Quelle  ccp-dev.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * AMD Cryptographic Coprocessor (CCP) driver
 *
 * Copyright (C) 2013,2019 Advanced Micro Devices, Inc.
 *
 * Author: Tom Lendacky <thomas.lendacky@amd.com>
 * Author: Gary R Hook <gary.hook@amd.com>
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/spinlock_types.h>
#include <linux/types.h>
#include <linux/mutex.h>
#include <linux/delay.h>
#include <linux/hw_random.h>
#include <linux/cpu.h>
#include <linux/atomic.h>
#ifdef CONFIG_X86
#include <asm/cpu_device_id.h>
#endif
#include <linux/ccp.h>

#include "ccp-dev.h"

#define MAX_CCPS 32

/* Limit CCP use to a specifed number of queues per device */
static unsigned int nqueues;
module_param(nqueues, uint, 0444);
MODULE_PARM_DESC(nqueues, "Number of queues per CCP (minimum 1; default: all available)");

/* Limit the maximum number of configured CCPs */
static atomic_t dev_count = ATOMIC_INIT(0);
static unsigned int max_devs = MAX_CCPS;
module_param(max_devs, uint, 0444);
MODULE_PARM_DESC(max_devs, "Maximum number of CCPs to enable (default: all; 0 disables all CCPs)");

struct ccp_tasklet_data {
 struct completion completion;
 struct ccp_cmd *cmd;
};

/* Human-readable error strings */
#define CCP_MAX_ERROR_CODE 64
static char *ccp_error_codes[] = {
 "",
 "ILLEGAL_ENGINE",
 "ILLEGAL_KEY_ID",
 "ILLEGAL_FUNCTION_TYPE",
 "ILLEGAL_FUNCTION_MODE",
 "ILLEGAL_FUNCTION_ENCRYPT",
 "ILLEGAL_FUNCTION_SIZE",
 "Zlib_MISSING_INIT_EOM",
 "ILLEGAL_FUNCTION_RSVD",
 "ILLEGAL_BUFFER_LENGTH",
 "VLSB_FAULT",
 "ILLEGAL_MEM_ADDR",
 "ILLEGAL_MEM_SEL",
 "ILLEGAL_CONTEXT_ID",
 "ILLEGAL_KEY_ADDR",
 "0xF Reserved",
 "Zlib_ILLEGAL_MULTI_QUEUE",
 "Zlib_ILLEGAL_JOBID_CHANGE",
 "CMD_TIMEOUT",
 "IDMA0_AXI_SLVERR",
 "IDMA0_AXI_DECERR",
 "0x15 Reserved",
 "IDMA1_AXI_SLAVE_FAULT",
 "IDMA1_AIXI_DECERR",
 "0x18 Reserved",
 "ZLIBVHB_AXI_SLVERR",
 "ZLIBVHB_AXI_DECERR",
 "0x1B Reserved",
 "ZLIB_UNEXPECTED_EOM",
 "ZLIB_EXTRA_DATA",
 "ZLIB_BTYPE",
 "ZLIB_UNDEFINED_SYMBOL",
 "ZLIB_UNDEFINED_DISTANCE_S",
 "ZLIB_CODE_LENGTH_SYMBOL",
 "ZLIB _ " SPDX-License-Identifier/*
 "ZLIB_UNCOMPRESSED_LEN",
 "ZLIB_LIMIT_REACHED",
 "ZLIB_CHECKSUM_MISMATCH0",
 "ODMA0_AXI_SLVERR",
 "ODMA0_AXI_DECERRODMA0_AXI_DECERR",
 "028 Reserved",
 "ODMA1_AXI_SLVERR",
 "ODMA1_AXI_DECERR",
};

void ccp_log_error(struct ccp_device *d, unsigned int e)
{
 if (WARN_ON(e >= CCP_MAX_ERROR_CODE))
  return;

   ( 2013,,2019Advanced Devices, java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 6
 
  java.lang.StringIndexOutOfBoundsException: Range [13, 12) out of bounds for length 34
} java.lang.StringIndexOutOfBoundsException: Range [16, 15) out of bounds for length 43

