[PATCH v1 1/5] dma: Add QorIQ qDMA engine driver support
Yuan Yao
yao.yuan at freescale.com
Wed Aug 17 23:38:44 PDT 2016
From: Yuan Yao <yao.yuan at nxp.com>
Add QorIQ queue direct memory access(QDMA) controller support.
This module can be found on QorIQ LS1021A and LS1043A SoCs.
Signed-off-by: Yuan Yao <yao.yuan at nxp.com>
---
drivers/dma/Kconfig | 12 +
drivers/dma/Makefile | 1 +
drivers/dma/qoriq-qdma.c | 900 +++++++++++++++++++++++++++++++++++++++++++++++
drivers/dma/qoriq-qdma.h | 272 ++++++++++++++
4 files changed, 1185 insertions(+)
create mode 100644 drivers/dma/qoriq-qdma.c
create mode 100644 drivers/dma/qoriq-qdma.h
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 739f797..a1d8c05 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -193,6 +193,18 @@ config FSL_EDMA
multiplexing capability for DMA request sources(slot).
This module can be found on Freescale Vybrid and LS-1 SoCs.
+config QORIQ_QDMA
+ tristate "QorIQ qDMA engine support"
+ select DMA_ENGINE
+ select DMA_VIRTUAL_CHANNELS
+ select DMA_ENGINE_RAID
+ select ASYNC_TX_ENABLE_CHANNEL_SWITCH
+ help
+ Support the QorIQ qDMA engine with command queue mode.
+ Channel virtualization is supported through enqueuing of DMA jobs to,
+ or dequeuing DMA jobs from, different work queues.
+ This module can be found on some QorIQ SoCs.
+
config FSL_RAID
tristate "Freescale RAID engine Support"
depends on FSL_SOC && !ASYNC_TX_ENABLE_CHANNEL_SWITCH
diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
index e4dc9ca..9c8d0a7 100644
--- a/drivers/dma/Makefile
+++ b/drivers/dma/Makefile
@@ -29,6 +29,7 @@ obj-$(CONFIG_DW_DMAC_CORE) += dw/
obj-$(CONFIG_EP93XX_DMA) += ep93xx_dma.o
obj-$(CONFIG_FSL_DMA) += fsldma.o
obj-$(CONFIG_FSL_EDMA) += fsl-edma.o
+obj-$(CONFIG_QORIQ_QDMA) += qoriq-qdma.o
obj-$(CONFIG_FSL_RAID) += fsl_raid.o
obj-$(CONFIG_HSU_DMA) += hsu/
obj-$(CONFIG_IMG_MDC_DMA) += img-mdc-dma.o
diff --git a/drivers/dma/qoriq-qdma.c b/drivers/dma/qoriq-qdma.c
new file mode 100644
index 0000000..53d8809
--- /dev/null
+++ b/drivers/dma/qoriq-qdma.c
@@ -0,0 +1,900 @@
+/*
+ * drivers/dma/qoriq-qdma.c
+ *
+ * Copyright 2015-2016 NXP Semiconductor, Inc.
+ *
+ * Driver for the QorIQ qDMA engine with software command queue mode.
+ * Channel virtualization is supported through enqueuing of DMA jobs to,
+ * or dequeuing DMA jobs from, different work queues.
+ * This module can be found on some QorIQ SoCs.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <asm/cacheflush.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmapool.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/of_dma.h>
+#include <linux/of_irq.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+
+#include "qoriq-qdma.h"
+
+static unsigned int channels = 2;
+module_param(channels, uint, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(channels, "Number of channels supported by driver");
+
+static unsigned int status_sizes[FSL_QDMA_MAX_BLOCK], status_num;
+module_param_array(status_sizes, uint, &status_num,
+ S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(status_sizes, "Size of each status queue in bytes");
+
+static unsigned int queue_sizes[FSL_QDMA_MAX_QUEUE], queue_num;
+module_param_array(queue_sizes, uint, &queue_num,
+ S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(queue_sizes, "Size of each command queue in bytes");
+
+static void fsl_qdma_free_chan_resources(struct dma_chan *chan)
+{
+ struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
+ unsigned long flags;
+ LIST_HEAD(head);
+
+ spin_lock_irqsave(&fsl_chan->vchan.lock, flags);
+ vchan_get_all_descriptors(&fsl_chan->vchan, &head);
+ spin_unlock_irqrestore(&fsl_chan->vchan.lock, flags);
+
+ vchan_dma_desc_free_list(&fsl_chan->vchan, &head);
+}
+
+static void fsl_qdma_comp_fill_memcpy(struct fsl_qdma_comp *fsl_comp,
+ dma_addr_t dst, dma_addr_t src, u32 len)
+{
+ struct fsl_qdma_frame *frame;
+
+ memset(fsl_comp->virt_addr, 0, FSL_QDMA_BASE_BUFFER_SIZE);
+ frame = (struct fsl_qdma_frame *)fsl_comp->virt_addr;
+ /* Head Command Descriptor(Frame Descriptor) */
+ frame->ccdf.addr_low = lower_32_bits(fsl_comp->bus_addr + 16);
+ frame->ccdf.dd_q_addr_high = (upper_32_bits(fsl_comp->bus_addr + 16))
+ & QDMA_CCDF_ADDR_HIGH_MASK;
+ /* Compound S/G format */
+ frame->ccdf.format_offset = (0 << QDMA_CCDF_OFFSET_SHIFT) |
+ (0x1 << QDMA_CCDF_FORMAT_SHIFT);
+ /* Status notification is enqueued to status queue. */
+ frame->ccdf.ser_status = QDMA_CCDF_SER;
+
+ /* Compound Command Descriptor(Frame List Table) */
+ frame->csgf_desc.addr_low = lower_32_bits(fsl_comp->bus_addr + 64);
+ frame->csgf_desc.addr_high = upper_32_bits(fsl_comp->bus_addr + 64);
