
if (err) {
@@ -6052,7 +6052,7 @@ static int mvpp2__mac_prepare(struct phylink_config *config, unsigned int mode,
MVPP2_GMAC_PORT_RESET_MASK,
MVPP2_GMAC_PORT_RESET_MASK);
- if (port->priv->hw_version == MVPP22) {
+ if (port->priv->hw_version != MVPP21) {
mvpp22_gop_mask_irq(port);
phy_power_off(port->comphy);
@@ -6106,7 +6106,7 @@ static int mvpp2_mac_finish(struct phylink_config *config, unsigned int mode,
{
struct mvpp2_port *port = mvpp2_phylink_to_port(config);
- if (port->priv->hw_version == MVPP22 &&
+ if (port->priv->hw_version != MVPP21 &&
port->phy_interface != interface) {
port->phy_interface = interface;
@@ -6786,7 +6786,7 @@ static int mvpp2_init(struct platform_device *pdev, struct mvpp2 *priv)
if (dram_target_info)
mvpp2_conf_mbus_windows(dram_target_info, priv);
- if (priv->hw_version == MVPP22)
+ if (priv->hw_version != MVPP21)
mvpp2_axi_init(priv);
/* Disable HW PHY polling */
@@ -6930,7 +6930,7 @@ static int mvpp2_probe(struct platform_device *pdev)
dev_warn(&pdev->dev, "Fail to alloc CM3 SRAM\n");
}
- if (priv->hw_version == MVPP22 && dev_of_node(&pdev->dev)) {
+ if (priv->hw_version != MVPP21 && dev_of_node(&pdev->dev)) {
priv->sysctrl_base =
syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
"marvell,system-controller");
@@ -6943,7 +6943,7 @@ static int mvpp2_probe(struct platform_device *pdev)
priv->sysctrl_base = NULL;
}
- if (priv->hw_version == MVPP22 &&
+ if (priv->hw_version != MVPP21 &&
mvpp2_get_nrxqs(priv) * 2 <= MVPP2_BM_MAX_POOLS)
priv->percpu_pools = 1;
@@ -6988,7 +6988,7 @@ static int mvpp2_probe(struct platform_device *pdev)
if (err < 0)
goto err_pp_clk;
- if (priv->hw_version == MVPP22) {
+ if (priv->hw_version != MVPP21) {
priv->mg_clk = devm_clk_get(&pdev->dev, "mg_clk");
if (IS_ERR(priv->mg_clk)) {
err = PTR_ERR(priv->mg_clk);
@@ -7029,7 +7029,7 @@ static int mvpp2_probe(struct platform_device *pdev)
return -EINVAL;
}
- if (priv->hw_version == MVPP22) {
+ if (priv->hw_version != MVPP21) {
err = dma_set_mask(&pdev->dev, MVPP2_DESC_DMA_MASK);
if (err)
goto err_axi_clk;
@@ -7104,10 +7104,10 @@ static int mvpp2_probe(struct platform_device *pdev)
clk_disable_unprepare(priv->axi_clk);
err_mg_core_clk:
- if (priv->hw_version == MVPP22)
+ if (priv->hw_version != MVPP21)
clk_disable_unprepare(priv->mg_core_clk);
err_mg_clk:
- if (priv->hw_version == MVPP22)
+ if (priv->hw_version != MVPP21)
clk_disable_unprepare(priv->mg_clk);
err_gop_clk:
clk_disable_unprepare(priv->gop_clk);
--
1.9.1
On Thu, Feb 11, 2021 at 12:48:48PM +0200, [email protected] wrote:
> From: Stefan Chulski <[email protected]>
>
> Patch adds CM3 address space and PPv2.3 description.
>
> Signed-off-by: Stefan Chulski <[email protected]>
> Acked-by: Marcin Wojtas <[email protected]>
It seems this is missing the ack that you got from Rob in your previous
posting. Your changelog says that only the module parameter was
removed, so I guess nothing changed in this patch.
