aq_pci_func.c 6.1 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
/*
 * aQuantia Corporation Network Driver
 * Copyright (C) 2014-2017 aQuantia Corporation. All rights reserved
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 */

/* File aq_pci_func.c: Definition of PCI functions. */

#include "aq_pci_func.h"
#include "aq_nic.h"
#include "aq_vec.h"
#include "aq_hw.h"
#include <linux/interrupt.h>

struct aq_pci_func_s {
	struct pci_dev *pdev;
	struct aq_nic_s *port[AQ_CFG_PCI_FUNC_PORTS];
	void __iomem *mmio;
	void *aq_vec[AQ_CFG_PCI_FUNC_MSIX_IRQS];
	resource_size_t mmio_pa;
	unsigned int msix_entry_mask;
	unsigned int ports;
	bool is_pci_enabled;
	bool is_regions;
	bool is_pci_using_dac;
	struct aq_hw_caps_s aq_hw_caps;
};

32
struct aq_pci_func_s *aq_pci_func_alloc(const struct aq_hw_ops *aq_hw_ops,
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53
					struct pci_dev *pdev,
					const struct net_device_ops *ndev_ops,
					const struct ethtool_ops *eth_ops)
{
	struct aq_pci_func_s *self = NULL;
	int err = 0;
	unsigned int port = 0U;

	if (!aq_hw_ops) {
		err = -EFAULT;
		goto err_exit;
	}
	self = kzalloc(sizeof(*self), GFP_KERNEL);
	if (!self) {
		err = -ENOMEM;
		goto err_exit;
	}

	pci_set_drvdata(pdev, self);
	self->pdev = pdev;

54 55
	err = aq_hw_ops->get_hw_caps(NULL, &self->aq_hw_caps, pdev->device,
				     pdev->subsystem_device);
56 57 58 59 60 61 62
	if (err < 0)
		goto err_exit;

	self->ports = self->aq_hw_caps.ports;

	for (port = 0; port < self->ports; ++port) {
		struct aq_nic_s *aq_nic = aq_nic_alloc_cold(ndev_ops, eth_ops,
63
							    pdev, self,
64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88
							    port, aq_hw_ops);

		if (!aq_nic) {
			err = -ENOMEM;
			goto err_exit;
		}
		self->port[port] = aq_nic;
	}

err_exit:
	if (err < 0) {
		if (self)
			aq_pci_func_free(self);
		self = NULL;
	}

	(void)err;
	return self;
}

int aq_pci_func_init(struct aq_pci_func_s *self)
{
	int err = 0;
	unsigned int bar = 0U;
	unsigned int port = 0U;
89
	unsigned int numvecs = 0U;
90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146

	err = pci_enable_device(self->pdev);
	if (err < 0)
		goto err_exit;

	self->is_pci_enabled = true;

	err = pci_set_dma_mask(self->pdev, DMA_BIT_MASK(64));
	if (!err) {
		err = pci_set_consistent_dma_mask(self->pdev, DMA_BIT_MASK(64));
		self->is_pci_using_dac = 1;
	}
	if (err) {
		err = pci_set_dma_mask(self->pdev, DMA_BIT_MASK(32));
		if (!err)
			err = pci_set_consistent_dma_mask(self->pdev,
							  DMA_BIT_MASK(32));
		self->is_pci_using_dac = 0;
	}
	if (err != 0) {
		err = -ENOSR;
		goto err_exit;
	}

	err = pci_request_regions(self->pdev, AQ_CFG_DRV_NAME "_mmio");
	if (err < 0)
		goto err_exit;

	self->is_regions = true;

	pci_set_master(self->pdev);

	for (bar = 0; bar < 4; ++bar) {
		if (IORESOURCE_MEM & pci_resource_flags(self->pdev, bar)) {
			resource_size_t reg_sz;

			self->mmio_pa = pci_resource_start(self->pdev, bar);
			if (self->mmio_pa == 0U) {
				err = -EIO;
				goto err_exit;
			}

			reg_sz = pci_resource_len(self->pdev, bar);
			if ((reg_sz <= 24 /*ATL_REGS_SIZE*/)) {
				err = -EIO;
				goto err_exit;
			}

			self->mmio = ioremap_nocache(self->mmio_pa, reg_sz);
			if (!self->mmio) {
				err = -EIO;
				goto err_exit;
			}
			break;
		}
	}

147 148 149 150
	numvecs = min((u8)AQ_CFG_VECS_DEF, self->aq_hw_caps.msix_irqs);
	numvecs = min(numvecs, num_online_cpus());

