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From: Dave Jiang <dave.jiang@intel.com>
To: vkoul@kernel.org
Cc: Dan Williams <dan.j.williams@intel.com>, dmaengine@vger.kernel.org
Subject: [PATCH v3 04/18] dmaengine: idxd: remove IDXD_DEV_CONF_READY
Date: Thu, 15 Jul 2021 11:43:26 -0700	[thread overview]
Message-ID: <162637460633.744545.8902095097471365420.stgit@djiang5-desk3.ch.intel.com> (raw)
In-Reply-To: <162637445139.744545.6008938867943724701.stgit@djiang5-desk3.ch.intel.com>

The IDXD_DEV_CONF_READY state flag is no longer needed. The current
implementation uses this flag to stop the device from doing
configuration until the pci driver probe has completed. With the
driver architecture going towards multiple sub-driver attached to
the dsa_bus, this is no longer feasible. The sub-drivers will be
allowed to probe and return with failure when they are not ready
to complete the probe rather than using a state flag to gate the
probing.

There is no expectation that the devices auto-attach to a driver.
Userspace configuration is expected to setup the device before
enabling.

Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
 drivers/dma/idxd/device.c |    4 ++--
 drivers/dma/idxd/idxd.h   |    1 -
 drivers/dma/idxd/init.c   |    2 --
 drivers/dma/idxd/sysfs.c  |   14 --------------
 4 files changed, 2 insertions(+), 19 deletions(-)

diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index c8cf1de72176..4a2af9799239 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -576,7 +576,7 @@ int idxd_device_disable(struct idxd_device *idxd)
 
 	spin_lock_irqsave(&idxd->dev_lock, flags);
 	idxd_device_clear_state(idxd);
-	idxd->state = IDXD_DEV_CONF_READY;
+	idxd->state = IDXD_DEV_DISABLED;
 	spin_unlock_irqrestore(&idxd->dev_lock, flags);
 	return 0;
 }
@@ -588,7 +588,7 @@ void idxd_device_reset(struct idxd_device *idxd)
 	idxd_cmd_exec(idxd, IDXD_CMD_RESET_DEVICE, 0, NULL);
 	spin_lock_irqsave(&idxd->dev_lock, flags);
 	idxd_device_clear_state(idxd);
-	idxd->state = IDXD_DEV_CONF_READY;
+	idxd->state = IDXD_DEV_DISABLED;
 	spin_unlock_irqrestore(&idxd->dev_lock, flags);
 }
 
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index 8e62b647898f..0f0a938854a9 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -210,7 +210,6 @@ struct idxd_hw {
 enum idxd_device_state {
 	IDXD_DEV_HALTED = -1,
 	IDXD_DEV_DISABLED = 0,
-	IDXD_DEV_CONF_READY,
 	IDXD_DEV_ENABLED,
 };
 
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index b4e105917b93..9d62ba7f3bf7 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -682,8 +682,6 @@ static int idxd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		goto err_dev_register;
 	}
 
-	idxd->state = IDXD_DEV_CONF_READY;
-
 	dev_info(&pdev->dev, "Intel(R) Accelerator Device (v%x)\n",
 		 idxd->hw.version);
 
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index be1ee748d754..56f13a71c1cb 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -22,17 +22,9 @@ static int idxd_config_bus_match(struct device *dev,
 	int matched = 0;
 
 	if (is_idxd_dev(dev)) {
-		struct idxd_device *idxd = confdev_to_idxd(dev);
-
-		if (idxd->state != IDXD_DEV_CONF_READY)
-			return 0;
 		matched = 1;
 	} else if (is_idxd_wq_dev(dev)) {
 		struct idxd_wq *wq = confdev_to_wq(dev);
-		struct idxd_device *idxd = wq->idxd;
-
-		if (idxd->state < IDXD_DEV_CONF_READY)
-			return 0;
 
 		if (wq->state != IDXD_WQ_DISABLED) {
 			dev_dbg(dev, "%s not disabled\n", dev_name(dev));
@@ -179,11 +171,6 @@ static int idxd_config_bus_probe(struct device *dev)
 	if (is_idxd_dev(dev)) {
 		struct idxd_device *idxd = confdev_to_idxd(dev);
 
-		if (idxd->state != IDXD_DEV_CONF_READY) {
-			dev_warn(dev, "Device not ready for config\n");
-			return -EBUSY;
-		}
-
 		if (!try_module_get(THIS_MODULE))
 			return -ENXIO;
 
@@ -1430,7 +1417,6 @@ static ssize_t state_show(struct device *dev,
 
 	switch (idxd->state) {
 	case IDXD_DEV_DISABLED:
-	case IDXD_DEV_CONF_READY:
 		return sysfs_emit(buf, "disabled\n");
 	case IDXD_DEV_ENABLED:
 		return sysfs_emit(buf, "enabled\n");



  parent reply	other threads:[~2021-07-15 18:43 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-15 18:43 [PATCH v3 00/18] Fix idxd sub-drivers setup Dave Jiang
2021-07-15 18:43 ` [PATCH v3 01/18] dmaengine: idxd: add driver register helper Dave Jiang
2021-07-15 18:43 ` [PATCH v3 02/18] dmaengine: idxd: add driver name Dave Jiang
2021-07-15 18:43 ` [PATCH v3 03/18] dmaengine: idxd: add 'struct idxd_dev' as wrapper for conf_dev Dave Jiang
2021-07-15 18:43 ` Dave Jiang [this message]
2021-07-15 18:43 ` [PATCH v3 05/18] dmaengine: idxd: move wq_enable() to device.c Dave Jiang
2021-07-15 18:43 ` [PATCH v3 06/18] dmaengine: idxd: move wq_disable() " Dave Jiang
2021-07-15 18:43 ` [PATCH v3 07/18] dmaengine: idxd: remove bus shutdown Dave Jiang
2021-07-15 18:43 ` [PATCH v3 08/18] dmaengine: idxd: remove iax_bus_type prototype Dave Jiang
2021-07-15 18:43 ` [PATCH v3 09/18] dmaengine: idxd: fix bus_probe() and bus_remove() for dsa_bus Dave Jiang
2021-07-15 18:44 ` [PATCH v3 10/18] dmaengine: idxd: move probe() bits for idxd 'struct device' to device.c Dave Jiang
2021-07-15 18:44 ` [PATCH v3 11/18] dmaengine: idxd: idxd: move remove() " Dave Jiang
2021-07-15 18:44 ` [PATCH v3 12/18] dmanegine: idxd: open code the dsa_drv registration Dave Jiang
2021-07-15 18:44 ` [PATCH v3 13/18] dmaengine: idxd: add type to driver in order to allow device matching Dave Jiang
2021-07-15 18:44 ` [PATCH v3 14/18] dmaengine: idxd: create idxd_device sub-driver Dave Jiang
2021-07-15 18:44 ` [PATCH v3 15/18] dmaengine: idxd: create dmaengine driver for wq 'device' Dave Jiang
2021-07-15 18:44 ` [PATCH v3 16/18] dmaengine: idxd: create user " Dave Jiang
2021-07-15 18:44 ` [PATCH v3 17/18] dmaengine: dsa: move dsa_bus_type out of idxd driver to standalone Dave Jiang
2021-07-15 18:44 ` [PATCH v3 18/18] dmaengine: idxd: move dsa_drv support to compatible mode Dave Jiang
2021-07-20 13:49 ` [PATCH v3 00/18] Fix idxd sub-drivers setup Vinod Koul

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