adf_drv.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/* Copyright(c) 2025 Intel Corporation */
  3#include <linux/array_size.h>
  4#include <linux/device.h>
  5#include <linux/dma-mapping.h>
  6#include <linux/errno.h>
  7#include <linux/list.h>
  8#include <linux/module.h>
  9#include <linux/pci.h>
 10#include <linux/types.h>
 11
 12#include <adf_accel_devices.h>
 13#include <adf_cfg.h>
 14#include <adf_common_drv.h>
 15#include <adf_dbgfs.h>
 16
 17#include "adf_gen6_shared.h"
 18#include "adf_6xxx_hw_data.h"
 19
 20static int bar_map[] = {
 21	0,	/* SRAM */
 22	2,	/* PMISC */
 23	4,	/* ETR */
 24};
 25
 26static void adf_device_down(void *accel_dev)
 27{
 28	adf_dev_down(accel_dev);
 29}
 30
 31static void adf_dbgfs_cleanup(void *accel_dev)
 32{
 33	adf_dbgfs_exit(accel_dev);
 34}
 35
 36static void adf_cfg_device_remove(void *accel_dev)
 37{
 38	adf_cfg_dev_remove(accel_dev);
 39}
 40
 41static void adf_cleanup_hw_data(void *accel_dev)
 42{
 43	struct adf_accel_dev *accel_device = accel_dev;
 44
 45	if (accel_device->hw_device) {
 46		adf_clean_hw_data_6xxx(accel_device->hw_device);
 47		accel_device->hw_device = NULL;
 48	}
 49}
 50
 51static void adf_devmgr_remove(void *accel_dev)
 52{
 53	adf_devmgr_rm_dev(accel_dev, NULL);
 54}
 55
 56static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 57{
 58	struct adf_accel_pci *accel_pci_dev;
 59	struct adf_hw_device_data *hw_data;
 60	struct device *dev = &pdev->dev;
 61	struct adf_accel_dev *accel_dev;
 62	struct adf_bar *bar;
 63	unsigned int i;
 64	int ret;
 65
 66	if (num_possible_nodes() > 1 && dev_to_node(dev) < 0) {
 67		/*
 68		 * If the accelerator is connected to a node with no memory
 69		 * there is no point in using the accelerator since the remote
 70		 * memory transaction will be very slow.
 71		 */
 72		return dev_err_probe(dev, -EINVAL, "Invalid NUMA configuration.\n");
 73	}
 74
 75	accel_dev = devm_kzalloc(dev, sizeof(*accel_dev), GFP_KERNEL);
 76	if (!accel_dev)
 77		return -ENOMEM;
 78
 79	INIT_LIST_HEAD(&accel_dev->crypto_list);
 80	INIT_LIST_HEAD(&accel_dev->list);
 81	accel_pci_dev = &accel_dev->accel_pci_dev;
 82	accel_pci_dev->pci_dev = pdev;
 83	accel_dev->owner = THIS_MODULE;
 84
 85	hw_data = devm_kzalloc(dev, sizeof(*hw_data), GFP_KERNEL);
 86	if (!hw_data)
 87		return -ENOMEM;
 88
 89	pci_read_config_byte(pdev, PCI_REVISION_ID, &accel_pci_dev->revid);
 90	pci_read_config_dword(pdev, ADF_GEN6_FUSECTL4_OFFSET, &hw_data->fuses[ADF_FUSECTL4]);
 91	pci_read_config_dword(pdev, ADF_GEN6_FUSECTL0_OFFSET, &hw_data->fuses[ADF_FUSECTL0]);
 92	pci_read_config_dword(pdev, ADF_GEN6_FUSECTL1_OFFSET, &hw_data->fuses[ADF_FUSECTL1]);
 93
 94	if (!(hw_data->fuses[ADF_FUSECTL1] & ICP_ACCEL_GEN6_MASK_WCP_WAT_SLICE))
 95		return dev_err_probe(dev, -EFAULT, "Wireless mode is not supported.\n");
 96
 97	/* Enable PCI device */
 98	ret = pcim_enable_device(pdev);
 99	if (ret)
100		return dev_err_probe(dev, ret, "Cannot enable PCI device.\n");
101
102	ret = adf_devmgr_add_dev(accel_dev, NULL);
103	if (ret)
104		return dev_err_probe(dev, ret, "Failed to add new accelerator device.\n");
105
106	ret = devm_add_action_or_reset(dev, adf_devmgr_remove, accel_dev);
107	if (ret)
108		return ret;
109
110	accel_dev->hw_device = hw_data;
111	adf_init_hw_data_6xxx(accel_dev->hw_device);
112
113	ret = devm_add_action_or_reset(dev, adf_cleanup_hw_data, accel_dev);
