[PATCH net-next 2/8] soc: alpine: add udma helpers
Antoine Tenart
antoine.tenart at free-electrons.com
Fri Feb 3 10:12:10 PST 2017
One or more DMA controllers (called Universal DMA) are exposed as PCI
endpoints for some units connected to the I/O fabric. The DMA controller
registers are mapped in BARs.
These helpers help drivers supporting units connected to the Alpine I/O
fabric, to configure and use the exposed UDMA.
The Alpine UDMA is a full-duplex DMA consisting of a Tx (memory to
stream -m2s-) and an Rx (stream to memory -s2m-) DMA engines. Multiple
queues are available per DMA, with each a description and a completion
ring.
Signed-off-by: Antoine Tenart <antoine.tenart at free-electrons.com>
---
drivers/soc/Kconfig | 1 +
drivers/soc/Makefile | 1 +
drivers/soc/alpine/Kconfig | 11 +
drivers/soc/alpine/Makefile | 1 +
drivers/soc/alpine/udma/Makefile | 1 +
drivers/soc/alpine/udma/al_udma_config.c | 140 +++++++
drivers/soc/alpine/udma/al_udma_iofic.c | 110 ++++++
drivers/soc/alpine/udma/al_udma_main.c | 245 ++++++++++++
drivers/soc/alpine/udma/al_udma_queue.c | 232 ++++++++++++
include/linux/soc/alpine/al_hw_udma.h | 499 +++++++++++++++++++++++++
include/linux/soc/alpine/al_hw_udma_config.h | 75 ++++
include/linux/soc/alpine/al_hw_udma_iofic.h | 199 ++++++++++
include/linux/soc/alpine/al_hw_udma_regs.h | 134 +++++++
include/linux/soc/alpine/al_hw_udma_regs_m2s.h | 413 ++++++++++++++++++++
include/linux/soc/alpine/al_hw_udma_regs_s2m.h | 294 +++++++++++++++
15 files changed, 2356 insertions(+)
create mode 100644 drivers/soc/alpine/Kconfig
create mode 100644 drivers/soc/alpine/Makefile
create mode 100644 drivers/soc/alpine/udma/Makefile
create mode 100644 drivers/soc/alpine/udma/al_udma_config.c
create mode 100644 drivers/soc/alpine/udma/al_udma_iofic.c
create mode 100644 drivers/soc/alpine/udma/al_udma_main.c
create mode 100644 drivers/soc/alpine/udma/al_udma_queue.c
create mode 100644 include/linux/soc/alpine/al_hw_udma.h
create mode 100644 include/linux/soc/alpine/al_hw_udma_config.h
create mode 100644 include/linux/soc/alpine/al_hw_udma_iofic.h
create mode 100644 include/linux/soc/alpine/al_hw_udma_regs.h
create mode 100644 include/linux/soc/alpine/al_hw_udma_regs_m2s.h
create mode 100644 include/linux/soc/alpine/al_hw_udma_regs_s2m.h
diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig
index f31bceb69c0d..010b4c60cd1a 100644
--- a/drivers/soc/Kconfig
+++ b/drivers/soc/Kconfig
@@ -1,5 +1,6 @@
menu "SOC (System On Chip) specific Drivers"
+source "drivers/soc/alpine/Kconfig"
source "drivers/soc/bcm/Kconfig"
source "drivers/soc/fsl/Kconfig"
source "drivers/soc/mediatek/Kconfig"
diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile
index 50c23d0bd457..8385e0108630 100644
--- a/drivers/soc/Makefile
+++ b/drivers/soc/Makefile
@@ -2,6 +2,7 @@
# Makefile for the Linux Kernel SOC specific device drivers.
#
+obj-$(CONFIG_ARCH_ALPINE) += alpine/
obj-y += bcm/
obj-$(CONFIG_ARCH_DOVE) += dove/
obj-$(CONFIG_MACH_DOVE) += dove/
diff --git a/drivers/soc/alpine/Kconfig b/drivers/soc/alpine/Kconfig
new file mode 100644
index 000000000000..d09df30ff723
--- /dev/null
+++ b/drivers/soc/alpine/Kconfig
@@ -0,0 +1,11 @@
+if ARCH_ALPINE
+
+config ALPINE_UDMA
+ bool "Alpine UDMA engine"
+ default ARCH_ALPINE
+ help
+ Say y here to enable the Alpine Universal DMA support. This UDMA
+ interfaces with the i/o fabric through a PCI endpoint for each
+ i/o fabric bus.
+
+endif
diff --git a/drivers/soc/alpine/Makefile b/drivers/soc/alpine/Makefile
new file mode 100644
index 000000000000..0d3769b342a8
--- /dev/null
+++ b/drivers/soc/alpine/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_ALPINE_UDMA) += udma/
diff --git a/drivers/soc/alpine/udma/Makefile b/drivers/soc/alpine/udma/Makefile
new file mode 100644
index 000000000000..b5915454a3f3
--- /dev/null
+++ b/drivers/soc/alpine/udma/Makefile
@@ -0,0 +1 @@
+obj-y += al_udma_main.o al_udma_iofic.o al_udma_config.o al_udma_queue.o
diff --git a/drivers/soc/alpine/udma/al_udma_config.c b/drivers/soc/alpine/udma/al_udma_config.c
new file mode 100644
index 000000000000..2471195fd7bd
--- /dev/null
+++ b/drivers/soc/alpine/udma/al_udma_config.c
@@ -0,0 +1,140 @@
+/*
+ * Copyright (C) 2017, Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/device.h>
+#include <linux/soc/alpine/al_hw_udma_config.h>
+#include <linux/soc/alpine/al_hw_udma_regs.h>
+
+/* M2S packet len configuration */
+int al_udma_m2s_packet_size_cfg_set(struct al_udma *udma,
+ struct al_udma_m2s_pkt_len_conf *conf)
+{
+ u32 reg = readl(&udma->udma_regs->m2s.m2s.cfg_len);
+ u32 max_supported_size = UDMA_M2S_CFG_LEN_MAX_PKT_SIZE_MASK;
+
+ WARN_ON(udma->type != UDMA_TX);
+
+ if (conf->encode_64k_as_zero)
+ max_supported_size += 1;
+
+ if (conf->max_pkt_size > max_supported_size) {
+ dev_err(udma->dev,
+ "udma [%s]: requested max_pkt_size (0x%x) exceeds the supported limit (0x%x)\n",
+ udma->name, conf->max_pkt_size, max_supported_size);
+ return -EINVAL;
+ }
+
+ reg &= ~UDMA_M2S_CFG_LEN_ENCODE_64K;
+ if (conf->encode_64k_as_zero)
+ reg |= UDMA_M2S_CFG_LEN_ENCODE_64K;
+ else
+ reg &= ~UDMA_M2S_CFG_LEN_ENCODE_64K;
+
+ reg &= ~UDMA_M2S_CFG_LEN_MAX_PKT_SIZE_MASK;
+ reg |= conf->max_pkt_size;
+
+ writel(reg, &udma->udma_regs->m2s.m2s.cfg_len);
+
+ return 0;
+}
+
+/* set max descriptors */
+void al_udma_m2s_max_descs_set(struct al_udma *udma, u8 max_descs)
+{
+ u32 pref_thr = max_descs, min_burst_above_thr = 4, tmp;
+
+ /*
+ * increase min_burst_above_thr so larger burst can be used to fetch
+ * descriptors
+ */
+ if (pref_thr >= 8)
+ min_burst_above_thr = 8;
+ /*
+ * don't set prefetch threshold too low so we can have the
+ * min_burst_above_thr >= 4
+ */
+ else
+ pref_thr = 4;
+
+ tmp = readl(&udma->udma_regs->m2s.m2s_rd.desc_pref_cfg_2);
+ tmp &= ~UDMA_M2S_RD_DESC_PREF_CFG_2_MAX_DESC_PER_PKT_MASK;
+ tmp |= max_descs << UDMA_M2S_RD_DESC_PREF_CFG_2_MAX_DESC_PER_PKT_SHIFT;
+ writel(tmp, &udma->udma_regs->m2s.m2s_rd.desc_pref_cfg_2);
+
+ tmp = readl(&udma->udma_regs->m2s.m2s_rd.desc_pref_cfg_3);
+ tmp &= ~(UDMA_M2S_RD_DESC_PREF_CFG_3_PREF_THR_MASK |
+ UDMA_M2S_RD_DESC_PREF_CFG_3_MIN_BURST_ABOVE_THR_MASK);
+ tmp |= pref_thr << UDMA_M2S_RD_DESC_PREF_CFG_3_PREF_THR_SHIFT;
+ tmp |= min_burst_above_thr << UDMA_M2S_RD_DESC_PREF_CFG_3_MIN_BURST_ABOVE_THR_SHIFT;
+ writel(tmp, &udma->udma_regs->m2s.m2s_rd.desc_pref_cfg_3);
+}
+
+/* set s2m max descriptors */
+void al_udma_s2m_max_descs_set(struct al_udma *udma, u8 max_descs)
+{
+ u32 pref_thr = max_descs, min_burst_above_thr = 4, tmp;
+
+ /*
+ * increase min_burst_above_thr so larger burst can be used to fetch
+ * descriptors
+ */
+ if (pref_thr >= 8)
+ min_burst_above_thr = 8;
+ /*
+ * don't set prefetch threshold too low so we can have the
+ * min_burst_above_thr >= 4
+ */
+ else
+ pref_thr = 4;
+
+ tmp = readl(&udma->udma_regs->s2m.s2m_rd.desc_pref_cfg_3);
+ tmp &= ~(UDMA_S2M_RD_DESC_PREF_CFG_3_PREF_THR_MASK |
+ UDMA_S2M_RD_DESC_PREF_CFG_3_MIN_BURST_ABOVE_THR_MASK);
+ tmp |= pref_thr << UDMA_S2M_RD_DESC_PREF_CFG_3_PREF_THR_SHIFT;
+ tmp |= min_burst_above_thr << UDMA_S2M_RD_DESC_PREF_CFG_3_MIN_BURST_ABOVE_THR_SHIFT;
+ writel(tmp, &udma->udma_regs->s2m.s2m_rd.desc_pref_cfg_3);
+}
+
+/* S2M UDMA configure a queue's completion descriptors coalescing */
+void al_udma_s2m_q_compl_coal_config(struct al_udma_q *udma_q, bool enable,
+ u32 coal_timeout)
+{
+ u32 reg = readl(&udma_q->q_regs->s2m_q.comp_cfg);
+
+ if (enable)
+ reg &= ~UDMA_S2M_Q_COMP_CFG_DIS_COMP_COAL;
+ else
+ reg |= UDMA_S2M_Q_COMP_CFG_DIS_COMP_COAL;
+
+ writel(reg, &udma_q->q_regs->s2m_q.comp_cfg);
+ writel(coal_timeout, &udma_q->q_regs->s2m_q.comp_cfg_2);
+}
+
+/* S2M UDMA configure completion descriptors write burst parameters */
+int al_udma_s2m_compl_desc_burst_config(struct al_udma *udma, u16 burst_size)
+{
+ u32 tmp;
+
+ if ((burst_size != 64) && (burst_size != 128) && (burst_size != 256)) {
+ dev_err(udma->dev, "invalid burst_size value (%d)\n",
+ burst_size);
+ return -EINVAL;
+ }
+
+ /* convert burst size from bytes to beats (16 byte) */
+ burst_size = burst_size / 16;
+
+ tmp = readl(&udma->udma_regs->s2m.axi_s2m.desc_wr_cfg_1);
+ tmp &= ~(UDMA_AXI_S2M_DESC_WR_CFG_1_MIN_AXI_BEATS_MASK |
+ UDMA_AXI_S2M_DESC_WR_CFG_1_MAX_AXI_BEATS_MASK);
+ tmp |= burst_size << UDMA_AXI_S2M_DESC_WR_CFG_1_MIN_AXI_BEATS_SHIFT;
+ tmp |= burst_size << UDMA_AXI_S2M_DESC_WR_CFG_1_MAX_AXI_BEATS_SHIFT;
+ writel(tmp, &udma->udma_regs->s2m.axi_s2m.desc_wr_cfg_1);
+
+ return 0;
+}
diff --git a/drivers/soc/alpine/udma/al_udma_iofic.c b/drivers/soc/alpine/udma/al_udma_iofic.c
new file mode 100644
index 000000000000..cf4f27d21b61
--- /dev/null
+++ b/drivers/soc/alpine/udma/al_udma_iofic.c
@@ -0,0 +1,110 @@
+/*
+ * Annapurna Labs UDMA-specific IOFIC helpers
+ *
+ * Copyright (C) 2017, Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/soc/alpine/al_hw_udma_iofic.h>
+#include <linux/soc/alpine/al_hw_udma_regs.h>
+
+/* configure the interrupt registers, interrupts will are kept masked */
+static int al_udma_main_iofic_config(void __iomem *iofic,
+ enum al_iofic_mode mode)
+{
+ switch (mode) {
+ case AL_IOFIC_MODE_LEGACY:
+ al_iofic_config(iofic, AL_INT_GROUP_A,
