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From: Dave Jiang <dave.jiang@intel.com>
To: vkoul@kernel.org, megha.dey@intel.com, maz@kernel.org,
	bhelgaas@google.com, tglx@linutronix.de,
	alex.williamson@redhat.com, jacob.jun.pan@intel.com,
	ashok.raj@intel.com, jgg@mellanox.com, yi.l.liu@intel.com,
	baolu.lu@intel.com, kevin.tian@intel.com,
	sanjay.k.kumar@intel.com, tony.luck@intel.com,
	jing.lin@intel.com, dan.j.williams@intel.com,
	kwankhede@nvidia.com, eric.auger@redhat.com, parav@mellanox.com,
	jgg@mellanox.com, rafael@kernel.org, netanelg@mellanox.com,
	shahafs@mellanox.com, yan.y.zhao@linux.intel.com,
	pbonzini@redhat.com, samuel.ortiz@intel.com,
	mona.hossain@intel.com
Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-pci@vger.kernel.org, kvm@vger.kernel.org
Subject: [PATCH v4 11/17] dmaengine: idxd: prep for virtual device commands
Date: Fri, 30 Oct 2020 11:52:06 -0700	[thread overview]
Message-ID: <160408392598.912050.13058651162025112198.stgit@djiang5-desk3.ch.intel.com> (raw)
In-Reply-To: <160408357912.912050.17005584526266191420.stgit@djiang5-desk3.ch.intel.com>

Update some of the device commands in order to support usage by the virtual
device commands emulated by the vdcm. Expose some of the commands' raw
status so the virtual commands can utilize them accordingly.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
 drivers/dma/idxd/cdev.c   |    2 +
 drivers/dma/idxd/device.c |   69 +++++++++++++++++++++++++++++----------------
 drivers/dma/idxd/idxd.h   |    8 +++--
 drivers/dma/idxd/irq.c    |    2 +
 drivers/dma/idxd/mdev.c   |    2 +
 drivers/dma/idxd/sysfs.c  |    8 +++--
 6 files changed, 56 insertions(+), 35 deletions(-)

diff --git a/drivers/dma/idxd/cdev.c b/drivers/dma/idxd/cdev.c
index b774bf336347..1f504d1f0c42 100644
--- a/drivers/dma/idxd/cdev.c
+++ b/drivers/dma/idxd/cdev.c
@@ -159,7 +159,7 @@ static int idxd_cdev_release(struct inode *node, struct file *filep)
 			if (rc < 0)
 				dev_err(dev, "wq disable pasid failed.\n");
 		} else {
-			idxd_wq_drain(wq);
+			idxd_wq_drain(wq, NULL);
 		}
 	}
 
diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index 8aff07b1acb4..52fc8e64c5fc 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -197,22 +197,25 @@ void idxd_wq_free_resources(struct idxd_wq *wq)
 	sbitmap_queue_free(&wq->sbq);
 }
 
-int idxd_wq_enable(struct idxd_wq *wq)
+int idxd_wq_enable(struct idxd_wq *wq, u32 *status)
 {
 	struct idxd_device *idxd = wq->idxd;
 	struct device *dev = &idxd->pdev->dev;
-	u32 status;
+	u32 stat;
 
 	if (wq->state == IDXD_WQ_ENABLED) {
 		dev_dbg(dev, "WQ %d already enabled\n", wq->id);
 		return -ENXIO;
 	}
 
-	idxd_cmd_exec(idxd, IDXD_CMD_ENABLE_WQ, wq->id, &status);
+	idxd_cmd_exec(idxd, IDXD_CMD_ENABLE_WQ, wq->id, &stat);
 
-	if (status != IDXD_CMDSTS_SUCCESS &&
-	    status != IDXD_CMDSTS_ERR_WQ_ENABLED) {
-		dev_dbg(dev, "WQ enable failed: %#x\n", status);
+	if (status)
+		*status = stat;
+
+	if (stat != IDXD_CMDSTS_SUCCESS &&
+	    stat != IDXD_CMDSTS_ERR_WQ_ENABLED) {
+		dev_dbg(dev, "WQ enable failed: %#x\n", stat);
 		return -ENXIO;
 	}
 
