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firmware: arm_ffa: Use FFA_FEATURES to detect if native versions are supported

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Currently, the ffa_dev->mode_32bit is use to detect if the native 64-bit
or 32-bit versions of FF-A ABI needs to be used. However for the FF-A
memory ABIs, it is not dependent on the ffa_device(i.e. the partition)
itself, but the partition manager(SPM).

So, the FFA_FEATURES can be use to detect if the native 64bit ABIs are
supported or not and appropriate calls can be made based on that.

Use FFA_FEATURES to detect if native versions of MEM_LEND or MEM_SHARE
are implemented and make of the same to use native memory ABIs later on.

Link: https://lore.kernel.org/r/20220907145240.1683088-6-sudeep.holla@arm.com
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
This commit is contained in:
Sudeep Holla 2022-09-07 15:52:35 +01:00
parent cb1f4c2c15
commit e57fba9105
1 changed files with 16 additions and 6 deletions
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22
drivers/firmware/arm_ffa/driver.c
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@ -163,6 +163,7 @@ struct ffa_drv_info {
struct mutex tx_lock; /* lock to protect Tx buffer */
void *rx_buffer;
void *tx_buffer;
bool mem_ops_native;
};
static struct ffa_drv_info *drv_info;
@ -597,6 +598,13 @@ static int ffa_features(u32 func_feat_id, u32 input_props,
return 0;
}
static void ffa_set_up_mem_ops_native_flag(void)
{
if (!ffa_features(FFA_FN_NATIVE(MEM_LEND), 0, NULL, NULL) ||
!ffa_features(FFA_FN_NATIVE(MEM_SHARE), 0, NULL, NULL))
drv_info->mem_ops_native = true;
}
static u32 ffa_api_version_get(void)
{
return drv_info->version;
@ -638,10 +646,10 @@ static int ffa_sync_send_receive(struct ffa_device *dev,
static int
ffa_memory_share(struct ffa_device *dev, struct ffa_mem_ops_args *args)
{
if (dev->mode_32bit)
return ffa_memory_ops(FFA_MEM_SHARE, args);
if (drv_info->mem_ops_native)
return ffa_memory_ops(FFA_FN_NATIVE(MEM_SHARE), args);
return ffa_memory_ops(FFA_FN_NATIVE(MEM_SHARE), args);
return ffa_memory_ops(FFA_MEM_SHARE, args);
}
static int
@ -654,10 +662,10 @@ ffa_memory_lend(struct ffa_device *dev, struct ffa_mem_ops_args *args)
* however on systems without a hypervisor the responsibility
* falls to the calling kernel driver to prevent access.
*/
if (dev->mode_32bit)
return ffa_memory_ops(FFA_MEM_LEND, args);
if (drv_info->mem_ops_native)
return ffa_memory_ops(FFA_FN_NATIVE(MEM_LEND), args);
return ffa_memory_ops(FFA_FN_NATIVE(MEM_LEND), args);
return ffa_memory_ops(FFA_MEM_LEND, args);
}
static const struct ffa_dev_ops ffa_ops = {
@ -768,6 +776,8 @@ static int __init ffa_init(void)
ffa_setup_partitions();
ffa_set_up_mem_ops_native_flag();
return 0;
free_pages:
if (drv_info->tx_buffer)