[Intel-gfx] [PATCH v3 01/15] HAX: mei: GSC support for XeHP SDV and DG2 platform
Daniele Ceraolo Spurio
daniele.ceraolospurio at intel.com
Fri Aug 19 22:53:21 UTC 2022
This is a squash of the GSC support for XeHP SDV and DG2 series, which
is being reviewed separately at:
https://patchwork.freedesktop.org/series/106638/
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
---
drivers/gpu/drm/i915/gt/intel_gsc.c | 118 +++++++++++++++++++++++++---
drivers/gpu/drm/i915/gt/intel_gsc.h | 3 +
drivers/misc/mei/bus-fixup.c | 104 ++++++++++++++++--------
drivers/misc/mei/client.c | 14 ++--
drivers/misc/mei/debugfs.c | 17 ++++
drivers/misc/mei/gsc-me.c | 77 +++++++++++++++---
drivers/misc/mei/hbm.c | 12 +--
drivers/misc/mei/hw-me-regs.h | 7 ++
drivers/misc/mei/hw-me.c | 116 ++++++++++++++++++++++-----
drivers/misc/mei/hw-me.h | 14 +++-
drivers/misc/mei/hw-txe.c | 2 +-
drivers/misc/mei/hw.h | 5 ++
drivers/misc/mei/init.c | 21 ++++-
drivers/misc/mei/main.c | 2 +-
drivers/misc/mei/mei_dev.h | 26 ++++++
drivers/misc/mei/mkhi.h | 57 ++++++++++++++
drivers/misc/mei/pci-me.c | 2 +-
include/linux/mei_aux.h | 12 +++
18 files changed, 518 insertions(+), 91 deletions(-)
create mode 100644 drivers/misc/mei/mkhi.h
diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.c b/drivers/gpu/drm/i915/gt/intel_gsc.c
index 0e494028b81d..162bea57fbb5 100644
--- a/drivers/gpu/drm/i915/gt/intel_gsc.c
+++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
@@ -7,6 +7,7 @@
#include <linux/mei_aux.h>
#include "i915_drv.h"
#include "i915_reg.h"
+#include "gem/i915_gem_region.h"
#include "gt/intel_gsc.h"
#include "gt/intel_gt.h"
@@ -36,10 +37,68 @@ static int gsc_irq_init(int irq)
return irq_set_chip_data(irq, NULL);
}
+static int
+gsc_ext_om_alloc(struct intel_gsc *gsc, struct intel_gsc_intf *intf, size_t size)
+{
+ struct intel_gt *gt = gsc_to_gt(gsc);
+ struct drm_i915_gem_object *obj;
+ void *vaddr;
+ int err;
+
+ obj = i915_gem_object_create_lmem(gt->i915, size, I915_BO_ALLOC_CONTIGUOUS);
+ if (IS_ERR(obj)) {
+ drm_err(>->i915->drm, "Failed to allocate gsc memory\n");
+ return PTR_ERR(obj);
+ }
+
+ err = i915_gem_object_pin_pages_unlocked(obj);
+ if (err) {
+ drm_err(>->i915->drm, "Failed to pin pages for gsc memory\n");
+ goto out_put;
+ }
+
+ vaddr = i915_gem_object_pin_map_unlocked(obj, i915_coherent_map_type(gt->i915, obj, true));
+ if (IS_ERR(vaddr)) {
+ err = PTR_ERR(vaddr);
+ drm_err(>->i915->drm, "Failed to map gsc memory\n");
+ goto out_unpin;
+ }
+
+ memset(vaddr, 0, obj->base.size);
+
+ i915_gem_object_unpin_map(obj);
+
+ intf->gem_obj = obj;
+
+ return 0;
+
+out_unpin:
+ i915_gem_object_unpin_pages(obj);
+out_put:
+ i915_gem_object_put(obj);
+ return err;
+}
+
+static void gsc_ext_om_destroy(struct intel_gsc_intf *intf)
+{
+ struct drm_i915_gem_object *obj = fetch_and_zero(&intf->gem_obj);
+
+ if (!obj)
+ return;
+
+ if (i915_gem_object_has_pinned_pages(obj))
+ i915_gem_object_unpin_pages(obj);
+
+ i915_gem_object_put(obj);
+}
+
struct gsc_def {
const char *name;
unsigned long bar;
size_t bar_size;
+ bool use_polling;
+ bool slow_firmware;
+ size_t lmem_size;
};
/* gsc resources and definitions (HECI1 and HECI2) */
@@ -54,11 +113,25 @@ static const struct gsc_def gsc_def_dg1[] = {
}
};
+static const struct gsc_def gsc_def_xehpsdv[] = {
+ {
+ /* HECI1 not enabled on the device. */
+ },
+ {
+ .name = "mei-gscfi",
+ .bar = DG1_GSC_HECI2_BASE,
+ .bar_size = GSC_BAR_LENGTH,
+ .use_polling = true,
+ .slow_firmware = true,
+ }
+};
+
static const struct gsc_def gsc_def_dg2[] = {
{
.name = "mei-gsc",
.bar = DG2_GSC_HECI1_BASE,
.bar_size = GSC_BAR_LENGTH,
+ .lmem_size = SZ_4M,
},
{
.name = "mei-gscfi",
@@ -75,26 +148,32 @@ static void gsc_release_dev(struct device *dev)
kfree(adev);
}
-static void gsc_destroy_one(struct intel_gsc_intf *intf)
+static void gsc_destroy_one(struct drm_i915_private *i915,
+ struct intel_gsc *gsc, unsigned int intf_id)
{
+ struct intel_gsc_intf *intf = &gsc->intf[intf_id];
+
if (intf->adev) {
auxiliary_device_delete(&intf->adev->aux_dev);
auxiliary_device_uninit(&intf->adev->aux_dev);
intf->adev = NULL;
}
+
if (intf->irq >= 0)
irq_free_desc(intf->irq);
intf->irq = -1;
+
+ gsc_ext_om_destroy(intf);
}
-static void gsc_init_one(struct drm_i915_private *i915,
- struct intel_gsc_intf *intf,
+static void gsc_init_one(struct drm_i915_private *i915, struct intel_gsc *gsc,
unsigned int intf_id)
{
struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
struct mei_aux_device *adev;
struct auxiliary_device *aux_dev;
const struct gsc_def *def;
+ struct intel_gsc_intf *intf = &gsc->intf[intf_id];
int ret;
intf->irq = -1;
@@ -105,6 +184,8 @@ static void gsc_init_one(struct drm_i915_private *i915,
if (IS_DG1(i915)) {
def = &gsc_def_dg1[intf_id];
+ } else if (IS_XEHPSDV(i915)) {
+ def = &gsc_def_xehpsdv[intf_id];
} else if (IS_DG2(i915)) {
def = &gsc_def_dg2[intf_id];
} else {
@@ -117,10 +198,14 @@ static void gsc_init_one(struct drm_i915_private *i915,
return;
}
+ /* skip irq initialization */
+ if (def->use_polling)
+ goto add_device;
+
intf->irq = irq_alloc_desc(0);
if (intf->irq < 0) {
drm_err(&i915->drm, "gsc irq error %d\n", intf->irq);
- return;
+ goto fail;
}
ret = gsc_irq_init(intf->irq);
@@ -129,16 +214,31 @@ static void gsc_init_one(struct drm_i915_private *i915,
goto fail;
}
+add_device:
adev = kzalloc(sizeof(*adev), GFP_KERNEL);
if (!adev)
goto fail;
+ if (def->lmem_size) {
+ drm_dbg(&i915->drm, "setting up GSC lmem\n");
+
+ if (gsc_ext_om_alloc(gsc, intf, def->lmem_size)) {
+ drm_err(&i915->drm, "setting up gsc extended operational memory failed\n");
+ kfree(adev);