Please wait to see if there are further comments before posting another
revision of this series.
Thanks.
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On Thu, Feb 11, 2021 at 12:48:50PM +0200, [email protected] wrote:
> +static int mvpp2_get_sram(struct platform_device *pdev,
> + struct mvpp2 *priv)
> +{
> + struct resource *res;
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
> + if (!res) {
> + if (has_acpi_companion(&pdev->dev))
> + dev_warn(&pdev->dev, "ACPI is too old, Flow control not supported\n");
> + else
> + dev_warn(&pdev->dev, "DT is too old, Flow control not supported\n");
> + return 0;
> + }
> +
> + priv->cm3_base = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR(priv->cm3_base))
> + return PTR_ERR(priv->cm3_base);
> +
> + return 0;
You can clean this up to use:
return PTR_ERR_OR_ZERO(priv->cm3_base);
> +
> + /* Map CM3 SRAM */
> + err = mvpp2_get_sram(pdev, priv);
> + if (err)
> + dev_warn(&pdev->dev, "Fail to alloc CM3 SRAM\n");
It looks to me like mvpp2_get_sram() only fails if we are unable to
_map_ the CM3 SRAM. We are no longer allocating anything from it, so
I think this message needs to be updated.
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On Thu, Feb 11, 2021 at 12:48:51PM +0200, [email protected] wrote:
> @@ -1199,7 +1199,7 @@ static bool mvpp2_port_supports_xlg(struct mvpp2_port *port)
>
> static bool mvpp2_port_supports_rgmii(struct mvpp2_port *port)
> {
> - return !(port->priv->hw_version == MVPP22 && port->gop_id == 0);
> + return !(port->priv->hw_version != MVPP21 && port->gop_id == 0);
I'm still very much of the opinion (as raised several revisions back)
that using > MVPP21 or >= MVPP22 would be a lot better - especially
when we have situations like this. Having negatives within negatives
does not help readability.
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On Thu, Feb 11, 2021 at 12:48:53PM +0200, [email protected] wrote:
> From: Stefan Chulski <[email protected]>
>
> BM pool and RXQ size increased to support Firmware Flow Control.
> Minimum depletion thresholds to support FC are 1024 buffers.
> BM pool size increased to 2048 to have some 1024 buffers
> space between depletion thresholds and BM pool size.
>
> Jumbo frames require a 9888B buffer, so memory requirements
> for data buffers increased from 7MB to 24MB.
>
> Signed-off-by: Stefan Chulski <[email protected]>
> Acked-by: Marcin Wojtas <[email protected]>
Reviewed-by: Russell King <[email protected]>
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> On Thu, Feb 11, 2021 at 12:48:51PM +0200, [email protected] wrote:
> > @@ -1199,7 +1199,7 @@ static bool mvpp2_port_supports_xlg(struct
> > mvpp2_port *port)
> >
> > static bool mvpp2_port_supports_rgmii(struct mvpp2_port *port) {
> > - return !(port->priv->hw_version == MVPP22 && port->gop_id == 0);
> > + return !(port->priv->hw_version != MVPP21 && port->gop_id == 0);
>
> I'm still very much of the opinion (as raised several revisions back) that using
> > MVPP21 or >= MVPP22 would be a lot better - especially when we have
> situations like this. Having negatives within negatives does not help
> readability.
Ok, I would update in next series.
Thanks,
Stefan
On Thu, Feb 11, 2021 at 12:48:52PM +0200, [email protected] wrote:
> From: Stefan Chulski <[email protected]>
>
> This patch add PPv23 version definition.
> PPv23 is new packet processor in CP115.
> Everything that supported by PPv22, also supported by PPv23.
> No functional changes in this stage.