+ /* It must be 32 as Compound S/G Descriptor */
+ frame->csgf_desc.e_f_length = 32;
+ frame->csgf_src.addr_low = lower_32_bits(src);
+ frame->csgf_src.addr_high = upper_32_bits(src);
+ frame->csgf_src.e_f_length = len;
+ frame->csgf_dest.addr_low = lower_32_bits(dst);
+ frame->csgf_dest.addr_high = upper_32_bits(dst);
+ frame->csgf_dest.e_f_length = len;
+ /* This entry is the last entry. */
+ frame->csgf_dest.e_f_length |= QDMA_CSGF_F;
+ /* Descriptor Buffer */
+ frame->sdf.cmd = FSL_QDMA_CMD_RWTTYPE << FSL_QDMA_CMD_RWTTYPE_OFFSET;
+ frame->ddf.cmd = FSL_QDMA_CMD_RWTTYPE << FSL_QDMA_CMD_RWTTYPE_OFFSET;
+}
+
+static void fsl_qdma_comp_fill_sg(
+ struct fsl_qdma_comp *fsl_comp,
+ struct scatterlist *dst_sg, unsigned int dst_nents,
+ struct scatterlist *src_sg, unsigned int src_nents)
+{
+ struct fsl_qdma_csgf *csgf_sg;
+ struct fsl_qdma_sg *sg_block, *temp;
+ struct scatterlist *sg;
+ struct fsl_qdma_frame *frame;
+ dma_addr_t dma_address;
+ u64 total_src_len = 0;
+ u64 total_dst_len = 0;
+ u32 i;
+
+ memset(fsl_comp->virt_addr, 0, FSL_QDMA_BASE_BUFFER_SIZE);
+ frame = (struct fsl_qdma_frame *)fsl_comp->virt_addr;
+ /* Head Command Descriptor(Frame Descriptor) */
+ frame->ccdf.addr_low = lower_32_bits(fsl_comp->bus_addr + 16);
+ frame->ccdf.dd_q_addr_high = (upper_32_bits(fsl_comp->bus_addr + 16))
+ & QDMA_CCDF_ADDR_HIGH_MASK;
+ /* Compound S/G format */
+ frame->ccdf.format_offset |= 0x1 << QDMA_CCDF_FORMAT_SHIFT;
+ /* Status notification is enqueued to status queue. */
+ frame->ccdf.ser_status |= QDMA_CCDF_SER;
+
+ /* Compound Command Descriptor(Frame List Table) */
+ frame->csgf_desc.addr_low = lower_32_bits(fsl_comp->bus_addr + 64);
+ frame->csgf_desc.addr_high = upper_32_bits(fsl_comp->bus_addr + 64);
+ /* It must be 32 as Compound S/G Descriptor */
+ frame->csgf_desc.e_f_length = 32;
+
+ sg_block = fsl_comp->sg_block;
+ frame->csgf_src.addr_low = lower_32_bits(sg_block->bus_addr);
+ frame->csgf_src.addr_high = upper_32_bits(sg_block->bus_addr);
+ /* This entry link to the s/g entry. */
+ frame->csgf_src.e_f_length |= QDMA_CSGF_E;
+
+ temp = sg_block + fsl_comp->sg_block_src;
+ frame->csgf_dest.addr_low = lower_32_bits(temp->bus_addr);
+ frame->csgf_dest.addr_high = upper_32_bits(temp->bus_addr);
+ /* This entry is the last entry and link to the s/g entry. */
+ frame->csgf_dest.e_f_length |= QDMA_CSGF_F | QDMA_CSGF_E;
+
+ for_each_sg(src_sg, sg, src_nents, i) {
+ temp = sg_block + i / (FSL_QDMA_EXPECT_SG_ENTRY_NUM - 1);
+ csgf_sg = (struct fsl_qdma_csgf *)temp->virt_addr +
+ i % (FSL_QDMA_EXPECT_SG_ENTRY_NUM - 1);
+ dma_address = sg_dma_address(sg);
+ csgf_sg->addr_low = lower_32_bits(dma_address);
+ csgf_sg->addr_high = upper_32_bits(dma_address);
+ csgf_sg->e_f_length |= sg_dma_len(sg);
+ total_src_len += sg_dma_len(sg);
+
+ if (i == src_nents - 1)
+ csgf_sg->e_f_length |= QDMA_CSGF_F;
+ if (i % (FSL_QDMA_EXPECT_SG_ENTRY_NUM - 1) ==
+ FSL_QDMA_EXPECT_SG_ENTRY_NUM - 2) {
+ csgf_sg = (struct fsl_qdma_csgf *)temp->virt_addr +
+ FSL_QDMA_EXPECT_SG_ENTRY_NUM - 1;
+ temp = sg_block +
+ i / (FSL_QDMA_EXPECT_SG_ENTRY_NUM - 1) + 1;
+ csgf_sg->addr_low = lower_32_bits(temp->bus_addr);
+ csgf_sg->addr_high = upper_32_bits(temp->bus_addr);
+ csgf_sg->e_f_length |= QDMA_CSGF_E;
+ }
+ }
+
+ sg_block += fsl_comp->sg_block_src;
+ for_each_sg(dst_sg, sg, dst_nents, i) {
+ temp = sg_block + i / (FSL_QDMA_EXPECT_SG_ENTRY_NUM - 1);
+ csgf_sg = (struct fsl_qdma_csgf *)temp->virt_addr +
+ i % (FSL_QDMA_EXPECT_SG_ENTRY_NUM - 1);
+ dma_address = sg_dma_address(sg);
+ csgf_sg->addr_low = lower_32_bits(dma_address);
+ csgf_sg->addr_high = upper_32_bits(dma_address);
+ csgf_sg->e_f_length |= sg_dma_len(sg);
+ total_dst_len += sg_dma_len(sg);
+
+ if (i == dst_nents - 1)
+ csgf_sg->e_f_length |= QDMA_CSGF_F;
+ if (i % (FSL_QDMA_EXPECT_SG_ENTRY_NUM - 1) ==
+ FSL_QDMA_EXPECT_SG_ENTRY_NUM - 2) {
+ csgf_sg = (struct fsl_qdma_csgf *)temp->virt_addr +
+ FSL_QDMA_EXPECT_SG_ENTRY_NUM - 1;
+ temp = sg_block +
+ i / (FSL_QDMA_EXPECT_SG_ENTRY_NUM - 1) + 1;
+ csgf_sg->addr_low = lower_32_bits(temp->bus_addr);
+ csgf_sg->addr_high = upper_32_bits(temp->bus_addr);
+ csgf_sg->e_f_length |= QDMA_CSGF_E;
+ }
+ }
+
+ if (total_src_len != total_dst_len)
+ dev_err(&fsl_comp->qchan->vchan.chan.dev->device,
+ "The data length for src and dst isn't match.\n");
+
+ frame->csgf_src.e_f_length |= total_src_len;
+ frame->csgf_dest.e_f_length |= total_dst_len;
+
+ /* Descriptor Buffer */
+ frame->sdf.cmd = FSL_QDMA_CMD_RWTTYPE << FSL_QDMA_CMD_RWTTYPE_OFFSET;
+ frame->ddf.cmd = FSL_QDMA_CMD_RWTTYPE << FSL_QDMA_CMD_RWTTYPE_OFFSET;
+}
+
+/*
+ * Request a command descriptor for enqueue.