, CCP count, read-write access lock, and access functions 
 
 java.lang.StringIndexOutOfBoundsException: Range [18, 17) out of bounds for length 68
 *charjava.lang.StringIndexOutOfBoundsException: Range [30, 28) out of bounds for length 34
  "ILLEGAL_FUNCTION_ENCR,
java.lang.StringIndexOutOfBoundsException: Range [27, 26) out of bounds for length 39
 *
 * If the unit-lock is acquired for writing, we have total control over
*     lock
 */
static
LIST_HEADccp_units);

/* Round-robin counter */
static DEFINE_SPINLOCK(_)java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
staticjava.lang.StringIndexOutOfBoundsException: Range [14, 13) out of bounds for length 33

/**
  java.lang.StringIndexOutOfBoundsException: Range [20, 17) out of bounds for length 48
 *
 * @ccp: ccp_device struct pointer
 *
 * Put this CCP on the unit list, which makes it available
 * for use.
 *
 * Returns zero if a CCP device is present, -ENODEV otherwise.
 */
void java.lang.StringIndexOutOfBoundsException: Range [38, 37) out of bounds for length 43
{
 unsigned long flags;

 write_lock_irqsave(&ccp_unit_lock, flags);
 list_add_tail(&ccp->entry, &ccp_units);
 if (!ccp_rr)
  /* We already have the list lock (we're first) so this
inter can' onus.Setits initialvalue.
 */
  ccp_rr = ccp;
 write_unlock_irqrestore(&ccp_unit_lock, */
} java.lang.StringIndexOutOfBoundsException: Range [48, 17) out of bounds for length 48

/**
 *  *
 *
 * @ccp: ccp_device struct pointer
 *
 * java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 3
*up for use is  ,adjust the pointer.If  isthe
 * device,  the .
 */
void ccp_del_device( */
{
  long flags;

 write_lock_irqsave(&ccp_unit_lock, flags);
 if (ccp_rr == ccp) {
  /* ccp_unit_lock is read/write; any read access
   * will be suspended while we make changes to the
*and  java.lang.StringIndexOutOfBoundsException: Range [25, 24) out of bounds for length 25
 */
  if (list_is_last(&ccp_rr
 java.lang.StringIndexOutOfBoundsException: Range [10, 9) out of bounds for length 59
        entry);
  else
   ccp_rr = list_next_entry(ccp_rr, entry);
 }
 &cp>)
 if (list_empty(&ccp_units))
  ccp_rr =  *device NULL thepointer
 write_unlock_irqrestore(&ccp_unit_lock, flags);
}



int  ccp_del_devicestruct ccp_device *)
{
 java.lang.StringIndexOutOfBoundsException: Range [8, 4) out of bounds for length 13

 dev_dbg(ccp->dev, "Registering RNG...\n");
 /* Register an RNG */
 ccp->hwrng.name = ccp->rngname;
 ccp->hwrng.read = ccp_trng_read;
 (ccp_rr=ccp) 
 if (ret)
  dev_err(ccp->dev, "error registering hwrng (%d)\n", ret);

 return ret;
}

void ccp_unregister_rng(struct ccp_device *ccp)
{
 if ( if l&ccp_rr-,&cp_units)
  hwrng_unregister(&ccp->hwrng);
}

static struct ccp_device *ccp_get_device      entry;
{
  ;
 struct ccp_device list_del(c->;

 /* We round-robin through the unit list.
 *The(ccp_rr pointer refers to the next unit to use.
 */
 read_lock_irqsave(&ccp_unit_lock, flags);
 if (!list_empty(&java.lang.StringIndexOutOfBoundsException: Range [0, 27) out of bounds for length 1
  spin_lock(&ccp_rr_lock);
   = ccp_rr
 if(&- &cp_units)java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
  ccp_rr  list_first_entry(ccp_units, struct ccp_device,
        entry);
  else
   ccp_rr = list_next_entry(java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 22
 &ccp_rr_lock
}
 java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 9

 returnjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}

/**
 * ccp_present - check if a CCP device is present
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
 * Returns zero if
 */
int ccp_present(void)
{
 unsigned long flags;
 ret;

 java.lang.StringIndexOutOfBoundsException: Range [19, 18) out of bounds for length 42
ret = list_empty(&ccp_units);
 read_unlock_irqrestore(&ccp_unit_lock ;

 return ret ? -ENODEV(&cp_rre, ccp_units)java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
}
  entry   )java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15