>
> Signed-off-by: Stefan Chulski <[email protected]>
> Acked-by: Marcin Wojtas <[email protected]>
Reviewed-by: Russell King <[email protected]>
> @@ -7049,6 +7049,11 @@ static int mvpp2_probe(struct platform_device *pdev)
> priv->port_map |= BIT(i);
> }
>
> + if (priv->hw_version != MVPP21) {
> + if (mvpp2_read(priv, MVPP2_VER_ID_REG) == MVPP2_VER_PP23)
> + priv->hw_version = MVPP23;
> + }
> +
The only minor comment I have on this is... the formatting of the
above. Wouldn't:
if (priv->hw_version >= MVPP22 &&
mvpp2_read(priv, MVPP2_VER_ID_REG) == MVPP2_VER_PP23)
priv->hw_version = MVPP23;
read better?
Do we need to even check priv->hw_version here? Isn't this register
implemented in PPv2.1 where it contains the value zero?
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> ----------------------------------------------------------------------
> On Thu, Feb 11, 2021 at 12:48:52PM +0200, [email protected] wrote:
> > From: Stefan Chulski <[email protected]>
> >
> > This patch add PPv23 version definition.
> > PPv23 is new packet processor in CP115.
> > Everything that supported by PPv22, also supported by PPv23.
> > No functional changes in this stage.
> >
> > Signed-off-by: Stefan Chulski <[email protected]>
> > Acked-by: Marcin Wojtas <[email protected]>
>
> Reviewed-by: Russell King <[email protected]>
>
> > @@ -7049,6 +7049,11 @@ static int mvpp2_probe(struct platform_device
> *pdev)
> > priv->port_map |= BIT(i);
> > }
> >
> > + if (priv->hw_version != MVPP21) {
> > + if (mvpp2_read(priv, MVPP2_VER_ID_REG) ==
> MVPP2_VER_PP23)
> > + priv->hw_version = MVPP23;
> > + }
> > +
>
> The only minor comment I have on this is... the formatting of the above.
> Wouldn't:
>
> if (priv->hw_version >= MVPP22 &&
> mvpp2_read(priv, MVPP2_VER_ID_REG) == MVPP2_VER_PP23)
> priv->hw_version = MVPP23;
>
> read better?
>
> Do we need to even check priv->hw_version here? Isn't this register
> implemented in PPv2.1 where it contains the value zero?
Yes, we can just:
if (mvpp2_read(priv, MVPP2_VER_ID_REG) == MVPP2_VER_PP23)
priv->hw_version = MVPP23;
Thanks,
Stefan.
On Thu, Feb 11, 2021 at 12:48:54PM +0200, [email protected] wrote:
> @@ -751,6 +760,10 @@
> #define MVPP2_TX_FIFO_THRESHOLD(kb) \
> ((kb) * 1024 - MVPP2_TX_FIFO_THRESHOLD_MIN)
>
> +/* MSS Flow control */
> +#define FC_QUANTA 0xFFFF
> +#define FC_CLK_DIVIDER 100
You later change the number of tabs for these definitions in a later
patch. Would it be better to start having the correct number of tabs?
> +
> /* RX buffer constants */
> #define MVPP2_SKB_SHINFO_SIZE \
> SKB_DATA_ALIGN(sizeof(struct skb_shared_info))
> diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> index 5730900..761f745 100644
> --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> @@ -1280,6 +1280,49 @@ static void mvpp22_gop_init_10gkr(struct mvpp2_port *port)
> writel(val, mpcs + MVPP22_MPCS_CLK_RESET);
> }
>
> +static void mvpp22_gop_fca_enable_periodic(struct mvpp2_port *port, bool en)
> +{
> + struct mvpp2 *priv = port->priv;
> + void __iomem *fca = priv->iface_base + MVPP22_FCA_BASE(port->gop_id);
> + u32 val;
net likes to have reverse christmas tree variables. I think you should
clean this up. However...
