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authorLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
committerLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
commit5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch)
treecc5c2d0a898769fd59549594fedb3ee6f84e59a0 /drivers/gpu/drm/vmwgfx/vmwgfx_irq.c
downloadlinux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz
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Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted
Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ...
Diffstat (limited to 'drivers/gpu/drm/vmwgfx/vmwgfx_irq.c')
-rw-r--r--drivers/gpu/drm/vmwgfx/vmwgfx_irq.c371
1 files changed, 371 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_irq.c b/drivers/gpu/drm/vmwgfx/vmwgfx_irq.c
new file mode 100644
index 000000000..086e69a13
--- /dev/null
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_irq.c
@@ -0,0 +1,371 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/**************************************************************************
+ *
+ * Copyright 2009-2015 VMware, Inc., Palo Alto, CA., USA
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#include <linux/pci.h>
+#include <linux/sched/signal.h>
+
+#include "vmwgfx_drv.h"
+
+#define VMW_FENCE_WRAP (1 << 24)
+
+static u32 vmw_irqflag_fence_goal(struct vmw_private *vmw)
+{
+ if ((vmw->capabilities2 & SVGA_CAP2_EXTRA_REGS) != 0)
+ return SVGA_IRQFLAG_REG_FENCE_GOAL;
+ else
+ return SVGA_IRQFLAG_FENCE_GOAL;
+}
+
+/**
+ * vmw_thread_fn - Deferred (process context) irq handler
+ *
+ * @irq: irq number
+ * @arg: Closure argument. Pointer to a struct drm_device cast to void *
+ *
+ * This function implements the deferred part of irq processing.
+ * The function is guaranteed to run at least once after the
+ * vmw_irq_handler has returned with IRQ_WAKE_THREAD.
+ *
+ */
+static irqreturn_t vmw_thread_fn(int irq, void *arg)
+{
+ struct drm_device *dev = (struct drm_device *)arg;
+ struct vmw_private *dev_priv = vmw_priv(dev);
+ irqreturn_t ret = IRQ_NONE;
+
+ if (test_and_clear_bit(VMW_IRQTHREAD_FENCE,
+ dev_priv->irqthread_pending)) {
+ vmw_fences_update(dev_priv->fman);
+ wake_up_all(&dev_priv->fence_queue);
+ ret = IRQ_HANDLED;
+ }
+
+ if (test_and_clear_bit(VMW_IRQTHREAD_CMDBUF,
+ dev_priv->irqthread_pending)) {
+ vmw_cmdbuf_irqthread(dev_priv->cman);
+ ret = IRQ_HANDLED;
+ }
+
+ return ret;
+}
+
+/**
+ * vmw_irq_handler: irq handler
+ *
+ * @irq: irq number
+ * @arg: Closure argument. Pointer to a struct drm_device cast to void *
+ *
+ * This function implements the quick part of irq processing.
+ * The function performs fast actions like clearing the device interrupt
+ * flags and also reasonably quick actions like waking processes waiting for
+ * FIFO space. Other IRQ actions are deferred to the IRQ thread.
+ */
+static irqreturn_t vmw_irq_handler(int irq, void *arg)
+{
+ struct drm_device *dev = (struct drm_device *)arg;
+ struct vmw_private *dev_priv = vmw_priv(dev);
+ uint32_t status, masked_status;
+ irqreturn_t ret = IRQ_HANDLED;
+
+ status = vmw_irq_status_read(dev_priv);
+ masked_status = status & READ_ONCE(dev_priv->irq_mask);
+
+ if (likely(status))
+ vmw_irq_status_write(dev_priv, status);
+
+ if (!status)
+ return IRQ_NONE;
+
+ if (masked_status & SVGA_IRQFLAG_FIFO_PROGRESS)
+ wake_up_all(&dev_priv->fifo_queue);
+
+ if ((masked_status & (SVGA_IRQFLAG_ANY_FENCE |
+ vmw_irqflag_fence_goal(dev_priv))) &&
+ !test_and_set_bit(VMW_IRQTHREAD_FENCE, dev_priv->irqthread_pending))
+ ret = IRQ_WAKE_THREAD;
+
+ if ((masked_status & (SVGA_IRQFLAG_COMMAND_BUFFER |
+ SVGA_IRQFLAG_ERROR)) &&
+ !test_and_set_bit(VMW_IRQTHREAD_CMDBUF,
+ dev_priv->irqthread_pending))
+ ret = IRQ_WAKE_THREAD;
+
+ return ret;
+}
+
+static bool vmw_fifo_idle(struct vmw_private *dev_priv, uint32_t seqno)
+{
+
+ return (vmw_read(dev_priv, SVGA_REG_BUSY) == 0);
+}
+
+void vmw_update_seqno(struct vmw_private *dev_priv)
+{
+ uint32_t seqno = vmw_fence_read(dev_priv);
+
+ if (dev_priv->last_read_seqno != seqno) {
+ dev_priv->last_read_seqno = seqno;
+ vmw_fences_update(dev_priv->fman);
+ }
+}
+
+bool vmw_seqno_passed(struct vmw_private *dev_priv,
+ uint32_t seqno)
+{
+ bool ret;
+
+ if (likely(dev_priv->last_read_seqno - seqno < VMW_FENCE_WRAP))
+ return true;
+
+ vmw_update_seqno(dev_priv);
+ if (likely(dev_priv->last_read_seqno - seqno < VMW_FENCE_WRAP))
+ return true;
+
+ if (!vmw_has_fences(dev_priv) && vmw_fifo_idle(dev_priv, seqno))
+ return true;
+
+ /**
+ * Then check if the seqno is higher than what we've actually
+ * emitted. Then the fence is stale and signaled.
