OpenWrt – Rev 4
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From 515d590e3d5313110faa4f2c86f7784d9b070fa9 Mon Sep 17 00:00:00 2001
From: Yangbo Lu <yangbo.lu@nxp.com>
Date: Wed, 17 Jan 2018 15:30:59 +0800
Subject: [PATCH 17/30] dma: support layerscape
This is an integrated patch for layerscape dma support.
Signed-off-by: jiaheng.fan <jiaheng.fan@nxp.com>
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
---
drivers/dma/Kconfig | 31 +
drivers/dma/Makefile | 3 +
drivers/dma/caam_dma.c | 563 ++++++++++++++
drivers/dma/dpaa2-qdma/Kconfig | 8 +
drivers/dma/dpaa2-qdma/Makefile | 8 +
drivers/dma/dpaa2-qdma/dpaa2-qdma.c | 986 ++++++++++++++++++++++++
drivers/dma/dpaa2-qdma/dpaa2-qdma.h | 262 +++++++
drivers/dma/dpaa2-qdma/dpdmai.c | 454 +++++++++++
drivers/dma/dpaa2-qdma/fsl_dpdmai.h | 521 +++++++++++++
drivers/dma/dpaa2-qdma/fsl_dpdmai_cmd.h | 222 ++++++
drivers/dma/fsl-qdma.c | 1243 +++++++++++++++++++++++++++++++
11 files changed, 4301 insertions(+)
create mode 100644 drivers/dma/caam_dma.c
create mode 100644 drivers/dma/dpaa2-qdma/Kconfig
create mode 100644 drivers/dma/dpaa2-qdma/Makefile
create mode 100644 drivers/dma/dpaa2-qdma/dpaa2-qdma.c
create mode 100644 drivers/dma/dpaa2-qdma/dpaa2-qdma.h
create mode 100644 drivers/dma/dpaa2-qdma/dpdmai.c
create mode 100644 drivers/dma/dpaa2-qdma/fsl_dpdmai.h
create mode 100644 drivers/dma/dpaa2-qdma/fsl_dpdmai_cmd.h
create mode 100644 drivers/dma/fsl-qdma.c
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -192,6 +192,20 @@ config FSL_EDMA
multiplexing capability for DMA request sources(slot).
This module can be found on Freescale Vybrid and LS-1 SoCs.
+config FSL_QDMA
+ tristate "Freescale qDMA engine support"
+ select DMA_ENGINE
+ select DMA_VIRTUAL_CHANNELS
+ select DMA_ENGINE_RAID
+ select ASYNC_TX_ENABLE_CHANNEL_SWITCH
+ help
+ Support the Freescale qDMA engine with command queue and legacy 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.
+
+source drivers/dma/dpaa2-qdma/Kconfig
+
config FSL_RAID
tristate "Freescale RAID engine Support"
depends on FSL_SOC && !ASYNC_TX_ENABLE_CHANNEL_SWITCH
@@ -564,6 +578,23 @@ config ZX_DMA
help
Support the DMA engine for ZTE ZX296702 platform devices.
+config CRYPTO_DEV_FSL_CAAM_DMA
+ tristate "CAAM DMA engine support"
+ depends on CRYPTO_DEV_FSL_CAAM_JR
+ default y
+ select DMA_ENGINE
+ select ASYNC_CORE
+ select ASYNC_TX_ENABLE_CHANNEL_SWITCH
+ help
+ Selecting this will offload the DMA operations for users of
+ the scatter gather memcopy API to the CAAM via job rings. The
+ CAAM is a hardware module that provides hardware acceleration to
+ cryptographic operations. It has a built-in DMA controller that can
+ be programmed to read/write cryptographic data. This module defines
+ a DMA driver that uses the DMA capabilities of the CAAM.
+
+ To compile this as a module, choose M here: the module
+ will be called caam_dma.
# driver files
source "drivers/dma/bestcomm/Kconfig"
--- a/drivers/dma/Makefile
+++ b/drivers/dma/Makefile
@@ -29,6 +29,8 @@ 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-$(CONFIG_FSL_QDMA) += fsl-qdma.o
+obj-$(CONFIG_FSL_DPAA2_QDMA) += dpaa2-qdma/
obj-$(CONFIG_FSL_RAID) += fsl_raid.o
obj-$(CONFIG_HSU_DMA) += hsu/
obj-$(CONFIG_IMG_MDC_DMA) += img-mdc-dma.o
@@ -67,6 +69,7 @@ obj-$(CONFIG_TI_DMA_CROSSBAR) += ti-dma-
obj-$(CONFIG_TI_EDMA) += edma.o
obj-$(CONFIG_XGENE_DMA) += xgene-dma.o
obj-$(CONFIG_ZX_DMA) += zx296702_dma.o
+obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_DMA) += caam_dma.o
obj-y += qcom/
obj-y += xilinx/
--- /dev/null
+++ b/drivers/dma/caam_dma.c
@@ -0,0 +1,563 @@
+/*
+ * caam support for SG DMA
+ *
+ * Copyright 2016 Freescale Semiconductor, Inc
+ * Copyright 2017 NXP
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/debugfs.h>
+
+#include <linux/dmaengine.h>
+#include "dmaengine.h"
+
+#include "../crypto/caam/regs.h"
+#include "../crypto/caam/jr.h"
+#include "../crypto/caam/error.h"
+#include "../crypto/caam/intern.h"
+#include "../crypto/caam/desc_constr.h"
+#include "../crypto/caam/sg_sw_sec4.h"
+
+#define DESC_DMA_MEMCPY_LEN ((CAAM_DESC_BYTES_MAX - DESC_JOB_IO_LEN) / \
+ CAAM_CMD_SZ)
+
+/* This is max chunk size of a DMA transfer. If a buffer is larger than this
+ * value it is internally broken into chunks of max CAAM_DMA_CHUNK_SIZE bytes
+ * and for each chunk a DMA transfer request is issued.
+ * This value is the largest number on 16 bits that is a multiple of 256 bytes
+ * (the largest configurable CAAM DMA burst size).
+ */
+#define CAAM_DMA_CHUNK_SIZE 65280
+
+struct caam_dma_sh_desc {
+ u32 desc[DESC_DMA_MEMCPY_LEN] ____cacheline_aligned;
+ dma_addr_t desc_dma;
+};
+
+/* caam dma extended descriptor */
+struct caam_dma_edesc {
+ struct dma_async_tx_descriptor async_tx;
+ struct list_head node;
+ struct caam_dma_ctx *ctx;
+ dma_addr_t src_dma;
+ dma_addr_t dst_dma;
+ unsigned int src_len;
+ unsigned int dst_len;
+ struct sec4_sg_entry *sec4_sg;
+ u32 jd[] ____cacheline_aligned;
+};
+
+/*
+ * caam_dma_ctx - per jr/channel context
+ * @chan: dma channel used by async_tx API
+ * @node: list_head used to attach to the global dma_ctx_list
+ * @jrdev: Job Ring device
+ * @submit_q: queue of pending (submitted, but not enqueued) jobs
+ * @done_not_acked: jobs that have been completed by jr, but maybe not acked
+ * @edesc_lock: protects extended descriptor
+ */
+struct caam_dma_ctx {
+ struct dma_chan chan;
+ struct list_head node;
+ struct device *jrdev;
+ struct list_head submit_q;
+ struct list_head done_not_acked;
+ spinlock_t edesc_lock;
+};
+
+static struct dma_device *dma_dev;
+static struct caam_dma_sh_desc *dma_sh_desc;
+static LIST_HEAD(dma_ctx_list);
+
+static dma_cookie_t caam_dma_tx_submit(struct dma_async_tx_descriptor *tx)
+{
+ struct caam_dma_edesc *edesc = NULL;
+ struct caam_dma_ctx *ctx = NULL;
+ dma_cookie_t cookie;
+
+ edesc = container_of(tx, struct caam_dma_edesc, async_tx);
+ ctx = container_of(tx->chan, struct caam_dma_ctx, chan);
+
+ spin_lock_bh(&ctx->edesc_lock);
+
+ cookie = dma_cookie_assign(tx);
+ list_add_tail(&edesc->node, &ctx->submit_q);
+
+ spin_unlock_bh(&ctx->edesc_lock);
+
+ return cookie;
+}
+
+static unsigned int caam_dma_sg_dma_len(struct scatterlist *sg,
+ unsigned int nents)
+{
+ unsigned int len;
+
+ for (len = 0; sg && nents; sg = sg_next(sg), nents--)
+ len += sg_dma_len(sg);
+
+ return len;
+}
+
+static struct caam_dma_edesc *
+caam_dma_sg_edesc_alloc(struct dma_chan *chan,
+ struct scatterlist *dst_sg, unsigned int dst_nents,
+ struct scatterlist *src_sg, unsigned int src_nents,
+ unsigned long flags)
+{
+ struct caam_dma_ctx *ctx = container_of(chan, struct caam_dma_ctx,
+ chan);
+ struct device *jrdev = ctx->jrdev;
+ struct caam_dma_edesc *edesc;
+ struct sec4_sg_entry *sec4_sg;
+ dma_addr_t sec4_sg_dma_src;
+ unsigned int sec4_sg_bytes;
+
+ if (!dst_sg || !src_sg || !dst_nents || !src_nents)
+ return NULL;
+
+ sec4_sg_bytes = (src_nents + dst_nents) * sizeof(*sec4_sg);
+
+ edesc = kzalloc(sizeof(*edesc) + DESC_JOB_IO_LEN + sec4_sg_bytes,
+ GFP_DMA | GFP_NOWAIT);
+ if (!edesc)
+ return ERR_PTR(-ENOMEM);
+
+ edesc->src_len = caam_dma_sg_dma_len(src_sg, src_nents);
+ edesc->dst_len = caam_dma_sg_dma_len(dst_sg, dst_nents);
+ if (edesc->src_len != edesc->dst_len) {
+ dev_err(jrdev, "%s: src(%u) and dst(%u) len mismatch.\n",
+ __func__, edesc->src_len, edesc->dst_len);
+ kfree(edesc);
+ return ERR_PTR(-EINVAL);
+ }
+
+ dma_async_tx_descriptor_init(&edesc->async_tx, chan);
+ edesc->async_tx.tx_submit = caam_dma_tx_submit;
+ edesc->async_tx.flags = flags;
+ edesc->async_tx.cookie = -EBUSY;
+
+ /* Prepare SEC SGs */
+ edesc->sec4_sg = (void *)edesc + offsetof(struct caam_dma_edesc, jd) +
+ DESC_JOB_IO_LEN;
+
+ sec4_sg = edesc->sec4_sg;
+ sg_to_sec4_sg_last(src_sg, src_nents, sec4_sg, 0);
+
+ sec4_sg += src_nents;
+ sg_to_sec4_sg_last(dst_sg, dst_nents, sec4_sg, 0);
+
+ sec4_sg_dma_src = dma_map_single(jrdev, edesc->sec4_sg, sec4_sg_bytes,
+ DMA_TO_DEVICE);
+ if (dma_mapping_error(jrdev, sec4_sg_dma_src)) {
+ dev_err(jrdev, "error mapping segments to device\n");
+ kfree(edesc);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ edesc->src_dma = sec4_sg_dma_src;
+ edesc->dst_dma = sec4_sg_dma_src + src_nents * sizeof(*sec4_sg);
+ edesc->ctx = ctx;
+
+ return edesc;
+}
+
+static void caam_jr_chan_free_edesc(struct caam_dma_edesc *edesc)
+{
+ struct caam_dma_ctx *ctx = edesc->ctx;
+ struct caam_dma_edesc *_edesc = NULL;
+
+ spin_lock_bh(&ctx->edesc_lock);
+
+ list_add_tail(&edesc->node, &ctx->done_not_acked);
+ list_for_each_entry_safe(edesc, _edesc, &ctx->done_not_acked, node) {
+ if (async_tx_test_ack(&edesc->async_tx)) {
+ list_del(&edesc->node);
+ kfree(edesc);
+ }
+ }
+
+ spin_unlock_bh(&ctx->edesc_lock);
+}
+
+static void caam_dma_done(struct device *dev, u32 *hwdesc, u32 err,
+ void *context)
+{
+ struct caam_dma_edesc *edesc = context;
+ struct caam_dma_ctx *ctx = edesc->ctx;
+ dma_async_tx_callback callback;
+ void *callback_param;
+
+ if (err)
+ caam_jr_strstatus(ctx->jrdev, err);
+
+ dma_run_dependencies(&edesc->async_tx);
+
+ spin_lock_bh(&ctx->edesc_lock);
+ dma_cookie_complete(&edesc->async_tx);
+ spin_unlock_bh(&ctx->edesc_lock);
+
+ callback = edesc->async_tx.callback;
+ callback_param = edesc->async_tx.callback_param;
+
+ dma_descriptor_unmap(&edesc->async_tx);
+
+ caam_jr_chan_free_edesc(edesc);
+
+ if (callback)
+ callback(callback_param);
+}
+
+static void caam_dma_sg_init_job_desc(struct caam_dma_edesc *edesc)
+{
+ u32 *jd = edesc->jd;
+ u32 *sh_desc = dma_sh_desc->desc;
+ dma_addr_t desc_dma = dma_sh_desc->desc_dma;
+
+ /* init the job descriptor */
+ init_job_desc_shared(jd, desc_dma, desc_len(sh_desc), HDR_REVERSE);
+
+ /* set SEQIN PTR */
+ append_seq_in_ptr(jd, edesc->src_dma, edesc->src_len, LDST_SGF);
+
+ /* set SEQOUT PTR */
+ append_seq_out_ptr(jd, edesc->dst_dma, edesc->dst_len, LDST_SGF);
+
+#ifdef DEBUG
+ print_hex_dump(KERN_ERR, "caam dma desc@" __stringify(__LINE__) ": ",
+ DUMP_PREFIX_ADDRESS, 16, 4, jd, desc_bytes(jd), 1);
+#endif
+}
+
+/* This function can be called from an interrupt context */
+static struct dma_async_tx_descriptor *
+caam_dma_prep_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 caam_dma_edesc *edesc;
+
+ /* allocate extended descriptor */
+ edesc = caam_dma_sg_edesc_alloc(chan, dst_sg, dst_nents, src_sg,
+ src_nents, flags);
+ if (IS_ERR_OR_NULL(edesc))
+ return ERR_CAST(edesc);
+
+ /* Initialize job descriptor */
+ caam_dma_sg_init_job_desc(edesc);
+
+ return &edesc->async_tx;
+}
+
+static void caam_dma_memcpy_init_job_desc(struct caam_dma_edesc *edesc)
+{
+ u32 *jd = edesc->jd;
+ u32 *sh_desc = dma_sh_desc->desc;
+ dma_addr_t desc_dma = dma_sh_desc->desc_dma;
+
+ /* init the job descriptor */
+ init_job_desc_shared(jd, desc_dma, desc_len(sh_desc), HDR_REVERSE);
+
+ /* set SEQIN PTR */
+ append_seq_in_ptr(jd, edesc->src_dma, edesc->src_len, 0);
+
+ /* set SEQOUT PTR */
+ append_seq_out_ptr(jd, edesc->dst_dma, edesc->dst_len, 0);
+
+#ifdef DEBUG
+ print_hex_dump(KERN_ERR, "caam dma desc@" __stringify(__LINE__) ": ",
+ DUMP_PREFIX_ADDRESS, 16, 4, jd, desc_bytes(jd), 1);
+#endif
+}
+
+static struct dma_async_tx_descriptor *
+caam_dma_prep_memcpy(struct dma_chan *chan, dma_addr_t dst, dma_addr_t src,
+ size_t len, unsigned long flags)
+{
+ struct caam_dma_edesc *edesc;
+ struct caam_dma_ctx *ctx = container_of(chan, struct caam_dma_ctx,
+ chan);
+
+ edesc = kzalloc(sizeof(*edesc) + DESC_JOB_IO_LEN, GFP_DMA | GFP_NOWAIT);
+ if (!edesc)
+ return ERR_PTR(-ENOMEM);
+
+ dma_async_tx_descriptor_init(&edesc->async_tx, chan);
+ edesc->async_tx.tx_submit = caam_dma_tx_submit;
+ edesc->async_tx.flags = flags;
+ edesc->async_tx.cookie = -EBUSY;
+
+ edesc->src_dma = src;
+ edesc->src_len = len;
+ edesc->dst_dma = dst;
+ edesc->dst_len = len;
+ edesc->ctx = ctx;
+
+ caam_dma_memcpy_init_job_desc(edesc);
+
+ return &edesc->async_tx;
+}
+
+/* This function can be called in an interrupt context */
+static void caam_dma_issue_pending(struct dma_chan *chan)
+{
+ struct caam_dma_ctx *ctx = container_of(chan, struct caam_dma_ctx,
+ chan);
+ struct caam_dma_edesc *edesc, *_edesc;
+
+ spin_lock_bh(&ctx->edesc_lock);
+ list_for_each_entry_safe(edesc, _edesc, &ctx->submit_q, node) {
+ if (caam_jr_enqueue(ctx->jrdev, edesc->jd,
+ caam_dma_done, edesc) < 0)
+ break;
+ list_del(&edesc->node);
+ }
+ spin_unlock_bh(&ctx->edesc_lock);
+}
+
+static void caam_dma_free_chan_resources(struct dma_chan *chan)
+{
+ struct caam_dma_ctx *ctx = container_of(chan, struct caam_dma_ctx,
+ chan);
+ struct caam_dma_edesc *edesc, *_edesc;
+
+ spin_lock_bh(&ctx->edesc_lock);
+ list_for_each_entry_safe(edesc, _edesc, &ctx->submit_q, node) {
+ list_del(&edesc->node);
+ kfree(edesc);
+ }
+ list_for_each_entry_safe(edesc, _edesc, &ctx->done_not_acked, node) {