> +
> + val = readl(fca + MVPP22_FCA_CONTROL_REG);
> + val &= ~MVPP22_FCA_ENABLE_PERIODIC;
> + if (en)
> + val |= MVPP22_FCA_ENABLE_PERIODIC;
> + writel(val, fca + MVPP22_FCA_CONTROL_REG);
if (en)
val = MVPP22_FCA_ENABLE_PERIODIC;
else
val = 0;
mvpp2_modify(priv->iface_base + MVPP22_FCA_BASE(port->gop_id) +
MVPP22_FCA_CONTROL_REG, MVPP22_FCA_ENABLE_PERIODIC, val);
avoids the need for "fca".
> +}
> +
> +static void mvpp22_gop_fca_set_timer(struct mvpp2_port *port, u32 timer)
> +{
> + struct mvpp2 *priv = port->priv;
> + void __iomem *fca = priv->iface_base + MVPP22_FCA_BASE(port->gop_id);
> + u32 lsb, msb;
Same reverse christmas tree issue here.
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On Thu, Feb 11, 2021 at 12:48:55PM +0200, [email protected] wrote:
> diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> index 761f745..8b4073c 100644
> --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> @@ -1133,14 +1133,19 @@ static inline void mvpp2_qvec_interrupt_disable(struct mvpp2_queue_vector *qvec)
> static void mvpp2_interrupts_mask(void *arg)
> {
> struct mvpp2_port *port = arg;
> + int cpu = smp_processor_id();
> + u32 thread;
>
> /* If the thread isn't used, don't do anything */
> - if (smp_processor_id() > port->priv->nthreads)
> + if (cpu > port->priv->nthreads)
> return;
What happened to a patch fixing this? Did I miss it? Was it submitted
independently to the net tree?
> @@ -1150,20 +1155,25 @@ static void mvpp2_interrupts_mask(void *arg)
> static void mvpp2_interrupts_unmask(void *arg)
> {
> struct mvpp2_port *port = arg;
> - u32 val;
> + int cpu = smp_processor_id();
> + u32 val, thread;
>
> /* If the thread isn't used, don't do anything */
> - if (smp_processor_id() > port->priv->nthreads)
> + if (cpu > port->priv->nthreads)
> return;
Ditto.
I don't think these need to be fixed in the net tree, but it would still
be nice to fix the problem. Please do so, as an initial patch in your
series - so we can then backport if it turns out to eventually be
necessary.
Thanks.
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On Thu, Feb 11, 2021 at 12:48:56PM +0200, [email protected] wrote:
> +static void mvpp2_cm3_write(struct mvpp2 *priv, u32 offset, u32 data)
> +{
> + writel(data, priv->cm3_base + offset);
> +}
> +
> +static u32 mvpp2_cm3_read(struct mvpp2 *priv, u32 offset)
> +{
> + return readl(priv->cm3_base + offset);
> +}
> +
Would it also make sense to have mvpp2_cm3_modify() ? You seem to be
adding several instances of read-modify-write sequences to CM3 RAM in
your series.
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On Thu, Feb 11, 2021 at 12:49:01PM +0200, [email protected] wrote:
> From: Stefan Chulski <[email protected]>
>
> This patch fix GMAC TX flow control autoneg.
> Flow control autoneg wrongly were disabled with enabled TX
> flow control.
>
> Signed-off-by: Stefan Chulski <[email protected]>
> Acked-by: Marcin Wojtas <[email protected]>
Should this patch be placed towards the start of this series (along with
the other fix for the thread number limit I mentioned previously?)
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On Thu, Feb 11, 2021 at 12:49:00PM +0200, [email protected] wrote:
> +/* Configure Rx FIFO Flow control thresholds */
> +void mvpp23_rx_fifo_fc_en(struct mvpp2 *priv, int port, bool en)
> +{
> + int val;
u32 ?