+ */
+
+ ret = ((atomic_read(&dev_priv->marker_seq) - seqno)
+ > VMW_FENCE_WRAP);
+
+ return ret;
+}
+
+int vmw_fallback_wait(struct vmw_private *dev_priv,
+ bool lazy,
+ bool fifo_idle,
+ uint32_t seqno,
+ bool interruptible,
+ unsigned long timeout)
+{
+ struct vmw_fifo_state *fifo_state = dev_priv->fifo;
+ bool fifo_down = false;
+
+ uint32_t count = 0;
+ uint32_t signal_seq;
+ int ret;
+ unsigned long end_jiffies = jiffies + timeout;
+ bool (*wait_condition)(struct vmw_private *, uint32_t);
+ DEFINE_WAIT(__wait);
+
+ wait_condition = (fifo_idle) ? &vmw_fifo_idle :
+ &vmw_seqno_passed;
+
+ /**
+ * Block command submission while waiting for idle.
+ */
+
+ if (fifo_idle) {
+ if (dev_priv->cman) {
+ ret = vmw_cmdbuf_idle(dev_priv->cman, interruptible,
+ 10*HZ);
+ if (ret)
+ goto out_err;
+ } else if (fifo_state) {
+ down_read(&fifo_state->rwsem);
+ fifo_down = true;
+ }
+ }
+
+ signal_seq = atomic_read(&dev_priv->marker_seq);
+ ret = 0;
+
+ for (;;) {
+ prepare_to_wait(&dev_priv->fence_queue, &__wait,
+ (interruptible) ?
+ TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE);
+ if (wait_condition(dev_priv, seqno))
+ break;
+ if (time_after_eq(jiffies, end_jiffies)) {
+ DRM_ERROR("SVGA device lockup.\n");
+ break;
+ }
+ if (lazy)
+ schedule_timeout(1);
+ else if ((++count & 0x0F) == 0) {
+ /**
+ * FIXME: Use schedule_hr_timeout here for
+ * newer kernels and lower CPU utilization.
+ */
+
+ __set_current_state(TASK_RUNNING);
+ schedule();
+ __set_current_state((interruptible) ?
