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-rw-r--r--target/linux/layerscape/patches-5.4/806-dma-0026-dma-caam-add-dma-memcpy-driver.patch538
1 files changed, 0 insertions, 538 deletions
diff --git a/target/linux/layerscape/patches-5.4/806-dma-0026-dma-caam-add-dma-memcpy-driver.patch b/target/linux/layerscape/patches-5.4/806-dma-0026-dma-caam-add-dma-memcpy-driver.patch
deleted file mode 100644
index be5ae1ad13..0000000000
--- a/target/linux/layerscape/patches-5.4/806-dma-0026-dma-caam-add-dma-memcpy-driver.patch
+++ /dev/null
@@ -1,538 +0,0 @@
-From 27aa9f97887f599267c345075e61979de785c770 Mon Sep 17 00:00:00 2001
-From: Peng Ma <peng.ma@nxp.com>
-Date: Thu, 11 Oct 2018 16:49:41 +0800
-Subject: [PATCH] dma: caam: add dma memcpy driver
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-This module introduces a memcpy DMA driver based on the DMA capabilities
-of the CAAM hardware block. CAAM DMA is a platform driver that is only
-probed if the device is defined in the device tree. The driver creates
-a DMA channel for each JR of the CAAM. This introduces a dependency on
-the JR driver. Therefore a defering mechanism was used to ensure that
-the CAAM DMA driver is probed only after the JR driver.
-
-Signed-off-by: Radu Alexe <radu.alexe@nxp.com>
-Signed-off-by: Tudor Ambarus <tudor-dan.ambarus@nxp.com>
-Signed-off-by: Rajiv Vishwakarma <rajiv.vishwakarma@nxp.com>
-Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
-[rebase]
-Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
----
- drivers/dma/Kconfig | 19 +-
- drivers/dma/Makefile | 1 +
- drivers/dma/caam_dma.c | 462 +++++++++++++++++++++++++++++++++++++++++++++++++
- 3 files changed, 481 insertions(+), 1 deletion(-)
- create mode 100644 drivers/dma/caam_dma.c
-
---- a/drivers/dma/Kconfig
-+++ b/drivers/dma/Kconfig
-@@ -132,6 +132,24 @@ config COH901318
- help
- Enable support for ST-Ericsson COH 901 318 DMA.
-
-+config CRYPTO_DEV_FSL_CAAM_DMA
-+ tristate "CAAM DMA engine support"
-+ depends on CRYPTO_DEV_FSL_CAAM_JR
-+ default n
-+ 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.
-+
- config DMA_BCM2835
- tristate "BCM2835 DMA engine support"
- depends on ARCH_BCM2835
-@@ -663,7 +681,6 @@ config ZX_DMA
- help
- Support the DMA engine for ZTE ZX family platform devices.
-
--
- # driver files
- source "drivers/dma/bestcomm/Kconfig"
-
---- a/drivers/dma/Makefile
-+++ b/drivers/dma/Makefile
-@@ -77,6 +77,7 @@ obj-$(CONFIG_XGENE_DMA) += xgene-dma.o
- obj-$(CONFIG_ZX_DMA) += zx_dma.o
- obj-$(CONFIG_ST_FDMA) += st_fdma.o
- obj-$(CONFIG_FSL_DPAA2_QDMA) += fsl-dpaa2-qdma/
-+obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_DMA) += caam_dma.o
-
- obj-y += mediatek/
- obj-y += qcom/
---- /dev/null
-+++ b/drivers/dma/caam_dma.c
-@@ -0,0 +1,462 @@
-+/*
-+ * caam support for SG DMA
-+ *
-+ * Copyright 2016 Freescale Semiconductor, Inc
-+ * Copyright 2017 NXP
-+ *
-+ * 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 names of the above-listed copyright holders nor the
-+ * names of any contributors may be used to endorse or promote products
-+ * derived from this software without specific prior written permission.
-+ *
-+ *
-+ * ALTERNATIVELY, this software may be distributed under the terms of the
-+ * GNU General Public License ("GPL") as published by the Free Software
-+ * Foundation, either version 2 of that License or (at your option) any
-+ * later version.
-+ *
-+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
-+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-+ * POSSIBILITY OF SUCH DAMAGE.
-+ */
-+
-+#include <linux/dma-mapping.h>
-+#include <linux/dmaengine.h>
-+#include <linux/module.h>
-+#include <linux/platform_device.h>
-+#include <linux/slab.h>
-+
-+#include "dmaengine.h"
-+
-+#include "../crypto/caam/regs.h"
-+#include "../crypto/caam/jr.h"
-+#include "../crypto/caam/error.h"
-+#include "../crypto/caam/desc_constr.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;
-+ 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
-+ * @pending_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 pending_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->pending_q);
-+
-+ spin_unlock_bh(&ctx->edesc_lock);
-+
-+ return cookie;
-+}
-+
-+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_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);
-+
-+ print_hex_dump_debug("caam dma desc@" __stringify(__LINE__) ": ",
-+ DUMP_PREFIX_ADDRESS, 16, 4, jd, desc_bytes(jd), 1);
-+}
-+
-+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->pending_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->pending_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->pending_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);
-+
-+ print_hex_dump_debug("caam dma shdesc@" __stringify(__LINE__) ": ",
-+ DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc),
-+ 1);
-+}
-+
-+static int 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_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_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 struct platform_driver caam_dma_driver = {
-+ .driver = {
-+ .name = "caam-dma",
-+ },
-+ .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 DMA engine");
-+MODULE_AUTHOR("NXP Semiconductors");
-+MODULE_ALIAS("platform:caam-dma");
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 01:58:00 +0000