device/xhci: Add functions to work with resource pointers

The XHCI device functions currently use functions that require a
access to the device tree. Create variant of these functions that can
operate with a resource* as an argument and refactor the existing
device*-based functions to operate by calling the resource*-based
variants. This is useful for stages like SMM that may not have access to
the device tree.

BRANCH=guybrush
BUG=b:186792595
TEST=Ran on skyrim device, verified that XHCI ACPI tables are still
generated correctly.

Change-Id: If5a74f9529d5dc6031ec968ef5f40a9cad5ffbc4
Signed-off-by: Robert Zieba <robertzieba@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/69914
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
This commit is contained in:
Robert Zieba
2022-11-18 18:06:28 +00:00
committed by Martin L Roth
parent ac8c378777
commit 219cb952f8
4 changed files with 140 additions and 95 deletions

View File

@@ -61,7 +61,8 @@ ramstage-y += mmio.c
ramstage-y += resource_allocator_common.c
ramstage-y += resource_allocator_v4.c
ramstage-$(CONFIG_XHCI_UTILS) += xhci.c
ramstage-$(CONFIG_XHCI_UTILS) += xhci.c xhci_resource.c
smm-$(CONFIG_XHCI_UTILS) += xhci_resource.c
ramstage-y += gpio.c
ramstage-y += mdio.c

View File

@@ -2,31 +2,18 @@
#include <console/console.h>
#include <device/mmio.h>
#include <device/device.h>
#include <device/pci_def.h>
#include <device/xhci.h>
#include <string.h>
union xhci_ext_caps_header {
uint32_t val;
struct {
uint32_t cap_id : 8;
uint32_t next_ptr : 8;
uint32_t reserved : 16;
};
};
enum cb_err xhci_for_each_ext_cap(const struct device *device, void *context,
void (*callback)(void *context,
const struct xhci_ext_cap *cap))
{
struct resource *res;
uint32_t *ext_cap_ptr;
uint32_t ext_caps_word_offset;
union xhci_ext_caps_header header;
struct xhci_ext_cap cap;
const struct resource *res;
if (!device || !callback)
return CB_ERR_ARG;
if (!device)
return CB_ERR;
res = probe_resource(device, PCI_BASE_ADDRESS_0);
if (!res) {
@@ -35,89 +22,24 @@ enum cb_err xhci_for_each_ext_cap(const struct device *device, void *context,
return CB_ERR;
}
if (!(res->flags & IORESOURCE_ASSIGNED)) {
printk(BIOS_ERR, "%s: BAR is not assigned\n", __func__);
return CB_ERR;
}
if (res->limit > 0xFFFFFFFF) {
printk(BIOS_ERR, "%s: 64-bit BAR is not supported\n", __func__);
return CB_ERR;
}
ext_caps_word_offset = read16(res2mmio(res, XHCI_HCCPARAMS1_XECP, 0));
if (!ext_caps_word_offset) {
printk(BIOS_ERR, "%s: No extended capabilities defined\n", __func__);
return CB_ERR;
}
ext_cap_ptr = res2mmio(res, ext_caps_word_offset << 2, 0);
while ((uintptr_t)ext_cap_ptr < (uintptr_t)res->limit) {
header.val = read32(ext_cap_ptr);
cap.cap_id = header.cap_id;
if (header.cap_id == XHCI_ECP_CAP_ID_SUPP) {
cap.supported_protocol.reg0 = header.val;
cap.supported_protocol.reg1 = read32(ext_cap_ptr + 1);
cap.supported_protocol.reg2 = read32(ext_cap_ptr + 2);
}
callback(context, &cap);
if (!header.next_ptr)
break;
ext_cap_ptr += header.next_ptr;
}
return CB_SUCCESS;
}
struct supported_usb_cap_context {
void *context;
void (*callback)(void *context, const struct xhci_supported_protocol *data);
};
static void xhci_supported_usb_cap_handler(void *context, const struct xhci_ext_cap *cap)
{
const struct xhci_supported_protocol *data;
struct supported_usb_cap_context *internal_context = context;
if (cap->cap_id != XHCI_ECP_CAP_ID_SUPP)
return;
data = &cap->supported_protocol;
if (memcmp(data->name, "USB ", 4)) {
printk(BIOS_DEBUG, "%s: Unknown Protocol: %.*s\n", __func__,
(int)sizeof(data->name), data->name);
return;
}
internal_context->callback(internal_context->context, data);
return xhci_resource_for_each_ext_cap(res, context, callback);
}
enum cb_err xhci_for_each_supported_usb_cap(
const struct device *device, void *context,
void (*callback)(void *context, const struct xhci_supported_protocol *data))
{
struct supported_usb_cap_context internal_context = {
.context = context,
.callback = callback,
};
const struct resource *res;
return xhci_for_each_ext_cap(device, &internal_context, xhci_supported_usb_cap_handler);
}
if (!device)
return CB_ERR;
void xhci_print_supported_protocol(const struct xhci_supported_protocol *supported_protocol)
{
printk(BIOS_DEBUG, "xHCI Supported Protocol:\n");
printk(BIOS_DEBUG, " Major: %#x, Minor: %#x, Protocol: '%.*s'\n",
supported_protocol->major_rev, supported_protocol->minor_rev,
(int)sizeof(supported_protocol->name), supported_protocol->name);
printk(BIOS_DEBUG, " Port Offset: %d, Port Count: %d\n",
supported_protocol->port_offset, supported_protocol->port_count);
res = probe_resource(device, PCI_BASE_ADDRESS_0);
if (!res) {
printk(BIOS_ERR, "%s: Unable to find BAR resource for %s\n", __func__,
dev_path(device));
return CB_ERR;
}
return xhci_resource_for_each_supported_usb_cap(res, context, callback);
}

