1 // SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
2 /* Copyright(c) 2014 - 2020 Intel Corporation */
3 #include <linux/kernel.h>
4 #include <linux/init.h>
5 #include <linux/types.h>
7 #include <linux/slab.h>
8 #include <linux/errno.h>
9 #include <linux/interrupt.h>
10 #include "adf_accel_devices.h"
11 #include "adf_common_drv.h"
13 #include "adf_cfg_strings.h"
14 #include "adf_cfg_common.h"
15 #include "adf_transport_access_macros.h"
16 #include "adf_transport_internal.h"
18 static int adf_enable_msix(struct adf_accel_dev *accel_dev)
20 struct adf_accel_pci *pci_dev_info = &accel_dev->accel_pci_dev;
21 struct adf_hw_device_data *hw_data = accel_dev->hw_device;
22 u32 msix_num_entries = 1;
24 if (hw_data->set_msix_rttable)
25 hw_data->set_msix_rttable(accel_dev);
27 /* If SR-IOV is disabled, add entries for each bank */
28 if (!accel_dev->pf.vf_info) {
31 msix_num_entries += hw_data->num_banks;
32 for (i = 0; i < msix_num_entries; i++)
33 pci_dev_info->msix_entries.entries[i].entry = i;
35 pci_dev_info->msix_entries.entries[0].entry =
39 if (pci_enable_msix_exact(pci_dev_info->pci_dev,
40 pci_dev_info->msix_entries.entries,
42 dev_err(&GET_DEV(accel_dev), "Failed to enable MSI-X IRQ(s)\n");
48 static void adf_disable_msix(struct adf_accel_pci *pci_dev_info)
50 pci_disable_msix(pci_dev_info->pci_dev);
53 static irqreturn_t adf_msix_isr_bundle(int irq, void *bank_ptr)
55 struct adf_etr_bank_data *bank = bank_ptr;
56 struct adf_hw_csr_ops *csr_ops = GET_CSR_OPS(bank->accel_dev);
58 csr_ops->write_csr_int_flag_and_col(bank->csr_addr, bank->bank_number,
60 tasklet_hi_schedule(&bank->resp_handler);
64 static irqreturn_t adf_msix_isr_ae(int irq, void *dev_ptr)
66 struct adf_accel_dev *accel_dev = dev_ptr;
69 /* If SR-IOV is enabled (vf_info is non-NULL), check for VF->PF ints */
70 if (accel_dev->pf.vf_info) {
71 struct adf_hw_device_data *hw_data = accel_dev->hw_device;
72 struct adf_bar *pmisc =
73 &GET_BARS(accel_dev)[hw_data->get_misc_bar_id(hw_data)];
74 void __iomem *pmisc_bar_addr = pmisc->virt_addr;
77 /* Get the interrupt sources triggered by VFs */
78 vf_mask = ((ADF_CSR_RD(pmisc_bar_addr, ADF_ERRSOU5) &
80 ((ADF_CSR_RD(pmisc_bar_addr, ADF_ERRSOU3) &
84 struct adf_accel_vf_info *vf_info;
85 bool irq_handled = false;
88 /* Disable VF2PF interrupts for VFs with pending ints */
89 adf_disable_vf2pf_interrupts(accel_dev, vf_mask);
92 * Schedule tasklets to handle VF2PF interrupt BHs
93 * unless the VF is malicious and is attempting to
94 * flood the host OS with VF2PF interrupts.
96 for_each_set_bit(i, (const unsigned long *)&vf_mask,
97 (sizeof(vf_mask) * BITS_PER_BYTE)) {
98 vf_info = accel_dev->pf.vf_info + i;
100 if (!__ratelimit(&vf_info->vf2pf_ratelimit)) {
101 dev_info(&GET_DEV(accel_dev),
102 "Too many ints from VF%d\n",
107 /* Tasklet will re-enable ints from this VF */
108 tasklet_hi_schedule(&vf_info->vf2pf_bh_tasklet);
116 #endif /* CONFIG_PCI_IOV */
118 dev_dbg(&GET_DEV(accel_dev), "qat_dev%d spurious AE interrupt\n",
119 accel_dev->accel_id);
124 static int adf_request_irqs(struct adf_accel_dev *accel_dev)
126 struct adf_accel_pci *pci_dev_info = &accel_dev->accel_pci_dev;
127 struct adf_hw_device_data *hw_data = accel_dev->hw_device;
128 struct msix_entry *msixe = pci_dev_info->msix_entries.entries;
129 struct adf_etr_data *etr_data = accel_dev->transport;
133 /* Request msix irq for all banks unless SR-IOV enabled */
134 if (!accel_dev->pf.vf_info) {
135 for (i = 0; i < hw_data->num_banks; i++) {
136 struct adf_etr_bank_data *bank = &etr_data->banks[i];
137 unsigned int cpu, cpus = num_online_cpus();
139 name = *(pci_dev_info->msix_entries.names + i);
140 snprintf(name, ADF_MAX_MSIX_VECTOR_NAME,
141 "qat%d-bundle%d", accel_dev->accel_id, i);
142 ret = request_irq(msixe[i].vector,
143 adf_msix_isr_bundle, 0, name, bank);
145 dev_err(&GET_DEV(accel_dev),
146 "failed to enable irq %d for %s\n",
147 msixe[i].vector, name);
151 cpu = ((accel_dev->accel_id * hw_data->num_banks) +
