2011-03-13 01:54:26 -07:00
|
|
|
/*
|
|
|
|
* CAAM control-plane driver backend
|
|
|
|
* Controller-level driver, kernel property detection, initialization
|
|
|
|
*
|
2012-06-22 18:48:52 -06:00
|
|
|
* Copyright 2008-2012 Freescale Semiconductor, Inc.
|
2011-03-13 01:54:26 -07:00
|
|
|
*/
|
|
|
|
|
crypto: caam - Introduce the use of the managed version of kzalloc
This patch moves data allocated using kzalloc to managed data allocated
using devm_kzalloc and cleans now unnecessary kfrees in probe and remove
functions. Also, linux/device.h is added to make sure the devm_*()
routine declarations are unambiguously available. Earlier, in the probe
function ctrlpriv was leaked on the failure of ctrl = of_iomap(nprop, 0);
as well as on the failure of ctrlpriv->jrpdev = kzalloc(...); . These
two bugs have been fixed by the patch.
The following Coccinelle semantic patch was used for making the change:
identifier p, probefn, removefn;
@@
struct platform_driver p = {
.probe = probefn,
.remove = removefn,
};
@prb@
identifier platform.probefn, pdev;
expression e, e1, e2;
@@
probefn(struct platform_device *pdev, ...) {
<+...
- e = kzalloc(e1, e2)
+ e = devm_kzalloc(&pdev->dev, e1, e2)
...
?-kfree(e);
...+>
}
@rem depends on prb@
identifier platform.removefn;
expression e;
@@
removefn(...) {
<...
- kfree(e);
...>
}
Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Reviewed-by: Marek Vasut <marex@denx.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-05-27 12:25:48 -06:00
|
|
|
#include <linux/device.h>
|
2013-09-17 13:28:33 -06:00
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|
|
#include <linux/of_address.h>
|
|
|
|
#include <linux/of_irq.h>
|
|
|
|
|
2011-03-13 01:54:26 -07:00
|
|
|
#include "compat.h"
|
|
|
|
#include "regs.h"
|
|
|
|
#include "intern.h"
|
|
|
|
#include "jr.h"
|
2012-06-22 18:48:52 -06:00
|
|
|
#include "desc_constr.h"
|
|
|
|
#include "error.h"
|
2011-03-13 01:54:26 -07:00
|
|
|
|
2012-06-22 18:48:52 -06:00
|
|
|
/*
|
|
|
|
* Descriptor to instantiate RNG State Handle 0 in normal mode and
|
|
|
|
* load the JDKEK, TDKEK and TDSK registers
|
|
|
|
*/
|
2013-09-09 09:56:34 -06:00
|
|
|
static void build_instantiation_desc(u32 *desc, int handle, int do_sk)
|
2012-06-22 18:48:52 -06:00
|
|
|
{
|
2013-09-09 09:56:34 -06:00
|
|
|
u32 *jump_cmd, op_flags;
|
2012-06-22 18:48:52 -06:00
|
|
|
|
|
|
|
init_job_desc(desc, 0);
|
|
|
|
|
2013-09-09 09:56:34 -06:00
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|
op_flags = OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
|
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|
|
(handle << OP_ALG_AAI_SHIFT) | OP_ALG_AS_INIT;
|
|
|
|
|
2012-06-22 18:48:52 -06:00
|
|
|
/* INIT RNG in non-test mode */
|
2013-09-09 09:56:34 -06:00
|
|
|
append_operation(desc, op_flags);
|
2012-06-22 18:48:52 -06:00
|
|
|
|
2013-09-09 09:56:34 -06:00
|
|
|
if (!handle && do_sk) {
|
|
|
|
/*
|
|
|
|
* For SH0, Secure Keys must be generated as well
|
|
|
|
*/
|
2012-06-22 18:48:52 -06:00
|
|
|
|
2013-09-09 09:56:34 -06:00
|
|
|
/* wait for done */
|
|
|
|
jump_cmd = append_jump(desc, JUMP_CLASS_CLASS1);
|
|
|
|
set_jump_tgt_here(desc, jump_cmd);
|
2012-06-22 18:48:52 -06:00
|
|
|
|
2013-09-09 09:56:34 -06:00
|
|
|
/*
|
|
|
|
* load 1 to clear written reg:
|
|
|
|
* resets the done interrrupt and returns the RNG to idle.
|
|
|
|
*/
|
|
|
|
append_load_imm_u32(desc, 1, LDST_SRCDST_WORD_CLRW);
|
|
|
|
|
|
|
|
/* Initialize State Handle */
|
|
|
|
append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
|
|
|
|
OP_ALG_AAI_RNG4_SK);
|
|
|
|
}
|
2012-06-22 18:48:52 -06:00
|
|
|
|
2013-09-09 09:56:28 -06:00
|
|
|
append_jump(desc, JUMP_CLASS_CLASS1 | JUMP_TYPE_HALT);
|
2012-06-22 18:48:52 -06:00
|
|
|
}
|
|
|
|
|
2013-09-09 09:56:32 -06:00
|
|
|
/* Descriptor for deinstantiation of State Handle 0 of the RNG block. */
|
2013-09-09 09:56:34 -06:00
|
|
|
static void build_deinstantiation_desc(u32 *desc, int handle)
|
2013-09-09 09:56:32 -06:00
|
|
|
{
|
|
|
|
init_job_desc(desc, 0);
|
2012-06-22 18:48:52 -06:00
|
|
|
|
2013-09-09 09:56:32 -06:00
|
|
|
/* Uninstantiate State Handle 0 */
|
2012-06-22 18:48:52 -06:00
|
|
|
append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
|
2013-09-09 09:56:34 -06:00
|
|
|
(handle << OP_ALG_AAI_SHIFT) | OP_ALG_AS_INITFINAL);
|
2013-09-09 09:56:32 -06:00
|
|
|
|
|
|
|
append_jump(desc, JUMP_CLASS_CLASS1 | JUMP_TYPE_HALT);
|
2012-06-22 18:48:52 -06:00
|
|
|
}
|
|
|
|
|
2013-09-09 09:56:31 -06:00
|
|
|
/*
|
|
|
|
* run_descriptor_deco0 - runs a descriptor on DECO0, under direct control of
|
|
|
|
* the software (no JR/QI used).
