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authorSudeep Holla <sudeep.holla@arm.com>2021-09-17 14:33:47 +0100
committerJassi Brar <jaswinder.singh@linaro.org>2021-10-29 22:46:38 -0500
commit319bfb35bd1dbc1b67e577c9893b9e8b29650b19 (patch)
tree294c9994b33750ac3bb0a99a880e7b1d1cd5b28e /drivers/mailbox
parent80b2bdde002c521284ce472a849784f599626276 (diff)
downloadlinux-319bfb35bd1dbc1b67e577c9893b9e8b29650b19.tar.bz2
mailbox: pcc: Consolidate subspace interrupt information parsing
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 IRQ related information parsing into pcc_parse_subspace_irq and consolidate there. It will be easier to extend it if required within the same. Reviewed-by: Cristian Marussi <cristian.marussi@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Diffstat (limited to 'drivers/mailbox')
-rw-r--r--drivers/mailbox/pcc.c38
1 files changed, 19 insertions, 19 deletions
diff --git a/drivers/mailbox/pcc.c b/drivers/mailbox/pcc.c
index 588d2207edf9..efde77d7038c 100644
--- a/drivers/mailbox/pcc.c
+++ b/drivers/mailbox/pcc.c
@@ -405,18 +405,26 @@ static int parse_pcc_subspace(union acpi_subtable_headers *header,
/**
* pcc_parse_subspace_irq - Parse the PCC IRQ and PCC ACK register
- * There should be one entry per PCC client.
- * @id: PCC subspace index.
- * @pcct_ss: Pointer to the ACPI subtable header under the PCCT.
+ *
+ * @pchan: Pointer to the PCC channel info structure.
+ * @pcct_entry: Pointer to the ACPI subtable header.
*
* Return: 0 for Success, else errno.
*
- * This gets called for each entry in the PCC table.
+ * There should be one entry per PCC channel. This gets called for each
+ * entry in the PCC table. This uses PCCY Type1 structure for all applicable
+ * types(Type 1-4) to fetch irq
*/
-static int pcc_parse_subspace_irq(int id, struct acpi_pcct_hw_reduced *pcct_ss)
+static int pcc_parse_subspace_irq(struct pcc_chan_info *pchan,
+ struct acpi_subtable_header *pcct_entry)
{
- struct pcc_chan_info *pchan = chan_info + id;
+ struct acpi_pcct_hw_reduced *pcct_ss;
+ if (pcct_entry->type < ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE ||
+ pcct_entry->type > ACPI_PCCT_TYPE_EXT_PCC_SLAVE_SUBSPACE)
+ return 0;
+
+ pcct_ss = (struct acpi_pcct_hw_reduced *)pcct_entry;
pchan->db_irq = pcc_map_interrupt(pcct_ss->platform_interrupt,
(u32)pcct_ss->flags);
if (pchan->db_irq <= 0) {
@@ -425,8 +433,7 @@ static int pcc_parse_subspace_irq(int id, struct acpi_pcct_hw_reduced *pcct_ss)
return -EINVAL;
}
- if (pcct_ss->header.type
- == ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE_TYPE2) {
+ if (pcct_ss->header.type == ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE_TYPE2) {
struct acpi_pcct_hw_reduced_type2 *pcct2_ss = (void *)pcct_ss;
pchan->db_ack_vaddr =
@@ -510,17 +517,10 @@ static int __init acpi_pcc_probe(void)
struct acpi_pcct_subspace *pcct_ss;
pcc_mbox_channels[i].con_priv = pcct_entry;
- if (pcct_entry->type == ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE ||
- pcct_entry->type == ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE_TYPE2) {
- struct acpi_pcct_hw_reduced *pcct_hrss;
-
- pcct_hrss = (struct acpi_pcct_hw_reduced *) pcct_entry;
-
- if (pcc_mbox_ctrl.txdone_irq) {
- rc = pcc_parse_subspace_irq(i, pcct_hrss);
- if (rc < 0)
- goto err;
- }
+ if (pcc_mbox_ctrl.txdone_irq) {
+ rc = pcc_parse_subspace_irq(pchan, pcct_entry);
+ if (rc < 0)
+ goto err;
}
pcct_ss = (struct acpi_pcct_subspace *) pcct_entry;