adf_drv.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/* Copyright(c) 2023 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_gen4_hw_data.h>
  9#include <adf_gen4_config.h>
 10#include <adf_cfg.h>
 11#include <adf_common_drv.h>
 12#include <adf_dbgfs.h>
 13
 14#include "adf_420xx_hw_data.h"
 15
 16static const struct pci_device_id adf_pci_tbl[] = {
 17	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_QAT_420XX) },
 18	{ }
 19};
 20MODULE_DEVICE_TABLE(pci, adf_pci_tbl);
 21
 22static void adf_cleanup_accel(struct adf_accel_dev *accel_dev)
 23{
 24	if (accel_dev->hw_device) {
 25		adf_clean_hw_data_420xx(accel_dev->hw_device);
 26		accel_dev->hw_device = NULL;
 27	}
 28	adf_dbgfs_exit(accel_dev);
 29	adf_cfg_dev_remove(accel_dev);
 30	adf_devmgr_rm_dev(accel_dev, NULL);
 31}
 32
 33static int adf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 34{
 35	struct adf_accel_dev *accel_dev;
 36	struct adf_accel_pci *accel_pci_dev;
 37	struct adf_hw_device_data *hw_data;
 38	unsigned int i, bar_nr;
 39	unsigned long bar_mask;
 40	struct adf_bar *bar;
 41	int ret;
 42
 43	if (num_possible_nodes() > 1 && dev_to_node(&pdev->dev) < 0) {
 44		/*
 45		 * If the accelerator is connected to a node with no memory
 46		 * there is no point in using the accelerator since the remote
 47		 * memory transaction will be very slow.
 48		 */
 49		dev_err(&pdev->dev, "Invalid NUMA configuration.\n");
 50		return -EINVAL;
 51	}
 52
 53	accel_dev = devm_kzalloc(&pdev->dev, sizeof(*accel_dev), GFP_KERNEL);
 54	if (!accel_dev)
 55		return -ENOMEM;
 56
 57	INIT_LIST_HEAD(&accel_dev->crypto_list);
 58	accel_pci_dev = &accel_dev->accel_pci_dev;
 59	accel_pci_dev->pci_dev = pdev;
 60
 61	/*
 62	 * Add accel device to accel table
 63	 * This should be called before adf_cleanup_accel is called
 64	 */
 65	if (adf_devmgr_add_dev(accel_dev, NULL)) {
 66		dev_err(&pdev->dev, "Failed to add new accelerator device.\n");
 67		return -EFAULT;
 68	}
 69
 70	accel_dev->owner = THIS_MODULE;
 71	/* Allocate and initialise device hardware meta-data structure */
 72	hw_data = devm_kzalloc(&pdev->dev, sizeof(*hw_data), GFP_KERNEL);
 73	if (!hw_data) {
 74		ret = -ENOMEM;
 75		goto out_err;
 76	}
 77
 78	accel_dev->hw_device = hw_data;
 79	adf_init_hw_data_420xx(accel_dev->hw_device, ent->device);
 80
 81	pci_read_config_byte(pdev, PCI_REVISION_ID, &accel_pci_dev->revid);
 82	pci_read_config_dword(pdev, ADF_GEN4_FUSECTL4_OFFSET, &hw_data->fuses[ADF_FUSECTL4]);
 83
 84	/* Get Accelerators and Accelerators Engines masks */
 85	hw_data->accel_mask = hw_data->get_accel_mask(hw_data);
 86	hw_data->ae_mask = hw_data->get_ae_mask(hw_data);
 87	accel_pci_dev->sku = hw_data->get_sku(hw_data);
 88	/* If the device has no acceleration engines then ignore it */
 89	if (!hw_data->accel_mask || !hw_data->ae_mask ||
 90	    (~hw_data->ae_mask & 0x01)) {
 91		dev_err(&pdev->dev, "No acceleration units found.\n");
 92		ret = -EFAULT;
 93		goto out_err;
 94	}
 95
 96	/* Create device configuration table */
 97	ret = adf_cfg_dev_add(accel_dev);