|
|
|
|
* @ctrldev - pointer to device
|
2013-09-09 09:56:34 -06:00
|
|
|
* @status - descriptor status, after being run
|
|
|
|
*
|
2013-09-09 09:56:31 -06:00
|
|
|
* Return: - 0 if no error occurred
|
|
|
|
* - -ENODEV if the DECO couldn't be acquired
|
|
|
|
* - -EAGAIN if an error occurred while executing the descriptor
|
|
|
|
*/
|
2013-09-09 09:56:34 -06:00
|
|
|
static inline int run_descriptor_deco0(struct device *ctrldev, u32 *desc,
|
|
|
|
u32 *status)
|
2012-06-22 18:48:52 -06:00
|
|
|
{
|
2013-07-03 23:56:03 -06:00
|
|
|
struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev);
|
|
|
|
struct caam_full __iomem *topregs;
|
|
|
|
unsigned int timeout = 100000;
|
2013-09-09 09:56:31 -06:00
|
|
|
u32 deco_dbg_reg, flags;
|
2013-09-09 09:56:32 -06:00
|
|
|
int i;
|
2013-07-03 23:56:03 -06:00
|
|
|
|
|
|
|
/* Set the bit to request direct access to DECO0 */
|
|
|
|
topregs = (struct caam_full __iomem *)ctrlpriv->ctrl;
|
|
|
|
setbits32(&topregs->ctrl.deco_rq, DECORR_RQD0ENABLE);
|
|
|
|
|
|
|
|
while (!(rd_reg32(&topregs->ctrl.deco_rq) & DECORR_DEN0) &&
|
|
|
|
--timeout)
|
|
|
|
cpu_relax();
|
|
|
|
|
|
|
|
if (!timeout) {
|
|
|
|
dev_err(ctrldev, "failed to acquire DECO 0\n");
|
2013-09-09 09:56:31 -06:00
|
|
|
clrbits32(&topregs->ctrl.deco_rq, DECORR_RQD0ENABLE);
|
|
|
|
return -ENODEV;
|
2012-06-22 18:48:52 -06:00
|
|
|
}
|
|
|
|
|
2013-07-03 23:56:03 -06:00
|
|
|
for (i = 0; i < desc_len(desc); i++)
|
2013-09-09 09:56:31 -06:00
|
|
|
wr_reg32(&topregs->deco.descbuf[i], *(desc + i));
|
2012-06-22 18:48:52 -06:00
|
|
|
|
2013-09-09 09:56:31 -06:00
|
|
|
flags = DECO_JQCR_WHL;
|
|
|
|
/*
|
|
|
|
* If the descriptor length is longer than 4 words, then the
|
|
|
|
* FOUR bit in JRCTRL register must be set.
|
|
|
|
*/
|
|
|
|
if (desc_len(desc) >= 4)
|
|
|
|
flags |= DECO_JQCR_FOUR;
|
|
|
|
|
|
|
|
/* Instruct the DECO to execute it */
|
|
|
|
wr_reg32(&topregs->deco.jr_ctl_hi, flags);
|
2013-07-03 23:56:03 -06:00
|
|
|
|
|
|
|
timeout = 10000000;
|
2013-09-09 09:56:30 -06:00
|
|
|
do {
|
|
|
|
deco_dbg_reg = rd_reg32(&topregs->deco.desc_dbg);
|
|
|
|
/*
|
|
|
|
* If an error occured in the descriptor, then
|
|
|
|
* the DECO status field will be set to 0x0D
|
|
|
|
*/
|
|
|
|
if ((deco_dbg_reg & DESC_DBG_DECO_STAT_MASK) ==
|
|
|
|
DESC_DBG_DECO_STAT_HOST_ERR)
|
|
|
|
break;
|
2013-07-03 23:56:03 -06:00
|
|
|
cpu_relax();
|
2013-09-09 09:56:30 -06:00
|
|
|
} while ((deco_dbg_reg & DESC_DBG_DECO_STAT_VALID) && --timeout);
|
2012-06-22 18:48:52 -06:00
|
|
|
|
2013-09-09 09:56:34 -06:00
|
|
|
*status = rd_reg32(&topregs->deco.op_status_hi) &
|
|
|
|
DECO_OP_STATUS_HI_ERR_MASK;
|
2013-07-03 23:56:03 -06:00
|
|
|
|
2013-09-09 09:56:31 -06:00
|
|
|
/* Mark the DECO as free */
|
2013-07-03 23:56:03 -06:00
|
|
|
clrbits32(&topregs->ctrl.deco_rq, DECORR_RQD0ENABLE);
|
2013-09-09 09:56:31 -06:00
|
|
|
|
|
|
|
if (!timeout)
|
|
|
|
return -EAGAIN;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* instantiate_rng - builds and executes a descriptor on DECO0,
|
|
|
|
* which initializes the RNG block.
|
|
|
|
* @ctrldev - pointer to device
|
2013-09-09 09:56:34 -06:00
|
|
|
* @state_handle_mask - bitmask containing the instantiation status
|
|
|
|
* for the RNG4 state handles which exist in
|
|
|
|
* the RNG4 block: 1 if it's been instantiated
|
|
|
|
* by an external entry, 0 otherwise.
