[PATCH v2 05/14] mailbox: pcc: Consolidate subspace doorbell register parsing

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Extended PCC subspaces(Type 3 and 4) differ from generic(Type 0) and
HW-Reduced Communication(Type 1 and 2) subspace structures. However some
fields share same offsets and same type of structure can be use to
extract the fields. In order to simplify that, let us move all the doorbell
register parsing into pcc_parse_subspace_db_reg and consolidate there.
It will be easier to extend it if required within the same.

Reviewed-by: Cristian Marussi <cristian.marussi@xxxxxxx>
Signed-off-by: Sudeep Holla <sudeep.holla@xxxxxxx>
---
 drivers/mailbox/pcc.c | 31 +++++++++++++++++++++++--------
 1 file changed, 23 insertions(+), 8 deletions(-)

diff --git a/drivers/mailbox/pcc.c b/drivers/mailbox/pcc.c
index efde77d7038c..97c44c431ada 100644
--- a/drivers/mailbox/pcc.c
+++ b/drivers/mailbox/pcc.c
@@ -448,6 +448,28 @@ static int pcc_parse_subspace_irq(struct pcc_chan_info *pchan,
 	return 0;
 }
 
+/**
+ * pcc_parse_subspace_db_reg - Parse the PCC doorbell register
+ *
+ * @pchan: Pointer to the PCC channel info structure.
+ * @pcct_entry: Pointer to the ACPI subtable header.
+ *
+ */
+static void pcc_parse_subspace_db_reg(struct pcc_chan_info *pchan,
+				      struct acpi_subtable_header *pcct_entry)
+{
+	struct acpi_pcct_subspace *pcct_ss;
+	struct acpi_generic_address *db_reg;
+
+	pcct_ss = (struct acpi_pcct_subspace *)pcct_entry;
+
+	/* If doorbell is in system memory cache the virt address */
+	db_reg = &pcct_ss->doorbell_register;
+	if (db_reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
+		pchan->db_vaddr = acpi_os_ioremap(db_reg->address,
+						  db_reg->bit_width / 8);
+}
+
 /**
  * acpi_pcc_probe - Parse the ACPI tree for the PCCT.
  *
@@ -513,8 +535,6 @@ static int __init acpi_pcc_probe(void)
 
 	for (i = 0; i < count; i++) {
 		struct pcc_chan_info *pchan = chan_info + i;
-		struct acpi_generic_address *db_reg;
-		struct acpi_pcct_subspace *pcct_ss;
 		pcc_mbox_channels[i].con_priv = pcct_entry;
 
 		if (pcc_mbox_ctrl.txdone_irq) {
@@ -522,13 +542,8 @@ static int __init acpi_pcc_probe(void)
 			if (rc < 0)
 				goto err;
 		}
-		pcct_ss = (struct acpi_pcct_subspace *) pcct_entry;
+		pcc_parse_subspace_db_reg(pchan, pcct_entry);
 
-		/* If doorbell is in system memory cache the virt address */
-		db_reg = &pcct_ss->doorbell_register;
-		if (db_reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
-			pchan->db_vaddr = acpi_os_ioremap(db_reg->address,
-							  db_reg->bit_width / 8);
 		pcct_entry = (struct acpi_subtable_header *)
 			((unsigned long) pcct_entry + pcct_entry->length);
 	}
-- 
2.25.1




[Index of Archives]     [Linux IBM ACPI]     [Linux Power Management]     [Linux Kernel]     [Linux Laptop]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Video 4 Linux]     [Device Mapper]     [Linux Resources]

  Powered by Linux