diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/cpuidle/cpuidle-powernv.c | 4 | ||||
| -rw-r--r-- | drivers/crypto/nx/nx-842-powernv.c | 167 | ||||
| -rw-r--r-- | drivers/crypto/nx/nx-842.c | 2 | ||||
| -rw-r--r-- | drivers/misc/cxl/api.c | 16 | ||||
| -rw-r--r-- | drivers/misc/cxl/context.c | 3 | ||||
| -rw-r--r-- | drivers/misc/cxl/cxl.h | 22 | ||||
| -rw-r--r-- | drivers/misc/cxl/debugfs.c | 29 | ||||
| -rw-r--r-- | drivers/misc/cxl/fault.c | 15 | ||||
| -rw-r--r-- | drivers/misc/cxl/file.c | 24 | ||||
| -rw-r--r-- | drivers/misc/cxl/native.c | 27 | ||||
| -rw-r--r-- | drivers/misc/cxl/pci.c | 88 | ||||
| -rw-r--r-- | drivers/mtd/devices/powernv_flash.c | 83 |
12 files changed, 268 insertions, 212 deletions
diff --git a/drivers/cpuidle/cpuidle-powernv.c b/drivers/cpuidle/cpuidle-powernv.c index ed6531f075c6..e06605b21841 100644 --- a/drivers/cpuidle/cpuidle-powernv.c +++ b/drivers/cpuidle/cpuidle-powernv.c @@ -384,9 +384,9 @@ static int powernv_add_idle_states(void) * Firmware passes residency and latency values in ns. * cpuidle expects it in us. */ - exit_latency = latency_ns[i] / 1000; + exit_latency = DIV_ROUND_UP(latency_ns[i], 1000); if (!rc) - target_residency = residency_ns[i] / 1000; + target_residency = DIV_ROUND_UP(residency_ns[i], 1000); else target_residency = 0; diff --git a/drivers/crypto/nx/nx-842-powernv.c b/drivers/crypto/nx/nx-842-powernv.c index 0f20f5ec9617..f2246a5abcf6 100644 --- a/drivers/crypto/nx/nx-842-powernv.c +++ b/drivers/crypto/nx/nx-842-powernv.c @@ -46,7 +46,6 @@ struct nx842_workmem { ktime_t start; - struct vas_window *txwin; /* Used with VAS function */ char padding[WORKMEM_ALIGN]; /* unused, to allow alignment */ } __packed __aligned(WORKMEM_ALIGN); @@ -65,7 +64,7 @@ struct nx842_coproc { * Send the request to NX engine on the chip for the corresponding CPU * where the process is executing. Use with VAS function. */ -static DEFINE_PER_CPU(struct nx842_coproc *, coproc_inst); +static DEFINE_PER_CPU(struct vas_window *, cpu_txwin); /* no cpu hotplug on powernv, so this list never changes after init */ static LIST_HEAD(nx842_coprocs); @@ -586,16 +585,11 @@ static int nx842_exec_vas(const unsigned char *in, unsigned int inlen, ccw = SET_FIELD(CCW_FC_842, ccw, fc); crb->ccw = cpu_to_be32(ccw); - txwin = wmem->txwin; - /* shoudn't happen, we don't load without a coproc */ - if (!txwin) { - pr_err_ratelimited("NX-842 coprocessor is not available"); - return -ENODEV; - } - do { wmem->start = ktime_get(); preempt_disable(); + txwin = this_cpu_read(cpu_txwin); + /* * VAS copy CRB into L2 cache. Refer <asm/vas.h>. * @crb and @offset. @@ -689,25 +683,6 @@ static inline void nx842_add_coprocs_list(struct nx842_coproc *coproc, list_add(&coproc->list, &nx842_coprocs); } -/* - * Identify chip ID for each CPU and save coprocesor adddress for the - * corresponding NX engine in percpu coproc_inst. - * coproc_inst is used in crypto_init to open send window on the NX instance - * for the corresponding CPU / chip where the open request is executed. - */ -static void nx842_set_per_cpu_coproc(struct nx842_coproc *coproc) -{ - unsigned int i, chip_id; - - for_each_possible_cpu(i) { - chip_id = cpu_to_chip_id(i); - - if (coproc->chip_id == chip_id) - per_cpu(coproc_inst, i) = coproc; - } -} - - static struct vas_window *nx842_alloc_txwin(struct nx842_coproc *coproc) { struct vas_window *txwin = NULL; @@ -725,15 +700,58 @@ static struct vas_window *nx842_alloc_txwin(struct nx842_coproc *coproc) * Open a VAS send window which is used to send request to NX. */ txwin = vas_tx_win_open(coproc->vas.id, coproc->ct, &txattr); - if (IS_ERR(txwin)) { + if (IS_ERR(txwin)) pr_err("ibm,nx-842: Can not open TX window: %ld\n", PTR_ERR(txwin)); - return NULL; - } return txwin; } +/* + * Identify chip ID for each CPU, open send wndow for the corresponding NX + * engine and save txwin in percpu cpu_txwin. + * cpu_txwin is used in copy/paste operation for each compression / + * decompression request. + */ +static int nx842_open_percpu_txwins(void) +{ + struct nx842_coproc *coproc, *n; + unsigned int i, chip_id; + + for_each_possible_cpu(i) { + struct vas_window *txwin = NULL; + + chip_id = cpu_to_chip_id(i); + + list_for_each_entry_safe(coproc, n, &nx842_coprocs, list) { + /* + * Kernel requests use only high priority FIFOs. So + * open send windows for these FIFOs. + */ + + if (coproc->ct != VAS_COP_TYPE_842_HIPRI) + continue; + + if (coproc->chip_id == chip_id) { + txwin = nx842_alloc_txwin(coproc); + if (IS_ERR(txwin)) + return PTR_ERR(txwin); + + per_cpu(cpu_txwin, i) = txwin; + break; + } + } + + if (!per_cpu(cpu_txwin, i)) { + /* shoudn't happen, Each chip will have NX engine */ + pr_err("NX engine is not availavle for CPU %d\n", i); + return -EINVAL; + } + } + + return 0; +} + static int __init vas_cfg_coproc_info(struct device_node *dn, int chip_id, int vasid) { @@ -819,14 +837,6 @@ static int __init vas_cfg_coproc_info(struct device_node *dn, int chip_id, coproc->vas.id = vasid; nx842_add_coprocs_list(coproc, chip_id); - /* - * Kernel requests use only high priority FIFOs. So save coproc - * info in percpu coproc_inst which will be used to open send - * windows for crypto open requests later. - */ - if (coproc->ct == VAS_COP_TYPE_842_HIPRI) - nx842_set_per_cpu_coproc(coproc); - return 0; err_out: @@ -847,24 +857,12 @@ static int __init nx842_powernv_probe_vas(struct device_node *pn) return -EINVAL; } - for_each_compatible_node(dn, NULL, "ibm,power9-vas-x") { - if (of_get_ibm_chip_id(dn) == chip_id) - break; - } - - if (!dn) { - pr_err("Missing VAS device node\n"); + vasid = chip_to_vas_id(chip_id); + if (vasid < 0) { + pr_err("Unable to map chip_id %d to vasid\n", chip_id); return -EINVAL; } - if (of_property_read_u32(dn, "ibm,vas-id", &vasid)) { - pr_err("Missing ibm,vas-id device property\n"); - of_node_put(dn); - return -EINVAL; - } - - of_node_put(dn); - for_each_child_of_node(pn, dn) { if (of_device_is_compatible(dn, "ibm,p9-nx-842")) { ret = vas_cfg_coproc_info(dn, chip_id, vasid); @@ -928,6 +926,19 @@ static int __init nx842_powernv_probe(struct device_node *dn) static void nx842_delete_coprocs(void) { struct nx842_coproc *coproc, *n; + struct vas_window *txwin; + int i; + + /* + * close percpu txwins that are opened for the corresponding coproc. + */ + for_each_possible_cpu(i) { + txwin = per_cpu(cpu_txwin, i); + if (txwin) + vas_win_close(txwin); + + per_cpu(cpu_txwin, i) = 0; + } list_for_each_entry_safe(coproc, n, &nx842_coprocs, list) { if (coproc->vas.rxwin) @@ -954,46 +965,6 @@ static struct nx842_driver nx842_powernv_driver = { .decompress = nx842_powernv_decompress, }; -static int nx842_powernv_crypto_init_vas(struct crypto_tfm *tfm) -{ - struct nx842_crypto_ctx *ctx = crypto_tfm_ctx(tfm); - struct nx842_workmem *wmem; - struct nx842_coproc *coproc; - int ret; - - ret = nx842_crypto_init(tfm, &nx842_powernv_driver); - - if (ret) - return ret; - - wmem = PTR_ALIGN((struct nx842_workmem *)ctx->wmem, WORKMEM_ALIGN); - coproc = per_cpu(coproc_inst, smp_processor_id()); - - ret = -EINVAL; - if (coproc && coproc->vas.rxwin) { - wmem->txwin = nx842_alloc_txwin(coproc); - if (!IS_ERR(wmem->txwin)) - return 0; - - ret = PTR_ERR(wmem->txwin); - } - - return ret; -} - -void nx842_powernv_crypto_exit_vas(struct crypto_tfm *tfm) -{ - struct nx842_crypto_ctx *ctx = crypto_tfm_ctx(tfm); - struct nx842_workmem *wmem; - - wmem = PTR_ALIGN((struct nx842_workmem *)ctx->wmem, WORKMEM_ALIGN); - - if (wmem && wmem->txwin) - vas_win_close(wmem->txwin); - - nx842_crypto_exit(tfm); -} - static int nx842_powernv_crypto_init(struct crypto_tfm *tfm) { return nx842_crypto_init(tfm, &nx842_powernv_driver); @@ -1044,9 +1015,13 @@ static __init int nx842_powernv_init(void) nx842_powernv_exec = nx842_exec_icswx; } else { + ret = nx842_open_percpu_txwins(); + if (ret) { + nx842_delete_coprocs(); + return ret; + } + nx842_powernv_exec = nx842_exec_vas; - nx842_powernv_alg.cra_init = nx842_powernv_crypto_init_vas; - nx842_powernv_alg.cra_exit = nx842_powernv_crypto_exit_vas; } ret = crypto_register_alg(&nx842_powernv_alg); diff --git a/drivers/crypto/nx/nx-842.c b/drivers/crypto/nx/nx-842.c index da3cb8c35ec7..d94e25df503b 100644 --- a/drivers/crypto/nx/nx-842.c +++ b/drivers/crypto/nx/nx-842.c @@ -116,7 +116,7 @@ int nx842_crypto_init(struct crypto_tfm *tfm, struct nx842_driver *driver) spin_lock_init(&ctx->lock); ctx->driver = driver; - ctx->wmem = kzalloc(driver->workmem_size, GFP_KERNEL); + ctx->wmem = kmalloc(driver->workmem_size, GFP_KERNEL); ctx->sbounce = (u8 *)__get_free_pages(GFP_KERNEL, BOUNCE_BUFFER_ORDER); ctx->dbounce = (u8 *)__get_free_pages(GFP_KERNEL, BOUNCE_BUFFER_ORDER); if (!ctx->wmem || !ctx->sbounce || !ctx->dbounce) { diff --git a/drivers/misc/cxl/api.c b/drivers/misc/cxl/api.c index a0c44d16bf30..7c11bad5cded 100644 --- a/drivers/misc/cxl/api.c +++ b/drivers/misc/cxl/api.c @@ -15,6 +15,7 @@ #include <linux/module.h> #include <linux/mount.h> #include <linux/sched/mm.h> +#include <linux/mmu_context.h> #include "cxl.h" @@ -331,9 +332,12 @@ int cxl_start_context(struct cxl_context *ctx, u64 wed, /* ensure this mm_struct can't be freed */ cxl_context_mm_count_get(ctx); - /* decrement the use count */ - if (ctx->mm) + if (ctx->mm) { + /* decrement the use count from above */ mmput(ctx->mm); + /* make TLBIs for this context global */ + mm_context_add_copro(ctx->mm); + } } /* @@ -342,13 +346,19 @@ int cxl_start_context(struct cxl_context *ctx, u64 wed, */ cxl_ctx_get(); + /* See the comment in afu_ioctl_start_work() */ + smp_mb(); + if ((rc = cxl_ops->attach_process(ctx, kernel, wed, 0))) { put_pid(ctx->pid); ctx->pid = NULL; cxl_adapter_context_put(ctx->afu->adapter); cxl_ctx_put(); - if (task) + if (task) { cxl_context_mm_count_put(ctx); + if (ctx->mm) + mm_context_remove_copro(ctx->mm); + } goto out; } diff --git a/drivers/misc/cxl/context.c b/drivers/misc/cxl/context.c index 8c32040b9c09..12a41b2753f0 100644 --- a/drivers/misc/cxl/context.c +++ b/drivers/misc/cxl/context.c @@ -18,6 +18,7 @@ #include <linux/slab.h> #include <linux/idr.h> #include <linux/sched/mm.h> +#include <linux/mmu_context.h> #include <asm/cputable.h> #include <asm/current.h> #include <asm/copro.h> @@ -267,6 +268,8 @@ int __detach_context(struct cxl_context *ctx) /* Decrease the mm count on the context */ cxl_context_mm_count_put(ctx); + if (ctx->mm) + mm_context_remove_copro(ctx->mm); ctx->mm = NULL; return 0; diff --git a/drivers/misc/cxl/cxl.h b/drivers/misc/cxl/cxl.h index b1afeccbb97f..e46a4062904a 100644 --- a/drivers/misc/cxl/cxl.h +++ b/drivers/misc/cxl/cxl.h @@ -100,9 +100,12 @@ static const cxl_p1_reg_t CXL_XSL_FEC = {0x0158}; static const cxl_p1_reg_t CXL_XSL_DSNCTL = {0x0168}; /* PSL registers - CAIA 2 */ static const cxl_p1_reg_t CXL_PSL9_CONTROL = {0x0020}; +static const cxl_p1_reg_t CXL_XSL9_INV = {0x0110}; +static const cxl_p1_reg_t CXL_XSL9_DBG = {0x0130}; +static const cxl_p1_reg_t CXL_XSL9_DEF = {0x0140}; static const cxl_p1_reg_t CXL_XSL9_DSNCTL = {0x0168}; static const cxl_p1_reg_t CXL_PSL9_FIR1 = {0x0300}; -static const cxl_p1_reg_t CXL_PSL9_FIR2 = {0x0308}; +static const cxl_p1_reg_t CXL_PSL9_FIR_MASK = {0x0308}; static const cxl_p1_reg_t CXL_PSL9_Timebase = {0x0310}; static const cxl_p1_reg_t CXL_PSL9_DEBUG = {0x0320}; static const cxl_p1_reg_t CXL_PSL9_FIR_CNTL = {0x0348}; @@ -112,6 +115,7 @@ static const cxl_p1_reg_t CXL_PSL9_TRACECFG = {0x0368}; static const cxl_p1_reg_t CXL_PSL9_APCDEDALLOC = {0x0378}; static const cxl_p1_reg_t CXL_PSL9_APCDEDTYPE = {0x0380}; static const cxl_p1_reg_t CXL_PSL9_TNR_ADDR = {0x0388}; +static const cxl_p1_reg_t CXL_PSL9_CTCCFG = {0x0390}; static const cxl_p1_reg_t CXL_PSL9_GP_CT = {0x0398}; static const cxl_p1_reg_t CXL_XSL9_IERAT = {0x0588}; static const cxl_p1_reg_t CXL_XSL9_ILPP = {0x0590}; @@ -414,6 +418,9 @@ static const cxl_p2n_reg_t CXL_PSL_WED_An = {0x0A0}; #define CXL_CARD_MINOR(adapter) (adapter->adapter_num * CXL_DEV_MINORS) #define CXL_DEVT_ADAPTER(dev) (MINOR(dev) / CXL_DEV_MINORS) +#define CXL_PSL9_TRACEID_MAX 0xAU +#define CXL_PSL9_TRACESTATE_FIN 0x3U + enum cxl_context_status { CLOSED, OPENED, @@ -938,8 +945,6 @@ int cxl_debugfs_adapter_add(struct cxl *adapter); void cxl_debugfs_adapter_remove(struct cxl *adapter); int cxl_debugfs_afu_add(struct cxl_afu *afu); void cxl_debugfs_afu_remove(struct cxl_afu *afu); -void cxl_stop_trace_psl9(struct cxl *cxl); -void cxl_stop_trace_psl8(struct cxl *cxl); void cxl_debugfs_add_adapter_regs_psl9(struct cxl *adapter, struct dentry *dir); void cxl_debugfs_add_adapter_regs_psl8(struct cxl *adapter, struct dentry *dir); void cxl_debugfs_add_adapter_regs_xsl(struct cxl *adapter, struct dentry *dir); @@ -975,14 +980,6 @@ static inline void cxl_debugfs_afu_remove(struct cxl_afu *afu) { } -static inline void cxl_stop_trace_psl9(struct cxl *cxl) -{ -} - -static inline void cxl_stop_trace_psl8(struct cxl *cxl) -{ -} - static inline void cxl_debugfs_add_adapter_regs_psl9(struct cxl *adapter, struct dentry *dir) { @@ -1070,7 +1067,8 @@ u64 cxl_calculate_sr(bool master, bool kernel, bool real_mode, bool p9); void cxl_native_irq_dump_regs_psl9(struct cxl_context *ctx); void cxl_native_irq_dump_regs_psl8(struct cxl_context *ctx); -void cxl_native_err_irq_dump_regs(struct cxl *adapter); +void cxl_native_err_irq_dump_regs_psl8(struct cxl *adapter); +void cxl_native_err_irq_dump_regs_psl9(struct cxl *adapter); int cxl_pci_vphb_add(struct cxl_afu *afu); void cxl_pci_vphb_remove(struct cxl_afu *afu); void cxl_release_mapping(struct cxl_context *ctx); diff --git a/drivers/misc/cxl/debugfs.c b/drivers/misc/cxl/debugfs.c index eae9d749f967..1643850d2302 100644 --- a/drivers/misc/cxl/debugfs.c +++ b/drivers/misc/cxl/debugfs.c @@ -15,28 +15,6 @@ static struct dentry *cxl_debugfs; -void cxl_stop_trace_psl9(struct cxl *adapter) -{ - /* Stop the trace */ - cxl_p1_write(adapter, CXL_PSL9_TRACECFG, 0x4480000000000000ULL); -} - -void cxl_stop_trace_psl8(struct cxl *adapter) -{ - int slice; - - /* Stop the trace */ - cxl_p1_write(adapter, CXL_PSL_TRACE, 0x8000000000000017LL); - - /* Stop the slice traces */ - spin_lock(&adapter->afu_list_lock); - for (slice = 0; slice < adapter->slices; slice++) { - if (adapter->afu[slice]) - cxl_p1n_write(adapter->afu[slice], CXL_PSL_SLICE_TRACE, 0x8000000000000000LL); - } - spin_unlock(&adapter->afu_list_lock); -} - /* Helpers