+ INT_CONTROL_GRP_SET_ON_POSEDGE |
+ INT_CONTROL_GRP_MASK_MSI_X |
+ INT_CONTROL_GRP_CLEAR_ON_READ);
+ al_iofic_config(iofic, AL_INT_GROUP_B,
+ INT_CONTROL_GRP_CLEAR_ON_READ |
+ INT_CONTROL_GRP_MASK_MSI_X);
+ al_iofic_config(iofic, AL_INT_GROUP_C,
+ INT_CONTROL_GRP_CLEAR_ON_READ |
+ INT_CONTROL_GRP_MASK_MSI_X);
+ al_iofic_config(iofic, AL_INT_GROUP_D,
+ INT_CONTROL_GRP_SET_ON_POSEDGE |
+ INT_CONTROL_GRP_MASK_MSI_X |
+ INT_CONTROL_GRP_CLEAR_ON_READ);
+ break;
+ case AL_IOFIC_MODE_MSIX_PER_Q:
+ al_iofic_config(iofic, AL_INT_GROUP_A,
+ INT_CONTROL_GRP_SET_ON_POSEDGE |
+ INT_CONTROL_GRP_AUTO_MASK |
+ INT_CONTROL_GRP_AUTO_CLEAR);
+ al_iofic_config(iofic, AL_INT_GROUP_B,
+ INT_CONTROL_GRP_AUTO_CLEAR |
+ INT_CONTROL_GRP_AUTO_MASK |
+ INT_CONTROL_GRP_CLEAR_ON_READ);
+ al_iofic_config(iofic, AL_INT_GROUP_C,
+ INT_CONTROL_GRP_AUTO_CLEAR |
+ INT_CONTROL_GRP_AUTO_MASK |
+ INT_CONTROL_GRP_CLEAR_ON_READ);
+ al_iofic_config(iofic, AL_INT_GROUP_D,
+ INT_CONTROL_GRP_SET_ON_POSEDGE |
+ INT_CONTROL_GRP_CLEAR_ON_READ |
+ INT_CONTROL_GRP_MASK_MSI_X);
+ break;
+ case AL_IOFIC_MODE_MSIX_PER_GROUP:
+ al_iofic_config(iofic, AL_INT_GROUP_A,
+ INT_CONTROL_GRP_SET_ON_POSEDGE |
+ INT_CONTROL_GRP_AUTO_CLEAR |
+ INT_CONTROL_GRP_AUTO_MASK);
+ al_iofic_config(iofic, AL_INT_GROUP_B,
+ INT_CONTROL_GRP_CLEAR_ON_READ |
+ INT_CONTROL_GRP_MASK_MSI_X);
+ al_iofic_config(iofic, AL_INT_GROUP_C,
+ INT_CONTROL_GRP_CLEAR_ON_READ |
+ INT_CONTROL_GRP_MASK_MSI_X);
+ al_iofic_config(iofic, AL_INT_GROUP_D,
+ INT_CONTROL_GRP_SET_ON_POSEDGE |
+ INT_CONTROL_GRP_CLEAR_ON_READ |
+ INT_CONTROL_GRP_MASK_MSI_X);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* configure the UDMA interrupt registers, interrupts are kept masked */
+int al_udma_iofic_config(struct unit_regs __iomem *regs,
+ enum al_iofic_mode mode, u32 m2s_errors_disable,
+ u32 m2s_aborts_disable, u32 s2m_errors_disable,
+ u32 s2m_aborts_disable)
+{
+ int rc;
+
+ rc = al_udma_main_iofic_config(®s->gen.interrupt_regs.main_iofic,
+ mode);
+ if (rc)
+ return rc;
+
+ al_iofic_unmask(®s->gen.interrupt_regs.secondary_iofic_ctrl,
+ AL_INT_GROUP_A, ~m2s_errors_disable);
+ al_iofic_abort_mask(®s->gen.interrupt_regs.secondary_iofic_ctrl,
+ AL_INT_GROUP_A, m2s_aborts_disable);
+
+ al_iofic_unmask(®s->gen.interrupt_regs.secondary_iofic_ctrl,
+ AL_INT_GROUP_B, ~s2m_errors_disable);
+ al_iofic_abort_mask(®s->gen.interrupt_regs.secondary_iofic_ctrl,
+ AL_INT_GROUP_B, s2m_aborts_disable);
+
+ return 0;
+}
+
+/* returns the offset of the unmask register for a given group */
+u32 __iomem *al_udma_iofic_unmask_offset_get(struct unit_regs __iomem *regs,
+ enum al_udma_iofic_level level,
+ int group)
+{
+ WARN_ON(!al_udma_iofic_level_and_group_valid(level, group));
+ return al_iofic_unmask_offset_get(
+ al_udma_iofic_reg_base_get(regs, level), group);
+}
diff --git a/drivers/soc/alpine/udma/al_udma_main.c b/drivers/soc/alpine/udma/al_udma_main.c
new file mode 100644
index 000000000000..86a294d65495
--- /dev/null
+++ b/drivers/soc/alpine/udma/al_udma_main.c
@@ -0,0 +1,245 @@
+/*
+ * Copyright (C) 2017, Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/soc/alpine/al_hw_udma.h>
+#include <linux/soc/alpine/al_hw_udma_config.h>
+
+#define UDMA_STATE_IDLE 0x0
+#define UDMA_STATE_NORMAL 0x1
+#define UDMA_STATE_ABORT 0x2
+#define UDMA_STATE_RESERVED 0x3
+
+const char *const al_udma_states_name[] = {
+ "Idle",
+ "Normal",
+ "Abort",
+ "Reset"
+};
+
+#define AL_ADDR_LOW(x) ((u32)((dma_addr_t)(x)))
+#define AL_ADDR_HIGH(x) ((u32)((((dma_addr_t)(x)) >> 16) >> 16))
+
+static void al_udma_set_defaults(struct al_udma *udma)
+{
+ u8 rev_id = udma->rev_id;
+ u32 tmp;
+
+ if (udma->type == UDMA_TX) {
+ struct unit_regs *tmp_unit_regs =
+ (struct unit_regs *)udma->udma_regs;
+
+ /*
+ * Setting the data fifo depth to 4K (256 strips of 16B)
+ * This allows the UDMA to have 16 outstanding writes
+ */
+ if (rev_id >= AL_UDMA_REV_ID_2) {
+ tmp = readl(&tmp_unit_regs->m2s.m2s_rd.data_cfg);
+ tmp &= ~UDMA_M2S_RD_DATA_CFG_DATA_FIFO_DEPTH_MASK;
+ tmp |= 256 << UDMA_M2S_RD_DATA_CFG_DATA_FIFO_DEPTH_SHIFT;
+ writel(tmp, &tmp_unit_regs->m2s.m2s_rd.data_cfg);
+ }
+
+ /* set AXI timeout to 1M (~2.6 ms) */
+ writel(1000000, &tmp_unit_regs->gen.axi.cfg_1);
+
+ writel(0, &tmp_unit_regs->m2s.m2s_comp.cfg_application_ack);
+ }
+
+ if (udma->type == UDMA_RX)
+ writel(0, &udma->udma_regs->s2m.s2m_comp.cfg_application_ack);
+}
+
+static void al_udma_config_compl(struct al_udma *udma)
+{
+ u32 val;
+
+ if (udma->type != UDMA_RX)
+ return;
+
+ val = readl(&udma->udma_regs->s2m.s2m_comp.cfg_1c);
+ val &= ~UDMA_S2M_COMP_CFG_1C_DESC_SIZE_MASK;
+ val |= (udma->cdesc_size >> 2) & UDMA_S2M_COMP_CFG_1C_DESC_SIZE_MASK;
+ writel(val, &udma->udma_regs->s2m.s2m_comp.cfg_1c);
+}
+
+/* Initialize the udma engine */
+int al_udma_init(struct al_udma *udma, struct al_udma_params *udma_params)
+{
+ int i;
+
+ udma->dev = udma_params->dev;
+
+ if (udma_params->num_of_queues > DMA_MAX_Q) {
+ dev_err(udma->dev, "udma: invalid num_of_queues parameter\n");
+ return -EINVAL;
+ }
+
+ udma->type = udma_params->type;
+ udma->num_of_queues = udma_params->num_of_queues;
+ udma->cdesc_size = udma_params->cdesc_size;
+ udma->gen_regs = &udma_params->udma_regs_base->gen;
+
+ if (udma->type == UDMA_TX)
+ udma->udma_regs = (union udma_regs *)&udma_params->udma_regs_base->m2s;
+ else
+ udma->udma_regs = (union udma_regs *)&udma_params->udma_regs_base->s2m;
+
+ udma->rev_id = al_udma_get_revision(udma_params->udma_regs_base);
+
+ if (udma_params->name == NULL)
+ udma->name = "";
+ else
+ udma->name = udma_params->name;
+
+ udma->state = UDMA_DISABLE;
+ for (i = 0; i < DMA_MAX_Q; i++) {
+ udma->udma_q[i].status = AL_QUEUE_NOT_INITIALIZED;
+ }
+
+ /*
+ * the register expects it to be in words
+ * initialize configuration registers to correct values
+ */
+ al_udma_set_defaults(udma);
+
+ al_udma_config_compl(udma);
+
+ dev_dbg(udma->dev, "udma [%s] initialized. base %p\n", udma->name,
+ udma->udma_regs);
+
+ return 0;
+}
+
+/* Change the UDMA's state */
+void al_udma_state_set(struct al_udma *udma, enum al_udma_state state)
+{
+ u32 reg = 0;
+
+ if (state == udma->state)
+ dev_dbg(udma->dev,
+ "udma [%s]: requested state identical to current state (%d)\n",
+ udma->name, state);
+ else
+ dev_dbg(udma->dev, "udma [%s]: change state from (%s) to (%s)\n",
+ udma->name, al_udma_states_name[udma->state],
+ al_udma_states_name[state]);
+
+ switch (state) {
+ case UDMA_DISABLE:
+ reg |= UDMA_M2S_CHANGE_STATE_DIS;
+ break;
+ case UDMA_NORMAL:
+ reg |= UDMA_M2S_CHANGE_STATE_NORMAL;
+ break;
+ case UDMA_ABORT:
+ reg |= UDMA_M2S_CHANGE_STATE_ABORT;
+ break;
+ default:
+ dev_err(udma->dev, "udma: invalid state (%d)\n", state);
+ return;
+ }
+
+ if (udma->type == UDMA_TX)
+ writel(reg, &udma->udma_regs->m2s.m2s.change_state);
+ else
+ writel(reg, &udma->udma_regs->s2m.s2m.change_state);
+
+ udma->state = state;
+}
+
+/* returns the current UDMA hardware state */
+enum al_udma_state al_udma_state_get(struct al_udma *udma)
+{
+ u32 state_reg;
+ u32 comp_ctrl;
+ u32 stream_if;
+ u32 data_rd;
+ u32 desc_pref;
+
+ if (udma->type == UDMA_TX)
+ state_reg = readl(&udma->udma_regs->m2s.m2s.state);
+ else
+ state_reg = readl(&udma->udma_regs->s2m.s2m.state);
+
+ comp_ctrl = (state_reg & UDMA_M2S_STATE_COMP_CTRL_MASK) >>
+ UDMA_M2S_STATE_COMP_CTRL_SHIFT;
+ stream_if = (state_reg & UDMA_M2S_STATE_STREAM_IF_MASK) >>
+ UDMA_M2S_STATE_STREAM_IF_SHIFT;
+ data_rd = (state_reg & UDMA_M2S_STATE_DATA_RD_CTRL_MASK) >>
+ UDMA_M2S_STATE_DATA_RD_CTRL_SHIFT;
+ desc_pref = (state_reg & UDMA_M2S_STATE_DESC_PREF_MASK) >>
+ UDMA_M2S_STATE_DESC_PREF_SHIFT;
+
+ /* if any of the states is abort then return abort */
+ if ((comp_ctrl == UDMA_STATE_ABORT) || (stream_if == UDMA_STATE_ABORT)
+ || (data_rd == UDMA_STATE_ABORT)
+ || (desc_pref == UDMA_STATE_ABORT))
+ return UDMA_ABORT;
+
+ /* if any of the states is normal then return normal */
+ if ((comp_ctrl == UDMA_STATE_NORMAL)
+ || (stream_if == UDMA_STATE_NORMAL)
+ || (data_rd == UDMA_STATE_NORMAL)
+ || (desc_pref == UDMA_STATE_NORMAL))
+ return UDMA_NORMAL;
+
+ return UDMA_IDLE;
+}
+
+/* get next completed packet from completion ring of the queue */
+u32 al_udma_cdesc_packet_get(struct al_udma_q *udma_q,
+ volatile union al_udma_cdesc **cdesc)
+{
+ u32 count;
+ volatile union al_udma_cdesc *curr;
+ u32 comp_flags;
+
+ /* comp_head points to the last comp desc that was processed */
+ curr = udma_q->comp_head_ptr;
+ comp_flags = le32_to_cpu(curr->al_desc_comp_tx.ctrl_meta);
+
+ /* check if the completion descriptor is new */
+ if (unlikely(!al_udma_new_cdesc(udma_q, comp_flags)))
+ return 0;
+
+ count = udma_q->pkt_crnt_descs + 1;
+
+ /* if new desc found, increment the current packets descriptors */
+ while (!cdesc_is_last(comp_flags)) {
+ curr = al_cdesc_next_update(udma_q, curr);
+ comp_flags = le32_to_cpu(curr->al_desc_comp_tx.ctrl_meta);
+
+ if (unlikely(!al_udma_new_cdesc(udma_q, comp_flags))) {
+ /*
+ * The current packet here doesn't have all
+ * descriptors completed. log the current desc
+ * location and number of completed descriptors so
+ * far. Then return.
