6  * Copyright (C) 2005-2009, 2010 Cavium Networks
15 #include <asm/octeon/cvmx-npi-defs.h>
16 #include <asm/octeon/cvmx-pci-defs.h>
17 #include <asm/octeon/cvmx-npei-defs.h>
18 #include <asm/octeon/cvmx-sli-defs.h>
19 #include <asm/octeon/cvmx-pexp-defs.h>
20 #include <asm/octeon/pci-octeon.h>
29  * Each bit in msi_multiple_irq_bitmask tells that the device using
31  * is used so we can disable all of the MSI interrupts when a device
49  * arch_setup_msi_irq() - setup MSI IRQs for a device
50  * @dev:    Device requesting MSI interrupts
54  * legacy INT A-D. This routine will allocate multiple interrupts
55  * for MSI devices that support them. A device can override this by
59  * Return: %0 on success, non-%0 on error.
67 	int irq = 0;  in arch_setup_msi_irq()  local
72 	if (desc->pci.msi_attrib.is_msix)  in arch_setup_msi_irq()
73 		return -EINVAL;  in arch_setup_msi_irq()
76 	 * Read the MSI config to figure out how many IRQs this device  in arch_setup_msi_irq()
80 	pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &control);  in arch_setup_msi_irq()
103 	 * interrupts. If this device asks for more, only give it one.  in arch_setup_msi_irq()
115 	/* Mask with one bit for each IRQ */  in arch_setup_msi_irq()
116 	search_mask = (1 << irq_step) - 1;  in arch_setup_msi_irq()
125 		for (irq = 0; irq < 64; irq += irq_step) {  in arch_setup_msi_irq()
126 			if ((msi_free_irq_bitmask[index] & (search_mask << irq)) == 0) {  in arch_setup_msi_irq()
127 				msi_free_irq_bitmask[index] |= search_mask << irq;  in arch_setup_msi_irq()
128 				msi_multiple_irq_bitmask[index] |= (search_mask >> 1) << irq;  in arch_setup_msi_irq()
137 	if (irq >= 64) {  in arch_setup_msi_irq()
147 	/* MSI interrupts start at logical IRQ OCTEON_IRQ_MSI_BIT0 */  in arch_setup_msi_irq()
148 	irq += index*64;  in arch_setup_msi_irq()
149 	irq += OCTEON_IRQ_MSI_BIT0;  in arch_setup_msi_irq()
177 	msg.data = irq - OCTEON_IRQ_MSI_BIT0;  in arch_setup_msi_irq()
179 	/* Update the number of IRQs the device has available to it */  in arch_setup_msi_irq()
182 	pci_write_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, control);  in arch_setup_msi_irq()
184 	irq_set_msi_desc(irq, desc);  in arch_setup_msi_irq()
185 	pci_write_msi_msg(irq, &msg);  in arch_setup_msi_irq()
190  * arch_teardown_msi_irq() - release MSI IRQs for a device
191  * @irq:    The devices first irq number. There may be multiple in sequence.
193  * Called when a device no longer needs its MSI interrupts. All
194  * MSI interrupts for the device are freed.
196 void arch_teardown_msi_irq(unsigned int irq)  in arch_teardown_msi_irq()  argument
203 	if ((irq < OCTEON_IRQ_MSI_BIT0)  in arch_teardown_msi_irq()
204 		|| (irq > msi_irq_size + OCTEON_IRQ_MSI_BIT0))  in arch_teardown_msi_irq()
206 		      "MSI interrupt (%d)", irq);  in arch_teardown_msi_irq()
208 	irq -= OCTEON_IRQ_MSI_BIT0;  in arch_teardown_msi_irq()
209 	index = irq / 64;  in arch_teardown_msi_irq()
210 	irq0 = irq % 64;  in arch_teardown_msi_irq()
215 	 * IRQ is also owned by this device.  in arch_teardown_msi_irq()
223 	/* Mask with one bit for each IRQ */  in arch_teardown_msi_irq()
224 	bitmask = (1 << number_irqs) - 1;  in arch_teardown_msi_irq()
229 		      "interrupt (%d) not in use", irq);  in arch_teardown_msi_irq()
247 	int msi_number = data->irq - OCTEON_IRQ_MSI_BIT0;  in octeon_irq_msi_enable_pcie()
263 	int msi_number = data->irq - OCTEON_IRQ_MSI_BIT0;  in octeon_irq_msi_disable_pcie()
309 	int irq;  in __octeon_msi_do_interrupt()  local
314 		bit--;  in __octeon_msi_do_interrupt()
318 		irq = bit + OCTEON_IRQ_MSI_BIT0 + 64 * index;  in __octeon_msi_do_interrupt()
319 		do_IRQ(irq);  in __octeon_msi_do_interrupt()
333  * Create octeon_msi_interrupt{0-3} function body
345 	int irq;  in octeon_msi_initialize()  local
373 	for (irq = OCTEON_IRQ_MSI_BIT0; irq <= OCTEON_IRQ_MSI_LAST; irq++)  in octeon_msi_initialize()
374 		irq_set_chip_and_handler(irq, msi, handle_simple_irq);  in octeon_msi_initialize()