11 #include <linux/msi.h>
35 #define msi_hwirq(msi, msir_index, intr_index) \  argument
36 		((msir_index) << (msi)->srs_shift | \
37 		 ((intr_index) << (msi)->ibs_shift))
59  * in the cascade interrupt. So, this MSI interrupt has been acked
74 	seq_printf(p, " fsl-msi-%d", cascade_virq);  in fsl_msi_print_chip()
151 	/* If the msi-address-64 property exists, then use it */  in fsl_compose_msi_msg()
152 	reg = of_get_property(hose->dn, "msi-address-64", &len);  in fsl_compose_msi_msg()
163 	 * that neither MSI nor MSI-X can work fine.  in fsl_compose_msi_msg()
164 	 * This is a workaround to allow MSI-X to function  in fsl_compose_msi_msg()
165 	 * properly. It only works for MSI-X, we prevent  in fsl_compose_msi_msg()
166 	 * MSI on buggy chips in fsl_setup_msi_irqs().  in fsl_compose_msi_msg()
191 		 * MPIC version 2.0 has erratum PIC1. For now MSI  in fsl_setup_msi_irqs()
192 		 * could not work. So check to prevent MSI from  in fsl_setup_msi_irqs()
201 	 * If the PCI node has an fsl,msi property, then we need to use it  in fsl_setup_msi_irqs()
202 	 * to find the specific MSI.  in fsl_setup_msi_irqs()
204 	np = of_parse_phandle(hose->dn, "fsl,msi", 0);  in fsl_setup_msi_irqs()
206 		if (of_device_is_compatible(np, "fsl,mpic-msi") ||  in fsl_setup_msi_irqs()
207 		    of_device_is_compatible(np, "fsl,vmpic-msi") ||  in fsl_setup_msi_irqs()
208 		    of_device_is_compatible(np, "fsl,vmpic-msi-v4.3"))  in fsl_setup_msi_irqs()
212 				"node %pOF has an invalid fsl,msi phandle %u\n",  in fsl_setup_msi_irqs()
220 		 * Loop over all the MSI devices until we find one that has an  in fsl_setup_msi_irqs()
225 			 * If the PCI node has an fsl,msi property, then we  in fsl_setup_msi_irqs()
226 			 * restrict our search to the corresponding MSI node.  in fsl_setup_msi_irqs()
227 			 * The simplest way is to skip over MSI nodes with the  in fsl_setup_msi_irqs()
229 			 * has the additional benefit of skipping over MSI  in fsl_setup_msi_irqs()
242 			dev_err(&pdev->dev, "could not allocate MSI interrupt\n");  in fsl_setup_msi_irqs()
298 			pr_err("fsl-msi: fh_vmpic_get_msir() failed for "  in fsl_msi_cascade()
326 	struct fsl_msi *msi = platform_get_drvdata(ofdev);  in fsl_of_msi_remove()  local
329 	if (msi->list.prev != NULL)  in fsl_of_msi_remove()
330 		list_del(&msi->list);  in fsl_of_msi_remove()
332 		if (msi->cascade_array[i]) {  in fsl_of_msi_remove()
333 			virq = msi->cascade_array[i]->virq;  in fsl_of_msi_remove()
337 			free_irq(virq, msi->cascade_array[i]);  in fsl_of_msi_remove()
338 			kfree(msi->cascade_array[i]);  in fsl_of_msi_remove()
342 	if (msi->bitmap.bitmap)  in fsl_of_msi_remove()
343 		msi_bitmap_free(&msi->bitmap);  in fsl_of_msi_remove()
344 	if ((msi->feature & FSL_PIC_IP_MASK) != FSL_PIC_IP_VMPIC)  in fsl_of_msi_remove()
345 		iounmap(msi->msi_regs);  in fsl_of_msi_remove()
346 	kfree(msi);  in fsl_of_msi_remove()
354 static int fsl_msi_setup_hwirq(struct fsl_msi *msi, struct platform_device *dev,  in fsl_msi_setup_hwirq()  argument
369 		dev_err(&dev->dev, "No memory for MSI cascade data\n");  in fsl_msi_setup_hwirq()
375 	cascade_data->msi_data = msi;  in fsl_msi_setup_hwirq()
377 	msi->cascade_array[irq_index] = cascade_data;  in fsl_msi_setup_hwirq()
380 			  "fsl-msi-cascade", cascade_data);  in fsl_msi_setup_hwirq()
387 	/* Release the hwirqs corresponding to this MSI register */  in fsl_msi_setup_hwirq()