+ goto fail;
+ }
+
+ adev->ext_op_mem.start = i915_gem_object_get_dma_address(intf->gem_obj, 0);
+ adev->ext_op_mem.end = adev->ext_op_mem.start + def->lmem_size;
+ }
+
adev->irq = intf->irq;
adev->bar.parent = &pdev->resource[0];
adev->bar.start = def->bar + pdev->resource[0].start;
adev->bar.end = adev->bar.start + def->bar_size - 1;
adev->bar.flags = IORESOURCE_MEM;
adev->bar.desc = IORES_DESC_NONE;
+ adev->slow_firmware = def->slow_firmware;
aux_dev = &adev->aux_dev;
aux_dev->name = def->name;
@@ -165,7 +265,7 @@ static void gsc_init_one(struct drm_i915_private *i915,
return;
fail:
- gsc_destroy_one(intf);
+ gsc_destroy_one(i915, gsc, intf->id);
}
static void gsc_irq_handler(struct intel_gt *gt, unsigned int intf_id)
@@ -182,10 +282,8 @@ static void gsc_irq_handler(struct intel_gt *gt, unsigned int intf_id)
return;
}
- if (gt->gsc.intf[intf_id].irq < 0) {
- drm_err_ratelimited(>->i915->drm, "GSC irq: irq not set");
+ if (gt->gsc.intf[intf_id].irq < 0)
return;
- }
ret = generic_handle_irq(gt->gsc.intf[intf_id].irq);
if (ret)
@@ -208,7 +306,7 @@ void intel_gsc_init(struct intel_gsc *gsc, struct drm_i915_private *i915)
return;
for (i = 0; i < INTEL_GSC_NUM_INTERFACES; i++)
- gsc_init_one(i915, &gsc->intf[i], i);
+ gsc_init_one(i915, gsc, i);
}
void intel_gsc_fini(struct intel_gsc *gsc)
@@ -220,5 +318,5 @@ void intel_gsc_fini(struct intel_gsc *gsc)
return;
for (i = 0; i < INTEL_GSC_NUM_INTERFACES; i++)
- gsc_destroy_one(&gsc->intf[i]);
+ gsc_destroy_one(gt->i915, gsc, i);
}
diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.h b/drivers/gpu/drm/i915/gt/intel_gsc.h
index 68582f912b21..fcac1775e9c3 100644
--- a/drivers/gpu/drm/i915/gt/intel_gsc.h
+++ b/drivers/gpu/drm/i915/gt/intel_gsc.h
@@ -20,11 +20,14 @@ struct mei_aux_device;
/**
* struct intel_gsc - graphics security controller
+ *
+ * @gem_obj: scratch memory GSC operations
* @intf : gsc interface
*/
struct intel_gsc {
struct intel_gsc_intf {
struct mei_aux_device *adev;
+ struct drm_i915_gem_object *gem_obj;
int irq;
unsigned int id;
} intf[INTEL_GSC_NUM_INTERFACES];
diff --git a/drivers/misc/mei/bus-fixup.c b/drivers/misc/mei/bus-fixup.c
index 59506ba6fc48..b350cc8d500c 100644
--- a/drivers/misc/mei/bus-fixup.c
+++ b/drivers/misc/mei/bus-fixup.c
@@ -15,6 +15,7 @@
#include "mei_dev.h"
#include "client.h"
+#include "mkhi.h"
#define MEI_UUID_NFC_INFO UUID_LE(0xd2de1625, 0x382d, 0x417d, \
0x48, 0xa4, 0xef, 0xab, 0xba, 0x8a, 0x12, 0x06)
@@ -89,20 +90,6 @@ struct mei_os_ver {
u8 reserved2;
} __packed;
-#define MKHI_FEATURE_PTT 0x10
-
-struct mkhi_rule_id {
- __le16 rule_type;
- u8 feature_id;
- u8 reserved;
-} __packed;
-
-struct mkhi_fwcaps {
- struct mkhi_rule_id id;
- u8 len;
- u8 data[];
-} __packed;
-
struct mkhi_fw_ver_block {
u16 minor;
u8 major;
@@ -115,22 +102,6 @@ struct mkhi_fw_ver {
struct mkhi_fw_ver_block ver[MEI_MAX_FW_VER_BLOCKS];
} __packed;
-#define MKHI_FWCAPS_GROUP_ID 0x3
-#define MKHI_FWCAPS_SET_OS_VER_APP_RULE_CMD 6
-#define MKHI_GEN_GROUP_ID 0xFF
-#define MKHI_GEN_GET_FW_VERSION_CMD 0x2
-struct mkhi_msg_hdr {
- u8 group_id;
- u8 command;
- u8 reserved;
- u8 result;
-} __packed;
-
-struct mkhi_msg {
- struct mkhi_msg_hdr hdr;
- u8 data[];
-} __packed;
-
#define MKHI_OSVER_BUF_LEN (sizeof(struct mkhi_msg_hdr) + \
sizeof(struct mkhi_fwcaps) + \
sizeof(struct mei_os_ver))
@@ -164,7 +135,6 @@ static int mei_osver(struct mei_cl_device *cldev)
sizeof(struct mkhi_fw_ver))
#define MKHI_FWVER_LEN(__num) (sizeof(struct mkhi_msg_hdr) + \
sizeof(struct mkhi_fw_ver_block) * (__num))
-#define MKHI_RCV_TIMEOUT 500 /* receive timeout in msec */
static int mei_fwver(struct mei_cl_device *cldev)
{
char buf[MKHI_FWVER_BUF_LEN];
@@ -187,7 +157,7 @@ static int mei_fwver(struct mei_cl_device *cldev)
ret = 0;
bytes_recv = __mei_cl_recv(cldev->cl, buf, sizeof(buf), NULL, 0,
- MKHI_RCV_TIMEOUT);
+ cldev->bus->timeouts.mkhi_recv);
if (bytes_recv < 0 || (size_t)bytes_recv < MKHI_FWVER_LEN(1)) {
/*
* Should be at least one version block,
@@ -218,6 +188,19 @@ static int mei_fwver(struct mei_cl_device *cldev)
return ret;
}
+static int mei_gfx_memory_ready(struct mei_cl_device *cldev)
+{
+ struct mkhi_gfx_mem_ready req = {0};
+ unsigned int mode = MEI_CL_IO_TX_INTERNAL;
+
+ req.hdr.group_id = MKHI_GROUP_ID_GFX;
+ req.hdr.command = MKHI_GFX_MEMORY_READY_CMD_REQ;
+ req.flags = MKHI_GFX_MEM_READY_PXP_ALLOWED;
+
+ dev_dbg(&cldev->dev, "Sending memory ready command\n");
+ return __mei_cl_send(cldev->cl, (u8 *)&req, sizeof(req), 0, mode);
+}
+
static void mei_mkhi_fix(struct mei_cl_device *cldev)
{
int ret;
@@ -264,6 +247,39 @@ static void mei_gsc_mkhi_ver(struct mei_cl_device *cldev)
dev_err(&cldev->dev, "FW version command failed %d\n", ret);
mei_cldev_disable(cldev);
}
+
+static void mei_gsc_mkhi_fix_ver(struct mei_cl_device *cldev)
+{
+ int ret;
+
+ /* No need to enable the client if nothing is needed from it */
+ if (!cldev->bus->fw_f_fw_ver_supported &&
+ cldev->bus->pxp_mode != MEI_DEV_PXP_INIT)
+ return;
+
+ ret = mei_cldev_enable(cldev);
+ if (ret)
+ return;
+
+ if (cldev->bus->pxp_mode == MEI_DEV_PXP_INIT) {
+ ret = mei_gfx_memory_ready(cldev);
+ if (ret < 0)
+ dev_err(&cldev->dev, "memory ready command failed %d\n", ret);
+ else
+ dev_dbg(&cldev->dev, "memory ready command sent\n");
+ /* we go to reset after that */
+ cldev->bus->pxp_mode = MEI_DEV_PXP_SETUP;
+ goto out;
+ }
+
+ ret = mei_fwver(cldev);
+ if (ret < 0)
+ dev_err(&cldev->dev, "FW version command failed %d\n",
+ ret);
+out:
+ mei_cldev_disable(cldev);
+}
+
/**
* mei_wd - wd client on the bus, change protocol version
* as the API has changed.