+ list_del(&edesc->node);
+ kfree(edesc);
+ }
+ spin_unlock_bh(&ctx->edesc_lock);
+}
+
+static int caam_dma_jr_chan_bind(void)
+{
+ struct device *jrdev;
+ struct caam_dma_ctx *ctx;
+ int bonds = 0;
+ int i;
+
+ for (i = 0; i < caam_jr_driver_probed(); i++) {
+ jrdev = caam_jridx_alloc(i);
+ if (IS_ERR(jrdev)) {
+ pr_err("job ring device %d allocation failed\n", i);
+ continue;
+ }
+
+ ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+ if (!ctx) {
+ caam_jr_free(jrdev);
+ continue;
+ }
+
+ ctx->chan.device = dma_dev;
+ ctx->chan.private = ctx;
+
+ ctx->jrdev = jrdev;
+
+ INIT_LIST_HEAD(&ctx->submit_q);
+ INIT_LIST_HEAD(&ctx->done_not_acked);
+ INIT_LIST_HEAD(&ctx->node);
+ spin_lock_init(&ctx->edesc_lock);
+
+ dma_cookie_init(&ctx->chan);
+
+ /* add the context of this channel to the context list */
+ list_add_tail(&ctx->node, &dma_ctx_list);
+
+ /* add this channel to the device chan list */
+ list_add_tail(&ctx->chan.device_node, &dma_dev->channels);
+
+ bonds++;
+ }
+
+ return bonds;
+}
+
+static inline void caam_jr_dma_free(struct dma_chan *chan)
+{
+ struct caam_dma_ctx *ctx = container_of(chan, struct caam_dma_ctx,
+ chan);
+
+ list_del(&ctx->node);
+ list_del(&chan->device_node);
+ caam_jr_free(ctx->jrdev);
+ kfree(ctx);
+}
+
+static void set_caam_dma_desc(u32 *desc)
+{
+ u32 *jmp_cmd;
+
+ /* dma shared descriptor */
+ init_sh_desc(desc, HDR_SHARE_NEVER | (1 << HDR_START_IDX_SHIFT));
+
+ /* REG1 = CAAM_DMA_CHUNK_SIZE */
+ append_math_add_imm_u32(desc, REG1, ZERO, IMM, CAAM_DMA_CHUNK_SIZE);
+
+ /* REG0 = SEQINLEN - CAAM_DMA_CHUNK_SIZE */
+ append_math_sub_imm_u32(desc, REG0, SEQINLEN, IMM, CAAM_DMA_CHUNK_SIZE);
+
+ /* if (REG0 > 0)
+ * jmp to LABEL1
+ */
+ jmp_cmd = append_jump(desc, JUMP_TEST_INVALL | JUMP_COND_MATH_N |
+ JUMP_COND_MATH_Z);
+
+ /* REG1 = SEQINLEN */
+ append_math_sub(desc, REG1, SEQINLEN, ZERO, CAAM_CMD_SZ);
+
+ /* LABEL1 */
+ set_jump_tgt_here(desc, jmp_cmd);
+
+ /* VARSEQINLEN = REG1 */
+ append_math_add(desc, VARSEQINLEN, REG1, ZERO, CAAM_CMD_SZ);
+
+ /* VARSEQOUTLEN = REG1 */
+ append_math_add(desc, VARSEQOUTLEN, REG1, ZERO, CAAM_CMD_SZ);
+
+ /* do FIFO STORE */
+ append_seq_fifo_store(desc, 0, FIFOST_TYPE_METADATA | LDST_VLF);
+
+ /* do FIFO LOAD */
+ append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS1 |
+ FIFOLD_TYPE_IFIFO | LDST_VLF);
+
+ /* if (REG0 > 0)
+ * jmp 0xF8 (after shared desc header)
+ */
+ append_jump(desc, JUMP_TEST_INVALL | JUMP_COND_MATH_N |
+ JUMP_COND_MATH_Z | 0xF8);
+
+#ifdef DEBUG
+ print_hex_dump(KERN_ERR, "caam dma shdesc@" __stringify(__LINE__) ": ",
+ DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
+#endif
+}
+
+static int __init caam_dma_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device *ctrldev = dev->parent;
+ struct dma_chan *chan, *_chan;
+ u32 *sh_desc;
+ int err = -ENOMEM;
+ int bonds;
+
+ if (!caam_jr_driver_probed()) {
+ dev_info(dev, "Defer probing after JR driver probing\n");
+ return -EPROBE_DEFER;
+ }
+
+ dma_dev = kzalloc(sizeof(*dma_dev), GFP_KERNEL);
+ if (!dma_dev)
+ return -ENOMEM;
+
+ dma_sh_desc = kzalloc(sizeof(*dma_sh_desc), GFP_KERNEL | GFP_DMA);
+ if (!dma_sh_desc)
+ goto desc_err;
+
+ sh_desc = dma_sh_desc->desc;
+ set_caam_dma_desc(sh_desc);
+ dma_sh_desc->desc_dma = dma_map_single(ctrldev, sh_desc,
+ desc_bytes(sh_desc),
+ DMA_TO_DEVICE);
+ if (dma_mapping_error(ctrldev, dma_sh_desc->desc_dma)) {
+ dev_err(dev, "unable to map dma descriptor\n");
+ goto map_err;
+ }
+
+ INIT_LIST_HEAD(&dma_dev->channels);
+
+ bonds = caam_dma_jr_chan_bind();
+ if (!bonds) {
+ err = -ENODEV;
+ goto jr_bind_err;
+ }
+
+ dma_dev->dev = dev;
+ dma_dev->residue_granularity = DMA_RESIDUE_GRANULARITY_DESCRIPTOR;
+ dma_cap_set(DMA_SG, dma_dev->cap_mask);
+ dma_cap_set(DMA_MEMCPY, dma_dev->cap_mask);
+ dma_cap_set(DMA_PRIVATE, dma_dev->cap_mask);
+ dma_dev->device_tx_status = dma_cookie_status;
+ dma_dev->device_issue_pending = caam_dma_issue_pending;
+ dma_dev->device_prep_dma_sg = caam_dma_prep_sg;
+ dma_dev->device_prep_dma_memcpy = caam_dma_prep_memcpy;
+ dma_dev->device_free_chan_resources = caam_dma_free_chan_resources;
+
+ err = dma_async_device_register(dma_dev);
+ if (err) {
+ dev_err(dev, "Failed to register CAAM DMA engine\n");
+ goto jr_bind_err;
+ }
+
+ dev_info(dev, "caam dma support with %d job rings\n", bonds);
+
+ return err;
+
+jr_bind_err:
+ list_for_each_entry_safe(chan, _chan, &dma_dev->channels, device_node)
+ caam_jr_dma_free(chan);
+
+ dma_unmap_single(ctrldev, dma_sh_desc->desc_dma, desc_bytes(sh_desc),
+ DMA_TO_DEVICE);
+map_err:
+ kfree(dma_sh_desc);
+desc_err:
+ kfree(dma_dev);
+ return err;
+}
+
+static int caam_dma_remove(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device *ctrldev = dev->parent;
+ struct caam_dma_ctx *ctx, *_ctx;
+
+ dma_async_device_unregister(dma_dev);
+
+ list_for_each_entry_safe(ctx, _ctx, &dma_ctx_list, node) {
+ list_del(&ctx->node);
+ caam_jr_free(ctx->jrdev);
+ kfree(ctx);
+ }
+
+ dma_unmap_single(ctrldev, dma_sh_desc->desc_dma,
+ desc_bytes(dma_sh_desc->desc), DMA_TO_DEVICE);
+
+ kfree(dma_sh_desc);
+ kfree(dma_dev);
+
+ dev_info(dev, "caam dma support disabled\n");
+ return 0;
+}
+
+static const struct of_device_id caam_dma_match[] = {
+ { .compatible = "fsl,sec-v5.4-dma", },
+ { .compatible = "fsl,sec-v5.0-dma", },
+ { .compatible = "fsl,sec-v4.0-dma", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, caam_dma_match);
+
+static struct platform_driver caam_dma_driver = {
+ .driver = {
+ .name = "caam-dma",
+ .of_match_table = caam_dma_match,
+ },
+ .probe = caam_dma_probe,
+ .remove = caam_dma_remove,
+};
+module_platform_driver(caam_dma_driver);
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_DESCRIPTION("NXP CAAM support for SG DMA");
+MODULE_AUTHOR("NXP Semiconductors");
--- /dev/null
+++ b/drivers/dma/dpaa2-qdma/Kconfig
@@ -0,0 +1,8 @@
+menuconfig FSL_DPAA2_QDMA
+ tristate "NXP DPAA2 QDMA"
+ depends on FSL_MC_BUS && FSL_MC_DPIO
+ select DMA_ENGINE
+ select DMA_VIRTUAL_CHANNELS
+ ---help---
+ NXP Data Path Acceleration Architecture 2 QDMA driver,
+ using the NXP MC bus driver.
--- /dev/null
+++ b/drivers/dma/dpaa2-qdma/Makefile
@@ -0,0 +1,8 @@
+#
+# Makefile for the NXP DPAA2 CAAM controllers
+#
+ccflags-y += -DVERSION=\"\"
+
+obj-$(CONFIG_FSL_DPAA2_QDMA) += fsl-dpaa2-qdma.o
+
+fsl-dpaa2-qdma-objs := dpaa2-qdma.o dpdmai.o
--- /dev/null
+++ b/drivers/dma/dpaa2-qdma/dpaa2-qdma.c
@@ -0,0 +1,986 @@
+/*
+ * drivers/dma/dpaa2-qdma/dpaa2-qdma.c
+ *
+ * Copyright 2015-2017 NXP Semiconductor, Inc.
+ * Author: Changming Huang <jerry.huang@nxp.com>
+ *
+ * Driver for the NXP QDMA engine with QMan mode.
+ * Channel virtualization is supported through enqueuing of DMA jobs to,
+ * or dequeuing DMA jobs from different work queues with QMan portal.
+ * This module can be found on NXP LS2 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 <linux/init.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmapool.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_dma.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/iommu.h>
+
+#include "../virt-dma.h"
+
+#include "../../../drivers/staging/fsl-mc/include/mc.h"
+#include "../../../drivers/staging/fsl-mc/include/dpaa2-io.h"
+#include "../../../drivers/staging/fsl-mc/include/dpaa2-fd.h"
+#include "fsl_dpdmai_cmd.h"
+#include "fsl_dpdmai.h"
+#include "dpaa2-qdma.h"
+
+static bool smmu_disable = true;
+
+static struct dpaa2_qdma_chan *to_dpaa2_qdma_chan(struct dma_chan *chan)
+{
+ return container_of(chan, struct dpaa2_qdma_chan, vchan.chan);
+}
+
+static struct dpaa2_qdma_comp *to_fsl_qdma_comp(struct virt_dma_desc *vd)
+{
+ return container_of(vd, struct dpaa2_qdma_comp, vdesc);
+}
+
+static int dpaa2_qdma_alloc_chan_resources(struct dma_chan *chan)
+{
+ return 0;
+}
+
+static void dpaa2_qdma_free_chan_resources(struct dma_chan *chan)
+{
+ struct dpaa2_qdma_chan *dpaa2_chan = to_dpaa2_qdma_chan(chan);
+ unsigned long flags;
+ LIST_HEAD(head);
+
+ spin_lock_irqsave(&dpaa2_chan->vchan.lock, flags);
+ vchan_get_all_descriptors(&dpaa2_chan->vchan, &head);
+ spin_unlock_irqrestore(&dpaa2_chan->vchan.lock, flags);
+
+ vchan_dma_desc_free_list(&dpaa2_chan->vchan, &head);
+}
+
+/*
+ * Request a command descriptor for enqueue.
+ */
+static struct dpaa2_qdma_comp *
+dpaa2_qdma_request_desc(struct dpaa2_qdma_chan *dpaa2_chan)
+{
+ struct dpaa2_qdma_comp *comp_temp = NULL;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dpaa2_chan->queue_lock, flags);
+ if (list_empty(&dpaa2_chan->comp_free)) {
+ spin_unlock_irqrestore(&dpaa2_chan->queue_lock, flags);
+ comp_temp = kzalloc(sizeof(*comp_temp), GFP_KERNEL);
+ if (!comp_temp)
+ goto err;
+ comp_temp->fd_virt_addr = dma_pool_alloc(dpaa2_chan->fd_pool,
+ GFP_NOWAIT, &comp_temp->fd_bus_addr);
+ if (!comp_temp->fd_virt_addr)
+ goto err;
+
+ comp_temp->fl_virt_addr =
+ (void *)((struct dpaa2_fd *)
+ comp_temp->fd_virt_addr + 1);
+ comp_temp->fl_bus_addr = comp_temp->fd_bus_addr +
+ sizeof(struct dpaa2_fd);
+ comp_temp->desc_virt_addr =
+ (void *)((struct dpaa2_frame_list *)
+ comp_temp->fl_virt_addr + 3);
+ comp_temp->desc_bus_addr = comp_temp->fl_bus_addr +
+ sizeof(struct dpaa2_frame_list) * 3;
+
+ comp_temp->qchan = dpaa2_chan;
+ comp_temp->sg_blk_num = 0;
+ INIT_LIST_HEAD(&comp_temp->sg_src_head);
+ INIT_LIST_HEAD(&comp_temp->sg_dst_head);
+ return comp_temp;
+ }
+ comp_temp = list_first_entry(&dpaa2_chan->comp_free,
+ struct dpaa2_qdma_comp, list);
+ list_del(&comp_temp->list);
+ spin_unlock_irqrestore(&dpaa2_chan->queue_lock, flags);
+
+ comp_temp->qchan = dpaa2_chan;
+err:
+ return comp_temp;
+}
+
+static void dpaa2_qdma_populate_fd(uint32_t format,
+ struct dpaa2_qdma_comp *dpaa2_comp)
+{
+ struct dpaa2_fd *fd;
+
+ fd = (struct dpaa2_fd *)dpaa2_comp->fd_virt_addr;
+ memset(fd, 0, sizeof(struct dpaa2_fd));
+
+ /* fd populated */
+ fd->simple.addr = dpaa2_comp->fl_bus_addr;
+ /* Bypass memory translation, Frame list format, short length disable */
+ /* we need to disable BMT if fsl-mc use iova addr */
+ if (smmu_disable)
+ fd->simple.bpid = QMAN_FD_BMT_ENABLE;
+ fd->simple.format_offset = QMAN_FD_FMT_ENABLE | QMAN_FD_SL_DISABLE;
+
+ fd->simple.frc = format | QDMA_SER_CTX;
+}
+
+/* first frame list for descriptor buffer */
+static void dpaa2_qdma_populate_first_framel(
+ struct dpaa2_frame_list *f_list,
+ struct dpaa2_qdma_comp *dpaa2_comp)
+{
+ struct dpaa2_qdma_sd_d *sdd;
+
+ sdd = (struct dpaa2_qdma_sd_d *)dpaa2_comp->desc_virt_addr;
+ memset(sdd, 0, 2 * (sizeof(*sdd)));
+ /* source and destination descriptor */
+ sdd->cmd = QDMA_SD_CMD_RDTTYPE_COHERENT; /* source descriptor CMD */
+ sdd++;
+ sdd->cmd = QDMA_DD_CMD_WRTTYPE_COHERENT; /* dest descriptor CMD */
+
+ memset(f_list, 0, sizeof(struct dpaa2_frame_list));
+ /* first frame list to source descriptor */
+ f_list->addr_lo = dpaa2_comp->desc_bus_addr;
+ f_list->addr_hi = (dpaa2_comp->desc_bus_addr >> 32);
+ f_list->data_len.data_len_sl0 = 0x20; /* source/destination desc len */
+ f_list->fmt = QDMA_FL_FMT_SBF; /* single buffer frame */
+ if (smmu_disable)
+ f_list->bmt = QDMA_FL_BMT_ENABLE; /* bypass memory translation */
+ f_list->sl = QDMA_FL_SL_LONG; /* long length */
+ f_list->f = 0; /* not the last frame list */
+}
+
+/* source and destination frame list */
+static void dpaa2_qdma_populate_frames(struct dpaa2_frame_list *f_list,
+ dma_addr_t dst, dma_addr_t src, size_t len, uint8_t fmt)
+{
+ /* source frame list to source buffer */
+ memset(f_list, 0, sizeof(struct dpaa2_frame_list));
+ f_list->addr_lo = src;
+ f_list->addr_hi = (src >> 32);
+ f_list->data_len.data_len_sl0 = len;
+ f_list->fmt = fmt; /* single buffer frame or scatter gather frame */
+ if (smmu_disable)
+ f_list->bmt = QDMA_FL_BMT_ENABLE; /* bypass memory translation */
+ f_list->sl = QDMA_FL_SL_LONG; /* long length */
+ f_list->f = 0; /* not the last frame list */
+
+ f_list++;
+ /* destination frame list to destination buffer */
+ memset(f_list, 0, sizeof(struct dpaa2_frame_list));
+ f_list->addr_lo = dst;
+ f_list->addr_hi = (dst >> 32);
+ f_list->data_len.data_len_sl0 = len;
+ f_list->fmt = fmt; /* single buffer frame or scatter gather frame */
+ if (smmu_disable)
+ f_list->bmt = QDMA_FL_BMT_ENABLE; /* bypass memory translation */
+ f_list->sl = QDMA_FL_SL_LONG; /* long length */
+ f_list->f = QDMA_FL_F; /* Final bit: 1, for last frame list */
+}
+
+static struct dma_async_tx_descriptor *dpaa2_qdma_prep_memcpy(
+ struct dma_chan *chan, dma_addr_t dst,
+ dma_addr_t src, size_t len, unsigned long flags)
+{
+ struct dpaa2_qdma_chan *dpaa2_chan = to_dpaa2_qdma_chan(chan);
+ struct dpaa2_qdma_comp *dpaa2_comp;
+ struct dpaa2_frame_list *f_list;
+ uint32_t format;
+
+ dpaa2_comp = dpaa2_qdma_request_desc(dpaa2_chan);
+
+#ifdef LONG_FORMAT
+ format = QDMA_FD_LONG_FORMAT;
+#else
