From: Dave Jiang <dave.jiang@intel.com>
To: vkoul@kernel.org, megha.dey@linux.intel.com, maz@kernel.org,
bhelgaas@google.com, rafael@kernel.org,
gregkh@linuxfoundation.org, tglx@linutronix.de, hpa@zytor.com,
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
Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org,
x86@kernel.org, linux-pci@vger.kernel.org, kvm@vger.kernel.org
Subject: [PATCH RFC 12/15] dmaengine: idxd: add device support functions in prep for mdev
Date: Tue, 21 Apr 2020 16:35:02 -0700 [thread overview]
Message-ID: <158751210234.36773.5978383376123318481.stgit@djiang5-desk3.ch.intel.com> (raw)
In-Reply-To: <158751095889.36773.6009825070990637468.stgit@djiang5-desk3.ch.intel.com>
Add some device support helper functions that will be used by VFIO mediated
device in preparation of adding VFIO mdev support.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
drivers/dma/idxd/device.c | 130 +++++++++++++++++++++++++++++++++++++++++++++
drivers/dma/idxd/idxd.h | 7 ++
drivers/dma/idxd/init.c | 19 +++++++
3 files changed, 156 insertions(+)
diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index a46b6558984c..830aa5859646 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -319,6 +319,40 @@ void idxd_wq_unmap_portal(struct idxd_wq *wq)
devm_iounmap(dev, wq->portal);
}
+int idxd_wq_abort(struct idxd_wq *wq)
+{
+ int rc;
+ struct idxd_device *idxd = wq->idxd;
+ struct device *dev = &idxd->pdev->dev;
+ u32 operand, status;
+
+ lockdep_assert_held(&idxd->dev_lock);
+
+ dev_dbg(dev, "Abort WQ %d\n", wq->id);
+ if (wq->state != IDXD_WQ_ENABLED) {
+ dev_dbg(dev, "WQ %d not active\n", wq->id);
+ return -ENXIO;
+ }
+
+ operand = BIT(wq->id % 16) | ((wq->id / 16) << 16);
+ dev_dbg(dev, "cmd: %u operand: %#x\n", IDXD_CMD_ABORT_WQ, operand);
+ rc = idxd_cmd_send(idxd, IDXD_CMD_ABORT_WQ, operand);
+ if (rc < 0)
+ return rc;
+
+ rc = idxd_cmd_wait(idxd, &status, IDXD_DRAIN_TIMEOUT);
+ if (rc < 0)
+ return rc;
+
+ if (status != IDXD_CMDSTS_SUCCESS) {
+ dev_dbg(dev, "WQ abort failed: %#x\n", status);
+ return -ENXIO;
+ }
+
+ dev_dbg(dev, "WQ %d aborted\n", wq->id);
+ return 0;
+}
+
int idxd_wq_set_pasid(struct idxd_wq *wq, int pasid)
{
struct idxd_device *idxd = wq->idxd;
@@ -372,6 +406,66 @@ int idxd_wq_disable_pasid(struct idxd_wq *wq)
return 0;
}
+void idxd_wq_update_pasid(struct idxd_wq *wq, int pasid)
+{
+ struct idxd_device *idxd = wq->idxd;
+ int offset;
+
+ lockdep_assert_held(&idxd->dev_lock);
+
+ /* PASID fields are 8 bytes into the WQCFG register */
+ offset = idxd->wqcfg_offset + wq->id * 32 + 8;
+ wq->wqcfg.pasid = pasid;
+ iowrite32(wq->wqcfg.bits[2], idxd->reg_base + offset);
+}
+
+void idxd_wq_update_priv(struct idxd_wq *wq, int priv)
+{
+ struct idxd_device *idxd = wq->idxd;
+ int offset;
+
+ lockdep_assert_held(&idxd->dev_lock);
+
+ /* priv field is 8 bytes into the WQCFG register */