|
|
|
|
* @gen_sk - generate data to be loaded into the JDKEK, TDKEK and TDSK;
|
|
|
|
* Caution: this can be done only once; if the keys need to be
|
|
|
|
* regenerated, a POR is required
|
|
|
|
*
|
2013-09-09 09:56:31 -06:00
|
|
|
* Return: - 0 if no error occurred
|
|
|
|
* - -ENOMEM if there isn't enough memory to allocate the descriptor
|
|
|
|
* - -ENODEV if DECO0 couldn't be acquired
|
|
|
|
* - -EAGAIN if an error occurred when executing the descriptor
|
|
|
|
* f.i. there was a RNG hardware error due to not "good enough"
|
|
|
|
* entropy being aquired.
|
|
|
|
*/
|
2013-09-09 09:56:34 -06:00
|
|
|
static int instantiate_rng(struct device *ctrldev, int state_handle_mask,
|
|
|
|
int gen_sk)
|
2013-09-09 09:56:31 -06:00
|
|
|
{
|
2013-09-09 09:56:34 -06:00
|
|
|
struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev);
|
|
|
|
struct caam_full __iomem *topregs;
|
|
|
|
struct rng4tst __iomem *r4tst;
|
|
|
|
u32 *desc, status, rdsta_val;
|
|
|
|
int ret = 0, sh_idx;
|
|
|
|
|
|
|
|
topregs = (struct caam_full __iomem *)ctrlpriv->ctrl;
|
|
|
|
r4tst = &topregs->ctrl.r4tst[0];
|
2013-09-09 09:56:31 -06:00
|
|
|
|
|
|
|
desc = kmalloc(CAAM_CMD_SZ * 7, GFP_KERNEL);
|
|
|
|
if (!desc)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
2013-09-09 09:56:34 -06:00
|
|
|
for (sh_idx = 0; sh_idx < RNG4_MAX_HANDLES; sh_idx++) {
|
|
|
|
/*
|
|
|
|
* If the corresponding bit is set, this state handle
|
|
|
|
* was initialized by somebody else, so it's left alone.
|
|
|
|
*/
|
|
|
|
if ((1 << sh_idx) & state_handle_mask)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
/* Create the descriptor for instantiating RNG State Handle */
|
|
|
|
build_instantiation_desc(desc, sh_idx, gen_sk);
|
|
|
|
|
|
|
|
/* Try to run it through DECO0 */
|
|
|
|
ret = run_descriptor_deco0(ctrldev, desc, &status);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If ret is not 0, or descriptor status is not 0, then
|
|
|
|
* something went wrong. No need to try the next state
|
|
|
|
* handle (if available), bail out here.
|
|
|
|
* Also, if for some reason, the State Handle didn't get
|
|
|
|
* instantiated although the descriptor has finished
|
|
|
|
* without any error (HW optimizations for later
|
|
|
|
* CAAM eras), then try again.
|
|
|
|
*/
|
|
|
|
rdsta_val =
|
|
|
|
rd_reg32(&topregs->ctrl.r4tst[0].rdsta) & RDSTA_IFMASK;
|
|
|
|
if (status || !(rdsta_val & (1 << sh_idx)))
|
|
|
|
ret = -EAGAIN;
|
|
|
|
if (ret)
|
|
|
|
break;
|
|
|
|
|
|
|
|
dev_info(ctrldev, "Instantiated RNG4 SH%d\n", sh_idx);
|
|
|
|
/* Clear the contents before recreating the descriptor */
|
|
|
|
memset(desc, 0x00, CAAM_CMD_SZ * 7);
|
|
|
|
}
|
2013-09-09 09:56:31 -06:00
|
|
|
|
2013-07-03 23:56:03 -06:00
|
|
|
kfree(desc);
|
2013-09-09 09:56:31 -06:00
|
|
|
|
2012-06-22 18:48:52 -06:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2013-09-09 09:56:32 -06:00
|
|
|
* deinstantiate_rng - builds and executes a descriptor on DECO0,
|
|
|
|
* which deinitializes the RNG block.
|
|
|
|
* @ctrldev - pointer to device
|
2013-09-09 09:56:34 -06:00
|
|
|
* @state_handle_mask - bitmask containing the instantiation status
|
|
|
|
* for the RNG4 state handles which exist in
|
|
|
|
* the RNG4 block: 1 if it's been instantiated
|
2013-09-09 09:56:32 -06:00
|
|
|
*
|
|
|
|
* Return: - 0 if no error occurred
|
|
|
|
* - -ENOMEM if there isn't enough memory to allocate the descriptor
|
|
|
|
* - -ENODEV if DECO0 couldn't be acquired
|
|
|
|
* - -EAGAIN if an error occurred when executing the descriptor
|
2012-06-22 18:48:52 -06:00
|
|
|
*/
|
2013-09-09 09:56:34 -06:00
|
|
|
static int deinstantiate_rng(struct device *ctrldev, int state_handle_mask)
|
2013-09-09 09:56:32 -06:00
|
|
|
{
|
2013-09-09 09:56:34 -06:00
|
|
|
u32 *desc, status;
|
|
|
|
int sh_idx, ret = 0;
|
2013-09-09 09:56:32 -06:00
|
|
|
|
|
|
|
desc = kmalloc(CAAM_CMD_SZ * 3, GFP_KERNEL);
|
|
|
|
if (!desc)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
2013-09-09 09:56:34 -06:00
|
|
|
for (sh_idx = 0; sh_idx < RNG4_MAX_HANDLES; sh_idx++) {
|
|
|
|
/*
|
|
|
|
* If the corresponding bit is set, then it means the state
|
|
|
|
* handle was initialized by us, and thus it needs to be
|
|
|
|
* deintialized as well
|
|
|
|
*/
|
|
|
|
if ((1 << sh_idx) & state_handle_mask) {
|
|
|
|
/*
|
|
|
|
* Create the descriptor for deinstantating this state
