Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
net: mana: Add handler for hardware servicing events
To collaborate with hardware servicing events, upon receiving the special
EQE notification from the HW channel, remove the devices on this bus.
Then, after a waiting period based on the device specs, rescan the parent
bus to recover the devices.
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: Shradha Gupta <shradhagupta@linux.microsoft.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/1749834034-18498-1-git-send-email-haiyangz@linux.microsoft.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
authored by
Haiyang Zhang
and committed by
Jakub Kicinski
7768c5f4
7aa3f991
+83
-2
+75
drivers/net/ethernet/microsoft/mana/gdma_main.c
+75
drivers/net/ethernet/microsoft/mana/gdma_main.c
···
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}
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EXPORT_SYMBOL_NS(mana_gd_ring_cq, "NET_MANA");
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#define MANA_SERVICE_PERIOD 10
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struct mana_serv_work {
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struct work_struct serv_work;
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struct pci_dev *pdev;
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};
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static void mana_serv_func(struct work_struct *w)
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{
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struct mana_serv_work *mns_wk;
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struct pci_bus *bus, *parent;
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struct pci_dev *pdev;
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mns_wk = container_of(w, struct mana_serv_work, serv_work);
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pdev = mns_wk->pdev;
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pci_lock_rescan_remove();
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if (!pdev)
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goto out;
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bus = pdev->bus;
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if (!bus) {
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dev_err(&pdev->dev, "MANA service: no bus\n");
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goto out;
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}
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+
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parent = bus->parent;
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if (!parent) {
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dev_err(&pdev->dev, "MANA service: no parent bus\n");
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goto out;
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}
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pci_stop_and_remove_bus_device(bus->self);
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msleep(MANA_SERVICE_PERIOD * 1000);
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pci_rescan_bus(parent);
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out:
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pci_unlock_rescan_remove();
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pci_dev_put(pdev);
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kfree(mns_wk);
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module_put(THIS_MODULE);
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}
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static void mana_gd_process_eqe(struct gdma_queue *eq)
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{
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u32 head = eq->head % (eq->queue_size / GDMA_EQE_SIZE);
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struct gdma_context *gc = eq->gdma_dev->gdma_context;
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struct gdma_eqe *eq_eqe_ptr = eq->queue_mem_ptr;
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struct mana_serv_work *mns_wk;
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union gdma_eqe_info eqe_info;
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enum gdma_eqe_type type;
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struct gdma_event event;
···
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event.type = type;
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memcpy(&event.details, &eqe->details, GDMA_EVENT_DATA_SIZE);
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eq->eq.callback(eq->eq.context, eq, &event);
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break;
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case GDMA_EQE_HWC_FPGA_RECONFIG:
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dev_info(gc->dev, "Recv MANA service type:%d\n", type);
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if (gc->in_service) {
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dev_info(gc->dev, "Already in service\n");
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break;
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}
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if (!try_module_get(THIS_MODULE)) {
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dev_info(gc->dev, "Module is unloading\n");
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break;
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}
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mns_wk = kzalloc(sizeof(*mns_wk), GFP_ATOMIC);
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if (!mns_wk) {
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module_put(THIS_MODULE);
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break;
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}
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dev_info(gc->dev, "Start MANA service type:%d\n", type);
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gc->in_service = true;
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mns_wk->pdev = to_pci_dev(gc->dev);
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pci_dev_get(mns_wk->pdev);
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INIT_WORK(&mns_wk->serv_work, mana_serv_func);
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schedule_work(&mns_wk->serv_work);
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break;
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default:
+8
-2
include/net/mana/gdma.h
+8
-2
include/net/mana/gdma.h
···
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GDMA_EQE_HWC_INIT_EQ_ID_DB = 129,
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GDMA_EQE_HWC_INIT_DATA = 130,
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GDMA_EQE_HWC_INIT_DONE = 131,
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-
GDMA_EQE_HWC_SOC_RECONFIG = 132,
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GDMA_EQE_HWC_FPGA_RECONFIG = 132,
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GDMA_EQE_HWC_SOC_RECONFIG_DATA = 133,
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GDMA_EQE_HWC_SOC_SERVICE = 134,
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GDMA_EQE_RNIC_QP_FATAL = 176,
···
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u32 test_event_eq_id;
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bool is_pf;
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bool in_service;
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+
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phys_addr_t bar0_pa;
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void __iomem *bar0_va;
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void __iomem *shm_base;
···
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/* Driver can handle holes (zeros) in the device list */
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#define GDMA_DRV_CAP_FLAG_1_DEV_LIST_HOLES_SUP BIT(11)
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/* Driver can self reset on FPGA Reconfig EQE notification */
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#define GDMA_DRV_CAP_FLAG_1_HANDLE_RECONFIG_EQE BIT(17)
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+
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#define GDMA_DRV_CAP_FLAGS1 \
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(GDMA_DRV_CAP_FLAG_1_EQ_SHARING_MULTI_VPORT | \
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GDMA_DRV_CAP_FLAG_1_NAPI_WKDONE_FIX | \
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GDMA_DRV_CAP_FLAG_1_HWC_TIMEOUT_RECONFIG | \
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GDMA_DRV_CAP_FLAG_1_VARIABLE_INDIRECTION_TABLE_SUPPORT | \
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-
GDMA_DRV_CAP_FLAG_1_DEV_LIST_HOLES_SUP)
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GDMA_DRV_CAP_FLAG_1_DEV_LIST_HOLES_SUP | \
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GDMA_DRV_CAP_FLAG_1_HANDLE_RECONFIG_EQE)
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#define GDMA_DRV_CAP_FLAGS2 0
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