@@ -221,11 +224,11 @@ int idxd_wq_enable(struct idxd_wq *wq)
 	return 0;
 }
 
-int idxd_wq_disable(struct idxd_wq *wq)
+int idxd_wq_disable(struct idxd_wq *wq, u32 *status)
 {
 	struct idxd_device *idxd = wq->idxd;
 	struct device *dev = &idxd->pdev->dev;
-	u32 status, operand;
+	u32 stat, operand;
 
 	dev_dbg(dev, "Disabling WQ %d\n", wq->id);
 
@@ -235,10 +238,13 @@ int idxd_wq_disable(struct idxd_wq *wq)
 	}
 
 	operand = BIT(wq->id % 16) | ((wq->id / 16) << 16);
-	idxd_cmd_exec(idxd, IDXD_CMD_DISABLE_WQ, operand, &status);
+	idxd_cmd_exec(idxd, IDXD_CMD_DISABLE_WQ, operand, &stat);
+
+	if (status)
+		*status = stat;
 
-	if (status != IDXD_CMDSTS_SUCCESS) {
-		dev_dbg(dev, "WQ disable failed: %#x\n", status);
+	if (stat != IDXD_CMDSTS_SUCCESS) {
+		dev_dbg(dev, "WQ disable failed: %#x\n", stat);
 		return -ENXIO;
 	}
 
@@ -247,20 +253,31 @@ int idxd_wq_disable(struct idxd_wq *wq)
 	return 0;
 }
 
-void idxd_wq_drain(struct idxd_wq *wq)
+int idxd_wq_drain(struct idxd_wq *wq, u32 *status)
 {
 	struct idxd_device *idxd = wq->idxd;
 	struct device *dev = &idxd->pdev->dev;
-	u32 operand;
+	u32 operand, stat;
 
 	if (wq->state != IDXD_WQ_ENABLED) {
 		dev_dbg(dev, "WQ %d in wrong state: %d\n", wq->id, wq->state);
-		return;
+		return 0;
 	}
 
 	dev_dbg(dev, "Draining WQ %d\n", wq->id);
 	operand = BIT(wq->id % 16) | ((wq->id / 16) << 16);
-	idxd_cmd_exec(idxd, IDXD_CMD_DRAIN_WQ, operand, NULL);
+	idxd_cmd_exec(idxd, IDXD_CMD_DRAIN_WQ, operand, &stat);
+
+	if (status)
+		*status = stat;
+
+	if (stat != IDXD_CMDSTS_SUCCESS) {
+		dev_dbg(dev, "WQ drain failed: %#x\n", stat);
+		return -ENXIO;
+	}
+
+	dev_dbg(dev, "WQ %d drained\n", wq->id);
+	return 0;
 }
 
 int idxd_wq_map_portal(struct idxd_wq *wq)
@@ -287,11 +304,11 @@ void idxd_wq_unmap_portal(struct idxd_wq *wq)
 	devm_iounmap(dev, wq->portal);
 }
 
-int idxd_wq_abort(struct idxd_wq *wq)
+int idxd_wq_abort(struct idxd_wq *wq, u32 *status)
 {
 	struct idxd_device *idxd = wq->idxd;
 	struct device *dev = &idxd->pdev->dev;
-	u32 operand, status;
+	u32 operand, stat;
 
 	dev_dbg(dev, "Abort WQ %d\n", wq->id);
 	if (wq->state != IDXD_WQ_ENABLED) {
@@ -301,9 +318,13 @@ int idxd_wq_abort(struct idxd_wq *wq)
 
