linux-kernel - [PATCH v4 15/17] firmware: arm_ffa: Switch to using ffa_mem_desc

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Date:   Thu, 05 Oct 2023 15:45:08 +0100
From:   Sudeep Holla <sudeep.holla@....com>
To:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Sudeep Holla <sudeep.holla@....com>,
        Marc Bonnici <marc.bonnici@....com>,
        Jens Wiklander <jens.wiklander@...aro.org>,
        Coboy Chen <coboy.chen@...iatek.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Olivier Deprez <olivier.deprez@....com>
Subject: [PATCH v4 15/17] firmware: arm_ffa: Switch to using
 ffa_mem_desc_offset() accessor

In preparation to add support to the new memory transaction descriptor,
the ep_mem_access member needs to be removed and hence even the macro
COMPOSITE_OFFSET(). Let us switch to using the new ffa_mem_desc_offset()
accessor in ffa_setup_and_transmit().

This will enable adding the support for new format transparently without
any changes here again.

Signed-off-by: Sudeep Holla <sudeep.holla@....com>
---
 drivers/firmware/arm_ffa/driver.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c
index 45ad704734a2..4de08ffce599 100644
--- a/drivers/firmware/arm_ffa/driver.c
+++ b/drivers/firmware/arm_ffa/driver.c
@@ -454,8 +454,10 @@ ffa_setup_and_transmit(u32 func_id, void *buffer, u32 max_fragsize,
 	mem_region->flags = args->flags;
 	mem_region->sender_id = drv_info->vm_id;
 	mem_region->attributes = ffa_memory_attributes_get(func_id);
-	ep_mem_access = buffer + COMPOSITE_OFFSET(0);
-	composite_offset = COMPOSITE_OFFSET(args->nattrs);
+	ep_mem_access = buffer +
+			ffa_mem_desc_offset(buffer, 0, drv_info->version);
+	composite_offset = ffa_mem_desc_offset(buffer, args->nattrs,
+					       drv_info->version);
 
 	for (idx = 0; idx < args->nattrs; idx++, ep_mem_access++) {
 		ep_mem_access->receiver = args->attrs[idx].receiver;

-- 
2.42.0