+ */
+static struct fsl_qdma_comp *fsl_qdma_request_enqueue_desc(
+ struct fsl_qdma_chan *fsl_chan,
+ unsigned int dst_nents,
+ unsigned int src_nents)
+{
+ struct fsl_qdma_comp *comp_temp;
+ struct fsl_qdma_sg *sg_block;
+ struct fsl_qdma_queue *queue = fsl_chan->queue;
+ unsigned long flags;
+ unsigned int dst_sg_entry_block, src_sg_entry_block, sg_entry_total, i;
+
+ spin_lock_irqsave(&queue->queue_lock, flags);
+ if (list_empty(&queue->comp_free)) {
+ spin_unlock_irqrestore(&queue->queue_lock, flags);
+ comp_temp = kzalloc(sizeof(*comp_temp), GFP_KERNEL);
+ if (!comp_temp)
+ return NULL;
+ comp_temp->virt_addr = dma_pool_alloc(queue->comp_pool,
+ GFP_NOWAIT,
+ &comp_temp->bus_addr);
+ if (!comp_temp->virt_addr)
+ return NULL;
+ } else {
+ comp_temp = list_first_entry(&queue->comp_free,
+ struct fsl_qdma_comp,
+ list);
+ list_del(&comp_temp->list);
+ spin_unlock_irqrestore(&queue->queue_lock, flags);
+ }
+
+ if (dst_nents != 0)
+ dst_sg_entry_block = dst_nents /
+ (FSL_QDMA_EXPECT_SG_ENTRY_NUM - 1) + 1;
+ else
+ dst_sg_entry_block = 0;
+
+ if (src_nents != 0)
+ src_sg_entry_block = src_nents /
+ (FSL_QDMA_EXPECT_SG_ENTRY_NUM - 1) + 1;
+ else
+ src_sg_entry_block = 0;
+
+ sg_entry_total = dst_sg_entry_block + src_sg_entry_block;
+ if (sg_entry_total) {
+ sg_block = kzalloc(sizeof(*sg_block) *
+ sg_entry_total,
+ GFP_KERNEL);
+ if (!sg_block)
+ return NULL;
+ comp_temp->sg_block = sg_block;
+ for (i = 0; i < sg_entry_total; i++) {
+ sg_block->virt_addr = dma_pool_alloc(queue->sg_pool,
+ GFP_NOWAIT,
+ &sg_block->bus_addr);
+ memset(sg_block->virt_addr, 0,
+ FSL_QDMA_EXPECT_SG_ENTRY_NUM * 16);
+ sg_block++;
+ }
+ }
+
+ comp_temp->sg_block_src = src_sg_entry_block;
+ comp_temp->sg_block_dst = dst_sg_entry_block;
+ comp_temp->qchan = fsl_chan;
+
+ return comp_temp;
+}
+
+static struct fsl_qdma_queue *fsl_qdma_alloc_queue_resources(
+ struct platform_device *pdev,
+ enum qdma_queue_type type)
+{
+ struct fsl_qdma_queue *queue_head, *queue_temp;
+ unsigned int *qdma_queue_sizes, qdma_queue_num;
+ int len, i;
+
+ if (type == QDMA_QUEUE) {
+ if (queue_num > FSL_QDMA_MAX_QUEUE) {
+ dev_warn(&pdev->dev,
+ "The max number of the queues is: %d\n",
+ FSL_QDMA_MAX_QUEUE);
+ queue_num = FSL_QDMA_MAX_QUEUE;
+ }
+
+ if (queue_num == 0) {
+ dev_warn(&pdev->dev,
+ "The number of the queues can't be 0\n");
+ queue_num = 1;
+ }
+ qdma_queue_sizes = queue_sizes;
+ qdma_queue_num = queue_num;
+ } else if (type == QDMA_STATUS) {
+ if (status_num > FSL_QDMA_MAX_BLOCK) {
+ dev_warn(&pdev->dev,
+ "The max number of the queues is: %d\n",
+ FSL_QDMA_MAX_BLOCK);
+ status_num = FSL_QDMA_MAX_BLOCK;
+ }
+
+ if (status_num == 0) {
+ dev_warn(&pdev->dev,
+ "The number of the queues can't be 0\n");
+ status_num = 1;
+ }
+ qdma_queue_sizes = status_sizes;
+ qdma_queue_num = status_num;
+ } else {
+ return NULL;
+ }
+
+ len = sizeof(*queue_head) * qdma_queue_num;
+ queue_head = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
+ if (!queue_head)
+ return NULL;
+
+ for (i = 0; i < qdma_queue_num; i++) {
+ if (qdma_queue_sizes[i] > FSL_QDMA_CIRCULAR_SIZE_MAX
+ || qdma_queue_sizes[i] < FSL_QDMA_CIRCULAR_SIZE_MIN) {
+ dev_warn(&pdev->dev, "The wrong queue sizes\n");
+ qdma_queue_sizes[i] = FSL_QDMA_CIRCULAR_SIZE_MIN;
+ }
+ queue_temp = queue_head + i;
+ queue_temp->cq = dma_alloc_coherent(&pdev->dev,
+ sizeof(struct fsl_qdma_ccdf) *
+ qdma_queue_sizes[i],
+ &queue_temp->bus_addr,
+ GFP_KERNEL);
+ if (!queue_temp->cq)
+ return NULL;
+ queue_temp->n_cq = qdma_queue_sizes[i];
+ queue_temp->id = i;
+ queue_temp->virt_head = queue_temp->cq;
+ queue_temp->virt_tail = queue_temp->cq;
+
+ /*
+ * There is no dma pool need for status queue.
+ */
+ if (type == QDMA_STATUS) {
+ queue_temp->comp_pool = NULL;
+ queue_temp->sg_pool = NULL;
+ continue;
+ }
+
+ /*
+ * The dma pool for queue command buffer.
+ */
+ queue_temp->comp_pool = dma_pool_create("comp_pool",
+ &pdev->dev,
+ FSL_QDMA_BASE_BUFFER_SIZE,
+ 16, 0);
+ if (!queue_temp->comp_pool) {
+ dma_free_coherent(&pdev->dev,
+ sizeof(struct fsl_qdma_ccdf) *
+ qdma_queue_sizes[i],
+ queue_temp->cq,
+ queue_temp->bus_addr);
+ return NULL;
+ }
+ /*
+ * The dma pool for queue command buffer.
+ */
+ queue_temp->sg_pool = dma_pool_create("sg_pool",
+ &pdev->dev,
+ FSL_QDMA_EXPECT_SG_ENTRY_NUM * 16,
+ 64, 0);
+ if (!queue_temp->sg_pool) {
+ dma_free_coherent(&pdev->dev,
+ sizeof(struct fsl_qdma_ccdf) *
+ qdma_queue_sizes[i],
+ queue_temp->cq,
+ queue_temp->bus_addr);
+ dma_pool_destroy(queue_temp->comp_pool);
+ return NULL;
+ }
+ /*
+ * List for queue command buffer.
