Messages in this thread | | | Date | Mon, 20 Mar 2017 16:49:32 -0700 (PDT) | From | matthew.gerlach@linux ... | Subject | Re: [PATCH v5 2/4] fpga pr ip: Core driver support for Altera Partial Reconfiguration IP. |
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On Sat, 18 Mar 2017, Anatolij Gustschin wrote:
> Hi Matthew, >
Hi Anatolij,
More good feedback. See below.
> thanks for the patches. Please see some comments below. > > On Fri, 10 Mar 2017 11:40:25 -0800 > matthew.gerlach@linux.intel.com matthew.gerlach@linux.intel.com wrote: > > ... >> + if (!(info->flags & FPGA_MGR_PARTIAL_RECONFIG)) { >> + pr_err("%s Partial Reconfiguration flag not set\n", __func__); > > please use dev_err() here. > > ... >> + if (val & ALT_PR_CSR_PR_START) { >> + pr_err("%s Partial Reconfiguration already started\n", > > dev_err(), too.
Good catch on both of these pr_err(). dev_err() would be better. > > ... >> +static int alt_pr_fpga_write_complete(struct fpga_manager *mgr, >> + struct fpga_image_info *info) >> +{ >> + u32 i; >> + >> + for (i = 0; i < info->config_complete_timeout_us; i++) { >> + switch (alt_pr_fpga_state(mgr)) { >> + case FPGA_MGR_STATE_WRITE_ERR: >> + return -EIO; >> + >> + case FPGA_MGR_STATE_OPERATING: >> + dev_info(&mgr->dev, >> + "successful partial reconfiguration\n"); >> + return 0; >> + >> + default: >> + break; >> + } >> + udelay(1); >> + } >> + dev_err(&mgr->dev, "timed out waiting for write to complete\n"); >> + return -ETIMEDOUT; >> +} > > we will always get timed out error if info->config_complete_timeout_us > is zero. Can we change to > u32 i = 0; > ... > do { > ... > } while (info->config_complete_timeout_us > i++); > ?
This seems more than reasonable to me.
> > ... >> diff --git a/drivers/fpga/altera-pr-ip-core.h b/drivers/fpga/altera-pr-ip-core.h >> new file mode 100644 >> index 0000000..3810a90 >> --- /dev/null >> +++ b/drivers/fpga/altera-pr-ip-core.h > > Should we move this header to include/linux/? We can use register/ > unregister functions in other drivers (PCIe) outside drivers/fpga > then. > > Thanks, > > Anatolij >
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