@@ -503,6 +519,26 @@ static void vt_support(struct mei_cl_device *cldev)
cldev->do_match = 1;
}
+/**
+ * pxp_is_ready - enable bus client if pxp is ready
+ *
+ * @cldev: me clients device
+ */
+static void pxp_is_ready(struct mei_cl_device *cldev)
+{
+ struct mei_device *bus = cldev->bus;
+
+ switch (bus->pxp_mode) {
+ case MEI_DEV_PXP_READY:
+ case MEI_DEV_PXP_DEFAULT:
+ cldev->do_match = 1;
+ break;
+ default:
+ cldev->do_match = 0;
+ break;
+ }
+}
+
#define MEI_FIXUP(_uuid, _hook) { _uuid, _hook }
static struct mei_fixup {
@@ -516,10 +552,10 @@ static struct mei_fixup {
MEI_FIXUP(MEI_UUID_WD, mei_wd),
MEI_FIXUP(MEI_UUID_MKHIF_FIX, mei_mkhi_fix),
MEI_FIXUP(MEI_UUID_IGSC_MKHI, mei_gsc_mkhi_ver),
- MEI_FIXUP(MEI_UUID_IGSC_MKHI_FIX, mei_gsc_mkhi_ver),
+ MEI_FIXUP(MEI_UUID_IGSC_MKHI_FIX, mei_gsc_mkhi_fix_ver),
MEI_FIXUP(MEI_UUID_HDCP, whitelist),
MEI_FIXUP(MEI_UUID_ANY, vt_support),
- MEI_FIXUP(MEI_UUID_PAVP, whitelist),
+ MEI_FIXUP(MEI_UUID_PAVP, pxp_is_ready),
};
/**
diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
index 31264ab2eb13..e7a16d9b2241 100644
--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -870,7 +870,7 @@ static int mei_cl_send_disconnect(struct mei_cl *cl, struct mei_cl_cb *cb)
}
list_move_tail(&cb->list, &dev->ctrl_rd_list);
- cl->timer_count = MEI_CONNECT_TIMEOUT;
+ cl->timer_count = dev->timeouts.connect;
mei_schedule_stall_timer(dev);
return 0;
@@ -945,7 +945,7 @@ static int __mei_cl_disconnect(struct mei_cl *cl)
wait_event_timeout(cl->wait,
cl->state == MEI_FILE_DISCONNECT_REPLY ||
cl->state == MEI_FILE_DISCONNECTED,
- mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
+ dev->timeouts.cl_connect);
mutex_lock(&dev->device_lock);
rets = cl->status;
@@ -1065,7 +1065,7 @@ static int mei_cl_send_connect(struct mei_cl *cl, struct mei_cl_cb *cb)
}
list_move_tail(&cb->list, &dev->ctrl_rd_list);
- cl->timer_count = MEI_CONNECT_TIMEOUT;
+ cl->timer_count = dev->timeouts.connect;
mei_schedule_stall_timer(dev);
return 0;
}
@@ -1164,7 +1164,7 @@ int mei_cl_connect(struct mei_cl *cl, struct mei_me_client *me_cl,
cl->state == MEI_FILE_DISCONNECTED ||
cl->state == MEI_FILE_DISCONNECT_REQUIRED ||
cl->state == MEI_FILE_DISCONNECT_REPLY),
- mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
+ dev->timeouts.cl_connect);
mutex_lock(&dev->device_lock);
if (!mei_cl_is_connected(cl)) {
@@ -1562,7 +1562,7 @@ int mei_cl_notify_request(struct mei_cl *cl,
cl->notify_en == request ||
cl->status ||
!mei_cl_is_connected(cl),
- mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
+ dev->timeouts.cl_connect);
mutex_lock(&dev->device_lock);
if (cl->notify_en != request && !cl->status)
@@ -2336,7 +2336,7 @@ int mei_cl_dma_alloc_and_map(struct mei_cl *cl, const struct file *fp,
mutex_unlock(&dev->device_lock);
wait_event_timeout(cl->wait,
cl->dma_mapped || cl->status,
- mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
+ dev->timeouts.cl_connect);
mutex_lock(&dev->device_lock);
if (!cl->dma_mapped && !cl->status)
@@ -2415,7 +2415,7 @@ int mei_cl_dma_unmap(struct mei_cl *cl, const struct file *fp)
mutex_unlock(&dev->device_lock);
wait_event_timeout(cl->wait,
!cl->dma_mapped || cl->status,
- mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
+ dev->timeouts.cl_connect);
mutex_lock(&dev->device_lock);
if (cl->dma_mapped && !cl->status)
diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c
index 1ce61e9e24fc..4074fec866a6 100644
--- a/drivers/misc/mei/debugfs.c
+++ b/drivers/misc/mei/debugfs.c
@@ -86,6 +86,20 @@ static int mei_dbgfs_active_show(struct seq_file *m, void *unused)
}
DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_active);
+static const char *mei_dev_pxp_mode_str(enum mei_dev_pxp_mode state)
+{
+#define MEI_PXP_MODE(state) case MEI_DEV_PXP_##state: return #state
+ switch (state) {
+ MEI_PXP_MODE(DEFAULT);
+ MEI_PXP_MODE(INIT);
+ MEI_PXP_MODE(SETUP);
+ MEI_PXP_MODE(READY);
+ default:
+ return "unknown";
+ }
+#undef MEI_PXP_MODE
+}
+
static int mei_dbgfs_devstate_show(struct seq_file *m, void *unused)
{
struct mei_device *dev = m->private;
@@ -112,6 +126,9 @@ static int mei_dbgfs_devstate_show(struct seq_file *m, void *unused)
seq_printf(m, "pg: %s, %s\n",
mei_pg_is_enabled(dev) ? "ENABLED" : "DISABLED",
mei_pg_state_str(mei_pg_state(dev)));
+
+ seq_printf(m, "pxp: %s\n", mei_dev_pxp_mode_str(dev->pxp_mode));
+
return 0;
}
DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_devstate);
diff --git a/drivers/misc/mei/gsc-me.c b/drivers/misc/mei/gsc-me.c
index c8145e9b62b6..75765e4df4ed 100644
--- a/drivers/misc/mei/gsc-me.c
+++ b/drivers/misc/mei/gsc-me.c
@@ -13,6 +13,7 @@
#include <linux/ktime.h>
#include <linux/delay.h>
#include <linux/pm_runtime.h>
+#include <linux/kthread.h>
#include "mei_dev.h"
#include "hw-me.h"
@@ -31,6 +32,17 @@ static int mei_gsc_read_hfs(const struct mei_device *dev, int where, u32 *val)
return 0;
}
