From 515d590e3d5313110faa4f2c86f7784d9b070fa9 Mon Sep 17 00:00:00 2001 From: Yangbo Lu 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 Signed-off-by: Yangbo Lu --- 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 +#include +#include +#include +#include +#include + +#include +#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 + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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 +#include +#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_' 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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");