[U-Boot] [PATCH v2 4/4] x86: tangier: Populate CSRT for shared DMA controller

Andy Shevchenko
2019-07-14T16:23:59Z

Intel Tangier has a shared DMA controller that, according to Microsoft spec,
has to be presented in CSRT table.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
arch/x86/cpu/tangier/acpi.c | 38 +++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)

diff --git a/arch/x86/cpu/tangier/acpi.c b/arch/x86/cpu/tangier/acpi.c
index 0e4f961c53..61b2642aa9 100644
--- a/arch/x86/cpu/tangier/acpi.c
+++ b/arch/x86/cpu/tangier/acpi.c
@@ -68,6 +68,44 @@ u32 acpi_fill_mcfg(u32 current)
return current;
}

+static u32 acpi_fill_csrt_dma(struct acpi_csrt_group *grp)
+{
+ struct acpi_csrt_shared_info *si = (struct acpi_csrt_shared_info *)&grp[1];
+
+ /* Fill the Resource Group with Shared Information attached */
+ memset(grp, 0, sizeof(*grp));
+ grp->shared_info_length = sizeof(struct acpi_csrt_shared_info);
+ grp->length = sizeof(struct acpi_csrt_group) + grp->shared_info_length;
+ /* TODO: All values below should come from U-Boot DT somehow */
+ sprintf((char *)&grp->vendor_id, "%04X", 0x8086);
+ grp->device_id = 0x11a2;
+
+ /* Fill the Resource Group Shared Information */
+ memset(si, 0, sizeof(*si));
+ si->major_version = 1;
+ si->minor_version = 0;
+ /* TODO: All values below should come from U-Boot DT somehow */
+ si->mmio_base_low = 0xff192000;
+ si->mmio_base_high = 0;
+ si->gsi_interrupt = 32;
+ si->interrupt_polarity = 1;
+ si->interrupt_mode = 0;
+ si->num_channels = 8;
+ si->dma_address_width = 32;
+ si->base_request_line = 0;
+ si->num_handshake_signals = 16;
+ si->max_block_size = 0x20000;
+
+ return grp->length;
+}
+
+u32 acpi_fill_csrt(u32 current)
+{
+ current += acpi_fill_csrt_dma((struct acpi_csrt_group *)current);
+
+ return current;
+}
+
void acpi_create_gnvs(struct acpi_global_nvs *gnvs)
{
struct udevice *dev;
--
2.20.1