+ format = QDMA_FD_SHORT_FORMAT;
+#endif
+ /* populate Frame descriptor */
+ dpaa2_qdma_populate_fd(format, dpaa2_comp);
+
+ f_list = (struct dpaa2_frame_list *)dpaa2_comp->fl_virt_addr;
+
+#ifdef LONG_FORMAT
+ /* first frame list for descriptor buffer (logn format) */
+ dpaa2_qdma_populate_first_framel(f_list, dpaa2_comp);
+
+ f_list++;
+#endif
+
+ dpaa2_qdma_populate_frames(f_list, dst, src, len, QDMA_FL_FMT_SBF);
+
+ return vchan_tx_prep(&dpaa2_chan->vchan, &dpaa2_comp->vdesc, flags);
+}
+
+static struct qdma_sg_blk *dpaa2_qdma_get_sg_blk(
+ struct dpaa2_qdma_comp *dpaa2_comp,
+ struct dpaa2_qdma_chan *dpaa2_chan)
+{
+ struct qdma_sg_blk *sg_blk = NULL;
+ dma_addr_t phy_sgb;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dpaa2_chan->queue_lock, flags);
+ if (list_empty(&dpaa2_chan->sgb_free)) {
+ sg_blk = (struct qdma_sg_blk *)dma_pool_alloc(
+ dpaa2_chan->sg_blk_pool,
+ GFP_NOWAIT, &phy_sgb);
+ if (!sg_blk) {
+ spin_unlock_irqrestore(&dpaa2_chan->queue_lock, flags);
+ return sg_blk;
+ }
+ sg_blk->blk_virt_addr = (void *)(sg_blk + 1);
+ sg_blk->blk_bus_addr = phy_sgb + sizeof(*sg_blk);
+ } else {
+ sg_blk = list_first_entry(&dpaa2_chan->sgb_free,
+ struct qdma_sg_blk, list);
+ list_del(&sg_blk->list);
+ }
+ spin_unlock_irqrestore(&dpaa2_chan->queue_lock, flags);
+
+ return sg_blk;
+}
+
+static uint32_t dpaa2_qdma_populate_sg(struct device *dev,
+ struct dpaa2_qdma_chan *dpaa2_chan,
+ struct dpaa2_qdma_comp *dpaa2_comp,
+ struct scatterlist *dst_sg, u32 dst_nents,
+ struct scatterlist *src_sg, u32 src_nents)
+{
+ struct dpaa2_qdma_sg *src_sge;
+ struct dpaa2_qdma_sg *dst_sge;
+ struct qdma_sg_blk *sg_blk;
+ struct qdma_sg_blk *sg_blk_dst;
+ dma_addr_t src;
+ dma_addr_t dst;
+ uint32_t num;
+ uint32_t blocks;
+ uint32_t len = 0;
+ uint32_t total_len = 0;
+ int i, j = 0;
+
+ num = min(dst_nents, src_nents);
+ blocks = num / (NUM_SG_PER_BLK - 1);
+ if (num % (NUM_SG_PER_BLK - 1))
+ blocks += 1;
+ if (dpaa2_comp->sg_blk_num < blocks) {
+ len = blocks - dpaa2_comp->sg_blk_num;
+ for (i = 0; i < len; i++) {
+ /* source sg blocks */
+ sg_blk = dpaa2_qdma_get_sg_blk(dpaa2_comp, dpaa2_chan);
+ if (!sg_blk)
+ return 0;
+ list_add_tail(&sg_blk->list, &dpaa2_comp->sg_src_head);
+ /* destination sg blocks */
+ sg_blk = dpaa2_qdma_get_sg_blk(dpaa2_comp, dpaa2_chan);
+ if (!sg_blk)
+ return 0;
+ list_add_tail(&sg_blk->list, &dpaa2_comp->sg_dst_head);
+ }
+ } else {
+ len = dpaa2_comp->sg_blk_num - blocks;
+ for (i = 0; i < len; i++) {
+ spin_lock(&dpaa2_chan->queue_lock);
+ /* handle source sg blocks */
+ sg_blk = list_first_entry(&dpaa2_comp->sg_src_head,
+ struct qdma_sg_blk, list);
+ list_del(&sg_blk->list);
+ list_add_tail(&sg_blk->list, &dpaa2_chan->sgb_free);
+ /* handle destination sg blocks */
+ sg_blk = list_first_entry(&dpaa2_comp->sg_dst_head,
+ struct qdma_sg_blk, list);
+ list_del(&sg_blk->list);
+ list_add_tail(&sg_blk->list, &dpaa2_chan->sgb_free);
+ spin_unlock(&dpaa2_chan->queue_lock);
+ }
+ }
+ dpaa2_comp->sg_blk_num = blocks;
+
+ /* get the first source sg phy address */
+ sg_blk = list_first_entry(&dpaa2_comp->sg_src_head,
+ struct qdma_sg_blk, list);
+ dpaa2_comp->sge_src_bus_addr = sg_blk->blk_bus_addr;
+ /* get the first destinaiton sg phy address */
+ sg_blk_dst = list_first_entry(&dpaa2_comp->sg_dst_head,
+ struct qdma_sg_blk, list);
+ dpaa2_comp->sge_dst_bus_addr = sg_blk_dst->blk_bus_addr;
+
+ for (i = 0; i < blocks; i++) {
+ src_sge = (struct dpaa2_qdma_sg *)sg_blk->blk_virt_addr;
+ dst_sge = (struct dpaa2_qdma_sg *)sg_blk_dst->blk_virt_addr;
+
+ for (j = 0; j < (NUM_SG_PER_BLK - 1); j++) {
+ len = min(sg_dma_len(dst_sg), sg_dma_len(src_sg));
+ if (0 == len)
+ goto fetch;
+ total_len += len;
+ src = sg_dma_address(src_sg);
+ dst = sg_dma_address(dst_sg);
+
+ /* source SG */
+ src_sge->addr_lo = src;
+ src_sge->addr_hi = (src >> 32);
+ src_sge->data_len.data_len_sl0 = len;
+ src_sge->ctrl.sl = QDMA_SG_SL_LONG;
+ src_sge->ctrl.fmt = QDMA_SG_FMT_SDB;
+ /* destination SG */
+ dst_sge->addr_lo = dst;
+ dst_sge->addr_hi = (dst >> 32);
+ dst_sge->data_len.data_len_sl0 = len;
+ dst_sge->ctrl.sl = QDMA_SG_SL_LONG;
+ dst_sge->ctrl.fmt = QDMA_SG_FMT_SDB;
+fetch:
+ num--;
+ if (0 == num) {
+ src_sge->ctrl.f = QDMA_SG_F;
+ dst_sge->ctrl.f = QDMA_SG_F;
+ goto end;
+ }
+ dst_sg = sg_next(dst_sg);
+ src_sg = sg_next(src_sg);
+ src_sge++;
+ dst_sge++;
+ if (j == (NUM_SG_PER_BLK - 2)) {
+ /* for next blocks, extension */
+ sg_blk = list_next_entry(sg_blk, list);
+ sg_blk_dst = list_next_entry(sg_blk_dst, list);
+ src_sge->addr_lo = sg_blk->blk_bus_addr;
+ src_sge->addr_hi = sg_blk->blk_bus_addr >> 32;
+ src_sge->ctrl.sl = QDMA_SG_SL_LONG;
+ src_sge->ctrl.fmt = QDMA_SG_FMT_SGTE;
+ dst_sge->addr_lo = sg_blk_dst->blk_bus_addr;
+ dst_sge->addr_hi =
+ sg_blk_dst->blk_bus_addr >> 32;
+ dst_sge->ctrl.sl = QDMA_SG_SL_LONG;
+ dst_sge->ctrl.fmt = QDMA_SG_FMT_SGTE;
+ }
+ }
+ }
+
+end:
+ return total_len;
+}
+
+static struct dma_async_tx_descriptor *dpaa2_qdma_prep_sg(
+ struct dma_chan *chan,
+ struct scatterlist *dst_sg, u32 dst_nents,
+ struct scatterlist *src_sg, u32 src_nents,
+ unsigned long flags)
+{
+ struct dpaa2_qdma_chan *dpaa2_chan = to_dpaa2_qdma_chan(chan);
+ struct dpaa2_qdma_comp *dpaa2_comp;
+ struct dpaa2_frame_list *f_list;
+ struct device *dev = dpaa2_chan->qdma->priv->dev;
+ uint32_t total_len = 0;
+
+ /* basic sanity checks */
+ if (dst_nents == 0 || src_nents == 0)
+ return NULL;
+
+ if (dst_sg == NULL || src_sg == NULL)
+ return NULL;
+
+ /* get the descriptors required */
+ dpaa2_comp = dpaa2_qdma_request_desc(dpaa2_chan);
+
+ /* populate Frame descriptor */
+ dpaa2_qdma_populate_fd(QDMA_FD_LONG_FORMAT, dpaa2_comp);
+
+ /* prepare Scatter gather entry for source and destination */
+ total_len = dpaa2_qdma_populate_sg(dev, dpaa2_chan,
+ dpaa2_comp, dst_sg, dst_nents, src_sg, src_nents);
+
+ f_list = (struct dpaa2_frame_list *)dpaa2_comp->fl_virt_addr;
+ /* first frame list for descriptor buffer */
+ dpaa2_qdma_populate_first_framel(f_list, dpaa2_comp);
+ f_list++;
+ /* prepare Scatter gather entry for source and destination */
+ /* populate source and destination frame list table */
+ dpaa2_qdma_populate_frames(f_list, dpaa2_comp->sge_dst_bus_addr,
+ dpaa2_comp->sge_src_bus_addr,
+ total_len, QDMA_FL_FMT_SGE);
+
+ return vchan_tx_prep(&dpaa2_chan->vchan, &dpaa2_comp->vdesc, flags);
+}
+
+static enum dma_status dpaa2_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 dpaa2_qdma_free_desc(struct virt_dma_desc *vdesc)
+{
+}
+
+static void dpaa2_qdma_issue_pending(struct dma_chan *chan)
+{
+ struct dpaa2_qdma_comp *dpaa2_comp;
+ struct dpaa2_qdma_chan *dpaa2_chan = to_dpaa2_qdma_chan(chan);
+ struct dpaa2_qdma_engine *dpaa2_qdma = dpaa2_chan->qdma;
+ struct dpaa2_qdma_priv *priv = dpaa2_qdma->priv;
+ struct virt_dma_desc *vdesc;
+ struct dpaa2_fd *fd;
+ int err;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dpaa2_chan->queue_lock, flags);
+ spin_lock(&dpaa2_chan->vchan.lock);
+ if (vchan_issue_pending(&dpaa2_chan->vchan)) {
+ vdesc = vchan_next_desc(&dpaa2_chan->vchan);
+ if (!vdesc)
+ goto err_enqueue;
+ dpaa2_comp = to_fsl_qdma_comp(vdesc);
+
+ fd = (struct dpaa2_fd *)dpaa2_comp->fd_virt_addr;
+
+ list_del(&vdesc->node);
+ list_add_tail(&dpaa2_comp->list, &dpaa2_chan->comp_used);
+
+ /* TOBO: priority hard-coded to zero */
+ err = dpaa2_io_service_enqueue_fq(NULL,
+ priv->tx_queue_attr[0].fqid, fd);
+ if (err) {
+ list_del(&dpaa2_comp->list);
+ list_add_tail(&dpaa2_comp->list,
+ &dpaa2_chan->comp_free);
+ }
+
+ }
+err_enqueue:
+ spin_unlock(&dpaa2_chan->vchan.lock);
+ spin_unlock_irqrestore(&dpaa2_chan->queue_lock, flags);
+}
+
+static int __cold dpaa2_qdma_setup(struct fsl_mc_device *ls_dev)
+{
+ struct device *dev = &ls_dev->dev;
+ struct dpaa2_qdma_priv *priv;
+ struct dpaa2_qdma_priv_per_prio *ppriv;
+ uint8_t prio_def = DPDMAI_PRIO_NUM;
+ int err;
+ int i;
+
+ priv = dev_get_drvdata(dev);
+
+ priv->dev = dev;
+ priv->dpqdma_id = ls_dev->obj_desc.id;
+
+ /*Get the handle for the DPDMAI this interface is associate with */
+ err = dpdmai_open(priv->mc_io, 0, priv->dpqdma_id, &ls_dev->mc_handle);
+ if (err) {
+ dev_err(dev, "dpdmai_open() failed\n");
+ return err;
+ }
+ dev_info(dev, "Opened dpdmai object successfully\n");
+
+ err = dpdmai_get_attributes(priv->mc_io, 0, ls_dev->mc_handle,
+ &priv->dpdmai_attr);
+ if (err) {
+ dev_err(dev, "dpdmai_get_attributes() failed\n");
+ return err;
+ }
+
+ if (priv->dpdmai_attr.version.major > DPDMAI_VER_MAJOR) {
+ dev_err(dev, "DPDMAI major version mismatch\n"
+ "Found %u.%u, supported version is %u.%u\n",
+ priv->dpdmai_attr.version.major,
+ priv->dpdmai_attr.version.minor,
+ DPDMAI_VER_MAJOR, DPDMAI_VER_MINOR);
+ }
+
+ if (priv->dpdmai_attr.version.minor > DPDMAI_VER_MINOR) {
+ dev_err(dev, "DPDMAI minor version mismatch\n"
+ "Found %u.%u, supported version is %u.%u\n",
+ priv->dpdmai_attr.version.major,
+ priv->dpdmai_attr.version.minor,
+ DPDMAI_VER_MAJOR, DPDMAI_VER_MINOR);
+ }
+
+ priv->num_pairs = min(priv->dpdmai_attr.num_of_priorities, prio_def);
+ ppriv = kcalloc(priv->num_pairs, sizeof(*ppriv), GFP_KERNEL);
+ if (!ppriv) {
+ dev_err(dev, "kzalloc for ppriv failed\n");
+ return -1;
+ }
+ priv->ppriv = ppriv;
+
+ for (i = 0; i < priv->num_pairs; i++) {
+ err = dpdmai_get_rx_queue(priv->mc_io, 0, ls_dev->mc_handle,
+ i, &priv->rx_queue_attr[i]);
+ if (err) {
+ dev_err(dev, "dpdmai_get_rx_queue() failed\n");
+ return err;
+ }
+ ppriv->rsp_fqid = priv->rx_queue_attr[i].fqid;
+
+ err = dpdmai_get_tx_queue(priv->mc_io, 0, ls_dev->mc_handle,
+ i, &priv->tx_queue_attr[i]);
+ if (err) {
+ dev_err(dev, "dpdmai_get_tx_queue() failed\n");
+ return err;
+ }
+ ppriv->req_fqid = priv->tx_queue_attr[i].fqid;
+ ppriv->prio = i;
+ ppriv->priv = priv;
+ ppriv++;
+ }
+
+ return 0;
+}
+
+static void dpaa2_qdma_fqdan_cb(struct dpaa2_io_notification_ctx *ctx)
+{
+ struct dpaa2_qdma_priv_per_prio *ppriv = container_of(ctx,
+ struct dpaa2_qdma_priv_per_prio, nctx);
+ struct dpaa2_qdma_priv *priv = ppriv->priv;
+ struct dpaa2_qdma_comp *dpaa2_comp, *_comp_tmp;
+ struct dpaa2_qdma_chan *qchan;
+ const struct dpaa2_fd *fd;
+ const struct dpaa2_fd *fd_eq;
+ struct dpaa2_dq *dq;
+ int err;
+ int is_last = 0;
+ uint8_t status;
+ int i;
+ int found;
+ uint32_t n_chans = priv->dpaa2_qdma->n_chans;
+
+ do {
+ err = dpaa2_io_service_pull_fq(NULL, ppriv->rsp_fqid,
+ ppriv->store);
+ } while (err);
+
+ while (!is_last) {
+ do {
+ dq = dpaa2_io_store_next(ppriv->store, &is_last);
+ } while (!is_last && !dq);
+ if (!dq) {
+ dev_err(priv->dev, "FQID returned no valid frames!\n");
+ continue;
+ }
+
+ /* obtain FD and process the error */
+ fd = dpaa2_dq_fd(dq);
+ status = fd->simple.ctrl & 0xff;
+ if (status)
+ dev_err(priv->dev, "FD error occurred\n");
+ found = 0;
+ for (i = 0; i < n_chans; i++) {
+ qchan = &priv->dpaa2_qdma->chans[i];
+ spin_lock(&qchan->queue_lock);
+ if (list_empty(&qchan->comp_used)) {
+ spin_unlock(&qchan->queue_lock);
+ continue;
+ }
+ list_for_each_entry_safe(dpaa2_comp, _comp_tmp,
+ &qchan->comp_used, list) {
+ fd_eq = (struct dpaa2_fd *)
+ dpaa2_comp->fd_virt_addr;
+
+ if (fd_eq->simple.addr ==
+ fd->simple.addr) {
+
+ list_del(&dpaa2_comp->list);
+ list_add_tail(&dpaa2_comp->list,
+ &qchan->comp_free);
+
+ spin_lock(&qchan->vchan.lock);
+ vchan_cookie_complete(
+ &dpaa2_comp->vdesc);
+ spin_unlock(&qchan->vchan.lock);
+ found = 1;
+ break;
+ }
+ }
+ spin_unlock(&qchan->queue_lock);
+ if (found)
+ break;
+ }
+ }
+
+ dpaa2_io_service_rearm(NULL, ctx);
+}
+
+static int __cold dpaa2_qdma_dpio_setup(struct dpaa2_qdma_priv *priv)
+{
+ int err, i, num;
+ struct device *dev = priv->dev;
+ struct dpaa2_qdma_priv_per_prio *ppriv;
+
+ num = priv->num_pairs;
+ ppriv = priv->ppriv;
+ for (i = 0; i < num; i++) {
+ ppriv->nctx.is_cdan = 0;
+ ppriv->nctx.desired_cpu = 1;
+ ppriv->nctx.id = ppriv->rsp_fqid;
+ ppriv->nctx.cb = dpaa2_qdma_fqdan_cb;
+ err = dpaa2_io_service_register(NULL, &ppriv->nctx);
+ if (err) {
+ dev_err(dev, "Notification register failed\n");
+ goto err_service;
+ }
+
+ ppriv->store = dpaa2_io_store_create(DPAA2_QDMA_STORE_SIZE,
+ dev);
+ if (!ppriv->store) {
+ dev_err(dev, "dpaa2_io_store_create() failed\n");
+ goto err_store;
+ }
+
+ ppriv++;
+ }
+ return 0;
+
+err_store:
+ dpaa2_io_service_deregister(NULL, &ppriv->nctx);
+err_service:
+ ppriv--;
+ while (ppriv >= priv->ppriv) {
+ dpaa2_io_service_deregister(NULL, &ppriv->nctx);
+ dpaa2_io_store_destroy(ppriv->store);
+ ppriv--;
+ }
+ return -1;
+}
+
+static void __cold dpaa2_dpmai_store_free(struct dpaa2_qdma_priv *priv)
+{
+ struct dpaa2_qdma_priv_per_prio *ppriv = priv->ppriv;
+ int i;
+
+ for (i = 0; i < priv->num_pairs; i++) {
+ dpaa2_io_store_destroy(ppriv->store);
+ ppriv++;
+ }
+}
+
+static void __cold dpaa2_dpdmai_dpio_free(struct dpaa2_qdma_priv *priv)