 	operand = BIT(wq->id % 16) | ((wq->id / 16) << 16);
 	dev_dbg(dev, "cmd: %u operand: %#x\n", IDXD_CMD_ABORT_WQ, operand);
-	idxd_cmd_exec(idxd, IDXD_CMD_ABORT_WQ, operand, &status);
-	if (status != IDXD_CMDSTS_SUCCESS) {
-		dev_dbg(dev, "WQ abort failed: %#x\n", status);
+	idxd_cmd_exec(idxd, IDXD_CMD_ABORT_WQ, operand, &stat);
+
+	if (status)
+		*status = stat;
+
+	if (stat != IDXD_CMDSTS_SUCCESS) {
+		dev_dbg(dev, "WQ abort failed: %#x\n", stat);
 		return -ENXIO;
 	}
 
@@ -319,7 +340,7 @@ int idxd_wq_set_pasid(struct idxd_wq *wq, int pasid)
 	unsigned int offset;
 	unsigned long flags;
 
-	rc = idxd_wq_disable(wq);
+	rc = idxd_wq_disable(wq, NULL);
 	if (rc < 0)
 		return rc;
 
@@ -331,7 +352,7 @@ int idxd_wq_set_pasid(struct idxd_wq *wq, int pasid)
 	iowrite32(wqcfg.bits[WQCFG_PASID_IDX], idxd->reg_base + offset);
 	spin_unlock_irqrestore(&idxd->dev_lock, flags);
 
-	rc = idxd_wq_enable(wq);
+	rc = idxd_wq_enable(wq, NULL);
 	if (rc < 0)
 		return rc;
 
@@ -346,7 +367,7 @@ int idxd_wq_disable_pasid(struct idxd_wq *wq)
 	unsigned int offset;
 	unsigned long flags;
 
-	rc = idxd_wq_disable(wq);
+	rc = idxd_wq_disable(wq, NULL);
 	if (rc < 0)
 		return rc;
 
@@ -358,7 +379,7 @@ int idxd_wq_disable_pasid(struct idxd_wq *wq)
 	iowrite32(wqcfg.bits[WQCFG_PASID_IDX], idxd->reg_base + offset);
 	spin_unlock_irqrestore(&idxd->dev_lock, flags);
 
-	rc = idxd_wq_enable(wq);
+	rc = idxd_wq_enable(wq, NULL);
 	if (rc < 0)
 		return rc;
 
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index ab28a1bffb7c..e616d18b53c0 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -350,15 +350,15 @@ int idxd_device_release_int_handle(struct idxd_device *idxd, int handle,
 /* work queue control */
 int idxd_wq_alloc_resources(struct idxd_wq *wq);
 void idxd_wq_free_resources(struct idxd_wq *wq);
-int idxd_wq_enable(struct idxd_wq *wq);
-int idxd_wq_disable(struct idxd_wq *wq);
-void idxd_wq_drain(struct idxd_wq *wq);
+int idxd_wq_enable(struct idxd_wq *wq, u32 *status);
+int idxd_wq_disable(struct idxd_wq *wq, u32 *status);
+int idxd_wq_drain(struct idxd_wq *wq, u32 *status);
 int idxd_wq_map_portal(struct idxd_wq *wq);
 void idxd_wq_unmap_portal(struct idxd_wq *wq);
 void idxd_wq_disable_cleanup(struct idxd_wq *wq);
 int idxd_wq_set_pasid(struct idxd_wq *wq, int pasid);
 int idxd_wq_disable_pasid(struct idxd_wq *wq);
-int idxd_wq_abort(struct idxd_wq *wq);
+int idxd_wq_abort(struct idxd_wq *wq, u32 *status);
 void idxd_wq_setup_pasid(struct idxd_wq *wq, int pasid);
 void idxd_wq_setup_priv(struct idxd_wq *wq, int priv);
 
