adf_drv.c

  1// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
  2/* Copyright(c) 2020 Intel Corporation */
  3#include <linux/device.h>
  4#include <linux/module.h>
  5#include <linux/pci.h>
  6
  7#include <adf_accel_devices.h>
  8#include <adf_cfg.h>
  9#include <adf_common_drv.h>
 10#include <adf_dbgfs.h>
 11#include <adf_gen4_config.h>
 12#include <adf_gen4_hw_data.h>
 13
 14#include "adf_4xxx_hw_data.h"
 15
 16static const struct pci_device_id adf_pci_tbl[] = {
 17	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_QAT_4XXX) },
 18	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_QAT_401XX) },
 19	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_QAT_402XX) },
 20	{ }
 21};
 22MODULE_DEVICE_TABLE(pci, adf_pci_tbl);
 23
 24static void adf_cleanup_accel(struct adf_accel_dev *accel_dev)
 25{
 26	if (accel_dev->hw_device) {
 27		adf_clean_hw_data_4xxx(accel_dev->hw_device);
 28		accel_dev->hw_device = NULL;
 29	}
 30	adf_dbgfs_exit(accel_dev);
 31	adf_cfg_dev_remove(accel_dev);
 32	adf_devmgr_rm_dev(accel_dev, NULL);
 33}
 34
 35static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 36{
 37	struct adf_accel_dev *accel_dev;
 38	struct adf_accel_pci *accel_pci_dev;
 39	struct adf_hw_device_data *hw_data;
 40	unsigned int i, bar_nr;
 41	unsigned long bar_mask;
 42	struct adf_bar *bar;
 43	int ret;
 44
 45	if (num_possible_nodes() > 1 && dev_to_node(&pdev->dev) < 0) {
 46		/*
 47		 * If the accelerator is connected to a node with no memory
 48		 * there is no point in using the accelerator since the remote
 49		 * memory transaction will be very slow.
 50		 */
 51		dev_err(&pdev->dev, "Invalid NUMA configuration.\n");
 52		return -EINVAL;
 53	}
 54
 55	accel_dev = devm_kzalloc(&pdev->dev, sizeof(*accel_dev), GFP_KERNEL);
 56	if (!accel_dev)
 57		return -ENOMEM;
 58
 59	INIT_LIST_HEAD(&accel_dev->crypto_list);
 60	accel_pci_dev = &accel_dev->accel_pci_dev;
 61	accel_pci_dev->pci_dev = pdev;
 62
 63	/*
 64	 * Add accel device to accel table
 65	 * This should be called before adf_cleanup_accel is called
 66	 */
 67	if (adf_devmgr_add_dev(accel_dev, NULL)) {
 68		dev_err(&pdev->dev, "Failed to add new accelerator device.\n");
 69		return -EFAULT;
 70	}
 71
 72	accel_dev->owner = THIS_MODULE;
 73	/* Allocate and initialise device hardware meta-data structure */
 74	hw_data = devm_kzalloc(&pdev->dev, sizeof(*hw_data), GFP_KERNEL);
 75	if (!hw_data) {
 76		ret = -ENOMEM;
 77		goto out_err;
 78	}
 79
 80	accel_dev->hw_device = hw_data;
 81	adf_init_hw_data_4xxx(accel_dev->hw_device, ent->device);
 82
 83	pci_read_config_byte(pdev, PCI_REVISION_ID, &accel_pci_dev->revid);
 84	pci_read_config_dword(pdev, ADF_GEN4_FUSECTL4_OFFSET, &hw_data->fuses[ADF_FUSECTL4]);
 85
 86	/* Get Accelerators and Accelerators Engines masks */
 87	hw_data->accel_mask = hw_data->get_accel_mask(hw_data);
 88	hw_data->ae_mask = hw_data->get_ae_mask(hw_data);
 89	accel_pci_dev->sku = hw_data->get_sku(hw_data);
 90	/* If the device has no acceleration engines then ignore it */
 91	if (!hw_data->accel_mask || !hw_data->ae_mask ||
 92	    (~hw_data->ae_mask & 0x01)) {
 93		dev_err(&pdev->dev, "No acceleration units found.\n");
 94		ret = -EFAULT;
