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lib: utils/mailbox: Parse A2P doorbell value from DT

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The A2P doorbell value written to the 32-bit A2P doorbell value
must be discoverd from device tree instead of always using the
default value 1.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Link: https://lore.kernel.org/r/20250512083827.804151-4-apatel@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Anup Patel
2025-05-12 14:08:26 +05:30
committed by Anup Patel
parent a79566175c
commit 8fadfebdd1
1 changed files with 10 additions and 4 deletions
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14
lib/utils/mailbox/fdt_mailbox_rpmi_shmem.c
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@@ -134,6 +134,7 @@ struct rpmi_shmem_mbox_controller {
u32 slot_size;
u32 queue_count;
u32 p2a_doorbell_sysmsi_index;
u32 a2p_doorbell_value;
struct rpmi_mb_regs *mb_regs;
struct smq_queue_ctx queue_ctx_tbl[RPMI_QUEUE_IDX_MAX_COUNT];
/* Mailbox framework related members */
@@ -248,7 +249,8 @@ static int __smq_rx(struct smq_queue_ctx *qctx, u32 slot_size,
}
static int __smq_tx(struct smq_queue_ctx *qctx, struct rpmi_mb_regs *mb_regs,
u32 slot_size, u32 service_group_id, struct mbox_xfer *xfer)
u32 a2p_doorbell_value, u32 slot_size, u32 service_group_id,
struct mbox_xfer *xfer)
{
u32 i, tailidx;
void *dst, *src;
@@ -300,7 +302,7 @@ static int __smq_tx(struct smq_queue_ctx *qctx, struct rpmi_mb_regs *mb_regs,
/* Ring the RPMI doorbell if present */
if (mb_regs)
writel(cpu_to_le32(1), &mb_regs->db_reg);
writel(a2p_doorbell_value, &mb_regs->db_reg);
return SBI_OK;
}
@@ -364,8 +366,8 @@ static int smq_tx(struct rpmi_shmem_mbox_controller *mctl,
*/
do {
spin_lock(&qctx->queue_lock);
ret = __smq_tx(qctx, mctl->mb_regs, mctl->slot_size,
service_group_id, xfer);
ret = __smq_tx(qctx, mctl->mb_regs, mctl->a2p_doorbell_value,
mctl->slot_size, service_group_id, xfer);
spin_unlock(&qctx->queue_lock);
if (!ret)
return 0;
@@ -604,6 +606,10 @@ static int rpmi_shmem_transport_init(struct rpmi_shmem_mbox_controller *mctl,
prop = fdt_getprop(fdt, nodeoff, "riscv,p2a-doorbell-sysmsi-index", &len);
mctl->p2a_doorbell_sysmsi_index = prop ? fdt32_to_cpu(*prop) : -1U;
/* get a2p doorbell value */
prop = fdt_getprop(fdt, nodeoff, "riscv,a2p-doorbell-value", &len);
mctl->a2p_doorbell_value = prop ? fdt32_to_cpu(*prop) : 1;
/*
* queue names count is taken as the number of queues
* supported which make it mandatory to provide the