+{
+ struct dpaa2_qdma_priv_per_prio *ppriv = priv->ppriv;
+ int i;
+
+ for (i = 0; i < priv->num_pairs; i++) {
+ dpaa2_io_service_deregister(NULL, &ppriv->nctx);
+ ppriv++;
+ }
+}
+
+static int __cold dpaa2_dpdmai_bind(struct dpaa2_qdma_priv *priv)
+{
+ int err;
+ struct dpdmai_rx_queue_cfg rx_queue_cfg;
+ struct device *dev = priv->dev;
+ struct dpaa2_qdma_priv_per_prio *ppriv;
+ struct fsl_mc_device *ls_dev = to_fsl_mc_device(dev);
+ int i, num;
+
+ num = priv->num_pairs;
+ ppriv = priv->ppriv;
+ for (i = 0; i < num; i++) {
+ rx_queue_cfg.options = DPDMAI_QUEUE_OPT_USER_CTX |
+ DPDMAI_QUEUE_OPT_DEST;
+ rx_queue_cfg.user_ctx = ppriv->nctx.qman64;
+ rx_queue_cfg.dest_cfg.dest_type = DPDMAI_DEST_DPIO;
+ rx_queue_cfg.dest_cfg.dest_id = ppriv->nctx.dpio_id;
+ rx_queue_cfg.dest_cfg.priority = ppriv->prio;
+ err = dpdmai_set_rx_queue(priv->mc_io, 0, ls_dev->mc_handle,
+ rx_queue_cfg.dest_cfg.priority, &rx_queue_cfg);
+ if (err) {
+ dev_err(dev, "dpdmai_set_rx_queue() failed\n");
+ return err;
+ }
+
+ ppriv++;
+ }
+
+ return 0;
+}
+
+static int __cold dpaa2_dpdmai_dpio_unbind(struct dpaa2_qdma_priv *priv)
+{
+ int err = 0;
+ struct device *dev = priv->dev;
+ struct fsl_mc_device *ls_dev = to_fsl_mc_device(dev);
+ struct dpaa2_qdma_priv_per_prio *ppriv = priv->ppriv;
+ int i;
+
+ for (i = 0; i < priv->num_pairs; i++) {
+ ppriv->nctx.qman64 = 0;
+ ppriv->nctx.dpio_id = 0;
+ ppriv++;
+ }
+
+ err = dpdmai_reset(priv->mc_io, 0, ls_dev->mc_handle);
+ if (err)
+ dev_err(dev, "dpdmai_reset() failed\n");
+
+ return err;
+}
+
+static void __cold dpaa2_dpdmai_free_pool(struct dpaa2_qdma_chan *qchan,
+ struct list_head *head)
+{
+ struct qdma_sg_blk *sgb_tmp, *_sgb_tmp;
+ /* free the QDMA SG pool block */
+ list_for_each_entry_safe(sgb_tmp, _sgb_tmp, head, list) {
+ sgb_tmp->blk_virt_addr = (void *)((struct qdma_sg_blk *)
+ sgb_tmp->blk_virt_addr - 1);
+ sgb_tmp->blk_bus_addr = sgb_tmp->blk_bus_addr
+ - sizeof(*sgb_tmp);
+ dma_pool_free(qchan->sg_blk_pool, sgb_tmp->blk_virt_addr,
+ sgb_tmp->blk_bus_addr);
+ }
+
+}
+
+static void __cold dpaa2_dpdmai_free_comp(struct dpaa2_qdma_chan *qchan,
+ struct list_head *head)
+{
+ struct dpaa2_qdma_comp *comp_tmp, *_comp_tmp;
+ /* free the QDMA comp resource */
+ list_for_each_entry_safe(comp_tmp, _comp_tmp,
+ head, list) {
+ dma_pool_free(qchan->fd_pool,
+ comp_tmp->fd_virt_addr,
+ comp_tmp->fd_bus_addr);
+ /* free the SG source block on comp */
+ dpaa2_dpdmai_free_pool(qchan, &comp_tmp->sg_src_head);
+ /* free the SG destination block on comp */
+ dpaa2_dpdmai_free_pool(qchan, &comp_tmp->sg_dst_head);
+ list_del(&comp_tmp->list);
+ kfree(comp_tmp);
+ }
+
+}
+
+static void __cold dpaa2_dpdmai_free_channels(
+ struct dpaa2_qdma_engine *dpaa2_qdma)
+{
+ struct dpaa2_qdma_chan *qchan;
+ int num, i;
+
+ num = dpaa2_qdma->n_chans;
+ for (i = 0; i < num; i++) {
+ qchan = &dpaa2_qdma->chans[i];
+ dpaa2_dpdmai_free_comp(qchan, &qchan->comp_used);
+ dpaa2_dpdmai_free_comp(qchan, &qchan->comp_free);
+ dpaa2_dpdmai_free_pool(qchan, &qchan->sgb_free);
+ dma_pool_destroy(qchan->fd_pool);
+ dma_pool_destroy(qchan->sg_blk_pool);
+ }
+}
+
+static int dpaa2_dpdmai_alloc_channels(struct dpaa2_qdma_engine *dpaa2_qdma)
+{
+ struct dpaa2_qdma_chan *dpaa2_chan;
+ struct device *dev = &dpaa2_qdma->priv->dpdmai_dev->dev;
+ int i;
+
+ INIT_LIST_HEAD(&dpaa2_qdma->dma_dev.channels);
+ for (i = 0; i < dpaa2_qdma->n_chans; i++) {
+ dpaa2_chan = &dpaa2_qdma->chans[i];
+ dpaa2_chan->qdma = dpaa2_qdma;
+ dpaa2_chan->vchan.desc_free = dpaa2_qdma_free_desc;
+ vchan_init(&dpaa2_chan->vchan, &dpaa2_qdma->dma_dev);
+
+ dpaa2_chan->fd_pool = dma_pool_create("fd_pool",
+ dev, FD_POOL_SIZE, 32, 0);
+ if (!dpaa2_chan->fd_pool)
+ return -1;
+ dpaa2_chan->sg_blk_pool = dma_pool_create("sg_blk_pool",
+ dev, SG_POOL_SIZE, 32, 0);
+ if (!dpaa2_chan->sg_blk_pool)
+ return -1;
+
+ spin_lock_init(&dpaa2_chan->queue_lock);
+ INIT_LIST_HEAD(&dpaa2_chan->comp_used);
+ INIT_LIST_HEAD(&dpaa2_chan->comp_free);
+ INIT_LIST_HEAD(&dpaa2_chan->sgb_free);
+ }
+ return 0;
+}
+
+static int dpaa2_qdma_probe(struct fsl_mc_device *dpdmai_dev)
+{
+ struct dpaa2_qdma_priv *priv;
+ struct device *dev = &dpdmai_dev->dev;
+ struct dpaa2_qdma_engine *dpaa2_qdma;
+ int err;
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+ dev_set_drvdata(dev, priv);
+ priv->dpdmai_dev = dpdmai_dev;
+
+ priv->iommu_domain = iommu_get_domain_for_dev(dev);
+ if (priv->iommu_domain)
+ smmu_disable = false;
+
+ /* obtain a MC portal */
+ err = fsl_mc_portal_allocate(dpdmai_dev, 0, &priv->mc_io);
+ if (err) {
+ dev_err(dev, "MC portal allocation failed\n");
+ goto err_mcportal;
+ }
+
+ /* DPDMAI initialization */
+ err = dpaa2_qdma_setup(dpdmai_dev);
+ if (err) {
+ dev_err(dev, "dpaa2_dpdmai_setup() failed\n");
+ goto err_dpdmai_setup;
+ }
+
+ /* DPIO */
+ err = dpaa2_qdma_dpio_setup(priv);
+ if (err) {
+ dev_err(dev, "dpaa2_dpdmai_dpio_setup() failed\n");
+ goto err_dpio_setup;
+ }
+
+ /* DPDMAI binding to DPIO */
+ err = dpaa2_dpdmai_bind(priv);
+ if (err) {
+ dev_err(dev, "dpaa2_dpdmai_bind() failed\n");
+ goto err_bind;
+ }
+
+ /* DPDMAI enable */
+ err = dpdmai_enable(priv->mc_io, 0, dpdmai_dev->mc_handle);
+ if (err) {
+ dev_err(dev, "dpdmai_enable() faile\n");
+ goto err_enable;
+ }
+
+ dpaa2_qdma = kzalloc(sizeof(*dpaa2_qdma), GFP_KERNEL);
+ if (!dpaa2_qdma) {
+ err = -ENOMEM;
+ goto err_eng;
+ }
+
+ priv->dpaa2_qdma = dpaa2_qdma;
+ dpaa2_qdma->priv = priv;
+
+ dpaa2_qdma->n_chans = NUM_CH;
+
+ err = dpaa2_dpdmai_alloc_channels(dpaa2_qdma);
+ if (err) {
+ dev_err(dev, "QDMA alloc channels faile\n");
+ goto err_reg;
+ }
+
+ dma_cap_set(DMA_PRIVATE, dpaa2_qdma->dma_dev.cap_mask);
+ dma_cap_set(DMA_SLAVE, dpaa2_qdma->dma_dev.cap_mask);
+ dma_cap_set(DMA_MEMCPY, dpaa2_qdma->dma_dev.cap_mask);
+ dma_cap_set(DMA_SG, dpaa2_qdma->dma_dev.cap_mask);
+
+ dpaa2_qdma->dma_dev.dev = dev;
+ dpaa2_qdma->dma_dev.device_alloc_chan_resources
+ = dpaa2_qdma_alloc_chan_resources;
+ dpaa2_qdma->dma_dev.device_free_chan_resources
+ = dpaa2_qdma_free_chan_resources;
+ dpaa2_qdma->dma_dev.device_tx_status = dpaa2_qdma_tx_status;
+ dpaa2_qdma->dma_dev.device_prep_dma_memcpy = dpaa2_qdma_prep_memcpy;
+ dpaa2_qdma->dma_dev.device_prep_dma_sg = dpaa2_qdma_prep_sg;
+ dpaa2_qdma->dma_dev.device_issue_pending = dpaa2_qdma_issue_pending;
+
+ err = dma_async_device_register(&dpaa2_qdma->dma_dev);
+ if (err) {
+ dev_err(dev, "Can't register NXP QDMA engine.\n");
+ goto err_reg;
+ }
+
+ return 0;
+
+err_reg:
+ dpaa2_dpdmai_free_channels(dpaa2_qdma);
+ kfree(dpaa2_qdma);
+err_eng:
+ dpdmai_disable(priv->mc_io, 0, dpdmai_dev->mc_handle);
+err_enable:
+ dpaa2_dpdmai_dpio_unbind(priv);
+err_bind:
+ dpaa2_dpmai_store_free(priv);
+ dpaa2_dpdmai_dpio_free(priv);
+err_dpio_setup:
+ dpdmai_close(priv->mc_io, 0, dpdmai_dev->mc_handle);
+err_dpdmai_setup:
+ fsl_mc_portal_free(priv->mc_io);
+err_mcportal:
+ kfree(priv->ppriv);
+ kfree(priv);
+ dev_set_drvdata(dev, NULL);
+ return err;
+}
+
+static int dpaa2_qdma_remove(struct fsl_mc_device *ls_dev)
+{
+ struct device *dev;
+ struct dpaa2_qdma_priv *priv;
+ struct dpaa2_qdma_engine *dpaa2_qdma;
+
+ dev = &ls_dev->dev;
+ priv = dev_get_drvdata(dev);
+ dpaa2_qdma = priv->dpaa2_qdma;
+
+ dpdmai_disable(priv->mc_io, 0, ls_dev->mc_handle);
+ dpaa2_dpdmai_dpio_unbind(priv);
+ dpaa2_dpmai_store_free(priv);
+ dpaa2_dpdmai_dpio_free(priv);
+ dpdmai_close(priv->mc_io, 0, ls_dev->mc_handle);
+ fsl_mc_portal_free(priv->mc_io);
+ dev_set_drvdata(dev, NULL);
+ dpaa2_dpdmai_free_channels(dpaa2_qdma);
+
+ dma_async_device_unregister(&dpaa2_qdma->dma_dev);
+ kfree(priv);
+ kfree(dpaa2_qdma);
+
+ return 0;
+}
+
+static const struct fsl_mc_device_id dpaa2_qdma_id_table[] = {
+ {
+ .vendor = FSL_MC_VENDOR_FREESCALE,
+ .obj_type = "dpdmai",
+ },
+ { .vendor = 0x0 }
+};
+
+static struct fsl_mc_driver dpaa2_qdma_driver = {
+ .driver = {
+ .name = "dpaa2-qdma",
+ .owner = THIS_MODULE,
+ },
+ .probe = dpaa2_qdma_probe,
+ .remove = dpaa2_qdma_remove,
+ .match_id_table = dpaa2_qdma_id_table
+};
+
+static int __init dpaa2_qdma_driver_init(void)
+{
+ return fsl_mc_driver_register(&(dpaa2_qdma_driver));
+}
+late_initcall(dpaa2_qdma_driver_init);
+
+static void __exit fsl_qdma_exit(void)
+{
+ fsl_mc_driver_unregister(&(dpaa2_qdma_driver));
+}
+module_exit(fsl_qdma_exit);
+
+MODULE_DESCRIPTION("NXP DPAA2 qDMA driver");
+MODULE_LICENSE("Dual BSD/GPL");
--- /dev/null
+++ b/drivers/dma/dpaa2-qdma/dpaa2-qdma.h
@@ -0,0 +1,262 @@
+/* Copyright 2015 NXP Semiconductor Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of NXP Semiconductor nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY NXP Semiconductor ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL NXP Semiconductor BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __DPAA2_QDMA_H
+#define __DPAA2_QDMA_H
+
+#define LONG_FORMAT 1
+
+#define DPAA2_QDMA_STORE_SIZE 16
+#define NUM_CH 8
+#define NUM_SG_PER_BLK 16
+
+#define QDMA_DMR_OFFSET 0x0
+#define QDMA_DQ_EN (0 << 30)
+#define QDMA_DQ_DIS (1 << 30)
+
+#define QDMA_DSR_M_OFFSET 0x10004
+
+struct dpaa2_qdma_sd_d {
+ uint32_t rsv:32;
+ union {
+ struct {
+ uint32_t ssd:12; /* souce stride distance */
+ uint32_t sss:12; /* souce stride size */
+ uint32_t rsv1:8;
+ } sdf;
+ struct {
+ uint32_t dsd:12; /* Destination stride distance */
+ uint32_t dss:12; /* Destination stride size */
+ uint32_t rsv2:8;
+ } ddf;
+ } df;
+ uint32_t rbpcmd; /* Route-by-port command */
+ uint32_t cmd;
+} __attribute__((__packed__));
+/* Source descriptor command read transaction type for RBP=0:
+ coherent copy of cacheable memory */
+#define QDMA_SD_CMD_RDTTYPE_COHERENT (0xb << 28)
+/* Destination descriptor command write transaction type for RBP=0:
+ coherent copy of cacheable memory */
+#define QDMA_DD_CMD_WRTTYPE_COHERENT (0x6 << 28)
+
+#define QDMA_SG_FMT_SDB 0x0 /* single data buffer */
+#define QDMA_SG_FMT_FDS 0x1 /* frame data section */
+#define QDMA_SG_FMT_SGTE 0x2 /* SGT extension */
+#define QDMA_SG_SL_SHORT 0x1 /* short length */
+#define QDMA_SG_SL_LONG 0x0 /* short length */
+#define QDMA_SG_F 0x1 /* last sg entry */
+struct dpaa2_qdma_sg {
+ uint32_t addr_lo; /* address 0:31 */
+ uint32_t addr_hi:17; /* address 32:48 */
+ uint32_t rsv:15;
+ union {
+ uint32_t data_len_sl0; /* SL=0, the long format */
+ struct {
+ uint32_t len:17; /* SL=1, the short format */
+ uint32_t reserve:3;
+ uint32_t sf:1;
+ uint32_t sr:1;
+ uint32_t size:10; /* buff size */
+ } data_len_sl1;
+ } data_len; /* AVAIL_LENGTH */
+ struct {
+ uint32_t bpid:14;
+ uint32_t ivp:1;
+ uint32_t mbt:1;
+ uint32_t offset:12;
+ uint32_t fmt:2;
+ uint32_t sl:1;
+ uint32_t f:1;
+ } ctrl;
+} __attribute__((__packed__));
+
+#define QMAN_FD_FMT_ENABLE (1 << 12) /* frame list table enable */
+#define QMAN_FD_BMT_ENABLE (1 << 15) /* bypass memory translation */
+#define QMAN_FD_BMT_DISABLE (0 << 15) /* bypass memory translation */
+#define QMAN_FD_SL_DISABLE (0 << 14) /* short lengthe disabled */
+#define QMAN_FD_SL_ENABLE (1 << 14) /* short lengthe enabled */
+
+#define QDMA_SB_FRAME (0 << 28) /* single frame */
+#define QDMA_SG_FRAME (2 << 28) /* scatter gather frames */
+#define QDMA_FINAL_BIT_DISABLE (0 << 31) /* final bit disable */
+#define QDMA_FINAL_BIT_ENABLE (1 << 31) /* final bit enable */
+
+#define QDMA_FD_SHORT_FORMAT (1 << 11) /* short format */
+#define QDMA_FD_LONG_FORMAT (0 << 11) /* long format */
+#define QDMA_SER_DISABLE (0 << 8) /* no notification */
+#define QDMA_SER_CTX (1 << 8) /* notification by FQD_CTX[fqid] */
+#define QDMA_SER_DEST (2 << 8) /* notification by destination desc */
+#define QDMA_SER_BOTH (3 << 8) /* soruce and dest notification */
+#define QDMA_FD_SPF_ENALBE (1 << 30) /* source prefetch enable */
+
+#define QMAN_FD_VA_ENABLE (1 << 14) /* Address used is virtual address */
+#define QMAN_FD_VA_DISABLE (0 << 14)/* Address used is a real address */
+#define QMAN_FD_CBMT_ENABLE (1 << 15) /* Flow Context: 49bit physical address */
+#define QMAN_FD_CBMT_DISABLE (0 << 15) /* Flow Context: 64bit virtual address */
+#define QMAN_FD_SC_DISABLE (0 << 27) /* stashing control */
+
+#define QDMA_FL_FMT_SBF 0x0 /* Single buffer frame */
+#define QDMA_FL_FMT_SGE 0x2 /* Scatter gather frame */
+#define QDMA_FL_BMT_ENABLE 0x1 /* enable bypass memory translation */
+#define QDMA_FL_BMT_DISABLE 0x0 /* enable bypass memory translation */
+#define QDMA_FL_SL_LONG 0x0 /* long length */
+#define QDMA_FL_SL_SHORT 0x1 /* short length */
+#define QDMA_FL_F 0x1 /* last frame list bit */
+/*Description of Frame list table structure*/
+struct dpaa2_frame_list {
+ uint32_t addr_lo; /* lower 32 bits of address */
+ uint32_t addr_hi:17; /* upper 17 bits of address */
+ uint32_t resrvd:15;
+ union {
+ uint32_t data_len_sl0; /* If SL=0, then data length is 32 */
+ struct {
