1 // SPDX-License-Identifier: GPL-2.0-only
4  * Copyright 2005-2006 Fen Systems Ltd.
5  * Copyright 2006-2013 Solarflare Communications Inc.
34 	buffer->addr = dma_alloc_coherent(&efx->pci_dev->dev, len,  in efx_siena_alloc_buffer()
35 					  &buffer->dma_addr, gfp_flags);  in efx_siena_alloc_buffer()
36 	if (!buffer->addr)  in efx_siena_alloc_buffer()
37 		return -ENOMEM;  in efx_siena_alloc_buffer()
38 	buffer->len = len;  in efx_siena_alloc_buffer()
44 	if (buffer->addr) {  in efx_siena_free_buffer()
45 		dma_free_coherent(&efx->pci_dev->dev, buffer->len,  in efx_siena_free_buffer()
46 				  buffer->addr, buffer->dma_addr);  in efx_siena_free_buffer()
47 		buffer->addr = NULL;  in efx_siena_free_buffer()
52  * read pointer.  Only useful for self-test.
56 	return efx_event_present(efx_event(channel, channel->eventq_read_ptr));  in efx_siena_event_present()
61 	channel->event_test_cpu = -1;  in efx_siena_event_test_start()
63 	channel->efx->type->ev_test_generate(channel);  in efx_siena_event_test_start()
68 	efx->last_irq_cpu = -1;  in efx_siena_irq_test_start()
70 	return efx->type->irq_test_generate(efx);  in efx_siena_irq_test_start()
83 		rc = request_irq(efx->legacy_irq,  in efx_siena_init_interrupt()
84 				 efx->type->irq_handle_legacy, IRQF_SHARED,  in efx_siena_init_interrupt()
85 				 efx->name, efx);  in efx_siena_init_interrupt()
87 			netif_err(efx, drv, efx->net_dev,  in efx_siena_init_interrupt()
89 				  efx->pci_dev->irq);  in efx_siena_init_interrupt()
92 		efx->irqs_hooked = true;  in efx_siena_init_interrupt()
97 	if (efx->interrupt_mode == EFX_INT_MODE_MSIX) {  in efx_siena_init_interrupt()
98 		efx->net_dev->rx_cpu_rmap =  in efx_siena_init_interrupt()
99 			alloc_irq_cpu_rmap(efx->n_rx_channels);  in efx_siena_init_interrupt()
100 		if (!efx->net_dev->rx_cpu_rmap) {  in efx_siena_init_interrupt()
101 			rc = -ENOMEM;  in efx_siena_init_interrupt()
107 	/* Hook MSI or MSI-X interrupt */  in efx_siena_init_interrupt()
110 		rc = request_irq(channel->irq, efx->type->irq_handle_msi,  in efx_siena_init_interrupt()
112 				 efx->msi_context[channel->channel].name,  in efx_siena_init_interrupt()
113 				 &efx->msi_context[channel->channel]);  in efx_siena_init_interrupt()
115 			netif_err(efx, drv, efx->net_dev,  in efx_siena_init_interrupt()
116 				  "failed to hook IRQ %d\n", channel->irq);  in efx_siena_init_interrupt()
122 		if (efx->interrupt_mode == EFX_INT_MODE_MSIX &&  in efx_siena_init_interrupt()
123 		    channel->channel < efx->n_rx_channels) {  in efx_siena_init_interrupt()
124 			rc = irq_cpu_rmap_add(efx->net_dev->rx_cpu_rmap,  in efx_siena_init_interrupt()
125 					      channel->irq);  in efx_siena_init_interrupt()
132 	efx->irqs_hooked = true;  in efx_siena_init_interrupt()
137 	free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap);  in efx_siena_init_interrupt()
138 	efx->net_dev->rx_cpu_rmap = NULL;  in efx_siena_init_interrupt()
141 		if (n_irqs-- == 0)  in efx_siena_init_interrupt()
143 		free_irq(channel->irq, &efx->msi_context[channel->channel]);  in efx_siena_init_interrupt()