|
|
|
|
* handle
|
|
|
|
*/
|
|
|
|
build_deinstantiation_desc(desc, sh_idx);
|
|
|
|
|
|
|
|
/* Try to run it through DECO0 */
|
|
|
|
ret = run_descriptor_deco0(ctrldev, desc, &status);
|
|
|
|
|
|
|
|
if (ret || status) {
|
|
|
|
dev_err(ctrldev,
|
|
|
|
"Failed to deinstantiate RNG4 SH%d\n",
|
|
|
|
sh_idx);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
dev_info(ctrldev, "Deinstantiated RNG4 SH%d\n", sh_idx);
|
|
|
|
}
|
|
|
|
}
|
2013-09-09 09:56:32 -06:00
|
|
|
|
|
|
|
kfree(desc);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2013-09-09 09:56:31 -06:00
|
|
|
static int caam_remove(struct platform_device *pdev)
|
|
|
|
{
|
|
|
|
struct device *ctrldev;
|
|
|
|
struct caam_drv_private *ctrlpriv;
|
|
|
|
struct caam_full __iomem *topregs;
|
|
|
|
int ring, ret = 0;
|
|
|
|
|
|
|
|
ctrldev = &pdev->dev;
|
|
|
|
ctrlpriv = dev_get_drvdata(ctrldev);
|
|
|
|
topregs = (struct caam_full __iomem *)ctrlpriv->ctrl;
|
|
|
|
|
2013-10-25 00:31:01 -06:00
|
|
|
/* Remove platform devices for JobRs */
|
2013-09-09 09:56:31 -06:00
|
|
|
for (ring = 0; ring < ctrlpriv->total_jobrs; ring++) {
|
2013-10-25 00:31:01 -06:00
|
|
|
if (ctrlpriv->jrpdev[ring])
|
|
|
|
of_device_unregister(ctrlpriv->jrpdev[ring]);
|
2013-09-09 09:56:31 -06:00
|
|
|
}
|
|
|
|
|
2013-09-09 09:56:34 -06:00
|
|
|
/* De-initialize RNG state handles initialized by this driver. */
|
|
|
|
if (ctrlpriv->rng4_sh_init)
|
|
|
|
deinstantiate_rng(ctrldev, ctrlpriv->rng4_sh_init);
|
2013-09-09 09:56:32 -06:00
|
|
|
|
2013-09-09 09:56:31 -06:00
|
|
|
/* Shut down debug views */
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
|
|
debugfs_remove_recursive(ctrlpriv->dfs_root);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* Unmap controller region */
|
|
|
|
iounmap(&topregs->ctrl);
|
|
|
|
|
2012-06-22 18:48:52 -06:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2013-09-09 09:56:30 -06:00
|
|
|
* kick_trng - sets the various parameters for enabling the initialization
|
|
|
|
* of the RNG4 block in CAAM
|
|
|
|
* @pdev - pointer to the platform device
|
|
|
|
* @ent_delay - Defines the length (in system clocks) of each entropy sample.
|
2012-06-22 18:48:52 -06:00
|
|
|
*/
|
2013-09-09 09:56:30 -06:00
|
|
|
static void kick_trng(struct platform_device *pdev, int ent_delay)
|
2012-06-22 18:48:52 -06:00
|
|
|
{
|
|
|
|
struct device *ctrldev = &pdev->dev;
|
|
|
|
struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev);
|
|
|
|
struct caam_full __iomem *topregs;
|
|
|
|
struct rng4tst __iomem *r4tst;
|
|
|
|
u32 val;
|
|
|
|
|
|
|
|
topregs = (struct caam_full __iomem *)ctrlpriv->ctrl;
|
|
|
|
r4tst = &topregs->ctrl.r4tst[0];
|
|
|
|
|
|
|
|
/* put RNG4 into program mode */
|
|
|
|
setbits32(&r4tst->rtmctl, RTMCTL_PRGM);
|
2013-09-09 09:56:30 -06:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Performance-wise, it does not make sense to
|
|
|
|
* set the delay to a value that is lower
|
|
|
|
* than the last one that worked (i.e. the state handles
|
|
|
|
* were instantiated properly. Thus, instead of wasting
|
|
|
|
* time trying to set the values controlling the sample
|
|
|
|
* frequency, the function simply returns.
|
|
|
|
*/
|
|
|
|
val = (rd_reg32(&r4tst->rtsdctl) & RTSDCTL_ENT_DLY_MASK)
|
|
|
|
>> RTSDCTL_ENT_DLY_SHIFT;
|
|
|
|
if (ent_delay <= val) {
|
|
|
|
/* put RNG4 into run mode */
|
|
|
|
clrbits32(&r4tst->rtmctl, RTMCTL_PRGM);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2012-06-22 18:48:52 -06:00
|
|
|
val = rd_reg32(&r4tst->rtsdctl);
|
2013-09-09 09:56:30 -06:00
|
|
|
val = (val & ~RTSDCTL_ENT_DLY_MASK) |
|
|
|
|
(ent_delay << RTSDCTL_ENT_DLY_SHIFT);
|
2012-06-22 18:48:52 -06:00
|
|
|
wr_reg32(&r4tst->rtsdctl, val);
|
2013-09-09 09:56:30 -06:00
|
|
|
/* min. freq. count, equal to 1/4 of the entropy sample length */
|
|
|
|
wr_reg32(&r4tst->rtfrqmin, ent_delay >> 2);
|
|
|
|
/* max. freq. count, equal to 8 times the entropy sample length */
|
|
|
|
wr_reg32(&r4tst->rtfrqmax, ent_delay << 3);
|
2012-06-22 18:48:52 -06:00
|
|
|
/* put RNG4 into run mode */
|
|
|
|
clrbits32(&r4tst->rtmctl, RTMCTL_PRGM);
|
|
|
|
}
|
|
|
|
|
2012-07-10 21:06:11 -06:00
|
|
|
/**
|
|
|
|
* caam_get_era() - Return the ERA of the SEC on SoC, based
|
2014-02-06 01:27:19 -07:00
|
|
|
* on "sec-era" propery in the DTS. This property is updated by u-boot.
