Lines Matching defs:msi
14 #include <linux/msi.h>
41 static inline void msi_writel(struct altera_msi *msi, const u32 value,
44 writel_relaxed(value, msi->csr_base + reg);
47 static inline u32 msi_readl(struct altera_msi *msi, const u32 reg)
49 return readl_relaxed(msi->csr_base + reg);
55 struct altera_msi *msi;
61 msi = irq_desc_get_handler_data(desc);
63 while ((status = msi_readl(msi, MSI_STATUS)) != 0) {
64 for_each_set_bit(bit, &status, msi->num_of_vectors) {
66 readl_relaxed(msi->vector_base + (bit * sizeof(u32)));
68 virq = irq_find_mapping(msi->inner_domain, bit);
72 dev_err(&msi->pdev->dev, "unexpected MSI\n");
93 struct altera_msi *msi = irq_data_get_irq_chip_data(data);
94 phys_addr_t addr = msi->vector_phy + (data->hwirq * sizeof(u32));
100 dev_dbg(&msi->pdev->dev, "msi#%d address_hi %#x address_lo %#x\n",
119 struct altera_msi *msi = domain->host_data;
124 mutex_lock(&msi->lock);
126 bit = find_first_zero_bit(msi->used, msi->num_of_vectors);
127 if (bit >= msi->num_of_vectors) {
128 mutex_unlock(&msi->lock);
132 set_bit(bit, msi->used);
134 mutex_unlock(&msi->lock);
140 mask = msi_readl(msi, MSI_INTMASK);
142 msi_writel(msi, mask, MSI_INTMASK);
151 struct altera_msi *msi = irq_data_get_irq_chip_data(d);
154 mutex_lock(&msi->lock);
156 if (!test_bit(d->hwirq, msi->used)) {
157 dev_err(&msi->pdev->dev, "trying to free unused MSI#%lu\n",
160 __clear_bit(d->hwirq, msi->used);
161 mask = msi_readl(msi, MSI_INTMASK);
163 msi_writel(msi, mask, MSI_INTMASK);
166 mutex_unlock(&msi->lock);
174 static int altera_allocate_domains(struct altera_msi *msi)
176 struct fwnode_handle *fwnode = of_node_to_fwnode(msi->pdev->dev.of_node);
178 msi->inner_domain = irq_domain_add_linear(NULL, msi->num_of_vectors,
179 &msi_domain_ops, msi);
180 if (!msi->inner_domain) {
181 dev_err(&msi->pdev->dev, "failed to create IRQ domain\n");
185 msi->msi_domain = pci_msi_create_irq_domain(fwnode,
186 &altera_msi_domain_info, msi->inner_domain);
187 if (!msi->msi_domain) {
188 dev_err(&msi->pdev->dev, "failed to create MSI domain\n");
189 irq_domain_remove(msi->inner_domain);
196 static void altera_free_domains(struct altera_msi *msi)
198 irq_domain_remove(msi->msi_domain);
199 irq_domain_remove(msi->inner_domain);
204 struct altera_msi *msi = platform_get_drvdata(pdev);
206 msi_writel(msi, 0, MSI_INTMASK);
207 irq_set_chained_handler(msi->irq, NULL);
208 irq_set_handler_data(msi->irq, NULL);
210 altera_free_domains(msi);
218 struct altera_msi *msi;
223 msi = devm_kzalloc(&pdev->dev, sizeof(struct altera_msi),
225 if (!msi)
228 mutex_init(&msi->lock);
229 msi->pdev = pdev;
231 msi->csr_base = devm_platform_ioremap_resource_byname(pdev, "csr");
232 if (IS_ERR(msi->csr_base)) {
234 return PTR_ERR(msi->csr_base);
239 msi->vector_base = devm_ioremap_resource(&pdev->dev, res);
240 if (IS_ERR(msi->vector_base)) {
242 return PTR_ERR(msi->vector_base);
245 msi->vector_phy = res->start;
247 if (of_property_read_u32(np, "num-vectors", &msi->num_of_vectors)) {
252 ret = altera_allocate_domains(msi);
256 msi->irq = platform_get_irq(pdev, 0);
257 if (msi->irq < 0) {
258 ret = msi->irq;
262 irq_set_chained_handler_and_data(msi->irq, altera_msi_isr, msi);
263 platform_set_drvdata(pdev, msi);
273 { .compatible = "altr,msi-1.0", NULL },
279 .name = "altera-msi",