diff mbox series

[v9,2/2] i2c: designware: Add doorbell support for Mendocino

Message ID 20230414144008.836-3-mario.limonciello@amd.com (mailing list archive)
State Accepted
Delegated to: Herbert Xu
Headers show
Series Use CCP driver to handle PSP I2C arbitration | expand

Commit Message

Mario Limonciello April 14, 2023, 2:40 p.m. UTC
Mendocino and later platform don't use the platform feature mailbox for
communication for I2C arbitration, they rely upon ringing a doorbell.

Detect the platform by the device ID of the root port and choose the
appropriate method.

Link: https://lore.kernel.org/linux-i2c/20220916131854.687371-3-jsd@semihalf.com/
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Reviewed-by: Mark Hasemeyer <markhas@chromium.org>
Tested-by: Mark Hasemeyer <markhas@chromium.org>
Acked-by: Wolfram Sang <wsa@kernel.org>
---
v8->v9:
 * Add tag

 drivers/i2c/busses/Kconfig                 |  1 +
 drivers/i2c/busses/i2c-designware-amdpsp.c | 26 +++++++++++++++++++++-
 2 files changed, 26 insertions(+), 1 deletion(-)

Comments

kernel test robot April 14, 2023, 4:50 p.m. UTC | #1
Hi Mario,

kernel test robot noticed the following build errors:

[auto build test ERROR on next-20230413]
[cannot apply to wsa/i2c/for-next linus/master v6.3-rc6 v6.3-rc5 v6.3-rc4 v6.3-rc6]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Mario-Limonciello/i2c-designware-Use-PCI-PSP-driver-for-communication/20230414-224238
patch link:    https://lore.kernel.org/r/20230414144008.836-3-mario.limonciello%40amd.com
patch subject: [PATCH v9 2/2] i2c: designware: Add doorbell support for Mendocino
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20230415/202304150012.IieZ4vzl-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/a8ae7845f0c3fcb46f4c37508838fed08dae7eec
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Mario-Limonciello/i2c-designware-Use-PCI-PSP-driver-for-communication/20230414-224238
        git checkout a8ae7845f0c3fcb46f4c37508838fed08dae7eec
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/i2c/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304150012.IieZ4vzl-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/i2c/busses/i2c-designware-amdpsp.c: In function 'psp_send_i2c_req_doorbell':
>> drivers/i2c/busses/i2c-designware-amdpsp.c:82:15: error: too many arguments to function 'psp_ring_platform_doorbell'
      82 |         ret = psp_ring_platform_doorbell(req->type, &req->hdr.status);
         |               ^~~~~~~~~~~~~~~~~~~~~~~~~~
   In file included from drivers/i2c/busses/i2c-designware-amdpsp.c:5:
   include/linux/psp-platform-access.h:51:5: note: declared here
      51 | int psp_ring_platform_doorbell(int msg);
         |     ^~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/psp_ring_platform_doorbell +82 drivers/i2c/busses/i2c-designware-amdpsp.c

    77	
    78	static int psp_send_i2c_req_doorbell(struct psp_i2c_req *req)
    79	{
    80		int ret;
    81	
  > 82		ret = psp_ring_platform_doorbell(req->type, &req->hdr.status);
    83		if (ret == -EIO)
    84			return check_i2c_req_sts(req);
    85	
    86		return ret;
    87	}
    88
Mario Limonciello April 14, 2023, 5:01 p.m. UTC | #2
[Public]



> -----Original Message-----
> From: kernel test robot <lkp@intel.com>
> Sent: Friday, April 14, 2023 11:50
> To: Limonciello, Mario <Mario.Limonciello@amd.com>; Herbert Xu
> <herbert@gondor.apana.org.au>; Jarkko Nikula
> <jarkko.nikula@linux.intel.com>; Andy Shevchenko
> <andriy.shevchenko@linux.intel.com>; Mika Westerberg
> <mika.westerberg@linux.intel.com>; Jan Dabros <jsd@semihalf.com>
> Cc: oe-kbuild-all@lists.linux.dev; linux-crypto@vger.kernel.org; Limonciello,
> Mario <Mario.Limonciello@amd.com>; Mark Hasemeyer
> <markhas@chromium.org>; Wolfram Sang <wsa-dev@sang-
> engineering.com>; linux-i2c@vger.kernel.org; linux-kernel@vger.kernel.org
> Subject: Re: [PATCH v9 2/2] i2c: designware: Add doorbell support for
> Mendocino
> 
> Hi Mario,
> 
> kernel test robot noticed the following build errors:
> 
> [auto build test ERROR on next-20230413]
> [cannot apply to wsa/i2c/for-next linus/master v6.3-rc6 v6.3-rc5 v6.3-rc4
> v6.3-rc6]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch#_base_tree_information]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Mario-Limonciello/i2c-
> designware-Use-PCI-PSP-driver-for-communication/20230414-224238
> patch link:    https://lore.kernel.org/r/20230414144008.836-3-
> mario.limonciello%40amd.com
> patch subject: [PATCH v9 2/2] i2c: designware: Add doorbell support for
> Mendocino
> config: x86_64-allyesconfig (https://download.01.org/0day-
> ci/archive/20230415/202304150012.IieZ4vzl-lkp@intel.com/config)
> compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
> reproduce (this is a W=1 build):
>         # https://github.com/intel-lab-
> lkp/linux/commit/a8ae7845f0c3fcb46f4c37508838fed08dae7eec
>         git remote add linux-review https://github.com/intel-lab-lkp/linux
>         git fetch --no-tags linux-review Mario-Limonciello/i2c-designware-Use-
> PCI-PSP-driver-for-communication/20230414-224238
>         git checkout a8ae7845f0c3fcb46f4c37508838fed08dae7eec
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         make W=1 O=build_dir ARCH=x86_64 olddefconfig
>         make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/i2c/
> 
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <lkp@intel.com>
> | Link: https://lore.kernel.org/oe-kbuild-all/202304150012.IieZ4vzl-
> lkp@intel.com/
> 
> All errors (new ones prefixed by >>):
> 
>    drivers/i2c/busses/i2c-designware-amdpsp.c: In function
> 'psp_send_i2c_req_doorbell':
> >> drivers/i2c/busses/i2c-designware-amdpsp.c:82:15: error: too many
> arguments to function 'psp_ring_platform_doorbell'
>       82 |         ret = psp_ring_platform_doorbell(req->type, &req->hdr.status);
>          |               ^~~~~~~~~~~~~~~~~~~~~~~~~~
>    In file included from drivers/i2c/busses/i2c-designware-amdpsp.c:5:
>    include/linux/psp-platform-access.h:51:5: note: declared here
>       51 | int psp_ring_platform_doorbell(int msg);
>          |     ^~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> 
> vim +/psp_ring_platform_doorbell +82 drivers/i2c/busses/i2c-designware-
> amdpsp.c
> 
>     77
>     78	static int psp_send_i2c_req_doorbell(struct psp_i2c_req *req)
>     79	{
>     80		int ret;
>     81
>   > 82		ret = psp_ring_platform_doorbell(req->type, &req-
> >hdr.status);
>     83		if (ret == -EIO)
>     84			return check_i2c_req_sts(req);
>     85
>     86		return ret;
>     87	}
>     88
> 
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests

FYI - this failure is because it was tested across wrong tree.  I didn't use
a base commit so it guessed.

Thanks,
diff mbox series

Patch

diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index 89f8b75043d0..4b4323bbf268 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -568,6 +568,7 @@  config I2C_DESIGNWARE_AMDPSP
 	bool "AMD PSP I2C semaphore support"
 	depends on ACPI
 	depends on CRYPTO_DEV_SP_PSP
+	depends on PCI
 	depends on I2C_DESIGNWARE_PLATFORM
 	depends on (I2C_DESIGNWARE_PLATFORM=y && CRYPTO_DEV_CCP_DD=y) || \
 		   (I2C_DESIGNWARE_PLATFORM=m && CRYPTO_DEV_CCP_DD)
diff --git a/drivers/i2c/busses/i2c-designware-amdpsp.c b/drivers/i2c/busses/i2c-designware-amdpsp.c
index 12870dc44bdb..63454b06e5da 100644
--- a/drivers/i2c/busses/i2c-designware-amdpsp.c
+++ b/drivers/i2c/busses/i2c-designware-amdpsp.c
@@ -1,6 +1,7 @@ 
 // SPDX-License-Identifier: GPL-2.0
 
 #include <linux/i2c.h>
+#include <linux/pci.h>
 #include <linux/psp-platform-access.h>
 #include <linux/psp.h>
 #include <linux/workqueue.h>
@@ -32,6 +33,8 @@  static u32 psp_i2c_access_count;
 static bool psp_i2c_mbox_fail;
 static struct device *psp_i2c_dev;
 
+static int (*_psp_send_i2c_req)(struct psp_i2c_req *req);
+
 /* Helper to verify status returned by PSP */
 static int check_i2c_req_sts(struct psp_i2c_req *req)
 {
@@ -72,6 +75,17 @@  static int psp_send_i2c_req_cezanne(struct psp_i2c_req *req)
 	return ret;
 }
 
+static int psp_send_i2c_req_doorbell(struct psp_i2c_req *req)
+{
+	int ret;
+
+	ret = psp_ring_platform_doorbell(req->type, &req->hdr.status);
+	if (ret == -EIO)
+		return check_i2c_req_sts(req);
+
+	return ret;
+}
+
 static int psp_send_i2c_req(enum psp_i2c_req_type i2c_req_type)
 {
 	struct psp_i2c_req *req;
@@ -87,7 +101,7 @@  static int psp_send_i2c_req(enum psp_i2c_req_type i2c_req_type)
 	req->type = i2c_req_type;
 
 	start = jiffies;
-	ret = read_poll_timeout(psp_send_i2c_req_cezanne, status,
+	ret = read_poll_timeout(_psp_send_i2c_req, status,
 				(status != -EBUSY),
 				PSP_I2C_REQ_RETRY_DELAY_US,
 				PSP_I2C_REQ_RETRY_CNT * PSP_I2C_REQ_RETRY_DELAY_US,
@@ -262,6 +276,8 @@  static const struct i2c_lock_operations i2c_dw_psp_lock_ops = {
 
 int i2c_dw_amdpsp_probe_lock_support(struct dw_i2c_dev *dev)
 {
+	struct pci_dev *rdev;
+
 	if (!IS_REACHABLE(CONFIG_CRYPTO_DEV_CCP_DD))
 		return -ENODEV;
 
@@ -275,6 +291,14 @@  int i2c_dw_amdpsp_probe_lock_support(struct dw_i2c_dev *dev)
 	if (psp_i2c_dev)
 		return -EEXIST;
 
+	/* Cezanne uses platform mailbox, Mendocino and later use doorbell */
+	rdev = pci_get_domain_bus_and_slot(0, 0, PCI_DEVFN(0, 0));
+	if (rdev->device == 0x1630)
+		_psp_send_i2c_req = psp_send_i2c_req_cezanne;
+	else
+		_psp_send_i2c_req = psp_send_i2c_req_doorbell;
+	pci_dev_put(rdev);
+
 	if (psp_check_platform_access_status())
 		return -EPROBE_DEFER;