+ */
+ udma_q->pkt_crnt_descs = count;
+ udma_q->comp_head_ptr = curr;
+
+ return 0;
+ }
+ count++;
+ }
+
+ /* return back the first descriptor of the packet */
+ *cdesc = al_udma_cdesc_idx_to_ptr(udma_q, udma_q->next_cdesc_idx);
+ udma_q->pkt_crnt_descs = 0;
+ udma_q->comp_head_ptr = al_cdesc_next_update(udma_q, curr);
+
+ dev_dbg(udma_q->udma->dev,
+ "udma [%s %d]: packet completed. first desc %p (ixd 0x%x) descs %d\n",
+ udma_q->udma->name, udma_q->qid, *cdesc, udma_q->next_cdesc_idx,
+ count);
+
+ return count;
+}
diff --git a/drivers/soc/alpine/udma/al_udma_queue.c b/drivers/soc/alpine/udma/al_udma_queue.c
new file mode 100644
index 000000000000..b5ca082faac6
--- /dev/null
+++ b/drivers/soc/alpine/udma/al_udma_queue.c
@@ -0,0 +1,232 @@
+/*
+ * Copyright (C) 2017, Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/soc/alpine/al_hw_udma.h>
+#include <linux/soc/alpine/al_hw_udma_config.h>
+
+/* dma_q flags */
+#define AL_UDMA_Q_FLAGS_IGNORE_RING_ID BIT(0)
+#define AL_UDMA_Q_FLAGS_NO_COMP_UPDATE BIT(1)
+#define AL_UDMA_Q_FLAGS_EN_COMP_COAL BIT(2)
+
+#define AL_UDMA_INITIAL_RING_ID 1
+
+#define AL_ADDR_LOW(x) ((u32)((dma_addr_t)(x)))
+#define AL_ADDR_HIGH(x) ((u32)((((dma_addr_t)(x)) >> 16) >> 16))
+
+/*
+ * misc queue configurations
+ *
+ * @param udma_q udma queue data structure
+ */
+static void al_udma_q_config(struct al_udma_q *udma_q)
+{
+ u32 *reg_addr;
+ u32 val;
+
+ if (udma_q->udma->type == UDMA_TX) {
+ reg_addr = &udma_q->q_regs->m2s_q.rlimit.mask;
+
+ /* enable DMB */
+ val = readl(reg_addr);
+ val &= ~UDMA_M2S_Q_RATE_LIMIT_MASK_INTERNAL_PAUSE_DMB;
+ writel(val, reg_addr);
+ }
+}
+
+/*
+ * set the queue's completion configuration register
+ *
+ * @param udma_q udma queue data structure
+ */
+static void al_udma_q_config_compl(struct al_udma_q *udma_q)
+{
+ u32 *reg_addr;
+ u32 val;
+
+ if (udma_q->udma->type == UDMA_TX)
+ reg_addr = &udma_q->q_regs->m2s_q.comp_cfg;
+ else
+ reg_addr = &udma_q->q_regs->s2m_q.comp_cfg;
+
+ val = readl(reg_addr);
+
+ if (udma_q->flags & AL_UDMA_Q_FLAGS_NO_COMP_UPDATE)
+ val &= ~UDMA_M2S_Q_COMP_CFG_EN_COMP_RING_UPDATE;
+ else
+ val |= UDMA_M2S_Q_COMP_CFG_EN_COMP_RING_UPDATE;
+
+ if (udma_q->flags & AL_UDMA_Q_FLAGS_EN_COMP_COAL)
+ val &= ~UDMA_M2S_Q_COMP_CFG_DIS_COMP_COAL;
+ else
+ val |= UDMA_M2S_Q_COMP_CFG_DIS_COMP_COAL;
+
+ writel(val, reg_addr);
+}
+
+/*
+ * reset the queues pointers (Head, Tail, etc) and set the base addresses
+ *
+ * @param udma_q udma queue data structure
+ */
+static void al_udma_q_set_pointers(struct al_udma_q *udma_q)
+{
+ /*
+ * reset the descriptors ring pointers
+ * assert descriptor base address aligned.
+ */
+ WARN_ON((AL_ADDR_LOW(udma_q->desc_phy_base) &
+ ~UDMA_M2S_Q_TDRBP_LOW_ADDR_MASK) != 0);
+ writel(AL_ADDR_LOW(udma_q->desc_phy_base),
+ &udma_q->q_regs->rings.drbp_low);
+ writel(AL_ADDR_HIGH(udma_q->desc_phy_base),
+ &udma_q->q_regs->rings.drbp_high);
+
+ writel(udma_q->size, &udma_q->q_regs->rings.drl);
+
+ /* if completion ring update disabled */
+ if (udma_q->cdesc_base_ptr == NULL) {
+ udma_q->flags |= AL_UDMA_Q_FLAGS_NO_COMP_UPDATE;
+ } else {
+ /*
+ * reset the completion descriptors ring pointers
+ * assert completion base address aligned.
+ */
+ WARN_ON((AL_ADDR_LOW(udma_q->cdesc_phy_base) & ~UDMA_M2S_Q_TCRBP_LOW_ADDR_MASK) != 0);
+ writel(AL_ADDR_LOW(udma_q->cdesc_phy_base),
+ &udma_q->q_regs->rings.crbp_low);
+ writel(AL_ADDR_HIGH(udma_q->cdesc_phy_base),
+ &udma_q->q_regs->rings.crbp_high);
+ }
+ al_udma_q_config_compl(udma_q);
+}
+
+/*
+ * enable/disable udma queue
+ *
+ * @param udma_q udma queue data structure
+ * @param enable none zero value enables the queue, zero means disable
+ */
+static void al_udma_q_enable(struct al_udma_q *udma_q, int enable)
+{
+ u32 reg = readl(&udma_q->q_regs->rings.cfg);
+
+ if (enable) {
+ reg |= (UDMA_M2S_Q_CFG_EN_PREF | UDMA_M2S_Q_CFG_EN_SCHEDULING);
+ udma_q->status = AL_QUEUE_ENABLED;
+ } else {
+ reg &= ~(UDMA_M2S_Q_CFG_EN_PREF | UDMA_M2S_Q_CFG_EN_SCHEDULING);
+ udma_q->status = AL_QUEUE_DISABLED;
+ }
+
+ writel(reg, &udma_q->q_regs->rings.cfg);
+}
+
+/* Initialize the udma queue data structure */
+int al_udma_q_init(struct al_udma *udma, u32 qid,
+ struct al_udma_q_params *q_params)
+{
+ struct al_udma_q *udma_q;
+
+ if (qid >= udma->num_of_queues) {
+ dev_err(udma->dev, "udma: invalid queue id (%d)\n", qid);
+ return -EINVAL;
+ }
+
+ if (udma->udma_q[qid].status == AL_QUEUE_ENABLED) {
+ dev_err(udma->dev, "udma: queue (%d) already enabled!\n", qid);
+ return -EIO;
+ }
+
+ if (q_params->size < AL_UDMA_MIN_Q_SIZE) {
+ dev_err(udma->dev, "udma: queue (%d) size too small\n", qid);
+ return -EINVAL;
+ }
+
+ if (q_params->size > AL_UDMA_MAX_Q_SIZE) {
+ dev_err(udma->dev, "udma: queue (%d) size too large\n", qid);
+ return -EINVAL;
+ }
+
+ if (q_params->size & (q_params->size - 1)) {
+ dev_err(udma->dev,
+ "udma: queue (%d) size (%d) must be power of 2\n",
+ q_params->size, qid);
+ return -EINVAL;
+ }
+
+ udma_q = &udma->udma_q[qid];
+ /* set the queue's regs base address */
+ if (udma->type == UDMA_TX)
+ udma_q->q_regs =
+ (union udma_q_regs __iomem *)&udma->udma_regs->m2s.m2s_q[qid];
+ else
+ udma_q->q_regs =
+ (union udma_q_regs __iomem *)&udma->udma_regs->s2m.s2m_q[qid];
+
+ udma_q->adapter_rev_id = q_params->adapter_rev_id;
+ udma_q->size = q_params->size;
+ udma_q->size_mask = q_params->size - 1;
+ udma_q->desc_base_ptr = q_params->desc_base;
+ udma_q->desc_phy_base = q_params->desc_phy_base;
+ udma_q->cdesc_base_ptr = q_params->cdesc_base;
+ udma_q->cdesc_phy_base = q_params->cdesc_phy_base;
+
+ udma_q->next_desc_idx = 0;
+ udma_q->next_cdesc_idx = 0;
+ udma_q->end_cdesc_ptr = (u8 *) udma_q->cdesc_base_ptr +
+ (udma_q->size - 1) * udma->cdesc_size;
+ udma_q->comp_head_idx = 0;
+ udma_q->comp_head_ptr = (union al_udma_cdesc *)udma_q->cdesc_base_ptr;
+ udma_q->desc_ring_id = AL_UDMA_INITIAL_RING_ID;
+ udma_q->comp_ring_id = AL_UDMA_INITIAL_RING_ID;
+
+ udma_q->pkt_crnt_descs = 0;
+ udma_q->flags = 0;
+ udma_q->status = AL_QUEUE_DISABLED;
+ udma_q->udma = udma;
+ udma_q->qid = qid;
+
+ /* start hardware configuration: */
+ al_udma_q_config(udma_q);
+ /* reset the queue pointers */
+ al_udma_q_set_pointers(udma_q);
+
+ /* enable the q */
+ al_udma_q_enable(udma_q, 1);
+
+ dev_dbg(udma->dev,
+ "udma [%s %d]: %s q init. size 0x%x\n desc ring info: phys base 0x%llx virt base %p)",
+ udma_q->udma->name, udma_q->qid,
+ udma->type == UDMA_TX ? "Tx" : "Rx", q_params->size,
+ (unsigned long long)q_params->desc_phy_base,
+ q_params->desc_base);
+ dev_dbg(udma->dev,
+ " cdesc ring info: phys base 0x%llx virt base %p",
+ (unsigned long long)q_params->cdesc_phy_base,
+ q_params->cdesc_base);
+
+ return 0;
+}
+
+/* return (by reference) a pointer to a specific queue date structure. */
+int al_udma_q_handle_get(struct al_udma *udma, u32 qid,
+ struct al_udma_q **q_handle)
+{
+
+ if (unlikely(qid >= udma->num_of_queues)) {
+ dev_err(udma->dev, "udma [%s]: invalid queue id (%d)\n",
+ udma->name, qid);
+ return -EINVAL;
+ }
+
+ *q_handle = &udma->udma_q[qid];
+ return 0;
+}
diff --git a/include/linux/soc/alpine/al_hw_udma.h b/include/linux/soc/alpine/al_hw_udma.h
new file mode 100644
index 000000000000..3a428a8daedc
--- /dev/null
+++ b/include/linux/soc/alpine/al_hw_udma.h
@@ -0,0 +1,499 @@
+/*
+ * Copyright (C) 2017, Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef __AL_HW_UDMA_H__
+#define __AL_HW_UDMA_H__
+
+#include <linux/bitops.h>
+#include <linux/io.h>
+#include <linux/types.h>
+
+#include "al_hw_udma_regs.h"
+
+#define DMA_MAX_Q 4
+#define AL_UDMA_MIN_Q_SIZE 4
+#define AL_UDMA_MAX_Q_SIZE BIT(16) /* hw can do more, but we limit it */
+
+#define AL_UDMA_REV_ID_2 2
+
+#define DMA_RING_ID_MASK 0x3
+/* New registers ?? */
+/* Statistics - TBD */
+
+/* UDMA submission descriptor */
+union al_udma_desc {
+ /* TX */
+ struct {
+ u32 len_ctrl;
+ u32 meta_ctrl;
+ u64 buf_ptr;
+ } tx;
+ /* TX Meta, used by upper layer */
+ struct {
+ u32 len_ctrl;
+ u32 meta_ctrl;
+ u32 meta1;
+ u32 meta2;
+ } tx_meta;
+ /* RX */
