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net: ipa: update some comments in "ipa_data.h"

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Fix/expand some comments in "ipa_data.h".

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alex Elder 2021-03-20 10:57:07 -05:00 committed by David S. Miller
parent 1690d8a75d
commit b259cc2a03
1 changed files with 12 additions and 11 deletions
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23
drivers/net/ipa/ipa_data.h
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@ -18,8 +18,9 @@
* Boot-time configuration data is used to define the configuration of the
* IPA and GSI resources to use for a given platform. This data is supplied
* via the Device Tree match table, associated with a particular compatible
* string. The data defines information about resources, endpoints, and
* channels.
* string. The data defines information about how resources, endpoints and
* channels, memory, clocking and so on are allocated and used for the
* platform.
*
* Resources are data structures used internally by the IPA hardware. The
* configuration data defines the number (or limits of the number) of various
@ -75,10 +76,10 @@ struct ipa_qsb_data {
*
* A GSI channel is a unidirectional means of transferring data to or
* from (and through) the IPA. A GSI channel has a ring buffer made
* up of "transfer elements" (TREs) that specify individual data transfers
* or IPA immediate commands. TREs are filled by the AP, and control
* is passed to IPA hardware by writing the last written element
* into a doorbell register.
* up of "transfer ring elements" (TREs) that specify individual data
* transfers or IPA immediate commands. TREs are filled by the AP,
* and control is passed to IPA hardware by writing the last written
* element into a doorbell register.
*
* When data transfer commands have completed the GSI generates an
* event (a structure of data) and optionally signals the AP with
@ -264,7 +265,7 @@ struct ipa_resource_data {
* @imem_addr: physical address of IPA region within IMEM
* @imem_size: size in bytes of IPA IMEM region
* @smem_id: item identifier for IPA region within SMEM memory
* @imem_size: size in bytes of the IPA SMEM region
* @smem_size: size in bytes of the IPA SMEM region
*/
struct ipa_mem_data {
u32 local_count;
@ -307,14 +308,14 @@ struct ipa_clock_data {
* @endpoint_count: number of entries in the endpoint_data array
* @endpoint_data: IPA endpoint/GSI channel data
* @resource_data: IPA resource configuration data
* @mem_count: number of entries in the mem_data array
* @mem_data: IPA-local shared memory region data
* @mem_data: IPA memory region data
* @clock_data: IPA clock and interconnect data
*/
struct ipa_data {
enum ipa_version version;
u32 qsb_count; /* # entries in qsb_data[] */
u32 qsb_count; /* number of entries in qsb_data[] */
const struct ipa_qsb_data *qsb_data;
u32 endpoint_count; /* # entries in endpoint_data[] */
u32 endpoint_count; /* number of entries in endpoint_data[] */
const struct ipa_gsi_endpoint_data *endpoint_data;
const struct ipa_resource_data *resource_data;
const struct ipa_mem_data *mem_data;