Rework firmware discovery during probe:
- move prints into the probe
- rename ffa_version to ffa_fw_version as the variable identifies the
version of the firmware and not the one we support
- add error prints when allocation fail during probe
No functional changes.
Signed-off-by: Bertrand Marquis <bertrand.marquis@arm.com>
---
Changes in v3:
- Revert spurious change assigning major_vers
- Remove error print in ffa_rxtx_init as we have already a print in the
main init function
Changes in v2:
- Fix error message when we fail to retrieve ffa_version
- Move back printing the firmware version before checking supported
features
- Use Warning instead of Info to inform user that FF-A is not supported
in firmware.
---
xen/arch/arm/tee/ffa.c | 41 ++++++++++++++++++++++---------------
xen/arch/arm/tee/ffa_rxtx.c | 4 +---
2 files changed, 26 insertions(+), 19 deletions(-)
diff --git a/xen/arch/arm/tee/ffa.c b/xen/arch/arm/tee/ffa.c
index 022089278e1c..5a7f297ca5c6 100644
--- a/xen/arch/arm/tee/ffa.c
+++ b/xen/arch/arm/tee/ffa.c
@@ -71,8 +71,8 @@
#include "ffa_private.h"
-/* Negotiated FF-A version to use with the SPMC */
-static uint32_t __ro_after_init ffa_version;
+/* Negotiated FF-A version to use with the SPMC, 0 if not there or supported */
+static uint32_t __ro_after_init ffa_fw_version;
/*
@@ -105,10 +105,7 @@ static bool ffa_get_version(uint32_t *vers)
arm_smccc_1_2_smc(&arg, &resp);
if ( resp.a0 == FFA_RET_NOT_SUPPORTED )
- {
- gprintk(XENLOG_ERR, "ffa: FFA_VERSION returned not supported\n");
return false;
- }
*vers = resp.a0;
@@ -372,7 +369,7 @@ static int ffa_domain_init(struct domain *d)
struct ffa_ctx *ctx;
int ret;
- if ( !ffa_version )
+ if ( !ffa_fw_version )
return -ENODEV;
/*
* We can't use that last possible domain ID or ffa_get_vm_id() would
@@ -505,6 +502,9 @@ static bool ffa_probe(void)
*/
BUILD_BUG_ON(PAGE_SIZE != FFA_PAGE_SIZE);
+ printk(XENLOG_INFO "ARM FF-A Mediator version %u.%u\n",
+ FFA_MY_VERSION_MAJOR, FFA_MY_VERSION_MINOR);
+
/*
* psci_init_smccc() updates this value with what's reported by EL-3
* or secure world.
@@ -514,22 +514,23 @@ static bool ffa_probe(void)
printk(XENLOG_ERR
"ffa: unsupported SMCCC version %#x (need at least %#x)\n",
smccc_ver, ARM_SMCCC_VERSION_1_2);
- return false;
+ goto err_no_fw;
}
if ( !ffa_get_version(&vers) )
- return false;
+ {
+ gprintk(XENLOG_ERR, "Cannot retrieve the FFA version\n");
+ goto err_no_fw;
+ }
if ( vers < FFA_MIN_SPMC_VERSION || vers > FFA_MY_VERSION )
{
printk(XENLOG_ERR "ffa: Incompatible version %#x found\n", vers);
- return false;
+ goto err_no_fw;
}
major_vers = (vers >> FFA_VERSION_MAJOR_SHIFT) & FFA_VERSION_MAJOR_MASK;
minor_vers = vers & FFA_VERSION_MINOR_MASK;
- printk(XENLOG_INFO "ARM FF-A Mediator version %u.%u\n",
- FFA_MY_VERSION_MAJOR, FFA_MY_VERSION_MINOR);
printk(XENLOG_INFO "ARM FF-A Firmware version %u.%u\n",
major_vers, minor_vers);
@@ -546,12 +547,18 @@ static bool ffa_probe(void)
!check_mandatory_feature(FFA_MEM_SHARE_32) ||
!check_mandatory_feature(FFA_MEM_RECLAIM) ||
!check_mandatory_feature(FFA_MSG_SEND_DIRECT_REQ_32) )
- return false;
+ {
+ printk(XENLOG_ERR "ffa: Mandatory feature not supported by fw\n");
+ goto err_no_fw;
+ }
- if ( !ffa_rxtx_init() )
- return false;