+ uint32_t data_len:18; /* IF SL=1; length is 18bit */
+ uint32_t resrvd:2;
+ uint32_t mem:12; /* Valid only when SL=1 */
+ } data_len_sl1;
+ } data_len;
+ /* word 4 */
+ uint32_t bpid:14; /* Frame buffer pool ID */
+ uint32_t ivp:1; /* Invalid Pool ID. */
+ uint32_t bmt:1; /* Bypass Memory Translation */
+ uint32_t offset:12; /* Frame offset */
+ uint32_t fmt:2; /* Frame Format */
+ uint32_t sl:1; /* Short Length */
+ uint32_t f:1; /* Final bit */
+
+ uint32_t frc; /* Frame Context */
+ /* word 6 */
+ uint32_t err:8; /* Frame errors */
+ uint32_t resrvd0:8;
+ uint32_t asal:4; /* accelerator-specific annotation length */
+ uint32_t resrvd1:1;
+ uint32_t ptv2:1;
+ uint32_t ptv1:1;
+ uint32_t pta:1; /* pass-through annotation */
+ uint32_t resrvd2:8;
+
+ uint32_t flc_lo; /* lower 32 bits fo flow context */
+ uint32_t flc_hi; /* higher 32 bits fo flow context */
+} __attribute__((__packed__));
+
+struct dpaa2_qdma_chan {
+ struct virt_dma_chan vchan;
+ struct virt_dma_desc vdesc;
+ enum dma_status status;
+ struct dpaa2_qdma_engine *qdma;
+
+ struct mutex dpaa2_queue_mutex;
+ spinlock_t queue_lock;
+ struct dma_pool *fd_pool;
+ struct dma_pool *sg_blk_pool;
+
+ struct list_head comp_used;
+ struct list_head comp_free;
+
+ struct list_head sgb_free;
+};
+
+struct qdma_sg_blk {
+ dma_addr_t blk_bus_addr;
+ void *blk_virt_addr;
+ struct list_head list;
+};
+
+struct dpaa2_qdma_comp {
+ dma_addr_t fd_bus_addr;
+ dma_addr_t fl_bus_addr;
+ dma_addr_t desc_bus_addr;
+ dma_addr_t sge_src_bus_addr;
+ dma_addr_t sge_dst_bus_addr;
+ void *fd_virt_addr;
+ void *fl_virt_addr;
+ void *desc_virt_addr;
+ void *sg_src_virt_addr;
+ void *sg_dst_virt_addr;
+ struct qdma_sg_blk *sg_blk;
+ uint32_t sg_blk_num;
+ struct list_head sg_src_head;
+ struct list_head sg_dst_head;
+ struct dpaa2_qdma_chan *qchan;
+ struct virt_dma_desc vdesc;
+ struct list_head list;
+};
+
+struct dpaa2_qdma_engine {
+ struct dma_device dma_dev;
+ u32 n_chans;
+ struct dpaa2_qdma_chan chans[NUM_CH];
+
+ struct dpaa2_qdma_priv *priv;
+};
+
+/*
+ * dpaa2_qdma_priv - driver private data
+ */
+struct dpaa2_qdma_priv {
+ int dpqdma_id;
+
+ struct iommu_domain *iommu_domain;
+ struct dpdmai_attr dpdmai_attr;
+ struct device *dev;
+ struct fsl_mc_io *mc_io;
+ struct fsl_mc_device *dpdmai_dev;
+
+ struct dpdmai_rx_queue_attr rx_queue_attr[DPDMAI_PRIO_NUM];
+ struct dpdmai_tx_queue_attr tx_queue_attr[DPDMAI_PRIO_NUM];
+
+ uint8_t num_pairs;
+
+ struct dpaa2_qdma_engine *dpaa2_qdma;
+ struct dpaa2_qdma_priv_per_prio *ppriv;
+};
+
+struct dpaa2_qdma_priv_per_prio {
+ int req_fqid;
+ int rsp_fqid;
+ int prio;
+
+ struct dpaa2_io_store *store;
+ struct dpaa2_io_notification_ctx nctx;
+
+ struct dpaa2_qdma_priv *priv;
+};
+
+/* FD pool size: one FD + 3 Frame list + 2 source/destination descriptor */
+#define FD_POOL_SIZE (sizeof(struct dpaa2_fd) + \
+ sizeof(struct dpaa2_frame_list) * 3 + \
+ sizeof(struct dpaa2_qdma_sd_d) * 2)
+
+/* qdma_sg_blk + 16 SGs */
+#define SG_POOL_SIZE (sizeof(struct qdma_sg_blk) +\
+ sizeof(struct dpaa2_qdma_sg) * NUM_SG_PER_BLK)
+#endif /* __DPAA2_QDMA_H */
--- /dev/null
+++ b/drivers/dma/dpaa2-qdma/dpdmai.c
@@ -0,0 +1,454 @@
+/* Copyright 2013-2015 Freescale Semiconductor Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of the above-listed copyright holders nor the
+ * names of any contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <linux/types.h>
+#include <linux/io.h>
+#include "fsl_dpdmai.h"
+#include "fsl_dpdmai_cmd.h"
+#include "../../../drivers/staging/fsl-mc/include/mc-sys.h"
+#include "../../../drivers/staging/fsl-mc/include/mc-cmd.h"
+
+int dpdmai_open(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ int dpdmai_id,
+ uint16_t *token)
+{
+ struct mc_command cmd = { 0 };
+ int err;
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_OPEN,
+ cmd_flags,
+ 0);
+ DPDMAI_CMD_OPEN(cmd, dpdmai_id);
+
+ /* send command to mc*/
+ err = mc_send_command(mc_io, &cmd);
+ if (err)
+ return err;
+
+ /* retrieve response parameters */
+ *token = MC_CMD_HDR_READ_TOKEN(cmd.header);
+
+ return 0;
+}
+
+int dpdmai_close(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token)
+{
+ struct mc_command cmd = { 0 };
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_CLOSE,
+ cmd_flags, token);
+
+ /* send command to mc*/
+ return mc_send_command(mc_io, &cmd);
+}
+
+int dpdmai_create(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ const struct dpdmai_cfg *cfg,
+ uint16_t *token)
+{
+ struct mc_command cmd = { 0 };
+ int err;
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_CREATE,
+ cmd_flags,
+ 0);
+ DPDMAI_CMD_CREATE(cmd, cfg);
+
+ /* send command to mc*/
+ err = mc_send_command(mc_io, &cmd);
+ if (err)
+ return err;
+
+ /* retrieve response parameters */
+ *token = MC_CMD_HDR_READ_TOKEN(cmd.header);
+
+ return 0;
+}
+
+int dpdmai_destroy(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token)
+{
+ struct mc_command cmd = { 0 };
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_DESTROY,
+ cmd_flags,
+ token);
+
+ /* send command to mc*/
+ return mc_send_command(mc_io, &cmd);
+}
+
+int dpdmai_enable(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token)
+{
+ struct mc_command cmd = { 0 };
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_ENABLE,
+ cmd_flags,
+ token);
+
+ /* send command to mc*/
+ return mc_send_command(mc_io, &cmd);
+}
+
+int dpdmai_disable(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token)
+{
+ struct mc_command cmd = { 0 };
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_DISABLE,
+ cmd_flags,
+ token);
+
+ /* send command to mc*/
+ return mc_send_command(mc_io, &cmd);
+}
+
+int dpdmai_is_enabled(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ int *en)
+{
+ struct mc_command cmd = { 0 };
+ int err;
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_IS_ENABLED,
+ cmd_flags,
+ token);
+
+ /* send command to mc*/
+ err = mc_send_command(mc_io, &cmd);
+ if (err)
+ return err;
+
+ /* retrieve response parameters */
+ DPDMAI_RSP_IS_ENABLED(cmd, *en);
+
+ return 0;
+}
+
+int dpdmai_reset(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token)
+{
+ struct mc_command cmd = { 0 };
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_RESET,
+ cmd_flags,
+ token);
+
+ /* send command to mc*/
+ return mc_send_command(mc_io, &cmd);
+}
+
+int dpdmai_get_irq(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ uint8_t irq_index,
+ int *type,
+ struct dpdmai_irq_cfg *irq_cfg)
+{
+ struct mc_command cmd = { 0 };
+ int err;
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_GET_IRQ,
+ cmd_flags,
+ token);
+ DPDMAI_CMD_GET_IRQ(cmd, irq_index);
+
+ /* send command to mc*/
+ err = mc_send_command(mc_io, &cmd);
+ if (err)
+ return err;
+
+ /* retrieve response parameters */
+ DPDMAI_RSP_GET_IRQ(cmd, *type, irq_cfg);
+
+ return 0;
+}
+
+int dpdmai_set_irq(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ uint8_t irq_index,
+ struct dpdmai_irq_cfg *irq_cfg)
+{
+ struct mc_command cmd = { 0 };
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_SET_IRQ,
+ cmd_flags,
+ token);
+ DPDMAI_CMD_SET_IRQ(cmd, irq_index, irq_cfg);
+
+ /* send command to mc*/
+ return mc_send_command(mc_io, &cmd);
+}
+
+int dpdmai_get_irq_enable(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ uint8_t irq_index,
+ uint8_t *en)
+{
+ struct mc_command cmd = { 0 };
+ int err;
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_GET_IRQ_ENABLE,
+ cmd_flags,
+ token);
+ DPDMAI_CMD_GET_IRQ_ENABLE(cmd, irq_index);
+
+ /* send command to mc*/
+ err = mc_send_command(mc_io, &cmd);
+ if (err)
+ return err;
+
+ /* retrieve response parameters */
+ DPDMAI_RSP_GET_IRQ_ENABLE(cmd, *en);
+
+ return 0;
+}
+
+int dpdmai_set_irq_enable(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ uint8_t irq_index,
+ uint8_t en)
+{
+ struct mc_command cmd = { 0 };
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_SET_IRQ_ENABLE,
+ cmd_flags,
+ token);
+ DPDMAI_CMD_SET_IRQ_ENABLE(cmd, irq_index, en);
+
+ /* send command to mc*/
+ return mc_send_command(mc_io, &cmd);
+}
+
+int dpdmai_get_irq_mask(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ uint8_t irq_index,
+ uint32_t *mask)
+{
+ struct mc_command cmd = { 0 };
+ int err;
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_GET_IRQ_MASK,
+ cmd_flags,
+ token);
+ DPDMAI_CMD_GET_IRQ_MASK(cmd, irq_index);
+
+ /* send command to mc*/
+ err = mc_send_command(mc_io, &cmd);
+ if (err)
+ return err;
+
+ /* retrieve response parameters */
+ DPDMAI_RSP_GET_IRQ_MASK(cmd, *mask);
+
+ return 0;
+}
+
+int dpdmai_set_irq_mask(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ uint8_t irq_index,
+ uint32_t mask)
+{
+ struct mc_command cmd = { 0 };
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_SET_IRQ_MASK,
+ cmd_flags,
+ token);
+ DPDMAI_CMD_SET_IRQ_MASK(cmd, irq_index, mask);
+
+ /* send command to mc*/
+ return mc_send_command(mc_io, &cmd);
+}
+
+int dpdmai_get_irq_status(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ uint8_t irq_index,
+ uint32_t *status)
+{
+ struct mc_command cmd = { 0 };
+ int err;
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_GET_IRQ_STATUS,
+ cmd_flags,
+ token);
+ DPDMAI_CMD_GET_IRQ_STATUS(cmd, irq_index, *status);
+
+ /* send command to mc*/
+ err = mc_send_command(mc_io, &cmd);
+ if (err)
+ return err;
+
+ /* retrieve response parameters */
+ DPDMAI_RSP_GET_IRQ_STATUS(cmd, *status);
+
+ return 0;
+}
+
+int dpdmai_clear_irq_status(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ uint8_t irq_index,
+ uint32_t status)
+{
+ struct mc_command cmd = { 0 };
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_CLEAR_IRQ_STATUS,
+ cmd_flags,
+ token);
+ DPDMAI_CMD_CLEAR_IRQ_STATUS(cmd, irq_index, status);
+
+ /* send command to mc*/
+ return mc_send_command(mc_io, &cmd);
+}
+
+int dpdmai_get_attributes(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ struct dpdmai_attr *attr)
+{
+ struct mc_command cmd = { 0 };
+ int err;
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_GET_ATTR,
+ cmd_flags,
+ token);
+
+ /* send command to mc*/
+ err = mc_send_command(mc_io, &cmd);
+ if (err)
+ return err;
+
+ /* retrieve response parameters */
+ DPDMAI_RSP_GET_ATTR(cmd, attr);
+
+ return 0;
+}
+
+int dpdmai_set_rx_queue(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ uint8_t priority,
+ const struct dpdmai_rx_queue_cfg *cfg)
+{
+ struct mc_command cmd = { 0 };
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_SET_RX_QUEUE,
+ cmd_flags,
+ token);
+ DPDMAI_CMD_SET_RX_QUEUE(cmd, priority, cfg);
+
+ /* send command to mc*/
+ return mc_send_command(mc_io, &cmd);
+}
+
+int dpdmai_get_rx_queue(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ uint8_t priority, struct dpdmai_rx_queue_attr *attr)
+{
+ struct mc_command cmd = { 0 };
+ int err;
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_GET_RX_QUEUE,
+ cmd_flags,
+ token);
+ DPDMAI_CMD_GET_RX_QUEUE(cmd, priority);
+
+ /* send command to mc*/
+ err = mc_send_command(mc_io, &cmd);
+ if (err)
+ return err;
+
+ /* retrieve response parameters */
+ DPDMAI_RSP_GET_RX_QUEUE(cmd, attr);
+
+ return 0;
+}
+
+int dpdmai_get_tx_queue(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ uint8_t priority,
+ struct dpdmai_tx_queue_attr *attr)
+{
+ struct mc_command cmd = { 0 };
+ int err;
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_GET_TX_QUEUE,
+ cmd_flags,
+ token);
+ DPDMAI_CMD_GET_TX_QUEUE(cmd, priority);
+
+ /* send command to mc*/
+ err = mc_send_command(mc_io, &cmd);
+ if (err)
+ return err;
+
+ /* retrieve response parameters */
+ DPDMAI_RSP_GET_TX_QUEUE(cmd, attr);
+
+ return 0;
+}
--- /dev/null
+++ b/drivers/dma/dpaa2-qdma/fsl_dpdmai.h
@@ -0,0 +1,521 @@
+/* Copyright 2013-2015 Freescale Semiconductor Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of the above-listed copyright holders nor the
+ * names of any contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef __FSL_DPDMAI_H
+#define __FSL_DPDMAI_H
+
+struct fsl_mc_io;
+
+/* Data Path DMA Interface API
+ * Contains initialization APIs and runtime control APIs for DPDMAI
+ */
+
+/* General DPDMAI macros */
+
+/**
+ * Maximum number of Tx/Rx priorities per DPDMAI object
+ */
+#define DPDMAI_PRIO_NUM 2
+
+/**
+ * All queues considered; see dpdmai_set_rx_queue()
+ */
+#define DPDMAI_ALL_QUEUES (uint8_t)(-1)
+
+/**
+ * dpdmai_open() - Open a control session for the specified object
+ * @mc_io: Pointer to MC portal's I/O object
+ * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
+ * @dpdmai_id: DPDMAI unique ID
+ * @token: Returned token; use in subsequent API calls
+ *
+ * This function can be used to open a control session for an
+ * already created object; an object may have been declared in
+ * the DPL or by calling the dpdmai_create() function.