|
2012-07-10 21:06:11 -06:00
|
|
|
**/
|
2014-02-06 01:27:19 -07:00
|
|
|
int caam_get_era(void)
|
2012-07-10 21:06:11 -06:00
|
|
|
{
|
2014-02-06 01:27:19 -07:00
|
|
|
struct device_node *caam_node;
|
|
|
|
for_each_compatible_node(caam_node, NULL, "fsl,sec-v4.0") {
|
|
|
|
const uint32_t *prop = (uint32_t *)of_get_property(caam_node,
|
|
|
|
"fsl,sec-era",
|
|
|
|
NULL);
|
|
|
|
return prop ? *prop : -ENOTSUPP;
|
|
|
|
}
|
2012-07-10 21:06:11 -06:00
|
|
|
|
|
|
|
return -ENOTSUPP;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(caam_get_era);
|
|
|
|
|
2011-03-13 01:54:26 -07:00
|
|
|
/* Probe routine for CAAM top (controller) level */
|
2011-05-14 21:07:55 -06:00
|
|
|
static int caam_probe(struct platform_device *pdev)
|
2011-03-13 01:54:26 -07:00
|
|
|
{
|
2013-09-09 09:56:34 -06:00
|
|
|
int ret, ring, rspec, gen_sk, ent_delay = RTSDCTL_ENT_DLY_MIN;
|
2012-07-10 21:06:11 -06:00
|
|
|
u64 caam_id;
|
2011-03-13 01:54:26 -07:00
|
|
|
struct device *dev;
|
|
|
|
struct device_node *nprop, *np;
|
|
|
|
struct caam_ctrl __iomem *ctrl;
|
|
|
|
struct caam_full __iomem *topregs;
|
|
|
|
struct caam_drv_private *ctrlpriv;
|
2011-06-05 15:42:54 -06:00
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
|
|
struct caam_perfmon *perfmon;
|
|
|
|
#endif
|
2014-06-23 03:38:28 -06:00
|
|
|
u32 cha_vid_ls;
|
2011-03-13 01:54:26 -07:00
|
|
|
|
crypto: caam - Introduce the use of the managed version of kzalloc
This patch moves data allocated using kzalloc to managed data allocated
using devm_kzalloc and cleans now unnecessary kfrees in probe and remove
functions. Also, linux/device.h is added to make sure the devm_*()
routine declarations are unambiguously available. Earlier, in the probe
function ctrlpriv was leaked on the failure of ctrl = of_iomap(nprop, 0);
as well as on the failure of ctrlpriv->jrpdev = kzalloc(...); . These
two bugs have been fixed by the patch.
The following Coccinelle semantic patch was used for making the change:
identifier p, probefn, removefn;
@@
struct platform_driver p = {
.probe = probefn,
.remove = removefn,
};
@prb@
identifier platform.probefn, pdev;
expression e, e1, e2;
@@
probefn(struct platform_device *pdev, ...) {
<+...
- e = kzalloc(e1, e2)
+ e = devm_kzalloc(&pdev->dev, e1, e2)
...
?-kfree(e);
...+>
}
@rem depends on prb@
identifier platform.removefn;
expression e;
@@
removefn(...) {
<...
- kfree(e);
...>
}
Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Reviewed-by: Marek Vasut <marex@denx.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-05-27 12:25:48 -06:00
|
|
|
ctrlpriv = devm_kzalloc(&pdev->dev, sizeof(struct caam_drv_private),
|
|
|
|
GFP_KERNEL);
|
2011-03-13 01:54:26 -07:00
|
|
|
if (!ctrlpriv)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
dev = &pdev->dev;
|
|
|
|
dev_set_drvdata(dev, ctrlpriv);
|
|
|
|
ctrlpriv->pdev = pdev;
|
|
|
|
nprop = pdev->dev.of_node;
|
|
|
|
|
|
|
|
/* Get configuration properties from device tree */
|
|
|
|
/* First, get register page */
|
|
|
|
ctrl = of_iomap(nprop, 0);
|
|
|
|
if (ctrl == NULL) {
|
|
|
|
dev_err(dev, "caam: of_iomap() failed\n");
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
ctrlpriv->ctrl = (struct caam_ctrl __force *)ctrl;
|
|
|
|
|
|
|
|
/* topregs used to derive pointers to CAAM sub-blocks only */
|
|
|
|
topregs = (struct caam_full __iomem *)ctrl;
|
|
|
|
|
|
|
|
/* Get the IRQ of the controller (for security violations only) */
|
2013-09-18 07:24:44 -06:00
|
|
|
ctrlpriv->secvio_irq = irq_of_parse_and_map(nprop, 0);
|
2011-03-13 01:54:26 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Enable DECO watchdogs and, if this is a PHYS_ADDR_T_64BIT kernel,
|
2012-06-22 18:48:51 -06:00
|
|
|
* long pointers in master configuration register
|
2011-03-13 01:54:26 -07:00
|
|
|
*/
|
|
|
|
setbits32(&topregs->ctrl.mcr, MCFGR_WDENABLE |
|
|
|
|
(sizeof(dma_addr_t) == sizeof(u64) ? MCFGR_LONG_PTR : 0));
|
|
|
|
|
|
|
|
if (sizeof(dma_addr_t) == sizeof(u64))
|
2012-06-22 18:48:51 -06:00
|
|
|
if (of_device_is_compatible(nprop, "fsl,sec-v5.0"))
|
|
|
|
dma_set_mask(dev, DMA_BIT_MASK(40));
|
|
|
|
else
|
|
|
|
dma_set_mask(dev, DMA_BIT_MASK(36));
|
|
|
|
else
|
|
|
|
dma_set_mask(dev, DMA_BIT_MASK(32));
|
2011-03-13 01:54:26 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Detect and enable JobRs
|
|
|
|
* First, find out how many ring spec'ed, allocate references
|
|
|
|
* for all, then go probe each one.