+ ffa_fw_version = vers;
- ffa_version = vers;
+ if ( !ffa_rxtx_init() )
+ {
+ printk(XENLOG_ERR "ffa: Error during RXTX buffer init\n");
+ goto err_no_fw;
+ }
if ( !ffa_partinfo_init() )
goto err_rxtx_destroy;
@@ -564,7 +571,9 @@ static bool ffa_probe(void)
err_rxtx_destroy:
ffa_rxtx_destroy();
- ffa_version = 0;
+err_no_fw:
+ ffa_fw_version = 0;
+ printk(XENLOG_WARNING "ARM FF-A No firmware support\n");
return false;
}
diff --git a/xen/arch/arm/tee/ffa_rxtx.c b/xen/arch/arm/tee/ffa_rxtx.c
index 661764052e67..c8bc516a19be 100644
--- a/xen/arch/arm/tee/ffa_rxtx.c
+++ b/xen/arch/arm/tee/ffa_rxtx.c
@@ -203,10 +203,8 @@ bool ffa_rxtx_init(void)
e = ffa_rxtx_map(__pa(ffa_tx), __pa(ffa_rx), FFA_RXTX_PAGE_COUNT);
if ( e )
- {
- printk(XENLOG_ERR "ffa: Failed to map rxtx: error %d\n", e);
goto err;
- }
+
return true;
err:
--
2.47.0Hi Bertrand,
On Wed, Nov 27, 2024 at 5:08 PM Bertrand Marquis
<bertrand.marquis@arm.com> wrote:
>
> Rework firmware discovery during probe:
> - move prints into the probe
> - rename ffa_version to ffa_fw_version as the variable identifies the
> version of the firmware and not the one we support
> - add error prints when allocation fail during probe
>
> No functional changes.
>
> Signed-off-by: Bertrand Marquis <bertrand.marquis@arm.com>
> ---
> Changes in v3:
> - Revert spurious change assigning major_vers
> - Remove error print in ffa_rxtx_init as we have already a print in the
> main init function
> Changes in v2:
> - Fix error message when we fail to retrieve ffa_version
> - Move back printing the firmware version before checking supported
> features
> - Use Warning instead of Info to inform user that FF-A is not supported
> in firmware.
> ---
> xen/arch/arm/tee/ffa.c | 41 ++++++++++++++++++++++---------------
> xen/arch/arm/tee/ffa_rxtx.c | 4 +---
> 2 files changed, 26 insertions(+), 19 deletions(-)
Looks good.
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Cheers,
Jens
>
> diff --git a/xen/arch/arm/tee/ffa.c b/xen/arch/arm/tee/ffa.c
> index 022089278e1c..5a7f297ca5c6 100644
> --- a/xen/arch/arm/tee/ffa.c
> +++ b/xen/arch/arm/tee/ffa.c
> @@ -71,8 +71,8 @@
>
> #include "ffa_private.h"
>
> -/* Negotiated FF-A version to use with the SPMC */
> -static uint32_t __ro_after_init ffa_version;
> +/* Negotiated FF-A version to use with the SPMC, 0 if not there or supported */
> +static uint32_t __ro_after_init ffa_fw_version;
>
>
> /*
> @@ -105,10 +105,7 @@ static bool ffa_get_version(uint32_t *vers)
>
> arm_smccc_1_2_smc(&arg, &resp);
> if ( resp.a0 == FFA_RET_NOT_SUPPORTED )
> - {
> - gprintk(XENLOG_ERR, "ffa: FFA_VERSION returned not supported\n");
> return false;
> - }
>
> *vers = resp.a0;
>
> @@ -372,7 +369,7 @@ static int ffa_domain_init(struct domain *d)
> struct ffa_ctx *ctx;
> int ret;
>
> - if ( !ffa_version )
> + if ( !ffa_fw_version )
> return -ENODEV;
> /*
> * We can't use that last possible domain ID or ffa_get_vm_id() would
> @@ -505,6 +502,9 @@ static bool ffa_probe(void)
> */
> BUILD_BUG_ON(PAGE_SIZE != FFA_PAGE_SIZE);
>
> + printk(XENLOG_INFO "ARM FF-A Mediator version %u.%u\n",
> + FFA_MY_VERSION_MAJOR, FFA_MY_VERSION_MINOR);
> +
> /*
> * psci_init_smccc() updates this value with what's reported by EL-3
> * or secure world.