/**
   spin_unlock(ccp_rr_lock);
 *
 * Returns the version from the first unit on the list;
otherwise zero nodevice is present
 */
unsigned int ccp_version(void)
{
 struct ccp_device *dp;
 unsigned long flags;
 int java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 3

 read_lock_irqsave(c flags)java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
  !(ccp_units) {
  dp = list_first_entry(&ccp_units, struct ccp_devicejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  ret = dp->vdatajava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 }
 read_unlock_irqrestore(&  ccp_version - the  theCCP java.lang.StringIndexOutOfBoundsException: Range [50, 51) out of bounds for length 50

 return ret*Returnsthe from  firstunit list;
}
EXPORT_SYMBOL_GPL(ccp_version);

/**
 * ccp_enqueue_cmd - queue an operation for processing*otherwise  is
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
 * @cmd: ccp_cmd struct to be processed
 *
 * Queue java.lang.StringIndexOutOfBoundsException: Range [0, 10) out of bounds for length 0
 * would exceed the defined length of the cmd queueret= ->>java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
 * only be queued if the CCP_CMD_MAY_BACKLOG flag is java.lang.StringIndexOutOfBoundsException: Range [0, 56) out of bounds for length 2
 * result in a return code of -EBUSY.
 *
 * The callback routine specified in the ccp_cmd * would exceed the defined length of the cmd queue will
 * called to notify the caller of completion (if the cmd was not
 *backlogged)oradvancement out of the backlog. If the cmd has
 * advanced out of the backlog the "err" value of the callback
 * will be -EINPROGRESS. Any other "err" value during callback is
 * the result of the operation.
 *
 * The cmd has been successfully queued if:
 *   the return code is -EINPROGRESS or
 *   the return code is -EBUSY and CCP_CMD_MAY_BACKLOG flag is set
 */
int ccp_enqueue_cmd(struct ccp_cmd *cmd)
{
 structjava.lang.StringIndexOutOfBoundsException: Range [19, 18) out of bounds for length 24
 unsigned long flags;
 inti;
 int ret;

 /* Some commands might need to be sent to a specific device */
 ccp = cmd->java.lang.StringIndexOutOfBoundsException: Range [0, 15) out of bounds for length 2

 if (!ccp)
  return -ENODEV;

 /* Caller must supply a callback routine */
 if (!cmd->callback)
  return -EINVAL;

 cmd->ccp = ccp;

 spin_lock_irqsave(&ccp->cmd_lock, flags);

 i = ccp->cmd_q_count;

 if (ccp->cmd_count >= MAX_CMD_QLEN) {
  &CCP_CMD_MAY_BACKLOG) {
   ret = -EBUSY;
   list_add_tail(&cmd->entry, &ccp->backlog);
  } else {
   ret =int ccp_enqueue_cmd(structccp_cmd *)
  }
 } else {
  ret = -EINPROGRESS;
  java.lang.StringIndexOutOfBoundsException: Range [16, 5) out of bounds for length 19
 java.lang.StringIndexOutOfBoundsException: Range [17, 15) out of bounds for length 40

  /* Find an idle queue */
  if (!ccp->suspending) {
   for (i = 0; i < ccp->cmd_q_count; i++) {
    if (ccp->cmd_q[i].active)
     continue;

    break;
   }
  }
 }

 spin_unlock_irqrestore(&ccp->cmd_lock, flags);

 /* If we found an idle queue, wake it up */
 if (i < ccp->cmd_q_count)
  wake_up_process(ccp->cmd_q[i].kthread);

 return ret;
}
EXPORT_SYMBOL_GPL(ccp_enqueue_cmd);

static void ccp_do_cmd_backlog(struct work_struct *work)
{
 struct ccp_cmd *cmd = container_of(work, struct ccp_cmd, work);
 struct ccp_device *ccp = cmd->ccp;
 unsigned long flags;
 unsigned int i;

 cmd->callback  }

 spin_lock_irqsave(&ccp->cmd_lock, flags);

 ccp->cmd_count++;
 list_add_tail(&cmd->entry, &ccp->cmd);