+static void mei_gsc_set_ext_op_mem(const struct mei_me_hw *hw, struct resource *mem)
+{
+ u32 low = lower_32_bits(mem->start);
+ u32 hi = upper_32_bits(mem->start);
+ u32 limit = (resource_size(mem) / SZ_4K) | GSC_EXT_OP_MEM_VALID;
+
+ iowrite32(low, hw->mem_addr + H_GSC_EXT_OP_MEM_BASE_ADDR_LO_REG);
+ iowrite32(hi, hw->mem_addr + H_GSC_EXT_OP_MEM_BASE_ADDR_HI_REG);
+ iowrite32(limit, hw->mem_addr + H_GSC_EXT_OP_MEM_LIMIT_REG);
+}
+
static int mei_gsc_probe(struct auxiliary_device *aux_dev,
const struct auxiliary_device_id *aux_dev_id)
{
@@ -47,7 +59,7 @@ static int mei_gsc_probe(struct auxiliary_device *aux_dev,
device = &aux_dev->dev;
- dev = mei_me_dev_init(device, cfg);
+ dev = mei_me_dev_init(device, cfg, adev->slow_firmware);
if (!dev) {
ret = -ENOMEM;
goto err;
@@ -66,13 +78,33 @@ static int mei_gsc_probe(struct auxiliary_device *aux_dev,
dev_set_drvdata(device, dev);
- ret = devm_request_threaded_irq(device, hw->irq,
- mei_me_irq_quick_handler,
- mei_me_irq_thread_handler,
- IRQF_ONESHOT, KBUILD_MODNAME, dev);
- if (ret) {
- dev_err(device, "irq register failed %d\n", ret);
- goto err;
+ if (adev->ext_op_mem.start) {
+ mei_gsc_set_ext_op_mem(hw, &adev->ext_op_mem);
+ dev->pxp_mode = MEI_DEV_PXP_INIT;
+ }
+
+ /* use polling */
+ if (mei_me_hw_use_polling(hw)) {
+ mei_disable_interrupts(dev);
+ mei_clear_interrupts(dev);
+ init_waitqueue_head(&hw->wait_active);
+ hw->is_active = true; /* start in active mode for initialization */
+ hw->polling_thread = kthread_run(mei_me_polling_thread, dev,
+ "kmegscirqd/%s", dev_name(device));
+ if (IS_ERR(hw->polling_thread)) {
+ ret = PTR_ERR(hw->polling_thread);
+ dev_err(device, "unable to create kernel thread: %d\n", ret);
+ goto err;
+ }
+ } else {
+ ret = devm_request_threaded_irq(device, hw->irq,
+ mei_me_irq_quick_handler,
+ mei_me_irq_thread_handler,
+ IRQF_ONESHOT, KBUILD_MODNAME, dev);
+ if (ret) {
+ dev_err(device, "irq register failed %d\n", ret);
+ goto err;
+ }
}
pm_runtime_get_noresume(device);
@@ -98,7 +130,8 @@ static int mei_gsc_probe(struct auxiliary_device *aux_dev,
register_err:
mei_stop(dev);
- devm_free_irq(device, hw->irq, dev);
+ if (!mei_me_hw_use_polling(hw))
+ devm_free_irq(device, hw->irq, dev);
err:
dev_err(device, "probe failed: %d\n", ret);
@@ -119,12 +152,17 @@ static void mei_gsc_remove(struct auxiliary_device *aux_dev)
mei_stop(dev);
+ hw = to_me_hw(dev);
+ if (mei_me_hw_use_polling(hw))
+ kthread_stop(hw->polling_thread);
+
mei_deregister(dev);
pm_runtime_disable(&aux_dev->dev);
mei_disable_interrupts(dev);
- devm_free_irq(&aux_dev->dev, hw->irq, dev);
+ if (!mei_me_hw_use_polling(hw))
+ devm_free_irq(&aux_dev->dev, hw->irq, dev);
}
static int __maybe_unused mei_gsc_pm_suspend(struct device *device)
@@ -144,11 +182,22 @@ static int __maybe_unused mei_gsc_pm_suspend(struct device *device)
static int __maybe_unused mei_gsc_pm_resume(struct device *device)
{
struct mei_device *dev = dev_get_drvdata(device);
+ struct auxiliary_device *aux_dev;
+ struct mei_aux_device *adev;
int err;
+ struct mei_me_hw *hw;
if (!dev)
return -ENODEV;
+ hw = to_me_hw(dev);
+ aux_dev = to_auxiliary_dev(device);
+ adev = auxiliary_dev_to_mei_aux_dev(aux_dev);
+ if (adev->ext_op_mem.start) {
+ mei_gsc_set_ext_op_mem(hw, &adev->ext_op_mem);
+ dev->pxp_mode = MEI_DEV_PXP_INIT;
+ }
+
err = mei_restart(dev);
if (err)
return err;
@@ -185,6 +234,9 @@ static int __maybe_unused mei_gsc_pm_runtime_suspend(struct device *device)
if (mei_write_is_idle(dev)) {
hw = to_me_hw(dev);
hw->pg_state = MEI_PG_ON;
+
+ if (mei_me_hw_use_polling(hw))
+ hw->is_active = false;
ret = 0;
} else {
ret = -EAGAIN;
@@ -209,6 +261,11 @@ static int __maybe_unused mei_gsc_pm_runtime_resume(struct device *device)
hw = to_me_hw(dev);
hw->pg_state = MEI_PG_OFF;
+ if (mei_me_hw_use_polling(hw)) {
+ hw->is_active = true;
+ wake_up(&hw->wait_active);
+ }
+
mutex_unlock(&dev->device_lock);
irq_ret = mei_me_irq_thread_handler(1, dev);
diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
index cf2b8261da14..708765056af2 100644
--- a/drivers/misc/mei/hbm.c
+++ b/drivers/misc/mei/hbm.c
@@ -232,7 +232,7 @@ int mei_hbm_start_wait(struct mei_device *dev)
mutex_unlock(&dev->device_lock);
ret = wait_event_timeout(dev->wait_hbm_start,
dev->hbm_state != MEI_HBM_STARTING,
- mei_secs_to_jiffies(MEI_HBM_TIMEOUT));
+ dev->timeouts.hbm);
mutex_lock(&dev->device_lock);
if (ret == 0 && (dev->hbm_state <= MEI_HBM_STARTING)) {
@@ -275,7 +275,7 @@ int mei_hbm_start_req(struct mei_device *dev)
}
dev->hbm_state = MEI_HBM_STARTING;
- dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
+ dev->init_clients_timer = dev->timeouts.client_init;
mei_schedule_stall_timer(dev);
return 0;
}
@@ -316,7 +316,7 @@ static int mei_hbm_dma_setup_req(struct mei_device *dev)
}
dev->hbm_state = MEI_HBM_DR_SETUP;
- dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
+ dev->init_clients_timer = dev->timeouts.client_init;
