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authorAndrei Botila <andrei.botila@nxp.com>2020-03-19 09:12:31 -0700
committerHerbert Xu <herbert@gondor.apana.org.au>2020-03-30 11:50:49 +1100
commit0544cb75bd7df357c1758b760ecc7709125c139a (patch)
tree83b3fc194b1f4b804bda2d3d03b487509f45b1c1 /drivers/bus
parent551ce72a78e2c5493fa987410437e54b5f3fdd34 (diff)
downloadlinux-0544cb75bd7df357c1758b760ecc7709125c139a.tar.bz2
bus: fsl-mc: add api to retrieve mc version
Add a new api that returns Management Complex firmware version and make the required structure public. The api's first user will be the caam driver for setting prediction resistance bits. Signed-off-by: Andrei Botila <andrei.botila@nxp.com> Acked-by: Laurentiu Tudor <laurentiu.tudor@nxp.com> Reviewed-by: Horia Geantă <horia.geanta@nxp.com> Cc: Chris Healy <cphealy@gmail.com> Cc: Lucas Stach <l.stach@pengutronix.de> Cc: Horia Geantă <horia.geanta@nxp.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Iuliana Prodan <iuliana.prodan@nxp.com> Cc: linux-crypto@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-imx@nxp.com Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/bus')
-rw-r--r--drivers/bus/fsl-mc/fsl-mc-bus.c33
1 files changed, 17 insertions, 16 deletions
diff --git a/drivers/bus/fsl-mc/fsl-mc-bus.c b/drivers/bus/fsl-mc/fsl-mc-bus.c
index c78d10ea641f..40526da5c6a6 100644
--- a/drivers/bus/fsl-mc/fsl-mc-bus.c
+++ b/drivers/bus/fsl-mc/fsl-mc-bus.c
@@ -26,6 +26,8 @@
*/
#define FSL_MC_DEFAULT_DMA_MASK (~0ULL)
+static struct fsl_mc_version mc_version;
+
/**
* struct fsl_mc - Private data of a "fsl,qoriq-mc" platform device
* @root_mc_bus_dev: fsl-mc device representing the root DPRC
@@ -55,20 +57,6 @@ struct fsl_mc_addr_translation_range {
};
/**
- * struct mc_version
- * @major: Major version number: incremented on API compatibility changes
- * @minor: Minor version number: incremented on API additions (that are
- * backward compatible); reset when major version is incremented
- * @revision: Internal revision number: incremented on implementation changes
- * and/or bug fixes that have no impact on API
- */
-struct mc_version {
- u32 major;
- u32 minor;
- u32 revision;
-};
-
-/**
* fsl_mc_bus_match - device to driver matching callback
* @dev: the fsl-mc device to match against
* @drv: the device driver to search for matching fsl-mc object type
@@ -338,7 +326,7 @@ EXPORT_SYMBOL_GPL(fsl_mc_driver_unregister);
*/
static int mc_get_version(struct fsl_mc_io *mc_io,
u32 cmd_flags,
- struct mc_version *mc_ver_info)
+ struct fsl_mc_version *mc_ver_info)
{
struct fsl_mc_command cmd = { 0 };
struct dpmng_rsp_get_version *rsp_params;
@@ -364,6 +352,20 @@ static int mc_get_version(struct fsl_mc_io *mc_io,
}
/**
+ * fsl_mc_get_version - function to retrieve the MC f/w version information
+ *
+ * Return: mc version when called after fsl-mc-bus probe; NULL otherwise.
+ */
+struct fsl_mc_version *fsl_mc_get_version(void)
+{
+ if (mc_version.major)
+ return &mc_version;
+
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(fsl_mc_get_version);
+
+/**
* fsl_mc_get_root_dprc - function to traverse to the root dprc
*/
static void fsl_mc_get_root_dprc(struct device *dev,
@@ -862,7 +864,6 @@ static int fsl_mc_bus_probe(struct platform_device *pdev)
int container_id;
phys_addr_t mc_portal_phys_addr;
u32 mc_portal_size;
- struct mc_version mc_version;
struct resource res;
mc = devm_kzalloc(&pdev->dev, sizeof(*mc), GFP_KERNEL);