 98	if (ret)
 99		goto out_err;
100
101	/* Enable PCI device */
102	ret = pcim_enable_device(pdev);
103	if (ret) {
104		dev_err(&pdev->dev, "Can't enable PCI device.\n");
105		goto out_err;
106	}
107
108	/* Set DMA identifier */
109	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
110	if (ret) {
111		dev_err(&pdev->dev, "No usable DMA configuration.\n");
112		goto out_err;
113	}
114
115	ret = adf_gen4_cfg_dev_init(accel_dev);
116	if (ret) {
117		dev_err(&pdev->dev, "Failed to initialize configuration.\n");
118		goto out_err;
119	}
120
121	/* Get accelerator capabilities mask */
122	hw_data->accel_capabilities_mask = hw_data->get_accel_cap(accel_dev);
123	if (!hw_data->accel_capabilities_mask) {
124		dev_err(&pdev->dev, "Failed to get capabilities mask.\n");
125		ret = -EINVAL;
126		goto out_err;
127	}
128
129	/* Find and map all the device's BARS */
130	bar_mask = pci_select_bars(pdev, IORESOURCE_MEM) & ADF_GEN4_BAR_MASK;
131
132	ret = pcim_request_all_regions(pdev, pci_name(pdev));
133	if (ret) {
134		dev_err(&pdev->dev, "Failed to request PCI regions.\n");
135		goto out_err;
136	}
137
138	i = 0;
139	for_each_set_bit(bar_nr, &bar_mask, PCI_STD_NUM_BARS) {
140		bar = &accel_pci_dev->pci_bars[i++];
141		bar->virt_addr = pcim_iomap(pdev, bar_nr, 0);
142		if (!bar->virt_addr) {
143			dev_err(&pdev->dev, "Failed to ioremap PCI region.\n");
144			ret = -ENOMEM;
145			goto out_err;
146		}
147	}
148
149	pci_set_master(pdev);
150
151	if (pci_save_state(pdev)) {
152		dev_err(&pdev->dev, "Failed to save pci state.\n");
153		ret = -ENOMEM;
154		goto out_err;
155	}
156
157	accel_dev->ras_errors.enabled = true;
158	adf_dbgfs_init(accel_dev);
159
160	ret = adf_dev_up(accel_dev, true);
161	if (ret)
162		goto out_err_dev_stop;
163
164	ret = adf_sysfs_init(accel_dev);
165	if (ret)
166		goto out_err_dev_stop;
167
168	return ret;
169
170out_err_dev_stop:
171	adf_dev_down(accel_dev);
172out_err:
173	adf_cleanup_accel(accel_dev);
174	return ret;
175}
176
177static void adf_remove(struct pci_dev *pdev)
178{
179	struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
180
181	if (!accel_dev) {
182		pr_err("QAT: Driver removal failed\n");
183		return;
184	}
185	adf_dev_down(accel_dev);
186	adf_cleanup_accel(accel_dev);
187}
188
189static void adf_shutdown(struct pci_dev *pdev)
190{
191	struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
192
193	adf_dev_down(accel_dev);
194}
195
196static struct pci_driver adf_driver = {
197	.id_table = adf_pci_tbl,
198	.name = ADF_420XX_DEVICE_NAME,
199	.probe = adf_probe,
200	.remove = adf_remove,
201	.shutdown = adf_shutdown,
202	.sriov_configure = adf_sriov_configure,
203	.err_handler = &adf_err_handler,
204};
205
206module_pci_driver(adf_driver);
207
208MODULE_LICENSE("GPL");
209MODULE_AUTHOR("Intel");
210MODULE_FIRMWARE(ADF_420XX_FW);
211MODULE_FIRMWARE(ADF_420XX_MMP);
212MODULE_DESCRIPTION("Intel(R) QuickAssist Technology");
213MODULE_VERSION(ADF_DRV_VERSION);
214MODULE_SOFTDEP("pre: crypto-intel_qat");
215MODULE_IMPORT_NS("CRYPTO_QAT");