From cadfd8987af0e3d5dd74254a302d019a3b369d2d Mon Sep 17 00:00:00 2001 From: Gilad Ben-Yossef Date: Thu, 18 Apr 2019 16:38:40 +0300 Subject: [PATCH] crypto: ccree - add CPP completion handling Add the logic needed to track and report CPP operation rejection. The new logic will be used by the CPP feature introduced later. Signed-off-by: Gilad Ben-Yossef Signed-off-by: Herbert Xu --- drivers/crypto/ccree/cc_crypto_ctx.h | 8 ++ drivers/crypto/ccree/cc_driver.c | 25 +++++-- drivers/crypto/ccree/cc_driver.h | 28 +++++++ drivers/crypto/ccree/cc_host_regs.h | 75 ++++++++++++++++++- drivers/crypto/ccree/cc_request_mgr.c | 101 +++++++++++++++++++------- 5 files changed, 199 insertions(+), 38 deletions(-) diff --git a/drivers/crypto/ccree/cc_crypto_ctx.h b/drivers/crypto/ccree/cc_crypto_ctx.h index c8dac273c563..97e56e9af01e 100644 --- a/drivers/crypto/ccree/cc_crypto_ctx.h +++ b/drivers/crypto/ccree/cc_crypto_ctx.h @@ -55,6 +55,14 @@ #define CC_DRV_ALG_MAX_BLOCK_SIZE CC_HASH_BLOCK_SIZE_MAX +#define CC_CPP_NUM_SLOTS 8 +#define CC_CPP_NUM_ALGS 2 + +enum cc_cpp_alg { + CC_CPP_SM4 = 1, + CC_CPP_AES = 0 +}; + enum drv_engine_type { DRV_ENGINE_NULL = 0, DRV_ENGINE_AES = 1, diff --git a/drivers/crypto/ccree/cc_driver.c b/drivers/crypto/ccree/cc_driver.c index 255d2367bfa8..1cded418f223 100644 --- a/drivers/crypto/ccree/cc_driver.c +++ b/drivers/crypto/ccree/cc_driver.c @@ -118,12 +118,12 @@ static irqreturn_t cc_isr(int irq, void *dev_id) drvdata->irq = irr; /* Completion interrupt - most probable */ - if (irr & CC_COMP_IRQ_MASK) { - /* Mask AXI completion interrupt - will be unmasked in - * Deferred service handler + if (irr & drvdata->comp_mask) { + /* Mask all completion interrupts - will be unmasked in + * deferred service handler */ - cc_iowrite(drvdata, CC_REG(HOST_IMR), imr | CC_COMP_IRQ_MASK); - irr &= ~CC_COMP_IRQ_MASK; + cc_iowrite(drvdata, CC_REG(HOST_IMR), imr | drvdata->comp_mask); + irr &= ~drvdata->comp_mask; complete_request(drvdata); } #ifdef CONFIG_CRYPTO_FIPS @@ -175,7 +175,7 @@ int init_cc_regs(struct cc_drvdata *drvdata, bool is_probe) cc_iowrite(drvdata, CC_REG(HOST_ICR), val); /* Unmask relevant interrupt cause */ - val = CC_COMP_IRQ_MASK | CC_AXI_ERR_IRQ_MASK; + val = drvdata->comp_mask | CC_AXI_ERR_IRQ_MASK; if (drvdata->hw_rev >= CC_HW_REV_712) val |= CC_GPR0_IRQ_MASK; @@ -235,6 +235,8 @@ static int init_cc_resources(struct platform_device *plat_dev) new_drvdata->ver_offset = CC_REG(HOST_VERSION_630); } + new_drvdata->comp_mask = CC_COMP_IRQ_MASK; + platform_set_drvdata(plat_dev, new_drvdata); new_drvdata->plat_dev = plat_dev; @@ -315,6 +317,8 @@ static int init_cc_resources(struct platform_device *plat_dev) return rc; } + new_drvdata->sec_disabled = cc_sec_disable; + if (hw_rev->rev <= CC_HW_REV_712) { /* Verify correct mapping */ val = cc_ioread(new_drvdata, new_drvdata->sig_offset); @@ -328,10 +332,15 @@ static int init_cc_resources(struct platform_device *plat_dev) } else { val = cc_ioread(new_drvdata, CC_REG(SECURITY_DISABLED)); val &= CC_SECURITY_DISABLED_MASK; - new_drvdata->sec_disabled = !!val; + new_drvdata->sec_disabled |= !!val; + + if (!new_drvdata->sec_disabled) { + new_drvdata->comp_mask |= CC_CPP_SM4_ABORT_MASK; + if (new_drvdata->std_bodies & CC_STD_NIST) + new_drvdata->comp_mask |= CC_CPP_AES_ABORT_MASK; + } } - new_drvdata->sec_disabled |= cc_sec_disable; if (new_drvdata->sec_disabled) dev_info(dev, "Security Disabled mode is in effect. Security functions disabled.\n"); diff --git a/drivers/crypto/ccree/cc_driver.h b/drivers/crypto/ccree/cc_driver.h index ff474891221e..e10ab9c940e4 100644 --- a/drivers/crypto/ccree/cc_driver.h +++ b/drivers/crypto/ccree/cc_driver.h @@ -71,6 +71,26 @@ enum cc_std_body { CC_AXIM_MON_COMP_VALUE_BIT_SHIFT, \ CC_AXIM_MON_COMP_VALUE_BIT_SHIFT) +#define CC_CPP_AES_ABORT_MASK ( \ + BIT(CC_HOST_IMR_REE_OP_ABORTED_AES_0_MASK_BIT_SHIFT) | \ + BIT(CC_HOST_IMR_REE_OP_ABORTED_AES_1_MASK_BIT_SHIFT) | \ + BIT(CC_HOST_IMR_REE_OP_ABORTED_AES_2_MASK_BIT_SHIFT) | \ + BIT(CC_HOST_IMR_REE_OP_ABORTED_AES_3_MASK_BIT_SHIFT) | \ + BIT(CC_HOST_IMR_REE_OP_ABORTED_AES_4_MASK_BIT_SHIFT) | \ + BIT(CC_HOST_IMR_REE_OP_ABORTED_AES_5_MASK_BIT_SHIFT) | \ + BIT(CC_HOST_IMR_REE_OP_ABORTED_AES_6_MASK_BIT_SHIFT) | \ + BIT(CC_HOST_IMR_REE_OP_ABORTED_AES_7_MASK_BIT_SHIFT)) + +#define CC_CPP_SM4_ABORT_MASK ( \ + BIT(CC_HOST_IMR_REE_OP_ABORTED_SM_0_MASK_BIT_SHIFT) | \ + BIT(CC_HOST_IMR_REE_OP_ABORTED_SM_1_MASK_BIT_SHIFT) | \ + BIT(CC_HOST_IMR_REE_OP_ABORTED_SM_2_MASK_BIT_SHIFT) | \ + BIT(CC_HOST_IMR_REE_OP_ABORTED_SM_3_MASK_BIT_SHIFT) | \ + BIT(CC_HOST_IMR_REE_OP_ABORTED_SM_4_MASK_BIT_SHIFT) | \ + BIT(CC_HOST_IMR_REE_OP_ABORTED_SM_5_MASK_BIT_SHIFT) | \ + BIT(CC_HOST_IMR_REE_OP_ABORTED_SM_6_MASK_BIT_SHIFT) | \ + BIT(CC_HOST_IMR_REE_OP_ABORTED_SM_7_MASK_BIT_SHIFT)) + /* Register name mangling macro */ #define CC_REG(reg_name) CC_ ## reg_name ## _REG_OFFSET @@ -92,6 +112,12 @@ enum cc_std_body { * field in the HW descriptor. The DMA engine +8 that value. */ +struct cc_cpp_req { + bool is_cpp; + enum cc_cpp_alg alg; + u8 slot; +}; + #define CC_MAX_IVGEN_DMA_ADDRESSES 3 struct cc_crypto_req { void (*user_cb)(struct device *dev, void *req, int err); @@ -106,6 +132,7 @@ struct cc_crypto_req { /* The generated IV size required, 8/16 B allowed. */ unsigned int ivgen_size; struct completion seq_compl; /* request completion */ + struct cc_cpp_req cpp; }; /** @@ -139,6 +166,7 @@ struct cc_drvdata { u32 ver_offset; int std_bodies; bool sec_disabled; + u32 comp_mask; }; struct cc_crypto_alg { diff --git a/drivers/crypto/ccree/cc_host_regs.h b/drivers/crypto/ccree/cc_host_regs.h