11 #include <linux/msi.h>
39 #define msi_hwirq(msi, msir_index, intr_index) \  argument
40 		((msir_index) << (msi)->srs_shift | \
41 		 ((intr_index) << (msi)->ibs_shift))
63  * in the cascade interrupt. So, this MSI interrupt has been acked
78 	seq_printf(p, " fsl-msi-%d", cascade_virq);  in fsl_msi_print_chip()
152 	/* If the msi-address-64 property exists, then use it */  in fsl_compose_msi_msg()
153 	reg = of_get_property(hose->dn, "msi-address-64", &len);  in fsl_compose_msi_msg()
164 	 * that neither MSI nor MSI-X can work fine.  in fsl_compose_msi_msg()
165 	 * This is a workaround to allow MSI-X to function  in fsl_compose_msi_msg()
166 	 * properly. It only works for MSI-X, we prevent  in fsl_compose_msi_msg()
167 	 * MSI on buggy chips in fsl_setup_msi_irqs().  in fsl_compose_msi_msg()
192 		 * MPIC version 2.0 has erratum PIC1. For now MSI  in fsl_setup_msi_irqs()
193 		 * could not work. So check to prevent MSI from  in fsl_setup_msi_irqs()
202 	 * If the PCI node has an fsl,msi property, then we need to use it  in fsl_setup_msi_irqs()
203 	 * to find the specific MSI.  in fsl_setup_msi_irqs()
205 	np = of_parse_phandle(hose->dn, "fsl,msi", 0);  in fsl_setup_msi_irqs()
207 		if (of_device_is_compatible(np, "fsl,mpic-msi") ||  in fsl_setup_msi_irqs()
208 		    of_device_is_compatible(np, "fsl,vmpic-msi") ||  in fsl_setup_msi_irqs()
209 		    of_device_is_compatible(np, "fsl,vmpic-msi-v4.3"))  in fsl_setup_msi_irqs()
213 				"node %pOF has an invalid fsl,msi phandle %u\n",  in fsl_setup_msi_irqs()
223 		 * Loop over all the MSI devices until we find one that has an  in fsl_setup_msi_irqs()
228 			 * If the PCI node has an fsl,msi property, then we  in fsl_setup_msi_irqs()
229 			 * restrict our search to the corresponding MSI node.  in fsl_setup_msi_irqs()
230 			 * The simplest way is to skip over MSI nodes with the  in fsl_setup_msi_irqs()
232 			 * has the additional benefit of skipping over MSI  in fsl_setup_msi_irqs()
245 			dev_err(&pdev->dev, "could not allocate MSI interrupt\n");  in fsl_setup_msi_irqs()
297 			pr_err("fsl-msi: fh_vmpic_get_msir() failed for "  in fsl_msi_cascade()
325 	struct fsl_msi *msi = platform_get_drvdata(ofdev);  in fsl_of_msi_remove()  local
328 	if (msi->list.prev != NULL)  in fsl_of_msi_remove()
329 		list_del(&msi->list);  in fsl_of_msi_remove()
331 		if (msi->cascade_array[i]) {  in fsl_of_msi_remove()
332 			virq = msi->cascade_array[i]->virq;  in fsl_of_msi_remove()
336 			free_irq(virq, msi->cascade_array[i]);  in fsl_of_msi_remove()
337 			kfree(msi->cascade_array[i]);  in fsl_of_msi_remove()
341 	if (msi->bitmap.bitmap)  in fsl_of_msi_remove()
342 		msi_bitmap_free(&msi->bitmap);  in fsl_of_msi_remove()
343 	if ((msi->feature & FSL_PIC_IP_MASK) != FSL_PIC_IP_VMPIC)  in fsl_of_msi_remove()
344 		iounmap(msi->msi_regs);  in fsl_of_msi_remove()
345 	kfree(msi);  in fsl_of_msi_remove()
351 static int fsl_msi_setup_hwirq(struct fsl_msi *msi, struct platform_device *dev,  in fsl_msi_setup_hwirq()  argument
366 		dev_err(&dev->dev, "No memory for MSI cascade data\n");  in fsl_msi_setup_hwirq()
372 	cascade_data->msi_data = msi;  in fsl_msi_setup_hwirq()
374 	msi->cascade_array[irq_index] = cascade_data;  in fsl_msi_setup_hwirq()
377 			  "fsl-msi-cascade", cascade_data);  in fsl_msi_setup_hwirq()
384 	/* Release the hwirqs corresponding to this MSI register */  in fsl_msi_setup_hwirq()