+ */
+ INIT_LIST_HEAD(&queue_temp->comp_used);
+ INIT_LIST_HEAD(&queue_temp->comp_free);
+ spin_lock_init(&queue_temp->queue_lock);
+ }
+
+ return queue_head;
+}
+
+static int fsl_qdma_halt(struct fsl_qdma_engine *fsl_qdma)
+{
+ void __iomem *ctrl = fsl_qdma->ctrl_base;
+ void __iomem *block = fsl_qdma->block_base;
+ int i, count = 5;
+ u32 reg;
+
+ /* Disable the command queue and wait for idle state. */
+ reg = qdma_readl(fsl_qdma, ctrl + FSL_QDMA_DMR);
+ reg |= FSL_QDMA_DMR_DQD;
+ qdma_writel(fsl_qdma, reg, ctrl + FSL_QDMA_DMR);
+ for (i = 0; i < FSL_QDMA_MAX_QUEUE; i++)
+ qdma_writel(fsl_qdma, 0, block + FSL_QDMA_BCQMR(i));
+
+ while (1) {
+ reg = qdma_readl(fsl_qdma, ctrl + FSL_QDMA_DSR);
+ if (!(reg & FSL_QDMA_DSR_DB))
+ break;
+ if (count-- < 0)
+ return -EBUSY;
+ udelay(100);
+ }
+
+ /* Disable status queue. */
+ qdma_writel(fsl_qdma, 0, block + FSL_QDMA_BSQMR);
+
+ /*
+ * Clear the command queue interrupt detect register for all queues.
+ */
+ qdma_writel(fsl_qdma, 0xffffffff, block + FSL_QDMA_BCQIDR(0));
+
+ return 0;
+}
+
+static void fsl_qdma_queue_complete(struct fsl_qdma_engine *fsl_qdma,
+ enum dma_status status)
+{
+ struct fsl_qdma_queue *fsl_queue = fsl_qdma->queue;
+ struct fsl_qdma_queue *fsl_status = fsl_qdma->status;
+ struct fsl_qdma_queue *temp_queue;
+ struct fsl_qdma_comp *fsl_comp;
+ struct fsl_qdma_ccdf *status_addr;
+ void __iomem *block = fsl_qdma->block_base;
+ u64 bus_addr;
+ u32 reg, i;
+
+ while (1) {
+ status_addr = fsl_status->virt_head;
+ /*
+ * Sacn all the queues.
+ * Match which queue completed this transfer.
+ */
+ for (i = 0; i < fsl_qdma->n_queues; i++) {
+ temp_queue = fsl_queue + i;
+ if (list_empty(&temp_queue->comp_used))
+ continue;
+ fsl_comp = list_first_entry(&temp_queue->comp_used,
+ struct fsl_qdma_comp,
+ list);
+ bus_addr = status_addr->dd_q_addr_high
+ & QDMA_CCDF_ADDR_HIGH_MASK;
+ bus_addr = bus_addr << 32 | status_addr->addr_low;
+ if (fsl_comp->bus_addr + 16 != (dma_addr_t)bus_addr)
+ continue;
+ spin_lock(&temp_queue->queue_lock);
+ list_del(&fsl_comp->list);
+ spin_unlock(&temp_queue->queue_lock);
+
+ reg = qdma_readl(fsl_qdma, block + FSL_QDMA_BSQMR);
+ reg |= FSL_QDMA_BSQMR_DI;
+ qdma_writel(fsl_qdma, reg, block + FSL_QDMA_BSQMR);
+ fsl_status->virt_head++;
+ if (fsl_status->virt_head == fsl_status->cq +
+ fsl_status->n_cq)
+ fsl_status->virt_head = fsl_status->cq;
+
+ spin_lock(&fsl_comp->qchan->vchan.lock);
+ if (status == DMA_COMPLETE)
+ vchan_cookie_complete(&fsl_comp->vdesc);
+ fsl_comp->qchan->status = status;
+
+ spin_unlock(&fsl_comp->qchan->vchan.lock);
+ break;
+ }
+ reg = qdma_readl(fsl_qdma, block + FSL_QDMA_BSQSR);
+ if (reg & FSL_QDMA_BSQSR_QE)
+ break;
+ if (i == fsl_qdma->n_queues) {
+ /*
+ * QDMA can't find the corresponding completed queue.
+ */
+ return;
+ }
+ }
+}
+
+static irqreturn_t fsl_qdma_error_handler(int irq, void *dev_id)
+{
+ struct fsl_qdma_engine *fsl_qdma = dev_id;
+ unsigned int intr;
+ void __iomem *ctrl = fsl_qdma->ctrl_base;
+
+ intr = qdma_readl(fsl_qdma, ctrl + FSL_QDMA_DEDR);
+
+ if (!intr)
+ return IRQ_NONE;
+
+ fsl_qdma_queue_complete(fsl_qdma, DMA_ERROR);
+ qdma_writel(fsl_qdma, 0xffffffff, ctrl + FSL_QDMA_DEDR);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t fsl_qdma_queue_handler(int irq, void *dev_id)
+{
+ struct fsl_qdma_engine *fsl_qdma = dev_id;
+ unsigned int intr, intr_err;
+ void __iomem *block = fsl_qdma->block_base;
+ void __iomem *ctrl = fsl_qdma->ctrl_base;
+ int ret = IRQ_NONE;
+
+ intr = qdma_readl(fsl_qdma, block + FSL_QDMA_BCQIDR(0));
+ intr_err = qdma_readl(fsl_qdma, ctrl + FSL_QDMA_DEDR);
+
+ if ((intr & FSL_QDMA_CQIDR_SQT) != 0) {
+ if (intr_err) {
+ fsl_qdma_queue_complete(fsl_qdma, DMA_ERROR);
+ qdma_writel(fsl_qdma, 0xffffffff, ctrl + FSL_QDMA_DEDR);
+ } else
+ fsl_qdma_queue_complete(fsl_qdma, DMA_COMPLETE);
+ ret = IRQ_HANDLED;
+ }
+
+ qdma_writel(fsl_qdma, 0xffffffff, block + FSL_QDMA_BCQIDR(0));
+ return ret;
+}
+
+static int
+fsl_qdma_irq_init(struct platform_device *pdev,
+ struct fsl_qdma_engine *fsl_qdma)
+{
+ int ret;
+
+ fsl_qdma->error_irq = platform_get_irq_byname(pdev,
+ "qdma-error");
+ if (fsl_qdma->error_irq < 0) {
+ dev_err(&pdev->dev, "Can't get qdma controller irq.\n");
+ return fsl_qdma->error_irq;
+ }
+
+ fsl_qdma->queue_irq = platform_get_irq_byname(pdev, "qdma-queue");
+ if (fsl_qdma->queue_irq < 0) {
+ dev_err(&pdev->dev, "Can't get qdma queue irq.\n");
+ return fsl_qdma->queue_irq;
+ }
+
+ ret = devm_request_irq(&pdev->dev, fsl_qdma->error_irq,
+ fsl_qdma_error_handler, 0, "qDMA error", fsl_qdma);
+ if (ret) {
+ dev_err(&pdev->dev, "Can't register qDMA controller IRQ.\n");
+ return ret;
+ }
+ ret = devm_request_irq(&pdev->dev, fsl_qdma->queue_irq,
+ fsl_qdma_queue_handler, 0, "qDMA queue", fsl_qdma);
+ if (ret) {
+ dev_err(&pdev->dev, "Can't register qDMA queue IRQ.\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int fsl_qdma_reg_init(struct fsl_qdma_engine *fsl_qdma)
+{
+ struct fsl_qdma_queue *fsl_queue = fsl_qdma->queue;
+ struct fsl_qdma_queue *temp;
+ void __iomem *ctrl = fsl_qdma->ctrl_base;
+ void __iomem *block = fsl_qdma->block_base;
+ int i, ret;
+ u32 reg;
+
+ /* Try to halt the qDMA engine first. */
+ ret = fsl_qdma_halt(fsl_qdma);
+ if (ret) {
+ dev_err(fsl_qdma->dma_dev.dev, "DMA halt failed!");
+ return ret;
+ }
+
+ /*
+ * Clear the command queue interrupt detect register for all queues.