|
|
|
|
*/
|
|
|
|
rspec = 0;
|
2014-02-08 18:59:13 -07:00
|
|
|
for_each_available_child_of_node(nprop, np)
|
|
|
|
if (of_device_is_compatible(np, "fsl,sec-v4.0-job-ring") ||
|
|
|
|
of_device_is_compatible(np, "fsl,sec4.0-job-ring"))
|
2012-03-21 00:09:10 -06:00
|
|
|
rspec++;
|
|
|
|
|
crypto: caam - Introduce the use of the managed version of kzalloc
This patch moves data allocated using kzalloc to managed data allocated
using devm_kzalloc and cleans now unnecessary kfrees in probe and remove
functions. Also, linux/device.h is added to make sure the devm_*()
routine declarations are unambiguously available. Earlier, in the probe
function ctrlpriv was leaked on the failure of ctrl = of_iomap(nprop, 0);
as well as on the failure of ctrlpriv->jrpdev = kzalloc(...); . These
two bugs have been fixed by the patch.
The following Coccinelle semantic patch was used for making the change:
identifier p, probefn, removefn;
@@
struct platform_driver p = {
.probe = probefn,
.remove = removefn,
};
@prb@
identifier platform.probefn, pdev;
expression e, e1, e2;
@@
probefn(struct platform_device *pdev, ...) {
<+...
- e = kzalloc(e1, e2)
+ e = devm_kzalloc(&pdev->dev, e1, e2)
...
?-kfree(e);
...+>
}
@rem depends on prb@
identifier platform.removefn;
expression e;
@@
removefn(...) {
<...
- kfree(e);
...>
}
Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Reviewed-by: Marek Vasut <marex@denx.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-05-27 12:25:48 -06:00
|
|
|
ctrlpriv->jrpdev = devm_kzalloc(&pdev->dev,
|
|
|
|
sizeof(struct platform_device *) * rspec,
|
|
|
|
GFP_KERNEL);
|
2013-10-25 00:31:01 -06:00
|
|
|
if (ctrlpriv->jrpdev == NULL) {
|
2011-03-13 01:54:26 -07:00
|
|
|
iounmap(&topregs->ctrl);
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
ring = 0;
|
|
|
|
ctrlpriv->total_jobrs = 0;
|
2014-02-08 18:59:13 -07:00
|
|
|
for_each_available_child_of_node(nprop, np)
|
|
|
|
if (of_device_is_compatible(np, "fsl,sec-v4.0-job-ring") ||
|
|
|
|
of_device_is_compatible(np, "fsl,sec4.0-job-ring")) {
|
2013-10-25 00:31:01 -06:00
|
|
|
ctrlpriv->jrpdev[ring] =
|
|
|
|
of_platform_device_create(np, NULL, dev);
|
|
|
|
if (!ctrlpriv->jrpdev[ring]) {
|
|
|
|
pr_warn("JR%d Platform device creation error\n",
|
|
|
|
ring);
|
|
|
|
continue;
|
|
|
|
}
|
2012-03-21 00:09:10 -06:00
|
|
|
ctrlpriv->total_jobrs++;
|
|
|
|
ring++;
|
|
|
|
}
|
2011-03-13 01:54:26 -07:00
|
|
|
|
|
|
|
/* Check to see if QI present. If so, enable */
|
2014-06-23 03:38:28 -06:00
|
|
|
ctrlpriv->qi_present =
|
|
|
|
!!(rd_reg32(&topregs->ctrl.perfmon.comp_parms_ms) &
|
|
|
|
CTPR_MS_QI_MASK);
|
2011-03-13 01:54:26 -07:00
|
|
|
if (ctrlpriv->qi_present) {
|
|
|
|
ctrlpriv->qi = (struct caam_queue_if __force *)&topregs->qi;
|
|
|
|
/* This is all that's required to physically enable QI */
|
|
|
|
wr_reg32(&topregs->qi.qi_control_lo, QICTL_DQEN);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* If no QI and no rings specified, quit and go home */
|
|
|
|
if ((!ctrlpriv->qi_present) && (!ctrlpriv->total_jobrs)) {
|
|
|
|
dev_err(dev, "no queues configured, terminating\n");
|
|
|
|
caam_remove(pdev);
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
2014-06-23 03:38:28 -06:00
|
|
|
cha_vid_ls = rd_reg32(&topregs->ctrl.perfmon.cha_id_ls);
|
2013-04-26 04:14:54 -06:00
|
|
|
|
2012-06-22 18:48:52 -06:00
|
|
|
/*
|
2013-04-26 04:14:54 -06:00
|
|
|
* If SEC has RNG version >= 4 and RNG state handle has not been
|
2013-09-09 09:56:30 -06:00
|
|
|
* already instantiated, do RNG instantiation
|
2012-06-22 18:48:52 -06:00
|
|
|
*/
|
2014-06-23 03:38:28 -06:00
|
|
|
if ((cha_vid_ls & CHA_ID_LS_RNG_MASK) >> CHA_ID_LS_RNG_SHIFT >= 4) {
|
2013-09-09 09:56:34 -06:00
|
|
|
ctrlpriv->rng4_sh_init =
|
|
|
|
rd_reg32(&topregs->ctrl.r4tst[0].rdsta);
|
|
|
|
/*
|
|
|
|
* If the secure keys (TDKEK, JDKEK, TDSK), were already
|
|
|
|
* generated, signal this to the function that is instantiating
|
|
|
|
* the state handles. An error would occur if RNG4 attempts
|
|
|
|
* to regenerate these keys before the next POR.