> +
> + val = mvpp2_read(priv, MVPP2_RX_FC_REG(port));
> +
> + if (en)
> + val |= MVPP2_RX_FC_EN;
> + else
> + val &= ~MVPP2_RX_FC_EN;
> +
> + mvpp2_write(priv, MVPP2_RX_FC_REG(port), val);
if (en)
val = MVPP2_RX_FC_EN;
else
val = 0;
mvpp2_modify(priv + MVPP2_RX_FC_REG(port), MVPP2_RX_FC_EN, val);
?
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> -----Original Message-----
> From: Russell King - ARM Linux admin <[email protected]>
> Sent: Thursday, February 11, 2021 2:50 PM
> To: Stefan Chulski <[email protected]>
> Cc: [email protected]; [email protected];
> [email protected]; Nadav Haklai <[email protected]>; Yan
> Markman <[email protected]>; [email protected];
> [email protected]; [email protected]; [email protected];
> [email protected]; [email protected]; [email protected];
> [email protected]; [email protected]; linux-
> [email protected]
> Subject: [EXT] Re: [PATCH v13 net-next 08/15] net: mvpp2: add FCA RXQ non
> occupied descriptor threshold
>
> External Email
>
> ----------------------------------------------------------------------
> On Thu, Feb 11, 2021 at 12:48:55PM +0200, [email protected] wrote:
> > diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> > b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> > index 761f745..8b4073c 100644
> > --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> > +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> > @@ -1133,14 +1133,19 @@ static inline void
> > mvpp2_qvec_interrupt_disable(struct mvpp2_queue_vector *qvec) static
> > void mvpp2_interrupts_mask(void *arg) {
> > struct mvpp2_port *port = arg;
> > + int cpu = smp_processor_id();
> > + u32 thread;
> >
> > /* If the thread isn't used, don't do anything */
> > - if (smp_processor_id() > port->priv->nthreads)
> > + if (cpu > port->priv->nthreads)
> > return;
>
> What happened to a patch fixing this? Did I miss it? Was it submitted
> independently to the net tree?
Some reviewers asked to remove this from the series. I would send it as separate patch to net.
Regards.
> > +/* Configure Rx FIFO Flow control thresholds */ void
> > +mvpp23_rx_fifo_fc_en(struct mvpp2 *priv, int port, bool en) {
> > + int val;
>
> u32 ?
OK.
> > +
> > + val = mvpp2_read(priv, MVPP2_RX_FC_REG(port));
> > +
> > + if (en)
> > + val |= MVPP2_RX_FC_EN;
> > + else
> > + val &= ~MVPP2_RX_FC_EN;
> > +
> > + mvpp2_write(priv, MVPP2_RX_FC_REG(port), val);
>
> if (en)
> val = MVPP2_RX_FC_EN;
> else
> val = 0;
>
> mvpp2_modify(priv + MVPP2_RX_FC_REG(port),
> MVPP2_RX_FC_EN, val);
>
> ?
OK, I would use mvpp2_modify Here.
Thanks,
Stefan.
> Ditto.
>
> I don't think these need to be fixed in the net tree, but it would still be nice
> to fix the problem. Please do so, as an initial patch in your series - so we can
> then backport if it turns out to eventually be necessary.
>
> Thanks.
My series already has 15 patches and patchwork not happy about series with over 15 patches.
Maybe I can send this as separate patch to net-next(or net) first and base this series on this net-next tree with this patch?
Regards,
Stefan.
On Thu, Feb 11, 2021 at 01:02:14PM +0000, Stefan Chulski wrote:
> > On Thu, Feb 11, 2021 at 12:48:55PM +0200, [email protected] wrote:
> > > diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> > > b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> > > index 761f745..8b4073c 100644
> > > --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> > > +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
> > > @@ -1133,14 +1133,19 @@ static inline void
> > > mvpp2_qvec_interrupt_disable(struct mvpp2_queue_vector *qvec) static
> > > void mvpp2_interrupts_mask(void *arg) {
> > > struct mvpp2_port *port = arg;
> > > + int cpu = smp_processor_id();
> > > + u32 thread;
> > >
> > > /* If the thread isn't used, don't do anything */
> > > - if (smp_processor_id() > port->priv->nthreads)
> > > + if (cpu > port->priv->nthreads)
> > > return;
> >
> > What happened to a patch fixing this? Did I miss it? Was it submitted
> > independently to the net tree?
