From e8817de7fbfca407f4f47da050d12b10fece5706 Mon Sep 17 00:00:00 2001 From: Gustavo Pimentel Date: Thu, 19 Jul 2018 10:32:17 +0200 Subject: pci-epf-test/pci_endpoint_test: Cleanup PCI_ENDPOINT_TEST memspace Cleanup PCI_ENDPOINT_TEST memspace (by moving the interrupt number away from command section). Add IRQ_TYPE register to identify the triggered ID interrupt required for the READ/WRITE/COPY tests and raise IRQ test commands. Update documentation accordingly. Signed-off-by: Gustavo Pimentel Signed-off-by: Lorenzo Pieralisi Acked-by: Kishon Vijay Abraham I --- drivers/pci/endpoint/functions/pci-epf-test.c | 61 ++++++++++++++++++--------- 1 file changed, 41 insertions(+), 20 deletions(-) (limited to 'drivers/pci/endpoint') diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c index 63ed706445b9..db4b23672004 100644 --- a/drivers/pci/endpoint/functions/pci-epf-test.c +++ b/drivers/pci/endpoint/functions/pci-epf-test.c @@ -18,13 +18,15 @@ #include #include +#define IRQ_TYPE_LEGACY 0 +#define IRQ_TYPE_MSI 1 + #define COMMAND_RAISE_LEGACY_IRQ BIT(0) #define COMMAND_RAISE_MSI_IRQ BIT(1) -#define MSI_NUMBER_SHIFT 2 -#define MSI_NUMBER_MASK (0x3f << MSI_NUMBER_SHIFT) -#define COMMAND_READ BIT(8) -#define COMMAND_WRITE BIT(9) -#define COMMAND_COPY BIT(10) +/* BIT(2) is reserved for raising MSI-X IRQ command */ +#define COMMAND_READ BIT(3) +#define COMMAND_WRITE BIT(4) +#define COMMAND_COPY BIT(5) #define STATUS_READ_SUCCESS BIT(0) #define STATUS_READ_FAIL BIT(1) @@ -56,6 +58,8 @@ struct pci_epf_test_reg { u64 dst_addr; u32 size; u32 checksum; + u32 irq_type; + u32 irq_number; } __packed; static struct pci_epf_header test_header = { @@ -244,31 +248,39 @@ err: return ret; } -static void pci_epf_test_raise_irq(struct pci_epf_test *epf_test, u8 irq) +static void pci_epf_test_raise_irq(struct pci_epf_test *epf_test, u8 irq_type, + u16 irq) { - u8 msi_count; struct pci_epf *epf = epf_test->epf; + struct device *dev = &epf->dev; struct pci_epc *epc = epf->epc; enum pci_barno test_reg_bar = epf_test->test_reg_bar; struct pci_epf_test_reg *reg = epf_test->reg[test_reg_bar]; reg->status |= STATUS_IRQ_RAISED; - msi_count = pci_epc_get_msi(epc, epf->func_no); - if (irq > msi_count || msi_count <= 0) + + switch (irq_type) { + case IRQ_TYPE_LEGACY: pci_epc_raise_irq(epc, epf->func_no, PCI_EPC_IRQ_LEGACY, 0); - else + break; + case IRQ_TYPE_MSI: pci_epc_raise_irq(epc, epf->func_no, PCI_EPC_IRQ_MSI, irq); + break; + default: + dev_err(dev, "Failed to raise IRQ, unknown type\n"); + break; + } } static void pci_epf_test_cmd_handler(struct work_struct *work) { int ret; - u8 irq; - u8 msi_count; + int count; u32 command; struct pci_epf_test *epf_test = container_of(work, struct pci_epf_test, cmd_handler.work); struct pci_epf *epf = epf_test->epf; + struct device *dev = &epf->dev; struct pci_epc *epc = epf->epc; enum pci_barno test_reg_bar = epf_test->test_reg_bar; struct pci_epf_test_reg *reg = epf_test->reg[test_reg_bar]; @@ -280,7 +292,10 @@ static void pci_epf_test_cmd_handler(struct work_struct *work) reg->command = 0; reg->status = 0; - irq = (command & MSI_NUMBER_MASK) >> MSI_NUMBER_SHIFT; + if (reg->irq_type > IRQ_TYPE_MSI) { + dev_err(dev, "Failed to detect IRQ type\n"); + goto reset_handler; + } if (command & COMMAND_RAISE_LEGACY_IRQ) { reg->status = STATUS_IRQ_RAISED; @@ -294,7 +309,8 @@ static void pci_epf_test_cmd_handler(struct work_struct *work) reg->status |= STATUS_WRITE_FAIL; else reg->status |= STATUS_WRITE_SUCCESS; - pci_epf_test_raise_irq(epf_test, irq); + pci_epf_test_raise_irq(epf_test, reg->irq_type, + reg->irq_number); goto reset_handler; } @@ -304,7 +320,8 @@ static void pci_epf_test_cmd_handler(struct work_struct *work) reg->status |= STATUS_READ_SUCCESS; else reg->status |= STATUS_READ_FAIL; - pci_epf_test_raise_irq(epf_test, irq); + pci_epf_test_raise_irq(epf_test, reg->irq_type, + reg->irq_number); goto reset_handler; } @@ -314,16 +331,18 @@ static void pci_epf_test_cmd_handler(struct work_struct *work) reg->status |= STATUS_COPY_SUCCESS; else reg->status |= STATUS_COPY_FAIL; - pci_epf_test_raise_irq(epf_test, irq); + pci_epf_test_raise_irq(epf_test, reg->irq_type, + reg->irq_number); goto reset_handler; } if (command & COMMAND_RAISE_MSI_IRQ) { - msi_count = pci_epc_get_msi(epc, epf->func_no); - if (irq > msi_count || msi_count <= 0) + count = pci_epc_get_msi(epc, epf->func_no); + if (reg->irq_number > count || count <= 0) goto reset_handler; reg->status = STATUS_IRQ_RAISED; - pci_epc_raise_irq(epc, epf->func_no, PCI_EPC_IRQ_MSI, irq); + pci_epc_raise_irq(epc, epf->func_no, PCI_EPC_IRQ_MSI, + reg->irq_number); goto reset_handler; } @@ -457,8 +476,10 @@ static int pci_epf_test_bind(struct pci_epf *epf) return ret; ret = pci_epc_set_msi(epc, epf->func_no, epf->msi_interrupts); - if (ret) + if (ret) { + dev_err(dev, "MSI configuration failed\n"); return ret; + } if (!epf_test->linkup_notifier) queue_work(kpcitest_workqueue, &epf_test->cmd_handler.work); -- cgit v1.2.3-59-g8ed1b