From 4d0e179a42879f7d76a5b95a2e7e7a5afa33954a Mon Sep 17 00:00:00 2001 From: Reka Norman Date: Fri, 25 Aug 2023 12:43:55 +1000 Subject: media: cros-ec-cec: Manage an array of ports To support multiple CEC ports, change cros_ec_cec to contain an array of ports, each with their own CEC adapter, etc. For now, only create a single port and use that port everywhere, so there is no functional change. Support for multiple ports will be added in the following patches. Signed-off-by: Reka Norman Signed-off-by: Hans Verkuil --- include/linux/platform_data/cros_ec_commands.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include') diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h index ab721cf13a98..cb2ddd10a613 100644 --- a/include/linux/platform_data/cros_ec_commands.h +++ b/include/linux/platform_data/cros_ec_commands.h @@ -4436,6 +4436,8 @@ struct ec_response_i2c_passthru_protect { * These commands are for sending and receiving message via HDMI CEC */ +#define EC_CEC_MAX_PORTS 16 + #define MAX_CEC_MSG_LEN 16 /* CEC message from the AP to be written on the CEC bus */ -- cgit From e90bd1fe7cda1aa267fe683e392b4433ec2dc0d3 Mon Sep 17 00:00:00 2001 From: Reka Norman Date: Fri, 25 Aug 2023 12:43:56 +1000 Subject: media: cros-ec-cec: Support multiple ports in set/get host commands Reuse the top four bits of the cmd field to specify the port number. The reason for doing this as opposed to adding a separate uint8_t field is it avoids the need to add new versions of these commands. The change is backwards compatible since these bits were previously always zero, so the default behaviour is to always operate on port 0. Signed-off-by: Reka Norman Signed-off-by: Hans Verkuil --- drivers/media/cec/platform/cros-ec/cros-ec-cec.c | 2 ++ include/linux/platform_data/cros_ec_commands.h | 8 ++++++-- 2 files changed, 8 insertions(+), 2 deletions(-) (limited to 'include') diff --git a/drivers/media/cec/platform/cros-ec/cros-ec-cec.c b/drivers/media/cec/platform/cros-ec/cros-ec-cec.c index d76a25ae0cf1..e969031e1e0e 100644 --- a/drivers/media/cec/platform/cros-ec/cros-ec-cec.c +++ b/drivers/media/cec/platform/cros-ec/cros-ec-cec.c @@ -118,6 +118,7 @@ static int cros_ec_cec_set_log_addr(struct cec_adapter *adap, u8 logical_addr) struct cros_ec_device *cros_ec = cros_ec_cec->cros_ec; struct ec_params_cec_set params = { .cmd = CEC_CMD_LOGICAL_ADDRESS, + .port = port->port_num, .val = logical_addr, }; int ret; @@ -162,6 +163,7 @@ static int cros_ec_cec_adap_enable(struct cec_adapter *adap, bool enable) struct cros_ec_device *cros_ec = cros_ec_cec->cros_ec; struct ec_params_cec_set params = { .cmd = CEC_CMD_ENABLE, + .port = port->port_num, .val = enable, }; int ret; diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h index cb2ddd10a613..e8bb05db360f 100644 --- a/include/linux/platform_data/cros_ec_commands.h +++ b/include/linux/platform_data/cros_ec_commands.h @@ -4457,13 +4457,15 @@ struct ec_params_cec_write { /** * struct ec_params_cec_set - CEC parameters set * @cmd: parameter type, can be CEC_CMD_ENABLE or CEC_CMD_LOGICAL_ADDRESS + * @port: CEC port to set the parameter on * @val: in case cmd is CEC_CMD_ENABLE, this field can be 0 to disable CEC * or 1 to enable CEC functionality, in case cmd is * CEC_CMD_LOGICAL_ADDRESS, this field encodes the requested logical * address between 0 and 15 or 0xff to unregister */ struct ec_params_cec_set { - uint8_t cmd; /* enum cec_command */ + uint8_t cmd : 4; /* enum cec_command */ + uint8_t port : 4; uint8_t val; } __ec_align1; @@ -4473,9 +4475,11 @@ struct ec_params_cec_set { /** * struct ec_params_cec_get - CEC parameters get * @cmd: parameter type, can be CEC_CMD_ENABLE or CEC_CMD_LOGICAL_ADDRESS + * @port: CEC port to get the parameter on */ struct ec_params_cec_get { - uint8_t cmd; /* enum cec_command */ + uint8_t cmd : 4; /* enum cec_command */ + uint8_t port : 4; } __ec_align1; /** -- cgit From adbfc747ddfb48c06d238640e16939916b7a4494 Mon Sep 17 00:00:00 2001 From: Reka Norman Date: Fri, 25 Aug 2023 12:43:57 +1000 Subject: media: cros-ec-cec: Support multiple ports in write command Add a v1 of the CEC write command which contains a port parameter. Check which versions of the write command the EC supports and use the highest supported version. If it only supports v0, check that there is only one port. With v0, the EC will assume all write commands are for port 0. Signed-off-by: Reka Norman Signed-off-by: Hans Verkuil --- drivers/media/cec/platform/cros-ec/cros-ec-cec.c | 54 ++++++++++++++++++++++-- include/linux/platform_data/cros_ec_commands.h | 12 ++++++ 2 files changed, 63 insertions(+), 3 deletions(-) (limited to 'include') diff --git a/drivers/media/cec/platform/cros-ec/cros-ec-cec.c b/drivers/media/cec/platform/cros-ec/cros-ec-cec.c index e969031e1e0e..d674a432dfdd 100644 --- a/drivers/media/cec/platform/cros-ec/cros-ec-cec.c +++ b/drivers/media/cec/platform/cros-ec/cros-ec-cec.c @@ -47,12 +47,14 @@ struct cros_ec_cec_port { * * @cros_ec: Pointer to EC device * @notifier: Notifier info for responding to EC events + * @write_cmd_version: Highest supported version of EC_CMD_CEC_WRITE_MSG. * @num_ports: Number of CEC ports * @ports: Array of ports */ struct cros_ec_cec { struct cros_ec_device *cros_ec; struct notifier_block notifier; + int write_cmd_version; int num_ports; struct cros_ec_cec_port *ports[EC_CEC_MAX_PORTS]; }; @@ -141,12 +143,22 @@ static int cros_ec_cec_transmit(struct cec_adapter *adap, u8 attempts, struct cros_ec_cec *cros_ec_cec = port->cros_ec_cec; struct cros_ec_device *cros_ec = cros_ec_cec->cros_ec; struct ec_params_cec_write params; + struct ec_params_cec_write_v1 params_v1; int ret; - memcpy(params.msg, cec_msg->msg, cec_msg->len); + if (cros_ec_cec->write_cmd_version == 0) { + memcpy(params.msg, cec_msg->msg, cec_msg->len); + ret = cros_ec_cmd(cros_ec, 0, EC_CMD_CEC_WRITE_MSG, ¶ms, + cec_msg->len, NULL, 0); + } else { + params_v1.port = port->port_num; + params_v1.msg_len = cec_msg->len; + memcpy(params_v1.msg, cec_msg->msg, cec_msg->len); + ret = cros_ec_cmd(cros_ec, cros_ec_cec->write_cmd_version, + EC_CMD_CEC_WRITE_MSG, ¶ms_v1, + sizeof(params_v1), NULL, 0); + } - ret = cros_ec_cmd(cros_ec, 0, EC_CMD_CEC_WRITE_MSG, ¶ms, - cec_msg->len, NULL, 0); if (ret < 0) { dev_err(cros_ec->dev, "error writing CEC msg on EC: %d\n", ret); @@ -285,6 +297,38 @@ static struct device *cros_ec_cec_find_hdmi_dev(struct device *dev, #endif +static int cros_ec_cec_get_write_cmd_version(struct cros_ec_cec *cros_ec_cec) +{ + struct cros_ec_device *cros_ec = cros_ec_cec->cros_ec; + struct ec_params_get_cmd_versions_v1 params = { + .cmd = EC_CMD_CEC_WRITE_MSG, + }; + struct ec_response_get_cmd_versions response; + int ret; + + ret = cros_ec_cmd(cros_ec, 1, EC_CMD_GET_CMD_VERSIONS, ¶ms, + sizeof(params), &response, sizeof(response)); + if (ret < 0) { + dev_err(cros_ec->dev, + "error getting CEC write command version: %d\n", ret); + return ret; + } + + if (response.version_mask & EC_VER_MASK(1)) { + cros_ec_cec->write_cmd_version = 1; + } else { + if (cros_ec_cec->num_ports != 1) { + dev_err(cros_ec->dev, + "v0 write command only supports 1 port, %d reported\n", + cros_ec_cec->num_ports); + return -EINVAL; + } + cros_ec_cec->write_cmd_version = 0; + } + + return 0; +} + static int cros_ec_cec_init_port(struct device *dev, struct cros_ec_cec *cros_ec_cec, int port_num, struct device *hdmi_dev, @@ -354,6 +398,10 @@ static int cros_ec_cec_probe(struct platform_device *pdev) cros_ec_cec->num_ports = CEC_NUM_PORTS; + ret = cros_ec_cec_get_write_cmd_version(cros_ec_cec); + if (ret) + return ret; + for (int i = 0; i < cros_ec_cec->num_ports; i++) { ret = cros_ec_cec_init_port(&pdev->dev, cros_ec_cec, i, hdmi_dev, conn); diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h index e8bb05db360f..9a0c6e28f370 100644 --- a/include/linux/platform_data/cros_ec_commands.h +++ b/include/linux/platform_data/cros_ec_commands.h @@ -4451,6 +4451,18 @@ struct ec_params_cec_write { uint8_t msg[MAX_CEC_MSG_LEN]; } __ec_align1; +/** + * struct ec_params_cec_write_v1 - Message to write to the CEC bus + * @port: CEC port to write the message on + * @msg_len: length of msg in bytes + * @msg: message content to write to the CEC bus + */ +struct ec_params_cec_write_v1 { + uint8_t port; + uint8_t msg_len; + uint8_t msg[MAX_CEC_MSG_LEN]; +} __ec_align1; + /* Set various CEC parameters */ #define EC_CMD_CEC_SET 0x00BA -- cgit From 1cabf52639d16428bc0d61028dcaf38e29c5f3b5 Mon Sep 17 00:00:00 2001 From: Reka Norman Date: Fri, 25 Aug 2023 12:43:58 +1000 Subject: media: cros-ec-cec: Support multiple ports in MKBP cec_events Use the top four bits of the cec_events MKBP event to store the port number. Signed-off-by: Reka Norman Signed-off-by: Hans Verkuil --- drivers/media/cec/platform/cros-ec/cros-ec-cec.c | 13 +++++++++++-- include/linux/platform_data/cros_ec_commands.h | 10 ++++++++++ 2 files changed, 21 insertions(+), 2 deletions(-) (limited to 'include') diff --git a/drivers/media/cec/platform/cros-ec/cros-ec-cec.c b/drivers/media/cec/platform/cros-ec/cros-ec-cec.c index d674a432dfdd..18f78b7e034a 100644 --- a/drivers/media/cec/platform/cros-ec/cros-ec-cec.c +++ b/drivers/media/cec/platform/cros-ec/cros-ec-cec.c @@ -77,8 +77,17 @@ static void handle_cec_message(struct cros_ec_cec *cros_ec_cec) static void handle_cec_event(struct cros_ec_cec *cros_ec_cec) { struct cros_ec_device *cros_ec = cros_ec_cec->cros_ec; - uint32_t events = cros_ec->event_data.data.cec_events; - struct cros_ec_cec_port *port = cros_ec_cec->ports[CEC_PORT]; + uint32_t cec_events = cros_ec->event_data.data.cec_events; + uint32_t port_num = EC_MKBP_EVENT_CEC_GET_PORT(cec_events); + uint32_t events = EC_MKBP_EVENT_CEC_GET_EVENTS(cec_events); + struct cros_ec_cec_port *port; + + if (port_num >= cros_ec_cec->num_ports) { + dev_err(cros_ec->dev, + "received CEC event for invalid port %d\n", port_num); + return; + } + port = cros_ec_cec->ports[port_num]; if (events & EC_MKBP_CEC_SEND_OK) cec_transmit_attempt_done(port->adap, CEC_TX_STATUS_OK); diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h index 9a0c6e28f370..b7e8573a8a49 100644 --- a/include/linux/platform_data/cros_ec_commands.h +++ b/include/linux/platform_data/cros_ec_commands.h @@ -4440,6 +4440,16 @@ struct ec_response_i2c_passthru_protect { #define MAX_CEC_MSG_LEN 16 +/* + * Helper macros for packing/unpacking cec_events. + * bits[27:0] : bitmask of events from enum mkbp_cec_event + * bits[31:28]: port number + */ +#define EC_MKBP_EVENT_CEC_PACK(events, port) \ + (((events) & GENMASK(27, 0)) | (((port) & 0xf) << 28)) +#define EC_MKBP_EVENT_CEC_GET_EVENTS(event) ((event) & GENMASK(27, 0)) +#define EC_MKBP_EVENT_CEC_GET_PORT(event) (((event) >> 28) & 0xf) + /* CEC message from the AP to be written on the CEC bus */ #define EC_CMD_CEC_WRITE_MSG 0x00B8 -- cgit From 425d20518c54bc6d66d733fb117a9a4046932d50 Mon Sep 17 00:00:00 2001 From: Reka Norman Date: Fri, 25 Aug 2023 12:43:59 +1000 Subject: media: cros-ec-cec: Support receiving messages from multiple ports Currently, received messages are sent from the EC in the cec_message MKBP event. Since the size of ec_response_get_next_data_v1 is 16 bytes, which is also the maximum size of a CEC message, there is no space to add a port parameter. Increasing the size of ec_response_get_next_data_v1 is an option, but this would increase EC-kernel traffic for all MKBP event types. Instead, use an event to notify that data is ready, and add a new read command to read the data. For backwards compatibility with old EC firmware, continue to handle cec_message events as well. Signed-off-by: Reka Norman Signed-off-by: Hans Verkuil --- drivers/media/cec/platform/cros-ec/cros-ec-cec.c | 59 +++++++++++++++++++++--- include/linux/platform_data/cros_ec_commands.h | 23 +++++++++ 2 files changed, 76 insertions(+), 6 deletions(-) (limited to 'include') diff --git a/drivers/media/cec/platform/cros-ec/cros-ec-cec.c b/drivers/media/cec/platform/cros-ec/cros-ec-cec.c index 18f78b7e034a..6989e63c05be 100644 --- a/drivers/media/cec/platform/cros-ec/cros-ec-cec.c +++ b/drivers/media/cec/platform/cros-ec/cros-ec-cec.c @@ -59,19 +59,63 @@ struct cros_ec_cec { struct cros_ec_cec_port *ports[EC_CEC_MAX_PORTS]; }; +static void cros_ec_cec_received_message(struct cros_ec_cec_port *port, + uint8_t *msg, uint8_t len) +{ + if (len > CEC_MAX_MSG_SIZE) + len = CEC_MAX_MSG_SIZE; + + port->rx_msg.len = len; + memcpy(port->rx_msg.msg, msg, len); + + cec_received_msg(port->adap, &port->rx_msg); +} + static void handle_cec_message(struct cros_ec_cec *cros_ec_cec) { struct cros_ec_device *cros_ec = cros_ec_cec->cros_ec; uint8_t *cec_message = cros_ec->event_data.data.cec_message; unsigned int len = cros_ec->event_size; - struct cros_ec_cec_port *port = cros_ec_cec->ports[CEC_PORT]; + struct cros_ec_cec_port *port; + /* + * There are two ways of receiving CEC messages: + * 1. Old EC firmware which only supports one port sends the data in a + * cec_message MKBP event. + * 2. New EC firmware which supports multiple ports uses + * EC_MKBP_CEC_HAVE_DATA to notify that data is ready and + * EC_CMD_CEC_READ_MSG to read it. + * Check that the EC only has one CEC port, and then we can assume the + * message is from port 0. + */ + if (cros_ec_cec->num_ports != 1) { + dev_err(cros_ec->dev, + "received cec_message on device with %d ports\n", + cros_ec_cec->num_ports); + return; + } + port = cros_ec_cec->ports[0]; - if (len > CEC_MAX_MSG_SIZE) - len = CEC_MAX_MSG_SIZE; - port->rx_msg.len = len; - memcpy(port->rx_msg.msg, cec_message, len); + cros_ec_cec_received_message(port, cec_message, len); +} - cec_received_msg(port->adap, &port->rx_msg); +static void cros_ec_cec_read_message(struct cros_ec_cec_port *port) +{ + struct cros_ec_device *cros_ec = port->cros_ec_cec->cros_ec; + struct ec_params_cec_read params = { + .port = port->port_num, + }; + struct ec_response_cec_read response; + int ret; + + ret = cros_ec_cmd(cros_ec, 0, EC_CMD_CEC_READ_MSG, ¶ms, + sizeof(params), &response, sizeof(response)); + if (ret < 0) { + dev_err(cros_ec->dev, + "error reading CEC message on EC: %d\n", ret); + return; + } + + cros_ec_cec_received_message(port, response.msg, response.msg_len); } static void handle_cec_event(struct cros_ec_cec *cros_ec_cec) @@ -97,6 +141,9 @@ static void handle_cec_event(struct cros_ec_cec *cros_ec_cec) cec_transmit_attempt_done(port->adap, CEC_TX_STATUS_MAX_RETRIES | CEC_TX_STATUS_NACK); + + if (events & EC_MKBP_CEC_HAVE_DATA) + cros_ec_cec_read_message(port); } static int cros_ec_cec_event(struct notifier_block *nb, diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h index b7e8573a8a49..ad61c7ff0b28 100644 --- a/include/linux/platform_data/cros_ec_commands.h +++ b/include/linux/platform_data/cros_ec_commands.h @@ -4473,6 +4473,27 @@ struct ec_params_cec_write_v1 { uint8_t msg[MAX_CEC_MSG_LEN]; } __ec_align1; +/* CEC message read from a CEC bus reported back to the AP */ +#define EC_CMD_CEC_READ_MSG 0x00B9 + +/** + * struct ec_params_cec_read - Read a message from the CEC bus + * @port: CEC port to read a message on + */ +struct ec_params_cec_read { + uint8_t port; +} __ec_align1; + +/** + * struct ec_response_cec_read - Message read from the CEC bus + * @msg_len: length of msg in bytes + * @msg: message content read from the CEC bus + */ +struct ec_response_cec_read { + uint8_t msg_len; + uint8_t msg[MAX_CEC_MSG_LEN]; +} __ec_align1; + /* Set various CEC parameters */ #define EC_CMD_CEC_SET 0x00BA @@ -4529,6 +4550,8 @@ enum mkbp_cec_event { EC_MKBP_CEC_SEND_OK = BIT(0), /* Outgoing message was not acknowledged */ EC_MKBP_CEC_SEND_FAILED = BIT(1), + /* Incoming message can be read out by AP */ + EC_MKBP_CEC_HAVE_DATA = BIT(2), }; /*****************************************************************************/ -- cgit From 5d227f02ceb9cc120cf04efbd77e12da182a5f62 Mon Sep 17 00:00:00 2001 From: Reka Norman Date: Fri, 25 Aug 2023 12:44:01 +1000 Subject: media: cros-ec-cec: Get number of CEC ports from EC Add a new CEC port count host command and use it to query the number of CEC ports from the EC. If the host command is not supported then it must be old EC firmware which only supports one port, so fall back to assuming one port. This patch completes support for multiple ports in cros-ec-cec. Signed-off-by: Reka Norman Signed-off-by: Hans Verkuil --- drivers/media/cec/platform/cros-ec/cros-ec-cec.c | 40 +++++++++++++++++++++--- include/linux/platform_data/cros_ec_commands.h | 11 +++++++ 2 files changed, 46 insertions(+), 5 deletions(-) (limited to 'include') diff --git a/drivers/media/cec/platform/cros-ec/cros-ec-cec.c b/drivers/media/cec/platform/cros-ec/cros-ec-cec.c index 371699d599de..993deb85d3e2 100644 --- a/drivers/media/cec/platform/cros-ec/cros-ec-cec.c +++ b/drivers/media/cec/platform/cros-ec/cros-ec-cec.c @@ -21,10 +21,6 @@ #define DRV_NAME "cros-ec-cec" -/* Only one port is supported for now */ -#define CEC_NUM_PORTS 1 -#define CEC_PORT 0 - /** * struct cros_ec_cec_port - Driver data for a single EC CEC port * @@ -358,6 +354,38 @@ static struct device *cros_ec_cec_find_hdmi_dev(struct device *dev, #endif +static int cros_ec_cec_get_num_ports(struct cros_ec_cec *cros_ec_cec) +{ + struct ec_response_cec_port_count response; + int ret; + + ret = cros_ec_cmd(cros_ec_cec->cros_ec, 0, EC_CMD_CEC_PORT_COUNT, NULL, + 0, &response, sizeof(response)); + if (ret < 0) { + /* + * Old EC firmware only supports one port and does not support + * the port count command, so fall back to assuming one port. + */ + cros_ec_cec->num_ports = 1; + return 0; + } + + if (response.port_count == 0) { + dev_err(cros_ec_cec->cros_ec->dev, + "EC reports 0 CEC ports\n"); + return -ENODEV; + } + + if (response.port_count > EC_CEC_MAX_PORTS) { + dev_err(cros_ec_cec->cros_ec->dev, + "EC reports too many ports: %d\n", response.port_count); + return -EINVAL; + } + + cros_ec_cec->num_ports = response.port_count; + return 0; +} + static int cros_ec_cec_get_write_cmd_version(struct cros_ec_cec *cros_ec_cec) { struct cros_ec_device *cros_ec = cros_ec_cec->cros_ec; @@ -463,7 +491,9 @@ static int cros_ec_cec_probe(struct platform_device *pdev) device_init_wakeup(&pdev->dev, 1); - cros_ec_cec->num_ports = CEC_NUM_PORTS; + ret = cros_ec_cec_get_num_ports(cros_ec_cec); + if (ret) + return ret; ret = cros_ec_cec_get_write_cmd_version(cros_ec_cec); if (ret) diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h index ad61c7ff0b28..7dae17b62a4d 100644 --- a/include/linux/platform_data/cros_ec_commands.h +++ b/include/linux/platform_data/cros_ec_commands.h @@ -4536,6 +4536,17 @@ struct ec_response_cec_get { uint8_t val; } __ec_align1; +/* Get the number of CEC ports */ +#define EC_CMD_CEC_PORT_COUNT 0x00C1 + +/** + * struct ec_response_cec_port_count - CEC port count response + * @port_count: number of CEC ports + */ +struct ec_response_cec_port_count { + uint8_t port_count; +} __ec_align1; + /* CEC parameters command */ enum cec_command { /* CEC reading, writing and events enable */ -- cgit From b97213a41140b87f48865ba594a1f4b5c5566631 Mon Sep 17 00:00:00 2001 From: Sakari Ailus Date: Wed, 23 Aug 2023 12:03:42 +0300 Subject: media: v4l2-mc: Make v4l2_pipeline_pm_{get,put} deprecated The v4l2_pipeline_pm_get() and v4l2_pipeline_pm_put() functions were needed to control sub-devices' power states before runtime PM. These functions should no longer be used, and instead sub-device drivers should use runtime PM. Signed-off-by: Sakari Ailus Reviewed-by: Laurent Pinchart Signed-off-by: Hans Verkuil --- include/media/v4l2-mc.