	/* enable interrupts */
151
#if !AQ_CFG_FORCE_LEGACY_INT
152
	err = pci_alloc_irq_vectors(self->pdev, numvecs, numvecs, PCI_IRQ_MSIX);
153

154 155 156 157 158
	if (err < 0) {
		err = pci_alloc_irq_vectors(self->pdev, 1, 1,
				PCI_IRQ_MSI | PCI_IRQ_LEGACY);
		if (err < 0)
			goto err_exit;
159
	}
160
#endif /* AQ_CFG_FORCE_LEGACY_INT */
161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188

	/* net device init */
	for (port = 0; port < self->ports; ++port) {
		if (!self->port[port])
			continue;

		err = aq_nic_cfg_start(self->port[port]);
		if (err < 0)
			goto err_exit;

		err = aq_nic_ndev_init(self->port[port]);
		if (err < 0)
			goto err_exit;

		err = aq_nic_ndev_register(self->port[port]);
		if (err < 0)
			goto err_exit;
	}

err_exit:
	if (err < 0)
		aq_pci_func_deinit(self);
	return err;
}

int aq_pci_func_alloc_irq(struct aq_pci_func_s *self, unsigned int i,
			  char *name, void *aq_vec, cpumask_t *affinity_mask)
{
189
	struct pci_dev *pdev = self->pdev;
190 191
	int err = 0;

192 193
	if (pdev->msix_enabled || pdev->msi_enabled)
		err = request_irq(pci_irq_vector(pdev, i), aq_vec_isr, 0,
194
				  name, aq_vec);
195 196
	else
		err = request_irq(pci_irq_vector(pdev, i), aq_vec_isr_legacy,
197 198 199 200 201 202
				  IRQF_SHARED, name, aq_vec);

	if (err >= 0) {
		self->msix_entry_mask |= (1 << i);
		self->aq_vec[i] = aq_vec;

203 204
		if (pdev->msix_enabled)
			irq_set_affinity_hint(pci_irq_vector(pdev, i),
205 206 207 208 209 210 211 212
					      affinity_mask);
	}

	return err;
}

void aq_pci_func_free_irqs(struct aq_pci_func_s *self)
{
213
	struct pci_dev *pdev = self->pdev;
214 215 216 217 218 219
	unsigned int i = 0U;

	for (i = 32U; i--;) {
		if (!((1U << i) & self->msix_entry_mask))
			continue;

220 221
		if (pdev->msix_enabled)
			irq_set_affinity_hint(pci_irq_vector(pdev, i), NULL);
222
		free_irq(pci_irq_vector(pdev, i), self->aq_vec[i]);
223 224 225 226 227 228 229 230 231 232 233
		self->msix_entry_mask &= ~(1U << i);
	}
}

void __iomem *aq_pci_func_get_mmio(struct aq_pci_func_s *self)
{
	return self->mmio;
}

unsigned int aq_pci_func_get_irq_type(struct aq_pci_func_s *self)
{
234 235 236 237 238
	if (self->pdev->msix_enabled)
		return AQ_HW_IRQ_MSIX;
	if (self->pdev->msi_enabled)
		return AQ_HW_IRQ_MSIX;
	return AQ_HW_IRQ_LEGACY;
239 240 241 242 243 244 245 246
}

void aq_pci_func_deinit(struct aq_pci_func_s *self)
{
	if (!self)
		goto err_exit;

	aq_pci_func_free_irqs(self);
247
	pci_free_irq_vectors(self->pdev);
248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271

	if (self->is_regions)
		pci_release_regions(self->pdev);

	if (self->is_pci_enabled)
		pci_disable_device(self->pdev);

err_exit:;
}

void aq_pci_func_free(struct aq_pci_func_s *self)
{
	unsigned int port = 0U;

	if (!self)
		goto err_exit;

	for (port = 0; port < self->ports; ++port) {
		if (!self->port[port])
			continue;

		aq_nic_ndev_free(self->port[port]);
	}

272 273 274
	if (self->mmio)
		iounmap(self->mmio);

275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299
	kfree(self);

err_exit:;
}

int aq_pci_func_change_pm_state(struct aq_pci_func_s *self,
				pm_message_t *pm_msg)
{
	int err = 0;
	unsigned int port = 0U;

	if (!self) {
		err = -EFAULT;
		goto err_exit;
	}
	for (port = 0; port < self->ports; ++port) {
		if (!self->port[port])
			continue;

		(void)aq_nic_change_pm_state(self->port[port], pm_msg);
	}

err_exit:
	return err;
}