+ struct {
+ u32 len_ctrl;
+ u32 buf2_ptr_lo;
+ u64 buf1_ptr;
+ } rx;
+} __attribute__((aligned(16)));
+
+/* TX desc length and control fields */
+
+#define AL_M2S_DESC_CONCAT BIT(31)
+#define AL_M2S_DESC_NO_SNOOP_H BIT(29)
+#define AL_M2S_DESC_INT_EN BIT(28)
+#define AL_M2S_DESC_LAST BIT(27)
+#define AL_M2S_DESC_FIRST BIT(26)
+#define AL_M2S_DESC_RING_ID_SHIFT 24
+#define AL_M2S_DESC_RING_ID_MASK (0x3 << AL_M2S_DESC_RING_ID_SHIFT)
+#define AL_M2S_DESC_META_DATA BIT(23)
+#define AL_M2S_DESC_LEN_SHIFT 0
+#define AL_M2S_DESC_LEN_MASK (0xfffff << AL_M2S_DESC_LEN_SHIFT)
+
+#define AL_S2M_DESC_DUAL_BUF BIT(31)
+#define AL_S2M_DESC_RING_ID_SHIFT 24
+#define AL_S2M_DESC_LEN_SHIFT 0
+#define AL_S2M_DESC_LEN_MASK (0xffff << AL_S2M_DESC_LEN_SHIFT)
+#define AL_S2M_DESC_LEN2_SHIFT 16
+#define AL_S2M_DESC_LEN2_MASK (0x3fff << AL_S2M_DESC_LEN2_SHIFT)
+#define AL_S2M_DESC_LEN2_GRANULARITY_SHIFT 6
+
+/* TX/RX descriptor Target-ID field (in the buffer address 64 bit field) */
+#define AL_UDMA_DESC_TGTID_SHIFT 48
+
+/* UDMA completion descriptor */
+union al_udma_cdesc {
+ /* TX completion */
+ struct {
+ u32 ctrl_meta;
+ } al_desc_comp_tx;
+ /* RX completion */
+ struct {
+ u32 ctrl_meta;
+ } al_desc_comp_rx;
+} __attribute__((aligned(4)));
+
+/* TX/RX common completion desc ctrl_meta feilds */
+#define AL_UDMA_CDESC_ERROR BIT(31)
+#define AL_UDMA_CDESC_LAST BIT(27)
+#define AL_UDMA_CDESC_BUF2_USED BIT(31)
+
+/* Basic Buffer structure */
+struct al_buf {
+ /* Buffer physical address */
+ dma_addr_t addr;
+ /* Buffer lenght in bytes */
+ u32 len;
+};
+
+/* UDMA type */
+enum al_udma_type {
+ UDMA_TX,
+ UDMA_RX
+};
+
+/* UDMA state */
+enum al_udma_state {
+ UDMA_DISABLE = 0,
+ UDMA_IDLE,
+ UDMA_NORMAL,
+ UDMA_ABORT,
+ UDMA_RESET
+};
+
+extern const char *const al_udma_states_name[];
+
+/* UDMA Q specific parameters from upper layer */
+struct al_udma_q_params {
+ /*
+ * ring size (in descriptors), submission and completion rings must have
+ * the same size
+ */
+ u32 size;
+ /* cpu address for submission ring descriptors */
+ union al_udma_desc *desc_base;
+ /* submission ring descriptors physical base address */
+ dma_addr_t desc_phy_base;
+ /* completion descriptors pointer, NULL means no completion update */
+ u8 *cdesc_base;
+ /* completion descriptors ring physical base address */
+ dma_addr_t cdesc_phy_base;
+
+ u8 adapter_rev_id;
+};
+
+/* UDMA parameters from upper layer */
+struct al_udma_params {
+ struct device *dev;
+ struct unit_regs __iomem *udma_regs_base;
+ enum al_udma_type type;
+ /* size (in bytes) of the udma completion ring descriptor */
+ u32 cdesc_size;
+ u8 num_of_queues;
+ const char *name;
+};
+
+/* Fordward decleration */
+struct al_udma;
+
+/* SW status of a queue */
+enum al_udma_queue_status {
+ AL_QUEUE_NOT_INITIALIZED = 0,
+ AL_QUEUE_DISABLED,
+ AL_QUEUE_ENABLED,
+ AL_QUEUE_ABORTED
+};
+
+/* UDMA Queue private data structure */
+struct al_udma_q {
+ /* mask used for pointers wrap around equals to size - 1 */
+ u16 size_mask;
+ /* pointer to the per queue UDMA registers */
+ union udma_q_regs __iomem *q_regs;
+ /* base address submission ring descriptors */
+ union al_udma_desc *desc_base_ptr;
+ /* index to the next available submission descriptor */
+ u16 next_desc_idx;
+ /* current submission ring id */
+ u32 desc_ring_id;
+ /* completion descriptors pointer, NULL means no completion */
+ u8 *cdesc_base_ptr;
+ /* index in descriptors for next completing ring descriptor */
+ u16 next_cdesc_idx;
+ /* used for wrap around detection */
+ u8 *end_cdesc_ptr;
+ /* completion ring head pointer register shadow */
+ u16 comp_head_idx;
+ /*
+ * when working in get_packet mode we maintain pointer instead of the
+ * above id
+ */
+ volatile union al_udma_cdesc *comp_head_ptr;
+
+ /* holds the number of processed descriptors of the current packet */
+ u32 pkt_crnt_descs;
+ /* current completion Ring Id */
+ u32 comp_ring_id;
+
+ dma_addr_t desc_phy_base; /* submission desc. physical base */
+ dma_addr_t cdesc_phy_base; /* completion desc. physical base */
+
+ u32 flags; /* flags used for completion modes */
+ u32 size; /* ring size in descriptors */
+ enum al_udma_queue_status status;
+ struct al_udma *udma; /* pointer to parent UDMA */
+ u32 qid; /* the index number of the queue */
+
+ /*
+ * The following fields are duplicated from the UDMA parent adapter
+ * due to performance considerations.
+ */
+ u8 adapter_rev_id;
+} ____cacheline_aligned;
+
+/* UDMA */
+struct al_udma {
+ const char *name;
+ struct device *dev;
+ enum al_udma_type type; /* Tx or Rx */
+ enum al_udma_state state;
+ /* size (in bytes) of the udma completion ring descriptor */
+ u32 cdesc_size;
+ u8 num_of_queues;
+ union udma_regs __iomem *udma_regs;
+ struct udma_gen_regs *gen_regs;
+ struct al_udma_q udma_q[DMA_MAX_Q];
+ unsigned int rev_id;
+};
+
+/*
+ * Initialize the udma engine
+ *
+ * @param udma udma data structure
+ * @param udma_params udma parameters from upper layer
+ *
+ * @return 0 on success. -EINVAL otherwise.
+ */
+int al_udma_init(struct al_udma *udma, struct al_udma_params *udma_params);
+
+/*
+ * Initialize the udma queue data structure
+ *
+ * @param udma
+ * @param qid
+ * @param q_params
+ *
+ * @return 0 if no error found.
+ * -EINVAL if the qid is out of range
+ * -EIO if queue was already initialized
+ */
+
+int al_udma_q_init(struct al_udma *udma, u32 qid,
+ struct al_udma_q_params *q_params);
+
+/*
+ * return (by reference) a pointer to a specific queue date structure.
+ * this pointer needed for calling functions (i.e. al_udma_desc_action_add) that
+ * require this pointer as input argument.
+ *
+ * @param udma udma data structure
+ * @param qid queue index
+ * @param q_handle pointer to the location where the queue structure pointer
+ * written to.
+ *
+ * @return 0 on success. -EINVAL otherwise.
+ */
+int al_udma_q_handle_get(struct al_udma *udma, u32 qid,
+ struct al_udma_q **q_handle);
+
+/*
+ * Change the UDMA's state
+ *
+ * @param udma udma data structure
+ * @param state the target state
+ */
+void al_udma_state_set(struct al_udma *udma, enum al_udma_state state);
+
+/*
+ * return the current UDMA hardware state
+ *
+ * @param udma udma handle
+ *
+ * @return the UDMA state as reported by the hardware.
+ */
+enum al_udma_state al_udma_state_get(struct al_udma *udma);
+
+/*
+ * Action handling
+ */
+
+/*
+ * get number of descriptors that can be submitted to the udma.
+ * keep one free descriptor to simplify full/empty management
+ * @param udma_q queue handle
+ *
+ * @return num of free descriptors.
+ */
+static inline u32 al_udma_available_get(struct al_udma_q *udma_q)
+{
+ u16 tmp = udma_q->next_cdesc_idx - (udma_q->next_desc_idx + 1);
+ tmp &= udma_q->size_mask;
+
+ return (u32) tmp;
+}
+
+/*
+ * get next available descriptor
+ * @param udma_q queue handle
+ *
+ * @return pointer to the next available descriptor
+ */
+static inline union al_udma_desc *al_udma_desc_get(struct al_udma_q *udma_q)
+{
+ union al_udma_desc *desc;
+ u16 next_desc_idx;
+
+ next_desc_idx = udma_q->next_desc_idx;
+ desc = udma_q->desc_base_ptr + next_desc_idx;
+
+ next_desc_idx++;
+
+ /* if reached end of queue, wrap around */
+ udma_q->next_desc_idx = next_desc_idx & udma_q->size_mask;
+
+ return desc;
+}
+
+/*
+ * get ring id for the last allocated descriptor
+ * @param udma_q
+ *
+ * @return ring id for the last allocated descriptor
+ * this function must be called each time a new descriptor is allocated
+ * by the al_udma_desc_get(), unless ring id is ignored.
+ */
+static inline u32 al_udma_ring_id_get(struct al_udma_q *udma_q)
+{
+ u32 ring_id;
+
+ ring_id = udma_q->desc_ring_id;
+
+ /* calculate the ring id of the next desc */
+ /* if next_desc points to first desc, then queue wrapped around */
+ if (unlikely(udma_q->next_desc_idx) == 0)
+ udma_q->desc_ring_id = (udma_q->desc_ring_id + 1) &
+ DMA_RING_ID_MASK;
+ return ring_id;
+}
+
+/* add DMA action - trigger the engine */
+/*
+ * add num descriptors to the submission queue.
