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| author | Anup Patel <apatel@ventanamicro.com> | 2025-05-12 14:08:26 +0530 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2025-05-20 11:10:35 +0530 |
| commit | 8fadfebdd1c2fb8680d4a9c482d577e9f0e28572 (patch) | |
| tree | 9a269744dd9758df4493ff6644562bd58533bbb6 /lib | |
| parent | a79566175c01e369d9c5536aa9accbb5c17e2376 (diff) | |
| download | opensbi-8fadfebdd1c2fb8680d4a9c482d577e9f0e28572.zip opensbi-8fadfebdd1c2fb8680d4a9c482d577e9f0e28572.tar.gz opensbi-8fadfebdd1c2fb8680d4a9c482d577e9f0e28572.tar.bz2 | |
lib: utils/mailbox: Parse A2P doorbell value from DT
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>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/utils/mailbox/fdt_mailbox_rpmi_shmem.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/lib/utils/mailbox/fdt_mailbox_rpmi_shmem.c b/lib/utils/mailbox/fdt_mailbox_rpmi_shmem.c index 164ae14..aad68b5 100644 --- a/lib/utils/mailbox/fdt_mailbox_rpmi_shmem.c +++ b/lib/utils/mailbox/fdt_mailbox_rpmi_shmem.c @@ -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 |