diff --git a/drivers/dma/idxd/irq.c b/drivers/dma/idxd/irq.c
index 593a2f6ed16c..a94fce00767b 100644
--- a/drivers/dma/idxd/irq.c
+++ b/drivers/dma/idxd/irq.c
@@ -48,7 +48,7 @@ static void idxd_device_reinit(struct work_struct *work)
 		struct idxd_wq *wq = &idxd->wqs[i];
 
 		if (wq->state == IDXD_WQ_ENABLED) {
-			rc = idxd_wq_enable(wq);
+			rc = idxd_wq_enable(wq, NULL);
 			if (rc < 0) {
 				dev_warn(dev, "Unable to re-enable wq %s\n",
 					 dev_name(&wq->conf_dev));
diff --git a/drivers/dma/idxd/mdev.c b/drivers/dma/idxd/mdev.c
index 3b6febe22a0e..91270121dfbc 100644
--- a/drivers/dma/idxd/mdev.c
+++ b/drivers/dma/idxd/mdev.c
@@ -85,7 +85,7 @@ static void idxd_vdcm_init(struct vdcm_idxd *vidxd)
 	vidxd_mmio_init(vidxd);
 
 	if (wq_dedicated(wq) && wq->state == IDXD_WQ_ENABLED)
-		idxd_wq_disable(wq);
+		idxd_wq_disable(wq, NULL);
 }
 
 static void idxd_vdcm_release(struct mdev_device *mdev)
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index 17f13ebae028..fe5f95509c5c 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -218,7 +218,7 @@ static int idxd_config_bus_probe(struct device *dev)
 			return rc;
 		}
 
-		rc = idxd_wq_enable(wq);
+		rc = idxd_wq_enable(wq, NULL);
 		if (rc < 0) {
 			mutex_unlock(&wq->wq_lock);
 			dev_warn(dev, "WQ %d enabling failed: %d\n",
@@ -229,7 +229,7 @@ static int idxd_config_bus_probe(struct device *dev)
 		rc = idxd_wq_map_portal(wq);
 		if (rc < 0) {
 			dev_warn(dev, "wq portal mapping failed: %d\n", rc);
-			rc = idxd_wq_disable(wq);
+			rc = idxd_wq_disable(wq, NULL);
 			if (rc < 0)
 				dev_warn(dev, "IDXD wq disable failed\n");
 			mutex_unlock(&wq->wq_lock);
@@ -287,8 +287,8 @@ static void disable_wq(struct idxd_wq *wq)
 
 	idxd_wq_unmap_portal(wq);
 
-	idxd_wq_drain(wq);
-	rc = idxd_wq_disable(wq);
+	idxd_wq_drain(wq, NULL);
+	rc = idxd_wq_disable(wq, NULL);
 
 	idxd_wq_free_resources(wq);
 	wq->client_count = 0;



  parent reply	other threads:[~2020-10-30 18:52 UTC|newest]