+ */
+ qdma_writel(fsl_qdma, 0xffffffff, block + FSL_QDMA_BCQIDR(0));
+
+ for (i = 0; i < fsl_qdma->n_queues; i++) {
+ temp = fsl_queue + i;
+ /*
+ * Initialize Command Queue registers to point to the first
+ * command descriptor in memory.
+ * Dequeue Pointer Address Registers
+ * Enqueue Pointer Address Registers
+ */
+ qdma_writel(fsl_qdma, temp->bus_addr,
+ block + FSL_QDMA_BCQDPA_SADDR(i));
+ qdma_writel(fsl_qdma, temp->bus_addr,
+ block + FSL_QDMA_BCQEPA_SADDR(i));
+
+ /* Initialize the queue mode. */
+ reg = FSL_QDMA_BCQMR_EN;
+ reg |= FSL_QDMA_BCQMR_CD_THLD(ilog2(temp->n_cq)-4);
+ reg |= FSL_QDMA_BCQMR_CQ_SIZE(ilog2(temp->n_cq)-6);
+ qdma_writel(fsl_qdma, reg, block + FSL_QDMA_BCQMR(i));
+ }
+
+ /*
+ * Initialize status queue registers to point to the first
+ * command descriptor in memory.
+ * Dequeue Pointer Address Registers
+ * Enqueue Pointer Address Registers
+ */
+ qdma_writel(fsl_qdma, fsl_qdma->status->bus_addr,
+ block + FSL_QDMA_SQEPAR);
+ qdma_writel(fsl_qdma, fsl_qdma->status->bus_addr,
+ block + FSL_QDMA_SQDPAR);
+ /* Initialize status queue interrupt. */
+ qdma_writel(fsl_qdma, FSL_QDMA_BCQIER_CQTIE,
+ block + FSL_QDMA_BCQIER(0));
+ qdma_writel(fsl_qdma, FSL_QDMA_BSQICR_ICEN | FSL_QDMA_BSQICR_ICST(1),
+ block + FSL_QDMA_BSQICR);
+ qdma_writel(fsl_qdma, FSL_QDMA_CQIER_MEIE | FSL_QDMA_CQIER_TEIE,
+ block + FSL_QDMA_CQIER);
+ /* Initialize controller interrupt register. */
+ qdma_writel(fsl_qdma, 0xffffffff, ctrl + FSL_QDMA_DEDR);
+ qdma_writel(fsl_qdma, 0xffffffff, ctrl + FSL_QDMA_DEIER);
+
+ /* Initialize the status queue mode. */
+ reg = FSL_QDMA_BSQMR_EN;
+ reg |= FSL_QDMA_BSQMR_CQ_SIZE(ilog2(fsl_qdma->status->n_cq)-6);
+ qdma_writel(fsl_qdma, reg, block + FSL_QDMA_BSQMR);
+
+ reg = qdma_readl(fsl_qdma, ctrl + FSL_QDMA_DMR);
+ reg &= ~FSL_QDMA_DMR_DQD;
+ qdma_writel(fsl_qdma, reg, ctrl + FSL_QDMA_DMR);
+
+ return 0;
+}
+
+static struct dma_async_tx_descriptor *fsl_qdma_prep_dma_sg(
+ struct dma_chan *chan,
+ struct scatterlist *dst_sg, unsigned int dst_nents,
+ struct scatterlist *src_sg, unsigned int src_nents,
+ unsigned long flags)
+{
+ struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
+ struct fsl_qdma_comp *fsl_comp;
+
+ fsl_comp = fsl_qdma_request_enqueue_desc(fsl_chan,
+ dst_nents,
+ src_nents);
+ fsl_qdma_comp_fill_sg(fsl_comp, dst_sg, dst_nents, src_sg, src_nents);
+
+ return vchan_tx_prep(&fsl_chan->vchan, &fsl_comp->vdesc, flags);
+}
+
+static struct dma_async_tx_descriptor *
+fsl_qdma_prep_memcpy(struct dma_chan *chan, dma_addr_t dst,
+ dma_addr_t src, size_t len, unsigned long flags)
+{
+ struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
+ struct fsl_qdma_comp *fsl_comp;
+
+ fsl_comp = fsl_qdma_request_enqueue_desc(fsl_chan, 0, 0);
+ fsl_qdma_comp_fill_memcpy(fsl_comp, dst, src, len);
+
+ return vchan_tx_prep(&fsl_chan->vchan, &fsl_comp->vdesc, flags);
+}
+
+static void fsl_qdma_enqueue_desc(struct fsl_qdma_chan *fsl_chan)
+{
+ void __iomem *block = fsl_chan->qdma->block_base;
+ struct fsl_qdma_queue *fsl_queue = fsl_chan->queue;
+ struct fsl_qdma_comp *fsl_comp;
+ struct virt_dma_desc *vdesc;
+ u32 reg;
+
+ reg = qdma_readl(fsl_chan->qdma, block + FSL_QDMA_BCQSR(fsl_queue->id));
+ if (reg & FSL_QDMA_BCQSR_QF)
+ return;
+ vdesc = vchan_next_desc(&fsl_chan->vchan);
+ if (!vdesc)
+ return;
+ list_del(&vdesc->node);
+ fsl_comp = to_fsl_qdma_comp(vdesc);
+
+ memcpy(fsl_queue->virt_head++, fsl_comp->virt_addr, 16);
+ if (fsl_queue->virt_head == fsl_queue->cq + fsl_queue->n_cq)
+ fsl_queue->virt_head = fsl_queue->cq;
+
+ list_add_tail(&fsl_comp->list, &fsl_queue->comp_used);
+ reg = qdma_readl(fsl_chan->qdma, block + FSL_QDMA_BCQMR(fsl_queue->id));
+ reg |= FSL_QDMA_BCQMR_EI;
+ qdma_writel(fsl_chan->qdma, reg, block + FSL_QDMA_BCQMR(fsl_queue->id));
+ fsl_chan->status = DMA_IN_PROGRESS;
+}
+
+static enum dma_status fsl_qdma_tx_status(struct dma_chan *chan,
+ dma_cookie_t cookie, struct dma_tx_state *txstate)
+{
+ return dma_cookie_status(chan, cookie, txstate);
+}
+
+static void fsl_qdma_free_desc(struct virt_dma_desc *vdesc)
+{
+ struct fsl_qdma_comp *fsl_comp;
+ struct fsl_qdma_queue *fsl_queue;
+ struct fsl_qdma_sg *sg_block;
+ unsigned long flags;
+ unsigned int i;
+
+ fsl_comp = to_fsl_qdma_comp(vdesc);
+ fsl_queue = fsl_comp->qchan->queue;
+
+ if (fsl_comp->sg_block) {