114	if (ret)
115		return ret;
116
117	/* Get Accelerators and Accelerator Engine masks */
118	hw_data->accel_mask = hw_data->get_accel_mask(hw_data);
119	hw_data->ae_mask = hw_data->get_ae_mask(hw_data);
120	accel_pci_dev->sku = hw_data->get_sku(hw_data);
121
122	/* If the device has no acceleration engines then ignore it */
123	if (!hw_data->accel_mask || !hw_data->ae_mask ||
124	    (~hw_data->ae_mask & ADF_GEN6_ACCELERATORS_MASK)) {
125		ret = -EFAULT;
126		return dev_err_probe(dev, ret, "No acceleration units were found.\n");
127	}
128
129	/* Create device configuration table */
130	ret = adf_cfg_dev_add(accel_dev);
131	if (ret)
132		return ret;
133
134	ret = devm_add_action_or_reset(dev, adf_cfg_device_remove, accel_dev);
135	if (ret)
136		return ret;
137
138	/* Set DMA identifier */
139	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
140	if (ret)
141		return dev_err_probe(dev, ret, "No usable DMA configuration.\n");
142
143	ret = adf_gen6_cfg_dev_init(accel_dev);
144	if (ret)
145		return dev_err_probe(dev, ret, "Failed to initialize configuration.\n");
146
147	/* Get accelerator capability mask */
148	hw_data->accel_capabilities_mask = hw_data->get_accel_cap(accel_dev);
149	if (!hw_data->accel_capabilities_mask) {
150		ret = -EINVAL;
151		return dev_err_probe(dev, ret, "Failed to get capabilities mask.\n");
152	}
153
154	for (i = 0; i < ARRAY_SIZE(bar_map); i++) {
155		bar = &accel_pci_dev->pci_bars[i];
156
157		/* Map 64-bit PCIe BAR */
158		bar->virt_addr = pcim_iomap_region(pdev, bar_map[i], pci_name(pdev));
159		if (IS_ERR(bar->virt_addr)) {
160			ret = PTR_ERR(bar->virt_addr);
161			return dev_err_probe(dev, ret, "Failed to ioremap PCI region.\n");
162		}
163	}
164
165	pci_set_master(pdev);
166
167	/*
168	 * The PCI config space is saved at this point and will be restored
169	 * after a Function Level Reset (FLR) as the FLR does not completely
170	 * restore it.
171	 */
172	ret = pci_save_state(pdev);
173	if (ret)
174		return dev_err_probe(dev, ret, "Failed to save pci state.\n");
175
176	accel_dev->ras_errors.enabled = true;
177
178	adf_dbgfs_init(accel_dev);
179
180	ret = devm_add_action_or_reset(dev, adf_dbgfs_cleanup, accel_dev);
181	if (ret)
182		return ret;
183
184	ret = adf_dev_up(accel_dev, true);
185	if (ret)
186		return ret;
187
188	ret = devm_add_action_or_reset(dev, adf_device_down, accel_dev);
189	if (ret)
190		return ret;
191
192	ret = adf_sysfs_init(accel_dev);
193
194	return ret;
195}
196
197static void adf_shutdown(struct pci_dev *pdev)
198{
199	struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
200
201	adf_dev_down(accel_dev);
202}
203
204static const struct pci_device_id adf_pci_tbl[] = {
205	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_QAT_6XXX) },
206	{ }
207};
208MODULE_DEVICE_TABLE(pci, adf_pci_tbl);
209
210static struct pci_driver adf_driver = {
211	.id_table = adf_pci_tbl,
212	.name = ADF_6XXX_DEVICE_NAME,
213	.probe = adf_probe,
214	.shutdown = adf_shutdown,
215	.sriov_configure = adf_sriov_configure,
216	.err_handler = &adf_err_handler,
217};
218module_pci_driver(adf_driver);
219
220MODULE_LICENSE("GPL");
221MODULE_AUTHOR("Intel");
222MODULE_FIRMWARE(ADF_6XXX_FW);
223MODULE_FIRMWARE(ADF_6XXX_MMP);
224MODULE_DESCRIPTION("Intel(R) QuickAssist Technology for GEN6 Devices");
225MODULE_SOFTDEP("pre: crypto-intel_qat");
226MODULE_IMPORT_NS("CRYPTO_QAT");