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Message-Id: <20230731091333.3593132-3-yung-chuan.liao@linux.intel.com>
Date: Mon, 31 Jul 2023 17:13:32 +0800
From: Bard Liao <yung-chuan.liao@...ux.intel.com>
To: alsa-devel@...a-project.org, vkoul@...nel.org
Cc: vinod.koul@...aro.org, linux-kernel@...r.kernel.org,
pierre-louis.bossart@...ux.intel.com, bard.liao@...el.com
Subject: [PATCH v2 2/3] soundwire: bus: add callbacks for device_number allocation
From: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Rather than add logic in the core for vendor-specific usages, add
callbacks for vendor-specific device_number allocation and release.
This patch only moves the existing IDA-based allocator used only by
Intel to the intel_auxdevice.c file and does not change the
functionality. Follow-up patches will extend the behavior by modifying
the Intel callbacks.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Reviewed-by: Rander Wang <rander.wang@...el.com>
Signed-off-by: Bard Liao <yung-chuan.liao@...ux.intel.com>
---
drivers/soundwire/bus.c | 16 +++++++---------
drivers/soundwire/intel_auxdevice.c | 17 ++++++++++++++++-
include/linux/soundwire/sdw.h | 8 ++++----
3 files changed, 27 insertions(+), 14 deletions(-)
diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c
index bdd0fed45a8d..0e1e4bedc708 100644
--- a/drivers/soundwire/bus.c
+++ b/drivers/soundwire/bus.c
@@ -12,7 +12,6 @@
#include "sysfs_local.h"
static DEFINE_IDA(sdw_bus_ida);
-static DEFINE_IDA(sdw_peripheral_ida);
static int sdw_get_id(struct sdw_bus *bus)
{
@@ -168,8 +167,8 @@ static int sdw_delete_slave(struct device *dev, void *data)
if (slave->dev_num) { /* clear dev_num if assigned */
clear_bit(slave->dev_num, bus->assigned);
- if (bus->dev_num_ida_min)
- ida_free(&sdw_peripheral_ida, slave->dev_num);
+ if (bus->ops && bus->ops->put_device_num)
+ bus->ops->put_device_num(bus, slave);
}
list_del_init(&slave->node);
mutex_unlock(&bus->bus_lock);
@@ -710,16 +709,15 @@ EXPORT_SYMBOL(sdw_compare_devid);
/* called with bus_lock held */
static int sdw_get_device_num(struct sdw_slave *slave)
{
+ struct sdw_bus *bus = slave->bus;
int bit;
- if (slave->bus->dev_num_ida_min) {
- bit = ida_alloc_range(&sdw_peripheral_ida,
- slave->bus->dev_num_ida_min, SDW_MAX_DEVICES,
- GFP_KERNEL);
+ if (bus->ops && bus->ops->get_device_num) {
+ bit = bus->ops->get_device_num(bus, slave);
if (bit < 0)
goto err;
} else {
- bit = find_first_zero_bit(slave->bus->assigned, SDW_MAX_DEVICES);
+ bit = find_first_zero_bit(bus->assigned, SDW_MAX_DEVICES);
if (bit == SDW_MAX_DEVICES) {
bit = -ENODEV;
goto err;
@@ -730,7 +728,7 @@ static int sdw_get_device_num(struct sdw_slave *slave)
* Do not update dev_num in Slave data structure here,
* Update once program dev_num is successful
*/
- set_bit(bit, slave->bus->assigned);
+ set_bit(bit, bus->assigned);
err:
return bit;
diff --git a/drivers/soundwire/intel_auxdevice.c b/drivers/soundwire/intel_auxdevice.c
index cb2f199f4f97..9d998a010162 100644
--- a/drivers/soundwire/intel_auxdevice.c
+++ b/drivers/soundwire/intel_auxdevice.c
@@ -125,6 +125,20 @@ static int intel_prop_read(struct sdw_bus *bus)
return 0;
}
+static DEFINE_IDA(intel_peripheral_ida);
+
+static int intel_get_device_num_ida(struct sdw_bus *bus, struct sdw_slave *slave)
+{
+ return ida_alloc_range(&intel_peripheral_ida,
+ INTEL_DEV_NUM_IDA_MIN, SDW_MAX_DEVICES,
+ GFP_KERNEL);
+}
+
+static void intel_put_device_num_ida(struct sdw_bus *bus, struct sdw_slave *slave)
+{
+ return ida_free(&intel_peripheral_ida, slave->dev_num);
+}
+
static struct sdw_master_ops sdw_intel_ops = {
.read_prop = intel_prop_read,
.override_adr = sdw_dmi_override_adr,
@@ -134,6 +148,8 @@ static struct sdw_master_ops sdw_intel_ops = {
.pre_bank_switch = generic_pre_bank_switch,
.post_bank_switch = generic_post_bank_switch,
.read_ping_status = cdns_read_ping_status,
+ .get_device_num = intel_get_device_num_ida,
+ .put_device_num = intel_put_device_num_ida,
.new_peripheral_assigned = generic_new_peripheral_assigned,
};
@@ -167,7 +183,6 @@ static int intel_link_probe(struct auxiliary_device *auxdev,
cdns->msg_count = 0;
bus->link_id = auxdev->id;
- bus->dev_num_ida_min = INTEL_DEV_NUM_IDA_MIN;
bus->clk_stop_timeout = 1;
sdw_cdns_probe(cdns);
diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h
index 94676a3fd0b5..bde93ca6aaa6 100644
--- a/include/linux/soundwire/sdw.h
+++ b/include/linux/soundwire/sdw.h
@@ -847,6 +847,8 @@ struct sdw_defer {
* @post_bank_switch: Callback for post bank switch
* @read_ping_status: Read status from PING frames, reported with two bits per Device.
* Bits 31:24 are reserved.
+ * @get_device_num: Callback for vendor-specific device_number allocation
+ * @put_device_num: Callback for vendor-specific device_number release
* @new_peripheral_assigned: Callback to handle enumeration of new peripheral.
*/
struct sdw_master_ops {
@@ -862,6 +864,8 @@ struct sdw_master_ops {
int (*pre_bank_switch)(struct sdw_bus *bus);
int (*post_bank_switch)(struct sdw_bus *bus);
u32 (*read_ping_status)(struct sdw_bus *bus);
+ int (*get_device_num)(struct sdw_bus *bus, struct sdw_slave *slave);
+ void (*put_device_num)(struct sdw_bus *bus, struct sdw_slave *slave);
void (*new_peripheral_assigned)(struct sdw_bus *bus,
struct sdw_slave *slave,
int dev_num);
@@ -898,9 +902,6 @@ struct sdw_master_ops {
* meaningful if multi_link is set. If set to 1, hardware-based
* synchronization will be used even if a stream only uses a single
* SoundWire segment.
- * @dev_num_ida_min: if set, defines the minimum values for the IDA
- * used to allocate system-unique device numbers. This value needs to be
- * identical across all SoundWire bus in the system.
*/
struct sdw_bus {
struct device *dev;
@@ -927,7 +928,6 @@ struct sdw_bus {
u32 bank_switch_timeout;
bool multi_link;
int hw_sync_min_links;
- int dev_num_ida_min;
};
int sdw_bus_master_add(struct sdw_bus *bus, struct device *parent,
--
2.25.1
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