Thread overview: 123+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-30 18:50 [PATCH v4 00/17] Add VFIO mediated device support and DEV-MSI support for the idxd driver Dave Jiang
2020-10-30 18:50 ` [PATCH v4 01/17] irqchip: Add IMS (Interrupt Message Store) driver Dave Jiang
2020-10-30 22:01   ` Thomas Gleixner
2020-10-30 18:51 ` [PATCH v4 02/17] iommu/vt-d: Add DEV-MSI support Dave Jiang
2020-10-30 20:31   ` Thomas Gleixner
2020-10-30 20:52     ` Dave Jiang
2020-10-30 18:51 ` [PATCH v4 03/17] dmaengine: idxd: add theory of operation documentation for idxd mdev Dave Jiang
2020-10-30 18:51 ` [PATCH v4 04/17] dmaengine: idxd: add support for readonly config devices Dave Jiang
2020-10-30 18:51 ` [PATCH v4 05/17] dmaengine: idxd: add interrupt handle request support Dave Jiang
2020-10-30 18:51 ` [PATCH v4 06/17] PCI: add SIOV and IMS capability detection Dave Jiang
2020-10-30 19:51   ` Bjorn Helgaas
2020-10-30 21:20     ` Dave Jiang
2020-10-30 21:50       ` Bjorn Helgaas
2020-10-30 22:45       ` Jason Gunthorpe
2020-10-30 22:49         ` Dave Jiang
2020-11-02 13:21           ` Jason Gunthorpe
2020-11-03  2:49             ` Tian, Kevin
2020-11-03 12:43               ` Jason Gunthorpe
2020-11-04  3:41                 ` Tian, Kevin
2020-11-04 12:40                   ` Jason Gunthorpe
2020-11-04 13:34                     ` Tian, Kevin
2020-11-04 13:54                       ` Jason Gunthorpe
2020-11-06  9:48                         ` Tian, Kevin
2020-11-06 13:14                           ` Jason Gunthorpe
2020-11-06 16:48                             ` Raj, Ashok
2020-11-06 17:51                               ` Jason Gunthorpe
2020-11-06 23:47                                 ` Dan Williams
2020-11-07  0:12                                   ` Jason Gunthorpe
2020-11-07  1:42                                     ` Dan Williams
2020-11-08 18:11                                     ` Raj, Ashok
2020-11-08 18:34                                       ` David Woodhouse
2020-11-08 23:25                                         ` Raj, Ashok
2020-11-10 14:19                                           ` Raj, Ashok
2020-11-10 14:41                                             ` David Woodhouse
2020-11-08 23:41                                       ` Jason Gunthorpe
2020-11-09  0:05                                         ` Raj, Ashok
2020-11-08 18:47                                     ` Thomas Gleixner
2020-11-08 19:36                                       ` David Woodhouse
2020-11-08 22:47                                         ` Thomas Gleixner
2020-11-08 23:29                                           ` Jason Gunthorpe
2020-11-11 15:41                                         ` Christoph Hellwig
2020-11-11 16:09                                           ` Raj, Ashok
2020-11-11 22:27                                             ` Thomas Gleixner
2020-11-11 23:03                                               ` Raj, Ashok
2020-11-12  1:13                                                 ` Thomas Gleixner
2020-11-12 13:10                                                 ` Jason Gunthorpe
2020-11-08 23:23                                       ` Jason Gunthorpe
2020-11-08 23:36                                         ` Raj, Ashok
2020-11-09  7:37                                         ` Tian, Kevin
2020-11-09 16:46                                           ` Jason Gunthorpe
2020-11-08 23:58                                       ` Raj, Ashok
2020-11-09  7:59                                         ` Tian, Kevin
2020-11-09 11:21                                         ` Thomas Gleixner
2020-11-09 17:30                                           ` Jason Gunthorpe
2020-11-09 22:40                                             ` Raj, Ashok
2020-11-09 22:42                                             ` Thomas Gleixner
2020-11-10  5:14                                               ` Raj, Ashok
2020-11-10 10:27                                                 ` Thomas Gleixner
2020-11-10 14:13                                                   ` Raj, Ashok
2020-11-10 14:23                                                     ` Jason Gunthorpe
2020-11-11  2:17                                                       ` Tian, Kevin
2020-11-12 13:46                                                         ` Jason Gunthorpe
2020-11-11  7:14                                                     ` Tian, Kevin
2020-11-12 19:32                                                       ` Konrad Rzeszutek Wilk