mei_schedule_stall_timer(dev);
return 0;
}
@@ -351,7 +351,7 @@ static int mei_hbm_capabilities_req(struct mei_device *dev)
}
dev->hbm_state = MEI_HBM_CAP_SETUP;
- dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
+ dev->init_clients_timer = dev->timeouts.client_init;
mei_schedule_stall_timer(dev);
return 0;
}
@@ -385,7 +385,7 @@ static int mei_hbm_enum_clients_req(struct mei_device *dev)
return ret;
}
dev->hbm_state = MEI_HBM_ENUM_CLIENTS;
- dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
+ dev->init_clients_timer = dev->timeouts.client_init;
mei_schedule_stall_timer(dev);
return 0;
}
@@ -751,7 +751,7 @@ static int mei_hbm_prop_req(struct mei_device *dev, unsigned long start_idx)
return ret;
}
- dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
+ dev->init_clients_timer = dev->timeouts.client_init;
mei_schedule_stall_timer(dev);
return 0;
diff --git a/drivers/misc/mei/hw-me-regs.h b/drivers/misc/mei/hw-me-regs.h
index 15e8e2b322b1..8049f288f74c 100644
--- a/drivers/misc/mei/hw-me-regs.h
+++ b/drivers/misc/mei/hw-me-regs.h
@@ -127,6 +127,8 @@
# define PCI_CFG_HFS_3_FW_SKU_SPS 0x00000060
#define PCI_CFG_HFS_4 0x64
#define PCI_CFG_HFS_5 0x68
+# define GSC_CFG_HFS_5_BOOT_TYPE_MSK 0x00000003
+# define GSC_CFG_HFS_5_BOOT_TYPE_PXP 3
#define PCI_CFG_HFS_6 0x6C
/* MEI registers */
@@ -143,6 +145,11 @@
/* H_D0I3C - D0I3 Control */
#define H_D0I3C 0x800
+#define H_GSC_EXT_OP_MEM_BASE_ADDR_LO_REG 0x100
+#define H_GSC_EXT_OP_MEM_BASE_ADDR_HI_REG 0x104
+#define H_GSC_EXT_OP_MEM_LIMIT_REG 0x108
+#define GSC_EXT_OP_MEM_VALID BIT(31)
+
/* register bits of H_CSR (Host Control Status register) */
/* Host Circular Buffer Depth - maximum number of 32-bit entries in CB */
#define H_CBD 0xFF000000
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 3a95fe7d4e33..ed3f361fd3a6 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -10,6 +10,7 @@
#include <linux/interrupt.h>
#include <linux/pm_runtime.h>
#include <linux/sizes.h>
+#include <linux/delay.h>
#include "mei_dev.h"
#include "hbm.h"
@@ -327,9 +328,12 @@ static void mei_me_intr_clear(struct mei_device *dev)
*/
static void mei_me_intr_enable(struct mei_device *dev)
{
- u32 hcsr = mei_hcsr_read(dev);
+ u32 hcsr;
- hcsr |= H_CSR_IE_MASK;
+ if (mei_me_hw_use_polling(to_me_hw(dev)))
+ return;
+
+ hcsr = mei_hcsr_read(dev) | H_CSR_IE_MASK;
mei_hcsr_set(dev, hcsr);
}
@@ -354,6 +358,9 @@ static void mei_me_synchronize_irq(struct mei_device *dev)
{
struct mei_me_hw *hw = to_me_hw(dev);
+ if (mei_me_hw_use_polling(hw))
+ return;
+
synchronize_irq(hw->irq);
}
@@ -380,7 +387,10 @@ static void mei_me_host_set_ready(struct mei_device *dev)
{
u32 hcsr = mei_hcsr_read(dev);
- hcsr |= H_CSR_IE_MASK | H_IG | H_RDY;
+ if (!mei_me_hw_use_polling(to_me_hw(dev)))
+ hcsr |= H_CSR_IE_MASK;
+
+ hcsr |= H_IG | H_RDY;
mei_hcsr_set(dev, hcsr);
}
@@ -423,6 +433,29 @@ static bool mei_me_hw_is_resetting(struct mei_device *dev)
return (mecsr & ME_RST_HRA) == ME_RST_HRA;
}
+/**
+ * mei_gsc_pxp_check - check for gsc firmware entering pxp mode
+ *
+ * @dev: the device structure
+ */
+static void mei_gsc_pxp_check(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ u32 fwsts5 = 0;
+
+ if (dev->pxp_mode == MEI_DEV_PXP_DEFAULT)
+ return;
+
+ hw->read_fws(dev, PCI_CFG_HFS_5, &fwsts5);
+ trace_mei_pci_cfg_read(dev->dev, "PCI_CFG_HFS_5", PCI_CFG_HFS_5, fwsts5);
+ if ((fwsts5 & GSC_CFG_HFS_5_BOOT_TYPE_MSK) == GSC_CFG_HFS_5_BOOT_TYPE_PXP) {
+ dev_dbg(dev->dev, "pxp mode is ready 0x%08x\n", fwsts5);
+ dev->pxp_mode = MEI_DEV_PXP_READY;
+ } else {
+ dev_dbg(dev->dev, "pxp mode is not ready 0x%08x\n", fwsts5);
+ }
+}
+
/**
* mei_me_hw_ready_wait - wait until the me(hw) has turned ready
* or timeout is reached
@@ -435,13 +468,15 @@ static int mei_me_hw_ready_wait(struct mei_device *dev)
mutex_unlock(&dev->device_lock);
wait_event_timeout(dev->wait_hw_ready,
dev->recvd_hw_ready,
- mei_secs_to_jiffies(MEI_HW_READY_TIMEOUT));
+ dev->timeouts.hw_ready);
mutex_lock(&dev->device_lock);
if (!dev->recvd_hw_ready) {
dev_err(dev->dev, "wait hw ready failed\n");
return -ETIME;
}
+ mei_gsc_pxp_check(dev);
+
mei_me_hw_reset_release(dev);
dev->recvd_hw_ready = false;
return 0;
@@ -697,7 +732,6 @@ static void mei_me_pg_unset(struct mei_device *dev)
static int mei_me_pg_legacy_enter_sync(struct mei_device *dev)
{
struct mei_me_hw *hw = to_me_hw(dev);
- unsigned long timeout = mei_secs_to_jiffies(MEI_PGI_TIMEOUT);
int ret;
dev->pg_event = MEI_PG_EVENT_WAIT;
@@ -708,7 +742,8 @@ static int mei_me_pg_legacy_enter_sync(struct mei_device *dev)
mutex_unlock(&dev->device_lock);
wait_event_timeout(dev->wait_pg,
- dev->pg_event == MEI_PG_EVENT_RECEIVED, timeout);
+ dev->pg_event == MEI_PG_EVENT_RECEIVED,
+ dev->timeouts.pgi);
mutex_lock(&dev->device_lock);
if (dev->pg_event == MEI_PG_EVENT_RECEIVED) {
@@ -734,7 +769,6 @@ static int mei_me_pg_legacy_enter_sync(struct mei_device *dev)