+ *
+ * @param udma_q queue handle
+ * @param num number of descriptors to add to the queues ring.
+ */
+static inline void al_udma_desc_action_add(struct al_udma_q *udma_q, u32 num)
+{
+ u32 *addr;
+
+ addr = &udma_q->q_regs->rings.drtp_inc;
+ /*
+ * make sure data written to the descriptors will be visible by the
+ * DMA
+ */
+ wmb();
+
+ writel_relaxed(num, addr);
+}
+
+#define cdesc_is_last(flags) ((flags) & AL_UDMA_CDESC_LAST)
+
+/*
+ * return pointer to the cdesc + offset desciptors. wrap around when needed.
+ *
+ * @param udma_q queue handle
+ * @param cdesc pointer that set by this function
+ * @param offset offset desciptors
+ *
+ */
+static inline volatile union al_udma_cdesc *al_cdesc_next(
+ struct al_udma_q *udma_q,
+ volatile union al_udma_cdesc *cdesc,
+ u32 offset)
+{
+ volatile u8 *tmp = (volatile u8 *) cdesc + offset * udma_q->udma->cdesc_size;
+
+ /* if wrap around */
+ if (unlikely((tmp > udma_q->end_cdesc_ptr)))
+ return (union al_udma_cdesc *)
+ (udma_q->cdesc_base_ptr +
+ (tmp - udma_q->end_cdesc_ptr - udma_q->udma->cdesc_size));
+
+ return (volatile union al_udma_cdesc *) tmp;
+}
+
+/*
+ * check if the flags of the descriptor indicates that is new one
+ * the function uses the ring id from the descriptor flags to know whether it
+ * new one by comparing it with the curring ring id of the queue
+ *
+ * @param udma_q queue handle
+ * @param flags the flags of the completion descriptor
+ *
+ * @return true if the completion descriptor is new one.
+ * false if it old one.
+ */
+static inline bool al_udma_new_cdesc(struct al_udma_q *udma_q, u32 flags)
+{
+ if (((flags & AL_M2S_DESC_RING_ID_MASK) >> AL_M2S_DESC_RING_ID_SHIFT)
+ == udma_q->comp_ring_id)
+ return true;
+ return false;
+}
+
+/*
+ * get next completion descriptor
+ * this function will also increment the completion ring id when the ring wraps
+ * around
+ *
+ * @param udma_q queue handle
+ * @param cdesc current completion descriptor
+ *
+ * @return pointer to the completion descriptor that follows the one pointed by
+ * cdesc
+ */
+static inline volatile union al_udma_cdesc *al_cdesc_next_update(
+ struct al_udma_q *udma_q,
+ volatile union al_udma_cdesc *cdesc)
+{
+ /* if last desc, wrap around */
+ if (unlikely(((volatile u8 *) cdesc == udma_q->end_cdesc_ptr))) {
+ udma_q->comp_ring_id =
+ (udma_q->comp_ring_id + 1) & DMA_RING_ID_MASK;
+ return (union al_udma_cdesc *) udma_q->cdesc_base_ptr;
+ }
+ return (volatile union al_udma_cdesc *) ((volatile u8 *) cdesc + udma_q->udma->cdesc_size);
+}
+
+/*
+ * get next completed packet from completion ring of the queue
+ *
+ * @param udma_q udma queue handle
+ * @param desc pointer that set by this function to the first descriptor
+ * note: desc is valid only when return value is not zero
+ * @return number of descriptors that belong to the packet. 0 means no completed
+ * full packet was found.
+ * If the descriptors found in the completion queue don't form full packet (no
+ * desc with LAST flag), then this function will do the following:
+ * (1) save the number of processed descriptors.
+ * (2) save last processed descriptor, so next time it called, it will resume
+ * from there.
+ * (3) return 0.
+ * note: the descriptors that belong to the completed packet will still be
+ * considered as used, that means the upper layer is safe to access those
+ * descriptors when this function returns. the al_udma_cdesc_ack() should be
+ * called to inform the udma driver that those descriptors are freed.
+ */
+u32 al_udma_cdesc_packet_get(struct al_udma_q *udma_q,
+ volatile union al_udma_cdesc **desc);
+
+/* get completion descriptor pointer from its index */
+#define al_udma_cdesc_idx_to_ptr(udma_q, idx) \
+ ((volatile union al_udma_cdesc *) ((udma_q)->cdesc_base_ptr + \
+ (idx) * (udma_q)->udma->cdesc_size))
+
+
+/*
+ * return number of all completed descriptors in the completion ring
+ *
+ * @param udma_q udma queue handle
+ * @param cdesc pointer that set by this function to the first descriptor
+ * note: desc is valid only when return value is not zero
+ * note: pass NULL if not interested
+ * @return number of descriptors. 0 means no completed descriptors were found.
+ * note: the descriptors that belong to the completed packet will still be
+ * considered as used, that means the upper layer is safe to access those
+ * descriptors when this function returns. the al_udma_cdesc_ack() should be
+ * called to inform the udma driver that those descriptors are freed.
+ */
+static inline u32 al_udma_cdesc_get_all(struct al_udma_q *udma_q,
+ volatile union al_udma_cdesc **cdesc)
+{
+ u16 count = 0;
+
+ udma_q->comp_head_idx = readl(&udma_q->q_regs->rings.crhp) & 0xffff;
+ count = (udma_q->comp_head_idx - udma_q->next_cdesc_idx) &
+ udma_q->size_mask;
+
+ if (cdesc)
+ *cdesc = al_udma_cdesc_idx_to_ptr(udma_q, udma_q->next_cdesc_idx);
+
+ return count;
+}
+
+/*
+ * acknowledge the driver that the upper layer completed processing completion
+ * descriptors
+ *
+ * @param udma_q udma queue handle
+ * @param num number of descriptors to acknowledge
+ */
+static inline void al_udma_cdesc_ack(struct al_udma_q *udma_q, u32 num)
+{
+ udma_q->next_cdesc_idx += num;
+ udma_q->next_cdesc_idx &= udma_q->size_mask;
+}
+
+#endif /* __AL_HW_UDMA_H__ */
diff --git a/include/linux/soc/alpine/al_hw_udma_config.h b/include/linux/soc/alpine/al_hw_udma_config.h
new file mode 100644
index 000000000000..0245d2a51459
--- /dev/null
+++ b/include/linux/soc/alpine/al_hw_udma_config.h
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2017, Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef __AL_HW_UDMA_CONFIG_H__
+#define __AL_HW_UDMA_CONFIG_H__
+
+#include "al_hw_udma_regs.h"
+#include "al_hw_udma.h"
+
+/* M2S max packet size configuration */
+struct al_udma_m2s_pkt_len_conf {
+ u32 max_pkt_size;
+ bool encode_64k_as_zero;
+};
+
+/* M2S DMA Rate Limitation mode */
+struct al_udma_m2s_rlimit_mode {
+ bool pkt_mode_en;
+ u16 short_cycle_sz;
+ u32 token_init_val;
+};
+
+enum al_udma_m2s_rlimit_action {
+ AL_UDMA_STRM_RLIMIT_ENABLE,
+ AL_UDMA_STRM_RLIMIT_PAUSE,
+ AL_UDMA_STRM_RLIMIT_RESET
+};
+
+/* UDMA / UDMA Q rate limitation configuration */
+struct al_udma_m2s_rlimit {
+ struct al_udma_m2s_rlimit_mode rlimit_mode; /* rate limitation enablers */
+};
+
+/* Configure M2S packet len */
+int al_udma_m2s_packet_size_cfg_set(struct al_udma *udma,
+ struct al_udma_m2s_pkt_len_conf *conf);
+
+void al_udma_s2m_max_descs_set(struct al_udma *udma, u8 max_descs);
+void al_udma_m2s_max_descs_set(struct al_udma *udma, u8 max_descs);
+
+/* UDMA get revision */
+static inline unsigned int al_udma_get_revision(
+ struct unit_regs __iomem *unit_regs)
+{
+ return (readl(&unit_regs->gen.dma_misc.revision)
+ & UDMA_GEN_DMA_MISC_REVISION_PROGRAMMING_ID_MASK) >>
+ UDMA_GEN_DMA_MISC_REVISION_PROGRAMMING_ID_SHIFT;
+}
+
+/*
+ * S2M UDMA configure a queue's completion descriptors coalescing
+ *
+ * @param q_udma
+ * @param enable set to true to enable completion coalescing
+ * @param coal_timeout in South Bridge cycles.
+ */
+void al_udma_s2m_q_compl_coal_config(struct al_udma_q *udma_q, bool enable,
+ u32 coal_timeout);
+
+/*
+ * S2M UDMA configure completion descriptors write burst parameters
+ *
+ * @param udma
+ * @param burst_size completion descriptors write burst size in bytes.
+ *
+ * @return 0 if no error found.
+ */
+int al_udma_s2m_compl_desc_burst_config(struct al_udma *udma, u16 burst_size);
+
+#endif /* __AL_HW_UDMA_CONFIG_H__ */
diff --git a/include/linux/soc/alpine/al_hw_udma_iofic.h b/include/linux/soc/alpine/al_hw_udma_iofic.h
new file mode 100644
index 000000000000..f55c4b608857
--- /dev/null
+++ b/include/linux/soc/alpine/al_hw_udma_iofic.h
@@ -0,0 +1,199 @@
+/*
+ * Copyright (C) 2017, Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef __AL_HW_UDMA_IOFIC_H__
+#define __AL_HW_UDMA_IOFIC_H__
+
+#include <linux/soc/alpine/iofic.h>
+
+#include "al_hw_udma_regs.h"
+
+/*
+ * Interrupt Mode
+ * This is the interrupt mode for the primary interrupt level The secondary
+ * interrupt level does not have mode and it is always a level sensitive
+ * interrupt that is reflected in group D of the primary.
+ */
+enum al_iofic_mode {
+ AL_IOFIC_MODE_LEGACY, /*< level-sensitive interrupt wire */
+ AL_IOFIC_MODE_MSIX_PER_Q, /*< per UDMA queue MSI-X interrupt */
+ AL_IOFIC_MODE_MSIX_PER_GROUP
+};
+
+/* interrupt controller level (primary/secondary) */
+enum al_udma_iofic_level {
+ AL_UDMA_IOFIC_LEVEL_PRIMARY,
+ AL_UDMA_IOFIC_LEVEL_SECONDARY
+};
+
+/*
+ * The next four groups represents the standard 4 groups in the primary
+ * interrupt controller of each bus-master unit in the I/O Fabric.
+ * The first two groups can be used when accessing the secondary interrupt
+ * controller as well.
+ */
+#define AL_INT_GROUP_A 0 /* summary of the below events */
+#define AL_INT_GROUP_B 1 /* RX completion queues */
+#define AL_INT_GROUP_C 2 /* TX completion queues */
+#define AL_INT_GROUP_D 3 /* Misc */
+
+/*
+ * Primary interrupt controller, group A bits
+ * Group A bits which are just summary bits of GROUP B, C and D
+ */
+#define AL_INT_GROUP_A_GROUP_B_SUM BIT(0)
+#define AL_INT_GROUP_A_GROUP_C_SUM BIT(1)
+#define AL_INT_GROUP_A_GROUP_D_SUM BIT(2)
+
+/*
+ * Configure the UDMA interrupt controller registers, interrupts will are kept
+ * masked.
+ *
+ * This is a static setting that should be called while initialized the
+ * interrupt controller within a given UDMA, and should not be modified during
+ * runtime unless the UDMA is completely disabled. The first argument sets the
+ * interrupt and MSIX modes. The m2s/s2m errors/abort are a set of bit-wise
+ * masks to define the behaviour of the UDMA once an error happens: The _abort
+ * will put the UDMA in abort state once an error happens The _error bitmask
+ * will indicate and error in the secondary cause register but will not abort.
+ * The bit-mask that the _errors_disable and _aborts_disable are described in
+ * 'AL_INT_2ND_GROUP_A_*' and 'AL_INT_2ND_GROUP_B_*'
+ *
+ * @param regs pointer to unit registers
+ * @param mode interrupt scheme mode (legacy, MSI-X..)