153 irq_set_affinity_hint(msixe[i].vector,
158 /* Request msix irq for AE */
159 name = *(pci_dev_info->msix_entries.names + i);
160 snprintf(name, ADF_MAX_MSIX_VECTOR_NAME,
161 "qat%d-ae-cluster", accel_dev->accel_id);
162 ret = request_irq(msixe[i].vector, adf_msix_isr_ae, 0, name, accel_dev);
164 dev_err(&GET_DEV(accel_dev),
165 "failed to enable irq %d, for %s\n",
166 msixe[i].vector, name);
172 static void adf_free_irqs(struct adf_accel_dev *accel_dev)
174 struct adf_accel_pci *pci_dev_info = &accel_dev->accel_pci_dev;
175 struct adf_hw_device_data *hw_data = accel_dev->hw_device;
176 struct msix_entry *msixe = pci_dev_info->msix_entries.entries;
177 struct adf_etr_data *etr_data = accel_dev->transport;
180 if (pci_dev_info->msix_entries.num_entries > 1) {
181 for (i = 0; i < hw_data->num_banks; i++) {
182 irq_set_affinity_hint(msixe[i].vector, NULL);
183 free_irq(msixe[i].vector, &etr_data->banks[i]);
186 irq_set_affinity_hint(msixe[i].vector, NULL);
187 free_irq(msixe[i].vector, accel_dev);
190 static int adf_isr_alloc_msix_entry_table(struct adf_accel_dev *accel_dev)
194 struct msix_entry *entries;
195 struct adf_hw_device_data *hw_data = accel_dev->hw_device;
196 u32 msix_num_entries = 1;
198 /* If SR-IOV is disabled (vf_info is NULL), add entries for each bank */
199 if (!accel_dev->pf.vf_info)
200 msix_num_entries += hw_data->num_banks;
202 entries = kcalloc_node(msix_num_entries, sizeof(*entries),
203 GFP_KERNEL, dev_to_node(&GET_DEV(accel_dev)));
207 names = kcalloc(msix_num_entries, sizeof(char *), GFP_KERNEL);
212 for (i = 0; i < msix_num_entries; i++) {
213 *(names + i) = kzalloc(ADF_MAX_MSIX_VECTOR_NAME, GFP_KERNEL);
217 accel_dev->accel_pci_dev.msix_entries.num_entries = msix_num_entries;
218 accel_dev->accel_pci_dev.msix_entries.entries = entries;
219 accel_dev->accel_pci_dev.msix_entries.names = names;
222 for (i = 0; i < msix_num_entries; i++)
229 static void adf_isr_free_msix_entry_table(struct adf_accel_dev *accel_dev)
231 char **names = accel_dev->accel_pci_dev.msix_entries.names;
234 kfree(accel_dev->accel_pci_dev.msix_entries.entries);
235 for (i = 0; i < accel_dev->accel_pci_dev.msix_entries.num_entries; i++)
240 static int adf_setup_bh(struct adf_accel_dev *accel_dev)
242 struct adf_etr_data *priv_data = accel_dev->transport;
243 struct adf_hw_device_data *hw_data = accel_dev->hw_device;
246 for (i = 0; i < hw_data->num_banks; i++)
247 tasklet_init(&priv_data->banks[i].resp_handler,
248 adf_response_handler,
249 (unsigned long)&priv_data->banks[i]);
253 static void adf_cleanup_bh(struct adf_accel_dev *accel_dev)
255 struct adf_etr_data *priv_data = accel_dev->transport;
256 struct adf_hw_device_data *hw_data = accel_dev->hw_device;
259 for (i = 0; i < hw_data->num_banks; i++) {
260 tasklet_disable(&priv_data->banks[i].resp_handler);
261 tasklet_kill(&priv_data->banks[i].resp_handler);
266 * adf_isr_resource_free() - Free IRQ for acceleration device
267 * @accel_dev: Pointer to acceleration device.
269 * Function frees interrupts for acceleration device.
271 void adf_isr_resource_free(struct adf_accel_dev *accel_dev)
273 adf_free_irqs(accel_dev);
274 adf_cleanup_bh(accel_dev);
275 adf_disable_msix(&accel_dev->accel_pci_dev);
276 adf_isr_free_msix_entry_table(accel_dev);
278 EXPORT_SYMBOL_GPL(adf_isr_resource_free);
281 * adf_isr_resource_alloc() - Allocate IRQ for acceleration device
282 * @accel_dev: Pointer to acceleration device.
284 * Function allocates interrupts for acceleration device.
286 * Return: 0 on success, error code otherwise.
288 int adf_isr_resource_alloc(struct adf_accel_dev *accel_dev)
292 ret = adf_isr_alloc_msix_entry_table(accel_dev);
296 ret = adf_enable_msix(accel_dev);
298 goto err_free_msix_table;
300 ret = adf_setup_bh(accel_dev);
302 goto err_disable_msix;
304 ret = adf_request_irqs(accel_dev);
311 adf_cleanup_bh(accel_dev);
314 adf_disable_msix(&accel_dev->accel_pci_dev);
317 adf_isr_free_msix_entry_table(accel_dev);
322 EXPORT_SYMBOL_GPL(adf_isr_resource_alloc);