static int mei_me_pg_legacy_exit_sync(struct mei_device *dev)
{
struct mei_me_hw *hw = to_me_hw(dev);
- unsigned long timeout = mei_secs_to_jiffies(MEI_PGI_TIMEOUT);
int ret;
if (dev->pg_event == MEI_PG_EVENT_RECEIVED)
@@ -746,7 +780,8 @@ static int mei_me_pg_legacy_exit_sync(struct mei_device *dev)
mutex_unlock(&dev->device_lock);
wait_event_timeout(dev->wait_pg,
- dev->pg_event == MEI_PG_EVENT_RECEIVED, timeout);
+ dev->pg_event == MEI_PG_EVENT_RECEIVED,
+ dev->timeouts.pgi);
mutex_lock(&dev->device_lock);
reply:
@@ -762,7 +797,8 @@ static int mei_me_pg_legacy_exit_sync(struct mei_device *dev)
mutex_unlock(&dev->device_lock);
wait_event_timeout(dev->wait_pg,
- dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED, timeout);
+ dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED,
+ dev->timeouts.pgi);
mutex_lock(&dev->device_lock);
if (dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED)
@@ -877,8 +913,6 @@ static u32 mei_me_d0i3_unset(struct mei_device *dev)
static int mei_me_d0i3_enter_sync(struct mei_device *dev)
{
struct mei_me_hw *hw = to_me_hw(dev);
- unsigned long d0i3_timeout = mei_secs_to_jiffies(MEI_D0I3_TIMEOUT);
- unsigned long pgi_timeout = mei_secs_to_jiffies(MEI_PGI_TIMEOUT);
int ret;
u32 reg;
@@ -900,7 +934,8 @@ static int mei_me_d0i3_enter_sync(struct mei_device *dev)
mutex_unlock(&dev->device_lock);
wait_event_timeout(dev->wait_pg,
- dev->pg_event == MEI_PG_EVENT_RECEIVED, pgi_timeout);
+ dev->pg_event == MEI_PG_EVENT_RECEIVED,
+ dev->timeouts.pgi);
mutex_lock(&dev->device_lock);
if (dev->pg_event != MEI_PG_EVENT_RECEIVED) {
@@ -920,7 +955,8 @@ static int mei_me_d0i3_enter_sync(struct mei_device *dev)
mutex_unlock(&dev->device_lock);
wait_event_timeout(dev->wait_pg,
- dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED, d0i3_timeout);
+ dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED,
+ dev->timeouts.d0i3);
mutex_lock(&dev->device_lock);
if (dev->pg_event != MEI_PG_EVENT_INTR_RECEIVED) {
@@ -980,7 +1016,6 @@ static int mei_me_d0i3_enter(struct mei_device *dev)
static int mei_me_d0i3_exit_sync(struct mei_device *dev)
{
struct mei_me_hw *hw = to_me_hw(dev);
- unsigned long timeout = mei_secs_to_jiffies(MEI_D0I3_TIMEOUT);
int ret;
u32 reg;
@@ -1003,7 +1038,8 @@ static int mei_me_d0i3_exit_sync(struct mei_device *dev)
mutex_unlock(&dev->device_lock);
wait_event_timeout(dev->wait_pg,
- dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED, timeout);
+ dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED,
+ dev->timeouts.pgi);
mutex_lock(&dev->device_lock);
if (dev->pg_event != MEI_PG_EVENT_INTR_RECEIVED) {
@@ -1176,7 +1212,7 @@ static int mei_me_hw_reset(struct mei_device *dev, bool intr_enable)
hcsr |= H_RST | H_IG | H_CSR_IS_MASK;
- if (!intr_enable)
+ if (!intr_enable || mei_me_hw_use_polling(to_me_hw(dev)))
hcsr &= ~H_CSR_IE_MASK;
dev->recvd_hw_ready = false;
@@ -1259,7 +1295,8 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)
/* check if ME wants a reset */
if (!mei_hw_is_ready(dev) && dev->dev_state != MEI_DEV_RESETTING) {
- dev_warn(dev->dev, "FW not ready: resetting.\n");
+ dev_warn(dev->dev, "FW not ready: resetting: dev_state = %d pxp = %d\n",
+ dev->dev_state, dev->pxp_mode);
if (dev->dev_state == MEI_DEV_POWERING_DOWN ||
dev->dev_state == MEI_DEV_POWER_DOWN)
mei_cl_all_disconnect(dev);
@@ -1331,6 +1368,46 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)
}
EXPORT_SYMBOL_GPL(mei_me_irq_thread_handler);
+#define MEI_POLLING_TIMEOUT_ACTIVE 100
+#define MEI_POLLING_TIMEOUT_IDLE 500
+
+int mei_me_polling_thread(void *_dev)
+{
+ struct mei_device *dev = _dev;
+ irqreturn_t irq_ret;
+ long polling_timeout = MEI_POLLING_TIMEOUT_ACTIVE;
+
+ dev_dbg(dev->dev, "kernel thread is running\n");
+ while (!kthread_should_stop()) {
+ struct mei_me_hw *hw = to_me_hw(dev);
+ u32 hcsr;
+
+ wait_event_timeout(hw->wait_active,
+ hw->is_active || kthread_should_stop(),
+ msecs_to_jiffies(MEI_POLLING_TIMEOUT_IDLE));
+
+ if (kthread_should_stop())
+ break;
+
+ hcsr = mei_hcsr_read(dev);
+ if (me_intr_src(hcsr)) {
+ polling_timeout = MEI_POLLING_TIMEOUT_ACTIVE;
+ irq_ret = mei_me_irq_thread_handler(1, dev);
+ if (irq_ret != IRQ_HANDLED)
+ dev_err(dev->dev, "irq_ret %d\n", irq_ret);
+ } else {
+ polling_timeout = clamp_val(polling_timeout + MEI_POLLING_TIMEOUT_ACTIVE,
+ MEI_POLLING_TIMEOUT_ACTIVE,
+ MEI_POLLING_TIMEOUT_IDLE);
+ }
+
+ schedule_timeout_interruptible(msecs_to_jiffies(polling_timeout));
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mei_me_polling_thread);
+
static const struct mei_hw_ops mei_me_hw_ops = {
.trc_status = mei_me_trc_status,
@@ -1636,11 +1713,12 @@ EXPORT_SYMBOL_GPL(mei_me_get_cfg);
*
* @parent: device associated with physical device (pci/platform)
* @cfg: per device generation config
+ * @slow_fw: configure longer timeouts as FW is slow
*
* Return: The mei_device pointer on success, NULL on failure.