386 		msi_bitmap_free_hwirqs(&msi->bitmap,  in fsl_msi_setup_hwirq()
387 				       msi_hwirq(msi, offset, i), 1);  in fsl_msi_setup_hwirq()
395 	struct fsl_msi *msi;  in fsl_of_msi_probe()  local
406 	printk(KERN_DEBUG "Setting up Freescale MSI support\n");  in fsl_of_msi_probe()
408 	msi = kzalloc(sizeof(struct fsl_msi), GFP_KERNEL);  in fsl_of_msi_probe()
409 	if (!msi) {  in fsl_of_msi_probe()
410 		dev_err(&dev->dev, "No memory for MSI structure\n");  in fsl_of_msi_probe()
413 	platform_set_drvdata(dev, msi);  in fsl_of_msi_probe()
415 	msi->irqhost = irq_domain_add_linear(dev->dev.of_node,  in fsl_of_msi_probe()
416 				      NR_MSI_IRQS_MAX, &fsl_msi_host_ops, msi);  in fsl_of_msi_probe()
418 	if (msi->irqhost == NULL) {  in fsl_of_msi_probe()
419 		dev_err(&dev->dev, "No memory for MSI irqhost\n");  in fsl_of_msi_probe()
425 	 * Under the Freescale hypervisor, the msi nodes don't have a 'reg'  in fsl_of_msi_probe()
426 	 * property.  Instead, we use hypercalls to access the MSI.  in fsl_of_msi_probe()
436 		msi->msi_regs = ioremap(res.start, resource_size(&res));  in fsl_of_msi_probe()
437 		if (!msi->msi_regs) {  in fsl_of_msi_probe()
443 		msi->msiir_offset =  in fsl_of_msi_probe()
451 			msi->msiir_offset = features->msiir_offset +  in fsl_of_msi_probe()
454 			msi->msiir_offset = msiir.start & MSIIR_OFFSET_MASK;  in fsl_of_msi_probe()
457 	msi->feature = features->fsl_pic_ip;  in fsl_of_msi_probe()
462 		msi->feature |= MSI_HW_ERRATA_ENDIAN;  in fsl_of_msi_probe()
466 	 * that have an "fsl,msi" property.  in fsl_of_msi_probe()
468 	msi->phandle = dev->dev.of_node->phandle;  in fsl_of_msi_probe()
470 	err = fsl_msi_init_allocator(msi);  in fsl_of_msi_probe()
472 		dev_err(&dev->dev, "Error allocating MSI bitmap\n");  in fsl_of_msi_probe()
476 	p = of_get_property(dev->dev.of_node, "msi-available-ranges", &len);  in fsl_of_msi_probe()
478 	if (of_device_is_compatible(dev->dev.of_node, "fsl,mpic-msi-v4.3") ||  in fsl_of_msi_probe()
479 	    of_device_is_compatible(dev->dev.of_node, "fsl,vmpic-msi-v4.3")) {  in fsl_of_msi_probe()
480 		msi->srs_shift = MSIIR1_SRS_SHIFT;  in fsl_of_msi_probe()
481 		msi->ibs_shift = MSIIR1_IBS_SHIFT;  in fsl_of_msi_probe()
483 			dev_warn(&dev->dev, "%s: dose not support msi-available-ranges property\n",  in fsl_of_msi_probe()
488 			err = fsl_msi_setup_hwirq(msi, dev,  in fsl_of_msi_probe()
497 		msi->srs_shift = MSIIR_SRS_SHIFT;  in fsl_of_msi_probe()
498 		msi->ibs_shift = MSIIR_IBS_SHIFT;  in fsl_of_msi_probe()
501 			dev_err(&dev->dev, "%s: Malformed msi-available-ranges property\n",  in fsl_of_msi_probe()
515 				pr_warn("%s: %pOF: msi available range of %u at %u is not IRQ-aligned\n",  in fsl_of_msi_probe()
526 				err = fsl_msi_setup_hwirq(msi, dev, offset + j,  in fsl_of_msi_probe()
534 	list_add_tail(&msi->list, &msi_head);  in fsl_of_msi_probe()
537 	 * Apply the MSI ops to all the controllers.  in fsl_of_msi_probe()
539 	 * but bail out if we find another MSI driver.  in fsl_of_msi_probe()
546 			dev_err(&dev->dev, "Different MSI driver already installed!\n");  in fsl_of_msi_probe()
576 		.compatible = "fsl,mpic-msi",
580 		.compatible = "fsl,mpic-msi-v4.3",
584 		.compatible = "fsl,ipic-msi",
589 		.compatible = "fsl,vmpic-msi",
593 		.compatible = "fsl,vmpic-msi-v4.3",
602 		.name = "fsl-msi",