target/linux/layerscape/patches-5.4/804-crypto-0032-crypto-caam-add-CAAM-job-ring-UIO-support.patch

   1 From 8b60a441202cb5c6b5264dbee633fcb24414bab4 Mon Sep 17 00:00:00 2001
   2 From: Sandeep Malik <Sandeep.Malik@nxp.com>
   3 Date: Wed, 15 Nov 2017 17:16:13 +0530
   4 Subject: [PATCH] crypto: caam - add CAAM job ring UIO support
   5
   6 This patch add the support for job ring UIO so
   7 that userspace drivers can have access to the
   8 caam job rings
   9
  10 Signed-off-by: Sandeep Malik <Sandeep.Malik@nxp.com>
  11 Signed-off-by: Gagandeep Singh <g.singh@nxp.com>
  12 ---
  13  drivers/crypto/caam/Kconfig      |  11 ++
  14  drivers/crypto/caam/Makefile     |   1 +
  15  drivers/crypto/caam/fsl_jr_uio.c | 256 +++++++++++++++++++++++++++++++++++++++
  16  drivers/crypto/caam/fsl_jr_uio.h |  25 ++++
  17  4 files changed, 293 insertions(+)
  18  create mode 100644 drivers/crypto/caam/fsl_jr_uio.c
  19  create mode 100644 drivers/crypto/caam/fsl_jr_uio.h
  20
  21 --- a/drivers/crypto/caam/Kconfig
  22 +++ b/drivers/crypto/caam/Kconfig
  23 @@ -202,6 +202,17 @@ config CRYPTO_DEV_FSL_CAAM_SECVIO
  24            handler functions which can be specified to act on the consequences
  25            of a security violation.
  26
  27 +config CRYPTO_DEV_FSL_CAAM_JR_UIO
  28 +       tristate "Freescale Job Ring UIO support"
  29 +       depends on UIO
  30 +       default y
  31 +       help
  32 +         Selecting this will allow job ring UIO support for
  33 +         Userspace drivers
  34 +
  35 +         To compile this as a module, choose M here: the module
  36 +         will be called fsl_jr_uio.
  37 +
  38  endif # CRYPTO_DEV_FSL_CAAM_JR
  39
  40  endif # CRYPTO_DEV_FSL_CAAM
  41 --- a/drivers/crypto/caam/Makefile
  42 +++ b/drivers/crypto/caam/Makefile
  43 @@ -13,6 +13,7 @@ obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM) += caa
  44  obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_JR) += caam_jr.o
  45  obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API_DESC) += caamalg_desc.o
  46  obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_AHASH_API_DESC) += caamhash_desc.o
  47 +obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_JR_UIO) += fsl_jr_uio.o
  48
  49  caam-y := ctrl.o
  50  caam-$(CONFIG_CRYPTO_DEV_FSL_CAAM_TK_API) += tag_object.o
  51 --- /dev/null
  52 +++ b/drivers/crypto/caam/fsl_jr_uio.c
  53 @@ -0,0 +1,256 @@
  54 +// SPDX-License-Identifier: GPL-2.0
  55 +/*
  56 + * Copyright 2013 Freescale Semiconductor, Inc.
  57 + * Copyright 2018 NXP
  58 + */
  59 +
  60 +#include <linux/kernel.h>
  61 +#include <linux/module.h>
  62 +#include <linux/of_address.h>
  63 +#include <linux/of_irq.h>
  64 +#include <linux/of_platform.h>
  65 +#include <linux/io.h>
  66 +#include <linux/uio_driver.h>
  67 +#include <linux/slab.h>
  68 +#include <linux/list.h>
  69 +#include "regs.h"
  70 +#include "fsl_jr_uio.h"
  71 +
  72 +static const char jr_uio_version[] = "fsl JR UIO driver v1.0";
  73 +
  74 +#define NAME_LENGTH 30
  75 +#define JR_INDEX_OFFSET 12
  76 +
  77 +static const char uio_device_name[] = "fsl-jr";
  78 +static LIST_HEAD(jr_list);
  79 +
  80 +struct jr_uio_info {
  81 +       atomic_t ref; /* exclusive, only one open() at a time */
  82 +       struct uio_info uio;
  83 +       char name[NAME_LENGTH];
  84 +};
  85 +
  86 +struct jr_dev {
  87 +       u32 revision;
  88 +       u32 index;
  89 +       u32 irq;
  90 +       struct caam_job_ring __iomem *global_regs;
  91 +       struct device *dev;
  92 +       struct resource *res;
  93 +       struct jr_uio_info info;
  94 +       struct list_head node;
  95 +       struct list_head jr_list;
  96 +};
  97 +
  98 +static int jr_uio_open(struct uio_info *info, struct inode *inode)
  99 +{
 100 +       struct jr_uio_info *uio_info = container_of(info,
 101 +                                       struct jr_uio_info, uio);
 102 +
 103 +       if (!atomic_dec_and_test(&uio_info->ref)) {
 104 +               pr_err("%s: failing non-exclusive open()\n", uio_info->name);