+ for (i = 0; i < fsl_comp->sg_block_src +
+ fsl_comp->sg_block_dst; i++) {
+ sg_block = fsl_comp->sg_block + i;
+ dma_pool_free(fsl_queue->sg_pool,
+ sg_block->virt_addr,
+ sg_block->bus_addr);
+ }
+ kfree(fsl_comp->sg_block);
+ }
+
+ spin_lock_irqsave(&fsl_queue->queue_lock, flags);
+ list_add_tail(&fsl_comp->list, &fsl_queue->comp_free);
+ spin_unlock_irqrestore(&fsl_queue->queue_lock, flags);
+}
+
+static void fsl_qdma_issue_pending(struct dma_chan *chan)
+{
+ struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
+ struct fsl_qdma_queue *fsl_queue = fsl_chan->queue;
+ unsigned long flags;
+
+ spin_lock_irqsave(&fsl_queue->queue_lock, flags);
+ spin_lock(&fsl_chan->vchan.lock);
+ if (vchan_issue_pending(&fsl_chan->vchan))
+ fsl_qdma_enqueue_desc(fsl_chan);
+ spin_unlock(&fsl_chan->vchan.lock);
+ spin_unlock_irqrestore(&fsl_queue->queue_lock, flags);
+}
+
+static int fsl_qdma_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct fsl_qdma_engine *fsl_qdma;
+ struct fsl_qdma_chan *fsl_chan;
+ struct resource *res;
+ int len, ret, i;
+
+ if (channels > FSL_QDMA_MAX_BLOCK * FSL_QDMA_MAX_QUEUE) {
+ dev_warn(&pdev->dev,
+ "The max number of the channels is: %d\n",
+ FSL_QDMA_MAX_BLOCK * FSL_QDMA_MAX_QUEUE);
+ channels = FSL_QDMA_MAX_BLOCK * FSL_QDMA_MAX_QUEUE;
+ }
+
+ len = sizeof(*fsl_qdma) + sizeof(*fsl_chan) * channels;
+ fsl_qdma = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
+ if (!fsl_qdma)
+ return -ENOMEM;
+
+ fsl_qdma->queue = fsl_qdma_alloc_queue_resources(pdev, QDMA_QUEUE);
+ if (!fsl_qdma->queue)
+ return -ENOMEM;
+
+ fsl_qdma->status = fsl_qdma_alloc_queue_resources(pdev, QDMA_STATUS);
+ if (!fsl_qdma->status)
+ return -ENOMEM;
+
+ fsl_qdma->n_chans = channels;
+ fsl_qdma->n_queues = queue_num;
+ mutex_init(&fsl_qdma->fsl_qdma_mutex);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ fsl_qdma->ctrl_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(fsl_qdma->ctrl_base))
+ return PTR_ERR(fsl_qdma->ctrl_base);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ fsl_qdma->block_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(fsl_qdma->block_base))
+ return PTR_ERR(fsl_qdma->block_base);
+
+ ret = fsl_qdma_irq_init(pdev, fsl_qdma);
+ if (ret)
+ return ret;
+
+ fsl_qdma->big_endian = of_property_read_bool(np, "big-endian");
+ INIT_LIST_HEAD(&fsl_qdma->dma_dev.channels);
+ for (i = 0; i < fsl_qdma->n_chans; i++) {
+ struct fsl_qdma_chan *fsl_chan = &fsl_qdma->chans[i];
+
+ fsl_chan->qdma = fsl_qdma;
+ fsl_chan->queue = fsl_qdma->queue;
+ fsl_chan->vchan.desc_free = fsl_qdma_free_desc;
+ INIT_LIST_HEAD(&fsl_chan->qcomp);
+ vchan_init(&fsl_chan->vchan, &fsl_qdma->dma_dev);
+ }
+
+ dma_cap_set(DMA_MEMCPY, fsl_qdma->dma_dev.cap_mask);
+ dma_cap_set(DMA_SG, fsl_qdma->dma_dev.cap_mask);
+
+ fsl_qdma->dma_dev.dev = &pdev->dev;
+ fsl_qdma->dma_dev.device_free_chan_resources
+ = fsl_qdma_free_chan_resources;
+ fsl_qdma->dma_dev.device_tx_status = fsl_qdma_tx_status;
+ fsl_qdma->dma_dev.device_prep_dma_memcpy = fsl_qdma_prep_memcpy;
+ fsl_qdma->dma_dev.device_prep_dma_sg = fsl_qdma_prep_dma_sg;
+ fsl_qdma->dma_dev.device_issue_pending = fsl_qdma_issue_pending;
+
+ dma_set_mask(&pdev->dev, DMA_BIT_MASK(40));
+
+ platform_set_drvdata(pdev, fsl_qdma);
+
+ ret = dma_async_device_register(&fsl_qdma->dma_dev);
+ if (ret) {
+ dev_err(&pdev->dev, "Can't register QorIQ qDMA engine.\n");
+ return ret;
+ }
+
+ ret = fsl_qdma_reg_init(fsl_qdma);
+ if (ret) {
+ dev_err(&pdev->dev, "Can't Initialize the qDMA engine.\n");
+ return ret;
+ }
+
+
+ return 0;
+}
+
+static int fsl_qdma_remove(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct fsl_qdma_engine *fsl_qdma = platform_get_drvdata(pdev);
+ struct fsl_qdma_queue *queue_temp;
+ struct fsl_qdma_queue *status = fsl_qdma->status;
+ struct fsl_qdma_comp *comp_temp, *_comp_temp;
+ int i;
+
+ of_dma_controller_free(np);
+ dma_async_device_unregister(&fsl_qdma->dma_dev);
+
+ /* Free descriptor areas */
+ for (i = 0; i < fsl_qdma->n_queues; i++) {
+ queue_temp = fsl_qdma->queue + i;
+ list_for_each_entry_safe(comp_temp, _comp_temp,
+ &queue_temp->comp_used, list) {
+ dma_pool_free(queue_temp->comp_pool,
+ comp_temp->virt_addr,
+ comp_temp->bus_addr);
+ list_del(&comp_temp->list);
+ kfree(comp_temp);
+ }
+ list_for_each_entry_safe(comp_temp, _comp_temp,
+ &queue_temp->comp_free, list) {