+ offset = idxd->wqcfg_offset + wq->id * 32 + 8;
+ wq->wqcfg.priv = !!priv;
+ iowrite32(wq->wqcfg.bits[2], idxd->reg_base + offset);
+}
+
+int idxd_wq_drain(struct idxd_wq *wq)
+{
+ int rc;
+ struct idxd_device *idxd = wq->idxd;
+ struct device *dev = &idxd->pdev->dev;
+ u32 operand, status;
+
+ lockdep_assert_held(&idxd->dev_lock);
+
+ dev_dbg(dev, "Drain WQ %d\n", wq->id);
+ if (wq->state != IDXD_WQ_ENABLED) {
+ dev_dbg(dev, "WQ %d not active\n", wq->id);
+ return -ENXIO;
+ }
+
+ operand = BIT(wq->id % 16) | ((wq->id / 16) << 16);
+ dev_dbg(dev, "cmd: %u operand: %#x\n", IDXD_CMD_DRAIN_WQ, operand);
+ rc = idxd_cmd_send(idxd, IDXD_CMD_DRAIN_WQ, operand);
+ if (rc < 0)
+ return rc;
+
+ rc = idxd_cmd_wait(idxd, &status, IDXD_DRAIN_TIMEOUT);
+ if (rc < 0)
+ return rc;
+
+ if (status != IDXD_CMDSTS_SUCCESS) {
+ dev_dbg(dev, "WQ drain failed: %#x\n", status);
+ return -ENXIO;
+ }
+
+ dev_dbg(dev, "WQ %d drained\n", wq->id);
+ return 0;
+}
+
/* Device control bits */
static inline bool idxd_is_enabled(struct idxd_device *idxd)
{
@@ -542,6 +636,42 @@ int idxd_device_drain_pasid(struct idxd_device *idxd, int pasid)
return 0;
}
+int idxd_device_request_int_handle(struct idxd_device *idxd, int idx,
+ int *handle)
+{
+ int rc;
+ struct device *dev = &idxd->pdev->dev;
+ u32 operand, status;
+
+ lockdep_assert_held(&idxd->dev_lock);
+
+ if (!idxd->hw.gen_cap.int_handle_req)
+ return -EOPNOTSUPP;
+
+ dev_dbg(dev, "get int handle, idx %d\n", idx);
+
+ operand = idx & 0xffff;
+ dev_dbg(dev, "cmd: %u operand: %#x\n",
+ IDXD_CMD_REQUEST_INT_HANDLE, operand);
+ rc = idxd_cmd_send(idxd, IDXD_CMD_REQUEST_INT_HANDLE, operand);
+ if (rc < 0)
+ return rc;
+
+ rc = idxd_cmd_wait(idxd, &status, IDXD_REG_TIMEOUT);
+ if (rc < 0)
+ return rc;
+
+ if (status != IDXD_CMDSTS_SUCCESS) {
+ dev_dbg(dev, "request int handle failed: %#x\n", status);
+ return -ENXIO;
+ }
+
+ *handle = (status >> 8) & 0xffff;
+
+ dev_dbg(dev, "int handle acquired: %u\n", *handle);
+ return 0;
+}
+
/* Device configuration bits */
static void idxd_group_config_write(struct idxd_group *group)
{
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index 3a942e9c5980..9b56a4c7f3fc 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -199,6 +199,7 @@ struct idxd_device {
atomic_t num_allocated_ims;
struct sbitmap ims_sbmap;
+ int *int_handles;
};
/* IDXD software descriptor */
@@ -303,6 +304,8 @@ int idxd_device_ro_config(struct idxd_device *idxd);
void idxd_device_wqs_clear_state(struct idxd_device *idxd);
int idxd_device_drain_pasid(struct idxd_device *idxd, int pasid);
void idxd_device_load_config(struct idxd_device *idxd);
+int idxd_device_request_int_handle(struct idxd_device *idxd,
+ int idx, int *handle);
/* work queue control */
int idxd_wq_alloc_resources(struct idxd_wq *wq);
@@ -313,6 +316,10 @@ int idxd_wq_map_portal(struct idxd_wq *wq);