index c1be372a5bfe..6124b97680ac 100644 --- a/drivers/crypto/ccree/cc_host_regs.h +++ b/drivers/crypto/ccree/cc_host_regs.h @@ -7,33 +7,102 @@ // -------------------------------------- // BLOCK: HOST_P // -------------------------------------- + + +/* IRR */ #define CC_HOST_IRR_REG_OFFSET 0xA00UL +#define CC_HOST_IRR_REE_OP_ABORTED_AES_0_INT_BIT_SHIFT 0x1UL +#define CC_HOST_IRR_REE_OP_ABORTED_AES_0_INT_BIT_SIZE 0x1UL #define CC_HOST_IRR_DSCRPTR_COMPLETION_LOW_INT_BIT_SHIFT 0x2UL #define CC_HOST_IRR_DSCRPTR_COMPLETION_LOW_INT_BIT_SIZE 0x1UL +#define CC_HOST_IRR_REE_OP_ABORTED_AES_1_INT_BIT_SHIFT 0x3UL +#define CC_HOST_IRR_REE_OP_ABORTED_AES_1_INT_BIT_SIZE 0x1UL +#define CC_HOST_IRR_REE_OP_ABORTED_AES_2_INT_BIT_SHIFT 0x4UL +#define CC_HOST_IRR_REE_OP_ABORTED_AES_2_INT_BIT_SIZE 0x1UL +#define CC_HOST_IRR_REE_OP_ABORTED_AES_3_INT_BIT_SHIFT 0x5UL +#define CC_HOST_IRR_REE_OP_ABORTED_AES_3_INT_BIT_SIZE 0x1UL +#define CC_HOST_IRR_REE_OP_ABORTED_AES_4_INT_BIT_SHIFT 0x6UL +#define CC_HOST_IRR_REE_OP_ABORTED_AES_4_INT_BIT_SIZE 0x1UL +#define CC_HOST_IRR_REE_OP_ABORTED_AES_5_INT_BIT_SHIFT 0x7UL +#define CC_HOST_IRR_REE_OP_ABORTED_AES_5_INT_BIT_SIZE 0x1UL #define CC_HOST_IRR_AXI_ERR_INT_BIT_SHIFT 0x8UL #define CC_HOST_IRR_AXI_ERR_INT_BIT_SIZE 0x1UL +#define CC_HOST_IRR_REE_OP_ABORTED_AES_6_INT_BIT_SHIFT 0x9UL +#define CC_HOST_IRR_REE_OP_ABORTED_AES_6_INT_BIT_SIZE 0x1UL +#define CC_HOST_IRR_REE_OP_ABORTED_AES_7_INT_BIT_SHIFT 0xAUL +#define CC_HOST_IRR_REE_OP_ABORTED_AES_7_INT_BIT_SIZE 0x1UL #define CC_HOST_IRR_GPR0_BIT_SHIFT 0xBUL #define CC_HOST_IRR_GPR0_BIT_SIZE 0x1UL +#define CC_HOST_IRR_REE_OP_ABORTED_SM_0_INT_BIT_SHIFT 0xCUL +#define CC_HOST_IRR_REE_OP_ABORTED_SM_0_INT_BIT_SIZE 0x1UL +#define CC_HOST_IRR_REE_OP_ABORTED_SM_1_INT_BIT_SHIFT 0xDUL +#define CC_HOST_IRR_REE_OP_ABORTED_SM_1_INT_BIT_SIZE 0x1UL +#define CC_HOST_IRR_REE_OP_ABORTED_SM_2_INT_BIT_SHIFT 0xEUL +#define CC_HOST_IRR_REE_OP_ABORTED_SM_2_INT_BIT_SIZE 0x1UL +#define CC_HOST_IRR_REE_OP_ABORTED_SM_3_INT_BIT_SHIFT 0xFUL +#define CC_HOST_IRR_REE_OP_ABORTED_SM_3_INT_BIT_SIZE 0x1UL +#define CC_HOST_IRR_REE_OP_ABORTED_SM_4_INT_BIT_SHIFT 0x10UL +#define CC_HOST_IRR_REE_OP_ABORTED_SM_4_INT_BIT_SIZE 0x1UL +#define CC_HOST_IRR_REE_OP_ABORTED_SM_5_INT_BIT_SHIFT 0x11UL +#define CC_HOST_IRR_REE_OP_ABORTED_SM_5_INT_BIT_SIZE 0x1UL +#define CC_HOST_IRR_REE_OP_ABORTED_SM_6_INT_BIT_SHIFT 0x12UL +#define CC_HOST_IRR_REE_OP_ABORTED_SM_6_INT_BIT_SIZE 0x1UL #define CC_HOST_IRR_DSCRPTR_WATERMARK_INT_BIT_SHIFT 0x13UL #define CC_HOST_IRR_DSCRPTR_WATERMARK_INT_BIT_SIZE 0x1UL +#define CC_HOST_IRR_REE_OP_ABORTED_SM_7_INT_BIT_SHIFT 0x14UL +#define CC_HOST_IRR_REE_OP_ABORTED_SM_7_INT_BIT_SIZE 0x1UL #define CC_HOST_IRR_AXIM_COMP_INT_BIT_SHIFT 0x17UL #define CC_HOST_IRR_AXIM_COMP_INT_BIT_SIZE 0x1UL #define