389 		msi_bitmap_free_hwirqs(&msi->bitmap,  in fsl_msi_setup_hwirq()
390 				       msi_hwirq(msi, offset, i), 1);  in fsl_msi_setup_hwirq()
399 	struct fsl_msi *msi;  in fsl_of_msi_probe()  local
413 	printk(KERN_DEBUG "Setting up Freescale MSI support\n");  in fsl_of_msi_probe()
415 	msi = kzalloc(sizeof(struct fsl_msi), GFP_KERNEL);  in fsl_of_msi_probe()
416 	if (!msi) {  in fsl_of_msi_probe()
417 		dev_err(&dev->dev, "No memory for MSI structure\n");  in fsl_of_msi_probe()
420 	platform_set_drvdata(dev, msi);  in fsl_of_msi_probe()
422 	msi->irqhost = irq_domain_add_linear(dev->dev.of_node,  in fsl_of_msi_probe()
423 				      NR_MSI_IRQS_MAX, &fsl_msi_host_ops, msi);  in fsl_of_msi_probe()
425 	if (msi->irqhost == NULL) {  in fsl_of_msi_probe()
426 		dev_err(&dev->dev, "No memory for MSI irqhost\n");  in fsl_of_msi_probe()
432 	 * Under the Freescale hypervisor, the msi nodes don't have a 'reg'  in fsl_of_msi_probe()
433 	 * property.  Instead, we use hypercalls to access the MSI.  in fsl_of_msi_probe()
443 		msi->msi_regs = ioremap(res.start, resource_size(&res));  in fsl_of_msi_probe()
444 		if (!msi->msi_regs) {  in fsl_of_msi_probe()
450 		msi->msiir_offset =  in fsl_of_msi_probe()
458 			msi->msiir_offset = features->msiir_offset +  in fsl_of_msi_probe()
461 			msi->msiir_offset = msiir.start & MSIIR_OFFSET_MASK;  in fsl_of_msi_probe()
464 	msi->feature = features->fsl_pic_ip;  in fsl_of_msi_probe()
469 		msi->feature |= MSI_HW_ERRATA_ENDIAN;  in fsl_of_msi_probe()
473 	 * that have an "fsl,msi" property.  in fsl_of_msi_probe()
475 	msi->phandle = dev->dev.of_node->phandle;  in fsl_of_msi_probe()
477 	err = fsl_msi_init_allocator(msi);  in fsl_of_msi_probe()
479 		dev_err(&dev->dev, "Error allocating MSI bitmap\n");  in fsl_of_msi_probe()
483 	p = of_get_property(dev->dev.of_node, "msi-available-ranges", &len);  in fsl_of_msi_probe()
485 	if (of_device_is_compatible(dev->dev.of_node, "fsl,mpic-msi-v4.3") ||  in fsl_of_msi_probe()
486 	    of_device_is_compatible(dev->dev.of_node, "fsl,vmpic-msi-v4.3")) {  in fsl_of_msi_probe()
487 		msi->srs_shift = MSIIR1_SRS_SHIFT;  in fsl_of_msi_probe()
488 		msi->ibs_shift = MSIIR1_IBS_SHIFT;  in fsl_of_msi_probe()
490 			dev_warn(&dev->dev, "%s: dose not support msi-available-ranges property\n",  in fsl_of_msi_probe()
495 			err = fsl_msi_setup_hwirq(msi, dev,  in fsl_of_msi_probe()
504 		msi->srs_shift = MSIIR_SRS_SHIFT;  in fsl_of_msi_probe()
505 		msi->ibs_shift = MSIIR_IBS_SHIFT;  in fsl_of_msi_probe()
508 			dev_err(&dev->dev, "%s: Malformed msi-available-ranges property\n",  in fsl_of_msi_probe()
522 				pr_warn("%s: %pOF: msi available range of %u at %u is not IRQ-aligned\n",  in fsl_of_msi_probe()
533 				err = fsl_msi_setup_hwirq(msi, dev, offset + j,  in fsl_of_msi_probe()
541 	list_add_tail(&msi->list, &msi_head);  in fsl_of_msi_probe()
544 	 * Apply the MSI ops to all the controllers.  in fsl_of_msi_probe()
546 	 * but bail out if we find another MSI driver.  in fsl_of_msi_probe()
553 			dev_err(&dev->dev, "Different MSI driver already installed!\n");  in fsl_of_msi_probe()
581 		.compatible = "fsl,mpic-msi",
585 		.compatible = "fsl,mpic-msi-v4.3",
589 		.compatible = "fsl,ipic-msi",
594 		.compatible = "fsl,vmpic-msi",
598 		.compatible = "fsl,vmpic-msi-v4.3",
607 		.name = "fsl-msi",