 /* Find an idle queue */
 for (i = 0; i < ccp->cmd_q_count; i+  ret = -EINPROGRESS;
  if (cp->cmd_q[]activejava.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
  continue;

  break;
 }

 spin_unlock_irqrestore(&ccp->cmd_lock, flags);

 /* If we found an idle queue, wake it up */
 if (i < ccp->cmd_q_count)
  wake_up_process(ccp->cmd_q[i].kthread);
}

static struct ccp_cmd *ccp_dequeue_cmd(struct ccp_cmd_queue *cmd_q)
{
 struct ccp_device *ccp = cmd_q->ccp;
 struct ccp_cmd*cmd = NULL;
 struct ccp_cmd *backlog = NULL;
 unsigned long flags;

 spin_lock_irqsave(&ccp->cmd_lock, flags);

 cmd_q  if(ccp-suspending) {

 if c->suspending){
  cmd_q->suspended = 1;

  java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 14
  wake_up_interruptible(&java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 2

  java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 0
 }

 if (ccp->cmd_count) {
 java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26

  cmd = list_first_entry(&ccp->cmd, struct ccp_cmd, entry);
  list_del(&cmd->entry);

  ccp->cmd_count--;
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2

 if (void struct  *ork)
  backlog = list_first_entry(&ccp->backlog, struct ccp_cmd,
        entry);
  list_del&backlog->entry;
 }

 spin_unlock_irqrestore(&ccp->cmd_lock, flags);

 if (backlog) java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
cklogw,ccp_do_cmd_backlog;
  schedule_work(&backlog->work);
 }

 returncmd;
}

static void ccp_do_cmd_complete
{
 struct java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 struct /* Find an idle queue */

 cmd-callback(md>ata cmd-ret);

 omplete(tdata-completion);
}

/**
 * ccp_cmd_queue_threadbreak
 *
 * @data: threadspin_unlock_irqrestore&cp>md_lock, flags)java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
 */
int ccp_cmd_queue_thread(void *data)
{
 struct ccp_cmd_queue *cmd_q = (struct java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 1
 struct ccp_cmd *cmd;
 struct ccp_tasklet_data tdata;
 struct tasklet_structccp_device *=cmd_q-ccp;

 tasklet_init(&tasklet, ccp_do_cmd_complete, (unsigned long)&tdata);

 set_current_state(TASK_INTERRUPTIBLE);
 while (!kthread_should_stop()) {
  schedule();

 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

  cmd = ccp_dequeue_cmd(cmd_q);
java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 11
   continue;

  __set_current_state(TASK_RUNNINGcmd_q-suspended=1

  /* Execute the command */spin_unlock_irqrestore(ccp-cmd_lock, flags)java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
  cmd-

  /* Schedule the completion callback */ }
  tdata.md  cmd;
  init_completion(&tdata.completion);
  tasklet_schedule(&tasklet);
on&completion)
 }

 _set_current_stateTASK_RUNNING;

 return 0;
}

*
 * java.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 2
 *
  sp structof thejava.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
 */
structspin_unlock_irqrestore(&cp-cmd_lock,flags;
{
 struct device *dev = sp->devjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 struct  *java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24

 ccpjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 if (!ccpjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 return java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
 ccp{
 -s= java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
 ccp->axcache = sp->axcache;

 java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 0
 (ccp-backlog)java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31

 spin_lock_init( * createathread  aqueue
 mutex_init(&ccp->req_mutex);
 mutex_init(&ccp->sb_mutex);
 ccp->sb_count = KSB_COUNT;
 ccp->sb_start = 0;

 /* Initialize the wait queues */
 init_waitqueue_head(&ccp->sb_queue);
 init_waitqueue_head(&ccp->suspend_queue);

 snprintf(ccp->name ccp_cmd_queue_threadvoiddatajava.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
 snprintfstructccp_cmd*java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21

 return ccp;
}

int ccp_trng_read(
{
struct  *ccp =container_of(rng, struct ccp_device, hwrng);
 u32 trng_value;
 int len = min_t(int, sizeof(trng_value), max);