>
> Some reviewers asked to remove this from the series. I would send it as separate patch to net.
It is not a regression, and although it is a fix, as you explained when
I first raised it, it isn't a condition that can be reached due to:
priv->nthreads = min_t(unsigned int, num_present_cpus(),
MVPP2_MAX_THREADS);
and I don't think we support a dynamic present CPU mask on any platform
that is currently supported by this driver.
If we did, then it would be possible for the off-by-one issue to be
triggered.
No matter what, it should happen _before_ this patch set is merged.
Trying to do it afterwards guarantees more pain if stable trees decide
they want to backport the fix.
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On Thu, Feb 11, 2021 at 01:22:35PM +0000, Stefan Chulski wrote:
> > Ditto.
> >
> > I don't think these need to be fixed in the net tree, but it would still be nice
> > to fix the problem. Please do so, as an initial patch in your series - so we can
> > then backport if it turns out to eventually be necessary.
> >
> > Thanks.
>
> My series already has 15 patches and patchwork not happy about series with over 15 patches.
> Maybe I can send this as separate patch to net-next(or net) first and base this series on this net-next tree with this patch?
In that case, send the fixes as a separate series and get that merged
first. It shouldn't take very long to get the fixes merged.
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czw., 11 lut 2021 o 12:49 Stefan Chulski <[email protected]> napisał(a):
>
> > ----------------------------------------------------------------------
> > On Thu, Feb 11, 2021 at 12:48:52PM +0200, [email protected] wrote:
> > > From: Stefan Chulski <[email protected]>
> > >
> > > This patch add PPv23 version definition.
> > > PPv23 is new packet processor in CP115.
> > > Everything that supported by PPv22, also supported by PPv23.
> > > No functional changes in this stage.
> > >
> > > Signed-off-by: Stefan Chulski <[email protected]>
> > > Acked-by: Marcin Wojtas <[email protected]>
> >
> > Reviewed-by: Russell King <[email protected]>
> >
> > > @@ -7049,6 +7049,11 @@ static int mvpp2_probe(struct platform_device
> > *pdev)
> > > priv->port_map |= BIT(i);
> > > }
> > >
> > > + if (priv->hw_version != MVPP21) {
> > > + if (mvpp2_read(priv, MVPP2_VER_ID_REG) ==
> > MVPP2_VER_PP23)
> > > + priv->hw_version = MVPP23;
> > > + }
> > > +
> >
> > The only minor comment I have on this is... the formatting of the above.
> > Wouldn't:
> >
> > if (priv->hw_version >= MVPP22 &&
> > mvpp2_read(priv, MVPP2_VER_ID_REG) == MVPP2_VER_PP23)
> > priv->hw_version = MVPP23;
> >
> > read better?
> >
> > Do we need to even check priv->hw_version here? Isn't this register
> > implemented in PPv2.1 where it contains the value zero?
>
> Yes, we can just:
> if (mvpp2_read(priv, MVPP2_VER_ID_REG) == MVPP2_VER_PP23)
> priv->hw_version = MVPP23;
>
>
I checked the A375 specs and cannot see this particular register. Can
you please double check whether this register is in the old version of
the IP and the Functional Spec is incomplete?
Thanks,
Marcin
Hello:
This series was applied to netdev/net-next.git (refs/heads/master):
On Thu, 11 Feb 2021 12:48:47 +0200 you wrote:
> From: Stefan Chulski <[email protected]>
>
> Armada hardware has a pause generation mechanism in GOP (MAC).