116
src/device/xhci_resource.c Normal file
View File

@@ -0,0 +1,116 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
#include <arch/mmio.h>
#include <console/console.h>
#include <device/pci_def.h>
#include <device/xhci.h>
#include <string.h>
union xhci_ext_caps_header {
uint32_t val;
struct {
uint32_t cap_id : 8;
uint32_t next_ptr : 8;
uint32_t reserved : 16;
};
};
enum cb_err xhci_resource_for_each_ext_cap(const struct resource *res, void *context,
void (*callback)(void *context,
const struct xhci_ext_cap *cap))
{
uint32_t *ext_cap_ptr;
uint32_t ext_caps_word_offset;
union xhci_ext_caps_header header;
struct xhci_ext_cap cap;
if (!res || !callback)
return CB_ERR_ARG;
if (!(res->flags & IORESOURCE_ASSIGNED)) {
printk(BIOS_ERR, "%s: BAR is not assigned\n", __func__);
return CB_ERR;
}
if (res->limit > 0xFFFFFFFF) {
printk(BIOS_ERR, "%s: 64-bit BAR is not supported\n", __func__);
return CB_ERR;
}
ext_caps_word_offset = read16(res2mmio(res, XHCI_HCCPARAMS1_XECP, 0));
if (!ext_caps_word_offset) {
printk(BIOS_ERR, "%s: No extended capabilities defined\n", __func__);
return CB_ERR;
}
ext_cap_ptr = res2mmio(res, ext_caps_word_offset << 2, 0);
while ((uintptr_t)ext_cap_ptr < (uintptr_t)res->limit) {
header.val = read32(ext_cap_ptr);
cap.cap_id = header.cap_id;
if (header.cap_id == XHCI_ECP_CAP_ID_SUPP) {
cap.supported_protocol.reg0 = header.val;
cap.supported_protocol.reg1 = read32(ext_cap_ptr + 1);
cap.supported_protocol.reg2 = read32(ext_cap_ptr + 2);
}
callback(context, &cap);
if (!header.next_ptr)
break;
ext_cap_ptr += header.next_ptr;
}
return CB_SUCCESS;
}
struct supported_usb_cap_context {
void *context;
void (*callback)(void *context, const struct xhci_supported_protocol *data);
};
static void xhci_supported_usb_cap_handler(void *context, const struct xhci_ext_cap *cap)
{
const struct xhci_supported_protocol *data;
struct supported_usb_cap_context *internal_context = context;
if (cap->cap_id != XHCI_ECP_CAP_ID_SUPP)
return;
data = &cap->supported_protocol;
if (memcmp(data->name, "USB ", 4)) {
printk(BIOS_DEBUG, "%s: Unknown Protocol: %.*s\n", __func__,
(int)sizeof(data->name), data->name);
return;
}
internal_context->callback(internal_context->context, data);
}
enum cb_err xhci_resource_for_each_supported_usb_cap(
const struct resource *res, void *context,
void (*callback)(void *context, const struct xhci_supported_protocol *data))
{
struct supported_usb_cap_context internal_context = {
.context = context,
.callback = callback,
};
return xhci_resource_for_each_ext_cap(res, &internal_context,
xhci_supported_usb_cap_handler);
}
void xhci_print_supported_protocol(const struct xhci_supported_protocol *supported_protocol)
{
printk(BIOS_DEBUG, "xHCI Supported Protocol:\n");
printk(BIOS_DEBUG, " Major: %#x, Minor: %#x, Protocol: '%.*s'\n",
supported_protocol->major_rev, supported_protocol->minor_rev,
(int)sizeof(supported_protocol->name), supported_protocol->name);
printk(BIOS_DEBUG, " Port Offset: %d, Port Count: %d\n",
supported_protocol->port_offset, supported_protocol->port_count);
}

View File

@@ -97,6 +97,9 @@ struct xhci_usb_info {
/**
* Iterates over the xHCI Extended Capabilities List.
*/
enum cb_err xhci_resource_for_each_ext_cap(const struct resource *res, void *context,
void (*callback)(void *context,
const struct xhci_ext_cap *cap));
enum cb_err xhci_for_each_ext_cap(const struct device *device, void *context,
void (*callback)(void *context,
const struct xhci_ext_cap *cap));
@@ -108,6 +111,9 @@ enum cb_err xhci_for_each_ext_cap(const struct device *device, void *context,
enum cb_err xhci_for_each_supported_usb_cap(
const struct device *device, void *context,
void (*callback)(void *context, const struct xhci_supported_protocol *data));
enum cb_err xhci_resource_for_each_supported_usb_cap(
const struct resource *res, void *context,
void (*callback)(void *context, const struct xhci_supported_protocol *data));
void xhci_print_supported_protocol(const struct xhci_supported_protocol *supported_protocol);