*/
struct mei_device *mei_me_dev_init(struct device *parent,
- const struct mei_cfg *cfg)
+ const struct mei_cfg *cfg, bool slow_fw)
{
struct mei_device *dev;
struct mei_me_hw *hw;
@@ -1655,7 +1733,7 @@ struct mei_device *mei_me_dev_init(struct device *parent,
for (i = 0; i < DMA_DSCR_NUM; i++)
dev->dr_dscr[i].size = cfg->dma_size[i];
- mei_device_init(dev, parent, &mei_me_hw_ops);
+ mei_device_init(dev, parent, slow_fw, &mei_me_hw_ops);
hw->cfg = cfg;
dev->fw_f_fw_ver_supported = cfg->fw_ver_supported;
diff --git a/drivers/misc/mei/hw-me.h b/drivers/misc/mei/hw-me.h
index a071c645e905..0e9d90808bcf 100644
--- a/drivers/misc/mei/hw-me.h
+++ b/drivers/misc/mei/hw-me.h
@@ -51,6 +51,8 @@ struct mei_cfg {
* @d0i3_supported: di03 support
* @hbuf_depth: depth of hardware host/write buffer in slots
* @read_fws: read FW status register handler
+ * @wait_active: the polling thread activity wait queue
+ * @is_active: the device is active
*/
struct mei_me_hw {
const struct mei_cfg *cfg;
@@ -60,10 +62,19 @@ struct mei_me_hw {
bool d0i3_supported;
u8 hbuf_depth;
int (*read_fws)(const struct mei_device *dev, int where, u32 *val);
+ /* polling */
+ struct task_struct *polling_thread;
+ wait_queue_head_t wait_active;
+ bool is_active;
};
#define to_me_hw(dev) (struct mei_me_hw *)((dev)->hw)
+static inline bool mei_me_hw_use_polling(const struct mei_me_hw *hw)
+{
+ return hw->irq < 0;
+}
+
/**
* enum mei_cfg_idx - indices to platform specific configurations.
*
@@ -120,12 +131,13 @@ enum mei_cfg_idx {
const struct mei_cfg *mei_me_get_cfg(kernel_ulong_t idx);
struct mei_device *mei_me_dev_init(struct device *parent,
- const struct mei_cfg *cfg);
+ const struct mei_cfg *cfg, bool slow_fw);
int mei_me_pg_enter_sync(struct mei_device *dev);
int mei_me_pg_exit_sync(struct mei_device *dev);
irqreturn_t mei_me_irq_quick_handler(int irq, void *dev_id);
irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id);
+int mei_me_polling_thread(void *_dev);
#endif /* _MEI_INTERFACE_H_ */
diff --git a/drivers/misc/mei/hw-txe.c b/drivers/misc/mei/hw-txe.c
index 00652c137cc7..fccfa806bd63 100644
--- a/drivers/misc/mei/hw-txe.c
+++ b/drivers/misc/mei/hw-txe.c
@@ -1201,7 +1201,7 @@ struct mei_device *mei_txe_dev_init(struct pci_dev *pdev)
if (!dev)
return NULL;
- mei_device_init(dev, &pdev->dev, &mei_txe_hw_ops);
+ mei_device_init(dev, &pdev->dev, false, &mei_txe_hw_ops);
hw = to_txe_hw(dev);
diff --git a/drivers/misc/mei/hw.h b/drivers/misc/mei/hw.h
index b46077b17114..9381e5c13b4f 100644
--- a/drivers/misc/mei/hw.h
+++ b/drivers/misc/mei/hw.h
@@ -16,11 +16,16 @@
#define MEI_CONNECT_TIMEOUT 3 /* HPS: at least 2 seconds */
#define MEI_CL_CONNECT_TIMEOUT 15 /* HPS: Client Connect Timeout */
+#define MEI_CL_CONNECT_TIMEOUT_SLOW 30 /* HPS: Client Connect Timeout, slow FW */
#define MEI_CLIENTS_INIT_TIMEOUT 15 /* HPS: Clients Enumeration Timeout */
#define MEI_PGI_TIMEOUT 1 /* PG Isolation time response 1 sec */
#define MEI_D0I3_TIMEOUT 5 /* D0i3 set/unset max response time */
#define MEI_HBM_TIMEOUT 1 /* 1 second */
+#define MEI_HBM_TIMEOUT_SLOW 5 /* 5 second, slow FW */
+
+#define MKHI_RCV_TIMEOUT 500 /* receive timeout in msec */
+#define MKHI_RCV_TIMEOUT_SLOW 10000 /* receive timeout in msec, slow FW */
/*
* FW page size for DMA allocations
diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c
index eb052005ca86..ce030a882d0c 100644
--- a/drivers/misc/mei/init.c
+++ b/drivers/misc/mei/init.c
@@ -320,6 +320,8 @@ void mei_stop(struct mei_device *dev)
mei_clear_interrupts(dev);
mei_synchronize_irq(dev);
+ /* to catch HW-initiated reset */
+ mei_cancel_work(dev);
mutex_lock(&dev->device_lock);
@@ -357,14 +359,16 @@ bool mei_write_is_idle(struct mei_device *dev)
EXPORT_SYMBOL_GPL(mei_write_is_idle);
/**
- * mei_device_init -- initialize mei_device structure
+ * mei_device_init - initialize mei_device structure
*
* @dev: the mei device
* @device: the device structure
+ * @slow_fw: configure longer timeouts as FW is slow
* @hw_ops: hw operations
*/
void mei_device_init(struct mei_device *dev,
struct device *device,
+ bool slow_fw,
const struct mei_hw_ops *hw_ops)
{
/* setup our list array */
@@ -402,6 +406,21 @@ void mei_device_init(struct mei_device *dev,
dev->pg_event = MEI_PG_EVENT_IDLE;
dev->ops = hw_ops;
dev->dev = device;
+
+ dev->timeouts.hw_ready = mei_secs_to_jiffies(MEI_HW_READY_TIMEOUT);
+ dev->timeouts.connect = MEI_CONNECT_TIMEOUT;
+ dev->timeouts.client_init = MEI_CLIENTS_INIT_TIMEOUT;
+ dev->timeouts.pgi = mei_secs_to_jiffies(MEI_PGI_TIMEOUT);
+ dev->timeouts.d0i3 = mei_secs_to_jiffies(MEI_D0I3_TIMEOUT);
+ if (slow_fw) {
+ dev->timeouts.cl_connect = mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT_SLOW);
+ dev->timeouts.hbm = mei_secs_to_jiffies(MEI_HBM_TIMEOUT_SLOW);
+ dev->timeouts.mkhi_recv = msecs_to_jiffies(MKHI_RCV_TIMEOUT_SLOW);
+ } else {
+ dev->timeouts.cl_connect = mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT);
+ dev->timeouts.hbm = mei_secs_to_jiffies(MEI_HBM_TIMEOUT);
+ dev->timeouts.mkhi_recv = msecs_to_jiffies(MKHI_RCV_TIMEOUT);
+ }
}
EXPORT_SYMBOL_GPL(mei_device_init);
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index 786f7c8f7f61..261939b945ef 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -571,7 +571,7 @@ static int mei_ioctl_connect_vtag(struct file *file,