+ * @param m2s_errors_disable
+ * This is a bit-wise mask, to indicate which one of the error causes in
+ * secondary interrupt group_A should generate an interrupt. When a bit is
+ * set, the error cause is ignored.
+ * Recommended value: 0 (enable all errors).
+ * @param m2s_aborts_disable
+ * This is a bit-wise mask, to indicate which one of the error causes in
+ * secondary interrupt group_A should automatically put the UDMA in
+ * abort state. When a bit is set, the error cause does cause an abort.
+ * Recommended value: 0 (enable all aborts).
+ * @param s2m_errors_disable
+ * This is a bit-wise mask, to indicate which one of the error causes in
+ * secondary interrupt group_A should generate an interrupt. When a bit is
+ * set, the error cause is ignored.
+ * Recommended value: 0xE0 (disable hint errors).
+ * @param s2m_aborts_disable
+ * This is a bit-wise mask, to indicate which one of the error causes in
+ * secondary interrupt group_A should automatically put the UDMA in
+ * abort state. When a bit is set, the error cause does cause an abort.
+ * Recommended value: 0xE0 (disable hint aborts).
+ *
+ * @return 0 on success. -EINVAL otherwise.
+ */
+int al_udma_iofic_config(struct unit_regs __iomem *regs,
+ enum al_iofic_mode mode, u32 m2s_errors_disable,
+ u32 m2s_aborts_disable, u32 s2m_errors_disable,
+ u32 s2m_aborts_disable);
+/*
+ * return the offset of the unmask register for a given group.
+ * this function can be used when the upper layer wants to directly
+ * access the unmask regiter and bypass the al_udma_iofic_unmask() API.
+ *
+ * @param regs pointer to udma registers
+ * @param level the interrupt controller level (primary / secondary)
+ * @param group the interrupt group ('AL_INT_GROUP_*')
+ * @return the offset of the unmask register.
+ */
+u32 __iomem *al_udma_iofic_unmask_offset_get(struct unit_regs __iomem *regs,
+ enum al_udma_iofic_level level,
+ int group);
+
+/*
+ * Get the interrupt controller base address for either the primary or secondary
+ * interrupt controller
+ *
+ * @param regs pointer to udma unit registers
+ * @param level the interrupt controller level (primary / secondary)
+ *
+ * @returns The interrupt controller base address
+ */
+static inline void __iomem *al_udma_iofic_reg_base_get(
+ struct unit_regs __iomem *regs, enum al_udma_iofic_level level)
+{
+ void __iomem *iofic_regs = (level == AL_UDMA_IOFIC_LEVEL_PRIMARY) ?
+ (void __iomem *)®s->gen.interrupt_regs.main_iofic :
+ (void __iomem *)®s->gen.interrupt_regs.secondary_iofic_ctrl;
+
+ return iofic_regs;
+}
+
+/*
+ * Check the interrupt controller level/group validity
+ *
+ * @param level the interrupt controller level (primary / secondary)
+ * @param group the interrupt group ('AL_INT_GROUP_*')
+ *
+ * @returns 0 - invalid, 1 - valid
+ */
+static inline int al_udma_iofic_level_and_group_valid(
+ enum al_udma_iofic_level level, int group)
+{
+ if (((level == AL_UDMA_IOFIC_LEVEL_PRIMARY) && (group >= 0) && (group < 4)) ||
+ ((level == AL_UDMA_IOFIC_LEVEL_SECONDARY) && (group >= 0) && (group < 2)))
+ return 1;
+
+ return 0;
+}
+/*
+ * unmask specific interrupts for a given group
+ * this functions uses the interrupt mask clear register to guarantee atomicity
+ * it's safe to call it while the mask is changed by the HW (auto mask) or
+ * another cpu.
+ *
+ * @param regs pointer to udma unit registers
+ * @param level the interrupt controller level (primary / secondary)
+ * @param group the interrupt group ('AL_INT_GROUP_*')
+ * @param mask bitwise of interrupts to unmask, set bits will be unmasked.
+ */
+static inline void al_udma_iofic_unmask(struct unit_regs __iomem *regs,
+ enum al_udma_iofic_level level,
+ int group, u32 mask)
+{
+ BUG_ON(!al_udma_iofic_level_and_group_valid(level, group));
+ al_iofic_unmask(al_udma_iofic_reg_base_get(regs, level), group, mask);
+}
+
+/*
+ * mask specific interrupts for a given group
+ * this functions modifies interrupt mask register, the callee must make sure
+ * the mask is not changed by another cpu.
+ *
+ * @param regs pointer to udma unit registers
+ * @param level the interrupt controller level (primary / secondary)
+ * @param group the interrupt group ('AL_INT_GROUP_*')
+ * @param mask bitwise of interrupts to mask, set bits will be masked.
+ */
+static inline void al_udma_iofic_mask(struct unit_regs __iomem *regs,
+ enum al_udma_iofic_level level, int group,
+ u32 mask)
+{
+ BUG_ON(!al_udma_iofic_level_and_group_valid(level, group));
+ al_iofic_mask(al_udma_iofic_reg_base_get(regs, level), group, mask);
+}
+
+/*
+ * read interrupt cause register for a given group
+ * this will clear the set bits if the Clear on Read mode enabled.
+ * @param regs pointer to udma unit registers
+ * @param level the interrupt controller level (primary / secondary)
+ * @param group the interrupt group ('AL_INT_GROUP_*')
+ */
+static inline u32 al_udma_iofic_read_cause(struct unit_regs __iomem *regs,
+ enum al_udma_iofic_level level,
+ int group)
+{
+ BUG_ON(!al_udma_iofic_level_and_group_valid(level, group));
+ return al_iofic_read_cause(al_udma_iofic_reg_base_get(regs, level),
+ group);
+}
+
+#endif
diff --git a/include/linux/soc/alpine/al_hw_udma_regs.h b/include/linux/soc/alpine/al_hw_udma_regs.h
new file mode 100644
index 000000000000..8ae3ceaa3753
--- /dev/null
+++ b/include/linux/soc/alpine/al_hw_udma_regs.h
@@ -0,0 +1,134 @@
+/*
+ * Copyright (C) 2017, Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef __AL_HW_UDMA_REG_H
+#define __AL_HW_UDMA_REG_H
+
+#include "al_hw_udma_regs_m2s.h"
+#include "al_hw_udma_regs_s2m.h"
+
+
+/* Design programming interface revision ID */
+#define UDMA_GEN_DMA_MISC_REVISION_PROGRAMMING_ID_MASK 0xfff
+#define UDMA_GEN_DMA_MISC_REVISION_PROGRAMMING_ID_SHIFT 0x0
+
+struct al_iofic_grp_mod {
+ u32 grp_int_mod_reg;
+ u32 grp_int_tgtid_reg;
+};
+
+struct al_iofic_grp_ctrl {
+ u32 int_cause_grp;
+ u32 rsrvd1;
+ u32 int_cause_set_grp;
+ u32 rsrvd2;
+ u32 int_mask_grp;
+ u32 rsrvd3;
+ u32 int_mask_clear_grp;
+ u32 rsrvd4;
+ u32 int_status_grp;
+ u32 rsrvd5;
+ u32 int_control_grp;
+ u32 rsrvd6;
+ u32 int_abort_msk_grp;
+ u32 rsrvd7;
+ u32 int_log_msk_grp;
+ u32 rsrvd8;
+};
+
+struct al_iofic_regs {
+ struct al_iofic_grp_ctrl ctrl[0];
+ u32 rsrvd1[0x100];
+ struct al_iofic_grp_mod grp_int_mod[0][32];
+};
+
+struct udma_iofic_regs {
+ struct al_iofic_regs main_iofic;
+ u32 rsrvd1[0x700];
+ struct al_iofic_grp_ctrl secondary_iofic_ctrl[2];
+};
+
+struct udma_gen_dma_misc {
+ u32 int_cfg;
+ u32 revision;
+ u32 general_cfg_1;
+ u32 general_cfg_2;
+ u32 general_cfg_3;
+ u32 general_cfg_4;
+ u32 general_cfg_5;
+ u32 rsrvd[57];
+};
+
+/*
+ * Mailbox interrupt generator.
+ * Generates interrupt to neighbor DMA
+ */
+struct udma_gen_mailbox {
+ u32 interrupt;
+ u32 msg_out;
+ u32 msg_in;
+ u32 rsrvd[0xd];
+};
+
+struct udma_gen_axi {
+ u32 cfg_1;
+ u32 cfg_2;
+ u32 endian_cfg;
+ u32 rsrvd[0x3d];
+};
+
+struct udma_gen_regs {
+ struct udma_iofic_regs interrupt_regs;
+ struct udma_gen_dma_misc dma_misc;
+ struct udma_gen_mailbox mailbox[4];
+ struct udma_gen_axi axi;
+};
+
+/* UDMA registers, either m2s or s2m */
+union udma_regs {
+ struct udma_m2s_regs m2s;
+ struct udma_s2m_regs s2m;
+};
+
+struct unit_regs {
+ struct udma_m2s_regs m2s;
+ u32 rsrvd0[0x2c00];
+ struct udma_s2m_regs s2m;
+ u32 rsrvd1[0x1c00];
+ struct udma_gen_regs gen;
+};
+
+/*
+ * UDMA submission and completion registers, M2S and S2M UDMAs have same
+ * stucture
+ */
+struct udma_rings_regs {
+ u32 rsrvd0[8];
+ u32 cfg; /* Descriptor ring configuration */
+ u32 status; /* Descriptor ring status and information */
+ u32 drbp_low; /* Descriptor Ring Base Pointer [31:4] */
+ u32 drbp_high; /* Descriptor Ring Base Pointer [63:32] */
+ u32 drl; /* Descriptor Ring Length[23:2] */
+ u32 drhp; /* Descriptor Ring Head Pointer */
+ u32 drtp_inc; /* Descriptor Tail Pointer increment */
+ u32 drtp; /* Descriptor Tail Pointer */
+ u32 dcp; /* Descriptor Current Pointer */
+ u32 crbp_low; /* Completion Ring Base Pointer [31:4] */
+ u32 crbp_high; /* Completion Ring Base Pointer [63:32] */
+ u32 crhp; /* Completion Ring Head Pointer */
+ u32 crhp_internal; /* Completion Ring Head Pointer internal */
+};
+
+/* M2S and S2M generic structure of Q registers */
+union udma_q_regs {
+ struct udma_rings_regs rings;
+ struct udma_m2s_q m2s_q;
+ struct udma_s2m_q s2m_q;
+};
+
+#endif /* __AL_HW_UDMA_REG_H */
diff --git a/include/linux/soc/alpine/al_hw_udma_regs_m2s.h b/include/linux/soc/alpine/al_hw_udma_regs_m2s.h
new file mode 100644
index 000000000000..78a04de9df27
--- /dev/null
+++ b/include/linux/soc/alpine/al_hw_udma_regs_m2s.h
@@ -0,0 +1,413 @@
+/*
+ * Copyright (C) 2015, Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef __AL_HW_UDMA_M2S_REG_H
+#define __AL_HW_UDMA_M2S_REG_H
+
+#include <linux/types.h>
+
+struct udma_axi_m2s {
+ /* Completion write master configuration */
+ u32 comp_wr_cfg_1;
+ /* Completion write master configuration */
+ u32 comp_wr_cfg_2;
+ /* Data read master configuration */
+ u32 data_rd_cfg_1;
+ /* Data read master configuration */
+ u32 data_rd_cfg_2;
+ /* Descriptor read master configuration */
+ u32 desc_rd_cfg_1;
+ /* Descriptor read master configuration */
+ u32 desc_rd_cfg_2;
+ /* Data read master configuration */
+ u32 data_rd_cfg;
+ /* Descriptors read master configuration */
+ u32 desc_rd_cfg_3;
+ /* Descriptors write master configuration (completion) */
+ u32 desc_wr_cfg_1;
+ /* AXI outstanding configuration */
+ u32 ostand_cfg;
+ u32 rsrvd[54];
+};
+struct udma_m2s {
+ /*
+ * DMA state.
+ * 00 - No pending tasks
+ * 01 – Normal (active)
+ * 10 – Abort (error condition)
+ * 11 – Reserved
+ */
+ u32 state;
+ /* CPU request to change DMA state */
+ u32 change_state;
+ u32 rsrvd_0;
+ /*
+ * M2S DMA error log mask.