CC_HOST_SEP_SRAM_THRESHOLD_REG_OFFSET 0xA10UL #define CC_HOST_SEP_SRAM_THRESHOLD_VALUE_BIT_SHIFT 0x0UL #define CC_HOST_SEP_SRAM_THRESHOLD_VALUE_BIT_SIZE 0xCUL -#define CC_HOST_IMR_REG_OFFSET 0xA04UL -#define CC_HOST_IMR_NOT_USED_MASK_BIT_SHIFT 0x1UL -#define CC_HOST_IMR_NOT_USED_MASK_BIT_SIZE 0x1UL + +/* IMR */ +#define CC_HOST_IMR_REG_OFFSET 0x0A04UL +#define CC_HOST_IMR_REE_OP_ABORTED_AES_0_MASK_BIT_SHIFT 0x1UL +#define CC_HOST_IMR_REE_OP_ABORTED_AES_0_MASK_BIT_SIZE 0x1UL #define CC_HOST_IMR_DSCRPTR_COMPLETION_MASK_BIT_SHIFT 0x2UL #define CC_HOST_IMR_DSCRPTR_COMPLETION_MASK_BIT_SIZE 0x1UL +#define CC_HOST_IMR_REE_OP_ABORTED_AES_1_MASK_BIT_SHIFT 0x3UL +#define CC_HOST_IMR_REE_OP_ABORTED_AES_1_MASK_BIT_SIZE 0x1UL +#define CC_HOST_IMR_REE_OP_ABORTED_AES_2_MASK_BIT_SHIFT 0x4UL +#define CC_HOST_IMR_REE_OP_ABORTED_AES_2_MASK_BIT_SIZE 0x1UL +#define CC_HOST_IMR_REE_OP_ABORTED_AES_3_MASK_BIT_SHIFT 0x5UL +#define CC_HOST_IMR_REE_OP_ABORTED_AES_3_MASK_BIT_SIZE 0x1UL +#define CC_HOST_IMR_REE_OP_ABORTED_AES_4_MASK_BIT_SHIFT 0x6UL +#define CC_HOST_IMR_REE_OP_ABORTED_AES_4_MASK_BIT_SIZE 0x1UL +#define CC_HOST_IMR_REE_OP_ABORTED_AES_5_MASK_BIT_SHIFT 0x7UL +#define CC_HOST_IMR_REE_OP_ABORTED_AES_5_MASK_BIT_SIZE 0x1UL #define CC_HOST_IMR_AXI_ERR_MASK_BIT_SHIFT 0x8UL #define CC_HOST_IMR_AXI_ERR_MASK_BIT_SIZE 0x1UL +#define CC_HOST_IMR_REE_OP_ABORTED_AES_6_MASK_BIT_SHIFT 0x9UL +#define CC_HOST_IMR_REE_OP_ABORTED_AES_6_MASK_BIT_SIZE 0x1UL +#define CC_HOST_IMR_REE_OP_ABORTED_AES_7_MASK_BIT_SHIFT 0xAUL +#define CC_HOST_IMR_REE_OP_ABORTED_AES_7_MASK_BIT_SIZE 0x1UL #define CC_HOST_IMR_GPR0_BIT_SHIFT 0xBUL #define CC_HOST_IMR_GPR0_BIT_SIZE 0x1UL +#define CC_HOST_IMR_REE_OP_ABORTED_SM_0_MASK_BIT_SHIFT 0xCUL +#define CC_HOST_IMR_REE_OP_ABORTED_SM_0_MASK_BIT_SIZE 0x1UL +#define CC_HOST_IMR_REE_OP_ABORTED_SM_1_MASK_BIT_SHIFT 0xDUL +#define CC_HOST_IMR_REE_OP_ABORTED_SM_1_MASK_BIT_SIZE 0x1UL +#define CC_HOST_IMR_REE_OP_ABORTED_SM_2_MASK_BIT_SHIFT 0xEUL +#define CC_HOST_IMR_REE_OP_ABORTED_SM_2_MASK_BIT_SIZE 0x1UL +#define CC_HOST_IMR_REE_OP_ABORTED_SM_3_MASK_BIT_SHIFT 0xFUL +#define CC_HOST_IMR_REE_OP_ABORTED_SM_3_MASK_BIT_SIZE 0x1UL +#define CC_HOST_IMR_REE_OP_ABORTED_SM_4_MASK_BIT_SHIFT 0x10UL +#define CC_HOST_IMR_REE_OP_ABORTED_SM_4_MASK_BIT_SIZE 0x1UL +#define CC_HOST_IMR_REE_OP_ABORTED_SM_5_MASK_BIT_SHIFT 0x11UL +#define CC_HOST_IMR_REE_OP_ABORTED_SM_5_MASK_BIT_SIZE 0x1UL +#define CC_HOST_IMR_REE_OP_ABORTED_SM_6_MASK_BIT_SHIFT 0x12UL +#define CC_HOST_IMR_REE_OP_ABORTED_SM_6_MASK_BIT_SIZE 0x1UL #define CC_HOST_IMR_DSCRPTR_WATERMARK_MASK0_BIT_SHIFT 0x13UL #define CC_HOST_IMR_DSCRPTR_WATERMARK_MASK0_BIT_SIZE 0x1UL +#define CC_HOST_IMR_REE_OP_ABORTED_SM_7_MASK_BIT_SHIFT 0x14UL +#define CC_HOST_IMR_REE_OP_ABORTED_SM_7_MASK_BIT_SIZE 0x1UL #define