 105 +               atomic_inc(&uio_info->ref);
 106 +               return -EBUSY;
 107 +       }
 108 +
 109 +       return 0;
 110 +}
 111 +
 112 +static int jr_uio_release(struct uio_info *info, struct inode *inode)
 113 +{
 114 +       struct jr_uio_info *uio_info = container_of(info,
 115 +                                       struct jr_uio_info, uio);
 116 +       atomic_inc(&uio_info->ref);
 117 +
 118 +       return 0;
 119 +}
 120 +
 121 +static irqreturn_t jr_uio_irq_handler(int irq, struct uio_info *dev_info)
 122 +{
 123 +       struct jr_dev *jrdev = dev_info->priv;
 124 +       u32 irqstate;
 125 +
 126 +       irqstate = rd_reg32(&jrdev->global_regs->jrintstatus);
 127 +
 128 +       if (!irqstate)
 129 +               return IRQ_NONE;
 130 +
 131 +       if (irqstate & JRINT_JR_ERROR)
 132 +               dev_info(jrdev->dev, "uio job ring error - irqstate: %08x\n",
 133 +                        irqstate);
 134 +
 135 +       /*mask valid interrupts */
 136 +       clrsetbits_32(&jrdev->global_regs->rconfig_lo, 0, JRCFG_IMSK);
 137 +
 138 +       /* Have valid interrupt at this point, just ACK and trigger */
 139 +       wr_reg32(&jrdev->global_regs->jrintstatus, irqstate);
 140 +
 141 +       return IRQ_HANDLED;
 142 +}
 143 +
 144 +static int jr_uio_irqcontrol(struct uio_info *dev_info, int irqon)
 145 +{
 146 +       struct jr_dev *jrdev = dev_info->priv;
 147 +
 148 +       switch (irqon) {
 149 +       case SEC_UIO_SIMULATE_IRQ_CMD:
 150 +               uio_event_notify(dev_info);
 151 +               break;
 152 +       case SEC_UIO_ENABLE_IRQ_CMD:
 153 +               /* Enable Job Ring interrupt */
 154 +               clrsetbits_32(&jrdev->global_regs->rconfig_lo, JRCFG_IMSK, 0);
 155 +               break;
 156 +       case SEC_UIO_DISABLE_IRQ_CMD:
 157 +               /* Disable Job Ring interrupt */
 158 +               clrsetbits_32(&jrdev->global_regs->rconfig_lo, 0, JRCFG_IMSK);
 159 +               break;
 160 +       default:
 161 +               break;
 162 +       }
 163 +       return 0;
 164 +}
 165 +
 166 +static int __init jr_uio_init(struct jr_dev *uio_dev)
 167 +{
 168 +       int ret;
 169 +       struct jr_uio_info *info;
 170 +
 171 +       info = &uio_dev->info;
 172 +       atomic_set(&info->ref, 1);
 173 +       info->uio.version = jr_uio_version;
 174 +       info->uio.name = uio_dev->info.name;
 175 +       info->uio.mem[0].name = "JR config space";
 176 +       info->uio.mem[0].addr = uio_dev->res->start;
 177 +       info->uio.mem[0].size = uio_dev->res->end - uio_dev->res->start + 1;
 178 +       info->uio.mem[0].internal_addr = uio_dev->global_regs;
 179 +       info->uio.mem[0].memtype = UIO_MEM_PHYS;
 180 +       info->uio.irq = uio_dev->irq;
 181 +       info->uio.irq_flags = IRQF_SHARED;
 182 +       info->uio.handler = jr_uio_irq_handler;
 183 +       info->uio.irqcontrol = jr_uio_irqcontrol;
 184 +       info->uio.open = jr_uio_open;
 185 +       info->uio.release = jr_uio_release;
 186 +       info->uio.priv = uio_dev;
 187 +
 188 +       ret = uio_register_device(uio_dev->dev, &info->uio);
 189 +       if (ret) {
 190 +               dev_err(uio_dev->dev, "jr_uio: UIO registration failed\n");
 191 +               return ret;
 192 +       }
 193 +
 194 +       return 0;
 195 +}
 196 +
 197 +static const struct of_device_id jr_ids[] = {
 198 +       { .compatible = "fsl,sec-v4.0-job-ring", },
 199 +       { .compatible = "fsl,sec-v4.4-job-ring", },
 200 +       { .compatible = "fsl,sec-v5.0-job-ring", },
 201 +       { .compatible = "fsl,sec-v6.0-job-ring", },
 202 +       {},
 203 +};
 204 +
 205 +static int fsl_jr_probe(struct platform_device *dev)
 206 +{
 207 +       struct resource regs;
 208 +       struct jr_dev *jr_dev;
 209 +       struct device_node *jr_node;
 210 +       int ret, count = 0;
 211 +       struct list_head *p;
 212 +
 213 +       jr_node = dev->dev.of_node;
 214 +       if (!jr_node) {
 215 +               dev_err(&dev->dev, "Device OF-Node is NULL\n");
 216 +               return -EFAULT;