+ * This function returns a unique authentication token,
+ * associated with the specific object ID and the specific MC
+ * portal; this token must be used in all subsequent commands for
+ * this specific object.
+ *
+ * Return: '0' on Success; Error code otherwise.
+ */
+int dpdmai_open(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ int dpdmai_id,
+ uint16_t *token);
+
+/**
+ * dpdmai_close() - Close the control session of the object
+ * @mc_io: Pointer to MC portal's I/O object
+ * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token: Token of DPDMAI object
+ *
+ * After this function is called, no further operations are
+ * allowed on the object without opening a new control session.
+ *
+ * Return: '0' on Success; Error code otherwise.
+ */
+int dpdmai_close(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token);
+
+/**
+ * struct dpdmai_cfg - Structure representing DPDMAI configuration
+ * @priorities: Priorities for the DMA hardware processing; valid priorities are
+ * configured with values 1-8; the entry following last valid entry
+ * should be configured with 0
+ */
+struct dpdmai_cfg {
+ uint8_t priorities[DPDMAI_PRIO_NUM];
+};
+
+/**
+ * dpdmai_create() - Create the DPDMAI object
+ * @mc_io: Pointer to MC portal's I/O object
+ * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
+ * @cfg: Configuration structure
+ * @token: Returned token; use in subsequent API calls
+ *
+ * Create the DPDMAI object, allocate required resources and
+ * perform required initialization.
+ *
+ * The object can be created either by declaring it in the
+ * DPL file, or by calling this function.
+ *
+ * This function returns a unique authentication token,
+ * associated with the specific object ID and the specific MC
+ * portal; this token must be used in all subsequent calls to
+ * this specific object. For objects that are created using the
+ * DPL file, call dpdmai_open() function to get an authentication
+ * token first.
+ *
+ * Return: '0' on Success; Error code otherwise.
+ */
+int dpdmai_create(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ const struct dpdmai_cfg *cfg,
+ uint16_t *token);
+
+/**
+ * dpdmai_destroy() - Destroy the DPDMAI object and release all its resources.
+ * @mc_io: Pointer to MC portal's I/O object
+ * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token: Token of DPDMAI object
+ *
+ * Return: '0' on Success; error code otherwise.
+ */
+int dpdmai_destroy(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token);
+
+/**
+ * dpdmai_enable() - Enable the DPDMAI, allow sending and receiving frames.
+ * @mc_io: Pointer to MC portal's I/O object
+ * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token: Token of DPDMAI object
+ *
+ * Return: '0' on Success; Error code otherwise.
+ */
+int dpdmai_enable(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token);
+
+/**
+ * dpdmai_disable() - Disable the DPDMAI, stop sending and receiving frames.
+ * @mc_io: Pointer to MC portal's I/O object
+ * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token: Token of DPDMAI object
+ *
+ * Return: '0' on Success; Error code otherwise.
+ */
+int dpdmai_disable(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token);
+
+/**
+ * dpdmai_is_enabled() - Check if the DPDMAI is enabled.
+ * @mc_io: Pointer to MC portal's I/O object
+ * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token: Token of DPDMAI object
+ * @en: Returns '1' if object is enabled; '0' otherwise
+ *
+ * Return: '0' on Success; Error code otherwise.
+ */
+int dpdmai_is_enabled(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ int *en);
+
+/**
+ * dpdmai_reset() - Reset the DPDMAI, returns the object to initial state.
+ * @mc_io: Pointer to MC portal's I/O object
+ * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token: Token of DPDMAI object
+ *
+ * Return: '0' on Success; Error code otherwise.
+ */
+int dpdmai_reset(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token);
+
+/**
+ * struct dpdmai_irq_cfg - IRQ configuration
+ * @addr: Address that must be written to signal a message-based interrupt
+ * @val: Value to write into irq_addr address
+ * @irq_num: A user defined number associated with this IRQ
+ */
+struct dpdmai_irq_cfg {
+ uint64_t addr;
+ uint32_t val;
+ int irq_num;
+};
+
+/**
+ * dpdmai_set_irq() - Set IRQ information for the DPDMAI to trigger an interrupt.
+ * @mc_io: Pointer to MC portal's I/O object
+ * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token: Token of DPDMAI object
+ * @irq_index: Identifies the interrupt index to configure
+ * @irq_cfg: IRQ configuration
+ *
+ * Return: '0' on Success; Error code otherwise.
+ */
+int dpdmai_set_irq(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ uint8_t irq_index,
+ struct dpdmai_irq_cfg *irq_cfg);
+
+/**
+ * dpdmai_get_irq() - Get IRQ information from the DPDMAI
+ *
+ * @mc_io: Pointer to MC portal's I/O object
+ * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token: Token of DPDMAI object
+ * @irq_index: The interrupt index to configure
+ * @type: Interrupt type: 0 represents message interrupt
+ * type (both irq_addr and irq_val are valid)
+ * @irq_cfg: IRQ attributes
+ *
+ * Return: '0' on Success; Error code otherwise.
+ */
+int dpdmai_get_irq(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ uint8_t irq_index,
+ int *type,
+ struct dpdmai_irq_cfg *irq_cfg);
+
+/**
+ * dpdmai_set_irq_enable() - Set overall interrupt state.
+ * @mc_io: Pointer to MC portal's I/O object
+ * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token: Token of DPDMAI object
+ * @irq_index: The interrupt index to configure
+ * @en: Interrupt state - enable = 1, disable = 0
+ *
+ * Allows GPP software to control when interrupts are generated.
+ * Each interrupt can have up to 32 causes. The enable/disable control's the
+ * overall interrupt state. if the interrupt is disabled no causes will cause
+ * an interrupt
+ *
+ * Return: '0' on Success; Error code otherwise.
+ */
+int dpdmai_set_irq_enable(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ uint8_t irq_index,
+ uint8_t en);
+
+/**
+ * dpdmai_get_irq_enable() - Get overall interrupt state
+ * @mc_io: Pointer to MC portal's I/O object
+ * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token: Token of DPDMAI object
+ * @irq_index: The interrupt index to configure
+ * @en: Returned Interrupt state - enable = 1, disable = 0
+ *
+ * Return: '0' on Success; Error code otherwise.
+ */
+int dpdmai_get_irq_enable(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ uint8_t irq_index,
+ uint8_t *en);
+
+/**
+ * dpdmai_set_irq_mask() - Set interrupt mask.
+ * @mc_io: Pointer to MC portal's I/O object
+ * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token: Token of DPDMAI object
+ * @irq_index: The interrupt index to configure
+ * @mask: event mask to trigger interrupt;
+ * each bit:
+ * 0 = ignore event
+ * 1 = consider event for asserting IRQ
+ *
+ * Every interrupt can have up to 32 causes and the interrupt model supports
+ * masking/unmasking each cause independently
+ *
+ * Return: '0' on Success; Error code otherwise.
+ */
+int dpdmai_set_irq_mask(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ uint8_t irq_index,
+ uint32_t mask);
+
+/**
+ * dpdmai_get_irq_mask() - Get interrupt mask.
+ * @mc_io: Pointer to MC portal's I/O object
+ * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token: Token of DPDMAI object
+ * @irq_index: The interrupt index to configure
+ * @mask: Returned event mask to trigger interrupt
+ *
+ * Every interrupt can have up to 32 causes and the interrupt model supports
+ * masking/unmasking each cause independently
+ *
+ * Return: '0' on Success; Error code otherwise.
+ */
+int dpdmai_get_irq_mask(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ uint8_t irq_index,
+ uint32_t *mask);
+
+/**
+ * dpdmai_get_irq_status() - Get the current status of any pending interrupts
+ * @mc_io: Pointer to MC portal's I/O object
+ * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token: Token of DPDMAI object
+ * @irq_index: The interrupt index to configure
+ * @status: Returned interrupts status - one bit per cause:
+ * 0 = no interrupt pending
+ * 1 = interrupt pending
+ *
+ * Return: '0' on Success; Error code otherwise.
+ */
+int dpdmai_get_irq_status(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ uint8_t irq_index,
+ uint32_t *status);
+
+/**
+ * dpdmai_clear_irq_status() - Clear a pending interrupt's status
+ * @mc_io: Pointer to MC portal's I/O object
+ * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token: Token of DPDMAI object
+ * @irq_index: The interrupt index to configure
+ * @status: bits to clear (W1C) - one bit per cause:
+ * 0 = don't change
+ * 1 = clear status bit
+ *
+ * Return: '0' on Success; Error code otherwise.
+ */
+int dpdmai_clear_irq_status(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ uint8_t irq_index,
+ uint32_t status);
+
+/**
+ * struct dpdmai_attr - Structure representing DPDMAI attributes
+ * @id: DPDMAI object ID
+ * @version: DPDMAI version
+ * @num_of_priorities: number of priorities
+ */
+struct dpdmai_attr {
+ int id;
+ /**
+ * struct version - DPDMAI version
+ * @major: DPDMAI major version
+ * @minor: DPDMAI minor version
+ */
+ struct {
+ uint16_t major;
+ uint16_t minor;
+ } version;
+ uint8_t num_of_priorities;
+};
+
+/**
+ * dpdmai_get_attributes() - Retrieve DPDMAI attributes.
+ * @mc_io: Pointer to MC portal's I/O object
+ * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token: Token of DPDMAI object
+ * @attr: Returned object's attributes
+ *
+ * Return: '0' on Success; Error code otherwise.
+ */
+int dpdmai_get_attributes(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ struct dpdmai_attr *attr);
+
+/**
+ * enum dpdmai_dest - DPDMAI destination types
+ * @DPDMAI_DEST_NONE: Unassigned destination; The queue is set in parked mode
+ * and does not generate FQDAN notifications; user is expected to dequeue
+ * from the queue based on polling or other user-defined method
+ * @DPDMAI_DEST_DPIO: The queue is set in schedule mode and generates FQDAN
+ * notifications to the specified DPIO; user is expected to dequeue
+ * from the queue only after notification is received
+ * @DPDMAI_DEST_DPCON: The queue is set in schedule mode and does not generate
+ * FQDAN notifications, but is connected to the specified DPCON object;
+ * user is expected to dequeue from the DPCON channel
+ */
+enum dpdmai_dest {
+ DPDMAI_DEST_NONE = 0,
+ DPDMAI_DEST_DPIO = 1,
+ DPDMAI_DEST_DPCON = 2
+};
+
+/**
+ * struct dpdmai_dest_cfg - Structure representing DPDMAI destination parameters
+ * @dest_type: Destination type
+ * @dest_id: Either DPIO ID or DPCON ID, depending on the destination type
+ * @priority: Priority selection within the DPIO or DPCON channel; valid values
+ * are 0-1 or 0-7, depending on the number of priorities in that
+ * channel; not relevant for 'DPDMAI_DEST_NONE' option
+ */
+struct dpdmai_dest_cfg {
+ enum dpdmai_dest dest_type;
+ int dest_id;
+ uint8_t priority;
+};
+
+/* DPDMAI queue modification options */
+
+/**
+ * Select to modify the user's context associated with the queue
+ */
+#define DPDMAI_QUEUE_OPT_USER_CTX 0x00000001
+
+/**
+ * Select to modify the queue's destination
+ */
+#define DPDMAI_QUEUE_OPT_DEST 0x00000002
+
+/**
+ * struct dpdmai_rx_queue_cfg - DPDMAI RX queue configuration
+ * @options: Flags representing the suggested modifications to the queue;
+ * Use any combination of 'DPDMAI_QUEUE_OPT_<X>' flags
+ * @user_ctx: User context value provided in the frame descriptor of each
+ * dequeued frame;
+ * valid only if 'DPDMAI_QUEUE_OPT_USER_CTX' is contained in 'options'
+ * @dest_cfg: Queue destination parameters;
+ * valid only if 'DPDMAI_QUEUE_OPT_DEST' is contained in 'options'
+ */
+struct dpdmai_rx_queue_cfg {
+ uint32_t options;
+ uint64_t user_ctx;
+ struct dpdmai_dest_cfg dest_cfg;
+
+};
+
+/**
+ * dpdmai_set_rx_queue() - Set Rx queue configuration
+ * @mc_io: Pointer to MC portal's I/O object
+ * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token: Token of DPDMAI object
+ * @priority: Select the queue relative to number of
+ * priorities configured at DPDMAI creation; use
+ * DPDMAI_ALL_QUEUES to configure all Rx queues
+ * identically.
+ * @cfg: Rx queue configuration
+ *
+ * Return: '0' on Success; Error code otherwise.
+ */
+int dpdmai_set_rx_queue(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ uint8_t priority,
+ const struct dpdmai_rx_queue_cfg *cfg);
+
+/**
+ * struct dpdmai_rx_queue_attr - Structure representing attributes of Rx queues
+ * @user_ctx: User context value provided in the frame descriptor of each
+ * dequeued frame
+ * @dest_cfg: Queue destination configuration
+ * @fqid: Virtual FQID value to be used for dequeue operations
+ */
+struct dpdmai_rx_queue_attr {
+ uint64_t user_ctx;
+ struct dpdmai_dest_cfg dest_cfg;
+ uint32_t fqid;
+};
+
+/**
+ * dpdmai_get_rx_queue() - Retrieve Rx queue attributes.
+ * @mc_io: Pointer to MC portal's I/O object
+ * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token: Token of DPDMAI object
+ * @priority: Select the queue relative to number of
+ * priorities configured at DPDMAI creation
+ * @attr: Returned Rx queue attributes
+ *
+ * Return: '0' on Success; Error code otherwise.
+ */
+int dpdmai_get_rx_queue(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ uint8_t priority,
+ struct dpdmai_rx_queue_attr *attr);
+
+/**
+ * struct dpdmai_tx_queue_attr - Structure representing attributes of Tx queues
+ * @fqid: Virtual FQID to be used for sending frames to DMA hardware
+ */
+
+struct dpdmai_tx_queue_attr {
+ uint32_t fqid;
+};
+
+/**
+ * dpdmai_get_tx_queue() - Retrieve Tx queue attributes.
+ * @mc_io: Pointer to MC portal's I/O object
+ * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token: Token of DPDMAI object
+ * @priority: Select the queue relative to number of
+ * priorities configured at DPDMAI creation
+ * @attr: Returned Tx queue attributes
+ *
+ * Return: '0' on Success; Error code otherwise.