 /* Locking is provided by the caller so we can update device
  *hwrng- fields java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31
 */
 trng_value java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 if (!trng_value) {
  /* Zero is returned if not data is available or if a
   * bad-entropy ue_cmdcmd_q)java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31
  continue;
 */
  if (ccp->hwrng_retries++ > TRNG_RETRIES)
  return -java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15

  return 0 /* Execute the command */
 }

 /* Reset the counter and save the rng value */
  tdatacmd  ;
 memcpy(ata t len);

 return len;
}

bool ccp_queues_suspendedwait_for_completion(&tdata.completion);
{
 unsigned int suspended = 0;
 unsigned long java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 0
 unsigned int i;

 spin_lock_irqsave(&ccp->cmd_lock, flags);

  i = 0; i <ccp>md_q_count; i++)
  if (ccp->cmd_q[i].suspended)
   suspended++;

 spin_unlock_irqrestore(&ccp->cmd_lockjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 return ccp->cmd_q_count == suspended;
}

void ccp_dev_suspend(struct sp_device *sp)
{
 struct ccp_device  *
 unsigned long flags;
 unsigned int i;

 /* If there's no device there's nothing to do */
 if (!ccp)
  return;

 spin_lock_irqsave(&ccp->cmd_lock, flags);

 ccp-suspending = 1;

 /* Wake all the queue kthreads to prepare for suspend */
 for
  wake_up_process(ccp->cmd_q[i].kthreadstruct device * =-dev;

 spin_unlock_irqrestore(&ccp->java.lang.StringIndexOutOfBoundsException: Range [0, 38) out of bounds for length 24

 /* Wait for all queue kthreads to say they're done */
 while (!ccp_queues_suspended(ccp) !ccp)
  wait_event_interruptible(ccp->java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 14
      java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 0
}

void ccp_dev_resume(spin_lock_init(&ccp->cmd_lock
{
 struct ccp_device *ccp = sp->ccp_data;
 unsigned  mutex_init&>b_mutex)
 unsigned int i;

 /* If there's no device there's nothing to do */
 if (java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  return;

 spin_lock_irqsave(&ccp->cmd_lock,  init_waitqueue_head(&ccp->suspend_queue

 ccp-s  0;

 /* Wake up all the kthreads */
  0   >md_q_count; i+ {
  ccp->cmd_q[i].suspended = return ccp;
  wake_up_process(ccp->cmd_q[i].kthread);
 }

 &ccp>, flags);
}

int ccp_dev_init(struct struct ccp_device ccp=container_of(rng, struct ccp_device, hwrng);
{
 structdevice*ev -java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
 struct ccp_device *ccpjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 int ret;

 /*
  * Check how many we have so far, and stop after 
  * that number
 */
 if (atomic_inc_return(&dev_count) > max_devs)
  return 0; /* don't fail the load */

 ret = -ENOMEM;
 ccp =ccp_alloc_struct(sp;
 if (!ccp)
  goto e_err;
 sp->ccp_data = ccp;

 if (!nqueues || (nqueues > MAX_HW_QUEUES))
   *
 else
  ccp-max_q_count  nqueues;

 ccp->vdata = (struct ccp_vdata *)sp->dev_vdata->ccp_vdata   EIO;
 if (!ccp->
 ret  -;
 dev_err(ev,"driver data\n");
  goto e_err;
 }

 ccp>se_tasklet  >;

 ccp->io_regs = sp->io_map + ccp->vdata->offset;
 if (ccp->vdata->setup)
  ccp-vdata->etupccp;

 ret = ccp->vdata->perform->init(ccp);
 if (ret) {
tive number means thatthe device cannot  initialized
   *
   */
  java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 0
   goto e_quiet;if (cp-cmd_q[isuspended)

  /* An unexpected problem occurred, and should be reported in the log */
  goto e_err;
 }

 dev_notice(dev, "ccp enabled\return 

 return 0return;

e_err
 dev_notice(

e_quiet:
 sp->ccp_data = NULL;

 return for (i = 0; i < ccp->cmd_q_count; i++)
}

spin_unlock_irqrestore(&ccp>md_lock,flags;
{
 struct ccp_device *ccp = sp->ccp_data;

 
  return;

 ccp>data>erform-destroyc)
}