cl->state == MEI_FILE_DISCONNECTED ||
cl->state == MEI_FILE_DISCONNECT_REQUIRED ||
cl->state == MEI_FILE_DISCONNECT_REPLY),
- mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
+ dev->timeouts.cl_connect);
mutex_lock(&dev->device_lock);
}
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 694f866f87ef..7c508bca9a00 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -62,6 +62,14 @@ enum mei_dev_state {
MEI_DEV_POWER_UP
};
+/* MEI PXP mode state */
+enum mei_dev_pxp_mode {
+ MEI_DEV_PXP_DEFAULT = 0,
+ MEI_DEV_PXP_INIT = 1,
+ MEI_DEV_PXP_SETUP = 2,
+ MEI_DEV_PXP_READY = 3,
+};
+
const char *mei_dev_state_str(int state);
enum mei_file_transaction_states {
@@ -415,6 +423,17 @@ struct mei_fw_version {
#define MEI_MAX_FW_VER_BLOCKS 3
+struct mei_dev_timeouts {
+ unsigned long hw_ready; /* Timeout on ready message, in jiffies */
+ int connect; /* HPS: at least 2 seconds, in seconds */
+ unsigned long cl_connect; /* HPS: Client Connect Timeout, in jiffies */
+ int client_init; /* HPS: Clients Enumeration Timeout, in seconds */
+ unsigned long pgi; /* PG Isolation time response, in jiffies */
+ unsigned int d0i3; /* D0i3 set/unset max response time, in jiffies */
+ unsigned long hbm; /* HBM operation timeout, in jiffies */
+ unsigned long mkhi_recv; /* receive timeout, in jiffies */
+};
+
/**
* struct mei_device - MEI private device struct
*
@@ -443,6 +462,7 @@ struct mei_fw_version {
* @reset_count : number of consecutive resets
* @dev_state : device state
* @hbm_state : state of host bus message protocol
+ * @pxp_mode : PXP device mode
* @init_clients_timer : HBM init handshake timeout
*
* @pg_event : power gating event
@@ -480,6 +500,8 @@ struct mei_fw_version {
* @allow_fixed_address: allow user space to connect a fixed client
* @override_fixed_address: force allow fixed address behavior
*
+ * @timeouts: actual timeout values
+ *
* @reset_work : work item for the device reset
* @bus_rescan_work : work item for the bus rescan
*
@@ -524,6 +546,7 @@ struct mei_device {
unsigned long reset_count;
enum mei_dev_state dev_state;
enum mei_hbm_state hbm_state;
+ enum mei_dev_pxp_mode pxp_mode;
u16 init_clients_timer;
/*
@@ -568,6 +591,8 @@ struct mei_device {
bool allow_fixed_address;
bool override_fixed_address;
+ struct mei_dev_timeouts timeouts;
+
struct work_struct reset_work;
struct work_struct bus_rescan_work;
@@ -632,6 +657,7 @@ static inline u32 mei_slots2data(int slots)
*/
void mei_device_init(struct mei_device *dev,
struct device *device,
+ bool slow_fw,
const struct mei_hw_ops *hw_ops);
int mei_reset(struct mei_device *dev);
int mei_start(struct mei_device *dev);
diff --git a/drivers/misc/mei/mkhi.h b/drivers/misc/mei/mkhi.h
new file mode 100644
index 000000000000..056b76e73d40
--- /dev/null
+++ b/drivers/misc/mei/mkhi.h
@@ -0,0 +1,57 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2003-2021, Intel Corporation. All rights reserved.
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ */
+
+#ifndef _MEI_MKHI_H_
+#define _MEI_MKHI_H_
+
+#include "mei_dev.h"
+
+#define MKHI_FEATURE_PTT 0x10
+
+#define MKHI_FWCAPS_GROUP_ID 0x3
+#define MKHI_FWCAPS_SET_OS_VER_APP_RULE_CMD 6
+#define MKHI_GEN_GROUP_ID 0xFF
+#define MKHI_GEN_GET_FW_VERSION_CMD 0x2
+
+#define MCHI_GROUP_ID 0xA
+
+#define MKHI_GROUP_ID_GFX 0x30
+#define MKHI_GFX_RESET_WARN_CMD_REQ 0x0
+#define MKHI_GFX_MEMORY_READY_CMD_REQ 0x1
+
+/* Allow transition to PXP mode without approval */
+#define MKHI_GFX_MEM_READY_PXP_ALLOWED 0x1
+
+struct mkhi_rule_id {
+ __le16 rule_type;
+ u8 feature_id;
+ u8 reserved;
+} __packed;
+
+struct mkhi_fwcaps {
+ struct mkhi_rule_id id;
+ u8 len;
+ u8 data[];
+} __packed;
+
+struct mkhi_msg_hdr {
+ u8 group_id;
+ u8 command;
+ u8 reserved;
+ u8 result;
+} __packed;
+
+struct mkhi_msg {
+ struct mkhi_msg_hdr hdr;
+ u8 data[];
+} __packed;
+
+struct mkhi_gfx_mem_ready {
+ struct mkhi_msg_hdr hdr;
+ u32 flags;
+} __packed;
+
+#endif /* _MEI_MKHI_H_ */
diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
index 5435604327a7..b5af4e79bd52 100644
--- a/drivers/misc/mei/pci-me.c
+++ b/drivers/misc/mei/pci-me.c
@@ -203,7 +203,7 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
}
/* allocates and initializes the mei dev structure */
- dev = mei_me_dev_init(&pdev->dev, cfg);
+ dev = mei_me_dev_init(&pdev->dev, cfg, false);
if (!dev) {
err = -ENOMEM;
goto end;
diff --git a/include/linux/mei_aux.h b/include/linux/mei_aux.h
index 587f25128848..506912ad363b 100644
--- a/include/linux/mei_aux.h
+++ b/include/linux/mei_aux.h
@@ -7,10 +7,22 @@
#include <linux/auxiliary_bus.h>
+/**
+ * struct mei_aux_device - mei auxiliary device
+ * @aux_dev: - auxiliary device object
+ * @irq: interrupt driving the mei auxiliary device
+ * @bar: mmio resource bar reserved to mei auxiliary device
+ * @ext_op_mem: resource for extend operational memory
+ * used in graphics PXP mode.
+ * @slow_firmware: The device has slow underlying firmware.
+ * Such firmware will require to use larger operation timeouts.
+ */
struct mei_aux_device {
struct auxiliary_device aux_dev;
int irq;
struct resource bar;
+ struct resource ext_op_mem;
+ bool slow_firmware;
};
#define auxiliary_dev_to_mei_aux_dev(auxiliary_dev) \
--
2.37.2
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