+ dma_pool_free(queue_temp->comp_pool,
+ comp_temp->virt_addr,
+ comp_temp->bus_addr);
+ list_del(&comp_temp->list);
+ kfree(comp_temp);
+ }
+ dma_free_coherent(&pdev->dev, sizeof(struct fsl_qdma_ccdf) *
+ queue_temp->n_cq, queue_temp->cq,
+ queue_temp->bus_addr);
+ dma_pool_destroy(queue_temp->comp_pool);
+ }
+
+ dma_free_coherent(&pdev->dev, sizeof(struct fsl_qdma_ccdf) *
+ status->n_cq, status->cq, status->bus_addr);
+ return 0;
+}
+
+static const struct of_device_id fsl_qdma_dt_ids[] = {
+ { .compatible = "fsl,ls1021a-qdma", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, fsl_qdma_dt_ids);
+
+static struct platform_driver fsl_qdma_driver = {
+ .driver = {
+ .name = "fsl-qdma",
+ .owner = THIS_MODULE,
+ .of_match_table = fsl_qdma_dt_ids,
+ },
+ .probe = fsl_qdma_probe,
+ .remove = fsl_qdma_remove,
+};
+
+static int __init fsl_qdma_init(void)
+{
+ return platform_driver_register(&fsl_qdma_driver);
+}
+subsys_initcall(fsl_qdma_init);
+
+static void __exit fsl_qdma_exit(void)
+{
+ platform_driver_unregister(&fsl_qdma_driver);
+}
+module_exit(fsl_qdma_exit);
+
+MODULE_DESCRIPTION("QorIQ qDMA engine driver");
+MODULE_AUTHOR("Yuan Yao <yao.yuan at nxp.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/dma/qoriq-qdma.h b/drivers/dma/qoriq-qdma.h
new file mode 100644
index 0000000..0b827db
--- /dev/null
+++ b/drivers/dma/qoriq-qdma.h
@@ -0,0 +1,272 @@
+/*
+ * drivers/dma/qoriq-qdma.h
+ *
+ * Copyright 2015-2016 Freescale Semiconductor, Inc.
+ *
+ * Driver for the Freescale qDMA engine with software command queue mode.
+ * Channel virtualization is supported through enqueuing of DMA jobs to,
+ * or dequeuing DMA jobs from, different work queues.
+ * This module can be found on Freescale LS SoCs.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#ifndef __DMA_QORIQ_QDMA_H__
+#define __DMA_QORIQ_QDMA_H__
+
+#include "virt-dma.h"
+
+#define FSL_QDMA_DMR 0x0
+#define FSL_QDMA_DSR 0x4
+#define FSL_QDMA_DEIER 0x1e00
+#define FSL_QDMA_DEDR 0x1e04
+#define FSL_QDMA_DECFDW0R 0x1e10
+#define FSL_QDMA_DECFDW1R 0x1e14
+#define FSL_QDMA_DECFDW2R 0x1e18
+#define FSL_QDMA_DECFDW3R 0x1e1c
+#define FSL_QDMA_DECFQIDR 0x1e30
+#define FSL_QDMA_DECBR 0x1e34
+
+#define FSL_QDMA_BCQMR(x) (0xc0 + 0x100 * (x))
+#define FSL_QDMA_BCQSR(x) (0xc4 + 0x100 * (x))
+#define FSL_QDMA_BCQEDPA_SADDR(x) (0xc8 + 0x100 * (x))
+#define FSL_QDMA_BCQDPA_SADDR(x) (0xcc + 0x100 * (x))
+#define FSL_QDMA_BCQEEPA_SADDR(x) (0xd0 + 0x100 * (x))
+#define FSL_QDMA_BCQEPA_SADDR(x) (0xd4 + 0x100 * (x))
+#define FSL_QDMA_BCQIER(x) (0xe0 + 0x100 * (x))
+#define FSL_QDMA_BCQIDR(x) (0xe4 + 0x100 * (x))
+
+#define FSL_QDMA_SQDPAR 0x80c
+#define FSL_QDMA_SQEPAR 0x814
+#define FSL_QDMA_BSQMR 0x800
+#define FSL_QDMA_BSQSR 0x804
+#define FSL_QDMA_BSQICR 0x828
+#define FSL_QDMA_CQMR 0xa00
+#define FSL_QDMA_CQDSCR1 0xa08
+#define FSL_QDMA_CQDSCR2 0xa0c
+#define FSL_QDMA_CQIER 0xa10
+#define FSL_QDMA_CQEDR 0xa14
+
+#define FSL_QDMA_SQICR_ICEN
+
+#define FSL_QDMA_CQIDR_CQT 0xff000000
+#define FSL_QDMA_CQIDR_SQPE 0x800000
+#define FSL_QDMA_CQIDR_SQT 0x8000
+
+#define FSL_QDMA_BCQIER_CQTIE 0x8000
+#define FSL_QDMA_BCQIER_CQPEIE 0x800000
+#define FSL_QDMA_BSQICR_ICEN 0x80000000
+#define FSL_QDMA_BSQICR_ICST(x) ((x) << 16)
+#define FSL_QDMA_CQIER_MEIE 0x80000000
+#define FSL_QDMA_CQIER_TEIE 0x1
+
+#define FSL_QDMA_BCQMR_EN 0x80000000
+#define FSL_QDMA_BCQMR_EI 0x40000000
+#define FSL_QDMA_BCQMR_CD_THLD(x) ((x) << 20)
+#define FSL_QDMA_BCQMR_CQ_SIZE(x) ((x) << 16)
+
+#define FSL_QDMA_BCQSR_QF 0x10000
+
+#define FSL_QDMA_BSQMR_EN 0x80000000
+#define FSL_QDMA_BSQMR_DI 0x40000000
+#define FSL_QDMA_BSQMR_CQ_SIZE(x) ((x) << 16)
+
+#define FSL_QDMA_BSQSR_QE 0x20000
+
+#define FSL_QDMA_DMR_DQD 0x40000000
+#define FSL_QDMA_DSR_DB 0x80000000
+
+#define FSL_QDMA_CMD_RWTTYPE 0x4
+
+#define FSL_QDMA_CMD_RWTTYPE_OFFSET 28
+#define FSL_QDMA_CMD_NS_OFFSET 27
+#define FSL_QDMA_CMD_DQOS_OFFSET 24
+#define FSL_QDMA_CMD_WTHROTL_OFFSET 20
+#define FSL_QDMA_CMD_DSEN_OFFSET 19
+#define FSL_QDMA_CMD_LWC_OFFSET 16
+
+#define FSL_QDMA_E_SG_TABLE 1
+#define FSL_QDMA_E_DATA_BUFFER 0
+
+#define FSL_QDMA_MAX_BLOCK 4
+#define FSL_QDMA_MAX_QUEUE 8
+#define FSL_QDMA_BASE_BUFFER_SIZE 96
+#define FSL_QDMA_EXPECT_SG_ENTRY_NUM 16
+#define FSL_QDMA_CIRCULAR_SIZE_MIN 64
+#define FSL_QDMA_CIRCULAR_SIZE_MAX 16384
+
+/*
+ * Descriptor bit shifts and masks.
