* [char-misc-next 0/3] mei: me: allow mei to be embedded within another pci device.
@ 2019-11-06 22:38 Tomas Winkler
2019-11-06 22:38 ` [char-misc-next 1/3] mei: me: mei_me_dev_init() use struct device instead of struct pci_dev Tomas Winkler
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Tomas Winkler @ 2019-11-06 22:38 UTC (permalink / raw)
To: Greg Kroah-Hartman; +Cc: Alexander Usyskin, linux-kernel, Tomas Winkler
Allow mei to be embedded within another pci device, by detaching
some of the core functions from 'struct pci_dev'
Alexander Usyskin (1):
mei: me: store irq number in the hw struct.
Tomas Winkler (2):
mei: me: mei_me_dev_init() use struct device instead of struct
pci_dev.
mei: abstract fw status register read.
drivers/misc/mei/hw-me.c | 38 +++++++++++++++++++++++---------------
drivers/misc/mei/hw-me.h | 8 ++++++--
drivers/misc/mei/hw-txe.c | 10 +++++++---
drivers/misc/mei/init.c | 6 ++++--
drivers/misc/mei/mei_dev.h | 8 ++++----
drivers/misc/mei/pci-me.c | 11 ++++++++++-
6 files changed, 54 insertions(+), 27 deletions(-)
--
2.21.0
^ permalink raw reply [flat|nested] 4+ messages in thread
* [char-misc-next 1/3] mei: me: mei_me_dev_init() use struct device instead of struct pci_dev.
2019-11-06 22:38 [char-misc-next 0/3] mei: me: allow mei to be embedded within another pci device Tomas Winkler
@ 2019-11-06 22:38 ` Tomas Winkler
2019-11-06 22:38 ` [char-misc-next 2/3] mei: me: store irq number in the hw struct Tomas Winkler
2019-11-06 22:38 ` [char-misc-next 3/3] mei: abstract fw status register read Tomas Winkler
2 siblings, 0 replies; 4+ messages in thread
From: Tomas Winkler @ 2019-11-06 22:38 UTC (permalink / raw)
To: Greg Kroah-Hartman; +Cc: Alexander Usyskin, linux-kernel, Tomas Winkler
It's enough to bind mei_device with associated 'struct device' instead
of actual 'struct pci_dev'. This is to allow working with mei devices
embedded within another pci device, usually via MFD framework,
where mei device is represented as a platform device.
Bump copyright year to 2019 on effected files.
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
drivers/misc/mei/hw-me.c | 10 +++++-----
drivers/misc/mei/hw-me.h | 4 ++--
drivers/misc/mei/pci-me.c | 2 +-
3 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 5ef30c7c92b3..7d241c70e3e0 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
/*
- * Copyright (c) 2003-2018, Intel Corporation. All rights reserved.
+ * Copyright (c) 2003-2019, Intel Corporation. All rights reserved.
* Intel Management Engine Interface (Intel MEI) Linux driver
*/
@@ -1461,19 +1461,19 @@ const struct mei_cfg *mei_me_get_cfg(kernel_ulong_t idx)
/**
* mei_me_dev_init - allocates and initializes the mei device structure
*
- * @pdev: The pci device structure
+ * @parent: device associated with physical device (pci/platform)
* @cfg: per device generation config
*
* Return: The mei_device pointer on success, NULL on failure.
*/
-struct mei_device *mei_me_dev_init(struct pci_dev *pdev,
+struct mei_device *mei_me_dev_init(struct device *parent,
const struct mei_cfg *cfg)
{
struct mei_device *dev;
struct mei_me_hw *hw;
int i;
- dev = devm_kzalloc(&pdev->dev, sizeof(struct mei_device) +
+ dev = devm_kzalloc(parent, sizeof(struct mei_device) +
sizeof(struct mei_me_hw), GFP_KERNEL);
if (!dev)
return NULL;
@@ -1483,7 +1483,7 @@ struct mei_device *mei_me_dev_init(struct pci_dev *pdev,
for (i = 0; i < DMA_DSCR_NUM; i++)
dev->dr_dscr[i].size = cfg->dma_size[i];
- mei_device_init(dev, &pdev->dev, &mei_me_hw_ops);
+ mei_device_init(dev, parent, &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 1d8794828cbc..b39347faadf5 100644
--- a/drivers/misc/mei/hw-me.h
+++ b/drivers/misc/mei/hw-me.h
@@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
- * Copyright (c) 2012-2018, Intel Corporation. All rights reserved.
+ * Copyright (c) 2012-2019, Intel Corporation. All rights reserved.