+ * Each error has an interrupt controller cause bit.
+ * This register determines if these errors cause the M2S DMA to log the
+ * error condition.
+ * 0 - Log is enabled.
+ * 1 - Log is masked.
+ */
+ u32 err_log_mask;
+ u32 rsrvd_1;
+ /*
+ * DMA header log.
+ * Sample the packet header that caused the error.
+ */
+ u32 log_0;
+ /*
+ * DMA header log.
+ * Sample the packet header that caused the error.
+ */
+ u32 log_1;
+ /*
+ * DMA header log.
+ * Sample the packet header that caused the error.
+ */
+ u32 log_2;
+ /*
+ * DMA header log.
+ * Sample the packet header that caused the error.
+ */
+ u32 log_3;
+ /* DMA clear error log */
+ u32 clear_err_log;
+ /* M2S data FIFO status */
+ u32 data_fifo_status;
+ /* M2S header FIFO status */
+ u32 header_fifo_status;
+ /* M2S unack FIFO status */
+ u32 unack_fifo_status;
+ /* Select queue for debug */
+ u32 indirect_ctrl;
+ /*
+ * M2S prefetch FIFO status.
+ * Status of the selected queue in M2S_indirect_ctrl
+ */
+ u32 sel_pref_fifo_status;
+ /*
+ * M2S completion FIFO status.
+ * Status of the selected queue in M2S_indirect_ctrl
+ */
+ u32 sel_comp_fifo_status;
+ /*
+ * M2S rate limit status.
+ * Status of the selected queue in M2S_indirect_ctrl
+ */
+ u32 sel_rate_limit_status;
+ /*
+ * M2S DWRR scheduler status.
+ * Status of the selected queue in M2S_indirect_ctrl
+ */
+ u32 sel_dwrr_status;
+ /* M2S state machine and FIFO clear control */
+ u32 clear_ctrl;
+ /* Misc Check enable */
+ u32 check_en;
+ /* M2S FIFO enable control, internal */
+ u32 fifo_en;
+ /* M2S packet length configuration */
+ u32 cfg_len;
+ /* Stream interface configuration */
+ u32 stream_cfg;
+ u32 rsrvd[41];
+};
+struct udma_m2s_rd {
+ /* M2S descriptor prefetch configuration */
+ u32 desc_pref_cfg_1;
+ /* M2S descriptor prefetch configuration */
+ u32 desc_pref_cfg_2;
+ /* M2S descriptor prefetch configuration */
+ u32 desc_pref_cfg_3;
+ u32 rsrvd_0;
+ /* Data burst read configuration */
+ u32 data_cfg;
+ u32 rsrvd[11];
+};
+struct udma_m2s_dwrr {
+ /* Tx DMA DWRR scheduler configuration */
+ u32 cfg_sched;
+ /* Token bucket rate limit control */
+ u32 ctrl_deficit_cnt;
+ u32 rsrvd[14];
+};
+struct udma_m2s_rate_limiter {
+ /* Token bucket rate limit configuration */
+ u32 gen_cfg;
+ /*
+ * Token bucket rate limit control.
+ * Controls the cycle counters.
+ */
+ u32 ctrl_cycle_cnt;
+ /*
+ * Token bucket rate limit control.
+ * Controls the token bucket counter.
+ */
+ u32 ctrl_token;
+ u32 rsrvd[13];
+};
+
+struct udma_rlimit_common {
+ /* Token bucket configuration */
+ u32 cfg_1s;
+ /* Token bucket rate limit configuration */
+ u32 cfg_cycle;
+ /* Token bucket rate limit configuration */
+ u32 cfg_token_size_1;
+ /* Token bucket rate limit configuration */
+ u32 cfg_token_size_2;
+ /* Token bucket rate limit configuration */
+ u32 sw_ctrl;
+ /*
+ * Mask the different types of rate limiter.
+ * 0 - Rate limit is active.
+ * 1 - Rate limit is masked.
+ */
+ u32 mask;
+};
+
+struct udma_m2s_stream_rate_limiter {
+ struct udma_rlimit_common rlimit;
+ u32 rsrvd[10];
+};
+struct udma_m2s_comp {
+ /* Completion controller configuration */
+ u32 cfg_1c;
+ /* Completion controller coalescing configuration */
+ u32 cfg_coal;
+ /* Completion controller application acknowledge configuration */
+ u32 cfg_application_ack;
+ u32 rsrvd[61];
+};
+struct udma_m2s_stat {
+ /* Statistics counters configuration */
+ u32 cfg_st;
+ /* Counting number of descriptors with First-bit set. */
+ u32 tx_pkt;
+ /*
+ * Counting the net length of the data buffers [64-bit]
+ * Should be read before tx_bytes_high
+ */
+ u32 tx_bytes_low;
+ /*
+ * Counting the net length of the data buffers [64-bit],
+ * Should be read after tx_bytes_low (value is sampled when reading
+ * Should be read before tx_bytes_low
+ */
+ u32 tx_bytes_high;
+ /* Total number of descriptors read from the host memory */
+ u32 prefed_desc;
+ /* Number of packets read from the unack FIFO */
+ u32 comp_pkt;
+ /* Number of descriptors written into the completion ring */
+ u32 comp_desc;
+ /*
+ * Number of acknowledged packets.
+ * (acknowledge received from the stream interface)
+ */
+ u32 ack_pkts;
+ u32 rsrvd[56];
+};
+struct udma_m2s_feature {
+ /*
+ * M2S Feature register.
+ * M2S instantiation parameters
+ */
+ u32 reg_1;
+ /* Reserved M2S feature register */
+ u32 reg_2;
+ /*
+ * M2S Feature register.
+ * M2S instantiation parameters
+ */
+ u32 reg_3;
+ /*
+ * M2S Feature register.
+ * M2S instantiation parameters
+ */
+ u32 reg_4;
+ /*
+ * M2S Feature register.
+ * M2S instantiation parameters
+ */
+ u32 reg_5;
+ u32 rsrvd[59];
+};
+struct udma_m2s_q {
+ u32 rsrvd_0[8];
+ /* M2S descriptor ring configuration */
+ u32 cfg;
+ /* M2S descriptor ring status and information */
+ u32 status;
+ /* TX Descriptor Ring Base Pointer [31:4] */
+ u32 tdrbp_low;
+ /* TX Descriptor Ring Base Pointer [63:32] */
+ u32 tdrbp_high;
+ /*
+ * TX Descriptor Ring Length[23:2]
+ */
+ u32 tdrl;
+ /* TX Descriptor Ring Head Pointer */
+ u32 tdrhp;
+ /* Tx Descriptor Tail Pointer increment */
+ u32 tdrtp_inc;
+ /* Tx Descriptor Tail Pointer */
+ u32 tdrtp;
+ /* TX Descriptor Current Pointer */
+ u32 tdcp;
+ /* Tx Completion Ring Base Pointer [31:4] */
+ u32 tcrbp_low;
+ /* TX Completion Ring Base Pointer [63:32] */
+ u32 tcrbp_high;
+ /* TX Completion Ring Head Pointer */
+ u32 tcrhp;
+ /*
+ * Tx Completion Ring Head Pointer internal (Before the
+ * coalescing FIFO)
+ */
+ u32 tcrhp_internal;
+ u32 rsrvd_1[3];
+ /* Rate limit configuration */
+ struct udma_rlimit_common rlimit;
+ u32 rsrvd_2[2];
+ /* DWRR scheduler configuration */
+ u32 dwrr_cfg_1;
+ /* DWRR scheduler configuration */
+ u32 dwrr_cfg_2;
+ /* DWRR scheduler configuration */
+ u32 dwrr_cfg_3;
+ /* DWRR scheduler software control */
+ u32 dwrr_sw_ctrl;
+ u32 rsrvd_3[4];
+ /* Completion controller configuration */
+ u32 comp_cfg;
+ u32 rsrvd_4[3];
+ /* SW control */
+ u32 q_sw_ctrl;
+ u32 rsrvd_5[3];
+ /* Number of M2S Tx packets after the scheduler */
+ u32 q_tx_pkt;
+ u32 rsrvd[975];
+};
+
+struct udma_m2s_regs {
+ u32 rsrvd_0[64];
+ struct udma_axi_m2s axi_m2s;
+ struct udma_m2s m2s;
+ struct udma_m2s_rd m2s_rd;
+ struct udma_m2s_dwrr m2s_dwrr;
+ struct udma_m2s_rate_limiter m2s_rate_limiter;
+ struct udma_m2s_stream_rate_limiter m2s_stream_rate_limiter;
+ struct udma_m2s_comp m2s_comp;
+ struct udma_m2s_stat m2s_stat;
+ struct udma_m2s_feature m2s_feature;
+ u32 rsrvd_1[576];
+ struct udma_m2s_q m2s_q[4];
+};
+
+
+/* Completion control */
+#define UDMA_M2S_STATE_COMP_CTRL_MASK 0x00000003
+#define UDMA_M2S_STATE_COMP_CTRL_SHIFT 0
+/* Stream interface */
+#define UDMA_M2S_STATE_STREAM_IF_MASK 0x00000030
+#define UDMA_M2S_STATE_STREAM_IF_SHIFT 4
+/* Data read control */
+#define UDMA_M2S_STATE_DATA_RD_CTRL_MASK 0x00000300
+#define UDMA_M2S_STATE_DATA_RD_CTRL_SHIFT 8
+/* Descriptor prefetch */
+#define UDMA_M2S_STATE_DESC_PREF_MASK 0x00003000
+#define UDMA_M2S_STATE_DESC_PREF_SHIFT 12
+
+/* Start normal operation */
+#define UDMA_M2S_CHANGE_STATE_NORMAL BIT(0)
+/* Stop normal operation */
+#define UDMA_M2S_CHANGE_STATE_DIS BIT(1)
+/*
+ * Stop all machines.
+ * (Prefetch, scheduling, completion and stream interface)
+ */
+#define UDMA_M2S_CHANGE_STATE_ABORT BIT(2)
+
+/* Maximum packet size for the M2S */
+#define UDMA_M2S_CFG_LEN_MAX_PKT_SIZE_MASK 0x000FFFFF
+/*
+ * Length encoding for 64K.
+ * 0 - length 0x0000 = 0
+ * 1 - length 0x0000 = 64k
+ */
+#define UDMA_M2S_CFG_LEN_ENCODE_64K BIT(24)
+
+/* Maximum number of descriptors per packet */
+#define UDMA_M2S_RD_DESC_PREF_CFG_2_MAX_DESC_PER_PKT_MASK 0x0000001F
+#define UDMA_M2S_RD_DESC_PREF_CFG_2_MAX_DESC_PER_PKT_SHIFT 0
+/*
+ * Minimum descriptor burst size when prefetch FIFO level is above the
+ * descriptor prefetch threshold
+ */
+#define UDMA_M2S_RD_DESC_PREF_CFG_3_MIN_BURST_ABOVE_THR_MASK 0x000000F0
+#define UDMA_M2S_RD_DESC_PREF_CFG_3_MIN_BURST_ABOVE_THR_SHIFT 4
+/*
+ * Descriptor fetch threshold.
+ * Used as a threshold to determine the allowed minimum descriptor burst size.
+ * (Must be at least max_desc_per_pkt)
+ */
+#define UDMA_M2S_RD_DESC_PREF_CFG_3_PREF_THR_MASK 0x0000FF00
+#define UDMA_M2S_RD_DESC_PREF_CFG_3_PREF_THR_SHIFT 8
+
+/*
+ * Maximum number of data beats in the data read FIFO.
+ * Defined based on data FIFO size
+ * (default FIFO size 2KB → 128 beats)
+ */
+#define UDMA_M2S_RD_DATA_CFG_DATA_FIFO_DEPTH_MASK 0x000003FF
+#define UDMA_M2S_RD_DATA_CFG_DATA_FIFO_DEPTH_SHIFT 0
+
+/*
+ * Enable operation of this queue.
+ * Start prefetch.
+ */
+#define UDMA_M2S_Q_CFG_EN_PREF BIT(16)
+/*
+ * Enable operation of this queue.
+ * Start scheduling.
