git.openwrt.org Git - openwrt/staging/pepe2k.git/blob

   1 From 20f552cafd7dda6f5d25128bbc04ea2c91d9f5d1 Mon Sep 17 00:00:00 2001
   2 From: Radu Alexe <radu.alexe@nxp.com>
   3 Date: Thu, 26 Oct 2017 10:45:14 +0300
   4 Subject: [PATCH] crypto: caam - add functionality used by the caam_dma driver
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 The caam_dma is a memcpy DMA driver based on the DMA functionality of
  10 the CAAM hardware block. It creates a DMA channel for each JR of the
  11 CAAM. This patch adds functionality that is used by the caam_dma that is
  12 not yet part of the JR driver.
  13
  14 Signed-off-by: Radu Alexe <radu.alexe@nxp.com>
  15 Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
  16 ---
  17  drivers/crypto/caam/desc.h |  2 ++
  18  drivers/crypto/caam/jr.c   | 41 +++++++++++++++++++++++++++++++++++++++++
  19  drivers/crypto/caam/jr.h   |  2 ++
  20  3 files changed, 45 insertions(+)
  21
  22 --- a/drivers/crypto/caam/desc.h
  23 +++ b/drivers/crypto/caam/desc.h
  24 @@ -364,6 +364,7 @@
  25  #define FIFOLD_TYPE_PK_N       (0x08 << FIFOLD_TYPE_SHIFT)
  26  #define FIFOLD_TYPE_PK_A       (0x0c << FIFOLD_TYPE_SHIFT)
  27  #define FIFOLD_TYPE_PK_B       (0x0d << FIFOLD_TYPE_SHIFT)
  28 +#define FIFOLD_TYPE_IFIFO      (0x0f << FIFOLD_TYPE_SHIFT)
  29
  30  /* Other types. Need to OR in last/flush bits as desired */
  31  #define FIFOLD_TYPE_MSG_MASK   (0x38 << FIFOLD_TYPE_SHIFT)
  32 @@ -1522,6 +1523,7 @@
  33  #define MATH_SRC1_INFIFO       (0x0a << MATH_SRC1_SHIFT)
  34  #define MATH_SRC1_OUTFIFO      (0x0b << MATH_SRC1_SHIFT)
  35  #define MATH_SRC1_ONE          (0x0c << MATH_SRC1_SHIFT)
  36 +#define MATH_SRC1_ZERO         (0x0f << MATH_SRC1_SHIFT)
  37
  38  /* Destination selectors */
  39  #define MATH_DEST_SHIFT                8
  40 --- a/drivers/crypto/caam/jr.c
  41 +++ b/drivers/crypto/caam/jr.c
  42 @@ -62,6 +62,14 @@ algs_unlock:
  43         mutex_unlock(&algs_lock);
  44  }
  45
  46 +static int jr_driver_probed;
  47 +
  48 +int caam_jr_driver_probed(void)
  49 +{
  50 +       return jr_driver_probed;
  51 +}
  52 +EXPORT_SYMBOL(caam_jr_driver_probed);
  53 +
  54  static int caam_reset_hw_jr(struct device *dev)
  55  {
  56         struct caam_drv_private_jr *jrp = dev_get_drvdata(dev);
  57 @@ -147,6 +155,8 @@ static int caam_jr_remove(struct platfor
  58         if (ret)
  59                 dev_err(jrdev, "Failed to shut down job ring\n");
  60
  61 +       jr_driver_probed--;
  62 +
  63         return ret;
  64  }
  65
  66 @@ -311,6 +321,36 @@ struct device *caam_jr_alloc(void)
  67  EXPORT_SYMBOL(caam_jr_alloc);
  68
  69  /**
  70 + * caam_jridx_alloc() - Alloc a specific job ring based on its index.
  71 + *
  72 + * returns :  pointer to the newly allocated physical
  73 + *           JobR dev can be written to if successful.
  74 + **/
  75 +struct device *caam_jridx_alloc(int idx)
  76 +{
  77 +       struct caam_drv_private_jr *jrpriv;
  78 +       struct device *dev = ERR_PTR(-ENODEV);
  79 +
  80 +       spin_lock(&driver_data.jr_alloc_lock);
  81 +
  82 +       if (list_empty(&driver_data.jr_list))
  83 +               goto end;
  84 +
  85 +       list_for_each_entry(jrpriv, &driver_data.jr_list, list_node) {
  86 +               if (jrpriv->ridx == idx) {
  87 +                       atomic_inc(&jrpriv->tfm_count);
  88 +                       dev = jrpriv->dev;
  89 +                       break;
  90 +               }
  91 +       }
  92 +
  93 +end:
  94 +       spin_unlock(&driver_data.jr_alloc_lock);
  95 +       return dev;
  96 +}
  97 +EXPORT_SYMBOL(caam_jridx_alloc);
  98 +
  99 +/**
 100   * caam_jr_free() - Free the Job Ring
 101   * @rdev     - points to the dev that identifies the Job ring to
 102   *             be released.
 103 @@ -565,6 +605,7 @@ static int caam_jr_probe(struct platform
 104         device_set_wakeup_enable(&pdev->dev, false);
 105
 106         register_algs(jrdev->parent);
 107 +       jr_driver_probed++;
 108
 109         return 0;
 110  }
 111 --- a/drivers/crypto/caam/jr.h
 112 +++ b/drivers/crypto/caam/jr.h
 113 @@ -9,7 +9,9 @@
 114  #define JR_H
 115
 116  /* Prototypes for backend-level services exposed to APIs */
 117 +int caam_jr_driver_probed(void);
 118  struct device *caam_jr_alloc(void);
 119 +struct device *caam_jridx_alloc(int idx);
 120  void caam_jr_free(struct device *rdev);
 121  int caam_jr_enqueue(struct device *dev, u32 *desc,
 122                     void (*cbk)(struct device *dev, u32 *desc, u32 status,