to export CXL mmaped IO registers via debugfs */ static int debugfs_io_u64_get(void *data, u64 *val) { @@ -62,9 +40,14 @@ static struct dentry *debugfs_create_io_x64(const char *name, umode_t mode, void cxl_debugfs_add_adapter_regs_psl9(struct cxl *adapter, struct dentry *dir) { debugfs_create_io_x64("fir1", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR1)); - debugfs_create_io_x64("fir2", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR2)); + debugfs_create_io_x64("fir_mask", 0400, dir, + _cxl_p1_addr(adapter, CXL_PSL9_FIR_MASK)); debugfs_create_io_x64("fir_cntl", S_IRUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_FIR_CNTL)); debugfs_create_io_x64("trace", S_IRUSR | S_IWUSR, dir, _cxl_p1_addr(adapter, CXL_PSL9_TRACECFG)); + debugfs_create_io_x64("debug", 0600, dir, + _cxl_p1_addr(adapter, CXL_PSL9_DEBUG)); + debugfs_create_io_x64("xsl-debug", 0600, dir, + _cxl_p1_addr(adapter, CXL_XSL9_DBG)); } void cxl_debugfs_add_adapter_regs_psl8(struct cxl *adapter, struct dentry *dir) diff --git a/drivers/misc/cxl/fault.c b/drivers/misc/cxl/fault.c index f17f72ea0545..70dbb6de102c 100644 --- a/drivers/misc/cxl/fault.c +++ b/drivers/misc/cxl/fault.c @@ -220,22 +220,11 @@ static bool cxl_is_segment_miss(struct cxl_context *ctx, u64 dsisr) static bool cxl_is_page_fault(struct cxl_context *ctx, u64 dsisr) { - u64 crs; /* Translation Checkout Response Status */ - if ((cxl_is_power8()) && (dsisr & CXL_PSL_DSISR_An_DM)) return true; - if (cxl_is_power9()) { - crs = (dsisr & CXL_PSL9_DSISR_An_CO_MASK); - if ((crs == CXL_PSL9_DSISR_An_PF_SLR) || - (crs == CXL_PSL9_DSISR_An_PF_RGC) || - (crs == CXL_PSL9_DSISR_An_PF_RGP) || - (crs == CXL_PSL9_DSISR_An_PF_HRH) || - (crs == CXL_PSL9_DSISR_An_PF_STEG) || - (crs == CXL_PSL9_DSISR_An_URTCH)) { - return true; - } - } + if (cxl_is_power9()) + return true; return false; } diff --git a/drivers/misc/cxl/file.c b/drivers/misc/cxl/file.c index 4bfad9f6dc9f..76c0b0ca9388 100644 --- a/drivers/misc/cxl/file.c +++ b/drivers/misc/cxl/file.c @@ -19,6 +19,7 @@ #include <linux/mm.h> #include <linux/slab.h> #include <linux/sched/mm.h> +#include <linux/mmu_context.h> #include <asm/cputable.h> #include <asm/current.h> #include <asm/copro.h> @@ -220,9 +221,12 @@ static long afu_ioctl_start_work(struct cxl_context *ctx, /* ensure this mm_struct can't be freed */ cxl_context_mm_count_get(ctx); - /* decrement the use count */ - if (ctx->mm) + if (ctx->mm) { + /* decrement the use count from above */ mmput(ctx->mm); + /* make TLBIs for this context global */ + mm_context_add_copro(ctx->mm); + } /* * Increment driver use count. Enables global TLBIs for hash @@ -230,6 +234,20 @@ static long afu_ioctl_start_work(struct cxl_context *ctx, */ cxl_ctx_get(); + /* + * A barrier is needed to make sure all TLBIs are global + * before we attach and the context starts being used by the + * adapter. + * + * Needed after mm_context_add_copro() for radix and + * cxl_ctx_get() for hash/p8. + * + * The barrier should really be mb(), since it involves a + * device. However, it's only useful when we have local + * vs. global TLBIs, i.e SMP=y. So keep smp_mb(). + */ + smp_mb(); + trace_cxl_attach(ctx, work.work_element_descriptor, work.num_interrupts, amr); if ((rc = cxl_ops->attach_process(ctx, false, work.work_element_descriptor, @@ -240,6 +258,8 @@ static long afu_ioctl_start_work(struct cxl_context *ctx, ctx->pid = NULL; cxl_ctx_put(); cxl_context_mm_count_put(ctx); + if (ctx->mm) + mm_context_remove_copro(ctx->mm); goto out; } diff --git a/drivers/misc/cxl/native.c