 95		goto out_err;
 96	}
 97
 98	/* Create device configuration table */
 99	ret = adf_cfg_dev_add(accel_dev);
100	if (ret)
101		goto out_err;
102
103	/* Enable PCI device */
104	ret = pcim_enable_device(pdev);
105	if (ret) {
106		dev_err(&pdev->dev, "Can't enable PCI device.\n");
107		goto out_err;
108	}
109
110	/* Set DMA identifier */
111	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
112	if (ret) {
113		dev_err(&pdev->dev, "No usable DMA configuration.\n");
114		goto out_err;
115	}
116
117	ret = adf_gen4_cfg_dev_init(accel_dev);
118	if (ret) {
119		dev_err(&pdev->dev, "Failed to initialize configuration.\n");
120		goto out_err;
121	}
122
123	/* Get accelerator capabilities mask */
124	hw_data->accel_capabilities_mask = hw_data->get_accel_cap(accel_dev);
125	if (!hw_data->accel_capabilities_mask) {
126		dev_err(&pdev->dev, "Failed to get capabilities mask.\n");
127		ret = -EINVAL;
128		goto out_err;
129	}
130
131	/* Find and map all the device's BARS */
132	bar_mask = pci_select_bars(pdev, IORESOURCE_MEM) & ADF_GEN4_BAR_MASK;
133
134	ret = pcim_request_all_regions(pdev, pci_name(pdev));
135	if (ret) {
136		dev_err(&pdev->dev, "Failed to request PCI regions.\n");
137		goto out_err;
138	}
139
140	i = 0;
141	for_each_set_bit(bar_nr, &bar_mask, PCI_STD_NUM_BARS) {
142		bar = &accel_pci_dev->pci_bars[i++];
143		bar->virt_addr = pcim_iomap(pdev, bar_nr, 0);
144		if (!bar->virt_addr) {
145			dev_err(&pdev->dev, "Failed to ioremap PCI region.\n");
146			ret = -ENOMEM;
147			goto out_err;
148		}
149	}
150
151	pci_set_master(pdev);
152
153	if (pci_save_state(pdev)) {
154		dev_err(&pdev->dev, "Failed to save pci state.\n");
155		ret = -ENOMEM;
156		goto out_err;
157	}
158
159	accel_dev->ras_errors.enabled = true;
160	adf_dbgfs_init(accel_dev);
161
162	ret = adf_dev_up(accel_dev, true);
163	if (ret)
164		goto out_err_dev_stop;
165
166	ret = adf_sysfs_init(accel_dev);
167	if (ret)
168		goto out_err_dev_stop;
169
170	return ret;
171
172out_err_dev_stop:
173	adf_dev_down(accel_dev);
174out_err:
175	adf_cleanup_accel(accel_dev);
176	return ret;
177}
178
179static void adf_remove(struct pci_dev *pdev)
180{
181	struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
182
183	if (!accel_dev) {
184		pr_err("QAT: Driver removal failed\n");
185		return;
186	}
187	adf_dev_down(accel_dev);
188	adf_cleanup_accel(accel_dev);
189}
190
191static void adf_shutdown(struct pci_dev *pdev)
192{
193	struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
194
195	adf_dev_down(accel_dev);
196}
197
198static struct pci_driver adf_driver = {
199	.id_table = adf_pci_tbl,
200	.name = ADF_4XXX_DEVICE_NAME,
201	.probe = adf_probe,
202	.remove = adf_remove,
203	.shutdown = adf_shutdown,
204	.sriov_configure = adf_sriov_configure,
205	.err_handler = &adf_err_handler,
206};
207
208module_pci_driver(adf_driver);
209
210MODULE_LICENSE("Dual BSD/GPL");
211MODULE_AUTHOR("Intel");
212MODULE_FIRMWARE(ADF_4XXX_FW);
213MODULE_FIRMWARE(ADF_402XX_FW);
214MODULE_FIRMWARE(ADF_4XXX_MMP);
215MODULE_FIRMWARE(ADF_402XX_MMP);
216MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
217MODULE_VERSION(ADF_DRV_VERSION);
218MODULE_SOFTDEP("pre: crypto-intel_qat");
219MODULE_IMPORT_NS("CRYPTO_QAT");