2020-11-12 22:42                                                         ` Thomas Gleixner
2020-11-13  2:42                                                           ` Tian, Kevin
2020-11-13 12:57                                                             ` Jason Gunthorpe
2020-11-13 13:32                                                             ` Thomas Gleixner
2020-11-13 16:12                                                               ` Luck, Tony
2020-11-13 17:38                                                                 ` Raj, Ashok
2020-11-14 10:34                                                           ` Christoph Hellwig
2020-11-14 21:18                                                             ` Raj, Ashok
2020-11-15 11:26                                                               ` Thomas Gleixner
2020-11-15 19:31                                                                 ` Raj, Ashok
2020-11-15 22:11                                                                   ` Thomas Gleixner
2020-11-16  0:22                                                                     ` Raj, Ashok
2020-11-16  7:31                                                                       ` Tian, Kevin
2020-11-16 15:46                                                                         ` Jason Gunthorpe
2020-11-16 17:56                                                                           ` Thomas Gleixner
2020-11-16 18:02                                                                             ` Jason Gunthorpe
2020-11-16 20:37                                                                               ` Thomas Gleixner
2020-11-16 23:51                                                                               ` Tian, Kevin
2020-11-17  9:21                                                                                 ` Thomas Gleixner
2020-11-16  8:25                                                               ` Christoph Hellwig
2020-11-10 14:19                                                 ` Jason Gunthorpe
2020-11-11  2:35                                                   ` Tian, Kevin
2020-11-08 21:18                             ` Thomas Gleixner
2020-11-08 22:09                               ` David Woodhouse
2020-11-08 22:52                                 ` Thomas Gleixner
2020-11-07  0:32                           ` Thomas Gleixner
2020-11-09  5:25                             ` Tian, Kevin
2020-10-30 18:51 ` [PATCH v4 07/17] dmaengine: idxd: add IMS support in base driver Dave Jiang
2020-10-30 18:51 ` [PATCH v4 08/17] dmaengine: idxd: add device support functions in prep for mdev Dave Jiang
2020-10-30 18:51 ` [PATCH v4 09/17] dmaengine: idxd: add basic mdev registration and helper functions Dave Jiang
2020-10-30 18:51 ` [PATCH v4 10/17] dmaengine: idxd: add emulation rw routines Dave Jiang
2020-10-30 18:52 ` Dave Jiang [this message]
2020-10-30 18:52 ` [PATCH v4 12/17] dmaengine: idxd: virtual device commands emulation Dave Jiang
2020-10-30 18:52 ` [PATCH v4 13/17] dmaengine: idxd: ims setup for the vdcm Dave Jiang
2020-10-30 21:26   ` Thomas Gleixner
2020-10-30 18:52 ` [PATCH v4 14/17] dmaengine: idxd: add mdev type as a new wq type Dave Jiang
2020-10-30 18:52 ` [PATCH v4 15/17] dmaengine: idxd: add dedicated wq mdev type Dave Jiang
2020-10-30 18:52 ` [PATCH v4 16/17] dmaengine: idxd: add new wq state for mdev Dave Jiang
2020-10-30 18:52 ` [PATCH v4 17/17] dmaengine: idxd: add error notification from host driver to mediated device Dave Jiang
2020-10-30 18:58 ` [PATCH v4 00/17] Add VFIO mediated device support and DEV-MSI support for the idxd driver Jason Gunthorpe
2020-10-30 19:13   ` Dave Jiang
2020-10-30 19:17     ` Jason Gunthorpe
2020-10-30 19:23       ` Raj, Ashok
2020-10-30 19:30         ` Jason Gunthorpe
2020-10-30 20:43           ` Raj, Ashok
2020-10-30 22:54             ` Jason Gunthorpe
2020-10-31  2:50             ` Thomas Gleixner
2020-10-31 23:53               ` Raj, Ashok
2020-11-02 13:20                 ` Jason Gunthorpe
2020-11-02 16:20                   ` Raj, Ashok
2020-11-02 17:19                     ` Jason Gunthorpe
2020-11-02 18:18                       ` Dave Jiang
2020-11-02 18:26                         ` Jason Gunthorpe
2020-11-02 18:38                           ` Dan Williams
2020-11-02 18:51                             ` Jason Gunthorpe
2020-11-02 19:26                               ` Dan Williams
2020-10-30 20:48 ` Thomas Gleixner
2020-10-30 20:59   ` Dave Jiang
2020-10-30 22:10     ` Thomas Gleixner

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