void idxd_wq_unmap_portal(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);
+void idxd_wq_update_pasid(struct idxd_wq *wq, int pasid);
+void idxd_wq_update_priv(struct idxd_wq *wq, int priv);
+int idxd_wq_drain(struct idxd_wq *wq);
/* submission */
int idxd_submit_desc(struct idxd_wq *wq, struct idxd_desc *desc,
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index 15b3ef73cac3..babe6e614087 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -56,6 +56,7 @@ static int idxd_setup_interrupts(struct idxd_device *idxd)
int i, msixcnt;
int rc = 0;
union msix_perm mperm;
+ unsigned long flags;
msixcnt = pci_msix_vec_count(pdev);
if (msixcnt < 0) {
@@ -130,6 +131,17 @@ static int idxd_setup_interrupts(struct idxd_device *idxd)
}
dev_dbg(dev, "Allocated idxd-msix %d for vector %d\n",
i, msix->vector);
+
+ if (idxd->hw.gen_cap.int_handle_req) {
+ spin_lock_irqsave(&idxd->dev_lock, flags);
+ rc = idxd_device_request_int_handle(idxd, i,
+ &idxd->int_handles[i]);
+ spin_unlock_irqrestore(&idxd->dev_lock, flags);
+ if (rc < 0)
+ goto err_no_irq;
+ dev_dbg(dev, "int handle requested: %u\n",
+ idxd->int_handles[i]);
+ }
}
idxd_unmask_error_interrupts(idxd);
@@ -168,6 +180,13 @@ static int idxd_setup_internals(struct idxd_device *idxd)
struct device *dev = &idxd->pdev->dev;
int i;
+ if (idxd->hw.gen_cap.int_handle_req) {
+ idxd->int_handles = devm_kcalloc(dev, idxd->max_wqs,
+ sizeof(int), GFP_KERNEL);
+ if (!idxd->int_handles)
+ return -ENOMEM;
+ }
+
idxd->groups = devm_kcalloc(dev, idxd->max_groups,
sizeof(struct idxd_group), GFP_KERNEL);
if (!idxd->groups)
next prev parent reply other threads:[~2020-04-21 23:35 UTC|newest]
Thread overview: 89+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-21 23:33 [PATCH RFC 00/15] Add VFIO mediated device support and IMS support for the idxd driver Dave Jiang
2020-04-21 23:33 ` [PATCH RFC 01/15] drivers/base: Introduce platform_msi_ops Dave Jiang
2020-04-26 7:01 ` Greg KH
2020-04-27 21:38 ` Dave Jiang
2020-04-28 7:34 ` Greg KH
2020-04-21 23:33 ` [PATCH RFC 02/15] drivers/base: Introduce a new platform-msi list Dave Jiang
2020-04-25 21:13 ` Thomas Gleixner
2020-05-04 0:08 ` Dey, Megha
2020-04-21 23:34 ` [PATCH RFC 03/15] drivers/base: Allocate/free platform-msi interrupts by group Dave Jiang
2020-04-25 21:23 ` Thomas Gleixner
2020-05-04 0:08 ` Dey, Megha
2020-04-21 23:34 ` [PATCH RFC 04/15] drivers/base: Add support for a new IMS irq domain Dave Jiang
2020-04-23 20:11 ` Jason Gunthorpe
2020-05-01 22:30 ` Dey, Megha
2020-05-03 22:25 ` Jason Gunthorpe
2020-05-03 22:40 ` Dey, Megha
2020-05-03 22:46 ` Jason Gunthorpe
2020-05-04 0:25 ` Dey, Megha
2020-05-04 12:14 ` Jason Gunthorpe
2020-05-06 10:27 ` Tian, Kevin
2020-04-25 21:38 ` Thomas Gleixner
2020-05-04 0:11 ` Dey, Megha
2020-04-21 23:34 ` [PATCH RFC 05/15] ims-msi: Add mask/unmask routines Dave Jiang
2020-04-25 21:49 ` Thomas Gleixner