* Intel Management Engine Interface (Intel MEI) Linux driver
*/
@@ -91,7 +91,7 @@ enum mei_cfg_idx {
const struct mei_cfg *mei_me_get_cfg(kernel_ulong_t idx);
-struct mei_device *mei_me_dev_init(struct pci_dev *pdev,
+struct mei_device *mei_me_dev_init(struct device *parent,
const struct mei_cfg *cfg);
int mei_me_pg_enter_sync(struct mei_device *dev);
diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
index ce43415a536c..e382ecca96d7 100644
--- a/drivers/misc/mei/pci-me.c
+++ b/drivers/misc/mei/pci-me.c
@@ -192,7 +192,7 @@ 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, cfg);
+ dev = mei_me_dev_init(&pdev->dev, cfg);
if (!dev) {
err = -ENOMEM;
goto end;
--
2.21.0
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [char-misc-next 2/3] mei: me: store irq number in the hw struct.
2019-11-06 22:38 [char-misc-next 0/3] mei: me: allow mei to be embedded within another pci device Tomas Winkler
2019-11-06 22:38 ` [char-misc-next 1/3] mei: me: mei_me_dev_init() use struct device instead of struct pci_dev Tomas Winkler
@ 2019-11-06 22:38 ` Tomas Winkler
2019-11-06 22:38 ` [char-misc-next 3/3] mei: abstract fw status register read Tomas Winkler
2 siblings, 0 replies; 4+ messages in thread
From: Tomas Winkler @ 2019-11-06 22:38 UTC (permalink / raw)
To: Greg Kroah-Hartman; +Cc: Alexander Usyskin, linux-kernel, Tomas Winkler
From: Alexander Usyskin <alexander.usyskin@intel.com>
Store irq number in hw struct to by used by synchronize_irq().
This is to allow working with mei devices
embedded within another pci devices, via MFD framework,
where mei device is represented as a platform device.
Bump the copyright year to 2019 on hw-me.c and hw-me.h
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
drivers/misc/mei/hw-me.c | 4 ++--
drivers/misc/mei/hw-me.h | 2 ++
drivers/misc/mei/pci-me.c | 1 +
3 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 7d241c70e3e0..23606d0ddcd6 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -323,9 +323,9 @@ static void mei_me_intr_disable(struct mei_device *dev)
*/
static void mei_me_synchronize_irq(struct mei_device *dev)
{
- struct pci_dev *pdev = to_pci_dev(dev->dev);
+ struct mei_me_hw *hw = to_me_hw(dev);
- synchronize_irq(pdev->irq);
+ synchronize_irq(hw->irq);
}
/**
diff --git a/drivers/misc/mei/hw-me.h b/drivers/misc/mei/hw-me.h
index b39347faadf5..c45b32a7cc46 100644
--- a/drivers/misc/mei/hw-me.h
+++ b/drivers/misc/mei/hw-me.h
@@ -42,6 +42,7 @@ struct mei_cfg {
*
* @cfg: per device generation config and ops
* @mem_addr: io memory address
+ * @irq: irq number
* @pg_state: power gating state
* @d0i3_supported: di03 support
* @hbuf_depth: depth of hardware host/write buffer in slots
@@ -49,6 +50,7 @@ struct mei_cfg {
struct mei_me_hw {
const struct mei_cfg *cfg;
void __iomem *mem_addr;
+ int irq;
enum mei_pg_state pg_state;
bool d0i3_supported;
u8 hbuf_depth;
diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
index e382ecca96d7..6233b3ca1c1d 100644
--- a/drivers/misc/mei/pci-me.c
+++ b/drivers/misc/mei/pci-me.c
@@ -199,6 +199,7 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
}
hw = to_me_hw(dev);
hw->mem_addr = pcim_iomap_table(pdev)[0];
+ hw->irq = pdev->irq;
pci_enable_msi(pdev);
--
2.21.0
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [char-misc-next 3/3] mei: abstract fw status register read.
2019-11-06 22:38 [char-misc-next 0/3] mei: me: allow mei to be embedded within another pci device Tomas Winkler
2019-11-06 22:38 ` [char-misc-next 1/3] mei: me: mei_me_dev_init() use struct device instead of struct pci_dev Tomas Winkler
2019-11-06 22:38 ` [char-misc-next 2/3] mei: me: store irq number in the hw struct Tomas Winkler
@ 2019-11-06 22:38 ` Tomas Winkler
2 siblings, 0 replies; 4+ messages in thread
From: Tomas Winkler @ 2019-11-06 22:38 UTC (permalink / raw)
To: Greg Kroah-Hartman; +Cc: Alexander Usyskin, linux-kernel, Tomas Winkler
This is to allow working with mei devices embedded within
another pci device, where mei device is represented
as a platform child device and fw status registers
are not necessarily resident in the device pci config space.