b/drivers/misc/cxl/native.c index 4a82c313cf71..02b6b45b4c20 100644 --- a/drivers/misc/cxl/native.c +++ b/drivers/misc/cxl/native.c @@ -897,6 +897,14 @@ int cxl_attach_dedicated_process_psl9(struct cxl_context *ctx, u64 wed, u64 amr) if (ctx->afu->adapter->native->sl_ops->update_dedicated_ivtes) afu->adapter->native->sl_ops->update_dedicated_ivtes(ctx); + ctx->elem->software_state = cpu_to_be32(CXL_PE_SOFTWARE_STATE_V); + /* + * Ideally we should do a wmb() here to make sure the changes to the + * PE are visible to the card before we call afu_enable. + * On ppc64 though all mmios are preceded by a 'sync' instruction hence + * we dont dont need one here. + */ + result = cxl_ops->afu_reset(afu); if (result) return result; @@ -1077,13 +1085,11 @@ static int native_get_irq_info(struct cxl_afu *afu, struct cxl_irq_info *info) void cxl_native_irq_dump_regs_psl9(struct cxl_context *ctx) { - u64 fir1, fir2, serr; + u64 fir1, serr; fir1 = cxl_p1_read(ctx->afu->adapter, CXL_PSL9_FIR1); - fir2 = cxl_p1_read(ctx->afu->adapter, CXL_PSL9_FIR2); dev_crit(&ctx->afu->dev, "PSL_FIR1: 0x%016llx\n", fir1); - dev_crit(&ctx->afu->dev, "PSL_FIR2: 0x%016llx\n", fir2); if (ctx->afu->adapter->native->sl_ops->register_serr_irq) { serr = cxl_p1n_read(ctx->afu, CXL_PSL_SERR_An); cxl_afu_decode_psl_serr(ctx->afu, serr); @@ -1257,14 +1263,23 @@ static irqreturn_t native_slice_irq_err(int irq, void *data) return IRQ_HANDLED; } -void cxl_native_err_irq_dump_regs(struct cxl *adapter) +void cxl_native_err_irq_dump_regs_psl9(struct cxl *adapter) +{ + u64 fir1; + + fir1 = cxl_p1_read(adapter, CXL_PSL9_FIR1); + dev_crit(&adapter->dev, "PSL_FIR: 0x%016llx\n", fir1); +} + +void cxl_native_err_irq_dump_regs_psl8(struct cxl *adapter) { u64 fir1, fir2; fir1 = cxl_p1_read(adapter, CXL_PSL_FIR1); fir2 = cxl_p1_read(adapter, CXL_PSL_FIR2); - - dev_crit(&adapter->dev, "PSL_FIR1: 0x%016llx\nPSL_FIR2: 0x%016llx\n", fir1, fir2); + dev_crit(&adapter->dev, + "PSL_FIR1: 0x%016llx\nPSL_FIR2: 0x%016llx\n", + fir1, fir2); } static irqreturn_t native_irq_err(int irq, void *data) diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c index 3ba04f371380..bb7fd3f4edab 100644 --- a/drivers/misc/cxl/pci.c +++ b/drivers/misc/cxl/pci.c @@ -401,7 +401,8 @@ int cxl_calc_capp_routing(struct pci_dev *dev, u64 *chipid, *capp_unit_id = get_capp_unit_id(np, *phb_index); of_node_put(np); if (!*capp_unit_id) { - pr_err("cxl: invalid capp unit id\n"); + pr_err("cxl: invalid capp unit id (phb_index: %d)\n", + *phb_index); return -ENODEV; } @@ -475,37 +476,37 @@ static int init_implementation_adapter_regs_psl9(struct cxl *adapter, psl_fircntl |= 0x1ULL; /* ce_thresh */ cxl_p1_write(adapter, CXL_PSL9_FIR_CNTL, psl_fircntl); - /* vccredits=0x1 pcklat=0x4 */ - cxl_p1_write(adapter, CXL_PSL9_DSNDCTL, 0x0000000000001810ULL); - - /* - * For debugging with trace arrays. - * Configure RX trace 0 segmented mode. - * Configure CT trace 0 segmented mode. - * Configure LA0 trace 0 segmented mode. - * Configure LA1 trace 0 segmented mode. + /* Setup the PSL to transmit packets on the PCIe before the + * CAPP is enabled */ - cxl_p1_write(adapter, CXL_PSL9_TRACECFG, 0x8040800080000000ULL); - cxl_p1_write(adapter, CXL_PSL9_TRACECFG, 0x8040800080000003ULL); - cxl_p1_write(adapter, CXL_PSL9_TRACECFG, 0x8040800080000005ULL); - cxl_p1_write(adapter, CXL_PSL9_TRACECFG, 0x8040800080000006ULL); + cxl_p1_write(adapter, CXL_PSL9_DSNDCTL, 0x0001001000002A10ULL); /* * A response to an ASB_Notify request is returned by the * system as an MMIO write to the address defined in - * the PSL_TNR_ADDR register + * the PSL_TNR_ADDR register. + * keep the Reset Value: 0x00020000E0000000 */ - /* PSL_TNR_ADDR */ - /* NORST */ - cxl_p1_write(adapter, CXL_PSL9_DEBUG, 0x8000000000000000ULL); + /* Enable XSL rty limit */ + cxl_p1_write(adapter, CXL_XSL9_DEF, 0x51F8000000000005ULL); + + /* Change XSL_INV dummy read threshold */ + cxl_p1_write(adapter, CXL_XSL9_INV, 0x0000040007FFC200ULL); + + if (phb_index == 3) { + /* disable machines 31-47 and 20-27 for DMA */ + cxl_p1_write(adapter, CXL_PSL9_APCDEDTYPE, 0x40000FF3FFFF0000ULL); + } - /* allocate the apc machines */ - cxl_p1_write(adapter, CXL_PSL9_APCDEDTYPE, 0x40000003FFFF0000ULL); + /* Snoop machines */ + cxl_p1_write(adapter, CXL_PSL9_APCDEDALLOC, 0x800F000200000000ULL); - /* Disable vc dd1 fix */ - if (cxl_is_power9_dd1()) - cxl_p1_write(adapter, CXL_PSL9_GP_CT, 0x0400000000000001ULL); + if (cxl_is_power9_dd1()) { + /* Disabling deadlock counter CAR */ + cxl_p1_write(adapter, CXL_PSL9_GP_CT, 0x0020000000000001ULL); + } else + cxl_p1_write(adapter, CXL_PSL9_DEBUG, 0x4000000000000000ULL); return 0; } @@ -1746,6 +1747,44 @@ static void cxl_deconfigure_adapter(struct cxl *adapter) pci_disable_device(pdev); } +static void cxl_stop_trace_psl9(struct cxl *adapter) +{ + int traceid; + u64 trace_state, trace_mask; + struct pci_dev *dev = to_pci_dev(adapter->dev.parent); + + /* read each tracearray state and issue mmio to stop them is needed */ + for (traceid = 0; traceid <= CXL_PSL9_TRACEID_MAX; ++traceid) { + trace_state = cxl_p1_read(adapter, CXL_PSL9_CTCCFG); + trace_mask = (0x3ULL << (62 - traceid * 2)); + trace_state = (trace_state & trace_mask) >> (62 - traceid * 2); + dev_dbg(&dev->dev, "cxl: Traceid-%d trace_state=0x%0llX\n", + traceid, trace_state); + + /* issue mmio if the trace array isn't in FIN state */ + if (trace_state != CXL_PSL9_TRACESTATE_FIN) + cxl_p1_write(adapter, CXL_PSL9_TRACECFG, + 0x8400000000000000ULL | traceid); + } +} + +static void cxl_stop_trace_psl8(struct cxl *adapter) +{ + int slice; + + /* Stop the trace */ + cxl_p1_write(adapter, CXL_PSL_TRACE, 0x8000000000000017LL); + + /* Stop the slice traces */ + spin_lock(&adapter->afu_list_lock); + for (slice = 0; slice < adapter->slices; slice++) { + if (adapter->afu[slice]) + cxl_p1n_write(adapter->afu[slice], CXL_PSL_SLICE_TRACE, + 0x8000000000000000LL); + } + spin_unlock(&adapter->afu_list_lock); +} + static const struct cxl_service_layer_ops psl9_ops = { .adapter_regs_init = init_implementation_adapter_regs_psl9, .invalidate_all = cxl_invalidate_all_psl9, @@ -1762,6 +1801,7 @@ static const struct cxl_service_layer_ops psl9_ops = { .debugfs_add_adapter_regs = cxl_debugfs_add_adapter_regs_psl9, .debugfs_add_afu_regs = cxl_debugfs_add_afu_regs_psl9, .psl_irq_dump_registers = cxl_native_irq_dump_regs_psl9, + .err_irq_dump_registers = cxl_native_err_irq_dump_regs_psl9, .debugfs_stop_trace = cxl_stop_trace_psl9, .write_timebase_ctrl = write_timebase_ctrl_psl9, .timebase_read = timebase_read_psl9, @@ -1785,7 +1825,7 @@ static const struct cxl_service_layer_ops psl8_ops = { .debugfs_add_adapter_regs = cxl_debugfs_add_adapter_regs_psl8, .debugfs_add_afu_regs = cxl_debugfs_add_afu_regs_psl8, .psl_irq_dump_registers = cxl_native_irq_dump_regs_psl8, - .err_irq_dump_registers = cxl_native_err_irq_dump_regs, + .err_irq_dump_registers = cxl_native_err_irq_dump_regs_psl8, .debugfs_stop_trace = cxl_stop_trace_psl8, .write_timebase_ctrl = write_timebase_ctrl_psl8, .timebase_read = timebase_read_psl8, diff --git a/drivers/mtd/devices/powernv_flash.c b/drivers/mtd/devices/powernv_flash.c index f5396f26ddb4..26f9feaa5d17 