habanalabs: add DRAM default page size to HW info

When using the device memory allocation API the user ought to know what
is the default allocation page size.
Signed-off-by: Ohad Sharabi <osharabi@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/habanalabs/common/habanalabs_ioctl.c

@@ -76,6 +76,7 @@ static int hw_ip_info(struct hl_device *hdev, struct hl_info_args *args)
 	if (hw_ip.dram_size > PAGE_SIZE)
 		hw_ip.dram_enabled = 1;
 	hw_ip.dram_page_size = prop->dram_page_size;
+	hw_ip.device_mem_alloc_default_page_size = prop->device_mem_alloc_default_page_size;
 	hw_ip.num_of_events = prop->num_of_events;
 
 	memcpy(hw_ip.cpucp_version, prop->cpucp_info.cpucp_version,

include/uapi/misc/habanalabs.h

@@ -409,6 +409,7 @@ enum hl_server_type {
  * @dram_page_size: The DRAM physical page size.
  * @number_of_user_interrupts: The number of interrupts that are available to the userspace
  *                             application to use. Relevant for Gaudi2 and later.
+ * @device_mem_alloc_default_page_size: default page size used in device memory allocation.
  */
 struct hl_info_hw_ip_info {
 	__u64 sram_base_address;
@@ -436,6 +437,8 @@ struct hl_info_hw_ip_info {
 	__u32 reserved3;
 	__u16 number_of_user_interrupts;
 	__u16 pad2;
+	__u64 reserved4;
+	__u64 device_mem_alloc_default_page_size;
 };
 
 struct hl_info_dram_usage {