+ */
+#define UDMA_M2S_Q_CFG_EN_SCHEDULING BIT(17)
+
+/*
+ * M2S Descriptor Ring Base address [31:4].
+ * Value of the base address of the M2S descriptor ring
+ * [3:0] - 0 - 16B alignment is enforced
+ * ([11:4] should be 0 for 4KB alignment)
+ */
+#define UDMA_M2S_Q_TDRBP_LOW_ADDR_MASK 0xFFFFFFF0
+
+/*
+ * M2S Descriptor Ring Base address [31:4].
+ * Value of the base address of the M2S descriptor ring
+ * [3:0] - 0 - 16B alignment is enforced
+ * ([11:4] should be 0 for 4KB alignment)
+ * NOTE:
+ * Length of the descriptor ring (in descriptors) associated with the ring base
+ * address. Ends at maximum burst size alignment.
+ */
+#define UDMA_M2S_Q_TCRBP_LOW_ADDR_MASK 0xFFFFFFF0
+
+/*
+ * Mask the internal pause mechanism for DMB.
+ * (Data Memory Barrier).
+ */
+#define UDMA_M2S_Q_RATE_LIMIT_MASK_INTERNAL_PAUSE_DMB BIT(2)
+
+/* Enable writing to the completion ring */
+#define UDMA_M2S_Q_COMP_CFG_EN_COMP_RING_UPDATE BIT(0)
+/* Disable the completion coalescing function. */
+#define UDMA_M2S_Q_COMP_CFG_DIS_COMP_COAL BIT(1)
+
+#endif /* __AL_HW_UDMA_M2S_REG_H */
diff --git a/include/linux/soc/alpine/al_hw_udma_regs_s2m.h b/include/linux/soc/alpine/al_hw_udma_regs_s2m.h
new file mode 100644
index 000000000000..e23480718844
--- /dev/null
+++ b/include/linux/soc/alpine/al_hw_udma_regs_s2m.h
@@ -0,0 +1,294 @@
+/*
+ * Copyright (C) 2017, Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef __AL_HW_UDMA_S2M_REG_H
+#define __AL_HW_UDMA_S2M_REG_H
+
+struct udma_axi_s2m {
+ /* Data write master configuration */
+ u32 data_wr_cfg_1;
+ /* Data write master configuration */
+ u32 data_wr_cfg_2;
+ /* Descriptor read master configuration */
+ u32 desc_rd_cfg_4;
+ /* Descriptor read master configuration */
+ u32 desc_rd_cfg_5;
+ /* Completion write master configuration */
+ u32 comp_wr_cfg_1;
+ /* Completion write master configuration */
+ u32 comp_wr_cfg_2;
+ /* Data write master configuration */
+ u32 data_wr_cfg;
+ /* Descriptors read master configuration */
+ u32 desc_rd_cfg_3;
+ /* Completion descriptors write master configuration */
+ u32 desc_wr_cfg_1;
+ /* AXI outstanding read configuration */
+ u32 ostand_cfg_rd;
+ /* AXI outstanding write configuration */
+ u32 ostand_cfg_wr;
+ u32 rsrvd[53];
+};
+struct udma_s2m {
+ /*
+ * DMA state
+ * 00 - No pending tasks
+ * 01 – Normal (active)
+ * 10 – Abort (error condition)
+ * 11 – Reserved
+ */
+ u32 state;
+ /* CPU request to change DMA state */
+ u32 change_state;
+ u32 rsrvd_0;
+ /*
+ * S2M DMA error log mask.
+ * Each error has an interrupt controller cause bit.
+ * This register determines if these errors cause the S2M DMA to log the
+ * error condition.
+ * 0 - Log is enable
+ * 1 - Log is masked.
+ */
+ u32 err_log_mask;
+ u32 rsrvd_1;
+ /*
+ * DMA header log
+ * Sample the packet header that caused the error
+ */
+ u32 log_0;
+ /*
+ * DMA header log
+ * Sample the packet header that caused the error.
+ */
+ u32 log_1;
+ /*
+ * DMA header log
+ * Sample the packet header that caused the error.
+ */
+ u32 log_2;
+ /*
+ * DMA header log
+ * Sample the packet header that caused the error
+ */
+ u32 log_3;
+ /* DMA clear error log */
+ u32 clear_err_log;
+ /* S2M stream data FIFO status */
+ u32 s_data_fifo_status;
+ /* S2M stream header FIFO status */
+ u32 s_header_fifo_status;
+ /* S2M AXI data FIFO status */
+ u32 axi_data_fifo_status;
+ /* S2M unack FIFO status */
+ u32 unack_fifo_status;
+ /* Select queue for debug */
+ u32 indirect_ctrl;
+ /*
+ * S2M prefetch FIFO status.
+ * Status of the selected queue in S2M_indirect_ctrl
+ */
+ u32 sel_pref_fifo_status;
+ /*
+ * S2M completion FIFO status.
+ * Status of the selected queue in S2M_indirect_ctrl
+ */
+ u32 sel_comp_fifo_status;
+ /* S2M state machine and FIFO clear control */
+ u32 clear_ctrl;
+ /* S2M Misc Check enable */
+ u32 check_en;
+ /* S2M FIFO enable control, internal */
+ u32 fifo_en;
+ /* Stream interface configuration */
+ u32 stream_cfg;
+ u32 rsrvd[43];
+};
+struct udma_s2m_rd {
+ /* S2M descriptor prefetch configuration */
+ u32 desc_pref_cfg_1;
+ /* S2M descriptor prefetch configuration */
+ u32 desc_pref_cfg_2;
+ /* S2M descriptor prefetch configuration */
+ u32 desc_pref_cfg_3;
+ /* S2M descriptor prefetch configuration */
+ u32 desc_pref_cfg_4;
+ u32 rsrvd[12];
+};
+struct udma_s2m_wr {
+ /* Stream data FIFO configuration */
+ u32 data_cfg_1;
+ /* Data write configuration */
+ u32 data_cfg_2;
+ u32 rsrvd[14];
+};
+struct udma_s2m_comp {
+ /* Completion controller configuration */
+ u32 cfg_1c;
+ /* Completion controller configuration */
+ u32 cfg_2c;
+ u32 rsrvd_0;
+ /* Completion controller application acknowledge configuration */
+ u32 cfg_application_ack;
+ u32 rsrvd[12];
+};
+struct udma_s2m_stat {
+ u32 rsrvd_0;
+ /* Number of dropped packets */
+ u32 drop_pkt;
+ /*
+ * Counting the net length of the data buffers [64-bit]
+ * Should be read before rx_bytes_high
+ */
+ u32 rx_bytes_low;
+ /*
+ * Counting the net length of the data buffers [64-bit]
+ * Should be read after tx_bytes_low (value is sampled when reading
+ * Should be read before rx_bytes_low
+ */
+ u32 rx_bytes_high;
+ /* Total number of descriptors read from the host memory */
+ u32 prefed_desc;
+ /* Number of packets written into the completion ring */
+ u32 comp_pkt;
+ /* Number of descriptors written into the completion ring */
+ u32 comp_desc;
+ /*
+ * Number of acknowledged packets.
+ * (acknowledge sent to the stream interface)
+ */
+ u32 ack_pkts;
+ u32 rsrvd[56];
+};
+struct udma_s2m_feature {
+ /*
+ * S2M Feature register
+ * S2M instantiation parameters
+ */
+ u32 reg_1;
+ /* Reserved S2M feature register */
+ u32 reg_2;
+ /*
+ * S2M Feature register
+ * S2M instantiation parameters
+ */
+ u32 reg_3;
+ /*
+ * S2M Feature register.
+ * S2M instantiation parameters.
+ */
+ u32 reg_4;
+ /*
+ * S2M Feature register.
+ * S2M instantiation parameters.
+ */
+ u32 reg_5;
+ /* S2M Feature register. S2M instantiation parameters. */
+ u32 reg_6;
+ u32 rsrvd[58];
+};
+struct udma_s2m_q {
+ u32 rsrvd_0[8];
+ /* S2M Descriptor ring configuration */
+ u32 cfg;
+ /* S2M Descriptor ring status and information */
+ u32 status;
+ /* Rx Descriptor Ring Base Pointer [31:4] */
+ u32 rdrbp_low;
+ /* Rx Descriptor Ring Base Pointer [63:32] */
+ u32 rdrbp_high;
+ /*
+ * Rx Descriptor Ring Length[23:2]
+ */
+ u32 rdrl;
+ /* RX Descriptor Ring Head Pointer */
+ u32 rdrhp;
+ /* Rx Descriptor Tail Pointer increment */
+ u32 rdrtp_inc;
+ /* Rx Descriptor Tail Pointer */
+ u32 rdrtp;
+ /* RX Descriptor Current Pointer */
+ u32 rdcp;
+ /* Rx Completion Ring Base Pointer [31:4] */
+ u32 rcrbp_low;
+ /* Rx Completion Ring Base Pointer [63:32] */
+ u32 rcrbp_high;
+ /* Rx Completion Ring Head Pointer */
+ u32 rcrhp;
+ /*
+ * RX Completion Ring Head Pointer internal.
+ * (Before the coalescing FIFO)
+ */
+ u32 rcrhp_internal;
+ /* Completion controller configuration for the queue */
+ u32 comp_cfg;
+ /* Completion controller configuration for the queue */
+ u32 comp_cfg_2;
+ /* Packet handler configuration */
+ u32 pkt_cfg;
+ /* Queue QoS configuration */
+ u32 qos_cfg;
+ /* DMB software control */
+ u32 q_sw_ctrl;
+ /* Number of S2M Rx packets after completion */
+ u32 q_rx_pkt;
+ u32 rsrvd[997];
+};
+
+struct udma_s2m_regs {
+ u32 rsrvd_0[64];
+ struct udma_axi_s2m axi_s2m;
+ struct udma_s2m s2m;
+ struct udma_s2m_rd s2m_rd;
+ struct udma_s2m_wr s2m_wr;
+ struct udma_s2m_comp s2m_comp;
+ u32 rsrvd_1[80];
+ struct udma_s2m_stat s2m_stat;
+ struct udma_s2m_feature s2m_feature;
+ u32 rsrvd_2[576];
+ struct udma_s2m_q s2m_q[4];
+};
+
+/*
+ * Defines the maximum number of AXI beats for a single AXI burst. This value is
+ * used for the burst split decision.
+ */
+#define UDMA_AXI_S2M_DESC_WR_CFG_1_MAX_AXI_BEATS_MASK 0x000000FF
+#define UDMA_AXI_S2M_DESC_WR_CFG_1_MAX_AXI_BEATS_SHIFT 0
+/*
+ * Minimum burst for writing completion descriptors.
+ * (AXI beats).
+ * Value must be aligned to cache lines (64 bytes).
+ * Default value is 2 cache lines, 8 beats.
+ */
+#define UDMA_AXI_S2M_DESC_WR_CFG_1_MIN_AXI_BEATS_MASK 0x00FF0000
+#define UDMA_AXI_S2M_DESC_WR_CFG_1_MIN_AXI_BEATS_SHIFT 16
+
+/*
+ * Minimum descriptor burst size when prefetch FIFO level is above the
+ * descriptor prefetch threshold
+ */
+#define UDMA_S2M_RD_DESC_PREF_CFG_3_MIN_BURST_ABOVE_THR_MASK 0x000000F0
+#define UDMA_S2M_RD_DESC_PREF_CFG_3_MIN_BURST_ABOVE_THR_SHIFT 4
+/*
+ * Descriptor fetch threshold.
+ * Used as a threshold to determine the allowed minimum descriptor burst size.
+ * (Must be at least "max_desc_per_pkt")
+ */
+#define UDMA_S2M_RD_DESC_PREF_CFG_3_PREF_THR_MASK 0x0000FF00
+#define UDMA_S2M_RD_DESC_PREF_CFG_3_PREF_THR_SHIFT 8
+
+/*
+ * Completion descriptor size.
+ * (words)
+ */
+#define UDMA_S2M_COMP_CFG_1C_DESC_SIZE_MASK 0x0000000F
+
+/* Disables the completion coalescing function. */
+#define UDMA_S2M_Q_COMP_CFG_DIS_COMP_COAL BIT(1)
+
+#endif /* __AL_HW_UDMA_S2M_REG_H */
--
2.11.0
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