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include') diff --git a/include/media/v4l2-mc.h b/include/media/v4l2-mc.h index b39586dfba35..ed0a44b6eada 100644 --- a/include/media/v4l2-mc.h +++ b/include/media/v4l2-mc.h @@ -143,6 +143,9 @@ int v4l2_create_fwnode_links(struct v4l2_subdev *src_sd, * v4l2_pipeline_pm_get - Increase the use count of a pipeline * @entity: The root entity of a pipeline * + * THIS FUNCTION IS DEPRECATED. DO NOT USE IN NEW DRIVERS. USE RUNTIME PM + * ON SUB-DEVICE DRIVERS INSTEAD. + * * Update the use count of all entities in the pipeline and power entities on. * * This function is intended to be called in video node open. It uses @@ -157,6 +160,9 @@ int v4l2_pipeline_pm_get(struct media_entity *entity); * v4l2_pipeline_pm_put - Decrease the use count of a pipeline * @entity: The root entity of a pipeline * + * THIS FUNCTION IS DEPRECATED. DO NOT USE IN NEW DRIVERS. USE RUNTIME PM + * ON SUB-DEVICE DRIVERS INSTEAD. + * * Update the use count of all entities in the pipeline and power entities off. * * This function is intended to be called in video node release. It uses -- cgit From da7e34e558a522d4a71660a165815979b1397074 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Fri, 18 Aug 2023 18:55:18 +0300 Subject: media: v4l2-subdev: Document that routing support depends on streams Routing support, through the subdev .set_routing() operation, requires the subdev to support streams. This is however not clearly documented anywhere. Fix it by expanding the operation's documentation to indicate that subdevs must set the V4L2_SUBDEV_FL_STREAMS flag. Signed-off-by: Laurent Pinchart Reviewed-by: Tomi Valkeinen Signed-off-by: Sakari Ailus Signed-off-by: Hans Verkuil --- include/media/v4l2-subdev.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'include') diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index d9fca929c10b..820e38ec3dc9 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -822,8 +822,9 @@ struct v4l2_subdev_state { * operation shall fail if the pad index it has been called on * is not valid or in case of unrecoverable failures. * - * @set_routing: enable or disable data connection routes described in the - * subdevice routing table. + * @set_routing: Enable or disable data connection routes described in the + * subdevice routing table. Subdevs that implement this operation + * must set the V4L2_SUBDEV_FL_STREAMS flag. * * @enable_streams: Enable the streams defined in streams_mask on the given * source pad. Subdevs that implement this operation must use the active -- cgit From 009905ec50433259c05f474251000b040098564e Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Mon, 18 Sep 2023 15:48:38 +0300 Subject: media: v4l2-subdev: Document and enforce .s_stream() requirements The subdev .s_stream() operation must not be called to start an already started subdev, or stop an already stopped one. This requirement has never been formally documented. Fix it, and catch possible offenders with a WARN_ON() in the call_s_stream() wrapper. Signed-off-by: Laurent Pinchart Signed-off-by: Sakari Ailus Signed-off-by: Hans Verkuil --- drivers/media/v4l2-core/v4l2-subdev.c | 17 ++++++++++++++++- include/media/v4l2-subdev.h | 4 +++- 2 files changed, 19 insertions(+), 2 deletions(-) (limited to 'include') diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c index b92348ad61f6..32b7d9cd43e6 100644 --- a/drivers/media/v4l2-core/v4l2-subdev.c +++ b/drivers/media/v4l2-core/v4l2-subdev.c @@ -359,6 +359,18 @@ static int call_s_stream(struct v4l2_subdev *sd, int enable) { int ret; + /* + * The .s_stream() operation must never be called to start or stop an + * already started or stopped subdev. Catch offenders but don't return + * an error yet to avoid regressions. + * + * As .s_stream() is mutually exclusive with the .enable_streams() and + * .disable_streams() operation, we can use the enabled_streams field + * to store the subdev streaming state. + */ + if (WARN_ON(!!sd->enabled_streams == !!enable)) + return 0; + #if IS_REACHABLE(CONFIG_LEDS_CLASS) if (!IS_ERR_OR_NULL(sd->privacy_led)) { if (enable) @@ -372,9 +384,12 @@ static int call_s_stream(struct v4l2_subdev *sd, int enable) if (!enable && ret < 0) { dev_warn(sd->dev, "disabling streaming failed (%d)\n", ret); - return 0; + ret = 0; } + if (!ret) + sd->enabled_streams = enable ? BIT(0) : 0; + return ret; } diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index 820e38ec3dc9..5f59ff0796b7 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -446,7 +446,9 @@ enum v4l2_subdev_pre_streamon_flags { * @s_stream: start (enabled == 1) or stop (enabled == 0) streaming on the * sub-device. Failure on stop will remove any resources acquired in * streaming start, while the error code is still returned by the driver. - * Also see call_s_stream wrapper in v4l2-subdev.c. + * The caller shall track the subdev state, and shall not start or stop an + * already started or stopped subdev. Also see call_s_stream wrapper in + * v4l2-subdev.c. * * @g_pixelaspect: callback to return the pixelaspect ratio. * -- cgit From 2a2fffb488a3c5ea9c06d0b572c90c4aa78709b6 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sun, 13 Aug 2023 10:22:54 +0200 Subject: media: remove the old videobuf framework The last driver that still used this old framework has been converted to the videobuf2 framework. So it is now time to delete the old videobuf code. Signed-off-by: Hans Verkuil Reviewed-by: Hans de Goede --- Documentation/driver-api/media/v4l2-core.rst | 1 - Documentation/driver-api/media/v4l2-dev.rst | 8 - Documentation/driver-api/media/v4l2-videobuf.rst | 403 ------- .../zh_CN/video4linux/v4l2-framework.txt | 12 - drivers/media/v4l2-core/Kconfig | 16 - drivers/media/v4l2-core/Makefile | 5 - drivers/media/v4l2-core/videobuf-core.c | 1198 -------------------- drivers/media/v4l2-core/videobuf-dma-contig.c | 402 ------- drivers/media/v4l2-core/videobuf-dma-sg.c | 681 ----------- drivers/media/v4l2-core/videobuf-vmalloc.c | 326 ------ include/media/videobuf-core.h | 233 ---- include/media/videobuf-dma-contig.h | 30 - include/media/videobuf-dma-sg.h | 102 -- include/media/videobuf-vmalloc.h | 43 - 14 files changed, 3460 deletions(-) delete mode 100644 Documentation/driver-api/media/v4l2-videobuf.rst delete mode 100644 drivers/media/v4l2-core/videobuf-core.c delete mode 100644 drivers/media/v4l2-core/videobuf-dma-contig.c delete mode 100644 drivers/media/v4l2-core/videobuf-dma-sg.c delete mode 100644 drivers/media/v4l2-core/videobuf-vmalloc.c delete mode 100644 include/media/videobuf-core.h delete mode 100644 include/media/videobuf-dma-contig.h delete mode 100644 include/media/videobuf-dma-sg.h delete mode 100644 include/media/videobuf-vmalloc.h (limited to 'include') diff --git a/Documentation/driver-api/media/v4l2-core.rst b/Documentation/driver-api/media/v4l2-core.rst index 239045ecc8f4..58cba831ade5 100644 --- a/Documentation/driver-api/media/v4l2-core.rst +++ b/Documentation/driver-api/media/v4l2-core.rst @@ -13,7 +13,6 @@ Video4Linux devices v4l2-subdev v4l2-event v4l2-controls - v4l2-videobuf v4l2-videobuf2 v4l2-dv-timings v4l2-flash-led-class diff --git a/Documentation/driver-api/media/v4l2-dev.rst b/Documentation/driver-api/media/v4l2-dev.rst index 99e3b5fa7444..d5cb19b21a9f 100644 --- a/Documentation/driver-api/media/v4l2-dev.rst +++ b/Documentation/driver-api/media/v4l2-dev.rst @@ -157,14 +157,6 @@ changing the e.g. exposure of the webcam. Of course, you can always do all the locking yourself by leaving both lock pointers at ``NULL``. -If you use the old :ref:`videobuf framework ` then you must -pass the :c:type:`video_device`->lock to the videobuf queue initialize -function: if videobuf has to wait for a frame to arrive, then it will -temporarily unlock the lock and relock it afterwards. If your driver also -waits in the code, then you should do the same to allow other -processes to access the device node while the first process is waiting for -something. - In the case of :ref:`videobuf2 ` you will need to implement the ``wait_prepare()`` and ``wait_finish()`` callbacks to unlock/lock if applicable. If you use the ``queue->lock`` pointer, then you can use the helper functions diff --git a/Documentation/driver-api/media/v4l2-videobuf.rst b/Documentation/driver-api/media/v4l2-videobuf.rst deleted file mode 100644 index 4b1d84eefeb8..000000000000 --- a/Documentation/driver-api/media/v4l2-videobuf.rst +++ /dev/null @@ -1,403 +0,0 @@ -.. SPDX-License-Identifier: GPL-2.0 - -.. _vb_framework: - -Videobuf Framework -================== - -Author: Jonathan Corbet - -Current as of 2.6.33 - -.. note:: - - The videobuf framework was deprecated in favor of videobuf2. Shouldn't - be used on new drivers. - -Introduction ------------- - -The videobuf layer functions as a sort of glue layer between a V4L2 driver -and user space. It handles the allocation and management of buffers for -the storage of video frames. There is a set of functions which can be used -to implement many of the standard POSIX I/O system calls, including read(), -poll(), and, happily, mmap(). Another set of functions can be used to -implement the bulk of the V4L2 ioctl() calls related to streaming I/O, -including buffer allocation, queueing and dequeueing, and streaming -control. Using videobuf imposes a few design decisions on the driver -author, but the payback comes in the form of reduced code in the driver and -a consistent implementation of the V4L2 user-space API. - -Buffer types ------------- - -Not all video devices use the same kind of buffers. In fact, there are (at -least) three common variations: - - - Buffers which are scattered in both the physical and (kernel) virtual - address spaces. (Almost) all user-space buffers are like this, but it - makes great sense to allocate kernel-space buffers this way as well when - it is possible. Unfortunately, it is not always possible; working with - this kind of buffer normally requires hardware which can do - scatter/gather DMA operations. - - - Buffers which are physically scattered, but which are virtually - contiguous; buffers allocated with vmalloc(), in other words. These - buffers are just as hard to use for DMA operations, but they can be - useful in situations where DMA is not available but virtually-contiguous - buffers are convenient. - - - Buffers which are physically contiguous. Allocation of this kind of - buffer can be unreliable on fragmented systems, but simpler DMA - controllers cannot deal with anything else. - -Videobuf can work with all three types of buffers, but the driver author -must pick one at the outset and design the driver around that decision. - -[It's worth noting that there's a fourth kind of buffer: "overlay" buffers -which are located within the system's video memory. The overlay -functionality is considered to be deprecated for most use, but it still -shows up occasionally in system-on-chip drivers where the performance -benefits merit the use of this technique. Overlay buffers can be handled -as a form of scattered buffer, but there are very few implementations in -the kernel and a description of this technique is currently beyond the -scope of this document.] - -Data structures, callbacks, and initialization ----------------------------------------------- - -Depending on which type of buffers are being used, the driver should -include one of the following files: - -.. code-block:: none - - /* Physically scattered */ - /* vmalloc() buffers */ - /* Physically contiguous */ - -The driver's data structure describing a V4L2 device should include a -struct videobuf_queue instance for the management of the buffer queue, -along with a list_head for the queue of available buffers. There will also -need to be an interrupt-safe spinlock which is used to protect (at least) -the queue. - -The next step is to write four simple callbacks to help videobuf deal with -the management of buffers: - -.. code-block:: none - - struct videobuf_queue_ops { - int (*buf_setup)(struct videobuf_queue *q, - unsigned int *count, unsigned int *size); - int (*buf_prepare)(struct videobuf_queue *q, - struct videobuf_buffer *vb, - enum v4l2_field field); - void (*buf_queue)(struct videobuf_queue *q, - struct videobuf_buffer *vb); - void (*buf_release)(struct videobuf_queue *q, - struct videobuf_buffer *vb); - }; - -buf_setup() is called early in the I/O process, when streaming is being -initiated; its purpose is to tell videobuf about the I/O stream. The count -parameter will be a suggested number of buffers to use; the driver should -check it for rationality and adjust it if need be. As a practical rule, a -minimum of two buffers are needed for proper streaming, and there is -usually a maximum (which cannot exceed 32) which makes sense for each -device. The size parameter should be set to the expected (maximum) size -for each frame of data. - -Each buffer (in the form of a struct videobuf_buffer pointer) will be -passed to buf_prepare(), which should set the buffer's size, width, height, -and field fields properly. If the buffer's state field is -VIDEOBUF_NEEDS_INIT, the driver should pass it to: - -.. code-block:: none - - int videobuf_iolock(struct videobuf_queue* q, struct videobuf_buffer *vb, - struct v4l2_framebuffer *fbuf); - -Among other things, this call will usually allocate memory for the buffer. -Finally, the buf_prepare() function should set the buffer's state to -VIDEOBUF_PREPARED. - -When a buffer is queued for I/O, it is passed to buf_queue(), which should -put it onto the driver's list of available buffers and set its state to -VIDEOBUF_QUEUED. Note that this function is called with the queue spinlock -held; if it tries to acquire it as well things will come to a screeching -halt. Yes, this is the voice of experience. Note also that videobuf may -wait on the first buffer in the queue; placing other buffers in front of it -could again gum up the works. So use list_add_tail() to enqueue buffers. - -Finally, buf_release() is called when a buffer is no longer intended to be -used. The driver should ensure that there is no I/O active on the buffer, -then pass it to the appropriate free routine(s): - -.. code-block:: none - - /* Scatter/gather drivers */ - int videobuf_dma_unmap(struct videobuf_queue *q, - struct videobuf_dmabuf *dma); - int videobuf_dma_free(struct videobuf_dmabuf *dma); - - /* vmalloc drivers */ - void videobuf_vmalloc_free (struct videobuf_buffer *buf); - - /* Contiguous drivers */ - void videobuf_dma_contig_free(struct videobuf_queue *q, - struct videobuf_buffer *buf); - -One way to ensure that a buffer is no longer under I/O is to pass it to: - -.. code-block:: none - - int videobuf_waiton(struct videobuf_buffer *vb, int non_blocking, int intr); - -Here, vb is the buffer, non_blocking indicates whether non-blocking I/O -should be used (it should be zero in the buf_release() case), and intr -controls whether an interruptible wait is used. - -File operations ---------------- - -At this point, much of the work is done; much of the rest is slipping -videobuf calls into the implementation of the other driver callbacks. The -first step is in the open() function, which must initialize the -videobuf queue. The function to use depends on the type of buffer used: - -.. code-block:: none - - void videobuf_queue_sg_init(struct videobuf_queue *q, - struct videobuf_queue_ops *ops, - struct device *dev, - spinlock_t *irqlock, - enum v4l2_buf_type type, - enum v4l2_field field, - unsigned int msize, - void *priv); - - void videobuf_queue_vmalloc_init(struct videobuf_queue *q, - struct videobuf_queue_ops *ops, - struct device *dev, - spinlock_t *irqlock, - enum v4l2_buf_type type, - enum v4l2_field field, - unsigned int msize, - void *priv); - - void videobuf_queue_dma_contig_init(struct videobuf_queue *q, - struct videobuf_queue_ops *ops, - struct device *dev, - spinlock_t *irqlock, - enum v4l2_buf_type type, - enum v4l2_field field, - unsigned int msize, - void *priv); - -In each case, the parameters are the same: q is the queue structure for the -device, ops is the set of callbacks as described above, dev is the device -structure for this video device, irqlock is an interrupt-safe spinlock to -protect access to the data structures, type is the buffer type used by the -device (cameras will use V4L2_BUF_TYPE_VIDEO_CAPTURE, for example), field -describes which field is being captured (often V4L2_FIELD_NONE for -progressive devices), msize is the size of any containing structure used -around struct videobuf_buffer, and priv is a private data pointer which -shows up in the priv_data field of struct videobuf_queue. Note that these -are void functions which, evidently, are immune to failure. - -V4L2 capture drivers can be written to support either of two APIs: the -read() system call and the rather more complicated streaming mechanism. As -a general rule, it is necessary to support both to ensure that all -applications have a chance of working with the device. Videobuf makes it -easy to do that with the same code. To implement read(), the driver need -only make a call to one of: - -.. code-block:: none - - ssize_t videobuf_read_one(struct videobuf_queue *q, - char __user *data, size_t count, - loff_t *ppos, int nonblocking); - - ssize_t