|
|
|
|
*/
|
|
|
|
gen_sk = ctrlpriv->rng4_sh_init & RDSTA_SKVN ? 0 : 1;
|
|
|
|
ctrlpriv->rng4_sh_init &= RDSTA_IFMASK;
|
2013-09-09 09:56:30 -06:00
|
|
|
do {
|
2013-09-09 09:56:34 -06:00
|
|
|
int inst_handles =
|
|
|
|
rd_reg32(&topregs->ctrl.r4tst[0].rdsta) &
|
|
|
|
RDSTA_IFMASK;
|
|
|
|
/*
|
|
|
|
* If either SH were instantiated by somebody else
|
|
|
|
* (e.g. u-boot) then it is assumed that the entropy
|
|
|
|
* parameters are properly set and thus the function
|
|
|
|
* setting these (kick_trng(...)) is skipped.
|
|
|
|
* Also, if a handle was instantiated, do not change
|
|
|
|
* the TRNG parameters.
|
|
|
|
*/
|
|
|
|
if (!(ctrlpriv->rng4_sh_init || inst_handles)) {
|
|
|
|
kick_trng(pdev, ent_delay);
|
|
|
|
ent_delay += 400;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* if instantiate_rng(...) fails, the loop will rerun
|
|
|
|
* and the kick_trng(...) function will modfiy the
|
|
|
|
* upper and lower limits of the entropy sampling
|
|
|
|
* interval, leading to a sucessful initialization of
|
|
|
|
* the RNG.
|
|
|
|
*/
|
|
|
|
ret = instantiate_rng(dev, inst_handles,
|
|
|
|
gen_sk);
|
2013-09-09 09:56:31 -06:00
|
|
|
} while ((ret == -EAGAIN) && (ent_delay < RTSDCTL_ENT_DLY_MAX));
|
2012-06-22 18:48:52 -06:00
|
|
|
if (ret) {
|
2013-09-09 09:56:30 -06:00
|
|
|
dev_err(dev, "failed to instantiate RNG");
|
2012-06-22 18:48:52 -06:00
|
|
|
caam_remove(pdev);
|
|
|
|
return ret;
|
|
|
|
}
|
2013-09-09 09:56:34 -06:00
|
|
|
/*
|
|
|
|
* Set handles init'ed by this module as the complement of the
|
|
|
|
* already initialized ones
|
|
|
|
*/
|
|
|
|
ctrlpriv->rng4_sh_init = ~ctrlpriv->rng4_sh_init & RDSTA_IFMASK;
|
2013-03-12 02:25:21 -06:00
|
|
|
|
|
|
|
/* Enable RDB bit so that RNG works faster */
|
|
|
|
setbits32(&topregs->ctrl.scfgr, SCFGR_RDBENABLE);
|
2012-06-22 18:48:52 -06:00
|
|
|
}
|
|
|
|
|
2011-03-13 01:54:26 -07:00
|
|
|
/* NOTE: RTIC detection ought to go here, around Si time */
|
|
|
|
|
2014-06-23 03:38:28 -06:00
|
|
|
caam_id = (u64)rd_reg32(&topregs->ctrl.perfmon.caam_id_ms) << 32 |
|
|
|
|
(u64)rd_reg32(&topregs->ctrl.perfmon.caam_id_ls);
|
2012-07-10 21:06:11 -06:00
|
|
|
|
2011-03-13 01:54:26 -07:00
|
|
|
/* Report "alive" for developer to see */
|
2012-07-10 21:06:11 -06:00
|
|
|
dev_info(dev, "device ID = 0x%016llx (Era %d)\n", caam_id,
|
2014-02-06 01:27:19 -07:00
|
|
|
caam_get_era());
|
2011-03-13 01:54:26 -07:00
|
|
|
dev_info(dev, "job rings = %d, qi = %d\n",
|
|
|
|
ctrlpriv->total_jobrs, ctrlpriv->qi_present);
|
|
|
|
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
|
|
/*
|
|
|
|
* FIXME: needs better naming distinction, as some amalgamation of
|
|
|
|
* "caam" and nprop->full_name. The OF name isn't distinctive,
|
|
|
|
* but does separate instances
|
|
|
|
*/
|
|
|
|
perfmon = (struct caam_perfmon __force *)&ctrl->perfmon;
|
|
|
|
|
|
|
|
ctrlpriv->dfs_root = debugfs_create_dir("caam", NULL);
|
|
|
|
ctrlpriv->ctl = debugfs_create_dir("ctl", ctrlpriv->dfs_root);
|
|
|
|
|
|
|
|
/* Controller-level - performance monitor counters */
|
|
|
|
ctrlpriv->ctl_rq_dequeued =
|
|
|
|
debugfs_create_u64("rq_dequeued",
|
2011-07-24 02:32:53 -06:00
|
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
2011-03-13 01:54:26 -07:00
|
|
|
ctrlpriv->ctl, &perfmon->req_dequeued);
|
|
|
|
ctrlpriv->ctl_ob_enc_req =
|
|
|
|
debugfs_create_u64("ob_rq_encrypted",
|
2011-07-24 02:32:53 -06:00
|
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
2011-03-13 01:54:26 -07:00
|
|
|
ctrlpriv->ctl, &perfmon->ob_enc_req);
|
|
|
|
ctrlpriv->ctl_ib_dec_req =
|
|
|
|
debugfs_create_u64("ib_rq_decrypted",
|
2011-07-24 02:32:53 -06:00
|
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
2011-03-13 01:54:26 -07:00
|
|
|
ctrlpriv->ctl, &perfmon->ib_dec_req);
|
|
|
|
ctrlpriv->ctl_ob_enc_bytes =
|
|
|
|
debugfs_create_u64("ob_bytes_encrypted",
