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firmware: Add support for querying msmc memory

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DMSC can use certain amount of msmc memory available in the
system. Also certain part of msmc memory can be marked as L3
cache using board config. But users might not know what size
is being used and the remaining available msmc memory. In order
to fix this TISCI protocol provides a messages that can query
the available msmc memory in the system. Add support for this
message.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
This commit is contained in:
Lokesh Vutla 2019-03-08 11:47:32 +05:30 committed by Tom Rini
parent 097fd51b7a
commit 826eb74015
3 changed files with 76 additions and 0 deletions
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53
drivers/firmware/ti_sci.c
View file

@ -1604,6 +1604,58 @@ int ti_sci_cmd_get_resource_range_from_shost(const struct ti_sci_handle *handle,
range_start, range_num);
}
/**
* ti_sci_cmd_query_msmc() - Command to query currently available msmc memory
* @handle: pointer to TI SCI handle
* @msms_start: MSMC start as returned by tisci
* @msmc_end: MSMC end as returned by tisci
*
* Return: 0 if all went well, else returns appropriate error value.
*/
static int ti_sci_cmd_query_msmc(const struct ti_sci_handle *handle,
u64 *msmc_start, u64 *msmc_end)
{
struct ti_sci_msg_resp_query_msmc *resp;
struct ti_sci_msg_hdr req;
struct ti_sci_info *info;
struct ti_sci_xfer *xfer;
int ret = 0;
if (IS_ERR(handle))
return PTR_ERR(handle);
if (!handle)
return -EINVAL;
info = handle_to_ti_sci_info(handle);
xfer = ti_sci_setup_one_xfer(info, TISCI_MSG_QUERY_MSMC,
TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
(u32 *)&req, sizeof(req), sizeof(*resp));
if (IS_ERR(xfer)) {
ret = PTR_ERR(xfer);
dev_err(info->dev, "Message alloc failed(%d)\n", ret);
return ret;
}
ret = ti_sci_do_xfer(info, xfer);
if (ret) {
dev_err(dev, "Mbox send fail %d\n", ret);
return ret;
}
resp = (struct ti_sci_msg_resp_query_msmc *)xfer->tx_message.buf;
if (!ti_sci_is_response_ack(resp))
return -ENODEV;
*msmc_start = ((u64)resp->msmc_start_high << TISCI_ADDR_HIGH_SHIFT) |
resp->msmc_start_low;
*msmc_end = ((u64)resp->msmc_end_high << TISCI_ADDR_HIGH_SHIFT) |
resp->msmc_end_low;
return ret;
}
/**
* ti_sci_cmd_proc_request() - Command to request a physical processor control
* @handle: Pointer to TI SCI handle
@ -2426,6 +2478,7 @@ static void ti_sci_setup_ops(struct ti_sci_info *info)
cops->get_freq = ti_sci_cmd_clk_get_freq;
core_ops->reboot_device = ti_sci_cmd_core_reboot;
core_ops->query_msmc = ti_sci_cmd_query_msmc;
rm_core_ops->get_range = ti_sci_cmd_get_resource_range;
rm_core_ops->get_range_from_shost =

19
drivers/firmware/ti_sci.h
View file

@ -25,6 +25,7 @@
#define TI_SCI_MSG_BOARD_CONFIG_RM 0x000c
#define TI_SCI_MSG_BOARD_CONFIG_SECURITY 0x000d
#define TI_SCI_MSG_BOARD_CONFIG_PM 0x000e
#define TISCI_MSG_QUERY_MSMC 0x0020
/* Device requests */
#define TI_SCI_MSG_SET_DEVICE_STATE 0x0200
@ -161,6 +162,24 @@ struct ti_sci_msg_board_config {
u16 boardcfg_size;
} __packed;
/**
* struct ti_sci_msg_resp_query_msmc - Query msmc message response structure
* @hdr: Generic Header
* @msmc_start_low: Lower 32 bit of msmc start
* @msmc_start_high: Upper 32 bit of msmc start
* @msmc_end_low: Lower 32 bit of msmc end
* @msmc_end_high: Upper 32 bit of msmc end
*
* Response to a generic message with message type TISCI_MSG_QUERY_MSMC
*/
struct ti_sci_msg_resp_query_msmc {
struct ti_sci_msg_hdr hdr;
u32 msmc_start_low;
u32 msmc_start_high;
u32 msmc_end_low;
u32 msmc_end_high;
} __packed;
/**
* struct ti_sci_msg_req_set_device_state - Set the desired state of the device
* @hdr: Generic header

4
include/linux/soc/ti/ti_sci_protocol.h
View file

@ -242,9 +242,13 @@ struct ti_sci_rm_core_ops {
* @reboot_device: Reboot the SoC
* Returns 0 for successful request(ideally should never return),
* else returns corresponding error value.
* @query_msmc: Query the size of available msmc
* Return 0 for successful query else appropriate error value.
*/
struct ti_sci_core_ops {
int (*reboot_device)(const struct ti_sci_handle *handle);
int (*query_msmc)(const struct ti_sci_handle *handle,
u64 *msmc_start, u64 *msmc_end);
};
/**