^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * PCI Backend Operations - respond to PCI requests from Frontend
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Author: Ryan Wilson <hap9@epoch.ncsc.mil>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #define dev_fmt pr_fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/moduleparam.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/wait.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/bitops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <xen/events.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "pciback.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static irqreturn_t xen_pcibk_guest_interrupt(int irq, void *dev_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) /* Ensure a device is has the fake IRQ handler "turned on/off" and is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * ready to be exported. This MUST be run after xen_pcibk_reset_device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * which does the actual PCI device enable/disable.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static void xen_pcibk_control_isr(struct pci_dev *dev, int reset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct xen_pcibk_dev_data *dev_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) int enable = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) dev_data = pci_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) if (!dev_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) /* We don't deal with bridges */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) if (dev->hdr_type != PCI_HEADER_TYPE_NORMAL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) if (reset) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) dev_data->enable_intx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) dev_data->ack_intr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) enable = dev_data->enable_intx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) /* Asked to disable, but ISR isn't runnig */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) if (!enable && !dev_data->isr_on)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) /* Squirrel away the IRQs in the dev_data. We need this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * b/c when device transitions to MSI, the dev->irq is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) * overwritten with the MSI vector.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) if (enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) dev_data->irq = dev->irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * SR-IOV devices in all use MSI-X and have no legacy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * interrupts, so inhibit creating a fake IRQ handler for them.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) if (dev_data->irq == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) dev_dbg(&dev->dev, "%s: #%d %s %s%s %s-> %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) dev_data->irq_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) dev_data->irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) pci_is_enabled(dev) ? "on" : "off",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) dev->msi_enabled ? "MSI" : "",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) dev->msix_enabled ? "MSI/X" : "",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) dev_data->isr_on ? "enable" : "disable",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) enable ? "enable" : "disable");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if (enable) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * The MSI or MSI-X should not have an IRQ handler. Otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * if the guest terminates we BUG_ON in free_msi_irqs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (dev->msi_enabled || dev->msix_enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) rc = request_irq(dev_data->irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) xen_pcibk_guest_interrupt, IRQF_SHARED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) dev_data->irq_name, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) dev_err(&dev->dev, "%s: failed to install fake IRQ " \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) "handler for IRQ %d! (rc:%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) dev_data->irq_name, dev_data->irq, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) free_irq(dev_data->irq, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) dev_data->irq = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) dev_data->isr_on = enable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) dev_data->ack_intr = enable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) dev_dbg(&dev->dev, "%s: #%d %s %s%s %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) dev_data->irq_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) dev_data->irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) pci_is_enabled(dev) ? "on" : "off",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) dev->msi_enabled ? "MSI" : "",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) dev->msix_enabled ? "MSI/X" : "",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) enable ? (dev_data->isr_on ? "enabled" : "failed to enable") :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) (dev_data->isr_on ? "failed to disable" : "disabled"));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) /* Ensure a device is "turned off" and ready to be exported.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) * (Also see xen_pcibk_config_reset to ensure virtual configuration space is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * ready to be re-exported)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) void xen_pcibk_reset_device(struct pci_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) u16 cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) xen_pcibk_control_isr(dev, 1 /* reset device */);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) /* Disable devices (but not bridges) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if (dev->hdr_type == PCI_HEADER_TYPE_NORMAL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) #ifdef CONFIG_PCI_MSI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) /* The guest could have been abruptly killed without
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) * disabling MSI/MSI-X interrupts.*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) if (dev->msix_enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) pci_disable_msix(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (dev->msi_enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) pci_disable_msi(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (pci_is_enabled(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) pci_disable_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) dev->is_busmaster = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) pci_read_config_word(dev, PCI_COMMAND, &cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) if (cmd & (PCI_COMMAND_INVALIDATE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) cmd &= ~(PCI_COMMAND_INVALIDATE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) pci_write_config_word(dev, PCI_COMMAND, cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) dev->is_busmaster = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) #ifdef CONFIG_PCI_MSI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) static