+ TASK_INTERRUPTIBLE :
+ TASK_UNINTERRUPTIBLE);
+ }
+ if (interruptible && signal_pending(current)) {
+ ret = -ERESTARTSYS;
+ break;
+ }
+ }
+ finish_wait(&dev_priv->fence_queue, &__wait);
+ if (ret == 0 && fifo_idle && fifo_state)
+ vmw_fence_write(dev_priv, signal_seq);
+
+ wake_up_all(&dev_priv->fence_queue);
+out_err:
+ if (fifo_down)
+ up_read(&fifo_state->rwsem);
+
+ return ret;
+}
+
+void vmw_generic_waiter_add(struct vmw_private *dev_priv,
+ u32 flag, int *waiter_count)
+{
+ spin_lock_bh(&dev_priv->waiter_lock);
+ if ((*waiter_count)++ == 0) {
+ vmw_irq_status_write(dev_priv, flag);
+ dev_priv->irq_mask |= flag;
+ vmw_write(dev_priv, SVGA_REG_IRQMASK, dev_priv->irq_mask);
+ }
+ spin_unlock_bh(&dev_priv->waiter_lock);
+}
+
+void vmw_generic_waiter_remove(struct vmw_private *dev_priv,
+ u32 flag, int *waiter_count)
+{
+ spin_lock_bh(&dev_priv->waiter_lock);
+ if (--(*waiter_count) == 0) {
+ dev_priv->irq_mask &= ~flag;
+ vmw_write(dev_priv, SVGA_REG_IRQMASK, dev_priv->irq_mask);
+ }
+ spin_unlock_bh(&dev_priv->waiter_lock);
+}
+
+void vmw_seqno_waiter_add(struct vmw_private *dev_priv)
+{
+ vmw_generic_waiter_add(dev_priv, SVGA_IRQFLAG_ANY_FENCE,
+ &dev_priv->fence_queue_waiters);
+}
+
+void vmw_seqno_waiter_remove(struct vmw_private *dev_priv)
+{
+ vmw_generic_waiter_remove(dev_priv, SVGA_IRQFLAG_ANY_FENCE,
+ &dev_priv->fence_queue_waiters);
+}
+
+void vmw_goal_waiter_add(struct vmw_private *dev_priv)
+{
+ vmw_generic_waiter_add(dev_priv, vmw_irqflag_fence_goal(dev_priv),
+ &dev_priv->goal_queue_waiters);
+}
+
+void vmw_goal_waiter_remove(struct vmw_private *dev_priv)
+{
+ vmw_generic_waiter_remove(dev_priv, vmw_irqflag_fence_goal(dev_priv),
+ &dev_priv->goal_queue_waiters);
+}
+
+static void vmw_irq_preinstall(struct drm_device *dev)
+{
+ struct vmw_private *dev_priv = vmw_priv(dev);
+ uint32_t status;
+
+ status = vmw_irq_status_read(dev_priv);
+ vmw_irq_status_write(dev_priv, status);
+}
+
+void vmw_irq_uninstall(struct drm_device *dev)
+{
+ struct vmw_private *dev_priv = vmw_priv(dev);
+ struct pci_dev *pdev = to_pci_dev(dev->dev);
+ uint32_t status;
+ u32 i;
+
+ if (!(dev_priv->capabilities & SVGA_CAP_IRQMASK))
+ return;
+
+ vmw_write(dev_priv, SVGA_REG_IRQMASK, 0);
+
+ status = vmw_irq_status_read(dev_priv);
+ vmw_irq_status_write(dev_priv, status);
+
+ for (i = 0; i < dev_priv->num_irq_vectors; ++i)
+ free_irq(dev_priv->irqs[i], dev);
+
+ pci_free_irq_vectors(pdev);
+ dev_priv->num_irq_vectors = 0;
+}
+
+/**
+ * vmw_irq_install - Install the irq handlers
+ *
+ * @dev_priv: Pointer to the vmw_private device.
+ * Return: Zero if successful. Negative number otherwise.
+ */
+int vmw_irq_install(struct vmw_private *dev_priv)
+{
+ struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
+ struct drm_device *dev = &dev_priv->drm;
+ int ret;
+ int nvec;
+ int i = 0;
+
+ BUILD_BUG_ON((SVGA_IRQFLAG_MAX >> VMWGFX_MAX_NUM_IRQS) != 1);
+ BUG_ON(VMWGFX_MAX_NUM_IRQS != get_count_order(SVGA_IRQFLAG_MAX));
+
+ nvec = pci_alloc_irq_vectors(pdev, 1, VMWGFX_MAX_NUM_IRQS,
+ PCI_IRQ_ALL_TYPES);
+
+ if (nvec <= 0) {
+ drm_err(&dev_priv->drm,
+ "IRQ's are unavailable, nvec: %d\n", nvec);
+ ret = nvec;
+ goto done;
+ }
+
+ vmw_irq_preinstall(dev);
+
+ for (i = 0; i < nvec; ++i) {
+ ret = pci_irq_vector(pdev, i);
+ if (ret < 0) {
+ drm_err(&dev_priv->drm,
+ "failed getting irq vector: %d\n", ret);
+ goto done;
+ }
+ dev_priv->irqs[i] = ret;
+
+ ret = request_threaded_irq(dev_priv->irqs[i], vmw_irq_handler, vmw_thread_fn,
+ IRQF_SHARED, VMWGFX_DRIVER_NAME, dev);
+ if (ret != 0) {
+ drm_err(&dev_priv->drm,
+ "Failed installing irq(%d): %d\n",
+ dev_priv->irqs[i], ret);
+ goto done;
+ }
+ }
+
+done:
+ dev_priv->num_irq_vectors = i;
+ return ret;
+}