+ */
+
+#define QDMA_CSGF_OFFSET_SHIFT 0
+#define QDMA_CSGF_OFFSET_MASK 0x1fff
+#define QDMA_CSGF_LENGTH_SHIFT 0
+#define QDMA_CSGF_LENGTH_MASK 0x3
+#define QDMA_CSGF_F (1UL << 30)
+#define QDMA_CSGF_E (1UL << 31)
+#define QDMA_CSGF_ADDR_LOW_MASK 0xffffffff
+#define QDMA_CSGF_ADDR_GIHG_SHIFT 0
+#define QDMA_CSGF_ADDR_HIGH_MASK 0xff
+
+#define QDMA_CCDF_STATUS_SHIFT 0
+#define QDMA_CCDF_STATUS_MASK 0xff
+#define QDMA_CCDF_SER (1UL << 30)
+#define QDMA_CCDF_OFFSET_SHIFT 20
+#define QDMA_CCDF_OFFSET_MASK 0x1ff
+#define QDMA_CCDF_FORMAT_SHIFT 29
+#define QDMA_CCDF_FORMAT_MASK 0x3
+#define QDMA_CCDF_ADDR_LOW_MASK 0xffffffff
+#define QDMA_CCDF_ADDR_GIHG_SHIFT 0
+#define QDMA_CCDF_ADDR_HIGH_MASK 0xff
+#define QDMA_CCDF_QUEUE_SHIFT 24
+#define QDMA_CCDF_QUEUE_MASK 0x3
+#define QDMA_CCDF_DD_SHIFT 30
+#define QDMA_CCDF_DD_MASK 0x2
+
+#define QDMA_SDF_SSD_SHIFT 0
+#define QDMA_SDF_SSD_MASK 0xfff
+#define QDMA_SDF_SSS_SHIFT 12
+#define QDMA_SDF_SSS_MASK 0xfff
+#define QDMA_SDF_CMD_MASK 0xffffffff
+
+#define QDMA_DDF_DSD_SHIFT 0
+#define QDMA_DDF_DSD_MASK 0xfff
+#define QDMA_DDF_DSS_SHIFT 12
+#define QDMA_DDF_DSS_MASK 0xfff
+#define QDMA_DDF_CMD_MASK 0xffffffff
+
+/*
+ * enum qdma_queue_type - QDMA queue type
+ * @QDMA_QUEUE: work command queue
+ * @QDMA_STATUS: work status queue
+ */
+enum qdma_queue_type {
+ QDMA_QUEUE,
+ QDMA_STATUS,
+};
+
+struct fsl_qdma_ccdf {
+ u32 ser_status;
+ u32 format_offset;
+ u32 addr_low;
+ u32 dd_q_addr_high;
+};
+
+struct fsl_qdma_csgf {
+ u32 offset;
+ u32 e_f_length;
+ u32 addr_low;
+ u32 addr_high;
+};
+
+struct fsl_qdma_sdf {
+ u32 rev1;
+ u32 sss_ssd;
+ u32 rev2;
+ u32 cmd;
+};
+
+struct fsl_qdma_ddf {
+ u32 rev1;
+ u32 dss_dsd;
+ u32 rev2;
+ u32 cmd;
+};
+
+struct fsl_qdma_chan {
+ struct virt_dma_chan vchan;
+ struct virt_dma_desc vdesc;
+ enum dma_status status;
+ u32 slave_id;
+ struct fsl_qdma_engine *qdma;
+ struct fsl_qdma_queue *queue;
+ struct list_head qcomp;
+};
+
+struct fsl_qdma_queue {
+ struct fsl_qdma_ccdf *virt_head;
+ struct fsl_qdma_ccdf *virt_tail;
+ struct list_head comp_used;
+ struct list_head comp_free;
+ struct dma_pool *comp_pool;
+ struct dma_pool *sg_pool;
+ spinlock_t queue_lock;
+ dma_addr_t bus_addr;
+ u32 n_cq;
+ u32 id;
+ struct fsl_qdma_ccdf *cq;
+};
+
+struct fsl_qdma_sg {
+ dma_addr_t bus_addr;
+ void *virt_addr;
+};
+
+struct fsl_qdma_comp {
+ dma_addr_t bus_addr;
+ void *virt_addr;
+ struct fsl_qdma_chan *qchan;
+ struct fsl_qdma_sg *sg_block;
+ struct virt_dma_desc vdesc;
+ struct list_head list;
+ u32 sg_block_src;
+ u32 sg_block_dst;
+};
+
+struct fsl_qdma_engine {
+ struct dma_device dma_dev;
+ void __iomem *ctrl_base;
+ void __iomem *block_base;
+ u32 n_chans;
+ u32 n_queues;
+ struct mutex fsl_qdma_mutex;
+ int error_irq;
+ int queue_irq;
+ bool big_endian;
+ struct fsl_qdma_queue *queue;
+ struct fsl_qdma_queue *status;
+ struct fsl_qdma_chan chans[];
+
+};
+
+struct fsl_qdma_frame {
+ struct fsl_qdma_ccdf ccdf;
+ struct fsl_qdma_csgf csgf_desc;
+ struct fsl_qdma_csgf csgf_src;
+ struct fsl_qdma_csgf csgf_dest;
+ struct fsl_qdma_sdf sdf;
+ struct fsl_qdma_ddf ddf;
+};
+
+static u32 qdma_readl(struct fsl_qdma_engine *qdma, u32 __iomem *addr)
+{
+ if (qdma->big_endian)
+ return ioread32be(addr);
+ else
+ return ioread32(addr);
+}
+
+static void qdma_writel(struct fsl_qdma_engine *qdma, u32 val,
+ u32 __iomem *addr)
+{
+ if (qdma->big_endian)
+ iowrite32be(val, addr);
+ else
+ iowrite32(val, addr);
+}
+
+static struct fsl_qdma_chan *to_fsl_qdma_chan(struct dma_chan *chan)
+{
+ return container_of(chan, struct fsl_qdma_chan, vchan.chan);
+}
+
+static struct fsl_qdma_comp *to_fsl_qdma_comp(struct virt_dma_desc *vd)
+{
+ return container_of(vd, struct fsl_qdma_comp, vdesc);
+}
+
+#endif /* __DMA_QORIQ_QDMA_H__ */
--
2.1.0.27.g96db324
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