> The GOP generate flow control frames based on an indication programmed in Ports Control 0 Register. There is a bit per port.
> However assertion of the PortX Pause bits in the ports control 0 register only sends a one time pause.
> To complement the function the GOP has a mechanism to periodically send pause control messages based on periodic counters.
> This mechanism ensures that the pause is effective as long as the Appropriate PortX Pause is asserted.
>
> [...]
Here is the summary with links:
- [v13,net-next,01/15] doc: marvell: add CM3 address space and PPv2.3 description
https://git.kernel.org/netdev/net-next/c/1c2b4812b7da
- [v13,net-next,02/15] dts: marvell: add CM3 SRAM memory to cp11x ethernet device tree
https://git.kernel.org/netdev/net-next/c/60523583b07c
- [v13,net-next,03/15] net: mvpp2: add CM3 SRAM memory map
https://git.kernel.org/netdev/net-next/c/e54ad1e01c00
- [v13,net-next,04/15] net: mvpp2: always compare hw-version vs MVPP21
https://git.kernel.org/netdev/net-next/c/60dcd6b7d96e
- [v13,net-next,05/15] net: mvpp2: add PPv23 version definition
https://git.kernel.org/netdev/net-next/c/6af27a1dc422
- [v13,net-next,06/15] net: mvpp2: increase BM pool and RXQ size
https://git.kernel.org/netdev/net-next/c/d07ea73f37f9
- [v13,net-next,07/15] net: mvpp2: add FCA periodic timer configurations
https://git.kernel.org/netdev/net-next/c/2788d8418af5
- [v13,net-next,08/15] net: mvpp2: add FCA RXQ non occupied descriptor threshold
https://git.kernel.org/netdev/net-next/c/bf270fa3c445
- [v13,net-next,09/15] net: mvpp2: enable global flow control
https://git.kernel.org/netdev/net-next/c/a59d354208a7
- [v13,net-next,10/15] net: mvpp2: add RXQ flow control configurations
https://git.kernel.org/netdev/net-next/c/3bd17fdc08e9
- [v13,net-next,11/15] net: mvpp2: add ethtool flow control configuration support
https://git.kernel.org/netdev/net-next/c/76055831cf84
- [v13,net-next,12/15] net: mvpp2: add BM protection underrun feature support
https://git.kernel.org/netdev/net-next/c/eb30b269549a
- [v13,net-next,13/15] net: mvpp2: add PPv23 RX FIFO flow control
https://git.kernel.org/netdev/net-next/c/aca0e23584c9
- [v13,net-next,14/15] net: mvpp2: set 802.3x GoP Flow Control mode
https://git.kernel.org/netdev/net-next/c/262412d55acd
- [v13,net-next,15/15] net: mvpp2: add TX FC firmware check
https://git.kernel.org/netdev/net-next/c/9ca5e767ec34
You are awesome, thank you!
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> ----------------------------------------------------------------------
> Hello:
>
> This series was applied to netdev/net-next.git (refs/heads/master):
>
> On Thu, 11 Feb 2021 12:48:47 +0200 you wrote:
> > From: Stefan Chulski <[email protected]>
> >
> > Armada hardware has a pause generation mechanism in GOP (MAC).
> > The GOP generate flow control frames based on an indication programmed
> in Ports Control 0 Register. There is a bit per port.
> > However assertion of the PortX Pause bits in the ports control 0 register
> only sends a one time pause.
> > To complement the function the GOP has a mechanism to periodically send
> pause control messages based on periodic counters.
> > This mechanism ensures that the pause is effective as long as the
> Appropriate PortX Pause is asserted.
> >
> > [...]
>
> Here is the summary with links:
> - [v13,net-next,01/15] doc: marvell: add CM3 address space and PPv2.3
> description
Next week I would prepare small patch series to address Russell King comments.
Thanks,
Stefan.