+ */
+int dpdmai_get_tx_queue(struct fsl_mc_io *mc_io,
+ uint32_t cmd_flags,
+ uint16_t token,
+ uint8_t priority,
+ struct dpdmai_tx_queue_attr *attr);
+
+#endif /* __FSL_DPDMAI_H */
--- /dev/null
+++ b/drivers/dma/dpaa2-qdma/fsl_dpdmai_cmd.h
@@ -0,0 +1,222 @@
+/* Copyright 2013-2016 Freescale Semiconductor Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of the above-listed copyright holders nor the
+ * names of any contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef _FSL_DPDMAI_CMD_H
+#define _FSL_DPDMAI_CMD_H
+
+/* DPDMAI Version */
+#define DPDMAI_VER_MAJOR 2
+#define DPDMAI_VER_MINOR 2
+
+#define DPDMAI_CMD_BASE_VERSION 0
+#define DPDMAI_CMD_ID_OFFSET 4
+
+/* Command IDs */
+#define DPDMAI_CMDID_CLOSE ((0x800 << DPDMAI_CMD_ID_OFFSET) | DPDMAI_CMD_BASE_VERSION)
+#define DPDMAI_CMDID_OPEN ((0x80E << DPDMAI_CMD_ID_OFFSET) | DPDMAI_CMD_BASE_VERSION)
+#define DPDMAI_CMDID_CREATE ((0x90E << DPDMAI_CMD_ID_OFFSET) | DPDMAI_CMD_BASE_VERSION)
+#define DPDMAI_CMDID_DESTROY ((0x900 << DPDMAI_CMD_ID_OFFSET) | DPDMAI_CMD_BASE_VERSION)
+
+#define DPDMAI_CMDID_ENABLE ((0x002 << DPDMAI_CMD_ID_OFFSET) | DPDMAI_CMD_BASE_VERSION)
+#define DPDMAI_CMDID_DISABLE ((0x003 << DPDMAI_CMD_ID_OFFSET) | DPDMAI_CMD_BASE_VERSION)
+#define DPDMAI_CMDID_GET_ATTR ((0x004 << DPDMAI_CMD_ID_OFFSET) | DPDMAI_CMD_BASE_VERSION)
+#define DPDMAI_CMDID_RESET ((0x005 << DPDMAI_CMD_ID_OFFSET) | DPDMAI_CMD_BASE_VERSION)
+#define DPDMAI_CMDID_IS_ENABLED ((0x006 << DPDMAI_CMD_ID_OFFSET) | DPDMAI_CMD_BASE_VERSION)
+
+#define DPDMAI_CMDID_SET_IRQ ((0x010 << DPDMAI_CMD_ID_OFFSET) | DPDMAI_CMD_BASE_VERSION)
+#define DPDMAI_CMDID_GET_IRQ ((0x011 << DPDMAI_CMD_ID_OFFSET) | DPDMAI_CMD_BASE_VERSION)
+#define DPDMAI_CMDID_SET_IRQ_ENABLE ((0x012 << DPDMAI_CMD_ID_OFFSET) | DPDMAI_CMD_BASE_VERSION)
+#define DPDMAI_CMDID_GET_IRQ_ENABLE ((0x013 << DPDMAI_CMD_ID_OFFSET) | DPDMAI_CMD_BASE_VERSION)
+#define DPDMAI_CMDID_SET_IRQ_MASK ((0x014 << DPDMAI_CMD_ID_OFFSET) | DPDMAI_CMD_BASE_VERSION)
+#define DPDMAI_CMDID_GET_IRQ_MASK ((0x015 << DPDMAI_CMD_ID_OFFSET) | DPDMAI_CMD_BASE_VERSION)
+#define DPDMAI_CMDID_GET_IRQ_STATUS ((0x016 << DPDMAI_CMD_ID_OFFSET) | DPDMAI_CMD_BASE_VERSION)
+#define DPDMAI_CMDID_CLEAR_IRQ_STATUS ((0x017 << DPDMAI_CMD_ID_OFFSET) | DPDMAI_CMD_BASE_VERSION)
+
+#define DPDMAI_CMDID_SET_RX_QUEUE ((0x1A0 << DPDMAI_CMD_ID_OFFSET) | DPDMAI_CMD_BASE_VERSION)
+#define DPDMAI_CMDID_GET_RX_QUEUE ((0x1A1 << DPDMAI_CMD_ID_OFFSET) | DPDMAI_CMD_BASE_VERSION)
+#define DPDMAI_CMDID_GET_TX_QUEUE ((0x1A2 << DPDMAI_CMD_ID_OFFSET) | DPDMAI_CMD_BASE_VERSION)
+
+
+#define MC_CMD_HDR_TOKEN_O 32 /* Token field offset */
+#define MC_CMD_HDR_TOKEN_S 16 /* Token field size */
+
+
+#define MAKE_UMASK64(_width) \
+ ((uint64_t)((_width) < 64 ? ((uint64_t)1 << (_width)) - 1 : \
+ (uint64_t)-1))
+
+static inline uint64_t mc_enc(int lsoffset, int width, uint64_t val)
+{
+ return (uint64_t)(((uint64_t)val & MAKE_UMASK64(width)) << lsoffset);
+}
+
+static inline uint64_t mc_dec(uint64_t val, int lsoffset, int width)
+{
+ return (uint64_t)((val >> lsoffset) & MAKE_UMASK64(width));
+}
+
+#define MC_CMD_OP(_cmd, _param, _offset, _width, _type, _arg) \
+ ((_cmd).params[_param] |= mc_enc((_offset), (_width), _arg))
+
+#define MC_RSP_OP(_cmd, _param, _offset, _width, _type, _arg) \
+ (_arg = (_type)mc_dec(_cmd.params[_param], (_offset), (_width)))
+
+#define MC_CMD_HDR_READ_TOKEN(_hdr) \
+ ((uint16_t)mc_dec((_hdr), MC_CMD_HDR_TOKEN_O, MC_CMD_HDR_TOKEN_S))
+
+/* cmd, param, offset, width, type, arg_name */
+#define DPDMAI_CMD_OPEN(cmd, dpdmai_id) \
+ MC_CMD_OP(cmd, 0, 0, 32, int, dpdmai_id)
+
+/* cmd, param, offset, width, type, arg_name */
+#define DPDMAI_CMD_CREATE(cmd, cfg) \
+do { \
+ MC_CMD_OP(cmd, 0, 8, 8, uint8_t, cfg->priorities[0]);\
+ MC_CMD_OP(cmd, 0, 16, 8, uint8_t, cfg->priorities[1]);\
+} while (0)
+
+/* cmd, param, offset, width, type, arg_name */
+#define DPDMAI_RSP_IS_ENABLED(cmd, en) \
+ MC_RSP_OP(cmd, 0, 0, 1, int, en)
+
+/* cmd, param, offset, width, type, arg_name */
+#define DPDMAI_CMD_SET_IRQ(cmd, irq_index, irq_cfg) \
+do { \
+ MC_CMD_OP(cmd, 0, 0, 8, uint8_t, irq_index);\
+ MC_CMD_OP(cmd, 0, 32, 32, uint32_t, irq_cfg->val);\
+ MC_CMD_OP(cmd, 1, 0, 64, uint64_t, irq_cfg->addr);\
+ MC_CMD_OP(cmd, 2, 0, 32, int, irq_cfg->irq_num); \
+} while (0)
+
+/* cmd, param, offset, width, type, arg_name */
+#define DPDMAI_CMD_GET_IRQ(cmd, irq_index) \
+ MC_CMD_OP(cmd, 0, 32, 8, uint8_t, irq_index)
+
+/* cmd, param, offset, width, type, arg_name */
+#define DPDMAI_RSP_GET_IRQ(cmd, type, irq_cfg) \
+do { \
+ MC_RSP_OP(cmd, 0, 0, 32, uint32_t, irq_cfg->val); \
+ MC_RSP_OP(cmd, 1, 0, 64, uint64_t, irq_cfg->addr);\
+ MC_RSP_OP(cmd, 2, 0, 32, int, irq_cfg->irq_num); \
+ MC_RSP_OP(cmd, 2, 32, 32, int, type); \
+} while (0)
+
+/* cmd, param, offset, width, type, arg_name */
+#define DPDMAI_CMD_SET_IRQ_ENABLE(cmd, irq_index, enable_state) \
+do { \
+ MC_CMD_OP(cmd, 0, 0, 8, uint8_t, enable_state); \
+ MC_CMD_OP(cmd, 0, 32, 8, uint8_t, irq_index); \
+} while (0)
+
+/* cmd, param, offset, width, type, arg_name */
+#define DPDMAI_CMD_GET_IRQ_ENABLE(cmd, irq_index) \
+ MC_CMD_OP(cmd, 0, 32, 8, uint8_t, irq_index)
+
+/* cmd, param, offset, width, type, arg_name */
+#define DPDMAI_RSP_GET_IRQ_ENABLE(cmd, enable_state) \
+ MC_RSP_OP(cmd, 0, 0, 8, uint8_t, enable_state)
+
+/* cmd, param, offset, width, type, arg_name */
+#define DPDMAI_CMD_SET_IRQ_MASK(cmd, irq_index, mask) \
+do { \
+ MC_CMD_OP(cmd, 0, 0, 32, uint32_t, mask); \
+ MC_CMD_OP(cmd, 0, 32, 8, uint8_t, irq_index); \
+} while (0)
+
+/* cmd, param, offset, width, type, arg_name */
+#define DPDMAI_CMD_GET_IRQ_MASK(cmd, irq_index) \
+ MC_CMD_OP(cmd, 0, 32, 8, uint8_t, irq_index)
+
+/* cmd, param, offset, width, type, arg_name */
+#define DPDMAI_RSP_GET_IRQ_MASK(cmd, mask) \
+ MC_RSP_OP(cmd, 0, 0, 32, uint32_t, mask)
+
+/* cmd, param, offset, width, type, arg_name */
+#define DPDMAI_CMD_GET_IRQ_STATUS(cmd, irq_index, status) \
+do { \
+ MC_CMD_OP(cmd, 0, 0, 32, uint32_t, status);\
+ MC_CMD_OP(cmd, 0, 32, 8, uint8_t, irq_index);\
+} while (0)
+
+/* cmd, param, offset, width, type, arg_name */
+#define DPDMAI_RSP_GET_IRQ_STATUS(cmd, status) \
+ MC_RSP_OP(cmd, 0, 0, 32, uint32_t, status)
+
+/* cmd, param, offset, width, type, arg_name */
+#define DPDMAI_CMD_CLEAR_IRQ_STATUS(cmd, irq_index, status) \
+do { \
+ MC_CMD_OP(cmd, 0, 0, 32, uint32_t, status); \
+ MC_CMD_OP(cmd, 0, 32, 8, uint8_t, irq_index); \
+} while (0)
+
+/* cmd, param, offset, width, type, arg_name */
+#define DPDMAI_RSP_GET_ATTR(cmd, attr) \
+do { \
+ MC_RSP_OP(cmd, 0, 0, 32, int, attr->id); \
+ MC_RSP_OP(cmd, 0, 32, 8, uint8_t, attr->num_of_priorities); \
+ MC_RSP_OP(cmd, 1, 0, 16, uint16_t, attr->version.major);\
+ MC_RSP_OP(cmd, 1, 16, 16, uint16_t, attr->version.minor);\
+} while (0)
+
+/* cmd, param, offset, width, type, arg_name */
+#define DPDMAI_CMD_SET_RX_QUEUE(cmd, priority, cfg) \
+do { \
+ MC_CMD_OP(cmd, 0, 0, 32, int, cfg->dest_cfg.dest_id); \
+ MC_CMD_OP(cmd, 0, 32, 8, uint8_t, cfg->dest_cfg.priority); \
+ MC_CMD_OP(cmd, 0, 40, 8, uint8_t, priority); \
+ MC_CMD_OP(cmd, 0, 48, 4, enum dpdmai_dest, cfg->dest_cfg.dest_type); \
+ MC_CMD_OP(cmd, 1, 0, 64, uint64_t, cfg->user_ctx); \
+ MC_CMD_OP(cmd, 2, 0, 32, uint32_t, cfg->options);\
+} while (0)
+
+/* cmd, param, offset, width, type, arg_name */
+#define DPDMAI_CMD_GET_RX_QUEUE(cmd, priority) \
+ MC_CMD_OP(cmd, 0, 40, 8, uint8_t, priority)
+
+/* cmd, param, offset, width, type, arg_name */
+#define DPDMAI_RSP_GET_RX_QUEUE(cmd, attr) \
+do { \
+ MC_RSP_OP(cmd, 0, 0, 32, int, attr->dest_cfg.dest_id);\
+ MC_RSP_OP(cmd, 0, 32, 8, uint8_t, attr->dest_cfg.priority);\
+ MC_RSP_OP(cmd, 0, 48, 4, enum dpdmai_dest, attr->dest_cfg.dest_type);\
+ MC_RSP_OP(cmd, 1, 0, 64, uint64_t, attr->user_ctx);\
+ MC_RSP_OP(cmd, 2, 0, 32, uint32_t, attr->fqid);\
+} while (0)
+
+/* cmd, param, offset, width, type, arg_name */
+#define DPDMAI_CMD_GET_TX_QUEUE(cmd, priority) \
+ MC_CMD_OP(cmd, 0, 40, 8, uint8_t, priority)
+
+/* cmd, param, offset, width, type, arg_name */
+#define DPDMAI_RSP_GET_TX_QUEUE(cmd, attr) \
+ MC_RSP_OP(cmd, 1, 0, 32, uint32_t, attr->fqid)
+
+#endif /* _FSL_DPDMAI_CMD_H */
--- /dev/null
+++ b/drivers/dma/fsl-qdma.c
@@ -0,0 +1,1243 @@
+/*
+ * drivers/dma/fsl-qdma.c
+ *
+ * Copyright 2014-2015 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.
+ */
+
+#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/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 "virt-dma.h"
+
+#define FSL_QDMA_DMR 0x0
+#define FSL_QDMA_DSR 0x4
+#define FSL_QDMA_DEIER 0xe00
+#define FSL_QDMA_DEDR 0xe04
+#define FSL_QDMA_DECFDW0R 0xe10
+#define FSL_QDMA_DECFDW1R 0xe14
+#define FSL_QDMA_DECFDW2R 0xe18
+#define FSL_QDMA_DECFDW3R 0xe1c
+#define FSL_QDMA_DECFQIDR 0xe30
+#define FSL_QDMA_DECBR 0xe34
+
+#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_SQCCMR 0xa20
+
+#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_SQCCMR_ENTER_WM 0x200000
+
+#define FSL_QDMA_QUEUE_MAX 8
+
+#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_BCQSR_XOFF 0x1
+
+#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_BASE_BUFFER_SIZE 96
+#define FSL_QDMA_EXPECT_SG_ENTRY_NUM 16
+#define FSL_QDMA_CIRCULAR_DESC_SIZE_MIN 64
+#define FSL_QDMA_CIRCULAR_DESC_SIZE_MAX 16384
+#define FSL_QDMA_QUEUE_NUM_MAX 8
+
+#define FSL_QDMA_CMD_RWTTYPE 0x4
+#define FSL_QDMA_CMD_LWC 0x2
+
+#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_F_LAST_ENTRY 1
+
+u64 pre_addr, pre_queue;
+
+/* qDMA Command Descriptor Fotmats */
+
+/* Compound Command Descriptor Fotmat */
+struct fsl_qdma_ccdf {
+ __le32 status; /* ser, status */
+ __le32 cfg; /* format, offset */
+ union {
+ struct {
+ __le32 addr_lo; /* low 32-bits of 40-bit address */
+ u8 addr_hi; /* high 8-bits of 40-bit address */
+ u8 __reserved1[2];
+ u8 cfg8b_w1; /* dd, queue*/
+ } __packed;
+ __le64 data;
+ };
+} __packed;
+
+#define QDMA_CCDF_STATUS 20
+#define QDMA_CCDF_OFFSET 20
+#define QDMA_CCDF_MASK GENMASK(28, 20)
+#define QDMA_CCDF_FOTMAT BIT(29)
+#define QDMA_CCDF_SER BIT(30)
+
+static inline u64 qdma_ccdf_addr_get64(const struct fsl_qdma_ccdf *ccdf)
+{
+ return le64_to_cpu(ccdf->data) & 0xffffffffffLLU;
+}
+static inline u64 qdma_ccdf_get_queue(const struct fsl_qdma_ccdf *ccdf)
+{
+ return ccdf->cfg8b_w1 & 0xff;
+}
+static inline void qdma_ccdf_addr_set64(struct fsl_qdma_ccdf *ccdf, u64 addr)
+{
+ ccdf->addr_hi = upper_32_bits(addr);
+ ccdf->addr_lo = cpu_to_le32(lower_32_bits(addr));
+}
+static inline int qdma_ccdf_get_offset(const struct fsl_qdma_ccdf *ccdf)
+{
+ return (le32_to_cpu(ccdf->cfg) & QDMA_CCDF_MASK) >> QDMA_CCDF_OFFSET;
+}
+static inline void qdma_ccdf_set_format(struct fsl_qdma_ccdf *ccdf, int offset)
+{
+ ccdf->cfg = cpu_to_le32(QDMA_CCDF_FOTMAT | offset);
+}
+static inline int qdma_ccdf_get_status(const struct fsl_qdma_ccdf *ccdf)
+{
+ return (le32_to_cpu(ccdf->status) & QDMA_CCDF_MASK) >> QDMA_CCDF_STATUS;
+}
+static inline void qdma_ccdf_set_ser(struct fsl_qdma_ccdf *ccdf, int status)
+{
+ ccdf->status = cpu_to_le32(QDMA_CCDF_SER | status);
+}
+/* qDMA Compound S/G Format */
+struct fsl_qdma_csgf {
+ __le32 offset; /* offset */
+ __le32 cfg; /* E bit, F bit, length */
+ union {
+ struct {
+ __le32 addr_lo; /* low 32-bits of 40-bit address */
+ u8 addr_hi; /* high 8-bits of 40-bit address */
+ u8 __reserved1[3];
+ };
+ __le64 data;
+ };
+} __packed;
+
+#define QDMA_SG_FIN BIT(30)
+#define QDMA_SG_EXT BIT(31)
+#define QDMA_SG_LEN_MASK GENMASK(29, 0)
+static inline u64 qdma_csgf_addr_get64(const struct fsl_qdma_csgf *sg)
+{
+ return be64_to_cpu(sg->data) & 0xffffffffffLLU;
+}
+static inline void qdma_csgf_addr_set64(struct fsl_qdma_csgf *sg, u64 addr)
+{
+ sg->addr_hi = upper_32_bits(addr);
+ sg->addr_lo = cpu_to_le32(lower_32_bits(addr));
+}
+static inline void qdma_csgf_set_len(struct fsl_qdma_csgf *csgf, int len)
+{
+ csgf->cfg = cpu_to_le32(len & QDMA_SG_LEN_MASK);
+}
+static inline void qdma_csgf_set_f(struct fsl_qdma_csgf *csgf, int len)
+{
+ csgf->cfg = cpu_to_le32(QDMA_SG_FIN | (len & QDMA_SG_LEN_MASK));
+}
+static inline void qdma_csgf_set_e(struct fsl_qdma_csgf *csgf, int len)
+{
+ csgf->cfg = cpu_to_le32(QDMA_SG_EXT | (len & QDMA_SG_LEN_MASK));
+}
+
+/* qDMA Source Descriptor Format */
+struct fsl_qdma_sdf {
+ __le32 rev3;
+ __le32 cfg; /* rev4, bit[0-11] - ssd, bit[12-23] sss */
+ __le32 rev5;
+ __le32 cmd;
+} __packed;
+
+/*qDMA Destination Descriptor Format*/
+struct fsl_qdma_ddf {
+ __le32 rev1;
+ __le32 cfg; /* rev2, bit[0-11] - dsd, bit[12-23] - dss */
+ __le32 rev3;
+ __le32 cmd;
+} __packed;
+
+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 *status_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[];
+
+};
+
+static u32 qdma_readl(struct fsl_qdma_engine *qdma, void __iomem *addr)
+{
+ if (qdma->big_endian)
+ return ioread32be(addr);
+ else
+ return ioread32(addr);
+}
+
+static void qdma_writel(struct fsl_qdma_engine *qdma, u32 val,
+ void __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);
+}
+
+static int fsl_qdma_alloc_chan_resources(struct dma_chan *chan)
+{
+ /*
+ * In QDMA mode, We don't need to do anything.