100644 --- a/drivers/mtd/devices/powernv_flash.c +++ b/drivers/mtd/devices/powernv_flash.c @@ -47,6 +47,11 @@ enum flash_op { FLASH_OP_ERASE, }; +/* + * Don't return -ERESTARTSYS if we can't get a token, the MTD core + * might have split up the call from userspace and called into the + * driver more than once, we'll already have done some amount of work. + */ static int powernv_flash_async_op(struct mtd_info *mtd, enum flash_op op, loff_t offset, size_t len, size_t *retlen, u_char *buf) { @@ -63,7 +68,8 @@ static int powernv_flash_async_op(struct mtd_info *mtd, enum flash_op op, if (token < 0) { if (token != -ERESTARTSYS) dev_err(dev, "Failed to get an async token\n"); - + else + token = -EINTR; return token; } @@ -78,32 +84,53 @@ static int powernv_flash_async_op(struct mtd_info *mtd, enum flash_op op, rc = opal_flash_erase(info->id, offset, len, token); break; default: - BUG_ON(1); - } - - if (rc != OPAL_ASYNC_COMPLETION) { - dev_err(dev, "opal_flash_async_op(op=%d) failed (rc %d)\n", - op, rc); + WARN_ON_ONCE(1); opal_async_release_token(token); return -EIO; } - rc = opal_async_wait_response(token, &msg); - opal_async_release_token(token); - if (rc) { - dev_err(dev, "opal async wait failed (rc %d)\n", rc); - return -EIO; + if (rc == OPAL_ASYNC_COMPLETION) { + rc = opal_async_wait_response_interruptible(token, &msg); + if (rc) { + /* + * If we return the mtd core will free the + * buffer we've just passed to OPAL but OPAL + * will continue to read or write from that + * memory. + * It may be tempting to ultimately return 0 + * if we're doing a read or a write since we + * are going to end up waiting until OPAL is + * done. However, because the MTD core sends + * us the userspace request in chunks, we need + * it to know we've been interrupted. + */ + rc = -EINTR; + if (opal_async_wait_response(token, &msg)) + dev_err(dev, "opal_async_wait_response() failed\n"); + goto out; + } + rc = opal_get_async_rc(msg); } - rc = opal_get_async_rc(msg); - if (rc == OPAL_SUCCESS) { - rc = 0; - if (retlen) - *retlen = len; - } else { - rc = -EIO; - } + /* + * OPAL does mutual exclusion on the flash, it will return + * OPAL_BUSY. + * During firmware updates by the service processor OPAL may + * be (temporarily) prevented from accessing the flash, in + * this case OPAL will also return OPAL_BUSY. + * Both cases aren't errors exactly but the flash could have + * changed, userspace should be informed. + */ + if (rc != OPAL_SUCCESS && rc != OPAL_BUSY) + dev_err(dev, "opal_flash_async_op(op=%d) failed (rc %d)\n", + op, rc); + + if (rc == OPAL_SUCCESS && retlen) + *retlen = len; + rc = opal_error_code(rc); +out: + opal_async_release_token(token); return rc; } @@ -220,21 +247,20 @@ static int powernv_flash_probe(struct platform_device *pdev) int ret; data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); - if (!data) { - ret = -ENOMEM; - goto out; - } + if (!data) + return -ENOMEM; + data->mtd.priv = data; ret = of_property_read_u32(dev->of_node, "ibm,opal-id", &(data->id)); if (ret) { dev_err(dev, "no device property 'ibm,opal-id'\n"); - goto out; + return ret; } ret = powernv_flash_set_driver_info(dev, &data->mtd); if (ret) - goto out; + return ret; dev_set_drvdata(dev, data); @@ -243,10 +269,7 @@ static int powernv_flash_probe(struct platform_device *pdev) * with an ffs partition at the start, it should prove easier for users * to deal with partitions or not as they see fit */ - ret = mtd_device_register(&data->mtd, NULL, 0); - -out: - return ret; + return mtd_device_register(&data->mtd, NULL, 0); } /** |