videobuf_read_stream(struct videobuf_queue *q, - char __user *data, size_t count, - loff_t *ppos, int vbihack, int nonblocking); - -Either one of these functions will read frame data into data, returning the -amount actually read; the difference is that videobuf_read_one() will only -read a single frame, while videobuf_read_stream() will read multiple frames -if they are needed to satisfy the count requested by the application. A -typical driver read() implementation will start the capture engine, call -one of the above functions, then stop the engine before returning (though a -smarter implementation might leave the engine running for a little while in -anticipation of another read() call happening in the near future). - -The poll() function can usually be implemented with a direct call to: - -.. code-block:: none - - unsigned int videobuf_poll_stream(struct file *file, - struct videobuf_queue *q, - poll_table *wait); - -Note that the actual wait queue eventually used will be the one associated -with the first available buffer. - -When streaming I/O is done to kernel-space buffers, the driver must support -the mmap() system call to enable user space to access the data. In many -V4L2 drivers, the often-complex mmap() implementation simplifies to a -single call to: - -.. code-block:: none - - int videobuf_mmap_mapper(struct videobuf_queue *q, - struct vm_area_struct *vma); - -Everything else is handled by the videobuf code. - -The release() function requires two separate videobuf calls: - -.. code-block:: none - - void videobuf_stop(struct videobuf_queue *q); - int videobuf_mmap_free(struct videobuf_queue *q); - -The call to videobuf_stop() terminates any I/O in progress - though it is -still up to the driver to stop the capture engine. The call to -videobuf_mmap_free() will ensure that all buffers have been unmapped; if -so, they will all be passed to the buf_release() callback. If buffers -remain mapped, videobuf_mmap_free() returns an error code instead. The -purpose is clearly to cause the closing of the file descriptor to fail if -buffers are still mapped, but every driver in the 2.6.32 kernel cheerfully -ignores its return value. - -ioctl() operations ------------------- - -The V4L2 API includes a very long list of driver callbacks to respond to -the many ioctl() commands made available to user space. A number of these -- those associated with streaming I/O - turn almost directly into videobuf -calls. The relevant helper functions are: - -.. code-block:: none - - int videobuf_reqbufs(struct videobuf_queue *q, - struct v4l2_requestbuffers *req); - int videobuf_querybuf(struct videobuf_queue *q, struct v4l2_buffer *b); - int videobuf_qbuf(struct videobuf_queue *q, struct v4l2_buffer *b); - int videobuf_dqbuf(struct videobuf_queue *q, struct v4l2_buffer *b, - int nonblocking); - int videobuf_streamon(struct videobuf_queue *q); - int videobuf_streamoff(struct videobuf_queue *q); - -So, for example, a VIDIOC_REQBUFS call turns into a call to the driver's -vidioc_reqbufs() callback which, in turn, usually only needs to locate the -proper struct videobuf_queue pointer and pass it to videobuf_reqbufs(). -These support functions can replace a great deal of buffer management -boilerplate in a lot of V4L2 drivers. - -The vidioc_streamon() and vidioc_streamoff() functions will be a bit more -complex, of course, since they will also need to deal with starting and -stopping the capture engine. - -Buffer allocation ------------------ - -Thus far, we have talked about buffers, but have not looked at how they are -allocated. The scatter/gather case is the most complex on this front. For -allocation, the driver can leave buffer allocation entirely up to the -videobuf layer; in this case, buffers will be allocated as anonymous -user-space pages and will be very scattered indeed. If the application is -using user-space buffers, no allocation is needed; the videobuf layer will -take care of calling get_user_pages() and filling in the scatterlist array. - -If the driver needs to do its own memory allocation, it should be done in -the vidioc_reqbufs() function, *after* calling videobuf_reqbufs(). The -first step is a call to: - -.. code-block:: none - - struct videobuf_dmabuf *videobuf_to_dma(struct videobuf_buffer *buf); - -The returned videobuf_dmabuf structure (defined in -) includes a couple of relevant fields: - -.. code-block:: none - - struct scatterlist *sglist; - int sglen; - -The driver must allocate an appropriately-sized scatterlist array and -populate it with pointers to the pieces of the allocated buffer; sglen -should be set to the length of the array. - -Drivers using the vmalloc() method need not (and cannot) concern themselves -with buffer allocation at all; videobuf will handle those details. The -same is normally true of contiguous-DMA drivers as well; videobuf will -allocate the buffers (with dma_alloc_coherent()) when it sees fit. That -means that these drivers may be trying to do high-order allocations at any -time, an operation which is not always guaranteed to work. Some drivers -play tricks by allocating DMA space at system boot time; videobuf does not -currently play well with those drivers. - -As of 2.6.31, contiguous-DMA drivers can work with a user-supplied buffer, -as long as that buffer is physically contiguous. Normal user-space -allocations will not meet that criterion, but buffers obtained from other -kernel drivers, or those contained within huge pages, will work with these -drivers. - -Filling the buffers -------------------- - -The final part of a videobuf implementation has no direct callback - it's -the portion of the code which actually puts frame data into the buffers, -usually in response to interrupts from the device. For all types of -drivers, this process works approximately as follows: - - - Obtain the next available buffer and make sure that somebody is actually - waiting for it. - - - Get a pointer to the memory and put video data there. - - - Mark the buffer as done and wake up the process waiting for it. - -Step (1) above is done by looking at the driver-managed list_head structure -- the one which is filled in the buf_queue() callback. Because starting -the engine and enqueueing buffers are done in separate steps, it's possible -for the engine to be running without any buffers available - in the -vmalloc() case especially. So the driver should be prepared for the list -to be empty. It is equally possible that nobody is yet interested in the -buffer; the driver should not remove it from the list or fill it until a -process is waiting on it. That test can be done by examining the buffer's -done field (a wait_queue_head_t structure) with waitqueue_active(). - -A buffer's state should be set to VIDEOBUF_ACTIVE before being mapped for -DMA; that ensures that the videobuf layer will not try to do anything with -it while the device is transferring data. - -For scatter/gather drivers, the needed memory pointers will be found in the -scatterlist structure described above. Drivers using the vmalloc() method -can get a memory pointer with: - -.. code-block:: none - - void *videobuf_to_vmalloc(struct videobuf_buffer *buf); - -For contiguous DMA drivers, the function to use is: - -.. code-block:: none - - dma_addr_t videobuf_to_dma_contig(struct videobuf_buffer *buf); - -The contiguous DMA API goes out of its way to hide the kernel-space address -of the DMA buffer from drivers. - -The final step is to set the size field of the relevant videobuf_buffer -structure to the actual size of the captured image, set state to -VIDEOBUF_DONE, then call wake_up() on the done queue. At this point, the -buffer is owned by the videobuf layer and the driver should not touch it -again. - -Developers who are interested in more information can go into the relevant -header files; there are a few low-level functions declared there which have -not been talked about here. Note also that all of these calls are exported -GPL-only, so they will not be available to non-GPL kernel modules. diff --git a/Documentation/translations/zh_CN/video4linux/v4l2-framework.txt b/Documentation/translations/zh_CN/video4linux/v4l2-framework.txt index a88fcbc11eca..9cc97ec75d7a 100644 --- a/Documentation/translations/zh_CN/video4linux/v4l2-framework.txt +++ b/Documentation/translations/zh_CN/video4linux/v4l2-framework.txt @@ -768,18 +768,6 @@ const char *video_device_node_name(struct video_device *vdev); 此功能，而非访问 video_device::num 和 video_device::minor 域。 -视频缓冲辅助函数 ---------------- - -v4l2 核心 API 提供了一个处理视频缓冲的标准方法(称为“videobuf”)。 -这些方法使驱动可以通过统一的方式实现 read()、mmap() 和 overlay()。 -目前在设备上支持视频缓冲的方法有分散/聚集 DMA(videobuf-dma-sg)、 -线性 DMA(videobuf-dma-contig)以及大多用于 USB 设备的用 vmalloc -分配的缓冲(videobuf-vmalloc)。 - -请参阅 Documentation/driver-api/media/v4l2-videobuf.rst，以获得更多关于 videobuf -层的使用信息。 - v4l2_fh 结构体 ------------- diff --git a/drivers/media/v4l2-core/Kconfig b/drivers/media/v4l2-core/Kconfig index f77ebd688cde..331b8e535e5b 100644 --- a/drivers/media/v4l2-core/Kconfig +++ b/drivers/media/v4l2-core/Kconfig @@ -82,19 +82,3 @@ config V4L2_CCI_I2C depends on I2C select REGMAP_I2C select V4L2_CCI - -# Used by drivers that need Videobuf modules -config VIDEOBUF_GEN - tristate - -config VIDEOBUF_DMA_SG - tristate - select VIDEOBUF_GEN - -config VIDEOBUF_VMALLOC - tristate - select VIDEOBUF_GEN - -config VIDEOBUF_DMA_CONTIG - tristate - select VIDEOBUF_GEN diff --git a/drivers/media/v4l2-core/Makefile b/drivers/media/v4l2-core/Makefile index be2551705755..2177b9d63a8f 100644 --- a/drivers/media/v4l2-core/Makefile +++ b/drivers/media/v4l2-core/Makefile @@ -33,10 +33,5 @@ obj-$(CONFIG_V4L2_JPEG_HELPER) += v4l2-jpeg.o obj-$(CONFIG_V4L2_MEM2MEM_DEV) += v4l2-mem2mem.o obj-$(CONFIG_V4L2_VP9) += v4l2-vp9.o -obj-$(CONFIG_VIDEOBUF_DMA_CONTIG) += videobuf-dma-contig.o -obj-$(CONFIG_VIDEOBUF_DMA_SG) += videobuf-dma-sg.o -obj-$(CONFIG_VIDEOBUF_GEN) += videobuf-core.o -obj-$(CONFIG_VIDEOBUF_VMALLOC) += videobuf-vmalloc.o - obj-$(CONFIG_VIDEO_TUNER) += tuner.o obj-$(CONFIG_VIDEO_DEV) += v4l2-dv-timings.o videodev.o diff --git a/drivers/media/v4l2-core/videobuf-core.c b/drivers/media/v4l2-core/videobuf-core.c deleted file mode 100644 index 606a271bdd2d..000000000000 --- a/drivers/media/v4l2-core/videobuf-core.c +++ /dev/null @@ -1,1198 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * generic helper functions for handling video4linux capture buffers - * - * (c) 2007 Mauro Carvalho Chehab, - * - * Highly based on video-buf written originally by: - * (c) 2001,02 Gerd Knorr - * (c) 2006 Mauro Carvalho Chehab, - * (c) 2006 Ted Walther and John Sokol - */ - -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -#define MAGIC_BUFFER 0x20070728 -#define MAGIC_CHECK(is, should) \ - do { \ - if (unlikely((is) != (should))) { \ - printk(KERN_ERR \ - "magic mismatch: %x (expected %x)\n", \ - is, should); \ - BUG(); \ - } \ - } while (0) - -static int debug; -module_param(debug, int, 0644); - -MODULE_DESCRIPTION("helper module to manage video4linux buffers"); -MODULE_AUTHOR("Mauro Carvalho Chehab "); -MODULE_LICENSE("GPL"); - -#define dprintk(level, fmt, arg...) \ - do { \ - if (debug >= level) \ - printk(KERN_DEBUG "vbuf: " fmt, ## arg); \ - } while (0) - -/* --------------------------------------------------------------------- */ - -#define CALL(q, f, arg...) \ - ((q->int_ops->f) ? q->int_ops->f(arg) : 0) -#define CALLPTR(q, f, arg...) \ - ((q->int_ops->f) ? q->int_ops->f(arg) : NULL) - -struct videobuf_buffer *videobuf_alloc_vb(struct videobuf_queue *q) -{ - struct videobuf_buffer *vb; - - BUG_ON(q->msize < sizeof(*vb)); - - if (!q->int_ops || !q->int_ops->alloc_vb) { - printk(KERN_ERR "No specific ops defined!\n"); - BUG(); - } - - vb = q->int_ops->alloc_vb(q->msize); - if (NULL != vb) { - init_waitqueue_head(&vb->done); - vb->magic = MAGIC_BUFFER; - } - - return vb; -} -EXPORT_SYMBOL_GPL(videobuf_alloc_vb); - -static int state_neither_active_nor_queued(struct videobuf_queue *q, - struct videobuf_buffer *vb) -{ - unsigned long flags; - bool rc; - - spin_lock_irqsave(q->irqlock, flags); - rc = vb->state != VIDEOBUF_ACTIVE && vb->state != VIDEOBUF_QUEUED; - spin_unlock_irqrestore(q->irqlock, flags); - return rc; -}; - -int videobuf_waiton(struct videobuf_queue *q, struct videobuf_buffer *vb, - int non_blocking, int intr) -{ - bool is_ext_locked; - int ret = 0; - - MAGIC_CHECK(vb->magic, MAGIC_BUFFER); - - if (non_blocking) { - if (state_neither_active_nor_queued(q, vb)) - return 0; - return -EAGAIN; - } - - is_ext_locked = q->ext_lock && mutex_is_locked(q->ext_lock); - - /* Release vdev lock to prevent this wait from blocking outside access to - the device. */ - if (is_ext_locked) - mutex_unlock(q->ext_lock); - if (intr) - ret = wait_event_interruptible(vb->done, - state_neither_active_nor_queued(q, vb)); - else - wait_event(vb->done, state_neither_active_nor_queued(q, vb)); - /* Relock */ - if (is_ext_locked) - mutex_lock(q->ext_lock); - - return ret; -} -EXPORT_SYMBOL_GPL(videobuf_waiton); - -int videobuf_iolock(struct videobuf_queue *q, struct videobuf_buffer *vb, - struct v4l2_framebuffer *fbuf) -{ - MAGIC_CHECK(vb->magic, MAGIC_BUFFER); - MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); - - return CALL(q, iolock, q, vb, fbuf); -} -EXPORT_SYMBOL_GPL(videobuf_iolock); - -void *videobuf_queue_to_vaddr(struct videobuf_queue *q, - struct videobuf_buffer *buf) -{ - if (q->int_ops->vaddr) - return q->int_ops->vaddr(buf); - return NULL; -} -EXPORT_SYMBOL_GPL(videobuf_queue_to_vaddr); - -/* --------------------------------------------------------------------- */ - - -void videobuf_queue_core_init(struct videobuf_queue *q, - const struct videobuf_queue_ops *ops, - struct device *dev, - spinlock_t *irqlock, - enum v4l2_buf_type type, - enum v4l2_field field, - unsigned int msize, - void *priv, - struct videobuf_qtype_ops *int_ops, - struct mutex *ext_lock) -{ - BUG_ON(!q); - memset(q, 0, sizeof(*q)); - q->irqlock = irqlock; - q->ext_lock = ext_lock; - q->dev = dev; - q->type = type; - q->field = field; - q->msize = msize; - q->ops = ops; - q->priv_data = priv; - q->int_ops = int_ops; - - /* All buffer operations are mandatory */ - BUG_ON(!q->ops->buf_setup); - BUG_ON(!q->ops->buf_prepare); - BUG_ON(!q->ops->buf_queue); - BUG_ON(!q->ops->buf_release); - - /* Lock is mandatory for queue_cancel to work */ - BUG_ON(!irqlock); - - /* Having implementations for abstract methods are mandatory */ - BUG_ON(!q->int_ops); - - mutex_init(&q->vb_lock); - init_waitqueue_head(&q->wait); - INIT_LIST_HEAD(&q->stream); -} -EXPORT_SYMBOL_GPL(videobuf_queue_core_init); - -/* Locking: Only usage in bttv unsafe find way to remove */ -int videobuf_queue_is_busy(struct videobuf_queue *q) -{ - int i; - - MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); - - if (q->streaming) { - dprintk(1, "busy: streaming active\n"); - return 1; - } - if (q->reading) { - dprintk(1, "busy: pending read #1\n"); - return 1; - } - if (q->read_buf) { - dprintk(1, "busy: pending read #2\n"); - return 1; - } - for (i = 0; i < VIDEO_MAX_FRAME; i++) { - if (NULL == q->bufs[i]) - continue; - if (q->bufs[i]->map) { - dprintk(1, "busy: buffer #%d mapped\n", i); - return 1; - } - if (q->bufs[i]->state == VIDEOBUF_QUEUED) { - dprintk(1, "busy: buffer #%d queued\n", i); - return 1; - } - if (q->bufs[i]->state == VIDEOBUF_ACTIVE) { - dprintk(1, "busy: buffer #%d active\n", i); - return 1; - } - } - return 0; -} -EXPORT_SYMBOL_GPL(videobuf_queue_is_busy); - -/* - * __videobuf_free() - free all the buffers and their control structures - * - * This function can only be called if streaming/reading is off, i.e. no buffers - * are under control of the driver. - */ -/* Locking: Caller holds q->vb_lock */ -static int __videobuf_free(struct videobuf_queue *q) -{ - int i; - - dprintk(1, "%s\n", __func__); - if (!q) - return 0; - - if (q->streaming || q->reading) { - dprintk(1, "Cannot free buffers when streaming or reading\n"); - return -EBUSY; - } - - MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); - - for (i = 0; i < VIDEO_MAX_FRAME; i++) - if (q->bufs[i] && q->bufs[i]->map) { - dprintk(1, "Cannot free mmapped buffers\n"); - return -EBUSY; - } - - for (i = 0; i < VIDEO_MAX_FRAME; i++) { - if (NULL == q->bufs[i]) - continue; - q->ops->buf_release(q, q->bufs[i]); - kfree(q->bufs[i]); - q->bufs[i] = NULL; - } - - return 0; -} - -/* Locking: Caller holds q->vb_lock */ -void videobuf_queue_cancel(struct videobuf_queue *q) -{ - unsigned long flags = 0; - int i; - - q->streaming = 0; - q->reading = 0; - wake_up_interruptible_sync(&q->wait); - - /* remove queued buffers from list */ - spin_lock_irqsave(q->irqlock, flags); - for (i = 0; i < VIDEO_MAX_FRAME; i++) { - if (NULL == q->bufs[i]) - continue; - if (q->bufs[i]->state == VIDEOBUF_QUEUED) { - list_del(&q->bufs[i]->queue); - q->bufs[i]->state = VIDEOBUF_ERROR; - wake_up_all(&q->bufs[i]->done); - } - } - spin_unlock_irqrestore(q->irqlock, flags); - - /* free all buffers + clear queue */ - for (i = 0; i < VIDEO_MAX_FRAME; i++) { - if (NULL == q->bufs[i]) - continue; - q->ops->buf_release(q, q->bufs[i]); - } - INIT_LIST_HEAD(&q->stream); -} -EXPORT_SYMBOL_GPL(videobuf_queue_cancel); - -/* --------------------------------------------------------------------- */ - -/* Locking: Caller holds q->vb_lock */ -enum v4l2_field videobuf_next_field(struct videobuf_queue *q) -{ - enum v4l2_field field = q->field; - - BUG_ON(V4L2_FIELD_ANY == field); - - if (V4L2_FIELD_ALTERNATE == field) { - if (V4L2_FIELD_TOP == q->last) { - field = V4L2_FIELD_BOTTOM; - q->last = V4L2_FIELD_BOTTOM; - } else { - field = V4L2_FIELD_TOP; - q->last = V4L2_FIELD_TOP; - } - } - return field; -} -EXPORT_SYMBOL_GPL(videobuf_next_field); - -/* Locking: Caller holds q->vb_lock */ -static void videobuf_status(struct videobuf_queue *q, struct v4l2_buffer *b, - struct videobuf_buffer *vb, enum v4l2_buf_type type) -{ - MAGIC_CHECK(vb->magic, MAGIC_BUFFER); - MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); - - b->index = vb->i; - b->type = type; - - b->memory = vb->memory; - switch (b->memory) { - case V4L2_MEMORY_MMAP: - b->m.offset = vb->boff; - b->length = vb->bsize; - break; - case V4L2_MEMORY_USERPTR: - b->m.userptr = vb->baddr; - b->length = vb->bsize; - break; - case V4L2_MEMORY_OVERLAY: - b->m.offset = vb->boff; - break; - case V4L2_MEMORY_DMABUF: - /* DMABUF is not handled in videobuf framework */ - break; - } - - b->flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; - if (vb->map) - b->flags |= V4L2_BUF_FLAG_MAPPED; - - switch (vb->state) { - case VIDEOBUF_PREPARED: - case VIDEOBUF_QUEUED: - case VIDEOBUF_ACTIVE: - b->flags |= V4L2_BUF_FLAG_QUEUED; - break; - case VIDEOBUF_ERROR: - b->flags |= V4L2_BUF_FLAG_ERROR; - fallthrough; - case VIDEOBUF_DONE: - b->flags |= V4L2_BUF_FLAG_DONE; - break; - case VIDEOBUF_NEEDS_INIT: - case VIDEOBUF_IDLE: - /* nothing */ - break; - } - - b->field = vb->field; - v4l2_buffer_set_timestamp(b, vb->ts); - b->bytesused = vb->size; - b->sequence = vb->field_count >> 1; -} - -int videobuf_mmap_free(struct videobuf_queue *q) -{ - int ret; - videobuf_queue_lock(q); - ret = __videobuf_free(q); - videobuf_queue_unlock(q); - return ret; -} -EXPORT_SYMBOL_GPL(videobuf_mmap_free); - -/* Locking: Caller holds q->vb_lock */ -int __videobuf_mmap_setup(struct videobuf_queue *q, - unsigned int bcount, unsigned int bsize, - enum v4l2_memory memory) -{ - unsigned int i; - int err; - - MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); - - err = __videobuf_free(q); - if (0 != err) - return err; - - /* Allocate and initialize buffers */ - for (i = 0; i < bcount; i++) { - q->bufs[i] = videobuf_alloc_vb(q); - - if (NULL == q->bufs[i]) - break; - - q->bufs[i]->i = i; - q->bufs[i]->memory = memory; - q->bufs[i]->bsize = bsize; - switch (memory) { - case V4L2_MEMORY_MMAP: - q->bufs[i]->boff = PAGE_ALIGN(bsize) * i; - break; - case V4L2_MEMORY_USERPTR: - case V4L2_MEMORY_OVERLAY: - case V4L2_MEMORY_DMABUF: - /* nothing */ - break; - } - } - - if (!i) - return -ENOMEM; - - dprintk(1, "mmap setup: %d buffers, %d bytes each\n", i, bsize); - - return i; -} -EXPORT_SYMBOL_GPL(__videobuf_mmap_setup); - -int videobuf_mmap_setup(struct videobuf_queue *q, - unsigned int bcount, unsigned int bsize, - enum v4l2_memory memory) -{ - int ret; - videobuf_queue_lock(q); - ret = __videobuf_mmap_setup(q, bcount, bsize, memory); - videobuf_queue_unlock(q); - return ret; -} -EXPORT_SYMBOL_GPL(videobuf_mmap_setup); - -int videobuf_reqbufs(struct videobuf_queue *q, - struct v4l2_requestbuffers *req) -{ - unsigned int size, count; - int retval; - - if (req->memory != V4L2_MEMORY_MMAP && - req->memory != V4L2_MEMORY_USERPTR && - req->memory != V4L2_MEMORY_OVERLAY) { - dprintk(1, "reqbufs: memory type invalid\n"); - return -EINVAL; - } - - videobuf_queue_lock(q); - if (req->type != q->type) { - dprintk(1, "reqbufs: queue type invalid\n"); - retval = -EINVAL; - goto done; - } - - if (q->streaming) { - dprintk(1, "reqbufs: streaming already exists\n"); - retval = -EBUSY; - goto done; - } - if (!list_empty(&q->stream)) { - dprintk(1, "reqbufs: stream running\n"); - retval = -EBUSY; - goto done; - } - - if (req->count == 0) { - dprintk(1, "reqbufs: count invalid (%d)\n", req->count); - retval = __videobuf_free(q); - goto done; - } - - count = req->count; - if (count > VIDEO_MAX_FRAME) - count = VIDEO_MAX_FRAME; - size = 0; - q->ops->buf_setup(q, &count, &size); - dprintk(1, "reqbufs: bufs=%d, size=0x%x [%u pages total]\n", - count, size, - (unsigned int)((count * PAGE_ALIGN(size)) >> PAGE_SHIFT)); - - retval = __videobuf_mmap_setup(q, count, size, req->memory); - if (retval < 0) { - dprintk(1, "reqbufs: mmap setup returned %d\n", retval); - goto done; - } - - req->count = retval; - retval = 0; - - done: - videobuf_queue_unlock(q); - return retval; -} -EXPORT_SYMBOL_GPL(videobuf_reqbufs); - -int videobuf_querybuf(struct videobuf_queue *q, struct v4l2_buffer *b) -{ - int ret = -EINVAL; - - videobuf_queue_lock(q); - if (unlikely(b->type != q->type)) { - dprintk(1, "querybuf: Wrong type.\n"); - goto done; - } - if (unlikely(b->index >= VIDEO_MAX_FRAME)) { - dprintk(1, "querybuf: index out of range.\n"); - goto done; - } - if (unlikely(NULL == q->bufs[b->index])) { - dprintk(1, "querybuf: buffer is null.\n"); - goto done; - } - - videobuf_status(q, b, q->bufs[b->index], q->type); - - ret = 0; -done: - videobuf_queue_unlock(q); - return ret; -} -EXPORT_SYMBOL_GPL(videobuf_querybuf); - -int videobuf_qbuf(struct videobuf_queue *q, struct v4l2_buffer *b) -{ - struct videobuf_buffer *buf; - enum v4l2_field field; - unsigned long flags = 0; - int retval; - - MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); - - if (b->memory == V4L2_MEMORY_MMAP) - mmap_read_lock(current->mm); - - videobuf_queue_lock(q); - retval = -EBUSY; - if (q->reading) { - dprintk(1, "qbuf: Reading running...\n"); - goto done; - } - retval = -EINVAL; - if (b->type != q->type) { - dprintk(1, "qbuf: Wrong type.\n"); - goto done; - } - if (b->index >= VIDEO_MAX_FRAME) { - dprintk(1, "qbuf: index out of range.\n"); - goto done; - } - buf = q->bufs[b->index]; - if (NULL == buf) { - dprintk(1, "qbuf: buffer is null.\n"); - goto done; - } - MAGIC_CHECK(buf->magic, MAGIC_BUFFER); - if (buf->memory != b->memory) { - dprintk(1, "qbuf: memory type is wrong.\n"); - goto done; - } - if (buf->state != VIDEOBUF_NEEDS_INIT && buf->state != VIDEOBUF_IDLE) { - dprintk(1, "qbuf: buffer is already queued or active.\n"); - goto done; - } - - switch (b->memory) { - case V4L2_MEMORY_MMAP: - if (0 == buf->baddr) { - dprintk(1, "qbuf: mmap requested but buffer addr is zero!\n"); - goto done; - } - if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT - || q->type == V4L2_BUF_TYPE_VBI_OUTPUT - || q->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT - || q->type == V4L2_BUF_TYPE_SDR_OUTPUT) { - buf->size = b->bytesused; - buf->field = b->field; - buf->ts = v4l2_buffer_get_timestamp(b); - } - break; - case V4L2_MEMORY_USERPTR: - if (b->length < buf->bsize) { - dprintk(1, "qbuf: buffer length is not enough\n"); - goto done; - } - if (VIDEOBUF_NEEDS_INIT != buf->state && - buf->baddr != b->m.userptr) - q->ops->buf_release(q, buf); - buf->baddr = b->m.userptr; - break; - case V4L2_MEMORY_OVERLAY: - buf->boff = b->m.offset; - break; - default: - dprintk(1, "qbuf: wrong memory type\n"); - goto done; - } - - dprintk(1, "qbuf: requesting next field\n"); - field = videobuf_next_field(q); - retval = q->ops->buf_prepare(q, buf, field); - if (0 != retval) { - dprintk(1, "qbuf: buffer_prepare returned %d\n", retval); - goto done; - } - - list_add_tail(&buf->stream, &q->stream); - if (q->streaming) { - spin_lock_irqsave(q->irqlock, flags); - q->ops->buf_queue(q, buf); - spin_unlock_irqrestore(q->irqlock, flags); - } - dprintk(1, "qbuf: succeeded\n"); - retval = 0; - wake_up_interruptible_sync(&q->wait); - -done: - videobuf_queue_unlock(q); - - if (b->memory == V4L2_MEMORY_MMAP) - mmap_read_unlock(current->mm); - - return retval; -} -EXPORT_SYMBOL_GPL(videobuf_qbuf); - -/* Locking: Caller holds q->vb_lock */ -static int stream_next_buffer_check_queue(struct videobuf_queue *q, int noblock) -{ - int retval; - -checks: - if (!q->streaming) { - dprintk(1, "next_buffer: Not streaming\n"); - retval = -EINVAL; - goto done; - } - - if (list_empty(&q->stream)) { - if (noblock) { - retval = -EAGAIN; - dprintk(2, "next_buffer: no buffers to dequeue\n"); - goto done; - } else { - dprintk(2, "next_buffer: waiting on buffer\n"); - - /* Drop lock to avoid deadlock with qbuf */ - videobuf_queue_unlock(q); - - /* Checking list_empty and streaming is safe without - * locks because we goto checks to validate while - * holding locks before proceeding */ - retval = wait_event_interruptible(q->wait, - !list_empty(&q->stream) || !q->streaming); - videobuf_queue_lock(q); - - if (retval) - goto done; - - goto checks; - } - } - - retval = 0; - -done: - return retval; -} - -/* Locking: Caller holds q->vb_lock */ -static int stream_next_buffer(struct videobuf_queue *q, - struct videobuf_buffer **vb, int nonblocking) -{ - int retval; - struct videobuf_buffer *buf = NULL; - - retval = stream_next_buffer_check_queue(q, nonblocking); - if (retval) - goto done; - - buf = list_entry(q->stream.next, struct videobuf_buffer, stream); - retval = videobuf_waiton(q, buf, nonblocking, 1); - if (retval < 0) - goto done; - - *vb = buf; -done: - return retval; -} - -int videobuf_dqbuf(struct videobuf_queue *q, - struct v4l2_buffer *b, int nonblocking) -{ - struct videobuf_buffer *buf = NULL; - int retval; - - MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); - - memset(b, 0, sizeof(*b)); - videobuf_queue_lock(q); - - retval = stream_next_buffer(q, &buf, nonblocking); - if (retval < 0) { - dprintk(1, "dqbuf: next_buffer error: %i\n", retval); - goto done; - } - - switch (buf->state) { - case VIDEOBUF_ERROR: - dprintk(1, "dqbuf: state is error\n"); - break; - case VIDEOBUF_DONE: - dprintk(1, "dqbuf: state is done\n"); - break; - default: - dprintk(1, "dqbuf: state invalid\n"); - retval = -EINVAL; - goto done; - } - CALL(q, sync, q, buf); - videobuf_status(q, b, buf, q->type); - list_del(&buf->stream); - buf->state = VIDEOBUF_IDLE; - b->flags &= ~V4L2_BUF_FLAG_DONE; -done: - videobuf_queue_unlock(q); - return retval; -} -EXPORT_SYMBOL_GPL(videobuf_dqbuf); - -int videobuf_streamon(struct videobuf_queue *q) -{ - struct videobuf_buffer *buf; - unsigned long flags = 0; - int retval; - - videobuf_queue_lock(q); - retval = -EBUSY; - if (q->reading) - goto done; - retval = 0; - if (q->streaming) - goto done; - q->streaming = 1; - spin_lock_irqsave(q->irqlock, flags); - list_for_each_entry(buf, &q->stream, stream) - if (buf->state == VIDEOBUF_PREPARED) - q->ops->buf_queue(q, buf); - spin_unlock_irqrestore(q->irqlock, flags); - - wake_up_interruptible_sync(&q->wait); -done: - videobuf_queue_unlock(q); - return retval; -} -EXPORT_SYMBOL_GPL(videobuf_streamon); - -/* Locking: Caller holds q->vb_lock */ -static int __videobuf_streamoff(struct videobuf_queue *q) -{ - if (!q->streaming) - return -EINVAL; - - videobuf_queue_cancel(q); - - return 0; -} - -int videobuf_streamoff(struct videobuf_queue *q) -{ - int retval; - - videobuf_queue_lock(q); - retval = __videobuf_streamoff(q); - videobuf_queue_unlock(q); - - return retval; -} -EXPORT_SYMBOL_GPL(videobuf_streamoff); - -/* Locking: Caller holds q->vb_lock */ -static ssize_t videobuf_read_zerocopy(struct videobuf_queue *q, - char __user *data, - size_t count, loff_t *ppos) -{ - enum v4l2_field field; - unsigned long flags = 0; - int retval; - - MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); - - /* setup stuff */ - q->read_buf = videobuf_alloc_vb(q); - if (NULL == q->read_buf) - return -ENOMEM; - - q->read_buf->memory = V4L2_MEMORY_USERPTR; - q->read_buf->baddr = (unsigned long)data; - q->read_buf->bsize = count; - - field = videobuf_next_field(q); - retval = q->ops->buf_prepare(q, q->read_buf, field); - if (0 != retval) - goto done; - - /* start capture & wait */ - spin_lock_irqsave(q->irqlock, flags); - q->ops->buf_queue(q, q->read_buf); - spin_unlock_irqrestore(q->irqlock, flags); - retval = videobuf_waiton(q, q->read_buf, 0, 0); - if (0 == retval) { - CALL(q, sync, q, q->read_buf); - if (VIDEOBUF_ERROR == q->read_buf->state) - retval = -EIO; - else - retval = q->read_buf->size; - } - -done: - /* cleanup */ - q->ops->buf_release(q, q->read_buf); - kfree(q->read_buf); - q->read_buf = NULL; - return retval; -} - -static int __videobuf_copy_to_user(struct videobuf_queue *q, - struct videobuf_buffer *buf, - char __user *data, size_t count, - int nonblocking) -{ - void *vaddr = CALLPTR(q, vaddr, buf); - - /* copy to userspace */ - if (count > buf->size - q->read_off) - count = buf->size - q->read_off; - - if (copy_to_user(data, vaddr + q->read_off, count)) - return -EFAULT; - - return count; -} - -static int __videobuf_copy_stream(struct videobuf_queue *q, - struct videobuf_buffer *buf, - char __user *data, size_t count, size_t pos, - int vbihack, int nonblocking) -{ - unsigned int *fc = CALLPTR(q, vaddr, buf); - - if (vbihack) { - /* dirty, undocumented hack -- pass the frame counter - * within the last four bytes of each vbi data block. - * We need that one to maintain backward compatibility - * to all vbi decoding software out there ... */ - fc += (buf->size >> 2) - 1; - *fc = buf->field_count >> 1; - dprintk(1, "vbihack: %d\n", *fc); - } - - /* copy stuff using the common method */ - count = __videobuf_copy_to_user(q, buf, data, count, nonblocking); - - if ((count == -EFAULT) && (pos == 0)) - return -EFAULT; - - return count; -} - -ssize_t videobuf_read_one(struct videobuf_queue *q, - char __user *data, size_t count, loff_t *ppos, - int nonblocking) -{ - enum v4l2_field field; - unsigned long flags = 0; - unsigned size = 0, nbufs = 1; - int retval; - - MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); - - videobuf_queue_lock(q); - - q->ops->buf_setup(q, &nbufs, &size); - - if (NULL == q->read_buf && - count >= size && - !nonblocking) { - retval = videobuf_read_zerocopy(q, data, count, ppos); - if (retval >= 0 || retval == -EIO) - /* ok, all done */ - goto done; - /* fallback to kernel bounce buffer on failures */ - } - - if (NULL == q->read_buf) { - /* need to capture a new frame */ - retval = -ENOMEM; - q->read_buf = videobuf_alloc_vb(q); - - dprintk(1, "video alloc=0x%p\n", q->read_buf); - if (NULL == q->read_buf) - goto done; - q->read_buf->memory = V4L2_MEMORY_USERPTR; - q->read_buf->bsize = count; /* preferred size */ - field = videobuf_next_field(q); - retval = q->ops->buf_prepare(q, q->read_buf, field); - - if (0 != retval) { - kfree(q->read_buf); - q->read_buf = NULL; - goto done; - } - - spin_lock_irqsave(q->irqlock, flags); - q->ops->buf_queue(q, q->read_buf); - spin_unlock_irqrestore(q->irqlock, flags); - - q->read_off = 0; - } - - /* wait until capture is done */ - retval = videobuf_waiton(q, q->read_buf, nonblocking, 1); - if (0 != retval) - goto done; - - CALL(q, sync, q, q->read_buf); - - if (VIDEOBUF_ERROR == q->read_buf->state) { - /* catch I/O errors */ - q->ops->buf_release(q, q->read_buf); - kfree(q->read_buf); - q->read_buf = NULL; - retval = -EIO; - goto done; - } - - /* Copy to userspace */ - retval = __videobuf_copy_to_user(q, q->read_buf, data, count, nonblocking); - if (retval < 0) - goto done; - - q->read_off += retval; - if (q->read_off == q->read_buf->size) { - /* all data copied, cleanup */ - q->ops->buf_release(q, q->read_buf); - kfree(q->read_buf); - q->read_buf = NULL; - } - -done: - videobuf_queue_unlock(q); - return retval; -} -EXPORT_SYMBOL_GPL(videobuf_read_one); - -/* Locking: Caller holds q->vb_lock */ -static int __videobuf_read_start(struct videobuf_queue *q) -{ - enum v4l2_field field; - unsigned long flags = 0; - unsigned int count = 0, size = 0; - int err, i; - - q->ops->buf_setup(q, &count, &size); - if (count < 2) - count = 2; - if (count > VIDEO_MAX_FRAME) - count = VIDEO_MAX_FRAME; - size = PAGE_ALIGN(size); - - err = __videobuf_mmap_setup(q, count, size, V4L2_MEMORY_USERPTR); - if (err < 0) - return err; - - count = err; - - for (i = 0; i < count; i++) { - field = videobuf_next_field(q); - err = q->ops->buf_prepare(q, q->bufs[i], field); - if (err) - return err; - list_add_tail(&q->bufs[i]->stream, &q->stream); - } - spin_lock_irqsave(q->irqlock, flags); - for (i = 0; i < count; i++) - q->ops->buf_queue(q, q->bufs[i]); - spin_unlock_irqrestore(q->irqlock, flags); - q->reading = 1; - return 0; -} - -static void __videobuf_read_stop(struct videobuf_queue *q) -{ - int i; - - videobuf_queue_cancel(q); - __videobuf_free(q); - INIT_LIST_HEAD(&q->stream); - for (i = 0; i < VIDEO_MAX_FRAME; i++) { - if (NULL == q->bufs[i]) - continue; - kfree(q->bufs[i]); - q->bufs[i] = NULL; - } - q->read_buf = NULL; -} - -int videobuf_read_start(struct videobuf_queue *q) -{ - int rc; - - videobuf_queue_lock(q); - rc = __videobuf_read_start(q); - videobuf_queue_unlock(q); - - return rc; -} -EXPORT_SYMBOL_GPL(videobuf_read_start); - -void videobuf_read_stop(struct videobuf_queue *q) -{ - videobuf_queue_lock(q); - __videobuf_read_stop(q); - videobuf_queue_unlock(q); -} -EXPORT_SYMBOL_GPL(videobuf_read_stop); - -void videobuf_stop(struct videobuf_queue *q) -{ - videobuf_queue_lock(q); - - if (q->streaming) - __videobuf_streamoff(q); - - if (q->reading) - __videobuf_read_stop(q); - - videobuf_queue_unlock(q); -} -EXPORT_SYMBOL_GPL(videobuf_stop); - -ssize_t videobuf_read_stream(struct videobuf_queue *q, - char __user *data, size_t count, loff_t *ppos, - int vbihack, int nonblocking) -{ - int rc, retval; - unsigned long flags = 0; - - MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); - - dprintk(2, "%s\n", __func__); - videobuf_queue_lock(q); - retval = -EBUSY; - if (q->streaming) - goto done; - if (!q->reading) { - retval = __videobuf_read_start(q); - if (retval < 0) - goto done; - } - - retval = 0; - while (count > 0) { - /* get / wait for data */ - if (NULL == q->read_buf) { - q->read_buf = list_entry(q->stream.next, - struct videobuf_buffer, - stream); - list_del(&q->read_buf->stream); - q->read_off = 0; - } - rc = videobuf_waiton(q, q->read_buf, nonblocking, 1); - if (rc < 0) { - if (0 == retval) - retval = rc; - break; - } - - if (q->read_buf->state == VIDEOBUF_DONE) { - rc = __videobuf_copy_stream(q, q->read_buf, data + retval, count, - retval, vbihack, nonblocking); - if (rc < 0) { - retval = rc; - break; - } - retval += rc; - count -= rc; - q->read_off += rc; - } else { - /* some error */ - q->read_off = q->read_buf->size; - if (0 == retval) - retval = -EIO; - } - - /* requeue buffer when done with copying */ - if (q->read_off == q->read_buf->size) { - list_add_tail(&q->read_buf->stream, - &q->stream); - spin_lock_irqsave(q->irqlock, flags); - q->ops->buf_queue(q, q->read_buf); - spin_unlock_irqrestore(q->irqlock, flags); - q->read_buf = NULL; - } - if (retval < 0) - break; - } - -done: - videobuf_queue_unlock(q); - return retval; -} -EXPORT_SYMBOL_GPL(videobuf_read_stream); - -__poll_t videobuf_poll_stream(struct file *file, - struct videobuf_queue *q, - poll_table *wait) -{ - __poll_t req_events = poll_requested_events(wait); - struct videobuf_buffer *buf = NULL; - __poll_t rc = 0; - - videobuf_queue_lock(q); - if (q->streaming) { - if (!list_empty(&q->stream)) - buf = list_entry(q->stream.next, - struct videobuf_buffer, stream); - } else if (req_events & (EPOLLIN | EPOLLRDNORM)) { - if (!q->reading) - __videobuf_read_start(q); - if (!q->reading) { - rc = EPOLLERR; - } else if (NULL == q->read_buf) { - q->read_buf = list_entry(q->stream.next, - struct videobuf_buffer, - stream); - list_del(&q->read_buf->stream); - q->read_off = 0; - } - buf = q->read_buf; - } - if (buf) - poll_wait(file, &buf->done, wait); - else - rc = EPOLLERR; - - if (0 == rc) { - if (buf->state == VIDEOBUF_DONE || - buf->state == VIDEOBUF_ERROR) { - switch (q->type) { - case V4L2_BUF_TYPE_VIDEO_OUTPUT: - case V4L2_BUF_TYPE_VBI_OUTPUT: - case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: - case V4L2_BUF_TYPE_SDR_OUTPUT: - rc = EPOLLOUT | EPOLLWRNORM; - break; - default: - rc = EPOLLIN | EPOLLRDNORM; - break; - } - } - } - videobuf_queue_unlock(q); - return rc; -} -EXPORT_SYMBOL_GPL(videobuf_poll_stream); - -int videobuf_mmap_mapper(struct videobuf_queue *q, struct vm_area_struct *vma) -{ - int rc = -EINVAL; - int i; - - MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); - - if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED)) { - dprintk(1, "mmap appl bug: PROT_WRITE and MAP_SHARED are required\n"); - return -EINVAL; - } - - videobuf_queue_lock(q); - for (i = 0; i < VIDEO_MAX_FRAME; i++) { - struct videobuf_buffer *buf = q->bufs[i]; - - if (buf && buf->memory == V4L2_MEMORY_MMAP && - buf->boff == (vma->vm_pgoff << PAGE_SHIFT)) { - rc = CALL(q, mmap_mapper, q, buf, vma); - break; - } - } - videobuf_queue_unlock(q); - - return rc; -} -EXPORT_SYMBOL_GPL(videobuf_mmap_mapper); diff --git a/drivers/media/v4l2-core/videobuf-dma-contig.c b/drivers/media/v4l2-core/videobuf-dma-contig.c deleted file mode 100644 index 4c2ec7a0d804..000000000000 --- a/drivers/media/v4l2-core/videobuf-dma-contig.c +++ /dev/null @@ -1,402 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * helper functions for physically contiguous capture buffers - * - * The functions support hardware lacking scatter gather support - * (i.e. the buffers must be linear in physical memory) - * - * Copyright (c) 2008 Magnus Damm - * - * Based on videobuf-vmalloc.c, - * (c) 2007 Mauro Carvalho Chehab, - */ - -#include -#include -#include -#include -#include -#include -#include -#include - -struct videobuf_dma_contig_memory { - u32 magic; - void *vaddr; - dma_addr_t dma_handle; - unsigned long size; -}; - -#define MAGIC_DC_MEM 0x0733ac61 -#define MAGIC_CHECK(is, should) \ - if (unlikely((is) != (should))) { \ - pr_err("magic mismatch: %x expected %x\n", (is), (should)); \ - BUG(); \ - } - -static int __videobuf_dc_alloc(struct device *dev, - struct videobuf_dma_contig_memory *mem, - unsigned long size) -{ - mem->size = size; - mem->vaddr = dma_alloc_coherent(dev, mem->size, &mem->dma_handle, - GFP_KERNEL); - if (!mem->vaddr) { - dev_err(dev, "memory alloc size %ld failed\n", mem->size); - return -ENOMEM; - } - - dev_dbg(dev, "dma mapped data is at %p (%ld)\n", mem->vaddr, mem->size); - - return 0; -} - -static void __videobuf_dc_free(struct device *dev, - struct videobuf_dma_contig_memory *mem) -{ - dma_free_coherent(dev, mem->size, mem->vaddr, mem->dma_handle); - - mem->vaddr = NULL; -} - -static void videobuf_vm_open(struct vm_area_struct *vma) -{ - struct videobuf_mapping *map = vma->vm_private_data; - - dev_dbg(map->q->dev, "vm_open %p [count=%u,vma=%08lx-%08lx]\n", - map, map->count, vma->vm_start, vma->vm_end); - - map->count++; -} - -static void videobuf_vm_close(struct vm_area_struct *vma) -{ - struct videobuf_mapping *map = vma->vm_private_data; - struct videobuf_queue *q = map->q; - int i; - - dev_dbg(q->dev, "vm_close %p [count=%u,vma=%08lx-%08lx]\n", - map, map->count, vma->vm_start, vma->vm_end); - - map->count--; - if (0 == map->count) { - struct videobuf_dma_contig_memory *mem; - - dev_dbg(q->dev, "munmap %p q=%p\n", map, q); - videobuf_queue_lock(q); - - /* We need first to cancel streams, before unmapping */ - if (q->streaming) - videobuf_queue_cancel(q); - - for (i = 0; i < VIDEO_MAX_FRAME; i++) { - if (NULL == q->bufs[i]) - continue; - - if (q->bufs[i]->map != map) - continue; - - mem = q->bufs[i]->priv; - if (mem) { - /* This callback is called only if kernel has - allocated memory and this memory is mmapped. - In this case, memory should be freed, - in order to do memory unmap. - */ - - MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); - - /* vfree is not atomic - can't be - called with IRQ's disabled - */ - dev_dbg(q->dev, "buf[%d] freeing %p\n", - i, mem->vaddr); - - __videobuf_dc_free(q->dev, mem); - mem->vaddr = NULL; - } - - q->bufs[i]->map = NULL; - q->bufs[i]->baddr = 0; - } - - kfree(map); - - videobuf_queue_unlock(q); - } -} - -static const struct vm_operations_struct videobuf_vm_ops = { - .open = videobuf_vm_open, - .close = videobuf_vm_close, -}; - -/** - * videobuf_dma_contig_user_put() - reset pointer to user space buffer - * @mem: per-buffer private videobuf-dma-contig data - * - * This function resets the user space pointer - */ -static void videobuf_dma_contig_user_put(struct videobuf_dma_contig_memory *mem) -{ - mem->dma_handle = 0; - mem->size = 0; -} - -/** - * videobuf_dma_contig_user_get() - setup user space memory pointer - * @mem: per-buffer private videobuf-dma-contig data - * @vb: video buffer to map - * - * This function validates and sets up a pointer to user space memory. - * Only physically contiguous pfn-mapped memory is accepted. - * - * Returns 0 if successful. - */ -static int videobuf_dma_contig_user_get(struct videobuf_dma_contig_memory *mem, - struct videobuf_buffer *vb) -{ - unsigned long untagged_baddr = untagged_addr(vb->baddr); - struct mm_struct *mm = current->mm; - struct vm_area_struct *vma; - unsigned long prev_pfn, this_pfn; - unsigned long pages_done, user_address; - unsigned int offset; - int ret; - - offset = untagged_baddr & ~PAGE_MASK; - mem->size = PAGE_ALIGN(vb->size + offset); - ret = -EINVAL; - - mmap_read_lock(mm); - - vma = find_vma(mm, untagged_baddr); - if (!vma) - goto out_up; - - if ((untagged_baddr + mem->size) > vma->vm_end) - goto out_up; - - pages_done = 0; - prev_pfn = 0; /* kill warning */ - user_address = untagged_baddr; - - while (pages_done < (mem->size >> PAGE_SHIFT)) { - ret = follow_pfn(vma, user_address, &this_pfn); - if (ret) - break; - - if (pages_done == 0) - mem->dma_handle = (this_pfn << PAGE_SHIFT) + offset; - else if (this_pfn != (prev_pfn + 1)) - ret = -EFAULT; - - if (ret) - break; - - prev_pfn = this_pfn; - user_address += PAGE_SIZE; - pages_done++; - } - -out_up: - mmap_read_unlock(current->mm); - - return ret; -} - -static struct videobuf_buffer *__videobuf_alloc(size_t size) -{ - struct videobuf_dma_contig_memory *mem; - struct videobuf_buffer *vb; - - vb = kzalloc(size + sizeof(*mem), GFP_KERNEL); - if (vb) { - vb->priv = ((char *)vb) + size; - mem = vb->priv; - mem->magic = MAGIC_DC_MEM; - } - - return vb; -} - -static void *__videobuf_to_vaddr(struct videobuf_buffer *buf) -{ - struct videobuf_dma_contig_memory *mem = buf->priv; - - BUG_ON(!mem); - MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); - - return mem->vaddr; -} - -static int __videobuf_iolock(struct videobuf_queue *q, - struct videobuf_buffer *vb, - struct v4l2_framebuffer *fbuf) -{ - struct videobuf_dma_contig_memory *mem = vb->priv; - - BUG_ON(!mem); - MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); - - switch (vb->memory) { - case V4L2_MEMORY_MMAP: - dev_dbg(q->dev, "%s memory method MMAP\n", __func__); - - /* All handling should be done by __videobuf_mmap_mapper() */ - if (!mem->vaddr) { - dev_err(q->dev, "memory is not allocated/mmapped.\n"); - return -EINVAL; - } - break; - case V4L2_MEMORY_USERPTR: - dev_dbg(q->dev, "%s memory method USERPTR\n", __func__); - - /* handle pointer from user space */ - if (vb->baddr) - return videobuf_dma_contig_user_get(mem, vb); - - /* allocate memory for the read() method */ - if (__videobuf_dc_alloc(q->dev, mem, PAGE_ALIGN(vb->size))) - return -ENOMEM; - break; - case V4L2_MEMORY_OVERLAY: - default: - dev_dbg(q->dev, "%s memory method OVERLAY/unknown\n", __func__); - return -EINVAL; - } - - return 0; -} - -static int __videobuf_mmap_mapper(struct videobuf_queue *q, - struct videobuf_buffer *buf, - struct vm_area_struct *vma) -{ - struct videobuf_dma_contig_memory *mem; - struct videobuf_mapping *map; - int retval; - - dev_dbg(q->dev, "%s\n", __func__); - - /* create mapping + update buffer list */ - map = kzalloc(sizeof(struct videobuf_mapping), GFP_KERNEL); - if (!map) - return -ENOMEM; - - buf->map = map; - map->q = q; - - buf->baddr = vma->vm_start; - - mem = buf->priv; - BUG_ON(!mem); - MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); - - if (__videobuf_dc_alloc(q->dev, mem, PAGE_ALIGN(buf->bsize))) - goto error; - - /* the "vm_pgoff" is just used in v4l2 to find the - * corresponding buffer data structure which is allocated - * earlier and it does not mean the offset from the physical - * buffer start address as usual. So set it to 0 to pass - * the sanity check in dma_mmap_coherent(). - */ - vma->vm_pgoff = 0; - retval = dma_mmap_coherent(q->dev, vma, mem->vaddr, mem->dma_handle, - mem->size); - if (retval) { - dev_err(q->dev, "mmap: remap failed with error %d. ", - retval); - dma_free_coherent(q->dev, mem->size, - mem->vaddr, mem->dma_handle); - goto error; - } - - vma->vm_ops = &videobuf_vm_ops; - vm_flags_set(vma, VM_DONTEXPAND); - vma->vm_private_data = map; - - dev_dbg(q->dev, "mmap %p: q=%p %08lx-%08lx (%lx) pgoff %08lx buf %d\n", - map, q, vma->vm_start, vma->vm_end, - (long int)buf->bsize, vma->vm_pgoff, buf->i); - - videobuf_vm_open(vma); - - return 0; - -error: - kfree(map); - return -ENOMEM; -} - -static struct videobuf_qtype_ops qops = { - .magic = MAGIC_QTYPE_OPS, - .alloc_vb = __videobuf_alloc, - .iolock = __videobuf_iolock, - .mmap_mapper = __videobuf_mmap_mapper, - .vaddr = __videobuf_to_vaddr, -}; - -void videobuf_queue_dma_contig_init(struct videobuf_queue *q, - const struct videobuf_queue_ops *ops, - struct device *dev, - spinlock_t *irqlock, - enum v4l2_buf_type type, - enum v4l2_field field, - unsigned int msize, - void *priv, - struct mutex *ext_lock) -{ - videobuf_queue_core_init(q, ops, dev, irqlock, type, field, msize, - priv, &qops, ext_lock); -} -EXPORT_SYMBOL_GPL(videobuf_queue_dma_contig_init); - -dma_addr_t videobuf_to_dma_contig(struct videobuf_buffer *buf) -{ - struct videobuf_dma_contig_memory *mem = buf->priv; - - BUG_ON(!mem); - MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); - - return mem->dma_handle; -} -EXPORT_SYMBOL_GPL(videobuf_to_dma_contig); - -void videobuf_dma_contig_free(struct videobuf_queue *q, - struct videobuf_buffer *buf) -{ - struct videobuf_dma_contig_memory *mem = buf->priv; - - /* mmapped memory can't be freed here, otherwise mmapped region - would be released, while still needed. In this case, the memory - release should happen inside videobuf_vm_close(). - So, it should free memory only if the memory were allocated for - read() operation. - */ - if (buf->memory != V4L2_MEMORY_USERPTR) - return; - - if (!mem) - return; - - MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); - - /* handle user space pointer case */ - if (buf->baddr) { - videobuf_dma_contig_user_put(mem); - return; - } - - /* read() method */ - if (mem->vaddr) { - __videobuf_dc_free(q->dev, mem); - mem->vaddr = NULL; - } -} -EXPORT_SYMBOL_GPL(videobuf_dma_contig_free); - -MODULE_DESCRIPTION("helper module to manage video4linux dma contig buffers"); -MODULE_AUTHOR("Magnus Damm"); -MODULE_LICENSE("GPL"); diff --git a/drivers/media/v4l2-core/videobuf-dma-sg.c b/drivers/media/v4l2-core/videobuf-dma-sg.c deleted file mode 100644 index 405b89ea1054..000000000000 --- a/drivers/media/v4l2-core/videobuf-dma-sg.c +++ /dev/null @@ -1,681 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * helper functions for SG DMA video4linux capture buffers - * - * The functions expect the hardware being able to scatter gather - * (i.e. the buffers are not linear in physical memory, but fragmented - * into PAGE_SIZE chunks). They also assume the driver does not need - * to touch the video data. - * - * (c) 2007 Mauro Carvalho Chehab, - * - * Highly based on video-buf written originally by: - * (c) 2001,02 Gerd Knorr - * (c) 2006 Mauro Carvalho Chehab, - * (c) 2006 Ted Walther and John Sokol - */ - -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include -#include - -#include - -#define MAGIC_DMABUF 0x19721112 -#define MAGIC_SG_MEM 0x17890714 - -#define MAGIC_CHECK(is, should) \ - if (unlikely((is) != (should))) { \ - printk(KERN_ERR "magic mismatch: %x (expected %x)\n", \ - is, should); \ - BUG(); \ - } - -static int debug; -module_param(debug, int, 0644); - -MODULE_DESCRIPTION("helper module to manage video4linux dma sg buffers"); -MODULE_AUTHOR("Mauro Carvalho Chehab "); -MODULE_LICENSE("GPL"); - -#define dprintk(level, fmt, arg...) \ - if (debug >= level) \ - printk(KERN_DEBUG "vbuf-sg: " fmt , ## arg) - -/* --------------------------------------------------------------------- */ - -/* - * Return a scatterlist for some page-aligned vmalloc()'ed memory - * block (NULL on errors). Memory for the scatterlist is allocated - * using kmalloc. The caller must free the memory. - */ -static struct scatterlist *videobuf_vmalloc_to_sg(unsigned char *virt, - int nr_pages) -{ - struct scatterlist *sglist; - struct page *pg; - int i; - - sglist = vzalloc(array_size(nr_pages, sizeof(*sglist))); - if (NULL == sglist) - return NULL; - sg_init_table(sglist, nr_pages); - for (i = 0; i < nr_pages; i++, virt += PAGE_SIZE) { - pg = vmalloc_to_page(virt); - if (NULL == pg) - goto err; - BUG_ON(PageHighMem(pg)); - sg_set_page(&sglist[i], pg, PAGE_SIZE, 0); - } - return sglist; - -err: - vfree(sglist); - return NULL; -} - -/* - * Return a scatterlist for a an array of userpages (NULL on errors). - * Memory for the scatterlist is allocated using kmalloc. The caller - * must free the memory. - */ -static struct scatterlist *videobuf_pages_to_sg(struct page **pages, - int nr_pages, int offset, size_t size) -{ - struct scatterlist *sglist; - int i; - - if (NULL == pages[0]) - return NULL; - sglist = vmalloc(array_size(nr_pages, sizeof(*sglist))); - if (NULL == sglist) - return NULL; - sg_init_table(sglist, nr_pages); - - if (PageHighMem(pages[0])) - /* DMA to highmem pages might not work */ - goto highmem; - sg_set_page(&sglist[0], pages[0], - min_t(size_t, PAGE_SIZE - offset, size), offset); - size -= min_t(size_t, PAGE_SIZE - offset, size); - for (i = 1; i < nr_pages; i++) { - if (NULL == pages[i]) - goto nopage; - if (PageHighMem(pages[i])) - goto highmem; - sg_set_page(&sglist[i], pages[i], min_t(size_t, PAGE_SIZE, size), 0); - size -= min_t(size_t, PAGE_SIZE, size); - } - return sglist; - -nopage: - dprintk(2, "sgl: oops - no page\n"); - vfree(sglist); - return NULL; - -highmem: - dprintk(2, "sgl: oops - highmem page\n"); - vfree(sglist); - return NULL; -} - -/* --------------------------------------------------------------------- */ - -struct videobuf_dmabuf *videobuf_to_dma(struct videobuf_buffer *buf) -{ - struct videobuf_dma_sg_memory *mem = buf->priv; - BUG_ON(!mem); - - MAGIC_CHECK(mem->magic, MAGIC_SG_MEM); - - return &mem->dma; -} -EXPORT_SYMBOL_GPL(videobuf_to_dma); - -static void videobuf_dma_init(struct videobuf_dmabuf *dma) -{ - memset(dma, 0, sizeof(*dma)); - dma->magic = MAGIC_DMABUF; -} - -static int videobuf_dma_init_user_locked(struct videobuf_dmabuf *dma, - int direction, unsigned long data, unsigned long size) -{ - unsigned int gup_flags = FOLL_LONGTERM; - unsigned long first, last; - int err; - - dma->direction = direction; - switch (dma->direction) { - case DMA_FROM_DEVICE: - gup_flags |= FOLL_WRITE; - break; - case DMA_TO_DEVICE: - break; - default: - BUG(); - } - - first = (data & PAGE_MASK) >> PAGE_SHIFT; - last = ((data+size-1) & PAGE_MASK) >> PAGE_SHIFT; - dma->offset = data & ~PAGE_MASK; - dma->size = size; - dma->nr_pages = last-first+1; - dma->pages = kmalloc_array(dma->nr_pages, sizeof(struct page *), - GFP_KERNEL); - if (NULL == dma->pages) - return -ENOMEM; - - dprintk(1, "init user [0x%lx+0x%lx => %lu pages]\n", - data, size, dma->nr_pages); - - err = pin_user_pages(data & PAGE_MASK, dma->nr_pages, gup_flags, - dma->pages); - - if (err != dma->nr_pages) { - dma->nr_pages = (err >= 0) ? err : 0; - dprintk(1, "pin_user_pages: err=%d [%lu]\n", err, - dma->nr_pages); - return err < 0 ? err : -EINVAL; - } - return 0; -} - -static int videobuf_dma_init_user(struct videobuf_dmabuf *dma, int direction, - unsigned long data, unsigned long size) -{ - int ret; - - mmap_read_lock(current->mm); - ret = videobuf_dma_init_user_locked(dma, direction, data, size); - mmap_read_unlock(current->mm); - - return ret; -} - -static int videobuf_dma_init_kernel(struct videobuf_dmabuf *dma, int direction, - unsigned long nr_pages) -{ - int i; - - dprintk(1, "init kernel [%lu pages]\n", nr_pages); - - dma->direction = direction; - dma->vaddr_pages = kcalloc(nr_pages, sizeof(*dma->vaddr_pages), - GFP_KERNEL); - if (!dma->vaddr_pages) - return -ENOMEM; - - dma->dma_addr = kcalloc(nr_pages, sizeof(*dma->dma_addr), GFP_KERNEL); - if (!dma->dma_addr) { - kfree(dma->vaddr_pages); - return -ENOMEM; - } - for (i = 0; i < nr_pages; i++) { - void *addr; - - addr = dma_alloc_coherent(dma->dev, PAGE_SIZE, - &(dma->dma_addr[i]), GFP_KERNEL); - if (addr == NULL) - goto out_free_pages; - - dma->vaddr_pages[i] = virt_to_page(addr); - } - dma->vaddr = vmap(dma->vaddr_pages, nr_pages, VM_MAP | VM_IOREMAP, - PAGE_KERNEL); - if (NULL == dma->vaddr) { - dprintk(1, "vmalloc_32(%lu pages) failed\n", nr_pages); - goto out_free_pages; - } - - dprintk(1, "vmalloc is at addr %p, size=%lu\n", - dma->vaddr, nr_pages << PAGE_SHIFT); - - memset(dma->vaddr, 0, nr_pages << PAGE_SHIFT); - dma->nr_pages = nr_pages; - - return 0; -out_free_pages: - while (i > 0) { - void *addr; - - i--; - addr = page_address(dma->vaddr_pages[i]); - dma_free_coherent(dma->dev, PAGE_SIZE, addr, dma->dma_addr[i]); - } - kfree(dma->dma_addr); - dma->dma_addr = NULL; - kfree(dma->vaddr_pages); - dma->vaddr_pages = NULL; - - return -ENOMEM; - -} - -static int videobuf_dma_init_overlay(struct videobuf_dmabuf *dma, int direction, - dma_addr_t addr, unsigned long nr_pages) -{ - dprintk(1, "init overlay [%lu pages @ bus 0x%lx]\n", - nr_pages, (unsigned long)addr); - dma->direction = direction; - - if (0 == addr) - return -EINVAL; - - dma->bus_addr = addr; - dma->nr_pages = nr_pages; - - return 0; -} - -static int videobuf_dma_map(struct device *dev, struct videobuf_dmabuf *dma) -{ - MAGIC_CHECK(dma->magic, MAGIC_DMABUF); - BUG_ON(0 == dma->nr_pages); - - if (dma->pages) { - dma->sglist = videobuf_pages_to_sg(dma->pages, dma->nr_pages, - dma->offset, dma->size); - } - if (dma->vaddr) { - dma->sglist = videobuf_vmalloc_to_sg(dma->vaddr, - dma->nr_pages); - } - if (dma->bus_addr) { - dma->sglist = vmalloc(sizeof(*dma->sglist)); - if (NULL != dma->sglist) { - dma->sglen = 1; - sg_dma_address(&dma->sglist[0]) = dma->bus_addr - & PAGE_MASK; - dma->sglist[0].offset = dma->bus_addr & ~PAGE_MASK; - sg_dma_len(&dma->sglist[0]) = dma->nr_pages * PAGE_SIZE; - } - } - if (NULL == dma->sglist) { - dprintk(1, "scatterlist is NULL\n"); - return -ENOMEM; - } - if (!dma->bus_addr) { - dma->sglen = dma_map_sg(dev, dma->sglist, - dma->nr_pages, dma->direction); - if (0 == dma->sglen) { - printk(KERN_WARNING - "%s: videobuf_map_sg failed\n", __func__); - vfree(dma->sglist); - dma->sglist = NULL; - dma->sglen = 0; - return -ENOMEM; - } - } - - return 0; -} - -int videobuf_dma_unmap(struct device *dev, struct videobuf_dmabuf *dma) -{ - MAGIC_CHECK(dma->magic, MAGIC_DMABUF); - - if (!dma->sglen) - return 0; - - dma_unmap_sg(dev, dma->sglist, dma->nr_pages, dma->direction); - - vfree(dma->sglist); - dma->sglist = NULL; - dma->sglen = 0; - - return 0; -} -EXPORT_SYMBOL_GPL(videobuf_dma_unmap); - -int videobuf_dma_free(struct videobuf_dmabuf *dma) -{ - int i; - MAGIC_CHECK(dma->magic, MAGIC_DMABUF); - BUG_ON(dma->sglen); - - if (dma->pages) { - unpin_user_pages_dirty_lock(dma->pages, dma->nr_pages, - dma->direction == DMA_FROM_DEVICE); - kfree(dma->pages); - dma->pages = NULL; - } - - if (dma->dma_addr) { - for (i = 0; i < dma->nr_pages; i++) { - void *addr; - - addr = page_address(dma->vaddr_pages[i]); - dma_free_coherent(dma->dev, PAGE_SIZE, addr, - dma->dma_addr[i]); - } - kfree(dma->dma_addr); - dma->dma_addr = NULL; - kfree(dma->vaddr_pages); - dma->vaddr_pages = NULL; - vunmap(dma->vaddr); - dma->vaddr = NULL; - } - - if (dma->bus_addr) - dma->bus_addr = 0; - dma->direction = DMA_NONE; - - return 0; -} -EXPORT_SYMBOL_GPL(videobuf_dma_free); - -/* --------------------------------------------------------------------- */ - -static void videobuf_vm_open(struct vm_area_struct *vma) -{ - struct videobuf_mapping *map = vma->vm_private_data; - - dprintk(2, "vm_open %p [count=%d,vma=%08lx-%08lx]\n", map, - map->count, vma->vm_start, vma->vm_end); - - map->count++; -} - -static void videobuf_vm_close(struct vm_area_struct *vma) -{ - struct videobuf_mapping *map = vma->vm_private_data; - struct videobuf_queue *q = map->q; - struct videobuf_dma_sg_memory *mem; - int i; - - dprintk(2, "vm_close %p [count=%d,vma=%08lx-%08lx]\n", map, - map->count, vma->vm_start, vma->vm_end); - - map->count--; - if (0 == map->count) { - dprintk(1, "munmap %p q=%p\n", map, q); - videobuf_queue_lock(q); - for (i = 0; i < VIDEO_MAX_FRAME; i++) { - if (NULL == q->bufs[i]) - continue; - mem = q->bufs[i]->priv; - if (!mem) - continue; - - MAGIC_CHECK(mem->magic, MAGIC_SG_MEM); - - if (q->bufs[i]->map != map) - continue; - q->bufs[i]->map = NULL; - q->bufs[i]->baddr = 0; - q->ops->buf_release(q, q->bufs[i]); - } - videobuf_queue_unlock(q); - kfree(map); - } -} - -/* - * Get a anonymous page for the mapping. Make sure we can DMA to that - * memory location with 32bit PCI devices (i.e. don't use highmem for - * now ...). Bounce buffers don't work very well for the data rates - * video capture has. - */ -static vm_fault_t videobuf_vm_fault(struct vm_fault *vmf) -{ - struct vm_area_struct *vma = vmf->vma; - struct page *page; - - dprintk(3, "fault: fault @ %08lx [vma %08lx-%08lx]\n", - vmf->address, vma->vm_start, vma->vm_end); - - page = alloc_page(GFP_USER | __GFP_DMA32); - if (!page) - return VM_FAULT_OOM; - clear_user_highpage(page, vmf->address); - vmf->page = page; - - return 0; -} - -static const struct vm_operations_struct videobuf_vm_ops = { - .open = videobuf_vm_open, - .close = videobuf_vm_close, - .fault = videobuf_vm_fault, -}; - -/* --------------------------------------------------------------------- - * SG handlers for the generic methods - */ - -/* Allocated area consists on 3 parts: - struct video_buffer - struct _buffer (cx88_buffer, saa7134_buf, ...) - struct videobuf_dma_sg_memory - */ - -static struct videobuf_buffer *__videobuf_alloc_vb(size_t size) -{ - struct videobuf_dma_sg_memory *mem; - struct videobuf_buffer *vb; - - vb = kzalloc(size + sizeof(*mem), GFP_KERNEL); - if (!vb) - return vb; - - mem = vb->priv = ((char *)vb) + size; - mem->magic = MAGIC_SG_MEM; - - videobuf_dma_init(&mem->dma); - - dprintk(1, "%s: allocated at %p(%ld+%ld) & %p(%ld)\n", - __func__, vb, (long)sizeof(*vb), (long)size - sizeof(*vb), - mem, (long)sizeof(*mem)); - - return vb; -} - -static void *__videobuf_to_vaddr(struct videobuf_buffer *buf) -{ - struct videobuf_dma_sg_memory *mem = buf->priv; - BUG_ON(!mem); - - MAGIC_CHECK(mem->magic, MAGIC_SG_MEM); - - return mem->dma.vaddr; -} - -static int __videobuf_iolock(struct videobuf_queue *q, - struct videobuf_buffer *vb, - struct v4l2_framebuffer *fbuf) -{ - struct videobuf_dma_sg_memory *mem = vb->priv; - unsigned long pages; - dma_addr_t bus; - int err; - - BUG_ON(!mem); - - MAGIC_CHECK(mem->magic, MAGIC_SG_MEM); - - if (!mem->dma.dev) - mem->dma.dev = q->dev; - else - WARN_ON(mem->dma.dev != q->dev); - - switch (vb->memory) { - case V4L2_MEMORY_MMAP: - case V4L2_MEMORY_USERPTR: - if (0 == vb->baddr) { - /* no userspace addr -- kernel bounce buffer */ - pages = PAGE_ALIGN(vb->size) >> PAGE_SHIFT; - err = videobuf_dma_init_kernel(&mem->dma, - DMA_FROM_DEVICE, - pages); - if (0 != err) - return err; - } else if (vb->memory == V4L2_MEMORY_USERPTR) { - /* dma directly to userspace */ - err = videobuf_dma_init_user(&mem->dma, - DMA_FROM_DEVICE, - vb->baddr, vb->bsize); - if (0 != err) - return err; - } else { - /* NOTE: HACK: videobuf_iolock on V4L2_MEMORY_MMAP - buffers can only be called from videobuf_qbuf - we take current->mm->mmap_lock there, to prevent - locking inversion, so don't take it here */ - - err = videobuf_dma_init_user_locked(&mem->dma, - DMA_FROM_DEVICE, - vb->baddr, vb->bsize); - if (0 != err) - return err; - } - break; - case V4L2_MEMORY_OVERLAY: - if (NULL == fbuf) - return -EINVAL; - /* FIXME: need sanity checks for vb->boff */ - /* - * Using a double cast to avoid compiler warnings when - * building for PAE. Compiler doesn't like direct casting - * of a 32 bit ptr to 64 bit integer. - */ - bus = (dma_addr_t)(unsigned long)fbuf->base + vb->boff; - pages = PAGE_ALIGN(vb->size) >> PAGE_SHIFT; - err = videobuf_dma_init_overlay(&mem->dma, DMA_FROM_DEVICE, - bus, pages); - if (0 != err) - return err; - break; - default: - BUG(); - } - err = videobuf_dma_map(q->dev, &mem->dma); - if (0 != err) - return err; - - return 0; -} - -static int __videobuf_sync(struct videobuf_queue *q, - struct videobuf_buffer *buf) -{ - struct videobuf_dma_sg_memory *mem = buf->priv; - BUG_ON(!mem || !mem->dma.sglen); - - MAGIC_CHECK(mem->magic, MAGIC_SG_MEM); - MAGIC_CHECK(mem->dma.magic, MAGIC_DMABUF); - - dma_sync_sg_for_cpu(q->dev, mem->dma.sglist, - mem->dma.nr_pages, mem->dma.direction); - - return 0; -} - -static int __videobuf_mmap_mapper(struct videobuf_queue *q, - struct videobuf_buffer *buf, - struct vm_area_struct *vma) -{ - struct videobuf_dma_sg_memory *mem = buf->priv; - struct videobuf_mapping *map; - unsigned int first, last, size = 0, i; - int retval; - - retval = -EINVAL; - - BUG_ON(!mem); - MAGIC_CHECK(mem->magic, MAGIC_SG_MEM); - - /* look for first buffer to map */ - for (first = 0; first < VIDEO_MAX_FRAME; first++) { - if (buf == q->bufs[first]) { - size = PAGE_ALIGN(q->bufs[first]->bsize); - break; - } - } - - /* paranoia, should never happen since buf is always valid. */ - if (!size) { - dprintk(1, "mmap app bug: offset invalid [offset=0x%lx]\n", - (vma->vm_pgoff << PAGE_SHIFT)); - goto done; - } - - last = first; - - /* create mapping + update buffer list */ - retval = -ENOMEM; - map = kmalloc(sizeof(struct videobuf_mapping), GFP_KERNEL); - if (NULL == map) - goto done; - - size = 0; - for (i = first; i <= last; i++) { - if (NULL == q->bufs[i]) - continue; - q->bufs[i]->map = map; - q->bufs[i]->baddr = vma->vm_start + size; - size += PAGE_ALIGN(q->bufs[i]->bsize); - } - - map->count = 1; - map->q = q; - vma->vm_ops = &videobuf_vm_ops; - /* using shared anonymous pages */ - vm_flags_mod(vma, VM_DONTEXPAND | VM_DONTDUMP, VM_IO); - vma->vm_private_data = map; - dprintk(1, "mmap %p: q=%p %08lx-%08lx pgoff %08lx bufs %d-%d\n", - map, q, vma->vm_start, vma->vm_end, vma->vm_pgoff, first, last); - retval = 0; - -done: - return retval; -} - -static struct videobuf_qtype_ops sg_ops = { - .magic = MAGIC_QTYPE_OPS, - - .alloc_vb = __videobuf_alloc_vb, - .iolock = __videobuf_iolock, - .sync = __videobuf_sync, - .mmap_mapper = __videobuf_mmap_mapper, - .vaddr = __videobuf_to_vaddr, -}; - -void *videobuf_sg_alloc(size_t size) -{ - struct videobuf_queue q; - - /* Required to make generic handler to call __videobuf_alloc */ - q.int_ops = &sg_ops; - - q.msize = size; - - return videobuf_alloc_vb(&q); -} -EXPORT_SYMBOL_GPL(videobuf_sg_alloc); - -void videobuf_queue_sg_init(struct videobuf_queue *q, - const struct videobuf_queue_ops *ops, - struct device *dev, - spinlock_t *irqlock, - enum v4l2_buf_type type, - enum v4l2_field field, - unsigned int msize, - void *priv, - struct mutex *ext_lock) -{ - videobuf_queue_core_init(q, ops, dev, irqlock, type, field, msize, - priv, &sg_ops, ext_lock); -} -EXPORT_SYMBOL_GPL(videobuf_queue_sg_init); - diff --git a/drivers/media/v4l2-core/videobuf-vmalloc.c b/drivers/media/v4l2-core/videobuf-vmalloc.c deleted file mode 100644 index 85c7090606d6..000000000000 --- a/drivers/media/v4l2-core/videobuf-vmalloc.c +++ /dev/null @@ -1,326 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * helper functions for vmalloc video4linux capture buffers - * - * The functions expect the hardware being able to scatter gather - * (i.e. the buffers are not linear in physical memory, but fragmented - * into PAGE_SIZE chunks). They also assume the driver does not need - * to touch the video data. - * - * (c) 2007 Mauro Carvalho Chehab - */ - -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include - -#include - -#define MAGIC_DMABUF 0x17760309 -#define MAGIC_VMAL_MEM 0x18221223 - -#define MAGIC_CHECK(is, should) \ - if (unlikely((is) != (should))) { \ - printk(KERN_ERR "magic mismatch: %x (expected %x)\n", \ - is, should); \ - BUG(); \ - } - -static int debug; -module_param(debug, int, 0644); - -MODULE_DESCRIPTION("helper module to manage video4linux vmalloc buffers"); -MODULE_AUTHOR("Mauro Carvalho Chehab "); -MODULE_LICENSE("GPL"); - -#define dprintk(level, fmt, arg...) \ - if (debug >= level) \ - printk(KERN_DEBUG "vbuf-vmalloc: " fmt , ## arg) - - -/***************************************************************************/ - -static void videobuf_vm_open(struct vm_area_struct *vma) -{ - struct videobuf_mapping *map = vma->vm_private_data; - - dprintk(2, "vm_open %p [count=%u,vma=%08lx-%08lx]\n", map, - map->count, vma->vm_start, vma->vm_end); - - map->count++; -} - -static void videobuf_vm_close(struct vm_area_struct *vma) -{ - struct videobuf_mapping *map = vma->vm_private_data; - struct videobuf_queue *q = map->q; - int i; - - dprintk(2, "vm_close %p [count=%u,vma=%08lx-%08lx]\n", map, - map->count, vma->vm_start, vma->vm_end); - - map->count--; - if (0 == map->count) { - struct videobuf_vmalloc_memory *mem; - - dprintk(1, "munmap %p q=%p\n", map, q); - videobuf_queue_lock(q); - - /* We need first to cancel streams, before unmapping */ - if (q->streaming) - videobuf_queue_cancel(q); - - for (i = 0; i < VIDEO_MAX_FRAME; i++) { - if (NULL == q->bufs[i]) - continue; - - if (q->bufs[i]->map != map) - continue; - - mem = q->bufs[i]->priv; - if (mem) { - /* This callback is called only if kernel has - allocated memory and this memory is mmapped. - In this case, memory should be freed, - in order to do memory unmap. - */ - - MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM); - - /* vfree is not atomic - can't be - called with IRQ's disabled - */ - dprintk(1, "%s: buf[%d] freeing (%p)\n", - __func__, i, mem->vaddr); - - vfree(mem->vaddr); - mem->vaddr = NULL; - } - - q->bufs[i]->map = NULL; - q->bufs[i]->baddr = 0; - } - - kfree(map); - - videobuf_queue_unlock(q); - } - - return; -} - -static const struct vm_operations_struct videobuf_vm_ops = { - .open = videobuf_vm_open, - .close = videobuf_vm_close, -}; - -/* --------------------------------------------------------------------- - * vmalloc handlers for the generic methods - */ - -/* Allocated area consists on 3 parts: - struct video_buffer - struct _buffer (cx88_buffer, saa7134_buf, ...) - struct videobuf_dma_sg_memory - */ - -static struct videobuf_buffer *__videobuf_alloc_vb(size_t size) -{ - struct videobuf_vmalloc_memory *mem; - struct videobuf_buffer *vb; - - vb = kzalloc(size + sizeof(*mem), GFP_KERNEL); - if (!vb) - return vb; - - mem = vb->priv = ((char *)vb) + size; - mem->magic = MAGIC_VMAL_MEM; - - dprintk(1, "%s: allocated at %p(%ld+%ld) & %p(%ld)\n", - __func__, vb, (long)sizeof(*vb), (long)size - sizeof(*vb), - mem, (long)sizeof(*mem)); - - return vb; -} - -static int __videobuf_iolock(struct videobuf_queue *q, - struct videobuf_buffer *vb, - struct v4l2_framebuffer *fbuf) -{ - struct videobuf_vmalloc_memory *mem = vb->priv; - int pages; - - BUG_ON(!mem); - - MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM); - - switch (vb->memory) { - case V4L2_MEMORY_MMAP: - dprintk(1, "%s memory method MMAP\n", __func__); - - /* All handling should be done by __videobuf_mmap_mapper() */ - if (!mem->vaddr) { - printk(KERN_ERR "memory is not allocated/mmapped.\n"); - return -EINVAL; - } - break; - case V4L2_MEMORY_USERPTR: - pages = PAGE_ALIGN(vb->size); - - dprintk(1, "%s memory method USERPTR\n", __func__); - - if (vb->baddr) { - printk(KERN_ERR "USERPTR is currently not supported\n"); - return -EINVAL; - } - - /* The only USERPTR currently supported is the one needed for - * read() method. - */ - - mem->vaddr = vmalloc_user(pages); - if (!mem->vaddr) { - printk(KERN_ERR "vmalloc (%d pages) failed\n", pages); - return -ENOMEM; - } - dprintk(1, "vmalloc is at addr %p (%d pages)\n", - mem->vaddr, pages); - break; - case V4L2_MEMORY_OVERLAY: - default: - dprintk(1, "%s memory method OVERLAY/unknown\n", __func__); - - /* Currently, doesn't support V4L2_MEMORY_OVERLAY */ - printk(KERN_ERR "Memory method currently unsupported.\n"); - return -EINVAL; - } - - return 0; -} - -static int __videobuf_mmap_mapper(struct videobuf_queue *q, - struct videobuf_buffer *buf, - struct vm_area_struct *vma) -{ - struct videobuf_vmalloc_memory *mem; - struct videobuf_mapping *map; - int retval, pages; - - dprintk(1, "%s\n", __func__); - - /* create mapping + update buffer list */ - map = kzalloc(sizeof(struct videobuf_mapping), GFP_KERNEL); - if (NULL == map) - return -ENOMEM; - - buf->map = map; - map->q = q; - - buf->baddr = vma->vm_start; - - mem = buf->priv; - BUG_ON(!mem); - MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM); - - pages = PAGE_ALIGN(vma->vm_end - vma->vm_start); - mem->vaddr = vmalloc_user(pages); - if (!mem->vaddr) { - printk(KERN_ERR "vmalloc (%d pages) failed\n", pages); - goto error; - } - dprintk(1, "vmalloc is at addr %p (%d pages)\n", mem->vaddr, pages); - - /* Try to remap memory */ - retval = remap_vmalloc_range(vma, mem->vaddr, 0); - if (retval < 0) { - printk(KERN_ERR "mmap: remap failed with error %d. ", retval); - vfree(mem->vaddr); - goto error; - } - - vma->vm_ops = &videobuf_vm_ops; - vm_flags_set(vma, VM_DONTEXPAND | VM_DONTDUMP); - vma->vm_private_data = map; - - dprintk(1, "mmap %p: q=%p %08lx-%08lx (%lx) pgoff %08lx buf %d\n", - map, q, vma->vm_start, vma->vm_end, - (long int)buf->bsize, - vma->vm_pgoff, buf->i); - - videobuf_vm_open(vma); - - return 0; - -error: - mem = NULL; - kfree(map); - return -ENOMEM; -} - -static struct videobuf_qtype_ops qops = { - .magic = MAGIC_QTYPE_OPS, - - .alloc_vb = __videobuf_alloc_vb, - .iolock = __videobuf_iolock, - .mmap_mapper = __videobuf_mmap_mapper, - .vaddr = videobuf_to_vmalloc, -}; - -void videobuf_queue_vmalloc_init(struct videobuf_queue *q, - const struct videobuf_queue_ops *ops, - struct device *dev, - spinlock_t *irqlock, - enum v4l2_buf_type type, - enum v4l2_field field, - unsigned int msize, - void *priv, - struct mutex *ext_lock) -{ - videobuf_queue_core_init(q, ops, dev, irqlock, type, field, msize, - priv, &qops, ext_lock); -} -EXPORT_SYMBOL_GPL(videobuf_queue_vmalloc_init); - -void *videobuf_to_vmalloc(struct videobuf_buffer *buf) -{ - struct videobuf_vmalloc_memory *mem = buf->priv; - BUG_ON(!mem); - MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM); - - return mem->vaddr; -} -EXPORT_SYMBOL_GPL(videobuf_to_vmalloc); - -void videobuf_vmalloc_free(struct videobuf_buffer *buf) -{ - struct videobuf_vmalloc_memory *mem = buf->priv; - - /* mmapped memory can't be freed here, otherwise mmapped region - would be released, while still needed. In this case, the memory - release should happen inside videobuf_vm_close(). - So, it should free memory only if the memory were allocated for - read() operation. - */ - if ((buf->memory != V4L2_MEMORY_USERPTR) || buf->baddr) - return; - - if (!mem) - return; - - MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM); - - vfree(mem->vaddr); - mem->vaddr = NULL; - - return; -} -EXPORT_SYMBOL_GPL(videobuf_vmalloc_free); - diff --git a/include/media/videobuf-core.h b/include/media/videobuf-core.h deleted file mode 100644 index 2e01b2e9a1c0..000000000000 --- a/include/media/videobuf-core.h +++ /dev/null @@ -1,233 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * generic helper functions for handling video4linux capture buffers - * - * (c) 2007 Mauro Carvalho Chehab, - * - * Highly based on video-buf written originally by: - * (c) 2001,02 Gerd Knorr - * (c) 2006 Mauro Carvalho Chehab, - * (c) 2006 Ted Walther and John Sokol - */ - -#ifndef _VIDEOBUF_CORE_H -#define _VIDEOBUF_CORE_H - -#include -#include - -#define UNSET (-1U) - - -struct videobuf_buffer; -struct videobuf_queue; - -/* --------------------------------------------------------------------- */ - -/* - * A small set of helper functions to manage video4linux buffers. - * - * struct videobuf_buffer holds the data structures used by the helper - * functions, additionally some commonly used fields for v4l buffers - * (width, height, lists, waitqueue) are in there. That struct should - * be used as first element in the drivers buffer struct. - * - * about the mmap helpers (videobuf_mmap_*): - * - * The mmaper function allows to map any subset of contiguous buffers. - * This includes one mmap() call for all buffers (which the original - * video4linux API uses) as well as one mmap() for every single buffer - * (which v4l2 uses). - * - * If there is a valid mapping for a buffer, buffer->baddr/bsize holds - * userspace address + size which can be fed into the - * videobuf_dma_init_user function listed above. - * - */ - -struct videobuf_mapping { - unsigned int count; - struct videobuf_queue *q; -}; - -enum videobuf_state { - VIDEOBUF_NEEDS_INIT = 0, - VIDEOBUF_PREPARED = 1, - VIDEOBUF_QUEUED = 2, - VIDEOBUF_ACTIVE = 3, - VIDEOBUF_DONE = 4, - VIDEOBUF_ERROR = 5, - VIDEOBUF_IDLE = 6, -}; - -struct videobuf_buffer { - unsigned int i; - u32 magic; - - /* info about the buffer */ - unsigned int width; - unsigned int height; - unsigned int bytesperline; /* use only if != 0 */ - unsigned long size; - enum v4l2_field field; - enum videobuf_state state; - struct list_head stream; /* QBUF/DQBUF list */ - - /* touched by irq handler */ - struct list_head queue; - wait_queue_head_t done; - unsigned int field_count; - u64 ts; - - /* Memory type */ - enum v4l2_memory memory; - - /* buffer size */ - size_t bsize; - - /* buffer offset (mmap + overlay) */ - size_t boff; - - /* buffer addr (userland ptr!) */ - unsigned long baddr; - - /* for mmap'ed buffers */ - struct videobuf_mapping *map; - - /* Private pointer to allow specific methods to store their data */ - int privsize; - void *priv; -}; - -struct videobuf_queue_ops { - int (*buf_setup)(struct videobuf_queue *q, - unsigned int *count, unsigned int *size); - int (*buf_prepare)(struct videobuf_queue *q, - struct videobuf_buffer *vb, - enum v4l2_field field); - void (*buf_queue)(struct videobuf_queue *q, - struct videobuf_buffer *vb); - void (*buf_release)(struct videobuf_queue *q, - struct videobuf_buffer *vb); -}; - -#define MAGIC_QTYPE_OPS 0x12261003 - -/* Helper operations - device type dependent */ -struct videobuf_qtype_ops { - u32 magic; - - struct videobuf_buffer *(*alloc_vb)(size_t size); - void *(*vaddr) (struct videobuf_buffer *buf); - int (*iolock) (struct videobuf_queue *q, - struct videobuf_buffer *vb, - struct v4l2_framebuffer *fbuf); - int (*sync) (struct videobuf_queue *q, - struct videobuf_buffer *buf); - int (*mmap_mapper) (struct videobuf_queue *q, - struct videobuf_buffer *buf, - struct vm_area_struct *vma); -}; - -struct videobuf_queue { - struct mutex vb_lock; - struct mutex *ext_lock; - spinlock_t *irqlock; - struct device *dev; - - wait_queue_head_t wait; /* wait if queue is empty */ - - enum v4l2_buf_type type; - unsigned int msize; - enum v4l2_field field; - enum v4l2_field last; /* for field=V4L2_FIELD_ALTERNATE */ - struct videobuf_buffer *bufs[VIDEO_MAX_FRAME]; - const struct videobuf_queue_ops *ops; - struct videobuf_qtype_ops *int_ops; - - unsigned int streaming:1; - unsigned int reading:1; - - /* capture via mmap() + ioctl(QBUF/DQBUF) */ - struct list_head stream; - - /* capture via read() */ - unsigned int read_off; - struct videobuf_buffer *read_buf; - - /* driver private data */ - void *priv_data; -}; - -static inline void videobuf_queue_lock(struct videobuf_queue *q) -{ - if (!q->ext_lock) - mutex_lock(&q->vb_lock); -} - -static inline void videobuf_queue_unlock(struct videobuf_queue *q) -{ - if (!q->ext_lock) - mutex_unlock(&q->vb_lock); -} - -int videobuf_waiton(struct videobuf_queue *q, struct videobuf_buffer *vb, - int non_blocking, int intr); -int videobuf_iolock(struct videobuf_queue *q, struct videobuf_buffer *vb, - struct v4l2_framebuffer *fbuf); - -struct videobuf_buffer *videobuf_alloc_vb(struct videobuf_queue *q); - -/* Used on videobuf-dvb */ -void *videobuf_queue_to_vaddr(struct videobuf_queue *q, - struct videobuf_buffer *buf); - -void videobuf_queue_core_init(struct videobuf_queue *q, - const struct videobuf_queue_ops *ops, - struct device *dev, - spinlock_t *irqlock, - enum v4l2_buf_type type, - enum v4l2_field field, - unsigned int msize, - void *priv, - struct videobuf_qtype_ops *int_ops, - struct mutex *ext_lock); -int videobuf_queue_is_busy(struct videobuf_queue *q); -void videobuf_queue_cancel(struct videobuf_queue *q); - -enum v4l2_field videobuf_next_field(struct videobuf_queue *q); -int videobuf_reqbufs(struct videobuf_queue *q, - struct v4l2_requestbuffers *req); -int videobuf_querybuf(struct videobuf_queue *q, struct v4l2_buffer *b); -int videobuf_qbuf(struct videobuf_queue *q, - struct v4l2_buffer *b); -int videobuf_dqbuf(struct videobuf_queue *q, - struct v4l2_buffer *b, int nonblocking); -int videobuf_streamon(struct videobuf_queue *q); -int videobuf_streamoff(struct videobuf_queue *q); - -void videobuf_stop(struct videobuf_queue *q); - -int videobuf_read_start(struct videobuf_queue *q); -void videobuf_read_stop(struct videobuf_queue *q); -ssize_t videobuf_read_stream(struct videobuf_queue *q, - char __user *data, size_t count, loff_t *ppos, - int vbihack, int nonblocking); -ssize_t videobuf_read_one(struct videobuf_queue *q, - char __user *data, size_t count, loff_t *ppos, - int nonblocking); -__poll_t videobuf_poll_stream(struct file *file, - struct videobuf_queue *q, - poll_table *wait); - -int videobuf_mmap_setup(struct videobuf_queue *q, - unsigned int bcount, unsigned int bsize, - enum v4l2_memory memory); -int __videobuf_mmap_setup(struct videobuf_queue *q, - unsigned int bcount, unsigned int bsize, - enum v4l2_memory memory); -int videobuf_mmap_free(struct videobuf_queue *q); -int videobuf_mmap_mapper(struct videobuf_queue *q, - struct vm_area_struct *vma); - -#endif diff --git a/include/media/videobuf-dma-contig.h b/include/media/videobuf-dma-contig.h deleted file mode 100644 index 525883b2c53e..000000000000 --- a/include/media/videobuf-dma-contig.h +++ /dev/null @@ -1,30 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * helper functions for physically contiguous capture buffers - * - * The functions support hardware lacking scatter gather support - * (i.e. the buffers must be linear in physical memory) - * - * Copyright (c) 2008 Magnus Damm - */ -#ifndef _VIDEOBUF_DMA_CONTIG_H -#define _VIDEOBUF_DMA_CONTIG_H - -#include -#include - -void videobuf_queue_dma_contig_init(struct videobuf_queue *q, - const struct videobuf_queue_ops *ops, - struct device *dev, - spinlock_t *irqlock, - enum v4l2_buf_type type, - enum v4l2_field field, - unsigned int msize, - void *priv, - struct mutex *ext_lock); - -dma_addr_t videobuf_to_dma_contig(struct videobuf_buffer *buf); -void videobuf_dma_contig_free(struct videobuf_queue *q, - struct videobuf_buffer *buf); - -#endif /* _VIDEOBUF_DMA_CONTIG_H */ diff --git a/include/media/videobuf-dma-sg.h b/include/media/videobuf-dma-sg.h deleted file mode 100644 index 930ff8d454fc..000000000000 --- a/include/media/videobuf-dma-sg.h +++ /dev/null @@ -1,102 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * helper functions for SG DMA video4linux capture buffers - * - * The functions expect the hardware being able to scatter gather - * (i.e. the buffers are not linear in physical memory, but fragmented - * into PAGE_SIZE chunks). They also assume the driver does not need - * to touch the video data. - * - * (c) 2007 Mauro Carvalho Chehab, - * - * Highly based on video-buf written originally by: - * (c) 2001,02 Gerd Knorr - * (c) 2006 Mauro Carvalho Chehab, - * (c) 2006 Ted Walther and John Sokol - */ -#ifndef _VIDEOBUF_DMA_SG_H -#define _VIDEOBUF_DMA_SG_H - -#include - -/* --------------------------------------------------------------------- */ - -/* - * A small set of helper functions to manage buffers (both userland - * and kernel) for DMA. - * - * videobuf_dma_init_*() - * creates a buffer. The userland version takes a userspace - * pointer + length. The kernel version just wants the size and - * does memory allocation too using vmalloc_32(). - * - * videobuf_dma_*() - * see Documentation/core-api/dma-api-howto.rst, these functions to - * basically the same. The map function does also build a - * scatterlist for the buffer (and unmap frees it ...) - * - * videobuf_dma_free() - * no comment ... - * - */ - -struct videobuf_dmabuf { - u32 magic; - - /* for userland buffer */ - int offset; - size_t size; - struct page **pages; - - /* for kernel buffers */ - void *vaddr; - struct page **vaddr_pages; - dma_addr_t *dma_addr; - struct device *dev; - - /* for overlay buffers (pci-pci dma) */ - dma_addr_t bus_addr; - - /* common */ - struct scatterlist *sglist; - int sglen; - unsigned long nr_pages; - int direction; -}; - -struct videobuf_dma_sg_memory { - u32 magic; - - /* for mmap'ed buffers */ - struct videobuf_dmabuf dma; -}; - -/* - * Scatter-gather DMA buffer API. - * - * These functions provide a simple way to create a page list and a - * scatter-gather list from a kernel, userspace of physical address and map the - * memory for DMA operation. - * - * Despite the name, this is totally unrelated to videobuf, except that - * videobuf-dma-sg uses the same API internally. - */ -int videobuf_dma_free(struct videobuf_dmabuf *dma); - -int videobuf_dma_unmap(struct device *dev, struct videobuf_dmabuf *dma); -struct videobuf_dmabuf *videobuf_to_dma(struct videobuf_buffer *buf); - -void *videobuf_sg_alloc(size_t size); - -void videobuf_queue_sg_init(struct videobuf_queue *q, - const struct videobuf_queue_ops *ops, - struct device *dev, - spinlock_t *irqlock, - enum v4l2_buf_type type, - enum v4l2_field field, - unsigned int msize, - void *priv, - struct mutex *ext_lock); - -#endif /* _VIDEOBUF_DMA_SG_H */ - diff --git a/include/media/videobuf-vmalloc.h b/include/media/videobuf-vmalloc.h deleted file mode 100644 index e930dbb9d7f4..000000000000 --- a/include/media/videobuf-vmalloc.h +++ /dev/null @@ -1,43 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * helper functions for vmalloc capture buffers - * - * The functions expect the hardware being able to scatter gather - * (i.e. the buffers are not linear in physical memory, but fragmented - * into PAGE_SIZE chunks). They also assume the driver does not need - * to touch the video data. - * - * (c) 2007 Mauro Carvalho Chehab, - */ -#ifndef _VIDEOBUF_VMALLOC_H -#define _VIDEOBUF_VMALLOC_H - -#include - -/* --------------------------------------------------------------------- */ - -struct videobuf_vmalloc_memory { - u32 magic; - - void *vaddr; - - /* remap_vmalloc_range seems to need to run - * after mmap() on some cases */ - struct vm_area_struct *vma; -}; - -void videobuf_queue_vmalloc_init(struct videobuf_queue *q, - const struct videobuf_queue_ops *ops, - struct device *dev, - spinlock_t *irqlock, - enum v4l2_buf_type type, - enum v4l2_field field, - unsigned int msize, - void *priv, - struct mutex *ext_lock); - -void *videobuf_to_vmalloc(struct videobuf_buffer *buf); - -void videobuf_vmalloc_free(struct videobuf_buffer *buf); - -#endif -- cgit From d62d8e7b59f9d7ed9b6eaaa788fee0d727b7d3ad Mon Sep 17 00:00:00 2001 From: Marvin Lin Date: Fri, 22 Sep 2023 14:24:02 +0800 Subject: media: v4l: Add HEXTILE compressed format Add HEXTILE compressed format which is defined in Remote Framebuffer Protocol (RFC 6143, chapter 7.7.4 Hextile Encoding) and is used by Encoding Compression Engine (ECE) present on Nuvoton NPCM SoCs. Signed-off-by: Marvin Lin Reviewed-by: Nicolas Dufresne Signed-off-by: Hans Verkuil --- Documentation/userspace-api/media/v4l/pixfmt-reserved.rst | 7 +++++++ drivers/media/v4l2-core/v4l2-ioctl.c | 1 + include/uapi/linux/videodev2.h | 1 + 3 files changed, 9 insertions(+) (limited to 'include') diff --git a/Documentation/userspace-api/media/v4l/pixfmt-reserved.rst b/Documentation/userspace-api/media/v4l/pixfmt-reserved.rst index 296ad2025e8d..886ba7b08d6b 100644 --- a/Documentation/userspace-api/media/v4l/pixfmt-reserved.rst +++ b/Documentation/userspace-api/media/v4l/pixfmt-reserved.rst @@ -288,6 +288,13 @@ please make a proposal on the linux-media mailing list. - 'MT2110R' - This format is two-planar 10-Bit raster mode and having similitude with ``V4L2_PIX_FMT_MM21`` in term of alignment and tiling. Used for AVC. + * .. _V4L2-PIX-FMT-HEXTILE: + + - ``V4L2_PIX_FMT_HEXTILE`` + - 'HXTL' + - Compressed format used by Nuvoton NPCM video driver. This format is + defined in Remote Framebuffer Protocol (RFC 6143, chapter 7.7.4 Hextile + Encoding). .. raw:: latex \normalsize diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c index f4d9d6279094..9b1de54ce379 100644 --- a/drivers/media/v4l2-core/v4l2-ioctl.c +++ b/drivers/media/v4l2-core/v4l2-ioctl.c @@ -1510,6 +1510,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) case V4L2_PIX_FMT_AV1_FRAME: descr = "AV1 Frame"; break; case V4L2_PIX_FMT_MT2110T: descr = "Mediatek 10bit Tile Mode"; break; case V4L2_PIX_FMT_MT2110R: descr = "Mediatek 10bit Raster Mode"; break; + case V4L2_PIX_FMT_HEXTILE: descr = "Hextile Compressed Format"; break; default: if (fmt->description[0]) return; diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h index 78260e5d9985..c3d4e490ce7c 100644 --- a/include/uapi/linux/videodev2.h +++ b/include/uapi/linux/videodev2.h @@ -804,6 +804,7 @@ struct v4l2_pix_format { #define V4L2_PIX_FMT_QC08C v4l2_fourcc('Q', '0', '8', 'C') /* Qualcomm 8-bit compressed */ #define V4L2_PIX_FMT_QC10C v4l2_fourcc('Q', '1', '0', 'C') /* Qualcomm 10-bit compressed */ #define V4L2_PIX_FMT_AJPG v4l2_fourcc('A', 'J', 'P', 'G') /* Aspeed JPEG */ +#define V4L2_PIX_FMT_HEXTILE v4l2_fourcc('H', 'X', 'T', 'L') /* Hextile compressed */ /* 10bit raw packed, 32 bytes for every 25 pixels, last LSB 6 bits unused */ #define V4L2_PIX_FMT_IPU3_SBGGR10 v4l2_fourcc('i', 'p', '3', 'b') /* IPU3 packed 10-bit BGGR bayer */ -- cgit From 2817154cd18942cd89e254d3764a378518a3270f Mon Sep 17 00:00:00 2001 From: Marvin Lin Date: Fri, 22 Sep 2023 14:24:03 +0800 Subject: media: v4l2-ctrls: Add user control base for Nuvoton NPCM controls Add a control base for Nuvoton NPCM driver controls, and reserve 16 controls. Signed-off-by: Marvin Lin Signed-off-by: Hans Verkuil --- include/uapi/linux/v4l2-controls.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include') diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h index c3604a0a3e30..68db66d4aae8 100644 --- a/include/uapi/linux/v4l2-controls.h +++ b/include/uapi/linux/v4l2-controls.h @@ -203,6 +203,12 @@ enum v4l2_colorfx { */ #define V4L2_CID_USER_ASPEED_BASE (V4L2_CID_USER_BASE + 0x11a0) +/* + * The base for Nuvoton NPCM driver controls. + * We reserve 16 controls for this driver. + */ +#define V4L2_CID_USER_NPCM_BASE (V4L2_CID_USER_BASE + 0x11b0) + /* MPEG-class control IDs */ /* The MPEG controls are applicable to all codec controls * and the 'MPEG' part of the define is historical */ -- cgit From 1568583b3977f232e6e7a652fd4be95a11d0ecae Mon Sep 17 00:00:00 2001 From: Marvin Lin Date: Fri, 22 Sep 2023 14:24:04 +0800 Subject: media: uapi: Add controls for NPCM video driver Create controls for Nuvoton NPCM video driver to support setting capture mode of Video Capture/Differentiation (VCD) engine and getting the count of HEXTILE rectangles that is compressed by Encoding Compression Engine (ECE). Signed-off-by: Marvin Lin Signed-off-by: Hans Verkuil --- .../userspace-api/media/drivers/index.rst | 1 + .../userspace-api/media/drivers/npcm-video.rst | 66 ++++++++++++++++++++++ include/uapi/linux/npcm-video.h | 41 ++++++++++++++ 3 files changed, 108 insertions(+) create mode 100644 Documentation/userspace-api/media/drivers/npcm-video.rst create mode 100644 include/uapi/linux/npcm-video.h (limited to 'include') diff --git a/Documentation/userspace-api/media/drivers/index.rst b/Documentation/userspace-api/media/drivers/index.rst index 6708d649afd7..783f92f01a4c 100644 --- a/Documentation/userspace-api/media/drivers/index.rst +++ b/Documentation/userspace-api/media/drivers/index.rst @@ -37,6 +37,7 @@ For more details see the file COPYING in the source distribution of Linux. dw100 imx-uapi max2175 + npcm-video omap3isp-uapi st-vgxy61 uvcvideo diff --git a/Documentation/userspace-api/media/drivers/npcm-video.rst b/Documentation/userspace-api/media/drivers/npcm-video.rst new file mode 100644 index 000000000000..b47771dd8b27 --- /dev/null +++ b/Documentation/userspace-api/media/drivers/npcm-video.rst @@ -0,0 +1,66 @@ +.. SPDX-License-Identifier: GPL-2.0 + +.. include:: + +NPCM video driver +================= + +This driver is used to control the Video Capture/Differentiation (VCD) engine +and Encoding Compression Engine (ECE) present on Nuvoton NPCM SoCs. The VCD can +capture a frame from digital video input and compare two frames in memory, and +the ECE can compress the frame data into HEXTILE format. + +Driver-specific Controls +------------------------ + +V4L2_CID_NPCM_CAPTURE_MODE +~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The VCD engine supports two modes: + +- COMPLETE mode: + + Capture the next complete frame into memory. + +- DIFF mode: + + Compare the incoming frame with the frame stored in memory, and updates the + differentiated frame in memory. + +Application can use ``V4L2_CID_NPCM_CAPTURE_MODE`` control to set the VCD mode +with different control values (enum v4l2_npcm_capture_mode): + +- ``V4L2_NPCM_CAPTURE_MODE_COMPLETE``: will set VCD to COMPLETE mode. +- ``V4L2_NPCM_CAPTURE_MODE_DIFF``: will set VCD to DIFF mode. + +V4L2_CID_NPCM_RECT_COUNT +~~~~~~~~~~~~~~~~~~~~~~~~ + +If using V4L2_PIX_FMT_HEXTILE format, VCD will capture frame data and then ECE +will compress the data into HEXTILE rectangles and store them in V4L2 video +buffer with the layout defined in Remote Framebuffer Protocol: +:: + + (RFC 6143, https://www.rfc-editor.org/rfc/rfc6143.html#section-7.6.1) + + +--------------+--------------+-------------------+ + | No. of bytes | Type [Value] | Description | + +--------------+--------------+-------------------+ + | 2 | U16 | x-position | + | 2 | U16 | y-position | + | 2 | U16 | width | + | 2 | U16 | height | + | 4 | S32 | encoding-type (5) | + +--------------+--------------+-------------------+ + | HEXTILE rectangle data | + +-------------------------------------------------+ + +Application can get the video buffer through VIDIOC_DQBUF, and followed by +calling ``V4L2_CID_NPCM_RECT_COUNT`` control to get the number of HEXTILE +rectangles in this buffer. + +References +---------- +include/uapi/linux/npcm-video.h + +**Copyright** |copy| 2022 Nuvoton Technologies diff --git a/include/uapi/linux/npcm-video.h