154 	free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap);  in efx_siena_fini_interrupt()
155 	efx->net_dev->rx_cpu_rmap = NULL;  in efx_siena_fini_interrupt()
158 	if (!efx->irqs_hooked)  in efx_siena_fini_interrupt()
161 		/* Disable MSI/MSI-X interrupts */  in efx_siena_fini_interrupt()
163 			free_irq(channel->irq,  in efx_siena_fini_interrupt()
164 				 &efx->msi_context[channel->channel]);  in efx_siena_fini_interrupt()
167 		free_irq(efx->legacy_irq, efx);  in efx_siena_fini_interrupt()
169 	efx->irqs_hooked = false;  in efx_siena_fini_interrupt()
376 		if (efx->type->revision >= reg->min_revision &&  in efx_siena_get_regs_len()
377 		    efx->type->revision <= reg->max_revision)  in efx_siena_get_regs_len()
383 		if (efx->type->revision >= table->min_revision &&  in efx_siena_get_regs_len()
384 		    efx->type->revision <= table->max_revision)  in efx_siena_get_regs_len()
385 			len += table->rows * min_t(size_t, table->step, 16);  in efx_siena_get_regs_len()
398 		if (efx->type->revision >= reg->min_revision &&  in efx_siena_get_regs()
399 		    efx->type->revision <= reg->max_revision) {  in efx_siena_get_regs()
400 			efx_reado(efx, (efx_oword_t *)buf, reg->offset);  in efx_siena_get_regs()
410 		if (!(efx->type->revision >= table->min_revision &&  in efx_siena_get_regs()
411 		      efx->type->revision <= table->max_revision))  in efx_siena_get_regs()
414 		size = min_t(size_t, table->step, 16);  in efx_siena_get_regs()
416 		for (i = 0; i < table->rows; i++) {  in efx_siena_get_regs()
417 			switch (table->step) {  in efx_siena_get_regs()
418 			case 4: /* 32-bit SRAM */  in efx_siena_get_regs()
419 				efx_readd(efx, buf, table->offset + 4 * i);  in efx_siena_get_regs()
421 			case 8: /* 64-bit SRAM */  in efx_siena_get_regs()
423 					       efx->membase + table->offset,  in efx_siena_get_regs()
426 			case 16: /* 128-bit-readable register */  in efx_siena_get_regs()
427 				efx_reado_table(efx, buf, table->offset, i);  in efx_siena_get_regs()
429 			case 32: /* 128-bit register, interleaved */  in efx_siena_get_regs()
430 				efx_reado_table(efx, buf, table->offset, 2 * i);  in efx_siena_get_regs()
442  * efx_siena_describe_stats - Describe supported statistics for ethtool
443  * @desc: Array of &struct efx_hw_stat_desc describing the statistics
473  * efx_siena_update_stats - Convert statistics DMA buffer to array of u64
474  * @desc: Array of &struct efx_hw_stat_desc describing the DMA buffer
524 	if (!(efx->net_dev->flags & IFF_UP) || !efx->rx_nodesc_drops_prev_state)  in efx_siena_fix_nodesc_drop_stat()
525 		efx->rx_nodesc_drops_while_down +=  in efx_siena_fix_nodesc_drop_stat()
526 			*rx_nodesc_drops - efx->rx_nodesc_drops_total;  in efx_siena_fix_nodesc_drop_stat()
527 	efx->rx_nodesc_drops_total = *rx_nodesc_drops;  in efx_siena_fix_nodesc_drop_stat()
528 	efx->rx_nodesc_drops_prev_state = !!(efx->net_dev->flags & IFF_UP);  in efx_siena_fix_nodesc_drop_stat()
529 	*rx_nodesc_drops -= efx->rx_nodesc_drops_while_down;  in efx_siena_fix_nodesc_drop_stat()