> @@ -514,22 +514,23 @@ static bool ffa_probe(void)
> printk(XENLOG_ERR
> "ffa: unsupported SMCCC version %#x (need at least %#x)\n",
> smccc_ver, ARM_SMCCC_VERSION_1_2);
> - return false;
> + goto err_no_fw;
> }
>
> if ( !ffa_get_version(&vers) )
> - return false;
> + {
> + gprintk(XENLOG_ERR, "Cannot retrieve the FFA version\n");
> + goto err_no_fw;
> + }
>
> if ( vers < FFA_MIN_SPMC_VERSION || vers > FFA_MY_VERSION )
> {
> printk(XENLOG_ERR "ffa: Incompatible version %#x found\n", vers);
> - return false;
> + goto err_no_fw;
> }
>
> major_vers = (vers >> FFA_VERSION_MAJOR_SHIFT) & FFA_VERSION_MAJOR_MASK;
> minor_vers = vers & FFA_VERSION_MINOR_MASK;
> - printk(XENLOG_INFO "ARM FF-A Mediator version %u.%u\n",
> - FFA_MY_VERSION_MAJOR, FFA_MY_VERSION_MINOR);
> printk(XENLOG_INFO "ARM FF-A Firmware version %u.%u\n",
> major_vers, minor_vers);
>
> @@ -546,12 +547,18 @@ static bool ffa_probe(void)
> !check_mandatory_feature(FFA_MEM_SHARE_32) ||
> !check_mandatory_feature(FFA_MEM_RECLAIM) ||
> !check_mandatory_feature(FFA_MSG_SEND_DIRECT_REQ_32) )
> - return false;
> + {
> + printk(XENLOG_ERR "ffa: Mandatory feature not supported by fw\n");
> + goto err_no_fw;
> + }
>
> - if ( !ffa_rxtx_init() )
> - return false;
> + ffa_fw_version = vers;
>
> - ffa_version = vers;
> + if ( !ffa_rxtx_init() )
> + {
> + printk(XENLOG_ERR "ffa: Error during RXTX buffer init\n");
> + goto err_no_fw;
> + }
>
> if ( !ffa_partinfo_init() )
> goto err_rxtx_destroy;
> @@ -564,7 +571,9 @@ static bool ffa_probe(void)
>
> err_rxtx_destroy:
> ffa_rxtx_destroy();
> - ffa_version = 0;
> +err_no_fw:
> + ffa_fw_version = 0;
> + printk(XENLOG_WARNING "ARM FF-A No firmware support\n");
>
> return false;
> }
> diff --git a/xen/arch/arm/tee/ffa_rxtx.c b/xen/arch/arm/tee/ffa_rxtx.c
> index 661764052e67..c8bc516a19be 100644
> --- a/xen/arch/arm/tee/ffa_rxtx.c
> +++ b/xen/arch/arm/tee/ffa_rxtx.c
> @@ -203,10 +203,8 @@ bool ffa_rxtx_init(void)
>
> e = ffa_rxtx_map(__pa(ffa_tx), __pa(ffa_rx), FFA_RXTX_PAGE_COUNT);
> if ( e )
> - {
> - printk(XENLOG_ERR "ffa: Failed to map rxtx: error %d\n", e);
> goto err;
> - }
> +
> return true;
>
> err:
> --
> 2.47.0
>
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