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) int xen_pcibk_enable_msi(struct xen_pcibk_device *pdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) struct pci_dev *dev, struct xen_pci_op *op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) struct xen_pcibk_dev_data *dev_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) if (dev->msi_enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) status = -EALREADY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) else if (dev->msix_enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) status = -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) status = pci_enable_msi(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) if (status) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) dev_warn_ratelimited(&dev->dev, "error enabling MSI for guest %u: err %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) pdev->xdev->otherend_id, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) op->value = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) return XEN_PCI_ERR_op_failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) /* The value the guest needs is actually the IDT vector, not the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) * the local domain's IRQ number. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) op->value = dev->irq ? xen_pirq_from_irq(dev->irq) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) dev_dbg(&dev->dev, "MSI: %d\n", op->value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) dev_data = pci_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) if (dev_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) dev_data->ack_intr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) int xen_pcibk_disable_msi(struct xen_pcibk_device *pdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) struct pci_dev *dev, struct xen_pci_op *op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) if (dev->msi_enabled) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) struct xen_pcibk_dev_data *dev_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) pci_disable_msi(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) dev_data = pci_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) if (dev_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) dev_data->ack_intr = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) op->value = dev->irq ? xen_pirq_from_irq(dev->irq) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) dev_dbg(&dev->dev, "MSI: %d\n", op->value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) static
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) int xen_pcibk_enable_msix(struct xen_pcibk_device *pdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) struct pci_dev *dev, struct xen_pci_op *op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) struct xen_pcibk_dev_data *dev_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) int i, result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) struct msix_entry *entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) u16 cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) dev_dbg(&dev->dev, "enable MSI-X\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) if (op->value > SH_INFO_MAX_VEC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) if (dev->msix_enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) return -EALREADY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) * PCI_COMMAND_MEMORY must be enabled, otherwise we may not be able
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) * to access the BARs where the MSI-X entries reside.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) * But VF devices are unique in which the PF needs to be checked.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) pci_read_config_word(pci_physfn(dev), PCI_COMMAND, &cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) if (dev->msi_enabled || !(cmd & PCI_COMMAND_MEMORY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) entries = kmalloc_array(op->value, sizeof(*entries), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (entries == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) for (i = 0; i < op->value; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) entries[i].entry = op->msix_entries[i].entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) entries[i].vector = op->msix_entries[i].vector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) result = pci_enable_msix_exact(dev, entries, op->value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) if (result == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) for (i = 0; i < op->value; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) op->msix_entries[i].entry = entries[i].entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) if (entries[i].vector) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) op->msix_entries[i].vector =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) xen_pirq_from_irq(entries[i].vector);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) dev_dbg(&dev->dev, "MSI-X[%d]: %d\n", i,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) op->msix_entries[i].vector);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) dev_warn_ratelimited(&dev->dev, "error enabling MSI-X for guest %u: err %d!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) pdev->xdev->otherend_id, result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) kfree(entries);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) op->value = result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) dev_data = pci_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) if (dev_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) dev_data->ack_intr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) return result > 0 ? 0 : result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) static
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) int xen_pcibk_disable_msix(struct xen_pcibk_device *pdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) struct pci_dev *dev, struct xen_pci_op *op)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) if (dev->msix_enabled) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) struct xen_pcibk_dev_data *dev_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) pci_disable_msix(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) dev_data = pci_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) if (dev_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) dev_data->ack_intr = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) * SR-IOV devices (which don't have any legacy IRQ) have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) * an undefined IRQ value of zero.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) op->value = dev->irq ? xen_pirq_from_irq(dev->irq) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) dev_dbg(&dev->dev, "MSI-X: %d\n", op->value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) static inline bool xen_pcibk_test_op_pending(struct xen_pcibk_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) return test_bit(_XEN_PCIF_active,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) (unsigned long *)&pdev->sh_info->flags) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) !test_and_set_bit(_PDEVF_op_active, &pdev->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) * Now the same evtchn is used for both pcifront conf_read_write request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) * as well as pcie aer front end ack. We use a new work_queue to schedule
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) * xen_pcibk conf_read_write service for avoiding confict with aer_core
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) * do_recovery job which also use the system default work_queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) static void xen_pcibk_test_and_schedule_op(struct xen_pcibk_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) bool eoi = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) /* Check that frontend is requesting an operation and that we are not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) * already processing a request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) if (xen_pcibk_test_op_pending(pdev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) schedule_work(&pdev->op_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) eoi = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) /*_XEN_PCIB_active should have been cleared by pcifront. And also make