|
2011-07-24 02:32:53 -06:00
|
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
2011-03-13 01:54:26 -07:00
|
|
|
ctrlpriv->ctl, &perfmon->ob_enc_bytes);
|
|
|
|
ctrlpriv->ctl_ob_prot_bytes =
|
|
|
|
debugfs_create_u64("ob_bytes_protected",
|
2011-07-24 02:32:53 -06:00
|
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
2011-03-13 01:54:26 -07:00
|
|
|
ctrlpriv->ctl, &perfmon->ob_prot_bytes);
|
|
|
|
ctrlpriv->ctl_ib_dec_bytes =
|
|
|
|
debugfs_create_u64("ib_bytes_decrypted",
|
2011-07-24 02:32:53 -06:00
|
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
2011-03-13 01:54:26 -07:00
|
|
|
ctrlpriv->ctl, &perfmon->ib_dec_bytes);
|
|
|
|
ctrlpriv->ctl_ib_valid_bytes =
|
|
|
|
debugfs_create_u64("ib_bytes_validated",
|
2011-07-24 02:32:53 -06:00
|
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
2011-03-13 01:54:26 -07:00
|
|
|
ctrlpriv->ctl, &perfmon->ib_valid_bytes);
|
|
|
|
|
|
|
|
/* Controller level - global status values */
|
|
|
|
ctrlpriv->ctl_faultaddr =
|
|
|
|
debugfs_create_u64("fault_addr",
|
2011-07-24 02:32:53 -06:00
|
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
2011-03-13 01:54:26 -07:00
|
|
|
ctrlpriv->ctl, &perfmon->faultaddr);
|
|
|
|
ctrlpriv->ctl_faultdetail =
|
|
|
|
debugfs_create_u32("fault_detail",
|
2011-07-24 02:32:53 -06:00
|
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
2011-03-13 01:54:26 -07:00
|
|
|
ctrlpriv->ctl, &perfmon->faultdetail);
|
|
|
|
ctrlpriv->ctl_faultstatus =
|
|
|
|
debugfs_create_u32("fault_status",
|
2011-07-24 02:32:53 -06:00
|
|
|
S_IRUSR | S_IRGRP | S_IROTH,
|
2011-03-13 01:54:26 -07:00
|
|
|
ctrlpriv->ctl, &perfmon->status);
|
|
|
|
|
|
|
|
/* Internal covering keys (useful in non-secure mode only) */
|
|
|
|
ctrlpriv->ctl_kek_wrap.data = &ctrlpriv->ctrl->kek[0];
|
|
|
|
ctrlpriv->ctl_kek_wrap.size = KEK_KEY_SIZE * sizeof(u32);
|
|
|
|
ctrlpriv->ctl_kek = debugfs_create_blob("kek",
|
2011-07-24 02:32:53 -06:00
|
|
|
S_IRUSR |
|
2011-03-13 01:54:26 -07:00
|
|
|
S_IRGRP | S_IROTH,
|
|
|
|
ctrlpriv->ctl,
|
|
|
|
&ctrlpriv->ctl_kek_wrap);
|
|
|
|
|
|
|
|
ctrlpriv->ctl_tkek_wrap.data = &ctrlpriv->ctrl->tkek[0];
|
|
|
|
ctrlpriv->ctl_tkek_wrap.size = KEK_KEY_SIZE * sizeof(u32);
|
|
|
|
ctrlpriv->ctl_tkek = debugfs_create_blob("tkek",
|
2011-07-24 02:32:53 -06:00
|
|
|
S_IRUSR |
|
2011-03-13 01:54:26 -07:00
|
|
|
S_IRGRP | S_IROTH,
|
|
|
|
ctrlpriv->ctl,
|
|
|
|
&ctrlpriv->ctl_tkek_wrap);
|
|
|
|
|
|
|
|
ctrlpriv->ctl_tdsk_wrap.data = &ctrlpriv->ctrl->tdsk[0];
|
|
|
|
ctrlpriv->ctl_tdsk_wrap.size = KEK_KEY_SIZE * sizeof(u32);
|
|
|
|
ctrlpriv->ctl_tdsk = debugfs_create_blob("tdsk",
|
2011-07-24 02:32:53 -06:00
|
|
|
S_IRUSR |
|
2011-03-13 01:54:26 -07:00
|
|
|
S_IRGRP | S_IROTH,
|
|
|
|
ctrlpriv->ctl,
|
|
|
|
&ctrlpriv->ctl_tdsk_wrap);
|
|
|
|
#endif
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct of_device_id caam_match[] = {
|
|
|
|
{
|
2011-03-23 07:15:44 -06:00
|
|
|
.compatible = "fsl,sec-v4.0",
|
2011-03-13 01:54:26 -07:00
|
|
|
},
|
2012-03-21 00:09:10 -06:00
|
|
|
{
|
|
|
|
.compatible = "fsl,sec4.0",
|
|
|
|
},
|
2011-03-13 01:54:26 -07:00
|
|
|
{},
|
|
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(of, caam_match);
|
|
|
|
|
2011-05-14 21:07:55 -06:00
|
|
|
static struct platform_driver caam_driver = {
|
2011-03-13 01:54:26 -07:00
|
|
|
.driver = {
|
|
|
|
.name = "caam",
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.of_match_table = caam_match,
|
|
|
|
},
|
|
|
|
.probe = caam_probe,
|
2012-12-21 14:14:09 -07:00
|
|
|
.remove = caam_remove,
|
2011-03-13 01:54:26 -07:00
|
|
|
};
|
|
|
|
|
2011-11-26 06:26:19 -07:00
|
|
|
module_platform_driver(caam_driver);
|
2011-03-13 01:54:26 -07:00
|
|
|
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_DESCRIPTION("FSL CAAM request backend");
|
|
|
|
MODULE_AUTHOR("Freescale Semiconductor - NMG/STC");
|