b/include/uapi/linux/npcm-video.h new file mode 100644 index 000000000000..1d39f6f38c96 --- /dev/null +++ b/include/uapi/linux/npcm-video.h @@ -0,0 +1,41 @@ +/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ +/* + * Controls header for NPCM video driver + * + * Copyright (C) 2022 Nuvoton Technologies + */ + +#ifndef _UAPI_LINUX_NPCM_VIDEO_H +#define _UAPI_LINUX_NPCM_VIDEO_H + +#include + +/* + * Check Documentation/userspace-api/media/drivers/npcm-video.rst for control + * details. + */ + +/* + * This control is meant to set the mode of NPCM Video Capture/Differentiation + * (VCD) engine. + * + * The VCD engine supports two modes: + * COMPLETE - Capture the next complete frame into memory. + * DIFF - Compare the incoming frame with the frame stored in memory, and + * updates the differentiated frame in memory. + */ +#define V4L2_CID_NPCM_CAPTURE_MODE (V4L2_CID_USER_NPCM_BASE + 0) + +enum v4l2_npcm_capture_mode { + V4L2_NPCM_CAPTURE_MODE_COMPLETE = 0, /* COMPLETE mode */ + V4L2_NPCM_CAPTURE_MODE_DIFF = 1, /* DIFF mode */ +}; + +/* + * This control is meant to get the count of compressed HEXTILE rectangles which + * is relevant to the number of differentiated frames if VCD is in DIFF mode. + * And the count will always be 1 if VCD is in COMPLETE mode. + */ +#define V4L2_CID_NPCM_RECT_COUNT (V4L2_CID_USER_NPCM_BASE + 1) + +#endif /* _UAPI_LINUX_NPCM_VIDEO_H */ -- cgit From 83d0d4cc1423194b580356966107379490edd02e Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sat, 23 Sep 2023 17:20:49 +0200 Subject: media: ipu-bridge: increase sensor_name size Fixes this compiler warning: In file included from include/linux/property.h:14, from include/linux/acpi.h:16, from drivers/media/pci/intel/ipu-bridge.c:4: In function 'ipu_bridge_init_swnode_names', inlined from 'ipu_bridge_create_connection_swnodes' at drivers/media/pci/intel/ipu-bridge.c:445:2, inlined from 'ipu_bridge_connect_sensor' at drivers/media/pci/intel/ipu-bridge.c:656:3: include/linux/fwnode.h:81:49: warning: '%u' directive output may be truncated writing between 1 and 3 bytes into a region of size 2 [-Wformat-truncation=] 81 | #define SWNODE_GRAPH_PORT_NAME_FMT "port@%u" | ^~~~~~~~~ drivers/media/pci/intel/ipu-bridge.c:384:18: note: in expansion of macro 'SWNODE_GRAPH_PORT_NAME_FMT' 384 | SWNODE_GRAPH_PORT_NAME_FMT, sensor->link); | ^~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/fwnode.h: In function 'ipu_bridge_connect_sensor': include/linux/fwnode.h:81:55: note: format string is defined here 81 | #define SWNODE_GRAPH_PORT_NAME_FMT "port@%u" | ^~ In function 'ipu_bridge_init_swnode_names', inlined from 'ipu_bridge_create_connection_swnodes' at drivers/media/pci/intel/ipu-bridge.c:445:2, inlined from 'ipu_bridge_connect_sensor' at drivers/media/pci/intel/ipu-bridge.c:656:3: include/linux/fwnode.h:81:49: note: directive argument in the range [0, 255] 81 | #define SWNODE_GRAPH_PORT_NAME_FMT "port@%u" | ^~~~~~~~~ drivers/media/pci/intel/ipu-bridge.c:384:18: note: in expansion of macro 'SWNODE_GRAPH_PORT_NAME_FMT' 384 | SWNODE_GRAPH_PORT_NAME_FMT, sensor->link); | ^~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/media/pci/intel/ipu-bridge.c:382:9: note: 'snprintf' output between 7 and 9 bytes into a destination of size 7 382 | snprintf(sensor->node_names.remote_port, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 383 | sizeof(sensor->node_names.remote_port), | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 384 | SWNODE_GRAPH_PORT_NAME_FMT, sensor->link); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Signed-off-by: Hans Verkuil Acked-by: Arnd Bergmann --- include/media/ipu-bridge.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include') diff --git a/include/media/ipu-bridge.h b/include/media/ipu-bridge.h index bdc654a45521..783bda6d5cc3 100644 --- a/include/media/ipu-bridge.h +++ b/include/media/ipu-bridge.h @@ -108,7 +108,7 @@ struct ipu_node_names { char ivsc_sensor_port[7]; char ivsc_ipu_port[7]; char endpoint[11]; - char remote_port[7]; + char remote_port[9]; char vcm[16]; }; -- cgit From 7ba5e7b78b068e212c85926723990482ee7b1962 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sat, 23 Sep 2023 17:20:52 +0200 Subject: media: cec.h: increase input_phys buffer Fixes this compiler warning: drivers/media/cec/core/cec-core.c: In function 'cec_allocate_adapter': drivers/media/cec/core/cec-core.c:317:21: warning: '/input0' directive output may be truncated writing 7 bytes into a region of size between 1 and 32 [-Wformat-truncation=] 317 | "%s/input0", adap->name); | ^~~~~~~ drivers/media/cec/core/cec-core.c:316:9: note: 'snprintf' output between 8 and 39 bytes into a destination of size 32 316 | snprintf(adap->input_phys, sizeof(adap->input_phys), | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 317 | "%s/input0", adap->name); | ~~~~~~~~~~~~~~~~~~~~~~~~ Signed-off-by: Hans Verkuil --- include/media/cec.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include') diff --git a/include/media/cec.h b/include/media/cec.h index 9c007f83569a..53e4b2eb2b26 100644 --- a/include/media/cec.h +++ b/include/media/cec.h @@ -275,7 +275,7 @@ struct cec_adapter { u32 sequence; - char input_phys[32]; + char input_phys[40]; }; static inline void *cec_get_drvdata(const struct cec_adapter *adap) -- cgit From 9cc0f40cac6ae5bc8529caa5e9d477678336450c Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sat, 23 Sep 2023 17:20:55 +0200 Subject: media: v4l2-dev.h: increase struct video_device name size Increase the size of the name field to prevent a lot of string truncate compiler warnings. Signed-off-by: Hans Verkuil --- include/media/v4l2-dev.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include') diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h index e0a13505f88d..d82dfdbf6e58 100644 --- a/include/media/v4l2-dev.h +++ b/include/media/v4l2-dev.h @@ -284,7 +284,7 @@ struct video_device { struct v4l2_prio_state *prio; /* device info */ - char name[32]; + char name[64]; enum vfl_devnode_type vfl_type; enum vfl_devnode_direction vfl_dir; int minor; -- cgit From d9d432af1415b358d76b110c9e37e4f07d2e1c7b Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sat, 23 Sep 2023 17:20:56 +0200 Subject: media: v4l2-subdev.h: increase struct v4l2_subdev name size This resolves a lot of the string truncate compiler warnings. Signed-off-by: Hans Verkuil --- drivers/staging/media/omap4iss/iss_csi2.c | 2 +- include/media/v4l2-subdev.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'include') diff --git a/drivers/staging/media/omap4iss/iss_csi2.c b/drivers/staging/media/omap4iss/iss_csi2.c index 04ce0e7eb557..d2844414de4f 100644 --- a/drivers/staging/media/omap4iss/iss_csi2.c +++ b/drivers/staging/media/omap4iss/iss_csi2.c @@ -1260,7 +1260,7 @@ static int csi2_init_entities(struct iss_csi2_device *csi2, const char *subname) struct media_pad *pads = csi2->pads; struct media_entity *me = &sd->entity; int ret; - char name[V4L2_SUBDEV_NAME_SIZE]; + char name[32]; v4l2_subdev_init(sd, &csi2_ops); sd->internal_ops = &csi2_internal_ops; diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index 5f59ff0796b7..5711354056b9 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -951,7 +951,7 @@ struct v4l2_subdev_internal_ops { void (*release)(struct v4l2_subdev *sd); }; -#define V4L2_SUBDEV_NAME_SIZE 32 +#define V4L2_SUBDEV_NAME_SIZE 52 /* Set this flag if this subdev is a i2c device. */ #define V4L2_SUBDEV_FL_IS_I2C (1U << 0) -- cgit From 8cdd708f11655d5f28fca1ab2fa0dbe5424f274c Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sat, 23 Sep 2023 17:20:57 +0200 Subject: media: use sizeof() instead of V4L2_SUBDEV_NAME_SIZE MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Don't rely on a define, let the compiler use the actual field size. Remove all uses of the V4L2_SUBDEV_NAME_SIZE define and also drop the define itself. Signed-off-by: Hans Verkuil Reviewed-by: Laurent Pinchart Reviewed-by: Niklas Söderlund Reviewed-by: Maxime Ripard Reviewed-by: Luca Ceresoli Tested-by: Luca Ceresoli --- drivers/media/i2c/msp3400-driver.c | 2 +- drivers/media/platform/cadence/cdns-csi2rx.c | 4 ++-- drivers/media/platform/cadence/cdns-csi2tx.c | 4 ++-- drivers/media/platform/renesas/rcar-isp.c | 2 +- drivers/media/platform/renesas/rcar-vin/rcar-csi2.c | 2 +- drivers/media/platform/ti/omap3isp/ispstat.c | 2 +- drivers/staging/media/tegra-video/csi.c | 4 ++-- drivers/staging/media/tegra-video/vip.c | 2 +- include/media/v4l2-subdev.h | 4 +--- 9 files changed, 12 insertions(+), 14 deletions(-) (limited to 'include') diff --git a/drivers/media/i2c/msp3400-driver.c b/drivers/media/i2c/msp3400-driver.c index bec76801487a..0ed8561edfee 100644 --- a/drivers/media/i2c/msp3400-driver.c +++ b/drivers/media/i2c/msp3400-driver.c @@ -561,7 +561,7 @@ static int msp_log_status(struct v4l2_subdev *sd) struct msp_state *state = to_state(sd); struct i2c_client *client = v4l2_get_subdevdata(sd); const char *p; - char prefix[V4L2_SUBDEV_NAME_SIZE + 20]; + char prefix[sizeof(sd->name) + 20]; if (state->opmode == OPMODE_AUTOSELECT) msp_detect_stereo(client); diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c index 0d879d71d818..b9d9058e2ce3 100644 --- a/drivers/media/platform/cadence/cdns-csi2rx.c +++ b/drivers/media/platform/cadence/cdns-csi2rx.c @@ -516,8 +516,8 @@ static int csi2rx_probe(struct platform_device *pdev) csi2rx->subdev.dev = &pdev->dev; v4l2_subdev_init(&csi2rx->subdev, &csi2rx_subdev_ops); v4l2_set_subdevdata(&csi2rx->subdev, &pdev->dev); - snprintf(csi2rx->subdev.name, V4L2_SUBDEV_NAME_SIZE, "%s.%s", - KBUILD_MODNAME, dev_name(&pdev->dev)); + snprintf(csi2rx->subdev.name, sizeof(csi2rx->subdev.name), + "%s.%s", KBUILD_MODNAME, dev_name(&pdev->dev)); /* Create our media pads */ csi2rx->subdev.entity.function = MEDIA_ENT_F_VID_IF_BRIDGE; diff --git a/drivers/media/platform/cadence/cdns-csi2tx.c b/drivers/media/platform/cadence/cdns-csi2tx.c index cbbb77520112..c115742f347f 100644 --- a/drivers/media/platform/cadence/cdns-csi2tx.c +++ b/drivers/media/platform/cadence/cdns-csi2tx.c @@ -592,8 +592,8 @@ static int csi2tx_probe(struct platform_device *pdev) csi2tx->subdev.owner = THIS_MODULE; csi2tx->subdev.dev = &pdev->dev; csi2tx->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; - snprintf(csi2tx->subdev.name, V4L2_SUBDEV_NAME_SIZE, "%s.%s", - KBUILD_MODNAME, dev_name(&pdev->dev)); + snprintf(csi2tx->subdev.name, sizeof(csi2tx->subdev.name), + "%s.%s", KBUILD_MODNAME, dev_name(&pdev->dev)); ret = csi2tx_check_lanes(csi2tx); if (ret) diff --git a/drivers/media/platform/renesas/rcar-isp.c b/drivers/media/platform/renesas/rcar-isp.c index 7360cf3863f2..19a005d83733 100644 --- a/drivers/media/platform/renesas/rcar-isp.c +++ b/drivers/media/platform/renesas/rcar-isp.c @@ -467,7 +467,7 @@ static int risp_probe(struct platform_device *pdev) isp->subdev.dev = &pdev->dev; v4l2_subdev_init(&isp->subdev, &rcar_isp_subdev_ops); v4l2_set_subdevdata(&isp->subdev, &pdev->dev); - snprintf(isp->subdev.name, V4L2_SUBDEV_NAME_SIZE, "%s %s", + snprintf(isp->subdev.name, sizeof(isp->subdev.name), "%s %s", KBUILD_MODNAME, dev_name(&pdev->dev)); isp->subdev.flags = V4L2_SUBDEV_FL_HAS_DEVNODE; diff --git a/drivers/media/platform/renesas/rcar-vin/rcar-csi2.c b/drivers/media/platform/renesas/rcar-vin/rcar-csi2.c index f6326df0b09b..66fe553a00e7 100644 --- a/drivers/media/platform/renesas/rcar-vin/rcar-csi2.c +++ b/drivers/media/platform/renesas/rcar-vin/rcar-csi2.c @@ -1889,7 +1889,7 @@ static int rcsi2_probe(struct platform_device *pdev) priv->subdev.dev = &pdev->dev; v4l2_subdev_init(&priv->subdev, &rcar_csi2_subdev_ops); v4l2_set_subdevdata(&priv->subdev, &pdev->dev); - snprintf(priv->subdev.name, V4L2_SUBDEV_NAME_SIZE, "%s %s", + snprintf(priv->subdev.name, sizeof(priv->subdev.name), "%s %s", KBUILD_MODNAME, dev_name(&pdev->dev)); priv->subdev.flags = V4L2_SUBDEV_FL_HAS_DEVNODE; diff --git a/drivers/media/platform/ti/omap3isp/ispstat.c b/drivers/media/platform/ti/omap3isp/ispstat.c index 68cf68dbcace..359a846205b0 100644 --- a/drivers/media/platform/ti/omap3isp/ispstat.c +++ b/drivers/media/platform/ti/omap3isp/ispstat.c @@ -1039,7 +1039,7 @@ static int isp_stat_init_entities(struct ispstat *stat, const char *name, struct media_entity *me = &subdev->entity; v4l2_subdev_init(subdev, sd_ops); - snprintf(subdev->name, V4L2_SUBDEV_NAME_SIZE, "OMAP3 ISP %s", name); + snprintf(subdev->name, sizeof(subdev->name), "OMAP3 ISP %s", name); subdev->grp_id = BIT(16); /* group ID for isp subdevs */ subdev->flags |= V4L2_SUBDEV_FL_HAS_EVENTS | V4L2_SUBDEV_FL_HAS_DEVNODE; v4l2_set_subdevdata(subdev, stat); diff --git a/drivers/staging/media/tegra-video/csi.c b/drivers/staging/media/tegra-video/csi.c index e79657920dc8..9aa72863c213 100644 --- a/drivers/staging/media/tegra-video/csi.c +++ b/drivers/staging/media/tegra-video/csi.c @@ -607,10 +607,10 @@ static int tegra_csi_channel_init(struct tegra_csi_channel *chan) v4l2_subdev_init(subdev, &tegra_csi_ops); subdev->dev = csi->dev; if (IS_ENABLED(CONFIG_VIDEO_TEGRA_TPG)) - snprintf(subdev->name, V4L2_SUBDEV_NAME_SIZE, "%s-%d", "tpg", + snprintf(subdev->name, sizeof(subdev->name), "%s-%d", "tpg", chan->csi_port_nums[0]); else - snprintf(subdev->name, V4L2_SUBDEV_NAME_SIZE, "%s", + snprintf(subdev->name, sizeof(subdev->name), "%s", kbasename(chan->of_node->full_name)); v4l2_set_subdevdata(subdev, chan); diff --git a/drivers/staging/media/tegra-video/vip.c b/drivers/staging/media/tegra-video/vip.c index 191ecd19a6a7..e95cc7bb190e 100644 --- a/drivers/staging/media/tegra-video/vip.c +++ b/drivers/staging/media/tegra-video/vip.c @@ -163,7 +163,7 @@ static int tegra_vip_channel_init(struct tegra_vip *vip) subdev = &vip->chan.subdev; v4l2_subdev_init(subdev, &tegra_vip_ops); subdev->dev = vip->dev; - snprintf(subdev->name, V4L2_SUBDEV_NAME_SIZE, "%s", + snprintf(subdev->name, sizeof(subdev->name), "%s", kbasename(vip->chan.of_node->full_name)); v4l2_set_subdevdata(subdev, &vip->chan); diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index 5711354056b9..c1f90c1223a7 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -951,8 +951,6 @@ struct v4l2_subdev_internal_ops { void (*release)(struct v4l2_subdev *sd); }; -#define V4L2_SUBDEV_NAME_SIZE 52 - /* Set this flag if this subdev is a i2c device. */ #define V4L2_SUBDEV_FL_IS_I2C (1U << 0) /* Set this flag if this subdev is a spi device. */ @@ -1062,7 +1060,7 @@ struct v4l2_subdev { const struct v4l2_subdev_ops *ops; const struct v4l2_subdev_internal_ops *internal_ops; struct v4l2_ctrl_handler *ctrl_handler; - char name[V4L2_SUBDEV_NAME_SIZE]; + char name[52]; u32 grp_id; void *dev_priv; void *host_priv; -- cgit From 06016a67c61675642c71358c2afe6ce99b5d1468 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sat, 23 Sep 2023 17:20:58 +0200 Subject: media: v4l2-device.h: drop V4L2_DEVICE_NAME_SIZE Don't use defines for the size of a name field, everyone should just use sizeof(). In this case it was never used, but it is bad practice, so just drop it. Signed-off-by: Hans Verkuil --- include/media/v4l2-device.h | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) (limited to 'include') diff --git a/include/media/v4l2-device.h b/include/media/v4l2-device.h index 8a8977a33ec1..f6f111fae33c 100644 --- a/include/media/v4l2-device.h +++ b/include/media/v4l2-device.h @@ -13,8 +13,6 @@ #include #include -#define V4L2_DEVICE_NAME_SIZE (20 + 16) - struct v4l2_ctrl_handler; /** @@ -49,7 +47,7 @@ struct v4l2_device { struct media_device *mdev; struct list_head subdevs; spinlock_t lock; - char name[V4L2_DEVICE_NAME_SIZE]; + char name[36]; void (*notify)(struct v4l2_subdev *sd, unsigned int notification, void *arg); struct v4l2_ctrl_handler *ctrl_handler; -- cgit From 54b6b605b9a00f5d93b48734122fa87ae345981e Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Fri, 22 Sep 2023 10:49:52 -0700 Subject: media: v4l2-event: Annotate struct v4l2_subscribed_event with __counted_by Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct v4l2_subscribed_event. Additionally, since the element count member must be set before accessing the annotated flexible array member, move its initialization earlier. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: lijian Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Signed-off-by: Hans Verkuil --- drivers/media/v4l2-core/v4l2-event.c | 2 +- include/media/v4l2-event.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'include') diff --git a/drivers/media/v4l2-core/v4l2-event.c b/drivers/media/v4l2-core/v4l2-event.c index c5ce9f11ad7b..3898ff7edddb 100644 --- a/drivers/media/v4l2-core/v4l2-event.c +++ b/drivers/media/v4l2-core/v4l2-event.c @@ -238,6 +238,7 @@ int v4l2_event_subscribe(struct v4l2_fh *fh, sev = kvzalloc(struct_size(sev, events, elems), GFP_KERNEL); if (!sev) return -ENOMEM; + sev->elems = elems; for (i = 0; i < elems; i++) sev->events[i].sev = sev; sev->type = sub->type; @@ -245,7 +246,6 @@ int v4l2_event_subscribe(struct v4l2_fh *fh, sev->flags = sub->flags; sev->fh = fh; sev->ops = ops; - sev->elems = elems; mutex_lock(&fh->subscribe_lock); diff --git a/include/media/v4l2-event.h b/include/media/v4l2-event.h index 4ffa914ade3a..3a0e2588361c 100644 --- a/include/media/v4l2-event.h +++ b/include/media/v4l2-event.h @@ -78,7 +78,7 @@ struct v4l2_subscribed_event { unsigned int elems; unsigned int first; unsigned int in_use; - struct v4l2_kevent events[]; + struct v4l2_kevent events[] __counted_by(elems); }; /** -- cgit From 2d21fef54800bd6641f85a6821427260439c9539 Mon Sep 17 00:00:00 2001 From: Sakari Ailus Date: Tue, 12 Sep 2023 11:36:51 +0300 Subject: media: Add MIPI CSI-2 generic long packet type definition Add a definition for MIPI CSI-2 generic long packet types. The generic long packet types are numbered from 1 to 4. Signed-off-by: Sakari Ailus Reviewed-by: Laurent Pinchart Signed-off-by: Hans Verkuil --- include/media/mipi-csi2.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include') diff --git a/include/media/mipi-csi2.h b/include/media/mipi-csi2.h index c3d8f12234b1..40fc0264250d 100644 --- a/include/media/mipi-csi2.h +++ b/include/media/mipi-csi2.h @@ -19,6 +19,7 @@ #define MIPI_CSI2_DT_NULL 0x10 #define MIPI_CSI2_DT_BLANKING 0x11 #define MIPI_CSI2_DT_EMBEDDED_8B 0x12 +#define MIPI_CSI2_DT_GENERIC_LONG(n) (0x13 + (n) - 1) /* 1..4 */ #define MIPI_CSI2_DT_YUV420_8B 0x18 #define MIPI_CSI2_DT_YUV420_10B 0x19 #define MIPI_CSI2_DT_YUV420_8B_LEGACY 0x1a -- cgit