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PCI: dwc: Replace magic number by defines 

Replace magic numbers by a self-explained define to ease human
comprehension.

Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Jingoo Han <jingoohan1@gmail.com>
Acked-by: Joao Pinto <jpinto@synopsys.com>
This commit is contained in:
Gustavo Pimentel 2018-05-14 16:09:50 +01:00 committed by Lorenzo Pieralisi
parent 6995de2168
commit 76cbf066b1
2 changed files with 21 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
drivers/pci/dwc/pcie-designware-host.c
View File

@ -83,18 +83,23 @@ irqreturn_t dw_handle_msi_irq(struct pcie_port *pp)
num_ctrls = pp->num_vectors / MAX_MSI_IRQS_PER_CTRL;
for (i = 0; i < num_ctrls; i++) {
dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_STATUS + i * 12, 4,
&val);
dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_STATUS +
(i * MSI_REG_CTRL_BLOCK_SIZE),
4, &val);
if (!val)
continue;
ret = IRQ_HANDLED;
pos = 0;
while ((pos = find_next_bit((unsigned long *) &val, 32,
pos)) != 32) {
irq = irq_find_mapping(pp->irq_domain, i * 32 + pos);
while ((pos = find_next_bit((unsigned long *) &val,
MAX_MSI_IRQS_PER_CTRL,
pos)) != MAX_MSI_IRQS_PER_CTRL) {
irq = irq_find_mapping(pp->irq_domain,
(i * MAX_MSI_IRQS_PER_CTRL) +
pos);
generic_handle_irq(irq);
dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_STATUS + i * 12,
dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_STATUS +
(i * MSI_REG_CTRL_BLOCK_SIZE),
4, 1 << pos);
pos++;
}
@ -157,9 +162,9 @@ static void dw_pci_bottom_mask(struct irq_data *data)
if (pp->ops->msi_clear_irq) {
pp->ops->msi_clear_irq(pp, data->hwirq);
} else {
ctrl = data->hwirq / 32;
res = ctrl * 12;
bit = data->hwirq % 32;
ctrl = data->hwirq / MAX_MSI_IRQS_PER_CTRL;
res = ctrl * MSI_REG_CTRL_BLOCK_SIZE;
bit = data->hwirq % MAX_MSI_IRQS_PER_CTRL;
pp->irq_status[ctrl] &= ~(1 << bit);
dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4,
@ -180,9 +185,9 @@ static void dw_pci_bottom_unmask(struct irq_data *data)
if (pp->ops->msi_set_irq) {
pp->ops->msi_set_irq(pp, data->hwirq);
} else {
ctrl = data->hwirq / 32;
res = ctrl * 12;
bit = data->hwirq % 32;
ctrl = data->hwirq / MAX_MSI_IRQS_PER_CTRL;
res = ctrl * MSI_REG_CTRL_BLOCK_SIZE;
bit = data->hwirq % MAX_MSI_IRQS_PER_CTRL;
pp->irq_status[ctrl] |= 1 << bit;
dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4,
@ -652,8 +657,9 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
/* Initialize IRQ Status array */
for (ctrl = 0; ctrl < num_ctrls; ctrl++)
dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_ENABLE + (ctrl * 12), 4,
&pp->irq_status[ctrl]);
dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_ENABLE +
(ctrl * MSI_REG_CTRL_BLOCK_SIZE),
4, &pp->irq_status[ctrl]);
/* Setup RC BARs */
dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, 0x00000004);

1
drivers/pci/dwc/pcie-designware.h
View File

@ -110,6 +110,7 @@
#define MAX_MSI_IRQS 256
#define MAX_MSI_IRQS_PER_CTRL 32
#define MAX_MSI_CTRLS (MAX_MSI_IRQS / MAX_MSI_IRQS_PER_CTRL)
#define MSI_REG_CTRL_BLOCK_SIZE 12
#define MSI_DEF_NUM_VECTORS 32
/* Maximum number of inbound/outbound iATUs */