[PATCH net-next 5/7] net: ipa: introduce ipa_cmd_init()

Alex Elder
2022-10-21T19:14:14Z

Currently, ipa_cmd_data_valid() is called by ipa_mem_config().
Nothing it does requires access to hardware though, so it can be
done during the init phase of IPA driver startup.

Create a new function ipa_cmd_init(), whose purpose is to do early
initialization related to IPA immediate commands. It will call the
build-time validation function, then will make the two calls made
previously by ipa_cmd_data_valid(). This make ipa_cmd_data_valid()
unnecessary, so get rid of it.

Rename ipa_cmd_header_valid() to be ipa_cmd_header_init_local_valid(),
so its name is clearer about which IPA immediate command it is
associated with.

Signed-off-by: Alex Elder <elder@linaro.org>
---
drivers/net/ipa/ipa_cmd.c | 31 +++++++++++++++----------------
drivers/net/ipa/ipa_cmd.h | 10 ++++++++++
drivers/net/ipa/ipa_mem.c | 4 ----
3 files changed, 25 insertions(+), 20 deletions(-)

diff --git a/drivers/net/ipa/ipa_cmd.c b/drivers/net/ipa/ipa_cmd.c
index abee6cc018a27..de2cd86aa9e28 100644
--- a/drivers/net/ipa/ipa_cmd.c
+++ b/drivers/net/ipa/ipa_cmd.c
@@ -202,7 +202,7 @@ bool ipa_cmd_table_init_valid(struct ipa *ipa, const struct ipa_mem *mem,
}

/* Validate the memory region that holds headers */
-static bool ipa_cmd_header_valid(struct ipa *ipa)
+static bool ipa_cmd_header_init_local_valid(struct ipa *ipa)
{
struct device *dev = &ipa->pdev->dev;
const struct ipa_mem *mem;
@@ -318,26 +318,11 @@ static bool ipa_cmd_register_write_valid(struct ipa *ipa)
return true;
}

-bool ipa_cmd_data_valid(struct ipa *ipa)
-{
- if (!ipa_cmd_header_valid(ipa))
- return false;
-
- if (!ipa_cmd_register_write_valid(ipa))
- return false;
-
- return true;
-}
-
-
int ipa_cmd_pool_init(struct gsi_channel *channel, u32 tre_max)
{
struct gsi_trans_info *trans_info = &channel->trans_info;
struct device *dev = channel->gsi->dev;

- /* This is as good a place as any to validate build constants */
- ipa_cmd_validate_build();
-
/* Command payloads are allocated one at a time, but a single
* transaction can require up to the maximum supported by the
* channel; treat them as if they were allocated all at once.
@@ -637,3 +622,17 @@ struct gsi_trans *ipa_cmd_trans_alloc(struct ipa *ipa, u32 tre_count)
return gsi_channel_trans_alloc(&ipa->gsi, endpoint->channel_id,
tre_count, DMA_NONE);
}
+
+/* Init function for immediate commands; there is no ipa_cmd_exit() */
+int ipa_cmd_init(struct ipa *ipa)
+{
+ ipa_cmd_validate_build();
+
+ if (!ipa_cmd_header_init_local_valid(ipa))
+ return -EINVAL;
+
+ if (!ipa_cmd_register_write_valid(ipa))
+ return -EINVAL;
+
+ return 0;
+}
diff --git a/drivers/net/ipa/ipa_cmd.h b/drivers/net/ipa/ipa_cmd.h
index d03cc619e2c31..e2cf1c2b0ef24 100644
--- a/drivers/net/ipa/ipa_cmd.h
+++ b/drivers/net/ipa/ipa_cmd.h
@@ -162,4 +162,14 @@ void ipa_cmd_pipeline_clear_wait(struct ipa *ipa);
*/
struct gsi_trans *ipa_cmd_trans_alloc(struct ipa *ipa, u32 tre_count);

+/**
+ * ipa_cmd_init() - Initialize IPA immediate commands
+ * @ipa: - IPA pointer
+ *
+ * Return: 0 if successful, or a negative error code
+ *
+ * There is no need for a matching ipa_cmd_exit() function.
+ */
+int ipa_cmd_init(struct ipa *ipa);
+
#endif /* _IPA_CMD_H_ */
diff --git a/drivers/net/ipa/ipa_mem.c b/drivers/net/ipa/ipa_mem.c
index f84c6830495a4..2238dac2af07e 100644
--- a/drivers/net/ipa/ipa_mem.c
+++ b/drivers/net/ipa/ipa_mem.c
@@ -370,10 +370,6 @@ int ipa_mem_config(struct ipa *ipa)
if (!ipa_table_valid(ipa))
goto err_dma_free;

- /* Validate memory-related properties relevant to immediate commands */
- if (!ipa_cmd_data_valid(ipa))
- goto err_dma_free;
-
/* Verify the microcontroller ring alignment (if defined) */
mem = ipa_mem_find(ipa, IPA_MEM_UC_EVENT_RING);
if (mem && mem->offset % 1024) {
--
2.34.1