Bump the copyright year to 2019 on the modified files.
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
drivers/misc/mei/hw-me.c | 24 ++++++++++++++++--------
drivers/misc/mei/hw-me.h | 2 ++
drivers/misc/mei/hw-txe.c | 10 +++++++---
drivers/misc/mei/init.c | 6 ++++--
drivers/misc/mei/mei_dev.h | 8 ++++----
drivers/misc/mei/pci-me.c | 8 ++++++++
6 files changed, 41 insertions(+), 17 deletions(-)
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 23606d0ddcd6..0ec55431e26b 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -183,20 +183,19 @@ static inline void mei_me_d0i3c_write(struct mei_device *dev, u32 reg)
static int mei_me_fw_status(struct mei_device *dev,
struct mei_fw_status *fw_status)
{
- struct pci_dev *pdev = to_pci_dev(dev->dev);
struct mei_me_hw *hw = to_me_hw(dev);
const struct mei_fw_status *fw_src = &hw->cfg->fw_status;
int ret;
int i;
- if (!fw_status)
+ if (!fw_status || !hw->read_fws)
return -EINVAL;
fw_status->count = fw_src->count;
for (i = 0; i < fw_src->count && i < MEI_FW_STATUS_MAX; i++) {
- ret = pci_read_config_dword(pdev, fw_src->status[i],
- &fw_status->status[i]);
- trace_mei_pci_cfg_read(dev->dev, "PCI_CFG_HSF_X",
+ ret = hw->read_fws(dev, fw_src->status[i],
+ &fw_status->status[i]);
+ trace_mei_pci_cfg_read(dev->dev, "PCI_CFG_HFS_X",
fw_src->status[i],
fw_status->status[i]);
if (ret)
@@ -210,19 +209,26 @@ static int mei_me_fw_status(struct mei_device *dev,
* mei_me_hw_config - configure hw dependent settings
*
* @dev: mei device
+ *
+ * Return:
+ * * -EINVAL when read_fws is not set
+ * * 0 on success
+ *
*/
-static void mei_me_hw_config(struct mei_device *dev)
+static int mei_me_hw_config(struct mei_device *dev)
{
- struct pci_dev *pdev = to_pci_dev(dev->dev);
struct mei_me_hw *hw = to_me_hw(dev);
u32 hcsr, reg;
+ if (WARN_ON(!hw->read_fws))
+ return -EINVAL;
+
/* Doesn't change in runtime */
hcsr = mei_hcsr_read(dev);
hw->hbuf_depth = (hcsr & H_CBD) >> 24;
reg = 0;
- pci_read_config_dword(pdev, PCI_CFG_HFS_1, ®);
+ hw->read_fws(dev, PCI_CFG_HFS_1, ®);
trace_mei_pci_cfg_read(dev->dev, "PCI_CFG_HFS_1", PCI_CFG_HFS_1, reg);
hw->d0i3_supported =
((reg & PCI_CFG_HFS_1_D0I3_MSK) == PCI_CFG_HFS_1_D0I3_MSK);
@@ -233,6 +239,8 @@ static void mei_me_hw_config(struct mei_device *dev)
if (reg & H_D0I3C_I3)
hw->pg_state = MEI_PG_ON;
}
+
+ return 0;
}
/**
diff --git a/drivers/misc/mei/hw-me.h b/drivers/misc/mei/hw-me.h
index c45b32a7cc46..3352d19b8e85 100644
--- a/drivers/misc/mei/hw-me.h
+++ b/drivers/misc/mei/hw-me.h
@@ -46,6 +46,7 @@ struct mei_cfg {
* @pg_state: power gating state
* @d0i3_supported: di03 support
* @hbuf_depth: depth of hardware host/write buffer in slots
+ * @read_fws: read FW status register handler
*/
struct mei_me_hw {
const struct mei_cfg *cfg;
@@ -54,6 +55,7 @@ struct mei_me_hw {
enum mei_pg_state pg_state;
bool d0i3_supported;
u8 hbuf_depth;
+ int (*read_fws)(const struct mei_device *dev, int where, u32 *val);
};
#define to_me_hw(dev) (struct mei_me_hw *)((dev)->hw)
diff --git a/drivers/misc/mei/hw-txe.c b/drivers/misc/mei/hw-txe.c
index 5e58656b8e19..785b260b3ae9 100644
--- a/drivers/misc/mei/hw-txe.c
+++ b/drivers/misc/mei/hw-txe.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
/*
- * Copyright (c) 2013-2014, Intel Corporation. All rights reserved.