+ */
+ return 0;
+}
+
+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_ccdf *ccdf;
+ struct fsl_qdma_csgf *csgf_desc, *csgf_src, *csgf_dest;
+ struct fsl_qdma_sdf *sdf;
+ struct fsl_qdma_ddf *ddf;
+
+ ccdf = (struct fsl_qdma_ccdf *)fsl_comp->virt_addr;
+ csgf_desc = (struct fsl_qdma_csgf *)fsl_comp->virt_addr + 1;
+ csgf_src = (struct fsl_qdma_csgf *)fsl_comp->virt_addr + 2;
+ csgf_dest = (struct fsl_qdma_csgf *)fsl_comp->virt_addr + 3;
+ sdf = (struct fsl_qdma_sdf *)fsl_comp->virt_addr + 4;
+ ddf = (struct fsl_qdma_ddf *)fsl_comp->virt_addr + 5;
+
+ memset(fsl_comp->virt_addr, 0, FSL_QDMA_BASE_BUFFER_SIZE);
+ /* Head Command Descriptor(Frame Descriptor) */
+ qdma_ccdf_addr_set64(ccdf, fsl_comp->bus_addr + 16);
+ qdma_ccdf_set_format(ccdf, qdma_ccdf_get_offset(ccdf));
+ qdma_ccdf_set_ser(ccdf, qdma_ccdf_get_status(ccdf));
+ /* Status notification is enqueued to status queue. */
+ /* Compound Command Descriptor(Frame List Table) */
+ qdma_csgf_addr_set64(csgf_desc, fsl_comp->bus_addr + 64);
+ /* It must be 32 as Compound S/G Descriptor */
+ qdma_csgf_set_len(csgf_desc, 32);
+ qdma_csgf_addr_set64(csgf_src, src);
+ qdma_csgf_set_len(csgf_src, len);
+ qdma_csgf_addr_set64(csgf_dest, dst);
+ qdma_csgf_set_len(csgf_dest, len);
+ /* This entry is the last entry. */
+ qdma_csgf_set_f(csgf_dest, len);
+ /* Descriptor Buffer */
+ sdf->cmd = cpu_to_le32(
+ FSL_QDMA_CMD_RWTTYPE << FSL_QDMA_CMD_RWTTYPE_OFFSET);
+ ddf->cmd = cpu_to_le32(
+ FSL_QDMA_CMD_RWTTYPE << FSL_QDMA_CMD_RWTTYPE_OFFSET);
+ ddf->cmd |= cpu_to_le32(
+ FSL_QDMA_CMD_LWC << FSL_QDMA_CMD_LWC_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_ccdf *ccdf;
+ struct fsl_qdma_csgf *csgf_desc, *csgf_src, *csgf_dest, *csgf_sg;
+ struct fsl_qdma_sdf *sdf;
+ struct fsl_qdma_ddf *ddf;
+ struct fsl_qdma_sg *sg_block, *temp;
+ struct scatterlist *sg;
+ u64 total_src_len = 0;
+ u64 total_dst_len = 0;
+ u32 i;
+
+ ccdf = (struct fsl_qdma_ccdf *)fsl_comp->virt_addr;
+ csgf_desc = (struct fsl_qdma_csgf *)fsl_comp->virt_addr + 1;
+ csgf_src = (struct fsl_qdma_csgf *)fsl_comp->virt_addr + 2;
+ csgf_dest = (struct fsl_qdma_csgf *)fsl_comp->virt_addr + 3;
+ sdf = (struct fsl_qdma_sdf *)fsl_comp->virt_addr + 4;
+ ddf = (struct fsl_qdma_ddf *)fsl_comp->virt_addr + 5;
+ memset(fsl_comp->virt_addr, 0, FSL_QDMA_BASE_BUFFER_SIZE);
+ /* Head Command Descriptor(Frame Descriptor) */
+ qdma_ccdf_addr_set64(ccdf, fsl_comp->bus_addr + 16);
+ qdma_ccdf_set_format(ccdf, qdma_ccdf_get_offset(ccdf));
+ /* Status notification is enqueued to status queue. */
+ qdma_ccdf_set_ser(ccdf, qdma_ccdf_get_status(ccdf));
+
+ /* Compound Command Descriptor(Frame List Table) */
+ qdma_csgf_addr_set64(csgf_desc, fsl_comp->bus_addr + 64);
+ /* It must be 32 as Compound S/G Descriptor */
+ qdma_csgf_set_len(csgf_desc, 32);
+
+ sg_block = fsl_comp->sg_block;
+ qdma_csgf_addr_set64(csgf_src, sg_block->bus_addr);
+ /* This entry link to the s/g entry. */
+ qdma_csgf_set_e(csgf_src, 32);
+
+ temp = sg_block + fsl_comp->sg_block_src;
+ qdma_csgf_addr_set64(csgf_dest, temp->bus_addr);
+ /* This entry is the last entry. */
+ qdma_csgf_set_f(csgf_dest, 32);
+ /* This entry link to the s/g entry. */
+ qdma_csgf_set_e(csgf_dest, 32);
+
+ 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);
+ qdma_csgf_addr_set64(csgf_sg, sg_dma_address(sg));
+ qdma_csgf_set_len(csgf_sg, sg_dma_len(sg));
+ total_src_len += sg_dma_len(sg);
+
+ if (i == src_nents - 1)
+ qdma_csgf_set_f(csgf_sg, sg_dma_len(sg));
+ 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;
+ qdma_csgf_addr_set64(csgf_sg, temp->bus_addr);
+ qdma_csgf_set_e(csgf_sg, sg_dma_len(sg));
+ }
+ }
+
+ 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);
+ qdma_csgf_addr_set64(csgf_sg, sg_dma_address(sg));
+ qdma_csgf_set_len(csgf_sg, sg_dma_len(sg));
+ total_dst_len += sg_dma_len(sg);
+
+ if (i == dst_nents - 1)
+ qdma_csgf_set_f(csgf_sg, sg_dma_len(sg));
+ 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;
+ qdma_csgf_addr_set64(csgf_sg, temp->bus_addr);
+ qdma_csgf_set_e(csgf_sg, sg_dma_len(sg));
+ }
+ }
+
+ 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");
+
+ qdma_csgf_set_len(csgf_src, total_src_len);
+ qdma_csgf_set_len(csgf_dest, total_dst_len);
+
+ /* Descriptor Buffer */
+}
+
+/*
+ * Prei-request full command descriptor for enqueue.
+ */
+static int fsl_qdma_pre_request_enqueue_desc(struct fsl_qdma_queue *queue)
+{
+ struct fsl_qdma_comp *comp_temp;
+ int i;
+
+ for (i = 0; i < queue->n_cq; i++) {
+ comp_temp = kzalloc(sizeof(*comp_temp), GFP_KERNEL);
+ if (!comp_temp)
+ return -1;
+ comp_temp->virt_addr = dma_pool_alloc(queue->comp_pool,
+ GFP_NOWAIT,
+ &comp_temp->bus_addr);
+ if (!comp_temp->virt_addr)
+ return -1;
+ list_add_tail(&comp_temp->list, &queue->comp_free);
+ }
+ return 0;
+}
+
+/*
+ * 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,
+ unsigned int queue_num)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct fsl_qdma_queue *queue_head, *queue_temp;
+ int ret, len, i;
+ unsigned int queue_size[FSL_QDMA_QUEUE_MAX];
+
+ if (queue_num > FSL_QDMA_QUEUE_MAX)
+ queue_num = FSL_QDMA_QUEUE_MAX;
+ len = sizeof(*queue_head) * queue_num;
+ queue_head = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
+ if (!queue_head)
+ return NULL;
+
+ ret = of_property_read_u32_array(np, "queue-sizes", queue_size,
+ queue_num);
+ if (ret) {
+ dev_err(&pdev->dev, "Can't get queue-sizes.\n");
+ return NULL;
+ }
+
+ for (i = 0; i < queue_num; i++) {
+ if (queue_size[i] > FSL_QDMA_CIRCULAR_DESC_SIZE_MAX
+ || queue_size[i] < FSL_QDMA_CIRCULAR_DESC_SIZE_MIN) {
+ dev_err(&pdev->dev, "Get wrong queue-sizes.\n");
+ return NULL;
+ }
+ queue_temp = queue_head + i;
+ queue_temp->cq = dma_alloc_coherent(&pdev->dev,
+ sizeof(struct fsl_qdma_ccdf) *
+ queue_size[i],
+ &queue_temp->bus_addr,
+ GFP_KERNEL);
+ if (!queue_temp->cq)
+ return NULL;
+ queue_temp->n_cq = queue_size[i];
+ queue_temp->id = i;
+ queue_temp->virt_head = queue_temp->cq;
+ queue_temp->virt_tail = queue_temp->cq;
+ /*
+ * 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) *
+ queue_size[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) *
+ queue_size[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 struct fsl_qdma_queue *fsl_qdma_prep_status_queue(
+ struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct fsl_qdma_queue *status_head;
+ unsigned int status_size;
+ int ret;
+
+ ret = of_property_read_u32(np, "status-sizes", &status_size);
+ if (ret) {
+ dev_err(&pdev->dev, "Can't get status-sizes.\n");
+ return NULL;
+ }
+ if (status_size > FSL_QDMA_CIRCULAR_DESC_SIZE_MAX
+ || status_size < FSL_QDMA_CIRCULAR_DESC_SIZE_MIN) {
+ dev_err(&pdev->dev, "Get wrong status_size.\n");
+ return NULL;
+ }
+ status_head = devm_kzalloc(&pdev->dev, sizeof(*status_head),
+ GFP_KERNEL);
+ if (!status_head)
+ return NULL;
+
+ /*
+ * Buffer for queue command
+ */
+ status_head->cq = dma_alloc_coherent(&pdev->dev,
+ sizeof(struct fsl_qdma_ccdf) *
+ status_size,
+ &status_head->bus_addr,
+ GFP_KERNEL);
+ if (!status_head->cq)
+ return NULL;
+ status_head->n_cq = status_size;
+ status_head->virt_head = status_head->cq;
+ status_head->virt_tail = status_head->cq;
+ status_head->comp_pool = NULL;
+
+ return status_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_QUEUE_NUM_MAX; 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 int fsl_qdma_queue_transfer_complete(struct fsl_qdma_engine *fsl_qdma)
+{
+ 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;
+ struct fsl_qdma_csgf *csgf_src;
+ void __iomem *block = fsl_qdma->block_base;
+ u32 reg, i;
+ bool duplicate, duplicate_handle;
+
+ while (1) {
+ duplicate = 0;
+ duplicate_handle = 0;
+ reg = qdma_readl(fsl_qdma, block + FSL_QDMA_BSQSR);
+ if (reg & FSL_QDMA_BSQSR_QE)
+ return 0;
+ status_addr = fsl_status->virt_head;
+ if (qdma_ccdf_get_queue(status_addr) == pre_queue &&
+ qdma_ccdf_addr_get64(status_addr) == pre_addr)
+ duplicate = 1;
+ i = qdma_ccdf_get_queue(status_addr);
+ pre_queue = qdma_ccdf_get_queue(status_addr);
+ pre_addr = qdma_ccdf_addr_get64(status_addr);
+ temp_queue = fsl_queue + i;
+ spin_lock(&temp_queue->queue_lock);
+ if (list_empty(&temp_queue->comp_used)) {
+ if (duplicate)
+ duplicate_handle = 1;
+ else {
+ spin_unlock(&temp_queue->queue_lock);
+ return -1;
+ }
+ } else {
+ fsl_comp = list_first_entry(&temp_queue->comp_used,
+ struct fsl_qdma_comp,
+ list);
+ csgf_src = (struct fsl_qdma_csgf *)fsl_comp->virt_addr
+ + 2;
+ if (fsl_comp->bus_addr + 16 != pre_addr) {
+ if (duplicate)
+ duplicate_handle = 1;
+ else {
+ spin_unlock(&temp_queue->queue_lock);
+ return -1;
+ }
+ }
+ }
+
+ if (duplicate_handle) {
+ reg = qdma_readl(fsl_qdma, block + FSL_QDMA_BSQMR);
+ reg |= FSL_QDMA_BSQMR_DI;
+ qdma_ccdf_addr_set64(status_addr, 0x0);
+ fsl_status->virt_head++;
+ if (fsl_status->virt_head == fsl_status->cq
+ + fsl_status->n_cq)
+ fsl_status->virt_head = fsl_status->cq;
+ qdma_writel(fsl_qdma, reg, block + FSL_QDMA_BSQMR);
+ spin_unlock(&temp_queue->queue_lock);
+ continue;
+ }
+ list_del(&fsl_comp->list);
+
+ reg = qdma_readl(fsl_qdma, block + FSL_QDMA_BSQMR);
+ reg |= FSL_QDMA_BSQMR_DI;
+ qdma_ccdf_addr_set64(status_addr, 0x0);
+ fsl_status->virt_head++;
+ if (fsl_status->virt_head == fsl_status->cq + fsl_status->n_cq)
+ fsl_status->virt_head = fsl_status->cq;
+ qdma_writel(fsl_qdma, reg, block + FSL_QDMA_BSQMR);
+ spin_unlock(&temp_queue->queue_lock);
+
+ spin_lock(&fsl_comp->qchan->vchan.lock);
+ vchan_cookie_complete(&fsl_comp->vdesc);
+ fsl_comp->qchan->status = DMA_COMPLETE;
+ spin_unlock(&fsl_comp->qchan->vchan.lock);
+ }
+ return 0;
+}
+
+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 *status = fsl_qdma->status_base;
+
+ intr = qdma_readl(fsl_qdma, status + FSL_QDMA_DEDR);
+
+ if (intr)
+ dev_err(fsl_qdma->dma_dev.dev, "DMA transaction error!\n");
+
+ qdma_writel(fsl_qdma, 0xffffffff, status + 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, reg;
+ void __iomem *block = fsl_qdma->block_base;
+ void __iomem *ctrl = fsl_qdma->ctrl_base;
+
+ intr = qdma_readl(fsl_qdma, block + FSL_QDMA_BCQIDR(0));
+
+ if ((intr & FSL_QDMA_CQIDR_SQT) != 0)
+ intr = fsl_qdma_queue_transfer_complete(fsl_qdma);
+
+ if (intr != 0) {
+ reg = qdma_readl(fsl_qdma, ctrl + FSL_QDMA_DMR);
+ reg |= FSL_QDMA_DMR_DQD;
+ qdma_writel(fsl_qdma, reg, ctrl + FSL_QDMA_DMR);
+ qdma_writel(fsl_qdma, 0, block + FSL_QDMA_BCQIER(0));
+ dev_err(fsl_qdma->dma_dev.dev, "QDMA: status err!\n");
+ }
+
+ qdma_writel(fsl_qdma, 0xffffffff, block + FSL_QDMA_BCQIDR(0));
+
+ return IRQ_HANDLED;
+}
+
+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 *status = fsl_qdma->status_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));
+ }
+
+ /*
+ * Workaround for erratum: ERR010812.
+ * We must enable XOFF to avoid the enqueue rejection occurs.
+ * Setting SQCCMR ENTER_WM to 0x20.
+ */
+ qdma_writel(fsl_qdma, FSL_QDMA_SQCCMR_ENTER_WM,
+ block + FSL_QDMA_SQCCMR);
+ /*
+ * 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(5)
+ | 0x8000,
+ 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, status + FSL_QDMA_DEDR);
+ qdma_writel(fsl_qdma, 0xffffffff, status + 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 | FSL_QDMA_BCQSR_XOFF))
+ 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);
+ barrier();
+ 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;
+ unsigned int len, chans, queues;
+ int ret, i;
+
+ ret = of_property_read_u32(np, "channels", &chans);
+ if (ret) {
+ dev_err(&pdev->dev, "Can't get channels.\n");
+ return ret;
+ }
+
+ len = sizeof(*fsl_qdma) + sizeof(*fsl_chan) * chans;
+ fsl_qdma = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
+ if (!fsl_qdma)
+ return -ENOMEM;
+
+ ret = of_property_read_u32(np, "queues", &queues);
+ if (ret) {
+ dev_err(&pdev->dev, "Can't get queues.\n");
+ return ret;
+ }
+
+ fsl_qdma->queue = fsl_qdma_alloc_queue_resources(pdev, queues);
+ if (!fsl_qdma->queue)
+ return -ENOMEM;
+
+ fsl_qdma->status = fsl_qdma_prep_status_queue(pdev);
+ if (!fsl_qdma->status)
+ return -ENOMEM;
+
+ fsl_qdma->n_chans = chans;
+ fsl_qdma->n_queues = queues;
+ 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->status_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(fsl_qdma->status_base))
+ return PTR_ERR(fsl_qdma->status_base);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
+ 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 + i % fsl_qdma->n_queues;
+ fsl_chan->vchan.desc_free = fsl_qdma_free_desc;
+ INIT_LIST_HEAD(&fsl_chan->qcomp);
+ vchan_init(&fsl_chan->vchan, &fsl_qdma->dma_dev);
+ }
+ for (i = 0; i < fsl_qdma->n_queues; i++)
+ fsl_qdma_pre_request_enqueue_desc(fsl_qdma->queue + i);
+
+ 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_alloc_chan_resources
+ = fsl_qdma_alloc_chan_resources;
+ 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 Freescale 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_ALIAS("platform:fsl-qdma");
+MODULE_DESCRIPTION("Freescale qDMA engine driver");
+MODULE_LICENSE("GPL v2");
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