CC_HOST_IMR_AXIM_COMP_INT_MASK_BIT_SHIFT 0x17UL #define CC_HOST_IMR_AXIM_COMP_INT_MASK_BIT_SIZE 0x1UL + +/* ICR */ #define CC_HOST_ICR_REG_OFFSET 0xA08UL #define CC_HOST_ICR_DSCRPTR_COMPLETION_BIT_SHIFT 0x2UL #define CC_HOST_ICR_DSCRPTR_COMPLETION_BIT_SIZE 0x1UL diff --git a/drivers/crypto/ccree/cc_request_mgr.c b/drivers/crypto/ccree/cc_request_mgr.c index 83a8aaae61c7..88c97a580dd8 100644 --- a/drivers/crypto/ccree/cc_request_mgr.c +++ b/drivers/crypto/ccree/cc_request_mgr.c @@ -2,6 +2,7 @@ /* Copyright (C) 2012-2018 ARM Limited or its affiliates. */ #include +#include #include "cc_driver.h" #include "cc_buffer_mgr.h" #include "cc_request_mgr.h" @@ -52,11 +53,38 @@ struct cc_bl_item { bool notif; }; +static const u32 cc_cpp_int_masks[CC_CPP_NUM_ALGS][CC_CPP_NUM_SLOTS] = { + { BIT(CC_HOST_IRR_REE_OP_ABORTED_AES_0_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_AES_1_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_AES_2_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_AES_3_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_AES_4_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_AES_5_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_AES_6_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_AES_7_INT_BIT_SHIFT) }, + { BIT(CC_HOST_IRR_REE_OP_ABORTED_SM_0_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_SM_1_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_SM_2_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_SM_3_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_SM_4_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_SM_5_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_SM_6_INT_BIT_SHIFT), + BIT(CC_HOST_IRR_REE_OP_ABORTED_SM_7_INT_BIT_SHIFT) } +}; + static void comp_handler(unsigned long devarg); #ifdef COMP_IN_WQ static void comp_work_handler(struct work_struct *work); #endif +static inline u32 cc_cpp_int_mask(enum cc_cpp_alg alg, int slot) +{ + alg = array_index_nospec(alg, CC_CPP_NUM_ALGS); + slot = array_index_nospec(slot, CC_CPP_NUM_SLOTS); + + return cc_cpp_int_masks[alg][slot]; +} + void cc_req_mgr_fini(struct cc_drvdata *drvdata) { struct cc_req_mgr_handle *req_mgr_h = drvdata->request_mgr_handle; @@ -579,6 +607,8 @@ static void proc_completions(struct cc_drvdata *drvdata) drvdata->request_mgr_handle; unsigned int *tail = &request_mgr_handle->req_queue_tail; unsigned int *head = &request_mgr_handle->req_queue_head; + int rc; + u32 mask; while (request_mgr_handle->axi_completed) { request_mgr_handle->axi_completed--; @@ -596,8 +626,22 @@ static void proc_completions(struct cc_drvdata *drvdata) cc_req = &request_mgr_handle->req_queue[*tail]; + if (cc_req->cpp.is_cpp) { + + dev_dbg(dev, "CPP request completion slot: %d alg:%d\n", + cc_req->cpp.slot, cc_req->cpp.alg); + mask = cc_cpp_int_mask(cc_req->cpp.alg, + cc_req->cpp.slot); + rc = (drvdata->irq & mask ? -EPERM : 0); + dev_dbg(dev, "Got mask: %x irq: %x rc: %d\n", mask, + drvdata->irq, rc); + } else { + dev_dbg(dev, "None CPP request completion\n"); + rc = 0; + } + if (cc_req->user_cb) - cc_req->user_cb(dev, cc_req->user_arg, 0); + cc_req->user_cb(dev, cc_req->user_arg, rc); *tail = (*tail + 1) & (MAX_REQUEST_QUEUE_SIZE - 1); dev_dbg(dev, "Dequeue request tail=%u\n", *tail); dev_dbg(dev, "Request completed. axi_completed=%d\n", @@ -618,47 +662,50 @@ static void comp_handler(unsigned long devarg) struct cc_drvdata *drvdata = (struct cc_drvdata *)devarg; struct cc_req_mgr_handle *request_mgr_handle = drvdata->request_mgr_handle; - + struct device *dev = drvdata_to_dev(drvdata); u32 irq; - irq = (drvdata->irq & CC_COMP_IRQ_MASK); + dev_dbg(dev, "Completion handler called!\n"); + irq = (drvdata->irq & drvdata->comp_mask); - if (irq & CC_COMP_IRQ_MASK) { - /* To avoid the interrupt from firing as we unmask it, - * we clear it now - */ - cc_iowrite(drvdata, CC_REG(HOST_ICR), CC_COMP_IRQ_MASK); + /* To avoid the interrupt from firing as we unmask it, + * we clear it now + */ + cc_iowrite(drvdata, CC_REG(HOST_ICR), irq); - /* Avoid race with above clear: Test completion counter - * once more - */ - request_mgr_handle->axi_completed += - cc_axi_comp_count(drvdata); + /* Avoid race with above clear: Test completion counter once more */ - while (request_mgr_handle->axi_completed) { - do { - proc_completions(drvdata); - /* At this point (after proc_completions()), - * request_mgr_handle->axi_completed is 0. - */ - request_mgr_handle->axi_completed = - cc_axi_comp_count(drvdata); - } while (request_mgr_handle->axi_completed > 0); + request_mgr_handle->axi_completed += cc_axi_comp_count(drvdata); - cc_iowrite(drvdata, CC_REG(HOST_ICR), - CC_COMP_IRQ_MASK); + dev_dbg(dev, "AXI completion after updated: %d\n", + request_mgr_handle->axi_completed); + while (request_mgr_handle->axi_completed) { + do { + drvdata->irq |= cc_ioread(drvdata, CC_REG(HOST_IRR)); + irq = (drvdata->irq & drvdata->comp_mask); + proc_completions(drvdata); + + /* At this point (after proc_completions()), + * request_mgr_handle->axi_completed is 0. + */ request_mgr_handle->axi_completed += - cc_axi_comp_count(drvdata); - } + cc_axi_comp_count(drvdata); + } while (request_mgr_handle->axi_completed > 0); + + cc_iowrite(drvdata, CC_REG(HOST_ICR), irq); + + request_mgr_handle->axi_completed += cc_axi_comp_count(drvdata); } + /* after verifing that there is nothing to do, * unmask AXI completion interrupt */ cc_iowrite(drvdata, CC_REG(HOST_IMR), - cc_ioread(drvdata, CC_REG(HOST_IMR)) & ~irq); + cc_ioread(drvdata, CC_REG(HOST_IMR)) & ~drvdata->comp_mask); cc_proc_backlog(drvdata); + dev_dbg(dev, "Comp. handler done.\n"); } /*