+ * Copyright (c) 2013-2019, Intel Corporation. All rights reserved.
* Intel Management Engine Interface (Intel MEI) Linux driver
*/
@@ -660,14 +660,16 @@ static int mei_txe_fw_status(struct mei_device *dev,
}
/**
- * mei_txe_hw_config - configure hardware at the start of the devices
+ * mei_txe_hw_config - configure hardware at the start of the devices
*
* @dev: the device structure
*
* Configure hardware at the start of the device should be done only
* once at the device probe time
+ *
+ * Return: always 0
*/
-static void mei_txe_hw_config(struct mei_device *dev)
+static int mei_txe_hw_config(struct mei_device *dev)
{
struct mei_txe_hw *hw = to_txe_hw(dev);
@@ -677,6 +679,8 @@ static void mei_txe_hw_config(struct mei_device *dev)
dev_dbg(dev->dev, "aliveness_resp = 0x%08x, readiness = 0x%08x.\n",
hw->aliveness, hw->readiness);
+
+ return 0;
}
/**
diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c
index b9fef773e71b..bcee77768b91 100644
--- a/drivers/misc/mei/init.c
+++ b/drivers/misc/mei/init.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
/*
- * Copyright (c) 2012-2018, Intel Corporation. All rights reserved.
+ * Copyright (c) 2012-2019, Intel Corporation. All rights reserved.
* Intel Management Engine Interface (Intel MEI) Linux driver
*/
@@ -190,7 +190,9 @@ int mei_start(struct mei_device *dev)
/* acknowledge interrupt and stop interrupts */
mei_clear_interrupts(dev);
- mei_hw_config(dev);
+ ret = mei_hw_config(dev);
+ if (ret)
+ goto err;
dev_dbg(dev->dev, "reset in start the mei device.\n");
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 0f2141178299..e0ac660c96e7 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
- * Copyright (c) 2003-2018, Intel Corporation. All rights reserved.
+ * Copyright (c) 2003-2019, Intel Corporation. All rights reserved.
* Intel Management Engine Interface (Intel MEI) Linux driver
*/
@@ -287,7 +287,7 @@ struct mei_hw_ops {
bool (*hw_is_ready)(struct mei_device *dev);
int (*hw_reset)(struct mei_device *dev, bool enable);
int (*hw_start)(struct mei_device *dev);
- void (*hw_config)(struct mei_device *dev);
+ int (*hw_config)(struct mei_device *dev);
int (*fw_status)(struct mei_device *dev, struct mei_fw_status *fw_sts);
enum mei_pg_state (*pg_state)(struct mei_device *dev);
@@ -614,9 +614,9 @@ void mei_irq_compl_handler(struct mei_device *dev, struct list_head *cmpl_list);
*/
-static inline void mei_hw_config(struct mei_device *dev)
+static inline int mei_hw_config(struct mei_device *dev)
{
- dev->ops->hw_config(dev);
+ return dev->ops->hw_config(dev);
}
static inline enum mei_pg_state mei_pg_state(struct mei_device *dev)
diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
index 6233b3ca1c1d..1de6daf38602 100644
--- a/drivers/misc/mei/pci-me.c
+++ b/drivers/misc/mei/pci-me.c
@@ -121,6 +121,13 @@ static inline void mei_me_set_pm_domain(struct mei_device *dev) {}
static inline void mei_me_unset_pm_domain(struct mei_device *dev) {}
#endif /* CONFIG_PM */
+static int mei_me_read_fws(const struct mei_device *dev, int where, u32 *val)
+{
+ struct pci_dev *pdev = to_pci_dev(dev->dev);
+
+ return pci_read_config_dword(pdev, where, val);
+}
+
/**
* mei_me_quirk_probe - probe for devices that doesn't valid ME interface
*
@@ -200,6 +207,7 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
hw = to_me_hw(dev);
hw->mem_addr = pcim_iomap_table(pdev)[0];
hw->irq = pdev->irq;
+ hw->read_fws = mei_me_read_fws;
pci_enable_msi(pdev);
--
2.21.0
^ permalink raw reply related [flat|nested] 4+ messages in thread
end of thread, other threads:[~2019-11-06 19:53 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2019-11-06 22:38 ` [char-misc-next 1/3] mei: me: mei_me_dev_init() use struct device instead of struct pci_dev Tomas Winkler
2019-11-06 22:38 ` [char-misc-next 2/3] mei: me: store irq number in the hw struct Tomas Winkler
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