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) sure xen_pcibk is waiting for ack by checking _PCIB_op_pending*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) if (!test_bit(_XEN_PCIB_active, (unsigned long *)&pdev->sh_info->flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) && test_bit(_PCIB_op_pending, &pdev->flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) wake_up(&xen_pcibk_aer_wait_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) eoi = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) /* EOI if there was nothing to do. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) if (eoi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) xen_pcibk_lateeoi(pdev, XEN_EOI_FLAG_SPURIOUS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) /* Performing the configuration space reads/writes must not be done in atomic
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) * context because some of the pci_* functions can sleep (mostly due to ACPI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) * use of semaphores). This function is intended to be called from a work
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) * queue in process context taking a struct xen_pcibk_device as a parameter */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) static void xen_pcibk_do_one_op(struct xen_pcibk_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) struct pci_dev *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) struct xen_pcibk_dev_data *dev_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) struct xen_pci_op *op = &pdev->op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) int test_intx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) #ifdef CONFIG_PCI_MSI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) unsigned int nr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) *op = pdev->sh_info->op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) barrier();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) dev = xen_pcibk_get_pci_dev(pdev, op->domain, op->bus, op->devfn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (dev == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) op->err = XEN_PCI_ERR_dev_not_found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) dev_data = pci_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) if (dev_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) test_intx = dev_data->enable_intx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) switch (op->cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) case XEN_PCI_OP_conf_read:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) op->err = xen_pcibk_config_read(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) op->offset, op->size, &op->value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) case XEN_PCI_OP_conf_write:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) op->err = xen_pcibk_config_write(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) op->offset, op->size, op->value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) #ifdef CONFIG_PCI_MSI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) case XEN_PCI_OP_enable_msi:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) op->err = xen_pcibk_enable_msi(pdev, dev, op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) case XEN_PCI_OP_disable_msi:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) op->err = xen_pcibk_disable_msi(pdev, dev, op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) case XEN_PCI_OP_enable_msix:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) nr = op->value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) op->err = xen_pcibk_enable_msix(pdev, dev, op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) case XEN_PCI_OP_disable_msix:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) op->err = xen_pcibk_disable_msix(pdev, dev, op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) op->err = XEN_PCI_ERR_not_implemented;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) if (!op->err && dev && dev_data) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) /* Transition detected */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) if ((dev_data->enable_intx != test_intx))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) xen_pcibk_control_isr(dev, 0 /* no reset */);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) pdev->sh_info->op.err = op->err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) pdev->sh_info->op.value = op->value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) #ifdef CONFIG_PCI_MSI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) if (op->cmd == XEN_PCI_OP_enable_msix && op->err == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) for (i = 0; i < nr; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) pdev->sh_info->op.msix_entries[i].vector =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) op->msix_entries[i].vector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) /* Tell the driver domain that we're done. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) wmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) clear_bit(_XEN_PCIF_active, (unsigned long *)&pdev->sh_info->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) notify_remote_via_irq(pdev->evtchn_irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) /* Mark that we're done. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) smp_mb__before_atomic(); /* /after/ clearing PCIF_active */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) clear_bit(_PDEVF_op_active, &pdev->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) smp_mb__after_atomic(); /* /before/ final check for work */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) void xen_pcibk_do_op(struct work_struct *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) struct xen_pcibk_device *pdev =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) container_of(data, struct xen_pcibk_device, op_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) xen_pcibk_do_one_op(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) } while (xen_pcibk_test_op_pending(pdev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) xen_pcibk_lateeoi(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) irqreturn_t xen_pcibk_handle_event(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) struct xen_pcibk_device *pdev = dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) bool eoi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) /* IRQs might come in before pdev->evtchn_irq is written. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) if (unlikely(pdev->evtchn_irq != irq))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) pdev->evtchn_irq = irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) eoi = test_and_set_bit(_EOI_pending, &pdev->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) WARN(eoi, "IRQ while EOI pending\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) xen_pcibk_test_and_schedule_op(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) static irqreturn_t xen_pcibk_guest_interrupt(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) struct pci_dev *dev = (struct pci_dev *)dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) struct xen_pcibk_dev_data *dev_data = pci_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) if (dev_data->isr_on && dev_data->ack_intr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) dev_data->handled++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) if ((dev_data->handled % 1000) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) if (xen_test_irq_shared(irq)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) dev_info(&dev->dev, "%s IRQ line is not shared "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) "with other domains. Turning ISR off\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) dev_data->irq_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) dev_data->ack_intr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) return IRQ_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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