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Subject[PATCH net-next v2 4/8] net: stmmac: gmac4+: Add TBS support
Date
Adds all the necessary HW hooks to support TBS feature in QoS cores.

Changes from v1:
- Remove uneeded LT shift as the IP already does this.

Signed-off-by: Jose Abreu <Jose.Abreu@synopsys.com>

---
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: Jose Abreu <joabreu@synopsys.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: netdev@vger.kernel.org
Cc: linux-stm32@st-md-mailman.stormreply.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
---
drivers/net/ethernet/stmicro/stmmac/dwmac4.h | 1 +
drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c | 10 ++++++++++
drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.h | 7 +++++++
drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c | 21 +++++++++++++++++++++
drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.h | 7 +++++++
5 files changed, 46 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4.h b/drivers/net/ethernet/stmicro/stmmac/dwmac4.h
index 2e6b60a476c6..af50af27550b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4.h
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4.h
@@ -239,6 +239,7 @@ enum power_event {

/* MAC HW features3 bitmap */
#define GMAC_HW_FEAT_ASP GENMASK(29, 28)
+#define GMAC_HW_FEAT_TBSSEL BIT(27)
#define GMAC_HW_FEAT_FPESEL BIT(26)
#define GMAC_HW_FEAT_ESTWID GENMASK(21, 20)
#define GMAC_HW_FEAT_ESTDEP GENMASK(19, 17)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c
index 3e14da69f378..eff82065a501 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c
@@ -10,6 +10,7 @@

#include <linux/stmmac.h>
#include "common.h"
+#include "dwmac4.h"
#include "dwmac4_descs.h"

static int dwmac4_wrback_get_tx_status(void *data, struct stmmac_extra_stats *x,
@@ -505,6 +506,14 @@ static void dwmac4_set_sec_addr(struct dma_desc *p, dma_addr_t addr)
p->des3 = cpu_to_le32(upper_32_bits(addr) | RDES3_BUFFER2_VALID_ADDR);
}

+static void dwmac4_set_tbs(struct dma_edesc *p, u32 sec, u32 nsec)
+{
+ p->des4 = cpu_to_le32((sec & TDES4_LT) | TDES4_LTV);
+ p->des5 = cpu_to_le32(nsec & TDES5_LT);
+ p->des6 = 0;
+ p->des7 = 0;
+}
+
const struct stmmac_desc_ops dwmac4_desc_ops = {
.tx_status = dwmac4_wrback_get_tx_status,
.rx_status = dwmac4_wrback_get_rx_status,
@@ -534,6 +543,7 @@ const struct stmmac_desc_ops dwmac4_desc_ops = {
.set_vlan = dwmac4_set_vlan,
.get_rx_header_len = dwmac4_get_rx_header_len,
.set_sec_addr = dwmac4_set_sec_addr,
+ .set_tbs = dwmac4_set_tbs,
};

const struct stmmac_mode_ops dwmac4_ring_mode_ops = {
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.h b/drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.h
index 6d92109dc9aa..6da070ccd737 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.h
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.h
@@ -73,6 +73,13 @@
#define TDES3_CONTEXT_TYPE BIT(30)
#define TDES3_CONTEXT_TYPE_SHIFT 30

+/* TDES4 */
+#define TDES4_LTV BIT(31)
+#define TDES4_LT GENMASK(7, 0)
+
+/* TDES5 */
+#define TDES5_LT GENMASK(31, 8)
+
/* TDS3 use for both format (read and write back) */
#define TDES3_OWN BIT(31)
#define TDES3_OWN_SHIFT 31
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
index 213d44482ffa..bb29bfcd62c3 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
@@ -404,6 +404,7 @@ static void dwmac4_get_hw_feature(void __iomem *ioaddr,

/* 5.10 Features */
dma_cap->asp = (hw_cap & GMAC_HW_FEAT_ASP) >> 28;
+ dma_cap->tbssel = (hw_cap & GMAC_HW_FEAT_TBSSEL) >> 27;
dma_cap->fpesel = (hw_cap & GMAC_HW_FEAT_FPESEL) >> 26;
dma_cap->estwid = (hw_cap & GMAC_HW_FEAT_ESTWID) >> 20;
dma_cap->estdep = (hw_cap & GMAC_HW_FEAT_ESTDEP) >> 17;
@@ -471,6 +472,25 @@ static void dwmac4_enable_sph(void __iomem *ioaddr, bool en, u32 chan)
writel(value, ioaddr + DMA_CHAN_CONTROL(chan));
}

+static int dwmac4_enable_tbs(void __iomem *ioaddr, bool en, u32 chan)
+{
+ u32 value = readl(ioaddr + DMA_CHAN_TX_CONTROL(chan));
+
+ if (en)
+ value |= DMA_CONTROL_EDSE;
+ else
+ value &= ~DMA_CONTROL_EDSE;
+
+ writel(value, ioaddr + DMA_CHAN_TX_CONTROL(chan));
+
+ value = readl(ioaddr + DMA_CHAN_TX_CONTROL(chan)) & DMA_CONTROL_EDSE;
+ if (en && !value)
+ return -EIO;
+
+ writel(DMA_TBS_DEF_FTOS, ioaddr + DMA_TBS_CTRL);
+ return 0;
+}
+
const struct stmmac_dma_ops dwmac4_dma_ops = {
.reset = dwmac4_dma_reset,
.init = dwmac4_dma_init,
@@ -527,4 +547,5 @@ const struct stmmac_dma_ops dwmac410_dma_ops = {
.qmode = dwmac4_qmode,
.set_bfsize = dwmac4_set_bfsize,
.enable_sph = dwmac4_enable_sph,
+ .enable_tbs = dwmac4_enable_tbs,
};
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.h b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.h
index bcb6d5190f3d..8391ca63d943 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.h
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.h
@@ -22,6 +22,7 @@
#define DMA_DEBUG_STATUS_1 0x00001010
#define DMA_DEBUG_STATUS_2 0x00001014
#define DMA_AXI_BUS_MODE 0x00001028
+#define DMA_TBS_CTRL 0x00001050

/* DMA Bus Mode bitmap */
#define DMA_BUS_MODE_SFT_RESET BIT(0)
@@ -82,6 +83,11 @@

#define DMA_AXI_BURST_LEN_MASK 0x000000FE

+/* DMA TBS Control */
+#define DMA_TBS_FTOS GENMASK(31, 8)
+#define DMA_TBS_FTOV BIT(0)
+#define DMA_TBS_DEF_FTOS (DMA_TBS_FTOS | DMA_TBS_FTOV)
+
/* Following DMA defines are chanels oriented */
#define DMA_CHAN_BASE_ADDR 0x00001100
#define DMA_CHAN_BASE_OFFSET 0x80
@@ -114,6 +120,7 @@
#define DMA_CONTROL_MSS_MASK GENMASK(13, 0)

/* DMA Tx Channel X Control register defines */
+#define DMA_CONTROL_EDSE BIT(28)
#define DMA_CONTROL_TSE BIT(12)
#define DMA_CONTROL_OSP BIT(4)
#define DMA_CONTROL_ST BIT(0)
--
2.7.4
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