 217 +       }
 218 +
 219 +       jr_dev = devm_kzalloc(&dev->dev, sizeof(*jr_dev), GFP_KERNEL);
 220 +       if (!jr_dev)
 221 +               return -ENOMEM;
 222 +
 223 +       /* Creat name and index */
 224 +       list_for_each(p, &jr_list) {
 225 +               count++;
 226 +       }
 227 +       jr_dev->index = count;
 228 +
 229 +       snprintf(jr_dev->info.name, sizeof(jr_dev->info.name) - 1,
 230 +                "%s%d", uio_device_name, jr_dev->index);
 231 +
 232 +       jr_dev->dev = &dev->dev;
 233 +       platform_set_drvdata(dev, jr_dev);
 234 +
 235 +       /* Get the resource from dtb node */
 236 +       ret = of_address_to_resource(jr_node, 0, &regs);
 237 +       if (unlikely(ret < 0)) {
 238 +               dev_err(&dev->dev, "OF-Address-to-resource Failed\n");
 239 +               ret = -EFAULT;
 240 +               goto abort;
 241 +       }
 242 +
 243 +       jr_dev->res = devm_request_mem_region(&dev->dev, regs.start,
 244 +                                             regs.end - regs.start + 1,
 245 +                                             jr_dev->info.name);
 246 +       if (unlikely(!jr_dev->res)) {
 247 +               dev_err(jr_dev->dev, "devm_request_mem_region failed\n");
 248 +               ret = -ENOMEM;
 249 +               goto abort;
 250 +       }
 251 +
 252 +       jr_dev->global_regs =
 253 +               devm_ioremap(&dev->dev, jr_dev->res->start,
 254 +                            jr_dev->res->end - jr_dev->res->start + 1);
 255 +       if (unlikely(jr_dev->global_regs == 0)) {
 256 +               dev_err(jr_dev->dev, "devm_ioremap failed\n");
 257 +               ret = -EIO;
 258 +               goto abort;
 259 +       }
 260 +       jr_dev->irq = irq_of_parse_and_map(jr_node, 0);
 261 +       dev_dbg(jr_dev->dev, "errirq: %d\n", jr_dev->irq);
 262 +
 263 +       /* Register UIO */
 264 +       ret = jr_uio_init(jr_dev);
 265 +       if (ret) {
 266 +               dev_err(&dev->dev, "UIO init Failed\n");
 267 +               goto abort;
 268 +       }
 269 +
 270 +       list_add_tail(&jr_dev->node, &jr_list);
 271 +
 272 +       dev_info(jr_dev->dev, "UIO device full name %s initialized\n",
 273 +                jr_dev->info.name);
 274 +
 275 +       return 0;
 276 +
 277 +abort:
 278 +       return ret;
 279 +}
 280 +
 281 +static int fsl_jr_remove(struct platform_device *dev)
 282 +{
 283 +       struct jr_dev *jr_dev = platform_get_drvdata(dev);
 284 +
 285 +       if (!jr_dev)
 286 +               return 0;
 287 +
 288 +       list_del(&jr_dev->node);
 289 +       uio_unregister_device(&jr_dev->info.uio);
 290 +
 291 +       return 0;
 292 +}
 293 +
 294 +MODULE_DEVICE_TABLE(of, jr_ids);
 295 +
 296 +static struct platform_driver fsl_jr_driver = {
 297 +       .driver = {
 298 +               .name = "fsl-jr-uio",
 299 +               .of_match_table = jr_ids,
 300 +       },
 301 +       .probe = fsl_jr_probe,
 302 +       .remove = fsl_jr_remove,
 303 +};
 304 +
 305 +module_platform_driver(fsl_jr_driver);
 306 +
 307 +MODULE_LICENSE("GPL");
 308 +MODULE_AUTHOR("NXP");
 309 +MODULE_DESCRIPTION("FSL SEC UIO Driver");
 310 --- /dev/null
 311 +++ b/drivers/crypto/caam/fsl_jr_uio.h
 312 @@ -0,0 +1,25 @@
 313 +/* SPDX-License-Identifier: GPL-2.0 */
 314 +/*
 315 + * CAAM Job RING UIO support header file
 316 + *
 317 + * Copyright 2013 Freescale Semiconductor, Inc
 318 + * Copyright 2018 NXP
 319 + */
 320 +
 321 +#ifndef FSL_JR_UIO_H
 322 +#define FSL_JR_UIO_H
 323 +
 324 +/** UIO command used by user-space driver to request
 325 + *  disabling IRQs on a certain job ring
 326 + */
 327 +#define SEC_UIO_DISABLE_IRQ_CMD         0
 328 +/** UIO command used by user-space driver to request
 329 + *  enabling IRQs on a certain job ring
 330 + */
 331 +#define SEC_UIO_ENABLE_IRQ_CMD          1
 332 +/** UIO command used by user-space driver to request SEC kernel driver
 333 + *  to simulate that an IRQ is generated on a certain job ring
 334 + */
 335 +#define SEC_UIO_SIMULATE_IRQ_CMD        2
 336 +
 337 +#endif