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crypto: caam - fix JR platform device subsequent (re)creations

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The way Job Ring platform devices are created and released does not
allow for multiple create-release cycles.

JR0 Platform device creation error
JR0 Platform device creation error
caam 2100000.caam: no queues configured, terminating
caam: probe of 2100000.caam failed with error -12

The reason is that platform devices are created for each job ring:

        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")) {
                        ctrlpriv->jrpdev[ring] =
                                of_platform_device_create(np, NULL, dev);

which sets OF_POPULATED on the device node, but then it cleans these up:

        /* Remove platform devices for JobRs */
        for (ring = 0; ring < ctrlpriv->total_jobrs; ring++) {
                if (ctrlpriv->jrpdev[ring])
                        of_device_unregister(ctrlpriv->jrpdev[ring]);
        }

which leaves OF_POPULATED set.

Use of_platform_populate / of_platform_depopulate instead.
This allows for a bit of driver clean-up, jrpdev is no longer needed.

Logic changes a bit too:
-exit in case of_platform_populate fails, since currently even QI backend
depends on JR; true, we no longer support the case when "some" of the JR
DT nodes are incorrect
-when cleaning up, caam_remove() would also depopulate RTIC in case
it would have been populated somewhere else - not the case for now

Cc: <stable@vger.kernel.org>
Fixes: 313ea293e9 ("crypto: caam - Add Platform driver for Job Ring")
Reported-by: Russell King <rmk+kernel@armlinux.org.uk>
Suggested-by: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Horia Geantă 2017-04-03 18:12:04 +03:00 committed by Herbert Xu
parent 9df0eb180c
commit ec360607a2
2 changed files with 19 additions and 45 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

63
drivers/crypto/caam/ctrl.c
View File

@ -301,15 +301,13 @@ static int caam_remove(struct platform_device *pdev)
struct device *ctrldev;
struct caam_drv_private *ctrlpriv;
struct caam_ctrl __iomem *ctrl;
int ring;
ctrldev = &pdev->dev;
ctrlpriv = dev_get_drvdata(ctrldev);
ctrl = (struct caam_ctrl __iomem *)ctrlpriv->ctrl;
/* Remove platform devices for JobRs */
for (ring = 0; ring < ctrlpriv->total_jobrs; ring++)
of_device_unregister(ctrlpriv->jrpdev[ring]);
/* Remove platform devices under the crypto node */
of_platform_depopulate(ctrldev);
/* De-initialize RNG state handles initialized by this driver. */
if (ctrlpriv->rng4_sh_init)
@ -418,10 +416,21 @@ DEFINE_SIMPLE_ATTRIBUTE(caam_fops_u32_ro, caam_debugfs_u32_get, NULL, "%llu\n");
DEFINE_SIMPLE_ATTRIBUTE(caam_fops_u64_ro, caam_debugfs_u64_get, NULL, "%llu\n");
#endif
static const struct of_device_id caam_match[] = {
{
.compatible = "fsl,sec-v4.0",
},
{
.compatible = "fsl,sec4.0",
},
{},
};
MODULE_DEVICE_TABLE(of, caam_match);
/* Probe routine for CAAM top (controller) level */
static int caam_probe(struct platform_device *pdev)
{
int ret, ring, ridx, rspec, gen_sk, ent_delay = RTSDCTL_ENT_DLY_MIN;
int ret, ring, gen_sk, ent_delay = RTSDCTL_ENT_DLY_MIN;
u64 caam_id;
struct device *dev;
struct device_node *nprop, *np;
@ -597,47 +606,24 @@ static int caam_probe(struct platform_device *pdev)
goto iounmap_ctrl;
}
/*
* Detect and enable JobRs
* First, find out how many ring spec'ed, allocate references
* for all, then go probe each one.
*/
rspec = 0;
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"))
rspec++;
ctrlpriv->jrpdev = devm_kcalloc(&pdev->dev, rspec,
sizeof(*ctrlpriv->jrpdev), GFP_KERNEL);
if (ctrlpriv->jrpdev == NULL) {
ret = -ENOMEM;
ret = of_platform_populate(nprop, caam_match, NULL, dev);
if (ret) {
dev_err(dev, "JR platform devices creation error\n");
goto iounmap_ctrl;
}
ring = 0;
ridx = 0;
ctrlpriv->total_jobrs = 0;
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")) {
ctrlpriv->jrpdev[ring] =
of_platform_device_create(np, NULL, dev);
if (!ctrlpriv->jrpdev[ring]) {
pr_warn("JR physical index %d: Platform device creation error\n",
ridx);
ridx++;
continue;
}
ctrlpriv->jr[ring] = (struct caam_job_ring __iomem __force *)
((__force uint8_t *)ctrl +
(ridx + JR_BLOCK_NUMBER) *
(ring + JR_BLOCK_NUMBER) *
BLOCK_OFFSET
);
ctrlpriv->total_jobrs++;
ring++;
ridx++;
}
}
/* Check to see if QI present. If so, enable */
ctrlpriv->qi_present =
@ -847,17 +833,6 @@ disable_caam_ipg:
return ret;
}
static struct of_device_id caam_match[] = {
{
.compatible = "fsl,sec-v4.0",
},
{
.compatible = "fsl,sec4.0",
},
{},
};
MODULE_DEVICE_TABLE(of, caam_match);
static struct platform_driver caam_driver = {
.driver = {
.name = "caam",

1
drivers/crypto/caam/intern.h
View File

@ -66,7 +66,6 @@ struct caam_drv_private_jr {
struct caam_drv_private {
struct device *dev;
struct platform_device **jrpdev; /* Alloc'ed array per sub-device */
struct platform_device *pdev;
/* Physical-presence section */