1 // SPDX-License-Identifier: GPL-2.0-only
4  * Copyright 2005-2006 Fen Systems Ltd.
5  * Copyright 2006-2013 Solarflare Communications Inc.
33 	buffer->addr = dma_alloc_coherent(&efx->pci_dev->dev, len,  in ef4_nic_alloc_buffer()
34 					  &buffer->dma_addr, gfp_flags);  in ef4_nic_alloc_buffer()
35 	if (!buffer->addr)  in ef4_nic_alloc_buffer()
36 		return -ENOMEM;  in ef4_nic_alloc_buffer()
37 	buffer->len = len;  in ef4_nic_alloc_buffer()
43 	if (buffer->addr) {  in ef4_nic_free_buffer()
44 		dma_free_coherent(&efx->pci_dev->dev, buffer->len,  in ef4_nic_free_buffer()
45 				  buffer->addr, buffer->dma_addr);  in ef4_nic_free_buffer()
46 		buffer->addr = NULL;  in ef4_nic_free_buffer()
51  * read pointer.  Only useful for self-test.
55 	return ef4_event_present(ef4_event(channel, channel->eventq_read_ptr));  in ef4_nic_event_present()
60 	channel->event_test_cpu = -1;  in ef4_nic_event_test_start()
62 	channel->efx->type->ev_test_generate(channel);  in ef4_nic_event_test_start()
67 	efx->last_irq_cpu = -1;  in ef4_nic_irq_test_start()
69 	return efx->type->irq_test_generate(efx);  in ef4_nic_irq_test_start()
82 		rc = request_irq(efx->legacy_irq,  in ef4_nic_init_interrupt()
83 				 efx->type->irq_handle_legacy, IRQF_SHARED,  in ef4_nic_init_interrupt()
84 				 efx->name, efx);  in ef4_nic_init_interrupt()
86 			netif_err(efx, drv, efx->net_dev,  in ef4_nic_init_interrupt()
88 				  efx->pci_dev->irq);  in ef4_nic_init_interrupt()
95 	if (efx->interrupt_mode == EF4_INT_MODE_MSIX) {  in ef4_nic_init_interrupt()
96 		efx->net_dev->rx_cpu_rmap =  in ef4_nic_init_interrupt()
97 			alloc_irq_cpu_rmap(efx->n_rx_channels);  in ef4_nic_init_interrupt()
98 		if (!efx->net_dev->rx_cpu_rmap) {  in ef4_nic_init_interrupt()
99 			rc = -ENOMEM;  in ef4_nic_init_interrupt()
105 	/* Hook MSI or MSI-X interrupt */  in ef4_nic_init_interrupt()
108 		rc = request_irq(channel->irq, efx->type->irq_handle_msi,  in ef4_nic_init_interrupt()
110 				 efx->msi_context[channel->channel].name,  in ef4_nic_init_interrupt()
111 				 &efx->msi_context[channel->channel]);  in ef4_nic_init_interrupt()
113 			netif_err(efx, drv, efx->net_dev,  in ef4_nic_init_interrupt()
114 				  "failed to hook IRQ %d\n", channel->irq);  in ef4_nic_init_interrupt()
120 		if (efx->interrupt_mode == EF4_INT_MODE_MSIX &&  in ef4_nic_init_interrupt()
121 		    channel->channel < efx->n_rx_channels) {  in ef4_nic_init_interrupt()
122 			rc = irq_cpu_rmap_add(efx->net_dev->rx_cpu_rmap,  in ef4_nic_init_interrupt()
123 					      channel->irq);  in ef4_nic_init_interrupt()
134 	free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap);  in ef4_nic_init_interrupt()
135 	efx->net_dev->rx_cpu_rmap = NULL;  in ef4_nic_init_interrupt()
138 		if (n_irqs-- == 0)  in ef4_nic_init_interrupt()
140 		free_irq(channel->irq, &efx->msi_context[channel->channel]);  in ef4_nic_init_interrupt()
151 	free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap);  in ef4_nic_fini_interrupt()
152 	efx->net_dev->rx_cpu_rmap = NULL;  in ef4_nic_fini_interrupt()
156 		/* Disable MSI/MSI-X interrupts */  in ef4_nic_fini_interrupt()
158 			free_irq(channel->irq,  in ef4_nic_fini_interrupt()
159 				 &efx->msi_context[channel->channel]);  in ef4_nic_fini_interrupt()
162 		free_irq(efx->legacy_irq, efx);  in ef4_nic_fini_interrupt()
370 		if (efx->type->revision >= reg->min_revision &&  in ef4_nic_get_regs_len()
371 		    efx->type->revision <= reg->max_revision)  in ef4_nic_get_regs_len()
377 		if (efx->type->revision >= table->min_revision &&  in ef4_nic_get_regs_len()
378 		    efx->type->revision <= table->max_revision)  in ef4_nic_get_regs_len()
379 			len += table->rows * min_t(size_t, table->step, 16);  in ef4_nic_get_regs_len()
392 		if (efx->type->revision >= reg->min_revision &&  in ef4_nic_get_regs()
393 		    efx->type->revision <= reg->max_revision) {  in ef4_nic_get_regs()
394 			ef4_reado(efx, (ef4_oword_t *)buf, reg->offset);  in ef4_nic_get_regs()
404 		if (!(efx->type->revision >= table->min_revision &&  in ef4_nic_get_regs()
405 		      efx->type->revision <= table->max_revision))  in ef4_nic_get_regs()
408 		size = min_t(size_t, table->step, 16);  in ef4_nic_get_regs()
410 		for (i = 0; i < table->rows; i++) {  in ef4_nic_get_regs()
411 			switch (table->step) {  in ef4_nic_get_regs()
412 			case 4: /* 32-bit SRAM */  in ef4_nic_get_regs()
413 				ef4_readd(efx, buf, table->offset + 4 * i);  in ef4_nic_get_regs()
415 			case 8: /* 64-bit SRAM */  in ef4_nic_get_regs()
417 					       efx->membase + table->offset,  in ef4_nic_get_regs()
420 			case 16: /* 128-bit-readable register */  in ef4_nic_get_regs()
421 				ef4_reado_table(efx, buf, table->offset, i);  in ef4_nic_get_regs()
423 			case 32: /* 128-bit register, interleaved */  in ef4_nic_get_regs()
424 				ef4_reado_table(efx, buf, table->offset, 2 * i);  in ef4_nic_get_regs()
436  * ef4_nic_describe_stats - Describe supported statistics for ethtool
437  * @desc: Array of &struct ef4_hw_stat_desc describing the statistics
464  * ef4_nic_update_stats - Convert statistics DMA buffer to array of u64
465  * @desc: Array of &struct ef4_hw_stat_desc describing the DMA buffer