2020-05-04 0:16 ` Dey, Megha
2020-04-21 23:34 ` [PATCH RFC 06/15] ims-msi: Enable IMS interrupts Dave Jiang
2020-04-25 22:13 ` Thomas Gleixner
2020-05-04 0:17 ` Dey, Megha
2020-04-21 23:34 ` [PATCH RFC 07/15] Documentation: Interrupt Message store Dave Jiang
2020-04-23 20:04 ` Jason Gunthorpe
2020-05-01 22:32 ` Dey, Megha
2020-05-03 22:28 ` Jason Gunthorpe
2020-05-03 22:41 ` Dey, Megha
2020-04-21 23:34 ` [PATCH RFC 08/15] vfio/mdev: Add a member for iommu domain in mdev_device Dave Jiang
2020-04-21 23:34 ` [PATCH RFC 09/15] vfio/type1: Save domain when attach domain to mdev Dave Jiang
2020-04-21 23:34 ` [PATCH RFC 10/15] dmaengine: idxd: add config support for readonly devices Dave Jiang
2020-04-21 23:34 ` [PATCH RFC 11/15] dmaengine: idxd: add IMS support in base driver Dave Jiang
2020-04-21 23:35 ` Dave Jiang [this message]
2020-04-21 23:35 ` [PATCH RFC 13/15] dmaengine: idxd: add support for VFIO mediated device Dave Jiang
2020-04-21 23:35 ` [PATCH RFC 14/15] dmaengine: idxd: add error notification from host driver to " Dave Jiang
2020-04-21 23:35 ` [PATCH RFC 15/15] dmaengine: idxd: add ABI documentation for mediated device support Dave Jiang
2020-04-21 23:54 ` [PATCH RFC 00/15] Add VFIO mediated device support and IMS support for the idxd driver Jason Gunthorpe
2020-04-22 0:53 ` Tian, Kevin
2020-04-22 11:50 ` Jason Gunthorpe
2020-04-22 21:14 ` Raj, Ashok
2020-04-23 19:12 ` Jason Gunthorpe
2020-04-24 3:27 ` Tian, Kevin
2020-04-24 12:44 ` Jason Gunthorpe
2020-04-24 16:25 ` Tian, Kevin
2020-04-24 18:12 ` Jason Gunthorpe
2020-04-26 5:18 ` Tian, Kevin
2020-04-26 19:13 ` Jason Gunthorpe
2020-04-27 3:43 ` Alex Williamson
2020-04-27 11:58 ` Jason Gunthorpe
2020-04-27 13:19 ` Alex Williamson
2020-04-27 13:22 ` Jason Gunthorpe
2020-04-27 14:18 ` Alex Williamson
2020-04-27 14:25 ` Jason Gunthorpe
2020-04-27 15:41 ` Alex Williamson
2020-04-27 16:16 ` Jason Gunthorpe
2020-04-27 16:25 ` Dave Jiang
2020-04-27 21:56 ` Jason Gunthorpe
2020-04-29 9:42 ` Tian, Kevin
2020-05-08 20:47 ` Raj, Ashok
2020-05-08 23:16 ` Jason Gunthorpe
2020-05-08 23:52 ` Dave Jiang
2020-05-09 0:09 ` Raj, Ashok
2020-05-09 12:21 ` Jason Gunthorpe
2020-05-13 2:29 ` Jason Wang
2020-05-13 8:30 ` Tian, Kevin
2020-05-13 12:40 ` Jason Gunthorpe
2020-04-27 12:13 ` Tian, Kevin
2020-04-27 12:55 ` Jason Gunthorpe
2020-04-22 21:24 ` Dan Williams
2020-04-23 19:17 ` Dan Williams
2020-04-23 19:49 ` Jason Gunthorpe
2020-05-01 22:31 ` Dey, Megha
2020-05-03 22:21 ` Jason Gunthorpe
2020-05-03 22:32 ` Dey, Megha
2020-04-23 19:18 ` Jason Gunthorpe
2020-05-01 22:31 ` Dey, Megha
2020-05-03 22:22 ` Jason Gunthorpe
2020-05-03 22:31 ` Dey, Megha
2020-05-03 22:36 ` Jason Gunthorpe
2020-05-04 0:20 ` Dey, Megha
2020-04-22 23:04 ` Dey, Megha
2020-04-23 19:44 ` Jason Gunthorpe
2020-05-01 22:32 ` Dey, Megha
2020-04-24 6:31 ` Jason Wang
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